Calibrating device for perpendicularity detection ruler of constructional engineering quality detector group

Abstract

The utility model discloses a building engineering quality detector group verticality detection ruler calibration device, which is characterized in that a guide shaft seat is arranged at the upper end of a base, the upper end of the guide shaft seat is connected with the lower end of a stand column, a guide shaft is arranged in an arc-shaped long hole penetrating through the guide shaft seat, and a positioning cap and a guide shaft shoulder disc are respectively arranged at two ends of the guide shaft; a lower through hole penetrates through the guide shaft seat, and a reset mechanism and a digital display micrometer head are arranged at the two ends of the lower through hole respectively; the upper end of the stand column is connected with the lower end of a rotating shaft seat, an upper through hole is formed in the rotating shaft seat in a penetrating mode, a center rotating shaft is arranged in the upper through hole, a positioning cap and a clamping seat are arranged at the two ends of the center rotating shaft respectively, and an upper base plate and a lower base plate are arranged on the rotating shaft seat and the guide shaft seat respectively. According to the utility model, a pendulum type working principle is adopted, calibration of indicating value variability, zero position correctness and indicating value error metering performance of the verticality detection ruler is realized, and an effective metering technical guarantee is provided for building engineering quality.

Description

Technical Field

[0001] This utility model relates to a calibration technology for a verticality measuring ruler, and in particular to a calibration device for a verticality measuring ruler of a building engineering quality detector group. Background Technology

[0002] With the rapid development of the national construction industry and the increasing technical requirements for engineering quality, construction quality inspection is a crucial link in ensuring the safety, reliability, and compliance with functional and technical specifications of buildings. The accuracy and reliability of inspection scales are of great significance in ensuring engineering quality.

[0003] The existing calibration method for the verticality measuring ruler of the building engineering quality detector group, based on the "JJF1110-2003 Calibration Specification for Building Engineering Quality Detector Groups", has incomplete calibration items, unreliable positioning benchmarks, and inconsistent calibration methods with usage methods. Therefore, the existing calibration method cannot meet the calibration requirements for the indication error of the verticality measuring ruler. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of existing calibration technology and provide a calibration device for the verticality detection ruler of a building engineering quality detector group that is reasonably designed, accurately calibrated and easy to operate.

[0005] The technical solution of the utility model is:

[0006] A verticality measuring ruler calibration device for a building engineering quality detector assembly includes a base and a column. A guide shaft seat is provided at the upper end of the base, and the upper end of the guide shaft seat is connected to the lower end of the column. An arc-shaped elongated hole is provided radially through the guide shaft seat, and a guide shaft is disposed within the arc-shaped elongated hole. A positioning cap is provided at the rear end of the guide shaft, and a guide shaft shoulder plate is provided at the front end. A lower through hole is provided radially through the guide shaft seat, and a reset mechanism and a digital display micrometer head are respectively provided at both ends of the lower through hole. The upper end of the column is connected to the lower end of the rotating shaft seat, and the rotating shaft is provided radially through the lower through hole. The base is provided with an upper through hole, in which a central rotating shaft is provided. A positioning cap is provided at the rear end of the central rotating shaft, and a retaining seat is provided at the front end. The two ends of the verticality measuring scale are respectively connected to the guide shaft shoulder plate and the retaining seat. Under the action of the reset mechanism and the digital display micrometer head, it can swing left and right around the central rotating shaft to realize the calibration of the verticality measuring scale indication error. The rotating shaft base and the guide shaft base are respectively provided with an upper base plate and a lower base plate. The two ends of the reference surface of the verticality measuring scale are respectively connected to the upper base plate and the lower base plate to realize the zero-position calibration of the verticality measuring scale.

[0007] Furthermore: the end face of the guide shaft shoulder plate is provided with a positioning shaft hole and a lower support point for indication calibration, and the wall of the hole penetrating the positioning shaft hole has a radial threaded hole, in which a ball set screw is provided; the card holder is a U-shaped structure, and the bottom and the inner surface of the left side wall are respectively provided with an upper support point for indication calibration, and the right side wall of the card holder is provided with a threaded hole, in which a knurled hand screw is screwed, and the inner hole of the left end of the knurled hand screw is provided with a positioning shoulder shaft, and rotating the knurled hand screw realizes the positioning and installation of the verticality measuring ruler.

