Tower crane standard section introduction system and method

Abstract

This application relates to the field of tower crane technology, specifically disclosing a tower crane standard section introduction system and its introduction method. The introduction system includes an introduction beam, an introduction trolley, and a lifting hook. The introduction beam is installed on the upper part of the standard section installation area of ​​the tower crane. The introduction trolley can move within the introduction beam. The introduction trolley is equipped with pulleys on its left and right sides, and lifting lugs for connecting the standard section are provided on its front and rear sides. The introduction trolley is equipped with a hook that connects to the lifting hook. The lifting hook is installed on the tower crane's hoisting hook for hoisting the introduction trolley and the standard section. The main body of the introduction beam is made of I-beams. The top of the introduction beam has two sets of notches for the introduction trolley to enter and exit, with each set corresponding to two introduction trolleys. The lower part of the lifting hook is equipped with a hook that cooperates with the hook. The introduction beam can accommodate two introduction trolleys simultaneously, making the introduction process simple and efficient. The introduction beam can be tilted, and the introduction trolley is bolted to the standard section, making it labor-saving and stable when moving on the introduction beam.

Description

Technical Field

[0001] This invention relates to the field of tower crane technology, specifically to a tower crane standard section introduction system and method. Background Technology

[0002] Tower cranes, also known as tower hoisting machines, are commonly used lifting equipment on construction sites. They are mainly used for hoisting raw materials such as steel bars, timber, concrete, and steel pipes for construction. A tower crane consists of four parts: steel structure, working mechanism, electrical system, and safety devices. The steel structure includes the tower body, jib, counterweight jib, slewing bearing, tower top, support base, and base frame. The working mechanism typically includes hoisting mechanism, luffing mechanism, slewing mechanism, traveling mechanism, and jacking mechanism. The electrical system includes motors, controllers, distribution cabinets, and connecting lines. During installation, the tower body needs to be extended to match the building's height. This is generally done by adding standard sections using a jacking method. Jacking mainly relies on a climbing frame and a hydraulic jacking system. The climbing frame is fitted over the standard section at the top of the tower body, and the hydraulic system temporarily supports the upper structure, allowing the standard section to be introduced or removed. The standard sections are connected by high-strength bolts.

[0003] The existing tower crane standard section installation and dismantling system mainly consists of a lifting hook, a guide beam, and a guide trolley. The operation after adding a standard section is completed is as follows: lower the balancing standard section to the ground and replace the lifting hook; lift it to the guide beam and hook the guide trolley; lower the hook to the ground and connect the guide trolley to the standard section using bolts; lift the guide trolley and place it on the guide beam, then detach the lifting hook from the guide trolley; lower the hook to the ground, remove the lifting hook, and lift the balancing standard section using wire ropes; lift the hook to the height of the guide beam, perform balancing, and then perform the jacking and section addition operation. Each jacking operation requires lowering the balancing standard section and then lifting the guide trolley again. If the distance from the ground to the guide beam height is considered one stroke, six strokes are required. This method is inefficient, and the efficiency decreases as the tower crane height increases. In the prior art, patent CN115744677A discloses a tower crane introduction system and its introduction method. Through the design of double-headed hooks and a receiving rod, the crossbeam uses the double-headed hooks to transport standard sections. When the standard section is transported to the introduction beam, the connection of the double-headed hooks is changed, connecting the double-headed hooks to the receiving rod, and then disengaging the double-headed hooks from the crossbeam, completing the connection of the standard section. Although this solution uses double-headed hooks and a receiving rod to reduce the introduction stroke, after the standard section is hoisted to the introduction beam, it needs to be moved to the installation area by an introduction trolley. During the movement, the standard section is in a suspended state. However, the double-headed hooks and the standard section are connected by steel wire ropes, and the standard section is only hung on the introduction trolley by the double-headed hooks. During the movement, the standard section is unstable and prone to swaying, which is not conducive to operator work. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical problem solved by this invention is to provide a tower crane standard section introduction system and method, thereby resolving the instability issue of existing introduction devices.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a tower crane standard section introduction system, including an introduction beam, an introduction trolley, and a lifting hook. The introduction beam is installed on the upper part of the standard section installation area of ​​the tower crane. The introduction trolley can move within the introduction beam. The introduction trolley is provided with pulleys on its left and right sides, and with lifting lugs for connecting the standard section on its front and rear sides. The introduction trolley is provided with a hanging lug that connects to the lifting hook. The lifting hook is installed on the hoisting hook of the tower crane for hoisting the introduction trolley and the standard section. The main body of the introduction beam is made of I-beam. The top of the introduction beam is provided with a notch for the introduction trolley to enter and exit. There are two sets of notches, and the two sets of notches correspond to two introduction trolleys respectively. The lower part of the lifting hook is provided with a hook that cooperates with the hanging lug.

[0006] Furthermore, the guide beam is installed at the lower slewing support of the tower crane, and the tail end of the guide beam is equipped with a height adjustment bolt for adjusting the tilt state of the guide beam.

[0007] Furthermore, the lead beam is provided with an ear seat that connects to the lower slewing support of the tower crane. The ear seat and the lower slewing support are installed by a pin. The ear seat located at the tail end of the lead beam has a waist-shaped hole in the middle that cooperates with the pin.

[0008] Furthermore, a crossbeam is provided at the top of the middle position of the introduction beam, and the introduction beam is provided with an end baffle.

[0009] This invention also discloses a method for introducing standard sections for tower crane installation and dismantling, comprising the following steps: S1. Install the jacking hook on the tower crane's hoisting hook and hook the jacking hook onto the guide trolley; S2. Use bolts to connect the trolley to the standard section; S3. Raise the lifting hook until it reaches the guide beam, align the rollers of the guide trolley with the notch at the top of the guide beam, then lower the guide trolley onto the guide beam, and the lifting hook continues to descend and disengage from the guide trolley. S4. Lower the hoisting hook to the ground, hook the second guide trolley with the lifting hook, and connect the second guide trolley to the second standard section with bolts; S5. The hoisting hook rises to lift the second guide trolley and the second standard section to the height of the guide beam for balancing. S6. Adjust the length of the height adjustment bolts so that the front end of the introduction beam is higher than the rear end to form a slope. Introduce the standard section into the tower crane for installation. After the standard section is installed, remove the connecting bolts between the introduction trolley and the standard section, and push the introduction trolley to the notch on the inner side of the introduction beam. S7. Place the second trolley and the second standard section used for balancing in S5 onto the guide beam through the outer notch on the guide beam. The lifting hook disengages from the second trolley and hooks the trolley located at the inner notch on the guide beam and lifts it out. Then, lower it to the ground to hang the standard section for balancing. After balancing, the second standard section can be installed.

[0010] Furthermore, in step S6, the standard section can be introduced into the tower crane manually or by using hooks.

