134results about How to "Reliable sealing" patented technology

A holding device for a mounting part installed inside an aircraft fuselage having a lining including an insulating mat, the holding device includes a fastening part attached to the aircraft fuselage and protruding through an opening in the insulating mat; a sealing disk; and a holding part configured to attach the mounting part and being disposed on an inner side of the aircraft fuselage and cooperating with the fastening part configured to attach the mounting part so as to simultaneously fix the insulating mat between the fastening part and the holding part, wherein the holding part extends through the opening in a sealed manner, and wherein a lower surface of the sealing disk contacts and seals an edge region of the opening when the holding part is installed on the fastening part.

The present invention relates to a spinning device used for melting a plurality of single filaments.filaments. The spinning device is provided with a nozzle bracket and a detachable spinning nozzle assembly. The spinning nozzle assembly is held to a fusant connector of the nozzle bracket through at least one fusant inlet. For fixing the spinning nozzle assembly, a holding ring which surrounds the fusant connector is provided. The holding ring is connected with the nozzle bracket and is movably held in the axial direction relatively to the fusant connector through the spring component. Hereon, the spinning nozzle assembly and the holding ring are connected so that the fusant inlet is held to the fusant connector under the pre-tightening function caused by the spring component. For realizing enough pre-tightening force, the holding ring has screw thread at a free end, wherein the screw thread cooperates with a corresponding screw thread on the spinning nozzle assembly.

The invention relates to a top-mounted ultra-low temperature ball valve, comprising a valve body, a valve seat assembly, a valve ball, a valve cap assembly and a valve rod assembly, wherein the valve seat assembly comprises a valve seat ring and a compression ring; a first mounting groove is formed on the valve seat ring; a seal ring is embedded in the mounting groove; a turnup is formed on the valve seat ring; a first circular bead and a second circular bead are arranged on the valve seat ring; a support bush and a spring disc are arranged between the first circular bead and the valve body; a pressure spring is embedded in the spring disc; the second circular bead, the valve body and the compression ring form an annular seal chamber; a spring energy-accumulation ring is mounted in the annular seal chamber; and a fireproof structure is arranged between the fitted surfaces of the valve seat ring and the valve body. The top-mounted ultra-low temperature ball valve is characterized in that the seal ring is fixed by the turnup structure on the valve seat ring, the valve seat and the valve body are sealed by the annular seal chamber and the spring energy-accumulation ring, and simultaneously the fireproof structure is arranged between the valve seat and the valve seat ring, and therefore, the tightness of the valve seat and the valve ball in fitting under the working condition of ultra-low temperatures is guaranteed; the jointed part of the valve seat ring and the valve body is reliably sealed; and the valve has safe fireproof function.

The invention relates to an ice valve type pressure-maintaining and heat-preservation sampler, which comprises a drilling or sampling switch mechanism, a refrigerating fluid circulating system, a corebarrel lifting and positioning mechanism, an upper mechanical sealing mechanism, an ice valve forming mechanism, a corebarrel single-acting mechanism and a channel I-VIII which are connected. Pressure maintaining is realized by an ice valve formed below a corebarrel through mechanical sealing and refrigerating fluid circulation. Heat preservation is realized by coating porous foam, heat-preservation paint and a reflecting film on the outer wall of an inner circulation pipe. By adopting the invention, the problem that a mechanical valve is difficult to start, and is easily blocked by sundries in holes is solved, the reliability and the success ratio of pressure maintaining are improved, and a smaller radial dimension is beneficial to obtaining a larger-diameter core and improving the extraction rate of a hydrate core. Through tests, the ice valve realizes 25MPa sealing and is suitable for drilling a hydrate with a hole liquid column of 2500 m. When in pressure-maintaining sampling, a downhole reciprocating pump is started to drive the refrigerating fluid to circulate, and ice jamming is generated in an inner cavity at the lower end of the inner circulation pipe to form the ice valve so as to realize sealing pressure maintaining.

