Electrical control box with anti-misoperation locking function

Abstract

The utility model relates to an electrical control box with an anti-misoperation locking function. The utility model aims to provide the electrical control box with the anti-misoperation locking function, which is safe, high in efficiency, strong in anti-electric shock performance and long in service life. The utility model relates to an electrical control box with anti-misoperation locking, which comprises a box body, a first box door and a circuit breaker, the circuit breaker is arranged in the box body, the circuit breaker is provided with a main contact and an auxiliary contact in opposite linkage with the main contact, the auxiliary contact is closed when the main contact is disconnected, and the auxiliary contact is disconnected when the main contact is closed; the first box door is provided with an electromagnetic lock and a control mechanism for controlling the on-off of the circuit breaker, the electromagnetic lock is electrically connected with the auxiliary contact to form a control loop, and the control mechanism penetrates through the first box door and is rigidly connected with the circuit breaker.

Description

Technical Field

[0001] This utility model relates to an electrical control box, and more particularly to an electrical control box with an anti-misoperation interlock. Background Technology

[0002] In electrical systems, most power distribution control boxes are protected by adding a protective lock to the box door. When opening the box, the lock is opened with a key to enter the control box and perform related operations on circuit breakers and other circuit components. After opening the box, the internal circuit is in a closed operating state, and it is impossible to prevent the box from being forcibly opened while it is energized. Moreover, most control boxes are three-phase high-voltage control boxes, which can easily cause electric shock accidents and cannot guarantee the personal safety of the staff.

[0003] Furthermore, external protective lock control boxes are prone to rust and aging during long-term use, which may cause the box to be unable to be opened during maintenance or repair, or the protective lock to fall off due to aging, thus increasing the risk of damage to the electrical equipment inside the control box. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an electrical control box with anti-misoperation interlock that is safe, efficient, has strong anti-electric shock performance, and long service life.

[0005] This utility model discloses an electrical control box with anti-misoperation interlocking, comprising a box body, a first box door, and a circuit breaker. The circuit breaker is disposed inside the box body and is provided with main contacts and auxiliary contacts that are linked in opposite states. When the main contacts are open, the auxiliary contacts are closed, and when the main contacts are closed, the auxiliary contacts are open. The first box door is provided with an electromagnetic lock and a control mechanism for controlling the on and off of the circuit breaker. The electromagnetic lock is electrically connected to the auxiliary contacts to form a control circuit, and the control mechanism passes through the first box door and is rigidly connected to the circuit breaker.

[0006] This utility model discloses an electrical control box with anti-misoperation interlocking, wherein the electromagnetic lock is a DSN electromagnetic lock.

[0007] This utility model discloses an electrical control box with anti-misoperation interlock, wherein the control mechanism includes an operating handle and an operating shaft. The operating handle is rotatably mounted on the outer wall of the first box door. One end of the operating shaft is detachably inserted into a slot provided in the operating handle, and the other end of the operating shaft is fixedly inserted into the operating interface of the circuit breaker. The operating handle is connected to the keyway of the operating shaft.

[0008] This utility model discloses an electrical control box with an anti-misoperation interlock, which also includes a second box door located outside the first box door.

[0009] This utility model discloses an electrical control box with anti-misoperation interlock, wherein the second box door is provided with multiple observation windows.

[0010] This utility model discloses an electrical control box with an anti-misoperation interlock, wherein the second box door is also equipped with a mechanical lock.

[0011] The difference between this utility model and existing technologies lies in its double-door structure, with the second door located outside the first door. A circuit breaker with main contacts and auxiliary contacts in opposite states is installed inside the enclosure. The main contacts are connected to the circuit system, while the auxiliary contacts are electrically connected to an electromagnetic lock. By controlling the closing and opening of the main contacts, the opening and closing of the auxiliary contacts are controlled, thus controlling the opening and closing of the electromagnetic lock, thereby controlling the opening and closing of the second door. This achieves a specific purpose.

[0012] The electrical control box with anti-misoperation interlock of this utility model has at least the following beneficial effects:

[0013] (1) The double-door structure can not only improve the space utilization of the electrical control box, but also prevent the first door and the control mechanism and electromagnetic lock on the first door from directly contacting the outside world, thus playing a protective role, thereby extending the service life of the electrical control box and reducing the risk of electric shock to the staff.

[0014] (2) The cooperation between the control mechanism on the first box door, the circuit breaker, and the electromagnetic lock ensures that the electrical control box can only be opened when the circuit breaker is de-energized, effectively preventing staff from accidentally opening the box door while the electrical control box is energized and reducing the risk of electric shock.

[0015] (3) In actual maintenance, this electrical control box is highly flexible. If only the meter needs to be repaired, the staff only needs to open the second box door to operate it; if the electrical equipment in the first box door needs to be repaired and maintained, the second box door should be opened first, thereby improving work efficiency.

[0016] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first door installed on the box body in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure in which the second door is installed on the box body in this utility model;

[0019] Figure 3 This is a side view structural diagram of an electrical control box with anti-misoperation interlock according to the present invention;

[0020] Figure 4 This is a power supply diagram of an electrical control box with anti-misoperation interlock according to the present invention.

[0021] Figure label:

[0022] 01-Box body; 02-Circuit breaker; 03-First box door; 31-Electromagnetic lock; 311-Rotating handle; 312-Lock tongue; 313-Emergency lock hole; 32-Control mechanism; 321-Operating handle; 322-Operating shaft; 04-Second box door; 41-Observation window; 42-Mechanical lock; 43-Changeover switch. Detailed Implementation

[0023] like Figure 1 , 2 As shown, this utility model discloses an electrical control box with anti-misoperation interlocking, including a box body 01, a first box door 03, and a circuit breaker 02. The circuit breaker 02 is installed inside the box body 01. The circuit breaker 02 is provided with a main contact S and an auxiliary contact KA that is linked to the main contact S in the opposite direction. When the main contact S is open, the auxiliary contact KA is closed, and when the main contact S is closed, the auxiliary contact KA is open. The first box door 03 is provided with an electromagnetic lock 31 and a control mechanism 32 that controls the opening and closing of the circuit breaker 02. The electromagnetic lock 31 is electrically connected to the auxiliary contact KA to form a control circuit. The control mechanism 32 passes through the first box door 03 and is rigidly connected to the circuit breaker 02.

[0024] To ensure the safe operation of the three-phase circuit system and to prevent electric shock accidents caused by staff accidentally opening the box door while it is powered on, the following electrical control box system was designed.

[0025] The electrical control box contains a three-phase circuit breaker 02 for a three-phase circuit system. The main contacts S on the circuit breaker 02 are used to connect the circuit system. The auxiliary contact KA is linked to the main contact S via a mechanical linkage or shaft and has the opposite state (i.e., the auxiliary contact KA is closed when the main contact S is open, and the auxiliary contact KA is open when the main contact S is closed). Moreover, the auxiliary contact KA is a normally closed contact. The opening and closing of the auxiliary contact KA can be controlled simply by controlling the opening and closing of the main contact S. The control process is relatively simple and facilitates the control of the opening and closing of the electromagnetic lock 31.

[0026] The enclosure 01 is equipped with a first door 03 for entry and exit. The electromagnetic lock 31 is a DSN electromagnetic lock 31 with a rotating handle 311. The electromagnetic lock 31 is installed on the first door 03 according to the actual position of the door and is electrically connected to the auxiliary contact KA of the circuit breaker 02. The opening and closing of the first door 03 can be controlled by controlling the on / off state of the electromagnetic lock 31. The first door 03 can be made of sturdy and wear-resistant insulating materials, such as polypropylene and polyvinyl chloride, which not only protects the electrical components inside the electrical control box but also prevents electric shock to personnel. Its inherent insulation further reduces the risk of accidental electric shock to personnel.

[0027] It should be noted that the DSN electromagnetic lock 31 is equipped with an electromagnetic coil L, a locking plate, a locking tongue 312, a rotary handle 311 for controlling the extension and retraction of the locking tongue 312, an indicator light H, and a push-button switch M. Its working principle is as follows:

[0028] like Figure 4 As shown, when the auxiliary contact of circuit breaker 02 is energized, the electromagnetic lock 31 is in a state that can be controlled by the push button switch M. When the push button switch M is pressed, the current flows through the electromagnetic coil L. Under the principle of electromagnetic induction, the electromagnetic coil L generates a magnetic force, which attracts the locking plate of the locking tongue 312. At the same time, the indicator light H lights up. At this time, rotating the rotary handle 311 can realize the extension and retraction of the locking tongue 312, that is, the electromagnetic lock 31 is opened. At this time, the first box door 03 can be opened by rotating the handle 311.

[0029] Afterwards, close the first box door 03 and turn the rotary handle 311 to lock the first box door 03 through the locking tongue 312. Then press the button switch M again, the indicator light H goes out, and the electromagnetic coil L is de-energized. At this time, the lock plate returns to its position and locks the locking tongue 312. The rotary handle 311, which controls the extension and retraction of the locking tongue 312, cannot be turned, that is, the electromagnetic lock 31 is locked. At this time, the first box door is closed and cannot be opened.

[0030] The control mechanism 32 is installed on the outer wall of the first box door 03 through the first box door 03 and is rigidly connected to the circuit breaker 02 inside the box. By operating the control mechanism 32 outside the box body 01, the main contacts S of the circuit breaker 02 can be controlled to open and close, thereby controlling the on and off of the electromagnetic lock 31, and thus controlling the opening and closing of the first box door 03.

[0031] Door opening procedure:

[0032] In actual use, if it is necessary to open the first box door 03, first operate the control mechanism 32 to disconnect the main contact S of the circuit breaker 02 from the circuit system. At this time, the normally closed auxiliary contact KA of the circuit breaker 02 is energized (that is, the auxiliary contact KA is in the closed state). Then press the button switch M of the electromagnetic lock 31, the indicator light H lights up, then rotate the rotating handle 311 of the electromagnetic lock 31 to retract the lock tongue 312 from the lock groove of the box 01, and finally pull the rotating handle 311 to open the first box door 03.

[0033] Door closing procedure:

[0034] When it is necessary to close the first door 03 to restore the circuit system, first close the first door 03, then turn the rotary handle 311 on the electromagnetic lock 31 to control the latch 312 to extend and engage in the lock groove on the box 01, then press the button switch M of the electromagnetic lock 31, the indicator light H goes out, and finally operate the control mechanism 32 to connect the main contact S of the circuit breaker 02 to the circuit system (at this time, the auxiliary contact KA is in the open state), and the circuit system is restored to power.

[0035] When the main contact S of circuit breaker 02 is closed and the circuit system is in normal operation, the electromagnetic lock 31 is de-energized and automatically locks, preventing the first door 03 from opening or closing. This effectively prevents personnel from accidentally opening the door while the electrical control box is energized and reduces the risk of electric shock.

[0036] like Figure 1 As shown, the control mechanism 32 includes an operating handle 321 and an operating shaft 322. The operating handle 321 is rotatably mounted on the outer wall of the first door 03. One end of the operating shaft 322 is detachably inserted into the slot provided in the operating handle 321, and the other end of the operating shaft 322 is fixedly inserted into the operating interface of the circuit breaker 02. The operating handle 321 and the operating shaft 322 are connected by a keyway.

[0037] The operating handle 321 is equipped with a fixed seat. The operating handle 321 is rotatably mounted in the fixed seat via a rotating shaft or bearing. The first box door 03 is designed as a rotating door with a through hole. The fixed seat is fixed to the first box door 03 by bolts. At this time, the operating shaft 322 is located in the through hole of the first box door 03, so that the operating handle 321 can rotate flexibly on the first box door 03 and achieve linkage with the circuit breaker 02 and the operating shaft 322 inside the box.

[0038] The operating shaft 322 is prismatic, such as cuboid. The operating handle 321 is provided with a prismatic groove that matches it. The left end of the operating shaft 322 is inserted into the prismatic groove of the operating handle 321, and the right end is fixed in the operating interface of the circuit breaker 02. The operating interface of the circuit breaker 02 is also provided with a prismatic groove that matches the operating shaft 322. The operating shaft 322 is firmly fixed by the prismatic groove to prevent it from falling off.

[0039] To save costs, the first door 03 is designed as a rotating door. When the first door 03 is opened and closed, in order to avoid friction between the operating shaft 322 and the groove of the operating handle 321, which would hinder the opening of the first door 03, the groove on the operating handle 321 can be set to a matching arc groove according to the rotation arc of the first door 03, and the two are reserved with a fitting gap of 0.1 mm to 0.3 mm. At the same time, a chamfer of a certain arc is set on the operating shaft 322 and the arc groove to reduce the friction between the operating shaft 322 and the operating handle 321, ensuring that the first door 03 opens and closes smoothly.

[0040] In use, rotating the operating handle 321 will drive the operating shaft 322 to rotate, thereby achieving the closing or opening of the circuit breaker 02.

[0041] When the first door 03 needs to be opened, first turn the operating handle 321 clockwise or counterclockwise. The rotation of the operating handle 321 drives the operating shaft 322 to rotate. When the operating shaft 322 rotates, the circuit breaker 02 switch is disconnected, that is, the main contact S of the circuit breaker 02 is disconnected from the circuit system, the normally closed auxiliary contact KA is energized, and the electromagnetic lock 31 is energized. Turn the rotating handle 311 of the electromagnetic lock 31 to open the electromagnetic lock 31, and the first door 03 can be opened smoothly.

