CN102287554A - Direct-current stop valve for double-insurance corrugated pipe - Google Patents

Abstract

The invention provides a direct-current stop valve for a double-insurance corrugated pipe. The direct-current stop valve comprises a valve body, a spherical sealing surface, a flow direction mark, a spherical valve clack, a back-to-back ring, a welding seam, a valve clack bracket, a spherical cap, a bracket pin shaft, a corrugated pipe, a valve rod, a valve cover, a valve rod nut, a flange, a valve cover cap, a hand wheel shaft, a graphite metal net back sealing element, a rolling bearing, a hand wheel, a butterfly spring and a clamped nut. The invention has the advantages that: (1) the direct-current stop valve for the double-insurance corrugated pipe has a novel and unique structure, a short valve body, light weight and low manufacturing cost; (2) the structure of the valve body can meet the requirement of a swing check valve and the design requirement of the direct-current stop valve, and the stop valve has stopping, non-return and throttling functions naturally; (3) media have a straightway flow direction, do not have flow resistance nearly and save energy; and (4) the sealing surface is not abraded, has a high sealing property and long service life and is an updating preferred product on a chlorine gas conveying pipeline.

Description

Dual fail-safe corrugated pipe direct-current stop valve

Technical field

The present invention relates to a kind ofly many does not have filler corrugated pipe direct-current stop valve with dual fail-safe, specifically, relates to a kind of adjustable direct current screw down nonreturn valve that is used for preventing on the chemical industry chlorine pipeline medium back flow, has another name called the axial flow screw down nonreturn valve.

Background technique

The passage of traditional stop valve circulation becomes S shape, and the medium transport flow resistance is big, the energy consumption height, and economic performance is the poorest, besides length is the longest, weight is maximum, cost is the highest.This is stop valve three big in the valve industry.

As everyone knows, filler is the least reliable seal element in the valve industry, also is the most too busy to get away sealing material, although invented bellows on the chlorine pipeline, but bellows in a single day break, consequence is hardly imaginable.For safety, have only and guarantee thriftyly for ripple filler again with the mechanism of a complexity, this cries the dual fail-safe of bellows filler.

Safety check is a kind of indispensable safety auto-controlled valve on pipeline, and at present, China's chemical industry is not specialized in the check valve special on the chlorine pipeline, all use general check valve on the chlorine pipeline, because sealed attachment form and structure are unreasonable, Sealing and material are not corrosion-resistant, and damage easily comes off, easily leak, even the generation security incident, valve is short working life, changes frequent, influence is produced, and causes economic loss.

Summary of the invention

The objective of the invention is in order to overcome the deficiencies in the prior art part, the chlorine special-purpose multifunctional selfsealings dual fail-safe corrugated pipe direct-current stop valve of a kind of novel structure, good seal performance, safe and reliable, long service life is provided.

Dual fail-safe corrugated pipe direct-current stop valve of the present invention, comprise valve body (1), be located at the sphere flap (4) of valve body (1) top, be located at the flap support (7) of sphere flap (4) top, be located at the bulb cap (8) of flap support (7) top, be located at the inner rack pin shaft (9) of bulb cap (8), be located at the bellows (10) of bulb cap (8) top, be located at bellows (10) inboard valve rod (11) and Stem Mut (13), be located at the valve gap (12) in bellows (10) outside, be located at the flange (14) between bellows (10) and the Stem Mut (13), be located at the bonnet cap (15) on the valve gap (12), be located at the hand wheel shaft (16) that Stem Mut (13) top links to each other with Stem Mut (13) by coupled axle-pin, be located at the graphite wire netting back seal element (17) and the rolling bearing (18) in hand wheel shaft (16) outside, be located at the handwheel (19) of hand wheel shaft (16) outer upper, be located at the butterfly spring (20) and the fastening screw nut (21) of handwheel (19) top, wherein valve body (1) is provided with and flows to sign (3), sphere flap (4) bottom is provided with ball face sealing face (2), is provided with divided ring (5) and weld seam (6) between sphere flap (4) and the flap support (7).

Dual fail-safe corrugated pipe direct-current stop valve of the present invention has following technique effect:

1) novel structure uniqueness, the valve body length dimension is little, and is in light weight, low cost of manufacture.

2) valve body structure can guarantee the requirement of Swing check valve, can satisfy the designing requirement of direct current stop valve again, has become naturally by, non-return, throttling, multi-purpose valve;

3) MEDIA FLOW does not almost have flow resistance to straight-through, and is energy-conservation;

4) sealing surface belongs to zero friction, good seal performance, and long service life is the first-selected product of the replacement on the chlorine delivery line.

Description of drawings

Fig. 1 is the cross-sectional view of dual fail-safe corrugated pipe direct-current stop valve of the present invention.

Wherein, 1 is valve body, and 2 is the ball face sealing face, and 3 for flowing to sign, 4 is the sphere flap, and 5 is divided ring, and 6 for putting weld seam, and 7 is the flap support, 8 is the bulb cap, and 9 is rack pin shaft, and 10 is bellows, and 11 is valve rod, 12 is valve gap, and 13 is Stem Mut, and 14 is flange, and 15 is bonnet cap, 16 is hand wheel shaft, and 17 is graphite wire netting back seal element, and 18 is rolling bearing, 19 is handwheel, and 20 is butterfly spring, and 21 is fastening screw nut.

Embodiment

Further specify the present invention below by embodiment.Should correct understanding be: embodiments of the invention are only used for the present invention is described and provide, rather than limitation of the present invention.So, under the invention prerequisite, simple modifications of the present invention is all belonged to the scope of protection of present invention.

As shown in Figure 1, dual fail-safe bellows stop valve of the present invention comprises valve body (1), be located at the sphere flap (4) of valve body (1) top, be located at the flap support (7) of sphere flap (4) top, be located at the bulb cap (8) of flap support (7) top, be located at the inner rack pin shaft (9) of bulb cap (8), be located at the bellows (10) of bulb cap (8) top, be located at bellows (10) inboard valve rod (11) and Stem Mut (13), be located at the valve gap (12) in bellows (10) outside, be located at the flange (14) between bellows (10) and the Stem Mut (13), be located at the bonnet cap (15) on the valve gap (12), be located at the hand wheel shaft (16) that Stem Mut (13) top links to each other by coupled axle-pin, be located at the graphite wire netting back seal element (17) and the rolling bearing (18) in hand wheel shaft (16) outside, be located at hand wheel shaft (16) outside and the handwheel (19) above graphite wire netting back seal element (17) and rolling bearing (18), be located at the butterfly spring (20) and the fastening screw nut (21) of handwheel (19) top, wherein valve body (1) is provided with and flows to sign (3), sphere flap (4) bottom is provided with ball face sealing face (2), is provided with divided ring (5) and weld seam (6) between sphere flap (4) and the flap support (7).

The workflow of stop valve of the present invention is as follows:

When valve open, handwheel (19) rotation counterclockwise drives hand wheel shaft (16) directly transmission Stem Mut (13) rotation under the effect of coupled axle-pin successively, under the effect of screw thread, make valve rod (11) when straight line rises to top dead center, valve wide open, when medium flowed to sign (3) direction entrance point and enters valve body by valve body (1), entrance point pressure was greater than outlet end, and can push the circulation that is in line of sphere flap medium automatically open by the pressure of medium.In case medium has the possible sphere flap (4) of backflow to close automatically, becomes safety check.If medium does not reflux when needing the positive closing valve, make the decline of valve rod (11) straight line force flap support (7) to compress sphere flap (4) rotation of handwheel clockwise direction and again handwheel is locked until positive closing.

Claims (1)

1. dual fail-safe corrugated pipe direct-current stop valve, it is characterized in that, comprise valve body (1), be located at the sphere flap (4) of valve body (1) top, be located at the flap support (7) of sphere flap (4) top, be located at the bulb cap (8) of flap support (7) top, be located at the inner rack pin shaft (9) of bulb cap (8), be located at the bellows (10) of bulb cap (8) top, be located at bellows (10) inboard valve rod (11) and Stem Mut (13), be located at the valve gap (12) in bellows (10) outside, be located at the flange (14) between bellows (10) and the Stem Mut (13), be located at the bonnet cap (15) on the valve gap (12), be located at the hand wheel shaft (16) that Stem Mut (13) top links to each other with Stem Mut (13) by coupled axle-pin, be located at the graphite wire netting back seal element (17) and the rolling bearing (18) in hand wheel shaft (16) outside, be located at the handwheel (19) of hand wheel shaft (16) outer upper, be located at the butterfly spring (20) and the fastening screw nut (21) of handwheel (19) top, wherein valve body (1) is provided with and flows to sign (3), sphere flap (4) bottom is provided with ball face sealing face (2), is provided with divided ring (5) and weld seam (6) between sphere flap (4) and the flap support (7).

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