Locking device for preventing control mode of electric actuator from being switched mistakenly

Abstract

The utility model relates to the technical field of motor operation, in particular to a locking device for preventing the control mode of an electric actuator from being switched mistakenly. The locking device comprises a first clamping ring, a second clamping ring and a third clamping ring, wherein the rear end of the first clamping ring is a linear handle, and the front end of the first clamping ring is an arc-shaped elbow; a linear handle is arranged at the rear end of the second clamping ring, and an arc-shaped elbow is arranged at the front end of the second clamping ring; the elbow of the first clamping ring and the elbow of the second clamping ring are in butt joint to form a circular ring shape and are used for being connected to the cam piece in a sleeving mode. The handle of the first clamping ring is connected with the handle of the second clamping ring through a connecting shaft; a torsional spring is arranged at the vertical contact position of the handle of the first clamping ring and the handle of the second clamping ring. The electric valve control mode switching device is used for eliminating the risk of electric valve control mode switching caused by misoperation of the cam piece and is easy and convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor operation technical field especially relates to a kind of locking device for preventing electric actuator control mode mis-switching. BACKGROUND

[0002] Bernard angle stroke electric actuator is widely used in nuclear power plant process system electric valve.Bernard angle stroke electric actuator is locked by a limit cam piece on structure to make Bernard angle stroke electric actuator "remote / local" switch knob action.

[0003] Bernard angle stroke electric actuator "remote / local" switch knob can be rotated by pressing limit cam piece to make cam adjusting screw disengage locking position, to realize Bernard angle stroke electric actuator "remote / local" switching.But in actual operation, it is found that, because cam adjusting screw is only protruding 1mm to lock cam piece.In electric valve action or system medium operation causes valve vibration, and because of the narrow space of on-site equipment, the Bernard angle stroke electric actuator "remote / local" switch knob locking failure is caused by the mistake of personnel walking.Cam adjusting screw disengages locking position.Bernard angle stroke electric actuator "remote / local" switch knob loses locking and can be freely rotated, and the control mode of electric valve is not controlled, which affects system safe operation. SUMMARY

[0004] The utility model provides a kind of locking device for preventing electric actuator control mode mis-switching, eliminate the risk that cam piece misoperation causes electric valve control mode switching, easy to operate, it is convenient.

[0005] The utility model provides a kind of locking device for preventing electric actuator control mode mis-switching, comprising:

[0006] The first snap ring is straight line type handle at rear end, and the front end is arc-shaped elbow;

[0007] The second snap ring is straight line type handle at rear end, and the front end is arc-shaped elbow;

[0008] The elbow of the first snap ring and the elbow of the second snap ring are butted to form a circular ring, for being sleeved on cam piece;

[0009] The handle of the first snap ring and the handle of the second snap ring are connected by connecting shaft;

[0010] Torsional spring is arranged at the vertical contact of the handle of the first snap ring and the handle of the second snap ring.

[0011] In the utility model one specific embodiment, the elbow of the first snap ring and the elbow of the second snap ring contact end design have mutually matched concave-convex interface structure.

[0012] In the embodiment of the utility model, the handle of the second snap ring is provided with a groove, the handle of the first snap ring is clamped in the groove, and the first snap ring is connected through the connecting shaft.

[0013] In the embodiment of the utility model, the thickness of the first snap ring is 5-7mm, and the thickness of the second snap ring is the same as that of the first snap ring.

[0014] In the embodiment of the utility model, the thickness of the first snap ring is 6mm.

[0015] In the embodiment of the utility model, the rear end of the handle of the first snap ring is provided with a snap ring hole.

[0016] In the embodiment of the utility model, the rear end of the handle of the second snap ring is provided with a snap ring hole.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The shape and size are suitable for Bernard electric actuators of nuclear power plants;

[0019] (2) The device prevents the remote / local switching knob action of the electric actuator through the locking and limiting cam piece action, enhances the locking effect of the limiting cam piece on the remote / local switching knob of the electric actuator, and effectively prevents the misoperation of the remote / local switching knob;

[0020] (3) The device is convenient to manufacture, low in cost, and can be widely applied to Bernard electric actuators;

[0021] (4) The device is simple in structure and convenient to use. DRAWINGS

[0022] Figure 1 The utility model discloses a locking device for preventing the misoperation of the Bernard electric actuator,

[0023] In the figure, 1 is a first snap ring, 2 is a second snap ring, 3 is a connecting shaft, 4 is a torsion spring, 5 is a concave-convex structure, and 6 is a snap ring hole. EMBODIMENT

[0024] In order to further understand the utility model, the embodiment of the utility model is described below in combination with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, and are not the limitation of the utility model.

