Gas distribution control system based on volume method
By adopting a volume-based gas distribution control system in the gas distribution system, using components such as cylinders, speed control joints and pneumatic valves, the problems of uneven proportion of mixed gas and inappropriate gas capacity are solved, and uniform gas mixing is achieved and stable ratio.
Patent Information
- Application Number
- CN202421191698.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-29
AI Technical Summary
In the configuration of mixed gases, the existing gas distribution system cannot ensure that the proportion of mixed gases per unit volume is uniform, and the gas injected at one time is likely to cause problems of uneven mixing and inappropriate gas capacity.
The gas distribution control system based on the volume method is adopted, including the gas distribution chamber module, temperature-controlled heating module and pressure transmitter. Through components such as cylinders, speed control joints, pneumatic valves and position sensors, uniform gas mixing and volume control are achieved. .
The uniform mixing of gases within a unit volume is achieved, the stability of gas ratio is ensured, and the problem of excessive or too small gas capacity is avoided, which improves the efficiency and reliability of the gas distribution system.
Smart Images
Figure CN222529670U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas distribution systems, and in particular to a gas distribution control system based on a volumetric method. Background Art
[0002] A mixed gas control system is a system that is specifically used to mix two or more different gases in a certain proportion to achieve specific physical or chemical properties. These systems are usually used in industrial production, laboratory research, health care and other fields to ensure the performance and safety of gas mixtures for specific purposes.
[0003] The core components of the mixed gas control system include flow meters, supply pipelines, buffer tubes, buffer bottles, pressure sensors, gas analyzers and process machines. The working principle of the system is to control the required flow of different gases through flow meters, and inject different gases into the buffer tubes through supply pipelines for mixing. The mixed gas is passed into the gas analyzer, and the gas analyzer is used to monitor the gas concentration ratio in the current mixed gas to ensure that the ratio of the mixed gas meets the preset requirements. When the requirements are met, the mixed gas is passed into the buffer bottle through the supply pipeline for sufficient mixing. After the preset time, the pressure of the mixed gas is adjusted by the pressure regulating valve to meet the preset requirements. The design and implementation of the mixed gas control system need to consider many factors, including but not limited to gas compatibility, mixing ratio, flow control, pressure management, safety and reliability.
[0004] In the prior art, in the process of gas distribution, it is not possible to ensure that the proportion of mixed gas in each unit volume is uniform in the configuration of the mixed gas. The one-time injection of the gas to be configured is likely to cause uneven mixing between molecules inside the gas, and it is also likely to cause uneven mixing inside the mixed gas. Secondly, the one-time gas distribution is likely to cause the volume of the configured gas to be too large and cannot be completely injected into the mixing chamber, or the volume of the configured gas is too small and cannot fill the mixing chamber. Therefore, we have made improvements to this and proposed a gas distribution control system based on the volumetric method. Utility Model Content
[0005] The purpose of the utility model is to address the problem that in the current gas distribution process, it is impossible to ensure that the proportion of mixed gases in each unit volume is uniform in the configuration of the mixed gas. The one-time injection of the gas to be configured is likely to cause uneven mixing between molecules inside the gas, and also likely to cause uneven mixing inside the mixed gas; secondly, the one-time gas distribution is likely to cause the volume of the configured gas to be too large and unable to be completely injected into the mixing chamber, or the volume of the configured gas to be too small and unable to fill the mixing chamber.
[0006] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:
[0007] A valve distribution control system based on the volumetric method is provided to improve the above problems.
[0008] The specific application is as follows:
[0009] A gas distribution control system based on the volumetric method includes a gas distribution cavity group module, a temperature control heating module and a pressure transmitter. The gas distribution cavity group module includes a source gas cavity A, a source gas cavity C and a mixing gas cavity B. The inner ends of the source gas cavity A, the source gas cavity C and the mixing gas cavity B are respectively connected to cylinders, and the inner ends of the cylinders are respectively connected to speed regulating joints. A pneumatic valve A and a pneumatic valve C are respectively arranged between the source gas cavity A, the source gas cavity C and the mixing gas cavity B. The signals of the pneumatic valve A and the pneumatic valve C are respectively connected to the A position sensor and the C position sensor. The outer ends of the source gas cavity A and the source gas cavity C are respectively provided with a pneumatic valve A and a pneumatic valve C. The source gas cavity A, the mixing gas cavity B and the source gas cavity C are respectively connected to the pressure transmitter.
