Bearing pressure detection equipment for high-altitude hanging basket

Abstract

The invention relates to the technical field of pressure detection, and discloses a bearing pressure detection device for a high-altitude hanging basket, and the device comprises a hanging basket unit which comprises a pedestal, a supporting assembly disposed at the top of the pedestal, and a hanging basket body disposed in the supporting assembly. And the detection unit comprises a sensing assembly arranged at the top of the base, a limiting assembly arranged at the top of the supporting assembly and an alarm assembly arranged on the outer side of the limiting assembly. According to the bearing pressure detection equipment of the high-altitude hanging basket, a load is vertically transmitted to the detection plate through the hanging basket body, the first piston is driven to compress the first spring, and hydraulic oil is quantitatively pressed into the relay tank synchronously, so that pure mechanical bearing detection is realized; the detection plate is pressed down through the load of the hanging basket to drive the first piston to compress the first spring, hydraulic oil is pushed to the first oil cylinder, the second piston is pushed to drive the adjusting wedge block to move downwards to drive the movable wedge block and the brake shoe to implement progressive brake on the cable, and the hanging basket is prevented from continuing to lift off in the overload state.

Description

Technical Field

[0001] This invention relates to the field of pressure testing technology, specifically to a load-bearing pressure testing device for a suspended platform. Background Technology

[0002] Aerial work platforms are suspended work platforms that move vertically along building facades or tall structures, driven by winches or climbing hoists. They are widely used in scenarios such as building curtain wall installation, thermal insulation coating application, large tank or chimney maintenance, wind turbine maintenance, and bridge cable inspection. Their standard load is usually 200 kg to 800 kg. On a daily basis, they need to support two operators and hand tools, some decorative materials, small electromechanical equipment or maintenance spare parts at the same time. In some industrial maintenance situations, they also need to temporarily store concentrated heavy goods such as metal components, pipe sections or paint buckets.

[0003] However, existing aerial work platforms rely heavily on electronically controlled weighing sensors or simple mechanical limit switches for load testing. These sensors are prone to drift, false alarms, or failure in outdoor high humidity, dust, and electromagnetic interference environments. Mechanical switches can only provide limit position alarms and cannot actively intervene in the early stages of overload. When operators pile up goods to reduce the number of trips or mistakenly place heavy equipment into the platform at once, local overload is very likely to occur. Overload will lead to an increase in braking distance and a decrease in the friction coefficient between the wire rope and the winch, causing slippage or even top collision accidents. Continuous overload will also cause plastic deformation of the platform's steel structure, reduce the overall lifespan of the machine, and may trigger gear breakage or wire rope breakage, resulting in serious consequences of falling from a height. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a load-bearing pressure detection device for aerial suspended platforms. This solves the problem that existing aerial suspended platform load-bearing detection relies mainly on electronically controlled weighing sensors or simple mechanical limit switches. These sensors are prone to drift, false alarms, or failures in outdoor high humidity, dust, and electromagnetic interference environments, while mechanical switches can only provide limit position alarms and cannot actively intervene in the early stages of overload.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a load-bearing pressure testing device for a high-altitude suspended platform, comprising a suspended platform unit, including a base, a support component disposed on the top of the base, and a suspended platform body disposed inside the support component; The detection unit includes a sensing component disposed on the top of the base, a limiting component disposed on the top of the support component, and an alarm component disposed on the outside of the limiting component; The sensing component includes two sets of fixing brackets disposed on the top of the base. An oil storage tank is fixedly disposed inside each of the two sets of fixing brackets. A first piston is slidably disposed inside the two sets of oil storage tanks. The top of the two sets of first pistons extends through and above the oil storage tank and is fixedly disposed with a detection plate. A first spring is disposed between the detection plate and the side of the oil storage tank that is close to each other. A pusher is disposed at the bottom of the oil storage tank. The limiting component includes a lifting member disposed on the top of the support component and a brake member disposed on the outside of the lifting member.

[0006] Preferably, the side of each of the two sets of detection plates away from the first piston is connected to the bottom of the basket body, the two sets of first pistons are respectively located inside the two sets of first springs, and two sets of auxiliary springs are provided between the detection plates and the base on the side that are close to each other.

