CN118016426A

CN118016426A - Dry-type transformer

Info

Publication number: CN118016426A
Application number: CN202410404288.2A
Authority: CN
Inventors: 周明文
Original assignee: Jiangxi Guoxiang Electric Power Equipment Co ltd
Current assignee: Jiangxi Guoxiang Electric Power Equipment Co ltd
Priority date: 2024-04-07
Filing date: 2024-04-07
Publication date: 2024-05-10
Anticipated expiration: 2044-04-07
Also published as: CN118016426B

Abstract

The application discloses a dry-type transformer, which belongs to the technical field of transformers and comprises a dry-type transformer main body, wherein a plurality of cylindrical windings are arranged on the dry-type transformer main body, and contact type measuring pieces are arranged on the surface of each cylindrical winding. The dry-type transformer is characterized in that the contact-type measuring part is glued on the cylindrical winding of the dry-type transformer main body, and the temperature of the surface of the cylindrical winding is physically sensed and monitored when the dry-type transformer main body is operated through the cooperation between the heat induction mechanism arranged inside the wall thickness of the flexible base and the heat conduction cylinder, so that the contact-type measuring part can isolate external moisture from the heat induction mechanism and the heat conduction cylinder through the barrier effect of the sealing ring and the flexible base when the dry-type transformer is used for measuring the temperature, the influence of the moisture nearby the reservoir on the temperature measuring effect of the contact-type measuring part is avoided, and the temperature measuring effect of the contact-type measuring part on the dry-type transformer is ensured.

Description

Dry-type transformer

Technical Field

The application relates to the technical field of transformers, in particular to a dry-type transformer.

Background

The cooling modes of the dry type transformer are classified into natural air cooling (AN) and forced air cooling (AF). In natural air cooling, the dry type transformer can continuously run for a long time under rated capacity. When forced air cooling is performed, the output capacity of the transformer can be improved by 50%, and the transformer is suitable for intermittent overload operation or emergency accident overload operation; the overload load loss and the impedance voltage increase are large in overload, and are in uneconomical operation states, so that the overload load is not continuously in overload operation for a long time.

Currently, when the dry type transformer operates, temperature signals at a cylindrical winding of the dry type transformer are measured by heat-sensitive temperature measuring electrical appliance elements such as an infrared thermometer, a temperature sensor and the like, and when the temperature of the cylindrical winding reaches 110 ℃, a system automatically starts a fan for cooling; when the winding temperature is low to 90 ℃, the fan is automatically stopped by the system, currently, in order to irrigate, flood control, power generation and other demands of a reservoir, in the construction of a small reservoir, a transformer is one of indispensable equipment, the transformer changes the voltage of a conveying line from high voltage to low voltage, so that the power supply equipment of the reservoir is used, however, due to the fact that the water surface area of the reservoir is large, when the humidity near the reservoir is large due to the increase of the evaporation capacity of the reservoir, moisture can easily pass through a radiating opening on a case of the dry-type transformer, the surface of a temperature measuring electrical element arranged on the dry-type transformer and a layer of water vapor film are covered on a conductive line, the signal output circuit of the temperature measuring electrical element can be influenced, signal resistance changes, and then the problems of circuit mismatch, parameter drift and the like of the temperature measuring electrical element are caused, the temperature measuring result of the dry-type transformer is inaccurate, the heat radiating effect of the dry-type transformer is influenced, moreover, the moisture can also cause corrosion damage to the temperature measuring electrical element, and even the connecting circuit of the temperature measuring electrical element can be caused to cause short-circuit danger, and the use safety of the dry-type transformer is influenced.

In view of this, we propose a dry-type transformer.

Disclosure of Invention

The technical problems to be solved are as follows: the application aims to provide a dry-type transformer, which solves the technical problems in the background art.

