CN216741942U

CN216741942U - Double-head pump structure

Info

Publication number: CN216741942U
Application number: CN202123022840.2U
Authority: CN
Inventors: 杨军明; 陈建荣; 卢连苗; 卢勃
Original assignee: Nningbo Qiangsheng Electric Motor Co ltd
Current assignee: Nningbo Qiangsheng Electric Motor Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-06-14
Anticipated expiration: 2031-12-03

Abstract

The utility model relates to a diaphragm pump technical field, concretely relates to double-end pump structure. The double-pump-head vacuum pump comprises a driving part, wherein a first pump head assembly and a second pump head assembly are respectively arranged at two ends of the driving part, the first pump head assembly comprises a first working part, and the second pump head assembly comprises a second working part; the driving part comprises an output shaft, a first output end and a second output end are respectively arranged at two ends of the output shaft, a first eccentric wheel is arranged at the first output end and used for driving a first pump head assembly, a second eccentric wheel is arranged at the second output end and used for driving a second pump head assembly; a phase difference exists between the first working part and the second working part. The utility model discloses stagger the pump head operating mode at motor output shaft both ends, guarantee promptly that the suction chamber of two pump heads does not work simultaneously at the maximum efficiency point, promoted the result of use of double-end pump from this.

Description

Double-head pump structure

Technical Field

The utility model relates to a diaphragm pump technical field, concretely relates to double-end pump structure.

Background

The traditional diaphragm pump drives a crank through a motor, and then the crank drives a piston to swing, so that a pump chamber sequentially expands and contracts. When the pump chamber expands, liquid is drawn into the pump chamber from the inlet tube. When the pump chamber is subsequently contracted, the liquid in the pump chamber is forced into the discharge chamber by the pump, see patent No.: "CN 201720589286.0", patent name: a seven-cavity large-flux booster pump, and patent numbers: "CN 201720589198.0", patent name: the structure and the working principle of the diaphragm pump disclosed in the patents of 'a four-cavity diaphragm pump' and the like.

At present, in order to improve the utilization rate of driving pieces such as a motor or a motor in a pump body structure, it is common that eccentric wheels are arranged at two ends of a motor shaft, a pump head matched with the eccentric wheels is arranged, one eccentric wheel can be respectively installed to be matched with other assemblies of a diaphragm pump through two ends of a motor rotor of the coaxial diaphragm pump, and a diaphragm booster pump is respectively formed at two ends of the motor, so that the utilization rate of the motor is greatly improved.

However, the above double-head diaphragm pump does not have the eccentric wheels fixed at the two ends of the motor shaft, and generally, the eccentric wheels are directly and symmetrically arranged at the two ends of the motor shaft, when the motor shaft rotates, the two suction chambers in the pump head assemblies at the two ends of the motor can simultaneously work at the highest efficiency point, and the load of the motor can be doubled, so that the current and the temperature rise can be very high, and the continuity of water outlet is poor when the whole double-head diaphragm pump operates; the water outlet of the pump becomes unbalanced and smooth, and the vibration and the noise of the pipeline are easy to be driven.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by the utility model

To the unreasonable technical problem of double-end pump motor load, the utility model provides a double-end pump structure, it utilizes self structure, staggers the pump head operating mode at motor output shaft both ends, guarantees the suction chamber of two pump heads promptly and does not work at the maximum efficiency point simultaneously, has promoted the result of use of double-end pump from this.

Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a double-head pump structure comprises a driving part, wherein a first pump head assembly and a second pump head assembly are respectively arranged at two ends of the driving part, the first pump head assembly comprises a first working part, and the second pump head assembly comprises a second working part; the driving part comprises an output shaft, a first output end and a second output end are respectively arranged at two ends of the output shaft, a first eccentric wheel is arranged at the first output end and used for driving a first pump head assembly, a second eccentric wheel is arranged at the second output end and used for driving a second pump head assembly; a phase difference exists between the first working part and the second working part.

Optionally, the first eccentric comprises a first connecting portion, the second eccentric comprises a second connecting portion, and a phase difference exists between the first connecting portion and the second connecting portion.

Optionally, a phase difference exists between the first pump head assembly and the second pump head assembly.

Optionally, there is a phase difference between the first output and the second output.

Optionally, the first output end and the second output end are both flat squares.

Optionally, the phase difference between the flat faces of the flat squares is 45 °.

Optionally, assembly surfaces are disposed on the first eccentric wheel and the second eccentric wheel, a first diaphragm frame is disposed in the first pump head assembly, a second diaphragm frame is disposed in the second pump head assembly, the assembly surface on the first eccentric wheel is used for driving the first diaphragm frame, and the assembly surface on the second eccentric wheel is used for driving the second diaphragm frame.

Optionally, the first working part is a suction chamber of the first pump head assembly and the second working part is a suction chamber of the second pump head assembly.

Optionally, the first pump head assembly and the second pump head assembly are each provided with a first diaphragm and a second diaphragm.

Optionally, the first pump head assembly and the second pump head assembly each comprise a pressure regulating portion.

Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the utility model provides a double-end pump structure can utilize self structure, staggers the pump head operating mode at motor output shaft both ends, guarantees the suction chamber of two pump heads promptly and does not work at the maximum efficiency point simultaneously, has promoted the result of use of double-end pump from this.

Drawings

Fig. 1 is a schematic structural diagram of a staggered arrangement of a first pump head assembly and a second pump head assembly according to an embodiment of the present invention.

Fig. 2 is the embodiment of the present invention provides a schematic structural diagram of the staggered arrangement of the first eccentric wheel and the second eccentric wheel.

Fig. 3 is a schematic structural diagram of the staggered arrangement of the first output end and the second output end according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the first pump head assembly and the second pump head assembly provided by the embodiment of the present invention, which are symmetrically arranged.

Fig. 5 is a schematic structural diagram of an assembly surface 123 on the first eccentric wheel or the second eccentric wheel according to the embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of the first eccentric wheel or the second eccentric wheel according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an assembly of the first eccentric wheel or the second eccentric wheel and the driving portion according to the embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a staggered arrangement of the first membrane frame and the second membrane frame according to an embodiment of the present invention.

Detailed Description

For a further understanding of the present invention, reference will be made to the drawings and examples for a detailed description of the invention.

The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. A plurality of technical schemes in the same embodiment and a plurality of technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is all in the scope of the utility model.

Example 1

With reference to fig. 1 to 8, the present embodiment provides a dual head pump structure, which includes a driving part 100, a first pump head assembly 10 and a second pump head assembly 20 are respectively disposed at two ends of the driving part 100, the first pump head assembly 10 includes a first working part, and the second pump head assembly 20 includes a second working part; the driving part 100 comprises an output shaft 110, a first output end 111 and a second output end 112 are respectively arranged at two ends of the output shaft 110, the first output end 111 is provided with a first eccentric 121, the first eccentric 121 is used for driving the first pump head assembly 10, the second output end 112 is provided with a second eccentric 122, and the second eccentric 122 is used for driving the second pump head assembly 20; a phase difference exists between the first working part and the second working part.

The double-pump-head structure of this embodiment, stagger the operating mode of first pump head subassembly 10 and second pump head subassembly 20, guarantee that first work portion does not work at the maximum efficiency point simultaneously with second work portion, make the continuity of play water better, the frequency of play water is faster, the peak value of the single water yield of play water also diminishes, therefore, not only can reduce the electric current of motor, the temperature rise, the play water that can also make the double-end pump structure becomes more balanced, it is smooth and easy, the result of use of double-end pump has been promoted, help improving the vibration and the noise of pipeline.

In the present embodiment, the first working part and the second working part may be implemented in one conceivable manner as follows: cavities corresponding to the first pump head assembly 10 and the second pump head assembly 20 respectively and used for absorbing water during operation are called water absorption cavities; another embodiment that is conceivable is: the chamber cavities within the first pump head assembly 10 and the second pump head assembly 20, respectively, that are in operation to drain water, are referred to as discharge chambers.

