An assembly jig for on-off contacts of a common-box GIS rapid grounding switch

Abstract

This utility model discloses an assembly fixture for the opening and closing contacts of a common-enclosure GIS fast grounding switch, comprising a U-shaped bracket, three nylon sleeves, and a plurality of positioning pins. The three nylon sleeves are fixed to the base plate of the U-shaped bracket and are arranged separately along the transverse axis of the base plate, with the axis of the inner hole of the nylon sleeves arranged vertically. The top of each of the two side plates of the U-shaped bracket includes a flange extending outwards laterally, and the plurality of positioning pins are respectively fixed to the corresponding flange. The axis of the positioning pins is arranged vertically, and the pins of the positioning pins extend upwards from the top surface of the flange. This assembly fixture facilitates the alignment and adjustment of the moving contact and the contact seat, and can improve the assembly efficiency of the common-enclosure GIS fast grounding switch.

Description

Technical Field

[0001] This utility model relates to a common-enclosure GIS fast grounding switch, and more particularly to an assembly fixture for the opening and closing contacts of a common-enclosure GIS fast grounding switch. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) is an important control and protection device in power systems.

[0003] Fast grounding switches are an important component of gas-insulated metal-enclosed switchgear. During operation, fast grounding switches use a connecting rod to push the moving contact into the contact seat to achieve grounding protection.

[0004] like Figures 4 to 7 As shown, the grounding contact 52 of the common-box GIS fast grounding switch 200 is installed in the inner cavity of the upper housing 40 through the grounding contact bracket 53. The moving contact 51 is installed in the inner hole of the grounding contact 52 and slides with the grounding contact 52. The moving contact 51 is driven by the operating mechanism, which consists of a fast grounding opening and closing mechanism 61 and a crank connecting rod mechanism 62 located outside the upper housing 40, and a rotating shaft 63, a transmission crank arm 64, and a connecting rod 65 located inside the upper housing 40. The contact seat that mates with the moving contact 51 is installed in the lower housing (the contact seat and lower housing are not shown in the figure). During the operation of the fast grounding switch, the moving contact 51 is pushed into the contact seat by the connecting rod 65 to achieve grounding protection. Poor alignment between the moving contact 51 and the contact seat will result in uneven contact between the moving contact 51 and the stylus fingers in the contact seat, and severe wear on the silver-plated surface of the moving contact 51, which will seriously reduce the grounding performance and service life. Because the moving contact 51 and the contact base are installed in the upper housing 40 and the lower housing respectively, it is difficult to align the moving contact 51 and the contact base during manual installation of the common-box GIS fast grounding switch. The alignment effect of the moving contact 51 and the contact base is not good, resulting in low assembly efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an assembly fixture for the opening and closing contacts of a common-box GIS fast grounding switch that facilitates the alignment of the moving contact with the contact seat and improves assembly efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is an assembly fixture for the opening and closing contacts of a common-box type GIS fast grounding switch, including a U-shaped bracket, three nylon sleeves and a plurality of positioning pins. The three nylon sleeves are fixed to the base plate of the U-shaped bracket and are arranged separately along the transverse axis of the base plate, with the axis of the inner hole of the nylon sleeve arranged vertically. The top of each of the two side plates of the U-shaped bracket includes a flange extending outward in a transverse direction, and the plurality of positioning pins are respectively fixed on the corresponding flange. The axis of the positioning pin is arranged vertically, and the pin of the positioning pin extends upward from the top surface of the flange.

[0007] The assembly fixture described above includes four positioning pins. The four positioning pins are divided into two groups and fixed on corresponding flanges respectively. The two positioning pins on the same flange are arranged separately along the longitudinal direction.

[0008] The assembly fixture described above has a U-shaped bracket base plate with three mounting holes for nylon sleeves. The lower end of the nylon sleeve includes an annular flange. The nylon sleeve passes through the corresponding mounting holes from bottom to top, and the annular flange of the nylon sleeve abuts against the bottom surface of the base plate. The annular flange includes a plurality of screw holes. The base plate has threaded holes corresponding to the screw holes around the mounting holes. A plurality of screws pass through the corresponding screw holes and are screwed into the corresponding threaded holes to fix the nylon sleeve to the base plate of the U-shaped bracket.

