Vacuum circuit breaker

Abstract

The utility model discloses a vacuum circuit breaker which comprises a circuit breaker shell and a solid-sealed polar pole installed on the circuit breaker shell, fixing columns are arranged at the four corners of the bottom of the solid-sealed polar pole, contraction parts are arranged on the outer sides of the fixing columns, a fixing ring is rotationally installed on the top of the inner wall of the circuit breaker shell, and a fixing groove and a through hole are formed in the fixing ring in a penetrating mode. An arc-shaped box is fixedly connected to the inner side wall of the circuit breaker shell, an opening is formed in one side of the arc-shaped box, a second supporting column is arranged on the inner wall of the opening, a first supporting column is arranged on the outer side of the fixing ring, a spring is arranged between the first supporting column and the second supporting column in a sleeving mode, and an extension part is arranged on the outer side of the fixing ring; according to the utility model, the contraction part, the fixing column, the fixing ring, the through hole, the fixing groove, the vertical rod, the shifting block, the first supporting column, the second supporting column and the spring are arranged, so that the disassembly and assembly steps of the solid-sealed polar pole are greatly simplified, the disassembly and assembly difficulty is reduced, and the disassembly and assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a vacuum circuit breaker. Background Art

[0002] A vacuum circuit breaker is a low-voltage electrical device with an arc extinguishing function. It is named because its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum. In a vacuum circuit breaker, the vacuum arc extinguishing chamber, conductive connections or terminals are usually encapsulated with solid insulating materials to form a sealed pole. The sealed pole can reduce the impact of the external environment on the vacuum arc extinguishing chamber.

[0003] Four threaded inserts are provided on the end face of one end of the sealed pole of the existing vacuum circuit breaker. The sealed pole is fixedly installed on the circuit breaker housing by the threaded inserts and matching bolts. However, when installing or disassembling the sealed pole in this way, a large number of bolts need to be screwed, the steps are relatively cumbersome, and the disassembly and assembly efficiency is low. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum circuit breaker to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum circuit breaker, comprising a circuit breaker housing, and a sealed pole installed on the circuit breaker housing, wherein fixing columns are provided at the four corners of the bottom of the sealed pole, a contraction portion is provided on the outer side of the fixing column, a fixing ring is rotatably installed on the top of the inner wall of the circuit breaker housing, a fixing groove and a through hole are penetrated through the fixing ring, and the fixing groove and the through hole are communicated, an arc box is fixedly connected to the inner side wall of the circuit breaker housing, an opening is opened on one side of the arc box, a second supporting column is provided on the inner wall of the opening, a first supporting column is provided on the outer side of the fixing ring, a spring is sleeved between the first supporting column and the second supporting column, an extension portion is provided on the outer side of the fixing ring, a vertical rod is fixedly connected to the extension portion, and a shift block is fixedly connected to the top of the vertical rod.

[0006] As a preferred solution of the utility model, an avoidance groove is provided on the circuit breaker housing, and the vertical rod is slidably connected to the avoidance groove.

[0007] As a preferred solution of the utility model, the diameter of the through hole is greater than the width of the fixing groove, the diameter of the fixing column is equal to the diameter of the through hole, and the diameter of the contraction portion is equal to the width of the fixing groove.

[0008] As a preferred solution of the utility model, a mounting hole is provided on the top of the circuit breaker housing, and the diameter of the mounting hole is equal to the diameter of the fixing column.

[0009] As a preferred solution of the utility model, a limit buckle is fixedly connected to the inner wall of the circuit breaker housing, and the fixing ring is slidably connected to the limit buckle.

[0010] As a preferred solution of the utility model, the length of the contraction portion is equal to the thickness of the upper fixing ring.

[0011] As a preferred solution of the utility model, a bottom plate is detachably mounted on the bottom of the circuit breaker housing.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model greatly simplifies the disassembly and assembly steps of the sealed pole by arranging the contraction part, the fixing column, the fixing ring, the through hole, the fixing groove, the vertical rod, the shift block, the first supporting column, the second supporting column and the spring, reduces the disassembly and assembly difficulty and improves the disassembly and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure inside the housing of the circuit breaker of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the solid-sealed pole of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the fixing ring of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the arc box of the utility model;

[0018] Figure 6 It is a structural schematic diagram of the circuit breaker housing of the utility model.

[0019] In the figure: 1. circuit breaker housing; 2. sealed pole; 3. bottom plate; 4. avoidance groove; 5. vertical rod; 6. shift block; 7. fixing column; 8. through hole; 9. extension part; 10. limit buckle; 11. fixing ring; 12. arc box; 13. contraction part; 14. first support column; 15. fixing groove; 16. second support column; 17. spring; 18. opening; 19. mounting hole. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figures 1 to 6 The utility model provides a technical solution: a vacuum circuit breaker, comprising a circuit breaker housing 1, and a sealed pole 2 installed on the circuit breaker housing 1, wherein the four corners of the bottom of the sealed pole 2 are provided with fixing columns 7, and the outer side of the fixing column 7 is provided with a contraction portion 13, and a fixing ring 11 is rotatably installed on the top of the inner wall of the circuit breaker housing 1, and a fixing groove 15 and a through hole 8 are penetrated on the fixing ring 11, and the fixing groove 15 and the through hole 8 are communicated. When installing the sealed pole 2, it is only necessary to rotate the fixing ring 11 by means of a shifting block 6 until the through hole 8 is aligned with the mounting hole 19, and the fixing ring 11 passes through the fixing groove 15 during the rotation process. The first support column 14 compresses the spring 17, and then the sealed pole 2 is taken, and the fixing column 7 is inserted into the mounting hole 19. The bottom of the fixing column 7 passes through the mounting hole 19 and the through hole 8 in sequence. When the bottom of the sealed pole 2 is tightly attached to the top of the circuit breaker housing 1, the contraction portion 13 is completely in the through hole 8. The shift block 6 is released, and the spring 17 pops open to reset the fixing ring 11, so that the fixing groove 15 moves to the outside of the contraction portion 13, and the fixing column 7 cannot pass through the fixing groove 15, so as to fix the sealed pole 2. When disassembling the sealed pole 2, it is only necessary to rotate the fixing ring 11 through the shift block 6 until When the through hole 8 is aligned with the fixing column 7, the sealed pole 2 can be disassembled, which greatly simplifies the disassembly and assembly steps of the sealed pole 2, reduces the difficulty of disassembly and assembly, and improves the disassembly and assembly efficiency. The inner wall of the circuit breaker housing 1 is fixedly connected with an arc box 12, one side of the arc box 12 is provided with an opening 18, and the inner wall of the opening 18 is provided with a second support column 16. The outer side of the fixing ring 11 is provided with a first support column 14, and the first support column 14 and the second support column 16 are used to limit the spring 17 to prevent the spring 17 from deflecting. The spring 17 is sleeved between the first support column 14 and the second support column 16. 7 is used to apply a thrust to the first support column 14, and then apply a thrust to the fixing ring 11, so that in the absence of external force, the contraction portion 13 is in the fixing groove 15, and the fixing column 7 is staggered with the through hole 8 to ensure that the sealed pole 2 can always be fixed. An extension portion 9 is provided on the outer side of the fixing ring 11, and the extension portion 9 can shield the avoidance groove 4 to prevent external impurities from entering the circuit breaker housing 1 through the avoidance groove 4. A vertical rod 5 is fixedly connected to the extension portion 9, and a shift block 6 is fixedly connected to the top of the vertical rod 5. The vertical rod 5 and the shift block 6 are provided to facilitate the staff to rotate the fixing ring 11.

[0022] The circuit breaker housing 1 is provided with an avoidance groove 4, which is used to avoid the vertical rod 5 to prevent the vertical rod 5 from being blocked by the circuit breaker housing 1 and unable to move. The vertical rod 5 is slidably connected to the avoidance groove 4.

[0023] Among them, the diameter of the through hole 8 is greater than the width of the fixing groove 15, the diameter of the fixing column 7 is equal to the diameter of the through hole 8, and the diameter of the contraction portion 13 is equal to the width of the fixing groove 15, so that the fixing column 7 can pass through the through hole 8 but cannot pass through the fixing groove 15, thereby facilitating the fixation of the sealed pole 2.

[0024] A mounting hole 19 is provided on the top of the circuit breaker housing 1 , and the mounting hole 19 facilitates the fixing column 7 and the contraction portion 13 to be inserted into the circuit breaker housing 1 for installation and fixation. The diameter of the mounting hole 19 is equal to the diameter of the fixing column 7 .

