Gas supply system for large precise instrument

Abstract

The utility model relates to a gas supply system for a large precise instrument. The gas supply system comprises a gas cylinder chamber, a gas cylinder, a gas pipeline and a step-by-step pressure reduction device. The device has the advantages that a manager can monitor the temperature, humidity, external air pressure and air leakage of all the gas bottles in real time in a unified mode, and the step-by-step pressure reduction device can prevent the instrument from being damaged by too large airflow impact force.

Description

Technical Field

[0001] This application relates to the field of large precision instruments, and in particular to a gas supply system for large precision instruments. Background Technology

[0002] Laboratory buildings used for scientific research and testing typically house various large and precision instruments, such as Fourier transform infrared spectrometers, atomic absorption spectrometers, liquid chromatography-mass spectrometry systems, and gas chromatography-mass spectrometry systems. Each of these large and precision instruments requires a gas suitable for its specific function to ensure a standardized internal environment and thus high accuracy in the final test results.

[0003] For the reasons mentioned above, the laboratory building housing various large instruments requires a variety of gases for their operation, such as argon, nitrogen, helium, and oxygen. To facilitate gas replacement and switching, many gas cylinders for the large instruments are located in the same room as the instruments. When using the instruments, the gas valves are opened, and when not using the instruments, the gas valves are closed.

[0004] Regarding the aforementioned technologies, the inventors believe that placing gases and instruments in the same room increases the difficulty of unified gas management. In the event of a gas leak or explosion, it could seriously injure users of large, precision instruments and damage the instruments themselves. Utility Model Content

[0005] To facilitate unified gas management and prevent gas leaks and explosions that could damage users and instruments of large precision instruments, this application provides a gas supply system for large precision instruments.

[0006] This application provides a gas supply system for large precision instruments, which adopts the following technical solution:

[0007] A gas supply system for large precision instruments includes a gas cylinder chamber, gas cylinders, gas pipelines, and a step-down pressure reduction device.

[0008] By adopting the above technical solution, all gas cylinders in the laboratory are placed in the gas cylinder room, which is conducive to the manager's unified real-time monitoring of the temperature, humidity, external air pressure, and whether there is any leakage in all gas cylinders; the gas pipeline is used to pass the gas from each gas cylinder in the gas cylinder room into the required instruments; the step-down pressure device makes it easy for the gas to be passed into large precision instruments at the pressure required by the large precision instruments, which can avoid damage to the instruments due to excessive airflow impact force.

[0009] Optionally, the outlet of the gas cylinder is fixedly connected to a main gas valve, and the main gas valve is connected to a main gas meter.

[0010] By adopting the above technical solution, the main gas valve is set up to facilitate the manager's control over the opening and closing of the entire gas cylinder. The main gas gauge can display the flow rate of the gas cylinder into the pipeline in real time, making it easy for the manager to observe the degree of opening of the main gas valve and whether there is gas in the gas cylinder.

[0011] Optionally, the gas pipeline includes a main pipe and multiple branch pipes. One end of the main pipe is fixedly connected to a total gas reading meter, and the other end is fixedly connected to one end of a branch pipe. The end of the branch pipe opposite to the main pipe is connected to a step-down pressure reducing device.

[0012] By adopting the above technical solution, the main pipe is used to export the gas from the gas cylinder, and the branch pipes are used to divert the gas in the main pipe to different large precision instruments that require this gas.

[0013] Optionally, the step-down pressure reduction device includes a first-stage pressure reduction component, a second-stage pressure reduction component, and a third-stage glass rotor flow meter. The first-stage pressure reduction component is connected to the branch pipe and the second-stage pressure reduction component, and the second-stage pressure reduction component is also connected to the third-stage glass rotor flow meter.

[0014] By adopting the above technical solution, the purpose of setting up a primary pressure-reducing component, a secondary pressure-reducing component, and a tertiary glass rotor flowmeter is to reduce pressure step by step. When the instrument requires a large airflow and pressure, the gas flow and pressure are controlled by only the primary pressure-reducing component. When the instrument requires a very small airflow and pressure, the gas flow and pressure can be reduced step by step by using the primary and secondary pressure-reducing components in combination, or by using the primary and secondary pressure-reducing components in combination with the tertiary glass rotor flowmeter, so that the gas can finally enter the large precision instrument smoothly.

[0015] Optionally, the primary pressure reduction assembly includes a primary air valve switch and a primary air pressure gauge. The primary air valve switch is connected to one end of the branch pipe away from the main pipe. One end of the primary air pressure gauge is connected to the primary air valve switch, and the other end is connected to the secondary pressure reduction assembly.

[0016] By adopting the above technical solution, the primary gas valve switch is used to further regulate the flow rate of gas through the branch pipe, and the primary gas pressure gauge can monitor the flow rate and pressure of the gas flowing out of the primary gas valve switch in real time, which facilitates the user's control of the primary gas valve switch.

[0017] Optionally, the secondary pressure reduction assembly includes an air pressure reducing filter and a secondary glass rotor flow meter. One end of the air pressure reducing filter is connected to the primary pressure gauge, and the other end is connected to the secondary glass rotor flow meter.

