A hazardous chemical transport tank

Abstract

The present invention relates to the technical field of transportation tanks, specifically a hazardous chemical transportation tank, which includes a housing mechanism, an expansion mechanism, a blocking mechanism, and a wave prevention mechanism. A certain amount of liquid hazardous chemicals is injected into the interior of the transportation tank shell. When transported without being fully filled, violent shaking will occur. By inflating the airbag, the clearance volume occupied by the liquid inside the transportation tank can be reduced, thereby reducing the amplitude of liquid shaking during transportation. At the same time, during the expansion of the airbag, the connecting pipe will be driven to move, and the movement of the connecting pipe will fit with the second rubber ring, thus blocking the leakage groove to prevent the liquid from passing through the wave prevention plate. At this time, the liquid hazardous chemicals will not flow left and right in the transportation tank and collide violently. At the same time, during the expansion of the airbag, the second steel wire rope will be pulled to move, and the movement of the second steel wire rope will drive the telescopic plate to extend, reducing the amplitude of the liquid moving up and down during the transportation of the liquid in the transportation tank.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation tanks, and specifically relates to a transportation tank for hazardous chemicals. Background Art

[0002] Hazardous chemicals refer to highly toxic chemicals and other chemicals with properties such as toxicity, corrosion, explosion, combustion, and combustion support, which are harmful to humans, facilities, and the environment. During the transportation of hazardous chemicals, they should be handled with care to prevent impact and shaking.

[0003] When the existing transportation tanks for hazardous chemicals are transporting liquid hazardous chemicals and the internal liquid is not full, shaking will occur and thus pose a danger. Although anti-surge plates are provided in the existing transportation tanks, through holes are provided at the bottom to allow the liquid to flow during filling. In this way, when the transportation tank encounters a bumpy road during transportation, the transportation tank will shake violently, and the internal liquid hazardous chemicals will impact the transportation tank body, thereby causing danger. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a transportation tank for hazardous chemicals.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A transportation tank for hazardous chemicals includes a housing mechanism, an expansion mechanism, a blocking mechanism, and an anti-surge mechanism. An expansion mechanism for reducing the volume of the empty gap inside the transportation tank is provided inside the housing mechanism. A blocking mechanism for preventing the left-right flow of liquid hazardous chemicals is provided at the lower end of the expansion mechanism. An anti-surge mechanism for preventing the up-down shaking of liquid hazardous chemicals is provided at the upper end of the blocking mechanism; when a certain amount of liquid hazardous chemicals is injected into the inner shell of the transportation tank and it is not full during transportation, violent shaking will occur. By inflating the airbag, the volume of the gap occupied by the liquid inside the transportation tank can be reduced, so that the amplitude of the liquid shaking during transportation can be reduced. At the same time, during the inflation process of the airbag, the connecting pipe will be driven to move, and the movement of the connecting pipe will fit with the second rubber ring, so as to block the leakage groove and prevent the liquid from passing through the anti-surge plate. At this time, the liquid hazardous chemicals will not flow left and right in the transportation tank and impact violently. At the same time, during the inflation process of the airbag, the second steel wire rope will be pulled to move, and the movement of the second steel wire rope will drive the telescopic plate to extend, reducing the amplitude of the up-down movement of the liquid during the transportation of the liquid in the transportation tank.

[0006] Specifically, the housing mechanism includes a water inlet pipe, the lower end of the water inlet pipe is fixedly connected to the outer shell, the lower end of the outer shell is fixedly connected to the water outlet pipe, and the lower end of the outer shell is fixedly connected to the support; the liquid is poured into the outer shell from the water inlet pipe. When a certain amount of liquid is injected into the outer shell but it is not full, violent shaking is likely to occur during transportation at this time.

[0007] Specifically, the expansion mechanism includes an air inlet pipe. The upper end of the air inlet pipe is fixedly connected to an airbag. The upper end of the airbag is fixedly connected to a first steel wire rope. The upper end of the first steel wire rope is fixedly connected to the housing. One end of the airbag is provided with a baffle. The upper end of the baffle is fixedly connected to a first connecting block. One end of the first connecting block is fixedly connected to a pressing column. One end of the pressing column is in close contact with a first spring. The first spring is arranged inside the barrel. The airbag is inflated through the air inlet pipe. After the airbag is inflated, the air inlet pipe is sealed by a rubber plug. The expansion of the airbag will reduce the volume of the gap inside the housing, thereby reducing the shaking generated by the transport tank during transportation. The expansion of the airbag will squeeze the baffle to move. The movement of the baffle will drive the first connecting block to move. The movement of the first connecting block will drive the pressing column to move. The movement of the pressing column will compress the first spring.

[0008] Specifically, the blocking mechanism includes a second connecting block. One end of the second connecting block is provided with a protruding block. The lower end of the protruding block is fixedly connected to a connecting pipe. The connecting pipe is arranged inside a first rubber ring. During the outward movement of the baffle, it will drive the second connecting block to move outward. The outward movement of the second connecting block will drive the protruding block to move outward. The outward movement of the protruding block will drive the connecting pipe to move outward.

[0009] Specifically, the blocking mechanism further includes a wave-proof plate. The side wall of the first rubber ring is fixedly connected to the wave-proof plate. The side wall of the first rubber ring is fixedly connected to the housing. The lower end of the wave-proof plate is fixedly connected to the housing. A leakage groove is arranged inside the connecting pipe. One end of the leakage groove is provided with a second rubber ring. The second rubber ring is sleeved outside the connecting pipe. The side wall of the second rubber ring is fixedly connected to the housing. The outward movement of the connecting pipe will drive the leakage groove to fit with the second rubber ring, so that the liquid will not pass through the wave-proof plate and shake.

[0010] Specifically, the wave-proof mechanism includes a third connecting block. The side wall of the third connecting block is fixedly connected to a second steel wire rope. The second steel wire rope is in close contact with a rotating pin. One end of the rotating pin is rotatably connected to the housing. One end of the second steel wire rope is fixedly connected to a movable block. A first movable pin is arranged inside the movable block. The side wall of the movable block is fixedly connected to a first connecting rod. One end of the first connecting rod is rotatably connected to a second movable pin. The second movable pin is slidably connected to the housing. The first movable pin is movably connected to one end of a telescopic plate. During the outward movement of the pressing column, it will pull the second steel wire rope. The movement of the second steel wire rope will drive the movable block to move horizontally. The horizontal movement of the movable block will drive the telescopic plate to stretch.

[0011] Specifically, the wave prevention mechanism further includes a telescopic groove, the telescopic plate is arranged inside the telescopic groove, a second spring is arranged inside the telescopic groove, the second spring is sleeved outside the telescopic plate, one end of the telescopic plate is fixedly connected with a sliding block, the sliding block is arranged inside the telescopic groove, one end of the telescopic groove is rotatably connected with a third movable pin, the third movable pin is arranged inside a fixed groove, one end of the fixed groove is fixedly connected with a second connecting rod, and one end of the second connecting rod is fixedly connected with the housing; the telescopic plate floats on the upper surface of the liquid and can reduce the amplitude of the liquid sloshing up and down. When the telescopic plate is shortened, it is convenient to fill the liquid and also convenient to observe the amount of the internal liquid. When the telescopic plate elongates, the telescopic plate can compress the second spring through the sliding block. In this way, when the gas in the airbag is released, the second spring will drive the telescopic plate to reset to the initial position.

[0012] Advantages of the present invention:

[0013] (1) For the hazardous chemical transportation tank of the present invention, a certain amount of liquid hazardous chemicals is injected into the inner shell of the transportation tank. When it is transported without being fully filled, violent sloshing will occur. By inflating the airbag, the gap volume occupied by the liquid inside the transportation tank can be reduced, so that the amplitude of the liquid sloshing during transportation can be reduced.

[0014] (2) For the hazardous chemical transportation tank of the present invention, at the same time, during the inflation process of the airbag, the connecting pipe will be driven to move. The movement of the connecting pipe will fit with the second rubber ring, so that the leakage groove can be blocked to prevent the liquid from passing through the wave prevention plate. At this time, the liquid hazardous chemicals will not flow left and right significantly and impact inside the transportation tank.

[0015] (3) For the hazardous chemical transportation tank of the present invention, at the same time, during the inflation process of the airbag, the second steel wire rope will be pulled to move. The movement of the second steel wire rope drives the telescopic plate to elongate, reducing the amplitude of the liquid moving up and down during the transportation of the liquid in the transportation tank. Description of the drawings

[0016] The present invention will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 is the overall structural schematic diagram provided by the present invention;

[0018] Figure 2 is the partial structural sectional view provided by the present invention;

[0019] Figure 3 is Figure 2 the enlarged schematic view of part A shown in

[0020] Figure 4 is Figure 2 the enlarged schematic view of part B shown in

[0021] Figure 5 Schematic diagram of the connection structure between the movable block shown in Figure 2 and the first connecting rod;

[0022] Figure 6 Schematic diagram of the connection structure between the fixed groove shown in Figure 5 and the second connecting rod;

[0023] Figure 7 Schematic diagram of the connection structure between the telescopic plate shown in Figure 2 and the telescopic groove;

[0024] Figure 8 Schematic diagram of the connection structure between the first movable pin shown in Figure 2 and the movable block;

[0025] Figure 9 Schematic diagram of the connection structure between the telescopic plate shown in Figure 2 and the sliding block.

[0026] In the figure: 1. Housing mechanism; 11. Water inlet pipe; 12. Outer shell; 13. Water outlet pipe; 14. Bracket; 2. Expansion mechanism; 21. Air inlet pipe; 22. Airbag; 23. First steel wire rope; 24. Baffle; 25. First connection block; 26. Extrusion column; 27. First spring; 28. Bucket; 3. Blocking mechanism; 31. Second connection block; 32. Protruding block; 33. Connecting pipe; 34. First rubber ring; 35. Wave prevention plate; 36. Leakage groove; 37. Second rubber ring; 4. Wave prevention mechanism; 41. Third connection block; 42. Second steel wire rope; 43. Rotating pin; 44. First movable pin; 45. Movable block; 46. First connecting rod; 47. Second movable pin; 48. Telescopic plate; 49. Telescopic groove; 410. Second spring; 411. Sliding block; 412. Third movable pin; 413. Fixed groove; 414. Second connecting rod. Detailed implementation manners

[0027] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0028] As shown in Figures 1 - 9As shown in the figure, a hazardous chemical transportation tank according to the present invention includes a housing mechanism 1, an expansion mechanism 2, a blocking mechanism 3, and a wave prevention mechanism 4. An expansion mechanism 2 for reducing the volume of the empty gap inside the transportation tank is provided inside the housing mechanism 1. A blocking mechanism 3 for preventing the left-right flow of liquid hazardous chemicals is provided at the lower end of the expansion mechanism 2. A wave prevention mechanism 4 for preventing the up-and-down shaking of liquid hazardous chemicals is provided at the upper end of the blocking mechanism 3. When a certain amount of liquid hazardous chemicals is injected into the outer shell 12 of the transportation tank and it is not full during transportation, violent shaking will occur. By inflating the airbag 22, the volume of the gap occupied by the liquid inside the transportation tank can be reduced, thereby reducing the amplitude of the liquid shaking during transportation. At the same time, during the expansion of the airbag 22, the connecting pipe 33 will be driven to move. The movement of the connecting pipe 33 will fit with the second rubber ring 37, thereby blocking the leakage groove 36 to prevent the liquid from passing through the wave prevention plate 35. At this time, the liquid hazardous chemicals will not flow left and right in the transportation tank and collide violently. At the same time, during the expansion of the airbag 22, the second steel wire rope 42 will be pulled to move. The movement of the second steel wire rope 42 drives the telescopic plate 48 to extend, reducing the amplitude of the up-and-down movement of the liquid during the transportation of the liquid in the transportation tank.

[0029] Specifically, the housing mechanism 1 includes a water inlet pipe 11. The lower end of the water inlet pipe 11 is fixedly connected to the outer shell 12. The lower end of the outer shell 12 is fixedly connected to the water outlet pipe 13. The lower end of the outer shell 12 is fixedly connected to the support 14. Pour the liquid into the outer shell 12 from the water inlet pipe 11. When a certain amount of liquid is injected into the outer shell 12 but it is not full, violent shaking is likely to occur during transportation at this time.

[0030] Specifically, the expansion mechanism 2 includes an air inlet pipe 21. The upper end of the air inlet pipe 21 is fixedly connected to the airbag 22. The upper end of the airbag 22 is fixedly connected to the first steel wire rope 23. The upper end of the first steel wire rope 23 is fixedly connected to the outer shell 12. One end of the airbag 22 is provided with a baffle 24. The upper end of the baffle 24 is fixedly connected to the first connecting block 25. One end of the first connecting block 25 is fixedly connected to the extrusion column 26. One end of the extrusion column 26 is in close contact with the first spring 27. The first spring 27 is arranged inside the cylinder 28. The airbag 22 is inflated through the air inlet pipe 21. After the airbag 22 is inflated, the air inlet pipe 21 is sealed with a rubber plug. The expansion of the airbag 22 will reduce the volume of the gap inside the outer shell 12, thereby reducing the shaking generated during the transportation of the transportation tank. The expansion of the airbag 22 will squeeze the baffle 24 to move. The movement of the baffle 24 will drive the first connecting block 25 to move. The movement of the first connecting block 25 will drive the extrusion column 26 to move. The movement of the extrusion column 26 will compress the first spring 27.

[0031] Specifically, the blocking mechanism 3 includes a second connecting block 31. One end of the second connecting block 31 is provided with a protruding block 32. The lower end of the protruding block 32 is fixedly connected to a connecting pipe 33. The connecting pipe 33 is disposed inside a first rubber ring 34. During the outward movement of the baffle 24, the second connecting block 31 will be driven to move outward. The outward movement of the second connecting block 31 drives the protruding block 32 to move outward, and the outward movement of the protruding block 32 drives the connecting pipe 33 to move outward.

[0032] Specifically, the blocking mechanism 3 further includes a wave baffle 35. The side wall of the first rubber ring 34 is fixedly connected to the wave baffle 35. The side wall of the first rubber ring 34 is fixedly connected to the outer shell 12. The lower end of the wave baffle 35 is fixedly connected to the outer shell 12. A leakage groove 36 is provided inside the connecting pipe 33. One end of the leakage groove 36 is provided with a second rubber ring 37. The second rubber ring 37 is sleeved outside the connecting pipe 33. The side wall of the second rubber ring 37 is fixedly connected to the outer shell 12. The outward movement of the connecting pipe 33 will drive the leakage groove 36 to fit with the second rubber ring 37, so that the liquid will not pass through the wave baffle 35 and shake.

[0033] Specifically, the wave prevention mechanism 4 includes a third connecting block 41. The side wall of the third connecting block 41 is fixedly connected to a second steel wire rope 42. The second steel wire rope 42 is in close contact with a rotating pin 43. One end of the rotating pin 43 is rotatably connected to the outer shell 12. One end of the second steel wire rope 42 is fixedly connected to a movable block 45. A first movable pin 44 is provided inside the movable block 45. The side wall of the movable block 45 is fixedly connected to a first connecting rod 46. One end of the first connecting rod 46 is rotatably connected to a second movable pin 47. The second movable pin 47 is slidably connected to the outer shell 12. The first movable pin 44 is movably connected to one end of a telescopic plate 48. During the outward movement of the extrusion column 26, the second steel wire rope 42 will be pulled. The movement of the second steel wire rope 42 will drive the movable block 45 to move horizontally, and the horizontal movement of the movable block 45 will drive the telescopic plate 48 to stretch.

[0034] Specifically, the wave prevention mechanism 4 further includes a telescopic groove 49. The telescopic plate 48 is arranged inside the telescopic groove 49. A second spring 410 is arranged inside the telescopic groove 49. The second spring 410 is sleeved outside the telescopic plate 48. One end of the telescopic plate 48 is fixedly connected to a sliding block 411. The sliding block 411 is arranged inside the telescopic groove 49. One end of the telescopic groove 49 is rotatably connected to a third movable pin 412. The third movable pin 412 is arranged inside a fixed groove 413. One end of the fixed groove 413 is fixedly connected to a second connecting rod 414. One end of the second connecting rod 414 is fixedly connected to the outer shell 12. The telescopic plate 48 floats on the upper surface of the liquid and can reduce the amplitude of the liquid sloshing up and down. When the telescopic plate 48 is shortened, it is convenient to fill the liquid and also convenient to observe the amount of the internal liquid. When the telescopic plate 48 extends, it can compress the second spring 410 through the sliding block 411. In this way, when the gas in the airbag 22 is released, the second spring 410 will drive the telescopic plate 48 to reset to the initial position.

[0035] When the present invention is in use, first pour the liquid into the outer shell 12 from the water inlet pipe 11. When a certain amount of liquid is injected into the outer shell 12 but it is not full, violent sloshing is likely to occur during transportation. Therefore, the airbag 22 is inflated through the air inlet pipe 21. After the airbag 22 is inflated, the air inlet pipe 21 is sealed with a rubber plug. The expansion of the airbag 22 will reduce the volume of the gap inside the outer shell 12, thereby reducing the sloshing generated by the transportation tank during transportation. The expansion of the airbag 22 will squeeze the baffle 24 to move. The movement of the baffle 24 will drive the first connecting block 25 to move. The movement of the first connecting block 25 will drive the extrusion column 26 to move. The movement of the extrusion column 26 will compress the first spring 27. At the same time, during the outward movement of the baffle 24, it will drive the second connecting block 31 to move outward. The outward movement of the second connecting block 31 will drive the protruding block 32 to move outward. The outward movement of the protruding block 32 will drive the connecting pipe 33 to move outward. The outward movement of the connecting pipe 33 will drive the leakage groove 36 to fit with the second rubber ring 37. In this way, the liquid will not slosh through the wave prevention plate 35. At the same time, during the outward movement of the extrusion column 26, it will pull the second steel wire rope 42. The movement of the second steel wire rope 42 will drive the movable block 45 to move horizontally. The horizontal movement of the movable block 45 will drive the telescopic plate 48 to stretch. The telescopic plate 48 floats on the upper surface of the liquid and can reduce the amplitude of the liquid sloshing up and down. When the telescopic plate 48 is shortened, it is convenient to fill the liquid and also convenient to observe the amount of the internal liquid. When the telescopic plate 48 extends, it can compress the second spring 410 through the sliding block 411. In this way, when the gas in the airbag 22 is released, the second spring 410 will drive the telescopic plate 48 to reset to the initial position.

[0036] In this case, after the inflation of the airbag 22 reduces the volume of the internal void in the outer shell 12, the internal filling rate remains at 80-95%, meeting the operating specifications, and the airbag 22 enables different volumes to be filled.

[0037] When the present invention is in use, first, the liquid is poured into the outer shell 12 from the water inlet pipe 11. When a certain amount of liquid is injected into the outer shell 12 but it is not full, violent shaking is likely to occur during transportation. Therefore, the airbag 22 is inflated through the air inlet pipe 21. The inflation of the airbag 22 reduces the volume of the internal void in the outer shell 12, thereby reducing the shaking generated by the transport tank during transportation. The inflation of the airbag 22 will squeeze the baffle 24 to move. The movement of the baffle 24 will drive the first connecting block 25 to move. The movement of the first connecting block 25 will drive the extrusion column 26 to move. The movement of the extrusion column 26 will compress the first spring 27. At the same time, during the outward movement of the baffle 24, it will drive the second connecting block 31 to move outward. The outward movement of the second connecting block 31 will drive the convex block 32 to move outward. The outward movement of the convex block 32 will drive the connecting pipe 33 to move outward. The outward movement of the connecting pipe 33 will drive the leakage groove 36 to fit with the second rubber ring 37, so that the liquid will not shake through the wave-proof plate 35. At the same time, during the outward movement of the extrusion column 26, it will pull the second steel wire rope 42. The movement of the second steel wire rope 42 will drive the movable block 45 to move horizontally. The horizontal movement of the movable block 45 will drive the telescopic plate 48 to stretch. The telescopic plate 48 floats on the upper surface of the liquid and can reduce the amplitude of the liquid's up and down shaking. When the telescopic plate 48 is shortened, it is convenient to fill the liquid and also convenient to observe the amount of the internal liquid. The telescopic plate 48 can compress the second spring 410 when it extends through the sliding block 411.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A hazardous chemical transport tank, characterized in that: It includes a housing mechanism (1), an expansion mechanism (2), a blocking mechanism (3), and a wave prevention mechanism (4). Inside the housing mechanism (1), there is an expansion mechanism (2) for reducing the volume of the empty space inside the transportation tank. At the lower end of the expansion mechanism (2), there is a blocking mechanism (3) for preventing the left - right flow of liquid hazardous chemicals. At the upper end of the blocking mechanism (3), there is a wave prevention mechanism (4) for preventing the up - down shaking of liquid hazardous chemicals; The housing mechanism (1) includes a water inlet pipe (11). The lower end of the water inlet pipe (11) is fixedly connected to an outer shell (12). The lower end of the outer shell (12) is fixedly connected to a water outlet pipe (13). The lower end of the outer shell (12) is fixedly connected to a support (14); The expansion mechanism (2) includes an air inlet pipe (21). The upper end of the air inlet pipe (21) is fixedly connected to an airbag (22). The upper end of the airbag (22) is fixedly connected to a first steel wire rope (23). The upper end of the first steel wire rope (23) is fixedly connected to the outer shell (12). One end of the airbag (22) is provided with a baffle (24); The expansion mechanism (2) further includes a first connecting block (25). The upper end of the baffle (24) is fixedly connected to the first connecting block (25). One end of the first connecting block (25) is fixedly connected to an extrusion column (26). One end of the extrusion column (26) is in close contact with a first spring (27). The first spring (27) is arranged inside a barrel (28); The blocking mechanism (3) includes a second connecting block (31). One end of the second connecting block (31) is provided with a raised block (32). The other end of the second connecting block (31) is fixedly connected to the side of the baffle (24) away from the airbag (22); The blocking mechanism (3) further includes a connecting pipe (33). The lower end of the raised block (32) is fixedly connected to the connecting pipe (33). The connecting pipe (33) is arranged inside a first rubber ring (34); The blocking mechanism (3) further includes a wave - prevention plate (35). The side wall of the first rubber ring (34) is fixedly connected to the wave - prevention plate (35). The side wall of the first rubber ring (34) is fixedly connected to the outer shell (12). The lower end of the wave - prevention plate (35) is fixedly connected to the outer shell (12). A leakage groove (36) is arranged inside the connecting pipe (33); The blocking mechanism (3) further includes a second rubber ring (37). One end of the leakage groove (36) is provided with a second rubber ring (37). The second rubber ring (37) is sleeved outside the connecting pipe (33). The side wall of the second rubber ring (37) is fixedly connected to the outer shell (12); The wave prevention mechanism (4) includes a third connecting block (41), and the third connecting block (41) is fixedly connected to the upper end of the extrusion column (26); the side wall of the third connecting block (41) is fixedly connected to a second steel wire rope (42), the second steel wire rope (42) is in close contact with a rotating pin (43), one end of the rotating pin (43) is rotatably connected to the outer shell (12), one end of the second steel wire rope (42) is fixedly connected to a movable block (45), a first movable pin (44) is arranged inside the movable block (45), the side wall of the movable block (45) is fixedly connected to a first connecting rod (46), one end of the first connecting rod (46) is rotatably connected to a second movable pin (47), the second movable pin (47) is slidably connected to the outer shell (12), and the first movable pin (44) is movably connected to one end of a telescopic plate (48); The wave prevention mechanism (4) further includes a telescopic groove (49), the telescopic plate (48) is arranged inside the telescopic groove (49), a second spring (410) is arranged inside the telescopic groove (49), the second spring (410) is sleeved outside the telescopic plate (48), one end of the telescopic plate (48) is fixedly connected to a sliding block (411), the sliding block (411) is arranged inside the telescopic groove (49), and one end of the telescopic groove (49) is rotatably connected to a third movable pin (412); The wave prevention mechanism (4) further includes a fixing groove (413), the third movable pin (412) is arranged inside the fixing groove (413), one end of the fixing groove (413) is fixedly connected to a second connecting rod (414), and one end of the second connecting rod (414) is fixedly connected to the outer shell (12).

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