CN212296804U

CN212296804U - Energy-saving internal control type pneumatic diaphragm pump

Info

Publication number: CN212296804U
Application number: CN202021515113.2U
Authority: CN
Inventors: 曹建波; 章锋
Original assignee: Xingyu Electron Ningbo Co ltd
Current assignee: Xingyu Electron Ningbo Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-01-05
Anticipated expiration: 2030-07-28

Abstract

The utility model relates to an energy-saving internal control type pneumatic diaphragm pump, wherein a pump body is provided with an air inlet P, two sides of the pump body are correspondingly provided with a working cavity A and a working cavity B, a first diaphragm is arranged in the working cavity A to be divided into a driving cavity A0 and a material conveying cavity A1, and a second diaphragm is arranged in the working cavity B to be divided into a driving cavity B0 and a material conveying cavity B1; a piston rod is connected between the first diaphragm and the second diaphragm, and a reversing valve is arranged between the air inlet P and the working ports of the cavity A and the cavity B; an energy-saving valve is arranged at the position of the air inlet P and comprises a valve body, an air inlet P1 and a working port are arranged on the valve body, the working port of the energy-saving valve is communicated with the air inlet P of the pneumatic diaphragm pump, a valve core is arranged between the air inlet P1 and the working port, a mandril is connected to the valve core and abuts against a spring, and a control cavity communicated with the working port is further arranged in the valve body. The advantages are that: the structure is reasonable and compact, and the compressed air of the over-filling part can be saved.

Description

Energy-saving internal control type pneumatic diaphragm pump

Technical Field

The utility model relates to a pneumatic control technical field, in particular to pneumatic diaphragm pump's energy-conserving technique especially indicates an energy-conserving interior accuse formula pneumatic diaphragm pump.

Background

The pneumatic diaphragm pump is a novel conveying machine and is the most novel pump in China at present. The compressed air is used as power source, and can be used for pumping and completely absorbing various corrosive liquids, liquids with particles, high viscosity, easy volatilization, flammability and high toxicity. Because of the above features of pneumatic diaphragm pumps, pneumatic diaphragm pumps have since their birth been invading the market for other pumps, such as: pneumatic diaphragm pumps have taken an absolutely predominant position in paint spraying and ceramic industries, while in other industries, such as environmental protection, waste water treatment, construction, pollution discharge, fine chemical industry, the market share is expanding in an unimpeded manner.

The pneumatic diaphragm pump is a volumetric pump which is powered by compressed air and changes volume due to reciprocating deformation of a diaphragm. The internal control type pneumatic diaphragm pump is characterized by that in the diaphragm pump a reversing control valve for controlling piston rod to make reciprocating movement is built-in the diaphragm pump body, and the diaphragm of the diaphragm pump can be moved to trigger the reversing action of said valve.

In order to improve productivity, a conventional air diaphragm pump generally adjusts the pressure of compressed air supplied to the air diaphragm pump to be much higher than a pressure required for a load. When the working cavity is maximum at the top end of the piston rod, the pressure is increased to the maximum value; then all the air is discharged into the air when the air moves reversely; therefore, there is a large amount of excess compressed air that enters the diaphragm pump and is discharged in the reverse motion and wasted. Therefore, the structure of the existing air-operated diaphragm pump needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that to prior art's current situation, provide rational in infrastructure, compact, can practice thrift the energy-conserving interior accuse formula pneumatic diaphragm pump that overcharges partial compressed air.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

an energy-saving internal control type pneumatic diaphragm pump comprises a pump body, wherein an air inlet P is formed in the pump body, a working cavity A and a working cavity B are correspondingly arranged on two sides of the pump body, a first diaphragm is arranged in the working cavity A and is divided into a driving cavity A0 and a material conveying cavity A1, the driving cavity A0 is communicated with a working opening of the cavity A, the material conveying cavity A1 is communicated with a material inlet and outlet of the cavity A, a second diaphragm is arranged in the working cavity B and is divided into a driving cavity B0 and a material conveying cavity B1, the driving cavity B0 is communicated with a working opening of the cavity B, and the material conveying cavity B1 is communicated with a material inlet and outlet of the cavity;

a piston rod is connected between the first diaphragm and the second diaphragm, and a reversing valve is arranged between the air inlet P and the working ports of the cavity A and the cavity B;

an energy-saving valve is arranged at the position of the air inlet P and comprises a valve body, an air inlet P1 and a working port are arranged on the valve body, the working port of the energy-saving valve is communicated with the air inlet P of the pneumatic diaphragm pump, a valve core is arranged between the air inlet P1 and the working port, a mandril is connected to the valve core and abuts against a spring, and a control cavity communicated with the working port is further arranged in the valve body.

