CN218937897U - Fault gas collection device for SF6 gas insulated transformer - Google Patents

Abstract

The utility model discloses a faulty gas collection device for SF ₆ gas insulated transformers, which includes an air-introduction pipe, which is an L-shaped pipe, including a vertical pipe and a horizontal pipe; The bottom of the tube passes through the secondary lead tube and connects with the horizontal tube; the horizontal tube is placed above the metal base; the gas outlet port of the air induction tube is installed at the sampling port of the SF ₆ gas insulated transformer. This device reforms the internal gas channel of the existing SF ₆ gas insulated transformer. The original gas sampling port is installed at the lower part of the SF ₆ gas insulated transformer and the gas is directly discharged from the lower part. Instead, the sampling port is connected with a small diameter tube. It leads to the upper part of the SF ₆ gas insulated transformer through the secondary lead tube at the ground potential, so that the gas sample around the main insulation of the upper part of the SF ₆ gas insulated transformer can be obtained through a small amount of exhaust when sampling the gas, and the test results can be timely and effective It reflects the insulation state of SF ₆ gas insulated transformer.

Description

Fault gas collection device for SF6 gas insulated transformer

technical field

The utility model relates to the technical field of fault gas collection in SF6 gas-insulated transformers, in particular to a fault gas collection device for SF6 gas-insulated transformers.

Background technique

Gas decomposition products can effectively reflect the insulation state of SF ₆ gas-insulated transformers. According to the analysis of 23 faults of 500KVSF ₆ gas-insulated transformers in the existing system, almost all internal discharge faults of SF ₆ gas-insulated transformers will eventually be in the gas Component testing is characterized. However, the height difference _between SF ₆ CT and the upper and lower sides is large, the gas in the gas chamber is relatively fixed _{, and} the gas fluidity is poor in the closed space. There is an adsorbent at the bottom, and when the gas decomposition product is sampled and detected, the data will be too small and affect the judgment. Therefore, it is very important to design a gas collection device that can directly extract the head of the transformer.

For example, the invention whose notification number is CN 104891449 A discloses an on-line gas processing device for electric power SF ₆ transformer and a method for using it. It includes a SF ₆ mutual inductor, the lower part of the SF ₆ mutual inductor is provided with a first opening, the first opening is connected to one end of a suction pipe through a deflation valve, the other end of the suction pipe is connected to the inlet of an air pump, and the air pump The outlet of the outlet is connected to the first branch pipe, the first branch pipe is connected to a main pipe and the second branch pipe respectively, the main pipe is connected to a SF ₆ gas cylinder through a pressure reducing valve, and the second branch pipe is connected to a SF ₆ gas adsorption tank and a buffer tank in turn Connection, the buffer tank is connected with a gas filling pipe through a solenoid valve, a vent valve is arranged on the gas filling pipe, and the gas filling pipe is connected with the second opening opened on the upper part of the SF ₆ transformer through a gas filling connecting pipe and an intake valve. However, the vent valve of this device is at the bottom of the SF ₆ gas-insulated transformer, and the fault gas often gathers at the head of the transformer, which will have a great impact on the accuracy of fault collection results.

Utility model content

In order to solve the above technical problems, the utility model provides a faulty gas collection device, which reforms the internal gas channel of the existing SF ₆ gas insulated transformer, installs the original gas sampling port in the lower part of the SF ₆ gas insulated transformer and directly Outlet the gas from the lower part, connect a small-caliber thin tube to the sampling port, and lead to the upper part of the SF ₆ gas-insulated transformer through the secondary lead tube at the ground potential, so that SF ₆ can be obtained after a small amount of exhaust gas when sampling the gas. The gas sample around the main insulation on the upper part of the gas-insulated transformer, the test result can reflect the insulation state of the SF ₆ gas-insulated transformer in a timely and effective manner.

The utility model specifically discloses a faulty gas collection device for SF6 gas insulated transformers, which includes a gas-inducing pipe body, and the air-inducing pipe is an L-shaped pipe, including a vertical pipe and a horizontal pipe; the vertical pipe is installed through the Inside the secondary lead pipe of the SF ₆ gas insulated transformer, the bottom of the vertical pipe passes through the secondary lead pipe and connects with the horizontal pipe; the horizontal pipe is placed above the metal base; The gas outlet port of the gas pipe is installed at the sampling port of the SF ₆ gas insulated transformer.

Further, the standpipe is arranged in close contact with the inner wall of the secondary lead pipe.

Further, the diameter of the air induction pipe is 1-3mm.

Further, the air induction pipe is an L-shaped pipe with both ends opened.

Further, an air intake hole is opened at the connection position between the side wall of the secondary lead pipe and the top end of the air induction pipe, and the bottom end of the air induction pipe is open.

Further, a check valve is provided at the air outlet port of the air induction pipe.

