Compact type HGIS circuit breaker replacement device

Abstract

The utility model discloses a compact type HGIS (hybrid gas insulated switchgear) circuit breaker replacement device, which comprises a door-shaped support used for supporting equipment above a circuit breaker, a transfer track laid right below the circuit breaker and extending outwards along the arrangement direction of the circuit breaker, a jacking trolley and a hydraulic jack, and is characterized in that the transfer track is positioned in the door-shaped support; at least one pair of jacking trolleys capable of bearing the circuit breaker is arranged on the transfer track, wheels of the jacking trolleys are embedded into track grooves of the transfer track and can advance in the arrangement direction of the track grooves, and a pair of hydraulic jacks is correspondingly arranged on each of the two sides of each jacking trolley. And the hydraulic jack can simultaneously drive the jacking trolley to ascend to leave the track groove and drive the jacking trolley to descend to fall back to the track groove after the jacking trolley supports the circuit breaker. According to the utility model, equipment above the circuit breaker can be directly supported, sunk and pushed out to-be-replaced circuit breakers without dismounting, the maintenance cost is controlled, the maintenance efficiency is improved, and the maintenance scientific and technological level is improved.

Description

Technical Field

[0001] This utility model relates to the field of power grid maintenance technology, specifically a compact HGIS circuit breaker replacement device. 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:

[0005] (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.

[0006] (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.

[0007] (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.

[0008] (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.

[0009] (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.

[0010] 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

[0011] The purpose of this invention is to address the problems existing in the prior art by providing a compact HGIS circuit breaker replacement device that can quickly, easily, and efficiently replace HGIS circuit breakers.

[0012] The objective of this utility model is achieved through the following technical solution:

[0013] A compact HGIS circuit breaker replacement device is characterized in that: the replacement device includes a portal frame for supporting the equipment above the circuit breaker, a transfer track laid directly below the circuit breaker and extending outward along the circuit breaker's installation direction, a lifting trolley, and hydraulic jacks. The transfer track is located inside the portal frame and is perpendicular to the portal frame. At least one pair of lifting trolleys capable of supporting the circuit breaker is provided on the transfer track. The wheels of the lifting trolleys are embedded in the track grooves of the transfer track and can travel along the track grooves. A pair of hydraulic jacks are respectively provided on both sides of each lifting trolley. The hydraulic jacks can simultaneously drive the lifting trolleys to rise away from the track grooves of the transfer track and, after the lifting trolleys support the circuit breaker, drive the lifting trolleys to descend back to the track grooves of the transfer track.

[0014] The transfer track is equipped with several pushing trolleys located between the lifting trolleys. The wheels of each pushing trolley are embedded in the track groove of the transfer track and can travel along the setting direction of the track groove.

[0015] The aforementioned portal brackets are installed in pairs, with the two portal brackets spanning the transfer track supporting the bottom sides of the equipment above the circuit breaker respectively.

[0016] The gantry bracket includes support columns, support beams, and adjusting bolts. The tops of the support columns located on both sides of the transfer track are connected to the bottom of the same support beam by adjusting bolts. The sum of the heights of the vertically set support columns and the horizontally set support beams is lower than the bottom height of the equipment above the circuit breaker. The top of the support beam is adjusted to rest against the bottom of the equipment above the circuit breaker by adjusting the adjusting bolts.

[0017] The transfer track consists of two long, narrow track grooves and a track beam, with the two track grooves fixedly connected by the track beam.

[0018] The transfer track consists of a circuit breaker section located below the circuit breaker and a push-out section located in the direction of circuit breaker push-out. Multiple independent supports are laid at the bottom of the transfer track in the circuit breaker section to fix and support the transfer track. Support sleepers for supporting the transfer track are arranged in the push-out section, and limit stops are arranged at the end of the transfer track in the push-out section.

