Pneumatic valve feedback device

Abstract

The utility model relates to a pneumatic valve feedback device which comprises a valve, a first air inlet and a second air inlet are formed in the two ends of the valve 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] The utility model relates to the field of industrial equipment, in particular to a pneumatic valve feedback device. Background Art

[0002] At present, in the field of industrial automation, many ash silos, powder silo tanks, slag silos, silo pumps, etc. are equipped with pneumatic valves to participate in remote automatic control, and the valve feedback device basically uses a small current travel switch (also known as a limit switch). However, the environment of powder silos, silo pumps, etc. is prone to serious dust accumulation and humidity on the travel switch.

[0003] This situation has caused great inconvenience in the daily inspection and maintenance process. There are two main risks: first, the travel switch is seriously covered with dust, which is easy to send wrong signals and cannot correctly display the switch status of the valve, posing a great hidden danger to process automatic control and on-site safety; second, the humid environment on site can easily accelerate the aging and rust of electronic equipment or water ingress, causing circuit short circuits, grounding and burning of PLC or DCS control boards, expanding equipment losses. Utility Model Content

[0004] The embodiment of the utility model provides a pneumatic valve feedback device to solve the problems in the related art that the travel switch is seriously dusty and easily sends wrong signals, and the electronic equipment is easily aged, corroded or water-infiltrated.

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

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

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

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

[0011] In the second aspect, a method for utilizing the above-mentioned pneumatic valve feedback device is provided, which comprises the following steps: controlling the gas source to intake air through the first air inlet to open the valve, and driving the valve stem to move; utilizing 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 supplied to the first pressure switch.

[0012] In some embodiments, the gas source is controlled to inlet gas through the second gas 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, so that the P port is cut off.

[0013] The beneficial effects brought by the technical solution provided by the utility model include:

[0014] The embodiment of the utility model provides a pneumatic valve feedback device. Since the travel switch element of the pneumatic valve that uses a travel switch as a feedback device on site is changed into a pneumatic element similar to a mechanical manual solenoid valve, the air source corresponding to the switch instruction is taken as the air inlet source of the pneumatic element, and the air signal output by the pneumatic element is then led to the pressure switch in the control cabinet, and 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 better environment, has strong environmental adaptability, good sealing, dust is not easy to enter, small maintenance, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the overall structure of a pneumatic valve feedback device provided by an embodiment of the utility model;

[0017] Figure 2 A schematic structural diagram of a switching valve provided in an embodiment of the utility model.

[0018] Numbers in the figure:

[0019] 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 DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The embodiments of the utility model provide a pneumatic valve feedback device, method, electronic equipment and storage medium, which can solve the problems in the related art that the travel switch is seriously dusty and easily sends wrong signals, and the electronic equipment is easily aged, corroded or water infiltrated.

[0022] See also Figure 1 and Figure 2 As shown, a pneumatic valve feedback device provided by an embodiment of the utility model may include: a valve 1, having a first air inlet 11 and a second air inlet 12 at both ends thereof, a valve stem 13 being arranged inside, the first air inlet 11 and the second air inlet 12 being both connected to an air source; a first switching valve 2, having an A port, an R port and a P port, a movable rod 21 being arranged inside, the P port being connected to the air source, the A port being connected to a first pressure switch, and the movable rod 21 being connected to the valve stem 13. In this embodiment, the travel switch element of the pneumatic valve that uses a travel switch as a feedback device on site is changed into a pneumatic element similar to a mechanical manual solenoid valve (pure mechanical: good sealing, no water or dust ingress), the air source corresponding to the switch instruction is taken as the air inlet source of valve 1, and the air signal output by valve 1 is led to the first pressure switch in the control cabinet, away from open air and high dust environment, and 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. Because the feedback signal is taken from the pressure switch, the pressure switch can be placed in a control cabinet with a better environment, and the pressure signal output by the pressure switch is derived from the comprehensive result of the command signal output by the solenoid valve and the on-site valve action signal, both of which are indispensable, thereby further improving its reliability.

[0023] Among them, the principle of the switching valve is: the P port is connected to the air source, when the valve is in the open state, PA is connected, and the air from the air source is output to the subsequent actuator through PA; when the valve is turned to the closed state, the P port is cut off, the air from the air source will not be discharged, and at the same time, the air in the actuator is discharged through AR to reset the actuator.

