CN113638867A

CN113638867A - Pump head of diaphragm booster pump, diaphragm booster pump and water treatment device

Info

Publication number: CN113638867A
Application number: CN202110903489.3A
Authority: CN
Inventors: 李国平; 王娟; 刘海涛; 郭锦斌
Original assignee: Shenzhen Angel Drinking Water Equipment Co Ltd
Current assignee: Shenzhen Angel Drinking Water Equipment Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2021-11-12
Also published as: CN115704376A; CN115704378A; CN219139313U; CN218542553U; CN115704377A

Abstract

The application provides a pump head, diaphragm booster pump and water treatment facilities of diaphragm booster pump, the pump head includes: a transmission member including a drive shaft; the eccentric assembly is connected with the driving shaft and is driven by the driving shaft to rotate; the balance wheel assembly is connected with the eccentric assembly, and the rotation of the eccentric assembly drives the balance wheel assembly to swing along the radial direction of the driving shaft; the four rectangular pressurizing components are connected with the transmission component and are arranged oppositely in pairs along the axis of the driving shaft, each pressurizing component comprises a piston chamber, and at least one pressurizing cavity is arranged on the inner wall of the piston chamber; the diaphragm and the piston chamber are sealed to form at least one pressurizing cavity; the oscillation of the balance wheel assembly drives the diaphragm to deform in the radial direction of the drive shaft, so that the at least one pressurizing cavity expands or compresses in the radial direction. Through radial deformation of the diaphragm of the two pairs of rectangular pressurizing parts which are arranged in pairs, the flow is improved, and meanwhile, the manufacturing process is simplified; the transmission part can meet the static balance and the dynamic balance during operation, thereby further reducing the vibration.

Description

Pump head of diaphragm booster pump, diaphragm booster pump and water treatment device

Technical Field

The application relates to the technical field of water treatment, concretely relates to pump head, diaphragm booster pump and water treatment facilities of diaphragm booster pump.

Background

The diaphragm booster pump has the working principle that the periodic movement of the diaphragm causes volume change to drive the rubber valve to periodically close and open the water inlet and the water outlet on the valve seat, so that the boosting is realized.

As shown in fig. 1 and 2, the key components of the conventional diaphragm booster pump include a motor, an eccentric wheel, three balance wheels, a diaphragm divided into three piston actuation areas, three pistons, a piston chamber including three sets of water inlets and a set of water outlets, a three-way water inlet check valve, a water discharge check valve, a pump head cover including a water inlet hole and a water discharge hole, and a water inlet flow passage and a water discharge flow passage which are separated from each other. Wherein, form the source water chamber between pump head lid inhalant canal and the piston chamber, form the high-pressure water chamber between pump head lid drainage runner and the piston chamber, form three independent pressure boost water chambers between piston chamber and the diaphragm.

When the motor rotates, the eccentric wheel can be driven to rotate. The balance wheels are limited not to rotate, so that the three balance wheels can only perform axial reciprocating motion in sequence, and the three piston motion areas of the diaphragm can perform synchronous axial expansion-compression motion by the axial reciprocating motion of the balance wheels. When the diaphragm piston moves toward the expansion direction, the water inlet check valve is opened, and the source water is sucked into the pressurized water cavity from the water inlet. When the diaphragm piston moves towards the compression direction, the drainage one-way valve is opened, pressurized water is pressed out and enters the high-pressure water cavity through the drainage hole, and is discharged out of the pump through the drainage hole of the pump head cover, so that required high-pressure water is provided.

The diaphragm booster pump has the following disadvantages: in the working process, the three balance wheels push the diaphragm in turn and continuously apply force in the same direction. When the rotating speed of the motor shaft reaches 700-1200rpm, the vibration generated by the alternate motion of the three balance wheels is extremely large, so that great noise is generated. In addition, the diaphragm booster pump has a small flow rate. To increase the flow rate, the motor speed needs to be increased or the pump body needs to be increased in volume. However, increasing the motor speed can cause vibration and noise problems to be more serious, and the increased size can cause the booster pump to be difficult to install in cooperation with the existing equipment.

In order to solve the problem of vibration of the diaphragm of the booster pump caused by axial force, a booster pump structure has been proposed in which a plurality of eccentric wheels are used to simultaneously apply opposite radial forces to a set of fan-shaped booster chambers, and the radial forces cancel each other out to reduce vibration and noise and increase flow rate. However, in the manufacturing process of the fan-shaped pressurizing cavity structure, the difficulty that the mold opening process is complex, the manufacturing difficulty is high and the like exists, and the vibration cannot be completely eliminated.

Disclosure of Invention

In order to reduce the manufacturing degree of difficulty of the booster pump, further eliminate vibrations, the application provides a pump head, diaphragm booster pump and water treater of diaphragm booster pump.

According to a first aspect of the present application, there is provided a pump head of a diaphragm booster pump, the pump head comprising:

the transmission component comprises a transmission component and a transmission component,

a drive shaft;

the eccentric assembly is connected with the driving shaft and driven by the driving shaft to rotate;

the balance wheel assembly is connected with the eccentric assembly, and the rotation of the eccentric assembly drives the balance wheel assembly to swing along the radial direction of the driving shaft;

four rectangular pressurizing parts connected to the transmission part and set oppositely along the axis of the driving shaft,

the piston chamber is provided with at least one pressurizing cavity on the inner wall;

a diaphragm enclosing said piston chamber to form said at least one booster cavity;

the oscillation of the balance wheel assembly drives the diaphragm to deform along the radial direction of the driving shaft, so that the at least one pressurizing cavity expands or compresses along the radial direction.

According to some embodiments of the present application, the eccentric assemblies are 180 ° out of phase during rotation, and the resulting eccentric forces cancel each other out and are moment balanced.

According to some embodiments of the present application, the eccentric assembly comprises a first eccentric, a second eccentric, and a third eccentric arranged in sequence along the drive shaft; the eccentricity of the third eccentric wheel is consistent with that of the first eccentric wheel; the second eccentric is eccentric opposite to the first eccentric.

According to some embodiments of the application, the balance wheel assembly, during oscillation, has zero resultant of the eccentric forces in the radial direction of the drive shaft and is moment-balanced.

According to some embodiments of the application, the balance wheel assembly comprises:

the first balance wheel is connected with the first eccentric wheel;

the second balance wheel is connected with the second eccentric wheel;

a third balance wheel connected with the third eccentric wheel;

the third balance wheel and the first balance wheel swing in the same direction;

the second balance wheel swings in the opposite direction to the first balance wheel.

According to some embodiments of the application, the at least one plenum comprises:

the first balance wheel drives the diaphragm to deform so as to radially expand or compress;

the second booster cavity is driven by the second balance wheel to deform the diaphragm so as to radially expand or compress the diaphragm;

and the third pressurizing cavity is driven by the third balance wheel to deform the diaphragm so as to radially expand or compress the diaphragm.

According to some embodiments of the present application, the third plenum chamber and the first plenum chamber are simultaneously expanded or compressed; the second pressurizing cavity and the first pressurizing cavity compress or expand reversely.

According to some embodiments of the present application, when the thinner portions of the first eccentric wheel and the third eccentric wheel rotate to the corresponding first balance wheel and the third balance wheel, the deformation regions of the diaphragm corresponding to the first balance wheel and the third balance wheel are in a near-axis position, and the volumes of the first pressurizing cavity and the third pressurizing cavity are maximum; the eccentric positions of the second eccentric wheel, the first eccentric wheel and the third eccentric wheel are opposite, meanwhile, the thinner part of the second eccentric wheel rotates to the position of the second balance wheel, the corresponding deformation area of the diaphragm is located at the position close to the axis, and the volume of the second pressurizing cavity is maximum.

