A gas source control system with stable and adjustable environmental parameters

Abstract

The utility model discloses a gas source control system with stable and adjustable environmental parameters, comprising a gas storage chamber, a heating mechanism, an air inlet pipeline, an air outlet pipeline, and a humidification branch and a drying branch arranged in parallel, wherein the air inlet end of the gas storage chamber is connected to the gas source through the air inlet pipeline, the air outlet end of the gas storage chamber is provided with an air outlet pipeline, an air flow control mechanism is provided on the air inlet pipeline, and an electromagnetic valve and an air flow regulating valve are provided on the air outlet pipeline; a heating mechanism is provided inside the gas storage chamber, a humidifier and a dryer are provided on the humidification branch and the drying branch, respectively, the air inlet ends of the humidification branch and the drying branch are connected to one side of the gas storage chamber through a one-way valve, respectively, and the air outlet ends of the humidification branch and the drying branch are connected to the other side of the gas storage chamber through an electromagnetic valve, respectively. The utility model has the functions of flow regulation, pressure regulation, temperature regulation, drying and humidification, and the utility model can realize static or dynamic regulation of the gas environment inside the gas storage chamber through the control of the electromagnetic valve on the air outlet pipeline, thereby realizing a gas source with stable output parameters, and has good practicality.

Description

Technical Field

[0001] The utility model belongs to the technical field of air source environment control equipment, and in particular relates to an air source control system with stable and adjustable environmental parameters. Background Art

[0002] With the increasing demand for gas reaction research and carrier gas assisted experiments, a stable and controllable gas source environment is particularly important. However, the gas source processing devices currently on the market have relatively single functions, cannot perform synchronous online regulation of multiple variables, and are expensive. Therefore, the utility model provides a gas source supply system that can dynamically and statically adjust the gas source environment. Secondly, it can monitor gas flow, pressure, temperature, humidity, dew point and other parameters in real time to meet the gas supply working condition requirements of the experiment. Utility Model Content

[0003] The utility model aims to provide a gas source control system with stable and adjustable environmental parameters, aiming to solve the above-mentioned problems.

[0004] The utility model is mainly realized through the following technical solutions:

[0005] A gas source control system with stable and adjustable environmental parameters comprises an air storage chamber, a heating mechanism, an air inlet pipeline, an air outlet pipeline, and a humidifying branch and a drying branch arranged in parallel, wherein the air inlet end of the air storage chamber is connected to the air source via the air inlet pipeline, the air outlet end of the air storage chamber is provided with an air outlet pipeline, the air inlet pipeline is provided with an air flow control mechanism, and the air outlet pipeline is provided with an electromagnetic valve and an air flow regulating valve; a heating mechanism is provided inside the air storage chamber, a humidifier and a dryer are provided on the humidifying branch and the drying branch, the air inlet ends of the humidifying branch and the drying branch are respectively connected to one side of the air storage chamber via a one-way valve, and the air outlet ends of the humidifying branch and the drying branch are respectively connected to the other side of the air storage chamber via an electromagnetic valve.

[0006] In order to better realize the utility model, it further includes a reflux pipe connected to the air storage chamber, and a parallel humidification branch and a drying branch are arranged in the middle of the reflux pipe, the air inlet ends of the humidification branch and the drying branch are respectively connected to the air inlet end of the reflux pipe through a one-way valve, and the air outlet ends of the humidification branch and the drying branch are respectively connected to the air outlet end of the reflux pipe through an electromagnetic valve; the air outlet end and the air inlet end of the reflux pipe are respectively connected to the air storage chamber through a reflux pump and an electromagnetic valve.

[0007] In order to better realize the present utility model, further, the interior of the air storage chamber is respectively installed with a temperature and humidity detector, a dew point detector and a digital pressure gauge. The temperature and humidity detector is used to measure the temperature and humidity values ​​inside the air storage chamber, the dew point detector is used to measure the dew point of the gas inside the air storage chamber, and the digital pressure gauge is used to measure the air pressure inside the air storage chamber.

[0008] In order to better realize the utility model, further, the airflow regulating valve is a manual regulating valve, and the air outlet pipeline is provided with a solenoid valve, a flow meter, a manual regulating valve and a dew point detector from front to back in sequence, the flow meter is used to detect the flow value of the output gas, and the manual regulating valve is used to control the size of the output airflow.

[0009] In order to better realize the utility model, further, the humidifier is an ultrasonic humidifier, and the dryer is a drying cylinder or a drying box.

[0010] In order to better realize the present utility model, further, the air intake pipeline includes a first air intake branch and a second air intake branch in parallel, and the first air intake branch and the second air intake branch are respectively provided with air flow control mechanisms; the air intake ends of the first air intake branch and the second air intake branch are respectively connected to the air source and the fixed air source, and the air outlet ends thereof are respectively connected to the air intake end of the air storage chamber through a one-way valve.

