CN117967555A - Pneumatic diaphragm pump - Google Patents

Abstract

The invention relates to the technical field of diaphragm pumps, and discloses a pneumatic diaphragm pump. The left pump body and the right pump body of the pneumatic diaphragm pump can be independently operated respectively through the arrangement of the liquid inlet pipeline and the liquid outlet pipeline which are respectively communicated with the left pump body and the right pump body under the common limitation of the left transmission mechanism and the right transmission mechanism, and in the same time, the range of the lift generated by the common action of the left pump body and the right pump body can be matched with the range of the lift actually required, so that the difficulty in configuring the range of the lift can be reduced, and the effect of adapting the range of the lift in a larger range can be achieved.

Description

Pneumatic diaphragm pump

Technical Field

The invention relates to the technical field of diaphragm pumps, in particular to a pneumatic diaphragm pump.

Background

The pneumatic diaphragm pump uses high-pressure air as a force source, and converts pressure potential energy into kinetic energy of reciprocating motion of the diaphragm through the extrusion action of the high-pressure air on the diaphragm in the pump. Due to the good safety characteristic, the process medium is wide, so that the application environment is diversified, and the use occasions are gradually increased. The pneumatic diaphragm pump is generally composed of a pump shell, a diaphragm, an air distributing valve, a connecting rod and the like. The reciprocating deformation of the diaphragm causes the volume change of the working chamber, and the pneumatic diaphragm pump is a special volumetric pump, similar to the working principle of a plunger pump. The pneumatic diaphragm pump is provided with two liquid chambers and two gas chambers, which are also called working chambers and pneumatic chambers according to functions, and are in symmetrical structures. An elastic diaphragm is arranged between each air chamber and each liquid chamber, and 2 diaphragm sheets are connected through a connecting rod, so that the two diaphragm sheets can synchronously move. The shell of the diaphragm pump forms a closed space, is a main moving part of the pump body, and the process medium obtains kinetic energy in the closed space and mainly consists of a diaphragm, a ball valve and a connecting rod; the air distribution system is a power source for providing work to the pump body, is a key component for converting the pressure potential energy of compressed air into kinetic energy, and consists of an air distribution chamber, an air distribution valve and a muffler; the internal guiding valve pressurizes the valve cores of the distributing valve in turn, pushes the valve cores to move, and empties the other end.

When the conventional pneumatic diaphragm pump is used, the inlet and outlet driving of compressed gas can be controlled through the electromagnetic valve, so that the flow of a medium to be regulated can be changed according to a control signal of a regulator or a computer, and the parameter to be regulated is maintained in a required range, thereby achieving the automation of the production process.

In addition, the diaphragm sheet has good flexibility and better corrosion resistance, and is usually made of polytetrafluoroethylene, rubber and other materials. The pan bottom-like parts with mesh on both sides of the diaphragm are provided to prevent excessive deformation of the diaphragm locally, commonly referred to as diaphragm restrainers. The pneumatic diaphragm pump has good sealing performance, can easily achieve leak-free operation, and can be used for conveying corrosive liquids such as acid, alkali, salt and the like and high-viscosity liquids.

The prior pneumatic diaphragm pump has the advantages that the power source of the prior pneumatic diaphragm pump is from compressed air, but the source of the compressed air is wider, the cost is generally saved, the air of a single air source (air type) is not adopted, the compressed air of the prior pneumatic diaphragm pump directly pushes the diaphragm to apply work, the diaphragm is in contact with the compressed air, the diaphragm is easy to run in an indefinite environment and lose effectiveness, the prior pneumatic diaphragm pump is a driving stroke which fully utilizes the compressed air and is generally arranged into a structure of two pump chambers, but the structure leads to narrow pump body lift range, the pump body flow requirement is difficult to adapt to variable, the required specification number of the prior pneumatic diaphragm pump is large, and the prior pneumatic diaphragm pump is difficult to be effectively configured at working sites in different lift requirement ranges.

For the problems in the related art, no effective solution has been proposed at present.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a pneumatic diaphragm pump.

