Testing device based on transformer bushing

Abstract

The invention discloses a testing device based on a transformer bushing, and relates to the technical field of transformer bushings, the testing device comprises a first clamping ring and a second clamping ring, the second clamping ring is installed on the inner wall of the first clamping ring, and a clamping groove is formed in the surface of one side of the first clamping ring; connecting sleeves are fixedly installed on the inner wall of the first clamping ring and the inner wall of the second clamping ring correspondingly. The worm is driven by the driving motor to be in meshing transmission with the gear, and in the process of driving the clamping ring to be automatically closed, linkage of two sets of assemblies including the elastic contact piece which compresses the extrusion spring to provide constant pressing force and the trigger rod which pushes the multiple clamping rods to stretch out through the inclined face during retraction is ingeniously cooperated; the rapid clamping and fixing effect is achieved, and therefore the defects that in the prior art, due to the fact that a manual mounting and dismounting mode is relied on, potential induced electricity or residual charges of the transformer harm life safety of operators, and in addition, the process is tedious and time-consuming during aloft work, and the detection efficiency is seriously restricted are overcome.

Description

Technical Field

[0001] This invention relates to the field of transformer bushing technology, and in particular to a testing device based on transformer bushings. Background Technology

[0002] Transformer bushings are one of the key pieces of equipment in high-voltage power transmission and transformation systems, and their insulation condition directly affects the safe and stable operation of the power grid. To promptly detect potential insulation defects, preventative tests are required on transformer bushings periodically, such as dielectric loss angle measurement, capacitance measurement, and partial discharge detection. During these tests, specialized testing equipment or fixtures must be used and mounted on the transformer bushing to ensure a reliable electrical connection between the testing equipment and the bushing's measuring terminals (such as the end-screen test bolts).

[0003] Current technology typically uses alligator clips or spring clips to test transformer bushings. During testing, operators hold the clamps and fix them to the test terminals (test bolts) on the surface of the transformer bushing. The condition of the transformer bushing is then tested using a resistance and current detection device. This method, which relies entirely on manual installation and disassembly, not only exposes operators to significant risks in high-voltage substation environments, but also poses serious safety hazards due to the potential induced current or residual charge in the transformer. Furthermore, this process is cumbersome and time-consuming when working at heights, severely limiting testing efficiency. To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0004] The purpose of this invention is to achieve rapid clamping and fixing by using a drive motor to drive a worm gear and gear meshing transmission, which ingeniously coordinates the elastic contact piece that uses a compression spring to provide constant pressing force and the trigger rod that uses an inclined surface to push multiple clamping rods out when retracted. This overcomes the shortcomings of existing technologies that rely on manual installation and disassembly, which not only exposes operators to great risks in high-voltage substation environments but also poses serious safety hazards due to potential induced electricity or residual charge in the transformer. Furthermore, this process is cumbersome and time-consuming when working at heights, severely limiting the efficiency of the inspection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a testing device based on transformer bushings, comprising a first clamping ring and a second clamping ring, the second clamping ring being installed on the inner wall of the first clamping ring, a snap-fit ​​groove being provided on one side surface of the first clamping ring, connecting sleeves being fixedly installed on the inner walls of both the first and second clamping rings, a connecting shaft being rotatably installed on the inner wall of the connecting sleeve, a gear being fixedly installed on the outer surface of one of the connecting sleeves, an extension tube being provided on the inner wall of the snap-fit ​​groove, a drive shaft being rotatably installed on the inner wall of the extension tube, a worm gear being provided on the outer surface of the drive shaft, a drive motor being fixedly installed on one side surface of the inner wall of the first clamping ring, and detection clamping components and fixing components being provided on the inner walls of the first and second clamping rings; The detection clamping assembly includes a sliding groove, which is formed on one side surface of the first clamping ring and the second clamping ring. A clamping plate is slidably installed on the inner wall of the sliding groove. An elastic contact piece is fixedly installed on one side surface of the clamping plate. A limit plate is fixedly installed on one side surface of the inner wall of the first clamping ring and the second clamping ring. A compression block is provided on one side surface of the clamping plate. A compression spring is fixedly installed on one side surface of the compression block.

[0006] Furthermore, the first clamping ring and the second clamping ring are rotatably connected by a connecting sleeve and a connecting shaft. The inner wall of the snap-fit ​​groove is in sliding contact with the outer surface of the extension tube. The drive shaft extends through the inner wall of the extension tube to the interior of the first clamping ring. The worm and the gear mesh with each other. The output end of the drive motor is fixedly connected to one end of the drive shaft.

