Ring main unit locking device

Abstract

The utility model relates to the technical field of ring main units, and discloses a ring main unit locking device, comprising a cabinet body, one side of which is provided with a cabin door; the locking mechanism comprises a storage cavity formed in the side edge of the bin door, a fixing frame is fixed in the storage cavity, an electromagnet is arranged on the side, close to the fixing frame, of one end in the storage cavity, and two springs are arranged in the fixing frame; according to the utility model, the locking mechanism is arranged at the bin door, so that the bin door can be locked and closed in a power-on state to prevent door opening operation without power failure, when a circuit is powered off, the electromagnet is powered off and demagnetized, and under the rebound of the spring, the fixed column can pull the jacking column to reset, so that the jacking column at the lower part drives the plug to exit from the positioning hole; therefore, the bin door can be unlocked in time during power failure so as to be quickly opened for maintenance, the linkage of the bin door opening and closing is strong during power on and power off, and the use effect of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ring main units, in particular to a locking device for a ring main unit. Background Technique

[0002] A ring main unit is a set of power transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into a prefabricated sectionalized ring main unit power supply unit. Its core part adopts a load switch and a fuse, and has the advantages of simple structure, small volume, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution substations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, and factories and enterprises.

[0003] At present, when the ring main unit is under maintenance, in order to ensure operation safety, a locking device is usually set at the compartment door. However, during the use of the existing locking device for the ring main unit, the linkage of the compartment door switch during power on and off is poor. When powered on, the compartment door cannot be effectively locked, and when powered off, the compartment door is difficult to unlock in time, thus greatly affecting the use effect of the device. Content of the Utility Model

[0004] The utility model provides a locking device for a ring main unit to solve the problem of poor linkage of the compartment door switch during power on and off of the existing locking device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solution: A locking device for a ring main unit, comprising:

[0006] A cabinet body, with a compartment door arranged on one side of the cabinet body;

[0007] A locking mechanism, the locking mechanism includes a receiving cavity opened on the side of the compartment door, a fixed frame is fixed inside the receiving cavity, and an electromagnet is arranged on one end inside the receiving cavity close to the fixed frame. Two springs are arranged inside the fixed frame, and one end of each of the two springs is connected to a slidable fixed column. One end of each of the two fixed columns is connected to a top column, and a transmission component is arranged between the two fixed columns. One end of one of the top columns is fixed with a magnetic block that cooperates with the electromagnet, and one end of the other top column is fixed with a plug. A positioning hole corresponding to the plug is opened on one side of the cabinet body.

[0008] Preferably, the transmission component includes a connecting shaft rotatably connected to the middle inside the fixed frame through a bearing, a gear is fixed to the middle end of the connecting shaft, and tooth plates meshing with the gear are connected to the side walls of the two fixed columns.

[0009] Preferably, the plug has a semi-circular structure.

[0010] Preferably, a limiting block is fixed in the middle of one side of the two fixing columns relative to the toothed plate, and limiting grooves matching the limiting blocks are formed on both sides inside the fixing frame.

[0011] Preferably, the limiting block is T-shaped.

[0012] Preferably, openings facing the fixing columns are provided at both ends of the fixing frame, and the top column can pass through the openings.

[0013] Compared with the prior art, the present utility model has the following advantages: By arranging a locking mechanism at the warehouse door, the locking mechanism is composed of structures such as a fixing frame, fixing columns, top columns, plugs, magnetic blocks, and transmission components. When the circuit is powered on, the electromagnet adsorbs the magnetic block, and the two fixing columns move away from each other, so that the top column drives the plug to insert into the positioning hole on the side of the cabinet body, thereby realizing the locking and closing of the warehouse door in the powered-on state to prevent door opening operations without power-off. And when the circuit is powered off, the electromagnet is powered off and demagnetized, and under the rebound of the spring, the fixing column can pull the top column to reset, so that the lower top column drives the plug to withdraw from the positioning hole, thereby unlocking the warehouse door in time when powered off for quick door opening and maintenance. The linkage of the warehouse door switch during power-on and power-off is strong, greatly improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the internal structure of the storage cavity of the present utility model;

[0017] Figure 3 is a three-dimensional structure diagram of the fixing frame of the present utility model;

[0018] Figure 4 is a schematic diagram of the internal structure of the fixing frame of the present utility model;

[0019] In the figure: 1, cabinet body; 2, warehouse door; 3, storage cavity; 4, electromagnet; 5, fixing frame; 6, connecting shaft; 7, gear; 8, fixing column; 9, toothed plate; 10, spring; 11, limiting block; 12, limiting groove; 13, top column; 14, magnetic block; 15, plug; 16, positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] The present utility model provides a Figures 1 - 4 ring main unit locking device as shown, including:

[0022] A cabinet body 1, with a compartment door 2 provided on one side of the cabinet body 1;

[0023] A locking mechanism, the locking mechanism includes a receiving cavity 3 opened on the side of the compartment door 2, a fixed frame 5 is fixed inside the receiving cavity 3, and an electromagnet 4 is provided on one side near the fixed frame 5 at one end inside the receiving cavity 3. Two springs 10 are provided inside the fixed frame 5, and one end of each of the two springs 10 is connected to a slidable fixed column 8. One end of each of the two fixed columns 8 is connected to a top column 13, and a transmission component is provided between the two fixed columns 8. One end of one of the top columns 13 is fixed with a magnetic block 14 that cooperates with the electromagnet 4, and one end of the other top column 13 is fixed with a plug 15. A positioning hole 16 corresponding to the plug 15 is opened on one side of the cabinet body 1; the plug 15 has a semi-circular structure.

