CN113530799A

CN113530799A - Tandem diaphragm pump

Info

Publication number: CN113530799A
Application number: CN202110930949.1A
Authority: CN
Inventors: 许清香
Original assignee: Xiamen Keji Precision Equipment Co ltd
Current assignee: Xiamen Keji Precision Equipment Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-10-22
Anticipated expiration: 2041-08-13
Also published as: CN113530799B

Abstract

The present application relates to a series diaphragm pump, which includes a diaphragm assembly and a drive assembly. The diaphragm assembly includes a top seat, a valve seat and a diaphragm seat which are connected in sequence. The top seat is provided with an inlet and an outlet, and the valve seat is provided with an inlet communicating with the inlet. The inlet hole and the outlet hole communicated with the outlet, the diaphragm seat is provided with a diaphragm, the diaphragm includes a first movable bag and a second movable bag connected, and the first movable bag is provided with a first bag chamber communicated with the inlet hole, The second movable bag is provided with a second bag chamber that communicates with the outlet hole, the diaphragm is provided with a check valve that allows the fluid to flow only from the first bag chamber to the second bag chamber, and the valve seat is provided with a valve seat that allows the fluid to flow only from the first bag chamber to the second bag chamber. A first one-way valve for unidirectional flow from the inlet hole to the first bladder chamber and a second one-way valve for allowing fluid to flow only from the second bladder chamber to the outlet port in one direction, the driving component is connected to the diaphragm and can drive the first one-way valve The movable sac and the second movable sac alternately move up and down. When the diaphragm pump of the present application transmits fluid, the flow path is simple, the pressure loss is smaller, and the fluid is conveyed with greater pressure.

Description

Tandem diaphragm pump

Technical Field

The application relates to the field of diaphragm pumps, in particular to a serial diaphragm pump.

Background

The diaphragm pump is driven by a motor to move circularly, and then the diaphragm in the pump is driven by a mechanical device to move in a reciprocating manner, so that air in a pump cavity is compressed and stretched, pressure difference is generated between a water outlet or a water inlet and the external atmospheric pressure under the action of a one-way valve, water is pressed into the water inlet under the action of the pressure difference, and then the water is discharged from the water outlet. With the development of industry, the size of the diaphragm pump can be as large as that of occasions such as the transportation of industrial materials, the application of industrial equipment and the like according to requirements, and can also be as small as that of occasions such as small-sized household appliances, medical appliances and the like, so that the diaphragm pump has strong applicability and wide application.

The related art discloses a series diaphragm pump which mainly comprises a shell mechanism, a diaphragm mechanism and a driving mechanism, wherein the shell mechanism comprises a supporting assembly, a diaphragm seat and an upper cover; a first containing cavity, a second containing cavity and a third containing cavity are clamped between the upper cover and the diaphragm seat; the diaphragm seat is provided with a first channel, a second channel and a third channel; the diaphragm mechanism comprises a diaphragm, a first movable bag and a second movable bag which are connected in series; the diaphragm is provided with a first diaphragm and a second diaphragm, the first movable bag is provided with a first bag cavity, the second movable bag is provided with a second bag cavity, the first channel and the second channel are respectively communicated with the first bag cavity, and the third channel and the third containing cavity are respectively communicated with the second bag cavity; the driving mechanism is used for driving the first movable bag and the second movable bag to alternately move up and down. When the first movable bag moves downwards, the first bag cavity can form certain negative pressure to drive external solution to flow into the first bag cavity through the first containing cavity and the first channel; and the negative pressure in the first capsule cavity can drive the second membrane to move downwards and seal the second channel, so that the solution in the second capsule cavity is prevented from flowing into the first capsule cavity. When the second movable bag moves upwards, the pressure in the second bag cavity is increased, and the solution in the second bag cavity can be driven to flow out through the third cavity; and during this process the second membrane will further seal off the second passage due to the pressure in the second chamber. When the first movable bag moves upwards and the second movable bag moves downwards, the pressure of the first bag cavity is increased, and the pressure of the second bag cavity is decreased to form negative pressure. Therefore, the first movable bag drives the first membrane to move upwards and seal the liquid inlet, and simultaneously jacks the second membrane, so that the solution in the first bag cavity can flow into the second bag cavity through the second channel, the second containing cavity and the third channel. When in operation, the solution sequentially passes through the liquid inlet channel, the first cavity, the first channel, the first sac cavity, the second channel, the second cavity, the third channel, the second sac cavity, the third cavity and the liquid outlet channel to form a W-shaped flow path.