[0010] As a preferred technical solution of the present application, a gas source concentration selection module is provided at the outer end of the source gas cavity A, and the gas source concentration selection module includes a high concentration module and a low concentration module. The high concentration module controls the injection of pure hydrogen into the source gas cavity A, and the low concentration module controls the injection of 1% standard gas into the source gas cavity A.
[0011] As a preferred technical solution of the present application, the gas in the source air cavity C is air, and the air pressure conditions in the source air cavity A and the source air cavity C are monitored by a pressure transmitter.
[0012] As a preferred technical solution of the present application, the cylinder in the mixing chamber B reciprocates to mix the gas.
[0013] As the preferred technical solution of the present application, three groups of heating belts are arranged in the temperature control heating module, and the three groups of heating belts are respectively wrapped around the outer ends of the source gas cavity A, the source gas cavity C and the mixing gas cavity B, and the three groups of heating belts are controlled by the temperature control heating module signal.
[0014] As the preferred technical solution of the present application, the gas distribution cavity group module also includes a pressurized gas filling module and an exhaust module. The pressurized gas filling module is used for the injection of the second round and each subsequent round of source gas. The exhaust module includes an exhaust valve and a vacuum pump. The exhaust module is used for internal cleaning after each round of gas mixing is completed. The exhaust module is used for gas recovery in the source gas cavity A and the source gas cavity C in each round.
[0015] As a preferred technical solution of the present application, an RGA gas analysis module is provided at the outer end of the mixing chamber B, a pneumatic valve is connected between the RGA gas analysis module and the mixing chamber B, and the RGA gas analysis module is used to monitor the gas distribution degree in real time.
[0016] Compared with the prior art, the utility model has the following beneficial effects:
[0017] In the scheme of this application:
[0018] It can judge whether the gas distribution is completed by itself, and can recycle and reuse the excess gas after the gas distribution is completed through the exhaust module. At the same time, the excess gas (which may be mixed gas) in the source gas cavity is discharged through the exhaust module before each round of source gas injection, so as to ensure the stability of the source gas content and gas ratio in each round. The gases are evenly mixed in a stable volume and pressure ratio in each round, so that the gas in the mixing cavity can be evenly mixed within a unit volume. When configuring the gas in rounds, the gas distribution can be stopped in time when the threshold of the mixing cavity reaches the setting, so as not to cause the phenomenon of excessive gas configuration and inability to fill the tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic diagram of the flow structure of a gas distribution control system based on the volumetric method provided in this application;
[0020] Figure 2 A schematic diagram of an operating system of a gas distribution control system based on the volumetric method provided in this application. DETAILED DESCRIPTION
[0021] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.
[0022] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but only represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict.
[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0024] like Figure 1 , Figure 2As shown, this embodiment proposes a gas distribution control system based on the volumetric method, including a gas distribution cavity group module, a temperature control and heating module and a pressure transmitter, the gas distribution cavity group module includes a source gas cavity A, a source gas cavity C and a mixing gas cavity B, the inner ends of the source gas cavity A, the source gas cavity C and the mixing gas cavity B are respectively connected to cylinders, the inner ends of the cylinders are respectively connected to speed regulating joints, and pneumatic valves A and C are respectively arranged between the source gas cavity A, the source gas cavity C and the mixing gas cavity B, and the pneumatic valves A and C are respectively connected to the signals of the pneumatic valves A and C are respectively connected to the signals of the position sensors A and C, the outer ends of the source gas cavity A and the source gas cavity C are respectively provided with pneumatic valves A and C, and the source gas cavity A, the mixing gas cavity B and the source gas cavity C are respectively connected to the pressure transmitter.
