A small power adjustable gas boost system

Abstract

The utility model provides a small -size power adjustable gas pressurization system, through setting up gas pressurization pump, regulating valve and with regulating valve control connection's PLC controller, and the gas pressurization pump's air inlet is connected with first pressure transmitter and is transmitted to PLC controller with its detected signal, the gas pressurization pump's air outlet is connected with second pressure transmitter and is transmitted to PLC controller with its detected signal, regulating valve both ends are connected with first control valve and second control valve, and first control valve front end is connected with gas pressurization pump, second control valve rear end is connected into driving gas inlet source, and still parallelly connected with first auxiliary branch between driving gas inlet source and first control valve, and is equipped with third control valve on auxiliary branch, realize through PLC controller control pneumatic regulating valve opening, and then control gas driving gas pressurization pump driving gas flow and pressure, realize the effect of change gas driving gas pressurization pump power, and then accurate control is carried out to system gas pressure.

Description

Technical Field

[0001] This utility model belongs to the field of chemical gas pressurization technology, and specifically relates to a small-sized gas pressurization system with adjustable power. Background Technology

[0002] In small-scale chemical production / experiments involving gas preparation, gas collection remains a challenge. Traditional equipment such as diaphragm compressors, piston compressors, and screw compressors are large, powerful, and costly, failing to meet the needs of small-scale experiments and wasting resources to some extent. Smaller equipment, such as small piston compressors, cannot achieve sufficiently high pressures. Since the gases to be collected are flammable and explosive, the equipment itself must be explosion-proof, rendering most equipment unsuitable. A gas-driven gas booster pump is currently available with a simple structure, using gas drive and without explosion-proof design issues, but it lacks variable frequency intelligent control and therefore cannot be directly applied to the aforementioned situations.

[0003] In the early stages of chemical production, small-scale experiments are often required. These experiments utilize equipment that is small in size and low in power, making conventional mechanical equipment unsuitable or impossible to use. While other equipment can often be replaced by custom-made products, there are currently no products on the market that directly meet the requirements for gas collection and high outlet pressure. The common solution is to use expensive large-scale equipment, which results in high experimental costs and low equipment utilization. Furthermore, simply collecting gas without pressurization and storage may result in insufficient product gas volume to meet analytical requirements. Existing gas pressurization equipment on the market is relatively simple, possessing only basic gas pressurization functions and lacking control capabilities. Therefore, its applications are mostly limited to instrument calibration and interface leak detection, and it cannot be used in chemical production and other similar fields.

[0004] Traditional experimental equipment is expensive, occupies a lot of space and resources, but cannot achieve its maximum effect; while existing single components cannot achieve intelligent control, thus narrowing its application scope. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a small, power-adjustable gas booster system that enables precise control of the system's gas pressure.

[0006] To solve the above technical problems, the technical solution adopted by this utility model is as follows: A small, power-adjustable gas booster system includes a gas booster pump, a regulating valve, and a PLC controller connected to the regulating valve. A first pressure transmitter is connected to the inlet of the gas booster pump and transmits its detected signal to the PLC controller. A second pressure transmitter is connected to the outlet of the gas booster pump and transmits its detected signal to the PLC controller. The regulating valve is connected to a first control valve and a second control valve at both ends, and the front end of the first control valve is connected to a gas booster pump, while the rear end of the second control valve is connected to a driving gas intake source. A first auxiliary branch is connected in parallel between the driving air intake source and the first control valve, and a third control valve is provided on the auxiliary branch.

[0007] A second auxiliary branch is connected in parallel between the driving air intake source and the regulating valve, and a fourth control valve is provided on the second auxiliary branch.

[0008] The regulating valve includes a single-seat diaphragm actuator and an electrically intelligent valve positioner.

[0009] The first control valve, the second control valve, and the third control valve are all manual valves.

[0010] The fourth control valve is a manual valve.

[0011] The PLC controller controls the opening degree of the regulating valve.

