GIS double-break disconnector assembling tool

Abstract

The present application relates to the field of special equipment for assembling switch devices, and particularly relates to a GIS double-break disconnecting switch assembly tool. The GIS double-break disconnecting switch assembly tool comprises a support extending in a horizontal direction, the support comprises a top mounting surface arranged on the top of the support, and the top mounting surface is spaced apart along the length direction of the support and is provided with three groups of support seats for supporting and positioning three-phase movable part conductors, the three groups of support seats comprise a group of fixed support seats and two groups of movable support seats capable of moving along the arrangement direction of the support seats, and the support is further detachably provided with a support part for supporting a disconnecting switch housing. The three-phase movable part conductors are respectively fixed on the three groups of support seats, and the distance between two-phase movable part conductors can be adjusted by moving the movable support seats, the adjustment mode is more convenient, the movable support seats are more stable when moving, and the collision between the movable part conductors and the housing during assembly is avoided.

Description

Technical Field

[0001] This invention relates to the field of specialized equipment for assembling switchgear, and more particularly to an assembly fixture for a GIS double-break disconnector switch. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) is now widely used in high-voltage, ultra-high-voltage, and extra-high-voltage fields. With the continuous increase in power supply load and grid optimization, the number of GIS equipment upgrades and expansions is gradually increasing. Simultaneously, as the service life of GIS equipment increases, the number of GIS devices entering their maintenance cycle is also gradually increasing. During later-stage expansion of GIS systems, power outages are required for adjacent sections, and each newly installed section must undergo withstand voltage and aging tests, which exposes the system to the difficulties and risks of power outages. However, power outages during expansion or maintenance mean delays in construction progress, waste of manpower and resources, and direct or indirect economic losses. Therefore, to meet the needs of uninterrupted expansion or maintenance, double-break busbar disconnectors have been developed.

[0003] Chinese invention patent application CN117275975A discloses a double-break disconnect switch, including an inner cavity with movable conductors for three phases X, Y, and Z inside the cavity. Each movable conductor includes a moving contact assembly and a support component located at the bottom of the moving contact assembly. Two moving contact assemblies are connected by interphase transmission rods. The movable conductors are mounted on the housing through the support component. The top of the housing has a straight tube communicating with the cavity, and the opening positions of the top of the straight tube correspond to the positions of the three-phase movable conductors.

[0004] Existing double-break disconnect switches capable of interlocking two isolation breaks require manual operation of a crane during the installation of the phase-to-phase transmission rod due to the special structural design of their movable conductors. The crane hook extends through a straight pipe at the top of the housing into the cavity, hooks the movable conductors that need adjustment inside the cavity, and adjusts the two movable conductors to the appropriate distance before installing the phase-to-phase transmission rod. This method is inefficient, labor-intensive, and affects the accuracy of the phase-to-phase distance. Furthermore, the adjustment process can easily cause the movable conductors to collide with the housing, damaging the insulation layer on the movable conductors and thus affecting the insulation performance between the movable conductors and the housing. Summary of the Invention

[0005] The purpose of this invention is to provide an assembly fixture for a GIS double-break disconnector switch, which solves the problem that when the distance between the two movable conductors is adjusted by manually operating a crane to install the transmission rod, the movable conductors are prone to collision with the housing and the installation efficiency is low.

[0006] To achieve the above objectives, the GIS double-break disconnector assembly fixture of the present invention adopts the following technical solution: A GIS double-break disconnector assembly fixture includes a bracket extending in a horizontal direction. The bracket includes a top mounting surface disposed on its top. The top mounting surface is provided with three sets of support seats at intervals along the length of the bracket for supporting and positioning the three-phase movable conductors. The three sets of support seats include one set of fixed support seats and two sets of movable support seats that can move along the arrangement direction of the support seats. The bracket can also be detachably mounted with a support part for supporting the disconnector housing.

[0007] Furthermore, the fixed support is located on the same side as the two sets of movable support.

[0008] Furthermore, the bracket and the three sets of support seats are provided with three sets of limiting structures at corresponding positions. The three sets of limiting structures include a set of stop limiting structures provided on the fixed support seat and the bracket to prevent the fixed support seat from moving, and two sets of movable limiting structures provided on the movable support seat and the bracket to limit the moving distance of the movable support seat.

