Power protection device

Abstract

The invention discloses an electric power protection device, and belongs to the technical field of electric power operation and maintenance. An electric power protection device comprises an insulating support, a lower support arm, a pipe sleeve and an upper support arm. The lower supporting arm and the upper supporting arm are fixedly installed at the two ends of the insulating support respectively, the lower portion of the pipe sleeve is rotationally connected with a connecting piece in a one-way mode, the connecting piece is rotationally connected with the lower supporting arm, a driving assembly is installed on the lower supporting arm and used for driving the pipe sleeve to rotate, a plurality of fuse wires are annularly arranged in the pipe sleeve, and the upper ends of the fuse wires are all connected with movable contact plates. The movable contact plate is clamped and matched with the upper support arm, and the fuse wire is electrically connected with the upper support arm through the movable contact plate. When the device is used, the upper wire is electrically connected with the lower wire through the upper support arm, the movable contact plate, the fuse wire and the lower support arm; when the fuse wire is fused, the pipe sleeve can rotate downwards under the action of gravity, so that the movable contact plate is disconnected from the upper support arm, and the safety of an electric power circuit is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power operation and maintenance, and more specifically, to an electric power protection device. Background Art

[0002] Power protection devices are installed on power lines so that when a short circuit or overload occurs in the power lines, the power supply can be quickly cut off to avoid the expansion of the fault and ensure the safety of the power system.

[0003] After searching, the patent document with the existing announcement number CN114038725B provides a drop-out fuse, which is formed by arranging an insulating support, a first arm, a second arm, a fuse tube and a plurality of fuses. When the circuit needs to be connected again, there is no need to remove the fuse tube from the power distribution system and then install the fuse. The dropped fuse tube is directly flipped upward until the card block of the next fuse abuts against the pressure block, thereby achieving the effect of quickly replacing the fuse and connecting the circuit.

[0004] Although the above device can avoid the need to replace the fuse, when the fuses at different positions on the device are connected to the circuit, the contact parts between the card block and the pressure block will be different, which will affect the reliability of power transmission on the one hand, and reduce the reliability of the connection between the card block and the pressure block on the other hand, both of which will have an adverse effect on power transmission. In view of this, we propose a power protection device. Summary of the invention

[0005] 1. Technical problems to be solved

[0006] The object of the present invention is to provide a power protection device to solve the problems raised in the above background technology.

[0007] 2. Technical solution

[0008] The present invention is achieved through the following technical solutions:

[0009] An electric power protection device comprises an insulating support, a lower support arm, a pipe sleeve and an upper support arm;

[0010] The lower support arm and the upper support arm are respectively fixedly mounted at both ends of the insulating support; the lower part of the sleeve is unidirectionally rotatably connected with a connecting piece, the connecting piece is rotatably connected to the lower support arm, a driving assembly is installed on the lower support arm, the driving assembly is used to drive the sleeve to rotate, a plurality of fuses are arranged in a ring shape in the sleeve, the upper ends of the fuses are connected with moving touch plates, the moving touch plates are snap-fitted with the upper support arm, and the fuse is electrically connected to the upper support arm through the moving touch plate.

[0011] As an optional solution of the technical solution of the present application document, a conductive slip ring is fixedly connected inside the pipe sleeve, the lower end of the fuse is fixed on the conductive slip ring, a conductive shaft is rotatably connected to the middle part of the conductive slip ring, the conductive slip ring is electrically connected to the conductive shaft, the conductive shaft is fixedly connected to the connecting piece, and the conductive shaft is electrically connected to the lower support arm.

[0012] As an optional solution to the technical solution of the present application document, the driving assembly includes a card block, a first elastic element, and a lever. The card block is slidably connected to the lower support arm. The card block is elastically connected to the lower support arm through the first elastic element. The number of the levers is the same as the number of fuses. Multiple levers are arranged in a ring and are fixedly connected to the pipe sleeve.

[0013] As an optional solution of the technical solution of this application document, a first pushing surface is provided on the side of the block away from the insulating support, and a second pushing surface is provided on one side of the lever, and the second pushing surface faces the rotation direction of the sleeve.

