CN108253205B - Pipeline and assembly thereof - Google Patents
Pipeline and assembly thereof Download PDFInfo
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- CN108253205B CN108253205B CN201611238171.3A CN201611238171A CN108253205B CN 108253205 B CN108253205 B CN 108253205B CN 201611238171 A CN201611238171 A CN 201611238171A CN 108253205 B CN108253205 B CN 108253205B
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- metal cylinder
- outer metal
- pipe
- pipeline
- peripheral surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/153—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to the field of pipelines for conveying fluids such as water and oil, and discloses a pipeline and an assembly thereof, wherein the pipeline comprises an inner metal cylinder (1) and an outer metal cylinder (3) which are sleeved together, a radial gap is arranged between the inner metal cylinder (1) and the outer metal cylinder (3), and a connecting layer (2) for connecting the inner metal cylinder (1) and the outer metal cylinder (3) is arranged in the radial gap. The pipeline of the invention can bear high internal pressure and high external pressure, has good impermeability and durability, and has lower manufacturing cost.
Description
Technical Field
The present invention relates to a pipe for fluids such as water, oil and the like, and an assembly thereof.
Background
The piping is used in a wide variety of applications, mainly in water supply, water drainage, heat supply, gas supply, long distance transportation of petroleum and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. Taking a water pipe as an example, the water pipe is a water pipe which is used for conveying water from a reservoir, a pressure regulating chamber, a front pool to a water turbine or from a water pump to a high position and is buried at the bottom of a dam body of an earth-rock dam, under the ground or in the open air. The water-saving device can be used for irrigation, hydroelectric generation, town water supply, water drainage, sediment discharge, reservoir emptying, flood discharge by combining construction diversion with spillway, and the like.
In long-distance and large-flow diversion and regulation projects, the selection of pipes is critical, and is not only the key for ensuring the safety of a water supply system, but also the decision of the project cost and the operation expense. At present, pipelines for water delivery in China mainly comprise steel pipes, spheroidal graphite cast iron pipes, prestressed steel cylinder concrete pipes and sand inclusion glass steel pipes. However, each of these tubes has drawbacks, which are manifested by: the steel pipe has high manufacturing cost, poor external pressure resistance and complex construction process; the cost per unit length of the ductile cast iron pipe is high, the connection mode is complex, the ductile cast iron pipe is heavy, and the pipe diameter is smaller; the sand inclusion glass fiber reinforced plastic pipe is a flexible pipeline, has poor external pressure resistance, has high requirement on groove backfill, and has limited use amount and application; the prestressed steel cylinder concrete pipe is wound with one or more layers of prestressed steel wires on the outer wall of the concrete pipe core to bear higher internal water pressure and external load, and the outside of the prestressed steel wires is protected by dry mortar, so that the corrosion resistance is relatively poor, the pipe explosion failure condition continuously occurs, and the durability of the pipe is poor.
Therefore, development of a pipeline capable of bearing high internal pressure and high external pressure, good in durability and low in cost is urgently needed to overcome the problem that the pipeline is difficult to select in the current engineering design and construction.
Disclosure of Invention
The present invention aims to solve the above-mentioned drawbacks and provide a pipe and its components, which can withstand high internal pressure and high external pressure, has good impermeability and durability, and is low in cost.
In order to achieve the above object, the present invention provides a pipe comprising an inner metal cylinder and an outer metal cylinder which are sleeved together, wherein a radial gap is provided between the inner metal cylinder and the outer metal cylinder, and a connecting layer for connecting the inner metal cylinder and the outer metal cylinder is provided in the radial gap.
Preferably, the connection layer comprises a concrete layer poured in the radial gap.
Preferably, the connecting layer further comprises a connecting rib for connecting the inner metal cylinder and the outer metal cylinder.
Preferably, the connecting ribs comprise first connecting ribs connected to the outer peripheral surface of the inner metal cylinder and second connecting ribs connected to the inner peripheral surface of the outer metal cylinder, the first connecting ribs and the second connecting ribs can form overlapping areas in a staggered mode in the radial gaps, and the axial reinforcing steel passes through the overlapping areas and is fixedly connected with the connecting ribs.
Preferably, the first connection rib and the second connection rib are each formed in a "U" shape, a "V" shape or an "L" shape in the axial direction of the pipe, and have a radial dimension smaller than the radial distance of the radial gap.
