376results about How to "Achieve sealing" patented technology

The invention provides a dynamic-fluid coupling effect induced earthquake simulation test device and a test method. The test device comprises a dynamic true triaxial electromagnetic Hopkinson bar system, a sealed loading system and a data monitoring and control system, wherein the dynamic true triaxial electromagnetic Hopkinson bar system is used for acting on a simulated fault sample and simulating a true triaxial stress state and multi-axis and multi-direction power disturbance of an underground fault; the sealed loading system is used for pressurizing and injecting fluid into the simulated fault sample and sealing the fluid under dynamic and static combined loading of the simulated fault sample; the sealed loading system is matched with the dynamic true triaxial electromagnetic Hopkinson bar system to load dynamic disturbance to a simulated fault sample containing fluid, simulate a fault stress state in an underground engineering project involving fluid activity and perform a dynamic-fluid coupling effect induced earthquake simulation test. According to the invention, the true triaxial stress state and the multi-axis and multi-direction power disturbance of the underground fluid-containing fault can be simulated.

The invention relates to the technical field of corrugated pipe air tightness detection, and discloses an air tightness detection device and a detection method for corrugated pipe quality inspection.The air tightness detection device comprises a detection machine table, fixed installation assemblies are arranged at the two ends of the upper portion of the detection machine table, a movable supporting frame is arranged between the fixed installation assemblies, and a corrugated pipe is located above the movable supporting frame; the fixed installation assembly comprises a fixed installation mechanism and a sealed installation mechanism, the two ends of the corrugated pipe are connected with the fixed installation mechanism and the sealed installation mechanism correspondingly, and the pressurization assembly is arranged on one side of the sealed installation mechanism. An air supply mechanism is introduced into the sealed installation end of the corrugated pipe through an air inlet mechanism in the pressurization assembly, at the moment, one end of the corrugated pipe is compressed and fixed through a movable supporting frame, the end, close to the sealed installation end, of the corrugated pipe is in an extending state, and therefore all corrugations of the end, close to the sealed end, of the corrugated pipe can extend; airtightness detection is difficult to carry out on the area between the corrugations in the compressed state, and missing detection is avoided.

The utility model relates to the technical field of communication technology, in particular to a sealed optical cable insulation joint, which comprises a left sealing box, a left optical cable is inserted in the left sealing box, a right sealing box is arranged on the right side of the left sealing box, a right optical cable is arranged in the right sealing box, and a sealing mechanism is arranged on the outer wall of the left sealing box. And a clamping mechanism is arranged on the left side of the left sealing box. According to the utility model, the box body is sealed and fixed through the sealing mechanism, so that a part of devices can be in sealed butt joint with gaps of the box body, optical cables are clamped through the clamping mechanism, so that a part of devices can fix the optical cables on the side wall of the sealing box, and the sealing performance and the stability of the device are improved.

The invention relates to the technical field of storage tank safety devices, and discloses a storage tank breather valve which comprises a valve body, a pressure cavity is defined by the upper portion of an inner cavity of the valve body through a pressure end valve hole, a vacuum cavity is defined by the lower portion of the inner cavity of the valve body through a partition plate and a vacuum end valve hole, the lower end of the valve body is an air inlet, and a first sealing structure is arranged on the pressure end valve hole. A first sealing structure is arranged on the vacuum end valve hole, a second sealing structure is arranged on the vacuum end valve hole, each of the first sealing structure and the second sealing structure comprises a valve seat, a valve disc, a sealing membrane and a membrane fixing circular plate, more than two annular grooves are formed in the lower surface of the valve disc, and the sealing membrane is arranged on the lower surface of the valve disc and covers the annular grooves; the membrane fixing circular plate is arranged in the middle of the lower surface of the valve disc and used for pressing the membrane sealing piece, the valve seat is provided with more than two sealing pointed cones, and the sealing pointed cones and the annular grooves are arranged correspondingly. According to the storage tank breather valve, complete sealing can be achieved, and the zero-leakage sealing effect of the breather valve is achieved.

