CN2331798Y

CN2331798Y - Butterfly valve

Info

Publication number: CN2331798Y
Application number: CN 98223973
Authority: CN
Inventors: 葛信达
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-05-07
Filing date: 1998-05-07
Publication date: 1999-08-04
Anticipated expiration: 2008-05-07

Abstract

The utility model provides a butterfly valve. The valve rod part is sealed by making use of the combined action of a butterfly plate lining layer, a valve body lining layer, an upper filler and a lower filler; thus, the sealing effect is obviously strengthened. Meanwhile, because the lengths of the nonmetal sealing elements of the sealing part of a valve rod at the axial direction of the valve part are all short, the radical force which acts on the valve rod is mainly transferred to the valve rod by an upper pressing sleeve and a lower pressing sleeve; thus, the utility model has good rigidity.

Description

Butterfly valve

The utility model relates to a kind of valve, refers more particularly to the seal arrangement of valve.

The valve rod position seal arrangement of existing lining fluorine butterfly valve mainly is made of butterfly plate backing layer between valve rod and the valve body and valve body backing layer, in addition between upper valve rod and valve body, filler on the position also is provided with above the valve body backing layer, this seal arrangement is owing to mainly cooperate the realization sealing by butterfly plate backing layer and valve body backing layer, shortcoming with sealing effect heterodyne, because of the radial force on the valve rod mainly reaches upward packing support plate by butterfly plate backing layer, the valve body backing layer at valve rod position, has the shortcoming of poor rigidity simultaneously.

Better rigidity butterfly valve when the purpose of this utility model provides a kind of good seal performance and valve rod and is subjected to radial force.

To achieve these goals, technical solution of the present utility model is such: butterfly valve mainly comprises upper valve rod, valve body, butterfly plate, lower valve rod, the valve body backing layer, butterfly body backing layer etc., wherein between near the upper valve rod at butterfly plate place and valve body, be provided with the butterfly plate backing layer from inside to outside, last filler, the valve body backing layer, and the butterfly plate backing layer at this position, last filler, the valve body backing layer, length on the upper valve rod axial direction is all shorter, what last filler bottom contacted is the part of valve body backing layer, between near the lower valve rod at butterfly plate place and valve body, be provided with the butterfly plate backing layer from inside to outside, following filler, the valve body backing layer, and the butterfly plate backing layer at this position, following filler, the valve body backing layer, length on the lower valve rod axial direction is all shorter, what following filler top contacted is the part of valve body backing layer, the below of the top of last filler and following filler is being provided with respectively goes up gland and following gland, side contacts mainly is upper valve rod in the last gland, outer side contacts mainly be valve body, the inboard contact of following gland mainly be lower valve rod, outer side contacts mainly be valve body.

Because the sealing at valve rod position realizes by the acting in conjunction of butterfly plate backing layer, valve body backing layer, last filler or following filler in the above-mentioned technical solution, sealing effect is obviously strengthened, simultaneously because the length of nonmetal Sealing on the valve rod axial direction at valve stem seal position is all shorter, radial force suffered on the valve rod mainly is delivered on the valve body by last gland and following gland, so rigidity is better.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is the utility model embodiment's a configuration diagram.

Fig. 2 is the enlarged view of position shown in the circle among Fig. 1.

Wherein: 1. upper valve rod; 2. upper press cover; 3. go up gland; 4. valve body; 5. go up filler; 6. butterfly plate backing layer; 7. valve body backing layer; 8. descend filler; 9. lower valve rod; 10 times glands; 11. lower cover; 12. butterfly plate.

As shown in the figure, butterfly valve comprises valve body 4 and butterfly plate 12, butterfly plate 12 is installed on the valve body 4 by upper valve rod 1 and lower valve rod 9, valve body 4 inboards are provided with valve body backing layer 7, butterfly plate 12 outsides are provided with butterfly plate backing layer 6, between near butterfly plate 12 place's upper valve rods 1 and valve body 4, be provided with butterfly plate backing layer 6 from inside to outside, last filler 5, valve body backing layer 7, last gland 3 is enclosed within filler 5 tops, promote to go up gland 3 when upper press cover 2 is tightened and down compress filler 5, between near the lower valve rod 9 at butterfly plate 12 places and valve body 4, be provided with butterfly plate backing layer 6 from inside to outside, following filler 8, valve body backing layer 7, following gland 10 is located at down filler 8 bottoms, lower cover 11 makes down gland 10 up compress down filler 8 when tightening, serving as a contrast valve body backing layer 7 owing to go up the bottom and the outside of filler 5 as shown in Figure 2, the inboard is serving as a contrast butterfly plate backing layer 6, when last gland 3 compresses filler 5, the sealing effect at upper valve rod 1 place is fine, and lower valve rod 9 same sealing configurations make that the sealing effect at lower valve rod 9 places is fine.Work as valve closing, valve rod suffered radial force under the medium effect, length, Sealing mainly support and are delivered to valve body 4 by last gland 3 and following gland 10 than weak point owing to the last gland 3 outside the valve rod, following gland 10, last gland 3 and following gland 10 all are metalwork, thus valve rod when being subjected to radial force rigidity better.

Claims

1, a kind of butterfly valve, mainly comprise upper valve rod, valve body, butterfly plate, lower valve rod, the valve body backing layer, the butterfly plate backing layer, it is characterized in that: between upper valve rod of locating near butterfly plate (12) (1) and valve body (4), be provided with butterfly plate backing layer (6) from inside to outside, last filler (5), valve body backing layer (7), and the butterfly plate backing layer (6) at this position, last filler (5), valve body backing layer (7), length on upper valve rod (1) axial direction is all shorter, what last filler (5) bottom contacted is the part of valve body backing layer (7), between lower valve rod of locating near butterfly plate (12) (9) and valve body (4), be provided with butterfly plate backing layer (6) from inside to outside, following filler (8), valve body backing layer (7), and the butterfly plate backing layer (6) at this position, following filler (8), valve body backing layer (7), length on lower valve rod (19) axial direction is all shorter, what following filler (8) top contacted is the part of valve body backing layer (7), the below of the top of last filler (5) and following filler (8) is being provided with respectively goes up gland (3) and following gland (10), the interior side contacts of last gland (3) mainly be upper valve rod (1), outer side contacts mainly be valve body (4), the interior side contacts of following gland (10) mainly be lower valve rod (9), outer side contacts mainly be valve body (4).