Large-size super-heavy acrylic glass hoisting construction method without hanging point

Abstract

The application provides a large-size super-heavy acrylic glass no-hanging-point hoisting construction method, comprising the following steps: S1, unloading; S2, connecting a temporary hoisting platform; S3, pretreatment before horizontal transportation; S4, horizontal transportation to a hanging point; S5, hoisting preparation; S6, acrylic glass hoisting; and S7, temporary fixing. The construction method can be suitable for large-size super-heavy acrylic glass without a hanging point, multiple hanging points can be synchronously lifted, the hoisting process is more stable, safe vertical erection and accurate positioning can be realized, and safety and accuracy are combined.

Description

Technical Field

[0001] This invention relates to the field of construction methods, and in particular to a method for hoisting large-size, heavy-duty acrylic glass without lifting points. Background Technology

[0002] With the development of large aquariums, marine theaters, and large-scale landscape architecture, ultra-heavy and large-sized curved acrylic glass (such as curved windows weighing up to 12 tons and over 8.4 meters in height) is widely used. This type of acrylic glass often requires no drilled holes or pre-embedded lifting rings on the surface (i.e., "no lifting points") to avoid stress concentration, cracking, or affecting the visual effect.

[0003] The existing hoisting technology mainly has the following problems: Relying on pre-set lifting points: Traditional large glass hoisting requires pre-embedded lifting lugs or drilled holes in the components, which will damage the integrity of the acrylic structure, create the risk of cracking, and cannot meet the design requirements of no lifting points.

[0004] Large curved components are difficult to hoist stably: The center of gravity of curved acrylic glass is in a special position, and conventional two-point hoisting or binding hoisting can easily cause the component to slide sideways, overturn, or be damaged by excessive local pressure.

[0005] Horizontal transport and vertical conversion are difficult: In confined spaces (such as indoor floors or above existing aquarium tanks), large components need to be transported horizontally to the installation position after unloading and then converted to a vertical state. Existing methods lack dedicated follow-up supports and adjustable positioning mechanisms, resulting in low accuracy and poor safety.

[0006] Three-point synchronous lifting is difficult to control: When lifting at multiple points, asynchronous lifting speeds and displacements at each lifting point can lead to component twisting or secondary stress.

[0007] Therefore, there is a need for a hoisting and installation method specifically for large-size, heavy acrylic glass without lifting points, which can achieve safe, efficient, and non-destructive hoisting and erection, and solve the problems mentioned above. Summary of the Invention

[0008] This invention provides a method for hoisting large-size, heavy acrylic glass without lifting points. By technically modifying existing construction methods, it solves the problems of lacking a safe and reliable hoisting structure, difficulty in horizontal transportation and vertical conversion, and easy damage to large-size and heavy glass.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for hoisting large-size, heavy-duty acrylic glass without lifting points includes the following steps: S1, unloading: The crane and acrylic glass enter the construction site and enter the pre-designated unloading area. Steel plates are laid under the crane outriggers to lift the acrylic glass and its support frame to the ground. S2, Erecting a temporary hoisting platform: Erect a temporary hoisting platform above the installation location and set up three main hoisting points, with hand-operated hoists installed on the main hoisting points; S3, Pre-treatment before horizontal transportation: Check the flatness of the floor of the horizontal transportation route, reinforce weak areas, calculate the total transportation load based on the floor design load, and confirm safety. S4, Horizontal transport to lifting point: The tank is placed at several stress points spaced apart on the bottom surface of the acrylic glass. During horizontal transport, a winch or forklift is used to pull the acrylic glass along with the bracket to move horizontally to the bottom of the lifting platform. During the horizontal transport, a 10mm steel plate is laid under the tank to reduce the pressure on the floor. S5, Preparations before hoisting: Secure the acrylic glass with three anti-slip nylon slings at the predetermined binding points, and connect the upper end of the nylon slings to the hook of the hand chain hoist; S6. Acrylic glass hoisting: Use the hand chain hoists of the three main cranes to slowly lift the acrylic glass by pulling it up at the same time. After it is slightly off the ground, pause and check all connection points and load-bearing points. After confirming that everything is correct, continue to pull up the hand chain hoists of the three main cranes. The bottom follow-up support components will follow until the acrylic glass is in an upright position. S7. Temporary Fixing: After the acrylic glass is erected, place the tripod on the inside and outside of the glass. Use the adjusting screws on the tripod to push the acrylic glass in the middle position for fine adjustment, so as to better calibrate it to the position of the acrylic glass splicing in the subsequent process. Lock the tripod to complete the temporary fixing.

