Diaphragm and diaphragm assembly

Abstract

The diaphragm comprises a diaphragm body, a first groove is formed in the front face of the diaphragm body, a plurality of protruding structures are arranged on the back face of the diaphragm body, a plurality of second grooves are formed in the groove bottom wall of the first groove, and the second grooves are formed in the groove bottom wall of the second groove. Each second groove corresponds to one protruding structure, a mounting hole is formed in the groove bottom wall of each second groove, each mounting hole penetrates through one corresponding protruding structure, at least one positioning column is arranged on the inner wall of each second groove, and the positioning columns are used for allowing a piston to be inserted and positioned. The piston is positioned through the positioning column, the installation difficulty of the piston is reduced, when the piston needs to be installed, the piston is firstly inserted into the positioning column and positioned, then the piston is fixedly connected with the piston frame through the piston connecting piece, and the installation difficulty of the piston is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of booster pumps, in particular to a diaphragm and a diaphragm assembly. Background Art

[0002] Currently, water purifiers are often equipped with a booster pump. The booster pump head typically includes a piston rack, a bracket, a diaphragm, a piston, a diaphragm chamber, and a pump head cover, arranged in order from bottom to top. The diaphragm is located between the piston and the piston rack. The booster pump operates by rotating an inclined eccentric cam driven by a motor, which in turn drives the piston rack and its balance wheel to swing up and down. The diaphragm elastically deforms with the swing of the balance wheel, causing the volume of the booster chamber to change, thus achieving the process of water suction, boosting, and draining. In the prior art, the diaphragm is provided with a positioning structure. When the piston passes through the diaphragm and connects to the balance wheel on the piston rack, the piston is difficult to position, making its installation difficult. Utility Model Content

[0003] The purpose of the utility model is to provide a diaphragm and a diaphragm assembly to solve the technical problem in the prior art that the diaphragm is provided with a positioning structure, and when the piston passes through the diaphragm and is connected to the balance wheel on the piston rack, it is difficult to position the piston, resulting in great difficulty in installing the piston.

[0004] The utility model provides a diaphragm, including a diaphragm body, wherein a first groove is provided on the front side of the diaphragm body, and a plurality of raised structures are provided on the back side of the diaphragm body. A plurality of second grooves are provided on the bottom wall of the first groove, and each second groove is provided corresponding to one of the raised structures. A mounting hole is provided on the bottom wall of the second groove, and each mounting hole penetrates a corresponding one of the raised structures. At least one positioning post is provided on the inner wall of each second groove, and the positioning post is used for inserting and positioning a piston. By providing the positioning post to position the piston, the difficulty of installing the piston is reduced. When the piston needs to be installed, the piston is first inserted into the positioning post to position the piston, and then the piston is fixedly connected to the piston frame through the piston connector, which reduces the difficulty of installing the piston.

[0005] In the diaphragm described above, the sidewalls of the second groove are arcuate walls that gradually converge from the periphery toward the center. The end of the arcuate wall closest to the center of the diaphragm body is triangular, while the end of the arcuate wall farther from the center of the diaphragm body is spherical. The positioning post is disposed on the arcuate wall. The arcuate wall is a curved structure that is wider at the top and narrower at the bottom. The piston is provided with a chamfered portion. With this arrangement, when the piston is installed in the second groove, it expands from the inside out during downward movement, thereby achieving a better seal at the connection between the piston and the diaphragm. The provision of the arcuate wall can compensate for manufacturing precision errors, facilitate manual or machine installation, and facilitate installation of the piston in the second groove. It also reduces processing difficulty and maintains sealing reliability.

[0006] In the diaphragm as described above, two spaced-apart positioning posts are provided in each of the second grooves, and the distance between the central axes of the two positioning posts is 3 mm-5 mm.

[0007] As for the diaphragm described above, the number of the second grooves is six, and the number of the protruding structures is also six. The six second grooves and the six protruding structures are evenly distributed along the circumference and are respectively located on the upper and lower sides of the diaphragm body.

[0008] In the diaphragm as described above, the second groove is a teardrop-shaped structure, and the tip of the second groove faces the center of the diaphragm body.

[0009] As for the diaphragm described above, a third groove is formed on the bottom wall of the second groove, the central axis of the third groove coincides with the central axis of the mounting hole, and the third groove is used for mounting a piston sealing ring.

