Transformer oil sampling tool and transformer oil sampling system

Abstract

The utility model provides a transformer oil sampling tool and a transformer oil sampling system. The oil sampling tool for the transformer is used for being connected between the transformer (T) and an oil sampling bottle (B) so as to collect an oil sample from the transformer (T) into the oil sampling bottle (B), and comprises a vacuum pump (P), an oil sampling device and a sampling device, the downstream pipeline (11) is connected between the vacuum pump (P) and the oil sample bottle (B); the upstream pipeline (12) is connected between the oil sample bottle (B) and the transformer (T); the downstream pipeline control unit (15) is connected to the downstream pipeline (11) to control the on-off of the downstream pipeline (11); the upstream pipeline control unit (16) is connected to the upstream pipeline (12) to control the on-off of the upstream pipeline (12), and the first negative pressure generated by the vacuum pump (P) enables the second negative pressure formed in the oil sample bottle (B) to be lower than the third negative pressure formed in the transformer (T). The risk that the transformer sucks air in the sampling process is avoided.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of transformers, and particularly relates to a transformer oil sampling tooling and a transformer oil sampling system. Background Art

[0002] The nitrogen-filled sealed transformer is an oil-immersed transformer, including a sealed oil tank and a transformer body disposed in the oil tank. The oil tank contains transformer oil (insulating oil), and the transformer body is immersed in the transformer oil to achieve insulation of the high-voltage components of the transformer. In order to ensure the insulation performance of the transformer oil, it is necessary to sample and detect the transformer oil.

[0003] In the existing operation, usually an oil sample bottle is connected to the transformer sampling valve to release the transformer oil. When the temperature is low, the nitrogen-filled sealed transformer will form a negative pressure. At this time, if the transformer oil sampling valve is opened, the transformer will suck in air, making it impossible to complete the oil sampling and causing great damage to the transformer. Summary of the Utility Model

[0004] The technical problem to be solved by the present disclosure is to provide a transformer oil sampling tooling and a transformer oil sampling system that can avoid the risk of the transformer sucking in air during the sampling process.

[0005] To solve the above technical problem, according to one aspect of the present disclosure, there is provided a transformer oil sampling tooling for connecting between a transformer and an oil sample bottle to collect an oil sample from the transformer into the oil sample bottle, characterized in that it includes: a vacuum pump; a downstream pipeline connected between the vacuum pump and the oil sample bottle; an upstream pipeline connected between the oil sample bottle and the transformer; a downstream pipeline control unit connected to the downstream pipeline to control the on-off of the downstream pipeline; an upstream pipeline control unit connected to the upstream pipeline to control the on-off of the upstream pipeline, wherein a first negative pressure generated by the vacuum pump can make a second negative pressure formed in the oil sample bottle lower than a third negative pressure formed in the transformer.

[0006] In the present disclosure, due to the provision of a vacuum pump, a downstream pipeline control unit connected between the oil sample bottle and the vacuum pump through the downstream pipeline, and an upstream pipeline control unit connected between the transformer and the oil sample bottle through the downstream pipeline, the transformer oil sampling tooling can generate a negative pressure (the first negative pressure), and the negative pressure (the second negative pressure) in the oil sample bottle can be lower than the internal negative pressure (the third negative pressure) of the transformer. In this way, the oil sample from the transformer can be drained outwards and collected into the oil sample bottle through the pressure difference between the oil sample bottle and the transformer, thereby successfully completing the transformer oil sampling work and avoiding the risk of the transformer sucking in air during the sampling process.

[0007] Further, the downstream pipeline control unit includes: a downstream connector connected to the downstream pipeline, having a first downstream connector communication port, a second downstream connector communication port, and a third downstream connector communication port. Among them, the first downstream connector communication port is connected to the vacuum pump, and the third downstream connector communication port is connected to the oil sample bottle; a first downstream valve connected along the downstream pipeline between the first downstream connector communication port and the vacuum pump; a downstream pressure gauge connected to the second downstream connector communication port.

[0008] In this embodiment, the operation of the first downstream valve can be controlled according to the pressure indicated by the downstream pressure gauge, which is more convenient to operate and more accurate to control.

[0009] Further, the downstream connector further includes a fourth downstream connector communication port; the downstream pipeline control unit further includes: a second downstream valve connected along the downstream pipeline between the oil sample bottle and the third downstream connector communication port; a third downstream valve connected to the fourth downstream connector communication port.

[0010] In this embodiment, the third downstream valve can be used as a pressure relief valve, and through the cooperation with the first downstream valve and the second downstream valve, the pressure relief of the transformer oil sampling tooling is realized.

[0011] Further, the third downstream valve has a first end and a second end, the first end is connected to the fourth downstream connector communication port, and the second end is connected with a pressure relief hose.

[0012] In this embodiment, through the pressure relief hose, the pressure relief operation of the transformer oil sampling tooling can be made more convenient.

[0013] Further, a transparent observation window is provided on the connecting pipe section of the downstream pipeline between the oil sample bottle and the downstream pipeline control unit.

[0014] In this embodiment, by providing the transparent observation window, the operator can notice in time that the oil sample bottle has completed the oil sample collection and operate the downstream pipeline control unit to disconnect the downstream pipeline in time, which helps to complete the sampling operation smoothly.

[0015] Further, the upstream pipeline control unit includes: an upstream connector connected to the upstream pipeline, having a first upstream connector communication port, a second upstream connector communication port, and a third upstream connector communication port. Among them, the first upstream connector communication port is connected to the oil sample bottle, and the third upstream connector communication port is connected to the transformer; a first upstream valve connected along the upstream pipeline between the first upstream connector communication port and the oil sample bottle; an upstream pressure gauge connected to the second upstream connector communication port.

[0016] In this embodiment, under different connection states, the value of the upstream pressure gauge remaining unchanged can reflect the effective pressure inside the transformer or the internal pressure of the oil sample bottle, and the change in the value can reflect the progress state of the sampling operation. Therefore, the operations of the downstream pipeline control unit and the upstream first valve can be controlled according to the pressure indicated by the upstream pressure gauge to ensure the smooth completion of the sampling operation.

[0017] Further, the upstream pipeline control unit further includes: an upstream second valve, which is connected between the transformer and the third communication port of the upstream connector along the upstream pipeline.

[0018] In this embodiment, the upstream second valve and the upstream first valve cooperate to enable the value of the upstream pressure gauge to conveniently reflect the effective pressure inside the transformer or the internal pressure of the oil sample bottle.

[0019] Further, the connecting pipe section of the downstream pipeline between the oil sample bottle and the downstream pipeline control unit is a rigid connecting pipe section, and the connecting pipe section of the downstream pipeline between the downstream pipeline control unit and the vacuum pump is a flexible connecting pipe section; and / or, the connecting pipe section of the upstream pipeline between the oil sample bottle and the upstream pipeline control unit is a rigid connecting pipe section, and the connecting pipe section of the upstream pipeline between the upstream pipeline control unit and the transformer is a flexible connecting pipe section.

[0020] In this embodiment, the rigid connecting pipeline makes the entire transformer oil sampling tooling have good integrity, and the flexible connecting pipeline makes the transformer oil sampling tooling have connection flexibility.

[0021] Further, the flexible connecting pipe section of the downstream pipeline and / or the flexible connecting pipe section of the upstream pipeline is a transparent hose.

[0022] In this embodiment, using a transparent hose to form the flexible connecting pipe section facilitates the operator to observe the sampling operation process and take corresponding operations in a timely manner, which helps to smoothly complete the sampling operation.

[0023] According to another aspect of the present disclosure, there is provided a transformer oil sampling system, characterized in that it includes: a transformer, having a transformer main body and a transformer oil tank, the transformer main body is arranged inside the transformer oil tank, and a transformer oil sample valve is arranged outside the transformer oil tank; an oil sample bottle; and the transformer oil sampling tooling according to any one of the foregoing items, wherein the upstream end of the upstream pipeline of the transformer oil sampling tooling is connected to the transformer oil sample valve, the downstream end of the upstream pipeline of the transformer oil sampling tooling is inserted into the first height position inside the oil sample bottle, the upstream end of the downstream pipeline of the transformer oil sampling tooling is inserted into the second height position inside the oil sample bottle, and the second height position is higher than the first height position.

[0024] In the present disclosure, the transformer oil sampling system adopts a transformer oil sampling tooling with a vacuum pump, which can successfully complete the transformer oil sampling work and avoid the risk of the transformer inhaling air during the sampling process. Description of the Drawings

[0025] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The schematic embodiments and descriptions thereof of the present disclosure are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0026] Figure 1 is a schematic diagram of a transformer oil sampling system according to an embodiment of the present disclosure, which shows the composition of the transformer oil sampling system and the connection relationship between the transformer oil sampling tooling, the transformer, and the oil sample bottle therein.

[0027] Description of the Reference Numerals in the Drawings:

[0028] 100, transformer oil sampling tooling;

[0029] 11, downstream pipeline;

[0030] 12, upstream pipeline;

[0031] 13, transparent observation window;

[0032] 15, downstream pipeline control unit;

[0033] 151, downstream communicating vessel; 152, downstream pressure gauge;

[0034] 15V1, downstream first valve; 15V2, downstream second valve; 15V3, downstream third valve;

[0035] 16, upstream pipeline control unit;

[0036] 161, upstream communicating vessel; 162, upstream pressure gauge;

[0037] 16V1, upstream first valve; 16V2, upstream second valve;

[0038] B, oil sample bottle;

[0039] P, vacuum pump;

[0040] T, transformer; TV, transformer oil sample valve. Detailed Embodiments

[0041] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present disclosure or its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form.

[0043] Figure 1 is a schematic diagram of a transformer oil sampling system according to an embodiment of the present disclosure, which shows the composition of the transformer oil sampling system and the connection relationship between the transformer oil sampling tooling and the transformer and the oil sample bottle therein.

[0044] See Figure 1 , it can be seen that in this embodiment of the present disclosure, the transformer oil sampling tooling 100 is used to connect between the transformer T and the oil sample bottle B to collect the oil sample from the transformer T into the oil sample bottle B.

[0045] Among them, the transformer oil sampling tooling includes: a vacuum pump P, a downstream pipeline 11 connected between the vacuum pump P and the oil sample bottle B, an upstream pipeline 12 connected between the oil sample bottle B and the transformer T, a downstream pipeline control unit 15 connected to the downstream pipeline 11, and an upstream pipeline control unit 16 connected to the upstream pipeline 12.

[0046] Among them, the transformer T has a transformer body and a transformer oil tank. The transformer body is arranged in the transformer oil tank, and a transformer oil sample valve TV is arranged outside the transformer oil tank.

[0047] Among them, the upstream end of the upstream pipeline 12 of the transformer oil sampling tooling is connected to the transformer oil sample valve TV, the downstream end of the upstream pipeline 12 of the transformer oil sampling tooling is inserted into the first height position inside the oil sample bottle B, the upstream end of the downstream pipeline 11 of the transformer oil sampling tooling is inserted into the second height position inside the oil sample bottle B, and the second height position is higher than the first height position.

[0048] Among them, the downstream pipeline control unit 15 is used to control the on-off of the downstream pipeline 11. The upstream pipeline control unit 16 is used to control the on-off of the upstream pipeline 12.

[0049] Among them, the first negative pressure generated by the vacuum pump P can make the second negative pressure formed in the oil sample bottle B lower than the third negative pressure formed in the transformer T.