[0024] See also Figure 1 As shown, in some embodiments, the pneumatic valve feedback device may further include a first three-way valve 3, wherein a first end of the first three-way valve 3 is connected to the first air inlet 11, a second end is connected to the air source, and a third end is 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 while also entering the first switching valve 2, thereby shortening the air intake distance and saving costs.

[0025] See also Figure 1 and Figure 2 As shown, in some embodiments, the pneumatic valve feedback device further includes a second switching valve 4, the second switching valve 4 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, by taking the air source corresponding to the switch instruction as the air inlet source of the valve 1, and then leading the output air signal to the second pressure switch in the control cabinet, and using the electrical signal of the second pressure switch as the feedback signal of the valve 1, the pressure switch can be placed in a control cabinet with a better environment, has strong environmental adaptability, good sealing, dust is not easy to enter, small maintenance, and high reliability.

[0026] See also 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, thereby shortening the air intake distance and saving costs.

[0027] See also Figure 1 As shown, in some embodiments, the gas source is connected to a solenoid valve, and the solenoid valve is connected to the first air inlet 11 and the second air inlet 12. In this embodiment, the gas of the gas source can be controlled to enter the first air inlet 11 and the second air inlet 12 through the solenoid valve, which is convenient to control and saves time and effort.

[0028] See also Figure 1 As shown, in some embodiments, the first pressure switch and the second pressure switch are both installed in a control cabinet. In this embodiment, by setting the first pressure switch and the second pressure switch in the control cabinet, they can be kept away from open air and high dust environments, and the electrical signal of the pressure switch is used as the feedback signal of the valve, which has strong environmental adaptability, good sealing, and dust is not easy to enter.

[0029] See also Figure 1As shown, the embodiment of the utility model also provides a method for using the above-mentioned pneumatic valve feedback device, which includes the following steps: controlling the gas source to enter the first air inlet 11 to open the valve 1, and drive 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 transmitted to the first pressure switch. The method also includes: controlling the gas source to enter the second air inlet 12 to close the valve 1, and drive 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, by taking the gas source corresponding to the switch instruction as the air inlet source of the pneumatic component, and then leading the gas signal output by the pneumatic component to the pressure switch in the control cabinet, the electrical signal of the pressure switch is used as the feedback signal of the valve, and the pressure switch can be placed in a control cabinet with a better environment, with strong environmental adaptability, good sealing, dust is not easy to enter, small maintenance, and high reliability.

[0030] The embodiment of the utility model further provides an electronic device, including a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor implements any of the above methods when executing the program. The electronic device can also implement any of the embodiments of the above pneumatic valve feedback device or method, which will not be described in detail here.

[0031] The present invention also provides a storage medium on which a program is stored, and when the program is executed by an electronic device, any of the above methods is implemented. The storage medium can also implement any of the above embodiments of the pneumatic valve feedback device or method, which will not be described in detail here.

[0032] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0033] It should be noted that, in the present utility model, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A pneumatic valve feedback device, characterized in that: It includes: A valve (1) having a first air inlet (11) and a second air inlet (12) at two ends thereof, a valve stem (13) being arranged inside, and the first air inlet (11) and the second air inlet (12) are both connected to an air source; The first switching valve (2) has an A port, an R port and a P port, and is provided with a movable rod (21) inside, the P port is connected to the gas 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 according to claim 1, characterized in that: The pneumatic valve feedback device also includes a first three-way valve (3), wherein a first end of the first three-way valve (3) is connected to the first air inlet (11), a second end is connected to the air source, and a third end is connected to the first switching valve (2).

3. The pneumatic valve feedback device according to claim 1, characterized in that: The pneumatic valve feedback device further comprises a second switching valve (4), wherein the second switching valve (4) has 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.

4. The pneumatic valve feedback device according to 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 according to claim 3, characterized in that: The gas source is connected to a solenoid valve, and the solenoid valve is connected to the first gas inlet (11) and the second gas inlet (12).

6. The pneumatic valve feedback device according to claim 3, characterized in that: The first pressure switch and the second pressure switch are both installed in a control cabinet.

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