Leveling device and method for tilting tower body of tower crane after installation

Abstract

The present invention discloses a leveling device and method for the inclination of the tower body after the installation of a tower crane. The key points of the technical solution are that the device comprises an upper base frame connected to the crane tower body and a lower base frame connected to the embedded foundation section. An adjustment mechanism is arranged between the upper base frame and the lower base frame. The adjustment mechanism comprises a threaded sleeve arranged at the lower end of the upper base frame, an adjustment rod arranged in a vertical and horizontal plane, a locking member arranged at the upper end of the lower base frame, and a fixing member cooperating with the locking member. The fixing member is embedded in the locking member. One end of the adjustment rod is passed through the lower end of the threaded sleeve, and the other end is connected to the fixing member. At least one adjustable strut is arranged between the adjacent adjustment mechanisms. The present invention does not need to disassemble and reinstall the tower crane, reasonably reduces the construction success, and also improves the safety during the adjustment process, improves the safety factor of the operator, effectively shortens the processing cycle, significantly reduces the construction cost, and can effectively guarantee the progress of the project.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting and transportation, and in particular to a leveling device and method for adjusting the inclination of a tower body of a tower crane after installation. Background Art

[0002] With the rapid development of the economy, the construction period has become more and more urgent for the installation of equipment. The installation of each component of the tower crane must not only ensure the safety of operation, but also require high efficiency. In the installation of traditional tower cranes, the bottom foundation section of the tower crane is directly embedded in the cast-in-place concrete foundation structure, and the verticality of the tower body and the horizontal plane cannot be changed after the installation is completed. With the current increasingly complex construction environment, it is inevitable that the foundation will sink or the foundation section of the tower crane will tilt during the concrete solidification process due to failure to follow the specifications during the embedding process. At this time, the traditional treatment method is to dismantle the installed tower crane, re-embed the foundation section or treat the soil structure under the foundation, and reinstall the tower crane after meeting the requirements. Regardless of the solution, it will consume a lot of manpower and material resources, seriously affecting the construction progress and causing huge losses to the entire project. At the same time, there are safety hazards in the treatment process.

[0003] How to design a leveling device and method for the tilt of the tower body after the tower crane is installed to overcome the defects in the above-mentioned prior art and enable the tower crane to continue to be used within a certain tilt range is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0004] In view of the above shortcomings of the prior art, one of the purposes of the present invention is to provide a leveling device for handling the inclination of the tower body after the installation of a tower crane, which does not require the tower crane to be dismantled and reinstalled, reasonably reduces the construction progress, and also improves the safety during the adjustment process.

[0005] The second purpose of the present invention is to provide a method for leveling the tilted tower body of a tower crane after installation, which improves the safety factor of operators, effectively shortens the processing cycle, significantly reduces the construction cost, and effectively guarantees the progress of the project.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a leveling device for the inclination of the tower body of a tower crane after installation, comprising an upper base frame connected to the crane tower body and a lower base frame connected to the embedded foundation section, an adjusting mechanism is arranged between the upper base frame and the lower base frame, the adjusting mechanism comprises a threaded sleeve arranged at the lower end of the upper base frame, an adjusting rod arranged in a vertical horizontal plane, a locking piece arranged at the upper end of the lower base frame and a fixing piece matching the locking piece, the fixing piece is embedded in the locking piece, one end of the adjusting rod is passed through the lower end of the threaded sleeve, and the other end is connected to the fixing piece, at least one adjustable strut is arranged between adjacent adjusting mechanisms; the adjusting mechanisms are respectively arranged at four corner fulcrums between the upper base frame and the lower base frame, and the adjustable struts are all arranged in parallel in pairs; the two ends of the adjustable struts are respectively connected to the upper base frame and the lower base frame through rotatable members, and two adjustable struts parallel to each other are staggered.

[0007] By adopting the above technical solution, the distance setting between the upper base frame and the lower base frame is changed by adjusting the adjustment mechanism, so that the tilting and leveling effect of the tower crane within a certain angle can be quickly achieved; the adjustable support rod can improve the stability between the upper base frame and the lower base frame.

[0008] Preferably, the fixing member is a sphere with an opening at the upper end, and the lower end of the adjusting rod passes through the opening and is movably connected to the sphere.

[0009] By adopting the above technical solution, the sphere can be set to different diameters, so that the adjustment rod can meet the different requirements during the normal operation and tilt adjustment of the tower crane.

[0010] Preferably, the locking member comprises a lower pressing plate and an upper pressing plate which are sequentially arranged at the upper end of the lower base frame, and a cavity for matching the fixing member is provided in the lower pressing plate and the upper pressing plate, and a gap is provided between the fixing member and the inner wall of the cavity.

[0011] By adopting the above technical solution, the movably connected sphere can automatically rotate in the cavity, thereby realizing the change of the angle between the upper and lower frames; the gap is for setting lubricating oil, thereby improving the flexibility of the adjusting rod during scheduling.

[0012] Preferably, the upper pressing plate and the lower pressing plate are both provided with through-type bolt holes on the same axis, and the upper pressing plate and the lower pressing plate are fixed by nuts with bolts passing through the threaded holes.

[0013] By adopting the above technical solution, the upper and lower pressure plates are fixed by nuts, so that the locking effect of the movable ball is achieved, and the setting method of the nuts also facilitates the loosening and tightening operations.

[0014] Preferably, the adjusting rod and the adjustable support rod are both threaded devices with adjustable lengths.

[0015] By adopting the above technical solution, the rotation of the thread can cooperate with the movable ball fixing part to adjust the length, and the structure is simple and easy to operate.

[0016] Preferably, a locking nut sleeved on the adjusting rod is provided at the lower end of the threaded sleeve.

[0017] By adopting the above technical solution, loosening the nut improves safety.

[0018] Preferably, the inner wall of the lower end of the upper pressing plate is provided with a groove, and the lower pressing plate is provided with a through groove.

[0019] By adopting the above technical solution, the flexibility of the sphere rotation is improved; the through groove can be used for the outflow of water, preventing damage caused by long-term accumulation of water, and extending the service life.

[0020] By adopting the above technical solution, the four adjustment mechanisms can form a cube, and the four adjustable struts are respectively arranged on the four faces, so that the force is evenly distributed. The upper and lower staggered settings of each adjustment strut form a triangular angle, which improves the stability of the support. The adjustable struts parallel to each other are staggered, which can further improve the stability of the support.

[0021] The method for leveling the tilted tower body of a tower crane after installation comprises the following steps:

[0022] (1) The lower frame of the leveling device is connected to the embedded foundation section of the tower crane, and the upper frame of the leveling device is connected to the tower crane tower body;

[0023] (2) First, balance the tower crane to ensure that the four adjustment rods are under pressure and add lubricating oil into the rotating cavity of the ball;

[0024] (3) Loosen the bolts and nuts on the upper and lower pressure plates by one turn, and rotate the anti-loosening nut to the bottom of the adjusting rod. The special shape of the lower chassis cavity designed through motion simulation and force analysis can ensure that the ball can rotate in the lower cavity and move within a certain range;

[0025] (4) According to the actual tilt direction, use a wrench to rotate the position adjustment rods of each fulcrum at the same time, and control the screwing length of the adjustment rod and the threaded sleeve of the lower base frame by forward and reverse rotation to change the angle between the upper base frame and the lower base frame, thereby changing the verticality of the tower crane tower connected to the upper base frame;

[0026] (5) After adjusting the adjusting rod until the horizontality of the upper chassis meets the use requirements, tighten the upper pressure plate. Through calculation and simulation, the cavity of the pressure plate can ensure that there is sufficient contact area with the ball of the adjusting rod under various allowable conditions. By pre-tightening the high-strength bolts and nuts, the ball of the adjusting rod can be locked. Rotate the anti-loosening nut to lock the adjusting rod;

[0027] (6) Check whether the adjustable struts and adjustable nuts are loose, check whether the bolts are loose, and complete the leveling of the tower crane if all requirements are met.

[0028] By adopting the above technical solution, the inclination and leveling of the tower crane can be achieved without disassembly, thereby achieving the normal working requirements of the tower crane.

[0029] The beneficial effects of the present invention are as follows: by using the adjusting device, the bottom foundation of the tower crane can be directly pre-buried into the poured concrete foundation structure in an energy-saving manner, the tower body can be adjusted without disassembling and reinstalling the tower crane, so that the tower crane can continue to be used within a certain inclination range, reasonably reducing the construction cost, ensuring the progress of the project, and also ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a plan view of the present invention after installation;

[0031] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0032] Figure 3 It is a partial schematic diagram of the adjustment rod ball of the present invention being arranged in the inner cavity of the locking member;

[0033] Figure 4 It is a schematic diagram of the state of the tower crane after being installed according to the present invention after being tilted;

[0034] Figure 5 It is a schematic diagram of the state of the tower crane after being installed according to the present invention and being adjusted after being tilted;

[0035] Figure 6 is a top view of the present invention;

[0036] Figure 7 It is an enlarged schematic diagram of the present invention after adjusting the tilt.

[0037] In the figure: 1, upper base frame; 2, adjustable support rod; 3, anti-loosening nut; 4, adjusting rod; 5, locking piece; 6, lower base frame; 7, threaded sleeve; 8, fixing piece; 9, lower pressure plate; 10, upper pressure plate; 11, gap; 12, nut; 13, groove; 14, through groove. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. Example

[0039] Reference Figures 1 to 7As shown, a leveling device for the inclination of a tower body of a tower crane after installation comprises an upper base frame 1 connected to the crane tower body and a lower base frame 6 connected to a pre-buried foundation section, an adjusting mechanism is arranged between the upper base frame 1 and the lower base frame 6, the adjusting mechanism comprises a threaded sleeve 7 arranged at the lower end of the upper base frame 1, an adjusting rod 4 arranged in a vertical horizontal plane, a locking member 5 arranged at the upper end of the lower base frame 6 and a fixing member 8 cooperating with the locking member 5, the fixing member 8 is embedded in the locking member 5, one end of the adjusting rod 4 is passed through the lower end of the threaded sleeve 7, and the other end is connected to the fixing member 8, and at least one adjustable strut 2 is arranged between adjacent adjusting mechanisms.

[0040] The fixing member 8 is a sphere with an opening at the upper end, and the lower end of the adjusting rod 4 passes through the opening and is movably connected to the sphere.

[0041] The locking member 5 includes a lower pressing plate 9 and an upper pressing plate 10 which are sequentially arranged at the upper end of the lower base frame 6. The lower pressing plate 9 and the upper pressing plate 10 are both provided with cavities matching the fixing member 8. A gap 11 is provided between the fixing member 8 and the inner wall of the cavity.

[0042] The upper pressing plate 10 and the lower pressing plate 9 are both provided with through-type bolt holes on the same axis, and the upper pressing plate 10 and the lower pressing plate 9 are fixed by the cooperation of bolts and nuts 12, wherein the bolts penetrate the threaded holes and the nuts 12 are sleeved on the bolts.

[0043] The inner wall of the lower end of the upper pressing plate 10 is provided with a groove 13 , and the lower pressing plate 9 is provided with a through groove 14 .

[0044] The adjusting rod 4 and the adjustable strut 2 are both threaded devices with adjustable lengths. The sphere can rotate freely in the cavity of the base of the lower frame 6 when not locked. By rotating the four adjusting rods 4 to change the screwing length of the adjusting rods 4 and the threaded sleeve 7 of the upper frame 1, the angle between the upper and lower frames 6 can be changed, thereby changing the verticality of the tower body of the tower crane connected to the upper frame 1 and the horizontal plane until it meets the use requirements. Then, the adjusting rod 4 sphere is locked by the locking member, and the screwing position of the threaded sleeve 7 of the upper frame 1 is ensured, thereby ensuring the safe use of the tower crane. The use of the leveling device can quickly achieve the tilting and leveling of the tower crane within a certain angle.

