Anti-falling early warning steel strand
By installing elastic sleeves and embedding tension detection devices on the steel strands to prevent falls and provide early warning, the problem of uneven force caused by unstable center of gravity during hoisting is solved, enabling real-time alarms and adjustments, and ensuring hoisting safety and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG NO 2 CONSTR ENG CO LTD
- Filing Date
- 2025-06-21
- Publication Date
- 2026-07-21
AI Technical Summary
In building construction, the center of gravity of complex structural components is difficult to calculate accurately, which leads to uneven stress on the steel strands, making them prone to tilting, falling and breaking, affecting safety and construction costs.
Fall protection warning steel strands are used. By installing elastic sleeves on the steel strands and embedding tension detection devices, tension differences are detected in real time and alarms are issued through alarm devices to adjust the hoisting position in a timely manner.
This effectively prevents steel structures from falling and tilting during hoisting, improving safety and construction accuracy, and reducing adjustment difficulty and cost.
Smart Images
Figure CN224530409U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, and in particular to a fall-prevention early warning steel strand. Background Technology
[0002] In the construction industry, steel strands have become core load-bearing components for hoisting large structural members due to their high strength and toughness. However, as the structures of the objects being hoisted become increasingly complex and their shapes increasingly irregular, the problem of uneven stress on the steel strands caused by the difficulty in accurately determining the center of gravity of the object has become increasingly prominent.
[0003] In existing technologies, when hoisting complex structural components, the differences in the internal structure and uneven mass distribution of the object being hoisted, as well as potential asymmetry or irregular shapes, make it difficult to accurately calculate and predict its center of gravity. For example, in the hoisting of components such as bridge steel box girders and large building domes, even theoretical center of gravity calculations based on prior design drawings are insufficient to account for the impact of actual manufacturing errors and installation deviations of auxiliary equipment. During actual hoisting operations, because the center of gravity deviates from the preset position, the stress at the connection points between the steel strands and the object being hoisted does not match expectations, leading to significant differences in the tensile force borne by each steel strand.
[0004] In addition, for ease of hoisting, some large components need to be disassembled before being bundled and hoisted, which can easily cause the hoisting point to deviate from the center of gravity.
[0005] This uneven force caused by deviation in the center of gravity can easily lead to tilting during hoisting, potentially causing the hoisted object to fall, or even causing the steel strands to break due to excessive local load, seriously threatening hoisting safety. At the same time, uneven force can cause the hoisted object to tilt and sway during hoisting, which can also affect the accuracy of subsequent installation, increasing the difficulty of adjustment and construction costs. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a fall-prevention warning steel strand. This fall-prevention warning steel strand can issue a timely warning when the steel strand is subjected to uneven force or excessive tension during the hoisting process of various steel structures, so as to avoid the steel structure from falling.
[0007] To solve the above technical problems, the following technical solution is adopted:
[0008] A fall protection warning steel strand includes at least two steel strand bodies, characterized in that: each of the steel strand bodies is fitted with an elastic sleeve; it also includes an alarm device and at least two tension detection devices, the number of tension detection devices being the same as the number of elastic sleeves and corresponding one-to-one, the tension detection devices being embedded in the corresponding elastic sleeves; the signal output end of the tension detection device is communicatively connected to the signal input end of the alarm device.
[0009] In the aforementioned fall protection warning steel strand, when used for lifting equipment, multiple steel strand bodies can be used simultaneously. One end of each steel strand body is connected to various points on the object being lifted (depending on the shape of the object, two-point, three-point, or four-point lifting can be used, in which case the number of steel strand bodies is two, three, or four, respectively). The other end of the steel strand body is connected to the hook of the lifting equipment. The lifting equipment lifts the object through each steel strand body, and as the object is about to... When lifted off the ground, each steel strand and its elastic sleeve are simultaneously taut, and the tension on each strand and sleeve is the same. At this point, each tension detection device can detect the tension on the sleeve and send the current tension value to the alarm device. The alarm device compares these values, and if the tension difference exceeds a threshold, it sounds an alarm, indicating uneven stress on the steel strands. This suggests the object being lifted is prone to tilting and falling during hoisting, requiring a change in the binding position of the steel strands. In this application, the fall-prevention warning steel strand can detect instability or excessive lateral tilting of the hoisting operation as the object is about to leave the ground, allowing for immediate adjustment of the binding position and preventing the object from tilting and falling after lifting.