[0007] Furthermore, the sliding groove consists of two grooves respectively distributed on one side surface of the first clamping ring and the second clamping ring. Clamping plates are correspondingly distributed on the inner walls of both sliding grooves, and elastic contact pieces are correspondingly distributed on one side surface of each clamping plate.

[0008] Furthermore, the elastic contact piece is made of copper sheet, the clamping plate is slidably connected to the inner wall of the sliding groove, one end of the compression spring is fixedly connected to one side surface of the limiting plate, and the other end of the compression spring is fixedly connected to one side surface of the compression block.

[0009] Furthermore, the fixing assembly includes a displacement groove, which is formed on the inner walls of the first clamping ring and the second clamping ring. An extension groove is formed on one side surface of the first and second clamping rings. A clamping rod is slidably mounted on the inner wall of the extension groove. A contact rubber is fixedly mounted on one end of the clamping rod, and a contact shaft is fixedly mounted on the other end of the clamping rod. A trigger rod is slidably mounted on the inner wall of the displacement groove. A return spring is mounted on the outer surface of the trigger rod. A return groove is provided on the inner wall of the displacement groove. Control lines are mounted on both ends of the connecting shaft.

[0010] Furthermore, there are several protruding slots, which are arranged in a circular array and equidistantly distributed on one side surface of the first clamping ring and the second clamping ring. Each protruding slot has a corresponding clamping rod distributed on its inner wall, and each clamping rod has a corresponding contact rubber at one end. The trigger rod has several inclined surfaces on one side surface.

[0011] Furthermore, each of the clamping rods has a corresponding contact shaft at its other end, which slides in contact with one side surface of the trigger rod. Each trigger rod has a corresponding return spring on its outer surface, and the two trigger rods have one end in contact. Each displacement groove has a return groove inside.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: This transformer bushing-based testing device uses a drive motor to drive a worm gear and gear meshing transmission. During the automatic closing of the clamping ring, it ingeniously coordinates two sets of components: an elastic contact piece that uses a compression spring to provide constant pressing force, and a trigger rod that uses an inclined surface to push multiple clamping rods out when retracted. This achieves a rapid clamping and fixing effect, thus overcoming the shortcomings of existing technologies that rely on manual installation and disassembly. In high-voltage substation environments, this not only exposes operators to great risks, but also poses serious safety hazards due to potential induced electricity or residual charge in the transformer. Furthermore, the process is cumbersome and time-consuming when working at heights, severely limiting the efficiency of testing. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall external structure of the present invention is shown; Figure 2 A top-down view structural schematic diagram of the present invention is shown; Figure 3 A schematic diagram of another external state structure of the present invention is shown; Figure 4 This diagram shows a schematic representation of the overall external structure of the present invention from another angle. Figure 5 A schematic diagram of the overall internal structure of the present invention is shown; Figure 6 This diagram shows another angle of the overall internal structure of the present invention; Figure 7 A schematic diagram of the internal structure of the first clamping ring and the second clamping ring of the present invention is shown; Figure 8 A schematic diagram of the internal structure of the second clamping ring of the present invention is shown; Figure 9 A schematic diagram of the internal structure of the first clamping ring of the present invention is shown; Figure 10 A schematic diagram of the internal structure of the first clamping ring of the present invention at another angle is shown.

[0014] Legend: 1. First clamping ring; 101. Second clamping ring; 102. Snap-fit ​​groove; 103. Connecting sleeve; 104. Connecting shaft; 105. Gear; 106. Extension tube; 107. Drive shaft; 108. Worm gear; 109. Drive motor; 2. Sliding groove; 201. Clamping plate; 202. Elastic contact piece; 203. Limiting plate; 204. Extrusion block; 205. Extrusion spring; 3. Displacement groove; 301. Extension groove; 302. Clamping rod; 303. Contact rubber; 304. Contact shaft; 305. Trigger rod; 306. Return spring; 307. Return groove; 308. Control line. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0017] like Figures 1-10As shown, a test device based on a transformer bushing includes a first clamping ring 1 and a second clamping ring 101. The second clamping ring 101 is installed on the inner wall of the first clamping ring 1. The first clamping ring 1 and the second clamping ring 101 are rotatably connected by a connecting sleeve 103 and a connecting shaft 104. A snap-fit ​​groove 102 is provided on one side surface of the first clamping ring 1. The inner wall of the snap-fit ​​groove 102 slides in contact with the outer surface of the extension tube 106. A connecting sleeve 103 is fixedly installed on the inner wall of both the first clamping ring 1 and the second clamping ring 101. A connecting shaft 104 is rotatably installed on the inner wall of the connecting sleeve 103. The outer side of one of the connecting sleeves 103... A gear 105 is fixedly mounted on the surface. An extension tube 106 is provided on the inner wall of the snap-fit ​​groove 102. A drive shaft 107 is rotatably mounted on the inner wall of the extension tube 106. A worm gear 108 is provided on the outer surface of the drive shaft 107. A drive motor 109 is fixedly mounted on one side of the inner wall of the first clamping ring 1. Detection clamping components and fixing components are provided on the inner walls of the first clamping ring 1 and the second clamping ring 101. The drive shaft 107 extends into the interior of the first clamping ring 1 through the inner wall of the extension tube 106. The worm gear 108 and the gear 105 mesh with each other. The output end of the drive motor 109 is fixedly connected to one end of the drive shaft 107.

