A transformer fault monitoring device

Abstract

The present invention relates to the technical field of transformer fault monitoring, and specifically to a transformer fault monitoring device, comprising: a control mechanism, a linkage distance control mechanism, an insulation resistance monitoring mechanism, and a protective component for covering cables; the linkage distance control mechanism comprises a retractable support rod component; the insulation resistance monitoring mechanism comprises a pressure cover and a positioning component, and the positioning component can rotate relative to the pressure cover to clamp the cable portion to be tested; the protective component is used to wrap the cable portion to be tested; the linkage distance control mechanism is provided with a winding component to drive the positioning component to rotate relative to the pressure cover, thereby clamping or loosening the cable portion to be tested. By setting a traditional probe as an insulation resistance monitoring mechanism that is locked to the outside of the cable, the cable portion to be tested can be placed in an interference-free sealed monitoring environment through the protective component, thereby improving the accuracy of monitoring. The linkage distance control mechanism can realize the extension and retraction of the length, and the winding component can realize the opening and closing operations of the positioning component and the pressure cover.

Description

Technical Field

[0001] The invention relates to the technical field of transformer fault monitoring, and in particular to a transformer fault monitoring device. Background Art

[0002] At present, transformer maintenance is a key research object within the global economy. Since transformers bear the normal operation results of multiple devices, the technology of transformer maintenance is a problem worth exploring. Only by normal operation inspections and daily maintenance of transformers can we deal with emergency problems in time and make the transformer operate normally. Therefore, monitoring and troubleshooting of transformer faults are necessary measures to increase the service life of transformers.

[0003] Depending on the needs, the models of transformers are different. Different from the monitoring of ground-mounted transformers, the monitoring of transformers suspended outdoors is more difficult. Since outdoor overhead transformers are exposed to the external environment for a long time, in rainy seasons and when the temperature continues to rise, various surrounding factors will cause aging of the cables of outdoor transformers, which will then be broken down by the current. When the impurities floating in the humid air flow accumulate on the surface of the cable, the insulation performance of the cable insulation layer will be reduced, accelerating the aging and corrosion of the cable insulation layer, and in severe cases causing damage to the transformer.

[0004] In view of this, a transformer fault monitoring device is designed to facilitate fast and non-intrusive insulation resistance monitoring of outdoor overhead transformer cables. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] A transformer fault monitoring device comprises: a control mechanism, a linkage distance control mechanism arranged on the control mechanism, an insulation resistance monitoring mechanism arranged on the linkage distance control mechanism, and a protection component for covering a cable;

[0008] The control mechanism includes an insulated handle;

[0009] The linkage distance control mechanism comprises a retractable support rod assembly, the upper end of the support rod assembly is provided with a clamp, and the lower end of the support rod assembly is connected to the insulating handle;

[0010] The insulation resistance monitoring mechanism comprises a pressure-bearing cover movably mounted in the chuck, a positioning assembly arranged on the pressure-bearing cover, an electrode is arranged on the inner side of the pressure-bearing cover, the electrode is connected to a wire, the wire is used to connect to the megohmmeter, a soft rubber pad is arranged on one side of the positioning assembly and the pressure-bearing cover respectively, the positioning assembly can rotate relative to the pressure-bearing cover to clamp the cable to be tested, and the two soft rubber pads are used to seal and clamp the cable to be tested.

[0011] The protection assembly comprises a first bellows and a second bellows for wrapping the portion of the cable to be tested, the first bellows is connected to the pressure cover, and the second bellows is connected to the positioning assembly;

[0012] The linkage distance control mechanism is provided with a winding assembly, which includes a winding roller and a cable. One end of the cable is connected to the positioning assembly, and the other end is wound around the winding roller. The winding roller is used to retract and release the cable to drive the positioning assembly to rotate relative to the pressure cover, thereby clamping or releasing the cable to be tested.

[0013] In a preferred example, the present invention can be further configured as follows: the control mechanism also includes a clamp installed on the outside of the insulating handle, a spring arranged inside the clamp, an insert block movably installed inside the clamp, and a guide wheel movably installed inside the clamp, the outer periphery of the guide wheel is provided with an annular groove, one end of the insert block is provided with an arc groove corresponding to the annular groove, the wire is used to pass through the annular groove and the arc groove, and the spring is used to press the insert block tightly to clamp the wire in the annular groove and the arc groove.

[0014] In a preferred example, the present invention can be further configured as follows: the support rod assembly includes a first support assembly arranged on the insulating handle, a second support assembly arranged in the first support assembly, and a third support assembly arranged in the second support assembly; the chuck is arranged at the upper end of the third support assembly, and the winding assembly is arranged on the first support assembly.

[0015] In a preferred example, the present invention can be further configured as follows: the first support assembly includes a first support tube, a first bearing installed in the inner cavity of the first support tube, and a first beam shaft installed inside the first bearing, and the first support tube is installed on the insulating handle;

[0016] A first cylindrical end is installed at the top of the first beam shaft, and a first plug hole is opened inside the first beam shaft;

[0017] The second support assembly includes a second support tube movably installed inside the first support tube and a second beam shaft arranged in the inner cavity of the second support tube and inserted into the first beam shaft;

[0018] A second cylindrical end is installed on the top of the second beam shaft, and a second insertion hole is opened inside the second beam shaft, and the lower end of the second beam shaft is adapted to penetrate into the interior of the first beam shaft through the first insertion hole;

[0019] The third support assembly includes a third support tube movably mounted inside the second support tube, a second bearing mounted inside the third support tube, and a third beam shaft mounted inside the second bearing;

[0020] The lower end of the third beam shaft is adapted to penetrate into the interior of the second beam shaft through the second insertion hole, and the top end of the third beam shaft is provided with a third insertion hole;

[0021] The linkage distance control mechanism also includes an auxiliary rotation shaft arranged inside the chuck, the auxiliary rotation shaft includes a deflection gear, a guide rod and a cross-shaped end rod, the guide rod is rotatably connected to the chuck, the deflection gear is connected to the upper end of the guide rod, the cross-shaped end rod is arranged at the lower end of the guide rod, and the cross-shaped end rod is inserted into the third plug hole;

[0022] The insulation resistance monitoring mechanism also includes a driven gear mounted on the shaft rod at the bottom end of the pressure cover, and the driven gear is meshed with the deflection gear.

[0023] In a preferred example, the present invention can be further configured as follows: a motor and a battery are provided in the insulating handle, the battery is connected to the motor, the motor is connected to the first beam shaft, the motor is used to drive the first beam shaft to rotate, and then drive the second beam shaft and the third beam shaft to rotate, so as to drive the pressure cover to rotate relative to the chuck through the deflection gear and the driven gear.

[0024] In a preferred example, the present invention can be further configured as follows: the outer sides of the upper ends of the first support tube, the second support tube and the third support tube are respectively provided with anti-slip buckles, and the anti-slip buckles are provided with lead holes for the wires and the cables to pass through respectively.

[0025] In a preferred example, the present invention can be further configured as follows: the insulation resistance monitoring mechanism also includes two sets of limit clamps fixedly mounted on the pressure cover, and an adapter mounted on the electrode pole, one end of the wire is connected to the adapter, two anti-deflection baffles are provided on the outer side of the pressure cover, and the pull cable is arranged between the two anti-deflection baffles.

[0026] In a preferred example, the present invention can be further configured as follows: the positioning assembly includes a fixed cover;

[0027] One end of the fixed cover is hinged to one end of the pressure-bearing cover, and the other end is clamped to the other end of the pressure-bearing cover. The clamping end of the fixed cover is provided with two insertion holes, and two compression springs are arranged in the two insertion holes. One end of the two compression springs facing away from each other is respectively provided with a sliding ball. The clamping end of the fixed cover is provided with a clamping hole, and the sliding ball is clamped in the clamping hole under the elastic force of the compression spring;

[0028] A clamping seat is arranged on the outer side of the fixing cover, and the top end of the pulling cable is connected to the clamping seat.

[0029] In a preferred example, the present invention can be further configured as follows: the two soft rubber pads are overall trumpet-shaped after being buckled together.

[0030] In a preferred example, the present invention can be further configured as follows: the protective component also includes a first ring buckle and a second ring buckle, the outer ends of the first bellows and the second bellows are both provided with T-shaped ring buckles, and the two T-shaped ring buckles are respectively adapted to be clamped in the first ring buckle and the second ring buckle.

[0031] By adopting the above technical solution, the beneficial effects achieved by the present invention are:

[0032] 1. The present invention sets the traditional probe as an insulation resistance monitoring mechanism that is locked to the outside of the cable. Through the protective component, the cable part to be tested can be placed in an interference-free sealed monitoring environment. At this time, various parts of the cable can obtain selective insulation resistance testing, and the accuracy of monitoring is improved.

