Prefabricated stair hoisting method and point position balance alarm device used by same

Abstract

The invention discloses a prefabricated stair hoisting method and a point position balance alarm device used in the prefabricated stair hoisting method.The device comprises a box body, four electronic hoist scales are installed in the box body, and a single-chip microcomputer which has a data sending function and can transmit a measured tension value to a central area balance data module in real time is installed in each electronic hoist scale; the single-chip microcomputer analyzes the received data, and when the received data exceed a preset threshold value (1.15 times of a theoretical value), an early warning signal is sent out and is sent to the wireless alarm through the wireless transmitter for automatic alarm prompt. The single-chip microcomputer can set parameters according to different hoisting objects each time. The device is suitable for hoisting load-carrying object components within the range of 10t. When an accident occurs in the hoisting and hoisting process, the hoisting alarm prompt can be stopped immediately, and the problems of a sling, a shackle, a rotary hoisting ring or a factory component which have quality problems can be checked and replaced, so that the occurrence of safety accidents is avoided.

Description

Technical Field

[0001] The invention belongs to the field of construction or industry, and in particular relates to a prefabricated stair hoisting method and a point balance alarm device used therein. Background Art

[0002] There are mainly cast-in-place stairs, prefabricated stairs and assembled stairs. Stairs are the main vertical transportation and emergency evacuation channels of buildings, and are used for transportation between floors and when there is a large height difference. There are mainly cast-in-place stairs, prefabricated stairs and assembled stairs. During the installation and construction of prefabricated stairs, the stairs must be hoisted.

[0003] At present, the transportation and installation of prefabricated stairs are mainly carried out by hoisting tools, usually using wire ropes, hoists, safety straps and lifting rings to connect various small hoists, pre-embed four lifting points in the upper and lower sections of the stairs, and use four points to lift the prefabricated stairs. The lifting tools are connected to the pre-embedded lifting points of the prefabricated stairs, and the lifting points are fixed. However, the wire rope is unstable and easy to shake during the lifting process, which poses certain safety hazards. In particular, if the shackle on one of the lifting points breaks, the rotating lifting ring and the pre-embedded sleeve sliding buckle fail during the lifting process, it will inevitably cause a safety accident and affect the construction. Summary of the invention

[0004] In order to solve the problem of safety accidents caused by the breakage of slings and shackles and the failure of rotating lifting rings and embedded sleeve sliding buckles, the present invention provides a prefabricated staircase hoisting method and a point balance alarm device used therein.

[0005] The invention adds a point balance alarm device before lifting in addition to the four lifting points designed for the prefabricated staircase before leaving the factory through weight calculation.

[0006] A point balance alarm device includes a box body, a lifting ring is connected to the upper part of the box body, the lifting ring is fixedly connected to the box body, 4 electronic crane scales are installed inside the box body, and a hook is provided. The data of the electronic crane scales are respectively connected to the balance data module in the central area of ​​the box body, the electronic crane scales are electrically connected to the balance data module, the balance data module is fixedly connected to the box body, a single-chip microcomputer and a wireless transmitter are arranged in the balance data module, and the single-chip microcomputer and the wireless transmitter are electrically connected. A battery is fixedly connected to the top surface of the box body.

[0007] When one or more of the tension values ​​of the four stress points set by the balance data module are obviously uneven after lifting and balancing, and reach the set alarm value, the balance data module will send a warning signal to the wireless alarm through the wireless transmitter for automatic alarm prompt. The upper part of the infinite alarm is an alarm indicator light, and the lower part of the alarm indicator light is a plastic shell. The alarm indicator light is rotatably connected to the plastic shell, and the plastic shell has a built-in wireless receiver. The wireless receiver is fixedly connected to the plastic shell, and the outside of the plastic shell is fixedly connected with the alarm power switch and the volume adjustment knob. The bottom of the plastic shell has a fixedly connected strong magnetic adsorption mounting base. The alarm can be placed on the plane of the crane cab or adsorbed on the vertical wall for use.

[0008] Preferably, the box body of the point balancing device is welded.

[0009] Preferably, the upper lifting ring of the device box is made of high-strength and wear-resistant manganese steel lifting ring.

[0010] Preferably, the single chip microcomputer model is STM32F407VGT6.

[0011] Preferably, the electronic crane scale model is OCS-3A.

[0012] The weight of a prefabricated staircase is 1.6t, and the weight of each shackle equipped with the sling is 1.3t, which meets the lifting requirements. The weight of each sling, shackle and swivel ring is 0.01t. Through force analysis and calculation, the length of the first two slings is 2.09m, the length of the rear two slings is 3.01m, the tension of each sling is 0.409t, and the tension of each hook of the point balance alarm device is 0.419t (including the weight of the sling, shackle and swivel ring).

[0013] Taking into account the wind load occurring during the hoisting process and the changes in the center of gravity offset load caused by shaking, the tension data that triggers the alarm is calculated with a safety factor of 1.15 times the theoretical value. That is, assuming that one of the four hooks becomes loose, and the original tension values ​​of the other three hooks are 0.419t, when it reaches 0.482t, that is, when the tension value of the loose hook drops to 0.230t, an early warning signal is issued.

[0014] A method for hoisting prefabricated stairs: first, use a steel wire rope to hang the point balance alarm device on the hook of a tower crane or lifting machinery, then connect four slings that can carry the prefabricated stairs to the hooks at the four corners of the point balance alarm device, and finally connect the hooks at the ends of the four slings with shackles and rotating rings, and the rotating rings are reliably connected to the built-in sleeves of the staircase plate. At the same time, add a safety rope to the upper and lower sections of the prefabricated stairs, hang them on the hooks at the ends of the slings, and use the point balance alarm device to play a double insurance role. At this time, the prefabricated stairs are tested to make the step plane in a horizontal state during the hoisting process.

[0015] The lifting and installation of prefabricated stairs must ensure that the inclination of the stair treads of the prefabricated stairs is consistent with the inclination required by the design drawings. This can ensure the smooth installation of the prefabricated stairs. At the same time, the four lifting points must be subjected to the same force, and the point balance alarm device must be in a state of force balance. For this reason, the lengths of the four front and rear slings are determined based on the inclination angle of the stair treads.

[0016] The point balance alarm device of the present invention has a simple structure, strong anti-interference ability, stable operation, intelligent module, combined with intelligent algorithm, data acquisition and fusion processing technology, real-time monitoring and sound and light early warning alarm function.

[0017] The box is made of low-carbon steel plate. The alarm device flashlight is made of rotating warning light, with strong light, loud sound, simple installation, and built-in magnets to adsorb on metal walls. It can also be fixed with screws, which is more effective at night. Early warning information can be sent to the rigging operator and operator simultaneously.

[0018] The present invention can effectively avoid the occurrence of safety accidents. It is applicable to multiple scene projects such as the construction field and the industrial field, and has strong compatibility. It can pre-control hoisting safety accidents, realize the transformation from human defense to technical defense, from post-passive supervision to pre-active supervision, and from static supervision to real-time dynamic supervision, so as to achieve the goal of minimizing or even eliminating safety accidents. It greatly reduces the occurrence of accidents and provides safety guarantee for construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a diagram of the use state of the present invention (prefabricated staircase hoisting); Figure 2 It is a partial enlarged diagram of the use state diagram of the present invention (prefabricated staircase hoisting); Figure 3 It is a structural diagram of the present invention; Figure 4 is an enlarged view of the balance data module in the structural diagram of the present invention; Figure 5 It is a structural schematic diagram of the wireless alarm in the present invention.

[0020] In the figure, 1. crane hook, 2. wire rope, 3. lifting ring, 4. box, 5. electronic crane scale, 6. balance data module, 7. single-chip microcomputer, 8. wireless transmitter, 9. battery, 10. hook, 11. prefabricated stairs, 12. embedded sleeve, 13. rotating lifting ring, 14. shackle, 15. sling, 16. safety insurance rope (lifting sling), 17. wireless alarm, 18. alarm indicator light, 19. plastic shell, 20. wireless receiver, 21. alarm battery, 22. alarm power switch, 23. volume adjustment knob, 24. strong magnet. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 , Figure 2 As shown in the figure, the hoisting method of the prefabricated staircase and its partial enlarged view, the lifting ring 3 on the upper part of the point balance alarm device box 4 is hung on the lifting hook 1 of the lifting machinery with a wire rope 2, and the four lifting ropes 15 are respectively hung on the hook 10 of the electronic crane scale 5 in the point balance alarm device, and the end hook of the lifting rope 15 is detachably connected to the rotating lifting ring 13 with a shackle 14, and the rotating lifting ring 13 is detachably connected to the embedded sleeve 12 built into the prefabricated staircase 11. The safety insurance rope (lifting sling) 16 is connected to the end hook of the lifting rope 15 in a ring shape.

[0023] The specification of lifting ring 3 is M30, with a maximum load of 2.5t.

[0024] Sling 15 load 2t.

[0025] The specifications of electronic crane scale 5 are 250×200×100 (height) and the weighing capacity is 3t.

[0026] The maximum load of shackle 14 is 1.3t.

[0027] The specification of the swivel eye 13 is M16.

[0028] The specification of embedded sleeve 12 is A28.

[0029] Figure 3 , Figure 4 As shown, the point balance alarm device and its partial enlarged view include a box body 4, which is made of welded steel plates. The upper part of the box body 4 is connected to a lifting ring 3, and the lifting ring 3 is fixedly connected to the box body 4. Four electronic crane scales 5 are installed inside the box body 4 and are equipped with a hook 10.

[0030] The data of the electronic crane scale 5 are respectively connected to the balance data module 6 in the center area of ​​the box body, the electronic crane scale 5 is electrically connected to the balance data module 6, the balance data module 6 is fixedly connected to the box body 4, the balance data module 6 is fixedly connected to the single chip computer 7 and the wireless transmitter 8, and the single chip computer 7 and the wireless transmitter 8 are electrically connected. A battery 9 is fixedly connected to the top surface of the box body 4.

[0031] When one or more of the tension values ​​of the four stress points set by the balance data module 6 are obviously uneven after lifting and balancing, and reach the threshold, the balance data module 6 will send a warning signal to the wireless transmitter 8. Figure 5 In the schematic diagram of the wireless alarm, the wireless receiver 20 performs an automatic alarm prompt.

[0032] Among them: the specifications of box 4 are 800mm (length) × 500mm (width) × 150mm (height), and the steel plate thickness is 15mm.

[0033] Figure 5 As shown, the upper part of the infinite alarm 17 is an alarm indicator light 18, the lower part of the alarm indicator light 18 is a plastic shell 19, the alarm indicator light 20 is rotatably connected to the plastic shell 19, and the plastic shell 19 has a built-in wireless receiver 20. The wireless receiver 20 is fixedly connected to the plastic shell 19, the inner bottom of the plastic shell 19 is fixedly connected to the alarm battery 21, the outer side of the plastic shell 19 is fixedly connected to the alarm power switch 22 and the volume adjustment knob 23, and the bottom of the plastic shell 19 is fixedly connected to a strong magnetic block 24 for adsorbing the mounting base.

[0034] Working principle: 4 electronic crane scales 5 are installed inside the box 4 of the point balance alarm device. The electronic crane scales 5 are installed with a data transmission function, which can transmit the measured tension value to the single-chip microcomputer 7 in the central area balance data module 6 in real time. During the trial lifting process, once the embedded sleeve 12 built into the prefabricated staircase 11 is loose or slipped, or there are special circumstances such as quality defects in the shackle 14 and the sling 15, the balance data module 6 inside the device will be triggered immediately. The single-chip microcomputer 7 analyzes the received data. When it exceeds the preset threshold (1.15 times the theoretical value), it sends out a warning signal and sends the signal to the wireless receiver 20 through the wireless transmitter 8 for automatic alarm prompts. The wireless alarm 17 installed in the cab will sound synchronously. When this happens during the trial lifting process, the lifting work should be stopped immediately, and the sling 15, shackle 14, rotating ring 13, and factory embedded sleeve 12 with quality problems should be checked and replaced to avoid safety accidents.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A point balance alarm device, comprising a box, a lifting ring connected to the upper part of the box, and a fixed connection between the lifting ring and the box. Its characteristics are Four electronic crane scales equipped with hooks and a balance data module are installed inside the box; the electronic crane scale is electrically connected to the balance data module, and the balance data module is fixedly connected to the box; a single-chip microcomputer and a wireless transmitter are set in the balance data module, the single-chip microcomputer and the wireless transmitter are electrically connected, and a battery is fixedly connected to the top surface of the box; the electronic crane scale transmits the tension values ​​of the four suspension ropes to the single-chip microcomputer in real time, and the single-chip microcomputer judges the tension value. If the tension value exceeds the set threshold range, the single-chip microcomputer sends a signal through the wireless transmitter, and the wireless receiver receives the signal from the wireless transmitter, triggering a buzzer alarm.

2. A method for hoisting prefabricated stairs, Its characteristics are The steps include: (1) Hang the lifting ring on the upper part of the point balance alarm device described in claim 1 to the hook of the lifting machinery with a steel wire rope; (2) Connect the four slings for hoisting the prefabricated stairs to the hooks at the four corners of the point balance alarm device; (3) Connect the hooks at the ends of the four slings with shackles and swivel rings, and then reliably connect the swivel rings with the built-in sleeves of the stair treads to keep the step plane in a horizontal state during the lifting process; (4) Add a safety rope to the upper and lower parts of the prefabricated stairs, hang them on the lifting rings at the end of the lifting slings, and conduct a trial lift of the prefabricated stairs.

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