Automatic oil collector for oil sampling of transformer

Abstract

The utility model discloses an automatic oil collector for oil sampling of a transformer, belongs to the field of testing equipment of oil-filled equipment, and particularly relates to a full-sealed automatic oil collector for oil sampling of oil-filled electrical equipment. Comprising an oil inlet, an oil collecting barrel, a siphon oil duct partition plate, a ventilation groove, a sealing plug, an oil discharge seam, an oil discharge outlet, a piston and a piston handle. Through the design, the oil sampling equipment is provided, the oil sampling operation can be more simplified, and transformer oil in the transformer is emptied through the oil pressure and siphonage of the transformer; the equipment structure is simple, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of oil-filled equipment testing equipment, in particular to a fully sealed automatic oil collector for oil-filled electrical equipment. Background Art

[0002] At present, oil-filled electrical equipment is still widely used in power systems. Sampling tests are carried out on the insulating oil filled inside within the prescribed test period. Using gas chromatography to analyze the content of dissolved gas components in the insulating oil to evaluate the internal operating status of the equipment is a key means to determine whether its operating status is good. The accuracy of the results closely affects the analysis and diagnosis of fault conditions.

[0003] In the existing fully sealed oil sampling technology for oil-filled electrical equipment, such as a universal sealed oil sampling device for transformers disclosed in CN214844224U, the sampling steps are very complicated and require multiple steps. The specific operation steps are as follows:

[0004] 1. Dismantle the protective casing of the oil sampling valve of the equipment transformer;

[0005] 2. Clean the outer surface of the sampling valve of the transformer oil sampling port;

[0006] 3. Select the corresponding connector according to the nut inside the sampling valve of the transformer oil sampling port;

[0007] 4. Select the corresponding operating lever according to the outer nut of the sampling valve of the transformer oil sampling port;

[0008] 5. Connect the joint and the oil sampling device equipped with the corresponding operating lever;

[0009] 6. Connect the pipe to the waste oil barrel at the "waste oil drain port" end of the three-way valve;

[0010] 7. Select the "drain oil" state of the three-way valve;

[0011] 8. Use the operating lever to open the outer nut of the transformer oil sampling port sampling valve, and watch the oil slowly flow out into the waste oil barrel through the observation window;

[0012] 9. Connect the sampling syringe to the "pinhole sampling port" of the three-way valve;

[0013] 10. Select the "sampling" state of the three-way valve;

[0014] 11. Use a sampling syringe to connect the three-way valve "pinhole sampling port" for sampling operation. When replacing the sampling syringe, the three-way valve should be selected to the "closed" state;

[0015] 12. After sampling, first use the operating lever to close the outer nut of the transformer oil sampling port sampling valve, and then drain the oil from the corresponding joint pipe oil and air discharge port 203 and the guide tube oil and air discharge port 502b;

[0016] 13. Remove the sampling device.

[0017] In actual production operations, medical three-way valves are generally used for oil sampling of fully sealed oil-filled electrical equipment. The sampling steps are as follows:

[0018] Drain dead oil: Move the medical three-way valve to the upper bypass position to drain the dead oil trapped near the transformer sampling valve.

[0019] Clean the syringe: turn the medical three-way valve to the straight-through position, fill the syringe with oil, and then turn the medical three-way valve to the lower bypass position to drain the oil in the syringe. Repeat this step 3 times.

[0020] Take oil sample: Cut the medical three-way valve to the straight-through position and use a syringe to take out a qualified oil sample.

[0021] The entire sampling process requires operating the medical three-way valve 8 times, which is cumbersome and prone to errors.

[0022] Therefore, it is necessary to design a new type of oil sampling and oil collector to eliminate the three-way valve, reduce the operating steps, improve efficiency, and avoid mistakes.

[0023] Therefore, there is an urgent need for a technical solution to the above problems in the prior art. Utility Model Content

[0024] The technical problem to be solved by the utility model is to provide a device for solving the above-mentioned existing problems.

[0025] An automatic oil collector for taking oil samples from a transformer, characterized by comprising an oil inlet, an oil collecting cylinder, a siphon oil channel partition, an oil discharge port, a piston and a piston handle;

[0026] An oil inlet and an oil outlet are arranged on the outer wall of the oil collecting cylinder;

[0027] A siphon oil passage baffle is provided inside the oil collecting cylinder, and the siphon oil passage baffle divides the inner cavity of the oil collecting cylinder into two cavities, one large and one small. The large cavity is the oil collecting cavity, and the small cavity is the siphon oil passage; the oil inlet is connected to the oil collecting cavity, and the oil outlet is connected to the siphon oil passage;

[0028] A piston with matching shape is arranged in the oil collecting chamber, and the piston is connected to the piston handle;

[0029] The piston handle is fixedly connected to the hollow piston.

[0030] The oil collecting cylinder and the siphon oil passage partition are connected in a fixed manner.

[0031] The distance between one end of the oil collecting cylinder and the oil discharge port is 120 mm.

[0032] The diameter of the oil inlet is smaller than the diameter of the oil outlet.

[0033] The diameter of the oil discharge port is twice the diameter of the oil inlet port.

[0034] The height of the siphon oil passage baffle is 50 mm, the width is 28 mm, and the thickness is 2 mm; and the shape of the side surface of the siphon oil passage baffle matches the shape of the inner wall of the oil collecting barrel.

[0035] The siphon oil channel partition is provided with a ventilation groove and an oil drainage slit; and a closing plug matching the shape of the inner wall of the oil collecting barrel is also provided on the top of the siphon oil channel partition; the ventilation groove and the oil drainage slit are both provided on the top of the siphon oil channel partition; and the ventilation groove has a depth of 1.25 mm, and the width of the oil drainage slit is 26 mm.

[0036] Through the above design scheme, the utility model can bring the following beneficial effects: through the above design, an oil sampling device is provided, which can simplify the oil sampling operation. The device of the present application drains the transformer oil in the transformer through the oil pressure and siphon phenomenon of the transformer itself; the device has a simple structure and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] Figure 1 It is a schematic diagram of the structure of the utility model;

[0039] Figure 2 The structure diagram of the siphon oil channel partition of the utility model is shown in FIG. Figure 1 ;

[0040] Figure 3 The structure diagram of the siphon oil channel partition of the utility model is shown in FIG. Figure 2 ;

[0041] Figure 4 The structure diagram of the siphon oil channel partition of the utility model is shown in FIG. Figure 3 ;

[0042] Among them: 1-oil inlet, 2-oil collecting cylinder, 3-siphon oil channel partition, 301-ventilation groove, 303-closing plug, 302-oil drainage gap, 4-oil drainage port, 5-piston, 6-piston handle. DETAILED DESCRIPTION

[0043] The present application is further described with reference to the accompanying drawings:

[0044] An automatic oil collector for taking oil samples from a transformer, characterized by comprising an oil inlet 1, an oil collecting cylinder 2, a siphon oil channel partition 3, an oil discharge port 4, a piston 5 and a piston handle 6;

[0045] The outer wall of the oil collecting cylinder 2 is provided with an oil inlet 1 and an oil outlet 4;

[0046] The oil collecting cylinder 2 is provided with a siphon oil passage partition 3, and the siphon oil passage partition 3 divides the inner cavity of the oil collecting cylinder 2 into two cavities, one large and one small. The large cavity is the oil collecting cavity, and the small cavity is the siphon oil passage; the oil inlet 1 is connected to the oil collecting cavity, and the oil outlet 4 is connected to the siphon oil passage;

[0047] A piston 5 of matching shape is provided in the oil collecting chamber, and the piston 5 is connected to the piston handle 6;

[0048] The piston handle 6 is fixedly connected to the hollow piston 5 .

[0049] The oil collecting cylinder 2 and the siphon oil passage partition 3 are connected in a fixed manner.

[0050] The distance between one end of the oil collecting cylinder 2 and the oil discharge port 4 is 120 mm.

[0051] The diameter of the oil inlet 1 is smaller than the diameter of the oil outlet 4 .

[0052] The diameter of the oil outlet 4 is twice the diameter of the oil inlet 1 .

[0053] The height of the siphon oil passage baffle 3 is 50 mm, the width is 28 mm, and the thickness is 2 mm; and the shape of the side surface of the siphon oil passage baffle 3 matches the shape of the inner wall of the oil collecting barrel 2 .

[0054] The siphon oil passage baffle 3 is provided with a ventilation groove 301 and an oil drainage slit 302; and a closing plug 303 matching the shape of the inner wall of the oil collecting barrel 2 is also provided on the top of the siphon oil passage baffle 3; the ventilation groove 301 and the oil drainage slit 302 are both provided on the top of the siphon oil passage baffle 3; and the depth of the ventilation groove 301 is 1.25 mm, and the width of the oil drainage slit 302 is 26 mm.

[0055] The hollow piston 5 can slide up and down inside the oil collecting chamber;

[0056] The oil discharge port 4 is arranged on the oil collecting barrel 2, and the oil discharge port 4 is connected to an oil discharge hose, and the other end of the hose is connected to a waste oil bottle. Specifically, the oil discharge port 4 is arranged at a height of 120 mm on the side of the oil collecting barrel 2. The diameter of the oil discharge port 4 is twice the diameter of the oil inlet 1.

