A retractable safety fence and method of manufacture

Abstract

This invention provides a retractable safety fence and its manufacturing method, belonging to the field of fence manufacturing technology. It includes: a support component for providing overall support; a telescopic component connected to the support component, capable of horizontal extension and retraction to adjust the fence length, the telescopic component comprising multiple sets of intersecting links, the links being able to rotate relative to each other via a movable connection structure; and an intelligent alarm component installed on the support component, including a status monitoring unit, an alarm execution unit, and a power supply unit. The status monitoring unit collects abnormal status information of the fence, the alarm execution unit issues an alarm signal based on the abnormal status information, and the power supply unit supplies power to the intelligent alarm component. This invention not only solves the problems of inconvenient storage and poor adaptability of traditional fixed fences, and the problems of sputtering and uneven protection in retractable fences, but also achieves linkage between abnormal status monitoring and multi-dimensional alarms, overcoming the problems of single intelligent early warning function and delayed response in existing fences.

Description

Technical Field

[0001] This invention relates to the field of fence manufacturing technology, and in particular to a retractable safety fence and its manufacturing method. Background Technology

[0002] Safety fencing is a crucial facility for ensuring operational safety and delineating controlled areas in various fields, including building construction, power maintenance, large-scale event management, municipal engineering, and hazardous chemical storage. Its main function is to clearly define safety boundaries through physical isolation, preventing unauthorized personnel, vehicles, or animals from entering specific areas, thereby reducing the occurrence of accidents and ensuring the orderly conduct of on-site operations, activities, or material storage.

[0003] Traditional safety fences are primarily fixed structures, typically combining metal supports with protective panels or netting. These fences offer only basic isolation and have significant limitations. Firstly, the dimensions of fixed fences are fixed and cannot be changed, requiring substantial storage space when not in use. Furthermore, transporting and installing them requires multiple people, making it difficult to flexibly adjust their form to suit different spatial dimensions. In narrow or irregularly shaped areas, their adaptability is often insufficient, resulting in low space utilization. Secondly, the structural strength of fixed fences often relies on material thickness, making them relatively heavy. Additionally, due to long-term exposure to the outdoor environment, metal components are susceptible to weathering and corrosion, and are prone to deformation and damage from impacts, requiring significant manpower and material resources for subsequent maintenance.

[0004] With increasing demands for operational flexibility and safety across various sectors, retractable safety fences are gaining popularity. However, existing retractable fences still have several shortcomings in practical applications. Regarding telescopic performance, most products have simple linkage structures, making them prone to jamming and sticking during extension. Furthermore, the density of the fence after deployment is uneven, with some areas creating safety loopholes due to excessive gaps, failing to effectively prevent crossing. In terms of functional adaptability, existing retractable fences lack targeted intelligent protection designs. When subjected to external impacts, climbing, or unauthorized movement, they cannot issue timely warnings, failing to meet the refined safety warning needs of various sectors. Especially in scenarios requiring rapid response, their safety protection effectiveness is limited.

[0005] Therefore, there is an urgent need for a retractable safety fence that is structurally stable, provides comprehensive protection, and has intelligent early warning capabilities. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this invention is to provide a retractable safety fence and a manufacturing method, which not only solves the problems of inconvenient storage and poor adaptability of traditional fixed fences, as well as the problems of sticking and uneven protection of retractable fences, but also realizes the linkage between abnormal state monitoring and multi-dimensional alarms, overcoming the problems of single intelligent early warning function and delayed response of existing fences.

[0007] To achieve the above objectives, the present invention provides the following solution: A retractable safety fence includes: a support assembly for providing overall support; A telescopic component, connected to the support component, is capable of extending and retracting horizontally to adjust the length of the fence. The telescopic component includes multiple sets of cross-arranged links, which are connected to each other by a movable connection structure to achieve relative rotation. The intelligent alarm component, installed on the support component, includes a status monitoring unit, an alarm execution unit, and a power supply unit. The status monitoring unit is used to collect abnormal status information of the fence, the alarm execution unit is used to issue an alarm signal based on the abnormal status information, and the power supply unit is used to supply power to the intelligent alarm component.

