Transformer oiling and filtering all-in-one machine with composite filter structure

Abstract

The application discloses a transformer oil injection and filtration all-in-one machine with a composite filtering structure, which comprises a vehicle frame, a rough filtering module, a fine filtering module, an exhaust conversion valve module and a safe quick-release oil pipeline module; four universal wheels are fixedly installed at the bottom of the vehicle frame; a push-pull handle is fixedly installed on the outer wall of one end of the vehicle frame; a support plate is fixedly connected between the inner walls of the push-pull handle; a control electric box is fixedly installed on the support plate; and a driving pump is fixedly installed on the vehicle frame. The driving pump, the rough filtering module, the fine filtering module and the exhaust conversion valve module are integrated on the vehicle frame, and are matched with the safe quick-release oil pipeline module to construct a modular integrated structure, so that an integrated purification transmission architecture of "rough filtering, fine filtering, exhaust control, electrostatic shielding and remote monitoring" is realized, thereby not only remarkably improving the purification effect, but also comprehensively improving the safety protection, and further reducing the equipment maintenance cost and operation loss.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to an integrated transformer oil injection and filtration machine with a composite filtration structure. Background Technology

[0002] In power system operation, transformers are core equipment, and the purity of their insulating oil directly determines the equipment's lifespan and power supply safety. Currently, the mainstream method for transformer oil filling is the traditional gear pump type oil filling machine, equipped with a conventional oil filtration device. The core technical logic is to use the gear pump to power the insulating oil, while relying on a basic filtration structure (such as a common metal filter screen) to remove some impurities from the oil, and finally inject the insulating oil into the transformer to complete the oil filling process.

[0003] Currently, traditional oil filling machines use gear pumps to transfer insulating oil. This technology has been used in the power industry for a long time and is a standard equipment configuration in traditional transformer operation and maintenance. It lacks special modular design, intelligent control, or high-precision purification technology, relying mainly on manual operation to complete all aspects of equipment assembly, oil transfer, and process switching. It has significant drawbacks, such as: insufficient impurity filtration capacity, posing equipment safety hazards; cumbersome operation procedures and low work efficiency; lack of safety protection, posing oil transfer risks; high maintenance costs; and susceptibility to secondary pollution. Therefore, it easily generates iron filings during operation. These iron filings enter the transformer with the oil and adhere to the iron core, potentially damaging the winding insulation layer and causing equipment failure. To solve the problems of iron filings residue, static electricity risks, and inconvenient operation associated with traditional equipment, this invention proposes an integrated transformer oil filling and filtration machine with a composite filtration structure. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated transformer oil injection and filtration machine with a composite filtration structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a transformer oil injection and filtration integrated machine with a composite filtration structure, including the frame, coarse filter module, fine filter module, exhaust conversion valve module, and safe quick-release oil delivery pipeline module; Four omnidirectional wheels are fixedly installed at the bottom of the frame. A push-pull handle is fixedly installed on the outer wall of one end of the frame. A support plate is fixedly connected between the inner walls of the push-pull handle. A control box is fixedly installed on the support plate. A drive pump is fixedly installed on the frame. A coarse filter module is connected to one side of the drive pump through a pipeline. A first quick-connect plug is connected to the other side of the coarse filter module. A fine filter module is connected to the other side of the drive pump through a pipeline. A second quick-connect plug is connected to the other side of the fine filter module. A safe quick-release oil delivery pipeline module is connected between the coarse filter module and the fine filter module. The exhaust conversion valve module includes valve number one, valve number two, valve number three, flange, main connecting pipe and auxiliary connecting pipe; A flange is connected to one end of the main connecting pipe. A first valve and a second valve are fixedly installed on the main connecting pipe. A secondary connecting pipe is connected between the first valve and the second valve and located on one side of the main connecting pipe. A third valve is fixedly installed on the secondary connecting pipe.

[0006] Furthermore, the control box is equipped with a power control switch, an emergency stop button is installed on one side of the power control switch, and a display screen is installed on the other side of the power control switch. The control box is also compatible with an industrial-grade 2.4GHz wireless remote control.

[0007] Furthermore, both the coarse filter module and the fine filter module include a housing, a cover plate, and a base. The housing is a hollow tube made of metal. The bottom of the housing is fixedly connected to the top of the base. The top of the housing is fitted with a cover plate, and a hexagonal block is fixedly connected to the top surface of the cover plate. Both the coarse filter module and the fine filter module are provided with a filter element status monitoring unit. The filter element status monitoring unit includes a differential pressure sensor, a magnetic induction intensity attenuation detection module, and an audible and visual alarm.

[0008] Furthermore, a first filter element is fixedly connected to the bottom of the cover plate in the coarse filter module. The first filter element is a double-layer composite filter structure, with an outer layer of 100μm pore size stainless steel filter screen and an inner layer of a strong magnetic array with a magnetic induction intensity of 5000 Gauss.

[0009] Furthermore, the bottom of the cover plate in the fine filtration module is fixedly connected to a second filter element, a third filter element, and a fourth filter element, wherein the second filter element, the third filter element, and the fourth filter element are distributed in a gradient inside the outer shell. An integrated sensing unit is provided on the outer shell, which is located between the second filter element and the third filter element. The integrated sensing unit includes a high-precision temperature sensor, a trace moisture sensor, and a data acquisition and wireless transmission module. The data acquisition and wireless transmission module is embedded in the cover plate and is wirelessly connected to the control box.

[0010] Furthermore, the second filter element has a nano-glass fiber structure, the third filter element has a honeycomb activated carbon structure, and the fourth filter element has an ultra-thin strong magnetic sheet matrix with a 0.5mm spacing.

[0011] Furthermore, the safe quick-release oil pipeline module includes a third quick-connect plug, a fourth quick-connect plug, and an oil pipeline, wherein the third quick-connect plug and the fourth quick-connect plug are respectively connected through to both ends of the oil pipeline.

[0012] Furthermore, the outer wall of the oil pipeline is wrapped with a conductive layer, and one end of the conductive layer is fixedly connected to a grounding clamp. The conductive layer is made of copper braided material and has a grounding resistance value of ≤4Ω.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention integrates a drive pump, coarse filter module, fine filter module, and exhaust conversion valve module on the vehicle frame, along with a safe and quick-release oil pipeline module, to construct a modular integrated structure. This achieves an integrated purification and transmission architecture of "coarse filtration → fine filtration → exhaust flow control → electrostatic shielding → remote monitoring," which differs from traditional single oil injection / filtration separation equipment. It forms a closed-loop control technology system for the entire process, solving the industry pain points of traditional equipment such as "incomplete filtration, fragmented operation, and lack of safety assurance."

[0014] In this invention, the coarse filtration module adopts a dual-layer composite filtration structure. The outer layer is a 100μm pore size stainless steel filter screen (intercepting large particulate impurities), and the inner layer is a strong magnetic array with a magnetic induction intensity of 5000 Gauss (adsorbing 95% of fine iron filings). It also adopts a quick-release filter element design (no secondary pollution during replacement), which is different from the traditional non-magnetic, large-pore size (200-500μm), fixed filter screen design. At the same time, the fine filtration module adopts a three-layer gradient filtration structure for protection: the surface layer is nano-glass fiber (intercepting particles larger than 5μm), the middle layer is honeycomb activated carbon (adsorbing colloids and oxides), and the core layer is an ultra-thin strong magnetic sheet matrix with a spacing of 0.5mm (capturing micron-sized iron filings). This forms a two-stage purification of "physical interception → magnetic capture", which reduces the iron filings content of the oil from 50 microns / L to below 1 micron / L, breaking through the technical bottleneck that traditional single filter materials cannot achieve micron-level purification.

[0015] In the exhaust conversion valve module of this invention, valves No. 1, No. 2, and No. 3 are respectively structured as an oil drain valve, an exhaust valve, and a flow guide valve. By different combinations of valve states, for example: opening valves No. 1 and No. 3 and closing valve No. 2, an oil drain process is achieved; opening valves No. 2 and No. 3 and closing valve No. 1, an exhaust process is achieved; opening valves No. 1 and No. 2 and closing valve No. 3, an oil injection process is achieved, thereby maintaining an integrated operation of "oil drain-exhaust-oil injection" without the need to disassemble the equipment.

[0016] The safe and quick-release oil pipeline module of this invention uses an oil pipeline with a grounding device. A conductive layer is wrapped around the outer wall of the oil pipeline, and a grounding clamp is connected to one end of the conductive layer. The static electricity generated by the friction of oil transmission is eliminated by the principle of electrostatic shielding, which ensures the safe delivery of oil to the transformer oil tank. At the same time, the grounding resistance of the oil pipeline is ≤4Ω and the conductive layer is made of copper mesh braided material, which meets the industrial electrostatic protection standards and is different from the traditional ungrounded ordinary rubber / metal oil pipeline.

[0017] This invention simultaneously controls the electrical box with a 2.4GHz wireless remote controller (operating radius of 1 km), supporting one-button start / stop, emergency stop, and synchronous monitoring of oil level parameters, enabling single-person full-process operation and reducing the risk of working in high-risk areas. Furthermore, the invention features an encrypted signal transmission protocol between the remote controller and the equipment (to prevent interference), an emergency stop response delay (e.g., ≤1 second), and a real-time oil level parameter acquisition and display module (e.g., an LCD screen that refreshes the oil level in real time), overcoming the limitations of traditional manual on-site operation.

[0018] This invention incorporates an integrated real-time monitoring and feedback system for oil temperature and moisture content. An integrated sensing unit is located within the casing of the fine filtration module, between the second and third filter elements, enabling real-time and accurate monitoring of the temperature and trace moisture content of the filtered insulating oil. This unit wirelessly links with the control box. When abnormal oil temperature or excessive moisture content is detected, the system automatically adjusts the pump's delivery rate, intelligently switches the operating mode of the exhaust valve, and can activate the bypass valve in the quick-release oil pipeline module for oil recirculation and reprocessing. This not only represents a leap from "passive filtration" to "active monitoring and intelligent control," ensuring that the insulating oil injected into the transformer is always in optimal physical condition (e.g., stable temperature, extremely low moisture content), but also effectively prevents transformer insulation performance degradation, partial discharge, and even internal faults caused by oil deterioration, significantly improving the reliability of oil injection operations and the long-term operational safety of the transformer.

[0019] This invention innovatively introduces a modular filter cartridge status self-diagnosis and alert system, integrating filter cartridge status monitoring units into the cover plates of both the coarse and fine filter modules. This unit uses a differential pressure sensor to monitor the pressure difference across the filter cartridge in real time to determine the degree of clogging. A magnetic induction intensity attenuation detection module is specifically designed for magnetic filters (such as the strong magnetic array in the inner layer of the coarse filter and the strong magnetic sheet matrix in the fine filter) to quantitatively evaluate their adsorption efficiency. Monitoring data is fed back to the display screen of the control box in real time and can be alerted on-site via an audible and visual alarm. When any filter cartridge reaches a preset replacement or maintenance threshold, the system can issue a timely and accurate warning. This design not only transforms filter cartridge maintenance from "periodic experience-based replacement" to "precise maintenance based on actual conditions," avoiding the risk of secondary pollution caused by decreased filtration efficiency or filter failure due to overuse, but also fully utilizes the quick-release structure of the modules, enabling rapid and accurate maintenance operations. This significantly reduces the total lifecycle maintenance cost and unplanned downtime of the equipment, improving the intelligence and precision of operation and maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the exhaust conversion valve module of the present invention; Figure 3 This is a schematic diagram of the overall structure of the safe and quick-release oil pipeline module of the present invention; Figure 4 This is a partial cross-sectional view of the coarse filter module of the present invention. Figure 5 This is a partial cross-sectional view of the fine filtration module of the present invention.

[0021] In the picture: 100. Frame; 101. Casters; 102. Push-pull handle; 103. Support plate; 104. Control box; 1041. Power control switch; 1042. Emergency stop button; 1043. Display screen; 200. Coarse filter module; 201. First quick connector; 202. First filter element; 300. Fine filtration module; 301. Second quick-connect connector; 302. Second filter element; 303. Third filter element; 304. Fourth filter element; 400. Exhaust conversion valve module; 401. Valve No. 1; 402. Valve No. 2; 403. Valve No. 3; 404. Flange; 405. Main connecting pipe; 406. Secondary connecting pipe; 500. Safe quick-release oil pipeline module; 501. Third quick-connect plug; 502. Fourth quick-connect plug; 503. Oil pipeline; 504. Conductive layer; 5041. Grounding clamp; 600, drive pump; 700, pipeline; 800, housing; 900, cover plate; 901, hexagonal block; 1000, base.

[0022] 1100. Integrated sensing unit; 1101. High-precision temperature sensor; 1102. Trace moisture sensor; 1103. Data acquisition and wireless transmission module.

[0023] 1200, Filter element status monitoring unit; 1201, Differential pressure sensor; 1202, Magnetic induction intensity attenuation detection module; 1203, Audible and visual alarm. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-5 The present invention provides a transformer oil injection and filtration integrated machine with a composite filtration structure, including a frame 100, a coarse filter module 200, a fine filter module 300, an exhaust conversion valve module 400, and a safe quick-release oil pipeline module 500. Four casters 101 are fixedly installed at the bottom of the frame 100 for easy movement and transportation. A push-pull handle 102 is fixedly installed on the outer wall of one end of the frame 100 for manual operation. A support plate 103 is fixedly connected to the inner wall of the push-pull handle 102, and a control box 104 is fixedly installed on the support plate 103. The control box 104 is equipped with a power control switch 1041, an emergency stop button 1042 is installed on one side of the power control switch 1041, and a display screen 1043 is installed on the other side. The control box 104 is compatible with an industrial-grade 2.4GHz wireless remote control. This allows for single-person full-process operation through the 2.4GHz wireless remote control, one-button start / stop, emergency stop, and synchronous monitoring of oil level parameters, reducing the risk of working in high-risk areas. The remote control and equipment signal encryption transmission protocol (to prevent interference) and emergency stop response delay (e.g., ≤1) ensure efficient operation. The module for real-time acquisition and display of oil level parameters (such as an LCD screen that refreshes the oil level in real time) is not only highly efficient and convenient to operate, but also significantly reduces labor costs and operational complexity.

[0026] A drive pump 600 is fixedly installed on the frame 100. One side of the drive pump 600 is connected to a coarse filter module 200 through a pipe 700 to deliver insulating oil. The other side of the coarse filter module 200 is connected to a first quick connector 201. Both the coarse filter module 200 and the fine filter module 300 include a housing 800, a cover plate 900, and a base 1000. The housing 800 is a hollow tube made of metal. The bottom of the housing 800 is fixedly connected to the top of the base 1000. The top of the housing 800 is fitted with a cover plate 900, and a hexagonal block 901 is fixedly connected to the top end face of the cover plate 900. This not only facilitates disassembly and maintenance, further reducing maintenance costs, but also prevents secondary pollution. Secondly, the bottom of the cover plate 900 in the coarse filter module 200 is fixedly connected to the first filter element 202. The first filter element 202 is a double-layer composite filter structure. The outer layer is a stainless steel filter screen with a pore size of 100μm, and the inner layer is a strong magnetic array with a magnetic induction intensity of 5000 Gauss. This allows the outer filter screen to intercept large particles such as sand and fibers, while the inner strong magnetic array adsorbs 95% of fine iron filings, thus performing preliminary filtration treatment on the insulating oil.

[0027] On the other side of the drive pump 600, a fine filter module 300 is connected via a pipe 700. On the other side of the fine filter module 300, a second quick connector 301 is connected. At the same time, a second filter element 302, a third filter element 303, and a fourth filter element 304 are fixedly connected to the bottom of the cover plate 900 in the fine filter module 300. The second filter element 302, the third filter element 303, and the fourth filter element 304 are distributed in a gradient inside the outer shell 800. The second filter element 302 has a nano-glass fiber structure, the third filter element 303 has a honeycomb activated carbon structure, and the fourth filter element 304 is an ultra-thin strong magnetic sheet matrix with a spacing of 0.5 mm. In this way, the nano-glass fiber intercepts particles larger than 5 μm, the activated carbon adsorbs colloids and oxides in the insulating oil, and the strong magnetic sheet array precisely captures fine iron filings, ensuring that the iron filings content in the insulating oil is reduced to below 1 micron / L, forming a two-stage purification of "physical interception → magnetic capture".

[0028] A safe quick-release oil pipeline module 500 is connected between the coarse filter module 200 and the fine filter module 300. The safe quick-release oil pipeline module 500 includes a third quick connector 501, a fourth quick connector 502, and an oil pipeline 503. The third quick connector 501 and the fourth quick connector 502 are respectively connected through both ends of the oil pipeline 503. At the same time, a conductive layer 504 is wrapped on the outer wall of the oil pipeline 503. One end of the conductive layer 504 is fixedly connected to a grounding clamp 5041. The conductive layer 504 is made of copper braided material and has a grounding resistance value of ≤4Ω. The electrostatic shielding principle eliminates the risk of fire caused by static electricity during oil transmission, ensuring the safe delivery of oil to the transformer oil tank. Secondly, the quick-release joint design improves the convenience of operation and shortens the equipment installation and disassembly time.

[0029] The exhaust switching valve module 400 includes a first valve 401, a second valve 402, a third valve 403, a flange 404, a main connecting pipe 405, and a secondary connecting pipe 406. One end of the main connecting pipe 405 is connected to the flange 404. The first valve 401 and the second valve 402 are fixedly installed on the main connecting pipe 405. The secondary connecting pipe 406 is connected between the first valve 401 and the second valve 402 and located on one side of the main connecting pipe 405. The third valve 403 is fixedly installed on the secondary connecting pipe 406. Through the timing control logic of valve switching (such as automatically triggering the exhaust valve switching after oil discharge is completed, and synchronously starting the oil injection valve after the exhaust meets the standard), and the linkage mechanism between the valve and the oil transmission pressure (such as automatically closing the corresponding valve when the pressure is abnormal), the cumbersome and leakage problems of traditional manual valve replacement are solved.

[0030] An integrated sensing unit 1100 is added inside the outer casing 800 of the fine filtration module 300. This unit is located between the second filter element 302 and the third filter element 303 and is in direct contact with the oil. The sensing unit includes: a high-precision temperature sensor 1101, which monitors the temperature of the filtered insulating oil in real time; a trace moisture sensor 1102, which detects the moisture content in the oil in real time; and a data acquisition and wireless transmission module 1103, embedded in the cover plate 900, which is connected to the control box 104 via wired or wireless means. Functional linkage mechanism: The monitoring data is displayed on the display screen 1043 in real time and can be viewed remotely via a 2.4GHz wireless remote control. If abnormal oil temperature or excessive moisture is detected, the system can automatically trigger the following linkage responses: adjust the delivery rate of the drive pump 600 through the control box 104; link the exhaust conversion valve module 400 to automatically switch to "exhaust" or "circulation filtration" mode; and add an electrically controlled bypass valve to the safe quick-release oil pipeline module 500 to realize oil return and reprocessing.

[0031] Each of the coarse filtration module 200 and the fine filtration module 300 integrates a filter element status monitoring unit 1200 on its cover plate 900. This unit includes: a differential pressure sensor 1201, installed at the front and rear ends of the filter element to monitor its clogging status; a magnetic induction intensity decay detection module 1202 to monitor the real-time decay of the magnetic filter element's adsorption efficiency; and an audible and visual alarm 1203, located on the control box 104. Functional linkage mechanism: Monitoring data is transmitted to the control box 104 in real time, and the remaining service life or clogging status of each filter element is displayed on the display screen 1043. When a filter element reaches its replacement threshold, the system automatically prompts for replacement on the display screen; alarm information can be received via a wireless remote control; and a quick-release design (such as the hexagonal block 901) enables rapid positioning and replacement.

[0032] Working Principle: In use, the device is first moved to the designated working position using the casters 101 at the bottom of the frame 100. The push-pull handle 102 is used for positioning to ensure stable placement. The operator starts the device via the power control switch 1041 on the control box 104. At this time, the drive pump 600 starts working, drawing the insulating oil to be processed from the oil storage device and transporting it through the pipeline 700 to the coarse filter module 200. After entering the coarse filter module 200, the insulating oil first passes through the outer 100μm pore size stainless steel filter screen of the first filter element 202, intercepting large particles such as sand and fibers. It then enters the inner strong magnetic array area with a magnetic induction intensity of 5000 Gauss, adsorbing more than 95% of fine iron filings, completing the initial filtration. During this process, the filter element status monitoring unit 1200 on the coarse filter module cover plate 900 operates in real time: its differential pressure sensor 1201 monitors the pressure difference before and after the filter element, and the magnetic induction intensity decay detection module 1202 evaluates the decay of the adsorption efficiency of the strong magnetic array. Monitoring data is transmitted in real time to the display screen 1043 of the control box 104. If filter blockage is detected or the magnetic performance drops to a preset threshold, the audible and visual alarm 1203 will issue a warning, prompting maintenance personnel to replace or maintain the filter in a timely manner. The insulating oil after preliminary filtration enters the oil pipeline 503 through the third quick-connect plug 501 of the safety quick-release oil pipeline module 500. During the oil transportation process, the copper braided conductive layer 504 wrapped around the outer wall of the oil pipeline is connected to the ground through the grounding clamp 5041 to form an electrostatic shield, ensuring the safety of oil transportation and avoiding the risk of fire caused by static electricity. After the insulating oil is transported to the fine filtration module 300 via the oil delivery pipe 503, it sequentially passes through the nano-glass fiber structure of the second filter element 302 to intercept particles larger than 5μm; the honeycomb activated carbon structure of the third filter element 303 adsorbs colloids and oxides in the insulating oil; finally, it passes through the 0.5mm spacing ultra-thin strong magnetic sheet matrix of the fourth filter element 304 to precisely capture residual micron-sized iron filings, reducing the iron filings content in the insulating oil to below 1 micron / L, thus completing deep purification. The fine filtration module is also equipped with a filter element status monitoring unit 1200 to monitor and provide early warnings for the status of each grade of filter element.

[0033] During the fine filtration process, the integrated sensing unit 1100, located between the second filter element 302 and the third filter element 303, operates synchronously: its high-precision temperature sensor 1101 monitors the oil temperature in real time, and its trace moisture sensor 1102 detects the moisture content in the oil. The monitoring data is transmitted to the control box 104 via the data acquisition and wireless transmission module 1103. If abnormal oil temperature or excessive moisture is detected, the control system can automatically adjust the delivery rate of the drive pump 600, or switch the operating mode (such as starting the circulating filtration) by controlling the exhaust conversion valve module 400. If necessary, it can also link the bypass valve in the safety quick-release oil pipeline module 500 (if applicable) to allow the oil to flow back for reprocessing, ensuring the quality of the output oil.

[0034] During the filtration process, the exhaust conversion valve module 400 automatically switches its working state according to process requirements: when oil needs to be drained, valves 401 and 403 open, valve 402 closes, and insulating oil is discharged through the main connecting pipe 405 and the auxiliary connecting pipe 406; when venting is required, valves 402 and 403 open, valve 401 closes, and gas is discharged through the main connecting pipe 405; when oil needs to be injected, valves 401 and 402 open, valve 403 closes, and purified insulating oil is injected into the transformer oil tank through the main connecting pipe 405. Throughout the process, operators can remotely monitor and operate the equipment using an industrial-grade 2.4GHz wireless remote control, including one-button start / stop, emergency shutdown, and real-time viewing of oil level parameters. The equipment's encrypted signal transmission protocol ensures accurate execution of remote control commands, with an emergency shutdown response delay of ≤1 second. Oil level parameters are displayed in real-time on the LCD screen, enabling single-person full-process operation and significantly reducing the risk of working in high-risk areas.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer oil filling and filtration integrated machine with a composite filtration structure, characterized in that: It includes the vehicle frame (100), coarse filter module (200), fine filter module (300), exhaust conversion valve module (400) and safety quick-release oil pipeline module (500). Four casters (101) are fixedly installed at the bottom of the frame (100). A push-pull handle (102) is fixedly installed on the outer wall of one end of the frame (100). A support plate (103) is fixedly connected between the inner walls of the push-pull handle (102). A control box (104) is fixedly installed on the support plate (103). A drive pump (600) is fixedly installed on the frame (100). A coarse filter module (200) is connected to one side of the drive pump (600) through a pipe (700). A first quick connector (201) is connected to the other side of the coarse filter module (200). A fine filter module (300) is connected to the other side of the drive pump (600) through a pipe (700). A second quick connector (301) is connected to the other side of the fine filter module (300). A safe quick-release oil pipeline module (500) is connected between the coarse filter module (200) and the fine filter module (300). The exhaust conversion valve module (400) includes a first valve (401), a second valve (402), a third valve (403), a flange (404), a main connecting pipe (405), and a secondary connecting pipe (406). One end of the main connecting pipe (405) is connected to a flange (404). A first valve (401) and a second valve (402) are fixedly installed on the main connecting pipe (405). A secondary connecting pipe (406) is connected between the first valve (401) and the second valve (402) and located on one side of the main connecting pipe (405). A third valve (403) is fixedly installed on the secondary connecting pipe (406).

2. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 1, characterized in that: The control box (104) is equipped with a power control switch (1041), an emergency stop button (1042) is installed on one side of the power control switch (1041), and a display screen (1043) is installed on the other side of the power control switch (1041). The control box (104) is compatible with an industrial-grade 2.4GHz wireless remote controller.

3. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 2, characterized in that: Both the coarse filter module (200) and the fine filter module (300) include a housing (800), a cover plate (900), and a base (1000). The housing (800) is a hollow tube made of metal. The bottom of the housing (800) is fixedly connected to the top of the base (1000). The top of the housing (800) is fitted with a cover plate (900), and a hexagonal block (901) is fixedly connected to the top end face of the cover plate (900). Both the coarse filter module (200) and the fine filter module (300) are provided with a filter element status monitoring unit (1200). The filter element status monitoring unit (1200) includes a differential pressure sensor (1201), a magnetic induction intensity attenuation detection module (1202), and an audible and visual alarm (1203).

4. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 3, characterized in that: The cover plate (900) of the coarse filter module (200) is fixedly connected to the bottom of the first filter element (202). The first filter element (202) is a double-layer composite filter structure. The outer layer is a stainless steel filter screen with a pore size of 100μm, and the inner layer is a strong magnetic array with a magnetic induction intensity of 5000 Gauss.

5. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 4, characterized in that: The bottom of the cover plate (900) of the fine filtration module (300) is fixedly connected to a second filter element (302), a third filter element (303) and a fourth filter element (304). The second filter element (302), the third filter element (303) and the fourth filter element (304) are distributed in a gradient inside the outer shell (800). An integrated sensing unit (1100) is provided on the outer shell (800). The integrated sensing unit (1100) is located between the second filter element (302) and the third filter element (303). The integrated sensing unit (1100) includes a high-precision temperature sensor (1101), a trace moisture sensor (1102) and a data acquisition and wireless transmission module (1103). The data acquisition and wireless transmission module (1103) is embedded in the cover plate (900) and is wirelessly connected to the control box (104).

6. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 5, characterized in that: The second filter element (302) has a nano-glass fiber structure, the third filter element (303) has a honeycomb activated carbon structure, and the fourth filter element (304) has an ultra-thin strong magnetic sheet matrix with a spacing of 0.5 mm.

7. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 6, characterized in that: The safe quick-release oil pipeline module (500) includes a third quick-connect plug (501), a fourth quick-connect plug (502) and an oil pipeline (503), wherein the third quick-connect plug (501) and the fourth quick-connect plug (502) are respectively connected through to both ends of the oil pipeline (503).

8. The transformer oil injection and filtration integrated machine with a composite filtration structure according to claim 7, characterized in that: The outer wall of the oil pipeline (503) is wrapped with a conductive layer (504), and one end of the conductive layer (504) is fixedly connected to a grounding clamp (5041). The conductive layer (504) is made of copper braided material and has a grounding resistance value of ≤4Ω.

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