Locking mechanism of low-voltage draw-out type switch cabinet

Abstract

A locking mechanism of a low-voltage draw-out type switch cabinet belongs to the technical field of switch cabinet auxiliary equipment and comprises a password control switch, a wireless transmitting module, an electromagnetic lock, an electric push rod, a relay and a receiving circuit. The password control switch, the wireless transmitting module and the relay are installed in the element box, the electromagnetic door lock is installed on the inner side of the switch cabinet, a main electric brake handle of the switch cabinet is rotationally connected with the upper end of the electric push rod, and the power output end of the password control switch is electrically connected with the power input ends of the electromagnetic door lock and the electric push rod. The safety protection device is used in cooperation with the draw-out type low-voltage cabinet, related personnel who know passwords can open the electromagnetic door lock and then operate related electrical equipment in the cabinet body, the safety risk caused by misoperation of other irrelevant personnel on a main electric brake is prevented, and a good safety effect is achieved; when a main power supply is powered off, related workers can be prompted in a wireless mode in time, the related workers can recover field power supply in a relatively faster time, and electric equipment can recover a normal working state in time.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment of a distribution cabinet, in particular to a locking mechanism of a low-voltage draw-out switch cabinet. Background Art

[0002] A withdrawable low-voltage cabinet is a device responsible for controlling, protecting, converting, and distributing electrical energy in a low-voltage power supply system. It primarily consists of busbars, electrical components (including disconnectors, circuit breakers, fuses, contactors, and thermal relays), instruments, drawers, and a cabinet body. (The cabinet typically has multiple drawers, with the electrical components for the incoming and outgoing wiring circuits installed in separate removable drawers. Each drawer forms a functional unit capable of performing a specific power supply task. Depending on the cabinet's appearance, some drawers are located outside the cabinet, while others are located behind the cabinet door.)

[0003] With the development of industrial technology, the technology of withdrawable low-voltage cabinets has also been improved. my country's authorized patent number "202021466566.0" and patent name "A withdrawable low-voltage cabinet" records that "the outer side of the side wall of the withdrawable cabinet is provided with a slider that cooperates with the inner slide groove of the main body, which is convenient for the positioning and installation of the withdrawable cabinet and has a simple structure; vertical air holes are opened on the side wall and the upper and lower sides of the slider, which can increase the heat dissipation duct of the withdrawable cabinet and facilitate heat dissipation; staggered, long, rounded slots are opened on the bottom plate, which can dissipate heat and have little effect on the strength of the bottom plate. They can be used to install various components and devices in the withdrawable cabinet, and the installation position can be flexibly adjusted, that is, the requirements for various components and devices are low; a protective top for dust and rain protection is provided above the main body, which enhances the protection of the utility model and improves the safety of use." As can be seen from the above, although the comparative patent has achieved the technical effect of the invention described therein to a certain extent, it is limited by its structure and function, and, like the existing withdrawable low-voltage cabinet, still has the following technical problems. First, it does not have a good anti-misoperation function. When unauthorized personnel operate the power on and off without knowing it, there is a significant safety hazard (for example, during the power outage maintenance phase, if other personnel turn on the switch, there is a risk of electric shock to the personnel repairing the equipment). Second, when the main power supply is cut off, the relevant staff cannot be notified in a timely manner. When the relevant staff do not learn about the power outage in a timely manner for various reasons, the power supply cannot be restored in time, which will cause the electrical equipment to not resume normal operation in a timely manner. Utility Model Content

[0004] In order to overcome the drawbacks of the existing withdrawable low-voltage cabinets as described in the background due to the structural limitations and the lack of a safety protection device, the present invention provides a cooperative withdrawable low-voltage cabinet. In application, only personnel who know the corresponding password of the password switch can open the cabinet door to operate the relevant electrical equipment and the main switch in the cabinet, thereby preventing the safety risks of other unrelated personnel being unaware and misoperating the main switch on or off. In addition, when there is a power outage at the main power input end, the locking mechanism of the low-voltage withdrawable switch cabinet can promptly notify the relevant staff wirelessly, thereby enabling the relevant staff to restore on-site power supply relatively quickly and the relevant electrical equipment to resume working status in time.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A locking mechanism for a low-voltage withdrawable switch cabinet comprises a password-controlled switch, a wireless transmitting module, an electromagnetic door lock, an electric push rod, and a relay, and is characterized in that it also has a receiving circuit; the password-controlled switch, wireless transmitting module, and relay are installed in a component box, and the component box is installed on the front outer side of the cabinet door of the low-voltage withdrawable switch cabinet; a fixing seat is installed at the front end of the cabinet body of the low-voltage withdrawable switch cabinet, and the electromagnetic door lock is installed on one side of the front inner part of the cabinet door; a connecting shaft is rotatably installed at the upper end of the main switch operating handle of the low-voltage withdrawable switch cabinet, and the lower end of the electric push rod is rotatably installed at the front lower part of the main switch housing, and the upper end of the electric push rod is rotatably connected to one end of the connecting shaft; the relay is electrically connected to the main input power supply end of the low-voltage withdrawable switch cabinet; the power output end of the relay is electrically connected to one end of the power input of the wireless transmitting circuit module; the power output end of the password-controlled switch is electrically connected to the power input ends of the electromagnetic door lock and the electric push rod, respectively.

[0007] Preferably, there are limit plates on both sides of the connecting shaft.

[0008] Preferably, the lock core of the electromagnetic door lock and the hollow portion of the fixing seat are in the same plane.

[0009] Preferably, the password-controlled switch is equipped with three electrically connected power switches, one end of the first power switch is connected to the positive power input end of the password-controlled switch, and the positive power output end of the password-controlled switch is connected to the positive power input ends of the second power switch and the third power switch.

[0010] Preferably, the receiving circuit includes a wireless receiving circuit module and a buzzer which are electrically connected in the housing, and the power input end of the buzzer is connected to the power output end of the wireless receiving circuit module.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) When using the new cooperative withdrawable low-voltage cabinet, only personnel who know the corresponding password of the password control switch can open the electromagnetic door lock and then operate the relevant electrical equipment and the main switch in the cabinet. In this way, the safety risk of other unrelated personnel being unaware and misoperating the main switch on or off is prevented, and a good safety effect is achieved; (2) Under the joint action of the receiving circuit, relay, etc., when the main power input end is cut off, the relevant staff can be promptly notified wirelessly, so that the relevant staff can restore the on-site power supply relatively quickly and the relevant electrical equipment can be restored to normal working state in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a partial structural diagram of the utility model.

[0015] Figure 3 、 4 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 、 2 As shown in Figures 3 and 4, a locking mechanism of a low-voltage withdrawable switch cabinet includes a battery G1, a power module W1, a password control switch W2, a wireless transmission module W3, an electromagnetic door lock DC, a small electric push rod M1, and a relay J1. It also has a receiving circuit 1; the battery G1, the power module W1, the password control switch W2, the wireless transmission module W3, and the relay J1 are installed in a component box 2, which is installed on the upper part of the front outer side of the cabinet door 31 of the low-voltage withdrawable switch cabinet 3, and the operation interface of the password control switch W2 is located on the component box 2. Box 2 is open at the front end. A "mouth"-shaped mounting bracket 32 is welded to the center of the front right end of the low-voltage withdrawable switchgear 3's frame. The electromagnetic door lock DC is mounted transversely to the center of the front right end of the inside of the cabinet door 31. The operating handle of the low-voltage withdrawable switchgear's main switch 33 has a transverse through-hole at the front end, into which a connecting shaft 34 is rotatably mounted. The lower end of the cylinder of the electric push rod M1 is rotatably mounted to the lower right front end of the main switch 33 housing. The upper end of the push rod of the electric push rod M1 has a transverse through-hole A, into which the right end of the connecting shaft 34 is rotatably mounted. The receiving circuit 1 is carried by personnel.

