An epoxy resin degradation apparatus and method for a transformer

Abstract

The application provides an epoxy resin degradation device and method for a transformer, which comprises a base, a degradation reactor and a laser; the degradation reactor is arranged above the base, the degradation reactor is filled with a degradation liquid, and a transformer winding to be treated is immersed in the degradation liquid; a heating device is further arranged on the base to heat the degradation liquid in the degradation reactor; the degradation reactor is rotatably arranged above the heating device to drive the transformer winding to be treated to rotate; and the laser is adjustably arranged on one side of the degradation reactor to draw a scratch on the surface of the transformer winding to be treated in the vertical and horizontal directions, so as to degrade the epoxy resin layer on the surface of the winding. In the application, the contact area between the transformer winding and the degradation liquid is increased by drawing a scratch on the surface of the transformer winding, so that the cleaning efficiency and effect of the epoxy resin layer of the transformer winding are improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and more specifically, to an epoxy resin degradation device and method for transformers. Background Technology

[0002] With the increasing service life of electrical equipment such as composite insulators, power transformers, and dry-type reactors, a large number of epoxy resin-insulated electrical devices face decommissioning. Currently, the disposal of decommissioned equipment often involves incineration and landfill. On the one hand, traditional incineration and landfill methods waste resources and cause serious environmental pollution; on the other hand, the copper windings in discarded equipment are expensive and have high recycling value. Currently, epoxy resin degradation technology has not been applied to the field of transformer recycling. Due to the large thickness of the resin layer in the winding coils, impurities and low-molecular-weight organic matter generated during the degradation process adhere to the material surface, hindering further contact between the degradation solution and the epoxy resin, thus affecting the degradation rate. There is a lack of a green, non-toxic, efficient, and sustainable method for transformer recycling. To address the shortcomings of existing technologies, the purpose of this invention is to provide an epoxy resin degradation device and method for transformers. Summary of the Invention

[0003] In view of this, the present invention proposes an epoxy resin degradation device and method for transformers, aiming to solve the problem of low epoxy resin degradation efficiency in transformers in the prior art.

[0004] In one aspect, the present invention provides an epoxy resin degradation device for transformers, comprising: a base, a degradation reactor, and a laser; wherein,

[0005] The degradation reactor is located above the base, and the degradation reactor is filled with degradation liquid, in which the transformer winding to be treated is immersed.

[0006] The base is also equipped with a heating device for heating the degradation liquid in the degradation reactor;

[0007] The degradation reactor is rotatably mounted above the heating device to drive the transformer winding to be treated to rotate; the laser is adjustablely mounted on one side of the degradation reactor to scratch the surface of the transformer winding to be treated in both vertical and horizontal directions, thereby degrading the epoxy resin layer on the surface of the winding.

[0008] Furthermore, in the aforementioned epoxy resin degradation device for transformers, the degradation reactor comprises: a shell and a rotating platform; wherein,

[0009] The top of the housing is provided with an openable and closable cover;

[0010] The rotating platform is located at the bottom of the housing and is used to support the transformer winding to be processed.

[0011] Furthermore, in the epoxy resin degradation device for the aforementioned transformer, a condenser is provided at the top of the degradation reactor.

[0012] Furthermore, the epoxy resin degradation device for the aforementioned transformer also includes a temperature sensor for detecting the temperature in the degradation reactor.

[0013] Furthermore, in the epoxy resin degradation device for the aforementioned transformer, a moving mechanism is provided below the laser to drive the laser to move in both the horizontal and vertical directions.

[0014] Furthermore, the epoxy resin degradation device for the above-mentioned transformer also includes a speed sensor, which is electrically connected to the degradation reactor to obtain the rotational speed data of the degradation reactor.

[0015] Furthermore, the epoxy resin degradation device for the aforementioned transformer also includes: a controller; wherein,

[0016] 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 inside the degradation reactor;

[0017] The controller is electrically connected to the speed sensor, the rotating platform in the degradation reactor, and the moving mechanism below 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 light to scratch the epoxy resin layer of the transformer winding.

