CN202691171U

CN202691171U - High pound level forged steel full-open swing check valve

Info

Publication number: CN202691171U
Application number: CN 201220336557
Authority: CN
Inventors: 刘建同; 吴浩; 马海涛
Original assignee: SUZHOU DAOSEN VALVE CO Ltd
Current assignee: SUZHOU DAOSEN VALVE CO Ltd
Priority date: 2012-07-12
Filing date: 2012-07-12
Publication date: 2013-01-23
Anticipated expiration: 2022-07-12

Abstract

The utility model discloses a high pound level forged steel full-open swing check valve, which comprises an integrated type forged steel valve body and a valve cover, wherein a thread-screwed type valve seat component is arranged at an upstream port of the valve body; an unscrewing component is arranged in a body cavity of the valve body; the thread-screwed type valve seat component comprises a valve seat body and an O-shaped sealing washer; a metal sealing ring is arranged at a sealing part of the valve cover and the valve body; and the valve body is connected and fastened with the valve cover by adopting studs and nuts. The check valve disclosed by the utility model has the advantages that the valve seat with a novel structure is developed, the novel middle cavity flange sealing ring is designed and used, and a forged whole structure is adopted by the valve body, thereby guaranteeing good application of the check valve to well head Christmas trees and throttle manifolds.

Description

High pound level forged steel standard-sized sheet Swing check valve

Technical field

The utility model relates to valve technology field, is specifically related to be operated in a kind of latus rectum standard-sized sheet Swing check valve under the hyperbaric environment operating mode.

Background technique

In the last few years, along with China and in the world the demand of the energy is constantly enlarged, the exploitation field of the energy was also day by day wide, and environment harshness has all the more also proposed more stricter designing requirements to the requirement of valve.In the well head of petroleum and petrochemical industry exploitation, manifold in order to prevent that medium from flowing backwards, the safety of prevention production tree and manifold, safety check has played the effect of arriving very much therein, but this has also proposed brand-new challenge to the design work of safety check.

Swing check valve conventional in the prior art does not satisfy the requirement of using under the pressure more than the 42MPa, because its valve body body cavity is excessive, the problems such as the body lid leaks outside and has a big risk, and body cavity interior leakage in valve seat place is serious are more outstanding, therefore inapplicable at high-pressure well mouth and manifold.

Summary of the invention

Goal of the invention of the present utility model is in order to overcome the shortcoming in the above-mentioned background technology, fill up the blank that safety check uses in well head production tree and choke manifold, improve the prior art angle and set out, proposing a kind of high pound level forged steel standard-sized sheet Swing check valve.

The utility model safety check has guaranteed to optimize the sealing configuration of valve on the basis of the interior leakage of valve and outer leak source, has reduced in the interior leakage of high pressure and strict bad working environments lower valve and the risk that leaks outside.

The utility model safety check research and development new structure valve seat, novel lumen flange bicone gasket ring is used in design, and valve body adopts and forges monolithic construction, thereby guarantees the applications well in well head production tree and choke manifold.

The technical solution of the utility model is as follows: a kind of high pound level forged steel standard-sized sheet Swing check valve, include valve body, valve gap, be provided with valve component at the valve body upstream port, in the valve body body cavity, be provided with the spin-up assembly, wherein valve body is integral type forged steel valve body, and valve component is screw thread screwing type valve component, and it is comprised of valve seat body and O RunddichtringO, valve gap and valve seal place are the bicone gasket ring, adopt double-screw bolt and nut to connect fastening between valve body and the valve gap.

Described spin-up assembly comprises the fastening piece of flap, rocking bar and fixing fixedly flap and rocking bar, revolve and open assembly and connect with dunnage by bearing pin, dunnage is fixing by locating stud and valve body limit dais location, dunnage is fixed by screws in the valve body body cavity by pressing plate, and the interior loading type that the bearing pin of rocking bar adopts is fixed in the dunnage.

Also be provided with between described valve component and the valve body between the described valve component of positioning dowel and the valve body and also be provided with positioning dowel, positioning dowel screws by valve body, pin top conical surface is pressed in the spline groove of valve component, makes valve component can not do radial rotating and move axially.

Because technique scheme is used, the utility model compared with prior art has following advantage:

1, the shut-in time is shorter

2, pipeline work is safer

3, long service life

4, cost is low.

Description of drawings

Fig. 1: a kind of forged steel standard-sized sheet Swing check valve

Fig. 2: partial detailed figure

Wherein: 1, valve body, 2, valve component, 3, flap, 4, rocking bar, 5, packing ring, 6, locking nut, 7, cotter pin, 8, dunnage, 9, pendant collet, 10, screw, 11, biconial seal ring, 12, valve gap, 13, double-screw bolt/nut assembly, 14, lifting bolt, 15, bearing pin, 16 Returnning springs, 17, straight pin, 18, positioning screwn, 19, O-ring seals.

Embodiment:

For the ease of a nearly step of the present utility model is understood, make technological means, character of innovation that the utility model realizes, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

1, valve component 2 adopts the form that is threaded to be connected with valve body 1 inner chamber, in order to guarantee that high-pressure medium can not be by revealing between valve body 1 and the valve seat 2, done two seals in valve seat 2 rear ends, it is respectively the sealing that is used in the metal to metal of the O-ring seals of high pressure and valve seat and valve body, the O-ring seals position is on thread root and step surface channel vertical of valve seat afterbody, the sealing station of metal to metal is at the thread root of valve seat afterbody and the step surface of channel vertical, and the slightly degree of making of this face is not more than 0.4 μ m.

2, in order to prevent when the production application, valve component 2 is because a variety of causes causes and the problem appearance is become flexible in valve body 1 disengaging, valve seat need to adopt the measure of loosening that is welded on the valve body or takes other, and for small-bore safety check, welding obviously is relatively more difficult, we have developed a kind of compression location, are namely screwing the compressing valve component with a positioning screwn 18 by valve body, make it can not do radial rotating and move axially.

3, safety check all is that thrust and flap 3 deadweights when having medium to flow backwards fall to finishing usually when cutting out, and in well head production tree and choke manifold in order to prevent that medium from flowing backwards, more need valve closing rapider, so we change the structural design of rocking bar 4, add a Returnning spring 16, and make its reposition force less than the opening force of medium by mechanical model calculating, but when closing, can give 4 one of rocking bars large power of moment, thereby make flap 3 return to more fast closed position, reach the purpose that stops medium.

4, the interior loading type of rocking bar bearing pin 15 employings is fixed in the dunnage 8, has avoided the dew point that leaks of conventional pin shaft hole.

5, dunnage 8 is by valve body 1 limit dais location, and straight pin 17 prevents that dunnage from circumferentially rotating along body cavity relative to valve body 1, has guaranteed the center line of flap 3 and the coincidence of channel centerline, has guaranteed the integrity of sealing.

6, the design philosophy of pendant collet 9, at first in order to compress dunnage 8, make it be unlikely to be pushed away valve body by medium, next is exactly pressing plate, pressing plate is the prototype of pendant collet 9, oneself not pushed away away by medium, has designed pendant collet 9 based on this thought, satisfy designing requirement, optimized again production and processing.

7, body 1 lid 2 lumens sealing, because working condition pressure is high, conventional pads can not seal, we have adopted a kind of biconial metal o-ring 11, this seal ring namely has the advantage of common metal seal ring, can dwindle greatly the lumen diameter again, has reduced lumen thickness.

8, check valve design is full-open type, and when also being the cleaning of having considered pipeline, cleaning ball can pass through smoothly.

9, the design of valve body cavity has guaranteed clog-free effect, makes to be unlikely to residual medium in the body cavity.

This novel embodiment is according to API 6A regulation enforcement, and sealing is reliable, satisfies the desired technical order of standard.

Working principle of the present utility model is:

When 1, working, flap relies on the thrust of medium to open, at this moment valve opening;

2, when medium also stops to export or the accident that medium flows backwards, then flap falls back to rapidly closed position under the effect of Returnning spring power, and this moment, valve clack sealing surface and sealing surface of seat formed complete sealing pair, and valve seal cuts out.

Claims

1. one kind high pound level forged steel standard-sized sheet Swing check valve, include valve body, valve gap, be provided with valve component at the valve body upstream port, in the valve body body cavity, be provided with the spin-up assembly, it is characterized in that described valve body is integral type forged steel valve body, valve component is screw thread screwing type valve component, and it is comprised of valve seat body and O RunddichtringO, valve gap and valve seal place are the bicone gasket ring, adopt double-screw bolt and nut to connect fastening between valve body and the valve gap.

2. high pound level forged steel standard-sized sheet Swing check valve as claimed in claim 1, it is characterized in that described spin-up assembly comprises flap, rocking bar and the fixing fastening piece of flap and rocking bar, revolve and open assembly and connect with dunnage by bearing pin, dunnage is fixing by locating stud and valve body limit dais location, dunnage is fixed by screws in the valve body body cavity by pressing plate, and the interior loading type that the bearing pin of rocking bar adopts is fixed in the dunnage.

3. high pound level forged steel standard-sized sheet Swing check valve as claimed in claim 1, it is characterized in that also being provided with between described valve component and the valve body positioning dowel, positioning dowel screws by valve body, pin top conical surface is pressed in the spline groove of valve component, makes valve component can not do radial rotating and move axially.