49results about How to "Stop the flow" patented technology

The invention relates to the field of dies, in particular to a forging die for a metal forge piece and a die design method.The metal forge piece is in a hollow cone shape and comprises a flange plate and a conical face located on the flange plate, and a through hole is formed in the conical face; the forging and pressing die comprises a female die and a male die which are oppositely arranged, forging and pressing protrusions are arranged on the female die and / or the male die, the height of the forging and pressing protrusions is 13-17 mm, and the hole diameter of the through hole is smaller than the diameter of the forging and pressing protrusions. According to the method, the average deformation, the underpressure value and the curved surface thickness of the forge piece can be effectively controlled to reach the ideal value range, the forging protrusions extrude materials in the forming process, more flange plate materials of the forge piece flow in, forming is more sufficient, and therefore it is ensured that the forge piece is formed in place, and meanwhile materials are saved.

The closure member is configured to avoid or reduce a leak rate on the relief valve. These configurations may include a primary seal and a secondary seal, the combination of which may significantly reduce flow exiting the device. The secondary seal may be embodied as a resilient member, such as a curved or pleated metal spring. The resilient member may be compressed and extended in response to the presence or absence of a load. The feature may maintain contact between the resilient member and the seat of the valve.

The utility model relates to the technical field of drainers, and discloses an efficient electromagnetic drainer which comprises a drainer pipe body and a processing assembly arranged on the side wall of the drainer pipe body, the processing assembly comprises a filtering mechanism arranged on the inner wall of the drainer pipe body, an auxiliary mechanism is arranged on the inner wall of the drainer pipe body, and the filtering mechanism is arranged on the inner wall of the drainer pipe body. One end of the auxiliary mechanism is connected with one end of the filtering mechanism, a pipe body water outlet block is fixedly installed on the side wall of the drainer pipe body, and the inner wall of the pipe body water outlet block is communicated with the interior of the drainer pipe body. The utility model solves the problems that the existing drainer can be quickly adjusted so as to adjust the flowing mode of water, but when the drainer is used, part of impurities or hair can enter the inner wall of the drainer, so that the drainer is blocked, and the water flowing mode is influenced. Therefore, the existing drainer has certain limitation when being used.

The application belongs to the technical field of engines and discloses an engine EGR pipeline. The first pipeline and the second pipeline are parallel to each other, the first pipeline is wavy, the first channel and the second channel in the first pipeline are alternately connected, the second pipeline is wavy, the third channel and the fourth channel in the second pipeline are alternately connected, the first auxiliary pipeline is connected at the wave trough where the first channel and the second channel meet, the first auxiliary pipeline extends along the first channel and communicates with the fourth channel, and the other end of the first auxiliary pipeline is bent towards the second pipeline; the second auxiliary pipeline is connected at the wave peak where the third channel and the fourth channel meet, the second auxiliary pipeline extends along the fourth channel and communicates with the first channel, and the other end of the second auxiliary pipeline is bent towards the first pipeline; the problem that the valve plate of the one-way valve is broken under impact in the prior art, resulting in the problem of engine cylinder pulling, is solved.

The invention relates to a gas-liquid separation device available for microgravity and lunar surface. The gas-liquid separation device comprises a gas-liquid separation cavity, a spiral flow guide structure, a metal net and two layers of porous media. The gas-liquid separation device is applied to a manned spacecraft environment control and life support system and is used for separating urine of astronauts from mixed gas-liquid fluid. A plurality of gas-liquid mixture inlets, an exhaust port and a liquid discharge port are formed outside the gas-liquid separation cavity, a spiral flow guide structure is arranged inside the gas-liquid separation cavity, and a layer of metal net is clamped between two layers of porous media below a flow guide plate. Gas-liquid mixed fluid enters the gas-liquid separation cavity through a plurality of inlet pipelines above and sequentially passes through the spiral flow guide structure, the metal net and the porous medium, finally liquid is discharged through a liquid outlet below the porous medium, gas in the gas-liquid mixed fluid is discharged through an exhaust port above the device, and gas-liquid separation in the urine mixed gas-liquid fluid is achieved.

