CN202383049U - Miniature negative pressure device - Google Patents
Miniature negative pressure device Download PDFInfo
- Publication number
- CN202383049U CN202383049U CN2011205503244U CN201120550324U CN202383049U CN 202383049 U CN202383049 U CN 202383049U CN 2011205503244 U CN2011205503244 U CN 2011205503244U CN 201120550324 U CN201120550324 U CN 201120550324U CN 202383049 U CN202383049 U CN 202383049U
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- CN
- China
- Prior art keywords
- negative pressure
- piston
- solenoid valve
- cavity
- pipeline
- Prior art date
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- Expired - Lifetime
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Abstract
The utility model discloses a miniature negative pressure device, which comprises a negative pressure generation mechanism and a negative pressure detection control mechanism. The negative pressure generation mechanism comprises a stepper motor, a screw rod, a piston, a chamber and pipelines, wherein one end of the screw rod is connected with the stepper motor through a bearing, and the other end of the screw rod is connected with the piston; the piston is matched with an inner cavity of the chamber; an O-shaped sealing ring is arranged at the upper end of the chamber; and an exhaust pipeline and a negative pressure pipeline are connected to the lower end of the chamber. The detection control mechanism consists of a negative pressure sensor, a first on-off solenoid valve and a second on-off solenoid, which are connected, wherein the negative pressure sensor and the first on-off solenoid valve are sequentially connected to the negative pressure pipeline; the second on-off solenoid valve is connected to the exhaust pipeline; the lower end of the exhaust pipeline is communicated with air; and the tail end of the negative pressure pipeline is connected with a part for which negative pressure is required to be provided. The negative pressure is generated by the movement of the piston; and the device is simple in structure, low in cost and easy to implement.
Description
Technical field
The utility model relates to a kind of negative pressure device.
Background technology
Need negative pressure during blood analyser pair cell counting, cell is through the jewel hole under the attraction of negative pressure, and two ends, jewel hole CC is counted through the number of cells pair cell in jewel hole through detecting.Negative pressure during the blood analyser counting need be in certain area requirement, and blood analyser adopts compressor that needed negative pressure is provided more usually, but compressor arrangement is complicated, and volume is big, and cost is high.
Summary of the invention
The utility model technical matters to be solved provides a kind of simple and practical small-sized negative pressure device.
For solving this technical matters, the utility model provides a kind of small-sized negative pressure device, comprises the negative pressure recurring structure, also comprises the detection of negative pressure control gear.
Said negative pressure generating mechanism comprises stepper motor, leading screw, piston, cavity and pipeline; Said leading screw one end is connected with stepper motor through bearing; The other end is connected with piston; Said piston cooperates with the inner chamber of cavity, is provided with sealing O shape circle in the upper end of cavity, and the lower end of this cavity is connected with gas exhaust duct and negative-pressure pipeline.
Said detection control gear is connected and composed with pipeline by negative pressure transducer, break-make solenoid valve one and break-make solenoid valve two, is connected with negative pressure inductor and break-make solenoid valve one on the said negative-pressure pipeline in turn, is connected with break-make solenoid valve two on the gas exhaust duct.
Said gas exhaust duct lower channel blowing air, the terminal connection of negative-pressure pipeline need provide the parts of negative pressure.
Said piston and cavity are syringe piston and syringe cavity.
Beneficial effect: the utility model relies on piston motion to produce negative pressure, and simple in structure, cost is low, and is easy to realize.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1 stepper motor, 2 bearings, 3 screw mandrels, 4 syringe pistons, 5O type circle, 6 syringe cavitys, 7 negative pressure transducers, 8 break-make solenoid valves one, 9 break-make solenoid valves two, 10 gas exhaust ducts, 11 negative-pressure pipelines.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done specific descriptions.
Shown in Figure 1 is the structural representation of the utility model.
The utility model comprises the negative pressure recurring structure, also comprises the detection of negative pressure control gear.
Said negative pressure generating mechanism comprises stepper motor 1, leading screw 3, piston 4, cavity 6 and negative-pressure pipeline 11 and gas exhaust duct 10.
