Control device of pneumatic valve

Abstract

The utility model discloses a control device of a pneumatic valve. The control device comprises an air source connector, an air path distribution assembly, a first switch assembly, a second switch assembly, a flow limiting assembly, a quick exhaust valve and an air cylinder. The gas path distribution assembly, the first switch assembly and the second switch assembly are both communicated with the gas source interface, and the first switch assembly and the second switch assembly are both communicated with the gas path distribution assembly; the flow limiting assembly is communicated with the gas path distribution assembly and the quick exhaust valve; the quick exhaust valve is communicated with a cylinder which is connected with a pneumatic valve to be controlled; when the second switch assembly starts an opening mode, the gas path distribution assembly discharges gas between the quick exhaust valve and the flow limiting assembly to the atmosphere; the quick exhaust valve exhausts gas in the air cylinder to the atmosphere, so that the air cylinder drives the to-be-controlled pneumatic valve to be switched to be in a closed state. Gas in the air cylinder can be rapidly exhausted to the atmosphere through the rapid exhaust valve, the function of rapidly closing the pneumatic valve is achieved, reliability is high, and cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve pneumatic control technical field, concretely relates to a control device of pneumatic valve. BACKGROUND

[0002] The important valve in nuclear power plant is basically pneumatic control, and basically has the requirement of opening and closing time in design. For example, the pneumatic valve arranged on the steam pipeline from the high pressure cylinder to the deaerator water tank provides steam for the deaerator water tank in the normal operation state of the unit, that is, the pneumatic valve needs to be in the normally open state; when the turbine is braked and the check valve appears internal leakage, in order to prevent the water and steam in the deaerator from returning to the high pressure cylinder, causing the high pressure cylinder to be flooded and the turbine to overspeed due to the return of steam to the high pressure cylinder, the pneumatic valve needs to be quickly closed. However, at present, the pneumatic valve is often closed overtime due to complex pipeline, and the reliability is not high, and the opening and closing time of the pneumatic valve does not meet the design requirements due to other factors such as pipeline characteristics. SUMMARY

[0003] The utility model provides a control device of pneumatic valve, aims at solving the problem of unable to quickly close the pneumatic valve in prior art.

[0004] In a first aspect, the utility model provides a control device of pneumatic valve, it includes: gas source interface, gas path distribution subassembly, first switch subassembly, second switch subassembly, flow limiting subassembly, quick exhaust valve and air cylinder, the gas path distribution subassembly, the first switch subassembly with the second switch subassembly all with the gas source interface intercommunication, the first switch subassembly with the first switch subassembly all with the gas path distribution subassembly intercommunication, the flow limiting subassembly with the gas path distribution subassembly and the quick exhaust valve intercommunication, the quick exhaust valve with the air cylinder intercommunication, the air cylinder is connected with the valve to be controlled, wherein, the gas path distribution subassembly is used to when the first switch subassembly starts opening mode, the gas that the gas source interface inputs is delivered to the flow limiting subassembly, the quick exhaust valve is used to when the first switch subassembly starts opening mode, the gas that flows through the flow limiting subassembly is delivered to the air cylinder, to make the air cylinder drive the valve to be controlled and switch for opening state, the gas path distribution subassembly is also used to when the second switch subassembly starts opening mode, the gas between the quick exhaust valve and the flow limiting subassembly is discharged to the atmosphere, the quick exhaust valve is also used to when the second switch subassembly starts opening mode, the gas in the air cylinder is discharged to the atmosphere, to make the air cylinder drive the valve to be controlled and switch for closing state.

[0005] In one technical solution, the rapid exhaust valve comprises a valve body and a slider arranged in the valve body; the valve body is provided with a first port, a second port and a third port; the first port of the valve body is in communication with the flow limiting assembly, the second port of the valve body is in communication with the cylinder, and the third port of the valve body is in communication with the atmosphere; wherein the slider is slidable in the valve body to make the second port of the valve body in communication with the first port or the third port of the valve body.