[0011] In order to better realize the utility model, further, the first air intake branch is provided with a filter, an air pump and a one-way valve in sequence from front to back.

[0012] In order to better realize the utility model, further, an electric proportional valve and a one-way valve are sequentially arranged on the second air intake branch.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model adjusts the humidity of the gas inside the gas storage chamber through a parallel humidification branch and a drying branch, adjusts the gas pressure inside the gas storage chamber through an airflow control mechanism on the air inlet pipeline, adjusts the gas temperature inside the gas storage chamber through a heating mechanism, and adjusts the output gas flow through an airflow regulating valve. The utility model has the functions of flow regulation, pressure regulation, temperature regulation, drying and humidification. The utility model can achieve static or dynamic regulation of the gas environment inside the gas storage chamber through the control of the solenoid valve on the air outlet pipeline, thereby achieving a gas source with stable output parameters, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a principle block diagram of the environmentally stable and adjustable gas source supply system of the utility model;

[0016] Figure 2 The utility model is a flowchart of the use of the environmentally stable and adjustable gas source supply system. DETAILED DESCRIPTION

[0017] Embodiment 1:

[0018] A gas source control system with stable and adjustable environmental parameters comprises an air storage chamber, a heating mechanism, an air inlet pipeline, an air outlet pipeline and a return pipe, wherein the air inlet end of the air storage chamber is connected to the air source via the air inlet pipeline, and the air outlet end is provided with an air outlet pipeline, the air inlet pipeline is provided with an air flow control mechanism, and the air outlet pipeline is provided with a solenoid valve and an air flow regulating valve in sequence from front to back.

[0019] A heating mechanism is provided inside the air storage chamber, and a return pipe is provided in communication with the air storage chamber. A humidity regulating pipeline is provided in the middle of the return pipe, and the humidity regulating pipeline includes a humidifying branch and a drying branch connected in parallel. A humidifier and a dryer are provided on the humidifying branch and the drying branch, respectively. The air inlet ends of the humidifying branch and the drying branch are respectively connected to the outlet end of the return pipe through a one-way valve, and the air outlet ends are respectively connected to the inlet end of the return pipe through an electromagnetic valve. A reflux pump is provided at the inlet end of the return pipe, and a electromagnetic valve is provided at the outlet end.

[0020] Preferably, the airflow regulating valve is a manual regulating valve, and the air outlet pipeline is provided with a solenoid valve, a flow meter, a manual regulating valve and a dew point detector from front to back in sequence, the flow meter is used to detect the flow value of the output gas, and the manual regulating valve is used to control the size of the output airflow.

[0021] Preferably, the air intake pipeline includes a first air intake branch and a second air intake branch in parallel, and the first air intake branch and the second air intake branch are respectively provided with air flow control mechanisms; the air intake ends of the first air intake branch and the second air intake branch are respectively connected to an air source and a fixed air source, and the air outlet ends of the first air intake branch and the second air intake branch are respectively connected to the air intake end of the air storage chamber through a one-way valve. Further, a filter, an air pump and a one-way valve are sequentially provided on the first air intake branch from front to back. Among them, the air flow control mechanism on the first air intake branch is an air pump. An electric proportional valve and a one-way valve are sequentially provided on the second air intake branch from front to back. Among them, the air flow control mechanism on the second air intake branch is an electric proportional valve.

[0022] The utility model has the functions of flow regulation, pressure regulation, temperature regulation, drying and humidification. The utility model adjusts the humidity of the gas inside the gas storage chamber through the humidity regulation pipeline, adjusts the gas pressure inside the gas storage chamber through the first and second air inlet branches connected in parallel, adjusts the gas temperature inside the gas storage chamber through the heating mechanism, and adjusts the output gas flow through the manual regulating valve. The utility model can statically or dynamically adjust the gas environment inside the gas storage chamber by controlling the solenoid valve on the gas outlet pipeline, thereby realizing a gas source with stable output parameters, and has good practicality.

[0023] Embodiment 2:

[0024] An air source control system with stable and adjustable environmental parameters is used to provide a stable and reliable air source environment. It has the functions of flow regulation, pressure regulation, temperature regulation, drying and humidification, and can monitor instantaneous flow, cumulative flow, pressure, temperature, humidity, dew point and other parameters in real time. Figure 1 As shown, the system includes an air storage chamber, an air inlet pipeline, an air outlet pipeline and a humidity regulating pipeline; the air inlet end of the air storage chamber is connected to the air source through the air inlet pipeline, and the air outlet end is connected to the air outlet pipeline for air supply. The top of the air storage chamber is connected to the humidity regulating pipeline for regulating the humidity of the gas inside the air storage chamber, and a heating mechanism is provided at the bottom of the air storage chamber.

