CN204856230U - Accurate controlling means that continuous small flow flows - Google Patents
Accurate controlling means that continuous small flow flows Download PDFInfo
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- CN204856230U CN204856230U CN201520568270.2U CN201520568270U CN204856230U CN 204856230 U CN204856230 U CN 204856230U CN 201520568270 U CN201520568270 U CN 201520568270U CN 204856230 U CN204856230 U CN 204856230U
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Abstract
The utility model relates to an accurate controlling means that continuous small flow flows, including the airtight water tank body, the higher authority of the airtight water tank body is equipped with the inlet tube of bringing the water valve into and takes the blast pipe of air bleeding valve, and the bottom surface of the airtight water tank body is equipped with the outlet pipe of carring over the water valve out of, the bottom surface of the airtight water tank body still be equipped with extension retaining portion down, extension retaining portion and airtight water tank body intercommunication, the airtight water tank body on still insert and be equipped with the intake air modulation pipe, the bottom entry of intake air modulation pipe extend retaining portion. The utility model discloses not only can the continuous small flow stream of accurate control, the degree of accuracy that improves the experimental data, the cost is low in addition, the sexual valence relative altitude.
Description
Technical field
The utility model belongs to flow regulation field, particularly a kind of precise control device of continuous tiny flow quantity stream.
Background technology
In production practices, the difficult problem that simple and reliable control is puzzlement laboratory technicians is always realized to tiny flow quantity, existing method is generally by peristaltic pump, volume pump or adopts delicate flow meter and the chain control of variable valve to realize, although these schemes can control tiny flow quantity, there is following problem:
Peristaltic pump is that the roller bearing by rotating makes sebific duct wriggling carry liquid, speed by regulating roller bearing to rotate realizes the control to flow, the accuracy of measuring is not high, go out stream and need artificial demarcation, and sebific duct is by the process that repeatedly extrudes, easy appearance is aging, the situation of deformation and damage, and metering is accurately unstable, and the cost of peristaltic pump is higher;
Volume pump cost is high, but volume pump generation is pulse flow, and dielectric viscosity can make non-return valve bead not reset in time, occurs degree reflux in various degree;
Delicate flow meter and the chain control of variable valve are the practices well in engineering, its control minimum flow time, the precision of flowmeter and the operation precision of variable valve not high;
In sum, its major defect of the solution of existing tiny flow quantity is that expense has high input, and measuring accuracy is forbidden, and causes experimental data misalignment.
Summary of the invention
The technical problems to be solved in the utility model is for the deficiencies in the prior art, propose a kind of precise control device of continuous tiny flow quantity stream, this precise control device accurately can not only control continuous tiny flow quantity stream, improves the accuracy of experimental data, and cost is low, cost performance is high.
The technical problems to be solved in the utility model is achieved through the following technical solutions.The utility model is a kind of precise control device of continuous tiny flow quantity stream, its feature is: comprise airtight water tank body, the water inlet pipe being provided with band water intaking valve above of airtight water tank body and the gas outlet of band vent valve, the bottom surface of airtight water tank body is provided with the rising pipe of band outlet valve, the bottom surface of described airtight water tank body is also provided with extension storage part down, described extension storage part is communicated with airtight water tank body, described airtight water tank body is also inserted with air inlet adjustment pipe, the lower end of described air inlet adjustment pipe is inserted and is extended storage part, air inlet adjustment pipe and casing junction seal.
In the precise control device technical scheme of a kind of continuous tiny flow quantity stream of the utility model, preferred technical scheme feature is further: the outside of described airtight water tank body is provided with liquid level tube, and the lower end of described liquid level tube is communicated with the bottom of airtight water tank body.
In the precise control device technical scheme of a kind of continuous tiny flow quantity stream of the utility model, preferred technical scheme feature is further: described liquid level tube is provided with operation valve.
In the precise control device technical scheme of a kind of continuous tiny flow quantity stream of the utility model, preferred technical scheme feature is further: be provided with liquid level sensor near end face place in described airtight water tank body, described water intaking valve is entering water electromagnetic valve, described vent valve is electromagnetic gas valve, and described upper liquid level sensor, entering water electromagnetic valve are connected PLC with electromagnetic gas valve.