[0006] In one technical solution, the gas path distribution assembly comprises a first gas path distributor and a second gas path distributor; the first end of the first gas path distributor is in communication with the gas source interface, the second end of the first gas path distributor and the second end of the second gas path distributor are both in communication with the first switch assembly, the third end of the first gas path distributor is in communication with the first end of the second gas path distributor, the third end of the second gas path distributor is in communication with the flow limiting assembly, the fourth end of the first gas path distributor and the fourth end of the second gas path distributor are both in communication with the second switch assembly, and the fifth end of the first gas path distributor and the fifth end of the second gas path distributor are both in communication with the atmosphere.

[0007] In one technical solution, the gas path distribution assembly further comprises a first muffler and a second muffler; the first muffler is in communication with the fifth end of the first gas path distributor, and the second muffler is in communication with the fifth end of the second gas path distributor.

[0008] In one technical solution, the first switch assembly comprises a first electromagnetic valve and a second electromagnetic valve; one end of the first electromagnetic valve and one end of the second electromagnetic valve are both in communication with the gas source interface, the other end of the first electromagnetic valve is in communication with the second end of the first gas path distributor, and the other end of the second electromagnetic valve is in communication with the second end of the second gas path distributor.

[0009] In one technical solution, the second switch assembly comprises a third electromagnetic valve and a fourth electromagnetic valve; one end of the third electromagnetic valve and one end of the fourth electromagnetic valve are both in communication with the gas source interface, the other end of the third electromagnetic valve is in communication with the fourth end of the first gas path distributor, and the other end of the fourth electromagnetic valve is in communication with the fourth end of the second gas path distributor.

[0010] In one technical solution, the flow limiting assembly comprises a plurality of flow control valves, which are connected in series between the third end of the second gas path distributor and the rapid exhaust valve.

[0011] In one technical solution, the flow limiting component further comprises a first check valve, one end of the first check valve being in communication with the third end of the second gas path distributor, and the other end of the first check valve being in communication with the rapid exhaust valve.

[0012] In one technical solution, the control device of the pneumatic valve further comprises a filtering component, the gas path distribution component, the first switch component and the second switch component all being in communication with the gas source interface through the filtering component.

[0013] In one technical solution, the filtering component comprises an air filtering regulator and a second check valve, one end of the air filtering regulator being in communication with the gas source interface, the other end of the air filtering regulator being in communication with the second check valve, and the second check valve being in communication with the gas path distribution component, the first switch component and the second switch component.

[0014] Compared with the prior art, the control device of the pneumatic valve provided by the utility model, comprising a gas source interface, a gas path distribution component, a first switch component, a second switch component, a flow limiting component, a rapid exhaust valve and a cylinder, the gas path distribution component, the first switch component and the first switch component all being in communication with the gas source interface, the first switch component and the first switch component all being in communication with the gas path distribution component, the flow limiting component being in communication with the gas path distribution component and the rapid exhaust valve, the rapid exhaust valve being in communication with the cylinder, and the cylinder being connected with a to-be-controlled pneumatic valve, wherein when the second switch component starts the opening mode, the gas path distribution component discharges the gas between the rapid exhaust valve and the flow limiting component to the atmosphere, and the rapid exhaust valve discharges the gas in the cylinder to the atmosphere, so as to make the cylinder drive the to-be-controlled pneumatic valve to switch to the closed state. The utility model can discharge the gas in the cylinder to the atmosphere through the rapid exhaust valve, realize the function of rapidly closing the pneumatic valve, has high reliability, and is low in cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0016] Figure 1 The schematic block diagram of the control device of the pneumatic valve provided by one embodiment of the utility model is shown in the figure.

[0017] Figure 2 The schematic block diagram of the rapid exhaust valve provided by one embodiment of the utility model is shown in the figure.

[0018] Figure 3 The structural schematic diagram of the control device of the pneumatic valve provided by one embodiment of the utility model is shown in the figure.

[0019] Figure 4 The control device of the pneumatic valve is shown in the schematic block diagram.