[0050] In this disclosure, due to the provision of the vacuum pump P, the downstream pipeline control unit 15 connected between the oil sample bottle B and the vacuum pump P through the downstream pipeline 11, and the upstream pipeline control unit 16 connected between the transformer T and the oil sample bottle B through the upstream pipeline 12, the transformer oil sampling tooling can generate a negative pressure (the first negative pressure), and the negative pressure (the second negative pressure) in the oil sample bottle B can be lower than the internal negative pressure (the third negative pressure) of the transformer. In this way, the oil sample from the transformer can be drained outwards and collected in the oil sample bottle through the pressure difference between the oil sample bottle B and the transformer T, so as to successfully complete the transformer oil sampling work, and at the same time avoid the risk of the transformer inhaling air during the sampling process.

[0051] In this disclosure, the upstream end of the downstream pipeline 11 of the transformer oil sampling tooling is inserted into the second height position inside the oil sample bottle B, which is higher than the downstream end of the upstream pipeline 12 of the transformer oil sampling tooling inserted into the first height position inside the oil sample bottle B, which enables the oil sample bottle to collect a sufficient predetermined amount of oil sample.

[0052] Continue to refer to Figure 1 and it can be seen that the downstream pipeline control unit 15 includes a downstream communicating vessel 151, a downstream first valve 15V1, a downstream pressure gauge 152, a downstream second valve 15V2 and a downstream third valve 15V3.

[0053] It can be seen that among them, the downstream communicating vessel 151 is a four-way pipe connected to the downstream pipeline 11, having a downstream communicating vessel first connection port, a downstream communicating vessel second connection port, a downstream communicating vessel third connection port and a downstream communicating vessel fourth connection port. Among them, the downstream communicating vessel first connection port is connected to the downstream first valve 15V1 and then connected to the vacuum pump P, the downstream communicating vessel second connection port is connected to the downstream pressure gauge 152, the downstream communicating vessel third connection port is connected to the downstream second valve 15V2 and then connected to the oil sample bottle B; the downstream communicating vessel fourth connection port is connected to the downstream third valve 15V3. In this way, the downstream first valve 15V1 is connected between the downstream communicating vessel first connection port and the vacuum pump P along the downstream pipeline 11, and the downstream second valve 15V2 is connected between the oil sample bottle B and the downstream communicating vessel third connection port along the downstream pipeline 11.

[0054] In this embodiment, the operation of the downstream first valve 15V1 can be controlled according to the pressure shown by the downstream pressure gauge 152, with more convenient operation and more accurate control.

[0055] In this embodiment, the downstream third valve 15V3 can be used as a pressure relief valve. For example, when the upstream pipeline control unit 16 disconnects the upstream pipeline 12, the pressure relief of the transformer oil sampling tooling can be achieved by closing the downstream first valve 15V1 and opening the downstream second valve 15V2. After the pressure relief is completed, the oil sample bottle B can be disassembled, and the removed oil sample bottle can be sealed and marked with an oil sample label.

[0056] It can also be seen from Figure 1 that the downstream third valve 15V3 has a first end and a second end. The first end is connected to the fourth communication port of the downstream connector, and the second end can be connected with a pressure relief hose.

[0057] In this embodiment, through the pressure relief hose, the pressure relief operation of the transformer oil sampling tooling can be made more convenient.

[0058] It can also be seen from Figure 1 that a transparent observation window 13 is provided on the connecting pipe section of the downstream pipeline between the oil sample bottle B and the downstream pipeline control unit 15.

[0059] In this embodiment, by providing the transparent observation window 13, the operator can notice in time that the oil sample bottle has completed the oil sample collection and operate the downstream pipeline control unit 15 to disconnect the downstream pipeline 11 in time, which helps to smoothly complete the sampling operation.

[0060] In another embodiment not shown, the pressure relief valve (downstream third valve 15V3) may not be provided. Correspondingly, the downstream connector 151 can be a tee pipe. In addition, the downstream second valve 15V2 may not be provided, but instead the third communication port of the downstream connector can be directly connected to the transparent observation window 4, or the third communication port of the downstream connector can be directly connected to the oil sample bottle B.