The invention relates to the technical field of charging piles, and discloses a charging pile with a charging port capable of being overturned and hidden, the charging pile comprises a charging pile main body, the inner wall of the charging pile main body is rotatably connected with a maintenance door, the inner wall of the maintenance door is fixedly provided with a gun rack, and the inner wall of the gun rack is connected with a charging gun in a clamping manner; a power line bin is fixedly assembled at the bottom of the charging pile body, a control screen is fixedly assembled on the outer wall of the charging pile body, and an emergency stop key is fixedly assembled on the outer wall, located at the bottom of the control screen, of the charging pile body. When a person drives a power line to move through a charging gun, the power line drives a power line copper pipe to move along a sliding groove, the power line copper pipe conducts extrusion pressure on a telescopic plate, data detected by a pressure sensor is transmitted to the charging pile body, the charging pile body controls a driving assembly, and the power line copper pipe is pushed through the driving assembly; the power line is pushed to move, so that the problem that the power line cannot be pulled from two sides of the equipment by personnel is solved.

The application provides a one-way sealing ring, a sealing mechanism, a tail pipe top packer and a tail pipe cementing process, wherein the one-way sealing mechanism comprises a center pipe, an upper deformed sleeve arranged on the outer wall of the center pipe, a lower deformed sleeve arranged on the outer wall of the center pipe, the upper deformed sleeve and the lower deformed sleeve being spaced apart in the axial direction, a sealing element arranged on the outer wall of the center pipe, the lower end of the sealing element being in abutment with the upper end of the lower deformed sleeve, an expansion cone arranged between the upper deformed sleeve and the sealing element, a sealing groove being arranged on the inner wall of the expansion cone in the circumferential direction, a sealing ring being arranged in the sealing groove, a flow-off groove being arranged on the inner wall of the expansion cone in the axial direction, the flow-off groove penetrating through the upper end and the lower end of the expansion cone, and fluid being allowed to flow only in one direction from the upper end of the expansion cone to the lower end of the expansion cone along the flow-off groove, while the fluid under the packer is allowed to flow upward, the wellhead annulus is allowed to be pressurized for cement setting, the pressure reduction caused by volume shrinkage is prevented to prevent the stratum fluid from flowing out, and the cementing quality is ensured.

The application discloses a kind of bathroom cabinet processing plate waste crushing recycling equipment, including crushing box, fixed blade is equidistantly arranged between the inner surface of longitudinal two sides of crushing box, two first rotary shafts are symmetrically arranged between the inner surface of transverse two sides of crushing box, rotary blade is cross arranged between the fixed blade of first rotary shaft, transmission gear is installed at one end of two first rotary shafts and passes through crushing box, transmission gear is engaged, and driving motor is arranged on the outer surface of transverse side of crushing box.The beneficial effects of the present application are:the present application is reasonable in design, and the overall structure is stable and firm, which can not only realize the crushing and recycling of plate waste generated during the production and processing of bathroom cabinet, but also avoid the floating of debris and dust generated during the crushing and recycling of plate waste to the surrounding air, ensure the air quality of surrounding environment and the health of operators, and the crushed plate waste can be filled into the storage tank for centralized treatment.

The utility model discloses a corrugated paperboard box that storage space can expand, including box body and positioning lid, the four side outer walls on the positioning lid all are fixedly connected with cotton wool area, the four side outer walls on the bottom of box body all are fixedly connected with the first barb area of corresponding cotton wool area, the both ends of top of box body all are fixedly connected with first end plate, the both sides of top of box body all are fixedly connected with second end plate, the outer side wall on the first end plate and second end plate all are fixedly connected with the second barb area of corresponding cotton wool area, this storage space can expand corrugated paperboard box, can utilize the box cover of box body as the edge board to increase the internal space of box body, simple structure, convenient operation is suitable for using widely.

The application is suitable for the technical field of garden robots, and provides a garden robot, which comprises a recycling part and a cover plate part, wherein the recycling part comprises a channel assembly and a recycling container, the recycling container is used for containing materials, an opening structure is arranged on the recycling container, the recycling container has a recycling state and a pouring state; the cover plate part comprises a movable cover plate, the movable cover plate is movably connected with the recycling container, and the movable cover plate has a reset state and a shifted state; in the process that the recycling container is switched from the recycling state to the pouring state, the movable cover plate can be switched from the reset state to the shifted state under the action of gravity of the materials in the recycling container or under the action of gravity of the movable cover plate itself. The movable cover plate of the garden robot provided by the application can be switched from the reset state to the shifted state under the action of gravity of the materials in the recycling container or the action of gravity of the movable cover plate itself when the recycling container is switched from the recycling state to the pouring state, manual switching is not needed, and the use experience is good.

The fireproof door with the smoke isolation effect comprises a door frame, the surface of a first rotating shaft is fixedly connected with a fireproof door plate, a sealing plate is installed in a lifting groove in a sliding mode, one side of the sealing plate is fixedly connected with a lifting pipe, and the interior of the lifting pipe is in threaded connection with a first threaded transmission rod. A first bevel gear is fixedly connected to the surface of the first threaded transmission rod, one end of a second rotating shaft penetrates through the fireproof door plate and is fixedly connected with a second bevel gear, the second bevel gear is in meshed connection with the first bevel gear, the other end of the second rotating shaft is fixedly connected with a screwing rod, sealing grooves are formed in the two faces of the top and the two faces of the bottom of the door frame, and the sealing plate is matched with the sealing grooves. The fireproof door has the advantages that through meshing connection of the first bevel gear and the second bevel gear, the first threaded transmission rod drives the lifting pipe and the sealing plate at the two ends to move up and down by rotating the screwing rod, the sealing plate is installed in the sealing groove in a sliding mode, a gap between the fireproof door plate and a door frame is sealed, and smoke is prevented from entering from the gap.

The utility model belongs to the technical field of steam ovens, and particularly relates to a self-cleaning oven which comprises an oven body, a steam system, a lighting system, a heating pipe system and a control system. The steam system comprises a boiler device which is installed on the rear side of the inner container and used for converting water into steam and providing the steam into the inner container to heat food; the boiler device comprises an air inlet pipe leading to the interior of the inner container, an air inlet pipe installation hole is formed in the inner container, the air inlet pipe is arranged in the air inlet pipe installation hole in a penetrating mode, a connecting piece is arranged at the end of the air inlet pipe, and an air inlet pipe sealing piece is arranged between the connecting piece and the side wall of the inner container and made of high-temperature-resistant materials. The connecting piece and the inner container are connected through the air inlet pipe fixing piece, so that the connecting piece enables the air inlet pipe sealing piece to abut against the inner container located on the edge of the air inlet pipe installation hole, the gap between the air inlet pipe and the inner container is sealed, air leakage of the inner container is avoided, the stability of the inner container during working is guaranteed, and normal operation of the steaming oven is guaranteed.

The utility model discloses a PP pipe fitting connecting device relates to pipe fitting connection technical field, including fixed pipe, connector and No.1 fixer, fixed pipe both ends are equipped with the connector, the inner wall of connector is equipped with spacing ring, the inner wall of connector is equipped with a plurality of guide wheel, and the fixed pipe is equipped with the fixed pipe. A plurality of bolts are installed on the outer wall of the connector in a penetrating mode, the bolts, the guide wheels and the insertion rods are connected through cables, and a first fixator is installed on the outer wall of the fixing pipe. Connection can be conveniently carried out by installing the connector, when connection is carried out, one end of a pipeline is inserted into the connector, at the moment, the supporting spring and the tough plate deform and are attached to the outer wall of the pipeline, the pipeline is preliminarily sealed, then the pipeline enters the limiting position, at the moment, the bolt is rotated, the bolt rotates to drive the cable to contract, and then the pipeline is sealed. And one end of the insertion rod is sharp, and the insertion rod is used for fixing the pipeline, so that a fixing function is realized.

The invention provides a sealing gas circuit which extends between the low-pressure end of a gas compressor and a sealing cavity and comprises a high-speed shaft inner channel. The high-speed shaft inner channel is limited in the high-speed shaft by the pipe wall of the high-speed shaft, and a pressurizing structure protruding inwards is arranged on the inner side face of the pipe wall.

The gear selecting mechanism with the oil seal solves the technical problems that an existing gear selecting mechanism of a gearbox is prone to rusting and clamping stagnation, and the gear selecting mechanism of the gearbox is complex in structure and inconvenient to assemble and disassemble when adopting a waterproof structure. According to the utility model, the design is carried out from five aspects of preventing the exposed metal part from rusting, preventing the exposed metal part from being directly matched and contacted, reducing the number of parts and reducing the cost, the oil seal is used for preventing water from entering the gear-selecting shaft hole of the window cover, and the clamping stagnation or the gear-selecting difficulty caused by rusting at the shaft / hole matching part is avoided; the dust cover is used for preventing dust and large-particle impurities in air or water from being accumulated, so that the oil seal is protected; the clamping spring is used for ensuring reliable connection and flexible and light rotation of the gear selecting shaft; adjustment is carried out on an original gear selecting mechanism, main body parts are mutually used, the types of new parts are reduced, and the production cost is controlled.

This utility model relates to the field of urea injectors, specifically disclosing a liquid inlet cap sealing structure for a urea injection assembly, including: a water jacket assembly, a valve body, a liquid inlet cap, and a sealing part. The valve body is composed of a wiring part, a coil part, and a liquid inlet pipe. The sealing part can be either a sealant with an integral filling structure or a component consisting of a first sealing ring and a second sealing ring for sealing. After sealing, it can prevent cooling water or external immersion water from seeping into the gaps between the wiring part and the liquid inlet pipe, as well as the gaps between the wiring part and the coil part, thus preventing water from entering and damaging the coil part and wiring part, thereby extending the service life of the valve body and reducing the failure rate.

The application discloses an anchor rod structure, a construction method of the anchor rod and an anchor rod body formed by the construction method. The anchor rod structure comprises a bus base material, a tension structure and a fixing structure. The fixing structure is located at the lower end of the bus base material and is used for anchoring the lower part of the anchor rod structure. The tension structure is located at the upper end of the bus base material and is used for tensioning and locking the bus base material. The outside of the bus base material is provided with an isolation structure. The inside of the isolation structure and the outside of the bus base material form a first annular structure. The anchor rod structure further comprises a side grouting pipe. The side grouting pipe extends from the top of the anchor rod structure to the bottom. The bottom of the side grouting pipe is communicated with the bottom of the first annular structure. The internal space defined by the first annular structure and the side grouting pipe is isolated from the outside of the isolation structure and the side grouting pipe, and forms a secondary grouting and back discharge channel. Therefore, the problem of water seepage of the anchor rod in the later period can be solved, and the difficulty of water stopping in the later period and the engineering cost can be solved.

The present disclosure relates to a cutterhead assembly and a slurry shield tunneling machine. The cutterhead assembly comprises a cutterhead (10), an electrode mounting seat (20) arranged on the cutterhead (10) and having a first through hole (21) penetrating through the thickness direction of the cutterhead (10), an emitting electrode (30) having a first electrode portion (31) and a second electrode portion (32), the first electrode portion (31) penetrating through the first through hole (21), the second electrode portion (32) being fixedly connected to the electrode mounting seat (20) through a first connecting piece (41), and a first sealing and insulating assembly (50) being compressed between the emitting electrode (30) and the electrode mounting seat (20) and between the emitting electrode (30) and the first connecting piece (41) to insulate and seal the emitting electrode (30) from the electrode mounting seat (20) and the first connecting piece (41).

The application provides a downhole supercritical carbon dioxide fracturing coal rock device and a construction method, which comprises a coal seam, a fracturing borehole, a hole blocking section, a hole sealing section, a fracturing section, a monitoring hole, a fracturing system, a temperature control system, a grouting system, a liquid carbon dioxide pressurizing system, a proppant mixing system, an extraction system and a data collector; the fracturing borehole is arranged on the coal seam and comprises the hole blocking section, the hole sealing section and the fracturing section; a plurality of monitoring holes are arranged on the coal seam and are spaced apart in the circumferential direction of the fracturing borehole; and the fracturing system is connected with the temperature control system. The proppant mixing system can improve the performance of the liquid carbon dioxide carrying proppant mixture, so that the proppant mixture effectively enters the fracturing fracture and maintains good flow conductivity. The temperature control system overcomes the difficulty in preparation of downhole supercritical carbon dioxide and can realize injection of carbon dioxide in a supercritical state into the fracturing coal seam.

The utility model relates to a leakproof copper pipe for a cooler, which comprises a copper pipe, a connecting pipe, a sealing block I provided with a water outlet hole I in the side wall, a sealing block II corresponding to the sealing block I and provided with a water outlet hole II in the side wall, and a sealing slide block connected with the sealing block I in a rotating manner on the copper pipe and the sealing block II in a rotating manner on the connecting pipe, the sealing sliding block is slidably connected to the first sealing block in the circumferential direction of the center point of the first sealing block, the fixing block is fixedly connected to the second sealing block, and the sealing sliding block is provided with a positioning groove allowing the fixing block to enter and a tensioning and fixing mechanism. The copper pipe and the connecting pipe do not need to be sealed by personnel through a raw material belt, that is, the situation of liquid leakage caused by too little winding of the raw material belt does not need to be worried about, and the copper pipe and the connecting pipe can be sealed.

The utility model belongs to the technical field of pipe shed steel frame, concretely relates to a mine laneway fabricated pipe shed steel frame, including steel pipe and grouting expansion assembly, is equipped with overflow booster hole on the side of steel pipe located in one side of steel pipe grouting hole, grouting expansion assembly is sleeved on the steel pipe outside overflow booster hole, grouting expansion assembly is composed of rubber expansion ring, fixed ring, temperature sensing lock ring, both ends of rubber expansion ring are clamped in the inside of fixed ring, and one end of temperature sensing lock ring is clamped and connected between the outside surface of rubber expansion ring and fixed ring, the other end of temperature sensing lock ring is formed with deformation compression section. Grouting expansion assembly is added to the outer wall of steel pipe, realizes slurry pressure trigger type plugging, with the two-stage sealing mechanism of slurry pressure expansion and temperature control locking, solves the problem that slurry flows back and seeps from the gap between pipe wall and aperture.

The application relates to a plate-to-plate connector tape changing machine which comprises a platform, a conveying frame, a conveying frame, a tape tearing assembly, a transfer assembly and a heat sealing assembly, the conveying frame and the conveying frame are fixedly connected to the upper end of the platform, the upper end of the conveying frame is provided with a conveying groove, the upper end of the conveying frame is provided with a conveying groove, the length direction of the conveying groove is parallel to the length direction of the conveying groove, the conveying groove is used for conveying old packaging materials, the conveying groove is used for conveying new packaging materials, the tape tearing assembly, the transfer assembly and the heat sealing assembly are fixedly connected to the upper end of the platform, the tape tearing assembly is used for winding old upper tapes, the transfer assembly is used for transferring products in the conveying groove to the conveying groove, and the heat sealing assembly is used for heat sealing new upper tapes. Old packaging materials are conveyed in the conveying groove, the tape tearing assembly winds the old upper tapes to expose the products, new packaging materials are conveyed in the conveying groove, the transfer assembly transfers the products from the old packaging materials to the new packaging materials, the heat sealing assembly fixes the new upper tapes and the new packaging materials, the products are sealed, the tape changing of the products is completed, and the packaging efficiency is improved.

This application discloses a waterproof pipe gallery structure, belonging to the field of pipe galleries. The waterproof pipe gallery structure is constructed by sequentially splicing multiple pipe bodies. The structure includes: a shielding ring fitted at the joint of two adjacent pipe bodies, the shielding ring being slidable on the pipe body; elastic sealing rings fitted on both adjacent pipe bodies, the elastic sealing rings being located on both sides of the shielding ring; and sliding cylinders covering each of the elastic sealing rings, each sliding cylinder being threadedly connected to the shielding ring. This waterproof pipe gallery structure reduces water seepage at pipe gallery joints and facilitates connection.

The invention relates to a preparation method of a phosphorus defect bimetallic oxygen evolution catalyst. The preparation method comprises the following steps: S1, dissolving 2.4 mmol of nickel chloride hexahydrate, 0.8 mmol of vanadium chloride and 300mg of urea in 80ml of deionized water, and uniformly stirring for 10 minutes; s2, putting a product obtained in the step S1 and foamed nickel into a 100ml reaction kettle, reacting at 120 DEG C for 12 hours, and drying in a drying box after reaction; s3, putting the product in S2 and 0.8 g of sodium dihydrogen phosphate into a tubular furnace, heating to 350 DEG C at a heating rate of 3 DEG C / min in an argon atmosphere, and reacting for 3 hours to obtain nickel vanadium phosphide loaded foamed nickel; and S4, the product obtained in the S3 is put into a sodium borohydride solution to be soaked for 30 min, the product is taken out and dried, and a final product, namely the nickel vanadium phosphide loaded foamed nickel with the vacancy defect, is obtained.

This utility model relates to the field of sealing structure technology, specifically an adaptive sealing structure, including a cylinder. A fixing plate is fixedly sleeved on the outside of the cylinder. Both sides of the fixing plate are connected to L-shaped sealing gaskets, which are fitted onto the outside of the cylinder. Several springs are arranged on both sides of the outer wall of the fixing plate, with the other end of each spring fixedly connected to the side of the sealing gasket parallel to the fixing plate. A rigid metal plate is embedded inside the side of the sealing gasket parallel to the fixing plate, and a flexible rubber gasket is located on the side of the sealing gasket perpendicular to the fixing plate. Multiple fixing components are arranged around the circumference of the outer wall of the cylinder. This adaptive sealing structure solves the problem that existing sealing structures lack adaptive capability, and in actual use, thermal expansion and contraction can affect their sealing performance, leading to pipeline leaks and significant limitations in application.

The application discloses a butterfly valve with good sealing performance, and belongs to the field of valves. The butterfly valve with good sealing performance comprises a valve body, a valve rod rotatably installed on the valve body, and a butterfly plate connected with the valve rod. The butterfly plate comprises a butterfly frame, side plates connected to the butterfly frame, a cutoff plate slidingly connected to the butterfly frame, and a flexible connecting piece connected between the butterfly frame and the cutoff plate. The butterfly frame is fixedly connected to the valve rod. An inner wall of the valve body is provided with a sealing ring for abutting against the cutoff plate. The inner diameter of the sealing ring gradually decreases from a side close to the butterfly plate to a side far away from the butterfly plate. The butterfly frame is internally provided with a moving mechanism for driving the cutoff plate to move axially along the valve body. The valve rod is provided with an adjusting mechanism for controlling the operation of the moving mechanism. The application has the effect of improving the durability of the butterfly valve and improving the sealing performance of the butterfly valve.