Said leading screw 3 one ends are connected with stepper motor 1 through bearing 2, and the other end is connected with piston 4, and said piston 4 cooperates with the inner chamber of cavity 6, are provided with sealing O shape circle 2 in the upper end of cavity 6.
The lower end of said cavity 6 is connected with gas exhaust duct 10 and negative-pressure pipeline 11.
Said detection control gear is connected and composed with pipeline by negative pressure transducer 7, break-make solenoid valve 1 and break-make solenoid valve 29.
Be connected with negative pressure inductor 7 and break-make solenoid valve 1 on the said negative-pressure pipeline 11 in turn, be connected with break-make solenoid valve 29 on the gas exhaust duct 10.
Said gas exhaust duct 10 lower channel blowing airs, negative-pressure pipeline 11 terminal connections need provide the parts of negative pressure.
Said piston 4 is syringe piston and syringe cavity with cavity 6.
Piston and cavity with syringe is the principle of work that embodiment explains the utility model below:
When syringe piston 4 moves from lower to upper; Break-make solenoid valve 1 cuts out with break-make solenoid valve 29; Produce negative pressure in the syringe cavity 6; After negative pressure transducer 7 induction negative pressure reach the regulation requirement, syringe piston 4 stop motions, break-make solenoid valve 1 is opened negative pressure to the parts that need negative pressure is provided at this moment.
Sense negative pressure when negative pressure transducer 7 and be lower than following the prescribing a time limit that instrument is set, negative pressure need be provided again, break-make solenoid valve 29 is opened at this moment; Break-make solenoid valve 1 cuts out; Syringe piston 4 relies on stepper motor to move downward the bottom earlier, and break-make solenoid valve 29 cuts out then, and piston moves upward; Stop motion when pressure reaches the regulation requirement, at this moment break-make solenoid valve 1 is opened can be needed the parts of negative pressure that negative pressure is provided once more.
The utility model relies on piston motion to produce negative pressure, and simple in structure, cost is low, and is easy to realize.
The utility model can realize that above-mentioned embodiment just illustrates through necessary embodiment of not breaking away from of other, is not only, all in the utility model scope or the change that is equal in the scope of the utility model all surrounded by the utility model.
Claims (3)
1. a small-sized negative pressure device comprises the negative pressure recurring structure, it is characterized in that: also comprise the detection of negative pressure control gear,
Said negative pressure generating mechanism comprises stepper motor (1), leading screw (3), piston (4) and cavity (6); Said leading screw (3) one ends are connected with stepper motor (1) through bearing (2); The other end is connected with piston (4); Said piston (4) cooperates with the inner chamber of cavity (6), is provided with sealing O shape circle (5) in the upper end of cavity (6), and the lower end of this cavity (6) is connected with negative-pressure pipeline (11) and gas exhaust duct (10);
Said detection control gear is connected and composed with pipeline by negative pressure transducer (7), break-make solenoid valve one (8) and break-make solenoid valve two (9); Be connected with negative pressure inductor (7) and break-make solenoid valve one (8) on the said negative-pressure pipeline (11) in turn, be connected with break-make solenoid valve two (9) on the gas exhaust duct (10).
2. small-sized negative pressure device according to claim 1 is characterized in that: said gas exhaust duct (10) lower channel blowing air, the terminal connection of negative-pressure pipeline (11) need provide the parts of negative pressure.
3. small-sized negative pressure device according to claim 1 and 2 is characterized in that: said piston (4) and cavity (5) are syringe piston and syringe cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205503244U CN202383049U (en) | 2011-12-26 | 2011-12-26 | Miniature negative pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205503244U CN202383049U (en) | 2011-12-26 | 2011-12-26 | Miniature negative pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383049U true CN202383049U (en) | 2012-08-15 |
Family
ID=46631544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205503244U Expired - Lifetime CN202383049U (en) | 2011-12-26 | 2011-12-26 | Miniature negative pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494985A (en) * | 2011-12-26 | 2012-06-13 | 山东兰桥医学科技有限公司 | Small negative pressure apparatus |
-
2011
- 2011-12-26 CN CN2011205503244U patent/CN202383049U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494985A (en) * | 2011-12-26 | 2012-06-13 | 山东兰桥医学科技有限公司 | Small negative pressure apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |