Method for testing load intensity of lamp suspension device

Abstract

The invention belongs to the technical field of measurement, and particularly relates to a lamp suspension device load strength test method which comprises the following steps: S1, mounting a fixed pulley; s2, installing an electric capstan; s3, installing a digital display tension meter and a displacement sensor; s4, mounting a steel wire rope; s5, horizontal traction; and S6, dismantling and repairing. Large-mass heavy object suspension in a traditional counterweight method can be avoided, potential safety hazards of counterweight block transportation and stacking and high-altitude operation risks are eliminated, meanwhile, measurement personnel do not need to operate under a measured structure, and personnel injury risks caused by hanger breakage or counterweight falling are avoided.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and in particular relates to a load strength test method for a lamp suspension device. Background Art

[0002] With the popularization of the fully-decorated delivery model in the real estate industry, the requirements for interior decoration of modern high-quality residences are increasing. Large lamps are increasingly used in living rooms, dining rooms and other space areas. Some large lamps can weigh more than 500kg. In order to ensure the stability and safety of large lamps after installation, it is particularly important to conduct load strength tests on lamp fixtures. According to the "Construction Quality Acceptance Code for Building Electrical Engineering", for lamps with a total weight greater than 10kg, their fixtures and suspension devices shall be subjected to strength tests with a constant uniformly distributed load of 5 times the weight of the lamp, and the duration shall not be less than 15 minutes.

[0003] When conducting load strength tests on existing large lamp fixtures, most of them adopt a vertical loading method of hanging counterweights. This method is easy to operate when the lamp weight is ≤50kg, but for large lamps weighing more than 100kg, because the heavy objects need to be hung at 5 times the load, on-site transportation is not only time-consuming and labor-intensive, but also poses a great safety risk in vertical transportation in high-rise residential environments. Secondly, the counterweights are directly suspended under the lamp fixtures by hanging ropes. If the fixtures fail or the hangers slip, it is easy to cause the heavy objects to fall, and the stacking stability of the counterweights is affected by the flatness of the site, posing a risk of overturning. At the same time, the counterweights are mostly temporarily assembled sandbags, concrete blocks, etc., and the weight accuracy is difficult to guarantee. Repeated debugging is required to increase labor costs. After the test, the heavy objects need to be dismantled and removed, and the process is cumbersome and time-consuming.

[0004] Chinese patent CN210893929U discloses a device for a load-bearing test of a large lamp, including a ceiling, a load-bearing measuring device and a remote control, wherein a first hook is arranged in the middle of the lower side of the ceiling, a second hook is arranged in the middle of the upper side of the frame, a third hook is arranged in the middle of the lower side of the frame, an integrated circuit board is fixedly arranged inside the frame, an antenna is arranged at the upper end of the left wall of the frame, a camera is arranged on the upper left side of the frame, an infrared rangefinder is arranged on the upper right side of the frame, a display screen is arranged on the front of the integrated circuit board inside the frame, and a tension sensor is arranged on the lower side of the frame. The patent can perform load strength tests on lamp fixtures and suspension devices with a mass greater than 10kg, but is not suitable for large lamps with a larger mass. When the weight of the lamp reaches 50kg, a 250kg counterweight block must be hung according to the specification requirements. At the same time, the patent lacks hook anti-drop protection means, which poses a very large safety hazard.

[0005] Chinese patent CN201707264U discloses a hoisting load test device, including a structure to be tested and a hand chain hoist, the hand chain hoist is connected to the lower end of the structure to be tested, a tension meter is installed at the lower end of the hand chain hoist, the lower end of the tension meter is hooked to a fixed body by a hook, and the fixed body is fixed on the ground; the structure to be tested is a large or small equipment hook, a suspension bracket or a lifting machinery. The patent performs a hoisting load test on the fixed device by tightening the hand chain hoist, and does not need to hang a counterweight block of a specified weight, but the manual loading speed of the patent is slow, and the tension meter needs to be observed continuously by humans, and the measurement accuracy is insufficient. At the same time, the patent only relies on the built-in brake pad of the hand chain hoist for braking. If the structure to be tested breaks or the fixed body fails, it is easy to cause the hand chain hoist to fall, posing a safety threat to the test personnel at the bottom. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a load strength test method for a lamp suspension device, thereby avoiding the suspension of large-mass heavy objects in the traditional counterweight method, eliminating the safety hazards of transporting and stacking counterweights and the risks of high-altitude operations, and at the same time eliminating the need for measurement personnel to operate directly below the structure being measured, thereby avoiding the risk of personal injury caused by breakage of the hanger or falling of the counterweight.