[0009] Furthermore, the stop and limit structure is a limit hole provided on the fixed support and bracket for the limit rod to pass through and to stop and cooperate with the limit rod. The movable limit structure is a limit hole provided on the movable support for the limit rod to pass through and a limit groove provided on the bracket for the limit rod to pass through and cooperate with the limit rod to move the movable support by a limited distance.

[0010] Furthermore, the bracket also includes a slide rail extending along the arrangement direction of the support base at its top, the top surface of the slide rail being the top mounting surface, and both the movable support base and the fixed support base having support sliders for cooperating with the slide rail.

[0011] Furthermore, each of the three sets of support bases has a switch avoidance opening at its center to avoid the grounding switch.

[0012] Furthermore, each of the three sets of support bases also includes a friction-reducing pad located on the top of the support plate to prevent the support plate from rubbing and scratching the bottom surface of the movable conductor.

[0013] Furthermore, the bracket also includes a U-shaped limiting groove vertically disposed on its top mounting surface, and the support part is a long strip-shaped support block, one side of which is fitted into the U-shaped limiting groove.

[0014] Furthermore, the support is a three-dimensional frame structure, including an upper planar frame and a lower planar frame arranged parallel to it in the vertical direction, and also includes a vertical support beam disposed between the upper and lower frames. The upper planar frame includes two horizontal beams spaced apart along the length of the support and a longitudinal beam disposed between the horizontal beams.

[0015] Beneficial Effects: The GIS double-break disconnector assembly fixture of the present invention is a pioneering invention. Specifically, it includes a bracket, the top of which is provided with three sets of support seats for supporting and positioning the three-phase movable conductors. The three sets of support seats include one set of fixed support seats and two sets of movable support seats that can move along the arrangement direction of the support seats. A support portion for supporting the disconnector switch housing can also be detachably installed on the bracket. During assembly, the three-phase movable conductors are fixed to the three sets of support seats respectively. By pushing the movable support seats to move, the distance between two phase movable conductors can be adjusted. This adjustment method is more convenient, and the movable support seats are more stable when moving, avoiding collisions between the movable conductors and the housing during assembly. This solves the problem of low installation efficiency and easy collisions between the movable conductors and the housing when adjusting the distance between two phase movable conductors using a manually operated crane to install the transmission rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the GIS double-break disconnector assembly tooling of the present invention, in which limit rods are inserted at three sets of limit structures; Figure 2 for Figure 1 Top view of the assembly fixture for the double-break disconnector switch of China GIS; Figure 3 for Figure 2 Top view after removing the three sets of support bases and support blocks; Figure 4 for Figure 1 Schematic diagram of the middle slide rail and split support slider; Figure 5 for Figure 1 Schematic diagram of the middle support plate; Figure 6 for Figure 1 Schematic diagram of the structure of the wear-reducing pad; Figure 7 for Figure 1 A partial enlarged view of the middle support block being fitted into the U-shaped limiting groove; Figure 8 for Figure 1 Schematic diagram of the middle limit rod; Figure 9 This is a schematic diagram of the GIS double-break disconnector assembly fixture of the present invention used for assembling disconnectors.

[0017] In the diagram: 1. Bracket; 111. Vertical support beam; 112. Horizontal beam; 113. Longitudinal beam; 2. Top mounting surface; 3. Support base; 31. Fixed support base; 32. Movable support base; 33. Support slider; 331. Split support slider; 34. Support plate; 35. Mounting hole; 4. Support part; 41. Support block; 42. Track clearance notch; 5. Slide rail; 6. Limiting structure; 61. Stopping and limiting structure; 62. 1. Movable limiting structure; 8. Limiting hole; 9. Limiting groove; 10. Support plate; 102. Anti-friction pad; 103. Connecting hole; 104. Stepped hole; 11. Switch clearance opening; 110. Rectangular opening; 12. U-shaped limiting groove; 13. Switch housing; 14. Limiting rod; 15. Fixed threaded hole; 16. Mounting threaded hole; 17. Movable conductor; 18. Mounting through hole; 19. Support component; 20. Transmission rod. Detailed Implementation

[0018] This invention provides two sets of sliding movable support seats and one set of fixed support seats on the top mounting surface of the bracket. A support part for supporting the switch housing is detachably installed on the top mounting surface. During installation, the movable conductor of one phase is fixed to the fixed support seat, and then the movable conductors of the other two phases are fixed to the two sets of movable support seats. The switch housing is then supported by the support part to avoid interfering with the movement of the movable conductors. By moving the movable support seats, the movable conductors of the two phases are adjusted to a suitable distance, completing the installation of the phase transmission rod. Then, the support part is removed, and the mounting holes on the housing are aligned with the mounting holes of the bottom support parts of each phase movable conductor. Finally, the movable conductors are fixed to the housing by threaded fastening.

[0019] Based on the above concept, the GIS double-break disconnector assembly fixture of the present invention includes a bracket 1 extending in a horizontal direction. The bracket 1 includes a top mounting surface 2 disposed on its top. The top mounting surface 2 is provided with three sets of support seats 3 for positioning and supporting the three-phase movable conductors at intervals along the length direction of the bracket 1. The three sets of support seats 3 include a set of fixed support seats 31 and two sets of movable support seats 32 that can move along the arrangement direction of the support seats. A support part 4 for supporting the disconnector housing can also be detachably installed on the top mounting surface 2.

[0020] During installation, the movable conductor of one phase is fixed to the fixed support 31, and the movable conductors of the other two phases are fixed to the two sets of movable support 32 respectively. The switch housing is then supported by the support 4 to prevent it from interfering with the movement of the movable conductors. The movable conductors of adjacent phases are adjusted to a suitable distance by using the movable support 32 to complete the installation of the phase transmission rod. Then, the support 4 is removed, and the mounting holes on the housing are aligned with the mounting holes of the bottom support components of each phase movable conductor. The movable conductors are then fixed to the housing by threaded fastening.

[0021] like Figure 1-2 As shown, in order to facilitate the sequential adjustment of the distance between adjacent movable conductors during assembly, in a preferred embodiment, a fixed support 31 is located on the same side of two sets of movable support 32. During installation, one movable conductor is fixed to the fixed support 31 located at one end of the bracket, and then the movable support 32 with an adjacent movable conductor is slidably installed. The two movable conductors are adjusted to a suitable distance, and then the transmission rod between the two adjacent phases is installed. The second phase is kept stationary, and then the movable support 32 with a third movable conductor is slidably installed to a suitable distance. Finally, the transmission rod between the second and third phases is installed.

[0022] Three sets of limiting structures 6 are provided at the corresponding positions of the bracket 1 and the three sets of support seats 3. The three sets of limiting structures 6 include a set of stop limiting structures 61 set on the fixed support seat 31 and the bracket 1 to prevent the fixed support seat 31 from sliding, and two sets of movable limiting structures 62 set on the movable support seat 32 and the bracket 1 to limit the sliding distance of the movable support seat 32.

[0023] The stop and limit structure 61 is a limit hole 8 provided on the fixed support 31 and the bracket 1 for the limit rod 7 to pass through and to stop and cooperate with the limit rod 7. By passing the limit rod through the limit hole 8 on the fixed support 31 and the bracket, the fixed support 31 can be fixed on the bracket 1. In other embodiments, the stop and limit structure 61 can also be a blocking block provided on both sides of the fixed support 31. The blocking block can prevent the fixed support 31 from moving along the arrangement direction of the three sets of support seats.

[0024] like Figure 3 As shown, the movable limiting structure 62 consists of a limiting hole 8 on the movable support 32 for the limiting rod 7 to pass through, and a limiting groove 9 on the bracket 1 for cooperating with the limiting rod 7 to limit the sliding distance of the movable support 32. The limiting groove 9 extends along the direction of the three sets of support seats 3. By passing the limiting rod 7 through the limiting hole 8 on the movable limiting structure 62 and then inserting it into the limiting groove 9 on the bracket 1, the limiting rod 7 in the movable support 32 engages with the groove wall in the limiting groove 9 during the sliding process of the movable support 32, thereby limiting the movable support 32 to a certain sliding range. In other embodiments, the movable limiting structure 62 is a limiting block on both sides of the movable support 32, which can limit the movement of the movable support 32 by a limited distance.

[0025] The bracket 1 also includes a slide rail 5 extending along the length of the bracket 1 on its top mounting surface 2. The movable support 32 slides along the arrangement direction of the support 3 via the slide rail 5. The top surface of the slide rail 5 is the top support surface. Both the movable support 32 and the fixed support 31 have support sliders for cooperating with the slide rail 5. The three sets of support 3 each include a support slider 33 at the bottom of the support 3 and a support plate 34 at the top of the support slider 33. The movable support 3 slides along the slide rail via the support slider 33.

[0026] like Figure 4 As shown, the slide rail 5 is provided in two sets, arranged parallel to each other at intervals along the length of the top mounting surface 2. The support slider 33 of each set of support base 3 is a split block structure, including three split support sliders 331 with the same structure. The split support sliders 331 are arranged in an L-shape on two parallel slide rails. Each split support slider 331 is provided with a mounting hole 35 for mounting the support plate 34. The support plate 34 is also provided with mounting holes 35 for fixing the three split support sliders 331. The support plate 34 and the three split support sliders 331 are fixed to the support sliders 33 by threaded fasteners passing through the mounting holes 35 provided on the support plate 34 and the three split support sliders 331.

[0027] like Figure 5-6 As shown, each of the three sets of support bases 3 also includes a friction-reducing pad 102 located on the top of the support plate 34 to prevent the support plate 34 from rubbing and scratching the bottom surface of the movable conductor. The friction-reducing pad 102 is preferably a nylon plate, which completely covers the support plate 34. The switch clearance opening 11 is a rectangular opening 110 located at the center of the friction-reducing pad 102 and the support base 34. The support plate 34 and the friction-reducing pad 102 are provided with through holes for fixed connection at corresponding positions. The through holes include a connecting hole 103 on the support plate 34 and a countersunk hole 104 on the friction-reducing pad 102. The support plate 34 and the friction-reducing pad 102 are fixedly connected by threaded fasteners passing through the countersunk hole 104 and the connecting hole 103.

[0028] In the isolating grounding switch, in order to avoid the grounding switch, the center of each of the three sets of support bases 3 is provided with a switch avoidance opening 11 for avoiding the grounding switch. In other isolating switches without grounding switches, the switch avoidance opening 11 may not be provided.

[0029] like Figure 7As shown, the bracket 1 also includes a U-shaped limiting groove 12 vertically disposed at its top. The support part 4 is a long strip-shaped support block 41. One side of the support block 41 is fitted into the U-shaped limiting groove. If the support part 4 is detachably disposed at the track 5, the bottom of the support block 41 is provided with a track clearance notch 42 for avoiding the slide rail 5. The bottom surface of the support block 41 abuts against the top surface of the bracket, and one side of the support block 41 is fitted into the U-shaped limiting groove 12. In other embodiments, the support part 4 can also be a support stud with external threads. The bracket 1 is provided with a corresponding limiting threaded through hole. The support stud is screwed into the threaded through hole from the bottom of the bracket 1. The portion of the support stud reserved above the top support surface 2 is used to support the switch housing. When it is necessary to remove the support stud, the support stud can be screwed out from the bottom of the bracket 1.

[0030] The support frame 1 is a three-dimensional frame structure, including an upper planar frame and a lower planar frame arranged parallel to it in the vertical direction. It also includes a vertical support beam 111 disposed between the upper and lower frames. The upper planar frame includes two horizontal beams 112 spaced apart along the length of the support and a longitudinal beam 113 disposed between the horizontal beams 112. The plane formed by the upper surfaces of the horizontal beams 112 and the longitudinal beams 113 is the top mounting surface 2. In other embodiments, the support frame 1 may also be a planar frame structure welded together from parallel, spaced horizontal beams and longitudinal beams disposed between the horizontal beams.

[0031] like Figure 8 The diagram shows the structure of the limiting rod, one end of which has an external thread. The limiting rod used in this invention is an M20 or M16 limiting rod.

[0032] The specific assembly process is as follows: Figure 9 As shown, a crane is used to suspend the movable conductor of the first phase onto the fixed support, and the fixed threaded hole 15 on the bottom support member 19 of the movable conductor of the first phase is aligned with the limiting hole 8 on the fixed support 31. Then, an M20 limiting rod is passed from the bottom of the bracket 1 through the limiting holes 8 located on the bracket 1 and the fixed support 31 and screwed into the bottom support member 19 of the movable conductor 17, so that the movable conductor of the first phase is fixed on the fixed support 31. Then, a crane is used to suspend the movable conductor of the second phase onto the movable support 32, and the fixed threaded hole 15 on the bottom support member 19 of the movable conductor of the second phase is aligned with the limiting hole 8 on the movable support 32. Then, an M20 limiting rod is passed from the bottom of the bracket 1 through the limiting groove 9 located on the bracket and the limiting hole 8 on the fixed support 31 and screwed into the bottom support member 19 of the movable conductor. This operation is repeated to fix the movable conductor of the third phase onto the corresponding movable support 32.

[0033] Then, the support block 41 is fitted into the U-shaped limiting groove 12. A crane is used to lift the switch housing above the three-phase movable conductor. The lowering position of the switch housing 13 is determined, and then the switch housing 13 is slowly lowered onto the support block 41. After confirming that the housing is stable, the crane rope is removed. Note that the switch housing 13 should be lowered slowly to prevent it from colliding with the movable conductor.

[0034] Move the second and third phase movable conductors away from the first phase movable conductor to the maximum limited distance. Then, the operator installs the transmission rod 20 between the first and second phases through the window of the switch housing. During installation, push the second phase movable conductor to move it closer to the first phase movable conductor to a suitable distance to complete the installation of the first and second phase transmission rods 20. Then, pass the M16 limit rod through the mounting through hole on the second phase movable conductor support component and initially screw it into the corresponding mounting thread hole 16 in the housing to fix the position of the middle phase movable conductor.

[0035] Following the same method described above, the third-phase movable conductor is moved to a suitable distance closer to the second-phase movable conductor. Then, the installation of the second and third-phase transmission rods is completed. The limit rod of M16 is then passed through the mounting through hole 18 on the support component of the third-phase movable conductor and initially screwed into the corresponding mounting thread hole 16 in the switch housing 13, thus fixing the position of the third movable conductor.

[0036] Finally, a crane is used to slowly lift the switch housing 13, remove the support block 10, and then slowly place the switch housing 13 onto the support component 19 of the movable conductor. The M16 limit rod is removed, and then the movable conductor 17 is connected and fixed to the switch housing 13 by connecting bolts, thus completing the assembly of the disconnect switch.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A GIS double-break disconnector assembly fixture, characterized in that, The bracket includes a horizontally extending support, which includes a top mounting surface disposed on its top. The top mounting surface is provided with three sets of support seats at intervals along the length of the bracket for supporting and positioning the three-phase movable conductors. The three sets of support seats include one set of fixed support seats and two sets of movable support seats that can move along the arrangement direction of the support seats. The bracket can also be detachably mounted with a support part for supporting the housing of the disconnect switch.

2. The GIS double-break disconnector assembly fixture according to claim 1, characterized in that, The fixed support is located on the same side as the two sets of movable support.

3. The GIS double-break disconnector assembly fixture according to claim 1, characterized in that, The bracket and the three sets of support seats are provided with three sets of limiting structures at corresponding positions. The three sets of limiting structures include a set of stop limiting structures set on the fixed support seat and the bracket to prevent the fixed support seat from moving, and two sets of movable limiting structures set on the movable support seat and the bracket to limit the moving distance of the movable support seat.

4. The GIS double-break disconnector assembly fixture according to claim 3, characterized in that, The stop and limit structure is a limit hole provided on the fixed support and bracket for the limit rod to pass through and to stop and cooperate with the limit rod. The movable limit structure is a limit hole provided on the movable support for the limit rod to pass through and a limit groove provided on the bracket for the limit rod to pass through and cooperate with the limit rod to move the movable support by a limited distance.

5. The GIS double-break disconnector assembly fixture according to claim 1, characterized in that, The bracket also includes a slide rail extending along the arrangement direction of the support base at its top, the top surface of the slide rail being the top mounting surface, and both the movable support base and the fixed support base having support sliders for cooperating with the slide rail.

6. The GIS double-break disconnector assembly fixture according to claim 5, characterized in that, The three sets of support bases are each provided with a switch avoidance opening at the center to avoid the grounding switch.

7. The GIS double-break disconnector assembly fixture according to claim 6, characterized in that, The three sets of support bases also include friction-reducing pads on their tops.

8. The GIS double-break disconnector assembly fixture according to any one of claims 1-7, characterized in that, The bracket also includes a U-shaped limiting groove vertically disposed on its top mounting surface, and the support part is a long strip-shaped support block, one side of which is fitted into the U-shaped limiting groove.

9. The GIS double-break disconnector assembly fixture according to any one of claims 1-7, characterized in that, The support is a three-dimensional frame structure, including an upper planar frame and a lower planar frame arranged parallel to it in the vertical direction, and also includes a vertical support beam disposed between the upper and lower planar frames. The upper planar frame includes two horizontal beams spaced apart along the length of the support and a longitudinal beam disposed between the horizontal beams.

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