[0020] In the drawings, reference numerals:

[0021] 1, gas source interface; 2, gas distribution assembly; 21, first gas distribution; 22, second gas distribution; 23, first muffler; 24, second muffler; 3, first switch assembly; 31, first electromagnetic valve; 32, second electromagnetic valve; 4, second switch assembly; 41, third electromagnetic valve; 42, fourth electromagnetic valve; 5, flow limiting assembly; 51, flow control valve; 52, first check valve; 6, quick exhaust valve; 61, air valve body; 611, first port; 612, second port; 613, third port; 62, slider; 7, air cylinder; 8, controlled pneumatic valve; 9, filter assembly; 91, air filter regulator; 92, second check valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] The direction terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only the directions of the attached drawings. Therefore, the direction terms used are used to illustrate and understand the present application, and are not used to limit the present application. In addition, in the drawings, structures with similar or identical structures are denoted by the same reference numerals.

[0024] It should be understood that when used in the present specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or collections thereof.

[0025] It should also be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0026] It should be further understood that the term "and / or" used in the description and claims of the utility model means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0027] Please refer to Figures 1 to 4 , Figure 1 The schematic block diagram of the control device of the pneumatic valve provided by an embodiment of the utility model is shown in the figure. Figure 2 The schematic block diagram of the quick exhaust valve provided by an embodiment of the utility model is shown in the figure.

[0028] Figure 3 The schematic structural diagram of the control device of the pneumatic valve provided by an embodiment of the utility model is shown in the figure. Figure 4 The schematic block diagram of the control device of the pneumatic valve provided by another embodiment of the utility model is shown in the figure.

[0029] The utility model provides a kind of control device of pneumatic valve, it includes: gas source interface 1, gas path distribution component 2, first switch component 3, second switch component 4, flow limiting component 5, quick exhaust valve 6 and cylinder 7;The gas path distribution component 2, the first switch component 3 and the second switch component 4 are all communicated with the gas source interface 1, the first switch component 3 and the first switch component 3 are all communicated with the gas path distribution component 2;The flow limiting component 5 is communicated with the gas path distribution component 2 and the quick exhaust valve 6;The quick exhaust valve 6 is communicated with the cylinder 7, and the cylinder 7 is connected with the controlled pneumatic valve 8.

[0030] Among them, the gas path distribution component 2 is used to transmit the gas input by the gas source interface 1 to the flow limiting component 5 when the first switch component 3 starts opening mode;The quick exhaust valve 6 is used to transmit the gas flowing through the flow limiting component 5 to the cylinder 7 when the first switch component 3 starts opening mode, so that the cylinder 7 drives the controlled pneumatic valve 8 to switch to open state.

[0031] The gas path distribution component 2 is also used to discharge the gas between the quick exhaust valve 6 and the flow limiting component 5 to atmosphere when the second switch component 4 starts opening mode;The quick exhaust valve 6 is also used to discharge the gas in the cylinder 7 to atmosphere when the second switch component 4 starts opening mode, so that the cylinder 7 drives the controlled pneumatic valve 8 to switch to closed state.

[0032] In the embodiment, please refer to Figure 1, the gas source interface 1, the first switch assembly 3 and the gas path distribution assembly 2 are in communication, the second switch assembly 4 is in communication with the gas source interface 1 and the gas path distribution assembly 2 respectively, and the flow limiting assembly 5 is in communication with the gas path distribution assembly 2 and the quick exhaust valve 6 respectively. When the first switch assembly 3 is started in the opening mode, the gas entering the inlet of the first switch assembly 3 is transmitted into the gas path distribution assembly 2, that is, the gas input by the gas source interface 1 enters the gas path distribution assembly 2 from the first switch assembly 3, so that the gas path distribution assembly 2 connects the gas source interface 1 and the flow limiting assembly 5 in communication, and then the gas input by the gas source interface 1 is transmitted to the flow limiting assembly 5 through the gas path distribution assembly 2. Then the flow limiting assembly 5 transmits the gas to the quick exhaust valve 6, when the gas flowing through the flow limiting assembly 5 enters the quick exhaust valve 6, the quick exhaust valve 6 connects the flow limiting assembly 5 and the gas cylinder 7 in communication, so that the gas input by the gas source interface 1 can enter the gas cylinder 7 through the gas path distribution assembly 2, the flow limiting assembly 5 and the quick exhaust valve 6 in turn, so that the gas cylinder 7 drives the controlled pneumatic valve 8 to switch from the closed state to the open state. In addition, after the controlled pneumatic valve 8 switches to the open state, the first switch assembly 3 can exit the opening mode, and the gas path distribution assembly 2 can still keep the gas source interface 1 and the flow limiting assembly 5 in communication.

