Vacuum circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, and discloses a vacuum circuit breaker which comprises a shell, a support is arranged on the side face of the shell, a voltage transformer is detachably connected to the upper portion of the support, an insertion rod is arranged on the lower end face of the insertion rod, and an insertion hole for the insertion rod to penetrate through is formed in the support. And the insertion rod is in external threaded connection with a locking nut. The voltage transformer replacement device has the effect of improving the replacement efficiency of the voltage transformer.

Description

Technical Field

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

[0002] A vacuum circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions, and can close, carry and interrupt current under abnormal circuit conditions within a specified time.

[0003] In the related art, a vacuum circuit breaker comprises a housing, a cover and a voltage transformer, wherein a plug of the voltage transformer is inserted into the housing and the two are connected by a fastener. The bottom of the housing is connected to the cover.

[0004] When the voltage transformer is damaged and needs to be replaced, it is necessary to first separate the cover from the base, and then operate the fasteners to separate the voltage transformer from the housing. The operation is cumbersome and needs to be improved. Utility Model Content

[0005] In order to improve the replacement efficiency of a voltage transformer, the present application provides a vacuum circuit breaker.

[0006] The present application provides a vacuum circuit breaker, which adopts the following technical solution:

[0007] A vacuum circuit breaker comprises a shell, a bracket is arranged on the side of the shell, a voltage transformer is detachably connected to the top of the bracket, a plug rod is arranged on the lower end face of the voltage transformer, a plug hole for the plug rod to pass through is opened on the bracket, and the plug rod is externally threadedly connected to a locking nut located below the bracket.

[0008] By adopting the above technical solution, when the voltage transformer needs to be replaced, the voltage transformer bracket is directly disassembled and replaced, which saves the replacement time of the voltage transformer and improves the maintenance efficiency of the voltage transformer.

[0009] Optionally, the bracket includes two parallel side plates, a second fixing plate is arranged between the two side plates, a first fixing plate is arranged below the second fixing plate, and the end surface of the side plate facing the shell is coplanar with the end surface of the first fixing plate facing the shell.

[0010] By adopting the above technical solution, after the bracket is connected to the shell, the side plate contacts the shell, and the gravity of the voltage transformer on the bracket can be transferred to the shell through the side plate, reducing the probability of damage to the bracket.

[0011] Optionally, a locking structure connecting the bracket and the shell is provided between the two.

[0012] By adopting the above technical solution, the bracket can be connected to or separated from the shell through the locking structure.

[0013] Optionally, the locking structure includes a first bolt arranged on the shell, the first fixing plate is provided with a fixing hole for the first bolt to pass through, the first bolt is externally threadedly connected to a first nut, and the first nut is located on a side of the first fixing plate away from the shell.

[0014] By adopting the above technical solution, the first bolt and the first nut are used to facilitate the installation of the bracket on the housing or the removal of the bracket from the housing, which plays a role in facilitating the replacement of parts.

[0015] Optionally, a handle is provided on the end surface of the second fixing plate away from the shell.

[0016] By adopting the above technical solution, the handle makes it convenient for workers to lift the circuit breaker and move the circuit breaker to a designated position.

[0017] Optionally, the handle is integrally formed with the second fixing plate.

[0018] By adopting the above technical solution, the process of assembling the handle is reduced and the production efficiency of the handle is improved.

[0019] Optionally, the lower end surface of the shell is provided with a support foot.

[0020] By adopting the above technical solution, the support legs provide stable support for the pole-mounted vacuum circuit breaker, ensuring that it is firmly installed on the pole.

[0021] Optionally, the locking structure includes an operating plate and a second bolt arranged on the side of the shell facing the bracket, the operating plate is located on the horizontal side of the first fixed plate, the end surface of the operating plate facing the bracket is provided with an operating hole in the shape of a vertical waist hole, the end surface of the side plate facing the operating plate is provided with a circular hole aligned with the operating hole, the second bolt is passed through the circular hole and the operating hole, and the second bolt is threaded with a second nut.

[0022] By adopting the above technical solution, after loosening the second nut, the bracket can be driven to move in the vertical direction, thereby adjusting the height of the voltage transformer.

