CN2821320Y

CN2821320Y - Fluorine lined three-way lock valve

Info

Publication number: CN2821320Y
Application number: CN 200520107320
Authority: CN
Inventors: 朱孝有
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-24
Filing date: 2005-05-24
Publication date: 2006-09-27
Anticipated expiration: 2015-05-24

Abstract

The utility model relates to a fluorine lined three-way cock valve which is provided with a valve body (1) and a valve cover (8), wherein a T-shaped three-way flow passage (11) is arranged in the valve body (1), the junction part of the three-way flow passage is provided with a tapered plug seat (12) which is vertical to the plane in which three flow passages after the tapered plug seat passing through the three-way flow passage; a tapered plug body (2) is inserted in the plug seat, and a sealable sliding fit is formed between the side surface of the plug body (2) and the side surface of the plug seat. The plug body is provided with a T-shaped three-way hole (21) at the part corresponding to the three-way flow passage; the width of a vertical hole (211) of the T-shaped three-way hole, which is relative to a blind position (22), is larger than the diameter of any one of the flow passages of the three-way flow passage, and the surface of an inner cavity of the valve directly contacting a medium of a pipeline is provided with a fluorine plastic layer (3). The plug valve can conveniently convert the flow direction of the medium, and can be used for strong corrosive media, such as strong acid media, strong alkali media, salt, strong oxidant, strong reductant, organic solvent, etc.

Description

Fluorine lining threeway plug valve

Technical field

The utility model relates to a kind of valve, particularly a kind of Fluorine lining threeway plug valve.

Background technique

Threeway plug valve in the market belongs to the metal threeway plug valve substantially, and antiseptic property is poor, can not be used for the media such as acid, alkali, salt and oxygenant, reducing agent, organic solvent of high concentration, exists and uses narrow limitation.

The metal threeway plug valve normally presses plain cushion by valve gap, and then compresses cock body, and during cock body, the frictional force between plain cushion and the cock body is bigger in rotation, so resistance is bigger during switch.

Summary of the invention

The technical problems to be solved in the utility model is that the antiseptic property of existing threeway plug valve is relatively poor, so provide a kind of antiseptic property good Fluorine lining threeway plug valve.Preferred version of the present utility model further provides a kind of Fluorine lining threeway plug valve of good seal performance also at the relatively poor problem of threeway plug valve sealability in the prior art.

In order to achieve the above object, a kind of Fluorine lining threeway plug valve of the present utility model, be provided with valve body, valve gap, in described valve body, be shaped on T shape threeway runner, the intersection of passing this threeway runner is shaped on the taper obturating plug perpendicular to plane, three runner places, described obturating plug is opened on the upper end of valve body, in described obturating plug, insert the conical plug body, form sealable being slidingly matched between cock body side surface and the obturating plug side surface, on cock body, have T shape three through holes with the corresponding position of described threeway runner, the width of the blind position relative with upright opening in T shape three through holes is greater than the diameter of arbitrary runner in the threeway runner, valve gap is installed in the top of valve body and cock body, between valve gap and valve body and cock body sealing mechanism is set, with valve cavity surface that the pipeline medium directly contacts on be shaped on fluoroplastics layer.

According to Fluorine lining threeway plug valve of the present utility model, the structure of sealing mechanism can be: the top of cock body is shaped on the cylindrical stopper rod of reduced, the cock body upper-end surface is a sealing surface one, and the upper surface that is positioned at the valve body in the outside on the obturating plug is as sealing surface two, stopper rod bottom outer side surface is as sealing surface three, on sealing surface one, place the axle collar, between the described axle collar and the stopper rod slit is arranged, between the axle collar and stopper rod, along the outer surface of the axle collar,, on sealing surface two, place annular integral sealing pad through sealing surface one, above annular integral sealing pad, place the metallic support pad, the valve gap that compresses sealing mechanism is set on described metallic support pad.

Fluorine lining threeway plug valve of the present utility model, opening and closing need only 90 ° of rotatable handles, and just the medium in the pipeline is connected or blocked to the flow direction of convertible medium.Owing to be provided with the good fluoroplastics layer of antiseptic property as lining, so can be used for the medium such as strong acid, highly basic, salt and strong oxidizer, strong reductant, organic solvent of various concentration, be applicable in the serious pipeline of corrosivity such as chemical industry, oil, agricultural chemicals, pharmacy, dyestuff, military project, flow to as transfer medium, connect or block the pipe fitting of medium.

Fluorine lining threeway plug valve of the present utility model, owing to adopted the sealing mechanism of special construction, operation is light, sealability stable, friction is little, advantages such as long service life so have.

Description of drawings

Fig. 1 represents the vertical structural representation that partly cuts open of the utility model embodiment's threeway plug valve;

Fig. 2 represents the cross-sectional structural representation of the utility model embodiment's threeway plug valve;

The partial enlarged drawing at A place in Fig. 3 presentation graphs 1.

Embodiment

With reference to accompanying drawing, will be described in detail embodiment of the present utility model.

Novel Fluorine lining threeway plug valve of the present utility model, as Fig. 1, shown in Figure 2, be provided with valve body 1, valve gap 8 and cock body 2 are shaped on T shape threeway runner 11 in the described valve body 1, the intersection of passing this threeway runner 11 is shaped on the taper obturating plug 12 perpendicular to plane, three runner places, described obturating plug 12 is opened on the upper end of valve body 1, and the lower end of obturating plug 12 is positioned at 11 belows, three-way flow road.In described obturating plug 12, insert conical plug body 2, form sealable being slidingly matched between cock body 2 side surfaces and obturating plug 12 side surfaces,,, just can obtain excellent sealing performance as long as impose on the less seal pressure of cock body 2 owing to the fluoroplastic friction factor is less., on cock body 2, can have T shape three through holes 21 with described threeway runner 11 corresponding positions, that is: the lower end of cock body 2 is positioned at the below in three-way flow road 11, and T shape three through holes 21 are positioned at the middle part of cock body 2.Do not have the position and the obturating plug 12 in hole to form sealable being slidingly matched on cock body 2, when described cock body 2 rotated, three holes of described T shape three through holes 21 can be connected with three runners of threeway runner 11 respectively, form three-way valve; When a certain runner is blocked in the blind position 22 relative with upright opening 211, just become the Twoway valves of direct current or dihedral runner, require the diameter of the width of blind position 22 this moment, so when fluid switched, operation was very convenient greater than arbitrary runner in the threeway runner 11.Its cock body 2 is direct-insert from the obturating plug opening of valve body 1 upper end, and the valve gap 8 fastening tops that are installed in valve body 1 and cock body 2 are provided with sealing mechanism between its door.

Threeway runner 11 internal surfaces at above threeway plug valve, and on the inner and outer surface of cock body 2, and equal cylinder-packing fluoroplastics layer 3 on the internal surface of obturating plug 12, promptly be equipped with fluoroplastics layer as lining with valve cavity that the pipeline medium directly contacts, like this, but just form the novel Fluorine lining threeway plug valve of the media such as acid, alkali, salt and oxygenant, reducing agent, organic solvent of resisting high-concentration.This fluoroplastics layer 3 is to adopt isotactic pressing technology to be machined directly to the valve cavity surface, and fluoroplastics layer 3 combines very tight with valve surface.

The material of above-mentioned fluoroplastics layer 3 can be teflon (F4), perfluoroethylene-propylene (F46), and perhaps Meltability polytetrafluorethyletubular (PFA), or other can corrosion resistant fluoroplastic.

Above novel Fluorine lining threeway plug valve, the structure of the sealing mechanism between valve gap 8, valve body 1 and the cock body 2 can be as shown in Figure 3: the top of cock body 2 is shaped on the cylindrical stopper rod 22 of reduced, cock body upper-end surface between cock body 2 and the stopper rod 22 is as sealing surface 1, and the upper-end surface that is positioned at the valve body 1 outside obturating plug 12 upper ends is as sealing surface 2 24, and described sealing surface 1 is preferably on the same horizontal plane with sealing surface 2 24; The outer side surface of stopper rod 22 bottoms is as sealing surface 3 25, on sealing surface 1, place the axle collar 41, between the described axle collar 41 and the stopper rod 22 slit is arranged, from between the axle collar 41 and stopper rod 22, along the outer surface of the axle collar 41 to sealing surface 1, on sealing surface 2 24, place annular integral sealing pad 42, if the shape of cross section of axle collar right-angled triangle as shown in Figure 3, the shape of so described integral sealing pad 42 is: the outside places the plain cushion 421 of sealing surface 1 and sealing surface 2 24 tops, the inboard is the reversed V-shape pad 422 that covers the axle collar 41, like this, the upper surface of the axle collar 41 also is a sealing surface.Flat endless metal diaphragm 43 is set above plain cushion 421, valve gap 8 is pressed on the endless metal diaphragm 43, valve gap 8 can be connected with valve body 1 by screw, when tightening screw, compress annular metal diaphragm 43, further compress plain cushion 421 on sealing surface 1 and sealing surface 2 24, along its inclined-plane cross section being set above reversed V-shape pad 422 outsides is trapezoidal endless metal spacer 44, the inclined-plane of metallic adjusted pad 44 contacts with the inclined-plane of reversed V-shape pad 422, metallic adjusted pad 44 upper surfaces are levels, be fixed by a plurality of screws 45 of marking closely on the valve gap 8 on it, such sealing mechanism is because sealing surface is provided with the axle collar 41, so when cock body 2 rotates, cock body 2 is less with the surface of contact of sealing gasket, so resistance is less, makes valve Paint Gloss when rotated.

The above-mentioned axle collar 41, integral sealing pad 42 preferably are polytetrafluoroethylmaterial material and make, and so also are for advantages of good anticorrosion performance.

The shape of cross section of the described axle collar also can be other shapes, such as: rectangle, trapezoidal etc., shape with the contacted integral sealing pad of the axle collar, also will be and change along with the change in shape of the cross section of the axle collar, this integral sealing pad will contact fully with axle collar outer surface, plays seal action.

In order further to reduce resistance, as shown in Figure 3, the conical surface 231 under oblique is preferably made in the outer ring of described sealing surface 1, does not contact between this conical surface 231 and the plain cushion 421.

For enhanced leaktightness, as shown in Figure 3, the lower surface of described valve gap 8 can be made convex surface, with sealing surface 2 24 corresponding positions on be shaped on annular protrusion 81, like this when compressing valve gap 8, make the sealing intensity between projection 81 and the sealing surface 2 24 bigger.

The upper end of stopper rod 22 can connect handle 4 by screw, rotates cock body 2 by handle with sleeve 4.Opening and closing need only 90 ° of rotatable handles, and just the medium in the pipe pipeline is connected or blocked to the flow direction of convertible medium.

For enhanced leaktightness, preferably 2-5 ° of the cone angle of described taper cock body 2, the cone angle of obturating plug 12 is identical with the cone angle of cock body 2.

In order to prevent the damage valve that expands with heat and contract with cold, between described cock body 2 lower ends and obturating plug 12 bottom surfaces distance is arranged.

Certainly, described sealing surface 1 can be on same horizontal plane with sealing surface 2 24; Described like this plain cushion 421 and compress annular metal diaphragm 43 and just need several angle or step is to adapt to this difference.

Described annular integral sealing pad 42 also can be a plain cushion, is shaped to needed shape when compressing when cock body 2 is installed.

Described endless metal diaphragm 43 and metallic adjusted pad 44, it is the metallic support pad that is used for when compressing sealing gasket, so its structure also can be an one, its shape will differently according to the shape of sealing surface design accordingly, and the effect of valve gap 8 mainly is that sealing mechanism is compressed, and fixed valve body and cock body, the above-mentioned screw 45 of marking closely also can be the part of valve gap 8, also can adopt other to compress mode and realize this function.

