Jacket node lightweight anti-fatigue structure with honeycomb cavity

Abstract

The utility model discloses a jacket node lightweight anti-fatigue structure with a honeycomb type cavity, which comprises a support frame and a reinforcing structure, the honeycomb type cavity is arranged in the support frame, and gradient phase change materials are filled in the honeycomb type cavity; the reinforcing structure comprises a jacket sleeve and a supporting frame sleeve. The jacket sleeve is a cylinder which is mainly formed by connecting two arc-shaped sleeve plates I and an arc-shaped sleeve plate II through a screw rod and is provided with an upper opening and a lower opening; the number of the supporting frame sleeves is two, and each supporting frame sleeve is sleeved with one supporting frame. And each set of support frame sleeve is a cylinder which is formed by connecting a semicircular sleeve I and a semicircular sleeve II through a screw rod and is provided with openings at two ends. Wherein the supporting frame can play a role in supporting the guide pipe frame, and the risk of fatigue damage can be reduced through the honeycomb type cavity; and the filled gradient phase change material can keep the temperature of the support frame stable. The jacket sleeve and the supporting frame sleeve can provide additional supporting, and the stability of the connecting joint is further improved.

Description

Technical Field

[0001] This utility model belongs to the field of duct stent technology, and in particular relates to a lightweight and fatigue-resistant structure for duct stent nodes with honeycomb cavities. Background Technology

[0002] A jacket structure is a widely used support structure in marine engineering, civil engineering, and industrial equipment. It is typically formed by welding steel pipes or steel components to create a stable spatial frame. The main function of a jacket structure is to provide support and stability for the superstructure (such as offshore platforms, wind turbines, bridges, etc.). Jacket joints are components responsible for connecting columns, horizontal struts, and diagonal struts to transfer loads and ensure the stability and strength of the overall structure.

[0003] During service, jacket structures are subjected to complex dynamic loads, such as wind, waves, tides, and earthquakes. These loads can cause alternating stress in the joint areas, leading to fatigue damage. If the fatigue resistance of the connection joints is insufficient, cracks may form.

[0004] Existing jacket structure joints typically have a fatigue life of less than 20 years under dynamic loads (refer to the "Code for Fatigue Design of Marine Engineering Structures"). Furthermore, traditional filling materials (such as aluminum foam) have poor temperature adaptability, resulting in a crack propagation rate in the joint area as high as 0.5 mm / thousand cycles (refer to the "Test Methods for Fatigue of Marine Engineering Structures" GB / T 34556-2017), which seriously threatens the structural safety. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a lightweight and fatigue-resistant structure for catheter rack nodes with honeycomb cavities that has a reasonable design and excellent performance.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A lightweight, fatigue-resistant structure for a guide frame node with honeycomb cavities includes a support frame and a reinforcement structure. The support frame has honeycomb cavities filled with a gradient phase change material. The reinforcement structure includes a guide frame sleeve and a support frame sleeve. The guide frame sleeve is mainly composed of two arc-shaped sleeve plates (first and second) connected by screws, forming an open-top and bottom cylindrical tube. Both arc-shaped sleeve plates (first and second) are arc-shaped plates, and the two arc-shaped sleeve plates (first) are axially symmetrical about the central axis of the cylindrical tube. There are two sets of support frame sleeves, each supporting... Each support sleeve is fitted with a support frame, and the two sets of support sleeves are connected to the guide frame sleeve in a V-shape. Each set of support sleeves is mainly composed of a semi-circular sleeve 1 and a semi-circular sleeve 2 connected by a screw, forming a cylindrical tube with open ends. One end of the cylindrical tube faces outward, and the other end is connected to the guide frame sleeve. The two semi-circular sleeves 2 in the two sets of support sleeves are symmetrically arranged on both sides of the arc-shaped sleeve 2 and integrally formed with it. The two semi-circular sleeves 1 are respectively arranged on the side where the corresponding arc-shaped sleeve 1 and arc-shaped sleeve 2 are connected and integrally formed with it.

[0008] The upper and lower ends of the inner cavity of the jacket sleeve are respectively provided with annular grooves, which are connected to a limiting structure installed on the outer surface of the jacket.

[0009] The limiting structure is a positioning block, which is movably installed inside the annular groove, which is opened inside the arc-shaped sleeve plate one and the arc-shaped sleeve plate two.

[0010] The interior of the arc-shaped sleeve plate one has a connecting groove that connects the upper and lower annular grooves. A grouting pipe is installed on one side of the top of the arc-shaped sleeve plate two. The grouting pipe is connected to the upper annular groove. The interior of the positioning block has a connecting hole that connects to the annular groove.

[0011] A supporting diagonal rod is installed to connect the semicircular sleeve one to the corresponding arc-shaped sleeve one, and a supporting diagonal rod is installed to connect the semicircular sleeve two to the corresponding arc-shaped sleeve two.

[0012] Both the first and second semicircular sleeves have positioning grooves inside, and positioning blocks are movably installed in the positioning grooves. The positioning blocks are welded to the surface of the support frame.

[0013] To address the problem of fatigue damage in current duct stents, the inventors designed a lightweight, fatigue-resistant structure for duct stent nodes with a honeycomb cavity. This structure includes a support frame and a reinforcement structure. The support frame has a honeycomb cavity filled with a gradient phase change material. The reinforcement structure includes a duct stent sleeve and a support frame sleeve. The duct stent sleeve is primarily a cylindrical tube with open top and bottom, formed by two arc-shaped sleeve plates (one and one) connected by screws. There are two sets of support frame sleeves, each set housing one support frame. Each support frame sleeve is primarily a cylindrical tube with open ends, formed by two semi-circular sleeves (one and two) connected by screws.

[0014] The support frame provides support for the guide frame. The honeycomb cavity inside can effectively absorb and disperse energy when subjected to impact, improving the impact resistance of the support frame, thereby reducing the generation and propagation of fatigue cracks and lowering the risk of fatigue damage. Moreover, the gradient phase change material filled in the support frame can undergo phase change within a specific temperature range. In the high temperature of summer, the phase change material absorbs heat and undergoes phase change to prevent the support frame temperature from becoming too high. In the low temperature of winter, the phase change material releases the stored heat, thereby maintaining the temperature stability of the support frame.

[0015] By installing jacket sleeves on the outside of the jacket and support frame respectively, additional support can be provided for the connection between the jacket and support frame, further improving the stability of the connection node. In addition, the support diagonal rod can be used to form a triangular support structure with the support frame and jacket, improving the compressive and bending resistance of the support rod. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the lightweight and fatigue-resistant structure of the catheter rack node with honeycomb cavity provided by this utility model.

[0017] Figure 2 This is a cross-sectional schematic diagram of the support frame in the lightweight and fatigue-resistant structure of the guide frame node with honeycomb cavity of this utility model.

[0018] Figure 3 This is a schematic diagram of the arc-shaped sleeve plate in the lightweight and fatigue-resistant structure of the guide frame node with honeycomb cavity of this utility model.

[0019] Figure 4 This is an exploded structural diagram of the arc-shaped sleeve plate in the lightweight fatigue-resistant structure of the guide frame node with honeycomb cavity of this utility model.

[0020] Figure 5 This is a cross-sectional view of the positioning block in the lightweight, fatigue-resistant structure of the catheter rack node with a honeycomb cavity of this utility model.

[0021] In the diagram: 100, guide frame; 101, support frame; 102, honeycomb cavity; 200, arc-shaped sleeve one; 201, arc-shaped sleeve two; 202, semi-circular sleeve one; 203, semi-circular sleeve two; 204, screw; 205, positioning groove; 206, positioning block; 207, support diagonal rod; 300, annular groove; 301, positioning block; 302, connecting groove; 303, grouting pipe; 304, connecting hole. Detailed Implementation

[0022] I. Basic Structure

[0023] like Figures 1 to 5As shown, the present invention discloses a lightweight fatigue-resistant structure for a guide frame node with a honeycomb cavity, comprising a support frame and a reinforcement structure. The support frame has a honeycomb cavity 102 (a lightweight functional cavity with a hexagonal unit as its basic topology; similar honeycomb structures have been applied to the Boeing 787 wing fuel tank (US20150246737A1, published 2015-09-10) and the wind turbine tower damping layer (CN110685848A, published 2020-01-14). The honeycomb cavity is filled with a gradient phase change material (e.g., alkane paraffin, composed of a C18-C24 straight-chain alkane mixture (mass ratio 3:7), with a phase change temperature gradient of -10℃ to 50℃; achieved through 3D printing technology with a gradient distribution of 60% low-temperature material on the outer layer and 40% high-temperature material on the inner layer along the depth direction of the honeycomb cavity, to match the stress distribution differences caused by temperature variations at different water depths). The reinforcement structure includes the jacket sleeve and the support frame sleeve. Among them,

[0024] The jacket sleeve (made of Q355D steel) is mainly composed of two arc-shaped sleeve plates 1 200 and one arc-shaped sleeve plate 201 connected by a screw 204, forming an open cylindrical tube. Both arc-shaped sleeve plates 1 and 2 are arc-shaped plates, and the two arc-shaped sleeve plates 1 are axially symmetrical about the central axis of the cylindrical tube. The upper and lower ends of the jacket sleeve are respectively provided with annular grooves 300, which are formed inside the arc-shaped sleeve plates 1 and 2. Limiting structures, such as positioning blocks 301, are provided on the outer surface of the jacket, and the positioning blocks are movably installed inside the annular grooves. The interior of arc-shaped sleeve plate 1 has a connecting groove 302 that connects the upper and lower annular grooves. A grouting pipe 303 is installed on one side of the top of arc-shaped sleeve plate 2, and the grouting pipe is connected to the upper annular groove. The interior of the positioning blocks has a connecting hole 304 that connects to the annular groove.

[0025] There are two sets of support frame sleeves (made of FH690 marine steel), each set of which houses one support frame. The two sets of support frame sleeves are connected to the guide frame sleeve in a V-shape. Each set of support frame sleeves is mainly composed of a semi-circular sleeve 1 202 and a semi-circular sleeve 203 connected by a screw, forming a cylindrical tube with open ends. One end of the cylindrical tube faces outward, and the other end connects to the guide frame sleeve. The two semi-circular sleeves 2 are symmetrically arranged on both sides of the arc-shaped sleeve 2 and integrally formed with it. The two semi-circular sleeves 1 are respectively arranged on the side where the corresponding arc-shaped sleeve 1 connects to the arc-shaped sleeve 2 and integrally formed with it. A support diagonal rod 207 is installed between the semi-circular sleeve 1 and the corresponding arc-shaped sleeve 1, and a support diagonal rod is installed between the semi-circular sleeve 2 and the corresponding arc-shaped sleeve 2. Several positioning grooves 205 are opened inside the semi-circular sleeve 1 and semi-circular sleeve 2, and positioning blocks 206 are movably installed in the positioning grooves. The positioning blocks are welded to the surface of the support frame.

[0026] II. Working Principle

[0027] The jacket 100 is equipped with several support frames 101, and the support frames are equipped with reinforcing structures connected to the jacket. The support frames provide support for the jacket and have honeycomb cavities inside. The honeycomb structure can effectively absorb and disperse energy when subjected to impact, improving the impact resistance of the support frame. The gradient phase change material filled in the support frames can undergo phase change within a specific temperature range, such as from solid to liquid or from liquid to solid, to adapt to different working environments and requirements.

[0028] After welding the support frame together, place the second arc-shaped sleeve and the two arc-shaped sleeves onto the guide frame. Simultaneously, place the corresponding semi-circular sleeves one and two onto the support frame. Then, tighten the connecting bolts to secure the connection (using M30×150mm 10.9 grade high-strength hexagonal bolts, with a pre-tightening torque set at 800N·m±5%, and anaerobic adhesive for anti-loosening treatment), forming the guide frame sleeve and the support frame sleeve (e.g., Figure 3 During installation, the first and second arc-shaped sleeves can be fitted onto the positioning blocks via annular grooves. The engagement of the annular grooves with the positioning blocks prevents the arc-shaped sleeves from sliding or loosening on the guide frame. After fixing the positions of the guide frame sleeves and support frame sleeves on the guide frame and support frame, the first and second arc-shaped sleeves, and the first and second semi-circular sleeves are welded in place. Subsequently, the positioning blocks are inserted into the corresponding positioning grooves and welded to the surface of the support frame to further reinforce the support frame and improve the stability of the connection between the support frame and the guide frame. In addition, the support diagonal braces provide extra support for the first and second semi-circular sleeves and the support frame.

[0029] After the guide frame sleeve and support frame sleeve are fixed, grout (concrete grout or high-strength grout, etc.) can be poured into the grouting pipe. The grout will enter the upper annular groove through the grouting pipe, pass through the connecting hole on the positioning block and enter the connecting groove, and then enter the lower annular groove through the connecting groove. After the grout solidifies, it can play a bonding role, so that the guide frame and the guide frame sleeve are firmly connected together.

Claims

1. A lightweight, fatigue-resistant structure for a catheter rack node with a honeycomb cavity, comprising a support frame and a reinforcing structure, characterized in that: The support frame has a honeycomb cavity inside, filled with a gradient phase change material. The reinforcement structure includes a guide frame sleeve and a support frame sleeve. The guide frame sleeve is mainly a cylindrical tube with open top and bottom, formed by connecting two arc-shaped sleeve plates and one arc-shaped sleeve plate 2 with screws. Both arc-shaped sleeve plates 1 and 2 are arc-shaped plates, and the two arc-shaped sleeve plates 1 are axially symmetrical about the central axis of the cylindrical tube. There are two sets of support frame sleeves, each set of support frame sleeves respectively fitting a support frame, and the two sets of support frame sleeves are connected to the guide frame sleeve in a V-shape. Each set of support frame sleeves is mainly a cylindrical tube with open ends, formed by connecting two semi-circular sleeves 1 and 2 with screws. One end of the cylindrical tube opens outward, and the other end opens to connect to the guide frame sleeve. The two semi-circular sleeves 2 in the two sets of support frame sleeves are symmetrically arranged on both sides of the arc-shaped sleeve 2 and integrally formed with it. The two semi-circular sleeves 1 are respectively arranged on the side where the corresponding arc-shaped sleeve 1 and arc-shaped sleeve 2 are connected and integrally formed with it.

2. The lightweight, fatigue-resistant structure for jacket nodes according to claim 1, characterized in that: The upper and lower ends of the inner cavity of the guide frame sleeve are respectively provided with annular grooves, and the annular grooves are connected to the limiting structure installed on the outer surface of the guide frame.

3. The lightweight, fatigue-resistant structure for jacket nodes according to claim 2, characterized in that: The limiting structure is a positioning block, which is movably installed inside the annular groove, which is formed inside the arc-shaped sleeve plate one and the arc-shaped sleeve plate two.

4. The lightweight, fatigue-resistant structure for jacket nodes according to claim 1, characterized in that: The arc-shaped sleeve plate one has a connecting groove inside that connects the upper and lower annular grooves. A grouting pipe is installed on one side of the top of the arc-shaped sleeve plate two. The grouting pipe is connected to the upper annular groove. The positioning block has a connecting hole inside that connects to the annular groove.

5. The lightweight, fatigue-resistant structure for jacket nodes according to claim 1, characterized in that: A supporting diagonal rod is provided to connect the first semicircular sleeve and the first corresponding arc-shaped sleeve, and a supporting diagonal rod is provided to connect the second semicircular sleeve and the second corresponding arc-shaped sleeve.

6. The lightweight, fatigue-resistant structure for jacket nodes according to claim 5, characterized in that: Both the first and second semicircular sleeves have positioning grooves inside, and positioning blocks are movably installed in the positioning grooves. The positioning blocks are welded to the surface of the support frame.

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