CN201332076Y - Lockset assembly capable of being applied to protection misoperation of motor switch - Google Patents

Abstract

A lock assembly for protecting the misoperation of motor switch features that its main body is fixed adjacent to the motor switch, and its control rod is linked with the locking part of lock to lock the trip mechanism in the motor switch for controlling the main power supply circuit to cut off power.

Description

Lock assembly that can be applied to motor switch protection against misoperation

technical field

The utility model relates to a lock device, in particular to a lock assembly capable of protecting a motor switch tripping mechanism to ensure maintenance safety.

Background technique

Motor switches are the main devices that supply power to machinery or appliances. The most commonly used motor switch is a no-fuse switch (No-Fuse Breaker, NFB for short; or Molded Case Circuit Breaker, MCCB for short, etc.). Based on the fact that the non-fuse switch is an overcurrent (OVERCURRENT) protection device, when it is in the abnormal position of tripping (Trip) and the machine stops running, there are many chances that it is caused by lightning or abnormal current. Excessive pulses are generated and tripped. Usually in this case, as long as the operator presses the test and reset button of the switch, the non-fuse switch can continue to supply current to keep the machine running.

Many electrical accidents in the past have occurred in the maintenance or mismanagement of motor switches. Because in the maintenance of equipment using power supply, a knowledge that is often misunderstood by on-site workers is that they mistakenly think that the electrical safety emergency cut-off power button in the machine can completely cut off all power supplies! But in fact, the electrical safety emergency cut-off power button in the machine is just to cut off the power supply of the electromagnetic coil circuit and cause a trip. The emergency button does not really cut off the main power supply, but almost most people think it is The main power supply has been cut off.

The crisis caused by this misunderstanding, so that when the operator repairs the power machinery during maintenance, or enters the interior of the machinery, if there is another third party who does not know it, they will see that the non-fuse switch is tripping (Trip) In the abnormal position, but the machine stopped running, it was mistakenly thought that the trip was caused by lightning or over-current, so I kindly pressed the test and reset button, started the trip mechanism and pulled the handle of the no-fuse switch to re-insert , The dangerous machinery will start immediately and cause danger. Many motors are used as the power source in the maintenance of equipment, and the harm caused to the maintenance personnel is caused by this.

The above problems have existed for a long time, but have not been properly resolved.

Therefore the inventor once created a kind of no-fuse switch locking device for this problem, mainly through an additional locking device fixed on the no-fuse switch to limit the handle of the no-fuse switch to the position of tripping , the handle cannot be moved unless the handle is unlocked. And according to the above-mentioned technical means, various preferred embodiments of the locking device are provided.

In order to create a more perfect creation, the inventor has made persistent efforts to design a motor switch with a locking trip mechanism. The motor switch is provided with a safety lock, which can lock the trip mechanism inside the motor switch to control the main switch. The power circuit is forcibly cut off to ensure that the main power supply is truly disconnected during maintenance.

The above two designs are related to the improvement of the motor switch structure, and have applied for patents respectively. However, because the motor switch has different shapes and sizes according to the design concept of each manufacturer, and changing the structure of the motor switch requires re-changing the mold, which is a huge project, so the utility model will simplify and simply design a motor switch that can be applied to prevent misoperation The lock assembly makes the lock match the motor switches of various manufacturers, and is more convenient for manufacturing and construction. It can also lock the tripping mechanism inside the motor switch to control the main power supply circuit. There will be a safety purpose of mis-powering.

Contents of the invention

The main purpose of this utility model is to provide a lock assembly that can be applied to the motor switch to protect it from misoperation during maintenance, and can forcibly lock the tripping mechanism of the power switch (CB) so that it does not operate. During maintenance, other personnel can be prevented from starting the motor switch by mistake.

In order to achieve the above purpose, the utility model designs a lock assembly that can be applied to the motor switch to protect against misoperation. So far, it is most suitable for the no-fuse switch that controls the main power supply circuit.

A lock assembly applicable to motor switch protection against misoperation, which includes a body; a bracket fixing the body; a lock installed in the body, which has a key unit and a key unit linked by the key unit lock; and a control rod exposed outside the body, which can be linked with the lock; the control rod has an action end which is smaller than the test hole of the motor switch tripping mechanism, so that the action end is locked when it is locked. The tripping mechanism inside the motor switch can be pressed into the test hole to prevent the tripping mechanism from operating, so as to control the forced power-off of the main power circuit via the motor switch.

Preferably, there is a bracket to fix the body, or the body and the bracket are directly integrated, and the bracket is adjacently installed next to the motor switch, so the body can be locked together with the motor switch on the motor. on the base plate of the electrical box.

The lock installed in the body has a key unit, preferably a lock that can be equipped with a key that can rotate at an angle, and the inside of the lock is a lock that is linked by the key unit. A control rod exposed outside the body is linked by the lock piece, preferably the control rod is in a U-shaped structure. The ㄇ-shaped control rod can be raised and lowered by the linkage of the lock, so that the action end of the ㄇ-shaped control rod can enter the test hole of the motor switch tripping mechanism when it descends, and press the tripping mechanism inside the motor switch to make the tripping The off-body protection does not make the motor switch act.

In order to match motor switches of different specifications, the control rod should preferably be disassembled and assembled with the lock. Therefore, for motor switches of different specifications, it is only necessary to replace the ㄇ-shaped control rods of different lengths and sizes.

Preferably, the main body is provided with an indication window, which can display the locked state of the lock. Therefore, even if the key of the lock is taken away by the maintenance personnel, and other third persons want to check the power failure of the main power supply, it is easy to know whether the power failure is due to forced power failure during maintenance or due to the status indicated by the indicator window. The motor switch itself is faulty and tripped. Of course, in order to allow the central control system or switchboard, etc., to understand the maintenance status of the motor switch through lights, it is preferable to further provide a micro switch in the body to be linked by the lock, and the body is externally provided with the The contact sockets of the shared (COM), normally open (NO), normally closed (NC) contacts of the micro switch are used for the indicator line to be connected to these contacts to achieve monitoring---especially the purpose of remote monitoring.

The utility model can be applied to a lock assembly for preventing misoperation of a motor switch, and has the following beneficial effects: the tripping mechanism of the power switch (CB) is forcibly locked by the safety lock, so that other personnel can be prevented from not operating at all during maintenance. The best way is to start the motor switch to achieve the effect of ensuring the safety of motor maintenance.

Description of drawings

The purpose, technical content, features and the achieved effects of this utility model are further described below through preferred specific embodiments and accompanying drawings.

Fig. 1 is a top view appearance schematic diagram of a lock assembly of the utility model applicable to motor switch protection against misoperation.

Fig. 2 is a schematic side view of the lock assembly which can be applied to the motor switch to prevent malfunction of the utility model, showing an embodiment of the connection method between the control rod and the lock.

Fig. 3 is a structural schematic diagram of the interlocking lock of the key unit in the utility model.

Description of main component symbols:

10. Body 11. Indication window 12. Lock 14. Bevel

15. Bare end 16. Bracket 18. Key unit 19. Key

20. Control rod 22. Action end 24. Connection end 26. Nut

30. Motor switch 32. Test hole 34. Handle

40. Substrate 50. Micro switch 52. Contact seat.

Detailed ways

The utility model can be applied to a lock assembly for preventing misoperation of a motor switch. So far, the most suitable motor switch 30 is a non-fuse switch for controlling a main power circuit.

The preferred embodiment of the lock assembly of the present utility model as shown in Figures 1 to 3 mainly includes a body 10, a lock 12 installed in the body 10, and a control rod exposed outside the body 10 20, the control rod 20 can be linked with the lock 12. The control rod 20 has an action end 22 which is smaller than the test hole 32 of the tripping mechanism of the motor switch 30, so that the action end 22 can press the tripping mechanism inside the motor switch 30 to prevent the tripping mechanism from moving, so as to Manipulate the forced power-off of the main power circuit through the motor switch 30 .

