Live-line testing device for leakage current of lightning arrester

Abstract

The invention belongs to the technical field of test equipment, and discloses a lightning arrester leakage current live-line test device which is technically characterized by comprising a base and a measuring instrument, a lightning arrester body is arranged at the top end of the base, an electric telescopic rod is arranged on the outer side of the base, and a supporting rod is arranged at the telescopic end of the electric telescopic rod; an arc-shaped bearing column is fixedly installed at the top end of the supporting rod, a storage cavity is formed in the bearing column, two sets of oppositely-distributed guide columns are slidably installed in the storage cavity, the bearing column is sleeved with a fixing ring, an induction plate is fixedly installed on the surface of the fixing ring, and a telescopic assembly is arranged in the bearing column; a control mechanism is arranged in the fixing ring, the control mechanism comprises a positioning assembly and a rotating assembly, and the problems that at present, an induction plate can only be located on one side of a lightning arrester for testing, the induction plate cannot conduct all-around testing treatment around the lightning arrester, and the use effect is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment, in particular to a live testing device for leakage current of a lightning arrester. Background Art

[0002] In the power system, zinc oxide lightning arrester is a very important overvoltage protection device. As the operation time of the lightning arrester increases, its internal valve plate resistance will have defects such as aging and moisture and internal faults. In order to facilitate the discovery of internal faults of zinc oxide lightning arresters, it is a very effective method to use a lightning arrester live tester to measure the total current and resistive current of the lightning arrester under the operating voltage. At present, there are two main methods for live testing of lightning arresters, namely the PT secondary method and the induction plate method. Among them, the PT secondary method requires the collection of its secondary voltage signal when the voltage transformer is running, which brings risks to the operation of the equipment, while the induction plate method only needs to place the induction plate near the base of the lightning arrester and use the induced voltage as a reference signal, so the induction plate method is safe and convenient to use and is also widely used.

[0003] When the induction plate method is used to test the arrester under power, the staff usually holds a rod to support the induction plate and places the induction plate close to the arrester body for testing. When using this existing testing method, the induction plate is prone to shaking, resulting in poor stability, and the induction plate can only be located on one side of the arrester for testing. The induction plate cannot perform a full range of testing around the arrester, resulting in poor use effect. Summary of the invention

[0004] The object of the present invention is to provide a live testing device for leakage current of a lightning arrester to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A lightning arrester leakage current live testing device, comprising a base and a measuring instrument, wherein a lightning arrester body is arranged at the top of the base, an electric telescopic rod is arranged at the outside of the base, a support rod is arranged at the telescopic end of the electric telescopic rod, an arc-shaped bearing column is fixedly installed at the top of the support rod, a storage cavity is opened inside the bearing column, and the two ends of the storage cavity are arranged as through structures, two groups of relatively distributed guide columns are slidably installed in the storage cavity, a fixing ring is sleeved on the outside of the bearing column, and an induction plate is fixedly installed on the surface of the fixing ring, one end of the measuring instrument is electrically connected to the lightning arrester body, and the other end of the measuring instrument is electrically connected to the induction plate, and a A telescopic component that cooperates with the guide column, the telescopic component is used to control the movement of the guide column in the storage cavity and thereby adjust the relative positions of the two groups of guide columns and the bearing column. A control mechanism that cooperates with the bearing column and the guide column is provided in the fixed ring, the control mechanism includes a positioning component and a rotating component, the positioning component is located in the inner cavity of the fixed ring, the positioning component is used to support and position the fixed ring on the outside of the bearing column and the guide column, the rotating component is connected to the positioning component, after the two groups of guide columns extend to the outside of the bearing column and fit each other, the rotating component controls the movement of the fixed ring on the surface of the bearing column and the guide column by cooperating with the positioning component.

[0006] As a further solution of the present invention: the telescopic assembly includes a side panel fixedly mounted on the surface of the support rod, a first motor fixedly mounted on the surface of the side panel, a group of guide columns located in the storage cavity have an arc-shaped first rack fixedly mounted on one end thereof, and another group of guide columns located in the storage cavity have an arc-shaped second rack fixedly mounted on one end thereof, the output shaft of the first motor extends into the storage cavity and is fixedly mounted with a transmission gear disk, the first rack and the second rack are respectively meshed with the transmission gear disk, and the side walls of the two groups of guide columns are respectively provided with arc-shaped grooves that cooperate with the first rack and the second rack.

[0007] As a further solution of the present invention: the positioning assembly includes a first extrusion spring fixedly installed on the top wall of the fixed ring, the telescopic end of the first extrusion spring is fixedly installed with an upper positioning frame, the upper positioning frame is an inverted U-shaped structure, and multiple groups of parallel distributed rotating rods are rotatably installed in the upper positioning frame, and a top roller is fixedly installed on the surface of the rotating rod, and a second extrusion spring is fixedly installed on the bottom wall of the fixed ring, and the telescopic end of the second extrusion spring is fixedly installed with a lower positioning frame, the lower positioning frame is a U-shaped structure, and a bottom roller is rotatably installed in the lower positioning frame, and the load-bearing column and the guide column are located between the top roller and the bottom roller.

[0008] As a further solution of the present invention: the rotating assembly includes a synchronous gear plate fixedly installed on the surface of a rotating rod, multiple groups of synchronous gear plates are commonly connected to a synchronous belt, and one end of a group of rotating rods extends to the outside of the upper positioning frame and is connected to a second motor.

[0009] As a further solution of the present invention: the bottom wall of the fixing ring is provided with a bottom groove which cooperates with the support rod and the output shaft of the first motor.

[0010] As a further solution of the present invention: a limiting groove is provided on the side wall of the storage cavity, and a limiting strip slidably connected to the limiting groove is fixedly installed on the side wall of the guide column.

[0011] As a further solution of the present invention: the side walls of the upper positioning frame and the lower positioning frame are fixedly mounted with transverse plates, and the inner top wall and the inner bottom wall of the fixing ring are respectively fixedly mounted with vertical rods slidably connected to the transverse plates.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting the telescopic assembly to cooperate with the bearing column, the relative positions of the two groups of guide columns and the bearing column can be conveniently adjusted, and then the guide column and the bearing column can be controlled to be in a closed ring around the outside of the arrester body; by setting the positioning assembly to cooperate with the rotating assembly, the fixed ring and the induction plate can be conveniently controlled to move in a circular trajectory around the arrester body, and then the arrester body can be fully tested. The problem that the current induction plate can only be located on one side of the arrester for testing, the induction plate cannot be fully tested around the arrester, and the use effect is poor is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a lightning arrester leakage current live testing device provided in an embodiment of the present invention.

[0014] Figure 2 The present invention is a schematic diagram of the main structure of a lightning arrester leakage current live testing device provided in an embodiment of the present invention.

[0015] Figure 3 The present invention is a schematic diagram of a bearing column and its connection structure in a live testing device for leakage current of a lightning arrester provided in an embodiment of the present invention.

[0016] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of A.

[0017] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of B.

[0018] Figure 6 The present invention is a schematic diagram of a fixing ring and its connection structure in a live testing device for leakage current of a lightning arrester provided in an embodiment of the present invention.

[0019] Figure 7 The present invention is a schematic diagram of an upper positioning frame and its connection structure in a live testing device for leakage current of a lightning arrester provided in an embodiment of the present invention.

[0020] Figure 8 The present invention is a schematic diagram of a guide column and its connection structure in a live testing device for leakage current of a lightning arrester provided in an embodiment of the present invention.