According to some embodiments of the present application, when the first eccentric wheel and the third eccentric wheel are rotated to the corresponding first balance wheel and third balance wheel at the eccentric thickness position, the deformation region of the diaphragm corresponding to the first balance wheel and third balance wheel is at a far axis position, and the volume of the first pressurizing cavity and third pressurizing cavity is minimum; meanwhile, the thicker part of the second eccentric wheel rotates to the position of the second balance wheel, the corresponding deformation area of the diaphragm is positioned at the far axis position, and the volume of the second pressurizing cavity is the minimum.

According to some embodiments of the present application, the at least one pressurizing cavity of the four rectangular pressurizing members performs an expansion or compression motion in sequence.

According to some embodiments of the present application, the at least one pumping chamber completes one expansion and compression cycle per rotation of the drive shaft.

According to some embodiments of the application, the pump head further comprises:

the first end cover is arranged at one end of the transmission component;

the water inlet end is arranged on the first end cover;

and the water outlet end is arranged on the first end cover.

According to some embodiments of the application, the piston chamber further comprises:

the water inlet cavity is connected with the water inlet end;

and the water outlet cavity is connected with the water outlet end.

According to some embodiments of the present application, when the diaphragm expands in a radial direction of the drive shaft, the inlet check valve of the at least one pressurizing chamber opens, and source water is drawn into the at least one pressurizing chamber; when the water is compressed along the radial direction of the driving shaft, the water outlet one-way valve of the at least one pressurizing cavity is opened, and pressurized water is discharged.

According to another aspect of the present application, there is also provided a diaphragm booster pump including the pump head of the above-described diaphragm booster pump.

According to another aspect of the present application, there is also provided a water treatment apparatus including: the diaphragm booster pump is provided.

The pump head of the diaphragm booster pump provided by the application thoroughly changes axial deformation of the diaphragm into radial deformation, and the radial deformation of the diaphragm is used for realizing pressurization, so that the deformation area of the diaphragm is effectively increased, and the flow of the diaphragm booster pump is improved; on the basis, the structural forms of the piston chamber and the pressurizing cavity are further improved, the requirements on a die are greatly reduced, the manufacturing process is simplified, and the water inlet end and the water outlet end are arranged at one end of the pump head, so that the structure of a product is more compact; in addition, the three eccentric wheels and the three balance wheels are arranged, so that the pump head reaches a dynamic balance state of resultant moment balance, vibration is further reduced, and noise is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on these drawings without exceeding the protection scope of the present application.

Fig. 1 is a schematic view of a conventional diaphragm booster pump.

Fig. 2 is an exploded view of a conventional diaphragm booster pump.

Figure 3 is a schematic diagram of a membrane booster pump according to an example embodiment of the present application.

Figure 4 is an exploded view of a diaphragm booster pump according to an exemplary embodiment of the present application.

FIG. 5 is an exploded view of a transmission component according to an exemplary embodiment of the present application.

FIG. 6 is a schematic illustration of an eccentric assembly according to an exemplary embodiment of the present application.

Fig. 7 is a schematic diagram of a balance assembly according to an example embodiment of the present application.

FIG. 8 is an exploded view of a plenum member according to an example embodiment of the present application.

FIG. 9 is a schematic view of a piston chamber according to an example embodiment of the present application.

FIG. 10 is a schematic view of a diaphragm according to an exemplary embodiment of the present application.

Figure 11 is a schematic diagram of an adapter according to an example embodiment of the present application.

Fig. 12 is a schematic view of a first end cap according to an example embodiment of the present application.

FIG. 13 is a schematic illustration of a substrate according to an example embodiment of the present application.

Detailed Description

Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.

