CN216925421U

CN216925421U - Limit switch

Info

Publication number: CN216925421U
Application number: CN202122926936.5U
Authority: CN
Inventors: 庞守军; 王力; 林谦
Original assignee: China Nuclear Industry Maintenance Co Ltd
Current assignee: China Nuclear Industry Maintenance Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-07-08
Anticipated expiration: 2031-11-25

Abstract

The utility model relates to the technical field of equipment maintenance and debugging, and provides a limit switch, which comprises: the device comprises a main body, a control circuit and a rotating shaft are arranged in the main body, a rocker arm is arranged on the main body, one end of the rocker arm is connected with the rotating shaft, and the rocker arm can drive the rotating shaft to rotate so as to enable the control circuit to be switched off or switched on; the scale mark is arranged on the main body and extends along a first path, the first path is in a circular arc shape, and the circle center of the first path is overlapped with the rotation center of the rocker arm; and the pointer is provided with a first end and a second end which are opposite, the first end is connected with the rocker arm, and the pointer can rotate along with the rocker arm so that the second end points on different scales of the scale marks. The limit switch can accurately mark the rotation angle of the rocker arm on the limit switch, and is very convenient to reset the rocker arm.

Description

Limit switch

Technical Field

The utility model relates to the technical field of equipment maintenance and debugging, in particular to a limit switch.

Background

In the daily work of maintenance and debugging of nuclear power equipment, limit switches of various valves need to be debugged, the limit switches are also called travel switches, and the change state of the switches in the limit travel switches can be tested by rotating rocker arms of the limit switches.

The current position of the rocker arm on the limit switch can only be used as a reference for the existing various limit switches before debugging, then the debugging is triggered, after the debugging is completed, because no reference object which can be referred to exists, the degree of co-rotation of the rocker arm from the original reference point to the current position can not be accurately judged, and when the rocker arm on the limit switch needs to be reset to the original reference point, the operation is also very inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a limit switch, which can accurately mark the rotation angle of a rocker arm on the limit switch and is very convenient to reset the rocker arm.

The embodiment of the application provides a limit switch, include:

the device comprises a main body, a control circuit and a rotating shaft are arranged in the main body, a rocker arm is arranged on the main body, one end of the rocker arm is connected with the rotating shaft, and the rocker arm can drive the rotating shaft to rotate so as to enable the control circuit to be switched off or switched on;

the scale mark is arranged on the main body and extends along a first path, the first path is in a circular arc shape, and the circle center of the first path is superposed with the rotation center of the rocker arm; and

the pointer is provided with a first end and a second end which are opposite, the first end is connected with the rocker arm, and the pointer can rotate along with the rocker arm, so that the second end points on different scales of the scale marks.

According to the limit switch provided by the embodiment of the utility model, the scale mark and the pointer are arranged on the main body, the scale mark extends along the arc-shaped first path with the center of circle coinciding with the rotation center of the rocker arm, and the first end of the pointer is connected with the rocker arm, so that the pointer can judge the rotation angle of the rocker arm by pointing the second end of the pointer on different scales of the scale mark in the process of rotating along with the rocker arm, and the limit switch is simple, clear and clear, can accurately mark the rotation angle of the rocker arm on the limit switch in the debugging process, and is very convenient to reset the rocker arm.

In some of these embodiments, the rocker arm extends in a direction opposite to the direction of extension of the pointer.

Through adopting above-mentioned scheme, conveniently observe the position change of the second end of pointer on the scale mark more, conveniently take notes the scale change.

In some of these embodiments, the rocker arm is removably coupled to the pivot shaft.

By adopting the scheme, when the rocker arm rotates to the limit position and cannot drive the rotating shaft to rotate, the rocker arm can be detached from the rotating shaft, the angle of the rocker arm can be adjusted according to the requirement of the rotating shaft, and then the rocker arm is assembled back and drives the rotating shaft to rotate continuously until the requirement is met, so that the debugging task can be completed.

In some embodiments, a first through hole is formed in the rocker arm, a first threaded hole is formed in the rotating shaft, and the rocker arm and the rotating shaft are connected together through a first screw penetrating through the first through hole and the first threaded hole.

