Laboratory centralized gas supply device and analysis test instrument

Abstract

The utility model discloses a laboratory central gas supply device and an analysis test instrument, and the laboratory central gas supply device comprises a gas supply mechanism, a gas distribution mechanism used for carrying out gas path distribution according to the gas purpose required by a gas using end, and a pressure stabilizing mechanism connected between the gas supply mechanism and the gas distribution mechanism and used for controlling the gas pressure, corresponding connecting ports in the gas supply mechanism, the pressure stabilizing mechanism, the gas distribution mechanism and the gas purification mechanism are communicated through gas conveying pipes; the gas purifying mechanism comprises a centrifugal assembly used for conducting primary purification on gas output by the gas supply mechanism and a gas purifying assembly used for conducting secondary purification on gas distributed by the gas distribution mechanism, the centrifugal assembly is arranged at the gas inlet end of the pressure stabilizing mechanism, and the gas purifying assembly is arranged at the gas outlet end of the pressure stabilizing mechanism. According to the device, gas can be continuously and stably supplied to a plurality of gas using ends at the same time, gas purposes can be accurately distributed and purified according to the requirements of the gas using ends, and it is guaranteed that the gas pressure and purity of the gas at the gas using ends meet the requirements.

Description

Technical Field

[0001] This utility model relates to the field of gas supply equipment technology, and in particular, to a centralized gas supply device for laboratories. It also includes an analytical testing instrument incorporating the centralized gas supply device for laboratories. Background Technology

[0002] Modern laboratories contain numerous analytical instruments, which typically require a gas supply system for various purposes such as analysis, power generation, cleaning, and drying. The gas supply system mainly consists of compressed gas cylinders and connected gas pipelines and valves, delivering the gas from the compressed cylinders to the gas-using instruments via the gas pipelines.

[0003] Currently, each gas-using instrument is usually equipped with an independent gas supply system. This one-to-one gas supply method can meet certain usage requirements, but it also has significant drawbacks. Each gas-using instrument requires a separate pipeline for gas supply, which results in high pipeline laying costs, large space occupation, high energy consumption, and high maintenance costs. In addition, the gas supply is controlled only by manual valves, making it impossible to quantify the gas flow rate and accurately control it according to the flow demand of the gas user. This makes the operation complex and poses high safety risks.

[0004] Chinese Patent Publication No. CN220957952U discloses a centralized gas control and management distribution device, including a mounting frame, a main gas supply connection port, an auxiliary gas supply connection port, a main gas outlet pipe, an upper branch gas outlet pipe, a lower branch gas outlet pipe, a ventilation branch pipe, and an auxiliary gas outlet pipe. The main gas outlet pipe is connected to the main gas supply connection port, the ventilation branch pipe is connected to the main gas outlet pipe, the upper and lower branch gas outlet pipes are both connected to the ventilation branch pipe, and the auxiliary gas supply connection port is connected to the auxiliary gas outlet pipe. Each of the main gas outlet pipe, the upper branch gas outlet pipe, the lower branch gas outlet pipe, and the auxiliary gas outlet pipe has a gas outlet connection port at its end. The gas-using equipment connected to the gas outlet connection port at the end of the auxiliary gas outlet pipe is connected to the auxiliary gas supply connection port through a gas return pipe, and a proportional valve is provided on the gas return pipe. One gas supply can be used by multiple devices, and a separate gas supply end for the gas return device can be added. This patent allows for centralized gas supply to multiple devices, resulting in low pipeline laying costs, precise control and quantitative display of gas usage, and ease of operation. However, it cannot automatically open or close the gas supply valve based on start / stop signals from the gas-consuming end. The branch gas lines are constantly pressurized, which can easily lead to gas leaks. Furthermore, the branch gas lines lack pressure relief valves, posing a risk of damage to equipment and pipelines in case of excessive instantaneous gas pressure. Additionally, it cannot purify the gas according to different usage requirements. Moreover, when gas consumption suddenly increases and the gas cylinder's storage capacity is insufficient, the gas supply line generally needs to be disconnected and the cylinder replaced, interrupting the gas supply and affecting the normal experimental process. Utility Model Content

[0005] This invention provides a centralized gas supply device for laboratories to solve the technical problems of existing gas supply equipment that cannot provide a continuous and stable gas supply and cannot purify the gas according to different gas demand at the gas-consuming end.