It will be understood that, although the terms first, second, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one element from another. Thus, a first component discussed below may be termed a second component without departing from the teachings of the present concepts. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Those skilled in the art will appreciate that the drawings are merely schematic representations of exemplary embodiments, which may not be to scale. The blocks or flows in the drawings are not necessarily required to practice the present application and therefore should not be used to limit the scope of the present application.

In order to solve the problem of vibration caused by axial force on a diaphragm of the existing booster pump, a booster pump structure which adopts a plurality of eccentric wheels to apply opposite radial force to a booster cavity simultaneously appears, and vibration and noise are reduced by mutual offset of the radial force. The inventor finds that in the structure, the piston chamber and the pressurizing cavity are in paired fan-shaped blocks, so that the requirement on a die is high, the die opening process is complex, and the manufacturing process difficulty is high; and the vibrations cannot be completely eliminated.

Therefore, the pump head of the novel diaphragm booster pump is provided, on one hand, the difficulty of the manufacturing process is reduced through structural improvement, and the product structure is more compact; on the other hand, on the basis of the improvement of the product structure, the dynamic balance state is achieved through a plurality of radial forces, so that the vibration is thoroughly eliminated. The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 3 is a schematic diagram of a membrane booster pump according to an exemplary embodiment of the present application; figure 4 is an exploded view of a diaphragm booster pump according to an exemplary embodiment of the present application.

As shown in fig. 3 and 4, the pump head 1000 of the diaphragm booster pump provided by the present application includes a transmission member 100, a base 200, four rectangular pressurizing members 300, and a first end cap 400. The base 200 is a structural main body of the pump head 1000, the transmission component 100 is arranged inside the base 200, and the four rectangular pressurizing components 300 are arranged around the base 200; the first cap 400 is disposed at one end of the base 200.

Compared with the pump heads of the conventional membrane booster pumps in fig. 1 and 2, the pump head 1000 of the membrane booster pump provided by the present application is structurally improved from a cylindrical shape to a rectangular structure. The four rectangular pressurizing members 300 are arranged opposite to each other two by two along the axis of the driving member 100 (i.e., the axis of the pump head 1000). As can be seen from fig. 4, the basic shape of the pressurizing member 300 is rectangular, which reduces the requirements on the mold during the manufacturing process, simplifies the mold opening process, and simplifies the manufacturing process compared to the annular and fan-shaped pressurizing members.

FIG. 5 is an exploded view of a transmission component according to an exemplary embodiment of the present application; FIG. 6 is a schematic illustration of an eccentric assembly according to an exemplary embodiment of the present application; fig. 7 is a schematic diagram of a balance assembly according to an example embodiment of the present application.

As shown in fig. 5, the transmission assembly 100 includes a drive shaft 110, an eccentric assembly 120, a balance assembly, a set of bearings 140, and a second end cap 150. Wherein the eccentric assembly 120 may be a set of eccentric sleeves connected to the driving shaft 110 to rotate with the driving shaft 100. As shown in fig. 6, the eccentric assembly 120 includes a first eccentric 121, a second eccentric 122, and a third eccentric 123 arranged in sequence along the driving shaft 110. The eccentricities of the third eccentric wheel 123 and the first eccentric wheel 121 are consistent; the second eccentric 122 is eccentric opposite to the first eccentric 121, i.e. 180 ° out of phase. Because the phase difference between the second eccentric wheel 122 and the first eccentric wheel 121 and the third eccentric wheel 122 is 180 degrees during the rotation of the eccentric assembly 120, the generated eccentric forces are mutually counteracted and are in moment balance, and the vibration can be further eliminated.

