CN101270828A

CN101270828A - Three-way ball valve

Info

Publication number: CN101270828A
Application number: CNA200810044395XA
Authority: CN
Inventors: 明赐东
Original assignee: SICHUAN HUALIN AUTO-CONTROL EQUIPMENT Co Ltd
Current assignee: SICHUAN HUALIN AUTO-CONTROL EQUIPMENT Co Ltd
Priority date: 2008-05-08
Filing date: 2008-05-08
Publication date: 2008-09-24

Abstract

The invention discloses a three-way ball valve, including a valve body, a valve seat, a valve core and a valve rod. The valve body has a medium inflow channel and two medium outflow channels. The internal orifice of each medium outflow channel is provided with the valve seat. The valve core is fixedly connected with the valve rod. The sealed working face of the valve core is a spherical surface, which corresponds to the valve seat. The valve core is a hemispheric spherical cap which has the spherical surface and a plane. The spherical surface is the sealed working face corresponding to the valve seat. The plane of the spherical cap has a handle which is provided with a pilot hole for connecting the valve rod. The invention has the beneficial technological effects that the medium channel does not run through the valve core and does not influence the path of the valve any more. The bulk of the valve is reduced and the medium can flow smoothly. The crystals and the solid impurities are taken out of the valve, which neither gather inside the valve and form stoppage nor enter into the matching surface of the ball core and the valve seat to form hard friction and destroy the seal.

Description

Tee ball valve

Technical field

The present invention relates to valve, specifically, is a kind of tee ball valve.

Background technique

Traditional tee ball valve, the medium runner on its spool is a through hole, the shape of through hole has two kinds, and the one, " L " shape, as shown in Figure 1, another kind is "T"-shaped, as shown in Figure 2, mainly has two problems:

First, because spool is spherical, medium runner will pass spool, therefore, the latus rectum of valve is determined by the through-hole diameter on the spool fully, limited by the ball valve core volume, the diameter of through hole can not be too big, and actual internal area is limited, the valve of a certain specific inside nominal diameter, the size of its valve body is big, and the material consumption is big, the cost height.

The second, the medium runner in the spool is 90 ° of racings, and resistance is big, and media flow is not smooth, and flow diminishes, and at feed flow, when pressure reduction is determined, needs the valve of the big specification of apolegamy, and is uneconomical.Especially, when being used for conveying easily-crystallized medium or containing the medium of solid impurity, crystallization or solid impurity accumulate in the corner of runner easily, result in blockage, and influence valve event even stuck and akinesia is accidents caused.Crystallization or solid impurity also can enter the fitting surface of ball core and valve seat, produce hard friction, destroy sealing, cause valves leakage, reduce the working life of valve.

In addition, traditional tee ball valve, its valve seat are conventional hard seal valve seats, and the sealing surface of spool, valve seat is wearing and tearing easily all, and working life is not long.

Summary of the invention

Purpose of the present invention provides a kind of tee ball valve that does not have above-mentioned shortcoming.

Technical solution of the present invention is:

A kind of tee ball valve comprises valve body, valve seat, spool, valve rod, and described valve body has a MEDIA FLOW stand in channel and two medium flow pass, and the internal orifice of each medium flow pass is respectively equipped with valve seat; Described spool is fixedlyed connected with described valve rod, and the sealed working face of spool is a sphere, the corresponding valve seat of sealing working surface; Described spool is hemispheric spherical crown, and this spherical crown has a sphere and a plane; This sphere is a sealed working face, corresponding valve seat; On the plane of spherical crown handle is arranged, be useful on the pilot hole that connects valve rod on the handle.

Described handle is positioned at the center on spherical crown plane, and described valve rod runs through the pilot hole of this handle, and is fixedly connected by link.

Also two of described handles, upper and lower layout on the spherical crown plane; Described valve rod also can be divided into upper and lower two sections, and the lower end of epimere places in the pilot hole of handle, and the upper end of hypomere places down in the pilot hole of handle, and it is fixedly connected all to pass through link.

Described spherical crown and handle are overall structures, also divide body structure.

Described valve seat is the elastic packing valve seat, and the seal operation of this valve seat partly is an elastic element, and the vertical sectional shape of this elastic element is " J " shape or serpentine.

Useful technique effect of the present invention:

Because spool is designed to the spherical crown shape, its essence has been the baffle-type valve, and medium runner no longer runs through valve core inside, no longer influences the latus rectum of valve, and the volume of valve reduces, and materials are economized, and cost is low.

Because spool is designed to the spherical crown shape, the flow channel space at place, spherical crown place is big, and media flow is unimpeded, and crystallization or solid impurity are taken out of outside the valve, can not accumulate in the valve to result in blockage, and the fitting surface that also can not enter ball core and valve seat produces hard friction, destroys sealing.

Because spool is designed to the spherical crown shape, its sealed working face remains sphere, has the equal sealing effect of ball valve core.

Because valve seat adopts the elastic packing valve seat, has further improved sealing effect, can satisfy VI level disconnect request.

Description of drawings

Fig. 1 is a kind of structural representation (" L " shape medium runner) of traditional tee ball valve

Fig. 2 is the another kind of structural representation ("T"-shaped medium runner) of traditional tee ball valve

Fig. 3 is a kind of structural representation (single handle single valve bar, the corresponding B channel status of spool) of this tee ball valve

Fig. 4 is the plan view of Fig. 3

Fig. 5 is the corresponding C-channel phase diagram of this tee ball valve spool

Fig. 6 is this tee ball valve B, the phase diagram of C-channel all-pass

Fig. 7 is the another kind of structural representation (double-handle single valve bar) of this tee ball valve

Fig. 8 is another structural representation (double-handle double stub shaft) of this tee ball valve

Embodiment

Referring to Fig. 3, Fig. 4: this tee ball valve comprises valve body 1, valve seat 3, spool 2, valve rod 4, and valve body 1 has a MEDIA FLOW stand in channel A and two media flow out channel B, C, and the internal orifice that medium flows out channel B, C is respectively equipped with valve seat 3 (3.1,3.2).

The characteristics of this tee ball valve are, spool 2 is designed to special construction, is made of spherical crown 2.1 and handle 2.2 two-part, and spherical crown 2.1 is hemispherical, has a sphere and a plane; This sphere is a sealed working face, corresponding valve seat 3; Handle 2.2 is positioned on the plane of spherical crown 2.1, and the global shape of spool 2 is " umbrella " shape, as shown in Figure 3.Be useful on the pilot hole that connects valve rod 4 on the handle 2.2, fixedly connected with valve rod 4 by link 7.

Spherical crown 2.1 can be an overall structure with handle 2.2, also divides body structure, integrally-built good rigidly, and rate of fault is low, but amount of finish is big, and material consumption is many, the cost height; Divide the body structure materials few, cost is low, but the poor rigidity of structure, rate of fault is higher, cuts both ways.

The working procedure of this valve is, when the corresponding B runner of spool 2, medium flows into from passage A, flows out through C-channel, as shown in Figure 4.When the corresponding C runner of spool 2, medium flows into from passage A, flows out through the B passage, as shown in Figure 5.When spool 2 was in neutral position, medium flowed into from passage A, flowed out from B, C-channel simultaneously, as shown in Figure 6.

Referring to Fig. 7: the handle 2.2 of spool 2 also can be established two, promptly goes up handle 2.2.1 and following handle 2.2.2, is positioned on the spherical crown plane, and upper and lower symmetric arrangement all is connected with valve rod 4, can improve the adhesive strength of spool 2 and valve rod 4 like this.

Referring to Fig. 8: when spool 2 adopts double-handles, but valve rod 4 is the design mix segment structure also, is divided into epimere 4.1, hypomere 4.2, and the lower end of valve rod epimere 4.1 places in the pilot hole of handle 2.2.1, the upper end of valve rod hypomere 4.2 places down in the pilot hole of handle 2.2.2, and it is fixedly connected all to pass through link 7; The upper end of epimere valve rod 4.1 connects the final controlling element of valve; The lower end of hypomere valve rod 4.2 is positioned at the positioning hole of valve body 1 bottom, is supported on the end cap (not shown) with this hole, and radially slides with positioning hole and to cooperate.Also can set up thrust-bearing in the hole, to improve the flexibility of spool 2 actions.

In addition, in order to improve the sealability of valve, valve seat 3 adopts the elastic packing valve seat, the seal operation of this valve seat 3 partly is an elastic element, the vertical sectional shape of this elastic element is " J " shape or serpentine, utilizes the universal yielding characteristic of this elastic element, when the sphere of spool 2 contacts with this elastic element, all the time can form complete sealing contour, have excellent sealing performance." J " shape has a resilient deformation section, and serpentine has two resilient deformation section, and sealability is better.Shown in this routine accompanying drawing is " J " shape valve seat.

Claims

1. a tee ball valve comprises valve body, valve seat, spool, valve rod, and described valve body has a MEDIA FLOW stand in channel and two medium flow pass, and the internal orifice of each medium flow pass is respectively equipped with valve seat; Described spool is fixedlyed connected with described valve rod, and the sealed working face of spool is a sphere, the corresponding valve seat of sealing working surface; It is characterized in that: described spool is hemispheric spherical crown, and this spherical crown has a sphere and a plane; This sphere is a sealed working face, corresponding valve seat; On the plane of spherical crown handle is arranged, be useful on the pilot hole that connects valve rod on the handle.

2. tee ball valve according to claim 1 is characterized in that: described handle is positioned at the center on spherical crown plane, and described valve rod runs through the pilot hole of this handle, and is fixedly connected by link.

3. tee ball valve according to claim 1 is characterized in that: described handle is two, upper and lower layout on the spherical crown plane; Described valve rod is divided into upper and lower two sections, and the lower end of epimere places in the pilot hole of handle, and the upper end of hypomere places down in the pilot hole of handle, and it is fixedly connected all to pass through link.

4. according to claim 1 or 2 or 3 described tee ball valves, it is characterized in that: described spherical crown and handle are overall structures, or divide body structure.

5. tee ball valve according to claim 1 is characterized in that: described valve seat is the elastic packing valve seat, and the seal operation of this valve seat partly is an elastic element, and the vertical sectional shape of this elastic element is " J " shape or serpentine.