Fiber-reinforced ultra-high performance concrete composite interlayer water delivery pipeline

Abstract

The utility model discloses a fiber reinforced ultra-high performance concrete composite interlayer water pipe, which comprises two pipe bodies connected with each other and a joint sealing structure formed at the joint of the two pipe bodies, each pipe body comprises a pipe outer layer, a pipe inner layer, a grid layer and a concrete layer, the pipe outer layer is sleeved on the periphery of the pipe inner layer, and the grid layer is sleeved on the periphery of the concrete layer. A cavity is correspondingly formed between the outer pipe layer and the inner pipe layer, the grid layer is arranged in the cavity in the length direction of the pipeline body, and the cavity is filled with the concrete layer. The pipeline body is formed by the pipe layers with different performances, the structure of each part of the pipeline body is reasonably configured, and the structure of the pipeline body is optimized, so that the pipeline is wide in application range, has the advantages of light self weight, corrosion resistance, leakage prevention and high bearing capacity, and can be applied to various complex construction environments and use scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a fiber-reinforced ultra-high performance concrete composite sandwich water delivery pipeline. Background Art

[0002] Water supply or drainage pipelines are related to major issues of urban domestic water and sewage discharge, and are of great significance to urban flood control and drainage, fire water, industrial water, and large-scale water supply projects. Early handmade pipes were mainly used to transport water and liquids, because the materials of the pipes limited their scope of use. With the advancement of the industrial revolution, the requirements for pipeline performance have become higher and higher, and cast iron pipes (CIP), steel pipes (SP), polyethylene pipes (such as polyvinyl chloride (PVC), high-density polyethylene (HDPE)), prestressed concrete cylinder pipes (PCCP) and steel-wrapped concrete cylinder pipes (BCCP) have appeared, as well as new pipelines composed of advanced composite materials such as glass fiber reinforced plastics (GRP) and carbon fiber reinforced plastics (CRP).

[0003] The above-mentioned pipelines are widely used and have their own unique advantages in their respective application fields. They are suitable for various application scenarios, but they also have their own shortcomings. For example, cast iron pipes and steel pipes have poor corrosion resistance and often need anti-corrosion treatment. At the same time, they are relatively heavy and have high material costs. Prestressed steel cylinder concrete pipes often experience medium leakage, prestressed steel corrosion and prestress loss due to cracking of the mortar protective layer. The steel bars of steel cylinder concrete pipes wrapped with steel bars will rust under the influence of the environment, which will greatly reduce the performance of the pipe. Although polyethylene pipes are light in weight, they have low compressive strength and require additional high-strength material support. Such materials are prone to deformation at high temperatures. Under the long-term action of ultraviolet rays, the surface of the pipe will age and become brittle, reducing its durability.

[0004] In general, the performance of various existing pipelines is relatively simple. It is difficult to take into account the performance of light weight, corrosion resistance, leakage prevention and high load-bearing capacity at the same time. They have poor durability, certain limitations in application, and are difficult to adapt to various complex usage environments. Utility Model Content

[0005] The purpose of the utility model is to provide a fiber-reinforced ultra-high performance concrete composite sandwich water pipe with a wide range of applications, light weight, corrosion resistance, leakage resistance and high load-bearing capacity, so as to solve the problem that the various types of pipes proposed in the above-mentioned background technology have relatively single performance, poor durability and are difficult to adapt to various complex use environments.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A fiber-reinforced ultra-high performance concrete composite sandwich water pipeline comprises two interconnected pipeline bodies and a joint sealing structure formed at the connection of the two pipeline bodies, wherein the pipeline body comprises an outer pipe layer, an inner pipe layer, a mesh layer and a concrete layer, the outer pipe layer is sleeved on the outer periphery of the inner pipe layer, and a cavity is correspondingly formed between the outer pipe layer and the inner pipe layer, the mesh layer is arranged in the cavity along the length direction of the pipeline body, and the concrete layer is filled in the cavity.

[0008] Preferably, a sandwich layer covered by a concrete layer is provided between the inner tube layer and the grid layer.

