Marine electromagnetic induction heating type air pipe head and heating method

Abstract

The present application relates to a kind of air pipe head and heating method of marine electromagnetic induction heating type, be equipped with gas guide cover, the bottom of gas guide cover is equipped with exhaust hole, exhaust hole is connected with exhaust pipe, the middle part of gas guide cover is through gas guide channel, gas guide channel includes left gas guide part, middle gas guide part and right gas guide part, middle gas guide part is located in gas guide cover, left gas guide part and right gas guide part are respectively extended through the side wall of gas guide cover, the upper end surface of middle gas guide part is equipped with inner gas guide hole, middle gas guide part and the gap between the lower side of gas guide cover, front gap, rear gap and upper gap form gas guide cavity, electromagnetic heating mechanism is equipped on middle gas guide part, the middle part of electromagnetic heating mechanism is connected with guide rod, guide rod is equipped with stainless steel buoy, with the advantages of low-temperature sea area marine, remote control, avoid air pipe head plugging, prevent air permeation failure, seawater backflow into cabin, ship water inverting etc.

Description

Technical Field

[0001] This invention relates to the field of marine ventilation system technology, specifically to a marine electromagnetic induction heating type air pipe head and heating method that is simple in structure, suitable for use in low-temperature marine environments, remotely controllable, avoids air pipe head blockage, prevents ventilation failure, prevents seawater backflow into the cabin, and prevents ship capsizing due to water ingress. Background Technology

[0002] As is well known, marine air vent caps (also known as vent caps) are critical safety devices for ship liquid tanks (fuel tanks, ballast water tanks, freshwater tanks, etc.). Their core function is to maintain pressure balance between the inside and outside of the tank and prevent seawater / rainwater from entering. They feature an internal float mechanism that automatically closes when the ship tilts or encounters rough seas, preventing seawater from entering. Normal state: The float is in a low position, the air vent is unobstructed, allowing free ventilation / absorption. Water ingress state: When seawater enters the vent cap, the float rises under buoyancy, tightly sealing against the sealing ring and automatically closing the passage. Recovery state: After the water is drained, the float falls back, the passage reopens, and ventilation function is restored. When ships are sailing in cold waters or frigid zones, moisture in the air or from the liquid tanks can cause ice to form on the vent cap, buoys, sealing surfaces, and filters, leading to ventilation failure, seawater backflow into the tank, and potentially causing the ship to capsize. The requirement is to solve this problem by integrating heating into marine air ducts. Existing heated air ducts primarily use electric heat tracing (the most mainstream method, commonly used on small and ocean-going vessels). This involves wrapping a self-regulating electric heat tracing cable around the outer wall of the air duct body and the upper vent section, followed by an insulation layer. Steam heat tracing is preferred for large cargo ships and oil tankers. Hot water heat tracing is rarely used, only on some passenger ships and engineering vessels. All of these heating methods involve heating the outside of the air duct and covering it with insulation material, resulting in a relatively large volume. Heat is conducted from the outside to the inside, leading to significant heat loss. Hot water and steam require additional piping. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a marine electromagnetic induction heating type air pipe head and heating method that is simple in structure, occupies little space, is suitable for use in low-temperature marine environments, can be remotely controlled, avoids air pipe head blockage, prevents air permeability failure, prevents seawater backflow into the cabin, and prevents ship capsizing due to water ingress.

[0004] The technical solution adopted by this invention to solve its technical problem is: A marine electromagnetic induction heating type air pipe head is provided with an air guide cover, and an exhaust hole is provided at the bottom of the air guide cover. The exhaust hole is connected to an exhaust pipe. The air guide cover has a through air guide channel in the middle, which includes a left air guide part, a middle air guide part and a right air guide part. The middle air guide part is located inside the air guide cover. The left air guide part and the right air guide part extend out through the side wall of the air guide cover, respectively. The upper end face of the middle air guide part is provided with an inner air guide hole. An air guide cavity is formed between the middle air guide part and the lower gap, front gap, rear gap and upper gap of the air guide cover. An electromagnetic heating mechanism is provided on the middle air guide part below the inner air guide hole of the middle air guide part. A guide rod is connected to the middle of the electromagnetic heating mechanism, and a stainless steel float is sleeved on the guide rod.

[0005] The electromagnetic heating mechanism of the present invention includes a coil protective shell, an electromagnetic coil, a controller, and a temperature sensor. The temperature sensor is fixed on the air guide cover. The electromagnetic coil is arranged inside the coil protective shell. The conductive connector of the electromagnetic coil extends out of the coil protective shell and is connected to a conductive wire. The conductive wire is connected to the power module on the controller. The controller is connected to the temperature sensor.

[0006] The edge of the internal air guide hole of the present invention is connected to the top sealing ring. After the stainless steel float is raised, it seals with the top sealing ring to prevent seawater from entering the pipe head.

[0007] The controller described in this invention is placed inside a control box, on which a manual temperature adjustment knob is installed. A temperature adjustment module is installed on the controller, and the temperature adjustment module is connected to an electromagnetic coil. The temperature is adjusted through the temperature adjustment module.

[0008] The height from the top of the guide rod to the upper end of the middle air guide section is less than the height of the stainless steel float, which ensures the guidance of the stainless steel float while preventing the stainless steel float from falling off the guide rod.

[0009] The left air guide section of this invention is configured as a left air guide cover plate, which is connected to the left through hole of the air guide outer cover via locking bolts. The right air guide section is configured as a right air guide cover plate, which is connected to the right through hole of the air guide outer cover via locking bolts. The middle air guide section is configured as a middle guide tube, with both ends of the middle guide tube communicating with the left and right through holes of the air guide outer cover respectively and welded to the inner wall of the air guide outer cover. The inner air guide hole is located at the top of the middle guide tube. Side filters are installed between the left and right air guide covers and the air guide outer cover with the left and right through holes respectively.

[0010] The coil protective shell of the present invention is made of Teflon to avoid seawater corrosion and is resistant to high temperature. The intermediate conduit is made of steel and can be heated by the eddy current effect of the electromagnetic coil.

[0011] The stainless steel pontoon of the present invention has a sealing slope on the top circumference. The top part of the stainless steel pontoon is inserted into the inner air guide hole through the sealing slope, and the sealing slope and the top sealing ring are squeezed and sealed.

[0012] The gas guide cover of the present invention has an inspection hole in the middle of the top, and an inspection cover is installed on the inspection hole. The inspection cover is connected to the gas guide cover by inspection bolts.

[0013] A heating method for a marine electromagnetic induction heating type air pipe head, characterized by the following steps: (1) Normal state: The stainless steel float is in a low position, the stainless steel float sits at the bottom of the middle air guide, there is a breathable gap between the stainless steel float and the top sealing ring, the air pipe head is unobstructed, the liquid tank and the empty ship can breathe and breathe freely, the high frequency magnetic field generated by the electromagnetic coil at the bottom of the middle air guide will pass through the bottom of the middle guide tube and the stainless steel float, the bottom of the stainless steel float will generate electromagnetic induction, and the eddy current formed at the bottom of the stainless steel float will generate heat due to the eddy current effect. The heat generated between the bottom of the middle guide tube and the stainless steel float will diffuse into the entire air pipe head, preventing the stainless steel float and the coil protective shell from sticking together due to icing, and also preventing the top sealing ring from being sealed poorly due to icing, and preventing the filter screen on the side of the air pipe head from being frozen and causing poor ventilation. (2) Water inlet state: When the seawater enters the pipe head through the left and right air guide covers when the ship capsizes, the stainless steel float rises along the guide rod under buoyancy and fits tightly with the top sealing ring, automatically closing the air guide cavity. The high-frequency magnetic field generated by the electromagnetic coil will pass through the side wall and bottom of the middle guide tube. The middle guide tube will heat up due to the eddy current effect. As the float rises away from the bottom of the middle guide tube, the high-frequency magnetic field generated by the electromagnetic coil will partially enter the air pipe head shell. The air pipe head shell will introduce heat into the air pipe head. The air pipe head will heat up due to the eddy current effect, preventing the seawater inside the air pipe head from generating ice fragments that clog the side filter screen. (3) Recovery state: After the water is discharged, the stainless steel float falls back, the air gap reopens, and the air permeability function is restored. The high-frequency magnetic field generated by the electromagnetic coil will pass through the bottom of the intermediate duct and the stainless steel float. The bottom of the intermediate duct and the stainless steel float will heat up due to the eddy current effect. The heat generated by the bottom of the intermediate duct and the stainless steel float will diffuse into the entire air pipe head, maintaining the normal working state of the air pipe head.

[0014] Due to the above-mentioned structure, this invention has the advantages of simple structure, marine use in low-temperature sea areas, remote control capability, avoidance of air pipe blockage, prevention of air permeability failure, prevention of seawater backflow into the cabin, and prevention of ship capsizing due to water ingress. Attached Figure Description

[0015] Figure 1 This is a front view of the air pipe head of the present invention, without showing the controller structure.

[0016] Figure 2 This is a left view of the air tube head of the present invention, without showing the controller structure.

[0017] Figure 3 This is a top view of the air pipe head of the present invention, without showing the controller structure.

[0018] Figure 4 This is a front sectional view of the air pipe head of the present invention under normal conditions.

[0019] Figure 5 This is a left view showing a partial cross-section of the air pipe head of the present invention under normal conditions.

[0020] Figure 6 This is a front sectional view of the air pipe head under water inlet conditions according to the present invention.

[0021] Figure 7 This is a left-hand cross-sectional view of the air pipe head in the water inlet state of the present invention.

[0022] Reference numerals in the attached drawings: 1. Outer cover for air guide; 2. Exhaust pipe; 3. Left air guide section; 301. Left air guide cover; 4. Middle air guide section; 401. Middle guide tube; 5. Right air guide section; 501. Right air guide cover; 6. Inner air guide hole; 7. Air guide chamber; 8. Guide rod; 9. Stainless steel float; 10. Coil protective shell; 11. Electromagnetic coil; 12. Controller; 13. Temperature sensor; 14. Top sealing ring; 15. Side filter screen; 16. Sealing slope; 17. Inspection hole; 18. Inspection cover. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings: As shown in the attached figure, a marine electromagnetic induction heating type air pipe head is provided with an air guide cover 1. The bottom of the air guide cover 1 is provided with an exhaust hole, which is connected to an exhaust pipe 2. The air guide cover 1 has a through air guide channel in the middle, which includes a left air guide part 3, a middle air guide part 4, and a right air guide part 5. The middle air guide part 4 is located inside the air guide cover 1. The left air guide part 3 and the right air guide part 5 extend out through the side wall of the air guide cover 1, respectively. The upper end face of the middle air guide part 4 is provided with an inner air guide hole 6. An air guide cavity 7 is formed between the middle air guide part 4 and the lower gap, front gap, rear gap, and upper gap of the air guide cover 1. An electromagnetic heating mechanism is provided on the middle air guide part 4 below the inner air guide hole 6. The middle part of the electromagnetic heating mechanism is connected to a guide rod 8, and a stainless steel float 9 is sleeved on the guide rod 8.

[0024] Furthermore, the electromagnetic heating mechanism includes a coil protective shell 10, an electromagnetic coil 11, a controller 12, and a temperature sensor 13. The temperature sensor 13 is fixed on the air guide cover 1. The electromagnetic coil 11 is arranged inside the coil protective shell 10. The conductive connector of the electromagnetic coil 11 extends out of the coil protective shell 10 and is connected to a conductive wire. The conductive wire is connected to the power module on the controller 12. The controller 12 is connected to the temperature sensor 13.

[0025] Furthermore, the edge of the inner air guide hole 6 is connected to the top sealing ring 14. After the stainless steel float 9 is raised, it seals with the top sealing ring 14 to prevent seawater from entering the pipe head.

[0026] Furthermore, the controller 12 is placed inside a control box, on which a manual temperature adjustment knob is installed. A temperature adjustment module is installed on the controller 12, and the temperature adjustment module is connected to the electromagnetic coil 11. The temperature is adjusted through the temperature adjustment module.

[0027] Furthermore, the height from the top of the guide rod 8 to the upper end of the middle air guide part 4 is less than the height of the stainless steel float 9, which ensures that the stainless steel float 9 is guided while also preventing the stainless steel float 9 from falling off the guide rod 8.

[0028] Furthermore, the left air guide section 3 is configured as a left air guide cover plate 301, which is connected to the left through hole of the air guide cover 1 via a locking bolt. The right air guide section 5 is configured as a right air guide cover plate 501, which is connected to the right through hole of the air guide cover 1 via a locking bolt. The middle air guide section 4 is configured as a middle guide tube 401, which is connected to the left and right through holes of the air guide cover 1 via bolts and welded to the inner wall of the air guide cover 1 via bolts. The inner air guide hole 6 is located at the top of the middle guide tube 401. Side filters 15 are installed between the left air guide cover plate 301 and the right air guide cover plate 501 and the air guide cover 1 via the left and right through holes of the air guide cover 1 via bolts.

[0029] The left air guide cover 301 and the right air guide cover 501 of the above scheme have a U-shaped structure. The outer side wall of the opening end of the U-shaped structure is vertically connected to the wing plate. The wing plate has a through hole, and the locking bolt passes through the through hole to connect with the air guide cover. The left air guide cover 301 and the right air guide cover 501 of the U-shaped structure are arranged in the vertical air passage direction.

[0030] Furthermore, the coil protective shell 10 is made of Teflon to prevent seawater corrosion and is resistant to high temperatures, and the intermediate conduit 401 is made of steel and can be heated by the eddy current effect of the electromagnetic coil 11.

[0031] Furthermore, the stainless steel pontoon 9 has a sealing slope 16 on its top circumference. The top part of the stainless steel pontoon 9 is inserted into the inner air guide hole 6 through the sealing slope 16, and the sealing slope 16 is squeezed and sealed with the top sealing ring 14.

[0032] Furthermore, the top of the air guide cover 1 is provided with an inspection hole 17 in the middle, and an inspection cover 18 is installed on the inspection hole 17. The inspection cover 18 is connected to the air guide cover 1 via inspection bolts.

[0033] The top of the cover plate is provided with a temperature sensor mounting hole, and the temperature probe of the temperature sensor 13 is inserted into the temperature sensor mounting hole to monitor the temperature inside the air guide cover 1.

[0034] A heating method for a marine electromagnetic induction heating type air pipe head, characterized by the following steps: (1) Normal state: The stainless steel float 9 is in a low position and sits at the bottom of the middle air guide 4. There is a ventilation gap between the stainless steel float 9 and the top sealing ring 14. The air pipe head is unobstructed, and the liquid tank and the empty ship can breathe and breathe freely. The high-frequency magnetic field generated by the electromagnetic coil 11 at the bottom of the middle air guide 4 will pass through the bottom of the middle guide tube 401 and the stainless steel float 9. The bottom of the stainless steel float 9 will generate electromagnetic induction. By generating an alternating magnetic field, eddy currents will be formed at the bottom of the stainless steel float 9, which will generate heat due to the eddy current effect. The heat generated between the bottom of the middle guide tube 401 and the stainless steel float 9 will diffuse into the entire air pipe head, preventing the stainless steel float 9 and the coil protective shell 10 from sticking together due to icing. It also prevents the top sealing ring 14 from being sealed poorly due to icing, and prevents the air pipe head side filter screen 15 from being frozen and causing poor ventilation. (2) Water inlet state: When the seawater enters the pipe head through the left air guide cover 301 and the right air guide cover 501 during a giant wave or when the ship capsizes, the stainless steel float 9 rises along the guide rod 8 under buoyancy and fits tightly with the top sealing ring 14, automatically closing the air guide cavity 7. The high-frequency magnetic field generated by the electromagnetic coil 11 will pass through the side wall and bottom of the middle guide tube 401. The middle guide tube 401 will heat up due to the eddy current effect. As the float floats away from the bottom of the middle guide tube 401, the high-frequency magnetic field generated by the electromagnetic coil 11 will partially enter the air pipe head shell. The air pipe head shell will introduce heat into the air pipe head. The air pipe head will heat up due to the eddy current effect, preventing the seawater inside the air pipe head from generating ice fragments that block the side filter screen 15. (3) Recovery state: After the water is discharged, the stainless steel float 9 falls back, the air gap reopens, and the air permeability function is restored. The high-frequency magnetic field generated by the electromagnetic coil 11 will pass through the bottom of the intermediate conduit 401 and the stainless steel float 9. The bottom of the intermediate conduit 401 and the stainless steel float 9 will heat up due to the eddy current effect. The heat generated by the bottom of the intermediate conduit 401 and the stainless steel float 9 will diffuse into the entire air pipe head, maintaining the normal working state of the air pipe head.

[0035] In the above scheme, the temperature of the air pipe head heated by the electromagnetic coil 11 is 0-10 degrees Celsius, which can avoid freezing and defrosting while saving energy. The internal structure of the controller 12 is the same as that of the prior art, and will not be described in detail here. The power control system of the electromagnetic coil 11 adopts the power adjustment method of periodic intermittent switching. The coil always works at the optimal resonant frequency (highest efficiency, no tube burnout). The controller 12 controls the power tube to turn on and off quickly. The appropriate temperature can be manually adjusted by the knob on the control box according to the ambient temperature, or it can be automatically controlled by the temperature sensor 13 on the top. The temperature inside the air pipe head is maintained at the lowest temperature to save energy. The temperature control detected by the temperature sensor 13 can also be sent to the ship monitoring system to monitor the internal temperature of the air pipe head in real time and realize remote temperature control.

[0036] This solution is primarily designed for ships operating in low-temperature or frigid environments. It prevents the stainless steel float 9, top sealing ring 14, and side filter 15 inside the air duct from freezing and becoming stuck, thus preventing ventilation failure, seawater backflow into the cabin, and capsizing. In this solution, an electromagnetic coil 11, similar to that induction cooker, is installed inside the air duct. The intermediate conduit 401 and float of the air duct are made of steel. When high-frequency alternating current is applied to the electromagnetic coil 11, it heats up due to the eddy current effect. This changes the traditional heating method of air ducts, which heats from the outside in, to heating directly inside the air duct, resulting in very high heating efficiency and significant energy savings. This invention reduces the space required for layout. The intermediate duct 401 is made of steel, while the outer cover 1, left duct cover 301, and right duct cover 501 can also be made of metal, facilitating heat transfer. The entire mechanism occupies little space, has very high heating efficiency, and significant energy-saving effect. It also reduces the layout space and enables remote real-time monitoring and remote control of the temperature inside the air pipe head, further improving the level of ship automation. Due to the above structure, this invention has the advantages of simple structure, suitability for marine use in low-temperature sea areas, remote control capability, prevention of air pipe head blockage, prevention of air permeability failure, prevention of seawater backflow into the cabin, and prevention of ship capsizing due to water ingress.

Claims

1. A marine electromagnetic induction heating type air pipe head, comprising an air guide cover, an exhaust port at the bottom of the air guide cover, the exhaust port being connected to an exhaust pipe, characterized in that... A gas-guiding channel runs through the center of the gas-guiding outer cover. The gas-guiding channel includes a left gas-guiding section, a middle gas-guiding section, and a right gas-guiding section. The middle gas-guiding section is located inside the gas-guiding outer cover. The left and right gas-guiding sections extend through the side walls of the gas-guiding outer cover, respectively. An inner gas-guiding hole is provided on the upper surface of the middle gas-guiding section. A gas-guiding cavity is formed between the middle gas-guiding section and the lower, front, rear, and upper gaps of the gas-guiding outer cover. An electromagnetic heating mechanism is provided on the middle gas-guiding section below the inner gas-guiding hole. A guide rod is connected to the middle of the electromagnetic heating mechanism, and a stainless steel float is fitted onto the guide rod. The electromagnetic heating mechanism includes a coil protective shell, an electromagnetic coil, a controller, and a temperature sensor. The temperature sensor is fixed to the gas-guiding outer cover. Electromagnetic coils are arranged inside the coil protective shell. The conductive connectors of the electromagnetic coils extend out of the coil protective shell and connect to conductive wires. The conductive wires are connected to a power module on the controller. The controller is connected to the temperature sensor. The controller is located inside a control box. A manual temperature adjustment knob is installed on the top, and a temperature adjustment module is installed on the controller. The temperature adjustment module is connected to the electromagnetic coil, and the temperature is adjusted through the temperature adjustment module. The coil protective shell is made of Teflon. The edge of the inner air guide hole is connected to the top sealing ring. After the stainless steel float is raised, it seals with the top sealing ring to prevent seawater from entering the pipe head. The left air guide part is a left air guide cover plate, which is connected to the left through hole of the air guide cover by locking bolts. The right air guide part is a right air guide cover plate, which is connected to the right through hole of the air guide cover by locking bolts. The middle air guide part is a middle guide tube, and the two ends of the middle guide tube are connected to the left and right through holes of the air guide cover, respectively, and welded to the inner wall of the air guide cover. The inner air guide hole is located at the top of the middle guide tube. Side filters are installed between the left and right air guide covers and the air guide covers of the air guide cover with the left and right through holes, respectively. The middle guide tube is made of steel and can be heated by the eddy current effect of the electromagnetic coil.

2. The marine electromagnetic induction heating type air pipe head according to claim 1, characterized in that... The height from the top of the guide rod to the upper end of the middle air guide section is less than the height of the stainless steel buoy, which ensures the guidance of the stainless steel buoy while preventing the stainless steel buoy from falling off the guide rod.

3. The marine electromagnetic induction heating type air pipe head according to claim 1, characterized in that... The stainless steel pontoon has a sealing bevel on its top circumference. The top part of the stainless steel pontoon is inserted into the inner air vent through the sealing bevel, and the sealing bevel is pressed and sealed with the top sealing ring.

4. The marine electromagnetic induction heating type air pipe head according to claim 1, characterized in that... The top of the air guide cover is provided with an inspection hole in the middle, and an inspection cover is installed on the inspection hole. The inspection cover is connected to the air guide cover by inspection bolts.

5. A heating method for a marine electromagnetic induction heating type air pipe head as described in claim 1, characterized in that... The heating method steps are as follows: (1) Normal state: The stainless steel float is in a low position, the stainless steel float sits at the bottom of the middle air guide, there is a breathable gap between the stainless steel float and the top sealing ring, the air pipe head is unobstructed, the liquid tank and the empty ship can breathe and breathe freely, the high frequency magnetic field generated by the electromagnetic coil at the bottom of the middle air guide will pass through the bottom of the middle guide tube and the stainless steel float, the bottom of the stainless steel float will generate electromagnetic induction, and the eddy current formed at the bottom of the stainless steel float will generate heat due to the eddy current effect. The heat generated between the bottom of the middle guide tube and the stainless steel float will diffuse into the entire air pipe head, preventing the stainless steel float and the coil protective shell from sticking together due to icing, and also preventing the top sealing ring from being sealed poorly due to icing, and preventing the filter screen on the side of the air pipe head from being frozen and causing poor ventilation. (2) Water inlet state: When seawater enters the pipe head through the left and right air guide covers when the giant waves or the ship capsizes, the stainless steel float rises along the guide rod under buoyancy and fits tightly with the top sealing ring, automatically closing the air guide cavity. The high-frequency magnetic field generated by the electromagnetic coil will pass through the side wall and bottom of the middle guide tube. The middle guide tube will heat up due to the eddy current effect, preventing the seawater inside the air pipe head from generating ice fragments that clog the side filter screen. (3) Recovery state: After the water is discharged, the stainless steel float falls back, the air gap reopens, and the air permeability function is restored. The high-frequency magnetic field generated by the electromagnetic coil will pass through the bottom of the intermediate duct and the stainless steel float. The bottom of the intermediate duct and the stainless steel float will heat up due to the eddy current effect. The heat generated by the bottom of the intermediate duct and the stainless steel float will diffuse into the entire air pipe head, maintaining the normal working state of the air pipe head.

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