CN118655401A - A temperature rise test tool and test method for casing - Google Patents

Abstract

The invention discloses a temperature rise test tool and test method for bushing, which relate to the technical field of transformer insulation, and include an oil storage tank and a bushing body, wherein a mounting plate is arranged on one side of the oil storage tank, a pump body is fixedly mounted on one side of the top of the mounting plate, a heater is fixedly mounted on the top of the mounting plate, an oil extraction pipe is penetrated and connected to one end of the pump body, and the other end of the pump body is penetrated and connected to the heater through a pipeline, an oil delivery pipe is penetrated and connected to one end of the heater, and the oil delivery pipe is penetrated and connected to the oil storage tank; a rotating assembly is arranged inside and outside the oil storage tank, and transformer oil inside the oil storage tank can be slowly stirred, so as to avoid hot and cold stratification between the heated transformer oil and the transformer oil that has not been heated after entering the oil storage tank, so as to avoid uneven internal oil temperature, and to avoid affecting the reading of a temperature measuring sensor, causing errors in subsequent tests, and improving the test accuracy.

Description

A temperature rise test tool and test method for casing

Technical Field

The invention relates to the technical field of transformer insulation, and in particular to a temperature rise test tool and a test method for a bushing.

Background Art

During the transformer bushing temperature rise test, the transformer oil temperature in the test oil tank needs to be heated to 60±2°C higher than the ambient temperature. For the DC converter transformer bushing temperature test, the oil temperature is required to be controlled within the range of 90±2°C. The acceptance criteria of the test are: The test is carried out continuously. If the temperature change within 1h does not exceed ±1°C, the temperature rise is considered to have reached a stable state.

For example, a transformer bushing temperature rise test device with publication number CN115389981A receives the transformer oil temperature detected by the first temperature sensor through the controller in the oil processing device, and compares it with the preset temperature range. When the oil temperature is lower than the lower limit of the preset temperature range, the heater is controlled to be turned on, the cooler is controlled to be turned off, and the oil pump is controlled to be turned on; when the oil temperature is higher than the upper limit of the preset temperature range, the heater is controlled to be turned off, the cooler is controlled to be turned on, and the oil pump is controlled to be turned on. The transformer oil temperature is adjusted by the heater and the cooler, and the transformer oil in the closed loop is driven by the oil pump to circulate, so that the transformer oil temperature in the oil tank is uniform. However, in actual use, the heated transformer oil cannot be mixed with the oil inside the oil tank after entering the oil tank, so that the transformer oil inside the oil tank is prone to uneven temperature. If the temperature is uneven, it will affect the reading of the temperature sensor to a certain extent, which is easy to cause errors in the test and affect the accuracy of the test. There are certain use defects.

Therefore, we proposed a temperature rise test tool and test method for casing to solve the above problems.

Summary of the invention

The object of the present invention is to provide a temperature rise test tool and test method for bushing, so as to solve the problem that the heated transformer oil cannot be mixed with the oil inside the oil tank after entering the oil tank, which makes the transformer oil inside the oil tank prone to temperature unevenness. If the temperature is uneven, it will affect the reading of the temperature sensor to a certain extent, easily cause errors in the test, and affect the accuracy of the test.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a temperature rise test tool for casing, comprising an oil storage tank and a casing body, a mounting plate is provided on one side of the oil storage tank, a pump body is fixedly installed on one side of the top of the mounting plate, and a heater is fixedly installed above the mounting plate, one end of the pump body is penetrated and connected with an oil pumping pipe, and the other end of the pump body is penetrated and connected with the heater through a pipeline, one end of the heater is penetrated and connected with an oil delivery pipe, and the oil delivery pipe is penetrated and connected with the oil storage tank, and a temperature sensor is provided on one side of the inside of the oil storage tank;

Also includes:

A rotating assembly is arranged inside and outside the oil storage tank;

A fixing assembly is arranged on the top of the oil storage tank;

The shell is connected to one end of the oil pumping pipe, one end of the shell is connected to the oil storage tank through the pipeline, and the inside of the shell is rotatably connected to a rotating shaft, and a plurality of rotating plates are fixedly installed on the outside of the rotating shaft, and one end of the rotating shaft passes through the shell and is symmetrically rotatably connected to a supporting frame on the outside, and both supporting frames are fixedly connected to the oil storage tank;

