Mechanical interlock for dual power cabinet

Abstract

The utility model relates to power equipment technical field, concretely relates to a mechanical interlock device for double power cabinet, including power cabinet body, the both sides of power cabinet body's outside are all provided with the heat dissipation window, the front side rotationally connected with the cabinet door of power cabinet body, the front side fixedly connected with the transparent plate of cabinet door, the front side fixedly connected with the handle of cabinet door, the inside of cabinet door is provided with two anti -electric shock mechanism, the inside of power cabinet body is provided with two power device, the front side fixedly connected with interlock mechanism of two power device, the front side fixedly connected with the display screen of power device, in the utility model, through gear rack and connecting rod assembly cooperation, servo motor drive realizes circuit breaker reverse linkage, lock plate and U -shaped switch accurate limit operation sequence, transmission steady, response is quick, prevents mistaken switching, electromagnet and mechanical lock pin combination forms double protection, promotes anti -electric shock and timeliness and reliability, does not influence the operating convenience.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a mechanical interlocking device for a dual power supply cabinet. Background Technology

[0002] Mechanical interlocking devices are safety devices that forcibly restrict the operating sequence of equipment through mechanical structures. They utilize components such as gears, linkages, and locks to ensure that one action can only be performed after another has been completed, such as the interlocking of circuit breakers and disconnect switches. This prevents misoperation and is widely used in power, machine tool, and other fields to ensure the safety of equipment and personnel.

[0003] A search revealed a Chinese announcement (CN203690155U) disclosing a dual-power mechanical interlocking operating device for a ring main unit. The device includes a switch operating mechanism and a mechanical interlocking mechanism. The mechanical interlocking mechanism is installed at the front of the switch operating mechanism and comprises a left interlocking crank arm, a left interlocking connecting rod, a middle interlocking crank arm, a right interlocking connecting rod, and a right interlocking crank arm. The middle interlocking crank arm is located between the left and right interlocking crank arms. A main rotating shaft drives the middle interlocking crank arm to rotate. The upper part of the middle interlocking crank arm drives the left interlocking crank arm to rotate via the left interlocking connecting rod, and the lower part of the middle interlocking crank arm drives the right interlocking crank arm to rotate via the right interlocking connecting rod. This allows for simultaneous operation of the closing and opening of two load switches by a single mechanism, ensuring that both load switches are properly closed and opened, and exhibits good mechanical characteristics.

[0004] The aforementioned patent specification mentions that "the upper part of the interlocking intermediate crank arm drives the left interlocking crank arm to rotate via the left interlocking connecting rod, and the lower part of the interlocking intermediate crank arm drives the right interlocking crank arm to rotate via the right interlocking connecting rod." Its mechanical interlocking device mainly relies on crank arms and connecting rods for transmission, resulting in numerous parts, complex transmission links, and susceptibility to external interference. To address the above-mentioned problems, a mechanical interlocking device for dual-power supply cabinets is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a mechanical interlocking device for dual power supply cabinets, which solves the problem that some existing mechanical interlocking devices for dual power supply cabinets have poor transmission stability and are easily affected by external forces.

[0006] To achieve the above objectives, this utility model provides a mechanical interlocking device for a dual power supply cabinet, including a power supply cabinet body. Ventilation windows are provided on both outer sides of the power supply cabinet body. A cabinet door is rotatably connected to the front of the power supply cabinet body. A transparent panel is fixedly connected to the front of the cabinet door. A handle is fixedly connected to the front of the cabinet door. Two anti-electric shock mechanisms are provided inside the cabinet door. Two power supply devices are provided inside the power supply cabinet body. An interlocking mechanism is fixedly connected to the front of the two power supply devices. A display screen is fixedly connected to the front of the power supply devices. The interlocking mechanism includes two circuit breakers, three U-shaped switches are provided on the front side of the circuit breakers, a linkage assembly is provided on the outside of the circuit breakers, and a linkage assembly is fixedly connected to the right side of the power cabinet.

[0007] The linkage assembly includes a fixed column, the right side of which is fixedly connected to the right side of the circuit breaker. A rotating plate is rotatably connected to the outside of the fixed column. A locking plate is fixedly connected to the front side of the rotating plate. The locking plate is disposed on the outside of the three U-shaped switches. A connecting column is rotatably connected to the right side of the locking plate. A connecting plate is fixedly connected to the right side of the connecting column.