Preferably, the two ends of the pipeline are respectively provided with a reinforcing rib, the reinforcing ribs are shaped like a straight line, one end of each reinforcing rib is connected with the outer peripheral surface of the inner metal cylinder, and the other end of each reinforcing rib is connected with the inner peripheral surface of the outer metal cylinder.
Preferably, one end of the connecting rib is connected with the outer circumferential surface of the inner metal cylinder, and the other end is connected with the inner circumferential surface of the outer metal cylinder.
Preferably, the connection rib is formed in a "straight" shape or a wave shape in an axial direction of the pipe.
Preferably, the connecting ribs are multiple and are radially arranged.
Preferably, the connecting ribs are a plurality of and are arranged in a straight line along the axial direction and the radial direction of the pipeline.
Preferably, the connection layer further comprises a reinforcing mesh or glass fiber reinforcement arranged along the circumferential and/or axial direction of the pipe.
Preferably, an inner anti-corrosion layer is arranged on the inner peripheral surface of the inner metal cylinder, and an outer anti-corrosion layer is arranged on the outer peripheral surface of the outer metal cylinder.
Preferably, the inner anti-corrosion layer and the outer anti-corrosion layer are made of anti-rust paint, asphalt materials, concrete, cement mortar or resin, and are coated on the inner circumferential surface of the inner metal cylinder and the outer circumferential surface of the outer metal cylinder.
Preferably, the inner metal cylinder and the outer metal cylinder are steel cylinders or ductile iron cylinders.
The present invention also provides a pipe assembly comprising a plurality of pipes as described above, each pipe further comprising a pipe joint comprising:
A socket ring welded to one end of the inner circumferential surface of the outer metal tube and extending outwardly in the axial direction of the outer metal tube; and
The socket ring is welded at the end part of the other end of the outer metal cylinder and is matched with the bell ring;
wherein, the bell mouth ring of one pipeline is connected with the spigot ring of the adjacent pipeline.
Through the technical scheme, the pipeline can bear high internal pressure and high external pressure when conveying fluids such as water, oil and the like, has good impermeability and durability, has lower manufacturing cost, and solves the problem of difficult pipeline type selection in the current engineering design and construction.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of one embodiment of the pipe of the present invention wherein the connecting ribs are formed in a "U" shape;
FIG. 2 is an enlarged view of a portion of the tie layer of FIG. 1;
FIG. 3 is a schematic cross-sectional view of another embodiment of the conduit of the present invention wherein the connecting ribs are formed in an "L" shape;
FIG. 4 is an enlarged view of a portion of the tie layer of FIG. 3;
fig. 5 is a cross-sectional view A-A of fig. 1, but omitting the axially symmetrical other half of the pipe.
Description of the reference numerals
1. Inner metal tube 2 connecting layer
3. Outer metal cylinder 4 connecting rib
5. Overlap zone 6 axial rebar
7. Inner anticorrosive layer 8 outer anticorrosive layer
9. Socket ring 10 and spigot ring
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The invention provides a pipeline, which comprises an inner metal cylinder 1 and an outer metal cylinder 3 sleeved together, wherein a radial gap is arranged between the inner metal cylinder 1 and the outer metal cylinder 3, and a connecting layer 2 (see figure 5) for connecting the inner metal cylinder 1 and the outer metal cylinder 3 is arranged in the radial gap.
For the pipelines capable of bearing high internal pressure and high external pressure, the conventional pipes in the engineering are prestressed steel cylinder concrete pipes and concrete-encased steel pipes, but the conditions of corrosion damage and pipe explosion failure of the prestressed steel wires of the prestressed steel cylinder concrete pipes occur continuously, and the concrete-encased steel pipes are combined structures of steel pipes, cushion layers and encased concrete, so that on-site formwork pouring is required, and industrial production cannot be realized. The invention can make the pipeline bear high internal pressure and high external pressure by adopting the combined type bimetal tube pipeline, and the pipeline can realize quick assembly, is convenient for mechanized operation, has large and small caliber and wide application range.
In the present invention, the connection layer 2 comprises a concrete layer poured in the radial gap between the inner metal cylinder 1 and the outer metal cylinder 3. The concrete layer can make the inner metal cylinder and the outer metal cylinder form a whole, and the whole compressive resistance of the concrete layer is enhanced.
In order to strengthen the bonding strength between the concrete layer and the inner and outer metal cylinders, the connecting layer 2 further comprises connecting ribs 4 for connecting the inner metal cylinder 1 and the outer metal cylinder 3. The connecting rib 4 can be used as a shear steel bar of a concrete layer, and ensures that the inner and outer metal cylinders and the concrete layer form an integral stress system, so that the whole pipeline has impermeability and internal pressure resistance and good external pressure resistance. Wherein the thickness of the inner and outer metal cylinders and the concrete layer can be adjusted according to the requirement.
The stress condition of the pipeline of the invention is specifically described below: according to the structural stress characteristics of the metal cylinder and the concrete material, the connecting ribs are arranged between the inner metal cylinder and the outer metal cylinder, and concrete is poured, so that the inner metal cylinder and the outer metal cylinder are tightly combined with the concrete layer through the connecting ribs to form a whole, and the stress is combined; the inner and outer metal cylinders can bear the internal pressure together through the force transmission effect of the concrete, so that the characteristics of high internal pressure resistance and seepage prevention of the metal cylinders are fully exerted; the concrete has stronger external pressure resistance, but the tensile capacity is poor, and the invention combines the inner metal cylinder and the outer metal cylinder together by arranging the connecting ribs, which are equivalent to the compression and tension steel bars of the pipeline, and has stronger external pressure resistance compared with a pure steel pipe. In addition, the pipeline fully plays the respective advantages of the materials, can verify the transmission condition of the internal pressure through theoretical calculation and experiments, has definite stress under different working conditions, does not cause the waste of the materials or unreasonable stress structure, and has strong feasibility.
According to an embodiment of the present invention, the connecting rib 4 may include a first connecting rib connected to the outer circumferential surface of the inner metal tube 1 and a second connecting rib connected to the inner circumferential surface of the outer metal tube 3, the first connecting rib and the second connecting rib may be staggered in the radial gap to form an overlapping region 5, and an axial reinforcing steel bar 6 passes through the overlapping region 5 and is fixedly connected with the connecting rib 4.
Preferably, the first and second connection ribs are each formed in a "U" shape, a "V" shape or an "L" shape in the axial direction of the pipe, and have a radial dimension smaller than the radial distance of the radial gap (see fig. 1 to 4). It should be understood that the shape of the first connecting rib and the second connecting rib is not limited to "U" shape, "V" shape or "L" shape, and it is within the scope of the present invention as long as it can form an overlapping area between the radial gaps of the inner and outer metal cylinders for inserting the axial reinforcing steel bars. Of course, the first connecting ribs, the second connecting ribs and the axial reinforcing steel bars are arranged to further strengthen the connection between the inner metal cylinder and the outer metal cylinder and the concrete layer, so that other modes capable of strengthening the connection between the inner metal cylinder and the outer metal cylinder and the concrete layer are also within the protection scope of the invention.
According to another embodiment of the invention, a first connecting rib connected to the outer peripheral surface of the inner metal cylinder 1 and a second connecting rib connected to the inner peripheral surface of the outer metal cylinder 3 are arranged in a radial gap of the middle part of the pipeline, the first connecting rib and the second connecting rib can be staggered in the radial gap to form an overlapping area 5, and an axial reinforcing steel bar 6 passes through the overlapping area 5 and is fixedly connected with the first connecting rib and the second connecting rib; reinforcing ribs are respectively arranged in radial gaps at two ends of the pipeline, the reinforcing ribs are shaped like a straight line, one end of each reinforcing rib is connected with the outer peripheral surface of the inner metal cylinder 1, and the other end of each reinforcing rib is connected with the inner peripheral surface of the outer metal cylinder 3. By adopting the combination mode, the space between the inner metal cylinder and the outer metal cylinder can be fixed, which is beneficial to keeping the space between the inner metal cylinder and the outer metal cylinder when concrete is poured.
