Power transformer

Abstract

The invention discloses a power transformer, which relates to the technical field of power equipment, and comprises a base, a through hole, a gland, an extrusion assembly and a composite assembly, the composite assembly is connected in the base in a sliding mode and is provided with a puncture needle and a lighting lamp which are vertically arranged, the puncture needle comprises a plurality of single needle bodies which are distributed in an annular array mode, each single needle body is of a hollow structure, plugging fluid is contained in each single needle body, and the single needle bodies are used for driving the single needle bodies to penetrate into a cable in a pneumatic mode; then, the plugging fluid is sucked into the puncture hole through the negative pressure effect, and the interior of the puncture hole is illuminated through an illuminating lamp so that the plugging fluid can be solidified, and rapid plugging is achieved; the technical effects that flexible plugging adapts to cable bending deformation, the applicability is improved, the plugging reliability is improved, the core wire is completely contacted, the partial discharge risk is reduced, and the measurement precision is improved can be achieved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a power transformer. Background Technology

[0002] Power transformers are key devices in power systems used to convert and isolate high voltage and high current. Their core function is to proportionally convert the high voltage and high current of the primary system into the low voltage and low current of the secondary side for safe use by measuring instruments, relay protection and automatic devices.

[0003] When using power transformers, puncture holes are usually used to measure the current in the cable. However, after the transformer is disassembled, the puncture holes left behind cannot be sealed in time. External moisture (such as rainwater and humidity) may enter the cable, causing a decrease in insulation performance, leakage accidents and safety hazards.

[0004] Currently, the sealing of puncture holes mainly adopts a mechanical linkage method, which involves inserting a rigid sealing body (such as a rubber block or plastic column) for sealing. This method cannot adapt to the bending deformation of the cable. After bending, the sealing layer separates from the cable, forming a leakage channel, reducing the cable's service life. Furthermore, mechanical transmission is prone to accumulating errors and wear, reducing the sealing effect. At the same time, puncture needles often use a single needle or fixed-spaced multi-needle design. When multi-core twisted cables (such as robot drag chain cables) are bent, the core wire positions are prone to shift, causing the puncture needle to only contact part of the core wires, failing to form a complete current path. The uncontacted core wires, because their insulation layer is punctured but not conductive, are prone to surface discharge in humid environments, leading to current sampling distortion. Summary of the Invention

[0005] This application provides a power transformer that solves the technical problems in the prior art where rigid sealing cannot adapt to cable bending deformation, has poor applicability, reduced sealing reliability, cannot fully contact the core wire which easily induces partial discharge, and reduces measurement accuracy. It achieves the technical effects of flexible sealing that adapts to cable bending deformation, improves applicability, improves sealing reliability, fully contacts the core wire to reduce the risk of partial discharge, and improves measurement accuracy.

[0006] This application provides a power transformer, including a base, a perforation, a cover, an extrusion assembly, and a composite assembly;

[0007] The composite component is slidably connected within the base and includes vertically arranged puncture needles and a light. The puncture needle comprises multiple needle units arranged in a circular array. Each needle unit is hollow and contains a sealing fluid. The multiple needle units are pneumatically driven to pierce the cable. Then, negative pressure is applied to draw the sealing fluid into the puncture hole, and the light is used to illuminate the inside of the puncture hole to solidify it, achieving rapid sealing.

[0008] Furthermore, the composite component includes a moving block, a sleeve, an airbag, an air pump, and a puncture needle;

[0009] The moving block is slidably connected to the base inside by a rack in the compression assembly; the sleeve is fixed to the top of the moving block and has an air bladder inside; the puncture needle is fixed to the top of the air bladder and slidably connected inside the sleeve; the air bladder is connected to the air pump through a solenoid valve, is made of fluororubber, and is used to drive the puncture needle to move up and down to achieve puncture.

[0010] Furthermore, the puncture needle includes multiple needle units evenly arranged along the circumference of the sleeve. Each needle unit is fixed to the top of the airbag. During puncture, the needle units are inserted independently, and the insertion depth is automatically adjusted according to the resistance of the cable core wire, so that each core wire in the cable is contacted.

[0011] Furthermore, the needle body is a hollow cylindrical structure with a capsule fixed inside. The capsule is made of silicone and contains a sealing fluid for sealing the puncture hole.

[0012] Furthermore, the needle tip of the single needle is chamfered at 15° and its outer surface is uniformly provided with multiple micropores along its circumference; a one-way membrane is provided on the outer surface of the capsule and on the side opposite to the micropores, so that the sealing fluid is subjected to negative pressure and seeps out through the one-way membrane and micropores into the puncture hole.

[0013] Furthermore, a rotating rod is hinged above the moving block. The rotating rod is driven to rotate by an internal motor, and a light is fixed at its upper end. The light is used to illuminate and solidify the sealing fluid in the puncture hole after the puncture needle is retracted, thereby achieving rapid sealing.

[0014] Furthermore, the sealing fluid is a photocurable hydrogel material and has an elastomer structure after curing. Since the puncture needle is in a sealed state when it completely punctures the cable sheath, the internal pressure between the puncture needle and the cable sheath decreases and is in a negative pressure state when the puncture needle is withdrawn from the cable sheath under the contraction of the air bladder. Therefore, the sealing fluid in the bladder seeps out from the one-way membrane and micropores into the puncture hole under the negative pressure.

[0015] Furthermore, a micro-electrode is fixed to the tip of the needle unit. After detecting a current signal, the micro-electrode triggers the solenoid valve to deflate the airbag, causing the puncture needle to retract. At the same time, the current signal is transmitted to the external control system, which then sends a command to the motor after a one-second delay to control the rotation of the rotating rod and the lamp, thereby achieving photocuring and sealing.

[0016] Furthermore, the blocking fluid includes acrylamide, polyethylene glycol diacrylate, a photoinitiator, and a diluent. Acrylamide is used to provide the polymerization backbone and accounts for 60% to 75% of the total composition; polyethylene glycol diacrylate is used to form a three-dimensional network structure and accounts for 15% to 25% of the total composition; the photoinitiator accounts for 0.5% of the total composition and is used to decompose under ultraviolet irradiation to generate free radicals, initiating the cross-linking and curing reaction of the resin and monomers; the diluent accounts for 14% of the total composition and is used to adjust the viscosity and flowability.

[0017] Furthermore, the duration of ultraviolet light irradiation during the curing of the sealing fluid is 10 seconds, the ultraviolet wavelength is 405nm, and the light intensity is 80mW / cm², in order to ensure the curing quality, that is, the puncture hole with a depth of 3.5mm is sealed within 10 seconds under the irradiation of a 405nm UV light source.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0019] The puncture needle is pneumatically driven to move up and down to achieve puncture and blockage. Multiple individual needles are used to dynamically adjust the puncture depth. Negative pressure is used to drive the sealing fluid into the puncture hole, and solid-state sealing is achieved through light curing by an illumination lamp. This effectively solves the technical problems of rigid sealing in existing technologies, such as inability to adapt to cable bending deformation, poor applicability, reduced sealing reliability, inability to fully contact the core wire which easily induces partial discharge, and reduced measurement accuracy. It achieves the technical effects of flexible sealing that adapts to cable bending deformation, improves applicability, improves sealing reliability, fully contacts the core wire to reduce the risk of partial discharge, and improves measurement accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a power transformer according to the present invention.

[0021] Figure 2 This is a schematic diagram of the perforation structure of a power transformer according to the present invention.

[0022] Figure 3 This is a structural schematic diagram of the composite component and extrusion component of a power transformer according to the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of a composite component of a power transformer according to the present invention.

[0024] Figure 5 This is a longitudinal full sectional view of a composite component of a power transformer according to the present invention.

[0025] Figure 6 This is a cross-sectional view of a composite component of a power transformer according to the present invention.

[0026] Figure 7 This invention relates to a power transformer. Figure 6 A magnified view of a portion of point A in the middle.

[0027] In the diagram: 100, base; 101, perforation; 110, pressure cap; 120, extrusion assembly; 200, composite assembly; 210, moving block; 211, air pump; 220, sleeve; 221, airbag; 230, puncture needle; 231, needle unit; 232, micropore; 233, bladder body; 234, sealing fluid; 235, one-way membrane; 240, rotating rod; 250, illumination lamp; 260, microelectrode. Detailed Implementation

[0028] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0029] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figure 1 This is a schematic diagram of the overall structure of a power transformer according to the present invention. The power transformer of this application achieves puncture and sealing by driving the puncture needle 230 up and down through pneumatic means, and dynamically adjusting the puncture depth by setting multiple needle units 231; the sealing fluid 234 is filled into the puncture hole by negative pressure, and solid sealing is achieved by photocuring through the illumination lamp 250; it achieves the technical effects of flexible sealing that adapts to cable bending deformation, improves applicability, improves sealing reliability, reduces the risk of partial discharge by complete contact with the core wire, and improves measurement accuracy.

[0032] Example 1: As Figures 1 to 4 As shown, this application discloses a power transformer, which includes a base 100, a perforation 101, a pressure cover 110, a compression assembly 120, and a composite assembly 200.

[0033] The composite component 200 is slidably connected within the base 100 and includes vertically arranged puncture needles 230 and a light lamp 250. The puncture needle 230 comprises multiple needle units 231 arranged in a ring array. Each needle unit 231 is hollow and contains a sealing fluid 234. The multiple needle units 231 are pneumatically driven to pierce the cable. Then, the sealing fluid 234 is drawn into the puncture hole by negative pressure. The light lamp 250 illuminates the inside of the puncture hole to solidify it and achieve rapid sealing.

[0034] like Figures 3 to 7 As shown, the composite component 200 includes a moving block 210, a sleeve 220, an airbag 221, an air pump 211, and a puncture needle 230;

[0035] The movable block 210 is slidably connected to the base 100 through the rack in the compression assembly 120; the sleeve 220 is fixed to the top of the movable block 210 and has an airbag 221 inside it; the puncture needle 230 is fixed to the top of the airbag 221 and slidably connected inside the sleeve 220; the airbag 221 is connected to the air pump 211 through a solenoid valve, is made of fluororubber, and is used to drive the puncture needle 230 to move up and down to achieve puncture.

[0036] This application uses a fluororubber airbag 221 to drive the puncture needle 230 up and down via a pneumatic method. When inflated, it pushes the puncture needle 230 upward. The pneumatic system eliminates gear wear, and the elastic material of the airbag 221 can compensate for fluctuations in puncture resistance, preventing rigid jamming.

[0037] The puncture needle 230 includes a plurality of needle units 231 evenly arranged around the sleeve 220. Each needle unit 231 is fixed to the top of the airbag 221. During puncture, the needle unit 231 is inserted independently and the insertion depth is automatically adjusted according to the resistance of the cable core wire, so that each core wire in the cable is contacted.

[0038] This application sets up multiple independent needle units 231 arranged in a ring, with the bottom of each needle unit 231 connected to a flexible airbag 221. This allows for dynamic adjustment of the puncture depth. When encountering a hard core wire, the needle unit automatically retracts, while when encountering a soft core wire, it continues to extend under the action of the airbag 221. By setting up multiple needle units, full coverage contact with the core wires can be achieved, ensuring that each core wire of the multi-core stranded cable is pierced, eliminating poor contact caused by core wire misalignment, and preventing surface discharge caused by unconducted core wires.

[0039] like Figures 4 to 7 As shown, the needle body 231 is a hollow cylindrical structure with a capsule 233 fixed inside. The capsule 233 is made of silicone and contains a sealing fluid 234 for sealing the puncture hole.

[0040] The needle tip of the needle body 231 is chamfered at 15° and has a plurality of micropores 232 evenly distributed on its outer side along its circumference; a one-way membrane 235 is provided on the outer surface of the capsule body 233 and on the side opposite to the micropores 232, so that the sealing fluid 234 is subjected to negative pressure and seeps out through the one-way membrane 235 and the micropores 232 into the puncture hole.

[0041] A rotating rod 240 is hinged above the moving block 210. The rotating rod 240 is driven to rotate by an internal motor. A lamp 250 is fixed at its upper end. The lamp 250 is used to illuminate and solidify the sealing fluid 234 in the puncture hole after the puncture needle 230 is retracted, so as to achieve rapid sealing.

[0042] like Figure 6 and Figure 7 As shown, the sealing fluid 234 is a photocurable hydrogel material and has an elastomer structure after curing. Since the puncture needle 230 is in a sealed state with the cable sheath when the puncture needle 230 completely punctures the cable sheath, the internal pressure between the puncture needle 230 and the cable sheath decreases and is in a negative pressure state when the puncture needle 230 is withdrawn from the cable sheath under the contraction of the air bladder 221. Therefore, the sealing fluid 234 in the bladder 233 seeps out into the puncture hole through the one-way membrane 235 and the micropores 232 under the negative pressure.

[0043] The needle tip of the needle unit 231 is fixed with a micro electrode 260, which is used to trigger the solenoid valve to deflate the airbag 221 after detecting the current signal, so that the puncture needle 230 is retracted. At the same time, the current signal is transmitted to the external control system, and then the external control system sends a command to the motor after a one-second delay to control the rotation of the rotating rod 240 and the lamp 250 to achieve photocuring and sealing.

[0044] This application employs a negative pressure-driven method to achieve precise filling. When the airbag 221 contracts, the puncture hole becomes under negative pressure, allowing the actively drawn-in sealing fluid 234 to penetrate into the interior through the one-way membrane 235 and micropores 232. The one-way membrane 235 only allows the fluid to seep out in one direction, preventing backflow and overcoming the risk of micropore blockage caused by traditional extrusion methods, ensuring uniform fluid coverage of the hole wall. Furthermore, the annular distribution of the micropores 232 allows the sealing fluid 234 to penetrate radially along the hole wall under negative pressure, filling the gaps formed by core wire misalignment during the penetration process. This further eliminates the risk of insulation layer exposure for uncontacted core wires and prevents sampling distortion.

[0045] The microelectrode 260 is used to trigger degassing after detecting the current. The fluid 234 is filled instantly when the needle body is withdrawn. The 1-second delay provides time for the fluid to wet the hole wall, and then solidifies to form a gapless sealing layer. The silicone capsule 233 is elastically deformable to adapt to negative pressure suction, providing a stable driving force for the pressure-resistant deformation of the fluororubber airbag 221.

[0046] Furthermore, the blocking fluid 234 includes acrylamide, polyethylene glycol diacrylate, a photoinitiator, and a diluent. Acrylamide is used to provide the polymerization backbone and accounts for 60% to 75% of the total composition; polyethylene glycol diacrylate is used to form a three-dimensional network structure and accounts for 15% to 25% of the total composition; the photoinitiator accounts for 0.5% of the total composition and is used to decompose under ultraviolet irradiation to generate free radicals, initiating the cross-linking and curing reaction of the resin and monomer; the diluent accounts for 14% of the total composition and is used to adjust the viscosity and flowability.

[0047] This application employs a sealing fluid 234 and a composite system of acrylamide (60%-75%) and polyethylene glycol diacrylate (15%-25%). After curing, it forms a three-dimensional cross-linked network structure of hydrogel elastomer. When the cable bends, the hydrogel network absorbs deformation stress through chain segment rotation / stretching, preventing the sealing layer from separating from the cable due to plastic deformation, as is common in traditional rigid sealing bodies (such as rubber blocks). This eliminates leakage channels formed by bending and extends cable life. Simultaneously, the hydrogel is liquid before curing, allowing it to penetrate micro-cracks in the inner wall of the puncture hole. After curing, it forms a tight adhesion with the cable sheath, reducing interfacial gaps and improving the interfacial bonding strength between the sealing layer and the cable, preventing surface discharge in humid environments.

[0048] Furthermore, during the curing process of the sealing fluid 234, the ultraviolet light irradiation time of the lamp 250 is 10 seconds, the ultraviolet wavelength is 405nm, and the light intensity is 80mW / cm² to ensure the curing quality. That is, under the irradiation of the 405nm UV light source, the puncture hole with a depth of 3.5mm is sealed within 10 seconds.

[0049] This application employs a 405nm ultraviolet lamp to trigger a 0.5% photoinitiator to decompose free radicals, initiating monomer cross-linking and curing (completed in 10 seconds). A 1-second delay in irradiation (after the needle is fully withdrawn) prevents the needle from blocking the ultraviolet light, ensuring synchronous curing from the bottom to the opening of the hole. This allows for controllable curing depth, no reactive fluid residue, and avoids incomplete sealing. Simultaneously, the initial viscosity of the sealing fluid 234 is close to that of water (with a diluent content of 14%-18%). The puncture needle 230 experiences no viscous resistance upon withdrawal, and the 15° chamfer at the needle tip reduces the contact area with the fluid, preventing the removal of uncured material. This maintains the fullness of the sealing fluid 234 within the hole, eliminating mechanical wear.

[0050] A PTFE isolation membrane is provided between the fluororubber airbag 221 and the silicone airbag 221 to prevent gas from mixing in and blocking the fluid 234, thus affecting the curing process and achieving zero hydrogel residue.

[0051] The external control system is used to control the coordinated operation of the air pump 211 and the motor, and is preferably a programmable logic controller; the microelectrode 260 is used to detect the current signal transmitted to the external control system, and then the external control system sends a command to the solenoid valve and the air pump 211 to trigger the solenoid valve to release the air bag 221, and is preferably a MEMS type electrode; the photoinitiator includes a main initiator (i.e., phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide) and a co-initiator (2-hydroxy-2-methylphenylacetone), the main initiator is used for UV-activated free radical polymerization, and the co-initiator is used to accelerate the curing reaction; both are existing technologies and will not be described in detail here.

[0052] Furthermore, the base 100, perforation 101, pressure cap 110 and extrusion assembly 120 in this application are all referenced from a power transformer in patent number CN117012504B, which are prior art. Their specific structure and working principle have been described in detail in the cited patent, so this application will not elaborate further.

[0053] In actual operation, the steps of this embodiment are as follows: First, when it is necessary to measure and monitor the power system, after the cable is passed through the perforation 101 on the base 100 and the pressure cap 110, the compression component 120 rises to compress the cable, thereby causing the cable to abut against the inner wall of the perforation 101, thus fixing the cable; then, the air pump 211 inflates the airbag 221 to drive the puncture needle 230 to move upward, thereby causing the puncture needle 230 to pierce the inside of the cable, that is, the needle unit 231 pierces the cable sheath, and the microelectrode 260 contacts the conductor to form a current path; after the microelectrode 260 detects the current signal and transmits it to the external control system, the external control system sends a command to the solenoid valve and the air pump 211 to trigger the airbag 221. During the degassing process, as the puncture needle 230 retracts within the puncture hole, the sealed space between the puncture hole and the puncture needle 230 is under negative pressure. The sealing fluid 234 seeps into the puncture hole through the one-way membrane 235 and the micropores 232. Finally, the airbag 221 is completely deflated, and the puncture needle 230 retracts due to the contraction of the airbag 221, with the needle tip completely withdrawing from the puncture hole. The sealing fluid 234 remains in the hole, filling it evenly. Simultaneously, the external control system sends a command to the motor with a one-second delay, driving the rotating rod 240 to rotate the positioning lamp 250, irradiating it with 405nm ultraviolet light for 10 seconds (intensity 80mW / cm²), causing the sealing fluid 234 to cross-link and solidify, forming an elastic sealing layer, achieving complete sealing. Afterward, all components return to their original positions.

[0054] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0055] It effectively solves the technical problems of existing technologies, such as rigid sealing being unable to adapt to cable bending deformation, poor applicability, reduced sealing reliability, inability to fully contact the core wire which easily induces partial discharge, and reduced measurement accuracy. It achieves the technical effects of flexible sealing adapting to cable bending deformation, improving applicability, improving sealing reliability, fully contacting the core wire to reduce the risk of partial discharge, and improving measurement accuracy.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power transformer, characterized by It comprises a base (100), a through hole (101), a pressing cover (110), an extrusion assembly (120) and a composite assembly (200); The composite assembly (200) is slidingly connected in the base (100) and is provided with a puncture needle (230) and a light (250) arranged vertically, the puncture needle (230) comprises a plurality of needle units (231) arranged in an annular array, the needle units (231) are hollow structures, and a sealing liquid (234) is arranged in the hollow structures, which is used for driving the needle units (231) to pierce into the cable by a pneumatic mode, and then the sealing liquid (234) is sucked into the puncture hole by a negative pressure, and the inside of the puncture hole is lighted by the light (250) to make the sealing liquid (234) solidify and realize rapid sealing.

2. A power transformer as claimed in claim 1, characterized in that The composite assembly (200) comprises a moving block (210), a sleeve (220), an air bag (221), an air pump (211) and the puncture needle (230); The moving block (210) is slidingly connected in the base (100) by a rack in the extrusion assembly (120); the sleeve (220) is fixed on the top of the moving block (210) and is provided with the air bag (221) in the inside; the puncture needle (230) is fixed on the top of the air bag (221) and is slidingly connected in the sleeve (220); the air bag (221) is communicated with the air pump (211) by a solenoid valve and is made of fluorine rubber, which is used for driving the puncture needle (230) to move up and down to realize puncture.

3. A power transformer as claimed in claim 2, characterised in that, The puncture needle (230) comprises a plurality of needle units (231) uniformly arranged along the circumference of the sleeve (220), each needle unit (231) is fixed on the top of the air bag (221), and the needle units (231) independently pierce into the cable during puncture, and the piercing depth is automatically adjusted according to the resistance of the cable core wire, so that each core wire in the cable is contacted.

4. A power transformer as claimed in claim 3, characterised in that, The needle unit (231) is a hollow cylindrical structure, and a capsule (233) is fixed in the inside, the capsule (233) is made of silica gel and is provided with the sealing liquid (234) in the inside, which is used for sealing the puncture hole.

5. A power transformer as claimed in claim 4, characterised in that, The needle tip of the needle unit (231) is a 15° chamfer, and a plurality of micro-holes (232) are uniformly arranged on the outer side along the circumference; a one-way membrane (235) is arranged on the outer surface of the capsule (233) and opposite to the micro-holes (232), so that the sealing liquid (234) is permeated into the inside of the puncture hole through the one-way membrane (235) and the micro-holes (232) under the action of negative pressure.

6. A power transformer as claimed in claim 2, characterised in that, A rotating rod (240) is hinged above the moving block (210), the rotating rod (240) is driven to rotate by a motor in the inside, and a light (250) is fixed on the upper end of the rotating rod (240), the light (250) is used for lightening the sealing liquid (234) in the puncture hole after the puncture needle (230) is retracted, so that the sealing liquid (234) is solidified to realize rapid sealing.

7. A power transformer as claimed in claim 6, characterised in that The occlusive fluid (234) is a light-cured hydrogel material and is an elastomer structure after curing. When the puncture needle (230) completely penetrates the cable sheath, the puncture needle (230) and the cable sheath are in a sealed state. When the puncture needle (230) is withdrawn from the cable sheath under the contraction of the air bag (221), the internal space pressure between the puncture needle (230) and the cable sheath becomes smaller, and is in a negative pressure state. Therefore, the occlusive fluid (234) in the capsule (233) is exuded to the inside of the puncture hole through the one-way membrane (235) and the micropore (232) under the action of negative pressure.

8. A power transformer as claimed in claim 5, characterised in that, The needle monomer (231) is fixed with a micro electrode (260) at the top of the needle tip, which is used to detect the current signal and trigger the electromagnetic valve to deflate the air bag (221) to make the puncture needle (230) retract. At the same time, the current signal is transmitted to the external control system, and then the external control system delays one second to send instructions to the motor to control the rotation of the rotating rod (240) and the light (250), realizing light-cured occlusion.

9. A power transformer as claimed in claim 7, characterised in that, The occlusive fluid (234) includes acrylamide, polyethylene glycol diacrylate, photoinitiator and diluent. Acrylamide is used to provide a polymer skeleton, accounting for 60% to 75% of the total composition; polyethylene glycol diacrylate is used to form a three-dimensional network structure, accounting for 15% to 25% of the total composition; photoinitiator accounts for 0.5% of the total composition, which is used to decompose free radicals under ultraviolet irradiation, and to initiate the cross-linking and curing reaction of resin and monomer; diluent accounts for 14% to 18% of the total composition, which is used to adjust the viscosity and fluidity.

10. A power transformer as claimed in claim 9, characterised in that, The occlusive fluid (234) is cured under the irradiation of the light (250) for 10 seconds, the wavelength of the ultraviolet light is 405 nm, and the light intensity is 80 mW / cm², so as to ensure the curing quality, that is, the puncture hole occlusion with a depth of 3.5 mm is completed within 10 seconds under the irradiation of the 405 nm UV light source.

Images