[0008] Furthermore: the two ends of the central rotating shaft are rotatably connected to the upper through hole through bearings respectively, and a spacer is fitted on the central rotating shaft between the bearings on both sides. The positioning cap is fixed to the rear end of the central rotating shaft by positioning screws, and the card seat and the front end of the central rotating shaft are provided with card seat positioning screws.

[0009] Furthermore: the two ends of the guide shaft are slidably mounted to the arc-shaped elongated hole through bearings, and a spacer is fitted on the guide shaft between the bearings on both sides. The positioning cap is fixed to the rear end of the guide shaft by positioning screws. A guide wheel is provided in the middle of the spacer, and the outer circular surface of the guide wheel has an arc-shaped structure.

[0010] Furthermore: the lower through hole has a two-section structure, with the reset mechanism installed in the left lower through hole and the digital micrometer head installed in the right lower through hole; the reset mechanism includes a fixed sleeve, an adjusting screw, a reset spring, and a push rod. The right end of the fixed sleeve is connected to the left lower through hole, and the left end of the fixed sleeve has a threaded hole in which the adjusting screw is screwed. The inner hole of the fixed sleeve has a push rod, and the two are slidably fitted. The reset spring is installed between the push rod and the adjusting screw, and the right end of the push rod contacts the outer circular surface of the guide wheel; the left end of the digital micrometer head is connected to the right lower through hole, and the measuring working surface of the digital micrometer head contacts the outer circular surface of the guide wheel under the action of the reset mechanism.

[0011] Furthermore: a flange is provided at the lower end of the guide shaft seat, the flange is fixed to the base by fastening screws, and support feet are provided at intervals at the lower end of the base. The support feet are adjustable and can adjust the horizontal state of the calibration device.

[0012] Furthermore: the upper substrate and the lower substrate are respectively connected to the rotating shaft seat and the guide shaft seat by substrate positioning screws, and the substrate positioning screws are spaced apart, with at least two of them.

[0013] Furthermore, both the upper and lower substrates are L-shaped structures, with their respective long sides mounted and positioned on the mounting surfaces of the rotating shaft seat and the guide shaft seat. Zero-position calibration upper support points are provided on the inner surfaces of the short and long sides of the upper substrate, and a zero-position calibration lower support point is provided on the inner surface of the long side of the lower substrate. A spherical fine-tuning screw is provided on the inner surface of the short side of the lower substrate as an adjustable zero-position calibration lower support point. A set screw is provided perpendicular to the spherical fine-tuning screw to position and adjust the spherical fine-tuning screw.

[0014] Furthermore: a zero-position calibration side positioning mechanism is respectively provided on the upper substrate and the lower substrate. The zero-position calibration side positioning mechanism includes a mounting base, a positioning rod, and a top pressure spring. The mounting base is connected to the upper substrate or the lower substrate by mounting screws. The mounting base is provided with a through hole. The positioning rod and the top pressure spring are disposed in the through hole. The right end of the through hole is blocked by a plug. The left end of the positioning rod extends out from the left end of the through hole under the action of the top pressure spring. The mounting base is respectively provided with a strip groove and a limiting groove. A handle is provided in the strip groove. The lower end of the handle is connected to the positioning rod and can drive the positioning rod to move left and right.

[0015] Furthermore: The calibration device adopts a pendulum structure, with the center line of the central rotating shaft for positioning, and the distance R between the central rotating shaft and the guide shaft axis as the calibration reference for installing the detection ruler. The digital micrometer head reciprocates under the action of the guide shaft reset mechanism to realize the angular displacement of the verticality detection ruler. The digital micrometer head is given a moving distance value, and the corresponding point values ​​are read from the verticality detection ruler indicator.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model adopts the working principle of a pendulum structure, which realizes the calibration of the variability of the verticality measuring ruler's indication value, the accuracy of the zero position, and the measurement performance of the indication error. It provides an effective metrological technical guarantee for the quality of building engineering, further improves the method of calibrating its metrological performance, and provides a metrological technical guarantee for the calibration of the "Building Engineering Quality Inspection Ruler".

[0018] 2. This utility model places the digital display micrometer head and guide shaft reset mechanism at the lower part of the entire device, which corresponds exactly to the arm of the inspector when performing seated inspection. This eliminates the need to raise the arm or bend over, improving inspection efficiency and enhancing the comfort of the inspector.

