CN2124367U

CN2124367U - Gray cast-iron pipe with mechanically connecting

Info

Publication number: CN2124367U
Application number: CN 92205525
Authority: CN
Inventors: 荆加福; 胥昌祺; 韩金香
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-01
Filing date: 1992-04-01
Publication date: 1992-12-09

Abstract

The utility model relates to a gray cast-iron pipe with a flexible mechanical connecting, being used for conveying gas and fluid. The utility model is characterized in that an O-shaped rubber supporting ring and a rubber sealing ring are used as a sealing element; a pressure flange and a malleable iron bolt are used a fastening element. The reliable sealing and the flexible connection with a larger break angle between the bell opening and the inserting opening of a grey cast-iron pipe are completed by utilizing double actions of increasing the volume of the concave groove of the sealing ring by the supporting ring pressing into and the elastic deformation of the sealing ring. Compared with the connecting pipe of an existing cast-iron pipe sleeve and the cast iron pipe of the flexible mechanical connecting, the utility model has the advantages of reliable sealing performance and low cost. The aim that only leakage in a specification can be reached by using the connecting with a smaller size can be realized.

Description

Gray cast-iron pipe with mechanically connecting

The utility model is a kind of flexible mechanical interface gray cast iron tube.Be mainly used in delivery of fuel gas and fluid such as coal gas, natural gas, feedwater and draining.

The flexible mechanical interface cast iron tube of delivery of fuel gas and fluid has two kinds of forms at present.A kind of is straight tube cast iron sleeve pipe, and its shortcoming is: 1, interface has two pair rubber bracing rings, two pair rubber seal rings and two pairs of differentials.2, leakage point is changeable by a place is two places.Leakage point has increased by one times.Connecting sleeve must place the neutral position of two cast iron straight pipe interfaces when 3, installing.Otherwise will reduce the sealing and the anti-property dialled of interface.Another kind is plastic support circle and rubber seal formula flexible mechanical interface cast iron tube, and its shortcoming is 1, bellmouth position volume is big, weight is big.2, the volume of differential is big, weight is big.3, the volume of rubber seal is big.4, little only 6 degree of interface knuckle are flexible relatively poor.5, the link of large-diameter cast iron pipe and small-bore cast iron tube all adopts a kind of M ²⁰The malleable iron bolt of specification causes the volume at small-bore cast-iron pipe joint position big, Heavy Weight.6, only utilize the resiliently deformable behind the rubber seal plus-pressure to seal, seal reliable inadequately and desirable.

Purpose in model utility is that a kind of leakage point of design only is a place, and bellmouth position and differential volume are little, in light weight, the flexible mechanical interface gray cast iron tube of good seal performance.

The realization the technical solution of the utility model is: comprise body socket 6, differential 7 seal rings 4, bracing ring 5 and body bellmouth 7, crucial part is that bracing ring is an O type rubber ring 5, and embed in the groove of rubber seal 4, be set on the cast iron body socket 6, cast iron body socket 6 is enclosed within the body bellmouth 7, differential 3 is connected with body bellmouth 7 with bolt 2 by nut 1.

In the utility model, be embedded in together O type bracing ring 5 and rubber seal 4 between differential 3, body socket 6 and body bellmouth 7, between bracing ring 4 and the body socket 6, between bracing ring 4 and the seal ring 5, form a sealing air chamber respectively between bracing ring 4 and the body bellmouth 7, it helps sealability.

The angle of the interface knuckle 8 of body bellmouth is 8 degree.

The utility model is because differential is pressed in the body bellmouth 7 rubber seal equably, utilize rubber 5 to be pressed into that volume in the rubber seal groove increases and the double action of the resiliently deformable of rubber seal itself, reach and make the cast-iron pipe joint sealing more reliable, operate simpler, increase the purpose that knuckle is flexible and have only a place to leak, advantage such as the utility model also has bellmouth and the differential volume is little, in light weight, save material, cost is low.

Accompanying drawing is a structural representation of the present utility model.

Claims

1, a kind of flexible mechanical interface gray cast iron tube, comprise body socket, differential, seal ring, bracing ring and body bellmouth, it is characterized in that bracing ring is an O type rubber ring, and embed in the groove of rubber seal, be set on the cast iron body socket, cast iron body socket is enclosed within the body bellmouth, by nuts and bolt differential is connected with the body bellmouth.

2, by the described flexible mechanical interface of claim 1 gray cast iron tube, it is characterized in that being embedded in together O type bracing ring and rubber seal between differential, body socket and body bellmouth, between bracing ring and the body socket, between bracing ring and the seal ring, form a sealing air chamber between bracing ring and the body bellmouth respectively, it helps sealability.

3, by the described flexible mechanical interface of claim 1 gray cast iron tube, the angle that it is characterized in that the interface knuckle of body bellmouth is 8 degree.