A, B valve with purging suction function

Abstract

The utility model discloses a kind of A, B valve with purging suction function, including A valve and B valve, B valve body is detachably installed and fixed in A valve body, the mutual far end of A valve and B valve is respectively sealed and connected two different containers;A, B valve body is respectively equipped with valve seat, valve plate, valve cover, A valve body upper end inner side is equipped with several A valve upper end grooves, one of A valve upper end grooves is equipped with press-in ring handle lock pin, A, B valve plate is installed in valve body by corresponding valve bearing seat, and handle assembly is equipped on the outer extension shaft end of A valve plate;The outer side wall of A valve body is symmetrically equipped with purging port one and purging port two;The utility model solves the difficulty of cleaning residual liquid in the cleaning process of valve body, time-consuming and laborious, high cost, and the influence of residual liquid phenomenon on cleaning sterilization;It is convenient to purging cleaning after transfer, and efficiency is high;It can also help to dry the cleaning water;Optimize cleaning process, reduce cleaning sterilization cost.

Description

Technical Field

[0001] This utility model relates to a valve, and more particularly to an A and B valve with purging and suction functions used in chemical, biopharmaceutical, and food production processes. Background Technology

[0002] A and B valves are widely used in the production processes of chemical, biopharmaceutical, and food industries. They are mainly used for the closed transfer of powder materials. However, the common A and B valves on the market do not have purging or suction functions, so they cannot meet the requirements for the transfer of highly active or toxic materials.

[0003] For example, the utility model patent CN218582265U, entitled "An A Valve in an A / B Valve," mainly comprises a valve body, a valve ring, and a limiter. Its structure only meets the general requirements for the use of A and B valves, namely, by setting a limit or locking mechanism on the valve body or valve ring, it satisfies the self-locking or interlocking requirements of A and B valves in application, preventing misoperation. However, because its valve plate is also derived from a traditional butterfly valve, the butterfly plates of valve A and valve B are combined into one unit for opening or closing. Since the butterfly plate is composed of two parts combined twice, a gap inevitably exists between the two plates. This gap allows a certain amount of material dust to enter during actual use. After the A and B valves have completed the material transfer and separation, this dust will be exposed, polluting the environment and endangering human health. Therefore, this technology cannot be applied to the transfer of highly reactive or toxic materials.

[0004] In addition, as sanitary valves, cleaning and sterilization are generally required for valves A and B. After cleaning, a certain amount of cleaning water will remain in the valve cavity of valve A, which is difficult to remove completely. This poses a serious challenge to the cleaning process, often requiring multiple rinses to ensure that valve A is clean, resulting in significant time and application costs.

[0005] Existing technologies cannot adequately address the handling of highly active or toxic materials when using valves A and B. Furthermore, the residual liquid within the valve cavity of valve A during the cleaning and sterilization process significantly impacts the cleaning and sterilization process, resulting in numerous defects. Utility Model Content

[0006] To overcome the shortcomings of the existing technology, this utility model is achieved through the following technical solution: A valve A and a valve B with purging and suction functions are disclosed. The valve body of valve B is detachably mounted and fixed to the valve body of valve A. The far ends of valves A and B are respectively sealed to two different containers. Valve body A is equipped with valve seat, valve plate, and valve cover. The upper inner side of valve body A has several upper grooves, one of which contains a clamping ring handle locking pin and a valve compression spring. The valve plate is mounted to valve body A via a valve bearing seat. The valve body includes a handle assembly mounted on the outer shaft end of the valve plate of valve A; valve body of valve B includes a valve seat, valve plate, bearing seat, and cover of valve B, with the valve plate of valve B mounted on the valve body via the bearing seat of valve B; purge port one and purge port two are symmetrically mounted on the outer wall of valve body of valve A, with purge port one channel one and purge port one channel two provided at the end of valve body of valve A connected to purge port one, and purge port two channel two provided at the end of valve body of valve A connected to purge port two.

