Pneumatic valve feedback device and method, electronic equipment and storage medium

Abstract

The invention relates to a pneumatic valve feedback device and method, electronic equipment and a storage medium, the pneumatic valve feedback device comprises a valve, the two ends of the valve are provided with a first air inlet and a second air inlet respectively, a valve rod is arranged in the valve, and the first air inlet and the second air inlet are both connected to an air source; the first switching valve is provided with a port A, a port R and a port P, a movable rod is arranged in the first switching valve, the port P is connected to the air source, the port A is connected to the first pressure switch, and the movable rod is connected to the valve rod. A travel switch element of a pneumatic valve taking a travel switch as a feedback device on site is changed into a pneumatic element similar to a mechanical manual electromagnetic valve, an air source corresponding to a switch instruction is taken as an air inlet source of the pneumatic element, and then an air signal output by the pneumatic element is led to a pressure switch in a control cabinet; an electric signal of the pressure switch is used as a feedback signal of the valve, the pressure switch can be arranged in a control cabinet with a good environment, the environment adaptability is high, and the sealing performance is good.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment, and in particular to a pneumatic valve feedback device, method, electronic device, and storage medium. Background Technology

[0002] Currently, in the field of industrial automation, many ash silos, powder silos, slag silos, and silo pumps are equipped with pneumatic valves for remote automatic control. The feedback devices for these valves are basically low-current limit switches. However, the environment at powder silos and silo pumps is prone to severe dust accumulation and dampness on these limit switches.

[0003] This situation causes great inconvenience in daily inspection and maintenance, with two main risks: First, the limit switches are heavily dusty, which can easily send false signals and fail to correctly display the valve's open / closed status, posing a significant threat to process automation control and on-site safety. Second, the humid environment can accelerate the aging and corrosion of electronic equipment or cause water ingress, resulting in short circuits, grounding damage, and burnout of PLC or DCS control boards, thus increasing equipment losses. Summary of the Invention

[0004] This invention provides a pneumatic valve feedback device, method, electronic device, and storage medium to solve the problems in related technologies, such as severe dust accumulation in limit switches, easy signal mis-transmission, and easy aging, corrosion, or water ingress of electronic devices.

[0005] In a first aspect, a pneumatic valve feedback device is provided, comprising: a valve having a first air inlet and a second air inlet at its two ends, and a valve stem inside, wherein the first air inlet and the second air inlet are both connected to an air source; and a first switching valve having an A port, an R port and a P port, and a movable rod inside, wherein the P port is connected to the air source, the A port is connected to a first pressure switch, and the movable rod is connected to the valve stem.

[0006] In some embodiments, the pneumatic valve feedback device further includes a first three-way valve, wherein a first end of the first three-way valve is connected to the first air inlet, a second end is connected to the air source, and a third end is connected to the first switching valve.

[0007] In some embodiments, the pneumatic valve feedback device further includes a second switching valve having an A port, an R port, and a P port, wherein the P port is connected to the air source and the A port is connected to a second pressure switch.

[0008] In some embodiments, the pneumatic valve feedback device further includes a second three-way valve, wherein the first end of the second three-way valve is connected to the second air inlet, the second end is connected to the air source, and the third end is connected to the second switching valve.

[0009] In some embodiments, the air source is connected to a solenoid valve, which is connected to the first air inlet and the second air inlet.

[0010] In some embodiments, both the first pressure switch and the second pressure switch are installed in a control cabinet.

[0011] Secondly, a method using the aforementioned pneumatic valve feedback device is provided, comprising the following steps: controlling the air source to enter through the first air inlet to open the valve, and driving the valve stem to move; using the valve stem to drive the movable rod to move to open the first switching valve, so that the P port and the A port are connected, and the gas is delivered to the first pressure switch.

[0012] In some embodiments, the air source is controlled to enter through the second air inlet to close the valve and drive the valve stem to move; the valve stem is used to drive the movable rod to move to close the first switching valve, thereby shutting off the P port.

[0013] Thirdly, an electronic device is provided, including a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements any of the methods described above.

[0014] Fourthly, a storage medium is provided on which a program is stored, which, when executed by an electronic device, implements any of the methods described above.

