Line overvoltage protector with disconnecting device

Abstract

The invention relates to the field of overvoltage protectors, and discloses a line overvoltage protector with a disconnecting device, which comprises a mounting rack, the mounting rack is arranged below a high-voltage line, the top surface of the mounting rack is in threaded connection with a protector body, and the top surface of the mounting rack is in threaded connection with a lightning arrester. A mounting block is fixed to the bottom face of the mounting frame, a containing hole is formed in the bottom face of the mounting block and corresponds to the output end of the lightning arrester, an electromagnet is fixed to the top face of the inner wall of the containing hole and electrically connected with the lightning arrester, and a disconnector is arranged on the inner wall of the containing hole in a clamped mode. And an iron ring is fixed at the top end of the disconnector. According to the invention, through cooperation of the electromagnet and the electric push rod, the disconnector can rapidly and completely disconnect a circuit during action, the protector body is prevented from continuously absorbing energy after action, the protector body is prevented from being damaged, and meanwhile, the safety of protected equipment is also ensured.

Description

Technical Field

[0001] The invention relates to the technical field of overvoltage protectors, in particular to a line overvoltage protector with a disconnecting device. Background Art

[0002] Line overvoltage protector refers to the equipment that protects overhead lines. Direct lightning overvoltage or induced overvoltage caused by lightning strikes on overhead lines can easily cause insulator flashover or breakdown, resulting in power frequency continuous current and high-temperature arc that instantly melts the conductor. In order to prevent this accident, it is necessary to install line overvoltage protector on overhead lines. Its function is to guide the lightning current to the protector when lightning strikes the overhead line, and cut off the power frequency continuous current to avoid insulator flashover or breakdown, thus protecting the overhead line from lightning-strike line break accidents.

[0003] The Chinese patent with announcement number: CN204905826U is a fixed gap overvoltage protector with a disconnector. Its structure is that the lightning arrester with an insulated conductor is connected to the insulator line crossarm through an insulating bracket and an anti-slip mounting bracket. The lightning arrester is connected to the puncture throat clamp through an insulated copper conductor, and the puncture throat clamp is connected to the 10kV overhead insulated conductor. The lightning arrester built-in insulator is installed at the bottom of the lightning arrester with insulated conductor, and a right discharge electrode base is provided between the lightning arrester and the built-in insulator of the lightning arrester. The right discharge electrode is connected to the right discharge electrode base, and the lower part of the built-in insulator of the lightning arrester is connected to one end of the disconnector, and the other end of the disconnector is connected to the anti-slip mounting bracket and the B fixing hole of the insulating bracket through a bare copper wire.

[0004] In the above scheme, the grounding terminal of the disconnector is automatically disconnected when the arrester fails due to an abnormality through discharge between the two electrodes. However, it has the following disadvantages: when the arrester exceeds the rated voltage and fails due to an abnormality, the disconnector cannot completely disconnect the circuit and there is a certain contact resistance, so that the protector continues to absorb electrical energy and is damaged, thereby increasing the safety risk. Summary of the invention

[0005] The purpose of the present invention is to provide a line overvoltage protector with a disconnect device to solve the problem that the disconnect device cannot completely disconnect the circuit, there is a certain contact resistance, and the protector continues to absorb electrical energy, causing damage, thereby increasing safety risks.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: a line overvoltage protector with a disconnection device, comprising a mounting frame, the mounting frame is arranged below the high-voltage line, the top surface of the mounting frame is threadedly connected to a protector body, the top surface of the mounting frame is threadedly connected to a lightning arrester, a mounting block is fixed to the bottom surface of the mounting frame, a receiving hole is provided on the bottom surface of the mounting block, the receiving hole corresponds to the output end of the lightning arrester, an electromagnet is fixed to the top surface of the inner wall of the receiving hole, the electromagnet is electrically connected to the lightning arrester, a disconnector is clamped on the inner wall of the receiving hole, and an iron ring is fixed to the top of the disconnector. The iron ring is magnetically attracted to the electromagnet, the output end of the disconnector is connected to a first connecting wire, the other end of the first connecting wire is threadedly connected to the bottom surface of the mounting frame, the other end of the first connecting wire is connected to a ground wire, sliding grooves are provided on the left and right sides of the inner wall of the accommodating hole, the inner wall of the sliding groove is provided with an installation groove, an electric push rod is fixed to the inner wall of the installation groove, the electric push rod is electrically connected to the lightning arrester, a limit plate is fixed to one end of the telescopic rod of the electric push rod, the limit plate is slidably arranged with the sliding groove, the electromagnet can be powered off when the protector body exceeds the rated voltage, so that the disconnection device can be disconnected from the output end of the lightning arrester.