[0014] As an optional solution to the technical solution of the present application document, a ratchet is fixedly connected to the lower part of the sleeve, a pawl is snap-fitted on one side of the ratchet, the pawl is rotatably connected to the connecting piece, and the pawl is elastically connected to the connecting piece through a second elastic element.

[0015] As an optional solution of the technical solution of the present application document, a positioning sleeve is plugged into the lower part of the moving touch panel, the upper part of the positioning sleeve is arranged in an inclined shape, and the bottom of the positioning sleeve is connected and fixed to the pipe sleeve.

[0016] As an optional solution of the technical solution of this application document, the upper part of the positioning sleeve is inclined outward.

[0017] As an optional solution to the technical solution of the present application document, the upper support arm is rotatably connected to a support rod, the downward rotation angle of the lower end of the support rod is limited, the upper support arm is slidably connected to a terminal block, the terminal block is located below the support rod, the terminal block is elastically connected to the upper support arm through a third elastic element, and the terminal block is electrically connected to the moving touch plate.

[0018] As an optional solution of the technical solution of the present application document, a plurality of hanging rings are fixedly connected to the outer side of the tube sleeve, and an arc extinguishing tube is provided on the outer side of the fuse sleeve.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present application sets a driving mechanism and utilizes the gravitational potential energy when the sleeve falls to drive the sleeve to rotate, thereby changing the position of the fuse; when the sleeve is pushed upward, the intact fuse can contact the terminal block at the same position through the moving contact plate, avoiding changes in the contact position, affecting the reliability of power transmission, or reducing the reliability of the moving contact plate connection.

[0022] 2. The present application sets a support rod and a terminal block so that the support rod can lift the moving touch panel, and the terminal block can contact the terminal block under the action of the third elastic element, thereby avoiding interference from external environmental factors that affect the reliability of circuit connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an electric protection device;

[0024] Figure 2 It is a schematic diagram of the pipe sleeve structure of an electric power protection device;

[0025] Figure 3 It is a schematic diagram of the structure of the lower arm of an electric protection device;

[0026] Figure 4 It is a schematic diagram of the structure of a driving component of an electric protection device;

[0027] Figure 5 It is a schematic diagram of the structure of the upper arm of an electric protection device;

[0028] In the figure: 1. insulating support; 2. lower support arm; 3. sleeve; 301. fuse; 302. conductive slip ring; 303. conductive shaft; 304. positioning sleeve; 305. hanging ring; 306. arc extinguishing tube; 4. upper support arm; 401. support rod; 402. terminal block; 403. third elastic element; 5. connector; 6. drive assembly; 601. block; 6011. first push surface; 602. first elastic element; 603. lever; 6031. second push surface; 7. moving touch plate; 8. ratchet; 9. pawl. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] See also Figure 1 ,The present invention provides an electric power protection device, comprising an insulating support 1, a lower support arm 2, a pipe sleeve 3, and an upper support arm 4;

[0031] The lower arm 2 and the upper arm 4 are fixedly mounted at both ends of the insulating support 1 respectively. The lower part of the sleeve 3 is unidirectionally rotatably connected with a connecting piece 5. The connecting piece 5 is rotatably connected with the lower arm 2. A driving assembly 6 is installed on the lower arm 2. The driving assembly 6 is used to drive the sleeve 3 to rotate. A plurality of fuses 301 are arranged in a ring shape in the sleeve 3. The upper ends of the fuses 301 are connected with moving touch plates 7. The moving touch plates 7 are snap-fitted with the upper arm 4. The fuse 301 is electrically connected to the upper arm 4 through the moving touch plates 7.

[0032] When the device is in use, the upper wire is electrically connected to the lower wire through the upper support arm 4, the movable touch plate 7, the fuse 301, and the lower support arm 2; when the fuse 301 is blown, the sleeve 3 can rotate downward under the action of gravity, so that the movable touch plate 7 is disconnected from the upper support arm 4, thereby ensuring the safety of the power line.

[0033] When the sleeve 3 rotates downward, the driving assembly 6 can drive the sleeve 3 to rotate, so that the movable contact plate 7 at the end of the unblown fuse 301 can rotate upward; when the line needs to be connected, the sleeve 3 is pushed upward to connect the line, thereby increasing the maintenance efficiency. In this way, the change of the contact position between the movable contact plate 7 and the support arm 4 can be avoided, which will cause adverse effects on power transmission.

