Tower crane jacking safety protection control system

Abstract

The utility model discloses a tower crane jacking safety protection control system, which comprises a rotary assembly, a standard knot, a climbing frame, a sensor group, an acousto-optic warning device, a data processor and a display, the rotary assembly comprises a rotary support bearing, an upper support and lower supports, each lower support comprises a first end and a second end, and the first end and the second end are connected with each other. The upper end part of the climbing frame is connected with the first end through a pin shaft, the second end is connected with the standard knot through a bolt, a sensor is arranged at the connecting bolt of each second end and the standard knot, and the sensors form a sensor group. According to the utility model, the bolt tightness between the standard knot and the lower support is detected through the sensor group, the detected data is transmitted to the data processor, and if one of the detected data is not within a preset data range, the climbing frame stops working and is maintained in time; and if the detected data are all within the preset data range, the climbing frame continues to carry out jacking operation, so that faults during jacking operation of the tower crane are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a tower crane jacking safety protection control system. Background Art

[0002] With the development of urbanization and the increasing scarcity of land resources, high-rise and super-high-rise buildings are becoming more and more common. Tower cranes (hereinafter referred to as "tower cranes"), as the most important vertical transportation machinery, are widely used in the construction of industrial and civil high-rise buildings.

[0003] During the use of tower cranes, as the height of the buildings under construction increases, they also need to be continuously raised. Raising the tower crane is a jacking process. Raising and adding sections and lowering and reducing sections of the tower crane both require jacking operations, and tower crane jacking is a regular job. Due to the unfamiliarity of operators, non-standard operations, illegal operations, negligence and other reasons, the boom is often rotated, the trolley is changed and hoisting operations are performed when the slewing support is not connected to the standard section, causing the tower crane climbing frame to derail from the standard section, thereby causing serious accidents such as tower crane collapse. In practice, it is generally necessary to raise several standard sections in a row at a time. During the jacking process, the connecting bolts must be installed and removed many times. Due to human factors, the boom is rotated, the trolley is changed and hoisting operations are performed when the slewing support is not connected to the standard section, which is easy to cause tower crane collapse accidents.

[0004] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which resulted in this case. Utility Model Content

[0005] The purpose of this application is to provide a tower crane jacking safety protection control system in response to the above problems.

[0006] In order to achieve the above object, the utility model adopts the following technical solution:

[0007] A tower crane jacking safety protection control system comprises a slewing assembly, a plurality of vertically stacked standard sections and a climbing frame erected outside the standard sections, the slewing assembly comprises a slewing support bearing and an upper support and a lower support pivotally connected to the upper and lower sides of the slewing support bearing, each of the lower supports comprises a first end close to the slewing support bearing and a second end away from the slewing support bearing, the upper end of the climbing frame is connected to the first end through a pin shaft, and the second end is connected to the standard section through a bolt;

[0008] It also includes a sensor group for sensing the tightness between each standard section and the corresponding second end, an audible and visual warning device for alarm, a data processor for receiving signals from the sensor group and sending signals to the audible and visual warning device, and a display for display. A sensor is installed at the bolt where each second end is connected to the standard section, and each of the sensors constitutes the sensor group.

[0009] Preferably, it also includes 8 logic switches, a normally open contact KA1, a normally open contact KA2, a normally open contact KA3, a normally closed contact KA5, an intermediate relay coil KA, a tower crane slewing mechanism control circuit, a tower crane luffing mechanism control circuit, a tower crane hoisting mechanism control circuit and a hydraulic pump station power supply control circuit, the first contact and the second contact of the normally open contact KA1 are respectively connected in series with the tower crane slewing mechanism control circuit, the first contact and the second contact of the normally open contact KA2 are respectively connected in series with the tower crane luffing mechanism control circuit, the first contact and the second contact of the normally open contact KA3 are respectively connected in series with the tower crane hoisting mechanism control circuit, and the first contact and the second contact of the normally closed contact KA5 are respectively connected in series with the hydraulic pump station power supply control circuit;

[0010] The output end of the data processor is connected in series with the eight logic switches and forms a control loop with the intermediate relay coil KA.

[0011] Preferably, when all eight logic switches are closed, the intermediate relay coil KA is energized and attracted, and is respectively closed with the normally open contact KA1, the normally open contact KA2, and the normally open contact KA3, and is disconnected with the normally closed contact KA5;

[0012] When the intermediate relay coil KA is de-energized and released, it is disconnected from the normally open contact KA1, the normally open contact KA2, and the normally open contact KA3, and closed with the normally closed contact KA5, and the circuits of the tower crane slewing mechanism control circuit, the tower crane luffing mechanism control circuit, and the tower crane lifting mechanism control circuit are all disconnected.

[0013] Preferably, it also includes a normally closed switch KA4 connected in series with the sound and light warning device, and when the power is off and closed, the sound and light warning device emits sound and light.

