CN2573835Y

CN2573835Y - Steel pipe lining plastic pipe connecting sealing structure

Info

Publication number: CN2573835Y
Application number: CN 01218329
Authority: CN
Inventors: 周立超; 王玉贵; 吕金信
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-27
Filing date: 2001-03-27
Publication date: 2003-09-17
Anticipated expiration: 2011-03-27

Abstract

The utility model relates to a connecting sealing structure of a steel pipe lined with a plastic pipe, which belongs to the technical field of petroleum conveying pipeline engineering. The utility model mainly comprises steel pipes of a petroleum conveying pipeline and a lined plastic pipe. The shapes of two butt jointed steel pipes at the end part of an interface have augmented diameter width; the internal walls of the steel pipes are provided with saw-tooth sealing grooves; tubular inner layer core sleeves are respectively squeezed at the inner wall point of the plastic pipe, and the outer margin of the lined plastic pipe is embedded into the saw-tooth sealing grooves of the peripheral steel pipe inner wall to be sealed. The structure has the advantages of good sealability, high temperature resistance, corrosion resistance, short repair period, economy and utility, and the service life of the steel pipe can be prolonged to 20-50 years from the existing 5-10 years.

Description

The connection sealing configuration of lining inner surface of tubes with plastics pipe

(1) technical field

The utility model belongs to petroleum pipeline engineering field, specially refers to a kind of connection sealing configuration that is used for the lining inner surface of tubes with plastics pipe of conveyance conduit.

(2) background technique

In wide the earth depths, especially around each elephant, burying a large amount of oil transportations as network, gas transmission and sewage conduct, these pipelines are in work year in year out, majority is all in corrosion in various degree, aging, near the date of retirement, simultaneously, the water supply line of each big and medium-sized cities also has many leak condition that occurred, if upgrade these pipelines comprehensively, need the excavation pipe trench, engineering work load is big, the cost height, and long construction period, also have influence on above ground structure and communal facility, cause inconvenience to the common people, how to shorten periodically for this reason and repair and the local replacing pipe problems, become a construction project that merits attention always, before this, the applicant has participated in studying and proposing the patent application of related content, for example, 99112265.8 number patent has been described a kind of technological method, but because coated technique poor adhesive force in the tunnel joint place cement mortar, repairing efficiency is long, has certain defective, No. 00256989.2 patent afterwards, the liner pipe joint has been described, threeway and elbow and anticorrosion problem, along with further maintenance, the needs of construction have been innovated the design about the connection seal arrangement that the lining inner surface of tubes with plastics pipe is provided in practice again, and this is the much progress at another technology in the transfer line reinstatement works.

(3) summary of the invention

The utility model technical issues that need to address, be long in order to overcome in the prior art of repairing petroleum pipeline repairing efficiency, defectives such as outer coating material poor adhesive force, and restudy a kind of connection sealing structure of more effective lining inner surface of tubes with plastics pipe, be used for the pipeline reparation.

The utility model relies on following technical proposals to realize, a kind of connection sealing configuration of lining inner surface of tubes with plastics pipe, mainly comprise the steel pipe of petroleum pipeline, the pipe of inner lining of steel pipe, it is characterized in that, it is wide that the shape of the steel pipe of two sections butt joints in the interface end has the footpath of expansion, wall has been processed sawtooth sealing groove within it, the internal layer core retainer plate of tubulose is squeezed in the inwall place of inner lining plastic tube respectively, and the outer rim that makes inner lining plastic tube embeds in the sawtooth sealing groove of its peripheral steel pipe inwall and sealed, again with the mutual butt welding of reducing outer layer pipe at two ends.

The inwall processing sawtooth seal groove ditch of described outer layer pipe reducing reaming place can be chosen 2-10 road groove.

Described internal layer core retainer plate can select for use stainless steel, cast iron or carbon steel inner lining glass fiber reinforced plastic to constitute.

The good effect that this programme had is, this sealing structure is good, and corrosion-and high-temp-resistant makes steel pipe extend to 20-50 by present 5-10 working life, and it is short, economical and practical to repair the duration.

Further specify embodiment below in conjunction with accompanying drawing:

(4) description of drawings:

Fig. 1 is the connection sealed structural representation of lining inner surface of tubes with plastics pipe.

(5) embodiment

With reference to Fig. 1, its expression the utility model structural representation is among the figure, 1 is outer layer pipe, carry out the footpath that the reducing enlarging makes it have expansion in the port of two sections butt joint steel pipes wide, and its inwall is provided with zigzag fashion groove 2, selects 5 road grooves in the present embodiment, inner lining plastic tube is 3, internal layer core retainer plate 4 is pressed into wall within the plastic tube 3, and inner lining plastic tube 3 outer rims are embedded in the groove 2 of outer layer pipe inwall, has formed the structure of sealing, with two sections butt tube joint butt welding, the port weld seam is 5 again.

Claims

1, a kind of connection sealing configuration of lining inner surface of tubes with plastics pipe, mainly comprise the steel pipe of transfer line, the plastic tube of inner lining of steel pipe, it is characterized in that, the steel pipe of two sections butt joints is in the shape of interface end, footpath with expansion is wide, wall contains sawtooth sealing groove within it, and the core retainer plate of tubulose is squeezed in the inwall place of inner lining plastic tube respectively, and the outer rim of inner lining plastic tube is embedded in the sawtooth sealing groove of its peripheral steel pipe inwall.

2, sealing configuration according to claim 1 is characterized in that, the sawtooth sealing groove of described outer layer pipe reducing reaming place inwall can be chosen 2-10 road groove.

3, sealing configuration according to claim 1 is characterized in that, described internal layer core retainer plate can be selected stainless steel, cast iron for use, also can be made of the carbon steel inner lining glass fiber reinforced plastic.