CN210397049U - Novel soft piston diaphragm pump - Google Patents

Abstract

The utility model particularly relates to a novel soft piston diaphragm pump, including base, frame, hydraulic cylinder cover, hydraulic piston, installation guide ring and piston ring on the hydraulic piston, its both sides are equipped with the hydro-cylinder end cover, are provided with the sealing washer between hydro-cylinder end cover and hydraulic cylinder cover, be equipped with oil blanket and dust seal between hydro-cylinder end cover and the hydraulic piston rod, piston rod on the hydraulic piston is fixed with the diaphragm seat, the diaphragm cavity is buckled mutually with diaphragm chamber cover, and diaphragm outer fringe clamping ring compresses tightly the diaphragm outer fringe, diaphragm seat and diaphragm inner edge clamping ring compress tightly the diaphragm inner edge. The utility model discloses being reciprocating motion by the piston rod in promoting the both sides cavity and being fixed in the rubber diaphragm on the piston, opening the suction valve group and inhaling the slurry under the inherent negative pressure of cavity and malleation alternate action, opening the discharge valves when closing the suction valve group after that, make the slurry discharge the cavity under the thrust effect of piston and diaphragm, both sides piston alternate action reaches the purpose of steadily carrying the slurry.

Description

Novel soft piston diaphragm pump

Technical Field

The utility model belongs to the technical field of the liquid pump, concretely relates to novel soft piston diaphragm pump.

Background

At present, the domestic and foreign diaphragm pumps are mainly divided into the following three types according to the diaphragm driving mode:

1. mechanical type

The power part of the mechanical diaphragm pump is a crank-link mechanism driven by a motor and a speed reducer. A relatively small diameter disk-like member is mounted at the forward end of the connecting rod for connection to the internal bore of the diaphragm. The diaphragm is driven to reciprocate. The disadvantages of the mechanical diaphragm pump are: the power part has a complex structure and low mechanical efficiency. Because the mechanical diaphragm pump adopts the diaphragm with the conical section, and the diameter of the disc part connected with the diaphragm is smaller, the stress area of the diaphragm is large, the deformation of the diaphragm during working is large, and the damage of the diaphragm is very easy to cause.

2. Pneumatic type

The power source of the pneumatic diaphragm pump is high-pressure compressed air. The diaphragm is driven to reciprocate by high-pressure compressed air. The pneumatic diaphragm pump has the following defects: and a high-power air compressor needs to be arranged, so that the energy consumption is high. The diaphragm with the conical section has a large stress area, and the diaphragm is large in deformation during working, so that the diaphragm is very easy to damage. The compressed air generates a loud noise when discharged.

3. Hydraulic type

The power source of the hydraulic diaphragm pump is a hydraulic cylinder driven by a pump station. A piston rod in the hydraulic cylinder drives a middle hydraulic cylinder, and then the piston in the middle hydraulic cylinder pushes hydraulic oil to drive the diaphragm to reciprocate. However, the hydraulic diaphragm pump wastes time and labor for maintenance and replacement after the abrasion failure of power end parts occurs in the use process, and has the defects of pressure loss and oil supplementing and discharging system caused by the abrasion of main parts of a hydraulic system, various system fault association of an electric control system and the like caused by the damage of the diaphragm.

Has the following disadvantages: the maintenance and the replacement of the power end part after the wear failure are time-consuming and labor-consuming; wear of main parts of hydraulic system

Secondly, the traditional piston pump has the advantages of large working pressure and high efficiency. But the structure is complex, the number of parts is large, and the requirement on manufacturing precision is high, so the manufacturing and maintenance cost is high. The plunger pump has higher requirements on the operating environment and lubricating oil; when thick ore pulp is conveyed, the plunger and the cylinder wall are directly washed by the slurry, so that the service lives of the plunger, the cylinder and the sealing piece are greatly reduced. The plunger pump has large flow pulsation, so that the running stability of the transmission system is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem existing in the prior art, the utility model provides a novel soft piston diaphragm pump.

