A drive opening and closing manhole sealing cover for tank car

Abstract

The present application relates to the technical fields of tank car, particularly relates to a kind of tank car drive open and close manhole sealing cover, including tank car connecting port, claw cover locking device, including fixed shell, its inside is provided with the center shaft that can move up and down, its bottom is fixedly connected sealing cover, sealing cover is provided with the claw that interacts with center shaft, center shaft moves downward, drive claw locks tank car connecting port, center shaft moves upward, drive claw releases tank car connecting port;Rotary drive system is connected with rotary link, the other end of rotary link is connected with center shaft, and rotary drive system is used to drive rotary link up and down movement and rotary motion, the present application has the following beneficial effects: high safety and can save time.

Description

Technical Field

[0001] This invention relates to the field of tank truck technology, and in particular to a drive-opening manhole sealing cover for tank trucks. Background Technology

[0002] In recent years, with the rapid expansion of highways, tank trucks have become the main mode of transporting petrochemical products. Most tank truck loading still involves filling the medium through the tank opening on the top of the truck. Currently, the tank opening is primarily bolted, requiring manual opening by an operator each time. This process presents several challenges. Due to the inherent hazards of the chemicals transported in tank trucks, opening the tank opening requires extreme caution. Operators need specialized training and must strictly adhere to operating procedures. In practice, varying operator skill levels can lead to various problems. For example, some operators may not be able to accurately assess the safety of the tank truck, or may make mistakes when opening the opening, resulting in leaks, fires, or other safety accidents. Furthermore, manual opening requires operators to climb onto the top of the tank truck, posing safety hazards. Operators must wait for the opening to be fully completed before proceeding to the next step, which wastes time. Summary of the Invention

[0003] The purpose of this invention is to provide a drive-opening manhole sealing cover for tank trucks, which has the characteristics of high safety and time saving.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a drive-opening manhole sealing cover for tank trucks, including a tank truck connection port.

[0005] The claw cover locking device includes a fixed shell with a central shaft that can move up and down inside. A sealing cover is fixedly connected to the bottom of the shell. The sealing cover is provided with claws that interact with the central shaft. When the central shaft moves down, it drives the claws to lock the tank truck connection port. When the central shaft moves up, it drives the claws to release the tank truck connection port.

[0006] The rotary drive system is connected to a rotary link, the other end of which is connected to a central shaft. The rotary drive system is used to drive the rotary link to move up and down and rotate.

[0007] Preferably, the rotary drive system has two opposite sides with sliding plates two and three. Each of the sliding plates has a groove A and a groove B. Groove A has a straight section and a circular arc section, and groove B is straight. The rotary drive system has driven rod one and driven rod two. The two ends of driven rod one are located in groove A, so that driven rod one can move along the trajectory of groove A. The two ends of driven rod two are located in groove B, so that driven rod two can move along the trajectory of groove B. Both driven rod one and driven rod two are rotatably connected to the rotary connecting rod.

[0008] Preferably, the rotary drive system includes a motor transmission mechanism, a worm gear drive shaft, a worm wheel, and a screw. The motor transmission mechanism drives the worm gear drive shaft, which in turn drives the worm wheel to rotate. There are two screws vertically arranged, and two worm wheels are fixedly connected to each screw. Each screw is threaded with a trapezoidal nut, and a connecting shaft is connected to one of the opposite sides of the two trapezoidal nuts. Support sleeves are provided on the two connecting shafts, and a connecting rod is provided between the connecting shaft and the driven rod. The connecting rod is rotatably connected to both the connecting shaft and the driven rod.

[0009] Preferably, each trapezoidal nut is provided with a support shaft on its outer side, and the rotary drive system is provided with sliding plate one and sliding plate four on its outer side. Slots C are vertically opened on sliding plate one and sliding plate four, and each support shaft is inserted into its corresponding slot C and can move in the slot C.

[0010] Preferably, the motor transmission mechanism includes a power system, the power output end of which is connected to a driving gear, and the worm gear transmission shaft includes a synchronous transmission shaft, on which a driven gear meshes with the driving gear is provided, and the two ends of the synchronous transmission shaft are coaxially connected to a worm, which meshes with a worm wheel.

[0011] Preferably, four claw guide grooves are evenly arranged radially on the upper surface of the sealing cover plate. Each claw is slidably disposed in the claw guide groove. A claw spring and a spring limiting pin are disposed in the claw guide groove. One end of the claw spring abuts against the claw, and the other end abuts against the spring limiting pin, so that the claw has a tendency to move towards the center of the sealing cover plate.

[0012] Preferably, a rotating pin is provided on the side of the central shaft, and a movable limiting block is rotatably mounted on the rotating pin. A tower-shaped spring is horizontally mounted on the side of the central shaft, with one end of the tower-shaped spring abutting against the lower part of the side of the movable limiting block. A groove is provided on the top of the pawl near the movable limiting block for the movable limiting block to be engaged.

[0013] Preferably, the bottom side of the central shaft is concave inward and curved, and the end of the chuck near the central shaft abuts against the central shaft.

[0014] Preferably, a cover plate compression spring is vertically installed at the bottom of the central shaft, with the lower end of the cover plate compression spring abutting against the sealing cover plate, and the side of the central shaft inside the fixed housing protruding outward.

[0015] Preferably, a sealing ring is provided at the bottom edge of the sealing cover.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. Because no manual operation is required to open the lid, it can avoid safety accidents such as leakage and fire caused by human error;

[0018] 2. By avoiding the need for workers to climb heights, the safety hazards associated with working at heights are eliminated;

[0019] 3. The can lid is opened and closed with an automated control system, eliminating the need for staff to wait on-site during operation, thus saving staff time;

[0020] 4. When the chuck is locked, the movable limit block is used to lock the chuck to prevent it from disengaging. Attached Figure Description

[0021] Figure 1 This is a diagram showing the locking state of the chuck;

[0022] Figure 2 This is a diagram showing the unlocked state of the latches;

[0023] Figure 3 This is a diagram showing the sealing cover in the open position;

[0024] Figure 4 This is a diagram showing the sealing cover in its fully open state;

[0025] Figure 5 This is a schematic diagram of the rotary drive system;

[0026] Figure 6 This is an exploded view of a rotary drive system;

[0027] Figure 7 This is a side view of the rotary drive system;

[0028] Figure 8 yes Figure 7 A cross-sectional view along the FF direction;

[0029] Figure 9 This is a schematic diagram of the motor transmission mechanism;

[0030] Figure 10 This is a cross-sectional view of the motor transmission mechanism;

[0031] Figure 11 This is a schematic diagram of a worm gear drive shaft;

[0032] Figure 12 This is a sectional view of the worm gear drive shaft;

[0033] Figure 13 yes Figure 7 A cross-sectional view along the GG direction;

[0034] Figure 14 yes Figure 7 Cross-sectional view along the EE direction;

[0035] Figure 15 This is an exploded view of a rotary drive system;

[0036] Figure 16 This is a schematic diagram showing the position of the rotating linkage in the locked state of the chuck;

[0037] Figure 17 This is a schematic diagram showing the position of the rotating linkage with the chuck released.

[0038] Figure 18 This is a schematic diagram showing the position of the rotating linkage with the sealing cover open.

[0039] Figure 19 This is a schematic diagram showing the position of the rotating connecting rod with the sealing cover fully open.

[0040] Figure 20 This is an exploded schematic diagram of the chuck cover locking device;

[0041] Figure 21 This is a cross-sectional view of the chuck cover locking device;

[0042] Figure 22 yes Figure 21 Enlarged diagram of section A in the middle;

[0043] Figure 23 yes Figure 22 Enlarged diagram of section B;

[0044] Figure 24 This is a cross-sectional view of another state of the claw cover locking device.

[0045] In the diagram, 1. Rotary drive system; 11. Front baffle; 110. Sliding plate four; 111. Sliding plate three; 112. Upper baffle; 113. Rotary connecting rod; 1130. Connecting block; 1131. Connecting hole; 114. Driven rod two; 116. Driven rod one; 117. Connecting rod; 118. Screw; 119. Trapezoidal nut; 12. Sliding plate one; 121. Support shaft; 124. Connecting shaft; 125. Support sleeve; 13. Sliding plate two; 130. Groove A; 131. Groove B; 132. Groove C; 14. Worm gear; 15. Worm gear drive shaft; 1510. Driven gear; 1511. Synchronous drive shaft; 152. Adjusting washer; 1 53. Worm gear; 16. Base plate; 17. Motor transmission mechanism; 171. Power system; 172. Drive system support frame; 174. Drive gear; 18. Rear baffle; 19. Side rear baffle; 2. Claw cover locking device; 210. Spring washer; 211. Large washer; 212. Spacer ring; 213. Tower spring; 214. Movable limit block; 215. Rotating pin; 216. Cover plate pressure spring; 217. Spring limit pin; 22. Sealing cover; 23. Tank opening sealing ring; 24. Claw spring; 25. Claw; 26. Claw guide groove; 27. Fixed shell; 28. Central shaft; 29. ​​Anti-dismantling locking bolt; 3. Tank truck connection port. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings.

[0047] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0048] Example:

[0049] like Figure 1 As shown, the system includes a rotary drive system 1, a jaw cover locking device 2, and a tank truck connection port 3. A rotary connecting rod 113 connects the rotary drive system 1 and the jaw cover locking device 2. The rotary drive system 1 drives the rotary connecting rod 113 to move, thereby driving the jaw locking device 2 to move. A sealing cover 22 is installed on the jaw cover locking device 2 to cover the tank truck connection port.

[0050] like Figure 5 , Figure 6 As shown, the rotary drive system 1 is assembled from a front baffle 11, sliding plate one 12, sliding plate two 13, sliding plate three 111, sliding plate four 110, upper baffle 112, side and rear baffles 19, rear baffle 18, and bottom plate 16 as supporting structural components to support the operation of internal parts. The rotary drive system 1 internally houses a motor transmission mechanism 17 and a worm gear transmission shaft 15. Sliding plates two 13 and three 111 are respectively provided with slots A130 and B131. Slot A consists of a straight section and an arc section, while slot B131 is a vertical through slot. Sliding plates one 12 and four 110 are respectively provided with vertical slots C132.

[0051] like Figures 7-10 As shown, the motor transmission mechanism 17 includes a power system 171 and a drive system support frame 172. The power system 171 is an electric motor. The drive system support frame 172 fixes the power system 171 to the sliding plate 111 by bolts. The output shaft of the power system 171 is connected to a drive gear 174, and the shaft end of the drive gear 174 is fixed to the sliding plate 111 by bearings.

[0052] like Figures 11-14As shown, a worm gear drive shaft 15 is installed parallel to the motor transmission mechanism 17 within the rotary drive system 1. This shaft includes a synchronous drive shaft 1511, with worms 153 coaxially connected to both ends of the synchronous drive shaft 1511 along its length. Adjusting washers 152 are connected to both ends of each worm 153 and are mounted within the rotary drive system 1 via bearings. Two worm wheels 14 mesh with the worms 153 within the rotary drive system 1. Four bearings connected to the worms 153 are fixedly mounted on sliding plates 12, 13, 111, and 110, respectively. Adjusting washers 152 are used to adjust the meshing angle between the worms 153 and the worm wheels 14, ensuring synchronous operation of the two worms 118 during operation. A driven gear 1510 is connected to the synchronous drive shaft 1511. The driven gear 1510 meshes with the driving gear 174 to transmit power, ultimately driving the two worms 153 to rotate synchronously.

[0053] like Figure 14 and Figure 15 As shown, two screws 118 are vertically arranged inside the rotary drive system 1. A worm gear 14 is fixedly connected to the screws 118. The lower end of the screws 118 is fixed to the base plate 16 via a bearing, and the upper end is fixed to the upper baffle 112 via a bearing. A trapezoidal nut 119 is threaded onto the screws 118. The rotation of the screws 118 drives the trapezoidal nut 119 to move up and down. A support shaft 121 is connected to one side of the trapezoidal nut 119, and a connecting shaft 124 is connected to the other side. Support sleeves 125 are fitted over the two symmetrical connecting shafts 124 to ensure synchronous movement of the trapezoidal nuts 119 on both sides. A driven rod 116 and a driven rod 2 114 are arranged parallel above the connecting shaft 124. A connecting block 1130 is provided at the end of the rotating connecting rod 113. Two connecting holes 1131 are opened on the side of the connecting block 1130, and the driven rod 116 and the driven rod 2 114 are rotatably connected to the connecting holes 1131 respectively. A connecting rod 117 connects the connecting shaft 124 and the driven rod 116, with both ends of the connecting rod 117 rotatably connected to both. A sliding plate 13 is located between the screw 118 and the driven rod 116, causing both ends of the driven rod 116 to insert into groove A130 and move within it. Both ends of the driven rod 114 are inserted into groove B131 and move within it. When the driven rod 116 moves within groove A130, it first moves upward in a straight line and then along an arc-shaped trajectory. The driven rod 114 moves up and down within groove B. The combined movement of the driven rods 116 and 114 drives the rotating connecting rod 113 to move upward first and then rotate around the driven rod 114. A sliding plate 12 is located on the outermost side, causing the support shaft 121 to insert into groove C132 and move within it.

[0054] like Figures 20-23As shown, the claw cover locking device 2 includes a fixed housing 27, a central shaft 28, and a spacer ring 212. The fixed housing 27 is connected to the sealing cover 22 by bolts. The outer ring of the spacer ring 212 is connected to the fixed housing 27, and the inner ring is connected to the central shaft 28. The side of the central shaft 28 located below the spacer ring 212 protrudes outward, so that the protruding part can abut against the fixed housing 27 during the upward movement of the central shaft 28, thereby limiting the central shaft 28 and preventing it from falling off. The spacer ring 212 extends to the top of the fixed housing 27 and connects to the rotating connecting rod 113. The fixed housing 27 is equipped with an anti-tamper locking bolt 29, which connects to a spring washer 210 and a large washer 211, and cooperates with the fixed housing 27 to clamp the rotating connecting rod 113 in the middle, thereby connecting the rotating connecting rod 113 to the central shaft 28. The anti-tamper locking bolt 29 is used to prevent others from disassembling it. A cover plate compression spring 216 is installed at the bottom of the central shaft 28, and the cover plate compression spring 216 rests on the sealing cover plate 22. Four claw guide grooves 26 are fixedly connected to the upper surface of the sealing cover plate 22. Claws 25 are slidably installed inside the claw guide grooves 26. Claw springs 24 are installed inside the claws 25. The claw springs 24 exert force on the claws 25 near the center side of the cover plate 22, and the other side is fixed to the spring limit pin 217 to ensure that the claw springs 24 are always in a compressed state and that the claws 25 are always in contact with the central shaft 28. The bottom side of the central shaft 28 is concave inward to form a curved surface. A movable limit block 214 is connected to the bottom of the central shaft 28 through a rotating pin 215. The movable limit block 214 can rotate on the central shaft 28. A tower-shaped spring 213 is installed on the side of the central shaft 28, and the tower-shaped spring 213 is installed between the movable limit block 214 and the central shaft 28. The top of the claw 25 near the end of the movable limiting block 214 is recessed inward to form a groove for the movable limiting block 214 to engage. The bottom edge of the sealing cover 22 is provided with a groove, and the tank opening sealing ring 23 is installed in the groove of the sealing cover 22. After the claw cover locking device 2 is connected to the tank truck connection port 3, it is sealed by the tank opening sealing ring 23.

[0055] Work process:

[0056] The sealing cover 22 moves from the locked state to the open state:

[0057] like Figures 1 to 4 As shown, the rotating connecting rod 113 first moves vertically upward, during which the driving claw 25 moves to the outer edge of the sealing cover plate 22, causing the claw 25 to disengage from the tank truck connection port 3. The rotating connecting rod 113 rotates, causing the sealing cover plate 22 to move away from the tank truck connection port 3, ultimately opening the tank truck connection port 3.

[0058] During the vertical upward translation of the rotating link 113, as Figure 13The control power system 171 rotates, driving the drive gear 174 to rotate. The drive gear 174 meshes with the driven gear 1510, causing it to rotate, which in turn drives the synchronous transmission shaft 1511 to rotate. The synchronous transmission shaft 1511 then drives the worm gears 153 on both sides to rotate simultaneously. The worm gears 153 drive the meshing worm wheel 14 to rotate. Figure 14 The worm gear 14 drives the screw 118 to rotate. The rotation of the screw 118 simultaneously drives the trapezoidal nut 119 to move upwards. The upward movement of the trapezoidal nut 119 simultaneously drives the connecting rod 117 to move upwards. The upward movement of the connecting rod 117 drives the driven rod 116 to move upwards. The driven rod 116 then drives the rotating connecting rod 113 to move upwards. This process is as follows: Figures 16 to 17 As shown.

[0059] As the rotating link 113 translates upwards, as Figure 24 As shown, the rotating connecting rod 113 drives the central shaft 28 to move upward. At this time, under the action of the cover plate compression spring 216, the sealing cover 22 continues to remain in its original state. While the central shaft 28 moves upward, the pawl 25 moves outward under the push of the lower arc of the central shaft 28. The pawl 25 is disengaged from the tank truck connection port 3. At this time, the central shaft 28 contacts the fixed shell 27 at position C.

[0060] When the rotating link 113 moves upward to its highest position, the control power system 171 continues to rotate, transmitting power according to the steps described above. Figure 18 As connecting rod 117 rises to the arc position of groove A130 in sliding plate 2, it continues to move upward. Connecting rod 117 begins to move to the arc position, and then tilts, causing rotating connecting rod 113 to lift. At this time, it drives the locking device 2 of the pawl cover plate to move to... Figure 3 The sealing cover 22 is in the open position. At this time, the control power system 171 continues to move until the connecting rod 117 moves to... Figure 19 Position: At this time, the sealing cover 22 is in the fully open state, as shown in the image. Figure 4 .

[0061] The cover moves from the open state to the closed state:

[0062] The motion state is the opposite of the cover plate's movement from the locked state to the open state. The control power system 171 causes the cover plate to first move in the reverse direction from the fully open state, and the linkage's motion state changes from... Figure 19 Position moved to Figure 18 Position, then move to Figure 17 Position, at this time the chuck 25 is in Figure 24 With the chuck unlocked, the control power system 171 continues to move, driving the connecting rod 117 from rotation to horizontal and then vertical downward, causing the rotating connecting rod 113 to move vertically downward, and driving the central shaft 28 downward. Figure 24In the unlocked state, the jaw 25 slides along an arc from the thicker end of the central shaft 28 to the thinner end. At this point, under the action of the jaw spring 24, the jaw 25 moves towards the center of the sealing cover 22, thus locking the tank truck connection port 3. Simultaneously, during the locking process, the jaw 25 pushes the movable limit block 214 to rotate around the rotating pin 215 until the movable limit block 214 passes the step of the jaw 25 and then resets under the action of the tower spring 213. Figure 23 Position, at this time the can opening locking process is completed. After locking, if the pawl 25 is released in case of an accident, it will be blocked by the movable limit block 214 and will not come off.

Claims

1. A drive-operated opening and closing manhole sealing cover for tank trucks, comprising a tank truck connection port, characterized in that, The claw cover locking device includes a fixed shell with a central shaft that can move up and down inside. A sealing cover is fixedly connected to the bottom of the shell. The sealing cover is provided with claws that interact with the central shaft. When the central shaft moves down, it drives the claws to lock the tank truck connection port. When the central shaft moves up, it drives the claws to release the tank truck connection port. A rotary drive system is connected to a rotary link, the other end of which is connected to a central shaft. The rotary drive system is used to drive the rotary link to move up and down and to rotate. Sliding plates two and three are provided on two opposite sides of the rotary drive system. Sliding plates two and three are each provided with grooves A and B. Groove A has a straight section and a circular arc section, and groove B is straight. The rotary drive system is provided with driven rod one and driven rod two. The two ends of driven rod one are located in groove A, so that driven rod one can move along the trajectory of groove A. The two ends of driven rod two are located in groove B, so that driven rod two can move along the trajectory of groove B. Both driven rod one and driven rod two are rotatably connected to the rotary connecting rod. The rotary drive system includes a motor transmission mechanism, a worm gear drive shaft, a worm wheel, and a screw. The motor transmission mechanism drives the worm gear drive shaft, which in turn drives the worm wheel to rotate. There are two screws vertically arranged, and two worm wheels, each fixedly connected to a screw. Each screw is threaded with a trapezoidal nut. A connecting shaft is connected to one of the opposite sides of the two trapezoidal nuts. Support sleeves are installed on the two connecting shafts. A connecting rod is installed between the connecting shaft and the driven rod, and the connecting rod is rotatably connected to both the connecting shaft and the driven rod. Each trapezoidal nut has a support shaft on its outer side. The outer side of the rotary drive system has a sliding plate one and a sliding plate four. Slots C are vertically opened on the sliding plates one and four. Each support shaft is inserted into its corresponding slot C and can move in the slot C. The motor transmission mechanism includes a power system, the power output end of which is connected to a driving gear. The worm gear transmission shaft includes a synchronous transmission shaft, on which a driven gear meshes with the driving gear. Both ends of the synchronous transmission shaft are coaxially connected to a worm, which meshes with a worm wheel.

2. The drive-opening manhole sealing cover for tank trucks according to claim 1, characterized in that, Four claw guide grooves are evenly arranged radially on the upper surface of the sealing cover plate. Each claw is slidably disposed in the claw guide groove. A claw spring and a spring limiting pin are disposed in the claw guide groove. One end of the claw spring abuts against the claw, and the other end abuts against the spring limiting pin, so that the claw has a tendency to move towards the center of the sealing cover plate.

3. A drive-opening manhole sealing cover for tank trucks according to claim 2, characterized in that, A rotating pin is provided on the side of the central shaft, and a movable limiting block is rotatably mounted on the rotating pin. A tower-shaped spring is horizontally mounted on the side of the central shaft, and one end of the tower-shaped spring abuts against the lower part of the side of the movable limiting block. A groove is provided on the top of the pawl near the movable limiting block for the movable limiting block to be engaged.

4. A drive-opening manhole sealing cover for tank trucks according to claim 1, characterized in that, The bottom side of the central shaft is concave and curved, and the end of the chuck near the central shaft abuts against the central shaft.

5. A drive-opening manhole sealing cover for tank trucks according to claim 1, characterized in that, A cover plate pressure spring is vertically installed at the bottom of the central shaft. The lower end of the cover plate pressure spring abuts against the sealing cover plate, and the side of the central shaft inside the fixed housing protrudes outward.

6. A drive-opening manhole sealing cover for tank trucks according to claim 1, characterized in that, A sealing ring is provided at the bottom edge of the sealing cover.

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