Reinforced concrete-steel lining combined structure pressure pipe
By casting a concrete layer on the outer circumference of the steel liner and setting a steel cage structure, the reinforced concrete-steel liner composite pressure pipe solves the problems of corrosion, scaling and deformation of urban water supply pipes, provides corrosion resistance and circumferential stiffness, and achieves high-quality pipes with low resistance and low pollution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN TIANEN CONCRETE CO LTD
- Filing Date
- 2025-09-08
- Publication Date
- 2026-07-21
AI Technical Summary
Existing urban water supply pipes are prone to corrosion, scaling, and microplastic shedding during operation, which affects water quality. Furthermore, flexible pipes are prone to deformation after installation, leading to structural damage.
The pressure pipe adopts a reinforced concrete-steel lining composite structure. By pouring a concrete layer on the outer circumference of the steel lining cylinder and setting a steel cage structure, combined with anchors and flexible interfaces, it provides corrosion resistance and circumferential stiffness, ensuring that the water quality is not polluted.
It achieves extremely low water flow resistance and excellent corrosion resistance, is suitable for deep burial and jacking construction, reduces project costs, and provides pressure pipes with excellent comprehensive performance, meeting drinking water hygiene requirements.
Smart Images
Figure CN224533697U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of reinforced concrete technology, specifically to a pressure pipe with a reinforced concrete-steel lining composite structure. Background Technology
[0002] The pipes used in urban water supply networks are all pressure pipes. In traditional applications, pressure pipes with working pressures exceeding 1.0 MPa are typically made of steel, while those with working pressures below 1.0 MPa include steel pipes, ductile iron pipes, concrete pipes, and plastic pipes. The working pressure of urban water supply networks generally does not exceed 1.0 MPa, and the commonly used pipe materials are mainly steel pipes, ductile iron pipes, plastic pipes, and concrete pipes. However, these pipe materials will experience water quality problems as their service life increases, as detailed below:
[0003] 1. Steel pipes are prone to rust and scaling. Rust mixed into tap water affects water quality.
[0004] 2. The lining material of ductile iron pipes is susceptible to scaling and detachment, which can affect water quality;
[0005] 3. The plastic pipes have a problem with microplastic shedding, which affects water quality;
[0006] 4. Scale easily forms on the inner wall of concrete pipes, affecting water quality.
[0007] According to relevant surveys on urban water environment, the pollution of tap water by pipeline projects has become one of the main factors affecting water quality.
[0008] In addition to the factors mentioned above, steel pipes, plastic pipes, and cast iron pipes are all flexible pipes, meaning that their circumferential stiffness is smaller than the deformation modulus of the surrounding soil. After installation, these pipes rely on the surrounding soil for circumferential support; otherwise, the vertical soil pressure on the top of the pipe can easily cause excessive deformation, or even structural damage such as buckling. In contrast, although concrete pipes have extremely high circumferential stiffness and can withstand larger vertical soil loads, they can be buried deeper in engineering practice, have lower requirements for the compaction of the backfill soil around the pipe, and are suitable for various construction techniques such as trenching and jacking. However, because concrete pipes are prone to scaling on their inner walls, long-term use can easily affect water quality, making them unsuitable for the role of drinking water pipes.
[0009] Therefore, we provide a pressure pipe with a reinforced concrete-steel lining composite structure. Utility Model Content
[0010] This utility model provides a reinforced concrete-steel lining composite pressure pipe. By pouring a concrete layer inside the outer circumference of the steel lining cylinder and setting a steel cage structure and anchors inside the concrete layer, the device can not only have extremely low water flow resistance, but also excellent corrosion resistance. It will not cause any pollution to the water quality during long-term operation. It is the best pipe material choice for municipal water supply pipelines, especially direct drinking water pipelines, and can solve the problem of municipal water pollution.
[0011] This utility model provides the following technical solution:
[0012] A reinforced concrete-steel lining composite pressure pipe includes a steel lining cylinder; anchors fixedly connected to the outer circumferential surface of the steel lining cylinder; a concrete layer poured on the circumferential surface of the steel lining cylinder to form an outer pipe structure, wherein a reinforcing cage structure is provided inside the concrete layer, and the reinforcing cage structure surrounds the outside of the steel lining cylinder to form a load-bearing state; and flexible joints provided at both ends of the steel lining cylinder.
