265results about How to "Reduce leak points" patented technology

The invention discloses a sealing connection method of metal and glass of a novel medium-high temperature solar energy heat collection pipe, which relates to a method for matched sealing connection of two materials: the metal of kovar alloy and the glass of neutral borosilicate glass with the similar thermal expansion coefficients. The invention provides a novel method for manufacturing the metal glass medium-high temperature solar energy heat collection pipe. In the method, the difference of the thermal expansion coefficient of the kovar alloy and the thermal expansion coefficient of the neutral borosilicate glass is in a range between 5 percent and 10 percent, the difference of the thermal expansion coefficient of the transition section glass and the thermal expansion coefficient of the neutral borosilicate glass is in a range between 5 and 10 percent, the sealing connection temperature of the neutral borosilicate glass and the transition section glass is between 600 and 1000 DEG C, the heating temperature of the sealing connection region of the kovar alloy and the transition section glass is between 600 and 1200 DEG C, the length of the sealing connection opening is between 3 and 8 mm, and the whole sealing connection section of the neutral borosilicate glass, the transition section glass and the kovar alloy after the sealing connection carries out the annealing processing at the annealing temperature between 450 and 600 DEG C for 10 to 60 minutes.

The invention discloses a method for preparing an isocyanate monomer. The method comprises the following steps: adding a first batch of solvents in a reaction kettle and circulating; compressing HCl, conveying HCl in a salt-forming reaction kettle through the outer tube of a mixer, carrying out gas-liquid separation and then circulating HCl in a system through a Venturi mixer; mixing diamine with the residual solvents in the inner tube of the mixer, then mixing the mixture with HCl in the outer tube, and then conveying the mixture in the salt-forming reaction kettle and reacting to obtain a diamine hydrochloride solution; reacting the diamine hydrochloride solution with phosgene under a pressurization condition to obtain an isocyanate photochemical solution. The mixer comprises the inner tube and the outer tube, wherein a spiral plate is installed in the thick-diameter part of the inner tube, a hole is formed in the tube wall of the thin-diameter part of the inner tube, and the bottom of the inner tube is a detachable bottom plate; the outer tube sleeves outside the inner tube, and the bottom of the outer tube is a mixer outlet. The method disclosed by the invention reinforces the mixing effect of the gas-liquid reaction, the obtained hydrochloride particles are uniform, the use efficiency of HCl is high, the energy consumption is low, and the purity of the photochemical solution after a phosgenation reaction is high.

The invention discloses a combination unit for carrying out segmented control on heat exchange temperature and pressure of a multi-component gas, gas liquid separation, and staged recover of condensate. The combination unit is tower-shaped equipment, and is divided into upper, middle and lower parts, wherein the three parts are connected by flanges. The gas flows in the tower from bottom to top; the lower part of the tower body is used for removing the entrained liquid of a gas which enters into the tower, and collecting the condensate generated by upper heat-exchange equipment; the middle part of the tower body is formed by multiple sections of modular equipment; a heat exchanger of the modular equipment at each section is a spiral-plate exchanger; the modular equipment at each section is used for automatically controlling the heat exchange temperature and pressure of a gas and gas liquid separation, and is used for collecting condensate produced by the modular equipment at the previous section; and the upper part of the tower body is used for primarily and automatically controlling the heat exchange temperature and pressure of a gas and gas liquid separation. The combination unit is characterized in that the section number of the modular equipment can be freely and flexibly selected so as to be combined with the upper part and the lower part of the lower into the whole equipment, thus meeting the production requirements for progressive heat exchange of the gas, gas liquid separation and staged recover of the condensate.

The invention provides a condenser with a built-in oil separator. The condenser has the advantages that the structure is simple, the processing and manufacturing cost is low, and the like. The condenser with the built-in oil separator adopts a built-in oil separation assembly, the oil separator and the condenser are effectively and structurally integrated, a pressure container casing of one set of oil separator is omitted, the appearance dimension of an air conditioner refrigerating unit is greatly reduced, about 50 percent of welding processing workload is reduced, and possibly existing external leaking points of a system are further and greatly reduced. Through the adoption of a combined design of an air blocking plate and a third baffle plate, the flow rate of mixed gas entering the built-in oil separation assembly is effectively decelerated, so that the mixing gas is more uniform when passing through the filtering net plate group, the oil separation capability of the built-in oil separation assembly is effectively improved, meanwhile, a two-stage two-way filtering net oil separation structure is adopted, higher reliability is realized through being compared with that of a traditional built-in oil separator, and the oil separation efficiency can reach higher than 99.9 percent. Through the adoption of the designs of a convex separation plate, a fourth baffle plate and a fifth baffle plate, the heat exchange dead corner caused by the design of the built-in oil separator is greatly reduced. Compared with the traditional condenser with the built-in oil separator, the condenser provided by the embodiment of the invention has the advantages that the heat exchange efficiency is higher, and further, a higher energy efficiency ratio is obtained.

The invention provides a large-caliber heat-supply pipeline uncompensated cold mounting method, comprising the following steps: digging a groove for arranging a heat-supply pipeline, and filling sand into the groove; mounting the heat-supply pipeline and a corresponding pipeline accessory into the groove; carrying out backfilling on the groove; wherein, the direct-buried net depth of the heat-supply pipeline is more than 1.7m; the pipeline accessory comprises an elbow with a large bending radius, bevel angles, a three-way pipe, a tapered pipe, and a valve; wherein, the bevel angles comprise a plurality of small bevel angles smaller than 1 degree or the elbow the radius of which is more than 5.0DN can be used for replacing; moreover, the mounting method provided by the invention is led to be suitable for paving the heat-supply pipelines the main tubular diameters of which are more than DN1000 by the processing technology on each node of the pipeline; moreover, the invention is simple to be mounted, has short construction period, reduces the maintaining cost, and is safe and reliable.

The invention discloses a built-in rotary blade angle hydraulic pressure regulator. The hydraulic pressure regulator consists of three parts of a regulator main body which is also called as a rotating body, an encloser (i.e. a fixing body) and a control display system, wherein the regulator main body or the regulator rotating body is installed and fixed at the top end of a matching main motor shaft of a pumping unit and synchronously rotates along with the rotation of the main motor shaft, and keeps a relative static state to the rotating parts of the pumping unit and a main motor at any time; the encloser (i.e. the fixing body) is installed and fixed at the top end of a main motor shell and keeps an absolute static state to the main motor shell; the control display system comprises a PLC (programmable logic controller), a touch screen and a relay, has manual and automatic control functions as well as local and remote control systems and full-automatically regulates the angle of a water pump blade through the PLC, so that a water pump operates in an efficient area all the time; and load operation can be realized. The hydraulic pressure regulator is suitable to be used with various full-regulating axial flow pumps.

The invention discloses a normally closed semiautomatic gas emergency cut-off magnetic valve comprising a magnetic coil assembly, a valve cover assembly, a valve body and an open valve handle assembly, wherein the magnetic coil assembly and the valve cover assembly are mutually blocked and can be disassembled; the valve cover assembly is in threaded connection and fixed with a gas inlet cavity of the valve body, the gas outlet cavity of the valve body is provided with the open valve handle assembly, the open valve handle assembly is fixedly connected with a check ring, the check ring is in threaded connection with a mandrel, a flat seal film is sleeved on a lower lug boss of the check ring, and a spring is sleeved on the excircle of the mandrel; a circuit board and a coil frame are arranged in the magnetic coil assembly, a charging capacitor is arranged on the circuit board, and a coil is coiled on the coil frame; a permanent magnet and a built-in iron core are arranged in the valve cover assembly; when the magnetic valve is energized, the capacitor is charged; when the magnetic valve is deenergized, the capacitor releases electric energy to lead the coil to work in order to generate an electromagnetic field which has opposite polarity with a permanent magnetic field, and the magnetic force of the permanent magnetic field is weakened to lead the spring to push the mandrel and the check ring to move in order to close the valve. The normally closed semiautomatic gas emergency cut-off magnetic valve is easier to replace the magnetic coil for being separating from the permanent magnet, has low power consumption, can be automatically closed and manually opened only when deenergized, can automatically recover when energized, and improves the safety.

The invention relates to an integrated air braking device for rail vehicles, which comprises a brake integrated plate and a main valve, an emergency valve, a stopper valve, a check valve, a column pipe pressure sensor, a main air pipe pressure sensor, a brake cylinder pressure sensor and an auxiliary air cylinder pressure sensor mounted on the brake integrated plate. The brake integrated plate isalso provided with a train pipe interface, a working air cylinder interface, a brake pipe interface, an auxiliary air cylinder interface, a main air pipe interface, a brake cylinder interface and a living air pipe interface, and the brake integrated plate is internally provided with an air path to ensure the communication between each equipment of the air path plate. The device of the invention centralizes the function of the 104 distribution valve, and can brake the vehicle and alleviate the effect; the QD-G function can realize the conversion of single pipe and two pipes of the vehicle, andat the same time provide the wind demand for the auxiliary system of the vehicle; pressure sensors are also installed to detect the pressure in each piping when the vehicle is braked.

The invention relates to a bidirectional electromagnetic valve for automobile brake systems and belongs to the industry of automobiles. A fixed block is welded to a flux-insulating tube by laser welding. The flux-insulating tube is embedded into a valve body and welded to the body by laser welding. The valve body is fixedly connected with a valve seat by riveting. The lower end face of the valve body is connected with the upper end face of the valve seat. A bent edge of the valve body is connected with a riveting face of the valve seat. The lower end of a moving block is fitted in the valve body. The center of the moving block is provided with an axial stepped through hole; the lower end of the moving block is provided with a T-shaped groove. The moving block is in radial clearance fit with the flux-insulating tube. A piston is in radial clearance fit with a bore of the valve seat. A ring groove is in clearance fit with the T-shaped groove of the moving block. The bidirectional electromagnetic valve has the advantages that valve is simple in structure and easy to manufacture and assemble; when a valve circuit is broken, the valve keeps on, a valve opening has large diameter, the action upon throttling of fluid in a pipeline is not evident, and braking performance remains same during normal hydraulic braking; only one valve opening is provided, leaks are decreased, and operating reliability is improved.

The invention relates to a method for purifying a byproduct, namely hydrogen sulfide, during production of carbon disulfide by a methane method, and a method for comprehensively utilizing the byproduct. The method for purifying the byproduct comprises the following steps of: initially separating a mixture of desulfured products through a hydrogen sulfide distillation tower, and further purifying a gaseous phase product; performing two-stage condensation on a gaseous phase distillate at the top of the hydrogen sulfide distillation tower through a primary condenser and an ultimate condenser; and further purifying by using a refining feeding pot and a hydrogen sulfide refining tower so as to finally obtain the high-purity hydrogen sulfide. By adoption of constant-pressure two-level condensation, a lower condensation temperature can be reached to contribute to separation and elimination of inert gases in acidic gases, and the number of sets of equipment is decreased, the safety is enhanced and the equipment investment is reduced at the same time; meanwhile, by the methods, the minimum emission of waste gases and waste liquid during whole purification is realized, so the method is clean and environment-friendly.

The invention discloses a gas pressure regulator which comprises a valve body and a pilot valve, wherein a gas inlet channel and a gas outlet channel as well as a valve rod are respectively arranged in the valve body, the lower end of the valve rod is arranged between the gas inlet channel and the gas outlet channel, the gas outlet channel is connected with a gas tube, a spring is sleeved on the lower end of the valve rod, a skin membrane is arranged on the upper end of the valve rod and positioned in a cavity at the upper end of the valve body and used for dividing the cavity into an upper skin membrane cavity and a lower skin membrane cavity, the pilot valve is respectively connected with the gas inlet channel, the gas tube, the upper skin membrane cavity and the lower skin membrane cavity, a ventilating hole is arranged on the skin membrane, and the upper skin membrane cavity is communicated with the lower skin membrane cavity through the ventilating cavity. The invention has the advantage that the gas pressure regulator has lower use cost, reduces gas leakage points and is convenient for controlling flow.

The invention belongs to the technical field of fuel cells, and discloses a fuel cell hydrogen ejector and a hydrogen circulating system thereof. The fuel cell hydrogen ejector comprises a nozzle, anejector main body and a regulation and control main body, wherein the ejector main body comprises a suction chamber, a mixing chamber and a diffusion chamber which are communicated in sequence; a primary flow inlet for high-pressure hydrogen to flow in is formed in one side of the suction chamber, and a mixed gas outlet for mixed gas to flow out is formed in one side of the diffusion chamber; thenozzle is arranged in the suction chamber; the regulation and control main body is provided with a refrigerant channel and a mixed cooling channel; the refrigerant channel is used for circulation of arefrigerant; the mixed cooling channel is used for carrying out heat exchange cooling on high-temperature hydrogen and water vapor mixed gas discharged from a galvanic pile and a refrigerant; and themixed cooling channel is communicated with the suction chamber. According to the fuel cell hydrogen ejector, the temperature difference and the flow of the refrigerant are regulated and controlled, so that the condensation amount of water vapor can be controlled, the hydrogen proportion is controlled, and the amount of the hydrogen ejector is increased from integrated drainage.

The invention provides a basement construction dewatering and drainage device which mainly comprises a drainage pipe, a ventilation pipe, full-bore ball valves and a fixing pipe. The upper end of the drainage pipe and the upper end of the ventilation pipe are provided with the full-bore ball valves respectively. The drainage pipe and the ventilation pipe are installed on the fixing pipe. The fixing pipe comprises a steel pipe and a corrugated pipe. The fixing plate is provided with a sealing steel plate. The invention further provides a construction method of the dewatering and drainage device. The construction method comprises the steps that 1, a sump is arranged and filled with broken stone, and the corrugated pipe is buried in the sump; 2, the upper portion structure of the dewatering and drainage device is embedded into the upper end of the corrugated pipe; 3, a hose is installed, and the full-bore ball valves are opened for dewatering and drainage; 4, the full-bore ball valves are closed, and sedimentation post-cast strip pouring is carried out. The basement construction dewatering and drainage device has the beneficial effects that various problems produced when a basement bottom plate is affected by water pressure are effectively solved, construction requirements are met, the portion, at the position of the dewatering and drainage device, of the bottom plate can be poured together with a post-cast strip during closing, and the basement construction dewatering and drainage device is simple in structure, convenient to construct, economical, environmentally friendly, safe and reliable.

The invention discloses a device and process for recovery of low-grade waste heat of a rectification system. The device comprises a rectification tower, a tower top evaporation condenser, a raw material preheater, a tower kettle reboiler and a waste heat recovery system, wherein the waste heat recovery system comprises an intermediate heat-exchange working-medium vaporization device and a workingmedium compressor, all the tower top evaporation condenser, the raw material preheater and the tower kettle reboiler are heat exchangers, and an intermediate heat-exchange working medium is introducedinto a cold fluid inlet of the tower top evaporation condenser; a cold fluid outlet of the tower top evaporation condenser is connected with an air inlet of the working medium compressor through theintermediate heat-exchange working-medium vaporization device by using pipelines, an air outlet of the working medium compressor is connected with a hot fluid inlet of the tower kettle reboiler by using pipelines, and a hot fluid outlet of the tower kettle reboiler is connected with a hot fluid inlet of the raw material preheater through a pipeline; and the intermediate heat exchange working medium which is obtained after cooling is performed through heat exchange is discharged from the hot fluid outlet of the raw material preheater. The device has a simple structure, and low-grade heat of steam in the tower top of the rectification tower can be recovered effectively through the device.

The invention relates to an ultralow-temperature tool-aid-type fixing ball valve and an assembling method of the ultralow-temperature tool-aid-type fixing ball valve. The ultralow-temperature tool-aid-type fixing ball valve and the assembling method of the ultralow-temperature tool-aid-type fixing ball valve resolve the technical problems that an existing installation method of a valve seat adopts a thread screwing structure, the structure is difficult to screw and threads are damaged easily after multiple times of detachment and installation. A tool is used for putting a supporting ring, a left valve seat component and a right valve seat component into valve seat holes, a ball body is put into a valve cavity when the valve is in an open state, and the ball body is rotated by 90 degrees so that the valve can be in a closed state. A tool is used for opening the supporting ring to expose a positioning part of the left valve seat component and a positioning part of the right valve seat component, then the elastic supporting ring is fixed through a fixing process hole in the elastic supporting ring and the tool, and the tool used for opening the supporting ring is removed. A tool is used for clamping a positioning ring into the positioning parts of the valve seat through the tool, the split open positioning ring is fixed through a positioning plate, and then the tool used for fixing the elastic supporting ring is removed. Through the tool-aid structure and method, the installation method of the valve seat is changed, the traditional thread screwing type structure is changed into a stretchable installation structure, damage to the threads caused by multiple times of installation is avoided, multiple times of on-line detachment and installation on site can be achieved, and repairing is convenient.

The invention belongs to a pressure system overpressure protection technology, and particularly discloses an all-metal-sealed pilot-type safety valve. The all-metal-sealed pilot-type safety valve is composed of a main valve, a pilot valve and a switcher. The pilot valve is connected with a main valve inlet and a switcher inlet. The switcher is connected with a pilot valve inlet, a main valve air chamber and a main valve outlet. A main valve seat is fixed to a main valve body. A main valve flap is connected with a piston in a threaded manner. After a main valve guide sleeve and the main valve body are mounted, a cover plate is connected with the main valve body through a bolt. A valve deck is fixed to a pilot valve body through a thread. A guide valve spring is located in the valve deck and directly acts on a valve shaft. A valve bonnet is fixed to the portion above the valve deck. The valve flap of the main valve is opened or closed in the horizontal direction. Main valve main seal is only the seal between the valve seat and the valve flap. The possibility of leakage to the outlet from the main valve air chamber is avoided effectively, and possible leakage points of the valve are reduced to the maximum. The sealing ring structure design is adopted between the main valve guide sleeve and the valve flap. The problem about movable seal of the piston at the high temperature is solved.

The invention discloses a multifunctional cover for a diesel engine, which is in an integral forming structure. The upper part of the cover is provided with ports which are used for connecting with engine oil filter attachments and engine oil cooling attachments; the inside of the cover is provided with channels, which are communicated with associated ports, according to the medium circulation relation; in the height direction, the channel set composed of all the channels is in a layered arrangement structure; the integral middle lower part of the cover is in a bilateral symmetry structure; the middle lower part of the bilateral symmetry structure is provided with a first installation structure part which is used for installing a gear system and a configured shock absorber; each of the two sides of the first installation structure part is orderly provided with a second structure part, a third structure part and a fourth structure part from bottom to top; the second structure part is used for installing an engine oil pump; the third structure part is used for installing a cooling water pump; and the fourth structure part is used for installing a thermostatic valve corresponding to the cooling water pump. The invention has compact structure and simplifies the installation of attachments on the shell of the diesel engine.

The invention discloses a refrigerant recycling machine, and provides a portable low-leakage refrigerant recycling machine which is compact in structure, fewer in leak points, low in cost and high in quality and performance stability, which solves the technical problems of the prior art that the connection pipeline is easy to leak, the purchase cost and the assembling cost are high, the overall size is large, and the like. The portable low-leakage refrigerant recycling machine comprises a shell and a compressor which is arranged in the shell, wherein one end of the compressor is provided with a fan, the other end of the compressor is provided with a condenser, an air cylinder cover of the compressor extends to be provided with an integrated control valve, the integrated control valve is provided with a condenser pipeline interface which is in butt joint with the condenser as well as an input interface and an output interface extending out of the shell, a plurality of inner pipeline passages are arranged in the integrated control valve, and the input interface and the output interface are communicated with an air cylinder of the compressor and the condenser through the inner pipeline passages.

The invention provides a micro heat exchanger with a small hole throttling function. The micro heat exchanger can serve as an evaporator or a condenser and is a solid formed by laminating five different kinds of etching plates in a certain sequence and welding the etching plates through vacuum diffusion welding. The micro heat exchanger comprises an interface plate A, a refrigerating fluid throttling plate B, one or more fluid heat exchange plates C, one or more refrigerating fluid heat exchanger plates D and a blind plate E. A small throttling hole is formed in the refrigerating fluid throttling plate B, throttling depressurization can be performed on refrigerating fluid when the refrigerating fluid flows through the small hole, throttling and phase-change heat exchanging of the refrigerating fluid can be achieved through one device, throttling elements such as capillary tubes, throttling short tubes and the like are eliminated, and quantity of external connection tubes and welding points is reduced. The micro heat exchanger with the small hole throttling function is compact in structure, small in size and capable of reducing volume and mass of the system when applied to a micro vapor compression refrigerating system.

The invention discloses a vehicle air conditioner double pressure switch which comprises a shell and a pressure chamber. The vehicle air conditioner double pressure switch is characterized by also comprises a plastic membrane, a high-pressure membrane, a low-pressure membrane, an insulating transmission rod, a pressure control panel, a movable terminal pin and a stationary terminal pin, wherein the movable terminal pin and the stationary terminal pin with relative positions are arranged inside the shell; the plastic membrane is arranged at the inner side of the bottom of the shell, and the plastic membrane is connected with the high-pressure membrane at the top of the plastic membrane; the top of the high-pressure membrane is provided with the pressure control panel for controlling the opening and closing of the movable terminal pin and the stationary terminal pin; and the low-pressure membrane is arranged at the bottoms of the movable terminal pin and the stationary terminal pin, and the bottom of the low-pressure membrane is provided with the pressure control panel. The invention overcomes the defects of complex installation structure and easiness in causing refrigerant leakage existing in the traditional vehicle air conditioner pressure switch and provides a vehicle air conditioner double pressure switch with novel structure.

The invention discloses a multistage water purifier capable of conveniently replacing filter elements. The multistage water purifier comprises a machine body and filter element cylinders, wherein insertion holes, a raw water inlet and a purified water outlet are formed in a base of the machine body; each filter element cylinder is inserted in each insertion hole; a water inlet column and a water outlet column are arranged in each insertion hole; a filter element water inlet hole and a filter element water outlet hole are formed in the lower end of each filter element cylinder; water locking components are arranged in the water inlet columns, the filter element water inlet holes, the water outlet columns and the filter element water outlet holes; when the water inlet columns and the water outlet columns are respectively inserted into the filter element water inlet holes and the filter element water outlet holes, two groups of water locking components are opened, so that a water channelis penetrated, and all the filter element cylinders are connected in series on the water channel. The multistage water purifier is capable of preventing the residual water from flowing out when replacing the filter elements and is also capable of preventing the inflow water and the outflow water of the filter elements from mixing during purifying water and preventing the water from leaking from filter element joints at the same time.

The invention discloses an unconventional gas liquefaction system based on a spiral wound heat exchanger. The liquefaction system comprises the spiral wound heat exchanger, a fuel gas heat exchanger, a heavy hydrocarbon heat exchanger and a mixed refrigerant circulation mechanism. The mixed refrigerant circulation mechanism comprises a primary mixed refrigerant compressor and a primary mixed refrigerant compressor cooler, wherein the primary mixed refrigerant compressor and the primary mixed refrigerant compressor cooler are sequentially connected. The fuel gas heat exchanger, the heavy hydrocarbon heat exchanger and a pre-cooling section of the spiral wound heat exchanger are sequentially communicated with one another, and an outlet of the pre-cooling section of the spiral wound heat exchanger is communicated with the heavy hydrocarbon heat exchanger. A qualified component outlet of the heavy hydrocarbon heat exchanger is communicated with a liquefaction section of the spiral wound heat exchanger, an outlet of the liquefaction section of the spiral wound heat exchanger is communicated with a low-temperature rectifying tower and a super-cooling section of the spiral wound heat exchanger, an outlet of the super-cooling section of the spiral wound heat exchanger is communicated with the low-temperature rectifying tower, and the bottom portion of the low-temperature rectifying tower is communicated with an LNG storage tank. The spiral wound heat exchanger is adopted as a main heat exchanger and has the advantages of being firm in structure, allowing a runner not to be easily blocked, being less in leakage point and allowing large-temperature-difference heat transmission in comparison with a louvered fin heat exchanger.

The invention discloses a pilot-operated type electromagnetic valve in a bottle opening valve. The upper segment of a valve body is connected with a valve cover with a sealing structure, a sliding channel and a connecting through hole are formed in the top face of the valve body, a sliding valve element is arranged in the sliding channel in a penetrating manner, a connecting hole and a pilot holeare formed in the top face of the sliding valve element, a fixed iron core abuts against the valve cover, the lower segment of the fixed iron core is fixed to the top of the sliding channel through aconnecting sleeve, an electromagnetic coil is arranged in the fixed iron core, the connecting sleeve and the valve cover, a movable iron core composed of a first movable iron core and a second movableiron core is arranged in the connecting sleeve, the second movable iron core is inserted into the connecting hole, the top of a sleeve is clamped and embedded in an annular clamping groove in the side wall of the first movable iron core through a clamping plate, the bottom of the sleeve is blocked below a shaft ring of the top end of the sliding valve element through an annular baffle, a spring is arranged between the fixed iron core and the movable iron core, and multiple small holes used for penetrating through the side wall of the bottom of the connecting hole are formed in the side wall of the sliding valve element at intervals. The structure is simple and compact, and seal performance is good.

The invention relates to a method for processing a butterfly plate device of a butterfly valve body. The butterfly plate device comprises a butterfly plate, a butterfly plate axle hole, a main shaft section, a connecting plate shaft section and a fixed shaft section, wherein butterfly plate is made by stamping or casting; the radial concentric rectangular butterfly plate axle hole is formed in the center line of the butterfly plate; the connecting plate shaft section is arranged in the rectangular butterfly plate axle hole; a valve rod of a butterfly valve is divided into three sections in a coaxial way; on a lathe, a cylindrical steel bar is turned into the cylindrical main shaft section and the connecting plate shaft section, and the diameter of the cylindrical steel car is larger than the diagonal length of the butterfly plate axle hole; the diameter of the fixed shaft section is smaller than the length of the rectangular straight side of the butterfly plate axle hole; the connecting plate shaft section is planed on the cylindrical valve rod of the butterfly valve, and the cylindrical valve rod of the butterfly valve is fixed on a planer; the valve rod of the butterfly valve is planed into a corresponding rectangle smaller than the butterfly plate axle hole and then is installed into the butterfly plate axle hole. The design is reasonable; the butterfly plate axle hole is designed into a square shape, the square connecting plate shaft section corresponds to the butterfly plate axle hole, and the valve rod is closely matched with the butterfly plate, so that a fixing pin is not needed for fixing, water leakage point positions and sliding pins which are caused during processing and manufacturing can be reduced, the butterfly plate device is firm and durable, and the service life is prolonged.

The invention discloses a top-mounting fixation ball valve. The ball valve comprises valve seats, a valve body, a valve ball, a valve rod and a handle. An inflow channel, an outflow channel and a valve cavity communicating the inflow channel and the outflow channel are formed in the valve body. The valve ball is arranged in the valve cavity and is supported on the valve body through a left valve seat and a right valve seat. The valve body is forged integrally, a valve rod hole for the valve ball to penetrate is formed in the valve body and is covered with a valve bonnet in seal connection with the valve body, a press sleeve flange in seal connection with the valve bonnet is arranged on the valve bonnet, an ejection flange in fixed seal connection with the press sleeve flange is arranged on the press sleeve flange, and the valve rod penetrates the valve bonnet, the press sleeve flange and the ejection flange through the valve rod hole to be in transmission connection with the handle. The valve bonnet, the valve ball and the valve seats are mounted and dismounted through the valve rod hole in the upper portion of the valve body. According to ball valve, pipe stress is not applied, valve body leakage points are reduced, and the medium leakage probability is reduced.

The invention discloses a packer for intelligent well completion. The packer comprises a main pipe body, wherein a rubber tube sealing mechanism for expansion seat sealing and a slip anchoring mechanism for anchoring are sleeved on the main pipe body; and a main channel axially penetrating through and a plurality of parallel pipe cable bypass channels are arranged inside the main pipe body. The lower end of an inner cylinder of the rubber tube is connected with an elastic unsealing claw which is sleeved on the main pipe body and slides relative to the elastic unsealing claw; the rubber tube inner cylinder, the elastic unsealing claw and the main tube body form a built-in thrust structure; a contacted part between the main pipe body and the elastic unsealing claw takes the shape of a conical of which the diameters are reduced from top to bottom; when the packer is positioned in a seat sealing state, the elastic unsealing claw expands in the radial direction; and when the packer is positioned in an unsealing state, the elastic unsealing claw is folded in the radial direction. According to the packer disclosed by the invention, the requirement that a plurality of pipe cables pass in the intelligent well completion process can be met; and the packer has the advantages of favorable sealing effect, firmness in seat sealing, smoothness in unsealing, simple structure, convenience for use and capability of being reused.

The invention relates to a gas nuclear reducing valve. Two stages of reducing valve units, the first-stage reducing valve unit and the second-stage reducing valve unit, are arranged on a valve body. An inlet cavity is arranged on one side of the valve body, and an outlet cavity is arranged on the other side of the valve body. The inlet cavity communicates with the first-stage reducing valve unit,and the outlet cavity communicates with the second-stage reducing valve unit. A first-stage reducing valve and a second-stage reducing valve are in communication through a runner d. A high-rigidity spring is adopted by the first-stage reducing valve unit, and the high pressure is rapidly roughly adjusted to the intermediate pressure value. A high-precision and low-rigidity spring is adopted by thesecond-stage reducing valve unit, and the outlet pressure is stabilized at the set value. Unit design is adopted by a two-stage reducing device, offline overall assembling can be achieved, and replacement and maintenance are convenient. Due to the fact that horizontal left-and-right arrangement is adopted, the vertical mounting space is saved, and the working condition requirements are met. The reducing valve adopts the flow-to-open type structural design, and the situation that the reducing valve is completely closed in a failure state is avoided.

A fuel cell system having a hydrogen supply manifold according to an exemplary embodiment of the present invention may include a stack that uses air and fuel gas, which is supplied, to generated electricity, a recirculation line that recirculates a fuel gas, which is partially used by the stack to be exhausted, to an inlet of the stack, and an ejector unit that is disposed on the recirculation line, supplies fresh fuel gas, and circulates the recirculated gas, wherein the ejector unit may include a middle pressure manifold where a nozzle mounting portion is formed at one side and a supply passage is formed to transmit fuel gas to the nozzle mounting portion, a control valve that is disposed on the middle pressure manifold to control fuel that is supplied to the stack, a nozzle that is engaged with an end portion of the nozzle mounting portion to injects fuel gas that is supplied through the supply passage, and a low pressure manifold that is engaged with the middle pressure manifold, a chamber is formed to house the nozzle mounting portion and the nozzle, a venture and a diffuser is formed in a direction that the fuel gas is injected from the nozzle, sucks exhaust gas of the stack and mixes the exhaust gas and the fuel that is injected from the nozzle through the venture and the diffuser.

The invention discloses an integrated cylinder valve suitable for 70 MPa high-pressure hydrogen, and relates to the technical field of high-pressure hydrogen integrated cylinder valves. The integratedcylinder valve is characterized in that a main channel, a branch channel I and a branch channel II which sequentially communicate are arranged in a cylinder valve body, a manual stop valve is arranged in the main channel, and the manual stop valve is used for controlling the communication state between the main channel and the branch channel I; a solenoid valve main valve is arranged in the branch channel I, the solenoid valve main valve is used for controlling the communication state of the branch channel I, a pilot-operated type solenoid valve communicates with the solenoid valve main valvethrough a gas pipeline, the gas pipeline is connected with the branch channel I in parallel, and a filtering overflow valve is arranged in the branch channel II; and a TPRD bleeding device is arranged at the top of the cylinder valve body, and the TPRD bleeding device is arranged in a bleeding channel penetrating through the cylinder valve body. The integrated cylinder valve suitable for the 70 MP high-pressure hydrogen is of a miniaturized and highly-integrated type electromagnetic cylinder valve, has multifunctional performance, can reduce the cost of a whole vehicle, and reduces leakage points which are increased due to the fact that the valves are independent.