[0023] Optionally, a countersunk groove communicating with the circular hole is provided on the end surface of the side plate away from the operating plate.

[0024] By adopting the above technical solution, when the second nut is connected with the second bolt, the head of the second bolt is embedded in the countersunk groove. During the installation of the second bolt and the second nut, there is no need to limit and lock the second bolt, which saves effort.

[0025] Optionally, two limit plates are provided on the end surface of the operating panel facing the side plate, the two limit plates are distributed along the vertical direction, and the bracket is located between the two limit plates.

[0026] By adopting the above technical solution, when the bracket collides with the upper limit plate, the bracket is restricted from continuing to rise. Similarly, when the bracket collides with the lower limit plate, the bracket is restricted from continuing to descend, thereby playing a limiting role; the limit plate can improve the connection strength between the operating panel shells.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the voltage transformer needs to be replaced, the voltage transformer bracket can be directly disassembled and replaced, which saves the replacement time of the voltage transformer and improves the maintenance efficiency of the voltage transformer;

[0029] 2. The handle makes it easier for workers to carry the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a schematic diagram of the structure of Example 1 of the present application;

[0032] Figure 2 is a partial structural schematic diagram highlighting the locking structure in Example 1;

[0033] Figure 3 is a partial structural schematic diagram highlighting the locking structure in Example 2;

[0034] Figure 4 It is a schematic diagram of the structure of the bracket.

[0035] Figure numerals: 1. Shell; 11. Support foot; 2. Voltage transformer; 21. Rod; 22. Locking nut; 3. Bracket; 31. First fixing plate; 32. Second fixing plate; 33. Side plate; 331. Countersunk groove; 332. Round hole; 34. Locking structure; 341. First bolt; 342. First nut; 343. Operating panel; 3431. Operating hole; 344. Second bolt; 345. Second nut; 346. Limiting plate; 35. Handle. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-4 This application is described in further detail.

[0037] Example 1

[0038] This embodiment discloses a vacuum circuit breaker. Figure 1A vacuum circuit breaker includes a housing 1 and a voltage transformer 2. The housing 1 is provided with brackets 3 at both end faces along the length direction. A support leg 11 is fixedly connected to the lower end face of the housing 1.

[0039] Reference Figure 2 The bracket 3 includes a first fixing plate 31, a second fixing plate 32, a side plate 33 and a locking structure 34. Two side plates 33 are provided, and the two side plates 33 are parallel to each other.

[0040] Reference Figure 2 The first fixing plate 31 and the second fixing plate 32 are both arranged between the two side plates 33. The first fixing plate 31 is located below the second fixing plate 32, and the upper end surface of the first fixing plate 31 is fixedly connected to the second fixing plate 32. The end surface of the second fixing plate 32 facing the housing 1 is coplanar with the end surface of the side plate 33 facing the housing 1. A fixing hole is provided on the end surface of the first fixing plate 31 facing the housing 1. A handle 35 is integrally formed on the end surface of the second fixing plate 32 away from the housing 1.

[0041] Reference Figure 2 The locking structure 34 includes a first bolt 341 and a first nut 342. The rod of the first bolt 341 passes through the housing 1 and the fixing hole in sequence and extends out of the housing 1. The first nut 342 is threadedly connected with the first bolt 341.

[0042] Reference Figure 2 The voltage transformer 2 is detachably connected to the second fixing plate 32, and the lower end surface of the voltage transformer 2 is fixedly connected with the plug rod 21. The upper end surface of the second fixing plate 32 is provided with a plug hole, and the plug hole can be inserted into the plug rod 21. The plug rod 21 is threadedly connected with a locking nut 22, and the locking nut 22 abuts against the lower end surface of the second fixing plate 32.

[0043] The implementation principle of Example 1 is: separate the locking nut 22 from the insertion rod 21, then separate the damaged voltage transformer 2 from the bracket 3, install a new voltage transformer 2 on the bracket 3, and fix the bracket 3 and the voltage transformer 2 again with the locking nut 22.

[0044] Example 2

[0045] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the locking structure 34 includes an operating plate 343 , a second bolt 344 and a second nut 345 .

[0046] Reference Figure 3 and Figure 4 There are two operation plates 343, which are fixedly connected to the end surface of the housing 1 facing the bracket 3. The bracket 3 is located between the two operation plates 343. The end surface of the operation plate 343 facing the bracket 3 is provided with an operation hole 3431, which is in the shape of a vertical waist hole.

[0047] Reference Figure 3 and Figure 4 The end surface of the side plate 33 away from the operating plate 343 is provided with a countersunk groove 331, and the bottom wall of the countersunk groove 331 is provided with a round hole 332, which is aligned with the operating hole 3431. The rod of the second bolt 344 passes through the countersunk groove 331, the round hole 332 and the operating hole 3431, and is fixedly connected with the second nut 345. Further, the second nut 345 is a butterfly nut.

[0048] Reference Figure 3 and Figure 4 The end surface of the operation plate 343 facing the side plate 33 is fixedly connected with two limit plates 346 , and the two limit plates 346 are both fixedly connected to the housing 1 . The bracket 3 is located between the two limit plates 346 .

[0049] The implementation principle of Example 2 is: loosening the second nut 345 can drive the bracket 3 to move in the vertical direction, thereby adjusting the height of the bracket 3 and the voltage transformer 2, and after the bracket 3 moves to the specified position, the bracket 3 is fixed by the second nut 345.

[0050] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0051] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A vacuum circuit breaker, comprising a housing (1), characterized in that: A bracket (3) is provided on the side of the housing (1); a voltage transformer (2) is detachably connected to the upper side of the bracket (3); a plug rod (21) is provided on the lower end face of the voltage transformer (2); a plug hole for the plug rod (21) to pass through is provided on the bracket (3); and the plug rod (21) is externally threadedly connected to a locking nut (22) located below the bracket (3).

2. A vacuum circuit breaker according to claim 1, characterized in that: The bracket (3) comprises two mutually parallel side plates (33), a second fixing plate (32) is arranged between the two side plates (33), a first fixing plate (31) is arranged below the second fixing plate (32), and an end surface of the side plate (33) facing the shell (1) is coplanar with an end surface of the first fixing plate (31) facing the shell (1).

3. A vacuum circuit breaker according to claim 2, characterized in that: A locking structure (34) is provided between the bracket (3) and the housing (1) to connect the two.

4. A vacuum circuit breaker according to claim 3, characterized in that: The locking structure (34) comprises a first bolt (341) arranged on the housing (1); a fixing hole for the first bolt (341) to pass through is provided on the first fixing plate (31); the first bolt (341) is externally threadedly connected to a first nut (342); and the first nut (342) is located on a side of the first fixing plate (31) away from the housing (1).

5. A vacuum circuit breaker according to claim 2, characterized in that: A handle (35) is provided on the end surface of the second fixing plate (32) away from the housing (1).

6. A vacuum circuit breaker according to claim 5, characterized in that: The handle (35) and the second fixing plate (32) are integrally formed.

7. A vacuum circuit breaker according to claim 1, characterized in that: The lower end surface of the housing (1) is provided with a support foot (11).

8. A vacuum circuit breaker according to claim 3, characterized in that: The locking structure (34) comprises an operating plate (343) and a second bolt (344) arranged on the side of the housing (1) facing the bracket (3); the operating plate (343) is located on the horizontal side of the first fixing plate (31); the end surface of the operating plate (343) facing the bracket (3) is provided with an operating hole (3431) in the shape of a vertical waist hole; the end surface of the side plate (33) facing the operating plate (343) is provided with a circular hole (332) aligned with the operating hole (3431); the second bolt (344) is inserted into the circular hole (332) and the operating hole (3431); and the second bolt (344) is threadedly connected with a second nut (345).

9. A vacuum circuit breaker according to claim 8, characterized in that: The end surface of the side plate (33) away from the operating plate (343) is provided with a countersunk groove (331) communicating with the circular hole (332).

10. A vacuum circuit breaker according to claim 8, characterized in that: Two limit plates (346) are arranged on the end surface of the operating plate (343) facing the side plate (33); the two limit plates (346) are distributed in the vertical direction; and the bracket (3) is located between the two limit plates (346).

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