The optimized technical measures further comprise:

the other end of the spring is abutted against an adjusting nut, an adjusting screw rod is arranged at the center of the adjusting nut, and a hand wheel is connected to the outer side of the adjusting screw rod.

The two ends of the valve body are respectively and correspondingly provided with a front end cover and a rear end cover, and the center of the front end cover is convexly provided with a lug boss.

And a first sealing ring is arranged at the outlet of the working port.

And a second sealing ring is arranged between the valve core and the inner wall of the valve body.

And a third sealing ring is arranged between the ejector rod and the inner wall of the valve body.

And a fourth sealing ring is arranged between the front end cover and the inner wall of the valve body.

The valve body is fixed with the pump body through screws.

Two sides of the middle part of the first membrane are respectively provided with a first pressing sheet; and second pressing sheets are respectively arranged on two sides of the middle part of the second membrane.

The first diaphragm and the second diaphragm are correspondingly fixed at two ends of the piston rod through fixing screws.

The utility model discloses an energy-conserving internal control formula pneumatic diaphragm pump, rational in infrastructure, the first diaphragm of working chamber A and the second diaphragm of working chamber B of pneumatic diaphragm pump are linked through the piston rod to realize switching between two working chambers through the setting of switching-over valve, thereby constitute the internal control formula structure, compact structure; the energy-saving valve is arranged at the air inlet P, and when the charged compressed air exceeds the set pressure of the energy-saving valve, the energy-saving valve is closed, so that the phenomenon of over-charging is avoided, the over-charged compressed air is saved, and the purpose of energy saving is achieved.

Drawings

FIG. 1 is a cross-sectional structural view of the present invention;

FIG. 2 is a cross-sectional structural view of the economizer valve of FIG. 1;

FIG. 3 is a state diagram of the present invention;

fig. 4 is a control schematic diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, the structure of the present invention is schematically illustrated,

wherein the reference numerals are: the device comprises an air inlet P, a working cavity A, a driving cavity A0, a material conveying cavity A1, a working cavity B, a driving cavity B0, a material conveying cavity B1, a pump body 1, a cavity A working port 1a, a cavity A material inlet and outlet port 1B, a cavity B working port 1c, a cavity B material inlet and outlet port 1d, a first diaphragm 2, a first pressing sheet 21, a second diaphragm 3, a second pressing sheet 31, a piston rod 4, a fixing screw 41, a reversing valve 5, an energy-saving valve 6, an air inlet P1, a working port 6a, a valve body 61, a control cavity 61a, a valve core 62, a push rod 63, a spring 64, an adjusting nut 65, an adjusting screw 66, a hand wheel 67, a front end cover 68, a boss 68a, a rear end cover 69, a first sealing ring 71, a second sealing ring 72, a third sealing ring 73, a fourth sealing ring 74.

As shown in figures 1 to 4 of the drawings,

an energy-saving internal control type pneumatic diaphragm pump comprises a pump body 1, wherein an air inlet P is formed in the pump body 1, a working cavity A and a working cavity B are correspondingly arranged on two sides of the pump body 1, a first diaphragm 2 is arranged in the working cavity A and is divided into a driving cavity A0 and a material conveying cavity A1, the driving cavity A0 is communicated with a working port 1a of the cavity A, a material conveying cavity A1 is communicated with a material inlet and outlet 1B of the cavity A, a second diaphragm 3 is arranged in the working cavity B and is divided into a driving cavity B0 and a material conveying cavity B1, a driving cavity B0 is communicated with a working port 1c of the cavity B, and a material conveying cavity B1 is communicated with a material inlet and outlet 1d of the cavity;

a piston rod 4 is connected between the first diaphragm 2 and the second diaphragm 3, and a reversing valve 5 is arranged between the air inlet P and the working ports 1a and 1c of the cavities A and B;

an energy-saving valve 6 is arranged at the position of the air inlet P, the energy-saving valve 6 comprises a valve body 61, an air inlet P1 and a working port 6a are arranged on the valve body 61, the working port 6a of the energy-saving valve 6 is communicated with the air inlet P of the pneumatic diaphragm pump, a valve core 62 is arranged between the air inlet P1 and the working port 6a, a mandril 63 is connected to the valve core 62, the mandril 63 abuts against a spring 64, and a control cavity 61a communicated with the working port 6a is further arranged in the valve body 61.

In the embodiment, the other end of the spring 64 abuts against an adjusting nut 65, an adjusting screw 66 is arranged in the center of the adjusting nut 65, and a hand wheel 67 is connected to the outer side of the adjusting screw 66.

In the embodiment, a front end cover 68 and a rear end cover 69 are respectively disposed at two ends of the valve body 61, and a boss 68a is protruded at the center of the front end cover 68.

In the embodiment, a first seal 71 is provided at the outlet of the working port 6 a.

In the embodiment, a second sealing ring 72 is disposed between the valve core 62 and the inner wall of the valve body 61.

In the embodiment, a third sealing ring 73 is arranged between the push rod 63 and the inner wall of the valve body 61.

In one embodiment, a fourth seal 74 is disposed between the front end cap 68 and the inner wall of the valve body 61.

In the embodiment, the valve body 61 is fixed to the pump body 1 by screws 8.

In the embodiment, the two sides of the middle part of the first membrane 2 are respectively provided with a first pressing sheet 21; in the embodiment, the second pressing pieces 31 are respectively arranged on two sides of the middle part of the second film 3.

In the embodiment, the first diaphragm 2 and the second diaphragm 3 are fixed to both ends of the piston rod 4 by fixing screws 41.

The working principle is as follows:

the utility model discloses an energy-conserving interior accuse formula pneumatic diaphragm pump adopts a two-position two-way formula pressure limiting valve as energy-conserving valve 6, adopts a two-position five-way valve as switching-over valve 5, and the case both ends of switching-over valve 5 can correspond respectively and stretch into to corresponding work intracavity.

As shown in fig. 1, the pneumatic diaphragm pump is provided with two variable-capacity working chambers, namely a working chamber a and a working chamber B, a first diaphragm 2 is arranged in the working chamber a to be separated into a driving chamber a0 and a material conveying chamber a1, the driving chamber a0 is communicated with a working port 1a of the chamber a, the material conveying chamber a1 is communicated with a feeding and discharging port 1B of the chamber a, a second diaphragm 3 is arranged in the working chamber B to be separated into a driving chamber B0 and a material conveying chamber B1, the driving chamber B0 is communicated with a working port 1c of the chamber B, and the material conveying chamber B1 is communicated with a feeding and discharging port 1d of the chamber B. Each variable-capacity working cavity is internally provided with a driving cavity and a material conveying cavity, the driving cavity is positioned on the inner side of the diaphragm, and the driving cavity is used for inputting compressed air as power for the diaphragm pump to work; the material conveying cavity is positioned on the outer side of the diaphragm and is used for conveying target fluids (paint, waste water and the like). When compressed air enters from the air inlet P and enters the driving cavity A0 through the reversing valve 5, the piston rod 4 moves leftwards, the volume of the material conveying cavity A1 is reduced, and target fluid is pumped out; meanwhile, the compressed air in the driving chamber B0 is discharged through the change valve 5, and the volume of the material conveying chamber B1 becomes large, and the target fluid is sucked. When the second diaphragm 3 in the working cavity B touches the reversing valve 5 and drives the valve core of the reversing valve 5 to move leftwards together, the reversing is realized. After the reversing valve 5 is reversed, compressed air enters the driving cavity B0 to push the piston rod 4 to move rightwards, and target fluid sucked in the material conveying cavity B1 is pumped out; meanwhile, the volume of the material conveying cavity A1 becomes larger, and the target fluid is sucked into the material conveying cavity A1. When the first diaphragm 2 in the working cavity A moves rightwards, the first diaphragm 2 touches the valve core of the reversing valve 5 and drives the valve core of the reversing valve 5 to move rightwards together, so that the reversing valve 5 reverses. The above processes are repeatedly alternated to realize the reciprocating motion of the pneumatic diaphragm pump.

