A universally movable safe working platform for tank truck inspection

Abstract

The present invention relates to a universally movable tank truck inspection safety work platform. It includes four parts: a leg frame, a platform, a support frame, and a chassis; wherein the chassis is divided into a left chassis and a right chassis, the leg frame is divided into a left leg frame and a right leg frame, and the support frame is divided into a front support frame and a rear support frame; the front and rear supports and the left and right leg frames form a door-shaped structure; the platform is assembled between the left and right leg frames through a lifting mechanism; the platform is box-shaped, and its four surrounding walls and the bottom adopt a steel frame structure with a crossbeam on the top, a platform floor is provided on the bottom, an operating opening is provided on the platform floor, and the platform is also provided with a side door and a center door; the left and right chassis are arranged at the bottom of the left and right leg frames, and the left and right chassis include a support bottom plate and a universally movable wheel mechanism, and the universally movable wheel mechanism includes a universally movable wheel and a wheel drive device. The present invention is a brand-new design of tank truck inspection equipment, with a novel structural layout, comprehensive functions and high safety, and is an important new tool for tank truck inspection and safe production industries.

Description

Technical Field

[0001] The invention relates to the field of special equipment safety inspection, and in particular to a universally movable tank truck inspection safety operation platform. Background Art

[0002] Tank truck inspection requires inspectors to climb to the top of the tank, remove the manhole cover, enter the manhole and perform related work. The inspection work requires two inspectors to go up and down the tank truck roof more than 5 times, including disassembly and installation of safety valves, disassembly and installation of manhole covers, macroscopic, grinding, flaw detection, pressure testing, pressure relief, nitrogen filling, pressure resistance and other tests. In addition, the number of times they go up and down the tank truck roof is even higher due to extra work such as rest and taking things during the inspection process. The tank truck roof is more than 4 meters high and the tank body is smooth, so the danger of tank truck inspection is not only the threat of residual gas in the tank, but more importantly, the risk of falling due to the inconvenience of personnel working at heights.

[0003] At present, each tank truck inspection agency has designed its own inspection platform according to the inspection site, but there are still many risks due to backward technology and poor applicability. Inspection platforms are generally metal structures. Due to their heavy weight, several people are required to move the platform at the same time, which is time-consuming and labor-intensive. Manual operation also has the risk of colliding with the tank truck or personnel. Inspectors are required to wear safety belts when climbing, but the safety belts will also cause inconvenience in the process of disassembling and assembling manhole covers. Some inspectors even selfishly remove the safety belts for the convenience of work, which poses a great safety hazard. If the person in the tank loses consciousness due to suffocation, heat stroke, falls, etc., if the platform is not designed properly, first aid work will be more difficult, and precious golden rescue time will be lost.

[0004] As for more sophisticated inspection equipment and instruments, they cannot be placed on the tank body of the tank truck and are limited by its own height, so the main equipment can only be placed on the ground, making it impossible to introduce advanced inspection equipment to assist in tank truck inspection, and it is impossible to scientifically improve inspection efficiency and enhance inspection results. Summary of the invention

[0005] The purpose of the invention is to provide a universally movable safe working platform for tank truck inspection. The platform adopts electric drive. The inspector controls the universal movement, lifting and lowering of the platform, and controls the manhole alignment. The manhole cover can be removed and installed conveniently and safely, and there is no risk of people falling. At the same time, due to the reasonable structural design of the platform, it can be lifted and lowered and can be flexibly walked by itself, as well as the platform's box structure and various door openings. The platform can be equipped with inspection-related instruments and tools and a variety of first aid emergency measures, which can not only improve the inspection efficiency but also reduce the risk of personal injury. It is an important new tool for tank truck inspection and production safety industries.

[0006] The technical solution of the present invention is:

[0007] The present invention discloses a universally movable tank truck inspection safety operation platform, which comprises four parts: a leg frame, a platform, a support frame, and a chassis; wherein the chassis is divided into a left chassis and a right chassis, the leg frame is divided into a left leg frame and a right leg frame, and the support frame is divided into a front support frame and a rear support frame;

[0008] The left and right ends of the front support frame are respectively fixed to the front of the upper ends of the left and right leg frames, and the left and right ends of the rear support frame are respectively fixed to the rear of the upper ends of the left and right leg frames. The front and rear support frames are symmetrically installed, and the front and rear support frames and the left and right leg frames form a door-shaped structure;

[0009] The platform is box-shaped, and its four surrounding walls and upper and lower bottom adopt steel frame structure. A crossbeam is provided on the top, and a platform top plate is provided on the lower bottom. A rectangular operation opening of at least the same size as the manhole above the tank body of the tank truck is provided in the middle of the platform floor. A movable protective cover is provided on the operation opening. The operation opening serves as a passage to the manhole above the tank body. A side door is provided on the side of the platform, and a center split door is provided in front of the platform. The platform is assembled between the left and right leg frames through a lifting mechanism, and the platform can shuttle between the front and rear support frames.

[0010] The left chassis and the right chassis are respectively connected to the bottom of the left leg frame and the right leg frame. The left chassis and the right chassis respectively include a supporting bottom plate and a universally movable wheel mechanism installed under the bottom of the left chassis and the right chassis. The universally movable wheel mechanism includes a universally movable wheel and a wheel driving device.