[0019] Both the lifting trolley and the pushing trolley include 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 circuit breaker is arranged between the pair of pressure-bearing columns. The inner surface of the arc-shaped support groove is adapted to the lower outer surface of the circuit breaker.

[0020] The inner side of the arc-shaped support groove is provided with a flexible support pad that can fit the lower outer surface of the circuit breaker; the pressure-bearing column and the arc-shaped support groove are integrally formed; a support reinforcement beam is provided between the pressure-bearing columns, located below the arc-shaped support groove, and the support reinforcement beam is perpendicular to the traveling direction of the trolley; a co-directional reinforcement beam is provided between adjacent pressure-bearing columns located above the wheels on the same side, and the co-directional reinforcement beam is parallel to the traveling direction of the trolley. The given illustrations all show the co-directional reinforcement beam, but this does not prevent the installation of co-directional reinforcement beams to enhance structural performance.

[0021] The bottom frame is equipped with a straight or cross-shaped frame reinforcing rib; a wheel mounting groove is fixedly installed at the bottom of the bottom frame, and the wheel is oriented and installed in the wheel mounting groove; at least one pair of cleaning push rods are provided at the four corners of the bottom of the bottom frame, and 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.

[0022] Angle steel is symmetrically welded to the bottom frame of the lifting trolley, and connecting screw holes are opened at the ends of the angle steel. The connecting screw holes can be connected to the existing screw holes on the circuit breaker by bolts. Lifting lugs are welded or integrally formed on the outside of the pressure-bearing column, and a downward-opening socket is provided in the lifting lug. The socket is used to fix the insertion of the lifting rod, and the lifting rod can drive the lifting trolley, or the lifting trolley and the circuit breaker on the lifting trolley to achieve lifting and lowering through the lifting lug.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] The replacement device provided by this utility model can achieve the replacement of the circuit breaker without removing the equipment above the HGIS circuit breaker, by directly lowering the circuit breaker to be replaced and then pushing it out, thereby greatly reducing the amount of equipment that needs to be removed.

[0025] The replacement device provided by this invention effectively reduces high-altitude operations, dismantling, and installation, and enables rapid replacement of 350-750 kV HGIS circuit breakers. This is particularly significant for rapid replacement of HGIS circuit breakers during emergency repairs.

[0026] The replacement device provided by this utility model can significantly reduce the rental of cranes and SF6 recycling vehicles and the input of personnel, thereby controlling maintenance costs, improving maintenance efficiency, and enhancing the level of maintenance technology.

[0027] The replacement device provided by this utility model is not limited by the busbar above the HGIS circuit breaker, which helps to avoid busbar outage and reduce the power outage area.

[0028] The replacement device provided by this utility model can be installed indoors and can be used for the rapid replacement of faulty indoor HGIS.

[0029] The replacement device provided by this utility model has greater versatility. The support devices on both sides are suitable for support at different heights. The replacement device operates by lifting → removing the old HGIS circuit breaker → lowering the old HGIS circuit breaker → placing the old HGIS circuit breaker on the track → pushing out the old HGIS circuit breaker → replacing it with a new HGIS circuit breaker → pushing in the new HGIS circuit breaker → lifting and installing it. This has set a new record for the rapid replacement and maintenance of HGIS circuit breakers and has great application and promotion value. It has already been applied to the replacement and maintenance of HGIS circuit breakers in many indoor and outdoor locations. Attached Figure Description

[0030] Appendix Figure 1 A schematic diagram of the compact HGIS circuit breaker replacement device provided by this utility model;

[0031] Appendix Figure 2 This is a schematic diagram of the lifting trolley provided by this utility model;

[0032] Appendix Figure 3 This is a schematic diagram of the structure of the pushing trolley provided by this utility model;

[0033] Appendix Figure 4 A schematic diagram showing the state of the compact HGIS circuit breaker replacement device provided by this utility model when the circuit breaker is pushed out.

[0034] Wherein: 1—Gateway bracket; 11—Support column; 12—Support beam; 13—Adjusting bolt; 2—Transfer track; 21—Track beam; 22—Support sleeper; 23—Independent support; 24—Limit stop bar; 3—Lifting trolley; 4—Pushing trolley; 5—Hydraulic jack; 61—Bottom frame; 62—Wheel; 63—Pressure-bearing column; 64—Arc-shaped support groove; 65—Flexible support pad; 66—Support reinforcing beam; 67—Wheel mounting groove; 68—Frame reinforcing rib; 69—Clearing push rod; 610—Angle steel; 611—Connecting bolt hole; 612—Lifting lug; 613—Socket hole. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] like Figure 1-3 As shown: A compact HGIS circuit breaker replacement device includes a gantry bracket 1 for supporting the equipment above the circuit breaker, a transfer track 2 laid directly below the circuit breaker and extending outward along the circuit breaker's installation direction, a lifting trolley 3, and hydraulic jacks 5. The transfer track 2 is located inside the gantry bracket 1 and is set perpendicular to the gantry bracket 1. At least one pair of lifting trolleys 3 capable of supporting the circuit breaker is set on the transfer track 2. The wheels 62 of the lifting trolleys 3 are embedded in the track grooves of the transfer track 2 and can travel along the installation direction of the track grooves. A pair of hydraulic jacks 5 are respectively set on both sides of each lifting trolley 3. The hydraulic jacks 5 can simultaneously drive the lifting trolley 3 to rise away from the track grooves of the transfer track 2, and after the lifting trolley 3 supports the circuit breaker, drive the lifting trolley 3 to fall back into the track grooves of the transfer track 2.

[0038] Furthermore, in order to reduce the weight borne by the lifting trolley 3 during transfer, several pushing trolleys 4 are provided on the transfer track 2 between the lifting trolleys 3. The wheels 62 of each pushing trolley 4 are embedded in the track groove of the transfer track 2 and can move along the setting direction of the track groove. By adding the pushing trolleys 4, the support requirements of the lifting trolley 3 during transfer are shared and the stability of the circuit breaker during transfer is improved.

[0039] Furthermore, to balance the equipment above the circuit breaker and enhance stability, a pair of portal brackets 1 are arranged between the bottom of the equipment above the circuit breaker and the top of the circuit breaker. The two portal brackets 1 spanning the transfer track 2 can respectively support the bottom sides of the equipment above the circuit breaker. Specifically, the portal bracket 1 includes a support column 11, a support beam 12, and adjusting bolts 13. The tops of the support columns 11 located on both sides of the transfer track 2 are connected to the bottom of the same support beam 12 through adjusting bolts 13. The sum of the heights of the vertically arranged support column 11 and the horizontally arranged support beam 12 is lower than the bottom height of the equipment above the circuit breaker. The top of the support beam 12 is adjusted by adjusting bolts 13 so that it rests against the bottom of the equipment above the circuit breaker.

[0040] Specifically, the transfer track 2 consists of two long, narrow track grooves and a track beam 21, with the two track grooves fixedly connected by the track beam 21. The transfer track 2 consists of a circuit breaker section located below the circuit breaker and an extension section located in the direction of circuit breaker extension. Multiple independent supports 23 are laid at the bottom of the transfer track 2 in the circuit breaker section to fix and support the transfer track 2. Support sleepers 22 are arranged in the extension section to support the transfer track 2, and a limit stop bar 24 is arranged at the end of the transfer track 2 in the extension section to prevent the lifting trolley 3 and the pushing trolley 4 from sliding off the transfer track 2 due to inertia during the transfer of the circuit breaker.