[0006] According to one aspect of the present invention, a centralized gas supply device for laboratories is provided, comprising a gas supply mechanism, a gas distribution mechanism for distributing gas according to the gas usage required by the gas user, a pressure stabilizing mechanism connected between the gas supply mechanism and the gas distribution mechanism for controlling gas pressure, and a gas purification mechanism for purifying the gas. The corresponding connection ports of the gas supply mechanism, the pressure stabilizing mechanism, the gas distribution mechanism, and the gas purification mechanism are all connected through gas transmission pipes. The gas purification mechanism includes a centrifugal component for primary purification of the gas output from the gas supply mechanism and a gas purification component for secondary purification of the gas distributed by the gas distribution mechanism. The centrifugal component is located at the inlet end of the pressure stabilizing mechanism, and the gas purification component is located at the outlet end of the pressure stabilizing mechanism.

[0007] Furthermore, the pressure stabilizing mechanism includes two pressure stabilizing tanks and a pressure stabilizing control unit for controlling the gas pressure output from the pressure stabilizing tanks. The inlet ends of the two pressure stabilizing tanks are connected to the gas supply mechanism via gas transmission pipes, and the outlet ends of the two pressure stabilizing tanks are connected to the gas distribution mechanism via gas transmission pipes.

[0008] The pressure stabilizing control unit includes a pressure sensor installed on the pressure stabilizing tank, an inlet valve connected to the inlet end of the pressure stabilizing tank, an outlet valve connected to the outlet end of the pressure stabilizing tank, and a pressure stabilizing controller for controlling the opening and closing of the inlet valve and the outlet valve. The pressure sensor is electrically connected to the pressure stabilizing controller.

[0009] Furthermore, the gas distribution mechanism includes a first-stage distribution valve island for distributing gas according to the application requirements, a second-stage distribution valve island for distributing gas of the same application according to the quantity requirements of the gas-consuming end, and a gas distribution controller for controlling the opening and closing of the first-stage distribution valve island and the second-stage distribution valve island. The first-stage distribution valve island and the second-stage distribution valve island are used to connect to the gas-consuming end through a gas transmission pipe.

[0010] The gas distribution controller is used for electrical connection to the gas consumption end.

[0011] Furthermore, the first-stage distribution valve island includes a first gas distribution valve for controlling the delivery of analytical gas, a second gas distribution valve for controlling the delivery of power gas, and a third gas distribution valve for controlling the delivery of clean gas, with the first, second, and third gas distribution valves connected in parallel.

[0012] Furthermore, the second-stage distribution valve island includes a first air supply valve for installation between the first air distribution valve and the air supply end, a second air supply valve for installation between the second air distribution valve and the air supply end, and a third air supply valve for installation between the third air distribution valve and the air supply end.

[0013] The number of the first, second, and third air valves is matched with the number of air-consuming terminals.

[0014] Furthermore, the gas distribution mechanism also includes a flow control valve located between the second-stage distribution valve island and the gas consumption end. The flow control valve is electrically connected to the gas distribution controller and is used to control the gas flow according to the gas flow required by the gas consumption end.

[0015] Furthermore, the gas distribution mechanism also includes a pipeline protection component installed between the flow control valve and the gas consumption end. The pipeline protection component is electrically connected to the gas distribution controller and is used to provide pressure relief protection for the gas in the gas pipeline.

[0016] Furthermore, the centrifugal assembly includes a housing and a centrifuge and a partition installed inside the housing. The partition is located below the centrifuge and divides the inner cavity of the housing into a centrifugal chamber and a liquid collection chamber. The centrifuge is used to centrifuge water and oil in the gas introduced into the centrifugal chamber into the liquid collection chamber.

[0017] The centrifuge chamber is connected to the air inlet and air outlet of the shell. The bottom of the shell is provided with a drain port that is connected to the liquid collection chamber, and a drain valve is installed on the drain port.

[0018] Furthermore, the air purification assembly includes an air purification pipe connected between the first air distribution valve and the first air consumption valve, and a first air purification column and a second air purification column installed in the air purification pipe. An air purification chamber is formed between the outlet end of the first air purification column and the inlet end of the second air purification column and the air purification pipe.

