CN1011735B

CN1011735B - Button type full-sealed high-speed opening and closing shutoff valve

Info

Publication number: CN1011735B
Application number: CN 87100082
Authority: CN
Inventors: 胡嘉彬; 张富
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-01-08
Filing date: 1987-01-08
Publication date: 1991-02-20
Also published as: CN87100082A

Abstract

The present invention relates to a cut-off valve serving as an opening and closing device in a gas (liquid) storage tank and a pipeline system. As long as a button (9) is lightly rotated, the valve can be opened or closed; the configuration of the button is in a pipeline shape, and a flexible corrugation cavity is utilized to perform the closing function when the valve is opened or closed. In the opening and closing action, parts only make telescopic elastic deformation, and therefore, the parts have no abrasion and compression. The valve body is fully sealed and has no leakage. Completely finishing the opening and closing action only costs 1-2 second, namely that the valve has the characteristic of high-speed opening and closing. When reversed pressure difference generates in the pipeline, the pipeline can be automatically sealed to perform the security protection function. The cut-off valve has portable use, namely that only the button (9) can open and close the valve with various nominal sizes. The cut-off valve has the advantages of high-speed opening and closing, zero wear, long service life, full sealing and high pressure resistance. The pipeline has the advantages of small outer volume, small flow resistance, small occupied area and easy installation.

Description

Button type full-sealed high-speed opening and closing shutoff valve

The invention belongs to valve field.

No matter existing stop valve is that gas, liquid stop valve or the civilian tap water pipe valve of industrial application all has following shortcoming:

(1) stuffing box packing is equipped with in rotation place, and with the passing of time filler must be worn, and leakage phenomenon easily takes place;

(2) it is easy to wear to open and close device feature, thereby influences its working life.

The purpose of this invention is to provide a kind of no filler, parts and do not have wearing and tearing, open and close laborsaving, high speed stop valve flexibly.It can be applicable in the various industrial pipelines, comprises the control flowing gas or is stained with the low liquid of degree that stagnates, and also can be applicable to tap water pipe line.

The present invention is achieved through the following technical solutions: it is to utilize that the pressure reduction of fluid comes opening/shutting valve in the pipeline on principle, need not the external force effect, is designed to following structure for reaching this purpose:

Valve housing is a pipeline type, is made up of front valve shell and rear valve body two-part, and this structure flow resistance is little, and the power source of keying is the pressure reduction of fluid self generation.

Start-stop device main body of the present invention is a scalable corrugated cavity, and it and obturator ring spring, sleeve consist of the integral body of a sealing, produce variation in pressure when liquid (or gas) enters or discharge the bellows cavity.Thereby make cavity produce dilatation, utilize the flexible action of this kind, the seal ring of obturator ring and obturator ring reaches the purpose of opening/shutting valve with valve sealing or unlatching with this.The strength of closing valve is with the automatic synchronization regulation of fluid pressure.For example: the rising of pipeline fluid pressure is then sealed strength and is risen with corresponding multiple.

The present invention has one to drive (manipulation) system, and it is installed in the rear valve body, is made of parts such as knobs, can small external force start valve by it.Its characteristics are that (1) is hermetically sealed; (2) only need very little power can make valve event; (3) Operational Figure Of Merit is very high, that is to say to need only very little displacement, just able to turn on or off valve.Because these three characteristics, the present invention just can be widely used under the various pressure of gas (liquid) body, the temperature, in the pipeline of various nominal bores.

Below in conjunction with the description of drawings embodiments of the invention:

Indicate the import and the outlet of fluid among the figure with the direction of arrow, the sectional view when Fig. 1 opens for stop valve,

Sectional view when Fig. 2 is closed.

Whole valve is divided into front valve shell (15) and rear valve body (1) two-part, and the drive unit of valve is contained on the rear valve body.

Knob (9) is in order to open and close operation, and it directly links to each other with the inclined-plane throw-out collar, and the inclined-plane throw-out collar can be by the knob interlock, and the rotation of inclined-plane throw-out collar directly is pressed on the bearing pin (12), and bearing pin passes upper push-rod (11), so equal to depress upper push-rod.

Inclined-plane throw-out collar cover (8) is sealed the inclined-plane throw-out collar, and plays fixation.

Lower push-rod seal ring retaining ring (7) is pushed down lower push-rod seal ring (6) to fix seal ring, liquid (gas) body that seal ring guarantees to flow through when opening/shutting valve in the valve body can not overflow from this drive unit, but the itself free deformation guarantees to transmit the pressure between upper and lower push rod like this.

Lower push-rod spring (5) guarantees that lower push-rod (3) presses down and the accurate position when resetting.

Lower push-rod shell (4) is in order to connect lower push-rod and lower push-rod spring, to play directing effect.

The keying main body part of valve is a telescopic seal chamber (13), this cavity is contained in the front valve shell (15) of valve, Seal cage is anterior to be tightly connected with obturator ring (18), obturator ring (liquid) stream of being bullied promotes to seesaw, open and close path with this, obturator ring seal ring (17) is connected with obturator ring to guarantee sealing.

Whole valve nominal bore is 20 cun, and external diameter is 44MM, and length is 130MM

The keying working procedure of valve below is described:

Open: the turn knob makes the convex surface of inclined-plane throw-out collar press down bearing pin, by upper push-rod, lower push-rod seal ring lower push-rod is depressed, (also compress simultaneously lower push-rod spring) thus promote the starting piston, make and be skewed, so starting piston place produces the gap, thereby the interior fluid of the cavity of releasing descends inside cavity pressure, inlet's hydrodynamic pressure is pushed obturator ring open, and bellows is compressed.Pipeline is open-minded.Above-mentioned state as shown in Figure 2.

Close: the turn knob makes the concave surface of inclined-plane throw-out collar to bearing pin, because the restoring force of lower push-rod spring is rebounded lower push-rod, work the plug of getting angry and recover normal state, so cavity is sealed, the obturator ring spring pushes away obturator ring forward, and fluid enters cavity from the obturator ring center hole simultaneously, and cavity internal pressure is risen, cavity is upheld, and obturator ring is closed pipe.Above-mentioned state as shown in Figure 1.

Because failure cause, as pipe broken attack wait unusual and when making in the pipe the reverse pressure reduction of generation this valve can blind off a line automatically, this moment, drive unit ceased to be in force automatically after loine pressure is normal, it is normal that this device recovers automatically, above-mentioned functions is finished by the conical plug on the obturator ring, when producing reverse pressure reduction, because the pressure of rear end is blocked the feed liquor aperture of obturator ring conical plug automatically, the interior pressure of Seal cage is remained unchanged, and then the pressure of rear end fluid promotes whole bellows cavity obturator ring is sealed inlet opening in the valve.

Each component names such as following table in the accompanying drawing:

1, rear valve body 2, starting piston 3, lower push-rod 4, lower push-rod shell 5, lower push-rod spring 6, lower push-rod sealing ring 7, lower push-rod sealing ring retainer ring 8, inclined-plane throw-out collar cover 9, knob 10, inclined-plane throw-out collar 11, upper push-rod 12, bearing pin 13, scalable corrugated cavity 14, starting piston spring 15, front valve shell 16, conical plug jump ring 17, obturator ring sealing ring 18, obturator ring 19, conical plug 20, conical plug sealing ring 21, conical plug spring 22, conical plug packing ring 23, starting piston packing 24, sleeve 25, valve seals

Claims

A kind of button type full-sealed stop valve that is used for liquid (gas) body pipe-line system has an import and an outlet, in importing and exporting the valve body that limits, fix a sleeve (24), one corrugated cavity (13) is arranged in described valve body, its end and sleeve are connected as a single entity, the other end is fixed on the obturator ring with holes (18), it is characterized in that: have one to start piston (2) in the cavity, it and described starting piston packing form contact seal, drive the starting piston to realize the keying of valve under the effect of drive system.