[0019] 3. In the error calibration process of this utility model, the lower end positioning post of the measuring scale is first placed in the positioning shaft hole of the guide shaft shoulder plate and positioned by the ball set screw. The upper end is placed in the card seat and the hand-turned wheel screw links with the shoulder shaft to realize the installation and positioning of the measuring scale before calibration.

[0020] 4. This utility model uses a bearing as the swing connection, which improves the flexibility and portability of the swing, and correspondingly improves the accuracy of calibration.

[0021] 5. This utility model sets a positioning fulcrum to improve positioning accuracy, and the positioning fulcrum can be infinitely fine-tuned to improve measurement accuracy.

[0022] 6. This utility model has a reasonable design, accurate calibration, and is easy to operate. It is easy to promote and implement, and has good economic benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a verticality measuring ruler calibration device for a building engineering quality detector group.

[0024] Figure 2 A side view of a verticality measuring ruler calibration device for a building engineering quality detector group;

[0025] Figure 3 for Figure 1 Sectional view A-A;

[0026] Figure 4 for Figure 1 Sectional view of B-B;

[0027] Figure 5 for Figure 2 Enlarged view of a portion of the image;

[0028] Figure 6 for Figure 2 Cross-sectional view of the zero-position calibration side positioning mechanism;

[0029] Figure 7 A calibration diagram showing the indication values ​​of a verticality measuring ruler calibration device for a building engineering quality detector group;

[0030] Figure 8 This is a zero-position calibration diagram for a verticality measuring ruler calibration device for a building engineering quality detector group.

[0031] Figure 9 This is a schematic diagram illustrating the working principle of a verticality measuring ruler calibration device for a building engineering quality detector group. Detailed Implementation

[0032] Example 1: See Figure 1 -- Figure 9In the diagram, 1-base, 2-flange, 3-guide shaft seat, 4-positioning shaft hole, 5-ball bearing, 6-guide shaft shoulder plate, 7-column, 8-rotating shaft seat, 9-rotating shaft mechanism, 10-cap, 11-zero-position calibration upper base plate, 12-base plate positioning screw, 13-zero-position calibration lower base plate, 14-fastening screw, 15-positioning shoulder shaft, 16-knurled hand-tightening screw, 17-casing, 18-casing position positioning screw, 19-center rotating shaft, 20-spacer, 21-bearing, 22-positioning cap, 23-positioning screw, 24-set screw, 25- 26-Spherical fine-tuning screw, 27-Zero-position calibration upper fulcrum, 28-Indication calibration upper fulcrum, 29-Fixing sleeve, 30-Adjusting screw, 31-Reset spring, 32-Top rod, 33-Indication calibration lower fulcrum, 34-Guide shaft, 35-Guide wheel, 36-Digital micrometer head, 37-Guide shaft reset mechanism, 38-Verticality measuring ruler, 39-Support foot, 40-Zero-position calibration side positioning mechanism, 41-Limit groove, 42-Mounting base, 43-Mounting screw, 44-Top pressure spring, 45-Plug, 46-Handle, 47-Positioning rod, 48-Positioning column.

[0033] A verticality measuring ruler calibration device for a building engineering quality detector set includes a base 1 and a column 7. The base 1 can be made into a cuboid structure, and the column 7 is cylindrical. A guide shaft seat 3 is provided at the upper end of the base 1. The upper end of the central shaft hole of the guide shaft seat 3 is plugged into the lower end of the column 7 (a double-screw fastening connection can be used). An arc-shaped elongated hole is provided through the guide shaft seat 3, and a guide shaft 33 is arranged in the arc-shaped elongated hole. A positioning cap 22 is provided at the rear end of the guide shaft 33, and a guide shaft shoulder plate 6 is provided at the front end. A lower through hole is provided perpendicular to the guide shaft 33 and through the guide shaft seat 3. A reset mechanism 36 and a digital display micrometer head 35 are respectively provided at both ends of the lower through hole. The upper end of the column 7 is connected to a rotating shaft seat 8. The column mounting hole is a plug-in connection, and a plug 10 is provided at the top. The rotating shaft seat 8 is provided with an upper through hole, and a central rotating shaft 19 is provided in the upper through hole. A positioning cap 22 is provided at the rear end of the central rotating shaft 19, and a retainer 17 is provided at the front end. The two ends of the verticality measuring scale 37 are respectively connected to the guide shaft shoulder plate 6 and the retainer 17. Under the action of the digital display micrometer head 35 and the reset mechanism 36, it can swing left and right around the central rotating shaft 19 to realize the calibration of the verticality measuring scale indication error. The rotating shaft seat 8 and the guide shaft seat 3 are respectively provided with an upper base plate 11 and a lower base plate 13. The two ends of the reference surface of the verticality measuring scale 37 are respectively attached to the upper base plate 11 and the lower base plate 13 for positioning, realizing the zero-position calibration of the verticality measuring scale.

[0034] Preferred solution: The guide shaft shoulder plate 6 has a positioning shaft hole 4 and a lower support point 32 for indication calibration on its end face. The guide shaft shoulder plate 6 also has a radial threaded hole with a ball set screw 5. The cassette 17 has a U-shaped structure with an upper support point 27 for indication calibration on its bottom and the inner surface of its left side wall. The right side wall of the cassette 17 has a threaded hole with a knurled hand screw 16 screwed into it. The left end of the knurled hand screw 16 has a positioning shoulder shaft 15. Rotating the knurled hand screw 16 achieves the positioning and installation of the verticality measuring ruler.

[0035] Preferred solution: The two ends of the central rotating shaft 19 are rotatably connected to the upper through hole through bearings 21 respectively. A spacer 20 is fitted on the central rotating shaft 19 between the two bearings 21. The positioning cap 22 is fixed to the rear end of the central rotating shaft 19 by the positioning screw 23. The card seat 17 is installed at the front end of the central rotating shaft 19 and positioned by the card seat positioning screw 18.

[0036] Preferred embodiment: The two ends of the guide shaft 33 are rotatably connected to the arc-shaped elongated hole through bearings 21, and a spacer 20 is fitted on the guide shaft 33 between the two bearings 21. The positioning cap 22 is fixed to the rear end of the guide shaft 33 by positioning screws 23. A guide wheel 34 is provided in the middle of the spacer 20, and the outer circular surface of the guide wheel 34 has an arc-shaped structure.

[0037] Preferred solution: The lower through hole perpendicular to the arc-shaped elongated hole of the guide shaft seat has a two-section structure. A reset mechanism 36 is provided in the lower through hole at the left end, and a digital micrometer head 35 is provided in the lower through hole at the right end. The reset mechanism includes a fixed sleeve 28, an adjusting screw 29, a reset spring 30, and a push rod 31. The right end of the fixed sleeve 28 is connected to the lower through hole at the left end. The right end of the fixed sleeve 28 is provided with a threaded hole in which the adjusting screw 29 is screwed. The push rod 31 is provided in the inner hole of the fixed sleeve 28. The two are in sliding fit. A reset spring 30 is provided between the push rod 31 and the adjusting screw 29. The right end of the push rod 31 is in contact with the outer circular surface of the guide wheel 34. The left end of the digital micrometer head 35 is installed in the lower through hole at the right end. The measuring working surface of the digital micrometer head 35 is in contact with the outer circular surface of the guide wheel 34 under the action of the reset mechanism.

[0038] Preferred solution: A flange 2 is provided at the lower end of the guide shaft seat 3. The flange 2 is fixed to the base 1 by fastening screws 14. Support feet 38 are provided at intervals at the lower end of the base 1. The support feet 38 are adjustable and can adjust the horizontal state of the calibration device.

[0039] Preferred solution: The upper substrate 11 and the lower substrate 13 are respectively connected to the rotating shaft seat 8 and the guide shaft seat 3 by substrate positioning screws 12. The substrate positioning screws 12 are arranged at intervals, with at least two screws.

[0040] Preferred solution: Both the upper substrate 11 and the lower substrate 13 are L-shaped structures. The outer surfaces of their long sides are respectively installed and positioned with the rotating shaft seat 8 and the guide shaft seat 3. The inner surfaces of the short and long sides of the upper substrate 11 are respectively provided with zero-position calibration upper support points 26 (there are two zero-position calibration upper support points 26 on the long side and one zero-position calibration upper support point 26 on the short side). The inner surface of the long side of the lower substrate 13 is provided with a zero-position calibration lower support point (there is one zero-position calibration lower support point, which forms a triangular positioning with the two on the long side of the upper substrate). The inner surface of the short side of the lower substrate 13 is provided with a spherical fine-tuning screw 25 as an adjustable zero-position calibration lower support point (forming a line with the zero-position calibration upper support point on the short side of the upper substrate). By adjusting the spherical fine-tuning screw 25, the two points can be aligned to a plumb line, so that the left side of the verticality measuring ruler 37 remains plumb and vertical. A positioning screw 24 is provided perpendicular to the spherical fine-tuning screw 25 to position the adjusted spherical fine-tuning screw 25.