[0010] Secondly, the aforementioned fall-prevention warning steel strand can also be applied to the installation structure of steel connecting corridors. Specifically, the upper and lower ends of one side of the steel connecting corridor are connected to the steel beams installed in the wall via sliding seats. Two steel strand bodies are used in this case. The two ends of one steel strand body are connected to the upper steel connecting corridor and the corresponding steel beam, and the two ends of the other steel strand body are connected to the lower steel connecting corridor and the corresponding steel beam. When the steel connecting corridor is displaced, the steel strand body and the elastic sleeve are simultaneously stretched. At this time, the tension detection device detects the tension on the elastic sleeve and sends the current tension value to the alarm device. When the current tension value of the steel strand body is too large (in the case of steel connecting corridors, the alarm device has a preset standard tension value. When the current tension value is greater than the standard tension value, it is considered that the current tension value is too large), the alarm device will sound an alarm, and the work needs to be stopped and the sliding seat with a larger displacement needs to be replaced. In this application, the fall protection warning steel strand can detect the displacement of the steel connecting corridor at all times and issue a timely warning when the steel connecting corridor experiences displacement within the restricted range, thus preventing danger from occurring due to negligence in continuing to work.
[0011] When performing tensile testing on this type of fall arrestor steel strand, an elastic sleeve is fitted over the outside of the steel strand body, allowing the tensile testing device to be directly embedded in the sleeve. The tensile testing device detects the tension when the elastic sleeve is pulled, and the detected tension value is also the tension on the steel strand body. By comparing it with a preset value, it can effectively determine whether there are problems such as hoisting center of gravity deviation or excessive tension. At the same time, it can detect tensile force without dividing the steel strand body into two sections, ensuring the integrity of the steel strand body, making the steel strand body more stable when bearing heavy weights, and more suitable for various scenarios.
[0012] In a preferred embodiment, the two ends of the steel strand body are respectively provided with hooks and lifting rings, which are connected to the two ends of the steel strand body via shackles. The two ends of the elastic sleeve each have two symmetrically arranged through holes, with metal bushings on the hole walls for the shackles to pass through. The hooks and lifting rings are connected to the two ends of the elastic sleeve via shackles. During hoisting, the steel strand body is connected to the corresponding point on the object being hoisted via the lifting rings, and the hook of the hoisting equipment is connected to the hooks on the steel strand body. When set up, the elastic sleeve is connected to the hooks and lifting rings along with the steel strand body, ensuring that the tension on the elastic sleeve is the same as that on the steel strand body, guaranteeing the accuracy of the detection; at the same time, the metal bushings also prevent the elastic sleeve from being torn off by the hooks or lifting rings.
[0013] In a preferred embodiment, the elastic sleeve is made of plastic.
[0014] In a further preferred embodiment, the plastic sleeve is made of TPU. Considering the tensile load requirements during hoisting, the influence of the hoisting environment, and the requirement for recovery to its original shape after stress, the plastic sleeve uses TPU with comprehensive properties such as high elastic recovery rate, high strength, wear resistance, and weather resistance, ensuring long-term reliable use. Typically, the plastic sleeve is bonded to the steel strand body using high-performance epoxy resin or polyurethane adhesive, or it is clamped to the steel strand body using clamps.
[0015] In a preferred embodiment, the tensile force detection device includes an embedded tensile force sensor and an analog-to-digital converter (ADC) module. The embedded tensile force sensor and the ADC module are integrated together, and the signal output terminal of the embedded tensile force sensor is electrically connected to the signal input terminal of the ADC module. The ADC module can employ a high-precision ADC chip, and the embedded tensile force sensor can be a strain gauge tensile force sensor. The ADC module acquires, converts, and transmits the tensile signal data from the embedded tensile force sensor.
[0016] The aforementioned tensile testing device can communicate with the alarm device wirelessly (e.g., via Bluetooth, Wi-Fi, etc.); the tensile testing device can also be wired to the alarm device via a flexible wire. In this case, the alarm device can be directly installed near the tensile testing device (e.g., on the hook of a lifting device). When using a wired connection, it is only necessary to reserve contacts for the flexible wire connection on the tensile testing device and open holes on the elastic sleeve for the contacts to be exposed.
[0017] The alarm device mentioned above can be an audible and visual alarm, and the audible and visual alarm integrates a control module for processing the tensile force data and controlling the audible and visual alarm. The control module can be a microcontroller.
[0018] The beneficial effect of this utility model is that this anti-fall warning steel strand can promptly issue a warning when the steel strand is subjected to uneven force or excessive tension during the hoisting process of various steel structures, thus preventing the steel structure from falling. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the elastic sleeve fitted onto the steel strand body in Embodiment 1 of this utility model;
[0020] Figure 2 This is a cross-sectional view of the steel strand body and the elastic sleeve in Embodiment 1 of this utility model;
[0021] Figure 3 This is a schematic diagram of the anti-fall warning steel strand used in hoisting in Embodiment 1 of this utility model;
[0022] Figure 4 This is a schematic diagram of the application of the fall-prevention early warning steel strand in the installation structure of the steel corridor in Embodiment 2 of this utility model;
[0023] Figure 5 for Figure 4 A magnified view of position A in the middle. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0025] Example 1, as Figure 1-2 The illustrated fall protection warning steel strand includes an alarm device 1, multiple steel strand bodies 2, and multiple tension detection devices 3. Each steel strand body 2 is fitted with an elastic sleeve 4. The number of tension detection devices 3 and elastic sleeves 4 are the same and correspond one-to-one. The tension detection devices 3 are embedded in the corresponding elastic sleeves 4. The signal output terminal of the tension detection device 3 is communicatively connected to the signal input terminal of the alarm device 1.
[0026] In the aforementioned fall protection warning steel strands, such as Figure 3As shown, when used for hoisting with lifting equipment, multiple steel strand bodies 2 can be used simultaneously. One end of each steel strand body 2 is connected to various points of the object being hoisted 5, and the other end of the steel strand body 2 is connected to the hook 6 of the lifting equipment. The lifting equipment lifts the object being hoisted 5 through each steel strand body 2. When the object being hoisted 5 is about to leave the ground, each steel strand body 2 and the elastic sleeve 4 are simultaneously in a taut state, and the tension on the steel strand body 2 and the corresponding elastic sleeve 4 is the same. At this time, each tension detection device 3 can detect the tension on the elastic sleeve 4 and send each current tension value to the alarm device 1. The alarm device 1 compares each current tension value. When the tension difference exceeds the threshold, the alarm device 1 issues an alarm, indicating that the steel strand bodies 2 are not under uneven force, and the object being hoisted 5 is prone to tilting and falling during the hoisting process, requiring a change in the binding position of the steel strand bodies 2. In this application, the fall protection early warning steel strand can detect in time whether the hoisting is unstable or excessively biased to one side when the hoisted object 5 is about to leave the ground. This allows the staff to immediately adjust the hoisting binding position and prevent the hoisted object 5 from tilting and falling after being hoisted, thus avoiding danger.
[0027] When performing tensile testing on this type of fall protection warning steel strand, an elastic sleeve 4 is fitted over the outside of the steel strand body 2, allowing the tensile testing device 3 to be directly embedded in the elastic sleeve 4. The tensile testing device 3 detects the tensile force when the elastic sleeve 4 is pulled, and the detected tensile force value is also the tensile force on the steel strand body 2. By comparing it with a preset value, it can effectively determine whether there is a problem of hoisting center of gravity deviation or excessive tensile force. At the same time, it can detect tensile force without dividing the steel strand body 2 into two sections, ensuring the integrity of the steel strand body 2, making the steel strand body 2 more stable when bearing heavy weights, and more suitable for various scenarios.
[0028] The steel strand body 2 has hooks 201 and lifting rings 202 at both ends, which are connected to the two ends of the steel strand body 2 via shackles. The elastic sleeve 4 has two symmetrically arranged through holes at each end, with metal bushings on the hole walls for the shackles to pass through. During hoisting, the steel strand body 2 is connected to the corresponding point of the object 5 being hoisted via the lifting rings 202, and the hooks 6 of the hoisting equipment are connected to the hooks 201 on the steel strand body 2. When set up, the elastic sleeve 4 is connected to the hooks 201 and lifting rings 202 along with the steel strand body 2, ensuring that the tension on the elastic sleeve 4 is the same as that on the steel strand body 2, guaranteeing the accuracy of the detection; at the same time, the metal bushings also prevent the elastic sleeve 4 from being torn off by the hooks 201 or lifting rings 202.
[0029] The elastic sleeve 4 is made of TPU (Tencent Polyurethane). Considering the tensile load requirements during hoisting, the influence of the hoisting environment, and the requirement for recovery to its original shape after stress, the plastic sleeve uses TPU with comprehensive properties such as high elastic recovery rate, high strength, wear resistance, and weather resistance, ensuring long-term reliable use. Typically, the plastic sleeve is bonded to the steel strand body 2 using high-performance epoxy resin or polyurethane adhesive, or it is clamped to the steel strand body 2 using clamps.
[0030] The tensile testing device 3 includes an embedded tensile sensor and an analog-to-digital converter (ADC) module. The embedded tensile sensor and ADC module are integrated together, and the signal output terminal of the embedded tensile sensor is electrically connected to the signal input terminal of the ADC module. The ADC module can employ a high-precision ADC chip, and the embedded tensile sensor can be a strain gauge tensile sensor. The ADC module acquires, converts, and transmits the tensile signal data from the embedded tensile sensor.
[0031] The aforementioned tensile testing device 3 can communicate with the alarm device 1 wirelessly (e.g., via Bluetooth, Wi-Fi, etc.); alternatively, the tensile testing device 3 can be wired to the alarm device 1 via a flexible cable. In this case, the alarm device 1 can be directly installed near the tensile testing device 3 (e.g., on the hook 6 of the lifting equipment). When using a wired connection, it is only necessary to pre-reserve contacts for the flexible cable connection on the tensile testing device 3 and create holes on the elastic sleeve 4 to expose the contacts. The aforementioned alarm device 1 can be an audible and visual alarm, and the audible and visual alarm integrates a control module for processing the tensile value data and controlling the audible and visual alarm. The control module can be a microcontroller.
[0032] Example 2, the difference between this example and Example 1 is as follows: Figure 4-5As shown, the aforementioned fall-prevention warning steel strand is applied to the installation structure of the steel connecting corridor 7. Specifically, the upper and lower ends of one side of the steel connecting corridor 7 are connected to the steel beam 10 installed in the wall 9 via sliding seats 8. Two steel strand bodies 2 are used. The two ends of one steel strand body 2 are connected to the upper steel connecting corridor 7 and the corresponding steel beam 10, respectively, and the two ends of the other steel strand body 2 are connected to the lower steel connecting corridor 7 and the corresponding steel beam 10, respectively. When the steel connecting corridor 7 is displaced, the steel strand body 2 and the elastic sleeve are simultaneously stretched. At this time, the tension detection device detects the tension on the elastic sleeve and sends the current tension value to the alarm device. When the current tension value of the steel strand body 2 is too large (in the case of the steel connecting corridor 7, the alarm device has a preset standard tension value. When the current tension value is greater than the standard tension value, it is considered that the current tension value is too large), the alarm device will sound an alarm, and the work needs to be stopped and replaced with a sliding seat 8 with a larger displacement. In this application, the fall protection warning steel strand can constantly detect the displacement of the steel connecting corridor 7 and issue a timely warning when the steel connecting corridor 7 experiences displacement within the restricted range, thus preventing danger from occurring due to negligence in continuing operations.
Claims
1. A fall-prevention warning steel strand, comprising at least two steel strand bodies, characterized in that: Each of the steel strands is fitted with an elastic sleeve; it also includes an alarm device and at least two tension detection devices, the number of tension detection devices being the same as the number of elastic sleeves and corresponding one-to-one, and the tension detection devices being embedded in the corresponding elastic sleeves; The signal output terminal of the tensile testing device is communicatively connected to the signal input terminal of the alarm device.
2. The fall protection warning steel strand as described in claim 1, characterized in that: The steel strand body has hooks and lifting rings at both ends, which are connected to the two ends of the steel strand body by shackles. The elastic sleeve has two symmetrically arranged through holes at both ends, and the hole walls are provided with metal bushings for shackles to pass through. The hooks and lifting rings are connected to the two ends of the elastic sleeve by shackles.
3. The fall protection warning steel strand as described in claim 1, characterized in that: The elastic sleeve is made of plastic.
4. The fall protection warning steel strand as described in claim 3, characterized in that: The plastic sleeve is made of TPU.
5. The fall protection warning steel strand as described in claim 1, characterized in that: The tensile testing device includes an embedded tensile sensor and an analog-to-digital converter module, which are integrated together. The signal output terminal of the embedded tensile sensor is electrically connected to the signal input terminal of the analog-to-digital converter module.