CN217815173U - Air inlet valve for high-negative-pressure micro diaphragm pump - Google Patents
Air inlet valve for high-negative-pressure micro diaphragm pump Download PDFInfo
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- CN217815173U CN217815173U CN202221971511.4U CN202221971511U CN217815173U CN 217815173 U CN217815173 U CN 217815173U CN 202221971511 U CN202221971511 U CN 202221971511U CN 217815173 U CN217815173 U CN 217815173U
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- air inlet
- valve
- valve seat
- diaphragm pump
- negative pressure
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Abstract
The utility model discloses an air inlet valve for a high negative pressure micro diaphragm pump, wherein an air inlet cavity is arranged in a pump body, and the air inlet cavity is not only used for communicating an air inlet nozzle with a pump cavity, but also used for installing the air inlet valve; the air inlet valve comprises a valve seat and a valve core; an installation step is arranged in the air inlet cavity, and the valve seat is installed on the installation step; the valve seat is connected with the air inlet cavity in a sealing mode, one side of the valve seat is provided with a notch used for ventilation, and the other side of the valve seat is provided with a plurality of small ventilation holes used for balancing air flow; the side edge of the valve seat is also provided with an installation part for fixing the valve seat, and the middle part of the valve seat is provided with an installation hole; the valve core comprises a valve rod and a sealing sheet, and the sealing sheet is fixed at the end part of the valve rod; the valve rod is fixedly connected in the mounting hole, and the sealing sheet is contacted with the bottom surface of the air inlet cavity and blocks the outlet of the air inlet nozzle; the back of the sealing sheet is provided with a filling ring; the sealing sheet and the filling ring are made of elastic materials; compact structure, installation of being convenient for can be accomplished through this kind of design, promote the negative pressure of breathing in of diaphragm pump simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the diaphragm pump, specifically be an admission valve for miniature diaphragm pump of high negative pressure.
Background
The miniature diaphragm pump is a miniature volumetric pump, and a pump body of the miniature volumetric pump is provided with an air suction mouth for air inlet and an exhaust nozzle for air outlet. A diaphragm (a leather cup) is arranged in the pump body and is driven by a connecting rod mechanism to reciprocate, so that the space of a pump cavity of the pump body is continuously changed, vacuum or negative pressure can be continuously formed at the air inlet nozzle, and micro-positive pressure is formed at the air outlet nozzle; the miniature diaphragm pump can realize continuous gas or liquid conveying, and is small in size and reliable in performance.
In order to achieve high negative pressure, the micro diaphragm pump needs to reduce the useless volume of a pump cavity as much as possible and improve the sealing performance of a one-way valve; in order to achieve high tightness, a one-way valve structure with a complex structure must be used, and in the prior art, in order to ensure that internal parts are not rubbed and bumped and the one-way valve is convenient to install, the micro diaphragm pump is difficult to take into account high negative pressure and high tightness.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an admission valve for miniature diaphragm pump of high negative pressure to the problem of compromise high negative pressure and high leakproofness that proposes in the solution background art.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
an air inlet valve for a high negative pressure micro diaphragm pump comprises a pump body of the diaphragm pump, wherein a pump cavity is arranged in the pump body, and an air inlet nozzle and an air outlet nozzle are arranged outside the pump body; an air inlet cavity is also arranged in the pump body and is used for communicating an air inlet nozzle with the pump cavity and installing an air inlet valve; the air inlet valve comprises a valve seat and a valve core;
an installation step is arranged in the air inlet cavity, and the valve seat is installed on the installation step; the valve seat is connected with the air inlet cavity in a sealing way, one side of the valve seat is provided with a notch, the notch is used for ventilating and inserting a disassembling tool, and the other side of the valve seat is provided with a plurality of small ventilating holes for balancing air flow; the side edge of the valve seat is also provided with an installation part for fixing the valve seat, and the middle part of the valve seat is provided with an installation hole;
the valve core comprises a valve rod and a sealing sheet, and the sealing sheet is fixed at the end part of the valve rod; the valve rod is fixedly connected in the mounting hole, and the sealing sheet is contacted with the bottom surface of the air inlet cavity and blocks the outlet of the air inlet nozzle; the sealing piece is made of elastic materials.
Further, a mounting opening is formed in the pump cavity, and the mounting portion is arranged in the mounting opening.
Further, the small vent holes are provided in a plurality.
Furthermore, the valve rod is fixedly connected with a limiting part, and the limiting part is used for fixing the position of the valve rod.
Furthermore, a limiting groove is formed in the valve seat, the limiting portion is located in the limiting groove, and the valve seat is clamped by the limiting portion and the sealing sheet.
Further, a filling ring is arranged between the valve seat and the mounting step.
Furthermore, the sealing sheet is an umbrella-shaped structure with an opening far away from the valve rod.
Further, the sealing plate is made of rubber materials.
Further, the import of suction nozzle sets up the side at the pump body, and the import of suction nozzle is provided with the connecting portion of being convenient for connecting tube.
Compared with the prior art, the utility model discloses following beneficial effect has:
one side of the valve seat is provided with a gap for ventilation, and the other side of the valve seat is also provided with a small ventilation hole for balancing air flow. The vent hole is designed to be a notch, so that the vent hole is convenient to process and produce, and meanwhile, a tool can be plugged into the bottom of the valve seat through the notch when the valve seat is installed, so that the vent hole is convenient to install, and the installation time of the valve seat is saved when the valve seat is taken out. The small holes are arranged to realize the balance of the valve seat during air inlet as much as possible, and simultaneously reduce the useless volume of the pump cavity so as to improve the suction vacuum degree of the diaphragm pump. The filling ring further reduces the useless volume of the pump cavity and further improves the suction vacuum degree of the miniature diaphragm pump. The umbrella-type check valve provides a good sealing effect to ensure high tightness.
The valve core comprises a valve rod and a sealing sheet, and the sealing sheet is fixed at the end part of the valve rod; the valve rod is fixedly connected in the mounting hole, and the sealing sheet is contacted with the bottom surface of the air inlet cavity and blocks the outlet of the air inlet nozzle; the gasket adopts elastic material to make, and the gasket adopts elastic material to make and takes place deformation in order to realize the effect of gasket pressure to the realization admits air.
Drawings
Fig. 1 is a schematic top view of the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view taken at A-A of FIG. 1;
fig. 3 is a partially enlarged view of a portion B of fig. 2.
The labels in the figure are: 1-pump body, 2-valve seat, 201-notch, 202-small vent hole, 203-limiting groove, 3-pump cavity, 4-air inlet nozzle, 5-valve core, 501-valve rod, 502-sealing sheet, 503-limiting part, 6-mounting step, 7-air inlet cavity, 8-mounting hole and 9-filling ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
An air inlet valve for a high negative pressure micro diaphragm pump comprises a pump body 1 of the diaphragm pump, wherein a pump cavity 3 is arranged in the pump body 1, and an air inlet nozzle 4 and an air exhaust nozzle are arranged outside the pump body 1; an air inlet cavity 7 is further arranged in the pump body 1, and the air inlet cavity 7 is not only used for communicating the air inlet nozzle 4 with the pump cavity 3, but also used for installing an air inlet valve; the air inlet valve comprises a valve seat 2 and a valve core 5;
an installation step 6 is arranged in the air inlet cavity 7, and the valve seat 2 is installed on the installation step 6; the valve seat 2 is connected with the air inlet cavity 7 in a sealing mode, a notch 201 is formed in one side of the valve seat 2, the notch 201 is used for ventilation, and a plurality of small ventilation holes 202 used for balancing air flow are formed in the other side of the valve seat 2; the side edge of the valve seat 2 is also provided with a mounting part for fixing the valve seat 2, and the middle part of the valve seat 2 is provided with a mounting hole 8;
the orifice 202 is designed to balance the valve seat 2 during intake. The notch 201 of the valve seat 2 is convenient to process, the working time is saved, meanwhile, a tool can be plugged into the bottom of the valve seat 2 through the notch 201 when the valve seat 2 is installed, the installation is convenient, and the installation time of the valve seat 2 is saved when the valve seat 2 is taken out. The provision of small holes also serves to reduce the space occupied by the vent holes while achieving as much as possible balance of the valve seat 2 to improve the accuracy of the diaphragm pump.
The valve core 5 comprises a valve rod 501 and a sealing sheet 502, and the sealing sheet 502 is fixed at the end part of the valve rod 501; the valve rod 501 is fixedly connected in the mounting hole 8, and the sealing sheet 502 is contacted with the bottom surface of the air inlet cavity 7 and blocks the outlet of the air inlet nozzle 4; sealing plate 502 adopts elastic material to make, and sealing plate 502 adopts elastic material to make and takes place the deformation in order to realize that sealing plate 502 receives the effect of pressure.
In practical use, a diaphragm (not shown in the figure) in the pump cavity 3 frequently compresses and expands the volume in the pump cavity 3, when the volume of the pump cavity 3 expands, air enters the air inlet cavity 7 from the air inlet nozzle 4, and before entering the air inlet cavity 7, the sealing sheet 502 is pressed to deform, so that a gap is formed between the sealing sheet 502 and the bottom of the air inlet cavity 7, and the air enters the air inlet cavity 7 from the gap and then enters the pump cavity 3 through the notch 201 and the small vent hole 202. When the diaphragm compresses the volume in the pump chamber 3, the gas in the air inlet cavity 7 presses the sealing sheet 502, so that the sealing sheet 502 is more tightly attached to the bottom of the air inlet cavity 7, and the gas in the air inlet cavity 7 is effectively prevented from flowing back to the air inlet nozzle 4.
In a preferred embodiment, a mounting opening is provided in the pump chamber 3, and the mounting portion is provided in the mounting opening. In order to prevent the mounting part from interfering with the operation of the diaphragm, a mounting opening is provided in the pump chamber 3, so that the bottom of the pump chamber 3 is flat, and the diaphragm is convenient to mount and arrange.
In a preferred embodiment, three of the small vent holes 202 are provided, and the three small vent holes 202 are used for balancing the valve seat 2 during air intake, so that air flow is prevented from flowing from only one side of the valve seat 2, and the working stability of the valve seat 2 can be effectively improved.
In a preferred embodiment, a position-limiting portion 503 is fixed on the valve stem 501, and the position-limiting portion 503 is used for fixing the position of the valve stem 501. The limiting portion 503 is used for blocking the valve rod 501 and preventing the valve rod 501 from naturally falling down.
In a preferred embodiment, the valve seat 2 is provided with the limiting groove 203, and the limiting part 503 is located in the limiting groove 203, so that the space occupied by the limiting part 503 can be reduced compared with the case without the limiting groove 203.
In a preferred embodiment, a filling ring 9 is arranged between the valve seat 2 and the mounting step 6, the filling ring 9 is a rubber filling ring, and the filling ring 9 is used for filling the air inlet cavity 7, so that the useless volume of the pump cavity 3 is further reduced.
In a preferred embodiment, sealing disc 502 is an umbrella structure that opens away from valve stem 501 (specifically an outwardly opening, flared structure, as shown in fig. 2 and 3). The umbrella structure can increase the contact area of the sealing sheet 502 and gas, so that the sealing sheet 502 can quickly respond to the change of gas pressure.
In a preferred embodiment, the sealing plate 502 is made of rubber material, and the sealing plate 502 made of rubber material not only has elasticity but also can ensure the sealing performance after the sealing plate 502 is contacted with the bottom of the air inlet cavity 7.
In a preferred embodiment, the inlet of the intake nozzle 4 is arranged at the side of the pump body 1, and the inlet of the intake nozzle 4 is provided with a connection portion for facilitating the connection of a pipe. The design of suction nozzle 4 is convenient for make the pump body 1 install with other devices easily at the side of the pump body 1, sets up connecting portion and is convenient for connecting tube.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. An air inlet valve for a high negative pressure micro diaphragm pump comprises a pump body (1) of the diaphragm pump, wherein a pump cavity (3) is arranged in the pump body (1), and an air inlet nozzle (4) and an air exhaust nozzle are arranged outside the pump body (1); the method is characterized in that: an air inlet cavity (7) is further arranged in the pump body (1), and the air inlet cavity (7) is not only used for communicating the air inlet nozzle (4) with the pump cavity (3) but also used for installing an air inlet valve; the air inlet valve comprises a valve seat (2) and a valve core (5);
an installation step (6) is arranged in the air inlet cavity (7), and the valve seat (2) is installed on the installation step (6); the valve seat (2) is connected with the air inlet cavity (7) in a sealing mode, a notch (201) is formed in one side of the valve seat (2), the notch (201) is used for ventilation, and a plurality of small ventilation holes (202) used for balancing air flow are formed in the other side of the valve seat (2); the side edge of the valve seat (2) is also provided with an installation part for fixing the valve seat (2), and the middle part of the valve seat (2) is provided with an installation hole (8);
the valve core (5) comprises a valve rod (501) and a sealing sheet (502), and the sealing sheet (502) is fixed at the end part of the valve rod (501); the valve rod (501) is fixedly connected in the mounting hole (8), and the sealing sheet (502) is contacted with the bottom surface of the air inlet cavity (7) and blocks the outlet of the air inlet nozzle (4); the sealing plate (502) is made of elastic material.
2. An air intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: the pump cavity (3) is internally provided with a mounting opening, and the mounting part is arranged in the mounting opening.
3. An air intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: three small ventilation holes (202) are arranged.
4. The intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: a limiting part (503) is fixedly connected to the valve rod (501), and the limiting part (503) is used for fixing the position of the valve rod (501).
5. The intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: a limiting groove (203) is formed in the valve seat (2), the limiting portion (503) is located in the limiting groove (203), and the valve seat (2) is clamped by the limiting portion (503) and the sealing sheet (502).
6. The intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: a filling ring (9) is arranged between the valve seat (2) and the mounting step (6).
7. The intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: the sealing sheet (502) is an umbrella-shaped structure with an opening far away from the valve rod (501).
8. An air intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: the sealing plate (502) is made of rubber materials.
9. An air intake valve for a high negative pressure micro diaphragm pump according to claim 1, wherein: the inlet of the air inlet nozzle (4) is arranged on the side edge of the pump body (1), and the inlet of the air inlet nozzle (4) is provided with a connecting part which is convenient for connecting a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221971511.4U CN217815173U (en) | 2022-07-28 | 2022-07-28 | Air inlet valve for high-negative-pressure micro diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221971511.4U CN217815173U (en) | 2022-07-28 | 2022-07-28 | Air inlet valve for high-negative-pressure micro diaphragm pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217815173U true CN217815173U (en) | 2022-11-15 |
Family
ID=83971203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221971511.4U Active CN217815173U (en) | 2022-07-28 | 2022-07-28 | Air inlet valve for high-negative-pressure micro diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217815173U (en) |
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2022
- 2022-07-28 CN CN202221971511.4U patent/CN217815173U/en active Active
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