CN2329828Y - Sleeve-type crimping structure for internal anticorrosion steel pipe - Google Patents

Abstract

The utility model relates to a structure for mutually connecting steel pipes with inner anticorrosive coating. Pipes which need to be connected are connected by casing pipes which are sheathed on two ends of the connected pipes. The inner part of each casing pipe is provided with thread grooves, and a sealing gasket is arranged between the ends of the connected pipes. Sealing gum is coated between the casing pipe and the connected pipes. The inner hole of the casing pipe and the connected pipes are in interference fit and are tightly connected together by special-purpose equipment. When the utility model is used for connecting pipes with inner anticorrosive coating, the utility model can ensure that the inner anticorrosive coating is not damaged. In addition, the utility model has simple pipe connecting process, convenient operation and reliable connection. The utility model can bear an inner pressure of 40 MPa, and can connect steel pipes with a wall thickness of not smaller than 4 mm.

Description

Interior anti-corrosive steel tube jacket-type crimping structure

The utility model relates to the structure that is connected between a kind of interior anti-corrosive steel tube.

Adopt the method for welding to connect the steel pipe with inner anticorrosioning coating, the high temperature that produces during welding can make inner anticorrosioning coating be damaged, and makes steel pipe joint place can't play antisepsis.Adopt prefabricated socket joint compression bonding method to connect, need use heating in medium frequency earlier, with pushing the machine reaming, carry out cold ream forming again, and then carry out crimping at the scene with special-purpose machinery, connecting line in this way, operation is many, the technology more complicated, labour productivity is low.And must connect according to liquid flow direction, and only be applicable to conveyance fluid pressure, the pipeline of pipeline wall thickness below 8mm less than 16MPa.Also have and a kind ofly make the overcoat connecting line with the memory alloy short tube, can guarantee that undercoating is not damaged, construction is simple, efficient height, but memory alloy short tube price height, and domestic amorphous products, the investment of founding the factory is big.

The purpose of this utility model is that a kind of connection of design has the structure of inner anticorrosioning coating steel pipe, use this structure, can connect steel pipe easily with interior anticorrosive coat, the quality of anticorrosive coat in guaranteeing, easy to operate, connect reliably good airproof performance, can bear the interior pressure of 40MPa, and go for the connection that thick walled tube gives.

Technical solution of the present utility model is to realize like this, anti-corrosive steel tube jacket-type crimping structure in a kind of, constitute by being sleeved on the steel sleeve pipe that is connected the pipeline two ends, its special way is to be interference fit between (1), cover pipe orifice and the connected tube, has annular groove at the internal surface of sleeve pipe; (2), between internal surface of casing and connected tube outer surface, scribble sealer.

In technique scheme, its special way is, (1) has sealing gasket being connected between the pipeline both ends of the surface; (2) circular groove on internal surface of casing is a thread groove.

The utility model has the advantages that: (1), can guarantee that the inner anticorrosioning coating that is connected steel pipe is not damaged; (2), steel tube end part do not need shaping in advance, technology is simple, and is easy to operate, the mechanization degree height; (3), connect reliably, can bear and press (40MPa) in higher; The steel pipe that (4), can connect wall thickness 〉=4mm; (5), cost is low, can save the expense of internal joint patch coating and nondestructive inspection.

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

Be described further (embodiment) below in conjunction with accompanying drawing

Be connected pipeline 1,6 outside diameter tolerances should meet the regulation of GB8163-87 standard, its internal surface scribbles anticorrosive coat and two chamfers, select and be connected the same material adapter sleeve 2 of pipeline for use, sleeve pipe 2 be connected pipeline 1, adopt interference fit between 6 the external diameter, its interference is in the elastic range after should making its socket, if connect the steel pipe of φ 60 * 9, casing size can be used φ 83 * 12.5, its internal diameter is φ 58.58～60.08, length 280mm, internal surface is processed into screw thread, to be connected pipe end outer surface and internal surface of casing and coat two component HJ-101 type epoxy glues respectively,, at first sleeve pipe 2 will be installed in the end of connected tube 1 at normal temperatures by special device as sealer 4, lay sealing gasket 3 in pipeline 1 end, by special device connected tube 6 is installed in the other end of sleeve pipe 2 again.

Claims (2)

1, a kind of interior anti-corrosive steel tube jacket-type crimping structure is connected pipeline (1,6) the equal steel sleeve pipes in two ends (2) formation by being sleeved on, and it is characterized in that:

(1) is interference fit between sleeve pipe (2) endoporus and the connected tube, has annular groove at the internal surface of sleeve pipe (2);

(2) between sleeve pipe (2) internal surface and connected tube (1,6) outer surface, scribble sealer (4).

2, interior anti-corrosive steel tube jacket-type crimping structure according to claim 1 is characterized in that:

(1) has sealing gasket (3) being connected between pipeline (1, the 6) two ends;

(2) annular groove on the internal surface of sleeve pipe (2) is a thread groove.

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