[0033] When the second switch assembly 4 is started in the opening mode, the gas entering the inlet of the second switch assembly 4 is transmitted into the gas path distribution assembly 2, that is, the gas input by the gas source interface 1 enters the gas path distribution assembly 2 from the second switch assembly 4, so that the gas path distribution assembly 2 connects the flow limiting assembly 5 and the atmosphere in communication, and then the gas between the quick exhaust valve 6 and the flow limiting assembly 5 is discharged to the atmosphere through the gas path distribution assembly 2. After the gas between the quick exhaust valve 6 and the flow limiting assembly 5 is discharged to the atmosphere, the quick exhaust valve 6 connects the gas cylinder 7 and the atmosphere in communication, so that the gas in the gas cylinder 7 can be directly discharged to the atmosphere through the quick exhaust valve 6, and the gas cylinder 7 does not need to pass through a complex pipeline to discharge the gas in the gas cylinder 7 to the atmosphere, so that the controlled pneumatic valve 8 can be quickly switched from the open state to the closed state, realizing the function of quickly closing the pneumatic valve, having high reliability and low cost. In addition, after the controlled pneumatic valve 8 switches to the closed state, the second switch assembly 4 can exit the opening mode, and the gas path distribution assembly 2 can still keep the flow limiting assembly 5 and the atmosphere in communication.

[0034] In a more specific embodiment, the rapid exhaust valve 6 comprises a valve body 61 and a slider 62 arranged in the valve body 61; the valve body 61 is provided with a first port 611, a second port 612 and a third port 613; the first port 611 of the valve body 61 is in communication with the flow limiting assembly 5, the second port 612 of the valve body 61 is in communication with the cylinder 7, and the third port 613 of the valve body 61 is in communication with the atmosphere; wherein the slider 62 is slidable in the valve body 61 to make the second port 612 of the valve body 61 communicate with the first port 611 or the third port 613 of the valve body 61.

[0035] In this embodiment, referring to Figure 1 and Figure 2 , the rapid exhaust valve 6 is composed of a valve body 61 and a slider 62 arranged in the valve body 61, and the slider 62 is slidable in the valve body 61. Specifically, when the gas input by the gas source interface 1 enters the valve body 61 through the gas path distribution assembly 2, the flow limiting assembly 5 and the first port 611 of the valve body 61 in sequence, the first port 611 of the valve body 61 is filled with gas, which pushes the slider 62 inside the valve body 61 to the third port 613 of the valve body 61 when the first switch assembly 3 is in the opening mode. At this time, the slider 62 blocks the third port 613 of the valve body 61, so that the second port 612 of the valve body 61 communicates with the first port 611, and then the gas entering the first port 611 of the valve body 61 enters the cylinder 7 through the second port 612. When the second switch assembly 4 is in the opening mode, the gas path distribution assembly 2 discharges the gas between the first port 611 of the valve body 61 and the flow limiting assembly 5 to the atmosphere, so that the first port 611 of the valve body 61 loses gas, and then the slider 62 inside the valve body 61 is pushed to the first port 611 of the valve body 61 under the pressure in the cylinder 7. At this time, the slider 62 blocks the first port 611 of the valve body 61, so that the second port 612 of the valve body 61 communicates with the third port 613, and the gas in the cylinder 7 can be discharged to the atmosphere through the second port 612 and the third port 613 of the valve body 61, so that the cylinder 7 completes rapid exhaust.

