Switch arc extinguish chamber

Abstract

The utility model discloses a switch arc extinguish chamber which structurally comprises an arc extinguish support, a supporting body is formed in the middle of the arc extinguish support, a containing cavity is formed in the supporting body, a permanent magnet is arranged in the containing cavity, the containing cavity is of a structure with an open lower portion, and a through opening is formed in the containing cavity. A plurality of left grid pieces and right grid pieces are correspondingly distributed on the left and right sides of the supporting main body in an array manner; in daily use, the left grid piece or the right grid piece can be independently maintained and replaced according to needs, and the use and maintenance cost of the arc extinguish chamber is effectively reduced while the arc extinguish effect of the arc extinguish chamber is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing chambers, and more specifically, to a switch arc extinguishing chamber. Background Art

[0002] As the power system's requirements for power supply and power transmission and distribution equipment continue to increase, the voltage that switchgear has to bear is getting higher and higher, and it is becoming more and more difficult to extinguish arcs. The arc extinguishing chamber is an important component of the switchgear. When the moving and static contacts in the conductive circuit are opened, the generated arc enters the arc extinguishing chamber under the drive of the magnetic field. The arc extinguishing grid in the arc extinguishing chamber cuts the arc into multiple short arcs in series, thereby increasing the arc voltage and achieving arc extinguishing.

[0003] At present, a Chinese patent with a publication (announcement) number of CN107112153B discloses an arc control device, comprising a stack of arc splitter plates, the splitter plates defining an entrance of an extinguishing chamber facing an electrical contact, and a back of the extinguishing chamber; and at least one permanent magnet, which is arranged inside the extinguishing chamber, located in a central area along the width direction of the extinguishing chamber and beside the back of the extinguishing chamber, the magnet having a magnetization intensity, and the magnetization intensity has a non-zero component along an axis extending between the entrance and the back of the extinguishing chamber;

[0004] When the above-mentioned arc control device is in use, the arc enters the arc extinguishing chamber, and the Lorentz force generated by the permanent magnet 5 causes the arc to deviate to the side of the arc blowing magnet, so that the arc contacts the left or right part of the arc extinguishing grid and extinguishes the arc. Since the positive and negative poles of the switching device are kept fixed during use, the arc will often only act on the left or right side of the arc extinguishing grid. Therefore, after long-term use, the side of the arc extinguishing grid that contacts the arc more will produce black carbide due to the high temperature and high pressure of the arc, which will further affect the overall arc extinguishing effect of the arc extinguishing grid and the arc extinguishing chamber. Therefore, the arc extinguishing grid needs to be maintained and replaced, but since the arc extinguishing grid is an integrated sheet structure, even if only one side of the arc extinguishing grid is damaged, the arc extinguishing grid needs to be replaced as a whole, which increases the use and maintenance cost of the arc extinguishing chamber. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a switch arc extinguishing chamber to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a switch arc extinguishing chamber, including an arc extinguishing bracket, a supporting body is formed in the middle of the arc extinguishing bracket, a receiving cavity is formed inside the supporting body and a permanent magnet is built in the receiving cavity, the receiving cavity is an open structure at the bottom and is formed with a through opening, and a plurality of left grid plates and right grid plates are arranged in an array on the left and right sides of the supporting body in correspondence with each other.

[0007] The utility model is further configured as follows: a left grid sheet and a right grid sheet are arranged in an array, and each left grid sheet or right grid sheet is assembled and spliced ​​by two arc-isolating grid sheets.

[0008] The utility model is further configured as follows: a first matching protrusion and a second matching protrusion are respectively arranged on the outer side of the left grid sheet or the right grid sheet, and an assembly hole adapted to the first matching protrusion or the second matching protrusion is opened on the arc isolation grid sheet array.

[0009] The utility model is further configured as follows: both sides of the support body are provided with assembly recesses, and the inner sides of the left grid sheet and the right grid sheet are both formed with third matching protrusions adapted to the assembly recesses.

[0010] The utility model is further configured as follows: an upper support portion and a lower support portion are respectively provided on the left and right sides of the support body, and in the assembled state, the upper support portion and the lower support portion are respectively located between two corresponding adjacent left grid sheets or right grid sheets.

[0011] The utility model is further configured as follows: upper abutment parts are formed on the left and right sides of the support body above the upper support part, and a matching interval adapted to the left grid sheet or the right grid sheet is formed between the upper abutment parts and the upper support part.

