Multifunctional valve assembly module

Abstract

The utility model discloses a multifunctional valve assembly module which comprises a control valve unit and a pneumatic control valve unit, the pneumatic control valve unit comprises a vacuum valve and a vacuum breaking valve, a vacuum breaking gas outflow channel is arranged in the vacuum breaking valve, and a positive pressure gas outflow channel and a negative pressure gas outflow channel which can be used alternatively are respectively arranged in the vacuum valve; the control valve unit comprises a vacuum breaking pilot valve and a vacuum pilot valve, a pilot air inlet channel, a vacuum control air channel and a vacuum breaking control air channel are arranged in the control valve unit, the pilot air inlet channel is communicated with the vacuum pilot valve and the vacuum breaking pilot valve, the vacuum pilot valve is communicated with the vacuum valve through the vacuum control air channel, and the vacuum valve is communicated with the vacuum valve through the vacuum control air channel. According to the utility model, multiple functions can be realized through gas path switching, such as vacuum pumping and vacuum breaking operation, the vacuum breaker is suitable for a vacuum generator system and a vacuum pump system, and not only can vacuum be pumped from the system, but also the vacuum state can be quickly broken when needed.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum equipment, and particularly relates to a multifunctional valve assembly module. Background Art

[0002] The valve assembly module plays a crucial role in vacuum equipment. Vacuum equipment such as vacuum generators and vacuum pumps usually includes a main body module, and the valve assembly module is installed on this main body module to ensure the normal operation of the vacuum equipment. However, in the existing technology, the functions of the valve assembly module are relatively single. Usually, each valve assembly module can only achieve one function. This means that if the vacuum equipment wants to complete the vacuum pumping and air breaking operations, it is necessary to separately set up a valve assembly module for vacuum pumping and a valve assembly module for air breaking. For example, a micro integrated vacuum generator disclosed in a Chinese patent application (publication number: CN111059084A) includes a vacuum generating assembly, a first solenoid valve, a second solenoid valve and a gas path assembly. The gas path assembly is provided with a first gas path, a second gas path, a third gas path, a fourth gas path, a fifth gas path and a sixth gas path. The air inlet end is connected to the air supply port of the vacuum generating assembly through the first gas path, the first solenoid valve and the second gas path, and the first solenoid valve is used to control the opening and closing of this gas path; the exhaust port of the vacuum generating assembly is connected to the air outlet end through the third gas path, and the vacuum end is connected to the vacuum port of the vacuum generating assembly through the fourth gas path, so that the vacuum generating assembly can be started by opening the first solenoid valve. The opening and closing of the air breaking gas path is controlled by the second solenoid valve. Operate the second solenoid valve to open the air breaking gas path composed of the fifth gas path, the second solenoid valve and the sixth gas path. The gas source is connected to the vacuum end to supplement gas to it to quickly eliminate its negative pressure until it is completely eliminated, and then the second solenoid valve is closed. By separately setting the first solenoid valve and the second solenoid valve on the vacuum generator, the vacuum pumping and air breaking operations are realized. However, this design not only increases the structural complexity of the equipment, but also makes the gas path design more cumbersome, with high costs and is not conducive to installation and maintenance. Therefore, it is necessary to improve it. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a multifunctional valve assembly module aiming at the defects and deficiencies of the existing technology, which has a simple and reasonable structure, convenient operation, and can realize multiple functions through gas path switching, such as vacuum pumping and air breaking operations.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A multifunctional valve assembly module according to the present utility model includes a control valve unit and a pneumatically controlled valve unit cooperatively connected to the control valve unit. The pneumatically controlled valve unit includes a vacuum valve and a pressure relief valve. A pressure relief gas outflow channel is provided in the pressure relief valve. A positive pressure gas outflow channel and a negative pressure gas outflow channel that can be used interchangeably are respectively provided in the vacuum valve. The control valve unit includes a pressure relief pilot valve and a vacuum pilot valve. A pilot air inlet channel, a vacuum control air passage, and a pressure relief control air passage are respectively provided in the control valve unit. The pilot air inlet channel is respectively communicated with the air inlet ends of the vacuum pilot valve and the pressure relief pilot valve. The air outlet end of the vacuum pilot valve is communicated with the vacuum valve through the vacuum control air passage, thereby controlling the on-off of the positive pressure gas outflow channel or the negative pressure gas outflow channel. The air outlet end of the pressure relief pilot valve is communicated with the pressure relief valve through the pressure relief control air passage, thereby controlling the on-off of the pressure relief gas outflow channel.

[0006] Further, the pneumatically controlled valve is provided with an A port, a B port, and a C port corresponding to and cooperating with the vacuum valve, and a pressure relief valve air inlet and a pressure relief valve air outlet corresponding to and cooperating with the pressure relief valve. The positive pressure gas outflow channel is formed between the A port and the C port. The negative pressure gas outflow channel is formed between the C port and the B port. The pressure relief gas outflow channel is formed between the pressure relief valve air inlet and the pressure relief valve air outlet. The pressure relief valve air inlet is communicated with the air inlet end of the pilot air inlet channel.

[0007] Further, the pressure relief pilot valve and the vacuum pilot valve are arranged vertically, with the pressure relief pilot valve arranged above the vacuum pilot valve. The vacuum valve and the pressure relief valve are arranged vertically, with the vacuum valve arranged above the pressure relief valve.

[0008] Further, the pneumatically controlled valve unit further includes a pneumatically controlled valve body. A partition is provided in the pneumatically controlled valve body. The partition divides the inner cavity of the pneumatically controlled valve body into an upper installation cavity and a lower installation cavity. The vacuum valve is fixedly arranged in the upper installation cavity, and the pressure relief valve is fixedly arranged in the lower installation cavity.

[0009] Further, the control valve unit further includes a manifold plate. A receiving space is provided in the manifold plate. A mounting plate is provided in the manifold plate. The mounting plate divides the receiving space into an upper receiving cavity and a lower receiving cavity. The pressure relief pilot valve is fixedly arranged in the upper receiving cavity, and the vacuum pilot valve is fixedly arranged in the lower receiving cavity.

[0010] Further, a valve stem A is movably arranged in the vacuum valve. A valve stem A upper cavity is provided between the upper end surface of the valve stem A and the pneumatically controlled valve body. A valve stem A lower cavity is provided between the lower end surface of the valve stem A and the partition. A valve stem B is movably arranged in the pressure relief valve. A valve stem B upper cavity is provided between the upper end surface of the valve stem B and the partition. A valve stem B lower cavity is provided between the lower end surface of the valve stem B and the pneumatically controlled valve body. The vacuum control air passage is communicated with the valve stem A upper cavity. The pressure relief control air passage is respectively communicated with the valve stem A lower cavity and the valve stem B upper cavity.

[0011] Further, the partition plate is provided with ventilation openings which are respectively communicated with the lower cavity of the valve stem A and the upper cavity of the valve stem B, and the air outlet end of the air-breaking control air passage is communicated with the ventilation openings.

[0012] Further, a first plug cap is provided at the upper end of the pneumatic control valve body, a second plug cap is provided at the lower end of the pneumatic control valve body, a first manual rod is provided on the first plug cap, and the lower end of the first manual rod extends into the upper installation cavity to cooperate with the vacuum valve for controlling the air path switching of the vacuum valve.

[0013] Further, a second manual rod is provided on the air-breaking pilot valve, and the second manual rod is used for controlling the air path switching of the air-breaking pilot valve.

[0014] Further, both the vacuum valve and the air-breaking valve are two-position two-way pneumatic control valves, and both the vacuum pilot valve and the air-breaking pilot valve are two-position three-way solenoid valves.

[0015] The beneficial effects of the present utility model are as follows: The multifunctional valve assembly module of the present utility model can realize various functions through air path switching. For example, it can perform vacuum pumping and air-breaking operations, and can be applied to vacuum generator systems and vacuum pump systems. It can not only pump vacuum from the system to reach the required vacuum degree, but also quickly break the vacuum state when needed. The vacuum valve and the air-breaking valve are arranged vertically, and the air-breaking pilot valve and the vacuum pilot valve are arranged vertically, making the overall structure more compact, thus saving installation space and facilitating installation and subsequent maintenance work. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the structural schematic diagram of the present utility model under the first section;

[0018] Figure 3 is the structural schematic diagram of the present utility model under the second section;

[0019] Figure 4 is the structural schematic diagram of the present utility model under the third section;

[0020] Figure 5 is the schematic diagram of the manifold under the first section;

[0021] Figure 6 is the structural schematic diagram of the pneumatic control valve body from the first perspective;

[0022] Figure 7 is the structural schematic diagram of the pneumatic control valve body from the second perspective;

[0023] Figure 81 is a schematic structural diagram of the manifold under the second section;

[0024] Figure 9 It is a structural diagram of the adjusting rod;

[0025] Figure 10 Schematic diagram of the structure of the first blocking cap;

[0026] Figure 11 It is a structural diagram of the air control valve body from a third perspective.