[0010] As for the diaphragm described above, a plurality of radially distributed ribs are provided on the bottom wall of the first groove, and the plurality of ribs divide the diaphragm body into a plurality of piston actuation areas, and each of the piston actuation areas has a second groove for mounting a piston.

[0011] As for the diaphragm described above, an annular rib is provided in the middle of the bottom wall of the first groove, and a plurality of radially distributed ribs are connected to the outer side wall of the annular rib.

[0012] As for the diaphragm described above, a fourth groove is formed on the bottom wall of the protruding structure, and the fourth groove surrounds the mounting hole.

[0013] The utility model also provides a diaphragm assembly, comprising the diaphragm as described above.

[0014] The implementation of the present invention will have the following beneficial effects:

[0015] In the present invention, the diaphragm includes a diaphragm body, a first groove is provided on the front side of the diaphragm body, a plurality of raised structures are provided on the back side of the diaphragm body, a plurality of second grooves are provided on the bottom wall of the first groove, each second groove is provided corresponding to a raised structure, a mounting hole is provided on the bottom wall of the second groove, each mounting hole penetrates a corresponding raised structure, and at least one positioning post is provided on the inner wall of each second groove, the positioning post being used for inserting and positioning a piston. Positioning the piston by providing the positioning post reduces the difficulty of installing the piston. When the piston needs to be installed, the piston is first inserted into the positioning post to position the piston, and then the piston is fixedly connected to the piston frame via the piston connector, reducing the difficulty of installing the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a schematic structural diagram of a diaphragm according to an exemplary embodiment;

[0018] Figure 2 is a schematic structural diagram of a diaphragm from another perspective according to an exemplary embodiment;

[0019] Figure 3 is a front cross-sectional view of a diaphragm according to an exemplary embodiment;

[0020] Figure 4 is a schematic structural diagram of a diaphragm assembly according to an exemplary embodiment.

[0021] Among them: 1. Diaphragm body; 11. Protrusion structure; 111. Fourth groove; 12. First groove; 13. Second groove; 131. Arc wall; 132. Positioning column; 14. Third groove; 15. Rib; 16. Annular rib; 17. Mounting hole; 2. Piston; 3. Piston connector. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore should not be understood as a limitation on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] Existing booster pumps typically consist of a piston rack, bracket, diaphragm, piston, diaphragm chamber, and pump head cover, arranged in ascending order. The diaphragm is located between the piston and the piston rack. The booster pump operates as follows: a motor drives the tilted eccentric cam to rotate, which in turn drives the piston rack and its associated balance wheel to swing up and down. The diaphragm elastically deforms with the swing of the balance wheel, causing the volume of the booster chamber to change, achieving the process of water suction, boosting, and draining. In existing technologies, the diaphragm is equipped with a positioning structure. This makes it difficult to position the piston after it passes through the diaphragm and connects to the balance wheel on the piston rack, making its installation difficult.

[0028] See also Figures 1-4The present invention provides a diaphragm, including a diaphragm body 1. The front side of the diaphragm body 1 is provided with a first groove 12, and the back side of the diaphragm body 1 is provided with a plurality of raised structures 11. The bottom wall of the first groove 12 is provided with a plurality of second grooves 13, each of which is corresponding to one of the raised structures 11. The bottom wall of the second groove 13 is provided with a mounting hole 17, each of which passes through a corresponding one of the raised structures 11. The inner wall of each second groove 13 is provided with at least one positioning post 132, and the positioning post 132 is used for inserting and positioning a piston 2. When the piston 2 needs to be installed, the piston 2 is first inserted into the positioning post 132 to position the piston 2, and then the piston 2 is fixedly connected to the piston 2 frame through the piston connector 3, thereby reducing the difficulty of installing the piston 2.

[0029] Furthermore, the sidewalls of the second groove 13 are arcuate walls 131 that gradually converge from the periphery toward the center. The end of the arcuate wall 131 near the center of the diaphragm body 1 is triangular, while the end of the arcuate wall 131 away from the center of the diaphragm body 1 is spherical. The positioning post 132 is disposed on the arcuate wall 131. The arcuate wall 131 is an arc-shaped structure that is wider at the top and narrower at the bottom. The piston 2 is provided with a chamfered portion. With this arrangement, when the piston 2 is installed in the second groove 13, it expands from the inside out during downward movement, thereby achieving a better seal at the connection between the piston 2 and the diaphragm. The provision of the arcuate wall 131 can compensate for manufacturing precision errors, facilitate manual or machine installation, and facilitate installation of the piston 2 in the second groove 13. It also reduces the difficulty of processing and maintains a reliable seal.

