阅读说明：本技术 一种隔膜泵头及包括该隔膜泵头的隔膜增压泵 (Diaphragm pump head and diaphragm booster pump comprising same ) 是由 蔡应麟 徐兆火 于 2020-11-18 设计创作，主要内容包括：本发明公开了一种隔膜泵头及包括该隔膜泵头的隔膜增压泵,涉及水泵领域。该方案对隔膜片、活塞推块的结构进行改进,减少活塞推块在隔膜片上形成压痕,扩大了隔膜片可伸展的范围,为增大圆柱摆轮的摆动倾角创造条件,并极大地增加了隔膜片的耐拉扯性能,具有使用寿命长、可靠、稳定的优点。还提出一种基于改进后的隔膜泵头的隔膜增压泵,使用寿命长,可靠性、稳定性高。(The invention discloses a diaphragm pump head and a diaphragm booster pump comprising the same, and relates to the field of water pumps. The proposal improves the structure of the diaphragm and the piston push block, reduces the indentation formed on the diaphragm by the piston push block, enlarges the extendable range of the diaphragm, creates conditions for increasing the swing inclination angle of the cylindrical balance wheel, greatly increases the anti-pulling performance of the diaphragm, and has the advantages of long service life, reliability and stability. The diaphragm booster pump based on the improved diaphragm pump head is long in service life, and high in reliability and stability.)

1. A diaphragm pump head comprises a pump head seat (60), a balance wheel seat (110), a diaphragm (70), a piston push block (80), a piston valve seat (111) and a pump head cover (112), wherein the balance wheel seat (110) is provided with a plurality of cylindrical balance wheels (502), the cylindrical balance wheels (502) are provided with positioning grooves (2), the diaphragm (70) comprises a diaphragm body (702), one side of the diaphragm body (702) facing the cylindrical balance wheels (502) is provided with a positioning convex edge (3) matched with the positioning grooves (2), the other side of the diaphragm body is provided with a positioning convex column (704) with a through hole, the piston push block (80) passes through the positioning convex column (704) through a screw (1) to be fixed on the cylindrical balance wheels (502) of the balance wheel seat (110), the diaphragm pump head is characterized in that the periphery of the diaphragm body (702) positioned on the positioning convex column (704) is also provided with a pressing groove (4), one side of the piston push block (80) facing the diaphragm (70) is provided with a pressing protrusion (5) inserted in the pressing groove (4), and the height of the pressing protrusion (5) is larger than the depth of the pressing groove (4).

2. A diaphragm pump head according to claim 1, wherein a threaded hole (5021) for the screw (1) to connect with is provided in the positioning groove (2) on the cylindrical balance wheel (502), a positioning protrusion (201) is provided on the periphery of the threaded hole (5021) on the cylindrical balance wheel (502), the height of the positioning protrusion (201) m is smaller than the depth n of the positioning groove (2), and a positioning recess (301) matched with the positioning protrusion (201) is provided on the positioning ledge (3).

3. A diaphragm pump head according to claim 2, wherein the wall thickness a0 of the diaphragm body (702), the distance a1 from the bottom of the pressing groove (4) to the bottom of the positioning recess (301), the wall thickness a2 of the transition between the diaphragm body (702) and the positioning projection (201), and the wall thickness a4 of the positioning stud (704) are equal.

4. A diaphragm pump head according to claim 1 or 2, wherein the diaphragm body (702) is further provided with an auxiliary projection (705) at the periphery of the pressing groove (4), and the piston push block (80) is provided with a receiving groove (801) for receiving the auxiliary projection (705).

5. A diaphragm pump head comprises a pump head seat (60), a balance wheel seat (110), a diaphragm (70), a piston push block (80), a piston valve seat (111) and a pump head cover (112), wherein a plurality of cylindrical balance wheels (502) are arranged on the balance wheel seat (110), the diaphragm (70) comprises a diaphragm body (702), and the diaphragm pump head is characterized in that a positioning groove (2) is arranged on the piston push block (80), one side of the diaphragm body (702) facing the piston push block (80) is provided with a positioning convex edge (3) matched with the positioning groove (2), the other side of the diaphragm body is provided with a pressing groove (4), the center of the pressing groove (4) is provided with a positioning convex column (704) with a through hole, the cylindrical balance wheels (502) are provided with a positioning concave hole (6) for the positioning convex column (704) to be inserted and connected, the outer edge of the positioning concave hole (6) is provided with a pressing convex column (5) inserted and connected with the pressing groove (4), the height of the pressing protrusion (5) is greater than the depth of the pressing groove (4).

6. A diaphragm pump head according to claim 5, wherein a positioning projection (201) is provided in the positioning groove (2), the positioning projection (201) having a height m less than the depth n of the positioning groove (2), and a positioning recess (301) is provided on the positioning projection (201) for cooperating with the positioning projection (201).

7. Diaphragm pump head according to claim 6, wherein the wall thickness a0 of the diaphragm body (702), the distance a1 from the bottom of the pressing groove (4) to the bottom of the positioning recess (301), the wall thickness a2 of the transition between the diaphragm body (702) and the positioning projection (201), and the wall thickness a4 of the positioning stud (704) are equal.

8. A membrane booster pump comprising an electric motor (7), characterized by further comprising a membrane pump head according to any one of claims 1-4 or 5-7, said electric motor (7) being connected to said membrane pump head.

Technical Field

The invention relates to the field of water pumps, in particular to a diaphragm pump head and a diaphragm booster pump comprising the same.

Background

At present, diaphragm booster pumps are commonly used in domestic and foreign water filtration filters, for example, chinese patent with application number 201410214003.5 discloses a damping structure and a balance wheel structure of a five-booster-cavity diaphragm pump, which includes a motor, a motor front cover, an inclined eccentric cam, a balance wheel seat, a pump head seat, a diaphragm, a piston push block, a piston valve body and a pump head cover, wherein the balance wheel is arranged on the balance wheel seat, a motion through hole is arranged on the pump head seat, the balance wheel seat is arranged in the motion through hole in a penetrating way, and the piston push block and the diaphragm are fixed on the balance wheel by fixing screws penetrating through the piston push block; the side of the outer periphery of the bottom of the piston valve body is provided with a ring of raised strips in a downward protruding manner, and the ring raised strips are plugged into gaps between the outer raised strips and the inner raised strips in the diaphragm, so that the diaphragm is fixed after the piston valve body is fastened and compacted by the ring raised strips, and a closed pressurizing chamber is formed between the water inlet seat of the piston valve body and the top surface of the diaphragm.

The diaphragm booster pump works by driving the inclined eccentric cam to rotate through the motor, so that the inclined eccentric cam drives the balance wheel seat and the balance wheel on the balance wheel to move up and down in a swinging mode, the diaphragm is elastically deformed along with the swinging of the balance wheel, the volume of a boosting cavity between the diaphragm and the water inlet seat is changed, and the water suction-boosting water drainage process is carried out.

In the process of the movement of the balance, the diaphragm frequently moves back and forth along with the balance to generate deformation, when the booster pump works normally, the reciprocating pulling of the balance is buffered by depending on the deformability of the diaphragm material, referring to fig. 118, 119 and 120 of the patent, the piston push block 80 is fastened on the cylindrical balance 502 by the fixing screw 1, the cylindrical balance 502 drives the diaphragm 70 to deform when swinging up and down in the through hole of the pump head seat 60, the shear stress received by the diaphragm 70 is gradually reduced along the connecting position of the diaphragm 70, the piston push block 80 and the cylindrical balance 502 to the direction of the annular convex strip 91, the lower surface of the piston push block 80 is in contact with the upper surface of the diaphragm 70, the lower surface of the diaphragm 70 and the cylindrical balance 502 are in contact, the contact surfaces of the three are flat, the diaphragm 70 is made of an elastic material, when the piston push block 80 is fastened, the diaphragm 70 is pressed against the surface of the cylindrical balance 502 by the locking force provided by the fixing screw 1 for the piston push block 80, and the diaphragm 70 is pressed against the surface of On one hand, due to the fact that the contact surface between the piston push block 80 and the diaphragm 70 is large, the deformable range of the diaphragm 70 is small, namely L0 shown in FIG. 1, and due to the fact that the distance is short, namely the range of the diaphragm which can stretch to generate elastic deformation is small, the size of the up-and-down swinging inclination angle of the cylindrical balance 502 is limited, the number of the cylindrical balance is further limited, and the flow rate of the booster pump is prevented from being increased; on the other hand, under the extrusion of the piston push block 80, the thickness of the diaphragm sheet 70 becomes thinner, and an indentation 701 (refer to fig. 2) conforming to the shape of the lower surface of the piston push block 80 is formed on the diaphragm sheet 70, and the generation of the indentation will greatly increase the risk of the diaphragm sheet 70 cracking and leaking, which will shorten the service life of the diaphragm sheet 70, thereby affecting the overall service life of the diaphragm pump.

