CN2377404Y

CN2377404Y - Internal seal type leakless valve

Info

Publication number: CN2377404Y
Application number: CN 99213431
Authority: CN
Inventors: 王玉明; 王林源
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-08
Filing date: 1999-06-08
Publication date: 2000-05-10
Anticipated expiration: 2009-06-08

Abstract

The utility model discloses an internal seal type valve without leakage, which is mainly composed of a hand wheel, a valve rod, an upper valve body, a lower valve body, etc. The utility model is characterized in that springs are sheathed in an upper hollow cavity of the upper valve body and outside the valve rod, and the upper and the lower ends of the spring are respectively contacted with an upper and a lower spring seats. A clamp spring clamped on the valve rod is arranged above the upper spring, a conical sleeve is fixed in a lower hollow cavity of the upper valve body, and the lower part of the valve rod is provided with a spherical seal sleeve matched with the conical sleeve. The utility model has the characteristics of simple structure, low cost, high pressure resistance, no water leakage and no air leakage, internal seal type seal is used, and the reliability of seal surfaces is ensured.

Description

The internal sealed leakage-free valve

The utility model relates to a kind of valve, particularly a kind of internal sealed leakage-free valve.

At present, common valve generally all is to do filler with materials such as asbestos packings, compresses with bolt and regulates sealing, belongs to external sealed formula valve, and valve rod is upper and lower mobile, and sealing surface is wayward, and sealing effect is bad, leaks easily, leaks gas.

The purpose of this utility model just is to provide a kind of employing inner sealing mode, good sealing effect, water-tight, gastight valve---internal sealed leakage-free valve.

Technical solution of the present utility model is: in the upper plenum of upper valve body, the outer cover of valve rod is equipped with spring, the upper and lower end of spring contacts with upper and lower spring seat respectively, but is being provided with the jump ring of dogging on valve rod above the upper spring seat; Following cavity internal fixation at upper valve body has taper sheath, is provided with the spherical stuffing box gland with the taper sheath mating reaction in the bottom of valve rod.Lower end at valve rod is connected with spherical valve gap by screw rod, covers at spherical valve and is provided with guide pad.

The utility model is simple in structure, and is with low cost, broken through traditional external sealed mode, adopt the internal sealed structure, guaranteed the reliability of sealing surface, and high pressure resistant, have water-tight, gastight characteristics, thereby solved the serious problems that common valve leaks, leaks gas.

Below in conjunction with accompanying drawing and most preferred embodiment content of the present utility model is further elaborated.

Fig. 1 is a main TV structure cross-sectional schematic of the present utility model;

Fig. 2 is that A-A among Fig. 1 is to the sectional structure schematic representation.

With reference to accompanying drawing, the utility model mainly is made up of handwheel 1, valve rod 3, upper valve body 7 and following valve body 13 etc., handwheel 1 is connected with valve rod 3, upper valve body 7 adopts bolt to be connected with following valve body 13, in the upper plenum of upper valve body 7, the outer cover of valve rod 3 is equipped with spring 6, the upper and lower end of spring 6 is separately fixed on upper and

lower spring seat

5 and 15, but is being provided with the jump ring 4 of dogging on valve rod 3 above the upper spring 5, and the upper cap of upper valve body 7 is buckled with gland 2; Following cavity internal fixation at upper valve body 7 has taper sheath 8, is provided with internal thread in the lower end of valve rod 3, and is connected with spherical valve gap 12 by screw rod 10, and spherical valve gap 12 is provided with guide pad 11; Be provided with the seal ring 14 of the effect of matching with spherical valve gap 12 in the inside of following valve body 13.

Working procedure of the present utility model is: rotate handwheel, drive screw rod and move up and down thereby drive the valve rod rotation, make spherical valve gap break away from seal ring or be pressed on the seal ring; Two inner side surfaces of following valve body have guide surface, can be slidingly matched with guide pad, and screw rod can be moved up and down freely, reach the effect of unlatching or throttle down.

Valve rod can not move up and down in the utility model, can only rotate, thereby the sealing surface between spherical stuffing box gland and taper sheath controls easily, and the reliability height, water-tight, air tight; In addition, under the effect of spring force, valve rod is subjected to Driving force upwards, and spherical stuffing box gland is closely contacted with taper sheath, has further guaranteed the tight of sealing surface.

Claims

1, a kind of internal sealed leakage-free valve, mainly form by handwheel (1), valve rod (3), upper valve body (7) and following valve body (13), it is characterized in that in the upper plenum of upper valve body (7), the outer cover of valve rod (3) is equipped with spring (6), the upper and lower end of spring (6) contacts with upper and lower spring seat (5) and (15) respectively, at upper spring seat (5) but the top be provided with the jump ring (4) of dogging on valve rod (3); Following cavity internal fixation at upper valve body (7) has taper sheath (8), is provided with the spherical stuffing box gland (9) of the effect of matching with taper sheath (8) in the bottom of valve rod (3).

2, internal sealed leakage-free valve as claimed in claim 1 is characterized in that being connected with spherical valve gap (12) in the lower end of valve rod (3) by screw rod (10), and spherical valve gap (12) is provided with guide pad (11).