CN2205893Y - Stop valve - Google Patents

Abstract

The utility model relates to a stop valve in particular adapts for high temperature and pressure operating condition and it adopts a valve flap and a valve base made of ceramic material. And the bulb valve flap is lifted on a valve handle by a valve flap liner; the valve base is installed in the valve body by a valve base liner and a valve plug. The structure not only solves the problem how the ceramic material valve flap and the valve base are respectively installed on the valve handle and the valve body, but also it is simple and reliable in structure and convenient in manufacture. Furthermore, the ceramic material not only resists high-temperature high voltage, but also resists degradation from high-temperature high pressure fluid medium, wear-out and cavitation. Therefore, it increases the service life of the stop valve.

Description

Stop valve

The utility model relates to a kind of stop valve, particularly is operated in the stop valve under the high temperature and high pressure condition.

The flap of stop valve and valve seat are in washing away of flowing medium, work under the operating mode of wearing and tearing and cavitation, therefore the damage of flap and valve seat is than very fast, for the stop valve that bears High Temperature High Pressure, the damaged condition of its flap and valve seat is just more serious, the measure of taking at present is the contact surface pile-up welding hard alloy material at flap and valve seat, but, overlay cladding is influenced by bead-welding technology with the combination force of matrix very big, after the overlay cladding shaping, the very thin thickness of its overlay cladding, and thickness distribution is inhomogeneous, therefore, though this measure is to there being effect the service time that prolongs flap and valve seat, the actual use proves that this stop valve also can only use the several months promptly will scrap.

The purpose of this utility model provides can satisfy stop valve flap, valve seat advance material requirement, easily manufactured, long service life on a kind of structure.

The structure characteristic of this stop valve is that the spherical flap of pottery is sleeved on lower port diameter less than the flap diameter, in the endoporus of upper end with the flap sleeve of valve rod connection, the valve seat of pottery is fixed in the endoporus of periphery with the valve sleeve of valve body taper fit, and the bottom surface of this valve sleeve is supported by the valve plug that is fixed in the valve body.

Further illustrate detailed content of the present utility model below in conjunction with drawings and Examples.

Accompanying drawing is a structural drawing of the present utility model.

As shown in the figure, the described stop valve of present embodiment is made up of members such as valve body 1, flap 2, valve seat 3, valve rod 4, filler 5, Gland 6, Stem Mut 7 and handwheels 8, wherein the spherical flap 2 of pottery is sleeved in the endoporus of the flap sleeve 9 that lower port diameter connects with valve rod 4 less than the diameter of flap 2, upper end, the valve seat 3 of pottery is sleeved in the endoporus of periphery with the valve sleeve 10 of valve body 1 taper fit, and the bottom surface of this valve sleeve is supported by the valve plug 11 that is fixed in the valve body 1.Above-mentioned flap sleeve 9 is with the Placement of valve rod 4, suit mode and valve plug 11 the means of fixation valve body 1 in of valve seat 3 in valve sleeve 10 is diversified, present embodiment is in the following way: flap sleeve 9 is threaded with valve rod 4, and spot welding then forms non-disconnectable connection; Valve seat 3 forms the multidiameter shaft shape, is sleeved in the shoulder hole of valve sleeve 10; Valve plug 11 at first is threaded with valve body 1, and welding is fixing then.In addition, can fill up the softer metallic shim 12 and 13 of material at the shaft shoulder place of valve seat 3 and the bottom surface of valve sleeve 10, in case valve seat 3 pressurizeds of pottery break.

After making flap and valve seat with stupalith, flap and valve seat can not only high temperature high voltage resistants, and ability high temperature and high pressure flow body medium is to its wash away, wearing and tearing and cavitation, thereby improved the working life of stop valve, and structure described in the utility model has not only properly solved the flap of pottery and the valve seat installation question on valve rod and valve body respectively, and this simple and reliable for structure, it is also convenient to make.

Claims (5)

1, a kind of stop valve, have valve body, flap, valve seat and valve rod, it is characterized in that: the spherical flap (2) of pottery is sleeved in the endoporus of lower port diameter less than the flap sleeve (9) of the same valve rod in diameter, upper end (4) connection of flap (2), the valve seat of pottery (3) is sleeved in the endoporus of valve sleeve (10) of the same valve body of periphery (1) taper fit, and the bottom surface of this valve sleeve (10) is supported by the valve plug (11) that is fixed in the valve body (1).

2, stop valve according to claim 1 is characterized in that: the same valve rod of flap sleeve (9) (4) is threaded, and adds the spot welding welding.

3, stop valve according to claim 1 and 2 is characterized in that: valve seat (3) becomes the multidiameter shaft shape, is sleeved in the shoulder hole of valve sleeve (10).

4, stop valve according to claim 1 and 2 is characterized in that: the same valve body of valve plug (11) (1) is threaded, and it is fixing to add welding.

5, stop valve according to claim 3 is characterized in that: the same valve body of valve plug (11) (1) is threaded, and it is fixing to add welding.

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