A gas cylinder cleaning device

Abstract

The application provides a gas cylinder cleaning device, which comprises an operation box and the following components arranged in the operation box: a vacuum pump; a plurality of branches, one end of each branch being connected with the vacuum pump, the other end of each branch being connected with a standard gas cylinder to be cleaned through an interface, a first electromagnetic valve and a first on-off valve being arranged on each branch; a cleaning gas branch, one end of the cleaning gas branch being connected with cleaning gas, the other end of the cleaning gas branch being connected with the standard gas cylinder, a second electromagnetic valve and a second on-off valve being arranged on the cleaning gas branch; a control panel, which is arranged on the box body of the operation box; the control panel being electrically connected with the vacuum pump, the first electromagnetic valve, the first on-off valve, the second electromagnetic valve and the second on-off valve; after the control panel is operated, the vacuum pump, the first electromagnetic valve and the first on-off valve are controlled to be turned on, vacuumizing the standard gas cylinder, or the second electromagnetic valve and the second on-off valve are controlled to be turned on, filling the standard gas cylinder with cleaning gas. The scheme provided by the application can ensure that the cleanliness of the standard gas cylinder meets the demand of high-precision instrument analysis.

Description

Technical Field

[0001] This application relates to the field of cleaning and maintenance technology for gas analysis instruments, and more specifically, to a gas cylinder cleaning device. Background Technology

[0002] Standard gas cylinders, also known as standard gas cylinders, are pressure vessels used to hold standard gases. In environmental monitoring, such as the calibration of instruments monitoring air pollutants, standard gases from standard gas cylinders are used to calibrate monitoring equipment, ensuring the accuracy and reliability of measurement data and thus obtaining precise ambient air quality data. In gas analysis laboratories, standard gases from standard gas cylinders are used to verify the accuracy and precision of analytical methods, ensuring the reliability of analytical results. Given these applications, the cleanliness of standard gas cylinders is crucial; therefore, cleaning them is a key factor affecting their reliability.

[0003] Current standard gas cylinder cleaning methods typically involve simple vacuuming, which is insufficient to achieve the level of cleanliness required for high-precision instrument analysis applications. Therefore, improvements to the standard gas cylinder cleaning process are necessary. Utility Model Content

[0004] The technical problem to be solved by this application is that the cleaning effect of existing standard gas cylinders is not good, and therefore a gas cylinder cleaning device is provided.

[0005] This application provides a gas cylinder cleaning device, including an operation box and a component disposed within the operation box:

[0006] Vacuum pump;

[0007] Several branches, one end of each branch is connected to the vacuum pump, and the other end of each branch is connected to the standard gas cylinder to be cleaned via an interface. Each branch is equipped with a first solenoid valve and a first switching valve.

[0008] The clean gas branch is connected to the clean gas at one end and to the standard gas cylinder at the other end, and is equipped with a second solenoid valve and a second switch valve.

[0009] The control panel is located on the housing of the operation box; the control panel is electrically connected to the vacuum pump, the first solenoid valve, the first switching valve, the second solenoid valve, and the second switching valve; when the control panel is operated, it controls the vacuum pump, the first solenoid valve, and the first switching valve to open, thereby evacuating the standard gas cylinder, or controls the second solenoid valve and the second switching valve to open, thereby filling the standard gas cylinder with clean gas.

[0010] Preferably, in some embodiments of the gas cylinder cleaning device, the control box has several interfaces, each of which is connected to the other end of a branch.

[0011] Preferably, in some of the gas cylinder cleaning devices described, the diameters of the different interfaces may be the same or different.

[0012] Preferably, in some embodiments of the gas cylinder cleaning device, each of the interfaces is equipped with a quick connector, and the sealing surface of the quick connector is provided with a fluororubber ring or a perfluoroether rubber ring.

[0013] Preferably, in some embodiments of the gas cylinder cleaning device, a vacuum gauge is provided between the vacuum pump and the plurality of branches, and the vacuum gauge monitors the vacuum level of the standard gas cylinder being evacuated.

[0014] Preferably, in some embodiments of the gas cylinder cleaning device, a vacuum solenoid valve for controlling the opening and closing of the vacuum pipeline is further provided between the vacuum pump and the plurality of branches.

[0015] Preferably, in some embodiments of the gas cylinder cleaning device, the cleaning gas branch further includes a vent valve, which is opened after the standard gas cylinder cleaning is completed.

[0016] Preferably, in some embodiments, the gas cylinder cleaning device is connected to the main pipeline after the different branches are connected in parallel with the cleaning gas branch.

[0017] Preferably, the gas cylinder cleaning device described in some embodiments further includes:

[0018] A pressure sensor is installed on the main pipeline.

[0019] Preferably, the gas cylinder cleaning device described in some embodiments further includes:

[0020] A heating assembly is provided on the outside of the standard gas cylinder.

[0021] The technical solution provided in this application has the following technical effects compared with the prior art:

[0022] The gas cylinder cleaning device provided in this application includes several branches for evacuating a standard gas cylinder and a cleaning gas branch for filling the standard gas cylinder with cleaning gas. The evacuation branches are connected to a vacuum pump, and the cleaning gas branches are connected to cleaning gas. Each branch is equipped with a solenoid valve and a switching valve. When evacuation is required, the first solenoid valve and the first switching valve on the evacuation branch are opened; when cleaning gas is required, the second solenoid valve and the second switching valve on the cleaning gas branch are opened. This device allows for repeated evacuation and cleaning gas filling of the standard gas cylinder, ensuring its cleanliness after multiple cycles. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the external structure of a gas cylinder cleaning device according to one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the gas circuit connection relationship of the gas cylinder cleaning device according to one embodiment of this application. Detailed Implementation

[0025] The specific embodiments of this application will be further described below with reference to the accompanying drawings.

[0026] It is readily understood that, based on the technical solution of this application, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of the application.

[0027] This embodiment provides a gas cylinder cleaning device, such as... Figure 1 and Figure 2 As shown, it includes an operation box and a component disposed within the operation box:

[0028] Vacuum pump 100, which can be implemented by existing vacuum pumps on the market, such as oil-free vortex vacuum pump or dry pump, with an ultimate vacuum degree ≤10⁻³ Pa, equipped with a frequency converter, which can adjust the pump speed in real time according to the vacuum degree, with a speed range of 3000~6000 rpm.

[0029] Several branch lines 200 are provided. One end of each branch line 200 is connected to the vacuum pump 100, and the other end of each branch line 200 is connected to the standard gas cylinder to be cleaned via an interface. Each branch line 200 is equipped with a first solenoid valve 201 and a first switching valve 202. The opening degree of the first solenoid valve 201 is adjustable, and the first switching valve 202 is a one-way valve. When it is necessary to evacuate the standard gas cylinder connected to a certain branch line, the first switching valve 202 and the first solenoid valve 201 are opened, and the branch line is in the open state. Figure 2 Taking four branches as an example, interfaces 1 to 4 are used to connect to the standard gas cylinders to be cleaned.

[0030] The clean gas branch 300 connects to the clean gas supply at one end via an interface and to a standard gas cylinder at the other end. It is equipped with a second solenoid valve 301 and a second switching valve 302. In practice, nitrogen is selected as the clean gas. The opening degree of the second solenoid valve 301 is adjustable, and the second switching valve 302 is a one-way valve. When clean gas needs to be added to any standard gas cylinder, the second solenoid valve 301 and the second switching valve 302 are opened. The opening degree of the second solenoid valve 301 can be adjusted according to the number of standard gas cylinders to be filled.

[0031] A control panel 600 is mounted on the housing of the operation box. The control panel 600 is electrically connected to the vacuum pump 100, the first solenoid valve 201, the first switching valve 202, the second solenoid valve 301, and the second switching valve 302. When the control panel 600 is operated, it controls the vacuum pump 100, the first solenoid valve 201, and the first switching valve 202 to open, thereby evacuating the standard gas cylinder, or controls the second solenoid valve 301 and the second switching valve 302 to open, thereby filling the standard gas cylinder with clean gas.

[0032] In practical applications, the above-mentioned device can be used to clean the standard gas cylinders as follows:

[0033] (1) Close all valves and connect the standard gas cylinder to be cleaned to interface Z1 through the connector;

[0034] (2) Operate the buttons on the control panel 600 corresponding to the vacuum pump 100, the first solenoid valve 201 and the first switch valve 202, and the vacuum pump 100 will start to evacuate the standard gas cylinder.

[0035] (3) Operate the button on the control panel 600 corresponding to the vacuum pump 100 to turn off the vacuum pump 100; Operate the button on the control panel 600 corresponding to the second solenoid valve 301 and the second switch valve 302, and the clean gas enters the branch after passing through the clean gas branch 300, and fills the vacuum bottle after passing through the first solenoid valve 201 and the second solenoid valve 202.

[0036] (4) After the clean gas is filled, operate the button on the control panel 600 corresponding to the second solenoid valve 301 and the second switch valve 302 to close the second solenoid valve 301 and the second switch valve 302; then operate the button on the control panel 600 corresponding to the vacuum pump 100 to turn on the vacuum pump 100 and evacuate the gas cylinder.

[0037] (5) Repeat the above cleaning steps multiple times until the set number of times is reached.

[0038] The gas cylinder cleaning device provided in this application includes several branches 200 for evacuating a standard gas cylinder and cleaning gas branches 300 for filling the standard gas cylinder with cleaning gas. The evacuation branches are connected to a vacuum pump 100, and the cleaning gas branches are connected to cleaning gas. Each branch is equipped with a solenoid valve and a switching valve. When evacuation is required, the first solenoid valve 201 and the first switching valve 202 on the evacuation branch are opened; when cleaning gas is required, the second solenoid valve 201 and the second switching valve 202 on the cleaning gas branch are opened. This device allows for repeated evacuation and cleaning gas filling of the standard gas cylinder, ensuring its cleanliness after multiple cycles.

[0039] In the above scheme, the vacuuming time can be preset, for example, each vacuuming operation can be performed for a duration of 30 to 60 seconds. Alternatively, preferably, a vacuum gauge 102 is installed between the vacuum pump 100 and the several branches, and the vacuum gauge 102 monitors the vacuum level of the evacuated standard gas cylinder. The vacuuming operation can be stopped when the required vacuum level is reached; for example, a vacuum level of -0.095 MPa to -0.098 MPa is considered sufficient.

[0040] Similarly, the duration of the cleaning gas filling can be preset, for example, each filling of cleaning gas can last for a duration within the range of 30 to 60 seconds. Alternatively, preferably, the filling of cleaning gas can be considered complete when the pressure value of the branch where the standard gas cylinder is located is detected and the pressure value reaches a value within the range of 0.15 MPa to 0.2 MPa.

[0041] Preferably, as shown in the figure, in the above-mentioned gas cylinder cleaning device, the control box has several interfaces Z1, each of which is connected to the other end of a branch 200. (Combined with...) Figure 1 and Figure 2 Interface Z1 corresponds to Figure 2 Interfaces 1 to 4 are provided. Furthermore, the diameters of the different interfaces may be the same or different. This allows the device to be used to perform cleaning operations on standard gas cylinders of different diameters.

[0042] Furthermore, in the aforementioned gas cylinder cleaning device, each of the interfaces is equipped with a quick connector, and the sealing surface of the quick connector is provided with a fluororubber ring or a perfluoroether rubber ring. The quick connector can use a compression fitting or threaded sealing structure to cooperate with the interface, effectively reducing gas adsorption and metal ion contamination through the sealing structure, thus meeting high-purity gas standards.

[0043] like Figure 1 and Figure 2 As shown, a vacuum solenoid valve 101 for controlling the opening and closing of the vacuum pipeline is also provided between the vacuum pump 100 and the plurality of branch lines 200. Through the coordinated control of the vacuum solenoid valve 101 and the solenoid valves of each branch line, independent control of different standard gas cylinder cleaning stages can be achieved, supporting the simultaneous cleaning of gas cylinders of different specifications or degrees of contamination.

[0044] More preferably, the cleaning gas branch 300 further includes a vent valve 303. After cleaning, the pressure inside the cylinder can be balanced through the vent valve 303, facilitating the safe disassembly of the standard gas cylinder and preventing backflow of impurities due to internal and external pressure differences.

[0045] like Figure 2As shown, the different branch lines 200 and the cleaning gas branch line 300 are connected in parallel to the main pipeline 400. A pressure sensor 500 is installed on the main pipeline 400. The pressure sensor 500 monitors the pressure value in the main pipeline 400 to ensure that the pressure value in all gas pipelines remains stable during the cleaning process.

[0046] In some designs, the device further includes a heating assembly for placement outside the standard gas cylinder. The heating assembly can be an electric heating tape, which converts electrical energy into heat energy to provide heat tracing and insulation for the standard gas cylinder. The cleaning process can simultaneously heat the cylinder, improving cleaning efficiency.

[0047] In some designs, if the number of gas cylinders to be cleaned is large, the device may also include an auxiliary vacuum pump connected in parallel with the vacuum pump 100. The auxiliary vacuum pump is activated when the number of branches requiring vacuuming exceeds a set number. The auxiliary vacuum pump can be a pump with the same characteristics as the vacuum pump, used to assist the vacuum pump in quickly evacuating multiple standard gas cylinders to be cleaned.

[0048] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0049] The above are merely the principles and preferred embodiments of this application. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this application, and these modifications should also be considered within the scope of protection of this application.

Claims

1. A gas cylinder cleaning device, characterized in that, Includes the control box and the components housed within the control box: Vacuum pump; Several branches, one end of each branch is connected to the vacuum pump, and the other end of each branch is connected to the standard gas cylinder to be cleaned via an interface. Each branch is equipped with a first solenoid valve and a first switching valve. The clean gas branch is connected to the clean gas at one end and to the standard gas cylinder at the other end, and is equipped with a second solenoid valve and a second switch valve. The control panel is located on the housing of the operation box; the control panel is electrically connected to the vacuum pump, the first solenoid valve, the first switching valve, the second solenoid valve, and the second switching valve; when the control panel is operated, it controls the vacuum pump, the first solenoid valve, and the first switching valve to open, thereby evacuating the standard gas cylinder, or controls the second solenoid valve and the second switching valve to open, thereby filling the standard gas cylinder with clean gas.

2. The gas cylinder cleaning device according to claim 1, characterized in that: The control box has several interfaces, each of which is connected to the other end of a branch.

3. The gas cylinder cleaning device according to claim 2, characterized in that: The diameters of the different interfaces may be the same or different.

4. The gas cylinder cleaning device according to claim 3, characterized in that: Each of the aforementioned interfaces is equipped with a quick connector, and the sealing surface of the quick connector is provided with a fluororubber ring or a perfluoroether rubber ring.

5. The gas cylinder cleaning device according to claim 1, characterized in that: A vacuum gauge is installed between the vacuum pump and the several branches, and the vacuum gauge monitors the vacuum level of the standard gas cylinder being evacuated.

6. The gas cylinder cleaning device according to claim 5, characterized in that: A vacuum solenoid valve is also provided between the vacuum pump and the several branch lines to control the opening and closing of the vacuum pipeline.

7. The gas cylinder cleaning device according to claim 1, characterized in that: The clean gas branch also includes a vent valve, which is opened after the standard gas cylinder cleaning is completed.

8. The gas cylinder cleaning device according to any one of claims 1-7, characterized in that: The different branches are connected in parallel with the clean gas branch and then connected to the main pipeline.

9. The gas cylinder cleaning device according to claim 8, characterized in that, Also includes: A pressure sensor is installed on the main pipeline.

10. The gas cylinder cleaning device according to claim 9, characterized in that, Also includes: A heating assembly is provided on the outside of the standard gas cylinder.

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