Testing device for direct-current gas-insulated metal-enclosed power transmission line

Abstract

The invention relates to the technical field of high-voltage power transmission lines and insulation, and discloses a direct-current gas insulation metal closed power transmission line testing device which comprises a shell, a transmission pipe is arranged on one side of the upper surface of the shell, a lead end is installed on the upper surface of the transmission pipe, and the outer wall of the transmission pipe is sleeved with a silicone rubber composite insulator high-voltage sleeve. A plurality of air chambers are arranged in the shell, an observation window is arranged on one side of each air chamber, inflation and deflation valves are arranged on the upper surfaces of the air chambers, a support is fixedly connected to the lower surface of the shell, and a supporting plate is fixedly connected to the lower surface of the support. According to the device, vibration pressure is received through the support and the supporting plate, and the connecting block and other components are pushed to operate; the hinge block slides on the connecting frame and stretches the first spring to preliminarily relieve vibration stress, and the connecting frame is extruded to be further weakened. Meanwhile, the supporting plate drives the rack column to be meshed with the gear, the supporting legs transmit stress to the ground, operation of the device is stabilized, and practicability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of high voltage transmission lines and insulation, and in particular to a direct current gas-insulated metal-enclosed transmission line test device. Background Art

[0002] The DC gas-insulated metal-enclosed transmission line (GIL) is a device used to transmit DC power. It consists of a metal casing, a central high-voltage DC conductor, and an insulating gas (usually sulfur hexafluoride or its mixed gas) filling it. It works based on the gas insulation principle. In its production, performance research and operation, the test device plays a vital role. During production, the test device is used for comprehensive quality inspection, including insulation performance, gas sealing, current capacity and other tests to ensure that the product meets the design requirements and quality standards and avoid defective products from being put into use; when new research and development or improvement is carried out, it can simulate different working conditions to study the performance parameters of GIL such as electric field distribution and gas insulation characteristics, and help optimize the design; when a fault occurs or performance deteriorates during operation, it can help diagnose the fault, determine the location and extent of the fault through partial discharge tests, etc., and can also conduct regular safety assessments to discover potential safety hazards and ensure the safe and reliable operation of the transmission line.

[0003] The test equipment generally includes a withstand voltage and partial discharge test equipment under multi-voltage superposition, a basin-type insulator surface charge measurement equipment, an ultra-high voltage AC and DC GIL test equipment, and a DC GIL gas insulation test equipment. The DC GIL gas insulation test equipment is roughly "L"-shaped, including a high-voltage lead terminal, a high-voltage grading ring and a silicone rubber composite insulator high-voltage bushing in the vertical direction; there are coaxially distributed high-voltage guide rod electrodes and a test equipment casing in the horizontal direction.

[0004] In the test environment of the existing DC GIL gas insulation test device, during the test process, the equipment operation and external interference are prone to vibration and impact, which in turn affects the stability of the supporting structure; the internal mechanical vibration of the equipment during operation will be transmitted to the entire device, and external factors such as vibration waves generated by the operation of nearby large equipment, unexpected collisions or strong airflow impacts will also act on the test device; these vibrations and impacts add additional stress to the supporting structure, making its stability face challenges, and may cause deformation, loosening and other conditions, ultimately affecting the normal progress of the test and the accuracy of the results. Therefore, a DC gas-insulated metal-enclosed transmission line test device is proposed to solve the above problems. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides a DC gas-insulated metal-enclosed transmission line test device, which aims to improve the vibration and impact caused by factors such as equipment operation and external interference in the prior art. These vibrations and impacts will cause additional stress to the supporting structure and affect its stability.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a DC gas-insulated metal-enclosed transmission line test device, comprising a shell, a transmission tube is arranged on one side of the upper surface of the shell, a lead terminal is installed on the upper surface of the transmission tube, a silicone rubber composite insulator high-voltage bushing is sleeved on the outer wall of the transmission tube, a plurality of air chambers are arranged inside the shell, observation windows are arranged on one side of the plurality of air chambers, charging and discharging valves are arranged on the upper surfaces of the plurality of air chambers, a bracket is fixedly connected to the lower surface of the shell, a support plate is fixedly connected to the lower surface of the bracket, and a stabilizing component for stabilizing the shell is installed on the lower surface of the support plate;

[0007] The stabilizing assembly includes a connecting block, the upper surface of the connecting block is fixedly connected to the lower surface of the supporting plate, the connecting block is rotatably connected with a rotating plate on both sides, the outer wall of the rotating plate is rotatably connected with a hinge block, a base plate is arranged directly below the supporting plate, a connecting frame is fixedly connected to the upper surface of the base plate, a spring is slidably connected to the outer wall of the connecting frame, one side of the outer wall of the connecting frame is connected to one side of the outer wall of the hinge block via a spring damper, a supporting assembly for increasing the contact area between the base plate and the ground is arranged on the upper surface of the base plate, and left-right symmetrical moving wheels are arranged on the lower surface of the base plate.

