159results about How to "Avoid seal failure" patented technology

This utility model discloses a multi-layer waterproof LED mini-lamp for vehicles, relating to the technical field of automotive LED mini-lamp. The multi-layer waterproof LED mini-lamp includes an LED mini-lamp body and a waterproof component including a first rain shield. A first limiting groove is formed on the surface of the LED mini-lamp body, and a second sealing gasket is installed inside the first limiting groove. Six first bolts are threaded into the internal part of the first rain shield. A second rain shield is located at the upper end of the LED mini-lamp body, and a second limiting groove is formed on the surface of the LED mini-lamp body. A third sealing gasket is installed inside the second limiting groove, and six second bolts are threaded into the internal part of the second rain shield. The first rain shield forms a first layer of liquid seal through the second sealing gasket, preventing rainwater from seeping in from the top gap. The second rain shield covers the outside of the first rain shield, and through the cooperation of the third sealing gasket and the second limiting groove, forms an outer physical barrier. Compared with the traditional single-layer structure's "one-to-all" failure mode, reliability is significantly improved.

The invention discloses a nonmetal composite hydrogen conveying hose with a multi-form hydrogen blocking layer, and belongs to the technical field of hydrogen conveying hoses, the nonmetal composite hydrogen conveying hose comprises an external pipe, the bottom end of the external pipe is connected with a butt-joint pipe, the bottom end of the butt-joint pipe is connected with a composite hose, the bottom end of the butt-joint pipe is connected with a first sleeve in a penetrating mode, and the top end of the butt-joint pipe is connected with a second sleeve in a penetrating mode; the first sleeve is sleeved on the outer wall of the composite hose, the second sleeve is sleeved on the outer wall of the external pipe, a cavity is arranged in the butt-joint pipe, and a sealing measuring assembly is slidably connected in the cavity of the butt-joint pipe. A complete hydrogen conveying structure is integrally formed by a composite hose, a butt joint pipe and an external pipe, the butt joint pipe is fixedly connected with the composite hose and the external pipe in a sleeving mode through a first sleeve and a second sleeve, an inner cavity provides an installation and sliding space for a test sealing assembly, and the composite hose is of a multi-layer composite structure of a hydrogen conveying pipe, a first hydrogen blocking layer and a second hydrogen blocking layer. And a multi-form hydrogen blocking system with double hydrogen blocking layers and a hydrogen transporting base layer is formed.

This utility model discloses a stainless steel storage tank with good sealing performance for chemical production, including a tank body. A sealing cover is provided on the top of the tank body for sealing. A driving pressing assembly is provided on the surface of the tank body. The driving pressing assembly is used to drive and press down the sealing cover, improving the sealing performance between the sealing cover and the tank body. A connecting rotating assembly is provided on the sealing cover. This utility model achieves automated pressing and releasing of the sealing cover through the driving pressing assembly, replacing the traditional one-by-one bolt tightening operation. The sealing ring at the bottom of the sealing cover, together with the annular positioning block and annular positioning groove at the top of the tank body, form a triple sealing structure. The annular positioning block is embedded in the annular positioning groove for precise positioning, preventing the sealing cover from shifting. The pressing plate applies uniform pressure through the driving pressing assembly, ensuring a tight fit between the sealing ring and the upper edge of the tank body, eliminating local gaps.

The utility model provides a kind of fire-fighting spray vertical support pipe quick alignment structure, it is related to pipeline alignment technical field, including support, multiple fixed force are provided on support along length direction, and fixed force is used for for horizontal pipe to pass through and is fixed to horizontal pipe;Infrared emitter is installed in one side of support, for emitting bar light, bar light forms optical path along vertical direction and is irradiated to tee, when rotating tee makes the casting line of its outer wall and vertical optical path coincide, then the side mouth of tee is in vertical state;Fixed force and infrared emitter are all installed on adjusting assembly, adjusting assembly can adjust the height of fixed force and infrared emitter and is fixed after adjustment.The utility model can be in ground assembly stage to tee and be aligned and fixed in unified direction, to ensure vertical support pipe installation consistency, avoid leakage risk caused by secondary tightening, and effectively improve overall installation efficiency.

