CN104569227B - Gas injection device and method for insulating oil container - Google Patents

Abstract

The invention provides a gas injection device for an insulating oil container and a gas injection method thereof. The gas injection device includes: a gas source; a syringe, the syringe includes a first syringe and a second syringe, a first pipeline is connected between the first syringe and the gas source, and the first syringe is connected to the insulating oil container There is a second pipeline, a third pipeline is connected between the second syringe and the air source, and a vent pipeline is also connected to the second syringe; the piston assembly, the piston assembly includes the first syringe arranged in the first syringe A piston body and a second piston body set in the second injection cylinder, the first piston body and the second piston body move synchronously; when the first injection cylinder is connected to the air source, the second injection cylinder is connected to the vent pipeline; When the first injection cylinder communicates with the insulating oil container, the second injection cylinder communicates with the gas source. The invention solves the problem in the prior art that testers manually perform gas extraction and gas injection operations, which affects the accuracy of test results.

Description

Gas injection device and gas injection method for insulating oil container

technical field

The invention relates to the field of gas extraction and gas injection for gas chromatography experiments, in particular to a gas injection device for an insulating oil container and a gas injection method thereof.

Background technique

During the degassing operation using the vibration degassing method, the tester needs to take a 5ml glass syringe, flush the syringe with nitrogen for 1 to 2 times, and then use the syringe to accurately extract 5.0ml of nitrogen (that is, the balance gas). Then slowly inject the air in the syringe into another syringe containing the test oil. Because the testers need to frequently perform air extraction operations, the testers puncture the sampling septum of the air intake device very frequently, and the testers need to perform maintenance and inspection frequently, and the sampling septum needs to be replaced frequently to prevent the septum from being damaged. After leaking, the purity of the balance gas decreases, which affects the accuracy of the test. Such a gas extraction method is time-consuming and labor-intensive, and when the test workload of the test personnel is heavy, the septum needs to be replaced more frequently, thereby reducing the work efficiency of the test personnel.

Contents of the invention

The main purpose of the present invention is to provide a gas injection device for an insulating oil container and a gas injection method thereof, so as to solve the problem in the prior art that testers manually perform gas extraction and gas injection operations, which affects the accuracy of test results.

In order to achieve the above object, according to one aspect of the present invention, a gas injection device for an insulating oil container is provided, including: a gas source; a syringe, the syringe includes a first syringe and a second syringe, the first syringe and the gas source A first pipeline is connected between them, a second pipeline is connected between the first syringe and the insulating oil container, a third pipeline is connected between the second syringe and the air source, and a second pipeline is connected to the second syringe. The venting pipeline, wherein, the first syringe is selectively communicated with the gas source or the insulating oil container, and the second syringe is selectively communicated with the gas source or the venting pipeline; the piston assembly includes the first The first piston body in the injection cylinder and the second piston body in the second injection cylinder, the first piston body and the second piston body move synchronously; wherein, when the first injection cylinder communicates with the air source, the second injection cylinder and the second piston body move synchronously; The venting pipeline is connected; when the first injection cylinder is connected with the insulating oil container, the second injection cylinder is connected with the gas source.

Further, the volume of the first syringe is equal to the volume of the second syringe.

Further, the gas injection device further includes: a first three-way valve, the first syringe communicates with the first port of the first three-way valve, the gas source communicates with the second port of the first three-way valve through the first pipeline, The insulating oil container communicates with the third port of the first three-way valve through the second pipeline.

Further, the gas injection device further includes: a second three-way valve, the second syringe communicates with the first port of the second three-way valve, the gas source is connected to the second port of the second three-way valve through a third pipeline, The emptying pipeline communicates with the third port of the second three-way valve.

Further, both the first three-way valve and the second three-way valve are electromagnetic valves.

Further, the outlet of the gas source is connected to a carrier gas pipeline, and the end of the carrier gas pipeline away from the gas source is connected to both the first pipeline and the third pipeline.

Further, the end of the carrier gas pipeline away from the gas source is connected to a three-way joint, and both the first pipeline and the third pipeline are connected to the three-way joint.

Further, a carrier gas cut-off valve for conducting or cutting off the carrier gas pipeline is provided on the carrier gas pipeline.

In order to achieve the above object, according to one aspect of the present invention, a gas injection method for an insulating oil container is provided. Using the aforementioned gas injection device, the gas injection method includes the following steps:

Step S1: connect the first syringe with the air source, and connect the second syringe with the vent pipeline;

Step S2: Turn on the gas source to enable the first injection cylinder to perform the gas extraction operation;

Step S3: connecting the first syringe with the second pipeline, and connecting the second syringe with the carrier gas pipeline;

Step S4: Turn on the air source to make the first injection cylinder perform an air injection operation.

Applying the technical solution of the present invention, the gas injection device includes a first injection cylinder and a second injection cylinder, and the first injection cylinder and the second injection cylinder are driven by a piston assembly, so that the gas extraction operation is performed through the first pipeline to thereby generate The balance gas is extracted from the source, and the gas injection operation is performed through the second pipeline to inject the balance gas into the insulating oil container. Applying the technical scheme of the present invention, the test personnel can realize the automatic operation of extracting and injecting the balance gas during the test, thereby using the automatic gas injection device of the present invention to realize quantitative and rapid gas production and gas injection operations, ensuring The accuracy of the test results is improved, and the work efficiency of the test work is improved.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows a schematic diagram of the connection structure of the initial state of an embodiment of the gas injection device according to the present invention;

Fig. 2 shows the circuit control schematic diagram corresponding to the initial state of the gas injection device;

Fig. 3 shows the schematic diagram of the connection structure during the gas production operation of the gas injection device;

Fig. 4 shows the circuit control schematic diagram corresponding to the gas production operation of the gas injection device;

Fig. 5 shows the schematic diagram of the circuit control when the gas extraction operation of the gas injection device is completed and kept in balance;

Figure 6 shows a schematic diagram of the connection structure of the gas injection device during the gas injection operation;

Figure 7 shows a schematic diagram of the first circuit control corresponding to the gas injection operation;

Fig. 8 shows a second circuit control schematic diagram corresponding to the gas injection operation;

Figure 9 shows a schematic diagram of circuit control after the gas injection operation is completed;

Fig. 10 shows a schematic diagram of circuit control when the gas injection device returns to its original state.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. The first syringe; 20. The second syringe;

11. The first pipeline; 12. The first three-way valve;

21. The third pipeline; 22. The second three-way valve;

30. Piston assembly; 40. Carrier gas pipeline;

50. The second pipeline; 60. The vent pipeline;

100. Power supply; 101. Power control switch;

41. Carrier gas cut-off valve; 200. Gas source;

102. Control the transfer switch.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Fig. 1, the present invention provides a gas injection device for an insulating oil container. The gas injection device includes a gas source 200 , a syringe and a piston assembly 30 . Wherein, the injector includes a first syringe 10 and a second syringe 20, a first pipeline 11 is connected between the first syringe 10 and the gas source 200, and a second pipeline 11 is connected between the first syringe 10 and the insulating oil container. The pipeline 50, the third pipeline 21 is connected between the second syringe 20 and the gas source 200, and the second syringe 20 is also connected with a vent pipeline 60, wherein the first syringe 10 and the gas source 200 or The insulating oil container is selectively communicated, and the second injection cylinder 20 is selectively communicated with the gas source 200 or the venting pipeline 60; the piston assembly 30 includes a first piston body arranged in the first injection cylinder 10 and a second injection cylinder. The second piston body in the cylinder 20, the first piston body and the second piston body move synchronously; wherein, when the first syringe 10 communicates with the air source 200, the second syringe 20 communicates with the vent pipeline 60; the first When the injection cylinder 10 communicates with the insulating oil container, the second injection cylinder 20 communicates with the gas source 200 .

The gas injection device includes a first injection cylinder and a second injection cylinder, and the first injection cylinder and the second injection cylinder are driven by a piston assembly, so that the gas recovery operation is performed through the first pipeline to extract the balance gas from the source, and The balance gas is injected into the insulating oil container through the gas injection operation of the second pipeline. Applying the technical scheme of the present invention, the test personnel can realize the automatic operation of extracting and injecting the balance gas during the test, thereby using the automatic gas injection device of the present invention to realize quantitative and rapid gas production and gas injection operations, ensuring The accuracy of the test results is improved, and the work efficiency of the test work is improved.

In this embodiment, the volume of the first syringe 10 is equal to the volume of the second syringe 20 .

Specifically, the gas injection device further includes: a first three-way valve 12 , the first syringe 10 communicates with the first port of the first three-way valve 12 , the gas source 200 communicates with the first three-way valve 12 through the first pipeline 11 The second port of the insulating oil container communicates with the third port of the first three-way valve 12 through the second pipeline 50 . The gas injection device also includes: a second three-way valve 22, the second syringe 20 communicates with the first port of the second three-way valve 22, and the gas source 200 communicates with the second port of the second three-way valve 22 through the third pipeline connected, the venting pipeline 60 communicates with the third port of the second three-way valve 22 . Preferably, both the first three-way valve 12 and the second three-way valve 22 are solenoid valves.

As shown in Figure 1, the gas injection device is in its initial state. At this time, as shown in FIG. 2 , the control circuit connection state of the first three-way valve 12 and the second three-way valve 22 is shown. The power supply 100 provides electric energy for the entire control circuit. In the initial state, it must be ensured that the power supply control switch 101 is in the disconnected state, the control switch 102 is located at the E position, and the remaining control switches are not required, that is, the first three-way valve 12 on the first pipeline 11 is controlled. The switch can be at position A or position B. Similarly, the switch controlling the second three-way valve 22 on the second pipeline 50 can be at position C or position D.

Specifically, the outlet of the gas source 200 is connected with a carrier gas pipeline 40 , and the end of the carrier gas pipeline 40 away from the gas source 200 is connected with both the first pipeline 11 and the third pipeline 21 . The carrier gas pipeline 40 is provided with a carrier gas cut-off valve 41 for conducting or cutting off the carrier gas pipeline 40 .

As shown in Figure 3, when the steam injection device is performing gas extraction operations, the staff connects the first interface and the second interface of the first three-way valve 12, that is, the staff controls the circuit connection as shown in Figure 4, so that The power control switch 101 is closed, and then the switch controlling the first three-way valve 12 can be in position A, thereby connecting the air source with the first syringe 10, and connecting the first port and the second port of the second three-way valve 22 Communication, that is, the worker puts the switch controlling the second three-way valve 22 at the D position, so as to communicate the second syringe 20 with the venting pipeline 60 . Then, the staff opens the carrier gas cut-off valve 41 on the carrier gas pipeline 40 to perform the gas extraction operation. In the initial state of the piston assembly 30 , the first piston body is located at the injection end of the first syringe 10 , and the second piston body is located at the mouth of the second syringe. When the carrier gas cut-off valve 41 is opened, the first piston body moves from left to right under the gas pressure of the gas source 200 . After the gas extraction is completed, the first piston body is located at the mouth of the first syringe 10 , and the second piston moves to the injection port of the second syringe 20 . After the gas extraction is completed, put the switch controlling the first three-way valve at position B, as shown in Figure 5, keep the power control switch 101 off, keep the switch controlling the second three-way valve at position D, and close the carrier gas shut-off valve 41. In this way, the balance gas nitrogen in the gas source 200 stops injecting into the first syringe 10.

As shown in Fig. 6 and Fig. 7, Fig. 7 shows a schematic diagram of the first circuit connection structure corresponding to the gas injection operation, and the staff performs the gas injection operation on the balance gas. The staff keeps the power control switch 101 closed, the switch controlling the first three-way valve is kept at position B, and the switch controlling the second three-way valve is kept at position D. At this time, the control switch 102 in the circuit is switched to F location. In this way, the first injection cylinder 10 communicates with the insulating oil container, and the second injection cylinder communicates with the gas source 200 . When the carrier gas cut-off valve 41 is opened, the second piston body injects the balance gas in the first syringe 10 into the insulating oil container under the pressure of the balance gas to replace the methane, ethylene, and ethane dissolved in the insulating oil , Acetylene, carbon monoxide, carbon dioxide and hydrogen and other gases, so that these gases can be analyzed by vibration degassing method for chromatographic analysis, and then the latent failure of the equipment can be analyzed.

Similarly, as shown in Fig. 8, Fig. 8 shows a schematic diagram of the second circuit control corresponding to the gas injection operation. During the gas injection, the staff can also make the switch controlling the first three-way valve 12 be in position A , and the other switches are connected in the same way as the first circuit. Such circuit control can also make the first injection cylinder 10 communicate with the insulating oil container, and the gas source 200 communicate with the second injection cylinder 20, so that the staff opens the carrier gas cut-off valve 41 to perform the gas injection operation.

As shown in FIG. 9 , after the gas injection operation is completed, keep the control switch 102 at the F position, and the switch controlling the first three-way valve 12 may be at the A position, and the switch controlling the second three-way valve 22 may be at the D position. In this way, the worker closes the carrier gas cut-off valve 41, thereby stopping the gas injection operation.

As shown in Figure 10, keep the power supply control switch 101 closed, and the control changeover switch 102 is in the E position, the switch for controlling the first three-way valve 12 is in the A position, and the switch for controlling the second three-way valve 22 is in the C position, thus , as long as the staff will control the switch of the second three-way valve 22 in the D position again, it will become a circuit control structure for air intake operation.

In this embodiment, the end of the carrier gas pipeline 40 away from the gas source 200 is connected to a three-way joint, and both the first pipeline 11 and the third pipeline 21 are connected to the three-way joint.

According to another aspect of the present invention, the present invention provides a gas injection method for an insulating oil container, using the above gas injection device, and the gas injection method includes the following steps:

Step S1: Connect the first syringe 10 to the air source 200, and connect the second syringe 20 to the venting pipeline 60;

Step S2: Turn on the gas source 200 to enable the first syringe 10 to perform the gas collection operation;

Step S3: Connecting the first syringe 10 to the second pipeline 50, and connecting the second syringe 20 to the carrier gas pipeline 40;

Step S4: Turn on the air source 200 to make the first syringe 10 perform an air injection operation.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

The gas injection device includes a first injection cylinder and a second injection cylinder, and the first injection cylinder and the second injection cylinder are driven by a piston assembly, so that the gas recovery operation is performed through the first pipeline to extract the balance gas from the source, and The balance gas is injected into the insulating oil container through the gas injection operation of the second pipeline. Applying the technical scheme of the present invention, the test personnel can realize the automatic operation of extracting and injecting the balance gas during the test, thereby using the automatic gas injection device of the present invention to realize quantitative and rapid gas production and gas injection operations, ensuring The accuracy of the test results is improved, and the work efficiency of the test work is improved.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. a kind of gas injection device of insulation oil vessel is it is characterised in that include:

Source of the gas (200)；

Syringe, described syringe includes the first injection tube (10) and the second injection tube (20), described first injection tube (10) with It is connected with the first pipeline (11) between described source of the gas (200), be connected between described first injection tube (10) and insulation oil vessel Second pipeline (50), is connected with the 3rd pipeline (21) between described second injection tube (20) and described source of the gas (200), and described second Blowdown piping (60) is also associated with injection tube (20), wherein, the first injection tube (10) optionally with described source of the gas (200) with And described insulation one of oil vessel connection, described second injection tube (20) optionally with described source of the gas (200) and institute State the connection of one of blowdown piping (60)；

Piston component (30), the first piston body that described piston component (30) includes being arranged in described first injection tube (10) with And second piston body, described first piston body and described second piston body synchronization fortune in described second injection tube (20) are set Dynamic；

Wherein, when described first injection tube (10) is connected with described source of the gas (200), described second injection tube (20) and described emptying Pipeline (60) connects；When described first injection tube (10) and described insulating oil reservoir, described second injection tube (20) and institute State source of the gas (200) connection；The volume of described first injection tube (10) is equal with the volume of described second injection tube (20).

2. gas injection device according to claim 1 is it is characterised in that described gas injection device also includes: the first triple valve (12), described first injection tube (10) is connected with the first interface of described first triple valve (12), and described source of the gas (200) passes through institute The second interface stating the first pipeline (11) with described first triple valve (12) connects, and described insulation oil vessel is by described second pipe Road (50) and the 3rd orifice of described first triple valve (12).

3. gas injection device according to claim 2 is it is characterised in that described gas injection device also includes: the second triple valve (22), described second injection tube (20) is connected with the first interface of described second triple valve (22), and described source of the gas (200) passes through the Three pipelines are connected with the second interface of described second triple valve (22), described blowdown piping (60) and described second triple valve (22) The 3rd orifice.

4. gas injection device according to claim 3 is it is characterised in that described first triple valve (12) and described second threeway Valve (22) is magnetic valve.

5. gas injection device according to claim 1 is it is characterised in that the outlet of described source of the gas (200) is connected with carrier gas pipe Road (40), one end away from described source of the gas (200) of described gas-carrier pipeline (40) and described first pipeline (11) and the described 3rd Pipeline (21) is all connected with.

6. gas injection device according to claim 5 it is characterised in that described gas-carrier pipeline (40) away from described source of the gas (200) one end is connected with three-way connection, and described first pipeline (11) and described 3rd pipeline (21) all connect with described three Head connection.

7. gas injection device according to claim 5 is it is characterised in that be provided with for turning in described gas-carrier pipeline (40) Or cut off the carrier gas stop valve (41) of described gas-carrier pipeline (40).

8. a kind of inflating method of insulation oil vessel is it is characterised in that usage right requires the gas injection any one of 1 to 7 Device, described inflating method comprises the following steps:

Step s1: the first injection tube (10) is connected with source of the gas (200), by the second injection tube (20) with blowdown piping (60) even Logical；

Step s2: open source of the gas (200) so that the first injection tube (10) carries out gas production operation；

Step s3: described first injection tube (10) is connected with the second pipeline (50), by the second injection tube (20) and gas-carrier pipeline (40) connect；

Step s4: open described source of the gas (200) so that described first injection tube (10) carries out gas injection operation.