A rotating rod is rotatably connected to the lower part of the oil storage tank, one end of the rotating rod passes through the oil storage tank and is rotatably connected to a fixing frame on the outside, and the fixing frame is fixedly connected to the upper support frame, and a first bevel gear is fixedly installed on the top of the rotating shaft, and a second bevel gear is fixedly installed on one end of the rotating rod, and the first bevel gear is meshed with the second bevel gear;

A rotating rod is rotatably connected to the inner bottom end of the oil storage tank, a fourth bevel gear is fixedly installed on the top of the rotating rod, and a third bevel gear is fixedly installed on one end of the rotating rod outside close to the fourth bevel gear, and the third bevel gear is meshingly connected with the fourth bevel gear, and at the same time, one side of the rotating rod outside close to the third bevel gear is rotatably connected to a limiting frame with a side of the rotating rod outside close to the fourth bevel gear, and two sets of rotating blades are symmetrically installed on the outside of the rotating rod.

Preferably, a fixing ring is fixedly installed on the upper part of the interior of the oil storage tank, and an annular groove is penetrated through the top of the fixing ring, and a plurality of arc plates are hingedly connected to the interior of the oil storage tank below the fixing ring, and a movable ring is arranged below the plurality of arc plates, and a fixing rod is fixedly installed on the top of the movable ring below the plurality of arc plates, and a ball is hinged on the top of the fixing rod, and the ball is rotatably connected to the arc plate.

By adopting the above technical solution, the transformer oil after heating can leak out through the annular groove and be guided by the arc plate, so the addition range can be improved.

Preferably, a fixing sleeve is symmetrically installed on the outer side of the movable ring, and the interiors of the two fixing sleeves are slidably connected with positioning rods, and fixing blocks are symmetrically installed on both ends of the positioning rods, and the fixing blocks are fixedly connected to the oil storage tank.

By adopting the above technical solution, the movement of the movable ring is limited, thereby improving the stability of the movement of the movable ring.

Preferably, cams are symmetrically installed on the outside of the rotating rod, and movable frames are provided on the outsides of the two cams, and limit sleeves are symmetrically installed on both sides of the movable frames. At the same time, the inner sliding connection of the limit sleeves is connected to the limit rod, and mounting blocks are symmetrically installed on both ends of the limit rod, and the mounting blocks are fixedly connected to the oil storage tank.

By adopting the above technical solution, the rotation of the rotating rod can drive the movable frame to move, and the movement of the movable frame is limited.

Preferably, connecting ropes are fixedly installed on the tops of the two movable frames, and one end of the two connecting ropes away from the movable frames is fixedly connected to the movable ring.

By adopting the above technical solution, the movement of the movable frame can drive the movement of the movable ring.

Preferably, an annular buoy is fixedly mounted on the bottom of the movable ring.

By adopting the above technical solution, the annular buoy can move the movable ring by pushing it up with buoyancy.

Preferably, the fixing assembly includes a through groove extending through the top of the oil storage tank, and positioning frames are symmetrically installed on both sides of the through groove at the top of the oil storage tank, and movable rods are slidably connected inside the two positioning frames, and arc sleeves are fixedly installed at the ends of the two movable rods that are close to each other.

By adopting the above technical solution, the sleeve body can be fixed, which makes it convenient for users to fix the sleeve body and avoids displacement of the sleeve body during testing.

Preferably, a mounting frame is fixedly installed on one side of the through groove at the top of the oil storage tank, and a screw is connected to the internal thread of the mounting frame, and a knob is fixedly installed on one end of the screw, while a connecting block is movably connected to the other end of the screw, and connecting rods are symmetrically hinged on one side of the connecting block, and two movable rods are respectively fixed and hinged at one end of the two connecting rods away from the connecting block.

By adopting the above technical solution, the movement of the screw rod can drive the arc sleeve to move, thereby facilitating the fixing of the sleeve body.