In view of the above-mentioned related art, the inventors believe that the flow path of the tandem diaphragm pump is too complicated, and a large pressure loss occurs during the solution transfer process, resulting in a small pressure.

Disclosure of Invention

In order to solve the problem that the flow path of a series diaphragm pump in the related art is complicated and pressure is low, the application provides a series diaphragm pump.

The application provides a serial-type diaphragm pump adopts following technical scheme:

a tandem diaphragm pump comprising:

the diaphragm assembly comprises a top seat, a valve seat and a diaphragm seat which are sequentially connected, wherein the top seat is provided with an inlet and an outlet, the valve seat is provided with an inlet communicated with the inlet and an outlet communicated with the outlet, the diaphragm seat is provided with a diaphragm, the diaphragm comprises a first movable bag and a second movable bag which are connected, the first movable bag is provided with a first bag chamber communicated with the inlet, the second movable bag is provided with a second bag chamber communicated with the outlet, the diaphragm is provided with a check valve which enables fluid to flow from the first bag chamber to the second bag chamber only, and the valve seat is provided with a first check valve which enables the fluid to flow from the inlet to the first bag chamber only in a one-way mode and a second check valve which enables the fluid to flow from the second bag chamber only in a one-way mode to the outlet;

and the driving assembly is connected with the diaphragm and can drive the first movable bag and the second movable bag to move up and down in a staggered manner.

By adopting the technical scheme, when the diaphragm pump operates, the driving assembly drives the first movable bag and the second movable bag to move up and down in a staggered manner, when the first movable bag moves down, the second movable bag moves up, the space of the first bag chamber becomes large and negative pressure is formed inside, at the moment, the first one-way valve is opened under the action of pressure difference to enable the inlet hole to be communicated with the first bag chamber, fluid enters the first bag chamber through the inlet hole and the inlet hole under the action of the pressure difference, the first movable bag gradually moves up along with the driving of the driving assembly, the second movable bag gradually moves down, the space of the first bag chamber becomes small and the internal pressure is increased, the inlet hole is blocked by the first one-way valve to prevent the fluid from flowing back from the inlet hole, under the action of the pressure, the check valve is opened to enable the first bag chamber to be communicated with the second bag chamber, the fluid in the first bag chamber flows into the second bag chamber along with the driving of the driving assembly, the first movable bag moves downwards, the second movable bag moves upwards, negative pressure formed in the first movable bag enables the check valve to separate the first bag chamber from the second bag chamber, the space of the second bag chamber becomes smaller gradually, pressure in the second bag chamber becomes larger gradually, the second check valve is opened, fluid flows out from the outlet through the outlet under the action of the pressure, and the fluid is conveyed in a circulating mode.

When the diaphragm pump operates, fluid flows through the inlet, the inlet hole, the first bag chamber, the second bag chamber, the outlet hole and the outlet in sequence to form a U-shaped flow path, and compared with a W-shaped flow path, the flow path is simpler to convey the fluid, shorter and smaller in pressure loss in the fluid conveying process, so that the diaphragm pump has higher pressure in the fluid conveying process and is beneficial to conveying the fluid; and the simplification of the flow path also greatly reduces the difficulty of industrial production implementation, the production process is simple, the cost is lower, the failure rate of the product is low, and the product is not easy to damage.

Optionally, the top seat is connected with the valve seat in a sealing manner.

Through adopting above-mentioned technical scheme, the sealed connection of footstock and disk seat can avoid the fluid seepage and lead to the pressure leakage, prevents to produce extra pressure loss among the fluid transportation process.

Optionally, the top seat is sealed with the valve seat by welding.

Through adopting above-mentioned technical scheme, the sealed effectual of footstock and disk seat welded sealed mode, and sealed effect is stable.

Optionally, a sealing gasket is arranged between the top seat and the valve seat, and a liquid inlet hole communicated with the inlet hole correspondingly and a liquid outlet hole communicated with the outlet hole correspondingly are formed in the sealing gasket.

By adopting the technical scheme, the sealing processing difficulty between the top seat and the valve seat is low by adopting a sealing gasket mode, and the top seat and the valve seat are convenient to separate for maintenance; the liquid inlet hole is used for keeping the inlet communicated with the inlet hole, and the liquid outlet hole is used for keeping the outlet communicated with the outlet hole.