Claims

1, a kind of Fluorine lining threeway plug valve, be provided with valve body (1), valve gap (8), in described valve body (1), be shaped on T shape threeway runner (11), the intersection of passing this threeway runner (11) is shaped on the taper obturating plug (12) perpendicular to plane, three runner places, described obturating plug (12) is opened on the upper end of valve body (1), in described obturating plug (12), insert conical plug body (2), form sealable being slidingly matched between cock body (2) side surface and obturating plug (12) side surface, on cock body (2), can have T shape three through holes (21) with the corresponding position of described threeway runner (11), the width of the blind position (22) relative with upright opening (211) in T shape three through holes (21) is greater than the diameter of arbitrary runner in the threeway runner (11), valve gap (8) is installed in the top of valve body (1) and cock body (2), sealing mechanism is set between them, it is characterized in that, be shaped on fluoroplastics layer (3) with valve cavity surface that the pipeline medium directly contacts.

2, Fluorine lining threeway plug valve according to claim 1 is characterized in that, described fluoroplastics layer (3) is a polytetrafluoroethylene floor, or the perfluoroethylene-propylene layer.

3, Fluorine lining threeway plug valve according to claim 1, it is characterized in that, the structure of sealing mechanism is: the top of cock body (2) is shaped on the cylindrical stopper rod (22) of reduced, the cock body upper-end surface is a sealing surface one (23), and the upper surface that is positioned at the valve body in the outside on the obturating plug (12) is as sealing surface two (24), stopper rod (22) bottom outer side surface is as sealing surface three (25), go up the placement axle collar (41) at sealing surface one (23), between the described axle collar (41) and the stopper rod (22) slit is arranged, between the axle collar (41) and stopper rod (22), outer surface along the axle collar (41), through sealing surface one (23), go up placement annular integral sealing pad (42) until sealing surface two (24), place metallic support pad, the valve gap (8) of the sealing mechanism that on described metallic support pad, is fixed and clamped in annular integral sealing pad (42) top.

4, Fluorine lining threeway plug valve according to claim 3 is characterized in that, the described axle collar (41) is the teflon axle collar, and described annular integral sealing pad (42) is a polytetrafluoroethylene sealing gasket.

5, Fluorine lining threeway plug valve according to claim 4 is characterized in that, described sealing surface one (23) and sealing surface two (24) are on same horizontal plane.

6, Fluorine lining threeway plug valve according to claim 5, it is characterized in that, the shape of cross section of the described axle collar (41) is a right-angled triangle, being shaped as of described integral sealing pad (42): the outside is the plain cushion (421) that places sealing surface one (23) and sealing surface two (24) tops, the inboard is the reversed V-shape pad (422) that covers the axle collar (41), in plain cushion (421) top flat endless metal diaphragm (43) is set, valve gap (8) is pressed on the endless metal diaphragm (43), along its inclined-plane cross section being set in top, reversed V-shape pad (422) outside is trapezoidal endless metal spacer (44), the inclined-plane of metallic adjusted pad (44) contacts with the inclined-plane of reversed V-shape pad (422), metallic adjusted pad (44) upper surface is a level, is fixed by a plurality of screws (45) of marking closely on the valve gap (8) on it.

7, Fluorine lining threeway plug valve according to claim 6 is characterized in that, the outer ring of sealing surface one (23) make under oblique with the discontiguous conical surface of plain cushion (421) (231).

8, Fluorine lining threeway plug valve according to claim 7 is characterized in that, the lower surface of described valve gap (8), with sealing surface two (24) corresponding positions on be shaped on annular protrusion (81).

9, Fluorine lining threeway plug valve according to claim 8 is characterized in that, between described cock body (2) lower end and obturating plug (12) bottom surface distance is arranged.

According to the arbitrary described Fluorine lining threeway plug valve of claim 1 to 9, it is characterized in that 10, the cone angle of taper cock body (2) is 2-5 °.