[0018] In this embodiment of the invention, when a transformer bushing testing device is required, the first clamping ring 1 and the second clamping ring 101 in their open state are placed on the outer surface of the transformer bushing, and the opening and closing of the first clamping ring 1 and the second clamping ring 101 are aligned with the test bolts on the surface of the transformer bushing. After alignment, the drive motor 109 is started by remote control. When the drive motor 109 is started, it will drive the worm gear 108 installed at its output end to rotate. The worm gear 108 and the gear 105 are meshed with each other. Therefore, when the drive motor 109 is started, the gear 105 driven by the worm gear 108 will drive the second clamping ring 101 to rotate on the inner wall of the first clamping ring 1 through the connecting sleeve 103, so that the first clamping ring 1 and the second clamping ring 101 gradually form a closed posture.

[0019] Reference Figures 1-10Specifically, the detection clamping assembly includes a sliding groove 2, which is formed on one side surface of the first clamping ring 1 and the second clamping ring 101. A clamping plate 201 is slidably mounted on the inner wall of the sliding groove 2, and an elastic contact piece 202 is fixedly mounted on one side surface of the clamping plate 201. There are two sliding grooves 2, respectively distributed on one side surface of the first clamping ring 1 and the second clamping ring 101. The inner walls of both sliding grooves 2 are correspondingly distributed with clamping plates 201, and each clamping plate 201 has correspondingly distributed elastic contact pieces 202 on one side surface. 02. The elastic contact piece 202 is made of copper sheet. The clamping plate 201 is slidably connected to the inner wall of the sliding groove 2. One end of the compression spring 205 is fixedly connected to one side surface of the limiting plate 203, and the other end of the compression spring 205 is fixedly connected to one side surface of the compression block 204. The limiting plate 203 is fixedly installed on one side surface of the inner wall of the first clamping ring 1 and the second clamping ring 101. The compression block 204 is provided on one side surface of the clamping plate 201, and the compression spring 205 is fixedly installed on one side surface of the compression block 204.

[0020] In this embodiment of the invention, the elastic contact piece 202 is installed on one side surface of the clamping plate 201. Therefore, when the elastic contact piece 202 continuously presses the test bolt, the clamping plate 201 will also slide along the inner wall of the sliding groove 2 due to the force. The pressing block 204 installed on one side surface of the clamping plate 201 is equipped with a pressing spring 205. When the clamping plate 201 moves along the inner wall of the sliding groove 2, the pressing block 204 that moves with it will drive the pressing spring 205 to move. The other end of the pressing spring 205 is fixedly connected to one side surface of the limiting plate 203. Therefore, when the clamping plate 201 moves, the pressing spring 205 that moves with it will be pressed between the limiting plate 203 and the pressing block 204. Thus, the compressed pressing spring 205 provides a thrust to the clamping plate 201, so that the elastic contact piece 202 installed on one side surface of the clamping plate 201 can always be in contact with the test bolt, thereby facilitating the subsequent testing of the transformer bushing.