As shown in fig. 5 and 7, balance assembly 130 is connected to eccentric assembly 120 through a set of bearings 140, and rotation of eccentric assembly 120 causes balance assembly 130 to oscillate along the radial direction of driving shaft 110. Balance assembly 130 includes first balance 131, second balance 132, and third balance 133 in this order along drive shaft 110. Wherein, the first balance 131 is connected with the first eccentric wheel 121; a second balance 132 is connected to the second eccentric 122; a third balance 133 is connected to said third eccentric 123. The third balance 133 and the first balance 131 swing in the same direction; the second balance 132 oscillates in the opposite direction to the first balance 131, i.e. 180 ° out of phase. According to an example embodiment of the present application, first balance 131 and third balance 133 may be small balances and second balance 132 may be a large balance. In the process of swinging the swinging assembly 130, the phase difference between the second balance 132 and the first balance 131 and the third balance 132 is 180 °, so that the generated radial eccentric forces are mutually offset and balanced, and further the vibration can be further eliminated.

As shown in fig. 7, a set of swing arms 134 is fixed to each of the first balance 131, the second balance 132, and the third balance 133. In the oscillating process of the balance wheel assembly 130, the oscillating arm 134 is connected with the diaphragm through the adapter in the pressurizing component to drive the diaphragm to deform in the radial direction, so that the expansion or compression is performed.

FIG. 8 is an exploded view of a plenum member according to an exemplary embodiment of the present application; FIG. 9 is a schematic view of a piston chamber according to an exemplary embodiment of the present application; FIG. 10 is a schematic view of a diaphragm according to an exemplary embodiment of the present application; figure 11 is a schematic diagram of an adapter according to an example embodiment of the present application.

As shown in fig. 8, each pressurizing member 300 includes a piston chamber 310, a diaphragm 320, an adapter 330, a packing 340, a housing 350, a set of inlet check valves 360, and a set of outlet check valves 370. Wherein at least one pressurizing cavity is provided on the inner wall of the piston chamber 310. The diaphragm 320 and the piston chamber 310 are closed to form the at least one pressurizing cavity. The housing 350 and the sealing ring 340 are used to receive and seal the piston chamber 310. Diaphragm 320 is coupled to the balance assembly by adapter 330. The oscillation of the balance assembly drives diaphragm 320 through adapter 330 to deform in the radial direction of the drive shaft, expanding or compressing at least one pumping chamber in the radial direction. The piston chamber 310 and the diaphragm 320 may be integrated or assembled.

As shown in fig. 9, the piston chamber 310 is provided with a water inlet chamber 311, a water outlet chamber 312, and at least one pressurizing chamber, and is formed by closely adhering a diaphragm to the inner wall of the piston chamber 310. According to an example embodiment of the present application, the at least one plenum includes a first plenum 313, a second plenum 314, and a third plenum 315. The first pressurizing chamber 313 and the third pressurizing chamber 315 are small pressurizing chambers, and the second pressurizing chamber 314 is a large pressurizing chamber. An inlet chamber 311 and an outlet chamber 312 are provided at one end of the piston chamber 310. Each pressurizing cavity is provided with a water inlet 316 and a water outlet 317 which are respectively provided with a water inlet check valve 360 and a water outlet check valve 370.

As shown in fig. 10, diaphragm 320 includes a first deformation zone 323, a second deformation zone 324, and a third deformation zone 325, which correspond to first plenum 313, second plenum 314, and third plenum 315, respectively, of fig. 9. A set of protrusions 326 is provided on each deformation zone of the diaphragm 320. The projection 326 is connected to the swing arm of the balance by an adapter. As a result, first pressurizing chamber 313 in fig. 9 is deformed by first wobbler 131 in fig. 7 to deform first deformation region 323 of diaphragm 320 in fig. 10, thereby expanding or compressing radially; second pressurizing chamber 314 is radially expanded or compressed by second wobbler 132 in fig. 7 driving second deformation region 324 of diaphragm 320 in fig. 10 to deform; third pumping chamber 315 is radially expanded or compressed by third wobbler 133 of fig. 7 driving deformation of third deformation region 325 of diaphragm 320 of fig. 10.