[0027] Figure 1 - Figure 11 In: 1. Control valve unit; 11. Purge pilot valve; 111. Second manual lever; 12. Vacuum pilot valve; 13. Pilot air inlet passage; 14. Vacuum control airway; 15. Purge control airway; 16. Air control valve body; 161. First plugging cap; 1611. First manual lever; 16111. Adjusting rod; 16112. Return spring C; 16113. Boss; 16114. Stop block; 1612. Stop groove; 1613. Ring groove; 162. Second plugging cap; 163. Partition plate; 1631. Vent; 164. Pilot air port A; 165 , pilot air port B; 166, confluence port; 2, air-controlled valve unit; 21, vacuum valve; 211, port A; 212, port B; 213, port C; 214, valve stem A; 2141, upper cavity of valve stem A; 2142, lower cavity of valve stem A; 2143, reset spring A; 22, rupture valve; 221, rupture valve air inlet; 222, rupture valve air outlet; 223, valve stem B; 2231, upper cavity of valve stem B; 2232, lower cavity of valve stem B; 2233, reset spring B; 23, confluence plate; 231, mounting plate; 3, elastic pin; 4, confluence plate sealing gasket. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1 - Figure 11A multifunctional valve assembly module is shown, comprising a control valve unit 1 and an air-controlled valve unit 2 connected to the control valve unit 1, wherein the control valve unit 1 comprises an air-breaking pilot valve 11 and a vacuum pilot valve 12 arranged in an upper and lower manner, wherein the air-breaking pilot valve 11 is arranged above the vacuum pilot valve 12, and the air-controlled valve unit 2 comprises a vacuum valve 21 and an air-breaking valve 22 arranged in an upper and lower manner, wherein the vacuum valve 21 is arranged above the air-breaking valve 22. Preferably, in this embodiment, the vacuum valve 21 and the air-breaking valve 22 are both two-position two-way air-controlled valves, and the vacuum pilot valve 12 and the air-breaking pilot valve 11 are both two-position three-way solenoid valves. The vacuum pilot valve 12 is used to control the operation of the vacuum valve 21, and the air-breaking pilot valve 12 is used to control the operation of the vacuum valve 21. The guide valve 11 is used to control the operation of the air rupture valve 22. Preferably, in this embodiment, the air-controlled valve unit 2 also includes an air-controlled valve body 16, and the vacuum valve 21 and the air rupture valve 22 are arranged in the air-controlled valve body 16 to protect the vacuum valve 21 and the air rupture valve 22 and ensure their stable operation. Preferably, in this embodiment, a partition 163 is provided in the air-controlled valve body 16, and the partition 163 divides the inner cavity of the air-controlled valve body 16 into an upper mounting cavity and a lower mounting cavity. The vacuum valve 21 is arranged in the upper mounting cavity, and the air rupture valve 22 is arranged in the lower mounting cavity. This structural layout is compact and occupies little space. The vacuum valve 21 and the air rupture valve 22 can work together in the air-controlled valve body 16 to achieve different functions.

[0030] Preferably, in this embodiment, the control valve unit 1 also includes a manifold 23, a accommodating space is formed in the manifold 23, and a mounting plate 231 is provided in the manifold 23, and the mounting plate 231 divides the accommodating space into an upper accommodating chamber and a lower accommodating chamber. The air-breaking pilot valve 11 is fixed in the upper accommodating chamber, and the vacuum pilot valve 12 is fixed in the lower accommodating chamber. This structural layout is compact and occupies little space. The vacuum pilot valve 12 and the air-breaking pilot valve 11 can work together in the manifold 23 to achieve different functions.

