A diaphragm pump head structure

Abstract

This utility model discloses a diaphragm pump head structure, including a pump head body, a fluid chamber support, and a piston frame driven by a drive device. The piston frame is movably disposed within the fluid chamber support and has multiple piston heads. The fluid chamber support has piston holes corresponding to the piston heads, and the piston heads are movably disposed within the piston holes. The piston frame has a rotational tendency under the action of the drive device, with the direction of rotation set as the reference direction. A movable gap is provided between the inner wall of the piston hole and the piston head, and the movable gap gradually increases along the reference direction. The movable gap corrects the offset of the piston head during actual operation, thereby ensuring that the distance between the piston head and the inner wall of the piston hole is relatively uniform during actual operation. This, in turn, ensures that the diaphragm sinks uniformly during suction and discharge, reduces wear, and extends service life.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pumps, and specifically to a diaphragm pump head structure. Background Technology

[0002] As people's demands for drinking water quality increase, water purifiers are widely accepted and used. Water purifiers primarily use diaphragm pumps to pump tap water into a filter membrane for purification. During the operation of the diaphragm pump, its core component, the diaphragm, is constantly moving and compressed. However, due to the lack of revolutionary improvements in its materials and the fact that most existing diaphragms have a symmetrical design, the diaphragm is prone to damage after prolonged use. The main reason is that when the piston holder carries the diaphragm and piston holder in suction and discharge motion, because the diaphragm is an elastic body, its working state after assembly and fixation is not as perfect as originally designed. In actual operation, it will slightly deviate in the direction of motor rotation. This causes unevenness in the gap between the fluid chamber support hole and the piston head of the piston holder. For example, when the motor moves clockwise, the piston head will also deviate clockwise. In reality, the gap decreases in the direction of movement and increases in the opposite direction. With the gap increasing, the diaphragm sinks too deeply due to internal pressure during suction and discharge motion, leading to diaphragm rupture and water leakage from the pump chamber. To address the aforementioned issues, a diaphragm pump head structure is proposed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a diaphragm pump head structure that is simple in structure, reliable in use, and capable of correcting the offset in actual operation.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a diaphragm pump head structure, including a pump head body, the pump head body is provided with a fluid chamber support and a piston frame driven by a driving device, the piston frame is movably disposed in the fluid chamber support, the piston frame is provided with a plurality of piston heads, the fluid chamber support is provided with piston holes corresponding one-to-one with the piston heads, the piston heads are movably disposed in the piston holes, characterized in that the piston frame has a rotational tendency under the action of the driving device, the direction of the rotational tendency is set as the reference direction, and a movable gap is provided between the inner wall of the piston hole and the piston head, the movable gap gradually increasing along the reference direction.

[0005] Preferably, the plurality of piston holes are evenly distributed around the axis of the fluid chamber support, the piston holes are triangular with rounded ends, the piston holes are symmetrically arranged about the centerline, and the top of the piston holes faces the center of the fluid chamber support; the advantage is that the uniformly distributed and symmetrically arranged piston holes can improve the efficiency of fluid chamber support processing and forming, and facilitate subsequent assembly.

[0006] Furthermore, the piston head is adapted to the piston bore in a triangular shape, and the triangle formed by the three sides of the piston head is a non-isosceles triangle. The advantage of this non-isosceles triangular piston head shape is that it ensures the moving clearance gradually increases along the reference direction, thereby ensuring that during actual operation, with slight displacement of the piston head, the distance between the piston head and the inner wall of the piston bore remains relatively uniform.

[0007] Preferably, the piston frame is provided with a plurality of piston heads evenly distributed around its axis. The piston heads are triangular, with their ends facing the center of the piston frame and with rounded transitions at the ends. The piston heads are symmetrically arranged about its centerline. The evenly and symmetrically distributed piston heads can be easily processed and shaped, improving production efficiency.

[0008] Furthermore, the piston bore is adapted to the corresponding piston head and is triangular in shape; the triangle formed by the three sides of the piston bore is a non-isosceles triangle. The advantage lies in achieving a gradual increase in the moving gap by setting a symmetrical piston head and a non-isosceles piston bore, thereby ensuring that the gap between the piston bore and the piston head remains uniform as the piston head slightly shifts during actual operation.

[0009] Preferably, the device further includes a diaphragm, wherein the diaphragm is provided with a membrane corresponding to a piston head, and the piston head is used to drive the diaphragm to move up and down.

[0010] Furthermore, the diaphragm is provided with a fixing post, and the piston head is provided with a positioning hole, with the fixing post embedded in the corresponding fixing hole; the advantage is that the cooperation between the fixing post and the positioning hole can ensure the stability between the diaphragm and the piston head, and ensure that the piston head can reliably drive the diaphragm when it moves.

[0011] Preferably, the fluid chamber support is detachably equipped with a motor front cover, and the piston bracket is located between the fluid chamber support and the motor front cover; the advantage is that the detachable motor front cover facilitates the assembly of the piston bracket.

[0012] Furthermore, the driving device includes an eccentric drive wheel, which is rotatably disposed inside the front cover of the motor. The eccentric drive wheel is used to drive the piston frame to move. The advantage is that the eccentric wheel can drive the piston frame to fluctuate, thereby driving the piston heads to move up and down one by one.

[0013] Preferably, the plurality of piston holes are evenly distributed around the axis of the fluid chamber support, the piston holes are symmetrical structures, the axis of symmetry of the piston holes is set as an auxiliary axis of symmetry, the piston head is adapted to the piston holes, and the piston head has no axis of symmetry parallel to the auxiliary axis of symmetry; the advantage is that by setting symmetrical piston holes and asymmetrical piston heads, the active clearance is increased along the reference direction, thereby compensating for the offset of the piston head in actual use and ensuring that the clearance between the piston head and the piston hole wall is relatively uniform during the operation of the piston head.

[0014] Compared with existing technologies, the advantages of this invention are that it features a gradually increasing movable clearance along the reference direction. During actual operation, the piston head can utilize this clearance to correct its offset, ensuring a relatively uniform distance between the piston head and the inner wall of the piston bore. This avoids the uneven clearance issues that occur in existing designs. Furthermore, it ensures uniform diaphragm sinking distance during suction and discharge, reducing wear and extending service life. Simultaneously, the diaphragm pump's lifespan, flow rate, and noise levels are interconnected; therefore, this allows for improvements such as increasing the product's flow rate limit or reducing pump noise. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram showing the fit between the fluid chamber support and the piston head of this utility model; Figure 4 This is a front view of the piston holder of this utility model; Figure 5 This is a front view of the fluid chamber support of this utility model; Figure 6 This is a schematic diagram of the structure of the diaphragm sheet of this utility model; Figure 7 This is a schematic diagram of the present invention assembled onto a diaphragm pump; Figure 8 This is a schematic diagram of the piston hole structure of this utility model. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] The specific working process of a diaphragm pump, which involves a piston holder moving up and down via a drive unit, is existing technology and will not be elaborated further. The following improvements are made based on this existing technology.

[0020] As attached Figure 1-8 The diagram illustrates a diaphragm pump head structure, comprising a pump head body 1, a fluid chamber support 2, and a piston holder 3 driven by a drive device. The piston holder is movably disposed within the fluid chamber support 2 and has multiple piston heads 3.1. The fluid chamber support 2 has piston holes 2.1 corresponding to each piston head 3.1. The piston heads 3.1 are movably disposed within the piston holes 2.1. Under the action of the drive device, the piston holder has a rotational tendency, with the direction of rotation being defined as the reference direction. A movable gap 4 is provided between the inner wall of the piston hole 2.1 and the piston head 3.1, and the movable gap 4 gradually increases along the reference direction. This invention is illustrated using the example of the drive device driving the piston holder clockwise, where the reference direction is clockwise.

[0021] The above-mentioned scheme uses a gradually increasing movable clearance 4 along the reference direction to correct the offset of the piston head 3.1 during actual operation. This ensures that the distance between the piston head 3.1 and the inner wall of the piston hole 2.1 is relatively uniform during actual operation, avoiding the uneven clearance distance that occurs in existing designs. This, in turn, ensures uniform sinking distance of the diaphragm 6 during suction and discharge, reducing wear and extending service life. Furthermore, the diaphragm pump's lifespan, flow rate, and noise levels are interconnected; therefore, the product's flow rate limit can be increased, or noise reduction can be achieved, among other performance improvements.