[0009] Preferably, the sandwich layer is evenly provided with holes along the length direction of the pipe body and the circumferential direction of the pipe, so that the concrete layers on both sides of the sandwich layer are connected into one.

[0010] Preferably, the mesh layer is a fiber mesh or a steel cage.

[0011] Preferably, the outer layer of the tube is a fiber-wound tube, a fiber mesh, a steel cage or a speed grid mat.

[0012] Preferably, a plurality of anchoring keys embedded in the concrete layer are provided on the inner circumferential surface of the inner layer of the tube facing away from the tube cavity.

[0013] Preferably, the joint sealing structure adopts an overlapping structure, including a socket part and an overlapping part, the socket part is an annular step structure extending from the connection between one pipe body and the other pipe body, the overlapping part is an annular groove structure extending from the end of the other pipe body and overlapping with the socket part, and the end face of the socket part adjacent to the tube cavity extends toward the inner side of the inner layer of the tube at one end of the overlapping part to form a connecting section.

[0014] Preferably, the inner diameter of the overlapping portion is larger than the outer diameter of the insert portion, so that a gap is formed between the overlapping surfaces of the overlapping portion and the insert portion, and the gap is filled with a cement mortar layer.

[0015] Preferably, a plurality of annular sealing grooves are formed on the overlapping surface of the insert portion or the overlapping portion, and sealing rings are embedded in the plurality of sealing grooves, and the outer peripheral surface of the sealing ring abuts against the other corresponding overlapping surface.

[0016] Preferably, a cork board is fixedly provided on the end butt joint surface of one of the pipe bodies, and a gap is provided between the cork board and the end butt joint surface of the other pipe body.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The pipeline body is formed by pipe layers with different properties, and the structures of various parts of the pipeline body are reasonably configured. By optimizing the structure of the pipeline body, its application range is wide, and it has the advantages of light weight, corrosion resistance, leakage prevention and high load-bearing capacity. It can be applied to various complex construction environments and usage scenarios;

[0019] 2. The concrete layer is ultra-high performance concrete or ordinary concrete. Ultra-high performance concrete has high compressive strength, durability and toughness. The ultra-high performance concrete arranged between the outer layer and the inner layer of the pipe is the main pressure-bearing component of the pipe body. Compared with ordinary concrete, it has a higher pressure-bearing capacity and is not prone to cracking or breaking. Holes are evenly opened in the sandwich layer along the length direction and the circumference direction of the pipe body to connect the concrete layers on both sides of the sandwich layer into one. The sandwich layer and the concrete layer jointly bear the pressure of the pipe body, which has high bearing capacity and is lighter in weight;

[0020] 3. The outer layer of the pipe serves as the supporting outer template of the pipeline body, eliminating the need for formwork support for pouring concrete layers. The inner layer of the pipe is a fiber-wound pipe, fiber mesh, steel cage or speed grid pad. The corresponding outer layer of the pipe can be used according to different construction environments and application scenarios. It has a wide range of applications and provides more options for engineering design. The inner layer of the pipe serves as the inner lining layer and inner template of the pipeline body, eliminating the need for formwork support for pouring concrete layers. The inner layer of the pipe is tightly connected to the concrete layer through anchors, so that the inner layer of the pipe and the concrete layer are connected as a whole. The inner layer of the pipe is a speed grid pad, which has good corrosion resistance and good isolation effect. It can isolate the medium transported by the inner layer of the pipe, avoid the contact between the medium and the concrete layer and cause the concrete layer to crack, and prevent the pipeline body from leaking.

[0021] 4. The joint sealing structure adopts an overlapping structure, including a socket part and an overlapping part. The socket part is an annular step structure extended from the connection between one pipe body and the other pipe body, and the overlapping part is an annular groove structure extended from the end of the other pipe body and overlapped with the socket part. A gap is formed between the overlapping surfaces of the overlapping part and the socket part, and the gap is filled with a cement mortar layer or connected with a flange, so that the two pipe bodies are connected as a whole and the connection is more secure; or the gap is sealed with a sealing ring to reduce leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of the pipeline body of the utility model;

[0023] Figure 2 It is a schematic diagram of the local structure of the pipeline body of the utility model;

[0024] Figure 3 It is a cross-sectional view of the joint sealing structure of Example 1 of the utility model;

[0025] Figure 4 For this utility model Figure 3 The enlarged view of point A in the middle;

[0026] Figure 5 It is a cross-sectional view of the joint sealing structure of Example 2 of the utility model;

[0027] Figure 6 For this utility model Figure 5 Enlarged view of point B in the middle.

