Separating device for lightning arrester

Abstract

The utility model discloses a disengagement device for a lightning arrester, which relates to the technical field of lightning arresters and comprises a disconnector and a protective cover covering the disconnector, the protective cover is fixedly connected with the disconnector through a fixing assembly, screw rods are arranged at two ends of the disconnector, and the protective cover is fixedly connected with the disconnector. Nuts and conducting strips are movably arranged on the outer rings of the two screw rods, the conducting strip on the upper portion is electrically connected with an external high-voltage wire through a first wire, and the conducting strip on the lower portion is electrically connected with the high-voltage end of an external lightning arrester through a second wire. According to the utility model, when the lightning arrester is damaged, the separation device acts, and burst fragments are blocked by the protective cover, so that the explosion range is effectively reduced, the damage to surrounding equipment is reduced, and the problem that the burst fragments are easy to splash to the periphery to damage the surrounding equipment after the separation device for the lightning arrester bursts is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arresters, in particular to a detaching device for lightning arresters. Background Art

[0002] The disconnector is an additional device of the lightning arrester. It is usually connected in series with the lightning arrester on the high-voltage side or grounding side of the lightning arrester. When the lightning arrester is operating normally, it will withstand the transient current and discharge the overvoltage energy. The disconnector can withstand it and will not act. When the lightning arrester fails, the disconnector should act quickly to disconnect the high-voltage line or grounding line connected to the lightning arrester, so that the lightning arrester can be shut down. This can prevent the grid from being grounded and unable to deliver electricity due to the lightning arrester failure, and prevent the accident from further expanding.

[0003] The document of the existing patent publication number CN212517888U proposes that the utility model isolates water vapor through a cylindrical isolation chamber set in the storage chamber to avoid damage to the discharge gap and the capacitor, thereby minimizing the possibility of false operation of the separation device. After the separation device is operated, the exploded marking belt can clearly mark the damage of the separation device, making it convenient for the staff to carry out maintenance and replacement.

[0004] However, after the detachment device of publication number CN212517888U explodes, the blasted fragments are easily splashed around, thereby damaging surrounding equipment. Therefore, it is necessary to propose a detachment device for a lightning arrester to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a detaching device for a lightning arrester, so as to solve the problem that after the detaching device for a lightning arrester mentioned above explodes, the exploded fragments are easily splashed around, thereby damaging the surrounding equipment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a disconnecting device for a lightning arrester, comprising a disconnector and a protective cover covering the outside of the disconnector, the protective cover being fixedly connected to the disconnector through a fixing assembly, screws being arranged at both ends of the disconnector, nuts and conductive sheets being movably arranged at the outer rings of the two screws, the upper conductive sheet being electrically connected to an external high-voltage conductor through a first conductive wire, and the lower conductive sheet being electrically connected to a high-voltage end of an external lightning arrester through a second conductive wire;

[0007] A limiting hole is fixedly provided on one side of the top of the protective cover, and one end of the first wire away from the conductive sheet moves through the limiting hole and extends out of the protective cover, and isolation plates are fixedly provided at both ends of the disconnector, and the screw passes through the two side surfaces of the isolation plate;

[0008] The fixing assembly includes a first plug rod and a fixing groove, two first plug rods are provided, and the two first plug rods are fixedly mounted on the inner wall of the top of the protective cover, ear plates are fixedly provided at both ends of the nut, a first through hole is provided on the ear plate, the first through hole is matched with the first plug rod, the fixing groove is fixedly provided on the isolation plate, the lower end of the first plug rod is matched with the fixing groove, and when the nut tightens the conductive sheet on the disconnector, the fixing groove and the first through hole correspond to each other in the vertical position.

[0009] Preferably, an elastic glue is fixedly provided on the inner wall of the limiting hole, a second through hole is provided in the middle of the elastic glue, and a first sealing glue layer is coated between the second through hole and the first conductive wire.

[0010] Preferably, a second sealant layer is coated between the isolation plate and the separator.

[0011] Preferably, the ear plate on the lower nut and the fixing groove on the lower isolation plate are fixedly connected via a second insertion rod.

[0012] Preferably, the height of the bottom of the protective cover is less than the height of the bottom of the separator.

[0013] Preferably, an inner wall of the protective cover is provided with an air cavity, and the air cavity is filled with SF6 gas.

