Safety control method of stay wire elbow locking device for wire installation

Abstract

The invention provides a safety control method of a stay wire elbow locking device for wire installation, and is suitable for the field of wire installation construction. The method comprises the steps of determining a matched stay wire elbow locking device, installing the stay wire elbow locking device, calculating the maximum tightening force, setting the maximum tightening force and conducting tightening force monitoring and early warning, the stay wire elbow locking device is adopted to replace a galvanized steel wire binding and winding mode, and the reliability of the stay wire elbow is improved; the tightening force of the stay wire is monitored through the force sensor in the stay wire elbow locking device, the maximum tightening force capable of being borne by the stay wire is set in the controller, and when the tightening force value reaches the maximum tightening force value, the controller triggers the alarm to warn that the stay wire is broken; meanwhile, the safety bend and the special rope clamp are arranged on the extension section of the stay wire, and when the special rope clamp is subjected to the force of the stay wire, the controller can trigger the alarm to warn that the stay wire has the risk of falling off; and the personnel and property safety in the surrounding environment is ensured.

Description

Technical Field

[0001] The present invention relates to the field of electric wire installation construction, and in particular to a safety control method of a wire elbow locking device used for electric wire installation. Background Art

[0002] During the construction of infrastructure such as power systems and communication lines, cable elbows are key components for connecting and supporting structures, and their safety and reliability are extremely important. Traditional cable elbow anchoring treatments typically involve the first section, gap, last section, lengthening, and head retention. This method involves wrapping and tying galvanized steel wire around the first and last sections to tighten the cable elbow. This not only requires a long length of cable, but is also highly dependent on the installation worker's proficiency. Unskilled installers not only spend longer time tightening the cable elbow, but also find it difficult to quantify the binding force, making it impossible to assess the firmness of the galvanized steel wire after tying.

[0003] If the galvanized steel wires are not securely tied, they can slip or even fall off when stressed, severely impacting not only power supply and communication networks but also potentially threatening the safety of people and property in the surrounding environment. Therefore, improving the safety and stability of cable elbow locking devices and minimizing the impact of human error has become a pressing issue. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the firmness of the traditional wire elbow anchoring treatment cannot be evaluated and the safety cannot be guaranteed. A safety control method for a wire elbow locking device for wire installation is proposed, which can make the wire elbow safer and more reliable, and the installation does not depend on the proficiency of the installer. Danger warnings can be issued during use, and can be widely used in the field of wire installation and construction.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A safety control method for a cable elbow locking device for electric wire installation, comprising the following steps:

[0007] S1. Determine the matching cable elbow locking device, including determining the diameter and material of the target cable to be used in the project, and then obtain the maximum tensile force N that the cable of the corresponding diameter and material can withstand under pure tension based on the factory qualification certificate of the target cable. f The maximum shear force Q that can be sustained when pure shear force is applied f , and select the matching cable elbow locking device according to the diameter and material of the target cable;

[0008] S2. Installing the cable elbow locking device, including inserting the cable through the threading hole of the cable elbow locking device, wrapping around the fixing member once, and then passing through the threading hole. After extending a certain length through the threading hole, the extended section is anchored by a wire clamping device. Then, according to the first angle measuring device and the second angle measuring device of the cable elbow locking device, an angle change α1 of the cable entry section after passing through the threading hole and an angle change α2 of the cable exit section after passing through the threading hole are obtained.

[0009] S3. Calculate the maximum tightening force, including the maximum tension N f , maximum shear force Q f Calculate the maximum clamping force F exerted by the cable elbow locking device that the cable can withstand based on the angle changes α1 and α2 i,max ;

[0010]

[0011] Where i is 1 or 2, F1 is the force measured by the first force sensor, F2 is the force measured by the second force sensor, and F 1,max is the maximum clamping force at the first force sensor, F 2,max is the maximum clamping force at the second force sensor;

[0012] S4, setting the maximum tightening force, including scaling the angle changes α1 and α2 according to the angle measurement ranges of the first angle measuring device and the second angle measuring device, and when the angle changes α1 and α2 reach the respective scale values, the first controller and the second controller in the cable elbow locking device are respectively triggered to modify the maximum tightening force corresponding to the angle changes α1 and α2;

[0013] S5. Tightening force monitoring and early warning, including real-time monitoring of the tightening force applied to the wire by the first force sensor at the contact surface between the wire entry bend section and the wire threading hole and the second force sensor at the contact surface between the wire exit bend section and the wire threading hole. When the tightening force monitored by the first force sensor and the second force sensor reaches their respective maximum tightening force F i,max When the first alarm and the second alarm in the cable elbow locking device are triggered respectively.

[0014] As a preferred technical solution of the present invention, in step S2, the wire clamping device includes a rope clamp and a special rope clamp, and 1 to 2 rope clamps are used to anchor the protruding section of the pull wire. After setting a safety bend, a special rope clamp is used for anchoring. The special rope clamp is composed of a third force sensor, a third controller and a third alarm. When the rope tension monitored in real time by the third force sensor exceeds a certain threshold T, the third alarm is triggered by the third controller.

[0015] As a preferred technical solution of the present invention, the threshold T is calculated based on 0.1 times the maximum tension N fGet the value.

[0016] As a preferred technical solution of the present invention, in step S4, the angle changes α1 and α2 are scaled, which includes evenly dividing the ranges (0, θ1) and (0, θ2) of the first angle measuring device and the second angle measuring device according to the graduation values ​​θ1 / n1 and θ2 / n2, wherein n1 and n2 are positive integers, and the graduation value θ i / n i Not more than 5 °; the corresponding angle change α1, α2 of the maximum tightening force is set to the maximum tightening force of the next scale, that is, when the angle change α i Reach j×θ i / n i When j is a positive integer less than n, the corresponding angle change is α i The maximum tightening force setting is shown in formula (2).

[0017]

[0018] Where, F i,max is the corresponding angle change α i The maximum tightening force.

[0019] The beneficial effects of the present invention are: a wire elbow locking device is adopted to replace the traditional manual binding and winding method of galvanized steel wire, which reduces the uncertainty influence of the installation workers during the anchoring process and improves the reliability of the wire elbow; the force sensor provided in the wire elbow locking device can monitor the tightening force of the wire in real time, and the maximum tightening force that the wire can withstand is set in the controller. When the monitored wire tightening force value reaches the maximum tightening force value, the controller will trigger the alarm to warn the surrounding personnel that the wire is at risk of breaking; at the same time, by providing a safety bend and a special rope clamp at the protruding section of the wire, when the special rope clamp is subjected to the force of the wire, it indicates that the wire has slipped after passing through the wire elbow locking device, and the controller will trigger the alarm to warn the surrounding personnel that the wire is at risk of falling off; the safety of people and property in the surrounding environment is guaranteed to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the anchoring treatment of the cable elbow of the present invention;

[0021] Figure 2 This is a flow chart of a safety control method for a wire elbow locking device used for wire installation according to the present invention;

[0022] Reference numerals in the figure: 1-pull wire, 2-pull wire elbow locking device, 3-pull wire elbow, 4-fixing component, 5-extending section, 6-rope clamp, 7-safety bend, 8-special rope clamp, 9-threading hole, 11-pull wire entry bend section, 12-pull wire exit bend section. DETAILED DESCRIPTION

[0023] The following describes in detail specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments provided herein are intended only to illustrate and explain the present invention and are not intended to limit the present invention. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other embodiments and variations thereof. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0024] In the first embodiment, a safety control method for a cable elbow locking device for cable installation is as follows:

[0025] S1. Determine the matching cable elbow locking device, including determining the diameter and material of the target cable to be used in the project, and then obtain the maximum tensile force N that the cable 1 of the corresponding diameter and material can withstand under pure tension based on the factory qualification certificate of the target cable. f The maximum shear force Q that can be sustained when pure shear force is applied f , and according to the diameter and material of the target cable, select the matching cable elbow locking device 2, the first controller and the second controller of the cable elbow locking device 2 set the maximum tension N that the target cable can withstand f and maximum shear force Q f Set as fixed values, and set the angle change α1 of the wire entry bend section 11 after passing through the wire threading hole 9 and the angle change α2 of the wire exit bend section 12 after passing through the wire threading hole 9 as variable parameters;

[0026] S2. Install the cable elbow locking device, including the cable 1 passing through the threading hole 9 of the cable elbow locking device 2, wrapping around the fixing member 4 once, and then passing through the threading hole 9. After extending out of the threading hole 9 for a certain length, the extended section 5 is anchored by a wire clamping device. The wire clamping device is composed of two rope clamps 6 and a safety bend 7. Then, according to the first angle measuring device and the second angle measuring device of the cable elbow locking device 2, the angle change α1 of the cable entry bend section 11 after passing through the threading hole 9 and the angle change α2 of the cable exit bend section 12 after passing through the threading hole 9 are obtained;

[0027] S3. Calculate the maximum hoop force, including the Tresca strength criterion and the tension analysis.

[0028]

[0029] Where N is the tension and shear force of the wire; the maximum tension N f , maximum shear force Q f Substitute the angle changes α1 and α2 into the above formula to calculate the maximum tightening force applied by the cable elbow locking device 2 that the cable 1 can withstand;

[0030]

[0031] Where i is 1 or 2, F1 is the force measured by the first force sensor, F2 is the force measured by the second force sensor, and F 1,max is the maximum clamping force at the first force sensor, F 2,max is the maximum clamping force at the second force sensor;

[0032] S4, setting the maximum tightening force, including scaling the angle changes α1 and α2 according to the angle measurement range of the first angle measuring device and the second angle measuring device, and when the angle changes α1 and α2 reach the respective scale values, the first controller and the second controller in the cable elbow locking device 2 are respectively triggered to modify the maximum tightening force corresponding to the angle changes α1 and α2;

[0033] The angle changes α1 and α2 are scaled by dividing the ranges (0, θ1) and (0, θ2) of the first angle measuring device and the second angle measuring device into uniform divisions according to graduation values ​​θ1 / n1 and θ2 / n2, wherein n1 and n2 are positive integers and the graduation value θ i / n i Not more than 5°; To ensure that the wire reaches the maximum tightening force, an early warning is given according to the angle change α i The larger the value is within the range (0,π / 2), the corresponding maximum tightening force F i,max The smaller the monotonically decreasing law, the maximum tightening force corresponding to the angle change α1, α2 is set to the maximum tightening force of the next scale, that is, when the angle change α i Reach j×θ i / n i When j is a positive integer less than n, the corresponding angle change is α i The maximum tightening force setting is shown in formula (4).

[0034]

[0035] Where, F i,max is the corresponding angle change α i The maximum tightening force.

[0036] S5, monitoring and early warning of the tightening force, including real-time monitoring of the tightening force applied to the wire by the first force sensor at the contact surface between the wire entry bend section 11 and the wire threading hole 9 and the second force sensor at the contact surface between the wire exit bend section 12 and the wire threading hole 9. When the tightening force monitored by the first force sensor and the second force sensor reaches their respective maximum tightening force F i,max When the first and second force sensors detect a tightening force less than their respective maximum tightening force F i,maxAfter that, the first alarm and the second alarm stop sounding.

[0037] The second embodiment is basically the same as the first embodiment, except that:

[0038] The wire clamping device includes a rope clamp and a special rope clamp. A rope clamp 6 is used to anchor the protruding section of the tension wire. After setting a safety bend 7, a special rope clamp 8 is used for anchoring. The special rope clamp 8 is composed of a third force sensor, a third controller and a third alarm. When the rope tension monitored in real time by the third force sensor exceeds a certain threshold T, the third alarm is triggered through the third controller; when the rope tension monitored in real time by the third force sensor is less than the threshold T again, the third alarm stops warning; the threshold T is determined according to the strong wind vibration or accidental impact load that the tension wire may be subjected to, and can be determined by the structural designer based on wind tunnel tests.

[0039] In a preferred embodiment of this embodiment, the threshold value T is calculated based on 0.1 times the maximum tension N. f Get the value.

[0040] In summary, the safety control method of the wire elbow locking device for wire installation of the present invention is safe, reliable and can provide early warning of danger in the field of wire installation construction.

[0041] It should be understood that the above embodiments are one or more embodiments of the present invention, and there are many other embodiments and variations thereof based on the present invention; the variations and modifications made by ordinary technicians in this industry through the present invention without making groundbreaking innovations all fall within the scope of protection of the present invention.

Claims

1. A safety control method for a cable elbow locking device for electric wire installation, characterized in that The specific steps include: S1. Determine the matching cable elbow locking device, including determining the diameter and material of the target cable to be used in the project, and then obtain the maximum tensile force N that the cable of the corresponding diameter and material can withstand under pure tension based on the factory qualification certificate of the target cable. f The maximum shear force Q that can be sustained when pure shear force is applied f , and select the matching cable elbow locking device according to the diameter and material of the target cable; S2. Installing the cable elbow locking device, including inserting the cable through the threading hole of the cable elbow locking device, wrapping around the fixing member once, and then passing through the threading hole. After extending a certain length through the threading hole, the extended section is anchored by a wire clamping device. Then, according to the first angle measuring device and the second angle measuring device of the cable elbow locking device, an angle change α1 of the cable entry section after passing through the threading hole and an angle change α2 of the cable exit section after passing through the threading hole are obtained. S3. Calculate the maximum tightening force, including the maximum tension N f , maximum shear force Q f and the angle changes α1 and α2 to calculate the maximum tightening force exerted by the cable elbow locking device that the cable can withstand; Where i is 1 or 2, F1 is the force measured by the first force sensor, F2 is the force measured by the second force sensor, and F 1,max is the maximum clamping force at the first force sensor, F 2,max is the maximum clamping force at the second force sensor; S4, setting the maximum tightening force, including scaling the angle changes α1 and α2 according to the angle measurement ranges of the first angle measuring device and the second angle measuring device, and when the angle changes α1 and α2 reach the respective scale values, the first controller and the second controller in the cable elbow locking device are respectively triggered to modify the maximum tightening force corresponding to the angle changes α1 and α2; S5. Tightening force monitoring and early warning, including real-time monitoring of the tightening force applied to the wire by the first force sensor at the contact surface between the wire entry bend section and the wire threading hole and the second force sensor at the contact surface between the wire exit bend section and the wire threading hole. When the tightening force monitored by the first force sensor and the second force sensor reaches their respective maximum tightening force F i,max When the first alarm and the second alarm in the cable elbow locking device are triggered respectively.

2. The safety control method for the cable elbow locking device for electric wire installation according to claim 1, characterized in that: In step S2, the wire clamping device includes a rope clamp and a special rope clamp. 1 to 2 rope clamps are used to anchor the protruding section of the pull wire. After setting a safety bend, a special rope clamp is used for anchoring. The special rope clamp is composed of a third force sensor, a third controller and a third alarm. When the rope tension monitored in real time by the third force sensor exceeds a certain threshold T, the third alarm is triggered by the third controller.

3. The safety control method for the cable elbow locking device for electric wire installation according to claim 2, characterized in that: The threshold T is calculated based on 0.1 times the maximum tension N. f Get the value.

4. The safety control method for a cable elbow locking device for electric wire installation according to claim 1, characterized in that: In step S4, the angle changes α1 and α2 are scaled by dividing the ranges (0, θ1) and (0, θ2) of the first angle measuring device and the second angle measuring device into uniform divisions according to the graduation values ​​θ1 / n1 and θ2 / n2, wherein n1 and n2 are positive integers, and the graduation value θ i / n i Not more than 5 °; the corresponding angle change α1, α2 of the maximum tightening force is set to the maximum tightening force of the next scale, that is, when the angle change α i Reach j×θ i / n i When j is less than n i A positive integer corresponding to an angle change of α i The maximum tightening force setting is shown in formula (2). Where, F i,max is the corresponding angle change α i The maximum tightening force.

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