A main transformer piping oil extraction system and method

Abstract

This invention relates to an oil extraction system and method for main transformer pipelines, used for extracting oil from main transformer pipelines. It includes an oil line connecting pipe with one end connected to the main transformer pipeline, an oil storage tank connected to the other end of the oil line connecting pipe, a one-way check valve mounted on the oil line connecting pipe, an oil extraction device mounted on the oil storage tank and connected to the bottom of the oil storage tank, an exhaust device mounted on the upper end of the oil storage tank, and an oil discharge device mounted on the side wall of the oil storage tank. In use, the upper and lower adjustment handles are turned to bring the upper and lower rubber flaps into close contact with the intermediate plate of the two-way valve, closing the two-way check valve, and closing the exhaust valve and oil discharge valve. The one-way valve adjustment handle is then turned to bring the rubber flap of the one-way valve into close contact with the intermediate plate of the one-way valve, closing the one-way check valve, thus completing the initial setup.

Description

Technical Field

[0001] This invention relates to an oil extraction system and method for a main transformer pipeline. Background Technology

[0002] The existing main transformer oil sampling pipeline tools do not have anti-backflow valves. Especially when sampling oil from 35kV transformers, long-term operation of the equipment can easily cause internal low pressure. During routine oil sampling, if no backflow prevention function is set, there is a high risk that air will be sucked back into the transformer, which can seriously reduce the internal insulation of the transformer and lead to a discharge accident.

[0003] Existing document CN202110327984.4 discloses a method for detecting the status of a backflow valve, comprising the following steps: hardware topology connection, adding an electromagnetic reset device to the backflow valve of a fan, and connecting a BMC to the electromagnetic reset device, the fan, and the backflow valve respectively; the BMC detects the fan speed signal and controls the electromagnetic reset device; when the server supplies power to the fan and the BMC detects the speed signal, the backflow valve status is detected, and a first fault is determined based on the detection result, and the first fault is reported to the server based on the determination result; when the power supply to the server is interrupted, the backflow valve status is detected, and a second fault is determined based on the detection result, and the second fault is reported to the server based on the determination result; this invention detects the status of the backflow valve, thereby determining whether a fault has occurred, further determining the cause of the fault, and performing maintenance actions as early as possible to ensure normal server operation and improve server stability.

[0004] Existing document CN201810248390.2 discloses a venous blood sample collection anti-backflow valve device and a blood collection needle device, relating to the field of medical device technology. The blood collection needle device provided by this invention includes a venous blood collection needle, a tubing puncture needle, and a connecting part connecting the venous blood collection needle and the tubing puncture needle. The connecting part is equipped with a venous blood sample collection anti-backflow valve device. The anti-backflow valve device includes: a first connecting seat with a through hole in the middle, an elastic anti-backflow valve installed on the first connecting seat, and a second connecting seat that cooperates with the first connecting seat to form a cavity accommodating the elastic anti-backflow valve. The second connecting seat is engaged with the first connecting seat. The second connecting seat has a through hole communicating with the outside, effectively preventing the collected blood from flowing back into the body, avoiding contaminated blood from entering the body and causing harm. Furthermore, it eliminates the need for aseptic treatment of the entire blood collection container, saving costs.

[0005] The above two methods cannot remove the gas in the syringe, and cannot solve the problem of gas bubbles in the syringe affecting the experimental results. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a main transformer pipeline oil extraction system and method for removing gas from a syringe.

[0007] The present invention adopts the following technical solution:

[0008] This invention is used to extract oil from the main transformer pipeline, including an oil circuit connecting pipe with one end connected to the main transformer pipeline, an oil storage tank connected to the other end of the oil circuit connecting pipe, a one-way check valve installed on the oil circuit connecting pipe, an oil extraction device installed on the oil storage tank and connected to the bottom of the oil storage tank, an exhaust device installed at the top of the oil storage tank, and an oil discharge device installed on the side wall of the oil storage tank.

[0009] The one-way check valve of the present invention includes a one-way valve intermediate layer plate fixedly disposed inside the oil circuit connecting pipe, eight one-way valve elliptical through holes disposed on the one-way valve intermediate layer plate and distributed around the center of the one-way valve intermediate layer plate, a one-way valve guide post fixedly disposed on the one-way valve intermediate layer plate and located on the right side of the one-way valve intermediate layer plate, and a one-way adjustment device disposed on the right side of the one-way valve intermediate layer plate. The eight one-way valve elliptical through holes are distributed between the one-way valve guide post and the edge of the one-way valve intermediate layer plate.

[0010] The one-way adjustment device includes a one-way valve guide barrel with its opening facing left, a one-way valve layer plate fixedly installed at the left end of the one-way valve guide barrel and located on the outer wall of the one-way valve guide barrel, eight one-way valve layer plate through holes for the one-way valves on the one-way valve layer plate, a one-way valve rubber flap fixedly connected to the one-way valve layer plate and the one-way valve intermediate layer plate, and a one-way valve position adjustment device installed on one side of the one-way valve guide barrel. The one-way valve layer plate through holes are located between the edges of the one-way valve guide barrel and the one-way valve layer plate and divide the one-way valve layer plate evenly. The one-way valve layer plate through holes are arranged opposite to the one-way valve elliptical through holes. The one-way valve rubber flaps cover the positions of the one-way valve layer plate through holes.

[0011] The one-way valve position adjustment device includes a fifth adjusting tooth disposed on the one-way valve side wall of the one-way valve guide barrel, a one-way valve adjusting shaft disposed on one side of the one-way valve guide barrel, and a sixth adjusting tooth disposed on the one-way valve adjusting shaft and meshing with the fifth adjusting tooth. The fifth adjusting tooth is laterally distributed on the one-way valve side wall of the one-way valve guide barrel, and the sixth adjusting tooth is disposed on the outer surface of the one-way valve adjusting shaft. One end of the one-way valve adjusting shaft is rotatably connected to the inner side wall of the oil circuit connecting pipe, and the other end passes through the side wall of the oil circuit connecting pipe to the outer side of the oil circuit connecting pipe.

[0012] A one-way valve sealing ring is provided at the penetration point between the one-way valve adjusting shaft and the oil circuit connecting pipe, and the one-way valve adjusting shaft and the one-way valve sealing ring are interference fit.

[0013] The one-way valve adjusting shaft is located at one end outside the oil circuit connecting pipe, and a one-way valve adjusting handle is provided thereon.

[0014] The oil storage tank of the present invention is provided with a pointed end, and the exhaust device is provided at the pointed end. The exhaust device includes an exhaust pipe provided at the pointed end and communicating with the inside of the oil storage tank, and an exhaust valve provided on the exhaust pipe.

[0015] The oil draining device includes an oil drain pipe installed on the side wall of the oil storage tank and an oil drain valve installed on the oil drain pipe.

[0016] The oil extraction device of the present invention includes an oil extraction pipe with one end connected to the bottom of the oil storage tank, a needle tube at the other end of the oil extraction pipe, and a two-way check valve on the oil extraction pipe.

[0017] The bidirectional check valve of this invention includes a bidirectional valve intermediate layer plate fixedly mounted on the sucker pipe, an upper adjustment device mounted above the bidirectional valve intermediate layer plate, and a lower adjustment device mounted below the bidirectional valve intermediate layer plate. The bidirectional valve intermediate layer plate has eight bidirectional valve elliptical through holes distributed around its center. A bidirectional valve guide post is disposed through the center of the bidirectional valve intermediate layer plate. The bidirectional valve elliptical through holes are distributed between the bidirectional valve guide post and the edges of the bidirectional valve intermediate layer plate. Both the upper and lower adjustment devices are mounted on the bidirectional valve guide post. The upper adjustment device includes an upper guide barrel with its opening facing downwards, an upper plate fixedly mounted at the lower end of the upper guide barrel and located on its outer side wall, eight upper plate through holes on the upper plate, and four through holes between the upper plate and the bidirectional valve intermediate layer plate. The upper layer rubber flaps are fixedly connected between the upper and lower layers and to the upper layer plate, and an upper position adjustment device is provided on one side of the upper guide barrel. The upper layer plate through hole is provided between the upper guide barrel and the edge of the upper layer plate and divides the upper layer plate evenly. The upper layer plate through hole is arranged opposite to the elliptical through hole of the two-way valve. The upper layer rubber flaps are staggered at the positions of the upper layer plate through holes. The upper position adjustment device includes a first adjustment tooth provided on the side wall of the upper guide barrel, an upper adjustment shaft provided on one side of the upper guide barrel, and a second adjustment tooth provided on the upper adjustment shaft and meshing with the first adjustment tooth. The first adjustment tooth is vertically distributed on the side wall of the upper guide barrel, and the second adjustment tooth is provided on the outer surface of the upper adjustment shaft. One end of the upper adjustment shaft is rotatably connected to the inner side wall of the sucker pipe, and the other end passes through the side wall of the sucker pipe to the outer side of the sucker pipe.

[0018] The upper adjusting shaft and the oil pipe of the present invention are provided with an upper sealing ring at the penetration point, and the upper adjusting shaft and the upper sealing ring are interference fit.

[0019] The upper adjustment shaft of the present invention is provided with an upper adjustment handle at one end located outside the oil pipe.

[0020] The lower adjustment device of the present invention includes an upward-opening lower guide barrel, a lower plate fixedly disposed at the upper end of the lower guide barrel and located on the outer wall of the lower guide barrel, eight lower plate through holes disposed on the lower plate, four lower rubber valves disposed between the lower plate and the intermediate plate of the two-way valve and fixedly connected to the lower plate, and a lower position adjustment device disposed on one side of the lower guide barrel. The lower plate through holes are disposed between the edges of the lower guide barrel and the lower plate and divide the lower plate evenly. The lower plate through holes are disposed opposite to the elliptical through holes of the two-way valve. The lower rubber valves are staggered at the locations of the lower plate through holes, and the lower rubber valves are staggered with the upper rubber valves.

[0021] The lower position adjustment device of the present invention includes a third adjustment tooth disposed on the side wall of the lower guide barrel, a lower adjustment shaft disposed on one side of the lower guide barrel, and a fourth adjustment tooth disposed on the lower adjustment shaft and meshing with the third adjustment tooth. The third adjustment tooth is vertically distributed below the side wall of the lower guide barrel, and the fourth adjustment tooth is disposed below the outer surface of the lower adjustment shaft. One end of the lower adjustment shaft is rotatably connected to the inner side wall of the sucker pipe, and the other end passes through the side wall of the sucker pipe to the outer side of the sucker pipe.

