Actuator with valve position feedback

Abstract

The utility model relates to the technical field of sliding plate valve actuators, in particular to an actuator with a valve position feedback function, which comprises an air cylinder body with an inner cavity, a piston is arranged in the inner cavity, a piston rod is arranged on the piston, one end of the piston rod penetrates through the air cylinder body and extends parallel to the length direction of the air cylinder body, and the other end of the piston rod is provided with a valve position feedback function. The piston rod is provided with an insertion hole extending from the end close to one end of the piston to the end away from the piston, and the insertion hole is provided with a magnetic ring. An induction probe is arranged at the end, away from the extending direction of the piston rod, of the air cylinder body, and the induction probe extends into the inner cavity, penetrates through the magnetic ring and is inserted into the insertion hole. The actuator with the valve position feedback function can automatically monitor the operation health state of a valve with the actuator, and when the position of the magnetic ring is sensed and judged to be abnormal according to the sensing probe in the detection process, a worker can be reminded to maintain the valve in time.

Description

Technical Field

[0001] The utility model relates to the technical field of slide valve actuators, in particular to an actuator with valve position feedback. Background Art

[0002] A pneumatic actuator (actuator) is an actuator that uses air pressure to drive the opening, closing or regulating of a valve. It is also called a pneumatic actuator or pneumatic device. It can drive the piston rod through the piston to drive the valve stem up and down to close or open the valve.

[0003] The current problem is that some slide valves are used in systems for conveying solid-liquid mixed media. During long-term use, the solid particle components in the medium will erode the valve. In this case, the solid particle part of the medium will affect the stroke of the slide (valve plate), which may easily lead to the valve not being opened or closed properly.

[0004] For example, the wear-resistant black water valve disclosed in publication number CN114635985A can cause the aforementioned problem if excessive solid particulate matter seeps into the valve cavity and is not cleaned. However, typical pneumatic actuators only have limit position detection for upper and lower travel limits, and this detection has a certain error range. Therefore, if the slide is slightly blocked, the limit position detection method cannot effectively identify it. At the same time, if a serious blockage occurs, the limit position detection method can detect the blockage fault, but it cannot determine the specific impact of the blockage on the slide travel. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of the background technology and propose an actuator with valve position feedback.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An actuator with valve position feedback includes a cylinder body with an inner cavity, a piston is arranged in the inner cavity, a piston rod is arranged on the piston, one end of the piston rod passes through the cylinder body and extends parallel to the length direction of the cylinder body, the piston rod is provided with a socket extending from the end close to the piston end toward the end away from the piston, and a magnetic ring is provided on the socket; an induction probe is provided on the end of the cylinder body away from the extension direction of the piston rod, and the induction probe extends to the inner cavity, passes through the magnetic ring and is inserted into the socket.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the end of the piston rod close to the piston direction end is provided with an embedding groove coaxial with the socket, the magnetic ring is fixedly embedded in the embedding groove, and the center hole of the magnetic ring is coaxial with the socket.

[0009] On the basis of the above solution and as a preferred solution of the above solution: the cross section of the inner cavity is circular; the piston rod is coaxial with the piston; the socket is coaxial with the piston rod, and the sensing probe is coaxial with the socket.

[0010] On the basis of the above solution and as a preferred solution of the above solution: detection switches for monitoring the upper and lower limit positions of the piston are respectively provided at both ends of the cylinder body in the length direction.

[0011] On the basis of the above solution and as a preferred solution of the above solution: a connecting seat for connecting to a slide valve is provided on the cylinder body at one end of the piston rod extending out of the cylinder body.

[0012] The utility model has the following beneficial effects:

[0013] The actuator with valve position feedback of the utility model cooperates with the sensing probe and the magnetic ring. During operation, the sensing probe senses and determines the position of the magnetic ring and the piston stroke, and then determines whether the opening or closing of the valve using the actuator slide is in place, and determines whether a jam occurs. If a jam occurs, the sensing probe senses and determines the position of the magnetic ring, and then the specific degree of impact on the valve slide can be read.

[0014] The actuator with valve position feedback of the utility model can automatically monitor the operating health status of the valve to which the actuator is applied. When the induction probe senses and determines that the position of the magnetic ring is abnormal during the detection process, it can remind the staff to maintain the valve in time.