Compared with the prior art, the beneficial effects of the present invention are as follows: the temperature rise test tool and test method for bushing can slowly stir the transformer oil inside the oil storage tank, thereby avoiding hot and cold stratification between the heated transformer oil and the unheated transformer oil after entering the oil storage tank, avoiding uneven internal oil temperature, avoiding affecting the reading of the temperature measuring sensor, causing errors in subsequent tests, and improving the test accuracy;

1. Rotating components are arranged inside and outside the oil storage tank. The shell is pumped out through an oil extraction pipe, so that the transformer oil inside the oil storage tank can enter the pump body through the shell, and then heated by a heater, so that the heated transformer oil enters the oil storage tank through an oil delivery pipe. When the transformer oil passes through the shell, it can impact the rotating plate, so that the rotating shaft can be driven to rotate. After the rotating shaft rotates, the meshing of the first bevel gear and the second bevel gear drives the rotating rod to rotate. After the rotating rod rotates, the meshing of the third bevel gear and the fourth bevel gear drives the rotating rod to rotate, so that the rotating blades rotate slowly, and the transformer oil inside the oil storage tank can be slowly stirred, so as to avoid the transformer oil after heating enters the oil storage tank and the transformer oil which has not been heated, and avoid uneven internal oil temperature, avoid affecting the reading of the temperature measuring sensor, and cause errors in subsequent tests, thereby improving the test accuracy.

2. The transformer oil after being heated and flowing out of the oil delivery pipe can enter the interior of the fixed ring and leak out through the annular groove, so that the adding range of the transformer oil can be increased. The rotating rod can drive the two cams to rotate while rotating. After the cam rotates, it can be connected with the sliding of the movable frame to push the movable frame down. When the movable frame moves, it drives the limit sleeve to slide on the limit rod for limiting. After the movable frame descends, the annular float can be pulled into the transformer oil, and then the movable ring can be driven to move downward. The movement of the movable ring drives the fixed sleeve to slide on the positioning rod for limiting, so that the ball on the fixed rod can be moved downward. Several arc plates rotate downward under the action of gravity, and the ring The transformer oil leaked from the groove can be added to the inside of the oil storage tank under the guidance of the arc plate. After the rotating rod continues to drive the cam, the annular float can move upward under the action of buoyancy, so that the movable ring moves upward, and then the arc plate rotates upward, so that several arc plates can rotate back and forth, and then when the transformer oil is added through the arc plate, the reciprocating movement of the arc plate can increase the adding range of the transformer oil, so that the heated transformer oil can be evenly added to the inside of the oil storage tank, avoiding untimely stirring resulting in the transformer oil after heating and the transformer oil inside the oil storage tank cannot be evenly mixed, avoiding affecting the reading of the temperature sensor, and avoiding affecting the accuracy of the test;

3. When the bushing body is subjected to a temperature rise test, the bushing body is passed through the through slot on the oil storage tank so that one end of the bushing body is immersed in the transformer oil. Then, the knob is turned to drive the screw to rotate on the mounting frame, so that the screw can be driven to move. After the screw moves, the connecting block can be driven to move. After the connecting block moves, the connecting rod can be pulled to rotate. After the connecting rod rotates, the movable rod can be pushed to slide on the positioning frame, so that the two arc sleeves are close to each other, so that the two arc sleeves can fit closely with the bushing body, so that the bushing body can be fixed, thereby facilitating the user to fix the bushing body and avoiding displacement of the bushing body during the test.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the main cross-sectional structure of the present invention;

FIG2 is a schematic diagram of the three-dimensional structure of the housing of the present invention;

FIG3 is a schematic diagram of the enlarged structure of the A area in FIG1 of the present invention;

FIG4 is a schematic diagram of the enlarged structure of the B area in FIG1 of the present invention;

FIG5 is a schematic diagram of a three-dimensional cross-sectional structure of a fixing ring of the present invention;

FIG6 is a schematic diagram of a cross-sectional structure of a fixing ring of the present invention from another perspective;

FIG7 is a schematic diagram of the enlarged structure of the C area in FIG5 of the present invention;

FIG8 is a schematic diagram of a three-dimensional structure of a movable frame of the present invention;

FIG. 9 is a schematic diagram of the top view of the fixing assembly of the present invention.

In the figure: 1, oil storage tank; 101, casing body; 102, mounting plate; 103, pump body; 104, heater; 105, oil pumping pipe; 106, oil delivery pipe; 2, rotating assembly; 201, housing; 202, rotating shaft; 203, rotating plate; 204, supporting frame; 205, rotating rod; 206, fixing frame; 207, first bevel gear; 208, second bevel gear; 209, rotating rod; 210, rotating blade; 211, third bevel gear; 212, fourth bevel gear; 213, limiting frame; 214, fixing ring; 215, annular Groove; 216, arc plate; 217, movable ring; 218, fixed rod; 219, ball; 220, fixed block; 221, positioning rod; 222, fixed sleeve; 223, cam; 224, movable frame; 225, limit sleeve; 226, limit rod; 227, mounting block; 228, connecting rope; 229, annular buoy; 3, fixing assembly; 301, through groove; 302, positioning frame; 303, movable rod; 3031, arc sleeve; 304, mounting frame; 305, screw; 306, knob; 307, connecting block; 308, connecting rod.

DETAILED DESCRIPTION

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.

Please refer to Figures 1-9. The present invention provides a technical solution: a temperature rise test tool for casing, comprising an oil storage tank 1 and a casing body 101, a mounting plate 102 is provided on one side of the oil storage tank 1, and a pump body 103 is fixedly installed on one side of the top of the mounting plate 102, and a heater 104 is fixedly installed above the mounting plate 102, and an oil pumping pipe 105 is penetrated and connected to one end of the pump body 103, and the other end of the pump body 103 is penetrated and connected to the heater 104 through a pipeline, and an oil delivery pipe 106 is penetrated and connected to one end of the heater 104, and the oil delivery pipe 106 is penetrated and connected to the oil storage tank 1, and a temperature sensor is provided on one side of the inside of the oil storage tank 1;

Also includes:

The rotating assembly 2 is arranged inside and outside the oil storage tank 1;

The housing 201 is connected to one end of the oil extraction pipe 105, and one end of the housing 201 is connected to the oil storage tank 1 through a pipeline, and the interior of the housing 201 is rotatably connected to a rotating shaft 202, and a plurality of rotating plates 203 are fixedly installed on the outside of the rotating shaft 202, and one end of the rotating shaft 202 passes through the housing 201 and is symmetrically rotatably connected to a support frame 204 on the outside, and the two support frames 204 are fixedly connected to the oil storage tank 1;

A rotating rod 205 is rotatably connected to the lower part of the inner part of the oil storage tank 1. One end of the rotating rod 205 passes through the oil storage tank 1 and is rotatably connected to a fixing frame 206 on the outside. The fixing frame 206 is fixedly connected to the upper support frame 204. A first bevel gear 207 is fixedly installed on the top of the rotating shaft 202. At the same time, a second bevel gear 208 is fixedly installed on one end of the rotating rod 205. The first bevel gear 207 is meshedly connected with the second bevel gear 208.

The rotating rod 209 is rotatably connected to the inner bottom end of the oil storage tank 1, and a fourth bevel gear 212 is fixedly installed on the top of the rotating rod 209, and a third bevel gear 211 is fixedly installed on one end of the rotating rod 205 outside close to the fourth bevel gear 212, and the third bevel gear 211 is meshingly connected with the fourth bevel gear 212, and at the same time, one side of the rotating rod 205 outside close to the third bevel gear 211 and one side of the rotating rod 209 outside close to the fourth bevel gear 212 are rotatably connected to a limiting frame 213, and two groups of rotating blades 210 are symmetrically installed on the outside of the rotating rod 209.

Embodiment 1: As shown in FIGS. 1-4, a rotating assembly 2 is provided inside and outside the oil storage tank 1. The oil is pumped from the shell 201 through the pumping pipe 105, so that the transformer oil inside the oil storage tank 1 can enter the pump body 103 through the shell 201, and then heated by the heater 104, so that the heated transformer oil enters the oil storage tank 1 through the oil delivery pipe 106. When the transformer oil passes through the shell 201, it can impact the rotating plate 203, so that the rotating shaft 202 can be driven to rotate. After the rotating shaft 202 rotates, it passes through the first bevel gear The meshing of the wheel 207 and the second bevel gear 208 drives the rotating rod 205 to rotate. After the rotating rod 205 rotates, the third bevel gear 211 and the fourth bevel gear 212 are meshed to drive the rotating rod 209 to rotate, so that the rotating blade 210 rotates slowly, and the transformer oil inside the oil storage tank 1 can be slowly stirred to avoid the hot and cold stratification of the heated transformer oil after entering the oil storage tank and the transformer oil that has not been heated, avoid causing uneven internal oil temperature, avoid affecting the temperature sensor reading, and cause errors in subsequent tests, thereby improving the test accuracy.