The utility model discloses a nozzle mechanism of a special-shaped tank for mousse, and belongs to the technical field of mousse nozzles, the nozzle mechanism comprises a sealing cover, the upper end of the sealing cover is fixedly connected with a nozzle, a trigger is arranged at the position, close to the front end, in the nozzle, the front end of the nozzle is provided with a flow guide channel, and the outer surface of the flow guide channel is fixedly sleeved with a spraying cylinder; a mounting hole is formed in the position, close to the rear end, of the interior of the spraying barrel, a liquid inlet groove and a liquid outlet groove are formed in the position, located on one side of the mounting hole, of the interior of the spraying barrel, a penetrating through hole is formed in the position, located between the liquid inlet groove and the liquid outlet groove, of the interior of the spraying barrel, and an anti-dripping unit is arranged above the penetrating through hole; the connecting state of the penetrating through hole is adjusted through the arranged anti-dripping unit, and when the trigger is aged after being pressed for multiple times, the rebound effect becomes poor, and the trigger cannot rebound to the initial working position, the penetrating through hole is closed through the arranged anti-dripping unit, and mousse is prevented from dripping from the outlet.

The utility model discloses an enteral nutrition delivery and automatic pressure regulator, which relates to the technical field of medical instruments and comprises an infusion pump, an infusion mechanism is arranged outside the infusion pump and comprises a first infusion tube and two accommodating bags, and a pressure sensor is mounted on the outer surface of the first infusion tube. The outer surface of the pressure sensor is communicated with a three-way connecting pipe, and the inner wall of the three-way connecting pipe is communicated with two second infusion pipes. The infusion pump and the infusion mechanism are arranged in a matched mode, the pressure sensor can be installed on the intestinal tract indwelling catheter to monitor the intestinal tract pressure of a patient in real time, the nutrient solution input amount in unit time is adjusted according to the intestinal tract pressure, and therefore the internal intestinal pressure of the patient is controlled; subsequent pipe washing can be carried out without inserting and pulling out a nutrition conveying pipeline, enteral nutrition conveying and pipe washing are matched for use, the switching process is simple and convenient, and the convenience and practicability during use are improved.

The utility model relates to the field of singeing machines, and discloses a burning slag collecting device of a singeing machine, which comprises a support frame, a collecting mechanism and a blowing mechanism are arranged at the top of the support frame, the collecting mechanism comprises a burner, the outer wall of the burner is fixedly connected with the outer wall of the support frame, the top of the support frame is fixedly connected with a support cover, and the support cover is fixedly connected with the blowing mechanism. A dust suction pipe is fixedly connected to the top of the inner wall of the supporting cover, a dust suction cover is fixedly connected to the bottom end of the dust suction pipe, a fixing pipe is fixedly connected to the left side of the dust suction pipe, and a dust suction fan is fixedly connected to the inner wall of the fixing pipe. According to the device disclosed by the utility model, by arranging the collecting mechanism, combustion slag generated in the singeing process can be sucked, the filter screen plate can effectively filter and intercept the combustion slag and impurities and can prevent large-particle impurities and the combustion slag from continuously flowing along with air flow, and the scraper plate can scrape off the impurities filtered on the filter screen plate, so that the impurities are prevented from blocking filter holes; and the stability and continuity of the filtering effect are ensured.