[0007] Preferably, the bottom surface of the limit plate is provided with an inclined surface, which enables the limit plate to be better inserted into the connection between the disconnector and the arrester, so that the disconnector can be quickly disconnected from the arrester, thereby improving the disconnection efficiency of the disconnection device.

[0008] Preferably, a fixing hole is provided on the bottom surface of the inner wall of the sliding groove, and the fixing hole is connected with the accommodating hole. A limiting column is slidably provided on the inner wall of the fixing hole. The top end of the limiting column contacts the inclined surface of the bottom surface of the limiting plate. A spring is wound around the outer wall of the limiting column, one end of the spring is fixed to the inner wall of the fixing hole, and the other end of the spring is fixed to the outer wall of the limiting column. The spring can drive the limiting column to reset when the limiting plate is reset, thereby improving the flexibility of the disengagement device.

[0009] Preferably, a placement groove is opened at the top of the protector body, the high-voltage line is fixed in the placement groove, a second connecting wire is fixed at the top of the arrester, a fixing ring is fixed at one end of the second connecting wire, and the fixing ring is fixed to the outer wall of the high-voltage line.

[0010] Preferably, a fixing frame is clamped on one side of the mounting frame, a fixing bolt is threadedly connected to one side of the fixing frame, the fixing frame is fixed to one side of the mounting frame by the fixing bolt, a connecting column is fixed on one side of the fixing frame, the outer wall of the connecting column is rotatably connected to the wind direction frame, the cooperation between the fixing frame and the fixing bolt can facilitate the staff to disassemble and install the wind direction frame, so that the wind direction frame can be installed in different positions according to needs, thereby improving the assemblability of the wind direction frame.

[0011] Preferably, a cloth strip is fixed to one end of the wind direction frame, and the cloth strip can rotate along with the wind direction frame when the wind direction frame rotates, so that the wind direction frame can drive away birds on the mounting frame when it rotates, thereby preventing the birds from affecting the operation of the protector body, thereby improving the safety of the protector body.

[0012] Preferably, a luminous column is fixed to the bottom end of the disconnector, and the luminous column can increase the visibility of the disconnector in a dim environment.

[0013] Preferably, the inner wall of the accommodating hole is provided with an insulating layer, which can electrically isolate the mounting block to prevent the voltage from affecting the electric push rod when the lightning arrester is in operation, thereby ensuring the normal operation of the disconnector.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Through the cooperation of the electromagnet and the electric push rod, the disconnector can quickly and completely disconnect the circuit when it is in action, preventing the protector body from continuing to absorb energy after the action, avoiding damage to the protector body, and ensuring the safety of the protected equipment. When the protector body detects overvoltage, the disconnector will act quickly, the electromagnet will be disconnected, and then the electric push rod will push the limit plate to move to the middle of the accommodation hole. At this time, the limit plate will be inserted between the electromagnet and the disconnector and the iron ring, thereby blocking the transient current and preventing the transient current from affecting the electromagnet, thereby improving the disconnection efficiency of the disconnector;

[0016] Second, the cooperation between the limit column and the spring can assist the disconnector to detach from the arrester. When the electric push rod pushes the limit plate to move, the limit column will move downward under the action of the inclined surface, thereby exerting a driving force on the disconnector, so that the limit plate separates the disconnector from the electromagnet, and the disconnector can quickly detach from the receiving hole. The second connecting line can be connected to the high-voltage line through the fixing ring, so that when the voltage of the high-voltage line is too large, the second connecting line can transmit the high voltage to the arrester, thereby assisting the disconnector to detach from the arrester, thereby improving the use effect of the disconnector;

[0017] 3. The luminous column enables the staff to quickly find the location of the fault at night, making it easy for maintenance personnel to find the fault point in time for maintenance, thereby saving a lot of labor and time costs and improving the work efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional schematic diagram of the invention;

[0019] Figure 2 Schematic diagram of the explosion of the invention;

[0020] Figure 3 for Figure 2Explosion diagram of the middle fixed frame and connecting column;

[0021] Figure 4 for Figure 2 The enlarged schematic diagram at A in the middle;

[0022] Figure 5 for Figure 2 Enlarged schematic diagram of point B in the middle.