[0030] In an optional embodiment, the width of the second groove 13 at the top is 18 mm, and the length is 20.665 mm. The outer end of the second groove 13 is a semicircular structure, and the inner end of the second groove 13 is an inwardly protruding structure.

[0031] Furthermore, each second groove 13 is provided with two spaced-apart positioning posts 132, and the distance between the center axes of the two positioning posts 132 is 3 mm to 5 mm. In a specific embodiment, the diameter of the positioning posts 132 is 2 mm, and the distance between the center axes of the two positioning posts 132 in the same second groove 13 is 4 mm. Each piston 2 is provided with two positioning holes, each having the same diameter as the positioning posts 132. The two positioning posts 132 in the same second groove 13 are respectively inserted into the two positioning holes on each piston 2, thereby achieving a better positioning effect for the piston 2.

[0032] Furthermore, the number of the second grooves 13 is six, and the number of the protrusions 11 is also six. The six second grooves 13 and the six protrusions 11 are evenly distributed along the circumference and are respectively located on the upper and lower sides of the diaphragm body 1. Specifically, the angle between each two adjacent second grooves 13 is 60°, which is used to accommodate six pistons 2 to form a six-chamber booster pump. In some other embodiments, the number of the second grooves 13 can also be seven, eight, or other values ​​to form a seven-chamber booster pump, an eight-chamber booster pump, or a booster pump with another number of chambers.

[0033] Furthermore, the second groove 13 is a teardrop-shaped structure, and the tip of the second groove 13 is oriented toward the center of the diaphragm body 1. The second grooves 13 are evenly distributed circumferentially. Since the inner and outer diameters of the diaphragm body 1 are different, for example, the second groove 13 is a circular structure with the inner and outer sections of the second groove 13 being the same size, the inner circumference of the diaphragm body 1 is shorter, so that the number of second grooves 13 that can be provided on the diaphragm body 1 is small, and the number of pistons 2 that can be installed on the diaphragm body 1 is small. If the number of second grooves 13 is to be increased, the volume of the diaphragm body 1 will have to be increased, which is not conducive to the installation and use of the diaphragm body 1. However, the second groove 13 of the present application is designed as a teardrop-shaped structure, and the tip of the second groove 13 is oriented toward the center of the diaphragm body 1. More second grooves 13 can be provided on the diaphragm body 1 of the same size to accommodate more pistons 2, thereby increasing the number of chambers of the booster pump without increasing the volume of the booster pump, which is conducive to the installation and use of the booster pump.

[0034] Furthermore, a third groove 14 is defined on the bottom wall of the second groove 13. The central axis of the third groove 14 coincides with the central axis of the mounting hole 17. The third groove 14 is used to mount a piston seal ring, which seals the connection between the piston 2 and the diaphragm. In a specific embodiment, the piston seal ring is injection molded from EPDM, nitrile rubber, or silicone rubber. The rubber can cushion the force applied to the diaphragm, thereby extending its service life.

[0035] In a specific embodiment, the piston sealing ring is a special-shaped sealing ring that fits the shape of the piston better, so that a better sealing effect is achieved at the connection between the piston and the diaphragm body.

[0036] Furthermore, the bottom wall of the first groove 12 is provided with a plurality of radially distributed ribs 15. These ribs 15 divide the diaphragm body 1 into a plurality of piston 2 actuation zones. Each piston 2 actuation zone has a second groove 13 for receiving the piston 2. Specifically, the height of the ribs 15 is less than the depth of the first groove 12. The ribs 15 are configured to be inserted into the diaphragm chamber to form a plurality of sealed chambers.

[0037] Specifically, the outer peripheral wall of the diaphragm body 1 is a petal-shaped structure composed of a plurality of arc-shaped walls 131 , and each of the arc-shaped walls 131 and two adjacent ribs 15 together form an actuating area of ​​the piston 2 .

[0038] Furthermore, an annular rib 16 is provided in the middle of the bottom wall of the first groove 12, and a plurality of radially distributed ribs 15 are connected to the outer side wall of the annular rib 16. The height of the annular rib 16 is the same as that of the ribs 15, and the annular rib 16 is also used for plugging into the diaphragm chamber.