[0034] like Figure 2 As shown, a conductive slip ring 302 is fixedly connected inside the pipe sleeve 3, the lower end of the fuse 301 is fixed on the conductive slip ring 302, the middle of the conductive slip ring 302 is rotatably connected with a conductive shaft 303, the conductive slip ring 302 is electrically connected to the conductive shaft 303, the conductive shaft 303 is fixedly connected to the connector 5, and the conductive shaft 303 is electrically connected to the lower arm 2. By adopting this technical means, during the downward rotation and self-rotation of the pipe sleeve 3, although the position of the fuse 301 is changed, the fuse 301 can still achieve conduction between the upper wire of the upper arm 4 and the upper wire of the lower arm 2 through the conductive slip ring 302 and the conductive shaft 303.

[0035] like Figure 3 and Figure 4 As shown, the driving assembly 6 includes a clamping block 601, a first elastic element 602, and a lever 603. The clamping block 601 is slidably connected to the lower arm 2. The clamping block 601 is elastically connected to the lower arm 2 through the first elastic element 602. The number of levers 603 is the same as the number of fuses 301. Multiple levers 603 are arranged in a ring and are fixedly connected to the pipe sleeve 3.

[0036] After the fuse 301 is blown, when the sleeve 3 rotates downward, the block 601 can block the lever 603 from moving downward, and the sleeve 3 rotates, so that the blocked block 601 rotates upward, thereby bypassing the block 601 and adjusting the position of the fuse 301.

[0037] A first pushing surface 6011 is provided on one side of the clamping block 601 away from the insulating support 1 , and a second pushing surface 6031 is provided on one side of the lever 603 . The second pushing surface 6031 faces the rotation direction of the sleeve 3 .

[0038] When the tube sleeve 3 is pushed upward to reset, the second pushing surface 6031 of the lever 603 will abut against the first pushing surface 6011 of the block 601. Since the tube sleeve 3 can only rotate toward the second pushing surface 6031, the block 601 is forced to compress the first elastic element 602 and shrink downward. When the lever 603 passes over the block 601, the block 601 can pop up upward, so as to push the tube sleeve 3 to rotate when the tube sleeve 3 falls, so as to adjust the position of the fuse 301.

[0039] In order to realize the one-way rotation of the pipe sleeve 3, a one-way bearing can be used to connect the pipe sleeve 3 and the connecting member 5, and a ratchet 8 can be fixedly connected to the lower part of the pipe sleeve 3, and a pawl 9 is snap-fitted on one side of the ratchet 8, and the pawl 9 is rotatably connected to the connecting member 5, and the pawl 9 is elastically connected to the connecting member 5 through the second elastic element 10. The pawl 9 restricts the ratchet 8 to prevent the pipe sleeve 3 from rotating when the pipe sleeve 3 is pushed upward to reset, thereby changing the position of the fuse 301.

[0040] See also Figure 5 The lower part of the moving touch plate 7 is plugged with a positioning sleeve 304, the upper part of the positioning sleeve 304 is arranged in an inclined state, the upper part of the positioning sleeve 304 is inclined outward, and the bottom of the positioning sleeve 304 is connected and fixed to the pipe sleeve 3, so that the moving touch plate 7 can be placed in an inclined state and fixed above the positioning sleeve 304 through the pulling action of the fuse 301.

[0041] The upper arm 4 is rotatably connected to a support rod 401, and the downward rotation angle of the lower end of the support rod 401 is limited. The upper arm 4 is slidably connected to a wiring board 402, which is located below the support rod 401. The wiring board 402 is elastically connected to the upper arm 4 through a third elastic element 403, and the wiring board 402 is electrically connected to the moving touch plate 7.

[0042] When the sleeve 3 is pushed upward to reset, the movable touch plate 7 can push the wiring board 402 upward, compress the third elastic element 403, and push the lower end of the support rod 401 to rotate upward; when the lower end of the support rod 401 slides off the surface of the movable touch plate 7, the sleeve 3 is released; the sleeve 3 will rotate downward under the action of gravity, so that the bottom of the movable touch plate 7 abuts against the surface of the support rod 401, preventing the sleeve 3 from falling. At this time, the wiring board 402 can be in close contact with the movable touch plate 7 under the action of the elastic element, avoiding external disturbances that may cause the movable touch plate 7 to fall off accidentally.

[0043] After the fuse 301 is blown, the pulling effect on the movable touch plate 7 is lost, the movable touch plate 7 will be separated from the positioning sleeve 304, and the pipe sleeve 3 can fall downward rapidly under the action of gravity, thereby disconnecting the circuit.

[0044] In addition, a plurality of hanging rings 305 are fixedly connected to the outside of the tube sleeve 3, so that the tube sleeve 3 can still be pushed upward through the hanging rings 305 after falling and rotating; an arc extinguishing tube 306 is provided on the outside of the fuse 301 to prevent arcing between the fuses 301 in the tube sleeve 3, causing damage to the bypass fuse 301.

Claims

1. A power protection device, characterized in that: include: Insulating support (1), lower support arm (2), pipe sleeve (3), upper support arm (4); The lower support arm (2) and the upper support arm (4) are respectively fixedly mounted on the two ends of the insulating support (1); the lower part of the pipe sleeve (3) is unidirectionally rotatably connected with a connecting piece (5); the connecting piece (5) is rotatably connected with the lower support arm (2); a driving assembly (6) is mounted on the lower support arm (2); the driving assembly (6) is used to drive the pipe sleeve (3) to rotate; a plurality of fuses (301) are arranged in a ring shape inside the pipe sleeve (3); the upper ends of the fuses (301) are all connected with a moving touch plate (7); the moving touch plate (7) is snap-fitted with the upper support arm (4); and the fuse (301) is electrically connected to the upper support arm (4) via the moving touch plate (7).

2. A power protection device according to claim 1, characterized in that: A conductive slip ring (302) is fixedly connected inside the pipe sleeve (3), the lower end of the fuse (301) is fixed on the conductive slip ring (302), the middle part of the conductive slip ring (302) is rotatably connected to a conductive shaft (303), the conductive slip ring (302) is electrically connected to the conductive shaft (303), the conductive shaft (303) is fixedly connected to the connecting piece (5), and the conductive shaft (303) is electrically connected to the lower support arm (2).

3. The power protection device according to claim 1, characterized in that: The driving assembly (6) comprises a clamping block (601), a first elastic element (602), and a lever (603); the clamping block (601) is slidably connected to the lower arm (2); the clamping block (601) is elastically connected to the lower arm (2) via the first elastic element (602); the number of the levers (603) is the same as the number of the fuses (301); a plurality of the levers (603) are arranged in a ring shape and are fixedly connected to the pipe sleeve (3).

4. A power protection device according to claim 3, characterized in that: A first pushing surface (6011) is provided on a side of the clamping block (601) away from the insulating support (1), and a second pushing surface (6031) is provided on a side of the lever (603), wherein the second pushing surface (6031) faces the rotation direction of the sleeve (3).

5. The power protection device according to claim 1, characterized in that: A ratchet (8) is fixedly connected to the lower part of the pipe sleeve (3), a pawl (9) is snap-fitted on one side of the ratchet (8), the pawl (9) is rotatably connected to the connecting member (5), and the pawl (9) is elastically connected to the connecting member (5) via a second elastic element (10).

6. The power protection device according to claim 1, characterized in that: The lower part of the movable touch plate (7) is plugged with a positioning sleeve (304), the upper part of the positioning sleeve (304) is arranged in an inclined shape, and the bottom of the positioning sleeve (304) is connected and fixed to the pipe sleeve (3).

7. A power protection device according to claim 6, characterized in that: The upper portion of the positioning sleeve (304) is inclined outward.

8. The power protection device according to claim 7, characterized in that: The upper support arm (4) is rotatably connected to a support rod (401), the downward rotation angle of the lower end of the support rod (401) is limited, the upper support arm (4) is slidably connected to a wiring board (402), the wiring board (402) is located below the support rod (401), the wiring board (402) is elastically connected to the upper support arm (4) via a third elastic element (403), and the wiring board (402) is electrically connected to the moving touch plate (7).

9. The power protection device according to claim 1, characterized in that: A plurality of hanging rings (305) are fixedly connected to the outside of the pipe sleeve (3), and an arc extinguishing tube (306) is sleeved on the outside of the fuse (301).

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