CN217558516U

CN217558516U - Pneumatic double-diaphragm pump

Info

Publication number: CN217558516U
Application number: CN202221001987.5U
Authority: CN
Inventors: 张燕花
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-10-11
Anticipated expiration: 2032-04-27

Abstract

The utility model relates to a diaphragm pump technical field specifically is a pneumatic two diaphragm pumps, include the inlet pipe with first drive chamber intercommunication and with the discharging pipe of the top intercommunication of first drive chamber, the upper and lower both ends of first drive chamber are equipped with the check valve respectively, the second drive chamber seals and communicates between its inboard and the inlet pipe has the hose, be provided with sliding connection and sealed complex axostylus axostyle with it in the shaft hole, the both ends of axostylus axostyle are exposed and are fixed with the correspondence respectively from the both ends of body and locate first drive chamber, first diaphragm in the second drive chamber, the second diaphragm, first diaphragm, the edge of second diaphragm respectively with first drive chamber, the inner wall sealing connection of second drive chamber. The utility model discloses a hose, inlet pipe form a whole space with first drive chamber, second drive chamber intercommunication, increase air compression volume, and increase gas output pressure provides bigger suction in order to realize the transport to dense fluid for the material fluid.

Description

Pneumatic double-diaphragm pump

Technical Field

The utility model relates to a diaphragm pumping technical field specifically is a pneumatic two diaphragm pumping.

Background

The existing pneumatic double-diaphragm pump mainly comprises a body, a driving shaft is arranged in the body, two ends of the driving shaft are respectively provided with a diaphragm piece, a driving chamber and a material chamber are respectively formed on the inner side and the outer side of each diaphragm piece, the material chambers are connected with a feeding pipe and a discharging pipe, the body is also provided with an air inlet reversing unit which can be connected with an air inlet source and guides the air input by the air inlet source to the driving chambers, wherein the air inlet reversing unit can slidably switch the air inlet direction to ensure that the air can only flow to one of the driving chambers at the same time, the body is also provided with an ejector pin unit, the ejector pins are respectively arranged at two ends of the driving shaft and can control the air inlet reversing unit to reverse after being contacted with the driving shaft, therefore, the diaphragm pieces can be driven to elastically deform by the bidirectional reciprocating movement of the driving shaft, so that the external materials are firstly pumped into the material chambers and then sent out, and the purpose of conveying the materials is achieved.

However, for some thick fluids such as slurry, etc., the pumping output pressure is insufficient due to the large pressure loss during the transportation process, so that the fluid cannot be delivered, and therefore, further improvement on the existing diaphragm pump is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

A pneumatic double-diaphragm pump comprises a body at the center, wherein a shaft hole which transversely penetrates through the body is formed in the center of the body, a first driving chamber and a second driving chamber which are communicated with the shaft hole are fixedly connected to two opposite sides of the body respectively, a feeding pipe communicated with the first driving chamber and a discharging pipe communicated with the top of the first driving chamber are further included, check valves are arranged at the upper end and the lower end of the first driving chamber respectively, the second driving chamber is closed, a hose is communicated between the inner side of the second driving chamber and the feeding pipe, a shaft rod which is in sliding connection and sealing fit with the shaft rod is arranged in the shaft hole, two ends of the shaft rod are exposed from two ends of the body and are respectively and vertically fixed with a first diaphragm and a second diaphragm which are correspondingly arranged in the first driving chamber and the second driving chamber, and edges of the first diaphragm and the second diaphragm are respectively and hermetically connected with the inner walls of the first driving chamber and the second driving chamber;

the top of the body is provided with a first air chamber, a second air chamber and a third air chamber, the body is externally provided with an air inlet and an air outlet, a first channel for communicating the air inlet and the first air chamber is arranged between the air inlet and the first air chamber, a lug which is flush with the edge of the top of the first air chamber is arranged in the first air chamber, the lug is provided with a row of first air holes communicated with the shaft hole, a first communicating hole and a second communicating hole are respectively arranged on two sides of the row of first air holes on the lug, a first air flow channel for communicating the first communicating hole with the first driving chamber and a second air flow channel for communicating the second communicating hole with the second driving chamber are arranged in the body, a first air groove communicated with the first air flow channel and a second air groove communicated with the second air flow channel are also arranged in the body, a second air hole is communicated between the first air groove and the second air chamber, and a third air hole is communicated between the second air groove and the third air chamber;

the top of the body is fixedly provided with a sequence valve, the bottom center of the sequence valve is provided with an air cavity, an in-valve sliding block which enables the first air chamber to be communicated with one of the first communicating hole and the second communicating hole is arranged in the air cavity, and the air outlet is arranged at the bottom of the body and communicated with the shaft hole.

Furthermore, a gasket is arranged between the lug and the in-valve sliding block, an air inlet valve hole for communicating the first air chamber with the air cavity, a first valve hole for communicating the first air hole with the air cavity, a second valve hole for communicating the second air hole with the air cavity, and a third valve hole for communicating the third air hole with the air cavity are arranged on the gasket, a first pressure chamber and a second pressure chamber are respectively arranged on two sides of the air cavity in the sequence valve, a push rod is arranged in the sequence valve, an arc-shaped notch is arranged at the top of the in-valve sliding block, a first pressure piston and a second pressure piston which are in sliding and sealing connection with the first pressure chamber and the second pressure chamber are respectively arranged on two sides of the in-valve sliding block through the notch, a first pressure output hole for communicating the first pressure chamber with the second air chamber and a second pressure output hole for communicating the second pressure chamber with the third air chamber are respectively arranged on the two sides of the in-valve sliding block, and the output pressure difference of the first pressure output hole and the second pressure output hole pushes the push rod to selectively communicate the first air chamber with the second communication hole.

Furthermore, a groove is formed at the bottom of the sliding block in the valve, so that the first air hole is selected from the first communicating hole and the second communicating hole to be communicated.

Furthermore, the upper end and the lower end of the first driving chamber are respectively provided with a check valve.

Furthermore, the first driving chamber and the second driving chamber respectively consist of a middle cover fixedly connected with the body and an outer cover fixedly connected with the middle cover, and the edges of the first diaphragm and the second diaphragm are respectively clamped by the corresponding middle cover and the corresponding outer cover to form a sealing space.

Furthermore, a first pressure relief hole communicated with the first air groove and a second pressure relief hole communicated with the second air groove are formed in the body, ejector pin valves which are abutted against the bottom walls of the first air groove and the second air groove and respectively correspondingly control the on-off of the first air groove and the second air hole or the second air groove and the third air hole are respectively installed in the first air groove and the second air groove, steel sheets clamping the first diaphragm and the second diaphragm are respectively and fixedly installed at two ends of the shaft rod, and an ejector pin of the ejector pin valve is abutted against the steel sheets.

Furthermore, a silencer is arranged on the air outlet.

Compared with the prior art, the utility model discloses the beneficial effect who gains does: the utility model discloses a hose, inlet pipe form a whole space with first drive chamber, second drive chamber intercommunication, and increase air compression volume, increase gas output pressure provides bigger suction in order to realize the transport to dense fluid for the material fluid.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is another schematic structural diagram of the present invention.

Fig. 3 is a schematic view of the exploded structure of the present invention.

Fig. 4 is a schematic structural view of the middle body of the present invention.

Fig. 5 is a partially enlarged view of a point a in fig. 4.

Fig. 6 is another schematic structural view of the middle body of the present invention.

Fig. 7 is another schematic structural diagram of the seed body of the present invention.

Fig. 8 is a schematic structural view of the middle gasket of the present invention.

Fig. 9 is a schematic structural view of the middle-top needle valve of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but 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.

Referring to fig. 1 to 9, a pneumatic double diaphragm pump includes a central body 1, a shaft hole 11 is formed in the center of the body 1, a first driving chamber 2 and a second driving chamber 3 communicated with the shaft hole 11 are fixedly connected to two opposite sides of the body 1, respectively, a feeding pipe 4 communicated with the first driving chamber 2 and a discharging pipe 5 communicated with the top of the first driving chamber 2 are further included, check valves 201 are respectively disposed at the upper and lower ends of the first driving chamber 2, the second driving chamber 3 is closed, a hose 6 is communicated between the inner side of the second driving chamber 3 and the feeding pipe 4, a shaft rod 7 slidably connected with the shaft hole 11 and hermetically engaged with the shaft rod 7 is disposed in the shaft hole 11, two ends of the shaft rod 7 are exposed from two ends of the body 1 and are respectively and vertically fixed with a first diaphragm 71 and a second diaphragm 72 correspondingly disposed in the first driving chamber 2 and the second driving chamber 3, and edges of the first diaphragm 71 and the second diaphragm 72 are respectively hermetically connected with the inner walls of the first driving chamber 2 and the second driving chamber 3;

the top of the body 1 is provided with a first air chamber 120, a second air chamber 130 and a third air chamber 140, the body 1 is externally provided with an air inlet 15 and an air outlet 16, a first channel 121 for communicating the air inlet 15 and the first air chamber 120 is arranged between the air inlet 15 and the first air chamber 120, the first air chamber 120 is internally provided with a lug 122 which is level with the top edge of the first air chamber 120, the lug 122 is provided with a row of first air holes 123 communicated with the shaft hole 11, the lug 122 is respectively provided with a first communicating hole 124 and a second communicating hole 125 at two sides of the row of first air holes 123, the body 1 is provided with a first air channel 131 for communicating the first communicating hole 124 with the first driving chamber 2 and a second air channel 141 for communicating the second communicating hole 125 with the second driving chamber 3, the body 1 is also provided with a first air groove 132 communicated with the first air channel 131 and a second air groove 142 communicated with the second air channel 141, the first air groove 132 and the second air chamber 130 are communicated with the second air chamber 133, and the second air groove 142 and the third air chamber 140 are communicated with the third air hole 143;

a sequence valve 8 is fixedly arranged at the top of the body 1, an air cavity 81 is arranged at the center of the bottom of the sequence valve 8, an in-valve sliding block 82 which enables the first air chamber 120 to be communicated with one of the first communication hole 124 and the second communication hole 125 is arranged in the air cavity 81, and the air outlet 16 is arranged at the bottom of the body 1 and communicated with the shaft hole 11.

The utility model discloses a hose 6, inlet pipe 4 form a whole space with first drive chamber 2, the 3 intercommunications of second drive chamber, increase air compression volume, and increase gas output pressure provides bigger suction in order to realize the transport to dense fluid for the material fluid. Specifically, the utility model discloses a theory of operation as follows:

1) The in-valve slider 82 shields the first communicating hole 124, the first air hole 123 to communicate the second communicating hole 125 with the first air chamber 120 through the air chamber 81;

2) Compressed air is input into the air inlet 15, and then enters the second driving chamber 3 after sequentially passing through the first channel 121, the first air chamber 120, the air chamber 81, the second communicating hole 125 and the second air flow channel 141 to push the second membrane 72 to move outwards, and negative pressure is formed on the inner side of the second membrane 72;

3) The second membrane 72 drives the first membrane 71 to move inwards through the shaft rod 7, so that negative pressure is formed on the outer side of the second membrane 72;

4) The fluid enters the first driving chamber 2 under the action of negative pressure;

5) The valve inner slide block 82 is pulled to shield the second communicating hole 125 and the first air hole 123 to enable the first communicating hole 124 to be communicated with the first air chamber 120 through the air chamber 81, and the compressed air cylinder enters the first driving chamber 2 after passing through the first channel 121, the first air chamber 120, the air chamber 81, the first communicating hole 124 and the first air flow channel 131 in sequence;

6) The first membrane 71 moves outwards under the action of the compressed gas to extrude the fluid into the discharge pipe 5;

the continuous delivery of the fluid can be realized by repeating the steps.

In addition, a groove 821 is formed at the bottom of the in-valve slider 82 to allow the first air hole 123 to be selectively communicated with the first communication hole 124 and the second communication hole 125. When the second communication hole 125 communicates with the first air chamber 120, the first communication hole 124 communicates with the first air hole 123 through the groove 821, so that the first driving chamber 2, the first air flow passage 131, the first communication hole 124, the first air hole 123, the shaft hole 11, and the air outlet 16 form an air path for conveniently discharging air, and vice versa.

Furthermore, a gasket 83 is provided between the bump 122 and the valve inner slide 82, the gasket 83 is provided with an air inlet valve hole 831 for communicating the first air chamber 120 with the air chamber 81, a first valve hole 832 for communicating the first air hole 123 with the air chamber 81, a second valve hole 833 for communicating the second air hole 133 with the air chamber 81, and a third valve hole 834 for communicating the third air hole 143 with the air chamber 81, the sequence valve 8 is provided with a first pressure chamber 813 and a second pressure chamber 814 on both sides of the air chamber 81, a push rod 810 is installed in the sequence valve 8, the top of the valve inner slide 82 is provided with an arc-shaped notch, the notch is installed on the valve inner slide 82 and is provided with a first pressure piston 823 and a second pressure piston 824 which are slidably and hermetically connected with the first pressure chamber 813 and the second pressure chamber 814 on both sides of the valve inner slide 82, the sequence valve 8 is provided with a first pressure output hole 84 for communicating the first pressure chamber 813 with the second air chamber 130, a second pressure output hole 85 for communicating the second pressure chamber 814 with the third air chamber 140, and a first pressure output hole 85 for driving the push rod 125 to drive the first pressure output hole 85 and the second pressure output hole 125 for communicating the first pressure output slide 82.

Furthermore, the first driving chamber 2 and the second driving chamber 3 are respectively composed of a middle cover fixedly connected with the body 1 and an outer cover fixedly connected with the middle cover, and the edges of the first diaphragm 71 and the second diaphragm 72 are respectively clamped by the corresponding middle cover and the corresponding outer cover to form a sealed space.

Furthermore, a first pressure relief hole 301 communicated with the first air groove 132 and a second pressure relief hole 401 communicated with the second air groove 142 are arranged on the body 1, the first air groove 132 and the second air groove 142 are respectively provided with an ejector pin valve 9 which is abutted against the bottom wall thereof and respectively controls the on-off of the first air groove 132 and the second air hole 133 or the second air groove 142 and the third air hole 143 correspondingly, two ends of the shaft lever 7 are respectively fixedly provided with a steel sheet 10 for clamping the first diaphragm 71 and the second diaphragm 72, and an ejector pin of the ejector pin valve 9 is abutted against the steel sheet 10. Specifically, as shown in fig. 9, the ejector pin valve 9 of the present invention adopts a two-way air hole design, when the first membrane 71 moves inward, the gas inside the first membrane 71 is discharged through the first pressure release hole 301, the steel sheet 10 on the first membrane 71 presses the ejector pin of the ejector pin valve 9 to compress until the ejector pin valve 9 switches on the first air slot 132 and the second air hole 133, the first pressure release hole 301 is closed, the other side, the ejector pin valve 9 cuts off the second air slot 142 and the second air hole 133, the second pressure release hole 401 is switched on, the compressed air enters the second air slot 130 through the second air hole 133 and enters the first pressure output hole 84, the first pressure piston 823 is pushed to switch the position of the inner slider 82, and vice versa.

Further, a silencer 161 is mounted on the air outlet 16.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The utility model provides a pneumatic two diaphragm pumps, includes the body at center, and the center of body is equipped with the shaft hole that transversely runs through it, and the first drive chamber, the second drive chamber of the double-phase offside difference fixedly connected with and shaft hole intercommunication of body, its characterized in that: the device comprises a body, a first driving chamber and a second driving chamber, and is characterized by further comprising a feeding pipe communicated with the first driving chamber and a discharging pipe communicated with the top of the first driving chamber, wherein check valves are respectively arranged at the upper end and the lower end of the first driving chamber, the second driving chamber is closed, a hose is communicated between the inner side of the second driving chamber and the feeding pipe, a shaft rod which is in sliding connection with the shaft rod and in sealing fit with the shaft rod is arranged in the shaft hole, two ends of the shaft rod are exposed out of two ends of the body and are respectively and vertically fixed with a first membrane and a second membrane which are correspondingly arranged in the first driving chamber and the second driving chamber, and the edges of the first membrane and the second membrane are respectively and hermetically connected with the inner walls of the first driving chamber and the second driving chamber;

the top of the body is fixedly provided with a sequence valve, the center of the bottom of the sequence valve is provided with an air cavity, an inner valve sliding block which enables the first air chamber to be communicated in the first communicating hole and the second communicating hole is arranged in the air cavity, and the air outlet is arranged at the bottom of the body and communicated with the shaft hole.

2. The pneumatic double-diaphragm pump according to claim 1, wherein a gasket is provided between the projection and the valve inner slide, the gasket is provided with an air inlet valve hole for communicating the first air chamber with the air chamber, a first valve hole for communicating the first air hole with the air chamber, a second valve hole for communicating the second air hole with the air chamber, and a third valve hole for communicating the third air hole with the air chamber, the sequence valve is provided with a first pressure chamber and a second pressure chamber on both sides of the air chamber, a push rod is installed in the sequence valve, an arc-shaped notch is provided on a top of the valve inner slide, the notch is installed on the valve inner slide, and a first pressure piston and a second pressure piston which are slidably and sealingly connected with the first pressure chamber and the second pressure chamber are provided on both sides of the valve inner slide, the sequence valve is provided with a first pressure output hole for communicating the first pressure chamber with the second air chamber, and a second pressure output hole for communicating the second pressure chamber with the third air chamber, and an output pressure difference of the first pressure output hole and the push rod drives the valve inner slide to communicate the first air chamber with the first communication hole.

3. A pneumatic double diaphragm pump according to claim 1 or 2, wherein the bottom of the slider in the valve is formed with a groove to allow the first air hole to communicate with either the first communication hole or the second communication hole.

4. The pneumatic dual diaphragm pump as claimed in claim 1, wherein the first driving chamber and the second driving chamber are respectively formed by a middle cap fixedly connected to the body and an outer cap fixedly connected to the middle cap, and edges of the first diaphragm and the second diaphragm are respectively clamped by the corresponding middle cap and the corresponding outer cap to form a sealed space.

5. The pneumatic double-diaphragm pump according to claim 4, wherein the body has a first pressure-releasing hole communicating with the first air groove and a second pressure-releasing hole communicating with the second air groove, the first air groove and the second air groove are respectively provided with a thimble valve which abuts against the bottom wall thereof and respectively controls the on-off of the first air groove and the second air hole or the second air groove and the third air hole, two ends of the shaft rod are respectively fixedly provided with a steel sheet for clamping the first diaphragm and the second diaphragm, and the thimble of the thimble valve abuts against the steel sheet.

6. A pneumatic dual diaphragm pump according to claim 1, wherein the outlet port is fitted with a silencer.