CN220955996U

CN220955996U - Diaphragm type double-cavity high-pressure buffer

Info

Publication number: CN220955996U
Application number: CN202322560651.3U
Authority: CN
Inventors: 祝雪金; 徐卫华; 周财华; 杨圆; 张钦召
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-05-14
Anticipated expiration: 2033-09-20

Abstract

The utility model discloses a diaphragm type double-cavity high-pressure buffer, which comprises an inlet flange, an outlet flange and a cylinder body, wherein the cylinder body comprises a middle cylinder body, a left end socket and a right end socket which are respectively connected with two ends of the cylinder body, two ends of the middle cylinder body are respectively provided with a double-layer diaphragm, two sides of each double-layer diaphragm are provided with limiting devices, the cylinder body is also provided with a constant pressure device, the constant pressure device is communicated with a left cavity and a right cavity, so that the left cavity and the right cavity are at the same pressure.

Description

Diaphragm type double-cavity high-pressure buffer

Technical Field

The utility model relates to the field of buffers, in particular to a diaphragm type double-cavity high-pressure buffer.

Background

The pulse damper is a pressure container for eliminating liquid pressure pulsation or flow pulsation in a pipeline, is generally arranged at an outlet of a delivery pump, and has the functions of buffering pulses output by the pump, reducing the influence of the pulses on a system, stabilizing the pressure and flow of fluid, eliminating pipeline vibration, protecting downstream instruments and equipment, increasing the volumetric efficiency of the pump and the like.

The prior pulse damper is a double-diaphragm pulse damper like the one with the publication number of CN212361234U, and comprises an inlet flange and a middle cavity connected with the inlet flange, wherein the inlet flange is connected with the outer wall of the middle section of the middle cavity, the middle cavity is cylindrical, bowl-shaped partition boards inwards concave towards the middle section of the middle cavity are arranged at two ends of the middle cavity, and damping holes which are formed in opposite directions are formed in the bowl-shaped partition boards.

The prior art solutions described above have the following drawbacks: the whole is a single-air-chamber diaphragm pump, the volume of an internal buffer cavity is small, and the pressure bearing is relatively low.

There is a need for a pump that can withstand high pressures in a high flow medium pump and that is safe and stable.

Disclosure of Invention

(One) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a diaphragm type double-cavity high-pressure buffer which has the advantages of large volume of an internal buffer cavity, relatively high bearing pressure and low overall transformation cost.

(II) technical scheme

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

The utility model provides a diaphragm type double-chamber high-pressure buffer, includes import and export flange and barrel, the barrel includes middle barrel and connects left head and right head at barrel both ends respectively, middle barrel both ends all are equipped with double-deck diaphragm, and double-deck diaphragm separates into left cavity, medium chamber and right cavity with the barrel in proper order, be equipped with constant voltage device between left cavity and the right cavity, constant voltage device UNICOM left cavity and right cavity.

Preferably, the middle cylinder and the two double-layer diaphragms at two ends are surrounded to form a medium cavity, the double-layer diaphragm close to the left end socket and the left end socket are surrounded to form a left cavity, the double-layer diaphragm close to the right end socket and the right end socket are surrounded to form a right cavity, the constant pressure device comprises a connecting pipe, one end of the connecting pipe is communicated with the left cavity, and the other end of the connecting pipe is communicated with the right cavity.

Preferably, the connecting pipe is further provided with a pressure detection meter and an inflation device, and the inflation device comprises an inflation pipe and an inflation stop valve.

Preferably, the double-layer diaphragm is composed of a PTFE diaphragm and a rubber diaphragm, and a medium cavity is formed by the middle cylinder and two PTFE diaphragms at two ends.

Preferably, the two ends of the middle cylinder body are provided with accommodating grooves, the left end socket and the right end socket are respectively clamped in the corresponding accommodating grooves, and the middle cylinder body is used for fixing the left end socket or the right end socket through the end socket flange.

Preferably, in the cylinder, two sides of the double-layer diaphragm are provided with limiting devices, and each limiting device comprises a limiting plate and a limiting seat.

Preferably, at the connection of the left end socket and the middle cylinder: one of the limiting devices is fixed on the left sealing head, the other limiting device is fixed on the middle cylinder body, and the two limiting devices are symmetrically arranged by taking the double-layer diaphragm as a center.

Preferably, the limiting seat is a bolt on the detachable fixed cylinder body.

Preferably, in the non-operating state, the limiting plate and the double-layer diaphragm remain parallel.

(III) beneficial effects

Compared with the prior art, the utility model provides the diaphragm type double-cavity high-pressure buffer, which has the following beneficial effects:

1. According to the diaphragm type double-cavity high-pressure buffer, the left cavity and the right cavity are arranged, so that the whole volume of buffer gas is doubled, the compression strength is doubled, the left cavity and the right cavity are communicated through the connecting pipe, the air pressure in the two cavities is ensured to be equal, the problems that the pressure is different, the stress of the diaphragm is different, the whole deformation degree is different and the service life is different due to the fact that the pressure is different due to the fact that the two cavities are independently controlled are effectively avoided;

2. According to the diaphragm type double-cavity high-pressure buffer, two chambers can be guaranteed to be at the same pressure level only by arranging one constant-pressure device on the connecting pipe, and the left chamber and the right chamber are controlled respectively without arranging two constant-pressure devices; on the basis that the whole volume of buffer gas is doubled, only one pressure detection meter, an inflation tube and an inflation stop valve are required to be arranged through one set of constant pressure device, when the pressure in the cavity is insufficient, the whole pressure can be adjusted only by operating to inflate once, the equipment structure is reduced as a whole, and the equipment cost is also reduced.

Drawings

FIG. 1 is a perspective view of a diaphragm type dual chamber high pressure buffer of the present utility model;

FIG. 2 is a front view of a diaphragm type dual chamber high pressure buffer of the present utility model;

FIG. 3 is a schematic cross-sectional view of a cartridge in a diaphragm-type dual chamber high pressure buffer of the present utility model;

FIG. 4 is an enlarged view of portion A of FIG. 3 in accordance with the present utility model;

FIG. 5 is a schematic diagram illustrating the assembly of a diaphragm type dual chamber high pressure buffer according to the present utility model;

FIG. 6 is a schematic illustration of a specific construction of a bilayer separator of the present utility model;

In the figure: the device comprises an inlet and outlet flange 1, a medium cavity 100, a left cavity 200, a right cavity 300, a cylinder 2, a cylinder 21, a left seal head 22, a right seal head 23, a double-layer diaphragm 3, a PTFE diaphragm 31, a rubber diaphragm 32, a constant pressure device 4, a connecting pipe 41, a pressure detection meter 42, an inflation stop valve 43, an inflation pipe 44, a limiting device 5, a limiting plate 51 and a limiting seat 52.

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.

Referring to fig. 1-6, a diaphragm type dual-cavity high-pressure buffer comprises an inlet flange 1 and an outlet flange 1 and a cylinder 2, wherein the diaphragm type dual-cavity high-pressure buffer is arranged at an outlet of a diaphragm delivery pump, the inlet flange 1 is connected with a delivery pipeline, the cylinder 2 has the main functions of buffering pulses output by the pump, reducing the influence of the pulses on a system, stabilizing the pressure and flow of fluid, eliminating the vibration of the pipeline, protecting downstream instruments and equipment, increasing the volumetric efficiency of the pump and the like.

As shown in fig. 2-5: the cylinder 2 comprises a middle cylinder 21 and a left sealing head 22 and a right sealing head 23 which are respectively connected with two ends of the cylinder 21, wherein two double-layer diaphragms 3 are arranged at two ends of the middle cylinder 21, a medium cavity 100 is formed by surrounding the middle cylinder 21 and the two diaphragms at two ends, a left cavity 200 is formed by surrounding the double-layer diaphragms 3 close to the left sealing head 22 and the left sealing head 22, and a right cavity 300 is formed by surrounding the diaphragms close to the right sealing head 23 and the right sealing head 23;

The cylinder body 2 is also provided with a constant pressure device 4, and the constant pressure device 4 is communicated with the left chamber 200 and the right chamber 300, so that the left chamber 200 and the right chamber 300 are under the same pressure.

As a further improvement of the present utility model, the constant pressure device 4 includes a connection pipe 41, one end of the connection pipe 41 communicates with the left chamber 200, and the other end of the connection pipe 41 communicates with the right chamber 300.

As a further improvement of the present utility model, the connecting pipe 41 is further provided with a pressure detecting gauge 42 and an inflating device, which includes an inflating pipe 44 and an inflating stop valve 43.

As a further improvement of the utility model, two ends of the middle cylinder 21 are provided with accommodating grooves 210, the left end enclosure 22 and the right end enclosure 23 are respectively clamped in the corresponding accommodating grooves 210, and the middle cylinder 21 fixes the left end enclosure 22 and the right end enclosure 23 through end enclosure flanges. According to the diaphragm type double-cavity high-pressure buffer, the whole volume of buffer gas is doubled by arranging the left cavity and the right cavity, the compression strength is doubled, and the diaphragm type double-cavity high-pressure buffer is suitable for diaphragm pumps with large-flow media.

As a further improvement of the utility model, two sides of each double-layer diaphragm 3 are provided with limiting devices 5, and each limiting device 5 is fixed on the cylinder 2.

As a further development of the utility model, at the junction of the left head 22 and the intermediate cylinder 21: one of the limiting devices 5 is fixed on the left sealing head 22, the other limiting device 5 is fixed on the middle cylinder 21, and the two limiting devices 5 are symmetrically arranged with the double-layer diaphragm 3 as a center. Through setting up stop device in the both sides of diaphragm, the position of restriction diaphragm prevents that the diaphragm from keeping tensile extreme position for a long time under high pressure, and limiting plate and spring can provide reverse elasticity, reduce the medium pressure that the diaphragm receives, increase the life of medium diaphragm.

As a further improvement of the utility model, each limiting device 5 comprises a limiting plate 51 and a limiting seat 52, in order to enable the limiting seat 52 to be detachably fixed on the cylinder 2, the limiting seat adopts bolts, the distance between the limiting plate 51 and the double-layer diaphragm 3 is 80% of the limit expansion distance of the diaphragm, and when the double-layer diaphragm 3 is about to reach a mechanical limit position, the limiting plate 51 provides reverse acting force to bear impact pressure in a pipeline, so that the bearing pressure of the double-layer diaphragm 3 is reduced, and deformation is reduced.

As shown in fig. 6: as a further improvement of the utility model, the double-layer diaphragm 3 consists of a PTFE diaphragm 31 and a rubber diaphragm 32, the middle cylinder 21 and the two PTFE diaphragms at the two ends are surrounded to form a medium cavity 100, and the diaphragm structure is formed by adding a layer of rubber diaphragm on the basis of the traditional single-layer PTFE diaphragm, so that the overall toughness of the diaphragm is improved, and the service life is longer.

Working principle: according to the diaphragm type double-cavity high-pressure buffer, the whole volume of buffer gas is doubled by arranging the left cavity 200 and the right cavity 300, and the compression strength is doubled, so that the diaphragm type double-cavity high-pressure buffer is suitable for a diaphragm pump of a large-flow medium; the left chamber 200 and the right chamber 300 are communicated through the connecting pipe 41, so that the air pressure in the two chambers is ensured to be equal, and the problems that the pressure is different, the stress of the double-layer diaphragm 3 is different, the whole deformation degree is different, and the service life is different due to the fact that the pressure is different when the two chambers are independently controlled are effectively avoided;

