Lightning protection grounding fault diagnosis device of transformer substation

Abstract

The utility model discloses a lightning protection grounding fault diagnosis device of a transformer station, which comprises a diagnosis unit and a connection unit, the diagnosis unit comprises a storage box and a grounding resistance meter placed in the storage box, the top of the grounding resistance meter is connected with three test wires through interfaces, the end parts of two of the test wires are fixedly connected with grounding rods, and the connection unit is connected with the storage box. The device comprises a connecting rod fixedly connected to the end of one test line, a fixing block is fixedly connected to the end of the connecting rod, a fixing clamp is connected to the end of the connecting rod, and a round rod is arranged on one side of the fixing block in a penetrating mode. According to the utility model, the pull ring is pulled to pull the movable clamp to rotate, then the movable clamp and the fixed clamp are moved between the grounding wires, and the pull ring is loosened, so that the torsion spring drives the movable clamp to deflect, thereby clamping the grounding wires, and the grounding wires are secondarily limited through the limiting plate. Therefore, the grounding wire can be locked between the movable clamp and the fixed clamp and is not easy to fall off.

Description

TECHNICAL FIELD

[0001] The utility model relates to substation lightning protection technical field especially relates to a lightning protection grounding fault diagnosis device of substation. BACKGROUND

[0002] The lightning protection grounding device of substation is applicable to protecting electric power equipment from lightning damage, and the lightning protection grounding device is mainly composed of lightning connection device, down lead, ground wire, grounding body, grounding net and grounding resistance, so as to protect substation equipment and staff from lightning and electrostatic discharge and the like, and specifically, the lightning protection grounding system plays a role in the following ways: when lightning strikes, lightning current is introduced into grounding electrode through ground wire and diffused to underground to avoid damage. To ensure reliability, regular detection and maintenance are needed, and multi-stage grounding mode is adopted to improve safety, so that the safety operation of equipment during lightning strike can be ensured, and the stability and reliability of power system are guaranteed.

[0003] The grounding resistance meter is mainly used for measuring the grounding resistance of electrical equipment grounding device and lightning protection device, and in use, the test cable is manually connected with the grounding resistance meter and lightning protection ground connection, and the lightning protection ground connection can be fault diagnosed after multiple debugging. The test cable is connected with the ground wire through the crocodile clamp. The size of the existing test cable crocodile clamp is short, so that the contact area of the crocodile clamp and the ground wire is small. In the diagnosis process, if the worker or animal accidentally touches the test line, the crocodile clamp is easily pulled off from the ground wire. The worker not only needs to rewire, but also needs to debug the test data of the grounding resistance meter again. Therefore, the utility model provides a lightning protection grounding fault diagnosis device for substation. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the problems existing in the prior art, the utility model is proposed.

[0006] Therefore, the utility model aims to provide a lightning protection grounding fault diagnosis device for substation, which is applicable to solve the problem that the size of the existing test cable crocodile clamp is short, and in the diagnosis process, if the worker or animal accidentally touches the test line, the crocodile clamp is easily pulled off from the ground wire. The worker not only needs to rewire, but also needs to debug the test data of the grounding resistance meter again, which is inconvenient to use.

[0007] To solve the above technical problems, the utility model provides technical schemes as follows: A lightning protection grounding fault diagnosis device of a transformer substation, which comprises

[0008] A diagnosis unit, which comprises a storage box and a grounding resistance meter placed in the storage box, and three test lines are connected to the top of the grounding resistance meter through an interface, and the ends of two of the test lines are fixedly connected with grounding rods;

[0009] A connecting unit, which comprises a connecting rod fixedly connected to the end of one of the test lines, a fixed block fixedly connected to the end of the connecting rod, a fixed clamp connected to the end of the connecting rod, a round rod penetratingly arranged on one side of the fixed block, a movable clamp fixedly connected to the two ends of the round rod, a first torsional spring sleeved on the two ends of the round rod, one end of the first torsional spring fixedly connected to one side of the fixed block, the other end of the first torsional spring fixedly connected to the inner wall of the movable clamp, a connecting block fixedly connected to the inner wall of the fixed clamp, a limiting plate rotationally connected to the inner wall of the connecting block, a second torsional spring sleeved on the limiting plate, one end of the second torsional spring fixedly connected to the inner wall of the connecting block, and the other end of the second torsional spring fixedly connected to one side of the limiting plate, and the connecting unit further comprises a trigger assembly for pulling the movable clamp to open.