[0039] Furthermore, a fourth groove 111 is formed on the bottom wall of the raised structure 11, and the fourth groove 111 surrounds the mounting hole 17. In an optional embodiment, the diaphragm is made of thermoplastic rubber injection molding, which makes the diaphragm more resistant to pulling and has a long service life. The raised structure 11 and the diaphragm body 1 are an integral injection molding structure and can undergo a certain degree of deformation. When the piston 2 connecting piece passes through the diaphragm and is connected to the balance wheel at the lower end, it squeezes the diaphragm. Under the action of external force, the raised structure 11 undergoes a certain degree of deformation to fit tightly against the balance wheel, thereby achieving a sealed connection between the diaphragm and the balance wheel.

[0040] Specifically, a coating layer is provided on the bottom wall of the diaphragm body 1, and a plurality of avoidance holes are provided on the coating layer for the protruding structure 11 to pass through. When the diaphragm is connected to the balance wheel, the coating layer is pressed against the top wall of the balance wheel to avoid a gap between the bottom wall of the diaphragm and the top wall of the balance wheel, thereby further improving the sealing of the connection between the diaphragm and the balance wheel and avoiding water overflow.

[0041] The present invention also provides a diaphragm assembly comprising the diaphragm described above. The diaphragm assembly further comprises a piston 2 and a piston connector 3. The piston 2 is inserted into the second groove 13 and connected to the balance wheel via the piston connector 3, which passes through the piston 2 and the diaphragm. Each piston 2 is provided with two positioning holes, the diameter of which is the same as that of the positioning posts 132. The two positioning posts 132 within the same second groove 13 are respectively inserted into the two positioning holes on each piston 2, enabling the piston 2 to be quickly positioned with excellent positioning effectiveness.

[0042] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model.

Claims

1. A diaphragm, characterized in that: The invention comprises a diaphragm body (1), wherein the front side of the diaphragm body (1) is provided with a first groove, the back side of the diaphragm body (1) is provided with a plurality of raised structures (11), the bottom wall of the first groove (12) is provided with a plurality of second grooves (13), each of the second grooves (13) is arranged corresponding to one of the raised structures (11), the bottom wall of the second groove (13) is provided with a mounting hole (17), each of the mounting holes (17) passes through a corresponding one of the raised structures (11), and the inner wall of each of the second grooves (13) is provided with at least one positioning column (132), and the positioning column (132) is used for positioning the piston.

2. The diaphragm according to claim 1, characterized in that The side wall of the second groove (13) is an arc-shaped wall (131) that gradually approaches the center from the periphery, the end of the arc-shaped wall (131) close to the center of the diaphragm body (1) is a triangular structure, and the end of the arc-shaped wall (131) away from the center of the diaphragm body (1) is a spherical structure, and the positioning column (132) is arranged on the arc-shaped wall (131).

3. The diaphragm according to claim 2, characterized in that Two spaced-apart positioning posts (132) are provided in each of the second grooves (13), and the distance between the central axes of the two positioning posts (132) is 3 mm to 5 mm.

4. The diaphragm according to claim 1, characterized in that The number of the second grooves (13) is six, and the number of the protruding structures (11) is also six. The six second grooves (13) and the six protruding structures (11) are evenly distributed along the circumference and are respectively located on the upper and lower sides of the diaphragm body (1).

5. The diaphragm according to claim 4, characterized in that The second groove (13) is a water drop-shaped structure, and the tip of the second groove (13) faces the center of the diaphragm body (1).

6. The diaphragm according to claim 1, characterized in that A third groove (14) is provided on the bottom wall of the second groove (13), the central axis of the third groove (14) coincides with the central axis of the mounting hole (17), and the third groove (14) is used for mounting a piston sealing ring.

7. The diaphragm according to claim 6, characterized in that A plurality of radially distributed ribs (15) are provided on the bottom wall of the first groove (12), and the plurality of ribs (15) divide the diaphragm body (1) into a plurality of piston actuation areas, each of which has a second groove (13) for mounting a piston.

8. The diaphragm according to claim 7, characterized in that An annular convex rib (16) is provided in the middle of the bottom wall of the first groove (12), and a plurality of radially distributed ribs (15) are connected to the outer side wall of the annular convex rib (16).

9. The diaphragm according to claim 1, characterized in that A fourth groove (111) is provided on the bottom wall of the protruding structure (11), and the fourth groove (111) surrounds the mounting hole (17).

10. A diaphragm assembly, characterized in that: The invention comprises the membrane according to any one of claims 1 to 9.

Images