[0012] The utility model is further configured as follows: reinforcing ribs are arranged on both sides of the supporting body on the upper surface of the arc extinguishing bracket.

[0013] In summary, the utility model has the following beneficial effects: in daily use, the left grid or the right grid can be maintained and replaced separately as needed, which effectively reduces the use and maintenance costs of the arc extinguishing chamber while ensuring the arc extinguishing effect of the arc extinguishing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0016] Figure 2 It is a schematic cross-sectional view of the structure of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the arc-extinguishing bracket of the utility model;

[0018] Figure 4 It is a schematic diagram of assembling the left grid piece or the right grid piece and the arc-isolating grid piece of the utility model;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the left grid plate or the right grid plate of the utility model.

[0020] Figure numerals: 1, arc-extinguishing bracket; 2, left grid; 20, right grid; 21, first matching protrusion; 22, second matching protrusion; 23, third matching protrusion; 3, arc-isolating grid; 30, assembly hole; 4, supporting body; 40, accommodating cavity; 41, permanent magnet; 42, through opening; 43, assembly recess; 44, upper supporting part; 45, lower supporting part; 46, upper abutment part; 47, reinforcing rib. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 As shown, a switch arc extinguishing chamber of an embodiment of the utility model includes an arc extinguishing bracket 1, a supporting body 4 is formed in the middle of the arc extinguishing bracket 1, a receiving cavity 40 is formed inside the supporting body 4, and a permanent magnet 41 is built into the receiving cavity 40, the receiving cavity 40 is an open structure at the bottom and is formed with a through opening 42, and a plurality of left grid plates 2 and right grid plates 20 are arranged in an array on the left and right sides of the supporting body 4 in correspondence with each other.

[0023] When in use, the permanent magnet 41, the left grid sheet 2 and the right grid sheet 20 are installed on the arc extinguishing bracket 1, the permanent magnet 41 is installed in the accommodating cavity 40, and the left grid sheet 2 or the right grid sheet 20 are respectively installed in an array on the left and right sides of the supporting body 4, and the arc extinguishing chamber is assembled and installed at a preset position;

[0024] When the switch device is turned on and off, the arc is prompted to enter the arc extinguishing chamber. Due to the Lorentz force generated by the permanent magnet 41, the arc enters the left grid 2 or the right grid 20 and is extinguished. In daily use, the left grid 2 or the right grid 20 can be maintained and replaced separately as needed, which effectively reduces the use and maintenance costs of the arc extinguishing chamber while ensuring the arc extinguishing effect of the arc extinguishing chamber.

[0025] The left grid plate 2 and the right grid plate 20 are arranged in an array, and each left grid plate 2 or right grid plate 20 is assembled and spliced ​​by two arc isolation grid plates 3 .

[0026] When in use, each left grid piece 2 and right grid piece 20 are assembled and spliced ​​through two arc-isolating grid pieces 3, so as to ensure the installation stability of the left grid piece 2 and the right grid piece 20, thereby improving the overall strength of the arc-extinguishing chamber.

[0027] A first matching protrusion 21 and a second matching protrusion 22 are respectively disposed on the outer side of the left grid plate 2 or the right grid plate 20 , and an array of assembly holes 30 adapted to the first matching protrusion 21 or the second matching protrusion 22 are opened in the arc isolation grid plate 3 .

[0028] When in use, each first protrusion and the second protrusion are respectively in interference fit with the corresponding assembly hole 30, and the interference fit connection method can ensure the stability of the connection and improve the convenience of disassembly and assembly; wherein the arc-extinguishing grid is made of insulating material.

[0029] Both sides of the support body 4 are provided with assembly recesses 43, and the inner sides of the left grid plate 2 and the right grid plate 20 are formed with third matching protrusions 23 that are adapted to the assembly recesses 43; the left and right sides of the support body 4 are respectively provided with upper supporting parts 44 and lower supporting parts 45, which are respectively located between the corresponding two adjacent left grid plates 2 or right grid plates 20 in the assembled state; upper abutting parts 46 are formed on the left and right sides of the support body 4 above the upper supporting parts 44, and a matching interval that is adapted to the left grid plate 2 or the right grid plate 20 is formed between the upper abutting parts 46 and the upper supporting parts 44.

