CN2222834Y

CN2222834Y - Stop valve

Info

Publication number: CN2222834Y
Application number: CN 95206311
Authority: CN
Inventors: 林文政
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-15
Filing date: 1995-03-15
Publication date: 1996-03-20
Anticipated expiration: 2005-03-15

Abstract

The utility model relates to a stop valve used for the process flow of the well head of an oil field pumping machine. The easily damaged valve seat 2 of the utility model can be changed, and an accurate closing motion can be realized in time. The valve seat is provided with a belled mouth end fitting with a cone on a valve core so as to improve the performance of corrosion and erosion to working media. The utility model is mainly characterized in that a valve seat 3 is arranged in the valve; a trajectory sleeve 4 of an annular step-connecting core is formed in the upper valve casing of the valve core 5 and on the lower valve seat 3, so that the valve core can slide up and down along the track; the valve seat is provided with a port fitting with the cone on the valve core to increase mating surfaces, the port forms a a belled mouth shape, so the corrosion resistance is strengthened. A valve cap 11 is provided with an inner press cap 9 and seal components in mating positions to increase the seal of the valve.

Description

Stop valve

The utility model relates to a kind of valve in the technological process of oil-field oil pumper well head, belongs to stop valve.

For guaranteeing the ordinary production of mouth of pumped oil well on the oil field, on well head ground, take multiple measure, form different technological processes.Wherein water mixing main valve and modulating valve, flushing valve, the profit connecting valve, level pressure venting stop valve, reflux valve all belongs to stop valve.Impurity such as acid, alkali, sand grains and welding slag are arranged in the medium for valve work, under higher hydrodynamic pressure, workpiece in the valve, especially the sealing part counterpart is corroded and serious wear, just miss in a short time, and all be fixed installation to sealing part cooperating spare on the valve simultaneously, the wearing and tearing back is difficult for changing, need whole valve to upgrade, cause waste, cost is increased.

The purpose of this utility model is to avoid deficiency in the above-mentioned technology, and need provide a kind of fitted seal place working component easily to change and wear-resisting stop valve, can prolong the working life, cuts the waste.

It is that valve seat is put in the valve casing that the purpose of this utility model is implemented, and be provided with " O type " circle between the valve casing, this valve seat has and upper conical toroidal port with tapering of spool, and on the inner annular step that forms outside the valve seat on ring-shaped step and the upper valve cap, be with the track cover of spool, spool is slided in cover, make simultaneously to form the annular conical surface sealing between spool and the valve seat, improve wear-resisting property, valve seat is also easily changed.Sealing between pressure cap reached in valve gap top was provided with, the sealing that can improve valve.Make the spool of circular cone cylindricality, can increase the wear-resistant surface of working medium, thereby can realize its purpose of design.

The utility model can have following effect than above-mentioned present technology:

For the spool that is the circular cone cylindricality, valve seat is replaceable, simultaneously valve seat have with spool on the toroidal port that matches of cone, the washing away of impurity in the working medium, erosional surface have been increased, can prolong the working life of spool and valve seat, valve seat is easily to take off renewal simultaneously, and integral valve is changed in the back of need not wearing and tearing, and helps saving.

Fig. 1 is the full sectional drawing of the utility model;

Fig. 2 is the structural drawing of Fig. 1 upper valve base 2;

Fig. 3 is the enforcement illustration of Fig. 2 upper valve core 5;

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

By shown in Figure 1, valve seat 3 is arranged in the valve body, spool 5 is arranged, into and out of the stop valve of working hole (15,16) and valve gap 11 and outer pressure cap 10 formations on the valve rod 6.The utility model is that valve seat 3 is put on the inner ring surface of the outlet 16 of valve casing, can therefrom take out, and be provided with sealing gasket 2 between the valve casing, can be " O type " packing; And valve seat 3 suitable for reading is two chambeies, footpath and tubaeform port one 7 arranged, body profile circularizes step, as shown in Figure 2, ring-shaped step in this ring-shaped step and the top is with the track cover 4 of spool 5, spool 5 slides up and down in cover 4, it is slided by track, overlap and have 4 passage slotted eyes 13 on 4 walls, be communicated with inlet/outlet on the valve; Pressure cap 9 in being provided with within the pressure cap 10 outside has seal ring 7 between interior pressure cap 9 and the valve rod 6, and has between the end face of valve gap 11 and seal air ring 8, and and valve gap 11 between leave gap ring cavity A.For one cylinder 1 being arranged on the spool 5 of taper platform, the path chamber of the external diameter of cylinder 1 and valve seat 3 coincide, and makes cylinder 5 can extend into 3 li of valve seats and can slide, and the tapering on the tapering on the while spool 5 and the port one 7 of valve seat 3 matches, the increase fitting surface.

The end of above-mentioned cylinder 1 can form cone B, in looking for and shunting action, by shown in Figure 3.By shown in Figure 1, can form ring cavity (14) between track cover 4 and the valve casing.Fluid is flowed out from exporting 16 through valve pocket 12 by valve import 15.

Claims

1, a kind of stop valve has valve seat (3) in the valve body, spool (5) is arranged on the valve rod (6), and the stop valve into and out of working hole [15,16], valve gap (11) and outer pressure cap (10) constitute is characterized in that:

(1) valve seat (3) is put on the inner ring surface of the outlet (16) at valve gap, and is provided with seal ring (2) between the valve casing; And valve seat (3) is suitable for reading to be chambeies and tubaeform port (17) is arranged, two footpaths, and body profile circularizes step, and the ring-shaped step in ring-shaped step and the upper valve cap (11) is with the track cover (4) of spool (5), overlaps on (4) wall to have 4 passage slotted eyes (13);

(2), be provided with interior pressure cap (9) within the outer pressure cap (11), between interior pressure cap (9) and the valve rod (6) sealing annular ring (7) arranged, and between the end face of valve gap (11) sealing annular ring (8) is arranged, and and valve gap (11) between leave gap ring cavity (A);

(3) on the spool (5) of taper platform one garden post (1) is being arranged; The path chamber of the external diameter of garden post (1) and valve seat (3) coincide, and the tapering of the port (17) of the tapering of spool (5) and valve seat (3) matches.

2, stop valve according to claim 1 is characterized in that: the end of garden post (1) can form cone B, and valve seat (3) can form one with track cover (4).