CN215890396U

CN215890396U - Pneumatic diaphragm pump air valve

Info

Publication number: CN215890396U
Application number: CN202121923734.9U
Authority: CN
Inventors: 周礼刚; 张昌凯
Original assignee: Skyley Fluid Engineering Technology Shanghai Co ltd
Current assignee: Sky Force Fluid Technology Zhejiang Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-02-22
Anticipated expiration: 2031-08-17

Abstract

The utility model belongs to the field of pneumatic diaphragm pumps, and particularly discloses a pneumatic diaphragm pump air valve which comprises a main air valve shell, a middle shell and a guide valve, wherein a hollow valve sleeve is packaged in the main air valve shell, a valve core is embedded in the valve sleeve in a sliding manner, and a piston is fixed at one end of the valve core; a left cavity and a right cavity are respectively arranged in the middle shell, an air inlet is reserved in the fixed seat, and an air outlet communicated with the interior of the valve sleeve is reserved in the main air valve shell; the valve core side wall is provided with a left switching cavity and a right switching cavity which are concave at positions corresponding to the left cavity and the right cavity respectively, two constant air inlet channels and two circulating air inlet channels are arranged in the middle shell respectively, one end of each constant air inlet channel and one end of each circulating air inlet channel are communicated with the air inlet, and the other end of each constant air inlet channel and the other end of each circulating air inlet channel are communicated with the inner cavity of the valve sleeve. The utility model can effectively solve the problem that the transition position of the gas valve core is blocked, avoid the valve core from being positioned at the dead point position, avoid the halt in the working process of the pump body, reduce the halt maintenance of a user and improve the working efficiency.

Description

Pneumatic diaphragm pump air valve

Technical Field

The utility model relates to the field of pneumatic diaphragm pumps, in particular to a pneumatic diaphragm pump air valve.

Background

The pneumatic diaphragm pump is a new type of conveying machinery, and adopts compressed air as power source, and can pump out and suck up various corrosive liquids, liquids with particles, high viscosity, easy volatilization, flammability and strong toxicity.

The pneumatic diaphragm pump takes compressed gas as a power source, and circularly operates to convey liquid by means of the mutual matching of a main air valve and a distribution valve, so that the main air valve and the distribution valve are the core of the pump. The existing pneumatic diaphragm pump gas circuit part is characterized in that air inflow is a constant air inlet power source, a guide valve is a device for realizing circulating gas, and a gas valve core realizes the up-and-down reciprocating action through the circulating gas, so that the circulating air inflow of a left cavity and a right cavity is realized, when the left cavity is subjected to air inflow, the right cavity is communicated with the atmosphere for exhaust, and when the right cavity is subjected to air inflow, the left cavity is communicated with the atmosphere for exhaust. Above-mentioned structure, the dead phenomenon of card appears easily, and when the transition position in the middle of left chamber and right chamber was blocked to the gas valve core, left chamber and right chamber were neither admitted air, also not discharged, were in the dead point position, and the pump was shut down, and the customer scene will be torn open main air valve and push away the pneumatic valve to one side, and the dress goes again, influences production efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pneumatic diaphragm pump air valve to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a pneumatic diaphragm pump air valve comprises a main air valve shell, a middle shell and a guide valve, wherein the main air valve shell and the guide valve are respectively arranged at two ends of the middle shell; a hollow valve sleeve is packaged in the main air valve shell through a main air valve sealing cover, a valve core is embedded in the valve sleeve in a sliding mode, and a piston is fixed at one end of the valve core; a fixed seat is arranged outside the guide valve, a left cavity and a right cavity are respectively arranged in the middle shell, an air inlet is reserved in the fixed seat, and an air outlet communicated with the interior of the valve sleeve is reserved in the main air valve shell;

the valve core side wall is provided with a left switching cavity and a right switching cavity which are concave at positions corresponding to the left cavity and the right cavity respectively, two constant air inlet channels and two circulating air inlet channels are arranged in the middle shell respectively, one end of each constant air inlet channel and one end of each circulating air inlet channel are communicated with the air inlet, and the other end of each constant air inlet channel and the other end of each circulating air inlet channel are communicated with the inner cavity of the valve sleeve.

Preferably, the cross section of the inner cavity of the valve sleeve is of a T-shaped structure and comprises a vertical cavity and a transverse cavity which are communicated with each other, the valve sleeve is embedded into the vertical cavity in a matching mode and slides, two ends of the piston extend out of the valve core and are arranged in the transverse cavity to slide, and the cross section area of the piston is 2 times that of the valve core.

