CN214616953U

CN214616953U - Mounting structure of diaphragm pump diaphragm

Info

Publication number: CN214616953U
Application number: CN202120687497.4U
Authority: CN
Inventors: 张效振; 张洪亮; 金玲珑
Original assignee: Hangzhou Lefoo Industrial Co ltd
Current assignee: Hangzhou Lefoo Industrial Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-05
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses a mounting structure of diaphragm pump diaphragm overcomes diaphragm and the mechanism of piston in the diaphragm pump among the prior art, uses the back for a long time, and the problem that sealing performance descends appears easily, has guaranteed that diaphragm body top surface forms a sclausura, seamless body structure, guarantees sealing performance, prolongs the life of diaphragm body simultaneously to piston mold insert and diaphragm body can adopt the material that corresponds to satisfy the performance requirement respectively. The diaphragm structure comprises a diaphragm body, wherein a plurality of piston inserts are arranged on the bottom surface of the diaphragm body, the tops of the piston inserts are coated by the diaphragm body and connected, and the lower parts of the piston inserts are connected with a piston frame. The diaphragm body covers the top of the piston insert, so that the connection mode that the piston insert is embedded into the diaphragm body is realized, and the top surface of the diaphragm body is ensured to form a nonporous and seamless integrated structure.

Description

Mounting structure of diaphragm pump diaphragm

Technical Field

The utility model relates to a diaphragm pump accessory technical field especially relates to a mounting structure of diaphragm pump.

Background

The diaphragm booster pump is mainly used for a household water purifier and plays a role in boosting and conveying. The core mechanism in the pump head of the existing diaphragm pump is a water pumping mechanism consisting of a diaphragm, a piston and a balance wheel. The diaphragm body is provided with a plurality of bosses which form a sealing area with the cavity below the diaphragm chamber. And a piston is arranged in each sealing area, an elastic diaphragm is arranged between the pistons, the pistons are provided with screw holes, the pistons are connected with the diaphragms and a piston frame through screws, the piston frame is connected with an eccentric wheel, the eccentric wheel is connected with a motor output shaft of the motor component, and the pistons are driven to do reciprocating linear motion in a cavity below the diaphragm chamber to pump water under the combined action of the eccentric wheel and the piston frame.

In the prior art, for a mechanism consisting of a diaphragm, a piston and a piston frame, a piston sealing ring is mainly used for sealing a gap between a screw hole and a gap between the piston and the diaphragm, but the process control is particularly critical, and water seepage can be caused by the decrease of torsion, unlocking and the like. Because the high-pressure water chamber is arranged in the pump body, the piston bears high-frequency periodic thrust and pull force, and after long-time work, the problem of reduced sealing performance can be caused due to the fatigue of sealing materials and the influence of stress deformation of all parts, and water leakage is generated.

To solve this problem, the skilled person proposes a solution of an integrated structure of piston and membrane. However, this solution also has significant drawbacks: (1) the piston and the diaphragm are integrally formed and processed by adopting the same material, so that different performance requirements of the elasticity of the diaphragm and the strength of the piston are difficult to be considered; (2) the design precision requirement of the mold is increased, and the difficulty of injection molding processing is increased.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome diaphragm pump among the prior art diaphragm and the mechanism of piston, after long-time the use, the problem that sealing performance descends appears easily, provide a mounting structure of diaphragm pump diaphragm, guaranteed that diaphragm body top surface forms a sclausura, seamless body structure, guarantee sealing performance, prolong the life of diaphragm body simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a mounting structure of diaphragm pump diaphragm, including the diaphragm body, diaphragm body bottom surface is equipped with a plurality of piston mold inserts, and this piston mold insert top is connected with the realization by diaphragm body cladding, and the lower part and the piston frame of piston mold insert are connected. The diaphragm body covers the top of the piston insert, so that the connection mode that the piston insert is embedded into the diaphragm body is realized, and the top surface of the diaphragm body is ensured to form a nonporous and seamless integrated structure. The integral structure of the diaphragm body can effectively ensure the sealing performance, avoids the influence of the assembly holes on the structural strength of the diaphragm body, and prolongs the service life of the diaphragm body.

Preferably, the piston insert and the diaphragm body form an integrated structure through secondary injection molding, and the piston insert and the diaphragm body can be made of corresponding materials respectively so as to meet corresponding performance requirements.

Preferably, a boss is arranged on the top surface of the diaphragm body and in a position corresponding to the piston insert, and the top of the piston insert is embedded below the boss.

Preferably, a cavity is formed in the bottom surface of the diaphragm body, a boss is formed by protruding the wall of the cavity from the top surface of the diaphragm body, and the top of the piston insert is embedded into the cavity.

Preferably, the piston insert is respectively provided with a first limiting table and a second limiting table, and a limiting gap is formed between the first limiting table and the second limiting table; the first limiting table is embedded into the concave cavity, and the diaphragm body covers the first limiting table and the limiting gap.