[0007] The load strength test method of the lamp suspension device of the present invention comprises the following steps: S1. Install the fixed pulley The embedded parts are fixedly installed on the upper floor slab, the fixed pulley position is marked on the lower floor slab directly below the embedded parts and a hole is drilled, and the fixed pulley is fixed to the lower floor slab with bolts; S2. Install the electric winch Fix the connection plate to the shear wall by bolts, and fix the electric winch to the connection plate, so that the center of the embedded part, the center of the fixed pulley and the center of the electric winch are in the same vertical plane; S3. Install digital dynamometer and displacement sensor An upper shackle and a lower shackle are respectively provided at both ends of the digital display tensile gauge. The digital display tensile gauge is hung on the embedded part through the upper shackle, and the digital display tensile gauge is connected to the movable pulley through the lower shackle. Fix the displacement sensor at the bottom of the upper floor slab so that the laser sensing point of the displacement sensor is aligned with the top of the upper shackle; S4. Install wire rope The electric winch is provided with a wire rope, one end of which is provided with a hook, and a lifting ring is fixed on the top of the fixed pulley. The wire rope is passed through the wheel groove of the fixed pulley and the wheel groove of the movable pulley in sequence, so that the hook hooks the lifting ring; S5, horizontal traction Turn on the digital dynamometer and displacement sensor, start the electric winch to tighten the wire rope, and turn off the electric winch when the tension reaches the theoretical tension value; S6. Demolition and repair Remove the wire rope, remove the fixed pulley and electric winch, stick anti-cracking tape on the bolt holes of the lower floor and shear wall, and inject grouting material for maintenance.

[0008] Furthermore, in step S1, the embedded parts include anchor bars and embedded plates, the diameter of the anchor bars is between 14 and 20 mm, the length of the anchor bars embedded in the upper floor slab is greater than or equal to 14 to 16 times the diameter of the anchor bars, and the anchor bars are provided with hooks, and the bending radius of the hooks is between 45 and 55 mm; the embedded plate is generally disc-shaped, the thickness of the embedded plate is between 1 and 3 mm, and the diameter of the embedded plate is between 180 and 220 mm.

[0009] Further, in step S1, a mounting base is provided at the bottom of the fixed pulley, and the mounting base is fixed to the lower floor slab by bolts. The axle radius of the fixed pulley is between 75 and 100 mm, and the distance between the bottom of the wheel groove of the fixed pulley and the lower floor slab is between 100 and 150 mm.

[0010] Further, in step S2, the connecting plate is arranged in a rectangular parallelepiped structure as a whole, a sliding groove is arranged through the middle of the connecting plate, and the connecting plate is provided with four ear plates with holes in cooperation with the electric winch.

[0011] Further, in step S2, the electric winch is fixed to the connecting plate by bolts, the distance between the bottom of the axle of the electric winch and the lower floor slab is between 100 and 150 mm, and a clutch switch is provided on the electric winch.

[0012] Further, in step S3, a sensing plane is provided at the top of the upper shackle in cooperation with the displacement sensor, the distance between the displacement sensor and the sensing plane is between 30 and 80 mm, and a limit rod is provided at the top of the movable pulley in cooperation with the wire rope.

[0013] Further, in step S4, the bending diameter of the lifting ring is between 45 and 55 mm, and the hook and the lifting ring are provided with an anti-slip component.

[0014] Furthermore, in step S4, guard plates are provided along both axial sides of the fixed pulley, and two anti-slip rods and anti-slip U-shaped grooves are fixed on the guard plates in cooperation with the steel wire rope. The two anti-slip rods are respectively provided on both radial sides of the fixed pulley, and the anti-slip U-shaped groove is provided between the fixed pulley and the mounting base, and the distance between the bottom of the wheel groove of the fixed pulley and the anti-slip U-shaped groove is less than 5 mm.

[0015] Further, in step S5, the theoretical pulling force value is equal to five times the weight of the lamp, and after the pulling force reaches the theoretical pulling force value, the electric winch is turned off and left to stand for 15 minutes.

[0016] Furthermore, the diameter of the steel wire rope is between 5 and 6 mm, and the length of the steel wire rope is between 8 and 15 m.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By using an electric winch to pull horizontally instead of hanging the counterweight, measurement personnel do not need to operate directly under the embedded parts, eliminating the risk of personal injury caused by the breakage of the lifting equipment or the falling of the counterweight. At the same time, it avoids the safety hazards of handling, vertical transportation and stacking of heavy objects during large-scale lamp testing, thereby improving test safety.

[0018] The electric winch automatically tightens the wire rope, replacing manual pulling or carrying of the counterweight, reducing manpower input and debugging time; the fixed pulley and electric winch are quickly installed and disassembled by bolts. After the test, only the equipment needs to be removed and the bolt holes need to be repaired, avoiding the repeated loading and unloading and removal of the counterweight in the traditional method, improving test efficiency and simplifying the operation process.

[0019] The digital dynamometer displays the tension value in real time, and the displacement sensor uses laser sensing to sense the sensing plane of the upper shackle to accurately monitor the displacement deformation and ensure the measurement accuracy of the data.

[0020] The embedded parts are firmly connected to the upper floor through anchor bars, the fixed pulley is fixed to the lower floor through the mounting base, and the electric winch is connected to the shear wall through the connecting plate. The overall structure is stable and reliable and can adapt to different construction scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a partial structural schematic diagram of a fixed pulley, an electric winch, a shear wall, a connecting plate, a steel wire rope, an anti-slip rod, a guard plate, a mounting base and a clutch switch in the present invention; Figure 3 yes Figure 1 The enlarged schematic diagram of point A in the middle; Figure 4 It is a schematic diagram of the structure of the connecting plate, the sliding groove and the ear plate with holes in the present invention; Figure 5 It is a partial structural schematic diagram of the mounting base, the anti-slip U-shaped groove, the fixed pulley, the anti-slip rod and the guard plate in the present invention; In the figure: 1. Embedded parts; 2. Fixed pulley; 3. Electric winch; 4. Shear wall; 5. Connecting plate; 6. Digital dynamometer; 7. Displacement sensor; 8. Upper shackle; 9. Lower shackle; 10. Movable pulley; 11. Wire rope; 12. Hook; 13. Lifting ring; 14. Limit rod; 15. Anti-slip rod; 16. Anti-slip U-shaped groove; 17. Guard plate; 18. Clutch switch; 19. Sliding groove; 20. Ear plate with holes; 21. Mounting base. DETAILED DESCRIPTION

[0022] The present invention is specifically described and illustrated below in conjunction with embodiments.

