An oil injection device for transformer processing

Abstract

The application discloses an oil injection device for transformer processing and belongs to the field of oil injection for transformer processing. The device comprises a transformer body and a vacuum oil filter, and the transformer body and the vacuum oil filter are connected through an oil pipeline. The vacuum oil filter comprises an initial filter, a vacuum heating tank, a vacuum pump, a vacuum tank, an oil sprayer, a condenser, an oil discharge pump, a fine filter and an electric cabinet. The oil injection device further comprises an oil injection adjusting assembly arranged on the top of the transformer body and used in oil heat circulation work. Compared with the prior art, the oil injection adjusting assembly utilizes a spherical hinge type multi-degree-of-freedom adjusting structure and three groups of driving components to cooperatively act, so that the oil outlet port in the oil tank can be adjusted in space and pointed to any angle and the telescopic depth adjusting capacity is achieved. The hot oil is changed from passive injection to targeted active injection, so that the existing vortex area and flow "dead zone" are impacted by forced jet flow.

Description

Technical Field

[0001] This invention relates to the field of oil injection technology for transformer processing, specifically to an oil injection device for transformer processing. Background Technology

[0002] An oil-immersed transformer is a power transformer that uses insulating oil as the main insulating and cooling medium. Its core and windings are sealed inside a steel tank filled with transformer oil. During operation, the heat generated by the transformer is first transferred to the oil, and then dissipated to the tank walls and external radiators (or plate radiators) through the convection circulation of the oil, thereby achieving efficient cooling. This type of transformer has advantages such as good heat dissipation performance, low manufacturing cost, and strong overload capacity. It is widely used in outdoor power grid distribution and large substations. However, its disadvantages are that it has high requirements for fire protection and the environment, the oil needs to be inspected and maintained regularly, and there is a risk of pollution and fire if a leak occurs.

[0003] The core of oil-immersed transformer oil filling is the vacuum oil filling method, which involves continuously drawing a vacuum inside the transformer oil tank and slowly injecting high-quality insulating oil, which has been heated, degassed, and filtered by a vacuum oil filter, through the bottom valve.

[0004] However, the above-mentioned oil-immersed transformers still have the following defects when filling oil: In low-temperature environments, the problem of uneven oil temperature inside the transformer is amplified dramatically. Low temperatures cause the viscosity of the transformer oil to increase exponentially, and the oil's fluidity deteriorates significantly, making it even more difficult for the oil in the existing eddy current regions and flow "dead zones" to participate in circulation and exchange. At the same time, the specific heat capacity and thermal conductivity of the oil decrease, and the heat carried by the hot oil is lost more rapidly during transportation, resulting in a significant reduction in heating efficiency. More importantly, in low-temperature environments, the transformer's large metal structure dissipates heat extremely quickly, and a large amount of the heat output from the external oil filter heater is lost to the environment before entering the oil tank, making it difficult for the hot oil circulation system to establish and maintain an effective temperature rise in the oil tank. In addition, the heat accumulation inside the windings due to poor oil flow and the rapid heat dissipation in the external low-temperature environment create a sharp contradiction. Heat cannot be effectively transferred to the deep areas of the windings to remove moisture, while the surface areas face the risk of oil aging and insulation damage due to overheating, further aggravating the winding temperature gradient and local hot spot problems, which seriously restricts the installation quality and maintenance efficiency of transformers in extremely cold environments. Summary of the Invention

[0005] The purpose of this invention is to provide an oil injection device for transformer processing, so as to solve the problem in the prior art that the oil viscosity increases greatly due to low temperature, and the oil in the eddy current zone and flow dead zone is more difficult to participate in circulation and exchange.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: including a transformer body and a vacuum oil filter, the transformer body and the vacuum oil filter are connected by an oil pipeline, and the vacuum oil filter includes a primary filter, a vacuum heating tank, a vacuum pump, a vacuum tank, an oil injector, a condenser, an oil discharge pump, a fine filter and an electrical cabinet. The oil injection device also includes an oil injection adjustment component, which is located on the top of the transformer body. The oil injection adjustment component is used to perform hot oil circulation and removal processing at different three-dimensional spatial positions according to the oil in the eddy current region and flow dead zone inside the transformer body during oil thermal circulation.

[0007] Preferably, the oil injection adjustment assembly includes a base disposed on the top of the transformer body, with two threaded rods internally threadedly connected to the base, one end of each threaded rod being rotatably connected to a clamping block, and the clamping block being located inside the base.

[0008] Preferably, the oil filling port inside the transformer body is provided with a docking seat, the docking seat is provided with a sphere, the sphere is provided with an oil filling operator, the top of the sphere is fixedly connected to a fixed seat, the top of the fixed seat is fixedly connected to a second multi-stage electric telescopic rod, the output end of the second multi-stage electric telescopic rod is fixedly connected to a connecting plate, the inside of the connecting plate is fixedly connected to the outside of the oil filling operator, and the port of the oil filling operator is provided with a temperature sensor.

[0009] Preferably, a mounting bracket is bolted to the top of the base, a first motor is mounted on one side of the mounting bracket, a gear is fixedly connected to the output end of the first motor, a gear ring is meshed on one side of the gear, and the gear ring is located on the top of the base.

[0010] Preferably, a support frame is fixedly connected to the top of the gear ring, and rotating blocks are rotatably connected inside both the support frame and the fixed seat. A first multi-stage electric telescopic rod is provided between the two rotating blocks.

[0011] Preferably, the oil injection device further includes a foam breaking component, which is disposed inside the vacuum tank of the vacuum oil filter and is used to break up foam bubbles in the oil. The foam breaking component includes an inclined foam breaking guide plate that is fixedly connected to the inside of the vacuum oil filter. The inclined foam breaking guide plate has multiple stepped holes equidistantly opened inside.

[0012] Preferably, the through holes of the multiple ladder-shaped platforms are all funnel-shaped with a smaller upper opening and a larger lower opening.

[0013] Preferably, the oil injection device further includes a cleaning component, which is disposed inside the vacuum oil filter and is used to clean the oil deposits remaining after the oil foam and bubbles are broken. The cleaning assembly includes two conveyor rollers that are rotatably connected to the inside of the vacuum oil filter. A conveyor belt is provided between the outer sides of the two conveyor rollers, and multiple scrapers are fixedly connected at equal intervals to the outer side of the conveyor belt.

[0014] Preferably, the vacuum oil filter has two fixed connecting plates inside, and a collecting screen is connected between the two connecting plates. The collecting screen is installed inside the vacuum oil filter by bolts.

[0015] Preferably, the ends of the multiple scrapers away from the conveyor belt are provided with curved sections, the curvature of which is 5-10 degrees, for scraping off and driving the cleaning of oil stains.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention utilizes a ball-joint multi-degree-of-freedom adjustment structure and three sets of drive components in a coordinated action to enable the oil outlet port to achieve arbitrary angle adjustment and depth adjustment within the oil tank. This transforms passive injection of hot oil into targeted active injection, forcibly impacting existing vortex areas and flow "dead zones" with a jet. Simultaneously, the temperature sensor built into the oil outlet port can stop oil injection during the detection phase, and resume injection after adjusting the position. Detection can only be performed after the oil outlet port of the oil injection operator reaches thermal equilibrium with the surrounding oil. The system monitors the oil temperature in each area in real time and feeds it back to the control system before driving the oil outlet port to inject hot oil into areas below the oil temperature threshold. This solves the problem of existing hot oil circulation pipelines using fixed connection methods such as bottom oil outlet and top oil return, which leads to passive circulation of hot oil along a single path, long-term stagnation of oil in vortex areas and flow dead zones, and especially the problem of exponentially increasing oil viscosity at low temperatures, which drastically worsens the issue.

[0017] 2. This invention utilizes the synergistic effect of a foam breaking component and a cleaning component. The foam breaking component uses multiple trumpet-shaped trapezoidal holes with small upper openings and large lower openings on an inclined foam breaking guide plate to form a variable-diameter channel pre-foam breaking interface. When the oil containing air bubbles flows through the contraction-expansion variable-diameter section, the flow velocity and pressure change abruptly, and the bubble walls rupture due to stress imbalance. This effectively reduces the foam before a large amount of foam is generated, transforming the violent and concentrated flash release into a gentle and orderly step-by-step release. This avoids the accumulation of oil foam at the vacuum pump inlet, which could cause uncontrolled oil spraying. The array arrangement of the trapezoidal holes ensures that the remaining holes remain open even if any hole is blocked, ensuring the continuous reliability of the foam breaking function. The cleaning component utilizes the flow energy of the oil falling along the inclined defoaming guide plate to drive the conveyor belt and scraper to operate continuously. The curved part at the end of the scraper sweeps across the surface of the guide plate in sequence, scraping away viscous deposits and collecting them in the concave cavity of the curved part. After the scraper flips, the deposits fall into the collection screen and are discharged in a centralized manner. Online automatic cleaning of the defoaming guide surface can be achieved without an external power source. The operating speed is automatically matched with the oil flow rate, avoiding the reduction of flow area and increase of flow resistance caused by the accumulation of deposits. It also avoids the dual limitations of heating power and oil temperature resistance faced by simply relying on increasing oil temperature to reduce viscosity, thus extending the continuous operation cycle of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure of the foam breaking component and the cleaning component of the present invention; Figure 3 This is a schematic diagram of the movement trajectory of the cleaning component of the present invention; Figure 4 This is a schematic diagram of the structure of the docking plate and the collecting net cylinder of the present invention; Figure 5 This is a schematic diagram of the inclined foam-breaking guide plate of the present invention; Figure 6 This is a schematic diagram showing the position and structure of the oil injection adjustment component inside the transformer body of the present invention; Figure 7 This is a schematic diagram of the structure of the oil injection regulating component of the present invention; Figure 8 This is a partial structural schematic diagram of the oil injection regulating component of the present invention; Figure 9 This is a partial structural schematic diagram of the oil injection regulating component of the present invention; Figure 10 This is the present invention. Figure 9 A magnified structural diagram at point A; Figure 11 This is the present invention. Figure 4 A magnified structural diagram at point B; Figure 12 This is a schematic diagram of the horizontal tilt plane state of the first multi-stage electric telescopic rod adjusting oil injection operator of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Transformer body; 2. Vacuum oil filter; 3. Oil injection adjustment assembly; 31. Base; 32. Threaded rod; 33. Clamping block; 34. Gear ring; 35. Mounting bracket; 36. First motor; 37. Gear; 38. Support frame; 39. Rotating block; 310. First multi-stage electric telescopic rod; 311. Docking seat; 312. Sphere; 313. Fixed seat; 314. Second multi-stage electric telescopic rod; 315. Connecting plate; 316. Oil injection operator; 317. Temperature sensor; 4. Foam breaking assembly; 41. Inclined foam breaking guide plate; 42. Ladder platform hole; 5. Cleaning assembly; 51. Conveying roller; 52. Conveying belt; 53. Scraper; 54. Docking plate; 55. Collection screen. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] Example 1 Existing transformer oil injection devices still have the following problems in oil-heated circulation operation: In low-temperature environments, the viscosity of transformer oil increases exponentially, and its fluidity deteriorates, making it difficult for oil in eddy current and dead zones to participate in circulation; at the same time, the specific heat capacity and thermal conductivity of the oil decrease, the heat loss during hot oil transport intensifies, and the heating efficiency drops sharply. In addition, the transformer's metal structure dissipates heat extremely quickly, and a large amount of heat from the oil filter is dissipated before entering the oil tank, making it difficult to establish an effective temperature rise. Heat accumulates inside the windings due to poor oil flow, which creates a sharp contradiction with the rapid heat dissipation at low temperatures. This results in deep moisture that cannot be removed, while the surface layer faces the risk of oil aging and insulation damage due to overheating. The temperature gradient and local hot spot problems are significantly aggravated.

[0022] The core improvement of this embodiment lies in the following: by setting a three-dimensional adjustable oil injection structure at the oil injection port on the top of the transformer body 1, the oil injection port can be adjusted at any angle in three-dimensional space and the oil depth can be adjusted by external driving force inside the oil tank. The heated oil is changed from the traditional passive circulation to active targeted injection, and the oil stagnation state of the eddy zone and dead zone is directly broken by the forced jet, so that the trapped cold oil is forced to participate in the circulation and exchange. At the same time, by building a temperature sensing element in the oil injection port, the oil temperature information of different areas is obtained in real time after the oil injection work stops, and the hot oil injection position is adjusted accordingly to adjust the oil flow path in the oil tank.

[0023] like Figures 1 to 12As shown, in order to solve the above problems, this application discloses an oil injection device for transformer processing. The oil injection device includes a transformer body 1 and a vacuum oil filter 2. The transformer body 1 and the vacuum oil filter 2 are connected by an oil delivery pipeline. The vacuum oil filter 2 includes a primary filter, a vacuum heating tank, a vacuum pump, a vacuum tank, an oil injector, a condenser, an oil discharge pump, a fine filter, and an electrical cabinet. The transformer body 1 and the included equipment and instruments and the vacuum oil filter 2 are all prior art. The oil injection device also includes an oil injection adjustment component 3, which is located on the top of the transformer body 1. The oil injection adjustment component 3 is used to perform hot oil circulation treatment at different three-dimensional spatial positions according to the oil in the eddy current region and flow dead zone inside the transformer body 1 during oil hot circulation operation.

[0024] The oil filling adjustment assembly 3 includes a base 31 disposed on the top of the transformer body 1. Two threaded rods 32 are internally threaded onto the base 31. One end of each threaded rod 32 is rotatably connected to a clamping block 33, which is located inside the base 31. A mating seat 311 is provided at the oil filling port inside the transformer body 1. The threaded rods 32 drive the clamping block 33, allowing it to conform to the top of the transformer body 1 for positioning. This allows the oil filling adjustment assembly 3 to be installed at the oil filling port of the transformer body 1. The end face of the clamping block 33 is flat, with an arc-shaped opening on its inner side to ensure stable clamping according to the outer shape of the oil filling port of the transformer body 1. A ball 312 is disposed inside the mating seat 311. The device includes an oil filling actuator 316 that penetrates a sphere 312 and can move up and down within the sphere 312. A fixed base 313 is fixedly connected to the top of the sphere 312, and a second multi-stage electric telescopic rod 314 is fixedly connected to the top of the fixed base 313. A connecting plate 315 is fixedly connected to the output end of the second multi-stage electric telescopic rod 314, and the interior of the connecting plate 315 is fixedly connected to the exterior of the oil filling actuator 316. The oil filling actuator 316 is made of stainless steel to ensure a long service life. Driven by the second multi-stage electric telescopic rod 314, the oil filling actuator 316 extends and retracts along its own axis, adjusting the depth of the oil outlet port into the oil tank. A temperature sensor is installed inside the port of the oil filling actuator 316. 317. The detection probe of temperature sensor 317 collects oil temperature data at the location of the oil outlet in real time to determine whether the current injection area is a eddy current zone or a flow dead zone. Based on this, the pointing position of oil injection operator 316 is adjusted to guide hot oil to a low-temperature stagnant area, so as to force the jet to break the static state of the oil and allow the oil in this area to re-enter the circulation. When temperature sensor 317 is in use, the oil injection operation of oil injection operator 316 must be stopped to prevent hot oil from affecting the accuracy of the oil temperature value in transformer body 1 when passing through the end of oil injection operator 316. The top of base 31 is connected to mounting bracket 35 by bolts. A first motor 36 is installed on one side of mounting bracket 35. The output end of the first motor 36 is fixedly connected to gear 37. The engagement of wheel 37 and gear ring 34 changes the horizontal azimuth angle of the oil injection operator 316. One side of gear 37 is meshed with gear ring 34, which is located on the top of base 31. A support frame 38 is fixedly connected to the top of gear ring 34. Rotating blocks 39 are rotatably connected inside both support frame 38 and fixed base 313. A first multi-stage electric telescopic rod 310 is positioned between the two rotating blocks 39. The rotating block 39 within fixed base 313 is fixedly connected to the output end of the first multi-stage electric telescopic rod 310. The rotating block 39 within support frame 38 is fixedly connected to one side of the first multi-stage electric telescopic rod 310. The first multi-stage electric telescopic rod 310 drives ball 312 to swing around a horizontal axis, changing the pitch angle of the oil injection operator 316.Furthermore, the oil pipeline is equipped with an electromagnetic shut-off valve, which is electrically connected to the control system.

[0025] Working principle of oil injection regulating component 3: as follows Figure 1 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 12 As shown, during the hot oil circulation process, the vacuum oil filter 2 sends the heated insulating oil into the oil injection operator 316 through the oil pipeline. The hot oil flows along the internal channel of the oil injection operator 316 and is discharged into the transformer oil tank from the lower oil outlet port. After the first motor 36 is started, it drives the gear 37 to rotate. The gear 37 drives the gear ring 34 that meshes with it to rotate around the vertical axis. The support frame 38 fixedly connected to the gear ring 34, as well as the first multi-stage electric telescopic rod 310, fixed seat 313, ball 312 and oil injection operator 316 above the support frame 38, rotate as a whole, and the azimuth angle of the oil outlet port in the horizontal plane changes accordingly. When the first multi-stage electric telescopic rod 310 extends or retracts, its two ends push the support frame 38 and the fixed seat 313 respectively through the rotating block 39, causing the fixed seat 313 to move relative to the support frame 38. Since the fixed seat 313 is fixedly connected to the ball 312 and the ball 312 is constrained by the docking seat 311, the displacement of the fixed seat 313 drives the ball 312 to swing around the center of the ball in the docking seat 311. The angle between the axis of the oil injection operator 316 and the vertical direction changes accordingly, and the pitch angle of the oil outlet port is adjusted accordingly. When the second multi-stage electric telescopic rod 314 extends or retracts, its output end drives the connecting plate 315 to move up and down. The connecting plate 315 drives the oil injection operator 316 to slide along the axis of the ball 312. The position of the oil outlet port relative to the ball 312 changes, and the depth of the oil tank is changed accordingly. Furthermore, during the detection phase, temperature sensor 317 closes the solenoid shut-off valve on the oil pipeline through the control system, suspending oil supply to the oil injection operator 316. After the oil outlet of the oil injection operator 316 reaches thermal equilibrium with the surrounding oil, temperature sensor 317 begins to collect oil temperature data at that location. After data collection is complete, the control system opens the solenoid shut-off valve to resume oil injection and determines whether the spatial position of the oil injection operator 316 needs to be adjusted based on the temperature data. When the oil temperature in a certain area is detected to be lower than the threshold, temperature sensor 317 feeds back the detection information to the control system. The control system determines that the area is in a state of stagnant oil flow (i.e., an area with eddies and flow "dead zones"). The specific oil temperature threshold data depends on actual production parameters and operational detection. (Based on the data below), it then sends action commands to the first motor 36, the first multi-stage electric telescopic rod 310, and the second multi-stage electric telescopic rod 314 respectively. The three drive components work together to guide the oil outlet to the low-temperature area. The hot oil is discharged from the oil outlet at a certain flow rate to form a directional jet. The jet directly impacts the stagnant oil body, breaking its static state. The oil in this area begins to flow under the drive of the jet momentum and gradually participates in the overall circulation exchange. The heat carried by the hot oil diffuses to this area with the oil, causing the oil temperature in the stagnant area to gradually increase. If the temperature sensor 317 detects that the oil temperature in the area is higher than the threshold, it is a normal state of oil thermal circulation. Then, the temperature sensor 317 continues to move to continue to detect the oil temperature in other areas. After the hot oil removal process in a stagnant area is completed, the temperature sensor 317 continues to monitor the oil temperature in other areas of the oil tank. The control system continuously adjusts the spatial position of the oil outlet port according to the temperature distribution of each area, and performs hot oil removal processes on each eddy area and flow dead zone in sequence.

[0026] Example 2 It is understandable that the foaming problem in the vacuum oil filter 2 in Example 1 is not an isolated phenomenon. The root cause is that when the water content of the oil is high and the vacuum degree is high, the atomized oil releases a large amount of water vapor in a very short time. If the vaporization rate far exceeds the exhaust capacity of the vacuum pump, the gas cannot be extracted in time, and dense bubbles will form on the surface of the oil droplets and inside the liquid layer. After the bubbles rise and converge, they form a stable foam layer, which can cause uncontrolled oil spraying in severe cases.

[0027] The core improvement of this embodiment lies in setting a variable-diameter channel pre-foam separation interface between the atomizing spray area and the vacuum pump intake port. By utilizing the abrupt change in flow velocity and pressure when the oil flows through the contraction and expansion of the variable-diameter cross section, the bubble wall becomes unstable and ruptures due to force imbalance before the foam layer is formed. This transforms the violent and concentrated flash release into a gentle and orderly step-by-step release, thereby destroying the foundation for foam formation before a large amount of foam is generated. This avoids the problem of reduced dehydration efficiency caused by simply relying on passive methods such as reducing the vacuum degree or reducing the heating temperature.

[0028] like Figures 2 to 5 As shown, in order to solve the above problems, the device also includes a foam breaking component 4, which is installed inside the vacuum tank of the vacuum oil filter 2. The foam breaking component 4 is used to break the foam bubbles in the oil. The foam breaking component 4 includes an inclined foam breaking guide plate 41 fixedly connected to the inside of the vacuum oil filter 2. The inclined angle of the inclined foam breaking guide plate 41 is 15-45 degrees, which can ensure the smooth downward movement of the oil. The top surface of the inclined foam breaking guide plate 41 is sprayed with atomizing nozzles containing air bubbles. After the oil falls onto the plate surface, it flows in the inclined direction and flows through each stepped hole 42 in sequence. Multiple stepped holes 42 are equally spaced inside the inclined foam breaking guide plate 41. The stepped holes 42 have a funnel-shaped diameter change. The channel causes a sudden change in the flow velocity and pressure of the oil as it flows through, causing the bubble walls to rupture due to stress imbalance. This pre-foaming treatment is completed before a large amount of foam is generated, preventing bubbles from accumulating on the liquid surface and forming a foam layer. The multiple stepped holes 42 are all funnel-shaped with a small upper opening and a large lower opening. The funnel-shaped variable diameter channel can cause a sudden change in the flow velocity and pressure of the oil as it flows through, causing the bubble walls to rupture due to stress imbalance. This pre-foaming treatment is completed before a large amount of foam is generated, preventing bubbles from accumulating on the liquid surface and forming a foam layer.

[0029] The working principle of foam breaking component 4: Figure 2 , Figure 3 , Figure 4 and Figure 5 During the operation of the vacuum oil filter 2, the heated transformer oil is dispersed into fine oil droplets by the atomizing nozzle and sprayed into the vacuum tank. The oil droplets containing air bubbles fall onto the surface of the inclined foam-breaking guide plate 41 under the action of the oil guide plate, and then flow from top to bottom along the inclined plate surface under the action of gravity. When the oil flows to the position of the stepped hole 42, it enters the variable diameter channel. The upper opening of the stepped hole 42 is smaller. When the oil flows in, the flow cross-sectional area shrinks, the flow velocity increases and the pressure decreases. After flowing through the channel, it enters the lower large diameter area, where the flow cross-sectional area expands, the flow velocity decreases and the pressure rises. During the process of the oil flowing through this shrinking and expanding variable diameter section, the bubble wall is affected by the sudden changes in flow velocity and pressure. The wall tension balance is disrupted, the bubble bursts, and the gas entrained inside escapes. The escaped gas is extracted from the vacuum tank by the vacuum pump, and the broken oil continues to flow along the inclined plate surface, falling from the bottom of the plate surface into the oil collection area at the bottom of the vacuum tank, where it is extracted by the oil discharge pump. Some bubbles that do not break in time undergo the same diameter change action again when they enter the subsequent ladder hole 42 with the oil flow, until the bubbles completely break.

[0030] Example 3 Understandably, in Example 2, the subsequent problems caused by the low temperature environment still exist. Even if the pre-defoaming method controls the foam generation to a low level, the viscosity of the oil foam itself increases significantly under low temperature conditions. Its adhesion when flowing through the interception interface is much higher than that under normal temperature conditions. The residue after being intercepted and broken is very likely to form a viscous deposit layer on the guide surface and the surface of the separation element, and it will continue to accumulate and thicken over time, resulting in a reduction in the flow cross-sectional area, a continuous increase in flow resistance, and a gradual decline in separation efficiency until the equipment is forced to stop for manual cleaning.

[0031] The core improvement of this embodiment is that by using a continuously operating scraping component to continuously scrape the guide surface, the viscous deposits attached to the surface are actively removed. At the same time, the scraped deposits are transported to the collection area for centralized discharge through the directional receiving structure at the end of the scraping component along the circulation path, so as to realize the online automatic cleaning of the foam guide surface under the condition of continuous operation of the equipment.

[0032] like Figures 2 to 11 To solve the above problems, the device also includes a cleaning component 5, which is located inside the vacuum oil filter 2. The cleaning component 5 is used to clean the oil deposits that remain after the oil foam and bubbles are broken. The cleaning assembly 5 includes two conveying rollers 51 rotatably connected to the inside of the vacuum oil filter 2. A conveyor belt 52 is arranged between the outer sides of the two conveying rollers 51. Multiple scrapers 53 are fixedly connected at equal intervals to the outer side of the conveyor belt 52. Multiple scrapers 53 are fixedly installed at equal intervals on the outer surface of the conveyor belt 52. An oil guide plate (such as...) is provided at the internal spray port of the vacuum oil filter 2. Figure 2 This ensures that the oil falls onto the scraper 53 on the outside of the conveyor belt 52. The downward movement of the oil drives multiple scrapers 53 to move in coordination with the conveyor belt 52. Each scraper 53 extends along the width of the conveyor belt 52 and is equidistantly arranged along the direction of the conveyor belt 52's operation. Two docking plates 54 are fixedly connected inside the vacuum oil filter 2. A collection screen 55 is connected between the two docking plates 54. The collection screen 55 is bolted to the inside of the vacuum oil filter 2. When the scraped deposits move to the end of the conveyor belt 52 with the scraper 53, they detach from the scraper 53 during the flipping process and fall into the collection screen 55. The collection screen 55 is detachable and installable by bolt connection, making it convenient to remove and clean periodically. Multiple scrapers 53 have a curved part at the end away from the conveyor belt 52. The curvature of the curved part is 5-10 degrees, which is used to scrape and drive the cleaned oil. The curved part at the end of the scraper 53 away from the conveyor belt 52 bends in the direction of the conveyor belt 52's operation.

[0033] How cleaning component 5 works: Figure 2 , Figure 3 , Figure 4 and Figure 11When the vacuum oil filter 2 is running, the oil containing air bubbles is sprayed by the atomizing nozzle and then guided by the oil guide plate to fall onto the surface of the inclined foam-breaking guide plate 41. It flows from top to bottom along the inclined plate surface. When the oil flows past the scraper 53, it impacts the curved part at the end of the scraper 53, generating a thrust on the outer convex surface of the curved part, driving the scraper 53 to move along the direction of oil flow. Multiple scrapers 53 are impacted by the oil flow in sequence, pushing the conveyor belt 52 to continuously rotate around the two conveyor rollers 51.

[0034] When the conveyor belt 52 is running, the scraper 53 installed on its outer surface moves with the belt body. The scraper 53 located on the lower belt surface moves from the high end to the low end along the upper surface of the inclined defoaming guide plate 41. The curved part at the end of the scraper 53 contacts the plate surface and scoops up the viscous deposits adhering to the plate surface. The concave cavity formed by the bending of the curved part catches the deposits during the scraping process, preventing the deposits from slipping off the end of the scraper 53. After the scraper 53 passes the position of the drive roller, it turns from the lower belt surface to the upper belt surface, and the orientation of the scraper 53 is reversed. During the reversal, the deposits contained in the concave cavity of the curved part are separated from the scraper 53 under the action of gravity and centrifugal force and fall into the collection net cylinder 55 below. The scraper 53 on the upper belt surface continues to move with the conveyor belt 52, passes another conveyor roller 51 and then turns back into the lower belt surface, and comes into contact with the surface of the inclined defoaming guide plate 41 again, entering the next scraping stroke; the operating speed of the scraper 53 is determined by the oil flow rate, and the two are kept synchronized.

[0035] The collection screen 55 is fixed inside the vacuum tank by the docking plate 54, and the sediment accumulates in the collection screen 55. During cleaning, the operator unscrews the collection screen 55 from the docking plate 54, removes it, pours out the sediment, and then reinstalls it.

[0036] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. An oil injection device for transformer processing, characterized in that, The transformer body (1) and the vacuum oil filter (2) are connected by an oil pipeline. The vacuum oil filter (2) includes a primary filter, a vacuum heating tank, a vacuum pump, a vacuum tank, an oil injector, a condenser, an oil discharge pump, a fine filter, and an electrical cabinet. The oil injection device also includes an oil injection adjustment component (3), which is located on the top of the transformer body (1). The oil injection adjustment component (3) is used to perform hot oil circulation treatment at different three-dimensional spatial positions according to the oil in the eddy region and flow dead zone inside the transformer body (1) during oil-heat circulation operation.

2. The oil injection device for transformer processing as described in claim 1, characterized in that, The oil injection adjustment assembly (3) includes a base (31) disposed on the top of the transformer body (1). The base (31) has two threaded rods (32) internally threaded. One end of each threaded rod (32) is rotatably connected to a clamping block (33), and the clamping block (33) is located inside the base (31).

3. The oil injection device for transformer processing as described in claim 2, characterized in that, The transformer body (1) has an oil filling port with a docking seat (311). The docking seat (311) has a sphere (312) inside. The sphere (312) has an oil filling operator (316) inside. The top of the sphere (312) is fixedly connected to a fixed seat (313). The top of the fixed seat (313) is fixedly connected to a second multi-stage electric telescopic rod (314). The output end of the second multi-stage electric telescopic rod (314) is fixedly connected to a connecting plate (315). The inside of the connecting plate (315) is fixedly connected to the outside of the oil filling operator (316). The port of the oil filling operator (316) has a temperature sensor (317) inside.

4. The oil injection device for transformer processing as described in claim 2, characterized in that, The top of the base (31) is connected to a mounting bracket (35) by bolts. A first motor (36) is installed on one side of the mounting bracket (35). A gear (37) is fixedly connected to the output end of the first motor (36). A gear ring (34) is meshed on one side of the gear (37). The gear ring (34) is located on the top of the base (31).

5. The oil injection device for transformer processing as described in claim 4, characterized in that, The top of the gear ring (34) is fixedly connected to a support frame (38), and the support frame (38) and the fixed seat (313) are both rotatably connected to rotating blocks (39). A first multi-stage electric telescopic rod (310) is provided between the two rotating blocks (39).

6. The oil injection device for transformer processing as described in claim 1, characterized in that, The oil injection device also includes a foam breaking component (4), which is located inside the vacuum tank of the vacuum oil filter (2) and is used to break up oil foam bubbles. The foam breaking component (4) includes an inclined foam breaking guide plate (41) that is fixedly connected to the inside of the vacuum oil filter (2). The inclined foam breaking guide plate (41) has multiple stepped holes (42) equidistantly opened inside.

7. The oil injection device for transformer processing as described in claim 6, characterized in that, The through holes of the multiple ladder-shaped holes (42) are all small at the top and large at the bottom, forming a trumpet shape.

8. The oil injection device for transformer processing as described in claim 1, characterized in that, The oil injection device also includes a cleaning component (5), which is located inside the vacuum oil filter (2). The cleaning component (5) is used to clean the oil deposits that remain after the oil foam and bubbles are broken. The cleaning component (5) includes two conveying rollers (51) that are rotatably connected to the inside of the vacuum oil filter (2), and a conveyor belt (52) is provided between the outer sides of the two conveying rollers (51). Multiple scrapers (53) are fixedly connected at equal intervals to the outer side of the conveyor belt (52).

9. The oil injection device for transformer processing as described in claim 8, characterized in that, The vacuum oil filter (2) has two fixed connecting plates (54) inside, and a collection screen (55) is connected between the two connecting plates (54). The collection screen (55) is installed inside the vacuum oil filter (2) by bolts.

10. The oil injection device for transformer processing as described in claim 8, characterized in that, The scrapers (53) are provided with a curved section at one end away from the conveyor belt (52), the curvature of which is 5-10 degrees, for scraping off and driving the cleaning of oil stains.

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