Auxiliary grounding switch device

Abstract

The invention discloses an auxiliary grounding switch device which is arranged on a double-fracture isolation switch body. A movable end part of the double-fracture disconnecting switch body is connected with a cover plate of the double-fracture disconnecting switch body through a movable end insulator, the movable end insulator is of a hollow structure, an in-out notch is formed in the side wall of the movable end insulator, and an operation opening is formed in a shell of the double-fracture disconnecting switch body. The auxiliary grounding switch device comprises a grounding moving contact, a grounding contact seat and a transmission shaft, the grounding contact seat is fixedly arranged in a shell of the double-fracture isolation switch body and is opposite to the moving end insulator, the grounding moving contact is rotatably connected with the grounding contact seat, the grounding moving contact movably enters and exits from the moving end insulator through an in-out notch, and the transmission shaft is connected with the transmission shaft. The connecting end of the transmission shaft is connected with the rotating center of the grounding moving contact, the transmission shaft penetrates through the operation opening, and the operation end of the transmission shaft is located outside the shell. According to the invention, the height of the double-fracture isolation switch can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of double-break disconnectors, and in particular to an auxiliary grounding switch device for double-break disconnectors. Background Art

[0002] With the advancement of power technology and the development of the national economy, GIS products (gas-insulated metal-enclosed switchgear) have been increasingly used in the market due to their advantages such as small footprint, low operating failure rate, light weight, and maintenance-free. At the same time, the power outage problem of GIS products in the later stage of engineering expansion has become increasingly prominent.

[0003] To solve the problem of power outages during substation expansion, double-break disconnectors came into being; double-break disconnectors replace traditional GIS standby bus disconnectors, which can achieve the effect of running the busbar without stopping during subsequent interval expansion. Considering the safe expansion, in addition to configuring a grounding switch at the expansion end, an auxiliary grounding switch will be set between the two disconnectors to play a double insurance role.

[0004] After the double-break disconnector is put into operation, the auxiliary earthing switch is only closed and opened during expansion. To prevent misoperation, the electric mechanism is not configured and manual operation is adopted instead. Conventional auxiliary earthing switches are generally arranged separately from the moving end insulator supporting the moving end conductor of the double-break disconnector. The auxiliary earthing switch and the moving end insulator are arranged opposite to each other up and down. This structure leads to a large height of the double-break disconnector, which increases the installation space of the double-break disconnector and increases the construction requirements.

[0005] In view of the above problems, it is necessary to study an auxiliary grounding switch device for a double-break disconnector, which can effectively reduce the height of the double-break disconnector. Summary of the invention

[0006] The object of the present invention is to provide an auxiliary grounding switch device for a double-break disconnector, which can effectively reduce the height of the double-break disconnector.

[0007] In order to achieve the above object, the solution of the present invention is: An auxiliary grounding switch device is arranged on a double-break isolating switch body; the moving end component of the double-break isolating switch body is connected to the cover plate of the double-break isolating switch body through a moving end insulator, the cover plate is fixed to the cover plate mounting opening of the shell of the double-break isolating switch body, the moving end insulator is a hollow structure and the side wall of the moving end insulator is provided with an entry and exit notch, and the shell is provided with an operating opening; the auxiliary grounding switch device comprises a grounding moving contact, a grounding contact seat and a transmission shaft, the grounding contact seat is fixedly arranged in the shell of the double-break isolating switch body and is opposite to the moving end insulator, the grounding moving contact is rotatably connected to the grounding contact seat, the grounding moving contact moves in and out of the moving end insulator through the entry and exit notch, and the grounding moving contact is movably connected to the moving end component, the connecting end of the transmission shaft is connected to the rotation center of the grounding moving contact, the transmission shaft passes through the operating opening and the operating end of the transmission shaft is located outside the shell.

[0008] The moving end insulator is connected to the cover plate through a support seat, the support seat is arranged around the grounding contact seat, and the support seat is provided with a clearance hole and an avoidance gap; the transmission shaft passes through the clearance hole of the support seat, and the grounding moving contact moves through the avoidance gap.

[0009] The movable end insulator is connected to the movable end component through a conductive seat; the conductive seat is provided with a conductive through slot for the movable grounding contact to be inserted movably, and a first strap contact finger movably contacting the movable grounding contact is provided in the conductive through slot.

[0010] A closing positioning piece movably abutting against the grounding moving contact is provided on one side of the conductive through slot away from the inlet and outlet notch.

[0011] The grounding contact seat is fixedly connected to the cover plate.

[0012] The grounding contact seat is provided with a rotation connection channel, and the connection end of the transmission shaft is inserted into the rotation connection channel.

[0013] The grounding contact seat is provided with a contact through slot for the grounding movable contact to move, and a second band contact finger in contact with the grounding movable contact is provided in the contact through slot.

[0014] The rotating connection channel is equipped with an oil-free bearing connected to the transmission shaft.

[0015] The operating port is matched with a connecting bearing connected to the transmission shaft.

[0016] A sealing ring is arranged between the connecting bearing, the transmission shaft and the operating port.

[0017] After adopting the above scheme, the present invention arranges the auxiliary grounding switch device to overlap partially with the moving end insulator (that is, the grounding moving contact can overlap with the moving end insulator), which can help reduce the space occupied by the auxiliary grounding switch device, thereby effectively reducing the height of the double-break disconnector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the present invention in the grounding state.

[0020] Figure 3 It is a schematic diagram of the present invention in the grounding and disconnecting state.

[0021] Figure 4 It is a schematic structural diagram of the moving end insulator of the present invention.

[0022] Description of labels: Double break disconnector body 1, Shell 11, cover plate installation opening 111, operation opening 112, The moving end part 12, Cover plate 13, Moving end insulator 14, inlet and outlet notch 141, Support seat 15, clearance hole 151, avoidance gap 152, Conductive seat 16, conductive slot 161, first strap contact finger 1611, Closing positioner 17, Auxiliary earthing switch device 2, Ground moving contact 21, The ground contact seat 22, the rotation connection channel 221, the oil-free bearing 2211, the contact slot 222, the second band contact finger 2221, Transmission shaft 23, connection end 231, operation end 232, Connect the bearing 3. DETAILED DESCRIPTION

[0023] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0024] like Figures 1 to 4As shown, the present invention discloses an auxiliary grounding switch device, which is arranged on a double-break disconnector body 1, wherein a moving end component 12 of the double-break disconnector body 1 is connected to a cover plate 13 of the double-break disconnector body 1 through a moving end insulator 14, and the cover plate 13 is fixed to a cover plate mounting opening 111 of a shell 11 of the double-break disconnector body 1, the moving end insulator 14 is a hollow structure, and a side wall of the moving end insulator 14 is provided with an inlet and outlet notch 141, and the shell 11 is provided with an operating opening 112; the auxiliary grounding switch device 2 comprises a grounding moving contact 21, a grounding contact seat 22 and a transmission The shaft 23 and the grounding contact seat 22 are fixedly arranged in the shell 11 of the double-break disconnector body 1 and are opposite to the moving end insulator 14. The grounding moving contact 21 is rotatably connected to the grounding contact seat 22. The grounding moving contact 21 moves in and out of the moving end insulator 14 through the entry and exit notch 141, and the grounding moving contact 21 is movably connected to the moving end component 12. The connecting end 231 of the transmission shaft 23 is connected to the rotation center of the grounding moving contact 21. The transmission shaft 23 passes through the operating port 112. The operating end 232 of the transmission shaft 23 is located outside the shell 11 so that the operator can rotate the transmission shaft 23.

[0025] The working principle of the present invention is as follows: when the double-break disconnector needs to be grounded, the operator rotates the transmission shaft 23 to drive the grounding moving contact 21 to rotate to the grounding closing position, so that the grounding moving contact 21 is connected to the moving end component 12, that is, the grounding closing is achieved; and when the double-break disconnector needs to be released from grounding, the operator rotates the transmission shaft 23 to drive the grounding moving contact 21 to rotate to the grounding opening position, so that the grounding moving contact 21 is not connected to the moving end component 12, that is, the grounding opening is achieved.

[0026] In an embodiment of the present invention, the moving end insulator 14 is connected to the cover plate 13 through a support seat 15, and the support seat 15 can be respectively connected to the cover plate 13 and the moving end insulator 14 by bolts; the support seat 15 is arranged around the grounding contact seat 22, and the support seat 15 is provided with a make way hole 151 to make way for the transmission shaft 23, and the transmission shaft 23 passes through the make way hole 151 of the support seat 15; the support seat 15 is also provided with an avoidance gap 152 to make way for the grounding moving contact 21, and the grounding moving contact 21 moves through the avoidance gap 152.

[0027] In the embodiment of the present invention, the movable end insulator 14 is connected to the movable end component 12 through the conductive seat 16, and the conductive seat 16 can be connected to the movable end insulator 14 and the movable end component 12 through bolts; the conductive seat 16 is provided with a conductive groove 161 for the movable insertion of the grounding movable contact 21, and the conductive groove 161 is provided with a first strap contact finger 1611 that is in movable contact with the grounding movable contact 21, and the grounding movable contact 21 is in movable contact with the first strap contact finger 1611 to achieve movable conduction with the movable end component 12. Among them, a closing positioner 17 that is movably against the grounding movable contact 21 is provided on one side of the conductive groove 161 away from the inlet and outlet notch 141, and the closing positioner 17 is used to limit the grounding movable contact 21 to the grounding closing position to prevent the grounding movable contact 21 from rotating excessively and hitting the movable end insulator 14.

[0028] In the embodiment of the present invention, the grounding contact seat 22 is fixedly connected to the cover plate 13, and the grounding contact seat 22 can be locked with the cover plate 13 by bolts. The grounding contact seat 22 is provided with a rotating connection channel 221, and the connecting end 231 of the transmission shaft 23 is inserted into the rotating connection channel 221 so that the grounding moving contact 21 is rotatably connected with the grounding contact seat 22 through the transmission shaft 23. The rotating connection channel 221 cooperates with the oil-free bearing 2211 connected with the transmission shaft 23 so that the transmission shaft 23 rotates smoothly. The grounding contact seat 22 is also provided with a contact slot 222 for the grounding moving contact 21 to move. The contact slot 222 is connected with the rotating connection channel 221, and a second strap contact finger 2221 that contacts the grounding moving contact 21 is provided in the contact slot 222 so that the grounding moving contact 21 is connected with the grounding contact seat 22.

[0029] In the embodiment of the present invention, the end of the ground movable contact 21 has a chamfer so that the ground movable contact 21 can move smoothly in the conductive through groove 161 and the contact through groove 222 .

[0030] In the embodiment of the present invention, the operating port 112 of the housing 11 is matched with a connecting bearing 3 connected to the transmission shaft 23, so that the transmission shaft 23 can rotate smoothly; a sealing ring (not shown) is provided between the connecting bearing 3, the transmission shaft 23 and the operating port 112 to prevent air leakage. In addition, the housing 11 can be marked corresponding to the grounding closing position and the grounding opening position, so as to quickly perform the grounding closing and grounding opening.

[0031] In summary, the present invention partially overlaps the auxiliary grounding switch device 2 with the moving end insulator 14 (that is, the moving grounding contact 21 can overlap with the moving end insulator 14), which can help reduce the space occupied by the auxiliary grounding switch device 2, thereby effectively reducing the height of the double-break disconnector.

[0032] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An auxiliary grounding switch device, which is arranged on a double-break disconnector body, is characterized in that: The moving end part of the double-break disconnector body is connected to the cover plate of the double-break disconnector body through the moving end insulator, the cover plate is fixed to the cover plate installation opening of the shell of the double-break disconnector body, the moving end insulator is a hollow structure, and the side wall of the moving end insulator is provided with an inlet and outlet notch, and the shell is provided with an operation opening; The auxiliary grounding switch device includes a grounding moving contact, a grounding contact seat and a transmission shaft. The grounding contact seat is fixedly arranged in the shell of the double-break isolating switch body and is opposite to the moving end insulator. The grounding moving contact is rotatably connected to the grounding contact seat. The grounding moving contact moves in and out of the moving end insulator through the entry and exit notch, and the grounding moving contact is movably connected to the moving end component. The connecting end of the transmission shaft is connected to the rotation center of the grounding moving contact, and the transmission shaft passes through the operating port and the operating end of the transmission shaft is located outside the shell.

2. The auxiliary grounding switch device according to claim 1, characterized in that: The moving end insulator is connected to the cover plate through a support seat, the support seat is arranged around the grounding contact seat, and the support seat is provided with a clearance hole and an avoidance gap; The transmission shaft passes through the escape hole of the support seat, and the grounding moving contact moves through the escape gap.

3. The auxiliary grounding switch device according to claim 1, characterized in that: The movable end insulator is connected to the movable end component through a conductive seat; the conductive seat is provided with a conductive through slot for the movable grounding contact to be inserted movably, and a first strap contact finger movably contacting the movable grounding contact is provided in the conductive through slot.

4. The auxiliary grounding switch device according to claim 3, characterized in that: A closing positioning piece movably abutting against the grounding moving contact is provided on one side of the conductive through slot away from the inlet and outlet notch.

5. The auxiliary grounding switch device according to claim 1, characterized in that: The grounding contact seat is fixedly connected to the cover plate.

6. The auxiliary grounding switch device according to claim 1, characterized in that: The grounding contact seat is provided with a rotation connection channel, and the connection end of the transmission shaft is inserted into the rotation connection channel.

7. The auxiliary grounding switch device according to claim 6, characterized in that: The grounding contact seat is provided with a contact through slot for the grounding movable contact to move, and a second band contact finger in contact with the grounding movable contact is provided in the contact through slot.

8. The auxiliary grounding switch device according to claim 6, characterized in that: The rotating connection channel is equipped with an oil-free bearing connected to the transmission shaft.

9. The auxiliary grounding switch device according to claim 1, characterized in that: The operating port is matched with a connecting bearing connected to the transmission shaft.

10. The auxiliary grounding switch device according to claim 9, characterized in that: A sealing ring is arranged between the connecting bearing, the transmission shaft and the operating port.

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