Device and method for detecting performance of safety net, safety belt and safety rope system

Abstract

The invention discloses a device and a method for detecting the performance of a safety net, a safety belt and a safety rope system, and the device comprises a ground four-column type loading frame which is provided with a first test hanging point and a second test hanging point, and the first test hanging point is connected with a first force sensor; the steel wire rope traction system comprises an elevator, a pulley, a steel wire rope and a release device; the releasing device is connected to the tail end of the steel wire rope, and the tail end of the steel wire rope is further connected with a second force sensor. The electrical control system is provided with a plurality of data communication ports; the computer data acquisition and processing system is in communication connection with the electrical control system and is used for performing programmable control on each system; the device not only can be used for dynamic and static load test of a whole body and a safety rope of a pole surrounding operation safety belt, an area limiting safety belt and a falling hanging safety belt, but also can be used for impact resistance and penetration resistance test of a safety flat net, a vertical net and a dense net for high-place operation of buildings and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection product detection, in particular to a device and method for detecting the performance of a safety net, a safety belt and a safety rope system. Background Art

[0002] Safety nets, safety belts, and safety ropes are widely used in construction projects, industrial production, aerial work, and other engineering sites that need to protect construction workers from accidental falls or falling objects. Their system performance indicators are important bases for safe production and construction, including indicators such as the impact resistance of safety nets, and the dynamic and static mechanical properties of safety belts and safety ropes. Mechanical loading test detection is an important method to judge the performance indicators of safety nets, safety belts, and safety rope systems. Common detection methods include using heavy objects, or simulating people wearing corresponding products, to perform free fall from the height required by the standard, or connecting corresponding products with fixed nodes to generate dynamic and static loads. Common testing standards include GB / T 6096-2020, GB24543-2009, and GB5725-2009.

[0003] With the continuous development of production technology of safety nets, safety belts and safety ropes and the continuous improvement of national policies on safety production protection, the safety nets, safety belts and safety ropes produced in the industry have developed from the original single specifications and functions to the product level of multiple specifications and suitable for multiple application environments. Based on the current development status of the industry, the existing simple brackets with wire rope traction and other loading methods have great defects and limitations in the detection of the performance of safety nets, safety belts and safety rope systems. It is mainly reflected in: 1. Common testing equipment on the market only has a single detection function such as safety nets or safety belts, and the detection operation process is cumbersome and occupies a large area of ​​the site; 2. Common safety rope detection equipment on the market uses conventional tensile machines to generate loads. The instrument is generally a reaction frame base structure. The pressure base of the instrument is small and fixed. It is mainly aimed at the detection of small specimens, and it is difficult to measure products of various specifications. Its form cannot meet the needs of combined linkage detection of safety belts, safety ropes, etc.; 3. There is a lack of testing equipment that integrates the performance detection of safety nets, safety belts and safety rope systems. The above problems seriously restrict the development of engineering applications and detection and scientific research in the fields of safety nets, safety belts and safety ropes. Summary of the invention

[0004] The object of the present invention is to provide a device and method for detecting the performance of a safety net, a safety belt, and a safety rope system, aiming to solve the problems raised in the above-mentioned background technology.

[0005] The present invention is achieved in that:

[0006] According to one aspect of the present invention, the present invention provides a device for detecting the performance of a safety net, a safety belt, and a safety rope system, comprising:

[0007] A ground four-column loading frame, wherein a first test hanging point and a second test hanging point are provided on the ground four-column loading frame, and the first test hanging point is connected to a first force sensor;

[0008] The wire rope traction system includes a hoist, a pulley, a wire rope and a release device, wherein the pulley is arranged on a four-column loading frame on the ground, the wire rope is connected to the hoist and passes through the pulley, and the height position of the end of the wire rope can be adjusted within a certain height range under the drive of the hoist; the release device is connected to the end of the wire rope, and the end of the wire rope is also connected to a second force sensor;

[0009] An electrical control system having a plurality of data communication ports, wherein the first force sensor, the hoist, and the second force sensor are all electrically connected to the electrical control system;

[0010] A displacement sensor is arranged on the hoist and is electrically connected to the electrical control system. The displacement sensor is used to detect the displacement data of the end of the wire rope and transmit the detected displacement data to the electrical control system;

[0011] The computer data acquisition and processing system is connected to the electrical control system for communication and is used to perform programmable control on each system and can collect data generated and received by the electrical control system.

[0012] Furthermore, the ground four-column loading frame includes an integral frame, a platform, a tensioning device and ground embedded parts. The integral frame and the tensioning device both include interconnected beams, columns and diagonal braces. The ground embedded parts are embedded in the concrete floor, and the integral frame and the tensioning device are connected to the ground embedded parts.

[0013] Furthermore, the platform is arranged on an integral frame, a staircase leading to the platform is arranged on the integral frame, and the first test hanging point is installed at the position of the platform.

[0014] Furthermore, the cross beams and columns of the ground four-column loading frame are made of I-beams; the ground embedded parts include a plurality of I-beams, and the I-beams are connected by welding to form a grid structure.

[0015] Furthermore, the second test hanging point is located at a ground position vertically corresponding to the release device, and the second test hanging point includes one or more lifting ring fixtures. When the second test hanging point is subjected to a tensile force of 20 kN, the maximum displacement is less than 1 mm.

[0016] Furthermore, a test pit is provided at the center of the ground of the four-column loading frame, and the test pit is located directly below the release device. The test pit is filled with sand to form a buffer sand pool.

[0017] Furthermore, the test pit is in a rectangular shape, with a length of not less than 2000 mm, a width of not less than 1500 mm, and a depth of not less than 1600 mm. The test pit is provided with steps leading from the bottom of the pit to the ground.

[0018] Furthermore, the release device has a battery and a wireless communication module, the battery is used to power the release device, and the wireless communication module is communicatively connected to a remote controller.

[0019] Furthermore, the electrical control system includes a control box, which is arranged on a four-column loading frame on the ground. A fully digital measurement and control device is arranged in the control box. A force data communication port, a displacement data communication port, a transmission system control communication port and a computer data communication port are arranged on the control box; the first force sensor and the second force sensor are connected to the force data communication port through a data cable, the displacement sensor is connected to the displacement data communication port through a data cable, the hoist is connected to the transmission system control communication port through a data cable, and the computer data acquisition and processing system is connected to the computer data communication port through a data cable.

[0020] Furthermore, the computer data acquisition and processing system includes computer hardware equipment and measurement and control software. The computer hardware equipment includes a host, a display, and input and output equipment. The input and output equipment includes a mouse, a keyboard, and a printer.

[0021] According to the second aspect of the present invention, the present invention provides a detection method, using the above-mentioned device for detecting the performance of safety nets, safety belts, and safety rope systems to detect any one or more safety protection products among safety nets, safety belts, and safety ropes.

[0022] The present invention can not only be used for dynamic and static load testing of safety belts for fence operations, area restriction safety belts, fall suspension safety belts as a whole, and safety ropes, but can also be used for impact resistance and penetration resistance testing of safety flat nets, vertical nets, and dense mesh nets used for high-altitude operations such as construction. The ground four-column loading frame of the present invention uses ground embedded parts to be integrated with the concrete floor, and can utilize the conditions of the site ground to solve the problems of general detection test equipment due to insufficient rigidity, torque offset during the test, and unstable shaking of the device. The specifications and types of safety nets, safety belts, and safety ropes that can be detected cover the requirements in relevant product standards. The actual floor area of ​​the present invention is only the ground four-column loading frame and the safety net laying and hanging part, and there is no need to occupy indoor area, which greatly reduces the pressure of site use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a device for detecting the performance of a safety net, a safety belt, and a safety rope system provided by the present invention;

[0024] Figure 2 A top view of the test pit of the present invention;

[0025] Figure 3 The present invention provides an electric control structure block diagram of a device for detecting the performance of a safety net, a safety belt, and a safety rope system. DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0028] Example 1

[0029] like Figure 1 and Figure 3 As shown, the present invention provides a device for detecting the performance of a safety net, a safety belt, and a safety rope system, the device comprising a ground four-column loading frame, a wire rope traction system, an electrical control system, a displacement sensor 11, and a computer data acquisition and processing system.

[0030] like Figure 1As shown, the ground four-column loading frame is set on the concrete floor 14. The ground four-column loading frame includes an integral frame 1, a platform 3, a tensioning device 6 and a ground embedded part 13. The integral frame 1 and the tensioning device 6 both include interconnected crossbeams, columns and diagonal braces, and the ground embedded part 13 is embedded in the concrete floor 14. The integral frame 1 and the tensioning device 6 are connected to the ground embedded part 13 and fixedly installed on the concrete floor 14 through the ground embedded part 13. The platform 3 is set on the integral frame 1, and the integral frame 1 is provided with stairs leading to the platform 3, which is convenient for the staff to go up and down the platform 3. The integral frame 1, the tensioning device 6 and the ground embedded part 13 form a cage-type self-balancing reaction frame structure. The crossbeams and columns of the integral frame 1 and the tensioning device 6 are made of I-beams. The ground embedded part 13 includes a plurality of I-beams and bolts. A plurality of I-beams are welded to form a grid structure. Specifically, there are seven I-beams in the ground embedded part 13, including three longitudinal I-beams and four transverse I-beams. The bolts are located on the upper surface of the ground embedded part 13, exposing the concrete floor 14. The upper surface of the ground embedded part 13 is 20 mm higher than the concrete floor 14, which is convenient for the fixed connection between the integral frame 1, the tensioning device 6 and the ground embedded part 13, and is used for the reaction force transmission when the ground four-column loading frame is loaded.

[0031] like Figure 1 As shown, the wire rope traction system includes a hoist 2, a pulley, a wire rope 7 and a release device 4. The pulley is arranged on a four-column loading frame on the ground, and the hoist 2 is installed on a concrete floor 14. The hoist 2 has a servo motor and a winch driven by the servo motor. The wire rope 7 is connected to the winch of the hoist 2 and passes through the pulley. The height position of the end of the wire rope 7 can be adjusted within a certain height range driven by the hoist 2. The servo motor can accurately adjust the speed of the winch, so that the displacement speed of the end of the wire rope 7 can be accurately controlled. The release device 4 is connected to the end of the wire rope 7, and the end of the wire rope 7 is also connected to a second force sensor 12 for static load testing. The release device 4 has a battery and a wireless communication module. The battery is used to power the release device 4. The wireless communication module is connected to a remote control. In this way, the release device 4 can be controlled by the remote control to release the heavy object, avoiding the failure and power consumption risks caused by the entanglement of wires due to the use of wired methods. The release device 4 is also connected to a rod frame structure for keeping the release device 4 vertically downward, including two vertical poles and a horizontal rod that can be translated up and down. A special quick-connect connector is used between the connector of the release device 4 and the weight or the manikin, which can be quickly connected when in use and quickly disassembled when not in use.

[0032] like Figure 1As shown, a first test hanging point 9 and a second test hanging point 10 are provided on the ground four-column loading frame, the first test hanging point 9 is connected to a first force sensor 5, and the first test hanging point 9 is installed at the position of the platform 3. The second test hanging point 10 is located at a ground position vertically corresponding to the release device 4, and the second test hanging point 10 includes one or more lifting ring fixtures. When the second test hanging point 10 is subjected to a tensile force of 20kN, the maximum displacement is less than 1mm. The first test hanging point 9 is equipped with a first force sensor 5 for dynamic testing, and the second test hanging point 10 is used for static load testing.

[0033] like Figure 2 As shown, a test pit 15 for fall test buffer is provided at the center of the ground of the four-column loading frame. The test pit 15 is located directly below the release device 4. The test pit 15 is filled with sand to form a buffer sand pool. The test pit 15 is in the shape of a rectangular parallelepiped, and the depth of the test pit 15 must meet the maximum fall height requirement. In this embodiment, the length of the test pit 15 is 2000 mm, the width is 1500 mm, and the depth is 1600 mm. The test pit 15 is provided with a step 16 leading from the bottom of the pit to the ground, so that the staff can enter and exit the test pit 15 easily.

[0034] like Figure 1 and Figure 3 As shown, the electrical control system includes a control box 8, which is arranged on a four-column loading frame on the ground. A fully digital measurement and control device is arranged in the control box 8. The control box 8 is provided with a force value data communication port, a displacement value data communication port, a transmission system control communication port and a computer data communication port. The first force sensor 5 and the second force sensor 12 are connected to the force value data communication port through a data cable, the hoist 2 is connected to the transmission system control communication port through a data cable, and the computer data acquisition and processing system is connected to the computer data communication port through a data cable. The displacement sensor 11 is arranged on the hoist 2, and the displacement sensor 11 is connected to the displacement value data communication port through a data cable. The displacement sensor 11 is used to detect the displacement data of the end of the wire rope 7 and transmit the detected displacement data to the electrical control system. The control box 8 and its electrically connected electrical components adopt a standard design for outdoor and indoor use, which can be applied to different detection environments.

[0035] The computer data acquisition and processing system includes computer hardware equipment and measurement and control software. The computer hardware equipment includes a host, a display, and input and output devices. The input and output devices include a mouse, a keyboard, and a printer. The computer data acquisition and processing system can be used to programmatically control each system and can collect data generated and received by the electrical control system. By setting up a computer data acquisition and processing system, the automated control of the testing process of each safety protection product can be achieved through programming, and data can be automatically collected, summarized, and analyzed, and a test report can be automatically issued.

[0036] Example 2

[0037] Application in the testing of restricted-use safety belts with only a tether and a safety line:

[0038] 1-1) Put the strap on the simulator according to the product instructions, and then fix the simulator to the second test hanging point 10 on the ground;

[0039] 1-2) Connect the safety rope to the lanyard according to the product instructions;

[0040] 1-3) Mark the edges of all adjustment buckles on the laces;

[0041] 1-4) Take a safety rope of (1000±10) mm and connect it to the loading device;

[0042] 1-5) Start the loading device and pre-tighten it appropriately, and measure the length of the safety rope;

[0043] 1-6) Start the loading device and apply a load of (15+0.3) kN, maintaining the load for at least 3 minutes;

[0044] 1-7) After unloading, observe and record the condition of the seat belt, measure and record the displacement of the belt in the adjustment buckle, and the test is completed.

[0045] Example 3

[0046] Application in the detection of fall suspension safety belts with lanyards, double-tail safety ropes and buffers:

[0047] 2-1) Wear the strap on the simulator according to the product instructions, and connect the simulator head ring to the remote control release device;

[0048] 2-2) Connect the safety rope and the buffer to the tether and the first test hanging point 9 respectively according to the product instruction manual. If the length of the safety rope is adjustable, the length of the safety rope should be adjusted to the maximum length;

[0049] 2-3) Mark the edges of all adjustment buckles on the laces;

[0050] 2-4) Lift the manikin to a position where the connection point between the tether and the safety rope is (1000+50) mm above the test hanging point, and use the positioning device and laser marking to ensure that the horizontal distance from the release point to the test hanging point is no more than 300 mm;

[0051] 2-5) Release the simulator and record the peak impact force of the seat belt while the simulator is in a suspended state;

[0052] 2-6) After the simulator is stationary, observe and record the condition of the seat belt, measure the extension length and record the displacement of the belt in the adjustment buckle;

[0053] 2-7) Unload and adjust the laces, and re-mark the edges of all adjustment buckles of the laces;

[0054] 2-8) Replace the safety rope and buffer, and connect the safety rope and buffer to the lanyard and test hanging point respectively according to the product instructions. If the length of the safety rope is adjustable, adjust the length of the safety rope to the maximum length;

[0055] 2-9) Connect the manikin hip ring to the release device 4, lift the manikin hip ring to the same level as the test hanging point, and use the positioning device and laser marking to ensure that the horizontal distance between the release point and the test hanging point is no more than 300 mm;

[0056] 2-10) Release the simulator and record the peak impact force of the seat belt while the simulator is in suspension. After the simulator is still, observe and record the condition of the seat belt. The test is complete.

[0057] Example 4

[0058] Application in static mechanical properties testing of safety ropes:

[0059] 3-1) Install both ends of the safety rope on the release device 4 and the second test hanging point 10;

[0060] 3-2) Start the wire rope traction system and load it uniformly to the test force value required by the product standard. The loading speed is: the webbing and fiber rope safety ropes should not exceed 100mm / min, and the wire rope and chain safety ropes should not exceed 30mm / min;

[0061] 3-3) After reaching the specified load, maintain the load for 3 minutes, observe the displacement of the rigid node, unload, observe and record the damage of the safety rope, and the test is completed.

[0062] Example 5

[0063] Application in the impact resistance test of safety nets:

[0064] 4-1) Fix the safety net on the tensioning device 6;

[0065] 4-2) Install the test weight on the release device 4;

[0066] 4-3) Lift the test weight to the specified height (test height: 7m for flat net; 2m for vertical net; 1.8m for Class A close mesh net; 1.2m for Class B close mesh net); release the test weight, observe the sample condition, and the test is over.

[0067] In summary, the present invention can not only be used for the dynamic and static load test of the safety belt for fence operation, the safety belt for area restriction, the overall safety belt for falling and the safety rope, but also can be used for the impact resistance and penetration resistance test of the safety flat net, vertical net and dense mesh net for high-altitude operation such as construction. The ground four-column loading frame uses the ground embedded parts 13 to be connected with the concrete floor in an integrated manner, and the conditions of the site ground can be used to solve the problems of the general detection test device due to insufficient rigidity, torque offset and unstable shaking of the device during the test process. The specifications and types of the safety net, safety belt and safety rope that can be detected cover the requirements in the relevant product standards. The present invention adopts the embedded concrete foundation to replace the existing ordinary ground foundation, and adopts the sunken buffer sand pool design, which reduces the risk of heavy objects or simulated people directly hitting the ground or the detection personnel during the falling process during the test process, improves the efficiency of sample installation, and also reduces the difficulty of operation. The actual floor area of ​​the present invention is only the ground four-column loading frame and the hanging part of the safety net, without occupying the indoor area, which greatly reduces the pressure of site use. The release device of the present invention adopts a remote control release system, and a special quick-connect connector is used between the connector and the heavy weight or the manikin. It can be quickly connected when in use, and can be quickly disassembled and moved to other locations when not in use, further improving the utilization rate and flexibility of the site. And because of the use of a movable quick-connect design, it can be disassembled and placed when not in use to facilitate daily maintenance. At the same time, the release device 4 is powered by a battery to avoid malfunctions and electricity risks caused by wire entanglement due to wired methods. The weight of the wire rope traction system of the present invention will not be applied to the safety net, safety belt, and safety rope. The control box 8 and its electrically connected electrical components adopt a standard design for outdoor and indoor use, which can be used in different detection environments.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for detecting the performance of a safety net, a safety belt, or a safety rope system, characterized in that: include: A ground four-column loading frame, wherein a first test hanging point and a second test hanging point are provided on the ground four-column loading frame, and the first test hanging point is connected to a first force sensor; The wire rope traction system includes a hoist, a pulley, a wire rope and a release device, wherein the pulley is arranged on a four-column loading frame on the ground, the wire rope is connected to the hoist and passes through the pulley, and the height position of the end of the wire rope can be adjusted within a certain height range under the drive of the hoist; the release device is connected to the end of the wire rope, and the end of the wire rope is also connected to a second force sensor; An electrical control system having a plurality of data communication ports, wherein the first force sensor, the hoist, and the second force sensor are all electrically connected to the electrical control system; A displacement sensor is arranged on the hoist and is electrically connected to the electrical control system. The displacement sensor is used to detect the displacement data of the end of the wire rope and transmit the detected displacement data to the electrical control system; The computer data acquisition and processing system is connected to the electrical control system for communication and is used to perform programmable control on each system and can collect data generated and received by the electrical control system.

2. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 1, characterized in that: The ground four-column loading frame includes an integral frame, a platform, a tensioning device and ground embedded parts. The integral frame and the tensioning device both include interconnected crossbeams, columns and diagonal braces. The ground embedded parts are embedded in the concrete floor. The integral frame and the tensioning device are connected to the ground embedded parts. The platform is arranged on the integral frame. The integral frame is provided with stairs leading to the platform. The first test hanging point is installed at the position of the platform.

3. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 2, characterized in that: The cross beams and columns of the ground four-column loading frame are both made of I-beams; the ground embedded parts include a plurality of I-beams, and the I-beams are connected by welding to form a grid structure.

4. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 1, characterized in that: The second test hanging point is located at a ground position vertically corresponding to the release device. The second test hanging point includes one or more lifting ring fixtures. When the second test hanging point is subjected to a tensile force of 20kN, the maximum displacement is less than 1mm.

5. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 1, characterized in that: A test pit is arranged at the center of the ground of the four-column loading frame. The test pit is located directly below the release device. The test pit is filled with sand to form a buffer sand pool.

6. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 5, characterized in that: The test pit is in the shape of a rectangular parallelepiped, with a length of not less than 2000 mm, a width of not less than 1500 mm, and a depth of not less than 1600 mm. The test pit is provided with steps leading from the bottom of the pit to the ground.

7. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 1, characterized in that: The release device comprises a storage battery and a wireless communication module. The storage battery is used to supply power to the release device, and the wireless communication module is communicatively connected with a remote controller.

8. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 1, characterized in that: The electrical control system includes a control box, which is arranged on a four-column loading frame on the ground. A fully digital measurement and control device is arranged in the control box. A force data communication port, a displacement data communication port, a transmission system control communication port and a computer data communication port are arranged on the control box; the first force sensor and the second force sensor are connected to the force data communication port through a data cable, the displacement sensor is connected to the displacement data communication port through a data cable, the hoist is connected to the transmission system control communication port through a data cable, and the computer data acquisition and processing system is connected to the computer data communication port through a data cable.

9. A device for detecting the performance of a safety net, a safety belt, and a safety rope system according to claim 1, characterized in that: The computer data acquisition and processing system includes computer hardware equipment and measurement and control software. The computer hardware equipment includes a host, a display and input and output equipment. The input and output equipment includes a mouse, a keyboard and a printer.

10. A detection method, characterized in that: Using the device for detecting the performance of a safety net, a safety belt, and a safety rope system as described in any one of claims 1 to 9, any one or more safety protection products among the safety net, the safety belt, and the safety rope are detected.

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