The constant pressure device 4 is arranged on the connecting pipe 41 to ensure that two chambers are at the same pressure level, namely, only one pressure detection meter 42, an air charging pipe 44 and an air charging stop valve 43 are needed to be arranged, when the pressure in the chamber is insufficient, the whole pressure can be adjusted by only operating to charge air once, the equipment structure is reduced as a whole, the equipment cost is reduced, and the two constant pressure devices are not needed to be arranged to control the left chamber 200 and the right chamber 300 respectively;

Limiting devices 5 are arranged on two sides of the diaphragm to limit the position of the double-layer diaphragm, so that the double-layer diaphragm is prevented from keeping a stretching limit position for a long time under high pressure, the pressure of fluid media borne by the double-layer diaphragm 3 is reduced, and the service life of the media diaphragm is prolonged;

The dielectric diaphragm adopts a two-layer structure, and a layer of rubber diaphragm 32 is added on the basis of the traditional single-layer PTFE diaphragm 31, so that the toughness of the diaphragm is improved, and the service life is longer.

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

1. The utility model provides a diaphragm type double-chamber high-pressure buffer, includes access flange (1) and barrel (2), its characterized in that: barrel (2) are including middle barrel (21) and connect left head (22) and right head (23) at barrel (21) both ends respectively, middle barrel (21) both ends all are equipped with double-deck diaphragm (3), and double-deck diaphragm (3) separate barrel (2) into left cavity (200), medium chamber (100) and right cavity (300) in proper order, be equipped with constant voltage device (4) between left cavity (200) and right cavity (300), constant voltage device (4) UNICOM left cavity (200) and right cavity (300).

2. The diaphragm type double-chamber high pressure buffer according to claim 1, wherein: the medium cavity (100) is encircled to two double-deck diaphragm (3) at middle barrel (21) and both ends, double-deck diaphragm (3) that are close to left head (22) with left head (22) are encircled and are become left cavity (200), double-deck diaphragm (3) that are close to right head (23) with right head (23) are encircled and are become right cavity (300), constant voltage device (4) include connecting pipe (41), left cavity (200) of one end UNICOM of connecting pipe (41), right cavity (300) are UNICOM to the other end of connecting pipe (41).

3. The diaphragm type double-chamber high pressure buffer according to claim 2, wherein: the connecting pipe (41) is also provided with a pressure detection meter (42) and an inflation device, and the inflation device comprises an inflation pipe (44) and an inflation stop valve (43).

4. The diaphragm type double-chamber high pressure buffer according to claim 2, wherein: the double-layer diaphragm (3) consists of a PTFE diaphragm (31) and a rubber diaphragm (32), and a medium cavity (100) is formed by the middle cylinder (21) and the two PTFE diaphragms (31) at the two ends.

5. The diaphragm type double chamber high pressure buffer of claim 4, wherein: the two ends of the middle cylinder body (21) are provided with accommodating grooves (210), the left end socket (22) and the right end socket (23) are respectively clamped in the corresponding accommodating grooves (210), and the middle cylinder body (21) is used for fixing the left end socket (22) or the right end socket (23) through an end socket flange.

6. The diaphragm type double-chamber high pressure buffer according to claim 1, wherein: in the cylinder body (2), two sides of the double-layer diaphragm (3) are provided with limiting devices (5), and each limiting device (5) comprises a limiting plate (51) and a limiting seat (52).

7. The diaphragm type double-chamber high-pressure buffer according to claim 6, wherein at the connection of the left end cap (22) and the middle cylinder (21): one of the limiting devices (5) is fixed on the left end socket (22), the other limiting device (5) is fixed on the middle cylinder (21), and the two limiting devices (5) are symmetrically arranged by taking the double-layer diaphragm (3) as a center.

8. The diaphragm type double chamber high pressure buffer according to claim 6, wherein: and the limiting seat (52) is arranged on the detachable fixed cylinder body (2), and the limiting seat (52) is a bolt.

9. The diaphragm type double chamber high pressure buffer of claim 7, wherein: in the non-working state, the limiting plate (51) and the double-layer diaphragm (3) are kept parallel.