A fixing ring 214 is fixedly installed on the upper part of the oil storage tank 1, and an annular groove 215 is formed through the top of the fixing ring 214, and a plurality of arc plates 216 are hingedly connected below the fixing ring 214 inside the oil storage tank 1, and a movable ring 217 is arranged below the plurality of arc plates 216, and a fixing rod 218 is fixedly installed on the top of the movable ring 217 located below the plurality of arc plates 216, and a ball 219 is hingedly connected to the top of the fixing rod 218, and the ball 219 is rotatably connected to the arc plate 216;

The outer side of the movable ring 217 is symmetrically mounted with a fixing sleeve 222, and the insides of the two fixing sleeves 222 are both slidably connected with a positioning rod 221, and the two ends of the positioning rod 221 are symmetrically mounted with a fixing block 220, and the fixing block 220 is fixedly connected to the oil storage tank 1;

Cams 223 are symmetrically mounted on the outside of the rotating rod 205, and movable frames 224 are arranged on the outsides of the two cams 223, and limit sleeves 225 are symmetrically mounted on both sides of the movable frames 224, and the limit sleeves 225 are slidably connected to the limit rods 226 inside, and mounting blocks 227 are symmetrically mounted on both ends of the limit rods 226, and the mounting blocks 227 are fixedly connected to the oil storage tank 1;

A connecting rope 228 is fixedly installed on the top of the two movable frames 224, and one end of the two connecting ropes 228 away from the movable frame 224 is fixedly connected to the movable ring 217;

An annular buoy 229 is fixedly mounted on the bottom of the movable ring 217 .

Embodiment 2: As shown in FIG. 1 and FIG. 5-8, the transformer oil after being heated flowing out of the oil delivery pipe 106 can enter the interior of the fixed ring 214 and leak out through the annular groove 215, so that the adding range of the transformer oil can be increased. The rotating rod 205 can drive the two cams 223 to rotate while rotating. After the cams 223 rotate, they can be connected with the sliding of the movable frame 224 to push the movable frame 224 down. When the movable frame 224 moves, it drives the limiting sleeve 225 to slide on the limiting rod 226 for limiting. After the movable frame 224 descends, it can pull the annular buoy 229 to immerse in the transformer oil, and then drive the movable ring 217 to move downward. The movable ring 217 moves and drives the fixed sleeve 222 to slide on the positioning rod 221 for limiting, so that the ball 219 on the fixed rod 218 can move downward. Several arc plates 216 rotate downward under the action of gravity, and the transformer oil leaked from the annular groove 215 can be added to the inside of the oil storage tank 1 under the guidance of the arc plate 216. After the rotating rod 205 continues to drive the cam 223, the annular float 229 can move upward under the action of buoyancy, so that the movable ring 217 moves upward, and then the arc plate 216 rotates upward, so that several arc plates 216 can rotate reciprocatingly, and then when the transformer oil is added through the arc plate 216, the reciprocating movement of the arc plate 216 can increase the adding range of the transformer oil, so that the heated transformer oil can be evenly added to the inside of the oil storage tank 1, avoiding the inability of the heated transformer oil to be evenly mixed with the transformer oil in the oil storage tank 1 due to untimely stirring, avoiding affecting the reading of the temperature measuring sensor, and avoiding affecting the accuracy of the test.

A fixing assembly 3 is arranged on the top of the oil storage tank 1;

The fixing assembly 3 includes a through slot 301 extending through the top of the oil storage tank 1, and positioning brackets 302 are symmetrically installed on both sides of the through slot 301 at the top of the oil storage tank 1, and movable rods 303 are slidably connected inside the two positioning brackets 302, and arc sleeves 3031 are fixedly installed at the ends of the two movable rods 303 that are close to each other;

A mounting bracket 304 is fixedly installed on one side of the through slot 301 at the top of the oil storage tank 1, and a screw rod 305 is connected to the internal thread of the mounting bracket 304, and a knob 306 is fixedly installed on one end of the screw rod 305, and a connecting block 307 is movably connected to the other end of the screw rod 305, and a connecting rod 308 is symmetrically hinged on one side of the connecting block 307, and two movable rods 303 are respectively fixed to one end of the two connecting rods 308 away from the connecting block 307 for hinged connection.