[0008] Furthermore, the support assembly includes a support foot, one side of the support foot is rotatably connected to the upper surface of the base plate, one side of the outer wall of the support foot is fixedly connected to a gear, the lower surface of the support plate is fixedly connected to a rack column, and the rack column is meshingly connected to the gear.

[0009] Furthermore, a drying tank is provided on one side of the upper surface of the support plate, an averaging component for evenly distributing the airflow is provided inside the drying tank, an air inlet pipe is fixedly connected to one side of the outer wall of the drying tank, a connecting pipe is fixedly connected to the other side of the outer wall of the drying tank, and a filter component for filtering the gas is installed on the other side of the upper surface of the support plate.

[0010] Furthermore, the equal distribution component includes baffle 1, the outer wall of baffle 1 is fixedly connected to one side of the inner wall of the drying tank, one side of the outer wall of baffle 1 is fixedly connected to a spiral track, and one side of the outer wall of the spiral track is fixedly connected to baffle 2.

[0011] Furthermore, the filter assembly comprises a fixing box, the lower surface of the fixing box is fixedly connected to the other side of the upper surface of the support plate, and the filter box is slidably connected inside the fixing box.

[0012] Furthermore, a transmission pump is fixedly connected to the upper surface of the fixing box, an input end of the transmission pump is connected to a connecting pipe, and an output end of the transmission pump is connected to the upper side of the fixing box.

[0013] Furthermore, an air outlet pipe is fixedly connected to one side of the outer wall of the fixing box, and the air outlet pipe is arranged directly below the filter box.

[0014] Furthermore, the baffle plate 1, the spiral path and the outer wall of the baffle plate 2 are all fixedly connected to the inner wall of the drying tank, the baffle plate 1 and the baffle plate 2 are both penetrated by through holes, and the spiral path is filled with silica gel desiccant.

[0015] Furthermore, both ends of the spring one are fixedly connected to the other side of the outer wall of the hinge block, and the spring one is used to reduce vibration pressure.

[0016] The present invention has the following beneficial effects:

[0017] 1. In the present invention, the vibration pressure is received by the bracket and the support plate, and then the connecting block is pushed so that the rotating plate drives the hinge block to rotate, and then the hinge block slides on the outer wall of the connecting frame while stretching the spring to achieve the effect of initial mitigation of the vibration stress, and then the connecting frame is squeezed by the hinge block, so as to achieve the effect of further reducing the vibration stress, and at the same time, the rack column is driven by the support plate to penetrate the bottom plate and rotate in meshing with the gear, and then the support foot is driven to further transmit the vibration stress to the ground, thereby achieving the effect of stabilizing the operation of the support device and improving the practicality of the device.

[0018] 2. In the present invention, the SF6 gas pipeline is connected to the air inlet pipe, and the SF6 gas is transmitted to the inside of the spiral channel by a transmission pump. The SF6 gas rotates inside the spiral channel and fully contacts with the silica gel desiccant, thereby achieving the effect of fully drying the SF6 gas. At the same time, the SF6 gas is transmitted to the filter box through the connecting pipe, and then the SF6 gas is further filtered, thereby improving the purity of the SF6 gas and further improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a DC gas-insulated metal-enclosed transmission line test device proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the drying tank part of the DC gas-insulated metal-enclosed transmission line test device proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the rotating plate portion of the DC gas-insulated metal-enclosed transmission line test device proposed by the present invention;

[0022] Figure 4 This is a schematic structural diagram of the connection block portion of the DC gas-insulated metal-enclosed transmission line test device proposed by the present invention;

[0023] Figure 5 This is a schematic structural diagram of the filter box portion of the DC gas-insulated metal-enclosed transmission line test device proposed by the present invention.