[0013] As a preferred embodiment of this utility model, the anchor includes an umbrella-shaped anchor fixedly connected to the outer wall of the steel liner, with the top of the umbrella-shaped anchor facing the steel cage structure.
[0014] As a preferred technical solution of this utility model, the anchor includes an arc-shaped anchor fixedly connected to the outer wall of the steel liner, the arc-shaped anchor being in the shape of a "C".
[0015] As a preferred embodiment of this utility model, the anchor includes a Y-shaped anchor fixedly connected to the outer wall of the steel liner.
[0016] As a preferred technical solution of this utility model, the flexible interface includes steel slots and steel sockets respectively disposed at both ends of the steel liner.
[0017] As a preferred embodiment of this utility model, the thickness of the steel liner ranges from 1.5mm to 20mm.
[0018] As a preferred embodiment of this utility model, the thickness of the steel liner is 5mm.
[0019] As a preferred embodiment of this utility model, the steel liner is made of stainless steel or composite steel.
[0020] As a preferred technical solution of this utility model, the steel cage structure includes at least two sets of first connecting bars and second connecting bars, wherein the first connecting bars are arranged along the length direction of the steel liner, and the second connecting bars are arranged in a hollow ring structure and sleeved on the outside of the steel liner, and the first connecting bars are fixedly connected to the second connecting bars to form a closed loop structure.
[0021] As a preferred embodiment of this utility model, the thickness of the concrete layer ranges from 1 / 15 to 1 / 8 of its inner diameter.
[0022] Compared with the prior art, this utility model provides a reinforced concrete-steel lining composite pressure pipe, which has the following advantages:
[0023] 1. In this reinforced concrete-steel lining composite pressure pipe, the steel lining is made of stainless steel or carbon steel-stainless steel composite plate. The side that comes into contact with water is made of stainless steel. In addition to having extremely low water flow resistance, it also has excellent corrosion resistance. Long-term operation will not cause any pollution to the water quality. It is the best choice of pipe material for municipal water supply pipes, especially direct drinking water pipes, and solves the water pollution problem of municipal water supply pipes.
[0024] 2. In this reinforced concrete-steel lining composite pressure pipe, a larger flow rate can be provided under the condition that the diameter of the steel lining cylinder is fixed, and a smaller pipe diameter can be used under the condition that the flow rate demand is fixed, which can effectively reduce the construction cost of the project and make this device a high-quality pipe with extremely low water flow friction coefficient.
[0025] 3. This reinforced concrete-steel lined composite pressure pipe combines the impact and abrasion resistance of steel pipe with the hygiene, low friction and corrosion resistance of stainless steel material. It is suitable for use in environments such as deep burial and jacking construction, and is a pressure pipe with excellent comprehensive performance, making this device a pressure pipe with excellent comprehensive performance.
[0026] 4. In this reinforced concrete-steel lining composite pressure pipe, the steel cage structure provides greater circumferential stiffness, which allows for a significant reduction in the thickness of the steel lining. At the same time, the steel cage structure within 100mm of the concrete layer provides some of the bearing capacity against internal water pressure, further reducing the thickness of the steel lining. Since steel is much more expensive than reinforced concrete, especially stainless steel or carbon steel-stainless steel composite steel, which is 3-6 times more expensive than ordinary steel, the product using this technology has better overall economic efficiency.
[0027] 5. In this reinforced concrete-steel lining composite pressure pipe, after two sets of identical steel lining cylinders are connected, the interface is tightly connected by a steel flexible connector, so that the water surface of the device can meet the sanitary requirements for drinking water.
[0028] The parts of this device not covered herein are the same as or can be implemented using existing technologies. In addition to having extremely low water flow resistance, this utility model also has excellent corrosion resistance and will not cause any pollution to the water quality during long-term operation. It is the best choice of pipe material for municipal water supply pipelines, especially direct drinking water pipelines, and can solve the water pollution problem of municipal water supply pipelines.
[0029] Compared with the prior art, this utility model provides a reinforced concrete-steel lining composite pressure pipe, which has the following advantages:
[0030] 1. In this reinforced concrete-steel lining composite pressure pipe, the steel lining is made of stainless steel or carbon steel-stainless steel composite plate. The side that comes into contact with water is made of stainless steel. In addition to having extremely low water flow resistance, it also has excellent corrosion resistance. Long-term operation will not cause any pollution to the water quality. It is the best choice of pipe material for municipal water supply pipes, especially direct drinking water pipes, and solves the water pollution problem of municipal water supply pipes.
