Fully-sealed pole-mounted circuit breaker with external disconnecting switch

Abstract

According to the fully-sealed pole-mounted circuit breaker with the external disconnecting switch, on the basis that an original lower box body is not changed, the disconnecting switch on the upper portion is set to be open, an isolating main shaft and an isolating crank arm rotationally connected with the isolating main shaft are arranged in the lower box body, and an isolating operation handle for controlling the isolating main shaft to rotate is correspondingly arranged on the isolating main shaft in a matched mode. A supporting column on the lower box body is hinged to a flexible connecting rod of the moving contact assembly, an isolation connecting lever is hinged to an insulation connecting lever of the moving contact assembly through a pull rod, and a telescopic sleeve is arranged on the pull rod in a sleeving mode, so that on the basis of insulation sealing, it is guaranteed that a fracture is delicious, and the habits of electric power operators are better met.

Description

Technical Field

[0001] The utility model belongs to the field of electrical technology, and particularly relates to a fully sealed column-mounted circuit breaker with an external isolating switch. Background Art

[0002] When the isolating switch and the circuit breaker are configured as two devices, they are installed on the poles separately, which takes up a lot of space and has many and messy wiring. In addition, the circuit breaker terminals, the isolating switch terminals and the blade are completely exposed to the air, which are easily affected by the environment, causing corrosion and inconvenient operation. In addition, short circuits are easily formed by falling debris or branches overlapping the exposed conductive parts, including frequent power outages caused by various foreign objects, which affect people's production and life.

[0003] When the isolating switch and the circuit breaker are integrated, they are installed on the pole as a device, but the circuit breaker terminals, the isolating switch terminals and the blade are still completely exposed to the air, which are easily affected by the environment, resulting in corrosion, inconvenient operation and other problems. In addition, falling debris or branches overlapping the exposed conductive parts are prone to short circuit problems, including frequent power outages caused by various foreign objects, which affect people's production and life.

[0004] The utility model with announcement number CN216562924U discloses a column-box type high-voltage switch, the key points of its technical solution include an upper column shell, a lower box shell and an intermediate fixing plate made of insulating material, a high-voltage passage component is arranged in the upper column shell, a low-voltage control component is arranged in the lower box shell, and the intermediate fixing plate is used to fix the upper column shell and the lower box shell; its high-voltage passage components are all sealed in the upper column shell, and the isolation of high and low pressure is achieved by the upper column shell and the lower box shell, but the overall sealing, the fracture is not visible, and the operational safety needs to be improved. Summary of the invention

[0005] The purpose of the utility model is to address the deficiencies of the above-mentioned prior art and to provide a fully sealed column mounted circuit breaker with an external isolating switch, in which the circuit breaker and the isolating switch are installed together to reduce the installation space, and the isolating switch and the circuit breaker are sealed to avoid exposure and pollution.

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

[0007] A fully sealed column-mounted circuit breaker with an external isolating switch, comprising a lower box body and an integrated pole arranged above the lower box body and a fully sealed isolating switch structure, wherein an isolating main shaft and an isolating crank arm rotatably connected thereto are arranged in the lower box body, and an isolating main shaft is correspondingly provided with an isolating operating handle for controlling its rotation;

[0008] The isolating switch structure includes a moving contact assembly, a stationary contact assembly, and a support column and a telescopic sleeve fixed on the lower box body. The upper end of the support column is hinged to the soft connecting rod of the moving contact assembly, and the isolating crank arm is hinged to the insulating crank arm of the moving contact assembly through a pull rod, and the telescopic sleeve is sleeved on the pull rod.

[0009] When the isolation operating handle is turned to the "open" position, the isolation operating handle synchronously drives the isolation main shaft and the isolation crank arm to rotate, pushes the pull rod upward and drives the insulating crank arm to rotate, and the moving contact assembly is separated from the static contact assembly and is in the open state;

[0010] When the isolation operating handle is turned to the "closed" position, the isolation operating handle synchronously drives the isolation main shaft and the isolation crank arm to rotate, pushes the pull rod downward and drives the insulating crank arm to rotate, and the moving contact assembly is engaged with the static contact assembly and is in the closed state.

[0011] The moving contact assembly also includes a moving contact and a first insulating seal body correspondingly arranged on the outside, and a flexible connecting rod and an insulating crooked arm are fixedly arranged on the moving contact at intervals and in the first insulating seal body;

[0012] The stationary contact assembly comprises a flat 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.

[0013] The end conductive member of the moving contact is connected to the incoming line terminal, and the conductive member and the incoming line terminal are both covered with a sealing bellows;

[0014] 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 a sealing bellows is correspondingly covered on the outlet terminal.

[0015] The sealing bellows comprises a horizontal portion fitted with the cable and a bellows expansion portion for sealing, and the wiring terminals at the inlet and outlet ends are also provided with a fixing portion for fixing the bellows expansion portion, and the bellows expansion portion is sealed and connected to the fixing portion;

[0016] One end of the cable lug is connected to the cable, and the other end is detachably connected to the wiring terminal and both are arranged in the corrugated expansion part.

[0017] The corrugated expansion part is an elastic part and is arranged with different diameters in the axial direction.

[0018] The support column is configured as a hollow structure.

[0019] The telescopic sleeve is also configured as a sealing bellows.

[0020] The beneficial effects of the utility model are:

[0021] (1) The fully sealed column-mounted circuit breaker with an external isolating switch is designed to be open-type on the basis of keeping the original lower box unchanged. An isolating main shaft and an isolating crank arm rotatably connected thereto are provided in the lower box. An isolating operating handle for controlling its rotation is provided on the isolating main shaft. The supporting column on the lower box is hinged to the flexible connecting rod of the moving contact assembly, and the isolating crank arm is hinged to the insulating crank arm of the moving contact assembly through a pull rod. The telescopic sleeve is provided on the pull rod. On the basis of insulation and sealing, the break is ensured to be smooth, which is more in line with the habits of power operators.

[0022] (2) After the isolating switch is closed, the conductive part adopts a fully sealed design, which reduces the risk of equipment malfunction caused by the external environment.

[0023] (3) The isolation electric mechanism, isolation spindle and other related components are in the shell of the lower box. 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, ensuring the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model in the closed state;

[0025] Figure 2 yes Figure 1 A cross-sectional view of

[0026] Figure 3 It is a partial stereogram of the utility model in the closed state;

[0027] Figure 4 It is a structural schematic diagram of the utility model in the open state;

[0028] Figure 5 It is a structural schematic diagram of the moving contact assembly;

[0029] Figure 6 It is a schematic diagram of the structure of the static contact assembly;

[0030] Figure 7 It is a partial cross-sectional view of the disconnector structure in the closed state. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0033] The utility model provides a fully sealed column mounted circuit breaker with an external isolating switch, such as Figures 1 to 7 shown.

[0034] A fully sealed column-mounted circuit breaker with an external isolating switch comprises a lower box body, an integrated pole 9 arranged above the lower box body, and a fully sealed isolating switch structure, wherein an isolating main shaft 11 and an isolating crank arm 12 rotatably connected thereto are provided in the lower box body, and an isolating operating handle 1 for controlling its rotation is correspondingly provided on the isolating main shaft 11; and the isolating switch structure comprises a moving contact assembly 6, a stationary contact assembly 8, and a support column 2 and a telescopic sleeve 4 fixedly arranged on the lower box body, wherein the upper end of the support column 2 is hinged to the soft connecting rod 61 of the moving contact assembly 6, and the isolating crank arm is hinged to the insulating crank arm 7 of the moving contact assembly through a pull rod 5, and the telescopic sleeve 4 is sleeved on the pull rod 5.

[0035] When the isolation operating handle 1 is turned to the "off" position, the isolation operating handle 1 synchronously drives the isolation main shaft 11 and the isolation crank arm 12 to rotate, pushes the pull rod 5 upward and drives the insulating crank arm 7 to rotate, and the moving contact assembly is separated from the static contact assembly and is in the open state.

[0036] When the isolation operating handle 1 is turned to the "closed" position, the isolation operating handle 1 synchronously drives the isolation main shaft 11 and the isolation crank arm 12 to rotate, pushes the pull rod 5 downward and drives the insulating crank arm 7 to rotate, and the moving contact assembly is engaged with the static contact assembly and is in the closed state.

[0037] The moving contact assembly further comprises a moving contact 62 and a first insulating seal 63 correspondingly arranged on the outside. The flexible connecting rod 61 and the insulating crooked arm 7 are fixedly arranged on the moving contact 62 at intervals and disposed in the first insulating seal 63 .

[0038] The stationary contact assembly 8 includes a flat contact 82, a conductor 83 fixed thereto, and a second insulating sealing body 81 correspondingly covered on the outside, and the first insulating sealing body 63 is located inside the second insulating sealing body 81 and is sealed in multiple layers through a sealing ring 64 arranged on the outer end surface and a sealing plug 65 protruding from the side edge.