In order to solve the technical problems, the invention provides the following technical scheme:

The pneumatic diaphragm pump comprises a pneumatic mechanism, wherein a left pump body and a right pump body are respectively arranged on two sides of the pneumatic mechanism, the pneumatic mechanism is in power transmission with the left pump body through a left transmission mechanism, and the pneumatic mechanism is in power transmission with the right pump body through a right transmission mechanism; the pneumatic mechanism is connected with an air source, and driven by the air source, the pneumatic mechanism can reciprocate to output power to the left transmission mechanism and the right transmission mechanism respectively; in the same time, the power transmission between the left transmission mechanism and the left pump body and the power transmission between the right transmission mechanism and the right pump body are disconnected, and only one power transmission can be disconnected; the left pump body and the right pump body are communicated with a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline comprises a central liquid inlet, a left bypass liquid inlet and a right bypass liquid inlet, and the liquid outlet pipeline comprises a central liquid outlet, a left bypass liquid outlet and a right bypass liquid outlet; the liquid entering from the central liquid inlet can enter the left pump body and the right pump body respectively and can be discharged from the central liquid outlet, the left bypass liquid outlet and the right bypass liquid outlet; the liquid entering from the left bypass liquid inlet can only pass through the left pump body and is discharged from the central liquid outlet and the left bypass liquid outlet; the liquid entering from the right bypass liquid inlet can only pass through the right pump body and is discharged from the central liquid outlet and the right bypass liquid outlet.

Preferably, the pneumatic mechanism comprises a reversing air chamber, the reversing air chamber comprises a left air chamber and a right air chamber, an air chamber channel is arranged between the left air chamber and the right air chamber, a driving disc is slidably arranged in the air chamber channel, and the driving disc can separate the left air chamber from the right air chamber; the left air chamber and the right air chamber are respectively connected with an air source through electromagnetic valves, and when the air source respectively supplies air to the left air chamber and the right air chamber, and when the air pressure inside the left air chamber and the air pressure inside the right air chamber are uneven, the driving disc can slide inside the air chamber channel to balance the air pressure inside the left air chamber and the right air chamber.

Preferably, the pneumatic mechanism further comprises a driving connecting rod, wherein the center of the driving connecting rod is fixed with the driving disc, and magnetic transmission discs are respectively arranged at two ends of the driving connecting rod; the left transmission mechanism comprises a left transmission rod, a left electromagnetic driven disc is arranged at one end, close to the driving connecting rod, of the left transmission rod, and one end, close to the left pump body, of the left transmission rod is fixedly connected with a left diaphragm in the left pump body; the right transmission mechanism comprises a right transmission rod, a right electromagnetic driven disc is arranged at one end, close to the driving connecting rod, of the right transmission rod, and one end, close to the right pump body, of the right transmission rod is fixedly connected with a right diaphragm inside the right pump body.

Preferably, the left transmission rod, the left diaphragm and the magnetic transmission disc of the driving connecting rod, which are close to one end of the left transmission rod, are positioned in a space separated from the left air chamber; the right transmission rod, the right diaphragm and the magnetic transmission disc of the end, close to the right transmission rod, of the driving connecting rod are located in a space separated from the right air chamber.

Preferably, the left electromagnetic driven disc and the right electromagnetic driven disc can generate repulsive force with the magnetic transmission discs arranged at two ends of the driving connecting rod respectively after being electrified respectively, so that transmission with the driving connecting rod is disconnected; the left electromagnetic driven disc and the right electromagnetic driven disc are connected with a two-way switch, and when the two-way switch is in any one of the closed states, only one power transmission can be disconnected between the left electromagnetic driven disc and the right electromagnetic driven disc.

Preferably, the left pump body further comprises a left pump chamber, and the left transmission rod can drive the left diaphragm to move in the process of moving along with the driving connecting rod, so that the volume of the left pump chamber is changed; the right pump body further comprises a right pump chamber, and the right transmission rod can drive the right diaphragm to move in the moving process of the driving connecting rod, so that the volume of the right pump chamber is changed.

Preferably, the liquid inlet pipeline is internally provided with one-way valves respectively positioned at two sides of the central liquid inlet, and the opening directions of the one-way valves in the liquid inlet pipeline are respectively the directions pointing to the left bypass liquid inlet and the right bypass liquid inlet from the central liquid inlet respectively; the liquid inlet pipeline is further provided with a plurality of sealing plugs, and the plurality of sealing plugs can be used for sealing any central liquid inlet, left bypass liquid inlet and right bypass liquid inlet which are not needed to be used respectively.

Preferably, the liquid discharge pipeline is internally provided with one-way valves respectively at two sides of the central liquid discharge port, and the opening directions of the one-way valves in the liquid discharge pipeline are respectively from the left bypass liquid discharge port and the right bypass liquid discharge port to the direction of the central liquid discharge port; the liquid draining pipeline is further provided with a plurality of sealing plugs, and the plurality of sealing plugs can be used for sealing any central liquid draining port, left bypass liquid draining port and right bypass liquid draining port which are not needed to be used respectively.

Preferably, the check valve comprises a valve body and a valve core, a through hole is formed in the center of the valve body in a penetrating mode, the valve core is connected with the inner wall of the valve body through a torsion spring, and when the valve core overcomes the elastic force of the torsion spring and rotates to the side far away from the through hole, the through hole can be opened.