[0014] Preferably, the data processor presets a standard value of the pre-tightening force of the bolt. When the pre-tightening force of the bolt is greater than or equal to the preset value, it indicates that the bolt is tightened and the corresponding logic switch is closed; when the pre-tightening force of the bolt is less than the preset value, it indicates that the bolt is loosened and the corresponding logic switch is disconnected.

[0015] Preferably, the first end is connected to the climbing frame via four pins, and the second end is connected to the standard section via 4N bolts, where N is 2 or 3.

[0016] Preferably, the bolts are high-strength bolts.

[0017] Preferably, the sensor is a bolt preload sensor, a pressure sensor or a bolt loosening sensor.

[0018] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are: the tightness of the bolts between the standard section and the lower support is detected by the sensor group, and the detected data is transmitted to the data processor. If one of the detected data is not within the preset data range, the intermediate relay coil KA loses power, the normally closed contact KA5 closes, and the climbing frame continues to operate; if the detected data are all within the preset data range, the intermediate relay coil KA is energized, the normally closed contact KA5 is disconnected, and the climbing frame stops operating, thereby effectively avoiding failures during the jacking operation of the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 The electrical schematic diagram of the utility model

[0021] In the figure: standard section 1, climbing frame 2, slewing support bearing 31, lower support 32, first end 321, second end 322, pin shaft 4, bolt 5, jacking hydraulic system 6. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1 to Figure 2

[0024] A tower crane lifting safety protection control system includes a slewing assembly, a plurality of vertically stacked standard sections 1, and a climbing frame 2 erected on the outside of the standard section 1. The slewing assembly includes a slewing support bearing 31 and an upper support and a lower support 32 pivotally connected to the upper and lower sides of the slewing support bearing 31. Each lower support 32 includes a first end 321 close to the slewing support bearing 31 and a second end 322 away from the slewing support bearing 31. The upper end of the climbing frame 2 is connected to the first end 321 through four pins 4, and the second end 322 is connected to the standard section 1 through eight high-strength bolts 5. The purpose of the utility model is to provide a tower crane lifting safety protection control system, which is used to automatically close the illegal operation channel when the tower crane is lifting, so as to ensure the safety of the tower crane lifting. Illegal operation refers to: when the slewing lower support 32 and the tower body standard section 1 are not connected well with high-strength bolts 5, the tower crane is rotated, the amplitude is changed, and the lifting operation is performed.

[0025] Furthermore, it also includes a sensor group for sensing the tightness between each standard section 1 and the corresponding second end 322, an audible and visual warning device for alarm, an execution unit for execution, and a data processor for receiving signals from the sensor group and sending control signals to the audible and visual warning device, as well as a display for displaying the preload data of the sensor group and the status of the bolt 5. A sensor (not shown in the figure) is installed at the bolt 5 connecting each second end 322 and the standard section 1. The execution unit is electrically connected to the data processor. Preferably, the sensor is a washer-type bolt preload sensor installed at the bolt 5 connecting the lower support 32 and the standard section 1, and the number is 8, forming a sensor group. Each sensor collects the preload data of the corresponding bolt 5 and transmits it to the data processor. The execution unit is a jacking hydraulic system 6.

[0026] It is worth mentioning that the sensor in this embodiment can be a bolt preload sensor, a pressure sensor, a bolt loosening sensor, etc., which is used to detect the tightness of the bolts 5 and the pin 4 between the standard section 1 and the lower support 32 during the jacking process, and transmit the preload data to the data processor.

[0027] Furthermore, it also includes 8 logic switches, a normally open contact KA1, a normally open contact KA2, a normally open contact KA3, a normally closed contact KA5, an intermediate relay coil KA, a tower crane slewing mechanism control circuit, a tower crane luffing mechanism control circuit, a tower crane hoisting mechanism control circuit and a hydraulic pump station power supply control circuit, the first contact and the second contact of the normally open contact KA1 are respectively connected in series with the tower crane slewing mechanism control circuit, the first contact and the second contact of the normally open contact KA2 are respectively connected in series with the tower crane luffing mechanism control circuit, the first contact and the second contact of the normally open contact KA3 are respectively connected in series with the tower crane hoisting mechanism control circuit, and the first contact and the second contact of the normally closed contact KA5 are respectively connected in series with the hydraulic pump station power supply control circuit;

[0028] The output end of the data processor is connected in series with 8 logic switches and forms a control loop with the intermediate relay coil KA.

[0029] Preferably, when all eight logic switches are closed, the intermediate relay coil KA is energized and attracted, and is closed with the normally open contact KA1, the normally open contact KA2, and the normally open contact KA3 respectively, and is disconnected with the normally closed contact KA5. At this time, the tower crane can operate normally;

[0030] When the intermediate relay coil KA is de-energized and released, it is disconnected from the normally open contacts KA1, KA2 and KA3 respectively, and closed with the normally closed contact KA5. At this time, the circuits of the tower crane's slewing mechanism control circuit, the tower crane's luffing mechanism control circuit and the tower crane's lifting mechanism control circuit are all disconnected, and the tower crane cannot be operated.