A one-piece rubber plug (30) of the hybrid type is mounted at a rear side of a female housing (20). Wire insertion holes (32) of the rubber plug (30) include large-diameter portions (34) and small-diameter portions (33). The outer circumferential surfaces of sealing plugs (60) corresponding to larger terminals (20A) are resiliently brought into close contact with the inner circumferential surfaces of the large-diameter portions (34), whereas the outer circumferential surfaces of wires (33) are resiliently brought into close contact with the outer circumferential surfaces of wires (50) corresponding to small terminals (20B).

The invention provides a sealing gasket of a cylinder head cover. The cross section of the sealing gasket is in a T shape, at least two mutually parallel enclosed sealing convex ribs are arranged along the length direction of the sealing gasket and on the binding face of the upper part of the sealing gasket and a cylinder head, three parallel oil storage tanks are arranged at the two sides and between the two sides of the sealing convex ribs, so that the compressibility of the sealing gasket is ensured, the oil flows into the oil storage tanks, and the oil can not leak out from a cylinder cover and the cylinder head. A group of vertical long-arc strip-type bosses are arranged at the two sides of the waist-shaped part of the cross section of the sealing gasket and are in interference fit with the sealing groove of the cylinder cover, thus when the sealing gasket is preassembled, the sealing gasket can be fixed in the groove to improve the sealing reliability. The sealing gasket of the cylinder head cover can ensure reliable sealing between the cylinder head cover and the cylinder head which are arranged on a high-performance supercharger engine, thereby improving the service life of the product, simultaneously being favorable for assembly and improving the efficiency.

The invention provides an oil inlet sealing structure of a diesel engine. The oil inlet sealing structure comprises a cylinder cover, an oil injector, a guide barrel body, a cam bearing frame, an oil inlet tube, a sealing bush, an oil injector pressing thread sleeve, an oil inlet tube pressing thread sleeve and an oil return head. According to the oil inlet sealing structure of the diesel engine, through the reasonable layout between the oil inlet tube and the cam bearing frame, the guide barrel body and the cylinder cover and the reasonable application of the sealing bush and sealing rubber rings, the reliable sealing of diesel oil and engine oil between the oil injector and the guide barrel body, the guide barrel body and the cylinder cover, the guide barrel body and the oil inlet tube, the oil inlet tube and the cam bearing frame is achieved while the height of an entire engine is reduced.

The invention discloses a ceramic double-gate feed valve. The ceramic double-gate feed valve comprises two side flanges made of metal, a middle valve body, a graphite gasket, an O-shaped ring, a valve rod, a stuffing box assembly, a stuffing gland, a ceramic valve seat, a ceramic ring, metal disc-shaped gates, a spring seat, supporting ejector rods, a stand column, a pneumatic actuator, an inner hexagonal bolt and a double-ended bolt and nut, wherein the metal disc-shaped gates and the ceramic ring jointly form the gates of the ceramic double-gate feed valve; the ceramic ring and the ceramic valve seat form a ceramic sealing pair; the pneumatic actuator pushes the valve rod and the spring seat, and drives the gates to move up and down, so that opening and closing action of the valve is completed; in the movement process of the gates, a spring enables the gates cling to the surface of the ceramic valve seat through the supporting ejector rods, so that stable and reliable sealing is guaranteed; and meanwhile, the gates generate autoroatation during linear motion due to the function of friction force, so that the ceramic double-gate feed valve has self-grinding performance and self-cleaning performance.

The invention discloses a drill rod connector which comprises a male drill rod, a female drill rod, a snap ring and nuts. An inner spigot is arranged on the lower end face of the male drill rod, chamfers are formed in orifices of the inner spigot, grooves are formed in the outer wall of the periphery of the male drill rod, an outer spigot matched with the inner spigot of the male drill rod is arranged on the upper end face of the female drill rod, grooves which are the same as those formed in the male drill rod are formed in the outer wall of the periphery of the female drill rod, two outer threads are formed in the outer wall of the periphery of the snap ring, the inner wall of the periphery of the snap ring is provided with sealing grooves and protruding blocks which are both symmetric up and down, the male drill rod is in location fit with the female drill rod through the inner spigot and the outer spigot, the snap ring is inserted into the grooves formed in the outer wall of the periphery of the male drill rod and the grooves formed in the outer wall of the periphery of the female drill rod through the protruding blocks, the male drill rod, the female drill rod and the snap ring are connected into a whole, and the two nuts are installed on the two outer threads of the outer wall of the periphery of the snap ring. The drill rod connector has the advantages of being reliable in sealing, capable of bearing forward and reverse rotating torque and convenient to assemble and disassemble.