The present application relates to the field of plunger pump, disclose a kind of slurry separation structure and plunger slurry pump, including pump body, flow guide pipe is equipped in pump body, the middle part of flow guide pipe is equipped with the isolation ring that follows plunger movement and moves up and down with action.Pumper upper part side end is equipped with plunger channel with medium oscillation cavity communication, plunger channel is connected with packing box, packing box is equipped with plunger, which can reciprocate transversely in plunger channel, flow guide pipe is located outside the lateral of plunger activity range.The present application can separate slurry medium, and effectively avoid the full turbulence of backwash medium and slurry medium, and plunger can be removed from the front end of pump body for maintenance, due to the existence of turbulence isolation ring, effectively shorten the size of pump body, improve the reliability of pump, maintainability, reduce manufacturing cost and improve the service life of spare parts.

This invention discloses an oil-water-gas well reservoir expansion and sealing jet fluid production and sand removal device, relating to the field of oil production technology. The device includes a central tube and further comprises: an expansion assembly located around the central tube, with its lower end positioned on the central tube and its upper end capable of sliding on the central tube, used for radial expansion under the drive of a hydrodynamic fluid; and a jet nozzle located below the central tube and below the expansion assembly, used to spray hydrodynamic fluid, creating a negative pressure zone in the spray area to absorb formation fluid. This integrated design combines the expansion assembly and the jet nozzle, allowing for the completion of both annular sealing and jet fluid production and sand removal functions in a single well run, avoiding the cumbersome process of two well runs required by traditional technologies and shortening the operation time.

The invention relates to the technical field of medical equipment, and provides a negative pressure transfer incubator which comprises a case, a constant temperature cover and an elastic inflation tube, the case is of a box body structure with an opening in the upper end, a continuous annular containing groove is formed in the upper end of the case, the constant temperature cover is of a cover body structure with an opening in the lower end, and the lower end of the constant temperature cover is matched with the containing groove; the lower end of the constant-temperature cover is used for being inserted into the containing groove, lock catch structures used for mutual connection are arranged on the outer wall of the constant-temperature cover and the outer wall of the machine box respectively, an air pump is arranged in the machine box and connected with an elastic inflation pipe, the elastic inflation pipe is connected into the containing groove, and when the constant-temperature cover and the machine box are in a connected state, the elastic inflation pipe is connected into the containing groove. And the elastic inflating pipe is positioned between the constant-temperature cover and the case. Through the multiple synergistic effects of guiding positioning, mechanical locking and active inflation sealing, the sealing reliability and adaptability of the main connecting face of the negative pressure transfer incubator are remarkably improved, and the stability of the internal negative pressure environment is effectively maintained.

The invention discloses a vacuum extrusion device for preparing titanium and titanium alloy, relates to the technical field of titanium and titanium alloy preparation, and aims at solving the problems that an existing device is prone to sealing failure, not thorough in cleaning and low in temperature control precision. The device comprises a vacuum chamber, an extrusion rod, an air passage system, an air source distributor, a temperature monitoring module and an external control module. The working section of the extrusion rod is provided with three sections of spiral grooves, and precise coupling of dynamic sealing, self-cleaning and temperature field regulation and control is achieved through cooperation of an air channel system and multiple air channels. The first section of main sealing spiral groove forms a high-pressure air curtain, the second section of temperature control spiral groove adjusts the temperature in a self-adaptive mode through a shape memory alloy ring, and the third section of cleaning spiral groove conducts deep cleaning through the reverse suction effect. And the external control module adaptively regulates and controls each gas path according to temperature and impurity concentration monitoring data, so that the structure is simplified, the efficiency is improved, the product quality stability is guaranteed, and the batch production requirements of high-quality titanium and titanium alloy are met.

The utility model discloses a heat distribution pipeline connecting structure which comprises a first pipe body and a second pipe body, spherical connecting pieces are coaxially and symmetrically arranged at the end of the first pipe body and the end of the second pipe body, and the outer surface of each spherical connecting piece is of a spherical crown-shaped structure. A short pipe is arranged between the first pipe body and the second pipe body, spherical connecting grooves matched with the spherical connecting pieces are formed in the two ends of the short pipe, the inner surfaces of the spherical connecting grooves are spherical surfaces with the curvature radius consistent with the curvature radius of the outer surfaces of the spherical connecting pieces, and the spherical connecting pieces are embedded into the spherical connecting grooves to form a multi-degree-of-freedom rotation pair. The combined structure of the spherical connecting piece and the split type short pipe is adopted, the multi-degree-of-freedom motion characteristic of a spherical pair is utilized, axial stretching, transverse dislocation and torsional composite displacement caused by seismic waves can be effectively absorbed, and the fracture risk caused by pipeline stress concentration is avoided. The split type short pipe is quickly assembled through bolt fastening, and the strict requirement of traditional interference fit for the installation technology is eliminated.

The utility model relates to an anti-leakage pipeline connecting device, which belongs to the technical field of pipeline connection and comprises a bottom plate and two groups of connecting structures arranged at the top of the bottom plate, and sealing structures used for performing tight anti-leakage treatment on the joint of two pipelines are arranged outside the two groups of connecting structures. The sealing structure comprises a corrugated pipe arranged outside the two connecting structures, and an annular air bag is fixedly installed in the corrugated pipe. According to the anti-leakage pipeline connecting device, a pull block is manually pulled to drive a plug rod and a plug plate to move outwards in a piston barrel, at the moment, negative pressure is formed in the piston barrel, external air enters the piston barrel through an air inlet pipe, the plug plate and the plug rod move inwards to extrude air in the piston barrel, the air enters an annular air bag through a conveying pipe, and the annular air bag is expanded; the sealing ring is tightly attached to the outer wall of the pipeline connecting position, a reliable sealing structure is formed, medium leakage is effectively prevented, and the advantage of being good in sealing performance is achieved.

The utility model discloses a valve with a stainless steel surfacing layer, which comprises a valve body, a valve cover, a valve rod and a valve core, the valve body is provided with a valve cavity, two sides of the valve body are provided with an inlet and an outlet which are communicated with the valve cavity, the valve cavity of the valve body is provided with a valve seat for dividing the inlet and the outlet, and the valve body is provided with a valve cover connecting part; the valve cover is detachably mounted on the valve cover connecting part of the valve body; the valve rod is in threaded connection with the valve cover, penetrates through the valve cover and extends into the valve cavity; the valve element is fixedly installed at the lower end of the valve rod and located in a valve cavity of the valve body, and a stainless steel surfacing layer is arranged at the joint of the valve element and the valve rod. The valve rod is suitable for driving the valve element to make contact with a valve seat in the valve cavity in a matched mode through rotation action, and the communication state between the inlet and the outlet is controlled through cooperation of the valve element and the valve seat. The service life of the valve can be prolonged, and meanwhile visual inspection of the abrasion state is achieved.

The utility model relates to the technical field of high-pressure flange ball valves, in particular to a sealing structure of a marine high-pressure flange ball valve, which comprises a valve body, an O-shaped ball valve and valve seats arranged on the left side and the right side of the O-shaped ball valve. The double-pole sealing mechanism comprises two symmetrically-distributed valve seat grooves formed in the valve body, the two valve seats are located in the two valve seat grooves correspondingly, supporting rings are fixedly connected to the interiors of the two valve seat grooves correspondingly, and a plurality of belleville springs distributed in an annular array are fixedly connected between the two supporting rings and the two valve seats correspondingly. The bipolar sealing mechanism abuts against the inner wall of the valve seat groove through a first sealing ring on the outer wall of the valve seat, and a second sealing ring on the inner wall is attached to the outer wall of the O-shaped ball valve, so that two independent and complementary sealing defense lines are formed. The design of double sealing can effectively prevent sudden leakage, and the high safety requirement of a ship system is met.

This invention provides a catheter assembly, a medical delivery device, and a system. The catheter assembly includes an outer tube, an inner tube, and a connecting mechanism. The outer tube is fitted onto a portion of the outer surface of the inner tube and is axially movable relative to the inner tube. The proximal end of the outer tube is sealed to the outer surface of the inner tube via the connecting mechanism. The inner tube includes an inner tube body, and a first limiting portion is provided on the outer surface of the inner tube body. The outer diameter of the first limiting portion is larger than the outer diameter of the inner tube body, and the first limiting portion is disposed within the outer tube. The connecting mechanism includes a first connecting portion and a second connecting portion connected to each other. The first connecting portion is disposed at the proximal end of the outer tube. The second connecting portion is movably fitted onto the inner tube body and is located on the proximal side of the first limiting portion. The second connecting portion is also used to abut against the first limiting portion when the inner tube moves a predetermined distance relative to the outer tube in a distal-to-proximal direction, thereby preventing the inner tube from continuing to move in the distal-to-proximal direction and avoiding separation of the inner tube and outer tube or damage to the seal between them.

