Split type protection device for high-voltage knife switch

Abstract

The utility model provides a split type protective device for a high-voltage knife switch, which comprises a left protective plate and a right protective plate which are in mirror symmetry in structure and are integrally insulated, and the upper ends of the left protective plate and the right protective plate are close to the lower ends of the high-voltage knife switch and are far away from the high-voltage knife switch. The upper edge of the left protection plate and the upper edge of the right protection plate are both provided with hanging pieces hung above the high-voltage knife switch, the faces, close to the high-voltage knife switch, of the left protection plate and the right protection plate are both movably connected with one ends of the corresponding connecting plates, the other ends of the connecting plates are suspended, and the surfaces of the suspended ends of the connecting plates are provided with adhesive tapes. And the suspended ends of the corresponding connecting plates on the left protection plate and the right protection plate are connected. The protection device can be installed under the condition that a distribution line where the high-voltage disconnecting link is located is not powered off, and the problems of corrosion, bird damage, pollution and the like of the high-voltage disconnecting link are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board protection, in particular to a split protection device for a high-voltage knife switch. Background Art

[0002] The high-voltage knife switch is an outdoor device in the power system, mainly used to isolate circuits, ensure the safety of maintenance, and switch the no-load circuit in specific scenarios. Existing high-voltage knife switches are usually fixed under the cross arm of the tower pole. There are often bird nests built on the cross arm, and sundries falling from the bird nests are likely to cause faults in the high-voltage knife switch; the exposed high-voltage knife switch is vulnerable to rust and attachment of pollutants after being invaded by rain and snow, which will also seriously affect the working efficiency and power transmission time and cause pollution flashover accidents. Bird damage, rust, and pollution flashover are important reasons for the failure of high-voltage knife switches.

[0003] In the prior art, the protection devices for outdoor high-voltage knife switches mainly include fully sealed protection devices, but the sealed insulating covers have the following disadvantages:

[0004] 1. The structure is complex. Insulating covers are respectively installed on the blades and the two-side terminal blocks of the high-voltage knife switch, which is inconvenient to install and cannot be installed live.

[0005] 2. Since the terminal blocks are completely covered by the insulating covers, it is impossible to see the fault indicators such as discharge traces, which affects the fault finding.

[0006] 3. The blades of the high-voltage knife switch are wrapped by the insulating covers, which limits the operation of pulling and closing the knife switch.

[0007] 4. The high-voltage knife switch is an outdoor device. Since the insulating cover completely wraps the device, the moisture is not easy to dissipate after rain and snow, and the device is prone to rust. Summary of the Utility Model

[0008] In view of this, the problem to be solved by the utility model is to provide a split protection device for a high-voltage knife switch, which can install this protection device under the state of the power distribution line without power failure, and reduce the problems of rust, bird damage, pollution, etc. of the high-voltage knife switch.

[0009] To solve the above technical problems, the technical solution adopted by the utility model is:

[0010] A split protection device for a high-voltage knife switch includes a left protection plate and a right protection plate that are mirror-symmetrical in structure and integrally insulated. The upper ends of the left protection plate and the right protection plate are close to the lower end of the high-voltage knife switch and the lower ends are far from the high-voltage knife switch. Hanging members for hanging above the high-voltage knife switch are provided at the upper edges of the left protection plate and the right protection plate. One side of the left protection plate and the right protection plate close to the high-voltage knife switch is movably connected to one end of the corresponding connecting plate, and the other end of the connecting plate is suspended. An adhesive tape is provided on the surface of the suspended end of the connecting plate to connect the suspended ends of the corresponding connecting plates on the left protection plate and the right protection plate.

[0011] Further, the connecting plate is movably connected to the middle section of the left protective plate or the right protective plate, so that the connecting plate is located below the high-voltage disconnecting switch after the left protective plate or the right protective plate is installed.

[0012] Further, a plurality of connecting plates are uniformly arranged along the length direction of the middle section of the left protective plate or the right protective plate.

[0013] Further, connecting plates are provided at both the front and rear ends of the left protective plate or the right protective plate in the length direction, and the distance value between the two connecting plates is not greater than the length value of the high-voltage disconnecting switch.

[0014] Further, insulating coatings are provided on the surface of the suspension member, at the connection between the connecting plate and the left protective plate, and at the connection between the connecting plate and the right protective plate.

[0015] Further, a cylindrical member is provided below the connecting plate and along the height direction of the corresponding left protective plate or right protective plate.

