53results about How to "Reduced tightness" patented technology

The invention discloses an air tightness adjustable heat preservation structure and method for connection of a prefabricated composite wall and a broken bridge door and window, and relates to the technical field of civil engineering, the air tightness adjustable heat preservation structure comprises a composite wall body, and is characterized in that an assembly groove is formed in the composite wall body, a fixed base is arranged in the assembly groove, and a door and window body is installed on the fixed base; a mounting groove is formed in the side, facing the door and window body, of the fixed base, a heat preservation assembly is arranged in the mounting groove, and the heat preservation assembly is attached to the bottom of the door and window body in a sealed mode. A built-in adjusting assembly is further arranged in the mounting groove, and the built-in adjusting assembly is connected with the heat preservation assembly and used for adjusting the sealing tightness of the heat preservation assembly. The sealing structure has the beneficial effects that the design of the inflatable closed rubber pipe is adopted, so that the inflatable closed rubber pipe expands and compresses a gap between the composite wall body and the door and window main body, the air tightness is adjustable, and the sealing performance reduction caused by material deformation or aging can be automatically compensated.

This utility model relates to a connection structure between the inner liner and heating plate of a vacuum electric heating cup, including an inner liner shell, an inner liner bottom cover, and a heating plate. The heating plate is fixedly disposed at the lower end of the inner liner bottom cover. It also includes a connecting sleeve, which is fixedly disposed at the lower end of the inner liner shell. The connecting sleeve and the inner liner shell are an integral structure. The upper end of the inner liner bottom cover is fixedly connected to the transition area between the connecting sleeve and the inner liner shell. Both the inner liner bottom cover and the heating plate are located within the connecting sleeve. This design reduces welding points, thereby lowering process complexity and vacuum sealing risks, and improving overall sealing performance and structural stability.

The invention relates to the technical field of fluid conveying pipelines, and discloses a bundled metal hose which comprises a bundled metal hose body, connector assemblies are installed at the two ends of the bundled metal hose body respectively, a plurality of small-diameter thin-wall stainless steel wire pipes are selected as basic units of the bundled metal hose body, and the outer diameter phi of each stainless steel wire pipe is smaller than 5 mm. The wall thickness is 0.1-0.2 mm, the bundling metal hose is made of one of 304 stainless steel and 316 stainless steel, a first welding spot and a second welding spot are arranged at the two ends of the bundling metal hose respectively, and the two ends of the bundling metal hose are welded to the two connector assemblies through the first welding spot and the second welding spot respectively. A plurality of small-diameter thin-wall stainless steel wire pipes are bundled to form the hose main body, so that the inherent defects of a traditional corrugated metal hose are fundamentally overcome; firstly, fluid pressure is uniformly dispersed to each independent wire tube through the bundling structure, the stress concentration phenomenon of a traditional corrugated structure is avoided, and the overall compression strength and anti-fatigue performance are remarkably improved.

The utility model relates to valve technical field, and disclose a kind of pressure reducing type backflow preventer, including valve body, drain valve seat, drain valve flap, long valve rod, fixed screw, valve cover, the valve body is provided with drain valve seat, the drain valve seat inside is provided with drain valve flap, the drain valve flap upper side is provided with long valve rod, the valve body upper side is provided with valve cover.The pressure reducing type backflow preventer, by first valve seat, first valve flap, first main valve rod, first spring seat, first spring and first hexagon nut are assembled to it before being loaded into valve body, subsequent and present an integral loading into valve body inside, greatly shorten assembly time, also suitable for the assembly in the valve body of smaller volume, the unique flow passage design of two-stage check valve, small flow resistance, open and close speed is fast, can effectively prevent the damage of sudden back pressure rise to valve and pipeline, limit pressure water backflow or siphon backflow, with mute function, effectively prolong the service life of valve.

