Transformer oil sampling device

Abstract

The utility model discloses a sampling device for transformer oil. The sampling device comprises a cylinder barrel, the header pipe and the sampling pipe are respectively arranged at the upper part and the lower part of one side of the cylinder barrel and are respectively communicated with the inner wall of the cylinder barrel through a sampling one-way valve and a header pipe one-way valve; the sample tube and the backflow tube are respectively arranged at the upper part and the lower part of the other side of the cylinder barrel and are respectively communicated with the inner wall of the cylinder barrel through a sample one-way valve and a backflow one-way valve; a piston is arranged at the top of the piston rod and is arranged in the cylinder barrel; the piston rod telescopic driving mechanism is arranged on the outer wall of the cylinder barrel, and the telescopic end is connected with the piston rod.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, and in particular to a transformer oil sampling device. Background Technology

[0002] Transformer oil is an important component of transformers, with three main functions: insulation—transformer oil has a much higher insulation strength than air, which can insulate and maintain the transformer windings, and also prevent objects wetted by it from being corroded by moisture; heat dissipation—transformer oil expands and rises when subjected to the heat generated during transformer operation, forming vertical convection in the oil circuit, which facilitates the dissipation of the heat carried by the transformer oil through the radiator; and arc suppression—oil-immersed switches generate electric arcs when disconnecting electrical loads. High-temperature arcs can cause equipment burnout or overvoltage damage. The highly thermally conductive hydrogen gas produced by the high-temperature decomposition of the arc in the transformer oil can absorb excess heat and conduct it into the oil, thereby extinguishing the arc. When the quality of transformer oil in operation (such as acid value, moisture content, gas component content, and cutoff loss factor) meets the specified quality standards, it can ensure the safe and stable operation of the transformer. If certain qualities of the transformer oil change during operation, it can have minor effects, such as affecting the insulation properties of the insulating oil and accelerating oil aging, thereby affecting the reliability and service life of the equipment (e.g., an increase in moisture content in the transformer oil); or more serious effects, such as a continuous increase in gas components in the transformer oil, indicating a transformer malfunction requiring timely maintenance. Therefore, it is necessary to regularly sample and test the transformer oil. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a transformer oil sampling device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A transformer oil sampling device, comprising:

[0006] Cylinder;

[0007] The main pipe and the sampling pipe are respectively located at the upper and lower parts of one side of the cylinder, and are connected to the inner wall of the cylinder through the sampling check valve and the main pipe check valve, respectively.

[0008] The sample tube and the reflux tube are respectively located at the upper and lower parts of the other side of the cylinder, and are connected to the inner wall of the cylinder through the sample check valve and the reflux check valve, respectively.

[0009] A piston rod with a piston mounted on top, and the piston is located inside the cylinder.

[0010] The piston rod extension and retraction drive mechanism is installed on the outer wall of the cylinder, and its extension and retraction end is connected to the piston rod.

[0011] This utility model also includes a sampling solenoid valve and a reflux solenoid valve. The sampling solenoid valve is installed on the external pipeline of the sample tube, and the reflux solenoid valve is connected between the external pipeline of the sample tube and the external pipeline of the reflux tube, connecting the two external pipelines.

[0012] The piston rod extension and retraction drive mechanism includes:

[0013] An electrically controlled telescopic cylinder is installed on the outer wall of the cylinder barrel;

[0014] Guide rod, vertically installed at the bottom of the cylinder;

[0015] The sliding frame is inserted into the guide rod, with one end connected to the telescopic end of the electrically controlled telescopic cylinder and the other end connected to the bottom of the piston rod.

[0016] The beneficial effects of this utility model are:

[0017] 1. The use of an electrically controlled telescopic cylinder automates the sampling process, reducing the frequency of manual operation and improving sampling efficiency and safety.

[0018] 2. This utility model is designed with a one-way valve to ensure that the oil flows in one direction during the sampling process, avoiding the possibility of the oil sample being contaminated by the outside world, while also maintaining the sealing during the sampling process, preventing dust, shock and light.

[0019] 3. This utility model can effectively drain old oil and introduce new oil samples through the reciprocating motion of the piston, ensuring that each sample is a fresh oil sample, thereby improving the accuracy and reliability of the sampling results.

[0020] 4. This utility model utilizes the design of a return pipeline and a return check valve to return unused oil samples to the inside of the transformer, thus avoiding oil waste.

[0021] 5. The entire sampling process of this utility model is simple and clear, easy to understand and operate, reduces the difficulty of maintenance, and also facilitates daily inspection and maintenance work.

[0022] 6. The design of the parallel reflux pipeline and sample pipeline of this utility model, coupled with the control of the solenoid valve, can quickly remove residual oil samples, speed up the sampling process, and improve work efficiency.