[0030] When in use, each left grid piece 2 is assembled with two corresponding arc-isolating grid pieces 3 to form a left arc-extinguishing unit, and each right grid piece 20 is assembled with two corresponding arc-isolating grid pieces 3 to form a right arc-extinguishing unit, and then the left arc-extinguishing unit and the right arc-extinguishing unit are respectively installed and fixed to the left and right sides of the supporting body 4 to complete the assembly of the arc-extinguishing chamber;

[0031] The left grid piece 2 and the right grid piece 20 are made of magnetic materials that can generate magnetic attraction with the permanent magnet 41. In the assembled state, the left arc extinguishing unit and the right arc extinguishing unit are stably installed on both sides of the support body 4 through the magnetic attraction between the left grid piece 2 and the right grid piece 20 and the permanent magnet 41;

[0032] Further, when the left arc extinguishing unit and the right arc extinguishing unit are in the installed state, the horizontal limit is achieved by the cooperation between each third matching protrusion 23 and the assembly recess 43, the left grid piece 2 or the right grid piece 20 located at the top is located between the upper support portion 44 and the upper abutment portion 46 to achieve the upper limit of the left arc extinguishing unit or the right arc extinguishing unit, and the lower support portion 45 is located between the two adjacent left grid pieces 2 or right grid pieces 20 at the bottom to achieve the lower limit of the left arc extinguishing unit or the right arc extinguishing unit;

[0033] The left arc extinguishing unit and the right arc extinguishing unit are respectively assembled to the left and right sides of the support unit through the limiting cooperation provided by the upper support part 44, the upper abutment part 46, the lower support part 45 and the assembly recess 43, and the magnetic attraction of the permanent magnet 41, ensuring the stability of the assembly while facilitating disassembly.

[0034] The upper surface of the arc-extinguishing support 1 is provided with reinforcing ribs 47 on both sides of the supporting body 4 .

[0035] When in use, the overall strength of the support body 4 and the arc-extinguishing bracket 1 is effectively improved by providing the reinforcing ribs 47 .

[0036] It should also be pointed out that the terms used in the present invention, such as “front”, “rear”, “vertical”, “horizontal”, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0037] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A switch arc extinguishing chamber, characterized in that: The invention comprises an arc extinguishing bracket (1), wherein a supporting body (4) is formed in the middle of the arc extinguishing bracket (1), a receiving cavity (40) is formed inside the supporting body (4), and a permanent magnet (41) is built in the receiving cavity (40), the receiving cavity (40) is a lower open structure and is formed with a through opening (42), and a plurality of left grid plates (2) and right grid plates (20) are arranged in an array on the left and right sides of the supporting body (4) in correspondence with each other.

2. The switch arc extinguishing chamber according to claim 1, characterized in that: The left grid plates (2) and the right grid plates (20) are arranged in an array, and each of the left grid plates (2) or the right grid plates (20) is assembled and spliced ​​through two arc-isolating grid plates (3).

3. The switch arc extinguishing chamber according to claim 2, characterized in that: A first matching protrusion (21) and a second matching protrusion (22) are respectively arranged on the outside of the left grid plate (2) or the right grid plate (20), and the arc isolation grid plate (3) array is provided with assembly holes (30) adapted to the first matching protrusion (21) or the second matching protrusion (22).

4. The switch arc extinguishing chamber according to claim 1, characterized in that: Both sides of the support body (4) are provided with assembly recesses (43), and the inner sides of the left grid plate (2) and the right grid plate (20) are both formed with third matching protrusions (23) that match the assembly recesses (43).

5. The switch arc extinguishing chamber according to claim 4, characterized in that: The left and right sides of the support body (4) are respectively provided with an upper support portion (44) and a lower support portion (45); in the assembled state, the upper support portion (44) and the lower support portion (45) are respectively located between two corresponding adjacent left grid plates (2) or right grid plates (20).

6. The switch arc extinguishing chamber according to claim 1, characterized in that: An upper abutment portion (46) is formed on the left and right sides of the support body (4) above the upper support portion (44), and a matching interval adapted to the left grid plate (2) or the right grid plate (20) is formed between the upper abutment portion (46) and the upper support portion (44).

7. The switch arc extinguishing chamber according to claim 1, characterized in that: The upper surface of the arc-extinguishing bracket (1) is provided with reinforcing ribs (47) on both sides of the supporting body (4).

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