Tower crane safety monitoring device

Abstract

The utility model provides a safety monitoring device for a tower crane, and belongs to the technical field of tower cranes. Comprising a frame and a safety monitoring mechanism, a bearing platform is installed above the frame, the safety monitoring mechanism comprises a fixing plate, the fixing plate is fixedly installed on the upper surface of the bearing platform, a control motor is fixedly installed on the outer surface of the fixing plate, and a winding roller is installed at the output end of the control motor; the pulley is installed above the bearing platform, a traction rope is arranged on the pulley, a connecting plate is rotatably installed outside the pulley, and the pressure sensor is fixedly installed on the upper surface of the bearing platform. The rotatable pulley is installed on the bearing platform, the rotatable connecting plate is installed outside the pulley, the pressure sensor is installed on the bearing platform, the extrusion time of the connecting plate on the pressure sensor is long, the safety of the tower crane is detected, and the situation that the tower crane is in use when overweight goods are hoisted is avoided; the longer the continuous extrusion time of the connecting plate to the pressure sensor is, the more dangerous is.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, and more specifically, to a tower crane safety monitoring device. Background Art

[0002] As the most commonly used equipment on the construction site, the tower crane provides a lot of convenience. Through the tower crane, the items on the ground can be directly lifted to the roof position, and the materials can be continuously transported to the roof, facilitating the feeding, enabling the staff to continuously supply materials, especially for some heavy materials, such as bricks and bundled steel bars, which can be transported to the roof position by the tower crane, facilitating the feeding, replacing manual feeding, and saving time.

[0003] During the daily use of the tower crane, the motor is used to control the forward and reverse rotation of the round roller to realize the winding and releasing of the pulling rope, and the lifting and placing of the materials. However, there are many types of materials on the construction site, and the weight of the materials is unknown when lifting them. When the weight of the materials exceeds the lifting weight of the tower crane and is forcibly lifted, the tower crane will lose balance and major accidents are likely to occur. Therefore, a tower crane safety monitoring device is proposed to solve the above problems. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a tower crane safety monitoring device that overcomes the above technical problems or at least partially solves the above problems.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a tower crane safety monitoring device, including a frame, and a load-bearing platform is installed above the frame;

[0007] A safety monitoring mechanism, the safety monitoring mechanism includes;

[0008] A fixing plate, the fixing plate is fixedly installed on the upper surface of the load-bearing platform, and a control motor is fixedly installed on the outer surface of the fixing plate, and a winding roller is installed at the output end of the control motor;

[0009] A pulley, the pulley is installed above the load-bearing platform, a traction rope is arranged on the pulley, and a connecting plate is rotatably installed outside the pulley;

[0010] A pressure sensor, the pressure sensor is fixedly installed on the upper surface of the load-bearing platform, and the position of the pressure sensor corresponds to the position of the connecting plate.

[0011] In a preferred embodiment, a rotating shaft is fixedly installed at the output end of the control motor, a winding roller is fixedly installed outside the rotating shaft, and a traction rope is wound on the winding roller.

[0012] In a preferred embodiment, a positioning plate is fixedly installed on the upper surface of the load-bearing platform. A circular shaft is fixedly installed inside the positioning plate, and a pulley is rotatably installed outside the circular shaft.

[0013] In a preferred embodiment, a connecting rod is fixedly installed outside the pulley. A connecting plate is rotatably installed on the outer surface of the connecting rod. A plurality of pulleys are provided, and the connecting rods on two of the pulleys are rotatably connected to one connecting plate.

[0014] In a preferred embodiment, the pressure sensor is electrically connected to a PLC controller. The PLC controller is fixedly installed inside the box body, and the box body is fixedly installed on the load-bearing platform.

[0015] A heat dissipation mechanism is also installed on the load-bearing platform. The heat dissipation mechanism includes a hollow cylinder, a piston, and an air inlet pipe.

[0016] A hollow bin is fixedly installed on the upper surface of the load-bearing platform. The control motor is arranged inside the hollow bin, and an air outlet pipe is fixedly installed inside the hollow bin. A hollow cylinder is fixedly installed on the upper surface of the load-bearing platform. A piston is slidably installed inside the hollow cylinder, and a piston rod is installed outside the piston.

[0017] The air inlet pipe is fixedly installed outside the hollow cylinder. The inside of the air inlet pipe is communicated with the inside of the hollow cylinder. One-way valves are installed on both the air inlet pipe and the air outlet pipe.

[0018] A tower crane safety monitoring device provided by the present utility model has the following beneficial effects:

[0019] 1. By installing rotatable pulleys on the load-bearing platform, rotatable connecting plates are installed outside the pulleys, and a pressure sensor is installed on the load-bearing platform. The safety of the tower crane is detected by the extrusion duration of the connecting plate on the pressure sensor, avoiding the danger of lifting overweight goods during the use of the tower crane. The longer the connecting plate continuously presses the pressure sensor, the more dangerous it is.

[0020] 2. By installing a hollow cylinder on the load-bearing platform, a movable piston is installed inside the hollow cylinder, and the piston is fixedly connected to the piston rod. When the connecting plate rotates, the piston rod is pushed, enabling the piston rod to drive the piston to move back and forth inside the hollow cylinder, facilitating the delivery of the gas inside the hollow cylinder to the inside of the hollow bin, facilitating the cooling of the control motor, and prolonging the service life of the control motor. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings;

[0022] Figure 1 is the front view structural schematic diagram of the present utility model;

[0023] Figure 2 is the schematic diagram of the position of the PLC controller of the present utility model;

[0024] Figure 3 is the schematic diagram of the bottom structure of the hollow bin of the present utility model;

[0025] Figure 4 is the schematic diagram of the load-bearing platform structure of the present utility model;

[0026] Figure 5 is the present utility model Figure 4 The enlarged structural schematic diagram at position A in;

[0027] Figure 6 is the schematic diagram of the internal structure of the hollow cylinder of the present utility model;

[0028] In the figure: 1, frame; 2, load-bearing platform; 3, safety monitoring mechanism; 31, fixing plate; 311, control motor; 312, winding roller; 32, pulley; 321, connecting plate; 322, traction rope; 33, pressure sensor; 4, positioning plate; 5, round shaft; 6, connecting rod; 7, PLC controller; 8, box body; 9, heat dissipation mechanism; 91, hollow cylinder; 92, piston; 93, intake pipe; 10, hollow bin; 11, exhaust pipe; 12, piston rod. Specific embodiments

[0029] To make the purposes, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0030] Embodiment

[0031] Refer to Figures 1-6, the present utility model provides a technical solution: a tower crane safety monitoring device, which includes a frame 1 and a safety monitoring mechanism 3, and a load-bearing platform 2 is installed above the frame 1. The safety monitoring mechanism 3 includes a fixing plate 31, the fixing plate 31 is fixedly installed on the upper surface of the load-bearing platform 2, and a control motor 311 is fixedly installed on the outer surface of the fixing plate 31. A winding roller 312 is installed at the output end of the control motor 311. A pulley 32 is installed above the load-bearing platform 2. A traction rope 322 is arranged on the pulley 32. A connecting plate 321 is rotatably installed outside the pulley 32. A pressure sensor 33 is fixedly installed on the upper surface of the load-bearing platform 2, and the position of the pressure sensor 33 corresponds to the position of the connecting plate 321.

[0032] In a preferred embodiment, a rotating shaft is fixedly installed at the output end of the control motor 311, and a winding roller 312 is fixedly installed on the outside of the rotating shaft. The traction rope 322 is wound around the winding roller 312. This device winds and releases the traction rope 322 by controlling the rotation of the winding roller 312. To facilitate the control of the rotation of the winding roller 312, the winding roller 312 is fixedly installed on the rotating shaft, and the rotating shaft is driven by the control motor 311, so as to control the stable rotation of the winding roller 312 and facilitate the lifting of materials.

[0033] In a preferred embodiment, a positioning plate 4 is fixedly installed on the upper surface of the load-bearing platform 2, a round shaft 5 is fixedly installed inside the positioning plate 4, and the pulley 32 is rotatably installed on the outside of the round shaft 5. To make the pulley 32 rotate stably, a positioning plate 4 is fixedly installed on the load-bearing platform 2, and a round shaft 5 is installed inside the positioning plate 4. The pulley 32 is rotatably installed on the round shaft 5. The movement of the traction rope 322 on the pulley 32 will drive the rotation of the pulley 32, which not only stably uses the pulley 32, but also stably pulls and moves the traction rope 322.

[0034] In a preferred embodiment, a connecting rod 6 is fixedly installed outside the pulley 32, and a connecting plate 321 is rotatably installed on the outer surface of the connecting rod 6. A plurality of pulleys 32 are provided, and the connecting rods 6 on two of the pulleys 32 are rotatably connected to a connecting plate 321. This device monitors the extrusion time of the pressure sensor 33 by the connecting plate 321 to judge whether the lifted material is overweight. When the weight of the material exceeds the compliance range, the rotation speed of the winding roller 312 will be reduced, and then the rotation speed of the pulley 32 will be reduced. At this time, the sliding time of the connecting plate 321 on the pressure sensor 33 increases, thereby increasing the extrusion time of the pressure sensor 33. Thus, it can be judged that the lifted goods are overweight. And to facilitate reminding the staff, the pressure sensor 33 is electrically connected to a PLC controller 7. The PLC controller 7 is fixedly installed in a box body 8, and the box body 8 is fixedly installed on the load-bearing platform 2. When the extrusion time of the pressure sensor 33 by the connecting plate 321 is too long, the alarm in the cab will be controlled by the PLC controller 7 to alarm, timely reminding the staff to put the material back on the ground to avoid danger.

[0035] The device drives the winding roller 312 to rotate by controlling the motor 311, realizes the winding and releasing of the traction rope 322, and realizes the lifting and placing of materials. A large amount of heat will be generated when the control motor 311 is in use. To quickly dissipate the heat of the control motor 311, a heat dissipation mechanism 9 is also installed on the load-bearing platform 2. The heat dissipation mechanism 9 includes a hollow cylinder 91, a piston 92 and an air inlet pipe 93. A hollow chamber 10 is fixedly installed on the upper surface of the load-bearing platform 2. The control motor 311 is arranged inside the hollow chamber 10, and an air outlet pipe 11 is fixedly installed inside the hollow chamber 10. The hollow cylinder 91 is fixedly installed on the upper surface of the load-bearing platform 2. The piston 92 is slidably installed inside the hollow cylinder 91. A piston rod 12 is installed outside the piston 92. The air inlet pipe 93 is fixedly installed outside the hollow cylinder 91. The inside of the air inlet pipe 93 communicates with the inside of the hollow cylinder 91. One-way valves are installed on both the air inlet pipe 93 and the air outlet pipe 11.

[0036] During actual use, the pulley 32 rotates to drive the connecting plate 321 to rotate. During the rotation of the connecting plate 321, the piston rod 12 will be pushed. A spring is installed on the piston rod 12. By squeezing the piston rod 12 with the connecting plate 321, the piston rod 12 is made to push the piston 92 to move. The piston 92 presses out the air inside the hollow cylinder 91 and discharges it from the inside of the air outlet pipe 11. The gas enters the inside of the hollow chamber 10, accelerating the gas flow inside the hollow chamber 10, making it disperse from the inside of the through holes, and timely dissipating the heat of the control motor 311.

[0037] Specifically, the working process or working principle of a tower crane safety monitoring device is as follows: During the daily use of the tower crane, the round roller is rotated forward and backward by the motor to realize the winding and releasing of the pulling rope, and the lifting and placing of materials. However, there are many types of materials on the construction site, and the weight of the materials is unknown when lifting the materials. When the weight of the materials exceeds the lifting weight of the tower crane and is forcibly lifted, the tower crane will lose balance and major accidents are likely to occur. Therefore, this device is designed to solve this problem.

[0038] Through this device, the lifting strength of the materials can be detected to avoid danger caused by overweight lifted materials. The specific operation is as follows: Connect the external power supply. When it is necessary to lift the cargo materials, the staff operates the equipment to control the lifting hook on the tower crane to fall. The control motor 311 controls the winding roller 312 to rotate, releases the traction rope 322, and makes the lifting hook move downward. After the fixed rope on the processed material cargo is sleeved on the lifting hook, then control the control motor 311 to rotate in the reverse direction. Through the reverse rotation of the winding roller 312, the traction rope 322 will be wound up and wound around the winding roller 312, thereby pulling the lifting hook upward to facilitate the transfer and placement of the material cargo.

[0039] During the lifting of materials, to avoid danger caused by overweight goods, when the control motor 311 drives the winding roller 312 to rotate, the traction rope 322 will also move on the pulley 32 and drive the pulley 32 to rotate. While the pulley 32 is rotating, it will drive the connecting rod 6 to rotate, and then drive the connecting plate 321 to rotate. When the connecting plate 321 moves to the lower part, it will squeeze the pressure sensor 33. The pressure sensor 33 will detect the existence of pressure. By detecting the duration of the pressure existence through the pressure sensor 33, it is used to monitor the safety of the tower crane.

[0040] When the goods are overweight, the pulling force of the traction rope 322 will be very strenuous, which will cause the rotation speed of the winding roller 312 to decrease, and thus also affect the rotation speed of the pulley 32. Originally, the pressing time of the connecting plate 321 on the pressure sensor 33 each time is 3s. However, in the case of overweight goods, the extrusion time of the connecting plate 321 on the pressure sensor 33 will be extended. At this time, the PLC controller 7 controls the alarm in the cab to alarm, so as to remind the staff that the goods are overweight, stop lifting in time, place the goods on the ground, repack and lift them separately to ensure the safe use of the tower crane and avoid danger.

[0041] When the tower crane is used on the construction site, to avoid the influence of rainwater on the control motor 311, a hollow bin 10 will be installed outside the control motor 311. At the same time, to facilitate heat dissipation, through holes are provided at the bottom of the hollow bin 10. However, when used in summer, due to the high temperature, and the control motor 311 will generate a large amount of heat during operation. To dissipate the heat of the control motor 311 in time, a heat dissipation mechanism 9 is set up in this device to solve this problem.

[0042] When the traction rope 322 is used normally, whether the traction rope 322 lifts or releases the materials, it will drive the pulley 32 to rotate and drive the connecting plate 321 to rotate. During the rotation of the connecting plate 321, it will push the piston rod 12. A spring is installed on the piston rod 12. By squeezing the piston rod 12 by the connecting plate 321, the piston rod 12 is pushed to move the piston 92. The piston 92 presses out the air inside the hollow cylinder 91 and discharges it from the inside of the air outlet pipe 11. The gas enters the inside of the hollow bin 10, accelerating the gas flow inside the hollow bin 10, and making it disperse from the inside of the through hole to dissipate the heat of the control motor 311 in time.

[0043] When the connecting plate 321 disengages from squeezing the piston rod 12, the piston rod 12 will move back under the action of the spring. At this time, the outside air will be inhaled into the inside of the hollow cylinder 91 through the air inlet pipe 93, so that when the connecting plate 321 squeezes the piston rod 12 again, it can continue to transport gas into the inside of the hollow bin 10, thereby enhancing the heat dissipation effect on the control motor 311.

[0044] It should be noted that the control motor 311, the pressure sensor 33, and the PLC controller 7 are devices or equipment existing in the prior art, or devices or equipment that can be realized by the prior art. Their power supply, specific composition, and principle are clear to those skilled in the art, so they will not be elaborated in detail.

Claims

1. A tower crane safety monitoring device, characterized in that: It comprises a frame (1), and a load-bearing platform (2) is installed above the frame (1); A safety monitoring mechanism (3), wherein the safety monitoring mechanism (3) comprises: A fixed plate (31), the fixed plate (31) being fixedly mounted on the upper surface of the load-bearing platform (2), and a control motor (311) being fixedly mounted on the outer surface of the fixed plate (31), and a winding roller (312) being mounted on the output end of the control motor (311); A pulley (32), the pulley (32) being installed above the load-bearing platform (2), a traction rope (322) being arranged on the pulley (32), and a connecting plate (321) being rotatably installed outside the pulley (32); A pressure sensor (33), wherein the pressure sensor (33) is fixedly mounted on the upper surface of the load-bearing platform (2), and the position of the pressure sensor (33) corresponds to the position of the connecting plate (321).

2. The tower crane safety monitoring device according to claim 1, characterized in that: A rotating shaft is fixedly mounted on the output end of the control motor (311), a winding roller (312) is fixedly mounted on the outside of the rotating shaft, and a traction rope (322) is wound around the winding roller (312).

3. The tower crane safety monitoring device according to claim 2, characterized in that: A positioning plate (4) is fixedly mounted on the upper surface of the load-bearing platform (2), a circular shaft (5) is fixedly mounted inside the positioning plate (4), and a pulley (32) is rotatably mounted outside the circular shaft (5).

4. The tower crane safety monitoring device according to claim 3, characterized in that: A connecting rod (6) is fixedly installed on the outside of the pulley (32), and a connecting plate (321) is rotatably installed on the outer surface of the connecting rod (6). The pulley (32) is arranged in a plurality of pieces, wherein the connecting rods (6) on two pulleys (32) are rotatably connected to one connecting plate (321).

5. The tower crane safety monitoring device according to claim 4, characterized in that: The pressure sensor (33) is electrically connected to a PLC controller (7), the PLC controller (7) is fixedly installed in a box (8), and the box (8) is fixedly installed on a load-bearing platform (2).

6. The tower crane safety monitoring device according to claim 5, characterized in that: A heat dissipation mechanism (9) is also installed on the load-bearing platform (2), and the heat dissipation mechanism (9) comprises a hollow cylinder (91), a piston (92) and an air intake pipe (93).

7. The tower crane safety monitoring device according to claim 6, characterized in that: A hollow bin (10) is fixedly mounted on the upper surface of the load-bearing platform (2), the control motor (311) is arranged inside the hollow bin (10), and an air outlet pipe (11) is fixedly mounted inside the hollow bin (10), a hollow cylinder (91) is fixedly mounted on the upper surface of the load-bearing platform (2), a piston (92) is slidably mounted inside the hollow cylinder (91), and a piston rod (12) is mounted outside the piston (92).

8. The tower crane safety monitoring device according to claim 7, characterized in that: An air inlet pipe (93) is fixedly installed outside the hollow cylinder (91), the interior of the air inlet pipe (93) is communicated with the interior of the hollow cylinder (91), and both the air inlet pipe (93) and the air outlet pipe (11) are installed with a one-way valve.

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