[0010] As a preferred scheme of the lightning protection grounding fault diagnosis device of the transformer substation, the trigger assembly comprises a limiting block fixedly connected to one side of the connecting rod, a handle fixedly connected to one side of the connecting rod, a pull ring slidingly arranged on the inner wall of the handle, a connecting rope fixedly connected to one side of the movable clamp, and one end of the connecting rope, which faces the handle, penetratingly passes through the limiting block and the handle and is fixedly connected with the pull ring.

[0011] As a preferred scheme of the lightning protection grounding fault diagnosis device of the transformer substation, one side of the movable clamp is fixedly connected with a copper plate, one side of the copper plate is fixedly connected with two contact points, and one side of the movable clamp is fixedly connected with an indicating lamp electrically connected with the two contact points.

[0012] As a preferred scheme of the lightning protection grounding fault diagnosis device of the transformer substation, the inner wall of the storage box is threadedly connected with a plurality of take-up rods, and the side of each of the plurality of take-up rods is provided with a spiral groove.

[0013] As a preferred scheme of the lightning protection grounding fault diagnosis device of the transformer substation, the inner wall of the storage box is fixedly connected with a plurality of rubber blocks, the plurality of rubber blocks are located on the same side as the take-up rods, and one side of the rubber block is provided with a through groove penetrating through the rubber block.

[0014] As a preferred scheme of the lightning protection grounding fault diagnosis device of the transformer substation, the two grounding rods are fixed with the spiral rods, and the spiral rods are located close to the test line.

[0015] The utility model discloses the beneficial effect has: through pulling the pull ring, make the pull ring through the connecting rope traction movable clamp and rotate, then movable clamp and fixed clamp are moved to the grounding wire between, and loosen the pull ring, make the torsional spring drive movable clamp and deflect, thereby clamping the grounding wire, and through the limit board, the second position of the interface wire is limited, make the grounding wire can be locked between movable clamp and fixed clamp, and will not easily fall off, thereby conveniently worker peace of mind debugging grounding resistance meter, and carry out the fault diagnosis to the lightning protection ground. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings. Wherein:

[0017] Figure 1 The utility model discloses the lightning protection grounding fault diagnosis device overall structure schematic diagram of transformer substation;

[0018] Figure 2 The utility model discloses the connection unit structure schematic diagram;

[0019] Figure 3 The utility model discloses the first torsional spring and movable clamp connection relation structure schematic diagram;

[0020] Figure 4 The utility model discloses the second torsional spring and limit board connection relation structure schematic diagram.

[0021] BRIEF DESCRIPTION OF DRAWINGS: 100, diagnosis unit;101, storage box;102, grounding resistance meter;103, test line;104, grounding rod;105, take-up rod;106, rubber block;107, spiral rod;200, connection unit;201, connecting rod;202, fixed clamp;203, round rod;204, movable clamp;205, first torsional spring;206, trigger assembly;2061, limit block;2062, handle;2063, connecting rope;2064, pull ring;207, connecting block;208, limit plate;209, second torsional spring;210, copper plate;211, contact;212, indicator. DETAILED DESCRIPTION

[0022] In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0024] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0025] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0026] Embodiments

[0027] Reference Figure 1 - Figure 4 For one embodiment of the present application, a lightning protection grounding fault diagnosis device for a transformer substation is provided, comprising: a diagnosis unit 100 and a connection unit 200;

[0028] The diagnosis unit 100 comprises a storage box 101 and a grounding resistance meter 102 placed in the storage box 101, and the top of the grounding resistance meter 102 is connected with three test lines 103 through an interface, the end of two test lines 103 is fixedly connected with a grounding rod 104, and the two grounding rods 104 are fixedly sleeved with a spiral rod 107, and the position of the spiral rod 107 is close to the test line 103;

[0029] The connecting unit 200 comprises a connecting rod 201 fixedly connected at the end of one of the test lines 103, a fixed block is fixedly connected at the end of the connecting rod 201, a fixed clamp 202 is connected at the end of the connecting rod 201, a round rod 203 is arranged through one side of the fixed block, the two ends of the round rod 203 are fixedly connected with a movable clamp 204, the two ends of the round rod 203 are respectively sleeved with a first torsional spring 205, one end of the first torsional spring 205 is fixedly connected at one side of the fixed block, the other end of the first torsional spring 205 is fixedly connected at the inner wall of the movable clamp 204, the connecting unit 200 further comprises a trigger assembly 206 for pulling the movable clamp 204 to open, the trigger assembly 206 comprises a limiting block 2061 fixedly connected at one side of the connecting rod 201, a handle 2062 is fixedly connected at one side of the connecting rod 201, a pull ring 2064 is slidingly arranged at the inner wall of the handle 2062, a connecting rope 2063 is fixedly connected at one side of the movable clamp 204, one end of the connecting rope 2063 is arranged through the limiting block 2061 and the handle 2062 in sequence and is fixedly connected with the pull ring 2064, a connecting block 207 is fixedly connected at the inner wall of the fixed clamp 202, a limiting plate 208 is rotatably connected at the inner wall of the connecting block 207, a second torsional spring 209 is sleeved on the limiting plate 208, one end of the second torsional spring 209 is fixedly connected at the inner wall of the connecting block 207, the other end of the second torsional spring 209 is fixedly connected at one side of the limiting plate 208.