[0021] The fixing assembly includes a displacement groove 3, which is formed on the inner wall of the first clamping ring 1 and the second clamping ring 101. An extension groove 301 is formed on one side surface of the first clamping ring 1 and the second clamping ring 101. A clamping rod 302 is slidably mounted on the inner wall of the extension groove 301. A contact rubber 303 is fixedly mounted on one end of the clamping rod 302, and a contact shaft 304 is fixedly mounted on the other end. A trigger rod 305 is slidably mounted on the inner wall of the displacement groove 3. A return spring 306 is mounted on the outer surface of the trigger rod 305. A return groove 307 is provided on the inner wall of the displacement groove 3. Control lines 308 are installed at both ends of the connecting shaft 104. There are several extension grooves 301. Several protruding slots 301 are arranged in a ring array and equidistantly distributed on one side surface of the first clamping ring 1 and the second clamping ring 101. Each protruding slot 301 has a corresponding clamping rod 302 on its inner wall. Each clamping rod 302 has a corresponding contact rubber 303 at one end. One side surface of the trigger rod 305 has several inclined surfaces. The other end of each clamping rod 302 has a corresponding contact shaft 304. The contact shaft 304 slides in contact with one side surface of the trigger rod 305. Each outer side surface of the trigger rod 305 has a corresponding return spring 306. One end of two trigger rods 305 are in movable contact. Each displacement slot 3 has a return slot 307 inside.

[0022] Specific usage procedure: When a transformer bushing testing device is required, the first clamping ring 1 and the second clamping ring 101, in their open state, are placed on the outer surface of the transformer bushing, ensuring that the opening and closing of the first clamping ring 1 and the second clamping ring 101 are aligned with the test bolts on the surface of the transformer bushing. After alignment, the drive motor 109 is started via remote control. When the drive motor 109 starts, it drives the worm gear 108 installed at its output end to rotate. The worm gear 108 meshes with the gear 105, so when the drive motor 109 starts... When the gear 105, driven by the worm gear 108, rotates, it drives the second clamping ring 101 to rotate on the inner wall of the first clamping ring 1 via the connecting sleeve 103. This causes the first clamping ring 1 and the second clamping ring 101 to gradually form a closed posture. When the two rotate, the extension tube 106 slides along the inner wall of the snap-fit ​​groove 102 due to the change in the angle between the first clamping ring 1 and the second clamping ring 101. During the closing process of the first clamping ring 1 and the second clamping ring 101, since they have been aligned with the test bolt beforehand, the elastic contact piece 2... 02 will come into contact with the test bolt as the closing angle continues to decrease. When both elastic contact pieces 202 are in contact with one side surface of the test bolt, the two elastic contact pieces 202 will compress the test bolt. Since the elastic contact pieces 202 are installed on one side surface of the clamping plate 201, the clamping plate 201 will also slide along the inner wall of the sliding groove 2 due to the force when the elastic contact pieces 202 continuously compress the test bolt. The compression block 204 installed on one side surface of the clamping plate 201 has a compression spring 205 installed on one side. As the clamping plate 201 slides along the sliding groove When the inner wall of clamping plate 201 moves, the pressing block 204 that moves with it will drive the pressing spring 205 to move. The other end of the pressing spring 205 is fixedly connected to one side surface of the limiting plate 203. Therefore, when clamping plate 201 moves, the pressing spring 205 that moves with it will be squeezed between the limiting plate 203 and the pressing block 204. The compressed pressing spring 205 provides a thrust to clamping plate 201, so that the elastic contact piece 202 installed on one side surface of clamping plate 201 can always be in contact with the test bolt, which facilitates the subsequent testing of transformer bushing.

[0023] Simultaneously, as the first clamping ring 1 and the second clamping ring 101 rotate and gradually close, the trigger rods 305 extending from their ends will come into contact with each other. Since the first clamping ring 1 and the second clamping ring 101 are still continuously merging, the two trigger rods 305 that are in contact with each other will squeeze each other. At this time, the two squeezed trigger rods 305 will retract into the interior of the first clamping ring 1 and the second clamping ring 101. Since one side surface of the trigger rod 305 has an inclined surface, when the trigger rod 305 retracts into the interior of the displacement groove 3, the inclined surface will come into contact with the contact shaft 304 installed at one end of the clamping rod 302. Through the continuous movement of the trigger rod 305, the clamping rod 302 will be continuously squeezed, causing the clamping rod 302 to be output from the inner wall of the extension groove 301, and causing the contact rubber 303 installed at the end of the clamping rod 302 to come into contact with the outer surface of the transformer bushing. Finally, the outer surface of the transformer bushing is stably clamped by multiple clamping rods 302.

[0024] After clamping, the transformer bushing is inspected by connecting the detection harness through the elastic contact piece 202. When disassembly is required after inspection, the drive motor 109 is rotated in reverse by remote control. The first clamping ring 1 and the second clamping ring 101 are gradually separated by the drive shaft 107 and the worm gear 108. When they are fully open, the user can pull the control line 308 to remove the inspection device from the surface of the transformer bushing, achieving a quick disassembly effect.

