Detection safety protection device of tower crane moment limiter

Abstract

The utility model provides a detection safety protection device for a moment limiter of a tower crane, which comprises a distance measuring sensor, a signal receiver, a voltage-stabilized source, a controller, a display, an alarm and a relay, wherein the distance measuring sensor is used for measuring the distance between a metal structure which is deformed under stress of a tower top and an adjusting bolt; the distance measuring sensor is installed on a metal structure, deformed under stress, of the tower top of the tower crane moment limiter and is in signal connection with the controller through the signal receiver, the voltage-stabilized source is connected with the controller, the controller is connected with the displayer, the alarm and the relay, and the relay is connected with the signal receiver. The current load of the tower crane is judged by measuring the distance between a stressed and deformed metal structure at the top of the tower and the adjusting bolt through the distance measuring sensor, an alarm is given according to the load, the operation of the tower crane is correspondingly controlled, and whether the limiter is mechanically damaged or whether someone privately adjusts and amplifies the limit can be effectively detected; and the construction safety of the tower crane is improved.

Description

Technical Field

[0001] The utility model relates to a detection safety protection device for a tower crane moment limiter, belonging to the field of safety control devices. Background Art

[0002] At present, general torque limiters are mechanical, installed on the top of the tower crane, and use the deformation of the metal structure of the tower crane to collide with the travel switch to achieve limit. The torque limit size can be set by adjusting the distance between the bolt and the limit switch. This limiter is easily affected by human interference or mechanical damage, causing the tower crane to operate under excessive torque. Utility Model Content

[0003] The utility model aims to provide a detection safety protection device for a tower crane torque limiter, which can monitor in real time the distance between the metal structure of the tower top that is deformed by force and the adjusting bolt, so as to know the deformation of the metal structure of the tower crane torque limiter and improve the safety of the tower crane.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A detection safety protection device for a tower crane torque limiter comprises a distance sensor for measuring the distance between a metal structure subjected to stress and deformation at the top of a tower crane and an adjusting bolt, a signal receiver, a voltage-stabilized power supply, a controller, a display, an alarm and a relay. The distance sensor is installed on the metal structure subjected to stress and deformation at the top of the tower crane torque limiter, the distance sensor is connected to the controller signal through the signal receiver, the voltage-stabilized power supply is connected to the controller, and the controller is respectively connected to the display, the alarm and the relay.

[0006] Preferably, in the above-mentioned detection safety protection device of the tower crane torque limiter, the distance measuring sensor can send the distance data measured in the empty hook state and the distance data measured in the 100% lifting state to the controller respectively, and the distance measuring sensor can send the distance data measured in real time to the controller.

[0007] Preferably, in the above-mentioned detection safety protection device for the tower crane torque limiter, the controller can determine whether the distance data measured in real time is within the range between the distance data measured in the empty hook state and the distance data measured in the 100% lifting state.

[0008] Preferably, in the above-mentioned detection safety protection device of the tower crane torque limiter, the controller can issue an alarm and cut off the tower crane operation when the distance data measured by the distance measuring sensor is greater than the distance data measured in the empty hook state or the measured distance data does not change for a long time.

[0009] Preferably, in the above-mentioned detection safety protection device of the tower crane torque limiter, the controller can send out an alarm through the alarm and drive the relay to control the tower crane to lift and rise and change the amplitude to the external circuit when the distance data measured by the distance measuring sensor is less than the distance measured in the empty hook state.

[0010] Preferably, in the above-mentioned detection safety protection device for the tower crane torque limiter, the controller is capable of displaying the distance data measured by the distance measuring sensor through a display.

[0011] It can be seen from the above disclosed technical solutions that, compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The utility model provides a detection safety protection device for a tower crane torque limiter, comprising a distance sensor for measuring the distance between a metal structure subjected to stress and deformation at the top of a tower crane and an adjusting bolt, a signal receiver, a voltage-stabilized power supply, a controller, a display, an alarm and a relay. The distance sensor is installed on the metal structure subjected to stress and deformation at the top of the tower crane torque limiter, the distance sensor is connected to the controller signal through the signal receiver, the voltage-stabilized power supply is connected to the controller, and the controller is respectively connected to the display, the alarm and the relay. The distance between the metal structure subjected to stress and deformation at the top of the tower crane and the adjusting bolt (equivalent to detecting the deformation of the metal structure of the tower crane torque limiter) is measured by the distance sensor to judge the current load size of the tower crane, an alarm is given according to the load size and the operation of the tower crane is controlled accordingly, and the limiter can be effectively detected to be mechanically damaged or whether someone privately adjusts and amplifies the limit, thereby improving the safety of tower crane construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic diagram of the structural framework of a detection safety protection device for a tower crane moment limiter according to an embodiment of the present invention.

[0014] In the figure: 1- distance sensor, 2- signal receiver, 3- voltage regulated power supply, 4- controller, 5- display, 6- alarm, 7- relay. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following will be described in detail the technical content and features of the present invention by combining the enumerated embodiments with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. For the convenience of description, the "upper" and "lower" described below are consistent with the upper and lower directions of the accompanying drawings, but this cannot be a limitation of the technical solution of the present invention.

[0016] See also Figure 1The present embodiment discloses a detection safety protection device for a tower crane torque limiter, comprising a distance sensor 1 for measuring the distance between a metal structure (not shown) subjected to stress and deformation at the top of a tower and an adjusting bolt (not shown), a signal receiver 2, a voltage-stabilized power supply 3, a controller 4, a display 5, an alarm 6 and a relay 7. The distance sensor 1 is installed on the metal structure subjected to stress and deformation at the top of a tower crane torque limiter, the distance sensor 1 is connected to the controller 4 through a signal receiver, the voltage-stabilized power supply 3 is connected to the controller 4, and the controller 4 is respectively connected to the display 5, the alarm 6 and the relay 7.

[0017] The utility model provides a detection safety protection device for a tower crane torque limiter, comprising a distance sensor 1 for measuring the distance between a metal structure subjected to stress and deformation at the top of a tower crane and an adjusting bolt, a signal receiver 2, a voltage-stabilized power supply 3, a controller 4, a display 5, an alarm 6 and a relay 7. The distance sensor 1 is installed on the metal structure subjected to stress and deformation at the top of the tower crane torque limiter, the distance sensor 1 is connected to the controller 4 through a signal receiver, the voltage-stabilized power supply 3 is connected to the controller 4, and the controller 4 is respectively connected to the display 5, the alarm 6 and the relay 7. The distance between the metal structure subjected to stress and deformation at the top of the tower crane and the adjusting bolt (equivalent to detecting the deformation of the metal structure of the tower crane torque limiter) is measured by the distance sensor 1 to determine the current load size of the tower crane, an alarm is given according to the load size, and the operation of the tower crane is controlled accordingly. In addition, it can effectively detect whether the limiter is mechanically damaged or whether someone privately adjusts and amplifies the limit, thereby improving the safety of tower crane construction.

[0018] Preferably, in the above-mentioned detection safety protection device of the tower crane torque limiter, the distance measuring sensor 1 can send the distance data measured in the empty hook state and the distance data measured in the 100% lifting state to the controller 4 respectively, and the distance measuring sensor 1 can send the distance data measured in real time to the controller 4.

[0019] Preferably, in the above-mentioned detection safety protection device for the tower crane torque limiter, the controller 4 can determine whether the distance data measured in real time is within the range between the distance data measured in the empty hook state and the distance data measured in the 100% hoisting state.

[0020] Preferably, in the above-mentioned detection safety protection device of the tower crane torque limiter, the controller 4 can issue an alarm and cut off the tower crane operation when the distance data measured by the distance measuring sensor 1 is greater than the distance data measured in the empty hook state or the measured distance data does not change for a long time.

[0021] Preferably, in the above-mentioned detection safety protection device of the tower crane torque limiter, the controller 4 can, when the distance data measured by the distance measuring sensor 1 is less than the distance measured in the empty hook state, send out an alarm through the alarm 6 and drive the relay 7 to control the tower crane's lifting and rising and amplitude change to the external circuit, so as to avoid overloading of the tower crane and improve construction safety.

[0022] Preferably, in the above-mentioned detection safety protection device for the tower crane torque limiter, the controller 4 can display the distance data measured by the distance measuring sensor 1 through the display 5 .

[0023] During use, after the torque debugging of the newly installed tower crane is completed, the controller 4 locks the distance record of the empty hook and 100% lifting weight measured by the sensor. During the use of the tower crane, if the measured distance is greater than the empty hook distance or the measured distance does not change for a long time, it indicates that there may be a problem with the limit and an alarm will be issued to cut off the operation of the tower crane.

[0024] The controller 4 can be used as another set of limit switches based on the obtained distance, and can display the current torque value so that the driver can have a certain understanding of the weight of the hanging object.

[0025] The controller 4 is password locked by a dedicated person to prevent anyone from changing it privately, which can effectively prevent people from adjusting and destroying the limit at will.

[0026] The detection safety protection device of the moment limiter of the tower crane provided by the utility model judges the load size of the tower crane by the distance between the distance sensor 1 installed on the metal structure of the tower top that is deformed by force and the adjusting bolt. When the hook is empty and the amplitude change trolley is at the root, the distance between the distance sensor and the bolt is the largest. The larger the load, the smaller the distance. The distance at 100% load is set as the limit position, an alarm is issued and the relay 7 is driven to control the tower crane to lift and rise and the amplitude change to the outer circuit; if the distance between the sensor and the bolt is greater than the set maximum distance or the distance does not change for a long time during operation, it is judged that the moment limit device is faulty and the tower crane control circuit is cut off and the fault content is displayed on the display screen. After the professional personnel check and eliminate the fault, it is reset, and then the tower crane can continue to operate. This control method effectively prevents the limit value from being artificially enlarged privately and the limit deviation caused by mechanical damage to the limit device, thereby improving the construction safety of the tower crane.

[0027] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A detection safety protection device for a tower crane torque limiter, characterized in that: The invention comprises a distance measuring sensor for measuring the distance between a metal structure subjected to stress and deformation at the top of a tower and an adjusting bolt, a signal receiver, a voltage-stabilized power supply, a controller, a display, an alarm and a relay. The distance measuring sensor is installed on the metal structure subjected to stress and deformation at the top of a tower crane torque limiter. The distance measuring sensor is connected to the controller signal through a signal receiver, the voltage-stabilized power supply is connected to the controller, and the controller is respectively connected to the display, the alarm and the relay.

2. The detection safety protection device for the tower crane torque limiter according to claim 1, characterized in that: The distance measuring sensor can send the distance data measured in the empty hook state and the distance data measured in the 100% hoisting state to the controller respectively, and the distance measuring sensor can send the distance data measured in real time to the controller.

3. The detection safety protection device for the tower crane torque limiter according to claim 1, characterized in that: The controller can determine whether the distance data measured in real time is within the range between the distance data measured in the empty hook state and the distance data measured in the 100% hoisting state.

4. The detection safety protection device for the tower crane torque limiter according to claim 1, characterized in that: The controller can give an alarm and cut off the tower crane operation when the distance data measured by the distance measuring sensor is greater than the distance data measured in the empty hook state or the measured distance data does not change for a long time.

5. The detection safety protection device for the tower crane torque limiter according to claim 1, characterized in that: When the distance data measured by the distance measuring sensor is less than the distance measured in the empty hook state, the controller can send out an alarm through the alarm and drive the relay to control the tower crane to lift up and change the amplitude to the external circuit.

6. The detection safety protection device for the tower crane torque limiter according to claim 1, characterized in that: The controller can display the distance data measured by the distance measuring sensor through the display.

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