By adopting the scheme, the rocker arm and the rotating shaft can be conveniently assembled and disassembled, and the rocker arm is simple in structure and convenient to process.

In some of these embodiments, the limit switch further comprises a scale plate on which the scale lines are disposed, the scale plate being disposed on the body.

Through adopting above-mentioned scheme, can process out the scale mark on the scale plate now, adorn the scale plate in the main part, and need not directly to process out the scale mark in the main part to make the better processing of scale mark.

In some of these embodiments, the body is removably attached to the dial plate.

Through adopting above-mentioned scheme, make things convenient for being connected of main part and scale plate to can be more convenient reform transform current limit switch.

In some embodiments, two opposite sides of the scale plate are provided with two clamping blocks, and the two clamping blocks are respectively clamped on two opposite side surfaces of the main body.

By adopting the scheme, the main body is more convenient to be connected with the scale plate, and the scale plate is simple in structure and convenient to process.

In some embodiments, the scale plate is provided with a second through hole, the main body is provided with a second threaded hole, and the main body and the scale plate are connected together through a second screw passing through the second through hole and the second threaded hole.

By adopting the scheme, the connection between the main body and the scale plate can be more convenient and tight.

In some embodiments, a roller is disposed at an end of the rocker arm away from the main body, the roller is rotatably connected with the rocker arm, and the roller is parallel to the rotation axis of the rocker arm relative to the main body relative to the rotation axis of the rocker arm.

Through adopting above-mentioned scheme, the one end that the main part was kept away from through promoting the rocking arm conveniently drives the axis of rotation and rotates.

The limit switch provided by the embodiment of the utility model has the beneficial effects that: through set up scale mark and pointer in the main part, the scale mark extends along the first route of the coincidence of the centre of a circle and the center of rotation of rocking arm, and the first end and the rocking arm of pointer are connected, can make the pointer judge the turned angle of rocking arm on the different scales of scale mark through its second end finger along with rocking arm pivoted in-process, and is simple, clear, can carry out accurate sign to the turned angle of rocking arm on the limit switch in the debugging process, and it is also very convenient when the rocking arm resets.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic diagram of a limit switch according to one embodiment of the present invention;

FIG. 2 is an exploded view of the limit switch of FIG. 1;

fig. 3 is a schematic structural view of a dial plate in the limit switch shown in fig. 1.

The designations in the figures mean:

100. a limit switch; 10. a main body; 11. a rotating shaft; 111. a first threaded hole; 12. a rocker arm; 121. a first through hole; 13. a roller; 20. a scale plate; 21. scale lines; 22. a first path; 23. a clamping block; 30. a pointer; 31. a first end; 32. a second end; 33. a connecting through hole; 40. a first screw; 50. an elastic pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, which are examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In order to explain the technical solution of the present invention, the following description is made with reference to the specific drawings and examples.

Referring to fig. 1 and 2, an embodiment of the present application provides a limit switch 100, which includes a main body 10, scale marks 21, and a pointer 30.

The main body 10 is provided therein with a control circuit (not shown) and a rotating shaft 11, the main body 10 is provided with a rocker arm 12, one end of the rocker arm 12 is connected to the rotating shaft 11, and the rocker arm 12 can drive the rotating shaft 11 to rotate, so that the control circuit is turned off or on.

The structures of the control circuit and the rotating shaft 11 inside the main body 10 and the principle that the rotating shaft 11 can be driven to rotate by rotating the rocker arm 12 on the main body 10 to turn off or on the control circuit are mature prior art, and therefore, the detailed description thereof is omitted.

The scale marks 21 are provided on the main body 10, the scale marks 21 extend along a first path 22, and the first path 22 is provided in the shape of a circular arc with the center coinciding with the center of rotation of the rocker arm 12. It will be appreciated that the graduation marks 21 comprise a plurality of marking lines representing different graduations, the plurality of marking lines being arranged along the first path 22.

It will be appreciated that since the center of rotation of the rocker arm 12 is an axis, the center of the first path 22 coinciding with the center of rotation of the rocker arm 12 will be understood to be the center of the first path 22 being on the center axis of rotation of the rocker arm 12.