The EGR valve with the excellent sealing performance comprises a valve body, a motor assembly, a valve rod, a valve rod transmission assembly and a valve plate, a motor cavity and an air cavity are formed in the valve body, the motor assembly is installed on the motor cavity, one end of the valve rod is in linkage with the motor assembly through the valve rod transmission assembly, and a return spring is further arranged in the valve body. The other end of the valve rod is connected with the valve block, a valve seat is installed at the air inlet end, corresponding to the air cavity, of the valve body, and an exhaust pipe is installed at the air outlet end, corresponding to the air cavity, of the valve body. The sealing assembly is arranged between the corresponding motor cavity and the air cavity in the valve body and used for sealing the outer wall of the valve rod and the inner wall of the valve body, the sealing assembly comprises a first sealing ring and a first sealing scraping piece, and the first sealing scraping piece is tightly attached to the side, close to the valve plate, of the first sealing ring. The sealing doctor blade is additionally arranged on the sealing ring between the valve rod and the valve body to protect the sealing ring, so that the service life of the sealing ring is prolonged, and a good protection effect on the internal sealing performance of the motor is achieved.

This utility model discloses a plate heat exchanger with a reinforcement device, comprising: a heat exchange core formed by stacking multiple heat exchange plates sequentially, a reinforcement device disposed on the outside of the heat exchange core, the reinforcement device comprising oppositely arranged reinforcement components, each set of reinforcement components comprising a transverse reinforcement member and a longitudinal reinforcement member, the transverse reinforcement member being disposed along the width direction of the heat exchange core and abutting against the edge of the heat exchange plate, the longitudinal reinforcement member being disposed along the height direction of the heat exchange core and having both ends connected to the transverse reinforcement member, the transverse reinforcement member and the longitudinal reinforcement member forming a reinforcement frame to apply radial constraint force to the heat exchange core. By the transverse reinforcement member and the longitudinal reinforcement member of the reinforcement device enclosing and forming a reinforcement frame, the radial constraint force applied to the heat exchange core can effectively resist the impact of fluid pressure fluctuations on the heat exchange core, reduce the overall shaking or dispersion of the core formed by stacking multiple heat exchange plates due to uneven force, and significantly improve the overall structural stability of the heat exchange core.

This utility model discloses a dual-function over-ear headphone, relating to the field of headphones. It includes a headband, with an earphone body connected to the bottom of the headband. A sponge pad is connected to the side of the earphone body, and a microphone is installed on the side of the earphone body away from the sponge pad. A mounting groove is formed on the side of the mounting groove, and a miniature air pump is installed inside the mounting groove. The output end of the miniature air pump is connected to a connecting pipe, which passes through and connects to the side of the airbag ring. A compression ball slides inside the telescopic groove. In this dual-function over-ear headphone, the airbag ring can expand inside the mounting groove after being supplied with gas. When the airbag ring expands, it can compress the side walls of the waterproof membrane and waterproof mesh fabric, improving the sealing effect of the earphone body. When the sponge pad is pulled, it can cause the sliding block to slide out of the L-shaped groove, and at the same time, the fixing block will also slide out of the surface of the fixing ring, allowing the sponge pad and the earphone body to be separated and disassembled, improving the convenience of using the headphones.

The utility model relates to the technical field of coupler discloses a motor with magnetorheological fluid transmission device, including base, the inside fixedly connected with motor body of base, the output end connected with connecting shaft of motor body, the outer wall rotationally connected with condensate tank of connecting shaft, the inside of condensate tank is provided with shell no.