The invention discloses a dynamic seal structure of a screw shaft of an underwater pressure-bearing shell. The external conical surface of the screw shaft and the internal conical surface of an adjustable seal seat with a stepped external side surface are in dynamic seal fit; a stuffing box tightening cap and a multi-ring stuffing box are successively installed on the small cylindrical surface of the screw shaft from inside to outside, and forms a seal surface with the inner hole of the underwater pressure-bearing shell through a stuffing box; the end surfaces of a large cylindrical surface and the underwater pressure-bearing shell can be connected by the adjustable bolt of the adjustable seal seat; and the stuffing box is adjusted and compressed by the stuffing box tightening cap positioned between the adjustable seal seat and the underwater pressure-bearing shell via a stuffing box compression bolt installed on the adjustable seal seat. The dynamic seal structure utilizes a conical surface structure and can adjust the axial distance of the seal seat, so that the compression force required by sealing can be reached on the seal surface and the sealing is more reliable. A plurality of sealing rings are utilized for line contact sealing, thus the defects of large seal contact area, larger required pressing force, big abrasion on shafts, quick abrasion of the stuffing box and large power loss of the traditional stuffing box are reduced and the service life of the seal structure is prolonged.

The invention provides a novel press-polishing machine which can effectively avoid invalidation of sealing equipment, comprising a frame and hard roller which can rotate and is arranged on the frame; wherein, the hard roller comprises a roller body, two shaft heads, a supporting tube and a heating device, the roller body is of a prismatical hollow structure, the two shaft heads are respectively fixedly arranged at the two ends of a roller body along the axial direction, at least one sealing equipment is arranged between the shaft heads and the roller body, at least two fixed trays are arranged in the roller body along axial direction at intervals, the supporting tube penetrates through the radial central part of the fixed trays, the heating device is arranged in the supporting tube, an input end of the heating device is electrically connected with an external power source by a revolving connector, the sealing equipment comprises an internal tray, a ring-shaped copper tube and an external tray along the axial direction of the roller body, the lateral wall of the ring-shaped copper tube is respectively connected with the adjacent external side of an internal tray and internal side of the external tray and are combined into a whole, the other side of the internal tray and the other side of the external tray are respectively connected with the shaft head and the roller body and are combined into a whole.

The invention relates to an air chamber-type press filter-used diaphragm plate, which comprises a diaphragm plate, wherein the diaphragm in the diaphragm plate is of the flaky silicon gel diaphragm; the back surfaces of the four corners of the flaky silicon gel diaphragm are provided with a boss-type liquid out passage and a boss-type liquid washing passage; a boss-type air passage is arranged between the boss-type liquid out passage and the boss-type liquid washing passage; a sealing surface of a plate core of the diaphragm plate is provided with an air hole that is communicated with a core cavity of the plate core; the plate core is provided with a boss-type liquid washing passage and a boss-type liquid out passage; the core surface of the plate core is provided with three or more than three bosses that are distributed around a liquid inlet of the plate core; and the boss-type liquid out passage, the boss-type liquid washing passage and the boss-type air passage are respectively spliced and matched with a liquid outlet, a liquid washing hole and the air hole that are arranged on the surface of the plate core. The air chamber-type press filter-used diaphragm plate has the advantages that: 1, the adverse effect to the mouthfeel of wine can not be caused; 2, the sealing is reliable, and the corrosion resistance is good; 3, the extrusion deformation between a filter plate and the diaphragm can be avoided, and the diaphragm can be prevented from being broken due to the extrusion; 4, the hidden air passage can not consume material and does not have trouble.

The invention discloses hollow glass with an outer seal structure. The hollow glass is characterized in that a supporting isolation frame (2) is arranged between the edge peripheries of two adjacent glass plates (1) of the hollow glass, all outer side surfaces of the edge peripheries of the hollow glass are entirely soaked or coated with a seal gum layer (4), and a coating layer (5) is compounded on the outer side of the seal gum layer (4).

A circuit element comprises a wiring board; the wiring board comprises a substrate and a wiring formed on the substrate, and a lid joined on the substrate containing a part of the wiring with a binder and making a sealed space above the substrate, wherein if a spot of the wiring joined with the lid by a binder is a spot of junction, a flank of both flanks of the wiring comprise bends in the spot of junction.

The invention relates to a push type underwater switch comprising a base. A conduction assembly is arranged at the lower part of the base and includes a copper pin base provided with two copper pins;and springs are arranged at the lower parts of the copper pins. A triggering assembly is connected to the upper part of the base and includes an outer case; a moving sealing member is arranged at themiddle part of the outer case and is provided with an end cover; and a shaft hole is formed in the center of the outer case. A shaft of a key penetrates the shaft hole; a contact is arranged at the lower end of the shaft of the key; a copper ring is arranged at the lower end of the contact; and a compressed ring is arranged between the key and the end cover. A first sealing ring is arranged between the moving sealing member and the end cover; and a second sealing ring and a third sealing ring are arranged between the moving sealing member and the outer case. An inner cylinder is arranged at the lower part of the outer case; an outer cylinder is arranged at the upper part of the base and is in threaded connection with the inner cylinder; and a fourth sealing ring is arranged between the inner cylinder and the outer cylinder. The push type underwater switch with high sealing reliability has the pulse type triggering function; the heavy working current is allowed to flow through the switch. The push type underwater switch can be applied to underwater key type operating equipment.

A sill flashing adapted to be mounted below and parallel to the lower edge of a window frame, said sill flashing including: -a first portion adapted to lie behind the lower edge of a window frame; a second portion adapted to lie between the cladding and the framing beneath the lower edge of the window frame; a third portion designed to provide an outwardly inclined cover for the top edge of the cladding below the lower edge of the window frame; a fourth portion adapted to brace the lower edge of said third portion; wherein said first, second, third and fourth portions are formed integrally with each other.

The invention discloses a fuel gas inlet branch pipe sealing structure for a double-fuel engine. The fuel gas inlet branch pipe sealing structure for the double-fuel engine comprises a fuel gas inlet branch pipe and a fuel gas injection valve connected with one end of the fuel gas inlet branch pipe. The fuel gas inlet branch pipe is of a double-layer structure and comprises an inner pipe body and an outer pipe body, the end, connected with the fuel gas injection valve, of the inner pipe body extends out of the end face of the outer pipe body, and the extension end of the inner pipe body is provided with a protruding portion and an extending portion, wherein the protruding portion extends outwards in the radial direction, and the extending portion extends into the fuel gas injection valve in the length direction. A first end face O-shaped seal ring is arranged between the end face of the protruding portion and the end face of the fuel gas injection valve. The outer wall of the protruding portion is in abutting joint with the inner wall of the fuel gas injection valve, and a radial O-shaped seal ring is arranged between the outer wall of the protruding portion and the inner wall of the fuel gas injection valve. The fuel gas inlet branch pipe sealing structure for the double-fuel engine is simple and novel in structure and capable of guaranteeing reliable sealing of the connection portion between the fuel gas inlet branch pipe and the fuel gas injection valve and preventing fuel gas leakage, and improves the safety of the double-fuel engine.

A cup tool includes a cup tool tube having a threaded upper end for connection to a high-pressure mandrel, an outer surface over which an elastomeric cup is slidably mounted for reciprocal movement from an unset position for entry into a wellbore to a set position in which an annular gap is obstructed to contain fluid pressure below the elastomeric cup. The outer surface of the cup tool tube has a lower region of a first diameter and an upper region with a second, larger diameter and a tapered region between the upper region and the lower region. The elastomeric cup includes a lip seal that rides against the outer surface of the cup tool tube, and seals against the tapered region of the cup tool tube to provide a high pressure seal between the cup tool tube and the elastomeric cup in the set position.