[0019] The air inlet of the first clean air column is connected to the air inlet of the clean air pipe, and the air outlet of the second clean air column is connected to the air outlet of the clean air pipe.

[0020] Furthermore, according to another aspect of this utility model, an analytical testing instrument is also provided, including the aforementioned centralized laboratory gas supply device.

[0021] This utility model has the following beneficial effects:

[0022] This utility model discloses a centralized gas supply device for laboratories. Through its gas distribution mechanism, it not only supplies gas to multiple gas-consuming terminals but also precisely allocates gas according to the needs of each terminal, achieving efficient gas distribution and meeting the diverse requirements of different experimental scenarios. This improves gas utilization and, compared to the existing one-to-one gas supply method, reduces floor space, pipeline laying costs, and energy consumption. The included pressure stabilizing mechanism effectively regulates and maintains stable gas pressure, ensuring that the gas pressure output to the terminals meets experimental requirements. This prevents pressure fluctuations from affecting experimental results and improves accuracy. Furthermore, the pressure stabilizing mechanism effectively prevents insufficient gas supply during sudden increases in gas consumption, avoiding gas supply interruptions that could disrupt the normal operation of experimental equipment. The device employs a gas purification mechanism that uses a centrifugal component to initially purify the gas output from the gas supply mechanism, separating out water and oil. A secondary purification component then purifies the gas distributed by the gas distribution mechanism, adsorbing and drying gases with specific applications to meet the personalized needs of the gas users. This two-stage purification effectively removes impurities and contaminants, ensuring gas purity and dryness to meet high-precision experimental requirements. Therefore, the device can simultaneously and continuously supply gas stably to multiple users, ensuring that the gas pressure and purity meet experimental requirements. It can also precisely allocate gas according to user needs, satisfying diverse needs in different experimental scenarios and achieving centralized management of laboratory gas supply. It can be widely applied in various laboratory environments, especially suitable for scientific research or testing fields with high requirements for gas purity and pressure stability, demonstrating high practicality and promotional value.

[0023] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a laboratory centralized gas supply device according to a preferred embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the electrical control of the voltage stabilizing mechanism according to a preferred embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the electrical control of the gas distribution mechanism according to a preferred embodiment of the present invention;

[0028] Figure 4This is a schematic diagram of the centrifuge assembly according to a preferred embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the air purification component according to a preferred embodiment of the present invention.

[0030] Legend:

[0031] 100. Gas supply mechanism; 200. Gas distribution mechanism; 201. First-stage distribution valve island; 2011. First gas distribution valve; 2012. Second gas distribution valve; 2013. Third gas distribution valve; 202. Second-stage distribution valve island; 2021. First gas consumption valve; 2022. Second gas consumption valve; 2023. Third gas consumption valve; 300. Pressure stabilizing mechanism; 301. Pressure stabilizing tank; 302. Pressure stabilizing control unit; 3021. Pressure sensor; 3022. Inlet valve; 3023. Outlet valve; 3024. 400. Pressure regulator; 401. Gas purification mechanism; 401. Centrifugal assembly; 4011. Housing; 4012. Centrifuge; 4013. Partition; 4014. Centrifuge chamber; 4015. Liquid collection chamber; 4016. Drain valve; 402. Gas purification assembly; 4021. Gas purification pipe; 4022. First gas purification column; 4023. Second gas purification column; 4024. Gas purification chamber; 500. Gas delivery pipe; 600. Gas consumption end; 700. Gas distribution controller; 800. Flow control valve; 900. Pipeline protection components. Detailed Implementation

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0033] like Figure 1 As shown, the centralized gas supply device for laboratories in this embodiment includes a gas supply mechanism 100, a gas distribution mechanism 200, a pressure stabilizing mechanism 300, and a gas purification mechanism 400. The corresponding connection ports of the gas supply mechanism 100, pressure stabilizing mechanism 300, gas distribution mechanism 200, and gas purification mechanism 400 are all connected via gas pipelines 500. The gas supply mechanism 100 provides a gas source. Preferably, the gas supply mechanism 100 uses an air compressor to ensure uninterrupted gas supply to the gas-consuming end 600. The gas distribution mechanism 200 is connected to the gas-consuming end 600 and is used to distribute gas according to the gas usage required by the gas-consuming end 600. This allows the gas supply mechanism 100 to supply gas to multiple gas-consuming ends 600, and it can accurately allocate gas usage according to the needs of the gas-consuming ends 600, achieving efficient gas distribution, meeting the diverse needs of different experimental scenarios, and improving gas utilization. Compared with the one-to-one gas supply method in the prior art, it can reduce the floor space, lower pipeline laying costs, and reduce energy consumption.