Preferably, the sealing plug comprises a plug head, a threaded connection column is arranged on one side of the plug head, a sealing rubber ring is arranged at one end, close to the plug head, of the threaded connection column, and the sealing rubber ring is used for sealing a connection part of the sealing plug.

Compared with the prior art, the invention provides the pneumatic diaphragm pump, which has the following beneficial effects:

1. The left pump body and the right pump body of the pneumatic diaphragm pump can be independently operated respectively through the arrangement of the liquid inlet pipeline and the liquid outlet pipeline which are communicated with the left pump body and the right pump body respectively, so that the lift range of the left pump body or the right pump body can be matched with the lift range of actual requirements, the lift range generated by the combined action of the left pump body and the right pump body can also be matched with the lift range of the actual requirements, the difficulty in configuring the lift range can be reduced, and the effect of adapting the lift range of a larger range can be achieved.

2. In the pneumatic diaphragm pump, a left transmission rod, a left diaphragm and a magnetic transmission disc of one end of a driving connecting rod, which is close to the left transmission rod, are positioned in a space separated from a left air chamber; the magnetic transmission disc, which is close to one end of the right transmission rod, of the right diaphragm and the driving connecting rod is positioned in a space separated from the right air chamber, so that when the magnetic transmission disc is used, the left diaphragm is separated from the left air chamber, the right diaphragm is separated from the right air chamber, the left diaphragm and the right diaphragm can be prevented from being contacted with the outside, the elastic deformation of the pumping operation process can be executed under a pre-prepared closed environment, the aging acceleration caused by the contact of the left diaphragm and the right diaphragm with the outside is effectively avoided, and the service life of the left diaphragm and the right diaphragm is guaranteed.

3. When the two-way switch is in any one of the closed states, only one power transmission can be disconnected between the left electromagnetic driven disc and the right electromagnetic driven disc, and when the left electromagnetic driven disc and the right electromagnetic driven disc are pushed to the farthest positions from the corresponding magnetic transmission discs, the magnetic transmission discs move to the largest positions where the reciprocating motion is far away from the central position, and the distance between the magnetic transmission discs is too large, so that the magnetic interference can not drive the left electromagnetic driven disc and the right electromagnetic driven disc to move any more; therefore, the pumping operation of the pneumatic diaphragm pump can be effectively executed when the power transmission between the left transmission mechanism and the left pump body and the power transmission between the right transmission mechanism and the right pump body are disconnected at the same time.

Drawings

FIG. 1 is a schematic perspective view of an air-operated diaphragm pump according to the present invention;

FIG. 2 is a schematic diagram showing a pneumatic diaphragm pump according to a second embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an air operated diaphragm pump of the present invention;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3 in accordance with the present invention;

FIG. 5 is an enlarged schematic view of portion B of FIG. 3 in accordance with the present invention;

FIG. 6 is a schematic view of the internal flow of an air operated diaphragm pump according to the present invention;

FIG. 7 is a schematic perspective view of a check valve according to the present invention;

FIG. 8 is a schematic cross-sectional view of a check valve of the present invention;

Fig. 9 is a schematic perspective view of a sealing plug of the present invention.

In the figure: 1. a pneumatic mechanism; 11. a reversing air chamber; 111. a left air chamber; 112. a right air chamber; 113. a plenum channel; 12. a drive plate; 13. a drive link; 131. a magnetic drive disk; 2. a left pump body; 21. a left diaphragm; 22. a left pump chamber; 3. a right pump body; 31. a right diaphragm; 32. a right pump chamber; 4. a left transmission mechanism; 41. a left transmission rod; 411. a left electromagnetic driven disc; 5. a right transmission mechanism; 51. a right transmission rod; 511. a right electromagnetic driven disc; 6. a liquid inlet pipe; 61. a central liquid inlet; 62. a left bypass liquid inlet; 63. a right bypass liquid inlet; 7. a liquid discharge pipe; 71. a central drain port; 72. a left bypass drain port; 73. a right bypass drain; 8. a one-way valve; 81. a valve body; 811. a through hole; 82. a valve core; 9. a sealing plug; 91. a plug head; 92. a threaded connection post; 93. and (5) sealing the rubber ring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As described in the background art, the present application provides an air-operated diaphragm pump for solving the above technical problems.

