A sampling bucket for oil immersed transformers

Abstract

The utility model relates to a sampling bucket for oil -immersed transformer, including bucket body and negative pressure cylinder, the inside sliding joint of negative pressure cylinder has the push board, the one side of push board is provided with the piston head, the one side fixed mounting of push board has the connecting rod, the one end fixed mounting of connecting rod extension to the outer end of negative pressure cylinder has the pull plate, the pull plate is fixedly installed and has the pull ring, the outer surface of connecting rod is sleeved and has the spring, through pulling the pull ring, makes the negative pressure environment in negative pressure cylinder, at this moment, the one way valve on oil inlet pipe opens, the one way valve on oil pipe closes, and the negative pressure is through the oil absorption head of oil inlet pipe one end and is used to transformer oil outlet, and oil sample is automatically sucked into oil inlet pipe, after unfastening the pull ring, the oil sample in negative pressure cylinder is pressed into the bucket body through oil pipe, and the one way valve of oil pipe opens, and the one way valve of oil inlet pipe closes, avoids the backflow of oil sample, and the negative pressure drive replaces traditional open pour, and oil sample does not need direct contact with the outside world or tool, effectively avoids the pollution of oil sample.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to a sampling bucket for oil-immersed transformers. Background Technology

[0002] Transformer oil plays a vital role in the safe and stable operation of oil-immersed transformers, serving functions such as insulation, heat dissipation, and arc suppression. To ensure this, regular oil sampling is necessary to test the oil's moisture and gas content, thereby analyzing the transformer's operating condition. Currently, oil sampling is performed by opening the butterfly valve at the oil drain port using a specialized tool.

[0003] In existing oil-immersed transformer sampling containers, the oil sample is directly exposed to the external environment or comes into contact with tools during the sampling process. The traditional open-top pouring method easily leads to the oil sample coming into full contact with air and oxidizing. Furthermore, external dust and moisture may mix into the oil sample. In addition, most sampling containers only use simple threaded caps without sealing gaskets, which can lead to oil sample leakage or continuous contact with air during transportation, resulting in oxidation and deterioration. Utility Model Content

[0004] This invention addresses the technical problems in existing technologies where oil samples are directly exposed to the outside environment or come into contact with tools during sampling, and are easily oxidized and mixed with dust and moisture when poured out openly. Furthermore, most sampling containers only use simple threaded caps without sealing gaskets, which can easily lead to leakage during transportation or oxidation and deterioration due to continuous contact with air. This invention provides a sampling bucket for oil-immersed transformers.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A sampling bucket for oil-immersed transformers includes a bucket body, a limiting plate, and a negative pressure cylinder. A push plate is slidably connected inside the negative pressure cylinder. A piston head is provided on one side of the push plate, and a connecting rod is fixedly installed on one side of the push plate. One end of the connecting rod extends to the outer end of the negative pressure cylinder and is fixedly installed with a pull plate. A pull ring is fixedly installed on the pull plate. A spring is sleeved on the outer surface of the connecting rod, and both ends of the spring are fixedly connected to the negative pressure cylinder and the push plate, respectively. By pulling the pull ring, the piston head can be driven to form a negative pressure to achieve automatic oil suction, eliminating the need for manual scooping or pouring and avoiding direct contact between the oil sample and external tools, thus preventing contamination. The automatic return of the spring can push the oil sample in the negative pressure cylinder to the bucket body, eliminating the manual pushing step. Sampling can be completed by a single person, greatly improving sampling efficiency.

[0006] Preferably, the negative pressure cylinder is connected to an oil inlet pipe and an oil guide pipe, and an oil suction head is provided at one end of the oil inlet pipe. The oil suction head facilitates precise connection to the sampling port of the transformer, reducing oil sample leakage during sampling; the oil inlet pipe and the oil guide pipe have clearly defined functions, respectively undertaking the functions of oil suction and oil delivery, ensuring a clear oil sample delivery path and no cross-contamination, and improving the convenience and standardization of sampling operations.

[0007] Preferably, both the oil inlet pipe and the oil guide pipe are equipped with one-way valves. The one-way valves can strictly control the unidirectional flow of the oil sample, prevent backflow of the oil sample during the sampling process, which would result in insufficient sample volume, and at the same time prevent outside air and pollutants from flowing back into the negative pressure cylinder or tank through the pipeline, effectively ensuring the purity of the oil sample and reducing the risk of secondary contamination.

[0008] Preferably, the barrel is connected to an oil inlet pipe, and a threaded cap is threadedly connected to the oil inlet pipe. The threaded cap is easy to install and remove, and can be quickly tightened to seal the barrel after sampling; the cooperation between the oil inlet pipe and the threaded cap achieves a preliminary seal of the barrel, reduces the contact area between the oil sample and air, and delays the oxidation and deterioration of the oil sample.

[0009] Preferably, a limiting tube is fixedly installed inside the threaded cap, and a sealing gasket is provided between the limiting tube and the threaded cap. The limiting tube is inserted into the oil inlet pipe to achieve precise positioning of the threaded cap and prevent the threaded cap from loosening or shifting; the sealing gasket fits tightly with the oil inlet pipe port, forming double protection, significantly enhancing the sealing performance of the container, and effectively preventing oil sample leakage during transportation or storage.

[0010] Preferably, an mounting plate is fixedly installed on the inner wall of the oil inlet pipe, and the mounting plate has through holes. The mounting plate provides a stable support for the filter screen, ensuring that the filter screen will not shift due to the impact of the oil sample during sampling; the size of the through holes is adapted to the filter screen, which not only facilitates the installation and replacement of the filter screen, but also ensures that all oil samples flow through the filter screen, preventing unfiltered oil samples from directly entering the container.

[0011] Preferably, a filter screen is fixedly installed at the bottom end of the limiting plate, and the filter screen penetrates the mounting plate through a through hole. The filter screen can effectively intercept impurities such as metal debris and insulating particles in the oil sample, avoiding interference from impurities with the accuracy of subsequent oil quality detection results such as dielectric loss and chromatography; the design of the filter screen penetrating the mounting plate forces the oil sample to pass through the filtration process, ensuring the reliability and comprehensiveness of the filtration effect.

[0012] Preferably, a guide seat is fixedly installed inside the barrel. The inclined structure of the guide seat can guide the oil sample to naturally converge towards the oil outlet pipe, greatly reducing the amount of oil sample residue at the bottom of the barrel and improving the oil sample utilization rate; at the same time, it avoids local accumulation of oil sample inside the barrel, making the oil sample flow out more smoothly when pouring.

[0013] Preferably, the barrel body is connected to an oil outlet pipe at the lowest point of the guide seat, and a valve is installed on the oil outlet pipe. The oil outlet pipe, corresponding to the lowest point of the guide seat, ensures that the oil sample in the barrel flows out fully, reducing waste; the valve can flexibly adjust the oil outlet speed to avoid rapid oil sample flow leading to spillage, while accurately controlling the output volume to adapt to the sampling needs of different testing instruments and improve the convenience of testing operations.

[0014] Preferably, the bottom of the barrel is fixedly equipped with four support legs. The four evenly distributed support legs allow the barrel to be placed stably on uneven ground at the transformer site, preventing the barrel from tilting and causing oil sample spillage during sampling or pouring; the support legs also raise the bottom of the barrel, making it easier to connect the oil outlet pipe to the sample container, improving operational safety and convenience. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the filter screen and limiting plate of this utility model; Figure 4 This is a three-dimensional structural diagram of the threaded cap of this utility model; Figure 5 This is a three-dimensional structural diagram of the mounting plate of this utility model.