[0007] Preferably, the support assembly includes two sets of support frames fixedly disposed on the top of the base, and two sets of sliding grooves are provided on the side of the two sets of support frames that are close to each other. Two sets of sliding seats are fixedly disposed on the left and right sides of the suspended basket body, and the four sets of sliding seats are slidably connected to the four sets of sliding grooves respectively.

[0008] Preferably, the pushing component includes a first oil pipe respectively connected to the bottom of the two sets of oil storage tanks, a relay tank connected to the end of each of the two sets of first oil pipes away from the oil storage tanks, and a second oil pipe connected to the top of each of the two sets of relay tanks.

[0009] Preferably, a stabilizing frame is fixedly installed inside each of the two sets of supporting frames, and the two sets of relay tanks are respectively embedded inside the two sets of stabilizing frames. The diameter of the relay tank is larger than the diameter of the first oil pipe and the second oil pipe.

[0010] Preferably, the lifting component includes pulley frames respectively disposed on the top of the two sets of support frames, each set of pulley frames having a lifting pulley rotatably disposed inside, and each set of lifting pulleys having a cable wound inside.

[0011] Preferably, the brake assembly includes a connecting frame fixedly disposed on the outer side of the two sets of pulley frames. Limiting frames are fixedly disposed on the inner walls of the front and rear sides of the connecting frame. Movable wedges are slidably disposed inside the limiting frames on both the front and rear sides. Push plates are fixedly disposed on the side of the movable wedges on both the front and rear sides that are close to each other. Brake shoes are fixedly disposed on the side of the push plates on both the front and rear sides that are close to each other. The brake shoes on the front and rear sides are respectively disposed on the front and rear sides of the cable.

[0012] Preferably, the brake assembly further includes two sets of upright plates fixedly disposed on the top of the connecting frame. A first oil cylinder is fixedly disposed on one side of the upright plates on both the front and rear sides that are close to each other. A second piston is slidably disposed inside the first oil cylinder. An adjusting wedge is fixedly disposed at the bottom end of the second piston. A second spring is sleeved on the outside of the second piston. A bridging oil pipe is connected to the outside of the first oil cylinder on both the front and rear sides. The bridging oil pipe is connected to the top end of the second oil pipe.

[0013] Preferably, the alarm assembly includes a combination frame fixedly disposed on the outside of the two sets of connecting frames, an alarm fixedly disposed on the outside of each of the two sets of combination frames, a fixed contact fixedly disposed on the inner wall of each of the two sets of combination frames near the alarm, the two sets of fixed contacts being electrically connected to the two sets of alarms respectively, a second oil cylinder disposed on the side of each of the two sets of combination frames away from the alarm, a third piston slidably disposed inside each of the two sets of second oil cylinders, and a conductive contact fixedly disposed at the output end of each of the two sets of third pistons.

[0014] Preferably, the two sets of conductive contacts are located inside the two sets of combined frames, and the positions of the two sets of conductive contacts correspond to the positions of the two sets of fixed contacts. The ends of the two sets of second oil cylinders away from the combined frame are connected to branch pipes, and the two sets of branch pipes are connected to the outer sides of the two sets of second oil pipes.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a load-bearing pressure testing device for high-altitude suspended platforms, which has the following beneficial effects: 1. The load-bearing pressure testing equipment of this aerial work platform vertically transmits the load to the testing plate through the platform body, drives the first piston to compress the first spring and simultaneously pressurizes hydraulic oil into the relay tank in a metered manner, realizing a purely mechanical load-bearing test. The output oil pressure increases linearly with the load. The load of the platform presses down on the testing plate, driving the first piston to compress the first spring, pushing the hydraulic oil meteredly to the first oil cylinder, pushing the second piston to drive the adjusting wedge to move downward, and then driving the moving wedge and brake shoe to gradually brake the cable. The greater the overload, the stronger the clamping force, which can form a reliable mechanical limit in the early stage of lifting, completely blocking the path of the platform to continue to rise under overload conditions, fundamentally avoiding safety risks such as extended braking distance, wire rope slippage or rope breakage and fall, and significantly improving the load-bearing safety and structural reliability of the aerial work platform.