Therefore, it is necessary to provide a diaphragm booster pump with good sealing performance and long service life.

Disclosure of Invention

In order to solve the above technical problems, a first object of the present invention is to provide a diaphragm pump head, which improves the structure of a diaphragm and a piston push block, reduces the indentation formed on the diaphragm by the piston push block, enlarges the extendable range of the diaphragm, creates conditions for increasing the swing inclination angle of a cylindrical balance wheel, greatly increases the pulling resistance of the diaphragm, and has the advantages of long service life, reliability and stability.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the diaphragm pump head comprises a pump head seat, a swinging wheel seat, a diaphragm, a piston push block, a piston valve seat and a pump head cover, wherein a plurality of cylindrical balance wheels are arranged on the swinging wheel seat, positioning grooves are formed in the cylindrical balance wheels, the diaphragm comprises a diaphragm body, one side, facing the cylindrical balance wheels, of the diaphragm body is provided with a positioning convex edge matched with the positioning grooves, the other side of the diaphragm body is provided with a positioning convex column with a through hole, the piston push block penetrates through the positioning convex column through a screw and is fixed on the cylindrical balance wheels of the swinging wheel seat, the diaphragm body is located on the periphery of the positioning convex column and is further provided with a pressing groove, the piston push block is arranged on one side, facing the diaphragm, of the diaphragm is provided with a pressing bulge inserted in the pressing groove, and the height of the pressing bulge is larger than the depth of the pressing groove.

Through the arrangement, when the device is installed, the diaphragm is positioned on the cylindrical balance wheel through the matching of the positioning convex edge and the positioning groove; then the piston push block is positioned with the abutting groove through the abutting bulge one by one, then the piston push block and the diaphragm are fixed on the cylindrical balance wheel through the screw passing through the piston push block and connected with the cylindrical balance wheel through the through hole of the positioning convex column, when the screw fastens the piston push block, the diaphragm and the cylindrical balance wheel, the abutting bulge is inserted into the abutting groove, the height of the abutting bulge is larger than that of the abutting groove, the part of the diaphragm positioned in the positioning groove is extruded, the deformation range of the diaphragm generated by the fastening force of the screw is limited in the positioning groove, after the installation is finished, the surface of the piston push block parallel to the diaphragm keeps a distance with the diaphragm, thereby avoiding the indentation generated by the direct contact between the surface of the piston push block parallel to the diaphragm and the compression of the diaphragm, further leading to the possibility of the reduction of the pulling resistance of the diaphragm, on the other hand, because the deformation position of the diaphragm is positioned in the positioning groove, therefore, the extending range of the part of the diaphragm outside the positioning groove is enlarged, the shearing stress of the diaphragm is favorably reduced, the pulling resistance of the diaphragm is enhanced, the service life of the diaphragm pump head is prolonged, the reliability and the stability are improved, in addition, the inclination angle of the diaphragm allowing the cylindrical balance wheel to move is increased, conditions are created for increasing the number of subsequently designed gears and the moving inclination angle, namely conditions are created for subsequently increasing the flow of the pump.

Preferably, a threaded hole for connecting the screw is formed in the positioning groove on the cylindrical balance wheel, a positioning protrusion is arranged on the periphery of the threaded hole on the cylindrical balance wheel, the height of the positioning protrusion m is smaller than the depth n of the positioning groove, and a positioning concave portion matched with the positioning protrusion is arranged on the positioning convex edge.

