CN217815174U

CN217815174U - Air outlet valve mounting structure for micro diaphragm pump

Info

Publication number: CN217815174U
Application number: CN202221980346.9U
Authority: CN
Inventors: 蒲小勤
Original assignee: Chengdu Ruihai Fluid Technology Co ltd
Current assignee: Chengdu Ruihai Fluid Technology Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-11-15
Anticipated expiration: 2032-07-28

Abstract

The utility model discloses an air outlet valve mounting structure for a miniature diaphragm pump, which comprises an outer valve seat, an inner valve seat and a valve core; an installation step is arranged in the air outlet, and the outer valve seat is placed on the installation step; one end of the outer valve seat close to the pump cavity is provided with a positioning notch, and a compression nail is arranged in the pump cavity; the outer valve seat comprises a first cylinder and a second cylinder which are fixedly connected with each other; the inner valve seat is in threaded connection with the second cylinder; the middle part of the inner valve seat is provided with a mounting hole, and the inner valve seat is also provided with a ventilation channel for ventilation; the valve core comprises a valve rod, a sealing sheet and a limiting part, the sealing sheet is arranged at the end part of the valve rod, and the limiting part is arranged on the valve rod; the limiting part is used for fixing the position of the valve rod in the mounting hole; the sealing sheet is contacted with the end surface of the first cylinder and can block the first cylinder; the sealing plate is made of an elastic material. The air outlet valve with the design has the advantages of compact structure, convenience in installation and accurate debugging and stable performance.

Description

Air outlet valve mounting structure for miniature diaphragm pump

Technical Field

The utility model belongs to the technical field of miniature diaphragm pump, specifically be a venthole valve mounting structure for miniature diaphragm pump.

Background

The diaphragm pump is a displacement pump on the principle of operation, and the diaphragm pump drives the link mechanism in the pump body to move up and down through the motor, and the diaphragm (leather cup) connected with the link mechanism begins to creep and deform up and down, so that high-pressure and low-pressure states frequently appear in the pump cavity, a medium is sucked into the diaphragm pump when the pump cavity is at low pressure, and the medium is discharged out of the diaphragm pump when the pump cavity is at high pressure, thereby realizing the function of medium transmission.

The diaphragm pump needs to be provided with an air outlet valve at an air outlet to prevent the phenomenon of back suction and back flow. In the prior art, because the exhaust valve must be opposite to the intake valve, a double-layer pump cavity design is usually adopted, and the structure is complex in structure, high in cost, poor in sealing performance and high in working noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air outlet valve mounting structure for miniature diaphragm pump to in proposing prior art among the solution background art, because discharge valve must be reverse with the admission valve, adopt double-deck pump chamber design usually, this kind of structure is not only complicated, and is with high costs, and the leakproofness is relatively poor, and noise at work is great.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

an air outlet valve mounting structure for a miniature diaphragm pump is mounted in an air outlet in a pump cavity of the diaphragm pump, and comprises an outer valve seat, an inner valve seat and a valve core; an installation step is arranged in the air outlet, and the outer valve seat is placed on the installation step; one end of the outer valve seat close to the pump cavity is provided with a positioning notch, a pressing nail is arranged in the pump cavity and used for pressing the positioning notch so that the outer valve seat is tightly pressed on the mounting step;

the outer valve seat comprises a first cylinder and a second cylinder which are fixedly connected with each other; the outer diameters of the first cylinder and the second cylinder are the same, and the inner diameter of the first cylinder is smaller than that of the second cylinder; the inner valve seat is in threaded connection with the second cylinder; the middle part of the inner valve seat is provided with a mounting hole, and the inner valve seat is also provided with a ventilation channel for ventilation;

the valve core comprises a valve rod, a sealing sheet and a limiting part, the sealing sheet is arranged at the end part of the valve rod, and the limiting part is arranged on the valve rod; the limiting part is used for fixing the position of the valve rod in the mounting hole; the sealing sheet is contacted with the end surface of the first cylinder and can block the first cylinder; the section of the sealing sheet is of a wedge-shaped structure with thick center and thin edge; the sealing plate is made of an elastic material.