[0033] 2. The present invention can achieve extension and retraction of the length by setting a linkage distance control mechanism, and can realize the opening and closing operation of the positioning component and the pressure cover through the winding component, so that it is convenient to lock it to the outside of the cable during testing, thereby improving the stability during testing, and there is no need for manual holding of the insulating handle for a long time, which can effectively reduce labor intensity and improve work safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a transformer fault monitoring device provided by the present invention;

[0036] Figure 2 is a schematic diagram of a protective assembly of the present invention;

[0037] Figure 3 is a schematic diagram of the insulation resistance monitoring mechanism of the present invention;

[0038] Figure 4 It is a schematic diagram of the flipping of the positioning assembly of the present invention;

[0039] Figure 5 For the present invention Figure 4 The enlarged schematic diagram of point A in the middle;

[0040] Figure 6 is a schematic diagram of a pressure-bearing cover of the present invention;

[0041] Figure 7 is a schematic diagram of the control mechanism of the present invention;

[0042] Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point B in the middle;

[0043] Fig. 9 It is a stretching schematic diagram of the linkage distance control mechanism of the present invention;

[0044] Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of the center C;

[0045] Fig.11 For the present invention Fig. 9 The enlarged schematic diagram of point D in the middle;

[0046] Fig.12 It is a cross-sectional schematic diagram of three support pipes of the present invention;

[0047] Fig.13 is an enlarged schematic diagram of the third supporting assembly of the present invention;

[0048] Fig.14 It is a partial enlarged schematic diagram of the second supporting assembly and the third supporting assembly of the present invention;

[0049] Fig.15 It is a partial enlarged schematic diagram of the first supporting assembly and the second supporting assembly of the present invention;

[0050] Fig.16 It is an enlarged schematic diagram of the bottom of the first supporting assembly of the present invention.

[0051] Reference numerals:

[0052] 100, control mechanism; 110, insulating handle; 120, motor; 130, battery; 140, cover; 150, clamp; 160, spring; 170, plug; 180, guide wheel;

[0053] 200, linkage distance control mechanism; 210, first support assembly; 211, first support tube; 212, first bearing; 213, first beam shaft; 220, second support assembly; 221, second support tube; 222, second beam shaft; 230, third support assembly; 231, third support tube; 232, second bearing; 233, third beam shaft; 240, winding assembly; 241, lock; 242, winding roller; 243, cable; 244, rocker; 245, bolt; 250, chuck; 260, anti-slip buckle; 270, auxiliary rotation shaft;

[0054] 300, insulation resistance monitoring mechanism; 310, pressure-bearing cover; 320, electrode; 330, adapter; 340, wire; 350, limit clamp; 360, driven gear; 370, positioning assembly; 371, fixed cover; 372, compression spring; 373, sliding ball; 380, anti-deflection baffle; 390, soft rubber pad;

[0055] 400, protective component; 410, first bellows; 420, second bellows; 430, first ring buckle; 440, second ring buckle. DETAILED DESCRIPTION

[0056] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0057] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0058] A transformer fault monitoring device provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0059] Please refer to Figures 1 to 16 The present invention provides a transformer fault monitoring device, comprising a control mechanism 100, a linkage distance control mechanism 200 arranged on the control mechanism 100, an insulation resistance monitoring mechanism 300 arranged on the linkage distance control mechanism 200, and a protective component 400 for covering a cable.

[0060] The control mechanism 100 includes an insulating handle 110, a motor 120 installed inside the insulating handle 110, a battery 130 arranged inside the insulating handle 110, a cover 140 installed at the bottom of the insulating handle 110, a clamp 150 installed outside the insulating handle 110, a spring 160 arranged inside the clamp 150, an insert block 170 movably installed inside the clamp 150, and a guide wheel 180 movably installed inside the clamp 150, the outer periphery of the guide wheel 180 is provided with an annular groove, one end of the insert block 170 is provided with an arc groove corresponding to the annular groove, the wire 340 is used to pass through the annular groove and the arc groove, the spring 160 is used to press the insert block 170 tightly to clamp the wire 340 in the annular groove and the arc groove, and the insulating handle 110 is composed of a plastic outer cylinder and an insulating anti-slip sleeve; a hole is opened at the top of the transmission shaft in the motor 120;

[0061] The linkage distance control mechanism 200 includes a retractable support rod assembly, a chuck 250 is provided at the upper end of the support rod assembly, and the lower end of the support rod assembly is connected to the insulating handle 110; the support rod assembly includes a first support assembly 210 arranged on the insulating handle 110, a winding assembly 240 arranged on the first support assembly 210, a second support assembly 220 arranged in the first support assembly 210, and a third support assembly 230 arranged in the second support assembly 220, the chuck 250 is arranged at the upper end of the third support assembly 230, and the winding assembly 240 is arranged on the first support assembly 210;

[0062] The winding assembly 240 includes a winding roller 242 and a cable 243. One end of the cable 243 is connected to the positioning assembly 370, and the other end is wound around the winding roller 242. The winding roller 242 is used to retract and release the cable 243 to drive the positioning assembly 370 to rotate relative to the pressure cover 310, thereby clamping or releasing the cable to be tested. In addition, the winding assembly 240 also includes a lock 241, a rocker 244 and a bolt 245. The lock 241 is installed at the first On a support assembly 210, a winding roller 242 is installed on the inner side of the lock 241, a rocker 244 is connected to the winding roller 242, the rocker 244 is an L-shaped structure, and the inner end plate of the rocker 244 is detachably connected to the lock 241 through a bolt 245. When the bolt 245 is loosened, the rocker 244 is unlocked. When the rocker 244 is shaken, the rocker 244 can drive the winding roller 242 to rotate. When the bolt 245 is tightened, the rocker 244 is locked.

[0063] The insulation resistance monitoring mechanism 300 includes a pressure-bearing cover 310 movably mounted in the clamp 250, a positioning assembly 370 arranged on the pressure-bearing cover 310, and an electrode 320 installed on the inner side of the pressure-bearing cover 310. The electrode 320 is connected to a wire 340, and the wire 340 is used to connect to the megohmmeter. A soft rubber pad 390 is respectively provided on one side of the positioning assembly 370 and the pressure-bearing cover 310. The positioning assembly 370 can rotate relative to the pressure-bearing cover 310 to clamp the cable to be tested. The two soft rubber pads 390 are used to seal and clamp the cable to be tested. After the two soft rubber pads 390 are buckled, they are in a trumpet-shaped structure as a whole, and the soft rubber pads 390 are made of rubber material.

[0064] The insulation resistance monitoring mechanism 300 also includes two sets of limit clamps 350 fixedly mounted on the pressure cover 310, an adapter 330 mounted on the pole of the electrode 320, one end of the wire 340 is connected to the adapter 330, two anti-deflection baffles 380 are arranged on the outer side of the pressure cover 310, and the cable 243 is arranged between the two anti-deflection baffles 380;

[0065] The protection assembly 400 includes a first bellows 410 and a second bellows 420 for wrapping the cable to be tested portion, the first bellows 410 is connected to the pressure cover 310, and the second bellows 420 is connected to the positioning assembly 370;

[0066] The protection component 400 further includes a first ring buckle 430 and a second ring buckle 440 . The outer ends of the first bellows 410 and the second bellows 420 are both provided with T-shaped ring buckles, and the two T-shaped ring buckles are respectively adapted to be snapped into the first ring buckle 430 and the second ring buckle 440 .

[0067] Due to the large differences in transformer models and powers, unlike transformers placed on the ground and installed indoors, transformers installed outdoors with supports will continue to heat up after being exposed to humid and high-temperature environments for a long time. Especially in high-temperature environments, the cable insulation layer will be attached by humid airflow and floating impurities when heated, and the cable insulation layer will age faster. As the cable aging accelerates, the high-voltage current will cause the cable insulation layer to be broken down. In this regard, the existing probe monitoring insulation resistance equipment will cause certain damage to the cable. At the same time, two people are required to hold and continue working until the end. Workers' long-term hand-raising work will cause arm soreness and other problems.

[0068] The present invention configures a traditional probe as an insulation resistance monitoring mechanism 300 that is locked to the outside of the cable. Through the protective component 400, the cable portion to be tested can be placed in an interference-free sealed monitoring environment. At this time, various portions of the cable can be selectively tested for insulation resistance, and the accuracy of monitoring is improved. By configuring the linkage distance control mechanism 200, the length can be extended and retracted, and the positioning component 370 and the pressure cover 310 can be opened and closed through the winding component 240, so that it is easy to lock it to the outside of the cable during testing, thereby improving the stability during testing, and there is no need for manual holding of the insulating handle 110 for a long time, which can effectively reduce labor intensity and improve work safety.

[0069] When it is necessary to selectively monitor various parts of the cable, the worker needs to control the two sets of monitoring devices to be locked on the cable, wherein the two ends of the first bellows 410 and the second bellows 420 need to be connected to the pressure-bearing cover 310 and the positioning assembly 370 of the two sets of monitoring devices respectively. The worker can control the distance between the two insulating handles 110 to adjust the length of the first bellows 410 and the second bellows 420, thereby controlling the length of the cable part to be tested;

[0070] When the monitoring is completed, the worker only needs to control the rocker 244 to rotate clockwise until the winding roller 242 continuously winds and tightens the cable 243. Finally, the cable 243 can pull the positioning assembly 370 to flip upward, and the second bellows 420 will also unfold together with the fixed cover 371. At this time, the positioning assembly 370 can be quickly detached from the cable.

[0071] In some embodiments, the first support assembly 210 includes a first support tube 211, a first bearing 212 installed in the inner cavity of the first support tube 211, and a first beam shaft 213 installed inside the first bearing 212; the top of the first beam shaft 213 is installed with a first cylindrical end, and the first beam shaft 213 is provided with a first plug hole; the second support assembly 220 includes a second support tube 221 movably installed inside the first support tube 211 and a second beam shaft 222 arranged in the inner cavity of the second support tube 221 and plugged into the first beam shaft 213; the top of the second beam shaft 222 A second cylindrical end is installed, and a second socket is opened inside the second beam shaft 222, and the lower end of the second beam shaft 222 is adapted to penetrate into the interior of the first beam shaft 213 through the first socket; the third support assembly 230 includes a third support tube 231 movably installed inside the second support tube 221, a second bearing 232 installed inside the third support tube 231, and a third beam shaft 233 installed inside the second bearing 232; the lower end of the third beam shaft 233 is adapted to penetrate into the interior of the second beam shaft 222 through the second socket, and a third socket is opened at the top of the third beam shaft 233.

[0072] The linkage distance control mechanism 200 also includes an auxiliary rotation shaft 270 arranged inside the chuck 250, the auxiliary rotation shaft 270 includes a deflection gear, a guide rod and a cross-shaped end rod, the guide rod is rotatably connected in the chuck, the deflection gear is connected to the upper end of the guide rod, the cross-shaped end rod is arranged at the lower end of the guide rod, and the cross-shaped end rod is inserted into the third socket; the insulation resistance monitoring mechanism 300 also includes a driven gear 360 installed on the shaft at the bottom end of the pressure cover 310, and the driven gear 360 is meshed with the deflection gear.

[0073] A motor 120 and a battery 130 are provided in the insulating handle 110. The battery 130 is connected to the motor 120. The motor 120 is connected to the first beam shaft 213. The motor 120 is used to drive the first beam shaft 213 to rotate, thereby driving the second beam shaft 222 and the third beam shaft 233 to rotate, so as to drive the pressure cover 310 to rotate relative to the chuck 250 through the deflection gear and the driven gear 360.

[0074] During use, the third support assembly 230 is stretched outward from the second support assembly 220, and the second support assembly 220 is stretched outward from the first support assembly 210. The first support assembly 210, the second support assembly 220 and the third support assembly 230 in the extended state can be adapted according to the overhead transformers at different heights outdoors. After the pressure cover 310 and the positioning assembly 370 are locked on the outside of the cable, the motor 120 can be started according to the state of the cable on the transformer. With the high-speed rotation of the transmission shaft in the motor 120, the three beam shafts that are actively driven can be driven, and finally the auxiliary shaft 270 will be driven. Under the transmission action of the deflection gear and the driven gear, the insulation resistance monitoring mechanism 300 locked on the cable can perform a pitch movement relative to the clamp 250 as a whole. When the motor 120 stops, the driven gear 360 can be locked by the deflection gear to avoid the problem of arbitrary rotation.

[0075] In some embodiments, the linkage distance control mechanism 200 further includes three anti-slip buckles 260 and an auxiliary rotation shaft 270 disposed inside the chuck 250, the auxiliary rotation shaft 270 includes a deflection gear, a guide rod and a cross-shaped end rod, the guide rod is rotatably connected to the chuck, the deflection gear is connected to the upper end of the guide rod, the cross-shaped end rod is disposed at the lower end of the guide rod, and the cross-shaped end rod is inserted into the third plug hole;

[0076] The anti-slip buckle 260 is made of polyethylene, and a lead hole is opened inside the anti-slip buckle 260. Specifically, there are two lead holes, one for the cable to pass through, and the other for the wire to pass through;

[0077] The three anti-slip buckles 260 are used to restrict the release path of the wire 340, and the wire 340 is inserted into the gap between the plug block 170 and the inner side of the guide wheel 180, and the plug block 170 stretched outward by the elastic pressure presses the stretched wire 340;

[0078] The auxiliary rotation shaft 270 is composed of a deflection gear, a guide rod and a cross-shaped end rod.

