Extra-high voltage bushing special hot spot temperature rise test device and installation method
By setting a thermocouple on the outer wall and inside of the transformer casing, combined with a sealed adapter plate and a temperature patrol instrument, the problem that existing devices cannot measure the internal temperature of the casing is solved, and accurate temperature rise detection of the ultra-high voltage casing is achieved to ensure product quality and stable operation.
Patent Information
- Application Number
- CN202311831822.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-07-01
AI Technical Summary
The existing transformer casing temperature rise test device cannot accurately measure the temperature distribution of the casing, resulting in the possible problems of insulation deterioration and breakdown in extreme environments. Especially for UHV casing products, the existing devices cannot meet their stable operation needs in UHV transmission projects.
A special hot spot temperature rise test device for ultra-high voltage casing is designed, including casing, fuel tank, sealed bracket, adjustment support frame, triangular bracket and support base frame. By setting a thermocouple on the outer wall and inside of the casing, combined with a sealed adapter plate and a temperature patrol instrument, a comprehensive detection of the inside and outside temperature of the casing is achieved.
Able to accurately measure the internal and external temperature of the casing, ensure product quality, and provide guidance for subsequent product research and development to reduce operating risks caused by temperature rise.
Smart Images
Figure CN120232936A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of transformer bushing detection, and specifically to a special hot spot temperature rise test device and installation method for ultra-high voltage bushings. Background Art
[0002] According to the requirements of the national standard GB / T4109: One transformer bushing of the same model and batch needs to be selected for the temperature rise test to verify the overall thermal load capacity of the bushing under extreme environmental conditions. However, the current test device is only used to measure the temperature rise of each part on the outer surface of the bushing, and it can only be applied to the bushing products in the traditional field. The temperature distribution inside the bushing cannot be clearly and accurately grasped. During the operation of the transformer, under the combined action of superimposed current heating, dielectric heating, transformer oil temperature, ambient temperature, etc., the temperature inside the bushing may be too high, resulting in insulation deterioration or even breakdown. Given the great significance of ultra-high voltage bushing products for the stable operation of ultra-high voltage transmission projects, in order to reduce the operation risk problems caused by the temperature rise of ultra-high voltage bushings, more accurate temperature measurement of the inside of ultra-high voltage bushings is required to evaluate whether the current-carrying structure of the bushing is reasonable and reliable. Summary of the Invention
[0003] The purpose of the present invention is to provide a special hot spot temperature rise test device and installation method for ultra-high voltage bushings, which detect the temperature inside and outside the bushing to determine whether the temperature rise test of the product is qualified, and can more truly reflect the performance parameters of the bushing body. While ensuring the product quality, it also has guiding significance for the subsequent product research and development.
[0004] The purpose of the present invention is achieved by the following technical solutions:
[0005] A special hot spot temperature rise test device for UHV bushings, comprising a bushing, an oil tank, a sealed bracket, an adjusting support frame, a triangular support and a support base frame. The support base frame is adjustably disposed in the triangular support, the oil tank is disposed on the support base frame, the bushing is disposed in the sealed bracket, and the lower end of the bushing is inserted into the oil tank. The lower end of the sealed bracket is mounted on the oil tank, the front end of the sealed bracket is supported by the adjusting support frame, a heating plate is disposed on the lower side of the sealed bracket, a bracket thermocouple is disposed on the inner wall of the upper side of the sealed bracket, a first thermocouple is disposed on the outer wall of the bushing, a rolled tube and a conductive tube are disposed inside the bushing, and a second thermocouple is disposed between the rolled tube and the conductive tube. A sealing adapter plate is disposed at the upper end of the bushing, and the first thermocouple on the side of the bushing away from the oil tank and the second thermocouple inside the bushing are respectively connected to the sealing adapter plate through corresponding thermocouple signal lines. The outside of the sealing adapter plate is connected to a temperature inspection instrument disposed outside the sealed bracket through a first cable. The first thermocouple on the side of the bushing close to the oil tank is correspondingly connected to a second cable at the lower end of the bushing through a corresponding thermocouple signal line, and each second cable is fixed on a riser cylinder on the upper side of the oil tank after being led out of the oil tank, and the second cable is connected to the temperature inspection instrument.
[0006] A plurality of isolation bent plates are disposed along the circumferential direction between the conductive tube and the rolled tube, and a wiring channel is formed between adjacent isolation bent plates, and the second thermocouple signal line connected to the second thermocouple is disposed in the corresponding wiring channel.
[0007] A plurality of metal terminals are disposed on the outside of the sealing adapter plate, and each metal terminal is respectively connected to a corresponding first cable. A connecting tube and an insulating wire are disposed on the inside of the sealing adapter plate, and the insulating wire is disposed in the connecting tube. One end of the insulating wire is connected to the end of the corresponding metal terminal, and the other end is connected to the corresponding second thermocouple signal line inside the bushing. The second thermocouple signal line is connected to the corresponding second thermocouple inside the bushing. One end of the connecting tube is hermetically connected to the sealing adapter plate, and the other end is hermetically connected to the top plate of the bushing.
[0008] A connecting socket is disposed on the inside of the sealing adapter plate, and the other end of the first thermocouple signal line corresponding to the first thermocouple on the side of the bushing away from the oil tank is connected to the corresponding connecting socket. The connecting socket is connected to the corresponding metal terminal, and the other end of the first thermocouple signal line corresponding to the first thermocouple on the side of the bushing close to the oil tank is connected to the second cable through a plug-in terminal.
[0009] Both ends of the connecting pipe are provided with connecting flanges. One of the connecting flanges is fixedly connected to the sealing adapter plate through fastening bolts, and the other connecting flange is fixedly connected to the top plate of the casing through fastening bolts. Sealing elements are provided between the sealing adapter plate and the corresponding connecting flange, and between the top plate of the casing and the corresponding connecting flange.
[0010] The triangular bracket is provided with an angle adjustment fixing plate and a rotating support shaft. Multiple groups of angle adjustment screw holes are provided on the angle adjustment fixing plate. The front end of the support chassis is supported by the rotating support shaft, and the middle part of the support chassis is fixed to any group of angle adjustment screw holes on the angle adjustment fixing plate by bolts and locked.
[0011] The second cable is fixed to the lifting cylinder through a clip. The clip includes a clip groove plate and a first fixed clip and a second fixed clip respectively arranged on both sides of the clip groove plate. Clip grooves for accommodating and fixing the second cable are provided on both sides of the clip groove plate.
[0012] The adjustment support frame includes a support top frame and a bottom frame. The bottom frame is placed on the ground. Hollow rods are provided on both sides of the bottom frame, and multiple first adjustment holes are provided on the hollow rods. Top frame side rods are provided on both sides of the support top frame, and multiple second adjustment holes are provided on the top frame side rods. The lower ends of the top frame side rods are inserted into the corresponding hollow rods on both sides and fixedly connected to the hollow rods by passing fastening bolts through the corresponding first adjustment holes and second adjustment holes and then threadedly connecting with nuts.
[0013] One general interface of the bracket is provided on the sealed bracket. Each bracket thermocouple in the sealed bracket is respectively connected to the general interface of the bracket through a corresponding third thermocouple signal line. The general interface of the bracket is connected to the temperature inspection instrument through a third cable.
[0014] An installation method of the special high-voltage bushing special hot spot temperature rise test device according to the above, includes the following steps:
[0015] Step 1: Place the support chassis in the triangular bracket and adjust the inclination angle of the support chassis. After the position of the support chassis is determined, the front end of the support chassis is supported by the rotating support shaft, and the middle part of the support chassis is fixed to a corresponding group of angle adjustment screw holes on the angle adjustment fixing plate by bolts;
[0016] Step 2: Install the oil tank on the support chassis;
[0017] Step 3: Install the lower end of the bushing in the oil tank, and the second cable at the lower end of the bushing is led out from the inside of the oil tank and fixed on the lifting cylinder on the upper side of the oil tank. The first thermocouple on the side of the bushing away from the oil tank is connected to the sealing adapter plate through a corresponding first thermocouple signal line;
[0018] Step 4: Connect each bracket thermocouple inside the sealed bracket to the bracket total interface provided on the sealed bracket through the corresponding third thermocouple signal wire respectively;
[0019] Step 5: Sleeve the sealed bracket on the said sleeve, and fix the lower end of the sealed bracket on the said fuel tank;
[0020] Step 6: Place the adjustment support frame under the lower end of the upper end of the sealed bracket, and adjust the height of the support top frame at the upper end of the adjustment support frame according to the inclination of the sealed bracket to support the upper end of the sealed bracket;
[0021] Step 7: Connect the said sealing adapter plate to the temperature inspection instrument provided outside the sealed bracket through the first cable, connect the second cable to the temperature inspection instrument, and connect the bracket total interface on the sealed bracket to the temperature inspection instrument through the third cable.
