Isolation knife switch of power distribution network

Abstract

The utility model discloses a power distribution network isolation switch, which belongs to the technical field of power distribution networks and comprises a base, a substrate, a plurality of moving contacts and a plurality of static contacts, the moving contacts are arranged on the substrate, two guide sleeves are arranged on the inner wall of the base, guide columns corresponding to the guide sleeves are arranged on the substrate, and the guide columns are arranged on the substrate. An execution unit for driving the substrate to move is arranged between the base and the substrate, a plurality of partition plates are arranged in the base, the interior of the base is divided into a plurality of containing cavities through the partition plates, and the static contacts are located in the containing cavities respectively. The base plate can be remotely controlled to drive a plurality of moving contacts to start to move, so that a worker is prevented from directly contacting with electrified equipment, and the personal safety of the equipment is ensured.

Description

Technical Field

[0001] This utility model relates to a distribution network isolating switch, belonging to the field of distribution network technology. Background Art

[0002] The isolating switch in a distribution network is one of the commonly used electrical devices in a distribution network. Its main characteristic is that it has no arc-extinguishing capability and can only open and close circuits when there is no load current. Its main functions are: after opening, to establish a reliable insulation gap, isolating the equipment or line requiring maintenance from the power source with a clear disconnection point to ensure the safety of maintenance personnel and equipment; to disconnect and switch lines according to operational needs; and to switch low-current equipment in the line, such as bushings, busbars, short cables, and unloaded transformers of a certain capacity.

[0003] Currently, the maintenance of isolating switches is usually carried out manually. Especially after this type of isolating switch has been in operation for 5 to 6 years, due to its own design and corrosion and aging caused by the external environment, the temperature of the stationary contact shaft and the joint of the moving and stationary contacts generally rises, which may even cause the isolating switch to burn out. When maintenance is required, more preparation work is needed for the safety of the staff, which wastes a lot of time and poses certain safety hazards. Utility Model Content

[0004] This utility model provides a power distribution network isolating switch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Compared with the prior art, the present invention provides a power distribution network isolating switch, including a base, a base plate, multiple moving contacts and multiple stationary contacts. The moving contacts are all disposed on the base plate. Two guide sleeves are disposed on the inner wall of the base. Guide posts corresponding to the guide sleeves are disposed on the base plate. An execution unit for driving the base plate to move is disposed between the base and the base plate. Multiple partitions are disposed inside the base, dividing the interior of the base into multiple receiving cavities. The multiple stationary contacts are respectively located in the multiple receiving cavities.

[0007] Furthermore, the execution unit includes two threaded screws, one end of which passes through the base, guide sleeve, guide post and base plate respectively, and the other end of the two threaded screws is provided with a traction head. A connecting linear motor or linear gearbox for driving the traction head is provided on the base.

[0008] Furthermore, two reinforcing ribs are provided on one side of the substrate.

[0009] Furthermore, the moving contact is sleeved with the substrate, and a limiting seat is provided on one side of the substrate, the limiting seat being connected to the substrate by bolts.

[0010] Furthermore, both the moving contact and the stationary contact are provided with insulating seats, and the insulating seats are provided with gaskets on the sides that abut against the base or substrate. The gaskets include asbestos gaskets and ceramic gaskets, and the asbestos gaskets and ceramic gaskets are fixedly connected by contact screws using high-temperature resistant adhesive.

[0011] Furthermore, the partition is inclined, and a drainage hole is provided on the inner wall of the receiving cavity near the lowest point of the partition.

[0012] Furthermore, a grounding terminal is provided on one side of the substrate.

[0013] Furthermore, an insulating partition is provided between each of the two adjacent stationary contacts on the same side, and the insulating partition is connected to the base.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] When overhauling the isolating switch, the controller controls the execution unit to move the base plate and multiple moving contacts, separating the moving contacts from the stationary contacts until the base plate moves to a safe position, thereby achieving power disconnection. Then, the staff can climb up to replace or maintain the components on the isolating switch and remotely close the switch, avoiding direct contact between the staff and the live equipment and ensuring the safety of the equipment and personnel. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 for Figure 1 Structural side view;

[0019] Figure 3 This is a schematic diagram of the base structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the substrate structure of this utility model;

[0021] Figure 5This is a schematic diagram of the structure of the execution unit of this utility model;

[0022] Figure 6 This is a wireframe diagram of the guide column of this utility model.

[0023] In the diagram: 1. Base; 2. Guide sleeve; 3. Guide column; 4. Base plate; 5. Reinforcing rib; 6. Partition plate; 7. Moving contact; 8. Stationary contact; 9. Threaded screw; 10. Nut; 11. Traction head; 12. Insulating partition plate; 13. Drain hole; 14. Grounding terminal; 15. Fuse; 16. Nut holder. DETAILED DESCRIPTION

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 , the utility model provides a technical solution:

[0026] like Figure 1 and Figure 2 As shown, a power distribution network isolating switch includes a base 1, a base plate 4, multiple moving contacts 7 and multiple stationary contacts 8. A fuse 15 is provided between every two moving contacts 7. A grounding terminal 14 is provided on one side of the base plate 4. Two guide sleeves 2 are provided on the inner wall of the base 1. Guide posts 3 corresponding to the guide sleeves 2 are provided on the base plate 4. The guide sleeves 2 can guide the guide posts 3 on the base plate 4 and also enable quick positioning of the base plate 4 when it is replaced. An execution unit for driving the base plate 4 is provided between the base 1 and the base plate 4. The execution unit is controlled by a controller to make the base plate 4 drive the multiple moving contacts 7 to start moving, so that the moving contacts 7 separate from the stationary contacts 8 until the base plate 4 moves to a safe position, thereby realizing the power-off operation. Then, the staff can climb up to replace or maintain the components on the isolating switch and then remotely close the switch, avoiding the staff's direct contact with the live equipment and ensuring the safety of the equipment and personnel.

[0027] Furthermore, the moving contact 7 and the stationary contact 8 correspond one-to-one, and the moving contact 7 is disposed on the substrate 4, such as... Figure 3 As shown, the base 1 is provided with multiple partitions 6, which divide the interior of the base 1 into multiple accommodating cavities, and multiple stationary contacts 8 are located in the multiple accommodating cavities respectively.

[0028] Furthermore, the partition 6 is inclined, and a drainage hole 13 is provided on the side of the inner wall of the receiving cavity near the lowest point of the partition 6. When water accumulates in the receiving cavity during rainy weather, the water can be discharged through the drainage hole 13 to avoid short circuits. An insulating partition 12 is provided between two adjacent stationary contacts 8 on the same side. The insulating partition 12 is connected to the base 1, thereby preventing conductive materials from adhering to the stationary contacts 8 and causing short circuits.

[0029] like Figure 4 As shown, two reinforcing ribs 5 are provided on one side of the substrate 4, the moving contact 7 is sleeved with the substrate 4, and a limiting seat for restricting the movement of the moving contact 7 is provided on one side of the substrate 4. The limiting seat is connected to the substrate 4 by bolts.

[0030] Furthermore, both the moving contact 7 and the stationary contact 8 are provided with insulating seats, and gaskets are provided on the sides of the insulating seats that abut against the base 1 or the base plate 4. The gaskets include asbestos gaskets, and the asbestos gaskets are fixedly connected to the screw parts by high temperature resistance and glue. The insulating seat on the stationary contact 8 is connected to the base 1 by bolts.

[0031] like Figure 5 As shown, the execution unit includes two threaded screws 9. One end of each threaded screw 9 passes through the base 1, guide sleeve 2, guide post 3, and base plate 4 in sequence. The other end of each threaded screw 9 is provided with a traction head 11. Multiple nuts 10 are provided on the threaded screws 9. The multiple nuts 10 are used to fix the base 1 and base plate 4 respectively. When replacing the base plate 4, the base plate 4 and the moving contact 7 located on it can be removed by releasing the restriction of the nuts 10 on the base plate 4, or the moving contact 7 can be replaced separately by releasing the restriction of the upper limit seat of the moving contact 7 by the bolt. Then, the pre-drilled hole on the new base plate 4 is aligned with the threaded screw 9 and inserted to realize the maintenance and replacement work. The base 1 is provided with a connecting linear motor or linear gearbox for driving the traction head 11. In this embodiment, a linear gearbox is used to drive the traction head 11.

[0032] like Figure 6 As shown, the guide post 3 has a through hole for the threaded screw 9 to pass through. The cross-section of the through hole is an isosceles trapezoid. When the base plate 4 and the guide post 3 are fixed by the nut 10, the nut 10 moves in the through hole as the threaded screw 9 or the nut 10 is rotated until the nut 10 moves to the nut locking position 16 reserved in the through hole.

[0033] It should be noted that a signal receiver is installed on the base 1, which enables remote control of the linear motor or linear gearbox.

[0034] The workflow of this embodiment is as follows: When the isolating switch needs to be inspected or maintained, the operator uses the controller to remotely control the execution unit to move the base plate 4, causing multiple moving contacts 7 to separate from the stationary contacts 8, until the base plate 4 is moved to a safe position. Then, the operator uses a ladder to climb up and replace or maintain the components of the isolating switch, and then remotely closes the switch. This avoids direct contact between the operator and the live equipment, ensuring equipment and personal safety, and reducing the operator's operation time.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power distribution network isolating switch, comprising a base (1), a base plate (4), a plurality of moving contacts (7) and a plurality of stationary contacts (8), wherein the moving contacts (7) are all disposed on the base plate (4), characterized in that, Two guide sleeves (2) are provided on the inner wall of the base (1), and guide posts (3) corresponding to the guide sleeves (2) are provided on the base plate (4). An execution unit for driving the base plate (4) to move is provided between the base (1) and the base plate (4). Multiple partitions (6) are provided inside the base (1), and the interior of the base (1) is divided into multiple receiving cavities by the multiple partitions (6). Multiple stationary contacts (8) are located in the multiple receiving cavities respectively.

2. A distribution network isolating switch according to claim 1, characterized in that, The execution unit includes two threaded screws (9), one end of which passes through the base (1), guide sleeve (2), guide column (3) and base plate (4) respectively. The other end of the two threaded screws (9) is provided with a traction head (11). The base (1) is provided with a connecting linear motor or linear gearbox for driving the traction head (11).

3. A distribution network isolating switch according to claim 1, characterized in that, Two reinforcing ribs (5) are provided on one side of the substrate (4).

4. A distribution network isolating switch according to claim 1, characterized in that, The moving contact (7) is sleeved with the substrate (4), and a limiting seat is provided on one side of the substrate (4). The limiting seat is connected to the substrate (4) by bolts.

5. A distribution network isolating switch according to claim 1, characterized in that, Insulating seats are provided on both the moving contact (7) and the stationary contact (8). Gaskets are provided on the sides of the insulating seats that abut against the base (1) or the substrate (4). The gaskets include asbestos gaskets. The contact screws between the asbestos gaskets and the substrate (4) are fixedly connected by high-temperature resistant adhesive.

6. A distribution network isolating switch according to claim 1, characterized in that, The partition (6) is inclined, and a drain hole (13) is provided on the side of the inner wall of the receiving cavity near the lowest point of the partition (6).

7. A distribution network isolating switch according to claim 1, characterized in that, A grounding terminal (14) is provided on one side of the substrate (4).

8. A distribution network isolating switch according to claim 1, characterized in that, An insulating partition (12) is provided between two adjacent stationary contacts (8) on the same side, and the insulating partition (12) is connected to the base (1).

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