[0025] A gas source concentration selection module is provided at the outer end of the source gas cavity A. The gas source concentration selection module includes a high concentration module and a low concentration module. The high concentration module controls the injection of pure hydrogen into the source gas cavity A, and the low concentration module controls the injection of 1% standard gas into the source gas cavity A.
[0026] The gas in the source gas cavity C is air, and the gas pressure conditions in the source gas cavity A and the source gas cavity C are monitored by a pressure transmitter.
[0027] The cylinder in the mixing chamber B reciprocates to mix the gas.
[0028] Three groups of heating belts are arranged in the temperature control heating module, and the three groups of heating belts are respectively wrapped around the outer ends of the source gas cavity A, the source gas cavity C and the mixing gas cavity B, and the three groups of heating belts are controlled by the temperature control heating module signal.
[0029] The gas distribution cavity group module also includes a pressurized gas filling module, an exhaust module and an exhaust module. The pressurized gas filling module is used for the injection of the second round and each subsequent round of source gas. The exhaust module includes an exhaust valve and a vacuum pump. The exhaust module is used for internal cleaning after each round of gas mixing is completed. The exhaust module is used for gas recovery in the source gas cavity A and the source gas cavity C in each round.
[0030] An RGA gas analysis module is provided at the outer end of the gas mixing chamber B, a pneumatic valve is connected between the RGA gas analysis module and the gas mixing chamber B, and the RGA gas analysis module is used to monitor the gas distribution degree in real time.
[0031] As a preferred embodiment, based on the above method, further, the gas distribution process is:
[0032] First, select the concentration of the gas distribution:
[0033] Ensure that air is injected into the source air cavity C, and the threshold of the source air cavity C is C (C < 5 bar). The threshold of the injected air is monitored by the pressure transmitter connected to the source air cavity C. When the threshold is reached, the C pneumatic valve is closed to stop injecting air into the source air cavity C.
[0034] When selecting a high gas concentration for gas distribution, hydrogen injection is selected through the gas source concentration selection module, and the mixed gas formed by mixing the source gas chamber A and the source gas chamber C is set to ensure that its output concentration is a (a <1000000>), with the unit set to pa. At this time, the gas source is a mixture of hydrogen and air. The threshold formula for the source gas chamber A is A = aC / (1000000 - a), and the unit of A is set to bar. At this time, the pressure transmitter monitoring the source gas chamber A uses this threshold formula. When the threshold is reached, the A pneumatic valve is closed to stop injecting hydrogen into the source gas chamber A;
[0035] When selecting a low gas concentration for gas distribution, 1% standard gas injection is selected through the gas source concentration selection module, and the output concentration of the mixed gas formed by mixing the source gas chamber A and the source gas chamber C is set to a (a < 10000), with the unit set to pa. At this time, the gas source is a mixture of 1% standard gas and air. The threshold formula for the source gas chamber A is A = 100aC / (1000000 - 100a), and the unit of A is set to bar. At this time, the pressure transmitter monitoring the source gas chamber A uses this threshold formula. When the threshold is reached, the A pneumatic valve is closed to stop injecting 1% standard gas into the source gas chamber A;
[0036] When both the source gas chamber A and the source gas chamber C are injected to the threshold critical value, at this time, the pneumatic valve corresponding to the mixing gas chamber B is opened through the system. The cylinders of the source gas chamber A and the source gas chamber C adjust the corresponding speed control joints to inject the mixed gas into the mixing gas chamber B at an appropriate speed. The cylinder in the mixing gas chamber B adjusts the corresponding speed control joint to reciprocate 5 times at an appropriate speed to uniformly mix the source gas. When the cylinders in the source gas chamber A and the source gas chamber C are pushed to the topmost position, the A position sensor and the C position sensor are triggered, and the pneumatic valves between the source gas chamber A and the source gas chamber C and the mixing gas chamber B are closed to stop injecting the mixed gas. The corresponding exhaust valves and vacuum pumps in the source gas chamber A and the source gas chamber C are opened to evacuate the source gas chamber A and the source gas chamber C, and then the pressure in the source gas chamber A and the source gas chamber C is adjusted to the corresponding threshold vacuum state through the pressurization and gas filling module. At this time, the A pneumatic valve and the B pneumatic valve corresponding to the intake are automatically opened to introduce the source gas. Before each gas filling, the RGA gas analysis module is used to monitor whether the gas in the mixing gas chamber B is properly mixed. If the gas mixing is not completed, the pressurization and gas filling module continues to operate. If the gas mixing is completed, the system prompts that the gas mixing is completed. After the gas mixing is completed, the excess gas in the mixing gas chamber A and the mixing gas chamber B is recovered through the exhaust module.