Embodiment 3: As shown in FIGS. 1 and 9 , when the bushing body 101 is subjected to a temperature rise test, the bushing body 101 is passed through the through slot 301 on the oil storage tank 1 so that one end of the bushing body 101 is immersed in the transformer oil. Then, the knob 306 is rotated to drive the screw rod 305 to rotate on the mounting bracket 304, so that the screw rod 305 can be driven to move. After the screw rod 305 moves, the connecting block 307 can be driven to move. After the connecting block 307 moves, the connecting rod 308 can be pulled to rotate. After the connecting rod 308 rotates, the movable rod 303 can be pushed to slide on the positioning bracket 302, so that the two arc sleeves 3031 are close to each other, so that the two arc sleeves 3031 can fit tightly with the bushing body 101, so that the bushing body 101 can be fixed, thereby facilitating the user to fix the bushing body 101 and avoiding displacement of the bushing body 101 during the test.

Working principle: When using the temperature rise test tool for bushing, first, as shown in 1-9, when the bushing body 101 is subjected to the temperature rise test, the bushing body 101 is passed through the through slot 301 on the oil storage tank 1, so that one end of the bushing body 101 is immersed in the transformer oil, and then the knob 306 is turned to drive the screw rod 305 to rotate on the mounting frame 304, so that the screw rod 305 can be driven to move, and after the screw 305 moves, the connecting block 307 can be driven to move, and after the connecting block 307 moves, the connecting rod 308 can be pulled to rotate, and after the connecting rod 308 rotates, the movable rod 303 can be pushed to slide on the positioning frame 302, so that the two arc sleeves 3031 are close to each other, so that the two arc sleeves 3031 can be closely fitted with the casing body 101, so that the casing body 101 can be fixed, and the shell 201 is pumped out through the oil extraction pipe 105, so that the transformer oil inside the oil storage tank 1 can enter the pump body 103 through the shell 201, and then heated by the heater 104, so that the heated transformer oil enters the oil storage tank 1 through the oil delivery pipe 106, and the transformer oil can impact the rotating plate 203 when passing through the shell 201, so that the rotating shaft 202 can be driven to rotate, and after the rotating shaft 202 rotates, the rotating rod 205 is driven to rotate through the meshing of the first bevel gear 207 and the second bevel gear 208, and after the rotating rod 205 rotates, it is meshed with the third bevel gear 211 and the rotating plate 203. The fourth bevel gear 212 is engaged to drive the rotating rod 209 to rotate, so that the rotating blade 210 rotates slowly, and the transformer oil after being heated flowing out of the oil delivery pipe 106 can enter the interior of the fixed ring 214 and leak out through the annular groove 215, so that the adding range of the transformer oil can be increased. The rotating rod 205 can drive the two cams 223 to rotate while rotating. After the cams 223 rotate, they can be connected with the sliding of the movable frame 224 to push the movable frame 224 down. When the movable frame 224 moves, it drives the limiting sleeve 225 to slide on the limiting rod 226 for limiting. After the movable frame 224 descends, it can pull the annular float 229 to immerse in the transformer oil, and then drive the movable ring 217 to move down. The movable ring 217 moves to drive the fixed sleeve 222 to slide on the positioning rod 221 for limiting, so that the ball 219 on the fixed rod 218 can move downward, and the plurality of arc plates 216 rotate downward under the action of gravity. The transformer oil leaked from the annular groove 215 can be added to the interior of the oil storage tank 1 under the guidance of the arc plate 216. After the rotating rod 205 continues to drive the cam 223, the annular float 229 can move upward under the action of buoyancy, so that the movable ring 217 moves upward, and then the arc plate 216 rotates upward, so that the plurality of arc plates 216 can rotate back and forth, and then when the transformer oil is added through the arc plate 216, the reciprocating movement of the arc plate 216 can increase the adding range of the transformer oil.

