Leak-proof pressure conduit

Abstract

The utility model discloses a kind of anti-leakage pressure pipelines, belong to fluid conveying equipment technical field, to solve the problems of traditional pressure pipeline easy to be corroded, butt joint efficiency is low and leakage early warning is not timely. The pipeline includes composite pipe body, quick butt joint mechanism and leakage monitoring component, composite pipe body adopts three-layer structure of concrete inner cylinder, intermediate steel cylinder and prestressed composite material outer cylinder, is fixed by carbon fiber silk winding;Quick butt joint mechanism adopts adjustable clamp to realize pipeline accurate butt joint;Leakage monitoring component is in real time monitoring medium concentration in sealed cavity by gas sensor.The utility model is simple in structure, convenient to install, with high strength, corrosion resistance and safety early warning function, suitable for petroleum natural gas, city gas and other various fluid conveying scenes, significantly improve the operation safety of pressure pipeline and maintenance economy.

Description

Technical Field

[0001] This utility model belongs to the field of fluid transmission pressure pipeline technology, specifically relating to a leak-proof pressure pipeline. Background Technology

[0002] Pressure pipelines, as crucial fluid transport equipment, are widely used in energy, municipal, and other fields. Traditional pressure pipelines, such as prestressed concrete cylinder pipes (PCCP), suffer from insufficient durability and heavy weight, while pure steel pipes are susceptible to corrosion, leading to high maintenance costs. Furthermore, existing pipeline connection methods largely rely on manual calibration, which is inefficient, and leak detection methods are outdated, easily causing safety accidents. For example, PCCP pipes have a corrosion cracking rate of up to 12% within a 30-year service life, seriously affecting the safety of the transport system. Therefore, there is an urgent need to develop a new type of pressure pipeline with a simple structure, high strength, and safety early warning functions. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a leak-proof pressure pipeline with a simple structure, high strength, and safety early warning function.

[0004] This utility model is achieved through the following technical solution: A leak-proof pressure pipeline includes a composite pipe body, quick-connect mechanisms at both ends of the composite pipe body, and a leak monitoring component installed on the outer wall of the composite pipe body. The composite pipe body consists of a concrete inner cylinder, a middle steel cylinder, and a prestressed composite material outer cylinder, arranged coaxially and fixedly connected by an adhesive. The prestressed composite material outer cylinder is made of a mixture of glass fiber and epoxy resin, with glass fiber accounting for 50%-70% of the outer cylinder volume, and circumferential prestress is applied to the outer cylinder beforehand. The middle steel cylinder is made of Q235B steel with an elastic modulus of 206000MPa, a Poisson's ratio of 0.3, and a thickness of 5-10mm. The quick-connect mechanism includes symmetrically arranged semi-annular clamps, each with a rubber sealing gasket on its inner wall. The clamps are tightened at both ends by adjusting bolts, and an arc-shaped groove adapted to the outer wall of the pipeline is provided in the middle of the clamp. Two telescopic rods are fixedly connected to the outer side of the clamps. The two telescopic rods are arranged parallel to each other and can be adjusted by... The shortened rod length ensures coaxial alignment of the pipes to be connected. The leakage monitoring component includes a sealed cavity, a gas sensor, and a controller. The sealed cavity is fitted onto the outside of the joint of the composite pipe, and the gas sensor is fixed to the inner wall of the sealed cavity and connected to the external controller via a data cable. The sealed cavity is made of corrosion-resistant plastic, and its two ends are tightly fitted to the outer wall of the composite pipe through elastic sealing sleeves to form a sealed monitoring space. The outer wall of the composite pipe is wound with multiple layers of carbon fiber filaments, which are evenly distributed along the circumference of the pipe at a winding density of 5-8 turns per meter to enhance the overall structural integrity of the pipe. The inner concrete cylinder has an elastic modulus of 37000 MPa and a Poisson's ratio of 0.2. The inner wall is coated with a polytetrafluoroethylene anti-corrosion coating with a thickness of 1-3 mm. The clamp of the quick-connection mechanism is equipped with a positioning pin, and the flanges at both ends of the composite pipe have positioning holes that match the positioning pins. The positioning pins and positioning holes are fitted with a clearance fit to achieve precise positioning of the pipe connection.

[0005] The beneficial effects of this utility model are: With a simple and reasonable structure, the three-layer composite structure integrates the advantages of concrete, steel and composite materials, and has the advantages of high strength, lightweight and corrosion resistance, thus improving service life. The quick-connect mechanism requires no complex equipment and can be operated by a single person, improving installation efficiency and reducing labor costs; Leakage monitoring components enable real-time early warning, preventing leaks from escalating and are suitable for high-pressure, high-risk fluid transport scenarios. The overall design meets the national water network construction requirements for pipeline safety, reliability, efficiency, and intensive use, and has broad application prospects and economic value. Attached Figure Description

[0006] The present invention will now be described in further detail with reference to the accompanying drawings.

[0007] Figure 1 This is a cross-sectional view of the composite tube body described in this utility model.

[0008] Figure 2 This is a structural diagram of the present invention.

[0009] As shown in the figure: 1-Composite pipe body; 11-Concrete inner cylinder; 12-Intermediate steel cylinder; 13-Prestressed composite material outer cylinder; 2-Clamp; 21-Adjusting bolt; 3-Telescopic rod. Detailed Implementation

[0010] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0011] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0012] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be noted that the terms "comprising," "including," or any other variations are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0013] like Figure 1 , Figure 2The diagram shows a leak-proof pressure pipeline, comprising a composite pipe body 1, quick-connect mechanisms disposed at both ends of the composite pipe body 1, and a leak monitoring component installed on the outer wall of the composite pipe body 1; the composite pipe body 1 consists of a concrete inner cylinder 11, an intermediate steel cylinder 12, and a prestressed composite material outer cylinder 13, arranged coaxially and fixedly connected by an adhesive.

[0014] The prestressed composite material outer cylinder 13 is made of glass fiber and epoxy resin, with glass fiber accounting for 50%-70% of the outer cylinder volume, and circumferential prestress is applied to the outer cylinder in advance. The intermediate steel cylinder 12 is made of Q235B steel, with an elastic modulus of 206000MPa, a Poisson's ratio of 0.3, and a thickness of 5-10mm.

[0015] The quick docking mechanism includes symmetrically arranged semi-annular clamps 2, the inner wall of the clamps 2 is provided with a rubber sealing gasket, the two ends of the clamps 2 are fastened by adjusting bolts 21, and the middle of the clamps 2 is provided with an arc-shaped groove that is adapted to the outer wall of the pipe. Two telescopic rods 3 are fixedly connected to the outside of the clamp 2; the two telescopic rods 3 are arranged in parallel, and the coaxial alignment of the pipes to be connected is achieved by adjusting the length of the telescopic rods 3. The leakage monitoring component includes a sealed cavity, a gas sensor, and a controller. The sealed cavity is sleeved on the outside of the joint of the composite pipe 1, and the gas sensor is fixed to the inner wall of the sealed cavity and is connected to the external controller via a data cable. The sealed cavity is made of corrosion-resistant plastic, and its two ends are tightly fitted to the outer wall of the composite tube 1 through elastic sealing sleeves to form a closed monitoring space. The outer wall of the composite pipe 1 is wound with multiple layers of carbon fiber filaments. The carbon fiber filaments are evenly distributed along the circumference of the pipe, and the winding density is 5 to 8 turns per meter, which is used to enhance the overall structure of the pipe. The concrete inner cylinder 11 has an elastic modulus of 37000MPa and a Poisson's ratio of 0.2. The inner wall is coated with a polytetrafluoroethylene anti-corrosion coating with a thickness of 1-3mm. The clamp 2 of the quick docking mechanism is equipped with a positioning pin, and the flanges at both ends of the composite pipe body 1 are provided with positioning holes that are compatible with the positioning pin. The positioning pin and the positioning hole are fitted with a clearance to achieve precise positioning of the pipe docking.

[0016] Work steps: Composite pipe body 1 design: adopts a three-layer composite structure. The inner concrete cylinder 11 provides a pressure-resistant channel, the middle steel cylinder 12 serves as a support layer, and the prestressed composite material outer cylinder 13 bears the main circumferential tensile force. The prestress is controlled by the thick-walled cylinder theory to offset the internal pressure tensile stress and reduce the risk of cracking. Quick-connection mechanism: The combination of adjustable clamp 2 and telescopic rod 3 enables quick coaxial connection of pipes. Rubber sealing gasket enhances the sealing of the connection, and positioning pin ensures the connection accuracy, greatly improving installation efficiency.

[0017] Leakage monitoring component: The sealed cavity surrounds the joint, and the gas sensor monitors the medium leakage in real time. The controller issues an early warning signal in a timely manner, giving maintenance personnel more time to deal with the situation and reducing resource waste and safety hazards.

[0018] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A leak-proof pressure pipeline, characterized in that: It includes a composite pipe body (1), quick docking mechanisms set at both ends of the composite pipe body (1), and a leakage monitoring component installed on the outer wall of the composite pipe body (1); the composite pipe body (1) consists of a concrete inner cylinder (11), an intermediate steel cylinder (12) and a prestressed composite material outer cylinder (13) from the inside to the outside, and the three layers are coaxially arranged and fixedly connected by adhesive.

2. The leak-proof pressure pipeline according to claim 1, characterized in that: The intermediate steel cylinder (12) is made of Q235B steel with an elastic modulus of 206000MPa, a Poisson's ratio of 0.3, and a thickness of 5-10mm.

3. A leak-proof pressure pipeline according to claim 1, characterized in that: The quick docking mechanism includes symmetrically arranged semi-circular clamps (2), the inner wall of the clamps (2) is provided with rubber sealing gaskets, the two ends of the clamps (2) are fastened by adjusting bolts (21), and the middle of the clamps (2) is provided with an arc-shaped groove that is adapted to the outer wall of the pipe.

4. A leak-proof pressure pipeline according to claim 3, characterized in that: Two telescopic rods (3) are fixedly connected to the outside of the clamp (2); the two telescopic rods (3) are set in parallel, and the coaxial alignment of the pipes to be connected is achieved by adjusting the length of the telescopic rods (3).

5. A leak-proof pressure pipeline according to claim 1, characterized in that: The leakage monitoring component includes a sealed cavity, a gas sensor, and a controller. The sealed cavity is fitted onto the outside of the joint of the composite pipe (1). The gas sensor is fixed to the inner wall of the sealed cavity and is connected to the external controller via a data cable.

6. A leak-proof pressure pipeline according to claim 5, characterized in that: The sealed cavity is made of corrosion-resistant plastic, and its two ends are tightly fitted to the outer wall of the composite tube (1) through elastic sealing sleeves to form a closed monitoring space.

7. A leak-proof pressure pipeline according to claim 1, characterized in that: The outer wall of the composite pipe (1) is wound with multiple layers of carbon fiber filaments. The carbon fiber filaments are evenly distributed along the circumference of the pipe, and the winding density is 5 to 8 turns per meter, which is used to enhance the overall structure of the pipe.

8. A leak-proof pressure pipeline according to claim 1, characterized in that: The concrete inner cylinder (11) has an elastic modulus of 37000MPa and a Poisson's ratio of 0.

2. The inner wall is coated with a polytetrafluoroethylene anti-corrosion coating with a thickness of 1-3mm.

9. A leak-proof pressure pipeline according to claim 1, characterized in that: The clamp (2) of the quick docking mechanism is provided with a positioning pin, and the flanges at both ends of the composite pipe (1) are provided with positioning holes that are compatible with the positioning pin. The positioning pin and the positioning hole are fitted with a clearance to achieve precise positioning of the pipe docking.

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