Earthquake-resistant heat dissipation chimney structure for large gas carriers

Abstract

The present invention discloses an anti-seismic heat dissipation chimney structure for a large gas transport ship, which relates to the technical field of ship superstructure structures, including a transport hull, a superstructure being arranged on the transport hull, shutters being installed at the air outlet of the chimney, the superstructure including a base building including the chimney, an anti-backflow smoke box being installed at the inner corner of the chimney, a sealing plate being rotatably connected inside the chimney, one end of the sealing plate being supported on the anti-backflow smoke box, and the other end of the sealing plate being connected to a steel rope, and this chimney structure has heat dissipation plates installed on both sides of the chimney, wherein a plurality of anti-seismic grooves are provided on both sides of the chimney, and the anti-seismic grooves are in a concave shape, which can increase the piston resetting speed and reduce the waiting time, and the interference between the positioning rod and the blocking block can cooperate with the torsion spring to realize double locking of the sealing plate, thereby improving the sealing effect of the sealing plate and ensuring to the greatest extent that the smoke will not be discharged to the outside.

Description

Technical Field

[0001] The present invention relates to the technical field of ship infrastructure, in particular to a seismic-resistant heat dissipation chimney structure for a large gas transport ship. Background Art

[0002] Floating production storage and offloading vessels are high-end large-scale marine engineering equipment for exploiting deep-sea oil and gas resources. They can realize the extraction, processing, storage and transportation of offshore oil, natural gas and other energy sources, and are called "offshore oil processing plants."

[0003] A superstructure is an enclosed structure above the upper deck of a ship that extends from one side to the other, or whose side walls are not more than 4% of the ship's breadth set back from the outer plating. If a strict distinction is not made, all enclosed structures above the upper deck can be collectively referred to as superstructures, and sometimes it is also generally referred to as deck buildings including deckhouses.

[0004] A ship's superstructure is the upper structure of the hull, primarily consisting of the bridge, slipway, smokehouse, antennas, and mast. The bridge is the ship's command center, housing the wheelhouse, control consoles, and navigational equipment. The slipway is the upper platform above the hull, primarily used for operations and cargo loading and unloading. The funnel is the exhaust system on a ship, discharging engine exhaust into the air.

[0005] When large merchant ships, cargo ships, and oil storage vessels are on mission and approaching the port state, one of the key inspection items of the inspector is that no light leakage is allowed after the chimney shutters are closed. If light leakage occurs, the ship will be detained for rectification. The movable shutters of existing shutters are easily deformed during transportation, installation and use, resulting in the shutters not closing tightly. Even after closing, light leakage still occurs inside the chimney. To solve this problem, the prior art patent with authorization number CN114084335B discloses a shutter for ship chimneys. The ship chimney in this patented technology has a seismic and heat dissipation structure that is beneficial to the service life of the chimney. At the same time, this patented technology adopts two different driving methods to close the window, an automatic driving device and a manual driving device. The internal window is opened and closed by two hinged cover plates. The upper cover plate is controlled by a cylinder and a rope. When the upper cover plate moves, it drives the lower end cover plate to move. The two cover plates are connected by a connecting rod assembly, in which the connecting rod is composed of a spring, an upper connecting rod and a lower connecting rod. The overall structure The cylinder is placed in the inner window, and its description and drawing structure illustrate that it is placed inside the chimney. The cylinder body is easily damaged during normal exhaust from the chimney. In reality, the exhaust temperature of ships is generally 400℃. Even with the addition of a cooling system, the temperature is still around 150℃. The operating condition of the cylinder is below 120℃. The gas in the cylinder expands due to heat, which makes it easy for the piston rod to move, resulting in the inability to close the window tightly. Therefore, the same problem will occur whether a cylinder or a hydraulic cylinder is used. When the cylinder is damaged or cannot be used, a manual drive method will be used. Since the spring is directly connected to the lower connecting rod in this solution and is exposed to the inner window, the spring not only expands due to heat and changes in the compressed position, but also easily forms carbon deposits between the lower connecting rod and the upper connecting rod, thus limiting the optimal use of the spring. When the rope pulls the upper cover to make it move, it will also cause the lower cover to return abnormally. The excessive redundant structure in this technology limits the operating conditions and is not conducive to long-term use under high temperature. To this end, we propose a seismic-resistant heat dissipation chimney structure for large gas tankers. Summary of the Invention

[0006] The object of the present invention is to provide a seismic-resistant heat dissipation chimney structure for a large gas carrier to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a seismic-resistant heat dissipation chimney structure for a large gas carrier, comprising a superstructure arranged on a transport hull, the superstructure including a base structure including a chimney, shutters being installed at the chimney air outlet, anti-backflow smoke boxes being installed at the corners inside the chimney, a sealing plate being rotatably connected inside the chimney, one end of the sealing plate being supported on the anti-backflow smoke box, the other end of the sealing plate being connected to a steel rope, a rope outlet bin being opened in the middle of the anti-backflow smoke box, the steel rope passing through the rope outlet bin and extending to the outside of the chimney, an electric telescopic rod being installed on one side of the outside of the chimney A reel is installed on the outside of the chimney next to the top of the electric telescopic rod, and the steel rope is wound on the reel, and one end of the steel rope is connected to a pull ring, and the pull ring is fixedly connected to the electric telescopic rod; both ends of the sealing plate are sleeved with heat insulation covers, and each inner ring of the heat insulation cover is installed with a torsion spring, and both ends of the sealing plate shaft are installed with torsion spring connecting rods, the torsion spring connecting rod is fixedly connected to one end of the torsion spring, and the other end of the torsion spring is fixed to the heat insulation cover, and a gas volume detection device for detecting gas inside the chimney is installed inside the anti-backsmoke box, and the gas volume detection device opens the sealing plate shaft to rotate by thermal expansion.

[0008] Preferably, the outer ring of the steel rope wound on the reel is connected to the reel, a fixing pin is installed on the outer bottom of the chimney, one end of the reel is connected to a lifting ring, and the fixing pin and the lifting ring are clamped.

[0009] Preferably, the gas volume detection device includes heat-conducting blocks installed inside both sides of the anti-backsmoke box, pistons are slidably installed on the heat-conducting blocks, sliders are slidably installed at both ends of the anti-backsmoke box, a positioning rod is fixedly installed on each of the sliders, and blocking blocks are fixedly installed at both ends of the sealing plate, and the positioning rods slide and contact the blocking blocks through the sliding of the sliders.

[0010] Preferably, a plurality of anti-seismic grooves are provided on both sides of the top of the chimney, a plurality of vibration plates are installed in each of the anti-seismic grooves, a heat sink is fixedly installed on the anti-seismic groove, a plurality of heat dissipation holes are provided on the heat sink, and the heat dissipation holes distributed in a plurality of vertical columns correspond to the position of each anti-seismic groove.

[0011] Preferably, drainage grooves are provided at the bottom of each of the seismic-resistant grooves on both sides of the outside of the chimney, and the distance between the heat dissipation plate and the drainage grooves does not exceed 100 mm.

[0012] Preferably, silencers are installed on both sides of the chimney, a plurality of through holes are opened on the silencers, a plurality of range-reducing plates are installed between the silencers and the chimney, and each of the range-reducing plates is distributed beside each through hole, corresponding horizontally to the plurality of shutters.

[0013] Preferably, a ladder is installed on the other side of the outside of the chimney, a drainage channel is opened in the middle of the anti-backflow smoke box and is connected to the rope outlet bin, a one-way valve is installed on the drainage channel, and a cleaning brush is installed inside the anti-backflow smoke box, the cleaning brush is in contact with the steel rope and is connected to the rope outlet bin.

[0014] Preferably, both ends of the sealing plate are provided with limiting grooves, each of the heat insulation covers is fixedly mounted with a protrusion at one end facing the sealing plate, the protrusion is slidably connected to the limiting groove, and the heat insulation cover is fixedly connected to the chimney.

[0015] Preferably, the space between the heat conducting block and the piston is filled with an expansion liquid material.

[0016] Preferably, the rotation angle of the sealing plate is 80°, and multiple cavity sections are opened at both ends of the sealing plate. A spring is installed inside each of the cavity sections, one end of the spring is connected to the insulation cotton, and a rubber rod is installed at one end of the multiple insulation cottons.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention installs a rotatable sealing plate inside the chimney. When the sealing plate is statically stopped inside the chimney, it seals the chimney window. When the boiler inside the transport ship starts to operate, exhaust is discharged into the chimney, and the high-temperature hot gas is supplied to the heat-conducting block. The heat-conducting block transfers heat to the piston to move upward, causing the slider to move. The slider moves upward along the anti-backflow smoke box to separate the positioning rod and the blocking block, so that the electric telescopic rod can pull the steel rope from the reel to rotate the sealing plate, opening the exhaust space inside the chimney. When the internal boiler stops working, the hot gas is no longer discharged, the piston gradually resets, and the torsion spring quickly resets the sealing plate to block the air outlet. The torsion spring is located in the heat insulation cover, which is located on both sides of the chimney and in contact with the outside world. It will not generate huge heat to damage the torsion spring, thereby improving the service life of the device and being simple to operate.

[0019] 2. The present invention installs heat dissipation plates on both sides of the chimney, wherein a plurality of anti-seismic grooves are provided on both sides of the chimney. The anti-seismic grooves are in a concave shape, and there is redundant space inside the anti-seismic grooves, which can better circulate air and better exchange heat through the heat dissipation holes. The heat conduction block can reduce the cooling time, increase the piston reset speed, and reduce the waiting time. The positioning rod and the blocking block can be used to interfere with each other and cooperate with the torsion spring to achieve double locking of the sealing plate, thereby improving the sealing effect of the sealing plate and ensuring that the smoke is not discharged to the outside to the greatest extent.

[0020] 3. The present invention installs silencers on both sides of the chimney. When the ship is in use, the smoke discharged from the chimney generates noise. The smoke enters the penetration hole and then offsets the sound waves with the range-reducing plates to generate a certain sound wave. The range-reducing plates absorb the sound waves and rebound them back into the chimney, reducing noise pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the chimney structure of the present invention;

[0023] Figure 3 This is a structural schematic diagram of the chimney of the present invention from another perspective;

[0024] Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 5 For the present invention Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 6 This is a schematic diagram of the external structure of the chimney top of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of both sides of the interior of the chimney of the present invention;

[0028] Figure 8 This is a schematic diagram of the interior of the chimney of the present invention;

[0029] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at C in the middle;

[0030] Figure 10 This is a schematic diagram of the internal structure of the smoke backflow prevention box of the present invention;

[0031] Figure 11 This is a schematic diagram of the connection structure at both ends of the sealing plate of the present invention;

[0032] Figure 12 Schematic diagram of the internal structure of the sealing plate of the present invention

[0033] Figure 13 For the present invention Figure 12 Schematic diagram of the enlarged structure at point D in the middle.

[0034] In the figure: 1- transport hull; 2- superstructure; 3- chimney; 301- seismic trough; 302- vibration plate; 4- shutter; 5- heat dissipation plate; 6- heat dissipation hole; 7- drainage trough; 9- reel; 10- pull rope; 11- electric telescopic rod; 12- pull ring; 13- ladder; 14- fixing pin; 15- silencer; 16- sealing plate; 1601- heat insulation cotton; 1602- rubber rod; 1603- spring; 17- pitch reduction plate; 18- penetration hole; 19- anti-smoke backflow box; 20- drainage channel; 21- positioning rod; 22- rope outlet bin; 23- cleaning brush; 24- slider; 25- heat conduction block; 26- piston; 27- heat insulation cover; 28- blocking block; 29- torsion spring; 30- torsion spring connecting rod. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figure 1-13 The present invention provides a technical solution: a seismic heat dissipation chimney structure for a large gas carrier, comprising a superstructure 2 arranged on a transport hull 1, a shutter 4 being installed at the air outlet of the chimney 3, the superstructure 2 including the base building including the chimney 3, an anti-backflow smoke box 19 being installed at the internal corner of the chimney 3, a sealing plate 16 being rotatably connected inside the chimney 3, one end of the sealing plate 16 being supported on the anti-backflow smoke box 19, the other end of the sealing plate 16 being connected to a steel rope, a rope outlet bin 22 being opened in the middle of the anti-backflow smoke box 19, the steel rope passing through the rope outlet bin 22 and extending to the outside of the chimney 3, an electric telescopic rod 11 being installed on one side of the outside of the chimney 3, the outside of the chimney 3 being electrically A reel 9 is installed next to the top of the telescopic rod 11, and the steel rope is coiled on the reel 9. One end of the steel rope is connected to a pull ring 12, and the pull ring 12 is fixedly connected to the electric telescopic rod 11. The shutter 4 is retained first because the shutter 4 can make the chimney 3 ventilated and rainproof at the same time. The anti-backflow smoke box 19 is fixedly welded to the inside of the chimney 3. When the ship needs to travel, the output rod of the electric telescopic rod 11 is manually controlled to descend in the background, and the pull ring 12 is lowered. The pull ring 12 drives the reel 9 to rotate in the opposite direction, and the steel rope slides inside the rope outlet bin 22, rotating the sealing plate 16 about 80 degrees along the axis. At this time, the sealing plate 16 opens the chimney 3 channel, allowing the smoke to be discharged to the outside of the chimney 3.

[0037] Among them, the hull of a large floating production storage and offloading vessel can be selected from the following Figure 1The transport hull 1 shown, whose superstructure 2 also includes a chimney 3, is usually an M350 FPSO ship with a total length of 364 meters, a molded width of 64 meters, a molded depth of 33 meters, a designed draft of 22.65 meters, a displacement of more than 460,000 tons, a deck area of ​​17,400 square meters, equivalent to 3 standard football fields, and can process 220,000 barrels of crude oil per day. It is equivalent to a land oil and gas processing plant covering an area of ​​10 square kilometers, with a design life of more than 30 years and can withstand hurricane attacks. It can be maintained without docking for 30 years, minimizing maintenance costs. For the first time, a variety of new materials such as ultra-strong carbon steel and improved fiberglass are used in the production of pipelines for offshore floating storage vessels. Among them, the pipelines and channel parts used in the present invention can be made of ultra-strong carbon steel to increase service life and reduce the number of maintenance times.

[0038] When the ship needs to dock, the anchor is thrown out, the engine is turned off, and a small amount of residual smoke is on the chimney 3. Then, the output rod of the electric telescopic rod 11 is manually controlled to rise in the background, and the pull ring 12 is raised. The pull ring 12 drives the reel 9 to rotate, and the steel rope slides inside the rope outlet bin 22, so that the sealing plate 16 can be reset, and the exhaust port of the chimney 3 is blocked to prevent light leakage.

[0039] Both ends of the sealing plate 16 are sleeved with heat insulation covers 27, and the inner ring of each heat insulation cover 27 is installed with a torsion spring 29. Both ends of the sealing plate 16 shaft are installed with torsion spring connecting rods 30, and the torsion spring connecting rod 30 is fixedly connected to one end of the torsion spring 29, and the other end of the torsion spring 29 is fixed to the heat insulation cover 27. A gas volume detection device for detecting the gas inside the chimney 3 is installed inside the anti-backsmoke box 19. The gas volume detection device opens the sealing plate 16 shaft to rotate by thermal expansion. When the sealing plate 16 rotates, the torsion spring connecting rod 30 and the sealing plate 16 shaft rotate synchronously, causing the end of the torsion spring 29 to rotate, and a self-rotating tightening force is generated during the rotation of the end of the torsion spring 29. In summary, when the torsion spring 29 rotates, the pull ring 12 is pulled down by the electric telescopic rod 11, thereby making the sealing plate One end of 16 is pulled by the steel rope to produce a rotation process. When the output piston of the electric telescopic rod 11 retracts to the extreme value, the torsion spring 29 is maximized and the rotation angle of the sealing plate 16 is maximized. Therefore, when selecting the torsion spring 29 and the electric telescopic rod 11, attention should be paid to adaptability. When it is necessary to close the chimney 3 window, the output piston of the electric telescopic rod 11 rises, and the torsion spring 29 also provides initial elastic force to assist the sealing plate 16 to reset. In order to enable the sealing plate 16 to produce a better sealing effect, an air volume detection device is used. When the ship engine stops running, there is no obvious smoke discharge in the chimney 3, and the air volume detection device is reset to support the axial end of the sealing plate 16, thereby preventing one end of the sealing plate 16 from generating a long-term load on the torsion spring 29 due to gravity. Under long-term use, the torsion spring 29 is easily deformed, causing light leakage.

[0040] Among them, multiple cavity sections are opened at both ends of the sealing plate 16, and a spring 1603 is installed inside each of the cavity sections. One end of the spring 1603 is connected to the thermal insulation cotton 1601, and a rubber rod 1602 is installed at the common end of the multiple thermal insulation cottons 1601. The process of opening and closing the sealing plate 16 multiple times will cause certain wear and tear on both ends of the sealing plate 16. Therefore, the method of Example 2 is used to improve both ends of the sealing plate 16. Technical indicators: thermal insulation paint is applied all around the inside of the cavity section to maximize the use of the spring 1603. When the rubber rod 1602 is used multiple times or is subjected to long-term heat expansion and surface wear, the spring 1603 can drive the thermal insulation cotton 1601 forward along the cavity section when the rubber rod 1602 is separated from the inner wall of the chimney 3 to supplement the wear and tear of the thermal insulation cotton 1601, thereby achieving a good sealing effect.

[0041] Furthermore, when the power on the ship is cut off, the outer ring of the steel rope wound on the reel 9 is connected to the reel 10, and a fixing pin 14 is installed at the bottom of the outside of the chimney 3. One end of the reel 10 is connected to a lifting ring, and the fixing pin 14 and the lifting ring are clamped together. The lifting ring at the bottom of the reel 10 can be manually pulled to connect the lifting ring to the fixing pin 14. The sealing plate 16 has the same effect.

[0042] Specifically, the gas volume detection device includes a heat-conducting block 25 installed inside both sides of the anti-backflow smoke box 19, a piston 26 is slidably installed on the heat-conducting block 25, and sliders 24 are slidably installed at both ends of the anti-backflow smoke box 19. A positioning rod 21 is fixedly installed on each of the sliders 24. Stop blocks 28 are fixedly installed at both ends of the sealing plate 16, and the positioning rod 21 slides through the slider 24 and contacts the stop block 28; limiting grooves are provided at both ends of the sealing plate 16, and each of the heat insulation cover 27 is fixedly installed with a protrusion at one end facing the sealing plate 16, and the protrusion is slidably connected to the limiting groove, and the heat insulation cover 27 is fixedly connected to the chimney 3 (between the heat-conducting block 25 and the piston 26 Filled with expansion liquid material), when the ship runs the engine, exhaust will inevitably occur in the chimney 3, and then high-temperature gas will enter through the bottom of the anti-backflow smoke box 19, and the heat conduction block 25 will transfer the heat to the expansion liquid material. The expansion liquid material boils and compresses the air to expand, squeezing the piston 26 to rise, so that the slider 24 slides at both ends of the anti-backflow smoke box 19, and after sliding, drives the positioning rod 21 to rise, and the positioning rod 21 and the blocking block 28 are separated, so that the steel rope can pull the sealing plate 16 to rotate. On the contrary, when the expansion liquid material cools down, the piston 26 is reset, the slider 24 is reset, and the sealing plate 16 is reset by the torsion spring 29, and the positioning rod 21 is again against the blocking block 28.

[0043] The chimney 3 is provided with a plurality of anti-seismic grooves 301 on both sides of the top, and a plurality of vibration plates 302 are installed in each of the anti-seismic grooves 301. A heat sink 5 is fixedly installed on the anti-seismic grooves 301. One end of the plurality of vibration plates 302 is fixed to the heat sink 5 by spot welding. When one end of the vibration plate 302 is vibrated, the other end can shake on the heat sink 5. The heat sink 5 is provided with a plurality of heat dissipation holes 6, and the heat dissipation holes 6 distributed in a plurality of vertical columns correspond to the position of each anti-seismic groove 301. The plurality of anti-seismic grooves 301 make the chimney 3 form a longitudinal skeleton with better strength. Since the longitudinal openings are arranged densely, the stability of the plate is better, the thickness of the plate can be reduced, and the weight of the structure can be reduced. The heat sink 5 can exchange heat from the top of the chimney 3 through the heat dissipation holes 6. The vibration plate 302 can be struck on the heat sink 5 after the chimney 3 has been used for a period of time. The vibration plate 302 can be shaken and will not be deformed when struck during vibration, thereby shaking the smoke dust inside the chimney 3 to the bottom of the chimney 3.

[0044] Drainage grooves 7 are provided at the bottom of each anti-seismic groove 301 on both sides of the outside of the chimney 3, and the distance between the heat dissipation plate 5 and the drainage groove 7 does not exceed 100 mm. The drainage grooves 7 are convenient for draining the water inside the anti-seismic groove 301 when it rains to prevent water accumulation.

[0045] Furthermore, silencers 15 are installed on both sides of the chimney 3, and a plurality of through holes 18 are opened on the silencer 15. A plurality of range-reducing plates 17 are installed between the silencer 15 and the chimney 3, and each of the range-reducing plates 17 is distributed beside each through hole 18, corresponding horizontally to the plurality of the shutters 4. When the ship is in use, the smoke discharged from the chimney 3 generates noise, and the smoke enters the through holes 18, and then offsets the range-reducing plates 17 to generate a certain sound wave. The range-reducing plates 17 absorb the sound wave and rebound it back into the chimney 3, thereby reducing noise pollution.

[0046] A ladder 13 is installed on the other side of the chimney 3. A drainage channel 20 is opened in the middle of the anti-backflow box 19 and is connected to the rope outlet bin 22. A one-way valve is installed on the drainage channel 20. A cleaning brush 23 is installed inside the anti-backflow box 19. The cleaning brush 23 contacts the steel rope and is connected to the rope outlet bin 22. The ladder 13 facilitates manual handling of internal and external affairs of the chimney 3. A one-way valve is installed on the drainage channel 20 to prevent gas from being drained to the outside. The cleaning brush 23 helps to keep the surface of the steel rope clean. The rope outlet bin 22 matches the diameter of the steel rope to prevent smoke and dust from flowing back.

[0047] The chimney 3 adopts a two-section fixed structure fastened with threads in the middle. Various components can be pre-installed in the upper chimney 3 structure, which is convenient for modification when replacement and maintenance are needed.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A seismic-resistant heat dissipation chimney structure for a large gas carrier, comprising a superstructure (2) disposed on a carrier hull (1), wherein the superstructure (2) is a base structure including a chimney (3), and a shutter (4) is installed at an air outlet of the chimney (3), characterized in that: An anti-backflow box (19) is installed at the inner corner of the chimney (3), and a sealing plate (16) is rotatably connected inside the chimney (3). One end of the sealing plate (16) is supported on the anti-backflow box (19), and the other end of the sealing plate (16) is connected to a steel rope. A rope outlet bin (22) is opened in the middle of the anti-backflow box (19), and the steel rope passes through the rope outlet bin (22) and extends to the outside of the chimney (3). An electric telescopic rod (11) is installed on one side of the outside of the chimney (3), and a reel (9) is installed on the outside of the chimney (3) next to the top of the electric telescopic rod (11). The steel rope is wound on the reel (9), and one end of the steel rope is connected to a pull ring (12), and the pull ring (12) and the electric telescopic rod (11) are fixedly connected; Both ends of the sealing plate (16) are sleeved with heat shields (27), and the inner ring of each heat shield (27) is installed with a torsion spring (29). Both ends of the sealing plate (16) shaft are installed with torsion spring connecting rods (30), and the torsion spring connecting rod (30) is fixedly connected to one end of the torsion spring (29), and the other end of the torsion spring (29) is fixed to the heat shield (27). A gas volume detection device for detecting gas inside the chimney (3) is installed inside the anti-backflow smoke box (19), and the gas volume detection device opens the sealing plate (16) shaft to rotate by thermal expansion; The gas volume detection device comprises a heat conduction block (25) installed inside both sides of the anti-backsmoke box (19), a piston (26) is slidably installed on the heat conduction block (25), an expansion liquid material is filled between the heat conduction block (25) and the piston (26), a slider (24) is slidably installed at both ends of the anti-backsmoke box (19), a positioning rod (21) is fixedly installed on each slider (24), and a blocking block (28) is fixedly installed at both ends of the sealing plate (16), and the positioning rod (21) slides through the slider (24) and contacts the blocking block (28); when the heat conduction block ( 25) When heat is transferred to the expanding liquid material, the expanding liquid material boils and compresses the air to expand, which squeezes the piston (26) upward, causing the slider (24) to slide at both ends of the anti-backsmoke box (19), and after sliding, drives the positioning rod (21) to rise, and the positioning rod (21) and the blocking block (28) are separated, so that the steel rope can pull the sealing plate (16) to rotate. Conversely, when the expanding liquid material cools down, the piston (26) is reset, the slider (24) is reset, and the sealing plate (16) is reset under the drive of the torsion spring (29), and the positioning rod (21) is again against the blocking block (28).

2. The large gas carrier seismic-resistant heat dissipation chimney structure according to claim 1 is characterized in that: The outer ring of the steel rope wound on the reel (9) is connected to a draw rope (10), a fixing pin (14) is installed on the outer bottom of the chimney (3), one end of the draw rope (10) is connected to a lifting ring, and the fixing pin (14) and the lifting ring are clamped.

3. The large gas carrier seismic-resistant heat dissipation chimney structure according to claim 1, characterized in that: A plurality of anti-seismic grooves (301) are provided on both sides of the top of the chimney (3), a plurality of vibration plates (302) are installed in each of the anti-seismic grooves (301), a heat dissipation plate (5) is fixedly installed on the anti-seismic groove (301), a plurality of heat dissipation holes (6) are provided on the heat dissipation plate (5), and the plurality of heat dissipation holes (6) distributed in vertical rows correspond to the position of each anti-seismic groove (301).

4. The large gas carrier seismic-resistant heat dissipation chimney structure according to claim 3 is characterized by: Drainage grooves (7) are provided at the bottom of each anti-seismic groove (301) on both sides of the outside of the chimney (3), and the distance between the heat dissipation plate (5) and the drainage grooves (7) does not exceed 100 mm.

5. The large gas carrier seismic-resistant heat dissipation chimney structure according to claim 1, characterized in that: A sound-absorbing plate (15) is installed on both sides of the chimney (3), and a plurality of through holes (18) are opened on the sound-absorbing plate (15). A plurality of sound-reducing plates (17) are installed between the sound-absorbing plate (15) and the chimney (3), and each of the sound-reducing plates (17) is distributed beside each through hole (18) and corresponds horizontally to the plurality of shutters (4).

6. The large gas carrier earthquake-resistant heat dissipation chimney structure according to claim 1, characterized in that: A ladder (13) is installed on the other side of the chimney (3). A drainage channel (20) is opened in the middle of the anti-backflow box (19) and is connected to the rope outlet bin (22). A one-way valve is installed on the drainage channel (20). A cleaning brush (23) is installed inside the anti-backflow box (19). The cleaning brush (23) contacts the steel rope and is connected to the rope outlet bin (22).

7. The large gas carrier seismic-resistant heat dissipation chimney structure according to claim 1, characterized in that: Both ends of the sealing plate (16) are provided with limiting grooves, and each heat insulation cover (27) is fixedly mounted with a protrusion at one end facing the sealing plate (16), the protrusion and the limiting groove are slidably connected, and the heat insulation cover (27) and the chimney (3) are fixedly connected.

8. The large gas carrier seismic-resistant heat dissipation chimney structure according to claim 1, characterized in that: The sealing plate (16) has a rotation angle of 80°. A plurality of cavity sections are provided at both ends of the sealing plate (16). A spring (1603) is installed inside each cavity section. One end of the spring (1603) is connected to the heat insulation cotton (1601). A rubber rod (1602) is installed at a common end of the plurality of heat insulation cottons (1601).

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