A telescopic tower crane with an attachment mechanism and a working method thereof

Abstract

A telescopic tower crane with an attachment mechanism and a working method thereof belong to the technical field of tower cranes of construction machinery. The tower crane includes an installation base, a lifting hydraulic pump station, a climbing frame, a main arm, a main arm attachment mechanism, a main winch of the arm and a counterweight. The main arm attachment mechanism is used to assist the stability of the main arm through the building under construction; the arm is a telescopic arm, and a cable is provided on the telescopic arm, one end of which is connected to the telescopic arm. The other end of the cable is hinged to the cable winch arranged behind the telescopic arm through the main arm top bracket to provide tension. The cable tightens the telescopic arm to reduce the stress on the telescopic arm. The length of the arm can be reduced, which is suitable for operation in a narrow space. The main arm attachment mechanism realizes auxiliary support for the main arm, avoids the overturning of the main arm, and reduces the overturning moment of the main arm. The auxiliary mechanism can move relative to the main arm in the vertical direction, which avoids the gravity of the main arm acting on the attached object and reduces the damage to the attached building.

Description

Technical Field

[0001] The invention relates to a tower crane and a working method thereof, in particular to a telescopic tower crane with an attachment mechanism suitable for use in building construction and a working method thereof, belonging to the technical field of engineering machinery industry. Background Art

[0002] Tower cranes are important equipment for modern construction industry to realize production mechanization and automation, reduce physical labor intensity and improve production efficiency. With the large increase of high-rise and super-high-rise buildings, independent height tower cranes can no longer fully meet the needs of high-height lifting work. When the tower body is high, the tower body bending moment increases and the overall stability of the tower crane decreases. Therefore, when the tower body exceeds the free height, the tower crane must use an attachment strut to attach the tower body to the building to reduce the force on the tower body. As the building rises, the tower crane can use multiple attachment struts to enable the tower crane to reach a higher height. When the tower crane is limited by the construction site, the installation position is at the corner of the building, the attachment spacing is far, and the attachment strut angle is too small. Under unfavorable conditions, the traditional anchoring method is used to make the attachment strut subject to great force, resulting in the attachment strut design section being too large and the length being too long. The existing attachment method completely limits the freedom of the main arm, the main arm cannot move up and down, and the main arm and the attachments are subject to greater force. Summary of the invention

[0003] In view of the deficiencies in the above-mentioned technologies, a telescopic tower crane with an attachment mechanism and a working method thereof are provided, which has a simple structure, is lighter in weight, and can be flexibly connected to a construction building to ensure structural stability.

[0004] To realize the above-mentioned technology, the tower crane with a telescopic boom and an attachment mechanism of the present invention comprises a mounting base of the tower crane, a jacking hydraulic pump station, a climbing frame, a main boom, a main boom attachment mechanism, a main winch of the boom and a counterweight. The main boom is arranged near the construction building, and the main boom is slidably connected to the main boom attachment through the main boom attachment mechanism. The main boom increases with the construction of the building, and the main boom attachment moves upward with the construction of the building, thereby assisting the stability of the main boom through the building under construction. The boom is a telescopic boom, and a cable is provided on the telescopic boom at one end connected to the telescopic boom. The other end of the cable is twisted with a cable winch arranged behind the telescopic boom through the main boom top bracket and provides tension. The cable tightens the telescopic boom to reduce the stress on the telescopic boom.

[0005] The telescopic arm is a three-stage telescopic sleeve structure, in which a linkage hydraulic device is provided to control telescopic movement. A telescopic arm is provided at the front end of the three-stage telescopic sleeve, and the telescopic arm is telescoped in the first-stage telescopic sleeve. The first-stage telescopic sleeve slides and telescopes in the second-stage telescopic sleeve, and so on to realize the three-stage telescopic function. A cable is provided at the front end of the telescopic arm and each stage of the retractable sleeve, which is connected to the cable winch through the top bracket of the main arm.

