Isolating switch contact sealing structure

Abstract

The utility model relates to a contact sealing structure of an isolating switch. A moving contact assembly comprises a moving contact, a flexible connecting rod, an insulating crank arm and a first insulating sealing body, wherein the flexible connecting rod and the insulating crank arm are fixedly arranged at an interval with the moving contact; the static contact assembly is arranged to be a static contact, a conductor piece fixedly connected with the static contact and a second insulation sealing body correspondingly arranged outside in a covering mode, the switch-on cut-in portion of the disconnecting switch is sealed, and the moving contact and the static contact are sealed through the first insulation sealing body and the second insulation sealing body. The first insulation sealing body is located in the second insulation sealing body and is sealed through the sealing ring arranged on the outer end face, and the situation that the conductor is polluted by the environment, and normal operation of a circuit is affected is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology, and particularly relates to a contact sealing structure of an isolating switch. Background Art

[0002] An isolating switch is a switching device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high requirements for working reliability, it has a great impact on the design, construction and safe operation of substations and power plants. The main feature of the isolating switch is that it has no arc extinguishing ability and can only open and close circuits without load current.

[0003] The traditional disconnector terminals and blades are completely exposed to the air, which are easily affected by the environment, resulting in corrosion, inconvenient operation, etc. In addition, falling debris or branches overlapping the exposed conductive parts can easily cause short circuits, including frequent power outages caused by various foreign objects, which affect people's production and life.

[0004] The utility model with announcement number CN212570819U discloses a sealed insulation structure of an outdoor disconnector, the key points of its technical solution include a fixed seat, a first insulating pillar and a second insulating pillar are fixedly connected on both sides of the top of the fixed seat, the tops of the first insulating pillar and the second insulating pillar are fixedly connected to a first contact and a second contact, and the tops of the first contact and the second contact are fixedly connected to a first elastic clip and a second elastic clip, respectively. It is mainly sealed by setting an outer frame on the outside of the whole, and the overall sealing still needs to be improved. Summary of the invention

[0005] The utility model aims to provide a contact sealing structure for an isolating switch to address the deficiencies of the prior art, and to seal the closing cut-in portion of the isolating switch to prevent the conductor from being polluted by the environment.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A contact sealing structure of an isolating switch comprises a moving contact assembly and a stationary contact assembly, wherein the moving contact assembly comprises a moving contact, a flexible connecting rod and an insulating crooked arm arranged at a fixed interval therewith, and a first insulating sealing body correspondingly arranged on the outside;

[0008] The stationary contact assembly comprises a stationary contact, a conductor member fixed thereto and a second insulating sealing body correspondingly covered on the outside, and the first insulating sealing body is located inside the second insulating sealing body and is sealed by a sealing ring arranged on the outer end surface.

[0009] The fixed contacts are designed as flat contacts.

[0010] The second insulating sealing body is a molded part and is installed integrally with the conductor part, while the static contact is detachably connected to the conductor part.

[0011] The flat contact of the static contact assembly is connected with the integrated pole through the connecting row and leads to the outlet terminal, and the second insulating seal is also correspondingly sealed and covered on the connecting row.

[0012] A protective cap is also fixedly provided on the top of the integrated pole.

[0013] The beneficial effects of the utility model are:

[0014] The contact sealing structure of the isolating switch is provided with a moving contact assembly as a moving contact, a flexible connecting rod and an insulating crooked arm arranged at a fixed interval therewith, and a first insulating sealing body correspondingly arranged on the outside; the stationary contact assembly is provided as a stationary contact, a conductor member fixedly connected therewith, and a second insulating sealing body correspondingly covered on the outside, so as to seal the closing cut-in part of the isolating switch, and the moving contact and the stationary contact are sealed by the first insulating sealing body and the second insulating sealing body, and the first insulating sealing body is located inside the second insulating sealing body and is sealed by a sealing ring arranged on the outer end surface, so as to prevent the conductor from being polluted by the environment and causing a situation affecting the normal operation of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 yes Figure 1 A cross-sectional view of

[0017] Figure 3 It is a structural schematic diagram of the static contact assembly;

[0018] Figure 4 It is a structural schematic diagram of the moving contact assembly. DETAILED DESCRIPTION

[0019] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0020] The utility model provides a contact sealing structure of an isolating switch, such as Figures 1 to 4 shown.

[0021] A contact sealing structure of an isolating switch includes a moving contact assembly 1 and a stationary contact assembly 2, wherein the moving contact assembly 1 includes a moving contact 11, a flexible connecting rod 14 and an insulating arm 13 arranged at a fixed interval therefrom, and a first insulating seal 12 correspondingly arranged on the outside; the stationary contact assembly includes a stationary contact 22, a conductor 23 fixed thereto, and a second insulating seal 21 correspondingly covered on the outside, and the first insulating seal 12 is located inside the second insulating seal 21 and is sealed by a sealing ring 121 arranged on the outer end surface, and a sealing plug 122 is also protruding from the side edge for further multi-layer sealing. In this embodiment, the stationary contact 22 is set as a flat contact.

[0022] The second insulating seal body 21 is a molded part and is installed as a whole with the conductor part 23, and the static contact 22 is detachably connected to the conductor part 23. The flat contact 22 of the static contact assembly is connected to the integrated pole through the connecting row 4 and leads to the outlet terminal. The second insulating seal body 21 is also correspondingly sealed on the connecting row 4, and a protective cap is also fixed to the top of the integrated pole.

[0023] The isolating switch contact sealing structure is used in conjunction with a fully sealed column-mounted circuit breaker with an external isolating switch. Based on an existing column box type high-voltage switch (publication number CN216562924U), the lower shell remains unchanged, and the upper isolating switch is open. On the basis of insulation sealing, the closing cut-in part of the isolating switch is sealed, and the moving contact 11 and the static contact 22 are sealed by the first insulating seal body 12 and the second insulating seal body 21. The first insulating seal body 12 is located inside the second insulating seal body 21 and is sealed by a sealing ring 121 arranged on the outer end surface, so as to prevent the conductor from being polluted by the environment and the occurrence of conditions that affect the normal operation of the circuit, and ensure that the fracture is visible. The isolation electric mechanism, the isolation spindle and other related components are in the lower shell, and the protection level of the lower shell reaches IP67. When the product is running outdoors, the inside of the shell is protected from environmental influences, thereby ensuring the service life of the product.

[0024] If the words "first", "second" and so on are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words have no special meaning.

[0025] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

[0026] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "left", "right", "center", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.

Claims

1. A contact sealing structure for an isolating switch, characterized in that: It comprises a moving contact assembly and a stationary contact assembly, wherein the moving contact assembly comprises a moving contact, a flexible connecting rod and an insulating crooked arm arranged at a fixed interval therewith, and a first insulating sealing body correspondingly arranged on the outside; The stationary contact assembly comprises a stationary contact, a conductor member fixed thereto and a second insulating sealing body correspondingly covered on the outside, and the first insulating sealing body is located inside the second insulating sealing body and is sealed by a sealing ring arranged on the outer end surface.

2. The contact sealing structure of an isolating switch according to claim 1, characterized in that: The fixed contacts are designed as flat contacts.

3. The contact sealing structure of an isolating switch according to claim 1, characterized in that: The second insulating sealing body is a molded part and is installed integrally with the conductor part, while the static contact is detachably connected to the conductor part.

4. A contact sealing structure for an isolating switch according to any one of claims 1 to 3, characterized in that: The flat contact of the static contact assembly is connected with the integrated pole through the connecting row and leads to the outlet terminal, and the second insulating seal is also correspondingly sealed and covered on the connecting row.

5. The contact sealing structure of an isolating switch according to claim 4, characterized in that: A protective cap is also fixedly provided on the top of the integrated pole.

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