[0025] Preferably, the air intake pipeline includes two parallel air intake channels, and a powered fixed air source or an unpowered air source can be used. The two parallel air intake channels are connected to the air intake end of the air storage chamber using a one-way valve to achieve isolation and avoid air intake interference. Specifically, the fixed air source is compressed air or an inert gas with a certain pressure, and the inert gas can be nitrogen. The corresponding air intake channel uses an electric proportional valve to adjust the intake pressure and flow of the fixed air source, and then enters the air storage chamber through the one-way valve 1. Furthermore, when an air source is used, the corresponding air intake channel uses an adjustable speed air pump to dynamically adjust the intake flow of the air source, and the air source enters the air storage chamber through the filter, the air pump, and the one-way valve 2 in turn.

[0026] Preferably, a heating wire is installed at the bottom of the gas storage chamber to heat the gas temperature in the room. Furthermore, a temperature and humidity detector is installed above the gas storage chamber to measure the temperature and humidity values ​​in the room in real time; a digital pressure gauge is used to measure the air pressure in the feedback room; and a dew point detector 1 is used to measure the dew point of the indoor gas, and can also perform auxiliary measurement of temperature and humidity. The temperature and humidity detector, digital pressure gauge and dew point detector are all existing commercial products and are existing technologies, so they will not be described in detail.

[0027] Preferably, the humidity regulating pipeline is composed of a drying branch and a humidifying branch in parallel, and the first and last ends of the drying branch and the humidifying branch are respectively provided with a one-way valve 3 and a solenoid valve 2 and a one-way valve 4 and a solenoid valve 3, and the drying branch and the humidifying branch are separated by a one-way valve and a solenoid valve to avoid interference. A dryer and a humidifier are respectively provided in the middle of the drying branch and the humidifying branch, and a solenoid valve 1 is provided at the air outlet of the humidity regulating pipeline, and a reflux pump is provided at the air inlet end, which is used to form an air flow cycle for humidity regulation, and the size of the circulating air flow can be adjusted according to the humidity setting speed.

[0028] Preferably, the outlet pipeline is provided with a solenoid valve 4, a flow meter, a manual regulating valve and a dew point detector 2 in sequence. The solenoid valve 4 is used to realize static adjustment and output shutoff in the gas storage chamber, the flow meter is used to detect instantaneous flow and cumulative flow value, the manual regulating valve is used to control the size of the output air flow, and the dew point detector 2 is used to detect the temperature, humidity and dew point value of the output pipeline to compensate for the regulation in the gas storage chamber. The flow meter, manual regulating valve and dew point detector are all existing commercial products and are prior art, so they are not described in detail.

[0029] During the use of the utility model, the control method of each parameter is as follows:

[0030] Output gas flow control: The opening of the manual regulating valve can be directly adjusted according to the process requirements and the reading on the flow meter to make the gas flow reach the output set value.

[0031] Output gas pressure control: PID closed-loop control is adopted. By collecting the air pressure value in the gas storage chamber and performing PID self-tuning operation with the set value inside the PLC controller, an analog voltage signal is output to control the flow rate of the electric proportional valve or the speed of the air pump, thereby ensuring the stability of the pressure in the gas storage chamber.

[0032] Temperature control of output gas: PID closed-loop control is adopted. The temperature value in the gas storage chamber is collected, and PID self-tuning operation is performed inside the PLC controller with the set value, and then a PWM wave is output to control the solid-state relay, so as to adjust the power on and off of the bottom heating wire in real time to ensure the constant temperature in the gas storage chamber.

[0033] Humidity control of output gas: PID closed-loop control is adopted to collect the humidity value in the gas storage chamber in real time, and PID self-tuning operation is performed inside the PLC controller with the set value, and the analog voltage signal is output to control the speed of the reflux pump. When the humidity is greater than the set value, solenoid valve 1, solenoid valve 2 and reflux pump are opened to make the air flow pass through the drying box and then return to the gas storage chamber; when the humidity is less than the set value, solenoid valve 1, ultrasonic humidifier, solenoid valve 3 and reflux pump are opened to make the humidified air flow return to the gas storage chamber.

[0034] Furthermore, if Figure 2 As shown, the utility model comprises the following steps during use:

[0035] ① First, set the parameters such as pressure, temperature, humidity and gas source mode in the gas storage chamber according to the process requirements; determine whether to use a fixed gas source. If so, fully open the electric proportional valve, otherwise turn on the vacuum pump.

[0036] ②Then, open solenoid valve 1-solenoid valve 4 and the reflux pump, and fully open the manual regulating valve.

[0037] ③Execute the purification timing program and perform system purification operations to ensure the purity of the gas composition in the gas storage chamber.

[0038] ④ According to the process requirements, adjust the manual regulating valve to the required gas supply flow;

[0039] ⑤ Then, close the solenoid valve 4 and perform static adjustment in the gas storage chamber first;

[0040] ⑥ Collect pressure detection data, perform PID self-tuning adjustment, and control the opening of the proportional valve or the speed of the vacuum pump;

[0041] ⑦ Collect temperature detection data, perform PID self-tuning adjustment, and control the power on and off of the heating wire;

[0042] ⑧ Collect humidity detection data, perform PID self-tuning adjustment, and control the speed of the reflux pump (if the humidity is greater than the setting + compensation value, the drying circuit is turned on; if the humidity is less than the setting + compensation value, the humidification circuit is turned on).

[0043] ⑨ Determine whether the above indicators have reached the set stable value respectively. If so, open the solenoid valve 4 for dynamic adjustment, collect the temperature, humidity and dew point values ​​of the output pipeline, and adjust and compensate the set temperature and humidity; finally, after the dynamic adjustment is stable, the required gas source environment can be continuously generated.

[0044] The utility model adjusts the humidity of the gas inside the gas storage chamber through the humidity regulating pipeline, adjusts the gas pressure inside the gas storage chamber through the air intake pipeline, adjusts the gas temperature inside the gas storage chamber through the heating mechanism, and adjusts the output gas flow through the manual regulating valve. The utility model has the functions of flow regulation, pressure regulation, temperature regulation, drying and humidification. The utility model can realize static and dynamic gas environment regulation through the control of the solenoid valve at the outlet end of the gas storage chamber, can provide a gas source with stable parameters, and has good practicality.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A gas source control system with stable and adjustable environmental parameters, characterized in that: It includes an air storage chamber, a heating mechanism, an air inlet pipeline, an air outlet pipeline, and a humidifying branch and a drying branch arranged in parallel, the air inlet end of the air storage chamber is connected to the air source through the air inlet pipeline, the air outlet end of the air storage chamber is provided with an air outlet pipeline, the air inlet pipeline is provided with an airflow control mechanism, and the air outlet pipeline is provided with a solenoid valve and an airflow regulating valve; a heating mechanism is provided inside the air storage chamber, a humidifier and a dryer are provided on the humidifying branch and the drying branch, the air inlet ends of the humidifying branch and the drying branch are respectively connected to one side of the air storage chamber through a one-way valve, and the air outlet ends of the humidifying branch and the drying branch are respectively connected to the other side of the air storage chamber through a solenoid valve.

2. The air source control system with stable and adjustable environmental parameters according to claim 1, characterized in that: It also includes a return pipe connected to the air storage chamber, and a parallel humidification branch and a drying branch are arranged in the middle of the return pipe, the air inlet ends of the humidification branch and the drying branch are respectively connected to the air inlet end of the return pipe through a one-way valve, and the air outlet ends of the humidification branch and the drying branch are respectively connected to the air outlet end of the return pipe through an electromagnetic valve; the air outlet end and the air inlet end of the return pipe are respectively connected to the air storage chamber through a reflux pump and an electromagnetic valve.

3. The air source control system with stable and adjustable environmental parameters according to claim 1, characterized in that: The air storage chamber is respectively equipped with a temperature and humidity detector, a dew point detector and a digital pressure gauge. The temperature and humidity detector is used to measure the temperature and humidity values ​​inside the air storage chamber, the dew point detector is used to measure the dew point of the gas inside the air storage chamber, and the digital pressure gauge is used to measure the air pressure inside the air storage chamber.

4. The air source control system with stable and adjustable environmental parameters according to claim 1, characterized in that: The airflow regulating valve is a manual regulating valve. The air outlet pipeline is provided with a solenoid valve, a flow meter, a manual regulating valve and a dew point detector from front to back. The flow meter is used to detect the flow value of the output gas, and the manual regulating valve is used to control the size of the output airflow.

5. The air source control system with stable and adjustable environmental parameters according to claim 1, characterized in that: The humidifier is an ultrasonic humidifier, and the dryer is a drying cylinder or a drying box.

6. A gas source control system with stable and adjustable environmental parameters according to any one of claims 1 to 5, characterized in that: The air intake pipeline includes a first air intake branch and a second air intake branch connected in parallel, and the first air intake branch and the second air intake branch are respectively provided with air flow control mechanisms; the air intake ends of the first air intake branch and the second air intake branch are respectively connected to an air source and a fixed air source, and the air outlet ends thereof are respectively connected to the air intake end of the air storage chamber through a one-way valve.

7. The air source control system with stable and adjustable environmental parameters according to claim 6, characterized in that: The first air intake branch is provided with a filter, an air pump and a one-way valve in sequence from front to back.

8. The air source control system with stable and adjustable environmental parameters according to claim 6, characterized in that: The second air intake branch is provided with an electric proportional valve and a one-way valve in sequence.

Images