Pump head structure and diaphragm type booster pump comprising same

Abstract

The invention relates to a pump head structure and a diaphragm type booster pump comprising the pump head structure, and relates to the technical field of booster pumps. Comprising a motor assembly, a transmission head assembly, a pump cover assembly, a diaphragm assembly, a valve seat assembly and a pump shell assembly. The pump shell assembly and the pump cover assembly are sequentially installed at the top end of the motor assembly from top to bottom through bolts, the valve seat assembly and the diaphragm assembly are arranged in a cavity formed by the pump shell assembly and the pump cover assembly, the valve seat assembly is located above the diaphragm assembly, and the transmission head assembly is located in a cavity formed by the pump cover assembly and the motor assembly. The top of the transmission head assembly penetrates through the pump cover assembly and is fixedly connected with the diaphragm assembly. The motor assembly converts rotation motion of the motor into reciprocating motion in the axis direction through the transmission head assembly, and the diaphragm assembly is driven to do reciprocating motion in the axis direction of the motor. The diaphragm assembly can move in the axis direction of the motor assembly, the stress of the diaphragm assembly is single, the spatial distortion phenomenon cannot occur in the movement process, and then the service life of the diaphragm assembly is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of booster pumps, in particular to a pump head structure and a diaphragm booster pump comprising the pump head. Background Art

[0002] Prior art booster pumps (such as Figure 1 , Figure 2 and Figure 3 As shown), or diaphragm pumps, are especially used in the water purification industry, and are mostly multi-cavity reciprocating swing structures, that is, the traditional transmission head drives the diaphragm to move. Under this structure, the movement of the diaphragm is a combination of swinging along the motor axis and swinging in the vertical direction, as well as tilting swinging, and the effective working movement of the diaphragm is only the swinging along the motor axis, that is, the diaphragm has a lot of invalid movement during the working process, which makes the whole pump low in efficiency and short in life.

[0003] In the prior art, booster pumps, or diaphragm pumps, are particularly used in industrial fluid transportation. When the diaphragm pump has a single cavity, it can achieve movement along the axial direction, but it has problems such as a small number of cavities, low flow, and large vibration.

[0004] Therefore, how to provide a pump head structure and a diaphragm booster pump including the pump head has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In order to solve at least one technical problem in the background technology, the present invention provides a pump head structure and a diaphragm booster pump including the pump head. Compared with the traditional booster pump, the diaphragm assembly can be moved along the axial direction of the motor assembly, so that the diaphragm assembly is subjected to a single force and no spatial distortion occurs during the movement, thereby greatly improving the service life of the diaphragm assembly.

[0006] To achieve the above-mentioned object, the present invention provides a pump head structure, comprising: a motor assembly, a transmission head assembly, a pump cover assembly, a diaphragm assembly, a valve seat assembly and a pump housing assembly;

[0007] The top of the motor assembly is sequentially installed with a pump housing assembly and a pump cover assembly from top to bottom by bolts, the valve seat assembly and the diaphragm assembly are arranged in a cavity formed by the pump housing assembly and the pump cover assembly, and the valve seat assembly is located above the diaphragm assembly, the transmission head assembly is located in a cavity formed by the pump cover assembly and the motor assembly, and the top of the transmission head assembly passes through the pump cover assembly and is fixedly connected to the diaphragm assembly;

[0008] The motor assembly converts the rotational motion of the motor into reciprocating motion along the axis direction through the transmission head assembly, driving the diaphragm assembly to reciprocate along the axis direction of the motor.

[0009] Furthermore, the motor assembly includes a motor body and a front end cover, the front end cover is installed on the top end of the motor body, and the transmission shaft of the motor body passes through the front end cover.

[0010] Furthermore, the transmission head assembly includes an eccentric wheel, a transmission disc, a transmission block 1, a transmission block 2 and a piston-type driven transmission head. The bottom end of the eccentric wheel is connected to the transmission shaft, and the top end extends into the center hole of the transmission disc. The transmission disc is embedded in an annular groove opened on the inner side of the piston-type driven transmission head. The transmission block 1 is arranged between the bottom wall of the annular groove and the transmission disc, and the transmission block 2 is arranged between the top wall of the annular groove and the transmission disc.

[0011] Furthermore, the transmission head assembly also includes a bearing, and the bearing is arranged between the eccentric wheel and the center hole of the transmission disc.

[0012] Furthermore, the portion of the piston-driven transmission head between the transmission disc and the diaphragm is the upper guide portion of the transmission head; the portion of the piston-driven transmission head between the transmission disc and the front end cover of the motor is the lower guide portion of the transmission head; the guide portion on the transmission head is placed in the upper guide groove on the inner side of the pump cover assembly, and the lower guide portion of the transmission head is placed in the lower guide groove of the front end cover.

[0013] Further, the diaphragm assembly has a first diaphragm surface matched with the piston-driven transmission head and a second diaphragm surface matched with the valve seat assembly; the valve seat assembly has a first valve seat surface adjacent to the diaphragm assembly, a second valve seat surface adjacent to the surrounding cavity inside the pump housing, and a third valve seat surface adjacent to the central cavity inside the pump housing assembly; the pump housing assembly has a first pump housing surface adjacent to the second surface of the valve seat assembly, a second pump housing surface adjacent to the third valve seat surface, and a third pump housing surface in contact with the external atmosphere;

[0014] The first surface of the valve seat and the second surface of the diaphragm together form a pressurization chamber;

[0015] The second surface of the valve seat and the first surface of the pump housing together form a water inlet cavity;

[0016] The third surface of the valve seat and the second surface of the pump housing together form a water outlet cavity.

[0017] Furthermore, the transmission block 1 and the transmission block 2 are both structures for transmitting force, and their shapes include spherical, hemispherical, square, and diamond.

[0018] A diaphragm booster pump comprises the pump head structure described in any one of the above items.

[0019] Beneficial effects of the present invention:

[0020] Compared with the traditional booster pump, the present invention converts the rotational motion of the motor assembly into the reciprocating motion of the transmission head assembly along the axis, and then the transmission head assembly drives the diaphragm assembly to reciprocate along the motor axis, so that the diaphragm assembly is subjected to a single force, and no spatial distortion occurs during the movement, thereby greatly improving the service life of the diaphragm assembly; and under the same booster pump size and the same eccentric wheel angle (or the same stroke), the single-turn flow rate (volumetric efficiency) of the water pump can be increased by 20% or more, greatly reducing the cost of the entire pump and the power of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded view of an existing product;

[0022] Figure 2 It is a partial cross-sectional view of an existing product;

[0023] Figure 3 Rotated section view of existing products;

[0024] Figure 4 It is the spatial trajectory of any point in the X / Y / Z directions where the transmission head and the diaphragm assembly of the existing product are matched;

[0025] Figure 5 An exploded view of the present invention;

[0026] Figure 6 It is a partial cross-sectional view of the present invention;

[0027] Figure 7 It is a rotated cross-sectional view of the present invention;

[0028] Figure 8 An exploded view of a transmission head assembly according to an embodiment of the present invention;

[0029] Fig. 9 An exploded view of a transmission head assembly in another embodiment of the present invention;

[0030] Fig.10 This is a schematic diagram of the three-cavity structure of the piston-driven transmission head of the present invention;

[0031] Fig.11 This is a schematic diagram of the 4-cavity structure of the piston-driven transmission head of the present invention;

[0032] Fig.12 This is a schematic diagram of the 5-cavity structure of the piston-driven transmission head of the present invention;

[0033] Fig.13 This is a schematic diagram of the 6-cavity structure of the piston-driven transmission head of the present invention;

[0034] Fig.14 This is a schematic diagram of the 7-cavity structure of the piston-driven transmission head of the present invention;

[0035] Fig.15 This is a schematic diagram of the structure of the 8-cavity piston-driven transmission head of the present invention;

[0036] Fig.16 It is the spatial trajectory in the three directions of X / Y / Z of any point where the transmission head and the diaphragm assembly of the present invention cooperate.

[0037] Among them, in the figure:

[0038] 1. Motor assembly, 2. Transmission head assembly, 3. Pump cover assembly, 4. Diaphragm assembly, 5. Valve seat assembly, 6. Pump housing assembly, 7. Eccentric wheel, 8. Bearing, 9. Transmission block 1, 10. Transmission plate, 11. Transmission block 2, 12. Piston drive transmission head. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0042] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0043] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] like Figure 5-7 As shown, the present invention provides a pump head structure, comprising: a motor assembly 1, a transmission head assembly 2, a pump cover assembly 3, a diaphragm assembly 4, a valve seat assembly 5 and a pump housing assembly 6;

[0045] The top of the motor assembly 1 is sequentially installed with a pump housing assembly 6 and a pump cover assembly 3 from top to bottom by bolts, the valve seat assembly 5 and the diaphragm assembly 4 are arranged in a cavity formed by the pump housing assembly 6 and the pump cover assembly 3, and the valve seat assembly 5 is located above the diaphragm assembly 4, the transmission head assembly 2 is located in a cavity formed by the pump cover assembly 3 and the motor assembly 1, and the top of the transmission head assembly 2 passes through the pump cover assembly 3 and is fixedly connected to the diaphragm assembly 4;

[0046] The motor assembly 1 converts the rotational motion of the motor into reciprocating motion along the axial direction through the transmission head assembly 2, driving the diaphragm assembly 4 to reciprocate along the axial direction of the motor. The boosting chamber is pressurized by continuously changing its volume, thereby generating a continuous supply of high-pressure water for output work.

[0047] The motor assembly 1 includes a motor body and a front end cover, wherein the front end cover is mounted on the top of the motor body, and a transmission shaft of the motor body passes through the front end cover.

[0048] In one embodiment, if Figure 8As shown, the transmission head assembly 2 includes an eccentric wheel 7, a transmission disc 10, a transmission block 19, a transmission block 2 11 and a piston-driven transmission head 12. The bottom end of the eccentric wheel 7 is connected to the transmission shaft, and the top end extends into the center hole of the transmission disc 10. The transmission disc 10 is embedded in an annular groove opened on the inner side of the piston-driven transmission head 12. The transmission block 19 is arranged between the bottom wall of the annular groove and the transmission disc 10, and the transmission block 2 11 is arranged between the top wall of the annular groove and the transmission disc 10. The eccentric wheel 7 is directly matched with the transmission disc 10 to convert the rotational motion of the transmission shaft of the motor assembly 1 into the reciprocating swinging motion of the transmission disc 10, thereby driving other accessories therewith to perform corresponding operations to transmit the power of the motor assembly 1.

[0049] In another embodiment, if Fig. 9 As shown, the transmission head assembly 2 also includes a bearing 8, which is arranged between the eccentric wheel 7 and the center hole of the transmission disc 10. The transmission shaft of the motor assembly 1 converts the rotational motion of the transmission shaft into the up and down swing of the transmission disc 10 through the transmission disc 10 assembly. At the same time, due to the effect of the bearing 8, the transmission disc 10 is allowed to rotate around the transmission shaft at a lower speed. The force on the entire force-bearing surface of the transmission disc 10 is uniform, and the service life of the transmission disc 10 is improved. While transmitting the power of the motor body, the bearing 8 bears more rotational motion, so that the transmission disc 10 does not need to rotate synchronously with the transmission shaft of the motor assembly 1, thereby greatly reducing the static friction between the transmission disc 10 and the transmission block 1 9 and the transmission block 2 11, and greatly improving the noise and surface wear caused by static friction. Improving surface wear can reduce ineffective work and thus improve overall efficiency; at the same time, improving surface wear can greatly increase the life of the transmission disc 10, so that the transmission disc 10 can operate under more severe working conditions, such as operating under conditions with less lubricating oil or no lubricating oil, greatly improving the scope of application.

[0050] To further optimize the technical solution, the portion of the piston-driven transmission head 12 between the transmission disc 10 and the diaphragm is the upper guide portion of the transmission head; the portion of the piston-driven transmission head 12 between the transmission disc 10 and the front end cover of the motor is the lower guide portion of the transmission head; the guide portion of the transmission head is placed in the upper guide groove on the inner side of the pump cover assembly 3, and the lower guide portion of the transmission head is placed in the lower guide groove of the front end cover. Thus, the piston-driven transmission head 12 is limited to move and rotate only along the main axis direction of the motor assembly 1; at the same time, since the piston-driven transmission head 12 is connected to the diaphragm assembly 4 by screws and other limiters, the rotational movement of the piston-driven transmission head 12 is restricted. In addition, the guide groove can be only the upper guide groove, or only the lower guide groove, or a combination of multiple guide grooves, as long as the guiding movement of the piston-driven transmission head 12 can be achieved.

[0051] The piston-driven transmission head 12 can be in multiple combinations, and the commonly used combinations are recommended to be 3, 4, 5, 6, 7, and 8. Figure 10-15 For example, if five piston-driven transmission heads 12 are used, the five piston-driven transmission heads 12 can be placed in five holes of the pump cover at equal intervals, and when the transmission plate 10 reciprocates, the five piston-driven transmission heads 12 are driven to reciprocate in sequence. The upper surface of the piston-driven transmission head 12 can be any shape, including but not limited to special-shaped, circular, elliptical, etc.

[0052] There are many ways to fix the diaphragm assembly 4 and the piston-driven transmission head 12. The commonly used method in the present invention is screw fixing. Other fixing methods can also be used, including gluing fixing, interference fixing, riveting fixing, undercut fixing, etc.