[0016] 2. The load-bearing pressure detection equipment and alarm components of this aerial work platform are driven by the same hydraulic source. While the oil flows to the brake component, it enters the second oil cylinder through the branch pipe, pushing the third piston to close the conducting contact and the fixed contact, triggering the alarm to emit an audible and visual alarm, realizing an immediate reminder of the overload condition, which makes it convenient for operators to unload or suspend the operation in time. Secondly, the alarm component, load-bearing detection and brake structure share the same hydraulic drive source, which does not require additional electrical control components. It has the advantages of rapid response, strong anti-interference ability and simple maintenance, which effectively improves the environmental adaptability and ease of use of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the load-bearing pressure testing device for a high-altitude suspended platform proposed in this invention. Figure 2 This is a cross-sectional schematic diagram of a load-bearing pressure testing device for a high-altitude suspended platform proposed in this invention. Figure 3 This is a schematic diagram showing the connection between the detection unit and the support component of the load-bearing pressure detection device for a high-altitude suspended platform proposed in this invention. Figure 4 This is a schematic diagram of the detection unit structure of a load-bearing pressure detection device for a high-altitude suspended platform proposed in this invention; Figure 5 This is a partial structural cross-sectional view of the detection unit of a load-bearing pressure detection device for a high-altitude suspended platform proposed in this invention. Figure 6 This is a schematic diagram of the limiting component structure of a load-bearing pressure detection device for a high-altitude suspended platform proposed in this invention; Figure 7 This is a schematic diagram from another perspective of the limiting component structure of the load-bearing pressure detection device for a high-altitude suspended platform proposed in this invention; Figure 8 This is a rear view of the limiting component of a load-bearing pressure detection device for a suspended platform according to the present invention. Figure 9 This is a cross-sectional schematic diagram of the limiting component structure of a load-bearing pressure detection device for a high-altitude suspended platform proposed in this invention; Figure 10 This invention proposes a load-bearing pressure testing device for a suspended platform. Figure 9 Enlarged schematic diagram of the structure at point A in the middle; Figure 11 This invention proposes a load-bearing pressure testing device for a suspended platform. Figure 9 Enlarged schematic diagram of the structure at point B; Figure 12 This is a schematic diagram of the brake component structure of a load-bearing pressure testing device for a high-altitude suspended platform proposed in this invention.

[0018] In the diagram: 1. Suspended basket unit; 11. Base; 12. Support assembly; 121. Support frame; 122. Slide groove; 123. Sliding seat; 13. Suspended basket body; 2. Detection unit; 21. Sensing assembly; 211. Fixing frame; 212. Oil storage tank; 213. First piston; 214. Detection plate; 215. First spring; 216. Pushing component; 2161. First oil pipe; 2162. Relay tank; 2163. Second oil pipe; 2164. Stabilizer; 217. Auxiliary spring; 22. Limiting assembly; 221. Lifting component; 2211. Pulley frame; 22 12. Lifting pulley; 2213. Cable; 222. Brake assembly; 2221. Connecting frame; 2222. Limiting frame; 2223. Moving wedge; 2224. Push plate; 2225. Brake shoe; 2226. Vertical plate; 2227. First oil cylinder; 2228. Second piston; 2229. Adjusting wedge; 22210. Second spring; 22211. Bridging oil pipe; 23. Alarm assembly; 231. Combination frame; 232. Alarm; 233. Fixed contact; 234. Second oil cylinder; 235. Third piston; 236. Conducting contact; 237. Branch pipe. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-12 A load-bearing pressure testing device for a high-altitude suspended platform includes a suspended platform unit 1, a base 11, a support component 12 disposed on the top of the base 11, and a suspended platform body 13 disposed inside the support component 12.

[0021] In this embodiment, the detection unit 2 includes a sensing component 21 disposed on the top of the base 11, a limiting component 22 disposed on the top of the support component 12, and an alarm component 23 disposed outside the limiting component 22. The sensing component 21 includes two sets of fixing brackets 211 disposed on the top of the base 11. An oil storage tank 212 is fixedly disposed inside each of the two sets of fixing brackets 211. A first piston 213 is slidably disposed inside the two sets of oil storage tanks 212. The top of the two sets of first pistons 213 penetrates through and extends to the top of the oil storage tank 212 and a detection plate 214 is fixedly disposed thereon. A first spring 215 is disposed between the detection plate 214 and the side of the oil storage tank 212 that is close to each other. A pusher 216 is disposed at the bottom of the oil storage tank 212.

[0022] Furthermore, the limiting component 22 includes a lifting member 221 disposed on the top of the support component 12 and a brake member 222 disposed on the outside of the lifting member 221. The side of the two sets of detection plates 214 away from the first piston 213 is connected to the bottom of the basket body 13. The two sets of first pistons 213 are respectively located inside the two sets of first springs 215. Two sets of auxiliary springs 217 are disposed between the sides of the detection plates 214 and the base 11 that are close to each other.

[0023] It should be noted that, for reference Figure 1-2 When goods are placed inside the basket body 13, the first spring 215 and the auxiliary spring 217 work together to provide a spring force that is the safe load capacity that the basket body 13 can bear.

[0024] Furthermore, the support assembly 12 includes two sets of support frames 121 fixedly installed on the top of the base 11. Two sets of sliding grooves 122 are provided on the side of the two sets of support frames 121 that are close to each other. Two sets of sliding seats 123 are fixedly installed on the left and right sides of the suspended basket body 13 respectively. The four sets of sliding seats 123 are slidably connected to the four sets of sliding grooves 122 respectively.

[0025] Furthermore, the pusher 216 includes a first oil pipe 2161 respectively connected to the bottom of the two sets of oil storage tanks 212, and a relay tank 2162 connected to the end of each of the two sets of first oil pipes 2161 away from the oil storage tanks 212. A second oil pipe 2163 is connected to the top of each of the two sets of relay tanks 2162.

[0026] For details, please refer to Figure 3-5 When the basket body 13 bears an overload, it transmits its vertical force to the detection plate 214. When the total weight of the basket body 13 plus the cargo is greater than the elastic force of the first spring 215 and the auxiliary spring 217, the detection plate 214 moves downward synchronously and compresses the first spring 215 and the auxiliary spring 217, causing the first piston 213 to slide downward in the oil storage tank 212 in a sealed manner, and presses the hydraulic oil in the tank into the relay tank 2162 through the first oil pipe 2161.

[0027] Furthermore, a stabilizing frame 2164 is fixedly installed inside each of the two sets of supporting frames 121, and two sets of relay tanks 2162 are respectively embedded inside the two sets of stabilizing frames 2164. The diameter of the relay tank 2162 is larger than the diameter of the first oil pipe 2161 and the second oil pipe 2163.

[0028] It should be noted that the cross-sectional area of ​​the relay tank 2162 is more than five times the sum of the cross-sectional areas of the first oil pipe 2161 and the second oil pipe 2163. When the basket body 13 is under normal load, the oil pumped out by the first piston 213 first fills the relay tank 2162. The liquid level in the tank rises, but the internal pressure has not yet reached the opening pressure of the second oil pipe 2163. The hydraulic oil will not continue to be transmitted upward, so it will not trigger the brake component 222 and the alarm component 23, thus avoiding misjudgment caused by the compression of the first spring 215 under normal load. Only when the load continues to increase to approach the overload limit, the relay tank 2162 is filled, and the liquid level continues to rise, causing the internal pressure to exceed the set threshold. Only then will the hydraulic oil be output to the first oil cylinder 2227 and the second oil cylinder 234 simultaneously through the second oil pipe 2163. This ensures that braking and alarm are activated only under true overload conditions, realizing dual-condition judgment of volume and pressure, and improving detection accuracy.

[0029] It should also be noted that, see reference Figure 3 The stabilizer 2164 secures the relay tank 2162 to prevent pipeline vibration caused by high-pressure oil pulses.

[0030] In this embodiment, the lifting component 221 includes pulley frames 2211 respectively disposed on the top of two sets of support frames 121. Lifting pulleys 2212 are rotatably disposed inside the two sets of pulley frames 2211, and cables 2213 are wound inside the two sets of lifting pulleys 2212.

[0031] It should be noted that, for reference Figure 2-3 During the lifting process, the sliding seat 123 is guided up and down along the slide groove 122 of the support frame 121 to ensure that the basket body 13 only generates vertical displacement and does not generate off-center load.

[0032] Specifically, the lifting and lowering of the suspended platform body 13 is driven by the lifting component 221. The lifting component 221 includes a pulley frame 2211 set on the top of the support frame 121. A lifting pulley 2212 is rotatably arranged inside the pulley frame 2211. A cable 2213 is wound on the lifting pulley 2212. The two ends of the cable 2213 are respectively connected to the external hoisting mechanism or the climbing hoist for winding and unwinding. When the external hoist winds up or unwinds the cable 2213, the cable 2213 drives the lifting pulley 2212 to rotate synchronously, thereby pulling the support frame 121 and the base 11 to move through the pulley system. The support frame 121 and the base 11 drive the suspended platform body 13 to lift and lower synchronously.

[0033] Furthermore, the brake clamp 222 includes a connecting frame 2221 fixedly installed on the outside of the two sets of pulley frames 2211. Limiting frames 2222 are fixedly installed on the inner walls of the front and rear sides of the connecting frame 2221. Moving wedges 2223 are slidably installed inside the limiting frames 2222 on both sides. Push plates 2224 are fixedly installed on the side of the moving wedges 2223 on both sides that are close to each other. Brake shoes 2225 are fixedly installed on the side of the push plates 2224 on both sides that are close to each other. The brake shoes 2225 on both sides are respectively installed on the front and rear sides of the cable 2213.

[0034] For details, please refer to Figure 4-12 After the relay tank 2162 stabilizes and stores the oil pressure, the hydraulic oil, which is linearly proportional to the load, is sent to the first oil cylinder 2227 through the second oil pipe 2163. Then, the oil pressure pushes the second piston 2228 to move downward against the second spring 22210. The adjusting wedge 2229 fixed at the end of the second piston 2228 moves downward synchronously. Its wedge surface squeezes the moving wedge 2223 to slide inward along the limit frame 2222. The push plate 2224 drives the brake shoe 2225 to hug the cable 2213 on the lifting pulley 2212. The greater the overload, the greater the wedge force, thus forming a reliable mechanical limit in the initial stage of lifting and preventing the basket from continuing to rise.

[0035] It should be noted that the brake shoe 2225 is made of high wear-resistant and high-temperature resistant powder metallurgy friction material. Under overload conditions, the second piston 2228 is driven by hydraulic pressure to move the adjusting wedge 2229 downward. Its wedge surface acts on the moving wedge 2223, causing the moving wedge 2223 to slide inward along the limit frame 2222. The push plate 2224 fixed to the moving wedge 2223 simultaneously pushes the brake shoe 2225 to move towards the cable 2213. The front and rear brake shoes 2225 hug the cable 2213 in a symmetrical manner, generating a friction braking torque through controllable radial positive pressure. This braking torque increases linearly with the hydraulic oil pressure, forming a progressive braking that is proportional to the overload amplitude. Thus, mechanical limiting can be achieved in the initial stage of lifting, preventing the basket from continuing to rise.

[0036] Secondly, the brake clamp 222 also includes two sets of upright plates 2226 fixedly installed on the top of the connecting frame 2221. A first oil cylinder 2227 is fixedly installed on the side of the front and rear upright plates 2226 that are close to each other. A second piston 2228 is slidably installed inside the first oil cylinder 2227. An adjusting wedge block 2229 is fixedly installed at the bottom end of the second piston 2228. A second spring 22210 is sleeved on the outside of the second piston 2228. A bridging oil pipe 22211 is connected to the outside of the front and rear first oil cylinders 2227. The bridging oil pipe 22211 is connected to the top end of the second oil pipe 2163.

[0037] In this embodiment, the alarm component 23 includes a combination frame 231 fixedly disposed on the outside of the two sets of connecting frames 2221. An alarm 232 is fixedly disposed on the outside of each of the two sets of combination frames 231. A fixed contact 233 is fixedly disposed on the inner wall of each of the two sets of combination frames 231 near the alarm 232. The two sets of fixed contacts 233 are electrically connected to the two sets of alarms 232 respectively. A second oil cylinder 234 is disposed on the side of each of the two sets of combination frames 231 away from the alarm 232. A third piston 235 is slidably disposed inside each of the two sets of second oil cylinders 234. A conduction contact 236 is fixedly disposed at the output end of each of the two sets of third pistons 235.

[0038] It should be noted that the alarm 232 is fixed to the outside of the combination frame 231. One end of its power circuit is electrically connected to the fixed contact 233, and the other end is connected to the external 24 V DC safety power supply and the main controller via a wire. When hydraulic oil enters the second oil cylinder 234 through the branch pipe 237 and pushes the third piston 235, the conducting contact 236 moves synchronously with the piston rod and presses and closes with the fixed contact 233, making the alarm 232 circuit instantaneously connected and immediately issuing an audible and visual alarm signal to prompt the operator to unload or stop the machine. After the overload is eliminated, the hydraulic pressure drops, the third piston 235 retracts under the action of the return spring, the contact opens, and the alarm stops automatically. Both the fixed contact 233 and the conducting contact 236 are made of silver-nickel alloy and riveted to a copper-based conductive sheet to prevent oxidation in open-air high humidity and salt spray environments, ensuring long-term reliable switching in low-frequency, low-current alarm circuits.

[0039] Furthermore, the two sets of conductive contacts 236 are located inside the two sets of assembly frames 231, and the positions of the two sets of conductive contacts 236 correspond to the positions of the two sets of fixed contacts 233. The ends of the two sets of second oil cylinders 234 away from the assembly frame 231 are connected to branch pipes 237, and the two sets of branch pipes 237 are connected to the outer sides of the two sets of second oil pipes 2163.

[0040] For details, please refer to Figure 7-8 At the same time, the second oil pipe 2163 delivers hydraulic oil that is linearly proportional to the load to the first oil cylinder 2227. Simultaneously, the oil pressure energy enters the second oil cylinder 234 through the branch pipe 237 and pushes the third piston 235 to move inward, causing the conducting contact 236 to move and close with the fixed contact 233 in the combination frame 231, connecting the alarm circuit 232 and immediately issuing an audible and visual alarm signal to prompt the operator to unload or stop the machine.

[0041] Furthermore, when the load drops below the rated value, the overall weight of the basket body 13 plus the cargo is less than the elastic force of the first spring 215 and the auxiliary spring 217. The first spring 215 and the auxiliary spring 217 rebound together, each piston resets, and the negative pressure suction generated when the pistons reset will draw the ejected hydraulic oil back into the oil storage tank 212. The brake shoe 2225, which loses the push of the oil pressure, releases the cable 2213, the contact is disconnected, the alarm stops, and the equipment automatically returns to the ready-to-lift state.

[0042] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that provides control.

[0043] Working principle: When goods are placed inside the suspended basket body 13, the first spring 215 and the auxiliary spring 217 work together, and the elastic force they provide is the safe load capacity that the suspended basket body 13 can bear. When the suspended basket body 13 bears an overload, its vertical force is transmitted to the detection plate 214. When the total weight of the suspended basket body 13 plus the goods exceeds the elastic force of the first spring 215 and the auxiliary spring 217, the detection plate 214 moves downward synchronously and compresses the first spring 215 and the auxiliary spring 217, causing the first piston 213 to slide downward in a sealed manner within the oil storage tank 212, and pressurizing the hydraulic oil in the tank into the relay tank through the first oil pipe 2161. 2162; After the relay tank 2162 stabilizes and stores the oil pressure, the hydraulic oil, which is linearly proportional to the load, is sent to the first oil cylinder 2227 through the second oil pipe 2163. Then, the oil pressure pushes the second piston 2228 to move downward against the second spring 22210. The adjusting wedge 2229 fixed at the end of the second piston 2228 moves downward synchronously. Its wedge surface squeezes the moving wedge 2223 to slide inward along the limit frame 2222. The push plate 2224 drives the brake shoe 2225 to hug the cable 2213 on the lifting pulley 2212. The greater the overload, the greater the wedge force, thus forming a reliable mechanical limit in the initial stage of lifting and preventing the basket from continuing to rise.

[0044] Secondly, while the second oil pipe 2163 delivers hydraulic oil that is linearly proportional to the load to the first oil cylinder 2227, the oil pressure can enter the second oil cylinder 234 through the branch pipe 237 and push the third piston 235 to move inward, causing the conducting contact 236 to move and close with the fixed contact 233 in the combination frame 231, connecting the alarm circuit 232 and immediately issuing an audible and visual alarm signal to prompt the operator to unload or stop the machine.

[0045] When the load drops below the rated value, the overall weight of the basket body 13 plus the cargo is less than the elastic force of the first spring 215 and the auxiliary spring 217. The first spring 215 and the auxiliary spring 217 rebound together, the pistons reset, and the negative pressure suction generated when the pistons reset will draw the ejected hydraulic oil back into the oil storage tank 212. The brake shoe 2225, which loses the push of the oil pressure, releases the cable 2213, the contact is disconnected, the alarm stops, and the equipment automatically returns to the ready-to-lift state. Throughout the process, the sliding seat 123 guides up and down along the slide groove 122 of the support frame 121 to ensure that the basket body 13 only produces vertical displacement and does not have an off-center load. The stabilizer 2164 fixes the relay tank 2162 to prevent the pipeline from shaking due to high pressure oil pulses.

[0046] In summary, the load-bearing pressure detection equipment for this aerial work platform converts the load on the platform body 13 into a real-time hydraulic signal through a mechanical and hydraulic transmission path via the detection plate 214, the first piston 213, the oil storage tank 212, the relay tank 2162, and the second oil pipe 2163. This achieves linear load-bearing detection without electrical components, completely avoiding drift, false alarms, or failures caused by high humidity, dust, and electromagnetic interference. The hydraulic pressure directly drives the second piston 2228 in the first oil cylinder 2227 to the adjusting wedge 2229, the moving wedge 2223, and then to the brake shoe 2225, forming a sequence. The progressive braking force, proportional to the overload amplitude, reliably mechanically limits the cable 2213 at the initial lifting stage, preventing further overload and eliminating the risks of extended braking distance, wire rope slippage, and rope breakage leading to falls. Furthermore, the same hydraulic pressure enters the second oil cylinder 234 through the branch pipe 237, pushing the third piston 235 to close the conducting contact 236 and the fixed contact 233, triggering the alarm 232 to simultaneously sound and light an alarm, prompting timely unloading. This requires no modification to the existing hoisting mechanism, is compact, maintenance-free, has a long service life, strong environmental adaptability, and low modification costs, making it easy to promote on a large scale.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A load-bearing pressure testing device for a suspended platform, characterized in that: include, The suspended basket unit (1) includes a base (11), a support assembly (12) disposed on the top of the base (11), and a suspended basket body (13) disposed inside the support assembly (12). The detection unit (2) includes a sensing component (21) disposed on the top of the base (11), a limiting component (22) disposed on the top of the support component (12), and an alarm component (23) disposed on the outside of the limiting component (22). The sensing component (21) includes two sets of fixing brackets (211) disposed on the top of the base (11). An oil storage tank (212) is fixedly disposed inside each of the two sets of fixing brackets (211). A first piston (213) is slidably disposed inside the two sets of oil storage tanks (212). The top of the two sets of first pistons (213) extends through and above the oil storage tank (212) and a detection plate (214) is fixedly disposed thereon. A first spring (215) is disposed between the detection plate (214) and the side of the oil storage tank (212) that is close to each other. A pusher (216) is disposed at the bottom of the oil storage tank (212). The limiting component (22) includes a lifting member (221) disposed on the top of the support component (12) and a brake member (222) disposed on the outside of the lifting member (221).

2. The load-bearing pressure testing device for a suspended platform according to claim 1, characterized in that: The side of each of the two sets of detection plates (214) away from the first piston (213) is connected to the bottom of the basket body (13). The two sets of first pistons (213) are located inside the two sets of first springs (215). Two sets of auxiliary springs (217) are provided between the detection plates (214) and the base (11) on the side that are close to each other.

3. The load-bearing pressure testing device for a suspended platform according to claim 2, characterized in that: The support assembly (12) includes two sets of support frames (121) fixedly installed on the top of the base (11). Two sets of sliding grooves (122) are provided on the side of the two sets of support frames (121) that are close to each other. Two sets of sliding seats (123) are fixedly installed on the left and right sides of the suspended basket body (13). The four sets of sliding seats (123) are slidably connected to the four sets of sliding grooves (122).

4. The load-bearing pressure testing device for a suspended platform according to claim 3, characterized in that: The pusher (216) includes a first oil pipe (2161) that is respectively connected to the bottom of the two sets of oil storage tanks (212). The end of each of the two sets of first oil pipes (2161) away from the oil storage tank (212) is connected to a relay tank (2162). The top of each of the two sets of relay tanks (2162) is connected to a second oil pipe (2163).

5. The load-bearing pressure testing device for a suspended platform according to claim 4, characterized in that: Both sets of support frames (121) are fixedly equipped with stabilizers (2164), and the two sets of relay tanks (2162) are respectively embedded in the two sets of stabilizers (2164). The diameter of the relay tank (2162) is larger than the diameter of the first oil pipe (2161) and the second oil pipe (2163).

6. The load-bearing pressure testing device for a suspended platform according to claim 5, characterized in that: The lifting component (221) includes pulley frames (2211) respectively disposed on the top of the two sets of support frames (121). Lifting pulleys (2212) are rotatably disposed inside the two sets of pulley frames (2211), and cables (2213) are wound inside the two sets of lifting pulleys (2212).

7. The load-bearing pressure testing device for a suspended platform according to claim 6, characterized in that: The brake clamp (222) includes a connecting frame (2221) fixedly installed on the outside of the two sets of pulley frames (2211). Limiting frames (2222) are fixedly installed on the inner walls of the front and rear sides of the connecting frame (2221). Moving wedges (2223) are slidably installed inside the limiting frames (2222) on both the front and rear sides. Push plates (2224) are fixedly installed on the side of the moving wedges (2223) on both the front and rear sides that are close to each other. Brake shoes (2225) are fixedly installed on the side of the push plates (2224) on both the front and rear sides that are close to each other. The brake shoes (2225) on the front and rear sides are respectively located on the front and rear sides of the cable (2213).

8. The load-bearing pressure testing device for a suspended platform according to claim 7, characterized in that: The brake clamp (222) also includes two sets of upright plates (2226) fixedly installed on the top of the connecting frame (2221). A first oil cylinder (2227) is fixedly installed on the side of the upright plates (2226) that are close to each other on the front and rear sides. A second piston (2228) is slidably installed inside the first oil cylinder (2227). An adjusting wedge (2229) is fixedly installed at the bottom end of the second piston (2228). A second spring (22210) is sleeved on the outside of the second piston (2228). A bridging oil pipe (22211) is connected to the outside of the first oil cylinder (2227) on the front and rear sides. The bridging oil pipe (22211) is connected to the top end of the second oil pipe (2163).

9. The load-bearing pressure testing device for a suspended platform according to claim 8, characterized in that: The alarm assembly (23) includes a combination frame (231) fixedly disposed on the outside of the two sets of connecting frames (2221). An alarm (232) is fixedly disposed on the outside of the two sets of combination frames (231). A fixed contact (233) is fixedly disposed on the inner wall of the side of the two sets of combination frames (231) close to the alarm (232). The two sets of fixed contacts (233) are electrically connected to the two sets of alarms (232). A second oil cylinder (234) is disposed on the side of the two sets of combination frames (231) away from the alarm (232). A third piston (235) is slidably disposed inside the two sets of second oil cylinders (234). A conduction contact (236) is fixedly disposed at the output end of the two sets of third pistons (235).

10. The load-bearing pressure testing device for a suspended platform according to claim 9, characterized in that: The two sets of conductive contacts (236) are located inside the two sets of combined frames (231), and the two sets of conductive contacts (236) correspond to the positions of the two sets of fixed contacts (233). The two sets of second oil cylinders (234) are connected to a branch pipe (237) at the end away from the combined frame (231), and the two sets of branch pipes (237) are connected to the outside of the two sets of second oil pipes (2163).

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