An automatic gas filling system and adjustment method for electron accelerator waveguide

Abstract

The present invention discloses an automatic gas filling system and adjustment method for an electron accelerator waveguide, and belongs to the technical field of accelerator gas filling devices. The system comprises: the outlets of several gas cylinders are connected to the inlets of a gas cylinder switching pressure regulating valve, the inlet of a gas filling solenoid valve is connected to the outlet of a gas cylinder switching pressure regulating valve, a metering valve is arranged between the outlet of the gas filling solenoid valve and the air inlet of the waveguide, a pressure gauge with electric contacts in front of the metering valve is arranged at the outlet of the gas filling solenoid valve, and the pressure gauge with electric contacts in front of the metering valve is connected in communication with the gas filling solenoid valve. A mechanical pressure switch is arranged at the gas outlet of the waveguide, and the mechanical pressure switch is connected in communication with the gas filling solenoid valve, a conductive contact pressure gauge is used to monitor the pressure value at the gas outlet of the waveguide, and the waveguide conductive contact pressure gauge is connected in communication with the gas filling solenoid valve. The automatic gas filling system for the electron accelerator waveguide can realize the self-gassing of the waveguide by the device, reduce labor costs, and ensure the stable operation of the waveguide.

Description

Technical Field

[0001] The invention relates to the technical field of accelerator gas filling devices, and in particular to an electron accelerator waveguide automatic gas filling system and an adjustment method. Background Art

[0002] At present, the existing electron accelerators are basically manually refueled because they are in an ionizing radiation environment. The electronic components involved in the relevant precision refueling cannot be used normally in this environment. Therefore, each manual refueling process requires the entire system to be temporarily shut down, which is costly and requires a high level of operating skills of the operators. It is also easy to cause misoperation and pose a safety hazard. In addition, there is a possibility of missing the inspection of the gas cylinder pressure during each shutdown inspection, and it is impossible to guarantee the damage caused by the waveguide pressure to the device. Summary of the invention

[0003] In view of the above problems existing in the prior art, an object is to provide an electron accelerator waveguide automatic gas filling system and adjustment method, which can realize the self-gas filling of the waveguide by the device, reduce labor costs, and ensure the stable operation of the waveguide.

[0004] The specific technical solutions are as follows:

[0005] An electron accelerator waveguide automatic gas filling system mainly comprises: a plurality of gas cylinders, a gas cylinder switching pressure regulating valve, a gas filling solenoid valve, a metering valve, an electric contact pressure gauge before the metering valve, a mechanical pressure switch and a waveguide electric contact pressure gauge.

[0006] Several gas cylinders are arranged redundantly with each other.

[0007] The outlets of the plurality of gas cylinders are communicated with the inlets of the plurality of gas cylinder switching pressure regulating valves.

[0008] The inlet of the gas filling solenoid valve is communicated with the outlet of the gas cylinder switching pressure regulating valve.

[0009] The metering valve is arranged between the outlet of the gas filling solenoid valve and the air inlet of the waveguide, and the metering valve controls the air intake flow to be adjusted to a small flow.

[0010] The electric contact pressure gauge before the metering valve is arranged at the outlet of the gas filling solenoid valve for detecting the waveguide pressure, and the electric contact pressure gauge before the metering valve is communicatively connected with the gas filling solenoid valve.

[0011] The mechanical pressure switch is arranged at the air outlet of the waveguide tube. The mechanical pressure switch is set with a preset high value and a preset low value, and the mechanical pressure switch is communicatively connected with the gas filling solenoid valve. When the air pressure value detected by the mechanical pressure switch is lower than the preset low value, the mechanical pressure switch is closed and the gas filling solenoid valve is opened. When the air pressure value detected by the mechanical pressure switch is higher than the preset high value, the mechanical pressure switch is opened and the gas filling solenoid valve is closed.

[0012] The waveguide electrical contact pressure gauge is used to monitor the pressure value at the air outlet of the waveguide tube, and the waveguide electrical contact pressure gauge is communicatively connected with the gas filling solenoid valve.

[0013] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics, and further includes a drying filter, which is arranged between the gas cylinder switching pressure regulating valve and the gas filling solenoid valve, and is used to dry the gas released from the gas cylinder.

[0014] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics, and also includes a post-filter pressure gauge, which is arranged between the dry filter and the gas filling solenoid valve, and is used to detect the pipeline pressure between the dry filter and the gas filling solenoid valve, and compare it with the pipeline pressure between the dry filter and the gas filling solenoid valve.

[0015] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics, and also includes a first safety unloading valve and a second safety unloading valve which are redundant with each other. The first safety unloading valve is arranged at the air outlet of the waveguide tube, and the second safety unloading valve is arranged at the air inlet of the waveguide tube.

[0016] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics, and further comprises a waveguide on-site pressure gauge, and the waveguide on-site pressure gauge is connected to the first safety unloading valve.

[0017] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics: at least two gas cylinders are provided, and the gas cylinders are filled with nitrogen.

[0018] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics: the gas cylinder switching pressure regulating valve, the gas filling solenoid valve, the metering valve, the first safety unloading valve and the second safety unloading valve are all made of metal, and the sealing parts in each valve body are made of fluororubber.

[0019] The above-mentioned electron accelerator waveguide automatic gas filling system also has the following characteristics: the electric contact pressure gauge before the metering valve, the electric contact pressure gauge of the waveguide, the pressure gauge after the filter, and the waveguide on-site pressure gauge are made of metal material.

[0020] A method for adjusting an electron accelerator waveguide automatic gas filling system comprises the following steps:

[0021] S1. When the mechanical pressure switch detects that the air pressure in the waveguide is lower than the preset low value, the gas filling solenoid valve opens to fill the waveguide with gas until the air pressure in the waveguide reaches the preset high value;

[0022] S2, when the mechanical pressure switch detects that the air pressure in the waveguide reaches a preset high value, the gas filling solenoid valve is closed and the mechanical pressure switch is opened;

[0023] S3. If the mechanical pressure switch in S2 fails and the gas filling solenoid valve is still open, the pressure in the waveguide tube continues to rise. When the pressure rises to any set pressure value of the waveguide electric contact pressure gauge and the electric contact pressure gauge before the metering valve, the pressure gauge interlocking solenoid valve is closed;

[0024] S4. If the waveguide electric contact pressure gauge and the electric contact pressure gauge before the metering valve in S3 fail, when the pressure reaches the set pressure value of the first safety unloading valve or the second safety unloading valve, the first safety unloading valve or the second safety unloading valve opens to provide pressure relief protection for the automatic gas filling system until the air pressure in the waveguide tube is lower than the preset high value.

[0025] The positive effects of the above technical solution are:

[0026] The present invention provides an automatic gas filling system for an electron accelerator waveguide, in which a gas cylinder switching pressure regulating valve, a gas filling solenoid valve and a metering valve for adjusting the gas pressure are arranged, which can be used to adjust the amount of gas entering the waveguide, and can accurately control the amount of gas entering the waveguide, thereby realizing automatic gas filling of the waveguide to replace manual gas filling, thereby reducing labor costs; in addition, the gas filling system is also provided with multiple unloading devices, which can unload the waveguide and an external gas filling pipeline in an emergency, and can ensure the safety and normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The system layout diagram of an embodiment of an electron accelerator waveguide automatic gas filling system of the present invention.

[0028] 1. Gas cylinder; 2. Gas cylinder; 3. Gas cylinder switching pressure regulating valve; 4. Dry filter; 5. Pressure gauge after the filter; 6. Gas filling solenoid valve; 7. Electric contact pressure gauge before the metering valve; 8. Metering valve; 9. Mechanical pressure switch; 10. Waveguide electric contact pressure gauge; 11. First safety unloading valve; 12. Waveguide on-site pressure gauge; 13. Second safety unloading valve; 14. Waveguide tube. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1The present invention specifically describes an electron accelerator waveguide automatic gas filling system.

[0030] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] The difficulty of the automatic gas filling system lies in the small single gas filling volume, the complex external environment and the difficulty of using ordinary instruments. The volume of the waveguide 14 in this application is 0.624L, and its normal working pressure is between 0.18-0.2Mpa. When the pressure drops to 0.18Mpa, nitrogen is added, and when it reaches 0.2Mpa, the solenoid valve is closed to stop filling. By calculating through the formula P1V1=P2V2, 0.2*0.624=0.18*V2, V2≈0.693 is obtained, and the single gas filling volume is 0.693-0.624≈0.069L. The air intake flow rate is controlled to 0.069L / Min. Therefore, the gas filling volume is very small and requires multiple steps of flow limiting to achieve. The gas cylinder switches the pressure regulating valve 3, CV=0.02, which is the first flow limiting for nitrogen. The gas filling solenoid valve 6 uses a small flow type to limit the nitrogen for the second time. A metering valve 8 is added at the outlet of the gas filling solenoid valve 6 for the third flow limiting to reach the predetermined flow rate to achieve the predetermined flow rate.

[0033] In the electron accelerator waveguide automatic gas filling system, a plurality of gas cylinders 2 are redundantly arranged with each other, and generally two gas cylinders (1, 2) are arranged in parallel, that is, when the gas source pressure in one gas cylinder 1 drops below the switching pressure, the gas is automatically switched from the exhausted gas source to another replacement gas cylinder 2, thereby ensuring the continuity of the gas flow during the gas filling process.

[0034] The outlets of the plurality of gas cylinders 2 are connected to the inlet of the gas cylinder switching pressure regulating valve 3. The gas cylinder switching pressure regulating valve 3 can complete switching between the plurality of gas cylinders (1, 2), and lower the pressure of the gas coming out of the gas cylinders (1, 2), and at the same time preliminarily filter the gas coming out of the gas cylinders (1, 2). In the present embodiment, the gas cylinder switching pressure regulating valve 3 can reduce the pressure of the 15Mpa high-pressure gas in the gas cylinders (1, 2) to 0.6Mpa. Specifically, the gas cylinder switching pressure regulating valve 3 is provided with a 1.5Mpa unloading valve. When the valve fails or the pressure after the valve is higher than the limit value, the gas is automatically exhausted, thereby protecting the safety of subsequent pipelines and instruments.

[0035] The inlet of the gas filling solenoid valve 6 is connected to the outlet of the gas cylinder switching pressure regulating valve 3. The gas filling solenoid valve 6 is used to control whether the waveguide tube 14 is inflated, and the gas filling solenoid valve 6 is interlocked with the waveguide electric contact pressure gauge 10, the metering valve front electric contact pressure gauge 7, and the mechanical pressure switch 9 to control gas filling.

[0036] The metering valve 8 is arranged between the outlet of the gas filling solenoid valve 6 and the air inlet of the waveguide 14. The metering valve 8 controls the air intake flow rate to a small flow rate. Because the air filling amount required for the waveguide 14 each time is small, it is necessary to control the slow air intake. In addition, it can also ensure the stability of the airflow during the air intake process.

[0037] The electric contact pressure gauge 7 before the metering valve is arranged at the outlet of the gas filling solenoid valve 6, and is used to detect the pressure of the waveguide tube 14, and the electric contact pressure gauge 7 before the metering valve is communicatively connected with the gas filling solenoid valve 6, that is, when the electric contact pressure gauge 7 before the metering valve detects a high pressure contact, the electric contact pressure gauge 7 before the metering valve is connected with the gas filling solenoid valve 6 to be closed, thereby protecting the safety of the entire system.

[0038] The mechanical pressure switch 9 is arranged at the air outlet of the waveguide 14. In the present embodiment, the control hysteresis of the mechanical pressure switch 9 is set to 0.2Mpa, and specifically operates between 0.18-0.2Mpa. The mechanical pressure switch 9 is provided with a preset high value of 0.2Mpa and a preset low value of 0.18Mpa, and the mechanical pressure switch 9 is communicated with the gas filling solenoid valve 6 to control the gas filling of the system together. When the air pressure value detected by the mechanical pressure switch 9 is lower than the preset low value of 0.18Mpa, the mechanical pressure switch 9 is closed, the gas filling solenoid valve 6 is opened, and the gas filling solenoid valve 6 is set to add nitrogen to the waveguide 14. When the air pressure value detected by the mechanical pressure switch 9 is higher than the preset high value of 0.2Mpa, the mechanical pressure switch 9 is opened, and part of the air pressure begins to be unloaded, and the gas filling solenoid valve 6 is closed.

[0039] Generally, a waveguide electric contact pressure gauge 10 and a mechanical pressure switch 9 are arranged in parallel in the pipeline. The waveguide electric contact pressure gauge 10 is used to monitor the pressure value at the air outlet of the waveguide tube 14. That is, when the mechanical pressure switch 9 fails, the waveguide electric contact pressure gauge 10 can be communicated with the gas filling solenoid valve 6, that is, when the waveguide electric contact pressure gauge 10 detects that a high pressure contact is reached in the pipeline, the gas filling solenoid valve 6 is interlocked and closed.

[0040] In a preferred embodiment, Figure 1 As shown, it also includes a drying filter 4, which is arranged between the gas cylinder switching pressure regulating valve 3 and the gas filling solenoid valve 6. The drying filter 4 is used to dry the gas released from the gas cylinders (1, 2), specifically to dry the nitrogen that subsequently enters the waveguide 14, to ensure that the nitrogen is dry and pure, and to avoid excessive humidity of the nitrogen from affecting the operation of the components in the waveguide 14.

[0041] In a preferred embodiment, Figure 1 As shown, it also includes a post-filter pressure gauge 5, which is arranged between the dry filter 4 and the gas filling solenoid valve 6, and is used to detect the pipeline pressure between the dry filter 4 and the gas filling solenoid valve 6, and compare it with the pipeline pressure between the dry filter 4 and the gas filling solenoid valve 6. Under normal circumstances, the air pressure in the pipeline before the inlet of the dry filter 4 is significantly different from the air pressure in the pipeline after the outlet of the dry filter 4. If the air pressure in the pipeline before the inlet of the dry filter 4 is basically the same as the air pressure in the pipeline after the outlet of the dry filter 4, it means that the dry filter 4 has failed, and the staff is reminded to replace the dry filter 4 in time through the pressure gauge after the dry filter 4.

[0042] In a preferred embodiment, Figure 1As shown, it also includes a first safety unloading valve 11 and a second safety unloading valve 13 which are redundant with each other. As long as one of the first safety unloading valve 11 and the second safety unloading valve 13 starts the unloading work, the safety of the entire gas filling system can be guaranteed. The first safety unloading valve 11 is arranged at the air outlet of the waveguide 14, and the second safety unloading valve 13 is arranged at the air inlet of the waveguide 14. When other components in the air intake system pipeline fail and do not work, when the air pressure in the pipeline reaches a preset value, the first safety unloading valve 11 and / or the second safety unloading valve 13 are opened to unload the entire gas filling system.

[0043] In a preferred embodiment, Figure 1 As shown, it also includes a waveguide on-site pressure gauge 12, which is used to observe the current system pressure value in real time. The waveguide on-site pressure gauge 12 is connected to the first safety unloading valve 11. The waveguide on-site pressure gauge 12 feeds back the detected system pressure value to the first safety unloading valve 11, and the first safety unloading valve 11 works in a timely manner.

[0044] In a preferred embodiment, Figure 1 As shown, at least two gas cylinders (1, 2) are provided, and the number of gas cylinders (1, 2) can also be increased according to actual needs, and the gas cylinders (1, 2) are filled with nitrogen.

[0045] In a preferred embodiment, Figure 1 As shown, the gas cylinder switching pressure regulating valve 3, the gas filling solenoid valve 6, the metering valve 8, the first safety unloading valve 11 and the second safety unloading valve 13 are all made of metal. Because the components involved need to be arranged in an ionizing radiation irradiation environment, metal valves can work normally in this complex radiation environment, have a long service life and can ensure the normal operation of the system. In addition, the sealing parts in each valve body are made of fluororubber, which has good sealing performance and can resist the influence of the irradiation environment.

[0046] In a preferred embodiment, Figure 1 As shown, the electric contact pressure gauge 7 before the metering valve, the waveguide electric contact pressure gauge 10, the pressure gauge 5 after the filter, and the waveguide on-site pressure gauge 12 are made of metal materials. Because the components involved in the above need to be arranged in an ionizing radiation irradiation environment, instruments made of metal materials can work normally in this complex radiation environment, the instrument readings are accurate and not affected by radiation, the service life is long and can ensure the normal operation of the system.

[0047] A method for adjusting an electron accelerator waveguide automatic gas filling system comprises the following steps:

[0048] S1. The normal working air pressure in the waveguide is between a preset low value and a preset high value. When the mechanical pressure switch detects that the air pressure in the waveguide is lower than the preset low value, the gas filling solenoid valve opens to fill the waveguide with gas until the air pressure in the waveguide reaches the preset high value.

[0049] S2, when the mechanical pressure switch detects that the air pressure in the waveguide reaches a preset high value, the gas filling solenoid valve closes after receiving the signal from the mechanical pressure switch, and the mechanical pressure switch opens, causing the air pressure in the waveguide to gradually decrease;

[0050] S3. If the mechanical pressure switch in S2 fails, the air pressure in the waveguide reaches the preset high value, and the gas filling solenoid valve is still open, the pressure in the waveguide continues to rise. When the pressure rises to any set pressure value of the waveguide electric contact pressure gauge and the electric contact pressure gauge before the metering valve, the pressure gauge interlocking solenoid valve is closed, thereby preventing the pressure in the waveguide from continuing to rise;

[0051] S4. If the waveguide electric contact pressure gauge and the electric contact pressure gauge before the metering valve in S3 fail, when the pressure reaches the set pressure value of the first safety unloading valve or the second safety unloading valve, the first safety unloading valve or the second safety unloading valve opens to provide pressure relief protection for the automatic gas filling system until the air pressure in the waveguide tube is lower than the preset high value, thereby ensuring the safe operation of the entire system.