Through setting up like this, because the position that piston ejector pad extrusion diaphragm warp is located positioning groove, set up the location concave part on protruding edge in the location, and set up the location arch in positioning groove, enable the bottom of location concave part and support and press the interval between the recess to reduce for the diaphragm is changeed in the deformation, changes in filling in positioning groove, increases water-proof effects.

Preferably, the wall thickness a0 of the diaphragm body, the distance a1 from the bottom of the pressing groove to the bottom of the positioning recess, the wall thickness a2 of the transition portion between the diaphragm body and the positioning protrusion, and the wall thickness a4 of the positioning boss are equal.

Through setting up like this for diaphragm thickness is even, reduces the manufacturing process degree of difficulty, is favorable to reducing the production of manufacturing in-process substandard product.

Preferably, the periphery of the abutting groove on the diaphragm body is further provided with an auxiliary protrusion, and the piston push block is provided with an accommodating groove for accommodating the auxiliary protrusion.

Through the arrangement, the sealing performance of the piston push block, the diaphragm and the cylindrical balance wheel after being fixedly connected is further improved, the possibility of water leakage is reduced, and the reliability of the diaphragm pump head is improved.

As an alternative scheme, the present invention provides another diaphragm pump head, which includes a pump head seat, a wobble wheel seat, a diaphragm, a piston push block, a piston valve seat, and a pump head cover, wherein the wobble wheel seat is provided with a plurality of cylindrical wobbles, the diaphragm includes a diaphragm body, the piston push block is provided with a positioning groove, one side of the diaphragm body facing the piston push block is provided with a positioning convex edge matched with the positioning groove, the other side of the diaphragm body is provided with a pressing groove, the center of the pressing groove is provided with a positioning convex column having a through hole, the cylindrical wobble wheel is provided with a positioning concave hole for the insertion of the positioning convex column, the outer edge of the positioning concave hole is provided with a pressing protrusion inserted in the pressing groove, and the height of the pressing protrusion is greater than the depth of the pressing groove.

Through the arrangement, the positioning groove is arranged on the piston push block, the positioning convex edge is arranged on the diaphragm body, the diaphragm body is also provided with the positioning convex column and the abutting groove, the swinging wheel seat is provided with the positioning concave hole for the insertion of the positioning convex column, and the abutting protrusion is arranged on the periphery of the positioning concave hole; then the screw passes through the piston push block and the through hole of the positioning convex column to be fixedly connected with the cylindrical balance wheel through screw threads, in the process of screw thread fastening, the abutting bulge on the balance wheel seat is inserted into the abutting groove to extrude the diaphragm, because the height of the abutting bulge is greater than the depth of the abutting groove, after the fastening is finished, the parallel surface of the piston push block and the diaphragm keeps a distance with the diaphragm, and the position of the diaphragm which is extruded to deform is also in the positioning groove, thereby avoiding the direct contact of the parallel surface of the piston push block and the diaphragm to form an indentation on the diaphragm, further avoiding the possibility of reducing the pulling resistance of the diaphragm, improving the pulling resistance of the diaphragm, prolonging the service life of the diaphragm pump head, improving the reliability and the stability of the use of the diaphragm pump head, on the other hand, consistent with the first scheme, because the range of the diaphragm which is extruded to deform is only limited in the positioning groove, therefore, the range of the external extensional deformation of the diaphragm is enlarged, the shearing stress of the diaphragm is favorably reduced, the pulling resistance of the diaphragm is enhanced, the movable inclination angle of the cylindrical balance wheel allowed by the diaphragm is increased, and conditions are created for the increase of the number of the subsequently designed gears and the movable inclination angle, namely the flow of the subsequently enlarged pump.

Preferably, a positioning protrusion is arranged in the positioning groove, the height m of the positioning protrusion is smaller than the depth n of the positioning groove, and a positioning concave part matched with the positioning protrusion is arranged on the positioning protrusion.

Through setting up like this, the bottom that enables the location concave part and support and press the interval between the recess to reduce for the diaphragm is changeed in the deformation, changes in among the filling positioning groove, increases water-proof effects.

Preferably, the wall thickness a0 of the diaphragm body, the distance a1 from the bottom of the pressing groove to the bottom of the positioning recess, the wall thickness a2 of the transition portion between the diaphragm body and the positioning protrusion, and the wall thickness a4 of the positioning boss are equal.

