Integrated water collecting pipe for racing boat and preparation method of integrated water collecting pipe

Abstract

The invention provides a preparation method of an integrated water collecting pipe for racing boats, which comprises the following steps: preparing pedal adjusting slide rails, and symmetrically mounting the pedal adjusting slide rails on two sides of an inner insert mold; pre-impregnated carbon fiber cloth is evenly laid on the surface of the inner insert mold; the water collecting pipe body and the magnet body are embedded into corresponding grooves in the insert mold; pMI foam is laid on the inner insert mold; and the insert mold laid with the foam is cured and formed, so that the water collecting pipe and the insert are integrally formed. A three-in-one integrated structure of the water collecting pipe, the inner insert and the boat body is adopted, the three parts are free of splicing gaps and later assembly traces, a complete and coherent overall stress structure is formed, the strength, rigidity and assembly precision of the water collecting pipe are improved from the structure root source, the overall hydrodynamic performance of the racing boat is optimized, and the service life of the racing boat is prolonged. And the harsh use requirements of high-end racing boats under the working conditions of high-speed running and complex water flow can be met.

Description

Technical Field

[0001] This invention relates to the field of boat manufacturing technology, and in particular to an integrated water collection pipe for racing boats and its preparation method. Background Technology

[0002] Currently, the manufacturing and assembly methods for racing boat water manifolds are relatively traditional. The core process involves pre-setting the installation position for the water manifold during the fabrication of the inner fittings (often made of carbon fiber composite materials to match the hull material). The water manifold is not pre-embedded during the process. After the inner fittings and hull are integrally formed using a molding process (autoclave curing), the separately manufactured water manifold is then assembled into the pre-set installation position using bolts, adhesives, and other methods. This traditional manufacturing and assembly method is the most common technical solution in the industry, but it suffers from numerous insurmountable technical defects due to its inherent process characteristics. These defects severely restrict the improvement of the overall performance of racing boats and cannot meet the stringent application requirements of high-end racing boats. Specific defects are as follows:

[0003] First, the water collection pipes manufactured using existing traditional processes lack sufficient strength and fatigue resistance. Because the water collection pipes are connected to the hull using a post-construction, uneven assembly gaps are inevitable, resulting in poor structural continuity at the connection points and an inability to form a unified load-bearing structure. This leads to poor force transmission within the water collection pipes. Under conditions of high-speed sailing, water flow impact, and hull vibration, the connection between the water manifold and the hull becomes a stress concentration point. Long-term exposure to cyclical water flow impact and hull vibration loads can easily lead to problems such as loosening of the connection, detachment of adhesives, loosening of bolts, and even breakage. This can result in damage and leakage of the water manifold, affecting its normal function. In severe cases, water manifold failure can cause safety hazards such as water accumulation inside the boat's cabin. Especially in high-end racing boats, such defects can directly affect the race results and even cause safety accidents. Furthermore, if the water manifold is made of metal, its weight is significant, contradicting the trend of lightweight carbon fiber racing boats. Moreover, the material difference between metal and boat materials is substantial, with different coefficients of thermal expansion. During long-term use, temperature changes can cause gaps to widen and seals to fail at the connection points, further reducing the structural strength and stability of the water manifold. If the water manifold is made of ordinary composite materials, its rigidity and resistance to water flow impact are insufficient to withstand the complex operating conditions of high-end racing boats.

[0004] Secondly, the assembly precision of water collection pipes manufactured using existing traditional processes is extremely low. On the one hand, the installation positions for water collection pipes reserved during the manufacturing process of the inserts are prone to dimensional and positional deviations due to factors such as the precision of processing equipment, molds, and operating techniques. On the other hand, the water collection pipes themselves, which are manufactured separately, also have processing errors. In addition, during the later assembly process, inconsistent positioning benchmarks and insufficient positioning precision lead to frequent problems such as axis misalignment, end face tilting, and loose or uneven connection with the hull after assembly, making it impossible to guarantee the assembly precision of the water collection pipes. The assembly precision of the water collection pipes directly affects the fluid transport efficiency. Insufficient precision will increase fluid flow resistance, reduce the boat's drainage turbulence, generate additional driving resistance, and affect the boat's speed and handling stability. This is a fatal flaw for high-end racing boats that have extremely high requirements for speed and handling precision.

[0005] Secondly, existing traditional processes suffer from low production efficiency, high production costs, and poor compatibility. In traditional processes, the water collection pipe requires separate processing, testing, and painting before final assembly. This cumbersome process not only increases the workload of processing and assembly, reducing production efficiency, but also results in a low product qualification rate due to the accumulation of errors from multiple processes. Furthermore, the final assembly process consumes a large amount of auxiliary materials such as connectors (bolts, clips, etc.) and adhesives, and requires specialized operators for precise assembly, further increasing production costs. In addition, the separately processed water collection pipe often has dimensional mismatches with the reserved installation positions of the internal components, requiring secondary processing and adjustments, resulting in poor compatibility and difficult maintenance. If the water collection pipe is damaged, the entire assembly structure needs to be disassembled, leading to low repair efficiency and high repair costs.

[0006] Finally, existing traditional water manifold structures cannot meet the development trend of lightweight and high rigidity in carbon fiber racing boats. Traditional assembled water manifolds, whether made of metal or ordinary composite materials, are relatively heavy, and the modular assembly structure adds extra connecting parts, further increasing the overall weight of the racing boat, which contradicts the core requirement of lightweight carbon fiber racing boats. At the same time, the overall rigidity of the modular assembly structure is insufficient, and it cannot form a cohesive structure with the carbon fiber hull and internal components to share the load. This makes it difficult to utilize the excellent mechanical properties of carbon fiber materials, thus limiting the improvement of the overall rigidity of the racing boat and making it unsuitable for the high-speed driving and complex operating conditions required by high-end racing boats.

[0007] In summary, the current traditional manufacturing and assembly methods for rowing water pipes have many technical defects, such as insufficient strength, low assembly precision, low production efficiency, high production cost, poor compatibility, and inability to meet the development trend of lightweight and high rigidity of carbon fiber rowing boats. They cannot meet the stringent performance requirements of high-end rowing boats (especially high-end competitive rowing boats and professional training rowing boats) for water pipes, which seriously restricts the development of the rowing industry towards high-end. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the above-mentioned technology and provide an integrated water collection pipe for racing boats and its preparation method.

[0009] Therefore, the present invention provides a method for preparing an integrated water collection pipe for racing boats, comprising the following steps:

[0010] S1. Prepare the foot pedal adjustment slide rail and install it symmetrically on both sides of the inner insert mold;

[0011] S2. Spread the prepreg carbon fiber cloth evenly on the surface of the insert mold;

[0012] S3. Embed the water collection pipe body and the magnet body into the corresponding grooves on the insert mold;

[0013] S4. Lay the PMI foam onto the insert mold;

[0014] S5. Solidify the mold of the inner insert with foam to form an integral part of the water pipe and the inner insert.

[0015] Preferably, in step S1, when preparing the foot pedal adjustment slide rail, a double-layer 0° / 90° prepreg carbon fiber cloth of 200g / m² is laid on a metal mold to form a preform, and then the preform is fixedly installed on the insert mold.

[0016] Preferably, in step S2, a double-layer 0° / 90° prepreg carbon fiber cloth of 100g / m² is laid on the insert mold, and the number of layers is not less than two.

[0017] Preferably, in step S3, before the water collection pipe body is embedded into the insert mold, an interface adhesive is applied to its outer surface with a thickness of 0.05-0.15mm, and the magnet body is embedded in the plug installation area of ​​the water collection pipe inlet. The magnet body and the insert layer are wrapped and fixed by pre-impregnated carbon fiber cloth.

[0018] Preferably, in step S4, the thickness of the PMI foam is 2-5 mm, the density is 75-110 kg / m³, and its cutting shape matches the curved surface of the inlay mold.

[0019] Preferably, in step S5, a thermostatic precipitator is used for curing and molding. The curing steps are as follows: the heating rate is 1-3℃ / min, the first curing temperature is 80-100℃, and the holding time is 30-60min; then the temperature is raised to the second curing temperature of 120-135℃, and the holding time is 90-120min; the curing pressure is 0.3-0.6MPa, and the vacuum degree is not lower than -0.095MPa. After curing, the temperature is lowered to below 60℃ at a rate not exceeding 2℃ / min before the can is opened and the mold is removed.

[0020] Preferably, the following steps are also included:

[0021] S6. Lay at least one layer of pre-impregnated carbon fiber cloth in the hull of the racing boat, and lay at least one layer of glass cloth transition layer of varying width on both sides of the bottom of the boat. The position of the transition layer corresponds to the position of the inlay. Then, place the formed inlay in the hull.

[0022] S7. Alternately lay 75g / m² prepreg carbon fiber cloth and 100g / m² prepreg carbon fiber cloth at the joint between the inner insert and the hull;

[0023] S8. Perform integrated co-curing molding on the completed ply structure.

[0024] Preferably, in step S6, the width of the upper glass cloth transition layer is greater than that of the lower glass cloth transition layer.

[0025] The present invention also provides an integrated water collection pipe for racing boats, including a water collection pipe body, wherein the water collection pipe body and an inner insert are integrally formed, the inner insert is integrally formed with the hull, and the water collection pipe body, the inner insert and the hull are all made of carbon fiber material.

[0026] Preferably, at least one magnet body is pre-embedded inside the inner insert at the water inlet end of the water collection pipe body. The magnet body is integrally formed with the water collection pipe body and the inner insert. A magnetic plug is provided at the water inlet end, and the magnetic plug is attracted to the magnet body.

[0027] The beneficial effects of the present invention are as follows: The present invention provides an integrated water collection pipe for racing boats and its preparation method, which has the following beneficial effects.

[0028] (1) Breaking away from the traditional split structure, the water collection pipe adopts a three-in-one integrated structure of "water collection pipe-inlay-hull". The water collection pipe is not an independent component, but is formed as part of the inlay during the inlay production process and then formed as a whole with the hull. There are no splicing gaps or post-assembly traces among the three, forming a complete and coherent overall load-bearing structure. This improves the strength, rigidity and assembly accuracy of the water collection pipe from the structural source and optimizes the overall hydrodynamic performance of the racing boat.

[0029] (2) Adapting to the molding characteristics of carbon fiber materials, the water collection pipe molding process is deeply integrated with the molding process of the inlay and the hull. There is no need to reserve the water collection pipe installation position or the later assembly steps. This simplifies the manufacturing process, avoids the accumulation of errors in multiple processes, ensures the connection accuracy between the water collection pipe and the hull, reduces production costs, and improves production efficiency.

[0030] (3) Relying on the integrated structural design and the excellent properties of carbon fiber materials, the water collection pipe achieves the dual advantages of "lightweight and high rigidity", solves the problems of insufficient strength, poor fatigue resistance and low assembly precision of traditional water collection pipes, improves the water collection pipe's resistance to water flow impact, sealing performance, drainage performance and structural stability, and adapts to the stringent use requirements of high-end racing boats under high-speed driving and complex water flow conditions. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the racing boat of the present invention;

[0032] Figure 2 This is a magnified view of a single-piece water collection pipe used in rowing boats;

[0033] Figure 3 This is a schematic diagram of the structure of the inlay with the foot pedal adjustment rail installed;

[0034] Figure 4 This is a schematic diagram of the groove on the inlay;

[0035] Figure 5 This is a schematic diagram of the installation of the water collection pipe body and the magnet body;

[0036] Figure 6 This is a schematic diagram of the fiberglass cloth transition layer on the hull;

[0037] Figure 7 This is a schematic diagram of the magnetic plug.

[0038] The markings in the diagram are: 1. Water collection pipe body; 2. Inlay; 3. Hull; 4. Magnetic plug; 41. Perforated grid area; 42. Solid sealing area; 5. Magnet body; 6. Groove; 7. Transition layer. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0040] Example 1:

[0041] like Figures 1 to 7 As shown, this invention provides an integrated water collection pipe for racing boats, including a water collection pipe body 1. The water collection pipe body 1 is installed on an inner insert 2 and integrally formed with the inner insert 2. The inner insert 2 and the hull 3 are integrally formed, with no splicing gaps between the three, forming a complete and continuous overall load-bearing structure. The water collection pipe body 1, the inner insert 2, and the hull 3 are all made of carbon fiber material, which is lightweight and has high rigidity, meeting the requirements of high-end racing boats.

[0042] Furthermore, the cross-section of the water collection pipe body 1 is circular, which allows the pipe body to be evenly stressed under the action of internal and external pressure difference, avoiding stress concentration at the corners of the rectangular cross-section. The wall thickness of the water collection pipe body 1 is 1.5-3mm, which reduces the weight of the pipe body while ensuring its rigidity.

[0043] Furthermore, the connection between the outer wall of the water collection pipe body 1 and the inner insert 2 adopts an arc-shaped transition to further disperse stress and improve structural strength.

[0044] Furthermore, the two ends of the water collection pipe body 1 are an inlet and an outlet, respectively. The inlet is equipped with a magnetic plug 4, and the outlet is connected to a water pump. Water accumulated in the bilge enters the water collection pipe body 1 through the magnetic plug 4 at the inlet, and is then drained from the water collection pipe by the water pump at the outlet.

[0045] Furthermore, at least one magnet body 5 is pre-embedded inside the inner insert 2 at the water inlet end of the water collection pipe body 1. The magnet body 5 is integrally formed with the water collection pipe body 1 and the inner insert 2. A magnetic plug 4 is provided at the water inlet end, and the magnetic plug 4 is attracted to the magnet body 5.

[0046] like Figure 7 As shown, the magnetic plug 4 is a long strip-shaped integrated structure that matches the size of the water inlet end, including a porous grid area 41 and a solid sealing area 42.

[0047] The porous grid area 41 includes two rows of symmetrically arranged oblong holes, spaced evenly along the length of the magnetic plug 4. The outer ends of the oblong holes are open to allow water to enter. Water accumulated in the chamber can quickly enter the water collection pipe through the oblong holes, increasing the flow area and making it less prone to clogging by small debris. It can also effectively block larger solid debris from entering, preventing damage to the water pump.

[0048] The solid sealing area 42 is a solid flat plate structure with rounded or chamfered edges. It contains a strong neodymium iron boron magnet with opposite poles to the magnet body 5 on the inner insert 2. The strong neodymium iron boron magnet is strongly magnetically attracted to the magnet body 5.

[0049] It should be noted that the inlet end of the water collection pipe is generally kept open to facilitate the timely drainage of water accumulated in the compartment.

[0050] The magnetic plug 4 is made of carbon fiber material, which is the same material as the water collection pipe body 1. It is significantly lighter than the metal plug, and the carbon fiber material is water-resistant, salt-resistant, and UV-resistant. It is not prone to corrosion and aging in the racing boat's operating environment, thus maintaining long-term reliability.

[0051] The magnet body 5 is a high-strength neodymium iron boron permanent magnet with a magnetic energy product of not less than 400 kJ / m³ to provide sufficient attraction force. The attraction force between the two is not less than 30 N to ensure that the magnetic plug 4 remains stable under the impact of water flow.

[0052] The magnet body 5 is pre-treated with a nickel-copper-nickel three-layer electroplating anti-corrosion treatment to avoid corrosion failure in competitive fresh water and slightly brackish water environments, ensuring that it can provide stable magnetic force output.

[0053] This invention also provides a method for preparing an integrated water collection pipe for racing boats, comprising the following steps:

[0054] S1. Lay 200g / m² double-layer 0° / 90° pre-impregnated carbon fiber cloth (T300 or T700 grade carbon fiber prepreg, epoxy resin matrix) on the metal mold to form a prefabricated foot pedal adjustment slide rail. After completion, use bolts or similar means to symmetrically fix it to both sides of the inner insert mold (e.g., Figure 3 (As shown).

[0055] As the core force-generating part of the athlete, the foot pedal adjustment slide rail is subjected to great force and needs sufficient strength. Therefore, a double-layer 0° / 90° pre-impregnated carbon fiber cloth with a strength of 200g / m² is selected. The fiber has good spreadability and is not easy to wrinkle during the layering process. While ensuring that the foot pedal adjustment slide rail has sufficient rigidity, it can also achieve a lightweight effect as much as possible.

[0056] S2. Evenly lay 100g / m² double-layer 0° / 90° prepreg carbon fiber cloth on the surface of the insert mold, with no less than two layers.

[0057] The inner insert 2 is the carrier of the water collection pipe body 1 and is connected to the hull 3. Although it is not the core stress point, it still needs the rigidity of the foundation to support the water collection pipe body 1 and resist the impact of water flow and the vibration of the hull. Therefore, 100g / m² double-layer 0° / 90° pre-impregnated carbon fiber cloth is selected, which can control the overall weight of the inner insert 2 to the maximum extent while ensuring the rigidity of the foundation, thus meeting the requirements of lightweighting.

[0058] S3, such as Figure 4 and Figure 5 As shown, the prefabricated carbon fiber water collection pipe body 1 and magnet body 5 are embedded into the corresponding grooves 6 on the inlay mold. The installation of the water collection pipe body 1 must ensure that it fits tightly with the contact surface of the inlay layer without any gaps.

[0059] S4. According to the shape of the insert mold, cut the insert to a thickness of 3mm and a density of 75-110kg / m³. 3 PMI foam is applied and laid on the inlay mold. If splicing is required, the spacing between adjacent PMI foam joints should not exceed 1 mm, and the joint direction should be perpendicular to the main stress direction to avoid the joint line becoming a weak point in the structure.

[0060] Compared to common PVC and PET foams, PMI foam offers higher compressive and shear strength while controlling overall weight. Furthermore, its closed-cell structure (closed-cell rate > 95%) results in extremely low water absorption and resistance to seawater corrosion and aging. During hot-press curing, the resin in the pre-impregnated carbon fiber cloth forms a strong bond with the PMI pore walls, creating a dense, integrated sealing layer that effectively prevents water accumulation and seawater penetration, addressing the shortcomings of traditional structures such as water seepage and corrosion.

[0061] S5. After sealing the foam-covered insert mold in a vacuum bag, place it in an autoclave for integral curing, so that the water pipe and the insert are integrally formed. The dimensions of the molded insert are checked; if they meet the standards, proceed to step S6.

[0062] The curing steps are as follows:

[0063] (1) The heating rate is 1-3℃ / min, the first curing temperature is 80-100℃, and the holding time is 30-60min. By slowly heating, the prepreg resin can flow evenly to wet the fiber and remove residual air bubbles, avoiding a sudden drop in resin viscosity due to rapid heating, which could lead to resin flow or air bubble aggregation; the holding time is 30-60min to allow the resin to begin cross-linking and gelling, and vacuum pumping is used to help remove residual air bubbles.

[0064] (2) Raise the temperature to the second curing temperature of 120-135℃ and hold for 90-120 minutes to allow the resin to fully crosslink and improve the degree of curing. The curing pressure is 0.3-0.6MPa to facilitate the compression of air bubbles, assist in the degassing, and ensure that the carbon fiber cloth and PMI foam are tightly bonded to guarantee the dimensional accuracy of the product. The vacuum degree shall not be lower than -0.095MPa.

[0065] (3) After curing, cool down to below 60°C at a rate not exceeding 2°C / min before opening the can and demolding. Slow cooling can reduce the thermal stress inside the product and prevent warping or cracking of the interface caused by rapid cooling.

[0066] S6, such as Figure 6 As shown, at least one layer of prepreg carbon fiber cloth is laid inside the hull 3 of the racing boat, and at least one layer of glass cloth transition layer 7 of varying width is laid on both sides of the bottom of the boat. The position of the transition layer 7 corresponds to the position of the inlay 2. Then the inlay 2 is placed on the layup and transition layer 7 inside the hull 3.

[0067] Specifically, the width of the upper glass cloth transition layer 7 is greater than that of the lower glass cloth transition layer 7. This is to allow the inlay 2 and the hull 3 to be better bonded together, to achieve a smooth transition of rigidity between the inlay 2 and the hull 3, to eliminate stress concentration caused by abrupt changes in rigidity, and to ensure that there are no indentations on the appearance of this position after molding.

[0068] S7. Alternately lay 75g / m² preimpregnated carbon fiber fabric and 100g / m² preimpregnated carbon fiber fabric at the joint between the insert 2 and the hull 3, with a total of 2-6 layers. The overlap width of each layer (i.e., the width of the layer covering beyond the edge of the insert 2 into the hull 3) should not be less than 20mm to form a sufficient load transfer area. The alternating laying method can ensure a uniform transition between layers of different weights, achieve a gradual change in layer stiffness, and prevent local stress concentration caused by abrupt changes in stiffness.

[0069] Two specifications of prepreg carbon fiber cloth are laid alternately, which ensures that the layup at the joint fits well to the complex surface, while also ensuring the structural load-bearing capacity of the joint.

[0070] S8. The completed structure is vacuum-sealed in a bag, and after vacuuming, it is sent to an autoclave. The curing process in step S5 is followed to perform integrated co-curing molding, so that the water pipe body 1, the inner insert 2 and the hull 3 are integrated into one unit. There are no adhesive interfaces or splicing gaps inside the structure, and the force transmission path is continuous and complete. This fundamentally eliminates the problems of insufficient strength, low assembly accuracy and inability to meet the needs of high-end racing boat applications in traditional post-assembly processes.

[0071] Furthermore, after co-curing in step S8, the entire assembly is demolded. The following inspections and post-processing are performed on the demolded integrated structure of "water pipe-inset-hull":

[0072] (1) Conduct visual inspection: Visually inspect the surface of the product and find no surface defects such as cracks, delamination, bubbles, warping, or pits;

[0073] (2) Perform dimensional inspection: Use precision measuring tools such as vernier calipers and laser measuring instruments to inspect key dimensions such as the positional accuracy of the water collection pipe (positional deviation relative to the design reference not exceeding ±0.5mm), the flatness of the pipe end (flatness error not exceeding 0.1mm), and the positional accuracy of the magnet body 5 (deviation relative to the design reference not exceeding ±1mm).

[0074] (3) Perform non-destructive testing (NDT): Use ultrasonic C-scanning to perform internal quality inspection on the water collection pipe-inlay joint area to confirm the interface bonding quality. There must be no delamination defects exceeding the design allowable size (usually the maximum allowable delamination area does not exceed 200mm²).

[0075] (4) Conduct a sealing test: Conduct a water pressure sealing test on the connection between the water outlet of the water collection pipe and the water pump. The test pressure is 0.3MPa and the pressure holding time is not less than 5min. The standard for passing is no leakage.

[0076] (5) Surface treatment and coating can be carried out according to the actual needs of the product: the exposed end of the water collection pipe is ground and the roughness Ra is not greater than 3.2μm; the anti-corrosion coating is applied according to the design requirements and the coating thickness is 60~120μm;

[0077] (6) Installation of water pump and accessories: Install water pump, pipe joints, plugs and other accessories according to the assembly drawings, and complete the final assembly of the water collection pipe system.

[0078] Example 2:

[0079] Based on Example 1, the present invention provides an integrated water collection pipe for racing boats, wherein the water inlet end is provided with a gradually expanding guide cavity with a flaring half-cone angle of 8°-15°, so that the fluid in the water inlet direction gradually and smoothly decelerates and pressurizes, converting dynamic pressure into static pressure, reducing the local pressure loss coefficient at the water inlet end, and improving the fluid transport efficiency of the water collection pipe.

[0080] The inlet end of the guide cavity is equipped with a rounded chamfer structure with a chamfer radius of 1-3mm to eliminate the sharp edge of the inlet end, reduce the fluid contraction effect and turbulence intensity at the inlet, further reduce the local hydraulic loss at the inlet, and eliminate the risk of sharp edge collision.

[0081] The outlet end is equipped with a tapered guide cone with a semi-cone angle of 5°-12°, which allows the fluid to gradually accelerate at the outlet end, realizing the conversion of static pressure to dynamic pressure, increasing the outlet flow velocity, and facilitating the efficient pumping of the water pump.

[0082] Example 3:

[0083] Based on the above embodiments, the present invention provides an integrated water collection pipe for racing boats. In step S3, before the water collection pipe body 1 is embedded into the inner insert mold, an interface adhesive is applied to its outer surface in advance. The coating thickness is 0.05-0.15mm to enhance the chemical bonding ability between the water collection pipe and the inner insert layer and improve the interface bonding strength.

[0084] The interface adhesive is an epoxy-modified adhesive film or liquid epoxy interface agent that is compatible with the prepreg resin system.

[0085] Furthermore, during the installation of the magnet body 5 in step S3, it is embedded in the plug installation area of ​​the water inlet of the water collection pipe. The magnet body 5 and the inner insert are wrapped and fixed with 100g / m² pre-impregnated carbon fiber cloth. This not only prevents the magnet body 5 from shifting during the subsequent curing process and ensures the relative positional accuracy between the magnet body 5 and the water collection pipe body 1 to meet the installation requirements of the magnetic plug 4, but also prevents the magnet body 5 from being directly exposed to the water flow environment and causing corrosion, thus extending the service life of the magnet body 5.

[0086] This invention provides an integrated water collection pipe for racing boats and its preparation method, which has the following beneficial effects.

[0087] (1) Breaking away from the traditional split structure, the water collection pipe adopts a three-in-one integrated structure of "water collection pipe-inlay-hull". The water collection pipe is not an independent component, but is formed as part of the inlay during the inlay production process and then formed as a whole with the hull. There are no splicing gaps or post-assembly traces among the three, forming a complete and coherent overall load-bearing structure. This improves the strength, rigidity and assembly accuracy of the water collection pipe from the structural source and optimizes the overall hydrodynamic performance of the racing boat.

[0088] (2) Adapting to the molding characteristics of carbon fiber materials, the water collection pipe molding process is deeply integrated with the molding process of the inlay and the hull. There is no need to reserve the water collection pipe installation position or the later assembly steps. This simplifies the manufacturing process, avoids the accumulation of errors in multiple processes, ensures the connection accuracy between the water collection pipe and the hull, reduces production costs, and improves production efficiency.

[0089] (3) Relying on the integrated structural design and the excellent properties of carbon fiber materials, the water collection pipe achieves the dual advantages of "lightweight and high rigidity", solves the problems of insufficient strength, poor fatigue resistance and low assembly precision of traditional water collection pipes, improves the water collection pipe's resistance to water flow impact, sealing performance, drainage performance and structural stability, and adapts to the stringent use requirements of high-end racing boats under high-speed driving and complex water flow conditions.

[0090] In the description of this invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0091] However, the above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A method for manufacturing an integrated water collection pipe for racing boats, characterized in that, Includes the following steps: S1. Prepare the foot pedal adjustment slide rail and install it symmetrically on both sides of the inner insert mold; S2. Spread the prepreg carbon fiber cloth evenly on the surface of the insert mold; S3. Embed the water collection pipe body and the magnet body into the corresponding grooves on the insert mold; S4. Lay the PMI foam onto the insert mold; S5. Solidify the mold of the inner insert with foam to form an integral part of the water pipe and the inner insert.

2. The method for preparing an integrated water collection pipe for racing boats according to claim 1, characterized in that, In step S1, when preparing the foot pedal adjustment slide rail, a double-layer 0° / 90° prepreg carbon fiber cloth of 200g / m² is laid on the metal mold to form a preform, and then the preform is fixedly installed on the insert mold.

3. The method for preparing an integrated water collection pipe for racing boats according to claim 1, characterized in that, In step S2, a double-layer 0° / 90° prepreg carbon fiber cloth of 100g / m² is laid on the insert mold, with no less than two layers.

4. The method for preparing an integrated water collection pipe for racing boats according to claim 1, characterized in that, In step S3, before the water collection pipe body is embedded into the insert mold, an interface adhesive is applied to its outer surface with a thickness of 0.05-0.15mm. The magnet body is then embedded in the plug installation area of ​​the water collection pipe inlet. The magnet body and the insert layer are wrapped and fixed by pre-impregnated carbon fiber cloth.

5. The method for preparing an integrated water collection pipe for racing boats according to claim 1, characterized in that, In step S4, the thickness of the PMI foam is 2-5mm and the density is 75-110kg / m³. Its cutting shape matches the curved surface of the inlay mold.

6. The method for preparing an integrated water collection pipe for racing boats according to claim 1, characterized in that, In step S5, a thermostatic tank is used for curing and molding. The curing steps are as follows: the heating rate is 1-3℃ / min, the first curing temperature is 80-100℃, and the holding time is 30-60min; then the temperature is raised to the second curing temperature of 120-135℃, and the holding time is 90-120min; the curing pressure is 0.3-0.6MPa, and the vacuum degree is not lower than -0.095MPa. After curing, the temperature is lowered to below 60℃ at a rate not exceeding 2℃ / min before opening the tank and demolding.

7. The method for preparing an integrated water collection pipe for racing boats according to claim 1, characterized in that, It also includes the following steps: S6. Lay at least one layer of pre-impregnated carbon fiber cloth in the hull of the racing boat, and lay at least one layer of glass cloth transition layer of varying width on both sides of the bottom of the boat. The position of the transition layer corresponds to the position of the inlay. Then, place the formed inlay in the hull. S7. Alternately lay 75g / m² prepreg carbon fiber cloth and 100g / m² prepreg carbon fiber cloth at the joint between the inner insert and the hull; S8. Perform integrated co-curing molding on the completed ply structure.

8. A method for preparing an integrated water collection pipe for racing boats according to claim 7, characterized in that, In step S6, the width of the upper glass cloth transition layer is greater than that of the lower glass cloth transition layer.

9. An integrated water collection pipe for racing boats, characterized in that, The device includes a water collection pipe body, which is integrally formed with an inner insert, and the inner insert is integrally formed with the hull. The water collection pipe body, the inner insert, and the hull are all made of carbon fiber material.

10. The integrated water collection pipe for racing boats according to claim 9, characterized in that, At least one magnet body is pre-embedded inside the inner insert at the water inlet end of the water collection pipe body. The magnet body is integrally formed with the water collection pipe body and the inner insert. A magnetic plug is provided at the water inlet end, and the magnetic plug is attracted to the magnet body.

Images