According to still another embodiment of the present invention, one end of the connecting rib 4 is connected to the outer circumferential surface of the inner metal tube 1, and the other end is connected to the inner circumferential surface of the outer metal tube 3. Preferably, the connection rib 4 is formed in a straight shape or a wave shape in the axial direction of the pipe. According to the embodiment, the inner metal cylinder and the outer metal cylinder are directly connected by adopting the straight-line or wavy connecting ribs, so that the connecting strength is high. Of course, the "in-line" connecting ribs may also be in a zigzag shape (i.e., a plurality of "in-line" connecting ribs are connected (or folded) into a "W" shape), each of which is welded with the outer circumferential surface of the inner metal tube and the inner circumferential surface of the outer metal tube, respectively.
As one preferable example of each of the above embodiments, the plurality of connection ribs 4 are radially provided.
As another preferable aspect, the plurality of connection ribs 4 are arranged in a straight line (or an approximate straight line) along the axial direction and the radial direction of the pipe.
In the actual construction process, the diameter and the distribution density of the connecting ribs 4 should be capable of meeting the requirements of shearing resistance and tensile resistance, and ensuring that the connecting ribs have enough strength to transmit tensile force when the inner (or outer) metal cylinder breaks water pressure (when the pipeline is used for water delivery) and enters the concrete layer. In the invention, the connecting bars are used as shear steel bars, and the diameters and the number of the connecting bars meet the requirements of the current effective concrete specification. According to theoretical calculation, in order to make the inner metal cylinder, the outer metal cylinder and the connecting layer bear force together, the number of the connecting ribs can replace the tensile strength of the concrete, and thinner connecting ribs are adopted as much as possible.
In the present invention, since the inner metal tube, the outer metal tube, and the connecting ribs and concrete layers therebetween are commonly subjected to internal and external pressures, in order to enable the pipe to withstand higher internal and external pressures, the connecting layer 2 may further include a reinforcing mesh or glass fiber ribs disposed along the circumferential direction and/or axial direction of the pipe. Wherein, inner and outer metal cylinders and circumferential reinforcing steel bar mesh (glass fiber reinforced plastic, carbon fiber reinforced plastic and other materials) or glass fiber reinforced plastic are used as stress members for bearing internal pressure, the concrete layer plays roles of transmitting radial pressure and bearing shearing force, and the connecting bars connect the members into a whole, so that the members together form a main structure for bearing external pressure, and meanwhile, the concrete layer also provides an alkaline environment for the inner and outer metal cylinders, thereby playing an anti-rust role.
An inner anticorrosive layer 7 is provided on the inner peripheral surface of the inner metal tube 1, and an outer anticorrosive layer 8 is provided on the outer peripheral surface of the outer metal tube 3. Wherein the inner anti-corrosion layer 7 and the outer anti-corrosion layer 8 are made of anti-rust paint, asphalt materials, concrete, cement mortar or resin, and the like, and are coated on the inner peripheral surface of the inner metal cylinder 1 and the outer peripheral surface of the outer metal cylinder 3. Of course, other types of corrosion and rust resistant materials may be used as the corrosion resistant layer.
In the present invention, the inner metal cylinder 1 and the outer metal cylinder 3 may be steel cylinders or ductile cast iron cylinders, etc.
In order to make the pipe have any length to adapt to various different demands, the invention also provides a pipe assembly, which comprises a plurality of pipes as described above, each pipe further comprises a pipe joint, the pipe joint comprises a socket ring 9 and a spigot ring 10, the socket ring 9 is welded on one end of the inner circumferential surface of the outer metal cylinder 3 and extends outwards along the axial direction of the outer metal cylinder 3, the spigot ring 10 is welded on the end of the other end of the outer metal cylinder 3 and is matched with the socket ring 9, and in the pipe assembly, the socket ring 9 of one pipe is connected with the spigot ring 10 of the adjacent pipe. The pipe also includes a pipe joint as a connection and seal for the pipe. In addition, a rubber ring can be additionally arranged at the joint of the bell ring 9 and the spigot ring 10 to realize the sealing connection of the pipelines. Wherein, the bell mouth ring and the spigot ring can be made of stainless steel materials.
The method for preparing the pipeline according to the invention is described in detail by way of examples:
Example 1
A. preparation of socket ring
Is prepared from bell and spigot steel plate through shearing, blanking, rolling, welding, edging, shaping and expanding.
B. preparation of inner and outer metal cylinders (Steel cylinders are used as examples)
And c, mounting the bell and spigot rings processed in the step a on a spiral cylinder making machine, rolling the coiled plate into a steel cylinder according to design requirements, rolling and welding at the same time, welding the bell and spigot rings and the steel cylinder at one time to form, and then carrying out a pressing test to determine whether leakage points exist.
C. welding of connecting ribs and installation of inner and outer steel cylinders
And welding the first connecting rib on the outer peripheral surface of the inner steel cylinder, welding the second connecting rib on the inner peripheral surface of the outer steel cylinder, sleeving the inner steel cylinder and the outer steel cylinder together, enabling the first connecting rib and the second connecting rib to form an overlapping area in the radial gap in a staggered manner by rotating the inner steel cylinder and the outer steel cylinder, inserting the axial reinforcing steel bars in the overlapping area, and binding and fixing the axial reinforcing steel bars on the connecting ribs.
D. and fixedly connecting a reinforcing mesh or glass fiber reinforced plastic on the outer circumferential surface of the inner steel cylinder or the inner circumferential surface of the outer steel cylinder along the circumferential direction and/or the axial direction of the pipeline, casting concrete in the radial gap, and compacting and forming the concrete through high-frequency strong vibration.
E. and (3) coating anti-corrosion layers on the inner circumferential surface of the inner steel cylinder and the outer circumferential surface of the outer steel cylinder to obtain the pipeline.
Example 2
A. preparation of socket ring
Is prepared from bell and spigot steel plate through shearing, blanking, rolling, welding, edging, shaping and expanding.
B. preparation of inner and outer metal cylinders (Steel cylinders are used as examples)
And c, mounting the bell and spigot rings processed in the step a on a spiral cylinder making machine, rolling the coiled plate into a steel cylinder according to design requirements, rolling and welding at the same time, welding the bell and spigot rings and the steel cylinder at one time to form, and then carrying out a pressing test to determine whether leakage points exist.
C. welding of connecting ribs and installation of inner and outer steel cylinders
The inner steel cylinder and the outer steel cylinder are sleeved together, and two ends of the straight or wavy connecting ribs are welded on the outer peripheral surface of the inner steel cylinder and the inner peripheral surface of the outer steel cylinder respectively by using a mechanical arm welding machine.
D. and fixedly connecting a reinforcing mesh or glass fiber reinforced plastic on the outer circumferential surface of the inner steel cylinder or the inner circumferential surface of the outer steel cylinder along the circumferential direction and/or the axial direction of the pipeline, casting concrete in the radial gap, and compacting and forming the concrete through high-frequency strong vibration.
E. and (3) coating anti-corrosion layers on the inner circumferential surface of the inner steel cylinder and the outer circumferential surface of the outer steel cylinder to obtain the pipeline.
According to the invention, the inner metal cylinder and the outer metal cylinder are sleeved together, the connecting ribs are arranged between the inner metal cylinder and the outer metal cylinder, and concrete or other structural materials (such as resin mortar, cement mortar and the like) are poured, so that the metal cylinder and the concrete are firmly combined, the whole body is always kept, and the integrity under stress is ensured. The waterproof and waterproof device not only exerts the advantage of the waterproof reliability of the metal cylinder, but also exerts the advantage of external pressure resistance of reinforced concrete. In addition, the concrete has long service life, and a stainless environment is created for the connecting ribs inside the concrete and the inner and outer metal cylinders contacted with the concrete. The pipeline of the invention bears the structural materials of each layer together when being stressed, and the respective advantages of the materials are fully exerted. The structure can give full play to the strength of the metal cylinder, bear higher internal pressure and bear external pressure together with concrete, solves the problem of external pressure instability of the existing steel pipe, can effectively reduce the wall thickness of the steel pipe relative to the steel pipe paved independently, prolongs the service life by times, saves investment, and has wider application range.
In addition, the pipeline of the invention has the following advantages: the mechanical operation degree is high, the pipeline is prefabricated by a pipe mill and then is transported to site construction, so that quick assembly is realized, the design concept of energy conservation and environmental protection is met, the construction period can be saved, and the efficiency is improved; the method is applicable to water delivery engineering with large caliber, high internal pressure and high earthing; the durability is good, the concrete structure is positioned between the inner metal cylinder and the outer metal cylinder, no great harm is generated even if the concrete structure cracks, and after the pipeline is coated with the anti-corrosion layer, the durability of the pipeline structure can be better ensured, the reliability of the pipeline is high, and the service life is long; the invention adopts the concrete pipeline type with the double metal cylinders, fully utilizes the characteristic of good impermeability of the metal cylinders, and ensures that the pipeline structure has better impermeability.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (7)
1. The pipeline is characterized by comprising an inner metal cylinder (1) and an outer metal cylinder (3) which are sleeved together, wherein a radial gap is formed between the inner metal cylinder (1) and the outer metal cylinder (3), and a connecting layer (2) for connecting the inner metal cylinder (1) and the outer metal cylinder (3) is arranged in the radial gap; the connecting layer (2) comprises a concrete layer poured in the radial gap; the connecting layer (2) further comprises connecting ribs (4) for connecting the inner metal cylinder (1) and the outer metal cylinder (3); the connecting ribs (4) comprise first connecting ribs connected to the outer peripheral surface of the inner metal cylinder (1) and second connecting ribs connected to the inner peripheral surface of the outer metal cylinder (3), and the first connecting ribs and the second connecting ribs are formed into a U shape, a V shape or an L shape in the axial direction of the pipeline; after the inner metal cylinder (1) connected with the first connecting rib and the outer metal cylinder (3) connected with the second connecting rib are sleeved, the first connecting rib and the second connecting rib are staggered in the radial gap to form an overlapping area (5) through rotating the inner metal cylinder (1) and the outer metal cylinder (3), and an axial reinforcing steel bar (6) is inserted into the overlapping area (5) and fixedly connected with the connecting rib (4).
2. A pipe according to claim 1, characterized in that the pipe is provided with reinforcing ribs at both ends thereof, respectively, which are formed in a "straight" shape, and one end is connected to the outer peripheral surface of the inner metal tube (1) and the other end is connected to the inner peripheral surface of the outer metal tube (3).
3. A pipe according to claim 1, characterized in that the connection layer (2) further comprises a mesh reinforcement or glass fiber reinforcement arranged circumferentially and/or axially of the pipe.
4. The pipeline according to claim 1, characterized in that an inner anti-corrosion layer (7) is provided on the inner peripheral surface of the inner metal cylinder (1), and an outer anti-corrosion layer (8) is provided on the outer peripheral surface of the outer metal cylinder (3).
5. The pipeline according to claim 4, characterized in that the inner anticorrosive layer (7) and the outer anticorrosive layer (8) are made of rust-proof paint, asphalt material, concrete, cement mortar or resin, and are coated on the inner peripheral surface of the inner metal cylinder (1) and the outer peripheral surface of the outer metal cylinder (3).
6. A pipe according to any one of claims 1-5, characterized in that the inner metal cylinder (1) and the outer metal cylinder (3) are steel cylinders or ductile iron cylinders.
7. A pipe assembly comprising a plurality of pipes according to any of claims 1-6, each pipe further comprising a pipe joint, said pipe joint comprising:
A socket ring (9), wherein the socket ring (9) is welded to one end of the inner peripheral surface of the outer metal cylinder (3) and extends outwards along the axial direction of the outer metal cylinder (3); and
A socket ring (10), wherein the socket ring (10) is welded at the end part of the other end of the outer metal cylinder (3) and is matched with the bell ring (9);
Wherein the socket ring (9) of one pipeline is connected with the socket ring (10) of the adjacent pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238171.3A CN108253205B (en) | 2016-12-28 | 2016-12-28 | Pipeline and assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238171.3A CN108253205B (en) | 2016-12-28 | 2016-12-28 | Pipeline and assembly thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108253205A CN108253205A (en) | 2018-07-06 |
| CN108253205B true CN108253205B (en) | 2024-05-14 |
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| CN201611238171.3A Active CN108253205B (en) | 2016-12-28 | 2016-12-28 | Pipeline and assembly thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024041336A1 (en) * | 2022-08-25 | 2024-02-29 | 南京大得钢管有限公司 | Large-diameter spirally welded steel pipe with composite structural wall, and manufacturing method therefor |
| CN115978311A (en) * | 2022-12-14 | 2023-04-18 | 中国电力工程顾问集团西北电力设计院有限公司 | Double-steel-lining-reinforced concrete prefabricated combined structure pressure pipe and construction method thereof |
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