92 results about "Mechanical valve" patented technology

The mechanism in the invention provides a solution for automated, remote regulating high pressure air in the industrial air tube system. With double layer electromagnetic valves, the mechanism assure the comfortable and safe working platform for humans and equipment. The mechanism comprises: mechanical valve, 20 L pneumatic tank, pressure gauge, sealed metal box, static disc, electromagnetic relay with movable stem, capacitor, low pressure air tube, high pressure air tube, electrical wire, electromagnetic relay.

The utility model generally relates to the technical field of bathroom equipment, in particular to a flushing connection structure and a closestool, the flushing connection structure comprises a valve body and a spray head, the valve body is connected with the spray head through a pipeline, the valve body is provided with a valve port, the pipeline is connected between the valve port and the spray head, and the spray head is connected with the valve port. The spray head further comprises a connecting piece used for being connected with the pipeline, and the spray head is detachably connected to the connecting piece and then is communicated with the pipeline. Furthermore, a more stable, rapid and high-compatibility connecting scheme is provided for connecting a reversing valve pipeline to a spray head, and the reversing valve is suitable for various electronic or mechanical valve bodies, good in universality and easy to apply and popularize.

The invention belongs to the technical field of robots, and discloses a mechanical valve auxiliary operation robot which comprises a moving platform and a multi-degree-of-freedom mechanical arm. The multi-degree-of-freedom mechanical arm is mounted on the moving platform, and a three-jaw floating electric spindle is mounted at the tail end of the multi-degree- The multi-degree-of-freedom mechanical arm comprises a first overturning frame, a second sliding frame, a rotating frame and a second overturning frame; the three-jaw floating electric main shaft is mounted on the second turnover frame; the first overturning frame is rotationally mounted on the moving platform; the second sliding frame is installed on the first overturning frame in a sliding mode and driven by a second sliding driving device to slide. The rotating frame is rotationally mounted on the second sliding frame; the second overturning frame is rotationally mounted on the rotating frame; the three-jaw floating electric spindle is integrated with a visual monitoring system, and the situation of a working area can be monitored in real time. The device can be automatically navigated and positioned to a designated position, the valve is grabbed and rotated according to the required opening degree according to different flange plate sizes and structures of the valve, and opening or closing of the valve is achieved.

The utility model relates to an overhung strong on-off hollow gas-proof feedback pump and relates to the technical field of oil pumping pumps, comprising upper and lower pump cylinders arranged side by side from top to bottom, the upper and lower pump cylinders being connected through a sand-set gas-proof coupling, the inner diameter of the sand-set gas-proof coupling being greater than the inner diameters of the upper and lower pump cylinders, a flexible plunger assembly being arranged to reciprocate together between the upper and lower pump cylinders, the lower end of the flexible plunger assembly being connected to a forced mechanical valve group, the lower end of the lower pump cylinder being connected to a bottom pump cylinder, and the oil inlet of the forced mechanical valve group being fixedly connected to a plunger tube that is slidingly constrained in the bottom pump cylinder. The utility model solves the problems of the conventional oil pumping pump, i.e., the oil pumping pump is prone to gas locking during the up and down strokes, which results in a small oil output or even no oil output, seriously affecting the normal operation of the oil well, and the problems of the existing rod column, i.e., the friction between the thick oil and the oil pumping rod is large, the oil pumping rod is subjected to a large force, and the risk of the oil pumping rod being broken off is increased.

