43results about How to "Guaranteed connection tightness" patented technology

The utility model discloses a hydraulic joint pipe fitting which comprises a pipe fitting body, a connecting flange is installed at the right end of the pipe fitting body, and a quick connecting and fixing structure is installed on the pipe fitting body. The quick connecting and fixing structure comprises a combined insertion pipe, an embedded rotary sleeve, a combined internal thread and a fixing and locking assembly. The hydraulic joint pipe fitting relates to the technical field of automobile parts, and has the beneficial effects that the problems that when the hydraulic joint pipe fitting of the existing automobile hydraulic system is used, the oil leakage phenomenon occurs along with the increase of the service time because the oil pressure is relatively large during internal flowing and the temperature of hydraulic oil is relatively high, and the service life of the hydraulic joint pipe fitting is influenced are solved; and existing pipe fittings are connected and fixed through tension bands, the connecting effect is poor, although fixing is convenient, leakage is prone to occurring, and the safety of a hydraulic system is affected.

The invention provides a liquid cooling system and a battery pack, the liquid cooling system at least comprises a liquid cooling assembly, the liquid cooling assembly is used for carrying out liquid cooling on a battery cell group, the liquid cooling assembly comprises a liquid cooling plate and a plastic current collecting piece, the liquid cooling plate is arranged on the side surface of the battery cell group, the liquid cooling plate is hollow, and a liquid cooling flow channel is formed in the liquid cooling plate; a liquid inlet communicated with one end of the liquid cooling flow channel and a liquid outlet communicated with the other end of the liquid cooling flow channel are formed in the liquid cooling plate; the plastic flow collecting piece is formed on the liquid cooling plate in an injection molding mode, the plastic flow collecting piece and the liquid cooling plate are integrally arranged, the plastic flow collecting piece comprises a liquid inlet flow channel and a liquid outlet flow channel, the liquid inlet flow channel is used for communicating a liquid inlet and a liquid inlet pipeline of the liquid cooling plate, and the liquid outlet flow channel is used for communicating a liquid outlet and a liquid outlet pipeline of the liquid cooling plate.

The present application relates to the technical field of electric control switch, in particular to a kind of motorcycle disc brake control switch, including shell, two wiring copper sheets, electricity connection copper sheet, slider and cover plate, installation cavity is provided in the shell, installation groove is opened in the symmetrical two inner side walls of installation cavity, and two The wiring copper sheet is fixedly inserted in installation groove;The present application is closed by the setting of cover plate and sleeve, the part of wiring copper sheet in installation cavity is isolated with external environment with electricity connection copper sheet, and the inside of the position of wiring copper sheet through shell can be sealed with sealing glue, simultaneously still can be filled into inert gas in installation cavity, to avoid the water vapor in environment into installation cavity, cause the part of wiring copper sheet in installation cavity and electricity connection copper sheet corrosion Problem, guarantee the conductive property of wiring copper sheet and electricity connection copper sheet, guarantee the stability and waterproof performance of motorcycle disc brake control switch.

The utility model provides a kind of quick connection buckle type fire hose connector, it is related to fire hose technical field, including lock block, the outside of lock block is connected with lock shell, the end of lock block is connected with spring, the upside of lock block is connected with unlocking plate, by the fixed buckle outside daughter connector with the entrance end of the card slot inside female connector, first daughter connector is inserted into female connector, in clockwise rotating daughter connector, make fixed buckle move along the L type groove of card slot, when fixed buckle moves, by extruding the wedge surface of lock block, so that lock block is contracted by spring, when fixed buckle continues to move to the end of card slot, fixed buckle no longer extrudes lock block, lock block is re-extended under the action of spring, while the protrusion of lock shell both sides is positioned to lock block, rectangular surface of lock block is contacted with fixed buckle, fixed buckle is clamped in the end of card slot, ensure that daughter connector cannot rotate, to ensure that daughter connector is connected stably with female connector.