[0022] The advantages and positive effects of the present invention are as follows:
[0023] 1. When the present invention works, the sleeve is placed in the sealed bracket, and the heating plate on the lower side of the sealed bracket heats the inside of the sealed bracket to meet the environmental temperature requirements for the sleeve temperature rise test. During the test, the first thermocouple on the outer wall of the sleeve and the second thermocouple inside the sleeve detect the temperature inside and outside the sleeve to obtain complete, detailed and accurate data on the temperature rise of each part of the product, and judge whether the product temperature rise test is qualified based on this. Therefore, the present invention can more truly reflect the performance parameters of the sleeve body, and has guiding significance for the subsequent product research and development while ensuring the product quality.
[0024] 2. The first thermocouple on the side of the sleeve away from the fuel tank and the second thermocouple inside the sleeve are respectively connected to the sealing adapter plate provided at the upper end of the sleeve through the corresponding thermocouple signal wires. In this way, when the sealed bracket is sleeved on the said sleeve, it will not be affected by each thermocouple signal wire, which is convenient for installation. At the same time, the connecting pipe inside the sealing adapter plate can ensure the internal seal of the sleeve, thereby ensuring that the insulating medium inside the sleeve will not leak. And the first thermocouple on the side of the sleeve close to the fuel tank is respectively connected to the second cable led out from the lower end of the sleeve through the corresponding thermocouple signal wire, and the second cable is uniformly fixed on the elevation cylinder on the upper side of the fuel tank after being led out from the fuel tank to avoid accumulation.
[0025] 3. The present invention can adjust the inclination angle of the support chassis according to different casing specifications, user requirements, etc., so as to ensure that the inclination angles of the fuel tank, the casing, and the closed bracket meet the requirements after installation. At the same time, the overall center of gravity is within the support range of the triangular bracket. In addition, a total bracket interface is provided on the closed bracket, and each bracket thermocouple inside the closed bracket is connected to the total bracket interface through a third thermocouple signal line. In this way, the closed bracket can be directly sleeved on the casing. After the assembly is completed, the sealed adapter plate is connected to the temperature inspection instrument through the first cable, and the second cable is connected to the temperature inspection instrument, so as to achieve the purpose of temperature detection of the inside and outside of the casing by each first thermocouple and second thermocouple. The total bracket interface is connected to the temperature inspection instrument through a third cable, so as to achieve the purpose of real-time monitoring of the temperature inside the closed bracket, thereby further facilitating the installation and use of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic structural diagram of the present invention
[0027] Figure 2 is Figure 1 a schematic diagram of the distribution points of the first thermocouples on the surface of the casing in
[0028] Figure 3 is Figure 2 an enlarged view of part A in
[0029] Figure 4 is Figure 3 a schematic cross-sectional view of the conductive tube and the rolled tube in
[0030] Figure 5 is Figure 1 a schematic connection diagram of the sealed adapter plate in
[0031] Figure 6 is Figure 1 a schematic structural diagram of the adjusting support frame in
[0032] Figure 7 is Figure 1 a schematic structural diagram of the clamp in
[0033] Among them, 1 is a casing, 101 is a conductive pipe, 102 is an isolation bending plate, 103 is a rolled pipe, 104 is a first thermocouple, 105 is a second thermocouple, 106 is a wire routing channel, 1071 is a first thermocouple signal wire, 1072 is a second thermocouple signal wire, 1073 is a plug-in terminal, 2 is a sealing adapter plate, 201 is a metal terminal, 202 is a connecting pipe, 203 is a fastening bolt, 204 is an insulated wire, 205 is a connecting flange, 206 is a connecting socket, 3 is a first cable, 4 is an adjusting support frame, 401 is a supporting top frame, 402 is a hollow rod, 403 is a bottom frame, 5 is a temperature patrol instrument, 6 is a heating plate, 7 is a sealed bracket, 701 is a bracket thermocouple, 702 is a bracket total interface, 8 is a triangular bracket, 801 is an angle adjusting fixed plate, 8011 is an angle adjusting screw hole, 802 is a rotating support shaft, 9 is an oil tank, 10 is a riser tube, 11 is a clamping piece, 1101 is a first fixed clamping plate, 1102 is a clamping groove plate, 1103 is a fixed clamping groove, 1104 is a second fixed clamping plate, 12 is a second cable, 13 is a supporting bottom frame. Detailed implementation mode
[0034] The present invention will be further described in detail below with reference to the accompanying drawings.
[0035] As Figures 1 to 7 shown, the present invention includes a casing 1, an oil tank 9, a sealed bracket 7, an adjusting support frame 4, a triangular bracket 8 and a supporting bottom frame 13, wherein the supporting bottom frame 13 is adjustably arranged in the triangular bracket 8, the oil tank 9 is arranged on the supporting bottom frame 13, the casing 1 is arranged in the sealed bracket 7, and the lower end of the casing 1 is inserted into the oil tank 9, the lower end of the sealed bracket 7 is installed on the oil tank 9, the front end of the sealed bracket 7 is supported by the adjusting support frame 4, a heating plate 6 is arranged on the lower side of the sealed bracket 7, a bracket thermocouple 701 is arranged on the inner wall of the upper side of the sealed bracket 7, a first thermocouple 104 is arranged on the outer wall of the casing 1, a rolled pipe 103 and a conductive pipe 101 are arranged inside the casing 1, and a second thermocouple 105 is arranged between the rolled pipe 103 and the conductive pipe 101, a sealing adapter plate 2 is arranged at the upper end of the casing 1, and the first thermocouple 104 on the side of the casing 1 away from the oil tank 9 and the second thermocouple 105 inside the casing 1 are respectively connected to the sealing adapter plate 2 through corresponding thermocouple signal wires, the outside of the sealing adapter plate 2 is connected to a temperature patrol instrument 5 arranged outside the sealed bracket 7 through a first cable 3, the first thermocouple 104 on the side of the casing 1 close to the oil tank 9 is correspondingly connected to the second cable 12 at the lower end of the casing 1 through a corresponding thermocouple signal wire, and each second cable 12 is led out from the oil tank 9 and uniformly fixed on a riser tube 10 on the upper side of the oil tank 9, the second cable 12 is connected to the temperature patrol instrument 5, and in addition, other cables such as power cables are led out from the oil tank 9 and fixed on the riser tube 10 together with the second cable 12.
[0036] In this embodiment, the closed bracket 7 is hermetically wrapped 360 degrees with polyurethane heat-insulating cotton to form a closed space inside for heating and heat preservation. The heating plate 6 is powered on to heat the internal space of the closed bracket 7 for the temperature rise test of the casing 1. The heating plate 6 can select a suitable heating structure according to actual needs. In this embodiment, a heating resistance wire is provided inside the heating plate 6, and the heating is realized after the heating resistance wire is powered on. This is a well-known technology in the art. The bracket thermocouple 701 monitors the temperature inside the closed bracket 7 in real time to meet the requirements of the ambient temperature for the casing temperature rise test. The first thermocouple 104 and the second thermocouple 105 detect the temperature inside and outside the casing 1 to obtain complete, detailed and accurate data on the temperature rise of each part of the product, and judge whether the product temperature rise test is qualified based on this.
[0037] As Figures 3 to 4 shown, in this embodiment, a plurality of isolation bent plates 102 are provided along the circumferential direction between the conductive tube 101 and the rolled tube 103, and a wiring channel 106 is formed between adjacent isolation bent plates 102. The second thermocouple signal wires 1072 connected to the second thermocouple 105 are respectively led out along the corresponding wiring channels 106. In this embodiment, both the second thermocouple 105 and the second thermocouple signal wires 1072 are adhesively fixed to the conductive tube 101. Additionally, as Figure 3 shown, the first thermocouple signal wire 1071 connected to the first thermocouple 104 is adhesively fixed to the outer wall of the casing 1.
[0038] As Figure 2 shown, the first thermocouple 104 and the second thermocouple 105 can be set at appropriate positions on the casing 1 according to needs. Since the conductive tube 101 is usually welded in several sections due to its length, the second thermocouple 105 needs to be placed at each welding position for detection. In order to avoid incomplete data caused by accidents of the thermocouple, two thermocouples need to be symmetrically arranged inside and outside each position for measurement.
[0039] As Figure 5 shown, in this embodiment, the sealing adapter plate 2 is made of epoxy resin material, and a plurality of metal terminals 201 are provided on the outer side of the sealing adapter plate 2 and are respectively connected to the corresponding first cables 3. A connecting tube 202 and an insulating wire 204 are provided inside the sealing adapter plate 2, and the insulating wire 204 is arranged in the connecting tube 202. One end of the insulating wire 204 is connected to the end of the corresponding metal terminal 201, and the other end is connected to the corresponding second thermocouple signal wire 1072 inside the casing 1. Since the inside of the casing 1 is filled with an insulating medium, one end of the connecting tube 202 is hermetically connected to the sealing adapter plate 2, and the other end is hermetically connected to the top plate of the casing 1, so as to ensure the internal seal of the casing 1. Additionally, as Figure 5As shown in the figure, in this embodiment, in order to reduce environmental interference and other possible circuit interferences and ensure measurement accuracy, a thermocouple with three signal lines needs to be selected. The second thermocouple signal line 1072 is correspondingly connected to the insulated wire 204 through a pair of plug-in terminals 1073. And to ensure that the temperature signals at different positions can be accurately identified, it is necessary to mark the connection between the plug-in terminals 1073 and the corresponding thermocouple to ensure that the corresponding positions of all the thermocouple signal lines inside the corresponding sleeve 1 can be identified. Also, the insulated wire 204 and the first cable 3 need to be marked to be accurately distinguishable. The plug-in terminals 1073 are well-known techniques in the art and are commercially available products.
[0040] As Figure 5 shown, inside the sealing adapter plate 2, there is a connection socket 206. And the first thermocouple signal line 1071 corresponding to the first thermocouple 104 on the side of the sleeve 1 away from the fuel tank 9 is connected to the connection socket 206. The connection socket 206 is connected to the corresponding metal terminal 201. In this way, when installing, each first thermocouple 104 and the second thermocouple 105 on the side of the sleeve 1 away from the fuel tank 9 can be uniformly connected to the sealing adapter plate 2 through the corresponding thermocouple signal lines. The sealing bracket 7 can be directly sleeved on the sleeve 1 without being affected by cables such as thermocouple signal lines. After the sealing bracket 7 is installed, each metal terminal 201 on the sealing adapter plate 2 is respectively connected to the temperature inspection instrument 5 through the corresponding first cable 3. Additionally, the first thermocouple signal line 1071 corresponding to the first thermocouple 104 on the side of the sleeve 1 close to the fuel tank 9 is connected to the second cable 12 through the plug-in terminal 1073.
[0041] As Figure 5 shown, in this embodiment, both ends of the connecting pipe 202 are provided with connecting flanges 205. And one end of the connecting flange 205 is fixedly connected to the sealing adapter plate 2 through a fastening bolt 203, and the other end of the connecting flange 205 is fixedly connected to the top plate of the sleeve 1 through a fastening bolt 203. A sealing ring or other sealing elements are provided between the sealing adapter plate 2 and the corresponding connecting flange 205 and between the top plate of the sleeve 1 and the corresponding connecting flange 205 to ensure the sealing effect.
[0042] As Figure 1As shown in the figure, in this embodiment, an angle adjustment fixing plate 801 and a rotating support shaft 802 are provided inside the triangular support 8. A plurality of groups of angle adjustment screw holes 8011 are provided on the angle adjustment fixing plate 801. The front end of the support chassis 13 is supported by the rotating support shaft 802 and can rotate around the rotating support shaft 802. The middle part of the support chassis 13 is fixed to any group of angle adjustment screw holes 8011 on the angle adjustment fixing plate 801 by bolts. During the installation of the present invention, first adjust the angle of the support chassis 13 and install it in the triangular support 8. The support chassis 13 is locked by being fixed to a corresponding group of angle adjustment screw holes 8011 on the angle adjustment fixing plate 801 according to the required support angle, and then the fuel tank 9 is installed on the support chassis 13. The angle adjustment of the support chassis 13 is for two purposes. On the one hand, it is to make the horizontal angles of the fuel tank 9 and the sleeve 1 meet the required specified values. On the other hand, it is to ensure that the overall center of gravity position of structures such as the sleeve 1 and the airtight bracket 7 is within the support range of the triangular support 8.
[0043] As Figure 1 shown, the second cable 12 is fixed to the elevation cylinder 10 by the clip 11 to prevent the second cable 12 from piling up. As Figure 7 shown, in this embodiment, the clip 11 includes a clip groove plate 1102, a first fixed clip plate 1101 and a second fixed clip plate 1104 respectively arranged on both sides of the clip groove plate 1102. Fixed clip grooves 1103 are provided on both sides of the clip groove plate 1102. The second cable 12 is placed in the corresponding fixed clip grooves 1103 and is fixedly connected and pressed and fixed to the clip groove plate 1102 by the fixed clip plate on the corresponding side.
[0044] As Figure 6 shown, in this embodiment, the adjustment support frame 4 includes a support top frame 401 and a bottom frame 403. The bottom frame 403 is placed on the ground. Hollow rods 402 are provided on both sides of the bottom frame 403. A plurality of first adjustment holes are provided on the hollow rods 402. The support top frame 401 is concave, with top frame side rods on both sides. A plurality of second adjustment holes are provided on the top frame side rods. The lower ends of the top frame side rods are inserted into the corresponding hollow rods 402 and are fixedly connected to the hollow rods 402 by a fastening bolt passing through the corresponding first adjustment hole and second adjustment hole and being threadedly connected to a nut.
[0045] As Figure 1As shown, a main bracket interface 702 is provided on the sealed bracket 7, and each bracket thermocouple 701 in the sealed bracket 7 is respectively connected to the main bracket interface 702 through a corresponding third thermocouple signal wire. After the sealed bracket 7 is sleeved on the sleeve 1, the main bracket interface 702 is connected to the temperature patrol instrument 5 through a third cable, thereby achieving the purpose of using the bracket thermocouple 701 to monitor the internal temperature of the sealed bracket 7 in real time.