[0016] Further, the lower edge of the cylindrical member is flush with the lower edge of the left protective plate or the right protective plate.

[0017] Further, a plurality of suspension members are uniformly provided at the upper edges of the left protective plate and the right protective plate.

[0018] Further, the suspension member is a U-shaped plate with an opening facing downward.

[0019] The advantages and positive effects of the present utility model are as follows:

[0020] The protection device is jointly composed of a left protective plate and a right protective plate. The left protective plate and the right protective plate are lifted by the cylindrical member and suspended on the opposite sides of the high-voltage disconnecting switch. Based on the self-gravity of the left protective plate and the right protective plate, they are inclined and closely attached to the opposite sides of the high-voltage disconnecting switch. The connecting plates at opposite positions on the left protective plate and the right protective plate are connected by adhesive tape to complete the installation of the protection device. Installing the protection device does not require close operation by staff, and the entire protection device is made of insulating materials, which does not affect the normal operation of the high-voltage disconnecting switch. Therefore, the protection device can be installed while energized, and the protection device can reduce problems such as corrosion, bird damage, and pollution of the high-voltage disconnecting switch. Description of the Drawings

[0021] The drawings are used to provide further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0022] Figure 1 is the front view of a split protection device for a high-voltage disconnecting switch of the present utility model;

[0023] Figure 2 It is the right view of the right protective plate of a split protective device for a high-voltage knife switch of the present utility model;

[0024] Figure 3 It is the right view of the left protective plate of a split protective device for a high-voltage knife switch of the present utility model;

[0025] In the figure: 1. Left protective plate; 2. Hanging member; 3. Connecting plate; 301. Adhesive tape; 4. Cylindrical member; 5. Right protective plate. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] The present utility model provides a split protective device for a high-voltage knife switch. The high-voltage knife switch includes a base, on which two insulating columns and corresponding terminal blocks are installed. The bottom ends of the insulating columns are connected to external wires through the terminal blocks. A blade is installed at the top end of one insulating column, and a contact cooperating with the blade is installed at the top end of the other insulating column. The blades of existing high-voltage knife switches used outdoors usually adopt a double-rod structure, which can shunt the circuit to reduce the current-carrying capacity of a single conductor and enhance the mechanical strength of the blade.

[0030] Such as Figures 1 to 3As shown in the figure, the protection device includes a left protection plate 1 and a right protection plate 5 with mirror-symmetrical structures. The left protection plate 1 and the right protection plate 5 are made of insulating materials as a whole. After the left protection plate 1 and the right protection plate 5 are both installed on the high-voltage disconnecting switch, the upper ends of the left protection plate 1 and the right protection plate 5 are close to or in contact with the high-voltage disconnecting switch, and the lower ends are far from the high-voltage disconnecting switch, so that the left protection plate 1 and the right protection plate 5 together form a V-shaped structure with a lower opening, and the high-voltage disconnecting switch is entirely located within the V-shaped structure, facilitating the shielding of contaminants and bird's nest debris falling from above.

[0031] A triangular cavity is formed among the base at the lower end of the high-voltage disconnecting switch, the left protection plate 1, and the right protection plate 5, but the two ends in the length direction of the triangular cavity are not sealed, facilitating the ventilation of the high-voltage disconnecting switch and preventing the terminal, insulating pillar, blade, and contact from rusting.

[0032] A U-shaped steel channel with an upward opening is fixedly installed at the top of the high-voltage disconnecting switch (the U-shaped steel channel is installed simultaneously with the high-voltage disconnecting switch and does not contact the energized part of the high-voltage disconnecting switch). The U-shaped steel channel includes a left side wall and a right side wall that cooperate with the suspension member 2. The upper edges of the left protection plate 1 and the right protection plate 5 are provided with suspension members 2, and the left protection plate 1 and the right protection plate 5 are successively suspended on the U-shaped steel channel through the cooperation of the suspension members 2 with the left side wall or the right side wall. The entire installation process of the protection device does not contact the energized part of the high-voltage disconnecting switch, facilitating the live installation of the protection device.

[0033] The suspension member 2 is a U-shaped plate with a downward opening, and this structure can facilitate the integral molding of the U-shaped plate with the left protection plate 1 or the right protection plate 5. One embodiment of the present application is that a plurality of suspension members 2 are evenly arranged on the upper edges of the left protection plate 1 and the right protection plate 5, which can improve the suspension stability of the left protection plate 1 and the right protection plate 5.

