CN204101991U - A kind of pressure type flow amount controller - Google Patents
A kind of pressure type flow amount controller Download PDFInfo
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- CN204101991U CN204101991U CN201420490680.5U CN201420490680U CN204101991U CN 204101991 U CN204101991 U CN 204101991U CN 201420490680 U CN201420490680 U CN 201420490680U CN 204101991 U CN204101991 U CN 204101991U
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- dynamic modulus
- proportional control
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Abstract
The utility model discloses a kind of pressure type flow amount controller, comprise gas path module, proportional control valve, pressure transducer and Control Component, described gas path module is connected with gas outlet interface with air intake opening interface, the gas entered from described air intake opening interface delivers to proportional control valve after gas path module, is exported after the adjustment of described proportional control valve by gas outlet interface; Concrete dynamic modulus air-resistor structure is set between the output terminal and gas outlet interface of described proportional control valve, by the hole in concrete dynamic modulus air-resistor structure, constant gaseous tension is converted to constant rate and exports.The utility model have simple and compact for structure, volume is little, can improve the advantage such as reliability and precision.
Description
Technical field
The utility model is mainly concerned with sophisticated analytical instruments field, refer in particular to a kind of be applicable to sophisticated analytical instruments not by the pressure type flow amount controller that environmental pressure affects.
Background technology
In prior art, usually to use in numerous rigorous analysis equipment and the device that controls, such as flow controller are carried out for fluid.Existing pressure type flow amount controller is generally adopt single hole or kapillary 104 as vapour lock, by changing the size of controlled pressure, realizes the control of flow.As shown in Figure 1, this pressure type flow amount controller comprises pressure control module 101, air intake opening 102 and gas outlet 103, is provided with kapillary 104 as vapour lock between gas outlet 103 and pressure control module 101.
For using single micropore or kapillary 104 as vapour lock, have the following disadvantages:
(1) single micropore or kapillary 104 are all single holes, easily block and are inconvenient to safeguard;
(2) kapillary 104 is as vapour lock, because it is long pipeline, can very wasting space and volume during use, and if use bending form, due to the otherness bent at every turn, be also difficult to the consistance ensureing vapour lock;
(3) cost of manufacture of single micropore or kapillary 104 is higher.
Utility model content
The technical problems to be solved in the utility model is just: for prior art exist technical matters, the utility model provide a kind of simple and compact for structure, volume is little, can improve the pressure type flow amount controller of reliability and precision.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of pressure type flow amount controller, comprise gas path module, proportional control valve, pressure transducer and Control Component, described gas path module is connected with gas outlet interface with air intake opening interface, the gas entered from described air intake opening interface delivers to proportional control valve after gas path module, is exported after the adjustment of described proportional control valve by gas outlet interface; Concrete dynamic modulus air-resistor structure is set between the output terminal and gas outlet interface of described proportional control valve, by the hole in concrete dynamic modulus air-resistor structure, constant gaseous tension is converted to constant rate and exports.Concrete dynamic modulus air-resistor structure concrete dynamic modulus air-resistor structure
As further improvement of the utility model: described concrete dynamic modulus air-resistor structure is arranged in vapour lock pedestal, vapour lock air intake opening O type circle is set at the entrance point of concrete dynamic modulus air-resistor structure, vapour lock gas outlet O type circle is set at the endpiece of concrete dynamic modulus air-resistor structure.
As further improvement of the utility model: the output terminal of described proportional control valve is connected with gas outlet interface after gas path module, described concrete dynamic modulus air-resistor structure is connected between gas outlet interface and gas path module by securing member.
As further improvement of the utility model: described concrete dynamic modulus air-resistor structure is metal powder metallurgy vapour lock, high alumina ceramic filter or honeycomb ceramic carrier
As further improvement of the utility model: the air intake opening place of described gas path module connects an air intake opening interface be arranged vertically, and after gas input, side direction outputs to the entrance of proportional control valve again; After the outlet of described proportional control valve is input to gas path module, branch exports, and a road exports Bonding pressure sensor, and another road directly outputs to the input port of concrete dynamic modulus air-resistor structure.
Compared with prior art, the utility model has the advantage of:
1, pressure type flow amount controller of the present utility model, direct use concrete dynamic modulus air-resistor structure realizes the control of delicate flow as vapour lock, the shortcoming using single hole or kapillary as vapour lock can well be avoided, be adapted to portable equipment upper volume little, lightweight, the requirement such as to maintain easily.
2, pressure type flow amount controller of the present utility model, adopts import and the two O type circle of outlet to pin the mode of vapour lock, to promote the consistance of concrete dynamic modulus air-resistor structure for the vapour lock resistance in gas circuit.
Accompanying drawing explanation
Fig. 1 is the principle schematic of electronic flow controller in prior art.
Fig. 2 is the principle schematic of the utility model electronic flow controller.
Fig. 3 is the structural principle schematic diagram of the utility model electronic flow controller.
Fig. 4 is the principle of work schematic diagram of Control Component in the utility model.
Fig. 5 is a kind of instantiation schematic diagram of cylindrical porous gap air-resistor structure.
Fig. 6 is a kind of instantiation schematic diagram of square concrete dynamic modulus air-resistor structure.
Marginal data:
1, air intake opening interface; 2, gas path module; 3, proportional control valve; 4, pressure transducer; 5, Control Component; 6, vapour lock pedestal; 7, gas outlet interface; 8, concrete dynamic modulus air-resistor structure; 9, vapour lock gas outlet O type circle; 10, vapour lock air intake opening O type circle; 31, constant-current drive circuit; 32, signal conditioning circuit; 33, D/A conversion unit; 34, AD conversion unit; 35, data processing unit; 36, storer; 37, external communication unit; 101, pressure control module; 102, air intake opening; 103, gas outlet; 104, kapillary.
Embodiment
Below with reference to Figure of description and specific embodiment, the utility model is described in further details.
As shown in Figures 2 and 3, pressure type flow amount controller of the present utility model, comprise gas path module 2, proportional control valve 3, pressure transducer 4 and Control Component 5, gas path module 2 is connected with gas outlet interface 7 with air intake opening interface 1, the gas entered from air intake opening interface 1 delivers to proportional control valve 3 after gas path module 2, is exported after the adjustment of proportional control valve 3 by gas outlet interface 7.Proportional control valve 3, pressure transducer 4 and Control Component 5 form gaseous tension control module, to realize in gas path module 2 gaseous tension stability contorting in the function of setting value.
The utility model arranges concrete dynamic modulus air-resistor structure 8 between proportional control valve 3 and gas outlet interface 7, and utilize concrete dynamic modulus air-resistor structure 8 constant gaseous tension to be converted to the module of constant rate output, its principle is Poiseuille equation.Concrete dynamic modulus air-resistor structure 8 can select metal powder metallurgy vapour lock, high alumina ceramic filter or honeycomb ceramic carrier.The utility model is to employ metal powder metallurgy device as vapour lock, and this vapour lock can do very little that (volume is several mm
3), can according to actual needs it be directly embedded in gas circuit; Meanwhile, because it adopts metal powder sinteredly thus to have concrete dynamic modulus character, a rough surface together, make it have the feature of difficult blocking, maintenance is few.
Gas path module 2 in the utility model is used for realizing gas circuit transmission, and its air intake opening place connects an air intake opening interface 1 be arranged vertically, and after input, side direction outputs to the entrance of proportional control valve 3 again; The outlet of proportional control valve 3 is input to the rear branch of gas path module 2 and exports, one tunnel exports Bonding pressure sensor 4, another road directly outputs to the input port of concrete dynamic modulus air-resistor structure 8, gas circuit requires carry out polishing, without obviously crude, the volume at the crossing dead angle of gas circuit is little as much as possible simultaneously, ensures that gas is stablized in the transmission of gas path module 2 with this.The selection of whole gas path module 2 needs to use lightweight to have the material of some strength, as cast aluminium, to alleviate the overall weight of flow-control module as much as possible;
Pressure transducer 4 in the utility model is used for realizing detecting the output pressure of gas path module 2, the pressure signal magnitude of voltage detected is passed to Control Component 5 by it, the difference of force value when pre-test and actual setpoint is calculated by Control Component 5, control by pid algorithm the electric current driving proportional control valve 3 again, reach the object of control inputs gas flow; Namely pressure transducer 4, Control Component 5 and proportional control valve 3 realize the stability contorting of gas path module 2 output gas pressure jointly.
Concrete dynamic modulus air-resistor structure 8 realizes going out to be converted to regime flow by stable pressure to export, and in the present embodiment, its installation form comprises a vapour lock pedestal 6, vapour lock air intake opening O type circle 10, vapour lock gas outlet O type circle 9; Concrete dynamic modulus air-resistor structure 8 is locked in vapour lock pedestal 6 by the O type circle of air intake opening and gas outlet, by gas outlet interface 7 and gas path module 2, the vapour lock pedestal 6 being fixed with concrete dynamic modulus air-resistor structure 8 and two O type circles is crimped on centre with screw again, makes gas can only flow out to outlet from the entrance of concrete dynamic modulus air-resistor structure 8.So mainly in order to prevent gas from the side flow of concrete dynamic modulus air-resistor structure 8, when occurring when vapour lock is installed rotating, the change of its vapour lock value size may be caused, the mounting means of this pair of O type circle, effectively can improve the consistance that gas flow control is above safeguarded in this pressure type flow rate control module dismounting.
The material that air intake opening interface 1 and gas outlet interface 7 all want working strength large makes, because gas circuit has stronger effect of stress when installing, used herein is stainless steel material, here just air intake opening and gas outlet use stainless steel material, carry out separating with gas path module 2, also be, the while of considering its physical strength of guarantee, make the weight of whole module light as much as possible.
As shown in Figure 5, in embody rule example, columniform concrete dynamic modulus air-resistor structure 8 can be adopted, also can adopt square concrete dynamic modulus air-resistor structure 8 as shown in Figure 6.
As shown in Figure 4, in the present embodiment, the pressure signal that pressure transducer 4 detects enters AD conversion unit 34(ADC after signal conditioning circuit 32 is nursed one's health) sample, the pressure signal of sampling is passed to data processing unit 35(MCU) middle process, the target setting value stored in this pressure signal and storer 36 contrasts by MCU, undertaken adjusting D/A conversion unit 33(DAC by the difference calculating itself and target set point) output, control ratio operation valve 3 is carried out with the output current size controlling constant-current drive circuit 31, the flow of its gas is flow through by proportional control valve 3 adjustment, the pressure signal detected to reach controlled pressure sensor 4 is stabilized in target set point, reach the object that the pressure stability in gas path module 2 controls.Data processing unit 35(MCU) carry out data interaction by external communication unit 37 with host computer or other equipment.
Below be only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, not departing from the some improvements and modifications under the utility model principle prerequisite, protection domain of the present utility model should be considered as.
Claims (5)
1. a pressure type flow amount controller, it is characterized in that, comprise gas path module (2), proportional control valve (3), pressure transducer (4) and Control Component (5), described gas path module (2) is connected with gas outlet interface (7) with air intake opening interface (1), the gas entered from described air intake opening interface (1) delivers to proportional control valve (3) after gas path module (2), is exported after the adjustment of described proportional control valve (3) by gas outlet interface (7); Concrete dynamic modulus air-resistor structure (8) is set between the output terminal and gas outlet interface (7) of described proportional control valve (3), by the hole in concrete dynamic modulus air-resistor structure (8), constant gaseous tension is converted to constant rate and exports.
2. pressure type flow amount controller according to claim 1, it is characterized in that, described concrete dynamic modulus air-resistor structure (8) is arranged in vapour lock pedestal (6), vapour lock air intake opening O type circle (10) is set at the entrance point of concrete dynamic modulus air-resistor structure (8), vapour lock gas outlet O type circle (9) is set at the endpiece of concrete dynamic modulus air-resistor structure (8).
3. pressure type flow amount controller according to claim 2, it is characterized in that, the output terminal of described proportional control valve (3) is connected with gas outlet interface (7) after gas path module (2), and described concrete dynamic modulus air-resistor structure (8) is connected between gas outlet interface (7) and gas path module (2) by securing member.
4. pressure type flow amount controller according to claim 2, is characterized in that, described concrete dynamic modulus air-resistor structure (8) is metal powder metallurgy vapour lock, high alumina ceramic filter or honeycomb ceramic carrier.
5. the pressure type flow amount controller according to claim 1 or 2 or 3 or 4, it is characterized in that, the air intake opening place of described gas path module (2) connects an air intake opening interface (1) be arranged vertically, and after gas input, side direction outputs to the entrance of proportional control valve (3) again; The outlet of described proportional control valve (3) is input to gas path module (2) branch's output afterwards, and a road exports Bonding pressure sensor (4), and another road directly outputs to the input port of concrete dynamic modulus air-resistor structure (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420490680.5U CN204101991U (en) | 2014-08-29 | 2014-08-29 | A kind of pressure type flow amount controller |
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| CN201420490680.5U CN204101991U (en) | 2014-08-29 | 2014-08-29 | A kind of pressure type flow amount controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105697338A (en) * | 2016-04-01 | 2016-06-22 | 奉化市鼎联汽车空压机厂 | Novel built-in oil expelling prevention piston structure |
| CN106853270A (en) * | 2015-12-09 | 2017-06-16 | 北京谊安医疗系统股份有限公司 | A kind of vapour lock for depressurizing |
-
2014
- 2014-08-29 CN CN201420490680.5U patent/CN204101991U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106853270A (en) * | 2015-12-09 | 2017-06-16 | 北京谊安医疗系统股份有限公司 | A kind of vapour lock for depressurizing |
| CN105697338A (en) * | 2016-04-01 | 2016-06-22 | 奉化市鼎联汽车空压机厂 | Novel built-in oil expelling prevention piston structure |
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