[0022] A lower sealing ring is provided at the penetration point between the lower adjusting shaft and the sucker pipe. The lower adjusting shaft and the lower sealing ring are interference fit. A lower adjusting handle is provided at the end of the lower adjusting shaft located outside the sucker pipe.

[0023] This invention includes the following steps:

[0024] Step S1: Turn the upper and lower adjustment handles to make the upper and lower rubber valves fit tightly against the middle plate of the two-way valve, thereby closing the two-way check valve, closing the exhaust valve and the oil drain valve, and turning the one-way valve adjustment handle to make the one-way valve rubber valve fit tightly against the middle plate of the one-way valve, thereby closing the one-way check valve, thus completing the initial state setting.

[0025] Step S2: Turn the one-way valve adjustment handle to create a gap between the rubber flap of the one-way valve and the middle plate of the one-way valve, so that the one-way check valve opens. The insulating oil in the main transformer enters the oil storage tank through the oil circuit connection pipe. After the oil storage tank stores a certain amount, turn the one-way valve adjustment handle to close the one-way check valve and open the exhaust valve to allow the gas in the insulating oil to be discharged through the exhaust pipe at the tip.

[0026] Step S3: Rotate the lower adjustment handle to create a certain gap between the lower rubber flap and the elliptical through-hole of the intermediate layer plate of the bidirectional valve. Pull the syringe, and the insulating oil will pass through the remaining four through-holes of the upper plate, the four elliptical through-holes of the intermediate layer plate of the bidirectional valve, and the through-hole of the lower plate in sequence, so that a certain amount of insulating oil is drawn out of the syringe. Due to the characteristics of the lower rubber flap, if backflow occurs, the four elliptical through-holes of the intermediate layer plate of the bidirectional valve that can flow will be blocked by the lower rubber flap.

[0027] Step S4: Rotate the lower adjustment handle to make the lower rubber flap fit tightly against the elliptical through hole of the intermediate layer plate of the bidirectional valve. Rotate the upper adjustment handle to make the upper rubber flap have a certain gap with the elliptical through hole of the intermediate layer plate of the bidirectional valve. Push the needle tube, and the insulating oil will pass through the remaining four through holes of the lower plate, the four elliptical through holes of the intermediate layer plate of the bidirectional valve, and the through hole of the upper plate in sequence. The insulating oil in the needle tube, along with the gas, will be discharged to the upper end of the oil extraction tube. The gas will be discharged through the exhaust pipe. Due to the characteristics of the upper rubber flap, if backflow occurs, the four elliptical through holes of the intermediate layer plate of the bidirectional valve that can flow will be blocked by the lower rubber flap.

[0028] Step S5: Repeat steps S3 and S4 until insulating oil containing removed gas is obtained in the syringe.

[0029] Step S6: Open the drain valve and drain the insulating oil in the oil storage tank through the drain pipe.

[0030] The positive effects of this invention are as follows:

[0031] When in use, turn the upper and lower adjustment handles to make the upper and lower rubber valves fit tightly against the middle plate of the two-way valve, thereby closing the two-way check valve, the exhaust valve, and the oil drain valve. Turn the one-way valve adjustment handle to make the one-way valve rubber valve fit tightly against the middle plate of the one-way valve, thereby closing the one-way check valve and completing the initial state setting.

[0032] Turn the one-way valve adjustment handle to create a gap between the rubber flap of the one-way valve and the middle plate of the one-way valve, so that the one-way check valve opens. The insulating oil in the main transformer enters the oil storage tank through the oil circuit connection pipe. After the oil storage tank stores a certain amount, turn the one-way valve adjustment handle to close the one-way check valve and open the exhaust valve to allow the gas in the insulating oil to be discharged through the pointed exhaust pipe.

[0033] Rotate the lower adjustment handle to create a certain gap between the lower rubber flap and the elliptical through-hole of the intermediate layer plate of the bidirectional valve. Pull the syringe, and the insulating oil will pass through the remaining four through-holes of the upper plate, the four elliptical through-holes of the intermediate layer plate of the bidirectional valve, and the through-hole of the lower plate in sequence, so that a certain amount of insulating oil is drawn into the syringe. Due to the characteristics of the lower rubber flap, if backflow occurs, the four elliptical through-holes of the intermediate layer plate of the bidirectional valve that can flow will be blocked by the lower rubber flap.

[0034] Rotate the lower adjustment handle to make the lower rubber flap fit tightly against the elliptical through hole of the intermediate layer plate of the two-way valve. Rotate the upper adjustment handle to make the upper rubber flap have a certain gap with the elliptical through hole of the intermediate layer plate of the two-way valve. Push the needle tube, and the insulating oil will pass through the remaining four through holes of the lower layer plate, the four elliptical through holes of the intermediate layer plate of the two-way valve, and the through hole of the upper layer plate in sequence. The insulating oil in the needle tube, along with the gas, will be discharged to the upper end of the oil extraction tube. The gas will be discharged through the exhaust pipe. Due to the characteristics of the upper rubber flap, if backflow occurs, the four elliptical through holes of the intermediate layer plate of the two-way valve that can flow will be blocked by the lower rubber flap.

[0035] Repeat the above steps until insulating oil containing removed gas is obtained in the syringe.

[0036] Open the drain valve and drain the insulating oil from the oil storage tank through the drain pipe. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the present invention;

[0038] Figure 2 This is a schematic diagram showing the location of the intermediate layer plate in this invention;

[0039] Figure 3 This is a schematic diagram of the intermediate layer plate structure of the present invention;

[0040] Figure 4 This is a schematic diagram of the distribution of the upper rubber valve in this invention;

[0041] Figure 5 This is a schematic diagram showing the positions of the upper plate and the upper rubber flap of the present invention;

[0042] Figure 6 This is a schematic diagram of the distribution of the lower layer rubber valve in this invention;

[0043] Figure 7 This is a schematic diagram showing the positions of the lower plate and the lower rubber flap of the present invention;

[0044] Figure 8 This is a schematic diagram of the position adjustment device structure of the present invention;

[0045] Figure 9 This is a schematic diagram of the position adjustment device structure of the present invention;

[0046] Figure 10 This is a schematic diagram showing the position of the guide post of the one-way valve of the present invention;

[0047] Figure 11 This is a schematic diagram showing the position of the one-way valve guide barrel of the present invention;

[0048] Figure 12 This is a schematic diagram showing the location of the oil storage tank in this invention.

[0049] In the attached diagram: 1. Oil sucker pipe; 2. Intermediate layer plate; 3. Elliptical through hole; 4. Guide post; 5. Upper guide barrel; 6. Upper layer plate; 7. Upper layer plate through hole; 8. Upper layer rubber flap; 9. First adjusting tooth; 10. Upper adjusting shaft; 11. Second adjusting tooth; 12. Upper sealing ring; 13. Upper adjusting handle; 14. Lower guide barrel; 15. Lower layer plate; 16. Lower layer plate through hole; 17. Lower layer rubber flap; 18. Third adjusting tooth; 19. Lower adjusting shaft; 20. Fourth adjusting tooth; 21. Lower sealing ring; 22. Lower adjusting handle; 31. Main transformer. Piping; 32. Oil connection pipe; 33. Oil reservoir; 34. One-way check valve; 35. One-way valve intermediate plate; 36. One-way valve elliptical through hole; 37. One-way valve guide post; 38. One-way valve guide barrel; 39. One-way valve plate; 40. One-way valve rubber flap; 41. Fifth adjusting tooth; 42. One-way valve adjusting shaft; 43. Sixth adjusting tooth; 44. One-way valve sealing ring; 45. One-way valve adjusting handle; 46. Tip; 47. Exhaust pipe; 48. Exhaust valve; 49. Oil drain pipe; 50. Oil drain valve; 51. Needle tube; 52. Two-way check valve. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0053] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0056] Example 1

[0057] like Figure 1 As shown in Figure 12, the present invention is used to extract oil from the main transformer pipeline 31, including an oil connection pipe 32 connected to the main transformer pipeline 31 at one end, an oil storage tank 33 connected to the other end of the oil connection pipe 32, a one-way check valve 34 installed on the oil connection pipe 32, an oil extraction device installed on the oil storage tank 33 and connected to the bottom of the oil storage tank 33, an exhaust device installed at the upper end of the oil storage tank 33, and an oil discharge device installed on the side wall of the oil storage tank 33.

[0058] The one-way check valve 34 of the present invention includes a one-way valve intermediate layer plate 35 fixedly disposed inside the oil circuit connecting pipe 32, eight one-way valve elliptical through holes 36 disposed on the one-way valve intermediate layer plate 35 and distributed around the center of the one-way valve intermediate layer plate 35, a one-way valve guide post 37 fixedly disposed on the one-way valve intermediate layer plate 35 and located on the right side of the one-way valve intermediate layer plate 35, and a one-way adjustment device disposed on the right side of the one-way valve intermediate layer plate 35. The eight one-way valve elliptical through holes 36 are distributed between the one-way valve guide post 37 and the edge of the one-way valve intermediate layer plate 35.

[0059] The one-way adjustment device includes a one-way valve guide barrel 38 with its opening facing left, a one-way valve layer plate 39 fixedly disposed at the left end of the one-way valve guide barrel 38 and located on the outer wall of the one-way valve guide barrel 38, eight one-way valve layer plate 39 through holes disposed on the one-way valve layer plate 39, a one-way valve rubber flap 40 disposed between the one-way valve layer plate 39 and the one-way valve intermediate layer plate 35 and fixedly connected to the one-way valve layer plate 39, and a one-way valve position adjustment device disposed on one side of the one-way valve guide barrel 38. The one-way valve layer plate 39 through holes are disposed between the edges of the one-way valve guide barrel 38 and the one-way valve layer plate 39 and divide the one-way valve layer plate 39 evenly. The one-way valve layer plate 39 through holes are disposed opposite to the one-way valve elliptical through holes 36. The one-way valve rubber flap 40 covers the location of the one-way valve layer plate 39 through holes.

[0060] The one-way valve position adjustment device includes a fifth adjusting tooth 41 disposed on the one-way valve side wall of the one-way valve guide barrel 38, a one-way valve adjusting shaft 42 disposed on one side of the one-way valve guide barrel 38, and a sixth adjusting tooth 43 disposed on the one-way valve adjusting shaft 42 and meshing with the fifth adjusting tooth 41. The fifth adjusting tooth 41 is laterally distributed on the one-way valve side wall of the one-way valve guide barrel 38, and the sixth adjusting tooth 43 is disposed on the outer surface of the one-way valve adjusting shaft 42. One end of the one-way valve adjusting shaft 42 is rotatably connected to the inner side wall of the oil circuit connecting pipe 32, and the other end passes through the side wall of the oil circuit connecting pipe 32 to the outer side of the oil circuit connecting pipe 32.

[0061] A one-way valve sealing ring 44 is provided at the penetration point between the one-way valve adjusting shaft 42 and the oil circuit connecting pipe 32, and the one-way valve adjusting shaft 42 and the one-way valve sealing ring 44 are interference fit.

[0062] The one-way valve adjusting shaft 42 is provided with a one-way valve adjusting handle 45 at one end located outside the oil circuit connecting pipe 32.

[0063] The oil storage tank 33 of the present invention is provided with a pointed tip 46, and the exhaust device is provided at the pointed tip 46. The exhaust device includes an exhaust pipe 47 provided at the pointed tip 46 and communicating with the inner side of the oil storage tank 33, and an exhaust valve 48 provided on the exhaust pipe 47.

[0064] The oil discharge device includes an oil discharge pipe 49 installed on the side wall of the oil storage tank 33 and an oil discharge valve 50 installed on the oil discharge pipe 49.

[0065] The oil extraction device of the present invention includes an oil extraction pipe 1 with one end connected to the bottom end of the oil storage tank 33, a needle tube 51 at the other end of the oil extraction pipe 1, and a two-way check valve 52 on the oil extraction pipe 1.

[0066] The bidirectional check valve 52 of this invention includes a bidirectional valve intermediate layer plate 2 fixedly mounted on the sucker pipe 1, an upper adjustment device mounted above the bidirectional valve intermediate layer plate 2, and a lower adjustment device mounted below the bidirectional valve intermediate layer plate 2. The bidirectional valve intermediate layer plate 2 has eight bidirectional valve elliptical through holes 3 distributed around its center. A bidirectional valve guide post 4 is disposed through the center of the bidirectional valve intermediate layer plate 2. The bidirectional valve elliptical through holes 3 are distributed between the bidirectional valve guide post 4 and the edge of the bidirectional valve intermediate layer plate 2. Both the upper and lower adjustment devices are mounted on the bidirectional valve guide post 4. The upper adjustment device includes an upper guide barrel 5 with its opening facing downwards, an upper layer plate 6 fixedly mounted at the lower end of the upper guide barrel 5 and located on the outer wall of the upper guide barrel 5, eight upper layer plate through holes 7 on the upper layer plate 6, and four through holes 7 located between the upper layer plate 6 and the bidirectional valve intermediate layer plate 2. The upper rubber flap 8 is fixedly connected to the upper plate 6, and the upper position adjustment device is provided on one side of the upper guide barrel 5. The upper plate through hole 7 is provided between the edges of the upper guide barrel 5 and the upper plate 6 and divides the upper plate 6 evenly. The upper plate through hole 7 is provided opposite to the elliptical through hole 3 of the bidirectional valve. The upper rubber flap 8 is staggered at the position of the upper plate through hole 7. The upper position adjustment device includes a first adjustment tooth 9 provided on the side wall of the upper guide barrel 5, an upper adjustment shaft 10 provided on one side of the upper guide barrel 5, and a second adjustment tooth 11 provided on the upper adjustment shaft 10 and meshing with the first adjustment tooth 9. The first adjustment tooth 9 is vertically distributed on the side wall of the upper guide barrel 5, and the second adjustment tooth 11 is provided on the outer surface of the upper adjustment shaft 10. One end of the upper adjustment shaft 10 is rotatably connected to the inner side wall of the oil extraction pipe 1, and the other end passes through the side wall of the oil extraction pipe 1 to the outer side of the oil extraction pipe 1.

[0067] An upper sealing ring 12 is provided at the penetration point between the upper adjusting shaft 10 and the oil extraction pipe 1, and the upper adjusting shaft 10 and the upper sealing ring 12 are interference fit.

[0068] The upper adjustment shaft 10 of the present invention is provided with an upper adjustment handle 13 at one end located outside the oil pipe 1.

[0069] The lower adjustment device of the present invention includes an upward-opening lower guide barrel 14, a lower plate 15 fixedly disposed on the upper end of the lower guide barrel 14 and located on the outer side wall of the lower guide barrel 14, eight lower plate through holes 16 disposed on the lower plate 15, four lower rubber valves 17 disposed between the lower plate 15 and the intermediate plate 2 of the two-way valve and fixedly connected to the lower plate 15, and a lower position adjustment device disposed on one side of the lower guide barrel 14. The lower plate through holes 16 are disposed between the edges of the lower guide barrel 14 and the lower plate 15 and divide the lower plate 15 evenly. The lower plate through holes 16 are disposed opposite to the elliptical through holes 3 of the two-way valve. The lower rubber valves 17 are staggered at the positions of the lower plate through holes 16. The lower rubber valves 17 and the upper rubber valves 8 are staggered.

