Novel anti-overturning jacking safety protection device for tower crane

Abstract

The utility model relates to a novel anti-overturning jacking safety protection device of a tower crane, which aims at filling the blank of the prior art and comprises a standard knot, an outer sleeve frame, a jacking mechanism and an introduction mechanism, the jacking mechanism comprises a jacking oil cylinder, a jacking cross beam and a climbing claw, the introduction mechanism comprises an introduction platform and an introduction guide rail arranged on the introduction platform, the jacking oil cylinder is provided with a hydraulic station, the outer sleeve frame is provided with a limiting sensor, the height of the upper-layer guide wheel is larger than that of the limiting sensor, and the height of the limiting sensor is smaller than that of the lower edge of the introduction guide rail. The limiting sensor is connected with the signal input end of the programmable controller, and when the limiting sensor cannot sense the standard knot on the topmost layer, the programmable controller emergently stops the action of the jacking oil cylinder through the emergency stop module. The device is safe and reliable, is suitable for various construction sites, and is particularly suitable for high-rise construction sites.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel tower crane anti-overturning jacking safety protection device. BACKGROUND

[0002] When installing the building tower crane, the jacking cross beam needs to be fixed in the circular arc groove of the standard section ladder, the hydraulic system is started, the piston rod is extended, the outer sleeve frame and the part above it are jacked up, the climbing claws are placed on the upper step of the standard section after jacking up slightly more than half the height of the standard section, the oil cylinder piston is fully retracted, the jacking cross beam is lifted, the jacking cross beam is repositioned on the upper step of the standard section, then the oil cylinder is extended, the upper structure of the tower crane is jacked up slightly more than half the height of the standard section, at this time, the introduction platform (also known as the outer extension frame) can be introduced into the upper part of the tower body, the oil cylinder is slightly retracted, the newly introduced standard section is placed on the top of the tower body, and the upper and lower standard sections are connected firmly by high-strength bolts. In this process, whether the climbing claws on the outer sleeve frame can be stably connected with the steps on the standard section is an important link for the safe and smooth installation of the tower crane.

[0003] The Chinese invention patent with publication number CN102390787B, which was granted on October 16, 2013, discloses a self-jacking tower crane jacking protection device and its control method. It includes climbing claw monitoring devices, jacking cross beam monitoring devices, and control alarm devices. Each climbing claw monitoring device is set on each climbing claw and the corresponding sleeve frame. The jacking cross beam monitoring devices are set on both ends of the jacking cross beam. The climbing claw monitoring devices and the jacking cross beam monitoring devices are connected with the control alarm devices, and the control alarm devices are connected with the jacking oil cylinder.

[0004] The climbing claw monitoring devices monitor whether the climbing claws are stuck in the steps during work, and the jacking cross beam monitoring devices monitor whether the jacking cross beam is in place. If the two monitoring devices find dangerous actions, the control alarm devices will be triggered to stop the dangerous actions and issue sound and light alarms.

[0005] The Chinese utility model patent with publication number CN210048412U, which was published on February 11, 2020, discloses a safety intelligent monitoring device for preventing tower crane overturning, which includes a jacking cross beam, a standard section, and a climbing device. The jacking cross beam is horizontally arranged and has anti-disengagement pin shafts at both ends. The standard section is fixed with steps, and the steps are provided with circular arc grooves matched with the anti-disengagement pin shafts. The climbing device is provided with a jacking oil cylinder, a safety pin, and a handle.

[0006] The lower end of the jacking oil cylinder is hinged to the middle of the jacking cross beam. The jacking cross beam is provided with a pin groove, and the safety pin is arranged in the pin groove. The steps are provided with safety pin holes matched with the safety pin. The safety pin is fixed with a handle, and the pin groove is provided with a stop block.

[0007] The technology described in the patent mainly monitors the anti-extraction shaft on the jacking cross beam, and reduces the probability of the anti-extraction shaft of the jacking cross beam being extracted from the circular arc groove.

[0008] The above two patent technologies start from different angles, increase the corresponding components, and improve the safety of the tower crane operation, but lack detection of the over-jacking of the outer sleeve frame to cause overturning, and need to be further improved. SUMMARY

[0009] The technical problem to be solved by the utility model is how to fill the above-mentioned gap in the prior art, and provide a novel tower crane anti-overturning jacking safety protection device which can effectively prevent the upper guide wheel of the outer sleeve frame from being separated from the topmost standard section, and is safe and convenient.

[0010] To solve the above technical problems, the novel tower crane anti-overturning jacking safety protection device comprises a standard section, an outer sleeve frame, a jacking mechanism and an introduction mechanism, the standard section comprises four vertical columns, eight horizontal rods and inclined rods arranged between adjacent vertical columns, two steps are welded on each of the two adjacent vertical columns of one side of the standard section from bottom to top at equal distances, and a semicircular clamping groove is formed in the step; the outer sleeve frame has a multi-layer frame structure, and upper guide wheels and lower guide wheels are arranged on the outer sleeve frame; the jacking mechanism comprises a jacking oil cylinder, a jacking cross beam and a climbing claw; the introduction mechanism comprises an introduction platform and an introduction guide rail arranged on the introduction platform; the jacking oil cylinder is provided with a hydraulic station, the hydraulic station comprises a hydraulic oil tank, a gear oil pump driven by a motor and a manual hydraulic control valve group, a programmable controller and an emergency stop module are arranged in the power supply circuit of the motor, a limit sensor is arranged on the outer sleeve frame, the height of the upper guide wheel is less than the height of the limit sensor and the height of the lower edge of the introduction guide rail, the limit sensor horizontally points to the vertical column of the adjacent standard section and is connected with the signal input end of the programmable controller, when the limit sensor cannot sense the topmost standard section, the programmable controller stops the action of the jacking oil cylinder through the emergency stop module, so as to prevent the upper guide wheel of the sleeve frame from being separated from the standard section due to excessive jacking, and to prevent the tower crane overturning accident caused by the instability of the upper structure of the tower crane.

[0011] In this way, when jacking, the limit sensor rises with the outer sleeve frame, when the limit sensor rises to be separated from the topmost standard section, the limit sensor senses no trigger signal, and the programmable controller stops the power supply of the motor through the emergency stop module. The outer sleeve frame cannot be excessively jacked, so the tower crane overturning accident caused by excessive jacking operation can be avoided.

[0012] As an optimization, a warning sensor is further arranged above the limit sensor, and the programmable controller is further provided with an alarm, when the warning sensor cannot sense the topmost standard section, the programmable controller sends a warning through the alarm.

[0013] Thus, the topmost standard section is first separated from the early warning sensor when the jacking approaches the end of the stroke each time, the limit sensor senses no triggering signal, the programmable controller sends out a warning through the alarm to remind the staff to manually stop the jacking operation, and there is no need to panic. If the jacking continues after the warning is sent out, the programmable controller will trigger the emergency stop module to automatically stop the jacking. This helps to orderly carry out the jacking operation.

[0014] As an optimization, the limit sensor and the early warning sensor are both magnetic induction proximity switches or reflective infrared sensors. Thus, the structure is simple, and the installation is convenient.

[0015] The anti-overturning jacking safety protection device of the tower crane can make the outer sleeve always remain within the safe and effective range during jacking or falling of the standard section through sensing the position of the standard section by the limit sensor. Once the safe range of the outer sleeve and the standard section is exceeded, the action of the jacking cylinder can be stopped in time, and accidents caused by operation errors or illegal operation can be prevented in time. The upper guide wheel of the outer sleeve can be effectively prevented from being separated from the topmost standard section. The structure is scientific, the installation is convenient, the safety is reliable, and the device is suitable for various construction sites, especially high-rise construction sites. BRIEF DESCRIPTION OF DRAWINGS