[0034] The pressure stabilizing mechanism 300 is connected between the gas supply mechanism 100 and the gas distribution mechanism 200 and is used to control the gas pressure. The pressure stabilizing mechanism 300 can effectively regulate and maintain the gas pressure stability, ensuring that the gas pressure output to the gas consumption end 600 meets the experimental requirements, avoiding gas pressure fluctuations from affecting the experimental results, and improving the accuracy of the experiment. At the same time, the pressure stabilizing mechanism 300 can also effectively prevent insufficient gas supply when the gas consumption at the gas consumption end 600 suddenly increases, and avoid gas supply interruption from affecting the normal use of the test equipment.

[0035] The gas purification mechanism 400 includes a centrifugal component 401 and a gas purification component 402. The centrifugal component 401 is located between the gas supply mechanism 100 and the pressure stabilizing mechanism 300, and is connected to the outlet of the gas supply mechanism 100 and the inlet of the pressure stabilizing mechanism 300 via a gas delivery pipe 500, for the initial purification of the gas output from the gas supply mechanism 100. The gas purification component 402 is located on the gas distribution mechanism 200 between the pressure stabilizing mechanism 300 and the gas consumption end 600, and is connected to the outlet of the pressure stabilizing mechanism 300 and the gas consumption end 600 via a gas delivery pipe 500, for the secondary purification of the gas distributed by the gas distribution mechanism 200. Thus, the gas purification mechanism 400 performs initial purification of the gas output from the gas supply mechanism 100 through the centrifugal component 401 to separate water and oil from the gas. The gas purification component 402 performs secondary purification of the gas distributed by the gas distribution mechanism 200 to adsorb and dry the gas with specific uses, so as to meet the personalized needs of the gas user 600. Through two-stage purification, impurities and pollutants in the gas can be effectively removed, ensuring the purity and dryness of the gas and meeting the requirements of high-precision experiments.

[0036] like Figure 1 and Figure 2As shown, the pressure stabilizing mechanism 300 includes two pressure stabilizing tanks 301 and a pressure stabilizing control unit 302 for controlling the gas pressure output by the pressure stabilizing tanks 301. The inlet ends of the two pressure stabilizing tanks 301 are connected to the gas supply mechanism 100 through the gas transmission pipe 500, and the outlet ends of the two pressure stabilizing tanks 301 are connected to the gas distribution mechanism 200 through the gas transmission pipe 500. The pressure stabilizing control unit 302 includes a pressure sensor 3021, an inlet valve 3022, an outlet valve 3023, and a pressure stabilizing controller 3024. The pressure sensor 3021 is installed on the pressure stabilizing tank 301. The inlet valve 3022 is installed on the gas supply pipe 500 at the inlet end of the pressure stabilizing tank 301. The outlet valve 3023 is installed on the gas supply pipe 500 at the outlet end of the pressure stabilizing tank 301. The pressure stabilizing controller 3024 is electrically connected to the pressure sensor 3021, the inlet valve 3022, and the outlet valve 3023 to monitor the gas pressure inside the pressure stabilizing tank 301 and control the opening and closing of the inlet valve 3022 and the outlet valve 3023 based on the monitoring data to ensure the stability of the gas pressure output from the pressure stabilizing tank 301. Preferably, the pressure stabilizing tank 301 is also equipped with a safety valve, a pressure gauge, and a drain valve. The safety valve provides overpressure protection for the pressure stabilizing tank 301, preventing the pressure inside the tank from exceeding the design limit and ensuring safety. The pressure gauge displays the pressure inside the pressure stabilizing tank 301 in real time. The pressure gauge and the safety valve are electrically connected to the pressure stabilizing controller 3024. When the data displayed by the pressure gauge exceeds the preset value of the pressure stabilizing tank 301, the safety valve is opened through the pressure stabilizing controller 3024. The drain valve is located at the bottom of the pressure stabilizing tank 301 to drain condensate.

