CN2155475Y

CN2155475Y - U-shaped elastic metal sealing eccentric butterfly valve

Info

Publication number: CN2155475Y
Application number: CN 93236757
Authority: CN
Inventors: 朱永泉; 姜志勇
Original assignee: Jiangdu County No1 Special Valve Plant
Current assignee: Jiangdu County No1 Special Valve Plant
Priority date: 1993-04-27
Filing date: 1993-04-27
Publication date: 1994-02-09
Anticipated expiration: 2003-04-27

Abstract

A U-shaped elastic metal sealing eccentric butterfly valve is suitable for controlling a pipeline flow passage and belongs to the technical field of valves. The key point of the butterfly valve lies in that the butterfly plate and the sealing device of the original butterfly valve are improved. The butterfly valve is provided with a U-shaped elastic metal sealing ring, and the butterfly plate is designed to be oval and similar to a butterfly plate which is obliquely cut from a cylinder. The U-shaped elastic metal sealing ring is arranged in a sealing ring groove on the valve body and is pressed and fixed by a pressing ring. The utility model discloses the leakproofness is good, and is corrosion-resistant, high temperature resistant, high pressure, long service life.

Description

U-shaped elastic metal packing eccentric butterfly valve

The utility model relates to the control valve that is provided with in the liquid transport pipeline, belongs to valve technology field.

At present, the butterfly valve that is used for water transport pipeline is made of valve body, upper valve rod, lower valve rod, support, worm gear, worm screw, handle, butterfly plate etc., butterfly plate is a circular plate, be fixed on the upper and lower valve rod, adopt rubber seal between butterfly plate and the valve body, the rocking-turn handle makes upper valve rod drive butterfly plate through worm gear, worm screw and opens or close.Because of butterfly plate is circular, stuck when easily causing valve closing.Because valve opening is more frequent, and rubber seal is fragile, cause the tight and leakage of valve closing again.

The purpose of this utility model is that a kind of U-shaped elastic metallic seal eccentric formula butterfly valve flexible, good seal performance that opens and closes will be provided.

The purpose of this utility model is achieved in that U-shaped elastic metallic seal eccentric formula butterfly valve, be on the basis of existing reed valve, to improve to form, it comprises valve body 19, support 14, be contained in valve body 19, upper valve rod 15 in the support 14, lower valve rod 26, be fixed on, butterfly plate 24 on the lower valve rod, the worm-wheel shaft 7 that is connected with upper valve rod, be installed in the worm gear 8 on the worm-wheel shaft, with worm gear engaged worm 9, installation is connected the handle 12 of worm screw end, it is characterized in that butterfly valve is provided with U-shaped elastic metallic seal ring 23, butterfly plate 24 ovalizes are in the closure gasket groove that U-shaped elastic metallic seal ring 23 is arranged on the valve body.When rocking-turn handle 12, butterfly plate rotated near the position closed, the circumferential surface at its major axis place at first contacted with U-shaped elastic metallic seal ring 23, to extrapolation, the minor axis of butterfly plate 24 was contacted with seal ring the point of contact of seal ring.The circumferential surface that finally causes butterfly plate 24 contacts fully with seal ring 23 and reaches sealing.When opening valve, butterfly plate and seal ring are thrown off, and U-shaped elastic metallic seal ring 23 recovers its garden shape.Said U-shaped elastic metallic seal ring ring is meant that its section takes the shape of the letter U.

The utility model is simple and reasonable for structure, manufactures easily, and good seal performance, adaptability is good, and long service life has the excellent popularization using value.

Accompanying drawing is a structural representation of the present utility model, 1 worm gear, 2 bolts, 3 pointers, 4 back-up rings, 5 worm gears, 8 case lids, 6 worm-wheel shafts, 7 keys, 8 worm gears, 9 worm screws, 10 nuts, 11 worm screw shaft-cups, 12 handles, 13 bolts, 14 supports, 15 upper valve rods, 16 bolts, 17 Glands, 18 bolts, 19 valve bodies, 20 fillers, 21 trim rings, 22 screws, 23 seal rings, 24 butterfly plates, 25 pins, 26 lower valve rods, 27 sealing gaskets, 28 screws, 29 cappings among the figure.

Narrate case study on implementation of the present utility model below in conjunction with accompanying drawing.

Earlier valve body 19, support 14, upper and

lower valve rod

15,26, worm-wheel shaft 7, worm gear 8, worm screw 9, handle 12 etc. are installed.Butterfly plate 24 is made ellipse, and (the same like what cut sth. askew from Cylinder and) is fixed on the upper and lower valve rod 15,26.Make U-shaped elastic metallic seal ring 23 with sheet metal.Establish closure gasket groove and trim ring step on the valve seat circumference of valve body 19, U-shaped elastic metallic seal ring 23 is placed in the closure gasket groove, install and fix with trim ring 21, screw 22.

Claims

A kind of U-shaped elastic metallic seal eccentric formula butterfly valve, comprise valve body 19, support 14, be installed in upper valve rod 15, lower valve rod 26 in valve body 19, the support 14, be fixed on the butterfly plate 24 on the upper and lower valve rod, the worm-wheel shaft 7 that is connected with upper valve rod, be installed in the worm gear 8 on the worm-wheel shaft, with worm gear engaged worm 9, installation is connected the handle 12 of worm screw end, it is characterized in that butterfly valve is provided with U-shaped elastic metallic seal ring 23, butterfly plate 24 ovalizes are in the closure gasket groove that U-shaped elastic metallic seal ring 23 is arranged on the valve body.