CN200993294Y

CN200993294Y - High pressure fluid pulse buffer

Info

Publication number: CN200993294Y
Application number: CN 200620133621
Authority: CN
Inventors: 万东海; 唐海平
Original assignee: Guizhou Aerospace Xinli Casting and Forging Co Ltd
Current assignee: Guizhou Aerospace Xinli Casting and Forging Co Ltd
Priority date: 2006-12-19
Filing date: 2006-12-19
Publication date: 2007-12-19
Anticipated expiration: 2016-12-19

Abstract

The utility model discloses a hi-pressure fluid pulse buffer, which comprises a casing, a capsule assembly, a manometer, a cut-off valve, and a protection hood. A bottom cover, the manometer and the cut-off valve are mounted on the casing, which is a integral hollow casing; the capsule assembly is installed in the casing and parts the inner cavity of the casing into two portions, namely, a fluid cavity in the capsule and an air cavity between the capsule and the casing; the opening of the casing is at the cavity end of the capsule. The integral casing of the utility model can be forged, which avoids any problem in process and quality due to welding; in addition the work-fluid media are enclosed in the capsule cavity, they will not corrode and wear the casing, so that the performance, service life and safety of the casing are highly improved. The utility model is applicable for controller in various hi-pressure fluid delivery pipelines.

Description

The high-pressure liquid pulsation damper

One, technical field:

The utility model relates to a kind of high-pressure liquid pulsation damper that is used for pressure duct, belongs to the fluid pressure control device technical field.

Two, background technique:

The high-pressure liquid pulsation damper is important, the key device that makes hydrodynamic pressure stable.It is widely used in the FLUID TRANSPORTATION pressure duct of industries such as the energy, food, mine, pharmacy, and steady pressure peak value, guarantee pressure duct proper functioning and Safety performance are had crucial effects.

The housing of present high-pressure liquid pulsation damper both domestic and external mainly adopts two lobes up and down to forge after the processing welding fabricated structure that butt welding again forms, its inner chamber butt welding place is a cylinder, and a ring-type weld seam arranged in its structure, the pulsation damper of this welding fabricated structure, because of complex process, its manufacturing, inspection process is various, process-cycle is long, the cost height, and the mass stability of weld seam and welding heat affected zone is difficult to guarantee, reliability is lower, working life is shorter, and particularly equipment and personal safety accident take place easily for its withstand voltage poor safety performance in the course of the work.

Three, summary of the invention:

The purpose of this utility model is: overcome the defective of prior art, provide a kind of simple in structure, make easily, fabricating cost is lower, working life is long, the safe and reliable high-pressure liquid pulsation damper of service behaviour.

The purpose of this utility model realizes by following approach:

High-pressure liquid pulsation damper described in the utility model comprises housing, capsule assembly, pressure gauge, stop valve, safety cover, bottom, the capsule assembly is loaded in the housing, pressure gauge, stop valve are installed on the housing, bottom places the opening of housing, and wherein this high-pressure liquid pulsation damper housing is made the integrated type hollow shell; The capsule assembly is installed in the housing, make the housing inner chamber be separated into two cavitys, i.e. cavity between capsule inner chamber and capsule and the housing, the opening of housing is located at capsule inner chamber end, thereby make high-pressure liquid be in the interior capsule inner chamber of housing all the time, gas is in the cavity between capsule and the housing.

Above-mentioned integrated type hollow shell can be selected forged steel or medium carbon structure steel or stainless steel material for use, and adopting the solid forging method to make profile is that spherical, housing inner chamber is the cavity that circular cone, cylinder, ellipse and spherical combine.

After adopting technique scheme, the utility model pressure-bearing test pressure has improved 30Mpa than domestic and international existing apparatus, has not only avoided the caused a series of problems of welding procedure, but also has avoided and solved the defective that existing apparatus exists; Particularly fluid working medium is enclosed in the capsule inner chamber, housing is not produced corrosion and wearing and tearing during fluid operating, reduce the fluctuation in the pressure duct work, for FLUID TRANSPORTATION provides good operation power, performance, the working life of fluid cushion device are obviously improved, also improved its Security and reliability simultaneously.The utility model compared with prior art, have simple in structure, make easily, fabricating cost is lower, working life is long, the safe and reliable advantage of service behaviour.

Four, description of drawings:

Fig. 1 is the structural representation of the utility model high-pressure liquid pulsation damper.

Among the figure: 1-nut, 2-bolt, 3-bottom, 4-opening in shell, 5-housing, 6-capsule assembly, 7-fluid chamber, 8-balance plate, 9-air chamber, 10-screw, 11 discs, 12-pressure gauge, 13-screw, 14-safety cover, 15-stop valve, 16-pressing plate.

Five, embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in the figure; the utility model comprises housing 5, capsule assembly 6, pressure gauge 12, stop valve 15, safety cover 14; bottom 3; it is the spherical cap type hollow shell that its middle shell 5 usefulness stainless steel materials adopt after solid forging machining process to be made into profile; the housing inner chamber is the cavity that circular cone, cylinder, ellipse and spherical combination of shapes form, and the inner chamber machined surface roughness is that Ra1.6 gets final product.The opening 4 that communicates with inner chamber is located at the lower end of housing, and the upper end of housing is provided with setting pressure table 12, stop valve 15 and safety cover 14, and safety cover 14 usefulness screws 13 are fixing; Capsule assembly 6 is made up of capsule, disc 11, balance plate 8, pressing plate 16, packing ring and screw 10, in the housing 5 of packing into after its assembling, make it the housing inner chamber is separated into two cavitys, be interior fluid chamber 7 of capsule and the air chamber 9 between capsule and the housing, bottom 3 is installed in the opening of housing by nut 1 and bolt 2.

When using the utility model, be connected on the pressure duct flange with bolt 2, nut 1 by the perforate on the housing earlier, and compress bottom 3.Be filled with the nitrogen (about 45Mpa) of certain pressure in the air chamber 9 that between housing and capsule assembly, forms (being also referred to as active chamber) in advance, its fluid chamber 7 (being also referred to as down active chamber) links to each other with high-pressure duct system by the perforate on the housing 4, the pressure in fluid operating chamber is to Maximum operating pressure (35Mpa) all the time by negative pressure (less than atmospheric pressure), and variation in pressure is a sinusoidal curve, 120 ° of two active chamber phase differences; In the work, when carrying head pressure greater than ball type housing air chamber pressure, gas in its chamber is compressed, and spatial volume reduces, and its gas inside pressure increases, reach two cavity pressure balances up and down, when working pressure fluctuateed, the pressure of air chamber 9 (epicoele) changed thereupon, and its volume also changes along with the variation of working pressure simultaneously, thereby reach pressure balance, pipeline is in the stable working procedure all the time.

Claims

1, a kind of high-pressure liquid pulsation damper, comprise housing (5), capsule assembly (6), pressure gauge (12), stop valve (15), safety cover (14), bottom (3), capsule assembly (6) is loaded in the housing (5), pressure gauge (12), stop valve (15) are installed on the housing (5), bottom (3) places the opening of housing, it is characterized in that: the housing of this high-pressure liquid pulsation damper (5) is the integrated type hollow shell; Capsule assembly (6) is separated into two cavitys with the housing inner chamber after being installed in the housing, i.e. fluid chamber (7) in the capsule and the air chamber (9) between capsule and the housing, and it is the lower end of housing (5) near capsule inner chamber place that the perforate of housing (4) is located at the assembling back.

2, by the described high-pressure liquid pulsation damper of claim 1, it is characterized in that: described integrated type hollow shell (5) is for spherical, and the housing inner chamber is the cavity that circular cone, cylinder, ellipse and spherical combine.

3, by claim 1 or 2 described high-pressure liquid pulsation dampers, it is characterized in that: hollow shell (5) material is forged steel or medium carbon structure steel or stainless steel.

4, by claim 1 or 2 described high-pressure liquid pulsation dampers, it is characterized in that: described hollow shell (5) is to adopt solid forging method and machining process to make.