CN2572188Y

CN2572188Y - High-insulation settling-resistant corrosion-resistant gas leading in pipe

Info

Publication number: CN2572188Y
Application number: CN 02244487
Authority: CN
Inventors: 周伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-21
Filing date: 2002-10-21
Publication date: 2003-09-10
Anticipated expiration: 2012-10-21

Abstract

The utility model relates to a high-insulation, sedimentation-resistance and corrosion-resistance gas guiding pipe, which belongs to a service guiding pipe (short peg) of a low voltage pipe network of a courtyard in a gas pipe network. The utility model is mainly a flexible connection steel-plastic pipe with a full-antisepsis mechanism composed of an underground joint pipe, a PE pyrocondensation sleeve, a special bent pipe, etc. The utility model has the characteristics of corrosion resistance, antioxidation, sedimentation resistance, galvanic corrosion resistance, ultraviolet radiation resistance, long service life, etc., and is suitable for the mass production of a factory. The utility model has the advantages of low cost and convenient installation, and can widely reduce gas-leakage loss and decrease the transfusion difference rate and the gas-cutting rate of gas supply and the emergency rate of a pipeline. The utility model not only saves gas resource, but also avoids the great safety hidden trouble resulted from gas leakage. The utility model can ensure the normal life and the safety of people, and is an ideal gas guiding pipe (shot peg).

Description

High insulation anti-settling corrosion-resistant fuel gas inlet tube

One, technical field

The utility model belongs in the gas ductwork, user's inlet tube technical field of low pressure garden pipe network.

Two, background technique

At present, the underground pipe network and the surface pipeline network of China's pipeline gas industry adopt two kinds of rigid connections of steel pipe (as welding etc.) respectively, and user in the building is introduced in the combustion gas in the underground pipe net.The connecting tube of existing underground pipe network and surface duct (being that stub is introduced in gas service pipe or combustion gas), because seamless steel of underground employing and ground adopt Coating Steel Pipe to be welded through steel bend pipe, its joint and bury the anticorrosion of ground elbow and all adopt on-the-spot anticorrosion mode, after promptly at the scene completion being installed, twine adhesive tape and apply pitch or anticorrosion, jointing method etc. outside the seam of pipeline, mainly there are following shortcoming in this Placement and anticorrosion mode:

1. corrosion air-leakage accident rate height

In service in ventilation, owing to be subjected to the influence of environment (as weather, temperature, humidity, soil pH value etc.) and anticorrosion operator's factors such as sense of responsibility, make gas service pipe easily be caused the gas leakage accident of boring a hole by chemistry and electrolytic corrosion.According to statistics, the corrosion air-leakage accident of gas service pipe is taken up an area of 37% to 51% of gas pipe network accidents down, and average out to 42%, average 5 combustion gas underground pipe networks are speedily carried out rescue work in the accident, and just having 2 times is the corrosion air-leakage accident of gas service pipe.This shows that gas service pipe becomes link the weakest in the underground gas ductwork because of corrosion air-leakage.

2. working life is short

Be generally 3 years to 20 years the working life of existing gas service pipe (being stub), if meet rugged environment moist, low-lying or that pH value is bigger, only has 2 years to 5 years its working life, and working life is short.

3. rescue amount is big, the expense of speedily carrying out rescue work height

Because the accident rate height of gas service pipe, human and material resources, financial resources that making speedily carries out rescue work is spent are bigger, and the contingent fund of speedily carrying out rescue work is higher, and disposable direct cost can be up to more than 750 yuan.Simultaneously, also increase the gas stopping rate of domestic gas, reduced the quality of service of air feed unit, brought great inconvenience for the people's normal life.

4. air loss is big

Because the corrosion accident rate height of gas service pipe, the air loss of combustion gas is big.According to statistics, at least 20 ten thousand squares of the air losses in 7 years in somewhere are more than the cubic meter.And the gas service pipe that some is installed in than shelter (as dead angle, house, non-walkway etc.) or the corrosion scope is little, gas leakage is very little, it is undiscovered and not included in to leak gas for a long time.Gas leakage not only loses the combustion gas resource, but also befouling environment, and cause great potential safety hazard.

Three, summary of the invention

The purpose of this utility model provides a kind of high insulation anti-settling corrosion-resistant fuel gas inlet tube (stub), has high insulating property, anti-couple-corrosion, anti-sedimentation, corrosion-resistant, characteristics such as the life-span is long.

The purpose of this utility model is achieved in that a kind of high insulation anti-settling corrosion-resistant fuel gas inlet tube, mainly is made up of ground adaptor tube, PE thermal shrinkable sleeve, extraordinary bend pipe, underground adaptor tube etc.On the ground adaptor tube is a Coating Steel Pipe etc., and the one end is provided with screw thread so that is connected with surface duct, its in addition end insert in the end of extraordinary bend pipe the interference fit of maintenance certain-length, and on the ground outside the joint of adaptor tube and extraordinary bend pipe, the PE thermal shrinkable sleeve is set; Underground adaptor tube is a standard steel pipe etc., the one end inserts in the extraordinary bend pipe the other end, keeps the interference fit of certain-length, and outside the joint of underground adaptor tube and extraordinary bend pipe, the PE thermal shrinkable sleeve is set, the other end of underground adaptor tube and rigid connection of the underground steel pipe of combustion gas (as welding etc.); When if under ground piping is not steel pipe but PE pipe, underground adaptor tube and corresponding PE thermal shrinkable sleeve thereof then are not set, the lower end, ground of extraordinary bend pipe directly is connected with the combustion gas under ground piping with the special-purpose Placement (electric smelting butt joint or hot melt butt joint etc.) of PE pipe.Extraordinary bend pipe is to be bent by special PE pipe to form, special PE pipe is in PE raw material (combustion gas buried polyethylene material), add the special plastic anti-corrosion pipe that an amount of additive is made, so characteristic such as that extraordinary bend pipe has is anti-oxidant, ultraviolet radiation preventing, corrosion-resistant, anti-sedimentation, high insulation resistance, resistance electric current.

The utility model is the steel-plastic structure that steel-mould-steel connects, and outside steel is moulded the joint, the PE thermal shrinkable sleeve is set again.Therefore, the utility model is the full corrosion of a mechanism flexible steel in flat section tubing, so have decay resistance height, good insulation preformance, can block the potential difference and the electric current of surface duct and under ground piping effectively, prevents electrolytic corrosion; Flexibly connect, can eliminate the inside and outside stress that pipeline assembling and native salt backfilling compaction are produced, anti-differential settlement of buildings; Be suitable for factory and produce in batches, cost is low, quality and stable performance, on-the-spot simple installation; Be more than 30 years freedom from repairs working life.This has not only reduced the rescue rate of air loss, the transportation difference rate that has reduced air feed, gas stopping rate and pipeline significantly, saves the combustion gas resource, has also avoided the major safety risks that cause because of gas leakage, ensures the people's normal life and safety.The utility model is a gas service pipe (stub) desirable in the gas ductwork.

Four, description of drawings

Fig. 1 is the utility model profile schematic representation;

Fig. 2 is the utility model structural representation.

Among the figure: 1-is adaptor tube, 2-PE thermal shrinkable sleeve, the extraordinary bend pipe of 3-, the underground adaptor tube of 4-on the ground.

Five, embodiment

Below in conjunction with embodiment, further specify the utility model:

As shown in Figure 1, 2, a kind of high insulation anti-settling corrosion-resistant fuel gas inlet tube mainly is made up of ground adaptor tube 1, PE thermal shrinkable sleeve 2, extraordinary bend pipe 3, underground adaptor tube 4.On the ground adaptor tube 1 is 1 for caliber " galvanized welded steel pipe; the one end is provided with screw thread; so that is connected with the ground gas pipeline; its other end inserts in the end of extraordinary bend pipe 3; keep the interference fit of 800 millimeters long; also on the ground outside the joint of adaptor tube 1 and extraordinary bend pipe 3, put PE thermal shrinkable sleeve 2; Underground adaptor tube 4 is the standard seamless steel pipe of φ 32, the one end inserts in the other end of extraordinary bend pipe 3, keeps the interference fit of 200 millimeters long, and outside the joint of extraordinary bend pipe 3 and underground adaptor tube 4, put PE thermal shrinkable sleeve 2, the underground steel pipe welding of the other end of underground adaptor tube 4 and combustion gas.Extraordinary bend pipe 3 is bent by special PE pipe and forms, special PE pipe be combustion gas with the buried polyethylene material in, add an amount of additive and the special plastic anti-corrosion pipe made.

Claims

1. one kind high insulation anti-settling corrosion-resistant fuel gas inlet tube, mainly by ground adaptor tube (1), PE thermal shrinkable sleeve (2), underground adaptor tube (4) is formed, it is characterized in that also having extraordinary bend pipe (3), an end of adaptor tube (1) is provided with screw thread on the ground, the other end inserts and is interference fit in the extraordinary bend pipe (3), and on the ground outside the joint of adaptor tube (1) and extraordinary bend pipe (3), PE heat-shrink tube (2) is set, one end of underground adaptor tube (4) inserts and is interference fit in the other end of extraordinary bend pipe (3), and outside the joint of underground adaptor tube (4) and extraordinary bend pipe (3), PE thermal shrinkable sleeve (2) is set, the other end of underground adaptor tube (4) and rigid connection of the underground steel pipe of combustion gas; When if the ground gas pipeline is not steel pipe but PE pipe, underground adaptor tube (4) and corresponding PE thermal shrinkable sleeve (2) thereof are not set, special-purpose Placement is directly managed with PE in the lower end, ground of extraordinary bend pipe (3) be connected with the underground PE pipeline of combustion gas.

2. according to the described high insulation anti-settling corrosion-resistant fuel gas inlet tube of claim 1, it is characterized in that extraordinary bend pipe (3) is bent by special PE pipe to form, special PE pipe combustion gas with the buried polyethylene material in the adding additive make.