CN212178234U

CN212178234U - Diaphragm type pulsation damper

Info

Publication number: CN212178234U
Application number: CN202020611872.2U
Authority: CN
Inventors: 胡佩强
Original assignee: Wenzhou Lige Fluid System Co ltd
Current assignee: Wenzhou Lige Fluid System Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-12-18
Anticipated expiration: 2030-04-21

Abstract

The utility model provides a diaphragm formula pulsation damper, including the last casing of buckleing each other and casing down, go up the casing and be equipped with the diaphragm down between the casing, go up the cavity of constituteing between casing and the diaphragm, constitute cavity down between casing and the diaphragm down, upward be equipped with the manometer on the casing and pressurize mouthful, its characterized in that: the lower casing bottom is equipped with the import with cavity intercommunication down, its surface of cavity bottom is equipped with a plurality of along its circumference direction equipartition settings down, is the drainage portion of epirelief or recessed setting for cavity inner wall down. The utility model has the advantages of the reaction is sensitive, can effectively prevent to hold back breath, better absorbs unnecessary pulsation, reduces vibrations, level and smooth pipeline pressure, the balanced velocity of flow.

Description

Diaphragm type pulsation damper

Technical Field

The utility model relates to a pulsation damper field, concretely relates to diaphragm formula pulsation damper.

Background

The pulsation damper is a common element for eliminating pipeline pulsation, is used for smoothing pipeline pulsation and water hammer phenomenon of a system caused by volumetric pumps such as a metering pump, a pneumatic diaphragm pump and the like, and is characterized in that gas is isolated from liquid in a pipeline by a corrosion-resistant diaphragm, and the pipeline pulsation is smoothed by the change of the volume of an air chamber, so that the harm of the water hammer to the system is reduced, the peak value of flow velocity fluctuation is reduced, the pipeline and a valve joint are protected from being impacted by pressure fluctuation, and the energy consumption of the system is reduced.

The existing diaphragm type pulsation buffer is in inverse proportion to the volume of gas and the pressure of the gas according to the Boyle's law, smoothes pipeline pulses by changing the volume of the gas, has a sinusoidal system effect on the flow velocity, and is used in the process of wave crest: the air chamber volume diminishes, and the pulsation damper absorbs unnecessary flow liquid, during the trough: the air chamber volume grow, the liquid of release storage to reach smooth pulsating effect, nevertheless because the diaphragm can hug closely buffer cavity inner wall at the during operation, consequently can cause liquid to fill rapidly or discharge rapidly because of hugging closely too between diaphragm and the buffer cavity inner wall when receiving the pulsation, cause to hold breath and influence its reaction rate.

SUMMERY OF THE UTILITY MODEL

Based on the problem, the utility model aims to provide a reaction is sensitive, can effectively prevent to hold back breath, better absorbs unnecessary pulsation, reduces vibrations, level and smooth pipeline pressure, the diaphragm formula pulsation buffer of the balanced velocity of flow.

Aiming at the problems, the following technical scheme is provided: the utility model provides a diaphragm type pulsation damper, includes casing and lower casing of buckleing each other, go up and be equipped with the diaphragm between casing and the lower casing, go up and constitute the cavity between casing and the diaphragm, constitute down the cavity between casing and the diaphragm down, upward be equipped with the manometer on the casing and pressurize the mouth, casing bottom is equipped with the import with cavity intercommunication down, its surface in cavity bottom is equipped with a plurality of along its circumference direction equipartitions setting down, is the drainage portion of epirelief or recessed setting for cavity inner wall down.

In the structure, the drainage part is used for separating the diaphragm from the inner wall of the lower cavity, so that the diaphragm can rapidly introduce pulsating liquid between the diaphragm and the inner wall of the lower cavity in the buffer operation process, and the diaphragm can rapidly move towards the upper shell; or when the pulsating liquid is discharged, the drainage part can quickly drain the liquid between the diaphragm and the inner wall of the lower cavity, so that the air-holding effect is avoided, the redundant pulsation is better absorbed, the vibration is reduced, the pipeline pressure is smoothed, and the flow speed is balanced.

The utility model discloses further set up to, be equipped with the bearing plate between import and the lower cavity, be equipped with a plurality of through-holes of seting up to leading to on the bearing plate.

In the structure, the pressure bearing plate is used for blocking the diaphragm, the diaphragm is prevented from being extruded into the inlet under the pressure of the upper cavity, and the through hole can ensure effective communication between the inlet and the lower cavity.

The utility model is further arranged in that the outer wall of one end of the upper shell facing the lower shell is provided with an upper pressure ring, and the outer wall of one end of the lower shell facing the upper shell is provided with a lower pressure ring; the upper flange pressing plate and the lower flange pressing plate are fastened through bolts to tightly press the upper pressing ring and the lower pressing ring mutually.

In the structure, the disassembly and assembly are convenient, the manufacturing cost of the upper shell and the lower shell is reduced, the production efficiency is improved, the butt joint sealing performance of the upper shell and the lower shell can be improved, and the local stress concentration is reduced.

The utility model discloses further set up to, the one side of going up casing orientation down casing is equipped with the up end slot, the one side of casing is equipped with down the terminal surface slot down in the casing orientation down, the diaphragm outer fringe is equipped with the round sealing ring, the sealing ring presss from both sides between up end slot and lower terminal surface slot.

In the structure, the upper end surface groove and the lower end surface groove can improve the fixing effect on the diaphragm while being matched and sealed with the sealing ring.

The utility model discloses further set up as, it is protruding that the diaphragm middle part is the import direction of the down cavity of bowl shape.

In the structure, the diaphragm is close to the inlet direction by injecting positive pressure into the upper cavity before operation, so that the diaphragm can be pushed back to absorb the pulsation of the pipeline when the pipeline has pressure fluctuation.

The utility model discloses further set up to, drainage portion rises from the import position along cavity inner wall up cavity direction setting of resorption.

In the structure, the drainage part can guide the liquid entering the lower cavity to the space between the whole diaphragm and the inner wall of the lower cavity.

The utility model discloses further set up as, drainage portion prefers to be the sand grip of epirelief.

The utility model has the advantages that: the drainage part is used for separating the diaphragm from the inner wall of the lower cavity, so that the diaphragm can rapidly introduce pulsating liquid between the diaphragm and the inner wall of the lower cavity in the buffer operation process, and the diaphragm can rapidly move towards the upper shell; or when the pulsating liquid is discharged, the drainage part can quickly drain the liquid between the diaphragm and the inner wall of the lower cavity, so that the air-holding effect is avoided, the redundant pulsation is better absorbed, the vibration is reduced, the pipeline pressure is smoothed, and the flow speed is balanced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is the structural schematic diagram of the upper casing and the lower casing of the present invention.

Fig. 3 is a schematic diagram of the diaphragm full-section structure of the present invention.

Fig. 4 is a schematic diagram of the explosion structure of the present invention.

The reference numbers in the figures mean: 10-an upper shell; 11-an upper cavity; 12-pressure gauge; 13-a pressurizing port; 14-pressing a ring; 15-upper flange pressing plate; 16-upper end face groove; 20-a lower shell; 21-lower cavity; 22-an inlet; 23-a drainage part; 24-a pressure bearing plate; 241-a through hole; 25-pressing a ring; 26-lower flange press plate; 27-lower end face groove; 30-a membrane; 31-sealing ring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 to 4, a diaphragm type pulsation damper as shown in fig. 1 to 4 includes an upper casing 10 and a lower casing 20 which are buckled with each other, a diaphragm 30 is arranged between the upper casing 10 and the lower casing 20, an upper cavity 11 is formed between the upper casing 10 and the diaphragm 30, a lower cavity 21 is formed between the lower casing 20 and the diaphragm 30, a pressure gauge 12 and a pressurizing port 13 are arranged on the upper casing 10, an inlet 22 communicated with the lower cavity 21 is arranged at the bottom of the lower casing 20, a plurality of drainage portions are uniformly distributed along the circumferential direction of the lower cavity 21 on the surface of the bottom of the lower cavity 21, and the drainage portions 23 are arranged upwards or downwards and are arranged upwards relative to the inner wall of the lower cavity 21.

In the structure, the drainage part 23 is used for separating the diaphragm 30 from the inner wall of the lower cavity 21, so that the diaphragm 30 can rapidly introduce pulsating liquid between the diaphragm 30 and the inner wall of the lower cavity 21 in the buffer operation process, and the diaphragm 30 can rapidly move towards the upper shell 10; or when the pulsating liquid is discharged, the drainage part 23 can quickly drain the liquid between the diaphragm 30 and the inner wall of the lower cavity 21, so that the air-out effect is avoided, the redundant pulsation is better absorbed, the vibration is reduced, the pipeline pressure is smoothed, and the flow speed is balanced.

In this embodiment, a pressure-bearing plate 24 is disposed between the inlet 22 and the lower cavity 21, and a plurality of pairs of through holes 241 are disposed on the pressure-bearing plate 24.

In the above structure, the pressure plate 24 is used to block the diaphragm 30, so as to prevent the diaphragm 30 from being squeezed into the inlet 22 under the pressure of the upper cavity 11, and the through hole can ensure effective communication between the inlet 22 and the lower cavity 21.