[0039] The terminal conductive part of the moving contact is connected to the incoming terminal 3, and the conductive part and the incoming terminal are both covered with a sealing bellows 31; the flat contact 82 of the static contact assembly 8 is connected to the integrated pole 9 through a connecting row and leads to the outgoing terminal 10, and the outgoing terminal 10 is correspondingly covered with a sealing bellows 31.

[0040] In this embodiment, the sealing bellows 31 includes a horizontal portion fitted with the cable 311 and a bellows expansion portion for sealing, and the wiring terminals 314 at the inlet and outlet terminals are also provided with a fixing portion 315 for fixing the bellows expansion portion, and the bellows expansion portion is sealed and connected to the fixing portion 315; one end of the cable lug 312 is connected to the cable 311, and the other end is detachably connected to the wiring terminal 314 and both are arranged in the bellows expansion portion; preferably, the bellows expansion portion is an elastic member and is arranged in unequal diameters along the axial direction. The expansion sleeve sleeved outside the pull rod 5 is also set as a sealing bellows to play a sealing role.

[0041] The support column 2 is configured as a hollow structure, and a voltage sensor or a capacitor power module can be encapsulated therein according to configuration requirements, so that the product has more functions.

[0042] The fully sealed column mounted circuit breaker with external isolating switch is 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 fracture is visible. Figure 3 As shown, it is more in line with the habits of power operators, and the isolation motor mechanism, 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, ensuring the service life of the product; and after the external isolating switch is closed, the conductive part adopts a fully sealed design through the first insulating seal and the second insulating seal, reducing equipment malfunctions caused by the external environment.

[0043] 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.

[0044] 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.

[0045] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "left", "right", "center", etc. indicate directions or positional relationships 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 fully sealed column mounted circuit breaker with an external isolating switch, characterized in that: It includes a lower box body and an integrated pole arranged above the lower box body and a fully sealed isolating switch structure, and the lower box body is provided with an isolating main shaft and an isolating crank arm rotatably connected thereto, and the isolating main shaft is correspondingly provided with an isolating operating handle for controlling its rotation; The isolating switch structure includes a moving contact assembly, a stationary contact assembly, and a support column and a telescopic sleeve fixed on the lower box body. The upper end of the support column is hinged to the soft connecting rod of the moving contact assembly, and the isolating crank arm is hinged to the insulating crank arm of the moving contact assembly through a pull rod, and the telescopic sleeve is sleeved on the pull rod. When the isolation operating handle is turned to the "off" position, the isolation operating handle synchronously drives the isolation main shaft and the isolation crank arm to rotate, pushes the pull rod upward and drives the insulating crank arm to rotate, and the moving contact assembly is separated from the static contact assembly and is in the off state; When the isolation operating handle is turned to the "closed" position, the isolation operating handle synchronously drives the isolation main shaft and the isolation crank arm to rotate, pushes the pull rod downward and drives the insulating crank arm to rotate, and the moving contact assembly is engaged with the static contact assembly and is in the closed state.

2. A fully sealed column mounted circuit breaker with an external isolating switch according to claim 1, characterized in that: The moving contact assembly also includes a moving contact and a first insulating seal body correspondingly arranged on the outside, and a flexible connecting rod and an insulating crooked arm are fixedly arranged on the moving contact at intervals and in the first insulating seal body; The stationary contact assembly comprises a flat 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.

3. A fully sealed column mounted circuit breaker with an external isolating switch according to claim 1, characterized in that: The end conductive member of the moving contact is connected to the incoming line terminal, and the conductive member and the incoming line terminal are both covered with a sealing bellows; 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 a sealing bellows is correspondingly covered on the outlet terminal.

4. A fully sealed column mounted circuit breaker with an external isolating switch according to claim 3, characterized in that: The sealing bellows comprises a horizontal portion fitted with the cable and a bellows expansion portion for sealing, and the wiring terminals at the inlet and outlet ends are also provided with a fixing portion for fixing the bellows expansion portion, and the bellows expansion portion is sealed and connected to the fixing portion; One end of the cable lug is connected to the cable, and the other end is detachably connected to the wiring terminal and both are arranged in the corrugated expansion part.

5. A fully sealed column mounted circuit breaker with an external isolating switch according to claim 4, characterized in that: The corrugated expansion part is an elastic part and is arranged with different diameters in the axial direction.

6. A fully sealed column mounted circuit breaker with an external isolating switch according to claim 1, characterized in that: The support column is configured as a hollow structure.

7. A fully sealed column mounted circuit breaker with an external isolating switch according to claim 4, characterized in that: The telescopic sleeve is also configured as a sealing bellows.

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