CN206522456U

CN206522456U - Double eccentric butterfly valve

Info

Publication number: CN206522456U
Application number: CN201720107101.8U
Authority: CN
Inventors: 刘仁安; 刘新宇; 朱磊
Original assignee: Shanghai Anfa Flow Control Co Ltd
Current assignee: Safety valve fluid control (Shanghai) Co.,Ltd.
Priority date: 2017-02-04
Filing date: 2017-02-04
Publication date: 2017-09-26
Anticipated expiration: 2027-02-04

Abstract

A kind of double eccentric butterfly valve, includes being provided with valve plate in the valve body of inner hollow, valve body, valve plate is fixedly installed on the periphery wall of a valve rod, and the upper end of valve rod protrudes from valve body, and the lower end of valve rod is arranged on the inside of valve body, connection is rotated between valve rod and valve body, valve rod is used for the opening and closing for controlling valve plate；The upper end of valve rod rotates the position being connected with valve body and is provided with upper sealing structure, upper sealing structure includes bushing and clutch shaft bearing, bushing is arranged on the surface of clutch shaft bearing, and bushing and clutch shaft bearing are set on the periphery wall of valve rod upper end, and bushing and clutch shaft bearing are embedded in the top of valve body；The lower end of valve rod rotates the position being connected with valve body and is provided with lower sealing structure, and lower seal includes a second bearing, and second bearing is set on the periphery wall of valve rod lower end, and second bearing is embedded in the bottom of valve body；The valve seat of annular is installed with the flange face of valve body；Bushing realizes butterfly valve and sealed with outside, reduces torsion required when butterfly valve is closed.

Description

Double eccentric butterfly valve

Technical field

The utility model is related to a kind of double eccentric butterfly valve.

Background technology

Existing double eccentric butterfly valve, the structure typically used is to install common axle sleeve in axis hole up and down, and this structure exists Have in the industrial and mineral of granule medium in use, particulate matter easily enters stem guiding Bearing inner, so as to cause butterfly valve is stuck to show As.

In addition, the two ends of butterfly valve all add flange gasket when existing double eccentric butterfly valve and the connection of industrial pipeline flange, Flange gasket is easily lost, and also add the use cost of butterfly valve.

In addition, after existing double eccentric butterfly valve mainly realizes that sealing, valve are opened by the way of plane is fitted with plane Particulate matter in medium is easily attached on sealing surface, and particulate matter be attached on sealing surface after can also gradually accumulate, so Medium still can be from the gap leakage between the surface of two laminatings, so as to influence the sealing of whole butterfly valve after butterfly valve is closed.

In addition, existing double eccentric butterfly valve upper end typically uses packing seal, this sealing means to turn butterfly Torsion required for valve becomes big, is sent out if being not enough easily caused situation about being let out in valve when using to the pretightning force that valve applies It is raw.

Utility model content

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art that there is provided a kind of double eccentric butterfly valve.

The utility model is achieved in that a kind of double eccentric butterfly valve, includes setting in the valve body of inner hollow, the valve body There is valve plate, the valve plate is fixedly installed on the periphery wall of a valve rod, the upper end of the valve rod protrudes from the valve body, the valve The lower end of bar is arranged on the inside of the valve body, and connection is rotated between the valve rod and the valve body, and the valve rod is used to control The opening and closing of the valve plate；The upper end of the valve rod rotates the position being connected with the valve body and is provided with upper sealing structure, institute Sealing structure is stated including bushing and clutch shaft bearing, the bushing is arranged on the surface of the clutch shaft bearing, the bushing and Clutch shaft bearing is set on the periphery wall of the valve rod upper end, and the bushing and clutch shaft bearing are embedded in the upper of the valve body Portion；The lower end of the valve rod and the valve body rotate position be connected and are provided with lower sealing structure, and the lower seal includes one the Two bearings, the second bearing is set on the periphery wall of valve rod lower end, and the second bearing is embedded in the valve body Bottom；The valve seat of annular is installed with the flange face of the valve body.

Further, the lower end of the clutch shaft bearing, which is provided with first annular groove, the first annular groove, is provided with first axle Hold sealing ring；The upper end of the second bearing, which is provided with the second annular groove, second annular groove, is provided with second bearing sealing ring.

Further, the outer peripheral edge of the valve plate is provided with arc-shaped convex, and the arc-shaped convex is used to close in butterfly valve When closely abutted with the inwall of valve seat.

Further, it is arranged with the valve seat on the left of vulcanization rubber sleeve, the vulcanization rubber sleeve and protrudes from valve body Flange face.

Further, the clutch shaft bearing and second bearing are lined with polytetrafluoroethylene (PTFE) set.

Bushing on the double eccentric butterfly valve that the utility model is provided, valve rod instead of traditional packing seal, both realize Butterfly valve is sealed with outside, and torsion required when butterfly valve is closed is reduced again（Pretightning force）, it is to avoid when butterfly valve is closed human hand or The torsion that person's control device applies to valve rod（Pretightning force）Not enough cause butterfly valve can not normal switching-off and cause medium in butterfly valve The phenomenon of portion's leakage；Clutch shaft bearing sealing ring and second bearing sealing ring can avoid particulate matter and impurity enter clutch shaft bearing and Second bearing, so allowing for the butterfly valve can make under the more industrial and mineral environment of particulate matter or the more Sewage Environment of impurity With so as to expand the use scope of the butterfly valve.

Brief description of the drawings

In order to illustrate more clearly of the technical solution of the utility model, below by the required accompanying drawing used in embodiment It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present utility model, for ability For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached Figure.

Fig. 1 is the sectional view for the double eccentric butterfly valve that the utility model embodiment is provided.

Fig. 2 is the enlarged drawing at A in Fig. 1.

Fig. 3 is the enlarged drawing at B in Fig. 1.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe.

As shown in figure 1, a kind of double eccentric butterfly valve that the utility model embodiment is provided, includes the valve body 1 of inner hollow, valve Valve plate 2 is provided with body 1, valve plate 2 is fixedly installed on the periphery wall of a valve rod 3, and the upper end of valve rod 3 protrudes from valve body 1, valve rod 3 Lower end be arranged on the inside of valve body 1, rotate connection between valve rod 3 and valve body 1, what valve rod 3 was used to controlling valve plate 2 beats on and off Close；The upper end of valve rod 3 and valve body 1 rotate position be connected and are provided with upper sealing structure 4, and upper sealing structure 4 includes bushing 41 and the One bearing 42, bushing 41 is arranged on the surface of clutch shaft bearing 42, and bushing 41 and clutch shaft bearing 42 are set in the outer of the upper end of valve rod 3 On perisporium, and bushing 41 and clutch shaft bearing 42 are embedded in the top of valve body 1；The lower end of valve rod 3 rotates the position being connected with valve body 1 Lower sealing structure 5 is installed, lower seal includes a second bearing 51, and second bearing 51 is set in the periphery wall of the lower end of valve rod 3 On, and second bearing 51 is embedded in the bottom of valve body 1；Be installed with the valve seat 6 of annular on the flange face of valve body 1, valve plate 2 with Valve seat 6 realizes the closing of butterfly valve after abutting.

As shown in Figures 2 and 3, further, the lower end of the clutch shaft bearing 42 is provided with first annular groove（It is not shown）, the Clutch shaft bearing sealing ring 43 is provided with one annular groove, clutch shaft bearing sealing ring 43 can prevent the particulate matter and impurity inside medium The stuck situation of clutch shaft bearing 42 is caused to occur in into clutch shaft bearing 42；The upper end of second bearing 51 is provided with the second annular groove （It is not shown）, the second annular groove is interior to be provided with second bearing sealing ring 52, and second bearing sealing ring 52 can prevent in medium Grain thing and impurity, which enter the situation for causing second bearing 51 stuck in second bearing 51, to be occurred；This ensures that valve rod 3 is rotated It is smooth, so as to realize smooth opening and the closing of valve plate 2.