[0061] Continuing to refer to Figure 1 , it can be seen that the upstream pipeline control unit 16 includes an upstream connector 161, an upstream first valve 16V1, an upstream pressure gauge 162, and an upstream second valve 16V2. Among them, the upstream connector 161 is a tee pipe connected to the upstream pipeline 12, and has an upstream connector first communication port, an upstream connector second communication port, and an upstream connector third communication port. Among them, the upstream connector first communication port is connected to the oil sample bottle B, the upstream connector second communication port is connected to the upstream pressure gauge 162, and the upstream connector third communication port is connected to the transformer T. In this way, the upstream first valve 16V1 is connected between the upstream connector first communication port and the oil sample bottle B along the upstream pipeline 12, and the upstream second valve 16V2 is connected between the transformer T and the upstream connector third communication port along the upstream pipeline 12.

[0062] In this embodiment, before sampling, with the upstream first valve 16V1 closed and the upstream second valve 16V2 and the transformer oil sample valve TV open, the value of the upstream pressure gauge 162 represents the pressure inside the transformer. Additionally, during the sampling process, when the upstream pipeline control unit 16 disconnects the upstream pipeline 12, the upstream first valve 16V1 and the upstream second valve 16V2 are opened, and the transformer oil sample valve TV is opened. The transformer oil in the transformer oil tank is introduced into the oil sample bottle B under the negative pressure of the oil sample bottle B. During this process, the pressure change of the upstream pressure gauge 162 indicates that sampling is in progress. When the value of the upstream pressure gauge 162 remains unchanged, it means that the pressure at this time is the effective pressure inside the transformer. Therefore, under different connection states, the unchanged value of the upstream pressure gauge 162 can reflect the effective pressure inside the transformer or the internal pressure of the oil sample bottle, and the value change can reflect the progress state of the sampling operation. Therefore, during the sampling process, the operation of the downstream pipeline control unit 15 and the operation of the upstream first valve 16V1 can be controlled based on the pressure shown by the upstream pressure gauge 162 and in combination with the pressure of the downstream pressure gauge 152 to ensure the smooth completion of the sampling operation.

[0063] In this embodiment, the upstream second valve 16V2 cooperates with the upstream first valve 16V1, enabling the value of the upstream pressure gauge 162 to conveniently reflect the effective pressure inside the transformer or the internal pressure of the oil sample bottle.

[0064] In another embodiment not shown, only one of the upstream first valve 16V1 and the upstream second valve 16V2 can be provided, that is, only the upstream first valve 16V1 or only the upstream second valve 16V2 can be provided to simplify the structure.

[0065] Continue to refer to Figure 1 , in the embodiments of the present disclosure, the downstream pipeline 11 and the upstream pipeline 12 can be configured as follows: The connecting pipe section of the downstream pipeline 11 between the oil sample bottle B and the downstream pipeline control unit 15 is a rigid connecting pipe section, and the connecting pipe section of the downstream pipeline 11 between the downstream pipeline control unit 15 and the vacuum pump P is a flexible connecting pipe section; and / or, the connecting pipe section of the upstream pipeline 12 between the oil sample bottle B and the upstream pipeline control unit 16 is a rigid connecting pipe section, and the connecting pipe section of the upstream pipeline 12 between the upstream pipeline control unit 16 and the transformer T is a flexible connecting pipe section.

[0066] In this embodiment, the rigid connecting pipeline enables the entire transformer oil sampling tooling to have good integrity, and the flexible connecting pipeline enables the transformer oil sampling tooling to have connection flexibility.

[0067] Among them, as an implementation manner, the flexible connecting pipe section of the downstream pipeline 11 and / or the flexible connecting pipe section of the upstream pipeline 12 is a transparent hose.

[0068] In this embodiment, a transparent hose is used to form a flexible connection pipe section, which facilitates the operator to observe the sampling operation process and take corresponding operations in a timely manner, and helps to successfully complete the sampling operation.

[0069] The following combines Figure 1 to specifically describe the operation process of the transformer oil sampling tooling and the transformer oil sampling system of the present disclosure.

[0070] Step 1: Open the protective cap on the transformer oil sample valve TV.