The first pump head assembly 10 and the second pump head assembly 20 of this embodiment have the same structure as those related to conventional diaphragm pumps, and it will be understood that they each include a diaphragm that is directly or indirectly driven by the driving portion 100 to deform to provide a motive force for pumping and compressing the discharge fluid, thereby achieving the flow of water. The driving portion 100 is preferably an electric motor or a motor, and the output shaft 110 is an output rotating shaft of the electric motor or the motor. Further, according to the structure of the conventional diaphragm pump, the driving manner between the first eccentric 121 and the first pump head assembly 10 and between the second eccentric 122 and the second pump head assembly 20 is that the first eccentric 121 directly or indirectly drives the diaphragm frame in the first pump head assembly 10 to periodically rotate, the second eccentric 122 directly or indirectly drives the diaphragm frame in the second pump head assembly 20 to periodically rotate, the diaphragm frame is disposed in an inclined manner relative to the output shaft 110 when being mounted on the first eccentric 121 or the second eccentric 122, and the inclined diaphragm frame drives the diaphragm to move, thereby realizing that the diaphragm forms a power for sucking and compressing the discharged fluid.

The present embodiment aims to provide a phase difference between the first and second operating units, that is, to achieve the operation of the first and second operating units in a staggered manner. Taking the water-absorbing cavities in the first pump head assembly 10 and the second pump head assembly 20 as an example, when the first pump head assembly 10 and the second pump head assembly 20 are driven by the driving part 100 at the same time, the water-absorbing cavity of the first pump head assembly 10 absorbs water first, and then the water-absorbing cavity of the second pump head assembly 20 absorbs water again, that is, the water-absorbing cavity of the first pump head assembly 10 and the water-absorbing cavity of the second pump head assembly 20 are staggered to perform water-absorbing work, and there is a phase difference between the first working part and the second working part.

In order to achieve the effect of the phase difference between the first operating part and the second operating part, the following is conceivable:

the first mode is as follows: when the first output end 111 and the second output end 112 are symmetrically arranged on the output shaft 110, the first eccentric wheel 121 and the second eccentric wheel 122 are asymmetrically assembled on the output shaft 110, and the first eccentric wheel 121 and the second eccentric wheel 122 are assembled on the output shaft 110 with a certain angle difference, so that the first working part and the second working part can work successively to form a phase difference.

The second way is: first pump head assembly 10 and second pump head assembly 20 wholly stagger each other and set up in drive portion 100 both ends, the first output 111 at all the other output shaft 110 both ends with second output 112 keeps the symmetry setting, first eccentric 121 and second eccentric 122 keep the symmetry setting, from this, based on there being certain angular difference between first pump head assembly 10 and the second pump head assembly 20, can be so that first working portion and second working portion do not work simultaneously, and there is the phase difference in the two operating modes.

The third mode is as follows: when the first output end 111 and the second output end 112 are asymmetrically arranged on the output shaft 110, that is, the first output end 111 and the second output end 112 are staggered by a certain angle, and the first eccentric wheel 121 and the second eccentric wheel 122 have the same structure, so that when the first eccentric wheel 121 and the second eccentric wheel 122 are respectively assembled on the first output end 111 and the second output end 112, a certain angle difference naturally exists between the first eccentric wheel 121 and the second eccentric wheel 122, and a phase difference can exist between the first working part and the second working part.

The fourth mode is as follows: as shown in fig. 5 to 8, based on that the diaphragm frames are connected to the first eccentric wheel 121 or the second eccentric wheel 122 directly or indirectly at a certain angle, it can be understood that the diaphragm frames at two ends of the original double-headed pump structure are symmetrically arranged, but the diaphragm frames of the present embodiment are asymmetrically arranged, that is, the diaphragm frames at two ends use the output shaft 110 as a rotation center, and are deflected and staggered by a certain angle during assembly, so that a phase difference exists between the first working portion and the second working portion.

A specific example of the fourth mode is: the first eccentric wheel 121 or the second eccentric wheel 122 is directly or indirectly provided with a bearing, and a diaphragm frame is directly or indirectly assembled outside the bearing. Further conceivable embodiments are: the first eccentric wheel 121 is equipped with a bearing by using an inclined first assembling surface, the second eccentric wheel 122 is equipped with a bearing by using an inclined second assembling surface, the original first assembling surface and the original second assembling surface are symmetrically arranged at two ends of the output shaft 110, and in the present embodiment, the first assembling surface and the second assembling surface use the output shaft 110 as a rotation center, and are mutually deflected and staggered by a certain angle during assembly, so that the first assembling surface and the second assembling surface are no longer symmetrically arranged, and a staggered effect is formed. Furthermore, the diaphragm holders with which the first eccentric 121 and the second eccentric 122 are fitted are no longer symmetrically arranged, creating a staggering effect so that there is a phase difference between the first working part and the second working part.