[0009] The assembly fixture described above has an inner hole in which the moving contact 51 of the common-box GIS fast grounding switch slides into contact with the nylon sleeve.

[0010] The assembly fixture described above has a flange with two fixing holes for locating pins, and the lower part of the locating pins is tightly fitted with the fixing holes.

[0011] The assembly fixture described above has a locating pin with a tapered surface that is smaller at the top and larger at the bottom, and the tapered angle of the tapered surface is 15° to 25°.

[0012] The assembly fixture described above has a slidable engagement between the positioning pin and the screw hole on the bottom surface of the upper housing of the common-box GIS fast grounding switch.

[0013] The assembly fixture of this utility model facilitates the alignment and adjustment of the moving contact and the contact seat, which can improve the assembly efficiency of the common-box GIS fast grounding switch. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a front view of the assembly fixture for the opening and closing contacts of the common-box type GIS fast grounding switch according to an embodiment of this utility model.

[0016] Figure 2This is a top view of the assembly fixture for the opening and closing contacts of the common-box type GIS fast grounding switch according to an embodiment of this utility model.

[0017] Figure 3 This is a side view of the assembly fixture for the opening and closing contacts of the common-box type GIS fast grounding switch according to an embodiment of this utility model.

[0018] Figure 4 This is a front view of the upper structure of the common-box type GIS fast grounding switch of this utility model, with the fixture installed.

[0019] Figure 5 This is a cross-sectional view of the upper structure of the common-box type GIS fast grounding switch according to an embodiment of this utility model.

[0020] Figure 6 This is a cross-sectional view of the upper structure of the common-box type GIS fast grounding switch of this utility model, with the fixture installed.

[0021] Figure 7 This is a schematic diagram of the working state of the upper structure of the common box type GIS fast grounding switch equipped with this fixture, according to an embodiment of this utility model. Detailed Implementation

[0022] The structure and working principle of the assembly fixture for the opening and closing contacts of the common-box GIS fast grounding switch in this embodiment of the utility model are as follows: Figures 1 to 7 As shown.

[0023] like Figures 1 to 3 As shown, the assembly fixture for the opening and closing contacts of the common-box type GIS fast grounding switch in this embodiment of the utility model includes a U-shaped bracket 10, three nylon sleeves 20, and four positioning pins 30. The three nylon sleeves 20 are fixed to the base plate 11 of the U-shaped bracket 10 and are arranged separately along the transverse axis of the base plate 11, with the axis of the inner hole of the nylon sleeve 20 arranged vertically. The top of each of the two side plates 12 of the U-shaped bracket 10 includes a flange 13 extending outward in the transverse direction. The four positioning pins 30 are divided into two groups and fixed to the corresponding flanges 13. The axis of the positioning pins 30 is arranged vertically, and the two positioning pins 30 on the same flange 13 are arranged separately in the longitudinal direction. The pins 31 of the positioning pins 30 extend upward from the top surface of the flange 13.

[0024] The base plate 11 of the U-shaped bracket 10 includes three mounting holes 14 for nylon sleeves 20, and the lower end of the nylon sleeve 20 includes an annular flange 21. The nylon sleeve 20 passes through the corresponding mounting holes 14 from bottom to top, and the annular flange 21 of the nylon sleeve 20 abuts against the bottom surface of the base plate 11. The annular flange 21 includes three screw holes, and the base plate 11 includes three threaded holes around the mounting holes 14. Three screws 23 pass through the corresponding screw holes and are screwed into the corresponding threaded holes to fix the nylon sleeve 20 to the base plate 11 of the U-shaped bracket 10. The inner hole 22 of the nylon sleeve 20 is in sliding fit with the moving contact 51.

[0025] Each flange 13 has two fixing holes for locating pins 30, and the lower part of the locating pin 30 is tightly fitted with the fixing holes. The top of the pin 31 of the locating pin 30 has a conical surface 32 that is smaller at the top and larger at the bottom, and the cone angle of the conical surface 32 is 20°.