The invention belongs to the technical field of wall heat preservation, and particularly relates to a high-stability steel structure heat preservation wall which comprises crosspiece mechanisms which are symmetrically arranged, a butt joint mechanism is arranged at one end of each crosspiece mechanism, and a plurality of supporting rods are arranged between the two crosspiece mechanisms. According to the thermal insulation wall, the transverse baffles and the side baffles are convenient to mount and dismount by arranging the fixing mechanisms, the transverse baffles and the side baffles can be fixed only by aligning the semicircular blocks to the movable grooves and making the semicircular blocks slowly and completely make contact with the movable grooves, and then the limiting effect between the limiting rods and the semicircular blocks can be relieved by pushing the push rods; due to the design of the fixing mechanism, the installation process is visual and simple, constructors do not need to have high professional skills or rich experience, meanwhile, in the batch installation process, the constructors can complete connection of the transverse baffles and the side baffles more efficiently, time waste and manpower consumption caused by the complex installation process are reduced, and the installation efficiency is improved. The overall construction efficiency is improved, and the construction cost is reduced.

The utility model relates to the technical field of air coolers, and discloses an ultralow-temperature air cooler capable of reducing warehouse temperature fluctuation, which comprises an air cooling inner unit, three groups of circular holes are respectively arranged on two side surfaces of the air cooling inner unit, and a plurality of groups of inserting blocks are slidably connected with the inner wall of the air cooling inner unit positioned in the three groups of circular holes. Baffles are arranged on the sides, away from the inner wall of the cold air inner unit, of the multiple sets of inserting blocks in a sliding and penetrating mode, the baffles can be driven to rotate under cooperation of the inserting blocks through flowing of air, then air flow is conveyed, and when the cold air inner unit defrosts, due to the fact that air flow stops, the baffles can reset under the self weight, and then flowing of the air flow is stopped. And when a worker presses a pressing plate, an abutting block can conveniently abut against an inserting block under the cooperation of a telescopic rod, then the inserting block can push a first spring, the inserting block enters the baffle, the baffle can be conveniently disassembled, the baffle can be conveniently maintained and cleaned, and the quality of airflow is guaranteed during airflow conveying.

The utility model belongs to the technical field of household appliances, concretely relates to a water leakage prevention power-off and water stop device, including the waterway passageway of setting in the pipeline, the pipeline still is equipped with control passageway, the inside of control passageway is equipped with the sealing element of being able to slide;Sealing element connects the electromagnetic valve body of driving its movement, and the electromagnetic valve body includes valve body, and the inside of valve body is equipped with electromagnetic device, and the inside of valve body still is equipped with the transmission rod of being used with electromagnetic device, and transmission rod connects sealing element, and the spring of making transmission rod reset is equipped between electromagnetic device and transmission rod.

The utility model relates to a chip structure capable of improving ACF conductive particle capture rate, which belongs to the technical field of chips and comprises a chip electrode and various types of protrusions arranged on the surface of the chip electrode, a plurality of conductive particles are captured on the chip electrode, the height of each protrusion is H, 50 nm < = H < = 2 / 3 d, d is the diameter of each conductive particle, and the diameter of each conductive particle is larger than or equal to 50 nm. Different protrusions are designed on the chip electrode, the effect of preventing the conductive particles from flowing is achieved, the capture rate of the chip electrode on the ACF conductive particles is increased, the number of particles captured on the surface of the chip electrode is increased on the premise that the density of the ACF conductive particles is not increased, and the risk of short circuit can be reduced while the conduction performance is improved.

The utility model discloses a butt-welding terminal structure for an integral brushless motor. The butt-welding terminal structure for the integral brushless motor comprises a long butt-welding terminal structure and a short butt-welding terminal structure. According to the utility model, the long and short butt-welding terminals are matched with different winding and wire passing modes, and the hook structures of the butt-welding terminals are welded with the U-shaped bonding pads of the PCB in an embedded manner, so that the triangular parallel series connection and star parallel series connection modes of all the three-phase six-slot stator windings are realized, and the output of the motor is realized by using the tail ends of the long butt-welding terminals. Then, in consideration of the short creepage distance between the conductive part and the metal casing and the iron cover, the plastic sheath is specially designed to ensure the insulation performance. The four waist-shaped and circular vent holes on the PCB, the plastic sheath and the iron cover are matched with the groove shape of the stator lamination, so that the smoothness of the air channel in the motor is ensured.

The utility model discloses a secondary aluminum waste gas dusting machine with a filtering function, which comprises a filter box, a gas outlet of the filter box extends into a fan, a net cage is mounted in the filter box and positioned above air filter cotton, a filter screen is mounted in the filter box and positioned above a baffle a, and a baffle b is mounted in the filter box and positioned above the baffle b. The baffle a is located above the baffle b, the baffle b is located above the baffle c, a guide frame is installed in the filter box, the filter box is rotationally connected with a feeding shaft, gradient sound-absorbing cotton is bonded to the outer side of the filter box, the gradient sound-absorbing cotton is located on the inner side of the honeycomb core plate, and the surface of the honeycomb core plate is coated with a sound insulation layer. A baffle, a filter screen, air filter cotton and the like in the filter box are matched to filter waste gas, and the filtering effect is good; the gradient sound absorption cotton, the honeycomb core plate and the sound insulation layer on the outer side of the filter box are matched to achieve a good noise reduction effect.

The invention discloses a horizontal bullet tank ring-wrapped sand filling stabilization process. On the basis of the original technology, the dynamic load of the sand bed when the equipment is in place is improved by changing the sand bed type, redesigning the sand bed stability structure, setting a crushed stone drainage layer, adding a concrete top cover and other measures, effectively ensuring the bearing capacity of the sand bed, enhancing stability, preventing lateral stress, preventing the tank body from deflecting, ensuring the quality of the sand bed, reducing the construction workload in terms of economic benefits, effectively extending the service life of the bullet tank, reducing costs, meeting the requirements of short construction period, high efficiency and fast speed, and providing a new construction method for stabilizing large horizontal containers.

The present invention provides a production system of nano-microporous composite materials, comprising a closed room, a fluidizing device, a powder recovery device, a powder tank, a powder injection device with a hollow needle and a conveying mechanism of a fiber felt, wherein the conveying mechanism passes through the closed room, the powder injection device is arranged in the closed room, the fluidizing device is provided with an air inlet and a powder inlet, the fluid outlet of the fluidizing device is connected to a conveying pipeline, the conveying pipeline penetrates the closed room from the outside and is connected to the feed port of the powder injection device, and the exhaust port of the closed room is connected to the powder recovery device through a pipeline. The production system has a small investment in product equipment and does not use solvents and supercritical processes.

The present invention relates to the field of radar technology, and discloses a millimeter wave radar assembly, including a radar body, a back cover is installed on the back side of the radar body, a gas nozzle is fixedly connected to the lower end of the back cover, the gas nozzle is connected to the inside of the radar body, a connecting block is fixedly connected to the upper end of the back cover, the end of the connecting block away from the back cover is rotatably connected to a rotating ring, the end of the rotating ring away from the back cover is installed with a fixed ring, and an elastic sheet is fixedly connected to the middle position of the fixed ring. In this millimeter wave radar assembly, the position of the back cover is sealed by an elastic sheet. When the volume of air in the radar body expands or contracts due to heating or cooling, the elastic sheet protrudes in the direction away from the radar body or is recessed in the direction of the radar body, thereby balancing the air pressure between the radar body and the outside. Since there is no microporous structure on the elastic sheet, it is more difficult for gas and water to penetrate into the radar body, and the performance of the radar body is not easily affected.

The utility model discloses a miniature electric liquid separator and a reagent bottle thereof. The miniature electric liquid separator comprises a shell, a lower cavity, a middle cavity and an upper cavity which are sequentially formed in the shell from bottom to top, and an interaction assembly arranged at the top of the shell, a micro peristaltic pump is fixed on the inner side of the lower cavity; a storage battery and a wireless charging coil are fixed on the inner side of the middle cavity; a PCB (Printed Circuit Board) control board for receiving and transmitting a control instruction to the interaction assembly and controlling the micro peristaltic pump to accurately transfer liquid is fixed on the inner side of the upper cavity; the miniature peristaltic pump, the storage battery and the PCB control board are sequentially arranged in the lower cavity, the middle cavity and the upper cavity of the shell, so that the electric liquid separator is simple in structure, convenient to transfer liquid, high in accuracy and low in manufacturing cost, and pollution caused by misoperation is prevented. And the urgent demand of scientific research personnel on the pipetting tool can be well met.

The utility model provides a water softener and a control valve group used for the water softener, the control valve group used for the water softener comprises a driving element, a main control valve and a regeneration control valve, the main control valve comprises a main valve body and a main valve core, and the regeneration control valve comprises a regeneration control valve. Wherein the main valve body forms a valve cavity, a first opening, a second opening, a water outlet, a water inlet and a pollution discharge opening, the regeneration valve body of the regeneration control valve forms a regeneration valve cavity, a first jet flow opening and a second jet flow opening, and the main valve element is arranged in the valve cavity. A regeneration valve core of the regeneration control valve is arranged in the regeneration valve cavity, the regeneration valve cavity of the regeneration valve body is communicated with the valve cavity of the main valve body, the water inlet of the main valve body is suitable for being communicated with a raw water source, and the main control valve and the regeneration control valve are both plane valves.

The present invention relates to the field of dies, and specifically to a forging die and die design method for metal forgings, wherein the shape of the metal forging is a hollow cone, including a flange and a conical surface located on the flange, and a through hole is arranged on the conical surface; the forging die includes a relatively arranged concave die and a convex die, and a forging protrusion is arranged on the concave die and / or the convex die, and the height of the forging protrusion is 13-17 mm, and the aperture of the through hole is smaller than the diameter of the forging protrusion. The present invention can effectively control the average deformation amount, underpressure value and thickness of the forging surface of the forging to reach the ideal value range, and the forging protrusion squeezes the material during the forming process, so that the flange material of the forging flows in more and the forming is more complete, thereby ensuring that the forging is formed in place while saving materials.

The invention provides a liquid cooling plate for welding. The liquid cooling plate for welding comprises a first substrate and a second substrate, the bonding pad is arranged on the upper surface of the first substrate, and the bonding pad can be connected with a chip through a welding material; a nickel layer, wherein the nickel layer covers the bonding pad; the solder resist ink layer is arranged on the upper surface of the first substrate and surrounds the edge of the bonding pad, and the wettability of the solder resist ink layer and the welding material is lower than the wettability of the nickel layer and the welding material; and the plurality of pin fins are arranged on the lower surface of the first substrate at intervals. According to the liquid cooling plate for welding, welding materials can be prevented from flowing out of the bonding pad, and thermal resistance is reduced.

The utility model discloses a kind of airtight protective devices for radiation-proof door and window, including window frame;The inside wall of window frame is equipped with frame on one side, the inside of frame is equipped with anti-radiation glass window by hinge structure, the outer ring of anti-radiation glass window is equipped with sealing rubber strip, the inside of sealing rubber strip is equipped with metal shielding sealing sheet;The utility model is used by sealing rubber strip, metal shielding sealing sheet, first magnetic sealing strip and second magnetic sealing strip cooperation, by sealing rubber strip, the contact surface of anti-radiation glass window and frame can be closely adhered, the gap between glass and frame is filled initially, air flow and small particulate matter are prevented from entering, reduce the risk of radiation leakage through gap, by metal shielding sealing sheet, secondary shielding can be carried out to radiation, by first magnetic sealing strip and the second magnetic sealing strip on frame mutually cooperate magnetic force adsorption, metal shielding sealing sheet closely adheres frame, and sealing effect can be further enhanced.

The invention relates to an airtight ceramic-based composite material and a preparation method thereof. The method comprises the following steps: preparing an interface layer on the fiber surface of a carbon fiber preform through a CVD method; preparing a modified resin solution from carbide ceramic powder, furfuryl ketone resin and an organic solvent, and then reacting the modified resin solution with the obtained carbon fiber preform with the interface layer through a PIP process to obtain a modified C / C composite material; carrying out infiltration reaction on the modified C / C composite material and silicon powder to obtain an infiltration reaction composite material; and enabling the ceramic precursor solution to react with the infiltration reaction composite material through a PIP process to prepare the airtight ceramic-based composite material. The ceramic-based composite material with better gas tightness is prepared, the method is simple in technological process, short in period and low in cost, and the prepared material has wide application prospects and particularly has important pioneer positive significance in coping with extremely harsh use environments involved in the aerospace field.

This utility model relates to the field of gate valve technology and proposes a gate valve opening and closing actuator, including a guide tube. A hollow plate is fixed to the outer wall of the guide tube, and the hollow plate communicates with the inner side of the guide tube. A rotating hole is provided in the middle of the top surface of the hollow plate, and the rotating hole communicates with the inner side of the hollow plate. A threaded cylinder is movably inserted into the inner side of the rotating hole. A first toothed ring is fixedly sleeved on the upper outer wall of the threaded cylinder. A threaded post is threadedly connected to the inner side of the threaded cylinder, and a gate plate is fixed at the lower end of the threaded post. The gate plate is located inside the guide tube, and a fixing plate is fixed to the upper outer wall of the hollow plate. When the gear of this utility model meshes with the first toothed ring, the gate plate is opened and closed by a motor drive. When the second toothed ring meshes with the first toothed ring, the gate plate is opened and closed by manually rotating the second toothed ring. By moving the movable plate, the two opening and closing methods can be switched to cope with motor failure or power failure, thereby improving adaptability.

An anti-locking system for a rock pipe jacking machine, the pipe jacking machine includes a tool pipe with a drill bit and a matching pipe connected to the tool pipe, the anti-locking system includes a slag plate provided on the tool pipe; the slag plate can prevent mud and / or stones from flowing along the outer wall of the tool pipe; a slag cleaning method for a rock pipe jacking machine includes tool pipe drill bit torque collection and slag cleaning with a slag plate; tool pipe drill bit torque collection, the tool pipe drives the drill bit to rotate, the torque collector collects the torque driving the drill bit in real time, when the torque drops by more than 2%, the pressurizing component is started to pressurize the nozzle or flushing pipe; slag cleaning with a slag plate, the nozzle or flushing pipe sprays water to the slag plate to make the mud and / or stones gathered outside the slag plate leave the slag plate. The advantage of the present invention is that it is particularly suitable for the construction of pipelines with a hole diameter of 80 cm to 200 cm, and can prevent mud from flowing along the tool pipe and locking the tool pipe.

The utility model provides an air compressor controller installation structure which solves the problem that an existing air compressor is tedious in appearance. According to the air compressor controller installation structure, a controller comprises a panel and a circuit board, an air compressor comprises a machine shell, the machine shell comprises a main body and two air cylinder covers fixed to the top of the main body, the two air cylinder covers are arranged side by side, a motor cavity is formed in the main body, a rotor shaft is horizontally arranged in the motor cavity, and axial flow fan blades are fixed to the two ends of the rotor shaft; the mounting structure comprises a mounting cavity defined by the main body and two air cylinder covers, the mounting cavity is located above the motor cavity and communicates with the motor cavity, the top of the mounting cavity is open, and the panel is horizontally fixed to the opening; a centrifugal fan blade opposite to the mounting cavity is fixed in the middle of the rotor shaft; the circuit board is fixed in the installation cavity through a support, and the machine shell is provided with an exhaust channel for exhausting gas led into the installation cavity through the centrifugal fan blades out of the machine shell. According to the utility model, the appearance of the air compressor becomes simple.