The invention relates to an underwater lighting device, in particular to a small underwater light-emitting diode (LED) lighting device for an underwater robot. The small underwater LED lighting device comprises a perspective window, a sealing cover, collecting lenses, LED luminous bodies, a radiation plate, a control plate, a sealing tail cover and a watertight connector assembly base, wherein the radiation plate and the control plate are respectively installed in a cabinet body of the sealing cover, a plurality of LED luminous bodies are evenly distributed on the surface of one side of the radiation plate, the collecting lenses are sleeved on protruded portions of the LED luminous bodies, the perspective window is in sealing connection with the inner wall of one end of the sealing cover and is positioned on the outer sides of the collecting lenses, the control plate is arranged on the other side of the radiation plate and electrically connected with the LED luminous bodies, the sealing tail cover is in sealing connection with the other end of the sealing cover, and the watertight connector assembly base is in sealing connection with an end face of the outer side of the sealing tail cover and electrically connected with the control plate. The small underwater LED lighting device ahs the advantages of being compact in structure, reliable in sealing, flexible and controllable, flexible to install and fix and suitable for different types and different requirements of underwater robots.

The invention provides a trolley sealing device which comprises sealing components and a power component. Each sealing component comprises a spring steel plate, a first rotating piece, a sealing plate and fiber cotton, the power component comprises an electric push rod, a second rotating piece, a main shaft and push pieces used for moving the sealing components to conduct sealing, the trolley sealing device comprises one or more sealing components and the push pieces, the sealing components and the push pieces are arranged in a paired mode, and the push pieces are all arranged on the main shaft. According to the trolley sealing device, gaps in the combining portions of a furnace body and the two sides of a trolley are sealed, the problem that the sealing performance is damaged due to the fact that the fiber cotton can be ground off through hard sealing after thermal expansion is solved, the main shaft is operated through the electric push rod, unified control over the push pieces and the sealing components is achieved, the push pieces and the sealing components are coincident in operation, and the gaps of the combining portions of the furnace body and the two sides of the trolley are sufficiently sealed.

The invention discloses a metal vacuum composite insulation plate with a getter. The metal vacuum composite insulation plate comprises a shell, a core material, a core plate and a vacuum cavity, and is characterized in that the shell is a metal plate or a metal composite plate, wherein the core material is positioned in the vacuum cavity for providing additional strength to the shell and guaranteeing the flatness of the shell under atmospheric pressure; the vacuum cavity is a closed cavity formed by performing the welding edge sealing under normal pressure and the high-temperature opening sealing under vacuum for the shell; the opening sealing is a step that an extraction opening prefabricated in the shell is automatically sealed in a vacuum furnace by using a low-temperature solder according to a liquid sealing principle; and the getter is arranged in the vacuum cavity. A preparation method of the metal vacuum composite insulation plate is simple in process; and the prepared metal vacuum composite insulation plate with the getter can overcome the defects of a traditional insulation plate and a traditional vacuum insulation plate, and can be improved in strength, and heat insulation, sound insulation, fire prevention and decoration functions.

The invention relates to a torsion target type flowmeter. The torsion target type flowmeter is characterized by consisting of a target sheet (2), a target rod (3), a target torsion pipe (4), a torsion mandrel (41), a supporting ring (42), a torsion rod (61), a regulating spring (62), a strain sensor (63) and a meter head (9), wherein the target torsion pipe (4) is twisted through the after the target rod (3) after target sheet (2) is stressed; and the torsion mandrel (41) drives the torsion rod (61) to rotate to act on the strain sensor (63) to output an electric signal to the meter head (9) to finish transformation. The torsion target type flowmeter is high in structural property and reliable in sealing property; the strain sensor is far away from a high-temperature medium and can be applied to working conditions of high temperature and high pressure; the force measuring range is wide; the target force ranges from one tenth newton to hundreds of newtons; the pressure resistance can reach 42 MPa; and the product has high application ability and wide application range.

