A transformer insulation paper aging test device

Abstract

The invention relates to the technical field of insulating paper detection, and discloses a transformer insulating paper aging test device, comprising a workbench, wherein a detection mechanism is arranged on the top of the workbench; the detection mechanism comprises a detection barrel, wherein the detection barrel is connected to the top of the workbench and is used to immerse the insulating paper in insulating oil; a heating cylinder is arranged on the right side of the detection barrel and is used to simulate the aging environment of the insulating paper; a hydraulic cylinder is arranged on the outside of the heating cylinder and is used to accelerate the heat transfer of the heating cylinder, and the insulating oil inside the detection barrel is heated by a heat-conducting medium flowing in a heating flow channel to simulate the high-temperature environment when the transformer is running, and heat is transferred by static contact, which can effectively avoid the situation that the continuous flow of airflow aggravates stress aging and causes deviation in the effect of actual testing, and the heating flow channel arranged in a spiral shape can effectively increase the contact area with the detection barrel and improve the heat conduction effect.

Description

Technical Field

[0001] The invention relates to the technical field of insulating paper detection, in particular to an aging test device for transformer insulating paper. Background Art

[0002] The function of insulating paperboard is to insulate the inside of the transformer to prevent discharge inside the transformer. It is usually made into oil paper. During the use of insulating paperboard, the aging speed of the insulating paperboard will be accelerated due to the constant change of the temperature of the external environment and the internal environment of the transformer. In order to conduct aging tests on the different insulating paperboards produced.

[0003] Chinese patent publication number CN211061638U discloses "a transformer oil-paper insulation board aging test device", including a test box, a pair of blocks and a pair of clamping blocks for installing oil-paper insulation boards are arranged in the test box, a fan is installed on the front face of the test box, and a generator is arranged at the front end of the test box. The generator includes a shell, a connecting chamber and a fan-shaped column. A pair of generator cavities are arranged in the shell, and a number of heating plates and a number of cooling plates are respectively installed in the two generator cavities. The two generator cavities are connected to the connecting chamber through an air outlet, and the arc surface of the fan-shaped column fits the mouth of the air outlet. The transformer oil-paper insulation board aging test device, through the generator, can make the air used for heating and cooling by the heating plate and the cooling plate be alternately pumped to the surface of the oil-paper insulation board by the fan under the rotation of the fan-shaped column, so as to achieve the aging test effect of the oil-paper insulation board under a large temperature difference.

[0004] In this scheme, a generating device is arranged at the front end of the test box, so that the air used for heating and cooling by the heating plate and the refrigeration plate can be alternately pumped to the surface of the oil-paper insulation board by the fan under the rotation of the fan-shaped column, thereby achieving the aging test effect of the oil-paper insulation board under a large temperature difference. However, in actual use, the insulation is used between coils, between the coil and the iron core, at the end of the coil, etc., and the environment is generally relatively closed. The temperature is simulated by changing the flow of airflow, which is different from the actual working environment and cannot well reflect the actual operating status. For example, oil-immersed transformers usually require paper insulation boards, and stress aging will be aggravated when airflow passes through. Vibration stress will cause cracking and peeling of the insulation paperboard, thereby generating air gaps and developing electrical aging, which is quite different from the actual operating scenario and cannot well reflect the aging performance of the insulation paperboard in the real scenario. Therefore, a transformer insulation paper aging test device is proposed to solve the above-mentioned problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a transformer insulation paper aging test device, which solves the problem that stress aging is aggravated when airflow passes through, and vibration stress causes cracking and peeling of the insulation paperboard, thereby generating air gaps.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: a transformer insulation paper aging test device, comprising a workbench, a detection mechanism is arranged on the top of the workbench;

[0009] The detection mechanism includes a detection barrel, which is connected to the top of the workbench and is used to immerse the insulating paper in the insulating oil;

[0010] A heating cylinder is provided on the right side of the detection barrel to simulate the aging environment of the insulation paper;

[0011] A hydraulic cylinder is arranged outside the heating cylinder to accelerate the heat transfer of the heating cylinder;

[0012] A heating flow channel is provided on the detection barrel, and annular grooves are provided above and below the detection barrel respectively. The annular grooves are connected with the interior of the heating cylinder through a connecting pipe. The insulating oil inside the detection barrel is heated by the heat-conducting medium flowing in the heating flow channel to simulate the high-temperature environment when the transformer is running. Heat is transferred by static contact, which can effectively avoid the situation where the continuous flow of airflow aggravates stress aging and causes deviations in the actual test results. The spirally arranged heating flow channel can effectively increase the contact area with the detection barrel and improve the efficiency of heat conduction.

[0013] Preferably, the top of the workbench is connected to a support plate, and an electric push rod is connected to a position below the top of the support plate corresponding to the detection barrel, and the bottom of the electric push rod is connected to a placement frame, and the interior of the placement frame clamps the detection sample. The electric push rod drives the detection sample in the placement frame to descend so that it is immersed in the insulating oil in the detection barrel to facilitate detection.

[0014] Preferably, a cleaning rod is connected to the support plate below the placement frame for cleaning the test sample.

[0015] Preferably, the cleaning rod is composed of a support rod, a scraper, and a collecting trough. The scrapers are respectively connected to both sides of the support rod, and the scrapers are arranged at an angle and are symmetrical to each other. The collecting trough is opened at the top of the scraper. When the test sample placed in the frame descends, both sides of the test sample will contact the scraper. The scraper will wipe off impurities, dust and other dirt on the surface of the test sample, and drop them into the collecting trough for collection, avoiding problems that affect the test results. After the test of the test sample is completed, it will contact the scraper during the lifting process. At this time, the scraper will scrape off the insulating oil on the test sample, which is convenient for subsequent observation of the insulating paper.

[0016] Preferably, a heat conducting tube is provided inside the heating tube, and an annular magnetic piston is slidably connected to the inner wall of the heating tube. A heating rod is connected to the inner wall of the heat conducting tube. By starting the heating rod to increase the temperature, the heat is transferred to the heat conducting medium in the heating tube through the heat conducting tube. The movement of the annular magnetic piston in the heating tube can promote the heat conducting medium to flow in the heating channel.

[0017] Preferably, a heat conduction groove is provided on the inner wall of the heat conduction pipe, and the heat conduction pipe is connected to the inner wall of the heating tube through a support block. By providing the support block, a certain gap is created between the heat conduction pipe and the connecting pipe to avoid affecting the circulation of the heat conduction medium. By providing the heat conduction groove on the inner wall of the heat conduction pipe, the heat transfer area of ​​the heat conduction pipe can be increased, thereby improving the heat transfer efficiency.

[0018] Preferably, the hydraulic cylinder is connected to the outer wall of the heating cylinder, the inner wall of the hydraulic cylinder is slidably connected with an arc-shaped magnetic piston, and the arc-shaped magnetic piston is magnetically attracted to the annular magnetic piston, and an exhaust hole is opened on the top of the hydraulic cylinder for air circulation. When the arc-shaped magnetic piston in the hydraulic cylinder moves, due to the mutual magnetic attraction between the arc-shaped magnetic piston and the annular magnetic piston, the arc-shaped magnetic piston will pull the annular magnetic piston to move together.

[0019] Preferably, the hydraulic cylinder is connected to the interior of the detection barrel through an extrusion tube, and the inner wall of the detection barrel is slidably connected with a pressure plate. When the detection sample in the placement frame is driven to descend by the electric push rod, when the placement frame contacts the pressure plate, the pressure plate will be squeezed to sink. When the pressure plate sinks, the liquid squeezed out of the detection barrel will be injected into the hydraulic cylinder through the extrusion tube, thereby squeezing the arc-shaped magnetic suction piston and causing it to rise in the hydraulic cylinder.

[0020] Preferably, a first spring is connected between the pressure plate and the inner wall of the detection barrel. When the pressure plate is lifted after the detection is completed, the tension of the first spring will push the pressure plate to reset and extract the liquid in the hydraulic cylinder, causing the arc-shaped magnetic piston to sink and reset, so as to facilitate the next detection.

[0021] Preferably, a second spring is connected to the top of the heating cylinder. By setting the second spring, when the annular magnetic piston contacts the second spring, the tension generated by the second spring will become larger and larger during the gradual compression of the second spring. When the tension is greater than the attraction generated by the arc-shaped magnetic piston, the annular magnetic piston will break away from the traction of the arc-shaped magnetic piston, and the annular magnetic piston will gradually sink under the action of the second spring tension and the annular magnetic piston's own gravity. In the process of the gradual sinking of the annular magnetic piston, the heat-conducting medium will be pushed and squeezed in the heating flow channel to facilitate the transfer of heat to the insulating oil. A one-way valve is connected to the inner wall of the annular magnetic piston. By setting the one-way valve, when the arc-shaped magnetic piston pulls the annular magnetic piston to rise, the one-way valve will open so that the annular magnetic piston encounters less resistance when rising, thereby preventing the annular magnetic piston from moving too slowly due to excessive resistance and breaking away from the traction of the arc-shaped magnetic piston.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a transformer insulation paper aging test device, which has the following beneficial effects:

[0024] 1. The transformer insulation paper aging test device heats the insulating oil inside the detection barrel by the heat-conducting medium flowing in the heating flow channel to simulate the high-temperature environment when the transformer is running. Heat is transferred by static contact, which can effectively avoid the situation where the continuous flow of airflow aggravates stress aging and causes deviations in the actual test results. The spirally arranged heating flow channel can effectively increase the contact area with the detection barrel and improve the efficiency of heat conduction.

[0025] 2. In the transformer insulation paper aging test device, when the test sample in the placement frame descends, the two sides of the test sample will contact the scraper, and the scraper will wipe off the impurities, dust and other dirt on the surface of the test sample, and drop them into the collection tank for collection, so as to avoid problems affecting the test results. After the test of the test sample is completed, it will contact the scraper during the lifting process. At this time, the scraper will scrape off the insulating oil on the test sample, which is convenient for subsequent observation of the insulation paper.

[0026] 3. The transformer insulation paper aging test device, when the placement frame contacts the pressure plate, will squeeze the pressure plate to sink, when the pressure plate sinks, the liquid squeezed out of the detection barrel will be injected into the hydraulic cylinder through the squeezing tube, thereby squeezing the arc-shaped magnetic piston, causing it to rise in the hydraulic cylinder, when the arc-shaped magnetic piston in the hydraulic cylinder moves, due to the interaction of the magnetic attraction between the arc-shaped magnetic piston and the annular magnetic piston, the arc-shaped magnetic piston will pull the annular magnetic piston to move together, and during the movement of the annular magnetic piston, it will push the squeezed heat-conducting medium to flow in the heating flow channel, so that the heat-conducting medium in the heating flow channel and the inner wall of the heating cylinder exchange the heat-conducting medium to ensure the heating effect, so as to facilitate the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the detection mechanism in the present invention;

[0029] Figure 3 is a cross-sectional view of the detection barrel in the present invention;

[0030] Figure 4 is a cross-sectional view of the hydraulic cylinder of the present invention;

[0031] Figure 5 is a cross-sectional view of the heating tube in the present invention;

[0032] Figure 6 is a cross-sectional view of the heat conducting pipe in the present invention;

[0033] Figure 7 It is a schematic structural diagram of the cleaning rod in the present invention.

[0034] In the figure: 1. workbench; 2. detection mechanism; 21. detection barrel; 212. heating flow channel; 213. annular groove; 214. pressure plate; 215. first spring; 22. hydraulic cylinder; 221. arc magnetic piston; 222. extrusion tube; 223. exhaust hole; 23. heating cylinder; 231. annular magnetic piston; 232. connecting pipe; 233. heat pipe; 2331. heating rod; 2332. heat conduction groove; 2333. support block; 234. one-way valve; 235. second spring; 3. support plate; 31. electric push rod; 32. placement frame; 33. detection sample; 4. cleaning rod; 41. support rod; 42. scraper; 43. collecting tank. DETAILED DESCRIPTION

[0035] 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.

