CN210118513U - Valve feedback device for angular travel pneumatic actuator - Google Patents
Valve feedback device for angular travel pneumatic actuator Download PDFInfo
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- CN210118513U CN210118513U CN201920408620.7U CN201920408620U CN210118513U CN 210118513 U CN210118513 U CN 210118513U CN 201920408620 U CN201920408620 U CN 201920408620U CN 210118513 U CN210118513 U CN 210118513U
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- proximity switch
- valve
- feedback
- angular travel
- junction box
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Abstract
The utility model discloses a valve feedback device for an angular travel pneumatic actuator, which comprises a proximity switch, a device junction box, a feedback indicating component and a proximity switch bracket; the feedback indicating assembly is arranged at the top end of the angular travel pneumatic actuating mechanism and is connected with a cylinder rotating shaft of the angular travel pneumatic actuating mechanism; the proximity switch bracket is arranged on one side of the feedback indicating assembly, the proximity switch is arranged on the proximity switch bracket, and the device junction box is separated from the angular travel pneumatic actuating mechanism; and a communication interface is arranged in the device junction box and is in communication connection with the proximity switch. The utility model discloses because the device terminal box sets up with feedback device body separation, can effectively avoid the feedback signal trouble that the feedback device body arouses because of reasons such as the vibrations of installation environment are big, dusty diuresis, have beneficial effect such as antidetonation, waterproof, dustproof.
Description
Technical Field
The utility model particularly relates to a valve feedback device for pneumatic actuating mechanism of angle stroke.
Background
In peripheral auxiliary systems such as a chemical water treatment and dry ash system and the like of a thermal power plant, a bidirectional air inlet lock type angular travel pneumatic actuating mechanism mostly adopts a mechanical contact type switching valve feedback device. Although the valve position feedback device has a simple structure, the environment of the angular travel pneumatic actuator is severe: the feedback fault problem of the angular travel pneumatic actuator is caused by the fact that the conventional mechanical contact type switching value valve feedback device is frequently loosened and damaged by connecting terminals for feedback or the whole feedback device due to large vibration, moisture, strong dust and the like, namely the existing feedback device applied to the angular travel pneumatic actuator is poor in reliability and obvious in equipment degradation. Therefore, a reliable valve feedback device is lacked for the angular travel pneumatic actuator under the installation environment.
SUMMERY OF THE UTILITY MODEL
The drawback to current contact feedback device, the utility model provides a valve feedback device for pneumatic actuating mechanism of angle stroke, can be antidetonation, waterproof, dustproof, the reliability is high, is applicable to the abominable condition such as vibrations are big, dusty, moist.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
a valve feedback device for an angular travel pneumatic actuator comprises a proximity switch, a device junction box, a feedback indicating assembly and a proximity switch bracket;
the feedback indicating assembly is arranged at the top end of the angular travel pneumatic actuating mechanism and is connected with a cylinder rotating shaft of the angular travel pneumatic actuating mechanism; the proximity switch bracket is arranged on one side of the feedback indicating assembly, the proximity switch is arranged on the proximity switch bracket, the feedback indicating assembly is arranged in the sensing range of the proximity switch, and the device junction box is separated from the angular travel pneumatic actuating mechanism; and a communication interface is arranged in the device junction box and is in communication connection with the proximity switch.
Because the device terminal box sets up with feedback device body (proximity switch, proximity switch support, feedback indicating subassembly etc.) separation promptly, can effectively avoid feedback device body because of reasons such as the vibrations of installation environment are big, dustiness diuresis and feedback signal trouble that arouse, have beneficial effects such as antidetonation, waterproof, dustproof.
Furthermore, the number of the proximity switches and the number of the proximity switch supports are 2, the 2 proximity switch supports are respectively positioned on two sides of the feedback indicating assembly, and each proximity switch support is provided with 1 proximity switch;
the feedback indicating assembly comprises a chassis and 2 indicating rods; the 2 indicating rods are arranged on the chassis and rotate between the 2 proximity switches along with the chassis.
The 2 proximity switches can respectively generate different signals, and the valve switch feedback signals are more accurate.
Furthermore, the indication rod comprises a cross arm end and a vertical rod end which are L-shaped, the cross arm ends of the 2 indication rods are perpendicularly intersected and fixed at the rotation central point of the chassis, and the vertical rod ends of the 2 indication rods are distributed on the circumference of the chassis.
Further, the angular travel of the 2 indicating rods is 90 degrees, and the starting point of the angular travel is 1 arbitrary of the 2 proximity switch supports.
Further, the 2 proximity switches are respectively an open valve side proximity switch and a close valve side proximity switch;
the valve-opening side proximity switch sends a valve full-opening signal to the communication interface of the device junction box, and the valve-closing side proximity switch sends a valve full-closing signal to the communication interface of the device junction box.
Further, the communication interface is connected with a PLC control system or a DCS control system.
Advantageous effects
The utility model discloses a with device terminal box and the separation setting of feedback device body (proximity switch, proximity switch support, feedback indicating assembly etc. promptly), can effectively avoid the feedback signal trouble that the feedback device body arouses because of reasons such as the vibrations of installation environment are big, dusty diuresis, can be combatted earthquake, waterproof, dustproof, the reliability is high.
Drawings
Fig. 1 is a schematic front view of the feedback device of the present invention in an open state;
fig. 2 is a front view of the valve opening indicating rod and the valve closing indicating rod of the feedback device of the present invention in the valve opening state;
fig. 3 is a top view of the valve opening indicating rod, the valve closing indicating rod and the proximity switch of the feedback device of the present invention in the valve opening state;
fig. 4 is a plan view of the valve opening indicating rod, the valve closing indicating rod and the proximity switch of the feedback device of the present invention in the valve closing state.
Detailed Description
The following is a detailed description of the embodiments of the present invention, and the present embodiment uses the technical solution of the present invention as a basis for developing, and gives detailed implementation and specific operation process, and it is right to further explain the technical solution of the present invention.
The valve feedback device shown in fig. 1, which is a preferred embodiment of the present invention, includes an open-valve-side proximity switch 11, a close-valve-side proximity switch 12, a device junction box 20, a feedback indicating assembly 30, an open-valve-side proximity switch bracket 51, and a close-valve-side proximity switch bracket 52. The feedback indicating assembly comprises a chassis 31 driven to rotate by a cylinder rotating shaft 41 of the angular stroke pneumatic actuating mechanism 40, and a valve opening indicating rod 32 and a valve closing indicating rod 33 arranged on the chassis.
As shown in fig. 1 to 4, the valve-opening indicating rod 32 includes a horizontal arm end 321 and a vertical rod end 322, which are L-shaped, the valve-closing indicating rod 33 includes a horizontal arm end 331 and a vertical rod end 332, which are L-shaped, the horizontal arm end 321 of the valve-opening indicating rod 32 and the horizontal arm end 331 of the valve-closing indicating rod 33 are perpendicularly intersected and fixed at a rotation center point of the chassis, and the vertical rod end 322 of the valve-opening indicating rod 32 and the vertical rod end 332 of the valve-closing indicating rod 33 are vertically distributed on the circumference of the chassis.
As shown in fig. 1, the valve-opening-side proximity switch holder 51 and the valve-closing-side proximity switch holder 52 are respectively provided on both sides of the feedback indication assembly 30, the valve-opening-side proximity switch 11 is provided on the valve-opening-side proximity switch holder 51 and detects the approach and the separation of the valve-opening indication lever 32, and the valve-closing-side proximity switch 12 is provided on the valve-closing-side proximity switch holder 52 and detects the approach and the separation of the valve-closing indication lever 33; the device junction box 20 is provided separately from the angular stroke pneumatic actuator 40, and is provided with communication interfaces for communication with the valve-opening-side proximity switch 11 and the valve-closing-side proximity switch 12. In addition, a communication interface of the device junction box is connected with a PLC control system or a DCS control system.
In the valve fully closed state, as shown in fig. 4, the valve-closing indication lever 33 is directed to the valve-closing side proximity switch 12. When the angular travel pneumatic actuator 4 performs a valve opening operation, the cylinder rotating shaft 41 rotates, the chassis 31 rotates counterclockwise, the valve closing indicating rod 33 rotates counterclockwise along with the chassis 31 to gradually get away from the valve closing side proximity switch 12, the normally open contact of the valve closing side proximity switch 12 is opened, and the sending of a valve full-close signal is terminated; meanwhile, the valve opening indicating rod 32 rotates counterclockwise along with the chassis 31 to gradually approach the valve opening side proximity switch 11, when the counterclockwise rotation stroke reaches 90 °, as shown in fig. 3, the valve opening indicating rod 32 points to the valve opening side proximity switch 11, the valve opening side proximity switch 11 detects the valve opening indicating rod 32, the normally open contact in the valve opening side proximity switch 11 is closed, a valve full opening signal is sent to the device junction box, the signal is sent to the PLC control system or the DCS control system through the communication interface in the device junction box, and the valve enters a full opening state.
In the fully open state of the valve, as shown in fig. 3, the valve-opening indication lever 32 is directed to the valve-opening side proximity switch 11. When the angular travel pneumatic actuator 4 performs a valve closing operation, the cylinder rotating shaft 41 rotates, the chassis 31 rotates clockwise, the valve opening indicating rod 32 gradually moves away from the valve opening side approach switch 11 along with the clockwise rotation of the chassis 31, the normally open contact of the valve opening side approach switch 11 acts off, the normally open contact of the valve opening side approach switch 12 acts off, and the sending of a valve full-opening signal is terminated; meanwhile, the valve closing indicating rod 32 rotates clockwise along with the chassis 31 to gradually approach the valve closing side proximity switch 12, when the clockwise rotation stroke reaches 90 °, as shown in fig. 4, the valve closing indicating rod 33 points to the valve closing side proximity switch 12, the valve closing side proximity switch 12 detects the valve closing indicating rod 33, a normally open contact in the valve closing side proximity switch 12 acts to be closed, a valve full-closing signal is sent to the device junction box, the valve full-closing signal is sent to a PLC control system or a DCS control system through a communication interface in the device junction box, and the valve enters a full-closing state.
In the embodiment, the cylinder of the angular travel actuator is a bidirectional air inlet air lock type, and is used for installing the open valve side proximity switch bracket 51 and the close valve side proximity switch bracket 52 on the screw hole of the angular travel actuator 40, and the screw hole of the existing mechanical contact type switching value valve feedback device bracket can be adopted on site; the threaded hole for mounting the chassis 31 to the angular stroke actuator 40 may be a central threaded hole of an existing cylinder rotating shaft. Therefore, when equipment is transformed on the basis that the existing angular travel pneumatic actuating mechanism adopts a mechanical contact type switching value valve feedback device, the cylinder body part of the angular travel pneumatic actuating mechanism does not need to be changed, and an accurate full-on and full-off signal of the valve can be obtained by installing the device.
And the feedback device of this scheme sets up through device terminal box and feedback device body (promptly valve opening side proximity switch, close valve side proximity switch, valve opening side proximity switch support, close valve side proximity switch support, feedback indicating subassembly etc.) separation, can effectively avoid the feedback signal trouble that the feedback device body arouses because of reasons such as the vibrations of installation environment are big, dustiness and wateriness, has beneficial effects such as antidetonation, waterproof, dustproof.
The above embodiments are preferred embodiments of the present application, and those skilled in the art can make various changes or modifications without departing from the general concept of the present application, and such changes or modifications should fall within the scope of the claims of the present application.
Claims (6)
1. A valve feedback device for an angular travel pneumatic actuator is characterized by comprising a proximity switch, a device junction box, a feedback indicating assembly and a proximity switch bracket;
the feedback indicating assembly is arranged at the top end of the angular travel pneumatic actuating mechanism and is connected with a cylinder rotating shaft of the angular travel pneumatic actuating mechanism; the proximity switch bracket is arranged on one side of the feedback indicating assembly, the proximity switch is arranged on the proximity switch bracket, the feedback indicating assembly is arranged in the sensing range of the proximity switch, and the device junction box is separated from the angular travel pneumatic actuating mechanism; and a communication interface is arranged in the device junction box and is in communication connection with the proximity switch.
2. The valve feedback device for the angular travel pneumatic actuator according to claim 1, wherein 2 proximity switches and proximity switch brackets are provided, 2 proximity switch brackets are respectively provided at both sides of the feedback indicating assembly, and 1 proximity switch is provided on each proximity switch bracket;
the feedback indicating assembly comprises a chassis and 2 indicating rods; the 2 indicating rods are arranged on the chassis and rotate between the 2 proximity switches along with the chassis.
3. The valve feedback device for the angular pneumatic actuator according to claim 2, wherein the indicating rod comprises a cross arm end and a vertical rod end which are L-shaped, the cross arm ends of the 2 indicating rods are perpendicularly intersected and fixed at the rotation center point of the chassis, and the vertical rod ends of the 2 indicating rods are distributed on the circumference of the chassis.
4. The valve feedback device for an angular travel pneumatic actuator of claim 3, wherein the angular travel of the 2 indicator levers is 90 ° and the starting point of the angular travel is any 1 of the 2 proximity switch supports.
5. The valve feedback device for an angular stroke pneumatic actuator as claimed in claim 4, wherein the 2 proximity switches are an open-side proximity switch and a closed-side proximity switch, respectively;
the valve-opening side proximity switch sends a valve full-opening signal to the communication interface of the device junction box, and the valve-closing side proximity switch sends a valve full-closing signal to the communication interface of the device junction box.
6. The valve feedback device for an angular travel pneumatic actuator of claim 1, wherein the communication interface is connected to a PLC control system or a DCS control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920408620.7U CN210118513U (en) | 2019-03-28 | 2019-03-28 | Valve feedback device for angular travel pneumatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920408620.7U CN210118513U (en) | 2019-03-28 | 2019-03-28 | Valve feedback device for angular travel pneumatic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210118513U true CN210118513U (en) | 2020-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920408620.7U Active CN210118513U (en) | 2019-03-28 | 2019-03-28 | Valve feedback device for angular travel pneumatic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210118513U (en) |
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2019
- 2019-03-28 CN CN201920408620.7U patent/CN210118513U/en active Active
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