CN204373966U - A kind of sampling thief flow-control module - Google Patents
A kind of sampling thief flow-control module Download PDFInfo
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- CN204373966U CN204373966U CN201520063197.3U CN201520063197U CN204373966U CN 204373966 U CN204373966 U CN 204373966U CN 201520063197 U CN201520063197 U CN 201520063197U CN 204373966 U CN204373966 U CN 204373966U
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- control module
- sampling thief
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Abstract
The utility model proposes a kind of sampling thief flow-control module, comprise throttling element, pressure transducer, air pump and single-chip microcomputer.The pressure transducer pressure differential recorded before and after throttling element converts voltage signal to and is transferred to single-chip microcomputer, and single-chip microcomputer calculates actual flow, and sends control signal after contrasting with target flow to adjust air pump rotating speed, repeatedly reaches target flow value after adjustment.Throttling element, pressure transducer, air pump and single-chip microcomputer are integrated in the module of a small size by flow-control module described in the utility model, can well control flow.Miscellaneous part needed for this flow-control module and sampling thief is assembled and can be realized sampling thief, reduce sampling thief development difficulty, shorten the construction cycle, decrease the waste of overlapping development flow controller to resource, can be good at meeting environmental administration to demand that is multi-functional, multi-channel sampling device.
Description
Technical field
The utility model belongs to gas-monitoring, sampling field, particularly relates to a kind of sampling thief flow-control module.
Background technology
Current environment protection is state key, and environmental administration constantly proposes new demand to gas sampler.And each sampling thief technology of between current each producer or producer inside has different standards, not general mutually, the tempo of development of new product is difficult to satisfied new demand, is badly in need of a kind of modular sampling thief design proposal.The utility model produces just in this context.Although commercially also having some flowmeter product existing, is all simply calculate present flow rate, does not carry out other process, does not more have integrated flow-rate control section or delivery rate control signal.User still will spend a large amount of energy and time oneself to develop control section, still can not meet sampling thief and produces modular demand.
Utility model content
The utility model is produced for above-mentioned sampling thief, design standards is different, cannot the technical matters such as modularized production, a kind of flow-control module that can become various sampling thief with other parts Rapid Combination is proposed, this flow-control module can control flow accurately, as long as add the gas sampler of the various various combination of formation that necessary display and time controling just can be very fast, as sampling thiefs such as 2 tunnels of current popular, 3 tunnels, 4 roads and 8 tunnels, enterprise is facilitated to accelerate research and development and the speed of production of sampling thief.
In order to achieve the above object, the technical solution adopted in the utility model is:
A kind of sampling thief flow-control module, it is characterized in that: comprise throttling element, pressure transducer, air pump and single-chip microcomputer, the pressure transducer pressure differential recorded before and after throttling element converts voltage signal to and is transferred to single-chip microcomputer, single-chip microcomputer calculates actual flow, and send control signal after contrasting with target flow to adjust air pump rotating speed, finally reach adjustment flow, realize constant current object.
As preferably, cylinder and the orifice plate after being installed on part placket, part between cylinder after described throttling element comprises part placket, part; Described placket is provided with air intake opening and the front pressure tappings of meter, and after described, cylinder is provided with gas outlet and the rear pressure tappings of meter.
As preferably, after described placket, part, cylinder and orifice plate are fixedly connected with by sealant sealing and back-off.
As preferably, described throttling element side is provided with four holders.
As preferably, described throttling element opposite side is provided with two fixed mounts.
As preferably, described air pump is positioned at inside modules.
As preferably, described pressure transducer is SSDL 3AS 010DP type sensor.
Compared with prior art, advantage of the present utility model and good effect are:
Throttling element, pressure transducer, air pump and single-chip microcomputer are integrated in the module of a small size by flow-control module described in the utility model, can well control flow.Miscellaneous part needed for this flow-control module and sampling thief is assembled and can be realized commercialization, reduce sampling thief development difficulty, decrease the waste of overlapping development flow controller to resource, can be good at meeting that environmental administration is multi-functional to sampling thief, the demand of multichannel.The enterprise of such environmental protection industry (epi) can develop with the fastest speed meet environmental administration require sampling thief and be supplied to client use; The enterprise just having entered environmental protection industry (epi) also can be very fast the product of release oneself, save the time of human and material resources and preciousness the most.
Accompanying drawing explanation
Fig. 1 is the utility model flow-control module operation workflow figure;
Fig. 2 is the constructional appearance schematic diagram of throttling element described in the utility model;
Fig. 3 is the cut-open view of throttling element described in the utility model.
Above in each figure: 1, part placket; 11, air intake opening; 12, pressure tappings before meter; 2, orifice plate; 3, cylinder after part; 31, pressure tappings after meter; 32, gas outlet; 4, holder; 5, fixed mount.
Embodiment
In order to better understand the utility model, illustrate below in conjunction with drawings and Examples.
Embodiment: as shown in Figure 1, a kind of sampling thief flow-control module, it is characterized in that: comprise throttling element, pressure transducer, air pump and single-chip microcomputer, the pressure transducer pressure differential recorded before and after throttling element converts voltage signal to and is transferred to single-chip microcomputer, single-chip microcomputer calculates actual flow, and send control signal after contrasting with target flow to adjust air pump rotating speed, repeatedly reach target flow value after adjustment, realize constant current.Throttling element, pressure transducer, air pump and single-chip microcomputer are integrated in a module, and by the control of pressure detection and single-chip microcomputer, can well control flow, and module volume is little, applicability is wide.
As shown in Figure 2 and Figure 3, cylinder 3 and the orifice plate 2 after being installed on part placket, part between cylinder after throttling element comprises part placket 1, part; Described placket 1 is provided with air intake opening 11 and the front pressure tappings 12 of meter, and after described, cylinder 3 is provided with gas outlet 31 and the rear pressure tappings 32 of meter.
In order to seal throttling element, better control flow, after described placket 1, part, cylinder 3 and orifice plate 2 are fixedly connected with by sealant sealing and back-off.
Be provided with four holders 4 bottom throttling element, throttling element and miscellaneous part can better be fixed.Throttling element is also provided with two fixed mounts 5, for the miscellaneous part such as fixation of sensor, singlechip control panel.
Flow-control module described in the utility model is divided into power built-in and external two kinds of power, is respectively air pump and is positioned at inside modules and module-external, and the preferred air pump of the present embodiment is placed in inside modules makes structure compacter.
Pressure transducer is SSDL 3AS 010DP type sensor.Single-chip microcomputer is common known technology, and its principle of work repeats no more, and air pump needs to select according to uninterrupted, and the present embodiment selects MSP430F149 type single-chip microcomputer and 00H220H022(12V) type air pump.
During concrete use, pressure transducer to be connected before meter pressure tappings 32 after pressure tappings 12 and meter, air pump bleeding point connects throttling element gas outlet, and single-chip microcomputer accepts the signal of pressure transducer transmission and controls the rotating speed of air pump.First target setting flow, air pump starts, gas enters throttling element by air intake opening 11 under the swabbing action of air pump, by orifice plate 2, draught head is produced before and after throttling element, this force value is converted to digital signal by pressure transducer, send MSP430F149 single-chip microcomputer again to, current actual flow value is calculated according to the relation of pressure and flow by single-chip microcomputer, again this flow value and setting throughput ratio comparatively, go out the new rotating speed of aspiration pump by PID program computation, then reach this rotating speed by Single-chip Controlling aspiration pump.Controlled by repeated detection, actual flow is all stabilized on setting flow all the time.Such as: target setting flow 1L/min, before and after corresponding throttling element, pressure differential is 1000Pa, and single-chip microcomputer constantly can detect the pressure differential before and after throttling element, and constantly the rotating speed of adjustment aspiration pump, makes pressure differential before and after throttling element maintain 1000Pa.
The above; it is only preferred embodiment of the present utility model; it is not restriction the utility model being made to other form; the Equivalent embodiments that any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as equivalent variations is applied to other field; but everyly do not depart from technical solutions of the utility model content; according to any simple modification, equivalent variations and remodeling that technical spirit of the present utility model is done above embodiment, still belong to the protection domain of technical solutions of the utility model.
Claims (7)
1. a sampling thief flow-control module, it is characterized in that: comprise the throttling element, pressure transducer, single-chip microcomputer and the air pump that connect successively, the pressure transducer pressure differential recorded before and after throttling element converts voltage signal to and is transferred to single-chip microcomputer, single-chip microcomputer calculates actual flow, and sends control signal after contrasting with target flow to adjust air pump rotating speed.
2. a kind of sampling thief flow-control module according to claim 1, is characterized in that: cylinder and the orifice plate after being installed on part placket, part between cylinder after described throttling element comprises part placket, part; Described placket is provided with air intake opening and the front pressure tappings of meter, and after described, cylinder is provided with gas outlet and the rear pressure tappings of meter.
3. a kind of sampling thief flow-control module according to claim 2, is characterized in that: after described placket, part, cylinder and orifice plate are fixedly connected with by fluid sealant.
4. a kind of sampling thief flow-control module according to Claims 2 or 3, is characterized in that: described throttling element side is provided with four holders.
5. a kind of sampling thief flow-control module according to claim 4, is characterized in that: described throttling element opposite side is provided with two fixed mounts.
6. a kind of sampling thief flow-control module according to claim 5, is characterized in that: described air pump is positioned at flow-control module inside.
7. a kind of sampling thief flow-control module according to claim 5, is characterized in that: described pressure transducer is SSDL 3AS 010DP type sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520063197.3U CN204373966U (en) | 2014-09-19 | 2015-01-29 | A kind of sampling thief flow-control module |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420540158 | 2014-09-19 | ||
| CN2014205401583 | 2014-09-19 | ||
| CN201520063197.3U CN204373966U (en) | 2014-09-19 | 2015-01-29 | A kind of sampling thief flow-control module |
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| Publication Number | Publication Date |
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| CN204373966U true CN204373966U (en) | 2015-06-03 |
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| CN201520063197.3U Active CN204373966U (en) | 2014-09-19 | 2015-01-29 | A kind of sampling thief flow-control module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784429A (en) * | 2016-03-25 | 2016-07-20 | 中国地质大学（武汉） | Passive air sampler |
| CN112697976A (en) * | 2020-12-18 | 2021-04-23 | 汉威科技集团股份有限公司 | Gas path flow real-time dynamic adjusting method, system and storage medium |
-
2015
- 2015-01-29 CN CN201520063197.3U patent/CN204373966U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784429A (en) * | 2016-03-25 | 2016-07-20 | 中国地质大学（武汉） | Passive air sampler |
| CN112697976A (en) * | 2020-12-18 | 2021-04-23 | 汉威科技集团股份有限公司 | Gas path flow real-time dynamic adjusting method, system and storage medium |
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| GR01 | Patent grant |