[0012] The beneficial effects of this utility model are: (1) This small power adjustable gas booster system is equipped with a gas booster pump, a regulating valve and a PLC controller connected to the regulating valve. The gas booster pump is connected to a first pressure transmitter at the inlet and transmits the detected signal to the PLC controller. The gas booster pump is connected to a second pressure transmitter at the outlet and transmits the detected signal to the PLC controller. The regulating valve is connected to a first control valve and a second control valve at both ends. The front end of the first control valve is connected to the gas booster pump and the rear end of the second control valve is connected to the driving gas source. The driving gas source and the first control valve are connected in parallel to a first auxiliary branch and a third control valve is provided on the auxiliary branch. The PLC controller controls the opening of the pneumatic regulating valve, thereby controlling the flow rate and pressure of the gas-driven gas booster pump, thereby changing the power of the gas-driven gas booster pump and thus accurately controlling the system pressure.

[0013] (2) A first auxiliary branch is connected in parallel between the driving air intake source and the first control valve, and a third control valve is provided on the auxiliary branch. When the regulating valve malfunctions, the third control valve can be manually controlled to realize the manual control of the booster pump. A second auxiliary branch is also connected in parallel between the driving air intake source and the regulating valve, and a fourth control valve is provided on the second auxiliary branch. When the regulating valve is damaged, the driving air intake of the regulating valve can be cut off, thereby improving the accuracy of the booster system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0015] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0016] This invention provides a small, power-adjustable gas booster system, such as... Figure 1 As shown.

[0017] A small, power-adjustable gas booster system includes a gas booster pump 9, a regulating valve 5, and a PLC controller 12 connected to the regulating valve 5. A first pressure transmitter 10 is connected to the inlet of the gas booster pump 9 and transmits the detected signal to the PLC controller 12. A second pressure transmitter 11 is connected to the outlet of the gas booster pump 9 and transmits the detected signal to the PLC controller 12. The PLC controller 12 controls the opening degree of the regulating valve 5 according to the detected pressure value.

[0018] The regulating valve 5 is connected to a first control valve 7 and a second control valve 6 at both ends. The front end of the first control valve 7 is connected to the gas booster pump 9, and the rear end of the second control valve 6 is connected to the driving air source to drive the booster pump. A first auxiliary branch is connected in parallel between the driving air source and the first control valve 7, and a third control valve 8 is provided on the first auxiliary branch. In this embodiment, the first control valve 7, the second control valve 6, and the third control valve 8 are all manual valves. When the regulating valve 5 malfunctions, the third control valve 8 can be manually controlled to manually control the operation of the booster pump.

[0019] A second auxiliary branch is connected in parallel between the driving air intake source and the regulating valve 5, and a fourth control valve 4 is provided on the second auxiliary branch as the air source valve for the regulating valve. When the regulating valve 5 is damaged, the driving air intake of the regulating valve can be cut off. The fourth control valve 4 is also a manual valve.

[0020] The control valve can be composed of a single-seat diaphragm actuator and an electric intelligent valve positioner. It can also be a piston actuator, a fork actuator, a diaphragm actuator, or a rack and pinion actuator. The positioner can be an electric positioner, a pneumatic positioner, or an electric intelligent positioner, and the control valve can be any combination of these.

[0021] More specifically, the first pressure transmitter 10 connected to the inlet of the gas booster pump 9 transmits the inlet pressure signal of the booster pump to the PLC controller 12 through the pressure transmitter signal and power line 1. The outlet pressure signal of the gas booster pump 9 is transmitted to the PLC controller 12 through the pressure transmitter signal and power line 2. The PLC controller 12 and the regulating valve 5 are connected through the power and signal output lines 3 of the PLC controller, which simultaneously supplies power to the regulating valve and controls its opening. The regulating valve can control the opening of the regulating valve 5 according to the signal given by the power and signal output lines 3 of the PLC controller.

[0022] The second pressure transmitter 11 is an outlet pressure transmitter, which can detect the outlet pressure of the gas booster system and display it on the user interface for easy observation by the operator. It also serves as a protection device: when the outlet pressure reaches the system limit, it will forcibly shut down the gas booster system, that is, close the regulating valve, so that the outlet pressure cannot rise further. At the same time, it can also control the system according to the outlet pressure, such as in application scenarios where the outlet pressure is required to be 1 MPa regardless of the inlet pressure.

[0023] like Figure 1 As shown, in chemical production, the gaseous materials produced can be transformed from low-pressure gas to high-pressure gas after passing through pipelines and booster pumps. The structures marked "in" in the diagram are inlet pipelines, and the structures marked "out" are exhaust pipelines. These parts are connected by pipes, and the joints are connected to other devices using metal connections.

[0024] During operation, the booster system is connected to the production unit. The gas generated by the chemical production unit is introduced through the inlet pipeline in, causing the pressure of the booster system to rise. The increased pressure is detected by the first pressure transmitter 10 located at the inlet of the booster system. Subsequently, the first pressure transmitter 10 converts the pressure signal into a 4-20mA electrical signal, which is transmitted to the PLC controller 12 through the pressure transmitter instrument line 1 at the inlet of the booster pump. In this structure, a PID control program is written. This program has an input value. When the pressure value exceeds the input value, the PID control program starts. This program controls the output electrical signal according to the difference between the input value and the actual value. This signal is output to the regulating valve 5 through the power and signal output line 3 of the PLC controller. The regulating valve 5 controls the opening of the valve according to the strength of the signal transmitted from the PLC controller 12, thereby controlling the flow rate of the driving gas flowing into the gas booster pump 9. The flow rate of the driving gas of the gas booster pump, in turn, affects its intake rate, thereby achieving the purpose of changing the pumping rate (power).

[0025] In other words, if the intake pressure differs significantly from the set value, the intake pressure transmitter outputs a strong signal, resulting in a large output from the PLC controller, a large opening signal to the regulating valve, a larger valve opening, a larger flow rate, and a faster pumping speed. When the pumping speed exceeds the gas production speed, the intake pressure difference from the set value becomes smaller, or even negligible or negative. In this case, the intake pressure transmitter input signal weakens, the PLC controller outputs a smaller signal, resulting in a smaller valve opening, a smaller flow rate, and a slower pumping speed. When the pumping speed is less than the gas production speed, the intake pressure becomes larger than the set value, thus returning to the initial state. During this cycle, the pumping speed is gradually changed by the controller until it balances with the intake speed, at which point the process becomes stable, achieving good control.

[0026] Application Scenario 1: Import Control In chemical production, the product is a gas. The gas needs to be collected into a 10L steel cylinder. The gas pressurization system is placed at the end of the gas preparation system and at the beginning of the gas collection system. To ensure a stable and controllable reaction process, the inlet pressure of the gas pressurization system is controlled to keep it stable at 25Kpa±2Kpa and the outlet pressure does not exceed 3MPa. Therefore, an outlet pressure transmitter is used for safety interlocking. When the outlet pressure exceeds 3MPa, the gas pressurization system is forcibly shut down.

[0027] Application Scenario 2, Exit Control: In chemical production, gases are produced with drastic pressure fluctuations. Currently, the gas needs to be purified and fed into a purification column. The pressure needs to be maintained at 1.5 MPa. The gas booster system is placed at the end of the gas preparation system and at the beginning of the purification system. To meet the operational requirements, the outlet pressure of the booster system is controlled to stabilize it at 1.5 MPa.

[0028] If this patent uses terms such as "first" and "second" to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing this utility model and simplifying the description, and the above terms have no special meaning.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0030] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

Claims

1. A small, power-adjustable gas booster system, characterized in that: The system includes a gas booster pump, a regulating valve, and a PLC controller connected to the regulating valve. A first pressure transmitter is connected to the inlet of the gas booster pump and transmits the detected signal to the PLC controller. A second pressure transmitter is connected to the outlet of the gas booster pump and transmits the detected signal to the PLC controller. The regulating valve is connected to a first control valve and a second control valve at both ends, and the front end of the first control valve is connected to a gas booster pump, while the rear end of the second control valve is connected to a driving gas intake source. A first auxiliary branch is connected in parallel between the driving air intake source and the first control valve, and a third control valve is provided on the auxiliary branch.

2. The small-scale adjustable power gas booster system according to claim 1, characterized in that: A second auxiliary branch is connected in parallel between the driving air intake source and the regulating valve, and a fourth control valve is provided on the second auxiliary branch.

3. The small-scale adjustable power gas booster system according to claim 1, characterized in that: The regulating valve includes a single-seat diaphragm actuator and an electrically intelligent valve positioner.

4. The small-scale adjustable power gas booster system according to claim 1, characterized in that: The first control valve, the second control valve, and the third control valve are all manual valves.

5. A small, power-adjustable gas booster system according to claim 2, characterized in that: The fourth control valve is a manual valve.

6. A small, power-adjustable gas booster system according to any one of claims 1 to 5, characterized in that: The PLC controller controls the opening degree of the regulating valve.

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