Segmented wear-resistant composite straight pipe and preparation method thereof

Abstract

The present invention provides a segmented wear-resistant composite straight pipe and a preparation method thereof, wherein the segmented wear-resistant composite straight pipe comprises at least one short pipe, and a plurality of the short pipes are connected to form a long pipe; and further comprises a composite layer sleeved outside the long pipe, wherein the composite layer comprises a steel wire layer and a rubber layer pressed and sleeved outside the steel wire layer, wherein the steel wire layer is spirally wound along the axial direction of the long pipe, and the thickness of the rubber layer is at least greater than the thickness of the steel wire layer. The composite layer comprises a steel wire layer and a rubber layer, wherein the steel wire layer can improve the pressure bearing capacity and stability of the long pipe, and the provision of the rubber layer can prevent the long pipe from being damaged and causing the material to fall directly outside the composite straight pipe, thereby improving the safety of the composite straight pipe in conveying materials.

Description

Technical Field

[0001] The invention relates to the technical field of wear-resistant conveying pipeline design, and in particular to a segmented wear-resistant composite straight pipe and a preparation method thereof. Background Art

[0002] Wear-resistant conveying pipelines are mainly used in industries such as electricity, coal, metallurgy, petroleum, machinery and chemical industry. Especially for concrete pumping, the material transportation process will cause very serious wear to the pipeline.

[0003] In order to avoid the pipes being replaced too quickly due to wear, double-layer straight pipes are generally used to improve the wear resistance of the pipes. However, the double-layer pipes will increase the material cost, and the double-layer straight pipes need to be formed in a composite manner. Once one of them is damaged, the probability of the other being damaged will be greatly increased. When metal pipes are pumped at high altitudes, due to the brittleness of the metal pipes, once the metal pipes are damaged, concrete will leak directly from the high altitude, with a certain probability of injuring the construction workers on the ground, which poses a high safety hazard. It can be seen that the safety factor of the conveying pipelines in the prior art is low. Summary of the invention

[0004] The embodiment of the present invention provides a segmented wear-resistant composite straight pipe and a preparation method thereof, which are used to solve the technical problem of low safety factor of the transmission pipeline in the prior art.

[0005] The embodiment of the present invention provides a segmented wear-resistant composite straight pipe, comprising: at least one short pipe, a plurality of the short pipes are connected to form a long pipe;

[0006] It also includes a composite layer sleeved on the outside of the long tube, the composite layer includes a steel wire layer and a rubber layer pressed and laminated on the outside of the steel wire layer, the steel wire layer is formed by spirally winding a steel wire rope along the axial direction of the long tube, and the thickness of the rubber layer is at least greater than the thickness of the steel wire layer.

[0007] According to the segmented wear-resistant composite straight pipe of one embodiment of the present invention, the steel wire layer includes at least one steel wire rope, and the steel wire rope is wound around the outer wall of the long pipe.

[0008] According to the segmented wear-resistant composite straight pipe of one embodiment of the present invention, the number of the steel wire ropes is 2 to 20.

[0009] According to the segmented wear-resistant composite straight pipe of one embodiment of the present invention, the steel wire layer and the long pipe are elastically pressed against each other so that the long pipe is in a prestressed compression state.

[0010] According to the segmented wear-resistant composite straight pipe of one embodiment of the present invention, the steel wire rope is connected to the outer wall of the long pipe by spot welding, and the welding spots formed by the steel wire rope on the surface of the outer wall of the long pipe are evenly spaced.

[0011] According to the segmented wear-resistant composite straight pipe of one embodiment of the present invention, the thickness of the rubber layer is greater than 1.2 times the diameter of the steel wire rope;

[0012] The winding angle of the steel wire rope is 30 to 70 degrees;

[0013] The steel wire rope is one of galvanized steel wire, copper-plated steel wire and uncoated steel wire.

[0014] According to an embodiment of the present invention, the segmented wear-resistant composite straight pipe, the short pipe is made by sand core casting or steel mold casting;

[0015] Adjacent short tubes are connected by argon arc welding or laser welding.

[0016] The present invention also provides a method for preparing the above-mentioned segmented wear-resistant composite straight pipe, comprising:

[0017] Connect multiple short tubes to form a long tube;

[0018] A steel wire rope is spirally wound around the long tube to form a steel wire layer;

[0019] A rubber material is laid on the outer side of the steel wire layer and covers the steel wire layer to form a rubber layer.

[0020] According to a method for preparing a segmented wear-resistant composite straight pipe according to an embodiment of the present invention, the step of spirally winding a steel wire rope outside the long pipe to form a steel wire layer comprises:

[0021] After a preset prestress is applied to the steel wire rope, the steel wire rope is spirally wound around the long tube to form the steel wire layer, so that the steel wire rope and the long tube are elastically pressed against each other.

[0022] According to a method for preparing a segmented wear-resistant composite straight pipe according to an embodiment of the present invention, the steel wire rope is connected to the outer wall of the long pipe by spot welding, and the welding spots formed by the steel wire rope on the surface of the outer wall of the long pipe are evenly spaced.

[0023] The embodiment of the present invention provides a segmented wear-resistant composite straight pipe and a preparation method, wherein the composite layer includes a steel wire layer and a rubber layer. The steel wire layer can improve the pressure bearing capacity and stability of the long pipe, while the provision of the rubber layer can prevent the long pipe from being damaged and causing the material to fall directly out of the composite straight pipe, thereby improving the safety of the composite straight pipe in conveying materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a segmented wear-resistant composite straight pipe of the present invention;

[0026] Figure 2 for Figure 1 The enlarged structural schematic diagram of A shown;

[0027] Figure 3 for Figure 1 The schematic diagram of the structure of the long tube shown;

[0028] Figure 4 for Figure 1 The manufacturing process diagram of the segmented wear-resistant composite straight pipe shown;

[0029] Figure 5 This is a flow chart of a method for preparing a segmented wear-resistant composite straight pipe according to an embodiment of the present invention;

[0030] Reference numerals:

[0031] 10, short tube; 20, long tube; 30, composite layer;

[0032] 310, steel wire layer; 320, rubber layer. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution 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. 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.

[0034] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other components or units inherent to these processes, methods, products or devices.

[0035] Please refer to Figures 1 to 4The present invention provides a segmented wear-resistant composite straight pipe, comprising: at least one short pipe 10, a plurality of short pipes 10 are connected to form a long pipe 20, it should be noted that the long pipe 20 is formed by connecting a plurality of short pipes 10, and the production efficiency of each short pipe 10 is higher than that of the long pipe 20 with the same material, and then the produced short pipes 10 are connected to form the long pipe 20, and then the production efficiency of the long pipe 20 is also improved, and the production yield of the short pipe 10 is higher than that of directly producing the long pipe 20. The segmented wear-resistant composite straight pipe also includes a composite layer 30 sleeved on the outside of the long pipe 20, the composite layer 30 includes a steel wire layer 310 and a rubber layer 320 pressed and composited on the outside of the steel wire layer 310, the steel wire layer 310 is formed by spirally winding a steel wire rope along the axial direction of the long pipe 20, and the thickness of the rubber layer 320 is at least greater than the thickness of the steel wire layer 310.

[0036] It is understandable that the composite layer 30 is mainly used to enhance the rigidity of the long tube 20, thereby improving the safety of the long tube 20 in conveying materials. The steel wire layer 310 is spirally wound around the outside of the long tube 20, thereby improving the pressure bearing capacity and stability of the long tube 20. The rubber layer 320 is composited with the steel wire layer 310, and the thickness of the rubber layer 320 is greater than the thickness of the steel wire layer 310, so that the outermost side of the composite layer 30 is the rubber layer 320, and once the long tube 20 is damaged during the process of conveying materials, since rubber has good tensile strength and tear resistance, the material will not leak out of the composite layer 30 in the first place, so that the staff can have time to repair the long tube 20 or stay away from the danger zone where the material falls, thereby improving the safety of the composite straight tube.

[0037] In one embodiment of the present invention, a plurality of short tubes 10 can be made by casting, and the plurality of short tubes 10 after being made can be connected by welding. For example, a plurality of short tubes 10 can be formed into a long tube 20 by sand core casting or steel mold casting. As for the connection between the connected short tubes 10, the long tube 20 can be formed by argon arc welding or laser welding. For example, if a 3-meter-long long tube 20 needs to be manufactured, a short tube 10 can be made first, for example, a short tube 10 of 300mm to 600mm can be made, which is equivalent to dividing the 3-meter long tube 20 into 5 to 10 sections, thereby the production efficiency of the short tube 10 is higher and the production cost can be reduced. In one embodiment of the present invention, it is preferred to connect the short tubes 10 by welding to form the long tube 20, and welding can enhance the integrity between the short tubes 10. It should be noted that the length of the short tube 10 is less than 1 meter, and the corresponding length of the long tube 20 is between 3 meters and 6 meters. Because the production process of the short tube 10 is simpler, the yield is higher, and the production cost of the short tube 10 is lower, the short tube 10 can be mass-produced, and then multiple short tubes 10 are connected to form a long tube 20. However, the strength of the long tube 20 itself must be met at the same time. If each long tube 20 includes too many short tubes, its own strength will not meet the use requirements. Therefore, the length of the long tube 20 is preferably about 3 meters. Please refer to Figure 2 and Figure 3 , E is the weld formed between two short tubes, and a plurality of short tubes 10 can be welded to form a long tube 20.

[0038] The material of the short tube 10 can be selected from 65Mn, high chromium cast iron or GCr15. In one embodiment of the present invention, the short tube 10 can be prepared by rolling and cutting a steel plate, and then using argon arc welding to form a welded pipe, and then undergoing quenching heat treatment to form the short tube 10. In other embodiments, a short tube 10 without a weld can also be selected, which is not limited here.

[0039] In one embodiment of the present invention, the steel wire layer 310 includes at least one steel wire rope, each of which is spirally wound on the outer wall of the long tube 20 according to a preset pitch. In order to balance production efficiency and firmness, the value of the preset pitch can be determined according to the length of the short tube 10 or the spiral winding requirements of the actual scene. There can be a certain interval between the multiple steel wire ropes, and the adjacent steel wire ropes are not overlapped. The steel wire ropes can be left-handed or right-handed, which is not limited here.

[0040] The steel wire rope is connected to the outer wall of the long tube 20 by spot welding, and the welding spots formed by the steel wire rope on the outer wall surface of the long tube 20 are evenly spaced. Specifically, the number of steel wire ropes can be 2-20, and the steel wire ropes are formed by winding at intervals. Preferably, the number of steel wire ropes can be 2-10, and more preferably, 2-6. The material composition of the steel wire rope can be selected from one of galvanized steel wire, copper-coated steel wire and uncoated steel wire. And the angle of the steel wire rope winding can be 30 degrees to 70 degrees, preferably 53 degrees to 56 degrees, and more preferably 54.5 degrees. The steel wire layer 310 formed by winding the steel wire rope has better stability for the outer wall of the long tube 20, and then the weight of the composite straight tube will not be overweight due to excessive winding of the steel wire rope. On the other hand, the strength of the steel wire layer 310 also meets the strength requirements of the composite straight tube.

[0041] It should be noted that when the steel wire layer 310 is connected to the long tube 20, a preset prestress value needs to be applied so that the long tube 20 is in a prestressed compression state. That is, the steel wire layer 310 and the long tube 20 are elastically pressed against each other, so that when the long tube 20 transports the material, the long tube 20 can offset the bearing pressure when pumping the material, thereby improving the transportation stability of the long tube 20. In one embodiment of the present invention, the prestress is 3 to 10Mpa.

[0042] Please continue to refer to Figure 2 The rubber layer 320 is compounded on the steel wire layer 310, and the thickness of the rubber layer 320 is greater than the thickness of the steel wire layer 310, so that the steel wire layer 310 will not leak out of the rubber layer 320. In one embodiment of the present invention, the thickness of the rubber layer 320 is greater than 1.2 times the diameter of the steel wire rope. Figure 2D2 is 1.2 times of D1, and D1 corresponds to the thickness of the steel wire layer 310, D2 corresponds to the thickness of the rubber layer 320, and the composite part of the rubber layer 320 and the steel wire layer 310 corresponds to the thickness of the steel wire layer 310, and the difference between D2 and D1 is the pure rubber bonding layer.

[0043] In order to meet the requirements of lightweight pump trucks, the quality of the composite straight pipe cannot be too high, and the rubber layer 320 needs to be able to protect the long tube 20. Therefore, it is preferred that the thickness of the rubber layer 320 is at least one-fifth of the diameter of the wire rope, and the thickness of the rubber layer 320 is not much increased. In addition to being composited with the steel wire layer 310, the rubber layer 320 is also provided with a rubber bonding layer formed by a portion of pure rubber. Once the long tube 20 is damaged, the outermost composite layer 30 of the rubber layer 320 will form a bulge instead of directly breaking. Therefore, the material will not fall out of the composite layer 30 quickly, but will be temporarily stored between the long tube 20 and the composite layer 30, thereby improving the safety of transportation by the long tube 20. Taking the commonly used steel as an example, such as Q345, the density is 7.85g / cm 3 , and according to the wall thickness of 2-3mm, a 3-meter-long steel pipe with a wall thickness of 2mm and an inner diameter of 120mm weighs about 9kg. The composite straight pipe of the present application can control the overall weight between 4.5kg and 6.5kg according to the density of the steel wire layer 310. Compared with the existing steel, the weight reduction ratio of the steel of the present application is about 28% to 38%, so the lightweight effect is significant.

[0044] Because the metal long tube 20 is brittle, under extreme working conditions, the material will have defects and is very easy to burst, causing concrete leakage and injuring operators. The tensile strength and tear resistance of rubber are better than those of steel. Therefore, after the rubber layer 320 and the steel wire layer 310 are composited, the stability and strength of the branch pipe are increased, and even if the long tube 20 breaks, bulging will occur between the rubber layer 320 and the long tube 20 without the risk of direct bursting. Therefore, the long tube 20 has higher stability and better safety for material transportation.

[0045] Please refer to Figure 4In one embodiment of the present invention, a plurality of short tubes 10 are prepared, and then the plurality of short tubes 10 are connected to form a long tube 20, so as to achieve the purpose of producing the long tube 20. The production efficiency and yield of the short tube 10 are too high, so the production efficiency of the long tube 20 can be improved. Furthermore, in order to improve the rigidity of the long tube 20 itself, a steel wire layer 310 is wound on the outer wall of the long tube 20 to improve the strength of the long tube 20. At the same time, in order to avoid the long tube from breaking and causing the raw materials in the long tube 20 to flow out and cause safety hazards, a rubber layer 320 is arranged outside the steel wire layer 310. By utilizing the good toughness of the rubber layer 320, when part of the long tube 20 breaks, the outflowing raw materials will only bulge in the rubber layer 320, and will not flow out immediately and cause safety hazards, thereby improving the safety of the composite straight tube to transport raw materials.

[0046] In summary, a plurality of short tubes 10 are connected to form a long tube 20, and the production efficiency of the short tube 10 is much higher than that of the long tube 20, so the short tubes 10 can be mass-produced and then connected to form the long tube 20, thereby improving the production efficiency of the long tube 20. The composite layer 30 includes a steel wire layer 310 and a rubber layer 320, and the steel wire layer 310 can improve the pressure bearing capacity and stability of the long tube 20, while the provision of the rubber layer 320 can prevent the long tube 20 from being damaged and causing the material to fall directly outside the composite straight tube, thereby improving the safety of the composite straight tube in conveying materials.

[0047] Please refer to Figure 5 The present invention also provides a method for preparing a segmented wear-resistant composite straight pipe, comprising:

[0048] S110, connecting multiple short tubes to form a long tube.

[0049] It should be noted that the seamless pipes produced by rolling 65Mn, high chromium cast iron or GCr15 materials have high production costs, thick tube walls, and uneven tube walls, which limits the application of such materials in wear-resistant pipes. Therefore, by connecting short tubes to obtain long tubes, 65Mn, high chromium cast iron or GCr15 materials can be applied to wear-resistant pipes. Because in the actual production process, the long tube is formed by connecting multiple short tubes. Compared with the long tube, the production efficiency of each short tube will be higher when the same material is used. The production efficiency of the long tube will be improved by connecting the produced short tubes to form a long tube, and the production yield of the short tube is higher than that of the long tube produced directly, which can reduce the production cost.

[0050] In addition, the short tubes can be made by sand core casting or steel mold casting. Adjacent short tubes can be connected by argon arc welding or laser welding.

[0051] S120, spirally winding a steel wire rope outside the long tube to form a steel wire layer.

[0052] The steel wire layer is spirally wound around the outside of the long tube, thereby improving the pressure bearing capacity and stability of the long tube. Specifically, in one embodiment of the invention, the steel wire layer includes at least one steel wire rope, and each steel wire rope is spirally wound around the outer wall of the long tube according to a preset pitch. In order to balance production efficiency and firmness, the value of the preset pitch can be determined according to the length of the short tube or the spiral winding requirements of the actual scene. There can be a certain interval between the multiple steel wire ropes, and adjacent steel wire ropes are not overlapped. The steel wire rope can be left-handed or right-handed, which is not limited here.

[0053] The steel wire rope is connected to the outer wall of the long tube by spot welding, and the welding spots formed by the steel wire rope on the surface of the outer wall of the long tube are evenly spaced. Specifically, the number of wound steel wire ropes can be 2-20, and multiple steel wire ropes can be wound at intervals to form a steel wire layer. Preferably, the number of steel wire ropes can be 2-10, and more preferably 2-6. The material composition of the steel wire rope can be selected from one of galvanized steel wire, copper-plated steel wire and uncoated steel wire. And the angle of the steel wire rope winding can be 30 degrees to 70 degrees, preferably 53 degrees to 56 degrees, and more preferably 54.5 degrees. When the angle of the steel wire rope winding is 54.5 degrees, the formed steel wire layer satisfies the weight of the overall composite pipe within the preset range while the stiffness achieved is also within the required range. The steel wire layer formed by the steel wire rope winding has better stability for the outer wall of the long tube, and then the weight of the composite straight tube will not be overweight due to excessive winding of the steel wire rope, and on the other hand, the strength of the steel wire layer also meets the strength requirements of the composite straight tube.

[0054] It should be noted that when the steel wire layer is connected to the long tube, a preset prestress can be applied to the steel wire rope, and then the steel wire rope is spirally wound around the long tube. In this way, the steel wire rope and the long tube are elastically pressed against each other, so that the long tube is in a prestressed compression state. That is, the steel wire layer and the long tube are elastically pressed against each other, so that when the long tube is conveying materials, the long tube can offset the bearing pressure when pumping materials, thereby improving the stability of the long tube conveying. In one embodiment of the present invention, a preset prestress is applied to the steel wire rope to straighten the steel wire rope. When the steel wire rope is spirally wound around the outer wall of the long tube, the preset prestress applied to the steel wire rope can produce elastic pressure against the long tube, and the preset prestress value is preferably 3 to 10Mpa.

[0055] S130, laying a rubber material on the outer side of the steel wire layer and covering the steel wire layer to form a rubber layer.

[0056] The rubber layer and the steel wire layer are combined to form a composite layer to protect the outer tube. Specifically, the thickness of the rubber layer is greater than the thickness of the steel wire layer, so that the steel wire layer will not leak out of the rubber layer. In one embodiment of the present invention, the thickness of the rubber layer is greater than 1.2 times the diameter of the steel wire rope. That is, Figure 2D2 is 1.2 times of D1, and D1 corresponds to the thickness of the steel wire layer, D2 corresponds to the thickness of the rubber layer, and the composite part of the rubber layer and the steel wire layer corresponds to the thickness of the steel wire layer, and the difference between D2 and D1 is the pure rubber bonding layer.

[0057] In order to meet the requirements of lightweight pump trucks, the thickness of the rubber layer is preferably at least one-fifth of the diameter of the wire rope. In addition to being compounded with the wire layer, the rubber layer is also provided with a rubber bonding layer formed by a portion of pure rubber. Once the long tube is damaged, the outermost composite layer of the rubber layer will form a bulge instead of directly breaking. Therefore, the material will not fall out of the composite layer quickly, but will be temporarily stored between the long tube and the composite layer, thereby improving the safety of long tube transportation.

[0058] Because the long metal tube is brittle, under extreme working conditions, the material will have defects and easily burst, causing concrete leakage and injuring operators. The tensile strength and tear resistance of rubber are better than those of steel. Therefore, after the rubber layer and the steel wire layer are compounded, the stability and strength of the branch pipe are increased, and even if the long tube breaks, bulging will occur between the rubber layer and the long tube, and there will be no risk of direct bursting. Therefore, the long tube has higher stability and better safety for material transportation.

[0059] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying 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 to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A segmented wear-resistant composite straight pipe, characterized in that: include: At least one short tube, a plurality of the short tubes are connected to form a long tube; It also includes a composite layer sleeved outside the long tube, the composite layer includes a steel wire layer and a rubber layer pressed and sleeved outside the steel wire layer, the steel wire layer is formed by spirally winding a steel wire rope along the axial direction of the long tube, and the thickness of the rubber layer is at least greater than the thickness of the steel wire layer; The steel wire layer includes at least one steel wire rope, and the steel wire rope is wound around the outer wall of the long tube; The steel wire layer and the long tube are elastically pressed against each other so that the long tube is in a prestressed compression state; The steel wire rope is connected to the outer wall of the long tube by spot welding, and the welding points formed by the steel wire rope on the surface of the outer wall of the long tube are evenly spaced; The short tubes are made by sand core casting or steel mold casting; adjacent short tubes are connected by argon arc welding or laser welding.

2. The segmented wear-resistant composite straight pipe according to claim 1 is characterized in that: The number of the steel wire ropes is 2 to 20.

3. The segmented wear-resistant composite straight pipe according to claim 1 is characterized in that: The thickness of the rubber layer is greater than 1.2 times the diameter of the steel wire rope; The winding angle of the steel wire rope is 30 to 70 degrees; The steel wire rope is one of galvanized steel wire, copper-plated steel wire and uncoated steel wire.

4. A method for preparing a segmented wear-resistant composite straight pipe according to any one of claims 1 to 3, characterized in that: include: Connect multiple short tubes to form a long tube; Helically winding a steel wire rope outside the long tube to form a steel wire layer; A rubber material is laid on the outer side of the steel wire layer and covers the steel wire layer to form a rubber layer.

5. The method for preparing a segmented wear-resistant composite straight pipe according to claim 4, characterized in that: The step of spirally winding a steel wire rope outside the long tube to form a steel wire layer comprises: After a preset prestress is applied to the steel wire rope, the steel wire rope is spirally wound around the long tube to form the steel wire layer, so that the steel wire rope and the long tube are elastically pressed against each other.

6. The method for preparing a segmented wear-resistant composite straight pipe according to claim 5, characterized in that: The steel wire rope is connected to the outer wall of the long tube by spot welding, and the welding spots formed by the steel wire rope on the surface of the outer wall of the long tube are evenly spaced.

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