CN219888226U - Diaphragm pump - Google Patents

Abstract

The utility model discloses a diaphragm pump, which comprises a pump shell, wherein at least two mounting openings are arranged on the surface of the pump shell, a pump cover is arranged on the mounting openings, a water outlet cavity which is positioned at the periphery of the pump shell is arranged on the front side wall of the pump shell, a water outlet hole is arranged on the water outlet cavity, a water inlet cavity which is positioned at the periphery of the pump shell is arranged on the rear side wall of the pump shell, water inlets are arranged on the water inlet cavity, openings which are connected with the water inlet cavity and the water outlet cavity are respectively arranged at the front end and the rear end of the pump cover, one-way valves are arranged on the openings, a driving shaft which penetrates through the front side and the rear side surface of the pump shell is arranged on the pump shell, the driving shaft is in sealing connection with the pump shell, an eccentric structure is arranged at the middle part of the driving shaft, a piston structure which is the same as the number of the pump cover is arranged, and lubricating oil is filled in the pump shell at the piston structure.

Description

Diaphragm pump

Technical Field

The utility model relates to the technical field of diaphragm pumps, in particular to a diaphragm pump.

Background

Diaphragm pumps, also known as control pumps, operate with power to vary the flow of fluid; the diaphragm pump structurally separates the transfusion body from the movable column and the pump cylinder by a film, so that the movable column and the pump cylinder are protected; the film separates the infusion body from the movable column and the pump cylinder, so that the infusion body cannot effectively cool the pump body, and the operation temperature of the pump body is higher.

Disclosure of Invention

The utility model aims to provide a diaphragm pump which overcomes the defects of the prior art.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the utility model provides a diaphragm pump, includes the pump case, be equipped with two at least installing ports on the surface of pump case, install the pump cover on the installing port, be equipped with a water outlet cavity that is located the pump case periphery on the preceding lateral wall of pump case, be equipped with the apopore on the water outlet cavity, be equipped with a water inlet cavity that is located the pump case periphery on the back lateral wall of pump case, be equipped with the inlet opening on the water inlet cavity, both ends are equipped with an trompil that is connected with water inlet cavity and water outlet cavity respectively around the pump cover, install the check valve on the trompil, install the drive shaft that passes pump case front side and rear side surface on the pump case, sealing connection between drive shaft and the pump case, the middle part of drive shaft is equipped with eccentric structure, eccentric structure department is equipped with the piston structure the same with pump cover quantity, the pump case intussuseption of piston structure department is filled with lubricating oil.

Furthermore, the driving shaft is rotationally connected with the pump shell through a clamping ring and a bearing, and an oil seal is further arranged between the pump shell outside the bearing and the driving shaft.

Further, a water inlet connector is arranged on the water inlet hole.

Further, the pump shell is also provided with an oil filling hole, and an oil filling cup is arranged on the oil filling hole; the bottom of the pump shell is also provided with an oil discharge port, and an oil discharge bolt is arranged on the oil discharge port.

Further, the piston structure comprises a piston sleeve, a piston, a connecting rod ring and a diaphragm, wherein the piston sleeve is fixedly arranged on an installation port, the piston is arranged in the piston sleeve, a piston pin which is rotationally connected with the top of the connecting rod is arranged in the piston, an arc-shaped part is arranged at the bottom of the connecting rod, two clamping grooves are respectively arranged on the front side and the rear side of the outer surface of the arc-shaped part, the connecting rod ring is respectively arranged at the clamping grooves on the front side and the rear side of the arc-shaped part, the arc-shaped part on the outer side of the eccentric structure is clamped on the outer surface of the eccentric structure, and a circular structure is formed between the arc-shaped parts on the outer surface of the eccentric structure;

the diaphragm is fixedly arranged between the pump cover and the piston sleeve, the top of the piston sleeve is sealed by the diaphragm, a nut is fixedly arranged in the middle of the piston, the nut penetrates through the diaphragm, the top end of the nut is positioned in the pump cover, and the top end of the nut is connected with the middle of the diaphragm and the piston through a pressing plate nut and a diaphragm pressing plate.

Compared with the prior art, the utility model has the following implementation effects: according to the diaphragm pump, the piston structure is arranged around the driving shaft, and the water outlet cavity, the water inlet cavity and the pump body are of an integrated structure, so that fluid pumped by the diaphragm pump can cool the pump body, the inside of the pump body and lubricating oil can be cooled, and at least two piston structures are arranged on the diaphragm pump, so that pumped fluid is stable.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the drive shaft and connecting rod configuration;

FIG. 4 is a schematic view of the drive shaft and connecting rod installation;

FIG. 5 is a schematic illustration of the configuration of the connecting rod in cooperation with the piston structure;

FIG. 6 is a schematic diagram of the connection of the piston structure to the pump cap;

fig. 7 is a B-B cross-sectional view of fig. 6.

Reference numerals illustrate: 1. a pump housing; 11. a piston sleeve; 12. a pump cover; 13. a water inlet cavity; 131. a water inlet joint; 14. an oil adding cup; 15. a water outlet cavity; 16. support legs; 2. a drive shaft; 20. a one-way valve; 21. an eccentric structure; 22. an arc-shaped portion; 23. a clamping groove; 24. a connecting rod; 25. a piston pin; 26. a bearing; 27. an oil seal; 28. a clasp; 3. a piston; 31. a diaphragm; 32. a diaphragm pressing plate; 33. a pressing plate nut; 4. and a connecting rod ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific direction to construct and operate in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-2, the diaphragm pump of the present utility model comprises a pump casing 1, wherein four mounting openings are arranged on the surface of the pump casing 1, a pump cover 12 is arranged on each mounting opening, and supporting legs 16 are arranged on the pump cover 12 positioned at the lower part of the pump casing 1; the front side wall of the pump shell 1 is provided with a water outlet cavity 15 positioned at the periphery of the pump shell 1, the water outlet cavity 15 is provided with a water outlet hole, the rear side wall of the pump shell 1 is provided with a water inlet cavity 13 positioned at the periphery of the pump shell 1, the water inlet cavity 13 is provided with a water inlet hole, and the water inlet hole is provided with a water inlet joint 131.

As shown in fig. 1-6, two openings connected with the water inlet cavity 13 and the water outlet cavity 15 are respectively arranged at the front end and the rear end of the pump cover 12, a one-way valve 20 is arranged on the openings, the one-way valve 20 at the water inlet cavity 13 only allows the fluid in the pump cover 12 to flow into the water inlet cavity 13, and the one-way valve 20 at the water outlet cavity 15 only allows the fluid in the water outlet cavity 15 to flow into the pump cover 12. The driving shaft 2 penetrating through the front side and the rear side of the pump shell 1 is arranged on the pump shell 1, the driving shaft 2 is rotationally connected with the pump shell 1 through a clamping ring 28 and a bearing 26, an oil seal 27 is further arranged between the pump shell 1 outside the bearing 26 and the driving shaft 2, sealing connection between the driving shaft 2 and the pump shell 1 is realized, an eccentric structure 21 is arranged in the middle of the driving shaft 2, piston structures with the same number as that of the pump covers 12 are arranged at the eccentric structure 21, lubricating oil is filled in the pump shell 1 at the piston structures, an oil filling hole is further arranged on the pump shell 1, and an oil filling cup 14 is arranged on the oil filling hole, so that lubricating oil is conveniently filled; the bottom of the pump shell 1 is also provided with an oil discharge port 17, and an oil discharge bolt 18 is arranged on the oil discharge port.

As shown in fig. 4-7, the piston structure comprises a piston sleeve 11, a piston 3, a connecting rod 24, a connecting rod ring 4 and a diaphragm 31, wherein the piston sleeve 11 is fixedly arranged on an installation port, the piston 3 is arranged in the piston sleeve 11, a piston pin 25 rotationally connected with the top of the connecting rod 24 is arranged in the piston 3, an arc-shaped part 22 is arranged at the bottom of the connecting rod 24, a clamping groove 23 is respectively arranged at the front side and the rear side of the outer surface of the arc-shaped part 22, two connecting rod rings 4 are respectively arranged at the clamping grooves 23 at the front side and the rear side of the arc-shaped part 22, the arc-shaped part 22 at the outer side of the eccentric structure 21 is clamped on the outer surface of the eccentric structure 21, and a circular structure is formed between the arc-shaped parts 22 at the outer surface of the eccentric structure 21; the diaphragm 31 is fixedly arranged between the pump cover 12 and the piston sleeve 11, the top of the piston sleeve 11 is sealed by the diaphragm 31, a nut is fixedly arranged in the middle of the piston 3, the nut penetrates through the diaphragm 31, the top end of the nut is positioned in the pump cover 12, and the diaphragm 31 is in sealing connection with the middle of the piston 3 through the pressing plate nut 33 and the diaphragm pressing plate 32.

When the high diaphragm pump works, the driving shaft 2 drives the eccentric structure 21 to rotate, the eccentric structure 21 sequentially extrudes the arc-shaped structures around the eccentric structure, and simultaneously the eccentric structure is pulled back through the fixing function of the connecting rod ring 4, so that the piston 3 drives the middle part of the diaphragm 31 to reciprocate, and fluid in the water outlet cavity 15 is sucked into the pump cover 12 and then extruded into the water inlet cavity 13. The water outlet cavity 15 and the water inlet cavity 13 of the diaphragm pump and the pump shell 1 are of an integrated structure, so that fluid pumped by the diaphragm pump can cool the pump shell 1, thereby cooling the inside of the pump shell 1 and lubricating oil, and four piston structures are arranged on the diaphragm pump, so that pumped fluid is stable.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A diaphragm pump comprising a pump housing, characterized in that: the pump is characterized in that at least two mounting openings are formed in the surface of the pump shell, a pump cover is mounted on each mounting opening, a water outlet cavity which is arranged around the pump shell is formed in the front side wall of the pump shell, water outlet holes are formed in the water outlet cavity, a water inlet cavity which is arranged around the pump shell is formed in the rear side wall of the pump shell, water inlet holes are formed in the water inlet cavity, openings which are connected with the water inlet cavity and the water outlet cavity are respectively formed in the front section and the rear section of the pump cover, one-way valves are mounted on the openings, driving shafts which penetrate through the front side and the rear side surface of the pump shell are mounted on the pump shell, the driving shafts are in sealing connection with the pump shell, eccentric structures are arranged in the middle of the driving shafts, piston structures with the same number as the pump cover are arranged at the eccentric structures, and lubricating oil is filled in the pump shell at the piston structures.

2. A diaphragm pump according to claim 1, characterized in that: the driving shaft is rotationally connected with the pump shell through a clamping ring and a bearing, and an oil seal is further arranged between the pump shell outside the bearing and the driving shaft.

3. A diaphragm pump according to claim 1, characterized in that: and a water inlet joint is arranged on the water inlet hole.

4. A diaphragm pump according to claim 1, characterized in that: the pump shell is also provided with an oil filling hole, and an oil filling cup is arranged on the oil filling hole; the bottom of the pump shell is also provided with an oil discharge port, and an oil discharge bolt is arranged on the oil discharge port.

5. A diaphragm pump according to claim 2, characterized in that: the piston structure comprises a piston sleeve, a piston, a connecting rod ring and a diaphragm, wherein the piston sleeve is fixedly arranged on an installation port, the piston is arranged in the piston sleeve, a piston pin which is rotationally connected with the top of the connecting rod is arranged in the piston, an arc-shaped part is arranged at the bottom of the connecting rod, two clamping grooves are respectively arranged on the front side and the rear side of the outer surface of the arc-shaped part, the connecting rod ring is respectively arranged at the clamping grooves on the front side and the rear side of the arc-shaped part, the arc-shaped part on the outer side of the eccentric structure is clamped on the outer surface of the eccentric structure, and a circular structure is formed between the arc-shaped parts on the outer surface of the eccentric structure;

the diaphragm is fixedly arranged between the pump cover and the piston sleeve, the top of the piston sleeve is sealed by the diaphragm, a nut is fixedly arranged in the middle of the piston, the nut penetrates through the diaphragm, the top end of the nut is positioned in the pump cover, and the top end of the nut is connected with the middle of the diaphragm and the piston through a pressing plate nut and a diaphragm pressing plate.