[0024] Legend:

[0025] 1. Shell; 2. Transmission pipe; 3. Lead terminal; 4. Silicone rubber composite insulator high-voltage bushing; 5. Air chamber; 6. Observation window; 7. Charge and discharge valve; 8. Bracket; 9. Support plate; 10. Connection block; 11. Rotating plate; 12. Articulated block; 13. Connecting frame; 14. Spring 1; 15. Spring damper; 16. Bottom plate; 17. Moving wheel; 18. Support foot; 19. Gear; 20. Rack column; 21. Drying tank; 22. Inlet pipe; 23. Baffle 1; 24. Spiral road; 25. Baffle 2; 26. Connecting pipe; 27. Filter box; 28. Transmission pump; 29. ​​Filter box; 30. Exhaust pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Reference Figure 1 - Figure 5An embodiment of the present invention is as follows: a DC gas-insulated metal-enclosed transmission line test device, comprising a shell 1, which serves as the main shell of the entire device and plays a role in protecting the internal components and the overall structure of the components. A transmission tube 2 is arranged on one side of the upper surface of the shell 1. The transmission tube 2 is used to transmit relevant electrical signals or other substances. A lead terminal 3 is installed on the upper surface of the transmission tube 2. The lead terminal 3 is mainly responsible for connecting to external lines to realize the input or output of electricity. The outer wall of the transmission tube 2 is sheathed with a silicone rubber composite insulator high-voltage bushing 4. The silicone rubber composite insulator high-voltage bushing 4 plays a role in insulating and protecting the transmission tube 2 to prevent high-voltage electricity leakage. A plurality of Gas chamber 5, gas chamber 5 is used to store and process related insulating gas, etc., multiple gas chambers 5 are provided with observation windows 6 on one side, and observation windows 6 are convenient for operators to observe the internal conditions of gas chamber 5, such as gas state, component operation, etc., multiple gas chambers 5 are provided with charging and discharging valves 7 on the upper surface, and charging and discharging valves 7 are used to control the filling and discharging of gas to meet the requirements of gas pressure and composition during the test process, a bracket 8 is fixedly connected to the lower surface of shell 1, and bracket 8 plays the role of supporting and connecting shell 1 and support plate 9, so that the structure of the whole device is more stable, and a support plate 9 is fixedly connected to the lower surface of bracket 8, and support plate 9 provides a mounting plane for other components, and the lower surface of support plate 9 is installed with useful A stabilizing assembly for stabilizing the housing 1; the stabilizing assembly includes a connecting block 10, the upper surface of the connecting block 10 is fixedly connected to the lower surface of the support plate 9, the connecting block 10 serves to connect the rotating plate 11 and the support plate 9, the connecting block 10 is rotatably connected to the rotating plates 11 on both sides, the rotating plates 11 can achieve a certain angle of rotation to adapt to forces in different directions, the outer wall of the rotating plate 11 is rotatably connected to the hinge block 12, the hinge block 12 is used to connect the rotating plate 11 and the connecting frame 13, a bottom plate 16 is arranged directly below the support plate 9, the bottom plate 16 serves as a bottom supporting component, and bears the weight of the entire device, the upper surface of the bottom plate 16 is fixedly connected to the connecting frame 13, and the connecting frame 13 is a spring-14 The spring damper 15 provides an installation position, the outer wall of the connecting frame 13 is slidably connected with a spring 14, and when the device is vibrated, the spring 14 absorbs and buffers part of the vibration energy through its own elastic deformation to play a shock-absorbing role. One side of the outer wall of the connecting frame 13 is connected to one side of the outer wall of the hinge block 12 through the spring damper 15. The spring damper 15 further consumes the vibration energy during the shock absorption process, reduces the impact of the vibration on the device, and improves the stability of the device. The upper surface of the bottom plate 16 is provided with a support component that increases the contact area between the bottom plate 16 and the ground, and the lower surface of the bottom plate 16 is provided with left-right symmetrical moving wheels 17, which facilitate the movement and transportation of the device;The support assembly includes a support foot 18, one side of the support foot 18 is rotatably connected to the upper surface of the bottom plate 16. When the device is working, the support foot 18 can increase the contact area with the ground by rotating to improve stability. A gear 19 is fixedly connected to one side of the outer wall of the support foot 18, and a rack column 20 is fixedly connected to the lower surface of the support plate 9. The rack column 20 is meshed with the gear 19. When the device is placed or moved, the relative position change of the rack column 20 will drive the gear 19 to rotate, thereby rotating the support foot 18 to adjust the support area, further enhancing the stability of the device;

[0028] Reference Figure 1 - Figure 5A drying tank 21 is provided on one side of the upper surface of the support plate 9. The drying tank 21 is used to dry the gas and remove impurities such as moisture in the gas to meet the requirements of the test device for gas dryness. An averaging component is provided inside the drying tank 21 to evenly distribute the airflow. An air inlet pipe 22 is fixedly connected to one side of the outer wall of the drying tank 21. The air inlet pipe 22 is a channel for the gas to enter the drying tank 21. A connecting pipe 26 is fixedly connected to the other side of the outer wall of the drying tank 21. The connecting pipe 26 is used to transport the dried gas to subsequent processing links. The averaging component includes a baffle 23. The outer wall of the baffle 23 is fixedly connected to one side of the inner wall of the drying tank 21. The baffle 2 3 plays a role in changing the flow direction of the gas so that the gas can flow along the designed path. A spiral channel 24 is fixedly connected to one side of the outer wall of the baffle 1 23, and a baffle 25 is fixedly connected to one side of the outer wall of the spiral channel 24. The spiral channel 24 is filled with silica gel desiccant, which can absorb moisture in the gas to achieve a drying function. At the same time, the structure of the spiral channel 24 can make the gas contact with the desiccant more evenly during the flow process, thereby improving the drying effect. The baffle 25 plays a role in further guiding the flow direction of the gas. A filter assembly for filtering the gas is installed on the other side of the upper surface of the support plate 9; the filter assembly includes a fixed box 27, and the lower surface of the fixed box 27 is fixed Connected to the other side of the upper surface of the support plate 9, the fixed box 27 provides an installation space for the filter box 29. The filter box 29 is slidably connected inside the fixed box 27. The filter box 29 is used to further filter the gas and remove other impurities in the gas, such as tiny particles. A transmission pump 28 is fixedly connected to the upper surface of the fixed box 27. The input end of the transmission pump 28 is connected to the connecting pipe 26, and the output end of the transmission pump 28 is connected to the upper side of the fixed box 27. The function of the transmission pump 28 is to provide power to transport the dried gas from the drying tank 21 to the fixed box 27 through the connecting pipe 26. An outlet pipe 30 is fixedly connected to one side of the outer wall of the fixed box 27. The outlet pipe 30 It is arranged just below the filter box 29, and the air outlet pipe 30 is the output channel of the filtered gas. The outer walls of the baffle 1 23, the spiral channel 24 and the baffle 2 25 are fixedly connected to the inner wall of the drying tank 21 to ensure its stability in the drying tank 21. Through holes are opened inside the baffle 1 23 and the baffle 2 25 to facilitate the passage of gas. Both ends of the spring 14 are fixedly connected to the other side of the outer wall of the hinge block 12. The spring 14 is used to reduce vibration pressure. When the device is vibrated, the spring 14 absorbs and buffers part of the vibration energy through its own elastic deformation, thereby reducing the impact of the vibration on other parts of the device and ensuring the stability and normal operation of the device.

[0029] Working principle: When the test device is needed, in the overall structure and operation, the shell 1 is used as the main bearing component, and the transmission tube 2 on one side of its upper surface is used to transmit relevant signals or substances, etc. The lead terminal 3 on the upper surface of the transmission tube 2 and the silicone rubber composite insulator high-voltage bushing 4 set on the outer wall work together to achieve specific power transmission or related functions. The multiple air chambers 5 inside the shell 1 are used to accommodate and process relevant gases. The observation window 6 on one side of the air chamber 5 is convenient for observing the internal situation. The charging and discharging valve 7 on the upper surface of the air chamber 5 can control the charging and discharging of the gas. The lower surface of the shell 1 is connected to the support plate 9 through the bracket 8, and the stabilizing component on the lower surface of the support plate 9 plays an important role. When the support plate 9 receives vibration pressure, the rotating plate 11 and the hinge block 12 on both sides of the connecting block 10 rotate at this time, thereby achieving the effect of pushing the hinge block 12 to stretch the spring 14 on the outer wall of the connecting frame 13. At this time, the elastic deformation of the spring 14 and the spring damper 15 work together to achieve the effect of reducing the vibration pressure. At the same time, the support plate 9 will push the rack column 20 to mesh with the gear 19 and rotate, thereby achieving the effect of driving the support foot 18 to rotate. The support foot 18 contacts the ground, thereby increasing the contact area between the bottom plate 16 and the ground, and further improving the stability of the device. At the same time, the mobile wheel 17 on the lower surface of the bottom plate 16 can facilitate the mobile test of the device.

[0030] Secondly, when it is necessary to inflate the interior of multiple air chambers 5, the SF6 gas enters the drying tank 21 from the air inlet pipe 22. In the drying tank 21, the airflow first encounters the through hole inside the baffle 1 23, and then flows along the spiral path 24. The silica gel desiccant filled in the spiral path 24 dries the gas. At the same time, the structure of the spiral path 24 makes the airflow distribution more uniform. The dried gas flows out through the through hole inside the baffle 25. After that, the dried gas enters the transmission pump 28 through the connecting pipe 26. At the same time, the transmission pump 28 is started to transport the gas to the filter box 29 in the fixed box 27 for filtering. The filtered gas is discharged from the outlet pipe 30, thereby completing the drying and filtering process of the gas, providing a gas environment that meets the requirements for the test device, and ensuring the smooth progress of the test.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC gas-insulated metal-enclosed transmission line test device, comprising a housing (1), characterized in that: A transmission tube (2) is arranged on one side of the upper surface of the shell (1), a lead terminal (3) is installed on the upper surface of the transmission tube (2), a silicone rubber composite insulator high-voltage bushing (4) is sleeved on the outer wall of the transmission tube (2), a plurality of air chambers (5) are arranged inside the shell (1), observation windows (6) are arranged on one side of the plurality of air chambers (5), charging and discharging valves (7) are arranged on the upper surfaces of the plurality of air chambers (5), a bracket (8) is fixedly connected to the lower surface of the shell (1), a support plate (9) is fixedly connected to the lower surface of the bracket (8), and a stabilizing component for stabilizing the shell (1) is installed on the lower surface of the support plate (9); The stabilizing component comprises a connecting block (10), the upper surface of the connecting block (10) is fixedly connected to the lower surface of the supporting plate (9), the two sides of the connecting block (10) are rotatably connected to rotating plates (11), the outer wall of the rotating plate (11) is rotatably connected to a hinge block (12), a bottom plate (16) is arranged directly below the supporting plate (9), the upper surface of the bottom plate (16) is fixedly connected to a connecting frame (13), the outer wall of the connecting frame (13) is slidably connected to a spring 1 (14), one side of the outer wall of the connecting frame (13) is connected to one side of the outer wall of the hinge block (12) via a spring damper (15), the upper surface of the bottom plate (16) is provided with a supporting component for increasing the contact area between the bottom plate (16) and the ground, and the lower surface of the bottom plate (16) is provided with left-right symmetrical moving wheels (17).

2. The DC gas-insulated metal-enclosed transmission line test device according to claim 1, characterized in that: The support assembly comprises a support foot (18), one side of the support foot (18) is rotatably connected to the upper surface of the base plate (16), one side of the outer wall of the support foot (18) is fixedly connected to a gear (19), and the lower surface of the support plate (9) is fixedly connected to a rack column (20), and the rack column (20) is meshingly connected to the gear (19).

3. The DC gas-insulated metal-enclosed transmission line test device according to claim 2, characterized in that: A drying tank (21) is arranged on one side of the upper surface of the support plate (9), and an equalizing component for evenly distributing the airflow is arranged inside the drying tank (21); an air inlet pipe (22) is fixedly connected to one side of the outer wall of the drying tank (21), and a connecting pipe (26) is fixedly connected to the other side of the outer wall of the drying tank (21); and a filter component for filtering gas is installed on the other side of the upper surface of the support plate (9).

4. The DC gas-insulated metal-enclosed transmission line test device according to claim 3 is characterized in that: The equal distribution component comprises a baffle plate 1 (23), the outer wall of the baffle plate 1 (23) is fixedly connected to one side of the inner wall of the drying tank (21), the outer wall of the baffle plate 1 (23) is fixedly connected to a spiral track (24), and the outer wall of the spiral track (24) is fixedly connected to a baffle plate 2 (25).

5. The DC gas-insulated metal-enclosed transmission line test device according to claim 4, characterized in that: The filter assembly comprises a fixed box (27), the lower surface of the fixed box (27) is fixedly connected to the other side of the upper surface of the support plate (9), and the interior of the fixed box (27) is slidably connected with a filter box (29).

6. The DC gas-insulated metal-enclosed transmission line test device according to claim 5, characterized in that: A transmission pump (28) is fixedly connected to the upper surface of the fixed box (27); an input end of the transmission pump (28) is connected to the connecting pipe (26); and an output end of the transmission pump (28) is connected to the upper side of the fixed box (27).

7. The DC gas-insulated metal-enclosed transmission line test device according to claim 6, characterized in that: An air outlet pipe (30) is fixedly connected to one side of the outer wall of the fixing box (27), and the air outlet pipe (30) is arranged directly below the filter box (29).

8. The DC gas-insulated metal-enclosed transmission line test device according to claim 7, characterized in that: The outer walls of the baffle plate 1 (23), the spiral path (24) and the baffle plate 2 (25) are all fixedly connected to the inner wall of the drying tank (21); through holes are formed inside the baffle plate 1 (23) and the baffle plate 2 (25); and the spiral path (24) is filled with silica gel desiccant.

9. The DC gas-insulated metal-enclosed transmission line test device according to claim 1, characterized in that: Both ends of the spring 1 (14) are fixedly connected to the other side of the outer wall of the hinge block (12), and the spring 1 (14) is used to reduce vibration pressure.

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