CN219591313U - Isolation switch for voltage transformer of inflatable cabinet - Google Patents

Abstract

The utility model discloses an isolating switch for a voltage transformer of an inflatable cabinet, which comprises a switch body in the interior of the inflatable cabinet and an operating mechanism outside the air chamber, wherein the operating mechanism operates the switch body to realize the closing and grounding of the switch body, the switch body comprises a corrugated pipe assembly, a main shaft, a crank arm and an isolating rod, the transmission of the operating mechanism outside the inflatable cabinet and an isolating switch support is realized through the corrugated pipe assembly, the air cabinet external mechanism pulls a pull rod to drive the corrugated pipe assembly to linearly move, the crank arm drives the main shaft to rotate, so that the isolating rod is driven to move to realize the closing and grounding of the isolating switch, the transmission structure of the corrugated pipe assembly reduces transmission parts, enhances the reliability, enhances the sealing property of the connection between the moving parts and the air chamber, reduces the leakage rate, is not influenced by the inflation deformation of the inflatable cabinet and the violent operation of the operating mechanism, adapts to various severe environments, and has accurate limiting position and simple limiting operation.

Description

Isolation switch for voltage transformer of inflatable cabinet

Technical Field

The utility model relates to the technical field of power transmission and distribution inflatable switch cabinets, in particular to an isolating switch for a voltage transformer of an inflatable cabinet.

Background

The line side of the medium-voltage charging cabinet cable inlet and outlet cabinet is provided with a voltage transformer cabinet, and when the voltage transformer is replaced or maintained, the line side needs to be grounded. However, in special occasions, the voltage transformer needs to be replaced and maintained under the condition that the line side is not powered off, and at the moment, a small isolating switch is additionally arranged between a voltage transformer socket and a line side busbar and used for breaking the voltage transformer and grounding the transformer side.

For example, an isolating switch for a gas insulated high-voltage switchgear charging cabinet PT disclosed in patent document with publication number CN203690142U comprises a moving contact connected with a voltage transformer, a fixed contact connected with a main circuit bus, a grounding fixed contact and a discharging device, wherein the grounding fixed contact and the discharging device are fixedly arranged on a charging cabinet body after being connected, the moving contact is connected with a switching device, the moving contact is communicated with the fixed contact in a working state, and the moving contact is connected with the grounding fixed contact in a grounding discharging state. The switching device is a connecting rod type switching device. The utility model has simple structure, high safety and reliability and convenient processing and manufacturing, can use the common isolating switch to switch when working according to the characteristic of the voltage transformer (PT), mainly uses the translation of the connecting rod mechanism to realize the switching of the moving contact and the fixed contact, and realizes the rapid switching of the voltage transformer (PT) under the condition that the main circuit is not powered off, thereby being convenient for detection and maintenance.

Then, the connecting rod type structure of this scheme, when the charging box aerifys the deformation or operator's violent operation time structure unreliable, and the sealing of the connecting portion of gas tank is destroyed easily and is led to gas leakage inefficacy, does not also have limit structure simultaneously, has potential safety hazards such as maloperation. In the prior art, gear transmission is adopted, but the gear transmission has a plurality of parts, long transmission idle stroke and uneconomical cost.

Disclosure of Invention

Aiming at the problems that the prior art is suitable for violent operation and bad environment, is easy to leak air, has more transmission parts, unreliable transmission and lacks a limiting structure, the utility model provides an isolating switch for a voltage transformer of an inflatable cabinet, and solves the problems.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides an aerify cabinet isolator for voltage transformer, includes the inside switch body of air chamber and the outside operating device of air chamber, operating device operation switch body realizes the combined floodgate and the ground connection of switch body, the switch body includes bellows subassembly, main shaft, turning arm, barrier lever, bellows subassembly one end passes the air chamber wall and is connected with operating device, and the other end is connected with turning arm one end loose axle, the turning arm other end and main shaft rigid coupling, the rigid coupling has the barrier lever on the main shaft, the barrier lever passes through the annealed copper line and connects outer cone sleeve pipe and be connected with the outside voltage transformer of air chamber again, operating device drives bellows subassembly rectilinear motion, the bellows subassembly passes through turning arm drive main shaft rotation and realizes the barrier lever motion, the barrier lever moves to circuit side static contact position switch body combined floodgate, the barrier lever moves to ground connection static contact position switch body ground connection.

