A riser based on in-situ leaching of uranium and its design method

Abstract

The present invention relates to the technical field of in-situ uranium leaching, and relates to a riser based on in-situ uranium leaching and a design method thereof, wherein the riser comprises an inner core layer, a reinforcement layer, an outer protective layer and a cable group; the reinforcement layer is sleeved on the outside of the inner core layer; the outer protective layer is sleeved on the outside of the reinforcement layer, and the cross-section of the outer protective layer is elliptical; the cable group is arranged between the outer protective layer and the reinforcement layer, and the cable group is arranged along the height direction of the outer protective layer, and the cable group is wavy. By bending the cable group in a wavy shape and arranging it along the height direction of the outer protective layer, the present invention not only simplifies the cable structure, but also has smaller inductance than the spiral arrangement in the prior art, thereby making the transmission efficiency of electricity higher, improving the economic benefits, and also improving the stability and service life of the submersible pump.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ leaching of uranium, and in particular to a riser based on in-situ leaching of uranium and a design method thereof. Background Art

[0002] Currently, my country uses HDPE pipes as risers, with submersible pumps connected at the bottom and cables bundled around the outside of the pipes. This requires dedicated personnel to bundle the cables when lowering the pipes, and to cut the ropes or straps when lifting the pumps, resulting in slow and inefficient operation. Integrating the cables into the riser would not only reduce labor requirements but also significantly increase operation speed and efficiency. Existing techniques typically involve spirally winding the riser pipes around the outer surface of a tensile layer and the inner surface of a protective layer. However, this approach not only complicates the cable laying structure but also reduces the efficiency of power transmission. Summary of the Invention

[0003] The present invention aims to provide a riser for in-situ leaching uranium and a design method thereof to improve the above-mentioned problems. To achieve the above-mentioned objectives, the present invention adopts the following technical solutions:

[0004] On the one hand, the present application provides a riser based on in-situ leaching of uranium, the riser comprising an inner core layer, a reinforcement layer, an outer protective layer and a cable group; the reinforcement layer is sleeved on the outside of the inner core layer; the outer protective layer is sleeved on the outside of the reinforcement layer, and the cross-section of the outer protective layer is elliptical; the cable group is arranged between the outer protective layer and the reinforcement layer, the cable group is arranged along the height direction of the outer protective layer, and the cable group is wavy.

[0005] Optionally, the cable group includes a first cable group and a second cable group, and the first cable group and the second cable group are centrally symmetrically arranged along the central axis of the inner core layer.

[0006] Optionally, the first cable group includes a first cable line and a second cable line, and the second cable group includes a third cable line and a communication line.

[0007] Optionally, the first cable line, the second cable line and the third cable line constitute a three-phase line.

[0008] Optionally, the relative arc length ratio of the cable group is 1.5-2.0 times the axial stretching ratio of the lifting tube.

[0009] Optionally, the first cable includes a conductive core wire and an insulating layer, the conductive core wire is made of thin metal wire, and the insulating layer is made of rubber material.

[0010] Optionally, the thickness of the outer protective layer is 2-5 mm.

[0011] In another aspect, the present application provides a method for designing a riser for in-situ leaching of uranium, the method comprising:

[0012] obtaining first information, the first information comprising an axial stretch rate in the riser;

[0013] determining second information based on the first information, the second information including relative arc length ratios of the cable lines and the communication lines in the cable group, the cable lines and the communication lines in the cable group being formed by connecting a plurality of unit arcs;

[0014] Determine a calculation formula for arc parameters based on geometric principles, wherein the arc parameters include angle information, radius information, and arc length information corresponding to unit arcs of the cables and communication lines in the cable group;

[0015] The arc parameters of the riser are determined according to the arc parameter calculation formula and the relative arc length ratio.

[0016] Optionally, a calculation formula for arc parameters is determined based on geometric principles, including:

[0017] According to the definition of relative arc length ratio, a calculation formula for the unit arc length of the cable and communication line in the riser is obtained to obtain first formula information;

[0018] According to the principle of geometry, the calculation formula of the unit arc length of the cable and communication line in the riser and the calculation formula of the unit chord length of the riser are obtained to obtain the second formula information;

[0019] A calculation formula corresponding to the angle information included in the arc parameters is determined according to the first formula information and the second formula information.

[0020] Optionally, determining the arc parameters of the riser according to the arc parameter calculation formula and the relative arc length ratio includes:

[0021] Get the preset arc height information;

[0022] Calculation is performed based on the angle information and the preset arc height information to obtain third information, where the third information includes radius information corresponding to the unit arc.

[0023] The beneficial effects of the present invention are:

[0024] The present invention bends the cable group into a wave shape and arranges it along the height direction of the outer protective layer. Not only does this simplify the cable structure, but the inductance is also smaller than that of the spiral arrangement in the prior art, making the power transmission more efficient, improving economic benefits, and also improving the stability and service life of the submersible pump. In addition, the present invention combines the softness and plasticity of the cable rubber insulation layer to make the conductive core of the lifting tube soft and movable during the working stretching process, effectively solving the cable's anti-stretching problem and protecting the cable from damage.

[0025] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the embodiments of the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the structure of the riser for in situ leaching of uranium according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of cable group distribution.

[0029] Figure 3 Schematic diagram of cable group stretching.

[0030] Markings in the figure: 1, inner core layer; 2, reinforcement layer; 3, outer protective layer; 4, first cable line; 5, second cable line; 6, communication line; 7, third cable line; 8, insulation layer; 9, conductive core line. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0033] like Figure 1 As shown, this embodiment provides a riser based on in situ leaching of uranium, the riser comprising an inner core layer 1, a reinforcement layer 2, an outer protective layer 3 and a cable group; the reinforcement layer 2 is sleeved on the outside of the inner core layer 1; the outer protective layer 3 is sleeved on the outside of the reinforcement layer 2, and the cross-section of the outer protective layer 3 is elliptical; the cable group is arranged between the outer protective layer 3 and the reinforcement layer 2, and the cable group is arranged along the height direction of the outer protective layer 3, and the cable group is a wavy line. Since the process of in situ leaching of uranium requires the riser to be placed underwater, the inner core layer 1 of the present application is a polymer including but not limited to a high molecular weight polymer. Polyethylene (HDPE), chlorinated polyethylene (CPE), polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polyamide (PA), polypropylene (PP), ultra-high molecular weight polyethylene, polyvinylidene fluoride (PVDF), the reinforcement layer 2 is made of glass fiber resin, polyester fiber, aramid fiber or basalt, and the outer protective layer 3 includes but is not limited to high molecular weight polyethylene (HDPE), polyvinyl chloride (PVC), polyvinylidene chloride (CPVC), and polyurethane elastic material. By selecting the above materials as the inner core layer 1, reinforcement layer 2 and outer protective layer 3 of the lifting pipe, the plasticity of the lifting pipe can be improved while protecting the cable. In addition, considering that the well is generally 100-600m deep, the present application sets the cable group to a wavy line shape. When placed underground, the wavy line shape can be stretched into a straight line, thereby extending the cable group. Compared with the spiral winding of the prior art, the present application not only has a simple cable structure, but also reduces the inductance of the cable group, making the transmission efficiency of electricity higher, improving economic benefits, and also improving the stability and service life of the submersible pump.

[0034] like Figure 2 As shown, in a specific embodiment of the present disclosure, the cable group includes a first cable group and a second cable group, the first cable group and the second cable group are centrally symmetrically arranged along the central axis of the inner core layer 1, the first cable group includes a first cable line 4 and a second cable line 5, the second cable group includes a third cable line 7 and a communication line 6, the first cable line 4, the second cable line 5 and the third cable line 7 constitute a three-phase line.

[0035] In a specific embodiment of the present disclosure, the relative arc length ratio of the cable group is 1.5-2.0 times the axial stretching ratio of the riser. This ensures that the stretchable length of the cable group is greater than the stretching length of the riser, so that the in situ leaching of uranium can proceed normally.

[0036] like Figure 3As shown, in a specific embodiment of the present disclosure, the first cable 4 includes a conductive core wire 9 and an insulating layer 8, the conductive core wire 9 is composed of fine metal wires, the insulating layer 8 is a rubber material, and the conductive core wire 9 is selected to be woven from fine metal wires, as shown in FIG. Figure 3 As shown in Figure A, when the lifting tube is not stretched, the conductive core wire 9 is soft and easy to bend. Figure 3 As shown in Figure B, the riser is stretched. The insulating layer 8 not only provides insulation but also allows free space for the conductive core 9 to stretch. Furthermore, the elastic insulating layer 8 maintains excellent insulation performance when the core is partially straightened. Because the riser is stretched during operation due to its own weight and the weight of the liquid being lifted, the cable needs to be stretch-resistant to protect the conductive core from damage. Therefore, the above-mentioned materials were selected to configure the cable to meet this requirement. The first cable 4, second cable 5, and third cable 7 are configured in the same manner as the communication cable 6.

[0037] In a specific embodiment of the present disclosure, the thickness of the outer protective layer 3 is 2-5 mm.

[0038] Example 2

[0039] This embodiment provides a riser design method for in-situ leaching of uranium, the method comprising:

[0040] Step S1, obtaining first information, wherein the first information includes an axial stretching rate of the riser;

[0041] In this application, the axial stretch rate of the riser refers to the axial stretch rate of each layer excluding the cable assembly, i.e., the ratio of the length of the riser increased after stretching to the original length. In this embodiment, a specific implementation is that the axial stretch rate of the riser is 0.50%-1.00% when the tension is 10-20 kN.

[0042] Step S2: determining second information based on the first information, wherein the second information includes relative arc length ratios of the cables and the communication line 6 in the cable group, wherein the cables and the communication line in the cable group are formed by connecting a plurality of unit arcs;

[0043] In this step, the calculation formula for the relative arc length ratio is:

[0044] β=x×α (1)

[0045] In formula (1), β represents the relative arc length ratio of the corresponding arcs of the cable line and the communication line 6, that is, under the unstretched condition, the percentage ratio of the total arc length of the cable line and the communication line 6 in the cable group relative to the total length of the riser to the total length of the riser; α represents the axial elongation of the riser; x is a preset coefficient, which is between 1.5 and 2.0 in the present invention. In theory, the total length of the cable line and the communication line arc after stretching is consistent with the total length of the riser after stretching. However, considering the operational safety of in-situ leaching uranium, the preset coefficient of this application is at least 1.5. At the same time, the larger the preset coefficient is set, the smaller the inductance generated by the cable when transmitting electricity. Considering the economic benefits, the maximum preset coefficient is 2.0.

[0046] Step S3: determining a calculation formula for arc parameters based on geometric principles, wherein the arc parameters include angle information, radius information, and arc length information corresponding to unit arcs of the cables and communication line 6 in the cable group;

[0047] Step S3 also includes steps S31, S32 and S33, which specifically include:

[0048] Step S31: Obtain the calculation formula for the unit arc length of the cables and communication lines in the riser according to the definition of the relative arc length ratio, and obtain the first formula information, specifically:

[0049] R=(β / 100+1)×L (2)

[0050] In formula (2), R represents the unit arc length of the cable and communication line in the riser; L represents the unit chord length of the riser.

[0051] Step S32: Obtain a calculation formula for the unit arc length of the cables and communication lines 6 in the riser and a calculation formula for the unit chord length of the riser based on geometric principles to obtain second formula information;

[0052] In this step, the formula for calculating the arc length of the cables and communication lines in the riser is:

[0053]

[0054] In formula (3), r represents the radius of the arc, in mm; θ represents half the angle of the unit arc, in degrees.

[0055] In this step, the formula for calculating the unit chord length of the riser is:

[0056] L=2r×sinθ (4)

[0057] In formula (4), r represents the radius of the arc, in mm; θ represents half the angle of the unit arc, in degrees.

[0058] Step S33: Determine a calculation formula corresponding to the angle information included in the arc parameters based on the first formula information and the second formula information.

[0059] In this step, the calculation formula corresponding to the angle information can be obtained by substituting formula (3) and formula (4) into formula (2):

[0060]

[0061] Formula (5) can be used to solve θ (half of the angle corresponding to the unit arc), thereby obtaining the angle corresponding to the unit arc, namely 2θ.

[0062] Step S4: determining the arc parameters of the riser according to the arc parameter calculation formula and the relative arc length ratio.

[0063] The step S4 also includes steps S41, S42 and S43, which specifically include:

[0064] Step S41: obtaining preset arc height information;

[0065] Step S42: Calculate according to the angle information and the preset arc height information to obtain third information, where the third information includes radius information corresponding to the unit arc.

[0066] In this embodiment, the calculation formula of the third information is:

[0067]

[0068] In formula (6), h represents the height information of the arc; γ represents the guarantee coefficient, which is 0.8-1.2, and θ is half of the angle corresponding to the unit arc.

[0069] The unique unit arc can be determined by the radius information corresponding to the unit arc and the angle information corresponding to the unit arc, and the unit arc length of the cable group and the unit chord length of the riser can be calculated by formula (3) and formula (4), thereby realizing the design of the cable line and communication line 6 in the riser, providing a riser with high economic benefits.

[0070] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0071] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0072] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A method for designing a riser for in-situ leaching uranium, comprising: The riser based on in situ leaching of uranium comprises: an inner core layer (1); a reinforcement layer (2), wherein the reinforcement layer (2) is sleeved on the outside of the inner core layer (1); an outer protective layer (3), wherein the outer protective layer (3) is sleeved on the outside of the reinforcement layer (2), and the cross section of the outer protective layer (3) is elliptical; and a cable group, wherein the cable group is arranged between the outer protective layer (3) and the reinforcement layer (2), the cable group is arranged along the height direction of the outer protective layer (3), and the cable group is wavy line-shaped; The riser design method based on in situ leaching of uranium comprises the following steps: Acquiring first information, the first information including an axial stretching rate of the riser; Determining second information based on the first information, the second information including relative arc length ratios of the cable lines and the communication lines (6) in the cable group, the cable lines and the communication lines in the cable group being formed by connecting a plurality of unit arcs; Determine a calculation formula for arc parameters according to geometric principles, wherein the arc parameters include angle information, radius information, and arc length information corresponding to unit arcs of the cable lines and communication lines (6) in the cable group; Determining the arc parameters of the riser according to the arc parameter calculation formula and the relative arc length ratio; The calculation formula for arc parameters is determined based on geometric principles, including: According to the definition of relative arc length ratio, a calculation formula for the unit arc length of the cable and the communication line (6) in the riser is obtained to obtain first formula information; According to the geometric principle, a calculation formula for the unit arc length of the cable and the communication line (6) in the riser and a calculation formula for the unit chord length of the riser are obtained to obtain the second formula information; A calculation formula corresponding to the angle information included in the arc parameters is determined according to the first formula information and the second formula information.

2. The riser design method for in situ leaching of uranium according to claim 1, characterized in that: Determining the arc parameters of the riser according to the arc parameter calculation formula and the relative arc length ratio includes: Get the preset arc height information; Calculation is performed based on the angle information and the preset arc height information to obtain third information, where the third information includes radius information corresponding to the unit arc.

3. The method for designing a riser for in-situ leaching of uranium according to claim 1, wherein: The cable group comprises a first cable group and a second cable group, wherein the first cable group and the second cable group are centrally symmetrically arranged along the central axis of the inner core layer (1).

4. The method for designing a riser for in-situ leaching of uranium according to claim 3, wherein: The first cable group includes a first cable line (4) and a second cable line (5), and the second cable group includes a third cable line (7) and a communication line (6).

5. The method for designing a riser for in-situ leaching of uranium according to claim 4, wherein: The first cable (4), the second cable (5) and the third cable (7) constitute a three-phase line.

6. The method for designing a riser for in-situ leaching of uranium according to claim 1, wherein: The relative arc length ratio of the cable group is 1.5-2.0 times the axial stretching ratio of the lifting tube.

7. The method for designing a riser for in-situ leaching of uranium according to claim 5, wherein: The first cable (4) comprises a conductive core wire (9) and an insulating layer (8), wherein the conductive core wire (9) is made of a thin metal wire, and the insulating layer (8) is made of a rubber material.

8. The method for designing a riser for in-situ leaching of uranium according to claim 1, wherein: The thickness of the outer protective layer (3) is 2-5 mm.

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