Furthermore, at least two positioning notches are arranged, and the positioning notches are arc-shaped; the top of compressing tightly the nail is provided with circular compressing tightly the dish, and the marginal part that compresses tightly the dish can coincide with arc location breach.

Furthermore, a sealing groove is formed in the outer ring of the first cylinder and used for installing a sealing ring.

Furthermore, the sealing sheet is an umbrella-shaped structure with an opening far away from the valve rod.

Furthermore, the limiting portion is sleeved outside the valve rod, and the limiting portion and the sealing sheet clamp the inner valve seat together so that the whole valve core is fixed on the inner valve seat.

Further, the sealing plate is made of rubber materials.

Further, an air outlet nozzle is arranged outside the diaphragm pump and communicated with the air outlet.

Further, the vent passage on the inner valve seat includes at least two fan-shaped openings disposed on the peripheral surface of the inner valve seat.

Furthermore, the edge of one side, close to the mounting step, of the outer valve seat is provided with a chamfer.

Furthermore, a plurality of dismounting operation holes are also arranged on the outer valve seat.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model designs the outer valve seat and the inner valve seat, and designs the two valve seats into threaded connection for convenient connection and matching; the valve core and the inner valve seat can be installed in advance by workers before installation, the inner valve seat and the outer valve seat are installed again, and the sealing piece can be guaranteed to be in contact with and sealed with the end face of the first barrel through controlling the inner valve seat to be screwed in deeply. The outer valve seat is directly placed on the installation step subsequently, the compression nail is utilized to press the whole valve seat, the exhaust valve and the air inlet valve can be installed in the pump cavity in the same direction through the design, the structure of the pump cavity is simplified, the sealing performance of the pump is improved, the excellent performance of the air outlet valve can be guaranteed, the installation is convenient, and the outer valve seat has the advantages of being compact in structure and convenient to accurately adjust.

When the air-tight sealing device is used, the diaphragm compresses the pump cavity, the air pressure in the pump cavity is increased, the air in the first cylinder compresses the sealing sheet to deform, a gap is formed between the sealing sheet and the end face of the first cylinder, the air enters the second cylinder from the gap, enters the air outlet from the ventilation channel on the inner valve seat and is discharged from the air outlet. When the diaphragm contracts, form the negative pressure in the pump chamber, in gaseous air inlet from the diaphragm pump entered into the pump chamber, and the interior gas of second barrel then can oppress the gasket and make the gasket closely laminate with the terminal surface of first barrel, prevented the gas backward flow.

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 an enlarged view of a portion B of FIG. 2;

fig. 4 is a schematic view of the structure of the inner valve seat of the present invention.

The labels in the figure are: 1-a compression nail, 2-an outer valve seat, 201-a first cylinder, 202-a second cylinder, 3-an air outlet nozzle, 4-a pump cavity, 5-a sealing groove, 6-an installation step, 7-an air outlet, 8-an inner valve seat, 9-a valve rod, 10-a limiting part, 11-an installation hole, 12-a sealing sheet and 13-a ventilation channel.

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 outlet valve mounting structure for a miniature diaphragm pump is mounted in an air outlet 7 in a pump cavity 4 of the diaphragm pump, and comprises an outer valve seat 2, an inner valve seat 8 and a valve core; an installation step 6 is arranged in the air outlet 7, and the outer valve seat 2 is placed on the installation step 6; a positioning notch is formed in one end, close to the pump cavity 4, of the outer valve seat 2, a compression nail 1 is arranged in the pump cavity 4, and the compression nail 1 is used for pressing the positioning notch to enable the outer valve seat 2 to be tightly pressed on the installation step 6; the top cover at the top of the pressing nail 1 presses on the bottom in the positioning notch, so that the outer valve seat 2 is pressed on the mounting step 6, and the position of the mounting step 6 is limited.