[0034] The groove width of the U-shaped plate is not less than the wall thickness of the left side wall (right side wall), facilitating the quick suspension of the left protection plate 1 and the right protection plate 5. Since there is a gap between the U-shaped plate and the U-shaped steel channel, the inclination angles of the left protection plate 1 and the right protection plate 5 can be independently adjusted according to the actual shape of the high-voltage disconnecting switch, enabling the protection device to be compatible with various models of high-voltage disconnecting switches (compatible with high-voltage disconnecting switches of different sizes).

[0035] One side of the left protection plate 1 and the right protection plate 5 close to the high-voltage disconnecting switch is movably connected to one end of the corresponding connecting plate 3, and the other end of the connecting plate 3 is suspended. The surface of the suspended end of the connecting plate 3 is provided with an adhesive tape 301. After the left protection plate 1 and the right protection plate 5 are respectively suspended on both sides of the high-voltage disconnecting switch, the connecting plates 3 on the left protection plate 1 and the right protection plate 5 are located below the high-voltage disconnecting switch and face each other in pairs. The suspended ends of the corresponding connecting plates 3 are connected through the adhesive tape 301 to complete the fixation of the left protection plate 1 and the right protection plate 5. One embodiment of the present application is that the right wall of the connecting plate 3 on the left protection plate 1 is provided with an adhesive tape 301, and the right wall of the connecting plate 3 on the right protection plate 5 is provided with an adhesive tape 301.

[0036] One embodiment of the present application is as follows: The lengths of the left protection plate 1 and the right protection plate 5 are greater than the length of the high-voltage disconnect switch (the length direction of the high-voltage disconnect switch is equal to the length direction of the left protection plate 1 or the right protection plate 5). By increasing the shielding redundancy in the length direction of the left protection plate 1 and the right protection plate 5, the protection efficiency of the protection device is improved.

[0037] A number of connecting plates 3 are uniformly arranged along the length direction on the side of the left protection plate 1 and the right protection plate 5 close to the high-voltage disconnect switch. The more the number of the connecting plates 3, the stronger the installation stability of the left protection plate 1 and the right protection plate 5, and it is more difficult for strong winds from the outside to make them fall off. One embodiment of the present application is as follows: Connecting plates 3 are respectively provided at the front and rear ends in the length direction of the left protection plate 1 and the right protection plate 5, and the distance value between the two connecting plates 3 is not greater than the length value of the high-voltage disconnect switch, which is used to reduce the probability of the protection equipment falling.

[0038] Below the connecting plate 3 of the left protection plate 1 and the right protection plate 5, a cylindrical member 4 is provided. The central axis of the cylindrical member 4 is parallel to the height direction of the left protection plate 1 and the right protection plate 5, which is convenient for lifting and lowering the left protection plate 1 and the right protection plate 5 smoothly through the cylindrical member 4.

[0039] One embodiment of the present application is as follows: The cylindrical member 4 is matched with the upper end of the support rod. The staff adjusts the height of the support rod to raise the left protection plate 1 or the right protection plate 5 to a set height and hang it on the left side wall or the right side wall.

[0040] The lower end of the support rod is telescopically arranged, and a stop platform (or frustum structure) is provided at the upper end of the support rod. When the upper end of the support rod is matched with the cylindrical member 4, the rod at the upper end of the stop platform passes through the cylindrical member 4 until the top surface of the stop platform contacts the bottom surface of the cylindrical member 4 to complete the mating installation. After the left protection plate 1 or the right protection plate 5 is hung, shorten the lower end of the support rod to move the rod at the upper end of the stop platform out of the cylindrical member 4. One embodiment of the present application is as follows: The lower edge of the cylindrical member 4 is flush with the lower edge of the left protection plate 1 or the right protection plate 5, which can make the support rod support the left protection plate 1 or the right protection plate 5 smoothly.

[0041] The left protection plate 1 and the right protection plate 5 are both made of insulating materials as a whole. Insulating coatings are provided on the surface of the suspension member 2, the connection between the connecting plate 3 and the left protection plate 1, and the connection between the connecting plate 3 and the right protection plate 5. Since the suspension member 2 is in direct contact with the blade, adding an insulating coating on the surface of the suspension member 2 can further improve the insulation efficiency. Setting an insulating coating at the connection between the connecting plate 3 and the main board can reduce the probability of surface discharge and improve the insulation of the protection device.

[0042] The working principle and working process of the present utility model are as follows:

[0043] During installation, the high-voltage disconnect switch does not need to be powered off. Only by using the support rod to hang the left protection plate 1 and the right protection plate 5 on the U-shaped channel steel above the high-voltage disconnect switch, the left protection plate 1 and the right protection plate 5 will be closely attached to both sides of the high-voltage disconnect switch due to their own gravity. Then, use the support rod to push the suspended end of the connecting plate 3 upward at the same time, and connect the suspended ends of the connecting plates 3 at opposite positions through the adhesive tape 301 to complete the installation of the protection device. The entire protection device has the advantages of low cost, simple structure, convenient installation, and not being easily damaged.

[0044] The upper edges of the left protection plate 1 and the right protection plate 5 are hung on both sides of the high-voltage disconnect switch in an inclined manner through the hanging parts 2 with a hook structure, and the inclined surfaces effectively divert rainwater and reduce the deposition of dust at the same time.

[0045] The bottom and both ends of the protection device are of an open structure, which can facilitate the operation of the staff such as closing and opening the disconnect switch, and is conducive to the dissipation of moisture after rain and snow, and the equipment is not easily rusted.

[0046] After the left protection plate 1 and the right protection plate 5 are installed and fixed, both ends of the high-voltage disconnect switch in the direction of its blade are not sealed, and it is convenient to see the fault indicators such as discharge traces, which is conducive to fault finding.

[0047] The solution of this application has the advantages of preventing bird damage, anti-rust, anti-pollution flashover, simple structure, convenient installation, conducive to fault finding, not being easily damaged, safe and reliable, etc., and can further improve the reliability and safety of the equipment. Due to the simple structure and convenient installation, the material input and the labor volume of workers can be reduced. After use, the occurrence of bird damage faults on the disconnect switch can be eliminated, and the occurrence of rust faults can be reduced.

[0048] The above has described the embodiments of the present invention in detail, but the above content is only the preferred embodiments of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the scope of the present invention should still fall within the scope covered by this patent.

Claims

1. A split-type protection device for a high-voltage knife switch, characterized in that, It includes a left protective plate and a right protective plate that are structurally mirror-symmetrical and overall insulated. The upper ends of the left protective plate and the right protective plate are close to the lower end of the high-voltage knife switch and the lower ends are far from the high-voltage knife switch. Hanging members are provided at the upper edges of the left protective plate and the right protective plate and are hung above the high-voltage knife switch. One side of the left protective plate and the right protective plate close to the high-voltage knife switch is movably connected to one end of the corresponding connecting plate, and the other end of the connecting plate is suspended. An adhesive tape is provided on the surface of the suspended end of the connecting plate to connect the suspended ends of the corresponding connecting plates on the left protective plate and the right protective plate.

2. The split-type protection device for a high-voltage disconnect switch according to claim 1, characterized in that The connecting plate is movably connected to the middle section of the left protective plate or the right protective plate so that the connecting plate is located below the high-voltage knife switch after the left protective plate or the right protective plate is installed.

3. The split-type protection device for a high-voltage disconnect switch according to claim 2, wherein, A number of connecting plates are evenly arranged along the length direction of the middle section of the left protective plate or the right protective plate.

4. The split protection device for a high-voltage disconnecting switch according to claim 3, characterized in that, Connecting plates are provided at both the front and rear ends of the left protective plate or the right protective plate in the length direction, and the distance value between the two connecting plates is not greater than the length value of the high-voltage knife switch.

5. The split-type protection device for a high-voltage knife switch according to claim 1, characterized in that, Insulating coatings are provided on the surface of the hanging member, the connection between the connecting plate and the left protective plate, and the connection between the connecting plate and the right protective plate.

6. The split-type protection device for a high-voltage knife switch according to claim 1, characterized in that, A cylindrical member is provided below the connecting plate and along the height direction of the corresponding left protective plate or right protective plate.

7. The split-type protection device for a high-voltage disconnecting switch according to claim 6, characterized in that, The lower edge of the cylindrical member is flush with the lower edge of the left protective plate or the right protective plate.

8. The split-type protection device for a high-voltage knife switch according to claim 1, characterized in that, A number of hanging members are evenly provided at the upper edges of the left protective plate and the right protective plate.

9. The split-type protection device for a high-voltage knife switch according to claim 1, characterized in that, The hanging member is a U-shaped plate with the opening facing downwards.

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