Referring to fig. 1-9, a pneumatic diaphragm pump comprises a pneumatic mechanism 1, wherein a left pump body 2 and a right pump body 3 are respectively arranged on two sides of the pneumatic mechanism 1, the pneumatic mechanism 1 is in power transmission with the left pump body 2 through a left transmission mechanism 4, and the pneumatic mechanism 1 is in power transmission with the right pump body 3 through a right transmission mechanism 5; the pneumatic mechanism 1 is connected with an air source, and under the drive of the air source, the pneumatic mechanism 1 can reciprocate to output power to the left transmission mechanism 4 and the right transmission mechanism 5 respectively; in the same time, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 are disconnected, and only one power transmission can be disconnected; the left pump body 2 and the right pump body 3 are both communicated with a liquid inlet pipeline 6 and a liquid outlet pipeline 7, the liquid inlet pipeline 6 comprises a central liquid inlet 61, a left bypass liquid inlet 62 and a right bypass liquid inlet 63, and the liquid outlet pipeline 7 comprises a central liquid outlet 71, a left bypass liquid outlet 72 and a right bypass liquid outlet 73; liquid entering from the central liquid inlet 61 can enter the left pump body 2 and the right pump body 3 respectively, and can be discharged from the central liquid outlet 71, the left bypass liquid outlet 72 and the right bypass liquid outlet 73; the liquid entering from the left bypass liquid inlet 62 can only pass through the left pump body 2 and be discharged from the center liquid discharge port 71 and the left bypass liquid discharge port 72; the liquid entering from the right bypass intake port 63 can only pass through the right pump body 3 and be discharged from the center drain port 71 and the right bypass drain port 73.

When the pneumatic diaphragm pump is used, firstly, a pneumatic diaphragm pump with a proper lift range is selected according to actual needs, in the embodiment, because the left pump body 2 and the right pump body 3 of the pneumatic diaphragm pump can be under the common limitation of the left transmission mechanism 4 and the right transmission mechanism 5, in the same time, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 are disconnected and only one power transmission can be disconnected, and through the arrangement of a liquid inlet pipeline 6 and a liquid outlet pipeline 7 which are respectively communicated with the left pump body 2 and the right pump body 3, the left pump body 2 and the right pump body 3 of the pneumatic diaphragm pump can respectively and independently operate, the lift range of the left pump body 2 or the right pump body 3 can be matched with the lift range which is actually needed, and the lift range which is generated by the combined action of the left pump body 2 and the right pump body 3 can also be matched with the lift range which is actually needed can be adopted, and the difficulty of configuring the lift range can be reduced, so that the effect of adapting the lift range with a larger range can be achieved;

The pneumatic diaphragm pump has the following modes of use, and the modes of use are different in that the central liquid inlet 61, the left bypass liquid inlet 62 and the right bypass liquid inlet 63 of the liquid inlet pipeline 6 are respectively blocked or communicated, and the central liquid outlet 71, the left bypass liquid outlet 72 and the right bypass liquid outlet 73 of the liquid outlet pipeline 7 are respectively blocked or communicated (hereinafter, the central liquid inlet 61, the left bypass liquid inlet 62 and the right bypass liquid inlet 63, the central liquid outlet 71, the left bypass liquid outlet 72 and the right bypass liquid outlet 73 are collectively called an interface when not explicitly indicated):

First kind: the central liquid inlet 61 and the central liquid outlet 71 are respectively opened to seal other interfaces, at the moment, the left pump body 2 and the right pump body 3 are used for conveying the same liquid, and under the driving of an air source, the pneumatic mechanism 1 can reciprocate to respectively output power to the left transmission mechanism 4 and the right transmission mechanism 5; at this time, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 are both in a closed state (a power transmission state corresponding to an open state, hereinafter collectively referred to as a closed state, i.e., a state in which the power transmission is normally performed); at this time, the liquid entering from the central liquid inlet 61 can enter the left pump body 2 and the right pump body 3 respectively and can be discharged from the central liquid outlet 71, and at this time, the maximum value and the minimum value of the lift of the pneumatic diaphragm pump are overlapped between the left pump body 2 and the right pump body 3;

Second kind: the central liquid inlet 61, the left bypass liquid outlet 72 and the right bypass liquid outlet 73 are respectively opened to block other interfaces, at the moment, the left pump body 2 and the right pump body 3 are used for conveying the same liquid, and under the driving of an air source, the pneumatic mechanism 1 can reciprocate to respectively output power to the left transmission mechanism 4 and the right transmission mechanism 5; at this time, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 are both in a closed state; at this time, the liquid entering from the central liquid inlet 61 can enter the left pump body 2 and the right pump body 3 respectively and can be discharged from the left bypass liquid outlet 72 and the right bypass liquid outlet 73 respectively, at this time, the left pump body 2 and the right pump body 3 can be respectively supplied to two output directions, and at this time, the maximum value and the minimum value of the lift of the pneumatic diaphragm pump are calculated for the left pump body 2 and the right pump body 3 respectively;

