Isolating switch attached to pole-mounted circuit breaker

Abstract

The utility model relates to an isolating switch attached to a pole-mounted circuit breaker. The isolating switch comprises a circuit breaker assembly and an isolating switch assembly, the circuit breaker assembly comprises a base and a circuit breaker insulator. The isolating switch assembly comprises an isolating switch base, isolating switch insulators, a conductive arm, an operating shaft and an opening handle, the isolating switch insulators comprise a supporting insulator, a supporting insulator and an operating insulator, and the supporting insulator, the operating insulator and the supporting insulator are sequentially distributed beside the circuit breaker insulator; one side of the operation shaft is also connected with an opening handle; the top end of the supporting insulator is connected with an isolating switch base, a conductive block is further installed on the side, away from the circuit breaker insulator, of the isolating switch base, the top end of the supporting insulator is further connected with a contact matched with the conductive arm, one side of the conductive arm is hinged to the conductive block, and the other side of the conductive arm is hinged to the circuit breaker insulator. The other side of the conductive arm is driven by the operation insulator to swing up and down. The isolating switch provided by the utility model is simple in structure and light in weight, and can bear rated short-time withstand current together with a circuit breaker.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of disconnectors, in particular to a disconnector attached to a pole-mounted circuit breaker. BACKGROUND

[0002] In order to further deepen the standardization construction of distribution network, meet the development needs of pole-mounted circuit breaker products, and solve the problems of installation, maintenance and testing of the current pole-mounted circuit breaker, the disconnector used with the pole-mounted circuit breaker is redesigned, and the disconnector used with the pole-mounted circuit breaker is directly attached to the pole-mounted circuit breaker to form a whole with the circuit breaker.

[0003] The previous scheme and the scheme of the same trade are all designed, installed, maintained, etc. separately for the disconnector used with the pole-mounted circuit breaker, even if integrated with the pole-mounted circuit breaker, the performance of the disconnector used is often poor, the short-time withstand current performance cannot meet the national standard requirements, and the contact finger part is often ablated.

[0004] The previous scheme has the following disadvantages: the disconnector and the circuit breaker are installed separately, the volume is large, and the structure is relatively complex; the contact knife and the contact finger structure of the disconnector have defects, the short-time withstand current performance cannot meet the national standard requirements, and the contact finger part is easy to ablate; and the operating handle is not detachable. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to provide a disconnector attached to a pole-mounted circuit breaker, which has simple structure, light weight, and can withstand rated short-time withstand current with the circuit breaker.

[0006] In order to solve the above technical problems, the technical scheme of the utility model is as follows: a disconnector attached to a pole-mounted circuit breaker, the innovation point of which is that it comprises a circuit breaker assembly and a disconnector assembly.

[0007] The circuit breaker assembly comprises a base and a circuit breaker insulator vertically installed on the base.

[0008] The disconnector assembly comprises a disconnector base, a disconnector insulator, a conductive arm, an operating shaft and a disconnecting handle, the disconnector insulator comprises a support insulator, a support post insulator and an operating insulator, the support insulator, the operating insulator and the support post insulator are distributed in turn beside the circuit breaker insulator, wherein the support insulator is vertically arranged on the base, the support post insulator is obliquely arranged on the base, the operating insulator is installed on the base through the cooperation of the operating shaft, one side of the operating shaft is further connected with the disconnecting handle, and the operating shaft rotates under the drive of the disconnecting handle, thereby driving the operating insulator to swing up and down.

[0009] The top end of the support insulator is connected with a disconnecting switch base, and a conductive block is further installed on the side of the disconnecting switch base away from the circuit breaker insulator; the top end of the support insulator is further connected with a contact cooperating with the conductive arm, one side of the conductive arm is hinged to the conductive block, and the other side of the conductive arm swings up and down under the drive of the operating insulator, thereby cooperating with the contact to realize opening and closing.

[0010] Further, the conductive arm comprises a pair of parallel conductive plates, one side of the two conductive plates is connected to the conductive block through the cooperation of the first bolt and the first nut, and the other side is connected through the cooperation of the second bolt and the second nut, a through hole for the second bolt to pass through is formed on the conductive plate, the size of the section of the second bolt between the two conductive plates is greater than the size of the through hole on the conductive plate, and a plurality of deformation joints are formed on the conductive plate, and at least one deformation joint is in communication with the through hole, and the deformation joint is located at the contact position of the conductive plate and the contact.

[0011] Further, the first bolt and the second bolt are further sleeved with a contact spring, one side of the contact spring abuts against the outer wall of the conductive plate, and the other side abuts against the head of the first bolt or the second bolt.

[0012] Further, the connection between the operating shaft, the operating insulator and the base is that the operating shaft is movably installed on the base through the cooperation of the bearing and the bearing seat, the bottom end of the operating insulator is connected to the operating shaft through the cooperation of the toggle arm, one side of the toggle arm is fixedly connected to the operating shaft and moves with the rotation of the operating shaft, and the other side of the toggle arm is hinged to the operating insulator and drives the operating insulator to swing up and down.

[0013] Further, a retaining spring is further arranged between the operating shaft and the base, one side of the retaining spring is connected to the base, and the other side is connected to the operating shaft.

[0014] The disconnecting switch has the advantages that the disconnecting switch has a simple structure and light weight, can bear the rated short-time withstand current together with the circuit breaker, solves the problems of inconvenient installation, maintenance and test of the circuit breaker on the 12-24kV overhead line column, improves the integration of the circuit breaker on the column, and improves the performance of the disconnecting switch.

[0015] The conductive arm is used to cooperate with the contact to realize opening and closing, the traditional contact finger structure is removed, the structure is novel, and in cooperation with the deformation joint on the conductive plate, the conductive plate realizes segmented contact of multiple contact surfaces when contacting the contact, the stability of the connection is improved, and the ablation phenomenon caused by the virtual connection between the conductive arm and the contact is avoided.

[0016] The design of the contact spring on the first bolt and the second bolt is that the conductive plate can be pressed on the conductive block, the stability of the electrical contact is improved, and the ablation phenomenon caused by the virtual connection between the conductive arm and the conductive block is avoided.

[0017] The design of the holding spring is to assist the isolating switch to be kept in the closed or open position. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the isolating switch attached to the pole-mounted circuit breaker.

[0019] Figure 2 It is a schematic view of the isolating switch assembly in the utility model.

[0020] Figure 3 It is a schematic view of the isolating switch assembly in the utility model from another angle.

[0021] Figure 4 It is a schematic view of the conducting arm in the utility model.

[0022] Figure 5 It is a schematic view of the cooperation between the conducting arm and the contact in the utility model. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific implementation, structure, features and effects of the utility model will be described in detail below in combination with the drawings and preferred embodiments.

[0024] As shown in the utility model, an isolating switch attached to a pole-mounted circuit breaker comprises a circuit breaker assembly and an isolating switch assembly. Figures 1-5

[0025] The circuit breaker assembly comprises a base 4 and circuit breaker insulators 2 vertically installed on the base 4. There are three circuit breaker insulators 2 distributed side by side on the base 4. The distribution direction of the circuit breaker insulators 2 is the first direction, and the horizontal direction perpendicular to the first direction is the second direction.

[0026] The isolating switch assembly comprises an isolating switch base 1, isolating switch insulators, a conducting arm 7, an operating shaft 10 and an opening handle 3. The isolating switch insulators comprise support insulators 15, support column insulators 9 and operating insulators 5. The support insulators 15, operating insulators 5 and support column insulators 9 are distributed side by side along the second direction beside the circuit breaker insulators 2. There are three support insulators 15, operating insulators 5 and support column insulators 9, which correspond to the circuit breaker insulators 2 one by one. Among them, the support column insulators 9 are directly vertically installed on the base 4, the support column insulators 9 are obliquely arranged on the base 4, and the oblique direction of the support column insulators 9 is gradually inclined to the side away from the operating insulators 5 from bottom to top, and the operating insulators 5 are installed on the base 4 through the cooperation of the operating shaft 10.

[0027] ​The connection between the operating shaft 10, the operating insulator 5 and the base 4 is that the operating shaft 10 extends along the first direction, and the two sides of the operating shaft 10 are movably mounted on the base 4 through the cooperation of bearings and bearing seats, and the two sides of the operating shaft 10 respectively extend out of the base 4 from the two sides of the base 4, the bottom end of the operating insulator 5 is connected with the operating shaft through the cooperation of a toggle, one side of the toggle is fixedly connected with the operating shaft 10, and the toggle moves with the rotation of the operating shaft 10, the other side of the toggle is hingedly connected with the bottom end of the operating insulator 5 and drives the operating insulator 5 to swing up and down.

[0028] A retaining spring 11 is further arranged between the operating shaft 10 and the base 4, and the retaining spring 11 has two sides, which are respectively located on the two sides of the operating shaft 10 in the long axis direction, one side of the retaining spring 11 is connected with the base 4, the other side of the retaining spring 11 is connected with the operating shaft 10, and a toggle for mounting the retaining spring 11 is further arranged on the operating shaft 10. The design of the retaining spring 11 is to assist the isolation switch to be kept in the closed or open position.

[0029] The operating shaft 10 is further connected with an opening handle 3, and the operating shaft 10 rotates under the drive of the opening handle 3, and in turn drives the operating insulator 5 to swing up and down. In the embodiment, the opening handle 3 is connected with the operating shaft 10 through the cooperation of a bolt and a nut, so as to realize the detachable connection of the opening handle 3, so that the two sides of the operating shaft 10 can be operated according to different installation modes.

