CN211576691U - Gas taking device for transformer gas - Google Patents

Abstract

The utility model relates to a power grid equipment maintenance technical field, more specifically relates to a gaseous device of getting of transformer gas, including gas sampler, intercommunication valve, grease trap and adapter joint, the intercommunication valve is equipped with the port of being connected with gas sampler and grease trap respectively, still is equipped with the port of connecting external air supply, and the grease trap is connected with adapter joint. The utility model discloses can be fast pollution-free draw the gas, have the strong characteristics of leakproofness simultaneously.

Description

Gas taking device for transformer gas

Technical Field

The utility model relates to a power grid equipment maintenance technical field, more specifically relates to a gaseous device of getting of transformer gas.

Background

When the transformer generates heavy gas action or light gas alarm, the gas decomposed from the transformer oil can be collected in the gas collecting box of the gas relay. In order to correctly judge the fault condition inside the transformer, a tester needs to perform chromatographic test analysis on the gas collected in the gas collection box, but the gas relay gas collection boxes used in various transformer factories are different in model and different in caliber of the air release valves, so that great difficulty is caused in sampling the gas. In order to solve the problem of difficulty in gas taking of gas, a gas taking device needs to be researched and designed, can be used on different gas collecting boxes, is convenient for testers to rapidly collect gas according to regulations, and can timely and accurately judge the running state of the transformer. Meanwhile, gas cannot be mixed into other gas in the sampling process, the sealing performance of pipeline connection in the gas taking process can be fully guaranteed, and the volume of the contained gas can meet the requirement of repeated tests. The transformer oil sample is easy to be mixed into the gas taking device, so that the gas taking device is difficult to clean and dry, and in a chromatographic test, the transformer oil and gas are easy to enter a chromatographic column of a chromatograph together to pollute the chromatographic column. Moreover, carry out gas at present and get gas mainly and adopt glass syringe to collect, gas relay gas collection box is installed in the transformer top more, is getting gas the operation in-process, and the operation personnel need ascend a height the operation, and it is narrow and small to add main top operation space that becomes, uses glass syringe easily to take place the collision and breaks. If a glass injector filled with gas is broken after gas taking is finished, chromatographic analysis tests cannot be carried out, and the opportunity of making correct state judgment on the transformer is lost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art an at least defect, provide a gaseous device of getting of transformer gas, can be fast pollution-free draw the gas, have the strong characteristics of leakproofness simultaneously.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a transformer gas device, wherein, including gas sampler, intercommunication valve, grease trap and adapter coupling, the intercommunication valve is equipped with the port of being connected with gas sampler and grease trap respectively, still is equipped with the port of connecting external air supply, and the grease trap is connected with adapter coupling.

In this scheme, gas sampler, intercommunication valve, grease trap and adapter connect gradually, and the external air supply is connected to the intercommunication valve, and external air supply purifies gas taking device, avoids because the inside gaseous problem of gas taking device causes the sample gas pollution.

In one embodiment, the gas sampler is provided with a cylinder, a piston and a piston rod, the cylinder is provided with an interface connected with a port of the communication valve, the cylinder is provided with a gas taking pipeline communicated with the interface, the gas taking pipeline is connected with the piston in a sliding mode, and the piston is connected with the piston rod.

Preferably, the cylinder is provided with a non-return valve at the interface.

Preferably, the gas sampler is further provided with a limiting piece in threaded connection with the gas taking pipeline.

Preferably, the communication valve is provided with a port A, a port B and a port C, the port A is provided with a thimble, and the port A is detachably connected with the interface.

Preferably, the port B is connected with the oil separator, the external air source is a nitrogen cylinder, and the port C is connected with the nitrogen cylinder.

Preferably, the oil separator is provided with an oil separation shell and a joint, one end of the oil separation shell is connected with the joint through an oil separation pipeline, the other end of the oil separation shell is detachably connected with the adapter joint, and the joint is detachably connected with the port B.

Preferably, a metal clamp is arranged at the joint of the oil separation pipeline, the oil separation shell and the joint.