third kind: the left bypass liquid inlet 62, the right bypass liquid inlet 63, the left bypass liquid outlet 72 and the right bypass liquid outlet 73 are respectively opened to seal other interfaces, at the moment, the left pump body 2 and the right pump body 3 can convey different liquids, at the moment, in the same time, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 can be disconnected, and the air source can stop inputting to the air source of the air-driven mechanism 1; at this time, any one of the left pump body 2 and the right pump body 3 can be controlled to work, and two different types of liquids can be respectively conveyed for pumping due to mutual isolation of the internal structures of the liquid inlet pipeline 6 and the liquid outlet pipeline 7, at this time, the left pump body 2 and the right pump body 3 can respectively supply two output directions for outputting different types of liquids, and at this time, the maximum value and the minimum value of the lift of the pneumatic diaphragm pump are respectively calculated for the left pump body 2 and the right pump body 3;

Fourth kind: the left bypass liquid inlet 62, the right bypass liquid inlet 63 and the central liquid outlet 71 are respectively opened to seal other interfaces, at the moment, the left pump body 2 and the right pump body 3 are used for conveying the same liquid, and under the driving of an air source, the pneumatic mechanism 1 can reciprocate to respectively output power to the left transmission mechanism 4 and the right transmission mechanism 5; at this time, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 are both in a closed state; at this time, the liquid respectively entering from the left bypass liquid inlet 62 and the right bypass liquid inlet 63 can respectively enter the left pump body 2 and the right pump body 3 and can be discharged from the central liquid outlet 71, and at this time, the maximum value and the minimum value of the lift of the pneumatic diaphragm pump are overlapped between the left pump body 2 and the right pump body 3.

Further, referring to fig. 1-5, the pneumatic mechanism 1 includes a reversing air chamber 11, the reversing air chamber 11 includes a left air chamber 111 and a right air chamber 112, an air chamber channel 113 is disposed between the left air chamber 111 and the right air chamber 112, a driving disc 12 is slidably disposed in the air chamber channel 113, and the driving disc 12 can separate the left air chamber 111 from the right air chamber 112; the left air chamber 111 and the right air chamber 112 are respectively connected with an air source through electromagnetic valves, and when the air source supplies air to the left air chamber 111 and the right air chamber 112 respectively and the air pressure inside the left air chamber 111 and the right air chamber 112 is not uniform, the driving disk 12 can slide inside the air chamber channel 113 to balance the air pressure inside the left air chamber 111 and the right air chamber 112.

The pneumatic mechanism 1 further comprises a driving connecting rod 13, wherein the center of the driving connecting rod 13 is fixed with the driving disc 12, and magnetic transmission discs 131 are respectively arranged at two ends of the driving connecting rod 13; the left transmission mechanism 4 comprises a left transmission rod 41, one end of the left transmission rod 41, which is close to the driving connecting rod 13, is provided with a left electromagnetic driven disc 411, and one end of the left transmission rod 41, which is close to the left pump body 2, is fixedly connected with a left diaphragm 21 in the left pump body 2; the right transmission mechanism 5 comprises a right transmission rod 51, a right electromagnetic driven disc 511 is arranged at one end of the right transmission rod 51, which is close to the driving connecting rod 13, and one end of the right transmission rod 51, which is close to the right pump body 3, is fixedly connected with the right diaphragm 31 inside the right pump body 3.

The left transmission rod 41, the left diaphragm 21 and the magnetic transmission disc 131 of the drive link 13 near one end of the left transmission rod 41 are located in a space separated from the left air chamber 111; the magnetic transmission disc 131 of the right transmission rod 51, the right diaphragm 31 and the driving connecting rod 13, which is close to one end of the right transmission rod 51, is positioned in a space separated from the right air chamber 112, so that when the magnetic transmission disc is used, the left diaphragm 21 is separated from the left air chamber 111, the right diaphragm 31 is separated from the right air chamber 112, the left diaphragm 21 and the right diaphragm 31 can be prevented from being contacted with the outside, the elastic deformation in the pumping operation process can be executed in a pre-prepared closed environment, the aging acceleration caused by the contact of the left diaphragm 21 and the right diaphragm 31 with the outside is effectively avoided, and the service lives of the left diaphragm 21 and the right diaphragm 31 are ensured.