Preferably, the switch body further comprises a first bearing seat and a second bearing seat, and two ends of the main shaft are respectively arranged in bearings on the first bearing seat and the second bearing seat.

Preferably, the bellows subassembly includes bellows, action bars, flange and welds the ring, bellows, flange and weld the ring suit outside the action bars, flange sealing mounting is on the air chamber wall, weld the ring sealing welding in the action bars middle part, bellows one end and flange sealing connection, the other end and weld ring sealing connection, action bars one end and operating device are connected, the other end and turning arm far away main shaft end loose axle connection, the bellows subassembly is the stainless steel material.

Preferably, the operating mechanism comprises an operating handle and a pull rod, the operating handle is arranged on the pull rod, the middle part of the pull rod is vertically and fixedly connected with one end of the operating rod of the corrugated pipe assembly, and the operating handle pulls the pull rod to drive the corrugated pipe assembly to move.

Preferably, the operating mechanism further comprises a travel switch and a secondary guard plate, wherein the travel switch is arranged on the secondary guard plate, and the pull rod presses the travel switch at the grounding position and the closing position to give position signals at different positions.

Preferably, the operating mechanism further comprises a limiting handle and a limiting device, wherein the limiting handle is arranged on the limiting device, and the limiting device limits the position of the pull rod to realize limiting control of the grounding position and the closing position.

Preferably, after the limiting handle pulls the limiting device, the limiting device is lifted, the movement limitation of the pull rod is released, and after the pull rod moves to the grounding position and the closing position, the limiting device is put down to lock the position of the pull rod.

Preferably, the limiting device comprises a limiting plate and a guide bracket, the limiting plate is of a -shaped structure, the limiting handle is arranged at the top of the -shaped structure, two limiting rods are arranged at the vertical parts on two sides of the -shaped structure at intervals, and the limiting plate moves up and down in the guide bracket through the limiting rods.

Preferably, the guide support is -shaped, and guide holes are formed in the upper and lower bends.

Preferably, the size of the guide hole of the guide bracket is larger than that of the limit rod of the limit plate, and the limit rod penetrates through the limit hole to limit the pull rod below the guide bracket.

The isolating switch for the voltage transformer of the inflatable cabinet provided by the scheme has the advantages that the transmission mode is relatively similar to the traditional gear transmission mode, transmission parts are reduced, and the isolating switch is simpler. Meanwhile, with the reduction of transmission parts, transmission idle stroke is reduced, and transmission is more reliable. The straight pull type operation mode is simple and reliable in operation. Meanwhile, the corrugated pipe is additionally arranged on the traditional connecting rod structure, so that the air tightness of the air tank wall is enhanced, the leakage rate is reduced, the device can adapt to the influence of various violent operations and the inflation deformation of the air tank, and the operation is more reliable than that of a traditional mechanism. The lifting type limiting mechanism is accurate in limiting position and simple in limiting operation.

Drawings

FIG. 1 is a view of an application scenario of the present utility model;

FIG. 2 is a detailed view of the switch body of the switch-on position switch of the present utility model;

FIG. 3 is a detailed view of the body of the grounding switch of the present utility model;

FIG. 4 is a general perspective view of the present utility model;

FIG. 5 is a front view of a bellows assembly of the switch body of the present utility model;

FIG. 6 is a perspective view of the external operating mechanism of the gas tank of the present utility model;

the isolating switch for the 1-voltage transformer comprises an isolating switch body, 1101-bellows components, 11011-bellows, 11012-operating rods, 11013-flanges, 11014-welding rings, 11015-shaft sleeves, 1102-spindles, 1103-bearing seats I, 1104-bearing seats II, 1105-crank arms, 1106-isolating rods, 1107-line side fixed contacts, 1108-grounding fixed contacts, 1109-annealed copper wires, 1110-outer cone sleeves, 12-operating mechanisms, 121-operating handles, 122-limiting handles, 123-travel switches, 124-pull rods, 125-secondary guard plates, 126-limiting devices, 2-voltage transformers, 3-voltage transformer chambers, 4-circuit breakers, 5-air chambers, 6-three-position isolating switches and 7-cable chambers.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

The embodiment provides a technical scheme that: the utility model provides an aerify isolator for cabinet voltage transformer, includes the switch body 11 of an air box inside and the external operating device 12 of an air box, switch body 11 and circuit breaker 4, three station isolator 6 are all installed in air chamber 5, circuit breaker 4, three station isolator 6 are installed in air chamber 5 upper portion, voltage transformer 2 is installed in the voltage transformer room 3 of air chamber 5 lower part, and voltage transformer room 3 rear portion is cable room 7, operating device 12 operates switch body 11 and realizes switch body 11's combined floodgate and ground connection, switch body 11 includes a bellows subassembly 1101, a main shaft 1102, a turning arm 1105, three insulator 1106, bellows subassembly 1101 one end is passed air chamber 5 wall and is connected with operating device 12, and the other end and turning arm 1105 one end loose axle coupling, the turning arm other end and main shaft 1102 rigid coupling, switch body 11 still includes bearing frame 1103 and bearing frame two 1104, the both ends of main shaft 1102 are installed respectively in bearing frame 1103 and bearing frame two upper bearings, the rigid coupling has three insulator bars 1106 on main shaft 1102, three insulator bars 1109 the three insulator bars are connected to three insulator bars 1106, three insulator bars are connected to three insulator bars through three insulator bars 1106, and three insulator bars are connected to three seal tube positions 1109 and three insulator bars are connected to three moving bellows position 110 and three insulator bars are connected to three insulator tube positions 1102, and three insulator bars are connected to three insulator tube positions are connected to the moving position of moving device 1101 and are connected to three insulator tube position and side, and are connected to the insulator tube is directly to a moving insulator.

The bellows assembly 1101 comprises a bellows 11011, an operating rod 11012, a flange 11013 and a welding ring 11014, the bellows 11011, the flange 11013 and the welding ring 11014 are sleeved outside the operating rod (11012), the flange 11013 is mounted on the wall of the air chamber 5 in a sealing mode, the welding ring 11014 is welded in the middle of the operating rod 11012 in a sealing mode, one end of the bellows 11011 is connected with the flange 11013 in a sealing mode, the other end of the bellows 11011 is connected with the welding ring 11014 in a sealing mode, one end of the operating rod 11012 is connected with the operating mechanism 12, the end of the other end of the bellows 11012 is perforated to be connected with a movable shaft of a crank arm 1105 far from a main shaft 1102, namely the end of the crank arm 1105 far from the main shaft 1102 is also perforated, a shaft sleeve 11015 can be additionally arranged between the flange 11013 and the operating rod 11012 through a pin shaft, rigidity against violent operation is improved, and the bellows assembly 1101 is made of stainless steel.

The operating mechanism 12 comprises an operating handle 121 and a pull rod 124, the operating handle 121 is arranged on the pull rod 124, the middle part of the pull rod 124 is vertically fixedly connected with one end of an operating rod 11012 of the bellows assembly 1101, and the operating handle 121 pulls the pull rod 124 to drive the bellows assembly 1101 to move. The operating mechanism 12 further comprises a travel switch 123 and a secondary guard plate 125, wherein the travel switch 123 is arranged on the secondary guard plate 125, and the pull rod 124 presses the travel switch 123 to give position signals of different positions at the grounding position and the closing position. The operating mechanism 12 further comprises a limiting handle 122 and a limiting device 126, wherein the limiting handle 122 is installed on the limiting device 126, and the limiting device 126 limits the position of the pull rod 124 to achieve limiting control of the grounding position and the closing position. After the limiting handle 122 lifts the limiting device 126, the movement limitation of the pull rod 124 is released, and after the pull rod 124 moves to the grounding position and the closing position, the limiting device 126 is put down to lock the position of the pull rod 124. The limiting device 126 comprises a limiting plate and a guide bracket, the limiting plate is of a -shaped structure, the limiting handle 122 is arranged at the top of the -shaped structure, two limiting rods are spaced from the vertical parts on two sides of the -shaped structure, and the limiting plate moves up and down in the guide bracket through the limiting rods. The guide support is of a structure, and guide holes are formed in the upper and lower bends. The guide hole size of the guide bracket is larger than the limit rod size of the limit plate, and the limit rod penetrates through the limit hole to limit the pull rod 124 below the guide bracket.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (10)