The invention relates to the technical field of degradable high polymer materials and disposable personal care products, and discloses a preparation process of a degradable high-barrier plastic film for a hair dyeing shawl, and the preparation process comprises the following steps: 1, preparing chitosan-dopamine grafted modified montmorillonite (CTS-DA-MMT): dispersing 5g of 20-30nm nano montmorillonite in a 2wt% acetic acid solution, and ultrasonically dispersing for 40 minutes by 200W; adding dopamine hydrochloride according to the ratio of montmorillonite to dopamine being 1: 0.2, adjusting the pH value to 8.5 by using 1mol / L NaOH, and carrying out stirring reaction at room temperature for 1 hour; adding chitosan according to the ratio of montmorillonite to chitosan being 1: 0.4, and stirring and reacting at the constant temperature of 50 DEG C for 3 hours; the pH is adjusted to 7.0 through 1 mol / L HCl, centrifugation is carried out for 15 min at the speed of 8000 r / min, washing is carried out three times through deionized water, vacuum drying is carried out for 8 h at the temperature of 60 DEG C, and the product is obtained. According to the preparation technology of the high-barrier plastic film for the degradable hair dyeing shawl, chemical grafting (instead of physical blending) of montmorillonite-dopamine-chitosan is achieved through catechol groups of dopamine, the problems of montmorillonite agglomeration and matrix compatibility are solved, and the degradable hair dyeing shawl is prepared. Meanwhile, through the dynamic adhesiveness of dopamine, the problem of barrier failure under dynamic stretching is solved.

This invention relates to the field of fiber optic sensing technology, specifically to a method for fabricating a low-temperature temperature-sensitive fiber grating based on a negative thermal expansion material coating, and the low-temperature temperature-sensitive fiber grating structure thereof. The method includes the following steps: preparing and pre-treating an optical fiber core layer; coating the outer periphery of the optical fiber core layer with nano-sized zirconium hafnium to obtain a stress transfer layer; preparing a low-temperature negative thermal expansion coefficient sensitizing material powder and coating it on the outer periphery of the optical fiber stress transfer layer to obtain a negative thermal expansion material sensitizing coating layer; constructing a porous structure on the surface of the obtained negative thermal expansion material sensitizing coating layer to form a porous layer on the surface of the negative thermal expansion material; and encapsulating a composite shell structure on the outside of the porous layer on the surface of the negative thermal expansion material to obtain a metal sheath layer. The fiber grating structure provided by this invention, for adapting to the production of temperature sensors, can simultaneously solve the failure problems of traditional sensors in the 4K ultra-low temperature region, the interference problems of electrical sensors in strong electromagnetic field environments, and the sealing failure problems caused by material brittleness in cryogenic environments.

This invention relates to the field of copper busbar insulation coating technology and discloses an automatic copper busbar insulation coating device, comprising: a dip-coating tank for containing dip-coating liquid; a hanging frame movably mounted above the dip-coating tank; at least one clamping unit mounted on the hanging frame for clamping the end of the copper busbar body, the clamping unit including a first clamping member and a second clamping member disposed opposite to each other, which can open and close relative to each other; and a composite sealing layer disposed on the inner surfaces of the first clamping member and the second clamping member for forming a seal with the surface of the copper busbar body in the clamped state. This invention mechanically shields the end of the copper busbar before dip-coating by the clamping unit, leaving the end area uncovered after dip-coating, completely eliminating the manual cutting and adhesive removal process, avoiding quality problems such as incomplete or excessive cutting, and significantly improving production efficiency and product consistency.