[0031] Preferably, it also includes a normally closed switch KA4 connected in series with the sound and light warning device, and when the power is off and closed, the sound and light warning device emits sound and light.

[0032] Preferably, the data processor presets a standard value of the pre-tightening force of the bolt 5. When the pre-tightening force of the bolt 5 is greater than or equal to the preset value, it indicates that the bolt 5 is tightened and the corresponding logic switch is closed; when the pre-tightening force of the bolt 5 is less than the preset value, it indicates that the bolt 5 is loosened and the corresponding logic switch is disconnected.

[0033] Preferably, the first end 321 is connected to the climbing frame 2 via four pins 4, and the second end 322 is connected to the standard section 1 via 4N bolts 5, where N is 2 or 3.

[0034] Preferably, the bolt 5 is a high-strength bolt 5 .

[0035] Preferably, the sensor is one of a bolt 5 preload sensor, a pressure sensor, a bolt 5 loosening sensor or a logic switch.

[0036] By adopting the above-mentioned design scheme, the utility model has the following beneficial effects: the tightness of the bolt 5 between the standard section 1 and the lower support 32 is detected by the sensor group, and the detected data is transmitted to the data processor. If one of the detected data is not within the preset data range, the intermediate relay coil KA loses power, the normally closed contact KA5 closes, and the jacking oil pump continues to work; if the detected data are all within the preset data range, the intermediate relay coil KA is energized, the normally closed contact KA5 is disconnected, and the jacking oil pump stops working. This effectively avoids failures during the jacking operation of the tower crane.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A tower crane jacking safety protection control system, characterized in that: It comprises a slewing assembly, a plurality of vertically stacked standard sections and a climbing frame erected outside the standard sections, the slewing assembly comprises a slewing support bearing and an upper support and a lower support pivotally connected to the upper and lower sides of the slewing support bearing, each of the lower supports comprises a first end close to the slewing support bearing and a second end away from the slewing support bearing, the upper end of the climbing frame is connected to the first end through a pin shaft, and the second end is connected to the standard section through a bolt; It also includes a sensor group for sensing the tightness between each standard section and the corresponding second end, an audible and visual warning device for alarm, a data processor for receiving signals from the sensor group and sending signals to the audible and visual warning device, and a display for display. A sensor is installed at the bolt where each second end is connected to the standard section, and each of the sensors constitutes the sensor group.

2. A tower crane jacking safety protection control system according to claim 1, characterized in that: It also includes 8 logic switches, a normally open contact KA1, a normally open contact KA2, a normally open contact KA3, a normally closed contact KA5, an intermediate relay coil KA, a tower crane slewing mechanism control circuit, a tower crane luffing mechanism control circuit, a tower crane hoisting mechanism control circuit and a hydraulic pump station power supply control circuit, wherein the first contact and the second contact of the normally open contact KA1 are respectively connected in series with the tower crane slewing mechanism control circuit, the first contact and the second contact of the normally open contact KA2 are respectively connected in series with the tower crane luffing mechanism control circuit, the first contact and the second contact of the normally open contact KA3 are respectively connected in series with the tower crane hoisting mechanism control circuit, and the first contact and the second contact of the normally closed contact KA5 are respectively connected in series with the hydraulic pump station power supply control circuit; The output end of the data processor is connected in series with the eight logic switches and forms a control loop with the intermediate relay coil KA.

3. A tower crane jacking safety protection control system according to claim 2, characterized in that: When all eight logic switches are closed, the intermediate relay coil KA is energized and attracted, and is respectively closed with the normally open contact KA1, the normally open contact KA2, and the normally open contact KA3, and is disconnected with the normally closed contact KA5; When the intermediate relay coil KA is de-energized and released, it is disconnected from the normally open contact KA1, the normally open contact KA2, and the normally open contact KA3, and closed with the normally closed contact KA5, and the circuits of the tower crane slewing mechanism control circuit, the tower crane luffing mechanism control circuit, and the tower crane lifting mechanism control circuit are all disconnected.

4. A tower crane jacking safety protection control system according to claim 2, characterized in that: It also includes a normally closed switch KA4 connected in series with the sound and light warning device. When the power is off and closed, the sound and light warning device emits sound and light.

5. A tower crane jacking safety protection control system according to claim 2, characterized in that: The data processor presets a standard value for the pre-tightening force of the bolt. When the pre-tightening force of the bolt is greater than or equal to the preset value, it indicates that the bolt is tightened and the corresponding logic switch is closed; when the pre-tightening force of the bolt is less than the standard value for the pre-tightening force of the bolt, it indicates that the bolt is loosened and the corresponding logic switch is disconnected.

6. A tower crane jacking safety protection control system according to claim 1, characterized in that: The first end is connected to the climbing frame via four pins, and the second end is connected to the standard section via 4N bolts, where N is 2 or 3.

7. A tower crane jacking safety protection control system according to claim 1, characterized in that: The bolts are high-strength bolts.

8. A tower crane jacking safety protection control system according to claim 1, characterized in that: The sensor is a bolt preload sensor, a pressure sensor or a bolt loosening sensor.

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