CN201763973U

CN201763973U - Bidirectional sealed center line butterfly valve

Info

Publication number: CN201763973U
Application number: CN201020528719XU
Authority: CN
Inventors: 刘庆国; 蔡毅; 黄时生; 施建华
Original assignee: SHANGHAI WEILUN VALVE CO LTD
Current assignee: SHANGHAI WEILUN VALVE CO LTD
Priority date: 2010-09-14
Filing date: 2010-09-14
Publication date: 2011-03-16
Anticipated expiration: 2020-09-14

Abstract

The utility model discloses a bidirectional sealed center line butterfly valve. A fixed shaft base and a moving shaft base are respectively disposed on two ends of a center line of a valve body. A fixed shaft is disposed on the fixed shaft base, and a moving shaft is disposed on the moving shaft base. A butterfly plate is inclined at an angle of 10 to 25 DEG to the center line and disposed in an inner cavity of the valve body, and the outer periphery of the butterfly plate is provided with an O-shape sealing ring II. A circular sealing platform cooperated with the butterfly plate is disposed on the inner wall of the inner cavity of the valve body. The lower part of the butterfly plate is rotatably disposed on the fixed shaft, and the upper part of the butterfly plate is connected with the moving shaft. The upper end of the moving shaft is provided with a handle with a positioning mechanism, and a positioning plate cooperated with the positioning mechanism of the handle is fixed on the upper end of the moving shaft. By using the utility model, the medium can be bidirectionally sealed with differentiating the front and rear side. The utility model has advantages of good sealing performance, stable performance, convenient assembly, safety and reliability.

Description

A kind of two way sealed centre-pivoted butterfly valve

Technical field

The utility model relates to a kind of valve, relates in particular to a kind of two way sealed centre-pivoted butterfly valve.

Background technique

Butterfly valve structure is simple, volume is little, in light weight, only form by a few parts.And only need half-twist; Get final product fast opening and closing, simple to operate, have good fluid control characteristic.On general industries such as oil, coal gas, chemical industry, water treatment, be used widely at present.But the butterfly valve ubiquity of prior art shortcomings such as unstable properties, assembling inconvenience, poor sealing.

Summary of the invention

At above defective, the utility model provides the two way sealed centre-pivoted butterfly valve of a kind of stable performance, easy to assembly, good airproof performance.

For achieving the above object, the utility model is by the following technical solutions: a kind of two way sealed centre-pivoted butterfly valve, it comprises valve body, at body cavity butterfly plate is arranged, it is characterized in that: about valve body, be respectively equipped with dead axle seat and moving axis seat on the central axis of both sides, on the dead axle seat, dead axle is installed, on the moving axis seat, moving axis is installed, the butterfly plates of spending angles with central axis inclination 10～25 are arranged at body cavity, the outer rim of butterfly plate has O-ring seals II, the ring packing platform that matches with butterfly plate is arranged on the inwall of body cavity, the bottom of butterfly plate is installed in rotation on the dead axle, the top of butterfly plate is connected with moving axis, and the handle with positioning means is installed in the upper end of moving axis, at the fixing positioning plate that matches with the handle positioning means in the upper end of moving axis seat.

Described butterfly plate and central axis tilt angle be 18～22 degree preferably.

On dead axle, butterfly plate is installed by bearing I and bearing I I.

In the mounting hole of dead axle seat internal thread is arranged, there is outside thread the lower end of dead axle, and dead axle is fixed on the dead axle seat by screw thread and O-ring seals I.

In order to guarantee to lock and adjust the setting height(from bottom) of dead axle, guarantee that the butterfly plate center is coaxial with the valve body center, in dead axle seat lower end a locking nut that is enclosed within on the dead axle outside thread is arranged.

There is spring eye upper end at dead axle, and the discharge spring that is supported between dead axle and the butterfly plate is installed in spring eye.

On the moving axis seat, moving axis is installed, between outer section of the moving axis seat and moving axis, is provided with stuffing box, O-ring seals III and bearing V are arranged between stuffing box and the moving axis by bearing I II, bearing I V, stuffing box and moving axis seat lock screw arranged.

Described stuffing box is fixedlyed connected with the moving axis seat by screw thread, has designed two blind holes that can insert instrument on the stuffing box.

The beneficial effects of the utility model are: 1. install at butterfly plate and central axis inclination 10～25 degree angles, can realize that medium is regardless of the two way sealed of front and back; The outer rim of butterfly plate has O-ring seals II, and the ring packing platform that matches with butterfly plate is arranged on the inwall of body cavity, adopt this pressure selfsealings form, the sealability of the present utility model that has strengthened.2. dead axle and valve body screw-thread fit can freely be adjusted height of C.G., guarantee that the butterfly plate center is coaxial with the valve body center, and locking nut locking dead axle has prevented the loosening of dead axle and valve body.3. stuffing box is threaded with valve body, has saved the part space; Design blind hole on the stuffing box, can insert instrument, convenient for assembly; After joining Cock screw between stuffing box and the valve body, effectively prevented the loosening and rotation of screw thread.4. processing spring eye in dead axle upper-end surface makes spring that the space of firm installation arranged; After between butterfly plate and the dead axle pressure spring being installed, the static that sealing surface produces during switch valve is derived thus, has avoided the generation of fire.

Description of drawings

Fig. 1 is the utility model two way sealed centre-pivoted butterfly valve closed condition cross-sectional view;

Among the figure: 1. locking nut, 2. dead axle seat, 3.O shape seal ring I, 4. dead axle, 5. bearing I, 6. discharge spring, 7. bearing I I, 8. butterfly plate, 9.O shape seal ring II, 10. moving axis, 11. bearing I II, 12. bearing I V, 13. stuffing box, 14.O shape seal ring III, 15. bearing V, 16. ring packing platforms, 17. the moving axis seat, 18. valve bodies, 19. blind holes, 20. lock screw, 21. positioning plates, 22. handles.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As shown in Figure 1, a kind of two way sealed centre-pivoted butterfly valve, it comprises valve body 18, at valve body 18 inner chambers butterfly plate 8 is arranged, on a central axis of valve body both sides about in the of 18, be respectively equipped with dead axle seat 2 and moving axis seat 17, dead axle 4 is installed on dead axle seat 2, in the mounting hole of dead axle seat 2, internal thread is arranged, there is outside thread the lower end of dead axle 4, and dead axle 4 is fixed on the dead axle seat 2 by screw thread and O-ring seals I 3; A locking nut 1 that is enclosed within on the dead axle outside thread is arranged in dead axle seat 2 lower ends; There is spring eye upper end at dead axle 4, and the discharge spring 6 that is supported between dead axle 4 and the butterfly plate 8 is installed in spring eye.On moving axis seat 17, moving axis 10 is installed by bearing I II11, bearing I V12, between outer section of moving axis seat 17 and moving axis 10, be provided with stuffing box 13, O-ring seals III14 and bearing V 15 are arranged between stuffing box 13 and the moving axis 10, stuffing box 13 and moving axis seat 17 lock screw 20 arranged; Described stuffing box 13 is fixedlyed connected with moving axis seat 17 by screw thread, has designed two blind holes 19 that can insert instrument on the stuffing box 13.The butterfly plates 8 of spending angles with central axis inclination 20 are arranged at valve body 18 inner chambers, the outer rim of butterfly plate 8 has O-ring seals II 9, the ring packing platform 16 that matches with butterfly plate 8 is arranged on the inwall of valve body 18 inner chambers, the bottom of butterfly plate 8 is installed in rotation on the dead axle 4 by bearing I 5 and bearing I I 7, the top of butterfly plate 8 is connected with moving axis 10, the handle 22 with positioning means is installed in the upper end of moving axis 10, at the fixing positioning plate 21 that matches with the handle positioning means in the upper end of moving axis seat 17.

Claims

1. two way sealed centre-pivoted butterfly valve, it comprises valve body (18), at valve body (18) inner chamber butterfly plate (8) is arranged, it is characterized in that: be respectively equipped with dead axle seat (2) and moving axis seat (17) on the central axis of both sides up and down at valve body (18), go up installation dead axle (4) at dead axle seat (2), go up installation moving axis (10) at moving axis seat (17), the butterfly plates (8) of spending angles with central axis inclination 10～25 are arranged at valve body (18) inner chamber, the outer rim of butterfly plate (8) has O-ring seals II (9), the ring packing platform (16) that matches with butterfly plate (8) is arranged on the inwall of valve body (18) inner chamber, the bottom of butterfly plate (8) is installed in rotation on the dead axle (4), the top of butterfly plate (8) is connected with moving axis (10), the handle (22) with positioning means is installed in the upper end of moving axis (10), at the fixing positioning plate (21) that matches with the handle positioning means in the upper end of moving axis seat (17).

2. according to the described two way sealed centre-pivoted butterfly valve of claim 1, it is characterized in that: described butterfly plate (8) is 18～22 degree with the central axis tilt angle.

3. according to the described two way sealed centre-pivoted butterfly valve of claim 2, it is characterized in that: go up by bearing I (5) and bearing I I (7) at dead axle (4) butterfly plate (8) is installed.

4. according to the described two way sealed centre-pivoted butterfly valve of claim 3, it is characterized in that: in the mounting hole of dead axle seat (2) internal thread is arranged, there is outside thread the lower end of dead axle (4), and dead axle is fixed on the dead axle seat (2) by screw thread and O-ring seals I (3).

5. according to the described two way sealed centre-pivoted butterfly valve of claim 4, it is characterized in that: a locking nut (1) that is enclosed within on dead axle (4) outside thread is arranged in dead axle seat (2) lower end.

6. according to the described two way sealed centre-pivoted butterfly valve of claim 5, it is characterized in that: there is spring eye the upper end at dead axle (4), and the discharge spring (6) that is supported between dead axle (4) and the butterfly plate (8) is installed in spring eye.

7. according to each described two way sealed centre-pivoted butterfly valve of claim 1 to 6, it is characterized in that: go up by bearing I II (11), bearing I V (12) at moving axis seat (17) moving axis (10) is installed, between outer section of moving axis seat (17) and moving axis (10), be provided with stuffing box (13), O-ring seals III (14) and bearing V (15) are arranged between stuffing box (13) and the moving axis (10), stuffing box (13) and moving axis seat (17) lock screw (20) arranged.

8. according to the described two way sealed centre-pivoted butterfly valve of claim 7, it is characterized in that: described stuffing box (13) is fixedlyed connected with moving axis seat (17) by screw thread, has designed two blind holes (19) that can insert instrument on the stuffing box (13).