A new phase-to-ground short circuit protection device

Abstract

The utility model discloses a novel phase ground short circuit protection device belongs to electrical protection device technical field, and this device includes phase ground short circuit protector main part, plug -in mechanism and sealing mechanism, and plug -in mechanism is equipped with phase line socket and phase line plug, and the locking block in the plug can be automatically clamped into the locking groove of socket under the action of spring no.

Description

Technical Field

[0001] This utility model relates to the field of electrical protection device technology, and in particular to a novel phase-to-ground short-circuit protection device. Background Technology

[0002] Phase-to-ground short-circuit protection devices are indispensable safety equipment in power systems. They are used to quickly disconnect the circuit when a short-circuit fault is detected between the phase line and the ground to protect equipment and personnel. During installation and operation, the device needs to be reliably electrically connected to the phase line of the power grid.

[0003] In existing technical practices, this connection is usually achieved by bolting or screwing. Operators need to use screwdrivers and wrenches to fix the phase wire terminals to the terminals of the protection device. Although this method can ensure the tightness of the connection, it also reveals some shortcomings in practical applications. First, during installation or regular maintenance, each connection or disconnection requires tedious loosening and tightening operations with tools. Especially when the installation space is small or multiple wiring needs to be handled, this process is not only time-consuming and labor-intensive, but also greatly reduces on-site work efficiency.

[0004] Furthermore, when a phase wire is removed for maintenance, the exposed phase wire socket or wiring port on the protection device becomes unprotected. In the working environment of substations, distribution rooms, or outdoor cabinets, the air often contains a large amount of dust, impurities, and moisture. These pollutants can easily penetrate into the exposed port and adhere to the metal conductive parts. The accumulation of dust can lead to poor contact when rewiring, while the corrosion of moisture can cause oxidation and rust of metal parts, seriously affecting the electrical performance and service life of the device, and even creating a safety hazard of short circuit or contact overheating when power is restored.

[0005] Therefore, this utility model proposes a novel phase-to-ground short-circuit protection device to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems of cumbersome and time-consuming phase line connection operation, low efficiency, and lack of effective sealing protection of the connection port after disconnection in the existing phase-to-ground short-circuit protection device, this utility model aims to provide a new type of phase-to-ground short-circuit protection device with improved structure that can effectively solve the above problems.

[0007] This utility model provides a novel phase-to-ground short-circuit protection device, including a phase-to-ground short-circuit protector body; and a plug-in mechanism and a sealing mechanism disposed on the body. The plug-in mechanism includes a phase wire socket fixed on the body and a phase wire plug that is plugged into the phase wire socket; the sealing mechanism includes a rotating shaft and a rotating sealing cover.

[0008] The phase wire socket has a locking groove on its inner wall and an unlocking push rod and a top block that is linked to the unlocking push rod. The phase wire plug has a locking block that is slidably connected inside and has a spring for pushing the locking block. The rotating sealing cover has a sealing plug.

[0009] Furthermore, the locking block can elastically extend under the action of the spring to engage with the locking groove of the phase wire socket, the top block is configured to push the locking block to retract to disengage from the locking groove, and the rotating sealing cover is rotatably connected to the phase-to-ground short-circuit protector body via the rotating shaft to seal the phase wire socket with the sealing plug after the phase wire plug is pulled out.

[0010] Preferably, the connection between the unlocking push rod and the top block is a fixed connection.

[0011] Preferably, the insertion / removal mechanism further includes a return spring connected between the top block and the phase wire socket.

[0012] Preferably, the locking block, the unlocking press rod, and the top block are each provided in pairs and are symmetrically distributed. The pair of top blocks move towards each other under the drive of the pair of unlocking press rods, so as to push the corresponding locking blocks to retract towards each other.

[0013] Preferably, the inner side of the top block abuts against the outer side of the locking block.

[0014] Preferably, one end of the spring abuts against the inner wall of the phase wire plug, and the other end abuts against the locking block.

[0015] Preferably, the sealing mechanism further includes a sealing gasket, which is disposed on the contact surface between the rotating sealing cover and the phase-to-ground short-circuit protector body.

[0016] Preferably, the sealing plug is made of an elastic material: This utility model has the following beneficial effects: Through the above technical solution: 1. This utility model, by setting up an insertion and removal mechanism composed of a phase wire plug, a phase wire socket, a locking block, a spring, and an unlocking pressing rod, realizes automatic locking when the phase wire is inserted and easy removal when pressed to unlock. It solves the problem that the existing technology mostly uses bolt fastening for phase wire connection, which leads to cumbersome, time-consuming, and inefficient installation and maintenance process. It achieves the technical effect of simplifying operation, realizing quick insertion and removal and reliable locking, shortening the installation and maintenance time of phase wire, and improving work efficiency.

[0017] 2. This utility model, by setting a rotating sealing cover that is rotatably connected to the main body of the protector, and integrating a sealing plug and a sealing gasket on the cover, allows for easy sealing of the phase wire socket after the phase wire plug is unplugged. This solves the problem in the prior art where the phase wire socket port is exposed when not in operation, making it susceptible to dust and moisture intrusion, which can lead to contamination and damage to internal components. It achieves the technical effect of effective sealing and protection, maintaining the cleanliness and dryness of the socket interior, avoiding short circuit faults caused by contamination, and ensuring the electrical connection stability and safety when the device is reused. Attached Figure Description

[0018] Figure 1 This is a perspective view of a novel phase-to-ground short-circuit protection device proposed in this utility model; Figure 2 This is a structurally exploded view of the plugging and unplugging mechanism of a novel phase-to-ground short-circuit protection device proposed in this utility model; Figure 3 This is a split view of the locking block structure of a novel phase-to-ground short-circuit protection device proposed in this utility model; Figure 4 This is a cross-sectional view of the phase wire socket structure of a novel phase-to-ground short-circuit protection device proposed in this utility model.

[0019] Legend: 1. Phase-to-ground short-circuit protector; 2. Insertion / removal mechanism; 201. Phase wire socket; 202. Phase wire plug; 203. Locking block; 204. Spring 1; 205. Unlocking push rod; 206. Top block; 207. Return spring; 208. Locking groove; 3. Sealing mechanism; 301. Rotating sealing cover; 302. Rotating shaft; 303. Sealing plug; 304. Sealing gasket. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Example: Please refer to Figures 1 to 4 This utility model provides a novel phase-to-ground short-circuit protection device, which aims to solve the technical problems of cumbersome phase-line connection operation and lack of effective interface protection in existing phase-to-ground short-circuit protection devices.

[0022] like Figures 1 to 4As shown, this novel phase-to-ground short-circuit protection device includes a phase-to-ground short-circuit protector 1 body, and a plug-in mechanism 2 and a sealing mechanism 3 disposed on the phase-to-ground short-circuit protector 1 body. The plug-in mechanism 2 includes a phase wire socket 201 fixed on the phase-to-ground short-circuit protector 1 body and a phase wire plug 202 detachably plugged into the phase wire socket 201. The sealing mechanism 3 includes a rotating sealing cover 301 rotatably connected to the phase-to-ground short-circuit protector 1 body via a rotating shaft 302. A sealing plug 303 is provided on the rotating sealing cover 301. The sealing mechanism 3 is used to seal and protect the phase wire socket 201 after the phase wire plug 202 is pulled out.

[0023] To solve the above-mentioned technical problems, the technical solution of this embodiment lies in the structural fit and connection relationship inside the insertion and extraction mechanism 2. Please refer to the following for details. Figures 2 to 4 The structure will be described in detail below: A locking groove 208 is provided on the inner wall of the phase wire socket 201. The phase wire socket 201 is also provided with an unlocking press rod 205 and a top block 206 fixedly connected to the unlocking press rod 205. A return spring 207 is connected between the top block 206 and the phase wire socket 201. A locking block 203 is slidably connected inside the phase wire plug 202. A spring 204 is also provided inside the phase wire plug 202. One end of the spring 204 abuts against the inner wall of the phase wire plug 202, and the other end abuts against the locking block 203. In the assembled state, when the phase wire plug 202 is inserted into the phase wire socket 201, the locking block 207 is engaged with the spring 204. Under the action of the rebound force of 204, it can elastically extend and engage in the locking groove 208 to achieve locking; when unlocking is required, pressing the unlocking press rod 205 drives the top block 206 to move, and the inner side of the top block 206 abuts against the outer side of the locking block 203, thereby pushing the locking block 203 to retract and disengage from the locking groove 208; in a specific embodiment, the locking block 203, the unlocking press rod 205 and the top block 206 are each provided in a pair and symmetrically distributed. The pair of top blocks 206 move towards each other under the action of the corresponding pair of unlocking press rods 205 to push the corresponding locking blocks 203 to retract towards each other.

[0024] In a preferred embodiment, to ensure reliable force transmission between the unlocking push rod 205 and the top block 206, the unlocking push rod 205 and the top block 206 are fixedly connected; in a preferred embodiment, to enable the unlocking mechanism to automatically reset, the insertion / removal mechanism 2 also includes a reset spring 207, which is connected between the top block 206 and the phase wire socket 201; in a preferred embodiment, to provide reliable locking rebound force, one end of the spring 204 abuts against the inner wall of the phase wire plug 202, and the other end abuts against the locking block 203; in a preferred embodiment, to further enhance the sealing effect, the sealing mechanism 3 also includes a sealing gasket 304, which is disposed on the contact surface between the rotating sealing cover 301 and the main body of the phase-to-ground short-circuit protector 1; in a preferred embodiment, to ensure that the sealing plug 303 can fit tightly against the inner wall of the phase wire socket 201, the sealing plug 303 is made of an elastic material.