The invention discloses an integrated sediment methanogenesis anaerobic culture bottle, and relates to the field of microorganism culture and detection.The integrated sediment methanogenesis anaerobic culture bottle comprises a bottle body and an integrated bottle cap assembly, the integrated bottle cap assembly comprises a main cap body, a barometer, an integrated guide pipe and a sampling one-way valve, the main cap body is in sealed connection with a bottle opening of the bottle body, and the integrated guide pipe is connected with the sampling one-way valve; the barometer is installed on the main cover body, a pressure sensing probe of the barometer is communicated with a headspace in a bottle, one end of the integrated guide pipe is communicated with the headspace in the bottle, and the other end of the integrated guide pipe penetrates through the main cover body to be connected with the sampling one-way valve. The integrated sediment methanogenesis anaerobic culture bottle provided by the invention has the functions of air pressure monitoring, lossless gas taking and convenient sampling, and the accuracy, convenience and data output quality of a sediment methanogenesis long-term culture experiment are remarkably improved.

The utility model provides a water softener. The water softener comprises a resin tank; the salt box is provided with a first containing cavity, a mounting opening and a first limiting part, the first containing cavity is used for containing saline water and the resin tank, the mounting opening is located in the top of the salt box and communicates with the first containing cavity, and the first limiting part is located on the bottom wall of the first containing cavity and matched with the lower portion of the resin tank; the supporting middle shell is arranged on the salt box, covers the mounting opening and is provided with a second limiting part, and the second limiting part is arranged around the upper part of the resin tank; and the flexible part is arranged between the outer wall of the upper part of the resin tank and the second limiting part. The first limiting part arranged on the bottom wall of the salt box is matched with the lower part of the resin tank to limit the horizontal displacement; and meanwhile, the second limiting part of the supporting middle shell is combined with the flexible component to conduct surrounding constraint on the upper portion of the resin tank, horizontal movement is limited, vertical vibration is buffered, stable installation of the resin tank is achieved, and the loosening problem caused by machining errors or deformation is avoided.

This application discloses an end cap assembly, a battery cell, an energy storage device, and an electrical device. The end cap assembly includes an end cap, an upper plastic layer, and a terminal post. The end cap has a through hole for the terminal post. The upper plastic layer has a first mounting through hole on its main body and a second mounting through hole on its protruding portion. The inner wall surface of the second mounting through hole includes a first anti-rotation surface. The outer peripheral surface of the main body includes a positioning surface, which is a plane. The upper plastic layer is disposed on the end cap, the protruding portion passes through the terminal post through hole, and the main body is disposed on the top surface of the end cap. The outer peripheral surface of the first column of the terminal post includes a second anti-rotation surface. The terminal post is mounted on the upper plastic layer, the protrusion of the terminal post passes through the first mounting through hole, and the first column passes through the second mounting through hole. The second anti-rotation surface is in contact with the first anti-rotation surface, and the second anti-rotation surface and the first anti-rotation surface are mutually anti-positioned along the circumferential direction of the terminal post. The protrusion of the terminal post passes through the first mounting through hole. The end cap assembly provided by this application can prevent the terminal post from twisting when subjected to external force, thereby improving the sealing performance of the terminal post.

The application discloses an engine with a built-in sodium-filled heat superconducting element cylinder cover and a structure thereof, and relates to the technical field of vehicle engines.The engine cylinder cover is characterized in that the bottom surface of the engine cylinder cover is shaped into a cylinder cover combustion chamber, the inside of the engine cylinder cover is provided with a cylinder cover water jacket, and at least one closed sodium-filled heat superconducting element is embedded in the solid inside between the cylinder cover combustion chamber and the cylinder cover water jacket of the engine cylinder cover; the inside of the sodium-filled heat superconducting element is provided with a vacuumized sodium-filled cavity, the sodium-filled cavity is filled with a heat transfer medium, one end of the sodium-filled heat superconducting element close to the cylinder cover combustion chamber is provided with a heat absorbing end, and the other end of the sodium-filled heat superconducting element close to the cylinder cover water jacket is provided with a heat dissipating end.The application reduces the physical peak temperature of a local area, reduces structural thermal stress, and eliminates a local high-temperature surface that can cause engine knock.

The utility model relates to the technical field of mechanical equipment, in particular to a micropore throttling hydrostatic guide rail sliding block which comprises a sliding block body, and the lower end face of the sliding block body is provided with a first oil outlet face and an oil injection hole at the same time. The side end face, close to the guide rail, of the sliding block body is provided with a second oil outlet face. A first oil way and a second oil way are arranged in the sliding block body, one end of the first oil way communicates with the oil injection hole, the other end of the first oil way extends to the second oil outlet face, one end of the second oil way communicates with the first oil way, and the other end of the second oil way communicates with the first oil outlet face. According to the utility model, the micro-pore integrated oil path is used for replacing a modularized thin film throttler in the prior art, so that the structure is simplified, the reliability is improved, the manufacturing cost is reduced, the stability of an oil film is optimized through a capillary throttling network, and the bottleneck problem caused by the dependence of an elastic element and complex assembly in the prior art is effectively solved.