[0016] The anti-overturning jacking safety protection device of the tower crane will be further described below in combination with the drawings:

[0017] Figure 1 is a hydraulic system principle diagram of the anti-overturning jacking safety protection device of the tower crane according to the first embodiment of the present application;

[0018] Figure 2 is a limit sensor installation schematic diagram of the anti-overturning jacking safety protection device of the tower crane according to the first embodiment of the present application;

[0019] Figure 3 is a use state three-dimensional structure schematic diagram of the anti-overturning jacking safety protection device of the tower crane according to the second embodiment of the present application (omitting the connecting bolts between the standard sections and the signal lines of the limit sensors and the early warning sensors);

[0020] Figure 4 is a position relationship schematic diagram of the climbing claws and the steel wire rope of the anti-overturning jacking safety protection device of the tower crane according to the second embodiment of the present application;

[0021] Figure 5 is a schematic diagram of lifting the outer side arm of the climbing claw by the steel wire rope to make the outer sleeve freely descend when the standard section is removed.

[0022] In the diagram: 1 is the standard section, 2 is the outer frame, 3 is the column, 4 is the step, 41 is the semi-circular slot, 5 is the upper guide wheel, 6 is the lower guide wheel, 7 is the lifting cylinder, 8 is the lifting beam, 9 is the climbing claw, 91 is the inner arm, 92 is the outer arm, 10 is the introduction platform, 11 is the introduction guide rail, 12 is the hydraulic oil tank, 13 is the electric motor, 14 is the gear oil pump, 15 is the manual hydraulic control valve group, 16 is the two-way hydraulic lock, 17 is the programmable controller, 18 is the emergency stop module, 19 is the limit sensor, 20 is the early warning sensor, 21 is the alarm, 22 is the crossbar, 23 is the diagonal bar, 24 is the protruding plate, 25 is the horizontal hinge shaft, 26 is the wire rope, 27 is the linkage rod, 28 is the pull ring, 29 is the one-way throttle valve, 30 is the pressure gauge, 31 is the overflow valve, and 32 is the oil filter. Detailed Implementation

[0023] Implementation method one: such as Figures 1-2 As shown, the novel anti-tipping lifting safety protection device for tower cranes includes a standard section 1, an outer frame 2, a lifting mechanism, and a guide mechanism. The standard section 1 includes four columns 3, eight crossbars, and diagonal braces between adjacent columns 3. On one side of the standard section 1, two steps 4 are welded at equal intervals from bottom to top on each pair of adjacent columns 3, and semi-circular slots 41 are opened on the steps 4. The outer frame 2 is a multi-layer frame structure, with upper guide wheels 5 and lower guide wheels 6 respectively. The lifting mechanism includes a lifting cylinder 7, a lifting crossbeam 8, and climbing claws 9. The guide mechanism includes a guide platform 10 and a guide rail 11 set on the guide platform 10. The lifting cylinder 7... Equipped with a hydraulic station, which includes a hydraulic oil tank 12, a gear oil pump 14 driven by an electric motor 13, a manual hydraulic control valve group 15, and a two-way hydraulic lock 16. The power supply circuit of the electric motor 13 includes a programmable controller 17 and an emergency stop module 18. A limit sensor 19 is provided on the outer frame 2. The height of the upper guide wheel 5 is less than the height of the limit sensor 19 and less than the height of the lower edge of the guide rail 11. The limit sensor 19 points horizontally to the column 3 of the adjacent standard section 1 and is connected to the signal input terminal of the programmable controller 17. When the limit sensor 19 fails to sense the top standard section 1, the programmable controller 17 stops the action of the lifting cylinder 7 in an emergency through the emergency stop module 18.

[0024] Above the limit sensor 19, a warning sensor 20 is also provided. The programmable controller 17 is also equipped with an alarm 21. When the warning sensor 20 fails to detect the topmost standard section 1, the programmable controller 17 issues a warning through the alarm 21. Both the limit sensor 19 and the warning sensor 20 are magnetic induction proximity switches or reflective infrared sensors.

[0025] like Figures 3-5As shown, the new tower crane anti-overturning jacking safety protection device includes four long columns, multiple layers of horizontal rods 22 and multiple layers of inclined rods 23. The three layers of horizontal rods 22 form an upper horizontal frame, a middle horizontal frame and a lower horizontal frame. The lower horizontal frame of the outer sleeve frame 2 adjacent to the steps 4 is provided with a protruding plate 24. The middle sections of the two climbing claws 9 are hingedly connected to the protruding plate 24 through horizontal hinge shafts 25. The horizontal hinge shafts 25 divide the climbing claws 9 into inner arms 91 and outer arms 92. The gravity moment of the outer arms 92 is greater than that of the inner arms 91. The outer ends of the outer arms 92 are connected to a steel wire rope 26. The other end of the steel wire rope 26 is connected to a linkage pull rod 27. The linkage pull rod 27 is arranged in a sleeve of the middle horizontal frame of the outer sleeve frame 2 above it. The top end of the linkage pull rod 27 is provided with a pull ring 28. The remaining structure is as shown in embodiment one.

[0026] When the tower crane needs to remove part of the standard sections 1, the connecting bolts between the top turntable of the tower crane and the topmost standard section 1 are removed first. Then the anti-disengagement pin shaft of the jacking beam is clamped into the lower steps 4 of the second topmost standard section 1. The outer sleeve frame 2 is appropriately jacked up using the jacking oil cylinder 7. Then the connecting bolts between the topmost standard section 1 and the second topmost standard section 1 are removed. The topmost standard section 1 is pushed to the introduction platform 10. The pull ring 29 is pulled up. The linkage pull rod 27 and the steel wire rope 26 lift the outer end of the climbing claw 9. The jacking oil cylinder 7 is retracted. The outer sleeve frame 2 falls. The climbing claw 9 is clamped on the steps 4 of the next standard section 1. Then the above operation is repeated. The top turntable of the tower crane is lowered to the remaining topmost standard section 1. The standard section 1 on the introduction platform 10 is lifted by the crane hook and moved to the ground. The removal of one standard section 1 is completed. In this way, all the standard sections 1 that need to be removed are removed.

Claims

1. A novel anti-tipping lifting safety protection device for tower cranes, comprising a standard section, an outer frame, a lifting mechanism, and a guide mechanism. The standard section includes four columns, eight crossbars, and diagonal braces between adjacent columns. On one side of the standard section, two steps are welded at equal intervals from bottom to top on adjacent columns, and semi-circular slots are provided on the steps. The outer frame is a multi-layered frame structure, with upper and lower guide wheels respectively provided on the outer frame. The lifting mechanism includes a lifting cylinder, a lifting beam, and climbing claws. The guide mechanism includes a guide platform and guide rails mounted on the guide platform. The lifting cylinder is equipped with a hydraulic station, which includes a hydraulic oil tank, a motor-driven gear pump, and a manual hydraulic control valve group. The power supply circuit of the motor includes a programmable controller and an emergency stop module. The device is characterized by: The outer frame is equipped with a limit sensor. The height of the upper guide wheel is less than the height of the limit sensor and less than the height of the lower edge of the guide rail. The limit sensor points horizontally to the column of the adjacent standard section and is connected to the signal input terminal of the programmable controller. When the limit sensor fails to detect the top standard section, the programmable controller stops the lifting cylinder's operation urgently through the emergency stop module.

2. The novel tower crane anti-tipping and jacking safety protection device as described in claim 1, characterized in that: Above the limit sensor is a warning sensor, and the programmable controller is also equipped with an alarm. When the warning sensor fails to detect the top standard section, the programmable controller issues a warning through the alarm.

3. The novel tower crane anti-tipping and jacking safety protection device as described in claim 2, characterized in that: Both the limit sensor and the early warning sensor are magnetic proximity switches or reflective infrared sensors.

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