[0018] By adopting the above technical solution, the air pressure reducing filter in the secondary pressure reducing component can filter impurities in the gas, making the purity of the gas entering large precision instruments higher, and the secondary glass rotor flow meter can more precisely adjust and observe the gas flow rate and pressure.

[0019] Optionally, the reading of the primary pressure gauge is greater than the reading of the secondary glass rotor flow meter, and the reading of the secondary glass rotor flow meter is greater than the reading of the tertiary glass rotor flow meter.

[0020] By adopting the above technical solution, the gas entering the instrument can be depressurized step by step. When the size of the main gas valve remains unchanged, the gas flow rate in the main pipe and branch pipe can be transmitted smoothly, and the gas flow rate and pressure entering the instrument can also be stabilized.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By placing all gas cylinders in the gas cylinder room, this application allows managers to monitor the temperature, humidity, external air pressure, and leakage of all gas cylinders in real time. Furthermore, the step-down pressure device can prevent damage to the instruments caused by excessive airflow impact.

[0023] 2. This application, by setting up a primary pressure-reducing component, a secondary pressure-reducing component, and a tertiary glass rotor flowmeter, enables the gas flow rate and pressure to be controlled solely by the primary pressure-reducing component when the instrument requires a large airflow and pressure; when the instrument requires a very small airflow and pressure, the gas flow rate and pressure can be gradually reduced by using the primary and secondary pressure-reducing components in combination, or by using the secondary pressure-reducing component and the tertiary glass rotor flowmeter in combination, so that the gas can eventually enter the instrument smoothly.

[0024] 3. In this application, the purpose of having the reading of the first-stage pressure gauge greater than that of the second-stage glass rotor flowmeter, and the reading of the second-stage glass rotor flowmeter greater than that of the third-stage glass rotor flowmeter, is to perform stepwise pressure reduction. When the size of the main gas valve remains unchanged, the gas flow in the main pipe and branch pipes can be transmitted smoothly, and the gas flow and pressure entering the instrument can also be stable. Attached Figure Description

[0025] Figure 1 This is a schematic diagram intended to show the overall structure of this utility model;

[0026] Figure 2 This is a structural diagram designed to show the gas cylinder, the main gas valve, and the main gas reading meter;

[0027] Figure 3 This is a schematic diagram intended to show the structure of a step-down voltage reduction device.

[0028] Explanation of reference numerals in the attached diagram: 1. Gas cylinder chamber; 2. Gas cylinder; 3. Gas pipeline; 31. Main pipe; 32. Branch pipe; 4. Step-by-step pressure reduction device; 41. First-stage pressure reduction assembly; 411. First-stage gas valve switch; 412. First-stage gas pressure gauge; 42. Second-stage pressure reduction assembly; 421. Air pressure reducing filter; 422. Second-stage glass rotor flow meter; 43. Third-stage glass rotor flow meter; 5. Main gas valve; 6. Main gas reading gauge. Detailed Implementation

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] This application discloses a gas supply system for large precision instruments. (Refer to...) Figure 1 A gas supply system for large precision instruments includes a gas cylinder 2, a gas pipeline 3, and a step-down pressure reducing device 4 located in a gas cylinder chamber 1; the gas pipeline 3 connects the gas cylinder 2 and the step-down pressure reducing device 4, and the step-down pressure reducing device 4 connects to various large precision instruments in the laboratory.

[0031] When the operator uses the large precision instrument, he opens the gas cylinder 2 in the gas cylinder chamber 1. The gas in the gas cylinder 2 will enter the large precision instrument along the gas pipeline 3 and the step-by-step pressure reduction device 4. Different large precision instruments are connected to gas cylinders 2 containing different gases for the operator to use.

[0032] Reference Figure 1 and Figure 2 One or more gas cylinders 2 are placed in the gas cylinder chamber 1. In this embodiment, there is one gas cylinder 2. The gas outlet of the gas cylinder 2 is fixedly connected to the main gas valve 5, and the main gas valve 5 is fixedly connected to the main gas reading meter 6.

[0033] Reference Figure 1 and Figure 2 The gas pipeline 3 includes a main pipe 31 and multiple branch pipes 32. One end of the main pipe 31 is fixedly connected to the main gas display 6, and the other end is connected to the branch pipes 32. Each branch pipe 32 is fixedly connected to different large precision instruments.

[0034] Reference Figure 3A step-down pressure reducing device 4 is connected to the branch pipe 32. The step-down pressure reducing device 4 includes a primary pressure reducing component 41, a secondary pressure reducing component 42, and a tertiary glass rotor flowmeter 43. The primary pressure reducing component 41, the secondary pressure reducing component 42, and the tertiary glass rotor flowmeter 43 are connected sequentially. The primary pressure reducing component 41 includes a primary air valve switch 411 and a primary air pressure gauge 412. One end of the primary air valve switch 411 is fixedly connected to the branch pipe 32, and the other end is fixedly connected to the primary air pressure gauge 412. The secondary pressure reducing component 42 includes air... The pressure reducing filter 421 and the secondary glass rotor flow meter 422 are connected as follows: one end of the air pressure reducing filter 421 is fixedly connected to the end of the primary pressure gauge 412 away from the primary air valve switch 411, and the other end is fixedly connected to the secondary glass rotor flow meter 422; the end of the secondary glass rotor flow meter 422 away from the air pressure reducing filter 421 is fixedly connected to the tertiary glass rotor flow meter 43; the end of the tertiary glass rotor flow meter 43 away from the secondary glass rotor flow meter 422 is fixedly connected to a large precision instrument requiring gas. The air pressure reducing filter 421, the secondary glass rotor flow meter 422, and the tertiary glass rotor flow meter 43 are all fixed to another branch pipe 32 by clips.

