Isolation knife switch for pole-mounted circuit breaker

Abstract

The utility model discloses an isolating knife switch for a pole-mounted circuit breaker, which comprises a base provided with an insulating part and an insulating support. An isolation blade is rotationally mounted on the insulating part, and the other end of the isolation blade is in contact with or separated from an insulating support column arranged on the base through rotation of the isolation blade on the insulating part; the base is further provided with a driving shaft, and the isolation blade is driven to rotate on the insulating part through the driving shaft. The insulating pillar comprises an insulating pillar, and one end of the insulating pillar is provided with a connecting hole. The other end of the insulation column is provided with an isolation contact wiring terminal, and the movement of the isolation contact wiring terminal is limited through a positioning plate. On the basis, reliable opening and closing actions are achieved, meanwhile, the torsion resistance of the insulation supporting column can be improved, particularly, the position of the isolation contact wiring terminal is limited through the positioning plate, and it is guaranteed that the isolation contact wiring terminal cannot be twisted and dislocated no matter whether wind blows or external force factors exist after the isolation switch is installed and used.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an isolating knife switch for a pole-mounted circuit breaker. Background Art

[0002] In the dynamic thermal stability test, there are strict requirements on the stability after the insulating support is connected to the base, that is, the insulating support has reliable torque resistance after installation. At the same time, there are also strict requirements on the isolation contact terminals, that is: the isolation contact terminals must not shake during the horizontal and vertical pull tests. Utility Model Content

[0003] The utility model aims to provide an isolating knife switch for a pole-mounted circuit breaker to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an isolating knife switch for a pole-mounted circuit breaker, comprising a base, on which an insulating member and an insulating pillar are provided; and an isolating blade is rotatably mounted on the insulating member; the base is also provided with a driving shaft and a handle mounted on the driving shaft, and the isolating blade is caused to rotate on the insulating member through the driving shaft so that the other end of the isolating blade is in contact with or separated from the insulating pillar; the insulating pillar comprises an insulating pillar, and one end of the insulating pillar is provided with a plurality of connecting holes, and the insulating pillar is fixed to the base by fasteners passing through the connecting holes; the other end of the insulating pillar is also provided with a positioning plate, and an isolating contact terminal is mounted on the positioning plate.

[0005] As a preferred technical solution of the utility model: one end of the driving shaft passes through the base and is connected to a first connecting portion, and the other end of the driving shaft passes through the base and is connected to a second connecting portion.

[0006] As a preferred technical solution of the present utility model: the handle is connected to the first connection part or the second connection part through a third connection part.

[0007] As a preferred technical solution of the present utility model: an isolation interlocking plate is further provided between the second connecting portion and the base, and the isolation interlocking plate is linked with the driving shaft.

[0008] As a preferred technical solution of the utility model: the isolation blade includes a first blade and a second blade, and the first blade and the second blade are connected by a connecting piece.

[0009] As a preferred technical solution of the utility model: the connecting member includes a screw rod, and the screw rod passes through the second blade and is adaptively connected with a nut.

[0010] As a preferred technical solution of the present utility model: a spring is further provided on the screw; wherein, one end of the spring contacts the screw, and the other end of the spring contacts the outer wall surface of the first blade.

[0011] By adopting the above technical solution, the beneficial effects of the present utility model are as follows: since a plurality of connection holes are provided on the base, the stability of the connection between the insulating post and the base can be improved by increasing the number of connection holes, thereby enabling the device to improve the torsional resistance of the insulating post while realizing reliable opening and closing operations; at the same time, the position of the isolating contact terminal is restricted by the positioning plate, ensuring that the isolating contact terminal will not be twisted and displaced whether in windy conditions or under external force factors after the isolating switch is installed and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is an exploded structural schematic diagram of one side of the main body structure of the present utility model;

[0013] Figure 2 is Figure 1 a partial enlarged schematic diagram at A in

[0014] Figure 3 is an exploded schematic diagram of the other side of the main body structure of the present utility model;

[0015] Figure 4 is Figure 3 a partial enlarged schematic diagram at B in

[0016] Figure 5 is a schematic diagram of one side of the insulating post of the present utility model after disassembly;

[0017] Figure 6 is a schematic diagram of the other side of the insulating post of the present utility model after disassembly;

[0018] Figure 7 is a partial exploded structural schematic diagram of the isolating blade of the present utility model.

[0019] In the figure: 1, base; 2, insulating post; 20, insulating column; 21, connection hole; 22, positioning plate; 23, isolating contact terminal; 3, isolating blade; 30, first blade; 31, connecting piece; 32, screw; 33, spring; 34, nut; 35, second blade; 4, handle; 5, insulating member; 6, driving shaft; 7, third connecting portion; 8, first connecting portion; 9, isolating interlock plate; 10, second connecting portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0021] Please refer to Figure 1-7 , an embodiment provided by the present utility model: an isolating switch for a pole-mounted circuit breaker, including a base 1, an insulating member 5 and an insulating pillar 2 are provided on the base 1; an isolating blade 3 is rotatably installed on the insulating member 5; a driving shaft 6 and a handle 4 installed on the driving shaft 6 are further provided on the base 1, and the driving shaft 6 is used to cause the isolating blade 3 to rotate on the insulating member 5, so that the other end of the isolating blade 3 contacts or separates from the insulating pillar 2; the insulating pillar 2 includes an insulating column 20, and a plurality of connection holes 21 are provided at one end of the insulating column 20, and the insulating column 20 is fixed to the base 1 by passing fasteners through the connection holes 21; a positioning plate 22 is further provided at the other end of the insulating column 20, and an isolating contact terminal 23 is installed on the positioning plate 22.

[0022] In summary, since a plurality of connection holes 21 are provided on the base 1, the stability of the connection between the insulating pillar 2 and the base 1 can be improved by increasing the number of connection holes 21, so that the device can not only achieve reliable opening and closing actions, but also improve the torsional resistance of the insulating pillar 2; at the same time, the position of the isolating contact terminal 23 is restricted by the positioning plate 22, ensuring that the isolating contact terminal 23 will not be twisted and misaligned whether it is windy or affected by external force factors after the isolating switch is installed and used.

[0023] Furthermore, since one end of the driving shaft 6 passes through the base 1 and is connected to a first connection portion 8, and the other end of the driving shaft 6 passes through the base 1 and is connected to a second connection portion 10 provided, therefore, through the settings of the first connection portion 8 and the second connection portion 10, it is convenient to connect the driving shaft 6 to an external driving member.

[0024] Specifically, the handle 4 is connected to the first connection portion 8 or the second connection portion 10 through a third connection portion 7 provided.

[0025] In summary, the handle 4 can be connected to the first connecting portion 8 or the second connecting portion 10 through the third connecting portion 7, so that the installation position of the handle 4 can be freely adjusted; among them, the first connecting portion 8, the second connecting portion 10 and the third connecting portion 7 are preferably flanges.

[0026] Based on this, it is convenient for the handle 4 to be installed in any direction during the later installation of the circuit breaker. If the position of the handle is incorrect, the handle can be disassembled or the flange disc can be rotated to change the direction and angle, which is beneficial to the operation of the isolating switch during use and the general performance of the product's on-site installation position. In addition, the handle 4 is set in a V shape, so it is more labor-saving during opening and closing operations, reducing the input of driving force.

[0027] Furthermore, since an isolating interlock plate 9 is provided between the second connecting portion 10 and the base 1, and the isolating interlock plate 9 is linked with the drive shaft 6.

[0028] The position of the isolating interlock plate 9 is optimized. The original isolating interlock driven by one end of the drive shaft 6 is changed to be in the middle of the drive shaft 6 and the second connecting portion 10; this can improve the reliability and stability of the mechanical interlock of the isolating switch and the mechanical anti-misoperation of the circuit breaker body, as well as the reliability of the mechanical life operation times. At the same time, it can also adapt to current transformers of different sizes.

[0029] On the basis of the above solution, since the isolating blade 3 includes a first blade 30 and a second blade 35, and the first blade 30 and the second blade 35 are connected by a provided connecting member 31, therefore, the assembly of the two blades can be completed through the connecting member 31, and at the same time, the connecting member 31 can be used to make the opposite surfaces of the two blades reliably fit with the isolating contact terminal 23.

[0030] Specifically, the connecting member 31 includes a screw 32, and the screw 32 passes through the second blade 35 and is adaptively connected to a provided nut 34.

[0031] Further, a spring 33 is also provided on the screw 32; wherein, one end of the spring 33 contacts the screw 32, and the other end of the spring 33 contacts the outer wall surface of the first blade 30.

[0032] In summary, through the setting of the spring 33, the two blades can be reliably attached to the left and right sides of the isolating contact terminal 23; ensuring the stable reliability of the contact point pressure value. Further, the number of the connecting members 31 is three; one is used to install the isolating blade 3 on the insulating member 5, and the other two connecting members 31 are installed on both sides of the isolating contact terminal 23.

[0033] The embodiments of the present utility model have been described in detail in conjunction with the accompanying drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. An isolating switch for a pole-mounted circuit breaker, characterized in that: It comprises a base (1), on which an insulating member (5) and an insulating support (2) are provided; and an isolating blade (3) is rotatably mounted on the insulating member (5); The base (1) is also provided with a driving shaft (6) and a handle (4) mounted on the driving shaft (6), and the driving shaft (6) causes the isolation blade (3) to rotate on the insulating member (5) so that the other end of the isolation blade (3) contacts or separates from the insulating support (2); The insulating support column (2) comprises an insulating column (20), and one end of the insulating column (20) is provided with a plurality of connection holes (21), and the insulating column (20) is fixed to the base (1) by fasteners passing through the connection holes (21); A positioning plate (22) is also provided at the other end of the insulating column (20), and an isolation contact terminal (23) is mounted on the positioning plate (22).

2. The isolating switch for a pole-mounted circuit breaker according to claim 1, characterized in that: One end of the drive shaft (6) passes through the base (1) and is connected to a first connection portion (8), and the other end of the drive shaft (6) passes through the base (1) and is connected to a second connection portion (10).

3. The isolating switch for a pole-mounted circuit breaker according to claim 2, characterized in that: The handle (4) is connected to the first connection part (8) or to the second connection part (10) via a third connection part (7).

4. The isolating switch for a pole-mounted circuit breaker according to claim 3, characterized in that: An isolation interlocking plate (9) is also provided between the second connecting portion (10) and the base (1), and the isolation interlocking plate (9) moves in tandem with the driving shaft (6).

5. The isolating switch for a pole-mounted circuit breaker according to any one of claims 1 to 4, characterized in that: The isolation blade (3) comprises a first blade (30) and a second blade (35), and the first blade (30) and the second blade (35) are connected via a connecting piece (31).

6. The isolating switch for a pole-mounted circuit breaker according to claim 5, characterized in that: The connecting member (31) comprises a screw rod (32), and the screw rod (32) is adapted to be connected with a nut (34) after passing through the second blade (35).

7. The isolating switch for a pole-mounted circuit breaker according to claim 6, characterized in that: A spring (33) is also provided on the screw rod (32); wherein one end of the spring (33) is in contact with the screw rod (32), and the other end of the spring (33) is in contact with the outer wall surface of the first blade (30).

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