[0036] In a more specific embodiment, the gas path distribution assembly 2 comprises a first gas path distributor 21 and a second gas path distributor 22; a first end of the first gas path distributor 21 is in communication with the gas source interface 1, a second end of the first gas path distributor 21 and a second end of the second gas path distributor 22 are both in communication with the first switch assembly 3, a third end of the first gas path distributor 21 is in communication with a first end of the second gas path distributor 22, a third end of the second gas path distributor 22 is in communication with the flow limiting assembly 5, a fourth end of the first gas path distributor 21 and a fourth end of the second gas path distributor 22 are both in communication with the second switch assembly 4, and a fifth end of the first gas path distributor 21 and a fifth end of the second gas path distributor 22 are both in communication with the atmosphere.

[0037] In the present embodiment, referring to Figure 3 , the gas path distribution assembly 2 comprises a first gas path distributor 21 and a second gas path distributor 22, the first gas path distributor 21 and the second gas path distributor 22 are both respectively provided with a first end, a second end, a third end, a fourth end and a fifth end, and the first gas path distributor 21 and the second gas path distributor 22 are both internally provided with a valve core. Specifically, when the first switch assembly 3 starts the opening mode, the first switch assembly 3 transmits the gas input by the gas source interface 1 to the second end of the first gas path distributor 21 and the second end of the second gas path distributor 22, the second end of the first gas path distributor 21 and the second end of the second gas path distributor 22 are gas-in, so that the valve core inside the first gas path distributor 21 and the second gas path distributor 22 moves downward, and then the first end of the first gas path distributor 21 is in communication with the third end thereof, and the first end of the second gas path distributor 22 is in communication with the third end thereof, so that the gas input by the gas source interface 1 enters the flow limiting assembly 5 through the first end and the third end of the first gas path distributor 21 and the first end and the third end of the second gas path distributor 22 in turn, the gas entering the flow limiting assembly 5 flows into the gas cylinder 7 through the quick exhaust valve 6, so that the gas cylinder 7 drives the controlled pneumatic valve 8 to switch from the closed state to the open state. And after the controlled pneumatic valve 8 switches to the open state, when the first switch assembly 3 exits the opening mode, the valve core inside the first gas path distributor 21 and the second gas path distributor 22 can keep the valve core at the current position by the friction force between the valve core and the inner wall, so that the first gas path distributor 21 and the second gas path distributor 22 can still keep the gas source interface 1 in communication with the flow limiting assembly 5.

[0038] When the second switch assembly 4 starts the opening mode, the second switch assembly 4 transmits the gas input by the gas source interface 1 to the fourth end of the first gas path distributor 21 and / or the fourth end of the second gas path distributor 22, the fourth end of the first gas path distributor 21 and / or the fourth end of the second gas path distributor 22 intakes the gas, so that the valve core inside the first gas path distributor 21 and / or the second gas path distributor 22 moves upward, and then the fifth end of the first gas path distributor 21 is communicated with the third end thereof, and / or the fifth end of the second gas path distributor 22 is communicated with the third end thereof, so that the gas between the rapid exhaust valve 6 and the flow limiting assembly 5 is discharged to the atmosphere through the fifth end of the first gas path distributor 21 and / or the fifth end of the second gas path distributor 22, and the port connected with the rapid exhaust valve 6 and the flow limiting assembly 5 loses the gas.

[0039] In a more specific embodiment, the gas path distribution assembly 2 further comprises a first muffler 23 and a second muffler 24; the first muffler 23 is communicated with the fifth end of the first gas path distributor 21, and the second muffler 24 is communicated with the fifth end of the second gas path distributor 22.

[0040] In the embodiment, referring to Figure 3 , the fifth end of the first gas path distributor 21 can be communicated with the atmosphere through the first muffler 23, and the fifth end of the second gas path distributor 22 can be communicated with the atmosphere through the second muffler 24, so that the gas flowing out of the fifth end of the first gas path distributor 21 is discharged to the atmosphere through the first muffler 23, and the gas flowing out of the fifth end of the second gas path distributor 22 is discharged to the atmosphere through the second muffler 24, thereby reducing the noise and ensuring the smooth exhaust.

[0041] In a more specific embodiment, the first switch assembly 3 comprises a first electromagnetic valve 31 and a second electromagnetic valve 32; one end of the first electromagnetic valve 31 and one end of the second electromagnetic valve 32 are communicated with the gas source interface 1, the other end of the first electromagnetic valve 31 is communicated with the second end of the first gas path distributor 21, and the other end of the second electromagnetic valve 32 is communicated with the second end of the second gas path distributor 22.