[0006] A pulley and a steel cable are also provided between the three-stage sleeves of the telescopic arm to assist the telescopic arm to work so as to shorten the volume of the linkage hydraulic device. A traction sliding mechanism is provided in the first-stage telescopic sleeve, and a traction fixer is provided at the tail end of the telescopic arm. The traction fixer realizes the function of telescopic movement in the first-stage telescopic sleeve under the traction action of the traction sliding mechanism, wherein the traction sliding mechanism is specifically a steel cable pulley group: a pulley is provided at the front and rear ends of the first-stage telescopic sleeve, a steel cable is provided between the two pulleys, and the traction fixer at the tail end of the telescopic arm is fixed on the steel cable between the two pulleys. When traction is generated at both ends of the steel cable, the contraction of the telescopic arm is assisted. A linkage hydraulic device is provided at the rear end position of the second-stage telescopic sleeve, a pulley is provided on the linkage hydraulic device, and a pulley and a steel cable are also provided on the inner side of the rear end of the second-stage telescopic sleeve. When the linkage hydraulic device is extended or retracted, one end of the steel cable arranged on the pulley in the second-stage telescopic sleeve is fixed to the telescopic sleeve, and one end is pulled, and the pulley arranged on the outer side of the rear end of the second-stage telescopic sleeve is pulled, thereby assisting in dragging the second-stage telescopic sleeve to telescopically move in the third-stage telescopic sleeve.

[0007] The main arm attachment mechanism includes four fixed brackets a, b, c and d. One end of the fixed brackets a, b, c and d is slidably connected to the main arm, and the other end is connected and supported by the main arm attachment, namely the construction building.

[0008] A lifting frame wrapped around the outside of the main arm is provided at the sliding connection between one end of the fixed bracket a, fixed bracket b, fixed bracket c and fixed bracket d and the main arm. The inside of the lifting frame is slidingly connected to the main arm bracket through four groups of rollers a, roller b, roller c, roller d and an opening and closing fixing device. The opening and closing fixing device is used to fix the lifting frame tightly on the main arm when it rises to a suitable position. Rollers a, roller b, roller c and roller d are driven by a lifting hydraulic pump station.

[0009] The lifting frame has a double-layer frame structure, the inner layer is composed of axis a, axis b, axis c and axis d, and the two ends of axis a, axis b, axis c and axis d are cross-extended, and the outer layer is cross-extended by the two ends of axis a, axis b, axis c and axis d and is provided with fixed axis a, fixed axis b, fixed axis c and fixed axis d. Springs are provided at both ends of all fixed axis to realize pre-pressure and compensate for the position of the main arm when it moves up and down. The axis a, axis b, axis c and axis d are respectively provided with rollers a, roller b, roller c and roller d which are slidably connected with the main arm to enable them to rise along the main arm.

[0010] A working method of a tower crane with a telescopic boom, the steps of which are as follows:

[0011] The main boom of the tower crane is arranged next to the construction building. The height of the main boom increases with the construction of the building. After each increase in the height of the main boom, the main boom attachment mechanism set on the main boom is adjusted to move upward, so that the main boom attachment mechanism always remains close to the upper construction floor of the construction building, thereby achieving auxiliary fixation of the tower crane, and the height position of the main boom attachment mechanism on the main boom and the height in contact with the construction building can be quickly adjusted as needed, thereby achieving rapid deployment of the tower crane as needed. Beneficial Effects

[0012] The boom of the present invention is a telescopic boom, which is lighter than a conventional boom and reduces the mass of the counterweight, effectively improving the safety of the tower crane, reducing the length of the boom, and being suitable for operation in a narrow space; at the same time, a cable is used to connect and tighten each level of the telescopic boom with a cable winch, thereby ensuring the load-bearing capacity of the telescopic boom; a main boom attachment mechanism is provided on the main boom for easy and rapid fixed connection with the construction building, and auxiliary support for the main boom is achieved to avoid overturning of the main boom, reduce the overturning moment of the main arm, and further improve the safety of the tower crane; the auxiliary mechanism and the main arm can move relative to each other in the vertical direction, avoiding the gravity of the main arm on the attached object, reducing damage to the attached building, and at the same time improving the tower crane's resistance to strong winds and strong vibrations, and has wide practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a tower crane with a telescopic boom according to the present invention;

[0014] Figure 2 It is a schematic structural diagram of a telescopic boom of a tower crane with a telescopic boom of the present invention;

[0015] Figure 3 It is a structural schematic diagram of the main arm attachment mechanism of the telescopic arm frame of the present invention.

[0016] In the figure: installation base-1, jacking hydraulic pump station-2, climbing frame-3, main arm-4, main arm attachment mechanism-5, attached object-6, retractable arm frame-7, cable-8, cable winch-9, main winch-10, counterweight-11, linkage hydraulic device-21, fixed bracket a-31, fixed bracket b-32, fixed bracket c-33, fixed bracket d-34, roller a-36, roller b-37, roller c-38, roller d-39, fixed shaft a-41, fixed shaft b-42, fixed shaft c-43, fixed shaft d-44, shaft a-51, shaft b-52, shaft c-53, shaft d-54. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] like Figure 1 and Figure 2As shown, the telescopic tower crane with an attachment mechanism of the present invention comprises a mounting base 1 of the tower crane, a jacking hydraulic pump station 2, a climbing frame 3, a main arm 4, a main arm attachment mechanism 5, a main arm winch 10 and a counterweight 11, and is characterized in that: the main arm 4 is arranged near the construction building, the main arm 4 is slidably connected to the main arm attachment 6 through the main arm attachment mechanism 5, the main arm 4 increases with the construction of the building, and the main arm attachment 6 moves upward with the construction of the building, and the stability of the main arm 4 is assisted by the building under construction; the arm is a telescopic arm 7, and the telescopic arm 7 is provided with a cable 8 at one end connected to the telescopic arm 7, the other end of the cable 8 is mutually hinged with the cable winch 9 arranged behind the telescopic arm 7 through the top bracket of the main arm 4 and provides tension, the cable 8 tightens the telescopic arm 7 to reduce the stress on the telescopic arm 7.

[0019] like Figure 2 As shown, the telescopic boom 7 is a three-stage telescopic sleeve structure, and a linkage hydraulic device 21 is provided inside the three-stage telescopic sleeve to control the telescopic movement. A telescopic arm is provided at the front end of the three-stage telescopic sleeve, and the telescopic arm is telescoped in the first-stage telescopic sleeve, and the first-stage telescopic sleeve is slid and telescoped in the second-stage telescopic sleeve, and so on to realize the three-stage telescopic function; a cable 8 is provided at the front end of the telescopic arm and each stage of the retractable sleeve, and is connected to the cable winch 9 through the top bracket of the main arm 4. Pulleys and steel cables are also provided between the three-stage sleeves of the telescopic boom 7 to assist the telescopic boom 7 in working so as to shorten the volume of the linkage hydraulic device 21. A traction sliding mechanism is provided inside the first-stage telescopic sleeve, and a traction fixture is provided at the tail end of the telescopic arm. The traction fixture realizes the function of telescopic movement in the first-stage telescopic sleeve under the traction action of the traction sliding mechanism, wherein the traction sliding mechanism is specifically a steel cable pulley block: a pulley is provided at the front and rear ends of the first-stage telescopic sleeve, and a steel cable is provided between the two pulleys. The traction fixture at the tail end of the telescopic arm is fixed on the two pulleys. On the steel cable between the wheels, when traction is generated at both ends of the steel cable, the telescopic arm is assisted to retract. A linkage hydraulic device 21 is provided at the rear end position of the second-stage telescopic sleeve, and a pulley is provided on the linkage hydraulic device 21. A pulley and a steel cable are also provided on the inner side of the rear end of the second-stage telescopic sleeve. When the linkage hydraulic device 21 is extended or retracted, one end of the steel cable provided on the pulley inside the second-stage telescopic sleeve is fixed to the telescopic sleeve, and the other end is pulled, so that the pulley provided on the outer side of the rear end of the second-stage telescopic sleeve is pulled, thereby assisting in dragging the second-stage telescopic sleeve to telescope and move in the third-stage telescopic sleeve.

[0020] like Figure 3As shown, the main arm attachment mechanism 5 includes four fixed brackets a31, b32, c33 and d34, one end of each of which is slidably connected to the main arm 4, and the other end of each of which is connected and supported to the main arm attachment 6, i.e., the construction building 35. A lifting frame wrapped around the outside of the main arm 4 is provided at the sliding connection between one end of each of the fixed brackets a31, b32, c33 and d34 and the main arm 4. The lifting frame is slidably connected to the main arm 4 bracket through four groups of rollers a36, b37, c38 and d39 and an opening and closing fixing device. The opening and closing fixing device is used to fix the lifting frame tightly to the main arm 4 when the lifting frame rises to a suitable position. The rollers a36, b37, c38 and d39 are driven by the lifting hydraulic pump station 2. The lifting frame has a double-layer frame structure, the inner layer is composed of shaft a51, shaft b52, shaft c53 and shaft d54, and the two ends of shaft a51, shaft b52, shaft c53 and shaft d54 are cross-extended, and the outer layer is cross-extended by the two ends of shaft a51, shaft b52, shaft c53 and shaft d54, and fixed shaft a41, fixed shaft b42, fixed shaft c43 and fixed shaft d44 are arranged. Springs are arranged at both ends of all fixed shafts to realize pre-pressure and compensate for the position of the main arm 4 when it moves up and down. Shaft a51, shaft b52, shaft c53 and shaft d54 are respectively provided with rollers a36, roller b37, roller c38 and roller d39 which are slidably connected with the main arm 4 so that they can rise along the main arm 4.

[0021] A working method of a tower crane with a telescopic boom and an attachment mechanism, the steps of which are: arranging a tower crane main boom 4 next to a construction building, the height of the main boom 4 increases with the construction of the building, and each time the height of the main boom 4 is increased, the main boom attachment mechanism 5 provided on the main boom 4 is adjusted to move upward, so that the main boom attachment mechanism 5 is always kept close to the upper construction floor of the construction building 35, thereby achieving auxiliary fixation of the tower crane, and the height position of the main boom attachment mechanism 5 on the main boom 4 and the height of contact with the construction building 35 can be quickly adjusted as needed, thereby achieving rapid deployment of the tower crane as needed.

Claims

1. A tower crane with a telescopic boom and an attachment mechanism, comprising a tower crane mounting base (1), a lifting hydraulic pump station (2), a climbing frame (3), a main boom (4), a main boom attachment mechanism (5), a boom main winch (10) and a counterweight (11), characterized in that: The main arm (4) is arranged near a construction building. The main arm (4) is slidably connected to a main arm attachment (6) via a main arm attachment mechanism (5). The main arm (4) increases in height as the building is constructed. At the same time, the main arm attachment (6) moves upward as the building is constructed, thereby assisting the stability of the main arm (4) through the building under construction. The arm of the telescopic tower crane with an attachment mechanism is a telescopic arm (7). The telescopic arm (7) is provided with a cable (8) having one end connected to the telescopic arm (7). The other end of the cable (8) is mutually twisted with a cable winch (9) arranged behind the telescopic arm (7) through a top bracket of the main arm (4) and provides tension. The cable (8) tightens the telescopic arm (7) to reduce the stress on the telescopic arm (7). The telescopic boom (7) is a three-stage telescopic sleeve structure. A linkage hydraulic device (21) is provided inside the three-stage telescopic sleeve to control telescopic movement. A telescopic arm is provided at the front end of the three-stage telescopic sleeve. The telescopic arm is telescoped in the first-stage telescopic sleeve. The first-stage telescopic sleeve is slid and telescoped in the second-stage telescopic sleeve to achieve a three-stage telescopic function. A cable (8) is provided at the front end of the telescopic arm and each stage of the telescopic sleeve and is connected to a cable winch (9) through a top bracket of the main arm (4). The telescopic arm (7) is provided with a pulley and a steel cable between the three-stage sleeves to assist the telescopic arm (7) in working so as to shorten the volume of the linkage hydraulic device (21). A traction sliding mechanism is provided in the first-stage telescopic sleeve, and a traction fixture is provided at the rear end of the telescopic arm. The traction fixture realizes the function of telescopic movement in the first-stage telescopic sleeve under the traction action of the traction sliding mechanism, wherein the traction sliding mechanism is specifically a steel cable pulley block: a pulley is provided at the front and rear ends of the first-stage telescopic sleeve, a steel cable is provided between the two pulleys, and the traction fixture at the rear end of the telescopic arm is fixed on the two On the steel cable between the pulleys, when traction is generated at both ends of the steel cable, the contraction of the telescopic arm is assisted. A linkage hydraulic device (21) is provided at the rear end of the second-stage telescopic sleeve, and a pulley is provided on the linkage hydraulic device (21). A pulley and a steel cable are also provided on the inner side of the rear end of the second-stage telescopic sleeve. When the linkage hydraulic device (21) is extended or retracted, one end of the steel cable provided on the pulley inside the second-stage telescopic sleeve is fixed to the telescopic sleeve, and the other end is pulled, so that the pulley provided on the outer side of the rear end of the second-stage telescopic sleeve is pulled, thereby assisting in dragging the second-stage telescopic sleeve to telescope in the third-stage telescopic sleeve. The main arm attachment mechanism (5) comprises four fixed brackets a (31), a fixed bracket b (32), a fixed bracket c (33) and a fixed bracket d (34); one end of the fixed brackets a (31), the fixed brackets b (32), the fixed brackets c (33) and the fixed brackets d (34) are slidably connected to the main arm (4), and the other ends are connected and supported to the main arm attachment (6), i.e., the construction building (35); A lifting frame wrapped around the outside of the main arm (4) is provided at one end of the fixed bracket a (31), the fixed bracket b (32), the fixed bracket c (33) and the fixed bracket d (34) at a sliding connection with the main arm (4); the lifting frame is slidably connected to the main arm (4) bracket via four groups of rollers a (36), rollers b (37), rollers c (38), rollers d (39) and an opening and closing fixing device; the opening and closing fixing device is used to fix the lifting frame tightly on the main arm (4) when the lifting frame rises to a suitable position; the rollers a (36), rollers b (37), rollers c (38) and rollers d (39) are driven by a lifting hydraulic pump station (2); The lifting frame is a double-layer frame structure, wherein the inner layer is composed of a shaft a (51), a shaft b (52), a shaft c (53) and a shaft d (54), and the two ends of the shaft a (51), the shaft b (52), the shaft c (53) and the shaft d (54) are cross-extended, and the outer layer is cross-extended by the two ends of the shaft a (51), the shaft b (52), the shaft c (53) and the shaft d (54) to provide a fixed shaft a (41), a fixed shaft b (42), a fixed shaft c (43) and a fixed shaft d (44), and springs are provided at both ends of all the fixed shafts to realize pre-pressure and compensate for the position of the main arm (4) when it moves up and down, and the shaft a (51), the shaft b (52), the shaft c (53) and the shaft d (54) are respectively provided with rollers a (36), rollers b (37), rollers c (38) and rollers d (39) which are slidably connected with the main arm (4) so ​​that they can rise along the main arm (4).

2. The telescopic tower crane with an attachment mechanism according to claim 1, characterized in that: The working method steps of the telescopic tower crane with an attachment mechanism are as follows: A tower crane main boom (4) is arranged next to a construction building. The height of the main boom (4) increases with the construction of the building. Each time the height of the main boom (4) is increased, the main boom attachment mechanism (5) provided on the main boom (4) is adjusted to move upward, so that the main boom attachment mechanism (5) is always kept close to the upper construction floor of the construction building (35), thereby achieving auxiliary fixation of the tower crane. The height position of the main boom attachment mechanism (5) on the main boom (4) and the height of contact with the construction building (35) can be quickly adjusted as needed, thereby achieving rapid deployment of the tower crane as needed.

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