The pointer 30 has opposite first and second ends 31 and 32, the first end 31 being connected to the swing arm 12, the pointer 30 being rotatable with the swing arm 12 such that the second end 32 points on a different scale of the scale markings 21 to identify the angle of rotation of the swing arm 12.

It will be appreciated that the graduation marks 21 may include positive and negative graduations, or only positive graduations, or only negative graduations, such as when the graduation marks 21 may include positive and negative graduations, and when the limit switch 100 is not being commissioned, the second end 32 points on the 0 graduation of the graduation marks 21.

According to the limit switch 100 provided by the embodiment of the utility model, the scale mark 21 and the pointer 30 are arranged on the main body 10, the scale mark 21 extends along the arc-shaped first path 22 with the center coinciding with the rotation center of the rocker arm 12, and the first end 31 of the pointer 30 is connected with the rocker arm 12, so that the pointer 30 can judge the rotation angle of the rocker arm 12 by pointing the second end 32 of the pointer on different scales of the scale mark 21 in the process of rotating along with the rocker arm 12, and the limit switch 100 is simple, clear and clear, can accurately mark the rotation angle of the rocker arm 12 on the limit switch 100 in the debugging process, and is very convenient to reset the rocker arm 12.

The limit switch 100 provided by the embodiment of the utility model can compare the pre-adjustment position and the post-adjustment position of the limit switch 100, and the number of the adjustment positions is counted in the rear center of the trigger state, so that the problem of the same type of limit switch 100 is encountered next time, the debugging key is already mastered, and the limit switch 100 has referential property. Workers have scales for comparison before and after debugging, more debugging and less debugging are performed, and experience can be summarized or the original position can be restored conveniently. For a novice who first contacts the limit switch 100 for debugging, the method has a very intuitive effect, and is easy to get off, a master can point out the debugging technology at a glance, and the master can easily master the debugging skill of the limit switch 100 in the learning process.

Referring to FIG. 1, in some embodiments, the rocker arm 12 extends in a direction opposite to that of the pointer 30.

By adopting the scheme, the position change of the second end 32 of the pointer 30 on the scale mark 21 can be observed more conveniently, and the scale change can be recorded conveniently.

Referring to fig. 1 and 2, in some embodiments, the swing arm 12 is detachably connected to the rotating shaft 11.

By adopting the scheme, when the rocker arm 12 rotates to the limit position and cannot drive the rotating shaft 11 to rotate, the rocker arm 12 can be detached from the rotating shaft, the angle required to be adjusted according to the rotating shaft is determined, and then the rocker arm 12 is installed back and drives the rotating shaft 11 to rotate continuously until the requirement is met, so that the debugging task can be completed.

Referring to fig. 2, in some embodiments, the rocker arm 12 is provided with a first through hole 121, the rotating shaft 11 is provided with a first threaded hole 111, and the rocker arm 12 and the rotating shaft 11 are connected together by a first screw 40 penetrating through the first through hole 121 and the first threaded hole 111.

By adopting the scheme, the rocker arm 12 and the rotating shaft 11 are convenient to assemble and disassemble, and the rocker arm is simple in structure and convenient to process.

Further, the pointer 30 is detachably connected to the swing arm 12. For example, the pointer 30 is provided with a connection through hole 33, and the first screw 40 is inserted into the connection through hole 33, the first through hole 121, and the first screw hole 111. It is convenient to adjust the position of the second end 32 of the pointer 30 on the scale mark 21 when the swing arm 12 is mounted back on the rotating shaft 11 and the rotating shaft 11 is driven to rotate continuously.

Optionally, an elastic pad 50 is further sleeved on the first screw 40, and the elastic pad 50 is located between the swing arm 12 and the pointer 30. Thereby preventing the first screw 40 from loosening.

Referring to fig. 1 and 3, in some embodiments, the limit switch 100 further includes a scale plate 20, the scale lines 21 are disposed on the scale plate 20, and the scale plate 20 is disposed on the main body 10.

By adopting the scheme, the scale marks 21 can be processed on the scale plate 20, and the scale plate 20 is arranged on the main body 10 without directly processing the scale marks 21 on the main body 10, so that the scale marks 21 can be better processed.

