CN2432397Y

CN2432397Y - Stop valve

Info

Publication number: CN2432397Y
Application number: CN 00220505
Authority: CN
Inventors: 杨洪俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-02
Filing date: 2000-06-02
Publication date: 2001-05-30
Anticipated expiration: 2010-06-02

Abstract

The utility model relates to a stop valve. The lower end surface of a detachable upper valve core in the existing valve body is changed into a hexagonal sealing plane surface; a fixed lower valve core is changed into a hollow outer hexagonal bolt type detachable valve core, and screw threads out of the lower end are matched with the inner screw threads on a valve core seat; a sealing ring is matched between the lower valve core and the valve core seat, and the lower valve core and the valve core seat are sealed. When the utility model leaks and needs repairing, a valve cover is opened, and the upper and the lower valve cores are taken out and are replaced by new upper and lower valve cores; the entire stop valve does not need to be replaced, and a heat insulation device can be prevented from being damaged.

Description

Stop valve

The utility model is used for gas pipeline, especially is applicable to a kind of stop valve of corrosive liquids pipeline.

Stop valve is widely used in industries such as generating, chemical industry, dyeing and finishing, medical treatment.Because stop valve is under the working staties such as high temperature, high pressure, high velocity air, corrosion for a long time, the spool of stop valve the inside is easy to impaired distortion and causes leakage.The present stop valve that uses, though its upper valve core can shirk, lower valve core can not shirk because the needs of sealing are fixed on the valve seat, has no alternative, people are often with whole stop valve old for new service.In the replacing process, will certainly destroy the thermal insulation apparatus on original pipeline, and operating difficulties, the replacing time is long, makes troubles and economic loss to enterprise.

The purpose of this utility model is that a kind of improved stop valve will be provided, when produce to leak need repairing,, replace with easily as long as open valve gap, lower valve core just, need not to change whole stop valve.

The purpose of this utility model is achieved in that and makes the lower end surface of detached type upper valve core in the existing valve body into the hexagonal sealing plane, make fixed lower valve core the detached type spool of hollow outer-hexagonal or interior hexagonal sieve bolt style into, rib-loop matches with interior rib-loop on the valve core case beyond its lower end.And between lower valve core and valve core case, be equipped with the seal ring sealing.

The utility model is because as long as make lower valve core into detached type, add the quality seal circle is set, make former upper valve core lower end surface into plane type, like this, not only solved the sealing reliability problem, and it is very convenient when repairing, as long as replace upper and lower spool, need not to change whole stop valve, reduced user cost, saved the time, the thermal insulation apparatus on original pipeline is not damaged.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a longitudinal section of the present utility model tectonic maps.

Fig. 2 is the enlarged view of lower valve core among Fig. 1 (5).

Fig. 3 is the plan view of Fig. 2.

Fig. 4 is the worm's eye view of upper valve core among Fig. 1 (4).

Among the figure: 1, handwheel 2, valve rod 3, valve gap 4, detached type upper valve core 5, detached type lower valve core 6, valve core case 7, valve body 8, sealing material 9, upper valve core hexagonal sealing plane 10, lower valve core ring packing line 11, chamfering 12, seal ring 13, step.

With reference to Fig. 1, stop valve comprises the valve body (7) that import and export are arranged about, valve gap (3) is arranged at its top, valve body central authorities have one pass valve gap can oscilaltion valve rod (2), handwheel (1) is equipped with in the valve rod upper end, between valve gap (3) and valve rod (2), fill out, detached type upper valve core (4) is housed in the underpart of valve rod, on valve core case (6) corresponding below the upper valve core, be provided with removable lining lower valve core (5) with sealing material (8).With reference to Fig. 2, Fig. 3 as can be known, lower valve core is hollow outer-hexagonal sieve bolt style, the interior rib-loop close fit on its cylindrical rib-loop and the valve core case, and hollow parts is the pipe shape.Lower valve core also can be made into hollow outer anistree sieve bolt style, and hollow parts is interior anistree tubulose or interior hexagonal tubulose (not drawing among the figure), and it is suitable for reading ring packing line (10), and peripheral hexagonal has chamfering (11).Between lower valve core step (13) and valve core case (6), be provided with seal ring (12).In Fig. 4, (9) are the sealing plane of upper valve core, and peripheral hexagonal has chamfering (11).In Fig. 1, valve rod (2) promotes, and stop valve is in opening state, and gas or liquid can enter valve body from the left side and export away from the right by lower valve core (5).When valve rod (2) descended, the sealing plane of upper valve core (9) fitted with the ring packing line (10) of lower valve core, and at this moment, gas or liquid are just dammed.Destroyed when the upper-lower seal face, as long as open valve gap (3), take out to go up the lower valve core old for new service with special tool and get final product, just the sealing plane of old spool manually or machinery polish again and can use.

Claims

1, a kind of stop valve, this valve has a valve body (7), valve gap (3) is arranged at top, there is a valve rod (2) that passes valve gap can oscilaltion in valve body central authorities, handwheel (1) is equipped with in the valve rod upper end, detached type upper valve core (4) is equipped with in the valve rod underpart, on the valve core case (6) in the valve body lower valve core (5) is housed, the lower end surface that it is characterized in that upper valve core (4) is the hexagonal sealing plane, the lower valve core (5) corresponding with the upper valve core below is the detached type spool of hollow outer-hexagonal or outer anistree sieve bolt style, the spool upper-end surface has a ring packing line (10) corresponding with upper valve core hexagonal sealing plane, is provided with seal ring (12) between lower valve core step (13) and valve core case (6).

2, stop valve as claimed in claim 1 is characterized in that rib-loop beyond the lower end of lower valve core (5) matches with internal thread on the valve core case (6).

3, stop valve as claimed in claim 1 is characterized in that the hollow space of lower valve core (5) is made into pipe shape or interior hexagonal tubulose, or interior anistree tubulose.