[0042] When it is necessary to close the first box door 03, first close the first box door 03, then turn the electromagnetic lock 31 and rotate the handle 311 to lock it. Then turn the operating handle 321 counterclockwise or clockwise. Similarly, the operating handle 321 drives the operating shaft 322 to rotate synchronously. When the operating shaft 322 rotates, the circuit breaker 02 switch is closed, that is, the main contact S of the circuit breaker 02 is reconnected to the circuit system, the normally closed auxiliary contact KA is opened, and the electromagnetic lock 31 is de-energized. At this time, the box door cannot be opened.

[0043] The electromagnetic lock 31 is equipped with an emergency lock hole 313. When an accident causes the electromagnetic lock 31 to fail to be powered on and open or close, it can be opened with a special key through the emergency lock hole 313.

[0044] The cooperation between the control mechanism 32 on the first door 03, the circuit breaker 02, and the electromagnetic lock 31 ensures that the electrical control box can only be opened when the circuit breaker 02 is de-energized. This effectively prevents staff from accidentally opening the door while the electrical control box is energized and reduces the risk of electric shock.

[0045] like Figure 3 As shown, the electrical control box with anti-misoperation interlocking of this utility model also includes a second door 04, which is located outside the first door 03. The second door 04 is provided with multiple observation windows 41. The second door 04 is also provided with a mechanical lock 42.

[0046] The enclosure 01 is also equipped with a second door 04, forming a double-door structure. The second door 04 is located outside the first door 03, meaning that the first door 03 can only be seen after the second door 04 is opened. The two doors are spaced a certain distance apart, providing ample space for the installation of other electrical equipment. The second door 04 not only improves the space utilization of the electrical control box, but also prevents the first door 03 and its control mechanism 32 and electromagnetic lock 31 from direct contact with the outside world, thus providing protection, extending the service life of the electrical control box, and reducing the risk of electric shock to workers.

[0047] Between the two boxes, an ammeter, a voltmeter, and an energy meter connected to the three-phase circuit are installed. The second box 04 is equipped with observation windows 41, which are the same number and position as the meters. Each observation window 41 is equipped with a transparent plate, which facilitates observation of the meter data and prevents rain or dust from entering.

[0048] A selector switch 43 is also installed on the second door 04. The selector switch 43 is reasonably connected to different lines in the three-phase circuit. By rotating the selector switch 43, the circuit connected to the voltmeter can be switched, so that the voltage data of each circuit can be displayed on the voltmeter. In this way, the staff can read the relevant circuit data without opening the box.

[0049] In actual maintenance, this electrical control box is highly flexible. If only the meter needs to be repaired, the staff only needs to open the second door 04 to operate it; if the electrical equipment in the first door 03 needs to be repaired and maintained, the second door 04 should be opened first and then the first door 03 should be opened, thereby improving work efficiency.

[0050] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An electrical control box with anti-misoperation interlock, characterized in that: It includes a housing, a first door, and a circuit breaker. The circuit breaker is installed inside the housing. The circuit breaker is equipped with a main contact and an auxiliary contact that is linked to the main contact in the opposite direction. When the main contact is open, the auxiliary contact is closed, and when the main contact is closed, the auxiliary contact is open. The first enclosure door is equipped with an electromagnetic lock and a control mechanism for controlling the on / off state of the circuit breaker. The electromagnetic lock is electrically connected to the auxiliary contacts to form a control circuit, and the control mechanism passes through the first enclosure door and is rigidly connected to the circuit breaker.

2. An electrical control box with anti-misoperation interlocking as described in claim 1, characterized in that: The electromagnetic lock is a DSN electromagnetic lock.

3. An electrical control box with anti-misoperation interlocking as described in claim 2, characterized in that: The control mechanism includes an operating handle and an operating shaft. The operating handle is rotatably mounted on the outer wall of the first cabinet door. One end of the operating shaft is detachably inserted into a slot provided in the operating handle, and the other end of the operating shaft is fixedly inserted into the operating interface of the circuit breaker. The operating handle is connected to the keyway of the operating shaft.

4. An electrical control box with anti-misoperation interlocking as described in claim 3, characterized in that: It also includes a second door, which is located outside the first door.

5. An electrical control box with anti-misoperation interlocking as described in claim 4, characterized in that: The second box door is equipped with multiple observation windows.

6. An electrical control box with anti-misoperation interlocking according to claim 5, characterized in that: The second compartment door is also equipped with a mechanical lock.

Images