[0014] Technical effects and advantages of the utility model:

[0015] 1. When the arrester is damaged, the detachment device is activated, and the bursting fragments are blocked by the protective cover, which effectively reduces the explosion range and the damage to the surrounding equipment. It solves the problem that after the detachment device for the arrester bursts, the bursting fragments are easy to splash around, thereby damaging the surrounding equipment;

[0016] 2. By installing a protective cover, the damage to the disconnecting device from the external environment can be reduced, thus extending the service life of the disconnecting device;

[0017] 3. Through the installation of the first sealant layer and the second sealant layer, the direct effect of rainwater on the disconnector can be effectively avoided, thereby preventing the heating elements inside the disconnector from getting damp;

[0018] 4. By installing the fixing assembly, it is convenient to fix the connection between the protective cover and the disconnector without causing damage to the disconnector itself. The position of the nut is limited by the first plug rod, and the disconnector will not loosen even if it shakes under the action of wind, thereby improving the installation strength of the disconnector;

[0019] 5. When the disconnector explodes, the air cavity is broken by fragments, releasing the internal SF gas, effectively isolating the air and preventing secondary damage caused by sparks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of the three-dimensional structure of the release device for the lightning arrester.

[0021] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of the release device for the lightning arrester.

[0022] Figure 3 For this utility model Figure 3 Enlarged schematic diagram of the local structure.

[0023] In the figure: 1. disconnector; 2. screw; 3. nut; 4. conductive sheet; 5. first wire; 6. protective cover; 7. limit hole; 8. first plug rod; 9. ear plate; 10. isolation plate; 11. fixing groove; 12. second plug rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides Figure 1-Figure 3 The illustrated disconnecting device for a lightning arrester comprises a disconnecting device 1 and a protective cover 6 covering the outside of the disconnecting device 1. By installing the protective cover 6, when the lightning arrester is damaged, the disconnecting device is actuated, and the exploded fragments are blocked by the protective cover 6, thereby effectively reducing the explosion range and the damage to the surrounding equipment, and solving the problem that after the disconnecting device for the lightning arrester explodes, the exploded fragments are easily splashed around, thereby damaging the surrounding equipment;

[0026] And considering that the separation device is exposed to natural environments such as wind, sun, rain, etc. for a long time after being put into operation, it is very easy to age over time. Therefore, after one to two years of operation, its own mechanical strength decreases significantly. Once it encounters strong winds or other external forces, it is easy to cause abnormal separation. Therefore, by installing the protective cover 6, the damage to the separation device by the external environment is reduced, and the service life of the separation device is extended.

[0027] Furthermore, screws 2 are provided at both ends of the disconnector 1, nuts 3 and conductive sheets 4 are movably provided at the outer rings of the two screws 2, the upper conductive sheet 4 is electrically connected to the external high-voltage wire through the first wire 5, and the lower conductive sheet 4 is electrically connected to the high-voltage end of the external lightning arrester through the second wire;

[0028] The utility model adopts a power station type installation method to install the disconnecting device. Specifically, the conductive sheet 4 is first inserted into the screw rod 2, and then the conductive sheet 4 is tightened between the screw rod 2 and the disconnector 1 through the nut 3 to avoid poor contact between the conductive sheet 4 and the screw rod 2. The operation is simple and convenient.

[0029] Among them, a limiting hole 7 is fixedly set on one side of the top of the protective cover 6, and the end of the first wire 5 away from the conductive sheet 4 can move through the limiting hole 7 and extend out of the outside of the protective cover 6, so that the protective cover 6 will not hinder the connection between the first wire 5 and the external high-voltage wire, and the inner wall of the limiting hole 7 is fixedly provided with elastic glue, and a second through hole is provided in the middle of the elastic glue, and a first sealing glue layer is coated between the second through hole and the first wire 5, so as to prevent rainwater from penetrating into the inside of the protective cover 6 through the second through hole and keep the inside of the protective cover 6 dry.

[0030] Considering that most previous designs use silicone rubber sealant or epoxy tape to be applied to the threaded mouth or nut of the disconnector 1 and then tightened, long-term exposure to nature will age itself, and with the high and low temperature cycles in different seasons or day and night, the sealing surface will fail over time, causing the internal heating element to get damp, therefore, isolation plates 10 are fixedly provided at both ends of the disconnector 1, and the screw 2 passes through the two sides of the isolation plate 10. The isolation plate 10 is made of polyurethane waterproof material, and a second sealant layer is coated between the isolation plate 10 and the disconnector 1, thereby improving the sealing performance of the disconnector 1 and ensuring stable operation. By installing the protective cover 6, the direct effect of rain on the disconnector 1 is avoided, thereby preventing the internal heating element of the disconnector 1 from getting damp.