The utility model adopts the technical proposal that:

a novel soft piston diaphragm pump, which comprises a diaphragm,

the hydraulic piston is provided with a guide ring and a piston ring, oil cylinder end covers are arranged on two sides of the hydraulic piston, a sealing ring is arranged between the oil cylinder end cover and the hydraulic cylinder sleeve, an oil seal and a dust seal are arranged between the oil cylinder end cover and the hydraulic piston rod, two ends of a piston rod on the hydraulic piston extend into a diaphragm cavity and are fixed with a diaphragm seat, the diaphragm cavity is buckled with the diaphragm cavity cover, a diaphragm outer edge pressing ring presses a diaphragm outer edge, and the diaphragm seat and the diaphragm inner edge pressing ring press a diaphragm inner edge. The diaphragm chamber lid, the diaphragm and the chamber that the diaphragm seat formed are the working chamber, the outlet pipe is connected to the working chamber upper end, is provided with the outlet valve assembly on the outlet pipe, the charge-in pipeline is connected to the working chamber lower extreme, is provided with the inlet valve assembly on the charge-in pipeline, the diaphragm cavity is the backpressure chamber with the chamber that the diaphragm formed, it fills the mouth to be equipped with nitrogen gas on the diaphragm cavity.

Preferably, still include pneumatic cylinder buffering subassembly, this pneumatic cylinder buffering subassembly includes left hydraulic fluid port, right hydraulic fluid port, needle valve, damping hole and end cap, left side hydraulic fluid port and right hydraulic fluid port set up and sheathe in at the pneumatic cylinder to be located the piston top, damping hole and needle valve setting are sheathe in at the pneumatic cylinder to be located same vertical axis, be provided with the needle valve sealing washer on the needle valve, the end cap setting is between hydraulic cylinder cover and hydro-cylinder end cover.

Preferably, a lifting ring is arranged on the hydraulic cylinder sleeve.

Preferably, a feeding tank is arranged at the inlet of the feeding pipeline.

The utility model has the advantages that:

1. the utility model discloses a supporting high-power hydraulic pressure station drive two effect hydraulic cylinder realizes power supply, replaces traditional bent axle link mechanism. The hydraulic system has the characteristics of stable operation, large and adjustable pressure, low failure rate, easy maintenance and the like, and the operation cost and the energy consumption are greatly reduced.

2. The utility model discloses being reciprocating motion by the piston rod in promoting the both sides cavity and being fixed in the rubber diaphragm on the piston, opening the suction valve group and inhaling the slurry under the inherent negative pressure of cavity and malleation alternate action, opening the discharge valves when closing the suction valve group after that, make the slurry discharge the cavity under the thrust effect of piston and diaphragm, both sides piston alternate action reaches the purpose of steadily carrying the slurry.

3. The utility model discloses there is nitrogen gas as the backpressure to support at the during operation diaphragm, can effectively reduce the deflection deformation volume of diaphragm and improve diaphragm life, reduces the down maintenance time and practices thrift manufacturing cost.

4. For the pulsation impact that reduces the pump package, guarantee the stationarity of carrying, the utility model discloses according to the difference of carrying medium and carrying load, through the modularization interface random combination that sets up in advance, realize many pump packages stack and use.

5. A feeding tank is additionally arranged on the inlet pipeline, so that the continuity of feeding is ensured, and the phenomena of vacuum and cavitation are reduced; the nitrogen bag is additionally arranged on the outlet pipeline, and the flexibility of the nitrogen bag is utilized to absorb and release the pulsating energy, so that the running stability of the pipeline system is ensured.

6. The novel soft piston diaphragm pump can select the valve group form more suitable for the characteristic of the conveying medium according to the difference of the conveying medium, and the valve group forms such as a ball valve, a plate valve or a cone valve are replaced at will by utilizing the modular valve box interface, so that the resistance to the pipeline caused by the matching problem of the valve group form and the medium can be effectively reduced, and the conveying capacity and the stability of the pipeline are improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the hydraulic cylinder of the present invention;

FIG. 3 is a diagram of a hydraulic station structure of the present invention;

FIG. 4 is a structural diagram of a single soft piston diaphragm pump according to the present invention;

fig. 5 is a structural diagram of the double soft piston diaphragm pump of the present invention.

Wherein: 1. a base; 2. a frame; 3. a hydraulic cylinder sleeve; 4. a piston; 5. a piston ring; 6. an oil cylinder end cover; 7. a seal ring; 8. oil sealing; 9. sealing by dust; 10. a diaphragm seat; 11. a diaphragm; 12. pressing rings are arranged on the inner edge of the diaphragm; 13. a diaphragm chamber cover; 14. a diaphragm cavity; 15. a nitrogen inlet and outlet; 16. a guide ring; 17. a hoisting ring; 18. an outlet valve assembly; 19. a piston rod; 20. pressing rings at the outer edges of the diaphragms; 21. an inlet valve assembly; 22. a feed pipe;

23. a needle valve; 24. a right oil port; 25. a left oil port; 26. a needle valve seal ring; 27. a damping hole; 28. and (7) a plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model discloses a novel soft piston diaphragm pump, which comprises a base 1 and a frame 2 fixed on the base 1, wherein a hydraulic cylinder sleeve 3 is fixed on the frame 2, a hanging ring 17 is arranged on the hydraulic cylinder sleeve, a hydraulic piston 4 is arranged on the hydraulic cylinder sleeve 3, a guide ring 16 and a piston ring 5 are arranged on the hydraulic piston 4, a cylinder end cover 6 is arranged on both sides of the hydraulic cylinder sleeve, a sealing ring 7 is arranged between the cylinder end cover 6 and the hydraulic cylinder sleeve 3, an oil seal 8 and a dust seal 9 are arranged between the cylinder end cover 6 and a piston rod 19, both ends of the piston rod 19 on the hydraulic piston 4 extend into a diaphragm cavity 14 and are fixed with a diaphragm seat 10, the diaphragm cavity 14 is buckled with a diaphragm cavity cover 13, a diaphragm outer edge pressing ring 20 presses the outer edge of a diaphragm 11, the diaphragm seat 10 is arranged in a cavity formed by the diaphragm cavity 14 and the diaphragm cavity cover 13, diaphragm seat 10 compresses tightly the diaphragm inner edge with diaphragm inner edge clamping ring 12, the cavity that diaphragm cavity 14, diaphragm chamber lid 13, diaphragm 11 and diaphragm seat 10 formed is the working chamber, outlet pipe is connected to the working chamber upper end, is provided with outlet valve assembly 18 on outlet pipe, feed line 22 is connected to the working chamber lower extreme, is provided with inlet valve assembly 21 on feed line 22 entrance is provided with the feed tank, the cavity that diaphragm cavity 14 and diaphragm 11 formed is the backpressure cavity, be equipped with nitrogen gas inlet and outlet 15 on the diaphragm cavity 14.

The base 1 is cast by concrete, the concrete base and the frame 2 arranged on the base 1 support and fix the soft piston diaphragm pump, the hydraulic piston 4 can reciprocate under the action of a hydraulic station and an electromagnetic directional valve, the oil cylinder end covers 6 arranged on two sides of the hydraulic piston 4 limit the left limit position and the right limit position of the hydraulic piston 4, and nitrogen is filled through the nitrogen inlet and outlet 15 to support the diaphragm 11.

Referring to fig. 2, still include pneumatic cylinder buffering subassembly, this pneumatic cylinder buffering subassembly includes left hydraulic fluid port 25, right hydraulic fluid port 24, needle valve 23, damping hole 27 and end cap 28, left side hydraulic fluid port 25 and right hydraulic fluid port 24 set up on hydraulic cylinder sleeve 3 to be located hydraulic piston 4 top, damping hole 27 and needle valve 23 set up on hydraulic cylinder sleeve 3 to be located same vertical axis, be provided with needle valve sealing washer 26 on the needle valve 23, end cap 28 sets up between hydraulic cylinder sleeve 3 and hydro-cylinder end cover 6.

