1696results about How to "Guaranteed tightness" patented technology

The invention provides a sealing joint test system and test method. The sealing joint test system comprises a test platform, a first fixing mechanism, a second fixing mechanism, a first load applying mechanism, a second load applying mechanism, a pressure test mechanism and a heating temperature control mechanism. The first load applying mechanism is used for applying an axial load to the sealing joint; the second load mechanism is used for applying a bending moment load to the sealing joint; the pressure testing mechanism is used for applying pressure to the sealing joint; and the heating temperature control mechanism is used for heating the sealing joint to a preset temperature and keeping the temperature of the sealing joint unchanged. According to the sealing joint test system provided by the invention, the first load applying mechanism, the second load applying mechanism, the pressure test mechanism and the heating temperature control mechanism are arranged to test the sealing joint in the environments of axial load, bending moment load, ultrahigh pressure and high temperature, so that the sealing performance of the sealing joint is ensured.

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

This invention discloses a grouting and sealing device for fault water hazard prevention, relating to the field of underground grouting and sealing technology in coal mines. It includes a grouting component body with a feed pipe fixedly installed on its inner surface. The grouting component body is equipped with at least two sealing mechanisms. Through the arrangement of these sealing mechanisms, when encountering a gourd-shaped borehole, the segmented arrangement of the first and second expansion capsules allows the external air supply end to inflate the first expansion capsule. With the cooperation of the connecting and limiting components, the first and second expansion capsules are positioned in the larger and smaller diameter areas of the gourd shape, respectively. This allows the first and second expansion capsules to expand to appropriate sizes after expansion, respectively, to cooperate with different areas during sealing. This avoids poor contact with the gourd-shaped borehole wall during sealing, increases the sealing contact area with the borehole wall, and ensures the sealing effect during grouting and sealing.

The application provides a carbon fiber precursor solution sampling method, which comprises the following steps: S1. providing a sealed container with a sampler inside, wherein the sealed container is a closable sealed container; and S2. placing the sealed container on a displacement assembly at position one. The carbon fiber precursor solution sampling method adopts automatic sampling, greatly reduces the labor intensity, and is safe and reliable. The medium in the reaction kettle is sealed through the closed sealed cavity and the closable channel between the sealed cavity and the reaction kettle, the sealing property of the high-temperature corrosive medium is ensured, air is prevented from entering the reaction kettle and contacting the high-temperature corrosive medium to generate toxic and harmful substances, the air in the sealed cavity is replaced by inert gas, the sealing property of the high-temperature corrosive medium is ensured, and the sealed container can be disassembled to take out the sampler through the setting of the opening and closing assembly and the tightening of the sealed container, so that the leakage of the toxic medium is avoided.

This utility model provides an internal gear pump with crescent-shaped blocks, including a pump body, a pump cover, an internal gear ring, and an external gear meshing with the internal gear ring. An outer crescent-shaped block and an inner crescent-shaped block are disposed between the internal gear ring and the external gear. The outer crescent-shaped block has an outer arc surface that can engage with multiple tooth tips of the internal gear ring. The inner crescent-shaped block is composed of a first inner crescent-shaped block and a second inner crescent-shaped block, both of which have inner arc surfaces that can engage with multiple tooth tips of the external gear. A positioning pin is installed between the first and second inner crescent-shaped blocks. A pin hole is provided at one end of each of the first and second inner crescent-shaped blocks near the positioning pin for installing a rotating pin. The first and second inner crescent-shaped blocks can rotate around the rotating pin. A notch is provided in the middle of the outer crescent-shaped block corresponding to the positions of the two positioning pins. Rubber rods and springs are provided between the outer crescent-shaped block and the first and second inner crescent-shaped blocks to compensate for the radial clearance between the inner and outer crescent-shaped blocks.

This utility model discloses a mud crab spawning and hatching device, including a cement pool, which comprises a pool body with a permeable stone slab at the bottom. A hole is opened at the bottom right side of the pool body, and a drain pipe is installed inside the hole. A water supply component includes a water quality sensor located on the left side of the pool body. An air supply component includes a dissolved oxygen sensor located at the front of the pool body. A heating component includes a temperature sensor located at the front of the pool body. A movable component is installed at the top of the pool body, with a polycarbonate panel fixedly connected to its inner side. This utility model, through the structural design of water quality, dissolved oxygen, and temperature sensors, combined with water supply, air supply, and heating systems, can monitor and adjust key environmental parameters in the hatching pool in real time. The water quality sensor, linked to a solenoid valve, intelligently changes water to prevent water quality deterioration. Microporous aeration heads uniformly increase oxygen, ensuring balanced dissolved oxygen distribution. Heating pipes, in conjunction with the temperature sensor, maintain a stable water temperature.

The present application relates to the technical field of shale gas sampling, in particular to a shale gas exploitation sampling device and method, the device comprises a box body and an inspection door, a filter box is arranged in the upper middle part of the box body, a low-temperature box is arranged in the lower middle part of the box body, an adsorption box is arranged in one end of the box body, a shunt pipe is arranged on the inner wall of the bottom end of the low-temperature box, a cooling mechanism for low-temperature water removal is arranged in the low-temperature box, a filtering mechanism for automatic filtering and automatic cleaning is arranged in the filter box, an adsorption mechanism for adsorption is arranged in the adsorption box, and a connecting mechanism for connecting a sampling pipeline is arranged in one end of the box body. The device can be suitable for sampling pipelines of different sizes and shapes, can ensure the firmness and sealing property of the connection, can automatically sample and purify different shale gases comprehensively, and can ensure the accuracy and sufficient amount of sampling.

The utility model belongs to the technical field of breathing tubes, and particularly relates to a telescopic water accumulation prevention breathing tube for a breathing machine. According to the technology, two corrugated breathing tubes and two connecting tubes are included, the two connecting tubes are located between the corrugated breathing tubes at the two ends, fixing tubes penetrating through the connecting tubes are arranged on the two corrugated breathing tubes and correspond to the two connecting tubes, the fixing tubes are rotationally connected with the connecting tubes, a guide tube of a Y-shaped structure is arranged between the two connecting tubes, and the guide tube is connected with the two connecting tubes. The two water inlet ends of the guide pipe are connected and communicated with the two connecting pipes, the water outlet end of the guide pipe is in threaded connection with a water accumulation bottle used for collecting water accumulated in the corrugated breathing pipe, and a sealing assembly used for dredging or blocking the water outlet end of the guide pipe is arranged at the water outlet end of the guide pipe. According to the corrugated breathing tube, accumulated water in the corrugated breathing tube can be well collected, meanwhile, the sealing performance of the corrugated breathing tube is ensured, and the oxygen supply effect of the corrugated breathing tube is ensured.

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The utility model discloses a kind of installation structure of copper busbar, to provide a kind of installation structure of copper busbar when installing copper busbar can be quickly inserted and installed.It includes: copper bar main body, the both ends of copper bar main body are equipped with mounting hole;Plug-in assembly, the plug-in assembly is installed on copper bar main body and corresponds with mounting hole;Expansion block, the expansion block is installed on plug-in assembly.The beneficial effects of the utility model are: when installing copper busbar, it can be quickly inserted and installed, the tightness of sticking can be guaranteed, plug-in assembly can be conveniently disassembled, plug-in assembly can be fixed, fixed block shape can be supported, expansion block can be prevented from coming out, and fixed block can be protected.

The utility model belongs to the technical field of chemical equipment, and discloses a low-temperature dangerous chemical reagent storage cabinet. A low-temperature dangerous chemical reagent storage cabinet comprises a storage cabinet body, an equipment placement cabinet, a support, a cabinet door and a reagent placement table, the storage cabinet body is in a hollow shape with an opening in one longitudinal side, and the reagent placement table can be detachably installed in the storage cabinet body; the equipment placing cabinet is arranged below the storage cabinet body in a connected mode, cooling equipment can be placed in the equipment placing cabinet, and the support is arranged below the equipment placing cabinet in a connected mode. Through cooperative work of the heat absorber and the closed-loop water cooling system, rapid cooling is achieved, the low temperature in the cavity is maintained, the cooling device is suitable for chemical reagents sensitive to the temperature, the damping device effectively absorbs vibration of the cooling device, and collision between reagent bottles caused by vibration generated when the cooling device works is avoided.