[0023] Example 1 like Figure 1-5 As shown, the load strength test method of the lamp suspension device comprises the following steps: S1. Install fixed pulley 2 The embedded part 1 is fixedly installed on the upper floor slab, the position of the fixed pulley 2 is marked on the lower floor slab directly below the embedded part 1 and a hole is drilled, and the fixed pulley 2 is fixed to the lower floor slab by bolts; S2. Install electric winch 3 Fix the connecting plate 5 to the shear wall 4 by bolts, and fix the electric winch 3 to the connecting plate 5, so that the center of the embedded part 1, the center of the fixed pulley 2 and the center of the electric winch 3 are in the same vertical plane; S3, install digital display dynamometer 6 and displacement sensor 7 An upper shackle 8 and a lower shackle 9 are respectively provided at both ends of the digital display tensile gauge 6. The digital display tensile gauge 6 is hung on the embedded part 1 through the upper shackle 8, and the digital display tensile gauge 6 is connected to the movable pulley 10 through the lower shackle 9. Fix the displacement sensor 7 at the bottom of the upper floor slab so that the laser sensing point of the displacement sensor 7 is aligned with the top of the upper shackle 8; S4, installation of wire rope 11 The electric winch 3 is provided with a steel wire rope 11, one end of which is provided with a hook 12, and a lifting ring 13 is fixed on the top of the fixed pulley 2. The steel wire rope 11 is passed through the wheel groove of the fixed pulley 2 and the wheel groove of the movable pulley 10 in sequence, so that the hook 12 hooks the lifting ring 13; S5, horizontal traction Turn on the digital display dynamometer 6 and the displacement sensor 7, start the electric winch 3 to tighten the wire rope 11, and turn off the electric winch 3 after the tension reaches the theoretical tension value; S6. Demolition and repair The steel wire rope 11 is dismantled, the fixed pulley 2 and the electric winch 3 are removed, anti-cracking tape is pasted on the bolt holes of the lower floor slab and the shear wall 4, and grouting material is poured for maintenance.

[0024] Through the cooperation of the fixed pulley 2 and the electric winch 3, the traditional vertical counterweight loading is converted into horizontal traction loading, avoiding the safety hazard of hanging heavy objects. The measurement personnel do not need to operate directly under the embedded part 1, which improves the safety of the test; the digital display tensile gauge 6 and the displacement sensor 7 realize real-time monitoring of the tension value and accurate measurement of the displacement deformation to ensure the accuracy of the test data; the fixed pulley 2 and the electric winch 3 are quickly installed and disassembled by bolts, and only the bolt holes need to be repaired after the test, which simplifies the process and improves efficiency.

[0025] In step S1, the embedded part 1 includes an anchor bar and an embedded plate. The diameter of the anchor bar is between 14 and 20 mm. The length of the anchor bar embedded in the upper floor slab is greater than or equal to 14 to 16 times the diameter of the anchor bar. The anchor bar is provided with a hook, and the bending radius of the hook is between 45 and 55 mm. The embedded plate is disc-shaped as a whole, the thickness of the embedded plate is between 1 and 3 mm, and the diameter of the embedded plate is between 180 and 220 mm. The anchor bar is tied to the steel bars of the upper floor slab and concrete is poured to ensure a firm connection between the embedded part 1 and the upper floor slab. The hook and the embedded plate can prevent stress concentration from causing the embedded part 1 to break or fall off.

[0026] In step S1, a mounting base 21 is provided at the bottom of the fixed pulley 2, and the mounting base 21 is fixed to the lower floor slab by bolts, the wheel axle radius of the fixed pulley 2 is between 75 and 100 mm, and the distance between the bottom of the wheel groove of the fixed pulley 2 and the lower floor slab is between 100 and 150 mm. The mounting base 21 is fixed to the lower floor slab by bolts to ensure that the fixed pulley 2 stably bears the horizontal traction force of the wire rope 11 and prevents the fixed pulley 2 from tilting or shifting.

[0027] In step S2, the connecting plate 5 is arranged in a rectangular parallelepiped structure as a whole, a sliding groove 19 is arranged through the middle of the connecting plate 5, and the connecting plate 5 is provided with four perforated ear plates 20 in cooperation with the electric winch 3. The perforated ear plates 20 are bolted to the electric winch 3 to provide a stable force fulcrum and form a stable reaction force support structure.