The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

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 (9)

1. The utility model provides a temperature rise test frock for sheathed tube, includes oil storage tank (1) and sleeve pipe body (101), one side of oil storage tank (1) is provided with mounting panel (102), just the top one side of mounting panel (102) is fixed mounting has pump body (103), and the top of mounting panel (102) is fixed mounting has heater (104), simultaneously the one end through-connection of pump body (103) has oil pumping pipe (105), and the other end of pump body (103) is through pipeline and heater (104) through-connection, just the one end through-connection of heater (104) has oil pipe (106) that send, and oil pipe (106) and oil storage tank (1) through-connection, simultaneously the inside one side of oil storage tank (1) is provided with temperature sensor;

characterized by further comprising:

The rotating assembly (2) is arranged inside and outside the oil storage tank (1);

The fixed component (3) is arranged at the top of the oil storage tank (1);

The oil storage device comprises a shell (201), a plurality of rotating plates (203) and a plurality of supporting frames (204), wherein the shell is connected to one end of an oil pumping pipe (105) in a penetrating mode, one end of the shell (201) is connected with an oil storage tank (1) in a penetrating mode through a pipeline, a rotating shaft (202) is connected to the interior of the shell (201) in a rotating mode, the plurality of rotating plates (203) are fixedly arranged on the exterior of the rotating shaft (202), meanwhile, one end of the rotating shaft (202) penetrates through the shell (201) and is symmetrically connected with the supporting frames (204) in a rotating mode on the exterior, and the two supporting frames (204) are fixedly connected with the oil storage tank (1);

The rotating rod (205) is rotatably connected to the lower part inside the oil storage tank (1), one end of the rotating rod (205) penetrates through the oil storage tank (1) and is externally rotatably connected with the fixing frame (206), the fixing frame (206) is fixedly connected with the upper supporting frame (204), the top end of the rotating shaft (202) is fixedly provided with the first bevel gear (207), meanwhile, one end of the rotating rod (205) is fixedly provided with the second bevel gear (208), and the first bevel gear (207) is meshed and connected with the second bevel gear (208);

Rotary rod (209), rotate and connect the inside bottom at oil storage tank (1), the top fixed mounting of rotary rod (209) has fourth bevel gear (212), just the one end fixed mounting that the outside of rotary rod (205) is close to fourth bevel gear (212) has third bevel gear (211), and third bevel gear (211) are connected with fourth bevel gear (212) meshing, simultaneously the one side that the outside of rotary rod (205) is close to third bevel gear (211) and the one side that the outside of rotary rod (209) is close to fourth bevel gear (212) rotate and are connected with spacing (213), moreover two sets of turning vane (210) are installed to the outside symmetry of rotary rod (209).

2. The heating test fixture for a sleeve according to claim 1, wherein: fixed ring (214) is fixedly installed above the inside of oil storage tank (1), annular groove (215) has been seted up in the top of fixed ring (214) run through, and the inside below that is located fixed ring (214) of oil storage tank (1) articulates there are a plurality of arc (216), simultaneously a plurality of the below of arc (216) is provided with expansion ring (217), simultaneously the top of expansion ring (217) is located the equal fixed mounting of below of a plurality of arc (216) and has dead lever (218), moreover the top of dead lever (218) articulates there is ball (219), moreover ball (219) are connected with arc (216) rotation.

3. The heating test fixture for a sleeve according to claim 2, wherein: the outside symmetry of expansion ring (217) is installed fixed cover (222), and two the inside of fixed cover (222) is all sliding connection has locating lever (221), and fixed block (220) are installed to the both ends symmetry of locating lever (221), simultaneously fixed block (220) and oil storage tank (1) fixed connection.

4. The heating test fixture for a sleeve according to claim 2, wherein: cam (223) are installed to the outside symmetry of dwang (205), and two the outside of cam (223) all is provided with movable frame (224), and stop collar (225) are installed to the bilateral symmetry of movable frame (224), simultaneously inside sliding connection of stop collar (225) has gag lever post (226), moreover installation piece (227) are installed to the both ends symmetry of gag lever post (226), moreover installation piece (227) and oil storage tank (1) fixed connection.

5. The heating test fixture for a sleeve according to claim 4, wherein: the tops of the two movable frames (224) are fixedly provided with connecting ropes (228), and one ends, far away from the movable frames (224), of the two connecting ropes (228) are fixedly connected with movable rings (217).

6. The heating test fixture for a sleeve according to claim 2, wherein: the bottom of the movable ring (217) is fixedly provided with an annular pontoon (229).

7. The heating test fixture for a sleeve according to claim 1, wherein: the fixed subassembly (3) is including running through the logical groove (301) of seting up at oil storage tank (1) top, just locating rack (302) are installed to the bilateral symmetry that the top of oil storage tank (1) is located logical groove (301), and two the inside of locating rack (302) is all sliding connection has movable rod (303), and two simultaneously the equal fixed mounting of one end that movable rod (303) is close to has arc cover (3031).