Through setting up like this for diaphragm thickness is even, reduces the manufacturing process degree of difficulty, is favorable to reducing the production of manufacturing in-process substandard product.

Based on the same inventive concept, a second object of the present invention is to provide a diaphragm booster pump, which comprises a motor and any one of the above diaphragm pump heads, wherein the motor is connected with the diaphragm pump head.

Through setting up like this, owing to adopt above-mentioned diaphragm pump head, also possess above technological effect certainly, can be that the life extension, the reliability and the stability of diaphragm booster pump increase, can also be favorable to increasing the flow of diaphragm booster pump, have better use prospect.

Compared with the prior art, the invention has the beneficial technical effects that:

1. the diaphragm pump head has the advantages that through structural improvements of the diaphragm, the piston push block and the cylindrical balance wheel, indentation is avoided from being generated on the diaphragm, the pressed area of the diaphragm is reduced, the extensible range of the diaphragm is enlarged, design reference is provided for a large-flow diaphragm booster pump, the service life of the diaphragm pump head is effectively prolonged, and the use reliability and stability of the diaphragm pump head are enhanced.

2. The diaphragm booster pump based on the improved diaphragm pump head is long in service life, and high in reliability and stability.

Drawings

FIG. 1 is a schematic view of a piston push block, a diaphragm and a cylindrical balance wheel connected in the prior art;

FIG. 2 is a schematic view of a diaphragm after a period of use in the prior art;

fig. 3 is an exploded schematic view of the overall structure of a diaphragm pump head in embodiment 1 of the present invention;

FIG. 4 is a cross-sectional view of a diaphragm pump head in embodiment 1 of the present invention;

FIG. 5 is an enlarged view of the portion O of FIG. 7;

FIG. 6 is a schematic view showing the structure of a diaphragm in example 1 of the present invention;

FIG. 7 is a cross-sectional view of a diaphragm pump head in embodiment 2 of the present invention;

FIG. 8 is an enlarged view of portion P of FIG. 7;

FIG. 9 is a schematic view showing the structure of a diaphragm in example 2 of the present invention;

FIG. 10 is a cross-sectional view of a diaphragm pump head in embodiment 3 of the present invention;

FIG. 11 is an enlarged view of portion Q of FIG. 10;

FIG. 12 is a cross-sectional view of a diaphragm pump head in embodiment 4 of this invention;

FIG. 13 is an enlarged view of portion R of FIG. 12;

FIG. 14 is a schematic view showing the structure of a diaphragm in example 4 of the present invention;

fig. 15 is an exploded view of the overall structure of the membrane booster pump in embodiment 5 of the present invention.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

1. a screw; 502. a cylindrical balance wheel; 5021. a threaded hole; 60. a pump head base; 70. a diaphragm sheet; 701. indentation; 702. a diaphragm body; 703. a rib; 704. positioning the convex column; 705. an auxiliary projection; 80. a piston push block; 801. accommodating grooves; 901. a ring rib; 11. a diaphragm pump head; 110. a swinging wheel seat; 111. a piston valve seat; 112. a pump head cover; 2. a positioning groove; 201. positioning the projection; 3. positioning the convex edge; 301. a positioning recess; 4. pressing the groove; 5. pressing the protrusion; 6. positioning concave holes; 7. a motor; 700. a front cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.

Example 1

Referring to fig. 3 to 6, the present embodiment discloses a diaphragm pump head 11, which includes a pump head seat 60, a wobble plate seat 110, a diaphragm sheet 70, a piston push block 80, a piston valve seat 111, and a pump head cover 112, and further includes structures, such as an eccentric cam and a bearing, which are not shown in the drawings, and the parts which are not shown in the drawings are the prior art.