[0079] The three anti-slip buckles 260 are respectively fixedly installed on the top of the first support tube 211, the second support tube 221 and the third support tube 231. At this time, the three anti-slip buckles 260 can provide anti-deviation protection for the wire 340 in a vertically distributed state. When the bottom end of the wire 340 is inserted along the gap between the plug block 170 and the guide wheel 180, when the bottom end of the wire 340 is connected to the megohmmeter, the wire 340 in a taut state can be quickly compressed by the plug block 170. At this time, the device in a suspended state can prevent the wire 340 from loosening and shaking.

[0080] In some embodiments, the positioning assembly 370 also includes a fixed cover 371, one end of the fixed cover 371 is hinged to one end of the pressure cover 310, and the other end is clamped to the other end of the pressure cover 310, the clamping end of the fixed cover 371 is provided with two sockets, and two compression springs 372 are provided in the two sockets, and a sliding ball 373 is respectively provided at one end of the two compression springs 372 that are opposite to each other, and a clamping hole is provided on the clamping end of the fixed cover 371, and the sliding ball 373 is clamped in the clamping hole under the elastic force of the compression spring; a clamping seat is provided on the outer side of the fixed cover 371, and the top of the cable 243 is connected to the clamping seat.

[0081] When in use, the worker needs to hold the insulating handle 110 and throw the pressure cover 310 and the fixed cover 371 toward the cable, and then relax the rope 243. At this time, the fixed cover 371 that is subjected to force toward the cable will be quickly locked on the outside, and the two sliding balls 373 squeezed outward by the two compression springs 372 will be quickly snapped into the grooves on the inner side of the pressure cover 310. At this time, the electrode 320 will be compressed and pressed tightly against the insulation layer of the cable, and the two soft rubber pads 390 installed on the outside of the pressure cover 310 and the fixed cover 371 can seal and wrap the cable, and the first corrugated tube 410 and the second corrugated tube 420 that are symmetrically distributed and stretched to the selected length can seal and wrap the part of the cable to be tested, thereby effectively ensuring that the wrapped part of the cable is accurately and undisturbed by insulation resistance monitoring.

[0082] The working principle and use process of the present invention: According to different geographical environments, most transformers installed outdoors are exposed to the outside. Since the transformers are disturbed by factors such as rain, temperature, wind and sand for a long time outdoors, accompanied by the high voltage output by the transformer, the insulation layer of the cable connected to the transformer and used to transfer current is prone to aging due to temperature rise, and then will be broken down by the current, and outdoor transformers are often installed on specific supports.

[0083] Therefore, when monitoring the insulation resistance of an outdoor overhead transformer, the worker needs to loosen the bolt 245, and then control the rocker 244 to rotate clockwise until the winding roller 242 rotates clockwise and continuously winds the cable 243. At the same time, the fixed cover 371 can be stretched outward by the taut cable 243, and the fixed cover 371 can be flipped upward along the top of the pressure cover 310. At this time, the first bellows 410 and the second bellows 420 respectively installed on the outside of the pressure cover 310 and the fixed cover 371 can be flipped at the same time. At the same time, another set of devices is adjusted in the above manner, and the first ring buckle 430 and the second ring buckle 440 installed on the other pressure cover 310 and the fixed cover 371 will also be flipped open.

[0084] Then the workers need to clamp the first ring buckle 430 and the second ring buckle 440 on the ends of the first corrugated tube 410 and the second corrugated tube 420 respectively. Then two workers need to hold two sets of the device respectively and deliver the two sets of insulation resistance monitoring mechanisms 300 to the position of the cable to be tested of the overhead transformer until the two pressure-bearing covers 310 are respectively attached to one side of the cable. Then, according to the distance between the cables to be tested, the two workers need to hold the two sets of devices and stretch them outward along the cables until the first corrugated tube 410 and the second corrugated tube 420 are uniformly expanded. Then the workers need to relax the cable 243. And control the two groups of devices to be thrown along the outside of the cable. At this time, the fixed cover 371 is forced to flip downward quickly until the outer end of the fixed cover 371 is clamped in the pressure cover 310. At this time, the first bellows 410 and the second bellows 420 will also be covered on the outside of the cable, and the two electrodes 320 respectively arranged on the inner sides of the two pressure covers 310 will be pressed against the outside of the cable. At the same time, the two groups of soft rubber pads 390 serve as sealing structures for the outer ends of the two groups of pressure covers 310 and the fixed cover 371. Therefore, the protected part of the cable can be safely monitored without interference from external factors.