8. The heating test fixture for a sleeve according to claim 7, wherein: the top of oil storage tank (1) is located one side fixed mounting that leads to groove (301) has mounting bracket (304), just the inside threaded connection of mounting bracket (304) has screw rod (305), and the one end fixed mounting of screw rod (305) has knob (306), simultaneously the other end swing joint of screw rod (305) has connecting block (307), moreover one side symmetry of connecting block (307) articulates there is connecting rod (308), and two connecting rod (308) keep away from one end of connecting block (307) and fix two movable rod (303) articulated respectively.

9. A test method of a temperature rise test fixture for a sleeve, adopting a temperature rise test fixture for a sleeve according to any one of claims 1-8, the method comprising the steps of:

Step one:

When carrying out the heating test to sleeve pipe body (101), pass logical groove (301) on batch oil tank (1) with sleeve pipe body (101) for the one end of sleeve pipe body (101) is immersed in transformer oil, afterwards rotate knob (306) and drive screw rod (305) and rotate on mounting bracket (304), make can drive screw rod (305) and remove, screw rod (305) remove afterwards can drive connecting block (307) and remove, connecting block (307) remove afterwards can pull connecting rod (308) and rotate, connecting rod (308) rotate afterwards can promote movable rod (303) and slide on locating rack (302), make two arc cover (3031) be close to each other, make two arc cover (3031) can closely laminate with sleeve pipe body (101), make can fix sleeve pipe body (101), and then make the personnel fix sleeve pipe body (101), sleeve pipe body (101) shift when avoiding the test:

step two:

Starting pump body (103) after sleeve pipe body (101) is fixed for oil pumping is carried out to casing (201) through oil pumping pipe (105), make the inside transformer oil of oil storage tank (1) get into in pump body (103) through casing (201), afterwards, heat through heater (104), make the transformer oil after the heating get into in oil storage tank (1) through oil delivery pipe (106), transformer oil can strike rotor plate (203) when passing through casing (201), make can drive axis of rotation (202) and rotate, drive dwang (205) rotation through the meshing of first bevel gear (207) with second bevel gear (208) after axis of rotation (202) rotate, drive rotary rod (209) rotation through the meshing of third bevel gear (211) with fourth bevel gear (212) after rotation, make rotor blade (210) rotate slowly, can carry out slow stirring to the inside transformer oil of oil storage tank (1), transformer oil after avoiding after the heating gets into the oil storage tank with the transformer oil that does not heat appears layering, avoid causing inside oil temperature sensor reading to influence, cause follow-up test accuracy and test appearance.

Step three:

The transformer oil after the oil delivery pipe (106) flows out and heats can enter the inside of the fixed ring (214), the transformer oil leaks out through the annular groove (215), the adding range of the transformer oil can be lifted, the rotating rod (205) rotates and can drive the two cams (223) to rotate, the cams (223) can be connected with the sliding of the movable frame (224) to push the movable frame (224) to descend, the movable frame (224) moves and drives the stop collar (225) to slide on the stop rod (226) to limit, the movable frame (224) can pull the annular pontoon (229) to dip into the transformer oil after descending, the movable ring (217) can be driven to move downwards, the movable ring (217) can move to drive the fixed sleeve (222) to slide on the positioning rod (221) to limit, the balls (219) on the fixed rod (218) can move downwards, the plurality of arc plates (216) rotate downwards under the action of gravity, the transformer oil leaked out of the annular groove (215) can be fed into the inside of the oil storage tank (1) under the guidance of the arc plates (216), the rotating rod (205) can drive the annular pontoon (229) to move upwards, the movable ring (217) can be driven to move upwards, and the arc plates (216) can move upwards, and the movable ring (216) can move upwards, furthermore, the addition range of the transformer oil can be improved through the reciprocating movement of the arc plate (216) when the transformer oil is added through the arc plate (216), so that the transformer oil after heating can be uniformly added into the oil storage tank (1), the phenomenon that the transformer oil after heating cannot be uniformly mixed with the transformer oil in the oil storage tank (1) due to untimely stirring is avoided, the influence on the reading of a temperature measuring sensor is avoided, and the influence on the accuracy of a test is avoided.