CN202327139U

CN202327139U - Butterfly valve

Info

Publication number: CN202327139U
Application number: CN2011204564062U
Authority: CN
Inventors: 李运龙; 王少华
Original assignee: ZHEJIANG KAIRUITE VALVE INDUSTRIAL CO LTD
Current assignee: ZHEJIANG KAIRUITE VALVE INDUSTRIAL CO LTD
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2012-07-11
Anticipated expiration: 2021-11-17

Abstract

The utility model discloses a butterfly valve, which includes a valve body, a valve rod and a butterfly plate, wherein the butterfly plate is mounted in the valve body; the valve rod is arranged on the valve body in a penetrating manner, and is fixedly connected with the butterfly plate in the valve body; the valve rod comprises an upper valve rod and a lower valve rod that are coaxially arranged; the upper end and the lower end of the butterfly plate are provided with square slotted holes respectively; one end of the upper valve rod and one end of the lower valve rod adopt square structures which are connected with the upper square slotted hole and the lower square slotted hole in the butterfly plate in a clamped and matched manner; and the structure enables the connection between the valve rod and the butterfly plate to be more stable and reliable. Compared with the prior art, the butterfly valve avoids use of cylindrical pins, efficiently prevents the phenomenon that the valve rod and the butterfly plate are disconnected due to cutting off of the cylindrical pins, and ensures the normal opening and closing operations of the valve; in addition, an O-shaped seal ring and a single-row radial ball bearing are arranged between the upper and the lower valve rods and the valve body, thereby not only improving the sealing effect of the valve, but also reducing the rotational torque of the valve rod, and lowering the labor intensity of operators.

Description

A kind of butterfly valve

Technical field

The utility model relates to a kind of valve, is specifically related to a kind of butterfly valve.

Background technique

Butterfly valve is a kind of common valve, at present, existing reed valve, its structure is as shown in Figure 1; Mainly comprise valve body, valve rod, butterfly plate, butterfly plate is loaded in the valve body, and valve rod is arranged on the valve body; And constitute and to be fixedly connected with butterfly plate in the valve body, described valve rod is an integrated type major axis structure, realizes fixing through the several cylinders pin between valve rod and the butterfly plate; Therefore but because of the existence of the actual machining error of straight pin, when valve rod drives butterfly plate and rotates, the suffered shearing force of several cylinders pin is with difference; Usually can cause valve rod and butterfly plate to shake each other, this moment, straight pin was cut off easily under the impact force of medium; Be connected thereby valve rod is lost with butterfly plate, influence the normal open and close of valve, make troubles to the user.Existing reed valve in addition, the filler that the sealing between its valve rod and the valve body adopts Expanded graphite to process is usually realized, after filler is filled into; Compress through Gland again; But in actual mechanical process, the tension that Gland is pressed then can increase the moment of torsion of valve rod; The too pine that Gland is pressed is easy to generate the space again, thereby causes valve leak, makes troubles and difficulty for user's practical operation.

Summary of the invention

To the deficiency of existing technology, the utility model provides that a kind of connection is more reliable, sealability is better and the less butterfly valve of valve rod operation moment of torsion.

For realizing above-mentioned purpose, the utility model provides a kind of butterfly valve, comprises valve body, valve rod, butterfly plate; Butterfly plate is loaded in the valve body, and valve rod is arranged on the valve body, and is fixedly connected with butterfly plate in the valve body; Described valve rod is made up of upper valve rod and lower valve rod; And described upper valve rod is coaxial setting with lower valve rod, and the upper/lower terminal of said butterfly plate is respectively equipped with square slotted eye, and an end of upper valve rod and an end of lower valve rod are with the mutual card of the upper and lower square slotted eye formation of butterfly plate joins the tetragonal that is connected.

The beneficial effect of the utility model is: adopt said structure; The utility model adopts the upper and lower valve rod of coaxial setting to substitute the single valve bar of existing technology; Simultaneously the connection between upper and lower valve rod and the butterfly plate is through realizing at the upper and lower square slotted eye of offering on the butterfly plate and with its tetragonal that blocks mutually on the upper and lower valve rod of joining; Make to be connected more reliable and stablely between valve rod and the butterfly plate, and compared with prior art, removed the use of straight pin; Avoided being cut off the phenomenon that causes valve rod and butterfly plate to lose being connected effectively and taken place, guaranteed the normal keying work of valve because of straight pin.

The utility model can further be set between said upper valve rod and the valve body, be equipped with O-ring seals between lower valve rod and the valve body, and all offers the O shape ring recess of some ccontaining O-ring seals on the circumferential surface of said upper valve rod and lower valve rod.

Adopt O-ring seals to be used as the sealing configuration between upper and lower valve rod and the valve body, than the sealing configuration of available technology adopting Expanded graphite and Gland formation, sealability is more reliable, can also alleviate the driving torque of valve rod simultaneously.

The utility model also can further be set between said upper valve rod and the valve body, be equipped with single-row radial ball bearing between lower valve rod and the valve body, and described single-row radial ball bearing is installed on the valve body through bearing cap.

Between upper and lower valve rod and valve body, set up single-row radial ball bearing, can further reduce the driving torque of valve rod, reduced labor intensity of operating personnel widely.

Description of drawings

Fig. 1 is the prior art constructions sectional view;

Fig. 2 is the structure sectional view of the utility model;

Fig. 3 is the A portion enlarged view of Fig. 2;

Fig. 4 is the B portion enlarged view of Fig. 2.

Embodiment

Like Fig. 2,3, provided a kind of butterfly valve shown in 4, comprise valve body 1, valve rod, butterfly plate 2, butterfly plate 2 is loaded in the valve body 1; Valve rod is arranged on the valve body 1, and is fixedly connected with valve body 1 interior butterfly plate 2, and described valve rod is made up of upper valve rod 3 and lower valve rod 4; And described upper valve rod 3 is coaxial setting with lower valve rod 4; The upper/lower terminal of said butterfly plate 2 is respectively equipped with square slotted eye, and lower valve rod 4 is loaded in the valve body 1, and the upper end 41 of lower valve rod 4 is for joining affixed tetragonal with square slotted eye 21 cards in butterfly plate 2 lower ends; Upper valve rod 3 is arranged on the valve body 1; The lower end 31 of upper valve rod 3 is for joining affixed tetragonal with square slotted eye 22 cards in butterfly plate 2 upper ends, and the upper end 32 of upper valve rod 3 passes outside the valve body 1, and the said valve body 1 outer upper valve rod upper end 32 that passes is connected with actuator 5.Between said upper valve rod 3 and the valve body 1, be equipped with O-ring seals 6 between lower valve rod 4 and the valve body 1, and all offer the O shape ring recess 33,42 of some ccontaining O-ring seals 6 on the circumferential surface of said upper valve rod 3 and lower valve rod 4.Between said upper valve rod 3 and the valve body 1, be equipped with single-row radial ball bearing 7 between lower valve rod 4 and the valve body 1, and described single-row radial ball bearing 7 is installed on the valve body 1 through bearing cap 8.

Claims

1. a butterfly valve comprises valve body, valve rod, butterfly plate, and butterfly plate is loaded in the valve body; Valve rod is arranged on the valve body; And be fixedly connected with butterfly plate in the valve body, it is characterized in that: described valve rod is made up of upper valve rod and lower valve rod, and described upper valve rod is coaxial setting with lower valve rod; The upper/lower terminal of said butterfly plate is respectively equipped with square slotted eye, and an end of upper valve rod and an end of lower valve rod are with the mutual card of the upper and lower square slotted eye formation of butterfly plate joins the tetragonal that is connected.

2. a kind of butterfly valve according to claim 1; It is characterized in that: between said upper valve rod and the valve body, be equipped with O-ring seals between lower valve rod and the valve body, and all offer the O shape ring recess of some ccontaining O-ring seals on the circumferential surface of said upper valve rod and lower valve rod.

3. a kind of butterfly valve according to claim 1 and 2 is characterized in that: between said upper valve rod and the valve body, be equipped with single-row radial ball bearing between lower valve rod and the valve body, and described single-row radial ball bearing is installed on the valve body through bearing cap.