Epoxy resin degradation device and method for transformer

Abstract

The invention provides an epoxy resin degradation device and method for a transformer. The epoxy resin degradation device comprises a base, a degradation reactor and a laser, the degradation reactor is arranged above the base, degradation liquid is filled in the degradation reactor, and a transformer winding to be treated is immersed in the degradation liquid; a heating device is also arranged on the base and is used for heating degradation liquid in the degradation reactor; the degradation reactor is rotatably arranged above the heating device and is used for driving the transformer winding to be treated to rotate; the laser device is arranged on one side of the degradation reactor in a position-adjustable manner and is used for carving scratches on the surface of the transformer winding to be treated in the vertical direction and the horizontal direction so as to degrade an epoxy resin layer on the surface of the winding. According to the method, the contact area of the transformer winding and the degradation liquid is increased by carving the scratches on the surface of the transformer winding, so that the cleaning efficiency and the cleaning effect of the epoxy resin layer of the transformer winding are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a device and method for epoxy resin degradation of a transformer. Background Art

[0002] With the increase in the service life of electrical equipment such as composite insulators, power transformers, and dry-type reactors, a large number of epoxy resin insulated electrical equipment are facing the problem of retirement. For the treatment of retired equipment, incineration and landfilling are currently commonly used. On the one hand, traditional incineration and landfilling methods waste resources and cause serious pollution to the environment; on the other hand, the copper windings in the discarded equipment are expensive and have a high recycling value. At present, epoxy resin degradation technology has not been applied to the field of transformer recycling. Due to the large thickness of the resin layer of the winding coil, impurities and low-molecular organic matter generated during the degradation process adhere to the surface of the material, hindering the degradation liquid from further contacting with the epoxy resin and affecting the degradation rate. There is a lack of a green, non-toxic, efficient and sustainable method for transformer recycling. In view of the defects of the prior art, the purpose of the present invention is to provide an epoxy resin degradation device and method for a transformer. Summary of the invention

[0003] In view of this, the present invention proposes a device and method for epoxy resin degradation of a transformer, aiming to solve the problem of low efficiency of epoxy resin degradation of the transformer in the prior art. In one aspect, the present invention provides an epoxy resin degradation device for a transformer, comprising: a base, a degradation reactor and a laser; wherein: The degradation reactor is arranged above the base, the degradation reactor is filled with a degradation liquid, and the degradation liquid does not contain the transformer winding to be processed; The base is also provided with a heating device for heating the degradation liquid in the degradation reactor; The degradation reactor is rotatably arranged above the heating device to drive the transformer winding to be processed to rotate; the laser is adjustably arranged on one side of the degradation reactor to scratch the surface of the transformer winding to be processed in the vertical and horizontal directions to degrade the epoxy resin layer on the surface of the winding.

[0004] Furthermore, in the epoxy resin degradation device for the transformer, the degradation reactor comprises: a housing and a rotating platform; wherein, The top of the shell is provided with an openable and closable cover; The rotating platform is arranged at the bottom of the shell and is used for carrying the transformer winding to be processed.

[0005] Furthermore, in the epoxy resin degradation device for the transformer, a condenser is provided on the top of the degradation reactor.

[0006] Furthermore, the epoxy resin degradation device for the transformer further comprises: a temperature sensor for detecting the temperature in the degradation reactor.

[0007] Furthermore, in the epoxy resin degradation device for the transformer, a moving mechanism is provided below the laser to drive the laser to move in horizontal and vertical directions.

[0008] Furthermore, the epoxy resin degradation device for the transformer further comprises: a speed sensor, which is electrically connected to the degradation reactor and is used to obtain rotation speed data of the degradation reactor.

[0009] Furthermore, the epoxy resin degradation device for the transformer further includes: a controller; wherein, The controller is connected to the temperature sensor, the heating device and the condenser above the heating device, and is used to control the heating device and the condenser according to the received temperature data to adjust the temperature in the degradation reactor; The controller is electrically connected to the speed sensor, the rotating platform in the degradation reactor and the moving mechanism under the laser, and is used to control the rotation speed of the degradation reactor and the relative position of the degradation reactor and the laser according to the received rotation speed data, so that the laser emits laser to scratch the epoxy resin layer of the transformer winding.

[0010] Furthermore, in the epoxy resin degradation device for the transformer, the moving mechanism comprises: a lifting platform and a linear guide rail; wherein, The bottom of the lifting platform is connected to the base, and the linear guide rail is connected to the top of the lifting platform.