The utility model relates to the field of glue brushing devices, in particular to a glue brushing device based on GRG hyperboloid gradient diffuser surface treatment. The utility model provides the glue brushing device based on GRG hyperboloid gradient diffuser surface treatment, which is convenient to flexibly combine and use. Comprising a liquid storage box, a brush and pressing pieces, the detachably combined brush is assembled on the lower portion of the liquid storage box through a mounting groove, clamping grooves used for mounting the pressing pieces are formed in the inner wall of the mounting groove at intervals, and the pressing pieces are used for axially clamping and limiting the assembled brush. By the adoption of the structure of the extensible spliced single brush assemblies and the T-shaped installation grooves, rapid combination and installation of the multiple single brushes are supported so that the brushes with different wide faces can be achieved through combination, liquid guide grooves between the brushes with the different wide faces can be sealed through the synergistic effect of spring clamping blocks of pressing pieces and sealing gaskets, and use is flexible and convenient; stepless adjustment of the brushing angle is achieved by pressing the button, so that an operator can complete continuous glue brushing operation of a complex curved surface in a single-hand holding state.

The utility model relates to the field of air purifiers, in particular to a unit type ultraviolet air purifier cleaning structure. The technical problems that cleaning brushes arranged on the two sides of a filter plate are adopted for cleaning the filter plate, during cleaning, the filter plate can be cleaned only after the air purifier is stopped, and the filter plate is inconvenient to use for places where air needs to be purified for a long time; according to the technical scheme, the unit type ultraviolet air purifier cleaning structure comprises a sealing assembly, a lifting assembly and a cleaning assembly; compared with the prior art that cleaning brushes arranged on the two sides of a filter plate are adopted to clean the filter plate, the air purifier needs to be stopped to clean the filter plate during cleaning, and the air purifier is inconvenient to use for places where air needs to be purified for a long time; according to the filtering structure, through cooperation of the sealing structure and the cleaning structure, the filtering plates can be cleaned in a segmented mode, and therefore when the air purifier works, the filtering plates can be cleaned, shutdown cleaning is not needed, and using is more convenient.

The application belongs to the field of fastener quality inspection, and particularly relates to a sleeve air tightness detection device, which comprises a rack, a linear reciprocating mechanism and an air tightness detection mechanism; wherein the rack is provided with a positioning base for placing one end of a workpiece to be detected with a plug; the execution end of the linear reciprocating mechanism is provided with a gas supply pressure head for plugging the end of the workpiece to be detected away from the plug; the air tightness detection mechanism comprises a controller, a pressure controller connected to a corresponding pipeline, a pressure switch and an electromagnetic valve, and the pressure controller, the pressure switch and the electromagnetic valve are in communication connection with the controller. The sleeve air tightness detection device can replace the traditional manual detection mode, significantly improve the detection quantity per unit time, adopt a standardized detection process and a high-precision sensor, avoid misjudgment or missed detection caused by inconsistent human judgment, reliably detect the sleeve with air leakage defects, and prevent defective products from flowing into subsequent processes or causing faults in field use.

The invention belongs to the technical field of air duct valves, and discloses a high-air-tightness air valve which comprises a valve frame and a plurality of rotating shafts and valve blades with the same number, the valve blades are divided into middle blades and side blades according to mounting positions, and the number of the rotating shafts is even; different from the mode that multiple blades synchronously rotate in the same direction and then are in lap joint to achieve sealing, sealing is conducted by innovatively utilizing inserting connection between the blades, the valve blades of the even number are arranged, rotating shafts of the valve blades are equally divided into two sets at the odd number position and the even number position, and the two sets of rotating shafts are connected through two sets of connecting rod mechanisms; synchronous and same-direction rotation of each group of rotating shafts is realized; the sealing structure is arranged between the two blades, so that the sealing performance between the two blades is effectively improved, complete sealing of the air valve is achieved, air circulation is effectively blocked, the resistance of the blades to air pressure is enhanced, and the sealing structure is internally coated with a fireproof material, so that the air valve has efficient fireproof capacity.