[0028] The markings in the figure correspond to the following:

[0029] 1-outer layer of the pipe; 2-concrete layer; 3-grid layer; 4-sandwich layer; 5-inner layer of the pipe; 6-anchor key; 7-sealing ring; 8-cement mortar layer; 9-anti-corrosion layer; 10-pipe body; 11-socket part; 12-lap part; 13-cork board. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Example 1

[0032] See also Figure 1-4 A fiber-reinforced ultra-high performance concrete composite sandwich water pipeline comprises two interconnected pipeline bodies 10 and a joint sealing structure formed at the connection of the two pipeline bodies 10. The pipeline body 10 comprises an outer layer 1, an inner layer 5, a mesh layer 3 and a concrete layer 2. The outer layer 1 is sleeved on the outer periphery of the inner layer 5, and a cavity that can be filled is formed between the outer layer 1 and the inner layer 5. Figure 2 The mesh layer 3 is arranged in the cavity along the length direction of the pipe body 10, see Figure 4 The mesh layer 3 is not in contact with the outer layer 1 and the inner layer 5 of the tube, and is separated from the outer layer 1 and the inner layer 5 by a preset distance, and the concrete layer 2 is filled in the cavity. The mesh layer 3 is hollowed out to allow the concrete layer 2 to pass through and connect as a whole, so that the concrete layer 2 is more tightly combined.

[0033] See also Figure 4In this embodiment, the concrete layer 2 is ultra-high performance concrete or ordinary concrete. Ultra-high performance concrete has high compressive strength, durability and toughness. The ultra-high performance concrete arranged between the outer pipe layer 1 and the inner pipe layer 5 is the main pressure-bearing component of the pipeline body 10. Compared with ordinary concrete, it has higher pressure bearing capacity and is not prone to cracking or breaking. It is cast by vertical casting or horizontal centrifugal casting.

[0034] The outer layer 1 of the pipe serves as the supporting outer template and outer layer reinforcement structure of the pipeline body 10, eliminating the need for formwork support for pouring the concrete layer 2. In this embodiment, the outer layer 1 of the pipe is a fiber-wound pipe, a fiber mesh, a steel cage or a speed grid pad. The corresponding outer layer 1 of the pipe can be used according to different construction environments and application scenarios. It has a wide range of applications and provides more choices for engineering design. The fiber-wound pipe, fiber mesh or steel cage uses one or more fiber-reinforced materials such as glass fiber, basalt fiber, aramid or carbon fiber. The outer layer 1 of the pipe is connected with a concrete pad and a wire tie, and is embedded in the concrete layer 2 through the concrete pad and the wire tie.

[0035] See also Figure 2 and Figure 4 , a sandwich layer 4 covered by a concrete layer 2 is arranged between the inner layer 5 of the pipe and the grid layer 3, and holes are evenly opened in the sandwich layer 4 along the length direction of the pipe body 10 and the circumferential direction of the pipe, so that the concrete layers 2 on both sides of the sandwich layer 4 are connected as a whole, and the sandwich layer 4 and the concrete layer 2 jointly bear the pressure of the pipe body 10. In this embodiment, the sandwich layer 4 is a sandwich cotton board, hard foam plastic or balsa wood. The weight of the sandwich cotton board, hard foam plastic or balsa wood is very light. Compared with the use of the concrete layer 2 alone, the combination of the concrete layer 2 and the sandwich layer 4 makes the pipe have a high bearing capacity and a lighter weight, which is convenient for transportation and construction; compared with the use of only the concrete layer 2, it also saves costs.

[0036] The inner layer 5 of the pipe serves as the inner lining layer and inner formwork of the pipeline body 10, eliminating the need for formwork support for pouring the concrete layer 2. The inner circumferential surface of the inner layer 5 of the pipe facing away from the tube cavity is provided with a plurality of anchoring keys 6 embedded in the concrete layer 2. The mesh layer 3 is fixedly connected to the anchoring key by a binding wire structure (not shown in the figure). The binding wire structure has a limiting effect on the mesh layer 3, which is convenient for the mesh layer 3 to maintain a constant distance from the inner layer 5 of the pipe when the concrete layer 2 is poured, and is convenient for pouring construction. At the same time, the inner layer 5 of the pipe is also tightly connected to the concrete layer 2 through the anchoring key, so that the inner layer 5 of the pipe is connected to the concrete layer 2 as a whole, and the connection is more stable. In this embodiment, the inner layer 5 of the pipe is a speed grid pad, which has good corrosion resistance and good isolation effect. It can isolate the medium transported by the inner layer 5 of the pipe, avoid the contact between the medium and the concrete layer 2 and cause the concrete layer 2 to crack, and prevent the pipeline body 10 from leaking.

[0037] Preferably, the mesh layer 3 is a fiber mesh or a steel cage; relative to the outer layer 1 of the tube, the mesh layer 3 serves as an inner layer reinforcement structure, mainly used to improve the compressive strength, durability and toughness of the concrete layer 2, so that the concrete layer 2 is not prone to cracking or breaking.

[0038] See also Figure 3-4 The joint sealing structure adopts an overlapping structure, including a socket part 11 and an overlapping part 12. The socket part 11 is an annular step structure extending from the connection between one pipe body 10 and another pipe body 10, and the overlapping part 12 is an annular groove structure extending from the end of the other pipe body 10 and overlapping with the socket part 11. The end surface of the socket part 11 adjacent to the tube cavity extends toward the inner side of the pipe inner layer 5 at one end of the overlapping part 12 to form a connecting section (not marked in the figure), and the connecting section overlaps the inner side of the pipe inner layer 5. In this embodiment, the connecting section is a speed grid pad, and the connecting section and the pipe inner layer 5 can be connected as a whole by hot melting, so as to prevent leakage of the pipe body 10.

[0039] The inner diameter of the lap joint 12 is larger than the outer diameter of the socket 11, so that a gap is formed between the lap joint 12 and the lap joint surface of the socket 11, and the gap is filled with a cement mortar layer 8, which serves to connect the socket 11 and the lap joint 12, so that the two pipe bodies 10 are connected into a whole. The lap joint surface of the socket 11 and the lap joint 12 is coated with an anti-corrosion layer 9 for waterproofing and anti-corrosion, and the anti-corrosion layer 9 is an epoxy coal tar layer.

[0040] Example 2

[0041] See also Figure 5-6 The structure of the second embodiment is basically the same as that of the first embodiment, except that the gap between the overlapping surface of the overlapping portion 12 and the socket portion 11 is not filled with a cement mortar layer 8, and a plurality of annular sealing grooves are provided on the overlapping surface of the socket portion 11 or the overlapping portion 12. A sealing ring 7 is embedded in each of the plurality of sealing grooves, and the outer peripheral surface of the sealing ring 7 abuts against the corresponding other overlapping surface to seal the gap. In this embodiment, the sealing ring 7 is a rubber ring.

[0042] Preferably, a cork board 13 is fixedly provided on the end butt surface of one of the pipe bodies 10, and there is a gap between the cork board 13 and the end butt surface of the other pipe body 10. The gap can play a certain buffering role, and the cork board 13 is used for waterproofing and corrosion resistance.

[0043] Example 3

[0044] The structure of Example 3 is basically the same as that of Example 1, with the difference being that the gap between the overlapping surfaces of the overlapping portion 12 and the socket portion 11 is not filled with the cement mortar layer 8, a flange is fixedly mounted on the outer peripheral surface of the socket portion 11, and the socket portion 11 is connected to the overlapping inner peripheral surface of the overlapping portion 12 via the flange, so that the two pipe bodies 10 are connected into a whole.

[0045] The inner layer 5 of the pipe of the utility model uses a corrosion-resistant grid pad as the inner lining of the pipe body 10, so that the pipe body 10 will not leak even when the concrete layer 2 is cracked or broken. Therefore, when in use, the degree of cracking of the concrete layer 2 is no longer used as the limit use state, so that the bearing capacity of the pipe body 10 can be better exerted; secondly, the sandwich layer 4 and the concrete layer 2 jointly bear the pressure of the pipe body 10, which has high bearing capacity and lighter weight, and the grid layer 3 as the inner layer reinforcement structure also improves the compressive strength, durability and toughness of the concrete layer 2. Therefore, there is no need to use conventional prestressed reinforcement materials to increase the tensile strength of the concrete layer 2, thereby greatly reducing the requirements for pipeline production equipment, thereby saving the cost of detecting and maintaining reinforcement fractures and prestress loss.

[0046] In summary, the utility model forms a pipeline body 10 by means of pipe layers with different properties, and rationally configures the structures of various parts of the pipeline body 10. By optimizing the structure of the pipeline body 10, the utility model has a wide range of applications, while also having the advantages of light weight, corrosion resistance, leakage prevention, and high load-bearing capacity, and can be applied to various complex construction environments and usage scenarios.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fiber-reinforced ultra-high performance concrete composite sandwich water pipeline, characterized in that: The invention comprises two mutually connected pipe bodies (10) and a joint sealing structure formed at the connection between the two pipe bodies (10); the pipe body (10) comprises a pipe outer layer (1), a pipe inner layer (5), a mesh layer (3) and a concrete layer (2); the pipe outer layer (1) is sleeved on the outer periphery of the pipe inner layer (5) and a cavity is formed between the pipe outer layer (1) and the pipe inner layer (5); the mesh layer (3) is arranged in the cavity along the length direction of the pipe body (10); and the concrete layer (2) is filled in the cavity.

2. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 1, characterized in that: A sandwich layer (4) covered by a concrete layer (2) is arranged between the inner tube layer (5) and the grid layer (3).

3. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 2, characterized in that: The sandwich layer (4) is evenly provided with holes along the length direction of the pipe body (10) and the circumferential direction of the pipe, so that the concrete layers (2) on both sides of the sandwich layer (4) are connected into one.

4. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 1, characterized in that: The mesh layer (3) is a fiber mesh or a steel cage.

5. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 1, characterized in that: The outer layer (1) of the tube is a fiber-wound tube, a fiber mesh, a steel cage or a speed grid pad.

6. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 4, characterized in that: A plurality of anchoring keys (6) embedded in the concrete layer (2) are arranged on the inner peripheral surface of the inner tube layer (5) facing away from the tube cavity.

7. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 1, characterized in that: The joint sealing structure adopts an overlapping structure, comprising a socket part (11) and an overlapping part (12), wherein the socket part (11) is an annular step structure extending from the connection between one pipe body (10) and another pipe body (10), and the overlapping part (12) is an annular groove structure extending from the end of the other pipe body (10) and overlapping the socket part (11), and the end surface of the socket part (11) adjacent to the tube cavity extends toward the inner side of the tube inner layer (5) at one end of the overlapping part (12) to form a connecting section.

8. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 7, characterized in that: The inner diameter of the overlapping portion (12) is greater than the outer diameter of the insert portion (11), so that a gap is formed between the overlapping surfaces of the overlapping portion (12) and the insert portion (11), and the gap is filled with a cement mortar layer (8).

9. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 7, characterized in that: A plurality of annular sealing grooves are provided on the overlapping surface of the insert portion (11) or the overlapping portion (12), and sealing rings (7) are embedded in the plurality of sealing grooves, with the outer peripheral surface of the sealing ring (7) abutting against the other corresponding overlapping surface.

10. The fiber-reinforced ultra-high performance concrete composite sandwich water pipeline according to claim 9, characterized in that: A cork board (13) is fixedly arranged on the end butt joint surface of one of the pipe bodies (10), and a gap is provided between the cork board (13) and the end butt joint surface of the other pipe body (10).

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