A construction basket overloading early warning device

Abstract

The utility model discloses a kind of construction basket overweight early warning equipment, including bottom plate, enclosure, electrical control frame, alarm, safety lock, steel wire rope and elevator, three first grooves are opened in bottom plate, receiving plate is arranged in first groove, distance sensor is fixedly connected in the center of first groove, spring rod is fixedly connected in the first groove of bottom plate, utility model is configured receiving plate, distance sensor and spring rod independently in every groove by setting three first grooves in bottom plate, form distributed load monitoring network, can accurately capture basket local overload, avoid the misjudgment or the false alarm caused by uneven load distribution in background technology Single-point elastic piece, and utilize distance sensor real-time monitoring receiving plate displacement, directly converted into electric signal, response speed is faster, can capture the subtle change of instantaneous overload, and elastic piece in background technology relies on mechanical deformation trigger contact switch, there is delay and contact wear risk.

Description

Technical Field

[0001] This utility model relates to the field of construction suspended platform technology, specifically to an overload warning device for construction suspended platforms. Background Technology

[0002] A construction suspended platform is a suspended device that is suspended above a building and uses a hoist to drive the suspended platform to move up and down along the facade. Common construction suspended platforms mainly consist of a suspension mechanism, a suspended platform, a hoist, a safety lock, wire ropes, and an electrical control system.

[0003] According to the Chinese Patent Publication No. CN219993064U, entitled "Overload Warning Device for Construction Suspended Platforms," ​​the device mainly includes a suspended platform load-bearing capacity control elastic component, an upper connector, a lower connector, an upper connecting rod, a lower connecting rod, an upper conductive rod, a lower conductive rod, a normally closed contact switch, a power supply, and an alarm device. The suspended platform load-bearing capacity control elastic component is vertically arranged. The upper and lower connectors are spaced apart vertically. The upper connector is located on the upper end of the suspended platform load-bearing capacity control elastic component, and the lower connector is located below and connected to the lower end of the suspended platform load-bearing capacity control elastic component. Both the upper and lower connectors are used to connect the suspended platform suspension wire rope. The upper and lower conductive rods are both vertically arranged and spaced apart vertically, both located to the right of the suspended platform load-bearing capacity control elastic component. The normally closed contact switch is located at the lower end of the upper conductive rod and the lower... The upper ends of the conductive rods are connected to the lower ends of the upper conductive rod and the lower conductive rod, respectively. Both the upper and lower ends of the upper and lower conductive rods are connected to the power supply. The alarm device is connected in parallel with the normally closed contact switch. The upper and lower connecting rods are both arranged in the left-right direction. The upper connecting rod is located between the upper end of the suspended basket load control elastic element and the upper end of the upper conductive rod, respectively connecting the upper end of the suspended basket load control elastic element and the upper end of the upper conductive rod. The lower connecting rod is located between the lower end of the suspended basket load control elastic element and the lower end of the lower conductive rod, respectively connecting the lower end of the suspended basket load control elastic element and the lower end of the lower conductive rod. The normally closed contact switch is in a closed state. When the suspended basket load control elastic element extends vertically to a length exceeding the desired length, the normally closed contact switch opens.

[0004] The aforementioned patent describes a suspended platform load-bearing control elastic element that is vertically arranged. An upper and lower connecting element are spaced apart vertically. The upper connecting element is positioned on the upper end of the load-bearing control elastic element, while the lower connecting element is located below and connected to the lower end of the load-bearing control elastic element. Both the upper and lower connecting elements are used to connect the suspended platform's suspension wire rope. Both the upper and lower conductive rods are vertically arranged and spaced apart vertically, and both are located to the right of the load-bearing control elastic element. A normally closed contact switch is located between the lower end of the upper conductive rod and the upper end of the lower conductive rod, and is connected to both ends of the upper and lower conductive rods respectively. Both the upper and lower ends of the upper and lower conductive rods are connected to a power source. An alarm device is connected in parallel with the normally closed contact switch. Both the upper and lower connecting rods are arranged in the left-right direction. The upper connecting rod is located between the upper end of the load-bearing control elastic element of the suspended platform and the upper end of the upper conductive rod, connecting both the upper end of the load-bearing control elastic element and the upper end of the upper conductive rod. The lower connecting rod is located between the lower end of the load-bearing control elastic element and the lower end of the lower conductive rod, connecting both the lower end of the load-bearing control elastic element and the lower end of the lower conductive rod. The normally closed contact switch is in the normally closed state. When the load-bearing control elastic element of the suspended platform extends vertically to a length exceeding the desired length, the normally closed contact switch opens. Therefore, it can provide an overload alarm when the construction suspended platform is overloaded, promptly reminding construction personnel and effectively preventing safety accidents caused by overloading of the construction suspended platform. It is suitable for large-scale promotion and application.

[0005] However, while the elastic element can provide overload warnings, the environment in which the construction scaffold is located is complex in actual applications. For example, when heavy objects are placed at intervals on the construction scaffold, the probability of instantaneous overload of the elastic element increases, leading to equipment failure. Utility Model Content

[0006] In view of the deficiencies in the existing technology, this utility model provides an overload warning device for construction scaffolds to reduce the probability of instantaneous overload of elastic components and improve the service life of the equipment.

[0007] The technical solution adopted by this utility model to solve the technical problem is: an overload warning device for construction suspended scaffolds, including a base plate, a surrounding frame, an electrical control frame, an alarm, a safety lock, a wire rope and a hoist. The base plate has three first grooves, and a receiving plate is set in the first groove. A distance sensor is fixedly connected to the center of the first groove. A spring rod is fixedly connected to the base plate in the first groove, and the moving end of the spring rod is fixedly connected to the receiving plate.

[0008] As a preferred technical solution of this utility model, the base plate is fixedly connected to a buffer plate in the first groove, and a U-shaped rubber pad is fixedly connected to the upper end of the buffer plate.

[0009] As a preferred technical solution of this utility model, the four sides of the upper end of the base plate are fixedly connected with clamping plates by bolts. The clamping plates have a Z-shaped structure, the clamping plates correspond to the receiving plates, and the clamping plates and the receiving plates are fixedly connected with gaskets on the opposite side by adhesive.

[0010] As a preferred technical solution of this utility model, the upper sides of the receiving plate are fixedly connected with protective plates, and the protective plates are located inside the frame.

[0011] As a preferred technical solution of this utility model, a clamping frame is fixedly connected to the upper side of the frame by bolts, a connecting block is fixedly connected to the upper end of the clamping frame, and an angle sensor is fixedly connected to one side of the connecting block.

[0012] As a preferred technical solution of this utility model, an industrial camera is fixedly connected to one side of one of the connecting blocks, and the industrial camera corresponds to the steel wire ropes on both sides of the other connecting block.

[0013] As a preferred technical solution of this utility model, the bolt located on the upper side of the frame is fitted with an abutment cylinder, and the abutment cylinder contacts one side of the frame.

[0014] As a preferred technical solution of this utility model, a support column is fixedly connected to the bottom side of the card frame. The support column has an L-shaped structure, and a connecting rod is threadedly connected to the shorter end of the support column. The connecting rod is located at the bottom end of the base plate.

[0015] This utility model has the following advantages:

[0016] (1) By setting three first grooves in the base plate, each groove is independently configured with a receiving plate, a distance sensor, and a spring rod, a distributed load monitoring network is formed. This can accurately capture local overload of the suspended platform (such as the accumulation of heavy objects on one side), avoiding misjudgment or missed detection caused by uneven load distribution of single-point elastic elements in the background technology. Furthermore, by using distance sensors to monitor the displacement of the receiving plate in real time and directly converting it into an electrical signal, the response speed is faster and it can capture subtle changes in instantaneous overload. In contrast, the elastic elements in the background technology rely on mechanical deformation to trigger contact switches, which poses risks of delay and contact wear.

[0017] (2) By setting a buffer plate and a U-shaped rubber pad in the first groove, the impact energy when the heavy object is placed is absorbed, the instantaneous overload pressure of the spring rod is reduced, and the life of the elastic element is extended. Compared with the rigid deformation of a single elastic element in the prior art, it has a greater impact resistance.

[0018] (3) The edge of the receiving plate is fixed by Z-type clamp plate and the side displacement of the receiving plate is restricted by the guard plate to ensure the stability of the load transmission direction, avoid sensor misreading caused by the swaying of the basket, reduce the non-overload deformation of the elastic parts caused by the tilting or vibration of the basket, and trigger false alarms. The upper side of the frame is bolted to the abutment cylinder, and the bottom side of the clamp frame is set with L-shaped support column to strengthen the overall structural rigidity, reduce the interference of external vibration on the sensor, and improve the data reliability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional sectional view of a preferred embodiment of the construction scaffold overload early warning device of this utility model;

[0020] Figure 2 This is a side sectional view of the bottom plate of a construction scaffold overload warning device according to a preferred embodiment of the present invention.

[0021] Figure 3 This is a side view of the frame structure of a construction scaffold overload early warning device according to a preferred embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Enclosure frame; 3. Electrical control frame; 4. Alarm; 5. Safety lock; 6. Wire rope; 7. Hoist; 8. First groove; 9. Support plate; 10. Distance sensor; 11. Buffer plate; 12. Clamping plate; 13. Spring rod; 14. Guard plate; 15. Connecting block; 16. Tilt sensor; 17. Industrial camera; 18. Clamping frame; 19. Support column; 20. Connecting rod; 21. Abutment cylinder. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Please refer to the following: Figure 1-3 The above-described construction scaffold overload warning device includes a base plate 1, a surrounding frame 2, an electrical control frame 3, an alarm 4, a safety lock 5, a wire rope 6, and a hoist 7. The base plate 1 has three first grooves 8, and a receiving plate 9 is installed in each first groove 8. A distance sensor 10 is fixedly connected to the center of each first groove 8. The distance sensor 10 is a potentiometer-type displacement sensor that monitors the displacement of the receiving plate 9 caused by the load in real time, converts it into an electrical signal, and transmits it to the electrical control frame 3. The actual load is calculated through a calibration curve. A spring rod 13 is fixedly connected to the base plate 1 in the first groove 8, and the moving end of the spring rod 13 is fixedly connected to the receiving plate 9.

[0025] The electrical control box 3 has a built-in electrical control circuit board, which is a Siemens S7-1200 PLC or an industrial-grade microcontroller. It can receive signals from the distance sensor 10, the tilt sensor 16, and the industrial camera 17. It controls the alarm 4 and the safety lock 5 through preset algorithms (such as load distribution analysis and tilt threshold judgment) and supports remote data transmission.

[0026] Among them, alarm 4 is a Moflash PA-220 sound and light alarm, which can receive the trigger signal of electrical control box 3 and remind construction personnel of overload or tilting danger through high-brightness LED flashing and buzzing sound. It is usually connected to the control box by a relay or MOSFET drive circuit.

[0027] Among them, the safety lock 5 is a Tractel Speedy centrifugal lock structure. When the tilt angle of the suspended platform exceeds the limit (e.g., ≥14°) or the wire rope 6 becomes loose, the internal centrifugal mechanism triggers the ratchet to engage the wire rope 6, forcibly stopping the movement of the suspended platform. This is linked with the tilt sensor 16 to achieve active protection.

[0028] Among them, the steel wire rope 6 is an aviation-grade galvanized steel wire rope 6.

[0029] Among them, the hoist 7 is a DEMAG KBK ring belt hoisting device, which is driven by a three-phase asynchronous motor to wind / release the steel wire rope 6. The basket is raised and lowered by adjusting the forward and reverse rotation through the electrical control box 3. It has a built-in electromagnetic brake to prevent falling when the power is off.