In this embodiment, an upper press ring 14 is arranged on the outer wall of one end, facing the lower casing 20, of the upper casing 10, and a lower press ring 25 is arranged on the outer wall of one end, facing the upper casing 10, of the lower casing 20; the clamping device further comprises an upper flange pressing plate 15 sleeved on the upper shell 10 and a lower flange pressing plate 26 sleeved on the lower shell 20, wherein the upper flange pressing plate 15 and the lower flange pressing plate 26 are fastened through bolts to press the upper pressing ring 14 and the lower pressing ring 25 mutually.

Among the above-mentioned structure, make things convenient for the dismouting, be favorable to reducing the manufacturing cost of last casing 10 and casing 20 down, improve production efficiency, can improve the butt joint leakproofness of last casing 10 and casing 20 down simultaneously, reduce local stress concentration.

In this embodiment, an upper end surface groove 16 is disposed on one surface of the upper casing 10 facing the lower casing 20, a lower end surface groove 27 is disposed on one surface of the lower casing 20 facing the upper casing 10, a ring of sealing ring 31 is disposed on an outer edge of the diaphragm 30, and the sealing ring 31 is sandwiched between the upper end surface groove 16 and the lower end surface groove 27.

In the above structure, the upper end surface groove 16 and the lower end surface groove 27 improve the fixing function of the diaphragm 30 while fitting and sealing with the seal ring 31.

In this embodiment, the middle of the diaphragm 30 is bowl-shaped and protrudes toward the inlet 22 of the lower chamber 21.

In the structure, the diaphragm 30 is close to the inlet 22 by injecting positive pressure into the upper cavity 11 before operation, so that the diaphragm 30 can be pushed back to absorb the pipeline pulsation when the pipeline has pressure fluctuation.

In this embodiment, the drainage portion 23 is disposed from the inlet 22 along the inner wall of the lower cavity 21 toward the upper cavity 11.

In the above configuration, the drainage portion 23 can guide the liquid entering the lower chamber 21 to the entire space between the diaphragm 30 and the inner wall of the lower chamber 21.

In this embodiment, the drainage portion 23 is preferably a convex rib.

The utility model has the advantages that: the drainage part 23 is used for separating the diaphragm 30 from the inner wall of the lower cavity 21, so that the diaphragm 30 can rapidly introduce pulsating liquid into the space between the diaphragm 30 and the inner wall of the lower cavity 21 in the buffer operation process, and the diaphragm 30 can rapidly move towards the upper shell 10; or when the pulsating liquid is discharged, the drainage part 23 can quickly drain the liquid between the diaphragm 30 and the inner wall of the lower cavity 21, so that the air-out effect is avoided, the redundant pulsation is better absorbed, the vibration is reduced, the pipeline pressure is smoothed, and the flow speed is balanced.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations of the above assumption should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a diaphragm type pulsation damper, includes casing and the lower casing of buckleing each other, it is equipped with the diaphragm to go up between casing and the lower casing, go up and constitute the cavity between casing and the diaphragm, constitute down the cavity between casing and the diaphragm down, upward be equipped with the manometer on the casing and pressurize mouthful, its characterized in that: the lower casing bottom is equipped with the import with cavity intercommunication down, its surface of cavity bottom is equipped with a plurality of along its circumference direction equipartition settings down, is the drainage portion of epirelief or recessed setting for cavity inner wall down.

2. The diaphragm type pulsation damper according to claim 1, wherein: and a bearing plate is arranged between the inlet and the lower cavity body, and a plurality of through holes are formed in the bearing plate in a communicating manner.

3. The diaphragm type pulsation damper according to claim 1, wherein: an upper pressure ring is arranged on the outer wall of one end, facing the lower shell, of the upper shell, and a lower pressure ring is arranged on the outer wall of one end, facing the upper shell, of the lower shell; the upper flange pressing plate and the lower flange pressing plate are fastened through bolts to tightly press the upper pressing ring and the lower pressing ring mutually.

4. The diaphragm type pulsation damper according to claim 3, wherein: the diaphragm is characterized in that an upper end face groove is formed in one face, facing the lower shell, of the upper shell, a lower end face groove is formed in one face, facing the upper shell, of the lower shell, a circle of sealing ring is arranged on the outer edge of the diaphragm, and the sealing ring is clamped between the upper end face groove and the lower end face groove.

5. The diaphragm type pulsation damper according to claim 1, wherein: the middle part of the diaphragm is a bowl-shaped bulge protruding towards the inlet direction of the lower cavity.

6. The diaphragm type pulsation damper according to claim 1, wherein: the drainage part is arranged from the inlet position along the inner wall of the lower cavity body towards the upper cavity body.

7. The diaphragm type pulsation damper according to claim 1, wherein: the drainage part is a convex strip.