Emergency protection self-locking and self-recovery circuit in power equipment

Abstract

The utility model belongs to the field of electric power equipment, and discloses an emergency protection self-locking and self-recovery circuit in electric power equipment, which can monitor abnormal conditions such as misoperation or equipment failure in a charging process in real time through linkage control of a first relay switch KA1 and a second relay switch KA2. And the switch state change is fed back to a control system. Therefore, the system can carry out fault identification and alarm in time, so that equipment damage or potential safety hazards caused by misoperation are avoided. According to the self-recovery mechanism of the utility model, after emergency protection, the system can recover normal work through the first relay switch KA1 and the second relay switch KA2 without human intervention.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electric power equipment, concretely relates to an emergency protection self-locking and self-recovery circuit in electric power equipment. BACKGROUND

[0002] During the operation of the equipment, due to the complexity and uncontrollable factors of the on-site operation, there is often a risk of personnel misoperation. For example, due to operation errors, the equipment is disconnected or stopped running by someone on site. Such misoperation not only affects the normal use of the equipment, but also may cause a series of subsequent problems. First of all, after the equipment is disconnected, it cannot be directly recovered by remote means, and special maintenance personnel must be dispatched to the site for manual operation to restore the equipment operation. This approach significantly increases the cost of human maintenance and related travel expenses, especially for equipment deployed in remote areas or difficult-to-reach scenarios, which is more expensive.

[0003] In addition, on-site misoperation can also have a negative impact on the overall operation efficiency of the equipment. After the equipment is disconnected, it may cause data interruption, system restart or production process interruption, and in serious cases, it may cause irreversible damage to the entire production chain. Especially in some industrial scenarios that require high continuity, such as power, petrochemical or high-precision manufacturing industries, unexpected equipment downtime will directly affect product quality, energy consumption and market delivery cycle, causing additional economic losses.

[0004] The existing technology has certain limitations in solving such problems. Traditional protection mechanisms mainly rely on the experience of operators or simple physical protection measures, such as using safety switches, locking panels, etc., but these methods cannot completely avoid misoperation. In recent years, although some remote management and automatic recovery technologies have been developed, their application in complex environments still has deficiencies. For example, some remote technologies cannot detect misoperation in real time, or after the equipment is disconnected, they cannot remotely reset the operation, and still rely on manual on-site operation. SUMMARY

[0005] The utility model aims at overcoming the deficiency that remote technology cannot detect misoperation in real time, or after the equipment is disconnected, it cannot remotely reset the operation, and still relies on manual on-site operation, and provides an emergency protection self-locking and self-recovery circuit in electric power equipment.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of emergency protection self-locking and self-recovery circuit in electric power equipment, including first relay switch KA1 and second relay switch KA2, first relay switch KA1 is arranged in charging power supply anode, second relay switch KA2 is arranged in charging power supply cathode, and charging end is provided with charging switch, charging switch is in normal open state, first relay switch KA1 and second relay switch KA2 linkage control, and the switch state of first relay switch KA1 and second relay switch KA2 is opposite.

[0008] The utility model further improves, and second relay switch KA2 is arranged on A plate.

[0009] The utility model further improves, and first relay switch KA1 is arranged on A plate.

[0010] The utility model further improves, and first relay switch KA1 and second relay switch KA2 are all driven relay coil control.

[0011] The utility model further improves, and charging switch connects A plate and B plate.

[0012] The utility model further improves, and first relay switch KA1 and second relay switch KA2 are connected enable signal.

[0013] The utility model further improves, and first relay switch KA1 and second relay switch KA2 are connected TMU controller.

[0014] The utility model further improves, and TMU controller connects centralized control and platform.

[0015] Compared with prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses a first relay switch KA1 and second relay switch KA2's linkage control, and system can monitor the abnormal situation in real time in charging process, such as misoperation or equipment failure, and through the switch state change feedback to control system. In this way, system can be in time fault identification and alarm, thereby avoiding misoperation and leading to equipment damage or security risk. The self -restoring mechanism of the utility model makes in emergency protection, system can restore normal work through first relay switch KA1 and second relay switch KA2, and need not human intervention. Equipment recovery time can be controlled in the set time, thereby improving the reliability and response speed of equipment, reduces equipment downtime. The utility model discloses first relay switch KA1 and second relay switch KA2's linkage control, ensure that when appearing the fault, the positive and negative pole of charging power supply can be disconnected in time, avoid the security problem caused by single relay failure. This redundancy design improves the overall safety of system. The utility model discloses through the self -locking mechanism and avoids the occurrence of misoperation, only under the fault removal or explicit reset instruction, can restore the normal operation of equipment, thereby guaranteeing the safe operation of equipment. The utility model discloses through the self -restoring mechanism and the promotion of remote control, effectively solve the remote monitoring and cannot real -time detection misoperation, equipment disconnects and cannot reset etc. Through linkage control and self -locking function, system improves the safety, reliability, efficiency of equipment, and reduces manual intervention, improves the automation level of equipment. These designs make equipment can restore quickly when appearing the fault, and reduce the dependence of field operation, have great practical application value. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the system diagram of the utility model. DETAILED DESCRIPTION

[0018] For further understanding the contents of the utility model, the following combines the drawings and specific embodiment and describes the utility model in detail. It should be understood that the embodiment only explains the utility model and is not limited.

[0019] Referring to Figure 1 An emergency protection self-locking and self-recovery circuit in a power equipment, comprising a first relay switch KA1 and a second relay switch KA2, the first relay switch KA1 is arranged at the positive pole of a charging power supply, the second relay switch KA2 is arranged at the negative pole of the charging power supply, a charging switch is arranged at the charging end, the charging switch is in a normally open state, the first relay switch KA1 and the second relay switch KA2 are linked and controlled, and the switch states of the first relay switch KA1 and the second relay switch KA2 are opposite.

[0020] The first relay switch KA1 and the second relay switch KA2 are both located on board A. Both the first relay switch KA1 and the second relay switch KA2 are controlled by driving relay coils. The charging switch is connected to board A and board B. The first relay switch KA1 and the second relay switch KA2 are connected to the enable signal.

[0021] Preferably, the first relay switch KA1 and the second relay switch KA2 are connected to the TMU controller, and the TMU controller is connected to the central control and platform.

[0022] The emergency stop fault control method of this utility model is as follows:

[0023] When switch J2-5 is in the normal state and is pressed, the system enters the emergency stop state. After the emergency stop button is activated, the coils of the first relay switch KA1 and the second relay switch KA2 receive power, causing the contactor to operate accordingly. The normally open contact of the second relay switch KA2 becomes normally closed, forming a self-locking circuit to ensure that the emergency stop state is maintained.

[0024] The normally closed contact of the first relay switch KA1 changes to normally open, stopping the charging operation and further disconnecting the control circuit. The first relay switch KA1 changes from normally open to normally closed through the normally open contact, and the feedback signal is uploaded to the TMU controller. The information is then transmitted to the centralized control system and platform, notifying the system to enter the emergency stop state.

[0025] The unlocking method of this utility model is as follows:

[0026] 1. Users can deactivate J2-5 by clicking the screen or issuing a release emergency stop command through the platform. At this time, the self-locking circuit is released, the self-locking circuit is restored, the system is cleared of the fault state, and waits for 3 seconds for long-term enable.

[0027] 2. If the user presses and holds the emergency stop button for 5 seconds, the normally open contact of the second relay switch KA2 will become normally closed, and the signal will be fed back to the TMU controller. The TMU controller will then issue a command to cancel the J2-5 enable, restore the self-locking circuit, and clear the fault. After clearing the emergency stop fault, the system will wait for 3 seconds before performing a long-term enable operation.

[0028] This invention achieves self-locking of the trigger circuit, stopping charging and providing feedback signals to ensure that the device stops running and enters a safe state. The unlocking operation can be performed through the interface or by pressing and holding the emergency stop button to release the self-locking circuit and restore the device's operation, ensuring that the system can continue to work after the fault is cleared.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. An emergency protection self-locking and self-recovery circuit for power equipment, characterized in that, It includes a first relay switch KA1 and a second relay switch KA2. The first relay switch KA1 is set at the positive terminal of the charging power supply, and the second relay switch KA2 is set at the negative terminal of the charging power supply. A charging switch is set at the charging end. The charging switch is in the normally open state. The first relay switch KA1 and the second relay switch KA2 are linked and controlled, and the switching states of the first relay switch KA1 and the second relay switch KA2 are opposite.

2. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, The second relay switch KA2 is installed on board A.

3. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, The first relay switch KA1 is installed on board A.

4. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, Both the first relay switch KA1 and the second relay switch KA2 are controlled by driving relay coils.

5. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, The charging switch connects board A and board B.

6. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, The first relay switch KA1 and the second relay switch KA2 are connected to the enable signal.

7. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, The first relay switch KA1 and the second relay switch KA2 are connected to the TMU controller.

8. The emergency protection self-locking and self-recovery circuit in power equipment according to claim 1, characterized in that, The TMU controller connects the central control unit and the platform.

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