[0031] Preferably, in this embodiment, a valve stem A214 is movably provided in the vacuum valve 21, a valve stem A upper cavity 2141 is provided between the upper end surface of the valve stem A214 and the air control valve body 16, a valve stem A lower cavity 2142 is provided between the lower end surface of the valve stem A214 and the partition 163, a valve stem B223 is movably provided in the air break valve 22, a valve stem B upper cavity 2231 is provided between the upper end surface of the valve stem B223 and the partition 163, a valve stem B lower cavity 2232 is provided between the lower end surface of the valve stem B223 and the air control valve body 16. Preferably, in this embodiment, refer to Figure 6 The partition 163 is provided with a vent 1631 for connecting the lower cavity 2142 of the valve stem A and the upper cavity 2231 of the valve stem B.

[0032] Specifically, a return spring B2233 for controlling the return of the valve stem B223 is provided in the upper cavity 2231 of the valve stem B. It should be noted that the valve stem A214 can also achieve the return function by moving upward under the control of the air-breaking control air passage 15. Therefore, the user can selectively assemble the return spring A2143 for the return of the valve stem A214 according to their actual needs. When the user chooses not to assemble the return spring A2143 in the lower cavity 2142 of the valve stem A, the valve assembly module can achieve the power-off holding function. Specifically, when the valve assembly module suddenly loses power during vacuum pumping, the valve stem A214 will not automatically return but always remain in the current position, causing the valve assembly module to remain in the vacuum pumping state. When the user chooses to assemble the return spring A2143 in the lower cavity 2142 of the valve stem A, it does not have the power-off holding function. When power is off, the valve stem A214 automatically returns under the elastic force of the return spring A2143.

[0033] Preferably, an air-breaking gas outflow passage is provided in the air-breaking valve 22, and a replaceable positive-pressure gas outflow passage and a negative-pressure gas outflow passage are respectively provided in the vacuum valve 21. In this application, the meaning of "replaceable use" above is that when the vacuum valve 21 is working, the positive-pressure gas outflow passage and the negative-pressure gas outflow passage cannot be used simultaneously, and one of them needs to be blocked. Specifically, when the multifunctional valve assembly module provided in this application is applied to a vacuum generator, the negative-pressure gas outflow passage needs to be blocked. When the multifunctional valve assembly module provided in this application is applied to a vacuum pump, the positive-pressure gas outflow passage needs to be blocked.

[0034] Specifically, refer to Figure 7, the pneumatic control valve unit 2 is respectively provided with an A port 211, a B port 212, and a C port 213 corresponding to and cooperating with the vacuum valve 21, and a vacuum-breaking valve inlet 221 and a vacuum-breaking valve outlet 222 corresponding to and cooperating with the vacuum-breaking valve 22. A positive-pressure gas outflow channel is formed between the A port 211 and the C port 213, and a negative-pressure gas outflow channel is formed between the C port 213 and the B port 212. When the vacuum valve 21 operates, the positive-pressure gas outflow channel and the negative-pressure gas outflow channel cannot be connected simultaneously, and one of them needs to be blocked; a vacuum-breaking gas outflow channel is formed between the vacuum-breaking valve inlet 221 and the vacuum-breaking valve outlet 222. The control valve unit 1 is respectively provided with a pilot air inlet channel 13, a vacuum control air channel 14, and a vacuum-breaking control air channel 15. The inlet end of the pilot air inlet channel 13 is connected to the vacuum-breaking valve inlet 221, and the outlet end of the pilot air inlet channel 13 is respectively connected to the inlet ends of the vacuum pilot valve 12 and the vacuum-breaking pilot valve 11 for supplying air to the vacuum pilot valve 12 and the vacuum-breaking pilot valve 11. The outlet end of the vacuum pilot valve 12 is connected to the vacuum valve 21 through the vacuum control air channel 14, thereby controlling the movement of the valve stem A 214 in the vacuum valve 21. The movement of the valve stem A 214 further controls the on-off of the positive-pressure gas outflow channel or the negative-pressure gas outflow channel. The outlet end of the vacuum-breaking pilot valve 11 is connected to the vacuum-breaking valve 22 through the vacuum-breaking control air channel 15, thereby controlling the movement of the valve stem B 223 in the vacuum-breaking valve 22. The movement of the valve stem B 223 further controls the on-off of the vacuum-breaking gas outflow channel.