[0022] Based on the above, the method to achieve the gradual increase of the active gap 4 is as follows: multiple piston holes 2.1 are evenly distributed around the axis of the fluid chamber support 2. The piston holes 2.1 are triangular in shape with rounded ends. The piston holes 2.1 are symmetrically arranged about their centerline, and the tops of the piston holes 2.1 face the center of the fluid chamber support 2. The evenly distributed and symmetrically arranged piston holes 2.1 can improve the efficiency of the fluid chamber support 2 processing and forming, and facilitate subsequent assembly. Further explanation: the piston head and piston holes are adapted to each other, both being triangular in shape, but the triangle formed by the three sides of the piston head is not an isosceles triangle. Specifically: a first protrusion 3.11 and a second protrusion 3.12 are respectively provided on both sides of the piston head 3.1. The distance from the top of the piston head to the first protrusion to the sidewall of the piston hole is smaller than the distance from the top of the piston head to the second protrusion to the sidewall of the piston hole. That is, the top of the piston head to the first protrusion is closer to the sidewall of the piston hole. This ensures that the movable clearance 4 gradually increases along the reference direction, thereby ensuring that the distance between the piston head 3.1 and the inner wall of the piston hole 2.1 remains relatively uniform during actual operation despite slight displacement of the piston head 3.1. Therefore, in actual operation, by compensating for the gap difference in the movable clearance 4 caused by the displacement of the piston head 3.1, the uniformity of the movable clearance 4 is ensured. At this time, the diaphragm 6 experiences uniform adsorption and sinking on its periphery during suction and discharge, effectively avoiding a larger sinking amplitude on one side, reducing wear, and improving service life.

[0023] This invention also includes a diaphragm 6, which has diaphragms corresponding one-to-one with the piston head 3.1. The piston head 3.1 drives the diaphragms to move up and down. The diaphragm 6 is provided with a fixing post 6.1, and the piston head 3.1 is provided with a positioning hole 3.13. The fixing post 6.1 is embedded in the corresponding fixing hole. The cooperation between the fixing post 6.1 and the positioning hole 3.13 ensures the stability between the diaphragm 6 and the piston head 3.1, ensuring that the piston head 3.1 can reliably drive the diaphragm 6 when it moves.

[0024] The fluid chamber support 2 of this utility model is detachably equipped with a motor front cover 7, which facilitates the assembly of the piston frame. Further, the driving device includes an eccentric drive wheel, which is rotatably mounted inside the motor front cover 7. The eccentric drive wheel drives the piston frame to move. The eccentric wheel 8 drives the piston frame to oscillate, thereby driving the piston heads 3.1 to move up and down sequentially.

[0025] It should be noted that the plurality of piston holes described in this utility model are evenly distributed around the axis of the fluid chamber support. The piston holes have a symmetrical structure, and the axis of symmetry of the piston holes is set as an auxiliary axis of symmetry. The auxiliary axis of symmetry intersects the axis of the fluid chamber support. The piston head is adapted to the piston holes, and the piston head has no axis of symmetry parallel to the auxiliary axis of symmetry. Specifically, the piston holes can be circular, fan-shaped, arc-shaped, etc., and the piston head is in the corresponding piston hole, with the movement clearance increasing along the reference direction.

[0026] Specifically, the driving device of this utility model is a drive motor. The drive motor drives the eccentric wheel 8 to rotate clockwise, and during the clockwise rotation of the eccentric wheel 8, it drives the piston frame 3 to fluctuate up and down clockwise. At the same time, the piston head 3.1 has a clockwise rotational direction, and at this time the reference direction is the clockwise direction, as shown in the attached diagram. Figure 3 As shown. When the reference direction is clockwise, the movable gap 4 increases in the clockwise direction, as... Figure 3 The portion shown by the dashed line. During actual operation, when the piston head 3.1 is driven by the drive device to rotate clockwise, the movable clearance can better compensate for this offset. That is, the piston head offsets to the center of the piston bore. At this point, the distance between the piston head and the piston bore walls is relatively uniform, thus preventing excessive distance between the piston head and one side of the piston bore during operation, which would cause the diaphragm to sink excessively on the side with the larger gap, thereby extending the diaphragm's service life. Similarly, when the drive motor drives the eccentric wheel to rotate counterclockwise, the reference direction is counterclockwise. Initially, the movable clearance increases in the counterclockwise direction.