[0036] Example 1

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 7As shown, a transformer insulation paper aging test device includes a workbench 1, a detection mechanism 2 is arranged on the top of the workbench 1, and the detection mechanism 2 includes a detection barrel 21, the detection barrel 21 is connected to the top of the workbench 1, and is used to immerse the insulation paper in the insulation oil, a heating cylinder 23 is arranged on the right side of the detection barrel 21, and is used to simulate the aging environment of the insulation paper, and a hydraulic cylinder 22 is arranged outside the heating cylinder 23, and is used to accelerate the heat transfer of the heating cylinder 23, and a heating flow channel 212 is opened on the detection barrel 21, and the detection barrel 21 is respectively opened above and below the heating flow channel 212. The annular groove 213 is connected to the interior of the heating cylinder 23 through the connecting pipe 232. The insulating oil inside the detection barrel 21 is heated by the heat-conducting medium flowing in the heating channel 212 to simulate the high temperature environment when the transformer is running. The heat is transferred by static contact, which can effectively avoid the situation where the continuous flow of airflow aggravates stress aging and causes deviation in the actual test effect. The spirally arranged heating channel 212 can effectively increase the contact area with the detection barrel 21 and improve the efficiency of heat conduction. The top of the workbench 1 is connected with a support plate 3. An electric push rod 31 is connected to the position corresponding to the detection barrel 21 below the top of the support plate 3, and a placement frame 32 is connected to the bottom of the electric push rod 31. The detection sample 33 is clamped inside the placement frame 32. The detection sample 33 in the placement frame 32 is driven down by the electric push rod 31 to be immersed in the insulating oil in the detection barrel 21 to facilitate detection. A cleaning rod 4 is connected to the position of the support plate 3 below the placement frame 32 for cleaning the detection sample 33. The cleaning rod 4 consists of a support rod 41, a scraper 42, and a collecting tank 43. The scraper 42 is respectively connected to the support rod 41 and the collecting tank 43. On both sides, the scraper 42 is inclined and symmetrical to each other, and the collecting groove 43 is opened at the top of the scraper 42. When the test sample 33 in the placement frame 32 descends, the two sides of the test sample 33 will contact the scraper 42. The scraper 42 will wipe off the impurities, dust and other dirt on the surface of the test sample 33, and drop them into the collecting groove 43 for collection, so as to avoid problems affecting the test results. After the test of the test sample 33 is completed, it will contact the scraper 42 during the lifting process. At this time, the scraper 42 will scrape off the insulating oil on the test sample 33, so as to facilitate the subsequent observation of the insulating paper.

[0038] In this embodiment, the electric push rod 31 drives the test sample 33 in the placement frame 32 to descend, so that it is immersed in the insulating oil in the detection barrel 21 to facilitate the detection. When the test sample 33 in the placement frame 32 descends, both sides of the test sample 33 will contact the scraper 42, and the scraper 42 will wipe off the impurities, dust and other dirt on the surface of the test sample 33, and drop it into the collection tank 43 for collection, so as to avoid problems affecting the test results. The connection pipe 232 is connected with the interior of the heating cylinder 23, and the heat-conducting medium flowing in the heating flow channel 212 is heated to the detection barrel 21. 1 is heated to simulate the high temperature environment of the transformer during operation, and heat is transferred by static contact, which can effectively avoid the situation where the continuous flow of airflow aggravates stress aging and causes deviations in the actual test results. The spirally arranged heating channel 212 can effectively increase the contact area with the detection barrel 21 and improve the efficiency of heat conduction. After the test sample 33 is tested, it will contact the scraper 42 during the lifting process. At this time, the scraper 42 will scrape off the insulating oil on the test sample 33, which is convenient for subsequent observation of the insulating paper.

[0039] Example 2

[0040] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, a heat conducting pipe 233 is arranged inside the heating cylinder 23, and an annular magnetic piston 231 is slidably connected to the inner wall of the heating cylinder 23, and a heating rod 2331 is connected to the inner wall of the heat conducting pipe 233. By starting the heating rod 2331 to increase the temperature, the heat is transferred to the heat conducting medium in the heating cylinder 23 through the heat conducting pipe 233. The movement of the annular magnetic piston 231 in the heating cylinder 23 can promote the heat conducting medium to flow in the heating flow channel 212. A heat conducting groove 2332 is arranged on the inner wall of the heat conducting pipe 233. The heat conducting pipe 233 is connected to the inner wall of the heating cylinder 23 through a supporting block 2333. The supporting block 2333 is provided to ensure that a certain gap exists between the heat conducting pipe 233 and the connecting pipe 232 to avoid affecting the circulation of the heat conducting medium. By providing the heat conducting groove 2332 on the inner wall of the heat conducting pipe 233, the heat transfer area of ​​the heat conducting pipe 233 can be increased, and the heat transfer efficiency can be improved. The hydraulic cylinder 22 is connected to the outer wall of the heating cylinder 23. The inner wall of the cylinder 22 is slidably connected with an arc-shaped magnetic piston 221, and the arc-shaped magnetic piston 221 is magnetically attracted to the annular magnetic piston 231. An exhaust hole 223 is provided on the top of the hydraulic cylinder 22 for air circulation. When the arc-shaped magnetic piston 221 in the hydraulic cylinder 22 moves, due to the interaction of the magnetic attraction between the arc-shaped magnetic piston 221 and the annular magnetic piston 231, the arc-shaped magnetic piston 221 will pull the annular magnetic piston 231 to move together. The hydraulic cylinder 22 is connected with the interior of the detection barrel 21 through the extrusion tube 222. The inner wall of the detection barrel 21 is slidably connected with a pressing plate 214. When the detection sample 33 in the placement frame 32 is driven to descend by the electric push rod 31, when the placement frame 32 contacts the pressing plate 214, it will squeeze the pressing plate 214 to sink. When the pressing plate 214 sinks, the liquid squeezed out of the detection barrel 21 will be injected into the hydraulic cylinder 22 through the extrusion tube 22, thereby squeezing the arc-shaped magnetic piston 221 and causing it to rise in the hydraulic cylinder 22.

[0041] In this embodiment, when the detection sample 33 in the placement frame 32 is driven to descend by the electric push rod 31, when the placement frame 32 contacts the pressure plate 214, it will squeeze the pressure plate 214 to sink. When the pressure plate 214 sinks, the liquid squeezed out of the detection barrel 21 will be injected into the hydraulic cylinder 22 through the squeezing tube 222, thereby squeezing the arc-shaped magnetic piston 221, causing it to rise in the hydraulic cylinder 22. When the arc-shaped magnetic piston 221 in the hydraulic cylinder 22 moves, due to the interaction of the magnetic attraction between the arc-shaped magnetic piston 221 and the annular magnetic piston 231, the arc-shaped magnetic piston 221 will pull the annular magnetic piston 231 to move together, and the heating rod 2331 is started to heat up, and the heat is transferred to the heat-conducting medium in the heating cylinder 23 through the heat-conducting tube 233. The movement of the annular magnetic piston 231 in the heating cylinder 23 can promote the heat-conducting medium to flow in the heating channel 212.

[0042] Example 3

[0043] like Figure 3 , Figure 5 As shown, a first spring 215 is connected between the pressure plate 214 and the inner wall of the detection barrel 21. When the detection is completed, the pressure plate 214 is lifted up, and the tension of the first spring 215 pushes the pressure plate 214 to reset, and extracts the liquid in the hydraulic cylinder 22, so that the arc-shaped magnetic suction piston 221 sinks and resets, so as to facilitate the next detection. A second spring 235 is connected to the top of the heating cylinder 23. By setting the second spring 235, when the annular magnetic piston 231 contacts the second spring 235, in the process of gradually compressing the second spring 235, the tension generated by the second spring 235 will also become larger and larger. When the tension is greater than the attraction generated by the arc-shaped magnetic suction piston 221, the annular magnetic piston 231 will When the arc-shaped magnetic piston 221 is separated from the traction, the annular magnetic piston 231 will gradually sink under the action of the tension of the second spring 235 and the gravity of the annular magnetic piston 231 itself. In the process of the gradual sinking of the annular magnetic piston 231, the heat-conducting medium will be pushed and squeezed in the heating channel 212 to facilitate the transfer of heat to the insulating oil. The inner wall of the annular magnetic piston 231 is connected to a one-way valve 234. By setting the one-way valve 234, when the arc-shaped magnetic piston 221 pulls the annular magnetic piston 231 to rise, the one-way valve 234 will open to reduce the resistance encountered by the annular magnetic piston 231 when it rises, thereby preventing the annular magnetic piston 231 from moving too slowly due to excessive resistance and being separated from the traction of the arc-shaped magnetic piston 221.

[0044] In this embodiment, by providing the second spring 235, when the annular magnetic piston 231 contacts the second spring 235, in the process of gradually compressing the second spring 235, the tension generated by the second spring 235 will become larger and larger. When the tension is greater than the attraction generated by the arc-shaped magnetic piston 221, the annular magnetic piston 231 will be separated from the traction of the arc-shaped magnetic piston 221, and the annular magnetic piston 231 will gradually sink under the action of the tension of the second spring 235 and the gravity of the annular magnetic piston 231 itself. In the process of the gradual sinking of the annular magnetic piston 231, it will push and squeeze the heat-conducting medium in the heating flow channel 212 to facilitate the transfer of heat to the insulating oil. When the detection is completed, the pressure plate 214 is lifted, and the tension of the first spring 215 will push the pressure plate 214 to reset, and extract the liquid in the hydraulic cylinder 22, so that the arc-shaped magnetic piston 221 sinks and resets, so as to facilitate the next detection.

[0045] How it works

[0046] In summary, the transformer insulation paper aging test device starts the heating rod 2331 to heat up, and the heat is transferred to the heat-conducting medium in the heating cylinder 23 through the heat-conducting tube 233, and then the test sample 33 is placed in the placement frame 32, and the test sample 33 in the placement frame 32 is driven to descend by the electric push rod 31, so that it is immersed in the insulating oil in the detection barrel 21 to facilitate the detection. When the test sample 33 in the placement frame 32 descends, both sides of the test sample 33 will contact the scraper 42, and the scraper 42 will wipe off the impurities, dust and other dirt on the surface of the test sample 33, and drop it into the collection tank 43 for collection, so as to avoid problems affecting the test results. When the placement frame 32 contacts the pressing plate 214, it will squeeze The pressure plate 214 sinks, and when the pressure plate 214 sinks, the liquid squeezed out of the detection barrel 21 will be injected into the hydraulic cylinder 22 through the squeezing tube 222, thereby squeezing the arc-shaped magnetic piston 221, causing it to rise in the hydraulic cylinder 22. When the arc-shaped magnetic piston 221 in the hydraulic cylinder 22 moves, due to the interaction of the magnetic attraction between the arc-shaped magnetic piston 221 and the annular magnetic piston 231, the arc-shaped magnetic piston 221 will pull the annular magnetic piston 231 to move together. The movement of the annular magnetic piston 231 in the heating cylinder 23 can push the heat-conducting medium to flow in the heating flow channel 212, which is connected to the interior of the heating cylinder 23 through the connecting tube 232. The heat-conducting medium flowing in the heating flow channel 212 The insulating oil inside the detection barrel 21 is heated to simulate the high temperature environment when the transformer is running. Heat is transferred by static contact, which can effectively avoid the situation where the continuous flow of airflow exacerbates stress aging and causes deviations in the actual test results. The spirally arranged heating flow channel 212 can effectively increase the contact area with the detection barrel 21 and improve the efficiency of heat conduction. When the annular magnetic piston 231 contacts the second spring 235, the tension generated by the second spring 235 will become larger and larger during the gradual compression of the second spring 235. When the tension is greater than the attraction generated by the arc-shaped magnetic piston 221, the annular magnetic piston 231 will break away from the traction of the arc-shaped magnetic piston 221, and the annular The magnetic piston 231 will gradually sink under the action of the tension of the second spring 235 and the gravity of the annular magnetic piston 231 itself. In the process of the gradual sinking of the annular magnetic piston 231, it will push and squeeze the heat-conducting medium in the heating channel 212 to facilitate the transfer of heat to the insulating oil. After the test of the test sample 33 is completed, it will contact the scraper 42 during the lifting process. At this time, the scraper 42 will scrape off the insulating oil on the test sample 33 to facilitate the subsequent observation of the insulating paper. After the test is completed, the pressure plate 214 is lifted, and the tension of the first spring 215 will push the pressure plate 214 to reset, and extract the liquid in the hydraulic cylinder 22, so that the arc-shaped magnetic suction piston 221 sinks and resets, so as to facilitate the next test.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A transformer insulation paper aging test device, comprising a workbench (1), characterized in that: A detection mechanism (2) is arranged on the top of the workbench (1), and the detection mechanism (2) comprises a detection barrel (21). The detection barrel (21) is connected to the top of the workbench (1) and is used to immerse the insulating paper in the insulating oil. A heating barrel (23) is arranged on the right side of the detection barrel (21) and is used to simulate the aging environment of the insulating paper. A hydraulic cylinder (22) is arranged outside the heating barrel (23) and is used to accelerate the heat transfer of the heating barrel (23). A heating flow channel (212) is opened on the detection barrel (21). The detection barrel (21) is located in the heating flow channel ( Annular grooves (213) are respectively provided above and below the heating flow channel (212) to connect the heating flow channel (212) with the annular groove (213); the upper annular groove (213) is connected to the top of the heating cylinder (23) through a connecting pipe (232); the top of the workbench (1) is connected to a support plate (3); a position below the top of the support plate (3) corresponding to the detection barrel (21) is connected to an electric push rod (31); the bottom of the electric push rod (31) is connected to a placement frame (32); the inside of the placement frame (32) holds a detection sample (33); the heating cylinder (23) is connected to the upper surface of the heating cylinder (23); A heat conducting pipe (233) is arranged inside, the inner wall of the heating cylinder (23) is slidably connected to an annular magnetic piston (231), the inner wall of the heat conducting pipe (233) is connected to a heating rod (2331), the inner wall of the heat conducting pipe (233) is provided with a heat conducting groove (2332), the heat conducting pipe (233) is connected to the inner wall of the heating cylinder (23) through a support block (2333), the hydraulic cylinder (22) is connected to the outer wall of the heating cylinder (23), the inner wall of the hydraulic cylinder (22) is slidably connected to an arc-shaped magnetic piston (221), and the arc-shaped magnetic piston (22 1) is magnetically attracted to an annular magnetic piston (231); an exhaust hole (223) is provided at the top of the hydraulic cylinder (22); the bottom of the hydraulic cylinder (22) is connected to the bottom of the detection barrel (21) through an extrusion tube (222); a pressure plate (214) is slidably connected to the inner wall of the detection barrel (21); a first spring (215) is connected between the pressure plate (214) and the inner wall of the detection barrel (21); a second spring (235) is connected to the top of the heating cylinder (23); and a one-way valve (234) is connected to the inner wall of the annular magnetic piston (231).

2. A transformer insulation paper aging test device according to claim 1, characterized in that: The support plate (3) is connected to a cleaning rod (4) at a position below the placement frame (32) for cleaning the test sample (33).

3. A transformer insulation paper aging test device according to claim 2, characterized in that: The cleaning rod (4) is composed of a support rod (41), a scraper (42), and a collecting groove (43); the scrapers (42) are respectively connected to two sides of the support rod (41), and the scrapers (42) are arranged in an inclined manner and are symmetrical to each other; the collecting groove (43) is opened on the top of the scraper (42).

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