[0030] The ground resistance meter 102 is used for measuring the ground resistance of the grounding device and the lightning protection device, and the working principle is that the measured resistance is compared with the known resistance through a proportioner, the balance is adjusted, and the value of the measured ground resistance is directly read out through the scale on the known resistance.

[0031] Then the worker manually takes the connecting rod 201, one hand stabilizes the handle 2062, and then pulls the pull ring 2064 with the fingers. The pull ring 2064 pulls the movable clamp 204 to deflect through the connecting rope 2063. At this time, the movable clamp 204 can be unfolded by rotating on the fixed block through the round rod 203. The worker can manually adjust the position of the connecting rod 201 so that the grounding wire is located between the movable clamp 204 and the fixed clamp 202. Then the grounding wire contacts the limiting plate 208, and the grounding wire will be deflected towards the side of the fixed clamp 202 by pressing the limiting plate 208. After adjusting the position of the connecting rod 201, the grounding wire is close to the end surface of the connecting rod 201, and then the grounding wire is no longer in contact with the limiting plate 208.

[0032] The limiting plate 208 is rotated and reset by the first torsional spring 205. At this time, the grounding wire is located between the limiting plate 208 and the connecting rod 201. Then the pull ring 2064 is released to rotate the movable clamp 204 through the two first torsional springs 205, and the fixed clamp 202 clamps the grounding wire. The limiting plate 208 is shaped like a few characters and is arranged in a few characters. When the connecting rod 201 is pulled, the grounding wire will contact the inner wall of the limiting plate 208 and limit the position of the grounding wire through the limiting plate 208 to prevent the mating wire from falling out of the movable clamp 204 and the fixed clamp 202. Thus, the worker can adjust the value of the grounding resistance meter 102, and use the test wire 103 connected with the connecting rod 201 to diagnose faults of the lightning protection grounding wire. When the detection is completed, the pull ring 2064 is pulled again to deflect the movable clamp 204 through the connecting rope 2063. When the movable clamp 204 is unfolded, the clamping of the grounding wire by the movable clamp 204 and the fixed clamp 202 is released.

[0033] Secondly, the copper plate 210 is fixedly connected to one side of the movable clamp 204. The copper plate 210 is fixedly connected to two contacts 211 on one side. The movable clamp 204 is fixedly connected to an indicating lamp 212 electrically connected to the two contacts 211.

[0034] When the fixed clamp 202 and the movable clamp 204 clamp the grounding wire, the two contacts 211 will contact the surface of the mating wire. When the grounding wire fails and carries current on the surface, the two contacts 211 will transmit the current to the indicating lamp 212 through the copper plate 210. The two pins of the indicating lamp 212 are positive and negative. When the two pins feel the current, the current generates light through the semiconductor material inside the indicating lamp 212. At this time, the indicating lamp 212 is electrified and lit, thereby quickly reminding the worker that the surface of the mating wire carries current, thereby improving the safety of the equipment.

[0035] Further, the inner wall of the storage box 101 is threadedly connected with a plurality of take-up rods 105, one side of each of the plurality of take-up rods 105 is provided with a spiral groove, the inner wall of the storage box 101 is fixedly connected with a plurality of rubber blocks 106, the plurality of rubber blocks 106 are located on the same side as the take-up rods 105, and one side of the rubber block 106 is provided with a through groove penetrating through the rubber block 106.

[0036] After the test is completed, the take-up rod 105 can be taken out from the inner wall of the storage box 101 by rotating the take-up rod 105, and then the test wire 103 is uniformly wound in the spiral groove of the take-up rod 105 to store the test wire 103, one side of the rubber block 106 is provided with a through hole matching the diameter of the test wire 103, so that the rubber block 106 can fix the end of the test wire 103 to prevent it from spreading from the take-up rod 105, so that the ground rod 104 can also be stored through the through hole of the rubber block 106, and the ground rod 104 is fixed on the inner wall of the storage box 101 through the plurality of rubber blocks 106, and the connecting rod 201 is placed together with the ground resistance meter 102 in the storage box 101.

[0037] During use, the ground resistance meter 102 is taken out, and the three test wires 103 are respectively inserted into the interfaces of the ground resistance meter 102, then the two ground rods 104 are respectively inserted into the ground, then the worker holds the handle 2062 with one hand, then pulls the ring 2064 with fingers, the ring 2064 drives the movable clamp 204 to deflect through the connecting rope 2063, at this time the movable clamp 204 is unfolded, the worker can manually adjust the position of the connecting rod 201 so that the ground wire is located between the movable clamp 204 and the fixed clamp 202, then the ring 2064 is loosened to make the movable clamp 204 rotate and reset through the two first torsional springs 205, and the fixed clamp 202 cooperates to clamp the ground wire;

[0038] The position of the ground wire can be limited by the limiting plate 208, when the fixed clamp 202 and the movable clamp 204 clamp the ground wire, the two contacts 211 will contact the surface of the interface wire, when the ground wire fails and the surface carries current, the two contacts 211 will transmit the current to the indicator lamp 212 through the copper plate 210, at this time the indicator lamp 212 is powered on to light up to quickly remind the worker that the surface of the interface wire carries current;

[0039] After the worker adjusts the value of the grounding resistance meter 102, the worker can use the test wire 103 connected with the connecting rod 201 to diagnose the fault of the lightning protection grounding wire, and when the detection is completed, the worker pulls the pull ring 2064 again to make the connecting rope 2063 pull the active clamp 204 to deflect, when the active clamp 204 is unfolded, the active clamp 204 and the fixed clamp 202 can be released from clamping the grounding wire, then the test wire 103 is wound on the winding rod 105, the grounding rod 104 is stored through the rubber block 106, finally the connecting rod 201 is placed in the storage box 101 together with the grounding resistance meter 102.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A lightning protection grounding fault diagnosis device for a substation, characterized by, The utility model relates to a portable ground resistance tester, including: Diagnosis unit (100) including the storage box (101) and the ground resistance meter (102) placed in the storage box (101), the top of ground resistance meter (102) is connected with three test lines (103) through the interface, wherein the end of two test lines (103) is fixedly connected with ground rod (104); Connecting unit (200) including the connecting rod (201) fixedly connected in one end of test line (103), the end of connecting rod (201) is fixedly connected with fixed block, the end of connecting rod (201) is connected with fixed clamp (202), one side of fixed block is provided with round bar (203) through, the both ends of round bar (203) are fixedly connected with movable clamp (204) in common, the both ends of round bar (203) are respectively equipped with first torsional spring (205), one end of first torsional spring (205) is fixedly connected in one side of fixed block, the other end of first torsional spring (205) is fixedly connected in the inner wall of movable clamp (204), the inner wall of fixed clamp (202) is fixedly connected with connecting block (207), the inner wall of connecting block (207) is rotatably connected with limit plate (208), the limit plate (208) is equipped with second torsional spring (209), one end of second torsional spring (209) is fixedly connected in the inner wall of connecting block (207), the other end of second torsional spring (209) is fixedly connected in one side of limit plate (208), connecting unit (200) still includes trigger assembly (206) for traction movable clamp (204) open.

2. The lightning protection and grounding fault diagnosis device for a substation according to claim 1, characterized in that: The trigger assembly (206) includes a limit block (2061) fixedly connected to one side of the connecting rod (201), one side of the connecting rod (201) is fixedly connected with a handle (2062), the inner wall of the handle (2062) is slidably provided with a pull ring (2064), one side of the movable clamp (204) is fixedly connected with a connecting rope (2063), one end of the connecting rope (2063) towards the handle (2062) is sequentially threaded through the limit block (2061) and the handle (2062) and fixedly connected with the pull ring (2064).

3. The lightning protection and grounding fault diagnosis device for a substation according to claim 1, characterized in that: One side of the movable clamp (204) is fixedly connected with a copper plate (210), one side of the copper plate (210) is fixedly connected with two contact points (211), one side of the movable clamp (204) is fixedly connected with an indicator light (212) electrically connected with the two contact points (211).

4. The lightning protection and grounding fault diagnosis device for a substation according to claim 1, characterized in that: The inner wall of the storage box (101) is threadedly connected with a plurality of wire collecting rods (105), and a plurality of the wire collecting rods (105) are provided with helical grooves on one side.

5. The lightning protection and grounding fault diagnosis device for a substation according to claim 4, characterized in that: The inner wall of the storage box (101) is fixedly connected with a plurality of rubber blocks (106), and the plurality of rubber blocks (106) are located on the same side as the wire collecting rods (105), and a through groove is formed in one side of the rubber block (106) and penetrates the rubber block (106).

6. The lightning protection and grounding fault diagnosis device for a substation according to claim 1, characterized in that: Two ground rods (104) are fixedly sleeved with a spiral rod (107), and the spiral rod (107) is located close to the test line (103).

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