In this embodiment, as a preferred option, when the pump body structure of this embodiment is a four-chamber diaphragm pump, the phase difference between the first working portion and the second working portion may be 45 °, taking the first working portion and the second working portion as an example, so that the water absorption conditions of the water absorption chambers are just staggered.

As an alternative embodiment of the present embodiment, the first eccentric 121 includes a first connecting portion, and the second eccentric 122 includes a second connecting portion, and there is a phase difference between the first connecting portion and the second connecting portion. In this embodiment, the first connecting portion of the first eccentric wheel 121 is preferably matched with the first output end 111 of the output shaft 110, and in a preferred mode, the first output end 111 is a flat square at one end of the cylindrical output shaft 110, the first connecting portion is a hole matched with the flat square, and the second connecting portion may be a hole matched with the flat square at the other end of the cylindrical output shaft 110.

Because the phase difference between the first working portion and the second working portion needs to be realized, when the two ends of the output shaft 110 are arranged in a flat-square symmetrical manner, the first connecting portion and the second connecting portion are holes matched with the flat square, the shapes of the holes are the same, the outer contours of the first eccentric wheel 121 and the second eccentric wheel 122 are the same, but the positions of the holes on the first eccentric wheel 121 are different from the positions of the holes on the second eccentric wheel 122, and an angle difference exists between the holes. When the first eccentric wheel 121 and the second eccentric wheel 122 are mounted on the flat symmetrical sides, they are naturally staggered by a certain angle to each other, as shown in fig. 2, and thus they are in an asymmetrical state.

Preferably, when the pump body structure of this embodiment is a four-chamber diaphragm pump, the phase difference between the first connecting portion and the second connecting portion can be 45 °, and the first working portion and the second working portion are water-absorbing chambers, for example, so that the water-absorbing conditions of the water-absorbing chambers are just staggered, and the phase difference between the first working portion and the second working portion is realized.

As an alternative embodiment of this embodiment, there is a phase difference between the first pump head assembly 10 and the second pump head assembly 20. As shown in fig. 1, in this embodiment, the first pump head assembly 10 and the second pump head assembly 20 are disposed at two ends of the driving portion 100 in a staggered manner, and other related structures, for example, the first output end 111 at two ends of the output shaft 110 and the second output end 112 are symmetrically disposed, and the first eccentric 121 and the second eccentric 122 are symmetrically disposed, so that the first working portion and the second working portion do not work simultaneously due to a certain angle difference between the whole first pump head assembly 10 and the whole second pump head assembly 20, and the working conditions of the two work portions have a phase difference.

Preferably, when the pump body structure of the present embodiment is a four-chamber diaphragm pump, the difference between the first pump head assembly 10 and the second pump head assembly 20 may be 45 °, and taking the first working portion and the second working portion as water absorption chambers as an example, the water absorption conditions of the water absorption chambers are just staggered, so as to achieve the phase difference between the first working portion and the second working portion.

As an optional implementation manner of this embodiment, there is a phase difference between the first output end 111 and the second output end 112. Referring to fig. 3, when the first output end 111 and the second output end 112 are asymmetrically disposed on the output shaft 110, that is, the first output end 111 and the second output end 112 are staggered by a certain angle, in this embodiment, the first output end 111 and the second output end 112 can both be flat squares at two ends of the output shaft 110, when the flat squares are asymmetrically disposed on the output shaft 110, that is, the flat surfaces of the flat squares are staggered by a certain angle, that is, the first output end 111 and the second output end 112 are staggered by a certain angle, and the rest of the structures of the first output end 111 and the second output end 112 are the same, and the angle is staggered by a certain angle.