[0027] It is worth mentioning that another method to achieve a gradual increase in the movement gap along the reference direction is as follows: the piston holder is provided with multiple piston heads 3.1 evenly distributed around its axis. Each piston head is triangular, with its ends facing the center of the piston holder and rounded at the ends. The piston heads 3.1 are symmetrically arranged about their midline. The piston hole 2.1 is adapted to the corresponding piston head 3.1 and is triangular in shape; the triangle formed by the three sides of the piston hole 2.1 is a non-isosceles triangle. Specifically, the piston hole has a first recessed area 2.11 and a second recessed area 2.12 located on both sides. The symmetrical arrangement of the piston heads and the non-isosceles triangular piston hole ensures that the piston head inside the piston hole is close to the first recessed area 2.11. This achieves a gradual increase in the movement gap, ensuring that the gap between the piston hole and the piston head remains uniform even with slight displacement of the piston head during actual operation.

[0028] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A diaphragm pump head structure, comprising a pump head body, the pump head body being provided with a fluid chamber support and a piston frame driven by a driving device, the piston frame being movably disposed within the fluid chamber support, the piston frame being provided with a plurality of piston heads, the fluid chamber support being provided with piston holes corresponding one-to-one with the piston heads, the piston heads being movably disposed within the piston holes, characterized in that, The piston frame has a rotational tendency under the action of the driving device. The direction of the rotational tendency is set as the reference direction. An movable gap is provided between the inner wall of the piston hole and the piston head. The movable gap gradually increases along the reference direction.

2. The diaphragm pump head structure according to claim 1, characterized in that, The piston holes are evenly distributed around the axis of the fluid chamber support. The piston holes are triangular with rounded ends. The piston holes are symmetrical about their centerline and the top of the piston holes faces the center of the fluid chamber support.

3. The diaphragm pump head structure according to claim 2, characterized in that, The piston head is triangular in shape and is adapted to the piston hole. The triangle formed by the three sides of the piston head is a non-isosceles triangle.

4. The diaphragm pump head structure according to claim 1, characterized in that, The piston holder is provided with a plurality of piston heads evenly distributed around its axis. The piston heads are triangular in shape, with their ends facing the center of the piston holder and with rounded transitions at the ends. The piston heads are symmetrically arranged about its centerline.

5. The diaphragm pump head structure according to claim 4, characterized in that, The piston hole is adapted to the corresponding piston head and is triangular in shape; the triangle formed by the three sides of the piston hole is a non-isosceles triangle.

6. The diaphragm pump head structure according to claim 1, characterized in that, It also includes a diaphragm, which is provided with a diaphragm that corresponds one-to-one with the piston head, and the piston head is used to drive the diaphragm to move up and down.

7. The diaphragm pump head structure according to claim 6, characterized in that, The diaphragm is provided with a fixing post, and the piston head is provided with a positioning hole, with the fixing post embedded in the corresponding fixing hole.

8. The diaphragm pump head structure according to claim 1, characterized in that, The fluid chamber support is detachably equipped with a motor front cover, and the piston bracket is located between the fluid chamber support and the motor front cover.

9. A diaphragm pump head structure according to claim 8, characterized in that, The drive device includes an eccentric drive wheel, which is rotatably disposed inside the front cover of the motor and is used to drive the piston frame to move.

10. A diaphragm pump head structure according to claim 1, characterized in that, The piston holes are evenly distributed around the axis of the fluid chamber support. The piston holes have a symmetrical structure. The axis of symmetry of the piston holes is set as an auxiliary axis of symmetry. The piston head is adapted to the piston holes, and the piston head has no axis of symmetry parallel to the auxiliary axis of symmetry.

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