[0008] The linkage component includes a device housing, with the left side of the device housing fixedly connected to the left side of the power supply cabinet, and a servo motor fixedly connected to the right side of the device housing. A rotating shaft is fixedly connected to the drive end of the servo motor, and the outside of the rotating shaft is rotatably connected to the inside of the device housing. A gear is fixedly connected to the outside of the rotating shaft.

[0009] The device housing has two fixedly connected limit blocks inside, and each of the two limit blocks has an L-shaped plate slidably connected inside. The first end of each L-shaped plate is fixedly connected to a rack, and the two racks mesh with the gear.

[0010] The end of the L-shaped plate is fixedly connected to the outside of the connecting plate, and the outside of the connecting plate is slidably connected to the outside of the power supply cabinet.

[0011] The anti-electric shock mechanism includes a self-locking component, which is disposed inside the cabinet door, and an alarm light is fixedly connected to the front side of the cabinet door.

[0012] The self-locking assembly includes two return springs, with the outer surfaces of the two return springs disposed inside the cabinet door. The ends of the return springs are fixedly connected to a fixing pin, and the outer surfaces of the fixing pins are slidably connected inside the cabinet door.

[0013] Two electromagnets are fixedly connected to the front side of the power cabinet, and the two fixing pins are slidably connected to the inside of the front side of the power cabinet. The ends of the fixing pins are in contact with the outside of the electromagnets.

[0014] 1. In this utility model, a linkage component driven by a gear and rack is used in conjunction with a linkage component, and a servo motor is used to drive the reverse linkage control of two circuit breakers. By utilizing the nested structure of the locking plate and the U-shaped switch, the switching operation sequence is precisely restricted. Compared with the traditional interlocking method, the transmission is more stable and the interlocking response is faster, which can effectively prevent the accidental switching of dual power supplies.

[0015] 2. In this utility model, an electromagnet is combined with a mechanical locking pin. When the cabinet door is closed, the electromagnet attracts the locking pin to achieve self-locking. In abnormal conditions, the spring drives the locking pin to reset and triggers an alarm, forming a dual protection of "electrical + mechanical". Compared with a single mechanical lock, it improves the timeliness and reliability of electric shock protection without affecting the convenience of normal operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a three-dimensional schematic diagram of a mechanical interlocking device for a dual power supply cabinet according to the present invention.

[0018] Figure 2 This is a schematic diagram of the fixing pin of a mechanical interlocking device for a dual power supply cabinet according to the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of a U-shaped switch for a mechanical interlocking device used in a dual power supply cabinet according to this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of an L-shaped plate for a mechanical interlocking device used in a dual power supply cabinet according to this utility model.

[0021] In the diagram: 1. Power cabinet; 2. Ventilation window; 3. Cabinet door; 4. Transparent panel; 5. Handle; 6. Anti-electric shock mechanism; 61. Self-locking assembly; 611. Return spring; 612. Fixing pin; 613. Electromagnet; 62. Alarm light; 7. Power supply unit; 8. Interlocking mechanism; 81. Circuit breaker; 82. U-shaped switch; 83. Linkage assembly; 831. Fixing column; 832. Rotating plate; 833. Locking plate; 834. Connecting column; 835. Connecting plate; 84. Linkage assembly; 841. Device housing; 842. Servo motor; 843. Rotating shaft; 844. Gear; 845. Limit block; 846. L-shaped plate; 847. Rack; 9. Display screen. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Please see Figure 1 , Figure 3 , Figure 4This utility model provides a technical solution: a mechanical interlocking device for a dual power supply cabinet, including a power supply cabinet body 1, which serves as the overall installation base. Both external sides are provided with ventilation windows 2, which are grid-shaped and used for internal heat dissipation. A cabinet door 3 is rotatably connected to the front of the power supply cabinet body 1, and the door 3 can rotate around the power supply cabinet body 1 to open and close. A transparent plate 4 is fixedly connected to the front of the door 3 for easy observation of the internal status. A handle 5 is fixedly connected to the front of the door 3 for easy gripping and opening / closing. Two anti-electric shock mechanisms 6 are symmetrically distributed inside the door 3. To prevent electric shock when the cabinet door 3 is opened, the power cabinet 1 has two power supply units 7 inside. Each power supply unit 7 is a core component for dual power supply, enabling switching between primary and secondary power sources. An interlocking mechanism 8 is fixedly connected to the front of each of the two power supply units 7. The interlocking mechanism 8 restricts the operating sequence of the two power supply units 7 to prevent misoperation. A display screen 9 is fixedly connected to the front of each power supply unit 7, displaying real-time operating parameters for easy monitoring. The interlocking mechanism 8 includes two circuit breakers 81, which are key components for controlling the on / off state of the power supply units 7. A circuit breaker 81 is located on the front of each power supply unit 7. Three U-shaped switches 82, each with a U-shaped groove structure, are used to switch the circuit breaker 81 on and off. A linkage assembly 83 is externally mounted on the circuit breaker 81. This assembly transmits power to achieve interlocking. A linkage component 84 is fixedly connected to the right side of the power cabinet 1. This component provides the driving force for the interlocking action, causing the linkage assembly 83 to move. The linkage assembly 83 includes a fixed post 831, which is cylindrical and provides support. It is fixedly connected to the right side of the circuit breaker 81. The external surface of the fixed post 831 is rotatably connected to... There is a rotating plate 832, which can rotate around the fixed column 831 to realize power transmission. A locking plate 833 is fixedly connected to the front side. The locking plate 833 is adapted to the U-shaped switch 82 and can be embedded in the U-shaped switch 82 to restrict its action. It is externally set on the inner side of the three U-shaped switches 82. A connecting column 834 is rotatably connected to the right side of the locking plate 833. The connecting column 834 is cylindrical and is used to connect the locking plate 833 and the connecting plate 835. It can rotate flexibly with the movement of the components. A connecting plate 835 is fixedly connected to the right side. The connecting plate 835 is long and strip-shaped and can drive the connecting column 834 to move up and down. The linkage component 84 includes a housing 841, which provides protection and installation space for internal components. The left side is fixedly connected to the left side of the power cabinet 1. A servo motor 842 is fixedly connected to the right side of the housing 841. The servo motor 842 is the power source for the linkage component 84, providing stable rotational power. A rotating shaft 843 is fixedly connected to the drive end. The rotating shaft 843 is cylindrical and transmits power from the servo motor 842 to a gear 844. The gear 844 is externally rotatably connected to the inside of the housing 841. The gear 844 is fixedly connected to the outside of the rotating shaft 843 and rotates with the rotating shaft 843, meshing with a rack 847. To achieve power conversion, two limiting blocks 845 are fixedly connected inside the outer casing 841 of the device. The limiting blocks 845 have a block-shaped structure and guide and limit the sliding of the L-shaped plate 846. The L-shaped plate 846 is slidably connected inside both limiting blocks 845. The L-shaped plate 846 can slide horizontally within the limiting blocks 845. A rack 847 is fixedly connected to the front end. The rack 847 is matched with the teeth of the gear 844 and can move up and down under the drive of the gear 844. The two racks 847 and the gear 844 mesh with each other. The end of the L-shaped plate 846 is fixedly connected to the outside of the connecting plate 835. The outside of the connecting plate 835 is slidably connected to the outside of the power cabinet 1.

[0024] like Figure 1 , Figure 2 As shown, the anti-electric shock mechanism 6 includes a self-locking component 61, which can automatically lock and unlock the cabinet door 3. It is installed inside the cabinet door 3. An alarm light 62 is fixedly connected to the front side of the cabinet door 3. The alarm light 62 can emit an audible and visual alarm when the cabinet door 3 is abnormally opened, serving as a warning. The self-locking component 61 includes two return springs 611. The return springs 611 are compression springs that can provide return force. The two return springs 611 are located inside the cabinet door 3. The ends of the return springs 611 are fixedly connected to a fixing pin 612. The fixing pin 612 is cylindrical and can be inserted into the cabinet to lock the cabinet door 3. It is externally slidably connected inside the cabinet door 3. Two electromagnets 613 are fixedly connected to the front side of the power cabinet 1. When the electromagnets 613 are energized, they can generate magnetic force to attract the fixing pins 612. The two fixing pins 612 are externally slidably connected inside the front side of the power cabinet 1. The ends of the fixing pins 612 are in contact with the outside of the electromagnets 613.

[0025] Working principle: When switching operation is required for the power supply device 7 of the dual power supply cabinet, the interlocking mechanism 8 is activated. The servo motor 842 drives the rotating shaft 843 to rotate, which in turn drives the gear 844 to rotate. Since both racks 847 mesh with the gear 844, the rotation of the gear 844 causes the two L-shaped plates 846 to slide in opposite directions under the restriction of the limit block 845. The sliding of the L-shaped plates 846 drives the connecting plate 835 to move. The connecting plate 835 pulls the locking plate 833 through the connecting column 834, causing the rotating plate 832 to rotate around the fixed column 831. This achieves interlocking control of the U-shaped switch 82 on the circuit breaker 81, ensuring that the two power supply devices 7 will not be connected at the same time, and realizing reliable power switching interlocking. When the cabinet door 3 is closed, the electromagnet 613 in the anti-electric shock mechanism 6 is energized, which attracts the fixing pin 612, causing the fixing pin 612 to overcome the elastic force of the return spring 611 and slide into the front of the power cabinet 1, thus locking the cabinet door 3. When the cabinet door 3 is not closed properly or there is a risk of electric shock, the electromagnet 613 is de-energized, the return spring 611 pushes the fixing pin 612 to reset and disengage from the power cabinet 1, and at the same time the alarm light 62 is activated to provide anti-electric shock protection.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A mechanical interlocking device for a dual-power supply cabinet, comprising a power supply cabinet body, characterized in that: The power cabinet is provided with ventilation windows on both sides of the exterior. The front of the power cabinet is rotatably connected to a cabinet door. A transparent panel is fixedly connected to the front of the cabinet door. A handle is fixedly connected to the front of the cabinet door. Two anti-electric shock mechanisms are provided inside the cabinet door. Two power devices are provided inside the power cabinet. An interlocking mechanism is fixedly connected to the front of the two power devices. A display screen is fixedly connected to the front of the power devices. The interlocking mechanism includes two circuit breakers, three U-shaped switches are provided on the front side of the circuit breakers, a linkage assembly is provided on the outside of the circuit breakers, and a linkage assembly is fixedly connected to the right side of the power cabinet.

2. The mechanical interlocking device for a dual-power supply cabinet according to claim 1, characterized in that: The linkage assembly includes a fixed post, the right side of which is fixedly connected to the right side of the circuit breaker. A rotating plate is rotatably connected to the outside of the fixed post. A locking plate is fixedly connected to the front side of the rotating plate. The outside of the locking plate is disposed inside the three U-shaped switches. A connecting post is rotatably connected to the right side of the locking plate. A connecting plate is fixedly connected to the right side of the connecting post.

3. The mechanical interlocking device for a dual power supply cabinet according to claim 2, characterized in that: The linkage component includes a device housing. The left side of the device housing is fixedly connected to the left side of the power supply cabinet. A servo motor is fixedly connected to the right side of the device housing. A rotating shaft is fixedly connected to the drive end of the servo motor. The rotating shaft is rotatably connected to the inside of the device housing. A gear is fixedly connected to the outside of the rotating shaft.

4. A mechanical interlocking device for a dual-power supply cabinet according to claim 3, characterized in that: The device housing has two fixedly connected limit blocks inside, and each of the two limit blocks has an L-shaped plate slidably connected inside. The first end of each L-shaped plate is fixedly connected to a rack, and the two racks mesh with the gear.

5. A mechanical interlocking device for a dual-power supply cabinet according to claim 4, characterized in that: The end of the L-shaped plate is fixedly connected to the outside of the connecting plate, and the outside of the connecting plate is slidably connected to the outside of the power cabinet.

6. A mechanical interlocking device for a dual-power supply cabinet according to claim 1, characterized in that: The anti-electric shock mechanism includes a self-locking component, which is located inside the cabinet door, and an alarm light is fixedly connected to the front side of the cabinet door.

7. A mechanical interlocking device for a dual-power supply cabinet according to claim 6, characterized in that: The self-locking assembly includes two return springs, the outer surfaces of which are disposed inside the cabinet door. The ends of the return springs are fixedly connected to a fixing pin, and the outer surfaces of the fixing pins are slidably connected inside the cabinet door.

8. A mechanical interlocking device for a dual-power supply cabinet according to claim 7, characterized in that: Two electromagnets are fixedly connected to the front side of the power cabinet. The two fixing pins are slidably connected to the inside of the front side of the power cabinet, and the ends of the fixing pins are in contact with the outside of the electromagnets.

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