[0007] Preferably, purge port one channel one and purge port one channel two are arranged in a figure eight shape, and purge port two channel one and purge port two channel two are also arranged in a figure eight shape. The figure eight shaped purge port channel structure provides a wider purging area, cleaner purging, and higher efficiency.

[0008] Preferably, the handle assembly includes a handle seat, a handle locking pin, a handle rod, a limit pin groove, and a stroke groove. The handle assembly is fixed to the valve plate of valve A by countersunk screws. The handle assembly is also provided with a limit block and a limit pin. The outer end of the limit pin is located in the limit pin groove. The upper end of the limit pin groove is connected to the right side of the stroke groove. The other end of the limit pin is connected to the inner side of the handle seat. The inner side and the outer side of the handle seat are movably connected. The lower end of the limit pin is provided with a spring.

[0009] Preferably, an O-ring seal is installed between the valve plate of valve A and the bearing seat of valve A, and an O-ring seal is installed between the bearing seat of valve A and the valve body of valve A. The valve body of valve A is also equipped with a pressure cap, valve cover of valve A, guide seat one, guide seat two and a pressure ring assembly. The pressure ring assembly is installed on the upper end of the valve body of valve A by pressure ring bolts.

[0010] Preferably, the clamping ring assembly includes: a clamping ring, a clamping ring handle and a clamping ring limiting rod installed on both sides of the periphery of the clamping ring, a clamping ring waist-shaped groove circumferentially disposed on the clamping ring, a clamping ring positioning slot, a clamping ring inclined step and a clamping ring middle groove. The outer circumferential side of the clamping ring is provided with a clamping ring handle mounting hole one, a clamping ring handle mounting hole two, and a clamping ring limiting rod mounting hole. The number of clamping ring positioning slots is the same as the groove at the upper end of valve A. When the clamping ring assembly of valve A is in the middle locked position, the end face of the clamping ring is positioned so that the middle groove of the clamping ring aligns with the upper groove of valve A on the valve body, forming a closed space for vertical movement. Valve B can move up and down within the depth range of this closed space. Due to gravity, a certain gap is formed between the valve plates of valves A and B. At this time, air blowing can clean the material stuck in the gap of the valve plates, avoiding the risk of exposure to highly active and toxic materials. After blowing, when cleaning fluid (such as water) is introduced into the cleaning channel, the space between valve plates A and B and the valve cavity of valve A can be cleaned. When sterilizing steam is introduced into the channel, the valve cavity of valve A and the space between valve plates A and B can be sterilized. Then, the valve is dried by blowing with gas (such as nitrogen). Finally, the clamping ring is locked or loosened according to the aforementioned process, and the valves can be opened and closed, and valves A and B can be separated. Preferably, the valve body of valve B is further provided with a self-locking mechanism, a valve O-ring, and an O-ring three. A positioning pin is provided on the outer side of the valve body of valve B. The positioning pin includes valve body positioning locking pin one, valve body positioning locking pin two, valve body positioning locking pin three, and valve body positioning locking pin four. The positioning pin cooperates with the positioning groove of the compression ring on valve A. A guide post one and a guide post two are symmetrically provided on the valve body of valve B. The guide post one and the guide post two cooperate with the guide seat one and the guide seat two, respectively.

[0011] Preferably, the self-locking mechanism includes a lifting plate, a lifting rod, and a compression spring fitted on the lifting rod. The valve plate of valve B is provided with a limiting groove that matches the lifting rod, and the lifting plate is located at the upper end of the lifting rod.

[0012] In summary, this utility model has the following beneficial effects: This utility model features a purge port 1 and purge port 2 symmetrically installed on the outer wall of the A valve body, and a purge port 1 and purge port 1 channel 2 with a figure-eight shape at one end of the A valve body connecting to the purge port, and a purge port 2 channel 1 and purge port 2 channel 2 with a figure-eight shape at the other end of the A valve body connecting to the purge port. Furthermore, when the A valve's clamping ring assembly is in the middle locked position, the end face of the clamping ring has a middle groove aligned with the upper groove of the A valve on the valve body, forming a closed structure that moves vertically. The ingenious design of the B valve, which allows it to move up and down within the depth of the closed space, solves the problems of difficult-to-clean residual liquid during valve body cleaning, which is time-consuming, labor-intensive, and costly, as well as the impact of residual liquid on cleaning and sterilization. It also facilitates convenient and efficient purging and cleaning after transfer. Furthermore, it effectively ensures that highly active or toxic substances are not exposed during the transfer of food, pharmaceuticals, and chemical products in pressure vessels, guaranteeing the quality of the transferred products while avoiding environmental pollution from highly active or toxic substances, and ensuring the personal safety of personnel during the transfer process. Attached Figure Description

[0013] Figure 1 This is a front view of the A and B valve combination of this utility model; Figure 2 This is a top view of the A and B valve assembly of this utility model. Figure 3 Front view of valves A and B; Figure 4 This is a schematic diagram of the purging state of the A and B valve combination of this utility model; Figure 5 This is a side sectional view of valve A of this utility model; Figure 6 This is a top view of valve A of this utility model; Figure 7 This is a top sectional view of the A valve of this utility model (showing the purge port structure); Figure 8 This is a front view of valve A; Figure 9 This is a side sectional view of valve B of this utility model; Figure 10 This is a top view of valve B of this utility model; Figure 11 This is a front view of valve B of this utility model; Figure 12 Top view of the locking ring of this utility model; Figure 13 This is a bottom view of the locking ring of this utility model; Figure 14 Top view of valve A of this utility model Figure 2 ; Figure 15 for Figure 14 Cross-sectional view along the BB direction; Figure 16 This is a schematic diagram of the outer side of the handle base and the handle.

[0014] In the diagram, 1. Valve body of valve A, 2. Valve plate of valve A, 3. Bearing seat of valve A, 4. O-ring one, 5. O-ring two, 6. Gland, 7. Valve seat of valve A, 8. Valve cover of valve A, 9. Compression ring bolt, 10. Compression ring assembly, 11. Limit stop, 12. Limit pin, 13. Handle assembly, 14. Countersunk screw, 15. Purge port one, 16. Purge port two, 17. Guide seat one, 18. 19. Guide seat 2; 20. B valve body; 21. B valve cover; 22. B valve body O-ring; 23. B valve seat; 24. B valve plate; 25. Lifting plate; 26. Lifting rod; 27. Compression spring; 28. O-ring 3; 29. ​​B valve bearing seat; 30. Guide post 1; 31. Guide post 2; 32. Arrow; 33. A valve cavity; 1-1. A valve upper groove; 1-2 1-3. Compression spring of valve A; 10-1. Compression ring; 10-2. Compression ring handle; 10-3. Compression ring limiting rod; 10-4. Waist-shaped groove of compression ring; 10-5. Positioning groove of compression ring; 10-6. Sloping step of compression ring; 10-7. Middle groove of compression ring; 10-8. First mounting hole of compression ring handle; 10-9. Second mounting hole of compression ring handle; 10-11. Mounting hole of compression ring limiting rod; 13-1. Handle seat; 13-2, Handle locking pin; 13-3, Handle lever; 13-4, Limit pin groove; 13-5, Stroke groove; 15-1, Purge port one channel one; 15-2, Purge port one channel two; 16-1, Purge port two channel one; 16-2, Purge port two channel two; 31-1, B valve body positioning locking pin one; 31-2, B valve body positioning locking pin two; 31-3, B valve body positioning locking pin three; 31-4, B valve body positioning locking pin four. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0017] Reference Figure 1-16As shown, this utility model discloses an A and B valve with purging and suction functions, including an A valve and a B valve. The B valve body 19 is detachably mounted and fixed to the A valve body 1. The far ends of the A and B valves are respectively sealed to two different containers. The A valve body 1 is equipped with an A valve seat 7, an A valve plate 2, and an A valve cover 8. The upper inner side of the A valve body 1 is provided with an upper groove 1-1, in which a pressure ring handle locking pin 1-2 and an A valve compression spring 1- are installed. 3. When valve A is closed and not connected to valve B, the locking pin 1-2 of the clamping ring handle protrudes under the elastic force of the compression spring 1-3 of valve A and is placed in the groove 1-1 at the upper end of valve A. The clamping ring handle 10-2 is restricted from rotation and is in a locked state. The valve plate 2 of valve A is mounted on the valve body 1 of valve A through the valve bearing seat 3. The handle assembly 13 is mounted on the outer shaft end of the valve plate 2 of valve A. The valve body 19 of valve B is equipped with valve seat 22 and valve plate 23 of valve B. B valve bearing seat 28 and B valve cover 20, the B valve plate 23 is mounted on the B valve body 19 via the B valve bearing seat 28; purge port one 15 and purge port two 16 are symmetrically installed on the outer side wall of the A valve body 1, the A valve body 1 has purge port one channel one 15-1 and purge port one channel two 15-2 at the end connected to purge port one 15, and purge port two channel two 16-1 and purge port two channel two 16-2 at the end connected to purge port two 16; A valve on A valve One end of valve cover 8 is machined with a clamp joint; one end of valve cover 20 of valve B is also machined with a clamp joint; the clamp joints on valves A and B connect to two different containers respectively, enabling each container to be sealed; valve seats 7 of valve A and 22 of valve B are made of PTFE (polytetrafluoroethylene), a material whose properties meet the requirements of low friction coefficient, high wear resistance, elastic deformation, corrosion and oxidation resistance, and cleanliness. The valve seat and valve plate are sealed through spherical contact and interference fit. That is, when the valve plate rotates to a horizontal position, the valve seat is squeezed, causing elastic deformation, thereby achieving the effect of sealing the material from the outside world.

[0018] like Figure 4-7 As shown, in this utility model, the valve body 1 of valve A is machined with purge port channel 1-15-1, purge port channel 2-15-2, purge port channel 2-16-1, and purge port channel 2-16-2, with four openings communicating with externally installed purge port 1-15 and purge port 2-16; purge port channel 1-15-1 and purge port channel 2-15-2 are V-shaped, and purge port channel 1-16-1 and purge port channel 2-16-2 are also V-shaped; the airflow for purging, the water flow for cleaning, and the sterilization steam source enter through the purge port 2-16 and are connected to the four openings. Figure 7The flow direction indicated by the arrow is within valve chamber 33 of valve A, and finally flows out from purge port 15 into the filter, vacuum pump, and collection container connected to purge port 15. When cleaning fluid is introduced into this channel, valve chamber 33 of valve A can be cleaned. When airflow is introduced into this channel, valve chamber 33 of valve A can be purged. When sterilizing steam is introduced into this channel, valve chamber 33 of valve A can be sterilized. Cleaning and sterilization are very convenient and efficient.

[0019] like Figure 5 , 6 As shown in Figures 8 and 13, a groove is machined on the valve body 1 of valve A for mounting valve seat 7, and a shaft hole is machined on the side of valve body 1 for mounting valve plate 2 of valve A; valve plate 2 of valve A is mounted on valve body 1 of valve A via valve bearing seat 3; a handle assembly 13 is mounted on the outer shaft end of valve plate 2, the handle assembly 13 including handle seat 13-1, handle locking pin 13-2, and handle rod 13-3; the handle assembly 13 is fixed to valve plate 2 of valve A by countersunk screw 14, and the handle assembly 13 also has The handle seat 13-1 is provided with a limit stop 11 and a limit pin 12. The outer side of the handle seat 13-1 is provided with a limit pin groove 13-4 and a stroke groove 13-5. The outer end of the limit pin 12 is located in the limit pin groove 13-4. The upper end of the limit pin groove 13-4 is connected to the right side of the stroke groove 13-5. The other end of the limit pin 12 is connected to the inner side of the handle seat 13-1. The inner side and the outer side of the handle seat 13-1 are movably connected. The lower end of the limit pin 12 is provided with a spring. The limit pin 12 can move up and down within the limit pin groove 13-4. The up and down movement of the limit pin 12 can lock or unlock the handle. When the limit block 11 moves upward, the limit pin 12 unlocks the handle, and the handle can rotate freely. The outer end of the limit pin 12 slides into the stroke groove 13-5 to open or close the valve. After the handle rod 13-3 closes the valve, the limit block 11 is manually pressed down. The outer end of the limit pin 12 enters the limit pin groove 13-4, and the clamping ring limit rod 10-3 clamps the limit block 11, locking the handle. At this time, the handle is in a non-rotatable state.

[0020] like Figures 1-16As shown, an O-ring seal 1 (4) is installed between the valve plate of valve A and the bearing seat of valve A, and an O-ring seal 2 (5) is installed between the bearing seat of valve A 3 and the valve body of valve A 1. The valve body of valve A is also equipped with a pressure cap 6, a valve cover of valve A 8, a guide seat 17, a guide seat 2 (18) and a pressure ring assembly 10. The pressure ring assembly 10 is installed on the upper end of the valve body of valve A 1 by pressure ring bolts 9. The pressure ring assembly 10 includes: a pressure ring 10-1 and pressure ring handles installed on both sides of the periphery of the pressure ring 10-1. 10-2 and the clamping ring limiting rod 10-3, the clamping ring waist-shaped groove 10-4 circumferentially arranged in the clamping ring 10-1, the clamping ring positioning groove 10-5, the clamping ring inclined step 10-6 and the clamping ring middle groove 10-7, the clamping ring 10-1 has a clamping ring handle mounting hole one 10-8, a clamping ring handle mounting hole two 10-9 and a clamping ring limiting rod mounting hole 10-11 on the circumferential outer side, and the number of the clamping ring positioning groove (10-5) is the same as the groove (1-1) at the upper end of valve A.

[0021] A. A positioning groove is machined on the upper end of the valve body 1, and it aligns with the positioning groove 10-5 of the clamping ring assembly 10 when the clamping ring assembly 10 is in the unlocked state. The operator can operate the clamping ring handle 10-2 to control the rotation of the clamping ring. The rotation angle is limited by the clamping ring waist groove 10-4 and the clamping ring bolt 9 in the groove. When the clamping ring assembly 10 is in the initial rotation position, its clamping ring limit rod 10-3 is in the position of pressing the limit stop 10. At this time, the handle assembly 13 is in the locked state, and the valve is locked in the closed state. When the clamping ring assembly 10 rotates to the middle position... At this time, the clamping ring limiting rod 10-3 is aligned with the middle slot of the limiting block 11. Under the action of the spring force inside the limiting block 11, the clamping ring assembly 10 is locked in this middle position. This position is also the position where the middle groove 10-7 of the clamping ring is aligned with the upper groove 1-1 of valve A on the valve body. When the operator presses down on the limiting block 11 and continues to rotate the clamping ring assembly 10, the clamping ring limiting rod 10-3 can be rotated away from the limiting block 11. At this time, the limiting block 11 pops up upward under the action of the spring force, the handle assembly 13 is unlocked, and the valve can be opened or closed normally.

[0022] like Figure 9-16As shown, the valve body 19 of valve B is also provided with a self-locking mechanism, valve O-ring 21, and O-ring 27. Positioning pins are provided on the outer side of valve body 19. These positioning pins include valve body positioning locking pin 31-1, valve body positioning locking pin 31-2, valve body positioning locking pin 31-3, and valve body positioning locking pin 31-4. The positioning pins cooperate with the positioning groove 10-5 of the compression ring on valve A. Valve body 19 of valve B is symmetrically provided with guide post 29 and guide post 30, which cooperate with guide seat 17 and guide seat 18, respectively. The front ends of both the guide posts and guide seats are provided with a tapered transition. When valves A and B are combined and positioned, the guide posts and guide seats ensure smooth docking even with a certain positioning error.

[0023] The self-locking mechanism of valve B includes a lifting plate 24, a lifting rod 25, and a compression spring 26 fitted onto the lifting rod 25. The valve plate of valve B is provided with a limiting groove that matches the lifting rod 25. The lifting plate 24 is located at the upper end of the lifting rod 25. Under the action of the elastic force of the compression spring 26, the lifting rod 25 is engaged into the limiting groove on the valve plate 23 of valve B, locking it in place. Four positioning locking pins of valve B are used for guidance and initial positioning during the docking process of valves A and B. After valves A and B are initially positioned, valves A and B can be pressed and locked by rotating the clamping ring assembly 10. At this time, valve seat 7 of valve A and bearing seat 28 of valve B are tightly fitted together, and valve plate 2 of valve A and valve plate 23 of valve B are also tightly fitted together. When valves A and B are locked, the lifting plate 24 in the self-locking mechanism of valve B is lifted by valve A, and the lifting rod 25 is also lifted accordingly. The self-locking limit of valve plate 23 of valve B is released. At this time, the valve can be smoothly opened or closed by operating the handle.

[0024] like Figure 9 As shown, a sealing ring groove is machined on the outer side of valve body 19 of valve B for installing valve body O-ring 21 of valve B. When valve B is combined with valve A, valve body O-ring 21 of valve B can form a seal between valve bodies of valves A and B.

[0025] like Figure 1-16 As shown, when the clamping ring assembly 10 of valve A is in the middle locked position, because the end face of the clamping ring 10-1 is provided with a middle groove 10-7, this position is exactly the same as the position where the middle groove 10-7 of the clamping ring is aligned with the upper groove 1-1 of valve A on the valve body, forming a closed space for vertical movement. Valve B can move up and down within the depth range of this closed space. Due to gravity, a certain gap is formed between the valve plates of valves A and B; at this time, if... Figure 4By blowing and drawing air in the direction of airflow, materials stuck in the gaps of the valve plates can be blown away and sucked out, avoiding the risk of exposure to highly active and toxic materials. After blowing, when cleaning liquid (such as water) is introduced into the cleaning channel, the area between valve plates A and B and valve chamber 33 of valve A can be cleaned. When sterilizing steam is introduced into the channel, valve chamber 33 of valve A and the area between valve plates A and B can be sterilized. Then, the area is dried by blowing with gas (such as nitrogen). Finally, the pressure ring is locked or loosened according to the above process to open or close the valve and separate valves A and B.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An A and B valve with purging and suction functions, comprising valve A and valve B, characterized in that: The valve body (19) of valve B is detachably mounted and fixed to the valve body (1) of valve A. The far ends of valve A and valve B are respectively sealed and connected to two different containers. The valve body (1) of valve A is equipped with valve seat (7), valve plate (2) of valve A and valve cover (8). The upper inner side of valve body (1) of valve A is provided with several upper grooves (1-1) of valve A. One of the upper grooves (1-1) of valve A is equipped with a pressure ring handle locking pin (1-2) and valve A compression spring (1-3). The valve plate (2) of valve A is mounted on valve body (1) of valve A through valve bearing seat (3). The outer shaft end of valve plate (2) of valve A is equipped with a handle assembly (13). The valve body (19) of valve B is detachably mounted and fixed to valve body (1). The valve body (19) of valve A is detachably mounted and fixed to valve body (1 ... The valve body (19) is equipped with a B valve seat (22), a B valve plate (23), a B valve bearing seat (28), and a B valve cover (20). The B valve plate (23) is installed on the B valve body (19) through the B valve bearing seat (28). The outer side wall of the A valve body (1) is symmetrically equipped with a purge port one (15) and a purge port two (16). The A valve body (1) is provided with a purge port one channel one (15-1) and a purge port one channel two (15-2) at the end connected to the purge port one (15). The A valve body (1) is provided with a purge port two channel one (16-1) and a purge port two channel two (16-2) at the end connected to the purge port two (16).

2. The A and B valves with purging and suction functions according to claim 1, characterized in that: The first channel of purge port 1 (15-1) and the second channel of purge port 1 (15-2) are in a figure-eight shape, and the first channel of purge port 2 (16-1) and the second channel of purge port 2 (16-2) are in a figure-eight shape.

3. The A and B valves with purging and suction functions according to claim 1, characterized in that: The handle assembly (13) includes a handle seat (13-1), a handle locking pin (13-2), a handle rod (13-3), a limit pin groove (13-4), and a stroke groove (13-5). The handle assembly (13) is fixed to the valve plate (2) of valve A by countersunk screws (14). The handle assembly (13) is also provided with a limit stop (11) and a limit pin (12). The outer end of the limit pin (12) is located in the limit pin groove (13-4). The upper end of the limit pin groove (13-4) is connected to the right side of the stroke groove (13-5). The other end of the limit pin (12) is connected to the inner side of the handle seat (13-1). The inner side of the handle seat (13-1) is movably connected to the outer side. The lower end of the limit pin (12) is provided with a spring.

4. The A and B valves with purging and suction functions according to claim 1, characterized in that: An O-ring seal 1 (4) is installed between the valve plate of valve A and the bearing seat of valve A, and an O-ring seal 2 (5) is installed between the bearing seat of valve A (3) and the valve body of valve A (1). The valve body of valve A is also equipped with a pressure cap (6), valve cover of valve A (8), guide seat 1 (17), guide seat 2 (18) and a pressure ring assembly (10). The pressure ring assembly (10) is installed on the upper end of the valve body of valve A (1) by pressure ring bolts (9).

5. The A and B valves with purging and suction functions according to claim 4, characterized in that: The clamping ring assembly (10) includes: a clamping ring (10-1), a clamping ring handle (10-2) and a clamping ring limiting rod (10-3) installed on both sides of the periphery of the clamping ring (10-1), a clamping ring waist groove (10-4) circumferentially arranged on the clamping ring (10-1), a clamping ring positioning groove (10-5), a clamping ring inclined step (10-6), and a clamping ring middle groove (10-7). The outer circumferential side of the clamping ring (10-1) is provided with a clamping ring handle mounting hole one (10-8), a clamping ring handle mounting hole two (10-9), and a clamping ring limiting rod mounting hole (10-11). The number of clamping ring positioning grooves (10-5) is the same as the upper groove (1-1) of valve A.

6. The A and B valves with purging and suction functions according to claim 5, characterized in that: The valve body (19) of valve B is also provided with a self-locking mechanism, valve O-ring (21), and O-ring three (27). A positioning pin is provided on the outside of valve body (19). The positioning pin includes valve body positioning locking pin one (31-1), valve body positioning locking pin two (31-2), valve body positioning locking pin three (31-3), and valve body positioning locking pin four (31-4). The positioning pin cooperates with the positioning groove (10-5) of the compression ring on valve A. The valve body (19) of valve B is symmetrically provided with guide post one (29) and guide post two (30). The guide post one (29) and guide post two (30) cooperate with guide seat one (17) and guide seat two (18) respectively.

7. The A and B valves with purging and suction functions according to claim 6, characterized in that: The self-locking mechanism includes a lifting plate (24), a lifting rod (25), and a compression spring (26) fitted on the lifting rod (25). The valve plate of valve B is provided with a limiting groove that matches the lifting rod (25). The lifting plate (24) is located at the upper end of the lifting rod (25).

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