The technical scheme is as follows: the technical scheme of the application provides a dry-type transformer, which comprises a dry-type transformer main body, wherein a plurality of cylindrical windings are arranged on the dry-type transformer main body, the surface of each cylindrical winding is provided with a contact measuring piece, and a base of the dry-type transformer main body is connected with a heat dissipation fan at a position corresponding to each cylindrical winding; the contact type measuring piece comprises a flexible base, wherein high-temperature resistant adhesive layers are arranged on two sides of the surface of the flexible base, a release paper layer is covered on one side, far away from the flexible base, of the high-temperature resistant adhesive layers, a treatment bin and a heat insulation bin are arranged in the wall thickness of the flexible base, a heat insulation layer is covered on the inner wall of the heat insulation bin, an exhaust channel is further arranged in the flexible base, a heat induction mechanism is arranged in the treatment bin, a sealing ring and a heat conduction cylinder are respectively connected with one side, close to the high-temperature resistant adhesive layers, of the flexible base corresponding to the position of the treatment bin, the sealing ring is arranged on the periphery of the heat conduction cylinder, a feeding rod and a retracting rod are inserted in an opening, close to one end of the high-temperature resistant adhesive layers, in a sealing sliding manner, an elastic balloon filled with insulating oil is further arranged in the inner cavity of the heat conduction cylinder, and an indication structure is arranged on one side, far away from the high-temperature resistant adhesive layers, corresponding to the position of the treatment bin; the indication structure comprises a convex column, wherein a connecting channel is arranged in the convex column, two ends of the connecting channel penetrate through the side wall of the convex column, elastic telescopic units are arranged in openings at two ends of the connecting channel, a wireless signal transmitter and a hydraulic catheter are respectively connected in the convex column, and insulating oil is filled in the hydraulic catheter and the connecting channel; when the flexible base is glued and fixed on the surface of the cylindrical winding through the high-temperature resistant gluing layer, the advancing rod retreats into the inner cavity of the heat conduction cylinder and forces the elastic telescopic unit to extend out from the inside of the connecting channel.

As an alternative scheme of the technical scheme of the document, the thermal induction mechanism comprises a passive elastic film connected in the treatment bin and temperature-sensitive paraffin filled in one end of the inner cavity of the treatment bin, which is close to the high-temperature-resistant adhesive layer; the heat induction mechanism further comprises an approaching excitation seat and an excitation spring plate which are arranged in the heat insulation bin, wherein one end of the approaching excitation seat, which is far away from the excitation spring plate, is connected with an insulating push rod, and one end of the insulating push rod, which is far away from the approaching excitation seat, penetrates into the treatment bin and is connected with the outer wall of the passive elastic membrane.

As an alternative scheme of the technical scheme of the application, one end of the heat conduction cylinder stretches into the temperature sensing paraffin, and the other end of the heat conduction cylinder protrudes out of one surface of the high-temperature-resistant adhesive layer, which is far away from the flexible base.

As an alternative scheme of the technical scheme of the document, one end of the convex column extends outwards from one side of the flexible base away from the high-temperature-resistant adhesive layer, and the other end extends into the heat insulation bin to be connected with the excitation elastic sheet.

As an alternative scheme of the technical scheme of the application, one end of the hydraulic catheter is communicated with the middle part of the connecting channel, and the other end of the hydraulic catheter respectively passes through the passive elastic membrane and the end part of the heat conducting tube and is fixedly communicated with the top part of the elastic balloon.

As an alternative scheme of the technical scheme of the application, one end of the exhaust channel is communicated with one end of the heat insulation bin, which is far away from the high-temperature-resistant adhesive layer, and the other end of the exhaust channel penetrates through the side wall of the flexible base to be communicated with the atmosphere; the flexible base is also provided with a plurality of heat dissipation holes in a penetrating way.

As an alternative scheme of the technical scheme of the application, the elastic telescopic unit comprises a piston seat which is connected in a sealing and sliding manner in the connecting channel, one end of the piston seat is connected with a reflecting rod, the other end of the piston seat is connected with a traction arm rod, the periphery of the traction arm rod is sleeved with a return spring, the surface of the reflecting rod is provided with a reflecting layer, the traction arm rod is sleeved with a supporting frame which is fixed in the connecting channel, and the return spring is connected between the piston seat and the supporting frame; one end of the traction arm rod, which is far away from the piston seat, is connected with an opposite-end trigger terminal.

As an alternative to the technical solution of the present application, when the two return springs are in the initial state, opposite ends of the two opposite-end trigger terminals are tightly attached together, and the reflective rod is located inside the connection channel.

As an alternative of the technical solution of the present application, when the excitation seat is approaching to move toward the excitation spring plate and contacts with the excitation spring plate, the heat dissipation fan connected to the base of the dry-type transformer main body and corresponding to the position of the cylindrical winding on the dry-type transformer main body is triggered to be turned on.

As an alternative to the technical solution of the present application, when two opposite trigger terminals are in contact, the wireless signal transmitter is triggered to send out a prompt signal.

The beneficial effects are that: one or more technical schemes provided in the technical scheme of the application at least have the following technical effects or advantages: 1. the dry-type transformer is characterized in that the contact-type measuring part is glued on the cylindrical winding of the dry-type transformer main body, and the temperature of the surface of the cylindrical winding is physically sensed and monitored when the dry-type transformer main body is operated through the cooperation between the heat induction mechanism arranged inside the wall thickness of the flexible base and the heat conduction cylinder, so that the contact-type measuring part can isolate external moisture from the heat induction mechanism and the heat conduction cylinder through the barrier effect of the sealing ring and the flexible base when the dry-type transformer is used for measuring the temperature, the influence of the moisture nearby the reservoir on the temperature measuring effect of the contact-type measuring part is avoided, and the temperature measuring effect of the contact-type measuring part on the dry-type transformer is ensured.

2. After the release paper layer on the contact type measuring part is torn off from the surface of the high-temperature-resistant adhesive layer, one of the high-temperature-resistant adhesive layers is adhered and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body, then the other high-temperature-resistant adhesive layer is adhered and fixed on the surface of the cylindrical winding to be measured after the flexible base is tensioned, and at the moment, the heat conducting cylinder and the elastic sealing ring are tightly attached to the surface of the cylindrical winding, so that a worker can conveniently and rapidly install and fix the contact type measuring part for carrying out physical sensing monitoring on the temperature of the surface of the cylindrical winding to be measured when the dry type transformer main body operates.

3. Because the end of the heat conduction barrel protrudes out of the surface of the flexible base, when the contact type measuring piece is glued and fixed on the cylindrical winding to be measured on the dry type transformer main body, and after the dry type transformer main body operates, heat energy generated by the cylindrical winding to be measured is transferred to the temperature sensing paraffin through the heat conduction barrel, when the surface temperature of the winding reaches a set critical value (namely, the phase change temperature point of the temperature sensing paraffin), the volume of the temperature sensing paraffin rapidly expands and drives the approaching excitation seat to contact with the excitation spring plate, after the approaching excitation seat contacts with the excitation spring plate, a heat radiation fan connected to the base of the dry type transformer main body and corresponding to the position of the cylindrical winding on the dry type transformer main body is triggered, the dry type transformer is cooled timely, heat energy generated when the approaching excitation seat contacts with the excitation spring plate is isolated through a heat insulation layer arranged on the inner wall of the heat insulation bin, and the heat energy generated when the approaching excitation seat contacts with the excitation spring plate is prevented from being transferred to the temperature sensing paraffin, and the accuracy of temperature measurement of the heat induction mechanism is affected.

4. The flexible base is a flexible Teflon film, has excellent high temperature resistance and insulating property, the high temperature resistance can reach 260 ℃, the high temperature resistant adhesive layer has good bonding effect, and the acrylic adhesive layer is resistant to 130-150 ℃ for a long time, so that the contact type measuring piece can be stably bonded and fixed on the surface of the cylindrical winding to be measured of the dry type transformer body when the dry type transformer body is in overload operation, the flexible base can not be damaged by the high temperature of the surface of the cylindrical winding, the working stability of the contact type measuring piece is improved, and the service life of the contact type measuring piece is prolonged.

5. Because the flexible base is flexible material, after the flexible base is fixed on the surface of the cylindrical winding to be tested on the dry-type transformer main body through the adhesion of the two high-temperature-resistant adhesive layers on the surface of the flexible base, the advancing and retreating rod retracted into the inner cavity of the heat conducting cylinder extrudes and pushes the insulating oil in the elastic balloon into the hydraulic guide tube, because the internal hydraulic pressure of the connecting channel is increased, the two reflecting rods extend out of the connecting channel to realize external information feedback, when a worker installs the contact type measuring piece, the fact that the two reflecting rods extend out of the connecting channel is observed, the fact that the end part of the heat conducting cylinder is tightly pressed on the surface of the cylindrical winding to be tested under the action of the tensioned flexible base can be rapidly deduced, so that when the contact type measuring piece senses the surface temperature of the cylindrical winding to be tested, the heat energy of the winding surface is stably transferred to the temperature-sensitive paraffin through the heat conducting cylinder, and the accuracy of the contact type measuring piece for stable sensing of the cylindrical winding to be tested on the dry-type transformer main body is ensured.

6. When the contact type measuring piece is glued and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body, the advancing and retreating rod continuously retracts into the inner cavity of the heat conduction cylinder and continuously pushes insulating oil in the elastic saccule into the hydraulic guide pipe, after the contact type measuring piece is glued and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body, due to the fact that the hydraulic pressure in the two connecting channels is increased, the two reflecting rods extend out of the connecting channels and enable the two opposite-end trigger terminals which are originally clung together to be separated, along with the increase of the service time of the contact type measuring piece glued and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body, when the contact type measuring piece is loosened, the convex column is pushed back into the inner cavity of the heat conduction cylinder again under the action of the elastic force of the reset spring, so that the two opposite-end trigger terminals are contacted again and trigger the wireless signal transmitter to send prompt signals to the outside of the external control terminal, and relevant workers are timely reminded of replacing the contact type measuring piece, so that in the dry type transformer main body is informed that when the contact type measuring piece is loosened, the dry type measuring piece is corresponding to the working personnel can first time, and the temperature of the dry type measuring piece is not influenced on the surface of the dry type transformer main body, and the function of the contact type transformer is not influenced by the normal to the temperature of the contact type transformer main body to be measured.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present application.

FIG. 2 is a schematic diagram of a contact probe according to the present application.

Fig. 3 is a side view of a contact probe according to the present application.

FIG. 4 is a schematic cross-sectional view of a contact probe according to the present application.

Fig. 5 is a schematic cross-sectional view of a stud according to the present application.

The reference numerals in the figures illustrate: 1. a dry-type transformer body; 2. a heat radiation fan; 301. a flexible base; 302. a convex column; 303. a high temperature resistant adhesive layer; 304. a piston seat; 305. a wireless signal transmitter; 306. a passive elastic membrane; 307. paraffin wax temperature sensing; 308. approaching the excitation seat; 309. exciting the spring plate; 310. a heat conduction tube; 311. feeding and withdrawing a rod; 312. an elastic balloon; 313. an opposite trigger terminal; 314. pulling the arm lever; 315. a hydraulic conduit; 316. a connection channel; 318. a heat insulating layer; 319. a return spring; 320. and a light reflecting rod.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to fall within the scope of the present application, based on the embodiments of the present application, which is further described in detail below with reference to the drawings.

