A tower crane lifting height detection device

Abstract

The utility model relates to the technical field of tower crane lifting height detection, specifically a tower crane lifting height detection device, including a metering module and a circle counting module, the metering module includes a frame, a rope drum movably installed inside the frame, a mounting plate installed on one side of the frame, a motor connected between the rope drum and the mounting plate, and a timer connected to the top of the motor. In the utility model, when the motor relaxes the rope drum, the number of circles marked on the rope drum is remembered by the circle counting sensor, and the external PLC multiplies the number of circles by the circumference (the length of the rope rotating on the rope drum) to obtain the height of the lifting part reaching the ground. At the same time, the timer transmits the working time of the motor to the external PLC, and then multiplies the working time by the length of the rope wound by the motor per minute, so that the height of the lifting part reaching the ground can be obtained. By comparing the two results, the accuracy of the detection result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tower crane lifting height detection, in particular to a tower crane lifting height detection device. Background Art

[0002] The structure of a tower crane consists of a lifting mechanism, a luffing mechanism, a slewing mechanism and a jacking mechanism. Each mechanism is an important part of the tower crane, and one of the mechanisms with the highest working frequency is the lifting mechanism. The performance of the tower crane's lifting mechanism determines the lifting performance of the tower crane.

[0003] Application No. CN202020461538.3 provides a lifting height measuring device and a crane, which relates to the technical field of lifting devices. The lifting height measuring device provided by the utility model includes: a lifting guide wheel and a detection component, the lifting guide wheel is used to support the wire rope, and the detection component is used to detect the number of rotations of the lifting guide wheel. The lifting height measuring device provided by the utility model alleviates the technical problem of manually calibrating the upper and lower limits of the tower crane in the related technology, which is a cumbersome process. This application relies on only one measurement method, resulting in inaccurate height detection results, which affects the construction judgment of on-site personnel. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A tower crane lifting height detection device includes a metering module and a turn counting module, wherein the metering module includes a frame, a rope drum movably installed inside the frame, a mounting plate installed on one side of the frame, a motor connected between the rope drum and the mounting plate, and a timer connected to the top of the motor; the turn counting module includes a multi-section electric push rod connected to the mounting plate, a strut connected to the movable end of the multi-section electric push rod, a rope hoop connected to the outer end of the strut, a turn counting sensor passing through the top of the frame, and a mark connected to the rope drum, wherein the mark is arranged at the bottom of the turn counting sensor.

[0007] By adopting the above technical solution, when the motor relaxes the rope drum, the number of turns marked on the rope drum is remembered by the turn counting sensor, and the external PLC multiplies the number of turns by the circumference (the length of the rope when it rotates one circle on the rope drum) to obtain the height of the lifting part reaching the ground. At the same time, the timer transmits the working time of the motor to the external PLC, and then multiplies the working time by the length of the rope reeled by the motor per minute to obtain the height of the lifting part reaching the ground. By comparing the two results, the accuracy of the detection results is improved.

[0008] In a preferred example, the utility model can be further configured as follows: connecting shafts are provided on both sides of the rope winding drum, and the connecting shafts are fixedly connected to the frame.

[0009] In a preferred example, the utility model can be further configured as follows: a plurality of threaded holes are provided on the mounting plate, and the motor is located between the plurality of threaded holes.

[0010] In a preferred example, the utility model can be further configured as follows: the support rod is arranged obliquely, and the outer end of the support rod extends to the inside of the rope winding drum.

[0011] In a preferred example, the utility model can be further configured as follows: the multi-section electric push rod is connected in series with the motor, and the motor is electrically connected to an external power supply.

[0012] In a preferred example, the utility model can be further configured as follows: the turn counting sensor is connected in series with a timer, and the timer is electrically connected to an external PLC.

[0013] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0014] 1. In the utility model, when the motor loosens the rope drum, the number of turns marked on the rope drum is remembered by the turn counting sensor, and the external PLC multiplies the number of turns by the circumference (the length of the rope rotating on the rope drum for one turn) to obtain the height of the lifting part reaching the ground. At the same time, the timer transmits the working time of the motor to the external PLC, and then multiplies the working time by the length of the rope wound by the motor per minute to obtain the height of the lifting part reaching the ground. By comparing the two results, the accuracy of the detection results is improved.

[0015] 2. In the utility model, when the lifting part rises / falls, the motor will start, and then the motor controls the rope on the rope drum to lengthen, and this process continues until the bottom end of the rope contacts the ground, thereby knowing the height of the lifting part from the ground. The utility model has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the metering module of the utility model;

[0018] Figure 3 This is a schematic diagram of the circle counting module of the utility model;

[0019] Figure 4 For this utility model Figure 3 A-section structure enlarged view.

[0020] Reference numerals:

[0021] 100, metering module; 110, frame; 120, rope drum; 130, mounting plate; 140, motor; 150, timer;

[0022] 200, a lap counting module; 210, a multi-section electric push rod; 220, a support rod; 230, a rope hoop; 240, a lap counting sensor; 250, a label. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0024] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0025] A tower crane lifting height detection device provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0026] Embodiment 1:

[0027] Combination Figure 1-4 As shown, the utility model provides a tower crane lifting height detection device, including a metering module 100 and a circle counting module 200, wherein the metering module 100 includes a frame 110, a rope drum 120 movably installed inside the frame 110, a mounting plate 130 installed on one side of the frame 110, a motor 140 connected between the rope drum 120 and the mounting plate 130, and a timer 150 connected to the top of the motor 140;

[0028] The circle counting module 200 includes a multi-section electric push rod 210 connected to the mounting plate 130, a support rod 220 connected to the movable end of the multi-section electric push rod 210, a rope hoop 230 connected to the outer end of the support rod 220, a circle counting sensor 240 passing through the top of the frame 110, and an identification mark 250 connected to the rope winding drum 120, and the identification mark 250 is arranged at the bottom of the circle counting sensor 240.

[0029] Furthermore, the support rod 220 is arranged at an angle, and the outer end of the support rod 220 extends into the rope winding drum 120. With this layout design, when the motor 140 winds up the rope winding drum 120, the cable can be evenly wound on the rope winding drum 120.

[0030] Furthermore, the multi-section electric push rod 210 is connected in series with the motor 140, and the motor 140 is electrically connected to an external power source. With this structural design, the device is more convenient to use.

[0031] Furthermore, the circle counting sensor 240 is connected in series with the timer 150, and the timer 150 is electrically connected to the external PLC. With this structural design, the circle counting sensor 240 and the timer 150 are started and shut down at the same time, ensuring the accuracy of the detection result when detecting the height.

[0032] Embodiment 2:

[0033] Combination Figure 1-3 As shown, on the basis of the first embodiment, coupling shafts are provided on both sides of the rope winding drum 120, and the coupling shafts are fixedly connected to the frame 110. The provision of the coupling shafts can improve the structural firmness of the frame 110.

[0034] Embodiment three:

[0035] Combination Figure 1-3 As shown, in the above embodiment, a plurality of threaded holes are provided on the mounting plate 130, and the motor 140 is located between the plurality of threaded holes. The threaded holes are provided to facilitate connection of the mounting plate 130 with the lifting part of an external tower crane.

[0036] The working principle and use process of the utility model are as follows: when the device is put into actual use, the mounting plate 130 is connected to the lifting part of the tower crane through the threaded hole, and then the lifting part rises / falls, the motor 140 will start, and then the motor 140 controls the length of the rope on the rope drum 120, and the process continues until the bottom end of the rope contacts the ground, and then the motor 140 is turned off. During this process, the number of revolutions of the mark 250 on the rope drum 120 is remembered by the revolution counting sensor 240, and the external PLC multiplies the number of revolutions by the circumference (the length of the rope rotating one circle on the rope drum 120) to obtain the height of the lifting part reaching the ground. At the same time, the timer 150 transmits the working time of the motor 140 to the external PLC, and then the working time is multiplied by the length of the rope wound by the motor 140 per minute, and the height of the lifting part reaching the ground can be obtained. By comparing the two results, the accuracy of the detection results is improved.

[0037] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tower crane lifting height detection device, characterized in that: It comprises a metering module (100) and a lap counting module (200), The metering module (100) comprises a frame (110), a rope drum (120) movably mounted inside the frame (110), a mounting plate (130) mounted on one side of the frame (110), a motor (140) connected between the rope drum (120) and the mounting plate (130), and a timer (150) connected to the top of the motor (140); The lap counting module (200) comprises a multi-section electric push rod (210) connected to the mounting plate (130), a support rod (220) connected to the movable end of the multi-section electric push rod (210), a rope hoop (230) connected to the outer end of the support rod (220), a lap counting sensor (240) passing through the top of the frame (110), and an identification mark (250) connected to the rope winding drum (120), wherein the identification mark (250) is arranged at the bottom of the lap counting sensor (240).

2. A tower crane lifting height detection device according to claim 1, characterized in that: Connecting shafts are provided on both sides of the rope winding drum (120), and the connecting shafts are fixedly connected to the frame (110).

3. A tower crane lifting height detection device according to claim 1, characterized in that: The mounting plate (130) is provided with a plurality of threaded holes, and the motor (140) is located between the plurality of threaded holes.

4. A tower crane lifting height detection device according to claim 1, characterized in that: The support rod (220) is arranged obliquely, and the outer end of the support rod (220) extends into the interior of the rope winding drum (120).

5. The tower crane lifting height detection device according to claim 1, characterized in that: The multi-section electric push rod (210) is connected in series with the motor (140), and the motor (140) is electrically connected to an external power source.

6. A tower crane lifting height detection device according to claim 1, characterized in that: The revolution counting sensor (240) is connected in series with the timer (150), and the timer (150) is electrically connected to an external PLC.

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