[0025] Working principle: When the phase wire needs to be installed, the plugging and unplugging mechanism 2 functions. First, the two phase wire plugs 202 connected to the phase wire are inserted into the inner walls of the phase wire sockets 201, which are fixedly connected to the upper and lower sides of the phase-to-ground short-circuit protector 1. During the insertion of the phase wire plugs 202, the two locking blocks 203, which are slidably connected on the left and right sides of their inner walls, are squeezed by the inner walls of the phase wire sockets 201, causing the inner walls of the phase wire plugs 202 to contract. At this time, the spring 204 is compressed. When the phase wire plugs 202 are inserted into place, the two locking blocks 203 are pushed out by the rebound force of the spring 204, and are pushed into the inner walls of the corresponding locking grooves 208, so that the two locking blocks 203 are engaged in the inner walls of the corresponding locking grooves 208, thereby completing the locking of the phase wire plugs 202. The outer sides of the two locking blocks 203 are tightly fitted with the inner sides of the corresponding top blocks 206. When it is necessary to unplug the phase wire... During maintenance, the unlocking levers 205 on both sides of the phase wire socket 201 need to be pressed. Since the unlocking levers 205 are fixedly connected to the top block 206, when the unlocking levers 205 are pressed and slide inward along the inner wall of the phase wire socket 201, they will drive the top block 206 to push the locking block 203 inward. When the top block 206 is in place, the locking block 203 disengages from the locking groove 208 and releases the lock. At the same time, the movement of the unlocking levers 205 will drive the top block 206 and its fixedly connected return spring 207 to move. At this time, the return spring 207 is stretched. After the phase wire plug 202 is pulled out, the unlocking levers 205 can be released. At this time, the unlocking levers 205 return to their initial position under the action of the return spring 207. The connection is secured by the locking block 203. Pressing the unlocking levers 205 makes it easy to pull out the plug, shortening the installation and maintenance time of the phase wire and improving work efficiency. Furthermore, when the phase plug 202 is pulled out for maintenance and the phase socket 201 needs to be sealed, the sealing mechanism 3 comes into play, rotating the rotating sealing cover 301 along the rotating shaft 302. When it is rotated into place, the sealing plug 303 is inserted into the inner wall of the corresponding phase socket 201. Due to the action of its material, the sealing plug 303 is embedded in the inner wall of the phase socket 201, completing the sealing of the phase socket 201 and fixing the rotating sealing cover 301. At the same time, the two pairs of sealing gaskets 304 will fit tightly together, further sealing the phase socket 201, effectively preventing dust and moisture from entering the phase socket 201, avoiding damage to internal components due to contamination and moisture, maintaining a clean and dry internal environment, preventing short circuit faults, and ensuring that the phase socket 201 can stably transmit power and signals when the phase plug 202 is inserted again.

Claims

1. A novel phase-to-ground short-circuit protection device, comprising a phase-to-ground short-circuit protector (1) as the main body, characterized in that, The device further includes: The insertion and removal mechanism (2) includes a phase wire socket (201) fixed on the main body and a phase wire plug (202) that is inserted into the phase wire socket (201). A locking groove (208) is provided on the inner wall of the phase wire socket (201). A locking block (203) is slidably connected in the phase wire plug (202). A spring (204) for pushing the locking block (203) is also provided in the phase wire plug (202). The locking block (203) can be elastically extended under the action of the spring (204) to engage in the locking groove (208). An unlocking press rod (205) is provided on the phase wire socket (201). The unlocking press rod (205) is linked to a top block (206). The top block (206) is configured to push the locking block (203) to retract and disengage from the locking groove (208). as well as The sealing mechanism (3) includes a rotating shaft (302) and a rotating sealing cover (301). The rotating sealing cover (301) is rotatably connected to the main body of the phase-to-ground short-circuit protector (1) via the rotating shaft (302). The rotating sealing cover (301) is provided with a sealing plug (303) for inserting into the phase-to-phase socket (201) after the phase-to-phase plug (202) is pulled out.

2. The novel phase-to-ground short-circuit protection device according to claim 1, characterized in that, The unlocking push rod (205) and the top block (206) are fixedly connected.

3. A novel phase-to-ground short-circuit protection device according to claim 2, characterized in that, The insertion and removal mechanism (2) further includes a return spring (207) connected between the top block (206) and the phase wire socket (201).

4. A novel phase-to-ground short-circuit protection device according to claim 1, characterized in that, The locking block (203), unlocking press rod (205) and top block (206) are each provided in pairs and are symmetrically distributed; the top blocks (206) move towards each other under the drive of the unlocking press rod (205) so as to push the corresponding locking blocks (203) to retract towards each other.

5. A novel phase-to-ground short-circuit protection device according to claim 4, characterized in that, The inner side of the top block (206) abuts against the outer side of the locking block (203).

6. A novel phase-to-ground short-circuit protection device according to claim 1, characterized in that, One end of the spring (204) abuts against the inner wall of the phase plug (202), and the other end abuts against the locking block (203).

7. A novel phase-to-ground short-circuit protection device according to claim 1, characterized in that, The sealing mechanism (3) further includes a sealing gasket (304) disposed on the contact surface between the rotating sealing cover (301) and the main body of the phase-to-ground short-circuit protector (1).

8. A novel phase-to-ground short-circuit protection device according to claim 1 or 7, characterized in that, The sealing plug (303) is made of an elastic material.

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