[0025] The inner wall of the circuit breaker housing 1 is fixedly connected with a limit buckle 10, which is used to limit a fixing ring 11 to prevent the fixing ring 11 from being separated from the circuit breaker housing 1, and the fixing ring 11 is slidably connected to the limit buckle 10.

[0026] Among them, the length of the contraction part 13 is equal to the thickness of the upper fixing ring 11, so that after the sealed pole 2 is installed, the contraction part 13 just completely enters the fixing groove 15, and the top and bottom of the fixing column 7 are tightly attached to the fixing ring 11, thereby preventing the sealed pole 2 from loosening in the vertical direction.

[0027] A bottom plate 3 is detachably mounted on the bottom of the circuit breaker housing 1 , and other components can be conveniently installed in the circuit breaker housing 1 through the detachable bottom plate 3 .

[0028] Specifically, when the sealed pole 2 needs to be installed, the vertical rod 5 is moved by the shift block 6, and the vertical rod 5 moves the fixing ring 11, and the vertical rod 5 slides in the avoidance groove 4. When the vertical rod 5 moves to the end of the avoidance groove 4 and is blocked by the circuit breaker housing 1, the through hole 8 is aligned with the mounting hole 19, and the fixing ring 11 drives the first support column 14 to move during the movement. The first support column 14 compresses the spring 17, and then the sealed pole 2 can be taken out, and the fixing column 7 is inserted into the mounting hole 19. The bottom of the fixing column 7 passes through the mounting hole 19 in sequence. 9 and the through hole 8, so that the bottom of the sealed pole 2 is tightly attached to the top of the circuit breaker housing 1. At this time, the contraction part 13 is completely in the through hole 8, and the shift block 6 is released. The spring 17 pops open and passes through the first support column 14 to reset and rotate the fixing ring 11. The fixing ring 11 moves the fixing groove 15 to the outside of the contraction part 13, and the fixing column 7 cannot pass through the fixing groove 15, thereby fixing the sealed pole 2. When disassembling the sealed pole 2, the fixing ring 11 is rotated by the shift block 6 to align the through hole 8 with the fixing column 7, and the sealed pole 2 can be disassembled.

[0029] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0031] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum circuit breaker, comprising a circuit breaker housing (1), and a sealed pole (2) mounted on the circuit breaker housing (1), characterized in that: The four corners of the bottom of the sealed pole (2) are provided with fixing columns (7), and a contraction portion (13) is provided on the outer side of the fixing column (7). A fixing ring (11) is rotatably mounted on the top of the inner wall of the circuit breaker housing (1), and a fixing groove (15) and a through hole (8) are penetrated through the fixing ring (11), and the fixing groove (15) and the through hole (8) are communicated. An arc box (12) is fixedly connected to the inner wall of the circuit breaker housing (1), and an opening (18) is opened on one side of the arc box (12). A second supporting column (16) is provided on the inner wall of the opening (18). A first supporting column (14) is provided on the outer side of the fixing ring (11), and a spring (17) is sleeved between the first supporting column (14) and the second supporting column (16). An extension portion (9) is provided on the outer side of the fixing ring (11), and a vertical rod (5) is fixedly connected to the extension portion (9), and a shifting block (6) is fixedly connected to the top of the vertical rod (5).

2. The vacuum circuit breaker according to claim 1, characterized in that: The circuit breaker housing (1) is provided with an escape groove (4), and the vertical rod (5) is slidably connected to the escape groove (4).

3. The vacuum circuit breaker according to claim 1, characterized in that: The diameter of the through hole (8) is greater than the width of the fixing groove (15), the diameter of the fixing column (7) is equal to the diameter of the through hole (8), and the diameter of the contraction portion (13) is equal to the width of the fixing groove (15).

4. The vacuum circuit breaker according to claim 1, characterized in that: The top of the circuit breaker housing (1) is provided with a mounting hole (19), and the diameter of the mounting hole (19) is equal to the diameter of the fixing column (7).

5. The vacuum circuit breaker according to claim 1, characterized in that: The inner wall of the circuit breaker housing (1) is fixedly connected to a limit buckle (10), and the fixing ring (11) is slidably connected to the limit buckle (10).

6. The vacuum circuit breaker according to claim 1, characterized in that: The length of the contraction portion (13) is equal to the thickness of the upper fixing ring (11).

7. The vacuum circuit breaker according to claim 1, characterized in that: A bottom plate (3) is detachably mounted on the bottom of the circuit breaker housing (1).

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