Preferably, the bottom surface of the diaphragm body is provided with an annular sleeve, and the annular sleeve is embedded into a limiting gap between the first limiting table and the second limiting table.

Preferably, the piston insert is provided with a plurality of through holes, and inserts for integrally connecting the diaphragm body and the piston insert are filled in the through holes.

Preferably, the piston frame is provided with a groove matched with the piston insert, and the bottom of the piston insert is embedded into the groove.

Preferably, the bottom of the piston insert is provided with at least one limiting straight surface, and the inner wall of the groove is provided with a limiting inner wall corresponding to the limiting straight surface, so that the shape of the inner wall of the groove is matched with the shape of the bottom of the piston insert.

Preferably, the bottom surface of the piston frame is provided with a connecting screw, and the connecting screw penetrates through the piston frame from one side of the bottom surface of the piston frame and is connected with the piston insert.

Therefore, the technical scheme of the utility model the diaphragm body covers the top of piston mold insert, has realized the connected mode of piston mold insert embedding diaphragm body, has guaranteed that diaphragm body top surface forms a sclausura, seamless integrative structure. The integral structure of the diaphragm body can effectively ensure the sealing performance, avoids the influence of the assembly holes on the structural strength of the diaphragm body, and prolongs the service life of the diaphragm body. Meanwhile, the piston insert and the diaphragm body form an integrated structure through secondary injection molding, and the piston insert and the diaphragm body can respectively adopt corresponding materials to meet performance requirements.

Drawings

FIG. 1 is an assembled cross-sectional view of an embodiment of the present application.

Fig. 2 is a cross-sectional view of a diaphragm in an embodiment of the present application.

Fig. 3 is a schematic view of a diaphragm assembly according to an embodiment of the present disclosure.

Fig. 4 is another schematic view of a diaphragm assembly according to an embodiment of the present disclosure.

Fig. 5 is a schematic view of a piston insert in an embodiment of the present application.

Fig. 6 is a schematic view of a piston holder in an embodiment of the present application.

Fig. 7 is another schematic view of a piston holder according to an embodiment of the present application.

In the figure: 1. a diaphragm body; 101. a boss; 102. a concave cavity; 103. an annular sleeve; 104. an insert; 2. a piston insert; 201. a central column; 202. a first limit table; 203. a second limit table; 204. limiting the gap; 205. screw holes; 206. a through hole; 207. a limiting straight surface; 3. a piston frame; 301. a groove; 302. a limiting inner wall; 303. a bottom screw hole; 4. a connecting screw; 5. a diaphragm assembly.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

As shown in fig. 1, the diaphragm mounting structure of the diaphragm pump according to the present invention includes a diaphragm body 1, a plurality of piston inserts 2 provided on a bottom surface of the diaphragm body, the top of the piston inserts being covered by the diaphragm body 1 and connected thereto, and a piston holder 3 connected to a lower portion of the piston inserts 2. The diaphragm assembly 5 is formed by the diaphragm body 1 and the piston inserts 2, and the diaphragm assembly 5 is arranged between a diaphragm chamber and a piston frame 3 of the diaphragm booster pump.

As shown in fig. 2-5, the piston insert 2 includes a center post 201, a first stop 202, and a second stop 203. The first limit table 202 is arranged on the top of the central column 201, the central column 201 is provided with a second limit table 203 below the first limit table 202, and a limit gap 204 is arranged between the first limit table 202 and the second limit table 203.

The bottom surface of the diaphragm body 1 is formed with a cavity 102, the wall of the cavity protrudes from the top surface of the diaphragm body 1 to form a boss 101, and the first limit table 202 is embedded into the cavity 102. The bottom surface of the diaphragm body 1 is provided with an annular sleeve 103, and the annular sleeve 103 is embedded into a limiting gap 204 between a first limiting table 202 and a second limiting table 203.

According to the structure, the diaphragm body 1 covers the first limiting table 202 and the limiting gap 204, the connection mode that the piston insert 2 is embedded into the diaphragm body 1 is realized, and the top surface of the diaphragm body 1 is of a non-porous and seamless integrated structure. Can effectively guarantee sealing performance to avoided the assembly hole to the structural strength's of diaphragm body influence, prolonged the life of diaphragm body. Meanwhile, the boss 101 covers the piston insert 2 and is used for pumping water in a cavity below the diaphragm chamber in a reciprocating linear motion manner.

The central column 201 is provided with a plurality of through holes 206 extending along the axial direction of the central column 201, the bottom surface of the diaphragm body 1 is provided with an insert 104 filling the through holes 206 for connecting the diaphragm body 1 and the piston insert 2 into a whole, and the insert 104 is specifically arranged at the bottom surface of the cavity 102.

As shown in fig. 6 and 7, a groove 301 matched with the piston insert 2 is formed in the piston frame 3, and the bottom end of the piston insert 2 is inserted into the groove 301. The bottom of the piston insert 2 is provided with at least one limiting straight surface 207, the inner wall of the groove 301 is provided with a limiting inner wall 302 corresponding to the limiting straight surface 207, the shape of the inner wall of the groove 301 is matched with the shape of the bottom end of the piston insert 2, the assembling accuracy is guaranteed, and meanwhile the connection stability of the piston insert 2 and the piston frame 3 is guaranteed.

The central column 201 is provided with a screw hole 205, and the screw hole 205 extends along the central axis of the central column 201. The bottom of the groove 301 is provided with a bottom screw hole 303. And the bottom surface of the piston frame 3 is provided with a connecting screw 4. The connecting screw 4 penetrates through a bottom screw hole 303 of the groove 301 from one side of the bottom surface of the piston frame 3 to be connected with the screw hole 205, so that the piston insert 2 and the piston frame 3 are connected and assembled.

The diaphragm body 1 and the piston insert 2 form an integral structure through a secondary injection molding process. In the machining production, the piston insert 2 is manufactured through injection molding, and an integrated structure of the central column 201, the first limiting table 202, the second limiting table 203, the screw hole 205 and the through hole 206 is machined. And in the second step, the processed piston insert 2 is placed into a mold of the diaphragm body 1 for secondary injection molding operation. The mold of the diaphragm body 1 is used for constructing the outer contour structures of the diaphragm body 1, the boss 101 and the annular sleeve 103, the limiting gap 204 and the through hole 206 are filled with injection molding materials of the diaphragm body 1 in the secondary injection molding process to respectively form the annular sleeve 103 and the insert 104 correspondingly, the top ends of the screw holes 205 are partially filled, and the injection molding materials cover the first limiting table 202. Finally, the diaphragm body 1 and the piston insert 2 form a firm integral structure. The piston insert 2 and the diaphragm body 1 form an integrated structure through secondary injection molding, and the piston insert 2 and the diaphragm body 1 can be made of corresponding materials respectively to meet corresponding performance requirements.

Claims

1. The utility model provides a mounting structure of diaphragm pump diaphragm, includes diaphragm body (1), its characterized in that: the diaphragm is characterized in that a plurality of piston inserts (2) are arranged on the bottom surface of the diaphragm body (1), the tops of the piston inserts are coated by the diaphragm body (1) and connected, and the lower parts of the piston inserts (2) are connected with the piston frame (3).

2. A diaphragm pump diaphragm mounting structure according to claim 1, wherein: the piston insert (2) and the diaphragm body (1) form an integral structure through secondary injection molding.

3. A diaphragm pump diaphragm mounting structure according to claim 1, wherein: the diaphragm is characterized in that a boss (101) is arranged on the top surface of the diaphragm body (1) and corresponds to the position of the piston insert (2), and the top of the piston insert (2) is embedded below the boss (101).

4. A diaphragm pump diaphragm mounting structure according to claim 1, wherein: the diaphragm is characterized in that a concave cavity (102) is formed in the bottom surface of the diaphragm body (1), the wall of the concave cavity protrudes out of the top surface of the diaphragm body (1) to form a boss (101), and the top of the piston insert (2) is embedded into the concave cavity (102).

5. The diaphragm pump diaphragm mounting structure of claim 4, wherein: a first limiting table (202) and a second limiting table (203) are respectively arranged on the piston insert (2), and a limiting gap (204) is formed between the first limiting table (202) and the second limiting table (203); the first limiting table (202) is embedded into the cavity (102), and the diaphragm body (1) covers the first limiting table (202) and the limiting gap (204).

6. The diaphragm pump diaphragm mounting structure of claim 5, wherein: the diaphragm body (1) bottom surface is equipped with annular cover (103), spacing space (204) between first spacing platform (202) of annular cover (103) embedding and second spacing platform (203).

7. A diaphragm pump diaphragm mounting structure according to claim 1, wherein: the piston insert (2) is provided with a plurality of through holes (206), and inserts (104) for connecting the diaphragm body (1) and the piston insert (2) into a whole are filled in the through holes.

8. A diaphragm pump diaphragm mounting structure according to claim 1, wherein: the piston rack (3) is provided with a groove (301) matched with the piston insert (2), and the bottom of the piston insert (2) is embedded into the groove (301).

9. A diaphragm pump diaphragm mounting structure according to claim 8, wherein: the bottom of the piston insert (2) is provided with at least one limiting straight surface (207), and the inner wall of the groove (301) is provided with a limiting inner wall (302) corresponding to the limiting straight surface (207), so that the shape of the inner wall of the groove (301) is matched with the shape of the bottom of the piston insert (2).

10. A mounting structure of a diaphragm pump diaphragm according to claim 1, 8 or 9, characterized in that: the bottom surface of the piston frame (3) is provided with a connecting screw (4), and the connecting screw (4) penetrates through the piston frame (3) from one side of the bottom surface of the piston frame (3) and then is connected with the piston insert (2).