CN2213898Y

CN2213898Y - Lift check valve

Info

Publication number: CN2213898Y
Application number: CN 95206310
Authority: CN
Inventors: 林文政
Original assignee: 林文政
Priority date: 1995-03-15
Filing date: 1995-03-15
Publication date: 1995-11-29

Abstract

The utility model relates to a lift check valve, which can make a sealing matching member easy to be replaced after being abraded, and the sealability is enhanced. The lift check valve mainly makes a sealing matching valve seat 2 put at the place of an inlet and on the inner ring face of a valve shell 13, and a sealing ring 1 is arranged between the inlet and the inner ring face of the valve shell. An outer ring shape step and an orbital sleeve which sheathes a valve core on a corresponding face valve core 7 which are on the valve seat 2 make the valve seat 2 position on the central shaft of the valve. A passage slotted hole 10 is opened on the sleeve 3. A cylinder guide block 5 which can slide into the valve seat 2 is on the working face of the valve core 7. The valve core guides into a seat cavity when descending. A ring rubber pad 4 which is corresponding to the working end face D of the valve seat 2 are also embedded on the working face. When the valve core descending, the valve core is buckled sealing with a working ring end face D which is on the valve seat 2, realizing the closing action. The matching members (2, 5, 4) can be replaced after being abraded.

Description

The utility model relates to the valve in the oil field gathering and transportation flow process, belongs to lift check valve.

Fouls such as sand grains and welding slag are contained in the oil field in the medium of being failed in gathering and transferring process, under higher working pressure the working part of the Lift check valve inside of being adopted produced and impact and corrosion, especially fitted seal place serious wear.The cooperating face is impaired serious on the general spool, owing to be fixedly connected, can only put in order valve after impaired and upgrade, and causes waste.

The purpose of this utility model is to avoid deficiency in the above-mentioned technology, and provides working component wearing and tearing back, a kind of fitted seal place easily to change and can improve the lift check valve of sealability, can prolong the working life, cuts the waste.

It is that valve seat is placed in the valve that the purpose of this utility model is implemented, between Sealing is arranged, be connected with the track cover of spool at valve seat and valve core upper sleeve, spool is slip in cover; The guide block that can slip into valve seat is arranged on the spool working surface, also be embedded with on this spool and the corresponding ring rubber cushion of valve seat operative end surface, can realize its purpose by such scheme.

The utility model can have following effect than above-mentioned present technology: owing to be with the track cover on the stroke of spool, spool slides up and down in cover, makes spool by orbiting motion; On the corresponding surface of spool and valve seat, the guide block that can slip into valve seat is arranged, guide block at first imports in the valve seat, centralizes effect in the movement process of spool; Be embedded with the ring rubber cushion corresponding with the valve seat operative end surface on the working surface of spool, these all can reduce the eccentric wear between the motion counterpart, improve sealability.Can take out replacing behind the prooving of valve seat in addition, avoid the renewal of integral valve.

Figure is the utility model complete section configuration diagram.

Below in conjunction with accompanying drawing will the utility model is described in further detail

Shown in accompanying drawing, Lift check valve, valve rod, spool, valve seat and inlet/outlet are arranged in the valve, the utility model is that valve seat 2 is placed on the inner ring surface of import 8 place's valve casings 13, and dress seal ring 1 between the valve casing has the track cover 3 that is with spool on outer ring step and the corresponding surface spool 7 on the valve seat 2, it is in the circular groove that embeds between valve rod 14 and the spool 7 that track overlaps 3 upper ends, make valve rod 14, cover 3 be connected as a single entity with valve seat 2, and valve seat 2 is positioned on the central axis; Make spool 7 in 3 li slips of cover simultaneously.Open axial slots 10 on the cover 3, link up the passage of inlet/outlet (8,12) and valve pocket (9,11).The guide block 5 that can slip into valve seat 2 is arranged on the working surface of spool 7, have leading role to import earlier in the valve support chamber, can be cylindrical body; Also be embedded with and valve seat 2 building ring end faces corresponding ring rubber cushion 4, salable valve seat on the working surface of spool 7.

Be convenient for changing for after wearing and tearing, guide block 5 is split with spool 7, makes cylindrical guide block make two footpath bodies, and miner diameter end embeds on the spool, and connects with screw 6.Ring rubber cushion 4 can be set in 7 li of spools and is enclosed within on the guide block 5, and wherein ring pad 4 has and exposes ring concave surface C, and is corresponding with ring end face D on the valve seat 2, embeds mutually when spool is descending and the coupling of coincideing, and realizes the closing motion of valve.

Claims

1, a kind of Lift check valve has valve rod, spool, valve seat and inlet/outlet in the valve, it is characterized in that:

(1) valve seat (2) is put in import (8) and is located on the inner ring surface of valve casing 13, between adorn seal ring (1), the track cover (3) that is with spool (7) on outer ring step and the corresponding surface spool (7) is arranged on the valve seat (2), cover has slotted eye (10) on (3);

(2) on spool (7) working surface guide block (5) that can slip into valve seat (2) is arranged, also be embedded with the ring rubber cushion (4) corresponding on this face with valve seat (2) operative end surface (D).

2, safety check according to claim 1 is characterized in that: can be embedded with guide block (5) on spool (7) working surface, and attachment screw (6) is arranged.

3, safety check according to claim 1 and 2, it is characterized in that: can stud with ring rubber cushion (4) on spool (7) working surface and the guide block (5), wherein encircling rubber cushion (4) has and reveals ring concave surface (C) and valve seat (2) to go up operative end surface (D) corresponding, when descending and coincide and seal.