Auxiliary disassembly and assembly tool for manhole cover of tank car

Abstract

The utility model discloses an auxiliary disassembly and assembly tool for a manhole cover of an automobile tank car, which is characterized in that a connecting arm 11 of the tool is connected with a pallet fork of a stacking machine 1 through a bolt, and a shaft 6 is fixed at an opening end of the connecting arm 11; one end of the support steel 2 is fixed with the middle part of the shaft, and a through hole is formed in the part close to the fixed end; the rectangular bolt 3 horizontally penetrates through the through hole and is movably connected with the support steel 2; the manual wrench 9 drives the manhole cover to rotate through a rigid system formed by the shaft, the supporting steel 2 and the rectangular bolt 3, and the inclination angle of the manhole cover is adjusted; the ratchet wrench 10 controls the shaft to rotate in one direction and is used for reversely locking rotation of the shaft after the inclination angle of the manhole cover is adjusted in place. The auxiliary dismounting device can realize auxiliary dismounting of manhole covers with different inclination angles of the tank car, and has the advantages of high safety, strong practicability, convenience in operation and the like.

Description

Technical Field

[0001] This utility model relates to an auxiliary tool for disassembling and assembling manhole covers on tank trucks. It can assist on-site personnel in disassembling and installing manhole covers during regular inspections of tank trucks, effectively improving on-site safety and reducing the labor intensity of personnel. Background Technology

[0002] Tank trucks are critical transportation vehicles specifically designed for transporting liquefied gases, compressed gases, and various liquid media at both ambient and cryogenic temperatures. They are widely used in the distribution of chemical products such as liquid ammonia, liquefied petroleum gas, and propylene, as well as other industrial raw materials and finished products, playing a vital role in supply chain management across multiple industries, including chemicals and energy. According to relevant regulations and standards, tank trucks must undergo regular annual inspections / comprehensive checks to ensure safe operation. One essential step in the inspection process is the removal of the manhole cover to allow inspection personnel to enter the tank and perform their inspections. The manhole cover is then reinstalled after the inspection is completed.

[0003] Typically, manhole covers on tank trucks are located in three main positions: the top of the tank, the upper part of the rear end cap, and the lower part. Installation of manhole covers at the lower end cap often relies on manual lifting and positioning by auxiliary personnel, a particularly complex process. Furthermore, most tank trucks have ladders or safety warning signs in the rear bumper area, further limiting the workers' operating space. Given that manhole covers can weigh up to approximately 80 kilograms, installation work is not only physically demanding but also poses significant safety hazards such as accidental detachment and personnel injury. Therefore, optimizing the installation process, employing auxiliary lifting equipment, or improving manhole cover design to enhance operational safety and efficiency have become urgent issues to address.

[0004] To address the aforementioned issues, utility model patent ZL202220067208.5 provides an innovative auxiliary tool for disassembling and installing manhole covers on tank trucks, aiming to optimize the worker's operating environment and significantly improve work efficiency. This tooling integrates a vertical lifting platform, a movable sliding bracket, and a tilting lifting mechanism mounted on the vertical lifting platform. Through the sliding bracket, the vertical lifting platform can be flexibly positioned below the tilted manhole cover of the tank truck, facilitating the disassembly and installation of the manhole cover. However, while this tooling improves working conditions to some extent, its design still has limitations. Because the tilt angle is fixed, and the disassembly and installation operations require the tooling to be moved directly below the manhole cover, its applicability is limited to specific situations where the manhole cover tilt angle is uniform and no ladder or safety warning sign is installed above the rear bumper of the tank truck. In reality, due to differences in the tilt angle of manhole covers in tank trucks designed by different manufacturers, and the fact that most tank truck rear bumper areas are equipped with ladders or safety warning signs, the versatility and flexibility of this tooling in practical applications are limited.

[0005] Therefore, in order to better adapt to different tank truck models and operating environments, it is necessary to further develop more flexible and adjustable manhole cover installation fixtures to overcome the limitations of existing fixtures in use. Summary of the Invention

[0006] In order to overcome the above-mentioned problems of the prior art, the purpose of this utility model is to provide a high-safety, highly practical and easy-to-install auxiliary disassembly and assembly tool for manhole covers of tank trucks.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A tooling for assisting in the disassembly and assembly of a manhole cover for a tank truck includes a forklift, a connecting arm 11 connected to the forks of the forklift 1 by bolts, a shaft 6 fixed to the open end of the connecting arm 11 by bearings and bearing seats 4, one end of a support steel 2 fixed to the middle of the shaft, a through hole provided near the fixed end, a rectangular pin 3 passing horizontally through the through hole and forming a movable connection with the rectangular support steel 2, a manual wrench 9 driving the manhole cover to rotate through the rigid system formed by the shaft, the rectangular support steel 2 and the rectangular pin 3 to adjust the tilt angle of the manhole cover, and a ratchet wrench 10 controlling the unidirectional rotation of the shaft, used to lock the rotation of the shaft in the reverse direction after the tilt angle of the manhole cover is adjusted to the correct position; wherein, one end of the ratchet wrench 10 is welded to a hexagonal nut on the outside of the shaft and connected to the shaft, and the other end is fixed to the connecting arm 11 by welding or binding; the manual wrench 9 is welded to a hexagonal nut at the end of the shaft and forms a movable connection with the shaft.

[0009] The aforementioned auxiliary tooling for disassembling and assembling manhole covers for tank trucks has a connecting arm 11 that is U-shaped and is horizontally fixed to the forks of a stacker. The opening faces outward and the width of the opening is greater than the width of the tank truck ladder or safety sign.

[0010] The aforementioned auxiliary disassembly and assembly fixture for a tanker truck manhole cover has a rectangular cross-section for the supporting steel 2. The distance between the upper edge of the through hole and the outer side of the shaft is greater than the diameter of the handle on the manhole cover, so that the rectangular pin 3 can be inserted into the through hole and pass through the handle.

[0011] The aforementioned auxiliary tooling for disassembling and assembling manhole covers for tank trucks has a continuous groove on one side of the pin 3, which can prevent the manhole cover from slipping when it contacts the manhole cover handle 12.

[0012] The aforementioned auxiliary tooling for disassembling and assembling manhole covers for tank trucks has a forklift that is manually or electrically controlled in the horizontal direction and electrically controlled in the vertical direction; the lifting height of the forklift in the vertical direction is greater than or equal to the height of the manhole cover from the ground.

[0013] The usage method is as follows: When installing the manhole cover, lower the height of the stacker forks so that the rectangular support steel is located in the middle of the manhole cover handle. Insert the rectangular pin to fix the manhole cover to the rectangular support steel. Raise the height of the stacker forks. When the manhole cover is higher than the ladder / safety sign, move the stacker horizontally so that the manhole cover passes the sign. Then, lower the height of the stacker forks while adjusting the tilt angle of the manhole cover using a manual wrench. When the manhole cover is parallel to the flange of the tank truck's manhole cover, stop turning the manual wrench and lock the current angle using the ratchet wrench. Then, move the stacker to install the manhole cover. After installation, remove the rectangular pin to complete the auxiliary installation of the manhole cover. The disassembly process is the reverse of the installation process.

[0014] The advantages and positive effects of this utility model are as follows:

[0015] (1) High safety. The tooling structure has been optimized to ensure that the overall structure can fully withstand various forces that may be generated during the assembly and disassembly of the manhole cover, thus guaranteeing the stability and safety of the operation. The equipped ratchet device effectively prevents the manhole cover from rotating in the opposite direction during operation, enhancing the safety of the operation. At the same time, the rectangular pin design incorporates continuous grooves, increasing friction and greatly avoiding slippage that may occur during the lifting of the manhole cover, further improving the reliability of the operation.

[0016] (2) High practicality. The tooling design is flexible and can adapt to the installation and disassembly requirements of manhole covers with different tilt angles. It is especially suitable for manhole cover operations on tank trucks with ladders or safety warning signs installed on the rear bumper, and has high practicality and wide applicability.

[0017] (3) Easy to operate. The horizontal movement of the tool can be easily achieved by a single person, while the vertical lifting relies on motor drive, making operation simple. Both the manual wrench and the ratchet wrench cleverly utilize the lever principle, making the operation process more labor-saving. During the disassembly and installation of the manhole cover, only one person needs to operate the tool to complete the auxiliary work smoothly. Attached Figure Description

[0018] Figure 1 This is a connection diagram of the auxiliary disassembly and assembly tooling for the manhole cover of the tanker truck of this utility model.

[0019] Figure 2 This is a schematic diagram of a rectangular pin structure.

[0020] Figure 3 This is a schematic diagram of the auxiliary disassembly and assembly tooling for the manhole cover of the automobile tanker in different states.

[0021] In the diagram, 1 is the forklift, 2 is the rectangular support steel, 3 is the rectangular pin, 4 is the bearing housing, 5 is the bearing, 6 is the shaft, 7 is the manhole cover, 8 is the hex nut, 9 is the manual wrench, 10 is the ratchet wrench, 11 is the connecting arm, and 12 is the manhole cover handle. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0023] like Figure 1 As shown, an auxiliary tooling for disassembling and assembling a manhole cover for a tank truck includes a forklift 1, a connecting arm 11, a bearing seat 4, a bearing 5, a shaft 6, a support steel 2, a rectangular pin 3, a manual wrench 9, a ratchet wrench 10, and a hexagonal nut 8. The connecting arm 11 is horizontally connected to the forks of the forklift 1 by bolts, and the connecting arm is U-shaped with the opening facing outwards. The shaft 6 is fixed to the open end of the connecting arm 11 by the bearing and the bearing seat 4. The support steel 2 has a rectangular cross-section, and one end is welded to the middle of the shaft. A through hole is provided near the fixed end. The rectangular pin 3 passes horizontally through the through hole on the support steel 2 and forms a movable connection with the support steel 2. One end of the ratchet wrench 10 is connected to the shaft by a hexagonal nut 8 welded to the outside of the shaft, and the other end is fixed to the rectangular connecting arm 11 by welding or binding. The manual wrench 9 is welded to the hexagonal nut 8 at the end of the shaft, and forms a movable connection with the shaft.

[0024] The horizontal movement of the stacker 1 is manually or electrically controlled, while its vertical movement is electrically controlled. The vertical lifting height of the stacker 1 is not less than the height of the tank truck's manhole cover from the ground.

[0025] The opening width of the connecting arm 11 should be greater than the width of the tanker truck ladder / safety sign, and the horizontal extension length should be such that the manhole cover can rotate horizontally.

[0026] The distance between the upper edge of the through hole on the support steel 2 and the outer side of the shaft is slightly larger than the diameter of the handle on the manhole cover, so that the rectangular pin 3 can pass through the through hole and the handle at the same time.

[0027] The rectangular pin 3 has a continuous groove on one side to increase friction and prevent the manhole cover from slipping when it comes into contact with the manhole cover handle 12.

[0028] The manual wrench 9 can rotate the manhole cover via the shaft, rectangular support steel 2, and rectangular pin 3, thereby adjusting the tilt angle of the manhole cover. The ratchet wrench 10 can control the shaft to rotate in one direction. After the tilt angle of the manhole cover is adjusted to the correct position, the shaft rotation can be locked in the opposite direction.

[0029] When installing the manhole cover, lower the height of the forks of the stacker 1, and position the manhole cover vertically so that the rectangular support steel 2 is located in the middle of the manhole cover handle 12, ensuring that it is tightly against the shaft and the rectangular support steel. Insert the rectangular pin 3 into the through hole of the rectangular support steel 2 to fix the manhole cover to the rectangular support steel 2. Figure 3 (a) Raise the height of the forks of the stacker 1. When the manhole cover is higher than the height of the ladder / safety sign, move the stacker 1 horizontally so that the manhole cover passes the sign. Then, while lowering the height of the forks of the stacker 1, adjust the tilt angle of the manhole cover using the manual wrench 9. Figure 3 As shown in (b), (c), and (d), when the manhole cover is parallel to the manhole cover flange of the tank truck, stop turning the manual wrench 9 and lock the current angle using the ratchet wrench 10. Then move the forklift 1 to install the manhole cover. After installation, remove the rectangular pin 3 to complete the auxiliary installation of the manhole cover. The disassembly process is the reverse of the installation process.

[0030] The above description is only a preferred embodiment of the present utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tooling for assisting in the disassembly and assembly of a manhole cover for a tank truck, comprising a forklift, characterized in that, The connecting arm (11) is connected to the forks of the stacker (1) by bolts, and the shaft (6) is fixed to the open end of the connecting arm (11) by bearings and bearing seats (4); One end of the support steel (2) is fixed to the middle of the shaft, and a through hole is provided near the fixed end; a rectangular pin (3) passes horizontally through the through hole and forms a movable connection with the rectangular support steel (2); The manual wrench (9) drives the manhole cover to rotate through the rigid system formed by the shaft, the support steel (2) and the rectangular pin (3), and adjusts the tilt angle of the manhole cover; the ratchet wrench (10) controls the shaft to rotate in one direction. After the tilt angle of the manhole cover is adjusted to the correct position, it is used to lock the rotation of the shaft in the reverse direction; one end of the ratchet wrench (10) is welded to the hexagonal nut outside the shaft and connected to the shaft, and the other end is fixed to the connecting arm (11) by welding or binding; the manual wrench (9) is welded to the hexagonal nut at the end of the shaft and is movably connected to the shaft.

2. The auxiliary dismounting tool for manhole cover of tank truck according to claim 1, characterized in that, The connecting arm (11) has a concave cross section and is fixed horizontally to the forks of the stacker. The opening faces outward and the width of the opening is greater than the width of the tanker ladder or safety sign.

3. The auxiliary disassembly and assembly tooling for a tanker truck manhole cover according to claim 1, characterized in that, The support steel (2) has a rectangular cross section. The distance between the upper edge of the through hole and the outer side of the shaft is greater than the diameter of the handle on the manhole cover, so that the rectangular pin (3) can pass through the handle after being inserted into the through hole.

4. The auxiliary dismounting tool for manhole cover of tank truck according to claim 1, characterized in that, The rectangular pin (3) has continuous grooves on one or both sides to increase the contact friction and prevent the manhole cover from slipping when it comes into contact with the manhole cover handle (12).

5. The auxiliary disassembly and assembly tooling for a tanker truck manhole cover according to claim 1, characterized in that, The horizontal movement of the forklift is manually or electrically controlled, while the vertical movement is electrically controlled; the vertical lifting height of the forklift is greater than or equal to the height of the tank truck manhole cover from the ground.

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