Preparation method of impact-resistant sheath, impact-resistant sheath and application method of impact-resistant sheath

Abstract

The invention provides a preparation method of an anti-impact sheath, the anti-impact sheath and an application method thereof.The preparation method comprises the steps that a metal material is rolled to prepare a tubular structural body, and the tubular structural body comprises a containing cavity formed in a defined mode and an opening structure communicating with the containing cavity; the accommodating cavity and the opening structure penetrate through the sheath along the axial direction of the tubular structural body, and the opening structure is communicated with the accommodating cavity along the radial direction of the tubular structural body; and forming at least one via hole along the radial direction of the tubular structure body on the tubular structure body to obtain the impact-resistant sheath. The preparation method of the anti-impact sheath is simple and easy to implement, the tubular structural body is provided with the two key structures, namely the containing cavity formed through enclosing and the opening structure communicating with the containing cavity, an object needing to be protected can be conveniently placed into the containing cavity from the side face, use convenience is improved, the object needing to be protected can be protected, and the service life of the anti-impact sheath is prolonged. The via hole can be used as a fixing point, the sheath and the to-be-protected pipeline can be fixed together, and the overall stability is improved.

Description

Technical Field

[0001] The present application relates to the field of pipeline protection, and in particular to a method for preparing an impact-resistant sheath, an impact-resistant sheath and an application method thereof. Background Art

[0002] In some specific application scenarios, a certain section of the laid pipeline cannot be buried below the ground, and there is a risk that rocks may fall from a great height and directly hit the surface of the pipeline, causing damage to the outer surface of the pipeline or even penetration.

[0003] Therefore, how to improve the pipeline's anti-smashing ability has become an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a method for preparing an impact-resistant sheath, an impact-resistant sheath and an application method thereof, so as to improve the anti-smashing ability of a pipeline.

[0005] In the first aspect, an embodiment of the present application provides a method for preparing an impact-resistant sheath, comprising: rolling a metal material to prepare a tubular structure, the tubular structure comprising a accommodating cavity formed by an enclosure and an opening structure connected to the accommodating cavity, the accommodating cavity and the opening structure both penetrate the sheath along the axial direction of the tubular structure, and the opening structure is connected to the accommodating cavity along the radial direction of the tubular structure; at least one through hole is formed on the tubular structure along its radial direction to obtain the impact-resistant sheath.

[0006] According to an embodiment of the first aspect of the present application, the step of preparing a tubular structure also includes: forming a first inclined surface and a second inclined surface on the circumference of the tubular structure, wherein the first inclined surface and the second inclined surface are respectively arranged opposite to each other on the circumference of the tubular structure, the first inclined surface has a first contact end in contact with the accommodating cavity, and the second inclined surface has a second contact end in contact with the accommodating cavity; the first inclined surface and the second inclined surface are distributed in a V-shape, and the first contact end and the second contact end are spaced a preset distance apart to form an opening structure.

[0007] According to an embodiment of the first aspect of the present application, the preset distance d is in the range of 1 mm to 30 mm.

[0008] According to an embodiment of the first aspect of the present application, the angle α between the first inclined surface and the second inclined surface ranges from 50° to 70°.

[0009] According to an embodiment of the first aspect of the present application, the preparation method further includes: welding the rolled tubular structure to close the open structure to form a closed sleeve.

[0010] In the second aspect, an embodiment of the present application provides an impact-resistant sheath prepared by the above-mentioned preparation method, the impact-resistant sheath includes a tubular structure, the tubular structure encloses a accommodating cavity, and has an opening structure connected to the accommodating cavity, the accommodating cavity and the opening structure both penetrate the sheath along the axial direction of the tubular structure, and the opening structure is connected to the accommodating cavity along the radial direction of the tubular structure; the tubular structure is provided with at least one through hole along its radial direction.

[0011] According to an embodiment of the second aspect of the present application, the impact-resistant sheath further includes a sealing portion, which covers the opening structure to form a containing cavity.

[0012] According to an embodiment of the second aspect of the present application, the impact-resistant sheath further includes a welding rod, and the welding rod cooperates with the through hole to perform positioning.

[0013] According to an embodiment of the first aspect of the present application, the adjusting member also includes a connecting rod and a connecting plate, the connecting rod extends along a first direction, the connecting rod is connected between the connecting plate and the adjusting box, the supporting body is also provided with a fourth slide groove, a support plate is provided in the fourth slide groove, the support plate is slidably connected to the fourth slide groove, and the support plate is fixedly connected to the connecting plate to support the connecting plate.

[0014] In a third aspect, an embodiment of the present application provides an application method of an impact-resistant sheath, wherein the impact-resistant sheath is prepared by the above-mentioned preparation method, and comprises the following steps: sleeve the impact-resistant sheath on the outer wall of a pipe substrate, wherein the inner diameter of the impact-resistant sheath matches the outer diameter of the pipe substrate; weld the opening structure to form a sealing portion; weld the via hole to connect the outer wall of the pipe substrate to the impact-resistant sheath.

[0015] According to an embodiment of the third aspect of the present application, welding of the opening structure and / or welding of the through-hole includes: welding of the base layer: welding with tough welding materials to improve toughness; welding of the cover layer: welding with impact-resistant welding materials to improve impact resistance, and the cover layer is located on the side of the base layer facing away from the pipe substrate.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] The preparation method of the impact-resistant sheath of the present application is to roll the metal material, and through a specific rolling process, the metal material is enclosed to form a tubular structure, and the tubular structure has two key structures, namely a housing cavity formed by the enclosure and an opening structure connected to the housing cavity. The housing cavity is used to accommodate objects that need to be protected, such as pipes, etc. It and the opening structure both penetrate the impact-resistant sheath along the axial direction of the tubular structure, which can ensure that the pipes, etc. are protected in the entire length direction. The opening structure is connected to the housing cavity along the radial direction of the tubular structure, which is convenient for placing the objects that need to be protected into the housing cavity from the side, thereby improving the convenience of use. The through hole can be used as a fixing point, and the impact-resistant sheath is fixed to the pipe to be protected by welding, bolts, rivets or other fasteners to improve the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0019] Figure 1 A schematic diagram of a process for preparing an impact-resistant sheath according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the impact-resistant sheath according to an embodiment of the present application;

[0021] Figure 3 A schematic cross-sectional structure diagram of an impact-resistant sheath according to an embodiment of the present application;

[0022] Figure 4 A schematic diagram of a partial structure of an impact-resistant sheath according to an embodiment of the present application;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the sealing portion of the impact-resistant sheath according to an embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the application structure of the impact-resistant sheath according to an embodiment of the present application;

[0025] Figure 7 It is a cross-sectional schematic diagram of a via-hole sealing portion of an impact-resistant sheath according to an embodiment of the present application.

[0026] Reference numerals:

[0027] 100, tubular structure; 101, first inclined surface; 102, second inclined surface; 103, first contact end; 104, second contact end;

[0028] 110, accommodating cavity; 120, opening structure; 130, via hole; 140, sealing portion; 141, first base layer; 142, first cover layer; 150, via hole sealing portion; 151, second base layer; 152, second cover layer;

[0029] 200. Pipeline matrix. DETAILED DESCRIPTION

[0030] In order to make the application purpose, technical solution and beneficial technical effect of the present application clearer, the present application is further described in detail in conjunction with the embodiments below. It should be understood that the embodiments described in this specification are only for explaining the present application, not for limiting the present application.

[0031] For simplicity, this application only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an unclearly recorded range; and any lower limit can be combined with other lower limits to form an unclearly recorded range, and any upper limit can be combined with any other upper limit to form an unclearly recorded range. In addition, although not clearly recorded, each point or single value between the range endpoints is included in the range. Thus, each point or single value can be combined with any other point or single value as its own lower limit or upper limit or with other lower limits or upper limits to form an unclearly recorded range.

[0032] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0033] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] The above application content of the present application is not intended to describe each disclosed embodiment or each implementation in the present application. The following description more specifically illustrates exemplary embodiments. In many places throughout the application, guidance is provided by a series of examples, which can be used in various combinations. In each example, enumeration is only used as a representative group and should not be interpreted as exhaustive.

[0036] In order to protect the pipeline matrix and improve the pipeline's anti-smashing ability, the embodiments of the present application provide a method for preparing an impact-resistant sheath, an impact-resistant sheath and an application method thereof. The embodiments will be described below in conjunction with the accompanying drawings.

[0037] Please also read Figures 1 to 3 In a first aspect, an embodiment of the present application provides a method for preparing an impact-resistant sheath, comprising:

[0038] S1: Rolling a metal material into a round shape to prepare a tubular structure 100, wherein the tubular structure 100 comprises a housing cavity 110 formed by enclosing and an opening structure 120 communicating with the housing cavity 110, wherein both the housing cavity 110 and the opening structure 120 penetrate the sheath along the axial direction of the tubular structure 100, and the opening structure 120 communicates with the housing cavity 110 along the radial direction of the tubular structure 100;

[0039] S2: forming at least one through hole 130 along the radial direction of the tubular structure 100 to obtain an impact-resistant sheath.

[0040] The metal material is rolled up, and through a specific rolling process, the metal material is enclosed to form a tubular structure 100. The tubular structure 100 has two key structures, namely, an enclosure cavity 110 and an opening structure 120 communicating with the cavity 110.

[0041] The accommodating cavity 110 is used to accommodate objects that need to be protected, such as cables, pipes, etc. The accommodating cavity 110 and the opening structure 120 both penetrate the sheath in the axial direction of the tubular structure 100, which means that the accommodating cavity 110 and the opening structure 120 are continuous from one end to the other end of the sheath. This design is conducive to the penetration of objects and can ensure that the objects are protected in the entire length direction.

[0042] The opening structure 120 is connected to the accommodating cavity 110 along the radial direction of the tubular structure 100, so that the object to be protected can be placed in the accommodating cavity 110, thereby improving the convenience of use. When the object to be protected is placed in the accommodating cavity 110, the opening structure 120 can allow the tubular structure 100 to expand to a certain size, so that the inner diameter of the tubular structure 100 is larger than the outer diameter of the object to be protected, thereby facilitating the placement of the object to be protected in the accommodating cavity 110.

[0043] The metal material forming the tubular structure 100 generally has high hardness and toughness, and can absorb and disperse external impact forces, thereby improving the anti-smashing ability of the protected pipe. Exemplarily, the material includes alloy steel containing Mn13 or X120Mn12. Among them, the 13 in Mn13 refers to the mass percentage of Mn element is 13%. The X in X120Mn12 means ultra-high carbon content, 120 refers to the mass percentage of carbon element is 1.2%, and 12 refers to the mass percentage of Mn element is 12%.

[0044] The metal material provided in the embodiment of the present application is in a single-phase austenite structure at room temperature and has good toughness. Under high impact loads, a hardened layer with high hardness will be produced on its surface to resist impact wear, thereby being able to well protect the pipeline from external impact and having strong anti-smashing ability.

[0045] Specifically, in the embodiments of the present application, the metal material is selected from Mn13 high manganese steel or X120Mn12 high manganese steel. Before being impacted and during the processing and forming process, the structure of these two metal materials is austenite, and their hardness is usually around 200HB. They have the characteristics of low hardness, high toughness and good processing performance. They can be easily deformed to complete operations such as rolling and pipe making, and the processing difficulty is low.

[0046] After experiencing the impact of falling rocks, the surfaces of the above two materials will undergo a phase change from austenite to martensite. After the phase change, their hardness will be significantly improved, usually to 550HB~650HB, which can significantly improve the wear resistance of the sheath surface and further improve the ability to resist impact wear. At the same time, it can also have good corrosion resistance to provide longer protection in harsh environments.

[0047] In summary, by configuring the sheath to be made of an alloy steel material containing Mn13 or X120Mn12, the sheath can have good impact resistance, wear resistance and corrosion resistance while maintaining easy processing.

[0048] On the prepared tubular structure 100, a specific processing technology, such as drilling, punching, etc., is used to form at least one through hole 130 along its radial direction. The presence of these through holes 130 can effectively enhance the impact resistance of the sheath. When subjected to external impact, the through holes 130 can play a role in buffering and dispersing stress, avoiding the impact force from being concentrated on a certain point, thereby improving the overall impact resistance of the sheath.

[0049] The through hole 130 can be used as a fixing point to fix the jacket to the pipe to be protected by welding, bolts, rivets or other fasteners to improve the overall stability. In addition, the through hole 130 can facilitate internal inspection and maintenance to ensure that the pipe matrix is ​​in good condition and to detect and deal with potential problems in a timely manner.

[0050] The through hole 130 can be formed on the wall of the tubular structure 100 by cold working (such as drilling, water jet cutting, etc.).

[0051] The present application does not limit the number of the through holes 130 , which may be one or more. The number of the through holes 130 is preferably more than one, which can improve the connection strength between the sheath and the pipe to be protected.

[0052] The plurality of via holes 130 are arranged at equal distances at a first distance in the circumferential direction of the sheath, and the plurality of via holes 130 are arranged at equal distances at a second distance in the axial direction of the sheath.

[0053] In some embodiments, the first distance and the second distance may be equal.

[0054] The plurality of vias 130 are arranged at equal distances at a first distance in the circumferential direction of the sheath, that is, the plurality of vias 130 are evenly distributed at a fixed spacing (first distance) in the circumferential direction of the sheath. The plurality of vias 130 are arranged at equal distances at a second distance in the axial direction of the sheath, that is, the plurality of vias 130 are evenly distributed at a fixed spacing (second distance) in the axial direction of the sheath 1.

[0055] The evenly distributed vias 130 help disperse the external impact force and avoid damage caused by concentrated force in a certain area. The evenly distributed vias 130 make the overall structure of the sheath more balanced and reduce the stress concentration that may be caused by uneven distribution. The evenly distributed vias 130 provide more fixing points, improve the connection stability between the sheath and the pipe substrate, and ensure that the sheath will not loosen or fall off.

[0056] The present application does not limit the diameter of the via hole 130 , and illustratively, the diameter is 20 to 50 mm, and specifically can be 20 mm, 30 mm, 40 mm, or 50 mm.

[0057] See also Figure 3 and Figure 4In some embodiments, the step of preparing the tubular structure 100 also includes: forming a first inclined surface 101 and a second inclined surface 102 on the circumference of the tubular structure 100, wherein the first inclined surface 101 and the second inclined surface 102 are respectively arranged opposite to each other on the circumference of the tubular structure 100, the first inclined surface 101 and the accommodating cavity 110 have a first contact end 103 in contact with each other, and the second inclined surface 102 and the accommodating cavity 110 have a second contact end 104 in contact with each other; the first inclined surface 101 and the second inclined surface 102 are distributed in a V-shape, and the first contact end 103 and the second contact end 104 are spaced a preset distance apart to form an opening structure 120.

[0058] A first inclined surface 101 and a second inclined surface 102 are formed in the circumference of the tubular structure 100. The first inclined surface 101 and the second inclined surface 102 are arranged relatively in the circumference of the tubular structure 100. The first inclined surface 101 and the second inclined surface 102 are V-shaped structures in the circumference of the tubular structure 100. The V-shaped structure is triangular in shape, which is convenient for subsequent welding. In the subsequent welding process, sufficient space is provided for welding equipment (such as welding rods in arc welding and welding guns in gas shielded welding), which can easily reach the root for welding operations. For example, during manual arc welding, the welder can flexibly adjust the angle of the welding rod so that it can smoothly enter the bottom of the groove to ensure that the root is welded through. At the same time, the opening shape of the V-shaped structure is conducive to the welder observing the molten pool during the welding process. The molten pool is a liquid metal area formed after the base material and the filler metal are melted during welding. Observing the molten pool is crucial to ensure welding quality. Because the V-shaped structure is opened at a certain angle, construction workers can clearly see the formation, flow and fusion of the molten pool with both sides of the groove, and promptly discover welding defects such as porosity and slag inclusions. They can also adjust welding parameters such as welding current and welding speed based on the observed situation.

[0059] The first inclined surface 101 and the accommodating cavity 110 have a first contact end 103 in contact with each other, and the second inclined surface 102 and the accommodating cavity 110 have a second contact end 104 in contact with each other. The first contact end 103 and the second contact end 104 are spaced apart by a preset distance to facilitate welding of the impact-resistant sleeve and the protected pipe. The preset distance d allows the impact-resistant sleeve to be welded to the protected pipe to improve stability.

[0060] See also Figure 4 In some embodiments, the preset distance d ranges from 1 mm to 30 mm.

[0061] The width of the preset distance d is within the above range, which can ensure the convenience of operation without affecting the overall impact resistance of the sheath.

[0062] See also Figure 4In some embodiments, the angle α between the first inclined surface 101 and the second inclined surface 102 ranges from 20° to 70°.

[0063] The angle α between the first inclined surface 101 and the second inclined surface 102 cannot be too small. This is because if the groove angle is too small, it will be difficult for the arc to penetrate the groove root during welding, resulting in poor fusion at the root, and welding defects such as incomplete penetration and slag inclusion are likely to occur, so that the weld metal at the root cannot be fully integrated with the parent material.

[0064] The angle α between the first inclined surface 101 and the second inclined surface 102 cannot be too large. When the groove angle is too large, the amount of welding filler metal will increase greatly, which will not only increase the welding cost, but also increase the welding deformation. In addition, due to the increase in the shrinkage of the weld metal during the cooling process, the weldment will be greatly deformed, affecting the dimensional accuracy of the weldment and the subsequent assembly work.

[0065] For example, the included angle α between the first inclined surface 101 and the second inclined surface 102 may be 20°, 30°, 40°, 45°, 50°, 60° or 70°.

[0066] In the present application, the included angle α between the first inclined surface 101 and the second inclined surface 102 is within the above range, which can ensure the impact and wear resistance of the weld at the joint.

[0067] In some embodiments, the thickness h of the tubular structure in the radial direction ranges from 20 mm to 300 mm.

[0068] In some embodiments, the preparation method further comprises: welding the rolled tubular structure 100 to close the opening structure 120 to form a closed sleeve.

[0069] The rolled tubular structure 100 is welded to form a sealing portion 140 to close the opening structure 120 to form a closed sleeve. Since the closed sleeve is an integral structure, it can better disperse stress when subjected to external pressure (such as soil pressure, mechanical collision, etc.). The closed shape makes it less likely for the sleeve to deform when subjected to bending, stretching and other forces, and has a strong anti-deformation ability.

[0070] Please also read Figure 2 and Figure 3In the second aspect, an embodiment of the present application provides an impact-resistant sheath prepared by the above-mentioned preparation method, the impact-resistant sheath includes a tubular structure 100, the tubular structure 100 encloses a accommodating cavity 110, and has an opening structure 120 connected to the accommodating cavity 110, the accommodating cavity 110 and the opening structure 120 both penetrate the sheath along the axial direction of the tubular structure 100, and the opening structure 120 is connected to the accommodating cavity 110 along the radial direction of the tubular structure 100; the tubular structure 100 is provided with at least one through hole 130 along its radial direction.

[0071] The main part of the impact-resistant sheath is a tubular structure 100, which is made of high-strength, impact-resistant metal material to ensure the integrity of its own structure when subjected to external impact.

[0072] The tubular structure 100 encloses a housing cavity 110 for placing the pipe to be protected. The housing cavity 110 and the opening structure 120 penetrate the sheath along the axial direction of the tubular structure 100. This penetration design allows the protected pipe to be easily inserted or removed from one end of the sheath.

[0073] The opening structure 120 is connected to the accommodating cavity 110 along the radial direction of the tubular structure 100 , and also penetrates the sheath along the axial direction. The design of the opening structure 120 facilitates placing the pipe to be protected into the accommodating cavity 110 .

[0074] The tubular structure 100 is provided with at least one through hole 130 along its radial direction. These through holes 130 have multiple functions. On the one hand, when the sheath is subjected to external impact, the through holes 130 can play a role in buffering and dispersing stress. The impact force can be dispersed over a larger range through the distribution of the through holes 130, thereby reducing local stress concentration and improving the overall impact resistance of the sheath. On the other hand, the through holes 130 can be used as a fixing point to fix the sheath to the pipe to be protected by welding, bolts, rivets or other fasteners to improve the overall stability.

[0075] See also Figure 2 , Figure 3 and Figure 5 In some embodiments, the impact-resistant jacket further includes a sealing portion 140 , and the sealing portion 140 covers the opening structure 120 to form the accommodating cavity 110 .

[0076] The sealing part 140 covers the opening structure 120 to form a closed sleeve. Since the closed sleeve is an integral structure, it can better disperse stress when subjected to external pressure (such as soil pressure, mechanical collision, etc.). The closed shape makes it less likely for the sleeve to deform when subjected to bending, stretching and other forces, and has a strong anti-deformation ability.

[0077] The sealing part 140 may be formed by welding. Exemplarily, the sealing part 140 includes a first primer layer 141 and a first cover layer 142 .

[0078] The first base layer 141 welding is the first welding performed at the root of the weld joint, and its main function is to ensure that the root of the weld can be fully melted through, so that the two ends of the tubular structure 100 can be well connected at the root, thereby ensuring the overall strength and sealing of the weld.

[0079] The first cover layer 142 can protect the metal inside the weld, preventing it from being directly exposed to the external environment and being oxidized, corroded, etc. Especially in some harsh working environments, such as moisture, acid, alkali and other corrosive media, the protective effect of the first cover layer 142 is particularly important, which can extend the service life of the weld and ensure the safety and reliability of the welded structure.

[0080] In some embodiments, the impact-resistant sheath further includes a welding rod, and the welding rod cooperates with the through hole 130 to perform positioning.

[0081] The impact-resistant sheath is provided with through holes 130 of specific specifications and sizes, and the size of the welding rod is designed according to the shape and size of these through holes 130. For example, the welding rod can be tightly matched with the through hole 130 by welding. After the welding rod is inserted into the through hole 130 for welding, due to the precise size fit between the two, the welding rod fixes the sheath and the pipe, and they cannot shake or move at will in the through hole 130. This tight fit effectively limits the movement of the welding rod in a specific direction, thereby realizing a precise limiting function. Through this matching and limiting mechanism of the welding rod and the through hole 130, the internal structure of the impact-resistant sheath can remain relatively stable when subjected to external force impact, thereby improving the overall impact resistance and reliability.

[0082] See also Figure 5 and Figure 6 In a third aspect, an embodiment of the present application provides an application method of an impact-resistant sheath. The impact-resistant sheath is prepared by the above-mentioned preparation method, and comprises the following steps: sleeve the impact-resistant sheath on the outer wall of the pipe substrate 200, and the inner diameter of the impact-resistant sheath matches the outer diameter of the pipe substrate 200; weld the opening structure 120 to form a sealing portion 140; weld the through hole 130 to connect the outer wall of the pipe substrate 200 to the impact-resistant sheath.

[0083] The impact-resistant sheath is placed on the outer wall of the pipeline substrate 200. In this process, it is necessary to ensure that the inner diameter of the impact-resistant sheath matches the outer diameter of the pipeline substrate 200. On the one hand, if the inner diameter of the impact-resistant sheath is too large, there will be a gap between the sheath and the pipeline. When impacted, the sheath cannot effectively distribute the impact force evenly to the pipeline, reducing the protective effect; size matching can make the impact-resistant sheath fit tightly on the pipeline substrate 200, laying a good foundation for subsequent protection work.

[0084] After the impact-resistant sheath is installed, the opening structure 120 is welded to form a sealing portion 140. The opening structure 120 exists to facilitate the installation of the impact-resistant sheath on the pipeline, but after the installation is completed, it needs to be welded to form a sealing portion 140. This sealing portion 140 has multiple important functions. It can not only prevent external moisture, impurities, etc. from entering the gap between the impact-resistant sheath and the pipeline matrix 200, and avoid pipeline corrosion caused by impurity accumulation or moisture erosion, which affects the life of the pipeline; at the same time, the sealing portion 140 can also enhance the connection stability between the impact-resistant sheath and the pipeline matrix 200, so that when impacted, they can work better together to resist external forces.

[0085] The vias 130 are welded to connect the outer wall of the pipe base 200 with the impact-resistant sheath. By welding the vias 130, a more solid connection structure is formed between the two, ensuring that when impacted, the impact-resistant sheath can effectively disperse and absorb the impact force, thereby protecting the pipe base 200 from damage to the greatest extent.

[0086] In some embodiments, welding the opening structure 120 and / or welding the via 130 includes: base layer welding: welding with tough welding materials to improve toughness; cover layer welding: welding with impact-resistant welding materials to improve impact resistance.

[0087] The base layer is welded with stainless steel welding materials with good toughness (such as 308L welding wire / electrode) to ensure that the joint weld is well connected and has sufficient toughness. Tough welding materials can also be other welding materials.

[0088] The base layer is the starting layer of welding and is in direct contact with the pipe substrate 200 to be protected. The use of tough welding materials can ensure a good bond between the weld and the parent material, effectively avoiding defects such as cracks in the initial stage of welding, and making the connection of the welded joint more firm and reliable.

[0089] During the welding process, large welding stress may be generated. Tough welding materials can absorb and disperse these stresses through their own good toughness, reduce the tendency of the weld to crack during the cooling process, and improve the crack resistance of the entire welded structure.

[0090] Tough welding materials usually contain specific alloy elements. During the welding process, these elements will be integrated into the weld metal, which helps to improve the microstructure of the weld, making it more uniform and dense, thereby improving the overall performance of the weld. A base layer with good toughness can provide a stable and reliable foundation for subsequent welding layers, making the combination between the layers more compact during the subsequent welding process, and the overall welding quality is easier to ensure.

[0091] The cover layer is welded with welding materials with good impact and wear resistance (such as D707 welding rod) to ensure that the weld surface has sufficient hardness to withstand external impact. Impact-resistant welding materials can also be other welding materials.

[0092] Since the cover layer is the last layer of the welded structure, its quality is directly related to the safety and reliability of the entire structure. The cover layer is directly exposed to the external environment and needs to withstand various possible impact loads. The use of impact-resistant welding materials can make the weld surface have sufficient strength and toughness. When impacted, it can effectively absorb and buffer the impact energy, prevent cracking and peeling on the weld surface, and thus protect the integrity of the entire welded structure. The use of impact-resistant welding materials can ensure that the cover layer can maintain good performance under various working conditions, thereby improving the safety of the entire welded structure during use and reducing the risk of safety accidents caused by weld failure.

[0093] For example, see Figure 5 , the opening structure 120 is welded to form a sealing portion, which includes a first base layer 141 and a first cover layer 142 .

[0094] For example, see Figure 7 , the via hole 130 is welded to form a via hole sealing portion 150 , and the via hole sealing portion 150 includes a second base layer 151 and a second cover layer 152 .

[0095] In the embodiment of the present application, the first base layer 141 and the second base layer 151 may adopt the above-mentioned stainless steel welding material with good toughness. The stainless steel welding materials used for the first base layer 141 and the second base layer 151 may be the same or different.

[0096] In the embodiment of the present application, the first cover layer 142 and the second cover layer 152 may adopt the above-mentioned welding materials with good impact and wear resistance. The welding materials used for the first cover layer 142 and the second cover layer 152 may be the same or different.

[0097] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for preparing an impact-resistant sheath, characterized in that: include: Rolling a metal material into a round shape to prepare a tubular structure, the tubular structure comprising a housing cavity formed by enclosing and an opening structure communicating with the housing cavity, the housing cavity and the opening structure both penetrate the sheath along the axial direction of the tubular structure, and the opening structure communicates with the housing cavity along the radial direction of the tubular structure; At least one through hole is formed on the tubular structure along its radial direction to obtain an impact-resistant sheath.

2. The method for preparing the impact-resistant sheath according to claim 1, characterized in that: The step of preparing the tubular structure also includes: A first inclined surface and a second inclined surface are formed on the circumference of the tubular structure, wherein the first inclined surface and the second inclined surface are respectively arranged opposite to each other on the circumference of the tubular structure, the first inclined surface has a first contact end in contact with the accommodating cavity, and the second inclined surface has a second contact end in contact with the accommodating cavity; The first inclined surface and the second inclined surface are in a V-shaped structure, and the first contact end is spaced apart from the second contact end by a preset distance to form the opening structure.

3. The method for preparing the impact-resistant sheath according to claim 2, characterized in that: The preset distance d is in the range of 1 mm to 30 mm.

4. The method for preparing the impact-resistant sheath according to claim 2, characterized in that: The value range of the included angle α between the first inclined surface and the second inclined surface is 50° to 70°.

5. The method for preparing the impact-resistant sheath according to claim 2, characterized in that: The preparation method further comprises: The rolled tubular structure is butt-welded to seal the opening structure to form a closed casing.

6. An impact-resistant sheath prepared by the preparation method according to any one of claims 1 to 5, characterized in that: The impact-resistant sheath comprises a tubular structure, the tubular structure encloses a receiving cavity and has an opening structure communicating with the receiving cavity, the receiving cavity and the opening structure both penetrate the sheath along the axial direction of the tubular structure, and the opening structure communicates with the receiving cavity along the radial direction of the tubular structure; The tubular structure is provided with at least one through hole along its radial direction.

7. The impact-resistant sheath according to claim 6, characterized in that: The impact-resistant sheath further comprises a sealing portion, and the sealing portion covers the opening structure to form the accommodating cavity.

8. The impact-resistant sheath according to claim 6, characterized in that: The impact-resistant sheath further comprises a welding rod, and the welding rod cooperates with the through hole to perform positioning.

9. An application method of an impact-resistant sheath, wherein the impact-resistant sheath is prepared by the preparation method according to any one of claims 1 to 5, characterized in that: The steps include: The impact-resistant sheath is sheathed on the outer wall of the pipeline substrate, wherein the inner diameter of the impact-resistant sheath matches the outer diameter of the pipeline substrate; Welding the opening structure to form a sealing portion; The through holes are welded to connect the outer wall of the pipeline matrix with the impact-resistant sheath.

10. The method for applying the impact-resistant sheath according to claim 9, characterized in that: Soldering the opening structure and / or soldering the via hole includes: Base welding: Use tough welding materials for welding to improve toughness; Cover layer welding: impact-resistant welding materials are used for welding to improve impact resistance. The cover layer is located on the side of the base layer facing away from the pipeline substrate.

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