When the right oil port 24 is filled with oil, the hydraulic piston 4 moves leftwards, hydraulic oil is discharged from the left oil port 25, the hydraulic piston 4 continues to move and gradually blocks the left oil port 25, the hydraulic oil flows to the left oil port 25 through the adjustable damping hole 27 and is discharged, the flow is reduced to realize buffering, and the adjustment of the buffering damping size is realized through the adjusting needle valve 23. When the left oil port 25 is filled with oil, hydraulic oil enters the cavity on the left side of the hydraulic piston 4 through the adjustable damping hole 27, the hydraulic piston 4 is pushed to move rightwards, the left oil port 25 is gradually opened, and the hydraulic piston 4 is pushed along with the oil due to the increase of the flow. And vice versa.

As shown in figure 3, each pump set utilizes an independent hydraulic station to deliver power, so that the delivery of enough power can be ensured, and the normal work of other pump sets can be prevented from being influenced when a certain pump set or hydraulic station breaks down. So that the pump set is overhauled and troubleshooting is carried out under the condition of not influencing normal production.

As shown in fig. 4 to 5, according to the requirement of the production system for the slurry dosage, a pre-designed combination interface can be used for modular stacking combination of multiple pump groups. After the multiple pump groups are overlapped and combined, the conveying capacity of the pump groups is improved by integral times, if the flow exceeds the flow required by a production system, part of the pump groups can be closed to reduce the conveying flow, and the flow is effectively prevented from being excessive. Thereby saving energy consumption and reducing production cost.

Above-mentioned pump package can select for use the valves form that more is fit for carrying the medium characteristic according to the difference of carrying the medium, utilizes valves forms such as modularization valve case interface change ball valve, plate valve or cone valve wantonly, can effectively reduce the resistance that causes the pipeline because of the matching problem of valves form and medium, promotes the stationarity of carrying capacity and pipeline.

The present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit and scope of the present invention by those skilled in the art.

Claims (4)

1. A novel soft piston diaphragm pump is characterized by comprising a base and a frame fixed on the base, wherein a hydraulic cylinder sleeve is fixed on the frame, a hydraulic piston is arranged in the hydraulic cylinder sleeve, a guide ring and a piston ring are mounted on the hydraulic piston, cylinder end covers are arranged on two sides of the hydraulic piston, a sealing ring is arranged between the cylinder end cover and the hydraulic cylinder sleeve, an oil seal and a dust seal are arranged between the cylinder end cover and the hydraulic piston rod, two ends of the piston rod on the hydraulic piston extend into a diaphragm cavity and are fixed with a diaphragm seat, the diaphragm cavity is buckled with a diaphragm cavity cover, a diaphragm outer edge pressing ring presses a diaphragm outer edge, the diaphragm seat and a diaphragm inner edge pressing ring press a diaphragm inner edge, a cavity formed by the diaphragm cavity cover, the diaphragm and the diaphragm seat is a working cavity, the upper end of the working cavity is connected with an outlet pipeline, and an outlet valve assembly is arranged, the lower end of the working cavity is connected with a feeding pipeline, an inlet valve assembly is arranged on the feeding pipeline, a cavity formed by the diaphragm cavity and the diaphragm is a back pressure cavity, and a nitrogen charging and discharging port is formed in the diaphragm cavity.

2. The novel soft piston diaphragm pump of claim 1, characterized in that, still includes pneumatic cylinder buffering subassembly, this pneumatic cylinder buffering subassembly includes left hydraulic fluid port, right hydraulic fluid port, needle valve, damping hole and end cap, left hydraulic fluid port and right hydraulic fluid port set up on the pneumatic cylinder cover to be located the piston top, damping hole and needle valve setting are sheathe in the pneumatic cylinder to be located same vertical axis, be provided with the needle valve sealing washer on the needle valve, the end cap setting is between hydraulic cylinder cover and hydro-cylinder end cover.

3. A novel soft piston diaphragm pump according to claim 1 wherein a lifting ring is provided on the cylinder jacket.

4. A novel soft piston diaphragm pump according to claim 1 wherein a feed tank is provided at the inlet of the feed conduit.

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