[0085] The above steps are implemented when the outdoor overhead transformer is powered off. When the above steps are completed, the bottom lines of the two wires 340 can be inserted along the gap between the guide wheel 180 and the plug block 170, and the wires 340 can be straightened. At this time, the straightened wires 340 can be locked and fixed by the plug block 170, and then the terminal ends of the two wires 340 are connected to the two poles of the megohmmeter.

[0086] Before measuring, the megohmmeter should be calibrated in an open circuit. When the "L" and "E" ends of the megohmmeter are unloaded, the pointer of the megohmmeter should point to the "maximum value"; when the "L" and "E" ends of the megohmmeter are short-circuited, the pointer of the megohmmeter should point to "0", indicating that the megohmmeter is functioning well and can be used at this time;

[0087] When measuring, the speed of shaking the handle of the shaker should be uniformly 120 revolutions per minute. After maintaining a stable speed for 1 minute, take the reading to avoid the influence of absorbed current. During this period, workers must not touch the two wires 340 and any connected lines.

[0088] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0089] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0090] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above is a detailed introduction to a transformer fault monitoring device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A transformer fault monitoring device, characterized in that: include: A control mechanism (100), a linkage distance control mechanism (200) arranged on the control mechanism (100), an insulation resistance monitoring mechanism (300) arranged on the linkage distance control mechanism (200), and a protection component (400) for covering a cable; The control mechanism (100) comprises an insulating handle (110); The linkage distance control mechanism (200) comprises a retractable support rod assembly, the upper end of the support rod assembly is provided with a clamp (250), and the lower end of the support rod assembly is connected to the insulating handle (110); The insulation resistance monitoring mechanism (300) comprises a pressure-bearing cover (310) movably mounted in the clamp (250), and a positioning assembly (370) arranged on the pressure-bearing cover (310); an electrode (320) is arranged on the inner side of the pressure-bearing cover (310); the electrode (320) is connected to a wire (340); the wire (340) is used to connect to an ohmmeter; a soft rubber pad (390) is respectively arranged on one side of the positioning assembly (370) and the pressure-bearing cover (310); the positioning assembly (370) can rotate relative to the pressure-bearing cover (310) to clamp a portion of the cable to be tested; and the two soft rubber pads (390) are used to seal and clamp the portion of the cable to be tested; The protection component (400) comprises a first corrugated tube (410) and a second corrugated tube (420) for wrapping a portion of the cable to be tested, the first corrugated tube (410) being connected to the pressure-bearing cover (310), and the second corrugated tube (420) being connected to the positioning component (370); The linkage distance control mechanism (200) is provided with a winding assembly (240), the winding assembly (240) comprising a winding roller (242) and a cable (243), one end of the cable (243) being connected to the positioning assembly (370), and the other end of the cable being wound around the winding roller (242), the winding roller (242) being used to wind up and release the cable (243) to drive the positioning assembly (370) to rotate relative to the pressure cover (310), thereby clamping or releasing a portion of the cable to be tested.

2. A transformer fault monitoring device according to claim 1, characterized in that: The control mechanism (100) further comprises a clamp (150) mounted on the outside of the insulating handle (110), a spring (160) arranged inside the clamp (150), an insert block (170) movably mounted inside the clamp (150), and a guide wheel (180) movably mounted inside the clamp (150), wherein an annular groove is provided on the outer periphery of the guide wheel (180), an arc groove corresponding to the annular groove is provided on one end of the insert block (170), the wire (340) is used to pass through the annular groove and the arc groove, and the spring (160) is used to press the insert block (170) tightly so as to clamp the wire (340) in the annular groove and the arc groove.

3. A transformer fault monitoring device according to claim 1, characterized in that: The support rod assembly comprises a first support assembly (210) arranged on the insulating handle (110), a second support assembly (220) arranged in the first support assembly (210), and a third support assembly (230) arranged in the second support assembly (220); the chuck (250) is arranged at the upper end of the third support assembly (230), and the winding assembly (240) is arranged on the first support assembly (210).

4. A transformer fault monitoring device according to claim 3, characterized in that: The first support assembly (210) comprises a first support tube (211), a first bearing (212) installed in an inner cavity of the first support tube (211), and a first beam shaft (213) installed inside the first bearing (212); the first support tube (211) is installed on the insulating handle (110); A first cylindrical end is installed at the top end of the first beam shaft (213), and a first plug hole is opened inside the first beam shaft (213); The second support assembly (220) comprises a second support tube (221) movably mounted inside the first support tube (211), and a second beam shaft (222) disposed in the inner cavity of the second support tube (221) and plugged into the first beam shaft (213); A second cylindrical end is installed on the top of the second beam shaft (222), and a second insertion hole is opened inside the second beam shaft (222), and the lower end of the second beam shaft (222) is adapted to penetrate into the interior of the first beam shaft (213) through the first insertion hole; The third support assembly (230) comprises a third support tube (231) movably mounted inside the second support tube (221), a second bearing (232) mounted inside the third support tube (231), and a third beam shaft (233) mounted inside the second bearing (232); The lower end of the third beam shaft (233) is adapted to penetrate into the interior of the second beam shaft (222) through the second insertion hole, and a third insertion hole is provided at the top end of the third beam shaft (233); The linkage distance control mechanism (200) further comprises an auxiliary rotation shaft (270) arranged inside the chuck (250), the auxiliary rotation shaft (270) comprising a deflection gear, a guide rod and a cross-shaped end rod, the guide rod is rotatably connected inside the chuck, the deflection gear is connected to the upper end of the guide rod, the cross-shaped end rod is arranged at the lower end of the guide rod, and the cross-shaped end rod is inserted into the third insertion hole; The insulation resistance monitoring mechanism (300) further comprises a driven gear (360) mounted on a shaft rod at the bottom end of the pressure-bearing cover (310), the driven gear (360) being meshed with the deflection gear.

5. A transformer fault monitoring device according to claim 4, characterized in that: A motor (120) and a battery (130) are provided in the insulating handle (110); the battery (130) is connected to the motor (120); the motor (120) is connected to the first beam shaft (213); the motor (120) is used to drive the first beam shaft (213) to rotate, thereby driving the second beam shaft (222) and the third beam shaft (233) to rotate, so as to drive the pressure cover (310) to rotate relative to the chuck (250) via the deflection gear and the driven gear (360).

6. A transformer fault monitoring device according to claim 4, characterized in that: Anti-slip buckles (260) are respectively provided on the outer sides of the upper ends of the first support tube (211), the second support tube (221) and the third support tube (231), and the anti-slip buckles (260) are respectively provided with lead holes for the wire (340) and the cable (243) to pass through.

7. A transformer fault monitoring device according to claim 1, characterized in that: The insulation resistance monitoring mechanism (300) further comprises two sets of limit clamps (350) fixedly mounted on the pressure-bearing cover (310), and an adapter (330) mounted on a pole of the electrode (320); one end of the wire (340) is connected to the adapter (330); two anti-deflection baffles (380) are provided on the outer side of the pressure-bearing cover (310); and the pull cable (243) is arranged between the two anti-deflection baffles (380).

8. A transformer fault monitoring device according to claim 1, characterized in that: The positioning assembly (370) comprises a fixing cover (371); One end of the fixed cover (371) is hinged to one end of the pressure-bearing cover (310), and the other end is clamped to the other end of the pressure-bearing cover (310); the clamping end of the fixed cover (371) is provided with two insertion holes, and two compression springs (372) are arranged in the two insertion holes; a sliding ball (373) is respectively arranged at one end of the two compression springs (372) which are away from each other; a clamping hole is provided on the clamping end of the fixed cover (371); the sliding ball (373) is clamped in the clamping hole under the elastic force of the compression spring; A clamping seat is provided on the outer side of the fixing cover (371), and the top end of the pull cable (243) is connected to the clamping seat.

9. A transformer fault monitoring device according to claim 1, characterized in that: After being buckled together, the two soft rubber pads (390) form a trumpet-shaped structure as a whole.

10. A transformer fault monitoring device according to claim 1, characterized in that: The protection assembly (400) further comprises a first ring buckle (430) and a second ring buckle (440), the outer ends of the first bellows (410) and the second bellows (420) are both provided with T-shaped ring buckles, and the two T-shaped ring buckles are respectively adapted to be snap-fitted into the first ring buckle (430) and the second ring buckle (440).

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