[0018] Furthermore, in the aforementioned epoxy resin degradation device for the transformer, the moving mechanism includes: a lifting platform and a linear guide rail; wherein,

[0019] 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.

[0020] The epoxy resin degradation device for transformers in this invention degrades transformer windings by filling a degradation reactor with degradation liquid. A heating device is installed below the degradation reactor to heat the degradation liquid and increase the degradation reaction rate. Furthermore, a laser is installed on one side of the degradation reactor to scratch the surface of the transformer windings, thereby increasing the contact area between the transformer windings and the degradation liquid and improving the cleaning efficiency and effect of the epoxy resin layer of the transformer windings.

[0021] On the other hand, the present invention also proposes a method for degrading epoxy resin in transformers, comprising the following steps:

[0022] Step 1: Immerse the transformer windings to be treated into a degradation reactor containing degradation solution;

[0023] Step 2: Turn on the heating device to heat the degradation liquid to a preset temperature, rotate the degradation reactor relative to the heating device, turn on the laser and adjust the direction of movement of the laser to clean the epoxy resin layer on the surface of the transformer winding.

[0024] Furthermore, in the above-mentioned method for degrading epoxy resin in transformers, the laser increases the contact area between the epoxy resin layer of the transformer windings and the degradation solution by engraving grid-like scratches on the surface of the transformer windings to be cleaned.

[0025] The epoxy resin degradation method for transformers provided by this invention heats the degradation liquid in the degradation reactor using a heating device to accelerate the degradation reaction rate, and uses a laser to etch marks on the surface of the transformer windings to increase the contact area between the epoxy resin layer of the transformer windings and the degradation liquid, thereby greatly accelerating the cleaning efficiency. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is a schematic diagram of the epoxy resin degradation device for a transformer provided in an embodiment of the present invention. Detailed Implementation

[0028] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Device Example:

[0030] See Figure 1The epoxy resin degradation device for transformers according to an embodiment of the present invention includes: a base 1, a degradation reactor 2, and a laser 3; wherein, the degradation reactor 2 is disposed above the base 1, the degradation reactor 2 is filled with a degradation liquid, and the transformer winding 24 to be treated is immersed in the degradation liquid; a heating device 4 is also disposed on the base 1 for heating the degradation liquid in the degradation reactor 2; the degradation reactor is rotatably disposed above the heating device 4 for driving the transformer winding 24 to be treated to rotate; the laser 3 is adjustablely disposed on one side of the degradation reactor 2 for scratching the surface of the transformer winding 24 to be treated along the vertical and horizontal directions to degrade the epoxy resin layer on the surface of the winding 24.

[0031] Specifically, the base 1 may include a support plate and multiple supports; wherein the supports are evenly distributed at the bottom of the supports. More specifically, this embodiment has four supports, each of which is respectively located at each corner of the support plate. The supports may consist of a chassis and a lifting column connected above it.

[0032] The transformer winding 24 to be processed can be a dry-type transformer winding.

[0033] The degradation reactor 2 is filled with a degradation solution, which can be an alcohol solvent (such as ethylene glycol, propylene glycol, etc.) + a thiol compound containing a mercapto group (such as dithiothreitol, mercaptoacetic acid, etc.) + a catalyst (such as TBD, zinc acetylacetonate, stannous isooctanoate, etc.).

[0034] In specific implementation, the degradation reactor 2 includes: a shell 21 and a rotating platform 22; wherein, the top of the shell 21 is provided with an openable and closable cover 23; the rotating platform 22 is located at the bottom of the shell 21 and is used to support the transformer winding 24 to be treated and drive the transformer winding 24 to rotate.

[0035] More specifically, the housing 21 can be in the shape of a column or cylinder with an open top, and the size of the cover 23 can be adapted to the size of the opening at the top of the housing 21. The housing 21 can be made of a transparent material, such as glass. The rotating platform 22 can be embedded in the bottom of the housing 21, and the transformer winding 24 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.

[0036] Preferably, a condenser 5 is provided at the top of the degradation reactor 2 to transfer heat from the degradation reactor to the outside, thereby helping to maintain the temperature inside the degradation reactor.

[0037] Heating device 4 is equipped with heating wires, which heat the degradation liquid.

[0038] A moving mechanism 6 is provided below the laser 3 to move the laser 3 in both horizontal and vertical directions. The bottom of the moving mechanism 6 is fixedly connected to the base 1. The emitting end of the laser 3 can be oriented towards the degradation reactor 2 to facilitate effective laser penetration to the surface of the epoxy resin layer of the transformer winding 24 to be treated.

[0039] More specifically, the moving mechanism 6 includes a lifting platform 61 and a linear guide rail 62; wherein the bottom of the lifting platform 61 is connected to the base 1, and the linear guide rail 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 rail 62, and the bottom of the linear guide rail 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 rail 62 can move horizontally. It can be seen that by moving the laser 3 up and down and left and right through the moving mechanism 6, the laser cleans the transformer winding 24 to be treated in the degradation reactor 2, causing impurities and low-molecular-weight organic matter attached to the surface of the transformer winding 24 to be treated to quickly fall off, exposing the inner epoxy resin material, increasing the contact between the degradation liquid and the epoxy resin material, thereby improving the degradation reaction rate.

[0040] In this embodiment, a temperature sensor (not shown in the figure) is also included to detect the temperature in the degradation reactor 2.

[0041] Furthermore, this embodiment may also include a speed sensor (not shown in the figure), which is electrically connected to the degradation reactor 2 to obtain the rotational speed data of the degradation reactor 2. Specifically, the speed sensor is connected to the rotating platform 22 to obtain the rotational speed of the rotating platform 22.

[0042] Obviously, this embodiment 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, and is used to control the heating device 4 and the condenser 5 according to the received temperature data to adjust the temperature inside 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 below the laser 3, and is used to control the rotation speed of the degradation reactor 2 and the relative position of the degradation reactor 2 and the laser 3 according to the received rotation speed data, so that the laser 3 emits laser light to scratch the epoxy resin layer of the transformer winding 24.

[0043] 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 reactor with degradation liquid, and sets a heating device below the degradation reactor to heat the degradation liquid, thereby increasing the degradation reaction rate; furthermore, by setting a laser on one side of the degradation reactor to scratch the surface of the transformer winding, the contact area between the transformer winding and the degradation liquid is increased, thereby improving the cleaning efficiency and cleaning effect of the epoxy resin layer of the transformer winding.

[0044] Method Implementation Examples:

[0045] The present invention also provides a method for degrading epoxy resin in transformers, comprising the following steps:

[0046] Step 1: Immerse the transformer winding 24 to be treated into the degradation reactor 2 containing the degradation solution, and close the cover 23 of the degradation reactor 2 to seal the reaction vessel.

[0047] In practice, the winding 24 of the dry-type transformer is immersed in a reaction vessel containing degradation solution.

[0048] Step 2: Turn on the heating device 4 to heat the degradation liquid to a preset temperature, so that the degradation reactor 2 rotates 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 24.

[0049] Specifically, the preset temperature can be 180-220℃, preferably 200℃. The rotating platform 22 is activated to rotate the transformer winding 24. The laser 3 increases the contact area between the epoxy resin layer of the transformer winding 24 and the degradation solution by etching a grid-like pattern on the surface of the transformer winding 24 to be cleaned.

[0050] This invention increases the contact area between the epoxy resin layer and the degradation liquid by etching marks on the surface of the transformer winding 24, thereby greatly accelerating the cleaning efficiency and improving the efficiency by up to 200%.

[0051] Preferably, the condenser 5 is turned on simultaneously with the heating device 4 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 24 at preset intervals. The preset interval can be 20-60 minutes, preferably 30 minutes.

[0052] In practice, heating device 4 and condenser 5 are turned on. Once the temperature of the degradation solution rises to the predetermined temperature, it is kept constant. The controller controls the rotating platform 22 to start working and controls the laser 3 to clean the surface of the transformer winding 24 in the degradation reactor 2 every 30 minutes to create a grid-like scratch on the surface of the winding 24. During the degradation process, small particles that cannot be detached in time, degraded oligomers, impurities, etc., form a film layer on the surface, hindering further contact between the solvent and the epoxy resin. Simultaneously with the degradation reaction, laser scratching is performed every 30 minutes to destroy the surface film layer. By reconstructing the surface morphology of the sample, the contact area between reactants is increased, thereby improving 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 24 rotates continuously during the degradation process, allowing the laser 3 to uniformly scratch the surface of the transformer winding 24. As the epoxy resin continues to degrade, the degradation solution becomes increasingly turbid until the laser can no longer penetrate it.

[0053] As the epoxy resin degrades, the degradation solution becomes increasingly turbid, the focal length changes accordingly, and heat absorption decreases exponentially until the laser can no longer penetrate. The epoxy resin material and other impurities on the outer surface of the copper coil continuously peel off until the copper material is exposed, thus enabling the recovery of copper material in winding 24.

[0054] The relevant parts of the method embodiments and the above-described device embodiments can be referred to each other, and will not be repeated here.

[0055] In summary, this invention promotes the degradation reaction rate by heating the degradation liquid in the degradation reactor using a heating device; and increases the contact area between the epoxy resin layer of the transformer winding and the degradation liquid by etching marks on the surface of the transformer winding using a laser, thereby greatly accelerating the cleaning efficiency.

[0056] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An epoxy resin degradation device for a transformer, characterized in that, include: The system comprises a base, a degradation reactor, and a laser. The degradation reactor is positioned above the base and filled with a degradation solution, in which the transformer winding to be treated is immersed. The degradation solution consists of an alcohol solvent, a thiol compound containing a mercapto group, and a catalyst. A heating device is also provided on the base to heat the degradation solution in the reactor to 180-220°C. The degradation reactor is rotatably positioned above the heating device to rotate the transformer winding to be treated. The laser is adjustablely positioned on one side of the degradation reactor to scratch the surface of the transformer winding at preset intervals along both vertical and horizontal directions during the degradation reaction, thereby degrading the epoxy resin layer on the winding surface. A temperature sensor is used to detect the temperature in the degradation reactor. Temperature; a moving mechanism is provided below the laser to drive the laser to move horizontally and vertically; a speed sensor is electrically connected to the degradation reactor to obtain the rotational speed data of the degradation reactor; a controller; wherein the controller is connected to the temperature sensor, the heating device, and the condenser above the heating device to control the heating device and the condenser to adjust the temperature inside the degradation reactor according to the received temperature data; the controller is electrically connected to the speed sensor, the rotating platform in the degradation reactor, and the moving mechanism below the laser to control the rotational speed of the degradation reactor and the relative position of the degradation reactor and the laser according to the received rotational speed data, so that the laser emits laser light to scratch the epoxy resin layer of the transformer winding.

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

3. The epoxy resin degradation device for transformers according to claim 1, characterized in that, A condenser is installed at the top of the degradation reactor.

4. The epoxy resin degradation device for transformers 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.

5. A method for degrading the epoxy resin layer of a transformer using the epoxy resin degradation device as described in any one of claims 1 to 4, characterized in that, Includes the following steps: Step 1: Immerse the transformer windings to be treated into a degradation reactor containing degradation solution; Step 2: Turn on the heating device to heat the degradation liquid to 180-220℃, rotate the degradation reactor relative to the heating device, turn on the laser and adjust the movement direction of the laser to clean the epoxy resin layer on the surface of the transformer winding; clean the surface of the transformer winding in the degradation reactor at preset intervals to engrave grid-like scratches on the winding surface to destroy the surface film layer.

6. The method for degrading the epoxy resin layer of a transformer according to claim 5, characterized in that, The laser increases the contact area between the epoxy resin layer of the transformer winding and the degradation solution by etching a grid-like scratch on the surface of the transformer winding to be cleaned.

Images