[0026] When assembling or adjusting the opening and closing contacts of the common-enclosure GIS fast grounding switch 200 in this embodiment of the utility model, first fix the assembly jig 100 on the workbench, and then loosen the fixing bolts 54 of the grounding contact bracket 53 appropriately in the assembled common-enclosure GIS fast grounding switch upper housing assembly. For example... Figure 4 As shown, the bottom surface of the connecting flange 41 at the lower part of the upper housing 40 of the common-enclosure GIS fast grounding switch 200 rests on the top surface of the flange 13 of the assembly fixture 100. The pins 31 of the four positioning pins 30 of the assembly fixture 100 are inserted into the screw holes 42 of the connecting flange 41 of the upper housing 40 of the common-enclosure GIS fast grounding switch. The pins 31 and the screw holes 42 of the connecting flange of the upper housing are in sliding fit, and the pins 31 can be easily inserted.

[0027] The manual operating mechanism is used to close the circuit breaker. The lower ends of the three moving contacts 51 are inserted into the three nylon sleeves 20 of the fixture 100. The operating mechanism is driven to rotate the three moving contacts 51 back and forth several times, allowing the moving contacts 51 to be smoothly and without resistance inserted and pulled out. Then, the fixing bolts 54 of the grounding contact bracket 53 are tightened to fix the position of the three grounding contacts 52. In this embodiment of the utility model, the assembly fixture 100 of the common box type GIS fast grounding switch utilizes the relative positional accuracy between the three nylon sleeves 20 to adjust the positional relationship between the three grounding contacts 52 and the three-phase moving contacts 51, so as to achieve precise docking between the moving contacts 51 and the contact seat.

[0028] The assembly fixture for the opening and closing contacts of the common-box type GIS fast grounding switch in this embodiment of the utility model has the following beneficial effects:

[0029] 1. High work efficiency. This fixture can simultaneously assemble and align three-phase moving contacts, improving assembly and alignment efficiency.

[0030] 2. The structure is simple. This fixture can be used by positioning it on the housing with positioning pins. It is simple to operate and easy to use.

[0031] 3. This fixture solves the problem of inconvenience and difficulty in centering and adjusting the moving contact in the narrow space inside the housing when assembling contacts in traditional assembly. It can realize the assembly of the moving contact with the lower housing component after centering.

Claims

1. An assembly fixture for the opening and closing contacts of a common-enclosure type GIS fast grounding switch, characterized in that, The device includes a U-shaped bracket, three nylon sleeves, and a plurality of positioning pins. The three nylon sleeves are fixed to the base plate of the U-shaped bracket and are arranged separately along the transverse axis of the base plate, with the axis of the inner hole of the nylon sleeves arranged vertically. The top of each of the two side plates of the U-shaped bracket includes a flange extending outward in a transverse direction, and the plurality of positioning pins are respectively fixed to the corresponding flange. The axis of the positioning pin is arranged vertically, and the pin of the positioning pin extends upward from the top surface of the flange.

2. The assembly fixture according to claim 1, characterized in that, It includes four positioning pins, which are divided into two groups and fixed on corresponding flanges respectively. The two positioning pins on the same flange are arranged separately along the longitudinal direction.

3. The assembly fixture according to claim 1, characterized in that, The base plate of the U-shaped bracket includes three mounting holes for nylon sleeves, and the lower end of the nylon sleeve includes an annular flange. The nylon sleeve passes through the corresponding mounting holes from bottom to top, and the annular flange of the nylon sleeve abuts against the bottom surface of the base plate. The annular flange includes a plurality of screw holes, and the base plate includes threaded holes corresponding to the screw holes around the mounting holes. A plurality of screws pass through the corresponding screw holes and are screwed into the corresponding threaded holes to fix the nylon sleeve to the base plate of the U-shaped bracket.

4. The assembly fixture according to claim 1, characterized in that, The inner hole of the nylon sleeve slides into contact with the moving contact of the common-box GIS fast grounding switch.

5. The assembly fixture according to claim 1, characterized in that, The flange includes two fixing holes for locating pins, with the lower part of the locating pins tightly fitted into the fixing holes.

6. The assembly fixture according to claim 1, characterized in that, The top of the locating pin includes a tapered surface that is smaller at the top and larger at the bottom, with a tapered angle of 15° to 25°.

7. The assembly fixture according to claim 1, characterized in that, The positioning pin slides into the screw hole on the bottom surface of the upper housing of the common-enclosure GIS fast grounding switch.

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