Cantilever prestressed wire winding superhigh pressure cylinder
By using a prestressed steel wire winding design for ultra-high pressure cylinders, the problems of deformation and sealing failure of ultra-high pressure cylinders under high internal pressure are solved, achieving the manufacturing of ultra-high pressure cylinders with high strength, low cost and high sealing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUZHOU YONGQINGHUA INTELLIGENT MANUFACTURING CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-14
AI Technical Summary
Existing ultra-high pressure cylinders are prone to deformation under high internal pressure, leading to sealing failure and leakage, and are also costly to manufacture.
The ultra-high pressure cylinder is made of prestressed steel wire wound in a cladding manner. Through the design of the core cylinder and the prestressed steel wire winding layer, radial compressive prestress is provided to balance the internal pressure. Combined with the separate structure of the inner and outer core cylinders and the selection of materials, the material cost is reduced.
It improves the strength and sealing of the ultra-high pressure cylinder, prevents deformation and leakage, reduces material costs, and simplifies the manufacturing process.
Smart Images
Figure CN122377906A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-pressure cylinder manufacturing technology, and particularly to a prestressed steel wire wound ultra-high-pressure cylinder with a retaining structure. Background Technology
[0002] Ultra-high pressure cylinders, which need to withstand high internal pressure, exist in fields such as isostatic pressing, metal extrusion cylinders, and metal extrusion dies. The contents of these ultra-high pressure cylinders can be fluids, or metals or non-metals with plastic flow properties, or extremely fine flowable sand particles. These contents exert an internal pressure p on the ultra-high pressure cylinder. i With pressures ranging from 300 MPa to 600 MPa, these ultra-high pressure cylinders are currently made of high-strength materials in one piece. This type of ultra-high pressure cylinder has high manufacturing costs and is prone to deformation, which can lead to sealing failure and leakage. Summary of the Invention
[0003] To overcome the above deficiencies, the present invention provides a prestressed steel wire wound ultra-high pressure cylinder with a clamping mechanism. This prestressed steel wire wound ultra-high pressure cylinder has high strength, is not easily deformed during long-term use, ensures sealing, prevents leakage of contents, and can effectively save material costs.
[0004] The technical solution adopted by this invention to solve its technical problem is: a prestressed steel wire wound ultra-high pressure cylinder, comprising a core cylinder, an integral flange, and a prestressed steel wire wound layer. The core cylinder comprises at least one cylinder structure, and two or more cylinder structures are tightly fitted together from the inside out. Each cylinder structure is an integrally formed cylinder structure or a combined cylinder structure formed by sequentially joining and splicing multiple long strip-shaped cut bodies along the circumference of the cylinder. The integral flange is fixedly installed at both ends of the core cylinder in the axial direction. An annular steel wire wound groove is formed between the opposite sidewalls of the two integral flanges and the outer circumference of the core cylinder. The pre-tensioned steel wire is tightly wound on the outer circumference of the core cylinder and completely contained in the steel wire wound groove to form a prestressed steel wire wound layer. The radial compressive prestress provided by the prestressed steel wire wound layer to the core cylinder can balance the normal pressure generated by the contents inside the cylinder.
[0005] As a further improvement to the invention, the core cylinder is a single-layer cylindrical structure, which is formed by sequentially splicing together multiple long strip-shaped cut bodies along the circumference of the cylinder.
[0006] As a further improvement to the invention, the core cylinder is a double-layer cylinder structure, including an inner core cylinder and an outer core cylinder. The inner core cylinder is an integrally formed cylinder structure, and the outer core cylinder is a combined cylinder structure formed by sequentially splicing multiple long strip-shaped cut bodies along the circumference of the cylinder. The outer core cylinder covers the outer circumference of the inner core cylinder, and a prestressed steel wire winding layer is wound around the outer side of the outer core cylinder.
[0007] As a further improvement of the invention, the core cylinder is a double-layer cylinder structure, including an inner core cylinder and an outer core cylinder. Both the inner core cylinder and the outer core cylinder are combined cylinder structures formed by sequentially arranging and splicing multiple long strip-shaped cut bodies along the circumference of the cylinder body. The splicing seams between adjacent long strip-shaped cut bodies of the outer cylinder body and the splicing seams between adjacent long strip-shaped cut bodies of the inner cylinder body are misaligned. The prestressed steel wire winding layer is wound around the outside of the outer core cylinder.
[0008] As a further improvement to the invention, the core tube is a double-layer cylindrical structure, including an inner core tube and an outer core tube. The inner core tube is a combined cylindrical structure formed by arranging and splicing multiple long strip-shaped cut bodies in sequence along the circumference of the cylinder. The outer core tube is an integrally formed cylindrical structure, which tightly covers the outer circumference of the inner core tube, and a prestressed steel wire winding layer is wound around the outer side of the outer core tube.
[0009] As a further improvement to the invention, the cross-section of the elongated cut body is a fan-shaped ring structure.
[0010] As a further improvement to the invention, the innermost cylindrical structure of the core tube is made of high-strength material, while each outer cylindrical structure is made of low-strength material.
[0011] As a further improvement to the invention, the axial length of the inner core cylinder is greater than the axial length of the outer core cylinder. The two ends of the inner core cylinder extend beyond the outer end faces of the outer core cylinder by a set length. The portions of the inner core cylinder extending beyond the outer core cylinder are fixedly inserted into the countersunk head of the central countersunk through hole of the integral flange. The two ends of the outer core cylinder are tightly clamped between the opposite end faces of the two integral flanges. Alternatively, the axial length of the inner core cylinder is equal to the axial length of the outer core cylinder. The two ends of the inner core cylinder are aligned with the two ends of the outer core cylinder. The two ends of the inner and outer core cylinders are fixedly inserted into the countersunk head of the central countersunk through hole of the integral flange. The inner side of the inner core cylinder is aligned and connected with the inner side of the through hole of the countersunk through hole structure of the integral flange.
[0012] The beneficial technical effects of this invention are as follows: This invention designs the ultra-high pressure cylinder into a split structure, with the inner cylinder contacting the piston and the contents. A prestressed steel wire winding layer is formed on the outer side by winding pre-tightened steel wire. This prestressed steel wire winding layer provides radial compressive prestress to the inner cylinder to balance the internal pressure P. i The tangential tensile stress caused by this design prevents the inner cylinder from deforming or being damaged even after long-term use, ensuring a tight seal and high safety. Furthermore, this invention designs the inner cylinder as a multi-layer structure. The inner core cylinder is integrally formed or assembled from separate parts made of high-strength materials, while the outer core cylinder is assembled from separate parts made of low-strength materials and wrapped around the outside of the inner core cylinder. Pre-tightened steel wire is wound around the outside of the outer core cylinder. This structure of the ultra-high pressure cylinder can reduce material costs and simplify its manufacturing process. Attached Figure Description
[0013] Figure 1This is a schematic diagram illustrating the structural principle of the double-layer core cylinder used in this invention;
[0014] Figure 2 When using an integrated inner core tube, Figure 1 Sectional view along the BB direction;
[0015] Figure 3 When using a hinged inner core cylinder, Figure 1 Sectional view along the BB direction;
[0016] Figure 4 for Figure 3 Enlarged view of section C;
[0017] Figure 5 This is a schematic cross-sectional view of the single-layer integrated core cylinder used in this invention;
[0018] Figure 6 This is a schematic cross-sectional view of the single-layer cladding core cylinder used in this invention;
[0019] Figure 7 This is a cross-sectional schematic diagram of the integrated inner core cylinder and the integrated outer core cylinder used in this invention;
[0020] Figure 8 This is a cross-sectional schematic diagram of the integrated inner core cylinder and the snap-fit outer core cylinder used in this invention;
[0021] Figure 9 This is a schematic cross-sectional view of the inner core cylinder and the outer core cylinder of the present invention.
[0022] Figure 10 A three-dimensional schematic diagram of a long strip-shaped cut body spliced into a core tube serving as an elastic foundation beam;
[0023] Figure 11 A three-dimensional diagram showing the stress analysis of a long strip-shaped cut body assembled into a core tube as an elastic foundation beam;
[0024] Figure 12 A three-dimensional view of a single-layer core cylinder before the pre-tightened steel wire is wound around it;
[0025] Figure 13 A three-dimensional view of the double-layer core cylinder before the pre-tightened steel wire is wrapped around it;
[0026] Figure 14 A three-dimensional view of the integral double-layer core cylinder before the pre-tightened steel wire is wrapped around it;
[0027] Figure 15 A three-dimensional view of the core cylinder after pre-tensioned steel wire has been wound around it. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0029] Example: A prestressed wire-wound ultra-high pressure cylinder includes a core cylinder 1, an integral flange 2, and a prestressed wire winding layer 3. The core cylinder 1 includes at least one cylinder structure, and two or more cylinder structures are tightly fitted together from the inside out. Each cylinder structure is an integrally formed cylinder structure or a combined cylinder structure formed by sequentially joining multiple long strip-shaped cut bodies 14 along the circumference of the cylinder. The integral flange 2 is fixedly installed at both ends of the core cylinder 1 in the axial direction. An annular wire winding groove 11 is formed between the opposite sidewalls of the two integral flanges 2 and the outer circumference of the core cylinder 1. The pre-tensioned wire is tightly wound on the outer circumference of the core cylinder 1 and completely contained in the wire winding groove 11 to form the prestressed wire winding layer 3. The radial compressive prestress provided by the prestressed wire winding layer 3 to the core cylinder 1 can balance the normal pressure generated by the contents inside the cylinder.
[0030] The inner surface of the core cylinder 1 is subjected to a normal pressure p. i , p i It can be a fluid, or a metal or non-metal with plastic flow properties, or extremely fine flowable sand particles. i The value ranges from 150 MPa to 1000 MPa. Figure 5 , Figure 6 The core cylinder 1 has only one cylindrical structure; Figure 7-9 The core cylinder 1 has a two-layer or multi-layer cylinder structure. The purpose of using a multi-layer cylinder structure for the core cylinder 1 is to save on the material cost of the cylinder. Under the action of ultra-high pressure, the tangential and radial stresses on the inner surface of the inner cylinder are the highest, but they decay very quickly. Therefore, it is not necessary to use high-grade materials for the outer cylinder structure. When the core cylinder 1 adopts a double-layer or even multi-layer cylinder structure design, the strength of the outermost material is lower. It is even possible to use cast components instead of forged components to save on material costs.
[0031] We will first discuss the radial and tangential strength and stiffness of the prestressed wire-wound ultra-high pressure cylinder. The prestressed wire winding layer 3 generates a radial compressive prestress σ on the core cylinder 1. grj The core cylinder 1 bears the radial compressive prestress σ generated by the steel wire layer. grj It is obvious that as long as σ grj If it is large enough, P can be balanced. iThe resulting tangential tensile stress has a certain safety factor. To reduce costs and simplify the process, the core cylinder 1 can be divided into several parts such as 3, 4, 5, 6, 8... etc. (e.g., Figure 6 Alternatively, the inner cylindrical structure can be a single-piece cylindrical structure, with the outer core cylinder 13 divided into several parts such as 3, 4, 5, 6, 8, etc. (e.g.) Figure 8 As long as σ grj Sufficiently strong, the cross-sectional surfaces of each layer of the core cylinder 1 can maintain adequate compressive stress, and can be considered as a single, integral structure. This increases σ. grj The method involves increasing the tension during the winding of the steel wire layer, or increasing the outer diameter of the winding layer. After the core cylinder 1 is divided into several long strip-shaped sections 14, it is pre-tightened by winding to form a load-bearing cylinder. Mechanically, this can be called a discontinuous load-bearing cylinder. When σ... grj It is large enough that its load-bearing capacity and service life are no different from those of the continuous load-bearing cylinder (one-piece molded cylinder structure) of the core cylinder 1; the axisymmetric finite element analysis results of the two cylinders are also the same, that is, the radial stress and tangential stress are also equal.
[0032] Let's further discuss the axial stress of the prestressed wire-wound ultra-high pressure cylinder. The prestressed wire-wound ultra-high pressure cylinder must withstand not only tangential and radial stresses but also axial stress. This is because the internal pressure of the cylinder is uneven. Since the wire-wound cylinder outside the sealing structures at both ends does not bear internal pressure, the radial expansion of the cylinder is uneven, thus causing axial stress in core cylinder 1. (See...) Figure 1 The inner diameter of core cylinder 1 is r. i Outer diameter r j The effective outer diameter of the cylinder is r0. The high-pressure chamber of the cylinder acts as an internal pressure p along its entire length. i The two ends of the cylinder are sealed, and this section does not bear the internal pressure p. i .
[0033] Mechanically, the section of the cylinder to the left of section AA can be considered as an expansion constraint ring of the cylinder. Therefore, the core cylinder 1 (inner and outer layers) bears axial stress, and a bending moment M and a shear force Q act on its section A (see...). Figure 10 B is a symmetrical section of the cylinder, which does not bear bending moment M and shear force Q.
[0034] For ease of analysis, we cut a core cylinder 1 separate body from the cylinder body, see... Figure 10 and Figure 11 Using two radii 0-d and 0-e with an included angle θ, and the inner diameter r0 and outer diameter r j A strip-shaped section is cut from the separated body. The left side of the strip-shaped section is section A, and the right side is section B. It is surrounded by a layer of steel wire and bears a uniformly distributed load—ultra-high pressure p. i It is externally constrained by the elasticity of the pre-tightened steel wire layer, and its sides bear symmetrical σ.gtj The compressive stress. Clearly, this strip-shaped cut can be considered a "beam": the steel wire layer serves as its elastic foundation, and the internal pressure p... i For its load, and σ gtj The force acts symmetrically on the strip-shaped cut body, therefore it does not induce bending moment or shear force. Thus, the axial stress and radial displacement of core cylinder 1 can be treated as a beam in mechanical terms. This type of beam is called an "elastic foundation beam." Using the mechanical principles of an elastic foundation beam, the axial stress and radial displacement of core cylinder 1 can be easily calculated. This analytical solution is almost identical to the solution obtained from axisymmetric finite element calculation, and the error is negligible in engineering applications. This analysis process can be seen... Figure 11 .
[0035] The displacement differential equation for the beam on an elastic foundation is shown below:
[0036] ;
[0037] In the above formula, p i For internal pressure, u is radial displacement (an important parameter in high-pressure seal design and manufacturing), z is the axial dimension, and 4Dβ is the axial dimension. 4 u is the foundation reaction force proportional to the deformation. Using the displacement differential equation of an elastic foundation beam, with the boundary conditions input, and through hyperbolic function transformation, it can be solved. Thus, its radial displacement and axial stress can be obtained. The displacement differential equation of an elastic foundation beam can be found in relevant materials and will not be discussed further in this patent description.
[0038] The above analysis demonstrates that the analysis of treating core cylinder 1 as an elastic foundation beam has a mechanical basis, and the various strip-shaped cuts of core cylinder 1 ( Figure 3 and Figure 4 ) in the strong σ grj Under compression and assembly, the resulting discontinuous cylinder has the same axial stress and radial displacement as the continuous cylinder.
[0039] The core cylinder 1 is a single-layer cylindrical structure, which is formed by sequentially joining multiple long strip-shaped cut bodies 14 along the circumference of the cylinder. The core cylinder 1 adopts a single-layer joined cylindrical structure, which is simple in structure and easy to assemble.
[0040] The core cylinder 1 has a double-layer cylindrical structure, including an inner core cylinder 12 and an outer core cylinder 13. The inner core cylinder 12 is a one-piece molded cylindrical structure, and the outer core cylinder 13 is a combined cylindrical structure formed by sequentially splicing multiple elongated cut bodies 14 along the circumference of the cylinder. The outer core cylinder 13 covers the outer circumference of the inner core cylinder 12, and a prestressed steel wire winding layer 3 is wound around the outer side of the outer core cylinder 13. The core cylinder 1 can also adopt a multi-layer cylindrical structure, such as a three-layer cylindrical structure, a four-layer cylindrical structure, etc.
[0041] like Figure 2This type of discontinuously assembled cylindrical body, capable of withstanding pressures of 300 MPa to 1000 MPa, features an inner core cylinder 12 with a one-piece molded structure and an outer core cylinder 13 with a snap-fit splicing structure. Finally, it is wound with prestressed steel wire. Its advantages lie in both the pre-tightening process and reduced manufacturing costs.
[0042] The continuous core cylinder 1 is designed as an integral inner and outer core cylinder 13, which can greatly reduce material costs (inner core cylinder 12 is made of high-strength material, outer core cylinder 13 is made of low-strength material). However, the press-fitting process is very complex, especially when its length L reaches 2-4 meters and its diameter reaches 300mm-500mm. The press-fitting process is difficult and risky because the ellipticity and taper of the inner core cylinder 12 and outer core cylinder 13 are not the same, often resulting in uneven interference fit or even press-fitting failure. Using a hot-fitting process also carries risks. By making the assembly of the outer core cylinder 13 discontinuous, this risk is completely eliminated. Moreover, with the widespread use of modern CNC precision machining, the outer core cylinder 13 can be designed as a long strip cut body, which is not expensive. Changing the outer core cylinder 13 from a "forged long cylinder" to a "forged long strip" significantly reduces costs and processing time, which is very reasonable. Furthermore, the "forged long strip" can be changed to a "cast long strip" when the strength meets the requirements.
[0043] The inner core cylinder 12 adopts an integrally molded cylinder structure, which can ensure that its inner surface is smooth and ensure the sealing between it and the sealing structure.
[0044] The core cylinder 1 is a double-layer cylinder structure, including an inner core cylinder 12 and an outer core cylinder 13. Both the inner core cylinder 12 and the outer core cylinder 13 are combined cylinder structures formed by sequentially arranging and splicing multiple long strip-shaped cut bodies 14 along the circumference of the cylinder. The splicing seams between adjacent long strip-shaped cut bodies 14 of the outer cylinder are misaligned with the splicing seams between adjacent long strip-shaped cut bodies 14 of the inner cylinder. The prestressed steel wire winding layer 3 is wound around the outside of the outer core cylinder 13.
[0045] Both the inner core cylinder 12 and the outer core cylinder 13 can be divided into several parts such as 3, 4, 5, 6, 8, etc.; for example Figure 3 This type of discontinuously assembled cylinder, which can withstand pressures of 300 MPa to 1000 MPa, uses a mortise-and-tenon joint structure for both the inner core cylinder 12 and the outer core cylinder 13. Finally, it is wound with prestressed steel wire. The staggered distribution of the joint seams of the inner core cylinder 12 and the outer core cylinder 13 can improve the bonding strength, avoid the formation of steps at the joint, and also prevent the winding steel wire from being sheared and damaged under huge pressure.
[0046] The core cylinder 1 has a double-layer cylindrical structure, including an inner core cylinder 12 and an outer core cylinder 13. The inner core cylinder 12 is a combined cylindrical structure formed by sequentially arranging and splicing multiple elongated cut bodies 14 along the circumference of the cylinder. The outer core cylinder 13 is a one-piece molded cylindrical structure, tightly covering the outer circumference of the inner core cylinder 12. A prestressed steel wire winding layer 3 is wound around the outer side of the outer core cylinder 13. The inner core cylinder 12 adopts a snap-fit splicing mechanism and is constrained by the one-piece molded outer core cylinder 13, while the outer core cylinder 13 is provided with radial compressive prestress by the prestressed steel wire winding layer 3.
[0047] The cross-section of the elongated cut body 14 is a fan-shaped ring structure, which, after being joined together, forms a complete cylindrical structure.
[0048] The innermost cylindrical structure of the core cylinder 1 is made of high-strength material, while each outer cylindrical structure is made of low-strength material, which ensures the wear resistance of the inner layer while reducing the overall material cost.
[0049] The axial length of the inner core cylinder 12 is greater than the axial length of the outer core cylinder 13. Both ends of the inner core cylinder 12 extend beyond the outer ends of the axial end faces of the outer core cylinder 13 by a set length. The portions of the inner core cylinder 12 extending beyond the ends of the outer core cylinder 13 are fixedly inserted into the countersunk head of the central countersunk through hole of the integral flange 2. The two ends of the outer core cylinder 13 are tightly clamped between the opposite end faces of the two integral flanges 2. Alternatively, the axial length of the inner core cylinder 12 is equal to the axial length of the outer core cylinder 13. The two ends of the inner core cylinder 12 are aligned with the two ends of the outer core cylinder 13. The two ends of the inner core cylinder 12 and the outer core cylinder 13 are fixedly inserted into the countersunk head of the central countersunk through hole of the integral flange 2. The inner side of the inner core cylinder 12 is aligned and connected with the inner side of the through hole of the countersunk through hole structure of the integral flange 2. The integral flange 2 is directly sleeved on the outer sides of both axial ends of the inner core cylinder 12 or the outer sides of both axial ends of the sleeve-like structure of the inner core cylinder 12 and the outer core cylinder 13. Then, the integral flange 2 is axially fixedly connected to the inner core cylinder 12 and the outer core cylinder 13 by high-strength bolts or welding. The integral flange 2 does not bear high internal pressure.
[0050] When the ultra-high pressure cylinder is in use, its two ends are sealed to form a closed cavity. For example, a left piston 4 and a right piston 5 are axially slidably inserted into the left and right ends of the inner side of the core cylinder 1. The left piston 4 and the right piston 5 each include a piston body 41 or a sealing ring 42. The left piston 4 and the right piston 5 have a sealing ring 42 receiving groove at the end facing the center of the cylinder. The sealing ring 42 is fixed in the sealing ring 42 receiving groove and makes dynamic sealing contact with the inner wall of the core cylinder 1. The two ends of the core cylinder 1 are sealed by the left piston 4 and the right piston 5. The left piston 4 and the right piston 5 can also slide inside the core cylinder 1 to drive the material inside the core cylinder 1 to move left and right to meet various production needs.
Claims
1. A prestressed steel wire wound ultra-high pressure cylinder with a clamping mechanism, characterized in that: The core includes a core cylinder (1), an integral flange (2), and a prestressed steel wire winding layer (3). The core cylinder includes at least one cylindrical structure. Two or more cylindrical structures are tightly fitted together from the inside out. Each cylindrical structure is an integrally formed cylindrical structure or a combined cylindrical structure formed by sequentially splicing multiple long strip-shaped cut bodies (14) along the circumferential direction of the cylindrical body. The integral flange is fixedly installed at both ends of the core cylinder. An annular steel wire winding groove (11) is formed between the opposite side walls of the two integral flanges and the outer circumferential side of the core cylinder. The pre-tightened steel wire is tightly wound on the outer circumferential surface of the core cylinder and is completely contained in the steel wire winding groove to form a prestressed steel wire winding layer. The radial compressive prestress provided by the prestressed steel wire winding layer to the core cylinder can balance the normal pressure generated by the contents inside the cylinder.
2. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 1, characterized in that: The core cylinder is a single-layer cylindrical structure, which is formed by sequentially splicing together multiple long strip-shaped cut bodies along the circumference of the cylinder.
3. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 1, characterized in that: The core tube is a double-layer cylindrical structure, including an inner core tube (12) and an outer core tube (13). The inner core tube is an integrally formed cylindrical structure, and the outer core tube is a combined cylindrical structure formed by sequentially splicing multiple long strip-shaped cut bodies along the circumference of the cylinder. The outer core tube covers the outer circumference of the inner core tube, and the prestressed steel wire winding layer is wound around the outer side of the outer core tube.
4. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 1, characterized in that: The core cylinder is a double-layer cylinder structure, including an inner core cylinder (12) and an outer core cylinder (13). Both the inner and outer core cylinders are combined cylinder structures formed by sequentially arranging and splicing multiple long strip-shaped cut bodies along the circumference of the cylinder. The splicing seams between adjacent long strip-shaped cut bodies of the outer cylinder and the splicing seams between adjacent long strip-shaped cut bodies of the inner cylinder are misaligned. The prestressed steel wire winding layer is wrapped around the outside of the outer core cylinder.
5. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 1, characterized in that: The core tube is a double-layer cylindrical structure, including an inner core tube (12) and an outer core tube (13). The inner core tube is a combined cylindrical structure composed of multiple long strip-shaped cut bodies arranged and spliced in sequence along the circumference of the cylinder. The outer core tube is an integrally formed cylindrical structure. The outer core tube tightly covers the outer circumference of the inner core tube, and the prestressed steel wire winding layer is wound around the outer side of the outer core tube.
6. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 1, characterized in that: The cross-section of the elongated cut body is a fan-shaped ring structure.
7. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 1, characterized in that: The innermost cylindrical structure of the core tube is made of high-strength material, while each outer cylindrical structure is made of low-strength material.
8. The prestressed steel wire wound ultra-high pressure cylinder as described in claim 2, characterized in that: The axial length of the inner core tube is greater than that of the outer core tube. Both ends of the inner core tube extend a predetermined length beyond the outer end faces of the outer core tube. The portions of the inner core tube extending beyond the outer core tube are fixedly inserted into the countersunk head of the central countersunk through hole of the integral flange. The two ends of the outer core tube are tightly clamped between the opposite end faces of the two integral flanges. Alternatively, the axial length of the inner core tube is equal to that of the outer core tube, and the two ends of the inner core tube are aligned with the two ends of the outer core tube. Both ends of the inner and outer core tubes are fixedly inserted into the countersunk head of the central countersunk through hole of the integral flange. The inner side of the inner core tube is aligned and connected with the inner side of the through hole of the countersunk through hole structure of the integral flange.