[0011] Furthermore, the left and right leg frames described in the present invention include supporting angle steels, ladders, guide channel steels, and a top connecting plate; the supporting angle steels on each side of the leg frame are distributed and arranged, and there are at least 2 or more supporting angle steels, and the upper and lower ends of each supporting angle steel are respectively assembled and fixed on the connecting plate and the supporting base plate; a ladder is assembled on either the left or right leg frame or on both leg frames, and the ladder is located in the middle of the outer side of the leg frame, and its upper and lower ends are respectively fixedly connected to the connecting plate and the supporting base plate; 2 guide channel steels are arranged on each side of the left and right leg frames, and the 2 guide channel steels on each side are respectively located at the two ends of the inner side of the leg frame, and their upper and lower ends are respectively fixed to the connecting plate and the supporting base plate.

[0012] Furthermore, the working opening provided in the middle of the platform floor of the present invention includes an opening provided in the center of the platform floor, the width of the working opening is set to match the size of the manhole above the tank body, and an equal-width long strip opening provided in the center of the side wall and connected to the opening in the center of the platform floor. The height of the opening on the side wall is at least sufficient to accommodate the protruding portion of the curved surface of the tank top with the manhole to facilitate the operator to smoothly enter the tank. A movable protective cover is provided on the opening in the center of the platform floor.

[0013] Furthermore, the platform wall of the present invention is a mesh grille structure with reinforced angle steel inside. The mesh grille prevents the inspectors from shearing accidents during the platform lifting and lowering process, and the inspectors can also perform visual operations through the mesh grille without affecting the operation field of view.

[0014] Furthermore, the lifting mechanism connecting the platform and the left and right leg frames of the present invention includes a guide bearing, a lifting reducer, a screw, a lifting motor, and a lifting connecting shaft; wherein the screw is installed in the middle of the inner side of the left and right leg frames, one on each side; 4 guide bearings are respectively installed on the outer sides of the left and right sides of the platform, and each pair of two is arranged in the groove of the guide channel steel and in sliding contact with the guide channel steel; the screw is installed on the inner side of the left and right leg frames, one on each side; the lifting motor is installed and fixed on the top crossbeam of the platform, the lifting motor is connected to the lifting connecting shaft through a coupling, the lifting connecting shaft is connected to the lifting reducer, the lifting reducer is fixed on both sides of the platform, the lifting reducer is sleeved with the screw, and the lifting reducer is a worm gear reducer. The lifting motor rotates, driving the lifting connecting shaft to rotate, driving the lifting reducer on the screw to rotate forward and reverse, and realizing the up and down movement of the platform.

[0015] Furthermore, the universally movable wheel mechanism installed at the bottom of the left and right chassis of the present invention adopts a Mecanum wheel mechanism, including a Mecanum wheel and a corresponding wheel drive device. The wheel drive device is a power drive component of the Mecanum wheel, which includes a reducer and a drive motor. The inner shaft of the Mecanum wheel is connected to the reducer through a coupling, and the reducer is connected to the drive motor through a flange. The drive motor is forward, reverse, and speed-changed by the signal output by the controller. The reducer reduces the speed of the drive motor and increases the torque at the same time, and controls the Mecanum wheel to rotate; the hub direction of the Mecanum wheel is perpendicular to the long side direction of the chassis, and two Mecanum wheels are installed on each left and right chassis, for a total of four wheels.

[0016] Furthermore, the universally movable wheel mechanism and lifting mechanism of the present invention adopt an electrical control system, which includes a power supply system, an input system, a central controller, and a drive system; the output end of the input system is connected to the input end of the central controller, the output end of the central controller is connected to the input end of the drive system, and the output end of the drive system is respectively connected to the input end of the lifting mechanism and the driving wheel mechanism to control the action of the system.

[0017] The central controller comprises an input photoelectric coupler, an input serial interface, an input CAN bus interface, a single-chip microcomputer, an output photoelectric coupler and an output CAN bus interface; the output ends of the input photoelectric coupler, the input serial interface and the input CAN bus interface are respectively connected to the input end of the single-chip microcomputer, and the output end of the single-chip microcomputer is respectively connected to the output photoelectric coupler and the output CAN bus interface; the central controller and the power supply system are assembled in a chassis and installed in the platform.

[0018] The central controller and the power supply system are assembled in a chassis and installed in the platform; the power supply system includes a transformer and a power switch to supply power to various parts of the working platform. The input system includes a position limiter and an operation console; the position limiter includes a limit switch installed at the top and bottom of the inner side of the left and right leg frames to limit the platform lifting limit position; a distance measuring module installed in the middle of the bottom of the platform to detect the distance between the platform and the tank body; a limit switch installed at the edge of the inner side of the left and right leg frames to detect the limit position of the inner side of the left and right leg frames to the vehicle body; the operation console is provided with various operation switch elements for controlling the platform movement, which are installed on the platform; the drive system includes a motor driver, and the central controller controls the motors in the drive wheel mechanism and the platform lifting mechanism through the motor driver.

[0019] Furthermore, the present invention also provides an audible and visual warning device in the platform, and the audible and visual warning device is arranged in the operating console; a relay is correspondingly arranged in the driving system, and the central controller controls the audible and visual warning device to issue an audible and visual warning through the relay.