[0070] Example 2

[0071] The lower position adjustment device of the present invention includes a third adjustment tooth 18 disposed on the side wall of the lower guide barrel 14, a lower adjustment shaft 19 disposed on one side of the lower guide barrel 14, and a fourth adjustment tooth 20 disposed on the lower adjustment shaft 19 and meshing with the third adjustment tooth 18. The third adjustment tooth 18 is vertically distributed under the side wall of the lower guide barrel 14, and the fourth adjustment tooth 20 is disposed under the outer surface of the lower adjustment shaft 19. One end of the lower adjustment shaft 19 is rotatably connected to the inner side wall of the oil extraction pipe 1, and the other end passes through the side wall of the oil extraction pipe 1 to the outer side of the oil extraction pipe 1.

[0072] A lower sealing ring 21 is provided at the penetration point between the lower adjusting shaft 19 and the oil sucker pipe 1. The lower adjusting shaft 19 and the lower sealing ring 21 are interference fit. A lower adjusting handle 22 is provided at the end of the lower adjusting shaft 19 located outside the oil sucker pipe 1.

[0073] Example 3

[0074] This invention includes the following steps:

[0075] Step S1: Turn the upper and lower adjustment handles to make the upper and lower rubber flaps fit tightly against the intermediate plate of the two-way valve, thereby closing the two-way check valve 52, closing the exhaust valve 48 and the oil drain valve 50, and turning the one-way valve adjustment handle 45 to make the one-way valve rubber flap fit tightly against the intermediate plate 35 of the one-way valve, thereby closing the one-way check valve 34, thus completing the initial state setting.

[0076] Step S2: Turn the one-way valve adjustment handle 45 to create a gap between the one-way valve rubber flap and the one-way valve intermediate plate 35, so that the one-way check valve 34 is opened. The insulating oil in the main transformer enters the oil storage tank 33 through the oil circuit connection pipe 32. After the oil storage tank 33 stores a certain amount, turn the one-way valve adjustment handle 45 to close the one-way check valve 34 and open the exhaust valve 48 to allow the gas in the insulating oil to be discharged through the exhaust pipe 47 at the tip 46.

[0077] Step S3: Rotate the lower adjustment handle to create a certain gap between the lower rubber flap and the elliptical through hole of the bidirectional valve intermediate plate. Pull the needle tube 51, and the insulating oil will pass through the remaining four upper plate through holes, the four elliptical through holes of the bidirectional valve intermediate plate, and the lower plate through holes in sequence, so that a certain amount of insulating oil is drawn into the needle tube 51. Due to the characteristics of the lower rubber flap, if backflow occurs, the four elliptical through holes of the bidirectional valve intermediate plate that can flow will be blocked by the lower rubber flap.

[0078] Step S4: Rotate the lower adjustment handle to make the lower rubber flap fit tightly against the elliptical through hole of the intermediate layer plate of the bidirectional valve. Rotate the upper adjustment handle to make the upper rubber flap have a certain gap with the elliptical through hole of the intermediate layer plate of the bidirectional valve. Push the needle tube 51, and the insulating oil passes through the remaining four lower plate through holes, the four elliptical through holes of the intermediate layer plate of the bidirectional valve, and the upper plate through holes in sequence. The insulating oil in the needle tube 51, along with the gas, is discharged to the upper end of the oil extraction tube 1. The gas is discharged through the exhaust pipe 47. Due to the characteristics of the upper rubber flap, if backflow occurs, the four elliptical through holes of the intermediate layer plate of the bidirectional valve that can flow will be blocked by the lower rubber flap.

[0079] Step S5: Repeat steps S3 and S4 until insulating oil with removed gas is obtained in syringe 51.

[0080] Step S6: Open the drain valve 50 and drain the insulating oil in the oil storage tank 33 through the drain pipe 49.

[0081] Currently, the technical solution of this application has undergone pilot testing, which is a small-scale experiment before the product is mass-produced. After the pilot testing was completed, a user survey was conducted on a small scale, and the survey results showed that user satisfaction was high. Now, preparations are underway for the formal production and industrialization of the product (including intellectual property risk warning surveys).

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A main transformer pipeline oil sampling system for sampling oil from the main transformer pipeline (31), characterized in that: It includes an oil circuit connecting pipe (32) connected to the main transformer pipeline (31) at one end, an oil storage tank (33) connected to the other end of the oil circuit connecting pipe (32), a one-way check valve (34) installed on the oil circuit connecting pipe (32), an oil pumping device installed on the oil storage tank (33) and connected to the bottom of the oil storage tank (33), an exhaust device installed at the top of the oil storage tank (33), and an oil discharge device installed on the side wall of the oil storage tank (33); The oil extraction device includes an oil extraction pipe (1) with one end connected to the bottom of the oil storage tank (33), a needle tube (51) at the other end of the oil extraction pipe (1), and a two-way check valve (52) on the oil extraction pipe (1). The bidirectional check valve (52) includes a bidirectional valve intermediate layer plate (2) fixedly installed on the sucker pipe (1), an upper adjustment device installed above the bidirectional valve intermediate layer plate (2), and a lower adjustment device installed below the bidirectional valve intermediate layer plate (2); the bidirectional valve intermediate layer plate (2) is provided with eight bidirectional valve elliptical through holes (3) distributed around the center of the bidirectional valve intermediate layer plate (2); a bidirectional valve guide post (4) is provided through the middle position of the bidirectional valve intermediate layer plate (2), and the bidirectional valve elliptical through holes (3) are distributed between the bidirectional valve guide post (4) and the edge of the bidirectional valve intermediate layer plate (2); the upper adjustment device and the lower adjustment device are both installed on the bidirectional valve guide post (4); the upper adjustment device includes an upper guide barrel (5) with its opening facing downward, an upper layer plate (6) fixedly installed at the lower end of the upper guide barrel (5) and located on the outer wall of the upper guide barrel (5), eight upper layer plate through holes (7) installed on the upper layer plate (6), and four holes (7) installed between the upper layer plate (6) and the bidirectional valve intermediate layer plate (2) and connected to the upper layer plate. (6) A fixedly connected upper rubber valve (8) and an upper position adjustment device disposed on one side of the upper guide barrel (5), wherein the upper plate through hole (7) is disposed between the edges of the upper guide barrel (5) and the upper plate (6) and divides the upper plate (6) equally, the upper plate through hole (7) is disposed opposite to the bidirectional valve elliptical through hole (3), and the upper rubber valve (8) is disposed alternately at the location of the upper plate through hole (7); the upper position adjustment device includes a first adjustment tooth disposed on the side wall of the upper guide barrel (5). 9) An upper adjusting shaft (10) is provided on one side of the upper guide barrel (5), and a second adjusting tooth (11) is provided on the upper adjusting shaft (10) and meshes with the first adjusting tooth (9). The first adjusting tooth (9) is vertically distributed on the side wall of the upper guide barrel (5), and the second adjusting tooth (11) is provided on the outer surface of the upper adjusting shaft (10). One end of the upper adjusting shaft (10) is rotatably connected to the inner side wall of the oil extraction pipe (1), and the other end passes through the side wall of the oil extraction pipe (1) to the outer side of the oil extraction pipe (1). The lower adjustment device includes an upward-opening lower guide barrel (14), a lower plate (15) fixedly disposed on the upper end of the lower guide barrel (14) and located on the outer wall of the lower guide barrel (14), eight lower plate through holes (16) disposed on the lower plate (15), four lower rubber valves (17) disposed between the lower plate (15) and the intermediate plate (2) of the two-way valve and fixedly connected to the lower plate (15), and a lower position adjustment device disposed on one side of the lower guide barrel (14). The lower plate through holes (16) are disposed between the edges of the lower guide barrel (14) and the lower plate (15) and divide the lower plate (15) evenly. The lower plate through holes (16) are disposed opposite to the elliptical through holes (3) of the two-way valve. The lower rubber valves (17) are staggered at the positions of the lower plate through holes (16). The lower rubber valves (17) and the upper rubber valves (8) are staggered. The lower position adjustment device includes a third adjustment tooth (18) disposed on the side wall of the lower guide barrel (14), a lower adjustment shaft (19) disposed on one side of the lower guide barrel (14), and a fourth adjustment tooth (20) disposed on the lower adjustment shaft (19) and meshing with the third adjustment tooth (18). The third adjustment tooth (18) is vertically distributed under the side wall of the lower guide barrel (14), and the fourth adjustment tooth (20) is disposed under the outer surface of the lower adjustment shaft (19). One end of the lower adjustment shaft (19) is rotatably connected to the inner side wall of the oil extraction pipe (1), and the other end passes through the side wall of the oil extraction pipe (1) to the outer side of the oil extraction pipe (1). A lower sealing ring (21) is provided at the penetration point between the lower adjusting shaft (19) and the oil sucker pipe (1). The lower adjusting shaft (19) and the lower sealing ring (21) are interference fit. A lower adjusting handle (22) is provided at one end of the lower adjusting shaft (19) located outside the oil sucker pipe (1).

