CN215927727U

CN215927727U - Novel three-cylinder single-action diaphragm pump hydraulic end

Info

Publication number: CN215927727U
Application number: CN202121703252.2U
Authority: CN
Inventors: 齐东杰; 李文明; 陈扬; 张恩龙; 张立华; 王江; 李宏宇; 齐轩; 王连丹; 孙丹龙
Original assignee: CNMC Shenyang Pump Co Ltd
Current assignee: CNMC Shenyang Pump Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-03-01
Anticipated expiration: 2031-07-26

Abstract

The utility model provides a novel three jars single action diaphragm pump fluid end belongs to diaphragm pump technical field, concretely relates to novel structure of supercritical high pressure three jars single action diaphragm pump fluid end. The utility model provides a diaphragm pump hydraulic end suitable for supercritical high-pressure fluid conveying. The utility model includes the base, there is the diaphragm pump body on the base, characterized by that: the middle and two sides of the diaphragm pump body are respectively provided with a diaphragm chamber, the three diaphragm chambers form an isosceles triangle, and the middle diaphragm chamber is the vertex of the isosceles triangle; the diaphragm axes of the two diaphragm chambers are in the same straight line, and the diaphragm axis of the middle diaphragm chamber is perpendicular to the diaphragm axes of the two diaphragm chambers.

Description

Novel three-cylinder single-action diaphragm pump hydraulic end

Technical Field

The utility model belongs to the technical field of diaphragm pumps, and particularly relates to a novel structure of a hydraulic end of a supercritical high-pressure three-cylinder single-action diaphragm pump.

Background

The hydraulic end of the diaphragm pump is one of the main components of a large-scale high-pressure three-cylinder single-action diaphragm pump, plays a key role in conveying a solid-liquid two-phase fluid, and plays a vital role in the safety and stability of the field complete machine operation of a user of the diaphragm pump in terms of the high-pressure diaphragm pump, particularly the supercritical working condition with the highest load pressure of 35 MPa.

With the continuous development of the diaphragm pump technology, the application field and the operation condition of the diaphragm pump are gradually widened and extended, and the research and development of the supercritical high-pressure diaphragm pump meeting the requirement of long-distance pipeline transportation become difficult problems to be solved by vast fluid machinery designers.

The three-cylinder single-action diaphragm pump with the traditional structure has the advantages that all key parts of the hydraulic end of the three-cylinder single-action diaphragm pump are made of cast alloy steel, the operation requirement of supercritical high-pressure slurry is difficult to meet from the structural strength, the service life of easily damaged spare parts (such as a valve cone, a valve seat and a diaphragm) in the hydraulic end of the diaphragm pump is difficult to guarantee, the operation safety of the whole machine is low, and casting defects and stress concentration at a certain position of each single part can become potential risks causing major safety accidents.

In addition, the specific arrangement form and the structural characteristics of each key part at the hydraulic end of the three-cylinder single-action diaphragm pump are also key factors influencing the field operation effect and the whole machine volume of the diaphragm pump, and for the hydraulic end of the supercritical high-pressure diaphragm pump, the arrangement form of each part not only needs to meet the basic requirement of solid-liquid two-phase fluid conveying, but also needs to comprehensively consider multiple factors such as the feasibility of the part processing and manufacturing process, the assembly sequence flow, the production cost and the like. Therefore, it is imperative to design and develop a fluid end suitable for supercritical high pressure fluid delivery diaphragm pumps.

Disclosure of Invention

The utility model aims to solve the problems and provides a diaphragm pump hydraulic end suitable for conveying supercritical high-pressure fluid.

In order to achieve the above purpose, the present invention adopts the following technical scheme, and the present invention comprises a base, wherein a diaphragm pump body is arranged on the base, and the present invention is characterized in that: the middle and two sides of the diaphragm pump body are respectively provided with a diaphragm chamber, the three diaphragm chambers form an isosceles triangle, and the middle diaphragm chamber is the vertex of the isosceles triangle; the diaphragm axes of the two diaphragm chambers are in the same straight line, and the diaphragm axis of the middle diaphragm chamber is perpendicular to the diaphragm axes of the two diaphragm chambers.

As a preferable scheme of the utility model, a feeding valve box connected with an inlet of the diaphragm chamber is arranged on the base; the top of the diaphragm pump body is provided with a discharge valve box communicated with the outlet of the diaphragm chamber; the feeding valve box is connected with the feeding compensation system through a feeding pipe, and the discharging valve box is connected with a discharging pipe.

