Pressure water pipe

Abstract

The invention discloses a pressure water pipe, and relates to the technical field of pressure pipelines, the pressure water pipe comprises a pipe section unit, the pipe section unit comprises a steel lining, the outer side of the steel lining is sleeved with a steel outer lining, an annular reinforcement cage is arranged between the steel lining and the steel outer lining, and the annular reinforcement cage is filled with solid waste utilization concrete; the annular connecting plates are located between every two adjacent pipe section units, and the multiple pipe section units can be sequentially, fixedly and hermetically connected in the axial direction. According to the pressure water pipe, by means of effective combination of the steel plate and the concrete, the radial rigidity of the pressure pipe is remarkably improved, the steel inner lining and the steel outer lining bear the pulling force of the water pipe at the same time, the series of problems that super-thick steel plates are difficult to machine and manufacture, large in welding difficulty and the like can be directly and effectively solved, and super-thick and super-strong steel plate linings do not need to be adopted; processing and manufacturing are simple, and cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of pressure pipes, in particular to a pressure water pipe. Background Art

[0002] Penstocks are an important part of the water diversion system of pumped storage power stations. They are directly related to the safety and economy of the project and are an important object of engineering design and research. At present, penstocks at home and abroad usually have two forms: "steel plate lining" and "reinforced concrete lining". For pumped storage high-pressure water pipes, due to the high requirements for bearing capacity and crack resistance, reinforced concrete lining penstocks are often difficult to meet the requirements, so steel plate lining penstocks are mostly used. The unit cost of the steel plate used in the steel plate lining penstock is as high as 10,000-20,000 yuan / ton (1-2 times that of ordinary steel plates), resulting in the current cost of steel plate lining penstocks being too high. In addition, the processing and manufacturing of ultra-thick and ultra-strong steel plate lining penstocks is difficult, and ultra-thick and ultra-strong steel plate lining penstocks have become one of the key problems in the construction and cost control of pumped storage power stations.

[0003] Therefore, it is urgent to design a pressure water pipe that meets the requirements of bearing capacity and crack resistance, is simple to process and manufacture, and has low cost. Summary of the invention

[0004] The purpose of the present invention is to provide a pressure water pipe to solve the problems existing in the above-mentioned prior art. By utilizing the effective combination of steel plates and concrete, the radial stiffness of the pressure pipe can be significantly improved. The steel inner lining and the steel outer lining can simultaneously withstand the tension of the water pipe, which can directly and effectively solve a series of difficult problems such as the difficulty in processing and manufacturing ultra-thick steel plates and the difficulty in welding. There is no need to use ultra-thick and ultra-strong steel plate linings, and the processing and manufacturing are simple and the cost is low.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a pressure water pipe, comprising:

[0007] A pipe section unit, wherein the pipe section unit comprises a steel inner liner, a steel outer liner is sleeved outside the steel inner liner, a circumferential steel cage is arranged between the steel inner liner and the steel outer liner, and the circumferential steel cage is filled with solid waste utilization concrete;

[0008] The annular connecting plate is located between two adjacent pipe section units, and can sequentially and seal and fix the plurality of pipe section units in the axial direction. The steel inner lining and the steel outer lining of the present invention can simultaneously withstand the pulling force of the water pipe, and can directly and effectively solve a series of problems such as the difficulty in processing and manufacturing ultra-thick steel plates and the difficulty in welding. By increasing the steel reinforcement ratio in concrete, the proportion of steel bars in concrete bearing the pulling force can be increased, and the bearing capacity requirements of the steel plates can be further reduced, thereby reducing the strength grade requirements of the steel plates, and effectively reducing the unit price of the steel plates and the processing and welding costs associated with the ultra-high strength steel plates.

[0009] Optionally, the steel lining and the steel outer lining are both cylindrical structures made of steel plates or stainless steel plates, and the thickness of the steel lining and the steel outer lining does not exceed 20 mm.

[0010] Optionally, bolt connectors are connected between the steel lining and the steel outer lining, or the outer surface of the steel lining and the inner surface of the steel outer lining are both provided with bolt connectors; the bolt connectors are arranged in a rectangular shape or a plum blossom shape, and are used to connect the steel lining, the steel outer lining and the solid waste utilization concrete.

[0011] Optionally, the solid waste utilization concrete uses recycled concrete, coal gangue concrete or steel slag concrete, and the filling thickness of the solid waste utilization concrete is not less than 200 mm.

[0012] Optionally, the annular steel bar cage includes a plurality of annular steel bars arranged axially along the pipe section unit, a plurality of longitudinal steel bars are symmetrically provided on both sides of the annular steel bars, and the longitudinal steel bars and the annular steel bars are fixed by binding with tension bars.

[0013] Optionally, the annular steel bars are stress-bearing steel bars, and a plurality of rows of annular steel bar groups are evenly arranged in sequence along the axial direction of the pipe section unit, and each row of the annular steel bar group includes two annular steel bars of equal height and coaxial arrangement.

[0014] Optionally, the longitudinal steel bars are arranged along the entire length of the pipe section unit in the axial direction, and a plurality of the longitudinal steel bars are evenly arranged along both inner and outer sides of the annular steel bars.

[0015] Optionally, the tie bars are arranged in a rectangular structure or a plum blossom-shaped structure.

[0016] Optionally, the thickness of the annular connecting plate is greater than the distance between the inner wall of the steel lining and the outer wall of the steel outer lining; the annular connecting plate is prefabricated in pieces along the annular direction of the pipe segment unit, and its top and bottom ends are respectively connected to adjacent pipe segment units by groove welding.

[0017] Optionally, the annular connecting plate includes a first annular plate and a second annular plate arranged coaxially, wherein both ends of the first annular plate are fixedly welded to the steel inner lining of the adjacent pipe section unit, and both ends of the second annular plate are fixedly welded to the steel outer lining of the adjacent pipe section unit.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The pressure water pipe provided by the present invention has a simple structure. The steel inner lining and the steel outer lining are prefabricated in the factory. After the annular steel cage is placed, the solid waste concrete is poured. The pipe is transported to the site and the annular connecting plate is welded to complete the axial connection. The steel inner lining and the steel outer lining can bear the tension of the water pipe at the same time, and the ultra-thick steel plate can be turned into a medium-thick or even thin steel plate. It can directly and effectively solve a series of problems such as the difficulty in processing and manufacturing ultra-thick steel plates and the difficulty in welding, and has a very prominent and important significance.

[0020] By effectively combining steel plates and concrete, the radial stiffness of the pressure pipe is significantly improved, avoiding deformation of the pressure pipe during transportation and construction and radial deformation caused by internal and external water pressure during use. The stud connectors enhance the combined effect between the steel lining and the steel outer lining and the solid waste utilization concrete.

[0021] Increasing the reinforcement ratio of steel bars can increase the proportion of steel bars bearing tensile force, reduce the bearing capacity requirements of steel plates, and thus reduce the strength grade requirements of steel plates, effectively reducing the unit price of steel plates and the processing and welding costs of high-strength steel plates. Using recycled concrete, coal gangue concrete or steel slag concrete to promote the engineering application of solid waste concrete has important social significance and significant economic benefits.

[0022] In general, the present invention utilizes an effective combination of steel plates and concrete to significantly improve the radial stiffness of the pressure pipe. The steel lining, steel outer lining and annular steel cage simultaneously bear the tension of the water pipe, effectively solving a series of problems such as the difficulty in processing ultra-thick steel plates and the difficulty in welding high-strength steel plates. Recycled concrete, coal gangue concrete or steel slag concrete is used between the steel lining and the steel outer lining to promote the engineering application of solid waste utilization concrete, which has important social significance and significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the pressure water pipe of the present invention;

[0025] Figure 2It is a cross-sectional schematic diagram of a pressure water pipe of the present invention;

[0026] Figure 3 It is an overall schematic diagram of the annular reinforcement cage in the present invention;

[0027] Figure 4 It is a cross-sectional schematic diagram of the annular reinforcement cage in the present invention;

[0028] Figure 5 It is an overall schematic diagram of the axial connection of adjacent pipe section units in the present invention.

[0029] Icons: 1- steel lining; 2- steel outer lining; 3- circumferential steel cage; 4- solid waste utilization concrete; 5- circumferential steel bars; 6- longitudinal steel bars; 7- tension bars; 8- bolt connector; 9- circumferential connecting plate. DETAILED DESCRIPTION

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

[0031] The purpose of the present invention is to provide a pressure water pipe to solve the problems existing in the above-mentioned prior art. By utilizing the effective combination of steel plates and concrete, the radial stiffness of the pressure pipe can be significantly improved. The steel inner lining and the steel outer lining can simultaneously withstand the tension of the water pipe, which can directly and effectively solve a series of difficult problems such as the difficulty in processing and manufacturing ultra-thick steel plates and the difficulty in welding. There is no need to use ultra-thick and ultra-strong steel plate linings, and the processing and manufacturing are simple and the cost is low.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] refer to Figure 1 to Figure 5 As shown, the present invention provides a pressure water pipe, including a pipe body that is fixedly and sealedly connected in sequence along the axial direction using a plurality of prefabricated pipe section units. The pipe section unit in this embodiment includes a steel inner liner 1, a steel outer liner 2, solid waste utilization concrete 4 and an annular steel cage 3. The steel inner liner 1 is sleeved with a steel outer liner 2 on the outside, and the two are coaxially arranged. An annular steel cage 3 is provided between the steel inner liner 1 and the steel outer liner 2, and the annular steel cage 3 is filled with solid waste utilization concrete 4;

[0034] In order to seal and fix two adjacent pipe segment units, an annular connecting plate 9 is designed in this embodiment. The annular connecting plate 9 is located between two adjacent pipe segment units and can fix and seal weld multiple pipe segment units in sequence along the axial direction.

[0035] Further, in a preferred embodiment, the steel lining 1 and the steel outer lining 2 are both cylindrical structures made of steel plates or stainless steel plates, and the thickness of the steel lining 1 and the steel outer lining 2 does not exceed 20 mm. In a specific embodiment, a bolt connector 8 is connected between the steel lining 1 and the steel outer lining 2 to connect and fix the steel lining 1 and the steel outer lining 2. In another embodiment, the bolt connector 8 is arranged on the outer surface of the steel lining 1 and the inner surface of the steel outer lining 2, and the steel lining 1 and the steel outer lining 2 are not directly connected. The bolt connector 8 is arranged in a rectangular or plum blossom shape, and is used to connect the steel lining 1, the steel outer lining 2 and the solid waste utilization concrete 4 after pouring the solid waste utilization concrete 4. The solid waste utilization concrete 4 in this embodiment adopts recycled concrete, coal gangue concrete or steel slag concrete, and the filling thickness of the solid waste utilization concrete 4 is not less than 200 mm.

[0036] In a specific embodiment, the annular steel bar cage 3 includes a plurality of annular steel bars arranged axially along the pipe section unit, the annular steel bars are stress-bearing steel bars, and a plurality of rows of annular steel bar groups are evenly arranged in sequence along the axial direction of the pipe section unit, and each row of annular steel bar groups includes two annular steel bars 5 of equal height and coaxial arrangement; a plurality of longitudinal steel bars 6 are symmetrically arranged on both sides of the annular steel bars 5, the longitudinal steel bars 6 are arranged along the axial direction of the pipe section unit, and a plurality of longitudinal steel bars 6 are evenly arranged along the inner and outer sides of the annular steel bars 5; the longitudinal steel bars 6 and the annular steel bars 5 are fixed by binding with tie bars 7 of a rectangular arrangement structure or a plum blossom arrangement structure.

[0037] Preferably, the thickness of the annular connecting plate 9 of this embodiment is greater than the distance between the inner wall of the steel lining 1 and the outer wall of the steel outer lining 2; the annular connecting plate 9 is prefabricated in pieces along the annular direction of the pipe section unit, and its top and bottom ends are respectively connected to the adjacent pipe section units by groove welding. In another embodiment, the annular connecting plate 9 can also be divided into a first annular plate and a second annular plate arranged coaxially, and the two ends of the first annular plate are fixedly welded to the steel lining 1 of the adjacent pipe section unit, and the two ends of the second annular plate are fixedly welded to the steel outer lining 2 of the adjacent pipe section unit, which can also achieve a fixed and sealed connection of the adjacent pipe section units.

[0038] The present invention adopts a steel plate and concrete composite structure, and utilizes the effective combination of steel plate and concrete to significantly improve the radial stiffness of the pressure pipe. The steel lining 1 and the steel outer lining 2 simultaneously bear the tension of the water pipe, which can directly and effectively solve a series of problems such as the difficulty in processing and manufacturing ultra-thick steel plates and the difficulty in welding. By increasing the steel reinforcement ratio in the concrete through the annular steel cage 3, the proportion of steel bars in the concrete that bear the tension can be increased, which can further reduce the bearing capacity requirements of the steel plate, thereby reducing the strength grade requirements of the steel plate, and effectively reducing the unit price of the steel plate and the processing and welding costs associated with the ultra-high strength steel plate. Recycled concrete, coal gangue concrete or steel slag concrete is used between the steel lining 1 and the steel outer lining 2 to promote the engineering application of solid waste utilization concrete 4, which has important social significance and significant economic benefits.

[0039] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A pressure water pipe, characterized in that: include: A pipe section unit, wherein the pipe section unit comprises a steel inner liner, a steel outer liner is sleeved outside the steel inner liner, a circumferential steel cage is arranged between the steel inner liner and the steel outer liner, and the circumferential steel cage is filled with solid waste utilization concrete; The annular connecting plate is located between two adjacent pipe segment units and can fix and seal the plurality of pipe segment units in sequence along the axial direction.

2. The pressure water pipe according to claim 1, characterized in that: The steel inner lining and the steel outer lining are both cylindrical structures made of steel plates or stainless steel plates, and the thickness of the steel inner lining and the steel outer lining does not exceed 20 mm.

3. The pressure water pipe according to claim 1, characterized in that: The steel lining and the steel outer lining are connected with bolt connectors, or the outer surface of the steel lining and the inner surface of the steel outer lining are both provided with bolt connectors; the bolt connectors are arranged in a rectangular shape or a plum blossom shape, and are used to connect the steel lining, the steel outer lining and the solid waste utilization concrete.

4. The pressure water pipe according to claim 1, characterized in that: The solid waste utilization concrete adopts recycled concrete, coal gangue concrete or steel slag concrete, and the filling thickness of the solid waste utilization concrete is not less than 200mm.

5. The pressure water pipe according to claim 1, characterized in that: The annular steel bar cage comprises a plurality of annular steel bars arranged axially along the pipe section unit, a plurality of longitudinal steel bars are symmetrically arranged on both sides of the annular steel bars, and the longitudinal steel bars and the annular steel bars are fixed by binding with tension bars.

6. The pressure water pipe according to claim 5, characterized in that: The annular steel bars are stress-bearing steel bars, and a plurality of rows of annular steel bar groups are evenly arranged in sequence along the axial direction of the pipe section unit, and each row of the annular steel bar group includes two annular steel bars of equal height and coaxial arrangement.

7. The pressure water pipe according to claim 5, characterized in that: The longitudinal steel bars are arranged along the axial direction of the pipe section unit, and a plurality of longitudinal steel bars are evenly arranged along both sides of the inner and outer sides of the annular steel bars.

8. The pressure water pipe according to claim 5, characterized in that: The tie bars are arranged in a rectangular structure or a plum blossom shape.

9. The pressure water pipe according to claim 1, characterized in that: The thickness of the annular connecting plate is greater than the distance between the inner wall of the steel lining and the outer wall of the steel outer lining; the annular connecting plate is prefabricated in pieces along the annular direction of the pipe segment unit, and its top and bottom ends are respectively connected to the adjacent pipe segment units by groove welding.

10. The pressure water pipe according to claim 1, characterized in that: The annular connecting plate comprises a first annular plate and a second annular plate arranged coaxially, wherein both ends of the first annular plate are fixedly welded to the steel inner lining of the adjacent pipe section unit, and both ends of the second annular plate are fixedly welded to the steel outer lining of the adjacent pipe section unit.

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