[0025] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A testing device based on a transformer bushing, comprising a first clamping ring (1) and a second clamping ring (101), wherein the second clamping ring (101) is mounted on the inner wall of the first clamping ring (1), characterized in that: A snap-fit ​​groove (102) is provided on one side surface of the first clamping ring (1). A connecting sleeve (103) is fixedly installed on the inner wall of both the first clamping ring (1) and the second clamping ring (101). A connecting shaft (104) is rotatably installed on the inner wall of the connecting sleeve (103). A gear (105) is fixedly installed on the outer surface of the connecting sleeve (103). An extension tube (106) is provided on the inner wall of the snap-fit ​​groove (102). A drive shaft (107) is rotatably installed on the inner wall of the extension tube (106). A worm gear (108) is provided on the outer surface of the drive shaft (107). A drive motor (109) is fixedly installed on one side surface of the inner wall of the first clamping ring (1). A detection clamping assembly and a fixing assembly are provided on the inner walls of the first clamping ring (1) and the second clamping ring (101). The detection clamping assembly includes a sliding groove (2), which is formed on one side surface of the first clamping ring (1) and the second clamping ring (101). A clamping plate (201) is slidably installed on the inner wall of the sliding groove (2). An elastic contact piece (202) is fixedly installed on one side surface of the clamping plate (201). A limit plate (203) is fixedly installed on one side surface of the inner wall of the first clamping ring (1) and the second clamping ring (101). A pressing block (204) is provided on one side surface of the clamping plate (201). A pressing spring (205) is fixedly installed on one side surface of the pressing block (204).

2. The testing device based on transformer bushings according to claim 1, characterized in that, The first clamping ring (1) and the second clamping ring (101) are rotatably connected by a connecting sleeve (103) and a connecting shaft (104). The inner wall of the snap-fit ​​groove (102) is in sliding contact with the outer surface of the extension tube (106). The drive shaft (107) extends through the inner wall of the extension tube (106) into the interior of the first clamping ring (1). The worm (108) and the gear (105) mesh with each other. The output end of the drive motor (109) is fixedly connected to one end of the drive shaft (107).

3. The testing device based on transformer bushings according to claim 1, characterized in that, The sliding groove (2) consists of two grooves distributed on one side surface of the first clamping ring (1) and the second clamping ring (101), respectively. The inner walls of the two sliding grooves (2) are respectively distributed with clamping plates (201), and each clamping plate (201) has an elastic contact piece (202) distributed on one side surface.

4. The testing device based on transformer bushings according to claim 1, characterized in that, The elastic contact piece (202) is made of copper sheet. The clamping plate (201) is slidably connected to the inner wall of the sliding groove (2). One end of the compression spring (205) is fixedly connected to one side surface of the limiting plate (203), and the other end of the compression spring (205) is fixedly connected to one side surface of the compression block (204).

5. The testing device based on transformer bushings according to claim 1, characterized in that, The fixing component includes a displacement groove (3), which is formed on the inner wall of the first clamping ring (1) and the second clamping ring (101). An extension groove (301) is formed on one side surface of the first clamping ring (1) and the second clamping ring (101). A clamping rod (302) is slidably installed on the inner wall of the extension groove (301). A contact rubber (303) is fixedly installed at one end of the clamping rod (302), and a contact shaft (304) is fixedly installed at the other end of the clamping rod (302). A trigger rod (305) is slidably installed on the inner wall of the displacement groove (3). A return spring (306) is installed on the outer surface of the trigger rod (305). A return groove (307) is provided on the inner wall of the displacement groove (3). Control lines (308) are installed at both ends of the connecting shaft (104).

6. The test device based on transformer bushings according to claim 5, characterized in that, There are several extension slots (301), and the several extension slots (301) are distributed in a ring array at equal intervals on one side surface of the first clamping ring (1) and the second clamping ring (101). Each extension slot (301) has a corresponding clamping rod (302) on its inner wall, and each clamping rod (302) has a corresponding contact rubber (303) at one end. The trigger rod (305) has several inclined surfaces on one side surface.

7. The test device based on transformer bushings according to claim 5, characterized in that, Each of the clamping rods (302) has a corresponding contact shaft (304) at its other end. The contact shaft (304) slides in contact with one side surface of the trigger rod (305). Each of the trigger rods (305) has a corresponding return spring (306) on its outer surface. One end of each of the two trigger rods (305) is in contact with each other. Each of the displacement grooves (3) has a return groove (307) inside.

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