Substation high-voltage equipment electrical test wiring device based on angle conversion

Abstract

The invention discloses a transformer substation high-voltage equipment electrical test wiring device based on angle conversion, and relates to the technical field of transformer substation high-voltage wiring devices. The operation handle driving rod drives the sliding wheel to rotate, the sliding wheel rotates to drive the driving shaft to rotate, the driving shaft rotates to drive the driven shaft to rotate, and therefore the angle conversion driving rod is driven to rotate for angle adjustment; the insulating rod expansion joint movably pulls the lower tooth pull wire of the wiring device, the moving direction of the lower tooth pull wire is changed through the fixed pulley, the lower tooth of the wiring device is pulled to move upwards and is engaged with the upper tooth of the wiring device, and the high-altitude wiring action is completed. According to the invention, the traditional high-altitude operation is carried out on the ground, the danger caused by vehicle lifting and climbing is avoided, the operation safety is ensured, the working efficiency is improved, the wiring device can be accurately installed in place and firmly installed, and the measured value of the high-voltage electrical test is more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of high-voltage wiring devices for transformer substations, and relates to an electrical test wiring device for high-voltage equipment in transformer substations based on angle conversion. Background Art

[0002] Transformers, lightning arresters, and mutual inductors are the most important high-voltage equipment in substations, and their safe and reliable operation is of vital importance. Maintenance personnel need to regularly shut down power to conduct high-voltage electrical tests on high-voltage equipment. High-voltage electrical tests are tests of the insulation performance, internal parameters, etc. of high-voltage equipment. Operation and maintenance personnel can understand the operating status of high-voltage equipment through test data, promptly discover and eliminate internal defects of high-voltage equipment, and ensure safe and stable operation of high-voltage equipment.

[0003] With the large-scale construction of substations, the number of high-voltage equipment has increased exponentially, and the number of high-voltage electrical tests for power outages of high-voltage equipment has increased. During the high-voltage electrical test of high-voltage equipment, there are 7-10 different routine high-voltage electrical tests according to the different specifications and models of high-voltage equipment. Each high-voltage electrical test uses different test equipment to measure parameters. Therefore, during the test, the test equipment and test wiring need to be replaced many times. At present, the wiring of high-voltage electrical tests requires electrical test personnel to climb above the high-voltage equipment or be lifted to the wiring position of the high-voltage equipment by a boom truck. There are risks in the high-altitude work of electrical test personnel. At the same time, the boom truck frequently changes its position in the substation, which is prone to misoperation and touching nearby live equipment, posing a safety risk to the operation of the power grid.

[0004] In summary, in order to solve the problems of low efficiency, poor safety and insufficient portability of existing high-voltage electrical test wiring methods, the present invention proposes an electrical test and wiring device for substation high-voltage equipment based on angle conversion. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention provides an electrical test wiring device for high-voltage equipment in a substation based on angle conversion. The angle of the wiring device is adjustable through a traction structure, and the wiring device is clamped and connected through the pull-out structure of the insulating rod telescopic joint 7 and the insulating rod 15, thereby preventing the wiring of the test wiring device from loosening or falling off due to an inappropriate angle, and preventing the boom truck from having difficulty reaching the test site. The personal safety of the operating personnel is guaranteed to the greatest extent, and it is convenient for on-site maintenance personnel to safely and efficiently conduct electrical test wiring of high-voltage equipment. The present invention is achieved through the following technical solutions: The present invention provides an electrical test wiring device for high-voltage equipment in a substation based on angle conversion, including an angle adjustment structure, a sliding device, a manual operating mechanism, and a front-end wiring clamp; The angle adjustment structure comprises an insulating rod telescopic joint, on which a sliding clamp is arranged; a clamp head fixing clamp is arranged on the upper part of the insulating rod telescopic joint, on which a wiring clamp is arranged, a rotating shaft is arranged on the end of the wiring clamp, a fixed pulley is arranged on the upper end of the sliding groove, and an upper tooth of a wiring device and a lower tooth of a wiring device are respectively arranged in the sliding groove; the upper tooth of the wiring device is arranged above the lower tooth of the wiring device, a voltage test terminal is arranged above the upper tooth of the wiring device, and a current color measurement terminal is arranged below the lower tooth of the wiring device; the rotating shaft passes through the sliding groove and is matched with the fixed pulley; the lower end of the sliding groove is connected to the angle conversion drive shaft, and the angle conversion drive shaft is arranged at one end of the angle conversion drive rod; the other end of the angle conversion drive rod is connected to the sliding clamp; The sliding device comprises a sliding clamp, the sliding clamp is provided with two clamping plates, a sliding wheel is connected between the two clamping plates, the sliding wheel is connected to the slider driving shaft, the slider driving shaft is connected to the slider driven shaft, the slider driven shaft is connected to the angle conversion driving rod; the lower part of the sliding wheel is connected to the operating handle driving rod, the operating handle driving rod drives the sliding wheel to rotate, the sliding wheel rotation drives the driving shaft rotation, the driving shaft rotation drives the driven shaft rotation, thereby driving the angle conversion driving rod to rotate, and adjusting the angle; the insulating rod is arranged in the two clamping plates of the sliding clamp; An operating handle is arranged at the lower end of the operating handle driving rod, and an operating handle limiter is installed around the operating handle on the insulating rod; an insulating rod telescopic joint is connected to the upper part of the insulating rod; The wiring clamp comprises a wiring device lower tooth traction wire, one end of which is connected to the wiring device lower tooth through a fixed pulley, and the other end is connected to the insulation rod expansion joint.

[0006] The beneficial effects of the present invention are: In order to solve the problem of heavy workload of electrical test wiring of high-voltage equipment in substations and the safety risk of high-altitude operations in manual wiring, an electrical test wiring device for high-voltage equipment in substations based on angle conversion was developed. Through a survey of transformer manufacturers, the angle between the transformer bushing and the riser and the vertical direction was obtained, and the angle range of the angle adjustment structure was determined. Based on the pulley structure design, the structural design of the sliding device, the manual operating mechanism and the wiring clamp was completed. The electrical test wiring device for high-voltage equipment in substations based on angle conversion of the present invention was applied on-site to carry out electrical tests for measuring insulation resistance of transformer windings in 110kV substations. The results of on-site test data show that the electrical test wiring device for high-voltage equipment in substations based on angle conversion of the present invention meets the requirements of fast, reliable and safe wiring of on-site voltage tests, improves the efficiency of on-site high-voltage tests, and ensures safe and reliable electrical tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be further described below in conjunction with the accompanying drawings; Figure 1 This is a diagram of the angle adjustment structure of the present invention; Figure 2It is a structural diagram of the sliding device of the present invention; Figure 3 This is a diagram of the manual operation mechanism of the present invention; Figure 4 This is a structural diagram of the fixed pulley for the upper and lower teeth occlusal action of the present invention; Figure 5 It is the overall structure diagram of the present invention; Figure 6 This is the on-site transformer bushing diagram; Figure 7 It is a structural diagram of specific embodiment 2.

[0008] In the figure, 1-, 2-upper teeth of wiring device, 3-fixed pulley, 4-rotating shaft, 5-sliding groove, 6-angle conversion driving rod, 7-insulating rod telescopic joint, 8-clamp head fixing clamp, 9-angle conversion driving shaft, 10-sliding clamp, 11-sliding wheel, 12-slider driven shaft, 13-slider driving shaft, 14-operating handle driving rod, 15-insulating rod, 16-operating handle limiter, 17-operating handle, 18-current test terminal, 19-voltage test terminal, 21-wiring clamp, 22-wiring device lower teeth traction line, 23 rack, 24 gear, 25 driving motor. DETAILED DESCRIPTION

[0009] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0010] The accompanying drawing shows a specific embodiment of the electrical test wiring device for high-voltage equipment in a substation based on angle conversion according to the present invention.

[0011] The electrical test wiring position of high-voltage equipment is located above the bushing of transformer, lightning arrester and mutual inductor. The bushing of high-voltage equipment and transformer is installed at an angle, not perpendicular to the ground, but at an inclination angle. Therefore, the high-altitude wiring device for electrical testing of high-voltage equipment can adjust the angle so that the clamp of the wiring device can be parallel to the wiring bolts on the bushing, which is convenient for wiring.

[0012] The high-voltage equipment casing is about 3-4 meters above the ground. When maintenance personnel are wiring below the high-voltage equipment casing, they need to easily check the wiring conditions at high places. By installing a camera at the front end of the wiring device, on-site maintenance personnel can check the wiring conditions at the high-voltage equipment casing in real time to ensure that the wiring is firm and reliable.

[0013] A wiring clamp is installed at the front end of the aerial wiring device for electrical testing of high-voltage equipment. The opening size of the wiring clamp matches the bolt size at the bushing of the high-voltage equipment, and the opening and closing of the wiring clamp can be controlled by the manual mechanism below.

[0014] The invention discloses a transformer substation high voltage equipment electrical test wiring device structure based on angle conversion, which comprises four parts: an angle adjustment structure, a sliding device, a manual operation mechanism and a front-end wiring clamp.

[0015] The angle adjustment structure of the aerial wiring device is based on an insulating epoxy resin rod.

[0016] The bushings of high-voltage equipment such as lightning arresters and transformers are perpendicular to the ground. However, in order to ensure air insulation between the transformer bushings, the transformer bushing riser is generally installed at an angle to the transformer body, and there is a certain angle between the riser and the body. The transformer bushing is installed vertically on the riser, so the transformer bushing is not 90° perpendicular to the ground, but at an angle. According to a survey of transformer manufacturers, the angle between the transformer bushing and the vertical direction for transformers of different voltage levels is approximately between 10 and 20°. The survey results are shown in Table 1.

[0017] Table 1 Survey results of the angle between the bushing and the vertical direction of transformers of different voltage levels According to the survey results, the electrical test wiring device for high-voltage equipment in substations based on angle conversion is designed with an adjustable angle range of 0~30°. In order to change the angle of the wiring clamp at the front end of the wiring device, a movable short rod, namely the angle driving rod 6, is used for structural design. The sliding clamp drives the angle conversion driving rod to complete the angle conversion of the wiring clamp: the sliding clamp 10 connects the operating handle driving rod 14 with the angle conversion driving rod 6, and the operating handle driving rod 14 is connected to the operating handle 17. The operating handle 17 drives the operating handle driving rod 14 to realize the movement of the angle conversion driving rod 6, and the angle conversion driving rod 6 moves to change the angle between the wiring slot and its fixed bracket.

[0018] The angle adjustment structure based on the movable short rod is as follows Figure 1 As shown, the angle adjustment structure includes a lower tooth of a wiring device, an upper tooth of a wiring device, a fixed pulley, a rotating shaft, a lower tooth sliding groove, an angle conversion drive rod, an insulating rod telescopic joint, a clamp head fixing clamp, an angle conversion drive shaft, a current test terminal, and a voltage test terminal.

[0019] The angle adjustment structure includes an insulating rod telescopic joint 7, on which a sliding clamp is arranged; a clamp head fixing clamp 8 is installed on the upper part of the insulating rod telescopic joint, on which a wiring clamp 21 is installed, and a rotating shaft 4 is installed on the head end of the wiring clamp 21, and a fixed pulley 3 is arranged at the upper end of the sliding groove, and the upper teeth 2 of the wiring device and the lower teeth 1 of the wiring device are respectively installed in the sliding groove; the upper teeth of the wiring device are located above the lower teeth of the wiring device, and a voltage test terminal 19 is installed above the upper teeth 2 of the wiring device, and a current color measurement terminal 18 is installed below the lower teeth 1 of the wiring device; the rotating shaft passes through the sliding groove and is connected with the fixed pulley; the lower end of the sliding groove is connected to the angle conversion drive shaft 9, and the angle conversion drive shaft is installed at one end of the angle conversion drive rod 6, and the other end of the angle conversion drive rod 6 is connected to the sliding clamp.

[0020] The angle-convertible wiring clamp 21 is extended by using a resin insulating rod. The wiring clamp 21 is the insulating rod 15 and its extended portion, the insulating rod telescopic joint 7. The insulating rod 15 is a splicable structure, and its length can be adjusted according to actual wiring.

[0021] The angle adjustment structure is connected to the insulating rod as a whole through a sliding device. The structure of the sliding device is as follows: Figure 2 The sliding device comprises a sliding clamp 10, a sliding wheel 11, a slider driven shaft 12, a slider driving shaft 13, an operating handle driving rod 14, and an insulating rod 15.

[0022] The sliding device includes a sliding clamp 10, which is provided with two clamping plates. A sliding wheel 11 is connected between the two clamping plates of the sliding clamp. The sliding wheel is connected to a slider driving shaft 13, and the slider driving shaft is connected to a slider driven shaft 12. The slider driven shaft 12 is connected to an angle conversion driving rod 6. The lower part of the sliding wheel is connected to an operating handle driving rod 14, and the operating handle driving rod drives the sliding wheel to rotate. The rotation of the sliding wheel drives the driving shaft to rotate. The rotation of the driving shaft drives the driven shaft to rotate, thereby driving the angle conversion driving rod to rotate to adjust the angle. The insulating rod is arranged in the two clamping plates of the sliding clamp.

[0023] An operating handle 17 is arranged at the lower end of the operating handle driving rod 14, and an operating handle limiter 16 is installed around the operating handle on the insulating rod 15; an insulating rod telescopic joint 7 is connected to the upper part of the insulating rod 15; the insulating rod telescopic joint and the insulating rod are a pull-out structure.

[0024] Manual operating mechanism such as Figure 3 As shown, the angle adjustment mechanism is adjusted by pulling the operating handle, and the movable distance of the operating handle can be limited by the limiter, thereby preventing the angle adjustment mechanism from being adjusted incorrectly due to pulling the angle too large or too small. The manual operating mechanism includes an operating handle limiter 16 and an operating handle 17.

[0025] The structure design of the terminal clamp is as follows: Figure 4As shown, there are a wiring device lower tooth 1, a wiring device upper tooth 2, a fixed pulley 3, an insulating rod telescopic joint 7, a clamp head fixing clamp 8, a wiring clamp 21, and a wiring device lower tooth traction wire 22.

[0026] The upper teeth 2 of the wiring device and the lower teeth 1 of the wiring device are engaged to complete the wiring action. There is a fixed pulley 3 in the wiring device. The expansion joint 7 of the insulating rod moves to pull the traction wire 77 of the lower teeth of the wiring device, and changes its movement direction through the fixed pulley 3, pulling the lower teeth 1 of the wiring device to complete the upward movement, and engage with the upper teeth 2 of the wiring device to complete the high-altitude wiring action.

[0027] One end of the traction wire passes through the fixed pulley and is connected to the lower tooth of the wiring device, and the other end is connected to the expansion joint 7 of the insulating rod.

[0028] The overall design of the electrical test wiring device for high-voltage equipment in substations based on angle conversion is as follows: Figure 5 As shown. The electrical test wiring device for high-voltage equipment in a substation based on angle conversion performs cable clamping at high altitude. The resin insulating rod 15 is used to connect the insulating rod telescopic joint to extend the convertible angle wiring clamp 21. The operating handle is used to connect the sliding clamp, and the sliding clamp drives the conversion angle driving rod to complete the angle conversion of the wiring clamp. The upper teeth 2 of the wiring device and the lower teeth 1 of the wiring device are engaged to complete the wiring action. There is a fixed pulley 3 in the wiring device. The insulating rod telescopic joint 7 moves to pull the lower teeth traction wire 22 of the wiring device, and changes its movement direction through the fixed pulley 3. The lower teeth 1 of the wiring device are pulled to complete the upward movement, and are engaged with the upper teeth 2 of the wiring device to complete the high-altitude wiring action.

[0029] The present invention realizes the transfer of traditional aerial work to the ground, avoiding the dangers caused by lifting vehicles and climbing, ensuring operational safety and improving work efficiency. The wiring device can be accurately and firmly installed, and the high-voltage electrical test measurement values ​​are more accurate.

[0030] On July 10, 2024, a field application test was carried out during the high-voltage electrical test of an outdoor transformer in a 110kV substation. Figure 6 shown.

[0031] The insulation resistance of the 110kV transformer winding was measured on site using an insulation resistance tester. Phase A of the three-phase windings A, B, and C was wired using a transformer electrical test high-altitude wiring device, and phases B and C were wired using conventional manual wiring methods. The measurement results were compared. The insulation resistance values ​​of each winding to the ground and between the windings not being tested were measured on site in turn. During the transformer winding insulation resistance measurement process, in order to ensure safety, all windings and the casing except the winding being tested must be grounded.

[0032] The test results of transformer winding insulation resistance are shown in Table 2. The insulation resistance of phase A is measured by using the transformer electrical test high-altitude wiring device. Compared with the last insulation resistance measurement results, the insulation resistance measured by using the transformer electrical test high-altitude wiring device is closer to the last measurement result. The test results show that the transformer electrical test high-altitude wiring device can safely and reliably perform electrical test wiring.