[0023] In the figure: 1. mounting frame; 2. high voltage line; 3. protector body; 4. lightning arrester; 5. mounting block; 6. receiving hole; 7. electromagnet; 8. disconnector; 9. iron ring; 10. first connecting line; 11. sliding groove; 12. mounting groove; 13. electric push rod; 14. limit block; 15. fixing hole; 16. limit column; 17. spring; 18. placement groove; 19. second connecting line; 20. fixing ring; 21. fixing frame; 22. fixing bolt; 23. connecting column; 24. wind direction frame; 25. cloth strip; 26. luminous column. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a line overvoltage protector with a disconnecting device comprises a mounting frame 1, wherein the mounting frame 1 is arranged below a high-voltage line 2, a protector body 3 is threadedly connected to the top surface of the mounting frame 1, a lightning arrester 4 is threadedly connected to the top surface of the mounting frame 1, a mounting block 5 is fixed to the bottom surface of the mounting frame 1, a receiving hole 6 is provided on the bottom surface of the mounting block 5, the receiving hole 6 corresponds to the output end of the lightning arrester 4, an electromagnet 7 is fixed to the top surface of the inner wall of the receiving hole 6, the electromagnet 7 is electrically connected to the lightning arrester 4, a disconnector 8 is clamped on the inner wall of the receiving hole 6, an iron ring 9 is fixed to the top of the disconnector 8, and the iron ring 9 The output end of the disconnector 8 is magnetically attracted to the electromagnet 7, and the other end of the first connecting wire 10 is connected to the bottom surface of the mounting frame 1 by threading. The other end of the first connecting wire 10 is connected to the ground wire. The inner wall of the receiving hole 6 is provided with sliding grooves 11 on both sides, and the inner wall of the sliding groove 11 is provided with a mounting groove 12. The inner wall of the mounting groove 12 is fixed with an electric push rod 13, and the electric push rod 13 is electrically connected to the lightning arrester 4. One end of the telescopic rod of the electric push rod 13 is fixed with a limit plate 14, and the limit plate 14 is slidably arranged with the sliding groove 11, and the bottom surface of the limit plate 14 is provided with an inclined surface. In the case of overvoltage, the gas inside the gas discharge tube is ionized to form a conductive channel, and the overvoltage energy is transferred to the ground through the ground wire.

[0026] In use, through the cooperation of the electromagnet 7 and the electric push rod 13, the disconnector 8 can quickly and completely disconnect the circuit when it is in action, preventing the protector body 3 from continuing to absorb energy after the action, avoiding damage to the protector body 3, and also ensuring the safety of the protected equipment. When the protector body 3 detects an overvoltage, the disconnection device will act quickly, the electromagnet 7 will be disconnected, and then the electric push rod 13 will push the limit plate 14 to move to the middle of the accommodating hole 6. At this time, the limit plate 14 will be inserted between the electromagnet 7 and the disconnector 8 and the iron ring 9, thereby blocking the transient current and preventing the transient current from affecting the electromagnet 7, thereby improving the disconnection efficiency of the disconnection device. The limit plate 14 can be better inserted into the connection between the disconnector 8 and the arrester 4 through the inclined surface, so that the disconnector 8 can quickly detach from the arrester 4, thereby improving the disconnection efficiency of the disconnection device.

[0027] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a fixing hole 15 is provided on the bottom surface of the inner wall of the sliding groove 11, and the fixing hole 15 is connected with the accommodating hole 6. A limiting column 16 is slidably provided on the inner wall of the fixing hole 15, and the top of the limiting column 16 contacts the inclined surface of the bottom surface of the limiting plate 14. A spring 17 is wound around the outer wall of the limiting column 16, and one end of the spring 17 is fixed to the inner wall of the fixing hole 15, and the other end of the spring 17 is fixed to the outer wall of the limiting column 16. A placement groove 18 is provided on the top of the protector body 3, and the high-voltage line 2 is fixed in the placement groove 18. A second connecting wire 19 is fixed on the top of the lightning arrester 4, and a fixing ring 20 is fixed on one end of the second connecting wire 19, and the fixing ring 20 is fixed to the outer wall of the high-voltage line 2.

[0028] In use, the cooperation between the limit column 16 and the spring 17 can assist the disconnector 8 to detach from the lightning arrester 4. When the electric push rod 13 pushes the limit plate 14 to move, the limit column 16 will move downward under the action of the inclined surface, thereby applying a driving force to the disconnector 8, so that the limit plate 14 separates the disconnector 8 from the electromagnet 7, and then the disconnector 8 can quickly detach from the receiving hole 6. The second connecting line 19 can be connected to the high-voltage line 2 through the fixing ring 20, so that when the voltage of the high-voltage line 2 is too large, the second connecting line 19 can transmit the high voltage to the lightning arrester 4, thereby assisting the disconnector 8 to detach from the lightning arrester 4, thereby improving the use effect of the disconnection device.

[0029] like Figure 1-Figure 5 As shown, a fixing frame 21 is clamped on one side of the mounting frame 1, a fixing bolt 22 is threadedly connected to one side of the mounting frame 1 through the fixing bolt 22, a connecting column 23 is fixed to one side of the fixing frame 21, an outer wall of the connecting column 23 is rotatably connected to a wind direction frame 24, and a cloth strip 25 is fixed to one end of the wind direction frame 24.

