79results about How to "Achieving a double seal" patented technology

The invention discloses a vacuum pipe clamp valve applied to a vacuum system and a control method of the vacuum pipe clamp valve. The vacuum pipe clamp valve comprises a clamp valve pipe body and a casing pipe. A seal space is formed between the inner wall of the clamp valve pipe body and the outer wall of the casing pipe. A first elastic pressing block device and a second elastic pressing block device are arranged at the outer side of the clamp valve pipe body. A pressing block of the first elastic pressing block device and a pressing block of the second elastic pressing block device extend into the seal space, and the casing pipe is clamped and closed through the pressing block in the first elastic pressing block device and the pressing block in the second elastic pressing block device.A vacuum pipe interface is further arranged at the outer side of the clamp valve pipe body, wherein the vacuum pipe interface is used for conducting vacuum extraction on the seal space. After the sealspace is extracted to be in the vacuum state through the vacuum pipe interface, the pressing block of the first elastic pressing block device and the pressing block of the second elastic pressing block device retract to loosen clamping of the casing pipe, so that the casing pipe is opened. By means of the vacuum pipe clamp valve, it is not needed to additionally arrange an air compression systemto control the pipe clamp valve to be switched on and off; production cost is lowered; and reliability is high.

The invention relates to a double-sealing structure of a radio frequency coaxial connector. The double-sealing structure comprises a cable clamping part, a locking nut for connecting a connector body of the radio frequency coaxial connector, a first sealing ring and a second sealing ring, wherein the cable clamping part comprises a first end part, and can be movably arranged in the locking nut; the first sealing ring is positioned in the inner surface of the locking nut and between the end face of the first end part and the inner wall of the locking nut; the second sealing ring is arranged on the outer surface of the locking nut, and is used for realizing sealing with the connector body; the first end part is limited by the locking nut in a direction away from the locking nut, and can be in press fit connection or threaded connection with the locking nut; and the first and second sealing rings may be O-shaped, rectangular or square. The invention also relates to the related radio frequency coaxial connector. The double-sealing structure is ingeniously and uniquely designed, good in sealing effect, smaller in part number, simply manufactured, low in production cost and using cost, short in mounting time, repetitively mountable and suitable for large-scale popularization and application, and the parts of the double-sealing structure are difficult to lose.

The invention provides a jack-tightening and sealing mechanism of a hydraulic jet impacter, belonging to the fields of geological mineral exploration engineering and petroleum drilling. The device comprises an upper connecter, a disc spring frame, a disc spring, a seal ring, an adjusting washer and a fluidic element. The maximum working load of the disc spring can be obtained through calculation and then software design and simulation are adopted to obtain the specification of the disc spring which meets the requirement of the static strength and the fatigue strength simultaneously, thus the phenomenon that the cylinder body deforms and the piston is locked and can not move flexibly caused by over-tight axial assembly, and the phenomenon that high pressure mud leaks and the end faces of each part are eroded caused by over-loose axial assembly and over-low set pretightening force, in the test and application process of the existing hydraulic jet impacter is solved. In addition, a vertical overflowing section is arranged above the inlet structure of the fluidic element; and a radial seal ring is added between the disc spring frame and the fluidic element, thus the fluid transition structure between the fluidic element and the disc spring frame can be optimized and the service life of the fluidic element can be increased.

The invention discloses a pipeline fastener convenient to operate and a method. The pipeline fastener comprises a top cover, a bottom cover and a rotation disc. The bottom cover is arranged below thetop cover. The fastener has advantages that through a design of the rotation disc, a rotating handle, a support plate, a guide rod, a screw rod and a mounting plate, when the fastener is disassembledand assembled, operation can be performed only by rotating the rotating handle; trouble of traditionally dismounting bolts one by one is effectively avoided; dismounting and mounting steps of the pipeline fastener are simplified; dismounting and mounting efficiency of the pipeline fastener is improved; practicality is good; a sealing gasket I, a sealing gasket II, a sealing strip and a sealing groove are designed so as to realize double sealing of the pipeline during fastening connection, and sealing performance of the pipeline during fastening connection is effectively improved; and through the design of a connecting rod, a sliding sleeve, a sliding rod and a spring, overall vibration of the pipeline in a using process is greatly reduced, a risk of cracking at a joint of the pipeline is effectively avoided, and the fastening connection of the pipeline is safer and more reliable.

The invention discloses a medical airtight door, including a door frame, a mounting frame and a door body. A through groove of a wall body is provided with the door frame, the inner wall of the door frame is provided with an annular groove, the inner wall, located on the back side of the annular groove, of the door frame is provided with an inner sealing unit, the upper end of the left side of thefront side face of the door frame is provided with a through hole, the mounting frame is arranged on the wall body, and is located on the left side below the mounting frame, a detection unit is arranged in the mounting frame and the annular groove, left and right symmetrical fixing plates are arranged in the mounting frame, a reciprocating unit is arranged between the two fixing plates, an expansion unit is arranged on the reciprocating unit, the door body is arranged on the expansion unit, and corresponds to the door frame, an outer sealing unit is arranged on the door body and the door frame, an observation window through groove is formedin the door body, and a glass window is arranged in the observation window through groove in a matched mode.According to the medical airtight door, thesealing effect can be detected, sealing performance is good, fog cannot be generated on the glass window, and use is convenient.

A restrained damping heat and sound insulation device is characterized by comprising a sealed shell and heat and sound insulation functional composite materials filled in the shell. A preparation method of the restrained damping heat and sound insulation device includes preparation, assembly and sealing of the heat and sound insulation functional composite materials and the shell. Reliable connection between a sealing material and a heat and sound insulation plate is ensured, the end face and the periphery of a power cabin truss of an engine are doubly sealed and prevented from directly contacting with open flame, flame resistance and vibration resistance are high, the restrained damping heat and sound insulation device is fixed by screwing or riveting during assembly, welding deformation is avoided, and heat and sound insulation effects are ensured.

The invention discloses a spindle sealing system for a motor working under a high-temperature or high-pressure environment, which belongs to the technical field of motor equipment. The spindle sealing system comprises a first connector and a second connector; the first connector is connected with a motor housing; the second connector is connected with a spindle, and the first connector and the second connector are connected through screw threads. The spindle sealing system is characterized in that a piston rod sleeves the spindle; the piston rod is connected with a piston; one end of the first connector is connected with a piston end cover; the other end of the first connector is connected with a first sealing element; the second connector is connected with the spindle through a second sealing element; a transitional cavity is defined by the first connector, the second connector and the spindle; an internal cavity is defined by the motor housing, the spindle and the piston end cover; the first connector is provided with a first pressure balance hole, and the piston end cover is provided with a second pressure balance hole. Because the pressure difference between sealing is balanced by the piston, the sealing can work under a zero-pressure-difference environment, consequently, the sealing reliability is improved, and the stable operation of the motor under the high-temperature or high-pressure environment can be ensured.

The invention relates to a tubular product connecting structure and a water dividing and collecting device. The tubular product connecting structure comprises a core body, a steel ball clamp spring mechanism, a tubular clamp spring and a sealing sleeve. An annular groove is formed in the outer wall of the core body, and is formed in one end close to an outlet of a core body; the sealing sleeve is arranged on the core body in a sleeving manner, and the sealing sleeve is located in the annular groove; a convex blocking body which stretches out in the radial direction of the sealing sleeve is arranged at one end, far away from the outlet of the core body, of the sealing sleeve, and at least one anti-slide rib is arranged on the outer wall of the sealing sleeve; the steel ball clamp spring mechanism is arranged on the core body in a sleeving manner and is detachably connected with the core body; and the tubular clamp spring is arranged between the core body and the steel ball clamp spring mechanism in a sleeved manner. The inner wall of the tubular product is in contact with the outer wall of the sealing sleeve to form radial seal, and the end face of the tubular product abuts against the convex blocking body of the sealing sleeve to form axial seal, so that double seal is achieved between the tubular product and the core body; and the anti-slide ribs are arranged on the outer wall of the sealing sleeve, so that tubular product sliding is avoided, and the further sealing effect is achieved.

The invention provides a valve seat structure of a track ball valve which comprises a valve seat. The valve seat comprises an upper valve seat and a lower valve seat. The contact face of each of the upper valve seat and the lower valve seat is a stepped face. A soft seal ring is disposed between the stepped faces, close to the inner side, of the upper valve seat and the lower valve seat. The soft seal ring protrudes out of the seal faces of the upper valve seat and the lower valve seat. The stepped faces, close to the outer side, of the upper valve seat and the lower valve seat are fixedly connected through threads. The axial contact end face of the valve body of the upper valve seat is a stepped face, a flexible graphite seal ring is disposed between the low end face of the stepped face and the valve body, the high end face of the stepped face is parallel with the end face of the lower valve seat, and a compression gap is reserved between the high end face of the stepped face and the valve body. A groove is formed in the radial contact face of the upper valve seat and the valve body. An O-shaped ring is disposed in the groove. The upper valve seat is fixedly connected with the valve body through a pressing ring. Hard alloy is disposed at the seal face of the upper valve seat and the lower valve seat by means of surfacing. The valve seat structure adopting composite sealing is good in airtightness, zero leakage is achieved, and mounting and maintenance convenience are achieved by using the pressing ring to fix the valve seat structure.

The invention relates to a sealing structure used for a moderate and high temperature battery, the moderate and high temperature battery, and an assembling method of the sealing structure. The sealing structure comprises a metal part used for leading out curren; a sealing cavity used for sealing an assembling gap is arranged on the inner side of a battery on the assembling gap, where the metal part is assembled, on the battery; the metal part passes through the sealing cavity; one layer, two layers, three layers or more than three layers of salt layers used for liquid seal are arranged in the sealing cavity; each salt layer is arranged from one side of the inner side of the battery to one side of the outer part of the battery, and the melting points successively lower. The sealing structure disclosed by the invention has excellent gas tightness and anti-corrosion property, the service life of the moderate and high temperature battery when the moderate and high temperature battery works at the temperature of 150-700DEG C is guaranteed, meanwhile, the sealing structure also has an insulation characteristic, volume occupied by battery sealing is greatly reduced under a condition that mechanical strength is guaranteed, and space is saved.

The invention relates to the technical field of high-voltage power transmission, and discloses a control device of a high-voltage switch. The control device comprises a dust-proof box and further comprises a driving mechanism mounted at the bottom of an inner cavity of the dust-proof box; a positioning mechanism mounted at the right end of the rear side of the inner cavity of the dust-proof box; three opening and closing mechanisms mounted on the upper surface of the dust-proof box at equal intervals from left to right; and a protection mechanism mounted on the right side wall of the dust-proof box. The rotating shaft has a self-locking function, prevents a high-voltage circuit breaker from being restarted due to misoperation, avoids damage to related equipment or electric shock of personnel, is high in safety, can realize double sealing of a moving contact area, is stable in sealing performance, can prevent leakage from occurring in the high-voltage circuit breaker, and further enables the high-voltage circuit breaker to maintain good flame retardant performance. The arc extinguishing performance is ensured, fire disasters are avoided, and the service life is prolonged.

The invention provides an expansion valve, and belongs to the technical field of air conditioner parts. The expansion valve solves the problem that an existing expansion valve is high in manufacturing cost after a defrosting function is added is solved. The expansion valve comprises a main valve body and a defrosting valve body, wherein the two end ports of the defrosting valve body are both communicated with the main valve body, a valve element assembly is arranged at the position, between the two end ports of the defrosting valve body, in the main valve body, two limiting parts are arranged in the defrosting valve body, and the two limiting parts are both provided with overflowing holes which are formed in the length direction of the defrosting valve body in a penetrating manner. A defrosting valve element capable of sliding and blocking the overflowing holes is arranged between the two limiting parts, auxiliary springs are arranged between the defrosting valve element and the two limiting parts, the defrosting valve element can be separated from the two limiting parts under the action of auxiliary springs, and the starting elastic force value of the main spring is larger than the elastic force value generated when the auxiliary springs are compressed till the defrosting valve element blocks the overflowing hole. According to the expansion valve, after the defrosting function is added to the expansion valve, the manufacturing cost is low.

The invention relates to a corrugated hose connector and a corrugated hose component. The corrugated hose connector comprises a lock nut, a seal sleeve and a joint. The outer wall of the seal sleeve is arranged to be truncated cone-shaped, and the end face, inserted into the lock nut, of the joint is provided with the a truncated cone-shaped groove, so that when the joint is connected to the locknut, the bottom wall of the truncated cone-shaped groove abuts against the end face of the seal sleeve for providing axial thrust to the seal sleeve; the side wall of the truncated cone-shaped grooveabuts against the outer wall of the seal sleeve for providing radial thrust to the seal sleeve. Thus, the double seal in axial and radial directions is achieved overall, and the seal effect is improved; and leakage is avoided.

The invention discloses an oil seal assembly for a roller bearing of a paddy field tractor and a second-order seam sealing structure. The inner fixed sleeve of the first oil seal is provided with a first ring body and a second ring body in sequence, and the outer surface of the second oil seal The fixing sleeve is set outside the second ring body, the first sealing protrusion of the second oil seal extends between the first ring body and the second ring body, and the second sealing protrusion extends between the ring body and the inner fixing sleeve, Thus, two oil seal chambers are formed between the inner fixed sleeve of the first oil seal and the outer fixed sleeve of the second seal; the oil seal assembly for the track roller bearing of the paddy field tractor of the present invention is fixed in the inner fixed sleeve of the first oil seal. The first ring body and the second ring body are arranged outside the sleeve, so that the two sealing protrusions of the second seal form a double sealing structure with it, which greatly improves the sealing effect, thereby effectively reducing the wear of the oil seal and prolonging the service life. The invention also proposes a second-order seam sealing structure for the roller bearing of the paddy field tractor, which effectively prevents muddy water from entering the bearing.

The invention discloses a single-capacitance type liquid level meter. The device comprises an anode tube, a cathode tube, a top sealing and positioning assembly and a bottom sealing and positioning assembly; the top sealing and positioning assembly comprises a top sealing and positioning plug, a first sealing ring and a second sealing ring; the top sealing positioning plug comprises a first mounting column and a second mounting column; the first mounting column is sleeved with the top of the cathode tube, the first sealing ring is located between the cathode tube and the first mounting column,the second mounting column is sleeved with the top of the anode tube, and the second sealing ring is located between the anode tube and the second mounting column; and the bottom sealing and positioning assembly comprises a bottom sealing and positioning plug, a positioning seat and a third sealing ring, the bottom sealing and positioning plug is mounted at the bottom of the anode tube, the thirdsealing ring is positioned between the anode tube and the bottom sealing and positioning plug, and the positioning seat sleeves the bottom of the cathode tube. The single-capacitance type liquid level meter has the advantages of being convenient to assemble, capable of meeting the concentricity requirement for the anode tube and the cathode tube, high in measurement precision and low in cost.

The invention discloses a double-seal anti-falling super capacitor cover plate. The cover plate comprises a rubber layer, a laminated phenolic resin paperboard is adhered to the lower part of the rubber layer, and through holes A are formed in the two ends of the top of the laminated phenolic resin paperboard and the two ends of the top of the rubber layer correspondingly; pure aluminum rivets arearranged on the inner sides of the through holes A correspondingly, annular soldering lugs are installed on the outer sides of the pure aluminum rivets correspondingly, rubber gaskets are arranged onthe tops of the annular soldering lugs correspondingly, and the tops of the rubber gaskets are tightly attached to the laminated phenolic resin paperboard. According to the invention, the cover plateis provided with the integrated pure aluminum rivets and the soldering lugs, so the possibility of loosening of the pure aluminum rivet is avoided, the soldering lugs combined with the pure aluminumrivets are prevented from falling off, and the service live of a capacitor is prolonged while the stability is guaranteed; according to the double-sealing anti-falling super capacitor cover plate, through the soldering lugs, the rubber gaskets, the annular grooves and the rivets, the double sealing is effectively achieved, the possibility of electrolyte leakage is greatly reduced, and the servicelife of the capacitor is further prolonged.

The invention relates to a sealing ring for composite steel pipe connection. The sealing ring comprises a supporting framework and a sealing body, wherein the sealing body comprises two inner sealing surfaces inserted into a pipe orifice of a composite steel pipe and an end-face sealing surface integrally formed with the inner sealing surfaces, and the two inner sealing surfaces are symmetrically arranged on the two sides of the end-face sealing surface. The sealing ring solves the technical problems that the end face of the steel pipe is exposed in water when the composite steel pipe in the prior art is connected, and the steel pipe is galvanically corroded; as a result, the water quality is polluted, the pipe leaks water, and the service life of the pipe is shortened.

The invention relates to material transfer equipment, in particular to three-phase foam sealing, pressure relief and dust suppression equipment. The three-phase foam sealing, pressure relief and dust suppression equipment comprises a first foam dynamic raft type check curtain, a second foam dynamic raft type check curtain, a foam sealing skirtboard, a foam spring pressure relief device and a foam liquid preparation unit. Each foam dynamic raft type check curtain comprises multiple raft pieces rotationally connected with a pipe body. Each raft piece is provided with a first through hole and grooves. Multiple second through holes are formed in each pipe body along the peripheral face of the pipe body, and the second through holes of each pipe body communicate with the corresponding first through holes. The foam sealing skirtboard is provided with a first columnar portion and a second columnar portion, the first columnar portion is provided with ceramic pipes, and multiple cavities used for containing foam liquid are formed between the second columnar portion and the first columnar portion. A foam liquid spray opening, a fixed set, a spring set, a foam disc, a first fixed pulley, a drive motor, a second fixed pulley and a water outlet used for pipeline washing re arranged at the position, close to a first end opening, of the foam spring pressure relief device. According to the three-phase foam sealing, pressure relief and dust suppression equipment, sealing of a guide chute can be dynamically guaranteed for a long time, dust overflow can be dynamically suppressed for a long time, and the positive pressure of the guide chute can be greatly reduced.

The invention belongs to the technical field of batteries, and particularly discloses a sealing method of batteries. The specific implementation process is as follows: (1) fixedly installing a pole plate group into a battery case, and leaving a space between the pole plate group and the battery case; 2) manufacturing a heat conductor, fixedly installing that heat conductor in the battery case, andpositioning the heat conductor between the electrode plate group and the battery case, wherein an electric heating wire is arranged on a side wall of the heat conductor close to the electrode plate group; 3) sealing an upper cover on the battery case; (4) energizing the electric heating wire, and filling the fluid paraffin wax between the heat conducting body and the electrode plate group, and deenergizing the electric heating wire after the paraffin wax fills the space between the heat conducting body and the electrode plate group; (5) adding A thermosetting resin between the heat conductorand the battery housing until the thermosetting resin fills the space between the heat conductor and the battery housing. This scheme uses paraffin wax and thermosetting resin to seal the battery, andthe sealing effect is good.

The invention relates to the technical field of refrigerated warehouse equipment, in particular to a translation door provided with a cold insulation bridge aluminum alloy composite door frame. The translation door comprises a warehouse plate, a movable door sheet and a sealing strip; the movable door sheet is arranged on the warehouse plate; an aluminum alloy door frame is arranged on the warehouse plate, and is located between the warehouse plate and the movable door sheet; a thermal insulation line cover plate made of PVC plastics is arranged on the aluminum alloy door frame and is located at one end, far from the warehouse plate, of the aluminum alloy door frame; and the sealing strip is located between the aluminum alloy door frame and the movable door sheet. When the translation door provided with the cold insulation bridge aluminum alloy composite door frame is in use, through a baffle extending outwards on the thermal insulation line cover plate, the baffle is in contact with the sealing strip, that is on the condition that the sealing strip and the aluminum alloy door frame are sealed, the baffle is in contact sealing with the sealing strip, so that the thermal insulation property of the refrigerated warehouse is ensured, and during leakage, a passing path of cold air in the refrigerated warehouse is lengthened, so that the cold air leakage speed is reduced.

The invention discloses a synchronous double-switch valve plate assembly and a synchronous double-switch valve core. The synchronous double-switch valve plate assembly comprises a moving valve plate and a fixed valve plate, wherein the fixed valve plate is provided with a first water inlet and outlet through hole, a second water inlet and outlet through hole, a third water inlet and outlet throughhole and a fourth water inlet and outlet through hole; the lower surface of the moving valve plate is provided with a first passing water channel and a second passing water channel; the first passingwater channel comprises an A communicating end and a B communicating end; the lower surface, between the A communicating end and the B communicating end, of the moving valve plate is a first sealingsurface; the second water channel includes a C communicating end and a D communicating end; the lower surface, between the C communicating end and the D communicating end, of the moving valve plate isa second sealing surface; the lower surface, between the A communicating end and the D communicating end, of the moving valve plate is a third sealing surface; and the lower surface, between the B communicating end and the C communicating end, of the moving valve plate is a fourth sealing surface. The valve plate assembly has good pressure resistance, simple sealing structure, small torque required during rotating and low overall cost, and is convenient to popularize.

A circular air filter for vehicle according to the present invention is mounted in an air cleaner body disposed between an air inlet configured to suction air from an exterior and an air duct configured to provide filtered air to an engine, and includes: a frame formed in a cylinder shape that forms a penetration aperture through which air passes along a circumference thereof; an engaging portion formed at a first end of the frame and coupled to a first side of the air cleaner body; and a non-woven fabric disposed external to the frame and coupled to the engaging portion for filtering foreign materials. An air cleaner assembly for a vehicle according to the present invention comprises: an air filter; an air cleaner body having the air filter mounted thereto and an air inlet configured to suction air from an exterior coupled to an air duct configured to discharge filtered air to an engine; and an air cleaner cover configured to open or close an upper surface of the air cleaner body.

The invention relates to a gas injector for injecting a gaseous medium, comprising a sealing element (5) which is arranged on an outer surface of an outer component (4, 10) of the gas injector, the sealing element (5) being arranged for sealing between the outer surface and an internal combustion engine receiving element (6). The sealing element (5) has an outer sealing geometry (50) for sealing on the receiving element (6) and an inner sealing geometry (51) for sealing on the outer surface of the gas injector, and wherein the sealing element (5) has a support area (56), which is arranged on the outer circumference of the sealing element (5) opposite to the inner sealing geometry (51) and is spaced apart from the outer sealing geometry in the axial direction (X-X).