Warning system for crown block operation process

Abstract

The utility model discloses a warning system for a crown block operation process, which comprises at least four laser projection units arranged on the periphery of a crown block moving trolley, each laser projection unit comprises a mounting seat, a guide post is arranged on each mounting seat, and the top of each guide post is connected with the corresponding mounting seat through a spherical hinge assembly. A laser generator and a camera are arranged on the mounting seat; the lasers projected by the plurality of laser generators on the ground form a rectangle, and the camera is used for detecting whether people enter the range of the rectangle or not; a buzzer is arranged on the mounting seat and is electrically connected with the PLC; and the PLC is used for converting a signal which is acquired by the camera and indicates that a person enters the rectangular range into an electric signal for controlling the buzzer to work. According to the utility model, a safe area can be divided when the crown block is used for hoisting and feeding, personnel entering a non-safe area can be detected, an alarm can be given, the personnel can be prompted to reasonably avoid, and meanwhile, the shutdown operation of the crown block is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of gypsum board production and feeding, in particular to a warning system for an overhead crane operation process. Background Art

[0002] Because the production of gypsum boards requires the transportation of auxiliary materials such as starch, glass fiber, and quicklime to high platforms, and the positions on the production line below often need to move around, there are no alarms or monitoring when the overhead crane loads the materials, which can easily cause injuries from falling objects.

[0003] In the existing technical solution, an alarm light is installed under the loading platform. When the overhead crane is remotely controlled by the post, the alarm will continue to sound after the equipment operation signal is detected. At the same time, intelligent monitoring is installed to monitor the area under the overhead crane. When the camera recognizes that someone is working under the overhead crane, a signal is immediately sent out. If the overhead crane is in motion at this time, the remote control is immediately interrupted.

[0004] The main problem is that the existing system can only provide reminders, but cannot guide personnel to the safe area. In addition, the existing system needs to stop and avoid when personnel are detected entering, which obviously affects the loading efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a warning system for the operation process of an overhead crane to solve the technical problems in the prior art that, since it can only simply provide a reminder of the operation of the overhead crane and cannot guide personnel to a safe area, and the prior art needs to stop the machine to avoid personnel entering when the entry is detected, thus affecting the efficiency of gypsum board production and feeding.

[0006] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0007] A warning system for an overhead crane operation process, comprising:

[0008] At least four laser projection units, and at least four of the laser projection units are arranged around the overhead traveling vehicle;

[0009] The laser projection unit includes a mounting seat, a guide column is arranged on the mounting seat, the top of the guide column is connected to the mounting seat through a ball joint assembly, a laser generator and a camera are arranged on the mounting seat, and the laser generator and the camera are connected to the PLC controller of the overhead crane;

[0010] The lasers projected on the ground by the multiple laser generators form a rectangle, and the range of the rectangle includes and is larger than the projection range of the goods hoisted by the mobile trolley on the ground, and the camera is used to detect whether there is a person entering the range of the rectangle;

[0011] A buzzer is provided on the mounting seat, and the buzzer is electrically connected to the PLC controller;

[0012] The PLC controller is used to convert the signal collected by the camera indicating that a person has entered the range of the rectangle into an electrical signal for controlling the operation of the buzzer.

[0013] As a preferred solution of the utility model, it also includes a follow-up adjustment mechanism, the follow-up adjustment mechanism includes a collar, the collar is provided with an opening for the mobile trolley hoisting cable to pass through, the collar is circumferentially connected with connecting rods of the same number as the laser projection unit, the connecting rods are movably connected to the collar, and the other end of the connecting rods is movably connected to the guide column;

[0014] The hoisting cable of the mobile trolley is tilted relative to the vertical direction to exert a force on the ring, so that the connecting rod drives the guide column to rotate at an angle under the cooperation of the ball joint assembly.

[0015] As a preferred solution of the utility model, the connecting rod is specifically an electric push rod, the fixed end of the electric push rod is movably connected to the ring, the telescopic end of the electric push rod is movably connected to the guide column, and the electric push rod is electrically connected to the PLC controller.

[0016] As a preferred solution of the utility model, the ball seat of the ball joint assembly is installed on the mounting seat, and the ball pin of the ball joint assembly is connected to the end of the guide column.

[0017] As a preferred solution of the utility model, a rectangular frame is installed on the overhead travelling carriage, and the laser projection unit is arranged on four outer sides of the rectangular frame.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model can divide the safe area when the overhead crane is hoisting and loading materials, can detect the personnel entering the unsafe area and give an alarm, and can prompt the personnel to reasonably avoid it, and at the same time, the overhead crane does not need to be stopped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0021] Figure 1It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the utility model provided with a follow-up adjustment mechanism;

[0023] Figure 3 It is a schematic diagram of the longitudinal section structure of the mounting base according to an embodiment of the utility model.

[0024] The numbers in the figure represent the following:

[0025] 10-mounting seat; 20-guide column; 30-ball joint assembly; 40-laser generator; 50-camera; 60-buzzer; 70-following adjustment mechanism; 80-rectangular frame;

[0026] 71-ring; 72-opening; 73-connecting rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figures 1 to 3 As shown, the utility model provides a warning system for the operation process of an overhead crane, comprising:

[0029] At least four laser projection units, and at least four laser projection units are arranged around the overhead traveling vehicle;

[0030] The laser projection unit includes a mounting base 10, on which a guide column 20 is arranged. The top of the guide column 20 is connected to the mounting base 10 through a ball joint assembly 30. The mounting base 10 is provided with a laser generator 40 and a camera 50, which are connected to the PLC controller of the overhead crane.

[0031] The lasers projected on the ground by the multiple laser generators 40 form a rectangle, and the range of the rectangle includes and is larger than the projection range of the goods hoisted by the mobile cart on the ground. The camera 50 is used to detect whether there is anyone entering the range of the rectangle.

[0032] A buzzer 60 is disposed on the mounting base 10 , and the buzzer 60 is electrically connected to the PLC controller.

[0033] The PLC controller is used to convert the signal of a person entering a rectangular range collected by the camera 50 into an electrical signal for controlling the operation of the buzzer 60 .

[0034] The utility model can divide the safety area for hoisting goods on the ground by arranging laser generators 40, specifically straight line lasers, around the overhead traveling trolley.

[0035] The division is mainly based on the height, speed and size of the hoisted cargo. According to the height and size of the hoisted cargo, the projection range of the cargo on the ground can be known. According to the hoisting speed and height, the distance of the cargo falling to the ground in a hypothetical state can be known according to the parabola principle (without considering the splashing range of the cargo itself being broken). The safe area is divided when the overhead crane is hoisting and loading materials. The range divided by multiple lasers 40 belongs to the unsafe area, and the range outside the divided range belongs to the safe area. The camera 50 or the human body sensor can be used to detect the person or state entering the unsafe area, and then the buzzer 60 can be controlled to sound an alarm, and the person can be prompted to reasonably avoid it. At the same time, the overhead crane does not need to be stopped.

[0036] Of course, the actual movement of the overhead crane is very complex, including shutdown conditions. In this case, the hoisted material will move due to inertia, and the real-time safety range of the actual hoisted material will change. In order to be able to determine the changes in the safety range caused by inertia in real time.

[0037] The utility model also includes a follow-up adjustment mechanism 70, which includes a ring 71. The ring 71 is provided with an opening 72 for the mobile trolley hoisting cable to pass through. The ring 71 is circumferentially connected with connecting rods 73 with the same number as the laser projection unit. The connecting rods 73 are movably connected to the ring 71, and the other end of the connecting rods 73 is movably connected to the guide column 20.

[0038] The lifting cable of the mobile trolley is tilted relative to the vertical direction to exert a force on the ring 71 , so that the connecting rod 73 drives the guide column 20 to rotate at an angle with the cooperation of the ball joint assembly 30 .

[0039] The utility model provides an embodiment of a connecting rod 73, which can be an electric push rod capable of actively controlling its length. The fixed end of the electric push rod is movably connected to a ring 71, the telescopic end of the electric push rod is movably connected to a guide column 20, and the electric push rod is electrically connected to a PLC controller.

[0040] Furthermore, in the utility model, the angles of the multiple guide posts 20 are adjusted during the linkage process after being subjected to force with the collar 71, thereby completing the adjustment of the positions of the multiple guide posts 20 (equivalent to the adjustment of the relative angle between the plane where the mounting seat 10 is located and the plane where the guide posts 20 are located).

[0041] Its main purpose is that when the cargo hoisted by the cable on the mobile trolley of the overhead crane changes position under the action of inertia, the cable will generate a force on the ring 71 to change the position of the ring 71, that is, the angle between the plane where the ring 71 is located and the horizontal plane changes, then the ring 71 acts on the connecting rod 73 accordingly, and the connecting rod 73 drives the guide column 20 to adjust the above position, and the adjustment has multiple degrees of freedom. For this reason, the end of the guide column 20 in the utility model is connected to the mounting seat 10 through a ball joint assembly.

[0042] The specific structures of the mounting seat 10 and the guide column 20 can be designed according to actual needs.

[0043] The ball seat of the ball joint assembly 30 is installed on the mounting seat 10 , and the ball pin of the ball joint assembly 30 is connected to the end of the guide column 20 .

[0044] Furthermore, since the structures and shapes of the moving trolleys of different overhead cranes are not the same, and since multiple laser projection units need to be installed, a rectangular frame 80 is installed on the overhead crane moving trolley in the utility model, and laser projection units are arranged on the four outer sides of the rectangular frame 80. The purpose of the rectangular frame 80 is to provide a regular installation of the laser projection unit, so as to better control the parts of the laser projection unit and perform regular rectangular laser projection.

[0045] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A warning system for an overhead crane during operation, characterized in that: include: At least four laser projection units, and at least four of the laser projection units are arranged around the overhead traveling vehicle; The laser projection unit comprises a mounting seat (10), a guide column (20) is arranged on the mounting seat (10), the top of the guide column (20) is connected to the mounting seat (10) via a ball joint assembly (30), a laser generator (40) and a camera (50) are arranged on the mounting seat (10), and the laser generator (40) and the camera (50) are connected to a PLC controller of the overhead travelling crane; The lasers projected on the ground by the plurality of laser generators (40) form a rectangle, and the range of the rectangle includes and is larger than the projection range of the cargo hoisted by the mobile trolley on the ground, and the camera (50) is used to detect whether a person enters the range of the rectangle; A buzzer (60) is provided on the mounting seat (10), and the buzzer (60) is electrically connected to the PLC controller; The PLC controller is used to convert the signal collected by the camera (50) indicating that a person has entered the range of the rectangle into an electrical signal for controlling the operation of the buzzer (60).

2. The warning system for the operation process of an overhead crane according to claim 1, characterized in that: It also includes a follow-up adjustment mechanism (70), the follow-up adjustment mechanism (70) includes a collar (71), an opening (72) is provided in the collar (71) for the mobile trolley hoisting cable to pass through, the collar (71) is circumferentially connected with connecting rods (73) having the same number as the laser projection unit, the connecting rods (73) are movably connected to the collar (71), and the other end of the connecting rods (73) is movably connected to the guide column (20); The lifting cable of the mobile trolley is tilted relative to the vertical direction to exert a force on the ring (71), so that the connecting rod (73) drives the guide column (20) to rotate at an angle with the cooperation of the ball joint assembly (30).

3. The warning system for the operation process of an overhead crane according to claim 2, characterized in that: The connecting rod (73) is specifically an electric push rod, the fixed end of the electric push rod is movably connected to the ring (71), the telescopic end of the electric push rod is movably connected to the guide column (20), and the electric push rod is electrically connected to the PLC controller.

4. The warning system for the operation process of an overhead crane according to claim 1, characterized in that: The ball seat of the ball joint assembly (30) is mounted on the mounting seat (10), and the ball pin of the ball joint assembly (30) is connected to the end of the guide column (20).

5. The warning system for the operation process of an overhead crane according to claim 1, characterized in that: A rectangular frame (80) is installed on the overhead travelling carriage, and the laser projection unit is arranged on four outer sides of the rectangular frame (80).

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