Optionally, a liquid inlet cavity communicated with the inlet and a liquid outlet cavity communicated with the outlet are arranged at the bottom of the top seat, the inlet is communicated with the inlet hole through the liquid inlet cavity, and the outlet is communicated with the outlet hole through the liquid outlet cavity.

Through adopting above-mentioned technical scheme, in fluid transportation process, the feed liquor chamber can be full of to the fluid and go out the sap cavity to guarantee that the fluid can continuously and stably get into first bag room and flow out from the export.

Optionally, the first check valve and the second check valve are both provided with fixing heads, the valve seat is provided with mounting holes corresponding to the first check valve and the second check valve one to one, and the fixing heads are clamped in the mounting holes.

Through adopting above-mentioned technical scheme, the mode that adopts fixed head and mounting hole joint is installed first check valve and second check valve and can be realized the dismouting of first check valve and second check valve, is convenient for change when first check valve and second check valve are ageing damaged.

Optionally, an elastic sealing ring is arranged on the diaphragm, the first movable bag, the second movable bag and the check valve are located in an inner area of the elastic sealing ring, and the valve seat abuts against the elastic sealing ring.

Through adopting above-mentioned technical scheme, the disk seat supports tightly in elastic sealing ring during the installation, and elastic sealing ring can take place deformation and utilize deformation to be located the region between first activity bag and the second activity bag to disk seat and diaphragm and seal to prevent that the fluid seepage and produce pressure loss.

Optionally, be equipped with the non return chamber on the diaphragm, the non return chamber is located the inboard region of elastic sealing ring, the check valve set up in non return chamber top and with non return chamber open-top between form the conduction mouth, the non return chamber communicates in second bag room through the conduction mouth.

By adopting the technical scheme, the check valve is easier to deform and form a larger flow passage due to the arrangement of the check cavity, so that the fluid can flow into the second bag chamber more conveniently, and the resistance of the fluid flowing into the second bag chamber through the check valve is reduced.

Optionally, the check cavity extends downwards from the top of the diaphragm and penetrates through the bottom of the diaphragm.

By adopting the technical scheme, the processing difficulty of the check cavity is greatly reduced, the check valve is easier to process and form, and the production cost is reduced.

Optionally, a convex ring is arranged on the diaphragm seat, the diaphragm abuts against the convex ring, and the non-return cavity is located in the convex ring.

Through adopting above-mentioned technical scheme, diaphragm and bulge loop butt during the installation, the diaphragm can produce deformation and support tightly in order to realize the sealed to non return chamber bottom with the bulge loop, prevents that fluid from the gap seepage between diaphragm seat and the diaphragm.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the diaphragm pump operates, fluid flows through the inlet, the inlet hole, the first bag chamber, the second bag chamber, the outlet hole and the outlet in sequence to form a U-shaped flow path, and compared with a W-shaped flow path, the flow path is simpler to convey the fluid, shorter and smaller in pressure loss in the fluid conveying process, so that the diaphragm pump has higher pressure in the fluid conveying process and is beneficial to conveying the fluid; the simplification of the flow path also greatly reduces the difficulty of industrial production implementation, the production process is simple, the cost is lower, the failure rate of the product is low, and the product is not easy to damage;

2. by arranging the buffer cavity, in the process of fluid conveying, the buffer cavity can be filled with the fluid, so that the fluid can continuously and stably enter the first sac chamber and flow out of the outlet;

3. the check valve is easier to deform and form a larger flow passage by arranging the check cavity, so that the fluid can flow into the second bag chamber more conveniently, and the resistance of the fluid flowing into the second bag chamber through the check valve is reduced.

Drawings

FIG. 1 is a schematic diagram of example 1 of the present application;

FIG. 2 is an exploded view of example 1 of the present application;

FIG. 3 is an exploded view of a diaphragm assembly according to example 1 of the present application;

FIG. 4 is an exploded view of another perspective of the diaphragm assembly of example 1 of the present application;

FIG. 5 is a schematic sectional view of embodiment 1 of the present application;

FIG. 6 is an exploded view of the top seat, gasket, and valve seat of example 2 of the present application;

description of reference numerals:

1. a top seat; 11. an inlet; 12. an outlet; 13. a liquid inlet cavity; 14. a liquid outlet cavity;

2. a valve seat; 21. entering a hole; 22. an outlet hole; 23. a first check valve; 24. a second one-way valve; 25. a fixed head; 26. mounting holes; 27. a first groove; 28. a second groove;

3. a diaphragm seat; 31. a convex ring;

4. a diaphragm; 41. a first movable bladder; 411. a first bladder chamber; 42. a second movable bag; 421. a second bladder chamber; 43. a non-return valve; 44. a check cavity; 441. a conduction port; 45. an elastic sealing ring;

5. a gasket; 51. a liquid inlet hole; 52. a liquid outlet hole;

61. a base; 62. a motor; 63. an eccentric wheel; 64. a connecting rod; 65. guiding a needle;

7. buckling;

8. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments for understanding the inventive concept of the present application, and do not represent all the embodiments, nor do they explain the only embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application under the understanding of the inventive concept of the present application are within the protection scope of the present application.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiment of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

The embodiment of the application discloses a serial diaphragm pump, and aims to simplify a flow path inside the serial diaphragm pump so as to provide higher pressure for conveying fluid.

Example 1

Referring to fig. 1, a tandem diaphragm pump includes a diaphragm assembly for conveying a fluid and a drive assembly that cooperates with the diaphragm assembly to provide pressure to cause the fluid to be conveyed within the diaphragm assembly. The diaphragm component comprises a top seat 1, a valve seat 2 and a diaphragm seat 3 which are connected in sequence.

Referring to fig. 2 and 3, the top seat 1 is provided with an inlet 11 and an outlet 12, and the valve seat 2 is provided with an inlet hole 21 corresponding to and communicating with the inlet 11 and an outlet hole 22 corresponding to and communicating with the outlet 12.

The diaphragm seat 3 is provided with a diaphragm 4, in this embodiment, the diaphragm 4 is made of rubber, and in other embodiments, the diaphragm 4 may also be made of materials with good elasticity, such as silica gel.

Referring to fig. 3, the diaphragm 4 includes a first movable bag 41 and a second movable bag 42 connected, a first bag chamber 411 corresponding to and communicating with the inlet hole 21 is formed to be downwardly recessed at the top of the first movable bag 41, and a second bag chamber 421 corresponding to and communicating with the outlet hole 22 is formed to be downwardly recessed at the top of the second movable bag 42.

Referring to fig. 3 and 4, a check cavity 44 is formed by recessing a portion of the top of the diaphragm 4 between the first movable bag 41 and the second movable bag 42, a check valve 43 is connected to a top portion of an inner wall of the check cavity 44 near one side of the first bag chamber 411, the check valve 43 is integrated with the diaphragm 4, a conduction port 441 is formed between the check valve 43 and an opening of the top of the check cavity 44, the check cavity 44 is communicated with the second bag chamber 421 through the conduction port 441, and the check valve 43 enables fluid to flow only from the first bag chamber 411 to the second bag chamber 421.

Referring to fig. 4, the bottom of the valve seat 2 is provided with a first groove 27 communicating with the first bladder chamber 411 and a second groove 28 communicating with the second bladder chamber 421, and the second groove 28 is in communication with the second bladder chamber 421 and the check cavity 44. When the check valve 43 is opened, the first bladder 411 and the check chamber 44 are communicated through the first groove 27, and when the check valve 43 is closed, the communication between the first groove 27 and the check chamber 44 is sealed by the check valve 43.

Referring to fig. 3 and 4, the valve seat 2 is mounted with a first check valve 23 allowing a fluid to flow only one way from the inlet hole 21 to the first bladder 411 and a second check valve 24 allowing a fluid to flow only one way from the second bladder 421 to the outlet hole 22. In this embodiment, the first check valve 23 and the second check valve 24 are made of rubber, and in other embodiments, the first check valve 23 and the second check valve 24 may also be made of materials with good elasticity, such as silicone rubber.

All be connected with fixed head 25 on first check valve 23 and the second check valve 24, be equipped with the mounting hole 26 with first check valve 23 and second check valve 24 one-to-one on the disk seat 2, accomplish the installation of first check valve 23 and second check valve 24 in mounting hole 26 through with fixed head 25 joint.