The application relates to the aluminum alloy door and window processing technical field, in particular to a glue injection device for aluminum alloy door and window frame processing, which comprises a frame positioning unit and a controller, a transmission mechanism is arranged in the frame positioning unit, the transmission mechanism comprises a transmission seat, moving frames are arranged at the left and right ends of the transmission seat, a transmission assembly for realizing the mutual approaching or moving away of the two moving frames is arranged in the transmission seat, longitudinal plates are arranged at the upper ends of the moving frames, glue injection mechanisms which are aligned with glue injection holes at the front and back ends of the frame are arranged at the front and back ends of each longitudinal plate; glue injection amount sensing assemblies are arranged at the front and back ends of the longitudinal plates; the glue injection device disclosed by the application realizes automatic glue injection of the aluminum alloy frame, reduces the labor intensity, improves the glue injection efficiency, and during the whole glue injection process, the frame profile connecting part is fully injected with glue, the connecting stability and the sealing performance of the whole frame are ensured, glue injection overmuch waste can be avoided, and the glue injection effect on the aluminum alloy door and window frame is excellent.

The breathing machine comprises a main machine and a humidifying tank, the main machine is provided with an inserting base, the humidifying tank is provided with an inserting section, the inserting section can be in inserting fit with the inserting base in the first direction and can be separated from the inserting base in the second direction opposite to the first direction, and the inserting section is provided with an air outlet adapter pipe; the bayonet socket is provided with a receding groove extending in the first direction, so that when the humidifying tank is matched with the main machine in an inserted mode, the air outlet adapter pipe can enter the receding groove in the first direction. In the process of assembling and disassembling the humidifying tank, the protruding air outlet adapter tube does not need to be disassembled, and the humidifying tank inserted with the air outlet adapter tube can be integrally inserted into the bayonet socket, so that the assembling and disassembling steps of the humidifying tank are simplified, and the disassembling step of the air outlet adapter tube in the process of assembling and disassembling the humidifying tank is omitted. In addition, the risk that internal water leaks from the air outlet due to shaking of the humidifying tank is avoided, the cleaning burden of a user is reduced, and the use experience is improved.

The utility model discloses a heating and ventilation pipe assembly structure for heating and ventilation engineering, which comprises assembly sections, and each assembly section comprises a sleeve fixing frame. The fixing frame comprises a connector and a hanging frame, and sleeving parts are arranged on the two sides of the connector; the inner diameter of the sleeve is larger than the outer diameter of a heating and ventilation pipe to be assembled, a plurality of protruding ribs protruding towards the inner side are formed on the inner pipe wall of the sleeve, and the protruding ribs are evenly arranged on the annular face of the inner pipe wall of the sleeve. A heat preservation material layer is further formed on the inner pipe wall of the sleeve to serve as an inner pipe face lining material; the heating and ventilation pipe to be assembled is concentrically assembled in the sleeve, and in the assembling state, the protruding ribs abut against the outer pipe wall of the heating and ventilation pipe to be assembled. A gap is reserved between the surface of the heat preservation material layer and the outer pipe wall of the heating and ventilation pipe to be assembled, and the gap is filled with foaming heat preservation glue. The heating and ventilation pipeline has the advantages of being convenient to install, good in heat preservation effect, high in attractiveness and the like, and solves the problems that a traditional heating and ventilation pipeline is poor in heat preservation performance and unreasonable in installation and fixing mode.

The utility model discloses a composite insulator which comprises an insulating tube, umbrella skirts located on the periphery of the insulating tube and two flanges arranged at the two ends of the insulating tube respectively, the insulating tube is a hollow circular tube, supporting pieces are arranged in the two ends of the insulating tube, and each supporting piece is of a solid cylinder structure. The supporting piece and the insulating tube are coaxially arranged, the supporting piece extends inwards from the end of the insulating tube, the outer diameter of the supporting piece is matched with the inner diameter of the insulating tube, the flange is connected to the outer side of the end of the insulating tube in a pressing mode, and the insulating tube, the supporting piece and the flange are tightly connected. According to the composite insulator, compression joint of the hollow insulation tube and the flange is achieved through the supporting piece, the connection strength and the sealing performance between the hollow insulation tube and the flange are guaranteed, the composite insulator is effectively prevented from losing efficacy at the joint of the flange and the insulation tube, the structural strength of the composite insulator can be brought into full play, and compared with a traditional glue joint technology, the composite insulator is more stable. A long-time glue solution curing procedure is omitted, and the production efficiency is improved.