The invention belongs to the field of automobile braking energy recycling, and particularly relates to a braking power generation mechanism based on hydraulic transmission. The braking power generation mechanism based on hydraulic transmission comprises a brake disk, a brake disk protrusion, brake pad supports, hydraulic columns, a hydraulic cylinder, a piston, a hydraulic motor and a power generator. The brake pad supports are installed on a brake mechanism support. When the brake disk rotates, at the early stage of the braking process, a brake pad gets close to the brake disk gradually, an ejecting block firstly makes contact with the protrusion and is matched with the protrusion, the ejecting block linearly reciprocates in the direction of a cylindrical guide rail, the piston is driven to reciprocate through cooperation so that hydraulic oil can be driven to flow in the hydraulic motor in a reciprocating manner, and therefore the power generator can be driven to generate power; and at the later stage of braking, the brake pad starts to make contact with the brake disk, large friction force is generated, and wheels are braked forcibly. Due to the cooperation of the ejecting block and the protrusion, braking energy is converted into reciprocating movement, and therefore the hydraulic oil is driven to flow in the reciprocating manner, the power generator is driven to generate power, the braking energy is effectively utilized, and the energy saving effect of an automobile is improved.

The invention provides a valve, which solves the leakage problem caused by the invalidation of the sealing of a rubber film in the prior art. The technical scheme is as follows. The valve comprises a valve body and a valve shell. The valve body is provided with a switching orifice and a large looping. The large lopping of the valve body adopts fixed non-rubber sealing which is a nut connected with the large looping of the valve body through threads. The upper part of the nut is connected with a sleeve in a sealing manner. The nut and the sleeve are metal material or nonmetal hard material, which do not attract magnet. The invention adopts the metal material or nonmetal hard material sealing, abandons the conventional rubber film sealing and avoids the gas leakage phenomenon caused by the invalidation of the rubber film after long-period use. Because of the fixed connection, damage caused by frequent movement does not exist. The sealing is reliable.

A round air door used for partitioning circulation of pipeline gas comprises a round shell (3). A round baffle (1) is arranged in the shell. A rotating shaft (4) is fixedly connected to the baffle. The baffle synchronously rotates together with the rotating shaft. The rotating shaft is supported on the shell. A sealing device is arranged on the peripheral edge of the baffle. The round air door is characterized in that the sealing device comprises a rubber tube (7); the rubber tube is arranged in a groove (2) in the peripheral edge of the baffle in a surrounding manner; a gas nozzle (71) is arranged on the rubber tube and connected to the rotating shaft; a vent hole (72) is arranged at one end of the rotating shaft and communicated with the gas nozzle; and high-pressure air is input from the vent hole, and the rubber tube can expand and be attached to the inner wall of the shell. Compared with the prior art, the round air door has reliable sealing performance, is small in consumed air source and has the energy-saving effect.

The invention belongs to the technical field of electric power operation climbing robots, and particularly relates to a maintenance robot with an online bolt retightening function. The maintenance robot comprises a main machine and an angle steel clamping assembly arranged on the main machine, wherein a bolt retightening device used for retightening a bolt is arranged at the head end of the main machine, and comprises an extension arm and a working head fixed to the extension arm; the extension arm comprises a bottom frame fixed to the main machine; a rotating assembly used for driving the working head to rotate and a plane displacement assembly used for driving the working head to operate at a fixed point are mounted on the bottom frame; a sleeve auxiliary replacement box facilitating high-altitude sleeve replacement operation with the working head is further fixed to the main machine; and the sleeve auxiliary replacement box and the bolt retightening device are both fixed to the head end of the main machine. On the premise that safe construction is ensured, the sleeve online replacement function under full high-altitude operation can be achieved, the manual inspection cost is greatly saved finally, the maintenance efficiency is improved, and safe and reliable operation of a power transmission system is ensured.