Preferably, an airflow channel for communicating the valve sleeve with the left cavity and the right cavity is reserved on the side wall of the main air valve shell.

Preferably, the two circulating air inlet channels are matched with the guide valve to realize air inlet switching, and the two circulating air inlet channels are respectively arranged on one sides of the left cavity and the right cavity.

Preferably, the two constant air inlet channels are respectively arranged on one sides of the left cavity and the right cavity, the constant air inlet channel on one side of the left cavity is connected to the inner cavity at the top of the valve sleeve through a first flow guide channel, and the constant air inlet channel on one side of the right cavity is connected to the inner cavity at the bottom of the valve sleeve through a second flow guide channel.

Compared with the prior art, the utility model has the beneficial effects that: .

The utility model can effectively solve the problem that the transition position of the gas valve core is blocked, avoid the valve core from being positioned at the dead point position, avoid the halt in the working process of the pump body, reduce the halt maintenance of a user and improve the working efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. a main gas valve housing; 2. a valve housing; 3. a valve core; 4. a piston; 5. a middle housing; 6. a pilot valve; 7. a main air valve sealing cover; 8. a fixed seat; 9. a left lumen; 10. a right lumen; 11. an air inlet; 12. an exhaust port; 13. a left switching chamber; 14. a right switching chamber; 15. a constant intake passage; 16. a circulating intake passage; 17. a first flow guide passage; 18. a second flow guide passage.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the present invention provides a technical solution: a pneumatic diaphragm pump air valve comprises a main air valve shell 1, a middle shell 5 and a guide valve 6, wherein the main air valve shell 1 and the guide valve 6 are respectively arranged at two ends of the middle shell 5; a hollow valve sleeve 2 is packaged in the main gas valve shell 1 through a main gas valve sealing cover 7, a valve core 3 is embedded in the valve sleeve 2 in a sliding mode, and a piston 4 is fixed at one end of the valve core 3; a fixed seat 8 is arranged on the outer side of the guide valve 6, a left cavity 9 and a right cavity 10 are respectively arranged in the middle shell 5, an air inlet 11 is reserved in the fixed seat 8, and an air outlet 12 communicated with the interior of the valve sleeve 2 is reserved in the main air valve shell 1;

the side wall of the valve core 3 is provided with a left switching cavity 13 and a right switching cavity 14 which are concave at positions corresponding to the left cavity 9 and the right cavity 10 respectively, two constant air inlet channels 15 and two circulating air inlet channels 16 are arranged in the middle shell 5 respectively, one end of each constant air inlet channel 15 and one end of each circulating air inlet channel 16 are communicated with the air inlet 11, and the other end of each constant air inlet channel 15 is communicated with the inner cavity of the valve sleeve 2.

Furthermore, the cross section of the inner cavity of the valve sleeve 2 is of a T-shaped structure and comprises a vertical cavity and a horizontal cavity which are communicated with each other, the valve sleeve 2 is embedded into the vertical cavity in a matching mode and slides in the vertical cavity, two ends of a piston 4 extend out of the valve core 3 and are arranged in the horizontal cavity to slide in the horizontal cavity, and the cross section area of the piston 4 is 2 times that of the valve core 3.

Furthermore, an airflow channel for communicating the valve sleeve 2 with the left cavity 9 and the right cavity 10 is reserved on the side wall of the main air valve housing 1.

Furthermore, the two circulating air inlet channels 16 are matched with the guide valve 6 to realize air inlet switching, and the two circulating air inlet channels 16 are respectively arranged on one sides of the left cavity 9 and the right cavity 10.

Furthermore, the two constant air inlet channels 15 are respectively arranged at one side of the left cavity 9 and one side of the right cavity 10, the constant air inlet channel 15 at one side of the left cavity 9 is connected to the top inner cavity of the valve sleeve 2 through a first flow guide channel 17, and the constant air inlet channel 15 at one side of the right cavity 10 is connected to the bottom inner cavity of the valve sleeve 2 through a second flow guide channel 18.

