Steel strand straightness detection device

Abstract

The utility model relates to the technical field of steel strand performance detection, in particular to a steel strand straightness detection device. The steel strand straightness detection device comprises a supporting plate, and a placing position for placing the steel strand is formed on the supporting plate. The supporting plate is provided with a plurality of detection positions, the multiple detection positions are arranged at intervals in the length direction of the supporting plate, each detection position is provided with a distance measuring piece, and the distance measuring pieces are used for measuring the distance between the detection positions and the steel strand. The supporting plate is provided with a display screen which is electrically connected with the distance measuring part. With the adoption of the device, the detection operation of the straightening performance of the steel strand can be effectively simplified, the accuracy of a detection value is ensured, and the test efficiency and the result reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel strand performance detection technical field especially relates to a steel strand straightness detection device. BACKGROUND

[0002] In the detection of steel strand for prestressed concrete, the straightness of steel strand is an important index, and the steel strand with good straightness can better ensure the application effect of prestress and improve the safety and durability of structure. When detecting the straightness of steel strand, only some simple tools and methods can be used for rough measurement, for example, the steel strand is placed on a plane, and the arch height of the steel strand is measured by a ruler or other detection gauges. However, in actual test operation, it is difficult to accurately measure the straightness of the steel strand by relying on simple tools, repeated measurement and reading are required, which leads to a complicated measurement process and reduces the measurement efficiency. SUMMARY

[0003] The utility model discloses a steel strand straightness detection device can effectively simplify the detection operation of steel strand straightness, and ensure the accuracy of detection value, improve the test efficiency and result reliability.

[0004] In order to solve the above technical problems, the utility model provides a steel strand straightness detection device, including the support plate, the support plate is formed with the placement site for placing the steel strand;

[0005] The support plate is provided with a plurality of detection sites, a plurality of detection sites are arranged along the length direction of the support plate, and each detection site is provided with a distance measuring element, and the distance measuring element is used for measuring the distance between the detection site and the steel strand;

[0006] The support plate is provided with a display screen, and the display screen is electrically connected with the distance measuring element.

[0007] As an improvement of the above scheme, the placement site forms a preset length, and the cutting length of the steel strand is the same as the preset length.

[0008] As an improvement of the above scheme, the placement site is a steel pipe connected to both ends of the support plate, the top surface of the steel pipe is flush with the top surface of the support plate, and the preset length is the length of the steel pipe.

[0009] As an improvement of the above scheme, a preset interval is formed between any two adjacent detection sites;

[0010] The remaining one detection site is located at the center of the support plate, and the remaining detection sites are symmetrically distributed on both sides of one of the detection sites.

[0011] As the improvement of the above-mentioned scheme, the two ends of the support plate are provided with leveling members, and the leveling members are located below the placing position, and the leveling members are used for adjusting the levelness of the support plate.

[0012] As the improvement of the above-mentioned scheme, the leveling member comprises a support base, a leveling screw and a fixing nut, the top end of the leveling screw is threadedly connected to the bottom surface of the support plate, the support base is fixedly connected to the bottom end of the leveling screw, and the fixing nut is threadedly connected with the leveling screw.

[0013] As the improvement of the above-mentioned scheme, the top surface of the support plate is provided with a level.

[0014] As the improvement of the above-mentioned scheme, the thickness of the support plate is 20-30 mm, and the width of the support plate is the same as the width of the placing position.

[0015] As the improvement of the above-mentioned scheme, the top surface of the support plate forms a preset flatness, and the preset flatness is less than ±0.1 mm.

[0016] As the improvement of the above-mentioned scheme, the two ends of the support plate are provided with support columns, and the support columns are telescopic rods.

[0017] The utility model discloses, has the following beneficial effect:

[0018] According to the steel strand straightness detection device, the steel strand is placed on the placing position of the support plate, and the steel strand is ensured to naturally droop and not contact other parts of the support plate, so that the steel strand presents a certain bending shape under the action of its own gravity. At this time, the distance between the detection position and the steel strand is measured by the plurality of distance measuring members, a plurality of distance data between the steel strand and the measuring point are obtained, and then the display screen is used to process and display the plurality of measurement data, so that the accurate data of the steel strand straightness sag is obtained. Therefore, by using the utility model, the detection operation of the steel strand straightness can be effectively simplified, the measurement error is reduced, the accuracy of the detection value is ensured, and the test efficiency and the result reliability are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the main view structural schematic diagram of the steel strand straightness detection device in an embodiment of the utility model;

[0020] Figure 2 is the plan view structural schematic diagram of the steel strand straightness detection device in an embodiment of the utility model;

[0021] Figure 3 is Figure 2 the enlarged structural schematic diagram of A in the figure. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be described in further detail below in combination with the drawings. It is hereby declared that the up, down, left, right, front, back, inner and outer directions appearing or about to appear in the text of the utility model are based on the drawings of the utility model only, which is not a specific limitation on the utility model.

[0023] The steel strand straightness detection device can effectively simplify the detection operation of the straightness of the steel strand 7, ensure the accuracy of the detection value, improve the test efficiency and result reliability.

[0024] In an embodiment of the utility model, as shown in the figure, Figures 1 to 3 The steel strand straightness detection device comprises a support plate 1, and the support plate 1 is formed with a placement position 2 for placing the steel strand 7. The support plate 1 is provided with a plurality of detection positions, the plurality of detection positions are arranged at intervals along the length direction of the support plate 1, and each detection position is provided with a distance measuring element 3 for measuring the distance between the detection position and the steel strand 7. The support plate 1 is provided with a display screen 4, and the display screen 4 is electrically connected with the distance measuring element 3.

[0025] According to the steel strand straightness detection device of the embodiment, when the straightness of the steel strand 7 is detected, the steel strand 7 can be placed on the placement position 2 of the support plate 1, and the natural droop of the steel strand 7 is ensured, and the steel strand 7 does not contact other parts of the support plate 1, so that the steel strand 7 presents a certain bending shape under the action of its own gravity. At this time, the distance between the detection position and the steel strand 7 is measured by the plurality of distance measuring elements 3, so that a plurality of distance data between the steel strand 7 and the measuring point can be obtained, and then the plurality of measurement data are processed and displayed by the display screen 4, so that the accurate data of the straightness of the steel strand 7 can be obtained. Therefore, by using the utility model, the detection operation of the straightness of the steel strand 7 can be effectively simplified, the measurement error can be reduced, the accuracy of the detection value can be ensured, and the test efficiency and result reliability are improved.

[0026] It should be noted that the distance measuring element 3 is preferably an infrared distance measuring instrument, and the measurement accuracy thereof can reach ±0.1 mm, so as to provide accurate measurement data for the straightness detection of the steel strand 7. The infrared distance measuring instrument is fixed to the support plate 1 by a mounting bracket, and the mounting bracket is made of aluminum alloy, so as to utilize the good rigidity and light weight characteristics of the aluminum alloy, and ensure the connection strength between the mounting bracket and the support plate 1.

[0027] Of course, the distance measuring element 3 can also be a laser displacement sensor, which has excellent measurement accuracy and response speed, and can also accurately measure the displacement change of the steel strand 7. However, the laser displacement sensor has strict requirements on the environment, and may be disturbed in a strong light environment, so that corresponding protection measures need to be taken.

[0028] It should be noted that the display screen 4 adopts a liquid crystal display screen (LCD) and can clearly display the measurement data. The display screen 4 is installed on one side of the plurality of infrared distance meters and is connected with the infrared distance meters through a data line to implement display of the distance data measured. Moreover, the display screen 4 has a data storage function and can store at least 100 groups of measurement data, facilitating subsequent viewing and analysis. Meanwhile, the display screen 4 can also display statistical information such as the maximum value and the minimum value of the measurement as well as the working state and operation indication of the equipment.

[0029] In addition, according to the GB / T 21839-2019 specification, the length of the steel strand 7 to be cut for the straightness test of the steel strand should be greater than 1 m, but the same length standard is not specified. Therefore, in actual tests, different test personnel or laboratories may use different lengths of the steel strand 7 for testing, resulting in a lack of comparability of the test results.

[0030] To improve the comparability of the detection data of the steel strand straightness detection device, in the embodiment, the placement position 2 has a preset length, and the length of the steel strand 7 to be cut is the same as the preset length. The test personnel need to cut the steel strand 7 according to the preset length of the placement position 2 to take the steel strand 7 with the same test length for straightness detection. The length of the steel strand 7 to be cut is unified, so that more consistent and reliable test results are obtained, and the comparability of the test results is effectively improved.

[0031] Preferably, the preset length of the placement position 2 is 2 m, that is, the length of the steel strand 7 to be measured is 2 m, so as to ensure the standardization of the test conditions and improve the comparability of the test results. When cutting the steel strand 7 to be measured, a steel tape can be used to accurately cut a 2-m-long steel strand 7 sample.

[0032] Specifically, as shown in Figure 1 and Figure 2 The placement position 2 is a steel pipe 21 connected to both ends of the support plate 1. The top surface of the steel pipe 21 is flush with the top surface of the support plate 1, and the preset length is the length of the steel pipe 21. The structural difference between the steel pipe 21 and the support plate 1 is utilized to enhance the obviousness of the placement position 2 on the support plate 1, so as to ensure that the positions of the steel strand 7 placed by different test personnel are consistent, thereby further improving the comparability and accuracy of the test results. Meanwhile, the top surface of the steel pipe 21 flush with the top surface of the support plate 1 ensures smooth transition of the connection part between the support plate 1 and the steel pipe 21, avoiding the concave-convex connection part between the steel pipe 21 and the support plate 1, which affects the distance measurement accuracy of the distance measuring piece 3 on the steel strand 7.

[0033] The diameter of the steel pipe 21 is 30 mm, which is made of stainless steel and is subjected to quenching treatment on the surface to ensure that the hardness of the steel pipe 21 reaches HRC50-55, thereby improving the wear resistance and stiffness of the steel pipe 21. The upper surface of the steel pipe 21 is welded to the top surface of the support plate 1, and the welding position is polished to ensure smooth transition of the welding position.

[0034] As shown in the embodiment, Figure 1 The preset interval between any two adjacent detection positions is preferably 10 mm, ensuring that the distance between the nearest ranging device 3 at both ends of the placement position 2 and the placement position 2 has a certain detection distance.

[0035] The preset interval between any two adjacent detection positions is preferably 10 mm, ensuring that the distance between the nearest ranging device 3 at both ends of the placement position 2 and the placement position 2 has a certain detection distance.

[0036] As shown in the embodiment, Figure 2 and Figure 3 The two ends of the support plate 1 are provided with leveling devices 5, and the leveling devices 5 are located below the placement position 2. The leveling devices 5 are used to adjust the levelness of the support plate 1. By adjusting the levelness of the surface of the support plate 1, it is ensured that the ranging device 3 and the steel strand 7 of the placement position 2 above the support plate 1 can be located on the same horizontal plane, so that the measurement data obtained by the ranging device 3 can accurately represent the straightness of the steel strand 7, further improving the data reliability of the straightness detection of the steel strand 7.

[0037] Specifically, as shown in the embodiment, Figure 2 and Figure 3 The leveling screw 52 is threadedly connected to the bottom surface of the support plate 1, the support base 51 is fixedly connected to the bottom end of the leveling screw 52, and the fixed nut 53 is threadedly connected to the leveling screw 52. Before the straightness test of the steel strand 7 is performed, the support plate 1 can be placed on a horizontal ground and supported by the support base 51, and then the leveling screw 52 is rotated to level the support plate 1, ensuring the levelness of the support plate 1. Then the leveling screw 52 is locked by the fixed nut 53 to prevent the support plate 1 and the leveling screw 52 from loosening and damaging the levelness of the support plate 1 during the test.

[0038] More specifically, in order to accurately determine whether the levelness of the support plate 1 during leveling meets the requirements, the top surface of the support plate 1 is provided with a level meter. When adjusting the leveling device 5, the leveling device 5 and the level meter are used to ensure that the levelness error of the support plate 1 after leveling is not more than ±0.1°, improving the accuracy of leveling the support plate 1. At the same time, when performing the straightness test of the steel strand 7, the real-time levelness of the support plate 1 can be determined by the level meter to ensure that the support plate 1 is level when obtaining the detection data, further improving the reliability of the detection data.

[0039] In this embodiment, the thickness of the support plate 1 is 20-30 mm, so as to ensure that the support plate 1 has sufficient strength and stability, and avoid affecting the reliability of the detection data due to shaking of the support plate 1 during the straightness detection test. The width of the support plate 1 is the same as the width of the placement position 2.

[0040] Further, the top surface of the support plate 1 forms a preset flatness, and the preset flatness is less than ±0.1 mm, so as to ensure that the top surface of the support plate 1 has no obvious concave-convex, distortion or local deformation, and avoid affecting the distance measurement of the distance measuring part 3 on the steel strand 7 in the placement position 2. In this embodiment, the support plate 1 is a steel plate made of high-quality carbon structural steel, and the upper surface thereof is subjected to finishing treatment, so as to ensure that the surface flatness error of the steel plate is not more than ±0.1 mm.

[0041] Of course, the support plate 1 can also be made of stainless steel or other materials, which can be selected according to actual needs.

[0042] Preferably, the length of the support plate 1 is 1000 mm, and when the width of the placement position 2 is 200 mm, the width of the support plate 1 is also 200 mm. Five detection positions in a straight line are arranged at the position of 0.5 m on the upper surface of the support plate 1, wherein the central detection position is located at the center of the support plate 1, that is, the distance between the central detection position and the placement position 2 at both ends of the support plate 1 is 500 mm; the remaining four detection positions are symmetrically arranged on both sides of the central detection position, and the distance between any two adjacent detection positions is 10 mm.

[0043] In this embodiment, as shown in Figure 2 The both ends of the support plate 1 are provided with support columns 6, and the support columns 6 are telescopic rods, so as to adjust the telescopic height of the telescopic rods according to actual needs, correspondingly adjust the height of the top surface of the support plate 1, and realize the adaptability of the steel strand straightness detection device.

[0044] When the steel strand straightness detection device is used to detect the straightness of the steel strand 7, the specific working process is as follows:

[0045] The support plate 1 is placed on the horizontal ground through the support columns 6, and is supported through the support columns 6; then the leveling screw 52 is adjusted, and the level is used to ensure that the top surface of the support plate 1 is horizontal, and the horizontal error is not more than ±0.1°. Then the multi-point infrared distance meter and the display screen 4 are installed on the support plate 1, and the position and angle of the infrared distance meter are adjusted, so that the five infrared distance meters accurately align the measurement positions, and then the zero point and the measurement accuracy of the infrared distance meter are calibrated, so as to ensure that the measurement data is accurate and reliable. Then the display screen 4 and the infrared distance meter are connected through the data line, and then the power supply is connected, and the equipment self-checking is performed.

[0046] After the overall installation of the detection device is completed, a 2m long steel strand 7 sample is cut using a steel tape, and the steel strand 7 sample is slowly placed on the two end steel plates of the support plate 1, so as to avoid the steel strand 7 from being stretched or twisted by external force, and to ensure that the steel strand 7 naturally droops. Then, the lamp strip infrared range finder completes the measurement, reads the maximum value of the straightness sag h displayed on the display screen 4, and records the measurement result of this time. Then, the above detection operation is repeated to complete the measurement of multiple steel strand 7 samples, wherein each sample is measured three times, and the maximum value is taken as the final measurement result, so as to improve the accuracy of the measurement.

[0047] The steel strand straightness detection device of the embodiment clearly defines the experimental length of the steel strand 7 through the placement position 2, and cooperates with the accurate multi-point infrared range finder, so that the measurement result is accurate and reliable, and the comparability between different samples and tests is enhanced. In addition, the operation process is simplified, the automatic measurement and data processing function can reduce the manual operation time and error, and the test efficiency is effectively improved.

[0048] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the protection scope of the present application.

Claims

1. A device for detecting the straightness of steel strands, characterized in that, The support plate is provided with a plurality of detection positions which are arranged at intervals along the length direction of the support plate, and each detection position is provided with a distance measuring element for measuring the distance between the detection position and the steel strand. The support plate is provided with a display screen which is electrically connected with the distance measuring element. The placement position is formed with a preset length, and the cutting length of the steel strand is the same as the preset length.

2. The steel strand straightness detection device according to claim 1, characterized by The placement position is a steel pipe connected to both ends of the support plate, the top surface of the steel pipe is flush with the top surface of the support plate, and the preset length is the length of the steel pipe.

3. The steel strand straightness detection device according to claim 2, characterized by Any two adjacent detection positions form a preset interval.

4. The steel strand straightness detection device according to claim 1, characterized by The remaining detection positions are symmetrically distributed on both sides of one of the detection positions. Both ends of the support plate are provided with leveling elements which are located below the placement position, and the leveling elements are used to adjust the levelness of the support plate.

5. The steel strand straightness detection device according to claim 1, wherein The leveling element includes a support base, a leveling screw and a fixed nut, the top end of the leveling screw is threadedly connected to the bottom surface of the support plate, the support base is fixedly connected to the bottom end of the leveling screw, and the fixed nut is threadedly connected to the leveling screw.

6. The steel strand straightness detection device according to claim 5, wherein The top surface of the support plate is provided with a level.

7. The steel strand straightness detection device according to claim 5, wherein The thickness of the support plate is 20-30mm, and the width of the support plate is the same as the width of the placement position.

8. The steel strand straightness detection device according to claim 1, wherein The top surface of the support plate is formed with a preset flatness, and the preset flatness is less than ±0.1mm.

9. The device for detecting straightness of a steel strand according to claim 1, wherein Both ends of the support plate are provided with support columns which are telescopic rods.

10. The steel strand straightness detection device according to claim 1, characterized by ​

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