[0035] Specifically, the outlet end of the vacuum control air channel 14 is connected to the upper chamber 2141 of the valve stem A, the outlet end of the vacuum-breaking control air channel 15 is connected to the ventilation port 1631, and is respectively connected to the lower chamber 2142 of the valve stem A and the upper chamber 2231 of the valve stem B through the ventilation port 1631.

[0036] Specifically, referring to Figure 11 , the pneumatic control valve body 16 is respectively provided with a pilot air port A 164 connected to the upper chamber 2141 of the valve stem A, a pilot air port B 165 connected to the ventilation port 1631, and a confluence port 166. The vacuum-breaking valve inlet 221 is connected to the pilot air inlet channel 13 through the confluence port 166. The vacuum control air channel 14 is connected to the upper chamber 2141 of the valve stem A through the pilot air port A 164. The vacuum-breaking control air channel 15 is connected to the ventilation port 1631 through the pilot air port B 165.

[0037] A multi-functional valve assembly module described in the utility model can achieve multiple functions. For example, it can perform vacuum pumping and breaking vacuum operations and can be applied to vacuum generator systems and vacuum pump systems. It can not only pump vacuum from the system to reach the required vacuum degree but also quickly break the vacuum state when needed. The vacuum valve 21 and the vacuum-breaking valve 22 are arranged vertically, and the vacuum-breaking pilot valve 11 and the vacuum pilot valve 12 are arranged vertically, making the overall structure more compact, thus saving installation space and facilitating installation and subsequent maintenance work.

[0038] When the valve assembly module is used in a vacuum generator system, ports A 211 and C 213 are selected for use, and port B 212 is not used. Port A 211 and the vacuum-breaking valve inlet 221 are used as positive-pressure inlets to connect to a positive-pressure gas source, and port C 213 and the vacuum-breaking valve outlet 222 are used as positive-pressure outlets. The vacuum pilot valve 12 controls the opening and closing of the vacuum control air passage 14. When the vacuum control air passage 14 is opened, the valve stem A 214 moves downward, and the valve stem B 223 remains stationary. The vacuum-breaking valve 22 does not work, and the vacuum valve 21 works to control the opening of the positive-pressure gas outflow passage, and the gas enters the vacuum generator system to pump vacuum. The vacuum-breaking pilot valve 11 controls the opening and closing of the vacuum-breaking control air passage 15. When the vacuum-breaking control air passage 15 is opened, the valve stem A 214 moves upward, and the valve stem B 223 moves downward. The vacuum valve 21 does not work, and the vacuum-breaking valve 22 works to control the opening of the vacuum-breaking control air passage 15, and the gas enters the vacuum generator system to break the vacuum. When the vacuum-breaking control air passage 15 is closed, the valve stem B 223 resets under the action of the return spring B 2233.

[0039] When the valve assembly module is used in a vacuum pump system, ports B 212 and C 213 are selected for use, and port A 211 is not used. The vacuum-breaking valve inlet 221 is used as a positive-pressure inlet to connect to a positive-pressure gas source, the vacuum-breaking valve outlet 222 is used as a positive-pressure outlet, port C 213 is used as a negative-pressure inlet to connect to a negative-pressure gas source, and port B 212 is used as a negative-pressure outlet. The vacuum pilot valve 12 controls the opening and closing of the vacuum control air passage 14. When the vacuum control air passage 14 is opened, the valve stem A 214 moves downward, and the valve stem B 223 remains stationary. The vacuum-breaking valve 22 does not work, and the vacuum valve 21 works to control the opening of the negative-pressure gas outflow passage, and the negative-pressure gas flows out. The vacuum-breaking pilot valve 11 controls the opening and closing of the vacuum-breaking control air passage 15. When the vacuum-breaking control air passage 15 is opened, the valve stem A 214 moves upward, and the valve stem B 223 moves downward. The vacuum valve 21 does not work, and the vacuum-breaking valve 22 works to control the opening of the vacuum-breaking control air passage 15, and the gas enters the vacuum pump system to break the vacuum. When the vacuum-breaking control air passage 15 is closed, the valve stem B 223 resets under the action of the return spring B 2233.

[0040] Preferably, a first plug cap 161 is provided at the upper end of the pneumatic control valve body 16, and a second plug cap 162 is provided at the lower end of the pneumatic control valve body 16 to prevent external impurities from entering the pneumatic control valve body 16. Sealing rings are provided between the first plug cap 161 and the pneumatic control valve body 16, and between the second plug cap 162 and the pneumatic control valve body 16 to prevent gas leakage.

[0041] Preferably, in this embodiment, a first manual rod 1611 is provided on the first plug cap 161, and the lower end of the first manual rod 1611 extends into the upper cavity 2141 of the valve stem A to manually control the movement of the valve stem A214. Specifically, referring to Figure 9 - Figure 10 , the first manual rod 1611 includes an adjusting rod 16111 and a return spring C16112. An installation channel is provided in the first plug cap 161, and the adjusting rod 16111 is inserted into the installation channel. A convex column 16113 is provided at the lower end of the adjusting rod 16111, one end of the return spring C16112 is sleeved on the convex column 16113, and the other end of the return spring C16112 abuts against the valve stem A214. A limiting block 16114 extends upward from the bottom end surface of the adjusting rod 16111, and a limiting groove 1612 for limiting cooperation with the limiting block 16114 and an annular groove 1613 connected to the limiting groove 1612 are provided on the inner side wall of the installation channel.

[0042] During specific operation, the user presses the adjusting rod 16111, so that the adjusting rod 16111 moves downward against the elastic force of the return spring C16112, driving the limiting block 16114 to move downward out of the limiting groove 1612 and into the annular groove 1613. Then, the adjusting rod 16111 is rotated to drive the limiting block 16114 to slide in the annular groove 1613. The annular groove 1613 restricts the upward movement of the limiting block 16114 to play a locking role. When unlocking is required, the adjusting rod 16111 is rotated again so that the limiting block 16114 is aligned with the limiting groove 1612. Under the elastic force of the return spring C16112, the limiting block 16114 enters the limiting groove 1612, and the adjusting rod 16111 moves upward to reset.

[0043] Preferably, in this embodiment, a second manual rod 111 for manually controlling the operation of the air-breaking pilot valve 11 is provided on the air-breaking pilot valve 11.

[0044] For the specific structures of the vacuum pilot valve 12, the air-breaking pilot valve 11, and the second manual rod 111, reference can be made to an electromagnetic control valve disclosed in a Chinese patent application (publication number: CN110657276B). Since the basic structures / principles of the vacuum pilot valve 12, the air-breaking pilot valve 11, and the second manual rod 111 have been detailedly disclosed in the prior art, they will not be specifically described in this embodiment.

[0045] By setting the first manual lever 1611 and the second manual lever 111, both electric control and manual control can be achieved. In the case of insufficient power supply or failure, users can perform manual control operations to ensure the normal operation of the equipment. The dual control mode greatly improves the reliability and flexibility of the equipment.

[0046] Preferably, in this embodiment, the pneumatic control valve unit 2 and the control valve unit 1 are fixedly connected by an elastic pin 3 to ensure a stable connection between the two. A manifold gasket 4 is provided between the pneumatic control valve unit 2 and the control valve unit 1 to ensure the sealing performance between the two and prevent gas leakage.

[0047] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A multi-functional valve assembly module, comprising a control valve unit (1) and a pneumatically controlled valve unit (2) cooperatively connected with the control valve unit (1), characterized in that: The pneumatic control valve unit (2) includes a vacuum valve (21) and a vent valve (22). A vent gas outflow passage is provided in the vent valve (22), and a positive pressure gas outflow passage and a negative pressure gas outflow passage that can be used interchangeably are provided in the vacuum valve (21). The control valve unit (1) includes a vent pilot valve (11) and a vacuum pilot valve (12). A pilot air inlet passage (13), a vacuum control air passage (14), and a vent control air passage (15) are respectively provided in the control valve unit (1). The pilot air inlet passage (13) is respectively communicated with the air inlet ends of the vacuum pilot valve (12) and the vent pilot valve (11). The air outlet end of the vacuum pilot valve (12) is communicated with the vacuum valve (21) through the vacuum control air passage (14), thereby controlling the on / off of the positive pressure gas outflow passage or the negative pressure gas outflow passage. The air outlet end of the vent pilot valve (11) is communicated with the vent valve (22) through the vent control air passage (15), thereby controlling the on / off of the vent gas outflow passage.