The left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 can generate repulsive force with the magnetic transmission discs 131 arranged at the two ends of the driving connecting rod 13 respectively after being electrified respectively, and the transmission with the driving connecting rod 13 is disconnected; the left electromagnetic driven plate 411 and the right electromagnetic driven plate 511 are connected with a two-way switch, and when the two-way switch is in any one of the closed states, only one power transmission between the left electromagnetic driven plate 411 and the right electromagnetic driven plate 511 can be disconnected.

The left pump body 2 further comprises a left pump chamber 22, and the left transmission rod 41 can drive the left diaphragm 21 to move in the process of moving along with the driving connecting rod 13, so that the volume of the left pump chamber 22 is changed; the right pump body 3 further comprises a right pump chamber 32, and the right transmission rod 51 can drive the right diaphragm 31 to move in the process of moving along with the driving connecting rod 13, so that the volume of the right pump chamber 32 is changed.

When in use, the left air chamber 111 and the right air chamber 112 are respectively connected with an air source through electromagnetic valves, the air source respectively supplies air or exhausts air to the inside of the left air chamber 111 and the right air chamber 112 through the opening and closing of the electromagnetic valves so as to adjust the pressure difference between the left air chamber 111 and the right air chamber 112, when the air pressure in the left air chamber 111 is greater than the air pressure in the right air chamber 112, the driving disc 12 is pushed to slide to one side of the right air chamber 112 in the air chamber channel 113, otherwise, when the air pressure in the left air chamber 111 is less than the air pressure in the right air chamber 112, the driving disc 12 is pushed to slide to one side of the left air chamber 111 in the air chamber channel 113, so that the driving connecting rod 13 fixed between the driving disc 12 is driven to slide back and forth through the reciprocating sliding of the driving disc 12 in the air chamber channel 113;

At this time, since the end of the left transmission rod 41, which is close to the driving connecting rod 13, is provided with the left electromagnetic driven disc 411, the end of the left transmission rod 41, which is close to the left pump body 2, is fixedly connected with the left diaphragm 21 in the left pump body 2; a right electromagnetic driven disc 511 is arranged at one end of the right transmission rod 51, which is close to the driving connecting rod 13, and one end of the right transmission rod 51, which is close to the right pump body 3, is fixedly connected with the right diaphragm 31 in the right pump body 3; the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 can generate repulsive force with the magnetic transmission discs 131 arranged at the two ends of the driving connecting rod 13 respectively after being electrified, and disconnect transmission with the driving connecting rod 13 (the magnetic transmission disc 1311 has magnetic force, and the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 can only be magnetically connected with the magnetic transmission disc 1311 under the attraction of the magnetic force of the magnetic transmission disc 1311 when not electrified), and after any one of the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 is electrified, the magnetic pole directions of the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 are the same as the magnetic pole direction of the magnetic transmission disc 1311, so that repulsive force is generated); so that the left diaphragm 21 can be driven to move in the process that the left transmission rod 41 moves along with the driving connecting rod 13 through the magnetic force fixed transmission between the left electromagnetic driven disc 411 and the magnetic transmission disc 131, and the volume of the left pump chamber 22 is changed so as to perform pumping operation on the left pump body 2; similarly, the right diaphragm 31 can be driven to move in the process that the right transmission rod 51 moves along with the driving connecting rod 13 through the fixed transmission of the magnetic force between the right electromagnetic driven disc 511 and the magnetic transmission disc 131, and the volume of the right pump chamber 32 is changed to perform pumping operation on the left pump body 2;

And the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 are connected with a bidirectional switch (a single-pole three-throw switch can be adopted in the embodiment, the middle position is in an off state, the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 are not electrified), when the bidirectional switch is in any one of the on states, one power transmission between the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 can be disconnected, when the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 are pushed to the farthest positions from the corresponding magnetic transmission discs 131, the magnetic transmission discs 131 also move to the maximum positions of the reciprocating motion away from the middle position, and the distance between the magnetic transmission discs 131 is too large, so that the magnetic interference can not drive the left electromagnetic driven disc 411 and the right electromagnetic driven disc 511 to move any more; thereby, the power transmission between the left transmission mechanism 4 and the left pump body 2 and the power transmission between the right transmission mechanism 5 and the right pump body 3 can be disconnected at the same time, and the pumping operation of the pneumatic diaphragm pump can be effectively executed.

Further, referring to fig. 1-3 and fig. 7-9, the check valves 8 are respectively disposed inside the liquid inlet pipe 6 and at two sides of the central liquid inlet 61, and the opening directions of the check valves 8 inside the liquid inlet pipe 6 are respectively directions from the central liquid inlet 61 to the left bypass liquid inlet 62 and the right bypass liquid inlet 63; the liquid inlet pipe 6 is further provided with a plurality of sealing plugs 9, and the plurality of sealing plugs 9 can seal any central liquid inlet 61, left bypass liquid inlet 62 and right bypass liquid inlet 63 which are not required to be used respectively.