As shown in fig. 3, when the pneumatic diaphragm pump is used for conveying a target fluid, the chamber a feed/discharge port 1B is connected with the material suction port through the check valve S1, the chamber a feed/discharge port 1B is connected with the material extrusion port through the check valve S3, the chamber B feed/discharge port 1d is connected with the material suction port through the check valve S2, and the chamber B feed/discharge port 1d is connected with the material extrusion port through the check valve S4. When the working cavity A sucks the target fluid, the working cavity B outputs the target fluid; conversely, when working chamber a outputs the target fluid, working chamber a outputs the target fluid. Specifically, when the target fluid is sucked into the working chamber a, the transported target fluid is sucked into the material transporting chamber a1 from the material suction port through the check valve S1, at this time, the check valve S2 and the check valve S3 are closed, the target fluid output from the working chamber B is in a high-pressure state, and the target fluid in the material transporting chamber B1 is transported to the material pressure outlet through the check valve S4. On the contrary, when the working chamber B sucks the target fluid, the conveyed target fluid is sucked into the material conveying chamber B1 from the material suction port through the check valve S2, at this time, the check valve S1 and the check valve S4 are closed, the target fluid output from the working chamber a is in a high-pressure state, and the target fluid in the material conveying chamber a1 is conveyed to the material pressure outlet through the check valve S3. The material pressure outlet is conveyed to a destination through an external pipeline.

In order to increase productivity, the pressure of the compressed air fed to the pneumatic diaphragm pump is generally adjusted to be much higher than the pressure required for the load, in order to save the compressed air in the overcharged portion. An energy-saving valve 6 is arranged at the air inlet P, the energy-saving valve 6 is fixed on the pneumatic diaphragm pump through a screw 8, and when the pneumatic diaphragm pump is installed, a working port 6a of the energy-saving valve 6 is communicated with the air inlet P of the pneumatic diaphragm pump; after the installation, the compressed air is opened, the hand wheel 67 is rotated to slowly adjust the set pressure of the energy-saving valve 6 until the complete reciprocating motion of the diaphragm pump occurs, and the position of the hand wheel 67 is locked, so that the energy-saving internal control type pneumatic diaphragm pump can start to work. A control chamber 61a communicating with the working port 6a is further provided in the valve body 61 of the energy saving valve 6, so that the pressure of the working port 6a is fed back to the spool 62 to be balanced with the spring force of the spring 64. When the pressure in the control chamber 61a is greater than the spring force, the valve core 62 moves to the right, the energy-saving valve 6 is closed (the pressure in the working chamber of the diaphragm pump is limited to the level set by the energy-saving valve 6), the passage of the compressed air from the air inlet P1 to the working port 6a is cut off, the air inlet of the air inlet P of the pneumatic diaphragm pump is also closed, the over-charging phenomenon is avoided, the compressed air of the over-charging part is saved, and the purpose of saving energy is achieved.