This utility model belongs to the field of medical device technology and discloses an arteriovenous fistula (AVF) self-dilation and rehabilitation exercise device, including a first strip-shaped airbag and a fist-clenching assembly. The first strip-shaped airbag has a deflation valve fixedly mounted on it and is connected to an inflation pump. One end of the first strip-shaped airbag has a locking buckle, and the other end has a strip-shaped locking piece. The locking buckle includes a fixing seat and a positioning sub-component. The locking piece has a positioning mother-component fixed on it. The fixing seat has an inlet and an outlet communicating with the internal cavity. The strip-shaped locking piece passes through the inlet of the fixing seat into the internal cavity and exits through the outlet. The exiting strip-shaped locking piece is fixed to the positioning sub-component by the positioning mother-component. The fist-clenching assembly includes an arm fixing seat and a finger sleeve for attaching to the fingers. One side of the finger sleeve is connected to a reciprocating drive structure via a pull cord, and the other side is connected to the arm fixing seat via an elastic element. This utility model is easy to operate, allowing patients to operate independently, achieving preoperative vascular dilation and postoperative rehabilitation exercises, effectively reducing postoperative complications, and has low operating costs.

The invention relates to the technical field of lymphoma detection, and provides a cerebrospinal fluid sampling device for lymphoma detection, which comprises a puncture needle head and further comprises a working box, a rotating disc is arranged in the working box, three groups of adjusting mechanisms are arranged on a fixed plate, each adjusting mechanism comprises a special-shaped clamping block, three first sliding grooves are formed in the fixed plate, and first sliding blocks are arranged in the first sliding grooves. A screw rod is connected to the output end of the first motor; an adjusting block is arranged on the screw rod; three connecting plates are arranged on the adjusting block; a through hole is formed in the cover cap, a connecting hose is arranged in the through hole, the top end of the connecting hose is connected with the puncture needle head, and a sleeve is fixedly connected to the top end of the cover cap; a top block is arranged in the sleeve, a first electric push rod is arranged on the sleeve, a second motor is mounted on the working box, and the output end of the second motor is connected with a gear, the test tube is automatically clamped and fixed, and the test tube is automatically replaced for sampling, so that the use convenience and practicability are improved.

The utility model provides a vehicle-mounted air compressor. Tire repair rubber is prevented from flowing towards an air compressor body through a simple structure. The vehicle-mounted air compressor comprises an air compressor body and the bottle cap assembly. The bottle cap assembly comprises a bottle cap piece and a sealing flow guide piece. The bottle cap piece is arranged on the air compressor body and provided with an air inlet and an air outlet, and the bottle cap piece is communicated with the air compressor body through the air inlet. The sealing flow guide piece is arranged on the bottle cap piece and comprises a sealing part and a flow guide part. The sealing part surrounds the flow guide part, and the flow guide part covers the air inlet and is provided with at least one air inlet hole and at least one air outlet hole. The flow guide part is communicated with the air inlet through the air inlet hole and communicated with the air outlet through the air outlet hole. Airflow from the air compressor body is suitable for sequentially passing through the air inlet, the air inlet hole, the air outlet hole and the air outlet. Therefore, according to the vehicle-mounted air compressor, the manufacturing and assembling difficulty of the bottle cap assembly can be reduced.

The invention discloses a piercing plug structure which comprises a plug body, a plurality of hole channels are formed in the plug body, the hole channels are distributed in the outer wall of the plug body in a honeycomb shape, and filler is arranged in the hole channels so that heat conduction can be blocked or the hole walls of the hole channels can be supported through the filler; the filler at least comprises one or more of oxides, carbides, nitrides, halides, sulfides or high-temperature-resistant metals. The problems that an existing top is prone to deformation in a continuous high-temperature state, the heat insulation effect is poor, and the service life is short are solved.