This utility model discloses a fresh-mixed beverage bottle cap, comprising an upper cap, a middle cap, and a lower cap. The upper cap includes a top cap and an anti-theft ring connected below the top cap. The inner wall of the top cap has internal threads that mate with the middle cap. The anti-theft ring is fitted around the middle cap, with one part connected to the top cap via a point connection and the other part connected to the top cap via a pull strip. The two sides of the pull strip are respectively connected to the top cap and the anti-theft ring via point connections. The lower cap is inserted into the beverage bottle and screwed onto the bottle neck. The middle cap is inserted into the lower cap, and the upper cap is screwed onto the middle cap, sealing the top of the middle cap to form a cavity for storing honey. Through the cooperation of a guide post and a guide groove, the middle cap moves downward within the lower cap, puncturing the bottom of the lower cap, allowing the honey in the cavity to flow into the beverage bottle through the puncture. The upper, middle, and lower caps employ a multi-stage sealing system. Through a precision sealing structure, the pre-treated honey meets the colony count requirements, with a residual crystal nucleus content of ≤2%, preventing damage to the seal due to crystal expansion during storage.

This utility model belongs to the field of cadmium telluride BIPV technology, specifically relating to a cadmium telluride insulated photovoltaic glass for back-connected junction boxes. It includes an outer encapsulation glass layer, with a cadmium telluride power generation chip adhered to one side of the outer encapsulation glass layer, and an inner encapsulation glass layer adhered to the side of the cadmium telluride power generation chip away from the outer encapsulation glass layer. A sealing ring and sealant are used to maintain a seal at the circular hole between the sealing ring and the inner and outer encapsulation glass layers, thus sealing the hollow cavity layer. The positive and negative electrodes of the cadmium telluride power generation chip on the side closest to the inner encapsulation glass layer converge at the circular hole via conductive adhesive strips, and then connect to the junction box through the center of the sealing ring. This allows the back-connected cadmium telluride laminated monolithic product to be combined with the insulated glass product, enabling the cadmium telluride laminated monolithic product to be connected to the junction box while retaining the sound insulation, heat insulation, and thermal insulation functions of the insulated glass product.

The utility model belongs to mechanical or structure part static balance test technical field, concretely relates to airtightness detection mechanism for membrane electrode and airtight integrated machine using it, include: hydraulic drive position, detection position, pull rod guide pillar, pressure head traction plate, main hydraulic cylinder, upper pressure head, lower pressure plate seat, lower pressure plate, track assembly, pressure head traction plate swing joint in pull rod guide pillar, upper pressure head is connected in the downside of pressure head traction plate. The utility model through setting in pressure head traction plate, will main hydraulic cylinder and upper pressure head change into indirect connection, will lower pressure plate and multiple lower pressure plate seat contact fit, and track assembly sets up between two lower pressure plate seats, can maximize increase lower pressure plate and lower pressure plate seat contact area, reduce the pressure intensity of lower pressure plate bottom, make it can adapt 5Mpa's high pressure airtightness test, through the way of upper pressure head and lower pressure plate cover pressure to membrane electrode fixed, through blowing gas and detecting air flow fluctuation to judge whether there is gas leakage and then acquire airtightness.

The utility model belongs to capric acid glyceride production equipment technical field, concretely relates to a kind of enzyme synthesis capric acid glyceride reaction kettle, including reaction kettle, agitator, it is characterized by: reaction kettle top is equipped with the quick sampling mechanism installed by tank top flange one, tank top flange two, quick sampling mechanism includes the pipeline system of venturi, suction tube, connecting pipe, wherein the top end of suction tube is connected to venturi throat, the bottom end of suction tube is inserted into the inside of reaction kettle, venturi two ends are connected nitrogen valve and backwash valve respectively, backwash valve connects reaction kettle inside, connecting pipe connects sample release pipe, sample release valve is installed on sample release pipe, nitrogen valve is connected with nitrogen pipeline.The flow of nitrogen in venturi safely and conveniently takes out reaction liquid, effectively improves sampling convenience and safety;Reaction liquid can be circulated in quick sampling mechanism and reaction kettle to avoid sample cross-contamination.

The application provides a radial sealing structure and mounting method, which comprises the following steps: preparing for sealing, placing the sealing cover and the sealing cylinder in the vacuum box after aligning, vacuumizing and pressure-keeping of the vacuum box, inflating the vacuum box to mount the sealing cover in place, and mounting and tightening the connecting screw. The application adopts a special mounting method, which can effectively reduce the mounting difficulty of the sealing structure, ensure the mounting of the sealing structure in place, maintain the pre-tightening force of the mounting screw, and prevent the sealing structure from losing sealing effect due to the reduction of the pre-tightening force.

The utility model relates to ball valve technical field, concretely, it relates to a kind of slurry ball valve based on multistage sealing, including valve body, the both sides symmetry fixed connection of valve body have connecting body, the inside of valve body is provided with ball, the lower end of ball is rotatably connected with fixed shaft, the upper end of inside fixed shaft and ball contact position is provided with steel ball, in the process of frequently opening and closing or adjusting valve, effectively avoid the sealing failure caused by ball and upper valve shaft deviation, increase the positional accuracy of ball, the upper end of ball is fixedly provided with upper valve shaft, the outside of upper valve shaft is provided with packing gland, effectively prevent slurry along valve shaft leakage, the packing gland and upper valve shaft between are provided with sealing packing, the valve seat is arranged between the connecting body and ball, the valve seat one end and connecting body between are provided with baffle ring, form the first core sealing defense line of valve flow channel, improve sealing reliability.

The utility model discloses a quick detachable sealing structure, including sealing bolt, sealing ring and sealing groove, sealing bolt has head and screw rod part, and screw rod part is suitable for screw hole, and sealing ring is sleeved on the screw rod part of sealing bolt. The quick detachable sealing structure is through the sealing bolt is spun into screw hole, and the head lower end surface will extrude sealing ring, makes it fill the gap between lower end surface and sealing groove and microcosmic uneven place fully, forms the dead angle -free sealed interface, and sealing ring is sleeved on the outer periphery of screw rod part, can form the auxiliary seal with screw hole entrance hole wall simultaneously, double -guarantee blocks the helium gas leakage path, avoids the sealing failure problem caused by traditional sealant partial check crack, quick plug connector sealing ring misplacement, utilizes the static seal of sealing ring under the pressure deformation of end face, and the sealing effect is excellent, only needs to tighten or loosen sealing bolt and can realize the sealing or disassembly, and the disassembly process does not need the violent operation, and the tool body thread or sealing element itself will not be damaged.

This utility model relates to a valve seat hard seal structure, comprising a ball, a valve seat, and a valve body connected in sequence. A pre-compression assembly is provided between the valve seat and the valve body. The pre-compression assembly includes a support ring and a pre-compression member disposed between the support ring and the valve body. The valve seat is stepped, including a first stepped portion, a second stepped portion, and a protrusion on the end face of the second stepped portion near the valve body, wherein the protrusion is embedded in a groove on the support ring and a sealing ring is fitted on the unembedded portion. This utility model provides a valve seat hard seal structure in which the pre-compression assembly can provide continuous pre-tightening force, which can compensate for gaps caused by temperature changes, pressure fluctuations, or component wear, ensuring that the valve seat and the ball are always tightly fitted and maintaining a stable seal.

The utility model relates to thin wall class spare processing frock technical field, concretely relates to a kind of chuck frock for thin wall class spare processing. Including bottom plate, suction part, sealing assembly and multiple limit parts, suction part is fixed by negative pressure spare to be processed, sealing assembly is constituted by sealing groove and sealing strip, along the periphery of suction part arrangement, with suction part and limit part jointly form closed continuous sealing structure, limit part is set to sealing assembly periphery, for with the outer edge of spare to be processed abut.In the contact state of limit part and spare to be processed, the distance of limit part to sealing assembly close to suction part side is defined as sealing margin, for determining the minimum reserved edge width required by spare to be processed.The utility model can reduce the waste of material by reducing the sealing margin of spare to be processed.