[0037] Specifically, the inlet of the pressure stabilizing tank 301 is connected to the gas supply mechanism 100, allowing it to receive gas from the gas supply mechanism 100 and compress and store a certain volume of gas inside the pressure stabilizing tank 301. A pressure sensor 3021 detects the gas pressure inside the pressure stabilizing tank 301 and uploads the detection data to the pressure stabilizing controller 3024. Thus, gas from the gas supply mechanism 100 fills both pressure stabilizing tanks 301, ensuring that the gas in both tanks reaches a preset pressure and is compressed and stored. Then, the outlet valve 3023 and inlet valve 3022 of one pressure stabilizing tank 301 are closed, allowing that tank to be used as a backup pressure stabilizing tank 301, while the other is used as the main pressure stabilizing tank 301. In operation, when the pressure sensor 3021 detects that the air pressure in the main pressure stabilizing tank 301 has decreased to the set value, the pressure stabilizing controller 3024 controls the outlet valve 3023 of the main pressure stabilizing tank 301 to close, stopping the air supply to the air consumption end 600. Simultaneously, the pressure stabilizing controller 3024 controls the inlet valve 3022 of the main pressure stabilizing tank 301 to open, allowing the air supply mechanism 100 to pressurize it. Once the set pressure value is reached in the main pressure stabilizing tank 301, the inlet valve 3022 closes. At the same time, the pressure stabilizing controller 3024 controls the outlet valve 3023 of the standby pressure stabilizing tank 301 to open, delivering gas with the required pressure to the air consumption end 600. Thus, through the alternating operation of the two pressure stabilizing tanks 301, the air consumption at the air consumption end 600 is maintained stably, effectively preventing sudden increases in air consumption that could lead to insufficient air supply and thus avoiding disruption to the normal operation of the air consumption end 600.

[0038] like Figure 1 and Figure 3As shown, the gas distribution mechanism 200 includes a first-stage distribution valve island 201, a second-stage distribution valve island 202, and a gas distribution controller 700. The first-stage distribution valve island 201 is located between the pressure stabilizing mechanism 300 and the second-stage distribution valve island 202, and is connected to both the pressure stabilizing mechanism 300 and the second-stage distribution valve island 202 via gas delivery pipes 500. It is used to distribute the gas delivered by the pressure stabilizing mechanism 300 according to the application requirements. Preferably, in this embodiment, the gas is divided into three categories according to its application: analytical gas, cleaning gas, and power gas. The second-stage distribution valve island 202 is connected to the gas-consuming end 600 via gas delivery pipes 500, and is used to distribute the gas of the same application according to the quantity requirements of the gas-consuming end 600. Preferably, in this embodiment, each type of gas corresponds to two gas-consuming ends 600. The gas distribution controller 700 is electrically connected to the first-stage distribution valve island 201, the second-stage distribution valve island 202, and the gas-consuming end 600. It can control the opening and closing of the first-stage distribution valve island 201 and the second-stage distribution valve island 202 according to the gas consumption demand of the gas-consuming end 600. Thus, each gas-consuming pipeline can be individually adjusted through the gas distribution controller 700 to meet the personalized needs of different gas-consuming ends 600. When the gas distribution controller 700 detects that one or more gas-consuming terminals 600 are open, the gas distribution controller 700 can control the first-stage distribution valve island 201 and the second-stage distribution valve island 202 to open the gas-consuming pipeline corresponding to each gas-consuming terminal 600, thereby achieving precise gas supply to the gas-consuming terminal 600. Similarly, when the gas distribution controller 700 detects that one or more gas-consuming terminals 600 are closed, the gas distribution controller 700 can control the first-stage distribution valve island 201 and the second-stage distribution valve island 202 to close the gas-consuming pipeline corresponding to each gas-consuming terminal 600, thereby preventing gas leakage and improving safety.

[0039] like Figure 1 and Figure 3 As shown, the first-stage distribution valve island 201 includes a first gas distribution valve 2011 for controlling the delivery of analytical gas, a second gas distribution valve 2012 for controlling the delivery of power gas, and a third gas distribution valve 2013 for controlling the delivery of clean gas. The first gas distribution valve 2011, the second gas distribution valve 2012, and the third gas distribution valve 2013 are respectively installed on three gas delivery pipes 500. The three gas delivery pipes 500 are connected in parallel and communicate with the pressure stabilizing mechanism 300. Thus, the gas delivered from the pressure stabilizing mechanism 300 can be divided into three types of gas delivery lines—analytical gas, power gas, and clean gas—through the first-stage distribution valve island 201. This allows for precise gas supply to multiple gas delivery terminals 600 according to their different gas requirements, effectively improving gas supply efficiency and experimental accuracy. In this embodiment, each of the three types of gas delivery lines (analytical gas, power gas, and clean gas) has two gas delivery terminals 600.

