CN203721534U - Electric knife-switch latch-up protection device - Google Patents

Abstract

The utility model relates to an electric knife gate locking protection device, which comprises a knife gate operating mechanism box, an electric knife gate transmission rod, a locking disc I and a locking disc II are arranged on the top of the knife gate operating mechanism box, and the lower part of the electric knife gate driving rod The locking plate I is set, and the locking plate I is provided with a locking hole; the locking plate II is provided with a locking transmission rod and a limit structure, and the locking transmission rod is movably connected to the locking pin; the locking transmission rod is connected to the travel switch, and the travel switch is connected to the intermediate relay. The intermediate relay is connected to the operating power supply of the electric knife switch. The utility model has reliable action, double locking of mechanical locking and electrical locking. The operation is simple, flexible and convenient, and it is easy to maintain.

Description

Electric knife switch locking protection device

technical field

The utility model relates to a protection device for electric equipment, in particular to a locking protection device for an electric knife switch.

Background technique

When operating electric knife switches such as GW-17, GW-16, GW-20, and GW-6A, the operating personnel must use the palm computer key (misoperation prevention device) to open the anti-mistake lock of the electric knife switch operation terminal box. , Use the green and red buttons to pull and close the electric knife switch in the electric knife switch operation terminal box to operate the knife switch. And during the maintenance work, the maintenance personnel checks and repairs the electric knife switch mechanism box, and sometimes needs to unlock the mechanism box anti-mislocking lock. Although the power supply in the operating mechanism box of the knife switch can be disconnected after the main power supply of the knife switch is disconnected, it is still possible to touch the opening and closing buttons, the electromechanical part and the secondary circuit part during inspection and minor repairs. If there is a power supply connected to the knife switch mechanism, it will cause the knife switch to malfunction and cause major misoperation accidents such as the knife switch to close incorrectly. GW-17, GW-16, GW-20, GW-6A and other electric knife switches operate normally when their mechanism operating power is connected, so as to ensure that the heating, tide driving and lighting functions in the mechanism box are normal. There will be great safety risks if these functions are repaired without power failure, such as misoperation of opening and closing switches that are not locked, misoperation of secondary circuits caused by misoperation, etc.

Utility model content

The utility model aims at the problems existing in the above-mentioned prior art, and provides an electric knife switch locking protection device, which solves the problem that the electric knife switch is prone to misoperation in the prior art.

The technical scheme of the utility model is as follows:

The top of the knife switch operating mechanism box is provided with an electric knife switch transmission rod, a locking plate I and a locking plate II, and the lower part of the electric knife switch transmission rod is set with a locking plate I, and the locking plate I is provided with a locking hole; the locking plate II is provided with a The locking transmission rod and the limit structure, the locking transmission rod is movably connected to the locking pin; the locking transmission rod is connected to the travel switch, the travel switch is connected to the intermediate relay, and the intermediate relay is connected to the operating power supply of the electric knife switch.

The electric knife switch transmission rod adopts gear engagement.

The position-limiting structure on the locking disc II is that the edge of the locking disc II is provided with a convex edge, and a groove is arranged on the convex edge.

Said groove matches the locking pin.

A hanging ring is arranged on the convex edge, and a locking ring is arranged on the locking pin; the hanging ring matches the locking ring.

The travel switch is arranged at the bottom of the electric knife switch mechanism box.

The advantages and effects of the present invention are as follows:

1. Reliability: The device is reliable in action, with double locking of mechanical locking and electrical locking. After mechanical locking, the electrical locking part automatically disconnects the circuit in the knife switch operating mechanism box, so that the power supply in the knife switch operating mechanism box is lost, thereby achieving double locking.

2. Operability: The device has the characteristics of simple, flexible and convenient operation. The operator only needs to open the anti-misoperation lock and adjust the position of the locking pin from the locked position to the unlocked position to achieve the unlocked state. The electrical part will automatically close the power supply in the electric knife switch operating mechanism box. After checking that the power indicator light in the mechanism box is normal, you can operate the electric knife switch through the opening and closing buttons.