The self-adaptive double-oil-way parallel shock absorber comprises an oil storage cylinder, a working cylinder arranged in the oil storage cylinder and a piston assembly arranged in the working cylinder in a sliding mode, and a cavity in the working cylinder is divided into a rod cavity and a rodless cavity through the piston assembly; one side outside the oil storage cylinder is connected with a middle cylinder, a first chamber and a second chamber are arranged in the middle cylinder, the first chamber is communicated with the rodless cavity, and the second chamber is communicated with the rod cavity; two one-way mechanical valves are arranged at the middle cylinder; an electromagnetic valve assembly is further arranged at the middle cylinder, and the electromagnetic valve assembly is used for controlling whether the first cavity and the second cavity are communicated or not; when oil flows into the second cavity from the first cavity in a one-way mode or flows into the first cavity from the second cavity in a one-way mode, the action of the electromagnetic valve assembly is superior to that of a one-way mechanical valve at the moment, active and rapid switching between the communication state and the blocking state between the first cavity and the second cavity is achieved, and therefore the purpose of action decoupling of the one-way mechanical valve and the electromagnetic valve assembly is achieved. And the dynamic responsiveness and accuracy of damping regulation and control are improved.

The invention relates to the technical field of powder material packaging, and particularly discloses a pneumatic-based powder packaging system and method. The system comprises a gas screen control module, a separation and purification module and a pressure regulation module. The air screen control module generates and generates an air curtain barrier with adjustable strength through an air screen device, and the controller dynamically adjusts the sealing strength according to an instruction; the separation and purification module realizes powder recovery and gas purification; the pressure adjusting module maintains system pressure balance. The system automatically switches operation modes according to the packaging stage: in the container positioning stage, the air curtain barrier prevents the powder from passing through, and the separation device recovers the powder in the airflow; and in the quantitative filling stage, the system maintains positive pressure, so that the powder smoothly passes through and dust is prevented from escaping. Non-contact type dynamic sealing replaces a mechanical valve, the problems of dust leakage, cross contamination, frequent maintenance and the like are solved, and the non-contact type dynamic sealing powder packaging machine is suitable for powder packaging scenes with high cleanliness requirements such as food, medicine and chemical engineering.

The invention discloses a handheld multifunctional adjustable suction pen jig which comprises a main body supporting frame. The bracket is fixedly arranged at the top end of the main body support frame; the handheld grip is fixedly arranged on the inner side of the bracket; the vacuum generator is fixedly arranged on one side of the inner cavity of the handheld grip; the mechanical valve is fixedly arranged on the other side of the inner cavity of the handheld grip, and the front side of the mechanical valve extends out of the front side of the handheld grip. According to the handheld multifunctional adjustable suction pen jig, by arranging the adjustable suction fixing assembly, the positions of the multiple suction nozzles can be independently adjusted and fixed so that the jig can be suitable for sucking and fixing materials of different sizes, and the jig is connected with a first air pipe connector, an air distribution pipe connector and a second air pipe connector through air pipes; and the vacuum generator can generate suction force to the suction nozzle under the cooperation of the suction mechanism, so that light and thin materials in various forms can be sucked and moved.

The present application relates to a kind of water delivery cleaning techniques, specifically a kind of disc filter according to pressure difference to mechanical control of backwashing, including shell structure, filter core component and mechanical valve control mechanism, the inside hollow of shell structure, the lower portion of shell structure has water supply and drainage pipe group, water supply and drainage pipe group from the lower portion of shell structure into shell structure;Upper and lower parts of shell structure have drainage passage and blowdown passage respectively;Filter core component is set in shell structure, and mechanical valve control mechanism is used to open and close control of drainage passage and blowdown passage.Adopt mechanical valve control mechanism to automatically control the opening and closing of blowdown passage and drainage passage, replace original solenoid valve, on the one hand, in durability aspect can be guaranteed, on the other hand, in precision control aspect is also more accurate;And using mechanical structure control replaces solenoid valve, in manufacturing cost and maintenance cost are superior;Mechanical structure can adapt to complex water environment, and failure rate is lower compared to solenoid valve.

The application discloses a low-noise pneumatic air gun type biopsy needle convenient for single-hand loading, which comprises an inner needle, an outer needle, a connector, a mechanical valve, a firing mechanism, a loading mechanism, a needle cylinder, a needle cylinder shell, a first piston, a tension spring, a second piston and a compression spring. The inner needle is glued on the outer side of the front end of the needle cylinder, the outer needle is glued on one end of the connector and is sleeved on the outer side of the inner needle, and the other end of the connector is fixed with the elongated part of the second piston. The needle cylinder comprises a needle cylinder part one and a needle cylinder part two, and the needle cylinder and the needle cylinder shell are bonded into an integrated whole after being aligned. The second piston is fixedly connected with the compression spring and is located on the inner side of the front end of the needle cylinder, and the other end of the compression spring is sleeved on the protruding part on the inner side of the front end of the needle cylinder. The first piston is fixedly connected with the tension spring and is located on the inner side of the tail end of the needle cylinder, and the other end of the tension spring is bonded with the tail seat of the needle cylinder. The firing mechanism realizes button control of cutting and sampling of the outer needle. The loading mechanism realizes button control of returning and loading of the outer needle. The application reduces the dependence of surgical operation on the experience of doctors, reduces the noise generated in the surgical process, avoids the body displacement of patients due to the noise, improves the precision of tissue biopsy surgery, can realize single-hand operation and improves the convenience of surgical operation.

The utility model discloses a novel sealing device for titanium alloy powder oxygen content detection, which comprises a support frame and a vacuum chamber, one side of the bottom of the support frame is provided with a first motor, one side of the first motor is provided with a rotary granulation mechanism, one side of the rotary granulation mechanism is provided with a three-way pipe, one side of the three-way pipe is provided with a titaniferous solution atomizing mechanism, and the other side of the three-way pipe is provided with a second motor. A vacuum chamber is arranged above the titaniferous solution atomizing mechanism, a heating coil is arranged on the lower side of the inner wall of the vacuum chamber, a heat conducting plate is arranged above the heating coil, a stirring mechanism is arranged at the center of the top of the heat conducting plate, a second vacuum pump is arranged on one side of the stirring mechanism, and a feeding pipe is arranged on the other side of the stirring mechanism; a mechanical valve is arranged on one side of the feeding pipe, a large amount of air is prevented from entering the vacuum chamber while a titanium rod is placed in the vacuum chamber through the double-layer sealed feeding port structure, the purity of the titanium rod material inside the vacuum chamber is guaranteed, and the production precision of products is improved.

The utility model discloses an electrolytic cell of built -in mechanical type automatic valve, and the inside of open end plate forms the horizontal passage of horizontal distribution, is provided with to the both ends of horizontal passage through open end plate, and one end of horizontal passage is purging gas import, and the other end of horizontal passage is hydrogen export, and the both sides of open end plate still respectively downwards have opened first longitudinal channel and second longitudinal channel, and open end plate is close to the central position longitudinal distribution and has the pilot pressure channel, and the pilot pressure channel is through open end plate distribution up and down, and the one end of horizontal passage close to purging gas import is equipped with check valve, and the pilot pressure channel is equipped with the on -off valve. Advantageous effects are: realize the hydrogen gas that electrolytic cell works produces from the both ends of electrolytic chamber and flows out simultaneously, realize the purging when electrolytic cell stops, and purging gas flows into from one end of electrolytic chamber, and flows out from the other end, and the switching of two kinds of modes is automatic, and does not depend on electrical control equipment, realizes by mechanical valve, and the reliability is high, and simple to use.

The water drinking equipment comprises a shell assembly and a water way assembly arranged in the shell assembly, the valve assembly comprises at least two mechanical valves and a valve support, the valve support is used for being connected to the shell assembly and comprises a first installation part and a second installation part which are connected, and all the mechanical valves are installed on the first installation part; the second mounting part is provided with a water passing pipe, a water inlet and a water outlet, wherein the water inlet and the water outlet are communicated with the water passing pipe. According to the technical scheme, a plurality of mechanical valves can be integrated, subsequent modular assembly is achieved, the assembly efficiency is improved, meanwhile, the waterway setting design is combined, the assembly requirement of subsequent extra waterway components is reduced, and the installation difficulty is reduced.