[0041] The structure of the lifting trolley 3 is as follows Figure 2As shown, the lifting trolley 3 has supporting, lifting, and moving functions. The lifting trolley 3 includes a bottom frame 61, wheels 62, pressure-bearing columns 63, arc-shaped support grooves 64, flexible support pads 65, support reinforcing beams 66, wheel mounting grooves 67, angle steel 610, connecting bolt holes 611, lifting lugs 612, and socket holes 613. The bottom frame 61 is formed by welding rectangular steel pipes, and four wheels 62 are fixed in four directions at the bottom of the bottom frame 61. The wheels 62 are oriented and installed in the wheel mounting grooves 67, so that the wheels 62 can only move forward or backward in one direction. A pair of pressure-bearing columns 63 are symmetrically welded to the rear top of the bottom frame 61. An arc-shaped support groove 64 capable of supporting the HGIS circuit breaker is arranged between the 3. The inner surface of the arc-shaped support groove 64 is adapted to the lower outer surface of the HGIS circuit breaker. The pressure-bearing column 63 and the arc-shaped support groove 64 are integrally formed, and a support reinforcing beam 66 located below the arc-shaped support groove 64 is provided between the pressure-bearing columns 63. The support reinforcing beam 66 is perpendicular to the travel direction of the lifting trolley 6. Angle steel 610 is symmetrically welded on the bottom frame 61 on the front side of the pressure-bearing column 63, and a connecting screw hole 611 is opened on the end of the angle steel 610 to realize the connection and fixation to the lifting trolley 6 by bolts with the existing screw holes on the circuit breaker. Meanwhile, lifting lugs 612 are welded to the outside of both pressure-bearing columns 63, and a downward-opening socket 613 is provided in the lifting lugs 612. The socket 613 is used to fix the lifting rod inserted into the hydraulic jack 5. The lifting rod can drive the lifting trolley 6, or the lifting trolley 6 and the circuit breaker on the lifting trolley 6 to achieve lifting and lowering through the lifting lugs 612.

[0042] The structure of the trolley 4 is as follows Figure 3As shown, the trolley 4 has supporting and moving functions. The trolley 4 includes a bottom frame 61, wheels 62, pressure-bearing columns 63, arc-shaped support grooves 64, flexible support pads 65, wheel mounting grooves 67, frame reinforcing ribs 68, and a cleaning push rod 69. The bottom frame 61 is formed by welding rectangular steel pipes, and the bottom frame 61 has straight frame reinforcing ribs 68 welded inside. Four wheels 62 are fixed in four directions at the bottom of the bottom frame 61, and the wheels 62 are oriented and installed in the wheel mounting grooves 67, so that the wheels 62 can only move forward or backward in one direction. Four pressure-bearing columns are symmetrically welded to the top of the four corners of the bottom frame 61. Two pressure-bearing columns 63 located along the length of the bottom frame 61 constitute a pair of pressure-bearing columns 63, that is, two pairs of pressure-bearing columns 63. Between each pair of pressure-bearing columns 63, there is an arc-shaped support groove 64 that can support the circuit breaker and is perpendicular to the transfer track 2. The pressure-bearing columns 63 and the arc-shaped support groove 64 are integrally formed. The inner surface of the arc-shaped support groove 64 is adapted to the lower outer surface of the circuit breaker. A pair of cleaning push rods 69 are welded to the bottom of the bottom frame 61. The cleaning push rods 69 located on the outside of the wheel 62 are arranged below the two pressure-bearing columns 63 corresponding to the same arc-shaped support groove 64.

[0043] Because some loose parts will fall into the tracks of the lifting trolley 3 and the pushing trolley 4 during the disassembly of the HGIS circuit breaker, at least one pair of cleaning push rods 69 are provided at the four bottom corners of the bottom frame 61 to avoid obstructing their movement. The cleaning push rods 69 located outside the wheels 62 are arranged below the two pressure-bearing columns 63 corresponding to the same arc-shaped support groove 64. Generally, it is sufficient to arrange one pair of cleaning push rods 69 outside the wheels 62 in the circuit breaker ejection direction. Of course, cleaning push rods 69 can also be arranged at the bottom of the four corners of both the lifting trolley 3 and the pushing trolley 4. The lifting trolley 3 is not equipped with cleaning push rods 69, but this can be configured according to requirements in actual use. Example