3. Ease of maintenance: It is convenient to check the equipment in the operating mechanism box of the electric knife switch and deal with some problems that can be solved without power failure, such as: finding water in the mechanism box, damp, dust removal, etc. It completely solves the problem of being afraid to deal with it due to fear of misoperation and misoperation.

Description of drawings

Figure 1 is a schematic structural view of the utility model.

Figure 2 is a schematic diagram of the circuit structure of the utility model.

In the figure, 1. Electric knife switch transmission rod, 2. Locking disc I, 3. Locking pin, 4. Locking disc II, 5. Locking transmission rod, 6. Locking hole, 7. Anti-mislocking, 8. Hanging ring, 9. Knife switch operating mechanism box; ZJ: Intermediate relay, CJ1\CJ2: AC contactor, K1: Travel switch, K2\K3: AC contactor start button, KK: Power switch.

Detailed ways

The specific structure of the utility model will be described in detail below in conjunction with specific embodiments with reference to the accompanying drawings.

Example

As shown in Figure 1-2, the top of the knife switch operating mechanism box 9 is provided with an electric knife switch transmission rod 1, a locking disc I 2 and a locking disc II 4, the electric knife switch transmission rod adopts gear engagement, and the electric knife switch transmission rod rotates With three-phase knife switch movement separation and closing; the lower part of the electric knife switch transmission rod 1 is equipped with a locking plate I 2, and the locking plate I is provided with a locking hole 6; the locking plate II is provided with a locking transmission rod 5, which is movably connected The locking pin 3 is provided with a locking ring 7; the edge of the locking disc II is provided with a convex edge, and a groove and a hanging ring 8 are arranged on the convex edge. The groove matches the locking pin, and the hanging ring matches the locking ring. The hanging ring and the locking ring are used to hang anti-mislocking; the locking transmission rod is connected to the travel switch K1 set at the bottom of the electric knife switch mechanism box, and the travel switch K1 is connected to the intermediate relay ZJ, and the intermediate relay ZJ is connected to the operating power supply of the electric knife switch, and the travel switch K1 drives the intermediate relay ZJ to open and close the electric knife switch to operate the power supply.

The locking pin is fixed under the groove of the locking disc II, and has a locking effect on the transmission rod of the electric knife switch. The locking pin is a movable pin, and when the locking pin was in the locking hole position in the locking disc 1, the locking disc 1 was locked; when the locking pin rotated and staggered the locking hole position, the locking disc 1 was unlocked.

Claims (6)

1. The electric knife lock protection device, including the knife gate operating mechanism box, is characterized in that the top of the knife gate operating mechanism box is equipped with an electric knife gate transmission rod, a locking disc I and a locking disc II, and the lower part of the electric knife gate transmission rod is set Locking disc I is provided with a locking hole; locking disc II is provided with a locking transmission rod and a limit structure, and the locking transmission rod is movably connected to the locking pin; the locking transmission rod is connected to the travel switch, and the travel switch is connected to the intermediate relay. The relay is connected to the operating power of the electric knife switch. 2. The locking protection device for an electric knife switch according to claim 1, characterized in that the transmission rod of the electric knife switch adopts gear engagement. 3. The electric knife switch locking protection device according to claim 1, characterized in that the limit structure on the locking plate II is that the edge of the locking plate II is provided with a convex edge, and a groove is provided on the convex edge. 4. The locking protection device for electric knife switch according to claim 3, characterized in that the groove matches the locking pin. 5. The locking protection device for an electric knife switch according to claim 3, wherein a hanging ring is provided on the convex edge, and a locking ring is provided on the locking pin; the hanging ring matches the locking ring. 6. The electric knife switch locking protection device according to claim 1, characterized in that the travel switch is arranged at the bottom of the electric knife switch mechanism box.