CN105883646B - Tower crane and derrick crane used by same - Google Patents

Abstract

The present invention provides a lifting rod crane, which includes a lifting rod foundation connected to a fixed surface, a slewing base arranged on the lifting rod foundation and a main lifting rod hinged to the slewing base, and a control system for controlling the main lifting rod to achieve position switching; the control system includes a variable amplitude system for controlling the inclination amplitude of the main lifting rod and a slewing traction system for controlling the horizontal deflection direction of the main lifting rod. The lifting rod crane of the present invention can be installed on a tower crane frame, and can complete the removal of the attachment device in a safe, efficient and convenient way when it is necessary to remove the attachment device at high altitude.

Description

Tower crane and the pole crane used therein

technical field

The invention relates to the field of building construction, in particular, the invention relates to a tower crane and a pole crane used therein.

Background technique

In road construction and bridge construction, especially in the construction of cable-stayed bridges, suspension bridges and high piers, tower cranes are often used for hoisting construction. After the construction is completed, there are often difficulties in removing the attachment of the tower crane due to the lack of lifting equipment to help remove the attachment device of the tower crane in the later stage.

Especially during the construction of the cable towers of cable-stayed bridges, the boom cannot be rotated at a large angle due to the influence of the cables, and it is difficult to complete the self-removal of the attachment device. Therefore, external lifting equipment (such as a hoist, etc.) is usually required for removal. The hoist needs to be fixed on the top of the cable tower and the bridge deck, with many anchor points, low efficacy, poor safety, and it is difficult to disassemble the hoist later. And in the process of removing the attachment with the help of external lifting equipment, the road needs to be closed to avoid accidents and affect the traffic of vehicles.

Therefore, the removal work of the current tower crane attachment device is difficult, the cost is high, the efficacy is low, the operation is cumbersome and the safety is poor.

Contents of the invention

The main purpose of the present invention is to overcome the deficiencies of the prior art, to provide a pole crane that can conveniently, safely and efficiently complete the removal of attachment devices, and a tower crane using the pole crane.

In order to achieve the above object, the present invention provides a pole crane:

It includes a grill base connected to a fixed surface, a rotary base set on the grill base, a main grill hinged to the rotary base, and a control system for controlling the main grill to switch positions; the The control system includes a luffing system for controlling the inclination range of the main pole and a rotary traction system for controlling the horizontal deflection direction of the main pole.

Further, the pole foundation includes a foundation beam and a strut set for reinforcing the foundation beam.

Further, the brace group includes horizontal diagonal braces and vertical diagonal braces.

Further, the slewing base includes a slewing support and a connection seat provided at the upper end of the slewing support; the upper end of the connection seat is provided with a pivot hole connected with the main grill bar.

Further, one end of the main pole is hinged to the upper end of the connecting seat, and the other end is used as a free end for lifting.

Further, the control system also includes a hoisting system for lifting by using the main pole.

Further, the lifting system includes a hoisting hoist arranged on the foundation of the pole, a fixed block set on the axis of the foundation of the pole, a lifting pulley set on the free end of the main pole, and a The moving block below the lifting pulley and the hoisting steel rope extending from the lifting hoist and passing through the fixed block, the lifting pulley and the moving block in sequence and finally fixed to the free end of the main pick-up bar.

Further, the hoisting hoist and the slewing base are respectively arranged at both ends of the pole foundation.

Further, the hoisting system also includes guide wheels connected to the slewing base through steel ropes, and the hoisting steel ropes extend from the hoisting hoist and pass through the fixed block, the guide wheels and , hoisting pulley and moving block and finally fixed on the free end of the main pickling bar.

Further, the luffing system includes an luffing drive mechanism and a fixed tackle arranged on the axis where the grill base is located, and one end is fixedly connected to the luffing drive mechanism and the other end passes through the fixed tackle. A luffing steel rope anchored to the free end of the main pick-up pole.

Further, the slewing traction system includes a left slewing drive mechanism and a right slewing drive mechanism arranged on a slewing control plane parallel to the base of the pick-up bar, and a drive mechanism connecting the left turn drive mechanism with the free end of the main pick-up bar. The left traction steel rope is connected to the right traction steel rope of the right rotary drive mechanism and the free end of the main pickling rod.

Further, the rotation control plane is equal to or higher than the free end of the main grill bar.

The present invention also provides a tower crane, which at least includes a tower body, a tower crane sleeve frame sleeved on the tower body, a lifting arm extending perpendicular to the tower body above the tower crane sleeve frame, and an opposite On the balance arm extended in the opposite direction of the boom, the tower crane set is provided with the above-mentioned pick-up crane.

Further, the pole foundation of the pole crane is fixed to the surface of the tower crane casing.

Further, the pole foundation and the tower crane frame are temporarily fixed in the form of bolting.

Further, the driving mechanism and fixed block of the luffing system are arranged on the tower body and/or the tower crane frame.

Further, the plane where the boom and the balance arm are located serves as the slewing control plane of the slewing traction system.

Compared with the prior art, the solution of the present invention has the following advantages:

The pole crane of the present invention can be installed on the tower crane frame, and can complete the removal of the attachment device in a safe, efficient and convenient way when it is necessary to remove the attachment device at high altitude:

(1) The pole crane of the present invention is bolted to the tower crane casing, and can be lifted and lowered with the tower crane casing without destroying or affecting the steel structure of the tower crane itself.

(2) The pole crane of the present invention can be lifted and lowered with the tower crane frame, and its installation and later dismantling work can be carried out on the ground using equipment such as truck cranes, and the installation and dismantling methods are simple and convenient.

(3) The pole crane of the present invention can be arbitrarily luffed and rotated, and the attachment device can be removed at high altitude without other lifting equipment, and the operation is simple, safe and efficient.

(4) Using the pole crane of the present invention, after the construction bridge is opened to traffic, the attachment can be removed without road closure, without affecting safe passage.

The tower crane of the present invention is provided with a pick-up crane, which can safely, efficiently and conveniently complete the removal operation of the high-altitude attachment device.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the local schematic diagram of tower crane of the present invention;

Fig. 2 is the front view of the pole crane of the present invention;

Fig. 3 is the top view of the pole crane of the present invention installed on the tower crane frame;

Fig. 4 is a front view of the second embodiment of the pole crane of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

As shown in FIG. 1 , the tower crane 10 of the present invention includes a tower body 101, a tower crane casing 102 sleeved on the tower body 101, and extends perpendicular to the tower body 101 above the tower crane casing. The jib 103 and the counter jib 104 extending opposite to the jib 103 .

The raising of the tower crane 10 is realized through the hydraulic device connected with the tower crane frame 102 , using the hydraulic principle to make the tower crane frame 102 complete the climbing action, and then adding standard joints to the tower body 101 .

The pole crane 100 of the present invention is arranged on the tower crane 10 , specifically, the pole crane 100 is fixed on the surface of the tower crane frame 102 , so it can rise or fall along with the tower crane frame 102 . In the construction process of construction projects such as road construction and bridge construction, especially during the construction of cable-stayed bridges, suspension bridges and high piers, the pole crane 100 can be installed on the tower crane frame to complete the lifting on the tower crane. After the process, the attachment device of the tower crane is removed.

Further, the pole crane 100 and the tower crane frame 102 are temporarily fixed by bolting. In other embodiments, the pole crane 100 and the tower crane frame 102 can also be temporarily fixed by other commonly used steel structure mechanical connection methods that do not damage the structure of the tower crane 10 itself. The pole crane 100 can be raised or lowered with the tower crane frame 102, and can be lowered to the ground with the tower crane frame after the project is completed, and can be dismantled by a truck crane, which is easy to disassemble.

As shown in FIG. 2 , the pole crane 100 of the present invention includes a pole base 1 , a revolving base 2 arranged on the base 1 , a main pole 3 hinged to the base 2 , and a control system for controlling the main pole. Gripping bar 3 realizes the control system 4 of position switching. The control system 4 includes a luffing system 41 for controlling the inclination of the main grill bar 3 and a rotary traction system 42 for controlling the horizontal deflection direction of the main grill bar. For the convenience of description, it is defined that one end of the grill base 1 provided with the revolving base 2 is the front end, and the other end is the end.

Referring to Fig. 1 and Fig. 2, the grill base 1 is connected to a fixed surface. Specifically, the fixed surface refers to the surface of the tower crane frame 102 . In this embodiment, the pole foundation 1 is fixed on the bottom surface of the tower crane frame 102 . In other embodiments, the fixed position of the picket foundation 1 on the tower crane frame 102 can be adjusted appropriately.

Referring to FIGS. 1-3 , the pole foundation 1 includes a foundation beam 11 and a brace group 12 for reinforcing the foundation beam 11 .

The foundation beam 11 is a load-bearing beam made of steel H250, which is temporarily anchored to the surface of the tower crane casing 102 through a screw 13 and/or clamping plate 14 . In this embodiment, the screw 13 is an M20 screw. The installation and removal operations of the screw rod 13 and the clamping plate 14 are very simple, and this temporary anchoring method does not need to destroy the steel structure of the tower crane 10 itself. In other embodiments, the type and size of the screw 13 and/or clamping plate 14 can be adjusted adaptively; other commonly used steel structure mechanical connection methods that do not destroy the structure of the tower crane 10 can also be used for temporary fixation. In other embodiments, the foundation beam 11 can be made of other types or types of steel according to different engineering requirements. Referring to FIG. 2 and FIG. 3 , one end of the strut group 12 is welded to the foundation beam 11 , and the other end is used to connect the tower crane frame 102 . In this embodiment, the strut group 12 includes a pair of horizontal struts 121 and a pair of vertical diagonal struts 122, specifically, the horizontal struts 121 are used to fix the crossbeam rods of the tower crane frame 102 (see FIG. 3 ), the vertical diagonal brace 122 is used to fix the vertical chord of the tower crane frame 102 (see FIG. 2 ). The brace group 12 increases the overall stability of the pole crane 100 on the tower crane frame. In other embodiments, the brace group can increase or decrease the number of horizontal braces and vertical braces and adjust their fixed positions to meet different engineering needs.

Further, the strut set 12 may also be temporarily anchored to the tower crane casing 102 through the screw rod 13 and/or the clamping plate 14 . In other embodiments, the foundation beam 11 and the tower crane frame 102 can be anchored and fixed by other commonly used steel structure mechanical connection methods that do not damage the structure of the tower crane 10 itself.

Continuing to refer to FIG. 2 , the rotary base 2 is arranged at the front end of the grill foundation 1 , and the main grill bar 3 is arranged on the upper end of the rotary base 2 . Specifically, the slewing base 2 includes a slewing support 21 and a connecting seat 22 provided at the upper end of the slewing support 21 . The upper end of the connecting seat 22 is provided with a pivot hole connected with the main grill bar 3 . The lower end of the slewing support 21 is bolted to the grill base 1 through a flange, and the upper end is bolted to the connecting seat 22 through another flange, and the connecting seat is hinged to the lower end of the main grilling rod 3 . On the one hand, the setting of the slewing support 21 can realize the left and right rotation of the main grill bar 3 in the horizontal direction; Rotate up and down. The main grill bar 3 is made of H250 steel, and in this embodiment, the main grill bar 3 is 8m long. In other embodiments, the main grill bar 3 can be made of other types or types of steel according to different engineering needs, and the size of the main grill bar 3 can also be adaptively adjusted to meet different engineering needs. Further, one end of the main grill bar 3 is connected to the upper end of the connecting seat 22 through a hinge, and the other end is used as a free end for lifting.

Continuing to refer to FIG. 2 and FIG. 3 , the luffing system 41 includes a luffing drive mechanism 411 for driving the luffing of the main pickle bar and a fixed drive mechanism 411 for realizing guiding and traction, which are arranged on the axis where the picket base 1 is located. A pulley 412, and one end is fixedly connected to the luffing drive mechanism 411 and the other end passes through the fixed pulley 412 and anchored to the free end of the main grill bar 3. The luffing steel rope 413.

Specifically, the luffing drive mechanism 411 is a 5t chain block, which is installed on the axis where the pole foundation 1 is located, more specifically, on the standard section crossbar of the tower crane 10 . In other implementation manners, the variable-amplitude driving mechanism 411 can be other mechanisms such as a winch, and its installation position can be adjusted appropriately.

The fixed block 412 is a single-wheel fixed block installed on the standard section of the tower crane 10 . In other embodiments, the position of the fixed tackle 412 can also be flexibly adjusted according to the load, such as being hung on a tower cap. The single-wheel fixed block can change the direction in which the tension of the luffing steel rope 413 is applied, and guide the tension.

One end of the luffing steel rope 413 is connected to the luffing driving mechanism 411 , and the other end is connected to the main pole 3 . When the luffing drive mechanism 411 tightens or releases the luffing steel rope 413, the main pickling bar 3 swings vertically up and down, and the inclination of the main pickling bar 3 changes accordingly; the main pickling bar 3 The radius of the projection range directly below increases with the lowering of the main grill bar 3; on the contrary, the radius of the projection range decreases with the lifting of the main grill bar 3, and the projection range is the main grill bar 3. The current radial working range of the grill bar 3; the above is to realize the amplitude-changing action of the main grill bar 3 by controlling the inclination range of the main grill bar 3.

The slewing traction system 42 includes a slewing drive mechanism 421 arranged on a slewing control plane parallel to the grill base. Specifically, the slewing drive mechanism 421 includes a left slewing drive mechanism 4211 and a right slewing drive mechanism 4212, the left slewing drive mechanism 4211 is set at the root of the boom 103 of the tower crane 10, and the right slewing drive mechanism 4212 is set On the balance arm 104 platform of the tower crane 10. The slewing control plane parallel to the pole foundation refers to the plane where the boom 103 and the balance arm 104 of the tower crane 10 are located. During the construction operation, the boom 103 and the balance arm 104 of the tower crane 10 are maintained in a substantially horizontal state, so the plane where the boom 103 and the balance arm 104 are located belongs to the plane parallel to the pole foundation described in the present invention. of the rotary control plane. Preferably, the rotation control plane is flush with or higher than the free end of the main grill bar 3 .

In addition, the rotary traction system 42 also includes a left traction steel rope 4221 connecting the left rotary driving mechanism 4211 with the free end of the main grill bar 3, and connecting the right rotary drive mechanism 4212 with the free end of the main grill bar 3. Right traction steel rope 4222.

Specifically, the slewing drive mechanism 421 includes two 3t chain hoists, which are respectively installed at the root of the boom 103 of the tower crane 10 and the fixed part of the platform of the balance arm 104 . In other embodiments, the slewing drive mechanism 421 can be other mechanisms such as a winch, and its installation position can be adjusted appropriately on the premise that the left slewing drive mechanism 4211 and the right slewing drive mechanism 4212 are kept at the same level.

The left traction steel rope 4221 and the right traction steel rope 4222 are drawn from the hooks of the two 3t chain hoists respectively, and are connected to the free end of the main pole 3 . The two 3t chain hoists work in coordination with the two traction ropes to realize the left and right rotation of the main pick lever 3 . Specifically, when performing slewing operations, one traction rope takes in the rope, and the other traction rope releases the rope synchronously.

Further, the control system 4 also includes a lifting system 43 for using the main pick bar 3 to achieve lifting. The lifting system 43 includes a lifting winch 431 arranged at the end of the pole foundation 1, a fixed tackle 432 arranged on the axis of the pole foundation 1 for realizing the guiding function, and a fixed pulley 432 arranged at the free end of the main pole 3. Lifting pulley 433, the moving block 434 that hangs below described lifting pulley 433 and extend from described lifting hoist 431 and pass through described fixed block 432, lifting pulley 433 and moving block 434 successively and finally Be fixed on the hoisting steel rope 435 of main pickling bar 3 free ends.

Specifically, the lifting hoist 431 is used as the driving mechanism of the hoisting system 43. In this embodiment, an electronically controlled hoisting drum with a lifting capacity of 10KN and a torque of 8000N·m is used, and the diameter of the drum is 90cm.

The fixed block 432 is a single-wheel fixed block installed on the standard section of the tower crane. In other embodiments, the position of the fixed tackle 432 can also be flexibly adjusted according to the load, such as being hung on a tower cap. The single-wheel fixed block can change the pulling force direction of the lifting steel rope 435 and play a guiding role.

The lifting pulley 433 is arranged on the free end of the main grill bar 3, and is a fixed pulley, which plays a guiding role.

The moving block 434 is directly below the lifting pulley 433 and is connected with the lifting pulley 433 through a lifting steel rope 435 . The moving block 434 is used as a lifting hook, and when the lifting hoist 431 tightens or releases the lifting steel rope 435, it will rise or fall accordingly, thereby realizing the lifting action of the object.

Further, the lifting system 43 also includes a sling and a shackle (not shown). When hoisting, use the sling and the shackle to bind the object to be lifted, so that the object can be lifted or lowered smoothly. Further, the sling and the lifting steel rope 435 are connected by the shackle. Application When removing the attached strut, it is necessary to use the sling and the shackle to bind the two ends of the strut.