[0045] The lower end of the threaded sleeve 7 is provided with a locking nut 3 which is sleeved on the adjusting rod 4 .

[0046] The method for leveling a tower crane after the tower is installed and tilted comprises the following steps:

[0047] (1) The lower base frame 6 of the leveling device is connected to the embedded foundation section of the tower crane, and the upper base frame 1 of the leveling device is connected to the tower crane tower body;

[0048] (2) First, balance the tower crane to ensure that the four adjustment rods 4 are under pressure and add lubricating oil into the rotating cavity of the ball;

[0049] (3) Loosen the high-strength bolts and nuts 12 on the upper and lower pressure plates by one turn, and rotate the anti-loosening nut 3 to the bottom of the adjusting rod 4. The special shape of the cavity of the lower chassis 6 designed through motion simulation and force analysis can ensure that the ball can rotate in the lower cavity and move within a certain range;

[0050] (4) According to the actual tilt direction, use a wrench to simultaneously rotate the position adjustment rods 4 of each fulcrum, and control the screwing length of the adjustment rod 4 and the threaded sleeve 7 of the lower base frame 6 by forward and reverse rotation, so as to change the angle between the upper and lower base frames 6, thereby changing the verticality of the tower crane body connected to the upper base frame 1. The verticality of the tower crane and the tower body can be measured and calculated by external equipment to achieve the required verticality, such as measuring the tower crane and the tower body by a trolley equipped with a weight, and then calculating based on the measured values ​​to achieve the guaranteed verticality;

[0051] (5) After adjusting the adjusting rod 4 until the horizontality of the upper chassis 1 meets the use requirements, tighten the upper pressure plate. Through calculation and simulation, the cavity of the pressure plate can ensure that there is sufficient contact area with the ball of the adjusting rod 4 under various allowable conditions. The ball of the adjusting rod 4 can be locked by pre-tightening the high-strength bolts. Rotate the anti-loosening nut 3 to lock the adjusting rod 4;

[0052] (6) Check whether the adjustable strut 2 and the adjustable nut 12 are loose, check whether the bolts are loose, and complete the leveling of the tower crane if all requirements are met.

[0053] The leveling frame is installed behind the bottom bracket, and the structure is as follows Figure 3 As shown, in this state, the pressure plate is pre-tightened by high-strength bolts to ensure that the ball at the bottom of the adjusting rod 4 is pressed tightly. According to the load on the whole tower crane, the thread, material and ball diameter of the adjusting rod 4 are reasonably designed to make the adjusting rod 4 meet the different requirements during the normal operation and tilt adjustment of the tower crane.

[0054] The leveling chassis is installed at the bottom of the tower crane. The chassis is divided into two parts, the upper chassis and the lower chassis, which are connected in the middle by adjusting rods 4 at four fulcrum positions. The upper chassis 1 can be connected to the tower body of a tower crane with different cross-sections, and the lower chassis 6 can be connected to the pre-buried foundation sections of a tower crane with different cross-sections, which can be widely used in tower cranes of different models. The four adjusting rods 4 are threaded devices with adjustable lengths, and the lower part of the threaded device is a rotatable ball. The ball can rotate freely in the cavity of the base of the lower chassis 6 when it is not locked. By rotating the four adjusting rods 4 to change the screwing length of the adjusting rod 4 and the upper chassis 1 thread sleeve 7, the angle between the upper and lower chassis 6 can be changed, thereby realizing the change of the verticality of the tower body of the tower crane connected to the upper chassis 1 and the horizontal plane until it meets the use requirements, and then the ball of the adjusting rod 4 is locked by the locking member, and the screwing position of the upper chassis 1 thread sleeve 7 is ensured, thereby ensuring the safe use of the tower crane. The use of the leveling device can quickly achieve the tilting and leveling of the tower crane within a certain angle. Example

[0055] The adjustment mechanisms are respectively arranged at four corner support points between the upper base frame 1 and the lower base frame 6, and the adjustable support rods 2 are arranged in pairs in parallel.

[0056] The two ends of the adjustable support rod 2 are staggeredly connected to the upper base frame 1 and the lower base frame 6 through a rotatable member, and the two adjustable support rods 2 parallel to each other are staggered. Example

[0057] The inner wall of the lower end of the upper pressing plate 10 is provided with a groove 13 , and the lower pressing plate 9 is provided with a through groove 14 .

[0058] By adopting the above technical solution, the leveling frame is installed behind the bottom support feet, and the structure is as follows Figure 1As shown, in this state, the high-strength bolts are pre-tightened to ensure that the pressure plate presses the lower ball of the adjustment rod 4. According to the load on the whole tower crane, the thread, material and ball diameter of the adjustment rod 4 are reasonably designed to make the adjustment rod 4 meet the different requirements of the normal operation and tilt adjustment process of the tower crane; after the tower crane tilts, the tower crane is first leveled to ensure that the four adjustment rods 4 are under pressure. Tower crane leveling refers to a method of balancing the weight of the front and rear arms to reduce the bending moment of the tower body when the tower crane is measuring verticality or performing jacking operations. It only needs to be carried out according to the instructions provided by the manufacturer. Since a leveling device is added in the present invention, it is necessary to further calculate the original value to obtain the balancing value after the leveling device is installed, thereby ensuring the compressed state of the four adjusting rods 4, and adding lubricating oil to the spherical rotation cavity; the high-strength bolt nut 12 of the pressure plate is loosened by 1 turn (if the adjusting rod 4 sphere is difficult to rotate, it can be loosened by 0.5-1 turn more according to the actual situation), and the anti-loosening nut 3 is rotated to the bottom of the adjusting rod 4. The special shape of the lower chassis 6 cavity designed by motion simulation and force analysis can ensure the rotation of the sphere in the lower cavity and a certain range of displacement, and the adjusting rod 4 sphere is in the lower chassis 6 state.

[0059] According to the actual tilt direction, use a wrench to simultaneously rotate the fulcrum position adjustment rods 4, and control the screwing length of the adjustment rod 4 and the threaded sleeve 7 of the lower chassis 6 by forward and reverse rotation to change the angle between the upper and lower chassis 6 (such as Figure 7 As shown), the verticality of the tower crane connected to the upper base frame 1 is changed. The verticality is measured by a trolley with a noon, and the verticality is calculated by calculating the data to achieve a 90-degree angle; adjust the adjustment rod 4 until the horizontality of the upper base frame 1 meets the use requirements (≤1 / 1000) (as shown Figure 5 As shown), tighten the pressure plate. Through calculation and simulation, the cavity of the pressure plate can ensure that there is enough contact area with the ball of the adjusting rod 4 under various allowed states. The ball of the adjusting rod 4 can be locked by pre-tightening the high-strength bolts. Rotate the anti-loosening nut 3 to lock the adjusting rod 4.

[0060] Check whether the adjustable nut 12 of the adjustable strut 2 is loose, check whether the bolts at various locations are loose, and complete the leveling of the tower crane if all requirements are met.

[0061] After operating in the above manner, the tower crane can be leveled, thereby achieving the normal working requirements of the tower crane.

[0062] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A leveling device for tilting a tower crane after installation, comprising an upper base frame (1) connected to the crane tower and a lower base frame (6) connected to a pre-buried foundation section, characterized in that: An adjustment mechanism is provided between the upper base frame (1) and the lower base frame (6). The adjustment mechanism comprises a threaded sleeve (7) arranged at the lower end of the upper base frame (1), an adjustment rod (4) arranged in a vertical and horizontal plane, a locking member (5) arranged at the upper end of the lower base frame (6), and a fixing member (8) cooperating with the locking member, wherein the fixing member (8) is embedded in the locking member (5), one end of the adjustment rod (4) is passed through the lower end of the threaded sleeve (7), and the other end is connected to the fixing member (8), and at least one adjustable support rod (2) is arranged between adjacent adjustment mechanisms; the adjustment mechanisms are respectively arranged at four corner fulcrums between the upper base frame (1) and the lower base frame (6), and the adjustable support rods (2) are arranged in parallel in pairs; the two ends of the adjustable support rod (2) are respectively connected to the upper base frame (1) and the lower base frame (6) by a rotatable member, and the two mutually parallel adjustable support rods (2) are arranged alternately; the fixing member (8) is a sphere with an opening at the upper end, and the lower end of the adjustment rod (4) passes through the opening and is movably connected to the sphere.

2. The leveling device for tilting the tower body of a tower crane after installation according to claim 1 is characterized in that: The locking member (5) comprises a lower pressing plate (9) and an upper pressing plate (10) which are sequentially arranged at the upper end of the lower base frame (6); a cavity for matching the fixing member (8) is provided in the lower pressing plate (9) and the upper pressing plate (10); a gap (11) is provided between the fixing member (8) and the inner wall of the cavity.

3. The leveling device for tilting the tower body of a tower crane after installation according to claim 2 is characterized in that: The upper pressing plate (10) and the lower pressing plate (9) are both provided with through-type bolt holes on the same axis, and the upper pressing plate and the lower pressing plate are fixedly arranged by the cooperation of bolts and nuts (12), wherein the bolts penetrate the threaded holes and the nuts (12) are sleeved on the bolts.

4. The leveling device for tilting the tower body of a tower crane after installation according to claim 3 is characterized in that: The adjusting rod (4) and the adjustable support rod (2) are both threaded devices with adjustable lengths.

5. The leveling device for tilting the tower body of a tower crane after installation according to claim 4 is characterized in that: A locking nut (3) sleeved on the adjusting rod (4) is provided at the lower end of the threaded sleeve.

6. The leveling device for tilting the tower body of a tower crane after installation according to claim 2, characterized in that: The inner wall of the lower end of the upper pressing plate is provided with a groove (13), and the lower pressing plate is provided with a through groove (14).

7. The method for leveling a tower crane after installation according to any one of claims 1 to 6, characterized in that: The following steps are involved: The lower base frame of the leveling device is connected to the pre-buried foundation section of the tower crane, and the upper base frame of the leveling device is connected to the tower body of the tower crane; First, balance the tower crane to ensure that the four adjustment rods are under pressure and add lubricating oil into the rotating cavity of the ball; Loosen the bolts and nuts on the upper and lower pressure plates by one circle, rotate the anti-loosening nut to the bottom of the adjusting rod, and the special shape of the lower chassis cavity designed through motion simulation and force analysis can ensure the rotation and displacement of the ball in a certain range in the lower cavity; According to the actual tilt direction, use a wrench to rotate the position adjustment rods of each fulcrum at the same time, and control the screwing length of the adjustment rod and the threaded sleeve of the lower base frame by forward and reverse rotation to change the angle between the upper base frame and the lower base frame, thereby changing the verticality of the tower crane connected to the upper base frame; After adjusting the adjusting rod until the horizontality of the upper chassis meets the use requirements, tighten the upper pressure plate. Through calculation and simulation, the cavity of the pressure plate can ensure that there is enough contact area with the ball of the adjusting rod under various allowed states. The ball of the adjusting rod can be locked by pre-tightening the high-strength bolts and nuts. Rotate the anti-loosening nut to lock the adjusting rod. Check whether the adjustable struts and adjustable nuts are loose, check whether the bolts are loose, and complete the leveling of the tower crane if all requirements are met.

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