This application discloses a positive pressure connector with a rotatable retaining ring, comprising an inner liner, a three-way outer shell, an elastic capsule, and a rotatable retaining ring. The three-way outer shell includes a connecting outer shell and a connecting side tube connected thereto. The two ends of the connecting outer shell are an installation port and a liquid inlet, respectively. The inner liner includes a connecting post and a stop plate. The stop plate is connected to the outside of the connecting post and to the installation port of the connecting outer shell. One end of the connecting post extends into the connecting outer shell and connects to the elastic capsule. An infusion inner hole is formed along the length of the end of the connecting post away from the elastic capsule. A communicating inner hole is formed along the radial direction on the connecting post. The two ends of the communicating inner hole communicate with the infusion inner hole and the inner cavity of the connecting outer shell, respectively. The rotatable retaining ring includes a rotating tube and a rotating ring plate connected to one end of the rotating tube. The rotatable retaining ring is rotatably connected to the connecting post through the rotating ring plate. This application effectively ensures the sealing and reliability of the positive pressure connector after locking the indwelling needle, and reduces the possibility of connector damage.

The utility model discloses a lithium ion battery fluid collecting device, and belongs to the technical field of lithium ion battery detection auxiliary equipment. The device is provided with a gas collection chamber, a puncture device arranged at the gas inlet end of the gas collection chamber, and an exhaust soft rubber sealing joint arranged at the exhaust end of the gas collection chamber, the flexible glue adsorption head is mounted at the bottom end of the puncturing device and is used for being adsorbed on the surface of the lithium ion battery in a sealing manner; the bottom end of the puncture device is provided with a puncture needle capable of penetrating into a closed cavity formed by the flexible glue adsorption head and the surface of the lithium ion battery, and the bottom end of the puncture device is further provided with an adjusting device which can be penetrated by the puncture needle and is used for compensating the length of the puncture device. The gas collecting device has the advantages of being simple in structure, convenient to operate and high in gas collecting efficiency.

The utility model provides a kind of corrosion -resistant spiral steel pipe, the utility model includes spiral inner tube body and seamless outer tube body, and interlayer space is formed between spiral inner tube body and seamless outer tube body, and interlayer space is filled with heat preservation filling layer, the outer surface of spiral inner tube body and the inner surface of seamless outer tube body are equipped with corrosion -resistant coating, and the both ends of spiral inner tube body and seamless outer tube body are respectively equipped with first connecting frame and second connecting frame, the edge of first connecting frame is equipped with insert block one, the edge of second connecting frame is equipped with the slot compatible with insert block one, the edge of second connecting frame is equipped with insert block two, the edge of first connecting frame is equipped with the slot compatible with insert block two, and the opening is formed between first connecting frame and second connecting frame, and reinforcing strip is inserted in the opening.The utility model can improve environmental adaptability by double corrosion -resistant coating, optimize the sealing property of connecting structure, enhance the synergistic effect of reinforcing strip and heat preservation layer, to prolong service life and ensure operating stability.

This utility model relates to the field of valve body technology, and in particular to an impact-resistant high-temperature and high-pressure valve body, comprising a valve body and an impact-resistant plate. The inner wall of the valve body has an inlet chamber and a drain chamber, which are connected. A limiting groove is formed in the inner wall of the inlet chamber, and the impact-resistant plate abuts against the limiting groove, with its outer peripheral wall in sliding contact with the inner wall of the limiting groove. Multiple flow holes are formed on the outer wall of the impact-resistant plate, with the diameter of the flow holes increasing from the middle to both ends. In this utility model, by setting up the impact-resistant plate, the impact force of the fluid is transferred from the inner wall of the valve body to the impact-resistant plate, avoiding direct impact on the valve body. The design of the flow holes with increasing diameter from the middle to both ends reduces the flow velocity and disperses the pressure when the fluid passes through, further reducing the impact of the fluid on the valve body, preventing fatigue, wear, and cracks in the valve body material, extending the service life of the valve body, and ensuring safe operation of the equipment.

The utility model relates to the technical field of vehicle-mounted electric control cover plate die-casting, and discloses a new energy vehicle-mounted electric control cover plate die-casting device which comprises a die-casting device body, a baffle is fixedly connected to the left side of the top of the die-casting device body, a die-casting mechanism is arranged at the top of the die-casting device body, and a base is fixedly connected to the bottom of the die-casting device body. A collecting mechanism is arranged at the bottom of the die-casting device body, the die-casting mechanism comprises a die-casting assembly and a stirring assembly, the die-casting assembly is arranged at the top of the die-casting device body, and during use, through the arranged die-casting mechanism, when a vehicle-mounted electric control cover plate needs to be subjected to die-casting work, a first servo motor drives a first threaded rod to rotate; the hydraulic cylinder pushes the push plate, raw materials in the conveying pipe stably and accurately enter the first die, the right side of the second die makes close contact with the left side of the first die, and the sealing performance of the dies in the die casting process is guaranteed.