Based on the fact that the first eccentric wheel 121 and the second eccentric wheel 122 have the same structure, when the first eccentric wheel 121 and the second eccentric wheel 122 are respectively assembled on the first output end 111 and the second output end 112, a certain angle difference naturally exists between the first eccentric wheel 121 and the second eccentric wheel 122, the first eccentric wheel 121 and the second eccentric wheel 122 are used for transmission, and then the first working portion and the second working portion are driven to work, so that a phase difference exists between working conditions of the first working portion and the second working portion.

When the pump body structure of this embodiment is a four-chamber diaphragm pump, preferably, the phase difference between the first output end 111 and the second output end 112 may be 45 °, taking the first working portion and the second working portion as water-absorbing chambers, for example, so that the water-absorbing conditions of the water-absorbing chambers are just staggered, and the phase difference between the first working portion and the second working portion is realized.

As an optional implementation manner of this embodiment, the first output end 111 and the second output end 112 are both flat squares. In this embodiment, since the output shaft 110 of the driving portion 100 is generally cylindrical, the first output end 111 and the second output end 112 are preferably flat and square, and the flat surfaces of the flat and square are easy to machine and adapt to the first eccentric 121 and the second eccentric 122.

When the pump body structure of the present embodiment is a four-chamber diaphragm pump, preferably, the phase difference between the flat surfaces of the first output end 111 and the second output end 112 may be 45 °, taking the first working portion and the second working portion as water-absorbing chambers as an example, so that the water-absorbing working conditions of the water-absorbing chambers are just staggered, and the phase difference between the first working portion and the second working portion is realized.

As an alternative embodiment of this embodiment, the phase difference between the flat faces of the flat squares is 45 °. When the pump body structure of this embodiment is a four-chamber diaphragm pump, and first output 111 and second output 112 are flat squares, as preferred, the phase difference between the flat faces of the flat squares can be 45 °, taking the first working portion and the second working portion as the example, so that the water suction conditions of the water suction chambers are just staggered, and the phase difference between the first working portion and the second working portion is realized.

Example 2

This embodiment proposes a double-head pump structure, which can be improved based on embodiment 1 as follows: mounting surfaces 123 are disposed on the first eccentric 121 and the second eccentric 122, a first diaphragm frame 131 is disposed in the first pump head assembly 10, a second diaphragm frame 132 is disposed in the second pump head assembly 20, the mounting surface 123 on the first eccentric 121 is used for driving the first diaphragm frame 131, and the mounting surface 123 on the second eccentric 122 is used for driving the second diaphragm frame 132.

As shown in fig. 5 to 8, in the present embodiment, corresponding to the fourth embodiment, based on that when the first diaphragm frame 131 and the first eccentric wheel 121, and when the second diaphragm frame 132 and the second eccentric wheel 122 are directly or indirectly connected, there are certain angles, it can be understood that the first diaphragm frame 131 and the second diaphragm frame 321 at two ends of the original double-headed pump structure are symmetrically disposed, and the first diaphragm frame 131 and the second diaphragm frame 132 of the present embodiment are asymmetrically disposed, that is, the first diaphragm frame 131 and the second diaphragm frame 132 use the output shaft 110 as a rotation center, and are offset by a certain angle during assembly, so that there is a phase difference between the first working portion and the second working portion.

One specific implementation is as follows: the first eccentric wheel 121 or the second eccentric wheel 122 is directly or indirectly provided with a bearing, and a first diaphragm frame 131 or a second diaphragm frame 321 is directly or indirectly assembled outside the bearing. Further conceivable embodiments are: the first eccentric wheel 121 is equipped with bearings by using the inclined assembly surface 123, the second eccentric wheel 122 is equipped with bearings by using the inclined assembly surface 123, and the original assembly surfaces 123 are symmetrically arranged at two ends of the output shaft 110, but in the present embodiment, the assembly surfaces 123 on the first eccentric wheel 121 and the assembly surfaces 123 on the second eccentric wheel 122 use the output shaft 110 as a rotation center, and are mutually deflected and staggered by a certain angle during assembly, so that the assembly surfaces 123 on the first eccentric wheel 121 and the assembly surfaces 123 on the second eccentric wheel 122 are not symmetrically arranged any more, and a staggered effect is formed. Furthermore, the first diaphragm frame 131 assembled with the first eccentric 121 and the second diaphragm frame 132 assembled with the second eccentric 122 are not symmetrically arranged any more, resulting in a staggered effect, so that there is a phase difference between the first working part and the second working part.

In an alternative embodiment of this embodiment, the first working part is the water suction chamber of the first pump head assembly 10, and the second working part is the water suction chamber of the second pump head assembly 20. In this embodiment, based on double-end pump structure operating condition, the chamber that absorbs water of first pump head subassembly 10 is preferred to first work portion, second work portion is the chamber that absorbs water of second pump head subassembly 20 preferred, use the chamber that absorbs water to absorb water the operating mode for adjusting the foundation, stagger through controlling the above-mentioned two chamber that absorb water's the operating mode that absorbs water, avoid two chamber simultaneous workings that absorb water to work at the most efficient point, reduce the load of motor from this, reduce the electric current of motor, the temperature rise, make the continuity of going out water better, the frequency of going out water is faster, the peak value of the water yield of single play water also diminishes, from this, the play water of double-end pump structure becomes more balanced, smooth and easy, the result of use of double-end pump has been promoted, the vibration and the noise of improvement pipeline.

As an alternative embodiment of this embodiment, the first pump head assembly 10 and the second pump head assembly 20 are each provided with a first diaphragm and a second diaphragm. The first pump head assembly 10 and the second pump head assembly 20 are both provided with a first diaphragm 212 and a second diaphragm 213, the first output end 111 and the second output end 112 at two ends of the driving part 100 are utilized to drive the first pump head assembly 10 and the second pump head assembly 20 through the first eccentric wheel 121 and the second eccentric wheel 122 respectively, so that the first diaphragm 212 and the second diaphragm 213 move and deform to form power for sucking and compressing discharge fluid, and water liquid is driven by the power to pass through the through holes where the first diaphragm and the second diaphragm are located, thereby completing the work of the diaphragm chamber assembly.

As an alternative embodiment of this embodiment, the first pump head assembly 10 and the second pump head assembly 20 each include a pressure regulating portion. In this embodiment, for guaranteeing the normal work of double-end pump structure, not cause the harm because of rivers are too big, all be provided with pressure regulating portion in first pump head subassembly 10 and second pump head subassembly 20, pressure regulating portion prefers to be the relief valve to realize when liquid pressure is too big, can in time release the pressure.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A double-head pump structure is characterized by comprising a driving part, wherein a first pump head assembly and a second pump head assembly are respectively arranged at two ends of the driving part, the first pump head assembly comprises a first working part, and the second pump head assembly comprises a second working part;

the driving part comprises an output shaft, a first output end and a second output end are respectively arranged at two ends of the output shaft, a first eccentric wheel is arranged at the first output end and used for driving a first pump head assembly, a second eccentric wheel is arranged at the second output end and used for driving a second pump head assembly;

a phase difference exists between the first working part and the second working part.

2. A double-headed pump structure according to claim 1, wherein the first eccentric includes a first connecting portion, the second eccentric includes a second connecting portion, and a phase difference exists between the first connecting portion and the second connecting portion.

3. A double head pump arrangement as claimed in claim 1, wherein the first pump head assembly and the second pump head assembly are out of phase.

4. A double head pump arrangement as claimed in claim 1, wherein the first output is out of phase with the second output.

5. A double head pump structure as in claim 1, wherein said first and second outputs are each flat square.

6. A double-ended pump structure according to claim 5, wherein said flat sides of said flat squares are 45 ° out of phase.

7. The structure of claim 1, wherein the first eccentric and the second eccentric are each provided with a mounting surface, the first pump head assembly is provided with a first diaphragm frame, the second pump head assembly is provided with a second diaphragm frame, the mounting surface of the first eccentric is used for driving the first diaphragm frame, and the mounting surface of the second eccentric is used for driving the second diaphragm frame.

8. A double head pump arrangement as claimed in claim 1, wherein the first working part is the suction chamber of the first pump head assembly and the second working part is the suction chamber of the second pump head assembly.

9. A double head pump construction according to claim 1, wherein the first pump head assembly and the second pump head assembly are each provided with a first diaphragm and a second diaphragm.

10. A double head pump arrangement according to any of claims 1 to 9, wherein the first pump head assembly and the second pump head assembly each comprise a pressure regulating portion.