[0042] In the embodiment, referring to Figure 3When the first electromagnetic valve 31 is energized, the first electromagnetic valve 31 is opened, and the first electromagnetic valve 31 communicates the gas source interface 1 with the second end of the first gas path distributor 21; when the first electromagnetic valve 31 is de-energized, the first electromagnetic valve 31 is closed, and the first electromagnetic valve 31 cuts off the gas source interface 1 from the second end of the first gas path distributor 21. When the second electromagnetic valve 32 is energized, the second electromagnetic valve 32 is opened, and the second electromagnetic valve 32 communicates the gas source interface 1 with the second end of the second gas path distributor 22; when the second electromagnetic valve 32 is de-energized, the second electromagnetic valve 32 is closed, and the second electromagnetic valve 32 cuts off the gas source interface 1 from the second end of the second gas path distributor 22. Wherein, the first switch assembly 3 starting opening mode includes the first electromagnetic valve 31 and the second electromagnetic valve 32 being energized at the same time, that is, when the first electromagnetic valve 31 and the second electromagnetic valve 32 are energized at the same time, it means that the first switch assembly 3 starts the opening mode, which can prevent misoperation. When the first electromagnetic valve 31 and the second electromagnetic valve 32 are energized at the same time, the gas input by the gas source interface 1 is transmitted to the second end of the first gas path distributor 21 and the second end of the second gas path distributor 22 through the first electromagnetic valve 31 and the second electromagnetic valve 32 respectively.

[0043] In a more specific embodiment, the second switch assembly 4 includes a third electromagnetic valve 41 and a fourth electromagnetic valve 42; one end of the third electromagnetic valve 41 and one end of the fourth electromagnetic valve 42 are in communication with the gas source interface 1, the other end of the third electromagnetic valve 41 is in communication with the fourth end of the first gas path distributor 21, and the other end of the fourth electromagnetic valve 42 is in communication with the fourth end of the second gas path distributor 22.

[0044] In this embodiment, refer to Figure 3When the third electromagnetic valve 41 is energized, the third electromagnetic valve 41 is opened, and the third electromagnetic valve 41 communicates the gas source interface 1 with the fourth end of the first gas path distributor 21; when the third electromagnetic valve 41 is de-energized, the third electromagnetic valve 41 is closed, and the third electromagnetic valve 41 cuts off the gas source interface 1 from the fourth end of the first gas path distributor 21. When the fourth electromagnetic valve 42 is energized, the fourth electromagnetic valve 42 is opened, and the fourth electromagnetic valve 42 communicates the gas source interface 1 with the fourth end of the second gas path distributor 22; when the fourth electromagnetic valve 42 is de-energized, the fourth electromagnetic valve 42 is closed, and the fourth electromagnetic valve 42 cuts off the gas source interface 1 from the fourth end of the second gas path distributor 22. The starting opening mode of the second switch assembly 4 includes that the third electromagnetic valve 41 is energized and / or the fourth electromagnetic valve 42 is energized, that is, when any one of the third electromagnetic valve 41 and the fourth electromagnetic valve 42 is energized, or the third electromagnetic valve 41 and the fourth electromagnetic valve 42 are simultaneously energized, it means that the second switch assembly 4 starts the opening mode. Specifically, when the third electromagnetic valve 41 is energized and / or the fourth electromagnetic valve 42 is energized, the gas input by the gas source interface 1 is transmitted to the fourth end of the first gas path distributor 21 through the third electromagnetic valve 41 and / or to the fourth end of the second gas path distributor 22 through the fourth electromagnetic valve 42.

[0045] In a more specific embodiment, the flow limiting assembly 5 includes a plurality of flow control valves 51, which are connected in series between the third end of the second gas path distributor 22 and the quick exhaust valve 6.

[0046] In the embodiment, referring to Figure 3 A plurality of flow control valves 51 connected in series are arranged between the third end of the second gas path distributor 22 and the first port 611 of the gas valve body 61 in the quick exhaust valve 6, and the flow of the gas is controlled through the flow control valves 51. The number of the flow control valves 51 can be limited according to the actual application, which is not specifically limited here.