[0031] 2. In this reinforced concrete-steel lining composite pressure pipe, a larger flow rate can be provided under the condition that the diameter of the steel lining cylinder is fixed, and a smaller pipe diameter can be used under the condition that the flow rate demand is fixed, which can effectively reduce the construction cost of the project and make this device a high-quality pipe with extremely low water flow friction coefficient.
[0032] 3. This reinforced concrete-steel lined composite pressure pipe combines the impact and abrasion resistance of steel pipe with the hygiene, low friction and corrosion resistance of stainless steel material. It is suitable for use in environments such as deep burial and jacking construction, and is a pressure pipe with excellent comprehensive performance, making this device a pressure pipe with excellent comprehensive performance.
[0033] 4. In this reinforced concrete-steel lining composite pressure pipe, the steel cage structure provides greater circumferential stiffness, which allows for a significant reduction in the thickness of the steel lining. At the same time, the steel cage structure within 100mm of the concrete layer provides some of the bearing capacity against internal water pressure, further reducing the thickness of the steel lining. Since steel is much more expensive than reinforced concrete, especially stainless steel or carbon steel-stainless steel composite steel, which is 3-6 times more expensive than ordinary steel, the product using this technology has better overall economic efficiency.
[0034] 5. In this reinforced concrete-steel lining composite pressure pipe, after two sets of identical steel lining cylinders are connected, the interface is tightly connected by a steel flexible connector, so that the water surface of the device can meet the sanitary requirements for drinking water.
[0035] The parts of this device not covered herein are the same as or can be implemented using existing technologies. In addition to having extremely low water flow resistance, this utility model also has excellent corrosion resistance and will not cause any pollution to the water quality during long-term operation. It is the best choice of pipe material for municipal water supply pipelines, especially direct drinking water pipelines, and can solve the water pollution problem of municipal water supply pipelines. Attached Figure Description
[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
[0037] Figure 1 This is a schematic diagram of the cross-section of the present invention;
[0038] Figure 2 This is a schematic diagram of the longitudinal section of this utility model;
[0039] Figure 3 This is a schematic diagram of the steel liner of this utility model being connected.
[0040] Figure 4 This is a schematic diagram of the anchor of this utility model. Figure 1 ;
[0041] Figure 5 This is a schematic diagram of the anchor of this utility model. Figure 2 ;
[0042] Figure 6 This is a partial three-dimensional schematic diagram of the present invention.
[0043] In the diagram: 100, concrete layer; 200, steel liner; 201, steel socket; 202, steel slot; 300, steel cage structure; 301, first connecting bar; 302, second connecting bar; 400, anchor; 401, umbrella-shaped anchor; 402, bow-shaped anchor; 403, Y-shaped anchor. Detailed Implementation
[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0045] This utility model provides a reinforced concrete-steel lining composite pressure pipe, whose basic components mainly include a steel lining cylinder 200. A concrete layer 100 is poured onto the outside of the steel lining cylinder 200. This involves placing the assembled steel components into a mold and securing the mold. Concrete is mixed according to design requirements and poured into the mold to the desired position. The poured pipe is then cured while still in the mold, using either steam-accelerated curing or natural curing. After curing, the pipe is demolded, completing the pipe's shape. The concrete layer 100 on the outer circumference of the steel lining cylinder 200 serves as the outer pipe structure, and the concrete material is plastic concrete, which can be ordinary concrete, high-strength concrete, or ultra-high-performance concrete. The concrete strength grade should preferably be C40 or higher; when using ultra-high-performance concrete, the strength grade should be C100 or higher.
[0046] Example 1:
[0047] Reference Figures 1-3 and Figure 6 The steel cage structure 300 in this device includes two sets of first connecting bars 301 and second connecting bars 302. The first connecting bars 301 are arranged along the length of the steel liner 200, and the second connecting bars 302 are arranged in a hollow ring structure around the outside of the steel liner 200. The first connecting bars 301 are fixedly connected to the second connecting bars 302 to form a closed loop structure. The closed loop structure makes the steel cage structure 300 more stable and enhances its load-bearing capacity within the concrete layer 100. In addition, the staggered arrangement of the first connecting bars 301 and the second connecting bars 302 in the steel cage structure 300 effectively disperses the pressure and improves the compressive strength within the concrete layer 100. At the intersection of the first connecting bars 301 and the second connecting bars 302, reinforcing bars can also be provided or welded together to further enhance the structural strength of the steel cage structure 300.
[0048] Furthermore, the first connecting bar 301 and the second connecting bar 302 are located inside the plastic concrete, and are made of ordinary steel bars or non-prestressed high-strength steel bars. The steel cage can have 1, 2, 3 or more layers.
[0049] Specifically, an umbrella-shaped anchor 401, also known as an anchor 400, is installed within the concrete layer 100. The top of the umbrella-shaped anchor 401 faces the reinforcing cage structure 300. The umbrella-shaped anchor 401 is made of steel, and its dimensions and shape are described in [reference needed]. Figure 1 and Figure 2 The umbrella-shaped anchor 401 has a unique design with a sharp tip that expands outward to form an umbrella-like structure. This design allows the umbrella-shaped anchor 401 to be firmly embedded in plastic concrete and form a stable connection with the steel cage structure 300. The anchor 400 is made of stainless steel or carbon steel.
[0050] The steel cage structure 300 is made of ordinary steel bars or non-prestressed high-strength steel bars, and the steel cage structure 300 can have 1, 2 or more layers.
[0051] It should be explained that the steel liner 200 is assembled by butt welding of a cylinder body, a socket ring, and a spigot ring. The socket ring and spigot ring are made of shaped steel or processed from steel plates into the designed cross-sectional shape. Anchors 400 are welded to the outer surface of the steel liner 200 according to the designed number and distribution. The anchors 400 are made of steel, and their size and shape are one of umbrella-shaped anchors 401, bow-shaped anchors 402, or Y-shaped anchors 403. Furthermore, the reinforcing cage structure 300 is processed by a special roll welding machine or hand-woven. The first connecting rib 301 and the second connecting rib 302 can be designed with one, two, or more layers depending on parameters such as the pipe's burial depth and internal pressure. The reinforcing cage structure 300 and the steel liner 200 with welded anchors 400 are stacked and fixed in their designed positions to form a steel component. The assembled steel component is then placed into a mold and the mold is tightened. Concrete is mixed according to design requirements and poured into the mold to the designed position. The poured pipe body is then cured while still in the mold. Curing can be achieved using steam-accelerated curing or natural curing. After curing, the pipe is demolded, forming a reinforced concrete-steel liner composite pressure pipe. The completed pipe body is then decorated and marked according to technical requirements before inspection and storage. Once the concrete reaches the design strength, the pipe body can be shipped for use.
[0052] In the above scheme, a steel slot 202 is provided at one end of the steel liner 200, and a steel socket 201 is provided at the other end of the steel liner 200. The socket can be made of stainless steel or carbon steel-stainless steel composite plate. The thickness of the steel liner 200 is generally in the range of 1.5 to 20 mm depending on the pipe diameter. The thickness of the cylinder of this device is 5 mm or 10 mm.
[0053] Furthermore, the thickness of the steel liner 200 is generally 1 / 15 to 1 / 8 of the pipe diameter. In this device, the thickness of the steel liner 200 is 1 / 10 of the pipe diameter. This thickness design ensures sufficient structural strength to resist internal pressure while effectively controlling manufacturing costs, achieving a balance between economy and practicality. In addition, the surface of the steel liner 200 undergoes special treatments, such as sandblasting and acid pickling passivation, to improve its corrosion resistance and further extend the service life of the pressure pipe. Between the steel liner 200 and the concrete layer 100, one or more anti-corrosion layers, such as epoxy resin or fiberglass, are also installed to isolate moisture and corrosive media, protecting the steel liner 200 from corrosion.
[0054] Specifically, the steel liner 200 is made of stainless steel or composite steel. When two identical pipes are connected, the joint is connected by a steel flexible connector, that is, the steel slot 202 is inserted into the steel socket 201, and a sealing ring is fitted in the groove of the steel slot 202 to provide a sealing effect after the pipes are connected. The sealing ring is made of rubber and can be specified with a specific type and model according to the needs of use. The technical indicators include aging resistance, mechanical properties, and hygienic properties, so that the water surface of the device can meet the hygienic level required for drinking water.
[0055] Example 2:
[0056] Reference Figures 1-4 The design is basically the same as in Embodiment 1, except that the shape of the anchor 400 is changed. The anchor 400 is an arc-shaped anchor 402, which is C-shaped and its two ends are welded and fixed to the steel liner 200. With this design, the device can more effectively disperse and resist pressure when it is subjected to internal and external pressure.
[0057] Example 3:
[0058] Reference Figures 1-3 and Figure 5 Similar to Embodiment 1, the main difference is the shape of the anchor 400. The anchor 400 includes a Y-shaped anchor 403 fixedly connected to the outer wall of the steel liner 200. One branch of the Y-shaped anchor 403 is welded to the outer wall of the steel liner 200, and the other two branches can be welded to the reinforcing cage structure 300 to form a stable triangular support structure. This design not only enhances the stability and load-bearing capacity of the anchor 400, but also helps to distribute the pressure more effectively to the entire pipeline structure when the pipeline is subjected to internal and external pressure, thereby improving the overall pressure resistance of the pipeline.
[0059] In the above scheme, the steel liner 200 is made of stainless steel or carbon steel-stainless steel composite plate. The side that comes into contact with water is made of stainless steel. In addition to having extremely low water flow resistance, it also has excellent corrosion resistance. Long-term operation will not cause any pollution to the water quality. It is the best choice of pipe material for municipal water supply pipes, especially direct drinking water pipes, and solves the water pollution problem of municipal water supply pipes.
[0060] The steel liner 200 is made of stainless steel or carbon steel-stainless steel composite plate. The side that comes into contact with water is made of stainless steel, which has an extremely low coefficient of water flow friction. Under the condition of a fixed pipe diameter, the steel liner 200 can provide a larger flow rate. Under the condition of a fixed flow rate requirement, a smaller pipe diameter can be used, which can effectively reduce the construction cost of the project. This device is a high-quality pipe with an extremely low coefficient of water flow friction.
[0061] The product structure of this technology combines the impact and abrasion resistance of steel pipes with the hygiene, low friction and corrosion resistance of stainless steel. It is suitable for use in environments such as deep burial and jacking construction, and is a pressure pipe with excellent comprehensive performance, making this device a pressure pipe with excellent comprehensive performance.
[0062] The steel cage structure 300 of the product using this technology provides greater circumferential stiffness, which allows for a significant reduction in the thickness of the steel liner 200. At the same time, the steel cage structure 300 within the concrete layer 100 provides some of the bearing capacity against internal water pressure, further reducing the thickness of the steel liner 200. Since steel is much more expensive than reinforced concrete, especially stainless steel or carbon steel-stainless steel composite steel, which is 3-6 times more expensive than ordinary steel, the product using this technology has good overall economic efficiency.
[0063] Components not described in detail in this article are existing technologies.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A reinforced concrete-steel lining composite pressure pipe, characterized in that, include: Steel liner (200); Anchor (400) is fixedly connected to the outer circumferential surface of the steel liner (200); A concrete layer (100) is poured onto the circumference of the steel liner (200) to form an outer pipe structure. Among them, a steel cage structure (300) is provided inside the concrete layer (100), and the steel cage structure (300) surrounds the outside of the steel liner (200) to form a load-bearing state; Flexible interfaces are provided at both ends of the steel liner (200).
2. The reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The anchor (400) includes an umbrella-shaped anchor (401) fixedly connected to the outer wall of the steel liner (200), with the top of the umbrella-shaped anchor (401) facing the steel cage structure (300).
3. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The anchor (400) includes an arc-shaped anchor (402) fixedly connected to the outer wall of the steel liner (200), the arc-shaped anchor (402) being in the shape of a "C".
4. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The anchor (400) includes a Y-shaped anchor (403) fixedly connected to the outer wall of the steel liner (200).
5. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The flexible interface includes a steel slot (202) and a steel socket (201) respectively disposed at both ends of the steel liner (200).
6. A reinforced concrete-steel lining composite pressure pipe according to any one of claims 2-5, characterized in that, The thickness of the steel liner (200) ranges from 1.5mm to 20mm.
7. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The thickness of the steel liner (200) is 5 mm.
8. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The steel liner (200) is made of stainless steel or composite steel.
9. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The steel cage structure (300) includes at least two sets of first connecting bars (301) and second connecting bars (302). The first connecting rib (301) is arranged along the length of the steel liner (200), and the second connecting rib (302) is a hollow ring structure sleeved on the outside of the steel liner (200). The first connecting rib (301) is fixedly connected to the second connecting rib (302) to form a closed loop structure.
10. A reinforced concrete-steel lining composite pressure pipe according to claim 1, characterized in that, The thickness of the concrete layer (100) ranges from 1 / 15 to 1 / 8 of its inner diameter.