Natural gas cold energy recovery power generation system

Abstract

The invention discloses a natural gas cold energy recovery power generation system, and belongs to the field of power generation, the natural gas cold energy recovery power generation system comprises a metal mounting frame, the inner surface of the metal mounting frame is fixedly connected with a heat exchange tube, the metal mounting frame is filled with copper powder, and the two sides of the metal mounting frame are fixedly connected with thermoelectric elements. The sides, away from each other, of the two thermoelectric elements are fixedly connected with heating bins, the middle positions of the sides, away from each other, of the two thermoelectric elements are fixedly connected with heat conducting pieces, and the tops of the interiors of the two heating bins are sleeved with sealing covers. The stirring blades can horizontally rotate and swing up and down at the same time, the fixed height of the stirring blades during stirring is changed, the stirring range of the stirring blades can be widened, heat generated by a heating rod can be rapidly transmitted to a heat conducting piece, the water temperature in a heating bin is more uniform, and the heating efficiency is improved. And the problem of low power generation efficiency caused by too low water temperature at the heat-conducting fins can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of power generation, and more specifically, to a natural gas cold energy recovery power generation system. Background Technology

[0002] Traditional power generation technologies not only consume a lot of energy but also cause significant environmental damage. The emergence and application of thermoelectric power generation technology has effectively solved this problem. By recovering and utilizing heat, thermoelectric power generation can be achieved. Thermoelectric power generation relies on the Peltier effect, which is often used in CPU heat sinks and semiconductor cooling chips in miniature refrigerators. Normally, when we apply current to the cooling chip, one side will heat up and the other side will cool down. However, this effect can also be reversed; as long as there is a temperature difference between the two ends of the cooling chip, voltage will be generated.

[0003] Current thermoelectric generators have slow temperature conduction speeds, which prevents them from achieving high efficiency. Furthermore, they rely solely on cooling water for cooling, which eventually heats up, reducing power generation efficiency and causing temperature instability. This results in unstable power generation or even power outages, making it impossible to generate electricity continuously and efficiently. Thermoelectric power generation technology has become a focal point in the current energy conservation field, and its application is of profound significance for my country's efforts to achieve energy conservation and environmental protection.

[0004] Chinese Patent Application No. CN116488510A discloses a thermoelectric generator tube and a thermoelectric generator device equipped with the generator tube. The invention provides a heating wire, a heating plate, an active rotating shaft, and an output tube. The heating wire generates heat, and the heating plate conducts the heat to a liquid mercury-tin-lead alloy. Alternatively, high-temperature waste liquid can be added to heat the liquid mercury-tin-lead alloy. A drive motor drives the stirring blades on the active rotating shaft to rotate, and a belt drives the stirring blades on the driven rotating shaft to rotate, making the temperature of the liquid mercury-tin-lead alloy uniform. Multiple temperature conduction blocks quickly conduct the low temperature to the cold end of the thermoelectric generator element, achieving high-efficiency power generation and solving the problem of low power generation efficiency.

[0005] In order to enable the heat in the liquid to be transferred quickly through the heat-conducting fins, the existing technology adds stirring blades to stir the liquid and make the liquid temperature uniform. However, when stirring, the stirring blades can only stir at a fixed height position, which means that the water temperature in the height position that is not stirred cannot be quickly agitated, and the overall temperature of the liquid cannot be evenly distributed more quickly. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this invention is to provide a natural gas cold energy recovery power generation system.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A natural gas cold energy recovery power generation system includes a metal mounting frame, a heat exchange tube fixedly connected to the inner surface of the metal mounting frame, copper powder filling the interior of the metal mounting frame, thermoelectric elements fixedly connected to both sides of the metal mounting frame, a heating chamber fixedly connected to the side of each of the two thermoelectric elements that are far apart from each other, a heat-conducting plate fixedly connected to the middle position of the side of each of the two thermoelectric elements that are far apart from each other, a sealing cover fitted on the top of the interior of the two heating chambers, a heating rod fixedly connected to both ends of the interior of the two heating chambers, a connecting mechanism fixedly connected to both ends of the heat exchange tube, and a stirring mechanism fixedly connected to the inner surface of the heating chamber.

[0009] The stirring mechanism includes a fixed plate fixed to the inner surface of the heating chamber and two triangular blocks fixed to the bottom of the heating chamber. A motor base is fixedly connected to the middle position of one side of the top of the fixed plate. A drive motor is fixedly connected to the bottom of the motor base. A first gear is fixedly connected to the output end of the drive motor. A timing belt is sleeved on the outer side of the first gear. A stirring shaft is fixedly connected to the bottom of the first gear. A sliding groove is symmetrically opened on the outer surface of the stirring shaft. A strip-shaped slider is slidably connected inside the sliding groove. A stirring blade is fixedly connected to the side of the two strip-shaped sliders that are far apart from each other. A drive rod is fixedly connected to the bottom of the side of the two strip-shaped sliders that are far apart from each other. A descaling mechanism is rotatably connected to the top of the fixed plate that is far away from the motor base.

[0010] Furthermore, the stirring shaft is located below the fixed plate, and the stirring shaft and the fixed plate are connected to each other by bearings.

[0011] Furthermore, the descaling mechanism includes a second gear rotatably connected to one side of the top of the fixed plate and a feeding mechanism fixedly connected to both ends of the bottom of the fixed plate. The second gear and the first gear are fitted with a synchronous belt on their outer sides. A metal turntable is fixedly connected to the bottom of the second gear. A cylindrical protrusion is slidably connected to one side of the top of the metal turntable. Magnets are fixedly connected to the top and bottom of the cylindrical protrusion. A slide rail is fitted to the outer side of the cylindrical protrusion. A scraper is fixedly connected to the bottom of the slide rail. Multiple scraping grooves are evenly opened inside the scraper.

[0012] Furthermore, the feeding mechanism includes a material trough fixed to the bottom of the fixed plate, a feeding port is fixedly connected through and fixed to the top of the material trough, a first one-way valve is fixedly connected to the top of one side of the material trough, a second one-way valve is fixedly connected to the middle position of the bottom of the material trough, a piston cylinder is fixedly connected to the middle position of the side of the material trough away from the first one-way valve, a fixing ring is fixedly connected to one side of the inner surface of the piston cylinder, a first spring is fixedly connected to one side of the fixing ring, a piston is slidably connected inside the piston cylinder, and a piston rod is fixedly connected to the side of the piston away from the first spring.

[0013] Furthermore, the top of the feeding port extends out of the interior of the material container and through the interior of the fixed plate, and a rubber stopper is slidably connected to the top of the feeding port.

[0014] Furthermore, the flow direction of the first one-way valve is from the outside to the inside of the material container, while the flow direction of the second one-way valve is from the inside of the material container to the outside.

[0015] Furthermore, the connecting mechanism includes a connecting pipe fixed to one end of the heat exchange tube, a connecting plate fixedly connected to one end of the connecting pipe, four through slots evenly opened at the edge of one end of the connecting plate, a sliding plate slidably connected inside the through slots, a threaded rod threadedly connected inside the sliding plate, a first bevel gear fixedly connected to one end of the back of the four threaded rods, and a driving mechanism slidably connected to the outside of the connecting pipe.

[0016] Furthermore, the driving mechanism includes a rotating sleeve slidably connected to the outside of the connecting pipe, a second bevel gear fixedly connected to the outside of the rotating sleeve, the first bevel gear and the second bevel gear meshing with each other, an annular frame fixedly connected to one end of the back of the second bevel gear, and a fixing mechanism slidably connected to one end of the top of the annular frame.

[0017] Furthermore, the fixing mechanism includes a pull rod slidably connected to the annular frame and an annular rack connecting the outside of the pipe. The bottom of the pull rod is fixedly connected to the rack, and a second spring is sleeved on the outside of the pull rod.

[0018] Furthermore, the fixed rack is arc-shaped, and the teeth of the fixed rack are opposite to the teeth of the annular rack, with the fixed rack and the annular rack meshing with each other.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. This solution incorporates a stirring mechanism that allows the stirring blades to rotate horizontally while simultaneously oscillating up and down. This alters the fixed height of the stirring blades, increasing the stirring range and rapidly transferring the heat generated by the heating rods to the heat-conducting plates. This results in a more uniform water temperature inside the heating chamber, effectively preventing low power generation efficiency caused by excessively low water temperature at the heat-conducting plates.

[0021] 2. This solution incorporates a descaling mechanism, which allows the scraper to continuously oscillate back and forth, wiping and removing scale from the surface of the heat-conducting plate through the scraping groove. This not only removes scale promptly and effectively avoids manual cleaning, but also ensures the thermal conductivity of the heat-conducting plate and prevents scale from affecting power generation efficiency.

[0022] 3. This solution is equipped with a feeding mechanism, which, in conjunction with the slide rail and piston rod, ensures the continuous and automatic addition of acidic reagents to the heating chamber. This acidifies the water inside the heating chamber and softens the scale on the surface of the heat-conducting plates, thereby improving the scraping effect of the scraping groove on removing scale from the surface of the heat-conducting plates.

[0023] 4. This solution incorporates a connection mechanism. By observing the position of the flange threads on the external pipeline, the position of the threaded rods is adjusted to ensure they align with each other. This improves the compatibility of the equipment with the external pipeline and avoids connection problems caused by different flange models.

[0024] 5. This solution, by incorporating a drive mechanism, allows all four first bevel gears to rotate simultaneously while the second bevel gear is rotating, thereby simultaneously rotating all four threaded rods. This significantly reduces the time required to tighten the four threaded rods, shortening the time to one-quarter of the original time and greatly improving installation efficiency.

[0025] 6. This solution, by incorporating a fixing mechanism, can prevent the second bevel gear from rotating, thereby effectively ensuring that no natural gas leaks occur during equipment operation and avoiding serious incidents caused by natural gas leaks. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a side sectional view of the metal mounting frame of the present invention;

[0028] Figure 3 This is a schematic diagram of the heating chamber structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the stirring mechanism of the present invention;

[0030] Figure 5 This is a schematic diagram of the stirring shaft structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the descaling mechanism of the present invention;

[0032] Figure 7 This is a schematic diagram of the feeding mechanism of the present invention;

[0033] Figure 8 This is a schematic diagram of the connection mechanism structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the drive mechanism structure of the present invention;

[0035] Figure 10 This is an overall cross-sectional view of the connecting mechanism of the present invention.

[0036] Explanation of the labels in the diagram:

[0037] 1. Metal mounting frame; 2. Thermoelectric element; 3. Sealing cover; 4. Heating chamber;

[0038] 5. Stirring mechanism; 51. Fixing plate; 52. Motor base; 53. Drive motor; 54. First gear;

[0039] 55. Descaling mechanism; 551. Second gear; 552. Metal turntable; 553. Magnet; 554. Slide rail; 555. Scraper trough; 556. Cylindrical protrusion; 557. Scraper;

[0040] 558. Feeding mechanism; 5581. Material trough; 5582. Feeding port; 5583. First check valve; 5584. Second check valve; 5585. Piston rod; 5586. Retaining ring; 5587. Piston; 5588. First spring; 5589. Piston cylinder;

[0041] 56. Stirring shaft; 57. Slide groove; 58. Stirring blade; 59. Drive rod; 510. Strip slider; 511. Triangular block; 512. Synchronous belt;

[0042] 6. Connecting mechanism; 61. Connecting pipe; 62. Connecting plate; 63. Through groove; 64. Threaded rod; 65. Sliding plate; 66. First bevel gear;

[0043] 67. Drive mechanism; 671. Rotating sleeve; 672. Annular frame;

[0044] 673. Fixing mechanism; 6731. Pull rod; 6732. Fixing rack; 6733. Second spring; 6734. Ring rack;

[0045] 674. Second bevel gear;

[0046] 7. Heat exchange tube; 8. Heating rod; 9. Heat-conducting plate; 10. Copper powder. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] Please see Figures 1 to 10A natural gas cold energy recovery power generation system includes a metal mounting frame 1, a heat exchange tube 7 fixedly connected to the inner surface of the metal mounting frame 1, copper powder 10 filled inside the metal mounting frame 1, thermoelectric elements 2 fixedly connected to both sides of the metal mounting frame 1, a heating chamber 4 fixedly connected to the side of the two thermoelectric elements 2 that are far apart from each other, a heat-conducting plate 9 fixedly connected to the middle position of the side of the two thermoelectric elements 2 that are far apart from each other, a sealing cover 3 fitted on the top inside the two heating chambers 4, a heating rod 8 fixedly connected to both ends inside the two heating chambers 4, a connecting mechanism 6 fixedly connected to both ends of the heat exchange tube 7, and a stirring mechanism 5 fixedly connected to the inner surface of the heating chamber 4.

[0049] like Figure 3 , Figure 4 and Figure 5 As shown, the stirring mechanism 5 includes a fixed plate 51 fixed to the inner surface of the heating chamber 4 and two triangular blocks 511 fixed to the bottom of the heating chamber 4. A motor base 52 is fixedly connected to the middle position of one side of the top of the fixed plate 51. A drive motor 53 is fixedly connected to the bottom of the motor base 52. A first gear 54 is fixedly connected to the output end of the drive motor 53. A timing belt 512 is sleeved on the outer side of the first gear 54. A stirring shaft 56 is fixedly connected to the bottom of the first gear 54. A sliding groove 57 is symmetrically opened on the outer surface of the stirring shaft 56. A strip slider 510 is slidably connected inside the sliding groove 57. A stirring blade 58 is fixedly connected to the side of the two strip sliders 510 that are far apart from each other. A drive rod 59 is fixedly connected to the bottom of the side of the two strip sliders 510 that are far apart from each other. A descaling mechanism 55 is rotatably connected to the top of the fixed plate 51 that is far away from the motor base 52.

[0050] The stirring shaft 56 is located below the fixed plate 51, and the stirring shaft 56 and the fixed plate 51 are connected to each other by bearings.

[0051] In order to enable the heat in the liquid to be transferred quickly through the heat-conducting fins, stirring blades 58 are added to stir the liquid and make the liquid temperature uniform. However, when stirring, stirring blades 58 can only stir at a fixed height position, which means that the water temperature at the height position that is not stirred cannot be quickly agitated, and the overall temperature of the liquid cannot be made uniform more quickly.

[0052] This design incorporates a stirring mechanism 5. When the water inside the heating chamber 4 is heated by the heating rod 8, the drive motor 53 is energized, causing the first gear 54 to rotate. The first gear 54 then drives the stirring shaft 56 to rotate synchronously inside the heating chamber 4. The first gear 54, via the sliding groove 57, simultaneously drives two strip-shaped sliders 510 to rotate. The drive rod 59 and the stirring blade 58 rotate synchronously with the strip-shaped sliders 510. As the two drive rods 59 rotate, they gradually approach the two triangular blocks 511 at the bottom of the heating chamber 4. When the inclined surfaces of the drive rods 59 contact each other, the horizontal height of the drive rods 59 is lifted by the triangular blocks 511, simultaneously driving the stirring shaft 56 to rotate. The strip slider 510 and multiple stirring blades 58 move upwards simultaneously, and the drive rod 59 continues to rotate. When passing the triangular block 511, the drive rod 59 will automatically descend under the action of gravity. The drive rod 59 is driven by the stirring shaft 56 to rotate continuously, move up and down continuously, and repeat the cycle continuously. This causes the stirring blades 58 to swing up and down while rotating horizontally, changing the fixed height of the stirring blades 58 during stirring. This not only increases the stirring range of the stirring blades 58, but also allows the heat generated by the heating rod 8 to be quickly transferred to the heat-conducting plate 9, making the water temperature inside the heating chamber 4 more uniform. This can effectively avoid the problem of low power generation efficiency caused by the water temperature at the heat-conducting plate 9 being too low.

[0053] like Figure 6 As shown, the descaling mechanism 55 includes a second gear 551 rotatably connected to one side of the top of the fixed plate 51 and a feeding mechanism 558 fixedly connected to both ends of the bottom of the fixed plate 51. The second gear 551 and the first gear 54 are fitted with a synchronous belt 512 on their outer sides. A metal turntable 552 is fixedly connected to the bottom of the second gear 551. A cylindrical protrusion 556 is slidably connected to one side of the top of the metal turntable 552. Magnets 553 are fixedly connected to the top and bottom of the cylindrical protrusion 556. A slide rail 554 is fitted to the outer side of the cylindrical protrusion 556. A scraper 557 is fixedly connected to the bottom of the slide rail 554. Multiple scraping grooves 555 are evenly opened inside the scraper 557.

[0054] The above solution can quickly and evenly distribute the water temperature inside the heating chamber 4 by setting up a stirring mechanism 5. However, over time, a large amount of scale will form on the outer surface of the heat-conducting plate 9 due to the elements contained in the water. Scale is a poor conductor, and the scale on the surface of the heat-conducting plate 9 will greatly affect the heat conduction capacity, thereby reducing the power generation efficiency.

[0055] This solution incorporates a descaling mechanism 55. When scale needs to be cleaned from the surface of the heat-conducting plate 9, the cylindrical protrusion 556 is pressed downwards into the slide rail 554. The magnet 553 at the top of the cylindrical protrusion 556 then attracts and fixes itself to the metal turntable 552. The drive motor 53 is then energized, causing the first gear 54 to rotate. Through the synchronous belt 512, the second gear 551 rotates synchronously. The second gear 551 then rotates the metal turntable 552, which in turn causes the cylindrical protrusion 556 to rotate in a circular motion. Since the cylindrical protrusion 556 is inside the slide rail 554, it causes the slide rail 554 to swing left and right within the heating chamber 4, while simultaneously moving back and forth within the slide rail 554. The scraper 557 moves back and forth on the outside of the heat-conducting plate 9, continuously wiping and scraping away the scale on the surface of the heat-conducting plate 9 through the scraping groove 555. This not only removes the scale in a timely manner, effectively avoiding manual cleaning and ensuring the thermal conductivity of the heat-conducting plate 9, but also the oscillation of the scraper 557 further agitates the water inside the heating chamber 4. If the surface of the heat-conducting plate 9 does not need to be cleaned, the cylindrical protrusion 556 can be pulled upwards from inside the slide rail 554, so that the magnet 553 at the bottom of the cylindrical protrusion 556 comes into contact with and is attracted and fixed to the metal turntable 552. This prevents the metal turntable 552 from moving through the slide rail 554 when it rotates, reducing the load on the drive motor 53 and preventing the scraping groove 555 from wearing down the surface of the heat-conducting plate 9.

[0056] like Figure 7 As shown, the feeding mechanism 558 includes a material trough 5581 fixed to the bottom of the fixed plate 51. A feeding port 5582 is fixedly connected through the top of the material trough 5581. A first one-way valve 5583 is fixedly connected to the top of one side of the material trough 5581. A second one-way valve 5584 is fixedly connected to the middle position of the bottom of the material trough 5581. A piston cylinder 5589 is fixedly connected to the middle position of the side of the material trough 5581 away from the first one-way valve 5583. A fixing ring 5586 is fixedly connected to one side of the inner surface of the piston cylinder 5589. A first spring 5588 is fixedly connected to one side of the fixing ring 5586. A piston 5587 is slidably connected inside the piston cylinder 5589. A piston rod 5585 is fixedly connected to the side of the piston 5587 away from the first spring 5588.

[0057] The top of the feeding port 5582 extends out of the interior of the material container 5581 and through the interior of the fixing plate 51. A rubber stopper is slidably connected to the top of the feeding port 5582.

[0058] The first one-way valve 5583 flows from the outside to the inside of the material container 5581, while the second one-way valve 5584 flows from the inside of the material container 5581 to the outside.

[0059] The above solution has a descaling mechanism 55, which can scrape and clean the scale on the surface of the heat-conducting plate 9 to ensure the thermal conductivity of the heat-conducting plate 9. However, the scale is relatively hard and encounters great resistance when scraped through the scraping groove 555. This not only increases the load on the drive motor 53, but also results in poor scraping effect, long scraping time and low efficiency.

[0060] This solution incorporates a feeding mechanism 558. While the scraper 555 cleans the surface of the heat-conducting plate 9, the slide rail 554 continuously swings left and right. The slide rail 554 contacts one end of the piston rod 5585, pushing the piston rod 5585 into the piston cylinder 5589, causing the piston 5587 to move along with it. As the piston 5587 moves, it compresses the first spring 5588. Furthermore, the movement of the piston 5587 displaces the liquid inside the piston cylinder 5589. The material is pushed into the material tank 5581, increasing the pressure inside. This forces the acidic reagent inside the material tank 5581 to flow out through the second one-way valve 5584 into the water inside the heating chamber 4, making the water inside the heating chamber 4 acidic. This softens the scale on the surface of the heat-conducting plate 9, making it easier and more thorough for the scraper 555 to remove the scale, thus improving the scraping efficiency. When the slide rail 554 moves to the right, it intersects with the piston rod 558... When the pistons move away from each other, the first spring 5588 is no longer under the pressure of the piston rod 5585 and the piston 5587. At this time, the first spring 5588 pushes the piston 5587 to the right to return it to its original position. While the piston 5587 moves to the right, it is in a state of extraction from the inside of the material tank 5581. The inside of the material tank 5581 is in a negative pressure state because the height of the material tank 5581 is higher than the height of the water surface. At this time, the outside air enters into the inside of the material tank 5581 in time through the first one-way valve 5583 to replenish it. As the slide rail 554 swings continuously, it continuously compresses the piston rod 5585. The piston 5587 moves back and forth under the action of the first spring 5588 and the piston rod 5585, so that the second one-way valve 5584 continuously discharges liquid and continuously enters air through the first one-way valve 5583. This ensures that acidic reagent is continuously and automatically added to the inside of the heating chamber 4, improving the effect of scraping scale on the surface of the heat-conducting plate 9.

[0061] like Figure 8As shown, the connecting mechanism 6 includes a connecting pipe 61 fixed to one end of the heat exchange tube 7, a connecting plate 62 fixedly connected to one end of the connecting pipe 61, four through slots 63 evenly opened at the edge of one end of the connecting plate 62, a sliding plate 65 slidably connected inside the through slots 63, a threaded rod 64 threadedly connected inside the sliding plate 65, a first bevel gear 66 fixedly connected to one end of the back of the four threaded rods 64, and a driving mechanism 67 slidably connected to the outside of the connecting pipe 61.

[0062] When natural gas is introduced into the heat exchange tube 7, the device needs to be connected to an external pipeline. However, the flanges on the pipeline may be of different models, resulting in different positions of the threaded holes, which makes it impossible to effectively connect the external pipeline to the device.

[0063] This solution incorporates a connecting mechanism 6. When connecting to an external pipeline, the drive mechanism 67 moves along the connecting pipeline 61 away from the connecting plate 62. By observing the position of the flange thread on the external pipeline, the position of the threaded rods 64 is adjusted and aligned. The external pipeline flange is then moved to the connecting plate 62. The sliding plate 65 inside the sliding groove 63 changes the position of the four threaded rods 64, ensuring that the four threaded rods 64 are aligned with the threaded holes. After the flange of the external pipeline is processed and moved closer to the connecting plate 62, all four threaded rods 64 can be inserted into the threaded holes. This improves the compatibility of the equipment with external pipelines and avoids connection problems caused by different flange models.

[0064] like Figure 9 and Figure 10 As shown, the drive mechanism 67 includes a rotating sleeve 671 that is slidably connected to the outside of the connecting pipe 61. A second bevel gear 674 is fixedly connected to the outside of the rotating sleeve 671. The first bevel gear 66 and the second bevel gear 674 mesh with each other. An annular frame 672 is fixedly connected to one end of the back of the second bevel gear 674. A fixing mechanism 673 is slidably connected to one end of the top of the annular frame 672.

[0065] The above solution, by setting up a connecting mechanism 6, can adjust the position of the four threaded rods 64 according to the position of the threaded hole of the external pipe flange. However, when tightening the threaded rods 64, a lot of time and procedures are required, which reduces the efficiency of installation.

[0066] This design incorporates a drive mechanism 67. When the threaded rod 64 needs to be tightened, the second bevel gear 674 is pushed to slide along the outside of the connecting pipe 61 via the rotating sleeve 671, moving closer to the four first bevel gears 66. Since the four threaded rods 64 are inserted into the threaded holes of the external flange, the four first bevel gears 66 are in a relatively fixed state. At this point, the outer side of the second bevel gear 674 gradually contacts and meshes with the outer side of the first bevel gears 66. The second bevel gear 674 can then be rotated, causing the four first bevel gears 66 to move synchronously. The rotation causes the four threaded rods 64 to rotate inside the threaded holes. Under the action of the threads, the threaded rods 64 will move to one side. At this time, the first bevel gear 66 is synchronously fixed. At this time, while rotating the second bevel gear 674, a force needs to be applied in the direction of the first bevel gear 66 to keep the first bevel gear 66 and the second bevel gear 674 in a meshing state, ensuring that the first bevel gear 66 can rotate smoothly and stably. By rotating the four threaded rods 64 at the same time, the time for tightening the four threaded rods 64 can be greatly reduced, shortening the time to one-quarter of the original time, greatly improving the installation efficiency.

[0067] like Figure 9 and Figure 10 As shown, the fixing mechanism 673 includes a pull rod 6731 slidably connected to the annular frame 672 and an annular rack 6734 connected to the outside of the connecting pipe 61. The bottom of the pull rod 6731 is fixedly connected to the fixing rack 6732, and a second spring 6733 is sleeved on the outside of the pull rod 6731.

[0068] The fixed rack 6732 is arc-shaped, and the teeth of the fixed rack 6732 are opposite to the teeth of the ring rack 6734. The fixed rack 6732 and the ring rack 6734 mesh with each other.

[0069] The above solution, by setting a drive mechanism 67, can simultaneously rotate the four first bevel gears 66, which can greatly reduce the time for connecting to external pipelines. However, after installation, the second bevel gear 674 is in a free state and may rotate under the action of external force, causing the four threaded rods 64 to rotate, which reduces the sealing between pipelines and creates a dangerous situation of natural gas leakage.

[0070] This design incorporates a fixing mechanism 673. When the second bevel gear 674 rotates, the pull rod 6731 can be pulled upwards beforehand, causing the fixed rack 6732 to move away from the annular rack 6734, thus releasing the fixing effect on the annular frame 672. At this point, the second bevel gear 674 can rotate. After rotation, by releasing the pull rod 6731, the fixed rack 6732 moves downwards under the elastic force of the second spring 6733, re-engaging with the annular rack 6734 and fixing the second bevel gear 674. This prevents the second bevel gear 674 from rotating. Even if the second bevel gear 674 can slide outside the connecting pipe 61, the annular frame 672 drives the fixed rack 6732 to move synchronously, ensuring that the fixed rack 6732 always slides outside the annular rack 6734 and remains engaged. The second bevel gear 674 can never rotate, effectively preventing natural gas leakage during equipment operation and avoiding serious incidents caused by natural gas leaks.

[0071] Instructions for use: First, connect to the natural gas pipeline through the connecting mechanism 6, and simultaneously rotate the four threaded rods 64 through the driving mechanism 67. After the connection is completed, the second bevel gear 674 is effectively fixed through the fixing mechanism 673, so that natural gas can enter the interior of the heat exchange tube 7.

[0072] Then natural gas is introduced into the heat exchange tube 7. The natural gas quickly cools one side of the thermoelectric element 2 through the heat exchange tube 7 and the copper powder 10. At the same time, the water inside the heating chamber 4 is effectively heated through the heating rod 8. The heat is transferred through the heat conduction plate 9 to heat the other side of the thermoelectric element 2, so that a temperature difference is generated inside the thermoelectric element 2 to generate electricity.

[0073] Finally, the stirring mechanism 5 can quickly and evenly distribute the water inside the heating chamber 4 to ensure smooth power generation. The descaling mechanism 55 can scrape and clean the scale on the surface of the heat-conducting plate 9. The feeding mechanism 558 adds acidic reagent to the water to soften the scale.

[0074] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A natural gas cold energy recovery power generation system, comprising a metal mounting frame (1), wherein a heat exchange tube (7) is fixedly connected to the inner surface of the metal mounting frame (1), the interior of the metal mounting frame (1) is filled with copper powder (10), thermoelectric elements (2) are fixedly connected to both sides of the metal mounting frame (1), a heating chamber (4) is fixedly connected to the side of the two thermoelectric elements (2) that are far apart from each other, a heat-conducting plate (9) is fixedly connected to the middle position of the side of the two thermoelectric elements (2) that are far apart from each other, a sealing cover (3) is fitted on the top of the interior of the two heating chambers (4), and a heating rod (8) is fixedly connected to both ends of the interior of the two heating chambers (4); Its features are: The heat exchange tube (7) is fixedly connected to both ends by a connecting mechanism (6), and the heating chamber (4) is fixedly connected to a stirring mechanism (5); The stirring mechanism (5) includes a fixing plate (51) fixed to the inner surface of the heating chamber (4) and two triangular blocks (511) fixed to the bottom of the heating chamber (4). A motor base (52) is fixedly connected to the middle position of the top side of the fixing plate (51). A drive motor (53) is fixedly connected to the bottom of the motor base (52). A first gear (54) is fixedly connected to the output end of the drive motor (53). A synchronous belt (512) is sleeved on the outer side of the first gear (54). A stirring shaft (56) is fixedly connected to the bottom of the wheel (54). The outer surface of the stirring shaft (56) is symmetrically provided with grooves (57). A strip slider (510) is slidably connected inside the groove (57). A stirring blade (58) is fixedly connected to the side of the two strip sliders (510) that are far apart from each other. A drive rod (59) is fixedly connected to the bottom of the side of the two strip sliders (510) that are far apart from each other. A descaling mechanism (55) is rotatably connected to the top of the fixed plate (51) that is far away from the motor base (52).

2. The natural gas cold energy recovery power generation system according to claim 1, characterized in that: The stirring shaft (56) is located below the fixed plate (51), and the stirring shaft (56) and the fixed plate (51) are connected to each other by bearings.

3. The natural gas cold energy recovery power generation system according to claim 1, characterized in that: The descaling mechanism (55) includes a second gear (551) rotatably connected to one side of the top of the fixed plate (51) and a feeding mechanism (558) fixedly connected to both ends of the bottom of the fixed plate (51). The second gear (551) and the first gear (54) are fitted with a synchronous belt (512). A metal turntable (552) is fixedly connected to the bottom of the second gear (551). A cylindrical protrusion (556) is slidably connected to one side of the top of the metal turntable (552). Magnets (553) are fixedly connected to the top and bottom of the cylindrical protrusion (556). A slide rail (554) is fitted to the outside of the cylindrical protrusion (556). A scraper (557) is fixedly connected to the bottom of the slide rail (554). Multiple scraping grooves (555) are evenly opened inside the scraper (557).

4. A natural gas cold energy recovery power generation system according to claim 3, characterized in that: The feeding mechanism (558) includes a feeding trough (5581) fixed to the bottom of the fixing plate (51). A feeding port (5582) is fixedly connected to the top of the feeding trough (5581). A first one-way valve (5583) is fixedly connected to the top of one side of the feeding trough (5581). A second one-way valve (5584) is fixedly connected to the middle position of the bottom of the feeding trough (5581). The feeding trough (5581) is far away from the first one-way valve (5583). A piston cylinder (5589) is fixedly connected to the middle position on one side of the piston cylinder (5589). A fixing ring (5586) is fixedly connected to one side of the inner surface of the piston cylinder (5589). A first spring (5588) is fixedly connected to one side of the fixing ring (5586). A piston (5587) is slidably connected inside the piston cylinder (5589). A piston rod (5585) is fixedly connected to the side of the piston (5587) away from the first spring (5588).

5. A natural gas cold energy recovery power generation system according to claim 4, characterized in that: The top of the feeding port (5582) extends out of the interior of the material trough (5581) and through the interior of the fixing plate (51), and a rubber stopper is slidably connected to the top of the feeding port (5582).

6. A natural gas cold energy recovery power generation system according to claim 4, characterized in that: The first check valve (5583) flows from the outside to the inside of the material container (5581), and the second check valve (5584) flows from the inside of the material container (5581) to the outside.

7. A natural gas cold energy recovery power generation system according to claim 1, characterized in that: The connecting mechanism (6) includes a connecting pipe (61) fixed to one end of the heat exchange tube (7), a connecting plate (62) fixedly connected to one end of the connecting pipe (61), four through slots (63) evenly opened at the edge of one end of the connecting plate (62), a sliding plate (65) slidably connected inside the through slot (63), a threaded rod (64) threadedly connected inside the sliding plate (65), a first bevel gear (66) fixedly connected to one end of the back of the four threaded rods (64), and a driving mechanism (67) slidably connected to the outside of the connecting pipe (61).

8. A natural gas cold energy recovery power generation system according to claim 7, characterized in that: The drive mechanism (67) includes a rotating sleeve (671) slidably connected to the outside of the connecting pipe (61). A second bevel gear (674) is fixedly connected to the outside of the rotating sleeve (671). The first bevel gear (66) and the second bevel gear (674) mesh with each other. An annular frame (672) is fixedly connected to one end of the back of the second bevel gear (674). A fixing mechanism (673) is slidably connected to one end of the top of the annular frame (672).

9. A natural gas cold energy recovery power generation system according to claim 8, characterized in that: The fixing mechanism (673) includes a pull rod (6731) slidably connected to the annular frame (672) and an annular rack (6734) connecting the outside of the pipe (61). The bottom of the pull rod (6731) is fixedly connected to the fixing rack (6732), and a second spring (6733) is sleeved on the outside of the pull rod (6731).

10. A natural gas cold energy recovery power generation system according to claim 9, characterized in that: The fixed rack (6732) is arc-shaped, and the teeth of the fixed rack (6732) are opposite to the teeth of the ring rack (6734). The fixed rack (6732) and the ring rack (6734) mesh with each other.

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