As shown in fig. 8 and 11, the adapter 330 includes a first small adapter, a large adapter, and a second small adapter. The first small adapter is connected at one end to the projection 326 of the first deformation zone 323 of the diaphragm 320 in fig. 10 and at the other end to the oscillating arm 134 of the first balance 131 in fig. 7; one end of the large adapter is connected with the bulge 326 of the second deformation zone 324 of the diaphragm 320 in fig. 10, and the other end is connected with the swing arm 134 of the second balance 132 in fig. 7; the second small adapter is connected at one end to the projection 326 of the third deformation zone 325 of the diaphragm 320 in fig. 10 and at the other end to the oscillating arm 134 of the third balance 133 in fig. 7.

After the transmission member 300 of fig. 5 and the 4 pressurizing members 300 of fig. 8 are assembled, the pressurizing members 300 are arranged opposite to each other two by two along the axis of the rotating shaft 110. The oppositely arranged pressurizing cavities form a pair. The first pumping chamber 313 of the piston chamber 310 may be a first small pumping chamber, the second pumping chamber 314 may be a large pumping chamber, and the third pumping chamber 315 may be a second small pumping chamber. The third pressurizing cavity 315 and the first pressurizing cavity 313 expand or compress synchronously; the second pumping chamber 314 compresses or expands in opposition to the first pumping chamber 133. For example: when the first small pressurizing cavity and the second small pressurizing cavity expand, the large pressurizing cavity compresses; when the first small pressurizing cavity and the second small pressurizing cavity are compressed, the large pressurizing cavity expands.

FIG. 12 is a schematic view of a first end cap according to an example embodiment of the present application; FIG. 13 is a schematic illustration of a substrate according to an example embodiment of the present application.

As shown in fig. 12, the first end cap 410 is provided with a water inlet end 411 and a water outlet end 412. The end surface of the base 200 is provided with a first water outlet 201 and a first water inlet 202, which are assembled to connect with a water outlet end 412 and a water inlet end 411 of the first end cap 410, respectively. The four sides of the base 200 are respectively provided with a second water inlet 203 and a second water outlet 204, which are respectively connected with the water inlet cavity and the water outlet cavity of the piston chamber after being assembled, thereby forming a water inlet channel and a water outlet channel. In the working process, raw water enters from the water inlet end 411 of the first end cover 410 and forms a water inlet flow channel through the first water inlet 202 and the second water inlet 203 on the base body 200; then enters the water inlet cavity 311 through the water inlet of the piston chamber 310 in FIG. 9, and enters the pressurizing cavity 313 and/or the pressurizing cavity 314 and/or the pressurizing cavity 315 through the water inlet of the pressurizing cavity provided with the water inlet check valve; the pressurized water enters the water outlet cavity 312 from the water outlet of the pressurizing cavity provided with the water outlet check valve de. The pressurized water flows into the outlet flow channel formed by the second outlet hole 204 and the first outlet hole 201 of the base 200 through the outlet of the outlet cavity 312, and finally is discharged from the outlet end 412 of the first end cap 410. The application provides a pump head will intake the water end and go out the water end and set up in the one end of pump for product structure compactness more.

As shown in fig. 13, a first mounting hole 210, a second mounting hole 220 and a third mounting hole 230 are respectively formed on four sides of the base 200, and are respectively used for mounting a first adapter, a second adapter and a third adapter of the pressurizing member. The base 200 further includes a mounting base 240 disposed at an opposite end of the first end cap. When the pump head is assembled, the transmission component is installed inside the base body, and is connected and fixed with the second end cap of the transmission component through the installation seat 240.