Referring to fig. 1 to 4, an embodiment of the present application provides a dry-type transformer, including a dry-type transformer main body 1, a plurality of cylindrical windings are provided on the dry-type transformer main body 1, a contact measuring piece is provided on the surface of each cylindrical winding, and a heat dissipation fan 2 is connected to a position corresponding to each cylindrical winding on a base of the dry-type transformer main body 1; the contact type measuring part comprises a flexible base 301, wherein high temperature resistant adhesive layers 303 are arranged on two sides of the surface of the flexible base 301, a release paper layer is covered on one side of the high temperature resistant adhesive layers 303 away from the flexible base 301, the flexible base 301 is a flexible Teflon film, the high temperature resistant performance and the insulating performance are excellent, the high temperature resistant temperature of the flexible base 301 can reach 260 ℃, the high temperature resistant adhesive layers 303 are acrylic adhesive with good bonding effect and long-term temperature resistance of 130-150 ℃, so that the contact type measuring part can be stably bonded and fixed on the surface of a cylindrical winding to be measured of the dry type transformer main body 1 when the dry type transformer main body 1 is in overload operation, the flexible base 301 is not damaged by the high temperature of the surface of the cylindrical winding, the working stability of the contact type measuring part is improved, the service life of the contact type measuring part is prolonged, the flexible base 301 is internally provided with a treatment bin and a heat insulation bin, the inner wall of the heat insulation bin is covered with a heat insulation layer 318, the heat insulation layer 318 can be a layer of aerogel paint layer covered on the inner wall surface of the heat insulation bin, the flexible base 301 is internally provided with an exhaust channel, the treatment bin is internally provided with a heat induction mechanism, one side of the flexible base 301, which is close to the high temperature resistant adhesive layer 303, is correspondingly connected with a sealing ring and a heat conduction cylinder 310, the sealing ring is annularly arranged on the periphery of the heat conduction cylinder 310, a feeding rod 311 is hermetically and slidingly inserted into an opening of one end of the heat conduction cylinder 310, which is close to the high temperature resistant adhesive layer 303, an elastic balloon 312 filled with insulating oil is also arranged in an inner cavity of the heat conduction cylinder 310, and an indication structure is arranged at the position, corresponding to the treatment bin, of one side of the flexible base 301, which is far away from the high temperature resistant adhesive layer 303; the indication structure comprises a convex column 302, wherein a connecting channel 316 is arranged in the convex column 302, two ends of the connecting channel 316 penetrate through the side wall of the convex column 302, elastic telescopic units are arranged in openings at two ends of the connecting channel 316, a wireless signal transmitter 305 and a hydraulic guide tube 315 are respectively connected in the convex column 302, insulating oil, also called transformer oil, is filled in the hydraulic guide tube 315 and the connecting channel 316, and is a synthetic liquid insulating material; when the flexible base 301 is adhesively fixed on the surface of the cylindrical winding by the high temperature resistant adhesive layer 303, the advancing and retreating rod 311 retreats into the inner cavity of the heat conduction cylinder 310 and forces the elastic telescopic unit to extend out from the inside of the connecting channel 316. One end of the exhaust channel is communicated with one end of the heat insulation bin, which is far away from the high-temperature-resistant adhesive layer 303, and the other end of the exhaust channel penetrates through the side wall of the flexible base 301 to be communicated with the atmosphere; the flexible base 301 is further provided with a plurality of heat dissipation holes. The dry-type transformer performs physical sensing monitoring on the temperature of the surface of the cylindrical winding when the dry-type transformer body operates through the cooperation between the heat induction mechanism arranged inside the wall thickness of the flexible base 301 and the heat conduction cylinder 310, so that the contact-type measuring part can isolate external moisture from the heat induction mechanism and the heat conduction cylinder 310 through the barrier effect of the sealing ring and the flexible base 301 when the dry-type transformer is measured, thereby avoiding the influence of the moisture nearby the reservoir on the temperature measurement effect of the contact-type measuring part and ensuring the temperature measurement effect of the contact-type measuring part on the dry-type transformer. After tearing off the release paper layer on the contact type measuring part from the surface of the high temperature resistant adhesive layer 303, firstly adhering and fixing one of the high temperature resistant adhesive layers 303 on the surface of the cylindrical winding to be measured on the dry type transformer main body 1, then adhering and fixing the other high temperature resistant adhesive layer on the surface of the cylindrical winding to be measured after tensioning the flexible base, and at the moment, tightly adhering the heat conducting cylinder 310 and the elastic sealing ring on the surface of the cylindrical winding, thereby facilitating the quick installation and fixation of the contact type measuring part for carrying out physical perception monitoring on the temperature of the surface of the cylindrical winding when the dry type transformer main body 1 is operated on the surface of the cylindrical winding to be measured by staff.