[0047] In a more specific embodiment, the flow limiting assembly 5 further includes a first check valve 52, one end of the first check valve 52 being communicated with the third end of the second gas path distributor 22, and the other end of the first check valve 52 being communicated with the quick exhaust valve 6.

[0048] In the embodiment, referring to Figure 3 A first check valve 52 is arranged between the third end of the second gas path distributor 22 and the first port 611 of the gas valve body 61 in the quick exhaust valve 6, that is, the two ends of the first check valve 52 are communicated with the two ends of a plurality of flow control valves 51 connected in series, so as to prevent backflow.

[0049] In a more specific embodiment, the control device of the pneumatic valve further comprises a filter assembly 9, and the air path distribution assembly 2, the first switch assembly 3 and the second switch assembly 4 are all communicated with the air source interface 1 through the filter assembly 9.

[0050] In the embodiment, referring to Figure 4 , one end of the filter assembly 9 is communicated with the air source interface 1, and the other end of the filter assembly 9 is communicated with the air path distribution assembly 2, the first switch assembly 3 and the second switch assembly 4. The filter assembly 9 is mainly used for filtering the gas input by the air source interface 1 to remove the pollutants in the gas.

[0051] In a more specific embodiment, the filter assembly 9 comprises an air filter regulator 91 and a second check valve 92, one end of the air filter regulator 91 is communicated with the air source interface 1, the other end of the air filter regulator 91 is communicated with the second check valve 92, and the second check valve 92 is communicated with the air path distribution assembly 2, the first switch assembly 3 and the second switch assembly 4.

[0052] In the embodiment, referring to Figure 3 and Figure 4 , the filter assembly 9 is composed of the air filter regulator 91 and the second check valve 92, one end of the air filter regulator 91 is communicated with the air source interface 1, and the other end of the air filter regulator 91 is communicated with the air path distribution assembly 2, the first switch assembly 3 and the second switch assembly 4 through the second check valve 92. Referring to Figure 2 , preferably, the second check valve 92 is specifically communicated with the first air path distributor 21 in the air path distribution assembly 2, the first electromagnetic valve 31 in the first switch assembly 3 and the third electromagnetic valve 41 in the second switch assembly 4. Among them, the air filter regulator 91 can filter the inflowing gas to remove the pollutants in the gas, and the second check valve 92 can prevent backflow.

[0053] The utility model provides a kind of control device of pneumatic valve, including gas source interface 1, gas path distribution assembly 2, first switch assembly 3, second switch assembly 4, flow limiting component 5, quick exhaust valve 6 and cylinder 7;Gas path distribution assembly 2, first switch assembly 3 and first switch assembly 3 are all communicated with gas source interface 1, and first switch assembly 3 and first switch assembly 3 are all communicated with gas path distribution assembly 2;Flow limiting component 5 is communicated with gas path distribution assembly 2 and quick exhaust valve 6;Quick exhaust valve 6 is communicated with cylinder 7, and cylinder 7 is connected with the to-be-controlled pneumatic valve 8;Wherein, when second switch assembly 4 starts opening mode, gas path distribution assembly 2 discharges gas between quick exhaust valve 6 and flow limiting component 5 to atmosphere;Quick exhaust valve 6 discharges gas in cylinder 7 to atmosphere, to make cylinder 7 drive to-be-controlled pneumatic valve 8 switch to closed state.The utility model can discharge gas in cylinder 7 to atmosphere by quick exhaust valve 6, realize the function of quick closing pneumatic valve, and reliability is high, and cost is low.

[0054] The above is only the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of claim.

