An outdoor groundable knife switch

Abstract

The present invention relates to an isolating knife switch, and more specifically, to an outdoor groundable knife switch, comprising a mounting base, two insulators mounted on the mounting base, a first contact piece and a second contact piece mounted on the insulators respectively, the first contact piece being mounted with a static contact, the second contact piece being rotatably connected with an isolating knife switch that can contact with the static contact, a grounding knife switch base being provided on the second contact piece, a grounding knife switch being detachably connected to the grounding knife switch base, and a grounding static contact that contacts with the grounding knife switch being provided on the mounting base. The grounding knife switch of the present invention can realize the operation of grounding the wire on the ground without the need for additionally installing a grounding device, thereby improving the operating efficiency and safety of the grounding wire. Compared with an isolating knife switch equipped with a grounding device, the grounding knife switch of the present invention has a small size, a simple structure, quick wiring and is easy to use.

Description

Technical Field

[0001] The invention relates to an isolating knife switch, and more particularly to an outdoor groundable knife switch. Background Art

[0002] According to the safety requirements of power construction and maintenance operations, the distribution network transformer rack and distribution lines can only be operated after they have been switched to maintenance status through safety measures such as power outage, power testing, and grounding. Power outage and power testing operations can usually be completed by operators standing on the ground, while grounding operations usually require climbing up the transformer rack or tower to operate, and high-altitude operations affect the safety and efficiency of the operation.

[0003] The patent document with application number "CN201820630423.5" discloses an isolating knife switch grounding device. By installing the device on the isolating knife switch, the staff only needs to disconnect the contact between the isolating knife switch and the static contact on the ground, and close the grounding device after opening the isolating knife switch to complete the grounding operation. However, the device needs to be installed at the original isolating knife switch, which increases the size of the isolating knife switch. At the same time, the grounding knife switch is also installed on the other two insulators, which has a complex structure, inconveniences in wiring and opening and closing the switch, and also affects the work efficiency. Summary of the invention

[0004] In order to overcome the problem that the installation of a grounding device in the above-mentioned prior art causes the isolating knife switch to be large in size and complex in structure, thereby affecting the operating efficiency, the present invention provides an outdoor groundable knife switch that can quickly complete the grounding wire operation without the need to install a grounding device, thereby shortening the grounding operation time and improving the operating efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an outdoor groundable knife switch, including a mounting base, two insulators installed on the mounting base, the insulators are respectively provided with a first contact piece and a second contact piece, the first contact piece is provided with a static contact, the second contact piece is rotatably connected to an isolating knife switch that can contact and close with the static contact, the second contact piece is provided with a grounding knife switch base, the grounding knife switch base is detachably connected with a grounding knife switch, and the mounting base is provided with a grounding static contact that contacts with the grounding knife switch.

[0006] Turn the isolating knife switch so that it does not touch the static contact, connect the grounding knife switch to the grounding knife switch base, and make the grounding knife switch touch the grounding static contact at the same time to complete the grounding wire operation.

[0007] Preferably, the grounding switch is mounted on the grounding switch base. The grounding switch base is provided with a hook, and the grounding switch is provided with a hanging rod matched with the hook. The hanging rod of the grounding switch is hung on the hook to complete the installation of the grounding switch, and then the grounding switch is contacted with the grounding static contact to complete the grounding wire operation, which is quick and simple.

[0008] Preferably, the cross section of the hanging rod is semicircular. This design can facilitate the grounding switch to be hung on the grounding switch base, and can ensure that the grounding switch is not easy to fall off the base when it is closed.

[0009] Preferably, round holes are provided at both ends of the grounding knife switch. When the grounding knife switch is hung into the grounding knife switch base or taken out from the grounding knife switch base, the ground operator can complete the operation by inserting the operating rod into the upper round hole. When the grounding knife switch is in the grounding knife switch base and needs to be closed or opened, the operation can be completed by inserting the insulating operating rod into the lower round hole. The staff can complete the disassembly, assembly, opening and closing of the grounding knife switch using the operating rod on the ground, which is easy to operate.

[0010] Preferably, the mounting base is provided with a grounding connection position. When the knife switch is used for connecting the three-phase power grid, the ground wire is connected to the grounding connection position, and the isolation knife switch can be directly connected in series to the stand or tower to ensure that the power-off line and equipment are well grounded when the maintenance state is entered.

[0011] Preferably, the isolation knife switch is provided with an anti-misoperation lever, and when the grounding knife switch is in contact with the grounding static contact, one end of the anti-misoperation lever is located on a side of the grounding knife switch close to the static contact. When the grounding knife switch is in the closed state, forcibly closing the isolation knife switch will cause the grounding knife switch to be pulled open, thereby avoiding the isolation knife switch and the grounding knife switch being in the closed position at the same time, thereby achieving the purpose of preventing misoperation.

[0012] Preferably, the isolating knife switch is provided with a mounting frame, and the anti-misoperation rod is installed on the mounting frame.

[0013] Preferably, the isolation knife switch includes two contact pieces and a pull ring arranged between the contact pieces, the second contact piece is provided with a mounting plate, one end of the two contact pieces is respectively arranged on both sides of the mounting plate and is rotatably connected to the second contact piece through a clamping mechanism, and the other end of the contact piece is connected to the pull ring through the clamping mechanism. Under the action of the clamping mechanism, the contact piece forms an elastic pressure on the static contact and the second contact piece, ensuring that the contact piece is in good contact with the static contact and the second contact piece. The pull ring is bolted to the moving contact to provide a force point for the pulling and closing operations of the knife switch.

[0014] Preferably, the clamping mechanism comprises a fastener (which may be a bolt or a nut) for connecting the contact piece and an elastic member (which may be a spring) for pressing the contact piece.

[0015] Compared with the prior art, the grounding switch of the present invention has the following beneficial effects: the grounding switch of the present invention can realize the operation of grounding wire on the ground without installing a grounding device, thereby improving the operation efficiency and safety of the grounding wire. Compared with the isolation switch with a grounding device, the grounding switch of the present invention has a small size, a simple structure, quick wiring and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an outdoor groundable knife switch of the present invention;

[0017] Figure 2 is a schematic structural diagram of a second contact piece of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the grounding switch of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the isolation knife switch of the present invention.

[0020] Among them: 1. Installation base; 101. Grounding connection position; 2. Insulator; 3. First contact piece; 4. Second contact piece; 5. Static contact; 6. Isolating knife switch; 601. Anti-misoperation lever; 602. Mounting frame; 603. Contact piece; 604. Pull ring; 605. Bolt; 606. Nut; 607. Spring; 7. Grounding knife switch base; 701. Hook; 8. Grounding knife switch; 801. Hanging rod; 802. Round hole; 9. Grounding static contact. DETAILED DESCRIPTION

[0021] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0022] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Example 1

[0025] like Figure 1 The figure shows an embodiment of an outdoor grounding knife switch, which includes a mounting base 1, two insulators 2 mounted on the mounting base 1, a first contact piece 3 and a second contact piece 4 mounted on the insulator 2, a static contact 5 mounted on the first contact piece 3, an isolating knife switch 6 rotatably connected to the second contact piece 4, and the isolating knife switch 6 can be in contact with or disconnected from the static contact 5 by rotating relative to the second contact piece 4. A grounding knife switch base 7 is arranged on the second contact piece 4, a grounding knife switch 8 is detachably connected to the grounding knife switch base 7, and a grounding static contact 9 in contact with the grounding knife switch 8 is arranged on the mounting base 1.

[0026] Among them, the mounting base 1 is provided with a grounding connection position 101. When the knife switch is used to connect the three-phase electricity to the grid, the ground wire is connected to the grounding connection position, and the isolation knife switch can be directly connected in series to the bench or tower to ensure that the power-off lines and equipment are well grounded when entering the maintenance state.

[0027] The working principle or workflow of the present invention is as follows: the isolating switch 6 is rotated so that the isolating switch 6 does not contact the static contact 5. The grounding switch 8 is connected to the grounding switch base 7, and the grounding switch 8 is contacted with the static grounding contact 9, so that the grounding operation can be completed.

[0028] Beneficial effects of the present invention: The knife switch of the present invention can realize the operation of grounding wire on the ground without installing a grounding device, thereby improving the operation efficiency and safety of the grounding wire. Compared with the isolation knife switch equipped with a grounding device, the grounding knife switch of the present invention has a small size, a simple structure, quick wiring and is easy to use.

[0029] Example 2

[0030] This embodiment is based on the embodiment 1. Figure 2-3 As shown, the grounding switch 8 is mounted on the grounding switch base 7.

[0031] Specifically, the grounding switch base 7 is provided with a hook 701, and the grounding switch 8 is provided with a hanging rod 801 that cooperates with the hook 701. The hanging rod 801 of the grounding switch 8 is hung on the hook 701 to complete the installation of the grounding switch 8, and then the grounding switch 8 is brought into contact with the grounding static contact 9 to complete the grounding wire operation, which is quick and simple. The grounding switch 7 can also be provided with a hanging rod, and the grounding switch 8 is provided with a hook that cooperates with the hanging rod.

[0032] Among them, the cross section of the hanging rod 801 is semicircular. This design can facilitate the grounding knife switch to be hung on the grounding knife switch base, and can ensure that the grounding knife switch is not easy to fall off from the base when it is closed.

[0033] Among them, round holes 802 are provided at both ends of the grounding knife switch 8. When the grounding knife switch is hung into the grounding knife switch base or taken out from the grounding knife switch base, the ground operator can complete the operation by inserting the operating rod into the upper round hole. When the grounding knife switch is in the grounding knife switch base and needs to be closed or opened, the operation can be completed by inserting the insulating operating rod into the lower round hole. The staff can complete the operation of disassembling, opening and closing the grounding knife switch by using the operating rod on the ground, which is easy to operate.

[0034] The remaining technical features are consistent with those of Example 1, and the working principle is also consistent with that of Example 1.

[0035] Example 3

[0036] On the basis of Example 1, Figure 2 and 4 As shown, the isolating knife switch 6 is provided with an anti-misoperation lever 601, and when the grounding knife switch 8 is in contact with the grounding static contact 9, one end of the anti-misoperation lever 601 is located on the side of the grounding knife switch 8 close to the static contact 5. When the grounding knife switch is in the closed state, forcibly closing the isolating knife switch will cause the grounding knife switch to be pulled open, thereby preventing the isolating knife switch and the grounding knife switch from being in the closed position at the same time, thereby achieving the purpose of preventing misoperation.

[0037] Among them, the isolation knife switch 6 is provided with a mounting frame 602, and the anti-misoperation rod 601 is installed on the mounting frame 602.

[0038] In addition, the isolation knife switch 6 includes two contact pieces 603 and a pull ring 604 arranged between the contact pieces 603. The second contact piece 4 is provided with a mounting plate 401. One end of the two contact pieces 603 is arranged on both sides of the mounting plate 401 and is rotatably connected to the second contact piece 4 through bolts 605, nuts 606 and springs 607. The other end of the contact piece 603 is connected to the pull ring 604 through bolts 605, nuts 606 and springs 607. Under the action of the spring, the contact piece forms an elastic pressure on the static contact and the second contact piece to ensure that the contact piece is in good contact with the static contact and the second contact piece. The pull ring is fixed to the moving contact through bolts to provide a force point for the pulling and closing operations of the knife switch.

[0039] The remaining technical features are consistent with those of Example 1, and the working principle is also consistent with that of Example 1.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An outdoor grounding knife switch, comprising a mounting base (1), two insulators (2) mounted on the mounting base (1), a first contact piece (3) and a second contact piece (4) respectively mounted on the insulator (2), a stationary contact (5) mounted on the first contact piece (3), and an isolating knife switch (6) rotatably connected to the second contact piece (4) and capable of contacting, closing or separating with the stationary contact (5), characterized in that: The second contact piece (4) is provided with a grounding knife switch base (7), a grounding knife switch (8) is detachably connected to the grounding knife switch base (7), and a grounding static contact (9) in contact with the grounding knife switch (8) is provided on the mounting base (1); the grounding knife switch (8) is mounted on the grounding knife switch base (7); the grounding knife switch base (7) is provided with a hook (701), and the grounding knife switch (8) is provided with a hanging rod (801) matched with the hook (701); the isolation knife switch (6) is provided with an anti-misoperation rod (601), and when the grounding knife switch (8) is in contact with the grounding static contact (9), one end of the anti-misoperation rod (601) is located on a side of the grounding knife switch (8) close to the static contact (5); the isolation knife switch (6) is provided with a mounting frame (602), and the anti-misoperation rod (601) is mounted on the mounting frame (602).

2. An outdoor groundable knife switch according to claim 1, characterized in that: The cross section of the hanging rod (801) is semicircular.

3. The outdoor groundable knife switch according to claim 1, characterized in that: Circular holes (802) are provided at both ends of the grounding switch (8).

4. The outdoor groundable knife switch according to claim 1, characterized in that: The mounting base (1) is provided with a ground connection position (101).

5. An outdoor groundable knife switch according to any one of claims 1 to 4, characterized in that: The isolating knife switch (6) comprises two contact pieces (603) and a pull ring (604) arranged between the contact pieces (603); the second contact piece (4) is provided with a mounting plate (401); one end of the two contact pieces (603) are respectively arranged on both sides of the mounting plate (401) and are rotatably connected to the mounting plate (401) through a clamping mechanism; the other end of the two contact pieces (603) are connected to the pull ring (604) through a clamping mechanism.

6. An outdoor groundable knife switch according to claim 5, characterized in that: The clamping mechanism comprises a fastener for connecting the contact piece (603) and an elastic piece for pressing the contact piece (603).

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