Water supply and drainage pressure-bearing combined pipeline

Abstract

The invention provides a water supply and drainage pressure-bearing combined pipeline, and relates to the technical field of water delivery pipelines, an inner pipeline is arranged in a pipeline inner cavity of an outer pipeline, the central axis of the inner pipeline coincides with the central axis of the outer pipeline, and an interlayer filling space is formed between the pipeline outer wall of the inner pipeline and the pipeline inner wall of the outer pipeline; the connecting structure comprises a plurality of first structure connecting pieces and a plurality of second structure connecting pieces, the first structure connecting pieces are arranged on the outer wall of the inner pipeline, the second structure connecting pieces are arranged on the inner wall of the outer pipeline, and the interlayer filling space between the inner pipeline and the outer pipeline is filled with the filling substance. And the inner pipeline and the first structure connecting piece on the inner pipeline are mutually fixed with the outer pipeline and the second structure connecting piece on the outer pipeline through the filling material. The pipe wall thickness of the water supply and drainage pressure-bearing combined pipeline is smaller than that of a pure steel pipeline, the machining difficulty and the machining cost are lower, the inner diameter can exceed 8 m, and the pipe wall thickness of the inner pipeline and the pipe wall thickness of the outer pipeline are controlled to range from 5 mm to 30 mm.

Description

Technical Field

[0001] The present application relates to the technical field of water delivery pipelines, and in particular to a pressure-bearing combined pipeline for water supply and drainage. Background Art

[0002] In some specific application scenarios, high-pressure or large-diameter pipelines are required, whose internal pressure may reach 10Mpa or higher, and the inner diameter may reach 4m or more. In some cases, these pipelines need to bear upper loads, such as buried pipelines need to bear soil or accumulation loads. Therefore, extremely high requirements are placed on the bearing capacity of the pipeline structure.

[0003] The large-diameter pipes commonly used in engineering generally include steel pipes, prestressed concrete cylinder pipes (PCCP) pipes, etc. When pure steel pipes are used, very thick pipe walls are required to meet the bearing capacity requirements. However, thick pipe walls will cause many inconveniences in processing, transportation, and construction due to their own weight and volume. When using PCCP pipes, concrete accounts for a large part of the pipe structure, so this type of pipe has a large deadweight, which makes construction more inconvenient. In addition, there are several engineering cases where PCCP pipes suddenly burst, and the main reason is the corrosion of the prestressed steel wire on the pipe. When the prestressed steel wire corrodes or even breaks, the concrete pipe that loses the prestress will not be able to withstand the tensile stress, resulting in the bursting of the pipe. This type of damage is a sudden brittle failure that is difficult to predict in advance. Summary of the invention

[0004] Based on this, it is necessary to provide a pressure-bearing combined water supply and drainage pipeline to address the above-mentioned technical problems.

[0005] The present application provides a combined pressure-bearing water supply and drainage pipeline, the combined pressure-bearing water supply and drainage pipeline comprising:

[0006] an inner conduit having a first inner diameter and a first outer diameter;

[0007] An outer pipe, the outer pipe having a second inner diameter and a second outer diameter, the first outer diameter of the inner pipe being smaller than the second inner diameter of the outer pipe, the inner pipe being arranged in the inner cavity of the outer pipe, the central axis of the inner pipe coincides with the central axis of the outer pipe, and an interlayer filling space being provided between the outer wall of the inner pipe and the inner wall of the outer pipe;

[0008] A connection structure, the connection structure comprising a plurality of first structure connection members and a plurality of second structure connection members, the plurality of first structure connection members being arranged on the outer wall of the inner pipe, and the plurality of second structure connection members being arranged on the inner wall of the outer pipe;

[0009] A filling material is filled in the interlayer filling space between the inner pipe and the outer pipe, and the inner pipe and the first structural connecting member thereon are fixed to the outer pipe and the second structural connecting member thereon through the filling material.

[0010] In one embodiment, the material of the inner pipe is steel; and / or,

[0011] The material of the outer pipe is steel; and / or,

[0012] The filling material is concrete or mortar.

[0013] In one embodiment, the first inner diameter of the inner pipe is greater than 8 m.

[0014] In one embodiment, the wall thickness of the inner pipe is between 5 mm and 30 mm; and / or,

[0015] The wall thickness of the outer pipe is between 5 mm and 30 mm.

[0016] In one of the embodiments, the radial interlayer thickness of the interlayer filling space is greater than 30 mm.

[0017] In one embodiment, each of the first structural connecting members extends along the axial direction of the inner pipe, and a plurality of the first structural connecting members are distributed along the circumferential direction of the inner pipe; and / or,

[0018] Each of the second structural connecting members extends along the axial direction of the outer pipe, and a plurality of the second structural connecting members are distributed along the circumferential direction of the outer pipe.

[0019] In one embodiment, the first structural connection member is a rectangular element, the long side of the first structural connection member is parallel to the central axis of the inner pipe, the short side of the first structural connection member is perpendicular to the central axis of the inner pipe, and the short side of the first structural connection member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe; and / or,

[0020] The second structural connecting member is a rectangular element, the long side of the second structural connecting member is parallel to the central axis of the outer pipe, the short side of the second structural connecting member is perpendicular to the central axis of the outer pipe, and the short side of the second structural connecting member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe.

[0021] In one embodiment, among the plurality of first structural connectors provided on the inner pipe, a first spacing space is provided between two adjacent first structural connectors along the circumferential direction of the inner pipe, and among the plurality of second structural connectors provided on the outer pipe, a second spacing space is provided between two adjacent second structural connectors along the circumferential direction of the outer pipe;

[0022] The plurality of first structural connecting members arranged on the inner pipe are all radially opposite to the plurality of second spacing spaces on the outer pipe, and the plurality of second structural connecting members arranged on the outer pipe are all radially opposite to the plurality of first spacing spaces on the inner pipe.

[0023] In one embodiment, along the circumferential direction of the inner pipe and the outer pipe, a plurality of the first structural connecting members and a plurality of the second structural connecting members are distributed one by one in sequence.

[0024] In one embodiment, the first structural connection member is welded to the outer wall of the inner pipe; and / or,

[0025] The second structural connecting member is welded to the inner wall of the outer pipe; and / or,

[0026] The first structural connection member is configured as a rib plate having a T-shaped or L-shaped cross-sectional shape in the radial direction, and the radial maximum width of the first structural connection member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe; and / or,

[0027] The second structural connection member is configured as a rib plate having a T-shaped or L-shaped cross-sectional shape in the radial direction, and the radial maximum width of the first structural connection member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe; and / or,

[0028] At least one first through hole is provided on the first structural connecting member; and / or,

[0029] At least one second through hole is formed in the second structural connecting member.

[0030] In the above-mentioned pressure-bearing combined pipe for water supply and drainage, a plurality of first structural connectors and a plurality of second structural connectors may be equivalent to connectors for indirect connection between an inner pipe and an outer pipe, but the above-mentioned structural design is characterized in that the first structural connector is only connected to the inner pipe, and does not form contact or connection with the outer pipe, and the second structural connector is only connected to the outer pipe, and does not form contact or connection with the inner pipe, and the indirect connection function of the plurality of first structural connectors and the plurality of second structural connectors is reflected in the filling of the filling material in the interlayer filling space between the inner pipe and the outer pipe, that is, when the filling material is filled in the interlayer filling space between the inner pipe and the outer pipe and solidified and subjected to stress, the inner pipe and the first structural connector thereon and the outer pipe and the second structural connector thereon will form a synergistic force based on the filling material.

[0031] Based on the above-mentioned coordinated force structural design, the sum of the wall thickness of the inner pipe and the wall thickness of the outer pipe in the water supply and drainage pressure-bearing combined pipeline can be designed to be smaller than the existing pure steel pipeline, wherein the thickness of the filling material between the inner pipe and the outer pipe is not calculated, so that the amount of steel used can be reduced, and the processing difficulty and processing cost are also reduced. After design, the above-mentioned water supply and drainage pressure-bearing combined pipeline can be suitable for large-diameter pipelines, and the inner diameter can exceed 8m. In the structural design of pure steel pipelines, the wall thickness of the inner and outer pipelines can be controlled between 5mm and 30mm, or even between 5mm and 20mm, which is much less than 50mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the coaxial sleeve connection state of an inner pipe and an outer pipe provided in one embodiment of the present application.

[0033] Figure 2 A schematic diagram of the assembly state of an inner pipe and a first structural connecting member provided for one embodiment of the present application.

[0034] Figure 3 A schematic diagram of the assembly state of an outer pipe and a second structural connecting member provided in one embodiment of the present application.

[0035] Figure 4 A schematic diagram of distributing a first structural connector and a second structural connector in an interlayer filling space between an inner pipe and an outer pipe according to an embodiment of the present application.

[0036] Figure 5 A schematic structural diagram of a pressure-bearing combined water supply and drainage pipeline provided in one embodiment of the present application.

[0037] Figure 6 A schematic structural diagram of a first structural connector and a second structural connector provided for another embodiment of the present application.

[0038] Figure 7 A schematic structural diagram of a first structural connecting member and a second structural connecting member provided in yet another embodiment of the present application.

[0039] Figure 8 A schematic structural diagram of a first through hole and a second through hole provided in one embodiment of the present application.

[0040] Fig. 9 A schematic diagram of the distribution state of the first through holes or the second through holes provided in one embodiment of the present application.

[0041] Figure Number:

[0042] 1000, inner pipe; 2000, outer pipe; 3000, interlayer filling space; 4000, filling material; 5000, first structural connecting piece; 6000, second structural connecting piece;

[0043] 5001, first through hole; 6001, second through hole. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0050] In order to ensure the strength of use, the wall thickness of existing steel pipes for water delivery is relatively large, for example, the wall thickness can reach more than 5cm. This method of increasing the thickness to maintain strength is not economically beneficial in an environment of rising steel prices. Therefore, in response to the problem of high steel consumption of steel pipes, this application provides a water supply and drainage pressure-bearing combined pipeline, which proposes a hollow sandwich thin-walled steel tube concrete pipe with lower steel consumption while ensuring strength, replacing the existing steel pipes or steel-reinforced steel cylinder concrete pipes and other pipeline structures with large steel consumption. The water supply and drainage pressure-bearing combined pipeline provided by this application increases the inner diameter to the existing steel pipe application limit of 8m.

[0051] The thickness of a single steel pipe (inner steel pipe or outer steel pipe) can be reduced by at least half of the wall thickness of the steel pipe used in the same situation, thereby greatly improving the convenience of processing and transportation. The processing of the inner steel pipe and the outer steel pipe of the present application is also more convenient in terms of structure. The connecting parts of the steel pipe can be welded before the inner and outer steel pipes are placed concentrically, which effectively avoids the situation of processing in a small space. The sandwich concrete greatly increases the thickness of the overall wall of the pipeline at a low cost, thereby improving the bending bearing capacity of the pipeline, and can reduce the thickness of the steel pipe wall to a certain extent, saving steel and reducing costs. In addition, the pouring of the sandwich concrete can be carried out after transportation to the site, which can also reduce transportation costs.

[0052] See also Figures 1 to 7 As shown, the water supply and drainage pressure-bearing combined pipe provided by the present application includes an inner pipe 1000 and an outer pipe 2000. The inner pipe 1000 has a first inner diameter and a first outer diameter, and the outer pipe 2000 has a second inner diameter and a second outer diameter. The first outer diameter of the inner pipe 1000 is smaller than the second inner diameter of the outer pipe 2000. The inner pipe 1000 is arranged in the inner cavity of the outer pipe 2000, and the central axis of the inner pipe 1000 coincides with the central axis of the outer pipe 2000. There is an interlayer filling space 3000 between the outer wall of the inner pipe 1000 and the inner wall of the outer pipe 2000, see Figure 1 In order to improve the strength of the water supply and drainage pressure-bearing combined pipe, a connection structure may be provided inside the water supply and drainage pressure-bearing combined pipe. The connection structure may include a plurality of first structure connectors 5000 and a plurality of second structure connectors 6000. Figure 2 As shown, a plurality of first structural connecting members 5000 are arranged on the outer wall of the inner pipe 1000, such as Figure 3 As shown, a plurality of second structural connecting members 6000 are arranged on the inner wall of the outer pipe 2000 .

[0053] At this time, if Figure 4As shown, in the state where the interlayer filling space 3000 is empty, the first structural connector 5000 is only connected to the inner pipe 1000, and does not form contact or connection with the outer pipe 2000. Similarly, the second structural connector 6000 is only connected to the outer pipe 2000, and does not form contact or connection with the inner pipe 1000. Figure 5 As shown, when the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000 is as shown in FIG. Figure 4 After a plurality of first structural connectors 5000 and a plurality of second structural connectors 6000 are distributed as shown, the filling material 4000 can be filled in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000. When the filling material 4000 is fully filled in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000 and solidified under stress, the inner pipe 1000 and the first structural connectors 5000 thereon can be fixed to each other with the outer pipe 2000 and the second structural connectors 6000 thereon through the filling material 4000.

[0054] For example, in one embodiment, after the inner pipe 1000 and the outer pipe 2000 are placed concentrically, concrete is poured in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000, and self-compacting concrete without vibration can be used for pouring. Those skilled in the art can select the appropriate concrete type and concrete amount according to actual needs, which is not limited here. Moreover, in one embodiment, the first structural connector 5000 and the second structural connector 6000 can also be made of steel, and the first structural connector 5000 can be connected to the outer wall of the inner pipe 1000 by welding, and the second structural connector 6000 can be connected to the inner wall of the outer pipe 2000 by welding.

[0055] In the above structural design, since the inner pipe 1000 and the outer pipe 2000 can be mutually nested to construct the sandwich filling space 3000 located therebetween, and after the relative position relationship between the inner pipe 1000 and the outer pipe 2000 is determined, that is, after the coaxial positioning of the inner pipe 1000 and the outer pipe 2000 is determined, concrete is poured in the formed sandwich filling space 3000. Therefore, the welding of the first structural connecting member 5000 relative to the outer wall of the inner pipe 1000 and the welding of the second structural connecting member 6000 relative to the inner wall of the outer pipe 2000 are easier to operate.

[0056] Because, if the first structural connector 5000 and the second structural connector 6000 are welded in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000, it is not easy to perform the welding operation in the interlayer filling space 3000 due to the length of the inner pipe 1000 and the outer pipe 2000 and the narrowness of the interlayer filling space 3000. However, if the welding of the first structural connector 5000 and the second structural connector 6000 is completed on the inner pipe 1000 and the outer pipe 2000 respectively before the inner pipe 1000 and the outer pipe 2000 are positioned and fitted with each other, it will be easier, which can effectively reduce the difficulty of operation and improve the operation efficiency. Moreover, it can also be more convenient during transportation.

[0057] In addition, technical personnel in this field can also choose other suitable connection methods such as plug-in, snap-on, threaded connection, etc. according to actual needs to realize the connection between the first structural connector 5000 and the outer wall of the inner pipe 1000, and realize the connection between the second structural connector 6000 and the inner wall of the outer pipe 2000, which is not limited here.

[0058] In such Figure 5 In the above-mentioned water supply and drainage pressure-bearing combined pipe, the plurality of first structural connecting members 5000 and the plurality of second structural connecting members 6000 may be equivalent to the connecting members for indirect connection between the inner pipe 1000 and the outer pipe 2000. However, the above-mentioned structural design is characterized in that the first structural connecting member 5000 is only connected to the inner pipe 1000 and does not form contact or connection with the outer pipe 2000, and the second structural connecting member 6000 is only connected to the outer pipe 2000 and does not form contact or connection with the inner pipe 1000. The plurality of first structural connecting members 500 0 and the indirect connection function of the plurality of second structural connectors 6000 is reflected in the filling of the filling material 4000 in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000, that is, when the filling material 4000 is fully filled in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000 and is cured and stressed, the inner pipe 1000 and the first structural connector 5000 thereon and the outer pipe 2000 and the second structural connector 6000 thereon will form a coordinated force based on the filling material 4000.

[0059] As mentioned above, the material of the inner pipe 1000 is steel, the material of the outer pipe 2000 is steel, and the filling material 4000 can be concrete or mortar. At this time, the inner pipe 1000 and the outer pipe 2000 are both steel pipes, and the first structural connecting members 5000 and the second structural connecting members 6000 cooperate with the filling material 4000 to form a Figure 5The force bearing system shown can realize the coordinated force bearing of the inner pipe 1000 and the outer pipe 2000, and improve the strength of the pipe composed of the inner pipe 1000 and the outer pipe 2000, thereby reducing the wall thickness of the inner pipe 1000 and the outer pipe 2000 accordingly, thereby reducing the amount of steel material used, and using less steel while ensuring the strength.

[0060] In the above technical solution, the inner pipe 1000 and the outer pipe 2000 can be prepared by steel plate winding or the like. Based on the above-mentioned coordinated force-bearing structural design, the sum of the wall thickness of the inner pipe 1000 and the wall thickness of the outer pipe 2000 in the water supply and drainage pressure-bearing combined pipe provided by the present application can be designed to be smaller than the wall thickness of the existing pure steel pipe (the thickness of the filling material between the inner pipe 1000 and the outer pipe 2000 is not included in this case). Therefore, the amount of steel used can be reduced, and thus, the processing difficulty and processing cost are also reduced. After design, the above-mentioned water supply and drainage pressure-bearing combined pipe can be suitable for large-diameter pipes, and the inner diameter can exceed 8m. This requires at least a wall thickness of 50mm or more in the structural design of the pure steel pipe. Based on the above-mentioned structural design, the wall thickness of the inner pipe 1000 and the outer pipe 2000 can be controlled between 5mm and 30mm, or even between 5mm and 20mm, which is much less than 50mm.

[0061] Moreover, a plurality of first structural connectors 5000 are arranged on the outer wall of the inner pipe 1000, and a plurality of second structural connectors 6000 are arranged on the inner wall of the outer pipe 2000. The advantage is that the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000 does not affect the welding of the plurality of first structural connectors 5000 and the plurality of second structural connectors 6000. Therefore, the radial interlayer thickness of the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000 can be designed to be 30 mm to 300 mm, or even larger than 300 mm.

[0062] The plurality of first structural connecting members 5000 and the plurality of second structural connecting members 6000 may be arranged between the inner pipe 1000 and the outer pipe 2000 in various distribution modes. Figure 5As shown, each first structural connecting member 5000 extends along the axial direction of the inner pipe 1000, so the length of the first structural connecting member 5000 can match the length of the inner pipe 1000, and a structural connection is formed in the axial length direction of the entire inner pipe 1000, and a plurality of first structural connecting members 5000 are distributed along the circumferential direction of the inner pipe 1000, and each second structural connecting member 6000 extends along the axial direction of the outer pipe 2000, so the length of the second structural connecting member 6000 can match the length of the outer pipe 2000, and a structural reinforcement is formed in the axial length direction of the entire outer pipe 2000, and a plurality of second structural connecting members 6000 are distributed along the circumferential direction of the outer pipe 2000.

[0063] Among them, when several first structure connecting parts 5000 are distributed along the circumferential direction of the inner pipe 1000, and several second structure connecting parts 6000 are distributed along the circumferential direction of the outer pipe 2000, the several first structure connecting parts 5000 and the several second structure connecting parts 6000 can be evenly distributed in the circumferential direction or unevenly distributed. Technical personnel in this field can implement the arrangement of several first structure connecting parts 5000 and several second structure connecting parts 6000 as required, and no limitation is made here.

[0064] In one embodiment, the first structural connecting member 5000 can be designed as a rectangular element, the long side of the first structural connecting member 5000 is parallel to the central axis of the inner pipe 1000, the short side of the first structural connecting member 5000 is perpendicular to the central axis of the inner pipe 1000, and the short side of the first structural connecting member 5000 is smaller than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000. The second structural connecting member 6000 can be designed as a rectangular element, the long side of the second structural connecting member 6000 is parallel to the central axis of the outer pipe 2000, the short side of the second structural connecting member 6000 is perpendicular to the central axis of the outer pipe 2000, and the short side of the second structural connecting member 6000 is smaller than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000.

[0065] In addition, Figure 6 or Figure 7 As shown, the first structural connector 5000 can also be a T-shaped rib or an L-shaped rib. In this case, the T-shaped rib or the L-shaped rib is also in a long strip shape, and the length direction of the T-shaped rib or the L-shaped rib is parallel to the central axis of the inner pipe 1000. The T-shaped rib or the L-shaped rib also has a radial maximum width perpendicular to the central axis of the inner pipe 1000, and the radial maximum width is less than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000. It should be noted that the T-shape or L-shape of the T-shaped rib or the L-shaped rib also refers to the cross-sectional shape of the T-shaped rib or the L-shaped rib in the radial direction.

[0066] Similarly, continue to refer to Figure 6 or Figure 7 As shown, the second structural connector 6000 may also be a T-shaped rib or an L-shaped rib. In this case, the T-shaped rib or the L-shaped rib is also in a long strip shape, and the length direction of the T-shaped rib or the L-shaped rib is parallel to the central axis of the outer pipe 2000. The T-shaped rib or the L-shaped rib also has a radial maximum width perpendicular to the central axis of the outer pipe 2000, and the radial maximum width is less than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000. It should be noted that the T-shape or L-shape of the T-shaped rib or the L-shaped rib also refers to the cross-sectional shape of the T-shaped rib or the L-shaped rib in the radial direction.

[0067] In the above technical solution, whether the short side of the first structural connector 5000 is smaller than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, or the radial maximum width of the T-shaped rib or the L-shaped rib is smaller than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, Figure 4 and Figure 5 As shown, it is shown that the first structural connecting member 5000 is only connected to the outer wall of the inner pipe 1000. After the inner pipe 1000, the outer pipe 2000 and the filling material 4000 are jointly prepared to form the above-mentioned water supply and drainage pressure-bearing combined pipe, the first structural connecting member 5000 does not form contact or connection with the outer pipe 2000.

[0068] Similarly, whether the short side of the second structural connector 6000 is smaller than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, or the radial maximum width of the T-shaped rib plate or the L-shaped rib plate is smaller than the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, Figure 4 and Figure 5 As shown, it is shown that the second structural connecting member 6000 is only connected to the inner wall of the outer pipe 2000. After the inner pipe 1000, the outer pipe 2000 and the filling material 4000 are jointly prepared to form the above-mentioned water supply and drainage pressure-bearing combined pipe, the second structural connecting member 6000 does not form contact or connection with the inner pipe 1000.

[0069] From this we can see that Figure 4 and Figure 5 As shown, in the above-mentioned water supply and drainage pressure-bearing composite pipe prepared by the inner pipe 1000, the outer pipe 2000 and the filling material 4000, the first structural connecting part 5000 is only connected to the outer wall of the inner pipe 1000, forming a single-end (or single-side) welded preparation structure, and similarly, the second structural connecting part 6000 is only connected to the inner wall of the outer pipe 2000, also forming a single-end (or single-side) welded preparation structure.

[0070] Due to the length of the inner pipe 1000 and the outer pipe 2000, and the narrowness of the interlayer filling space 3000, if double-end (or double-sided) welding of the first structural connector 5000 and the second structural connector 6000 is performed, that is, one end (or one side) of the first structural connector 5000 and the second structural connector 6000 is welded to the inner pipe 1000, and the other end (or the other side) of the first structural connector 5000 and the second structural connector 6000 is welded to the inner pipe 1000, this double-end (or double-sided) welding method is very difficult and extremely difficult to operate.

[0071] However, in this case, through the above-mentioned structure design of coordinated force, when the filling material 4000 is filled in the interlayer filling space 3000 between the inner pipe 1000 and the outer pipe 2000 and solidified, the inner pipe 1000 and the first structural connector 5000 thereon will form an indirect connection relationship with the outer pipe 2000 through the filling material 4000, rather than forming a direct connection relationship by welding the first structural connector 5000 and the outer pipe 2000. Similarly, the outer pipe 2000 and the second structural connector 6000 thereon will form an indirect connection relationship with the inner pipe 1000 through the filling material 4000, rather than forming a direct connection relationship by welding the second structural connector 6000 and the inner pipe 1000. In this way, the inner pipe 1000 and the first structural connector 5000 thereon and the outer pipe 2000 and the second structural connector 6000 thereon can form a coordinated force based on the filling material 4000. This design reduces the difficulty of welding the first structural connector 5000 and the second structural connector 6000 by double-end (or double-side) welding. While reducing the difficulty of welding, the above-mentioned coordinated force-bearing structural design improves and compensates for the lack of strength of single-end (or single-side) welding, which is another technical concept that reduces the difficulty of operation while ensuring strength.

[0072] The improvement and compensation of strength by the above-mentioned coordinated force-bearing structural design can be proved by the following data.

[0073] Of course, those skilled in the art may also design that: the short side of the first structural connector 5000 is equal to the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, and the radial maximum width of the T-shaped rib or L-shaped rib is equal to the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000. Alternatively, the short side of the second structural connector 6000 is equal to the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, and the radial maximum width of the T-shaped rib or L-shaped rib is equal to the radial interlayer thickness between the inner pipe 1000 and the outer pipe 2000, which is not limited here. Moreover, if Figure 8As shown, at least one first through hole 5001 may be provided on the first structural connection member 5000, and at least one second through hole 6001 may be provided on the second structural connection member 6000. The first through hole 5001 and the second through hole 6001 may enhance the connection between the filling material 4000 and the first structural connection member 5000 or the second structural connection member 6000, as well as the integrity of the entire water supply and drainage pressure-bearing combined pipeline, and enhance the overall coordinated force performance.

[0074] The first structural connecting member 5000 may be provided with a plurality of first through holes 5001, and the second structural connecting member 6000 may also be provided with a plurality of second through holes 6001. When the number of the first through holes 5001 and the second through holes 6001 is a plurality, refer to Fig. 9 As shown, the design principle shows the distribution of the first through holes 5001 and the second through holes 6001. For example, Fig. 9 The left-right direction (i.e., the length direction) is the length direction of the water supply and drainage pressure-bearing combined pipe. When a plurality of first through holes 5001 and a plurality of second through holes 6001 are opened, they can be distributed along the length direction of the water supply and drainage pressure-bearing combined pipe at a fixed interval, and the plurality of first through holes 5001 and the plurality of second through holes 6001 all penetrate the thickness direction of the first structural connector 5000 or the second structural connector 6000.

[0075] Continue reading Figure 1 As shown, in one embodiment, among the several first structural connectors 5000 provided in the inner pipe 1000, it can be defined that there is a first spacing space between two adjacent first structural connectors 5000 along the circumferential direction of the inner pipe 1000, and the first spacing space can be used as a reference for matching with the second structural connector 6000, so that the several second structural connectors 6000 provided in the outer pipe 2000 are radially opposite to the several first spacing spaces on the inner pipe 1000, and the relative relationship can be one second structural connector 6000 corresponding to one first spacing space, or multiple second structural connectors 6000 corresponding to one first spacing space, which is not limited here.

[0076] Similarly, among the plurality of second structural connectors 6000 provided on the outer pipe 2000, it can be defined that there is a second spacing space between two second structural connectors 6000 adjacent to each other along the circumferential direction of the outer pipe 2000, and the second spacing space can be used as a reference for matching with the first structural connector 5000, so that the plurality of first structural connectors 5000 provided on the inner pipe 1000 are radially opposite to the plurality of second spacing spaces on the outer pipe 2000, and the relative relationship can be one first structural connector 5000 corresponding to one second spacing space, or multiple first structural connectors 5000 corresponding to one second spacing space, which is not limited here. In one embodiment, as Figure 5 As shown, it can be defined that along the circumferential direction of the inner pipe 1000 and the outer pipe 2000, a plurality of first structural connecting members 5000 and a plurality of second structural connecting members 6000 are distributed one by one in sequence.

[0077] When the above-mentioned water supply and drainage pressure-bearing combined pipeline is in an application scenario (area) such as near a railway, the soil in the application scenario (area) may have relative displacement, which may cause the above-mentioned water supply and drainage pressure-bearing combined pipeline to deform with the relative displacement of the soil, and at the same time, the above-mentioned water supply and drainage pressure-bearing combined pipeline may need to bear additional tensile and compressive strains or bending moments, etc. The advantage of this structure in this special case is that the filling material 4000 increases the height of the cross-section of the entire water supply and drainage pressure-bearing combined pipeline, thereby increasing the cross-sectional inertia moment of the water supply and drainage pressure-bearing combined pipeline, and thus improving the overall bending resistance.

[0078] For example, PCCP (Prestressed Concrete Cylinder Pipe, a water pipe made by winding circumferential prestressed steel wire on a high-strength concrete pipe core with a steel cylinder and spraying a dense cement mortar protective layer on it), because the prestressed steel wire is prone to stress corrosion, and the above-mentioned water supply and drainage pressure-bearing combined pipeline is a hidden project, it is difficult to find problems with the above-mentioned water supply and drainage pressure-bearing combined pipeline, especially for pressure pipelines, this situation will be more dangerous. For PCCP, a commonly used type of pipeline, once the prestressed steel wire has problems and breaks, the accident will be very serious and the pipeline will burst.

[0079] The above-mentioned water supply and drainage pressure-bearing combined pipe provided in this application and the existing prestressed steel cylinder concrete pipe are both rigid pipes. Therefore, they can be calculated according to the following formula:

[0080]

[0081] Among them, E p is the elastic modulus of the pipe, E d is the deformation comprehensive modulus of the soil on the pipe side, t is the pipe wall thickness, and r0 is the calculation radius. s When ≥1, it is calculated as a rigid pipe; otherwise, it is calculated as a flexible pipe.

[0082]

[0083]

[0084] When E dWhen ≤21.016, the pipeline is calculated as a rigid pipe. Generally, when the soil is not too dense, its deformation modulus will not be greater than 20. Therefore, in most cases, it can be calculated as a rigid pipeline to conduct risk analysis and pre-risk avoidance.

[0085] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A pressure-bearing combined pipeline for water supply and drainage, characterized in that: The water supply and drainage pressure-bearing combined pipeline comprises: an inner conduit having a first inner diameter and a first outer diameter; An outer pipe, the outer pipe having a second inner diameter and a second outer diameter, the first outer diameter of the inner pipe being smaller than the second inner diameter of the outer pipe, the inner pipe being arranged in the inner cavity of the outer pipe, the central axis of the inner pipe coincides with the central axis of the outer pipe, and an interlayer filling space being provided between the outer wall of the inner pipe and the inner wall of the outer pipe; A connection structure, the connection structure comprising a plurality of first structure connection members and a plurality of second structure connection members, the plurality of first structure connection members being arranged on the outer wall of the inner pipe, and the plurality of second structure connection members being arranged on the inner wall of the outer pipe; A filling material is filled in the interlayer filling space between the inner pipe and the outer pipe, and the inner pipe and the first structural connecting member thereon are fixed to the outer pipe and the second structural connecting member thereon through the filling material.

2. The water supply and drainage pressure-bearing combined pipeline according to claim 1, characterized in that: The material of the inner pipe is steel; and / or, The material of the outer pipe is steel; and / or, The filling material is concrete or mortar.

3. The water supply and drainage pressure-bearing combined pipeline according to claim 1, characterized in that: The first inner diameter of the inner pipe is greater than 8 m.

4. The water supply and drainage pressure-bearing combined pipeline according to claim 1, characterized in that: The wall thickness of the inner pipe is between 5 mm and 30 mm; and / or, The wall thickness of the outer pipe is between 5 mm and 30 mm.

5. The water supply and drainage pressure-bearing combined pipeline according to claim 1, characterized in that: The radial interlayer thickness of the interlayer filling space is greater than 30 mm.

6. The water supply and drainage pressure-bearing combined pipeline according to claim 1, characterized in that: Each of the first structural connecting members extends along the axial direction of the inner pipe, and a plurality of the first structural connecting members are distributed along the circumferential direction of the inner pipe; and / or, Each of the second structural connecting members extends along the axial direction of the outer pipe, and a plurality of the second structural connecting members are distributed along the circumferential direction of the outer pipe.

7. The pressure-bearing combined water supply and drainage pipeline according to claim 6, characterized in that: The first structural connection member is a rectangular element, the long side of the first structural connection member is parallel to the central axis of the inner pipe, the short side of the first structural connection member is perpendicular to the central axis of the inner pipe, and the short side of the first structural connection member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe; and / or, The second structural connecting member is a rectangular element, the long side of the second structural connecting member is parallel to the central axis of the outer pipe, the short side of the second structural connecting member is perpendicular to the central axis of the outer pipe, and the short side of the second structural connecting member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe.

8. The pressure-bearing combined water supply and drainage pipeline according to claim 6, characterized in that: Among the plurality of first structural connectors provided on the inner pipe, a first spacing space is provided between two adjacent first structural connectors along the circumferential direction of the inner pipe, and among the plurality of second structural connectors provided on the outer pipe, a second spacing space is provided between two adjacent second structural connectors along the circumferential direction of the outer pipe; The plurality of first structural connecting members arranged on the inner pipe are all radially opposite to the plurality of second spacing spaces on the outer pipe, and the plurality of second structural connecting members arranged on the outer pipe are all radially opposite to the plurality of first spacing spaces on the inner pipe.

9. The pressure-bearing combined water supply and drainage pipeline according to claim 8, characterized in that: Along the circumferential direction of the inner pipe and the outer pipe, a plurality of the first structural connecting members and a plurality of the second structural connecting members are distributed one by one in sequence and at intervals.

10. The pressure-bearing combined water supply and drainage pipeline according to claim 1, characterized in that: The first structural connecting member is welded to the outer wall of the inner pipe; and / or, The second structural connecting member is welded to the inner wall of the outer pipe; and / or, The first structural connection member is configured as a rib plate having a T-shaped or L-shaped cross-sectional shape in the radial direction, and the radial maximum width of the first structural connection member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe; and / or, The second structural connection member is configured as a rib plate having a T-shaped or L-shaped cross-sectional shape in the radial direction, and the radial maximum width of the first structural connection member is smaller than the radial interlayer thickness between the inner pipe and the outer pipe; and / or, At least one first through hole is provided on the first structural connecting member; and / or, At least one second through hole is formed in the second structural connecting member.

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