Referring to fig. 4, the embodiment of the application provides a dry-type transformer, the thermal induction mechanism comprises a passive elastic membrane 306 connected in a processing bin and temperature-sensing paraffin 307 filled in one end of an inner cavity of the processing bin, which is close to a high-temperature-resistant adhesive layer 303, the temperature-sensing paraffin 307 is high-temperature-sensing paraffin, and the phase transition temperature point of the temperature-sensing paraffin 307 is 70 ℃; the heat inducing mechanism further comprises a approaching excitation seat 308 and an excitation spring 309 which are arranged in the heat insulation bin, wherein one end of the approaching excitation seat 308 far away from the excitation spring 309 is connected with a heat insulation push rod, and one end of the heat insulation push rod far away from the approaching excitation seat 308 penetrates into the treatment bin and is connected with the outer wall of the passive elastic membrane 306. One end of the heat conduction tube 310 extends into the temperature sensing paraffin 307, and the other end of the heat conduction tube protrudes out of one surface of the high temperature resistant adhesive layer 303 away from the flexible base 301. One end of the convex column 302 extends outwards from one side of the flexible base 301 away from the high-temperature-resistant adhesive layer 303, and the other end extends into the heat insulation bin to be connected with the excitation spring piece 309. One end of the hydraulic conduit 315 is communicated with the middle part of the connecting channel 316, and the other end of the hydraulic conduit passes through the passive elastic membrane 306 and the end part of the heat conducting tube 310 respectively and is fixedly communicated with the top of the elastic balloon 312. When the excitation base 308 moves towards the excitation spring 309 and contacts the excitation spring 309, the heat dissipation fan 2 connected to the base of the dry-type transformer body 1 and corresponding to the position of the cylindrical winding on the dry-type transformer body 1 is triggered to be turned on. Because the end of the heat conducting tube 310 protrudes out of the surface of the flexible base 301, when the contact type measuring piece is glued and fixed on the cylindrical winding to be measured on the dry type transformer main body 1, and after the dry type transformer main body 1 operates, the heat energy generated by the cylindrical winding to be measured is transferred to the temperature sensing paraffin 307 through the heat conducting tube 310, when the surface temperature of the winding reaches a set critical value (namely, the phase transition temperature point of the temperature sensing paraffin 307), the approaching excitation seat 308 and the excitation spring 309 are connected with the circuit in the heat dissipation fan at the position corresponding to the cylindrical winding on the dry type transformer main body through wires, the heat dissipation fan is electrically connected with the mains electricity, one end of one wire is connected with the approaching excitation seat 308, the other end of the wire penetrates out of the wall thickness inside of the flexible base 301 and stretches into the heat dissipation fan to be connected with the circuit inside the heat dissipation fan, one end of the other wire is connected with the excitation spring 309, the other end of the heat radiation fan penetrates out of the wall thickness of the flexible base 301 and stretches into the heat radiation fan to be connected with an internal circuit, the part of the two wires in the heat insulation bin is in a loose state, normal movement of the approaching excitation seat 308 is not affected, after the temperature sensing paraffin 307 rapidly expands in volume and drives the approaching excitation seat 308 to contact with the excitation spring 309, the heat radiation fan, the approaching excitation seat 308 and the excitation spring 309 form a loop and trigger the heat radiation fan connected to the base of the dry type transformer main body and at the position corresponding to the cylindrical winding on the dry type transformer main body to be started, the dry type transformer is cooled down in time, heat energy generated when the approaching excitation seat contacts with the excitation spring is isolated through a heat insulation layer arranged on the inner wall of the heat insulation bin, and the heat energy generated when the approaching excitation seat contacts with the excitation spring is prevented from being transferred to the temperature sensing paraffin, and affects the accuracy of the temperature measurement of the thermal induction mechanism.