[0040] like Figure 1 and Figure 3As shown, the second-stage distribution valve island 202 includes a first gas supply valve 2021 installed on the gas supply pipe 500 between the first gas distribution valve 2011 and the gas supply end 600, a second gas supply valve 2022 installed on the gas supply pipe 500 between the second gas distribution valve 2012 and the gas supply end 600, and a third gas supply valve 2023 installed on the gas supply pipe 500 between the third gas distribution valve 2013 and the gas supply end 600. The number of the first gas supply valve 2021, the second gas supply valve 2022, and the third gas supply valve 2023 are all adapted to the number of gas supply ends 600, so as to perform secondary distribution of gases for different purposes. Therefore, the first gas supply valve 2021 and the first gas distribution valve 2011 are connected to the same gas supply pipe 500 to form an analytical gas pipeline; the second gas supply valve 2022 and the second gas distribution valve 2012 are connected to the same gas supply pipe 500 to form a power gas pipeline; and the third gas supply valve 2023 and the third gas distribution valve 2013 are both connected to the same gas supply pipe 500 to form a clean gas pipeline. In this embodiment, the number of the first gas supply valve 2021, the second gas supply valve 2022, and the third gas supply valve 2023 corresponds to the number of each gas supply terminal 600, which is set to two.

[0041] like Figure 1 and Figure 3 As shown, the gas distribution mechanism 200 also includes a flow control valve 800 located between the second-stage distribution valve island 202 and the gas consumption end 600. The flow control valve 800 is electrically connected to the gas distribution controller 700 and is used to control the gas flow according to the gas flow required by the gas consumption end 600, so that the output gas flow meets the requirements of the gas consumption end 600, achieving efficient and accurate gas supply with a high degree of automation.

[0042] like Figure 1 As shown, the gas distribution mechanism 200 also includes a pipeline protection component 900 located between the flow control valve 800 and the gas consumption end 600. The pipeline protection component 900 is electrically connected to the gas distribution controller 700 and is used to depressurize the gas in the gas supply pipe 500. Preferably, the pipeline protection component 900 is a pressure relief valve. The pressure range that the pressure relief valve can withstand corresponds to the pressure range required by the gas consumption end 600. It can automatically depressurize when the instantaneous gas supply pressure is too high to protect the pipeline and the gas consumption end 600, thereby improving the safety and service life of the device.

[0043] like Figure 1 and Figure 4As shown, the centrifugal assembly 401 includes a housing 4011 and a centrifuge 4012 and a partition 4013 installed inside the housing 4011. The partition 4013 is located below the centrifuge 4012 and divides the inner cavity of the housing 4011 into a centrifugal chamber 4014 and a liquid collection chamber 4015. The centrifuge 4012 is used to centrifuge water and oil in the gas introduced into the centrifugal chamber 4014 into the liquid collection chamber 4015. The centrifugal chamber 4014 is connected to the air inlet and air outlet of the housing 4011. A drain port communicating with the liquid collection chamber 4015 is opened at the bottom of the housing 4011, and a drain valve 4016 is installed on the drain port. Specifically, the gas output from the gas supply mechanism 100 enters the centrifugal chamber 4014 through the inlet end of the housing 4011. The centrifuge 4012 rotates, generating centrifugal force, which throws oil and water droplets against the inner wall of the housing 4011, removing impurities and achieving initial purification. The purified gas is then output through the outlet end of the housing 4011 to the next pipeline for gas supply, effectively improving gas purity. Water and oil residue on the inner wall of the housing 4011 fall under gravity and are collected in the liquid collection chamber 4015 through openings in the partition 4013. When the liquid in the liquid collection chamber 4015 reaches a certain volume, the drain valve 4016 is opened, allowing the liquid to drain from the drain port at the bottom of the housing 4011.

