Suspension bridge cable clamp inner hole measuring method

Abstract

The invention discloses a suspension bridge cable clamp inner hole measurement method, and the method comprises the following steps: 1, obtaining the machining size and deviation value of the diameter of a cable clamp inner hole, so as to obtain the measurement reference size of the diameter of the cable clamp inner hole; secondly, the length of a measuring rod in the measuring device is obtained according to the measuring reference size of the diameter of the cable clamp, then the depth of an inner hole of the cable clamp is obtained, and the length of a clamping assembly unit is obtained; and 3, assembling the measuring device according to the length of the measuring rod in the measuring device and the length of the clamping assembly unit, calibrating the measuring device, and measuring by using the measuring device to obtain the actual size of the diameter of the inner hole of the cable clamp. According to the invention, the measurement result of the cable clamp inner hole is accurate.

Description

Technical Field

[0001] The invention relates to an improvement of a method for measuring the inner hole of a cable clamp of a suspension bridge, belongs to the field of bridge measurement, and in particular to a method for measuring the inner hole of a cable clamp of a suspension bridge. Background Art

[0002] The cable clamp is a key connecting component between the main cable and the suspender of a suspension bridge. It transfers the tension of the suspender to the main cable, thereby transferring the structural deadweight of the bridge and vehicle loads to the main cable, ensuring the force balance of the overall structure of the bridge. The position and installation accuracy of the cable clamp directly affect the linear shape of the main cable, and thus affect the structural performance and use function of the bridge. Reasonable cable clamp layout and installation can ensure that the linear shape of the main cable meets the design requirements and improve the span capacity and stability of the bridge. The inner hole diameter of the cable clamp is an important factor affecting whether the cable clamp can clamp the main cable and whether the cable clamp will slip with the main cable under the gravity load of the steel beam and the bridge deck. Most of the existing measurement methods are performed manually, and the measurement results mainly rely on the operator's experience, feel and reading angle. This method is prone to errors, resulting in deviations and inaccuracies in the measurement results.

[0003] The Chinese patent application with application number CN202011326557.6 and application date November 24, 2020 discloses an automated online monitoring method and system for cable clamp slippage, and a readable storage medium. The displacement data of the cable clamp relative to the main cable collected by the displacement meter is sampled according to a preset sampling frequency, and the temperature data collected by the thermometer is sampled. The average temperature vector T of the same cross-section temperature of the main cable is obtained according to the temperature data, and the displacement monitoring vector X of the cable clamp relative to the main cable is obtained according to the displacement data. According to the linear correlation equation between the average temperature vector and the displacement monitoring vector, the corrected cable clamp slippage value is obtained. The above scheme can combine the thermometer measurement results and the displacement meter measurement results, and after algorithm correction, the temperature influence is eliminated to obtain an accurate cable clamp slippage value, but it does not solve the problem of inaccurate measurement results of the cable clamp inner hole.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the problem of inaccurate cable clamp inner hole measurement results in the prior art and to provide a cable clamp inner hole measurement method for a suspension bridge with accurate cable clamp inner hole measurement results.

[0006] To achieve the above objectives, the technical solution of the present invention is: a method for measuring the inner hole of a suspension bridge cable clamp, the method comprising the following steps: The first step is to obtain the machining dimensions and deviation value of the inner hole diameter of the cable clamp to obtain the measurement reference dimension of the inner hole diameter of the cable clamp; The second step is to first obtain the length of the measuring rod in the measuring device based on the measurement reference size of the cable clamp diameter, and then obtain the inner hole depth of the cable clamp to obtain the length of the clamping assembly unit; The third step is to assemble the measuring device according to the length of the measuring rod in the measuring device and the length of the clamping assembly unit, then calibrate the measuring device, and then use the measuring device to measure the actual size of the inner hole diameter of the cable clamp.

[0007] In the first step, the machining dimensions and deviation values ​​of the inner hole diameter of the cable clamp are first obtained to obtain the measurement reference dimensions of the inner hole diameter of the cable clamp, specifically: S1. Calculate the maximum limit size Dmax of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the upper deviation ES, Dmax = D0 + ES; S2. Calculate the minimum limit size Dmin of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the lower deviation EI, Dmin = D0 + EI; S3. Calculate the measurement reference size D of the inner hole of the cable clamp using the maximum limit size Dmax and the minimum limit size Dmin of the inner hole of the cable clamp. j , D j =Dmax +Dmin / 2.

[0008] The measuring device includes a measuring unit, a display unit and a clamping assembly unit; The measuring unit includes a measuring rod, a first measuring head, a second measuring head, a connecting seat, a spring, a sliding column and a measuring column, wherein the second measuring head and the first measuring head are respectively abutted against the left and right sides of the inner wall of the cable clamp, an end of the first measuring head away from the inner wall of the cable clamp is connected to one end of the measuring rod, and the other end of the measuring rod is connected to one end of the connecting seat, a spring is provided in the inner cavity of the connecting seat, one end of the spring is connected to the other end of the measuring rod, and the other end of the spring is connected to the side of the sliding column, the sliding column is movably matched with the inner cavity, and the end of the second measuring head away from the inner wall of the cable clamp is embedded in the sliding column; The clamping assembly unit is sleeved on the outer side of the measuring rod, and the clamping assembly unit includes a clamping seat, a connecting rod and a handle. The clamping slot of the clamping seat is engaged with the outer side of the measuring rod, the top of the clamping seat is connected to the bottom of the connecting rod, and the top of the connecting rod is provided with a handle; The display unit includes a scale, a display and a contact. A measuring column with one end passing through the sliding column is inserted into the top of the connecting seat. The side of the measuring column contacts the end of the second measuring head away from the inner wall of the cable clamp. A scale is installed on the measuring column. The scale is set on the top of the connecting seat, the scale is connected to the display, and one end of the contact is connected to the end of the first measuring head away from the inner wall of the cable clamp.

[0009] The interior of the connecting rod is sleeved with an adjusting rod which moves longitudinally, and the upper end of the adjusting rod is connected to the handle.

[0010] The measuring rod includes a first measuring shaft and at least one second measuring shaft, a first measuring head is inserted into the right side of the first measuring shaft, the first measuring head and the first measuring shaft are fixed by a locking nut, and the left side of the first measuring shaft is inserted into the right side of the second measuring shaft; The adjacent second measuring shafts are plugged in, and the left side of the leftmost second measuring shaft is plugged in with the right side of the connecting seat.

[0011] A first thread groove is provided on the right side of the first measuring shaft, and the first thread groove cooperates with the first probe thread; A clamping block is provided on the left side of the first measuring shaft, and a fixing groove adapted to the clamping block is provided on the right side of the second measuring shaft, and the clamping block is engaged with the fixing groove; A fixing block adapted to the fixing groove is provided on the left side of the second measuring shaft. Adjacent second measuring shafts are fixed by the fixing block and the fixing groove, and the fixing block is plugged into the right side of the connecting seat.

[0012] In the second step, the length of the measuring rod in the measuring device is obtained based on the measurement reference size of the cable clamp diameter, and then the inner hole depth of the cable clamp is obtained to obtain the length of the clamping assembly unit, which also includes: First, assemble the measuring unit in the measuring device, and then measure the maximum length Lmax of the measuring unit in the free state and the minimum length Lmin in the maximum compressed state of the spring to obtain the length Lc of the measuring rod; Then select the measurement reference size D of the inner hole diameter of the cable clamp j The difference between the maximum length Lmax and the minimum length Lmin of the measuring unit is used as the length Lc of the measuring rod. Based on the obtained value of the length Lc of the measuring rod, the number of the first measuring axis and the second measuring axis is determined so that the length of the first measuring axis and the second measuring axis after combination is equal to the calculated value of the length Lc of the measuring rod. Where Lc = D j -Lmax +Lmin / 2.

[0013] First, the clamping seat, connecting rod and handle in the clamping assembly unit are combined to form a clamping unit; then the length Ljc of the clamping assembly unit is measured, and then the length Lg of the connecting rod is determined according to the value of the maximum depth Ls of the inner hole to be measured of the cable clamp, where Lg = Ls - Ljc. Then, based on the value of the length Lg of the connecting rod, the number of the first measuring axis and the second measuring axis is determined so that the length of the first measuring axis and the second measuring axis after combination is equal to the calculated value of the length Lg of the connecting rod.

[0014] The measuring device is then calibrated, specifically: First, move the sliding column to compress the spring. Then, when the distance between the outer ends of the first and second probes is equal to the measuring reference dimension Dj of the inner hole of the cable clamp and the spring is in a compressed state, fix the connecting seat and the sliding column. Then adjust the scale so that there is a certain amount of compression between the scale head and the measuring column and fix the scale. In this state, calibrate the reading of the display to zero.

[0015] The actual size of the inner hole diameter of the cable clamp is obtained by measuring with the measuring device, specifically: First, place the calibrated and zeroed measuring device into the inner hole of the cable clamp to be measured, so that the first probe at the end of the measuring rod is in close contact with the wall of the inner hole of the cable clamp, and keep the measuring rod stationary. Then loosen the fixation between the connecting seat and the sliding column, so that the second probe at the end of the sliding column is in close contact with the wall of the inner hole of the cable clamp in the radial direction of the inner hole of the cable clamp. At this time, the reading displayed on the display is the actual measured size of the inner hole diameter of the cable clamp to be measured.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In a method for measuring the inner hole of a suspension bridge cable clamp of the present invention, the length of the measuring rod in the measuring device is first determined based on the measurement reference dimension of the cable clamp diameter. The inner hole depth of the cable clamp is then determined. By calculating the measurement reference dimension of the cable clamp inner hole, the parameters of the measuring device can be flexibly adjusted according to the design dimensions and processing deviations of different cable clamps, making it suitable for measuring the inner holes of cable clamps of various specifications. The actual dimension value is then calculated based on the measurement reference dimension of the cable clamp diameter. The maximum and minimum limit dimensions of the cable clamp inner hole are then averaged as the measurement reference dimension, providing an accurate reference for subsequent measurements and reducing measurement errors. The measurement reference dimension and measuring rod length are determined using a precise calculation formula, reducing errors caused by human estimation and empirical judgment, and improving the reliability of the measurement results. Therefore, the cable clamp inner hole measurement results of the present invention are accurate.

[0017] 2. In a method for measuring the inner bore of a suspension bridge cable clamp according to the present invention, a first probe, one end of which is remote from the inner wall of the cable clamp, is connected to one end of a measuring rod, the other end of which is connected to one end of a connecting seat, a spring is disposed in the inner cavity of the connecting seat, one end of the spring is connected to the other end of the measuring rod, and the other end of the spring is connected to the side of a sliding post, which is movably engaged with the inner cavity, and a second probe, one end of which is remote from the inner wall of the cable clamp, is embedded in the sliding post. During use, a spring is disposed between the insertion end of the sliding post and the bottom of the inner bore at the left end of the connecting seat, and the measuring post is fixed to the sliding post. In this way, under the action of the spring tension, when the left-end probe and the sliding post move within the connecting seat, they drive the measuring post to move synchronously at a constant speed. The measuring post then transmits the distance moved by the left-end probe to a scale, which displays the equivalent value. This avoids the problem of measurement data discrepancies caused by different hand feel and experience of professional testers. The two probes can more comprehensively and accurately obtain inner bore size information, avoiding the errors that may exist in single-point measurement. Therefore, the measurement results of the present invention take into account more factors and are more accurate.

[0018] 3. In the present invention's method for measuring the inner hole of a suspension bridge cable clamp, the calculated measurement benchmark dimensions provide an accurate reference for subsequent measurements, helping to more accurately assess whether the actual dimensions of the cable clamp inner hole meet design requirements. With accurate measurement data, engineers can better formulate construction plans and maintenance strategies, promptly identify and address non-compliant cable clamp inner hole dimensions, and ensure bridge safety and stability. Therefore, this method provides precise measurements and better maintenance plans.

[0019] 4. In a method for measuring the inner diameter of a suspension bridge cable clamp, the present invention employs a measuring column secured to a sliding column. Under spring tension, the left-end probe, along with the sliding column, moves within the connecting seat, driving the measuring column to move synchronously at a constant speed. The measuring column then transmits the distance traveled by the left-end probe to a scale. This method's accuracy is primarily ensured by the use of a stylus ball and a digital scale. This clever use of the stylus ball and digital scale allows for precise, rapid, and efficient measurement of the cable clamp's inner diameter, avoiding the potential for measurement deviations due to differences in the measurement operator's viewing angle. Consequently, the present invention offers simple measurement and precise results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the present invention.

[0022] Figure 3 It is a side view of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the measuring device in the present invention.

[0024] Figure 5 It is a structural schematic diagram of the clamping component unit in the present invention.

[0025] Figure 6 It is a structural diagram of the measuring unit in the present invention.

[0026] Figure 7 It is a structural schematic diagram of the first measuring axis in the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the second measuring axis in the present invention.

[0028] In the figure: measuring device A, measuring unit B, display unit C, cable clamp 1, clamping assembly unit 2, clamping base 21, connecting rod 23, handle 24, measuring rod 3, first measuring shaft 31, clamping block 311, first threaded groove 312, second measuring shaft 32, fixing block 321, fixing groove 322, locking nut 4, first measuring probe 5, second measuring probe 51, contact 52, connecting base 6, spring 7, scale 8, display 81, sliding column 9, measuring column 10. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] See also Figures 1 to 8 A method for measuring the inner hole of a suspension bridge cable clamp comprises the following steps: The first step is to obtain the machining dimensions and deviation value of the inner hole diameter of the cable clamp 1 to obtain the measurement reference dimension of the inner hole diameter of the cable clamp 1; The second step is to first obtain the length of the measuring rod 3 in the measuring device A based on the measurement reference size of the diameter of the cable clamp 1, and then obtain the inner hole depth of the cable clamp 1 to obtain the length of the clamping assembly unit 2; In the third step, the measuring device A is assembled according to the length of the measuring rod 3 and the length of the clamping assembly unit 2, and then the measuring device A is calibrated. The measuring device A is then used to measure the actual size of the inner hole diameter of the cable clamp 1.

[0031] In the first step, the machining dimensions and deviation values ​​of the inner hole diameter of the cable clamp are first obtained to obtain the measurement reference dimensions of the inner hole diameter of the cable clamp, specifically: S1. Calculate the maximum limit size Dmax of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the upper deviation ES, Dmax = D0 + ES; S2. Calculate the minimum limit size Dmin of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the lower deviation EI, Dmin = D0 + EI; S3. Calculate the measurement reference size D of the inner hole of the cable clamp using the maximum limit size Dmax and the minimum limit size Dmin of the inner hole of the cable clamp. j , D j =Dmax +Dmin / 2.

[0032] The measuring device A comprises a measuring unit B, a display unit C and a clamping assembly unit 2; The measuring unit B includes a measuring rod 3, a first measuring head 5, a second measuring head 51, a connecting seat 6, a spring 7, a sliding column 9 and a measuring column 10. The second measuring head 51 and the first measuring head 5 are respectively abutted against the left and right sides of the inner wall of the cable clamp 1. The end of the first measuring head 5 away from the inner wall of the cable clamp 1 is connected to one end of the measuring rod 3, and the other end of the measuring rod 3 is connected to one end of the connecting seat 6. A spring 7 is provided in the inner cavity 63 of the connecting seat 6. One end of the spring 7 is connected to the other end of the measuring rod 3, and the other end of the spring 7 is connected to the side of the sliding column 9. The sliding column 9 is movably matched with the inner cavity 63. The end of the second measuring head 51 away from the inner wall of the cable clamp 1 is embedded in the sliding column 9. The clamping assembly unit 2 is sleeved on the outer side of the measuring rod 3. The clamping assembly unit 2 includes a clamping seat 21, a connecting rod 23 and a handle 24. The clamping slot 211 of the clamping seat 21 engages with the outer side of the measuring rod 3. The top of the clamping seat 21 is connected to the bottom of the connecting rod 23. The top of the connecting rod 23 is provided with a handle 24. The display unit C includes a scale 8, a display 81 and a contact 52. A measuring column 10 with one end extending through the sliding column 9 is inserted into the top of the connecting base 6. The side surface of the measuring column 10 contacts the end of the second measuring head 51 away from the inner wall of the cable clamp 1. The scale 8 is installed on the measuring column 10. The scale 8 is set at the top of the connecting base 6. The scale 8 is connected to the display 81. One end of the contact 52 is connected to the end of the first measuring head 5 away from the inner wall of the cable clamp 1.

[0033] The interior of the connecting rod 23 is sleeved with an adjusting rod 231 that moves longitudinally, and the upper end of the adjusting rod 231 is connected to the handle 24 .

[0034] The measuring rod 3 includes a first measuring shaft 31 and at least one second measuring shaft 32. A first measuring head 5 is inserted into the right side of the first measuring shaft 31. The first measuring head 5 is fixed to the first measuring shaft 31 by a locking nut 4. The left side of the first measuring shaft 31 is inserted into the right side of the second measuring shaft 32. The adjacent second measuring shafts 32 are plugged in, and the left side of the leftmost second measuring shaft 32 is plugged in with the right side of the connecting seat 6 .

[0035] A first thread groove 312 is formed on the right side of the first measuring shaft 31 , and the first thread groove 312 is threadedly engaged with the first measuring head 5 ; A clamping block 311 is provided on the left side of the first measuring shaft 31, and a fixing groove 322 adapted to the clamping block 311 is provided on the right side of the second measuring shaft 32. The clamping block 311 is engaged with the fixing groove 322. A fixing block 321 adapted to the fixing slot 322 is provided on the left side of the second measuring shaft 32 . Adjacent second measuring shafts 32 are fixed by the fixing block 321 and the fixing slot 322 . The fixing block 321 is plugged into the right side of the connecting seat 6 .

[0036] In the second step, the length of the measuring rod 3 in the measuring device A is first obtained based on the measurement reference size of the diameter of the cable clamp 1, and then the inner hole depth of the cable clamp 1 is obtained to obtain the length of the clamping assembly unit 2. The method further includes: First, assemble the measuring unit B in the measuring device A, and then measure the maximum length Lmax of the measuring unit B in the free state and the minimum length Lmin in the maximum compressed state of the spring 7 to obtain the length Lc of the measuring rod 3; Then select the measurement reference size D of the inner hole diameter of the cable clamp 1 j The difference between the maximum length Lmax and the minimum length Lmin of the measuring unit B is used as the length Lc of the measuring rod 3. Based on the obtained length Lc of the measuring rod 3, the number of the first measuring axis 31 and the second measuring axis 32 is determined so that the length of the first measuring axis 31 and the second measuring axis 32 after combination is equal to the calculated length Lc of the measuring rod 3. Where Lc = D j -Lmax +Lmin / 2.

[0037] First, the clamping seat 21, connecting rod 23 and handle 24 in the clamping assembly unit 2 are combined to form a clamping unit C. Then, the length Ljc of the clamping assembly unit 2 is measured. Then, the length Lg of the connecting rod is determined based on the maximum depth Ls of the inner hole to be measured of the cable clamp 1, where Lg = Ls - Ljc. Then, based on the length Lg of the connecting rod, the number of the first measuring axis 31 and the second measuring axis 32 is determined so that the combined length of the first measuring axis 31 and the second measuring axis 32 is equal to the calculated length Lg of the connecting rod.

[0038] The measuring device A is then calibrated, specifically: First, move the sliding column 9 to compress the spring 7. Then, when the distance between the outer ends of the first and second measuring heads 5, 51 is equal to the measurement reference dimension Dj of the inner hole of the cable clamp 1 and the spring is in a compressed state, fix the connecting seat 6 and the sliding column 10. Then adjust the gauge 8 so that there is a certain amount of compression between the gauge head 8 and the measuring column 10, and fix the gauge 8. In this state, the reading of the display 81 is calibrated to zero.

[0039] The actual size of the inner hole diameter of the cable clamp 1 is obtained by measuring with the measuring device A, specifically: First, place the calibrated and zeroed measuring device A into the inner hole of the cable clamp 1 to be measured, so that the first probe 5 at the end of the measuring rod 3 is in close contact with the wall of the inner hole of the cable clamp 1, and keep the measuring rod 3 stationary. Then, loosen the fixation between the connecting seat 6 and the sliding column 8, so that the second probe 51 at the end of the sliding column 8 is in close contact with the wall of the inner hole of the cable clamp 1 in the radial direction of the inner hole of the cable clamp 1. At this time, the reading displayed on the display 10 is the actual measured size of the inner hole diameter of the cable clamp to be measured.

[0040] The supplementary description of the present invention is as follows: During use, the first measuring axis 31 can be used alone or together with an appropriate number of second measuring axes 32 according to the size of the actual measured object and the measurement range requirements, so as to adjust the overall length of the measuring rod 3. The retractable design enables the measuring rod 3 to adapt to measurement requirements of different lengths, thereby improving the versatility and flexibility of the measuring rod 3.

[0041] Example 1: A method for measuring the inner hole of a suspension bridge cable clamp comprises the following steps: The first step is to obtain the machining dimensions and deviation value of the inner hole diameter of the cable clamp 1 to obtain the measurement reference dimension of the inner hole diameter of the cable clamp 1; The second step is to first obtain the length of the measuring rod 3 in the measuring device A based on the measurement reference size of the diameter of the cable clamp 1, and then obtain the inner hole depth of the cable clamp 1 to obtain the length of the clamping assembly unit 2; In the third step, the measuring device A is assembled according to the length of the measuring rod 3 and the length of the clamping assembly unit 2, and then the measuring device A is calibrated. The measuring device A is then used to measure the actual size of the inner hole diameter of the cable clamp 1.

[0042] The measuring device A comprises a measuring unit B, a display unit C and a clamping assembly unit 2; The measuring unit B includes a measuring rod 3, a first measuring head 5, a second measuring head 51, a connecting seat 6, a spring 7, a sliding column 9 and a measuring column 10. The second measuring head 51 and the first measuring head 5 are respectively abutted against the left and right sides of the inner wall of the cable clamp 1. The end of the first measuring head 5 away from the inner wall of the cable clamp 1 is connected to one end of the measuring rod 3, and the other end of the measuring rod 3 is connected to one end of the connecting seat 6. A spring 7 is provided in the inner cavity 63 of the connecting seat 6. One end of the spring 7 is connected to the other end of the measuring rod 3, and the other end of the spring 7 is connected to the side of the sliding column 9. The sliding column 9 is movably matched with the inner cavity 63. The end of the second measuring head 51 away from the inner wall of the cable clamp 1 is embedded in the sliding column 9. The clamping assembly unit 2 is sleeved on the outer side of the measuring rod 3. The clamping assembly unit 2 includes a clamping seat 21, a connecting rod 23 and a handle 24. The clamping slot 211 of the clamping seat 21 engages with the outer side of the measuring rod 3. The top of the clamping seat 21 is connected to the bottom of the connecting rod 23. The top of the connecting rod 23 is provided with a handle 24. The display unit C includes a scale 8, a display 81 and a contact 52. A measuring column 10 with one end extending through the sliding column 9 is inserted into the top of the connecting base 6. The side surface of the measuring column 10 contacts the end of the second measuring head 51 away from the inner wall of the cable clamp 1. The scale 8 is installed on the measuring column 10. The scale 8 is set at the top of the connecting base 6. The scale 8 is connected to the display 81. One end of the contact 52 is connected to the end of the first measuring head 5 away from the inner wall of the cable clamp 1.

[0043] During use: first hold the clamping assembly 2 and place the first measuring probe 5 against one side of the inner wall of the cable clamp 1. Then, under the compression force of the spring 7, the sliding column 9 slides along the connecting seat 6 to place the second measuring probe 51 against the other inner wall of the cable clamp 1. Then the spring 7 rebounds to fix the entire measuring assembly in the cable clamp 1. Then, the inner hole diameter of the cable clamp 1 measured by the second measuring probe 51 is fed back to the scale 8 through the measuring column 10, thereby obtaining the inner hole diameter of the cable clamp 1.

[0044] Example 2: Example 2 is basically the same as Example 1, except that: In the first step, the machining dimensions and deviation values ​​of the inner hole diameter of the cable clamp are first obtained to obtain the measurement reference dimensions of the inner hole diameter of the cable clamp, specifically: S1. Calculate the maximum limit size Dmax of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the upper deviation ES, Dmax = D0 + ES; S2. Calculate the minimum limit size Dmin of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the lower deviation EI, Dmin = D0 + EI; S3. Calculate the measurement reference size D of the inner hole of the cable clamp using the maximum limit size Dmax and the minimum limit size Dmin of the inner hole of the cable clamp. j , D j =Dmax +Dmin / 2.

[0045] Example 3: Example 3 is basically the same as Example 1, except that: In the second step, the length of the measuring rod 3 in the measuring device A is first obtained based on the measurement reference size of the diameter of the cable clamp 1, and then the inner hole depth of the cable clamp 1 is obtained to obtain the length of the clamping assembly unit 2. The method further includes: First, assemble the measuring unit B in the measuring device A, and then measure the maximum length Lmax of the measuring unit B in the free state and the minimum length Lmin in the maximum compressed state of the spring 7 to obtain the length Lc of the measuring rod 3; It should be noted that when the effective length of the spring 7 is selected, it is necessary to ensure that the spring 7 is always in a compressed state during the full stroke of the sliding of the measuring column 10 in the long circular groove above the fixed seat, and the maximum compressed length of the spring 7 should be greater than or equal to 20 mm.

[0046] Then select the measurement reference size D of the inner hole diameter of the cable clamp 1 j The difference between the maximum length Lmax and the minimum length Lmin of the measuring unit B is used as the length Lc of the measuring rod 3. Based on the obtained length Lc of the measuring rod 3, the number of the first measuring axis 31 and the second measuring axis 32 is determined so that the length of the first measuring axis 31 and the second measuring axis 32 after combination is equal to the calculated length Lc of the measuring rod 3. Where Lc = D j -Lmax +Lmin / 2; The number of the second measuring shafts 32 can be 0, 1 or more. The lengths of the second measuring shafts 32 include 1000 mm, 500 mm, 200 mm, 100 mm, 50 mm, 20 mm, 10 mm, etc. During actual measurement, the second measuring shafts 32 are selected and combined according to the basic size of the inner hole diameter of the cable clamp to be measured. First, the clamping seat 21, connecting rod 23 and handle 24 in the clamping assembly unit 2 are combined to form a clamping unit C. Then, the length Ljc of the clamping assembly unit 2 is measured. Then, the length Lg of the connecting rod is determined based on the maximum depth Ls of the inner hole to be measured of the cable clamp 1, where Lg = Ls - Ljc. Then, based on the length Lg of the connecting rod, the number of the first measuring axis 31 and the second measuring axis 32 is determined so that the combined length of the first measuring axis 31 and the second measuring axis 32 is equal to the calculated length Lg of the connecting rod.

[0047] Example 4: Example 4 is basically the same as Example 1, except that: The assembly of the measuring device comprises the following steps: Step 1: Assembly of the measurement module. This includes the following: (1) First, connect a probe to the internal thread end of the sliding column and lock it with a nut. Then, install the spring into the countersunk hole of the connecting seat, and then insert it into the countersunk hole of the connecting seat. (2) Pass the lower end of the sliding column through the oblong hole on the connecting seat and fix it to the sliding column; (3) First, connect another probe to the internal thread end of the connecting rod and lock it with a nut, then connect the measuring rod to the internal thread end of the connecting seat (if the actual required length of the measuring rod is zero, directly connect another probe to the internal thread end of the connecting seat) to form a measuring module; Step 2: Assembly of the clamping module. This includes the following: (1) Connect the connecting rod, handle and clamping seat into one piece (if the actual required length of the connecting rod is zero, directly connect the handle and clamping seat) to form a clamping module. (2) Fit the clamping seat in the clamping module onto the middle of the measuring rod and tighten the fixing screws.

[0048] Step 3: Assemble the display module. Fix the meter to the connection base so that the contacts are pressed into contact with the measuring column; fix the display.

[0049] Example 5: Example 5 is basically the same as Example 1, except that: The calibration of the measuring device specifically includes the following process: (1) First move the sliding column toward the spring end and make it spring. When the distance between the two outer ends of the two probes is equal to the measurement reference size Dj of the inner hole of the cable clamp and the spring is in a compressed state, tighten the screws between the connecting seat and the sliding column to fix the sliding column relatively.

[0050] The measuring rod 3 includes a first measuring shaft 31 and at least one second measuring shaft 32. A first measuring head 5 is inserted into the right side of the first measuring shaft 31, and the first measuring head 5 is fixed to the first measuring shaft 31 via a locking nut 4. The left side of the first measuring shaft 31 is inserted into the right side of the second measuring shaft 32. Adjacent second measuring shafts 32 are inserted, and the left side of the leftmost second measuring shaft 32 is inserted into the right side of the connecting base 6. A first thread groove 312 is defined on the right side of the first measuring shaft 31, and the first thread groove 312 is threadedly engaged with the first measuring head 5. A clamping block 311 is provided on the left side of the first measuring shaft 31, and a fixing groove 322 is defined on the right side of the second measuring shaft 32, which is adapted to the clamping block 311. The clamping block 311 engages with the fixing groove 322. A fixing block 321 is provided on the left side of the second measuring shaft 32, which is adapted to the fixing groove 322. Adjacent second measuring shafts 32 are fixed by the fixing blocks 321 and the fixing groove 322. The fixing block 321 is inserted into the right side of the connecting base 6.