The beneficial effects of the utility model:

The original gas sampling port is installed at the lower part of the SF ₆ gas insulated transformer and the gas is directly discharged from the lower part. Instead, a small-diameter thin tube is connected to the sampling port, which leads to the SF ₆ gas insulated transformer through the secondary lead tube at ground potential. The upper part, so that the gas sample around the upper main insulation of the SF ₆ gas insulated transformer can be obtained after a small amount of exhaust when sampling the gas, and the test results can reflect the insulation state of the SF ₆ gas insulated transformer in a timely and effective manner;

In this device, a very thin air-inducing tube is attached to the inner wall of the secondary lead-in tube, which can be installed by welding, or even manufactured together with the secondary lead-in tube, so that the structure of the air-inducing tube can not pass through the secondary lead-in tube in the secondary lead-in tube. will have any effect;

In order to better reflect the gas conditions around the external insulation of the secondary lead pipe when taking gas, the gas collection device opens the upper end of the air leading pipe to the side wall of the secondary lead pipe, or connects the side wall of the secondary lead pipe to the side wall of the lead pipe. The welding position on the top of the trachea side is provided with a side air inlet, so that the air inlet of the air induction pipe is closer to the head of the transformer, and the collected fault gas is more in line with the actual situation.

Description of drawings

Figure 1: Overall schematic.

Fig. 2: Schematic diagram of the structure of the secondary lead tube in Embodiment 1.

Fig. 3: Schematic diagram of the structure of the secondary lead tube in Example 2.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the predetermined purpose, the following in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects of the utility model will be described in detail as follows .

It should be noted that in this application, unless otherwise specified, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the components In terms of itself in the vertical, vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refers to the inner and outer relative to the outline of each component itself, but the above-mentioned orientation words are not used to limit This utility model.

Example 1

As shown in Figure 1-2, a faulty gas collection device for SF ₆ gas insulated transformer, including the gas induction pipe 1 installed in the SF ₆ gas insulated transformer, the gas induction pipe 1 is an L-shaped small-diameter thin tube, It consists of vertical pipe 2 and horizontal pipe 3.

The standpipe 2 is installed through the secondary lead pipe 4 of the SF ₆ gas insulated transformer, specifically, the standpipe 2 is arranged on the inner wall of the secondary lead pipe 4 . In this embodiment, the standpipe 2 is installed on the inner wall of the secondary lead pipe 4 by welding, and it can also be installed synchronously during the manufacture of the secondary lead pipe 4 .

The top of the vertical pipe 2 is installed on the upper part of the side wall of the secondary lead pipe 4 , and the bottom end of the vertical pipe 2 passes through the secondary lead pipe 4 and is connected with the horizontal pipe 3 . The horizontal pipe 3 is placed above the metal base 5 .

The air outlet port of the air induction pipe 1 is installed at the sampling port of the SF ₆ gas insulated transformer, and a check valve 7 is installed at the air outlet port of the air induction pipe 1 .

The diameter of the air-inducing pipe 1 ranges from 1 to 3 mm, and the diameter is the peripheral diameter of the air-inducing pipe 1 .

In this embodiment, the air-inducing pipe 1 is an L-shaped pipe with both ends opened. The faulty gas enters from the top of the bleed air pipe 1, is transmitted through the bleed air pipe 1, and is output from the bottom end of the bleed air pipe 1, which is the sampling port of the transformer.

Example 2

As shown in Figure 3, the difference between it and Embodiment 1 is that, in this embodiment, only the bottom end of the air-inducing pipe 1 is open, and the side wall of the secondary lead-in pipe 4 is provided with a side wall at the welding position of the top end of the air-inducing pipe 1 side. The air intake hole 8 sucks the gas from the head of the transformer through the side air intake hole 8, and discharges and collects it from the outlet end of the air intake pipe 1.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not used to limit the utility model. Any Those skilled in the art, without departing from the scope of the technical solution of the present utility model, may use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solution of the utility model According to the technical essence of the utility model, any brief modification, equivalent change and modification made to the above embodiments still belong to the scope of the technical solution of the utility model.

Claims (6)

1. SF (sulfur hexafluoride) application ₆ The fault gas collection device of the gas insulation transformer is characterized by comprising a gas-guiding pipe, wherein the gas-guiding pipe is an L-shaped pipe and comprises a vertical pipe and a horizontal pipe; the vertical pipe is arranged in SF in a penetrating way ₆ The bottom of the vertical pipe penetrates out of the secondary lead pipe and is connected with the horizontal pipe; the horizontal pipe is arranged above the metal base; the air outlet port of the air suction pipe is arranged on the SF ₆ And a sampling port of the gas insulation transformer.

2. A method according to claim 1 for SF ₆ The fault gas collection device of the gas insulation transformer is characterized in that the vertical pipe is attached to the inner wall of the secondary lead pipe.

3. A method according to claim 2 for SF ₆ Fault gas acquisition device of gas insulation transformerIs characterized in that the pipe diameter of the air entraining pipe is 1-3 mm.

4. A method according to claim 3 for SF ₆ The fault gas collection device of the gas insulation transformer is characterized in that the gas-guiding pipe is an L-shaped pipe with two open ends.

5. A method according to claim 3 for SF ₆ The fault gas collection device of the gas insulation transformer is characterized in that an air inlet hole is formed in the connection position between the side wall of the secondary lead pipe and the top end of the air entraining pipe side, and the bottom end of the air entraining pipe is opened.

6. A method according to claim 4 or claim 5 for SF ₆ The fault gas collection device of the gas insulation transformer is characterized in that a check valve is arranged at the outlet port of the air entraining pipe.

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