Insulating oil sampling device for vacuum on-load tap-changer

Abstract

The embodiment of the utility model provides a vacuum on-load tap-changer insulating oil sampling device, and relates to the technical field of transformers. The vacuum on-load tap-changer insulating oil sampling device comprises a transformer pipe opening, a first flange plate is installed at the bottom end of the transformer pipe opening, a sampling assembly is arranged on the surface of the first flange plate, the sampling assembly comprises a second flange plate, a sealing gasket is installed at the top of the second flange plate, and the sealing gasket is arranged on the surface of the first flange plate. The bottom of the second flange plate is fixedly connected with a connecting block, the bottom of the connecting block is fixedly connected with a sampling port, through the arrangement of the sampling assembly, insulating oil can be efficiently extracted from the transformer and safely stored, and the time of the whole sampling process can be remarkably shortened. Through the improvement, the working efficiency is greatly improved, the waiting time of operators is shortened, the labor cost is reduced, and in addition, the sampling assembly avoids the condition of liquid backflow in the sampling process.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a vacuum on-load tap changer insulating oil sampling device. Background Technology

[0002] With the continuous development of the power grid and the upgrading of equipment, oil-immersed vacuum on-load tap changers have gradually entered the power industry. Although vacuum on-load tap changers have stronger technical advantages, they can also have quality problems, leading to failures. Moreover, these failures are more concealed and sudden, and if they are not detected and handled in a timely and effective manner, they will cause serious consequences.

[0003] On-load tap changers allow adjustment of the transformer's output voltage by changing the tap position during transformer operation. Vacuum on-load tap changers rely on vacuum tubes for arc extinguishing, replacing the arc contacts of oil-immersed tap changers. This allows arc extinguishing to occur within the vacuum tube, thus protecting the tap changer's insulating oil and overall insulation.

[0004] Existing methods for sampling insulating oil often rely on simple tools, such as basins or storage tubes, which are directly connected to the transformer's inlet for sampling. However, this traditional method has several shortcomings: First, during operation, the lack of effective sealing and control measures makes it easy for insulating oil to splash, causing environmental pollution; second, this method requires operators to wait for the insulating oil to flow out naturally, which is not only inefficient but also increases labor costs and time consumption; third, because the sampling flow rate and speed cannot be precisely controlled, the sampling results may be inaccurate, affecting subsequent analysis and making it inconvenient to use. Utility Model Content

[0005] The purpose of this utility model is to provide a vacuum on-load tap changer insulating oil sampling device, which can avoid the problems of traditional insulating oil sampling methods, such as easy splashing and environmental pollution, low efficiency, high cost, and inaccurate sampling due to difficulty in accurately controlling flow and speed, which are caused by using simple tools to directly connect to the transformer pipe.

[0006] This utility model provides a vacuum on-load tap changer insulating oil sampling device, including a transformer port. A first flange is installed at the bottom of the transformer port. A sampling component is provided on the surface of the first flange. The sampling component includes a second flange. A sealing gasket is installed on the top of the second flange. A connecting block is fixedly connected to the bottom of the second flange. A sampling port is fixedly connected to the bottom of the connecting block. A sampling valve cover is threadedly connected to the outer surface of the connecting block. A sampling valve inner cover is installed in the inner cavity of the sampling valve cover, which contacts the surface of the sampling port. A first sampling hose is connected to the inner cavity of the transformer port.

[0007] In one specific implementation, an installation box is mounted on the outer surface of the first sampling tube, and three sealing gaskets are fixedly connected to the inner cavity of the installation box.

[0008] In one specific implementation, a first sampling tube, a second sampling tube, and a third sampling tube are respectively fixedly connected to the surfaces of three sealing gaskets, and a storage test bottle is installed at the bottom end of the second sampling tube.

[0009] In one specific implementation, one end of the third sampling tube is connected to a sampling needle, and a rotating rod is provided through the inner cavity of the mounting box, with a rotating block fixedly connected to one end of the rotating rod.

[0010] In one specific implementation, the surface of the rotating block has three through cavities in sequence, and the surface of the mounting box is fixedly connected to a fixing box.

[0011] In one specific implementation, a plurality of return springs are fixedly connected to the inner cavity of the fixed box, and a toothed disc is slidably connected to the inner cavity of the fixed box.

[0012] In one specific implementation, one end of the return spring is fixedly connected to the surface of the toothed disc, and one end of the rotating rod extends through to the outside of the fixed box.

[0013] In one specific implementation, a gear that meshes with a toothed disc is fixedly connected to the surface of the rotating rod, and a telescopic rod is fixedly connected to the surface of the fixed box.

[0014] In one specific implementation, a locking rod is fixedly connected to the surface of the toothed disc, and one end of the locking rod extends through to the outside of the fixed box.

[0015] In one specific implementation, the surface of the locking rod is provided with a locking hole for use with the telescopic rod.

[0016] The beneficial effects of this application are as follows: By configuring the sampling component, not only can insulating oil be efficiently extracted from the transformer and safely stored, but the entire sampling process time can also be significantly shortened. This improvement greatly enhances work efficiency, reduces operator waiting time, and lowers labor costs. Furthermore, the sampling component prevents liquid backflow during sampling, ensuring sampling accuracy and environmental safety, and avoiding the liquid splashing and contamination problems common in traditional methods. Simultaneously, the automated or semi-automated functions simplify operation, further enhancing the convenience and reliability of sampling, and providing strong support for the maintenance of power equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of the first flange and the second flange in the assembly state according to an embodiment of the present utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the disassembled structure of the connecting block and the sampling valve cover of this utility model embodiment;

[0021] Figure 4 This is a three-dimensional side view sectional view of the mounting box structure according to an embodiment of the present utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the rotating block structure according to an embodiment of the present utility model;

[0023] Figure 6 This is a three-dimensional side view sectional view of the fixed box structure according to an embodiment of the present utility model;

[0024] Figure 7 This is a three-dimensional schematic diagram of the assembled toothed disc and gear structure according to an embodiment of the present utility model;

[0025] Figure 8 This is a three-dimensional schematic diagram of the toothed disc and gear structure in a disassembled state according to an embodiment of the present utility model;

[0026] Figure 9 This is a side sectional view of the telescopic rod structure according to an embodiment of the present invention.

[0027] Icons: 1. Transformer port; 11. First flange; 2. Sampling assembly; 21. Second flange; 22. Sealing gasket; 23. Connecting block; 24. Sampling port; 25. Sampling valve outer cover; 26. Sampling valve inner cover; 27. First sampling hose; 28. Mounting box; 29. ​​Second sampling hose; 210. Storage bottle; 211. Sampling needle; 212. Rotating rod; 213. Rotating block; 214. Through cavity; 215. Sealing gasket; 216. Fixing box; 217. Gear plate; 218. Return spring; 219. Gear; 220. Telescopic rod; 221. Locking rod; 222. Locking hole; 223. Third sampling hose. Detailed Implementation

[0028] Traditional methods for sampling insulating oil suffer from several drawbacks due to the use of simple tools directly connected to transformer inlets. These methods are prone to splashing and environmental pollution, are inefficient, costly, and suffer from inaccurate sampling due to difficulty in precisely controlling flow and speed. Therefore, the inventors have developed a vacuum on-load tap changer insulating oil sampling device. Through the design of the sampling components, this device not only efficiently extracts and safely stores transformer insulating oil, significantly shortening sampling time, improving work efficiency, and reducing labor costs, but also prevents liquid backflow and splashing, ensuring sampling accuracy and environmental safety. Furthermore, the automation function enhances the convenience and reliability of operation, thus overcoming the aforementioned shortcomings.

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please refer to Figures 1 to 9 This utility model provides a vacuum on-load tap changer insulating oil sampling device, including a transformer port 1. A first flange 11 is installed at the bottom of the transformer port 1. The transformer port 1 is the outlet of the insulating oil pipeline installed on the surface of the transformer. A sampling component 2 is provided on the surface of the first flange 11. The sampling component 2 includes a second flange 21, wherein the second flange 21 is threadedly connected to the first flange 11 by bolts. The dimensions of the second flange 21 are: thickness 10mm, outer diameter 110mm, hole center distance 85mm, hole diameter 14mm, and center opening with M16 internal thread. A sealing gasket 22 is installed on the top of the second flange 21, and the top of the sealing gasket 22 is connected to the first flange 11. The bottom of the two flanges are in contact with each other to achieve a sealing effect and prevent leakage during oil sampling. The bottom of the second flange 21 is fixedly connected to a connecting block 23, wherein the outer surface of the connecting block 23 is provided with an external thread, and the bottom of the connecting block 23 is fixedly connected to a sampling port 24. The sampling port 24 and the center of the inner cavity of the connecting block 23 are evenly provided with an open structure, which facilitates the user to sample oil through the open structure. The outer surface of the connecting block 23 is threadedly connected to a sampling valve cover 25, wherein the inner cavity of the sampling valve cover 25 is provided with an internal thread that matches the external thread, and the inner cavity of the sampling valve cover 25 is equipped with a sampling valve inner cover 26 that contacts the surface of the sampling port 24. The inner cavity of the transformer pipe port 1 is connected to a first sampling hose 27.

[0031] Please refer to Figures 2 to 9An installation box 28 is mounted on the outer surface of the first sampling hose 27. Three sealing gaskets 215 are fixedly connected to the inner cavity of the installation box 28. The surfaces of the three sealing gaskets 215 are respectively fixedly connected to the first sampling hose 27, the second sampling hose 29, and the third sampling hose 223. One side of each sealing gasket 215 has an opening to facilitate the communication of insulating oil, and the surface of the sealing gasket 215 has an arc shape. A storage bottle 210 is installed at the bottom of the second sampling hose 29, and the bottom of the second sampling hose 29 extends into the storage bottle 210 to facilitate the storage of extracted insulating oil. One end of the third sampling hose 223 is connected to a sampling needle 211. A rotating rod 2 is installed through the inner cavity of the installation box 28. 12. A rotating block 213 is fixedly connected to one end of the rotating rod 212. The area of ​​the rotating rod 212 in contact with the mounting box 28 is sealed to prevent oil leakage. Three through cavities 214 are sequentially opened on the surface of the rotating block 213. The three through cavities 214 are located at the top and left and right sides of the rotating block 213, respectively. The sealed area at the bottom of the rotating block 213 is in contact with the second sampling hose 29. A fixed box 216 is fixedly connected to the surface of the mounting box 28. The fixed box 216 is made of transparent glass to facilitate the user's observation of the internal structure of the fixed box 216. Several return springs 218 are fixedly connected to the inner cavity of the fixed box 216. A toothed disc 217 is slidably connected to the inner cavity of the fixed box 216.

[0032] Please refer to Figures 3 to 9 One end of the return spring 218 is fixedly connected to the surface of the toothed disc 217, one end of the rotating rod 212 extends to the outside of the fixed box 216, and a gear 219 that meshes with the toothed disc 217 is fixedly connected to the surface of the rotating rod 212. A telescopic rod 220 is fixedly connected to the surface of the fixed box 216. Figure 9 As shown, the telescopic rod 220 includes a rod, a spring is fixedly connected to the inner cavity of the rod, a base plate is slidably connected to the inner cavity of the rod, one end of the spring is fixedly connected to the base plate, a positioning rod is fixedly connected to the surface of the base plate, and one end of the positioning rod extends through to the outside of the rod. A locking rod 221 is fixedly connected to the surface of the toothed disc 217, and one end of the locking rod 221 extends through to the outside of the fixed box 216. A locking hole 222 is opened on the surface of the locking rod 221 to cooperate with the telescopic rod 220, and the locking hole 222 cooperates with the positioning rod.

[0033] Specifically, during the extraction of insulating oil, the insulating oil first flows into the rotating block 213 through the first sampling hose 27, then from the rotating block 213 into the third sampling hose 223, and finally into the sampling needle 211. When it is necessary to introduce insulating oil into the sampling needle 211, the operator needs to pull the positioning rod on the telescopic rod 220 upwards, and at the same time manually pull the toothed disc 217 away from the gear 219. This action will stretch the return spring 218. After the positioning rod cooperates with the locking hole 222 to achieve the locking function, the user can manually twist the rotating rod 212 to rotate the rotating block 213, which in turn drives the through cavity 214 to rotate to the position above the second sampling hose 29.

[0034] During this process, the non-porous portion at the bottom of the rotating block 213 rotates to the direction of the first sampling tube 27, effectively blocking the first sampling tube 27 and preventing liquid backflow. After completing the above steps, the user pushes the sampling needle 211 to allow the liquid to flow through the second sampling tube 29 into the storage bottle 210 for sampling and storage, ensuring that the operation is simple, safe, and efficient.

[0035] In summary, the working principle of a vacuum on-load tap changer insulating oil sampling device according to this utility model embodiment is as follows: After the user first secures the second flange 21 to the first flange 11 with bolts, the user manually connects the first sampling hose 27 to the sampling port 24. Then, the user manually pulls the sampling needle 211, which draws the liquid from the transformer port 1 through the sampling assembly 2 into the first sampling hose 27. The liquid then flows through the first sampling hose 27 into the third sampling hose 223 and the sampling needle 211. At this time, the user manually rotates and blocks the position of the first sampling hose 27. Then, the user manually pushes the sampling needle 211 to draw the liquid through the second sampling hose 29 into the storage test bottle 210 for storage, which is convenient for use.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum on-load tap changer insulation oil sampling device comprising a transformer nozzle (1), characterized in that, The bottom end of the transformer pipe mouth (1) is provided with a first flange plate (11), the surface of the first flange plate (11) is provided with a sampling assembly (2), the sampling assembly (2) comprises a second flange plate (21), the top of the second flange plate (21) is provided with a sealing gasket (22), the bottom of the second flange plate (21) is fixedly connected with a connecting block (23), the bottom of the connecting block (23) is fixedly connected with a sampling port (24), the outer surface of the connecting block (23) is threadedly connected with a sampling valve outer cover (25), the inner cavity of the sampling valve outer cover (25) is provided with a sampling valve inner cover (26) in surface contact with the sampling port (24), and the inner cavity of the transformer pipe mouth (1) is communicated with a first sampling hose (27).

2. The vacuum on-load tap changer insulation oil sampling device of claim 1, wherein, The outer surface of the first sampling hose (27) is provided with a mounting box (28), and the inner cavity of the mounting box (28) is fixedly connected with three sealing gaskets (215).

3. The vacuum on-load tap changer insulation oil sampling device of claim 2, wherein, The surfaces of the three sealing gaskets (215) are respectively fixedly connected with a first sampling hose (27), a second sampling hose (29) and a third sampling hose (223), and the bottom end of the second sampling hose (29) is provided with a storage test bottle (210).

4. The vacuum on-load tap changer insulation oil sampling device of claim 3, wherein, One end of the third sampling hose (223) is connected with a sampling needle tube (211), the inner cavity of the mounting box (28) is provided with a rotating rod (212) penetrating through, one end of the rotating rod (212) is fixedly connected with a rotating block (213).

5. The vacuum on-load tap changer insulation oil sampling device of claim 4, wherein, The surface of the rotating block (213) is sequentially provided with three penetrating cavities (214), and the surface of the mounting box (28) is fixedly connected with a fixing box (216).

6. The vacuum on-load tap changer insulation oil sampling device of claim 5, wherein, The inner cavity of the fixing box (216) is fixedly connected with a plurality of reset springs (218), and the inner cavity of the fixing box (216) is slidably connected with a toothed disc (217).

7. The vacuum on-load tap changer insulation oil sampling device of claim 6, wherein, One end of the reset spring (218) is fixedly connected with the surface of the toothed disc (217), and one end of the rotating rod (212) penetrates to the outside of the fixing box (216).

8. The vacuum on-load tap changer insulation oil sampling device of claim 7, wherein, The surface of the rotating rod (212) is fixedly connected with a gear (219) engaged with the toothed disc (217), and the surface of the fixing box (216) is fixedly connected with an extension rod (220).

9. The vacuum on-load tap changer insulation oil sampling device of claim 8, wherein, The surface of the toothed disc (217) is fixedly connected with a locking rod (221), and one end of the locking rod (221) penetrates to the outside of the fixing box (216).

10. The vacuum on-load tap changer insulation oil sampling device of claim 9, wherein, The surface of the locking rod (221) is provided with a locking hole (222) matched with the extension rod (220).

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