Referring to fig. 3 to 6, in this embodiment, a plurality of cylindrical wobblers 502 are disposed on the wobble wheel base 110, a positioning groove 2 is disposed on each cylindrical wobbler 502, the diaphragm 70 includes a diaphragm body 702, a positioning ledge 3 that is matched with the positioning groove 2 is disposed on one side of the diaphragm body 702 facing the cylindrical wobbler 502, a positioning convex pillar 704 having a through hole (not labeled in the figure) is disposed on the other side of the diaphragm body 702, the piston push block 80 is fixed on the cylindrical wobbler 502 of the wobble wheel base 110 by passing through the positioning convex pillar 704 through a screw 1, a pressing groove 4 is further disposed on the diaphragm body 702 at the periphery of the positioning convex pillar 704, a pressing protrusion 5 inserted in the pressing groove 4 is disposed on one side of the piston push block 80 facing the diaphragm 70, and the height of the pressing protrusion 5 is greater than the depth of the pressing groove 4, i.e., H > H.

Referring to fig. 2, 3, 4 and 6, the diaphragm body 702 in the present embodiment has the same structure as the diaphragm 70 in the prior art, and is divided into a plurality of water injection areas (not labeled) by a plurality of ribs 703 according to the number of the piston push blocks 80.

Referring to fig. 4 and 5, the fastening force generated by the screw 1 is transmitted to the diaphragm sheet 70 through the piston push block 80, so that the deformation range of the diaphragm sheet 70 is limited to the positioning groove 2, and thus the surface of the piston push block 80, which is normally parallel to the diaphragm sheet 70, keeps a distance from the diaphragm sheet 70, thereby avoiding the indentation 701 generated by the direct contact between the surface of the piston push block 80, which is parallel to the diaphragm sheet 70, and thus the possibility of the reduction of the pulling resistance of the diaphragm sheet 70, is avoided, on the other hand, because the deformation pressed position of the diaphragm sheet 70 is located in the positioning groove 2, the extensible range of the part of the diaphragm sheet 70, which is located outside the positioning groove 2, is enlarged, namely the distance L1 from the positioning groove 2 to the ring rib 901 in the drawing is greater than L0 in the conventional structure, which is beneficial to reduce the shearing stress of the diaphragm sheet 70, enhance the pulling resistance of the diaphragm sheet 70, and prolong, reliability and stability are improved and, in addition, the diaphragm 70 is made to allow the pitch of the cylindrical balance 502 to be increased, allowing for an increase in the number of gears and the pitch of the following design, i.e. for a subsequent increase in the flow rate of the pump.

Preferably, after the piston push 80 and the diaphragm 70 are fixed to the circular wobbler 502, the distance between the surface (surface P shown in fig. 5) of the piston push 80 parallel to the diaphragm 70 and the upper surface of the diaphragm is 0.01 to 0.5 mm.

Example 2

Referring to fig. 7 to 9, based on embodiment 1, the present embodiment discloses another diaphragm pump head 11, and the present embodiment is different from embodiment 1 in that:

a threaded hole 5021 for connecting a screw 1 is arranged in the positioning groove 2 on the cylindrical balance 502, a positioning protrusion 201 is arranged on the periphery of the threaded hole 5021 on the cylindrical balance 502, the height of the positioning protrusion 201m is smaller than the depth n of the positioning groove 2, and a positioning concave part 301 matched with the positioning protrusion 201 is arranged on the positioning convex edge 3.

Preferably, m ═ (1/4) n.

The diaphragm 70 is a thermoplastic vulcanized rubber diaphragm, and the positioning convex edge 3, the positioning convex column 704, the abutting groove 4, the positioning concave portion 301 and the diaphragm body 702 on the diaphragm 70 are integrally formed.

Referring to fig. 9, the wall thickness a0 of the diaphragm body 702, the distance a1 from the bottom of the pressing groove 4 to the bottom of the positioning recess 301, the wall thickness a2 of the transition portion between the diaphragm body 702 and the positioning protrusion 201, and the wall thickness a4 of the positioning stud 704 are equal.

Example 3

Referring to fig. 10 and 11, the present embodiment discloses another diaphragm pump head 11, and is based on embodiment 1 or embodiment 2 and differs from embodiment 1 or embodiment 2 in that:

an auxiliary protrusion 705 is further disposed on the periphery of the pressing groove 4 on the diaphragm body 702, and an accommodating groove 801 for accommodating the auxiliary protrusion 705 is disposed on the piston push block 80.