[0015] The beneficial effects of the technical solution provided by this invention include:

[0016] This invention provides a pneumatic valve feedback device, method, electronic device, and storage medium. By replacing the limit switch element of the pneumatic valve, which uses a limit switch as the feedback device in the field, with a pneumatic element similar to a mechanical manual solenoid valve, the air source corresponding to the switch command is used as the air source for the pneumatic element. The air signal output by this pneumatic element is then led to a pressure switch in the control cabinet. The electrical signal of the pressure switch is used as the feedback signal for the valve. The pressure switch can be placed in a control cabinet with a good environment, has strong environmental adaptability, good sealing performance, is not easy for dust to enter, requires little maintenance, and has high reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the overall structure of the pneumatic valve feedback device provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the switching valve provided in an embodiment of the present invention.

[0020] Numbering on the map:

[0021] 1. Valve; 11. First air inlet; 12. Second air inlet; 13. Valve stem; 2. First switching valve; 21. Movable rod; 3. First three-way valve; 4. Second switching valve; 5. Second three-way valve. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides a pneumatic valve feedback device, method, electronic device, and storage medium, which can solve the problems of severe dust accumulation in limit switches, easy false signal transmission, and easy aging, corrosion, or water ingress in electronic devices in related technologies.

[0024] See Figure 1 and Figure 2 As shown, a pneumatic valve feedback device provided in an embodiment of the present invention may include: a valve 1, which has a first air inlet 11 and a second air inlet 12 at its two ends, and a valve stem 13 inside, wherein the first air inlet 11 and the second air inlet 12 are both connected to an air source; a first switching valve 2, which has an A port, an R port and a P port, and a movable rod 21 inside, wherein the P port is connected to the air source, the A port is connected to a first pressure switch, and the movable rod 21 is connected to the valve stem 13. In this embodiment, the limit switch element of the pneumatic valve with the limit switch as the feedback device is replaced with a pneumatic element similar to a mechanical manual solenoid valve (purely mechanical: good sealing performance, no water or dust ingress). The air source corresponding to the switch command is taken as the air source of valve 1, and the air signal output by valve 1 is led to the first pressure switch in the control cabinet. It is far away from the open air and high dust environment. The electrical signal of the first pressure switch is used as the feedback signal of valve 1. It has strong environmental adaptability, low maintenance, and high reliability. Since the feedback signal is taken from the pressure switch, the pressure switch can be placed in a control cabinet with a better environment. Moreover, the pressure signal output by the pressure switch is a combination of the command signal output by the solenoid valve and the action signal of the valve on site. Both are indispensable, which further improves its reliability.

[0025] The switching valve operates as follows: Port P is connected to the air source. When the valve is open, PA is open, and the air source is output to the downstream actuator via PA. When the valve is closed, Port P is closed, the air source is not released, and the air in the actuator is released via AR, allowing the actuator to reset.

[0026] See Figure 1 As shown, in some embodiments, the pneumatic valve feedback device may further include a first three-way valve 3, with its first end connected to the first air inlet 11, its second end connected to the air source, and its third end connected to the first switching valve 2. In this embodiment, by connecting a three-way valve to the first air inlet 11 of the valve cylinder, it is convenient to control the air source gas to enter the valve 1 from the first air inlet 11 and also enter the first switching valve 2, shortening the air intake path and saving costs.

[0027] See Figure 1 and Figure 2 As shown, in some embodiments, the pneumatic valve feedback device further includes a second switching valve 4, which has an A port, an R port, and a P port. The P port is connected to the air source, and the A port is connected to the second pressure switch. In this embodiment, the air source corresponding to the switch command is used as the air intake source for valve 1, and the output air signal is led to the second pressure switch in the control cabinet. The electrical signal of the second pressure switch is used as the feedback signal for valve 1. The pressure switch can be placed in a control cabinet with a good environment, has strong environmental adaptability, good sealing, is not easy for dust to enter, requires little maintenance, and has high reliability.

[0028] See Figure 1 As shown, in some embodiments, the pneumatic valve feedback device further includes a second three-way valve 5, wherein the first end of the second three-way valve 5 is connected to the second air inlet 12, the second end is connected to the air source, and the third end is connected to the second switching valve 4. In this embodiment, by connecting a three-way valve to the second air inlet 12 of the valve cylinder, it is convenient to control the air source gas to enter the valve 1 from the second air inlet 12 and also enter the second switching valve 4, shortening the air intake path and saving costs.

