CN2365487Y - Cast tube convex ring joint - Google Patents

Abstract

The utility model discloses a cast tube convex ring joint. Both ends of a cast tube 2 are respectively provided with a convex ring 1 which can be matched with an engineering tube joints to obtain the sealed connection between straight tubes.

Description

Cast tube convex ring joint

The utility model relates to a kind of pipe joint that makes cast-iron pipe realize and flexibly connecting.

For cast-iron pipe, generally adopt the horn bellmouth to connect, and it is sealed with pitch, cement, lead based alloy.In long-term using process, owing to be subjected to the restriction of landform, landforms and installation conditions, the influence of factors such as earthquake in addition, ground cleave, ground variation and temperature variation, the straighttube-type pipeline junction is easy to throw off or crackle appears in pipe shaft, once seepage occurs, its maintenance and debugging difficulty are quite big, both lost time, influence ordinary production again, the environment of maintenance and debugging is relatively poor, and labor strength is big.In addition, technology difficulty is big during spun cast pipe, equipment is complicated, metallic material consumption is big, product cost is high, and is also extremely inconvenient when transportation and installation.

The purpose of this utility model is exactly for overcoming the deficiency described in the above-mentioned background technology, and a kind of pipe joint that makes cast-iron pipe can realize and flexibly connecting is provided.

The technical solution that realizes above-mentioned purpose is: this Cast tube convex ring joint comprises cast tube, and it mainly is to be provided with bulge loop in the end of cast tube.Said bulge loop is positioned at the one or both ends portion of cast tube.

Fig. 1: structural representation of the present utility model.

Fig. 2: the structural representation after the utility model is realized flexibly connecting.

Below in conjunction with accompanying drawing the utility model is done an explanation.

As shown in Figure 1, directly casting out two annular protrusions at the two end part of cast tube 2 is bulge loop 1; Or only directly casting out bulge loop 1 at an end of cast tube 2, its other end adopts the mode of cast iron welding will cast good bulge loop 1 and is welded on the outer wall of cast tube 2; Also can adopt the mode of welding two bulge loops 1 to be welded on respectively on the tube wall at two end part of cast tube 2.

Fig. 2 shows an embodiment of the present utility model.With the alignment of the end face of two cast tubes 2, be connected to the junction point of two cast tubes 2 with the pipe joint 5 that has seal ring 3, and make bulge loop 1 be positioned at the slip groove 6 of pipe joint 5, screw on the pipe joint 5 bolt 4 and promptly finish whole connection procedure.

Owing to be provided with the flexible seal ring of being made by materials such as rubber or nylon 3 in pipe joint 5, the pipe internal pressure is big more, and sealing effect is just good more, so the seepage phenomenon can not occur.Again because of the bulge loop on the cast tube 21 is stuck in the slip groove 6 of pipe joint 5, and can in slip groove 6, produce axial displacement and unlikely disengagement, thereby can eliminate because expand with heat and contract with cold the pipeline bursting that produces or the phenomenon of disengagement.

This bulge loop interface can make the straight tube pipeline directly connect.Needn't adopt the bellmouth socket.This structural improvement makes its processibility and function of use that bigger variation all take place: at first, it makes the production technology of spun cast pipe obtain simplifying, and has reduced technology difficulty.Owing to there is not the bellmouth position, termination resin sand core or avoid adopts cantilever in the time of will saving centrifugal casting and the contacted resin sand of metal Free Surface.Secondly, the straight tube of bulge loop interface connects size and the weight that greatly reduces connection part, has saved the part that the connected structure overlaps each other, and does not also need sealing operation traditional in the connected structure, the most suitable and engineering flexible pipe joint is used, to realize being tightly connected between the straight tube.

Claims (2)

1, a kind of Cast tube convex ring joint comprises cast tube (2), it is characterized in that being provided with bulge loop (1) in the end of cast tube (2).

2, Cast tube convex ring joint as claimed in claim 1 is characterized in that bulge loop (1) is positioned at the two end part of cast tube (2).