[0025] The embodiment of the utility model discloses a locking device for preventing the misoperation of the Bernard electric actuator, Figure 1As shown, comprising:

[0026] The first clasp 1 has a straight handle at the rear end and an arc-shaped bend at the front end;

[0027] The second clasp 2 has a straight handle at the rear end and an arc-shaped bend at the front end;

[0028] The bend of the first clasp 1 and the bend of the second clasp 2 are connected to form a ring shape for sleeving on the cam piece;

[0029] The contact end of the bend of the first clasp 1 and the bend of the second clasp 2 are designed with a concave-convex interface structure 5 that matches each other, thereby increasing the fastening effect.

[0030] The handle of the first clasp 1 and the handle of the second clasp are connected through a connecting shaft 3;

[0031] Specifically, the handle of the first clasp 1 is provided with a groove, the handle of the second clasp is provided with a groove, the two grooves are clamped, and the connecting shaft 3 is connected;

[0032] Alternatively, only the handle of one clasp is provided with a groove, and the handle of the other clasp is clamped in the groove and connected through the connecting shaft 3;

[0033] A torsion spring 4 is arranged at the vertical contact of the handle of the first clasp 1 and the handle of the second clasp 2 to keep the locking device closed in normal operation.

[0034] The thickness of the first clasp is 5-7mm, preferably 6mm; the thickness of the second clasp is the same as that of the first clasp.

[0035] The rear end of the handle of the first clasp 1 is provided with a clasp hole 6, or the rear end of the handle of the second clasp 2 is provided with a clasp hole 6. The entire locking device can be fixed on the equipment through the clasp hole 6 to prevent accidental falling.

[0036] The materials of the first clasp 1, the second clasp 2, the connecting shaft 3, and the torsion spring 4 are all aluminum alloy.

[0037] The use method of the utility model is as follows:

[0038] 1. The first clasp 1 and the second clasp 2 are clamped by hand to separate them, and the first clasp 1 and the second clasp 2 are inserted into the cam piece together;

[0039] 2. Loosen the first clasp 1 and the second clasp 2, and use the tension of the torsion spring 4 to fix the locking device in the cam piece, so that the cam piece cannot be pressed.

[0040] When the control mode of the electric actuator needs to be adjusted, the locking device is removed. After adjusting to the required control mode, repeat steps 1 and 2 to place the locking device again.

[0041] The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A locking device for preventing an electric actuator from switching its control mode by mistake, characterized in that: include: The first clasp has a straight handle at the rear end and an arc-shaped elbow at the front end; The second clasp has a straight handle at the rear end and an arc-shaped elbow at the front end; The elbow of the first snap ring and the elbow of the second snap ring are connected to form a circular ring for sleeve connection on the cam plate; The handle of the first snap ring is connected to the handle of the second snap ring via a connecting shaft; A torsion spring is provided at a vertical contact point between the handle of the first clamping ring and the handle of the second clamping ring.

2. The locking device for preventing erroneous switching of the control mode of an electric actuator according to claim 1, characterized in that: The contact ends of the elbow of the first clamping ring and the elbow of the second clamping ring are designed with mutually matching concave and convex interface structures.

3. The locking device for preventing erroneous switching of the control mode of an electric actuator according to claim 1, characterized in that: A groove is provided on the handle of the second clamping ring, and the handle of the first clamping ring is clamped in the groove and connected via a connecting shaft.

4. The locking device for preventing erroneous switching of the control mode of an electric actuator according to claim 1, characterized in that: The thickness of the first clamping ring is 5-7 mm, and the thickness of the second clamping ring is the same as that of the first clamping ring.

5. The locking device for preventing erroneous switching of the control mode of an electric actuator according to claim 4, characterized in that: The thickness of the first clamping ring is 6 mm.

6. The locking device for preventing erroneous switching of the control mode of an electric actuator according to claim 1, characterized in that: A snap ring hole is provided at the rear end of the handle of the first snap ring.

7. The locking device for preventing erroneous switching of the control mode of an electric actuator according to claim 1, characterized in that: A snap ring hole is provided at the rear end of the handle of the second snap ring.

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