As shown in fig. 4, the working chamber a of the diaphragm pump is filled with air, the piston rod 4 moves leftwards, but the valve core of the reversing valve 5 is positioned at the right side, when the air pressure rises to the set pressure of the energy-saving valve 6, the energy-saving valve 6 is closed, and the compressed air stops entering the working chamber a; at this point, the piston rod 4 continues to move to the left up to the top of the stroke under the free thermal expansion of the compressed air in the working chamber a. Meanwhile, the second diaphragm 3 in the working cavity B touches the valve core of the reversing valve 5 to move leftwards to complete valve switching. After the reversing valve 5 is switched, the pressure of the control cavity 61a of the energy-saving valve 6 is reduced to zero, the energy-saving valve 6 is opened under the action of the spring 64, compressed air enters the working cavity B, and the piston rod 4 starts to move rightwards; the compressed air in the working chamber a is released to the atmosphere and the pressure in the working chamber a drops to zero. When the pressure of the working cavity B reaches the set pressure of the energy-saving valve 6, the energy-saving valve 6 is closed, and compressed air stops entering the working cavity B; at this point, the piston rod 4 continues to move to the right up to the top of the stroke under the free thermal expansion of the compressed air in the working chamber B. At this time, the first pressing sheet 21 in the working cavity A touches the valve core of the reversing valve 5 to move rightwards to complete valve switching, so that the diaphragm pump returns to the working cavity A to intake air, and the working cavity B exhausts air; thus reciprocating. And the overcharge is avoided and the energy conservation is realized through the action of the energy-saving valve 6.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The utility model provides an energy-conserving interior accuse formula pneumatic diaphragm pump, including the pump body (1), the pump body (1) on be provided with air inlet P, characterized by: the two sides of the pump body (1) are correspondingly provided with a working cavity A and a working cavity B, a first diaphragm (2) is arranged in the working cavity A to be divided into a driving cavity A0 and a material conveying cavity A1, the driving cavity A0 is communicated with a working port (1a) of the cavity A, the material conveying cavity A1 is communicated with a material inlet and outlet (1B) of the cavity A, a second diaphragm (3) is arranged in the working cavity B to be divided into a driving cavity B0 and a material conveying cavity B1, the driving cavity B0 is communicated with a working port (1c) of the cavity B, and the material conveying cavity B1 is communicated with a material inlet and outlet (1d) of the cavity B;

a piston rod (4) is connected between the first diaphragm (2) and the second diaphragm (3), and a reversing valve (5) is arranged between the air inlet P and the working ports (1a, 1c) of the cavity A and the cavity B;

the pneumatic diaphragm pump is characterized in that an energy-saving valve (6) is arranged at the position of the air inlet P, the energy-saving valve (6) comprises a valve body (61), an air inlet P1 and a working port (6a) are arranged on the valve body (61), the working port (6a) of the energy-saving valve (6) is communicated with the air inlet P of the pneumatic diaphragm pump, a valve core (62) is arranged between the air inlet P1 and the working port (6a), a mandril (63) is connected to the valve core (62), the mandril (63) is abutted to a spring (64), and a control cavity (61a) communicated with the working port (6a) is further arranged in the valve body (61).

2. The energy-saving internal control type pneumatic diaphragm pump of claim 1, which is characterized in that: the other end of the spring (64) is abutted against an adjusting nut (65), an adjusting screw rod (66) is arranged at the center of the adjusting nut (65), and a hand wheel (67) is connected to the outer side of the adjusting screw rod (66).

3. The energy-saving internal control type pneumatic diaphragm pump of claim 2, which is characterized in that: the two ends of the valve body (61) are respectively and correspondingly provided with a front end cover (68) and a rear end cover (69), and a boss (68a) is convexly arranged at the center of the front end cover (68).

4. An energy-saving internal control type pneumatic diaphragm pump according to claim 3, wherein: and a first sealing ring (71) is arranged at the outlet of the working port (6 a).

5. The energy-saving internal control type pneumatic diaphragm pump of claim 4, which is characterized in that: and a second sealing ring (72) is arranged between the valve core (62) and the inner wall of the valve body (61).

6. The energy-saving internal control type pneumatic diaphragm pump of claim 5, which is characterized in that: and a third sealing ring (73) is arranged between the ejector rod (63) and the inner wall of the valve body (61).

7. The energy-saving internal control type pneumatic diaphragm pump of claim 6, which is characterized in that: and a fourth sealing ring (74) is arranged between the front end cover (68) and the inner wall of the valve body (61).

8. The energy-saving internal control type pneumatic diaphragm pump of claim 7, which is characterized in that: the valve body (61) is fixed with the pump body (1) through a screw (8).

9. The energy-saving internal control type pneumatic diaphragm pump of claim 8, wherein: two sides of the middle part of the first membrane (2) are respectively provided with a first pressing sheet (21); and second pressing sheets (31) are respectively arranged on two sides of the middle part of the second membrane (3).

10. The energy-saving internal control type pneumatic diaphragm pump of claim 9, wherein: the first diaphragm (2) and the second diaphragm (3) are correspondingly fixed at two ends of the piston rod (4) through fixing screws (41).