Referring to fig. 4 and 5, the embodiment of the application provides a dry-type transformer, the elastic telescopic unit includes a piston seat 304 that is hermetically and slidably connected to the inside of the connection channel, a reflective rod 320 is connected to one end of the piston seat 304, a pull arm 314 is connected to the other end of the piston seat, a return spring 319 is sleeved on the periphery of the pull arm 314, a reflective layer is provided on the surface of the reflective rod 320, a supporting frame fixed to the inside of the connection channel is sleeved on the pull arm 314, and the return spring 319 is connected between the piston seat 304 and the supporting frame; the end of the pulling arm 314 remote from the plunger housing 304 is connected to an opposite trigger terminal 313. When the two return springs 319 are in the initial state, the opposite ends of the two opposite-end trigger terminals 313 are closely attached together, and the light reflecting rod 320 is located inside the connection channel. The battery is arranged in the wireless signal transmitter, the two opposite-end trigger terminals 313 are connected with a circuit arranged in the wireless signal transmitter 305 through wires, one end of each wire, which is far away from the opposite-end trigger terminal 313 connected with the wire, penetrates into the wall thickness of the convex column 302 from the inside of the connecting channel 316 and stretches into the inside of the wireless signal transmitter 305 to be connected with the circuit inside the wireless signal transmitter, the part of each wire, which is positioned in the connecting channel 316, is in a loose state, normal movement of the opposite-end trigger terminal 313 connected with the wire is not affected, and when the two opposite-end trigger terminals 313 are contacted, the wireless signal transmitter 305 and the two opposite-end trigger terminals 313 form a loop and trigger the wireless signal transmitter 305 to send out a prompt signal. Because the flexible base 301 is made of flexible materials, when the flexible base 301 is fixed on the surface of the cylindrical winding to be tested on the dry-type transformer main body 1 through the adhesion of the two high-temperature-resistant adhesive layers 303 on the surface of the flexible base, the advancing and retreating rod retracted into the inner cavity of the heat conducting cylinder extrudes and pushes the insulating oil in the elastic balloon 312 into the hydraulic guide tube, and because the internal hydraulic pressure of the connecting channel is increased, the two reflecting rods 320 extend out of the connecting channel to realize external information feedback, when a worker installs the contact type test piece, the fact that the two reflecting rods 320 extend out of the connecting channel is observed, the fact that the end part of the heat conducting cylinder 310 is tightly pressed on the surface of the cylindrical winding to be tested under the action of the tensioned flexible base 301 can be inferred quickly, and therefore when the contact type test piece senses the surface temperature of the cylindrical winding to be tested, heat energy of the winding surface can be stably transferred to the temperature sensing paraffin 307 through the heat conducting cylinder 310. When the contact type measuring part is glued and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body 1, the advancing and retreating rod 311 continuously retracts into the inner cavity of the heat conduction cylinder 310 and continuously pushes insulating oil in the elastic balloon 312 into the hydraulic guide pipe 315, after the contact type measuring part is glued and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body 1, due to the increase of hydraulic pressure in the two connecting channels, the two reflecting rods extend out of the connecting channels and separate the two opposite trigger terminals which are originally clung together, along with the increase of the service time of the contact type measuring part glued and fixed on the surface of the cylindrical winding to be measured on the dry type transformer main body, when the contact type measuring part is released, the convex column 302 is pushed back into the inner cavity of the heat conduction cylinder 310 again under the elastic action of the reset spring, so that the two opposite trigger terminals 313 are contacted again and trigger the wireless signal transmitter 305 to send prompt signals to the outside of the external control terminal (wherein the control terminal is a common prior art with a computer and the like), and relevant staff is reminded to replace the contact type measuring part, so that the dry type measuring part is changed and the dry type measuring part is not influenced by the temperature of the dry type transformer main body 1 when the contact type transformer is not needed, and the contact type transformer is not normally measured, and the temperature of the contact type transformer main body 1 is not normally measured when the contact type transformer is detected.

Claims

1. A dry-type transformer, characterized by: the dry type transformer comprises a dry type transformer body (1), wherein a plurality of cylindrical windings are arranged on the dry type transformer body (1), contact type measuring pieces are arranged on the surface of each cylindrical winding, and a radiating fan (2) is connected to the position, corresponding to each cylindrical winding, of a base of the dry type transformer body (1);

The contact type measuring part comprises a flexible base (301), wherein high-temperature-resistant adhesive layers (303) are respectively arranged on two sides of the surface of the flexible base (301), a release paper layer is covered on one side, far away from the flexible base (301), of the high-temperature-resistant adhesive layers (303), a treatment bin and a heat insulation bin are arranged inside the wall thickness of the flexible base (301), a heat insulation layer (318) is covered on the inner wall of the heat insulation bin, an exhaust channel is further arranged in the flexible base (301), a heat induction mechanism is arranged in the treatment bin, a sealing ring and a heat conduction cylinder (310) are respectively connected to the position, corresponding to the treatment bin, of one side, close to the high-temperature-resistant adhesive layers (303), of the flexible base (301), the sealing ring is arranged on the periphery of the heat conduction cylinder (310), a feeding rod (311) is inserted in a sealing sliding manner in an opening, close to one end, of the heat conduction cylinder (310), an elastic balloon (312) filled with insulating oil is further arranged in the inner cavity of the heat conduction cylinder (310), and an indication structure is arranged at the position, corresponding to the treatment bin, of one side, far away from the high-temperature-resistant adhesive layers (303), of the flexible base (301).

The indicating structure comprises a convex column (302), wherein a connecting channel (316) is arranged inside the convex column (302), two ends of the connecting channel (316) penetrate through the side wall of the convex column (302), elastic telescopic units are arranged inside openings at two ends of the connecting channel (316), a wireless signal transmitter (305) and a hydraulic guide tube (315) are respectively connected inside the convex column (302), and insulating oil is filled in the hydraulic guide tube (315) and the connecting channel (316);

When the flexible base (301) is fixed on the surface of the cylindrical winding through the high-temperature-resistant adhesive layer (303), the advancing rod (311) retreats into the inner cavity of the heat conduction cylinder (310) and forces the elastic telescopic unit to extend out from the inside of the connecting channel (316).

2. A dry-type transformer according to claim 1, wherein: the thermal induction mechanism comprises a passive elastic membrane (306) connected to the inside of the treatment bin and temperature-sensitive paraffin (307) filled in one end of the inner cavity of the treatment bin, which is close to the high-temperature-resistant adhesive layer (303);

The heat induction mechanism further comprises an approaching excitation seat (308) and an excitation elastic sheet (309) which are arranged in the heat insulation bin, wherein one end, far away from the excitation elastic sheet (309), of the approaching excitation seat (308) is connected with a heat insulation push rod, and one end, far away from the approaching excitation seat (308), of the heat insulation push rod penetrates into the treatment bin and is connected with the outer wall of the passive elastic film (306).

3. A dry transformer according to claim 2, wherein: one end of the heat conduction tube (310) stretches into the temperature sensing paraffin (307), and the other end of the heat conduction tube protrudes out of one surface of the high-temperature-resistant adhesive layer (303) away from the flexible base (301).

4. A dry transformer according to claim 2, wherein: one end of the convex column (302) extends outwards from one side of the flexible base (301) away from the high-temperature-resistant adhesive layer (303), and the other end of the convex column extends into the heat insulation bin to be connected with the excitation elastic sheet (309).

5. A dry transformer according to claim 2, wherein: one end of the hydraulic guide pipe (315) is communicated with the middle part of the connecting channel (316), and the other end of the hydraulic guide pipe passes through the passive elastic membrane (306) and the end part of the heat conducting tube (310) respectively and is fixedly communicated with the top of the elastic balloon (312).

6. A dry-type transformer according to claim 1, wherein: one end of the exhaust channel is communicated with one end of the heat insulation bin, which is far away from the high-temperature-resistant adhesive layer (303), and the other end of the exhaust channel penetrates through the side wall of the flexible base (301) to be communicated with the atmosphere;

The flexible base (301) is also provided with a plurality of heat dissipation holes in a penetrating way.

7. A dry-type transformer according to claim 1, wherein: the elastic telescopic unit comprises a piston seat (304) which is connected inside a connecting channel (316) in a sealing and sliding manner, one end of the piston seat (304) is connected with a reflecting rod (320), the other end of the piston seat is connected with a traction arm rod (314), the periphery of the traction arm rod (314) is sleeved with a return spring (319), the surface of the reflecting rod (320) is provided with a reflecting layer, the traction arm rod (314) is sleeved with a supporting frame which is fixed inside the connecting channel (316), and the return spring (319) is connected between the piston seat (304) and the supporting frame;

One end of the pulling arm rod (314) far away from the piston seat (304) is connected with an opposite-end trigger terminal (313).

8. The dry-type transformer of claim 7, wherein: when the two return springs (319) are in an initial state, opposite ends of the two opposite-end trigger terminals (313) are tightly attached together, and the light reflecting rod (320) is positioned inside the connecting channel (316).

9. A dry transformer according to claim 2, wherein: when the approaching excitation seat (308) moves towards the direction of the excitation elastic sheet (309) and is contacted with the excitation elastic sheet (309), the heat radiation fan (2) which is connected to the base of the dry-type transformer main body (1) and corresponds to the position of the cylindrical winding on the dry-type transformer main body (1) is triggered to be started.

10. The dry transformer of claim 8, wherein: when the two opposite trigger terminals (313) are contacted, the wireless signal transmitter (305) is triggered to send out a prompt signal.