Single-pole fuse type disconnecting switch

Abstract

The utility model provides a single-pole fuse type disconnecting switch, which comprises a base and an upper cover hinged with the base, both sides of the front part of the base are provided with slots, both sides of the front part of the upper cover are provided with insertion blocks, the base is internally provided with an installation cavity, the front part of the installation cavity is embedded with an arc extinguishing cover frame, and the front part of the arc extinguishing cover frame is provided with an opening. A lock plate is arranged at the top of the arc extinguishing cover frame, a lock groove is formed in the front portion of the upper cover, a lock plate groove is formed in the surface of the bottom wall of the lock groove, the lock plate is inserted into the lock plate groove, and a padlock hole is formed in the surface of the lock plate. According to the utility model, the lock plate and the lock plate groove are arranged, the lock plate is inserted into the lock plate groove, and the padlock type isolation lock is locked in the padlock hole on the lock plate, so that the fuse type isolation switch can be locked, and safety accidents caused by misoperation are effectively prevented. And unauthorized personnel can be prevented from operating the isolating switch, so that the safety of a working area is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fuse disconnect switches, and particularly relates to a single-pole fuse disconnect switch. Background Art

[0002] A fuse disconnect switch is a current protection device. Its working principle is that after the current exceeds the specified value for a period of time, the fuse melts due to the heat generated by itself, thereby disconnecting the circuit. This switch needs to meet three conditions: First, it protects the switch itself through a fuse; second, under normal circuit conditions, including specified overload conditions, it can connect, carry, and break the current, and at the same time, under specified abnormal circuit conditions, such as short circuit, it can carry the current within a specified time; finally, it can provide safe isolation for the circuit to ensure that the circuit is opened in the off position to ensure safe operation. Fuse disconnect switches are mainly used in power systems for circuit protection and safety isolation.

[0003] When a single-pole fuse disconnect switch malfunctions in a machine, it can separately disconnect the machine circuit. When replacing the fuse, it is not necessary to pull down the main switch. Just pulling the upper cover can drive the fuse to trip and cut off the power, and then the fuse can be replaced. However, the existing single-pole fuse disconnect switches usually do not have a locking structure, resulting in easy unauthorized operation of the disconnect switch, which will not only seriously affect the normal operation of the machine and reduce production efficiency, but also easily lead to safety accidents due to misoperation. Summary of the Utility Model

[0004] The utility model aims to provide a single-pole fuse disconnect switch to solve the problems raised in the above background art.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A single-pole fuse disconnect switch includes a base and an upper cover hinged to the base. Slots are provided on both sides of the front part of the base, and plug blocks are provided on both sides of the front part of the upper cover. An installation cavity is provided inside the base, an arc extinguishing cover frame is embedded in the front part of the installation cavity, a lock plate is provided on the top of the arc extinguishing cover frame, a lock groove is provided on the front part of the upper cover, a lock plate groove is provided on the bottom wall surface of the lock groove, the lock plate is inserted into the lock plate groove, and a padlock hole is provided on the surface of the lock plate.

[0007] Preferably, the two plug blocks can be respectively inserted into the two slots.

[0008] Preferably, buckles are provided on both sides of the arc extinguishing cover frame, clamping grooves are provided on both side walls of the front part of the installation cavity, and the two buckles are respectively clamped into the two clamping grooves.

[0009] Preferably, a padlock isolation lock can be locked into the padlock hole.

[0010] Advantageous effects

[0011] One or more of the above technical solutions in a single-pole fuse-disconnect switch provided by an embodiment of the present utility model have at least one of the following technical effects:

[0012] Through the above technical solutions, the present utility model is provided with a lock plate and a lock plate groove, and the lock plate is inserted into the lock plate groove. By locking a padlock-type isolation lock into the padlock hole on the lock plate, the fuse-disconnect switch can be locked, effectively preventing safety accidents caused by misoperation. And it can prevent unauthorized personnel from operating the disconnect switch, ensuring the safety of the working area. And by providing a plug and a slot, and inserting the plug into the slot, a limiting structure is formed between the upper cover and the base after the fuse-disconnect switch is closed, avoiding shaking between the upper cover and the base and improving stability. Description of the drawings

[0013] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0014] Figure 2 is a schematic structure diagram of the upper cover of the present utility model;

[0015] Figure 3 is a schematic structure diagram of the base of the present utility model;

[0016] Figure 4 is a schematic structure diagram of the arc extinguishing cover frame of the present utility model.

[0017] The corresponding relationship between the reference numerals and the component names in the drawings is as follows:

[0018] 1. Base; 2. Upper cover; 3. Slot; 4. Plug; 5. Installation cavity; 6. Arc extinguishing cover frame; 7. Lock plate; 8. Lock groove; 9. Lock plate groove; 10. Padlock hole; 11. Buckle; 12. Card slot. Specific embodiments

[0019] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. 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.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figures 1-4 shown, it is a schematic structural diagram of a single-pole fuse-type disconnect switch according to a preferred embodiment of the present utility model;

[0023] In this embodiment, it includes a base 1 and an upper cover 2 hinged to the base 1. The upper cover 2 can be rotated and opened. Slots 3 are provided on both sides of the front part of the base 1, and plug blocks 4 are provided on both sides of the front part of the upper cover 2. An installation cavity 5 is provided inside the base 1, and an arc extinguishing cover frame 6 is embedded in the front part of the installation cavity 5. The inside of the arc extinguishing cover frame 6 is used to install an arc extinguishing cover. A lock plate 7 is integrally provided at the top of the arc extinguishing cover frame 6. A lock groove 8 is provided at the front part of the upper cover 2. The lock groove 8 is used to accommodate a padlock-type isolation lock. A lock plate groove 9 is provided on the bottom wall surface of the lock groove 8. The lock plate 7 is inserted into the lock plate groove 9. A padlock hole 10 is provided on the surface of the lock plate 7. By locking a padlock-type isolation lock into the padlock hole 10 on the lock plate 7, the fuse-type disconnect switch can be locked, effectively preventing safety accidents caused by misoperation. And it can prevent unauthorized personnel from operating the disconnect switch, ensuring the safety of the working area.

[0024] In this embodiment, the two plug blocks 4 can be respectively inserted into the two slots 3, so that after the fuse-type disconnect switch is closed, a limiting structure is formed between the upper cover 2 and the base 1, avoiding shaking between the upper cover 2 and the base 1 and improving stability.

[0025] In this embodiment, buckles 11 are provided on both sides of the arc extinguishing cover frame 6, and clamping grooves 12 are provided on both side walls of the front part of the installation cavity 5. The two buckles 11 are respectively clamped into the two clamping grooves 12, and the fixed connection between the arc extinguishing cover frame 6 and the base 1 is realized through this structure.

[0026] In this embodiment, a padlock-type isolating lock can be locked into the padlock hole 10. By locking a padlock-type isolating lock into the padlock hole 10 on the lock plate 7, the fuse disconnecting switch can be locked, effectively preventing safety accidents caused by misoperation.

[0027] For a single-pole fuse disconnecting switch of the present utility model, its installation method, connection method or setting method are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.

[0028] The technologies not described in detail in the present utility model are all well-known technologies. Those skilled in the art can easily implement the present utility model based on understanding this specification, and the content shown in the drawings is a part of this specification.

[0029] The above content further elaborates on the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. A single-pole fuse-disconnector switch, comprising a base (1) and an upper cover (2) hinged to the base (1), characterized in that: On both sides of the front part of the base (1), there are slots (3). On both sides of the front part of the upper cover (2), there are insertion blocks (4). An installation cavity (5) is provided inside the base (1). An arc extinguishing cover frame (6) is embedded in the front part of the installation cavity (5). A locking plate (7) is provided on the top of the arc extinguishing cover frame (6). A locking groove (8) is provided on the front part of the upper cover (2). A locking plate groove (9) is provided on the bottom wall surface of the locking groove (8). The locking plate (7) is inserted into the locking plate groove (9). A padlock hole (10) is provided on the surface of the locking plate (7).

2. The single-pole fuse-disconnector switch according to claim 1, wherein: The two insertion blocks (4) can be respectively inserted into the two slots (3).

3. The single-pole fuse-disconnecting switch according to claim 1, characterized in that: On both sides of the arc extinguishing cover frame (6), there are buckles (11). On both side walls of the front part of the installation cavity (5), there are clamping grooves (12). The two buckles (11) are respectively clamped into the two clamping grooves (12).

4. A single-pole fuse-disconnector switch according to claim 1, characterized in that: A padlock type isolating lock can be locked into the padlock hole (10).

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