[0057] The siphon oil passage partition plate 3 divides the inner cavity of the oil collecting cylinder 2 into an oil collecting cavity and a siphon oil passage through the design of the vent groove 301, the oil drain slit 302 and the closing plug 303, and the oil collecting cavity and the siphon oil passage are connected through the oil drain slit 302;

[0058] The hollow piston 5 is fixedly connected to the piston handle 6; specifically, the cross section of the hollow piston 5 is the same as the cross section of the oil collecting chamber inside the oil collecting barrel 2, but slightly smaller in size. The hollow piston 5 is placed in the oil collecting chamber to ensure that the hollow piston 5 can slide freely inside the oil collecting chamber. The piston handle 6 is fixedly connected to the hollow piston 5; specifically, the piston handle 6 is fixedly connected to the hollow piston 5 at the center of the upper surface of the hollow piston 5.

[0059] The automatic oil collector for oil sampling provided in this application has the following working principle:

[0060] A. First oil filling: Open the sampling valve of the oil filling equipment. The oil in the oil filling equipment enters the oil collecting chamber and siphon oil channel inside the oil collector 2 through the oil inlet 1 under its own pressure. At the same time, the hollow piston 5 rises under the action of the oil.

[0061] B. Automatic oil drainage: When the oil level in the oil collecting barrel 2 rises to a height of more than 120mm, the air in the oil drain hose connected to the siphon oil channel and the oil drain port 4 will be emptied, resulting in a siphon effect. The oil inside the oil collecting barrel 2 will be discharged to the waste oil bottle through the oil drain slit at the bottom of the siphon oil channel partition 3 → siphon oil channel → oil drain hose.

[0062] C. Oil filling again: As the oil inside the oil collecting cylinder 2 decreases, the hollow piston 5 descends. When the hollow piston 5 descends to the point where the upper surface of the bottom of the oil collecting cylinder is lower than the upper edge of the air-permeable groove of the siphon oil passage partition 3, the siphon oil passage begins to ventilate and stops draining oil. The oil in the oil-filled equipment enters the oil collector 2 again under its own pressure.

[0063] Repeating actions A, B, and C can complete the automatic flushing of the oil collector.

[0064] D. Take oil sample: Observe that the oil level inside the oil collecting cylinder 2 reaches the appropriate height, pinch the piston handle 6, and close the sampling valve to complete the oil collection.

[0065] The automatic oil collector for oil sampling provided by the utility model cancels the medical three-way valve, realizes the function of fully sealed oil sampling, simplifies the operation to the greatest extent, improves the efficiency and avoids mistakes.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic oil collector for transformer oil sampling, characterized by: It comprises an oil inlet (1), an oil collecting cylinder (2), a siphon oil passage baffle (3), an oil discharge port (4), a piston (5) and a piston handle (6); An oil inlet (1) and an oil outlet (4) are provided on the outer wall of the oil collecting cylinder (2); A siphon oil passage baffle (3) is arranged inside the oil collecting cylinder (2), and the siphon oil passage baffle (3) divides the inner cavity of the oil collecting cylinder (2) into two cavities, one large and one small, the large cavity being the oil collecting cavity and the small cavity being the siphon oil passage; the oil inlet (1) is connected to the oil collecting cavity, and the oil outlet (4) is connected to the siphon oil passage; A piston (5) of matching shape is arranged in the oil collecting chamber, and the piston (5) is connected to the piston handle (6); The piston handle (6) is fixedly connected to the hollow piston (5).

2. The automatic oil collector for transformer oil sampling according to claim 1 is characterized by: The oil collecting cylinder (2) and the siphon oil passage partition (3) are connected in a fixed manner.

3. The automatic oil collector for transformer oil sampling according to claim 1 is characterized by: The distance between one end of the oil collecting cylinder (2) and the oil discharge port (4) is 120 mm.

4. The automatic oil collector for transformer oil sampling according to claim 1 is characterized by: The diameter of the oil inlet (1) is smaller than the diameter of the oil outlet (4).

5. The automatic oil collector for transformer oil sampling according to claim 4 is characterized by: The diameter of the oil discharge port (4) is twice the diameter of the oil inlet port (1).

6. The automatic oil collector for transformer oil sampling according to claim 1 is characterized by: The siphon oil passage baffle (3) has a height of 50 mm, a width of 28 mm and a thickness of 2 mm; and the shape of the side surface of the siphon oil passage baffle (3) matches the shape of the inner wall of the oil collecting barrel (2).

7. The automatic oil collector for transformer oil sampling according to claim 6 is characterized by: The siphon oil passage baffle (3) is provided with a vent groove (301) and an oil drainage slit (302); and a sealing plug (303) matching the shape of the inner wall of the oil collecting barrel (2) is also provided on the top of the siphon oil passage baffle (3); the vent groove (301) and the oil drainage slit (302) are both provided on the top of the siphon oil passage baffle (3); and the vent groove (301) has a depth of 1.25 mm, and the oil drainage slit (302) has a width of 26 mm.

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