[0030] The isolation switch base 1 is connected with the top end of the supporting insulator 15, and the isolation switch base 1 is supported and fixed through the cooperation of the three supporting insulators 15, and the conducting blocks 6 are further arranged on the side of the isolation switch base 1 away from the circuit breaker insulator 2, and the conducting blocks 6 are three in total and are distributed along the first direction on the side of the isolation switch base 1, the contact 8 cooperating with the conducting arm 7 is further connected with the top end of each supporting insulator 9, one side of the conducting arm 7 is hingedly connected with the conducting block 6, and the other side of the conducting arm 7 swings up and down under the drive of the operating insulator 5, and in turn cooperates with the contact 8 to realize the opening and closing of the switch, the top end of the operating insulator 5 is hingedly connected with the conducting arm 7, and the operating insulator 5 drives the conducting arm 7 to swing up and down along the hinge joint between the conducting arm 7 and the conducting block 6 through the up and down swinging of the operating insulator 5, so as to realize the opening and closing of the conducting arm 7 and the contact 8.

[0031] The conducting arm 7 comprises a pair of parallelly distributed conducting plates, the conducting plates are rectangular plates, one side of the two conducting plates is connected with the conducting block 6 through the cooperation of the first bolt 14 and the first nut, and the conducting plates and the conducting block 6 are further provided with through holes through which the first bolt 14 passes, and the first bolt 14 is locked by the first nut after sequentially passing through the through holes of the conducting plates and the conducting block 6, so as to realize the hinge connection between the conducting arm 7 and the conducting block 6.

[0032] The other side of the two conductive plates is connected by the cooperation of the second bolt and the second nut, the second bolt has two in total and is distributed in an up-down position on the conductive plate, a through hole for the second bolt to pass through is formed on the conductive plate, the size of the section of the second bolt between the two conductive plates is greater than the size of the through hole on the conductive plate, a plurality of deformation joints 15 are formed on the conductive plate, one side of the deformation joint 15 extends to the end of the conductive plate, at least one deformation joint is in communication with the through hole, and the deformation joint 15 is located at the contact position of the conductive plate and the contact 8. The conductive arm is used to cooperate with the contact 8 to realize opening and closing, and the traditional contact finger structure is removed, so that the structure is novel, and in cooperation with the deformation joint 15 on the conductive plate, when the conductive plate is in contact with the contact 8, segmented contact of multiple contact surfaces is realized, the stability of the connection is beneficial, and the virtual connection between the conductive arm 7 and the contact 8 is avoided to cause the ablation phenomenon.

[0033] The contact spring 12 is sleeved on the first bolt 14 and the second bolt, one side of the contact spring 12 abuts against the outer wall of the conductive plate, and the other side of the contact spring 12 abuts against the head of the first bolt 14 or the second bolt. The design of the contact spring 12 on the first bolt 14 and the second bolt is that when the conductive arm 7 is connected with the conductive block 6, the conductive plate can be pressed on the conductive block 6, the stability of the electrical contact is beneficial, and the virtual connection between the conductive arm 7 and the conductive block 6 is avoided to cause the ablation phenomenon.

[0034] The disconnector is assembled with the pole-mounted circuit breaker, after the circuit breaker is disconnected, the disconnector is opened, a visible fracture is formed, relevant equipment of a line downstream of the disconnector can be overhauled, and an overhaul worker can be protected.

[0035] The disconnector attached to the pole-mounted circuit breaker is beautiful in appearance, light in weight and simple in structure, and after being assembled with the circuit breaker, the disconnector has the advantages of the traditional disconnector, that is, simple structure, light weight, and being able to withstand rated short-time withstand current with the circuit breaker, solving the problems of inconvenient installation, overhaul and test of the 12-24kV overhead line pole-mounted circuit breaker, improving the integration of the pole-mounted circuit breaker and improving the performance of the disconnector.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has been disclosed as above with a preferred embodiment, however, it is not used to limit the utility model, any person skilled in the art can make some changes or modifications to the above-mentioned disclosed technical content to obtain equivalent embodiments with equivalent changes, as long as the changes or modifications do not deviate from the technical scheme of the utility model, and the changes or modifications are based on the technical essence of the utility model, and the changes or modifications are equivalent to the above-mentioned embodiments, and still belong to the scope of the technical scheme of the utility model.

Claims

1. A disconnector for attachment to a pole-mounted circuit breaker, characterized by: The circuit breaker assembly and the disconnector assembly are provided. The circuit breaker assembly comprises a base and a circuit breaker insulator vertically installed on the base. The disconnector assembly comprises a disconnector base, a disconnector insulator, a conductive arm, an operating shaft and a disconnecting handle. The disconnector base is connected to the top end of the support insulator.

2. The disconnector attached to a pole-mounted circuit breaker according to claim 1, characterized in that: The conductive arm is hinged to the conductive block on one side and swings up and down under the drive of the operating insulator on the other side, thereby cooperating with the contact to realize opening and closing.

3. The disconnector attached to a pole-mounted circuit breaker according to claim 2, characterized in that: The conductive arm comprises a pair of parallel conductive plates.

4. The disconnector attached to a pole-mounted circuit breaker according to claim 1, characterized in that: The first bolt and the second bolt are further sleeved with a contact spring.

5. The disconnector attached to a pole-mounted circuit breaker according to claim 4, characterized in that: The operating shaft, the operating insulator and the base are connected by bearings and bearing seats. The operating shaft and the base are further provided with a retaining spring.

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