[0071] Step 2: Connect one end of the transparent hose to the transformer oil sample valve TV. The inner diameter of the hose is preferably 5-8 mm.

[0072] Step 3: Connect the second end of the transparent hose to the upstream second valve 16V2. Note: At this time, all the valves of the transformer oil sampling tooling are in the closed state, and the cleanliness of the transformer oil sampling tooling and the oil sample bottle should meet the requirements.

[0073] Step 4: Open the downstream first valve 15V1 and the downstream second valve 15V2, and start the vacuum pump.

[0074] Step 5: Observe the value of the downstream pressure gauge 152. When the predetermined negative pressure value (the first negative pressure, such as -0.03 Mpa) is reached, close the downstream first valve 15V1. Note: It is necessary to prevent the transformer oil from entering the vacuum pump P.

[0075] Step 6: Open the upstream first valve 16V1 and the downstream second valve 16V2, and open the transformer oil sample valve TV. At this time, the transformer oil will flow out from the transformer T to the oil sample bottle B. At this time, observe the value of the upstream pressure gauge 162. If the value remains unchanged, it means that this pressure is the effective pressure inside the transformer. If the value of the pressure gauge 9 remains unchanged and no transformer oil is seen in the transparent observation window 13, the upstream first valve 16V1 needs to be closed, the downstream first valve 15V1 needs to be opened, and the vacuum pump P needs to be started. Steps 5 and 6 can be repeated multiple times until transformer oil is observed in the transparent observation window 13. At this time, immediately close the upstream second valve 16V2 and the downstream second valve 15V2, and close the transformer oil sample valve.

[0076] Step 7: Open the downstream third valve 15V3 to relieve the pressure of the transformer oil sampling tooling 100. Then, disassemble the oil sample bottle B, immediately seal the removed oil sample bottle, and mark the oil sample on the oil sample bottle.

[0077] Step 8: Disassemble the transformer oil sampling tooling, restore the transformer oil sample valve to its original state, reasonably dispose of the waste oil, and clean the site.

[0078] During the sampling process, if it is found that the oil sample bottle needs to be cleaned, the upstream second valve 16V2 and the downstream first valve 15V1 can be closed, and then the oil sample bottle can be disassembled and rinsed.

[0079] The present disclosure has the following beneficial effects:

[0080] 1. For the transformer oil sampling tooling and the transformer oil sampling system of the present disclosure, through the negative pressure generated by the vacuum pump, the transformer oil sampling work can be successfully completed, and at the same time, the risk of the transformer inhaling air during the sampling process can be avoided.

[0081] 2. When the upstream first valve 16V1 is closed, the value shown in the downstream pressure gauge 152 is the internal pressure of the oil sample bottle, which can be controlled and adjusted by the downstream first valve 15V1, the downstream second valve 15V2, and / or the downstream third valve 15V3. When the upstream second valve 16V2 is opened, the upstream pressure gauge 162 can display the internal pressure state of the transformer T. By comparing the pressure differences of the two pressure gauges, the flow rate of the transformer oil and the quality of the oil sample can be accurately controlled when taking the oil sample. Excessive negative pressure will affect the quality of the taken oil sample, and the solution of the present disclosure can accurately control the sampling pressure, thereby ensuring the quality of the taken oil sample.

[0082] The above are only the preferred embodiments of the present disclosure. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present disclosure, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present disclosure.

Claims

1. Transformer oil sampling tooling, which is used to be connected between a transformer (T) and an oil sample bottle (B) to collect an oil sample from the transformer (T) into the oil sample bottle (B), characterized in that, Comprising: Vacuum pump (P); Downstream pipeline (11), connected between the vacuum pump (P) and the oil sample bottle (B); Upstream pipeline (12), connected between the oil sample bottle (B) and the transformer (T); Downstream pipeline control unit (15), connected to the downstream pipeline (11) to control the on / off of the downstream pipeline (11); Upstream pipeline control unit (16), connected to the upstream pipeline (12) to control the on / off of the upstream pipeline (12), wherein, the first negative pressure generated by the vacuum pump (P) can make the second negative pressure formed in the oil sample bottle (B) lower than the third negative pressure formed in the transformer (T).

2. The transformer oil sampling tooling according to claim 1, characterized in that The downstream pipeline control unit (15) includes: Downstream connector (151), connected to the downstream pipeline (11), having a first downstream connector communication port, a second downstream connector communication port, and a third downstream connector communication port, wherein the first downstream connector communication port is connected to the vacuum pump (P), and the third downstream connector communication port is connected to the oil sample bottle (B); Downstream first valve (15V1), connected along the downstream pipeline (11) between the first downstream connector communication port and the vacuum pump (P); Downstream pressure gauge (152), connected to the second downstream connector communication port.

3. The transformer oil sampling tooling according to claim 2, characterized in that the downstream connector (151) further includes a fourth downstream connector communication port; the downstream pipeline control unit (15) further includes: Downstream second valve (15V2), connected along the downstream pipeline (11) between the oil sample bottle (B) and the third downstream connector communication port; Downstream third valve (15V3), connected to the fourth downstream connector communication port.

4. The transformer oil sampling tooling according to claim 3, characterized in that the downstream third valve (15V3) has a first end and a second end, the first end is connected to the fourth downstream connector communication port, and the second end is connected with a pressure relief hose.

5. The transformer oil sampling tooling according to claim 2, characterized in that a transparent observation window (13) is provided on the connecting pipe section of the downstream pipeline between the oil sample bottle (B) and the downstream pipeline control unit (15).

6. The transformer oil sampling tooling according to claim 1, characterized in that, The upstream pipeline control unit (16) includes: Upstream connector (161), connected to the upstream pipeline (12), having a first upstream connector communication port, a second upstream connector communication port, and a third upstream connector communication port, wherein the first upstream connector communication port is connected to the oil sample bottle (B), and the third upstream connector communication port is connected to the transformer (T); Upstream first valve (16V1), connected along the upstream pipeline (12) between the first upstream connector communication port and the oil sample bottle (B); Upstream pressure gauge (162), connected to the second upstream connector communication port.

7. The transformer oil sampling tooling according to claim 6, characterized in that, The upstream pipeline control unit (16) further includes: The upstream second valve (16V2) is connected between the transformer (T) and the third communication port of the upstream connector along the upstream pipeline (12).

8. The transformer oil sampling tooling according to claim 1, characterized in that the connecting pipe section of the downstream pipeline (11) between the oil sampling bottle (B) and the downstream pipeline control unit (15) is a rigid connecting pipe section, and the connecting pipe section of the downstream pipeline (11) between the downstream pipeline control unit (15) and the vacuum pump (P) is a flexible connecting pipe section; and / or the connecting pipe section of the upstream pipeline (12) between the oil sampling bottle (B) and the upstream pipeline control unit (16) is a rigid connecting pipe section, and the connecting pipe section of the upstream pipeline (12) between the upstream pipeline control unit (16) and the transformer (T) is a flexible connecting pipe section.

9. The transformer oil sampling tooling according to claim 8, characterized in that the flexible connecting pipe section of the downstream pipeline (11) and / or the flexible connecting pipe section of the upstream pipeline (12) is a transparent hose.

10. Transformer oil sampling system, characterized in that, Comprising: a transformer (T) having a transformer body and a transformer oil tank, the transformer body being disposed within the transformer oil tank, and a transformer oil sampling valve (TV) being disposed outside the transformer oil tank; an oil sampling bottle (B); and the transformer oil sampling tooling according to any one of claims 1 to 8, wherein the upstream end of the upstream pipeline (12) of the transformer oil sampling tooling is connected to the transformer oil sampling valve (TV), the downstream end of the upstream pipeline (12) of the transformer oil sampling tooling is inserted into the first height position within the oil sampling bottle (B), the upstream end of the downstream pipeline (11) of the transformer oil sampling tooling is inserted into the second height position within the oil sampling bottle (B), and the second height position is higher than the first height position.

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