[0030] In use, the cooperation between the fixing frame 21 and the fixing bolts 22 can facilitate the staff to disassemble and install the wind direction frame 24, so that the wind direction frame 24 can be installed in different positions according to needs, thereby improving the assembly of the wind direction frame 24. The cloth strip 25 can rotate with the wind direction frame 24 when it rotates, so that the wind direction frame 24 can drive away the birds on the mounting frame 1 when it rotates, thereby preventing the birds from affecting the work of the protector body 3, thereby improving the safety of the protector body 3.

[0031] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a luminous column 26 is fixed to the bottom end of the disconnector 8, and an insulating layer is provided on the inner wall of the receiving hole 6.

[0032] In use, the luminous column 26 can increase the visibility of the disconnector 8 in a dim environment, so that the staff can quickly find the location of the fault at night, which is convenient for the maintenance personnel to find the fault point in time for maintenance, thereby saving a lot of labor and time costs and improving the work efficiency of the staff. The mounting block 5 can be isolated from electricity by the insulating layer to prevent the voltage of the lightning arrester 4 from affecting the electric push rod 13 when it is in operation, thereby ensuring the normal operation of the disconnector 8.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A line overvoltage protector with a disconnecting device, comprising a mounting frame (1), wherein the mounting frame (1) is arranged below a high-voltage line (2), and is characterized in that: The top surface of the mounting frame (1) is threadedly connected to a protector body (3), the top surface of the mounting frame (1) is threadedly connected to a lightning arrester (4), the bottom surface of the mounting frame (1) is fixed with a mounting block (5), the bottom surface of the mounting block (5) is provided with a receiving hole (6), the receiving hole (6) corresponds to the output end of the lightning arrester (4), the top surface of the inner wall of the receiving hole (6) is fixed with an electromagnet (7), the electromagnet (7) is electrically connected to the lightning arrester (4), the inner wall of the receiving hole (6) is clamped with a disconnector (8), the top of the disconnector (8) is fixed with an iron ring (9), the iron ring (9) and the electromagnet (7) are magnetically attracted to each other, the The output end of the disconnector (8) is connected to a first connecting wire (10), the other end of the first connecting wire (10) is threadedly connected to the bottom surface of the mounting frame (1), the other end of the first connecting wire (10) is connected to a ground wire, the inner wall of the accommodating hole (6) is provided with sliding grooves (11) on both sides, the inner wall of the sliding groove (11) is provided with a mounting groove (12), the inner wall of the mounting groove (12) is fixed with an electric push rod (13), the electric push rod (13) is electrically connected to the lightning arrester (4), and one end of the telescopic rod of the electric push rod (13) is fixed with a limit plate (14), and the limit plate (14) is slidably arranged with the sliding groove (11).

2. A line overvoltage protector with a disconnection device according to claim 1, characterized in that: The bottom surface of the limiting plate (14) is provided with an inclined surface.

3. A line overvoltage protector with a disconnection device according to claim 2, characterized in that: The bottom surface of the inner wall of the sliding groove (11) is provided with a fixing hole (15), the fixing hole (15) is communicated with the accommodating hole (6), the inner wall of the fixing hole (15) is slidably provided with a limiting column (16), the top end of the limiting column (16) is in contact with the inclined surface of the bottom surface of the limiting plate (14), the outer wall of the limiting column (16) is wound with a spring (17), one end of the spring (17) is fixed to the inner wall of the fixing hole (15), and the other end of the spring (17) is fixed to the outer wall of the limiting column (16).

4. A line overvoltage protector with a disconnection device according to claim 1, characterized in that: The top of the protector body (3) is provided with a placement groove (18), the high-voltage line (2) is fixed in the placement groove (18), the top of the lightning arrester (4) is fixed with a second connecting wire (19), one end of the second connecting wire (19) is fixed with a fixing ring (20), and the fixing ring (20) is fixed to the outer wall of the high-voltage line (2).

5. A line overvoltage protector with a disconnection device according to claim 1, characterized in that: A fixing frame (21) is clamped on one side of the mounting frame (1), a fixing bolt (22) is threadedly connected to one side of the fixing frame (21), the fixing frame (21) is fixed to one side of the mounting frame (1) by the fixing bolt (22), a connecting column (23) is fixed on one side of the fixing frame (21), and the outer wall of the connecting column (23) is rotatably connected to a wind direction frame (24).

6. A line overvoltage protector with a disconnection device according to claim 5, characterized in that: A cloth strip (25) is fixed to one end of the wind direction frame (24).

7. A line overvoltage protector with a disconnection device according to claim 1, characterized in that: A luminous column (26) is fixed to the bottom end of the disconnector (8).

8. A line overvoltage protector with a disconnection device according to claim 1, characterized in that: The inner wall of the accommodating hole (6) is provided with an insulating layer.

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