The outer valve seat 2 comprises a first cylinder 201 and a second cylinder 202 which are fixedly connected with each other; the first cylinder 201 and the second cylinder 202 have the same outer diameter, and the inner diameter of the first cylinder 201 is smaller than that of the second cylinder 202; specifically, the inner diameter of the first cylinder 201 is 1cm smaller than the inner diameter of the second cylinder. An internal thread is arranged inside the second cylinder 202, an external thread is arranged outside the inner valve seat 8, and the inner valve seat 8 is connected in the second cylinder 202 in a threaded manner; the middle part of the inner valve seat 8 is provided with a mounting hole 11, the mounting hole 11 is used for mounting a valve core, the inner valve seat 8 is further provided with a ventilation channel 13 for ventilation, and the ventilation channel 13 is used for passing gas out from the gas outlet 7 as required.

The valve core comprises a valve rod 9, a sealing sheet 12 and a limiting part 10, wherein the sealing sheet 12 is arranged at the end part of the valve rod 9, and the limiting part 10 is arranged on the valve rod 9; the valve rod 9 is connected in the mounting hole 11, and the limiting part 10 is used for fixing the position of the valve rod 9 in the mounting hole 11; the sealing sheet 12 is in contact with the end surface of the first cylinder 201 and can block the first cylinder 201; the section of the sealing sheet 12 is of a wedge-shaped structure with thick center and thin edge; the sealing plate 12 is made of an elastic material, such as a rubber material, and is used for deforming the sealing plate 12 under pressure and providing sufficient sealing performance for the sealing plate 12.

During actual use, the diaphragm compresses the pump cavity 4, the air pressure in the pump cavity 4 is increased, the air in the first cylinder 201 presses the sealing sheet 12 to deform, a gap is formed between the sealing sheet 12 and the end face of the first cylinder 201, the air enters the second cylinder 202 from the gap, enters the air outlet 7 from the ventilation channel 13 on the inner valve seat 8, and is finally discharged from the air outlet 7.

When the diaphragm contracts, negative pressure is formed in the pump cavity 4, air enters the pump cavity 4 from the air inlet of the diaphragm pump, and the air in the second cylinder 202 presses the sealing sheet 12, so that the sealing sheet 12 is tightly attached to the end surface of the first cylinder 201, and air backflow is prevented.

The utility model designs the valve seats into the outer valve seat 2 and the inner valve seat 8, and designs the two valve seats into threaded connection for convenient connection and matching; the valve core and the inner valve seat 8 can be installed in advance, then the inner valve seat 8 and the outer valve seat 2 are installed, and at the moment, the sealing sheet 12 can be ensured to be in contact with and sealed with the end face of the first cylinder 201 by controlling the screwing-in depth of the inner valve seat 8. The installation of above-mentioned three forms a whole disk seat, and on follow-up direct placing whole disk seat installation step 6, it can to recycle compressing pin 1 and push down whole disk seat, makes discharge valve and admission valve can install in the pump chamber in same direction through this kind of design, has simplified pump chamber structure, has improved the leakproofness of pump, can guarantee that the excellent performance of air outlet valve and the installation of being convenient for.

In a preferred embodiment, at least two positioning gaps are arranged, and the positioning gaps are arc-shaped; the top of the compression nail 1 is provided with a circular compression disc, and the edge part of the compression disc can be matched with the arc-shaped positioning notch. The arc-shaped positioning notch can prevent the pressing disc from being scratched when being matched with the outer valve seat 2.

In a preferred embodiment, the outer ring of the first cylinder 201 is provided with a sealing groove 5, and the sealing groove 5 is used for installing a sealing ring. The sealing ring is made of rubber materials, the sealing performance between the outer wall of the outer valve body and the inner wall of the air outlet 7 can be guaranteed through the sealing ring, and air in the pump cavity 4 is prevented from leaking from a gap between the outer valve body and the air outlet 7.

In a preferred embodiment, the sealing disc 12 is of an umbrella-type construction opening away from the valve stem 9 (the umbrella-type construction being in particular an outwardly opening, flared construction, see fig. 2 and 3). The umbrella-shaped structure can increase the contact area between the sealing sheet 12 and the gas, and can more sensitively react to the change of the gas pressure.

In a preferred embodiment, the limiting part 10 is sleeved outside the valve rod 9, and the limiting part 10 and the sealing sheet 12 jointly clamp the inner valve seat 8 so that the whole valve core is fixed on the inner valve seat 8.