[0053] To further optimize the technical solution, the diaphragm assembly 4 has a first diaphragm surface that cooperates with the piston-driven transmission head 12 and a second diaphragm surface that cooperates with the valve seat assembly 5; the valve seat assembly 5 has a first valve seat surface adjacent to the diaphragm assembly 4, a second valve seat surface adjacent to the surrounding cavity inside the pump casing, and a third valve seat surface adjacent to the central cavity inside the pump casing assembly 6; the pump casing assembly 6 has a first pump casing surface adjacent to the second surface of the valve seat assembly 5, a second pump casing surface adjacent to the third valve seat surface, and a third pump casing surface in contact with the external atmosphere.

[0054] The first surface of the valve seat and the second surface of the diaphragm together form a pressurization chamber;

[0055] The second surface of the valve seat and the first surface of the pump housing together form a water inlet cavity;

[0056] The third surface of the valve seat and the second surface of the pump housing together form a water outlet cavity.

[0057] To further optimize the technical solution, the transmission block 1 9 and the transmission block 2 11 are both structures for transmitting force, and their shapes include spherical, hemispherical, special-shaped, square, diamond and other shapes.

[0058] For applications with larger loads, both the transmission block 1 9 and the transmission block 2 11 are hemispherical structures. That is, the whole sphere is divided into multiple hemispheres according to certain proportions and structural requirements, such as 1 / 2 hemisphere, 1 / 3 hemisphere and other proportions. The hemisphere consists of a curved surface 1 and a flat surface 2; the surface 2 of the hemisphere, where it contacts the transmission disc 10, is a flat structure, so that it can withstand greater forces or large loads, expanding the application occasions.

[0059] For applications with smaller loads, transmission block 1 9 and transmission block 2 11 can adopt a whole spherical ball structure, such as the spherical rolling body structure in the bearing 8. Under this structure, the transmission block 1 9 and transmission block 2 11 are in point contact or line contact with the transmission disk 10, so that the pressure-bearing surface is greatly reduced compared with the hemisphere, that is, it can only bear a relatively small load; in addition, the friction between the transmission block 1 9 and transmission block 2 11 and the transmission disk 10 is converted into rolling friction, thereby increasing the life of the transmission disk 10 and reducing the power consumption of the whole machine.

[0060] For other application scenarios, the structural form of transmission block 1 9 and transmission block 2 11 is not limited. The functions of transmission block 1 9 and transmission block 2 11 can complete the conversion of relative motion mentioned in the present invention, that is, converting the swinging motion of the transmission disk 10 into the linear motion of the piston along the axial direction, and their structures are all within the protection scope of the present invention.

[0061] In yet another embodiment, a diaphragm booster pump is provided, comprising the above-mentioned pump head structure.

[0062] Compared with the traditional booster pump, the present invention converts the rotational motion of the motor assembly into the reciprocating motion of the transmission head assembly along the axis, and then the transmission head assembly drives the diaphragm assembly to reciprocate along the motor axis, so that the diaphragm assembly is subjected to a single force, and there will be no spatial distortion during the movement, thereby greatly improving the service life of the diaphragm assembly. At the point where the transmission head and the diaphragm assembly of the existing product cooperate, the spatial trajectory of any point in the three directions of X / Y / Z is as follows Figure 4 As shown; the motion trajectory of any point in the space X, Y, and Z directions on the diaphragm connected to the piston-driven transmission head of the present invention is as follows Fig.16 And under the same booster pump size, the same eccentric wheel angle (or the same stroke), the single-turn flow rate (volumetric efficiency) of the water pump can be increased by 20% or more, greatly reducing the cost of the entire pump and the power of the entire machine.

[0063] Because the flow rate of the booster pump = single-turn flow rate * motor speed;

[0064] a) Compared with traditional booster pumps, the single-turn flow rate is increased by more than 20%. That is, under the same premise, when the drive shaft of the motor assembly rotates only one circle as a year-on-year consideration, the flow rate can generally be increased by more than 20%;

[0065] b) Compared with the traditional booster pump, when the booster pump reaches the same water output, the motor component speed of the booster pump of the present invention is reduced by about 20% compared with the traditional booster pump speed, which greatly reduces the motor component speed and increases the service life of the motor component carbon brush;

[0066] c) Compared with the traditional booster pump, when the booster pump reaches the same water output, the speed of the booster pump of the present invention is reduced by 20%, and the reciprocating frequency of the diaphragm is reduced by 20%, that is, the bending fatigue frequency of the diaphragm is greatly reduced, thereby greatly improving the service life;

[0067] d) Compared with the traditional booster pump, when the booster pump reaches the same water output, the rotation speed of the booster pump of the present invention is reduced by 20%, which greatly reduces the vibration frequency of the motor component and reduces the vibration noise of the whole machine.

[0068] Compared with the traditional booster pump, the present invention improves the single-turn flow rate by more than 20%. When the same flow rate is achieved, the volume of the booster pump can be reduced by 20% in theory, thereby greatly reducing the material cost.

[0069] Compared with the traditional booster pump, the present invention increases the single-turn flow rate by more than 20%. When the same flow rate is achieved, the volume of the booster pump can theoretically be reduced by 20%, which greatly reduces the volume of the booster pump, i.e., the volume is small and the weight is light, which can save more installation space for the whole machine and facilitate installation.

[0070] Compared with the traditional booster pump, the present invention increases the single-turn flow rate by more than 20%. When the same flow rate is achieved, the effective power of the entire booster pump is greatly improved, thereby reducing the power consumption of the booster pump and saving electric energy; at the same time, the power of the power supply switching power supply is reduced, that is, the cost of the switching power supply is reduced, thereby further reducing the cost of the entire machine and improving brand competitiveness.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pump head structure, characterized in that: include: Motor assembly, transmission head assembly, pump cover assembly, diaphragm assembly, valve seat assembly and pump housing assembly; The top of the motor assembly is sequentially installed with a pump housing assembly and a pump cover assembly from top to bottom by bolts, the valve seat assembly and the diaphragm assembly are arranged in a cavity formed by the pump housing assembly and the pump cover assembly, and the valve seat assembly is located above the diaphragm assembly, the transmission head assembly is located in a cavity formed by the pump cover assembly and the motor assembly, and the top of the transmission head assembly passes through the pump cover assembly and is fixedly connected to the diaphragm assembly; The motor assembly converts the rotational motion of the motor into reciprocating motion along the axis direction through the transmission head assembly, driving the diaphragm assembly to reciprocate along the axis direction of the motor.

2. A pump head structure as claimed in claim 1, characterized in that: The motor assembly comprises a motor body and a front end cover, wherein the front end cover is mounted on the top end of the motor body, and a transmission shaft of the motor body passes through the front end cover.

3. A pump head structure as claimed in claim 2, characterized in that: The transmission head assembly includes an eccentric wheel, a transmission disc, a transmission block 1, a transmission block 2 and a piston-driven transmission head. The bottom end of the eccentric wheel is connected to the transmission shaft, and the top end extends into the center hole of the transmission disc. The transmission disc is embedded in an annular groove opened on the inner side of the piston-driven transmission head. The transmission block 1 is arranged between the bottom wall of the annular groove and the transmission disc, and the transmission block 2 is arranged between the top wall of the annular groove and the transmission disc.

4. A pump head structure as claimed in claim 3, characterized in that: The transmission head assembly also includes a bearing, which is arranged between the eccentric wheel and the center hole of the transmission disc.

5. A pump head structure as claimed in claim 3 or 4, characterized in that: The portion of the piston-driven transmission head between the transmission disc and the diaphragm is the upper guide portion of the transmission head; the portion of the piston-driven transmission head between the transmission disc and the front end cover of the motor is the lower guide portion of the transmission head; the upper guide portion of the transmission head is placed in the upper guide groove on the inner side of the pump cover assembly, and the lower guide portion of the transmission head is placed in the lower guide groove of the front end cover.

6. A pump head structure as claimed in claim 3 or 4, characterized in that: The diaphragm assembly has a first diaphragm surface matched with the piston-driven transmission head and a second diaphragm surface matched with the valve seat assembly; the valve seat assembly has a first valve seat surface adjacent to the diaphragm assembly, a second valve seat surface adjacent to the surrounding cavity inside the pump housing, and a third valve seat surface adjacent to the central cavity inside the pump housing assembly; the pump housing assembly has a first pump housing surface adjacent to the second surface of the valve seat assembly, a second pump housing surface adjacent to the third valve seat surface, and a third pump housing surface in contact with the external atmosphere; The first surface of the valve seat and the second surface of the diaphragm together form a pressurization chamber; The second surface of the valve seat and the first surface of the pump housing together form a water inlet cavity; The third surface of the valve seat and the second surface of the pump housing together form a water outlet cavity.

7. A pump head structure as claimed in claim 3 or 4, characterized in that: The transmission block 1 and the transmission block 2 are both structures for transmitting force, and their shapes include sphere, hemisphere, square and diamond.

8. A diaphragm booster pump, characterized in that: The pump head structure comprises the pump head structure according to any one of claims 1 to 7.

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