[0044] like Figure 1 and Figure 5 As shown, the gas purification assembly 402 is installed on the gas supply pipe 500 between the first gas distribution valve 2011 and the first gas consumption valve 2021 to perform secondary purification on the analytical gas. The gas purification assembly 402 includes a purified gas pipe 4021 connected to the gas supply pipe 500 between the first gas distribution valve 2011 and the first gas consumption valve 2021, and a first purified gas column 4022 and a second purified gas column 4023 installed in the purified gas pipe 4021. The inlet ends of the first purified gas column 4022 and the outlet end of the second purified gas column 4023 are connected to the purified gas pipe 4021 to form a purified gas chamber 4024. The inlet end of the first purified gas column 4022 is connected to the inlet end of the purified gas pipe 4021, and the outlet end of the second purified gas column 4023 is connected to the outlet end of the purified gas pipe 4021. Preferably, in this embodiment, the first air purification column 4022 uses degreased cotton to adsorb grease, dust, condensed water mist, etc. in the gas. The second air purification column 4023 includes two layers of degreased cotton and a color-changing desiccant layer disposed between the two layers of degreased cotton. The color-changing desiccant layer can absorb the remaining moisture in the gas and indicate whether the dryness of the gas meets the requirements of the gas-using end 600 by changing the color. Thus, the gas can be filtered and dried in two stages by the first air purification column 4022 and the second air purification column 4023, ensuring that dry and clean gas is output from the second air purification column 4023.

[0045] In use, the gas output from the pressure stabilizing tank 301 enters the first-stage distribution valve island 201 and is distributed according to its intended use. The gas supply pipe 500 with the first gas distribution valve 2011 forms the analytical gas pipeline, the gas supply pipe 500 with the second gas distribution valve 2012 forms the power gas pipeline, and the gas supply pipe 500 with the third gas distribution valve 2013 forms the clean gas pipeline. The analytical gas is output from the first gas distribution valve 2011, filtered and dried by the gas purification component 402, and then enters the first gas consumption valve 2021 and the flow regulating valve before being delivered to the corresponding gas consumption end 600. The power gas and the clean gas pass through the second gas distribution valve 2012 and the third gas distribution valve 2013 corresponding to the first-stage distribution valve island 201, respectively, and then directly enter the second gas consumption valve 2022 and the third gas consumption valve 2023 corresponding to the second-stage distribution valve island 202, and are delivered to the corresponding gas consumption end 600 for use.

[0046] Furthermore, according to another aspect of this utility model, an analytical testing instrument is also provided, including the aforementioned centralized laboratory gas supply device.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laboratory centralized gas supply device, characterized in that, it comprises a gas supply mechanism (100), a gas distribution mechanism (200) for distributing gas according to the gas use requirements of the gas use end (600), a pressure stabilizing mechanism (300) connected between the gas supply mechanism (100) and the gas distribution mechanism (200) and used for controlling the gas pressure, and a gas purification mechanism (400) used for purifying the gas, and the corresponding connection ports of the gas supply mechanism (100), the pressure stabilizing mechanism (300), the gas distribution mechanism (200) and the gas purification mechanism (400) are communicated through the gas conveying pipe (500); the gas purification mechanism (400) comprises a centrifugal component (401) used for primary purification of the gas output by the gas supply mechanism (100) and a gas purification component (402) used for secondary purification of the gas distributed by the gas distribution mechanism (200), and the centrifugal component (401) is arranged at the gas inlet end of the pressure stabilizing mechanism (300), and the gas purification component (402) is arranged at the gas outlet end of the pressure stabilizing mechanism (300).

2. The laboratory centralized gas supply device according to claim 1, characterized in that, the pressure stabilizing mechanism (300) comprises two pressure stabilizing tanks (301) and a pressure stabilizing control unit (302) used for controlling the gas pressure output by the pressure stabilizing tanks (301), the gas inlet ends of the two pressure stabilizing tanks (301) are connected through the gas conveying pipe (500) and communicated with the gas supply mechanism (100), and the gas outlet ends of the two pressure stabilizing tanks (301) are connected through the gas conveying pipe (500) and communicated with the gas distribution mechanism (200); the pressure stabilizing control unit (302) comprises a pressure sensor (3021) installed on the pressure stabilizing tank (301), an inlet valve (3022) connected to the gas inlet end of the pressure stabilizing tank (301), an outlet valve (3023) connected to the gas outlet end of the pressure stabilizing tank (301), and a pressure stabilizing controller (3024) used for controlling the opening and closing of the inlet valve (3022) and the outlet valve (3023), and the pressure sensor (3021) is electrically connected with the pressure stabilizing controller (3024).