This invention relates to the field of underground gas storage technology for compressed air energy storage power stations, specifically to a large-size sealed door structure for high-pressure underground gas storage. It includes a sealed door, a sealing ring fixing steel plate, a first sealing ring, and a second sealing ring. A maintenance passage is provided inside a reinforced concrete plug. The sealed door is connected to the reinforced concrete plug via a sealing door support hinge. The maintenance passage is connected to the gas storage through the sealed door. The sealing ring fixing steel plate is fixed between the sealed door and the reinforced concrete plug. Both the first and second sealing rings are interference-fitted between the sealing ring fixing steel plate and the sealed door, with the first sealing ring positioned outside the second sealing ring. The sealed door structure is simple, adaptable to complex operating conditions, and ensures durability and reliability. It employs conventional sealing methods to form two seals, creating a double-layered protective barrier, resulting in good sealing performance, simple maintenance, and low repair costs.

The utility model relates to an inflation pump control box, including box body and a plurality of set up in the inflation pipeline subassembly of box body, and the inflation pipeline subassembly includes air pump, main gas pipe, a plurality of branch gas pipe, silencer and a plurality of air pressure sensor, and air pump is installed in the box body through mounting seat, and main gas pipe is connected with air pump and communicates, and a plurality of branch gas pipe and silencer are installed in the box body through vertical board, and are connected with main gas pipe through air valve door and communicate, and the side of each branch gas pipe away from main gas pipe is installed on the box body through quick detach three ways and is connected with the outside of box body and communicates, and a plurality of air pressure sensor correspond with branch gas pipe, and each air pressure sensor is connected on quick detach three ways of corresponding branch gas pipe through connecting pipe, and communicates with corresponding branch gas pipe through connecting pipe, quick detach three ways, the utility model discloses inflation pump control box is small, can monitor gas pipe pressure.

This utility model discloses a snap-fit ​​automotive lamp mounting structure that facilitates assembly and disassembly, belonging to the field of automotive lamp mounting. The snap-fit ​​automotive lamp mounting structure includes a lamp body and a fixing ring. A fixing shell is fixed to the rear side of the lamp body. The fixing ring is fixedly connected to the vehicle frame. A positioning mechanism is provided on the fixing ring, and a docking seat is connected to the positioning mechanism. The positioning mechanism is used to rotate the docking seat and lock it. A connecting mechanism is provided inside the fixing shell, and a claw is provided on the connecting mechanism. The connecting mechanism is used to rotate and reset the claw. This utility model solves the problem that existing automotive lamp mounting structures are inconvenient to assemble and disassemble, and the clips are prone to breakage during assembly and disassembly. This utility model adopts a cooperative structure of claw and positioning seat, which allows the claw to be pre-released by rotating the positioning seat during assembly and disassembly, enabling the claw to slide out smoothly, thereby significantly reducing the resistance during assembly and disassembly.

A method for adjusting the nozzle water flow in a tail gas absorption tower. Traditional tail gas absorption tower nozzle assemblies have the advantages of simple structure and convenient installation, but they still have their shortcomings. The method of the present invention is as follows: when it is necessary to adjust the water flow rate according to the tail gas emission speed in the tail gas absorption tower, a motor (501) can drive a first rotating shaft (502) to rotate. The first rotating shaft (502) drives a secondary bevel gear (504) to rotate through a main bevel gear (503). The secondary bevel gear (504) drives a rotating wheel (506) to rotate through a second rotating shaft (505). This causes the holes on the rotating wheel (506) and the holes on the fixed wheel (509) to intersect, allowing water to pass through. The size of the intersection of the holes directly affects the water flow rate, thereby controlling the nozzle water flow rate.

The application provides a sealing device, relates to the technical field of sealing, and aims to solve the technical problem of the failure risk of a spring energy storage sealing ring under extremely high and low temperatures. The sealing device comprises a sealing piece and an elastic assembly. A first sealed body is sleeved on the outside of a second sealed body and forms an annular cavity. The sealing piece is arranged in the annular cavity, and the sealing piece is in contact with a first sealing surface of the first sealed body and a second sealing surface of the second sealed body. The radial distance between the first sealing surface and the second sealing surface can be adjusted in a first direction. The elastic assembly is arranged at the bottom of the sealing piece. The elastic assembly is configured to provide elastic force to the sealing piece when the temperature changes, so that the sealing piece moves in the first direction. The sealing device provided by the application can reduce the failure risk of the sealing piece under extremely high and low temperatures.

The utility model provides a dialysis tube air kettle positive pressure on-line detection device, which solves the problems of scrapping, waste, low efficiency and the like existing in a traditional bubble method, remarkably improves the product quality control level, the production efficiency and the safety, and comprises at least one group of positioning jacking components, at least one group of positioning jacking components, at least one group of positioning jacking components and at least one group of positioning jacking components, comprising a position sensor and a jacking driving part, the position sensor is used for identifying the air kettle reaching the detection station, and the jacking driving part is used for lifting the identified air kettle away from the conveying line to a preset detection height; the sealing butt joint assembly comprises a linear driver arranged in the lateral direction of the detection hole site and a sealing joint connected to the execution end of the linear driver, and the linear driver is used for driving the sealing joint to move in the horizontal direction so as to be inserted into a side wall interface of the lifted air kettle; the air pressure detection assembly is connected with the sealing connector through a pipeline, and the controller is in signal connection with the air pressure detection assembly, the position sensor, the jacking driving piece and the linear driver.

This invention relates to the field of fire valve technology, specifically to a marine fire valve with a double-sealing structure. It includes a fire valve body with a ball cavity containing a spherical valve. One side of the spherical valve blocks a transverse cavity in the fire valve body, and the adjacent side of the spherical valve blocks a vertical cavity. Both sides of the spherical valve are connected to directional shafts for rotation, and each directional shaft corresponds to a worm gear. The fire valve body has a manually adjustable main shaft. The fire valve has two pipe ports, each with a valve to restrict unidirectional fluid flow. Fluid flowing through the fire valve in any direction can be intercepted. By controlling the ball valve to rotate half a turn, an L-shaped water pipe connects the transverse and vertical cavities, thus opening the fire valve passage and allowing fluid to be delivered.

The invention relates to the technical field of oil well pipelines, in particular to an oil well pipeline anti-leakage sealing protection device and a using method thereof. According to the technical scheme, the oil well pipeline anti-leakage sealing protection device comprises a first pipeline protection ring, a second pipeline protection ring, a third pipeline protection ring, an inner clamping adjusting assembly, a pressure relief sealing protection assembly and a slow flow filter plate; the inner clamping adjusting assemblies are arranged on the inner sides of the first pipeline protection ring, the second pipeline protection ring and the third pipeline protection ring and can be used for being matched with the pipeline diameter to increase the sealing performance, and the pressure relief sealing protection assemblies are distributed on the first pipeline protection ring, the second pipeline protection ring and the third pipeline protection ring. The device can be used for pressure relief early warning protection, and the whole pipeline sealing protection effect is improved.

The utility model discloses a double-channel grading sealing gasket structure of a pipeline repairing device, which relates to the technical field of pipeline repairing devices and comprises an upper shell of the pipeline repairing device, a lower shell of the pipeline repairing device and two groups of sealing gaskets, and the two groups of sealing gaskets are respectively arranged on the inner walls of the upper shell and the lower shell; the sealing gasket comprises two gasket body straight edge sections, two outer arc edge sections and two inner arc edge sections, the two outer arc edge sections and the two inner arc edge sections are connected between the two gasket body straight edge sections, the two outer arc edge sections are arranged at the two ends of the two gasket body straight edge sections, and the two inner arc edge sections are arranged on the inner sides of the two outer arc edge sections and do not make contact with the outer arc edge sections. The inner ring radius of the inner arc edge section is larger than the inner ring radius of the outer arc edge section, when the pipe diameter of the pipeline has negative tolerance, sealing can be achieved through the outer arc edge section, when the pipe diameter of the pipeline is standard, the outer arc edge section is excessively compressed, the inner arc edge section is normally compressed, and the overall internal stress of the outer arc edge section and the inner arc edge section is improved. The sealing performance of the sealing gasket can be prevented from being sharply reduced, and the service life is prolonged.

The utility model relates to the field of bathroom equipment discloses a washing machine drainage floor drain core and contain floor drain structure of this washing machine drainage floor drain core, wherein floor drain core includes core body and flap, is provided with water inlet and second drain on the core body, the flap covers and shields second drain, and the water inlet and second drain form second drainage channel in the core body inside communication, still be provided with flow guide pipe, baffle and first drain on the core body, baffle sets up between flow guide pipe and core body inner wall, and flow guide pipe is fixed in the core body through baffle, and the bottom of flow guide pipe forms first drainage channel with first drain communication, and first drainage channel and second drainage channel are independent drainage respectively. The utility model discloses through optimizing the structure of floor drain core, makes floor drain core to have washing machine drainage and ground drainage two independent drainage channel simultaneously, and two drainage channels all have normal insect prevention and peculiar smell prevention function, has simple structure durable, low failure rate and the advantages such as strong applicability.

The utility model relates to a milk mixer assembling structure which comprises a kettle body, and the outer diameter of the bottom of the kettle body is shrunk to form a reducing section. The fixing ring is arranged on the reducing section in a sleeving manner; the base covers the bottom of the kettle body; the base is connected with the fixing ring; one end, close to the kettle body, of the base is sunken to form a containing cavity; the heating disc is arranged in the accommodating cavity; wherein the outer diameter of the reducing section is gradually increased towards one end close to the heating disc, so that the outer vertical surface of the reducing section is inclined to form a first inclined surface; the fixing ring is arranged on the first inclined surface in a sleeving manner; an elastic piece is arranged in the accommodating cavity; the base supports the heating disc through the elastic piece. Through the elastic deformation of the elastic piece, the deformation difference value between the kettle body and the heating disc is compensated, the phenomena that due to the fact that the deformation amount of the kettle body and the deformation amount of the heating disc support are different, sealing of the milk mixing device fails, and the kettle body cracks are reduced, and the stability performance of the milk mixing device assembling structure is improved.

The utility model discloses a preservation box, and relates to the technical field of storage containers, the preservation box comprises a first box body, a second box body and a cover body, the opening of the first box body is circumferentially provided with a first convex block; the second box body can be partially contained in the first box body, a second protruding block is arranged at the opening in the circumferential direction, a contact structure is arranged on the lower surface of the second protruding block, when the second box body is contained in the first box body, the lower surface of the contact structure abuts against the first protruding block, and a first distance exists between the lowest end of the first protruding block and the lowest end of the second protruding block. A plurality of buckle assemblies are arranged in the circumferential direction of the cover body at intervals, a first clamping strip and a second clamping strip are arranged on one side of each buckle assembly, the second distance between the first clamping strip and the second clamping strip is equal to the first distance, the first clamping strip is used for clamping the first protruding block, and the second clamping strip is used for clamping the first protruding block or the second protruding block. The use flexibility and the sealing performance of the preservation box can be improved.

The invention discloses a graphene waste rare and precious metal dissolving reaction kettle device and a dissolving method. The graphene waste rare and precious metal dissolving reaction kettle device comprises a dissolving cavity, a feeding unit, a heating device, an ultrasonic generation device, a pH online monitoring sensor, a temperature online monitoring sensor, a flue gas online monitoring sensor, a discharging unit and a control unit. The inner wall of the dissolving cavity is coated with a graphene-containing anti-corrosion coating, the feeding port is provided with a feeding weight sensor and an adjusting valve, the first liquid inlet is provided with a first liquid inlet flow adjusting valve and a liquid inlet weight sensor, and the second liquid inlet is provided with a second liquid inlet flow adjusting valve and a flow sensor. The heating device and the ultrasonic generating device are suspended in a cavity or fixed on the top cover of the dissolving cavity according to requirements; the bottom double receiving disc guide rails are switched, and an air outlet is provided with a check valve; the control unit is connected with all the sensors and the execution piece, and feeding, temperature control, ultrasonic treatment, liquid drainage, cleaning and end point judgment are automatically completed. According to the invention, efficient dissolution of waste precious and rare metals is realized, automatic operation is realized, and labor intensity and cost are reduced.

This invention discloses an automatic assembly equipment for automotive panoramic sunroof glass, including a frame, an outer frame positioning assembly, a first glass detection assembly, a second glass loading assembly, a vacuum pickup suction cup, a glass detection component, an automatic screw-driving assembly, and a control system. The first and second glass loading assemblies are equipped with the vacuum pickup suction cup and the glass detection component, which detect the glass curvature during glass pickup or transfer. The glass detection component includes a measuring point limiting rod and a curvature detection component. The measuring point limiting rod cooperates with the vacuum pickup suction cup to position a reference measuring point, and the curvature detection component detects the height difference of the detection point. The automatic screw-driving assembly includes a hole position deviation detection component, a lateral movement mechanism, and a flexible locking mechanism. This assembly equipment has a high degree of integration, reduces repetitive positioning errors caused by workstation transfers, improves the assembly efficiency of panoramic sunroof glass, can detect and identify glass abnormalities early, and has high assembly efficiency and good assembly quality.

The utility model relates to water treatment equipment field, a horizontal ceramic flat plate membrane component, including support foot square tube and frame square tube, frame square tube forms the frame structure of rectangle, and four support foot square tubes are located at the corner of frame structure respectively, four support foot square tubes and the inside of frame square tube intercommunication, one of support foot square tube is as water production pipeline, another of support foot square tube is as aeration pipeline, and the rest two support foot square tubes are closed, install several aeration pipes in frame structure, and the inside of frame square tube is connected with the aeration pipe and the end, install the membrane group guard board of four periphery frames on frame structure top, install several ceramic membrane sheets in the inside vertical of membrane group guard board enclosure, and every ceramic membrane sheet all is provided with water collecting port, and the water collecting port is connected with water production pipeline through frame structure, the ceramic flat plate membrane component improves the pollution resistance, easy maintenance, structural stability, and high loading density.

The application provides an elastic sealing device, relates to the technical field of sealing, and aims to solve the technical problem that spring energy storage sealing rings have failure risks at extremely high and low temperatures. The elastic sealing device comprises a flexible sealing sleeve and a deformation assembly. The flexible sealing sleeve is annular, and comprises a body. The body is provided with a receiving groove, and a first sealing edge and a second sealing edge are formed on both sides of the body. The deformation assembly comprises at least a first elastic member and a second elastic member that are stacked together. The first elastic member and the second elastic member have different thermal expansion coefficients. The deformation assembly is arranged on the body and at least contacts part of the first sealing edge and part of the second sealing edge. The deformation assembly is configured to provide a tension or a contraction force to the body, so as to adjust the sealing force between the first sealing edge, the second sealing edge and a sealed body. The application provides the elastic sealing device for sealing a rotating shaft and a sealing seat.

The invention discloses an anti-scouring device and a mounting method. The anti-scouring device comprises a pile body, a sliding block, a plurality of bottom rods, a blocking part and a plurality of connecting rods. The pile body extends in the first direction, the pile body is sleeved with the sliding block, and the sliding block is slidably connected with the pile body. The multiple bottom rods are rotationally connected with the pile body and distributed in the circumferential direction of the first direction at intervals, the blocking parts are connected with the bottom rods, the connecting rod is provided with a first end and a second end which are oppositely arranged in the length direction of the connecting rod, the first end is rotationally connected with the side, away from the pile body, of the sliding block, and the second end is rotationally connected with the bottom rods. The anti-scour device is configured to have a gathering state and an unfolding state, in the gathering state, the blocking part is close to the pile body, in the unfolding state, the blocking part is away from the pile body, and the sliding block moves in the first direction, so that the anti-scour device is switched between the gathering state and the unfolding state. The self-state can be flexibly adjusted, development of scouring of the seabed around the pile is restrained, and the pile is low in cost, long in life cycle and high in adaptability.

This utility model relates to the field of cosmetic bottles, and in particular to a rotary lifting type center dispensing bottle. The rotary lifting type center dispensing bottle includes a rotating outer sleeve, a sliding inner cover, upper and lower center dispensing caps, and a bottle body. The upper part of the bottle body has a bottle mouth, which is threaded onto the sliding inner cover. The upper and lower center dispensing caps have sliding posts on both sides of their outer walls, and a dispensing hole in the center. The upper and lower center dispensing caps have walls including a first wall and a second wall. The outer side wall of the sliding inner cover has a sliding groove, with the first wall located inside the outer side wall of the sliding inner cover and the second wall located outside the inner side wall of the sliding inner cover. The sliding posts are engaged in slots with an angle. The inner wall of the rotating outer sleeve has a vertical slot, in which the sliding posts are engaged. An annular body is located outside the dispensing hole, and a plug is located in the middle of the sliding inner cover, which cooperates with the dispensing hole. The advantages of this utility model are: the three-pronged groove occupies less space than the cross-shaped groove, and the three-pronged groove has no obstructions on its outer wall, facilitating the dispensing of viscous liquids.

The utility model provides a kind of electric rice cooker of all-metal cooking cavity, including pot cover and the pot body with inner pot, the pot cover includes metal inner cover and sealing ring, the inner pot has inner pot flanging, the metal inner cover includes metal conduit arranged in plate body and first sealing surface arranged in the outer edge of the metal inner cover, the first sealing surface and inner pot mouth along or inner pot flanging are attached to form annular rigid sealing area, the metal conduit is arranged in plate body to form steam outlet to guide steam to discharge, the sealing ring has sealing portion around the outside of first sealing surface, and the sealing portion is in contact with inner pot flanging sealing. The electric rice cooker of the utility model can effectively reduce the food in the inner pot contact non-metallic parts, to improve user's use experience.

This utility model discloses a self-adjusting bellows-sealed circulating pump device, including a circulating pump body. The circulating pump body has a flow chamber inside, and an inlet and an outlet are respectively located at both ends. A motor is mounted on the top of the circulating pump body, and a pump shaft is mounted on the output end of the motor. A sealing chamber is located above the flow chamber. A first stationary ring and a second stationary ring are respectively installed at the top and bottom of the sealing chamber. A first rotating ring and a second rotating ring are respectively located on one side of the first and second stationary rings. A first bellows and a second bellows are respectively fitted onto the pump shaft on one side of the first and second rotating rings. This utility model enables the bellows to have an automatic adjustment function, allowing the pump to maintain a stable sealing effect under different operating pressures, preventing separation of the stationary and rotating rings, and preventing liquid leakage.

The application relates to the technical field of new energy automobile battery replacement, and specifically discloses a lock body mechanism for new energy automobile battery replacement, which comprises a fixed shell, a nut connected to the inner side of the lower end of the fixed shell through a bearing, and a clamping spring arranged in the inner side of the lower end of the fixed shell. A drop-proof ring is in contact with and supports the upper surface of the clamping spring. A supporting spring is arranged on the outer side of the nut between the upper surface of the drop-proof ring and the lower surface of the upper end of the nut. A pneumatic sealing mechanism is installed on the nut. The upper end of the fixed shell is fixedly connected with a guide pipe coaxial with the fixed shell. The inner side of the guide pipe is provided with guide grooves at equal angles. A fixing bolt penetrates through the guide pipe. The application can prevent dust and sand from entering the thread structure between the fixing bolt and the nut, thereby ensuring that the fixing bolt and the nut can stably and effectively work.