The mechanical valve comprises a valve body, a first sealing ring, a valve rod, a pressing assembly and a spring, the valve body is provided with a communicating opening communicating a water inlet cavity with a water outlet cavity, and the valve body comprises a mounting part located in the water inlet cavity. The first sealing ring is connected to the mounting part and surrounds the communicating port; the part, located in the water inlet cavity, of the valve rod is provided with a sealing face facing the first sealing ring. The pressing assembly drives the valve rod to move in the axial direction of the pressing assembly and is switched into a first state or a second state. The spring is arranged in the water inlet cavity, the two ends of the spring abut against the valve rod and the cavity wall of the water inlet cavity correspondingly, and thrust acting on the valve rod and facing the pressing assembly in the axial direction of the valve rod is provided. According to the technical scheme, water flow can be effectively controlled, meanwhile, the structure of the mechanical valve is simplified, and operation convenience is improved.

The invention discloses a portable respiratory training device capable of monitoring the lung function, and relates to the technical field of medical rehabilitation instruments, in particular to the portable respiratory training device capable of monitoring the lung function, which comprises a shell, an air blowing port is formed in the front end of the shell, an expiration and inspiration selection valve is arranged at the upper end of the shell, and a display screen and function buttons are arranged at the side end of the shell; the lower end is provided with a data export interface, and the rear end is provided with an air hole. An airflow channel is arranged in the shell, and an airflow sensor, a one-way valve set controlled by a selector valve and a piston type air cylinder mechanism are sequentially arranged in the channel. The piston displacement sensor is used for detecting piston displacement. And a main control circuit board and a rechargeable battery are also arranged in the shell. The airflow sensor and the piston displacement sensor transmit signals to the master control circuit board for processing, and finally data are displayed through the display screen. The breathing mode is switched through the mechanical valve, the double sensors are used for accurately monitoring airflow parameters and vital capacity, the structure is compact, and a user can conveniently carry out portable lung function training and monitoring.

The application provides a track type three-leaflet mechanical valve. The track type three-leaflet mechanical valve comprises a ring-shaped support and valve leaves, the ring-shaped support is a hollow columnar structure, the valve leaves comprise trailing edges and leading edges connected to the ring-shaped support; the valve leaves are three, the three valve leaves are sequentially and spacedly arranged along the circumference on the inner wall of the ring-shaped support, the inner wall of the ring-shaped support is provided with movement tracks matched with the valve leaves, the movement tracks accommodate and receive the leading edges of the valve leaves; the inner wall of the ring-shaped support is provided with a partition body between adjacent valve leaves, the partition body separates the valve leaves and supports the end portions of the valve leaves. The application optimizes the structure, improves the fluid dynamics performance, reduces the interference to blood flow, optimizes the blood flow performance, enhances self-cleaning, and reduces the thrombosis risk.

The present application relates to the technical field of cocktail mixing machine, and particularly relates to a stirring mechanism of a cocktail mixing machine. The stirring mechanism comprises: a stirring cup with an open top, a mounting box at the bottom of the stirring cup, wherein the bottom of the stirring cup is provided with a stirring paddle, the mounting box is provided with a driving device for driving the stirring paddle, the side of the bottom of the stirring cup away from the stirring paddle is provided with a discharging channel, and the discharging channel is communicated with a wine outlet pipeline arranged in the mounting box. The stirring mechanism further comprises: a mechanical valve assembly for opening or closing the discharging channel. When the operating rod is rotated under external force, the operating rod is pushed to move upward along the axial direction of the transmission rod, the transmission rod drives the first sealing plug to move away from the entrance of the discharging channel, so that the liquid in the stirring cup enters the wine outlet pipeline through the discharging channel. When the external force is removed, the transmission rod moves downward along the axial direction under the action of the elastic reset member, and drives the first sealing plug to close the entrance of the discharging channel.

1. The name of the design product: filling machine (mechanical valve). 2. The use of the design product: for mechanical valve gravity filling of low viscosity materials such as water. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a mechanical valve capable of preventing liquid leakage, which relates to the technical field of mechanical valves and comprises a valve body and a handle, a fixed lighting mechanism is arranged on the outer wall of the valve body and comprises a first fixed block, and the outer wall of the valve body is fixedly connected with the first fixed block and a second fixed block respectively. According to the utility model, the fixed lighting mechanism is arranged, so that the effects of fixing the state of the valve and conveniently lighting the valve can be achieved, and in the use process, the valve is fixed through the matching of the threaded rod and the threaded hole, and the lighting lamp is started to light the valve, so that the use is convenient. By means of the technical scheme, the situations that due to the fact that the state of the valve cannot be fixed, when the valve works, the valve is opened or closed due to malicious rotation of personnel, if the valve is closed during working, work is interrupted, great inconvenience is caused, and if the valve is opened when not used, liquid losses are caused, and resources are wasted can be avoided. And the practicability of the valve is ensured.

The utility model belongs to the technical field of component verification, and particularly relates to an air pressure type three-way solenoid valve verification system, which comprises an air pressure pump with pressure display and an adjustable power supply device, and is characterized in that the air pressure pump with pressure display is respectively connected with an air inlet I of a solenoid valve to be verified and an air inlet II of the solenoid valve to be verified through pipelines; an air outlet of the to-be-detected electromagnetic valve is respectively connected with an air inlet of the pressure transmitter with the display screen and an air inlet of the air storage tank through pipelines; the change-over switch is used for checking the voltage operating values of coil operation and resetting on the two sides of the to-be-detected electromagnetic valve respectively, and the minimum air source pressure operating value of the to-be-detected electromagnetic valve can be measured, so that the defect that the coil operating voltage of the air pressure type electromagnetic valve and the minimum air source pressure of electromagnetic valve operation cannot be accurately measured in the prior art is overcome; meanwhile, whether the valve element acts in place or not can be judged by respectively closing the second mechanical valve and the third mechanical valve and displaying through a pressure transmitter with a display screen.

The application relates to the dust collecting and storing technical field and discloses a negative pressure powder collecting device with a storing function, which comprises a feeding pipe, a mechanical valve is fixedly installed on the outer surface of the feeding pipe, and a feeding cylinder is fixedly communicated with the bottom end of the feeding pipe. The negative pressure powder collecting device with the storing function is provided with components such as the mechanical valve, the storing cylinder and the pneumatic valve, the mechanical valve is always opened during production, the pneumatic valve is opened during powder collecting, powder flows into a PE bag through a discharging pipe, the pneumatic valve is closed when the PE bag needs to be replaced, the powder stays in the storing cylinder, the storing cylinder has a certain depth, the probability of negative pressure extraction of the powder is reduced, the pneumatic valve is opened after the PE bag is replaced, the temporarily stored powder falls into a new PE bag, the mechanical valve and the pneumatic valve are closed after production, the dry paste powder can be effectively collected and stored in the storing cylinder, non-stop continuous operation is realized, the operation convenience is improved, and the system leakage is reduced due to the double valve sealing.

Instrument for performing a diagnostic test on a fluidic cartridge A cartridge reader is for carrying out a diagnostic test on a sample contained in a fluidic cartridge inserted into the reader. The fluidic cartridge comprises a fluidic layer comprising at least one sample processing region, at least one collapsible blister containing a liquid reagent, a pneumatic interface, an electrical interface and at least one mechanical valve. The reader comprises a housing; an upper clamp occupying a fixed position relative to the reader, and a lower clamp, movable relative to the first clamp, wherein the upper clamp and the lower clamp define a cartridge receiving region therebetween. The reader comprises a thermal module comprised in the lower clamp, wherein the thermal module comprises at least one thermal stack for heating the at least one sample processing region of the cartridge inserted into the reader. The reader comprises at least one mechanical actuator for actuating the mechanical valve comprised in the cartridge inserted into the reader.

The application provides a petroleum mechanical valve with an emergency blocking function, and relates to the technical field of valves.The petroleum mechanical valve with the emergency blocking function comprises a valve body, a valve plate, a lifting mechanism and an elastic member.The middle part of the valve body is provided with a cutting groove.The valve plate is slidingly installed in the cutting groove and is used for controlling the communication between the two ends of the valve body.A sliding groove is formed in the valve plate, and the lifting end of the lifting mechanism can slide in the sliding groove, so that the lifting end of the lifting mechanism can make the valve plate lift or drop by abutting against the two ends of the sliding groove.The elastic member is used for applying a downward force to the valve plate.A limiting mechanism is used for clamping the valve plate after the valve plate is lifted to a certain position, so that the valve plate is prevented from continuously moving.When an emergency occurs, the limiting mechanism is opened, the valve plate is completely entered into the cutting groove under the action of the compression spring, and the communication between the two ends of the valve body is cut off.

The utility model relates to the technical field of valve opening and closing, and discloses a mechanical valve opening and closing device which comprises a floating device and a tubular structure, the floating device comprises a floating ball, a guide rod, an upper push rod, a lower pull rod and a limiting guide, one end of the tubular structure is connected with an annular structure, and the annular structure is located between the upper push rod and the lower pull rod. The other end of the tubular structure is linked with a valve on the water outlet pipe through a gear assembly, and the middle of the tubular structure is fixed to the bearing and rotates around the bearing. When the device is used, the valve on the water outlet pipe is instantly opened and closed through vertical displacement of the floating device, and the situation of repeated opening and closing cannot occur when the valve is closed in the using process. According to the device, the upper push rod and the lower pull rod on the guide rod push and pull the annular structure up and down through up-down floating of the floating ball, so that rotation of the tubular structure is controlled, and the device is operated through linkage of all parts and is more convenient to use. The tubular structure of the device is driven by the floating device to rotate around the bearing, the gear assembly is shifted by the shifting rod for linkage, and the device is stable in structure and good in practicability.

The utility model discloses a full-bore forge piece ball valve resistant to high pressure and low temperature, and relates to the technical field of mechanical valves. The full-bore forge piece ball valve comprises a pipe shell, the inner wall of the pipe shell is rotationally connected with a ball valve body, the outer wall of the pipe shell is fixedly connected with a locking assembly, and the inner wall of the pipe shell is fixedly connected with a buffering assembly; impurities in water flow can be preliminarily filtered through filter holes in a buffer plate, the impurities are prevented from entering a ball valve body, abrasion of the impurities to a ball valve sealing face, a rotating component and the like is reduced, the probability that the ball valve breaks down due to the impurities is reduced, and when the water pressure is too large, the buffer plate slides under guiding of a limiting block and extrudes a second spring, so that the water pressure is reduced. The elastic deformation of the second spring can buffer the impact force of water flow and reduce the direct action of high-pressure water flow on the ball valve body, so that the normal operation of the ball valve is guaranteed from multiple aspects, and the service life of the ball valve is prolonged.

This invention discloses a fatigue-resistant MEMS microvalve based on discrete pulse drive, belonging to the field of microelectromechanical systems (MEMS) technology. The microvalve includes a microchannel, a bistable mechanical valve core, and a discrete pulse drive unit. The bistable mechanical valve core has only two stable mechanical positions: fully open and fully closed. The discrete pulse drive unit receives a single discrete voltage pulse to drive the valve core to complete the state switching. This invention has zero power consumption when there is no pulse input. The valve core relies on its physical structure for self-locking, eliminating continuous stress and static power consumption, significantly improving fatigue life. It is suitable for aerospace engines, medical microfluidics, and industrial pneumatic systems.

The utility model belongs to the field of electromagnetic valves, and particularly relates to a quick response electromagnetic valve which comprises an electromagnetic valve body and a mechanical valve body which are communicated with each other. The electromagnetic valve is characterized in that one side of the electromagnetic valve body is communicated with a filter; one side of the filter is communicated with external compressed gas supply equipment; a cover plate for opening and closing is arranged at the top of the filter; a plurality of mounting grooves are fixedly connected to the inner wall of the filter; a filter plate is arranged in the mounting groove; an electromagnetic valve coil is mounted at the top of the electromagnetic valve body through a bolt; through the arrangement of the filter and the filter plate, the filter plate can remove particle impurities carried in compressed airflow, so that the situation that movement of moving parts in the electromagnetic valve body and the mechanical valve body is blocked or abraded due to friction of the particle impurities is reduced, and the electromagnetic valve body and the mechanical valve body can keep normal opening and closing speeds; and it is ensured that the electromagnetic valve body and the mechanical valve body can quickly respond to input signals.

The invention discloses an artificial heart valve and a preparation method thereof. A valve leaflet material of the valve is a PLCL nanofiber membrane with an I-type collagen coating on the surface. The artificial heart valve not only has good biocompatibility and hemodynamic performance of a biological valve and does not cause acute blood coagulation, but also has good mechanical performance and anti-calcification performance of a mechanical valve, ensures smooth one-way flow of blood, is not easy to calcify, and is relatively long in service life. The mechanical property and the biocompatibility of the artificial heart valve have high adjustability, and particularly, the mechanical property and the biocompatibility are adjusted by controlling the monomer composition of the PLCL nanofiber membrane material and the thickness of the coating, so that the mechanical property and the biological characteristic which are similar to those of a native heart valve are achieved. In addition, the artificial heart valve is of an integrally-formed single-piece structure, the valve leaflets do not need to be sewn, and the machining cost is low.

The present application relates to oxygen valve technical field, the present application discloses a three mouth valve, including the connecting stabilizing portion, the connecting stabilizing portion is successively provided with the air inlet and the stabilizing chamber along the direction of movement of the bottle gas, the lower portion of the connecting stabilizing portion is provided with a plurality of with the connecting stabilizing portion as center annular distribution's air supply unit, a plurality of air supply unit is fixedly connected, the air supply unit is provided with the gas distribution warehouse, the gas distribution warehouse is successively provided with the gas control workpiece, the piston sheet, the bottom air inlet assembly, the mechanical valve from top to bottom in;With double airway cooperation, gas passes through the lower top gas pipeline and enters the bottom air inlet assembly, two gas all comes from the stabilizing chamber, the upper and lower end of piston sheet is affected by the relative force of gas, and the mechanical valve is deformed, and the negative pressure demand of the mechanical valve is reduced.The mechanical valve deformation force of the technical scheme is greater, but the negative pressure demand of the deformation is small.

The utility model discloses a mechanical valve, which relates to the technical field of mechanical valves and comprises a valve body, protective components arranged at two ends of the valve body, a buffer component arranged at one end in the valve body, an anti-backflow component arranged at the other end in the valve body, a valve core arranged in the middle of the valve body, and flanges I fixedly mounted at two end parts of the valve body, a sleeve is arranged in the middle of the valve body, a threaded sleeve is arranged above the sleeve and connected with the sleeve through a second flange, the diameter of the threaded sleeve is smaller than that of the sleeve, threads of the threaded sleeve are connected with a valve rod, the lower end of the valve rod penetrates through the sleeve and can move along the sleeve, the lower end of the valve rod is fixedly connected with a valve element, and the valve element can move into the sleeve. The backflow prevention mechanism is arranged in the valve body, so that the phenomenon of liquid backflow caused by abrasion of the valve element can be effectively prevented; and liquid or gas can be buffered through the buffer rod, damage to the valve body is avoided, and therefore the use efficiency and practicability of the mechanical valve are improved.