The newspaper conveying device for the printing machine comprises a body, two dust collecting cylinders are rotationally arranged on the input side of an inner cavity of the body, a plurality of dust collecting grooves are formed in the outer walls of the dust collecting cylinders at equal intervals, a plurality of sponge strips are fixedly arranged on the outer walls of the dust collecting cylinders, and the sponge strips and the dust collecting grooves are arranged in a penetrating mode. The sponge strip on the dust collection cylinder at the bottom can make contact with the conveying line, and the shaft ends, corresponding to one side of the dust collection box, of the dust collection cylinders are each of a cavity design. According to the conveying device, the two dust collection cylinders are arranged on the input side of the conveying line, dust on the two faces of paper can be removed at the same time, meanwhile, the sponge strip can synchronously remove dust on the conveying line, overall cleaning of the paper and the conveying line is guaranteed, the paper can be stably printed when passing through the conveying line, and the printing efficiency is improved. And under the arrangement of the arc-shaped isolation plates, dust collection channels of the dust collection grooves are all located on the surfaces of the paper and the conveying line, the dust collection strength is further improved, and wasted resources are reasonably utilized.

The utility model relates to portable crop pest killer technical field especially portable crop pest killer, including pest killer shell, the pest killer shell is provided with connecting mechanism, the connecting mechanism contains the first assembly of setting in the pest killer shell upper section, the second assembly is provided with in the pest killer shell middle section, the third assembly is provided with in the pest killer shell lower section. Portable crop pest killer adopts the physical pest killing mode of double pest killing lamp first pest killing lamp and second pest killing lamp combination airflow suction, avoids the use of chemical pesticide, effectively reduces the pollution to the ecological environment such as soil, water source, the top drive motor drives the fan blade to produce downward airflow, the bottom exhaust fan provides strong suction, both cooperate with each other, accelerate the pest to move to the pest killer inside and transport to the collecting cylinder, again cooperate with the control of the falling rhythm of the pest of rotary plate and fixed baffle, significantly improve the pest trapping and collection efficiency, and the pest killing effect is greatly promoted.

The application discloses a kind of stainless steel gutter side TPO fixed structure, including galvanized support by pin fixed on gutter keel;With the fixed stainless steel gutter socket type fixed folding piece of stainless steel;Roof TPO waterproof roll goods are fixedly connected with socket type fixed folding piece of stainless steel and galvanized support device.The application adopts galvanized support piece, and it has gutter fixing and TPO roll support function, improves the stability of overall structure;The application adopts socket type fixed folding piece of stainless steel and is welded with gutter, to ensure reliable connection, excellent waterproof performance;TPO waterproof roll goods in the application and fixed folding piece are mechanically connected and sealed by glue injection, to enhance wind lifting capacity and waterproof tightness;The structure and process of the application can ensure overall sealing effect even in the case of TPO non-full-paved gutter, to prevent rainwater from pouring into indoor.

This utility model relates to the field of capacitor electrolyte treatment technology and discloses a capacitor electrolyte purification and impurity removal device, including a storage tank for storing capacitor electrolyte, a flexible tube connected to the bottom of the storage tank, a tank body fixed to one side of the storage tank, and a tank cover connected to the top of the tank body by bolts; a stirring assembly for stirring the electrolyte is provided on the top of the storage tank; a filter screen is provided inside the tank body for removing impurities from the electrolyte. By setting the stirring assembly on the top of the storage tank, the rotating shaft is driven by a motor to drive the stirring blades to fully stir the electrolyte, effectively preventing the electrolyte from settling or separating, thereby improving the uniformity of the electrolyte. By setting the filter screen inside the tank body, after the electrolyte enters the tank body, it passes through the filter screen for impurity removal. Impurities are trapped on the filter screen, and the clean electrolyte is discharged through the outlet pipe, effectively removing solid impurities from the electrolyte and improving the purity of the electrolyte.