1. The utility model provides an aerify isolator (1) for cabinet voltage transformer, includes inside switch body (11) of air chamber (5) and the external operating device (12) of air chamber (5), operating device (12) operate switch body (11) realize the combined floodgate and the ground connection of switch body (11), its characterized in that: the switch body (11) comprises a corrugated pipe assembly (1101), a main shaft (1102), a crank arm (1105) and a separation rod (1106), wherein one end of the corrugated pipe assembly (1101) penetrates through the wall of the air chamber (5) to be connected with an operating mechanism (12), the other end of the corrugated pipe assembly is connected with a movable shaft at one end of the crank arm (1105), the other end of the crank arm (1105) is fixedly connected with the main shaft (1102), the separation rod (1106) is connected with an outer cone sleeve (1110) through a annealed copper wire (1109) and then is connected with a voltage transformer (2) outside the air chamber, the operating mechanism (12) drives the corrugated pipe assembly (1101) to move linearly, the corrugated pipe assembly (1101) drives the main shaft (1102) to rotate through the crank arm (1105), the separation rod (1106) moves to a line side fixed contact (1107) to be switched on, and the separation rod (1106) moves to a grounding fixed contact (1108) to the position switch body (11) to be grounded.

2. The isolating switch for a voltage transformer of an inflatable cabinet according to claim 1, wherein: the switch body (11) further comprises a first bearing seat (1103) and a second bearing seat (1104), and two ends of the main shaft (1102) are respectively arranged in bearings on the first bearing seat (1103) and the second bearing seat (1104).

3. An isolating switch for a voltage transformer of an inflatable cabinet according to any one of claims 1-2, characterized in that: the corrugated pipe assembly (1101) comprises a corrugated pipe (11011), an operating rod (11012), a flange (11013) and a welding ring (11014), the corrugated pipe (11011), the flange (11013) and the welding ring (11014) are sleeved outside the operating rod (11012), the flange (11013) is mounted on the wall of the air chamber (5) in a sealing mode, the welding ring (11014) is welded in the middle of the operating rod (11012) in a sealing mode, one end of the corrugated pipe (11011) is connected with the flange (11013) in a sealing mode, the other end of the corrugated pipe is connected with the welding ring (11014) in a sealing mode, one end of the operating rod (11012) is connected with the operating mechanism (12), the other end of the operating rod is connected with a movable shaft at the far main shaft (1102) end of the crank arm (1105), and the corrugated pipe assembly (1101) is made of stainless steel.

4. An isolator for a gas-filled tank voltage transformer as claimed in claim 3, wherein: the operating mechanism (12) comprises an operating handle (121) and a pull rod (124), the operating handle (121) is arranged on the pull rod (124), the middle part of the pull rod (124) is vertically fixedly connected with one end of an operating rod (11012) of the corrugated pipe assembly (1101), and the operating handle (121) pulls the pull rod (124) to drive the corrugated pipe assembly (1101) to move.

5. The isolating switch for a gas-filled tank voltage transformer as claimed in claim 4, wherein: the operating mechanism (12) further comprises a travel switch (123) and a secondary guard plate (125), wherein the travel switch (123) is arranged on the secondary guard plate (125) and a pull rod (124) at a grounding position and a closing position presses the travel switch (123) to give position signals at different positions.

6. The isolating switch for a gas-filled tank voltage transformer as claimed in claim 5, wherein: the operating mechanism (12) further comprises a limiting handle (122) and a limiting device (126), wherein the limiting handle (122) is arranged on the limiting device (126), and the limiting device (126) limits the position of the pull rod (124) so as to realize limiting control of the grounding position and the closing position.

7. The isolating switch for a gas-filled tank voltage transformer as claimed in claim 6, wherein: after the limiting handle (122) lifts the limiting device (126), the movement limitation of the pull rod (124) is released, and after the pull rod (124) moves to the grounding position and the closing position, the limiting device (126) is put down to lock the position of the pull rod (124).

8. The isolating switch for a gas-filled tank voltage transformer as claimed in claim 7, wherein: the limiting device (126) comprises a limiting plate and a guide support, the limiting plate is of a -shaped structure, the limiting handle (122) is arranged at the top of the -shaped structure, two limiting rods are arranged at the vertical parts on two sides of the -shaped structure at intervals, and the limiting plate moves up and down in the guide support through the limiting rods.

9. The isolating switch for a gas-filled tank voltage transformer as claimed in claim 8, wherein: the guide support is of a structure, and guide holes are formed in the upper and lower bends.

10. The isolating switch for a gas-filled tank voltage transformer as claimed in claim 9, wherein: the size of the guide hole of the guide bracket is larger than that of the limit rod of the limit plate, and the limit rod penetrates through the limit hole to limit the pull rod (124) below the guide bracket.