CN204784800U

CN204784800U - Take pressure self sealss wafer valve disk seat

Info

Publication number: CN204784800U
Application number: CN201520423872.9U
Authority: CN
Inventors: 张川; 郑嘉英; 刘鸣; 郑泳; 林刚
Original assignee: Baoji Oilfield Machinery Co Ltd
Current assignee: Baoji Oilfield Machinery Co Ltd
Priority date: 2015-06-18
Filing date: 2015-06-18
Publication date: 2015-11-18
Anticipated expiration: 2025-06-18

Abstract

The utility model discloses a take pressure self sealss wafer valve disk seat, it has branch separating groove to open along the inner wall circumference in the hole of disk seat both sides, divides separating groove to set up and leans on the lining position at disk seat both sides hole, using and dividing separating groove to set up to direct hole as boundary, disk seat hole inner segment, the outer section of disk seat hole sets up as the outer taper hole that expands gradually. The utility model discloses a tapered taper hole is taken through one section processing outside the disk seat hole to the structure, when the taper hole of disk seat under fluid pressure's effect, automatic and the closely laminating of the sealed face of valve plate realize under fluid pressure the disk seat area and press self sealss, the improvement of this kind of structure, the suitability is strong, reliable and simple, sealed safe high -efficient, is a improved design who transforms the formula, is suitable for the valve body structure that end face seal was realized to all valve plates and disk seat.

Description

A kind of band pressure self-sealing flap type valve seat

Technical field

The utility model belongs to mechanical equipment technical field, relates to a kind of band pressure self-sealing flap type valve seat.

Background technique

Flap type is applied very extensive in the every fluid operation in oil field, and being mainly used in the equipment such as oil well head oil recovery (gas) tree, manifold, is the control unit controlling fluid changes in flow rate.Existing various flap type, no matter in factory during pressure testing or in the application process of user's reality, the sealing surface that there will be valve plate and valve seat all unavoidably can not seal completely and occur the situation of seepage.

In view of the flap type valve seat that current home and abroad is all is all take clear opening to design, as shown in Figure 1 and Figure 2, when valve seat and valve plate end face seal, due to the impact of design error and machining error, after causing assembling there is certain fit up gap in valve plate and sealing surface of seat, when throttle down, liquid passes through valve seat endoporus in pressure effect, act on completely on valve plate, valve plate is caused to depart from the sealing surface of valve seat, produce certain interval, thus greatly reduce sealing effect or can not seal completely.

Model utility content

The purpose of this utility model is to provide a kind of band pressure self-sealing flap type valve seat, solve valve plate and sealing surface of seat after assembling in prior art and there is certain fit up gap, when throttle down, liquid passes through valve seat endoporus in pressure effect, act on completely on valve plate, cause valve plate to depart from the sealing surface of valve seat, produce certain interval, thus greatly reduce sealing effect or can not complete hermetic problem.

The technological scheme that the utility model adopts is, a kind of band pressure self-sealing flap type valve seat, and have separating groove along inwall circumference in the endoporus of valve seat both sides, separating groove is arranged on valve seat both sides endoporus by inner position;

Take separating groove as boundary, valve seat endoporus inner segment is set to clear opening, and the outer section of valve seat endoporus is set to the taper hole extended out gradually.

Band pressure self-sealing flap type valve seat of the present utility model, is further characterized in that:

Taper hole is that the whole or close external port of the outer section of valve seat endoporus is along one section.

The beneficial effects of the utility model are: by processing the taper hole of a length of tape tapering in the outer section of valve seat endoporus, when under the effect at fluid pressure of the taper hole of valve seat, automatic and sealing surface of valve plate fits tightly, realize in the selfsealings with pressure of fluid pressure lower valve base, the improvement of this kind of structure, applicability is strong, simple, sealingly secure is efficient, is a kind of Curve guide impeller changing formula, is suitable for the valve body structure that all valve plates and valve seat realize end face seal.

Accompanying drawing explanation

Fig. 1 is existing sealed structural representation;

Fig. 2 is the stress schematic diagram of existing valve plate and valve seat;

Fig. 3 is the utility model sealed structural representation;

Fig. 4 is the stress schematic diagram of the utility model valve plate and valve seat.

In figure, 1. valve plate, 2. valve seat, 3. separating groove, 4. taper hole.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.

With reference to Fig. 1, Fig. 2, the sealing configuration of prior art is, separating groove 3 is arranged on valve seat 2 clear opening outer position, when valve plate 1 is closed, because the hole of opening in valve seat 2 is clear opening shape (aperture is D), the pressure P that liquid produces all acts on valve plate 1, and the sealing surface causing valve plate 1 to combine with the valve seat 2 of stressed side under the effect of the pressure produces slight gap, causes sealing completely or seal failure.

With reference to Fig. 3, Fig. 4, structure of the present utility model is, in the endoporus of valve seat 2 both sides, have separating groove 3 along inwall circumference, and separating groove 3 is arranged on valve seat 2 both sides endoporus by inner position, with separating groove 3 for boundary, valve seat 2 endoporus inner segment is set to clear opening, and diameter is D1, and the outer section of valve seat 2 endoporus is set to the taper hole 4 extended out gradually, taper hole 4 is that the whole or close external port of the outer section of valve seat 2 endoporus is along one section, taper hole 4 external port diameter is D2, and the conical surface oblique angle of taper hole 4 is a, and diameter D2 is greater than diameter D1.

Need to reequip structure, section opening's edge outside valve seat 2 endoporus can be adopted to process one section of taper hole 4 and can change to above-mentioned new structure mode.

Working principle of the present utility model is,

When valve plate 1 closes sealing, the end face gluing, sealing of valve plate 1 and valve seat 2, when being subject to fluid pressure P, the conical surface of the taper hole 4 outside valve seat 2 produces certain positive pressure under the effect of pressure P, thus valve seat 2 is fitted tightly under the effect of pressure P more with the sealing surface of valve plate 1, realize the with pressure selfsealings of valve seat 2 under fluid pressure, change the realizing active sealing mode that existing passive seal mode is innovation structure, significant sealing affection improves.

Claims

1. be with a pressure self-sealing flap type valve seat, it is characterized in that: have separating groove (3) along inwall circumference in the endoporus of valve seat (2) both sides, separating groove (3) is arranged on valve seat (2) both sides endoporus by inner position;

With separating groove (3) for boundary, valve seat (2) endoporus inner segment is set to clear opening, and the outer section of valve seat (2) endoporus is set to the taper hole (4) extended out gradually.

2. band pressure self-sealing flap type valve seat according to claim 1, is characterized in that: taper hole (4) is for the whole or close external port of the outer section of valve seat (2) endoporus is along one section.