[0016] The attached diagram lists the components represented by each number as follows: 1. Barrel body; 2. Oil suction head; 3. Oil inlet pipe; 4. One-way valve; 5. Push plate; 6. Connecting rod; 7. Pull ring; 8. Pull plate; 9. Spring; 10. Negative pressure cylinder; 11. Piston head; 12. Oil guide pipe; 13. Limiting pipe; 14. Sealing gasket; 15. Threaded cap; 16. Limiting plate; 17. Filter screen; 18. Mounting plate; 19. Feed pipe; 20. Valve; 21. Discharge pipe; 22. Support leg; 23. Feed hopper; 24. Through hole. Detailed Implementation

[0017] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0020] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0021] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0022] Example 1 like Figures 1-2As shown, the sampling container for an oil-immersed transformer includes a container body 1, a limiting plate 16, and a negative pressure cylinder 10. A push plate 5 is slidably connected inside the negative pressure cylinder 10. A piston head 11 is located on one side of the push plate 5, and a connecting rod 6 is fixedly installed on one side of the push plate 5. One end of the connecting rod 6 extends to the outer end of the negative pressure cylinder 10, where a pull plate 8 is fixedly installed. A pull ring 7 is fixedly installed on the pull plate 8. A spring 9 is sleeved on the outer surface of the connecting rod 6, and both ends of the spring 9 are fixedly connected to the negative pressure cylinder 10 and the push plate 5, respectively. By pulling the pull ring 7, the piston head 11 is driven to create negative pressure, achieving automatic oil suction without manual scooping or pouring, thus avoiding direct contact between the oil sample and external tools, preventing contamination. The automatic reset of the spring 9 pushes the oil sample in the negative pressure cylinder 10 to the container body 1, eliminating the manual pushing step. Sampling can be completed by a single person, significantly improving sampling efficiency.

[0023] like Figures 1-2 As shown, the negative pressure cylinder 10 is connected to an oil inlet pipe 3 and an oil guide pipe 12. One end of the oil inlet pipe 3 is equipped with an oil suction head 2. The oil suction head 2 facilitates precise connection to the sampling port of the transformer, reducing oil sample leakage during sampling. The oil inlet pipe 3 and the oil guide pipe 12 have clearly defined functions, respectively undertaking the functions of oil suction and oil delivery, ensuring a clear oil sample delivery path and no cross-contamination, and improving the convenience and standardization of sampling operations.

[0024] like Figures 1-2 As shown, both the oil inlet pipe 3 and the oil guide pipe 12 are equipped with one-way valves 4. The one-way valves 4 can strictly control the one-way flow of the oil sample, prevent the oil sample from flowing back during the sampling process and causing insufficient sampling volume, and at the same time prevent outside air and pollutants from flowing back into the negative pressure cylinder 10 or the barrel 1 through the pipe, effectively ensuring the purity of the oil sample and reducing the risk of secondary pollution.

[0025] like Figures 1-2 As shown, an oil inlet pipe 3 is connected to the barrel body 1, and a threaded cap 15 is threadedly connected to the oil inlet pipe 3. The threaded cap 15 is easy to install and remove, and can be quickly tightened to seal the barrel body 1 after sampling. The cooperation between the oil inlet pipe 3 and the threaded cap 15 achieves the initial sealing of the barrel body 1, reduces the contact area between the oil sample and air, and delays the oxidation and deterioration of the oil sample.

[0026] like Figures 1-2 As shown, a limiting tube 13 is fixedly installed inside the threaded cap 15, and a sealing gasket 14 is provided between the limiting tube 13 and the threaded cap 15. The limiting tube 13 is inserted into the oil inlet pipe 3 to achieve precise positioning of the threaded cap 15 and prevent the threaded cap 15 from loosening or shifting; the sealing gasket 14 fits tightly with the port of the oil inlet pipe 3 to form double protection, significantly enhancing the sealing performance of the container 1 and effectively preventing oil sample leakage during transportation or storage.

[0027] like Figures 2-5As shown, an installation plate 18 is fixedly installed on the inner wall of the oil inlet pipe 3, and a through hole 24 is provided on the installation plate 18. The installation plate 18 provides a stable support for the filter screen 17, ensuring that the filter screen 17 will not shift due to the impact of the oil sample during sampling; the size of the through hole 24 is adapted to the filter screen 17, which not only facilitates the installation and replacement of the filter screen 17, but also ensures that all oil samples flow through the filter screen 17, preventing unfiltered oil samples from directly entering the tank 1.

[0028] like Figures 2-3 As shown, a filter screen 17 is fixedly installed at the bottom of the limiting plate 16, and the filter screen 17 passes through the mounting plate 18 through the through hole 24. The filter screen 17 can effectively intercept impurities such as metal debris and insulating particles in the oil sample, avoiding impurities from interfering with the accuracy of subsequent oil quality detection results such as dielectric loss and chromatography; the design of the filter screen 17 passing through the mounting plate 18 forces the oil sample to pass through the filtration process, ensuring the reliability and comprehensiveness of the filtration effect.

[0029] like Figure 2 As shown, a guide seat 23 is fixedly installed inside the barrel 1. The inclined structure of the guide seat 23 can guide the oil sample to naturally converge towards the oil outlet pipe 21, greatly reducing the amount of oil sample residue at the bottom of the barrel 1 and improving the oil sample utilization rate; at the same time, it avoids the local accumulation of oil sample inside the barrel 1, making the oil sample flow out more smoothly when pouring oil.

[0030] like Figure 2 As shown, the barrel 1 is connected to the lowest area of ​​the guide seat 23 via an oil outlet pipe 21, and a valve 20 is installed on the oil outlet pipe 21. The oil outlet pipe 21, corresponding to the lowest point of the guide seat 23, ensures that the oil sample in the barrel 1 flows out fully, reducing waste; the valve 20 can flexibly adjust the oil outlet speed to prevent the oil sample from flowing out too quickly and causing spillage, while also accurately controlling the output volume to adapt to the sampling needs of different testing instruments and improve the convenience of testing operations.

[0031] like Figures 1-2 As shown, four support legs 22 are fixedly installed at the bottom of the barrel 1. The four evenly distributed support legs 22 enable the barrel 1 to be placed stably on the uneven ground at the transformer site, preventing the barrel 1 from tilting and causing oil sample to spill when sampling or pouring oil. The support legs 22 also raise the bottom of the barrel 1, making it easier for the oil outlet pipe 21 to connect to the sample container, thus improving the safety and convenience of operation.

[0032] Before sampling, pulling the pull ring 7 moves the pull plate 8 outward. The pull plate 8 pulls the push plate 5 inside the negative pressure cylinder 10 through the connecting rod 6 and slides synchronously. The push plate 5 compresses the spring 9 between itself and the negative pressure cylinder 10. At the same time, the piston head 11 on one side of the push plate 5 slides tightly against the inner wall of the negative pressure cylinder 10, so that a negative pressure environment is formed inside the negative pressure cylinder 10. At this time, the one-way valve 4 on the oil inlet pipe 3 opens and the one-way valve 4 on the oil guide pipe 12 closes. The negative pressure acts on the transformer oil port through the oil suction head 2 at one end of the oil inlet pipe 3, and automatically sucks the oil sample into the oil inlet pipe 3. After releasing the pull ring 7, the spring 9 returns to its original position and pushes the push plate 5 and the piston head 11 to slide in opposite directions, pressing the oil sample in the negative pressure cylinder 10 into the barrel 1 through the oil guide pipe 12. The one-way valve 4 of the oil guide pipe 12 opens and the one-way valve 4 of the oil inlet pipe 3 closes to prevent the oil sample from flowing back. The negative pressure drive replaces the traditional open pouring, and the oil sample does not need to come into direct contact with the outside world or tools, effectively avoiding oil sample contamination. Before the oil sample enters the tank 1 through the oil guide pipe 12, it must first pass through the filter screen 17 inside the oil inlet pipe 3. The filter screen 17 is fixed to the bottom of the limiting plate 16 and passes through the through hole 24 on the mounting plate 18. When the oil sample flows through the filter screen 17, metal debris and insulating particles inside the transformer are intercepted by the filter screen 17. The purified oil sample then enters the tank 1. The pre-filtration function of the filter screen 17 removes interfering impurities in the oil sample, preventing impurities from affecting the accuracy of subsequent oil quality testing. The cooperation between the mounting plate 18 and the limiting plate 16 fixes the position of the filter screen 17, preventing the filter screen 17 from shaking during the sampling process and causing filtration failure, thus ensuring filtration stability. After sampling, tighten the threaded cap 15 on the oil inlet pipe 3 of the barrel 1. The sealing gasket 14 inside the threaded cap 15 fits tightly with the port of the oil inlet pipe 3. At the same time, the limiting tube 13 is inserted into the oil inlet pipe 3 to further enhance the sealing effect. The barrel 1 is a sealed design to prevent the oil sample from oxidizing due to contact with air or leaking due to shaking during transportation. The threaded cap 15 is easy to install and remove, taking into account both sealing performance and ease of operation. When the oil sample needs to be exported for testing, open the valve 20 on the oil outlet pipe 21 at the bottom of the barrel 1. The guide seat 23 fixed inside the barrel 1 is designed at an inclination to guide the oil sample to converge towards the oil outlet pipe 21. The oil sample flows out at a uniform speed through the oil outlet pipe 21. The pouring speed can be controlled by adjusting the opening of the valve 20 to prevent the oil sample from flowing out too quickly and causing spillage. The controllable design of the valve 20 prevents spillage and waste when pouring oil, and at the same time facilitates precise control of the export volume, adapting to the sampling needs of different testing instruments.