[0029] See Figure 1 As shown, in some embodiments, the gas source is connected to a solenoid valve, which is connected to the first air inlet 11 and the second air inlet 12. In this embodiment, the solenoid valve can control the gas from the gas source to enter the first air inlet 11 and the second air inlet 12, making control convenient and saving time and effort.

[0030] See Figure 1As shown, in some embodiments, both the first pressure switch and the second pressure switch are installed in a control cabinet. In this embodiment, by placing both the first pressure switch and the second pressure switch in a control cabinet, they can be kept away from open-air, high-dust environments. The electrical signal of the pressure switch is used as the feedback signal of the valve, resulting in strong environmental adaptability, good sealing, and preventing dust from easily entering.

[0031] See Figure 1 As shown, this embodiment of the invention also provides a method using the above-mentioned pneumatic valve feedback device, which includes the following steps: controlling the air source to enter through the first air inlet 11 to open the valve 1, and driving the valve stem 13 to move; using the valve stem 13 to drive the movable rod 21 to move to open the first switching valve 2, so that the P port and the A port are connected, and the gas is delivered to the first pressure switch. The method further includes: controlling the air source to enter through the second air inlet 12 to close the valve 1, and driving the valve stem 13 to move; using the valve stem 13 to drive the movable rod 21 to move to close the first switching valve 2, so that the P port is cut off. In this embodiment, the air source corresponding to the switch command is used as the air source for the pneumatic component, and the air signal output by this pneumatic component is led to the pressure switch in the control cabinet. The electrical signal of the pressure switch is used as the feedback signal of the valve. The pressure switch can be placed in a control cabinet with a good environment, with strong environmental adaptability, good sealing, and dust is not easy to enter. It requires little maintenance and has high reliability.

[0032] This invention also provides an electronic device, including a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements any of the methods described above. The electronic device may also implement any of the embodiments of the pneumatic valve feedback device or method described above, which will not be elaborated upon here.

[0033] This invention also provides a storage medium storing a program that, when executed by an electronic device, implements any of the methods described above. The storage medium can also implement any of the embodiments of the pneumatic valve feedback device or method described above, which will not be elaborated further here.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0035] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pneumatic valve feedback device, characterized in that, It includes: The valve (1) has a first air inlet (11) and a second air inlet (12) at its two ends, and a valve stem (13) is provided inside. The first air inlet (11) and the second air inlet (12) are both connected to the air source. The first switching valve (2) has an A port, an R port and a P port, and an internal movable rod (21). The P port is connected to the air source, the A port is connected to the first pressure switch, and the movable rod (21) is connected to the valve stem (13).

2. The pneumatic valve feedback device as described in claim 1, characterized in that: The pneumatic valve feedback device further includes a first three-way valve (3), the first end of which is connected to the first air inlet (11), the second end of which is connected to the air source, and the third end of which is connected to the first switching valve (2).

3. The pneumatic valve feedback device as described in claim 1, characterized in that: The pneumatic valve feedback device further includes a second switching valve (4), which has an A port, an R port and a P port. The P port is connected to the air source and the A port is connected to the second pressure switch.

4. The pneumatic valve feedback device as described in claim 3, characterized in that: The pneumatic valve feedback device also includes a second three-way valve (5), wherein the first end of the second three-way valve (5) is connected to the second air inlet (12), the second end is connected to the air source, and the third end is connected to the second switching valve (4).

5. The pneumatic valve feedback device as described in claim 3, characterized in that: The air source is connected to a solenoid valve, which is connected to the first air inlet (11) and the second air inlet (12).

6. The pneumatic valve feedback device as described in claim 3, characterized in that: Both the first pressure switch and the second pressure switch are installed in the control cabinet.

7. A method using the pneumatic valve feedback device according to claim 1, characterized in that, It includes the following steps: The air source is controlled to enter through the first air inlet (11) to open the valve (1) and drive the valve stem (13) to move; The valve stem (13) drives the movable rod (21) to move to open the first switching valve (2), so that the P port and the A port are connected and the gas is delivered to the first pressure switch.

8. The method as described in claim 7, characterized in that, Also includes: The air source is controlled to enter through the second air inlet (12) to close the valve (1) and drive the valve stem (13) to move; The valve stem (13) is used to drive the movable rod (21) to move to close the first switching valve (2), thereby shutting off the P port.

9. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method as described in any one of claims 7 or 8.

10. A storage medium having a program stored thereon, characterized in that, When the program is executed by an electronic device, it implements the method as described in any one of claims 7 or 8.

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