[0011] Compared to existing technologies, the advantages of this solution are: 1. High lifting efficiency: The guide beam can accommodate two guide trolleys at the same time. After a standard section is added, the guide trolley is pushed to the gap near the inside of the guide beam. The guide trolley with the standard section attached is placed on the guide beam through the gap on the outside of the guide beam. The first guide trolley is lifted away and lowered to the ground to lift the next standard section for balancing. It only takes two strokes to install a standard section and there is no need to change the lifting slings, which greatly improves efficiency. 2. The movement process is labor-saving and stable. By adjusting the height adjustment bolts at the tail end of the guide beam, the tail end of the guide beam moves downward to form an inclined state with a front higher and a rear lower, which has a certain slope. It is easier and less strenuous for the staff to pull the standard section into the tower crane. During the movement, the standard section is bolted to the guide trolley. Compared with the steel wire rope connection, the standard section is more stable during the movement process, which is convenient for the staff to operate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the tower crane installation and dismantling standard section introduction system of the present invention; Figure 2 This is a schematic diagram of the structure of the trolley introduced in this invention; Figure 3 This is a schematic diagram of the beam structure introduced in this invention; Figure 4 This is a schematic diagram of the lifting hook detaching from the lug of the present invention; Figure 5 This is a schematic diagram of the height adjustment bolt of the present invention; In the diagram: 1. Introducing beam; 2. Introducing trolley; 3. Lifting hook; 4. Pulley; 5. Lifting lug; 6. Hanging lug; 7. Lug seat; 8. Lower slewing support; 9. Crossbeam; 10. Height adjusting bolt; 10. Notch; 101. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Implementation, for example, attached Figures 1 to 5 As shown: A tower crane standard section installation and dismantling system includes an introduction beam 1, an introduction trolley 2, and a lifting hook 3. The introduction beam 1 is installed on the upper part of the standard section installation area of ​​the tower crane. The introduction trolley 2 can move within the introduction beam 1. The introduction trolley 2 has pulleys 4 on its left and right sides, and lifting lugs 5 on its front and rear sides for connecting the standard section. The introduction trolley 2 has a hanging lug 6 connected to the lifting hook 3. The lifting hook 3 is installed on the tower crane's lifting hook for lifting the introduction trolley 2 and the standard section. The main body of the introduction beam 1 is made of I-beams, specifically two parallel I-beams. The introduction trolley 2 can move on the lower flange of the I-beams. The top of the introduction beam 1 has a notch 101 for the introduction trolley 2 to enter and exit. There are two sets of notches 101, each corresponding to two introduction trolleys 2, allowing two introduction trolleys 2 to be placed on the introduction beam 1. Figure 3 As shown in the attached diagram, a set of notches 101 corresponds to four pulleys 4 of the trolley 2. Alternatively, a set of notches 101 can be set to two, with one notch 101 corresponding to two pulleys 4 on one side of the trolley 2. The lower part of the lifting hook 3 is provided with a hook that engages with the lug 6. A positioning groove can be provided in the middle of the lug 6 to engage with the hook, preventing slippage during hoisting. The lifting hook 3 can automatically detach or be manually assisted in detaching. During hoisting, the lifting hook 3 is lowered below the lug 6 and then lifted upwards to connect with the lug 6. After the lifting hook 3 lifts the trolley 2 and places it on the guide beam 1, the lifting hook 3 continues to descend to a certain height and can slide out of the lug 6. Figure 4 As shown, automatic disengagement is complete.

[0015] The guide beam 1 is installed at the lower slewing support 8 of the tower crane. The tail end of the guide beam 1 is equipped with a height adjustment bolt 10 for adjusting the tilt of the guide beam 1. In use, as... Figure 5As shown, tightening the height adjusting bolt 10 extends it and presses against the slewing lower support 8 above the guide beam 1. The tail end of the guide beam 1 moves downward, forming an inclined state with a higher front and lower rear, so that the guide trolley 2 can smoothly enter the tower crane. The dotted line in the attached figure represents the inclined guide beam 1. The guide beam 1 is provided with a lug 7 that connects to the slewing lower support 8 of the tower crane. The lug 7 and the slewing lower support 8 are installed by a pin. The lug 7 located at the tail end of the guide beam 1 has a waist-shaped hole in the middle to cooperate with the pin. When the height adjusting bolt 10 extends, the connected pin can move within the waist-shaped hole. A crossbeam 9 is provided at the top of the middle position of the guide beam 1 to prevent lateral displacement when lifting heavy objects. The crossbeam 9 is located at the top to avoid obstructing the movement of the guide trolley 2 inside the guide beam 1. The guide beam 1 is provided with an end baffle to prevent the guide trolley 2 from rushing out of the guide beam 1.

[0016] A method for introducing standard sections for tower crane installation and dismantling includes the following steps: S1. Install the lifting hook on the tower crane's hoisting hook and hook the lifting hook onto the guide trolley. Manual assistance can be used for hooking. S2. Use bolts to connect the trolley to the standard section; S3. Raise the lifting hook until it reaches the guide beam, so that the rollers of the guide trolley are aligned with the notch at the top of the guide beam. This notch is the outermost notch on the guide beam. Then lower the guide trolley onto the guide beam, and the lifting hook continues to descend and disengage from the guide trolley. S4. Lower the hoisting hook to the ground, hook the second guide trolley with the lifting hook, and connect the second guide trolley to the second standard section with bolts; S5. The hoisting hook rises to lift the second guide trolley and the second standard section to the height of the guide beam for balancing. S6. Adjust the length of the height adjustment bolts so that the front end of the introduction beam is higher than the rear end to form a slope. Introduce the standard section into the tower crane for installation. The standard section can be pulled into the tower crane manually or by using hooks. After the standard section is installed, remove the connecting bolts between the introduction trolley and the standard section, and push the introduction trolley to the notch on the inner side of the introduction beam. S7. Place the second trolley and the second standard section used for balancing in S5 onto the guide beam through the outer notch on the guide beam. The lifting hook disengages from the second trolley and hooks the trolley located at the inner notch on the guide beam and lifts it out. Then, lower it to the ground to hang the standard section for balancing. After balancing, the second standard section can be installed.

[0017] The introduction beam of this system has a notch for the entry and exit of the introduction trolley, facilitating easy docking between the trolley and the beam. Since two introduction trolleys can be placed on the beam simultaneously, the trolley can be installed when hoisting and leveling standard sections, which can then be directly hoisted onto the beam for installation. The introduction beam must be retracted after the section addition operation is completed and the tower crane is returned to normal operating conditions. This introduction system is highly efficient, structurally stable and reliable, and the introduction beam can be tilted, making it easier to move the trolley carrying the standard sections within the beam.

[0018] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tower crane standard section installation and dismantling system, comprising an introduction beam, an introduction trolley, and a lifting hook, wherein the introduction beam is installed on the upper part of the standard section installation area of ​​the tower crane, the introduction trolley is movable within the introduction beam, the introduction trolley is provided with pulleys on its left and right sides, and lifting lugs for connecting the standard section are provided on its front and rear sides, the introduction trolley is provided with a hook for connecting to the lifting hook, and the lifting hook is installed on the tower crane's hoisting hook for hoisting the introduction trolley and the standard section, characterized in that: The main body of the introduction beam is made of I-beams. The top of the introduction beam is provided with a notch for the introduction trolley to enter and exit. There are two sets of notches, and the two sets of notches correspond to two introduction trolleys respectively. The lower part of the lifting hook is provided with a hook that cooperates with the lug.

2. The tower crane standard section introduction system according to claim 1, characterized in that: The guide beam is installed at the lower slewing support of the tower crane, and the tail end of the guide beam is equipped with a height adjustment bolt for adjusting the tilt state of the guide beam.

3. The tower crane standard section introduction system according to claim 1, characterized in that: The lead beam is provided with a lug seat that connects to the lower slewing support of the tower crane. The lug seat and the lower slewing support are installed by a pin. The lug seat located at the tail end of the lead beam has a waist-shaped hole in the middle that cooperates with the pin.

4. The tower crane standard section introduction system according to claim 1, characterized in that: The top of the middle part of the introduction beam is provided with a crossbeam, and the introduction beam is provided with an end baffle.

5. A method for introducing standard sections for tower crane installation and dismantling, characterized in that, Includes the following steps: S1. Install the jacking hook on the tower crane's hoisting hook and hook the jacking hook onto the guide trolley; S2. Use bolts to connect the trolley to the standard section; S3. Raise the lifting hook until it reaches the guide beam, align the rollers of the guide trolley with the notch at the top of the guide beam, then lower the guide trolley onto the guide beam, and the lifting hook continues to descend and disengage from the guide trolley. S4. Lower the hoisting hook to the ground, hook the second guide trolley with the lifting hook, and use bolts to connect the guide trolley to the second standard section; S5. The hoisting hook rises to lift the second guide trolley and the second standard section to the height of the guide beam for balancing. S6. Adjust the length of the height adjustment bolts so that the front end of the introduction beam is higher than the rear end to form a slope. Introduce the standard section into the tower crane for installation. After the standard section is installed, remove the connecting bolts between the introduction trolley and the standard section, and push the introduction trolley to the notch on the inner side of the introduction beam. S7. Place the second trolley and the second standard section used for balancing in S5 onto the guide beam through the outer notch on the guide beam. The lifting hook disengages from the second trolley and hooks the trolley located at the inner notch on the guide beam and lifts it out. Then, lower it to the ground to hang the standard section for balancing. After balancing, the second standard section can be installed.

6. The method for introducing standard tower crane installation and dismantling sections according to claim 5, characterized in that: In step S6, the standard section is introduced into the tower crane manually or by using hooks.

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