[0033] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, many elements described herein may have appeared after this disclosure as the technology has evolved.

Claims

1. A sampling bucket for an oil-immersed transformer, comprising a bucket body (1), a limiting plate (16), and a negative pressure cylinder (10), characterized in that, The negative pressure cylinder (10) is internally slidably connected to a push plate (5). A piston head (11) is provided on one side of the push plate (5). A connecting rod (6) is fixedly installed on one side of the push plate (5). One end of the connecting rod (6) extends to the outer end of the negative pressure cylinder (10) and is fixedly installed with a pull plate (8). A pull ring (7) is fixedly installed on the pull plate (8). A spring (9) is sleeved on the outer surface of the connecting rod (6). The two ends of the spring (9) are fixedly connected to the negative pressure cylinder (10) and the push plate (5) respectively.

2. The sampling bucket for oil-immersed transformers according to claim 1, characterized in that, The negative pressure cylinder (10) is connected to an oil inlet pipe (3) and an oil guide pipe (12), and an oil suction head (2) is provided at one end of the oil inlet pipe (3).

3. The sampling bucket for oil-immersed transformers according to claim 2, characterized in that, Both the oil inlet pipe (3) and the oil guide pipe (12) are equipped with one-way valves (4).

4. The sampling bucket for oil-immersed transformers according to claim 1, characterized in that, The barrel body (1) is connected to an oil inlet pipe (3), and a threaded cap (15) is threadedly connected to the oil inlet pipe (3).

5. The sampling bucket for oil-immersed transformers according to claim 4, characterized in that, A limiting tube (13) is fixedly installed inside the threaded cap (15), and a sealing gasket (14) is provided between the limiting tube (13) and the threaded cap (15).

6. The sampling bucket for oil-immersed transformers according to claim 4, characterized in that, An installation plate (18) is fixedly installed on the inner wall of the oil inlet pipe (3), and a through hole (24) is provided on the installation plate (18).

7. The sampling bucket for oil-immersed transformers according to claim 1, characterized in that, A filter screen (17) is fixedly installed at the bottom of the limiting plate (16), and the filter screen (17) passes through the mounting plate (18) through the through hole (24).

8. The sampling bucket for oil-immersed transformers according to claim 1, characterized in that, A guide seat (23) is fixedly installed inside the barrel (1).

9. The sampling bucket for an oil-immersed transformer according to claim 8, characterized in that, The barrel (1) is connected to the lowest area of ​​the guide seat (23) via an oil outlet pipe (21), and a valve (20) is installed on the oil outlet pipe (21).

10. The sampling bucket for an oil-immersed transformer according to claim 1, characterized in that, The bottom of the barrel (1) is fixedly equipped with four support legs (22).

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