A self-draining vacuum gas-liquid separator

Abstract

The present invention relates to the field of gas-liquid separation technology, and in particular to a self-draining vacuum gas-liquid separator. A centrifugal structure is provided within the filter cup, comprising a guide disc. The guide disc is provided with a plurality of guide channels evenly distributed along the circumference of the guide disc. This allows the exhaust gas to enter through the air inlet and rotate through the guide channels on the guide disc, generating centrifugal force that causes the denser electrolyte in the exhaust gas to be ejected. The electrolyte flows downward along the inner wall of the filter cup, while the gas in the exhaust gas enters the interior of the filter element through the filter holes on the filter element and is then discharged through the air outlet. The two separation structures of the centrifugal structure and the filter element can enhance the gas-liquid separation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-liquid separation, in particular to a self-draining vacuum gas-liquid separator. Background Art

[0002] The lithium battery industry's current formation process produces waste gas containing electrolyte, requiring a gas-liquid separator to recover the electrolyte. However, existing vacuum gas-liquid separation equipment uses only a single filter element, resulting in incomplete filtration. This can also cause the bottom valve to remain open due to prolonged immersion in electrolyte. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a self-draining vacuum gas-liquid separator that can improve the gas-liquid separation effect.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A self-draining vacuum air-liquid separator, comprising a filter cup and a liquid storage cup, wherein the filter cup is arranged above the liquid storage cup and is connected to the liquid storage cup, an air inlet and an air outlet are provided at the upper end of the filter cup, a filter element is provided in the filter cup, and a centrifugal structure is also provided in the filter cup, wherein the centrifugal structure comprises a guide plate, and a plurality of guide channels are provided on the guide plate and are evenly distributed along the circumference of the guide plate, one end of the guide channel is connected to the air inlet, the other end of the guide channel is connected to the outside of the filter element, and the inside of the filter element is connected to the air outlet.

[0006] The beneficial effects of the present invention are:

[0007] The present invention provides a self-draining vacuum gas-liquid separator, which has a centrifugal structure within a filter cup. The centrifugal structure includes a guide plate with multiple guide channels evenly distributed along its circumference. After exhaust gas enters through the air inlet, it rotates through the guide channels on the guide plate, generating centrifugal force that ejects the denser electrolyte in the exhaust gas. The electrolyte flows downward along the inner wall of the filter cup, while the gas in the exhaust gas enters the filter element through the filter holes on the filter element and is then discharged through the air outlet. The dual separation structure of the centrifugal structure and the filter element can enhance the gas-liquid separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Schematic diagram of the structure of the self-draining vacuum gas-liquid separator of the present invention;

[0009] Figure 2 It is a front view of the self-draining vacuum gas-liquid separator of the present invention;

[0010] Figure 3 A cross-sectional view of the self-draining vacuum gas-liquid separator at AA of the present invention;

[0011] Figure 4 This is an exploded view of the structure of the self-draining vacuum gas-liquid separator of the present invention;

[0012] Figure 5 This is an exploded view of the structure of the air-controlled diaphragm valve of the present invention;

[0013] Figure 6 is a cross-sectional view of the air-controlled diaphragm valve of the present invention;

[0014] Figure 7 It is a side view of the air-controlled diaphragm valve of the present invention;

[0015] Figure 8 A bottom view of the air-controlled diaphragm valve of the present invention;

[0016] Figure 9 This is a partial structural exploded view of the air-controlled diaphragm valve of the present invention;

[0017] Figure 10 for Figure 6 Enlarged view of point B in the middle;

[0018] Figure 11 It is a structural schematic diagram of the diaphragm body of the air-controlled diaphragm valve of the present invention;

[0019] Figure 12 is a cross-sectional view of the diaphragm body of the air-controlled diaphragm valve of the present invention;

[0020] Figure 13 for Figure 12 Enlarged view of point A in the middle;

[0021] Figure 14 It is a structural schematic diagram of the air-controlled diaphragm valve of the present invention;

[0022] Figure 15 It is a side view of the air-controlled diaphragm valve of the present invention;

[0023] Figure 16 for Figure 15 Cross-sectional view at AA in the middle;

[0024] Figure 17 for Figure 14 The structural exploded diagram of the air-operated diaphragm valve;

[0025] Description of labels:

[0026] 1. Valve body; 11. Valve port; 111. Annular groove; 12. Flow guide surface; 13. Liquid outlet;

[0027] 2. Pneumatic control cavity;

[0028] 21. Valve core; 211. Diaphragm body; 212. Sealing body; 2121. Enclosed cavity; 2122. Metal pressing piece; 2123. First through hole; 2124. Second through hole; 2125. Third through hole; 2126. Second annular groove; 2127. Sealing ring; 2128. Protrusion;

[0029] 213. Deformation portion; 214. Flange; 215. Annular protrusion; 216. Second leather cup; 217. Spring;

[0030] 22. groove; 221. sliding bearing; 222. baffle; 223. reduced diameter edge;

[0031] 23. End cap;

[0032] 24. Valve core front guide block; 241. Pressure relief port; 242. Inner annular groove; 243. First leather cup; 244. Outer annular groove; 245. O-ring; 246. Annular edge; 247. Air control port;

[0033] 25. Diaphragm fixing screw; 26. Magnetic ring; 27. Washer; 28. Magnetic switch; 29. Strip groove;

[0034] 3. Shrinkage space;

[0035] 4. Filter cup; 41. Air inlet; 42. Air outlet; 43. Filter element; 44. Connecting port;

[0036] 5. Liquid storage cup; 51. Vacuum breaker;

[0037] 6. Cylinder; 61. Long rod; 62. Sealing body;

[0038] 7. guide plate; 71. guide channel; 72. umbrella-shaped member;

[0039] 8. Movable joint;

[0040] 91. Valve body; 92. Diaphragm cover; 93. Rubber diaphragm; 94. Cylinder. DETAILED DESCRIPTION

[0041] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0042] Please refer to Figures 1-17, the present invention provides a self-draining vacuum air-liquid separator, comprising a filter cup and a liquid storage cup, the filter cup being arranged above the liquid storage cup and being connected to the liquid storage cup, the upper end of the filter cup being provided with an air inlet and an air outlet, the filter cup being provided with a filter element, the filter cup being further provided with a centrifugal structure, the centrifugal structure comprising a guide plate, the guide plate being provided with a plurality of guide channels evenly distributed along the circumference of the guide plate, one end of the guide channel being connected to the air inlet, the other end of the guide channel being connected to the outside of the filter element, and the inside of the filter element being connected to the air outlet.

[0043] From the above description, it can be seen that the beneficial effects of the present invention are:

[0044] The present invention provides a self-draining vacuum gas-liquid separator, which has a centrifugal structure within a filter cup. The centrifugal structure includes a guide plate with multiple guide channels evenly distributed along its circumference. After exhaust gas enters through the air inlet, it rotates through the guide channels on the guide plate, generating centrifugal force that ejects the denser electrolyte in the exhaust gas. The electrolyte flows downward along the inner wall of the filter cup, while the gas in the exhaust gas enters the filter element through the filter holes on the filter element and is then discharged through the air outlet. The dual separation structure of the centrifugal structure and the filter element can enhance the gas-liquid separation effect.

[0045] Furthermore, an umbrella-shaped piece is provided at the other end of the diversion channel and the umbrella-shaped piece is sleeved on the upper part of the filter element.

[0046] As can be seen from the above description, the umbrella-shaped member is trumpet-shaped, and the exhaust gas passing through the guide channel is further centrifuged under the action of the umbrella-shaped member, thereby achieving better gas-liquid separation.

[0047] Furthermore, a cylinder is provided on the outside of the upper end of the filter cup, and a coaxially arranged long rod is provided on the output shaft of the cylinder. The long rod is located in the filter cup and penetrates from one end of the filter element to the other end of the filter element along the axial direction of the filter element. The end of the long rod passing through the other end of the filter element is provided with a sealing body, and the lower end of the filter cup is provided with a connecting port connected to the liquid storage cup, and the sealing body is adapted to the connecting port.

[0048] As can be seen from the above description, through the above structural design, the sealing body on the long rod can be driven by the cylinder to cooperate with the connecting port to realize the opening and closing functions of the connecting port, that is, to realize the independence between the filter cup and the liquid storage cup. The existing filter cup and the liquid storage cup are controlled by a manual ball valve. Since it takes a long time to open and close once in the working conditions, the manual ball valve requires a lot of force to open; the bottom valve body on the control is the movement form of a ball valve, combined with the working conditions where the on-site liquid is an electrolyte, it will become unstable when opened and closed after long-term use. The use of this solution can improve this problem. In addition, the above structure can realize the liquid extraction operation during the gas-liquid separation process, that is, the two can be carried out simultaneously without affecting each other.

[0049] Furthermore, the sealing body is a rubber cone plug.

[0050] From the above description, it can be seen that the rubber cone plug is made of EPDM, which is corrosion-resistant and has a certain elasticity, and can fit tightly with the connecting port which is also conical.

[0051] Furthermore, a vacuum breaking port is provided at the upper portion of the liquid storage cup, a liquid discharge port is provided at the lower portion of the liquid storage cup, an air-controlled diaphragm valve is provided at the liquid discharge port, and the filter cup is detachably connected to the liquid storage cup.

[0052] It can be seen from the above description that, through the above structural design, the liquid extraction operation can be realized during the gas-liquid separation process, that is, the two can be carried out simultaneously without affecting each other.

[0053] Furthermore, the lower side wall surface of the filter cup is provided with an external thread, and the upper side wall surface of the liquid storage cup is provided with an internal thread matching the external thread.

[0054] As can be seen from the above description, the above structural design enables the filter cup and the liquid storage cup to be detachably connected, and the detachment and assembly are convenient.

[0055] Furthermore, the lower part of the liquid storage cup is connected to a movable joint, the air-controlled diaphragm valve is arranged in the middle part of the movable joint, and the liquid discharge port is located at the lower part of the movable joint.

[0056] It can be seen from the above description that, through the above structural design, the movable joint is used to control the axial angle between the diaphragm valve body of the air-controlled diaphragm valve and the liquid storage cup.

[0057] Furthermore, the pneumatically controlled diaphragm valve includes a valve body with openings at both ends and a pneumatic control cavity with an opening at one end; a valve port is provided in the middle of the valve body, and the open end of the pneumatic control cavity is connected to the valve port to form a T-shaped structure; the caliber range of the opening of the valve body is 6mm-25mm, and a guide surface and a liquid outlet hole provided on the guide surface are provided in the middle of the valve body, the axial direction of the liquid outlet hole is perpendicular to the axial direction of the valve body, the valve port is arranged corresponding to the position of the liquid outlet hole, and the valve port and the liquid outlet hole are arranged coaxially, and the diameter range of the liquid outlet hole is 6mm-20mm;

[0058] A valve core is coaxially arranged and axially slidable in the pneumatic control cavity. The middle part of the valve core abuts against the inner wall of the pneumatic control cavity. A flexible diaphragm body is provided on the end of the valve core facing the valve port. The diaphragm body includes a sealing body located in the center, a deformation part connected to the outer edge of the sealing body, and a flange connected to the outer edge of the deformation part. A constricted space for accommodating the flange is formed between the valve port of the valve body and the open end face of the pneumatic control cavity. A groove is provided on the inner side face of the other end of the pneumatic control cavity opposite to the opening at one end thereof, and a sliding bearing is embedded in the inner side wall of the groove. The end of the valve core away from the valve port extends into the groove and cooperates with the sliding bearing.

[0059] From the above description, it can be seen that through the above structural design, a large-diameter valve body is adopted, which is increased from the traditional 5mm to 6mm-25mm, and the large diameter of the liquid outlet is increased from the traditional 5mm to 6mm-20mm, so as to meet the influence of the large tension of the electrolyte with high viscosity on the flow of the electrolyte; and a guide surface and a liquid outlet provided on the guide surface are provided in the middle part of the valve body, the axial direction of the liquid outlet is perpendicular to the axial direction of the valve body, and the guide surface is designed to be a guide slope structure to facilitate the outflow of the electrolyte; the liquid outlet cooperates with the valve core in the external pneumatic control cavity, and the valve core is used to control the opening and closing of the liquid outlet, and the valve mouth is close to the liquid outlet to shorten the distance of the liquid flow as much as possible, and change its flow direction to prevent electrolyte accumulation and crystallization, and the resulting blockage. phenomenon, and is conducive to the precise control of the quantitative injection of electrolyte; secondly, the large diameter will increase the hydraulic pressure inside the entire control valve, and put forward higher requirements on the air tightness of the diaphragm body. By optimizing the specific structure of the diaphragm body, including a sealing body located in the center, a deformation part connected to the outer edge of the sealing body and a flange connected to the outer edge of the deformation part, and a shrinkage space for accommodating the flange formed between the valve port of the valve body and the open end face of the pneumatic control cavity, when the valve core drives the diaphragm to move back and forth during the action of the valve core, the sealing body of the diaphragm body moves, the deformation part deforms accordingly, and the flange is always confined in the shrinkage space, that is, the edge of the diaphragm and the inner wall of the pneumatic control cavity will not rub against each other, thereby ensuring its sealing requirements and ensuring the gas-liquid separation effect. A groove is designed on the inner side surface of the other end of the pneumatic control cavity opposite to the opening at one end thereof, and a sliding bearing is embedded in the inner wall of the groove. One end of the valve core extends into the groove and cooperates with the sliding bearing. During the axial movement of the valve core in the pneumatic control cavity, one end of the valve core remains in cooperation with the sliding bearing, thereby limiting the deviation of one end of the valve core, thereby further reducing the friction between the valve core and the pneumatic control cavity, reducing losses, and improving the concentricity and sealing of the valve core movement.

[0060] Furthermore, a valve core front guide block is provided on the valve core and the valve core front guide block is located between the diaphragm body and the middle part of the valve core, an air control port is provided on the side wall of the pneumatic control cavity and the air control port is located between the valve core front guide block and the middle part of the valve core, and a pressure relief port is provided on the valve core front guide block, and the pressure relief port enables the space between the diaphragm body and the valve core front guide block to communicate with the outside of the pneumatic control cavity.

[0061] From the above description, it can be seen that by providing a pressure relief port on the front guide block of the valve core located between the diaphragm body and the middle part of the valve core, and the pressure relief port makes the space between the diaphragm body and the front guide block of the valve core connected with the outside of the pneumatic control cavity, the back pressure generated between the diaphragm body and the front guide block of the valve core after the valve core moves repeatedly can be avoided, thereby ensuring the air tightness of the valve core.

[0062] Furthermore, the edge of one end face of the front guide block of the valve core facing the valve port has an annular edge extending toward the valve port, and a first annular groove is provided around the valve port of the valve body. There is a distance between the end face of the annular edge and the first annular groove and they together form the necking space.

[0063] As can be seen from the above description, through the above structural design, during assembly, there is a distance between the end face of the annular edge of the front guide block of the valve core and the first annular groove located at the periphery of the valve port of the valve body, and they jointly form the shrinkage space.

[0064] Furthermore, the diameter of the opening is 14 mm, the diameter of the liquid outlet is 10 mm, and the angle formed between the guide surface and the axial direction of the valve body is 38°.

[0065] From the above description, it can be seen that the experimental results show that the opening diameter is 14mm and the diameter of the liquid outlet is 10mm, which increases the flow rate per area. The angle between the guide surface and the axial direction of the valve body is 38°, which is beneficial for guiding the flow and also for controlling the flow rate.

[0066] Furthermore, at least two inner annular grooves are provided on the inner side wall where the front guide block of the valve core contacts the valve core, and a first leather cup that abuts the valve core is embedded in each of the inner annular grooves; an annular protrusion is provided at the point where the middle part of the valve core abuts the inner side wall of the pneumatic control cavity, and a second leather cup is provided on the annular protrusion, and the outer side wall of the second leather cup abuts the inner side wall of the pneumatic control cavity.

[0067] As can be seen from the above description, the above structural design ensures the sealing between the front guide block of the valve core and the valve core, as well as the sealing between the middle of the valve core and the inner wall of the pneumatic control cavity.

[0068] Furthermore, a closed cavity is integrally formed at the center of the sealing body, and a metal pressing sheet is embedded in the closed cavity.

[0069] From the above description, it can be seen that the original assembly method of the metal pressing sheet has been changed, and the sealing body located at the center of the diaphragm body is integrally formed into a closed cavity. A metal pressing sheet is embedded inside the closed cavity, that is, the metal pressing sheet is completely wrapped in the closed cavity. No matter which direction the diaphragm moves, the metal pressing sheet and the closed cavity always remain tightly fitted together, and the structural strength of the middle part of the diaphragm is not affected by the movement of the valve core, which can improve the sealing of the diaphragm.

[0070] Furthermore, it also includes a diaphragm fixing screw; the two end surfaces of the sealing body corresponding to the closed cavity are provided with through holes, which are a first through hole and a second through hole respectively; the aperture of the first through hole is smaller than the aperture of the second through hole, and a third through hole is provided at the center position of the metal pressing plate, and the aperture of the third through hole is smaller than the aperture of the first through hole, and the first through hole, the third through hole and the second through hole are coaxially arranged, and one end of the diaphragm fixing screw passes through the first through hole, the third through hole and the second through hole in sequence and is fixedly connected to the mounting hole provided on one end of the valve core facing the valve port.

[0071] It can be seen from the above description that, through the above structural design, the diaphragm body is fixed to the valve core, so that the diaphragm body can move with the valve core.

[0072] Furthermore, a second annular groove surrounding the first through hole is provided on the end surface of the sealing body corresponding to the first through hole, and an annular flange is provided at the other end of the diaphragm fixing screw and the annular flange is embedded in the second annular groove.

[0073] From the above description, it can be seen that through the above structural design, the tightening end face of the diaphragm and the diaphragm fixing screw has a concave groove structure, and the corresponding tightening end face of the fixing screw has a flange structure. The diaphragm fixing screw passes through the center of the diaphragm, the diaphragm pressing piece, the spring washer and the middle hole of the valve core in sequence. At the same time, the flange structure of the tightening end face of the diaphragm fixing screw is embedded in the concave groove of the diaphragm. In addition to the sealing between the diaphragm and the diaphragm fixing screw, this structure can also prevent the diaphragm from falling off the tightening surface of the diaphragm fixing screw during the opening and closing process, causing non-sealing, thereby greatly improving the reliability and stability of the diaphragm operation.

[0074] Furthermore, a plurality of semicircular sealing rings are provided on the contact surface between the diaphragm and the other end of the diaphragm fixing screw.

[0075] As can be seen from the above description, the compression surfaces between the diaphragm and the diaphragm fixing screw are provided with multiple semicircular sealing rings to enhance the sealing performance therebetween.

[0076] Furthermore, a baffle is provided at the bottom of the groove, the groove width of the groove is adapted to the outer diameter of the sliding bearing, and a reduced diameter edge is provided at the notch of the groove, and the width of the reduced diameter edge is adapted to the inner diameter of the sliding bearing.

[0077] As can be seen from the above description, a baffle is provided at the bottom of the groove, providing a cushioning and protective effect for the end of the valve core. Through this structural design, the sliding bearing is embedded in the inner wall of the groove. The reduced diameter edge provided at the notch of the groove prevents the sliding bearing from dislodging. Furthermore, the width of the reduced diameter edge is greater than the inner diameter of the sliding bearing, which facilitates the end of the valve core to penetrate deeply into the sliding bearing when it is installed.

[0078] Furthermore, a magnetic ring is sleeved on the valve core, an annular protrusion is provided in the middle of the valve core, a gasket is sleeved on the valve core, and one side of the annular protrusion and the gasket are in contact with two side surfaces of the magnetic ring respectively to clamp the magnetic ring;

[0079] A magnetic switch is provided on the outer side wall of the pneumatic control cavity and the magnetic switch is arranged corresponding to the trigger position of the liquid injection control valve.

[0080] From the above description, it can be seen that through the above structural design, the gasket holds the valve core tightly under its elastic action, that is, the magnetic ring is fixed on the valve core by the joint clamping of the annular protrusion and the gasket, and moves with the valve core. There is no need to use glue, screws and other fastening methods, which facilitates quick assembly.

[0081] Furthermore, the outer side wall of the pneumatic control cavity is provided with a strip groove extending along its axial direction, and the width of the strip groove is adapted to the width of the magnetic switch; the magnetic switch is provided with an elastic member, and the elastic member abuts against the bottom of the strip groove.

[0082] As can be seen from the above description, through the above structural design, the magnetic switch can be installed at any position in the strip through-slot, achieving adjustable detection position. The elastic member abuts against the bottom of the strip through-slot, allowing the magnetic switch to be installed in the strip through-slot. Pressing the magnetic switch to compress the elastic member adjusts the position of the magnetic switch in the strip through-slot. Release the magnetic switch to elastically expand the elastic member, and the magnetic switch is firmly fixed in the strip through-slot.

[0083] Furthermore, there are two strip-shaped through grooves, and the two strip-shaped through grooves are arranged parallel to each other. The two magnetic switches are respectively located in the two strip-shaped through grooves and are respectively arranged to correspond to different trigger positions of the liquid injection control valve.

[0084] It can be seen from the above description that, through the above structural design, two magnetic switches can be provided to respectively detect two different trigger positions.

[0085] Furthermore, one end of the strip-shaped through groove in the axial direction is closed, and the other end is open, and the groove width of the strip-shaped through groove close to the open end is greater than the groove width of the strip-shaped through groove close to the closed end.

[0086] It can be seen from the above description that the above structural design facilitates the assembly of the magnetic switch.

[0087] Furthermore, it also includes a spring sleeved on the valve core, one end of the spring abuts against a side of the gasket away from the magnetic ring, and the other end of the spring abuts against the edge of the groove.

[0088] As can be seen from the above description, through the above structural design, when the valve core moves toward one side of the groove, the spring is compressed, so that it has a certain restoring force, which is conducive to resetting.

[0089] Furthermore, the air-controlled diaphragm valve includes a valve body with openings at both ends, a diaphragm cover, a diaphragm and a cylinder; a valve port is provided in the middle of the valve body, one end of the diaphragm cover is connected to the valve port, and the other end of the diaphragm cover is connected to the cylinder body of the cylinder, the diaphragm is located inside the diaphragm cover and is provided on the free end of the driving rod of the cylinder, and the diaphragm cooperates with the flow channel opening in the valve port.

[0090] It can be seen from the above description that, through the above structural design, the control of the liquid discharge port can be achieved with a relatively simple structure.

[0091] Please refer to Figures 1-17 , embodiment 1 of the present invention is:

[0092] The present invention provides a self-draining vacuum gas-liquid separator, comprising a filter cup 4, a liquid storage cup 5, and a cylinder 6. The filter cup 4 is disposed above the liquid storage cup 5 and is in communication with the liquid storage cup 5. In this embodiment, the inner cavities of the filter cup and the liquid storage cup are both cylindrical, and the filter cup and the liquid storage cup are coaxially arranged. An air inlet 41 and an air outlet 42 are respectively provided on opposite sides of the upper end of the filter cup 4, and the air inlet is in communication with an external exhaust pipe. The cylinder 6 is disposed outside the upper end of the filter cup, and a coaxially arranged long rod 61 is provided on the output shaft of the cylinder 6, that is, it is arranged vertically downward.

[0093] The filter cup 4 is provided with a filter element 43 and a centrifugal structure. The filter element and the filter cup are coaxially arranged. The long rod 61 is located within the filter cup and extends axially from one end of the filter element to the other end. The end of the long rod that passes through the other end of the filter element is sleeved with a sealing body 62. The lower end of the filter cup 4 is provided with a connecting port 44 that communicates with the liquid storage cup. The sealing body 62 is adapted to the connecting port 44. The sealing body is a rubber cone plug. The rubber cone plug is made of EPDM, which is corrosion-resistant and has a certain degree of elasticity, and can tightly fit with the similarly conical connecting port.

[0094] In this embodiment, the centrifugal structure includes a deflector plate 7, which is provided with a plurality of deflector channels 71 evenly distributed along its circumference. One end of each deflector channel communicates with the air inlet, the other end communicates with the exterior of the filter element, and the interior of the filter element communicates with the air outlet. The deflector channels are composed of two vertically disposed sidewalls and an inclined bottom surface. The two sides of the inclined bottom surface are connected to the bottom edges of the two sidewalls.

[0095] An umbrella-shaped member 72 is provided at the other end of the diversion channel, and the umbrella-shaped member 72 is sleeved on the upper part of the filter element 43. The umbrella-shaped member is trumpet-shaped, and the exhaust gas passing through the diversion channel is further centrifuged under the action of the umbrella-shaped member, thereby achieving better gas-liquid separation. Driven by the cylinder, the sealing body on the long rod is driven to cooperate with the connecting port to realize the opening and closing functions of the connecting port, that is, to realize the mutual independence between the filter cup and the liquid storage cup. The existing filter cup and the liquid storage cup are controlled by a manual ball valve. Since it takes a long time to open and close once in the working condition, the manual ball valve requires a lot of force to open; the bottom valve body of the control is in the form of a ball valve, and combined with the working condition that the on-site liquid is an electrolyte, it will be unstable in opening and closing after long-term use. The use of this solution can improve this problem. In addition, the above structure can realize the liquid extraction operation during the gas-liquid separation process, that is, the two can be carried out simultaneously without affecting each other.

[0096] The upper portion of the liquid storage cup 5 is provided with a vacuum breaker 51. Under the condition of continuous drainage, the vacuum breaker can be manually inserted and removed by plugging a plunger. The lower portion of the liquid storage cup is provided with a liquid discharge port, which is equipped with a pneumatically controlled diaphragm valve. The filter cup and the liquid storage cup are detachably connected. Specifically, the lower sidewall surface of the filter cup is provided with an external thread, and the upper sidewall surface of the liquid storage cup is provided with an internal thread that matches the external thread. Through the above-mentioned structural design, the filter cup and the liquid storage cup are detachably connected, and disassembly and assembly are convenient. Furthermore, liquid extraction operations can be performed during the gas-liquid separation process, that is, both operations can be performed simultaneously without affecting each other.

[0097] The lower part of the liquid storage cup 5 is connected to a movable joint 8, the air-controlled diaphragm valve is arranged in the middle of the movable joint, and the liquid discharge port is located at the lower part of the movable joint. The movable joint is used to control the axial angle between the diaphragm valve body of the air-controlled diaphragm valve and the liquid storage cup.

[0098] In this embodiment, the filter cup and the liquid storage cup are made of transparent PP, and the two are sealed and assembled by an O-ring made of EPDM. The top of the filter cup is provided with a cup cover, the top of the cup cover is provided with a cylinder, and the side of the cup cover is provided with a mounting bracket, which is fixed to the side of the cup cover by a screw insert pre-buried in the cup cover. There is a cyclone guide plate (i.e., guide plate), an umbrella cover (i.e., umbrella-shaped part) and a filter element under the cup cover, and the filter element is connected by threads to press the cyclone guide plate and the umbrella cover tightly between the cup cover and the filter element. In the middle of the core, the umbrella cover is trumpet-shaped and the cyclone guide vane is disc-shaped. The top cylinder is connected to a connecting rod (i.e., a long rod) with a double-layer O-ring installed on the connecting rod. When the top cylinder moves, the double-layer O-ring will move and seal in the top insert. The bottom of the connecting rod is stepped. The large gasket, rubber cone plug and small gasket are limited at the bottom of the connecting rod by the retaining spring. The large gasket and small gasket are located on the upper and lower sides of the rubber cone plug. The rubber cone plug is made of EPDM. The bottom of the filter cup is conical. When the top When the cylinder moves, the rubber cone plug will close the channel at the bottom of the filter cup, and the rubber cone plug and the conical structure at the bottom of the filter cup will assist in guiding the movement of the rubber cone plug; there is a broken vacuum port on the side of the liquid storage cup with a quick-plug connector, which is connected to a separate two-position three-way solenoid valve through an air pipe; the bottom of the liquid storage cup has an external thread, which is connected to a movable joint, and a diaphragm valve body is installed below the movable joint, which is used to control the axial angle between the diaphragm valve body and the liquid storage cup; a vulcanized rubber diaphragm with a pressing sheet is installed on the side of the diaphragm valve body, which is used to seal the channel of the diaphragm valve body, and the rubber diaphragm is fixed to the piston rod of the discharge cylinder by a screw, and a diaphragm valve cover is installed between the discharge cylinder and the rubber diaphragm, the discharge cylinder is fixed on the diaphragm valve cover, and the diaphragm valve cover is fixed on the diaphragm valve body, the discharge cylinder is used to deform the rubber diaphragm, thereby controlling the opening and closing of the bottom discharge channel, and a quick-tighten connector is installed below the diaphragm valve body for connecting the air pipe to circulate the electrolyte.

[0099] The working principle is:

[0100] When collecting waste liquid: the top cylinder and the drain cylinder are connected to the same two-position, three-way solenoid valve and are connected to the atmosphere; the top cylinder is a single-acting, pressurized extension type, and the drain cylinder is a single-acting, compressed return type; the channel is blocked with a plug. Exhaust gas enters from the air inlet, and is guided by the cyclone guide vane and umbrella cover to create a spiral motion. The electrolyte with higher density in the exhaust gas is thrown onto the cup wall due to centrifugal force and slides down into the liquid storage cup at the bottom. The remaining gas is filtered again by the filter element, and the remaining waste liquid is collected in the liquid storage cup. The clean gas is discharged from the air outlet.

[0101] When draining: the top cylinder and the drain cylinder are connected to the same two-position three-way solenoid valve and the compressed air is turned on; the top cylinder pushes out the piston, driving the connecting rod and the rubber cone plug to block the channel between the filter cup and the liquid storage cup, thereby separating the filter cup and the liquid storage cup; the drain cylinder retracts the piston, driving the rubber diaphragm, so that the rubber diaphragm and the diaphragm valve body are no longer tightly sealed, and the electrolyte can flow out of this pipe; the vacuum breaking port is connected to a two-position three-way solenoid valve, and the channel is connected to the atmosphere, thereby destroying the vacuum state of the liquid storage cup.

[0102] The operating conditions of the self-draining vacuum gas-liquid separator provided by the present invention are: pressure: -100Kpa to 0.7Mpa, ambient temperature: 0℃-40℃, fluid temperature: 0℃-60℃, minimum cylinder opening pressure: 0.3Mpa, and maximum volume 500ml.

[0103] In this embodiment, the air-controlled diaphragm valve includes a valve body 1 with openings at both ends and a pneumatic control cavity 2 with an opening at one end; the openings at both ends of the valve body 1 are coaxially and vertically arranged; the two ends of the valve body 1 adopt a flange connection structure to facilitate connection with the injection equipment.

[0104] A valve port 11 is provided in the middle of the valve body 1, and the shape of the valve port 11 is circular. The open end of the pneumatic control cavity 2 is connected to the valve port 11 to form a T-shaped structure; the valve port 11 is provided with an annular groove 111 at the inner edge of the circle, and the annular groove 111 is used to adapt to the annular flange provided on the outer edge of the diaphragm body, so that the outer edge of the diaphragm body can always remain inside the annular groove, that is, during the movement of the valve core, the diaphragm body can move except its outer edge. This design is to ensure the gas-liquid separation between the valve body and the pneumatic control cavity.

[0105] The opening of the valve body 1 has a diameter of 14 mm. A guide surface 12 and a liquid outlet hole 13 provided on the guide surface are provided in the middle of the valve body. The diameter of the liquid outlet hole 13 is 10 mm. The angle formed between the guide surface 12 and the axial direction of the valve body 1 is 38°. The axial direction of the liquid outlet hole 13 is perpendicular to the axial direction of the valve body 1. The valve port 11 is provided at a position corresponding to the liquid outlet hole 13 and the valve port 11 is provided coaxially with the liquid outlet hole 13. The guide surface is a side of a guide wall facing the upper port. The side of the guide wall facing the valve port forms a smooth arc groove with the edge of the valve port to prevent electrolyte accumulation, crystallization, and blockage. The side of the guide wall facing the valve port is the side opposite to the guide surface, and the two are parallel to each other.

[0106] The interior of the pneumatic control chamber 2 is a cylindrical cavity; a valve core 21 is coaxially arranged and axially slidable in the pneumatic control chamber 2, the middle portion of the valve core 21 abuts against the inner side wall of the pneumatic control chamber 2, and a flexible diaphragm body 211 is provided on the end of the valve core 21 facing the valve port. The diaphragm body 211 includes a sealing body 212 located in the center, a deformable portion 213 connected to the outer edge of the sealing body 212, and a flange 214 connected to the outer edge of the deformable portion 213. A constricted space 3 for accommodating the flange is formed between the valve port 11 of the valve body and the open end surface of the pneumatic control chamber; a groove 22 is provided on the inner side surface of the other end of the pneumatic control chamber 1 opposite to its one end opening. In this embodiment, an end cover 23 is provided on the other end of the pneumatic control chamber opposite to its one end opening. The end cover 23 is screwed to the pneumatic control chamber 2, and the groove 22 is provided on the inner side surface of the end cover, specifically at a position coaxial with the central axis of the valve core. A sliding bearing 221 is embedded in the inner wall of the groove 22 , and one end of the valve core away from the valve port extends into the groove 22 and cooperates with the sliding bearing 221 .

[0107] In this embodiment, an annular edge is provided at the edge of the flange of the diaphragm body facing the valve port of the matching valve body (ie, in the direction opposite to the protrusion), and the annular edge is adapted to the annular groove on the valve port.

[0108] During assembly, one side of the diaphragm is embedded in the valve body, and the other side is compressed and sealed by the end face of the guide block in front of the valve core. The center of the diaphragm is connected to the valve core through the diaphragm fixing screw and sealed, completely separating the valve body injection channel from the pneumatic control part. First, it can reduce the influence of other structures, and the electrolyte will not flow to the back of the diaphragm to cause electrolyte accumulation and crystallization; second, it can reduce the direct contact between the liquid medium, i.e. the electrolyte, and other structural parts; third, it can avoid the expansion or contraction of the diaphragm caused by the influence of electrolyte or DEC solvent on the opening and closing functions of the injection valve.

[0109] Structurally, the control medium is separated from the pneumatic control structure by a diaphragm. Except for the valve body, diaphragm, and diaphragm fixing screws that are in direct contact with the electrolyte and require the use of materials with high corrosion resistance, the rest can use materials with relatively weak corrosion resistance and easy processing.

[0110] In this embodiment, a front guide block 24 is sleeved on the valve core 21 and is located between the diaphragm body 211 and the middle portion of the valve core. An air control port 247 is provided on the sidewall of the pneumatic control chamber and is located between the front guide block 24 and the middle portion of the valve core. A pressure relief port 241 is provided on the front guide block 24, which connects the space between the diaphragm body 211 and the front guide block 24 to the outside of the pneumatic control chamber 2. By providing a pressure relief port on the front guide block between the diaphragm body and the middle portion of the valve core and connecting the space between the diaphragm body and the front guide block to the outside of the pneumatic control chamber, back pressure generated between the diaphragm body and the front guide block after repeated movement of the valve core is avoided, thereby ensuring the airtightness of the valve core.

[0111] One end of the pneumatic control chamber has an opening and the end face of the opening is a stepped surface. An annular flange that matches the stepped surface is provided at the edge of the valve core front guide block. The annular flange abuts against the diaphragm body on one side facing the diaphragm body, thereby achieving the cooperation between the valve core front guide block and the pneumatic control chamber, so that the valve core front guide block does not move with the valve core. The pressure relief port is provided near the edge of the valve core front guide block, and there is a gap between the side wall of the valve core front guide block corresponding to the pressure relief port and the open end face of the pneumatic control chamber. An exhaust port is provided on the inner wall of the pneumatic control chamber, and the pressure relief port is connected to the exhaust port through the above-mentioned gap, thereby discharging the gas to the outside of the pneumatic control chamber.

[0112] The inner sidewall of the valve core front guide block 24, where it contacts the valve core, is provided with two inner annular grooves 242. Each inner annular groove 242 is embedded with a first leather cup 243 that abuts the valve core. The first leather cup 243 has a size of φ13mm. The middle portion of the valve core 21 abuts the inner sidewall of the pneumatic control chamber, where it has an annular protrusion 215. The annular protrusion 215 is provided with a second leather cup 216. The second leather cup 216 has a size of φ21mm. The outer sidewall of the second leather cup 216 abuts the inner sidewall of the pneumatic control chamber 2. The outer sidewall of the valve core front guide block 24 abuts the inner sidewall of the pneumatic control chamber, where it has an outer annular groove 244. An O-ring 245 is embedded in the outer annular groove 244. The O-ring has a size of φ17mm x φ2mm.

[0113] In this embodiment, the edge of the valve core front guide block 24, on one end surface facing the valve port, has an annular edge 246 extending toward the valve port. A first annular groove is provided around the valve port of the valve body. A gap exists between the end surface of the annular edge and the first annular groove, and together they form the constricted space. This structural design ensures that, during assembly, the gap exists between the end surface of the annular edge of the valve core front guide block and the first annular groove located around the valve port of the valve body, and together they form the constricted space.

[0114] The sealing body 212 has a closed cavity 2121 integrally formed at its center, within which a metal pressing piece 2122 is embedded. This metal pressing piece, made of a stainless steel plate and vulcanized with rubber, is embedded in the center of the diaphragm. This design enhances the strength of the diaphragm and improves the smoothness of its opening, greatly improving the reliability and stability of the valve body.

[0115] In this embodiment, the thickness of the diaphragm body corresponding to the deformable portion is thinner than the thickness of the diaphragm body corresponding to the seal and flange. Specifically, a thinner "U"-shaped ring structure is formed between the outer flange structure of the diaphragm and the central seal structure. This structure facilitates deformation of the diaphragm during the opening and closing strokes, preventing excessive stretching that could affect the valve opening and diaphragm life. This ensures the deformation characteristics of the deformable portion and further ensures that the flange remains confined within the constricted space.

[0116] This embodiment also includes a diaphragm fixing screw 25. The sealing body 212 has through holes on both end surfaces corresponding to the closed cavity, namely a first through hole 2123 and a second through hole 2124. The first through hole 2123 has a smaller diameter than the second through hole 2124. A third through hole 2125 is provided at the center of the metal pressing plate, and its diameter is smaller than that of the first through hole. The first, third, and second through holes are coaxially arranged. One end of the diaphragm fixing screw 25 passes through the first, third, and second through holes 2123, 2125, and 2124 in sequence, and is then fixedly connected to a mounting hole on the end of the valve core facing the valve port. Through this structural design, the diaphragm body is fixed to the valve core, allowing the diaphragm body to move with the valve core. Among them, the first through hole is a horn hole, the end close to the third through hole has a large diameter, which is larger than the aperture of the third through hole, and the other end has a small diameter, which is equal to the aperture of the third through hole. During injection molding, it is convenient for the upper and lower injection molding blocks to clamp the metal pressing sheet to achieve the positioning effect.

[0117] The sealing body 212 has a second annular groove 2126 formed on the end surface corresponding to the first through hole, surrounding the first through hole. The diaphragm fixing screw 25 has an annular flange on the other end, which is embedded in the second annular groove 2126. Through the above structural design, the end surface where the diaphragm and the diaphragm fixing screw are pressed together has a concave groove structure, and the corresponding pressing end surface of the fixing screw has a flange structure. The diaphragm fixing screw passes through the center of the diaphragm, the diaphragm pressing plate, the spring washer, and the center hole of the valve core in sequence. At the same time, the flange structure of the pressing end surface of the diaphragm fixing screw is embedded in the concave groove of the diaphragm. This structure not only seals the diaphragm and the diaphragm fixing screw, but also prevents the diaphragm from falling out of the pressing surface of the diaphragm fixing screw during the opening and closing process, causing a leak. This greatly improves the reliability and stability of the diaphragm operation.

[0118] A plurality of semicircular sealing rings 2127 are provided on the contact surface between the diaphragm body and the other end of the diaphragm fixing screw to enhance the sealing performance therebetween.

[0119] A plurality of protrusions 2128 are arranged in a circular pattern and spaced apart from one another along the edge of one outer side of the enclosed cavity. There are eight protrusions 2128, positioned at the eight corners of a regular octagon. This structural design enhances its strength, and channels are formed between adjacent protrusions to facilitate the discharge of root gas.

[0120] The bottom of the groove 22 is provided with a baffle 222. The groove width of the groove 22 is adapted to the outer diameter of the sliding bearing 221. The notch of the groove 22 is provided with a reduced diameter edge 223. The width of the reduced diameter edge 223 is adapted to the inner diameter of the sliding bearing 221. The bottom of the groove is provided with a baffle, and a vent hole is provided at the center of the baffle. In this embodiment, the vent hole has a specification of φ1.5mm-φ2mm, preferably φ2mm. The vent hole is connected to the outside world, facilitating exhaust. The baffle provides buffering protection and dust protection for the end of the valve core. Through the above structural design, the sliding bearing is embedded in the inner wall of the groove. The reduced diameter edge provided at the notch of the groove prevents the sliding bearing from detaching. The width of the reduced diameter edge is greater than the inner diameter of the sliding bearing, which facilitates the end of the valve core to penetrate deeply into the sliding bearing when the valve core is installed.

[0121] In this embodiment, the groove width of the groove 22 is equal to the outer diameter of the sliding bearing 221 ; and the width of the reduced diameter edge 223 is greater than the inner diameter of the sliding bearing 221 .

[0122] The valve core 21 is fitted with a magnetic ring 26. An annular protrusion 215 is located in the center of the valve core. A gasket 27 is fitted over the valve core 21. One side of the annular protrusion 215 and the gasket 27 respectively contact the two side faces of the magnetic ring 26 to clamp the magnetic ring 26. A magnetic switch 28 is located on the outer wall of the pneumatic control chamber and corresponds to the trigger position of the injection control valve. This structural design allows the gasket to elastically grip the valve core. The magnetic ring is secured to the valve core through the combined clamping of the annular protrusion and gasket, and moves with the valve core, eliminating the need for adhesives, screws, or other fastening methods, facilitating quick assembly.

[0123] The outer wall of the pneumatic control chamber 2 is provided with a strip-shaped through-slot 29 extending along its axial direction. The width of the strip-shaped through-slot 29 is adapted to the width of the magnetic switch 28. The magnetic switch 28 is provided with an elastic member, which abuts against the bottom of the strip-shaped through-slot. Through the above-mentioned structural design, the magnetic switch can be assembled at any position of the strip-shaped through-slot, realizing adjustable detection position. By abutting the elastic member against the bottom of the strip-shaped through-slot, the magnetic switch can be installed in the strip-shaped through-slot. When the magnetic switch is pressed to compress the elastic member, the position of the magnetic switch in the strip-shaped through-slot can be adjusted. When the magnetic switch is released to elastically expand the elastic member, the magnetic switch can be fastened in the strip-shaped through-slot. An indicator light is integrated on the magnetic switch. When a magnetic ring is detected, the indicator light lights up for easy observation.

[0124] Alternatively, the magnetic switch may be provided with a set screw whose travel range matches the depth of the strip-shaped slot. When the magnetic switch is adjusted to a desired position within the strip-shaped slot, the set screw is rotated to secure the magnetic switch within the strip-shaped slot. These two methods can be combined.

[0125] There are two strip-shaped through-slots 29, arranged parallel to each other. The two magnetic switches 28 are located within each of the two strip-shaped through-slots 29 and correspond to different trigger positions of the injection control valve. This structural design allows for two magnetic switches to detect two different trigger positions. One of the two axial ends of the strip-shaped through-slot is closed, while the other is open. The width of the strip-shaped through-slot near the open end is greater than the width near the closed end. This structural design facilitates assembly of the magnetic switch.

[0126] In this embodiment, a spring 217 is also included, which is sleeved on the valve core. One end of the spring 217 abuts against the side of the washer 27 away from the magnetic ring, and the other end of the spring 217 abuts against the edge of the groove 22. This structural design compresses the spring when the valve core moves toward the groove, giving it a certain restoring force, which facilitates reset.

[0127] In this embodiment, a simpler pneumatically controlled diaphragm valve can also be used. Its specific structure includes a valve body 91 with openings at both ends, a diaphragm cover 92, a rubber diaphragm 93, and a cylinder 94. A valve port is located in the center of the valve body. One end of the diaphragm cover is connected to the valve port, and the other end is connected to the cylinder body. The rubber diaphragm is located inside the diaphragm cover and attached to the free end of the cylinder's drive rod. The rubber diaphragm mates with the flow passage in the valve port. The pneumatically controlled diaphragm valve is normally closed, and the cylinder is a single-acting, pressure-and-return cylinder. It is attached to the diaphragm cover with four screws, which in turn are attached to the valve body with four screws. A single screw locks the rubber diaphragm to the cylinder's drive rod. The valve body and drive rod force the rubber diaphragm to press against the valve body's flow passage. When air is applied to the cylinder, the drive rod retracts, pulling the rubber diaphragm, opening the valve body's flow passage. The opening and closing of the overall air-controlled diaphragm valve is achieved by venting and deflating the cylinder. The cylinder 94 can be controlled in a unified manner with the cylinder located outside the upper end of the filter cup, which can save components and adapt to specific working conditions.

[0128] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-draining vacuum gas-liquid separator, comprising a filter cup and a liquid storage cup, wherein the filter cup is arranged above the liquid storage cup and is in communication with the liquid storage cup, an air inlet and an air outlet are provided at the upper end of the filter cup, and a filter element is provided in the filter cup, characterized in that: The filter cup is further provided with a centrifugal structure, comprising a guide plate, the guide plate being provided with a plurality of guide channels evenly distributed along the circumference of the guide plate, one end of the guide channel being connected to the air inlet, the other end of the guide channel being connected to the outside of the filter element, and the inside of the filter element being connected to the air outlet; An umbrella-shaped member is provided at the other end of the diversion channel and the umbrella-shaped member is sleeved on the upper part of the filter element; The upper part of the liquid storage cup is provided with a vacuum breaking port, the lower part of the liquid storage cup is provided with a liquid discharge port, the liquid discharge port is provided with an air-controlled diaphragm valve, and the filter cup is detachably connected to the liquid storage cup; The pneumatically controlled diaphragm valve comprises a valve body with openings at both ends and a pneumatic control cavity with an opening at one end; a valve port is provided in the middle of the valve body, and the open end of the pneumatic control cavity is connected to the valve port to form a T-shaped structure; the opening of the valve body has a caliber ranging from 6 mm to 25 mm, a guide surface and a liquid outlet hole provided on the guide surface are provided in the middle of the valve body, the axial direction of the liquid outlet hole is perpendicular to the axial direction of the valve body, the valve port is arranged corresponding to the position of the liquid outlet hole and the valve port and the liquid outlet hole are arranged coaxially, and the diameter of the liquid outlet hole ranges from 6 mm to 20 mm; A valve core is coaxially arranged and axially slidable in the pneumatic control cavity. The middle part of the valve core abuts against the inner wall of the pneumatic control cavity. A flexible diaphragm body is provided on the end of the valve core facing the valve port. The diaphragm body includes a sealing body located in the center, a deformation part connected to the outer edge of the sealing body, and a flange connected to the outer edge of the deformation part. A constricted space for accommodating the flange is formed between the valve port of the valve body and the open end face of the pneumatic control cavity. A groove is provided on the inner side face of the other end of the pneumatic control cavity opposite to the opening at one end thereof, and a sliding bearing is embedded in the inner side wall of the groove. The end of the valve core away from the valve port extends into the groove and cooperates with the sliding bearing.

2. A self-draining vacuum gas-liquid separator according to claim 1, characterized in that: A cylinder is provided on the outside of the upper end of the filter cup, and a coaxially arranged long rod is provided on the output shaft of the cylinder. The long rod is located in the filter cup and penetrates from one end of the filter element to the other end of the filter element along the axial direction of the filter element. A sealing body is provided on the end of the long rod passing through the other end of the filter element. A connecting port connected to the liquid storage cup is provided at the lower end of the filter cup, and the sealing body is adapted to the connecting port.

3. A self-draining vacuum gas-liquid separator according to claim 2, characterized in that: The sealing body is a rubber cone plug.

4. A self-draining vacuum gas-liquid separator according to claim 1, characterized in that: The lower side wall surface of the filter cup is provided with an external thread, and the upper side wall surface of the liquid storage cup is provided with an internal thread matching the external thread.

5. The self-draining vacuum gas-liquid separator according to claim 1, characterized in that: The lower part of the liquid storage cup is connected with a movable joint, the air-controlled diaphragm valve is arranged in the middle part of the movable joint, and the liquid discharge port is located at the lower part of the movable joint.

6. A self-draining vacuum gas-liquid separator according to claim 1, characterized in that: A front guide block of the valve core is sleeved on the valve core and the front guide block of the valve core is located between the diaphragm body and the middle part of the valve core, an air control port is provided on the side wall of the pneumatic control cavity and the air control port is located between the front guide block of the valve core and the middle part of the valve core, a pressure relief port is provided on the front guide block of the valve core, and the pressure relief port enables the space between the diaphragm body and the front guide block of the valve core to communicate with the outside of the pneumatic control cavity.

7. The self-draining vacuum gas-liquid separator according to claim 1, characterized in that: The air-controlled diaphragm valve includes a valve body with openings at both ends, a diaphragm cover, a rubber diaphragm and a cylinder; a valve port is provided in the middle of the valve body, one end of the diaphragm cover is connected to the valve port, and the other end of the diaphragm cover is connected to the cylinder body of the cylinder; the rubber diaphragm is located inside the diaphragm cover and is provided on the free end of the driving rod of the cylinder; the rubber diaphragm cooperates with the flow channel opening in the valve port.

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