[0010] Preferably, in step S3, a 10mm thick steel plate is laid on the transportation path, and the joints of the steel plates are beveled.

[0011] Preferably, in step S4, eight tanks are selected and evenly spaced at the stress points at the bottom of the acrylic glass bracket.

[0012] Preferably, in step S5, the nylon sling is tied at 1 / 4 of the length of the acrylic glass, and the upper end of the nylon sling has a pre-reserved ring sling structure for connecting to the hook of the hand chain hoist.

[0013] Preferably, in step S6, during the process of lifting the acrylic glass upwards, the bottom follow-up support component always supports the bottom of the glass and rolls forward in the direction of movement of the bottom of the acrylic glass. The rolling speed of the bottom follow-up support component matches the pulling speed of the upper end, so as to keep the bottom of the acrylic glass always supported.

[0014] The beneficial effects of this invention are as follows: 1. This application is suitable for large-size, heavy-duty acrylic glass without lifting points. The three main lifting points are arranged at intervals along the same straight line and connected by lifting straps. This allows the glass to be lifted from the top and naturally rotated around the bottom support point when pulled, which conforms to the physical movement trajectory of the glass from horizontal to vertical, thus avoiding torsion or eccentric force on the glass.

[0015] 2. This application ensures the safety of the foundation throughout the unloading, transportation, and hoisting process by checking the load and pre-treating the floor, thus preventing ground subsidence accidents.

[0016] 3. This application features a bottom-mounted support assembly. Throughout the entire process of flipping and erecting, the bottom support assembly moves with the bottom of the glass, effectively preventing bottom cracking or edge damage caused by the glass sagging under its own weight. It is particularly suitable for large-sized, heavy components.

[0017] 4. This application uses an adjustable tripod for temporary fixation, and makes millimeter-level fine adjustments by adjusting screws to meet the high-precision requirements of subsequent seamless splicing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the construction method of the present invention; Figure 2 This is a schematic diagram showing the location of the temporary hoisting platform of the present invention; Figure 3 This is a schematic diagram of the tank transporting acrylic glass according to the present invention; Figure 4 This is a three-dimensional structural diagram of the hoisting device of the present invention during hoisting; Figure 5 This is a schematic diagram of the front structure of the hoisting device of the present invention; Figure 6 This is a schematic diagram of a manual hydraulic trolley for the bottom follow-up support assembly of the present invention; Figure 7 This is a schematic diagram of the tripod temporary fixing system of the present invention during support; The following are the reference numerals: 1. Temporary hoisting platform; 2. Hand chain hoist; 3. Nylon sling; 3. Ring sling structure; 31. Bottom follow-up support assembly; 4. Tank vehicle; 41. Manual hydraulic vehicle; 42. Elastic buffer pad; 43. Tripod temporary fixing system; 5. Tripod; 51. Support clamp; 52. Adjusting screw; 53. Acrylic glass; 6. Bracket. Detailed Implementation

[0019] The specific content of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0020] Please see Figures 1-7 As shown, this invention provides a method for hoisting large-size, heavy-duty acrylic glass without lifting points, including the following steps: S1. Unloading: The crane and acrylic glass 6 enter the construction site and enter the pre-designated unloading area. Steel plates are laid under the outriggers of the crane to lift the acrylic glass 6 and its bracket 61 to the ground. S2, Erecting temporary hoisting platform 1: Erect a temporary hoisting platform 1 above the installation position and set up three main hoisting points, with a hand chain hoist 2 installed on the main hoisting points; S3, Pre-treatment before horizontal transportation: Check the flatness of the floor of the horizontal transportation route, reinforce weak areas, calculate the total transportation load based on the floor design load, and confirm safety. S4, Horizontal transport to lifting point: The tank 41 is placed at several stress points spaced apart on the bottom surface of the acrylic glass 6. During horizontal transport, a winch or forklift is used to pull the acrylic glass 6 together with the bracket 61 to move horizontally under the lifting platform via the tank 41. During the horizontal transport, a 10mm steel plate is laid under the tank 41 to reduce the pressure on the floor. S5, Preparations before hoisting: Tie the acrylic glass 6 with three anti-slip nylon slings 3 at the predetermined binding points, and connect the upper end of the nylon slings 3 to the hook of the hand chain hoist 2; S6. Acrylic glass 6 hoisting: Use the three main hoists' hand chain hoists 2 to slowly lift the acrylic glass 6 slowly. After it is slightly off the ground, pause and check all connection points and load-bearing points. After confirming that everything is correct, continue to tighten the three main hoists' hand chain hoists 2. The bottom follow-up support component 4 at the bottom will follow until the acrylic glass 6 is in an upright position. S7. Temporary Fixing: After the acrylic glass 6 is erected, the tripod 51 is placed on the inside and outside of the glass. The acrylic glass 6 in the middle position is pushed by the adjusting screw 53 on the tripod 51 to make fine adjustments, so as to better calibrate it to the splicing position of the acrylic glass 6 in the subsequent process. The tripod 51 is then locked to complete the temporary fixing.

[0021] In step S1, the 25-ton truck crane is positioned in the unloading area, and the foundation bearing capacity has been tested and found to be 120 kPa, meeting the requirements. A 1500×1500 mm steel plate is laid under the outriggers. The glass support bracket is then hoisted to the ground.

[0022] Further, in step S3, 10mm thick steel plates are laid along the transport route, with beveled joints at the seams. The floor flatness of the 45-meter-long transport route is checked, with a maximum height difference of 5mm, meeting the requirements. A full 10mm thick steel plate is laid in the tank's travel area, with beveled joints welded between the plates. Calculations show that the total load of the glass, brackets, and tank is approximately 15 tons, and the floor design load is 20kN / m², meeting the requirements.

[0023] Furthermore, in step S4, eight tank vehicles 41 are selected and evenly spaced at the bottom stress points of the acrylic glass bracket 61. The tank vehicles 41 are 5-ton class.

[0024] Acrylic glass 6 was unloaded in the unloading area in advance by a crane, and the acrylic glass 6 and its bracket 61 were lifted to the ground and placed on the tank 41.

[0025] Furthermore, in step S5, the nylon sling 3 is tied at 1 / 4 of the length of the acrylic glass 6. The upper end of the nylon sling 3 has a pre-reserved ring sling structure 31, which is used to connect with the hook of the hand chain hoist 2. The nylon sling 3 is equipped with a flat sling of 10 tons or more.

[0026] Furthermore, in step S6, during the upward lifting of the acrylic glass 6, the bottom follow-up support component 4 always supports the bottom of the glass and rolls forward in the direction of movement of the bottom of the acrylic glass 6. The rolling speed of the bottom follow-up support component 4 matches the pulling speed at the upper end, ensuring that the bottom of the acrylic glass 6 is always supported.

[0027] The bottom follow-up support assembly 4 includes a tank 41 and a manual hydraulic 42. The manual hydraulic 42 is located below the bottom bracket 61 of the acrylic glass 6. An elastic buffer pad 43 is also provided between the manual hydraulic 42 and the acrylic glass 6 bracket 61.

[0028] Furthermore, in step S7, after the acrylic glass 6 is erected, it is temporarily supported and finely positioned by a tripod temporary fixing system 5. The tripod temporary fixing system 5 includes several height-adjustable tripods 51. A support clamp 52 is provided on the top of the tripod 51. The support clamp 52 is arranged on the front and rear sides of the acrylic glass 6. An adjusting screw 53 is installed on the support clamp 52. The adjusting screw 53 is used to finely adjust and position the erected acrylic glass 6.