Further, the outer peripheral edge of the valve plate 2 is provided with arc-shaped convex 21, and arc-shaped convex 21 is used to close in butterfly valve When closely abutted with the inwall of valve seat 6；Because the surface of arc-shaped convex 21 is cambered surface, the particulate matter and impurity inside medium are difficult Adhere in arc-shaped convex 21, this ensures that sealing during butterfly valve closing between valve plate 2 and valve seat 6 is good.

Further, vulcanization rubber sleeve 61 is arranged with the valve seat 6, in the present embodiment, vulcanization rubber sleeve 61 be it is U-shaped, The left side of vulcanization rubber sleeve 61 protrudes from the flange face of valve body 1, is avoided the need for during the flange connection of such butterfly valve and external pipe Install flange gasket additional, on the one hand reduce the use cost of butterfly valve, on the other hand it also avoid the situation of flange gasket loss.

Further, the clutch shaft bearing 42 and the equal inner liner polytetrafluoroethylene of second bearing 51（PTFE）Set（It is not shown）； Polytetrafluoroethylene (PTFE)（PTFE）Set enhances the wearability of clutch shaft bearing 42 and second bearing 51, is easy to improve the use of whole butterfly valve Life-span.

Bushing 41 on the double eccentric butterfly valve that the utility model is provided, valve rod 3 instead of traditional packing seal, both realize Butterfly valve is sealed with outside, again reduces torsion required when butterfly valve is closed（Pretightning force）, it is to avoid human hand when butterfly valve is closed Or the torsion that control device applies to valve rod 3（Pretightning force）Not enough cause butterfly valve can not normal switching-off and cause medium in butterfly valve The phenomenon of internal leakage；Clutch shaft bearing sealing ring 43 and second bearing sealing ring 52 can avoid particulate matter and impurity from entering first Bearing 42 and second bearing 51, so allowing for the butterfly valve can be in the more industrial and mineral environment of particulate matter or the more dirt of impurity Used under water environment, so as to expand the use scope of the butterfly valve.

Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and moistened Decorations are also considered as protection domain of the present utility model.

Claims

1. valve plate, the valve are provided with a kind of double eccentric butterfly valve, it is characterised in that the valve body including inner hollow, the valve body Plate is fixedly installed on the periphery wall of a valve rod, and the upper end of the valve rod protrudes from the valve body, and the lower end of the valve rod is set Connection is rotated between the inside of the valve body, the valve rod and the valve body, the valve rod is used to control beating for the valve plate It is open and close；The upper end of the valve rod rotates the position being connected with the valve body and is provided with upper sealing structure, the upper sealing structure Including bushing and clutch shaft bearing, the bushing is arranged on the surface of the clutch shaft bearing, and the bushing and clutch shaft bearing are arranged On the periphery wall of the valve rod upper end, and the bushing and clutch shaft bearing are embedded in the top of the valve body；The valve rod Lower end and the valve body rotate position be connected and be provided with lower sealing structure, the lower seal includes a second bearing, described Second bearing is set on the periphery wall of valve rod lower end, and the second bearing is embedded in the bottom of the valve body；The valve The valve seat of annular is installed with the flange face of body.

2. double eccentric butterfly valve according to claim 1, it is characterised in that the lower end of the clutch shaft bearing is provided with first annular Clutch shaft bearing sealing ring is provided with groove, the first annular groove；The upper end of the second bearing is provided with the second annular groove, described the Second bearing sealing ring is provided with second ring groove.

3. double eccentric butterfly valve according to claim 1, it is characterised in that the outer peripheral edge of the valve plate is convex provided with circular arc Rise, the arc-shaped convex is used to closely abut with the inwall of valve seat when butterfly valve is closed.

4. double eccentric butterfly valve according to claim 1, it is characterised in that vulcanization rubber sleeve, institute are arranged with the valve seat State the flange face that valve body is protruded from the left of vulcanization rubber sleeve.

5. double eccentric butterfly valve according to claim 1, it is characterised in that the clutch shaft bearing and second bearing are lined with Polytetrafluoroethylene (PTFE) set.