Method and device for monitoring insulating oil level change of oil-immersed distribution transformer at high precision

Abstract

The invention discloses a method and device for high-precision monitoring of insulating oil level changes of an oil-immersed distribution transformer, and relates to the technical field of oil-immersed transformers, the device comprises a vertical pipe, a flange is fixedly connected to the outer side edge of the vertical pipe close to the bottom, a plurality of threaded holes are formed in the top of the flange, bolts are in threaded connection with the interiors of the threaded holes, and the bolts are in threaded connection with the vertical pipe. The device is installed at the center of the top of the transformer through a bolt, the floater and the floating plate are placed in the transformer, the floater and the floating plate are elastic and can be conveniently placed in the transformer, the movable ring is rotated, the movable ring drives the temperature sensor to move downwards through the external thread and the internal thread, and the temperature sensor is attached to the top of the transformer. And the floater and the floating plate float on the top of the insulating oil, when the insulating oil is reduced, the floater and the floating plate move downwards, the fan-shaped column moves downwards along with the floater and the floating plate, and the camera monitors the value of the downward movement of the fan-shaped column, so that the insulating oil is conveniently supplemented.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-immersed transformers, and particularly to a method and device for accurately monitoring the change of the insulating oil level of an oil-immersed distribution transformer. Background Art

[0002] Transformer oil is a petroleum-based liquid, which has the possibility of combustion and has disadvantages in terms of environmental protection. Due to the excellent performance and low price of transformer oil, the vast majority of power transformers still use transformer oil as the insulating and cooling medium.

[0003] However, there are some problems in the existing transformers during use. The insulating oil inside the existing transformers may leak during long-term operation, resulting in a reduction in the insulating oil inside the transformers. In the prior art, the monitoring device for the insulating oil inside the transformers usually uses color for display. When the insulating oil inside the transformer is normal, the monitoring device shows blue, and when the insulating oil inside the transformer decreases, the monitoring device shows red, so as to know that the insulating oil has decreased. Currently, this situation cannot more accurately indicate the number of milliliters of the missing insulating oil, which is not convenient for the operator to add the corresponding missing insulating oil. At the same time, it is not convenient to remotely monitor the display color of the monitoring device. Moreover, during the process of monitoring the insulating oil of the transformer, it is not convenient to monitor the temperature of the transformer, reducing the applicable range of the device. Summary of the Invention

[0004] Aiming at the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a method and device for accurately monitoring the change of the insulating oil level of an oil-immersed distribution transformer, realizing convenient installation of the device itself, more accurately displaying the change of the insulating oil, being able to remotely monitor the change of the insulating oil, and also being able to monitor the temperature of the transformer.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for accurately monitoring the change of the insulating oil level of an oil-immersed distribution transformer, comprising the following steps: Step 1: Adjust the installation position of the current oil-immersed transformer for the oil level gauge and install it at the center of the top of the oil-immersed transformer; Step 2: Monitor and display the insulating oil inside the oil-immersed transformer through more accurate numbers; Step 3: Drive the monitoring mechanism to move up and down through remote control of the telescopic mechanism, so as to be able to remotely observe the degree of change of the insulating oil; Step 4: When it is necessary to monitor the temperature on the surface of the oil-immersed transformer, attach the temperature detection mechanism to the surface of the oil-immersed transformer to enable subsequent temperature monitoring.

[0006] The present invention also provides another technical solution: a device for accurately monitoring the change of the insulating oil level of an oil-immersed distribution transformer, including a vertical pipe. A flange is fixedly connected to the outer edge of the vertical pipe near the bottom. A plurality of threaded holes are opened at the top of the flange, and bolts are threadedly connected in the threaded holes. Three observation slots are opened at the outer edge of the vertical pipe near the top, and transparent plates are fixedly connected in the observation slots. A pressure relief valve is installed at the top of the vertical pipe. Three fixing plates are fixedly connected to the outer edge of the vertical pipe near the top. Cylinders are fixedly connected to the bottoms of the fixing plates. The bottoms of the three cylinders are commonly fixedly connected to a ring, and the ring is sleeved on the outer edge of the vertical pipe. Three cameras are fixedly connected to the inner cavity side wall of the ring.

[0007] Preferably, three sector columns are provided near the top in the inner cavity of the vertical pipe. Connecting columns are fixedly connected to the bottoms of the sector columns. The connecting columns penetrate through the inner cavity of the vertical pipe at the bottom and are fixedly connected to a float. Float plates are fixedly connected to the outer edges of the float.

[0008] Preferably, an external thread is fixedly connected to the outer edge of the vertical pipe near the bottom. A movable ring is sleeved on the outer edge of the vertical pipe near the bottom. An internal thread is fixedly connected to the inner cavity side wall of the movable ring. The external thread and the internal thread are arranged to be threadedly connected to each other. A T-shaped annular groove is opened at the bottom of the movable ring, and three T-shaped blocks are movably connected in the T-shaped annular groove.

[0009] Preferably, support plates are fixedly connected to the bottoms of the T-shaped blocks. Movable plates are fixedly connected to the sides of the support plates away from the T-shaped blocks. Grooves are opened at the bottoms of the movable plates, and temperature sensors are fixedly connected in the grooves.

[0010] Preferably, two jacks are opened at the outer edges of the support plates. Two L-shaped plates are sleeved on the outer edges of the support plates. Plug rods are arranged in the jacks. One end of each plug rod is fixedly connected to the side of an adjacent L-shaped plate. Elastic rods are commonly fixedly connected between two adjacent L-shaped plates.

[0011] Preferably, scales are provided on the outer edges of the sector columns. A fixing ring is fixedly connected to the inner cavity side wall of the vertical pipe near the bottom, and the fixing ring is sleeved on the outer edges of the three connecting columns.

[0012] Compared with the prior art, the beneficial effects of the present invention are: Through the mutual cooperation among structures such as a sector column, a temperature sensor, a cylinder, a camera, etc., the device of the present invention can be installed at the center of the top of a transformer through bolts. A float and a floating plate are placed inside the transformer. The float and the floating plate are elastic, which is convenient for placing them inside the transformer. Rotate the movable ring, and the movable ring drives the temperature sensor to move downward through external threads and internal threads. The temperature sensor fits on the top of the transformer, thereby monitoring the temperature of the transformer. The float and the floating plate float on the top of the insulating oil. When the insulating oil decreases, the float and the floating plate move downward, and the sector column moves downward accordingly. The camera will monitor the value of the downward movement of the sector column, thereby facilitating the replenishment of the insulating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the present invention; Figure 2 is a front view of the present invention; Figure 3 is a bottom perspective view of the present invention; Figure 4 is a schematic cross-sectional structure view of the vertical pipe of the components of the present invention; Figure 5 is an exploded view of the present invention; Figure 6 is a schematic structure view of the vertical pipe of the components of the present invention; Figure 7 is an exploded view of the movable ring of the components of the present invention; Figure 8 is a schematic structure view of the movable ring of the components of the present invention; Figure 9 is a schematic structure view of the movable plate of the components of the present invention; Figure 10 is a schematic structure view of the temperature sensor of the components of the present invention; Figure 11 is a schematic structure view of the elastic rod of the components of the present invention; Figure 12 is a top view of the camera of the components of the present invention; Figure 13 is a schematic structure view of the sector column of the components of the present invention.

[0014] Reference numerals in the figures: 1, vertical pipe; 2, pressure relief valve; 3, movable plate; 4, ring; 5, cylinder; 6, floating plate; 7, transparent plate; 8, fixed ring; 9, sector column; 10, connecting column; 11, float; 12, external thread; 13, bolt; 14, flange; 15, support plate; 16, elastic rod; 17, movable ring; 18, T-shaped block; 19, temperature sensor; 20, L-shaped plate; 21, insertion rod; 22, camera; 23, scale; 24, internal thread; 25, fixing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Please refer toFigures 1-13 , the present invention provides a technical solution: Embodiment 1: A method for accurately monitoring the change of the insulating oil level of an oil-immersed distribution transformer, comprising the following steps: Step 1: Adjust the installation position of the current oil-immersed transformer for the oil level gauge and install it at the center of the top of the oil-immersed transformer; Step 2: Monitor and display the insulating oil inside the oil-immersed transformer through more accurate numbers; Step 3: Drive the monitoring mechanism to move up and down through a remote control telescopic mechanism, so as to remotely observe the degree of change of the insulating oil; Step 4: When it is necessary to monitor the temperature on the surface of the oil-immersed transformer, attach the temperature detection mechanism to the surface of the oil-immersed transformer to perform subsequent temperature monitoring.

[0016] Embodiment 2: A device for accurately monitoring the change of the insulating oil level of an oil-immersed distribution transformer, comprising a vertical pipe 1. A flange 14 is fixedly connected to the outer edge of the vertical pipe 1 near the bottom. A plurality of threaded holes are opened at the top of the flange 14, and bolts 13 are threadedly connected in the threaded holes. Three observation slots are opened at the outer edge of the vertical pipe 1 near the top, and transparent plates 7 are fixedly connected in the observation slots. A pressure relief valve 2 is installed at the top of the vertical pipe 1. Three fixing plates 25 are fixedly connected to the outer edge of the vertical pipe 1 near the top. Cylinders 5 are fixedly connected to the bottoms of the three fixing plates 25. A ring 4 is fixedly connected to the bottoms of the three cylinders 5 together. The ring 4 is sleeved on the outer edge of the vertical pipe 1. Three cameras 22 are fixedly connected to the inner cavity side wall of the ring 4. Three sector columns 9 are arranged near the top of the inner cavity of the vertical pipe 1. Connecting columns 10 are fixedly connected to the bottoms of the sector columns 9. The connecting columns 10 penetrate through the inner cavity of the vertical pipe 1 at the bottom and are fixedly connected to a float 11. Float plates 6 are fixedly connected to the outer edges of the float 11; An external thread 12 is fixedly connected to the outer edge of the vertical pipe 1 near the bottom. A movable ring 17 is sleeved on the outer edge of the vertical pipe 1 near the bottom. An internal thread 24 is fixedly connected to the inner side wall of the inner cavity of the movable ring 17. The external thread 12 and the internal thread 24 are arranged to be threadedly connected to each other. A T-shaped annular groove is formed at the bottom of the movable ring 17. Three T-shaped blocks 18 are movably connected in the T-shaped annular groove. Support plates 15 are fixedly connected to the bottoms of the T-shaped blocks 18. Movable plates 3 are fixedly connected to the sides of the support plates 15 away from the T-shaped blocks 18. Slots are formed at the bottoms of the movable plates 3. Temperature sensors 19 are fixedly connected in the slots. Two jacks are formed at the outer edges of the support plates 15. Two L-shaped plates 20 are sleeved on the outer edges of the support plates 15. Plug rods 21 are arranged in the jacks. One end of each plug rod 21 is fixedly connected to one side of the adjacent L-shaped plate 20. Elastic rods 16 are fixedly connected between the adjacent two L-shaped plates 20. Scales 23 are arranged on the outer edges of the sector columns 9. A fixed ring 8 is fixedly connected to the inner side wall of the inner cavity of the vertical pipe 1 near the bottom. The fixed ring 8 is sleeved on the outer edges of the three connecting columns 10; The device is installed at the center of the top of the transformer through bolts 13. The float 11 and the floating plate 6 are placed inside the transformer. The float 11 and the floating plate 6 are elastic, which is convenient for placing them inside the transformer. Rotate the movable ring 17. The movable ring 17 drives the temperature sensor 19 to move downward through the external thread 12 and the internal thread 24. The temperature sensor 19 is attached to the top of the transformer, thereby monitoring the temperature of the transformer. The float 11 and the floating plate 6 float on the top of the insulating oil. When the insulating oil decreases, the float 11 and the floating plate 6 move downward, and the sector column 9 moves downward accordingly. The camera 22 will monitor the value of the downward movement of the sector column 9, thereby facilitating the replenishment of the insulating oil.

[0017] Working principle: Before the transformer operates, first align the bottom end of the vertical pipe 1 with the hole at the top of the transformer. The vertical pipe 1 is installed on the top of the transformer through the flange 14 and the bolt 13. If conditions permit, during the manufacturing process of the transformer, the hole for installing the vertical pipe 1 can be selected to be opened at the center of the top of the transformer, which is more conducive to subsequent monitoring of the insulating oil. Then, place the float 11 and the floating plate 6 into the transformer through the hole. The float 11 and the floating plate 6 are elastic, which is more convenient for placing them inside the transformer. The float 11 and the floating plate 6 float on the surface of the insulating oil. At this time, the scale 23 on the sector column 9 connected by the connecting column 10 of the float 11 will remain unchanged. The pressure relief valve 2 can adjust the pressure inside the transformer. Then, rotate the movable ring 17. The movable ring 17 rotates on the surface of the external thread 12 through the internal thread 24. The movable ring 17 drives the support plate 15 and the movable plate 3 to move downward through the T-shaped block 18. The movable plate 3 drives the temperature sensor 19 to move downward until the temperature sensor 19 touches the surface of the transformer, and then stop rotating the movable ring 17. The distance between the movable plates 3 can be adjusted, compressing the elastic rod 16. Take out the L-shaped plate 20 and the insertion rod 21 from the inside of the support plate 15, and then rotate the support plate 15, the movable plate 3 and the T-shaped block 18. The movable plate 3 drives the temperature sensor 19 to move. After that, regularly monitor the change of the scale 23 on the sector column 9 through the camera 22. If the scale 23 on one of the sector columns 9 moves downward, while the scales 23 on the other two sector columns 9 do not change or move upward, it indicates that there is a problem in the installation of the transformer or this device, resulting in the tilting of the transformer or this device. If the scales 23 on all three sector columns 9 move downward, it indicates that the insulating oil inside the transformer has indeed decreased. The operator fills the required insulating oil according to the value of the downward movement of the scale 23 on the sector column 9. The temperature sensor 19 will monitor the temperature of the surface of the transformer.

Claims

1. A method for high-precision monitoring of insulating oil level changes in oil-immersed distribution transformers, comprising the following steps: Step 1: Adjust the installation position of the oil level gauge of the current oil-immersed transformer and install it at the top center of the oil-immersed transformer; Step 2: Monitor and display the insulating oil inside the oil-immersed transformer with more accurate numbers; Step 3: The monitoring mechanism is driven to move up and down by remotely controlling the telescopic mechanism, so that the degree of change of the insulating oil can be observed remotely; Step 4: When it is necessary to monitor the temperature of the surface of the oil-immersed transformer, the temperature detection mechanism is attached to the surface of the oil-immersed transformer to perform subsequent temperature monitoring.

2. A device for high-precision monitoring of insulating oil level changes in an oil-immersed distribution transformer, comprising a vertical pipe (1), characterized in that: A flange (14) is fixedly connected to the outer edge of the vertical tube (1) near the bottom, and a plurality of threaded holes are provided at the top of the flange (14), in which bolts (13) are threadedly connected. Three observation slots are provided at the outer edge of the vertical tube (1) near the top, in which transparent plates (7) are fixedly connected. A pressure release valve (2) is installed at the top of the vertical tube (1). Three fixing plates (25) are fixedly connected to the outer edge of the vertical tube (1) near the top, and the bottoms of the fixing plates (25) are fixedly connected to cylinders (5). The bottom ends of the three cylinders (5) are fixedly connected to a circular ring (4) in common, and the circular ring (4) is sleeved on the outer edge of the vertical tube (1). The inner cavity side wall of the circular ring (4) is fixedly connected to three cameras (22).

3. The device for high-precision monitoring of insulating oil level changes of oil-immersed distribution transformers according to claim 2 is characterized in that: Three fan-shaped columns (9) are provided near the top of the inner cavity of the vertical tube (1), and the bottom ends of the fan-shaped columns (9) are fixedly connected to connecting columns (10). The bottom ends of the connecting columns (10) penetrate the inner cavity of the vertical tube (1) and are fixedly connected to floats (11), and the outer edges of the floats (11) are fixedly connected to floating plates (6).

4. The device for high-precision monitoring of insulating oil level changes of oil-immersed distribution transformers according to claim 2 is characterized in that: An external thread (12) is fixedly connected to the outer edge of the vertical tube (1) near the bottom, a movable ring (17) is sleeved on the outer edge of the vertical tube (1) near the bottom, an internal thread (24) is fixedly connected to the inner cavity side wall of the movable ring (17), the external thread (12) and the internal thread (24) are mutually threadedly connected, a T-shaped annular groove is opened at the bottom of the movable ring (17), and three T-shaped blocks (18) are movably connected in the T-shaped annular groove.

5. The device for high-precision monitoring of insulating oil level changes of oil-immersed distribution transformers according to claim 4 is characterized in that: The bottom of the T-shaped block (18) is fixedly connected to a support plate (15), and the side of the support plate (15) away from the T-shaped block (18) is fixedly connected to a movable plate (3), and the bottom of the movable plate (3) is provided with a slot, and a temperature sensor (19) is fixedly connected in the slot.

6. The device for high-precision monitoring of insulating oil level changes of oil-immersed distribution transformers according to claim 5 is characterized in that: Two insertion holes are provided on the outer edge of the support plate (15), two L-shaped plates (20) are sleeved on the outer edge of the support plate (15), an insertion rod (21) is provided in each of the insertion holes, one end of the insertion rod (21) is fixedly connected to one side of an adjacent L-shaped plate (20), and an elastic rod (16) is fixedly connected between two adjacent L-shaped plates (20).

7. The device for high-precision monitoring of insulating oil level changes of oil-immersed distribution transformers according to claim 3 is characterized in that: The outer edges of the sector-shaped columns (9) are all provided with scales (23), and a fixing ring (8) is fixedly connected to the inner cavity side wall of the vertical tube (1) near the bottom, and the fixing ring (8) is sleeved on the outer edges of the three connecting columns (10).

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