[0008] Preferably, the support assembly includes at least two support columns, which are columnar structures made of high-strength metal. The top of each support column is provided with a rotating connection for connecting the telescopic assembly, and the bottom is provided with a guide for sliding with the telescopic assembly. The guide is a groove. The bottom of each support column is provided with an anti-slip pad, which is fixed to the bottom end face of the support column and is made of rubber.

[0009] Preferably, the support column is a rectangular hollow structure made of aluminum alloy, with a length of 1000~1500mm and a cross-sectional dimension of 50~100mm×50~100mm; the rotating connection part is a rotating shaft mounting seat set on the inner side of the top of the support column; the sliding groove is opened on the inner side of the bottom of the support column, with a length of 150~250mm; a slider is correspondingly set in the sliding groove, one end of the slider is located in the sliding groove, and the other end is connected to the connecting rod of the telescopic component, and can slide along the length direction of the sliding groove.

[0010] Preferably, the telescopic assembly includes a first link and a second link, which are arranged crosswise and are rotatably connected at their intersection by a movable connector; the two ends of the first link and the second link are respectively connected to corresponding support columns, one end of which is rotatably connected to the rotatable connection part of the support column, and the other end is connected to the slider of the support column.

[0011] Preferably, the movable connecting member is a stainless steel movable roller, which passes through the intersection of the first connecting rod and the second connecting rod, and has anti-detachment baffles at both ends; the first connecting rod and the second connecting rod are both made of high-strength metal, and both have an anti-corrosion layer on their surface.

[0012] Preferably, the first and second connecting rods are provided with symmetrically distributed grooves, and reflective strips are fixedly attached to the grooves. The reflective strips are made of engineering-grade reflective film. The first connecting rod has a length of 450~550mm, a width of 35~45mm, and a thickness of 6~10mm. The second connecting rod has a length of 430~530mm, a width of 33~43mm, and a thickness of 5~9mm.

[0013] Preferably, the status monitoring unit of the intelligent alarm component includes a vibration sensor, a displacement sensor, and an infrared sensor. The vibration sensor is located at the movable connection position between the connecting rod and the support column to monitor abnormal vibration. The displacement sensor is located at the slide groove of the support column to monitor abnormal sliding of the slider. The infrared sensors are arranged at intervals on the telescopic component to monitor intrusion behavior. The status monitoring unit is electrically connected to the control module of the intelligent alarm component.

[0014] Preferably, the alarm execution unit of the intelligent alarm component includes an audible and visual alarm module and a remote communication module. The audible and visual alarm module is a ring-shaped warning light installed on the top of the support column, which can emit light signals of different colors and frequencies, accompanied by corresponding sound signals. The remote communication module is used to push alarm information to a preset terminal device. The power supply unit is a rechargeable battery pack, which is electrically connected to the control module, the status monitoring unit and the alarm execution unit.

[0015] Preferably, the circular warning light uses an LED light source to emit red and yellow light signals. When abnormal intrusion or damage to the fence is detected, it emits a red high-frequency flashing light signal accompanied by a continuous buzzing sound of 100~120dB. When a fault is detected or the power supply unit is low, it emits a yellow low-frequency flashing light signal accompanied by an intermittent buzzing sound. The remote communication module supports 4G or Bluetooth communication and is used to push alarm data containing fence number, anomaly type and location information.

[0016] The present invention also provides a method for manufacturing the above-mentioned retractable safety fence, comprising the following steps: The support column blank is made of high-strength metal material through extrusion molding process. The top rotating connection part and the bottom sliding groove are processed. The slider is installed in the sliding groove, the anti-slip pad is fixed to the bottom end face of the support column, and the surface of the support column is treated with anti-corrosion to obtain the support component. The first and second connecting rods are manufactured using high-strength metal materials through cutting and milling processes. Grooves are made on the connecting rods and reflective strips are fixed on them. The corresponding connecting rod surfaces are treated with anti-corrosion. The movable connecting parts are manufactured using stainless steel materials. The first and second connecting rods are cross-connected through the movable connecting parts to obtain the telescopic assembly. Install each sensor of the status monitoring unit in a preset position, install the audible and visual alarm module of the alarm execution unit on the top of the support column, and connect the control module, power supply unit and remote communication module to complete the assembly and debugging of the intelligent alarm component. Connect the two ends of the telescopic component to the rotating connection part and the slider of the support component respectively, and test the telescopic function; fix the intelligent alarm component to the support component and conduct an overall power-on test to ensure that each functional module works normally.

[0017] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: (1) By using high-strength metal support columns, combined with rubber anti-slip pads fixed at the bottom, and the cross arrangement of the first and second connecting rods in the telescopic assembly, the connection of stainless steel movable rollers, and the sliding cooperation of the slider and the groove, this invention not only achieves stable placement of the fence in different terrains, but also ensures smooth extension and retraction in the horizontal direction. It solves the problems of inconvenient storage and poor adaptability of traditional fixed fences, as well as the problems of jamming and uneven protection of existing telescopic fences. At the same time, the anti-corrosion layer on the surface of the connecting rods and the engineering-grade reflective strips in the grooves significantly improve the weather resistance and nighttime visibility of the fence.

[0018] (2) The present invention integrates vibration sensor, displacement sensor and infrared sensor through the status monitoring unit of intelligent alarm component. Under the control of the control module, it works in conjunction with the circular LED warning light of alarm execution unit and remote communication module supporting 4G or Bluetooth communication to form a complete abnormal response closed loop of multi-dimensional monitoring, intelligent processing, hierarchical warning and accurate push. It realizes the accurate identification of abnormal vibration of fence, abnormal sliding of slider, intrusion behavior and other states, as well as the real-time push of alarm data including fence number, abnormal type and location information, effectively overcoming the defects of existing fence intelligent early warning function being single, false alarm rate and response lag.

[0019] (3) The retractable safety fence provided by the present invention not only ensures structural strength and functional stability, but also greatly improves the ease of handling and deployment adaptability of the fence, which can meet the safety protection needs of multiple fields such as building construction, power maintenance, and large-scale event management, significantly improve site utilization and management efficiency, and reduce maintenance costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of a retractable safety fence according to the present invention; Figure 2 This is a front view of a retractable safety fence according to the present invention; Figure 3 This is a side view of the support column structure of a retractable safety fence according to the present invention; Figure 4 This is a schematic diagram of the modular architecture of an intelligent alarm component for a retractable safety fence according to the present invention. Figure 5 This is a flowchart illustrating a method for manufacturing a retractable safety fence according to the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Support column; 2. Rotary shaft mounting base; 3. Slide groove; 4. Slider; 5. First connecting rod; 6. Second connecting rod; 7. Movable roller; 8. Anti-detachment baffle; 9. Reflective strip; 10. Vibration sensor; 11. Displacement sensor; 12. Infrared sensor; 13. Intelligent alarm component; 14. Audible and visual alarm module; 15. Remote communication module; 16. Control module; 17. Power supply unit; 18. Anti-slip pad. Detailed Implementation

[0023] 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.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example like Figure 1 and Figure 2As shown in the figure, the retractable safety fence provided in this embodiment mainly consists of a support component, a telescopic component, and an intelligent alarm component 13. The support component provides overall support, the telescopic component is connected to the support component and can extend and retract in the horizontal direction to adjust the fence length, and the intelligent alarm component 13 is installed on the support component to monitor fence abnormalities and issue alarm signals.

[0026] The support assembly includes at least two support columns 1, which are columnar structures made of high-strength metal. The high-strength metal material can be selected from 6061 aluminum alloy, Q355B low-alloy high-strength steel, etc. 6061 aluminum alloy has good corrosion resistance and moderate strength, making it suitable for long-term outdoor use; Q355B steel has high yield strength and can withstand greater external impact. A rotating connection is provided at the top, and a guide is provided at the bottom. The guide is a sliding groove 3, and an anti-slip pad 18 made of rubber is fixed to the bottom end face of the support column 1. Specifically, the support column 1 is a rectangular hollow structure made of aluminum alloy, with a length between 1000 and 1500 mm. This length meets the isolation height requirements in most scenarios without causing the center of gravity of the support column 1 to be too high, thus affecting stability. The cross-sectional dimensions are 50-100 mm × 50-100 mm. This cross-sectional dimension ensures support strength while reducing material usage and overall weight. The rotating connection is a rotating shaft mounting seat 2 located on the inner side of the top of the support column 1. The rotating shaft allows the two support columns 1 to be rotatably connected to their respective connecting rods. For example... Figure 3 As shown, the slide groove 3 is opened on the inner side of the bottom of the support column 1, with a length of 150~250mm. This length matches the range of motion of the connecting rod, which can ensure that the slider 4 can still slide stably when the telescopic component is at its maximum extension range. The slider 4 is correspondingly provided in the slide groove 3. One end of the slider 4 is located in the slide groove 3, and the other end is connected to the telescopic component, and it can slide along the length direction of the slide groove 3.

[0027] The telescopic assembly includes multiple sets of cross-arranged connecting rods, which rotate relative to each other via a movable connection structure. Specifically, the connecting rods are divided into a first connecting rod 5 and a second connecting rod 6. Both first connecting rods 5 and 6 are made of high-strength metal materials such as 45# steel or 20CrMnTi alloy structural steel. 45# steel, after tempering, possesses high strength and toughness, while 20CrMnTi, through carburizing and quenching, improves surface hardness and wear resistance, extending the connecting rod's service life. The first connecting rods 5 and 6 are arranged cross-shaped, with their intersection connected to a movable connector for rotational rotation. Both ends of the first connecting rods 5 and 6 are connected to corresponding support columns 1, with one end rotatably connected to the rotating connection part of the support column 1, and the other end connected to the slider 4 of the support column 1. The movable connector is a stainless steel movable roller 7, specifically 304 stainless steel, which has good corrosion resistance and wear resistance, adapting to complex environments such as outdoor humidity. The movable roller 7 passes through the intersection of the first connecting rods 5 and 6, and its ends are equipped with anti-detachment baffles 8. Both the first connecting rod 5 and the second connecting rod 6 are coated with an anti-corrosion layer, which is a zinc-nickel alloy plating with a thickness of 8-12 μm. This effectively improves the salt spray resistance of the connecting rods and meets the anti-corrosion requirements for long-term outdoor use. In addition, symmetrically distributed grooves are formed on the first connecting rod 5 and the second connecting rod 6, within which reflective strips 9 are fixedly attached. The reflective strips 9 are made of engineering-grade reflective film. The first connecting rod 5 has a length of 450-550 mm, a width of 35-45 mm, and a thickness of 6-10 mm; the second connecting rod 6 has a length of 430-530 mm, a width of 33-43 mm, and a thickness of 5-9 mm. The difference in dimensions between the two sets of connecting rods is designed to ensure structural stability after cross-connection and avoid jamming during extension and retraction. The thickness parameter is to reduce the overall weight while meeting strength requirements.

[0028] like Figure 4As shown, the intelligent alarm component 13 includes a status monitoring unit, an alarm execution unit, and a power supply unit 17. The status monitoring unit is used to collect abnormal status information of the fence and includes a vibration sensor 10, a displacement sensor 11, and an infrared sensor 12. Vibration sensor 10 is a dual-axis accelerometer, model SCA100T-D01, with a measurement accuracy of ±0.5%FS and a range of ±2g. It can accurately capture minute vibrations at the moving connection position of the connecting rod, distinguishing between normal extension and contraction and abnormal impact. It is installed at the moving connection position between the connecting rod and the support column 1 to monitor abnormal vibrations. Displacement sensor 11 is a rod-type displacement sensor, model KTC-100, with a measurement accuracy of ±0.1%FS and a range of 0~300mm. It can monitor the sliding distance of slider 4 in the slide groove 3 in real time. When it exceeds the normal extension and contraction range, it triggers an alarm. It is installed at the slide groove 3 of the support column 1 to monitor abnormal sliding of slider 4. Infrared sensor 12 is a diffuse reflection infrared photoelectric sensor, model E18-D80NK, with a measurement accuracy of ±2mm and a detection distance of 3~80cm. It is arranged at intervals on the extension assembly and can effectively monitor intrusion behavior within a 1-meter range with a response time ≤20ms. It is used to monitor intrusion behavior. The status monitoring unit is electrically connected to the control module 16 of the intelligent alarm component 13. The control module 16 uses an STM32F103C8T6 microcontroller with a main frequency of 72MHz. It has rich I / O interfaces and can realize real-time processing of multi-sensor data and output of control commands.

[0029] The alarm execution unit includes an audible and visual alarm module 14 and a remote communication module 15. The audible and visual alarm module 14 is a ring-shaped warning light mounted on the top of the support column 1, capable of emitting light signals of different colors and frequencies, accompanied by corresponding audible signals. The remote communication module 15 is used to push alarm information to preset terminal devices. The remote communication module 15 uses an EC20 4G module, supports the LTE Cat4 standard, has a data transmission rate of up to 150Mbps, and is also compatible with Bluetooth 5.0, ensuring stable alarm information delivery in complex environments. The power supply unit 17 is a rechargeable battery pack, using an 18650 lithium battery pack with a capacity of 5000mAh, an operating voltage of 3.7V, and supports 5V / 2A fast charging, providing a battery life of up to 72 hours. It is electrically connected to the control module 16, the status monitoring unit, and the alarm execution unit. The circular warning light uses an LED light source to emit red and yellow light signals. When abnormal intrusion or damage to the fence is detected, it emits a high-frequency flashing red light signal (3Hz) accompanied by a continuous buzzer sound of 100~120dB. When a fault is detected or the power supply unit 17 is low, it emits a low-frequency flashing yellow light signal (1Hz) accompanied by an intermittent buzzer sound. The design of different frequencies and colors of light and sound signals helps staff quickly distinguish alarm types and improves response efficiency. The remote communication module 15 is used to push alarm data containing fence number, anomaly type, and location information.

[0030] In addition, such as Figure 5 As shown, this embodiment also provides a method for manufacturing the above-mentioned retractable safety fence, including the following steps: Step 100: Use high-strength metal material to make the support column blank through extrusion molding process, process its top rotating connection part and bottom sliding groove, install the slider in the sliding groove, fix the anti-slip pad to the bottom end face of the support column, and perform anti-corrosion treatment on the surface of the support column to obtain the support assembly. Step 200: The first and second connecting rods are processed using high-strength metal materials through cutting and milling processes. Grooves are made on the connecting rods and reflective strips are fixed on them. Corrosion protection is applied to the corresponding connecting rod surfaces. The movable connectors are processed using stainless steel materials. The first and second connecting rods are cross-connected through the movable connectors to obtain the telescopic assembly. Step 300: Install each sensor of the status monitoring unit in the preset position, install the audible and visual alarm module of the alarm execution unit on the top of the support column, and connect the control module, power supply unit and remote communication module to complete the assembly and debugging of the intelligent alarm component; Step 400: Connect both ends of the telescopic component to the rotating connection part and the slider of the support component respectively, and test the telescopic function; fix the intelligent alarm component to the support component, and perform an overall power-on test to ensure that each functional module works normally.

[0031] Based on the above, the specific process of manufacturing the retractable safety fence is as follows: First, a support column 1 blank is made by extrusion molding using high-strength metal material. The extrusion molding process can ensure the consistency of the cross-sectional dimensions of the support column 1, has high production efficiency, and is suitable for mass production. The top rotating connection part and the bottom sliding groove 3 are processed. The slider 4 is installed in the sliding groove 3. The anti-slip pad 18 is fixed to the bottom end face of the support column 1, and the surface of the support column 1 is treated with anti-corrosion to obtain the support component.

[0032] Secondly, the first connecting rod 5 and the second connecting rod 6 are processed by cutting and milling using high-strength metal materials. The cutting and milling process can ensure the dimensional accuracy of the connecting rods, with the error controlled within ±0.1mm. Grooves are opened on the connecting rods and reflective strips 9 are fixed, and the corresponding connecting rod surfaces are treated with anti-corrosion. Stainless steel materials are used to process the movable connecting parts, and the first connecting rod 5 and the second connecting rod 6 are cross-connected through the movable connecting parts to obtain the telescopic assembly.

[0033] Then, each sensor of the status monitoring unit is installed in a preset position, and the audible and visual alarm module 14 of the alarm execution unit is installed on the top of the support column 1 and connected to the control module 16, the power supply unit 17 and the remote communication module 15 to complete the assembly and debugging of the intelligent alarm component 13. During the debugging process, the trigger threshold of the sensor needs to be calibrated to ensure the accuracy of the alarm. For example, the abnormal vibration threshold of the vibration sensor 10 is set to 0.5g and the abnormal sliding threshold of the displacement sensor 11 is set to 200mm.

[0034] Finally, connect both ends of the telescopic component to the rotating connection part of the support component and the slider 4 respectively, and test the telescopic function. The test requires 1,000 telescopic cycles to ensure that there is no jamming or loosening. Fix the intelligent alarm component 13 to the support component and perform an overall power-on test to ensure that each functional module works normally.

[0035] Furthermore, the reflective strips 9 on the first link 5 and the second link 6 reflect light in low-light conditions, serving as a warning and alerting people to the presence of the fence. The anti-corrosion layer on the surface of the links improves their corrosion resistance and extends the service life of the fence. The support column 1 adopts an aluminum alloy rectangular hollow structure, which reduces the overall weight while ensuring strength, making it easy to transport and install.

[0036] Working Principle: When using this telescopic safety fence, the telescopic component is stretched or contracted horizontally according to the required length of the isolation area. Because the first link 5 and the second link 6 are arranged crosswise and connected by a movable roller 7, with one end of the link rotatably connected to the rotating connection of the support column 1 and the other end slidably connected to the groove 3 of the support column 1 via a slider 4, the link can rotate flexibly during extension and retraction, and the slider 4 slides smoothly within the groove 3, thus adjusting the fence length. The rubber anti-slip pad 18 at the bottom of the support column 1 increases friction with the ground, preventing the fence from shifting during use and ensuring its stability.

[0037] During fence operation, the intelligent alarm component 13 operates continuously. Vibration sensor 10 monitors abnormal vibrations at the movable connection point between the connecting rod and support column 1, displacement sensor 11 monitors abnormal sliding of slider 4 within the groove 3, and infrared sensor 12 monitors for intrusion. The abnormal status information collected by these sensors is transmitted to control module 16. After processing the information, control module 16 sends a command to the alarm execution unit. When abnormal intrusion or damage to the fence is detected, the circular warning light of the audible and visual alarm module 14 emits a red high-frequency flashing light signal, accompanied by a continuous buzzing sound of 100-120dB. When a device malfunction is detected or the power supply unit 17 has low power, a yellow low-frequency flashing light signal is emitted, accompanied by an intermittent buzzing sound. Simultaneously, remote communication module 15 pushes alarm data containing the fence number, abnormality type, and location information to preset terminal devices via 4G or Bluetooth communication, so that relevant personnel can be promptly informed and take appropriate measures. Power supply unit 17 provides stable power support to all parts of the intelligent alarm component 13, ensuring its normal operation.

[0038] Therefore, the above-mentioned retractable safety fence and manufacturing method not only solves the problems of inconvenient storage and poor adaptability of traditional fixed fences, as well as the problems of retractable fences being stuck during extension and retraction and uneven protection, but also realizes the linkage between abnormal state monitoring and multi-dimensional alarms, overcoming the problems of existing fences having single intelligent early warning functions and delayed response.

[0039] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A retractable safety fence characterised in that, include: Support components are used to provide overall support; A telescopic component, connected to the support component, is capable of extending and retracting horizontally to adjust the length of the fence. The telescopic component includes multiple sets of cross-arranged links, which are connected to each other by a movable connection structure to achieve relative rotation. The intelligent alarm component, installed on the support component, includes a status monitoring unit, an alarm execution unit, and a power supply unit. The status monitoring unit is used to collect abnormal status information of the fence, the alarm execution unit is used to issue an alarm signal based on the abnormal status information, and the power supply unit is used to supply power to the intelligent alarm component.

2. A retractable safety fence according to claim 1, wherein, The support assembly includes at least two support columns, each of which is a columnar structure made of high-strength metal. The top of each support column is provided with a rotating connection for connecting the telescopic assembly, and the bottom of each support column is provided with a guide for sliding with the telescopic assembly. The guide is a groove. The bottom of each support column is provided with an anti-slip pad, which is fixed to the bottom end face of the support column and is made of rubber.

