CN218914173U

CN218914173U - Pulsation damper with diaphragm

Info

Publication number: CN218914173U
Application number: CN202220371889.4U
Authority: CN
Inventors: 周财华; 徐卫华; 姜燕飞; 周良
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2023-04-25
Anticipated expiration: 2032-02-23

Abstract

The utility model relates to a pulsation damper with a diaphragm, which comprises a first shell and a second shell, wherein a first cavity is arranged in the first shell, a second cavity is arranged in the second shell, a diaphragm sheet for isolating the first cavity from the second cavity is arranged between the first shell and the second shell, a first limiting block is arranged in the first shell, the first limiting block is provided with a first through hole for communicating the first cavity, a first protection film device is arranged on the first limiting block, a first reset spring is arranged between the first limiting block and the first protection film device, a second limiting block is arranged in the second shell, a second through hole for communicating the second cavity is arranged on the second limiting block, a second protection film device is arranged between the second limiting block and the second protection film device, and the pulsation damper has good high-pressure resistance.

Description

Pulsation damper with diaphragm

[ field of technology ]

The utility model relates to a pulsation damper with a diaphragm, and belongs to the technical field of fluid equipment.

[ background Art ]

Pulsation dampers are accessory devices widely used in pipeline hydraulic systems in industries such as petrochemical industry, environmental protection, chemical industry, sewage treatment and the like, and are generally used for reducing the unevenness of discharge flow of reciprocating pumps (such as reciprocating pumps and metering pumps) and reducing hydraulic impact (such as water hammer effect) of the pipeline systems.

Currently, pulsation dampers are classified into three types of gas-liquid contact type (or direct contact type), air bag type and diaphragm type according to structural forms. When the gas-liquid contact type structure is used, the pipeline medium is in direct contact with gas (nitrogen or air) in the damper cavity, so that the gas-liquid contact type structure is not suitable for the working condition of dangerous mediums; the air bag type structure can separate high-risk media from gas through the built-in capsule, can play a role in isolation and protection, is limited by the restriction of capsule materials, and cannot be used under the working condition of high-temperature media (such as 170 ℃); the diaphragm type structure commonly used in the market is often not satisfied under the high pressure working condition due to the influence of the sealing performance.

[ utility model ]

The utility model aims to provide a pulsation damper with a diaphragm, which has better high-pressure resistance.

The technical problems are solved, and the utility model adopts the following technical scheme:

the utility model provides a pulsation damper with diaphragm, includes first casing and second casing, be equipped with first cavity and second cavity respectively between first casing and the second casing, be equipped with between first casing and the second casing be used for keeping apart the diaphragm of first cavity and second cavity, be equipped with first stopper in the first casing, first stopper is equipped with a plurality of first through-holes that are used for the intercommunication first cavity, first stopper is equipped with first protection film device, be equipped with first reset spring between first stopper and the first protection film device, first protection film device includes first protection film board, first through-hole is in the scope of first protection film board, works as first protection film device compression is as when first stopper contacts, first protection film board shelters from first through-hole, be equipped with the second stopper in the second casing, the second stopper is equipped with a plurality of second through-holes that are used for the intercommunication second cavity, the second stopper is equipped with second protection film device, second protection film device includes the second protection film board, second protection film device is in when second protection film board, second protection film board is equipped with second protection film device, second protection film board is in when second protection film device compression is equipped with second protection film board, second protection film board bottom is in the second protection film device.

The beneficial effects of the utility model are as follows:

when the diaphragm is compressed to the bottom by the first diaphragm, the first diaphragm protection plate shields the first through hole, so that the diaphragm is isolated from the first chamber, the deformation of the diaphragm can be limited by the first limiting block, the possibility of breakage of the diaphragm due to high pressure is reduced, the service life of the diaphragm is prolonged, and meanwhile, the high pressure resistance of the diaphragm can be improved.

Preferably, the first protection film device further comprises a first connecting rod, the first limiting block is provided with a first slideway for the first connecting rod to slide, the end part of the first connecting rod is provided with a first limiting nut for limiting the first protection film device to be separated from the first slideway, and the first reset spring is sleeved on the first connecting rod.

Preferably, the second protection film device further comprises a second connecting rod, the second limiting block is provided with a second slideway for the second connecting rod to slide, the end part of the second connecting rod is provided with a second limiting nut for limiting the second protection film device to be separated from the second slideway, and the second reset spring is sleeved on the second connecting rod.

Preferably, a first annular block is arranged on the outer side wall of the first shell, the outer side wall of the second shell is provided with a plurality of corresponding connecting holes, connecting screws are arranged in the connecting holes, and the first shell and the second shell are fixedly connected through the connecting screws.

Preferably, the first limiting block is integral with the first annular block.

Preferably, the second limiting block is integral with the second annular block.

Preferably, the surface of the first limiting block facing the diaphragm is arc-shaped and is concave inwards.

Preferably, the surface of the second limiting block facing the diaphragm is arc-shaped and is concave inwards.

Preferably, the connecting piece end is provided with a connecting flange for connection.

Preferably, the first housing is provided with an inflation assembly in communication with the first chamber.

Other features and advantages of the present utility model will be disclosed in the following detailed description of the utility model and the accompanying drawings.

[ description of the drawings ]

The utility model is further described with reference to the accompanying drawings:

FIG. 1 is a cross-sectional view of embodiment 1 of the present utility model;

fig. 2 is a schematic overall structure of embodiment 1 of the present utility model.

Reference numerals: the device comprises a first shell, a first limiting block 11, a first protective film plate 111, a first return spring 112, a first limiting nut 113, a second shell 2, a second limiting block 21, a second protective film plate 211, a second return spring 212, a second limiting nut 213, a diaphragm 3, a connecting pipe 4, a connecting flange 5, an inflating component 6 and a connecting screw 7.

[ detailed description ] of the utility model

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1:

as shown in fig. 1 and 2, this embodiment shows a pulsation damper with a diaphragm, including a first housing 1 and a second housing 2, a first chamber is provided in the first housing 1, a second chamber is provided in the second housing 2, a diaphragm 3 for isolating the first chamber and the second chamber is provided between the first housing 1 and the second housing 2, an inflation assembly 6 communicating with the first chamber is provided on the first housing 1, a connection pipe 4 is provided at the bottom of the second housing 2, a first limiting block 11 is provided in the first housing 1, a first through hole for communicating with the first chamber is provided in the first limiting block 11, a first protection film device is provided in the first limiting block 11, a first return spring 112 is provided between the first limiting block 11 and the first protection film device, a second limiting block 21 is provided in the second housing 2, a second through hole for communicating with the second chamber is provided in the second limiting block 21, and a second return spring 212 is provided between the second limiting block 21 and the second protection film device.

In addition, the first film protection device includes a first film protection plate 111, the first through hole is in the range of the first film protection plate 111, when the first film protection device is compressed to be in contact with the first limiting block 11, the first film protection plate 111 shields the first through hole, the second film protection device includes a second film protection plate 211, the second through hole is in the range of the second film protection plate 211, and when the second film protection device is compressed to be in contact with the second limiting block 21, the second film protection plate 211 shields the second through hole.

Before the work, the inflation component 6 fills certain quantity inert gas into the first cavity, produces the precompression, makes diaphragm 3 downwards outstanding under the effect of gaseous pressure, and at the during operation, liquid medium gets into the second cavity through takeover 4, and when liquid medium intake was big enough, the pressure of second cavity was greater than the gaseous pressure of first cavity, makes diaphragm 3 rise upwards, works as diaphragm 3 and first protection membrane device contact, diaphragm 3 can produce thrust to first protection membrane device and make first reset spring 112 compress, in the effect of first reset spring 112, first protection membrane device produces thrust to diaphragm 3 to alleviate the deformation trend of diaphragm 3, when the liquid medium in the second cavity is too much, the pressure in the second cavity is too big, diaphragm 3 compresses first reset spring 112 to the end, first reset spring 112 contacts with first stopper 11, at this moment first protection membrane plate 111 first through-hole makes diaphragm 3 keep apart with first cavity, the diaphragm 3 can be attached to the diaphragm 11, thereby can reduce the deformation trend of diaphragm 3 because of the high pressure of the stopper is applied to first diaphragm 11, and the high pressure resistance of implementing the high pressure case can reduce the life-span of the high pressure diaphragm 3.

Likewise, when the flow rate of the liquid medium is insufficient, the diaphragm 3 protrudes downward under the action of the gas pressure, and the operation process of the second protection film device is similar to that of the first protection film device, which is not described in detail herein, so that the liquid medium in the second chamber is extruded during the downward deformation of the diaphragm 3, thereby compensating for the insufficient flow rate of the liquid medium and achieving the purpose of pulsation balancing.

Regarding the diaphragm 3, in this embodiment, the diaphragm 3 is made of a high-performance corrosion-resistant and high-temperature-resistant material, so that the diaphragm 3 can be used stably and reliably under high-temperature and corrosive conditions.

Regarding the first film protecting device and the second film protecting device, in this embodiment, the first film protecting device includes a first film protecting plate 111 and an upper connecting rod, the first limiting block 11 is provided with an upper slideway for sliding the upper connecting rod, the end of the upper connecting rod is provided with a first limiting nut 113 for limiting the first film protecting device to be separated from the upper slideway, the first restoring spring 112 is sleeved on the upper connecting rod, when the first film protecting plate 111 is extruded, the upper connecting rod slides upwards along the upper slideway, the first restoring spring 112 compresses, when the first restoring spring 112 compresses to the bottom, the first film protecting plate 111 contacts with the first limiting block 11, and the first film protecting plate 111 shields the first through hole; when the diaphragm 3 leaves the first protection plate 111, the first return spring 112 rebounds to enable the first protection plate 111 and the upper connecting rod to slide downwards, and when the first protection plate slides to the bottom, the first limit nut 113 at the upper end of the connecting rod is in contact with the first limit block 11, and the first limit nut 113 interacts with the first limit block 11 to limit the upper connecting rod to be separated from the first limit block 11. In addition, the second film protection device comprises a second film protection plate 211, a lower connecting rod and a second limit nut 213 arranged at one end of the lower connecting rod, and the operation principle of the second film protection device is the same as that of the first film protection device.