Claims

1. A control device for a pneumatic valve, characterized in that The application relates to a pneumatic control device for a pneumatic valve. The pneumatic control device comprises a gas source interface, a gas path distribution assembly, a first switch assembly, a second switch assembly, a flow limiting assembly, a quick exhaust valve and a cylinder; the gas path distribution assembly, the first switch assembly and the second switch assembly are in communication with the gas source interface; the first switch assembly and the second switch assembly are in communication with the gas path distribution assembly; the flow limiting assembly is in communication with the gas path distribution assembly and the quick exhaust valve; the quick exhaust valve is in communication with the cylinder, and the cylinder is connected with a to-be-controlled pneumatic valve. The gas path distribution assembly is used for transmitting the gas input by the gas source interface to the flow limiting assembly when the first switch assembly is started in an opening mode; the quick exhaust valve is used for transmitting the gas flowing through the flow limiting assembly to the cylinder to drive the cylinder to switch the to-be-controlled pneumatic valve to an opening state when the first switch assembly is started in the opening mode. The gas path distribution assembly is also used for exhausting the gas between the quick exhaust valve and the flow limiting assembly to the atmosphere when the second switch assembly is started in an opening mode; the quick exhaust valve is also used for exhausting the gas in the cylinder to the atmosphere to drive the cylinder to switch the to-be-controlled pneumatic valve to a closing state when the second switch assembly is started in the opening mode.

2. The control device for a pneumatic valve according to claim 1, characterized in that, The quick exhaust valve comprises a valve body and a slider arranged in the valve body; the valve body is provided with a first port, a second port and a third port; the first port of the valve body is in communication with the flow limiting assembly, the second port of the valve body is in communication with the cylinder, and the third port of the valve body is in communication with the atmosphere; the slider can slide in the valve body to make the second port of the valve body in communication with the first port or the third port of the valve body.

3. The control device for a pneumatic valve according to claim 1, wherein The gas path distribution assembly comprises a first gas path distributor and a second gas path distributor; the first end of the first gas path distributor is in communication with the gas source interface, the second end of the first gas path distributor and the second end of the second gas path distributor are in communication with the first switch assembly, the third end of the first gas path distributor is in communication with the first end of the second gas path distributor, the third end of the second gas path distributor is in communication with the flow limiting assembly, the fourth end of the first gas path distributor and the fourth end of the second gas path distributor are in communication with the second switch assembly, and the fifth end of the first gas path distributor and the fifth end of the second gas path distributor are in communication with the atmosphere.

4. The control device for a pneumatic valve according to claim 3, wherein The gas path distribution assembly further comprises a first silencer and a second silencer; the first silencer is in communication with the fifth end of the first gas path distributor, and the second silencer is in communication with the fifth end of the second gas path distributor.

5. The control apparatus of a pneumatic valve according to claim 3, wherein The first switch assembly comprises a first electromagnetic valve and a second electromagnetic valve; one end of the first electromagnetic valve and one end of the second electromagnetic valve are in communication with the gas source interface, the other end of the first electromagnetic valve is in communication with the second end of the first gas path distributor, and the other end of the second electromagnetic valve is in communication with the second end of the second gas path distributor.

6. The control device for a pneumatic valve according to claim 5, wherein The second switch assembly comprises a third electromagnetic valve and a fourth electromagnetic valve; one end of the third electromagnetic valve and one end of the fourth electromagnetic valve are in communication with the gas source interface, the other end of the third electromagnetic valve is in communication with the fourth end of the first gas path distributor, and the other end of the fourth electromagnetic valve is in communication with the fourth end of the second gas path distributor.

7. The control device for a pneumatic valve according to claim 6, wherein The flow limiting assembly comprises a plurality of flow control valves, which are connected in series between the third end of the second gas path distributor and the rapid exhaust valve.

8. The control device for a pneumatic valve according to claim 7, wherein The flow limiting assembly further comprises a first check valve, one end of which is in communication with the third end of the second gas path distributor, and the other end of which is in communication with the rapid exhaust valve.

9. The device according to claim 1, wherein Further comprising a filter assembly, the gas path distribution assembly, the first switch assembly and the second switch assembly are all in communication with the gas source interface through the filter assembly.

10. The control device for a pneumatic valve according to claim 9, wherein The filter assembly comprises an air filter regulator and a second check valve, one end of the air filter regulator is in communication with the gas source interface, the other end of the air filter regulator is in communication with the second check valve, and the second check valve is in communication with the gas path distribution assembly, the first switch assembly and the second switch assembly.

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