System performance detection device for safety net, safety belt and safety rope

Abstract

The utility model discloses a system performance detection device for a safety net, a safety belt and a safety rope, which comprises a storage rack for bearing an object to be detected and a test rack for releasing impact force, and is characterized in that a tensioning structure for bearing a test simulation weight is arranged on the surface of the storage rack; a test platform is arranged in the middle of the test frame, a release structure is arranged at the top of the test frame through a steel wire rope, a first test hanging point is arranged above the test platform, and a second test hanging point is arranged at the position, corresponding to the release structure, in the storage rack. The system performance detection device for the safety net, the safety belt and the safety rope has the advantages of being high in universality, high in test efficiency and small in occupied area.

Description

Technical Field

[0001] The utility model relates to the technical field of performance detection of safety protection products, in particular to a system performance detection device for safety nets, safety belts and safety ropes. Background Art

[0002] Safety nets, safety belts, and safety ropes are widely used in construction projects, industrial production, high-altitude operations, and other engineering sites that need to protect construction workers from accidental falls or falling objects. Their system performance indicators are an important basis for safe production and construction. These include 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 for judging 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 the corresponding products with fixed nodes to generate dynamic and static loads. Common detection standards include GB / T 6096-2020, GB 24543-2009, and GB 5725-2009.

[0003] With the continuous development of production technology for safety nets, safety belts and safety ropes and the continuous improvement of national policies on production safety protection, the safety nets, safety belts and safety ropes produced in the industry have developed from the original single specifications and functions to a variety of specifications and products suitable for a variety of application environments. Based on the current development status of the industry, the existing simple brackets with wire rope traction and other loading methods have major defects and limitations in the detection of the performance of safety nets, safety belts and safety rope systems. The defects and limitations of the existing technology are mainly reflected in:

[0004] First, common 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.

[0005] Second, the common safety rope testing equipment on the market all use conventional tensile testing machines to generate loads. The instruments are generally reaction frame base structure, the pressure base of the instrument is small and fixed, mainly for the testing of small specimens, and it is difficult to achieve the measurement of products of various specifications. Its form cannot meet the needs of combined linkage testing of safety belts, safety ropes, etc.

[0006] Third, there is a lack of testing equipment that integrates the performance testing of safety nets, safety belts, and safety rope systems.

[0007] The above problems have seriously restricted the development of engineering applications and testing scientific research in the fields of safety nets, safety belts and safety ropes. Utility Model Content

[0008] The utility model aims to provide a system performance detection device for safety nets, safety belts and safety ropes, which has the characteristics of strong versatility, high testing efficiency and small footprint.

[0009] The utility model can be realized by the following technical solutions:

[0010] The utility model discloses a system performance detection device for a safety net, a safety belt and a safety rope, comprising a storage rack for carrying items to be tested and a test rack for releasing impact force, characterized in that a tensioning structure for carrying a test simulated heavy object is arranged on the surface of the storage rack, a test platform is arranged in the middle of the test rack, a release structure is arranged on the top of the test rack through a steel wire rope, a first test hanging point is arranged above the test platform, and a second test hanging point is arranged at a position corresponding to the release structure inside the storage rack.

[0011] Furthermore, the storage rack is fixed on the concrete floor through embedded parts.

[0012] Furthermore, the other end of the wire rope is displacement-controlled by a hoist.

[0013] Further, the release structure can be released by remote control, and the release structure is equipped with a horizontal rod.

[0014] Furthermore, a first stress sensor is provided at the first test hanging point, a second stress sensor is provided at the release structure, and a displacement sensor is provided at the hoist.

[0015] Furthermore, the detection device also includes a controller, and the controller is arranged on the storage rack or the test rack.

[0016] Furthermore, an inclined ladder for maintenance and operation is provided inside the test frame, and the inclined ladder is multi-fold and respectively connected to the test platform, the first test hanging point, and the second test hanging point.

[0017] Furthermore, a buffer sand pool is provided at the contact point between the storage rack and the ground, the buffer sand pool is provided with a movable metal cover, and the second test hanging point is provided on the movable metal cover.

[0018] Furthermore, the second test hanging point is provided with a plurality of test hanging rings.

[0019] The utility model provides a system performance detection device for safety nets, safety belts and safety ropes, which has the following beneficial effects:

[0020] First, it has strong versatility. It can not only be used for dynamic and static load tests of fence operation safety belts, 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. That is: simulated heavy objects and penetrating falling objects are allowed to fall freely into the test net from a specified height, and the impact resistance and penetration resistance of the safety net are judged according to the degree of damage.

[0021] Second, the test efficiency is high. In the utility model, the time for sample installation is greatly saved, and the operation difficulty is also reduced. In addition, a remote control release method is adopted, and a quick-connect connector is used between the connector and the heavy weight or the simulated person. 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. Due to the use of a movable quick-connect design, it can be disassembled and placed when not in use to facilitate daily maintenance.

[0022] Third, it occupies less area. The test device of the utility model actually occupies only the four-post storage rack, the test rack and the safety net hanging part, and does not need to occupy indoor area, which greatly reduces the pressure of site use.

[0023] Fourth, the operation is controllable and accurate. The wire rope traction transmission adopts an integrated connection design, and the weight of the transmission structure will not be applied to the safety net, safety belt, and safety rope, ensuring the accuracy of the test; the wire rope traction transmission adopts an automatic lifting function, which can adjust the relative position between the release point and the test hanging point according to the test needs, with high flexibility; the static force is automatically controlled by a microcomputer single-chip microcomputer and a servo motor, the force value is automatically constant, and the test holding time can be set by itself to ensure the controllability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 This is a schematic diagram of the overall structure of a system performance detection device for a safety net, a safety belt, and a safety rope according to the utility model;

[0025] The marks in the accompanying drawings include: a storage rack 1, a hoist 2, a test platform 3, a release structure 4, a first stress sensor 5, a tensioning structure 6, a wire rope 7, a controller 8, a first test hanging point 9, a second test hanging point 10, a displacement sensor 11, a second stress sensor 12, an embedded part 13, and a concrete floor 14. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with embodiments.

[0027] The utility model discloses a system performance detection device for safety nets, safety belts and safety ropes, comprising a rack 1 for carrying items to be tested and a test rack for releasing impact force, characterized in that: a tensioning structure 6 for carrying a test simulated heavy object is arranged on the surface of the rack 1, a test platform 3 is arranged in the middle of the test rack, a release structure 4 is arranged on the top of the test rack through a steel wire rope 7, a first test hanging point 9 is arranged above the test platform 3, and a second test hanging point 10 is arranged at a position corresponding to the release structure 4 inside the rack 1.

[0028] In the utility model, the end of the release structure 4 is equipped with a remote control release controller 8, and a quick-connect connector is used between the connector and the test weight or the simulated person. It can be quickly connected when in use, and can be quickly disassembled when not in use and moved to other locations for placement, thereby improving the utilization rate and flexibility of the experimental site. Due to 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 structure 4 is equipped with a horizontal rod, which is composed of two vertical uprights and a horizontal rod that can be translated up and down, to keep the release structure 4 vertically downward.

[0029] Furthermore, the rack 1 is fixedly arranged on the concrete floor 14 by means of embedded parts 13. Specifically, the embedded parts 13 need to be 1420 mm above the concrete floor, and the embedded parts 13 are connected to the test frame and the rack 1 by welding or bolts, etc., to form a cage-type self-balancing reaction frame structure, which effectively saves the test space.

[0030] Furthermore, the other end of the steel wire rope 7 is displacement-controlled by the hoist 2 .

[0031] Furthermore, the first test hanging point 9 is provided with a first stress sensor 5, the release structure 4 is provided with a second stress sensor 12, and the hoist 2 is provided with a displacement sensor. By providing a plurality of sensors, the sensors can be electrically connected with the force value data communication port, the displacement value data communication port, the control communication port, the computer data port and the full digital measurement and control device, thereby providing the possibility of realizing programmable control by the computer.

[0032] Furthermore, the detection device also includes a controller 8, and the controller 8 is arranged on the storage rack 1 or the test rack.

[0033] Furthermore, an inclined ladder for maintenance and operation is provided inside the test frame, and the inclined ladder is multi-folded and connected to the test platform 3, the first test hanging point 9, and the second test hanging point 10 respectively.

[0034] Furthermore, a buffer sand pool is provided at the contact point between the rack 1 and the ground, and a movable metal cover is provided on the buffer sand pool, and the second test hanging point 10 is provided on the movable metal cover. In the utility model, the buffer sand pool is used for fall test buffering, and its depth dimension meets the maximum fall height requirement.

[0035] Furthermore, the second test hanging point 10 is provided with a plurality of test hanging rings. In the present invention, the number of the test hanging rings can be selected according to the test requirements, and the maximum displacement of the hanging point is less than 1 mm when it is subjected to a force of 20 kN.

[0036] In the utility model, according to the performance standard of the safety belt, a manikin of standard limit weight is selected, the safety belt is installed on the manikin, and then the manikin head ring is connected to the remote control release structure, and then the safety belt is connected to the tether and the test hanging point, and the manikin is released by the remote control device, and the safety belt can be tested; targeted performance testing can be carried out according to the manufacturing indicators of the safety belt, the use is convenient, manpower is saved, and at the same time, the sudden breakage of the safety belt can be avoided to avoid injuries to the testing personnel, and the utility model is highly practical.

[0037] In the utility model, according to the performance standard of the safety rope, a standard test weight is selected, the two ends of the safety rope are respectively connected to the test hanging point and the test weight, and then the test weight is connected to the remote control release structure. The test weight is released by the remote control device to test the safety rope; a suitable loading speed can be selected according to the standard for static mechanical testing; targeted performance testing can be performed according to the manufacturing indicators of the safety rope. It is easy to use and saves manpower. At the same time, it avoids injuries to testers caused by sudden breakage of the safety belt, and has strong practicality.

[0038] In the utility model, according to the performance standard of the safety net, a standard test weight is selected, the safety net is fixed on the tensioning device, and then the test weight is connected to the remote control release structure. The test weight is released by the remote control device to test the safety net; targeted performance testing can be performed according to the manufacturing indicators of the safety rope. It is easy to use and saves manpower. At the same time, it avoids injuries to testing personnel caused by sudden breakage of the safety belt, and has strong practicality.

[0039] Example 1 Test steps for testing a restricted-use safety belt containing only a tether and a safety line

[0040] 1-1) Put the strap on the simulator according to the product instructions, and then fix the simulator to the second test hanging point on the ground;

[0041] 1-2) Connect the safety rope to the lanyard according to the product manual;

[0042] 1-3) Mark the edges of all adjustment buckles on the laces;

[0043] 1-4) Take a safety rope of (1000±10) mm and connect it to the loading device;

[0044] 1-5) Start the loading device, pre-tighten it appropriately, and measure the length of the safety rope;

[0045] 1-6) Start the loading device and apply a load of (15+0.3) kN, maintaining the load for at least 3 min;

[0046] 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.

[0047] Example 2 Steps in testing a fall-hanging safety belt containing a lanyard, a double-tail safety rope and a buffer

[0048] 1-1) Wear the strap on the simulator according to the product instructions and connect the simulator head ring to the remote control release device;

[0049] 1-2) Connect the safety rope and buffer to the lanyard and the first test hanging point respectively according to the product manual. If the length of the safety rope is adjustable, adjust the length of the safety rope to the maximum length;

[0050] 1-3) Mark the edges of all adjustment buckles on the laces;

[0051] 1-4) Lift the manikin to a point where the connection point between the harness 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;

[0052] 1-5) Release the simulator and record the peak impact force of the seat belt while the simulator is in suspension;

[0053] 1-6) 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;

[0054] 1-7) Unload and adjust the laces, and re-mark the edges of all adjustment buckles of the laces;

[0055] 1-8) 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;

[0056] 1-9) Connect the simulator hip ring to the release device, lift the simulator 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;

[0057] 1-10) 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 over.

[0058] Example 3 Steps in testing the static mechanical properties of a safety rope

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

[0060] 1-2) Start the wire rope transmission device 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 100 mm / min, and the wire rope and chain safety ropes should not exceed 30 mm / min;

[0061] 1-3) 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 over.

[0062] Example 4 Steps in testing the impact resistance of safety nets

[0063] 1-1) Fix the safety net on the tensioning device;

[0064] 1-2) Install the test weight on the release device;

[0065] 1-3) Lift the test weight to the specified height (test height: 7 m for flat net; 2 m for vertical net;

[0066] A-grade dense mesh is 1.8 m; B-grade dense mesh is 1.2 m);

[0067] 1-4) Release the test weight, observe the sample condition, and the test is complete.

[0068] In the utility model, the ground platform is integrated with the embedded concrete foundation. This design can utilize the conditions of the site ground to solve the problems of general test equipment due to insufficient rigidity, torque offset and unstable shaking of the equipment during the test. The specifications and types of safety nets, safety belts and safety ropes that can be detected cover the requirements of relevant product standards.

[0069] In the utility model, a pre-embedded concrete foundation is used to replace the existing ordinary ground foundation, and a sunken buffer sand pool design is adopted to reduce the risk of heavy objects or simulated people directly hitting the ground or test personnel during the falling process during the test.

[0070] In the utility model, the release structure can be powered by a battery, thereby avoiding malfunctions and electricity risks caused by entanglement of wires due to the use of wires.

[0071] In the utility model, the wire rope traction transmission adopts an integrated connection design of the sensor, wire rope and loading frame, and the weight of the wire rope traction transmission structure will not be applied to the safety net, safety belt and safety rope, thereby ensuring the accuracy of the test.

[0072] In the utility model, the wire rope traction transmission adopts an automatic lifting function (with real-time height display), and the relative position between the release point and the test hanging point can be adjusted according to the test needs, which has high flexibility.

[0073] In the utility model, the static force is automatically controlled by a microcomputer single chip and a servo motor, the force value is automatically constant, and the test holding time can be set by itself to ensure the controllability of the operation.

[0074] In the utility model, the control box and the external electrical controller adopt a standard design for outdoor and indoor use, and can be suitable for different detection environments.

[0075] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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.

[0078] The above embodiments are only specific embodiments of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims

1. A system performance testing device for safety nets, safety belts, and safety ropes, comprising a rack for carrying items to be tested and a test rack for releasing impact force, characterized in that: The surface of the rack is provided with a tensioning structure for carrying a test simulated heavy object, a test platform is provided in the middle of the test rack, a release structure is provided on the top of the test rack through a steel wire rope, a first test hanging point is provided above the test platform, and a second test hanging point is provided inside the rack at a position corresponding to the release structure.

2. The system performance detection device for safety nets, safety belts and safety ropes according to claim 1, characterized in that: The storage rack is fixed on the concrete floor through embedded parts.

3. The system performance detection device for safety nets, safety belts and safety ropes according to claim 2 is characterized in that: The other end of the steel wire rope is displaced by a hoist.

4. The system performance detection device for safety nets, safety belts and safety ropes according to claim 3 is characterized in that: The first test hanging point is provided with a first stress sensor, the release structure is provided with a second stress sensor, and the hoist is provided with a displacement sensor.

5. The system performance detection device for safety nets, safety belts and safety ropes according to claim 4, characterized in that: The detection device also includes a controller, which is arranged on a storage rack or a test rack.

6. The system performance detection device for safety nets, safety belts, and safety ropes according to claim 5, characterized in that: The test frame is provided with an inclined ladder for maintenance and operation inside, and the inclined ladder is multi-folded and respectively connected with the test platform, the first test hanging point, and the second test hanging point.

7. The system performance detection device for safety nets, safety belts, and safety ropes according to claim 6, characterized in that: A buffer sand pool is provided at the contact point between the storage rack and the ground, the buffer sand pool is provided with a movable metal cover, and the second test hanging point is provided on the movable metal cover.

8. The system performance detection device for safety nets, safety belts, and safety ropes according to claim 7, characterized in that: The second test hanging point is provided with a plurality of test hanging rings.

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