[0031] In order to facilitate the installation of the protective cover 6 on the disconnector 1, the utility model fixes the protective cover 6 and the disconnector 1 through a fixing assembly, the fixing assembly includes a first plug rod 8 and a fixing groove 11, two first plug rods 8 are provided, and the two first plug rods 8 are fixedly installed on the inner wall of the top of the protective cover 6, and the two ends of the nut 3 are fixedly provided with ear plates 9, and the ear plates 9 are provided with first through holes, and the first through holes are adapted to the first plug rod 8, and the fixing groove 11 is fixedly provided on the isolation plate 10, and the lower end of the first plug rod 8 is adapted to the fixing groove 11;

[0032] Specifically, when the nut 3 tightens the conductive sheet 4 onto the disconnector 1, the fixing groove 11 and the first through hole correspond to each other in the vertical position, so that the first plug rod 8 can be inserted into the first through hole and the fixing groove 11 in turn, so that the lower end of the first plug rod 8 and the fixing groove 11 are engaged with each other, which is convenient for fixing the connection between the protective cover 6 and the disconnector 1 without causing damage to the disconnector 1 itself.

[0033] In addition, the position of the nut 3 is limited by the first insertion rod 8, and even if the disconnector 1 shakes and sways under the action of wind, the nut 3 will not loosen, thereby improving the installation strength of the disconnector.

[0034] Furthermore, the ear plate 9 on the lower nut 3 and the fixing groove 11 on the lower isolation plate 10 are fixedly connected by a second insertion rod 12. Similarly, the second insertion rod 12 is inserted into the ear plate 9 on the lower nut 3 and the fixing groove 11 on the lower isolation plate 10 in sequence to prevent the lower nut 3 from loosening and improve the overall installation stability of the disengagement device.

[0035] Furthermore, the height of the bottom of the protective cover 6 is less than the height of the bottom of the detacher 1, so that when the detacher explodes, fragments will not fly around, reducing the explosion range.

[0036] Furthermore, the inner wall of the protective cover 6 is provided with an air cavity filled with SF6 gas. When the disconnector 1 bursts, the air cavity is broken by fragments, releasing the internal SF6 gas, effectively isolating the air and avoiding secondary damage caused by sparks.

Claims

1. A disconnecting device for a lightning arrester, comprising a disconnecting device (1) and a protective cover (6) covering the outside of the disconnecting device (1), characterized in that: The protective cover (6) is fixedly connected to the disconnector (1) via a fixing assembly, and screw rods (2) are provided at both ends of the disconnector (1), and nuts (3) and conductive sheets (4) are movably provided at the outer rings of the two screw rods (2), the upper conductive sheet (4) is electrically connected to an external high-voltage conductor via a first conductive wire (5), and the lower conductive sheet (4) is electrically connected to a high-voltage end of an external lightning arrester via a second conductive wire; A limiting hole (7) is fixedly provided on one side of the top of the protective cover (6); an end of the first conductive wire (5) away from the conductive sheet (4) movably passes through the limiting hole (7) and extends out of the outside of the protective cover (6); isolation plates (10) are fixedly provided at both ends of the disconnector (1); and the screw rod (2) passes through two side surfaces of the isolation plate (10); The fixing assembly comprises a first plug rod (8) and a fixing groove (11), wherein two first plug rods (8) are provided, and the two first plug rods (8) are fixedly mounted on the inner wall at the top of the protective cover (6), and ear plates (9) are fixedly mounted at both ends of the nut (3), and a first through hole is arranged on the ear plate (9), and the first through hole is matched with the first plug rod (8), and the fixing groove (11) is fixedly mounted on the isolation plate (10), and the lower end of the first plug rod (8) is matched with the fixing groove (11), and when the nut (3) tightens the conductive sheet (4) on the disconnector (1), the fixing groove (11) and the first through hole correspond to each other in a vertical position.

2. A release device for a lightning arrester according to claim 1, characterized in that: The inner wall of the limiting hole (7) is fixedly provided with elastic glue, a second through hole is provided in the middle of the elastic glue, and a first sealing glue layer is coated between the second through hole and the first wire (5).

3. A release device for a lightning arrester according to claim 1, characterized in that: A second sealant layer is coated between the isolation plate (10) and the separator (1).

4. A release device for a lightning arrester according to claim 3, characterized in that: The ear plate (9) on the lower nut (3) and the fixing groove (11) on the lower isolation plate (10) are fixedly connected via a second insertion rod (12).

5. A release device for a lightning arrester according to claim 3, characterized in that: The height of the bottom of the protective cover (6) is smaller than the height of the bottom of the disconnector (1).

6. A release device for a lightning arrester according to claim 5, characterized in that: The inner wall of the protective cover (6) is provided with an air cavity, and the air cavity is filled with SF6 gas.

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