[0052] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An electron accelerator waveguide automatic gas filling system, characterized in that: include: A plurality of gas cylinders, wherein the plurality of gas cylinders are redundant with each other; A gas cylinder switching pressure regulating valve, wherein the outlets of a plurality of gas cylinders are connected to the inlets of a plurality of the gas cylinder switching pressure regulating valves; A gas filling solenoid valve, the inlet of which is connected to the outlet of the gas cylinder switching pressure regulating valve; A metering valve, the metering valve is arranged between the outlet of the gas filling solenoid valve and the air inlet of the waveguide, and the metering valve controls the air intake flow to be adjusted to a small flow; A pressure gauge with electric contacts before the metering valve, which is arranged at the outlet of the gas filling solenoid valve and is used to detect the pressure of the waveguide tube, and is communicatively connected with the gas filling solenoid valve; A mechanical pressure switch, the mechanical pressure switch is arranged at the air outlet of the waveguide, the mechanical pressure switch is provided with a preset high value and a preset low value, and the mechanical pressure switch is communicatively connected with the gas filling solenoid valve, when the air pressure value detected by the mechanical pressure switch is lower than the preset low value, the mechanical pressure switch is closed, and the gas filling solenoid valve is opened, when the air pressure value detected by the mechanical pressure switch is higher than the preset high value, the mechanical pressure switch is opened, and the gas filling solenoid valve is closed; A waveguide electrical contact pressure gauge, used to monitor the pressure value at the air outlet of the waveguide tube, the waveguide electrical contact pressure gauge is communicatively connected with the gas filling solenoid valve; It also includes a drying filter, which is arranged between the gas cylinder switching pressure regulating valve and the gas filling solenoid valve, and is used to dry the gas released from the gas cylinder; It also includes a filter post-pressure gauge, which is disposed between the filter drier and the gas filling solenoid valve, and is used to detect the pipeline pressure between the filter drier and the gas filling solenoid valve, and compare it with the pipeline pressure between the filter drier and the gas filling solenoid valve; It also includes a first safety unloading valve and a second safety unloading valve which are redundant with each other, wherein the first safety unloading valve is arranged at the air outlet of the waveguide, and the second safety unloading valve is arranged at the air inlet of the waveguide; It also includes a waveguide on-site pressure gauge, which is connected to the first safety unloading valve; At least two gas cylinders are provided, and the gas cylinders are filled with nitrogen.

2. The electron accelerator waveguide automatic gas filling system according to claim 1, characterized in that: The gas cylinder switching pressure regulating valve, the gas filling solenoid valve, the metering valve, the first safety unloading valve and the second safety unloading valve are all made of metal, and the sealing parts in each valve body are made of fluororubber.

3. The electron accelerator waveguide automatic gas filling system according to claim 1, characterized in that: The electric contact pressure gauge before the metering valve, the electric contact pressure gauge of the waveguide, the pressure gauge after the filter and the waveguide on-site pressure gauge are made of metal.

4. A method for adjusting an electron accelerator waveguide automatic gas filling system, comprising a gas filling system as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1. When the mechanical pressure switch detects that the air pressure in the waveguide is lower than a preset low value, the gas filling solenoid valve is opened to fill the waveguide with gas until the air pressure in the waveguide reaches a preset high value; S2, when the mechanical pressure switch detects that the air pressure in the waveguide reaches a preset high value, the gas filling solenoid valve is closed and the mechanical pressure switch is opened; S3, if the mechanical pressure switch in S2 fails, the gas filling solenoid valve is still open, the pressure in the waveguide tube continues to increase, and when the pressure rises to any set pressure value of the waveguide electric contact pressure gauge and the metering valve front electric contact pressure gauge, the pressure gauge interlocking solenoid valve is closed; S4. If the waveguide electric contact pressure gauge and the metering valve front electric contact pressure gauge in S3 fail, when the pressure reaches the set pressure value of the first safety unloading valve or the second safety unloading valve, the first safety unloading valve or the second safety unloading valve opens to provide pressure relief protection for the automatic gas filling system until the air pressure in the waveguide tube is lower than the preset high value.

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