[0028] In step S2, the electric winch 3 is fixed to the connecting plate 5 by bolts, and the distance between the bottom of the wheel shaft of the electric winch 3 and the lower floor is between 100 and 150 mm, and a clutch switch 18 is provided on the electric winch 3. The distance between the bottom of the wheel shaft of the electric winch 3 and the lower floor is equal to the distance between the bottom of the wheel groove of the fixed pulley 2 and the lower floor, ensuring that the force direction of the wire rope 11 is consistent when horizontally pulling, reducing the friction between the wire rope 11 and the wheel groove of the fixed pulley 2 due to the height difference, ensuring smooth pulling, and improving the reliability of the test; the clutch switch 18 can control the tightening and release of the wire rope 11, which is convenient for rapid locking when the theoretical tension value is reached, and improving the convenience of operation.

[0029] In step S3, a sensing plane is provided on the top of the upper end shackle 8 in cooperation with the displacement sensor 7, the distance between the displacement sensor 7 and the sensing plane is between 30 and 80 mm, and a limit rod 14 is provided on the top of the movable pulley 10 in cooperation with the wire rope 11. The sensing plane provides a flat laser reflection reference surface for the displacement sensor 7 to ensure the measurement accuracy of the displacement deformation; the limit rod 14 limits the deviation of the wire rope 11 on the movable pulley 10 to prevent the wire rope 11 from slipping out of the movable pulley 10.

[0030] In step S4, the bending diameter of the lifting ring 13 is between 45 and 55 mm, and the hook 12 is provided with an anti-slip component in cooperation with the lifting ring 13. The hook 12 and the lifting ring 13 are convenient for quick assembly and replacement on site, and the anti-slip component prevents the hook 12 and the lifting ring 13 from accidentally slipping off.

[0031] In step S4, a guard plate 17 is provided along both axial sides of the fixed pulley 2, and two anti-slip rods 15 and an anti-slip U-shaped groove 16 are fixedly provided on the guard plate 17 in cooperation with the steel wire rope 11, and the two anti-slip rods 15 are respectively provided on both radial sides of the fixed pulley 2, and the anti-slip U-shaped groove 16 is provided between the fixed pulley 2 and the mounting base 21, and the distance between the bottom of the wheel groove of the fixed pulley 2 and the anti-slip U-shaped groove 16 is less than 5 mm. The anti-slip rods 15 are located on both radial sides of the fixed pulley 2 to prevent the steel wire rope 11 from slipping out laterally; the anti-slip U-shaped groove 16 is located below the pulley to limit the steel wire rope 11 from slipping out longitudinally.

[0032] In step S5, the theoretical pulling force value is equal to five times the weight of the lamp. After the pulling force reaches the theoretical pulling force value, the electric winch 3 is turned off and left to stand for 15 minutes.

[0033] The diameter of the steel wire rope 11 is between 5 and 6 mm, and the length of the steel wire rope 11 is between 8 and 15 m.

Claims

1. A method for testing the load strength of a lamp suspension device, characterized in that: The following steps are involved: S1. Install the fixed pulley (2) The embedded component (1) is fixedly installed on the upper floor slab, the position of the fixed pulley (2) is marked on the lower floor slab directly below the embedded component (1) and a hole is drilled, and the fixed pulley (2) is fixed to the lower floor slab by bolts; S2. Install the electric winch (3) The connecting plate (5) is fixed to the shear wall (4) by bolts, and the electric winch (3) is fixed to the connecting plate (5) so that the center of the embedded part (1), the center of the fixed pulley (2) and the center of the electric winch (3) are in the same vertical plane; S3. Install the digital dynamometer (6) and displacement sensor (7) An upper shackle (8) and a lower shackle (9) are respectively provided at both ends of the digital display tensile gauge (6); the digital display tensile gauge (6) is hung on the embedded component (1) via the upper shackle (8); and the digital display tensile gauge (6) is connected to the movable pulley (10) via the lower shackle (9); A displacement sensor (7) is fixed at the bottom of the upper floor slab so that the laser sensing point of the displacement sensor (7) is aligned with the top of the upper end shackle (8); S4. Install wire rope (11) A steel wire rope (11) is provided on the electric winch (3), a hook (12) is provided at one end of the steel wire rope (11), a lifting ring (13) is fixed on the top of the fixed pulley (2), and the steel wire rope (11) is passed through the wheel groove of the fixed pulley (2) and the wheel groove of the movable pulley (10) in sequence, so that the hook (12) hooks the lifting ring (13); S5, horizontal traction Turn on the digital display dynamometer (6) and the displacement sensor (7), start the electric winch (3) to tighten the wire rope (11), and turn off the electric winch (3) after the tension reaches the theoretical tension value; S6. Demolition and repair The steel wire rope (11) is dismantled, the fixed pulley (2) and the electric winch (3) are removed, anti-cracking tape is affixed to the bolt holes of the lower floor slab and the shear wall (4), and grouting material is poured for maintenance.

2. The load strength test method for a lamp suspension device according to claim 1, characterized in that: In step S1, the embedded part (1) includes an anchor bar and an embedded plate, the diameter of the anchor bar is between 14 and 20 mm, the length of the anchor bar embedded in the upper floor slab is greater than or equal to 14 to 16 times the diameter of the anchor bar, the anchor bar is provided with a hook, and the bending radius of the hook is between 45 and 55 mm; the embedded plate is arranged in a disc shape as a whole, the thickness of the embedded plate is between 1 and 3 mm, and the diameter of the embedded plate is between 180 and 220 mm.

3. The load strength test method for a lamp suspension device according to claim 1, characterized in that: In step S1, a mounting base (21) is provided at the bottom of the fixed pulley (2), and the mounting base (21) is fixed to the lower floor slab by bolts. The radius of the wheel axle of the fixed pulley (2) is between 75 and 100 mm, and the distance between the bottom of the wheel groove of the fixed pulley (2) and the lower floor slab is between 100 and 150 mm.

4. The load strength test method for a lamp suspension device according to claim 1, characterized in that: In step S2, the connecting plate (5) is provided in a rectangular parallelepiped structure as a whole, a sliding groove (19) is provided through the middle of the connecting plate (5), and the connecting plate (5) is provided with four ear plates (20) with holes in cooperation with the electric winch (3).

5. The load strength test method for a lamp suspension device according to claim 4, characterized in that: In step S2, the electric winch (3) is fixed to the connecting plate (5) by means of bolts, the distance between the bottom of the axle of the electric winch (3) and the lower floor slab is between 100 and 150 mm, and a clutch switch (18) is provided on the electric winch (3).

6. The load strength test method for a lamp suspension device according to claim 1, characterized in that: In step S3, a sensing plane is provided on the top of the upper end shackle (8) in cooperation with the displacement sensor (7), the distance between the displacement sensor (7) and the sensing plane is between 30 and 80 mm, and a limit rod (14) is provided on the top of the movable pulley (10) in cooperation with the wire rope (11).

7. The load strength test method for a lamp suspension device according to claim 1, characterized in that: In step S4, the bending diameter of the lifting ring (13) is between 45 and 55 mm, and the hook (12) is provided with an anti-dropping member in cooperation with the lifting ring (13).

8. The load strength test method for a lamp suspension device according to claim 3, characterized in that: In step S4, guard plates (17) are arranged along both axial sides of the fixed pulley (2), and two anti-slip rods (15) and an anti-slip U-shaped groove (16) are fixedly arranged on the guard plate (17) in cooperation with the steel wire rope (11). The two anti-slip rods (15) are arranged on both radial sides of the fixed pulley (2), respectively, and the anti-slip U-shaped groove (16) is arranged between the fixed pulley (2) and the mounting base (21), and the distance between the bottom of the wheel groove of the fixed pulley (2) and the anti-slip U-shaped groove (16) is less than 5 mm.

9. The load strength test method for a lamp suspension device according to claim 1, characterized in that: In step S5, the theoretical pulling force value is equal to five times the weight of the lamp. After the pulling force reaches the theoretical pulling force value, the electric winch (3) is turned off and left to stand for 15 minutes.

10. The load strength test method of a lamp suspension device according to claim 1, characterized in that: The diameter of the steel wire rope (11) is between 5 and 6 mm, and the length of the steel wire rope (11) is between 8 and 15 m.

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