[0011] The epoxy resin degradation device for transformers of the present invention degrades transformer windings by filling a degradation liquid in a degradation reactor, and arranging a heating device below the degradation reactor to heat the degradation liquid and increase the degradation reaction rate; further, a laser is arranged on one side of the degradation reactor to scratch the surface of the transformer winding to increase the contact area between the transformer winding and the degradation liquid, so as to improve the cleaning efficiency and cleaning effect of the epoxy resin layer of the transformer winding.

[0012] On the other hand, the present invention also provides a method for epoxy resin degradation of a transformer, comprising the following steps: Step 1, immersing the transformer winding to be treated in a degradation reactor filled with a degradation solution; Step 2, turning on the heating device, heating the degradation liquid to a preset temperature, rotating the degradation reactor relative to the heating device, turning on the laser and adjusting the moving direction of the laser to clean the epoxy resin layer on the surface of the transformer winding.

[0013] Furthermore, in the above-mentioned transformer epoxy resin degradation method, the laser scratches grid-like marks on the surface of the transformer winding to be cleaned to increase the contact area between the epoxy resin layer of the transformer winding and the degradation liquid.

[0014] The epoxy resin degradation method for transformers provided by the present invention heats the degradation liquid in the degradation reactor by a heating device to promote the degradation reaction rate, and marks are made on the surface of the transformer winding by a laser to increase the contact area between the epoxy resin layer of the transformer winding and the degradation liquid, thereby greatly accelerating the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic structural diagram of an epoxy resin degradation device for a transformer provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0017] Device Example: See also Figure 1The epoxy resin degradation device for transformers of the embodiment of the present invention comprises: a base 1, a degradation reactor 2 and a laser 3; wherein the degradation reactor 2 is arranged above the base 1, and is filled with a degradation liquid in the degradation reactor 2, and the transformer winding 3 to be processed is immersed in the degradation liquid; a heating device 4 is also arranged on the base 1 to heat the degradation liquid in the degradation reactor 2; the degradation reactor is rotatably arranged above the heating device 4 to drive the transformer winding 3 to be processed to rotate; the laser 3 is adjustably arranged on one side of the degradation reactor 2 to scratch the surface of the transformer winding 3 to be processed in the vertical and horizontal directions to degrade the epoxy resin layer on the surface of the winding 3.

[0018] Specifically, the base 1 may include: a support plate and a plurality of supports; wherein the supports are evenly distributed at the bottom of the support. More specifically, in this embodiment, there are four supports, each of which is disposed at each corner of the support plate. The support may be composed of a chassis and a lifting column connected above it.

[0019] The transformer winding 3 to be processed may be a dry-type transformer winding 3 .

[0020] The degradation reactor 2 is filled with a degradation liquid, which may be an alcohol solvent (such as ethylene glycol, propylene glycol, etc.) + a thiol compound containing a thiol group (such as dithiothreitol, thioglycolic acid, etc.) + a catalyst (such as TBD, zinc acetylacetonate, stannous isooctanoate, etc.).

[0021] In specific implementation, the degradation reactor 2 includes: a shell 21 and a rotating platform 22; wherein, a cover 23 that can be opened and closed is arranged on the top of the shell 21; the rotating platform 22 is arranged at the bottom of the shell 21, and is used to carry the transformer winding 3 to be processed and drive the transformer winding 3 to rotate.

[0022] More specifically, the housing 21 may be in a columnar or cylindrical shape with an opening at the top, and the size of the cover 23 may be adapted to the size of the opening at the top of the housing 21. The housing 21 may be made of a transparent material, such as glass. The rotating platform 22 may be embedded in the bottom of the housing 21, and the transformer winding 3 to be processed is placed on the rotating platform 22. The bottom of the rotating platform 22 is connected to the top of the heating device 4.

[0023] Preferably, a condenser 5 is provided on the top of the degradation reactor 2 to transfer the heat in the degradation reactor to the outside, thereby facilitating the maintenance of the temperature inside the degradation reactor.

[0024] The heating device 4 is provided with a heating wire, and the degradation liquid is heated by the heating wire.

[0025] A moving mechanism 6 is provided below the laser 3 to drive the laser 3 to move in the horizontal and vertical directions. The bottom of the moving mechanism 6 is fixedly connected to the base 1. The emission end of the laser 3 can be arranged toward the degradation reactor 2 so that the laser can effectively penetrate the epoxy resin layer surface of the transformer winding 3 to be processed.

[0026] More specifically, the moving mechanism 6 includes: a lifting platform 61 and a linear guide 62; wherein the bottom of the lifting platform 61 is connected to the base 1, and the linear guide 62 is connected to the top of the lifting platform 61. The bottom of the laser 3 is connected to the top of the linear guide 62, and the bottom of the linear guide 62 is engaged with the lifting platform 61. The bottom of the lifting platform 61 is connected to the base 1. The lifting platform 61 can drive the laser 3 to move up and down, and the linear guide 62 can move in the horizontal direction. It can be clearly seen that the laser 3 is driven to move up and down and left and right by the moving mechanism 6, and the laser cleans the transformer winding 3 to be processed in the degradation reactor 2, so that impurities, low molecular organic matter, etc. attached to the surface of the transformer winding 3 to be processed fall off quickly, exposing the inner epoxy resin material, increasing the contact between the degradation liquid and the epoxy resin material, and thus increasing the degradation reaction rate.

[0027] In this embodiment, it also includes: a temperature sensor (not shown in the figure) for detecting the temperature in the degradation reactor 2.

[0028] Furthermore, the present embodiment may also include: a speed sensor (not shown in the figure), which is electrically connected to the degradation reactor 2 to obtain the rotation speed data of the degradation reactor 2. Specifically, the speed sensor is connected to the rotating platform 22 to obtain the rotation speed of the rotating platform 22.

[0029] Obviously, in this embodiment, it also includes: a controller (not shown in the figure); wherein the controller is connected to the temperature sensor, the heating device 4 and the condenser 5 above the heating device 4, so as to control the heating device 4 and the condenser 5 according to the received temperature data to adjust the temperature in the degradation reactor 2; the controller is electrically connected to the speed sensor, the rotating platform 22 in the degradation reactor 2 and the moving mechanism 6 under the laser 3, so as to control the rotation speed of the degradation reactor 2 according to the received rotation speed data and control the relative position of the degradation reactor 2 and the laser 3, so that the laser 3 emits laser to scratch the epoxy resin layer of the transformer winding 3.

[0030] From the above, it can be concluded that the transformer epoxy resin degradation device provided by the present invention degrades the transformer winding by filling the degradation liquid in the degradation reactor, and arranging a heating device under the degradation reactor to heat the degradation liquid and increase the degradation reaction rate; further, by arranging a laser on one side of the degradation reactor, scratching the surface of the transformer winding to increase the contact area between the transformer winding and the degradation liquid, so as to improve the cleaning efficiency and cleaning effect of the epoxy resin layer of the transformer winding.

[0031] Method Example: The present invention also provides a method for epoxy resin degradation of a transformer, comprising the following steps: Step 1: immerse the transformer winding 3 to be processed into a degradation reactor 2 filled with a degradation liquid, and close the cover 23 of the degradation reactor 2 to make the reaction container sealed.

[0032] During the specific implementation, the winding 3 of the dry-type transformer is immersed in a reaction container filled with degradation liquid.

[0033] Step 2, turn on the heating device 4, heat the degradation liquid to a preset temperature, rotate the degradation reactor 2 relative to the heating device 4, turn on the laser 3 and adjust the moving direction of the laser 3 to clean the epoxy resin layer on the surface of the transformer winding 3.

[0034] Specifically, the preset temperature may be 180-220° C., preferably 200° C. The rotating platform 22 is turned on to rotate the transformer winding 3. The laser 3 scratches the surface of the transformer winding 3 to be cleaned in a grid-like manner to increase the contact area between the epoxy resin layer of the transformer winding 3 and the degradation liquid.

[0035] The embodiment of the present invention increases the contact area between the epoxy resin layer of the transformer winding 3 and the degradation liquid by engraving marks on the surface of the transformer winding 3, thereby greatly accelerating the cleaning efficiency, and the improvement efficiency can reach 200%.

[0036] Preferably, the condenser 5 is turned on while the heating device 4 is turned on, so as to control the temperature in the degradation reactor 2. In this embodiment, the laser 3 is controlled by the controller to clean the transformer winding 3 at preset time intervals. The preset time can be 20-60 minutes, and preferably, the preset time is 30 minutes.

[0037] In the specific implementation, the heating device 4 and the condenser 5 are turned on, and the temperature of the degradation liquid is kept constant after it rises to a predetermined temperature. The controller controls the rotating platform 22 to start working, and controls the laser 3 to clean the surface of the transformer winding 3 in the degradation reactor 2 every 30 minutes to draw grid-like scratches on the surface of the winding 3; during the degradation process, small particles that do not have time to fall off, oligomers after degradation, impurities, etc. form a film layer on the surface to hinder the solvent from further contacting the epoxy resin. During the degradation reaction, laser scratching is performed every 30 minutes to destroy the surface film layer, and the contact area between the reactants is increased by reconstructing the surface morphology of the sample, thereby increasing the degradation reaction rate of the epoxy resin. The controller controls the moving mechanism 6 to move up and down and left and right at a uniform speed, so that the winding 3 continues to rotate during the degradation process, so that the laser 3 evenly scratches the surface of the transformer winding 3. As the epoxy resin continues to degrade, the degradation liquid becomes increasingly turbid until the laser cannot penetrate.

[0038] As the epoxy resin continues to degrade, the degradation liquid becomes increasingly turbid, the focal length changes accordingly, and the heat absorption decreases exponentially until the laser cannot penetrate. The epoxy resin material and other impurity materials on the outer surface of the copper coil continue to peel off until the copper material is exposed, thereby realizing the recovery of the copper material in the winding 3.

[0039] The related parts of the method embodiment and the above-mentioned device embodiment can be referred to each other and will not be described in detail here.

[0040] In summary, the present invention heats the degradation liquid in the degradation reactor by a heating device to promote the rate of the degradation reaction; and marks are made on the surface of the transformer winding by a laser to increase the contact area between the epoxy resin layer of the transformer winding and the degradation liquid, thereby greatly accelerating the cleaning efficiency.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A transformer epoxy resin degradation device, characterized in that: include: base, degradation reactor and laser; wherein, The degradation reactor is arranged above the base, the degradation reactor is filled with a degradation liquid, and the degradation liquid does not contain the transformer winding to be processed; The base is also provided with a heating device for heating the degradation liquid in the degradation reactor; The degradation reactor is rotatably arranged above the heating device to drive the transformer winding to be processed to rotate; the laser is adjustably arranged on one side of the degradation reactor to scratch the surface of the transformer winding to be processed in the vertical and horizontal directions to degrade the epoxy resin layer on the surface of the winding.

2. The epoxy resin degradation device for transformer according to claim 1, characterized in that: The degradation reactor comprises: a shell and a rotating platform; wherein, The top of the shell is provided with an openable and closable cover; The rotating platform is arranged at the bottom of the shell and is used for carrying the transformer winding to be processed.

3. The epoxy resin degradation device for transformer according to claim 1, characterized in that: A condenser is arranged on the top of the degradation reactor.

4. Transformer The epoxy resin degradation device for transformer according to claim 1, characterized in that: Also includes: A temperature sensor is used to detect the temperature in the degradation reactor.

5. The epoxy resin degradation device for transformer according to claim 1, characterized in that: A moving mechanism is arranged below the laser to drive the laser to move in horizontal and vertical directions.

6. The epoxy resin degradation device for transformer according to claim 5, characterized in that: Also includes: A speed sensor is electrically connected to the degradation reactor and is used to obtain rotation speed data of the degradation reactor.

7. The epoxy resin degradation device for transformer according to claim 6, characterized in that: Also includes: controller; wherein, The controller is connected to the temperature sensor, the heating device and the condenser above the heating device, and is used to control the heating device and the condenser according to the received temperature data to adjust the temperature in the degradation reactor; The controller is electrically connected to the speed sensor, the rotating platform in the degradation reactor and the moving mechanism under the laser, and is used to control the rotation speed of the degradation reactor and the relative position of the degradation reactor and the laser according to the received rotation speed data, so that the laser emits laser to scratch the epoxy resin layer of the transformer winding.

8. The epoxy resin degradation device for transformer according to claim 1, characterized in that: The moving mechanism includes: a lifting platform and a linear guide rail; wherein, The bottom of the lifting platform is connected to the base, and the linear guide rail is connected to the top of the lifting platform.

9. A method for degrading the epoxy resin layer of a transformer using the epoxy resin degradation device for a transformer as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, immersing the transformer winding to be treated in a degradation reactor filled with a degradation solution; Step 2, turning on the heating device, heating the degradation liquid to a preset temperature, rotating the degradation reactor relative to the heating device, turning on the laser and adjusting the moving direction of the laser to clean the epoxy resin layer on the surface of the transformer winding.

10. The method for epoxy resin degradation of transformer according to claim 9, characterized in that: The laser scratches grid-like marks on the surface of the transformer winding to be cleaned, so as to increase the contact area between the epoxy resin layer of the transformer winding and the degradation liquid.

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