2. The multifunctional valve assembly module according to claim 1, characterized in that: An A port (211), a B port (212), and a C port (213) corresponding to and cooperating with the vacuum valve (21), as well as a vent valve air inlet (221) and a vent valve air outlet (222) corresponding to and cooperating with the vent valve (22) are provided on the pneumatic control valve. The positive pressure gas outflow passage is formed between the A port (211) and the C port (213), the negative pressure gas outflow passage is formed between the C port (213) and the B port (212), the vent gas outflow passage is formed between the vent valve air inlet (221) and the vent valve air outlet (222), and the vent valve air inlet (221) is communicated with the air inlet end of the pilot air inlet passage (13).

3. A multifunctional valve assembly module according to claim 1, characterized in that: The vent pilot valve (11) and the vacuum pilot valve (12) are arranged vertically, with the vent pilot valve (11) disposed above the vacuum pilot valve (12). The vent valve (22) and the vacuum valve (21) are arranged vertically, with the vacuum valve (21) disposed above the vent valve (22).

4. A multifunctional valve assembly module according to claim 3, characterized in that: The pneumatic control valve unit (2) further includes a pneumatic control valve body (16). A partition plate (163) is provided in the pneumatic control valve body (16). The partition plate (163) divides the inner cavity of the pneumatic control valve body (16) into an upper installation cavity and a lower installation cavity. The vacuum valve (21) is fixedly arranged in the upper installation cavity, and the vent valve (22) is fixedly arranged in the lower installation cavity.

5. A multifunctional valve assembly module according to claim 3, characterized in that: The control valve unit (1) further includes a manifold plate (23). An accommodation space is provided in the manifold plate (23). A mounting plate (231) is provided in the manifold plate (23). The mounting plate (231) divides the accommodation space into an upper accommodation cavity and a lower accommodation cavity. The vent pilot valve (11) is fixedly arranged in the upper accommodation cavity, and the vacuum pilot valve (12) is fixedly arranged in the lower accommodation cavity.

6. A multifunctional valve assembly module according to claim 4, characterized in that: A valve stem A (214) is movably arranged inside the vacuum valve (21). There is an upper chamber of valve stem A (2141) between the upper end face of the valve stem A (214) and the pneumatic control valve body (16), and a lower chamber of valve stem A (2142) between the lower end face of the valve stem A (214) and the partition plate (163). A valve stem B (223) is movably arranged inside the air-breaking valve (22). There is an upper chamber of valve stem B (2231) between the upper end face of the valve stem B (223) and the partition plate (163), and a lower chamber of valve stem B (2232) between the lower end face of the valve stem B (223) and the pneumatic control valve body (16). The vacuum control air passage (14) is communicated with the upper chamber of valve stem A (2141), and the air-breaking control air passage (15) is respectively communicated with the lower chamber of valve stem A (2142) and the upper chamber of valve stem B (2231).

7. A multifunctional valve assembly module according to claim 6, characterized in that: A ventilation port (1631) is arranged on the partition plate (163). The ventilation port (1631) is respectively communicated with the lower chamber of valve stem A (2142) and the upper chamber of valve stem B (2231). The outlet end of the air-breaking control air passage (15) is communicated with the ventilation port (1631).

8. A multifunctional valve assembly module according to claim 4, characterized in that: A first plug cap (161) is arranged at the upper end of the pneumatic control valve body (16), and a second plug cap (162) is arranged at the lower end of the pneumatic control valve body (16). A first manual rod (1611) is arranged on the first plug cap (161). The lower end of the first manual rod (1611) extends into the upper installation cavity and cooperates with the vacuum valve (21) to control the air path switching of the vacuum valve (21).

9. A multifunctional valve assembly module according to claim 1, characterized in that: A second manual rod (111) is arranged on the air-breaking pilot valve (11). The second manual rod (111) is used to control the air path switching of the air-breaking pilot valve (11).

10. A multifunctional valve assembly module according to claim 1, characterized in that: Both the vacuum valve (21) and the air-breaking valve (22) are two-position two-way pneumatic control valves, and both the vacuum pilot valve (12) and the air-breaking pilot valve (11) are two-position three-way solenoid valves.

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