A trolley for replacing and transferring HGIS circuit breaker

Abstract

This utility model discloses a trolley for replacing and transferring HGIS circuit breakers. The trolley includes a bottom frame (1), at least two pairs of wheels (2) with fixed directions are arranged at the bottom of the bottom frame (1), and at least one pair of pressure-bearing columns (3) are provided at the top of the bottom frame (1), with an arc-shaped support groove (4) between the pair of pressure-bearing columns (3) capable of supporting the HGIS circuit breaker. The trolley of this utility model, relying on its stable support concave surface and braking performance, can stably support the HGIS circuit breaker equipment, making it easy to carry the HGIS circuit breaker on the replacement and transfer trolley. During the replacement process, it can quickly and stably complete the pushing and pushing of the equipment on the sliding rail and timely braking.

Description

Technical Field

[0001] This utility model relates to the field of power grid maintenance technology, specifically a trolley for replacing and transferring HGIS circuit breakers. Background Technology

[0002] Strong and stable ultra-high voltage AC / DC transmission has become a crucial cornerstone for energy security and economic development. The HGIS equipment area adopts a compact vertical layout, with the circuit breaker tanks lying horizontally at the bottom. Currently, circuit breaker replacement requires the use of large equipment such as cranes and aerial work platforms. The confined working environment makes direct lifting of the circuit breaker difficult. Furthermore, traditional methods require dismantling the busbar above the circuit breaker and adjacent equipment, leading to complex maintenance procedures and long work cycles due to gas recovery, conductor disassembly and assembly, and equipment docking. Due to these limitations, a single circuit breaker and disconnector failure currently requires the entire line or busbar to be shut down for maintenance, making it impossible to "repair where the fault is," increasing the risk of regional power outages. Therefore, circuit breaker replacement work in recent years has repeatedly impacted the substation's annual power supply plan.

[0003] The existing HGIS circuit breaker replacement follows a top-down sequence: first, the main busbar and its inner conductors are removed; then, the tee and its inner conductors are removed; finally, the current transformer (CT) and its connecting conductors are removed; then, the old circuit breaker to be replaced is removed, and the new circuit breaker is hoisted into place. The disassembled equipment is then gradually restored. During the replacement process, three cranes and channel steel supports are used to support the components to be removed. Two cranes suspend the components, and another 25-ton crane is used to painstakingly lift the HGIS circuit breaker to be replaced, navigating around cable trays and support frames, adjusting its angles and position as needed. Then, using another crane, the new HGIS circuit breaker is slowly installed back into its original position, adjusting its angles and position, thus completing the replacement of the compact HGIS circuit breaker.

[0004] The difficulties and problems encountered in replacing existing HGIS circuit breakers are as follows: (1) When replacing the circuit breaker, there must be a place for a crane to park around it and no obstruction above. However, the circuit breaker of HGIS equipment is arranged in a compact manner and a busbar is usually installed above it, making it difficult for the crane to be deployed. Often, the busbar needs to be stopped. At the same time, indoor cranes cannot enter to replace it.

[0005] (2) If a large area is demolished, many sections will be formed. When these sections are restored, they need to be cleaned, the grooves need to be cleaned, and new sealing rings and adsorbents need to be replaced, which will increase the workload many times over and also face the risk of air leakage if not handled properly.

[0006] (3) The three cranes work together, which results in a lot of time being spent on the replacement of HGIS circuit breakers. The work efficiency is low and the cycle is long, resulting in high rental costs for SF6 recovery vehicles and cranes. Especially in the case of scheduled power outages or emergency repairs, it is difficult to meet the requirements of work efficiency.

[0007] (4) The simultaneous use of three cranes, involving crane operations, high-altitude operations, and cross-operations, has brought about a very serious situation for on-site safety management.

[0008] (5) Steel supports fabricated on-site are often not suitable for reuse on-site after one use, resulting in a low recycling rate of the supports.

[0009] In summary, the rapid, simple, and efficient replacement of HGIS circuit breakers is becoming an urgent problem to be solved in the industry. Utility Model Content

[0010] The purpose of this utility model is to address the problems existing in the prior art by providing a trolley for replacing and transferring HGIS circuit breakers. This trolley can support, transfer, and even lift the HGIS circuit breaker during the replacement process.

[0011] The objective of this utility model is achieved through the following technical solution: A trolley for replacing and transferring HGIS circuit breakers is characterized in that: the trolley includes a bottom frame, at least two pairs of wheels with fixed directions are arranged at the bottom of the bottom frame, at least one pair of pressure-bearing columns are provided at the top of the bottom frame, and an arc-shaped support groove capable of supporting the HGIS circuit breaker is arranged between the pair of pressure-bearing columns.

[0012] The inner surface of the arc-shaped support groove is adapted to the lower outer surface of the HGIS circuit breaker.

[0013] The inner side of the arc-shaped support groove is provided with a flexible support pad that can fit the HGIS circuit breaker.

[0014] The pressure-bearing column and the arc-shaped support groove are integrally formed.

[0015] The pressure-bearing columns are provided with a supporting reinforcing beam located below the arc-shaped supporting groove, and the supporting reinforcing beam is perpendicular to the traveling direction of the trolley.

[0016] A reinforcing beam is provided between adjacent pressure-bearing columns located above the wheels on the same side, and the reinforcing beam is parallel to the direction of travel of the trolley.

[0017] The bottom of the bottom frame is fixedly installed with a wheel mounting groove, and the wheel is oriented and installed in the wheel mounting groove.

[0018] The bottom frame is fitted with straight or cross-shaped reinforcing ribs.

[0019] At least one pair of cleaning push rods are provided at the four bottom corners of the bottom frame. The cleaning push rods located on the outside of the wheel are arranged below the two pressure-bearing columns corresponding to the same arc-shaped support groove. The cleaning push rods themselves or when they hit the limit stop bar on the track also have a braking function.

[0020] Angle steel is symmetrically welded to the bottom frame, and connecting screw holes are opened at the ends of the angle steel to connect and fix it to the trolley with the existing screw holes on the HGIS circuit breaker by bolts.

[0021] The outer side of the pressure-bearing column is welded or integrally formed with a lifting lug, and a downward-opening socket is provided in the lifting lug. The socket is used to fix the lifting rod, and the lifting rod can drive the trolley or the trolley and the HGIS circuit breaker on the trolley to achieve lifting and lowering through the lifting lug.

[0022] Compared with the prior art, the present invention has the following advantages: The trolley of this utility model, relying on its stable support concave surface and braking performance, can stably support the HGIS circuit breaker equipment, making it easy to carry the HGIS circuit breaker on the replacement and transfer trolley. During the replacement process, it can quickly and stably complete the pushing and pulling of the equipment on the sliding rail and timely braking.

[0023] In terms of the disassembly method for replacing HGIS circuit breakers, the trolley of this utility model has the characteristic of being able to rise and fall with the help of a jack. As a result, the disassembly section is greatly reduced from the previous disassembly of the GIL busbar, removal of the current transformer, disassembly of the tee, and disassembly of the circuit breaker connecting flange to only the circuit breaker connecting flange. This greatly improves work efficiency and reduces the risk of air leakage due to improper handling during restoration and installation.

[0024] This utility model's trolley enables rapid, efficient, and safe replacement of current HGIS compact circuit breakers. It significantly reduces the risk levels associated with simultaneous operations by 2-3 cranes, including crane work, high-altitude work, and overlapping operations. Furthermore, leveraging the trolley's simple, lightweight, and flexible features, it changes the operation mode from lifting from above to removing from below, allowing the replacement of HGIS circuit breakers to be completed without interrupting the operation of the upper busbar while it is energized, and without the need for indoor cranes to enter. Attached Figure Description

[0025] Appendix Figure 1 A schematic diagram of the structure of the trolley for replacing and transferring HGIS circuit breakers provided in Embodiment 1 of this utility model; Appendix Figure 2This is a schematic diagram of the structure of the trolley for replacing and transferring HGIS circuit breakers provided in Embodiment 2 of this utility model.

[0026] Wherein: 1—bottom frame; 2—wheel; 3—pressure-bearing column; 4—arc-shaped support groove; 5—flexible support pad; 6—supporting reinforcement beam; 7—wheel mounting groove; 8—frame reinforcing rib; 9—cleaning push rod; 10—angle steel; 11—connecting screw hole; 12—lifting lug; 13—socket hole. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0028] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0029] like Figure 1-2 As shown: A trolley for replacing and transferring HGIS circuit breakers. The trolley includes a bottom frame 1, wheels 2, pressure-bearing columns 3, and arc-shaped support grooves 4. At least two pairs of wheels 2 with fixed directions are arranged at the bottom of the bottom frame 1, and the wheels 2 can only move forward or backward in one direction. At least one pair of pressure-bearing columns 3 are provided at the top of the bottom frame 1, and an arc-shaped support groove 4 capable of supporting the HGIS circuit breaker is arranged between the pair of pressure-bearing columns 3. The inner surface of the arc-shaped support groove 4 is adapted to the lower outer surface of the HGIS circuit breaker.

[0030] To prevent hard contact from damaging the surface of the HGIS circuit breaker and to provide a buffer when the trolley picks up the HGIS circuit breaker, a flexible support pad 5 that can fit the HGIS circuit breaker is arranged on the inner side of the arc-shaped support groove 4.

[0031] To improve the load-bearing strength and resilience of the pressure-bearing column 3 and the arc-shaped support groove 4, various reinforcement methods are provided for selection or combination. Specifically, the pressure-bearing column 3 and the arc-shaped support groove 4 are integrally formed; a support reinforcement beam 6 is provided between the pressure-bearing columns 3, located below the arc-shaped support groove 4, and this support reinforcement beam 6 is perpendicular to the trolley's direction of travel; a co-directional reinforcement beam 7 is provided between adjacent pressure-bearing columns 3 located above the wheels 2 on the same side, and the co-directional reinforcement beam 7 is parallel to the trolley's direction of travel.

[0032] To prevent wheel 2 from shifting and to enhance the directional performance of wheel 2, a wheel mounting groove 7 is fixedly installed at the bottom of the bottom frame 1, and wheel 2 is oriented and installed in the wheel mounting groove 7.

[0033] To enhance the structural performance of the vehicle, straight or cross-shaped frame reinforcing ribs 8 are installed inside the bottom frame 1.

[0034] Because some small parts may fall into the trolley's track during the disassembly of the HGIS circuit breaker, at least one pair of cleaning push rods 9 are installed at the four bottom corners of the bottom frame 1 to avoid obstructing the trolley's movement. The cleaning push rods 9 located on the outside of the wheels 2 are arranged below the two pressure-bearing columns 3 corresponding to the same arc-shaped support groove 4. Generally, it is sufficient to arrange one pair of cleaning push rods 9 on the outside of the wheels 2 in the direction of HGIS circuit breaker ejection. Of course, cleaning push rods 9 can also be arranged at the bottom of all four corners of the trolley.

[0035] Depending on the functional requirements of the trolley, some trolleys need to be able to fix the components on the HGIS circuit breaker to achieve a stable connection. Angle steel 10 is symmetrically welded on the bottom frame 1 of this type of trolley, and connecting screw holes 11 are opened on the end of the angle steel 10 to achieve bolt connection and fixation on the trolley with the existing screw holes on the HGIS circuit breaker.

[0036] Depending on the functional requirements of the trolley, some trolleys need to rise to the bottom of the HGIS circuit breaker to support the descent of the HGIS circuit breaker. Therefore, a lifting lug 12 is welded or integrally formed on the outside of the pressure-bearing column 3 of this type of trolley, and a downward-opening socket 13 is provided in the lifting lug 12. The socket 13 is used to fix the insertion of the lifting rod, and the lifting rod can drive the trolley, or the trolley and the HGIS circuit breaker on the trolley, to rise and fall through the lifting lug 12. Example 1

[0037] This embodiment provides a trolley for replacing and transferring HGIS circuit breakers, such as... Figure 1As shown, this type of trolley has supporting, lifting, and moving functions, and can be called a lifting trolley. The trolley includes a bottom frame 1, wheels 2, pressure-bearing columns 3, arc-shaped support grooves 4, flexible support pads 5, support reinforcing beams 6, wheel mounting grooves 7, angle steel 10, connecting bolt holes 11, lifting lugs 12, and socket holes 13. The bottom frame 1 is formed by welding rectangular steel pipes, and four wheels 2 are fixed in four directions at the bottom of the bottom frame 1. The wheels 2 are oriented and installed in the wheel mounting grooves 7, so that the wheels 2 can only move forward or backward in one direction. A pair of pressure-bearing columns 3 are symmetrically welded to the top rear side of the bottom frame 1, and a... An arc-shaped support groove 4 is provided to support the HGIS circuit breaker. The inner surface of the arc-shaped support groove 4 is adapted to the lower outer surface of the HGIS circuit breaker. The pressure-bearing column 3 and the arc-shaped support groove 4 are integrally formed, and a supporting reinforcing beam 6 is provided between the pressure-bearing columns 3, located below the arc-shaped support groove 4. The supporting reinforcing beam 6 is perpendicular to the traveling direction of the trolley. Angle steel 10 is symmetrically welded to the bottom frame 1 on the front side of the pressure-bearing column 3, and a connecting screw hole 11 is opened at the end of the angle steel 10 to realize the connection and fixation to the trolley by bolts with the existing screw holes on the HGIS circuit breaker. At the same time, lifting lugs 12 are welded to the outer sides of the two pressure-bearing columns 3, and a downward-opening socket hole 13 is provided in the lifting lug 12. The socket hole 13 is used to fix the insertion of the lifting rod. The lifting rod can drive the trolley, or the trolley and the HGIS circuit breaker on the trolley, to lift and lower through the lifting lugs 12.