A proxy value allocation and instant settlement system for atomic tasks is disclosed. The task decomposition module is configured to receive complex tasks and decompose them into multiple atomic subtasks using a directed acyclic graph (DAG) algorithm. Each atomic subtask is bound to a dynamic identity identifier of the executor proxy. A value weight allocation module, connected to the task decomposition module, is configured to calculate the value weight and corresponding settlement amount for each atomic subtask based on preset indicators. A fund locking module, connected to the value weight allocation module, is configured to pre-lock the total task funds at a distributed settlement node using a smart contract and set release conditions. This invention, by utilizing the DAG construction unit within the task decomposition module during the task initiation phase, can decompose complex macro-objectives into a set of atomic subtasks with independent executability and verifiability, eliminating the risks of identity theft and responsibility shirking during task execution and laying the foundation for subsequent settlement.

This utility model provides a stainless steel air conditioning pipe, relating to the field of air conditioning pipe technology, comprising: a straight air conditioning refrigerant pipe, wherein an air conditioning refrigerant elbow is connected to the side end of the straight air conditioning refrigerant pipe via a pipe fitting; a stainless steel outer pipe layer is provided on the outer side of the straight air conditioning refrigerant pipe, and a copper inner pipe layer is laminated on the inner side of the stainless steel outer pipe layer; the surface of the copper inner pipe layer is coated with a nano-modified coating and a PTFE inner lining layer; the pipe fitting is welded to the copper inner pipe layer via a connecting inner pipe; and a pipe clamp is fixed to the outer end of the pipe fitting. This utility model solves the problem in the prior art where the copper pipe and stainless steel pipe are welded together as a single piece, resulting in inconvenience during the transportation and installation of stainless steel air conditioning pipes.

This utility model relates to the technical field of biscuit processing equipment, specifically a hard-limit positioning pin mechanism. It includes a frame, a drive shaft located at the center of the top surface of the frame, a turntable mounted on the top of the drive shaft, and positioning components mounted on the outer circumference of the drive shaft. Multiple positioning seats are mounted on the top surface of the frame, circumferentially along the drive shaft. Rotation of the drive shaft causes the positioning components to engage with positioning seats at different positions. In this hard-limit positioning pin mechanism, the engagement of the positioning components and positioning seats forms a hard-limit structure. The arc-shaped design of the positioning head and positioning groove, combined with the preload of a spring, allows for precise engagement when the drive shaft drives the turntable to a preset position. This mechanism directly constrains the positional deviation of the turntable through mechanical hard limiting, effectively solving the problem of cumulative errors caused by speed fluctuations and component wear. It avoids misalignment between the forming cavity and the processing components, fundamentally eliminating uneven distribution of compressed biscuit raw materials and deformation of the shape.

The utility model relates to a maritime work mass concrete pile foundation anti-corrosion device which comprises an outer-layer protective shell, a middle-layer spacing shell and an inner-layer anti-corrosion shell, and the outer-layer protective shell, the middle-layer spacing shell and the inner-layer anti-corrosion shell are all cylindrical shells formed by assembling two semi-cylindrical shells. The inner-layer anti-corrosion shell, the middle-layer spacing shell and the outer-layer protection shell are sequentially arranged on the outer side of a concrete pile foundation in a sleeving mode from inside to outside, a first reaction cavity is formed between the outer-layer protection shell and the middle-layer spacing shell, and a second reaction cavity is formed between the inner-layer anti-corrosion shell and the middle-layer spacing shell. A plurality of first reaction rods are horizontally arranged on the middle-layer interval shell in an array mode, a plurality of second reaction rods are horizontally arranged on the inner-layer anti-corrosion shell in an array mode, and hydrophobic materials used for reducing the seawater permeation speed are clamped between the connecting pieces at the two ends of the two semi-cylindrical shells. And the anti-corrosion capability of the concrete pile foundation is obviously improved.

The utility model discloses a cooling system in magnetron sputtering coating equipment. Cooling media are provided for cooling circulation of a rotating cathode, an air supply assembly and a vacuum coating chamber top plate in the magnetron sputtering coating equipment. The cooling system comprises a water supply main pipe and a water return main pipe. A first water supply port is formed in the water supply main pipe; a first water return port is formed in the water return main pipe; the first water supply port and the first water return port form a group and correspond to one rotating cathode in the coating chamber, so that the coating quality is improved; a second water supply port is formed in the water supply main pipe; a second water return port is formed in the water return main pipe; the second water supply port and the second water return port form a group and correspond to the air supply component on one side in the coating chamber, so that the air supply plate is prevented from deforming, and the air supply uniformity is ensured; a third water supply port is formed in the water supply main pipe; a third water return port is formed in the water return main pipe; and the third water supply port and the third water return port form a group and correspond to an annular cooling runner on the top plate of the vacuum coating chamber, so that the sealing performance of the vacuum coating chamber is ensured.

The application discloses a non-premixed combustor capable of simultaneously generating oxidation environment and reduction environment and relates to the technical field of combustors.The combustor comprises an oxidation gas cavity cover plate, an oxidation gas cavity I, an oxidation gas cavity II, a fuel gas cavity I, a fuel gas cavity II, a gas fuel pipe group and a center powder feeding pipe and the like modules, can simultaneously generate oxidation environment and reduction environment, and can flexibly replace different types of optical windows, flexibly adjust flame intensity and flexibly adjust the length of the center powder feeding pipe extending out of the oxidation gas cavity cover plate, is a non-premixed combustor capable of simultaneously generating oxidation environment and reduction environment, and has the advantages of simple and compact structure, safe and convenient operation, high flexibility and stable planar flame generation.

The utility model discloses a carbon capturing and collecting device with high sealing performance, which belongs to the technical field of carbon capturing, solves the problem that the sealing performance of the existing carbon capturing and collecting device is defective when the existing carbon capturing and collecting device is used, and comprises a collecting box, a heating plate, an air guide window plate and an exhaust fan, and the heating plate is arranged on the surface of the collecting box. A sealing mechanism and an air guide window plate are arranged, a sealing plate capable of vertically ascending and descending is used for shielding and sealing an air outlet and an air inlet in the two sides of the interior of a collecting box, the sealing effect of the interior of a box body is guaranteed, when a linkage rod moves, a meshing toothed plate synchronously moves along with the linkage rod, and when the meshing toothed plate is meshed with a meshing gear, the meshing toothed plate is meshed with the meshing gear. The angle of the closing plate can be driven to change, so that the whole air guide window plate is in a closed state, external gas is prevented from entering and internal gas is prevented from flowing out, the heating effect in the equipment is more efficient and stable, and the overall working quality of the equipment is improved.

The application discloses a light-proof flow cell and relates to the field of particle counter accessories, which comprises a first shell and a second shell, flow holes are formed in the first shell and the second shell, a wear-resistant light-blocking layer is arranged between the first shell and the second shell, a plurality of first plug-in holes are formed in the second shell, and a plurality of corresponding first plug-in columns are arranged in the plurality of first plug-in holes. The first shell and the second shell are made of quartz diamond material, and the hardness is high, so that the contact with the detection liquid is diamond material, the wear resistance can be improved, the first plug-in hole and the first plug-in column are arranged at four corners and are matched, and the butt joint precision is improved, so that the grinding effect of the flow holes by the grinding liquid can be effectively reduced, the phenomenon that the pore size of the flow cell becomes large can be avoided, and therefore the accuracy is not greatly affected during counting, and the stability during use and the counting accuracy are improved.

The application discloses a rotary variable integrated forming structure, which comprises a power base, a die base fixedly arranged above the power base, a sealing base arranged on the die base and an ejection push rod arranged below the power base, a rotary frame cylinder is rotationally arranged above the power base, a rotary base is arranged above the rotary frame cylinder, a plurality of arc limiters are arranged in an annular array on the rotary base, a positioning disc is arranged on the inner side of the die base and above the rotary base, a plurality of straight limiters are arranged in an annular array on the positioning disc, tooth blocks are slidably arranged in the straight limiters, mold teeth are arranged on the tooth blocks, the bottom of the tooth blocks is slidably arranged in the arc limiters, an upper mold disc is arranged below the sealing base, a lower mold disc is arranged at the end of the ejection push rod and a plurality of fixing blocks are arranged above the lower mold disc, after injection molding is completed, the upper mold disc is first separated, then the lower mold disc is rotated and moved upwards, and the injection molded part can be separated from the mold teeth, so that the problem that the injection molded part is not easy to separate during the integrated forming in the injection molding process is solved.