Referring to fig. 2, the driving assembly includes a base 61 coupled to the diaphragm seat 3, a motor 62 fixedly installed in the base 61 by bolts, an eccentric 63 fixedly coupled to an output shaft of the motor 62, a connecting rod 64 coupled to the diaphragm 4, and a guide pin 65 coupling the eccentric 63 to the connecting rod 64, and the first and second

movable bladders

41 and 42 are respectively coupled to both ends of the connecting rod 64.

The guide pin 65 is gradually inclined towards the axial direction of the output shaft of the motor 62 along the direction close to the connecting rod 64, one end of the guide pin 65 is fixedly connected with the eccentric wheel 63, and the other end of the guide pin 65 penetrates into the connecting rod 64 from the center of the bottom of the connecting rod 64 and is in running fit with the connecting rod 64.

Referring to fig. 1, the top seat 1, the valve seat 2, the diaphragm seat 3 and the base 61 are fixed by a buckle 7, a clamping groove 8 matched with the buckle 7 is formed in the outer walls of the top seat 1, the valve seat 2, the diaphragm seat 3 and the base 61, and the buckle 7 is clamped in the clamping groove 8 to fixedly connect the top seat 1, the valve seat 2, the diaphragm seat 3 and the base 61.

Referring to FIG. 5, when the diaphragm pump is operated, the motor 62 rotates the eccentric 63 to make the guide pin 65 rotatably cooperate with the connecting rod 64 to drive the first movable bag 41 and the second movable bag 42 to move up and down alternately. When the first movable bag 41 moves downwards, the second movable bag 42 moves upwards, negative pressure is formed in the first bag chamber 411 to open the first check valve 23 under the action of pressure difference, the inlet hole 21 is communicated with the first bag chamber 411, fluid enters the first bag chamber 411 under the action of pressure difference, at the moment, the check valve 43 is in a closed state, the first movable bag 41 gradually moves upwards along with the rotation of the motor 62, the second movable bag 42 gradually moves downwards, the pressure in the first bag chamber 411 is increased, the first check valve 23 blocks the inlet hole 21, under the action of pressure, the check valve 43 is opened to enable the first bag chamber 411 to be communicated with the second bag chamber 421, the fluid flows from the first bag chamber 411 to the second bag chamber 421, the first movable bag 41 moves downwards along with the continuous rotation of the motor 62, the second movable bag 42 moves upwards, the negative pressure formed in the first movable bag 41 enables the check valve 43 to separate the first bag chamber 411 from the second bag chamber 421, the pressure in the second bladder 421 gradually increases to open the second check valve 24, so that the fluid flows out from the outlet 12 under the action of the pressure, and the circulation realizes the delivery of the fluid.

Referring to fig. 4, a liquid inlet chamber 13 communicated with the inlet 11 and a liquid outlet chamber 14 communicated with the outlet 12 are formed at the bottom of the top seat 1 in an upward concave manner, the inlet 11 is communicated with the inlet hole 21 through the liquid inlet chamber 13, and the outlet 12 is communicated with the outlet hole 22 through the liquid outlet chamber 14. During the fluid transportation process, the fluid will fill the liquid inlet chamber 13 and the liquid outlet chamber 14, so that the fluid can continuously and stably enter the first bladder 411 and flow out from the outlet 12, and the phenomenon that the fluid is intermittently sucked into the diaphragm pump or intermittently flows out from the diaphragm pump is effectively reduced.

Referring to fig. 5, in order to improve the sealing performance inside the diaphragm assembly to prevent fluid leakage and pressure leakage, the top seat 1 is connected with the valve seat 2 in a sealing manner, and the valve seat 2 is connected with the diaphragm seat 3 in a sealing manner, so that additional pressure loss generated in the fluid delivery process is prevented.

In this embodiment, footstock 1 and disk seat 2 adopt the welded mode to seal, and sealed effectual and sealed effect is stable, has realized the sealed of the wall of feed liquor chamber 13 and play liquid chamber 14 and footstock 1 and disk seat 2 edge junction.

Referring to fig. 3, the diaphragm 4 is provided with an elastic sealing ring 45, the elastic sealing ring 45 and the diaphragm 4 are made of the same material and are integrally formed, and the first movable bag 41, the second movable bag 42, the first groove 27, the second groove 28 and the check valve 43 are all located in the inner area of the elastic sealing ring 45. During installation, the valve seat 2 can be abutted against the elastic sealing ring 45, the elastic sealing ring 45 can deform and seal the joint of the valve seat 2 and the edge of the diaphragm 4 by utilizing the deformation, so that fluid can only flow along the first bag chamber 411, the non-return cavity 44 and the second bag chamber 421.

Referring to fig. 4, in order to reduce the processing difficulty of the check cavity 44 and the check valve 43 in the process, the check cavity 44 extends downward from the top of the diaphragm 4 and penetrates through the bottom of the diaphragm 4, so that the processing difficulty in the process is greatly reduced, and the reduction of the production cost is facilitated.

Referring to fig. 3, in order to prevent the fluid from leaking from the gap between the bottom of the check cavity 44 and the diaphragm seat 3, the diaphragm seat 3 is provided with the convex ring 31, the check cavity 44 is located in the convex ring 31, the convex ring 31 and the diaphragm seat 3 are integrated, the diaphragm 4 abuts against the convex ring 31 during installation, the diaphragm 4 is deformed and abuts against the convex ring 31 to seal the bottom of the check cavity 44, and extra pressure loss is avoided.

The implementation principle of the embodiment 1 is as follows: when the diaphragm pump operates, the driving assembly drives the first movable bag 41 and the second movable bag 42 to move up and down in a staggered manner, when the first movable bag 41 moves down, the second movable bag 42 moves up, the space of the first bag chamber 411 becomes large and negative pressure is formed inside, at the moment, the first check valve 23 is opened under the action of pressure difference to enable the inlet hole 21 to be communicated with the first bag chamber 411, and fluid enters the first bag chamber 411 through the inlet 11 and the inlet hole 21 under the action of pressure difference. As the driving assembly is driven, the first movable bladder 41 gradually moves upward, and the second movable bladder 42 gradually moves downward, the space of the first bladder chamber 411 becomes smaller and the internal pressure increases, the first check valve 23 blocks the inlet hole 21 to prevent the fluid from flowing back from the inlet hole 21, and under the pressure, the check valve 43 opens to communicate the first bladder chamber 411, the check cavity 44 and the second bladder chamber 421, and the fluid in the first bladder chamber 411 flows into the second bladder chamber 421 through the check cavity 44. When the first movable bag 41 moves downwards along with the driving of the driving assembly, the negative pressure formed inside the first movable bag 41 causes the check valve 43 to isolate the first bag chamber 411 from the check cavity 44, in the process, the second movable bag 42 moves upwards, the pressure in the second bag chamber 421 gradually increases along with the gradual reduction of the space of the second bag chamber 421, and then the second check valve 24 is opened, and the fluid flows out from the outlet 12 through the outlet 22 under the action of the pressure, so that the circulation realizes the fluid delivery. When the diaphragm pump operates, fluid sequentially flows through the inlet 11, the inlet hole 21, the first bag chamber 411, the second bag chamber 421, the outlet hole 22 and the outlet 12 to form a U-shaped flow path, and compared with a W-shaped flow path, the flow path is simpler to convey the fluid, shorter and less in pressure loss in the fluid conveying process, so that the fluid has higher pressure in the fluid conveying process and is beneficial to conveying the fluid; and the simplification of the flow path also greatly reduces the difficulty of industrial production implementation, the production process is simple, the cost is lower, the failure rate of the product is low, and the product is not easy to damage. In practical applications, the fluid may be a liquid or a gas.

Example 2

Referring to fig. 6, the present embodiment is different from embodiment 1 in that the top seat 1 and the valve seat 2 are sealed by a sealing gasket 5, the sealing gasket 5 is installed between the top seat 1 and the valve seat 2, the sealing gasket 5 is provided with a liquid inlet hole 51 and a liquid outlet hole 52, the liquid inlet hole 51 is opposite to and communicated with the liquid inlet hole 21, and the liquid outlet hole 52 is opposite to and communicated with the liquid outlet hole 22.

In this embodiment, the sealing gasket 5 is made of rubber, and in other embodiments, the sealing gasket 5 may also be made of a material with good elasticity, such as silicone rubber.

During installation, the top seat 1 is tightly abutted to the valve seat 2, and the sealing gasket 5 can deform due to the extrusion of the top seat 1 and the valve seat 2, so that the liquid inlet cavity 13 and the liquid outlet cavity 14 are separated. Adopt the mode of sealed pad 5 to seal between footstock 1 and the valve seat 2 and be convenient for footstock 1 and the separation of valve seat 2 in order to overhaul, feed liquor hole 51 is used for making import 11 and entering hole 21 keep the intercommunication, goes out liquid hole 52 and is used for making export 12 and exit hole 22 keep the intercommunication.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. a series diaphragm pump, is characterized in that, comprises:

A diaphragm assembly comprising a top seat (1), a valve seat (2) and a diaphragm seat (3) connected in sequence, the top seat (1) is provided with an inlet (11) and an outlet (12), so The valve seat (2) is provided with an inlet hole (21) communicating with the inlet (11) and an outlet hole (22) communicating with the outlet (12), and the diaphragm seat (3) is provided with a diaphragm (4), The diaphragm (4) includes a connected first movable bag (41) and a second movable bag (42), and the first movable bag (41) is provided with a first bag chamber that communicates with the inlet hole (21). (411), the second movable bladder (42) is provided with a second bladder chamber (421) that communicates with the outlet hole (22), and the diaphragm (4) is provided with a second chamber (421) so that the fluid can only flow from the first bladder chamber. ( 411 ) a check valve ( 43 ) that flows to the second bag chamber ( 421 ), the valve seat ( 2 ) is provided with a valve seat ( 2 ) that allows the fluid to flow only in one direction from the inlet hole ( 21 ) to the first bag chamber ( 411 ) ) of the first one-way valve (23) and the second one-way valve (24) that allows the fluid to only flow from the second bladder chamber (421) to the outlet hole (22) in one direction;

A driving assembly, which is connected to the diaphragm (4) and can drive the first movable bladder (41) and the second movable bladder (42) to move up and down alternately.

2 . The tandem diaphragm pump according to claim 1 , wherein the top seat ( 1 ) is in sealing connection with the valve seat ( 2 ). 3 .

3 . The tandem diaphragm pump according to claim 2 , wherein the top seat ( 1 ) and the valve seat ( 2 ) are welded and sealed. 4 .

4. The tandem diaphragm pump according to claim 2, characterized in that: a gasket (5) is arranged between the top seat (1) and the valve seat (2), and a gasket (5) is arranged on the gasket (5). There are liquid inlet holes (51) correspondingly communicating with the inlet holes (21) and liquid outlet holes (52) correspondingly communicating with the outlet holes (22).

5 . The tandem diaphragm pump according to claim 1 , wherein the bottom of the top seat ( 1 ) is provided with a liquid inlet cavity ( 13 ) communicating with the inlet ( 11 ) and a liquid inlet cavity ( 13 ) communicating with the outlet ( 12 ). 6 . A liquid outlet chamber (14), the inlet (11) is communicated with the inlet hole (21) through the liquid inlet chamber (13), and the outlet (12) is communicated with the outlet hole (22) through the liquid outlet chamber (14).

6. The tandem diaphragm pump according to claim 1, characterized in that: both the first one-way valve (23) and the second one-way valve (24) are provided with a fixed head (25), and the valve The seat (2) is provided with mounting holes (26) corresponding to the first one-way valve (23) and the second one-way valve (24) one-to-one, and the fixing head (25) is clamped to the mounting hole (26) Inside.

7. The tandem diaphragm pump according to claim 1, characterized in that: the diaphragm (4) is provided with an elastic sealing ring (45), the first movable bag (41), the second movable bag (42) ) and the check valve (43) are located in the inner area of the elastic sealing ring (45), and the valve seat (2) abuts against the elastic sealing ring (45).

8 . The tandem diaphragm pump according to claim 7 , wherein a check cavity ( 44 ) is provided on the diaphragm ( 4 ), and the check cavity ( 44 ) is located inside the elastic sealing ring ( 45 ). 9 . area, the check valve (43) is arranged on the top of the check chamber (44) and forms a conducting port (441) with the top opening of the check chamber (44), and the check chamber (44) conducts The port (441) is communicated with the second bladder chamber (421).

9 . The tandem diaphragm pump according to claim 8 , wherein the non-return cavity ( 44 ) extends downward from the top of the diaphragm ( 4 ) and penetrates through the bottom of the diaphragm ( 4 ). 10 .

10 . The tandem diaphragm pump according to claim 9 , wherein a convex ring ( 31 ) is provided on the diaphragm seat ( 3 ), and the diaphragm ( 4 ) is in contact with the convex ring ( 31 ), so that the The non-return cavity (44) is located in the convex ring (31).