[0038] The trolley for HGIS circuit breaker replacement and transfer provided in this embodiment does not have a cleaning push rod 9, but it can be configured according to requirements in actual use. Example 2

[0039] This embodiment provides a trolley for replacing and transferring HGIS circuit breakers, such as... Figure 2 As shown, this type of trolley has supporting and moving functions and can be called a pushing trolley. The trolley includes a bottom frame 1, wheels 2, pressure-bearing columns 3, arc-shaped support grooves 4, flexible support pads 5, wheel mounting grooves 7, frame reinforcing ribs 8, and cleaning push rods 9. The bottom frame 1 is formed by welding rectangular steel pipes, and the bottom frame 1 has straight frame reinforcing ribs 8 welded inside. Four wheels 2 are fixed in four directions at the bottom of the bottom frame 1. The wheels 2 are oriented and installed in the wheel mounting grooves 7, so that the wheels 2 can only move forward or backward in one direction. A pair of pressure-bearing columns 3 are symmetrically welded to the top rear side of the bottom frame 1, and an arc-shaped support groove 4 capable of supporting the HGIS circuit breaker is arranged between the pair of pressure-bearing columns 3. The pressure-bearing columns 3 and the arc-shaped support groove 4 are integrally formed, and the inner surface of the arc-shaped support groove 4 is adapted to the lower outer surface of the HGIS circuit breaker. A pair of cleaning push rods 9 are welded to the bottom of the bottom frame 1. The cleaning push rods 9 located outside the wheels 2 are arranged below the two pressure-bearing columns 3 corresponding to the same arc-shaped support groove 4.

[0040] The trolley of this utility model, relying on its stable support concave surface and braking performance, can stably support the HGIS circuit breaker equipment, making it easy to carry the HGIS circuit breaker on the replacement and transfer trolley. During the replacement process, it can quickly and stably complete the pushing and pulling of the equipment on the sliding rail and timely braking.

[0041] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0042] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0043] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A trolley for replacing and transferring HGIS circuit breakers, characterized in that: The trolley includes a bottom frame (1), at least two pairs of wheels (2) with fixed directions are arranged at the bottom of the bottom frame (1), at least one pair of pressure-bearing columns (3) are provided at the top of the bottom frame (1), and an arc-shaped support groove (4) capable of supporting the HGIS circuit breaker is arranged between the pair of pressure-bearing columns (3). At least one pair of cleaning push rods (9) are provided at the four corners of the bottom frame (1). The cleaning push rods (9) located on the outside of the wheel (2) are arranged below the two pressure-bearing columns (3) corresponding to the same arc-shaped support groove (4). Angle steel (10) is symmetrically welded on the bottom frame (1), and connecting screw holes (11) are opened on the end of the angle steel (10) to realize the connection and fixation on the trolley with the existing screw holes on the HGIS circuit breaker by bolts; The outer side of the pressure-bearing column (3) is welded or integrally formed with a lifting lug (12), and a downward-facing socket hole (13) is provided in the lifting lug (12). The socket hole (13) is used to fix the insertion of the lifting rod, and the lifting rod can drive the trolley or the trolley and the HGIS circuit breaker on the trolley to achieve lifting and lowering through the lifting lug (12).

2. The trolley for replacing and transferring HGIS circuit breakers according to claim 1, characterized in that: The inner side of the arc-shaped support groove (4) is provided with a flexible support pad (5) that can fit the HGIS circuit breaker.

3. The trolley for replacing and transferring HGIS circuit breakers according to claim 1, characterized in that: The pressure-bearing column (3) and the arc-shaped support groove (4) are integrally formed.

4. The trolley for replacing and transferring HGIS circuit breakers according to claim 1, characterized in that: A supporting reinforcing beam (6) is provided between the pressure-bearing columns (3) and located below the arc-shaped support groove (4). The supporting reinforcing beam (6) is perpendicular to the direction of travel of the trolley.

5. The trolley for replacing and transferring HGIS circuit breakers according to claim 1, characterized in that: A reinforcing beam is provided between adjacent pressure-bearing columns (3) located above the wheels (2) on the same side, and the reinforcing beam is parallel to the direction of travel of the trolley.

6. The trolley for replacing and transferring HGIS circuit breakers according to claim 1, characterized in that: The bottom frame (1) is fixedly installed with a wheel mounting groove (7), and the wheel (2) is oriented and installed in the wheel mounting groove (7).

7. The trolley for replacing and transferring HGIS circuit breakers according to claim 1, characterized in that: The bottom frame (1) is equipped with a straight or cross-shaped frame reinforcing rib (8).

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