The working principle is as follows: the air inlet 11 is a power source of a constant air inlet channel 15, the guide valve 6 and the circulating air inlet channel 16 realize circulating air exchange, the valve core 3 realizes the up-and-down reciprocating action in the valve sleeve 2 through the switching of the circulating air inlet channel 16, so that the circulating air inlet of the left cavity 9 and the right cavity 10 is realized, when the left cavity 9 is used for air inlet, the right cavity 10 is communicated with the atmosphere for air exhaust, and when the right cavity 10 is used for air inlet, the left cavity 9 is communicated with the atmosphere for air exhaust.

The constant air inlet channel 15 at one side of the right cavity 10 is connected to the inner cavity at the bottom of the valve sleeve 2 through a second diversion channel 18, so that constant compressed air is introduced into the bottom of the valve core 3, no matter where the valve core 3 is located, as long as compressed air is introduced into the pump, the valve core 3 is pushed to the position shown in fig. 1, and the valve core 3 is prevented from being located at a middle dead center position; the piston 4 is added at one end of the valve core 3, because the cross section area of the piston 4 is 2 times of that of the valve core 3, when compressed gas is arranged at the top end and the bottom end of the valve core 3, the pressure at two sides is equal, the area is different, the side pressure with larger area is larger, the valve core 3 is pushed to move downwards at the moment, so that the gas is fed into the right cavity 10, the gas is exhausted from the left cavity 9, when the gas on the piston 4 disappears, the valve core 3 is pushed to the upper side, the gas is fed into the left cavity 9, the gas is exhausted from the right cavity 10, and the effect of circularly conveying fluid is achieved.

It is worth noting that: the whole device realizes control over the device through the master control button, and the device matched with the control button is common equipment, belongs to the existing mature technology, and is not repeated for the electrical connection relation and the specific circuit structure.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pneumatic diaphragm pump air valve comprises a main air valve shell (1), a middle shell (5) and a guide valve (6), wherein the main air valve shell (1) and the guide valve (6) are respectively arranged at two ends of the middle shell (5); the valve is characterized in that a hollow valve sleeve (2) is packaged in the main air valve shell (1) through a main air valve sealing cover (7), a valve core (3) is embedded in the valve sleeve (2) in a sliding mode, and a piston (4) is fixed at one end of the valve core (3); a fixed seat (8) is arranged on the outer side of the guide valve (6), a left cavity (9) and a right cavity (10) are respectively arranged in the middle shell (5), an air inlet (11) is reserved in the fixed seat (8), and an air outlet (12) communicated with the interior of the valve sleeve (2) is reserved in the main valve shell (1);

the side wall of the valve core (3) is provided with a left switching cavity (13) and a right switching cavity (14) which are concave inwards at positions corresponding to the left cavity (9) and the right cavity (10), two constant air inlet channels (15) and two circulating air inlet channels (16) are arranged in the middle shell (5), one end of each constant air inlet channel (15) and one end of each circulating air inlet channel (16) are communicated with the air inlet (11), and the other end of each constant air inlet channel (15) is communicated with the inner cavity of the valve sleeve (2).

2. A pneumatic diaphragm pump air valve according to claim 1, wherein: the cross section of the inner cavity of the valve sleeve (2) is of a T-shaped structure and comprises a vertical cavity and a transverse cavity which are communicated with each other, the valve sleeve (2) is embedded into the vertical cavity in a matching mode and slides in the vertical cavity, two ends of a piston (4) extend out of the valve core (3) and are arranged in the transverse cavity to slide in the transverse cavity, and the cross section area of the piston (4) is 2 times that of the valve core (3).

3. A pneumatic diaphragm pump air valve according to claim 1, wherein: and an airflow channel for communicating the valve sleeve (2) with the left cavity (9) and the right cavity (10) is reserved on the side wall of the main air valve shell (1).

4. A pneumatic diaphragm pump air valve according to claim 1, wherein: the two circulating air inlet channels (16) are matched with the guide valve (6) to realize air inlet switching, and the two circulating air inlet channels (16) are respectively arranged on one sides of the left cavity (9) and the right cavity (10).

5. A pneumatic diaphragm pump air valve according to claim 1, wherein: the two constant air inlet channels (15) are respectively arranged on one sides of the left cavity (9) and the right cavity (10), the constant air inlet channel (15) on one side of the left cavity (9) is connected to the inner cavity at the top of the valve sleeve (2) through a first flow guide channel (17), and the constant air inlet channel (15) on one side of the right cavity (10) is connected to the inner cavity at the bottom of the valve sleeve (2) through a second flow guide channel (18).