2. The main transformer pipeline oil sampling system according to claim 1, characterized in that: The one-way check valve (34) includes a one-way valve intermediate plate (35) fixedly installed inside the oil circuit connecting pipe (32), eight one-way valve elliptical through holes (36) installed on the one-way valve intermediate plate (35) and distributed around the center of the one-way valve intermediate plate (35), a one-way valve guide post (37) fixedly installed on the one-way valve intermediate plate (35) and located on the right side of the one-way valve intermediate plate (35), and a one-way adjustment device installed on the right side of the one-way valve intermediate plate (35). The eight one-way valve elliptical through holes (36) are distributed between the one-way valve guide post (37) and the edge of the one-way valve intermediate plate (35). The one-way adjustment device includes a one-way valve guide barrel (38) with its opening facing left, a one-way valve layer plate (39) fixedly disposed at the left end of the one-way valve guide barrel (38) and located on the outer wall of the one-way valve guide barrel (38), eight one-way valve layer plate (39) through holes disposed on the one-way valve layer plate (39), and a one-way valve rubber flap disposed between the one-way valve layer plate (39) and the one-way valve intermediate layer plate (35) and fixedly connected to the one-way valve layer plate (39). (40) and a one-way valve position adjustment device provided on one side of the one-way valve guide barrel (38), wherein the through hole of the one-way valve plate (39) is provided between the edge of the one-way valve guide barrel (38) and the one-way valve plate (39) and divides the one-way valve plate (39) equally, wherein the through hole of the one-way valve plate (39) is provided opposite to the one-way valve elliptical through hole (36), and the one-way valve rubber flap (40) covers the position of the through hole of the one-way valve plate (39); The one-way valve position adjustment device includes a fifth adjustment tooth (41) disposed on the side wall of the one-way valve guide barrel (38), a one-way valve adjustment shaft (42) disposed on one side of the one-way valve guide barrel (38), and a sixth adjustment tooth (43) disposed on the one-way valve adjustment shaft (42) and meshing with the fifth adjustment tooth (41). The fifth adjustment tooth (41) is laterally distributed on the side wall of the one-way valve guide barrel (38), and the sixth adjustment tooth (43) is disposed on the outer surface of the one-way valve adjustment shaft (42). One end of the one-way valve adjustment shaft (42) is rotatably connected to the inner side wall of the oil circuit connecting pipe (32), and the other end passes through the side wall of the oil circuit connecting pipe (32) to the outer side of the oil circuit connecting pipe (32). A one-way valve sealing ring (44) is provided at the penetration point between the one-way valve adjusting shaft (42) and the oil circuit connecting pipe (32), and the one-way valve adjusting shaft (42) and the one-way valve sealing ring (44) are interference fit; The one-way valve adjusting shaft (42) is provided with a one-way valve adjusting handle (45) at one end located outside the oil circuit connecting pipe (32).

3. The main transformer pipeline oil sampling system according to claim 2, characterized in that: The oil storage tank (33) is provided with a tip (46), and the exhaust device is provided at the tip (46). The exhaust device includes an exhaust pipe (47) provided at the tip (46) and communicating with the inside of the oil storage tank (33) and an exhaust valve (48) provided on the exhaust pipe (47). The oil discharge device includes an oil discharge pipe (49) installed on the side wall of the oil storage tank (33) and an oil discharge valve (50) installed on the oil discharge pipe (49).

4. The main transformer pipeline oil sampling system according to claim 3, characterized in that: An upper sealing ring (12) is provided at the penetration point between the upper adjusting shaft (10) and the oil extraction pipe (1), and the upper adjusting shaft (10) and the upper sealing ring (12) are interference fit.

5. The main transformer pipeline oil sampling system according to claim 4, characterized in that: The upper adjustment shaft (10) is provided with an upper adjustment handle (13) at one end located outside the oil extraction pipe (1).

6. The main transformer pipeline oil sampling system according to claim 5, characterized in that: Includes the following steps: Step S1: Turn the upper and lower adjustment handles to make the upper and lower rubber valves fit tightly against the intermediate layer plate of the two-way valve, so that the two-way check valve (52) is closed, the exhaust valve (48) and the oil drain valve (50) are closed, and turn the one-way valve adjustment handle (45) to make the one-way valve rubber valve fit tightly against the intermediate layer plate (35) of the one-way valve, so that the one-way check valve (34) is closed, thus completing the initial state setting; Step S2: Turn the one-way valve adjustment handle (45) to create a gap between the one-way valve rubber flap and the one-way valve intermediate plate (35), so that the one-way check valve (34) is opened. The insulating oil in the main transformer enters the oil storage tank (33) through the oil circuit connection pipe (32). After the oil storage tank (33) stores a certain amount, turn the one-way valve adjustment handle (45) to close the one-way check valve (34) and open the exhaust valve (48) so that the gas in the insulating oil is discharged through the exhaust pipe (47) of the tip (46). Step S3: Rotate the lower adjustment handle to create a certain gap between the lower rubber flap and the elliptical through hole of the bidirectional valve intermediate plate. Pull the needle (51) and the insulating oil will pass through the remaining four upper plate through holes, the four elliptical through holes of the bidirectional valve intermediate plate, and the lower plate through holes in sequence, so that a certain amount of insulating oil is drawn out of the needle (51). Due to the characteristics of the lower rubber flap, if backflow occurs, the four elliptical through holes of the bidirectional valve intermediate plate that can flow will be blocked by the lower rubber flap. Step S4: Rotate the lower adjustment handle to make the lower rubber flap fit tightly against the elliptical through hole of the intermediate layer plate of the bidirectional valve. Rotate the upper adjustment handle to make the upper rubber flap have a certain gap with the elliptical through hole of the intermediate layer plate of the bidirectional valve. Push the needle tube (51) and the insulating oil passes through the remaining four lower plate through holes, the four elliptical through holes of the intermediate layer plate of the bidirectional valve and the upper plate through holes in sequence. The insulating oil in the needle tube (51) along with the gas is discharged to the upper end of the oil extraction tube (1). The gas is discharged through the exhaust pipe (47). Due to the characteristics of the upper rubber flap, if backflow occurs, the four elliptical through holes of the intermediate layer plate of the bidirectional valve that can flow will be blocked by the lower rubber flap. Step S5, repeat steps S3 and S4 until insulating oil with removed gas is obtained in the syringe (51); Step S6: Open the drain valve (50) and drain the insulating oil in the oil storage tank (33) through the drain pipe (49).

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