Referring to fig. 3 and 4, in the operation process of the assembled pump head 1000, the eccentric rotation of the eccentric assembly 120 drives the balance wheel assembly 130 to perform radial reciprocating motion, the balance wheel assembly is connected to the diaphragm 320 through the adaptor 330, and the reciprocating motion of the balance wheel assembly 130 makes the deformation area of the diaphragm 320 perform radial expansion motion or compression motion. Eccentric assemblies 120 cancel each other out and are moment balanced during rotation, and resultant radial eccentric force generated by eccentric motion of balance assembly 130 is zero and is moment balanced. Each of the pressurizing chambers of the four rectangular pressurizing members 300 sequentially performs an expansion or compression motion. Each pumping chamber completes one expansion and compression cycle per rotation of drive shaft 110. The first balance 131, the third balance 133, and the second balance 132 move away from the axial center of the drive shaft 110 or close to the axial center at the same time, and the forces generated in the radial direction cancel each other out, so that the resultant force becomes zero.

For example, when the thin portions of the first eccentric wheel 121 and the third eccentric wheel 123 in fig. 6 rotate to the corresponding first wobbler 131 and the third wobbler 133 in fig. 4, the deformation regions of the diaphragm 320 corresponding to the first wobbler 131 and the third wobbler 133 are in the position close to the axis, and the volumes of the first pressurizing cavity and the third pressurizing cavity are the largest; the eccentric position of the second eccentric wheel 122 is opposite to that of the first eccentric wheel 121 and the third eccentric wheel 123, and meanwhile, the thinner part of the second eccentric wheel 122 rotates to the position of the second balance wheel 132, the corresponding deformation region of the diaphragm 320 is in a near-axis position, and the volume of the second pressurizing cavity is maximum.

Similarly, when the thick portions of the first eccentric wheel 121 and the third eccentric wheel 123 rotate to the corresponding first balance 131 and the third balance 133, the deformation regions of the diaphragm 320 corresponding to the first balance 131 and the third balance 133 are located at the positions far from the axis, and the volumes of the first pressurizing cavity and the third pressurizing cavity are minimum. Meanwhile, the thicker part of the second eccentric wheel 122 rotates to the position of the second balance 132, the deformation region of the corresponding diaphragm 320 is at the far axis position, and the volume of the second pressurizing cavity is minimum.

When the diaphragm 320 expands in the radial direction of the driving shaft 110, the water inlet check valve of the at least one pressurizing chamber is opened, and the source water is sucked into the at least one pressurizing chamber; when compressed in the radial direction of the driving shaft 110, the outlet check valve of the at least one pressurizing chamber is opened, and pressurized water is discharged.

According to another aspect of the present application, there is provided a membrane booster pump comprising a pump head of the above-described membrane booster pump.

According to another aspect of the present application, there is also provided a water treatment apparatus comprising the above-described diaphragm booster pump.

The application provides a diaphragm booster pump's pump head passes through eccentric subassembly rotation and drives the balance wheel and produce radial reciprocating motion to make diaphragm deformation direction be radial. Compare with traditional diaphragm booster pump, under the unchangeable condition of pump body volume and motor speed, the radial deformation of diaphragm can effectively increase diaphragm deformation area, increases the volume variable in pressure-increasing cavity to improve the flow of diaphragm booster pump. Secondly, the pump head of the diaphragm booster pump provided by the application is further improved on the structural forms of the piston chamber and the booster cavity, so that the requirements on a die are greatly reduced, and the manufacturing process is simplified. In addition, eccentric forces of the eccentric assemblies are mutually offset and balanced in torque in the rotating process, the first balance wheel, the third small balance wheel and the second balance wheel simultaneously deviate from the axis of the motor shaft or simultaneously move close to the axis, the forces applied in the radial direction are mutually offset, the resultant force is zero and the resultant torque is balanced, vibration and noise are greatly reduced, and the effect of relative silence can be achieved. In the pump head of the diaphragm booster pump that this application provided, will intake water end and go out the water end and improve for setting up in the one end of pump by the both ends of pump for product structure compactness more.

The embodiments of the present application are described in detail above. The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the technical solutions and the core ideas of the present application. Therefore, the person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of protection of the present application. In view of the above, the description should not be taken as limiting the application.

Claims

1. A pump head of a diaphragm booster pump, said pump head comprising:

a drive shaft;

2. A pump head for a diaphragm booster pump as claimed in claim 1, wherein the eccentric assemblies are 180 ° out of phase during rotation, the resulting eccentric forces cancelling out each other and being moment balanced.

3. A pump head of a membrane booster pump as claimed in claim 2,

the eccentric assembly comprises a first eccentric wheel, a second eccentric wheel and a third eccentric wheel which are sequentially arranged along the driving shaft; the eccentricity of the third eccentric wheel is consistent with that of the first eccentric wheel; the second eccentric is eccentric opposite to the first eccentric.

4. A pump head of a diaphragm booster pump according to claim 3, wherein the balance wheel assembly has zero resultant of the eccentric forces in the radial direction of the drive shaft during oscillation and is moment-balanced.

5. A pump head of a diaphragm booster pump according to claim 3, wherein the balance assembly comprises:

the first balance wheel is connected with the first eccentric wheel;

the second balance wheel is connected with the second eccentric wheel;

a third balance wheel connected with the third eccentric wheel;

6. A pump head for a diaphragm booster pump as claimed in claim 5, wherein the at least one booster chamber comprises:

7. A pump head of a membrane booster pump as claimed in claim 6,

the third pressurizing cavity and the first pressurizing cavity are synchronously expanded or compressed;

the second pressurizing cavity and the first pressurizing cavity compress or expand reversely.

8. A pump head of a diaphragm booster pump according to claim 6, wherein when the thin portions of the first and third eccentrics rotate to the corresponding first and third wobbles, the deformation regions of the diaphragm corresponding to the first and third wobbles are in a paraxial position, and the volumes of the first and third pressurizing chambers are maximum; the eccentric positions of the second eccentric wheel, the first eccentric wheel and the third eccentric wheel are opposite, meanwhile, the thinner part of the second eccentric wheel rotates to the position of the second balance wheel, the corresponding deformation area of the diaphragm is located at the position close to the axis, and the volume of the second pressurizing cavity is maximum.

9. A pump head of a diaphragm booster pump according to claim 6, wherein when the first and third eccentrics are rotated to the corresponding first and third wobbles at an eccentric thickness, deformation regions of the diaphragm corresponding to the first and third wobbles are located at a far axis position, and the volumes of the first and third pumping chambers are minimal; meanwhile, the thicker part of the second eccentric wheel rotates to the position of the second balance wheel, the corresponding deformation area of the diaphragm is positioned at the far axis position, and the volume of the second pressurizing cavity is the minimum.

10. A pump head for a diaphragm booster pump as claimed in claim 1, wherein the at least one pumping chamber of the four rectangular pumping members undergoes a sequential expansion or compression movement.

11. A pump head as claimed in claim 1, wherein the at least one pumping chamber completes one expansion and compression cycle per revolution of the drive shaft.

12. A pumphead for a membrane booster pump as claimed in claim 1, further comprising:

the first end cover is arranged at one end of the transmission component;

the water inlet end is arranged on the first end cover;

and the water outlet end is arranged on the first end cover.

13. A pump head for a diaphragm booster pump as claimed in claim 12, wherein the piston chamber further comprises:

the water inlet cavity is connected with the water inlet end;

and the water outlet cavity is connected with the water outlet end.

14. A pump head for a diaphragm booster pump as claimed in claim 13, wherein, as the diaphragm expands in the radial direction of the drive shaft, the inlet check valve of the at least one pumping chamber opens and source water is drawn into the at least one pumping chamber; when the water is compressed along the radial direction of the driving shaft, the water outlet one-way valve of the at least one pressurizing cavity is opened, and pressurized water is discharged.

15. A diaphragm booster pump, comprising:

a pump head of a membrane booster pump as claimed in any one of claims 1 to 14.

16. A water treatment device, comprising:

the membrane booster pump of claim 15.