[0051] During use, the measuring rod 3 is placed in the slot 211 of the clamping seat 21, so that the outer side of the measuring rod 3 is engaged with the slot 211. At this time, the measuring rod 3 is initially fixed by the clamping seat 21. By tightening the bolt 22, the bolt 22 moves in the second buffer groove 213 toward the slot 211, thereby squeezing the measuring rod 3, so that the measuring rod 3 is further clamped and firmly fixed. The open setting of the second buffer groove 213 facilitates the screwing in and out operation of the bolt 22, and also provides a certain space for the movement of the bolt 22, so that it can better apply the clamping force to the measuring rod 3. When the measuring rod 3 needs to be fixed, the measuring rod 3 is first placed in the clamping groove 211 of the clamping seat 21, and then the bolt 22 is tightened to firmly clamp the measuring rod 3 in the clamping seat 21. At this time, the position of the measuring rod 3 is fixed and will not shake or move, providing stable conditions for subsequent measurements or other operations. If the position of the clamping assembly needs to be adjusted, the operator holds the handle 24 and moves the handle 24 up or down. The handle 24 drives the adjustment rod 231 to move up and down in the connecting rod 23, thereby changing the height position of the entire clamping assembly. The threaded part of the first measuring head 5 is aligned with the first thread groove 312 on the right side of the first measuring shaft 31, and then the first measuring head 5 is screwed in so that it is threadedly matched with the first measuring shaft 31. By tightening the locking nut 4, the connection between the first measuring head 5 and the first measuring shaft 31 is further fixed to ensure that the first measuring head 5 will not loosen during the measurement process. Then, the blocking block 311 on the left side of the first measuring shaft 31 is aligned with the fixing groove 322 on the right side of the second measuring shaft 32, and then the first measuring shaft 31 is inserted into the second measuring shaft 32 so that the blocking block 311 is engaged with the fixing groove 322, thereby realizing the connection between the first measuring shaft 31 and the second measuring shaft 32. This engaging connection method can ensure that the connection between the two measuring shafts is firm and stable.

[0052] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A method for measuring the inner hole of a suspension bridge cable clamp, characterized by: The method for measuring the inner hole of a suspension bridge cable clamp comprises the following steps: The first step is to obtain the machining size and deviation value of the inner hole diameter of the cable clamp (1) to obtain the measurement reference size of the inner hole diameter of the cable clamp (1); The second step is to first obtain the length of the measuring rod (3) in the measuring device (A) based on the measurement reference size of the diameter of the cable clamp (1), and then obtain the inner hole depth of the cable clamp (1) to obtain the length of the clamping component unit (2); The third step is to assemble the measuring device (A) according to the length of the measuring rod (3) in the measuring device (A) and the length of the clamping assembly unit (2), and then calibrate the measuring device (A). Then, the measuring device (A) is used to measure the actual size of the inner hole diameter of the cable clamp (1).

2. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 1, characterized in that: In the first step, the machining dimensions and deviation values ​​of the inner hole diameter of the cable clamp are first obtained to obtain the measurement reference dimensions of the inner hole diameter of the cable clamp, specifically: S1. Calculate the maximum limit size Dmax of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the upper deviation ES, Dmax = D0 + ES; S2. Calculate the minimum limit size Dmin of the inner hole of the cable clamp based on the theoretical basic size D0 of the inner hole of the cable clamp and the lower deviation EI, Dmin = D0 + EI; S3. Calculate the measurement reference size D of the inner hole of the cable clamp using the maximum limit size Dmax and the minimum limit size Dmin of the inner hole of the cable clamp. j , D j = (Dmax + Dmin) / 2.

3. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 2, characterized in that: The measuring device (A) comprises a measuring unit (B), a display unit (C) and a clamping assembly unit (2); The measuring unit (B) comprises a measuring rod (3), a first measuring head (5), a second measuring head (51), a connecting seat (6), a spring (7), a sliding column (9) and a measuring column (10), wherein the second measuring head (51) and the first measuring head (5) are respectively abutted against the left and right sides of the inner wall of the cable clamp (1), one end of the first measuring head (5) away from the inner wall of the cable clamp (1) is connected to one end of the measuring rod (3), and the other end of the measuring rod (3) is connected to one end of the connecting seat (6), a spring (7) is provided in the inner cavity (63) of the connecting seat (6), one end of the spring (7) is connected to the other end of the measuring rod (3), and the other end of the spring (7) is connected to the side of the sliding column (9), the sliding column (9) is movably matched with the inner cavity (63), and the end of the second measuring head (51) away from the inner wall of the cable clamp (1) is embedded in the sliding column (9); The clamping assembly unit (2) is sleeved on the outer side of the measuring rod (3), and the clamping assembly unit (2) includes a clamping seat (21), a connecting rod (23) and a handle (24). The clamping slot (211) of the clamping seat (21) is engaged with the outer side of the measuring rod (3), the top of the clamping seat (21) is connected to the bottom of the connecting rod (23), and the top of the connecting rod (23) is provided with a handle (24); The display unit (C) includes a meter (8), a display (81) and a contact (52). A measuring column (10) having one end extending through the sliding column (9) is plugged into the top of the connecting seat (6). The side surface of the measuring column (10) contacts the end of the second measuring head (51) away from the inner wall of the cable clamp (1). The measuring column (10) is mounted with a meter (8). The meter (8) is arranged on the top of the connecting seat (6). The meter (8) is connected to the display (81). One end of the contact (52) is connected to the end of the first measuring head (5) away from the inner wall of the cable clamp (1).

4. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 3, characterized in that: The interior of the connecting rod (23) is sleeved with a longitudinally movable adjustment rod (231), and the upper end of the adjustment rod (231) is connected to the handle (24).

5. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 3, characterized in that: The measuring rod (3) includes a first measuring shaft (31) and at least one second measuring shaft (32), a first measuring head (5) is plugged into the right side of the first measuring shaft (31), the first measuring head (5) and the first measuring shaft (31) are fixed via a locking nut (4), and the left side of the first measuring shaft (31) is plugged into the right side of the second measuring shaft (32); The adjacent second measuring shafts (32) are plugged in, and the left side of the leftmost second measuring shaft (32) is plugged in with the right side of the connecting seat (6).

6. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 5, characterized in that: A first thread groove (312) is provided on the right side of the first measuring shaft (31), and the first thread groove (312) is threadably engaged with the first measuring head (5); A clamping block (311) is provided on the left side of the first measuring shaft (31), and a fixing groove (322) adapted to the clamping block (311) is provided on the right side of the second measuring shaft (32), wherein the clamping block (311) is engaged with the fixing groove (322); A fixing block (321) adapted to the fixing groove (322) is provided on the left side of the second measuring shaft (32), and adjacent second measuring shafts (32) are fixed by the fixing blocks (321) and the fixing grooves (322), and the fixing blocks (321) are plugged into the right side of the connecting seat (6).

7. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 3, characterized in that: In the second step, the length of the measuring rod (3) in the measuring device (A) is first obtained based on the measurement reference size of the diameter of the cable clamp (1), and then the inner hole depth of the cable clamp (1) is obtained to obtain the length of the clamping assembly unit (2), and further includes: First, the measuring unit (B) in the measuring device (A) is assembled, and then the maximum length Lmax of the measuring unit (B) in the free state and the minimum length Lmin in the maximum compressed state of the spring (7) are measured to obtain the length Lc of the measuring rod (3); Then select the measurement reference size D of the inner hole diameter of the cable clamp (1) j The difference between the maximum length Lmax and the minimum length Lmin of the measuring unit (B) is used as the value of the length Lc of the measuring rod (3); and according to the obtained value of the length Lc of the measuring rod (3), the number of the first measuring axis (31) and the second measuring axis (32) is determined so that the length of the first measuring axis (31) and the second measuring axis (32) after combination is equal to the calculated value of the length Lc of the measuring rod (3); Where Lc = D j -(Lmax +Lmin) / 2.

8. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 3, characterized in that: First, the clamping seat (21), the connecting rod (23) and the handle (24) in the clamping assembly unit (2) are combined to form a clamping unit (C); then, the length Ljc of the clamping assembly unit (2) is measured, and then the length Lg of the connecting rod is determined according to the value of the maximum depth Ls of the inner hole to be measured of the cable clamp (1), wherein Lg=Ls-Ljc; and then, according to the value of the length Lg of the connecting rod, the number of the first measuring axis (31) and the second measuring axis (32) is determined so that the length of the first measuring axis (31) and the second measuring axis (32) after combination is equal to the calculated value of the length Lg of the connecting rod.

9. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 3, characterized in that: The measuring device (A) is then calibrated, specifically: First, move the sliding column (9) to put the spring (7) in a compressed state, and then when the distance between the outer ends of the first probe (5) and the second probe (51) is equal to the measurement reference size Dj of the inner hole of the cable clamp (1) and the spring is in a compressed state, fix the connecting seat (6) and the sliding column (10), and then adjust the gauge (8) so that there is a certain amount of compression between the gauge head (8) and the measuring column (10) and fix the gauge (8). In this state, the reading of the display (81) is calibrated to zero.

10. The method for measuring the inner hole of a suspension bridge cable clamp according to claim 9, characterized in that: The actual size of the inner hole diameter of the cable clamp (1) is obtained by measuring using the measuring device (A), specifically: First, place the calibrated and zeroed measuring device (A) in the inner hole of the cable clamp (1) to be measured, so that the first probe (5) at the end of the measuring rod (3) is in close contact with the wall of the inner hole of the cable clamp (1), and keep the measuring rod (3) motionless, then loosen the fixation between the connecting seat (6) and the sliding column (8), so that the second probe (51) at the end of the sliding column (8) is in close contact with the wall of the inner hole of the cable clamp (1) in the radial direction of the inner hole of the cable clamp (1). At this time, the reading displayed on the display (10) is the actual measured size of the inner hole diameter of the cable clamp to be measured.

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