This invention discloses a venting detection device for an ultra-high pressure fuel distribution pipe, relating to the field of water immersion leak detection technology. It includes a detection water reservoir with two air supply connectors mounted on it. A sealing component is fixedly installed on the right-side air supply connector. Two automatic cutting components are mounted on the detection water reservoir, used to cut off the clamping ends of the fuel distribution pipe. An air intake control component is fixedly installed on the left-side air supply connector. An anti-bending and anti-winding component is installed inside the detection water reservoir. The automatic cutting components allow for automatic removal of the clamping sections at both ends of the fuel distribution pipe after leak detection. This removal can be performed during normal venting and leak detection operations, avoiding the risk of manual forgetting to remove the clamping sections. This solves the problem that current ultra-high pressure fuel distribution pipe venting detection devices are not convenient for automatically removing the clamping sections after venting detection.

The utility model relates to an automobile trunk lid which comprises a trunk lid outer plate. The trunk lid inner plate is fixed on the inner side of the trunk lid outer plate; the hinge reinforcing plates are arranged on the two sides of the trunk lid inner plate; the lock catch reinforcing plate is arranged at the bottom of the trunk lid inner plate; the structural adhesive is arranged between the trunk lid outer plate and the trunk lid inner plate and used for connecting the trunk lid outer plate and the trunk lid inner plate; the glue blocking ribs are arranged on the two sides of the structural glue. Compared with the prior art, the utility model has the advantages of effectively controlling the thickness of the structural adhesive, ensuring the connection strength and the sealing property of the product and the like.

This invention discloses a millable composite casing sub for side-drilling window opening, its preparation method, and its application. The millable composite casing sub comprises the following components: a matrix, a lubricating phase, and brittle phase reinforcing particles; the matrix is ​​an aluminum alloy matrix; the lubricating phase is graphite particles; and the brittle phase reinforcing particles are brittle mineral particles. During side-drilling window opening operations, an integrated hydraulic directional device is seated inside the lower steel casing below the casing sub. A gyroscope is used for precise orientation, and then a milling cone is lowered to perform side-drilling window opening. The sub body is milled using the milling cone to form the initial window. This invention, while ensuring the overall connection strength and sealing of the wellbore, locally alters the millability of the casing material at the planned window opening point. Through material and structural innovation, it replaces traditional steel casing, shortens the operation cycle, reduces the difficulty of milling operations, and extends the service life of the milling cone, thereby achieving high efficiency, low cost, and safety and reliability in window opening operations.

The utility model relates to the field of equipment for microbial fermentation, concretely to a feeding device for microbial fermentation tank, including the fermentation tank body, the fermentation tank body top is fixedly arranged with the feed inlet, the feed inlet inboard is movably arranged with the feeder, the feeder top is fixedly arranged with the feeding pipe, the feeding pipe one end fermentation tank body one side is fixedly arranged with the feeding tank, the feeding tank outside is fixedly arranged with the inside view window, the feeding tank top is fixedly arranged with the stirring motor, the stirring motor below fermentation tank body inboard is fixedly arranged with the stirring frame, this kind of device extracts from the feeding tank through the feed pump, then utilizes the feeding pipe and the feeder to convey to the fermentation tank body, and the feeding tank is provided with the stirring motor, can drive the stirring frame rotation through two synchronous gear, thereby utilizes the stirring frame to agitate the nutrient mixed solution in the feeding tank, mixes all kinds of nutrient solution evenly, thereby guarantee that the nutrient mixed solution can better provide the nutrition for the microorganism.