[0030] Among them, the tilt sensor 16 is a dual-axis MEMS tilt sensing structure. Its principle is based on the decomposition principle of gravity acceleration. It measures the tilt angle of the basket along the X / Y axis. The data is used to determine the stability of the basket. When the threshold is exceeded, the safety lock 5 or an alarm is triggered.

[0031] Among them, the industrial camera 17 is a Hikvision MV-CA series industrial monitoring device, which monitors the surface wear, broken wires and other defects of the steel wire rope 6 in real time through image processing algorithms (such as edge detection and texture analysis), and sends an alarm signal to the electrical control box 3 when abnormality occurs.

[0032] Specifically, when a heavy object presses on the receiving plate 9, the spring rod 13 retracts. Then, the distance sensor 10 monitors the displacement of the receiving plate 9 and transmits it to the electrical control box 3. The electrical control box 3 processes the data and converts it into a load value. However, if an overload occurs, the alarm 4 is triggered, and the hoist 7 stops running. At the same time, when the tilt sensor 16 detects tilting, it triggers the safety lock 5 to lock the wire rope 6. The industrial camera 17 detects the wire rope 6 near the side of the enclosure 2 and transmits the data to the electrical control box 3. The image is uploaded to the control center in real time, and an alarm is triggered. In the initial stage, the buffer plate 11 and the Z-shaped clamping plate 12 absorb the impact of the receiving plate 9 being squeezed and swaying up and down by the heavy object, which can reduce the instantaneous overload of the spring rod 13 and improve the life of the equipment.

[0033] Among them, the base plate 1 is fixedly connected to the buffer plate 11 in the first groove 8, and the upper end of the buffer plate 11 is fixedly connected to the U-shaped rubber pad. The four sides of the upper end of the base plate 1 are fixedly connected to the clamping plate 12 by bolts. The clamping plate 12 has a Z-shaped structure. The clamping plate 12 corresponds to the receiving plate 9, and the opposite side of the clamping plate 12 and the receiving plate 9 is fixedly connected to the gasket by adhesive.

[0034] When a heavy object is placed on the suspended platform, the receiving plate 9 is displaced downward under pressure. The buffer plate 11 and the U-shaped rubber pad absorb the instantaneous impact energy through elastic deformation, preventing the spring rod 13 from directly bearing the peak pressure due to sudden local overload (such as the placement of heavy objects at intervals or rapid stacking). This prevents the spring from fatigue breaking or the sensor from being falsely triggered. The damping characteristics of the rubber pad can disperse the impact force, reduce the repeated and severe deformation of the spring rod 13, delay material fatigue, and improve the durability of the equipment under complex working conditions.

[0035] Among them, the upper ends of the receiving plate 9 are fixedly connected to the protective plates 14 on both sides, and the protective plates 14 are located inside the frame 2.

[0036] By setting up the protective plate 14 in conjunction with the receiving plate 9, the horizontal displacement of the receiving plate 9 is limited, ensuring the accuracy of vertical movement, enhancing structural stability, dispersing local loads, further protecting internal components, and improving environmental adaptability. The frame 2 and the protective plate 14 together form a closed or semi-closed space, blocking construction dust, cement slurry, metal shavings and other debris from entering the groove, and preventing the spring rod 13 from getting stuck, the distance sensor 10 from being contaminated or short-circuited.

[0037] Among them, a frame 18 is fixedly connected to the upper side of the frame 2 by bolts, a connecting block 15 is fixedly connected to the upper end of the frame 18, an angle sensor 16 is fixedly connected to one side of the connecting block 15, an industrial camera 17 is fixedly connected to one side of one of the connecting blocks 15, and the industrial camera 17 corresponds to the steel wire ropes 6 on both sides of the other connecting block 15.

[0038] The tilt sensor 16 and industrial camera 17 mentioned above are common devices in the field of construction suspended platforms, and their structure and principle will not be described in detail here.

[0039] Among them, the bolt sleeve on the upper side of the frame 2 is connected to the abutment cylinder 21, the abutment cylinder 21 is in contact with one side of the frame 2, and the bottom side of the frame 18 is fixedly connected to the support column 19. The support column 19 has an L-shaped structure, and the shorter end of the support column 19 is threadedly connected to the connecting rod 20, which is located at the bottom end of the base plate 1.

[0040] By setting support columns 19 and connecting rods 20 on the bottom side of the frame 18, the contact area can be increased to disperse the local pressure of the bolts on the frame 2, preventing the frame 2 from deforming under the vibration of the hoisting basket or the impact of heavy objects. At the same time, the close contact between the support column 19 and the side of the frame 2 forms an auxiliary support, suppressing the micro-displacement at the connection between the frame 18 and the frame 2, ensuring the installation stability of precision components such as the tilt sensor 16 and the industrial camera 17. The support column 19 adopts an L-shaped structure, with its long arm fixed to the bottom side of the frame 18 and its short arm connected to the bottom end of the base plate 1 through the connecting rod 20, forming a triangular mechanical support. This design can effectively disperse the lateral wind load, hoist vibration and other dynamic forces during the operation of the hoisting basket, preventing the frame 18 from bending or tilting due to uneven force, and ensuring the consistency of the sensor monitoring direction.

[0041] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0042] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An overload warning device for construction suspended platforms, comprising a base plate (1), a surrounding frame (2), an electrical control frame (3), an alarm (4), a safety lock (5), a wire rope (6), and a hoist (7), characterized in that, The base plate (1) has three first grooves (8), and a receiving plate (9) is provided in the first groove (8). A distance sensor (10) is fixedly connected to the center of the first groove (8). A spring rod (13) is fixedly connected to the base plate (1) in the first groove (8). The moving end of the spring rod (13) is fixedly connected to the receiving plate (9).

2. The overload warning device for construction suspended platforms as described in claim 1, characterized in that, The base plate (1) is fixedly connected to a buffer plate (11) in the first groove (8), and a U-shaped rubber pad is fixedly connected to the upper end of the buffer plate (11).

3. The overload warning device for construction suspended platforms as described in claim 2, characterized in that, The base plate (1) has four sides of the upper end fixed with clamping plates (12) by bolts. The clamping plates (12) have a Z-shaped structure. The clamping plates (12) correspond to the receiving plate (9). The clamping plates (12) and the receiving plate (9) are fixed with gaskets on opposite sides by adhesive.

4. The overload warning device for construction suspended platforms as described in claim 3, characterized in that, The upper sides of the receiving plate (9) are fixedly connected with guard plates (14), and the guard plates (14) are located inside the frame (2).

5. The overload warning device for construction suspended platforms as described in claim 4, characterized in that, A frame (18) is fixedly connected to the upper side of the frame (2) by bolts. A connecting block (15) is fixedly connected to the upper end of the frame (18). An angle sensor (16) is fixedly connected to one side of the connecting block (15).

6. The overload warning device for construction suspended platforms as described in claim 5, characterized in that, An industrial camera (17) is fixedly connected to one side of one of the connecting blocks (15), and the industrial camera (17) corresponds to the steel wire ropes (6) on both sides of the other connecting block (15).

7. The overload warning device for construction suspended platforms as described in claim 5, characterized in that, The bolt located on the upper side of the frame (2) is fitted with an abutment sleeve (21), which contacts one side of the frame (2).

8. The overload warning device for construction suspended platforms as described in claim 7, characterized in that, The card frame (18) is fixedly connected to a support column (19) on the bottom side. The support column (19) has an L-shaped structure. The support column (19) is threadedly connected to a connecting rod (20) on the shorter end side. The connecting rod (20) is located at the bottom end of the base plate (1).

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