[0029] This application is adapted to large-size, heavy-duty acrylic glass 6 without suspension points. The three main suspension points are arranged at intervals along the same straight line and connected by a sling ring. This allows the glass to be lifted from the top and naturally rotated around the bottom support point when pulled, which conforms to the physical movement trajectory of the glass from horizontal to vertical, thus avoiding torsion or eccentric force on the glass.

[0030] This application ensures foundation safety throughout the entire process of unloading, transportation, and hoisting by checking the load and pre-treating the floor, thus preventing ground subsidence accidents.

[0031] This application features a bottom-following support component 4. Throughout the entire process of flipping and erecting, the bottom support component moves with the bottom of the glass, effectively preventing bottom cracking or edge damage caused by the glass sagging under its own weight. It is particularly suitable for large-sized, heavy components.

[0032] This application uses an adjustable tripod 51 for temporary fixation, and makes millimeter-level fine adjustments by adjusting screws 53 to meet the high-precision requirements of subsequent seamless splicing.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

[0034] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A method for hoisting large-size, heavy-duty acrylic glass without lifting points, characterized in that, Includes the following steps: S1, unloading: The crane and acrylic glass enter the construction site and enter the pre-designated unloading area. Steel plates are laid under the crane outriggers to lift the acrylic glass and its support frame to the ground. S2, Erecting a temporary hoisting platform: Erect a temporary hoisting platform above the installation location and set up three main hoisting points, with hand-operated hoists installed on the main hoisting points; S3, Pre-treatment before horizontal transportation: Check the flatness of the floor of the horizontal transportation route, reinforce weak areas, calculate the total transportation load based on the floor design load, and confirm safety. S4, Horizontal transport to lifting point: The tank is placed at several stress points spaced apart on the bottom surface of the acrylic glass. During horizontal transport, a winch or forklift is used to pull the acrylic glass along with the bracket to move horizontally to the bottom of the lifting platform. During the horizontal transport, a 10mm steel plate is laid under the tank to reduce the pressure on the floor. S5, Preparations before hoisting: Secure the acrylic glass with three anti-slip nylon slings at the predetermined binding points, and connect the upper end of the nylon slings to the hook of the hand chain hoist; S6. Acrylic glass hoisting: Use the hand chain hoists of the three main cranes to slowly lift the acrylic glass by pulling it up at the same time. After it is slightly off the ground, pause and check all connection points and load-bearing points. After confirming that everything is correct, continue to pull up the hand chain hoists of the three main cranes. The bottom follow-up support components will follow until the acrylic glass is in an upright position. S7. Temporary Fixing: After the acrylic glass is erected, place the tripod on the inside and outside of the glass. Use the adjusting screws on the tripod to push the acrylic glass in the middle position for fine adjustment, so as to better calibrate it to the position of the acrylic glass splicing in the subsequent process. Lock the tripod to complete the temporary fixing.

2. The method for hoisting large-size, heavy-duty acrylic glass without lifting points according to claim 1, characterized in that, In step S3, a 10mm thick steel plate is laid on the transportation path, and the joints of the steel plates are beveled.

3. The method for hoisting large-size, heavy-duty acrylic glass without lifting points according to claim 1, characterized in that, In step S4, eight tanks are selected and evenly spaced at the stress points at the bottom of the acrylic glass bracket.

4. The method for hoisting large-size, heavy-duty acrylic glass without lifting points according to claim 1, characterized in that, In step S5, the nylon sling is tied at 1 / 4 of the length of the acrylic glass. The upper end of the nylon sling has a pre-installed ring sling structure, which is used to connect to the hook of the hand chain hoist.

5. The method for hoisting large-size, heavy-duty acrylic glass without lifting points according to claim 1, characterized in that, In step S6, during the process of lifting the acrylic glass upwards, the bottom follow-up support component always supports the bottom of the glass and rolls forward in the direction of movement of the bottom of the acrylic glass. The rolling speed of the bottom follow-up support component matches the pulling speed at the top, ensuring that the bottom of the acrylic glass is always supported.

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