[0017] Figure 1 、 2As shown in Figures 3 and 4, a stopper plate 35 with an outer diameter larger than the inner diameter of the through hole and through hole A is welded on each side of the connecting shaft (to prevent the connecting shaft from slipping out). The lock core of the electromagnetic door lock DC and the left hollow portion of the fixing base 32 are aligned. When the cabinet door 31 is closed, the lock core of the electromagnetic door lock DC is located within the fixing base 32. The two lower terminals of the first wireless signal transmission button D1 of the wireless transmission circuit module W3 are connected together via a wire. The password control switch W2 is equipped with three power switches connected by wires. One end of the first power switch S1 is connected to the positive power input pin 1 of the password control switch W2. The positive power output pin 3 of the password control switch W2 is connected to the positive power input pin 1 of the second power switch S2 and the third power switch S3. The power output of the first power switch S1 is connected to the positive power input of the electromagnetic door lock DC. The negative power output pin 4 of the password control switch W2 is connected to the negative power input pin 2 of the electromagnetic door lock DC and the third power switch S3. The receiving circuit includes a battery AG2, a charging socket CZ1, a wireless receiving circuit module W4, a power switch AS4, and a buzzer B, which are housed in a housing 4 and connected via circuit board wiring. The two poles of battery AG2 are connected to the two ends of the charging socket CZ1 (when battery AG2 is out of power, an external 12V power charger plug can be inserted into the jack of the charging socket CZ1 to charge battery AG2; specifically, the jack of the charging socket CZ1 is located outside the front opening of the housing 4). The power switch AS4 is connected in series with the power input terminals 1 and 2 of the wireless receiving circuit module W4, respectively. The power input terminals of the buzzer B are connected to the power output terminals 3 and 2 of the wireless receiving circuit module W4, respectively. Figure 3 、 4In the embodiment, the relay J1 is an AC220V relay; the power module W1 is a finished product of an AC220V to DC12V switching power module; the electromagnetic door lock DC is a model JB03 small oblique electromagnetic door lock; the battery G1 is a finished product of a model 12V / 5Ah battery; the password control switch W2 is a finished product of a password control switch of model RFID6 (12V) (it works in a self-locking mode, after the power input end is powered and multiple password power switches are pressed correctly, the power output port continues to output power until the power is cut off), it has two power input ports, two power output ports (with normally closed and normally open power output ports, in this embodiment, the normally closed power output port is left unconnected), 12 password buttons (respectively 1, 2, 3, 4, 5, 6, 7) , 8, 9, 0, *, #), the function of the switch itself can be controlled by password before use, and the corresponding password number can be set; the micro electric push rod M1 is a small reciprocating electric telescopic rod with a power of 5W (the upper and lower ends of the cylinder are respectively provided with limit switches; when the push column moves up or down to the stop point, the motor of the electric push rod will lose power and can only be powered by reverse input power); the wireless transmitting circuit module W3 (with two signal transmitting buttons) and the wireless receiving circuit module W4 (with two high-level output ports) are 3000-meter wireless remote control and receiving component products (with the same structure as the automotive wireless remote control receiving device); the buzzer B is a high-decibel active buzzer model HND-4216; the battery AG2 is a 12V / 2Ah battery product. Figure 3 、 4 All components are mature industrial products, and this application does not elaborate on their working principles.

[0018] Figure 1 、 2As shown in Figures 3 and 4, the power input of relay J1, power input pins 1 and 2 of power module W1, and the total power input of the low-voltage withdrawable switchgear are connected via wires (one phase and neutral wire of a three-phase four-wire power cable, or two power wires from the total power input of a 220V low-voltage withdrawable switchgear). Power output pins 3 and 4 of power module W1 are connected to the two poles of battery G1, the power input of password control switch W2, the other end of power switch S1, and the negative power input pin 2 of password control switch W2. The control power input of relay J1 is connected to the positive power output pin 3 of power module W1 via wire. The normally closed contact of relay J1 is connected to the positive power input pin 1 of wireless transmitter circuit module W3 via wire. The negative power input pin 2 of wireless transmitter circuit module W3 is connected to the negative power output pin 4 of power module W1 via wire. The control power input of relay J1 is connected to the positive power output pin 3 of power module W1 via wire. The other end of power switch S2, the negative power output terminal (pin 4) of password control switch W2, and the power input terminal of the electromagnetic door lock DC are connected via wires. The positive and negative power input terminals of electric actuator M1, as well as the negative and positive power input terminals, are connected to the power output terminals (pins 3, 4) and (pins 5, 6) of power switch S3, respectively. The handles of the three power switches are located outside the three openings at the front of the component box.

[0019] Figure 1 、 2As shown in Figures 3 and 4, this new collaborative withdrawable low-voltage cabinet 3 operates. After 220V AC power enters the power input of power module W1, pins 3 and 4 of power module W1 output 12V DC power, which is then fed into battery G1 (which can continue to power related circuits in the event of a subsequent power outage at the main power input), as well as the power input of the password control switch and the control power input of relay J1. If unauthorized personnel do not know the correct password for password control switch W2, they will be unable to open the cabinet door or operate electric actuator M1 to open or close main switch 3. If the relevant personnel needs to open the cabinet door or operate the switch, after turning on the power switch S1, the control switch W2 is energized and works. The relevant personnel knows the password number of the password control switch W2 (for example, 4, 6, 3, 8, 5), and uses their fingers to operate the corresponding multiple touch keys of the control switch W2 in sequence. Pins 3 and 4 of the password control switch W2 output power. At this moment, the relevant personnel turns on the power switch S2, the electromagnetic door lock DC is energized and its valve core moves to the left. In this way, the valve core of the electromagnetic door lock DC is separated from the fixing seat 32, and the relevant personnel can pull the cabinet door forward, and then can operate the relevant electrical equipment in the low-voltage withdrawable switch cabinet; when pins 3 and 4 of the password control switch W2 output power, the relevant personnel needs to control the main switch 33. When opening or closing the switch, turn the handle of the power switch S3 to the left or right, and the 1, 2 pins and 3, 4 pins and 5, 6 pins of the power switch S3 are connected respectively. In this way, the positive and negative or negative and positive power input terminals of the electric push rod M1 will be energized. After the positive and negative poles of the electric push rod M1 are energized, its push column pushes the handle of the main switch upward to the stop point (at this moment, the push column of the electric push rod just moves upward to the stop point), and the main switch 33 is in the closed state to supply power to the relevant electrical equipment and terminal electrical equipment in the cabinet; after the negative and positive poles of the electric push rod M1 are energized, its push column drives the handle of the main switch downward to the stop point (at this moment, the push column of the electric push rod just moves downward to the stop point), the main switch 33 is in the open state, and the relevant electrical equipment and terminal electrical equipment in the cabinet lose power. When the cabinet door 31 needs to be closed, the relevant personnel pushes the cabinet door backward and then turns off the power switch S1. In this way, the electromagnetic door lock DC and the power switches S2 and S3 lose power (the power switches S2 and S3 are turned off synchronously). When the electromagnetic door lock DC loses power, its valve core enters the fixed seat 32 and the cabinet door is closed.

[0020] Figure 1 、 2As shown in Figures 3 and 4, when the main power input terminal of the withdrawable low-voltage cabinet 3 is not de-energized, the relay J1 is energized to close its control power input terminal and the normally closed contact terminal, and the wireless transmitting circuit module W3 will not transmit the first wireless closing signal; when the main power input terminal of the withdrawable low-voltage cabinet 3 is de-energized, the relay J1 is de-energized and no longer closes its control power input terminal and the normally closed contact terminal, and the wireless transmitting circuit module W3 will be energized to work. Since the two lower terminals of the first wireless signal transmitting button D1 of the wireless transmitting circuit module W3 are connected together by a wire, the wireless transmitting circuit module W3 will transmit the first wireless closing signal. When relevant personnel are not on-site, turning on power switch AS4 energizes wireless receiving circuit module W4, and wireless transmitting circuit module W3 transmits the first wireless closing signal. Within a 3000-meter range, upon receiving the wireless closing signal, wireless receiving circuit module W4 outputs a high level at pin 3, which enters the positive power input of buzzer B. Buzzer B is energized and sounds, promptly alerting relevant personnel who are not on-site and the on-site main power input terminal to a power outage. Through all of the above technical solutions, this new device prevents the safety risk of uninformed personnel accidentally opening or disconnecting the main power switch, achieving excellent safety benefits. In the event of a power outage at the main power input terminal, it promptly notifies relevant personnel wirelessly, allowing related electrical equipment to resume normal operation (for example, if a transformer connected to the main power input terminal of a withdrawable low-voltage cabinet fails, the fault can be promptly addressed and power restored).

[0021] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A locking mechanism for a low-voltage withdrawable switch cabinet, comprising a password-controlled switch, a wireless transmitter module, an electromagnetic door lock, an electric push rod, and a relay, characterized in that: It also has a receiving circuit; the password control switch, wireless transmission module, and relay are installed in the component box, and the component box is installed on the front outer side of the cabinet door of the low-voltage withdrawable switch cabinet; a fixing seat is installed at the front end of the cabinet body of the low-voltage withdrawable switch cabinet, and the electromagnetic door lock is installed on the front side of the cabinet door; the upper end of the main switch operating handle of the low-voltage withdrawable switch cabinet is rotatably installed with a connecting shaft, and the lower end of the electric push rod is rotatably installed on the front lower part of the main switch housing, and the upper end of the electric push rod is rotatably connected to one end of the connecting shaft; the relay is electrically connected to the total input power supply end of the low-voltage withdrawable switch cabinet; the power output end of the relay is electrically connected to one end of the power input of the wireless transmission circuit module; the power output end of the password control switch is electrically connected to the power input ends of the electromagnetic door lock and the electric push rod respectively.

2. The locking mechanism of a low-voltage withdrawable switch cabinet according to claim 1, characterized in that: There are limit plates on both sides of the connecting shaft.

3. The locking mechanism of a low-voltage withdrawable switch cabinet according to claim 1, characterized in that: The lock core of the electromagnetic door lock and the hollow part of the fixing seat are in the same plane.

4. The locking mechanism of a low-voltage withdrawable switch cabinet according to claim 1, characterized in that: The password control switch is equipped with three electrically connected power switches. One end of the first power switch is connected to the positive power input end of the password control switch, and the positive power output end of the password control switch is connected to the positive power input ends of the second power switch and the third power switch.

5. The locking mechanism of a low-voltage withdrawable switch cabinet according to claim 1, characterized in that: The receiving circuit comprises a wireless receiving circuit module and a buzzer which are in the housing and electrically connected. The power input end of the buzzer is connected to the power output end of the wireless receiving circuit module.

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