Asphalt boat stress expansion joint elimination

Abstract

This utility model discloses a stress-relieving expansion joint for asphalt boats, specifically relating to the field of shipbuilding technology. It includes two connecting discs, with an expansion joint body positioned opposite each disc. The expansion joint body has an internal metal layer. Positioning blocks are welded to the edges of the connecting discs, symmetrically distributed at both ends to ensure installation accuracy. Support plates are fixed around the connecting pipe, located in the middle section, providing additional stability to the entire structure. Holes are pre-drilled in the positioning blocks and support plates for laterally inserting threaded rods. The addition of threaded rods not only further strengthens the connection between the connecting discs, expansion joint body, and connecting pipe but also makes installation and disassembly of the entire device more convenient, greatly improving work efficiency. This design ensures both structural stability and ease of operation.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, and more specifically, to stress-relieving expansion joints for asphalt boats. Background Technology

[0002] In the piping system of asphalt tankers, the pipes will expand and contract due to factors such as temperature changes, medium flow, and vibration of the ship itself. This not only affects the stability of the piping system, but may also cause stress concentration on the ship structure, shortening the service life of the pipes and connecting components.

[0003] A search revealed a patent publication number, CN205001743U, which discloses a stress corrosion resistant expansion joint. This corrugated pipe expansion joint is composed of an integrally formed corrugated pipe with longitudinal welds welded using an integral forming process. The pipe wall is formed by integrally processing three layers of stainless steel. The three layers of stainless steel are: an outer layer of ferritic stainless steel, a middle layer of 316L stainless steel, and an inner layer of 304 stainless steel. This expansion joint only has longitudinal welds, exhibits better corrosion resistance than ordinary corrugated pipe expansion joints, has high efficiency, long service life, and is suitable for widespread application.

[0004] Traditional expansion joints are not effective at dispersing stress and may not be able to fully absorb and disperse the stress generated by pipeline deformation. This may lead to stress concentration, which may accelerate fatigue damage to pipeline materials under long-term action, affecting the overall lifespan and reliability of the pipeline system.

[0005] Therefore, a method to eliminate stress expansion joints in asphalt boats is proposed to address the above-mentioned problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an asphalt boat stress-relief expansion joint to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an asphalt boat stress-relieving expansion joint, comprising two connecting discs, an expansion joint body disposed on the opposite side of the connecting discs, a metal layer disposed inside the expansion joint body, a connecting pipe fixedly installed in the middle position of the expansion joint body, a positioning block fixedly connected to the edge of the connecting discs, the positioning blocks at both ends of the connecting discs being disposed in the same position, a support plate fixedly installed on the connecting pipe, the support plate being located in the middle region of the connecting pipe, and a threaded rod inserted laterally into the positioning block and the support plate.

[0008] Preferably, both the positioning block and the support plate have through holes inside, and the threaded rod passes through the through holes inside the positioning block and the support plate.

[0009] Preferably, nuts are threaded onto both ends of the threaded rod, and a buffer structure is provided on the side of the nut near the connecting disc, and the washer is integrally formed with the nut.

[0010] Preferably, the upper side of the connecting plate is provided with positioning holes, and the distance between the positioning holes is set at equal intervals.

[0011] Preferably, the metal layer includes a stainless steel layer, a carbon steel layer, and an alloy layer, with a carbon steel layer sleeved on the outside of the stainless steel layer and an alloy layer sleeved on the outside of the carbon steel layer, and the layers are joined together by hot rolling.

[0012] Preferably, the ratio of the diameter of the threaded rod to the corrugation valley diameter is 1:3.5-4.2, and the applied preload ranges from 200 to 350 N·m. The corrugation height of the expansion joint body is 12-18 mm, the radius of curvature of the valley is 0.8-1.2 times the corrugation height, and the wave crest spacing is 50-70 mm.

[0013] Preferably, the buffer structure adopts a disc spring assembly, which is composed of 3-5 SUS304 stainless steel disc springs stacked together, with a single piece thickness of 0.8-1.2mm.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] Compared to existing technologies, this asphalt boat stress-relief expansion joint uses a connecting disc as its core component. There are two discs arranged opposite each other, with the expansion joint body positioned in the middle. An embedded metal layer within the expansion joint body not only enhances the overall structural strength but also endows the expansion joint with excellent high-temperature and corrosion resistance. At the center of the expansion joint body, a connecting pipe is securely installed, serving as a crucial path for fluid transport and playing a vital role.

[0016] Compared to existing technologies, this asphalt boat stress-relief expansion joint features symmetrically distributed positioning blocks welded to the edges of the connecting disc. These positioning blocks, symmetrically positioned at both ends, ensure installation accuracy. A support plate is fixed in the middle of the connecting pipe, adding extra stability to the overall structure. Both the positioning blocks and the support plate have pre-drilled holes for lateral insertion of threaded rods. The introduction of threaded rods not only strengthens the connection between the connecting disc, expansion joint body, and connecting pipe but also greatly facilitates the assembly and disassembly process of the entire device, significantly improving work efficiency. This design ensures both structural robustness and ease of operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a front view schematic diagram of the present utility model.

[0019] Figure 3 This is a schematic diagram of the expansion joint and metal layer of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the metal layer of this utility model.

[0021] The attached diagram is labeled as follows: 1. Connecting disc; 2. Expansion joint; 3. Connecting pipe; 4. Positioning block; 5. Support plate; 6. Threaded rod; 7. Nut; 8. Positioning hole; 9. Metal layer; 901. Stainless steel layer; 902. Carbon steel layer; 903. Alloy layer; 10. Disc spring assembly. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] As attached Figures 1 to 3 The asphalt boat stress-relieving expansion joint shown includes a connecting plate 1, of which there are two. An expansion joint body 2 is set on the opposite side of the connecting plate 1. A metal layer 9 is set inside the expansion joint body 2. A connecting pipe 3 is fixedly installed in the middle position of the expansion joint body 2. A positioning block 4 is fixedly connected to the edge of the connecting plate 1. The positioning blocks 4 at both ends of the connecting plate 1 are set in the same position. A support plate 5 is fixedly installed on the connecting pipe 3. The support plate 5 is located in the middle area of ​​the connecting pipe 3. The positioning block 4 and the support plate 5 are laterally inserted into the threaded rod 6.

[0025] Among them, there are two connecting discs 1 as key components, which stand opposite each other and have an expansion joint body 2 in the middle. The expansion joint body 2 has a metal layer 9 embedded inside, which not only enhances the structural strength, but also gives the expansion joint excellent high temperature resistance and corrosion resistance. In the center of the expansion joint body 2, the connecting pipe 3 is firmly installed, which serves as a channel for fluid transmission and carries an important function.

[0026] Positioning blocks 4 are welded to the edges of the connecting plate 1. These positioning blocks 4 are symmetrically distributed at both ends of the connecting plate 1 to ensure installation accuracy. Support plates 5 are fixed around the connecting pipe 3, located in the middle section of the connecting pipe 3, providing additional stability to the entire structure. Both the positioning blocks 4 and the support plates 5 have pre-drilled holes for the transverse insertion of threaded rods 6. The addition of threaded rods 6 not only further strengthens the connection between the connecting plate 1, the expansion joint body 2, and the connecting pipe 3, but also makes the entire device easier to install and disassemble, greatly improving work efficiency. This design ensures both structural stability and ease of operation.

[0027] Example 2

[0028] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0029] In a preferred embodiment, both the positioning block 4 and the support plate 5 have through holes inside, through which the threaded rod 6 passes. Furthermore, the positioning block 4 and the support plate 5 are meticulously designed with through holes that precisely correspond to each other, providing a channel for the threaded rod 6 to pass through. The threaded rod 6 not only smoothly passes through the through hole in the positioning block 4 but also steadily passes through the through hole in the support plate 5. Through this penetrating connection method, the three components—the connecting disc 1, the support plate 5, and the expansion joint body 2—are firmly locked together, forming a stable and reliable overall structure.

[0030] In a preferred embodiment, nuts 7 are threaded onto both ends of the threaded rod 6. A buffer structure is provided on the side of the nut 7 near the connecting plate 1, and the washer is integrally formed with the nut 7. Furthermore, after the threaded rod 6 passes through the through hole, its two ends are designed with threads to install the nut 7. When the nut 7 is tightened, it not only firmly locks the threaded rod 6 to prevent it from loosening, but also fixes the washer to the side near the connecting plate 1. The washer and the nut 7 adopt an integrated design, which not only enhances the tightening effect of the nut 7, but also avoids the risk of the washer falling off, further improving the stability and safety of the entire connection structure.

[0031] As a preferred embodiment, the upper side of the connecting plate 1 is provided with positioning holes 8, and the distance between the positioning holes 8 is set at equal intervals; furthermore, a number of positioning holes 8 are provided on the upper surface of the connecting plate 1, and the distance between them is set at equal intervals, which not only facilitates positioning during installation, but also ensures the uniformity and stability of the connection between the connecting plate 1 and other components, greatly improving the assembly accuracy and operational reliability of the entire device.

[0032] In a preferred embodiment, the metal layer 9 comprises a stainless steel layer 901, a carbon steel layer 902, and an alloy layer 903. The carbon steel layer 902 is sleeved on the outside of the stainless steel layer 901, and the alloy layer 903 is sleeved on the outside of the carbon steel layer 902. Furthermore, the metal layer 9 has a very complex and intricate structure, consisting of three layers: the stainless steel layer 901, the carbon steel layer 902, and the alloy layer 903. These layers are joined together by hot rolling. The stainless steel layer 901, due to its excellent corrosion resistance and oxidation resistance, is placed on the innermost side. The outermost layer tightly wraps around the carbon steel layer 902 to enhance the overall strength and hardness. The outermost layer is the alloy layer 903. It gives the metal layer 9 better wear resistance and high temperature resistance. This three-layer design makes the expansion joint body 2 more durable and reliable. The ratio of the diameter of the threaded rod 6 to the corrugation valley diameter is 1:3.5-4.2, and the applied preload range is 200-350 N·m. The corrugation height of the expansion joint body 2 is 12-18 mm, the radius of curvature of the valley is 0.8-1.2 times the corrugation height, and the peak spacing is 50-70 mm. A disc spring assembly 10 is provided between the nut 7 and the washer. The disc spring assembly 10 is composed of 3-5 SUS304 stainless steel disc springs stacked together, and the thickness of a single piece is 0.8-1.2 mm.

[0033] The working process of this utility model is as follows: In use, firstly, prepare two connecting discs 1 and place them at the two ends to be connected. Install the expansion joint body 2 on the opposite side of the connecting disc 1, ensuring that the metal layer 9 (including stainless steel layer 901, carbon steel layer 902 and alloy layer 903) inside the expansion joint body 2 is intact and correctly installed. Fix the connecting pipe 3 in the middle position of the expansion joint body 2, and install the support plate 5 in the middle area of ​​the connecting pipe 3. Ensure that the positioning block 4 at the edge of the connecting disc 1 corresponds to the position of the support plate 5, and insert the threaded rod 6 horizontally into the through hole opened inside them. Thread nuts 7 are threaded on both ends of the threaded rod 6, and check whether the nut 7 is fixed with a washer on the side close to the connecting disc 1 (the washer and nut 7 are set as one piece) to ensure the fastening effect. If further positioning is required, the positioning holes 8 set at equal intervals on the upper side of the connecting disc 1 can be used for precise installation. Finally, by tightening the nut 7, the connecting disc 1, the expansion joint body 2, the connecting pipe 3 and the support plate 5 are firmly connected together to form a stable and reliable expansion joint structure.

Claims

1. Asphalt tanker stress relief expansion joint comprising a connecting disc (1), characterised in that: There are two connecting discs (1). An expansion joint body (2) is provided on the opposite side of the connecting disc (1). A metal layer (9) is provided inside the expansion joint body (2). A connecting pipe (3) is fixedly installed in the middle position of the expansion joint body (2). A positioning block (4) is fixedly connected to the edge of the connecting disc (1). The positioning blocks (4) at both ends of the connecting disc (1) are set in the same position. A support plate (5) is fixedly installed on the connecting pipe (3). The support plate (5) is located in the middle area of ​​the connecting pipe (3). The positioning block (4) and the support plate (5) are inserted laterally into the threaded rod (6).

2. A stress expansion joint for bitumen tank according to claim 1, characterized in that: Both the positioning block (4) and the support plate (5) have through holes, and the threaded rod (6) passes through the through holes in the positioning block (4) and the support plate (5).

3. The asphalt boat stress-relieving expansion joint according to claim 2, characterized in that: Nuts (7) are threaded onto both ends of the threaded rod (6). A buffer structure is provided on the side of the nut (7) near the connecting plate (1). The nut (7) and the washer are integrated.

4. The asphalt boat stress-relieving expansion joint according to claim 2, characterized in that: The upper side of the connecting plate (1) is provided with positioning holes (8), and the distance between the positioning holes (8) is set at equal intervals.

5. The asphalt boat stress-relieving expansion joint according to claim 4, characterized in that: The metal layer (9) includes a stainless steel layer (901), a carbon steel layer (902) and an alloy layer (903). The stainless steel layer (901) is covered with a carbon steel layer (902), and the carbon steel layer (902) is covered with an alloy layer (903). The layers are combined by hot rolling.

6. The asphalt boat stress-relieving expansion joint according to claim 1, characterized in that: The ratio of the diameter of the threaded rod (6) to the corrugated valley diameter is 1:3.5-4.2, and the applied preload range is 200-350 N·m. The corrugated height of the expansion joint body (2) is 12-18 mm, the radius of curvature of the valley is 0.8-1.2 times the corrugated height, and the wave crest spacing is 50-70 mm.

7. The asphalt boat stress-relieving expansion joint according to claim 3, characterized in that: The buffer structure adopts a disc spring assembly (10), which is composed of 3-5 SUS304 stainless steel disc springs stacked together, with a single piece thickness of 0.8-1.2mm.

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