CN213684460U - Volume-variable piezoelectric pump - Google Patents
Volume-variable piezoelectric pump Download PDFInfo
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- CN213684460U CN213684460U CN202022329525.3U CN202022329525U CN213684460U CN 213684460 U CN213684460 U CN 213684460U CN 202022329525 U CN202022329525 U CN 202022329525U CN 213684460 U CN213684460 U CN 213684460U
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Abstract
The utility model discloses a variable volume piezoelectric pump, belonging to an electrical appliance device; aims to provide a piezoelectric pump which is convenient for disassembly and replacement of parts. The piezoelectric pump comprises an inlet flow channel and an outlet flow channel which are arranged on a pump body and are respectively communicated with a pump cavity, one-way valves positioned in the two flow channels, and a piezoelectric vibrator fixed on the pump body; the inlet check valve in the inlet flow passage (12) is composed of a first piston (10) fixed in the inlet flow passage through external threads and a first umbrella-shaped valve (11) arranged at the top of the first piston; the one-way valve in the outlet flow passage (4) is composed of a second piston (8) fixed in the outlet flow passage through external threads and a second umbrella-shaped valve (7) which is arranged on the inner top of the second piston in an inverted mode; the tops of the two pistons are provided with a plurality of through holes (5) communicated with the inner cavities of the pistons. The utility model discloses accessible adjusting piston's position comes the control flow, has installation easy maintenance, use cost low grade advantage, is a piezoelectric pump improves structure.
Description
Technical Field
The utility model relates to a piezoelectric pump, in particular to a variable volume piezoelectric pump; belongs to the technical field of electrical appliances.
Background
The piezoelectric pump is an electrical device which utilizes the piezoelectric effect to cause a piezoelectric vibrator to deform so as to cause the volume of a pump cavity to change to realize fluid output; usually consisting of a piezoelectric vibrator, a pump valve and a pump body. The working principle is that when an alternating current power supply is applied to two ends of the piezoelectric vibrator, the piezoelectric ceramic piece generates tensile or compressive stress under the action of an electric field, so that the piezoelectric vibrator generates bending deformation. When the piezoelectric ceramic plate is bent in the positive direction, the volume of a pump cavity is increased, the pressure of fluid in the cavity is reduced, a pump valve at an inlet is opened, a pump valve at an outlet is closed, and the fluid enters the pump cavity; when the piezoelectric ceramic plate is reversely bent, the volume of the pump cavity is reduced, the pressure of fluid in the cavity is increased, the pump valve at the inlet is closed, the pump valve at the outlet is opened, and the fluid in the cavity is extruded and discharged to form continuous and smooth directional flow.
The volume of the pump cavity of the existing piezoelectric pump is fixed and unchanged, and the change of the flow rate can be realized only by adjusting the voltage. In addition, the piston of the piezoelectric pump and the pump body adopt a non-detachable fixed connection mode; not only is the assembly troublesome, but also the damage of certain spare part among them directly leads to whole piezoelectric pump to scrap, causes the waste.
Disclosure of Invention
To the above-mentioned defect that exists among the prior art, the utility model aims at providing a make things convenient for spare part to dismantle variable volume piezoelectric pump of changing.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the piezoelectric vibrator comprises a pump body with a concave pump cavity, an inlet flow channel and an outlet flow channel which are arranged on the pump body and are respectively communicated with the pump cavity, one-way valves respectively positioned in the two flow channels, and a piezoelectric vibrator which is fixed on the pump body and seals the pump cavity, wherein both the inlet flow channel and the outlet flow channel are screw holes; the inlet check valve in the inlet flow passage consists of a first piston which is fixed in the inlet flow passage through external threads and is in a shape of a reversed bottle, and a first umbrella-shaped valve which is arranged at the top of the first piston; the one-way valve in the outlet flow passage consists of a second piston which is fixed in the outlet flow passage through external threads and is in a shape of a reversed bottle, and a second umbrella-shaped valve which is arranged on the inner top of the second piston in a reversed way; the tops of the two pistons are provided with a plurality of through holes communicated with the inner cavities of the pistons.
The bottoms of the first piston and the second piston are respectively provided with a port communicated with the inner cavity of the piston; the bottom of the pump cavity is provided with a communicating groove which communicates the inlet flow passage with the outlet flow passage; a sealing ring is arranged between the piezoelectric vibrator and the pump body; the piezoelectric ceramic piece of the piezoelectric vibrator is one of a single-sided piezoelectric ceramic piece, a double-sided piezoelectric ceramic piece and a laminated piezoelectric ceramic piece.
Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:
1) the pump body is in threaded connection with the piston, so that the flow can be controlled by adjusting the voltage and the position of the piston.
2) The adoption of the detachable piston is also convenient for the installation, maintenance and replacement of the umbrella-shaped valve, and the maintenance and use cost of the piezoelectric pump is reduced.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
In the figure: the piezoelectric vibrator comprises a piezoelectric vibrator 1, a pump cavity 2, a communicating groove 3, an outlet flow channel 4, a through hole 5, a pump body 6, a second umbrella-shaped valve 7, a second piston 8, a connector 9, a first piston 10, a first umbrella-shaped valve 11, an inlet flow channel 12 and a sealing ring 13.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1: the top of the pump body 6 is provided with a concave pump cavity 2 which is sealed by a piezoelectric vibrator 1 fixed on the pump body 6; the bottom of the pump body 6 is provided with an inlet flow passage 12 and an outlet flow passage 4 which are communicated with the pump cavity 2, and the two flow passages are both screw holes. An inlet check valve is arranged in the inlet flow passage 12 through threads, and the inlet check valve consists of a first piston 10 which is provided with external threads and has a reversed bottle-shaped structure and a first umbrella-shaped valve 11 which is arranged at the top of the first piston; an outlet one-way valve is arranged in the outlet flow passage 4 through threads, and the outlet one-way valve consists of a second piston 8 which is provided with external threads and has a reversed bottle-shaped structure and a second umbrella-shaped valve 7 which is arranged at the inner top of the second piston in a reversed way; the tops of the two pistons are provided with a plurality of through holes 5 communicated with the inner cavities of the pistons.
For convenience of use, the bottom of the first piston 10 and the second piston 8 are each provided with a port 9 communicating with the piston cavity and for connecting a pipe.
In order to allow the fluid in the inlet flow passage 12 to smoothly flow into the outlet flow passage 4, a communication groove 3 for communicating the inlet flow passage 12 with the outlet flow passage 4 is formed in the bottom of the pump chamber 2.
In order to improve the sealing performance, a seal ring 13 is attached between the piezoelectric vibrator 1 and the pump body 6.
In order to further adjust the flow according to the actual needs, the piezoelectric ceramic sheet of the piezoelectric vibrator 1 can adopt a single-sided piezoelectric ceramic sheet, a double-sided piezoelectric ceramic sheet or a laminated piezoelectric ceramic sheet.
Claims (5)
1. A variable volume piezoelectric pump comprises a pump body with a concave pump cavity, an inlet channel and an outlet channel which are arranged on the pump body and are respectively communicated with the pump cavity, one-way valves respectively positioned in the two channels, and a piezoelectric vibrator fixed on the pump body and sealing the pump cavity; the method is characterized in that: the inlet flow passage (12) and the outlet flow passage (4) are both screw holes; the inlet one-way valve in the inlet flow channel (12) is composed of a first piston (10) which is fixed in the inlet flow channel through external threads and is in a shape of a reversed bottle, and a first umbrella-shaped valve (11) which is arranged at the top of the first piston; the one-way valve in the outlet flow passage (4) consists of a second piston (8) which is fixed in the outlet flow passage through external threads and is in a shape of a reversed bottle, and a second umbrella-shaped valve (7) which is arranged on the inner top of the second piston in an inverted manner; the tops of the two pistons are provided with a plurality of through holes (5) communicated with the inner cavities of the pistons.
2. A variable volume piezoelectric pump according to claim 1, wherein: the bottoms of the first piston (10) and the second piston (8) are provided with interfaces (9) communicated with the inner cavities of the pistons.
3. A variable volume piezoelectric pump according to claim 1 or 2, wherein: a communicating groove (3) for communicating the inlet flow passage (12) and the outlet flow passage (4) is provided at the bottom of the pump chamber (2).
4. A variable volume piezoelectric pump according to claim 1 or 2, wherein: a seal ring (13) is arranged between the piezoelectric vibrator (1) and the pump body (6).
5. A variable volume piezoelectric pump according to claim 1 or 2, wherein: the piezoelectric ceramic piece of the piezoelectric vibrator (1) is one of a single-sided piezoelectric ceramic piece, a double-sided piezoelectric ceramic piece and a laminated piezoelectric ceramic piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022329525.3U CN213684460U (en) | 2020-10-19 | 2020-10-19 | Volume-variable piezoelectric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022329525.3U CN213684460U (en) | 2020-10-19 | 2020-10-19 | Volume-variable piezoelectric pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213684460U true CN213684460U (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022329525.3U Active CN213684460U (en) | 2020-10-19 | 2020-10-19 | Volume-variable piezoelectric pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN213684460U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278556A (en) * | 2021-12-31 | 2022-04-05 | 上海飞科电器股份有限公司 | Water pumping device and tooth flushing device |
-
2020
- 2020-10-19 CN CN202022329525.3U patent/CN213684460U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278556A (en) * | 2021-12-31 | 2022-04-05 | 上海飞科电器股份有限公司 | Water pumping device and tooth flushing device |
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