An adjustment structure for a marine fuel supply unit

Abstract

This invention relates to the field of marine fuel supply technology, specifically to an adjustment structure for a marine fuel supply unit. The structure includes a heat exchange box, a delivery pipe, and a suction pipe, both mounted on the heat exchange box. It also includes a mounting base, a motor, a sleeve, a stop block, a drive assembly, a stirring assembly, and a preheating assembly. The mounting base is located on the top of the heat exchange box, and the motor is mounted on the mounting base. Through the motor, drive assembly, stirring assembly, and preheating assembly, this invention continuously adjusts the flow state of the heavy oil in the heat exchange box according to changes in the viscosity of the heavy oil during preheating. After the viscosity of the heavy oil decreases, the preheating assembly rotates inside the heat exchange box, increasing the turbulence effect within the heavy oil and expanding the preheating range. This effectively improves the heat exchange efficiency between cold and hot oil within a limited preheating time, ensuring normal navigation during ship acceleration while maintaining economic efficiency.

Description

Technical Field

[0001] This invention relates to the field of marine fuel supply technology, specifically to an adjustment structure for a marine fuel supply unit. Background Technology

[0002] During a ship's voyage, fuel stored in the oil tank is pumped to the combustion chamber by an oil pump. The high-temperature and high-pressure gas generated during combustion drives the piston, thereby generating power to propel the ship. Commonly used fuels include heavy oil, diesel, and gasoline.

[0003] During long-distance ocean voyages, large container ships require a stable and sufficient fuel supply to minimize refueling stops. Heavy fuel oil, with its higher energy density and combustion efficiency compared to diesel and gasoline, generates more heat during combustion and is therefore widely used in large container ships. However, heavy fuel oil is viscous, and its viscosity is inversely proportional to temperature. Since the heavy fuel oil stored in storage tanks is close to ambient temperature, lower ambient temperatures leading to increased viscosity can impair pumping and thus affect the ship's navigation. Existing technologies offer solutions to these problems, such as the heat exchange box and marine fuel preheating system in a cargo hold energy-saving system (publication number CN109436280B). This system uses heating coils to heat the heavy fuel oil in the heat exchange box and injection pipes, and utilizes fuel optimization technology to reduce some of the heavy fuel oil's viscosity, thereby ensuring normal navigation. However, the following problems still exist: Due to the fixed position of the heating coil, when heating heavy oil in the heat exchanger, the temperature of the heavy oil near the heating coil rises rapidly, while the heavy oil near the edge of the heat exchanger is farther from the heating coil. At lower temperatures, the diffusion rate of heavy oil molecules is slower, affecting the heat exchange efficiency between the cold and hot oil. Furthermore, to cope with severe weather (such as typhoons), ships need to accelerate to areas away from the affected areas before the onset of severe weather. As the amount of heavy oil entering and leaving the heat exchanger increases rapidly per unit time during acceleration, the heating coil cannot effectively heat the rapidly entering cold oil, thus affecting the ship's normal navigation. While existing technology can increase the amount of preheated heavy oil to meet the ship's acceleration requirements by enlarging the heat exchanger, for economic reasons, ships typically choose a constant speed. Enlarging the heat exchanger to heat more heavy oil simultaneously would result in excessive energy consumption.

[0004] Therefore, in order to solve the above problems, an adjustment structure for a marine fuel supply unit is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustment structure for a marine fuel supply unit, solving the problem that a fixed position of the heating coil limits the heat exchange efficiency between cold and hot oil during heating. Through the inclusion of a motor, drive assembly, agitation assembly, and preheating assembly, the flow state of the heavy oil in the heat exchange tank can be continuously adjusted according to changes in the viscosity of the heavy oil during preheating. After the viscosity of the heavy oil decreases, the preheating assembly rotates inside the heat exchange tank, increasing the turbulence effect within the tank and expanding the preheating range. This effectively improves the heat exchange efficiency between cold and hot oil within a limited preheating time, ensuring normal navigation during ship acceleration while maintaining economic efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An adjustment structure for a marine fuel supply unit includes a heat exchange box, a fuel delivery pipe, and a fuel extraction pipe. Both the fuel delivery pipe and the fuel extraction pipe are mounted on the heat exchange box. The structure also includes a mounting base, a motor, a sleeve, a stop block, a drive assembly, a stirring assembly, and a preheating assembly. The mounting base is located on the top of the heat exchange box. The motor is mounted on the mounting base. The sleeve is located inside the heat exchange box and connected to the mounting base. The stop block is located on the inner wall of the sleeve. The drive assembly is located inside the sleeve. When the motor operates, it drives the drive assembly to rotate and press against the stop block. When the viscosity of the heavy oil is greater than the friction between the drive assembly and the stop block, the drive assembly passes over the stop block and intermittently impacts the inner wall of the sleeve. The stirring assembly is located on the sleeve. The preheating assembly is located on the stirring assembly. When the viscosity of the heavy oil is less than the friction between the drive assembly and the stop block, the drive assembly drives the stirring assembly and the preheating assembly to rotate synchronously via the stop block.

[0008] Preferably, the drive assembly includes a rotating rod, a fixed block, and an elastic telescopic rod. The mounting base is sleeved on the upper end of the sleeve. The rotating rod is coaxially disposed inside the sleeve and connected to the motor. The fixed block is sleeved on the rotating rod. Multiple elastic telescopic rods are disposed on the fixed block in a circumferential array. The stop block is disposed at the same height as the elastic telescopic rod. The free end of the elastic telescopic rod and the side facing the rotation direction of the motor output end are configured as a wedge-shaped surface.

[0009] It is known that to achieve rapid heating of the heat exchanger box to ensure a stable fuel supply to the engine, it is necessary to include, but not limited to, stirring the heavy oil with a stirring device in the initial stage of heating to ensure that the heat inside the heat exchanger box is evenly distributed in the heavy oil, thereby achieving rapid heating of the heavy oil in the heat exchanger box. Considering that the amount of heavy oil entering the heat exchanger box per unit time increases in the initial stage of heating and when the ship accelerates, and that the viscosity of the cold oil is relatively high, the driving torque required for the stirring device is relatively large at this time, which can easily cause damage to the driving device. Therefore, this solution is adopted. Through the installation of a rotating rod, an elastic telescopic rod, and a stop, the rotating rod, driven by a motor, rotates the elastic telescopic rod horizontally. A wedge-shaped surface at the free end of the elastic telescopic rod overcomes its elastic force when the heavy oil viscosity is high. This allows the wedge-shaped surface at the free end of the elastic telescopic rod to automatically contract when squeezed by the stop during rotation. When the free end of the elastic telescopic rod passes the stop, its elastic force quickly resets, causing it to rapidly impact the sleeve. The vibration generated by the intermittent impacts of multiple elastic telescopic rods inside the sleeve increases the diffusion rate of heavy oil molecules. Furthermore, as the viscosity of the heavy oil gradually decreases after heating, the elastic force of the elastic telescopic rod and the friction between the elastic telescopic rod and the stop overcome the viscosity of the heavy oil, thereby driving the stop and rotating the sleeve. This improves the heat exchange efficiency of hot and cold oil within a limited space, saving fuel while ensuring normal navigation during ship acceleration.

[0010] Preferably, the heat exchange box is provided with a protective cover that fits into the sleeve. The protective cover has multiple push plates arranged in a circular array on its inner circumference that are fixedly connected to the sleeve. Two oil extraction pipes are symmetrically arranged on both sides of the axis of the protective cover and both penetrate the protective cover. One of the oil extraction pipes penetrates to the outside of the heat exchange box.

[0011] By adopting the above scheme, during the process of extracting the preheated heavy oil from the heat exchange box, the kinetic energy generated during the extraction of the heavy oil can be used to assist in driving the sleeve to rotate, thereby assisting the stirring component to perform stirring operations, accelerating the heat exchange efficiency between cold and hot oil in the heat exchange box, and thus ensuring normal navigation when the ship accelerates.

[0012] Preferably, the agitation assembly includes a spiral blade and a guide rod. The spiral blade is sleeved on the sleeve, and two sets of guide grooves are formed on the inner wall along the axial direction. The guide rod is disposed on the sleeve and slidably disposed inside the corresponding guide groove. From a top view angle, the spiral direction of the spiral blade is aligned with the wedge-shaped surface of the free end of the elastic telescopic rod.

[0013] Through the above technical solution, when the viscosity of the heavy oil is reduced to a level that allows the sleeve to rotate, the spiral blades can tumble the heavy oil in the heat exchange box during the rotation of the sleeve, accelerating the heat transfer speed between cold and hot oil. Furthermore, when the ship encounters waves during navigation, the heavy oil in the heat exchange box can be agitated, allowing the spiral blades to float up and down along the axis of the sleeve, further accelerating the heat transfer speed between cold and hot oil. This effectively shortens the preheating time of the heavy oil in the heat exchange box, thus providing a stable and timely supply of heavy oil during ship acceleration, ensuring both economy and normal navigation. Simultaneously, as the elastic telescopic rod rotates around the axis of the sleeve and continuously passes the corresponding stops, the rotation of the spiral blades tumbles the heavy oil inside the heat exchange box from bottom to top. The heavier oil with higher density but lower heat moves upwards, while the heavier oil with lower density but higher heat moves towards the edge of the heat exchange box after being squeezed by the rotation of the spiral blades. This achieves continuous mixing of heavy oils with different heat levels, further accelerating the heat exchange efficiency between the cold and hot oils in the heat exchange box.

[0014] Preferably, the preheating assembly includes a spiral conveying pipe, two sleeves, and two hollow columns. The spiral conveying pipe is mounted on a spiral blade (the spiral conveying pipe can be made of copper, and the heavy oil in the heat exchange box is preheated during the process of conveying hot steam into the spiral conveying pipe), and both ends are connected to flexible hoses. The two hollow columns are fixedly sleeved on the sleeves, and the two flexible hoses are respectively installed through the corresponding hollow columns. The two sleeves are sleeved with the sleeves and are respectively installed on the bottom inner wall of the heat exchange box and the lower surface of the protective cover. Two guide pipes are installed through the heat exchange box, and the two guide pipes are respectively connected to the inside of the corresponding sleeves.

[0015] By adopting the above scheme, the heat conducted through the spiral conveying pipe can be concentrated near the spiral blade, thereby accelerating the heating speed of the heavy oil near the spiral blade and rapidly raising the temperature of the heavy oil near the surface of the spiral blade. This ensures that the sleeve can drive the spiral blade to rotate in a short time, that is, the heavy oil can be agitated in a short time during heating, thereby accelerating the heat exchange efficiency of local cold and hot oil. Furthermore, after the steam enters the interior of the heat exchange box through the lower guide pipe, it will accumulate in large quantities inside the lower hollow column, so that the cold oil that enters the heat exchange box and accumulates at the bottom can be heated in a concentrated manner, thereby improving the heat exchange efficiency of cold and hot oil.

[0016] Preferably, the spiral blade is provided with turbulence holes, and multiple turbulence holes are arranged equidistantly along the surface of the spiral blade, with the hole diameter decreasing from top to bottom. A heat pipe is installed inside the turbulence holes located on the same vertical line. The heat pipe is connected to the spiral conveying pipe. A fixing rod is provided on the heat pipe and is connected to the side wall of the spiral blade through the fixing rod. The evaporation section of the heat pipe is located in the upper section.

[0017] By adopting the above scheme, the gravity of the heavy oil and the upward thrust of the spiral blade can be used during the rotation of the spiral blade to allow a small portion of the heavy oil to pass through the turbulence hole from top to bottom. Furthermore, the flow velocity is accelerated when it flows out from the lower end of the turbulence hole, improving the turbulence effect of the heavy oil in the heat exchange box. With the help of the heat pipe and the fixing rod, the overall strength of the spiral blade is strengthened, and the heavy oil in the heat exchange box is also horizontally agitated, further accelerating the heat transfer speed between cold and hot oil and shortening the preheating time of the heavy oil in the heat exchange box. Under the action of the heat pipe, the heat that accumulates at the top due to its lower density can be transferred vertically to the bottom along the shortest path, effectively accelerating the heat exchange speed between cold and hot oil at different heights inside the heat exchange box.

[0018] Preferably, the sum of the weights of the spiral blade, the spiral conveying pipe, the heat pipe, and the fixed rod is greater than their buoyancy in heavy oil.

[0019] By adopting the above scheme, the viscosity of the heavy oil in the heat exchange box can be reduced to a level that allows the propeller blade to fall to the bottom when used during ship navigation. As the sleeve drives the propeller blade to rotate through the guide rod and guide groove, the upward lift generated during the rotation of the heavy oil can be used to drive the propeller blade to move upward, thereby accelerating the entry of the heavy oil into the turbulence hole from above. This further improves the turbulence effect inside the heat exchange box and can further improve the heat exchange efficiency of hot and cold oil.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By incorporating a motor, drive assembly, agitation assembly, and preheating assembly, the system can continuously strike the sleeve inside the heat exchanger during the initial preheating phase and when a large amount of cold oil enters the heat exchanger due to ship acceleration. This vibration accelerates the diffusion of heavy oil molecules, preventing the high viscosity of the heavy oil at lower temperatures from limiting the temperature exchange between cold and hot oil. As the preheating process progresses and the viscosity of the heavy oil decreases, the vibration motion is automatically converted into agitation motion. This agitation increases the heating range of the preheating assembly and the turbulence effect in the heavy oil, thereby increasing the heat exchange rate between the cold and hot oil in the heat exchanger. Within the limited volume of the heat exchanger, this ensures sufficient fuel supply during ship acceleration, meeting both economic requirements and guaranteeing normal ship navigation.

[0022] 2. Through the guide rod set on the sleeve and the guide groove opened on the spiral blade, the spiral blade can be driven to rotate during the rotation of the sleeve, and the heavy oil can be turned from bottom to top. When the heavy oil in the heat exchange box is sloshing as the ship accelerates away from the area affected by bad weather, the buoyancy of the heavy oil and the lift generated by the rotation of the heavy oil can be used to continuously adjust the vertical height of the spiral blade. During the rotation of the spiral blade and its up and down movement along the axis of the sleeve, the turbulence holes opened on the spiral blade are used to further improve the stirring effect, which further ensures the heat exchange efficiency of cold and hot oil. That is, while ensuring economy, it also ensures the normal navigation of the ship.

[0023] 3. By using multiple heat pipes and fixed rods at different heights, the structural strength of the spiral blades can be ensured in conjunction with the spiral conveying pipe. During the rotation of the spiral blades, the heat pipes at different heights provide horizontal auxiliary stirring for the heavy oil in the heat exchange box, increasing the convection effect between the cold and hot oils. Furthermore, the evaporation section of the heat pipes can absorb heat during the stirring process and transfer the heat to the lower part, further accelerating the heat exchange efficiency between the cold and hot oils. This ensures both economic efficiency and the normal navigation of the ship. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a partial cross-sectional view of the connection structure between the motor, sleeve, stop block, and drive assembly of the present invention.

[0026] Figure 3 For the present invention Figure 2 A magnified view of part A in the middle section;

[0027] Figure 4 For the present invention Figure 2 A schematic diagram of the structure of the drive component;

[0028] Figure 5 This is a schematic diagram of the connection structure between the sleeve and the agitator assembly of the present invention;

[0029] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of the medium-sized spiral blade;

[0030] Figure 7 This is a schematic diagram of the connection structure between the spiral blade and the preheating assembly of the present invention;

[0031] Figure 8 This is a diagram showing the spiral blade of the present invention submerged at the bottom.

[0032] In the diagram: 1. Heat exchange box; 11. Guide pipe; 2. Oil delivery pipe; 3. Oil extraction pipe; 4. Mounting base; 5. Motor; 6. Sleeve; 61. Protective cover; 62. Push plate; 7. Stop block; 8. Drive assembly; 81. Rotating rod; 82. Fixing block; 83. Elastic telescopic rod; 9. Agitation assembly; 91. Spiral blade; 911. Turbulence hole; 912. Heat pipe; 913. Fixing rod; 92. Guide rod; 93. Guide groove; 10. Preheating assembly; 101. Spiral conveying pipe; 1011. Hose; 102. Sleeve; 103. Hollow column. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 8 This invention provides an adjustment structure for a marine fuel supply unit, the technical solution of which is as follows:

[0035] For details, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 An adjustment structure for a marine fuel supply unit includes a heat exchange box 1, an oil delivery pipe 2, and an oil extraction pipe 3. It also includes a mounting base 4, a motor 5, a sleeve 6, a stop block 7, a drive assembly 8, an agitation assembly 9, and a preheating assembly 10. The mounting base 4 is located on the top of the heat exchange box 1. The motor 5 is mounted on the mounting base 4. The sleeve 6 is located inside the heat exchange box 1 and connected to the mounting base 4. The stop block 7 is located on the inner wall of the sleeve 6. The drive assembly 8 is located inside the sleeve 6. When the motor 5 operates, it drives the drive assembly. 8 rotates and presses the stop block 7; the drive assembly 8 includes a rotating rod 81, a fixed block 82 and an elastic telescopic rod 83, the mounting base 4 is sleeved with the upper end of the sleeve 6, the rotating rod 81 is coaxially arranged inside the sleeve 6 and connected to the motor 5, the fixed block 82 is sleeved on the rotating rod 81, the elastic telescopic rod 83 is arranged on the fixed block 82 and there are multiple elastic telescopic rods in a circumferential array, the stop block 7 is set at the same height as the elastic telescopic rod 83, and the free end of the elastic telescopic rod 83 and the side facing the output end of the motor 5 in the rotation direction are set as a wedge-shaped surface.

[0036] Under the above-mentioned conditions, during the heating of heavy oil in heat exchange box 1, motor 5 is started. The output end of motor 5 drives rotating rod 81 to rotate. When rotating rod 81 rotates, it drives fixed block 82 to rotate. Since elastic telescopic rod 83 is set on fixed block 82, rotating rod 81 can drive elastic telescopic rod 83 to rotate through fixed block 82 during rotation. Since stop block 7 is set on the inner wall of sleeve 6, the free end of elastic telescopic rod 83 will be blocked by stop block 7 during rotation around the axis of rotating rod 81. When the free end of elastic telescopic rod 83 is blocked by stop block 7, sleeve 6 will have a rotation tendency under the action of stop block 7. However, during the initial preheating stage and when the ship accelerates, the amount of cold oil entering the heat exchanger 1 per unit time increases. Due to the high viscosity of the cold oil and its wrapping around the outside of the sleeve 6, the sleeve 6 experiences significant resistance, causing the wedge-shaped surface of the free end of the elastic telescopic rod 83 to contract when blocked by the stop block 7. As the rotating rod 81 continues to rotate, the free end of the elastic telescopic rod 83 contacts the end face of the stop block 7. At this point, the elastic telescopic rod 83 is in its maximum contracted state until the free end of the elastic telescopic rod 83 passes the stop block 7 as the rotating rod 81 rotates. Under its own elastic force, the elastic telescopic rod 83 quickly resets and impacts the inner wall of the sleeve 6, thus completing the heat exchange process. Vibration occurs at the center of the interior of the heat exchange box 1. Since the rotating rod 81 is continuously rotating under the drive of the motor 5 and multiple elastic telescopic rods 83 and stops 7 are provided, the inner wall of the sleeve 6 can be continuously impacted by multiple elastic telescopic rods 83, thereby generating continuous vibration on the sleeve 6. This continuous vibration accelerates the irregular movement of heavy oil molecules, thereby accelerating the mixing speed of cold and hot oil. In other words, within the limited space of the heat exchange box 1, the preheating speed of heavy oil can be accelerated, thus providing a stable and timely fuel supply when the ship accelerates, ensuring both economy and normal navigation of the ship.

[0037] As one embodiment of the present invention, refer to Figure 1 , Figure 5 and Figure 6 The stirring component 9 is mounted on the sleeve 6, and the preheating component 10 is mounted on the stirring component 9. The stirring component 9 includes a spiral blade 91 and a guide rod 92. The spiral blade 91 is mounted on the sleeve 6, and two sets of guide grooves 93 are opened along the axial direction on the inner wall. The guide rod 92 is mounted on the sleeve 6 and is slidably mounted inside the corresponding guide groove 93. From a top view angle, the spiral direction of the spiral blade 91 is aligned with the wedge-shaped surface of the free end of the elastic telescopic rod 83.

[0038] Under the above conditions, as preheating continues, the viscosity of the heavy oil gradually decreases, reducing the resistance encountered by the sleeve 6 when it begins to rotate. Since the elastic telescopic rod 83 continuously rotates with the rotating rod 81, when the elastic force of the elastic telescopic rod 83 can overcome the viscosity of the heavy oil and the resistance of the stop block 7, the free end of the elastic telescopic rod 83 cannot pass the corresponding stop block 7 as the rotating rod 81 continues to rotate. This allows the stop block 7 to drive the sleeve 6 to rotate. Because the guide rod 92 is mounted on the sleeve 6, and the spiral blade 91 is sleeved on the sleeve 6 with a guide groove 93 inside, and the guide rod 92 is located inside the guide groove 93, the guide rod 92 can drive the spiral blade 91 to rotate during the rotation of the sleeve 6. During the rotation of the spiral blade 91, the heavy oil accumulated at the bottom of the heat exchange box 1 can be directed towards... The upward rotation of the spiral blades, due to the inverse relationship between the density and temperature of heavy oil, causes the lower-temperature heavy oil to accumulate at the bottom and the higher-temperature heavy oil to accumulate at the top. Therefore, during the rotation of the spiral blades 91, the lower-temperature heavy oil accumulated at the bottom of the heat exchange box 1 and the higher-temperature heavy oil floating at the top can exchange positions, thereby accelerating the diffusion speed of heavy oil molecules and improving the heat exchange speed between cold and hot oil. When the ship encounters wind and waves causing it to sway and the heavy oil in the heat exchange box 1 to slosh due to the rotation of the spiral blades 91, the guide rods 92 can provide vertical freedom to the spiral blades 91, realizing dual vertical stirring of the heavy oil in the heat exchange box 1, further improving the heat exchange efficiency between cold and hot oil, thus ensuring both economy and normal navigation during ship acceleration.

[0039] As one embodiment of the present invention, refer to Figure 1 and Figure 2 The heat exchange box 1 is equipped with a protective cover 61 that is sleeved with the sleeve 6. The protective cover 61 has multiple push plates 62 that are fixedly connected to the sleeve 6 in a circular array inside. Two oil suction pipes 3 are symmetrically arranged on both sides of the axis of the protective cover 61 and both penetrate the protective cover 61. One of the oil suction pipes 3 penetrates to the outside of the heat exchange box 1.

[0040] Under the above conditions, when the preheated heavy oil is pumped into the combustion chamber, the heavy oil will enter and exit the protective cover 61 under the action of the two oil extraction pipes 3, and will impact the push plate 62 during the process of entering and exiting the protective cover 61. Since the push plate 62 is set on the sleeve 6, the push plate 62 will also generate a rotation tendency after being impacted, which can assist in driving the sleeve 6 to rotate, effectively improving the heat exchange efficiency of the heavy oil in the heat exchange box 1.

[0041] As one embodiment of the present invention, refer to Figure 1 , Figure 7The preheating assembly 10 includes a spiral conveying pipe 101, two sleeves 102, and two hollow columns 103. The spiral conveying pipe 101 is disposed on the spiral blade 91 and both ends are connected to flexible hoses 1011. The two hollow columns 103 are fixedly sleeved on the sleeve 6. The two flexible hoses 1011 are respectively disposed through the corresponding hollow columns 103. The two sleeves 102 are sleeved with the sleeve 6 and are respectively disposed on the bottom inner wall of the heat exchange box 1 and the lower surface of the protective cover 61. Two guide pipes 11 are disposed through the heat exchange box 1 and are respectively connected to the interior of the corresponding sleeves 102.

[0042] Under the above-mentioned conditions, the steam in the spiral conveying pipe 101 can flow along the surface of the spiral blade 91, causing the surface of the spiral blade 91 to heat up rapidly. The spiral conveying pipe 101 can also block the edge of the surface of the spiral blade 91. During the rotation of the spiral blade 91, the heavy oil below can be effectively transported upward, reducing the amount of heavy oil diffused to the surroundings, thereby improving the heat exchange efficiency of cold and hot oil.

[0043] As one embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 The spiral blade 91 is provided with turbulence holes 911. Multiple turbulence holes 911 are arranged equidistantly along the surface of the spiral blade 91, and the hole diameter decreases from top to bottom. Heat pipes 912 are installed inside the turbulence holes 911 located on the same vertical line. The heat pipes 912 are connected to the spiral conveying pipe 101. A fixing rod 913 is provided on the heat pipe 912 and is connected to the side wall of the spiral blade 91 through the fixing rod 913. The evaporation section of the heat pipe 912 is located in the upper section.

[0044] Under the aforementioned conditions, during the rotation of the spiral blade 91, a small portion of the heavy oil agitated by the spiral blade 91 can enter the interior of the turbulence hole 911 from the upper port under its own gravity, and flow out from the lower port of the turbulence hole 911 as the spiral blade 91 rotates. Since the diameter of the upper port of the turbulence hole 911 is larger than that of the lower port, the heavy oil will accelerate when flowing out from the lower port of the turbulence hole 911, thereby increasing the turbulence effect of the heavy oil in the heat exchange box 1. When the spiral blade 91 moves upward along the axis of the sleeve 6 due to the swaying of the ship causing the heavy oil to slosh, it can accelerate the outflow speed of the heavy oil from the lower port of the turbulence hole 911. When the spiral blade 91 moves downward along the axis of the sleeve 6, a small portion of the heavy oil will enter the interior of the turbulence hole 911 from the lower port and then flow out from the upper port of the turbulence hole 911. The flow is expelled and diffuses outwards from the upper port of the turbulence hole 911, further enhancing the turbulence effect inside the heavy oil. During the rotation of the spiral blade 91, the heat pipe 912 can be driven to revolve around the axis of the sleeve 6 by the connection of the fixed rod 913. Since there are multiple heat pipes 912 and the height of each heat pipe 912 is not equal, the heavy oil can be auxiliary stirred in the horizontal direction at different heights when multiple heat pipes 912 rotate, further improving the heat exchange effect between cold and hot oil. In addition, the heat pipe 912 can guide the heat in the heavy oil in the heat exchange box 1 during the entire heating process, guiding the heat in the high-temperature heavy oil that is concentrated at the top due to its lower density to the bottom, thereby improving the heat exchange efficiency between cold and hot oil in the heat exchange box 1 and effectively improving the preheating speed of the heavy oil in the heat exchange box 1.

[0045] As one embodiment of the present invention, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 The sum of the weights of the spiral blade 91, the spiral conveying pipe 101, the heat pipe 912, and the fixed rod 913 is greater than its buoyancy in heavy oil.

[0046] Under the above conditions, when the viscosity of the heavy oil decreases to a level suitable for use during ship navigation, the spiral blade 91 falls to its lowest position. As the sleeve 6 drives the spiral blade 91 to rotate through the guide rod 92 and guide groove 93, it can cooperate with the upward lift generated during the rotation of the heavy oil to drive the spiral blade 91 to move upward, thereby accelerating the entry of the heavy oil from above into the interior of the turbulence hole 911, further improving the turbulence effect inside the heat exchange box 1, and thus improving the heat exchange efficiency of the hot and cold oil.

[0047] Working principle:

[0048] During the preheating of heavy oil in heat exchange box 1, motor 5 is started. The output end of motor 5 drives the rotating rod 81 to rotate. During the rotation of the rotating rod 81, the fixed block 82 is driven to rotate. During the rotation of the fixed block 82, the elastic telescopic rod 83 is driven to rotate. During the rotation of the elastic telescopic rod 83, the free end hits the stop block 7.

[0049] During the initial preheating phase and the process of cold oil accelerating into the heat exchanger 1 due to the ship's accelerated navigation, when the viscosity of the heavy oil is greater than the elastic force of the elastic telescopic rod 83: when the rotating rod 81 rotates, the wedge-shaped surface of the free end of the elastic telescopic rod 83 will be driven to contract due to the obstruction of the stop block 7. As the rotating rod 81 continues to rotate, at the moment when the free end of the elastic telescopic rod 83 passes the corresponding stop block 7, the elastic telescopic rod 83 resets under its own elastic action, and during the reset process, the free end collides with the inner wall of the sleeve 6. Since there are multiple stop blocks 7 and the rotating rod 81 continues to rotate under the action of the motor 5, the elastic telescopic rod 83 can continuously impact the inner wall of the sleeve 6. Thus, in the initial preheating phase and the process of cold oil accelerating into the heat exchanger 1 due to the ship's accelerated navigation, the diffusion speed of heavy oil molecules is accelerated by vibration. The heat pipe 912 can transport the heat that is concentrated at the top due to its low density downwards to ensure the preheating effect in the initial preheating phase.

[0050] As the preheating process proceeds, the heavy oil near the spiral blade 91 will heat up first due to its proximity to the spiral conveying pipe 101. When the viscosity of the heavy oil near the spiral blade 91 is less than the elastic force of the elastic telescopic rod 83: when the rotating rod 81 drives the elastic telescopic rod 83 to rotate via the fixed block 82, it can overcome the viscosity of the heavy oil, causing the free end of the elastic telescopic rod 83 to drive the stop block 7 to rotate. During the rotation of the stop block 7, the sleeve 6 can be driven to rotate. During the rotation of the sleeve 6, the spiral blade 91 can be driven to rotate. During the rotation of the spiral blade 91, it can not only drive the spiral conveying pipe 101, but also... The tube 101 rotates to increase the heating range and can also turn the lower-temperature heavy oil inside the heat exchange box 1 upwards. During the turning process, a small amount of heavy oil can continuously pass through the corresponding turbulence holes 911, which increases the turbulence effect of the heavy oil in the heat exchange box 1 and accelerates the heat exchange speed between cold and hot oil. At the same time, the connection between the fixed rod 913 and the heat pipe 912 can drive the heat pipe 912 to rotate, and the heavy oil inside the heat exchange box 1 can be stirred horizontally at different height positions, thereby improving the heat exchange effect inside the heavy oil.

[0051] After preheating, when the ship encounters waves during navigation, causing the heavy oil inside the heat exchange box 1 to slosh, the spiral blade 91 can sway up and down inside the heat exchange box 1 along the axis of the sleeve 6 under the action of the guide rod 92 and the guide groove 93. This can further improve the heat exchange efficiency inside the heavy oil. Since the ship needs to continuously pump the preheated heavy oil inside the heat exchange box 1 to the combustion chamber for combustion through the oil extraction pipe 3 during navigation, the kinetic energy generated by the flow of heavy oil during the extraction of heavy oil through the oil extraction pipe 3 can act on the push plate 62 inside the cover 61. After being impacted, the push plate 62 can assist in driving the sleeve 6 to rotate, thereby improving the heat exchange efficiency of cold and hot oil. This ensures normal navigation when the ship accelerates while maintaining economy.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustment structure for a marine fuel supply unit, comprising a heat exchange box (1), an oil delivery pipe (2), and an oil extraction pipe (3), characterized in that: It also includes a mounting base (4), a motor (5), a sleeve (6), a stop (7), a drive assembly (8), a stirring assembly (9), and a preheating assembly (10). The mounting base (4) is located on the top of the heat exchange box (1). The motor (5) is located on the mounting base (4). The sleeve (6) is located inside the heat exchange box (1) and connected to the mounting base (4). The stop (7) is located on the inner wall of the sleeve (6). The drive assembly (8) is located inside the sleeve (6). When the motor (5) is working, it drives the drive assembly (8) to rotate and squeeze the stop (7). The stirring assembly (9) is located on the sleeve (6). The preheating assembly (10) is located on the stirring assembly (9). The drive assembly (8) includes a rotating rod (81), a fixed block (82), and an elastic telescopic rod (83). The mounting base (4) is sleeved on the upper end of the sleeve (6). The rotating rod (81) is coaxially arranged inside the sleeve (6) and connected to the motor (5). The fixed block (82) is sleeved on the rotating rod (81). The elastic telescopic rod (83) is arranged on the fixed block (82) and there are multiple of them in a circumferential array. The stop block (7) is set at the same height as the elastic telescopic rod (83). The free end of the elastic telescopic rod (83) and the side facing the output end of the motor (5) in the direction of rotation are set as a wedge-shaped surface. The stirring assembly (9) includes a spiral blade (91) and a guide rod (92). The spiral blade (91) is sleeved on the sleeve (6) and has two sets of guide grooves (93) axially opened on its inner wall. The guide rod (92) is set on the sleeve (6) and slidably disposed inside the corresponding guide groove (93). From a top view angle, the spiral direction of the spiral blade (91) is aligned with the wedge-shaped surface of the free end of the elastic telescopic rod (83).

2. The adjustment structure of a marine fuel supply unit according to claim 1, characterized in that: The heat exchange box (1) is provided with a protective cover (61) that fits into the sleeve (6). The protective cover (61) has a plurality of push plates (62) that are fixedly connected to the sleeve (6) arranged in a circular array inside. Two oil extraction pipes (3) are symmetrically arranged on both sides of the axis of the protective cover (61) and both penetrate the protective cover (61). One of the oil extraction pipes (3) penetrates to the outside of the heat exchange box (1).

3. The adjustment structure of a marine fuel supply unit according to claim 2, characterized in that: The preheating assembly (10) includes a spiral conveying pipe (101), two sleeves (102) and two hollow columns (103). The spiral conveying pipe (101) is disposed on a spiral blade (91) and both ends are connected to hoses (1011). The two hollow columns (103) are fixedly sleeved on the sleeve (6). The two hoses (1011) are respectively disposed through the corresponding hollow columns (103). The two sleeves (102) are sleeved with the sleeve (6) and are respectively disposed on the bottom inner wall of the heat exchange box (1) and the lower surface of the protective cover (61). Two guide pipes (11) are disposed through the heat exchange box (1) and are respectively connected to the inside of the corresponding sleeves (102).

4. The adjustment structure of a marine fuel supply unit according to claim 3, characterized in that: The spiral blade (91) is provided with turbulence holes (911), and multiple turbulence holes (911) are arranged equidistantly along the surface of the spiral blade (91), with the hole diameter decreasing from top to bottom.

5. The adjustment structure of a marine fuel supply unit according to claim 4, characterized in that: A heat pipe (912) is installed inside the turbulence holes (911) located on the same vertical line. The heat pipe (912) is connected to the spiral conveying pipe (101). A fixing rod (913) is provided on the heat pipe (912) and is connected to the side wall of the spiral blade (91) through the fixing rod (913). The evaporation section of the heat pipe (912) is located in the upper section.

6. The adjustment structure of a marine fuel supply unit according to claim 5, characterized in that: The sum of the weights of the spiral blade (91), the spiral conveying pipe (101), the heat pipe (912), and the fixed rod (913) is greater than their buoyancy in heavy oil.

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