[0023] 7. This utility model not only improves the efficiency and accuracy of sampling, but also ensures the safety and environmental protection of the sampling process, making it a relatively ideal solution for transformer oil sampling. Attached Figure Description

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a diagram showing the positional relationship of the main pipe check valve of this utility model;

[0027] Figure 3 This is a side view of the present invention;

[0028] Figure 4 for Figure 3 AA sectional view. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0030] like Figures 1 to 4 As shown, a transformer oil sampling device includes: a cylinder 1; a main pipe 10 and a sampling pipe 11, respectively disposed at the upper and lower parts of one side of the cylinder 1, and respectively connected to the inner wall of the cylinder 1 through a sampling check valve 12 and a main pipe check valve 13; a sample pipe 3 and a return pipe 5, respectively disposed at the upper and lower parts of the other side of the cylinder 1, and respectively connected to the inner wall of the cylinder 1 through a sample check valve 2 and a return check valve 4; a piston rod 6, with a piston 16 disposed at its top, and the piston 16 disposed inside the cylinder 1; and a piston rod extension and retraction drive mechanism disposed on the outer wall of the cylinder 1, with its extension and retraction end connected to the piston rod 6. This utility model also includes a sampling solenoid valve 14 and a return solenoid valve 15. The sampling solenoid valve 14 is disposed on the outer pipe of the sample pipe 3, and the return solenoid valve 15 is connected between the outer pipe of the sample pipe 3 and the outer pipe of the return pipe 5, connecting the two outer pipes. The piston rod telescopic drive mechanism includes: an electrically controlled telescopic cylinder 9, which is disposed on the outer wall of the cylinder 1; a guide rod 8, which is vertically disposed at the bottom of the cylinder 1; and a sliding frame 7, which is inserted through the guide rod 8, with one end connected to the telescopic end of the electrically controlled telescopic cylinder 9 and the other end connected to the bottom of the piston rod 6.

[0031] In use, the main pipe 10 is connected to the transformer's oil sampling line, and the return pipe 5 is connected to the transformer's oil filling line. During operation, the piston 16 is initially located in the lower part of the cylinder 1. The movement of the electrically controlled telescopic cylinder 9 drives the sliding frame 7 to move, which in turn drives the piston rod 6 to move upward under the guidance of the guide rod 8. This, in turn, drives the piston 16 to move upward. The upward movement of the piston 16 draws the initial transformer oil in the main pipe 10 into the cylinder 1. When the piston 16 moves to the upper part of the cylinder 1, it moves downward. This downward movement of the piston 16 causes the initial transformer oil in the cylinder 1 to be discharged outward from the return pipe 5 and flow back into the transformer. At the same time, the piston 16 draws new transformer oil from the sampling pipe 11 into the cylinder 1. When the piston 16 moves to the lower part, it continues to move upward. This upward movement of the piston 16 discharges the transformer oil in the cylinder 1 from the sample pipe 3, thus achieving sample sampling. Then, the piston 16 moves downward to reset, allowing new oil to be drawn into the cylinder 1 again, awaiting the next sampling process.

[0032] A pipeline is connected in parallel outside the sample tube 3 and the return tube 5. A return solenoid valve 15 is installed on this pipeline. A sampling solenoid valve 14 is installed on the sample tube 3. Before sampling, the sampling solenoid valve 14 is closed first, and then the return solenoid valve 15 is opened. Then the piston 16 rises. When the piston 16 rises, the residual oil from the previous sampling in the cylinder 1 flows back to the return tube 5 through the return solenoid valve 15 and is sent into the transformer. Then, when the piston 16 moves downward, the return solenoid valve 15 closes and the sampling solenoid valve 14 opens. The above process is repeated to complete the sampling.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transformer oil sampling device, characterized in that, include: Cylinder (1); The main pipe (10) and the sampling pipe (11) are respectively located at the upper and lower parts of one side of the cylinder (1), and are connected to the inner wall of the cylinder (1) through the sampling check valve (12) and the main pipe check valve (13); The sample tube (3) and the reflux tube (5) are respectively located at the upper and lower parts of the other side of the cylinder (1), and are connected to the inner wall of the cylinder (1) through the sample check valve (2) and the reflux check valve (4); A piston rod (6) has a piston (16) mounted on its top, and the piston (16) is mounted inside the cylinder (1); The piston rod extension and retraction drive mechanism is set on the outer wall of the cylinder (1), and its extension and retraction end is connected to the piston rod (6).

2. The transformer oil sampling device according to claim 1, characterized in that, It also includes a sampling solenoid valve (14) and a reflux solenoid valve (15). The sampling solenoid valve (14) is installed on the external pipeline of the sample tube (3), and the reflux solenoid valve (15) is connected between the external pipeline of the sample tube (3) and the external pipeline of the reflux tube (5) to connect the two external pipelines.

3. The transformer oil sampling device according to claim 1, characterized in that, The piston rod extension and retraction drive mechanism includes: An electrically controlled telescopic cylinder (9) is installed on the outer wall of the cylinder barrel (1); Guide rod (8) is vertically positioned at the bottom of cylinder (1); The sliding frame (7) is inserted on the guide rod (8), with one end connected to the telescopic end of the electrically controlled telescopic cylinder (9) and the other end connected to the bottom of the piston rod (6).

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