The inside of the liquid discharge pipeline 7 and the two sides of the central liquid discharge port 71 are respectively provided with a one-way valve 8, and the opening directions of the one-way valves 8in the liquid discharge pipeline 7 are respectively from the left bypass liquid discharge port 72 and the right bypass liquid discharge port 73 to the direction of the central liquid discharge port 71; the drain pipe 7 is further provided with a plurality of sealing plugs 9, and the plurality of sealing plugs 9 can seal any central drain port 71, left bypass drain port 72, and right bypass drain port 73, respectively, which are not required to be used.

The check valve 8 includes a valve body 81 and a valve body 82, a through hole 811 is formed in the center of the valve body 81, the valve body 82 is connected to the inner wall of the valve body 81 by a torsion spring, and the through hole 811 can be opened when the valve body 82 rotates to a side away from the through hole 811 against the elastic force of the torsion spring.

The sealing plug 9 comprises a plug 91, a threaded connection column 92 is arranged on one side of the plug 91, a sealing rubber ring 93 is arranged at one end, close to the plug 91, of the threaded connection column 92, and the sealing rubber ring 93 is used for sealing a connection part of the sealing plug 9.

So that the flow direction of the liquid in the liquid inlet pipeline 6 is respectively the direction from the central liquid inlet 61 to the left bypass liquid inlet 62 and the right bypass liquid inlet 63 by the arrangement of the one-way valve 8; the flow direction of the liquid in the liquid discharge pipe 7 is the direction from the left bypass liquid discharge port 72 and the right bypass liquid discharge port 73 to the central liquid discharge port 71; so that the liquid inlet pipe 6 and the liquid outlet pipe 7 can achieve various using modes of the pneumatic diaphragm pump through the arrangement of each one-way valve 8 and the blocking of each sealing plug 9.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A pneumatic diaphragm pump comprising a pneumatic mechanism (1), characterized in that: the pneumatic mechanism (1) is respectively provided with a left pump body (2) and a right pump body (3), the pneumatic mechanism (1) is in power transmission with the left pump body (2) through a left transmission mechanism (4), and the pneumatic mechanism (1) is in power transmission with the right pump body (3) through a right transmission mechanism (5);

The pneumatic mechanism (1) is connected with an air source, and the pneumatic mechanism (1) can reciprocate under the drive of the air source to respectively output power to the left transmission mechanism (4) and the right transmission mechanism (5);

in the same time, the power transmission between the left transmission mechanism (4) and the left pump body (2) and the power transmission between the right transmission mechanism (5) and the right pump body (3) are disconnected, and only one power transmission can be disconnected;

The left pump body (2) and the right pump body (3) are both communicated with a liquid inlet pipeline (6) and a liquid outlet pipeline (7), the liquid inlet pipeline (6) comprises a central liquid inlet (61), a left bypass liquid inlet (62) and a right bypass liquid inlet (63), and the liquid outlet pipeline (7) comprises a central liquid outlet (71), a left bypass liquid outlet (72) and a right bypass liquid outlet (73);

Liquid entering from the central liquid inlet (61) can enter the left pump body (2) and the right pump body (3) respectively, and can be discharged from the central liquid outlet (71), the left bypass liquid outlet (72) and the right bypass liquid outlet (73);

The liquid entering from the left bypass liquid inlet (62) can only pass through the left pump body (2) and can be discharged from the central liquid outlet (71) and the left bypass liquid outlet (72);

The liquid entering from the right bypass liquid inlet (63) can only pass through the right pump body (3) and can be discharged from the central liquid outlet (71) and the right bypass liquid outlet (73).

2. A pneumatic diaphragm pump according to claim 1, wherein: the pneumatic mechanism (1) comprises a reversing air chamber (11), the reversing air chamber (11) comprises a left air chamber (111) and a right air chamber (112), an air chamber channel (113) is arranged between the left air chamber (111) and the right air chamber (112), a driving disc (12) is slidably arranged in the air chamber channel (113), and the driving disc (12) can separate the left air chamber (111) from the right air chamber (112);

The left air chamber (111) and the right air chamber (112) are respectively connected with an air source through electromagnetic valves, and when the air source respectively supplies air to the left air chamber (111) and the right air chamber (112), and when the air pressure inside the left air chamber (111) and the air pressure inside the right air chamber (112) are uneven, the driving disc (12) can slide inside the air chamber channel (113) to balance the air pressure inside the left air chamber (111) and the air pressure inside the right air chamber (112).

3. A pneumatic diaphragm pump according to claim 2, wherein: the pneumatic mechanism (1) further comprises a driving connecting rod (13), wherein the center of the driving connecting rod (13) is fixed with the driving disc (12), and magnetic transmission discs (131) are respectively arranged at two ends of the driving connecting rod (13);

The left transmission mechanism (4) comprises a left transmission rod (41), a left electromagnetic driven disc (411) is arranged at one end, close to the driving connecting rod (13), of the left transmission rod (41), and one end, close to the left pump body (2), of the left transmission rod (41) is fixedly connected with a left diaphragm (21) in the left pump body (2);

the right transmission mechanism (5) comprises a right transmission rod (51), one end of the right transmission rod (51) close to the driving connecting rod (13) is provided with a right electromagnetic driven disc (511), and one end of the right transmission rod (51) close to the right pump body (3) is fixedly connected with a right diaphragm (31) inside the right pump body (3).

4. A pneumatic diaphragm pump according to claim 3, wherein: the magnetic transmission disc (131) of the left transmission rod (41), the left diaphragm (21) and the driving connecting rod (13) near one end of the left transmission rod (41) is positioned in a space separated from the left air chamber (111);

The right transmission rod (51), the right diaphragm (31) and the magnetic transmission disc (131) of the driving connecting rod (13) close to one end of the right transmission rod (51) are located in a space separated from the right air chamber (112).

5. A pneumatic diaphragm pump according to claim 4, wherein: the left electromagnetic driven disc (411) and the right electromagnetic driven disc (511) can generate repulsive force with the magnetic transmission discs (131) arranged at two ends of the driving connecting rod (13) respectively after being electrified respectively, and transmission with the driving connecting rod (13) is disconnected;

The left electromagnetic driven disc (411) and the right electromagnetic driven disc (511) are connected with a two-way switch, and when the two-way switch is in any one of the closed states, only one power transmission can be disconnected between the left electromagnetic driven disc (411) and the right electromagnetic driven disc (511).

6. A pneumatic diaphragm pump according to claim 4, wherein: the left pump body (2) further comprises a left pump chamber (22), and the left transmission rod (41) can drive the left diaphragm (21) to move in the moving process of the driving connecting rod (13) so as to change the volume of the left pump chamber (22);

The right pump body (3) further comprises a right pump chamber (32), and the right transmission rod (51) can drive the right diaphragm (31) to move in the moving process of the driving connecting rod (13) so as to change the volume of the right pump chamber (32).

7. A pneumatic diaphragm pump according to claim 1, wherein: the liquid inlet pipeline (6) is internally provided with one-way valves (8) respectively at two sides of the central liquid inlet (61), and the opening directions of the one-way valves (8) in the liquid inlet pipeline (6) are directions pointing to the left bypass liquid inlet (62) and the right bypass liquid inlet (63) respectively from the central liquid inlet (61);

The liquid inlet pipeline (6) is further provided with a plurality of sealing plugs (9), and the plurality of sealing plugs (9) can be used for sealing any central liquid inlet (61), left bypass liquid inlet (62) and right bypass liquid inlet (63) which are not needed to be used respectively.

8. A pneumatic diaphragm pump according to claim 7, wherein: the liquid discharge pipeline (7) is internally provided with one-way valves (8) respectively positioned at two sides of the central liquid discharge port (71), and the opening directions of the one-way valves (8) in the liquid discharge pipeline (7) are respectively from the left bypass liquid discharge port (72) and the right bypass liquid discharge port (73) to the direction of the central liquid discharge port (71);

the liquid draining pipeline (7) is further provided with a plurality of sealing plugs (9), and the plurality of sealing plugs (9) can be used for respectively sealing any central liquid draining port (71), left bypass liquid draining port (72) and right bypass liquid draining port (73) which are not needed to be used.

9. A pneumatic diaphragm pump according to claim 8, wherein: the one-way valve (8) comprises a valve body (81) and a valve core (82), wherein a through hole (811) is formed in the center of the valve body (81) in a penetrating mode, the valve core (82) is connected with the inner wall of the valve body (81) through a torsion spring, and when the valve core (82) overcomes the elastic force of the torsion spring to rotate towards the side far away from the through hole (811), the through hole (811) can be opened.

10. A pneumatic diaphragm pump according to claim 8, wherein: the sealing plug (9) comprises a plug head (91), a threaded connection column (92) is arranged on one side of the plug head (91), a sealing rubber ring (93) is arranged at one end, close to the plug head (91), of the threaded connection column (92), and the sealing rubber ring (93) is used for sealing a connection part of the sealing plug (9).