314results about How to "Avoid leakage hazards" patented technology

The invention discloses a cross-trust-domain authentication method used for a distributed network system. According to the method, a distributed secrete key generation and threshold signature mechanism based on an elliptical curve cryptosystem is adopted to construct a virtual bridge authentication center (VBAC), and cross-domain interaction authentication between different trust domain entities in the distributed network system is completed through the VBAC. The cross-trust-domain authentication method has the advantages of being universally applicable to various organization structures, agile, dynamic, low in cost, short in authentication path, high in bit safety, high in efficiency and the like, in addition, the method can be realized by hardware easily, can easily solve the problem of cross-domain interaction authentication between the different trust domain entities of the dynamic distributed network system under the condition that terminal resources or the communication bandwidth is limited, and has wide application prospects in cloud computation, a cloud storage network, the internet of things, a wireless sensor network, an agile manufacturing system and a virtual organization.

The invention provides an overhanging type outer scaffold which comprises an outer scaffold body, the outer scaffold body is fixed to the outer side of a building outer wall through wall connecting pieces, and the wall connecting pieces comprise a first wall connecting piece, a second wall connecting piece and a third wall connecting piece. Compared with a traditional overhanging scaffold construction technology, the construction method has the advantages that by means of the construction method of embedded connecting steel plates on beams and fixing I-shaped steel, the problems that the overhanging scaffold has large requirements for I-shaped steel materials, and an embedded wall connecting rod is difficult to control on the aspect of parallelism and construction hole residues are solved.The embedded connecting steel plates do not affect masonry construction, the hidden danger of leakage caused by the fact that holes are reserved during masonry and the potential safety hazard causedby the fact that wall connecting rods are dismantled during worker construction are reduced, and the influence on the building structure is small. An overlong I-shaped steel material does not need tobe arranged to be fixed in a building, materials are saved, and the construction cost is saved. The problem that the parallelism of the embedded wall connecting rods is difficult to control is avoided, the construction efficiency is improved, and the construction period is shortened.

One or more embodiments of the specification provide a block chain-based logistics distribution method, system and device. The block chain includes a plurality of node devices corresponding to a logistics delivery sites and logistics distribution sites, the method includes the following steps: a logistics delivery site receives logistics information which includes user receiving address information, a secret key related with a public key of a distribution site is utilized to encrypt the logistics information to obtain encrypted logistics information, wherein the distribution site is one determined according to the user receiving address information, and the encrypted logistics information is sent to a distributed account book of the block chain; and the logistics distribution site obtainsthe encrypted logistics information from the distributed account book of the block chain, uses a secret key related with a private key of the distribution site to decrypt the encrypted logistics information to obtain the logistics information, and distribution is performed based on the logistics information.

The invention relates to a modular multifunctional roof greening device, which is assembled by a base plate arranged on the top surface of the roof, a hollow communicating pipe, a strip clamp and a cross clamp; hollowing footings are distributed evenly at the bottom of the base plate, and reinforcing ribs are arranged on the inner wall and the soleplate of the base plate; the middle part of the base plate is provided with a square groove which is communicated with draining holes at the four sides of the base plate; a portal cover plate is sheathed and inserted at the upper end of the square groove, the two sides of which are provided with an overflow hole and card slots arranged at the two sides of the overflow hole; a filtering box is inserted in the card slot; and a slot used for placing a water level regulating board is arranged in the square groove. The modular multifunctional roof greening device has simple manufacture and fast construction, can be used for planting flowers, grass and trees, etc., has high survival rate of plants, obvious water-saving and convenient maintenance and management, can be used for greening of the roof, can also be used for room greening and stereoscopic agriculture, etc. and has multiple actions of protecting the roof of buildings, greening the city space, insulating heat, keeping the temperature, preventing water and collecting and using the rainwater.

The invention discloses a rough crack changing opening degree for a visualization experiment and a manufacture method thereof. The transparent rough crack comprises transparent rough crack upper and lower trays, a crack space between the rough crack upper and lower trays, upper and lower edge baffles at two sides, a rigid gasket with specific thickness, a reserved water stop cavity, and so on. Themanufacture method comprises following steps of: acquiring an original rough crack by cleaving a square rock, and copying to obtain the transparent rough crack upper and lower trays; customizing upper and lower edge water stop baffles with specific size and structure; fixing the upper and lower edge baffles at two sides at two sides of the crack upper and lower trays from bottom to top; and adding a rigid gasket with specific thickness between the upper and lower edge baffles according to needs, so as to change average crack opening degree. The method is easy to operate, has good repeatability and high accuracy, and delivers reliable, accurate average opening degree of the rock rough crack.

A toilet seat contains: a toilet seat, a connecting assembly, a body, and a fixing plate. The toilet seat includes a support, a holder, and a cover; the support has an electronic controlling element, at least one inlet pipe, and an electric wire. The connecting assembly is connected with the support and includes an elongated affix piece, a retaining member, and a pressing member; the affix piece has two penetration portions and two recesses. The retaining member has two cutouts defined on two ends thereof to correspond to the two penetration portions and has two locking portions proximate to the two cutouts. The body includes two accommodating orifices and two connection orifices. The fixing plate is mounted on the two connection orifices and includes two opposite lockers extending outwardly therefrom and inserting through the two penetration portions and the two cutouts to retain with the two locking portions.

The invention relates to a construction method and a double-layer formwork structure for a cast-in-situ slope roof. The double-layer formwork structure comprises a supporting rod system, a formwork keel, a bottom formwork, a surface formwork and counter-pull positioning waterproof bolts. The bottom of the formwork keel is fixedly supported by the supporting rod system; the bottom formwork is laid on the upper surface of the formwork keel, the surface formwork is parallel to the bottom formwork, and a distance between the surface formwork and the bottom formwork is equal to the thickness of a concrete pouring layer of the slope roof; the bottom formwork and the surface formwork are positioned through the counter-pull positioning waterproof bolts; the surface formwork is formed by a plurality of segmented surface formworks at intervals, and a trough formed by ends of the adjacent segmented surface formworks and the bottom formwork serves as a vibration tamping trough for segmented pouring of concrete. By adoption of the double-layer formwork structure and a segmented concrete pouring and vibration tamping method, the problem of proneness to slipping of concrete in construction of the slope roof is solved, structural compactness, high section size precision and high surface quality of concrete after pouring and tamping are achieved, and the construction method is simple and feasible.

The electric vegetable cutting machine includes a vegetable cutter, a driving device to drive the cutter to reciprocating, a container with horizontal rail in the inner wall and a cutter holder on the rail and connected to the cutter. On the container, there are a detachable cover, a hopper in the cover and communicated to the container, and an extruder inside the hopper. The driving device installed detachably on the cover includes a casing, a motor, a switch, a gear set and a crank-slider mechanism with slider connected to the cutter holder. The crank-slider mechanism converts the rotation of the gear set into the horizontal linear motion of the slider to drive the cutter to cut vegetable stably.

A glass heating kettle with a far infrared heating film comprises a glass kettle body and a control base, a heating layer is arranged on the bottom of the glass kettle body, and a control circuit board is arranged in the control base. The glass kettle body is formed and is made of high borosilicate glass, a resistor heating layer is arranged on the bottom of the glass kettle body through the silk-screen technology that electrothermal film pulp is printed on the bottom of the glass kettle body, and two electrode layers are coated on the surface of the heating layer and are used as conductors. The control circuit board comprises a circuit control module, a PWM direct-current output module and a detection control module. According to the glass heating kettle with the far infrared heating film, a PWM direct-current control circuit is adopted, and the power input of a glass heating part is guaranteed to be stable in heating operation. The output power of the circuit control part is output in a slowly rising and stepped manner within a certain time at the beginning, a relay is used as a switching element, and an electric supply is rectified, and then a direct-current power supply isseparated from a load interface completely. The glass heating kettle with the far infrared heating film solves the problem that electricity is leaked caused by the fact that heated liquid is leaked from partial breaks of the glass kettle heating body when the glass kettle is powered directly. The glass heating kettle with the far infrared heating film solves the problem of the potential safety hazards when the existing glass kettles are used.

The invention relates to an environment-friendly direct drinking water machine which can recycle all sensible heat; during the process that upper water is heated to 100-200 DEG C for sterilizing to become drinking water, a closed-circuit caloric content cycle, which is formed by 1-40 DEG C small temperature difference heat exchange technology, is adopted for producing the drinking water, the temperature of which is higher than that of the upper water by 1-40 DEG C, and 50-99% of sensible heat is recycled in total; therefore, only by compensating 1-50% of sensible heat loss and heat loss in the systemic circulation through heating, 20-1000 liters of drinking water can be produced by one kwh of electricity, the coefficient of performance of the drinking water machine can reach 80, which is 100 times of the traditional electric kettle for boiling water (100 DEG C); therefore, the drinking water machine is the most energy-saving product in the world in the 21st century.

The invention discloses a plastic electric-spraying throttle valve body assembly, comprising a throttle valve body (1), a throttle valve spindle (2), a throttle valve piece (3), a torsion spring (4), a swing frame (5), a position sensor (6), a stepping motor (7), a flange plate metal insert (10), an idle screw mounting hole metal insert (11), stepping motor and position sensor mounting hole metal inserts (12), a card (14) and an idle adjusting screw (17), wherein a main channel (8) and an idle side channel (9) are arranged inside the throttle valve body (1), and a base of the throttle valve body (1) is provided with a flange plate (18). The plastic electric-spraying throttle valve body assembly has the beneficial effects that the defect of easy deformation of the main channel of the plastic throttle valve body can be effectively overcome, the fast interchange of a metal throttle valve body assembly and a plastic throttle valve body assembly in the process of assembly and after-sale maintenance of an engine is realized, and the leak problem of the side channel of the throttle valve body caused by different coefficients of thermal expansion is solved.

The invention discloses a light emitting diode (LED) bulb and aims to provide the LED bulb which has high anti-shock performance and high radiating performance and is convenient to install and maintain. The LED bulb of the invention comprises a lamp shade, a radiator, an aluminum base, an LED, a circuit board, a connecting piece and a lamp holder, wherein the lamp shade is connected with the radiator; the radiator is connected with the connecting piece; the connecting piece is connected with the lamp holder; the LED is welded on the aluminum base; a cavity is reserved in the radiator; the opening of the cavity is upward; a sheath is arranged in the cavity of the radiator; hooks are arranged at the positions corresponding to the lower end of the sheath and the lower end of the radiator so as to form a fastener structure; and the sheath and the radiator can be connected with each other through the fastener structure. The LED bulb has high anti-shocking performance and radiating performance, is convenient to install and maintain, and is a regeneration product of the convention LED bulb.

The invention discloses an underwater dam slope hidden danger detection vehicle. According to the underwater dam slope hidden danger detection vehicle, a detection device with idler wheels is connected with a corresponding rope drum of a winding-unwinding control device through a sampler closing lifting rope with meter marks, and the detection device is also connected with a corresponding rope drum of the winding-unwinding control device through a detection device traction lifting rope with meter marks. The underwater dam slope hidden danger detection vehicle can timely discover and detect the problems and hidden dangers existing in a dam slope on the condition that the underwater dam slope is unfavourable for detection, can conduct accurate positioning on the hidden dangers of the underwater dam slope, and brings convenience to subsequent maintenance. The underwater dam slope hidden danger detection vehicle can effectively confirm the positions and heights of the underwater silt and sludge of a dam, and conducts sampling and analysis. In addition, the underwater dam slope hidden danger detection vehicle needs no electric power or other external force, is suitable for detection of hidden dangers of dams in the wild places without power or small-scale earth-rock dam slopes, and is safe and reliable to use.

The invention discloses an ultra-long concrete wall body structure and a method for controlling structural cracks by constructing a wall body. The ultra-long concrete wall body structure comprises a wall body, wherein cutting steel plates (3) are arranged on a concrete inner core layer (2) arranged between two layers of steel bar nets (1) of the wall body in the length direction of the wall body at certain intervals; the continuous concrete inner core layer (2) arranged between two layers of steel bar nets (1) is cut into concrete inner core units (4) by the cutting steel plates (3); a plurality of horizontal connecting steel bars (5) in different heights are welded on each cutting steel plate (3); two ends of each connecting steel bar (5) are provided with bending sections (5.1); and the two bending sections (5.1) of each connecting steel bar (5) are respectively welded with horizontal steel bars (1.1) of the two layers of steel bar nets (1). The method comprises the key step that the cutting steel plates (3) are arranged in the length direction of the wall body at certain intervals. The structure and the method disclosed by the invention have the advantages that the effective control can be realized on the structural cracks, and harmful cracks can be eliminated.

The invention provides a mounting method of a precast air duct during the construction stage of a construction engineering structure. According to the method, original procedures are changed, the air duct mounting operation is performed after main structure wall construction, and the air duct mounting operation and the top plate template mounting are performed together, each procedure in the existing construction method is omitted, synchronous air duct mounting and main structure construction progress can be achieved on the premise of not increasing construction materials and working hours, and the waterproof construction progress and quality of a roof are better ensured.

The invention relates to an upper-mounting-type hydraulic ball valve which comprises an upper valve rod, a valve cover, a valve body, a lower valve rod and a valve seat assembly; the valve seat assembly is installed between the valve body and a central ball valve body; two sides of the valve body are respectively provided with the upper valve rod and the lower valve rod; the valve cover is installed at the part of the lower side of the upper valve rod; the clearance parts of the valve seat assembly, and the upper side and the lower side of an outer valve body are respectively provided with a grease injection hole II and a grease injection hole I; and one side of the grease injection hole II is provided with a screw plug hole. The invention has the beneficial effects that a hydraulic piston motion principle is adopted, the ball valve has a stable structure, the hazard of valve body leakage is avoided, the dismounting issue of the upper-mounting-type ball valve can be solved thoroughly with the minimum difficult, and the on-line maintaining requirement is realized; and the simple batch production of valves with large and small calibers and high and low pressure can be realized, the existing similar products can be replaced completely, and the ball valve has wide market potentiality.

The invention relates to the technical field of refrigerators and provides a refrigerator body manufacturing process. The refrigerator body manufacturing process comprises the steps of prefabricating components and parts, splicing and sealing the components and parts to form a refrigerator casing, filling a foaming material into the refrigerator casing and performing a foaming work procedure to manufacture a refrigerator body. The components and parts include a condenser, an evaporating pipe, a refrigeration inner container, a freezing inner container, an outer casing, a back plate, a base plate, a middle cross beam, a lower cross beam, a dew removing pipe and a drainage pipe. The refrigerator body manufacturing process is characterized in that a freezing evaporator and a refrigeration evaporator form a non-welded one-piece communicating pipe, and accordingly leakage of a refrigerant in the refrigerator body can be effectively avoided, and has the advantages of being simple in operation, high in finished product rate and low in manufacturing cost.

The invention discloses an invisible electric mouse killer. The invisible electric mouse killer comprises an electric mouse killing gasket and a switching gear, wherein the electric mouse killing gasket comprises an installation frame, positive conductive wires and negative conductive wires; the switching gear is communicated with the positive and negative conductive wires; the installation frame comprises an insulated bottom cushion and left and right insulated supporting assemblies which are fixed on the left side and the right side of the insulated bottom cushion; the positive conductive wires and the negative conductive wires are transversely arranged between the left insulated supporting assembly and the right insulated supporting assembly in a pulling manner and are adjacent to each other; each of the left insulated supporting assembly and the right insulated supporting assembly comprises a plurality of insulated installation bases which are arranged in row along the length direction of the insulated bottom cushion and distributed at intervals; and each two adjacent insulated installation bases are arranged in a left-right staggered manner. According to the invisible electric mouse killer disclosed by the invention, the characteristic that the vision of a mouse is poor is utilized, and the positive and negative conductive wires, which cannot be seen by the mouse, are arranged on the insulated supporting assemblies in a pulling manner for forming high-voltage potential difference between each two adjacent positive and negative conductive wires, so that the mouse can be effectively and safely killed and the mouse killing efficiency is high. Therefore, the invisible electric mouse killer has great prospect in practical application and popularization.

The invention discloses a method for preventing an oil-string casing of an oil-water well from moving upward, pertaining to the oiling field of the oil-water well. The method comprises the following steps: pulling out a production pipe column of the oil-water well, carrying out scraping operation on the oil-string casing and utilizing a sealing pipe column with a packer to pack casings below the construction segment in the oil-string casing; labeling the upward-moving height of the oil-string casing of a well mouth of the oil-water well as X meter, re-defining the position spacing from the top end of the oil-string casing by X meter as the screwing-on position of the oil-string casing; labeling the height of a casing cutting machine as Y meter, utilizing the casing cutting machine to cut surface-layer casings within the range of Y meter below the screwing-on position, then cutting oil-string casings above the screwing-on position, re-machining casing threads, then sealing the oil-string casing and sealing annular space among the surface-layer casings and the oil-string casing; and releasing the packer, re-securing the oil-string casing at the well mouth, recording cutting lengths of the surface-layer casings and the oil-string casing and pulling out the sealing pipe column. The method for preventing the oil-string casing of the oil-water well from moving upward has a good preventing effect and can be used for a long time.

The invention provides a gas cooker and a control method thereof. The gas cooker comprises a burner, a fire cover, a color sensor and a reflection piece, wherein a fire hole communicated with a gas injection channel on the burner is formed in the fire cover, so that gas is sprayed from the fire hole to form a flame; the color sensor is positioned at the bottom of the burner; an avoidance channel is arranged between the color sensor and the fire hole; a reflection surface is arranged on the reflection piece and is used for reflecting the color of the flame to the color sensor by the avoidance channel so as to detect the color of the flame; the melting point of the reflection piece is higher than the temperature of the flame generated by burning of the gas. The gas cooker provided by the invention is used for detecting the color of the flame by the matching of the color sensor and the reflection piece to detect whether the flame is put out abnormally in real time, and further a user can be reminded in time when the gas leaks, so that the occurrence of potential safety hazards is avoided; the detection speed is high, the detection is precise, and the problem that the color sensor can not resist high temperature, so that the color of the flame and the leakage of the gas can not be detected by the color sensor is overcome.

The invention discloses a novel cable conveyor. The cable conveyor structurally comprises a conveyor, a clamping column, a rolling shaft and a motor. The conveyer is in bolted connection with the upper side of the motor. The clamping column is welded with the outer side of the motor. After the cable enters the conveyor, the clamping belt is used for fixedly conveying the cable. In a conveying process, the spring supported by the abutting plate abuts against the touch plate to protect and convey the cable, the reduction of the molecular structure activity of the rubber material of the cable insulation layer in cold air is prevented. Deformation is caused in the conveying process, so that cracks are generated in the insulating layer, and the insulativity of the cable is reduced. In the cableconveying process, the cushion plate tightly wraps the cable under the matching of the connecting shaft and the middle connecting shaft, the deformation of the supporting blocks increases the contactarea of the cable, reduces the unit area stress of the insulating layer, prevents the loosening deformation and even breakage of the insulating layer outside the cable caused by excessive traction, guarantees the insulation of the cable, and prevents the risk of electric leakage.

The invention provides a copper pipe section drawing device for solving the problems, such as leakage points, deformation, breakage, rough appearance and thick pipe wall, which easily occur in a traditional copper pipe section drawing device. The device comprises a bracket and a drawing die on the bracket, wherein the drawing die is connected with the bracket through a sliding rail on the bracket; the sliding rail is fixedly connected with the bracket; a cylinder is arranged on the other side of the sliding rail; a barrel of the cylinder is fixedly connected with the bracket; a piston rod of the cylinder is fixedly connected with the drawing die; a high-pressure oil pump for providing power for the cylinder is connected to the cylinder and is fixed on the bracket; the drawing die comprises a fixed chuck and a fixed base which is fixedly connected with the fixed chuck; the drawing die is fixedly connected with the piston rod of the cylinder through the fixed base; a programmable logic controller (PLC) is arranged on the bracket.

The invention belongs to the technical field of medical insurance, and particularly relates to a medical treatment and medical insurance system. The medical treatment and medical insurance system comprises a comprehensive service platform, a self-service terminal subsystem, a medical terminal subsystem, a mobile terminal subsystem and a user management subsystem. The medical insurance system utilizes an Internet medical innovation mode in which a card, a comprehensive service platform, a self-service terminal and a mobile terminal are combined. A unified convenient medical treatment and socialguarantee service is supplied through a unified approach (social security card) and different channels (hospital counter, self-service terminal and mobile terminal). The mode breaks through the medical service mode of a single hospital and can supply service to the public in different steps of medical treatment. The comprehensive service platform integrates all medical resources and medical insurance in pilot cities in a region. A centralized management mode is utilized for making city residents enjoy the unified quick service.

The invention discloses a shielded cable connector. The shielded cable connector comprises a protecting tube, a connector body, a fastening screw cap and a waterproof ring, wherein the protecting tube sleeves a cable, a shielding net is arranged in the protecting tube, and the shielding net extends to the exterior of the protecting tube axially; a through hole is arranged in the middle of the connector body, a shielding spring is arranged in the through hole of the connector body, and the inner side of the shielding spring is attached to the outer sidewall of the shielding net; the fastening screw cap is connected to a first end of the connector body through a screw thread; the bottom of the waterproof ring is connected to the first end of the connector body, the waterproof ring is arranged in the fastening screw cap, and the inner sidewall of the waterproof ring is closely attached to the outer sidewall of the protecting tube. The protecting tube sleeves the cable, so that the cable is protected. Through the fastening screw cap, the inner sidewall of the waterproof ring is closely attached to the outer wall of the protecting tube, so that the dustproof and waterproof effect is played, and meanwhile, the inner side of the shielding spring in the connect body is attached to the outer sidewall of the shielding net, the electromagnetic wave generated by the shielding cable can be shielded to prevent from affecting the human body and other electrical elements.

The invention discloses a novel scaffold wall connecting part and a use method, and relates to the field of building construction. For solving the problem that an existing scaffold wall connecting part is poor in practicability, the following scheme is provided, the part comprises an anchor head, an embedded sleeve, a wall connecting screw rod, a fine adjustment steel pipe, a wall connecting steelpipe, a telescopic steel pipe, a buckling part and an outer frame vertical rod, the embedded sleeve is fixedly mounted on one side of the anchor head, the wall connecting screw rod is mounted in theembedded sleeve in a threaded manner, the fine adjustment steel pipe used for fine adjustment of the length is arranged between the wall connecting screw rod and the wall connecting steel pipe, the end, away from the wall connecting screw rod, of the wall connecting steel pipe is provided with the telescopic steel pipe used for length adjusting, the structure is novel, the wall connecting part caneffectively avoid outer wall leakage, the influence of the wall connecting part on outer window mounting and indoor construction is avoided, the material waste is reduced, cost is saved, the verticalrod perpendicularity is precisely adjusted, the error-tolerant rate of the wall connecting part is improved, it is ensured that the wall connecting part can be smoothly mounted, and the use method issimple, practical and effective.

The invention discloses a rainwater recycling and filtering system. The position of an end cover can be changed along with the precipitation amount, and thus rainwater enters an inspection well rapidly. By depending on a mechanical structure, the circuit laying cost brought by electrical equipment is avoided, the electric leakage hidden danger caused by use in a humid environment is avoided, and the influence of the large-power electrical equipment in a power plant on an electronic component in a sensor is avoided.

The invention discloses a 45-degree slope roof cast-in-place concrete construction method. The method is characterized by comprising the following steps: a, preparing concrete; b, arranging a steel wire mesh on a slope roof; c, setting the casting sequence of the concrete; d, curing the concrete and performing form removal. The 45-degree slope roof cast-in-place concrete construction method has the advantages that the leakage hidden trouble remained to the slope roof concrete structure in the existing construction is effectively overcome, the concrete forming quality is guaranteed, the engineering quality is safe and reliable, the delay of construction period and economic loss thereof caused by rework repair due to leakage of the structure are avoided, and the created potential economic benefit is far greater than the increased investment.

The invention discloses an electromagnetic valve pulse test tool used for an oil pressure electromagnetic valve. The electromagnetic valve pulse test tool comprises a tool body, an oil feed pipe and an oil discharge pipe, wherein the tool body is provided with a tool oil inlet corresponding to an oil inlet of the oil pressure electromagnetic valve and a tool oil outlet corresponding to an oil outlet of the oil pressure electromagnetic valve, and the tool body is provided with an oil feed channel communicated with the tool oil inlet and an oil discharge channel communicated with the tool oil outlet; the oil feed pipe is communicated with the oil feed channel in a sealed mode; the oil discharge pipe is communicated with the oil discharge channel in a sealed mode. Through the electromagnetic valve pulse test tool, a pressure pulse test of the oil pressure electromagnetic valve is achieved in the mode that pressure oil is not directly fed into the oil pressure electromagnetic valve but pressure oil is fed into the tool body. Thus, through the electromagnetic valve pulse test tool, change-over of the oil inlet and the oil outlet of the oil pressure electromagnetic valve of a screw compressor is achieved, oil pressure pulse and voltage withstanding tests can be conducted on the electromagnetic valve, the reliability of the oil pressure electromagnetic valve is verified, and the hidden danger that the sold oil pressure electromagnetic valve leaks is avoided.

The invention discloses a stirring paddle and an automatic temperature control stirrer using same. The stirring paddle comprises a stirring shaft, a paddle group and a paddle group fixing frame, wherein the paddle group fixing frame is fixed together with the middle part of the paddle group; and the stirring shaft runs through the edge of the paddle group fixing frame to be connected with the paddle group through a gear transmission mode. The paddle group fixing frame comprises an upper hollow-out fixed plate and a lower hollow-out fixed plate, which are the same as each other; and the paddle group is fixed between the upper fixed plate and the lower fixed plate. Through the adoption of gear transmission connection, constant instantaneous transmission ratio can be guaranteed, high stability is achieved and accurate and reliable transmission is achieved. As the stirring shaft is biased from the center, the stirring paddle disclosed by the invention is beneficial for containers to accommodate heated materials and convenient for operators to do relevant operations so as to eliminate safety problems. The automatic temperature control stirrer using the stirring paddle has an automatic stirring function, so that the temperature of a heating medium is uniform and heat transfer speed is increased, so that uniformity of heat conducted to the heated materials is guaranteed.

The invention discloses a welding process for a suction and exhaust pipe of a liquid accumulator. The liquid accumulator, a small steel pipe and a copper elbow pipe are included. A sleeve pipe is arranged at the joint of the small steel pipe and the copper elbow pipe, and the sleeve pipe is clamped at a through hole of the liquid accumulator. The welding process comprises the following steps of pre-welding processing including grinding and cleaning, component assembling, namely forming a weld assembly by clamping the end of the small steel pipe and the end of the copper elbow pipe in the sleeve pipe, and welding. As welding is carried out by clamping the sleeve pipe of the weld assembly at the through hole of the liquid accumulator, the potential hazards of leakage of a weld joint are reduced and eliminated; one-time welding or multi-time welding is carried out on copper pipes, iron pipes and other materials or structural products through different welding processes; the leakage rate is about hundreds of PPM through an existing conventional welding process; the leakage rate after improvement is about several PPM, and leakage is nearly eradicated.