Further, the discharge pipe is arranged between the middle diaphragm chamber and the two side diaphragm chambers; the discharge pipe is provided with a connecting flange corresponding to the discharge valve boxes of the diaphragm chambers on the two sides, and the connecting flange is connected with the discharge valve boxes of the diaphragm chambers on the two sides through bolt assemblies; the discharging valve box corresponding to the middle diaphragm chamber on the discharging pipe is arranged as a connecting block, a channel of the discharging pipe penetrates through the center of the connecting block, and the connecting block is connected with the discharging valve box of the middle diaphragm chamber through a connecting hole and a bolt assembly.

Furthermore, the discharging pipe is formed by welding a forged pipe body, a forged tee joint and a forged connecting block.

Furthermore, the diaphragm chamber and the feeding valve box, the diaphragm chamber and the discharging valve box, the feeding pipe and the feeding valve box, and the discharging pipe and the discharging valve box all adopt a tongue-and-groove type sealing structure.

Furthermore, the feeding compensation system is connected with the feeding pipes at two sides at an angle of 120 degrees, and the feeding pipes at two sides are respectively connected with the feeding valve boxes at two sides; the middle feeding pipes are arranged in the middle of the feeding pipes on the two sides of the feeding compensation system, and the middle feeding pipes are connected with a feeding valve box of a middle diaphragm chamber.

As another preferable scheme of the utility model, a cavity connected with the diaphragm chamber is arranged on the diaphragm pump body, and the cavity is connected with the power end of the diaphragm pump.

Furthermore, a tongue-and-groove type sealing structure with a concave-convex surface is arranged between the diaphragm chamber and the cavity.

In a third preferred embodiment of the present invention, the rod chamber of the diaphragm chamber is provided with a vent hole having a vent valve.

The utility model has the beneficial effects that: 1. the utility model can meet the long-distance pipeline transportation of the supercritical high-pressure (the maximum pressure can reach 35 MPa) solid-liquid two-phase fluid.

2. The utility model has reasonable structure and compact appearance of each part, and can reduce the tonnage and the appearance volume of the power end corresponding to the utility model to the maximum extent, thereby controlling the production and manufacturing cost of the whole machine.

3. Compared with the traditional diaphragm pump hydraulic end casting component, the forging process improves the mechanical strength of the material, avoids safety accidents caused by local stress concentration and casting defects, and improves the safety and stability of equipment operation.

4. The axes of the diaphragm chambers and the cavity at the two ends and the axes of the diaphragm chamber and the cavity at the middle end are arranged symmetrically in a T shape. The structure not only meets the requirement of the assembly space, but also simplifies the assembly process and improves the assembly precision.

5. The sealing form among all key parts in the utility model adopts tongue-and-groove type sealing with concave and convex surfaces. The wound gasket is arranged under the structural form of the sealing groove, so that the sealing effect under high pressure can be ensured to the maximum extent, and the operation risk caused by slurry leakage due to overhigh pressure of the inner cavity is avoided.

Drawings

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

Fig. 2 is a top view of the present invention.

Fig. 3 is a side view of the present invention.

Fig. 4 is a schematic view of the structure of the intermediate diaphragm chamber of the present invention.

FIG. 5 is a schematic view of the assembly of the two-sided chamber of the present invention.

Fig. 6 is a top view of fig. 5.

FIG. 7 is a schematic illustration of the structure of the tapping pipe according to the utility model.

FIG. 8 is a sectional view of a tapping pipe according to the utility model.

Figure 9 is a schematic view of the valve manifold assembly of the present invention.

In the attached drawing, 1 is a base, 2 is a diaphragm pump body, 3 is a middle diaphragm chamber, 4 is a feeding valve box, 5 is a discharging valve box, 6 is a feeding pipe, 7 is a feeding compensation system, 8 is a discharging pipe, 9 is a side diaphragm chamber, 10 is a nitrogen bag, 11 is a connecting flange, 12 is a connecting block, 13 is a connecting hole, 14 is a tongue-and-groove sealing structure, 15 is a cavity, 16 is an exhaust hole, and 17 is a jackscrew hole.

Detailed Description

The utility model comprises a base 1, a diaphragm pump body 2 is arranged on the base 1, and the utility model is characterized in that: the middle and two sides of the diaphragm pump body 2 are provided with a diaphragm chamber, the three diaphragm chambers form an isosceles triangle, and the middle diaphragm chamber is the vertex of the isosceles triangle; the diaphragm axes of the two diaphragm chambers 9 are in the same straight line, and the diaphragm axis of the middle diaphragm chamber 3 is perpendicular to the diaphragm axes of the two diaphragm chambers 9.

As a preferable scheme of the utility model, a feeding valve box 4 connected with an inlet of the diaphragm chamber is arranged on the base 1; the top of the diaphragm pump body 2 is provided with a discharge valve box 5 communicated with the outlet of the diaphragm chamber; the feeding valve box 4 is connected with a feeding compensation system 7 through a feeding pipe 6, and the discharging valve box 5 is connected with a discharging pipe 8.

The discharge pipe 8 is connected to a nitrogen bag 10.

Further, the discharge pipe 8 is arranged between the middle diaphragm chamber 3 and the two side diaphragm chambers 9; the discharge pipe 8 is provided with a connecting flange 11 corresponding to the discharge valve boxes 5 of the diaphragm chambers 9 at the two sides, and the connecting flange 11 is connected with the discharge valve boxes 5 of the diaphragm chambers 9 at the two sides through a bolt assembly; the discharge valve box 5 of the discharge pipe 8 corresponding to the intermediate diaphragm chamber 3 is provided as a connecting block 12, the passage of the discharge pipe 8 passes through the center of the connecting block 12, and the connecting block 12 is connected to the discharge valve box 5 of the intermediate diaphragm chamber 3 through a connecting hole 13 and a bolt assembly.

Furthermore, the discharging pipe 8 is formed by welding a forged pipe body, a forged tee joint and a forged connecting block 12.

Furthermore, the diaphragm chamber and the feeding valve box 4, the diaphragm chamber and the discharging valve box 5, the feeding pipe 6 and the feeding valve box 4, and the discharging pipe 8 and the discharging valve box 5 all adopt a tongue-and-groove type sealing structure 14.

Further, the feeding compensation system 7 is connected with the feeding pipes 6 on two sides at an angle of 120 degrees, and the feeding pipes 6 on two sides are respectively connected with the feeding valve boxes 4 on two sides; the middle feed pipe 6 is arranged between the feed pipes 6 at the two sides of the feed compensation system 7, and the middle feed pipe 6 is connected with the feed valve box 4 of the middle diaphragm chamber 3.

As another preferable scheme of the present invention, a cavity 15 connected with the diaphragm chamber is arranged on the diaphragm pump body 2, and the cavity 15 is connected with the power end of the diaphragm pump.

Furthermore, a tongue-and-groove type sealing structure 14 with a concave-convex surface is arranged between the diaphragm chamber and the cavity 15.

As a third preferred mode of the utility model, the rod cavity of the diaphragm chamber is provided with a vent hole 16 with a vent valve.

The feeding valve box 4 and the discharging valve box 5 both comprise valve box bodies and valve covers, and the valve box bodies and the valve covers are connected through bolts; the valve cover is provided with a jackscrew hole 17, and the valve box body is provided with a receiving top surface corresponding to the jackscrew hole 17.

In the utility model, 3 feeding valve boxes 4 are distributed in a V shape, so that the distribution mode of 3 feeding pipes 6 is the same as that of the feeding valve boxes 4.

According to the structure of the discharge pipe 8, the discharge valve box 5 and the discharge pipe 8 at the upper end of the diaphragm spacing chamber 3 are designed to be in rectangular distribution due to space limitation, the locking connection block 12 and the discharge valve box 5 are connected in a mode, and the specification of the sealing surface and the locking torque of the locking connection block are equivalent to circumferential flange connection. The structure not only meets the strength requirement of the discharge pipe 8 under the action of high-pressure fluid, but also skillfully avoids the dislocation of the discharge pipe 8 caused by different positions of the discharge valve box 5, thereby realizing the safety and stability in the discharge conveying process.

The valve cover and the valve box body are locked and assembled through four studs and nuts, and four jacking screw holes 17 and four connecting holes 13 are designed on the upper surface of the valve cover. The four jacking screw holes 17 play a role in facilitating ejection and disassembly of the valve cover; the four connecting holes 13 play a role in connecting the valve cover and the valve box body.

Compared with the parallel distribution mode of the diaphragm chambers in the hydraulic end of the traditional three-cylinder single-action diaphragm pump, the utility model has the difference that the axes of the diaphragms in the three diaphragm chambers are distributed in a T shape, and the left and right diaphragm chambers are symmetrically arranged, so that the structure reduces the center distance of the left, middle and right cavities 15 and the oil cylinder, and reduces the crank distance of the crankshaft at the power end and the volume of the box body at the power end matched with the utility model, thereby achieving the purposes of compact structure and reduction of production and manufacturing cost.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the utility model.

Claims

1. The utility model provides a novel three jars are diaphragm pump hydraulic end for nonoculture, includes base (1), is provided with the diaphragm pump body (2) on base (1), its characterized in that: the middle and two sides of the diaphragm pump body (2) are respectively provided with a diaphragm chamber, the three diaphragm chambers form an isosceles triangle, and the middle diaphragm chamber is the vertex of the isosceles triangle; the diaphragm axes of the two side diaphragm chambers (9) are in the same straight line, and the diaphragm axis of the middle diaphragm chamber (3) is vertical to the diaphragm axes of the two side diaphragm chambers (9).

2. The novel hydraulic end of a three-cylinder single-acting diaphragm pump according to claim 1, wherein: a feeding valve box (4) connected with an inlet of the diaphragm chamber is arranged on the base (1); the top of the diaphragm pump body (2) is provided with a discharge valve box (5) communicated with the outlet of the diaphragm chamber; the feeding valve box (4) is connected with the feeding compensation system (7) through the feeding pipe (6), and the discharging valve box (5) is connected with the discharging pipe (8).

3. The novel hydraulic end of a three-cylinder single-acting diaphragm pump according to claim 2, wherein: the discharge pipe (8) is arranged between the middle diaphragm chamber (3) and the diaphragm chambers (9) at the two sides; a connecting flange (11) is arranged on the discharge pipe (8) corresponding to the discharge valve boxes (5) of the diaphragm chambers (9) at the two sides, and the connecting flange (11) is connected with the discharge valve boxes (5) of the diaphragm chambers (9) at the two sides through a bolt assembly; the discharging valve box (5) corresponding to the middle diaphragm chamber (3) on the discharging pipe (8) is arranged to be a connecting block (12), a channel of the discharging pipe (8) penetrates through the center of the connecting block (12), and the connecting block (12) is connected with the discharging valve box (5) of the middle diaphragm chamber (3) through a connecting hole (13) and a bolt assembly.

4. A novel fluid end of a three-cylinder single acting diaphragm pump according to claim 3, wherein: the discharging pipe (8) is formed by welding a forging pipe body, a forging tee joint and a forging connecting block (12).

5. The novel hydraulic end of a three-cylinder single-acting diaphragm pump according to claim 2, wherein: the diaphragm chamber and the feeding valve box (4), the diaphragm chamber and the discharging valve box (5), and the feeding pipe (6) and the feeding valve box (4), and the discharging pipe (8) and the discharging valve box (5) all adopt a concave-convex tongue-and-groove type sealing structure (14).

6. The novel hydraulic end of a three-cylinder single-acting diaphragm pump according to claim 2, wherein: the feeding compensation system (7) is connected with the feeding pipes (6) at two sides at an angle of 120 degrees, and the feeding pipes (6) at two sides are respectively connected with the feeding valve boxes (4) at two sides; the middle of the feeding pipes (6) at the two sides of the feeding compensation system (7) is provided with a middle feeding pipe (6), and the middle feeding pipe (6) is connected with a feeding valve box (4) of the middle diaphragm chamber (3).

7. The novel hydraulic end of a three-cylinder single-acting diaphragm pump according to claim 1, wherein: and a cavity (15) connected with the diaphragm chamber is arranged on the diaphragm pump body (2), and the cavity (15) is connected with the power end of the diaphragm pump.

8. The new type of hydraulic end of a three cylinder single acting diaphragm pump according to claim 7, wherein: the rod chamber of the diaphragm chamber is provided with an exhaust hole (16) having an exhaust valve.

9. The new type of hydraulic end of a three cylinder single acting diaphragm pump according to claim 6, wherein: the feeding valve box (4) and the discharging valve box (5) both comprise valve box bodies and valve covers, and the valve box bodies are connected with the valve covers through bolts; the valve cover is provided with a jackscrew hole (17), and the valve box body is provided with a receiving top surface corresponding to the jackscrew hole (17).

10. The new type of hydraulic end of a three cylinder single acting diaphragm pump according to claim 5, wherein: the discharge pipe (8) is connected with a nitrogen bag (10).