[0037] When this application is in use: it can automatically determine whether the gas mixing is completed, and can recycle the excess gas through the exhaust module after the gas mixing is completed. At the same time, before each round of source gas injection, the excess gas (possibly the mixed gas) in the source gas chamber is discharged through the exhaust module to ensure the stability of the source gas content and the gas ratio in each round.
[0038] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.
Claims
1. A gas distribution control system based on the volumetric method, comprising a gas distribution cavity group module, a temperature control and heating module and a pressure transmitter, characterized in that: The air distribution cavity group module includes a source air cavity A, a source air cavity C, and a mixing air cavity B. The inner ends of the source air cavity A, the source air cavity C, and the mixing air cavity B are respectively connected to cylinders, and the inner ends of the cylinders are respectively connected to speed regulating joints. A pneumatic valve A and a pneumatic valve C are respectively arranged between the source air cavity A, the source air cavity C, and the mixing air cavity B. The pneumatic valve A and the pneumatic valve C are respectively connected to the signals of the position sensor A and the position sensor C. The outer ends of the source air cavity A and the source air cavity C are respectively provided with a pneumatic valve A and a pneumatic valve C. The source air cavity A, the mixing air cavity B, and the source air cavity C are respectively connected to pressure transmitters.
2. A gas distribution control system based on the volumetric method according to claim 1, characterized in that: The outer end of the source gas cavity A is provided with a gas source concentration selection module, which includes a high concentration module and a low concentration module. The high concentration module controls the injection of pure hydrogen into the source gas cavity A, and the low concentration module controls the injection of 1% standard gas into the source gas cavity A.
3. The gas distribution control system based on the volumetric method according to claim 1, characterized in that: The gas in the source air cavity C is air, and the air pressure conditions in the source air cavity A and the source air cavity C are monitored by a pressure transmitter.
4. The gas distribution control system based on the volumetric method according to claim 1, characterized in that: The cylinder in the mixing chamber B reciprocates to mix the gas.
5. The gas distribution control system based on the volumetric method according to claim 1, characterized in that: Three groups of heating belts are arranged in the temperature control heating module, and the three groups of heating belts are respectively wrapped around the outer ends of the source gas cavity A, the source gas cavity C and the mixing gas cavity B, and the three groups of heating belts are controlled by the temperature control heating module signal.
6. The gas distribution control system based on the volumetric method according to claim 1, characterized in that: The gas distribution cavity group module also includes a pressurized gas filling module, an air extraction module and an exhaust module. The pressurized gas filling module is used for the injection of the second round and each subsequent round of source gas. The air extraction module includes an air extraction valve and a vacuum pump. The air extraction module is used for internal cleaning after each round of gas mixing is completed. The exhaust module is used for gas recovery in the source gas cavity A and the source gas cavity C in each round.
7. The gas distribution control system based on the volumetric method according to claim 1, characterized in that: An RGA gas analysis module is provided at the outer end of the gas mixing chamber B, a pneumatic valve is connected between the RGA gas analysis module and the gas mixing chamber B, and the RGA gas analysis module is used to monitor the gas distribution degree in real time.