In a preferred embodiment, the sealing plate 12 is made of a rubber material, which is easy to ensure tightness under elastic conditions.

In a preferred embodiment, the diaphragm pump is externally provided with an air outlet nozzle 3, and the air outlet nozzle 3 is communicated with an air outlet 7. The air outlet nozzle 3 is designed to be conveniently connected with a pipeline or other devices.

In a preferred embodiment, the vent channel 13 in the inner valve seat 8 comprises at least two fan-shaped openings arranged on the circumference of the inner valve seat 8. The fan-shaped opening enables the threaded connection of the inner valve seat 8 with the second cylinder 202 while ensuring that the vent channel 13 on the inner valve seat 8 is sufficiently large.

In a preferred embodiment, the edge of the outer valve seat 2 on the side close to the mounting step 6 is provided with a chamfer. Preventing the outer valve body from scratching the pump chamber 4 during installation.

In a preferred embodiment, the outer valve seat 2 is further provided with a plurality of assembling and disassembling operation holes, and the assembling and disassembling operation holes can facilitate assembling and disassembling the valve seat by using tools.

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 merely for convenience of description and simplification of the 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 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

1. The utility model provides an air outlet valve mounting structure for miniature diaphragm pump installs in gas outlet (7) in pump chamber (4) of diaphragm pump, its characterized in that: the mounting structure comprises an outer valve seat (2), an inner valve seat (8) and a valve core; an installation step (6) is arranged in the air outlet (7), and the outer valve seat (2) is placed on the installation step (6); a positioning notch is formed in one end, close to the pump cavity (4), of the outer valve seat (2), a pressing nail (1) is arranged in the pump cavity (4), and the pressing nail (1) is used for pressing the positioning notch of the outer valve seat to enable the outer valve seat (2) to be tightly pressed on the mounting step (6);

the outer valve seat (2) comprises a first cylinder (201) and a second cylinder (202) which are fixedly connected with each other; the outer diameters of the first cylinder (201) and the second cylinder (202) are the same, and the inner diameter of the first cylinder (201) is smaller than that of the second cylinder (202); the inner valve seat (8) is in threaded connection with the second cylinder (202); the middle part of the inner valve seat (8) is provided with a mounting hole (11), and the inner valve seat (8) is also provided with a ventilation channel (13) for ventilation;

the valve core comprises a valve rod (9), a sealing sheet (12) and a limiting part (10), the sealing sheet (12) is arranged at the end part of the valve rod (9), and the limiting part (10) is arranged on the valve rod (9); the valve rod (9) is connected in the mounting hole (11), and the limiting part (10) is used for fixing the position of the valve rod (9) in the mounting hole (11); the sealing sheet (12) is contacted with the end surface of the first cylinder (201) and can block the first cylinder (201); the section of the sealing sheet (12) is of a wedge-shaped structure with a thick center and thin edges; the sealing plate (12) is made of an elastic material.

2. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: at least two positioning notches are arranged, and the positioning notches are arc-shaped; the top of the compression nail (1) is provided with a circular compression disc, and the edge part of the compression disc can be matched with the arc-shaped positioning notch.

3. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the outer ring of the first cylinder (201) is provided with a sealing groove (5), and the sealing groove (5) is used for installing a sealing ring.

4. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the sealing sheet (12) is an umbrella-shaped structure with an opening far away from the valve rod (9).

5. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the limiting part (10) is sleeved outside the valve rod (9), and the limiting part (10) and the sealing sheet (12) clamp the inner valve seat (8) together to enable the whole valve core to be fixed on the inner valve seat (8).

6. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the sealing piece (12) is made of rubber materials.

7. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: an air outlet nozzle (3) is arranged outside the diaphragm pump, and the air outlet nozzle (3) is communicated with an air outlet (7).

8. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the ventilation channel (13) on the inner valve seat (8) comprises at least two fan-shaped openings arranged on the circumference of the inner valve seat (8).

9. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the edge of the outer valve seat (2) close to one side of the mounting step (6) is provided with a chamfer.

10. An air outlet valve mounting structure for a micro diaphragm pump according to claim 1, wherein: the outer valve seat (2) is also provided with a plurality of dismounting operation holes.