[0021] Among them: 1-base, 11-arrester body, 2-electric telescopic rod, 21-support rod, 3-measuring instrument, 4-bearing column, 41-storage cavity, 5-guide column, 6-telescopic assembly, 61-side plate, 62-first motor, 63-first rack, 64-second rack, 65-transmission gear disc, 66-arc groove, 7-fixing ring, 71-sensing plate, 8-control mechanism, 81-positioning assembly, 811-first extrusion spring, 812-upper positioning frame, 813-rotating rod, 814-top roller, 815-second extrusion spring, 816-lower positioning frame, 817-bottom roller, 82-rotating assembly, 821-synchronous gear disc, 822-synchronous belt, 823-second motor, 9-bottom groove, 10-limiting groove, 101-limiting strip, 12-horizontal plate, 121-vertical rod. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, it is a structural diagram of a lightning arrester leakage current live test device provided by an embodiment of the present invention, comprising a base 1 and a measuring instrument 3, a lightning arrester body 11 is arranged on the top of the base 1, an electric telescopic rod 2 is arranged on the outside of the base 1, a support rod 21 is arranged on the telescopic end of the electric telescopic rod, an arc-shaped bearing column 4 is fixedly installed on the top of the support rod 21, a storage cavity 41 is opened inside the bearing column 4, both ends of the storage cavity 41 are set as through structures, two groups of relatively distributed guide columns 5 are slidably installed in the storage cavity 41, a fixing ring 7 is sleeved on the outside of the bearing column 4, a sensing plate 71 is fixedly installed on the surface of the fixing ring 7, one end of the measuring instrument 3 is electrically connected to the lightning arrester body 11, and the other end of the measuring instrument 3 is electrically connected to the sensing plate 71, and the bearing A telescopic component 6 that cooperates with the guide column 5 is provided in the support column 4, and the telescopic component 6 is used to control the movement of the guide column 5 in the storage cavity 41 to thereby adjust the relative positions of the two groups of guide columns 5 and the support column 4. A control mechanism 8 that cooperates with the support column 4 and the guide column 5 is provided in the fixed ring 7, and the control mechanism 8 includes a positioning component 81 and a rotating component 82. The positioning component 81 is located in the inner cavity of the fixed ring 7, and the positioning component 81 is used to support and position the fixed ring 7 on the outside of the support column 4 and the guide column 5. The rotating component 82 is connected to the positioning component 81. After the two groups of guide columns 5 extend to the outside of the support column 4 and fit each other, the rotating component 82 controls the movement of the fixed ring 7 on the surface of the support column 4 and the guide column 5 by cooperating with the positioning component 81.

[0025] The base 1 supports and positions the arrester body 11. Initially, the telescopic assembly 6 controls the two groups of guide columns 5 to be located in the storage cavity 41 as a whole. When the arrester body 11 needs to be tested with power, the electric telescopic rod 2 is placed next to the base 1, the support rod 21 is located at the top of the electric telescopic rod 2 and is supported and positioned with the sensing plate 71, and the measuring instrument 3 is connected to the arrester body 11 and the sensing plate 71 respectively. The electric telescopic rod 2 pushes the support rod 21 and the bearing column 4 to move upward and then pushes the sensing plate 71 to move upward synchronously. At this time, the notch position on the surface of the bearing column 4 is aligned with the arrester body 11, and the telescopic assembly 6 controls the two groups of guide columns 5 to rotate relative to each other from both ends of the bearing column 4. The two ends of the two groups of guide columns 5 outside the bearing column 4 fit each other, and the two groups of guide columns 5 cooperate with the bearing column 4 to form a closed ring structure and are sleeved on the outside of the arrester body 11. At this time, the induction plate 71 is located at the arrester body 11 to sense the current signal of the arrester body 11. The measuring instrument 3 can perform a live test on the arrester body 11. During the test, the rotating assembly 82 cooperates with the positioning assembly 81 to control the fixed ring 7 to move on the surface of the bearing column 4 and the guide column 5. The fixed ring 7 drives the induction plate 71 to rotate synchronously around the arrester body 11. The induction plate 71 can perform a 360-degree all-round induction test on the arrester body 11. After the test is completed, the rotating assembly 82 cooperates with the positioning assembly 81 to control the fixed ring 7 to move to the surface of the bearing column 4. The telescopic assembly 6 controls the two groups of guide columns 5 to move in the opposite direction to the storage cavity 41. At this time, a notch appears on the surface of the bearing column 4, and the bearing column 4 can be easily removed from the outside of the arrester body 11.

[0026] like Figure 1 , Figure 3 , Figure 5 , Figure 8 As shown, as a preferred embodiment of the present invention, the telescopic assembly 6 includes a side plate 61 fixedly mounted on the surface of the support rod 21, a first motor 62 fixedly mounted on the surface of the side plate 61, a group of guide columns 5 are located in the storage cavity 41 and one end thereof is fixedly mounted with an arc-shaped first rack 63, and another group of guide columns 5 are located in the storage cavity 41 and one end thereof is fixedly mounted with an arc-shaped second rack 64, the output shaft of the first motor 62 extends into the storage cavity 41 and is fixedly mounted with a transmission gear disc 65, the first rack 63 and the second rack 64 are respectively meshed and connected with the transmission gear disc 65, and the side walls of the two groups of guide columns 5 are respectively provided with arc-shaped grooves 66 that cooperate with the first rack 63 and the second rack 64.

[0027] Initially, the two groups of guide posts 5 are in the storage chamber 41 as a whole. When the arrester body 11 needs to be tested, the first motor 62 drives the transmission gear disc 65 to rotate, and the transmission gear disc 65 is respectively engaged with the first rack 63 and the second rack 64 for transmission, which can push the two groups of guide posts 5 to extend from the two ends of the storage chamber 41 to the outside of the bearing column 4. The two groups of guide posts 5 cooperate with the bearing column 4 to form a closed annular structure and the arrester body 11 is sleeved therein. The fixed ring 7 moves along the surface of the bearing column 4 and the guide post 5, so that the arrester body 11 can be tested in all directions. After the test is completed, the first motor 62 drives the transmission gear disc 65 to reverse, and the transmission gear disc 65 is respectively engaged with the first rack 63 and the second rack 64 for transmission, which can control the two groups of guide posts 5 to move into the storage chamber 41 respectively.

[0028] like Figure 2 , Figure 4 , Figure 6 , Figure 7 As shown, as a preferred embodiment of the present invention, the positioning assembly 81 includes a first extrusion spring 811 fixedly installed on the inner top wall of the fixing ring 7, the telescopic end of the first extrusion spring 811 is fixedly installed with an upper positioning frame 812, the upper positioning frame 812 is an inverted U-shaped structure, and multiple groups of parallel distributed rotating rods 813 are rotatably installed in the upper positioning frame 812, and a top roller 814 is fixedly installed on the surface of the rotating rod 813, and a second extrusion spring 815 is fixedly installed on the inner bottom wall of the fixing ring 7, and the telescopic end of the second extrusion spring 815 is fixedly installed with a lower positioning frame 816, the lower positioning frame 816 is a U-shaped structure, and a bottom roller 817 is rotatably installed in the lower positioning frame 816, and the load-bearing column 4 and the guide column 5 are located between the top roller 814 and the bottom roller 817.

[0029] The first extrusion spring 811 applies a thrust to the upper positioning frame 812 so that the top roller 814 contacts the upper surface of the bearing column 4, and the second extrusion spring 815 applies a thrust to the lower positioning frame 816 so that the bottom roller 817 contacts the lower surface of the bearing column 4. The top roller 814 and the bottom roller 817 cooperate with each other to stably clamp the fixing ring 7 on the outside of the bearing column 4. After the two groups of guide columns 5 move to the outside of the bearing column 4 and are tested, the rotating assembly 82 controls the rotation of the multiple groups of rotating rods 813, and the rotating rods 813 drive the top roller 814 to roll on the surface of the bearing column 4, thereby driving the fixing ring 7 to move along the surface of the bearing column 4. When the fixing ring 7 moves to the surface of the guide column 5, the first extrusion spring 811 and the second extrusion spring 815 can adjust the positions of the upper positioning frame 812 and the lower positioning frame 816 so that the top roller 814 and the bottom roller 817 contact the guide column 5.

[0030] like Figure 2 , Figure 4 , Figure 6 , Figure 7 As shown, as a preferred embodiment of the present invention, the rotating assembly 82 includes a synchronous gear plate 821 fixedly installed on the surface of the rotating rod 813, multiple groups of synchronous gear plates 821 are commonly connected to a synchronous belt 822, and one end of a group of rotating rods 813 extends to the outside of the upper positioning frame 812 and is connected to a second motor 823.

[0031] When in use, the second motor 823 drives a group of rotating rods 813 to rotate and then drives the synchronous gear plate 821 to rotate. Multiple groups of synchronous gear plates 821 cooperate with the synchronous belt 822 to drive multiple groups of rotating rods 813 to rotate synchronously. The rotating rods 813 drive the top roller 814 to rotate, and then drive the fixing ring 7 to move along the surface of the supporting column 4 and the guide column 5.

[0032] like Figure 1 , Figure 2 , Figure 6 As shown, as a preferred embodiment of the present invention, the bottom wall of the fixing ring 7 is provided with a bottom groove 9 which cooperates with the support rod 21 and the output shaft of the first motor 62 .

[0033] The bottom groove 9 facilitates the fixing ring 7 to pass through the top end of the support rod 21 and the output shaft position of the first motor 62 .

[0034] like Figure 3 , Figure 5 As shown, as a preferred embodiment of the present invention, a limiting groove 10 is provided on the side wall of the storage cavity 41 , and a limiting strip 101 slidably connected to the limiting groove 10 is fixedly mounted on the side wall of the guide column 5 .

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, as a preferred embodiment of the present invention, the side walls of the upper positioning frame 812 and the lower positioning frame 816 are fixedly mounted with a horizontal plate 12, and the inner top wall and the inner bottom wall of the fixing ring 7 are respectively fixedly mounted with vertical rods 121 slidably connected to the horizontal plate 12.

[0036] The working principle of the present invention is: the base 1 supports and positions the lightning arrester body 11. Initially, the two groups of guide columns 5 are integrally located in the storage cavity 41. When the lightning arrester body 11 needs to be tested under power, the electric telescopic rod 2 is placed next to the base 1. The support rod 21 is located at the top of the electric telescopic rod 2 and supports and positions the induction plate 71. The measuring instrument 3 is respectively connected to the lightning arrester body 11 and the induction plate 71. The electric telescopic rod 2 pushes the support rod 21 and the bearing column 4 to move upward and then pushes the induction plate 71 to move upward synchronously. At this time, the notch position on the surface of the bearing column 4 is aligned with the lightning arrester body 11.

[0037] The first motor 62 drives the transmission gear disc 65 to rotate, and the transmission gear disc 65 is respectively engaged with the first rack 63 and the second rack 64 for transmission, which can push the two groups of guide posts 5 to extend from the two ends of the storage cavity 41 to the outside of the bearing column 4, respectively. The two groups of guide posts 5 cooperate with the bearing column 4 to form a closed ring structure and the arrester body 11 is set therein. After the two groups of guide posts 5 move to the outside of the bearing column 4 and are tested, the second motor 823 drives a group of rotating rods 813 to rotate and then drives the synchronous gear disc 821 to rotate. Multiple groups of synchronous gear discs 821 cooperate with the synchronous belt 822 to drive multiple groups of rotating rods 813 to rotate synchronously, and the rotating rods 813 drive the top roller 814 to rotate, and then drive the fixed ring 7 to move along the surface of the bearing column 4 and the guide column 5. The fixed ring 7 drives the induction plate 71 to rotate synchronously around the arrester body 11, and the induction plate 71 can perform a 360-degree all-round induction test on the arrester body 11. After the test is completed, the fixing ring 7 moves to the surface of the bearing column 4, and the two groups of guide columns 5 move in the opposite direction into the receiving cavity 41. At this time, a notch appears on the surface of the bearing column 4, and the bearing column 4 can be easily removed from the outside of the arrester body 11.

[0038] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A lightning arrester leakage current live test device, comprising a base and a measuring instrument, wherein the lightning arrester body is arranged on the top of the base, an electric telescopic rod is arranged on the outside of the base, and a support rod is arranged at the telescopic end of the electric telescopic rod, characterized in that: An arc-shaped bearing column is fixedly installed at the top of the support rod, a storage cavity is opened inside the bearing column, and the two ends of the storage cavity are set as a through structure. Two groups of relatively distributed guide columns are slidably installed in the storage cavity, a fixing ring is sleeved on the outside of the bearing column, and a sensing plate is fixedly installed on the surface of the fixing ring. One end of the measuring instrument is electrically connected to the arrester body, and the other end of the measuring instrument is electrically connected to the sensing plate. A telescopic component that cooperates with the guide column is arranged in the bearing column, and the telescopic component is used to control the movement of the guide column in the storage cavity and thus adjust the relative position of the two groups of guide columns and the bearing column. A control mechanism that cooperates with the bearing column and the guide column is arranged in the fixing ring. The control mechanism includes a positioning component and a rotating component. The positioning component is located in the inner cavity of the fixing ring. The positioning component is used to support and position the fixing ring on the outside of the bearing column and the guide column. The rotating component is connected to the positioning component. After the two groups of guide columns extend to the outside of the bearing column and fit each other, the rotating component controls the movement of the fixing ring on the surface of the bearing column and the guide column by cooperating with the positioning component.

2. A lightning arrester leakage current live testing device according to claim 1, characterized in that: The telescopic assembly includes a side plate fixedly mounted on the surface of a support rod, a first motor fixedly mounted on the surface of the side plate, a group of guide columns located in the storage cavity have an arc-shaped first rack fixedly mounted on one end thereof, and another group of guide columns located in the storage cavity have an arc-shaped second rack fixedly mounted on one end thereof, the output shaft of the first motor extends into the storage cavity and is fixedly mounted with a transmission gear disk, the first rack and the second rack are respectively meshed with the transmission gear disk, and the side walls of the two groups of guide columns are respectively provided with arc-shaped grooves that cooperate with the first rack and the second rack.

3. A lightning arrester leakage current live testing device according to claim 1, characterized in that: The positioning assembly includes a first extrusion spring fixedly installed on the top wall of a fixed ring, an upper positioning frame fixedly installed on the telescopic end of the first extrusion spring, the upper positioning frame is an inverted U-shaped structure, a plurality of sets of parallelly distributed rotating rods are rotatably installed in the upper positioning frame, a top roller is fixedly installed on the surface of the rotating rod, a second extrusion spring is fixedly installed on the bottom wall of the fixed ring, a lower positioning frame is fixedly installed on the telescopic end of the second extrusion spring, the lower positioning frame is a U-shaped structure, a bottom roller is rotatably installed in the lower positioning frame, and a bearing column and a guide column are located between the top roller and the bottom roller.

4. A lightning arrester leakage current live testing device according to claim 3, characterized in that: The rotating assembly includes a synchronous gear plate fixedly installed on the surface of a rotating rod, multiple groups of synchronous gear plates are commonly connected to a synchronous belt, and one end of a group of rotating rods extends to the outside of the upper positioning frame and is connected to a second motor.

5. A lightning arrester leakage current live testing device according to claim 2, characterized in that: The bottom wall of the fixing ring is provided with a bottom groove which cooperates with the support rod and the output shaft of the first motor.

6. A lightning arrester leakage current live testing device according to claim 1, characterized in that: The side wall of the storage cavity is provided with a limiting groove, and the side wall of the guide column is fixedly mounted with a limiting strip which is slidably connected with the limiting groove.

7. A lightning arrester leakage current live testing device according to claim 3, characterized in that: The side walls of the upper positioning frame and the lower positioning frame are fixedly mounted with transverse plates, and the inner top wall and the inner bottom wall of the fixing ring are respectively fixedly mounted with vertical rods which are slidably connected with the transverse plates.

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