[0015] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an actuator with valve position feedback according to the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] See Figure 1The utility model discloses an actuator with valve position feedback. The actuator with valve position feedback includes a cylinder body 100 with an inner cavity 101. The cylinder includes an end cover 102, an end cover 103 and a body 104. The body 104 is cylindrical. The end cover 102 and the end cover 103 are respectively arranged at both ends of the body 104 and close the end of the body 104. The end cover 102 and the end cover 103 are fixed by a screw 105 and a nut 106. The end cover 102 and the end cover 103 are respectively provided with an air inlet hole to drive the piston 200. The piston 200 is arranged at the end cover 102 and the end cover 103. In the inner cavity 101 surrounded by the second 103 and the main body 104, a piston 200 rod is provided on the piston 200, and one end of the piston 200 rod passes through the cylinder body 100 and extends parallel to the length direction of the cylinder body 100. The piston 200 rod is provided with a socket 301 extending from the end close to the piston 200 to the end away from the piston 200, and a magnetic ring 400 is provided on the socket 301; an induction probe 500 is provided on the end of the cylinder body 100 away from the extension direction of the piston 200 rod, and the induction probe 500 extends to the inner cavity 101, passes through the magnetic ring 400 and is inserted into the socket 301.

[0019] The actuator with valve position feedback of the present invention cooperates with the sensing probe 500 and the magnetic ring 400. During operation, the sensing probe 500 senses and determines the position of the magnetic ring 400, determines the stroke of the piston 200, and then determines whether the opening or closing of the valve 800 using the actuator slide is in place, and determines whether a jam occurs. If a jam occurs, the sensing probe 500 senses and determines the position of the magnetic ring 400, and then the specific degree of impact on the valve slide can be read.

[0020] The working principle of sensing and determining the position of the magnetic ring 400 by the sensing probe 500 can be referred to the utility model patent technology of a split magnetostrictive displacement sensor disclosed in the patent publication number CN202793303U.

[0021] The actuator with valve position feedback of the present invention can automatically monitor the operating health status of the valve to which the actuator is applied, and the monitoring data is specifically connected to the corresponding alarm system. When the sensing probe 500 senses and determines that the position of the magnetic ring 400 is abnormal during the detection process, the alarm system can remind the staff to maintain the valve in time.

[0022] like Figure 1 As shown, a groove 302 coaxial with the socket 301 is provided at the end of the piston 200 rod close to one end of the piston 200 , and the magnetic ring 400 is fixedly embedded in the groove 302 , and the center hole of the magnetic ring 400 is coaxial with the socket 301 .

[0023] In order to avoid interference caused by the deflection of the piston 200 rod resulting in the socket 301 and the sensing probe 500 being out of coaxiality, the cross-section of the inner cavity 101 is circular; the piston 200 rod is coaxial with the piston 200; the socket 301 is coaxial with the piston 200 rod, and the sensing probe 500 is coaxial with the socket 301.

[0024] Furthermore, at both ends of the length direction of the cylinder body 100, there are respectively provided upper and lower limit position detection switches 600 for monitoring the piston 200. The position detection switches 600 assist in determining the upper and lower limit positions of the piston 200.

[0025] In order to facilitate the installation of the actuator, a connecting seat 700 for connecting to a corresponding slide valve 800 may be specially provided on the cylinder body 100 at one end of the piston 200 extending out of the cylinder body 100 .

[0026] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. An actuator with valve position feedback, comprising a cylinder body (100) having an inner cavity (101), a piston (200) being disposed in the inner cavity (101), a piston (200) being disposed on the piston (200), one end of the piston (200) rod passing through the cylinder body (100) and extending parallel to the length direction of the cylinder body (100), characterized in that: The piston (200) rod is provided with a socket (301) extending from an end close to one end of the piston (200) toward an end away from the piston (200), and the socket (301) is provided with a magnetic ring (400); the cylinder body (100) is provided with an induction probe (500) at one end away from the extending direction of the piston (200) rod, and the induction probe (500) extends to the inner cavity (101), passes through the magnetic ring (400), and is inserted into the socket (301).

2. The actuator with valve position feedback according to claim 1, characterized in that: An embedding groove (302) coaxial with the insertion hole (301) is provided at the end of the piston (200) rod close to one end of the piston (200), and the magnetic ring (400) is fixedly embedded in the embedding groove (302), and the center hole of the magnetic ring (400) is coaxial with the insertion hole (301).

3. The actuator with valve position feedback according to claim 1, characterized in that: The inner cavity (101) has a circular cross-section; the piston (200) rod is coaxial with the piston (200); the socket (301) is coaxial with the piston (200) rod; and the sensing probe (500) is coaxial with the socket (301).

4. The actuator with valve position feedback according to claim 1, characterized in that: Detection switches (600) for monitoring the upper and lower limit positions of the piston (200) are respectively provided at both ends of the cylinder body (100) in the length direction.

5. The actuator with valve position feedback according to claim 4, characterized in that: A connecting seat (700) for connecting to a slide valve (800) is provided on the cylinder body (100) at one end of the piston (200) rod extending out of the cylinder body (100).

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