In the precise control device technical scheme of a kind of continuous tiny flow quantity stream of the utility model, preferred technical scheme feature is further: be provided with lower liquid level sensor near bottom surface place in described airtight water tank body, described outlet valve for going out water solenoid valve, described lower liquid level sensor with go out water solenoid valve be connected described in PLC.
In the precise control device technical scheme of a kind of continuous tiny flow quantity stream of the utility model, preferred technical scheme feature is further: the bottom surface of described extension storage part is provided with the drainpipe of band draining valve.
Compared with prior art, the utility model has following technique effect:
(1) gas outlet of the utility model by adjustment air inlet adjustment pipe and the difference in height of rising pipe, the maintain constant pressure of the arbitrary surface level in airtight water tank body can be made, produce a constant continuous flow, control precisely, improve the accuracy of experimental data, and structure is simple, cost is low, easy to operate, reliability is strong;
(2) device highly versatile of the present utility model, accessible site is applicable in other flow control systems;
(3) product of the present invention overcomes the dependence to pump and flowmeter, and low cost of manufacture, cost performance is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Referring to accompanying drawing, further describe concrete technical scheme of the present utility model, so that those skilled in the art understands the utility model further, and do not form the restriction of its power.
Embodiment 1, with reference to Fig. 1, a kind of precise control device of continuous tiny flow quantity stream, comprise airtight water tank body 1, the water inlet pipe 3 being provided with band water intaking valve 31 above of airtight water tank body 1 and the gas outlet 4 of band vent valve 41, the bottom surface of airtight water tank body 1 is provided with the rising pipe 10 of band outlet valve 11, the bottom surface of described airtight water tank body 1 is also provided with extension storage part 8 down, described extension storage part 8 is communicated with airtight water tank body 1, described airtight water tank body 1 is also inserted with air inlet adjustment pipe 5, the lower end of described air inlet adjustment pipe 5 is inserted and is extended storage part 8, air inlet adjustment pipe 5 seals with the junction O-ring seal 6 of casing.
Embodiment 2, in the precise control device of the continuous tiny flow quantity stream described in embodiment 1: the outside of described airtight water tank body 1 is provided with liquid level tube 7, the lower end of described liquid level tube 7 is communicated with the bottom of airtight water tank body 1, and described liquid level tube 7 is provided with operation valve 71.
Embodiment 3, in the precise control device of embodiment 1 or the continuous tiny flow quantity stream described in embodiment 2: be provided with liquid level sensor 2 near end face place in described airtight water tank body 1, described water intaking valve 31 is entering water electromagnetic valve, described vent valve 41 is electromagnetic gas valve, and described upper liquid level sensor 2, entering water electromagnetic valve are connected PLC with electromagnetic gas valve.
Embodiment 4, in the precise control device of the continuous tiny flow quantity stream described in embodiment 1-3: be provided with lower liquid level sensor 12 near bottom surface place in described airtight water tank body 1, described outlet valve 11 for going out water solenoid valve, described lower liquid level sensor 12 with go out water solenoid valve be connected described in PLC.
Embodiment 5, in the precise control device of the continuous tiny flow quantity stream described in embodiment 1-4: the bottom surface of described extension storage part 8 is provided with the drainpipe 9 of band draining valve 91.
The course of work of the present utility model:
(1) moisturizing operation, water intaking valve is opened, and water enters in airtight water tank body from water inlet pipe, and the air of airtight water tank body is discharged through gas outlet simultaneously;
(2) when airtight water tank body add fill time, in triggering, liquid level sensor is by Signal transmissions to PLC, and PLC controls water intaking valve and exhaust valve closure, and system enters stand-by state;
(3) then PLC controls outlet valve unlatching, and the medium in water tank is flowed out by rising pipe, and gas enters airtight water tank body through air inlet adjustment pipe simultaneously;
(4) in the liquid level decline process in airtight water tank body, keep atmospheric pressure constant with the end opening of air inlet adjustment pipe at the surface level of sustained height, thus realize evenly going out stream;
(5) when water level is reduced to lowest working water level, trigger lower liquid level sensor by Signal transmissions to PLC, PLC closes outlet valve, then opens water intaking valve and vent valve, again gets back to moisturizing operation.
