Flash barrier

Abstract

The utility model discloses a flash barrier which comprises an installation block and a main plate body, the installation block is provided with an insertion groove corresponding to the main plate body, the outer wall of the installation block is provided with two installation grooves which are symmetrically arranged, transmission rods are rotationally connected in the installation grooves through rotating shafts, and one ends, close to the main plate body, of the transmission rods are fixedly connected with clamping blocks. A clamping groove corresponding to the clamping block is formed in the main plate body, a first wedge block is fixedly connected to the end, away from the clamping block, of the transmission rod, a sliding rod is slidably inserted into the mounting groove, one end of the sliding rod is fixedly connected with a second wedge block corresponding to the first wedge block, the sliding rod is sleeved with a spring, and the two ends of the spring abut against the second wedge block and the inner wall of the mounting groove correspondingly. A connecting rod is arranged at the end, away from the main plate body, of the mounting block, and a plurality of connecting ports are formed in the connecting rod. According to the utility model, through the arrangement of the fixed dismounting structure, the flash barrier can be conveniently dismounted and maintained, so that the maintenance efficiency of the flash barrier is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker accessories, in particular to an arc isolation plate. Background Art

[0002] A circuit breaker is a switch device that can close, carry and interrupt the current under normal circuit conditions and close, carry and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. At present, in low-voltage circuit breakers, the arc extinguishing system usually adopts a grid-type arc extinguishing chamber structure.

[0003] The arc extinguishing chamber in the existing low-voltage circuit breaker is composed of a first fixed plate, a second fixed plate, an insulating arc isolation plate and a plurality of arc extinguishing grids arranged between the first fixed plate and the second fixed plate. During operation, as the moving contact and the static contact are separated, an arc will be generated between the moving contact and the static contact. The insulating walls on both sides are heated and produce gas under the action of the arc. The arc will magnetize the arc extinguishing grids to form a magnetic field that is conducive to the arc extraction, thereby causing the arc to enter the arc extinguishing grids one by one, the arc is elongated, and the arc voltage becomes higher. When the arc voltage is greater than the power supply voltage at both ends, the arc is extinguished.

[0004] However, the existing arc isolation plate has a relatively simple structure, lacks a certain disassembly and fixing structure, and is inconvenient to disassemble and replace, thereby affecting the maintenance efficiency of the arc isolation plate. Utility Model Content

[0005] The utility model aims to solve the problem that the arc isolation plate in the prior art has a relatively simple structure, lacks a certain disassembly and fixing structure, and is inconvenient to disassemble and replace, and proposes an arc isolation plate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An arc isolation plate comprises a mounting block and a main board body, the mounting block is provided with a slot corresponding to the main board body, the outer wall of the mounting block is provided with two mounting slots symmetrically arranged, a transmission rod is rotatably connected in the mounting slot through a rotating shaft, an end of the transmission rod close to the main board body is fixedly connected with a clamping block, the main board body is provided with a clamping slot corresponding to the clamping block, an end of the transmission rod away from the clamping block is fixedly connected with a first wedge block, a sliding rod is slidably inserted in the mounting slot, one end of the sliding rod is fixedly connected with a second wedge block corresponding to the first wedge block, a spring is sleeved on the sliding rod, two ends of the spring are respectively abutted against the second wedge block and the inner wall of the mounting slot, a connecting rod is provided at one end of the mounting block away from the main board body, and a plurality of connecting ports are provided on the connecting rod.

[0008] Preferably, an anti-bending plate is fixedly embedded in the main board.

[0009] Preferably, a torsion spring is sleeved on the rotating shaft, and two ends of the torsion spring are fixedly connected to the transmission rod and the inner wall of the installation groove respectively.

[0010] Preferably, a sliding cavity corresponding to the sliding rod is provided in the installation groove, and one end of the sliding rod located in the sliding cavity is fixedly connected to a limiting block.

[0011] Preferably, a positioning block is fixedly connected in the slot, and a positioning groove corresponding to the positioning block is provided on the main board body.

[0012] Preferably, the connecting rod and the mounting block are rotatably connected.

[0013] Beneficial effects:

[0014] 1. Through the setting of the connecting rod, the mounting block can be conveniently connected to the circuit breaker, and then one end of the main board body is inserted into the slot. Under the elastic support of the spring, the second wedge block is driven by the slide bar to squeeze and lift the first wedge block, so that the card block is driven by the transmission rod to be stuck into the card slot on the main board body to fix the main board body. In the utility model, the arc isolation plate can be conveniently disassembled and maintained by setting the fixed disassembly structure, thereby effectively improving the maintenance efficiency of the arc isolation plate;

[0015] 2. The setting of the limit block can prevent the sliding rod from falling off from the sliding cavity. At the same time, the torsion spring can provide a certain torsion support for the transmission rod. The anti-bending plate can enhance the anti-bending ability of the main board. The connecting port can facilitate the fixing of the connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an arc isolation plate proposed by the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure at point A in .

[0018] In the figure: 1 mounting block, 2 main board body, 3 rotating shaft, 4 transmission rod, 5 clamping block, 6 first wedge block, 7 sliding rod, 8 second wedge block, 9 spring, 10 connecting rod, 11 anti-bending plate, 12 limiting block, 13 positioning block. DETAILED DESCRIPTION

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

[0020] Reference Figure 1-2An arc isolation plate comprises a mounting block 1 and a main board body 2, wherein an anti-bending plate 11 is fixedly embedded in the main board body 2, a slot corresponding to the main board body 2 is provided on the mounting block 1, a positioning block 13 is fixedly connected in the slot, and a positioning groove corresponding to the positioning block 13 is provided on the main board body 2, so as to facilitate the installation and fixing of the main board body 2;

[0021] In this embodiment, two symmetrically arranged mounting grooves are provided on the outer wall of the mounting block 1, and a transmission rod 4 is rotatably connected in the mounting groove through a rotating shaft 3, which is used to drive the clamping block 5 to clamp into or disengage from the clamping groove on the main body 2. A torsion spring is sleeved on the rotating shaft 3, and the two ends of the torsion spring are respectively fixedly connected to the transmission rod 4 and the inner wall of the mounting groove, so as to provide a certain torsion support for the transmission rod 4;

[0022] In this embodiment, the end of the transmission rod 4 close to the main board body 2 is fixedly connected with a card block 5, and the main board body 2 is provided with a card slot corresponding to the card block 5. The end of the transmission rod 4 away from the card block 5 is fixedly connected with a first wedge block 6, which is used to cooperate with the second wedge block 8 to drive the transmission rod 4 to rotate. A slide rod 7 is slidably inserted in the installation groove, and a slide cavity corresponding to the slide rod 7 is provided in the installation groove. One end of the slide rod 7 located in the slide cavity is fixedly connected to a limiting block 12 to prevent the slide rod 7 from falling off from the slide cavity;

[0023] In this embodiment, one end of the slide rod 7 is fixedly connected to the second wedge block 8 corresponding to the first wedge block 6. A spring 9 is sleeved on the slide rod 7. The two ends of the spring 9 are respectively against the second wedge block 8 and the inner wall of the mounting groove, providing a certain elastic support for the second wedge block 8. A connecting rod 10 is provided at the end of the mounting block 1 away from the main board body 2. The connecting rod 10 is provided with a plurality of connecting ports to facilitate the installation and fixation of the connecting rod 10. The connecting rod 10 and the mounting block 1 are rotatably connected.

[0024] In this embodiment, by setting the connecting rod 10, the mounting block 1 can be conveniently connected to the circuit breaker, and then one end of the main board body 2 is inserted into the slot. Under the elastic support of the spring 9, the second wedge block 8 is driven by the slide rod 7 to squeeze and lift the first wedge block 6, so that the card block 5 is driven by the transmission rod 4 to be inserted into the card slot on the main board body 2, thereby fixing the main board body 2.

[0025] In this embodiment, the arc isolation plate can be conveniently disassembled and maintained by providing a fixed disassembly structure, thereby effectively improving the maintenance efficiency of the arc isolation plate.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An arc isolation plate, comprising a mounting block (1) and a main plate body (2), characterized in that: The mounting block (1) is provided with a slot corresponding to the main board body (2), and the outer wall of the mounting block (1) is provided with two symmetrically arranged mounting grooves, a transmission rod (4) is rotatably connected in the mounting groove through a rotating shaft (3), one end of the transmission rod (4) close to the main board body (2) is fixedly connected with a clamping block (5), the main board body (2) is provided with a clamping groove corresponding to the clamping block (5), the end of the transmission rod (4) away from the clamping block (5) is fixedly connected with a first wedge block (6), a sliding rod (7) is slidably inserted in the mounting groove, one end of the sliding rod (7) is fixedly connected with a second wedge block (8) corresponding to the first wedge block (6), a spring (9) is sleeved on the sliding rod (7), and the two ends of the spring (9) are respectively against the second wedge block (8) and the inner wall of the mounting groove, and a connecting rod (10) is provided at one end of the mounting block (1) away from the main board body (2), and a plurality of connecting ports are provided on the connecting rod (10).

2. The arc isolation plate according to claim 1, characterized in that: An anti-folding plate (11) is fixedly embedded in the main board body (2).

3. The arc isolation plate according to claim 1, characterized in that: The rotating shaft (3) is sleeved with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected to the transmission rod (4) and the inner wall of the installation groove.

4. The arc isolation plate according to claim 1, characterized in that: A sliding cavity corresponding to the sliding rod (7) is provided in the installation groove, and one end of the sliding rod (7) located in the sliding cavity is fixedly connected to a limiting block (12).

5. The arc isolation plate according to claim 1, characterized in that: A positioning block (13) is fixedly connected in the slot, and a positioning groove corresponding to the positioning block (13) is provided on the main board body (2).

6. The arc isolation plate according to claim 1, characterized in that: The connecting rod (10) and the mounting block (1) are rotationally connected.

Images