In some of these embodiments, the body 10 is removably attached to the dial plate 20.

By adopting the scheme, the connection between the main body 10 and the scale plate 20 is facilitated, so that the existing limit switch 100 can be more conveniently transformed.

Referring to fig. 3, in some embodiments, two opposite sides of the scale plate 20 are provided with two locking blocks 23, and the two locking blocks 23 are respectively locked on two opposite sides of the main body 10.

By adopting the scheme, the main body 10 and the scale plate 20 are more convenient to connect and convenient to process.

In some embodiments, the scale plate 20 is provided with a second through hole, the main body 10 is provided with a second threaded hole, and the main body 10 and the scale plate 20 are connected together by a second screw passing through the second through hole and the second threaded hole.

By adopting the above scheme, the connection between the main body 10 and the scale plate 20 can be more convenient and tight.

Referring to fig. 1 and 2, in some embodiments, a roller 13 is disposed at an end of the rocker arm 12 away from the main body 10, the roller 13 is rotatably connected to the rocker arm 12, and a rotation axis 11 of the roller 13 relative to the rocker arm 12 is parallel to a rotation axis 11 of the rocker arm 12 relative to the main body 10.

By adopting the scheme, the rotating shaft 11 is conveniently driven to rotate by pushing one end of the rocker arm 12 far away from the main body 10.

Referring to fig. 1, 2 and 3, an embodiment of the present application provides a limit switch 100, which includes a main body 10, a scale plate 20 and a pointer 30.

The inside of main part 10 is provided with control circuit and axis of rotation 11, is provided with rocking arm 12 on the main part 10, and the one end of rocking arm 12 is connected with axis of rotation 11, and rocking arm 12 can drive axis of rotation 11 and rotate to make control circuit disconnection or switch-on.

The scale marks 21 are arranged on the scale plate 20, two opposite sides of the scale plate 20 are respectively provided with a fixture block 23, and the two fixture blocks 23 are respectively clamped on two opposite side surfaces of the main body 10.

The pointer 30 has a first end 31 and a second end 32 which are opposite to each other, the rocker arm 12 is opposite to the extending direction of the pointer 30, a first through hole 121 is formed in the rocker arm 12, a first threaded hole 111 is formed in the rotating shaft 11, and the rocker arm 12 and the rotating shaft 11 are connected together through a first screw 40 which is arranged in the first through hole 121 and the first threaded hole 111 in a penetrating manner. The pointer 30 is rotatable with the rocker arm 12 such that the second end 32 points on a different scale from the scale markings 21 to identify the angle of rotation of the rocker arm 12.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A limit switch, comprising:

the scale mark is arranged on the main body and extends along a first path, the first path is in a circular arc shape, and the circle center of the first path is overlapped with the rotation center of the rocker arm; and

2. The limit switch of claim 1, wherein the rocker arm extends in a direction opposite to the direction of extension of the pointer.

3. The limit switch of claim 1, wherein the rocker arm is removably connected to the pivot shaft.

4. The limit switch according to claim 3, wherein the rocker arm is provided with a first through hole, the rotating shaft is provided with a first threaded hole, and the rocker arm and the rotating shaft are connected together through a first screw passing through the first through hole and the first threaded hole.

5. The limit switch of claim 4, wherein the first end is removably connected to the rocker arm.

6. The limit switch according to any one of claims 1 to 5, further comprising a dial plate, wherein the graduation marks are provided on the dial plate, and the dial plate is provided on the main body.

7. The limit switch of claim 6, wherein the body is removably connected to the dial plate.

8. The limit switch according to claim 7, wherein two opposite sides of the scale plate are provided with two clamping blocks, and the two clamping blocks are respectively clamped on two opposite side surfaces of the main body.

9. The limit switch according to claim 7, wherein the scale plate is provided with a second through hole, the main body is provided with a second threaded hole, and the main body and the scale plate are connected together through a second screw passing through the second through hole and the second threaded hole.

10. The limit switch of any one of claims 1 to 5, wherein a roller is provided at an end of the rocker arm remote from the main body, the roller being rotatably connected to the rocker arm, the roller being parallel to the axis of rotation of the rocker arm relative to the main body relative to the axis of rotation of the rocker arm.