[0046] The working principle of the present invention is as follows:
[0047] When the present invention works, the sleeve 1 is placed in the sealed bracket 7, and the heating plate 6 on the lower side of the sealed bracket 7 heats the inside of the sealed bracket 7 to increase the temperature of the sealed space. The bracket thermocouple 701 in the sealed bracket 7 monitors the internal temperature of the sealed bracket 7 in real time to meet the specified test requirements. The first thermocouple 104 on the outer wall of the sleeve 1 and the second thermocouple 105 inside the sleeve detect the temperature inside and outside the sleeve 1 to obtain complete, detailed and accurate data on the temperature rise of each part of the product, and judge whether the temperature rise test of the product is qualified based on this. Therefore, the present invention can more truly reflect the performance parameters of the sleeve 1 itself, and while ensuring the product quality, it also has guiding significance for the subsequent product research and development.
[0048] As Figures 3 to 4 shown, a plurality of isolation bent plates 102 are provided along the circumferential direction between the conductive tube 101 and the rolled tube 103 inside the sleeve 1 of the present invention, and a wiring channel 106 is formed between adjacent isolation bent plates 102. The wiring channel 106 facilitates arranging the second thermocouple 105 at various appropriate positions inside the sleeve 1, thereby ensuring accurate and real temperature rise detection inside the sleeve 1, that is, the second thermocouple signal wires 1072 of each second thermocouple 105 can be smoothly led out along the wiring channel 106 without being affected by the thermocouple layout position.
[0049] As Figure 1 and Figure 5As shown in the figure, a sealing adapter plate 2 is provided at the upper end of the sleeve 1. The first thermocouple 104 and the second thermocouple 105 on the side of the sleeve 1 away from the fuel tank 9 (air side) are respectively connected to the sealing adapter plate 2 through corresponding thermocouple signal lines. A connecting pipe 202 is provided inside the sealing adapter plate 2 to ensure the internal sealing of the sleeve 1. One end of the connecting pipe 202 is hermetically connected to the sealing adapter plate 2, and the other end is hermetically connected to the top plate of the sleeve 1. The second thermocouple signal line 1072 inside the sleeve 1 is respectively connected to the insulating wire 204 inside the connecting pipe 202. The first thermocouple signal line 1071 connected to the first thermocouple 104 on the outer wall of the sleeve 1 is connected to the connecting socket 206 on the sealing adapter plate 2 located outside the connecting pipe 202. In this way, when assembling, the thermocouple signal lines corresponding to the first thermocouple 104 on the side of the sleeve 1 away from the fuel tank 9 (air side) and the second thermocouple 105 inside the sleeve 1 are all connected to the sealing adapter plate 2. When the closed bracket 7 is sleeved on the sleeve 1, it will not be affected by any cables. The first thermocouple 104 on the side of the sleeve 1 close to the fuel tank 9 (fuel tank side) is connected to the second cable 12 at the lower end of the sleeve 1 through a corresponding thermocouple signal line. The second cable 12 is led out from the fuel tank 9 and fixed on the riser 10 on the upper side of the fuel tank 9 to avoid cable accumulation.
[0050] As Figure 1 shown in the figure, the present invention can adjust the inclination angle of the support chassis 13 according to the specifications and models of different sleeves 1 and user requirements. On the one hand, this can make the horizontal angles between different specifications of sleeves 1 and the fuel tank 9 reach the required specified values. On the other hand, it is also to ensure that the overall center of gravity position of the sleeve 1, the closed bracket 7, etc. is within the support range of the triangular bracket 8.
[0051] The specific installation process of the present invention is as follows:
[0052] Step 1: Place the support chassis 13 in the triangular bracket 8 and adjust the inclination angle of the support chassis 13. After the position of the support chassis 13 is determined, the front end of the support chassis 13 is supported by the rotating support shaft 802, and the middle part of the support chassis 13 is fixed in a corresponding set of angle adjustment screw holes 8011 on the angle adjustment fixing plate 801 by bolts and locked;
[0053] Step 2: Install the fuel tank 9 on the support chassis 13;
[0054] Step 3: Install the lower end of the sleeve 1 in the fuel tank 9. The second cable 12 at the lower end of the sleeve 1 is led out from the fuel tank 9 and fixed on the riser 10 on the upper side of the fuel tank 9. The first thermocouple 104 on the side of the sleeve 1 away from the fuel tank 9 is respectively connected to the sealing adapter plate 2 through corresponding first thermocouple signal lines 1071;
[0055] Step 4: Connect each bracket thermocouple 701 inside the sealed bracket 7 to the bracket total interface 702 on the sealed bracket 7 through the corresponding third thermocouple signal line respectively;
[0056] Step 5: Sheath the sealed bracket 7 on the sleeve 1, and fix the lower end of the sealed bracket 7 on the fuel tank 9. Since each thermocouple signal line in Step 3 and Step 4 is connected to the sealed adapter plate 2 or the bracket total interface 702 respectively, the process of sheathing the sealed bracket 7 on the sleeve 1 can be free from the influence of any cables, which is convenient for installation;
[0057] Step 6: Place the adjusting support frame 4 under the lower side of the upper end of the sealed bracket 7, and adjust the height of the support top frame 401 at the upper end of the adjusting support frame 4 according to the inclination of the sealed bracket 7 to support the upper end of the sealed bracket 7;
[0058] Step 7: Connect the sealed adapter plate 2 to the corresponding interface of the temperature inspection instrument 5 arranged outside the sealed bracket 7 through the first cable 3, connect the second cable 12 to the corresponding interface of the temperature inspection instrument 5, and connect the bracket total interface 702 on the sealed bracket 7 to the corresponding interface of the temperature inspection instrument 5 through the third cable.
Claims
1. A special hot spot temperature rise test device for UHV bushings, characterized in that: It includes a casing (1), an oil tank (9), a sealed bracket (7), an adjusting support frame (4), a triangular bracket (8) and a supporting chassis (13), wherein the supporting chassis (13) is adjustably arranged in the triangular bracket (8), the oil tank (9) is arranged on the supporting chassis (13), the casing (1) is arranged in the sealed bracket (7), and the lower end of the casing (1) is inserted into the oil tank (9), the lower end of the sealed bracket (7) is mounted on the oil tank (9), the front end of the sealed bracket (7) is supported by the adjusting support frame (4), a heating plate (6) is arranged on the lower side of the sealed bracket (7), a bracket thermocouple (701) is arranged on the inner wall of the upper side of the sealed bracket (7), a first thermocouple (104) is arranged on the outer wall of the casing (1), a rolled tube (103) and a conductive tube (101) are arranged inside the casing (1), and a second thermocouple (105) is arranged between the rolled tube (103) and the conductive tube (101), a sealing adapter plate (2) is arranged at the upper end of the casing (1), and the first thermocouple (104) on the side of the casing (1) away from the oil tank (9) and the second thermocouple (105) inside the casing (1) are respectively connected to the sealing adapter plate (2) through corresponding thermocouple signal lines, the outside of the sealing adapter plate (2) is connected to a temperature inspection instrument (5) arranged outside the sealed bracket (7) through a first cable (3), the first thermocouple (104) on the side of the casing (1) close to the oil tank (9) is correspondingly connected to a second cable (12) at the lower end of the casing (1) through a corresponding thermocouple signal line, and each second cable (12) is fixed on a riser tube (10) on the upper side of the oil tank (9) after being led out from the oil tank (9), and the second cable (12) is connected to the temperature inspection instrument (5).
2. The special hot spot temperature rise test device for UHV bushings according to claim 1, characterized in that: A plurality of isolation bent plates (102) are arranged between the conductive tube (101) and the rolled tube (103) along the circumferential direction, and a wiring channel (106) is formed between adjacent isolation bent plates (102), and a second thermocouple signal line (1072) connected to the second thermocouple (105) is arranged in the corresponding wiring channel (106).
3. The special hot spot temperature rise test device for UHV bushings according to claim 1, characterized in that: A plurality of metal terminals (201) are arranged on the outside of the sealing adapter plate (2), and each metal terminal (201) is respectively connected to a corresponding first cable (3), a connecting tube (202) and an insulating wire (204) are arranged on the inside of the sealing adapter plate (2), and the insulating wire (204) is arranged in the connecting tube (202), one end of the insulating wire (204) is connected to the end of the corresponding metal terminal (201), and the other end is connected to the corresponding second thermocouple signal line (1072) inside the casing (1), the second thermocouple signal line (1072) is connected to the corresponding second thermocouple (105) inside the casing (1), one end of the connecting tube (202) is hermetically connected to the sealing adapter plate (2), and the other end is hermetically connected to the top plate of the casing (1).
4. The special hot spot temperature rise test device for UHV bushings according to claim 3, characterized in that: The inner side of the sealed adapter plate (2) is provided with a connection socket (206), and the other end of the first thermocouple signal wire (1071) corresponding to and connected to the first thermocouple (104) on the side of the sleeve (1) away from the fuel tank (9) is connected to the corresponding connection socket (206). The connection socket (206) is connected to the corresponding metal terminal (201). The other end of the first thermocouple signal wire (1071) corresponding to and connected to the first thermocouple (104) on the side of the sleeve (1) close to the fuel tank (9) is connected to the second cable (12) through a plug-in terminal (1073).
5. The special hot spot temperature rise test device for UHV bushings according to claim 3, characterized in that: Both ends of the connecting pipe (202) are provided with connecting flanges (205). One of the connecting flanges (205) is fixedly connected to the sealed adapter plate (2) through a fastening bolt (203), and the other connecting flange (205) is fixedly connected to the top plate of the sleeve (1) through a fastening bolt (203). Sealing elements are provided between the sealed adapter plate (2) and the corresponding connecting flange (205), and between the top plate of the sleeve (1) and the corresponding connecting flange (205).
6. The special hot spot temperature rise test device for UHV bushings according to claim 1, characterized in that: The triangular support (8) is internally provided with an angle adjustment fixing plate (801) and a rotating support shaft (802). The angle adjustment fixing plate (801) is provided with multiple groups of angle adjustment screw holes (8011). The front end of the support chassis (13) is supported by the rotating support shaft (802), and the middle part of the support chassis (13) is fixed to any group of angle adjustment screw holes (8011) on the angle adjustment fixing plate (801) through bolts and locked.
7. The special hot spot temperature rise test device for UHV bushings according to claim 1, characterized in that: The second cable (12) is fixed to the riser tube (10) through a clip (11). The clip (11) includes a clip groove plate (1102) and a first fixed clip plate (1101) and a second fixed clip plate (1104) respectively arranged on both sides of the clip groove plate (1102). Clips (1103) for accommodating and fixing the second cable (12) are provided on both sides of the clip groove plate (1102).
8. The special hot spot temperature rise test device for UHV bushings according to claim 1, characterized in that: The adjustment support frame (4) includes a support top frame (401) and a chassis (403). The chassis (403) is placed on the ground. Hollow rods (402) are provided on both sides of the chassis (403), and multiple first adjustment holes are provided on the hollow rods (402). Side rods of the support top frame (401) are provided on both sides, and multiple second adjustment holes are provided on the side rods of the support top frame (401). The lower ends of the side rods of the support top frame (401) are inserted into the corresponding hollow rods (402) on the corresponding sides, and are fixedly connected to the hollow rods (402) by passing a fastening bolt through the corresponding first adjustment hole and second adjustment hole and then threading it with a nut.
9. The special hot spot temperature rise test device for UHV bushings according to claim 6, characterized in that: A total bracket interface (702) is provided on the sealed bracket (7). Each bracket thermocouple (701) in the sealed bracket (7) is respectively connected to the total bracket interface (702) through a corresponding third thermocouple signal wire. The total bracket interface (702) is connected to the temperature inspection instrument (5) through a third cable.
10. An installation method of the special hot spot temperature rise test device for the UHV bushing according to claim 9, characterized in that: Including the following steps: Step 1: Place the support chassis (13) in the triangular support (8) and adjust the inclination angle of the support chassis (13). After the position of the support chassis (13) is determined, the front end of the support chassis (13) is supported by the rotating support shaft (802), and the middle part of the support chassis (13) is fixed to a set of angle adjustment screw holes (8011) corresponding on the angle adjustment fixing plate (801) by bolts; Step 2: Install the fuel tank (9) on the support chassis (13); Step 3: Install the lower end of the sleeve (1) in the fuel tank (9), and the second cable (12) at the lower end of the sleeve (1) is led out from the fuel tank (9) and fixed to the elevation cylinder (10) on the upper side of the fuel tank (9). The first thermocouple (104) on the side of the sleeve (1) away from the fuel tank (9) is connected to the sealing adapter plate (2) through the corresponding first thermocouple signal cable (1071); Step 4: Connect each bracket thermocouple (701) inside the closed bracket (7) to the bracket total interface (702) provided on the closed bracket (7) through the corresponding third thermocouple signal cable respectively; Step 5: Slip the closed bracket (7) over the sleeve (1), and fix the lower end of the closed bracket (7) to the fuel tank (9); Step 6: Place the adjustment support frame (4) under the lower end of the upper end of the closed bracket (7), and adjust the height of the support top frame (401) at the upper end of the adjustment support frame (4) according to the inclination of the closed bracket (7) to support the upper end of the closed bracket (7); Step 7: Connect the sealing adapter plate (2) to the temperature inspection instrument (5) provided outside the closed bracket (7) through the first cable (3), connect the second cable (12) to the temperature inspection instrument (5), and connect the bracket total interface (702) on the closed bracket (7) to the temperature inspection instrument (5) through the third cable.