[0044] This utility model provides a compact HGIS circuit breaker replacement device, such as... Figure 1-3 As shown, during the replacement of the compact HGIS circuit breaker, the support column 11 and the support beam 12 are connected by adjusting bolt 13, thereby forming at least two pairs of portal brackets 1 ( Figure 1 Only one portal frame 1 is shown as an example. The specific number of portal frames 1 required is set according to the actual situation. Only portal frames 1 parallel to the one shown in the figure need to be set. The support beam 12 can be raised and lowered by adjusting the nuts on the bolts 13 to support the equipment above the compact HGIS circuit breaker and remove it after use.

[0045] After the portal frame 1 is erected, when replacing the compact HGIS circuit breaker, an independent support 23 is laid at the bottom of the compact HGIS circuit breaker, and a support sleeper 22 is laid at the push-out position. The transfer rail 2 is then laid on top of the already laid independent support 23 and support sleeper 22. The two long strip track grooves in the transfer rail 2 are connected by bolts using a track beam 21 to form a solid whole. Then, the limit stop bar 1 is inserted through the holes at both ends of the transfer rail 2 to prevent the pushing trolley 4 and the lifting trolley 3 placed on the transfer rail 2 from falling off the transfer rail 2.

[0046] In terms of the use of the trolleys, four pushing trolleys 4 are placed between two lifting trolleys 3 and together on the transfer rail 2 at the bottom of the compact HGIS circuit breaker; four hydraulic jacks 5 are placed vertically on the ground and / or other fixed platforms, and the pushing rods of the hydraulic jacks 5 can be aligned with the reserved lifting position (socket hole 613) of the lifting trolley 3.

[0047] During the replacement of the compact HGIS circuit breaker, after completing the above preparations, the hydraulic jacks 5 are started and controlled by an electronic synchronizer. The two lifting trolleys 3, placed directly below the compact HGIS circuit breaker, move synchronously away from the transfer track 2 and are lifted upwards under the action of the pushing rods of the hydraulic jacks 5. At this time, the wheels 62 of the two lifting trolleys 3 gradually detach from the transfer track 2, and finally the flexible support pads 65 of the two lifting trolleys 3 support the body of the compact HGIS circuit breaker. After being lifted into position, the connecting bolts between the compact HGIS circuit breaker and the equipment above (such as current transformers) are removed, and the supports that previously supported the compact HGIS circuit breaker are removed, so that the HGIS circuit breaker is separated from the equipment above and its own existing supports. At this time, the weight of the HGIS circuit breaker is completely supported by the two lifting trolleys 3 and the hydraulic jacks 5 placed directly below. Then, slowly lower the push rod of hydraulic jack 5, simultaneously lowering the two lifting trolleys 3 and the compact HGIS circuit breaker body until the wheels 62 of the lifting trolley 3 are embedded in the track groove of the transfer track 2. At the same time, the middle body of the compact HGIS circuit breaker falls into the supporting arc surface of the push trolley 4. Then, continue lowering the push rod of hydraulic jack 5 so that the push trolley 4 and the lifting trolley 3 completely support the compact HGIS circuit breaker. Then remove hydraulic jack 5. Then, manually and slowly push the compact HGIS circuit breaker, moving the push trolley 4 and the lifting trolley 3 outwards within the transfer track 2 (e.g., ...). Figure 4 As shown, the removed compact HGIS circuit breaker is pushed out of its installation position, and the limit stop bar 24 is locked to limit the extreme positions of the pushing trolley 4 and the lifting trolley 3 when they travel on the transfer track 2.

[0048] When installing a new compact HGIS circuit breaker, the old compact HGIS circuit breaker is lifted off the lifting trolley 3 and pushing trolley 4 using a crane, and the new compact HGIS circuit breaker to be installed is lifted onto the lifting trolley 3 and pushing trolley 4. The compact HGIS circuit breaker is then slowly pushed manually, causing the pushing trolley 4 and lifting trolley 3 to move in opposite directions within the transfer track 2, pushing the new compact HGIS circuit breaker directly below the installation position. The hydraulic jack 5 is then vertically positioned in the set location, and the pushing rod is operated upwards to lift the lifting trolley 3, along with the new compact HGIS circuit breaker seated on the pushing trolley 4 and lifting trolley 3, to the installation position. The bolts connecting the new compact HGIS circuit breaker to the equipment above are then connected, and the equipment support below the new compact HGIS circuit breaker is restored. Finally, the pushing rod of the hydraulic jack 5 is operated to lower the lifting trolley 3, separating it from the new compact HGIS circuit breaker.

[0049] After replacing the old compact HGIS circuit breaker with a new one, remove the laid transfer track 2 and other related equipment, and remove the gantry bracket 1 above the top support equipment to complete the replacement of the compact HGIS circuit breaker.

[0050] The replacement device provided by this utility model is not restricted by the busbar above the HGIS circuit breaker, which helps to avoid busbar shutdown and reduce the power outage area; it allows the equipment above the HGIS circuit breaker to be replaced to be lowered directly without removing it, and then the circuit breaker to be replaced can be pushed out, thus greatly reducing the equipment that needs to be removed; it can effectively reduce high-altitude operations, high-altitude dismantling and installation, and can realize the rapid replacement of 350-750 kV HGIS circuit breakers, which is more significant for the rapid replacement of HGIS circuit breakers during emergency repairs; it can greatly reduce the rental of cranes and SF6 recycling trucks and personnel, thereby controlling maintenance costs, improving maintenance efficiency, and improving the level of maintenance technology; it can be used indoors for the rapid replacement of indoor faulty HGIS circuit breakers.

[0051] Currently, the replacement device provided by this utility model has been piloted at the Shapotou Substation and Saishang Substation. Four key metrics demonstrating improved maintenance efficiency are: replacement of 7 sets of HGIS circuit breakers within 7 days; replacement time for a single circuit breaker reduced from 2 days to 6 hours; reduction of personnel per bay from 24 to 10; and an 80% reduction in gas recovery. In the future, the company will upgrade and modify the device based on on-site practical application, continuously develop a "one bay, one solution" approach, and promote standardized maintenance procedures to address potential hazards in similar circuit breakers, effectively improving the operational reliability of switchgear.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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 compact HGIS circuit breaker replacement device, characterized in that: The replacement device includes a gantry bracket (1) for supporting the equipment above the circuit breaker, a transfer track (2) laid directly below the circuit breaker and extending outward along the circuit breaker's setting direction, a lifting trolley (3), and hydraulic jacks (5). The transfer track (2) is located inside the gantry bracket (1) and is set perpendicular to the gantry bracket (1). At least one pair of lifting trolleys (3) capable of supporting the circuit breaker is set on the transfer track (2). The wheels (62) of the lifting trolleys (3) are embedded in the track groove of the transfer track (2) and can travel along the setting direction of the track groove. A pair of hydraulic jacks (5) are respectively set on both sides of each lifting trolley (3). The hydraulic jacks (5) can simultaneously drive the lifting trolleys (3) to rise away from the track groove of the transfer track (2) and drive the lifting trolleys (3) to fall back to the track groove of the transfer track (2) after the lifting trolleys (3) support the circuit breaker.

2. The compact HGIS circuit breaker replacement device according to claim 1, characterized in that: The transfer track (2) is provided with several pushing trolleys (4) located between the lifting trolleys (3). The wheels (62) of each pushing trolley (4) are embedded in the track groove of the transfer track (2) and can travel along the setting direction of the track groove.

3. The compact HGIS circuit breaker replacement device according to claim 1 or 2, characterized in that: The portal brackets (1) are arranged in pairs, and the two portal brackets (1) spanning the transfer track (2) can support the bottom sides of the equipment above the circuit breaker respectively.

4. The compact HGIS circuit breaker replacement device according to claim 3, characterized in that: The portal frame (1) includes a support column (11), a support beam (12) and an adjusting bolt (13). The top of the support column (11) located on both sides of the transfer track (2) is connected to the bottom of the same support beam (12) by the adjusting bolt (13). The sum of the heights of the vertically set support column (11) and the horizontally set support beam (12) is lower than the bottom height of the equipment above the circuit breaker. The top of the support beam (12) is pressed against the bottom of the equipment above the circuit breaker by adjusting the adjusting bolt (13).

5. The compact HGIS circuit breaker replacement device according to claim 1, characterized in that: The transfer track (2) consists of two long strip track grooves and a track beam (21), and the two track grooves are fixedly connected by the track beam (21).

6. The compact HGIS circuit breaker replacement device according to claim 1 or 5, characterized in that: The transfer track (2) consists of a circuit breaker section located below the circuit breaker and a push-out section located in the direction of the circuit breaker push-out. Multiple independent supports (23) are laid at the bottom of the transfer track (2) in the circuit breaker section to fix and support the transfer track (2). Support sleepers (22) for supporting the transfer track (2) are arranged in the push-out section, and limit stops (24) are arranged at the end of the transfer track (2) in the push-out section.

7. The compact HGIS circuit breaker replacement device according to claim 2, characterized in that: The lifting trolley (3) and the pushing trolley (4) both include a bottom frame (61). At least two pairs of wheels (62) with fixed directions are arranged at the bottom of the bottom frame (61). At least one pair of pressure-bearing columns (63) are provided at the top of the bottom frame (61), and an arc-shaped support groove (64) capable of supporting the circuit breaker is arranged between the pair of pressure-bearing columns (63). The inner surface of the arc-shaped support groove (64) is adapted to the lower outer surface of the circuit breaker.

8. The compact HGIS circuit breaker replacement device according to claim 7, characterized in that: The inner side of the arc-shaped support groove (64) is provided with a flexible support pad (65) that can fit the lower outer surface of the circuit breaker; the pressure-bearing column (63) and the arc-shaped support groove (64) are integrally formed; a support reinforcing beam (66) located below the arc-shaped support groove (64) is provided between the pressure-bearing columns (63), and the support reinforcing beam (66) is perpendicular to the traveling direction of the trolley; a co-directional reinforcing beam is provided between adjacent pressure-bearing columns (63) located above the wheels (62) on the same side, and the co-directional reinforcing beam is parallel to the traveling direction of the trolley.

9. The compact HGIS circuit breaker replacement device according to claim 7 or 8, characterized in that: The bottom frame (61) is equipped with a straight or cross-shaped frame reinforcing rib (8); a wheel mounting groove (67) is fixedly installed at the bottom of the bottom frame (61), and the wheel (62) is oriented and installed in the wheel mounting groove (67); at least one pair of cleaning push rods (9) are provided at the four corners of the bottom of the bottom frame (61), and the cleaning push rod (9) located outside the wheel (62) is arranged below the two pressure-bearing columns (63) corresponding to the same arc-shaped support groove (64).

10. The compact HGIS circuit breaker replacement device according to claim 7, characterized in that: Angle steel (610) is symmetrically welded to the bottom frame (61) of the lifting trolley (3), and a connecting screw hole (611) is opened at the end of the angle steel (610). The connecting screw hole (611) can be connected to the existing screw hole on the circuit breaker by bolts. The outer side of the pressure column (63) is welded or integrally formed with a lifting lug (612), and a socket hole (613) with an opening facing downward is provided in the lifting lug (612). The socket hole (613) is used to fix the insertion of the lifting rod, and the lifting rod can drive the lifting trolley (3) or the circuit breaker on the lifting trolley (3) to lift through the lifting lug (612).

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