[0033] Table 2 Comparison results of test measurements Through the on-site application of transformer winding insulation resistance measurement electrical tests in 110kV substations, the on-site test data results show that the substation high-voltage equipment electrical test wiring device based on angle conversion of the present invention meets the needs of fast, reliable and safe wiring of on-site voltage tests, improves the efficiency of on-site high-voltage equipment electrical tests, and ensures the safe and reliable conduct of electrical tests.

[0034] Specific embodiment 2 is an alternative structure for adjusting the sliding clamp angle.

[0035] When the operating driving rod is long, the operator cannot operate the angle conversion handle alone due to its heavy weight. A remote control adjustable angle mechanism is designed so that the operator can complete the angle conversion by simply pressing the remote control.

[0036] A rack 23 and a gear are installed on the insulating rod, a driving motor 25 is installed on the sliding clamp, the driving motor is connected to the gear 24, and an angle conversion driving rod and an operating driving rod are respectively installed on the sliding clamps on the upper and lower sides of the gear; the driving motor drives the gear to move on the rack of the insulating rod, thereby driving the angle conversion driving rod on the sliding clamp to move, and the angle adjustment is achieved. After the angle adjustment is completed, the driving motor is self-locked by remote control. At this time, the gear and the rack are relatively stationary, and they are tightly locked together to prevent the gear and the rack from moving relative to each other, thereby achieving the angle locking function. The operating difficulty of the operator is reduced and the work efficiency is improved.

Claims

1. An electrical test wiring device for high-voltage equipment in a substation based on angle conversion, characterized in that: It includes an angle adjustment structure, a sliding device, a manual operating mechanism and a front-end wiring clamp; The angle adjustment structure comprises an insulating rod telescopic joint, on which a sliding clamp is arranged; a clamp head fixing clamp is arranged on the upper part of the insulating rod telescopic joint, on which a wiring clamp is arranged, a rotating shaft is arranged on the end of the wiring clamp, a fixed pulley is arranged on the upper end of the sliding groove, and an upper tooth of a wiring device and a lower tooth of a wiring device are respectively arranged in the sliding groove; the upper tooth of the wiring device is arranged above the lower tooth of the wiring device, a voltage test terminal is arranged above the upper tooth of the wiring device, and a current color measurement terminal is arranged below the lower tooth of the wiring device; the rotating shaft passes through the sliding groove and is matched with the fixed pulley; the lower end of the sliding groove is connected to the angle conversion drive shaft, and the angle conversion drive shaft is arranged at one end of the angle conversion drive rod; the other end of the angle conversion drive rod is connected to the sliding clamp; The sliding device comprises a sliding clamp, the sliding clamp is provided with two clamping plates, a sliding wheel is connected between the two clamping plates, the sliding wheel is connected to the slider driving shaft, the slider driving shaft is connected to the slider driven shaft, the slider driven shaft is connected to the angle conversion driving rod; the lower part of the sliding wheel is connected to the operating handle driving rod, the operating handle driving rod drives the sliding wheel to rotate, the sliding wheel rotation drives the driving shaft rotation, the driving shaft rotation drives the driven shaft rotation, thereby driving the angle conversion driving rod to rotate, and adjusting the angle; the insulating rod is arranged in the two clamping plates of the sliding clamp; An operating handle is arranged at the lower end of the operating handle driving rod, and an operating handle limiter is installed around the operating handle on the insulating rod; an insulating rod telescopic joint is connected to the upper part of the insulating rod, and the insulating rod telescopic joint and the insulating rod are a pull-out structure; The wiring clamp comprises a wiring device lower tooth traction wire, one end of which is connected to the wiring device lower tooth through a fixed pulley, and the other end is connected to the insulation rod expansion joint.

2. The electrical test wiring device for high-voltage equipment in a substation based on angle conversion according to claim 1 is characterized in that: The angle adjustment structure is based on an insulating epoxy resin rod.

3. The electrical test wiring device for high-voltage equipment in a substation based on angle conversion according to claim 1 is characterized in that: The angle adjustment range of the angle adjustment structure is 0-30°.

4. The electrical test wiring device for high-voltage equipment in a substation based on angle conversion according to claim 1 is characterized in that: The movement of the expansion joint of the insulating rod pulls the traction wire of the lower tooth of the wiring device, and changes its movement direction through the fixed pulley, pulling the lower tooth of the wiring device to move upward, and bites together with the upper tooth of the wiring device to complete the high-altitude wiring action.

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