Liquid ammonia tank car for transporting liquid ammonia

Abstract

The invention discloses a liquid ammonia tank car for transporting liquid ammonia, and relates to the technical field of liquid ammonia tank cars. The liquid ammonia tank car comprises a liquid ammonia tank car body and a protective cylinder, the protective cylinder is fixedly installed on the liquid ammonia tank car body, the protective cylinder is provided with a containing groove used for installing a tank body in a penetrating mode, the protective cylinder is provided with two shielding assemblies, and the protective cylinder is provided with a rotating assembly for driving the two shielding assemblies to slide relatively and a spraying pipeline. The spraying pipeline is rotationally arranged in the containing groove in the protection barrel relative to the tank body, a driving assembly for driving the spraying pipeline to rotate back and forth along the outer wall of the tank body is arranged on the protection barrel, a plurality of infrared thermal imagers with the detection ends facing the tank body are arranged on the spraying pipeline at intervals, and a conveying assembly communicated with the spraying pipeline is arranged on the liquid ammonia tank car body. According to the liquid ammonia diluting device, the leakage condition of liquid ammonia in the tank body can be found in time through cooperation of multiple groups of assemblies, shielding and neutralizing measures are taken, liquid ammonia is diluted, harm to personnel caused by leakage of the liquid ammonia is prevented, and the risk of leakage of the liquid ammonia is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of liquid ammonia tank trucks, and more specifically, relates to a liquid ammonia tank truck for transporting liquid ammonia. Background Art

[0002] Liquid ammonia plays a crucial role in the modern industrial system. In the agricultural field, it is the core raw material for manufacturing nitrogen fertilizers and plays an irreplaceable role in increasing global food production. With the continuous growth of the world's population and the increasing demand for food, the scale of the chemical fertilizer industry has expanded significantly, thereby greatly increasing the demand for liquid ammonia. In the chemical industry, liquid ammonia is widely used in the production of various important chemical products such as nitric acid, soda ash, and nitrogen-containing inorganic salts, and is the basis for the smooth operation of many chemical industry chains. Currently, most liquid ammonia is transported by liquid ammonia tank trucks. However, when the existing liquid ammonia tank trucks transport liquid ammonia, the liquid ammonia solution in the tank is prone to violent shaking, resulting in an increase in temperature and pressure, and is prone to leakage risks.

[0003] Chinese Patent with Patent Publication No. CN220688776U discloses a liquid ammonia tank truck for transporting liquid ammonia. The buffer spring in the buffer assembly of this device can prevent the tank assembly and the liquid ammonia solution inside from vibrating too much during transportation, reduce the shaking of the tank assembly and the liquid ammonia solution inside, and prevent the liquid ammonia solution from violently shaking inside the tank assembly, resulting in leakage and potential dangers caused by an increase in internal temperature and pressure. However, there are still some deficiencies in the use of this device: First, when the tank body leaks liquid ammonia due to external factors, the liquid ammonia in the tank will spray out under pressure, causing pollution and even injury to personnel. Second, when the tank body leaks liquid ammonia, it is not possible to timely dilute the leaked liquid ammonia.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a liquid ammonia tank truck for transporting liquid ammonia, thereby solving the problems raised in the above background art.

[0006] The basic concept of the technical solution adopted by the present invention to solve the above technical problems is: A liquid ammonia tank truck for transporting liquid ammonia, comprising: a liquid ammonia tank truck body, a tank body, and a pressure sensor provided on the tank body, a protective cylinder fixedly installed on the liquid ammonia tank truck body, the protective cylinder is provided with a receiving groove for installing the tank body, and two sets of shielding components that can shield the receiving groove are relatively slidably provided on the protective cylinder along its axis, and a rotating component for driving the two sets of shielding components to relatively slide along the axis of the protective cylinder is provided on the protective cylinder. The shielding component includes a sliding plate, a shielding cloth, and a rubber block. The sliding plate is slidably arranged on the protective cylinder. Two ends of the shielding cloth are respectively fixedly connected to the sliding plate and the protective cylinder. The rubber block is fixedly connected to one end of the sliding plate facing away from the shielding cloth. The protective cylinder is provided with a second chute for the sliding plate to slide. The rotating component is configured to drive the sliding plate to slide along the second chute; A spray pipe is rotatably arranged relative to the tank body in the receiving groove in the protective cylinder. The spray pipe is coaxially arranged with the protective cylinder. A driving component for driving the spray pipe to reciprocally rotate along the outer wall of the tank body is provided on the protective cylinder. A plurality of infrared thermal imagers with detection ends facing the tank body are arranged at intervals on the spray pipe. A conveying component communicated with the spray pipe is provided on the liquid ammonia tank truck body.

[0007] Optionally, a storage cylinder for containing slaked lime powder is fixedly connected to one side of the sliding plate facing the receiving groove. A through hole is provided at one end of the storage cylinder facing the tank body. A first rotating shaft is threadedly connected in the storage cylinder. The first rotating shaft is fixedly connected with a baffle for shielding the through hole through a plurality of connecting rods. One end of the first rotating shaft extends to the outer wall of the storage cylinder and is sleeved with a second gear. A second rotating shaft is rotatably connected to the storage cylinder. A third gear meshing with the second gear is sleeved on the second rotating shaft. A second rack meshing with the third gear is fixedly connected to the inner wall of the protective cylinder. The second rack is coaxially arranged with the second rotating shaft.

[0008] Optionally, at least one limiting protrusion for limiting the baffle to the through hole is fixedly connected to the inner wall of the storage cylinder.

[0009] Optionally, the rotating component includes: Two third rotating shafts are relatively rotatably arranged in the protective cylinder. Driving rods with one end fixedly connected to an installation plate are fixedly connected to both of the two third rotating shafts. The two driving rods are arranged in a staggered manner. The installation plate is of an L-shaped structure. The installation plates on the two driving rods are in the same horizontal plane. The installation plates on the two driving rods are respectively fixedly connected to the sliding plates on the two sets of shielding components. First bevel gears are sleeved on both of the two third rotating shafts; The fourth rotating shaft is rotatably arranged on the protective cylinder. The first end of the fourth rotating shaft extends to the outer wall of the protective cylinder. A second motor for driving the first end of the fourth rotating shaft to rotate is fixedly connected to the protective cylinder. A third bevel gear is sleeved on the second end of the fourth rotating shaft. The fifth rotating shaft is rotatably arranged in the protective cylinder. Second bevel gears meshing with the third bevel gear and two first bevel gears are sleeved at both ends of the fifth rotating shaft.

[0010] Optionally, a first sealing gasket is fixedly connected along the sliding plate in the second chute. The first sealing gasket is fixedly connected to the inside of the protective cylinder and is arranged along the length direction of the second chute. The first sealing gasket is arranged in a fitting manner with the sliding plate and the shielding cloth.

[0011] Optionally, two groove bodies are embedded in the protective cylinder along the sliding plate relatively. The two groove bodies are communicated with the second chute. A plurality of groups of elastic mechanisms are fixedly installed in both of the two groove bodies. The movable end of the elastic structure is fixedly connected with a second sealing gasket that can be in contact with the sliding plate and the shielding plate. The second sealing gasket is arranged along the length direction of the second chute.

[0012] Optionally, the first end of the spray pipeline is slidably arranged on the inner wall of the protective cylinder. A first chute for the spray pipeline to slide is arranged on the protective cylinder. The second end of the spray pipeline extends to the outer wall of the protective cylinder. The driving assembly includes: A first gear is sleeved and fixedly connected to the second end of the spray pipeline. A first rack is slidably arranged on the outer wall of the protective cylinder. The first rack meshes with the first gear. A movable plate is vertically and fixedly connected to the first rack. An activity groove is arranged through the movable plate along its length direction. A Z-shaped rod, the first end of which is movably arranged in the activity groove. A first motor is fixedly connected to the protective cylinder. The driving end of the first motor is fixedly connected to the second end of the Z-shaped rod.

[0013] Optionally, the conveying assembly includes: A water pump is fixedly installed on the liquid ammonia tank truck body. The water inlet end of the water pump is communicated with a water tank fixedly installed on the liquid ammonia tank truck body. The water discharge end of the water pump is communicated with the second end of the spray pipeline through a connecting pipeline. The connecting pipeline and the spray pipeline are communicated through a rotary joint.

[0014] Optionally, partition plates for placing the shielding cloth are fixedly connected to both sides of the protective cylinder relatively.

[0015] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described below at the same time: 1. By providing a rotating assembly, a driving assembly, a conveying assembly, an infrared thermal imager, and an occlusion assembly, the occlusion assembly is used to occlude the receiving groove. At the same time, in cooperation with the spray pipe, the conveying assembly, and the driving assembly, dilution treatment of the liquid ammonia on the tank body is achieved. The overall structure is simple to operate and has a high degree of automation. It can timely detect the leakage of liquid ammonia in the tank body and take occlusion and neutralization measures to achieve dilution treatment of the liquid ammonia, prevent the leakage of liquid ammonia from causing harm to personnel, and reduce the risk of liquid ammonia leakage; 2. By providing a storage cylinder, a first rotating shaft, a baffle, a through port, and a second rack, through the cooperation of the storage cylinder, the through port, and the second rack, when liquid ammonia leaks, the slaked lime powder can react with the liquid ammonia, playing a certain role in emergency treatment and reducing the harm caused by liquid ammonia leakage; 3. By providing an elastic mechanism, a first sealing gasket, and a second sealing gasket, through the settings of the first sealing gasket, the second sealing gasket, and the elastic mechanism, the sealing performance of the protective cylinder is greatly improved, ensuring that external substances can be effectively prevented from entering and internal substances from leaking under various working conditions.

[0016] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Description of the Drawings

[0017] The following drawings in the description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a front view of the present invention; Figure 3 is a schematic diagram of the structure of the protective cylinder of the present invention; Figure 4 is of the present invention Figure 3 an enlarged schematic diagram of part A therein; Figure 5 is a schematic diagram of the internal structure of the protective cylinder of the present invention; Figure 6 is a schematic diagram of the infrared thermal imager and the spray pipe of the present invention; Figure 7 is of the present invention Figure 6 an enlarged schematic diagram of part B therein; Figure 8 is a schematic diagram of the storage cylinder, the first rotating shaft, the second gear, the second rotating shaft, and the third gear of the present invention; Figure 9 Structural schematic diagram of the through port, baffle and connecting rod of the present invention; Figure 10 Structural schematic diagram of the shielding component of the present invention; Figure 11 Structural schematic diagram of the driving rod and mounting plate of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural schematic diagram at position C in; Figure 13 Structural schematic diagram of the first gasket and the second gasket of the present invention.

[0018] In the drawings, the list of components represented by each reference numeral is as follows: 1. Liquid ammonia tank truck body; 2. Protection cylinder; 3. First gasket; 4. Elastic mechanism; 5. Receiving cylinder; 6. Rotating assembly; 61. Driving rod; 62. Mounting plate; 63. First bevel gear; 64. Fifth rotating shaft; 65. Second bevel gear; 66. Third bevel gear; 67. Fourth rotating shaft; 68. Second motor; 69. Third rotating shaft; 7. Shielding assembly; 71. Shielding cloth; 72. Sliding plate; 73. Rubber block; 8. Conveying assembly; 81. Water tank; 82. Water pump; 83. Connecting pipe; 84. Fixed plate; 9. Driving assembly; 91. First motor; 92. Activity groove; 93. Activity plate; 94. Z-shaped rod; 95. First rack; 96. First gear; 10. Partition board; 11. Spraying pipe; 12. Rotary joint; 13. Limiting projection; 14. Tank body; 15. First chute; 16. Infrared thermal imager; 17. Second chute; 18. Second rack; 19. Second gasket; 20. Tank; 21. First rotating shaft; 22. Second gear; 23. Second rotating shaft; 24. Third gear; 25. Connecting rod; 26. Baffle; 27. Through port; 28. Connecting gasket; 29. Pressure sensor; 30. Accommodating groove.

[0019] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0020] Now, the present invention will be further described in detail with reference to the drawings.

[0021] Please refer to Figure 1-13As shown in the figure, in this embodiment, a liquid ammonia tank truck for transporting liquid ammonia is provided, which includes a liquid ammonia tank truck body 1, a tank body 14, and a pressure sensor 29 arranged on the tank body 14. A protective cylinder 2 is fixedly installed on the liquid ammonia tank truck body 1. The protective cylinder 2 is provided with a receiving groove 30 for installing the tank body 14. Two sets of shielding components 7 for shielding the receiving groove 30 are arranged on the protective cylinder 2 to slide relative to each other along its axis. A rotating component 6 for driving the two sets of shielding components 7 to slide relative to each other along the axis of the protective cylinder 2 is arranged on the protective cylinder 2. The shielding component 7 includes a sliding plate 72, a shielding cloth 71, and a rubber block 73. The sliding plate 72 is slidably arranged on the protective cylinder 2. Two ends of the shielding cloth 71 are respectively fixedly connected to the sliding plate 72 and the protective cylinder 2. The rubber block 73 is fixedly connected to one end of the sliding plate 72 facing away from the shielding cloth 71. A second chute 17 for the sliding plate 72 to slide is arranged on the protective cylinder 2. The rotating component 6 is configured to drive the sliding plate 72 to slide along the second chute 17. A spray pipeline 11 is rotatably arranged in the receiving groove 30 in the protective cylinder 2 relative to the tank body 14. The spray pipeline 11 is coaxially arranged with the protective cylinder 2. A driving component 9 for driving the spray pipeline 11 to rotate reciprocally along the outer wall of the tank body 14 is arranged on the protective cylinder 2. A plurality of infrared thermal imagers 16 with detection ends facing the tank body 14 are arranged at intervals on the spray pipeline 11. A conveying component 8 communicated with the spray pipeline 11 is arranged on the liquid ammonia tank truck body 1.

[0022] Specifically, in this embodiment, in the initial state, the shielding component 7 does not shield the receiving groove 30 (for reference, see Figure 5As shown in the figure, the tank body 14 is located inside the receiving groove 30. At the same time, the pressure sensor 29, the rotating assembly 6, the conveying assembly 8, the infrared thermal imager 16, and the driving assembly 9 are all controlled by the control mechanism on the liquid ammonia tank truck body 1. A plurality of drain holes facing the tank body 14 are provided along the length direction of the spray pipeline 11; when it is necessary to cool the tank body 14, water can be conveyed to the spray pipeline 11 through the conveying assembly 8, so that the water is discharged from the drain holes on the spray pipeline 11 to the outer wall of the tank body 14. At the same time, the driving assembly 9 drives the spray pipeline 11 to rotate reciprocally, so that the spray pipeline 11 rotates reciprocally along the outer wall of the tank body 14, enabling the water to be evenly sprayed onto the outer wall of the tank body 14 to achieve the effect of cooling. When liquid ammonia leaks inside the tank body 14, the pressure sensor 29 senses it and sends a signal to the external control mechanism. The external control mechanism controls the rotating assembly 6 to start. The rotating assembly 6 drives the sliding plates 72 of the two shielding assemblies 7 to slide relative to each other in the second sliding groove 17 of the protective cylinder 2, causing the shielding cloth 71 to unfold. When the sliding plates 72 slide to the designated position, the rubber blocks 73 on the two sliding plates 72 fit together, enabling the shielding assembly 7 to shield the receiving groove 30, preventing the liquid ammonia leaked from the tank body 14 from spraying out to the outside and avoiding the situation of personnel being injured. Then, the external control mechanism drives the driving assembly 9 to drive the spray pipeline 11 to rotate reciprocally, and scans the outer wall of the tank body 14 through the infrared thermal imager 16. When liquid ammonia leaks, due to the endothermic vaporization of liquid ammonia, the temperature of the leakage area will be lower than the surrounding environment. The infrared thermal imager 16 forms a thermal image by detecting the thermal radiation difference on the surface of the object, thereby showing the temperature abnormal area and helping to find the liquid ammonia leakage point. When the liquid ammonia leakage point is found, the driving assembly 9 stops operating, so that the drain holes of the spray pipeline 11 face the leakage point of the tank body 14. At this time, the conveying assembly 8 is started through the external control mechanism, so as to convey water into the spray pipeline 11 and spray it from the drain holes to the leakage point of the tank body 14 to achieve the dilution treatment of liquid ammonia. The overall structure is simple to operate and has a high degree of automation. It can timely detect the leakage of liquid ammonia in the tank body 14, and take shielding and neutralization measures to achieve the dilution treatment of liquid ammonia, prevent the leakage of liquid ammonia from causing harm to personnel, and reduce the risk of liquid ammonia leakage.

[0023] It should be noted that in this embodiment, the receiving groove 30 of the protective cylinder 2 has a certain storage space for the storage of liquid ammonia. The shielding cloth 71 can be a thickened PVC waterproof cloth. At the same time, protective measures need to be added when the infrared thermal imager 16 is in use to avoid the situation of its damage. Secondly, in this embodiment, the driving assembly 9 and the rotating assembly 6 are relatively arranged at both ends of the protective cylinder 2.

[0024] In this embodiment, as Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown in the figure, a storage cylinder 5 capable of containing slaked lime powder is fixedly connected to one side of the sliding plate 72 facing the receiving groove 30. A through port 27 is provided through one end of the storage cylinder 5 facing the tank body 14. A first rotating shaft 21 is threadedly connected inside the storage cylinder 5. The first rotating shaft 21 is fixedly connected with a baffle 26 capable of blocking the through port 27 through a plurality of connecting rods 25. One end of the first rotating shaft 21 extends to the outer wall of the storage cylinder 5 and is sleeved with a second gear 22. A second rotating shaft 23 is rotatably connected to the storage cylinder 5. A third gear 24 meshing with the second gear 22 is sleeved on the second rotating shaft 23. A second rack 18 meshing with the third gear 24 is fixedly connected to the inner wall of the protection cylinder 2. The second rack 18 is coaxially arranged with the second rotating shaft 23. Specifically, when the sliding plate 72 moves, the storage cylinder 5 moves accordingly. When the third gear 24 meshes with the second rack 18, the third gear 24 drives the second gear 22 and the second rotating shaft 23 to rotate. The rotation of the first rotating shaft 21 causes the baffle 26 to open the through port 27, and the slaked lime powder can spill out from the through port 27 and successively fall on the outer wall of the tank body 14 as the sliding plate 72 rotates. When liquid ammonia leaks, the slaked lime powder can react with the liquid ammonia, playing a certain role in emergency treatment and reducing the harm caused by liquid ammonia leakage. It should be noted that a filling port and a sealing cover for sealing the filling port are provided on the storage cylinder 5 to facilitate filling slaked lime powder into the storage cylinder 5; further, at least one limiting protrusion 13 for limiting the baffle 26 at the through port 27 is fixedly connected to the inner wall of the storage cylinder 5.

[0025] In this embodiment, as Figure 2 , Figure 6 , Figure 10 , Figure 11 and Figure 12As shown, the rotating assembly 6 includes two third rotating shafts 69, which are relatively rotatably arranged in the protective cylinder 2. Driving rods 61 are fixedly connected to both of the two third rotating shafts 69, and the other ends of the driving rods 61 are fixedly connected to mounting plates 62. The two driving rods 61 are arranged in a staggered manner. The mounting plate 62 has an L-shaped structure. The mounting plates 62 on the two driving rods 61 are in the same horizontal plane. The mounting plates 62 on the two driving rods 61 are respectively fixedly connected to the sliding plates 72 on two groups of shielding assemblies 7. First bevel gears 63 are sleeved on both of the two third rotating shafts 69. A fourth rotating shaft 67 is rotatably arranged on the protective cylinder 2. The first end of the fourth rotating shaft 67 extends to the outer wall of the protective cylinder 2. A second motor 68 for driving the first end of the fourth rotating shaft 67 to rotate is fixedly connected to the protective cylinder 2. A third bevel gear 66 is sleeved on the second end of the fourth rotating shaft 67. A fifth rotating shaft 64 is rotatably arranged in the protective cylinder 2. Second bevel gears 65 that mesh with the third bevel gear 66 and the two first bevel gears 63 are sleeved on both ends of the fifth rotating shaft 64. Specifically, when it is necessary to drive the shielding assembly 7 to move, the second motor 68 is used to drive the fourth rotating shaft 67 to rotate. The third bevel gear 66 on the fourth rotating shaft 67 drives the second bevel gear 65 at the bottom of the third rotating shaft 69 to rotate, so that the second bevel gear 65 at the top of the third rotating shaft 69 rotates. Furthermore, the first bevel gears 63 on the two third rotating shafts 69 rotate. The first bevel gear 63 drives the third rotating shaft 69 to rotate, so that the driving rod 61 drives the mounting plate 62 and the sliding plate 72 to slide in the second chute 17, so as to realize the opening and closing of the shielding assembly 7 for the receiving groove 30. It should be noted that in this embodiment, the two third rotating shafts 69 and the sliding plate 72 are coaxially arranged. Second bevel gears 65 are sleeved on both ends of the fifth rotating shaft 64. The second bevel gear 65 at the top of the fifth rotating shaft 64 meshes with the first bevel gears 63 on the two third rotating shafts 69. The second bevel gear 65 at the bottom of the fifth rotating shaft 64 meshes with the third bevel gear 66. Of course, the diameters of multiple bevel gears can be adjusted according to actual situations and are not restricted here.

[0026] In this embodiment, as Figure 5 and Figure 13As shown, a first sealing gasket 3 is fixedly connected along the sliding plate 72 in the second sliding groove 17. The first sealing gasket 3 is fixedly connected inside the protective cylinder 2 and is arranged along the length direction of the second sliding groove 17. The first sealing gasket 3 is arranged in contact with the sliding plate 72 and the shielding cloth 71. Specifically, the first sealing gasket 3 is in contact with the sliding plate 72 and the shielding cloth 71. During the sliding process of the sliding plate 72, the sliding plate 72 and the shielding plate 26 can continuously contact the first sealing gasket 3 and always maintain a sealed state, preventing external impurities, etc. from entering the receiving groove 30, and preventing the liquid ammonia leaked from the tank body 14 inside the protective cylinder 2 from splashing to the outside. Further, two grooves 20 are embedded in the protective cylinder 2 along the sliding plate 72 relatively. The two grooves 20 are communicated with the second sliding groove 17. A plurality of groups of elastic mechanisms 4 are fixedly installed in each of the two grooves 20. The movable end of the elastic structure is fixedly connected with a second sealing gasket 19 that can be in contact with the sliding plate 72 and the shielding plate 26. The second sealing gasket 19 is arranged along the length direction of the second sliding groove 17. The elastic mechanism 4 makes the second sealing gasket 19 contact the sliding plate 72 and the shielding plate 26. When the sliding plate 72 moves, the second sealing gasket 19 can be adaptively adjusted to further enhance the sealing effect. The double-sealing structure greatly improves the sealing performance of the protective cylinder 2, ensuring that external substances can be effectively prevented from entering and internal substances from leaking under various working conditions. It should be noted that the elastic mechanism 4 is a prior art and will not be described herein.

[0027] In this embodiment, as Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in the figure, the first end of the spray pipe 11 is slidably arranged on the inner wall of the protective cylinder 2. The protective cylinder 2 is provided with a first chute 15 for the spray pipe 11 to slide. The second end of the spray pipe 11 extends to the outer wall of the protective cylinder 2. The driving assembly 9 includes a first gear 96 sleeved and fixedly connected to the second end of the spray pipe 11, and a first rack 95 slidably arranged on the outer wall of the protective cylinder 2. The first rack 95 meshes with the first gear 96. A movable plate 93 is vertically and fixedly connected to the first rack 95. An activity groove 92 is provided through the movable plate 93 along its length direction. One end of a Z-shaped rod 94 is movably arranged in the activity groove 92. A first motor 91 is fixedly connected to the protective cylinder 2. The driving end of the first motor 91 is fixedly connected to the second end of the Z-shaped rod 94. Specifically, the first motor 91 is controlled by an external control mechanism to drive the Z-shaped rod 94 to rotate. The Z-shaped rod 94 drives the movable plate 93 and the first rack 95 to slide on the outer wall of the protective cylinder 2 through the activity groove 92. Since the first rack 95 meshes with the first gear 96, the spray pipe 11 rotates and rotates in the first chute 15. Further, the conveying assembly 8 includes a water pump 82 fixedly installed on the liquid ammonia tank truck body 1. The water inlet end of the water pump 82 is communicated with a water tank 81 fixedly installed on the liquid ammonia tank truck body 1. The water discharge end of the water pump 82 is communicated with the second end of the spray pipe 11 through a connecting pipe 83. The connecting pipe 83 and the spray pipe 11 are communicated through a rotary joint 12. The water pump 82 pumps water from the water tank 81 and transports the water to the spray pipe 11 through the connecting pipe 83 and the rotary joint 12 to realize the spraying operation on the tank body 14. The conveying assembly 8 has a simple structure and can reliably provide water source for the spray pipe 11 to meet the requirements of spraying and cooling, etc., and ensure the safety during the liquid ammonia transportation process. It should be noted that in this embodiment, special additives such as flame retardants can be considered to be added to the water tank 81 to further enhance the spraying effect, and at the same time, the control mode of the water pump 82 is optimized to realize automatic start-stop and flow regulation.

[0028] In this embodiment, as Figure 1 , Figure 2 and Figure 3 shown, partitions 10 for placing the shielding cloth 71 are fixedly connected to the two sides of the protective cylinder 2 relatively.

[0029] Working principle: When it is necessary to cool the tank body 14, water can be transported to the spray pipe 11 through the transport component 8, so that the water is discharged from the drain holes on the spray pipe 11 to the outer wall of the tank body 14. At the same time, the drive component 9 drives the spray pipe 11 to rotate reciprocally, so that the spray pipe 11 rotates reciprocally along the outer wall of the tank body 14, enabling the water to be evenly sprayed onto the outer wall of the tank body 14 to achieve the cooling effect. When liquid ammonia leaks inside the tank body 14, the pressure sensor 29 senses it and sends a signal to the external control mechanism. The external control mechanism controls the rotation component 6 to start. The rotation component 6 drives the sliding plates 72 of the two shielding components 7 to slide relative to each other in the second chute 17 of the protective cylinder 2, so that the shielding cloth 71 unfolds. At the same time, when the sliding plate 72 moves, the storage cylinder 5 moves accordingly. When the third gear 24 meshes with the second rack 18, the third gear 24 drives the second gear 22 and the second rotating shaft 23 to rotate. The rotation of the first rotating shaft 21 causes the baffle 26 to open the through hole 27, and the slaked lime powder can be sprinkled out from the through hole 27 and successively fall on the outer wall of the tank body 14 as the sliding plate 72 rotates. The slaked lime powder can react with liquid ammonia, playing a certain emergency treatment role and reducing the harm caused by liquid ammonia leakage. When the sliding plate 72 slides to the designated position, the rubber blocks 73 on the two sliding plates 72 fit together, so that the shielding component 7 shields the receiving groove 30, preventing the liquid ammonia leaked from the tank body 14 from spraying to the outside and avoiding the situation of personnel being injured. Then, the external control mechanism drives the drive component 9 to drive the spray pipe 11 to rotate reciprocally, and scans the outer wall of the tank body 14 through the infrared thermal imager 16. When liquid ammonia leaks, due to the endothermic vaporization of liquid ammonia, the temperature of the leakage area will be lower than the surrounding environment. The infrared thermal imager 16 forms a thermal image by detecting the thermal radiation difference on the surface of the object, thereby showing the temperature abnormal area and helping to find the liquid ammonia leakage point. When the liquid ammonia leakage point is found, the drive component 9 stops operating, so that the drain holes of the spray pipe 11 are opposite to the leakage point of the tank body 14. At this time, the transport component 8 is started through the external control mechanism, so as to transport water into the spray pipe 11 and spray it from the drain holes to the leakage point of the tank body 14 to achieve the dilution treatment of liquid ammonia. The overall structure is simple to operate and has a high degree of automation. It can timely detect the leakage of liquid ammonia in the tank body 14 and take shielding and neutralization measures to achieve the dilution treatment of liquid ammonia, prevent the leakage of liquid ammonia from causing harm to personnel, and reduce the risk of liquid ammonia leakage.

[0030] The present invention is not limited to the above embodiments. Anyone should know that structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, all fall within the protection scope of the present invention. The technologies, shapes, and structures not detailedly described in the present invention are all well-known technologies.

Claims

1. A liquid ammonia tank truck for transporting liquid ammonia, comprising a liquid ammonia tank truck body (1), a tank body (14), and a pressure sensor (29) arranged on the tank body (14), characterized in that: A protective cylinder (2) is fixedly mounted on the liquid ammonia tank truck body (1), the protective cylinder (2) having a receiving groove (30) for mounting the tank body (14) extending therethrough, the protective cylinder (2) having two groups of shielding components (7) that can relatively slide along its axis and can shield the receiving groove (30), the protective cylinder (2) having a rotating component (6) that drives the two groups of shielding components (7) to relatively slide along the axis of the protective cylinder (2), the shielding component (7) comprising a sliding plate (72), a shielding cloth (71) and a a rubber block (73), the sliding plate (72) being slidably arranged on the protective tube (2), the two ends of the shielding cloth (71) being fixedly connected to the sliding plate (72) and the protective tube (2) respectively, the rubber block (73) being fixedly connected to one end of the sliding plate (72) away from the shielding cloth (71), the protective tube (2) being provided with a second slide groove (17) for the sliding plate (72) to slide, and the rotating assembly (6) being configured to drive the sliding plate (72) to slide along the second slide groove (17); A spray pipe (11) is rotatably arranged in the containing groove (30) in the protective tube (2) relative to the tank body (14); the spray pipe (11) and the protective tube (2) are coaxially arranged; the protective tube (2) is provided with a driving component (9) for driving the spray pipe (11) to reciprocate along the outer wall of the tank body (14); a plurality of infrared thermal imagers (16) with detection ends facing the tank body (14) are arranged at intervals on the spray pipe (11); and the liquid ammonia tank truck body (1) is provided with a conveying component (8) connected to the spray pipe (11).

2. The liquid ammonia tank truck for liquid ammonia transportation according to claim 1, characterized in that: A storage cylinder (5) capable of containing slaked lime powder is fixedly connected to the side of the sliding plate (72) facing the containing groove (30); a through hole (27) is penetrated through one end of the storage cylinder (5) facing the tank body (14); a first rotating shaft (21) is internally threadedly connected to the storage cylinder (5); the first rotating shaft (21) is fixedly connected to a baffle (26) capable of shielding the through hole (27) through a plurality of connecting rods (25); an upper end of the first rotating shaft (21) extends to the outer wall of the storage cylinder (5) and is sleeved with a second gear (22); a second rotating shaft (23) is rotatably connected to the storage cylinder (5); a third gear (24) meshing with the second gear (22) is sleeved on the second rotating shaft (23); a second rack (18) meshing with the third gear (24) is fixedly connected to the inner wall of the protective cylinder (2); the second rack (18) is coaxially arranged with the second rotating shaft (23).

3. The liquid ammonia tanker for liquid ammonia transportation according to claim 2, characterized in that: At least one limiting protrusion (13) is fixedly connected to the inner wall of the storage tube (5) and limits the baffle (26) to the opening (27).

4. The liquid ammonia tank truck for liquid ammonia transportation according to claim 1, characterized in that: The rotating assembly (6) comprises: Two third rotating shafts (69) are arranged in the protective tube (2) for relative rotation, and the two third rotating shafts (69) are both fixedly connected to a driving rod (61) whose other end is fixedly connected to a mounting plate (62), the two driving rods (61) are staggered, the mounting plate (62) is an L-shaped structure, the mounting plates (62) on the two driving rods (61) are in the same horizontal plane, the mounting plates (62) on the two driving rods (61) are respectively fixedly connected to the sliding plates (72) on the two groups of the shielding components (7), and the two third rotating shafts (69) are both sleeved with a first bevel gear (63); a fourth rotating shaft (67) rotatably disposed on the protective tube (2); a first end of the fourth rotating shaft (67) extending to an outer wall of the protective tube (2); a second motor (68) for driving the first end of the fourth rotating shaft (67) to rotate is fixedly connected to the protective tube (2); and a third bevel gear (66) is sleeved on the second end of the fourth rotating shaft (67); A fifth rotating shaft (64) is rotatably disposed in the protective tube (2), and second bevel gears (65) meshing with the third bevel gear (66) and the two first bevel gears (63) are sleeved on both ends of the fifth rotating shaft (64).

5. The liquid ammonia tanker for liquid ammonia transportation according to claim 4, characterized in that: A first sealing gasket (3) is fixedly connected relatively to the sliding plate (72) in the second sliding groove (17); the first sealing gasket (3) is fixedly connected to the inside of the protective tube (2) and arranged along the length direction of the second sliding groove (17); the first sealing gasket (3) is fitted with the sliding plate (72) and the shielding cloth (71).

6. The liquid ammonia tanker for liquid ammonia transportation according to claim 5, characterized in that: The protective tube (2) has two groove bodies (20) relatively embedded along the sliding plate (72), and the two groove bodies (20) are connected to the second slide groove (17). Multiple groups of elastic mechanisms (4) are fixedly installed in the two groove bodies (20), and the movable end of the elastic structure is fixedly connected to a second sealing gasket (19) that can fit with the sliding plate (72) and the shielding plate (26), and the second sealing gasket (19) is arranged along the length direction of the second slide groove (17).

7. The liquid ammonia tanker for liquid ammonia transportation according to claim 1, characterized in that: The first end of the spray pipe (11) is slidably arranged on the inner wall of the protective cylinder (2), the protective cylinder (2) is provided with a first slide groove (15) for the spray pipe (11) to slide, the second end of the spray pipe (11) extends to the outer wall of the protective cylinder (2), and the driving component (9) comprises: A first gear (96) which is sleeved on and fixedly connected to the second end of the spray pipe (11); A first rack (95) is slidably disposed on the outer wall of the protective tube (2), the first rack (95) being meshed with the first gear (96), a movable plate (93) being vertically and fixedly connected to the first rack (95), and a movable groove (92) penetrating the movable plate (93) along its length direction; A Z-shaped rod (94) has a first end movably disposed in the movable groove (92), a first motor (91) is fixedly connected to the protective tube (2), and a driving end of the first motor (91) is fixedly connected to the second end of the Z-shaped rod (94).

8. The liquid ammonia tanker for liquid ammonia transportation according to claim 7, characterized in that: The conveying assembly (8) comprises: A water pump (82) is fixedly mounted on the liquid ammonia tank truck body (1); a water inlet end of the water pump (82) is connected to a water tank (81) fixedly mounted on the liquid ammonia tank truck body (1); a discharge end of the water pump (82) is connected to the second end of the spray pipe (11) via a connecting pipe (83); and the connecting pipe (83) and the spray pipe (11) are connected via a rotating joint (12).

9. The liquid ammonia tanker for liquid ammonia transportation according to claim 1, characterized in that: Partition plates (10) for placing the shielding cloth (71) are relatively fixedly connected to both sides of the protective tube (2).

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