[0024] Both ends of the fixed frame 5 are provided with openings facing the fixed column 8, and the top column 13 can pass through the openings.

[0025] The transmission component includes a connecting shaft 6 rotatably connected to the middle inside the fixed frame 5 through a bearing. A gear 7 is fixed to the middle end of the connecting shaft 6. Tooth plates 9 meshing with the gear 7 are connected to the side walls of the two fixed columns 8.

[0026] When the present utility model is in use, when the circuit is powered on, the electromagnet 4 is also in the powered-on state, thereby generating a strong magnetic force to adsorb the magnetic block 14 beside it. When the magnetic block 14 is adsorbed on the electromagnet 4, the magnetic block 14 drives the fixed column 8 to move inside the fixed frame 5 through the top column 13, so that the fixed column 8 stretches the spring 10 at its tail end. At the same time, since the upper fixed column 8 drives the gear 7 to mesh and rotate through the tooth plate 9, the gear 7 drives the other tooth plate 9 to mesh and move, so that the tooth plate 9 drives the lower fixed column 8 to move. After that, the lower fixed column 8 stretches the spring 10 at its tail end and drives the plug 15 to extend out of the receiving cavity 3 through the top column 13, and then the top column 13 drives the plug 15 to insert into the positioning hole 16 on the side of the cabinet body 1, thereby realizing the locking and closing of the compartment door 2 in the powered-on state to prevent door opening operations without power-off;

[0027] And when the circuit is powered off, the electromagnet 4 is powered off and demagnetized at this time, and the adsorption force between the electromagnet and the magnetic block is reduced. Under the elastic rebound of the spring 10, the fixed columns 8 on both sides can simultaneously pull the ejector pin 13 to reset, so that the lower ejector pin 13 drives the plug 15 to withdraw from the positioning hole 16, so that the door 2 of the bin can be unlocked in time when the power is off, so as to quickly open the door for maintenance. The linkage of the opening and closing of the door 2 of the bin during power on and off is strong, which greatly improves the use effect of the device.

[0028] A limiting block 11 is fixed in the middle of one side of the two fixed columns 8 relative to the toothed plate 9, and limiting grooves 12 matching the limiting block 11 are formed on both sides inside the fixed frame 5; the limiting block 11 is in a T shape.

[0029] By arranging the limiting block 11 and the limiting groove 12, the fixed column 8 can drive the limiting block 11 to slide in the limiting groove 12. Under the action of this structure, the fixed column 8 can be limited and supported, thus greatly ensuring the stability of the fixed column 8 during movement.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A ring main unit locking device, characterized in that: include: A cabinet body (1), wherein a door (2) is provided on one side of the cabinet body (1); A locking mechanism, the locking mechanism comprising a storage chamber (3) opened on the side of a compartment door (2), a fixed frame (5) fixed inside the storage chamber (3), and an electromagnet (4) is arranged on one end of the storage chamber (3) near the fixed frame (5), a spring (10) is arranged inside the fixed frame (5), and one end of two springs (10) are connected to a slidable fixed column (8), one end of two fixed columns (8) are connected to a top column (13), and a transmission component is arranged between the two fixed columns (8), one end of one top column (13) is fixed with a magnetic block (14) matching with the electromagnet (4), and one end of the other top column (13) is fixed with a plug (15), and one side of the cabinet (1) is provided with a positioning hole (16) corresponding to the plug (15).

2. A ring main unit locking device according to claim 1, characterized in that: The transmission assembly comprises a connecting shaft (6) rotatably connected to the middle of the fixed frame (5) via a bearing, a gear (7) being fixed to the middle end of the connecting shaft (6), and side walls of the two fixed columns (8) being connected to toothed plates (9) meshing with the gear (7).

3. A ring main unit locking device according to claim 2, characterized in that: The plug (15) is in a semicircular structure.

4. A ring main unit locking device according to claim 1, characterized in that: A limiting block (11) is fixed in the middle of one side of the two fixing columns (8) relative to the tooth plate (9), and limiting grooves (12) matching the limiting block (11) are provided on both sides of the interior of the fixing frame (5).

5. A ring main unit locking device according to claim 4, characterized in that: The limiting block (11) is T-shaped.

6. A ring main unit locking device according to claim 1, characterized in that: Both ends of the fixing frame (5) are provided with openings facing the fixing column (8), and the top column (13) can pass through the openings.

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