A detection and cleaning device for transformer bushings

Abstract

The application discloses a kind of detection cleaning equipment of transformer bushing, including machine body, cleaning cavity is opened in the inside of the machine body, two vertical passages are opened in the inside of the machine body, two vertical driving tracks are mounted in the inside of two vertical passages, and two vertical driving tracks in the inside of the same vertical passage are movably installed with moving block respectively.The invention is now rotatable during cleaning and drying by rotating the clamping base and cooperating with the positioning clamping base to flexibly position the transformer bushing, which can be rotated during cleaning and drying, realizes overall cleaning, improves cleaning efficiency, and increases the accuracy of detection by using the centrifugal principle during detection, improves the accuracy of slight leakage detection, realizes integrated operation of cleaning, flushing and drying, reduces the structure cost and device size, facilitates the equipment loading and unloading maintenance, reduces the use cost and realizes the equipment integration and miniaturization.

Description

Technical Field

[0001] This invention relates to the field of transformer bushing cleaning technology, and more specifically to a transformer bushing inspection and cleaning device. Background Technology

[0002] Transformer bushings are the main insulation devices outside the transformer tank. The leads of the transformer windings must pass through the insulating bushings to insulate between the leads and between the leads and the transformer casing, while also fixing the leads in place. Depending on the voltage level, insulating bushings come in various forms, including pure porcelain bushings, oil-filled bushings, and capacitor bushings. Pure porcelain bushings are mostly used in transformers of 10kV and below. They consist of a conductive copper rod inserted inside the porcelain bushing, with air insulation inside. Oil-filled bushings are mostly used in 35kV transformers. They consist of an oil-filled porcelain bushing with a conductive copper rod inside, wrapped with insulating paper. Transformer bushings are exposed to air and subjected to prolonged sun and rain. On the one hand, damage to the bushing can lead to complete bushing breakdown, requiring immediate replacement. On the other hand, dirt on the surface of the porcelain bushing can absorb moisture, reducing insulation. This not only easily causes surface discharge but may also increase leakage current, leading to flashover discharge and damage to the porcelain surface. This is a significant factor in insulation breakdown, therefore, timely inspection and cleaning of transformer bushings are essential.

[0003] For example, application number 202010313494.4 describes a transformer bushing inspection and cleaning device, comprising a working pulley, a bushing support, and a transformer bushing disposed within the bushing support. A feed box is fixedly provided on the outside of the working pulley, and a feed chamber is fixedly provided in the feed box. The feed chamber stores untested bushing supports. A linkage electromagnet is fixedly provided on the outside of the working pulley belt, and a fixed bracket is fixedly provided on the left side of the working pulley. After placing the transformer bushing in the designated position of this invention, the invention can perform damage detection and oil leakage detection on the transformer bushing. At the same time, the invention also includes a cleaning mechanism that can clean the inspected transformer bushing, realizing simultaneous inspection and cleaning of the transformer bushing, improving the service life of the transformer bushing, and saving costs.

[0004] However, existing technical solutions are expensive due to the large size and complexity of the equipment. The large size also occupies a large installation area, increasing the cost of loading, unloading and maintenance. In addition, the entire equipment has a long operating path, which makes cleaning time-consuming and inefficient. Furthermore, due to minor leaks in some parts of the equipment, the oil may not be able to seep out under the lack of pressure during static testing, which can easily lead to inaccurate detection. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a transformer bushing inspection and cleaning device to solve the above-mentioned background technical problems.

[0006] To achieve this objective, the present invention adopts the following technical solution.

[0007] A transformer bushing inspection and cleaning device includes a body with a cleaning chamber inside. The body has two vertical channels, each with two vertical drive rails. Moving blocks are movably mounted on the two vertical drive rails within the same vertical channel. Rotating and positioning brackets are rotatably mounted on each of the moving blocks, with the rotating and positioning brackets symmetrically distributed on both sides. A transformer bushing body is engaged between the positioning and rotating brackets. A brushing assembly is installed inside the cleaning chamber. Flushing assemblies are installed on both sides of the body, communicating with the interior of the two vertical channels. A drying assembly is installed on the back of the body, communicating with the interior of the two vertical channels. A drive mechanism is installed on the top of the body, connecting and cooperating with the two rotating brackets. Two arc-shaped covers are slidably connected to the body, with detachable smooth inspection plates inserted into the bottom of the two arc-shaped covers.

[0008] As a further description of the above technical solution: the brushing assembly includes a drive motor, a transmission shaft and two brush rollers. The drive motor is fixedly installed on the right side of the machine body. The output end of the drive motor is fixedly connected to the transmission shaft through a coupling. The other end of the transmission shaft is inserted into the interior of the cleaning chamber. The interiors of the two brush rollers are fixedly connected to the transmission shaft. The two brush rollers are respectively located directly below the two vertical channels.

[0009] As a further description of the above technical solution: the flushing assembly includes a water storage tank, a booster pump, and a nozzle assembly. The water storage tank is fixedly installed on the side of the machine body, the booster pump is fixedly installed on the back side of the water storage tank, the input end of the booster pump is connected to the interior of the water storage tank, the nozzle assembly is fixedly installed inside the vertical channel, and the output end of the booster pump is connected and fixed to the nozzle assembly through a pipe.

[0010] As a further description of the above technical solution: the air drying assembly includes a hot air blower and two sets of high-pressure nozzles. The hot air blower is fixedly installed on the back of the machine body, and the two high-pressure nozzles are respectively fixedly installed inside the two vertical channels. The output end of the hot air blower is connected and fixed to the two high-pressure nozzles through two pipes respectively.

[0011] As a further description of the above technical solution: two cleaning scrapers are fixedly connected to the top of the machine body, and the tops of the two cleaning scrapers respectively contact and cooperate with two smooth detection plates.

[0012] As a further description of the above technical solution: the drive mechanism includes a dual-head motor, two transmission rods, two friction wheels, and two friction rings. The dual-head motor is fixedly installed on the machine body. The two output ends of the dual-head motor are respectively fixedly connected to the two transmission rods through couplings. The other ends of the two transmission rods are respectively fixedly connected to the two friction wheels. The two friction rings are respectively fixedly connected to the outer sides of the two rotating brackets. The outer sides of the friction wheels are in contact with the friction rings.

[0013] As a further description of the above technical solution: a switch valve is fixedly installed on the left side of the machine body, and the switch valve is connected to the interior of the cleaning chamber.

[0014] As a further description of the above technical solution: brush strips arranged at equal intervals are installed on the outer side of the brush roller, and the brush strips are fitted with the transformer bushing body with a clearance fit.

[0015] Compared with the prior art, the advantages of this invention are:

[0016] This solution, through integrated design, realizes integrated operation of cleaning, rinsing, drying and testing, reduces structural costs and device size, facilitates equipment loading, unloading and maintenance, reduces operating costs and achieves equipment integration and miniaturization.

[0017] This solution uses a rotating bracket in conjunction with a positioning bracket to flexibly position the transformer bushing, allowing it to rotate during cleaning and drying for thorough cleaning and improved cleaning efficiency. Simultaneously, the rotation utilizes centrifugal force during inspection to increase accuracy and enhance the precision of detecting minor leaks. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of section A in the middle;

[0020] Figure 3 This is a structural schematic diagram of the invention in frontal cross-section;

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of the B-structure;

[0022] Figure 5 This is a top view of the structure of the present invention.

[0023] Figure 6 This is a partial side view cross-sectional structural schematic diagram of the present invention.

[0024] Explanation of the labels in the diagram:

[0025] 1. Machine body; 2. Cleaning chamber; 3. Vertical channel; 4. Vertical drive rail; 5. Moving block; 6. Rotating bracket; 7. Positioning bracket; 8. Transformer bushing body; 9. Brushing assembly; 91. Drive motor; 92. Transmission shaft; 93. Brush roller; 931. Brush strip; 10. Flushing assembly; 101. Water tank; 102. Booster pump; 103. Nozzle assembly; 11. Drying assembly; 111. Hot air blower; 112. High-pressure nozzle; 12. Drive mechanism; 121. Dual-head motor; 122. Transmission rod; 123. Friction wheel; 124. Friction ring; 13. Arc-shaped cover; 14. Smooth detection plate; 15. Cleaning scraper; 16. Switch valve. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Please see Figures 1-6 In this invention: a transformer bushing inspection and cleaning device includes a body 1, with a cleaning chamber 2 inside the body 1. Two vertical channels 3 are formed inside the body 1, and two vertical drive rails 4 are installed inside each of the two vertical drive rails 3. Moving blocks 5 are movably mounted on the two vertical drive rails 4 inside the same vertical channel 3. Rotating brackets 6 and positioning brackets 7 are rotatably mounted on the two moving blocks 5. The rotating brackets 6 and positioning brackets 7 are symmetrically distributed on both sides. A transformer bushing is engaged between the positioning bracket 7 and the rotating bracket 6. The main body 8 of the casing has a brushing assembly 9 installed inside the cleaning chamber 2. Both sides of the machine body 1 are equipped with flushing assemblies 10, which are connected to the interior of two vertical channels 3 respectively. The back of the machine body 1 is equipped with a drying assembly 11, which is connected to the interior of two vertical channels 3. The top of the machine body 1 is equipped with a drive mechanism 12, which is connected to two rotating brackets 6. Two arc-shaped covers 13 are slidably connected to the machine body 1, and a detachable smooth detection plate 14 is inserted into the bottom of the two arc-shaped covers 13.

[0028] In this invention, the main body 1 serves as the device body. First, the cleaning liquid is injected into the cleaning chamber 2. Then, one end of the transformer bushing body 8 is inserted into the rotating bracket 6, and the other end is inserted into the positioning bracket 7. Next, two vertical drive rails 4 are activated to synchronously drive two moving blocks 5 to move vertically, causing the transformer bushing body 8 to move downwards until it enters the cleaning chamber 2 and is immersed in the cleaning liquid. At this point, the bottom of the transformer bushing body 8 contacts the cleaning liquid. Then, the brushing assembly 9 is activated to brush the two transformer bushing bodies 8 in the cleaning liquid. During brushing, due to the fixed... Both the positioning bracket 7 and the rotating bracket 6 can rotate on the moving block 5. While the brushing assembly 9 is brushing the transformer bushing body 8, it simultaneously pushes the transformer bushing body 8 to rotate, achieving a thorough cleaning. After cleaning, the vertical drive rail 4 is activated to lift the moving block 5, raising the transformer bushing body 8 to the output position of the flushing assembly 10. The flushing assembly 10 then starts flushing and cleaning the transformer bushing body 8. During flushing, the water flow impact force pushes the transformer bushing body 8 to rotate, ensuring thorough flushing. After flushing is complete, the vertical drive rail 4 is activated again to continue flushing the transformer bushing body 8. The assembly continues to rise and stops at the output position of the drying component 11. Then, the drying component 11 is activated to quickly dry the transformer bushing body 8, achieving comprehensive drying in the same way as above. After drying, the vertical drive rail 4 is activated to drive the transformer bushing body 8 to the highest position. At this time, the drive mechanism 12 is activated to drive the two rotating brackets 6 to rotate, so as to drive the transformer bushing body 8 to rotate at a constant speed, and pull the two arc-shaped covers 13 relative to each other to cover the transformer bushing body 8. Under the action of centrifugal force, if there is a leak in the transformer bushing body 8, the oil at the leak point will be thrown out by centrifugal force and splashed onto the surface. On the smooth detection plate 14, the presence and amount of splashed oil stains on the smooth detection plate 14 are observed to detect whether there is leakage in the main body 8 of the transformer bushing and whether the leakage is serious. This is comprehensive and convenient. The device has the advantages of high integration, miniaturization, and high efficiency in operation at the cleaning path end, which improves the cleaning efficiency. It solves the problems of existing technical solutions, such as large and complex equipment, high equipment cost, large installation area, increased installation and maintenance costs, long running path, long cleaning time, and poor efficiency.

[0029] Please see Figure 3 The washing assembly 9 includes a drive motor 91, a transmission shaft 92, and two brush rollers 93. The drive motor 91 is fixedly installed on the right side of the machine body 1. The output end of the drive motor 91 is fixedly connected to the transmission shaft 92 through a coupling. The other end of the transmission shaft 92 is inserted into the interior of the washing chamber 2. The interiors of the two brush rollers 93 are fixedly connected to the transmission shaft 92. The two brush rollers 93 are located directly below the two vertical channels 3.

[0030] In this invention, the drive motor 91 is started to drive the transmission shaft 92 to rotate, and the transmission shaft 92 drives the brush roller 93 to rotate, so as to brush the surface of the transformer bushing body 8 and drive it to rotate, thereby achieving a thorough brushing.

[0031] Please see Figure 3 and Figure 5 The flushing assembly 10 includes a water tank 101, a booster pump 102, and a nozzle assembly 103. The water tank 101 is fixedly installed on the side of the body 1, the booster pump 102 is fixedly installed on the back side of the water tank 101, the input end of the booster pump 102 is connected to the inside of the water tank 101, the nozzle assembly 103 is fixedly installed inside the vertical channel 3, and the output end of the booster pump 102 is connected to the nozzle assembly 103 through a pipe.

[0032] In this invention, the booster pump 102 is activated to extract clean water from the water storage tank 101 and spray it through the nozzle assembly 103 to rinse the washed transformer bushing body 8, cleaning away the residual cleaning liquid and impurities on its surface. Furthermore, by setting the position of the horizontal axis of the transformer bushing body 8 to be lower than the horizontal height of the nozzle assembly 103 when it stops, the thrust generated by the nozzle assembly 103 during rinsing pushes the transformer bushing body 8 to rotate, achieving thorough rinsing.

[0033] Please see Figure 3 and Figure 5 The air drying component 11 includes a hot air blower 111 and two sets of high-pressure nozzles 112. The hot air blower 111 is fixedly installed on the back of the body 1, and the two high-pressure nozzles 112 are fixedly installed inside the two vertical channels 3 respectively. The output end of the hot air blower 111 is connected to the two high-pressure nozzles 112 through two pipes respectively.

[0034] In this invention, the hot air blower 111 is activated to achieve high-temperature air drying through two sets of high-pressure nozzles 112. The height is set in the same way as the above principle, so that the airflow drives the transformer bushing body 8 to rotate, thereby achieving comprehensive and efficient drying, reducing cleaning time and improving efficiency.

[0035] Please see Figure 1 and Figure 5 The top of the body 1 is fixedly connected to two cleaning scrapers 15, and the tops of the two cleaning scrapers 15 respectively contact and cooperate with the two smooth detection plates 14.

[0036] In this invention, two cleaning scrapers 15 are used to remove oil stains splashed on the rotating transformer bushing body 8 after the arc-shaped cover 13 drives the smooth detection plate 14 to detect it and then slides back to its original position, making it easy to reuse.

[0037] Please see Figure 2 and Figure 3The drive mechanism 12 includes a dual-head motor 121, two transmission rods 122, two friction wheels 123, and two friction rings 124. The dual-head motor 121 is fixedly mounted on the machine body 1. The two output ends of the dual-head motor 121 are fixedly connected to the two transmission rods 122 through couplings. The other ends of the two transmission rods 122 are fixedly connected to the two friction wheels 123. The two friction rings 124 are fixedly connected to the outer sides of the two rotating brackets 6. The outer sides of the friction wheels 123 are in contact with the friction rings 124.

[0038] In this invention, the dual-head motor 121 is started to drive the two transmission rods 122 to rotate, which in turn drives the two friction wheels 123 to rotate. When the rotating bracket 6 reaches the top position, the friction ring 124 contacts the two friction wheels 123 respectively, realizing power transmission to drive the two rotating brackets 6 to rotate, thereby driving the transformer bushing body 8 to rotate at high speed. Under the action of centrifugal force, even minor leakage points can be accurately detected and judged to determine whether there is leakage, and the detection results are more accurate.

[0039] Please see Figure 3 The switch valve 16 is fixedly installed on the left side of the machine body 1, and the switch valve 16 is connected to the interior of the cleaning chamber 2.

[0040] In this invention, the cleaning fluid inside the cleaning chamber 2 can be easily drained and replaced by the switch valve 16, which facilitates operation.

[0041] Please see Figure 3 Among them, brush strips 931 arranged at equal intervals are installed on the outer side of the brush roller 93, and the brush strips 931 are fitted with the transformer bushing body 8 with clearance.

[0042] In this invention, the brush strip 931 is fitted with the transformer bushing body 8 with a gap to ensure that the brush roller 93 can more thoroughly clean the surface of the transformer bushing body 8.

[0043] The above description represents a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A detection and cleaning apparatus for transformer bushings, comprising a machine body (1), characterized in that: The inside of the machine body (1) is provided with a cleaning cavity (2), the inside of the machine body (1) is provided with two vertical channels (3), two vertical driving rails (4) are installed in the inside of the two vertical channels (3), two movable blocks (5) are movably installed on the two vertical driving rails (4) in the same vertical channel (3), a rotating clamping seat (6) and a positioning clamping seat (7) are rotatably installed on the two movable blocks (5), the rotating clamping seats (6) and the positioning clamping seats (7) on both sides are symmetrically distributed, a transformer sleeve body (8) is clamped between the positioning clamping seat (7) and the rotating clamping seat (6), a brushing assembly (9) is installed in the cleaning cavity (2), a flushing assembly (10) is installed on both sides of the machine body (1), two flushing assemblies (10) are respectively communicated with the inside of the two vertical channels (3), a air-drying assembly (11) is installed on the back of the machine body (1), the air-drying assembly (11) is communicated with the inside of the two vertical channels (3), a driving mechanism (12) is installed on the top of the machine body (1), the driving mechanism (12) is connected with the two rotating clamping seats (6), two arc-shaped covers (13) are slidably connected to the machine body (1), and a detachable smooth detection plate (14) is inserted into the bottom of the two arc-shaped covers (13); the brushing assembly (9) comprises a driving motor (91), a transmission shaft (92) and two brush rollers (93), the driving motor (91) is fixedly installed to the right side of the machine body (1), the output end of the driving motor (91) is fixedly connected with the transmission shaft (92) through a shaft coupling, the other end of the transmission shaft (92) is inserted into the inside of the cleaning cavity (2), the inside of the two brush rollers (93) is fixedly connected with the transmission shaft (92), and the two brush rollers (93) are located below the two vertical channels (3) respectively; the flushing assembly (10) comprises a water storage tank (101), a booster pump (102) and a spray head group (103), the water storage tank (101) is fixedly installed to the side of the machine body (1), the booster pump (102) is fixedly installed to the back side of the water storage tank (101), the input end of the booster pump (102) is communicated with the inside of the water storage tank (101), and the spray head group (103) is fixedly installed to the inside of the vertical channel (3).

2. The transformer bushing inspection and cleaning apparatus of claim 1, wherein: The air-drying assembly (11) comprises a hot air machine (111) and two groups of high-pressure nozzles (112), the hot air machine (111) is fixedly installed to the back of the machine body (1), the two high-pressure nozzles (112) are fixedly installed to the inside of the two vertical channels (3) respectively, and the output end of the hot air machine (111) is fixedly communicated with the two high-pressure nozzles (112) through two pipes respectively.

3. The transformer bushing inspection and cleaning apparatus of claim 1, wherein: Two cleaning scrapers (15) are fixedly connected to the top of the machine body (1), and the top of the two cleaning scrapers (15) is in contact with the two smooth detection plates (14) respectively.

4. The apparatus for detecting and cleaning the transformer bushing according to claim 1, wherein: The driving mechanism (12) comprises a double-head motor (121), two transmission rods (122), two friction wheels (123) and two friction rings (124), the double-head motor (121) is fixedly installed on the machine body (1), two output ends of the double-head motor (121) are fixedly connected with the two transmission rods (122) through couplings respectively, the other ends of the two transmission rods (122) are fixedly connected with the two friction wheels (123) respectively, the two friction rings (124) are fixedly connected to the outer sides of the two rotating clamping bases (6) respectively, and the outer side of the friction wheel (123) is in contact with the friction ring (124).

5. The apparatus for detecting and cleaning the transformer bushing according to claim 1, wherein: A switch valve (16) is fixedly installed on the left side of the machine body (1) and communicates with the inside of the cleaning cavity (2).

6. The apparatus for detecting and cleaning a transformer bushing according to claim 1, wherein: The outer side of the brush roller (93) is provided with brush strips (931) arranged at equal distances, and the brush strips (931) are in gap cooperation with the transformer bush body (8).

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