This utility model relates to the field of battery cluster technology and discloses a battery cluster liquid-cooled pipe connection sealing device, including a liquid-cooled pipe body. A rotating collar and an outer collar are respectively sleeved at both ends of the liquid-cooled pipe body. A threaded post is fixedly installed at one end of the rotating collar, and an internal threaded groove is formed on the inner side of the outer collar. A sealing element is filled on the inner side of the outer collar, and an inwardly inclined surface is formed on the inner side of the sealing element. An elastic element located on the surface of the threaded post is fixedly adhered to one end of the rotating collar. This structural design has dual advantages: firstly, modular components enable low-cost and rapid assembly, and sealing can be completed simply by rotating the rotating collar during operation; secondly, the sealing element can be flexibly disassembled. When the sealing performance deteriorates due to repeated compression deformation, it can be directly disassembled and replaced without disassembling the entire pipeline system, effectively restoring the initial sealing effect and balancing economy and maintenance convenience.

The utility model discloses a silica gel outer cover water stop, it includes water stop body and one or above's extension section, between water stop body with extension section, between extension section with extension section is equipped with detachable connecting structure and sealing connecting structure, water stop body includes first hardware spare and first silica gel outer ring, extension section all includes second hardware spare and second silica gel outer ring, first silica gel outer ring and second silica gel outer ring all are equipped with outer ring anti -infiltration water structure. The utility model discloses a detachable connecting structure that is formed by the card groove structure and the clamping block structure can constitute the water stop of different length, friction requirement according to demand, improve the applicability, reduce the customization cost, and through setting up sealing connecting structure is used for guaranteeing the connecting sealing property between water stop body with extension section, extension section and extension section, guarantees the subsequent use of silica gel outer cover water stop.

The utility model discloses a damping unit type glass curtain wall which comprises a frame and tempered glass arranged in the frame, the frame is divided into an outer frame and an inner frame, four sets of butt joint inserting plates are evenly installed on the inner side of the outer frame, four sets of fixing bolts are inserted into the corners of the outer frame in a penetrating mode, and four sets of butt joint inserting openings used in cooperation with the butt joint inserting plates are evenly formed in the inner side of the inner frame. Threaded holes are formed in the corners of the inner frame, the fixing bolts are inserted into the threaded holes in a threaded mode, buffering pads are installed on the inner walls of the outer frame and the inner frame, the tempered glass plate is located between the outer frame and the inner frame, the edge of the tempered glass plate makes contact with the buffering pads, buffering assemblies are further arranged on the inner sides of the outer frame and the inner frame, and each buffering assembly comprises a connecting piece, a traction steel wire and a buffering protruding block. The four sets of connecting pieces are evenly fixed to the corners of the buffering cushion, and the traction steel wires are connected with the two sets of connecting pieces at the opposite angles. According to the unit type glass curtain wall, the damping effect of the glass can be effectively improved, and the safety of the glass curtain wall in the using process is improved.

The utility model discloses the vault forming die of down draught kiln, including two gaps setting down draught kiln side wall still includes forming die lower mould and forming die upper mould, the top of forming die lower mould is fixedly provided with the forming part of arch, and the top surface of forming part is cambered surface, forming die upper mould includes the forming cover plate of arch, and the forming cover plate sets up at the top of down draught kiln side wall and is detachably connected with down draught kiln side wall, and the top of forming cover plate is equipped with the open -and -close feeding opening, the front and rear end of forming cover plate all are fixedly connected with the sealing plate of being inverted in the bottom of forming part, and the forming cover plate and forming part cooperate and form the closed cavity, the utility model discloses can effectively reduce the construction difficulty of down draught kiln vault structure, improve the construction efficiency of vault structure, and the casted refractory material slurry can directly solidify in the top of side wall to guarantee the connecting strength and sealing property between vault and side wall, the forming die in the utility model discloses can be repeatedly used, can effectively reduce the construction cost of down draught kiln.

The application discloses an underwater cable armored connection process applied to the field of underwater cables, which is characterized by using a pair of armored connection devices to connect and fix the disconnected armored layers by the armored connection devices, thereby enhancing the structural strength of the armored layer connection part, effectively reducing the experience requirement for the operator, shortening the overall connection operation time, and preventing the outer diameter of the connection part from being excessively thickened after connection, so that the original cable outer diameter can be maintained, no excessive protrusion is formed, the probability of hooking with underwater objects in the subsequent use process is reduced, and the risk of connection part damage is reduced; grouting filling can integrate the armored connection device and the internal cable into a whole, thereby further improving the integrity and structural stability of the connection structure, and cooperating with a small amount of outer layer wound self-adhesive sealing tape to realize effective outer sheath sealing structure, without additional thickening and reinforcement, while ensuring the connection strength and sealing property, the use requirement of the underwater cable is met.

The invention relates to the technical field of manufacturing of carbon fiber composite material structural parts, and provides a light carbon fiber cabinet structure and an assembling method, the light carbon fiber cabinet structure comprises a top plate, a bottom plate, a left side plate, a right side plate, a front side plate, a reinforcing frame and an electric cabinet support which are all made of carbon fiber composite materials; the front, the rear, the left and the right of the top plate are respectively connected with the top ends of the front side plate, the reinforcing frame, the left side plate and the right side plate, the front, the rear, the left and the right of the bottom plate are respectively connected with the bottom ends of the front side plate, the reinforcing frame, the left side plate and the right side plate, and the electric cabinet support is arranged at the left upper corner in the frame type structure. According to the lightweight carbon fiber cabinet, the lightweight and universal requirements of the airborne cabinet are met, meanwhile, the requirements for strength and rigidity are met, rapid assembly and batch production can be achieved, the functionality of the lightweight carbon fiber cabinet for storing and installing airborne equipment is successfully achieved, and the uniformity of the structural integrity of the whole machine is guaranteed.

The utility model relates to a built-in over-temperature and over-current protector, which comprises a bimetallic element and a static contact, and is characterized in that the bimetallic element is matched with the static contact to form connection and disconnection when acting; the static contact and one end of the bimetallic element are fixedly connected to the bottom plate; the heating element is connected to the static contact in a conducting manner; the shell is fixedly connected with the bottom plate, and insulation paper is arranged between the shell and the bottom plate; and the sealing injection molding rubber is packaged between the bottom plate and the insulation paper. In the structure of the utility model, due to the arrangement of the sealing injection molding part, the connection sealing performance between the bottom plate and the shell is ensured, and the internal heating wire ensures that heat can be quickly generated to enable the bimetallic element to act when the current is too high, so that the protection effect on the motor is fully improved; therefore, the whole matching product can be better assembled in the motor, the manufacturing process is simplified, and the production cost is reduced.

This utility model discloses a thin film deposition apparatus, which includes: a vacuum reaction chamber comprising a reaction chamber body and a chamber top cover connected to the reaction chamber body; an upper electrode assembly disposed on top of the vacuum reaction chamber; a lower electrode assembly for supporting a wafer, disposed opposite to the upper electrode assembly; an radio frequency power supply for providing radio frequency energy, connected to the upper electrode assembly and / or the lower electrode assembly; a radio frequency isolation ring disposed between the upper electrode assembly and the chamber top cover and extending below the chamber top cover, the radio frequency isolation ring having a first heater; and a cooling device connected to the chamber top cover. Its advantage is that this apparatus combines the first heater and cooling device, etc., to meet the different temperature requirements of adjacent radio frequency isolation rings and chamber top covers.

This utility model discloses a battery cover with airbag cushioning, relating to the field of battery covers. It includes a battery cover body, which comprises a mounting base frame, a frame-shaped rubber airbag, a movable battery cover, a plate-shaped rubber airbag, a dustproof corrugated pipe, mounting plates, and cushioning springs. The frame-shaped rubber airbag is fixedly installed on the inner wall of the mounting base frame. The movable battery cover is located on one side of the mounting base frame. The plate-shaped rubber airbag is fixedly installed on the inner wall of the movable battery cover. The dustproof corrugated pipe is fixedly sleeved on the mounting base frame and the movable battery cover. Eight mounting plates are symmetrically fixedly installed on the inner walls of the mounting base frame and the movable battery cover. By setting up a battery cover body composed of a mounting base frame, frame-shaped rubber airbag, movable battery cover, plate-shaped rubber airbag, dustproof corrugated pipe, mounting plates, and cushioning springs, a multi-dimensional, multi-layered cushioning and protection system can be formed, effectively solving the problem of traditional single-material battery covers lacking a cushioning and energy-absorbing structure.

The utility model relates to a self-cleaning faucet which comprises a shell, a water outlet located on the front side of the shell, a water inlet located on the rear side of the shell, a valve element located between the water inlet and the water outlet of the shell, a handle linked with the valve element and a liquid containing sleeve integrally formed with the shell. The shell comprises a water flow channel located between the water inlet and the water outlet, the liquid containing sleeve comprises a liquid containing cavity, the liquid containing cavity is communicated with the water flow channel, a cover body is detachably installed on the top of the liquid containing sleeve, and the upward projection of the liquid containing cavity falls on the cover body. A first sealing ring abutting against the inner wall of the liquid containing cavity is fixedly installed in the cover body. By the adoption of the scheme, the self-cleaning faucet is provided, the detergent / powder is contained in the liquid containing sleeve and flushed from the water flow channel to the water outlet side, and therefore the water outlet of the faucet can be cleaned in the circumferential direction.

The application discloses a quick-release furnace door device for a paint stripping kiln, and belongs to the technical field of paint stripping kiln equipment, which comprises a paint stripping kiln main body, a mounting seat is fixedly installed on the front side of the paint stripping kiln main body, and a furnace door is rotationally connected through the mounting seat; the application drives a threaded rod to rotate by rotating a rotating handle, drives an adjusting rod to lift, makes a fixing rod and a lock catch quickly insert or separate, replaces the operation of tightening traditional bolts one by one, realizes quick opening and closing of the furnace door, greatly reduces downtime of each time when workpieces are loaded and unloaded, after the furnace door is closed, an air source control device sends air into a sealing air bag through a gas conveying pipe, the sealing air bag is inflated to fill gaps between the furnace door and the paint stripping kiln main body, the connection sealing property is ensured, sealing failure caused by mechanical abrasion is avoided, meanwhile, intrusion of external air and leakage of internal paint stripping agent steam are effectively prevented, and when the furnace door needs to be opened, gas in the air source control device can be discharged through the air source control device.

The utility model discloses a closed electric cylinder, including electric cylinder body, connecting assembly and sealing assembly, the connecting assembly includes the connecting column of ball screw bottom welding, and the rectangular groove and first circular hole that are set up respectively at the bottom and both sides of connecting column, the utility model discloses a closed electric cylinder, the connecting column of ball screw bottom and the rectangular pivot of servo motor upper end, under the clamping of both sides fixed clamps, can carry out convenient fixed connection, and then to ball screw carries out the steady drive, connecting assembly is convenient for electric cylinder body internal component assembly simultaneously, also is favorable to the dismounting overhaul of electric cylinder body internal component damage, the sealing ring of clamping between electric cylinder body bottom and servo motor and the sealing cover of electric cylinder body top sleeve outer end installation, also can keep servo motor, sleeve and the connecting sealing property between electric cylinder body, and then keep the closure of electric cylinder body inside to the outside world.

The utility model relates to the field of pipe connecting structures, in particular to a solid wall pipe connecting pipe fitting. The tool comprises a sleeve, a boss part and a connecting part, the boss parts are integrally connected to the inner side of the sleeve, protrude inwards and are arranged side by side in the axial direction of the sleeve, and the inner side faces are in interference fit with the outer circumferential face of the solid wall pipe. And the sleeve is connected with the solid-wall pipe through the connecting part. The connecting pipe is in interference sealing connection with the two solid-wall pipes, the two solid-wall pipes are distributed at intervals, the influence of thermal expansion and cold contraction is eliminated, and the stability of the connecting position and the connecting sealing performance are guaranteed.

The utility model relates to the technical field of plastic shells, and discloses a waterproof assembly which comprises a shell and a shell cover, waterproof structures are arranged on the left side and the right side of the shell, output wires are arranged on the inner sides of the waterproof structures, each waterproof structure comprises a fixing sleeve, a clamping sleeve, a conical sleeve and a buckling sleeve, the fixing sleeves and the shell are fixedly installed, and the buckling sleeves and the fixing sleeves are connected through threads. And connecting rods are symmetrically arranged on the front side and the rear side of the clamping sleeve, a gear is arranged above the output wire, first racks are engaged with the two sides of the gear, a second rack is arranged between the adjacent first racks, and the first racks and the second racks are both engaged with the gear. The waterproof structure is arranged at the joint of the output wire and the shell, so that the connection sealing performance of the output wire and the shell is guaranteed, the waterproof effect of parts is improved, the anti-falling effect of the output wire is improved, a circuit can stably output electric signals, and the use stability of the parts is guaranteed.

The utility model discloses a face cream tank, which relates to the field of cosmetic packaging, and adopts the technical scheme that the face cream tank comprises a tank body and a screw cap, the top end of the tank body is fixedly connected with a threaded section matched with the screw cap, the top surface of the threaded section is provided with a plurality of slots, elastic blocks are arranged in the slots, and the top surfaces of the elastic blocks are higher than the top surface of the threaded section. The elastic block abuts against the screw cap. An upward force is applied to the screw cap through the elastic block, so that the pressure between the threaded section and the screw cap is increased, and the pre-tightening force between the threaded section and the screw cap is improved, so that the pre-tightening force between the screw cap and the threaded section does not completely depend on the extrusion between the screw cap and the tank body after the screw cap is tightened, and the connection strength and the sealing performance between the screw cap and the tank body are ensured; the tank body and the threaded section are both made of HDPE materials, so that the tank body and the threaded section have good rigidity, and the structural stability of the inserting groove and the threaded section is guaranteed.

This utility model discloses a multi-layer composite PVC-U plastic pipe fitting, including a fitting mechanism and a sealing mechanism. The fitting mechanism includes a connector, a connecting pipe connected to and communicating with the connector, and a sealing mechanism. The sealing mechanism includes multiple arc plates embedded inside the connector, an adhesive cavity located on the inner side of the arc plates, multiple pressure blocks attached to the outer side of the arc plates, and multiple adhesive outlet pipes installed on both sides of the arc plates and communicating with the interior of the adhesive cavity. The outer ends of the adhesive outlet pipes are flush with the outer wall of the connector. In this utility model, when it is confirmed that there is adhesive inside the adhesive cavity, the operator screws the connector to the outer pipe body. The inner wall of the outer pipe body is deformed by squeezing the pressure blocks, and then the volume of the adhesive cavity decreases. The adhesive inside fills the gap between the connector and the outer pipe body through the adhesive outlet pipes, thereby completing the sealing connection and improving the user comfort of this device.

The utility model discloses a water supply and drainage pipeline quick connecting device which comprises a first drainage pipeline and a second drainage pipeline, and one end of the first drainage pipeline is connected with one end of the second drainage pipeline through a connecting piece. The first connector is rotated, the first connector is in threaded connection with the first drainage pipeline, then the second connector is rotated, the second connector is in threaded connection with the second drainage pipeline, and then the first connector, the second connector and the butt joint pipe are fixed through the fixing assembly. The first drainage pipeline and the second drainage pipeline can be conveniently connected, the connection stability of the first drainage pipeline and the second drainage pipeline is improved, and the connection sealing performance of the first connector and the butt joint pipe and the connection sealing performance of the second connector and the butt joint pipe are improved through the arrangement of the sealing bearings. Threaded connection ensures the connection sealing performance of the first drainage pipeline and the first connector and the connection sealing performance of the second drainage pipeline and the second connector respectively.