[0020] The sound and light warning device uses a buzzer alarm and an alarm light, or uses a voice prompt alarm and an alarm light; when the limit switch is activated, or the distance detection is too close, the alarm will sound an alarm to remind the operator not to operate in the wrong direction.

[0021] Furthermore, the present invention also provides a horizontal laser emitter, a vertical laser emitter, and a contour laser emitter on the platform, and corresponding relays are arranged in the driving system of the control system. The central controller controls the horizontal, vertical, and contour laser emitters to emit laser lines respectively through the relays, so as to realize horizontal, vertical, and contour laser guidance respectively; the horizontal laser emitter is installed on the bottom surface of the platform, flush with the lowest point of the platform; the vertical laser emitter is installed on the upper part of the platform, located in the lateral center of the platform, and the emitted vertical laser light is perpendicular to the lateral direction of the platform; the contour laser emitter is installed on both sides of the bottom surface of the platform, located at the innermost edge of the leg frame, and the emitted contour laser light is flush with the innermost edge of the leg frame.

[0022] Furthermore, the operating console of the present invention is provided with a universal industrial handle, a platform lifting button, an emergency stop switch, and a laser guide switch;

[0023] The universal industrial handle adopts a multi-axis Hall-type industrial joystick, and the operator can control the universal movement of the overall structure by turning the handle direction; the universal industrial handle outputs coordinate value data to the central controller;

[0024] The platform lifting buttons include a lifting button, a lowering button, and an enabling button, which respectively output a lifting signal, a lowering signal, and an enabling signal to the central controller; when the enabling button is pressed, the lifting button or the lowering button is pressed at the same time to control the lifting or lowering of the platform. If the enabling button is not pressed, the lifting or lowering cannot be controlled;

[0025] The emergency stop switch directly connects the 220V power supply to the transformer power line. When an emergency occurs, pressing the emergency stop switch will directly disconnect the power supply.

[0026] The laser guide switch is used to turn on the horizontal, vertical and outline laser guides of the distance measuring module during the alignment process of the tank and the manhole.

[0027] Furthermore, the distance measurement module for the distance between the detection platform and the tank body in the input system of the present invention can be implemented by laser, infrared, ultrasonic wave, radar and the like.

[0028] Description of the workflow of the present invention:

[0029] The tank truck inspection safety work platform provides a safe and reliable working environment for tank truck inspectors. After the tank truck is parked in the inspected parking space, the inspector climbs onto the platform and lifts the platform to the top by pressing the platform lift button on the operating platform. The universal industrial handle on the operating platform controls the universal movement of the safety work platform to the rear of the tank truck. The horizontal laser guide, vertical laser guide, and outline laser guide are turned on. The position of the safety work platform is adjusted so that the horizontal laser light exceeds the highest point of the tank body and the vertical laser light is basically aligned with the center line of the tank body. The outline laser line is observed to ensure that it does not overlap with the vehicle body parts before the tank cover operation can be performed.

[0030] After the inspector has completed the operation of the safe working platform on the tank, he uses the universal industrial handle to visually check whether the working opening on the platform can be docked with the manhole on the tank body. After ensuring that the working opening can be docked with the manhole without touching, the distance measurement module detects that there is a tank body under the platform. The inspector can open the platform floor protection cover to prevent the risk of personnel falling when the platform floor protection cover is opened when there is no tank body under the platform. The inspector controls the platform lifting button to lower the platform. During the descent, the distance measurement module detects the distance from the platform floor to the tank body in real time, and the alarm can output a warning sound according to the range of the detection distance.

[0031] When the working opening is docked with the manhole cover and lowered, the inspector can use the electric tools on the safe working platform to dismantle the manhole cover of the tank truck, lift the manhole cover with the electric hoist, and place the manhole cover in a safe position on the safe working platform. The inspector tightens the safety belt hanging from the electric hoist and controls the electric hoist to transport the inspector to the inside of the tank truck. A blower is also provided on the safe working platform to introduce the air duct into the tank. The blower blows air inward with positive pressure to provide fresh air for the inspectors in the tank to avoid oxygen deficiency and suffocation caused by residual gas or high-temperature closed environment.

[0032] The safety work platform is equipped with emergency rescue equipment, such as oxygen cylinders, first aid kits, rescue stretchers, and fire extinguishers. If the inspector is physically unwell or has an environmental accident, the inspector can be fastened with a safety belt and lifted to the safety work platform by an electric hoist for first aid, ensuring the golden rescue time.

[0033] The safe working platform provides a stable and reliable platform structure for tank truck inspectors. A ladder is set inside the safe working platform. When inspectors need to take a break from work or get tools, they can go up and down the platform through the ladder without moving the entire structure.

[0034] When the inspection of the tank truck is completed, the inspector controls the platform lifting button to lift the safety work platform. After observing that the horizontal laser light exceeds the parts above the tank body, the inspector controls the universal industrial handle to move the safety work platform out of the tank area, and controls the platform lifting button to lower the safety work platform until the inspector can reach the ground.

[0035] If the manhole cover is behind the tank, the center door on one side of the safety work platform can be opened, and the inspector can control the universal industrial handle to move the safety work platform to the rear of the tank. After accurate alignment, the manhole cover can be removed and the inspector can enter and exit.

[0036] The beneficial effects of the present invention are as follows: the tank truck inspection safety operation platform of the present invention is well designed and solves many problems existing in the prior art. The main structural components of the whole are all set as detachable independent structures, which are convenient for transportation, installation, commissioning and maintenance. The whole is set as a door frame structure, and at the same time has omnidirectional mobility, and the platform lifting and lowering control is flexible, which can easily realize the testing of all parts of the tank truck. The rectangular channel holes set on the floor of the platform can efficiently and safely ensure that the inspectors can smoothly detect the inside of the tank body. The structural design of the support frame and the left and right leg frames not only saves materials but also ensures sufficient strength and safety. The Mecanum wheel structure set can enable the platform to move flexibly in a small range, ensuring an accurate, safe and stable inspection process. Various types of inspection devices can be safely and securely placed in the platform to realize all-round and comprehensive inspection of the tank truck. The present invention adopts a door-type structure to ensure uniform support and stable force of the platform. Compared with the platform with unilateral support, it is more stable and has a stronger bearing capacity. The platform load of the present invention only needs to meet the bearing capacity of the platform and the lead screw. The design of this platform is comprehensive in safety, reliable in guarantee, and has very high safety performance. The present invention can basically avoid the danger of workers accidentally falling from heights that may occur in various products in the prior art, and effectively solves the problem of difficulty in rescuing workers who lose consciousness in the tank body due to suffocation, heatstroke, falls, etc., and can avoid various risks of collisions with tank trucks or personnel due to improper operations during inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0038] Figure 2 This is a detailed diagram showing the overall structure of an embodiment of the present invention.

[0039] Figure 3 It is a schematic block diagram of the principle of the control system described in an embodiment of the present invention.

[0040] Figure 4 The figure is a schematic block diagram of the principle of the central processing unit described in the embodiment of the present invention. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] As attached Figure 1 , 2 , 3, and 4 are examples of a universally movable tank truck inspection safety operation platform according to the present invention:

[0043] like Figure 1 The tank truck inspection safety operation platform structure of the present invention is shown to consist of four parts: chassis A, leg frame B, platform C, and support frame D. The chassis A is divided into a left chassis and a right chassis, the leg frame B is divided into a left leg frame and a right leg frame, and the support frame D is divided into a front support frame and a rear support frame. The front and rear support frames are symmetrically fixed to the front and rear sides of the upper ends of the left and right leg frames to form a door-shaped structure; the platform C is assembled between the left and right leg frames through a lifting mechanism.

[0044] Reference Figure 2 As shown in the structural subdivision diagram, in the present invention: the chassis A includes: a supporting base plate A1 and a universally movable wheel mechanism assembled under the supporting base plate, the universally movable wheel mechanism includes a universally movable wheel and a wheel drive device; in the present invention, the universally movable wheel mechanism adopts a Mecanum wheel mechanism, which includes a Mecanum wheel A2, and a wheel drive device A3.

[0045] The support base A1 bears the overall weight of the components above the chassis, and is also a structure that integrates the Mecanum wheel and the drive mechanism. The support base is connected to the shafts on both sides of the Mecanum wheel through load-bearing bearings, which evenly presses the weight on the shaft ends on both sides of the Mecanum wheel.

[0046] The Mecanum wheel A2 is the operating device of the entire mechanism. By adjusting the speed and direction, it generates vector torques in multiple directions to achieve universal movement of the mechanism. The hub direction of the Mecanum wheel A2 is perpendicular to the long side direction of the supporting base plate A1. Two Mecanum wheels A2 are installed on each left and right chassis A, for a total of four wheels.

[0047] The wheel drive device A3 is the power drive component of the Mecanum wheel A2. It includes a reducer and a drive motor. The inner shaft of the Mecanum wheel A2 is connected to the reducer through a coupling, and the reducer and the drive motor are connected through a flange. The drive motor rotates forward, reverses, and changes speed through the signal output by the controller. The reducer reduces the speed of the drive motor and increases the torque at the same time, controlling the Mecanum wheel A2 to rotate.

[0048] The leg frame B includes a supporting angle steel B1, a ladder B2, a guide channel steel B3 and a top connecting plate B4.

[0049] The supporting angle steel B1 is distributed on the supporting base plate A1 and connected by welding or bolts. The upper end of the supporting angle steel B1 is fixedly connected to the top connecting plate B4, which plays a role in stabilizing the support of the leg frame B structure.

[0050] A ladder B2 is installed on either the left or right leg frame or on both leg frames. The ladder B2 is located in the middle of the outer side of the leg frame B and between the supporting angle steels B1. Its upper and lower ends are fixedly connected to the top connecting plate B4 and the supporting bottom plate A1 respectively. The inspector can go up and down through the ladder B2, and the ladder B2 also stabilizes the supporting angle steel B1.

[0051] The upper and lower ends of the guide channel steel B3 are respectively fixed on the top connecting plate B4 and the supporting bottom plate A1, and are connected by welding or bolts. There are 2 guide channels on each side of the left and right leg frames, for a total of 4 guide channels. The 2 guide channels on each side are located at the two ends of the inner side of the leg frame. The guide channel steel B3 plays a role in stabilizing the support of the leg frame B structure, and also plays a role in guiding and stabilizing the platform C.

[0052] The platform C is box-shaped, with its four surrounding walls C1 and bottom adopting steel frame structure, and a crossbeam on the top. The surrounding wall (C1) is composed of mesh grilles with reinforced angle steel inside. The mesh grilles are used to prevent shearing accidents of inspectors during the lifting and lowering of the platform. Inspectors can also perform visual operations through the mesh grilles without affecting the operation field of view.

[0053] A platform floor C8 is provided at the bottom, and an operation opening C7 corresponding to the manhole on the tank body of the tank truck is provided in the middle of the platform floor C8, which includes an opening provided in the center of the platform floor C8, and a long strip opening provided in the center of the side wall and connected to the opening in the center of the platform floor C8, and having the same width. The width of the operation opening C7 is set to match the size of the manhole on the tank body, and the height of the opening on the side wall is at least enough to accommodate the protruding part of the curved surface of the tank top with the manhole, so as to facilitate the smooth entry of the operator into the tank. A protective cover C6 is provided on the operation opening C7, and the protective cover (C6) is connected to the platform floor (C8) by a hinge to prevent the inspector from falling during the lifting process of the platform (C). When the platform floor protective cover (C6) is opened, the operation opening (C7) is exposed, and the inspector can perform operations on the tank through the operation opening (C7).

[0054] The side doors (C9) are located at the legs (B) on both sides of the platform (C). The switch is pushed and pulled on the surrounding wall (C1). After the inspector moves the platform (C) to a suitable position, he / she can enter and exit through the side doors (C9) without repeated lifting and lowering.

[0055] The center door (C10) is located in the middle of the platform (C) and is divided into two leaves. The switch is pushed and pulled on the surrounding wall (C1). When the manhole cover of the tank truck is set at the rear, the center door (C10) can be opened to disassemble and enter and exit the manhole cover.

[0056] The lifting mechanism includes a guide bearing C2, a lifting reducer C3, a lifting motor C4, a lifting connecting shaft C5, a screw C11, etc.

[0057] One screw rod (C11) is installed on each of the left and right leg frames, with a total of 2 screw rods, which are connected by flanges, playing a guiding and supporting role in the lifting of the platform (C).

[0058] The guiding bearings (C2) are arranged on the outer side of the platform (C), slidingly contacting the guiding channel steels (B3) on the left and right leg frames (B). Composite bearings are adopted, which can slide vertically up and down and can also be laterally deflected, preventing the lateral force generated by the platform from damaging the bearings. A total of 8 guiding bearings (C2) are arranged on the platform (C), with 4 guiding bearings (C2) corresponding to each leg frame (B), and 2 guiding bearings (C2) in each guiding channel steel (B3).

[0059] The lifting speed reducer (C3) is sleeved on the screw rod (C11) and is a worm and worm gear speed reducer, generating the up and down movement of the screw rod (C11) through gear rotation.

[0060] The lifting motor (C4) is connected to the lifting connecting shaft (C5) through a coupling. The lifting connecting shaft is connected to the lifting speed reducer (C3). Through the rotation of the lifting motor (C4), the lifting connecting shaft (C5) is driven to rotate, driving the rotation of the lifting speed reducer (C3), and realizing the up and down operation of the platform (C).

[0061] The structure of the support frame (D) is divided into a front support frame (D1) and a rear support frame (D2), which are respectively connected to the left and right leg frames (B), in a 'fork' shape, preventing the overall mechanism from deforming. The platform (C) can shuttle between the front support frame (D1) and the rear support frame (D2).

[0062] Refer to Figure 3 and Figure 4 , in the embodiment of the present invention, the electrical control system of the omnidirectional mobile wheel mechanism and the lifting mechanism includes: a power supply system, a central controller, an input system, and a drive system; the output end of the input system is connected to the input end of the central controller, the output end of the central controller is connected to the input end of the drive system, and the output of the drive system is respectively connected to the input ends of the lifting mechanism and the Mecanum wheel mechanism to control the actions of their systems. The output of the drive system is also respectively connected to an audible and visual warning device, a horizontal laser emitter, a vertical laser emitter, and a profile laser emitter to control the issuance of alarms and the activation of laser guidance.

[0063] Among them, the audible and visual warning device is arranged inside the operation console. The horizontal laser emitter is installed on the bottom surface of the platform, flush with the lowest point of the platform, emitting horizontal laser parallel to the platform floor; the vertical laser emitter is installed on the upper part of the platform, at the horizontal center of the platform, emitting vertical laser perpendicular to the platform horizontally; the profile laser emitter is installed at both sides of the bottom surface of the platform, at the innermost edge position of the leg frame, emitting profile laser flush with the innermost edge position of the leg frame.

[0064] 1. Power supply system: Convert the AC 220V power supply to 48V, 24V, and 12V through a transformer and a switching power supply to supply power to each system module. The power supply system is installed in the chassis and set on platform C.

[0065] 2. Central controller: It is the core of the whole system. It collects the input system data, performs data calculation and processing, and outputs control signals to the drive system. The central controller is installed in the chassis and installed on platform C.

[0066] like Figure 4 The central controller shown includes an input photocoupler, an input serial interface, an input CAN bus interface, a single-chip microcomputer, and an output photocoupler and an output CAN bus interface; the output ends of the input photocoupler, the input serial interface, and the input CAN bus interface are respectively connected to the input end of the single-chip microcomputer, and the output end of the single-chip microcomputer is respectively connected to the output photocoupler and the output CAN bus interface.

[0067] 3. Input system: including position limiter and operation console.

[0068] Position limiter: includes ① a limit switch for limiting the lifting limit position of the platform, ② a distance measuring module for detecting the distance between the platform and the tank body, and ③ a limit switch for detecting the limit position from the inner side of the left and right leg frames to the vehicle body.

[0069] ① The limit switch that limits the platform's lifting and lowering limit positions is installed on the top and bottom of the left and right leg frames. When the platform is lifted to the limit position, the impact bow on the platform hits the upper limit switch, and the platform stops moving in the upward direction, and the platform can move downward; when the platform drops to the limit position, the impact bow on the platform hits the lower limit switch, and the platform stops moving in the downward direction, and the platform can move upward. This type of limit switch limits the platform's operating limit position to prevent the platform from opening the screw limit position and causing a safety accident.

[0070] ② The distance measuring module for detecting the distance between the platform and the tank body is installed in the middle of the bottom of the platform. After the platform is lifted, it is aligned with the manhole of the tank truck through the alignment hole on the platform, and then it is lowered for docking. At this time, the platform bottom plate cannot touch the tank body. This module can measure the distance between the lower part of the platform and the tank body in real time during the descent process. If the distance is less than or equal to the set limit value, the inspection personnel can stop the platform operation in time to prevent the platform floor from touching the tank body.

[0071] ③ The limit switch for detecting the limit position from the inner side of the left and right leg frames to the vehicle body is installed on the inner edge of the left and right leg frames. When the platform is lifted, the operator controls the process of the overall structure being inserted into the tank body. This limit switch is set on the inner edge of the left and right leg frames. If the left and right leg frames are too close to the vehicle body due to improper operation, the vehicle body will touch the limit switch, making the overall structure unable to run in the wrong direction, and can only run in the opposite direction of the error, avoiding the overall structure frame from touching the vehicle body.

[0072] The operating console is equipped with various operating switch elements for controlling the platform movement, which are installed on the platform. It includes a universal industrial handle, a platform lifting button, an emergency stop switch, and a laser guide switch.

[0073] Universal industrial handle: Using a multi-axis Hall-type industrial joystick, the inspector can control the universal movement of the overall structure by turning the handle. The universal industrial handle outputs coordinate value data to the central controller.

[0074] Platform lifting button: There are lifting button, lowering button and enabling button. When the enabling button is pressed, the lifting button or lowering button is pressed at the same time to control the lifting or lowering of the platform. If the enabling button is not pressed, the lifting or lowering cannot be controlled.

[0075] Emergency stop switch: When an emergency occurs, pressing the emergency stop switch will disconnect the power supply to all mechanisms.

[0076] Laser guide switch: During the alignment process of the tank and the manhole, the horizontal, vertical and outline laser guides can be turned on.

[0077] The horizontal laser guide emits a horizontal laser parallel to the platform floor. This laser guide is convenient for checking whether the platform has surpassed the highest point of the tank body after the platform is lifted and before the tank is put on. When the horizontal laser line is shot above the highest point of the tank body, it means that the platform floor has surpassed the highest point of the tank body, and the tank can be put on; when the horizontal laser line is shot on the tank body below the highest point of the tank body, it means that the platform floor has not surpassed the highest point of the tank body, and the tank cannot be put on.

[0078] The vertical laser guide emits a laser perpendicular to the center line of the platform. This laser guide facilitates the operator to control the overall structure to fit the tank in the correct direction during the process of the platform fitting the tank. When the vertical laser line is shot at the center of the tank, it means that the direction of the overall structure is not deviated. When the vertical laser line is not parallel to the tank, the operator needs to adjust the rotation of the overall structure to align in the correct direction. When the vertical laser line is parallel to the tank but not in the center of the tank, the operator needs to adjust the lateral movement of the overall structure of the platform to align in the correct direction.

[0079] The outline laser outlines the width of the left and right legs. When human operating errors make the vertical laser line not completely parallel to the tank body and coincide with the center of the tank body, the tank-mounted operation can be performed with the existence of a small deviation. In this case, as long as the outline laser fails to hit the vehicle body, it can be assumed that the left and right legs will not touch the vehicle body.

[0080] 5. Drive system

[0081] The drive system includes: relays, motor drivers

[0082] Relay:

[0083] When controlling the movement of the overall structure and the lifting of the platform, the central controller controls the sound and light warning device through the relay to issue a sound and light warning to ensure that there is no risk of injury to personnel around the operating structure. The sound and light warning device uses a buzzer alarm and an alarm light, or a voice prompt alarm and an alarm light; when the limit switch is activated, or the distance detection is too close, the alarm will sound an alarm to remind the operator not to operate in the wrong direction.

[0084] When the control platform is performing tank and manhole alignment operations, the central controller controls the horizontal, vertical, and outline laser transmitters to emit lasers through relays, thereby realizing horizontal, vertical, and outline laser guidance, ensuring that the leg frame and platform of the working platform will not touch the vehicle body, thereby avoiding safety issues that may be caused by collisions.

[0085] Motor driver: When controlling the movement of the overall structure and the lifting of the platform, it is necessary to drive the drive motor of the wheel drive device in the Mecanum wheel mechanism and the lifting motor in the lifting system respectively to adjust the speed and direction. The central controller collects the input system control signal, processes and calculates the data, and then transmits the control signal to the motor driver to control the corresponding motor to adjust the direction and speed corresponding to the input system.

[0086] The working process of the present invention is as follows:

[0087] The tank truck inspection safety work platform provides a safe and reliable working environment for tank truck inspectors. After the tank truck is parked in the inspected parking space, the inspector climbs onto the platform and lifts the platform to the top by pressing the platform lift button on the operating platform. The universal industrial handle on the operating platform controls the universal movement of the safety work platform to the rear of the tank truck. The horizontal laser guide, vertical laser guide, and outline laser guide are turned on. The position of the safety work platform is adjusted so that the horizontal laser light exceeds the highest point of the tank body and the vertical laser light is basically aligned with the center line of the tank body. The outline laser line is observed to ensure that it does not overlap with the vehicle body parts before the tank cover operation can be performed.

[0088] After the inspector has completed the operation of the safe working platform on the tank, he uses the universal industrial handle to visually check whether the working opening on the platform can be docked with the manhole on the tank body. After ensuring that the working opening can be docked with the manhole without touching, the distance measurement module detects that there is a tank body under the platform. The inspector can open the platform floor protection cover to prevent the risk of personnel falling when the platform floor protection cover is opened when there is no tank body under the platform. The inspector controls the platform lifting button to lower the platform. During the descent, the distance measurement module detects the distance from the platform floor to the tank body in real time, and the alarm can output a warning sound according to the range of the detection distance.

[0089] When the working opening is docked with the manhole cover and lowered, the inspector can use the electric tools on the safe working platform to dismantle the manhole cover of the tank truck, lift the manhole cover with the electric hoist, and place the manhole cover in a safe position on the safe working platform. The inspector tightens the safety belt hanging from the electric hoist and controls the electric hoist to transport the inspector to the inside of the tank truck. A blower is also provided on the safe working platform to introduce the air duct into the tank. The blower blows air inward with positive pressure to provide fresh air for the inspectors in the tank to avoid oxygen deficiency and suffocation caused by residual gas or high-temperature closed environment.

[0090] The safety work platform is equipped with emergency rescue equipment, such as oxygen cylinders, first aid kits, rescue stretchers, and fire extinguishers. If the inspector is physically unwell or has an environmental accident, the inspector can be fastened with a safety belt and lifted to the safety work platform by an electric hoist for first aid, ensuring the golden rescue time.

[0091] The safe working platform provides a stable and reliable platform structure for tank truck inspectors. A ladder is set inside the safe working platform. When inspectors need to take a break from work or get tools, they can go up and down the platform through the ladder without moving the entire structure.

[0092] When the inspection of the tank truck is completed, the inspector controls the platform lifting button to lift the safety work platform. After observing that the horizontal laser light exceeds the parts above the tank body, the inspector controls the universal industrial handle to move the safety work platform out of the tank area, and controls the platform lifting button to lower the safety work platform until the inspector can reach the ground.

[0093] If the manhole cover is behind the tank, the center door on one side of the safety work platform can be opened, and the inspector can control the universal industrial handle to move the safety work platform to the rear of the tank. After accurate alignment, the manhole cover can be removed and the inspector can enter and exit.

Claims

1. A universally movable tank truck inspection safety work platform, characterized by: It includes four parts: a leg frame, a platform, a support frame, and a chassis; the chassis is divided into a left chassis and a right chassis, the leg frame is divided into a left leg frame and a right leg frame, and the support frame is divided into a front support frame and a rear support frame; the left and right ends of the front support frame are respectively fixed to the front side of the upper ends of the left and right leg frames, and the left and right ends of the rear support frame are respectively fixed to the rear side of the upper ends of the left and right leg frames, the front and rear support frames are symmetrical, and the front and rear support frames and the left and right leg frames form a door-shaped structure; the platform is assembled between the left and right leg frames through a lifting mechanism, and the platform is box-shaped, and its four sides are surrounded The wall and the lower bottom adopt a steel frame structure, with a crossbeam on the top, a platform floor on the lower bottom, a rectangular working opening corresponding to the manhole above the tank body in the middle of the platform floor, a movable connection protective cover on the working opening, a side door on the side of the platform, and a center split door in front of the platform; the left and right chassis are respectively assembled at the bottom of the left and right leg frames, and the left and right chassis include a supporting bottom plate and a universally movable wheel mechanism assembled under the supporting bottom plate, and the universally movable wheel mechanism includes a universally movable wheel and a wheel drive device; The left and right leg frames include support angle steels, ladders, guide channel steels, and top connecting plates; the support angle steels on each leg frame are distributed and arranged, with at least 2 or more, and the upper and lower ends of each support angle steel are respectively assembled and fixed on the connecting plate and the supporting bottom plate; a ladder is assembled on either the left or right leg frame or on both leg frames, and the ladder is located in the middle of the outer side of the leg frame, and its upper and lower ends are respectively fixedly connected to the connecting plate and the supporting bottom plate; 2 guide channel steels are arranged on each side of the left and right leg frames, and the 2 guide channel steels on each side are respectively located at the two ends of the inner side of the leg frame, and their upper and lower ends are respectively fixed to the connecting plate and the supporting bottom plate; The universally movable wheel mechanism and the lifting mechanism both adopt an electrical control system, which includes a power supply system, an input system, a central controller, and a drive system; the output end of the input system is connected to the input end of the central controller, the output end of the central controller is connected to the input end of the drive system, and the output end of the drive system is respectively connected to the input end of the lifting mechanism and the universally movable wheel mechanism to control the action of the system; The central controller comprises an input photoelectric coupler, an input serial interface, an input CAN bus interface, a single-chip microcomputer, an output photoelectric coupler and an output CAN bus interface; the output ends of the input photoelectric coupler, the input serial interface and the input CAN bus interface are respectively connected to the input end of the single-chip microcomputer, and the output end of the single-chip microcomputer is respectively connected to the output photoelectric coupler and the output CAN bus interface; The central controller and the power supply system are assembled in a chassis and installed in the platform; the power supply system includes a transformer and a power switch to supply power to various parts of the working platform; the input system includes a position limiter and an operation console; the position limiter includes a limit switch installed at the top and bottom of the inner side of the left and right leg frames to limit the platform lifting limit position; a distance measuring module installed in the middle of the bottom of the platform to detect the distance between the platform and the tank body; a limit switch installed at the edge of the inner side of the left and right leg frames to detect the limit position of the inner side of the left and right leg frames to the vehicle body; the operation console is provided with various operation switch elements for controlling the platform action, which is installed on the platform; the drive system includes a motor driver; A horizontal laser emitter, a vertical laser emitter, and a contour laser emitter are also provided on the platform. Relays are correspondingly arranged in the drive system of the control system. The central controller controls the horizontal, vertical, and contour laser emitters through relays to respectively emit laser lines, thereby realizing horizontal, vertical, and contour laser guidance respectively. The horizontal laser emitter is installed on the bottom surface of the platform, flush with the lowest point of the platform; the vertical laser emitter is installed on the upper part of the platform, located in the lateral center of the platform, and the emitted vertical laser light is perpendicular to the lateral direction of the platform; the contour laser emitter is installed on both sides of the bottom surface of the platform, located at the innermost edge of the leg frame, and the emitted contour laser light is flush with the innermost edge of the leg frame.

2. The universally movable tank truck inspection safety work platform according to claim 1 is characterized by: The working opening comprises an opening in the center of the platform floor, and an equal width strip opening in the center of the side wall connected to the opening in the center of the platform floor. The height of the opening on the side wall is at least enough to accommodate the protruding part of the curved surface of the tank top with a manhole, so as to facilitate the operator to smoothly enter the tank. A movable protective cover is provided on the opening in the center of the platform floor.

3. The universally movable tank truck inspection safety work platform according to claim 1 is characterized by: The lifting mechanism includes a guide bearing, a lifting reducer, a screw, a lifting motor, and a lifting connecting shaft; wherein the screw is installed in the middle of the inner side of the left and right leg frames, one on the left and one on the right; 4 guide bearings are respectively installed on the outer sides of the left and right sides of the platform, and each pair of two is arranged in the groove of the guide channel steel and is in sliding contact with the guide channel steel; the lifting motor is installed and fixed on the top beam of the platform, the lifting motor is connected to the lifting connecting shaft through a coupling, the lifting connecting shaft is connected to the lifting reducer, the lifting reducer is fixed on both sides of the platform, the lifting reducer is sleeved with the screw, and the lifting reducer is a worm gear reducer.

4. The universally movable tank truck inspection safety work platform according to claim 1 is characterized by: The universally movable wheel mechanism adopts a Mecanum wheel and a corresponding wheel drive device. The wheel drive device is a power drive component of the Mecanum wheel, which includes a reducer and a drive motor. The inner shaft of the Mecanum wheel is connected to the reducer through a coupling, and the reducer is connected to the drive motor through a flange. The drive motor is forward, reverse, and speed-changed through a signal output by a control system. The hub direction of the Mecanum wheel is perpendicular to the long side direction of the chassis. Two Mecanum wheels are installed on each left and right chassis, for a total of four wheels.

5. The universally movable tank truck inspection safety work platform according to claim 1 is characterized by: An audible and visual warning device is also provided on the platform and is arranged in the operating console; a relay is correspondingly arranged in the driving system of the control system, and the central controller controls the audible and visual warning device through the relay to issue an audible and visual warning.

6. The universally movable tank truck inspection safety work platform according to claim 1 is characterized by: The operating console is equipped with a universal industrial handle, platform lifting button, emergency stop switch, and laser guide switch; Universal industrial handle: adopts multi-axis Hall-type industrial joystick, and the universal industrial handle outputs coordinate value data to the central controller; The platform lifting buttons include a lifting button, a lowering button, and an enabling button, which respectively output lifting signals, lowering signals, and enabling signals to the central controller; The emergency stop switch directly connects the 220V power supply to the transformer power line. When an emergency occurs, pressing the emergency stop switch will disconnect the power supply; The laser guide switch is used to turn on the horizontal, vertical and outline laser guides during the alignment of the tank and the manhole.

7. The universally movable tank truck inspection safety work platform according to claim 1 is characterized by: The distance measurement module of the detection platform from the tank body in the input system is implemented by any one of the four methods: laser, infrared, ultrasonic wave, and radar.

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