Preferably, a needle-shaped pipeline connected with the oil separation pipeline is arranged in the oil separation shell, and an oil separation baffle is arranged at the joint of the oil separation shell and the adapter connector.

Preferably, the adapter joint is provided with a sealing ring matched with the air bleeding valve port of the transformer.

Compared with the prior art, the utility model, have following characteristics:

1. before gas is taken, the gas can be connected with an external gas source through a communicating valve to carry out integral cleaning of the device, the gas tightness is ensured, other gases are prevented from being mixed in gas, and the accuracy of a test result is ensured.

2. The oil separator of the gas taking device can avoid mixing into a transformer oil sample, avoid the pollution to a chromatographic column in a chromatographic test and improve the accuracy of a test result.

3. The main parts of the gas taking device are detachably connected, so that the gas taking device is convenient to assemble and disassemble and has the characteristics of use flexibility and strong adaptability.

Drawings

Fig. 1 is a schematic view of the overall structure in the embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a gas sampler according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of the oil separator according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a gas sampler after the sealing cover is installed in the embodiment of the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example (b):

as shown in fig. 1, the utility model provides a gaseous device of getting of transformer gas, including gas sampler 1, intercommunication valve 2, grease trap 3 and adapter 4, intercommunication valve 2 is the three-way valve, be equipped with port A21 respectively, port B22 and port C23, gas sampler 1's drum 9 is equipped with the interface 16 of being connected with port A21, drum 9 is the stainless steel, drum 9 is equipped with the pipeline of getting gas 5 with interface 16 intercommunication, get 5 sliding connection pistons of pipeline of getting gas, the piston is the rubber material, can produce deformation, the external diameter of piston slightly is greater than the internal diameter of getting pipeline of gas 5, the piston with get 5 sealing connection of pipeline of gas 5.

As shown in fig. 2, the piston rod 7 is connected with the piston, and the piston rod 7 is controlled to pull the piston, so that the piston slides relative to the gas taking pipe 5 under the pulling action to draw and discharge the gas.

A check valve 10 is arranged at the joint 16 of the cylinder 9, and the direction of the check valve 10 is to allow gas to enter the gas taking pipeline 5 from the joint 16 and prevent the gas from flowing out of the gas taking pipeline 5 from the joint 16.

As shown in fig. 2, the gas sampler 1 is further provided with a limiting member 8 in threaded connection with the gas intake pipe 5, the limiting member 8 is a knurled screw, the cylinder 9 is provided with a hole in threaded connection with the knurled screw, the hole is directly communicated with the gas intake pipe 5, the limiting member 8 rotates relative to the gas intake pipe 5, position adjustment is performed relative to the gas intake pipe 5, and when the limiting member 8 abuts against the piston rod 7, the moving speed of the piston rod 7 is adjusted.

As shown in fig. 1, the port a21 is provided with a thimble 11, the port a21 is detachably connected to the port 16, and when the port a21 is connected to the port 16, the thimble 11 pushes the check valve 10 at the position of the port 16 open.

The port B22 is connected with the oil separator 3, the external air source is a nitrogen cylinder, and the port C23 is connected with the nitrogen cylinder.

In the present embodiment, as shown in fig. 3, the oil separator 3 is provided with an oil separation housing 17 and a joint 18, one end of the oil separation housing 17 is connected to the joint 18 through an oil separation pipe 13, the other end is detachably connected to the adapter 4, and the joint 18 is detachably connected to the port B22. The oil separation pipeline 13 is a polyethylene plastic hose, and has a small pipe orifice, so that the oil separation function can be realized during gas transmission, and gas is prevented from entering the joint 18.

The metal clamping piece 14 is arranged at the joint of the oil separation pipeline 13, the oil separation shell 17 and the joint 18, and the metal clamping piece 14 is sleeved at the joint of the oil separation pipeline 13, the oil separation shell 17 and the joint 18, so that the air tightness of the connection of the oil separation pipeline 13, the oil separation shell 17 and the joint 18 is improved.

As shown in fig. 3, in the present embodiment, a needle pipe 19 connected to the oil separation pipe 13 is provided in the oil separation housing 17, and the needle pipe 19 has a small bore diameter, allows gas to pass through, and has an oil separation function. The joint of the oil separation shell 17 and the adapter joint 4 is provided with an oil separation baffle 12, the oil separation baffle 12 is connected with the oil separation shell 17 through a connecting rod 20, gas enters the oil separation shell 17, the oil separation baffle 12 blocks oil, and the gas bypasses the oil separation baffle 12 and enters the oil separation pipeline 13 with the oil separation function.

Adapter joint 4 is connected with transformer gassing valve port, and adapter joint 4 plays the transition effect to the connection of oil removal casing 17 and transformer gassing valve port, and adapter joint 4 can be according to the different multiple specifications of preparation of the bore of transformer gassing valve port, and every adapter joint 4 adaptation transformer gassing valve port. The adapter joint 4 is provided with a sealing ring 15 matched with the transformer air release valve port, and the sealing ring 15 increases the air tightness of the adapter joint 4 connected with the transformer air release valve port.

As shown in fig. 4, in this embodiment, a sealing cover 6 connected to the interface 16 is further provided, and the sealing cover 6 only enhances the sealing performance, and has no thimble thereon, so that the check valve 10 cannot be opened.

Before gas taking, the gas sampler 1 is connected with a port A21, a thimble 11 on the communicating valve 2 pushes a check valve 10, a port B22 is connected with one end of an oil separator 3, the other end of the oil separator 3 is connected with one end of an adapter 4, a port C23 is connected with a standard nitrogen bottle, a piston switch of the communicating valve 2 is rotated to enable three ports of the communicating valve 2 to be in an open state, and the device is filled with nitrogen and cleaned for three times. The piston switch of the communicating valve 2 is rotated to close the port C23, the ports A21 and B are opened, the adapter connector 4 is connected to the air release valve port of the transformer, and the gas can pass through the adapter connector 4 and enter the gas sampler 1 through the oil separator 3 and the communicating valve 2. And after gas taking is finished, the oil separator 3 is taken down, the spring in the check valve 10 automatically pops out the valve, so that the valve is closed, and the sealing cover 6 is covered.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The transformer gas taking device is characterized by comprising a gas sampler, a communicating valve, an oil separator and a switching joint, wherein the communicating valve is provided with a port respectively connected with the gas sampler and the oil separator, the communicating valve is also provided with a port connected with an external gas source, and the oil separator is connected with the switching joint.

2. The transformer gas taking device according to claim 1, wherein the gas sampler is provided with a cylinder, a piston and a piston rod, the cylinder is provided with an interface connected with the port of the communicating valve, the cylinder is provided with a gas taking pipeline communicated with the interface, the gas taking pipeline is connected with the piston in a sliding manner, and the piston is connected with the piston rod.

3. The transformer gas taking device according to claim 2, wherein the cylinder is provided with a check valve at an interface.

4. The transformer gas taking device according to claim 2, wherein the gas sampling device is further provided with a limiting member in threaded connection with the gas taking pipe.

5. The transformer gas taking device according to claim 3, wherein the communication valve is provided with a port A, a port B and a port C, the port A is provided with a thimble, and the port A is detachably connected with the interface.

6. The transformer gas taking device according to claim 5, wherein the port B is connected with the oil separator, the external gas source is a nitrogen cylinder, and the port C is connected with the nitrogen cylinder.

7. The transformer gas taking device according to claim 6, wherein the oil separator is provided with an oil separation shell and a joint, one end of the oil separation shell is connected with the joint through an oil separation pipeline, the other end of the oil separation shell is detachably connected with the adapter joint, and the joint is detachably connected with the port B.

8. The transformer gas taking device according to claim 7, wherein a metal clip is provided at a joint of the oil separation pipe, the oil separation housing and the joint.

9. The transformer gas taking device according to claim 7, wherein a needle-shaped pipeline connected with the oil separation pipeline is arranged in the oil separation shell, and an oil separation baffle is arranged at the joint of the oil separation shell and the adapter joint.

10. The transformer gas taking device according to claim 7, wherein the adapter connector is provided with a sealing ring engaged with the relief valve port of the transformer.

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