3. The laboratory centralized gas supply device according to claim 2, characterized in that, the gas distribution mechanism (200) comprises a first-stage distribution valve island (201) used for distributing gas according to the use requirements, a second-stage distribution valve island (202) used for distributing gas of the same use according to the number requirements of the gas use end (600), and a gas distribution controller (700) used for controlling the opening and closing of the first-stage distribution valve island (201) and the second-stage distribution valve island (202), and the first-stage distribution valve island (201) and the second-stage distribution valve island (202) are used for connecting the gas use end (600) through the gas conveying pipe (500); the gas distribution controller (700) is used for electrically connecting with the gas use end (600).

4. The laboratory centralized gas supply device according to claim 3, characterized in that, The first-stage distribution valve island (201) comprises a first gas distribution valve (2011) for controlling the delivery of analysis gas, a second gas distribution valve (2012) for controlling the delivery of power gas, and a third gas distribution valve (2013) for controlling the delivery of cleaning gas, and the first gas distribution valve (2011), the second gas distribution valve (2012), and the third gas distribution valve (2013) are arranged in parallel.

5. The laboratory centralized gas supply device according to claim 4, wherein, The second-stage distribution valve island (202) comprises a first gas user valve (2021) for being installed between the first gas distribution valve (2011) and the gas user end (600), a second gas user valve (2022) for being installed between the second gas distribution valve (2012) and the gas user end (600), and a third gas user valve (2023) for being installed between the third gas distribution valve (2013) and the gas user end (600); The number of the first gas user valve (2021), the second gas user valve (2022), and the third gas user valve (2023) is adapted to the number of the gas user end (600).

6. The laboratory centralized gas supply device according to claim 3, wherein, The gas distribution mechanism (200) further comprises a flow control valve (800) for being arranged between the second-stage distribution valve island (202) and the gas user end (600), and the flow control valve (800) is electrically connected with the gas distribution controller (700) and is used for controlling the gas flow according to the gas flow demand of the gas user end (600).

7. The laboratory centralized gas supply device according to claim 6, wherein, The gas distribution mechanism (200) further comprises a pipeline protection member (900) for being arranged between the flow control valve (800) and the gas user end (600), and the pipeline protection member (900) is electrically connected with the gas distribution controller (700) and is used for protecting the gas in the gas delivery pipeline (500) from pressure relief.

8. The laboratory centralized gas supply device according to claim 1, wherein, The centrifugal assembly (401) comprises a housing (4011) and a centrifugal separator (4012) and a partition plate (4013) installed in the housing (4011), the partition plate (4013) is arranged below the centrifugal separator (4012) and divides the inner cavity of the housing (4011) into a centrifugal cavity (4014) and a liquid collection cavity (4015), and the centrifugal separator (4012) is used for centrifuging water and oil in the gas entering the centrifugal cavity (4014) into the liquid collection cavity (4015); The centrifugal cavity (4014) is in communication with the gas inlet end and the gas outlet end of the housing (4011), and the bottom of the housing (4011) is provided with a liquid discharge port in communication with the liquid collection cavity (4015), and a liquid discharge valve (4016) is installed on the liquid discharge port.

9. The laboratory centralized gas supply device according to claim 5, wherein, The clean gas assembly (402) comprises a clean gas pipe (4021) connected between the first gas distribution valve (2011) and the first gas utilization valve (2021), and a first clean gas column (4022) and a second clean gas column (4023) installed in the clean gas pipe (4021), and a clean gas cavity (4024) is formed in communication between the outlet end of the first clean gas column (4022) and the inlet end of the second clean gas column (4023) and the clean gas pipe (4021); The inlet end of the first clean gas column (4022) is in communication with the inlet end of the clean gas pipe (4021), and the outlet end of the second clean gas column (4023) is in communication with the outlet end of the clean gas pipe (4021).

10. An analytical test instrument, characterized by A laboratory centralized gas supply device according to any one of claims 1 to 9.

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