Certainly, the water intaking valve in the utility model, vent valve and outlet valve can adopt the valve of Non-follow control.
The air inlet air inlet adjustment pipe that the utility model utilizes airtight water tank body and one to be inserted in below liquid level makes the maintain constant pressure of the water surface of arbitrary height in water tank, the pressure of certain surface level of airtight water tank body is only relevant with the difference in height of the air intake opening of air inlet adjustment pipe with this surface level, and have nothing to do with the total liquid level in airtight water tank body, even if because continuous water outlet makes the water surface in water tank constantly reduce, by the automatic inflating device of air inlet adjustment pipe, the situation of the maintain constant pressure of this arbitrary surface level can not change all the time, the difference in height △ h of the gas outlet of effluent pipe mouth and air inlet adjustment pipe lower end, setting out waterpipe resistance coefficient is that S(is for a certain pipeline determined, S is definite value), a constant continuous flow Q=△ h0.5/S0.5 will be produced, and △ h is relevant with the height of effluent pipe mouth with the insertion depth of air inlet adjustment pipe, therefore by regulating △ h can reach the object accurately controlling continuous tiny flow quantity.
Claims (6)
1. the precise control device of a continuous tiny flow quantity stream, it is characterized in that: comprise airtight water tank body, the water inlet pipe being provided with band water intaking valve above of airtight water tank body and the gas outlet of band vent valve, the bottom surface of airtight water tank body is provided with the rising pipe of band outlet valve, the bottom surface of described airtight water tank body is also provided with extension storage part down, described extension storage part is communicated with airtight water tank body, described airtight water tank body is also inserted with air inlet adjustment pipe, the lower end of described air inlet adjustment pipe is inserted and is extended storage part, and air inlet adjustment pipe and casing junction seal.
2. the precise control device of continuous tiny flow quantity stream according to claim 1, it is characterized in that: the outside of described airtight water tank body is provided with liquid level tube, the lower end of described liquid level tube is communicated with the bottom of airtight water tank body.
3. the precise control device of continuous tiny flow quantity stream according to claim 2, is characterized in that: described liquid level tube is provided with operation valve.
4. the precise control device of continuous tiny flow quantity stream according to claim 1, it is characterized in that: in described airtight water tank body, be provided with liquid level sensor near end face place, described water intaking valve is entering water electromagnetic valve, described vent valve is electromagnetic gas valve, and described upper liquid level sensor, entering water electromagnetic valve are connected PLC with electromagnetic gas valve.
5. the precise control device of continuous tiny flow quantity stream according to claim 4, it is characterized in that: in described airtight water tank body, be provided with lower liquid level sensor near bottom surface place, described outlet valve for going out water solenoid valve, described lower liquid level sensor with go out water solenoid valve be connected described in PLC.
6. the precise control device of the continuous tiny flow quantity stream according to any one of claim 1-5, is characterized in that: the bottom surface of described extension storage part is provided with the drainpipe of band draining valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568270.2U CN204856230U (en) | 2015-07-31 | 2015-07-31 | Accurate controlling means that continuous small flow flows |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520568270.2U CN204856230U (en) | 2015-07-31 | 2015-07-31 | Accurate controlling means that continuous small flow flows |
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| Publication Number | Publication Date |
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| CN204856230U true CN204856230U (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520568270.2U Active CN204856230U (en) | 2015-07-31 | 2015-07-31 | Accurate controlling means that continuous small flow flows |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112835390A (en) * | 2021-03-03 | 2021-05-25 | 中航工业南航（深圳）测控技术有限公司 | High-resolution micropressure flow state pressure regulating device |
-
2015
- 2015-07-31 CN CN201520568270.2U patent/CN204856230U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112835390A (en) * | 2021-03-03 | 2021-05-25 | 中航工业南航（深圳）测控技术有限公司 | High-resolution micropressure flow state pressure regulating device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 222000 Court Dormitory 101-1, Majun District, Xincheng Street, Haizhou District, Lianyungang City, Jiangsu Province Patentee after: Jiangsu Dafa Environmental Protection Technology Co., Ltd. Address before: 222000 Court Dormitory 101-1, Majun District, Xincheng Street, Haizhou District, Lianyungang City, Jiangsu Province Patentee before: LIANYUNGANG DAFA ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |