CN211718768U - Electronic flow control system - Google Patents
Electronic flow control system Download PDFInfo
- Publication number
- CN211718768U CN211718768U CN201921938335.2U CN201921938335U CN211718768U CN 211718768 U CN211718768 U CN 211718768U CN 201921938335 U CN201921938335 U CN 201921938335U CN 211718768 U CN211718768 U CN 211718768U
- Authority
- CN
- China
- Prior art keywords
- flow
- control
- proportional valve
- flow sensor
- control system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of the industrial analysis technique and specifically relates to an electron flow control system, including electronic proportional valve, flow sensor and control circuit module, the air supply is inputed to flow sensor through the electronic proportional valve, and flow sensor detects current air supply flow and exports to control circuit module, and control circuit module compares the default of current air supply flow and flow, the control signal of output regulation electronic proportional valve aperture. The flow control system has the advantages that the hardware structure of the flow control system in the prior art is simplified, digital and automatic flow control is realized, the closed-loop control loop technology and the calculation control algorithm PID are used, so that the control repeatability is high, and the control mode is not influenced by the outside and the structure.
Description
Technical Field
The utility model relates to an industrial analysis technical field especially relates to an electron flow control system.
Background
The conventional gas flow control system mainly adopts a gas pressure stabilizing valve component, a common flow stabilizing valve mainly controls the flow in a gas flow path through mechanical action, the current flow value cannot be really displayed, and the accuracy is low even if the gas flow is detected through an auxiliary tool.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the surge damping valve part among the prior art and in work, mainly controlling the flow in the gas flow path with mechanical action, unable real present flow value that demonstrates even detect out gas flow through appurtenance, the also lower shortcoming of accuracy, and the electron flow control system who provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the electronic flow control system comprises an electronic proportional valve, a flow sensor and a control circuit module, wherein an air source is input to the flow sensor through the electronic proportional valve, the flow sensor detects the current air source flow and outputs the current air source flow to the control circuit module, and the control circuit module compares the current air source flow with a preset value of the flow and outputs a control signal for adjusting the opening of the electronic proportional valve.
Preferably, the electronic proportional valve is composed of an annealed material and a leaf spring is arranged in the electronic proportional valve.
Preferably, the flow sensor is a thermal flow sensor.
Preferably, the flow sensor and the electronic proportional valve are mounted on an air passage valve block, an air passage hole communicated with the air outlet hole of the flow sensor is formed in the air passage valve block, and the air passage valve block is mounted on the shell of the circuit board.
Preferably, the air passage valve block is made of stainless steel material.
The utility model provides an electron flow control system, beneficial effect lies in:
the flow control system has the advantages that the hardware structure of the flow control system in the prior art is simplified, digital and automatic flow control is realized, the closed-loop control loop technology and the calculation control algorithm PID are used, so that the control repeatability is high, and the control mode is not influenced by the outside and the structure.
The utility model discloses simple structure, the simple operation, steady voltage valve part among the solution prior art that can be fine is in work, mainly controls the flow in the gas flow path with mechanical action, can't really demonstrate current flow value, even detect out gas flow through appurtenance, the also lower shortcoming of accuracy has stronger practicality.
Drawings
FIG. 1 is a schematic diagram of the present invention;
fig. 2 is a schematic structural diagram of a control unit in the present invention;
fig. 3 is a schematic diagram of a hardware structure of the middle flow control system of the present invention.
In the figure: 1-gas path valve block, 2-flow sensor, 2, 3-electronic proportional valve, 4-shell and 5-control circuit module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-3, an electronic flow control system includes an electronic proportional valve 3, a flow sensor 2 and a control circuit module 5, wherein a gas source is input to the flow sensor 2 through the electronic proportional valve 3, the flow sensor 2 detects a current gas source flow and outputs the current gas source flow to the control circuit module 5, the control circuit module 5 compares the current gas source flow with a preset value of the flow, and outputs a control signal for adjusting the opening of the electronic proportional valve 3, the control circuit module 5, the flow sensor 2 and the electronic proportional valve 3 form an electronic closed-loop control circuit, according to a comparison between a preset gas pressure or flow and a current actual pressure or flow, a difference between the preset value and the actual value adjusts the valve core opening of the electronic proportional valve 3, so that the control pressure or flow approaches the set pressure or flow value, and the prior art is avoided:
the gas pressure control precision completely depends on an auxiliary tool pressure gauge head for measuring the gas pressure, the consistency and the accuracy of a gas pressure value in the operation process can not be ensured, and certain artificial reading errors, poor gas flow control precision and poor gas flow control precision exist when the gas pressure gauge is read;
when the gas pressure needs to be changed, the knob of the valve body needs to be manually adjusted, and the pressure of the valve body needs to be detected, so that the operation is troublesome, and the automation degree of gas pressure control is poor;
when the lifting pressure is changed to change the gas flow, the response time of the rotary pressure valve is relatively long, and the quick response cannot be realized;
the mechanical knob is used for adjusting the opening degree of a valve core of the needle valve inside the mechanical knob, the mechanical knob is greatly influenced by human and the outside, the mechanical knob cannot be adjusted to the same position every time, and the consistency is poor;
the traditional flow control system cannot directly obtain the flow to be controlled, cannot display the current gas pressure in real time, and can only use an auxiliary tool pressure gauge to measure the gas pressure and estimate or use a soap foam flowmeter to measure the gas flow.
The feedback control unit formed by the flow sensor 2 and the control circuit module 5 is provided with a communication interface, the body flow channel, the flow sensor 2 and the electronic proportional valve 3 form a whole gas measurement passage, the control circuit module 5, the flow sensor 2 and the electronic proportional valve 3 form a feedback control unit, and the provided communication interface is convenient to be matched with other equipment to complete a specific function.
The electronic proportional valve 3 is made of an annealing material, and the leaf spring is arranged in the electronic proportional valve 3, so that the problem of flow fluctuation caused by vibration caused by radial runout and friction of the valve core is effectively solved, the flow control characteristic capable of keeping the hysteresis coefficient within percent is possessed, and the accuracy of the flow control system is further improved.
The flow sensor 2 and the electronic proportional valve 3 are installed on a gas circuit valve block 1, a gas circuit hole communicated with a gas outlet hole of the flow sensor 2 is formed in the gas circuit valve block 1, the gas circuit valve block 1 is installed on a shell 4 of a circuit board, when a gas source is input, gas firstly passes through the electronic proportional valve 3 and then passes through the flow sensor 2, and the gas circuit valve block 1, the flow sensor 2 and the electronic proportional valve 3 together form a small gas circuit control unit.
The gas circuit valve block 1 is made of stainless steel materials, the shell 4 is a metal plate shell, when gas passes through a gas circuit hole in the gas circuit valve block 1, the gas circuit valve block 1 and the shell 4 made of stainless steel can be effectively prevented from being oxidized and corroded due to chemical characteristics and temperature of the gas, the service life of the gas circuit valve block 1 and the shell 4 is shortened, and therefore the practicability of the gas circuit valve block is further improved.
The technical scheme adopts a thermal gas flow sensor 2 technology, and controls the gas flow by using the electronic proportional valve 3 with a small caliber, thereby ensuring the control precision and having high gas flow control precision. By using a closed-loop control loop technology and a calculation control algorithm PID, the repeatability of control is high, the control mode is not influenced by the outside and the structure, and the repeatability of gas flow control is high.
The working principle is as follows:
the electronic proportional valve 3 and the flow sensor 2 are fixed on the same gas circuit valve block 1, the gas circuit valve block 1 is screwed on the shell 4 and fixed through fixing parts such as bolts, and pins of the flow sensor 2 are connected on a circuit board in the control circuit module 5.
When the gas-liquid separator works, a gas source is input into the electronic proportional valve 3 and is input into the flow sensor 2 through the output end of the electronic proportional valve 3, the gas source is converted into a flow detection signal by the flow sensor 2 and is input into the control circuit module 5, the flow detection signal is output by the control circuit module 5 and is compared with a preset value of air pressure or flow, the PID algorithm adjusts output voltage to control the opening of the electronic proportional valve 3, and finally gas flows into the gas circuit valve block 1 and is output through the output port of the gas circuit valve block 1;
gas gets into from flow sensor 2 air inlet, because the special construction of flow sensor 2 passageway, gas carries out the flow of the less pressure loss of flow in flow sensor 2 inside, preheat the flow sensor 2 after heating, inside temperature is higher than the entering air current temperature, thereby the flow size of the temperature difference volume principle measurement gas through air inlet and gas outlet, then the flow detection signal input that flow sensor 2 measured is to control circuit module 5, export after the signal conversion, the measurement of gas flow has just been accomplished, the delivery outlet through gas circuit valve block 1 at last flows.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An electronic flow control system, characterized by: the electronic proportional valve comprises an electronic proportional valve, a flow sensor and a control circuit module, wherein an air source is input to the flow sensor through the electronic proportional valve, the flow sensor detects the current air source flow and outputs the current air source flow to the control circuit module, and the control circuit module compares the current air source flow with a preset value of the flow and outputs a control signal for adjusting the opening of the electronic proportional valve.
2. An electronic flow control system according to claim 1, wherein: the electronic proportional valve is made of an annealing material, and a leaf spring is arranged in the electronic proportional valve.
3. An electronic flow control system according to claim 1, wherein: the flow sensor is a thermal flow sensor.
4. An electronic flow control system according to any of claims 1 to 3, wherein: the flow sensor and the electronic proportional valve are installed on an air path valve block, an air path hole communicated with the air outlet hole of the flow sensor is formed in the air path valve block, and the air path valve block is installed on the shell of the circuit board.
5. An electronic flow control system according to claim 4, wherein: the air passage valve block is made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921938335.2U CN211718768U (en) | 2019-11-08 | 2019-11-08 | Electronic flow control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921938335.2U CN211718768U (en) | 2019-11-08 | 2019-11-08 | Electronic flow control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211718768U true CN211718768U (en) | 2020-10-20 |
Family
ID=72815711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921938335.2U Active CN211718768U (en) | 2019-11-08 | 2019-11-08 | Electronic flow control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211718768U (en) |
-
2019
- 2019-11-08 CN CN201921938335.2U patent/CN211718768U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439125A (en) | Device and method for detecting pressure regulation performance of gas pressure regulator | |
| CN108534346A (en) | A kind of gas heater control method and gas heater | |
| CN107389160B (en) | Detection device and detection method for detecting gas meter card | |
| CN103088872A (en) | Water supplying system for flow device | |
| CN101571417B (en) | Calibration method of flowmeter | |
| CN104165661B (en) | A kind of low pressure loss differential pressure flowmeter and its scaling method and flow metering method | |
| CN109186815A (en) | A kind of low temperature High Mach number detecting probe temperature calibration device | |
| CN211718768U (en) | Electronic flow control system | |
| CN213579975U (en) | Fuel cell system air tightness testing device | |
| CN104197998B (en) | Low pressure loss leakage detecting type differential pressure type flow detector and scaling method and measuring method | |
| CN201014015Y (en) | Electronic type dynamic balancing electric regulating valve | |
| CN219015429U (en) | Mass flowmeter calibrating device | |
| CN203080594U (en) | Water supply system for flow device | |
| CN206757417U (en) | Mass flow controller and flow control system | |
| CN203336239U (en) | Precision gas flowmeter | |
| CN209432347U (en) | A kind of flow type micro-pressure sensor calibration equipment | |
| CN210949381U (en) | Shield constructs pneumatic grease pump injection speed closed-loop control system | |
| CN203070122U (en) | Numerical control gas supply control device for testing gas water heater | |
| CN219223837U (en) | Novel thermal type gas mass flowmeter | |
| CN220398688U (en) | Start flow detection device of gas meter | |
| CN202002662U (en) | Force balanced type transmitter for strain displacement detecting elements | |
| CN219642116U (en) | Remote automatic control calibration equipment for gas | |
| CN214621326U (en) | Meter-valve integrated flow monitoring device | |
| CN210243308U (en) | High-precision wide-range portable flue gas sampler | |
| CN214951687U (en) | Flow disc flow measuring device based on mass flow feedback adjustment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |