CN220849967U

CN220849967U - Diaphragm pump

Info

Publication number: CN220849967U
Application number: CN202322726844.1U
Authority: CN
Inventors: 莫祖思; 徐振平; 李新春
Original assignee: Heitek Power Co ltd
Current assignee: Heitek Power Co ltd
Priority date: 2023-10-10
Filing date: 2023-10-10
Publication date: 2024-04-26
Anticipated expiration: 2033-10-10

Abstract

The utility model provides a diaphragm pump, includes the casing, form the pump chamber in the casing, set up the exhaust hole on the casing, the both ends in exhaust hole communicate pump chamber and casing outside respectively, set up the exhaust plug on the casing, the exhaust hole is stretched into to the one end of exhaust plug and is connected with the casing, just the exhaust plug is shutoff to the exhaust hole, through setting up the exhaust hole on the casing to set up the exhaust plug in the exhaust hole and can prevent that the ash layer from getting into the pump intracavity, improve the quality of oil in the pump, can breathe the trompil for the pump again, balanced the inside and outside atmospheric pressure of pump.

Description

Diaphragm pump

Technical Field

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

Background

The diaphragm pump is an important conveying device widely applied to various industrial fields, such as a running mechanism, a lifting mechanism, an amplitude changing mechanism and the like in the engineering machinery field. Although the working conditions are different, the working principles of the diaphragm pump are the same, the plunger is driven by the motor to reciprocate, and the motion of the plunger is transmitted to the diaphragm through liquid (generally oil) in the transmission chamber, so that the diaphragm is driven back and forth, and the pump is further operated. A known diaphragm pump driven by liquid is a high-pressure pump capable of sucking and delivering various liquids, and the diaphragm pump needs to balance the pressure inside and outside a pump cavity so as to prevent the diaphragm pump from being damaged due to overlarge pressure difference between the inside and the outside.

Disclosure of Invention

In view of this, the present utility model provides a diaphragm pump.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a diaphragm pump, includes the casing, form the pump chamber in the casing, set up the exhaust hole on the casing, the both ends in exhaust hole communicate pump chamber and casing outside respectively, set up the exhaust plug on the casing, the one end of exhaust plug stretches into the exhaust hole and is connected with the casing, just the exhaust plug carries out the shutoff to the exhaust hole.

Preferably, the exhaust plug comprises an exhaust plug seat, an exhaust plug cover and a thermoplastic pipe, wherein the exhaust plug seat is provided with a sealing connection part and a limiting part, the sealing connection part stretches into the exhaust hole to be connected with the shell, the top end of the limiting part sinks to form a mounting groove, and the exhaust plug cover is arranged in the mounting groove.

Preferably, the thermoplastic pipe is provided with a plug seat sealing part and a plug cover sealing part, the plug seat sealing part is sleeved on the limiting part, the plug cover sealing part is formed by extending the plug seat sealing part towards the center direction of the exhaust plug cover, one end of the exhaust plug cover, which is far away from the sealing connection part, is provided with an arc-shaped surface, and the thermoplastic pipe is attached to the edge of the arc-shaped surface.

Preferably, the exhaust plug cover is stuck and fixed with the wall of the mounting groove.

Preferably, one side of the shell is provided with an inner partition plate, an outer partition plate and a rear cover from left to right in sequence, the pump cavity is internally provided with a pump shaft, one side of the inner partition plate, which is close to the pump shaft, is inwards concave to form a pump shaft positioning part and a reducing exhaust groove, one end of the pump shaft extends into the pump shaft positioning part to be connected with the inner partition plate, the other end of the pump shaft extends into the outside of the shell, a plunger assembly is arranged in the reducing exhaust groove, a diaphragm is arranged between the plunger assembly and the outer partition plate, one end of the diaphragm is connected with the plunger assembly, the inner partition plate and the outer partition plate compress the diaphragm, and one side of the outer partition plate, which is close to the plunger assembly, is provided with a one-way valve group.

Preferably, a shaft sleeve is arranged on one side, far away from the inner partition plate, of the pump shaft, a swash plate is sleeved on the shaft sleeve, a gasket and a bearing are arranged between the swash plate and the shaft sleeve, a sliding shoe is arranged on the swash plate, and one end of the sliding shoe extends into the reducing exhaust groove to be connected with the plunger assembly.

Preferably, the plunger assembly comprises a plunger, a plunger sleeve, a fixing seat, a reset spring, a valve sleeve, a valve core and a bias spring, wherein one end of the plunger is connected with the sliding shoe, the plunger sleeve is arranged in the reducing exhaust groove, the fixing seat is arranged in the plunger sleeve, the fixing seat is provided with a spring connecting part, the reset spring is sleeved on the spring connecting part, a movable groove is formed in the fixing seat, the valve sleeve is arranged in the movable groove, one end of the valve core penetrates through the fixing seat and stretches into the movable groove to be connected with the valve sleeve, the other end of the valve core is connected with the diaphragm, and the bias spring is sleeved between the valve core and the valve sleeve.

Preferably, the diaphragm comprises a diaphragm pressing sheet, a diaphragm body, a diaphragm gasket and a countersunk head screw, wherein the diaphragm pressing sheet is fixed on the diaphragm body through the countersunk head screw, one end of the countersunk head screw sequentially penetrates through the diaphragm pressing sheet and the diaphragm body to be connected with the valve core, and the diaphragm gasket is sleeved on one side of the valve core, which is close to the diaphragm body.

Preferably, the valve core is arranged in a hollow structure, and a radial opening is formed in the valve core.

The utility model has the beneficial effects that: through set up the exhaust hole on the casing to set up the exhaust plug in the exhaust hole can prevent that the ash layer from getting into the pump intracavity, improve the quality of the interior fluid of pump, can breathe the trompil for the pump again, balanced the inside and outside atmospheric pressure balance of pump.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a schematic diagram of an exhaust plug;

fig. 3 is a schematic view of a plunger assembly.

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.

The utility model will be further described with reference to the drawings.

The utility model provides the following technical scheme:

As shown in fig. 1-3, the utility model discloses a diaphragm pump, which comprises a casing 5, wherein a pump cavity 25 is formed in the casing 5, an exhaust hole 26 is formed in the casing 5, two ends of the exhaust hole 26 are respectively communicated with the pump cavity 25 and the outside of the casing 5, an exhaust plug 20 is arranged on the casing 5, one end of the exhaust screw extends into the exhaust hole 26 to be connected with the casing 5, and the exhaust plug 20 plugs the exhaust hole 26. Specifically, in this design, through set up exhaust hole 26 on casing 5 to set up exhaust plug 20 in the exhaust hole 26 can prevent that the ash layer from getting into in the pump chamber 25, improve the quality of the interior fluid of pump, can breathe the trompil for the pump again, balanced the inside and outside atmospheric pressure balance of pump.

Further, the vent plug 20 includes a vent plug seat 21, a vent plug cover 22 and a thermoplastic pipe 23, the vent plug seat 21 has a sealing connection portion 48 and a limit portion 49, the sealing connection portion 48 extends into the vent hole 26 to be in threaded connection with the housing 5, the top end of the limit portion 49 is sunk to form a mounting groove 50, and the vent plug cover 22 is disposed in the mounting groove 50. Specifically, in this embodiment, the exhaust plug seat 21 and the exhaust plug cover 22 are both sprayed with red color, so that an operator can conveniently observe and identify the exhaust plug 20, and the exhaust plug seat 21 and the exhaust plug cover 22 are both made of nylon, so that the weight of the whole diaphragm 14 pump can be reduced; the exhaust plug seat 21, the exhaust plug cover 22 and the thermoplastic pipe 23 are connected through the sealant 24, so that not only can a good sealing effect be achieved, but also an ash layer can be prevented from entering the pump, and the oil quality is influenced; when the pressure in the diaphragm 14 increases or decreases, the exhaust plug 20 can maintain the pressure in the pump consistent with the atmospheric pressure and balance the pressure inside and outside the pump.

Further, the thermoplastic pipe 23 has a plug seat sealing portion 51 and a plug cover sealing portion 52, the plug seat sealing portion 51 is sleeved on the limiting portion 49, the plug cover sealing portion 52 is formed by extending the plug seat sealing portion 51 toward the center direction of the vent plug cover 22, one end of the vent plug cover 22 away from the sealing connection portion 48 has an arc-shaped surface 53, and the thermoplastic pipe 23 is attached to the edge of the arc-shaped surface 53. Specifically, in the present embodiment, after the thermoplastic pipe 23 is sleeved on the exhaust plug seat 21, the thermoplastic pipe 23 can be attached to the limiting portion 49 of the exhaust plug seat 21 and part of the outer surface of the exhaust plug cover 22 through heating plasticity, so as to improve the tightness between the exhaust plug seat 21 and the exhaust plug cover 22 and further reduce the entry of dust.

Further, the exhaust plug cover 22 is adhered and fixed to the wall of the installation groove 50 through the sealant 24.

Further, one side of the casing 5 is provided with an inner partition plate 3, an outer partition plate 2 and a rear cover 1 in sequence from left to right, a pump shaft 7 is arranged in the pump cavity 25, one side of the inner partition plate 3, which is close to the pump shaft 7, is inwards concave to form a pump shaft 7 positioning part and a variable-diameter exhaust groove 33, one end of the pump shaft 7 extends into the pump shaft 7 positioning part to be connected with the inner partition plate 3, the other end of the pump shaft 7 extends into the outside of the casing 5, a plunger assembly 32 is arranged in the variable-diameter exhaust groove 33, a diaphragm 14 is arranged between the plunger assembly 32 and the outer partition plate 2, one end of the diaphragm 14 is connected with the plunger assembly 32, the inner partition plate 3 and the outer partition plate 2 compress the diaphragm 14, one side, which is close to the plunger assembly 32, of the one side, which is far away from the inner partition plate 3, of the one side, which is close to the pump shaft 7, is provided with a shaft sleeve 9, is sleeved with a swash plate 11, a gasket 10 and a bearing are arranged between the swash plate 11 and the shaft sleeve 9, a shoe 12 is arranged on the swash plate 11, and one end of the shoe 12 extends into the variable-diameter exhaust groove 33 to be connected with the plunger assembly 32. Specifically, the diaphragm 14 pump has a pump shaft 7, and the pump shaft 7 is fixed in the diaphragm 14 pump housing 5 by a large tapered roller bearing 8 at the rear of the shaft and a small tapered roller bearing 8 at the front of the shaft. Leakage of oil is avoided between the pump shaft 7 and the housing 5 through the oil seal 6. The upper part of the housing 5 is closed by a cover plate and an exhaust plug 20. Meanwhile, each tapered roller bearing 8 is positioned in a matched manner with the housing 5 and the pump shaft 7 through the shaft sleeve 9, the bearing pressing plate 19 and the bearing gasket 16, and a gasket 10 is arranged between the tapered roller bearings 8. The swash plate 11 with a fixed angle is sleeved outside the tapered roller bearing 8, and when the pump shaft 7 starts to work, the swash plate 11 is driven to rotate together, and the sliding shoes 12 generate a front-back swing due to a certain angle of the swash plate 11, so that three plungers 13 (only two are shown in the figure) are driven to move linearly front and back. The plunger 13 is matched with the inner partition plate 3 to form a closed area, and when the closed area is full of oil, the oil drives the diaphragm 14 to realize the liquid suction and transfusion process of the diaphragm 14 pump by the diaphragm 14. The diaphragm 14 is positioned by the inner diaphragm 3, the outer diaphragm 2, the diaphragm gasket 45, the diaphragm pressing piece 43 and the cross groove countersunk head screw 44. Wherein each diaphragm 14 has a corresponding pumping chamber 54, pumping chamber 54 is provided on the inner partition, one-way valve block 15 is provided in pumping chamber 54, and one-way valve block 15 includes an inlet one-way valve 55 and an outlet one-way valve 56. When the diaphragm 14 contracts, oil enters the pump through the inlet on the rear cover 1 and the inlet check valve 55; when the diaphragm 14 expands, oil is discharged out of the pump through the outlet check valve 56 and the outlet on the rear cover 1; repeated contraction and expansion of the diaphragm 14 achieves continued operation of the diaphragm 14 pump by the diaphragm 14.

Further, the plunger assembly 32 is provided with three plunger assemblies, the plunger assembly 32 comprises a plunger 13, a plunger sleeve 27, a fixing seat 47, a return spring 31, a valve sleeve 38, a valve core 39 and a bias spring 41, one end of the plunger 13 is connected with the sliding shoe 12, the plunger sleeve 27 is arranged in the reducing exhaust groove 33, the fixing seat 47 is arranged in the plunger sleeve 27, the fixing seat 47 is provided with a spring connecting part 28, the return spring 31 is sleeved on the spring connecting part 28, the fixing seat 47 is provided with a movable groove, the valve sleeve 38 is arranged in the movable groove, one end of the valve core 39 penetrates through the fixing seat 47 and stretches into the movable groove to be connected with the valve sleeve 38, the other end of the valve core 39 is connected with the diaphragm 14, the bias spring 41 is sleeved between the valve core 39 and the valve sleeve 38, the diaphragm 14 comprises a diaphragm pressing sheet 43, a diaphragm body 29, a diaphragm gasket 45 and a countersunk screw 44, the diaphragm pressing sheet 43 is fixed on the diaphragm body 29 through the countersunk screw 44, one end of the countersunk screw 44 is sequentially connected with the diaphragm pressing sheet 43 and the diaphragm body 29, and one end of the countersunk screw 44 is arranged on one side of the valve core 45 near the valve core 39. Specifically, the diaphragm 14 separates the hydraulically driven side from the pump inlet side. On the hydraulic drive side, the return spring 31, the plunger 13 and its components are included in a closed section acting as a transmission chamber 46 and filled with oil. The swash plate 11 contacts the shoes 12 to drive the movement of the plunger 13, and the shoes 12 are engaged with the plunger 13 through circlips for holes. Four steel balls 36 (only two shown) in the single plunger 13 space the oil in the transfer chamber 46 from an oil reservoir (not shown). An exhaust groove is arranged between the plunger 13 and the top of the inner partition plate 3; the steel ball 36 acts as a check valve and the plunger 13 reciprocates in the inner partition 3. A holder 47 is included in the plunger 13 and includes a gasket 10, O-ring 34 for providing a pressure-dispersing and sealing action between the holder 47 and the plunger 13. The opposite end of the holder 47 is connected to the valve sleeve 38 by an O-ring 34, wherein the valve element 39 is connected to the holder 47 by a spring which moves the valve element 39 immediately to the left of the valve port 40 when the oil pressure in the transmission chamber 46 is less than the pressure in the reservoir. The valve core 39 extends from the opening of the valve housing 38 to the diaphragm 14 on the side of the transfer chamber 46 and clamps the diaphragm 14 at one end of the valve core 39 using a diaphragm press plate 43, a cross-slot countersunk head screw 44, and a diaphragm washer 45. The spool 39 is hollow and is provided with three radial openings 42. When the steel ball 36 is opened, there is oil communication between the oil reservoir and the transmission chamber 46 through the space in which the spring is located, the hollow portion of the spool 39 and the radial opening 42. At the same time, the hollow portion of the spool 39, together with the radial opening 42, provides oil communication from the portion in the transmission chamber 46 to the portion in the valve sleeve 38.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A diaphragm pump comprising a housing, a pump chamber formed within the housing, characterized in that: the exhaust hole is formed in the shell, two ends of the exhaust hole are respectively communicated with the pump cavity and the outside of the shell, the exhaust plug is arranged on the shell, one end of the exhaust plug extends into the exhaust hole to be connected with the shell, and the exhaust plug is used for plugging the exhaust hole.

2. A diaphragm pump according to claim 1, characterized in that: the exhaust plug comprises an exhaust plug seat, an exhaust plug cover and a thermoplastic pipe, wherein the exhaust plug seat is provided with a sealing connection part and a limiting part, the sealing connection part stretches into the exhaust hole to be connected with the shell, the top end of the limiting part sinks to form an installation groove, and the exhaust plug cover is arranged in the installation groove.

3. A diaphragm pump according to claim 2, characterized in that: the thermoplastic pipe is provided with a plug seat sealing part and a plug cover sealing part, the plug seat sealing part is sleeved on the limiting part, the plug cover sealing part is formed by extending the plug seat sealing part towards the center direction of the exhaust plug cover, one end of the exhaust plug cover, which is far away from the sealing connecting part, is provided with an arc-shaped surface, and the thermoplastic pipe is attached to the edge of the arc-shaped surface.

4. A diaphragm pump according to claim 2, characterized in that: and the exhaust plug cover is stuck and fixed with the wall of the mounting groove.

5. A diaphragm pump according to claim 1, characterized in that: one side of casing sets gradually interior baffle, outer baffle and hou gai from a left side to the right side, the pump intracavity sets up the pump shaft, one side indent that the interior baffle is close to the pump shaft forms pump shaft location portion and reducing exhaust groove, the one end of pump shaft stretches into pump shaft location portion and is connected with interior baffle, the other end of pump shaft stretches into the casing outside, set up the plunger subassembly in the reducing exhaust groove, set up the diaphragm between plunger subassembly and the outer baffle, the one end and the plunger subassembly of diaphragm are connected, just interior baffle and outer baffle compress tightly the diaphragm, one side that the outer baffle is close to the plunger subassembly sets up the check valve group.

6. The diaphragm pump of claim 5 wherein: the pump shaft is provided with a shaft sleeve on one side far away from the inner partition plate, a swash plate is sleeved on the shaft sleeve, a gasket and a bearing are arranged between the swash plate and the shaft sleeve, a sliding shoe is arranged on the swash plate, and one end of the sliding shoe extends into the reducing exhaust groove to be connected with the plunger assembly.

7. The diaphragm pump of claim 6 wherein: the plunger assembly comprises a plunger, a plunger sleeve, a fixed seat, a return spring, a valve sleeve, a valve core and a bias spring, wherein one end of the plunger is connected with the sliding shoe, the plunger sleeve is arranged in a reducing exhaust groove, the fixed seat is arranged in the plunger sleeve, the fixed seat is provided with a spring connecting part, the return spring is sleeved on the spring connecting part, a movable groove is formed in the fixed seat, the valve sleeve is arranged in the movable groove, one end of the valve core penetrates through the fixed seat and stretches into the movable groove to be connected with the valve sleeve, the other end of the valve core is connected with the diaphragm, and the bias spring is sleeved between the valve core and the valve sleeve.

8. The diaphragm pump of claim 7 wherein: the diaphragm comprises a diaphragm pressing sheet, a diaphragm body, a diaphragm gasket and a countersunk head screw, wherein the diaphragm pressing sheet is fixed on the diaphragm body through the countersunk head screw, one end of the countersunk head screw sequentially penetrates through the diaphragm pressing sheet and the diaphragm body to be connected with a valve core, and the diaphragm gasket is sleeved on one side of the valve core, which is close to the diaphragm body.

9. The diaphragm pump of claim 7 wherein: the valve core is arranged in a hollow structure, and a radial opening is formed in the valve core.