In this embodiment, in order to avoid excessive extrusion force on the four-corner balance rollers of the tower crane frame 102, a steel wedge is provided between the main chord of the frame and the main chord of the standard section to reduce the stress on the four-corner balance rollers. Improve the force and stabilize the tower crane frame. The steel wedge is a plug-in steel wedge, and in other embodiments, a wooden wedge can also be used.

Please refer to FIG. 4 , in another embodiment, the hoisting system 43 further includes a guide wheel 436 connected to the slewing base 2 through a steel rope, and the hoisting steel rope 435 extends from the hoisting hoist 431 out and pass through the fixed block 432, the guide wheel 436, the lifting pulley 433 and the moving block 434 in sequence and are finally fixed on the free end of the main grill bar 3. The guide wheel 436 is connected to the revolving base 2 through a steel cable, and can move flexibly with the rotation of the revolving base 2 . The setting of the guide wheel 436 can prevent the hoisting steel rope 435 from detaching from the hoisting pulley 433 at the free end of the main pick bar 3 , which enhances the stability of the hoisting system 43 .

When the pole crane 100 is working, its control method mainly includes the amplitude control process of controlling the inclination range of the main pole 3, the left and right rotation control process of controlling the horizontal deflection direction of the main pole 3, and using the Main pole 3 realizes the hoisting control procedure of hoisting hoisting.

The hoisting operation of the pole crane 100 is a dangerous operation at a high place, and the operating conditions are changeable. It is necessary to debug and experiment the pole crane 100 before the formal operation. In this embodiment, the test lifting load is 20KN , it can be formally put into use only after passing the trial lifting. In other embodiments, the test load is adaptively adjusted according to the engineering profile, the actual lifting weight, and the selection of the main pick-up bar material of the pick-up bar crane.

The variable-amplitude control procedure of the inclination range of the control main grill bar 3 specifically includes the following contents:

(1) The luffing system 41 as the first traction assembly is set on the axis where the grill base 1 is located to control the tilting range of the main grill 3:

As mentioned above, the luffing system 41 includes the luffing drive mechanism 411 and the fixed pulley 412, the connection of the luffing drive mechanism 411, the fixed pulley 412 and the main pole 3 is through The luffing steel rope 413 anchored to the free end of the main pick bar 3 after passing through the fixed tackle 412 is realized.

Specifically, the luffing mechanism 411 is a winch or a chain block.

In this embodiment, the first traction assembly (that is, the luffing system 41 ) is arranged on the standard section beam of the tower crane 10 . In other implementation manners, the installation position of the luffing mechanism 411 can be properly adjusted according to engineering requirements.

(2) Carry out luffing operation:

activating the luffing drive mechanism to tighten or release the luffing steel rope;

The main pick bar swings vertically following the retraction and release of the luffing steel rope;

When the main grill lever swings to a suitable position, stop the operation of the luffing drive mechanism.

Further, the luffing operation can be divided into upward luffing and downward luffing.

Specifically, the control procedure of the upward amplitude change is:

Start the luffing drive mechanism 411, and the luffing drive mechanism 411 drives the luffing steel rope 413 to tighten. Since the connection mode between one end of the main pick-up lever 3 and the rotary base 2 is hinged, the main pick-up lever 3 can be realized as follows: The hinge is the center to swing vertically up and down, thereby changing the inclination range of the main grill bar 3 .

Therefore, when the luffing steel rope 412 connected to the free end of the main grill bar 3 is tightened, the free end of the main grill bar 3 is subjected to an upward pulling force, so that the main grill bar 3 swings upwards, and the main grill bar 3 swings upwards. The radius of the projected range directly below the 3 decreases thereupon, that is, the radial working range of the main grill bar 3 dwindles.

When the main grill bar 3 swings to a suitable position, that is, when the radial working range of the main grill bar 3 is reduced to a suitable range, the luffing drive mechanism 411 stops running.

Specifically, the control procedure of the downward amplitude change is:

Start the luffing drive mechanism 411, and the luffing drive mechanism 411 drives the luffing steel rope 413 to release. Since one end of the main pickling bar 3 is connected to the rotary base 2 in a hinged manner, the main pickling bar 3 can be vertically Swing up and down, thereby changing the inclination range of the main grill bar 3.

Therefore, when the luffing steel rope 412 connected to the free end of the main grill bar 3 is released, the pulling force received by the free end of the main grill bar 3 decreases, so that the main grill bar 3 swings downward due to its own gravity, so The radius of the projection range directly below the main grill bar 3 increases accordingly, that is, the radial working range of the main grill bar 3 increases.

When the main grill bar 3 swings to an appropriate position, that is, when the radial working range of the main grill bar 3 increases to an appropriate range, the luffing drive mechanism 411 stops running.

The left and right rotation control method for controlling the horizontal deflection direction of the main grill bar 3 relies on the rotation traction system 42, and specifically includes the following contents:

(1) A rotary traction system 42 as a second traction assembly is set on the rotary control plane parallel to the grill base 1 to control the horizontal deflection direction of the main grill bar 3:

The rotation control plane is perpendicular to the axis of the grill base 1 and is higher than the main grill 3 .

As mentioned above, the slewing traction system 42 includes a left slewing drive mechanism 4211 and a right slewing drive mechanism 4212, and a left traction steel rope 4221 connecting the left slewing drive mechanism 4211 with the free end of the main pick bar 3, connecting the The right slewing drive mechanism 4212 and the right traction steel rope 4222 at the free end of the main grill bar 3 .

Specifically, the left rotary drive mechanism 4211 and the right rotary drive mechanism 4212 are winches or chain blocks.

In this embodiment, the left slewing drive mechanism 4211 is set on the balance arm 104 platform of the tower crane 10 , and the right slewing drive mechanism 4212 is set at the root of the boom 103 of the tower crane 10 . The slewing control plane parallel to the pole foundation 1 refers to the plane where the boom 103 and the balance arm 104 of the tower crane 10 are located. In other implementations, the installation positions of the left rotary drive mechanism 4211 and the right rotary drive mechanism 4212 can be adjusted appropriately on the premise that they are kept at the same level.

(2) Perform left and right rotation operations:

The left and right turning operations can be divided into left turning (in this embodiment, the definition of turning towards the end of the boom 103 is left) and right turning (in this embodiment, defining the direction of turning closer to the balance arm 104). direction of rotation is right).

Specifically, the control procedure for turning to the left is as follows:

Simultaneously activate the left slewing drive mechanism 4211 and the right slewing drive mechanism 4212, the left slewing drive mechanism 4211 located at the root of the boom 103 of the tower crane 10 tightens the left traction rope 4221 connected to it, and is located at the balance arm 104 platform of the tower crane 10 The upper right rotary drive mechanism 4212 releases the right traction steel rope 4222 connected with it synchronously.

Two traction ropes work together to make the main pickling bar 3 rotate leftwards in the horizontal direction.

When the main grill bar 3 is rotated to a suitable position, the left rotary drive mechanism 4211 and the right rotary drive mechanism 4212 are stopped.

Further, the control process of turning right is as follows:

Simultaneously start the left slewing drive mechanism 4211 and the right slewing drive mechanism 4212, the left slewing drive mechanism 4212 on the balance arm 104 platform of the tower crane 10 releases the left traction steel rope 4222 connected to it, and the lifting arm 103 on the tower crane 10 The right turning drive mechanism 4211 at the root synchronously tightens the right traction steel rope 4221 connected thereto.

The two traction ropes work together to make the main pickling bar 3 rotate to the right in the horizontal direction.

When the main grill bar 3 is rotated to a suitable position, the left rotary drive mechanism 4211 and the right rotary drive mechanism 4212 are stopped.

The lifting control procedure is carried out by means of the lifting system 43, which specifically includes the following steps:

(1) the hoisting system as the third traction assembly is set on the axis of the pole foundation 1 and/or on the pole foundation 1 to control the lifting hook connected with the free end of the main pole 3 ( That is, the position of the moving tackle 434);

(2) Lower the hoisting hook (moving block 434) to the place where the heavy object is to be lifted:

Start the hoist hoist 431 to release the hoisting steel rope 435, and the hoisting steel rope 435 passes through the fixed block 432 and the hoisting pulley 433 arranged at the free end of the main pole 3 and the moving block 434 below the hoisting pulley 433, thereby controlling all Describe moving tackle 434 and descend to the position of the object to be lifted.

(3) Connect the lifting hook with the object to be lifted:

The hoisting cage is hoisted by other hoisting equipment, and the staff stands in the hoisting cage to complete the connection and binding work of the object to be lifted and the lifting hook (moving block 434).

(4) lifting the lifting hook to lift the heavy object to be lifted:

Start the lifting hoist 431 to tighten the lifting steel rope 435, and the lifting steel rope 435 passes through the fixed tackle 432 and the lifting pulley 433 that is arranged on the free end of the main pole 3 and the moving tackle 434 below the lifting pulley 433, and then controls The moving block 434 rises, thereby realizing the hoisting of the object to be lifted.

When controlling the movement of each position of the pole crane 100, it should be noted that in order to ensure the safety of the pole, each action should be completed separately, such as lifting and luffing operations should not be performed when turning left and right ; Rotation and lifting operations should not be carried out during luffing.

The pole crane 100 of the present invention is mainly used to remove the attachment device of the tower crane 10, that is, the attachment device used for hoisting the tower crane 10, and the use of the pole crane cage of the present invention to carry people is strictly prohibited.

The attachment device of the tower crane 10 generally includes three (or four) horizontally arranged struts and a set of attachment frames sleeved on the main chord of the standard section. The number of sets of the attachment device is determined by the lifting height.

Utilize the method for removing the attached strut by the pole crane of the present invention as follows:

(1) Pre-install the pole crane 100 on the tower crane 10 or adopt the tower crane 10 provided with the pole crane 100:

The pole crane 100 is installed on the tower crane cover frame 102 and can be raised or lowered with the tower crane cover frame 102 . In the process of raising the tower crane 10, in order to maintain the stability of the tower crane 10, an attachment device is usually added at a certain height. After the attachment device is installed, the tower crane cover frame 102 cannot be lowered due to the obstruction of the attachment device. Therefore, the pole crane 100 should be installed on the tower crane cover frame 102 before the attachment device is installed. Preferably, before jacking up and adding joints to the tower crane 10 , the boom crane 100 should be installed on the tower crane frame 102 first, and then the tower crane frame 102 is used to jack up and add joints.

(2) Control the main grill bar 3 to move directly above the component to be removed:

When the attachment device is to be removed, it is necessary to first control the main grill bar 3 to move directly above the attachment device to be removed. Specifically, including:

Control the main grill bar 3 to rotate to the top of the component to be removed;

Control the main pole 3 to carry out luffing operation, and adjust the hoisting amplitude radius.

Wherein, through the aforesaid left and right rotation control process of the pole crane, the main pole 3 is slowly rotated to the top of the component to be disassembled;

Through the aforesaid amplitude control process of the pole crane, the amplitude control of the main pole 3 is carried out, and the hoisting amplitude radius of the main pole is appropriately increased or reduced to a suitable range.

(3) disassemble after temporarily fixing the member to be dismantled and the lifting hook (hanging on the moving tackle 434):

Specifically include the following steps:

① Lower the lifting hook (moving block 434) to the component to be removed:

The lifting hoist 431 releases the lifting steel rope 435, and the lifting steel rope 435 passes through the fixed block 432, the lifting pulley 433 arranged at the free end of the main pole 3 and the moving block 434 below the lifting pulley 433, and then controls the lifting pulley 434. Moving tackle 434 descends to the position of the component to be removed. Hang two slings of equal length so that they are firmly tied to the two ends of the component to be removed. The function of the two slings is to stabilize the attachment device and prevent it from freely shaking or colliding after it is removed.

2. Temporarily fix the member to be removed with the lifting hook (moving tackle 434):

The cage is hoisted by other lifting equipment, and the staff stand in the cage to complete the connection and binding of the components to be dismantled and the lifting hook.

③ Disassemble the attachment device:

The cage is hoisted by other lifting equipment, and the staff stands in the cage to remove the attachment device.

④ lifting the lifting hook (moving block 434) to lift the components to be removed:

The lifting hoist 431 tightens the lifting steel rope 435, and the lifting steel rope 435 passes through the fixed block 432, the lifting pulley 433 arranged at the free end of the main pole 3 and the moving block 434 below the lifting pulley 433, and then controls the lifting pulley 434. The moving tackle 434 rises, thereby realizing the lifting of the component to be disassembled.

(4) Control the lifting of the main pick-up bar 3 that has been dismantled and move to the top of the lowering area:

The lowering area is located below the boom 103 of the tower crane.

Through the aforesaid left and right rotation control process of the picker hanger, the main picker bar 3 is turned left and right to the top of the lowering area.

(5) After lowering the removed components, repeat the above (2)-(4) and continue to remove other components to be removed:

Start the lifting hoist 431 again to release the lifting steel rope 435, and control the lifting hook (moving block 434) to descend, so that the components to be removed that are bound to the lifting hook (moving block 434) will fall to the ground.

Since there are often many attachment devices to be removed, after the first attachment device is removed, the above actions need to be repeated until each attachment device is removed.

The removal of the attachment means is carried out from top to bottom. When removing the attached device, the principle of lowering first and then removing must be strictly followed, that is, when the tower crane frame is lowered to the point where the attached wall can no longer be removed, the attached wall can only be removed. It is strictly forbidden to remove the attached wall first and then lower the tower.

The above descriptions are only some of the embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principles of the present invention. It should be regarded as the protection scope of the present invention.

Claims (15)

1. A pole crane, characterized in that it comprises a pole base connected to a fixed surface, a revolving base arranged on the base of the pole and a main pole hinged with the base of the revolution, and controls the A control system for position switching of the main pick bar; the control system includes a luffing system for controlling the inclination of the main pick bar and a rotary traction system for controlling the horizontal deflection direction of the main pick bar; the rotary traction system includes setting A left rotary drive mechanism and a right rotary drive mechanism on a rotary control plane parallel to and flush with the base of the grill bar or higher than the free end of the main grill bar, and connecting the left rotary drive mechanism with the main grill The left traction steel rope at the free end of the bar is connected with the right traction steel rope at the free end of the said right rotary drive mechanism and the main pickling rod. 2 . The pole crane according to claim 1 , wherein the pole foundation comprises a foundation beam and a strut set for reinforcing the foundation beam. 3 . 3. The pole picker crane according to claim 2, characterized in that, the set of braces comprises horizontal diagonal braces and vertical diagonal braces. 4. The pole crane according to claim 1, characterized in that, the slewing base includes a slewing support and a connection seat arranged at the upper end of the slewing support; the upper end of the connection seat is provided with a Pivot holes for connections. 5. The pole crane according to claim 4, wherein one end of the main pole is hinged to the upper end of the connecting seat, and the other end is used as a free end for lifting. 6 . The pole crane according to claim 1 , wherein the control system further comprises a hoisting system for lifting by using the main pole. 7 . 7. The pole crane according to claim 6, characterized in that, the hoisting system comprises a hoisting winch arranged on the foundation of the pole, a fixed tackle arranged on the axis of the foundation of the pole, The hoisting pulley located at the free end of the main pick-up bar, the moving block hanging below the lifting block, and the lifting block extending from the lifting hoist and passing through the fixed block, the lifting pulley and the moving block in sequence, and finally A hoisting steel rope fixed to the free end of the main pick-up rod. 8. The pole crane according to claim 7, characterized in that, the hoisting hoist and the slewing base are respectively arranged at two ends of the pole foundation. 9. The pole crane according to claim 7, characterized in that, the hoisting system further comprises a guide wheel connected to the slewing base through a steel rope, and the hoisting steel rope comes from the lifting hoist Extended and passed through the fixed block, guide wheel, lifting pulley and moving block in turn and finally fixed on the free end of the main pick bar. 10. The pole crane according to claim 1, characterized in that, the luffing system includes a luffing drive mechanism and a fixed tackle arranged on the axis where the pole foundation is located, and one end is fixedly connected to the luffing driving mechanism and the other end is anchored to the luffing steel rope at the free end of the main pole after passing through the fixed pulley. 11. A tower crane, which at least includes a tower body, a tower crane sleeve frame sleeved on the tower body, a lifting arm extending perpendicular to the tower body above the tower crane sleeve frame, and relative to the tower crane The balance arm with the boom extending in the opposite direction is characterized in that the tower crane set is provided with the pole crane according to any one of claims 1-10. 12. The tower crane according to claim 11, characterized in that, the pick-up base of the pick-up crane is fixed to the surface of the tower crane casing. 13. The tower crane according to claim 12, characterized in that, the temporary fixation between the pole foundation and the tower crane frame is temporarily fixed by means of bolt connection. 14. The tower crane according to claim 12, characterized in that, the driving mechanism and fixed block of the luffing system are arranged on the tower body and/or the tower crane frame. 15. The tower crane according to claim 12, characterized in that, the plane where the boom and the balance arm are located serves as the slewing control plane of the slewing traction system.