3. A retractable safety fence according to claim 2, characterized in that, The support column is a rectangular hollow structure made of aluminum alloy, with a length of 1000~1500mm and a cross-sectional size of 50~100mm×50~100mm; the rotating connection part is a rotating shaft mounting seat set on the inner side of the top of the support column; the sliding groove is opened on the inner side of the bottom of the support column, with a length of 150~250mm; a slider is correspondingly set in the sliding groove, one end of the slider is located in the sliding groove, and the other end is connected to the connecting rod of the telescopic component, and can slide along the length direction of the sliding groove.

4. The retractable safety fence according to claim 1, characterized in that, The telescopic assembly includes a first link and a second link, which are arranged crosswise. The intersection of the two links is rotatably connected by a movable connector. The two ends of the first link and the second link are respectively connected to the corresponding support columns. One end is rotatably connected to the rotating connection part of the support column, and the other end is connected to the slider of the support column.

5. A retractable safety fence according to claim 4, characterized in that, The movable connecting component is a stainless steel movable roller that passes through the intersection of the first connecting rod and the second connecting rod, and has anti-detachment baffles at both ends; the first connecting rod and the second connecting rod are both made of high-strength metal, and both have an anti-corrosion layer on their surface.

6. A retractable safety fence according to claim 5, characterized in that, The first and second connecting rods have symmetrically distributed grooves, and reflective strips are fixedly attached to the grooves. The reflective strips are made of engineering-grade reflective film. The first connecting rod has a length of 450~550mm, a width of 35~45mm, and a thickness of 6~10mm. The second connecting rod has a length of 430~530mm, a width of 33~43mm, and a thickness of 5~9mm.

7. A retractable safety fence according to claim 1, characterized in that, The status monitoring unit of the intelligent alarm component includes a vibration sensor, a displacement sensor, and an infrared sensor. The vibration sensor is located at the movable connection position between the connecting rod and the support column to monitor abnormal vibration. The displacement sensor is located at the slide groove of the support column to monitor abnormal sliding of the slider. The infrared sensors are spaced apart on the telescopic assembly to monitor intrusion behavior; the status monitoring unit is electrically connected to the control module of the intelligent alarm assembly.

8. A retractable safety fence according to claim 7, characterized in that, The alarm execution unit of the intelligent alarm component includes an audible and visual alarm module and a remote communication module. The audible and visual alarm module is a ring-shaped warning light installed on the top of the support column, which can emit light signals of different colors and frequencies, accompanied by corresponding sound signals. The remote communication module is used to push alarm information to a preset terminal device. The power supply unit is a rechargeable battery pack, which is electrically connected to the control module, the status monitoring unit and the alarm execution unit.

9. A retractable safety fence according to claim 8, characterized in that, The circular warning light uses an LED light source to emit red and yellow light signals. When abnormal intrusion or damage to the fence is detected, it emits a red high-frequency flashing light signal accompanied by a continuous buzzing sound of 100~120dB. When a fault is detected or the power supply unit is low, it emits a yellow low-frequency flashing light signal accompanied by an intermittent buzzing sound. The remote communication module supports 4G or Bluetooth communication and is used to push alarm data containing fence number, anomaly type and location information.

10. A method for manufacturing a retractable safety fence as described in any one of claims 1 to 9, characterized in that, Includes the following steps: The support column blank is made of high-strength metal material through extrusion molding process. The top rotating connection part and the bottom sliding groove are processed. The slider is installed in the sliding groove, the anti-slip pad is fixed to the bottom end face of the support column, and the surface of the support column is treated with anti-corrosion to obtain the support component. The first and second connecting rods are manufactured using high-strength metal materials through cutting and milling processes. Grooves are made on the connecting rods and reflective strips are fixed on them. The corresponding connecting rod surfaces are treated with anti-corrosion. The movable connecting parts are manufactured using stainless steel materials. The first and second connecting rods are cross-connected through the movable connecting parts to obtain the telescopic assembly. Install each sensor of the status monitoring unit in a preset position, install the audible and visual alarm module of the alarm execution unit on the top of the support column, and connect the control module, power supply unit and remote communication module to complete the assembly and debugging of the intelligent alarm component. Connect the two ends of the telescopic component to the rotating connection part and the slider of the support component respectively, and test the telescopic function; fix the intelligent alarm component to the support component and conduct an overall power-on test to ensure that each functional module works normally.

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