The deformation of the diaphragm 70 not only occurs in the positioning groove 2, but also occurs in the accommodating groove 801, the accommodating groove 801 is arranged right opposite to the positioning groove 2, so that the deformation range of the diaphragm 70 which is extruded is also positioned in the positioning groove 2, and the range of the extensible elastic deformation of the diaphragm 70 is shown as L2 in fig. 10, L2 can be larger than L0 of the existing structure, which enhances the pulling resistance of the diaphragm 70, prolongs the service life of the diaphragm pump head 11, and improves the reliability and stability.

Example 4

Referring to fig. 12 to 14, as an alternative, the present embodiment discloses another diaphragm pump head 11, which includes a pump head seat 60, a wobble wheel seat 110, a diaphragm 70, a piston push block 80, a piston valve seat 111, and a pump head cover 112, wherein a plurality of cylindrical wobblers 502 are disposed on the wobble wheel seat 110, the diaphragm 70 includes a diaphragm body 702, a positioning groove 2 is disposed on the piston push block 80, a positioning convex edge 3 matched with the positioning groove 2 is disposed on one side of the diaphragm body 702 facing the piston push block 80, a pressing groove 4 is disposed on the other side of the diaphragm body, a positioning convex pillar 704 having a through hole is disposed in the center of the pressing groove 4, a positioning concave hole 6 for the positioning convex pillar 704 to be inserted into is disposed on the cylindrical wobbler 502, a pressing protrusion 5 inserted into the pressing groove 4 is disposed on the outer edge of the positioning concave hole 6, and the height J of the pressing protrusion 5 is greater than the depth J of.

More preferably, the height I of the positioning ledge 3 is greater than the depth I of the positioning groove 2.

Referring to fig. 12 and 13, the extendable range of the portion of the diaphragm 70 located outside the positioning groove 2 is enlarged, that is, the distance L3 from the positioning groove 2 to the ring rib 901 in the drawing is also greater than L0 in the conventional structure, so as to achieve the same technical effects as those in embodiment 1, that is, the shear stress of the diaphragm 70 is reduced, the pulling resistance of the diaphragm 70 is enhanced, the service life of the diaphragm pump head 11 is prolonged, the reliability and the stability are improved, in addition, the inclination angle at which the diaphragm 70 allows the cylindrical balance 502 to move is increased, and conditions are created for increasing the number of gears and the moving inclination angle in the subsequent design, that is, conditions are created for increasing the flow rate of the pump in the subsequent design.

Preferably, after the piston push 80 and the diaphragm 70 are fixed to the circular wobbler 502, the distance between the surface of the piston push 80 parallel to the diaphragm 70 (the plane P shown in fig. 13) and the upper surface of the diaphragm is 0.01 to 0.5 mm.

A positioning protrusion 201 is arranged in the positioning groove 2, the height m of the positioning protrusion 201 is smaller than the depth n of the positioning groove 2, and a positioning concave part 301 matched with the positioning protrusion 201 is arranged on the positioning protrusion 201.

Preferably, m ═ (1/4) n.

Referring to fig. 14, the wall thickness a0 of the diaphragm body 702, the distance a1 from the bottom of the pressing groove 4 to the bottom of the positioning recess 301, the wall thickness a2 of the transition portion between the diaphragm body 702 and the positioning protrusion 201, and the wall thickness a4 of the positioning stud 704 are equal.

Example 5

Referring to fig. 15, the present embodiment discloses a diaphragm booster pump, including a motor 7, and further including any one of the diaphragm pump heads 11 of embodiments 1 to 3, a main shaft of the motor 7 is connected to a new eccentric cam of the diaphragm pump head 11, a front cover 700 of the motor 7 is fixed to a pump head base 60 of the diaphragm pump head 11, the motor 7 provides a rotation power for the diaphragm pump head 11, so as to drive the eccentric cam to swing, and further drive a swinging wheel base 110 to move in the pump head base 60, and further drive a diaphragm sheet 70 to deform so that a content cavity of the diaphragm pump head 11 changes, a water suction process and a pressurization and drainage process, which are the same as those of the prior art, are not repeated here, and the diaphragm pump head 11 of the above embodiments is adopted, so that the diaphragm booster pump has a long service life, high reliability and stability, can be provided with a larger flow rate.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.