[0035] After opening the main gas valve 5, the gas in gas cylinder 2 flows out of gas cylinder 2, and the main gas gauge 6 displays the pressure of the gas flowing out of gas cylinder 2. After flowing out of the main gas gauge 6, the gas flows through the main pipe 31 and the branch pipe 32 in sequence to the first-stage gas valve switch 411. After opening the first-stage gas valve switch 411, the gas continues to flow through the first-stage gas valve switch 411 and the first-stage pressure gauge 412. The first-stage pressure gauge 412 displays the pressure of the gas flowing out of the first-stage gas valve switch 411. After opening the second-stage glass rotor flowmeter 422, the gas continues to flow through the air pressure reducing filter 421 and the second-stage glass rotor flowmeter 422. After opening the third-stage glass rotor flowmeter 43, the gas continues to flow into the large precision instrument through the third-stage glass rotor flowmeter 43. When opening the gas valve, it is necessary to pay attention to the fact that the gas pressure flowing through the first-stage gas valve switch 411, the second-stage glass rotor flowmeter 422, and the third-stage glass rotor flowmeter 43 should decrease in sequence.

[0036] The implementation principle of a gas supply system for large precision instruments according to an embodiment of this application is as follows: When the instrument operator uses the large precision instrument, the gas cylinder 2 in the gas cylinder chamber 1 and the main gas valve 5 are opened. The main gas gauge 6 displays the pressure of the gas flowing out of the gas cylinder 2. After the gas flows out of the main gas gauge 6, it passes through the main pipe 31 and the branch pipe 32 in sequence, and flows to the primary gas valve switch 411. After the primary gas valve switch 411 is opened, the gas continues to pass through the primary gas valve switch 411 and the primary gas pressure gauge 412. The primary gas pressure gauge 412 displays the pressure of the primary gas valve. The pressure of the gas flowing out of switch 411; after opening the secondary glass rotor flowmeter 422, the gas continues to flow through the air pressure reducing filter 421 and the secondary glass rotor flowmeter 422. The gas pressure flowing through the secondary glass rotor flowmeter 422 needs to be less than the pressure displayed by the primary pressure gauge 412; after opening the tertiary glass rotor flowmeter 43, the gas continues to flow through the tertiary glass rotor flowmeter 43 into the large precision instrument. The gas pressure flowing through the tertiary glass rotor flowmeter 43 needs to be less than the pressure displayed by the secondary glass rotor flowmeter 422.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A gas supply system for large precision instruments, characterized in that: It includes a gas cylinder chamber (1), a gas cylinder (2), a gas pipeline (3), and a step-down pressure reduction device (4); The outlet of the gas cylinder (2) is fixedly connected to a main gas valve (5), and the main gas valve (5) is connected to a main gas meter (6); The gas pipeline (3) includes a main pipe (31) and multiple branch pipes (32). One end of the main pipe (31) is fixedly connected to the total gas reading meter (6), and the other end is fixedly connected to one end of the branch pipe (32). The branch pipe (32) is connected to the step-down pressure reducing device (4) at the end away from the main pipe (31). The step-by-step pressure reduction device (4) includes a first-stage pressure reduction component (41), a second-stage pressure reduction component (42), and a third-stage glass rotor flow meter (43). The first-stage pressure reduction component (41) is connected to the branch pipe (32) and the second-stage pressure reduction component (42). The second-stage pressure reduction component (42) is also connected to the third-stage glass rotor flow meter (43).

2. The gas supply system for large precision instruments according to claim 1, characterized in that: The first-stage pressure reduction assembly (41) includes a first-stage air valve switch (411) and a first-stage air pressure gauge (412). The first-stage air valve switch (411) is connected to the branch pipe (32) at one end away from the main pipe (31). One end of the first-stage air pressure gauge (412) is connected to the first-stage air valve switch (411), and the other end is connected to the second-stage pressure reduction assembly (42).

3. The gas supply system for large precision instruments according to claim 2, characterized in that: The secondary pressure reduction assembly (42) includes an air pressure reducing filter (421) and a secondary glass rotor flow meter (422). One end of the air pressure reducing filter (421) is connected to the primary pressure gauge (412), and the other end is connected to the secondary glass rotor flow meter (422).

4. A gas supply system for large precision instruments according to claim 3, characterized in that: The reading of the first-stage barometer (412) is greater than the reading of the second-stage glass rotor flowmeter (422), and the reading of the second-stage glass rotor flowmeter (422) is greater than the reading of the third-stage glass rotor flowmeter (43).

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