Preferably, a bracket 16 is fixed to the body 10, or the body 10 and the bracket 16 are directly integrated, and the bracket 16 is adjacently installed beside the motor switch 30, so the body 10 and the motor switch 30 can be It is locked on the base plate 40 of the distribution box for the motor.

The lock 12 installed in the body 10 has a key unit 18, preferably a lock with a key 19 that can be rotated, and the inside of the lock is a lock 12 linked by the key unit 18 . A preferred embodiment is shown in Figure 3. When the key 19 is turned, the slope 14 at the lower end of the key unit 18 can push the lock 12 up and down; An equivalent design. As shown in FIG. 2 , the lock 12 is linked with a control rod 20 exposed outside the body 10 . Preferably, the control rod 20 is in a U-shaped structure. The ㄇ-shaped control lever 20 is linked by the lock piece 12 and can be raised and lowered, so that the action end 22 of the ㄇ-shaped control lever 20 can enter the test hole 32 of the tripping mechanism of the motor switch 30 when descending, and press the inner part of the motor switch 30. The tripping mechanism shall be protected from action. This structure is as known to those skilled in the art, even if the handle 32 of pulling the motor switch 30 is also useless.

In order to match motor switches 30 of different specifications, the control rod 20 can be disassembled and assembled with the lock 12 as shown in FIG. Control lever 20 gets final product. A preferred embodiment is that a screw hole is provided at the exposed end 15 of the lock piece 12, and a screw is provided at the connecting end 24 of the opposite ㄇ-shaped control rod 20, and a nut 26 is used to lock the two after they are screwed together. position.

Preferably, the main body 10 is provided with an indicator window 11, which can display the locked status of the lock. Therefore, even if the key of the lock is taken away by the maintenance personnel, other third people will check the power failure of the main power supply, and it is easy to know whether the power failure is due to forced power failure during maintenance or the cause of the failure according to the state indicated by the indicator window 11. Because the motor switch 30 itself malfunctions and trips. Of course, in order to allow the central control system or switchboard, etc., to understand the maintenance status of the motor switch 30 through the lights, it is preferable to further provide a micro switch 50 in the body 10 to be linked by the lock, and the body 10 outside There are contact sockets 52 for wiring such as shared (COM) contacts, normally open (NO) contacts, and normally closed (NC) contacts of the microswitch 50, for indicating wires to be connected to these contacts to achieve monitoring, especially for remote monitoring purposes.

Although the foregoing description lists some preferred embodiments to illustrate the feasibility of the present utility model, as known, it is not intended to limit the present utility model. Anyone who is familiar with this technology can carry out some equivalent changes and modifications without departing from the spirit and protection scope of the present utility model, but they should still belong to the protection scope of the present utility model.

Claims (7)

1. A lock assembly applicable to motor switch protection against misoperation, which includes a body; a bracket fixing the body; a lock installed in the body, which has a key unit connected to a key unit A moving lock; and a control rod exposed outside the body, which can be linked with the lock; it is characterized in that: the control rod has an action end which is smaller than the test hole of the motor switch tripping mechanism, so that the When the action end is locked, it can enter the test hole and press the tripping mechanism inside the motor switch, the tripping mechanism will be protected from action, and the main power circuit via the motor switch will be forcibly cut off. 2. The lock assembly applicable to motor switch protection against misoperation according to claim 1, characterized in that: the body and the bracket are directly integrated. 3. The lock assembly applicable to motor switch protection against misoperation according to claim 1, characterized in that: said bracket is adjacently installed next to the motor switch. 4. The lock assembly applicable to motor switch protection against misoperation according to claim 1, characterized in that: the control rod is in a ㄇ-shaped structure. 5. The lock assembly applicable to motor switch protection against misoperation as claimed in claim 1, wherein the control rod is detachably assembled with the lock. 6. The lock assembly applicable to motor switch protection against misoperation as claimed in claim 1, wherein an indicator window is provided on the body to display the locked state of the lock. 7. The lock assembly applicable to motor switch protection against misoperation according to claim 1, characterized in that: there is another micro switch inside the body to be linked by the lock, and the micro switch is provided on the outside of the body. Shared, normally open and normally closed contacts of the automatic switch.

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