The invention relates to a part structure of an electric heating device, in particular to an electric heating pipe head multifunctional protecting connector which comprises a pipe connector and a sealing pipe component. The sealing pipe component comprises a section of metal outer pipe and a center conductor placed at the center of the metal outer pipe. One end of the center conductor is provided with a structure which can be connected with an electric heating pipe guiding-out end conductor in a matched mode. The other end of the center conductor is provided with a guiding-out rod which can be connected with an external power supply. The position between the center conductor and the metal outer pipe is provided with a sealing sleeve made of polytetrafluoroethylene material for sealing and filling. The metal outer pipe and a tubular outer shell of an electric heating pipe can be connected in a sealing mode through the pipe connector. Dielectric can be effectively prevented from leaking from an electric heating pipe inner core, a single electric heating pipe can be subjected to overcurrent protection, external moisture can be effectively prevented from entering the electric heating pipe inner core, and the insulating property of insulated dielectric is guaranteed.

The invention provides a special corrugated pipe stop valve for chlorine gas and relates to the field of special valves. The special corrugated pipe stop valve comprises a valve body, a valve rod, a valve clack, a valve seat and a valve cover, wherein the valve body comprises an inlet, an outlet and a middle mounting opening, the inlet and the outlet are separately provided with connector flanges, the middle mounting opening is provided with a middle flange, and the valve cover is fixedly connected with the middle flange through a flange, a bolt and a nut; the middle in the valve body is connected with the valve seat through a channel partition board, the valve rod is mounted through the valve cover, the valve clack is fixedly connected at the inner end of the valve rod, the valve clack is closely fitted with the valve seat, a filler sealing mechanism is arranged between the valve rod and the upper end part of the valve cover, and the outer end of the valve rod is connected with a valve rod lifting mechanism; and a corrugated pipe assembly is arranged in the valve body, the corrugated pipe assembly is arranged on the valve rod in a sleeving manner, the corrugated pipe assembly comprises a corrugated pipe and a partition board, the corrugated pipe and the partition board are both made from metal steel, the partition board is welded to the upper end of the corrugated pipe, one circle of concave opening is formed in an inner opening of the middle flange, the partition board is placed in the concave opening, and the lower end of the corrugated pipe is hermetically welded with the valve clack. The valve is free of leakage, high in strength and long in service life.

The invention discloses a separated-type double-thread connected micro injection molding test mold, belongs to the field of micronano fabrication and injection molding, and relates to a micro injection molding test mold which is a round micro chip that can be mounted and dismounted rapidly and is manufactured by an MEMS technology, and can monitor the pressure and temperature distribution of a cavity in the injection molding process. The test mold consists of a fixed mold component, a moving mold component and a four-claw tool; the fixed mold component consists of a cavity component, a fixed mold frame and a temperature sensor; the moving mold component of the mold consists of a push rod fixing plate, a push rod, a fixed plate, a moving mold frame, a hollow rod and a micro pressure sensor. The test mold is connected by double separated-type threads, has the advantages that sealing is reliable, the mold core is convenient to dismount and replace, the compression fore of the mold core is easy to adjust and the like; pressure and temperature sensors are integrated on a mold, and can monitor the pressure and temperature dynamic variation and distribution in the injection molding process in real time, and have important guidance effect for optimizing the novel technology.

The invention discloses a soft seal fixed ball valve turning-out-preventing valve carrier. The soft seal fixed ball valve turning-out-preventing valve carrier comprises a valve carrier supporting ring and a valve carrier soft seal ring, wherein the valve carrier supporting ring is provided with a ring of soft seal valve carrier groove, and the valve carrier soft seal ring is embedded in the soft seal valve carrier groove. Primarily, the side wall of the soft seal valve carrier groove is provided with barbs. In addition, the bottom of the soft seal valve carrier groove can be provided with protruding ribs, a fire-proof seal grease injection system of the valve carrier is improved, and the seal inclined surface of the valve carrier supporting ring is provided with the seal groove with the arc transverse section. Therefore, the soft seal fixed ball valve turning-out-preventing valve carrier resolves the problem of a contradiction between rolling and electroplating when the soft seal fixed ball valve carrier is assembled, the fire-proof grease injection effect is improved, the valve carrier is assembled more conveniently, the structure is simpler, the process is more reasonable, and seal performance is enhanced.