Regarding the first stopper 11 and the second stopper 21, the surface of first stopper 11 towards diaphragm 3 is arc and inwards sunken, the surface of second stopper 21 towards diaphragm 3 is arc and inwards sunken, the surface shape of first stopper 11 and second stopper 21 with the shape after the diaphragm 3 warp accords with, makes diaphragm 3 can with the better laminating of first stopper 11 and second stopper 21, can avoid the diaphragm 3 receives the damage when contacting with first stopper 11 or second stopper 21, in this embodiment first stopper 11 and second stopper 21 play the guard action to diaphragm 3, can further improve the life of diaphragm 3.

In addition be equipped with first annular block on the 1 lateral wall of first casing, first stopper 11 with first annular block is an integer, 2 lateral walls of second casing be equipped with the second annular block, second stopper 21 with the second annular block is an integer, first annular block and a plurality of corresponding connecting holes that are equipped with of second annular block, install connecting screw 7 in the connecting hole, first casing 1 and second casing 2 pass through connecting screw 7 fixed connection makes this embodiment have better leakproofness and structural stability through above-mentioned structure.

Regarding the connection pipe 4, in this embodiment, a connection flange 5 for connection is provided at an end of the connection pipe 4, and the connection flange 5 may be connected with a system pipeline by a screw, so as to improve connection stability between the embodiment and the system pipeline.

While the utility model has been described in terms of embodiments, it will be appreciated by those skilled in the art that the utility model is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.

Claims

1. A pulsation damper with a diaphragm comprising a first housing and a second housing, characterized in that: the first casing and the second casing are respectively provided with a first cavity and a second cavity, a diaphragm sheet used for isolating the first cavity and the second cavity is arranged between the first casing and the second casing, a first limiting block is arranged in the first casing and is provided with a plurality of first through holes used for communicating the first cavity, the first limiting block is provided with a first protection film device, a first reset spring is arranged between the first limiting block and the first protection film device, the first protection film device comprises a first protection film plate, the first through holes are in the range of the first protection film plate, when the first protection film device is compressed to the first limiting block, the first protection film plate shields the first through holes, a second limiting block is arranged in the second casing and is provided with a plurality of second through holes used for communicating the second cavity, the second protection film device comprises a second protection film plate, the second through holes are in the range of the second protection film plate, and when the second protection film device is compressed to the second protection film plate, the second limiting block is arranged between the second protection film device and the second casing, and the second protection film device is in contact with the second protection film device.

2. The pulsation damper with membrane according to claim 1, characterized in that: the first protection film device further comprises a first connecting rod, the first limiting block is provided with a first slide way for the first connecting rod to slide, the end part of the first connecting rod is provided with a first limiting nut for limiting the first protection film device to be separated from the first slide way, and the first reset spring is sleeved on the first connecting rod.

3. The pulsation damper with membrane according to claim 1, characterized in that: the second protection film device further comprises a second connecting rod, a second slide way for the second connecting rod to slide is arranged on the second limiting block, a second limiting nut used for limiting the second protection film device to be separated from the second slide way is arranged at the end portion of the second connecting rod, and a second reset spring is sleeved on the second connecting rod.

4. The pulsation damper with membrane according to claim 1, characterized in that: the first shell is characterized in that a first annular block is arranged on the outer side wall of the first shell, a second annular block is arranged on the outer side wall of the second shell, a plurality of corresponding connecting holes are formed in the first annular block and the second annular block, connecting screws are arranged in the connecting holes, and the first shell and the second shell are fixedly connected through the connecting screws.

5. The pulsation damper with membrane according to claim 4, wherein: the first limiting block and the first annular block are integrated.

6. The pulsation damper with membrane according to claim 4, wherein: the second limiting block and the second annular block are integrated.

7. The pulsation damper with membrane according to claim 1, characterized in that: the first limiting block is arc-shaped and inwards concave towards the surface of the diaphragm.

8. The pulsation damper with membrane according to claim 1, characterized in that: the surface of the second limiting block facing the diaphragm is arc-shaped and inwards concave.

9. The pulsation damper with membrane according to claim 1, characterized in that: the end part of the connecting pipe is provided with a connecting flange for connection.

10. The pulsation damper with membrane according to claim 1, characterized in that: the first shell is provided with an inflation assembly communicated with the first cavity.