[0041] Preferred embodiment: A zero-position calibration side positioning mechanism 39 is respectively provided on the upper substrate 11 and the lower substrate 13. The zero-position calibration side positioning mechanism 39 includes a mounting base 41, a positioning rod 46 and a top pressure spring 43. The mounting base 43 is connected to the upper substrate 11 or the lower substrate 13 by mounting screws 42. The mounting base 41 is provided with a through hole. The positioning rod 46 and the top pressure spring 43 are disposed in the through hole. The right end of the through hole is blocked by a plug 44. The left end of the positioning rod 46 extends out from the left end of the through hole. The mounting base 41 is provided with a strip groove and a limiting groove 40 respectively. A handle 45 is provided in the strip groove. The lower end of the handle 46 is connected to the positioning rod 46 and can drive the positioning rod 46 to move left and right.

[0042] Before measurement, push the handle 45 to retract the positioning rod 46. Once in position, rotate the handle 45, and the handle 45 will enter the limiting groove 40. Then, place the positioning post 47 of the verticality measuring ruler 37 on the upper end face of the lower base plate 13. The wide side of the verticality measuring ruler 37 is coplanar with the long side 3 support points of the upper base plate 11 and the lower base plate 13. Under the action of the upper and lower side positioning mechanisms 39, the working surface of the measuring ruler is against the upper and lower reference support points of the short side. Finally, rotate the handle 45 in the opposite direction, and the handle 45 returns to the strip groove. The top spring 43 pushes the positioning rod 46 to extend and presses the right side of the verticality measuring ruler 37, thereby forming the positioning.

[0043] 1. Calibration working principle:

[0044] The device employs a pendulum-type structure, positioned along the center line of the upper rotating shaft mechanism and aligned with the center line of the guide shaft mechanism. The digital micrometer head reciprocates under the action of the guide shaft reset mechanism 36 to detect the angular displacement of the measuring scale. A given movement distance is input to the digital micrometer head 35, and the corresponding values ​​are read from the measuring scale indicator. The schematic diagram is shown below. Figure 9 As shown.

[0045] The measurement is performed using a comparative method, based on the distance traveled by the micrometer head. L 1. Distance between the central axis and the guide axis R The ratio forms the standard angle β 1 (sin β 1= L 1 / R ), compare the perpendicularity measurement of the ruler rotation angle β 2(sin β 2= L 2 / R The indication error is determined by the principle of constant-growth transmission of the micrometer screw pair, which converts the rotary motion of the micrometer screw into linear motion, thus transforming the angular displacement of the perpendicularity measuring scale into linear displacement. The indication error is then expressed as a linear value. ΔL= L 2- L 1.

[0046] L 1: Micrometer head travel distance (mm) L 2: Verticality measurement ruler reading (mm)

[0047] β 1: Standard Angle β 2: Verticality inspection ruler rotation angle

[0048] R Distance between the center shaft axis and the guide shaft axis (mm) ΔL Indication error: mm.

[0049] 2. Verticality measuring ruler calibration and installation:

[0050] Unfold the locking buckle of the verticality measuring ruler 37, place its positioning pin 39 in the positioning shaft hole 4, and limit it by the elastic action of the ball screw 5; place the upper end of the ruler body in the card seat 17, and position it coplanarly by the upper fulcrum 27 of the card seat 17 and the lower fulcrum 32 of the guide shaft shoulder plate 6; rotate the handwheel 16 to link the positioning plate 15 to complete the installation and positioning of the verticality measuring ruler 37 before calibration.

[0051] 3. Calibration of indicated value variability:

[0052] Rotate the digital micrometer head 35 to align the pointer of the perpendicularity measuring ruler 37 to the zero position, and set the digital micrometer head 35 to zero. Rotate the digital micrometer head 35 back and forth 5 times in both directions from the zero position to align the pointer to the zero position, and record the zero deviation value of the pointer each time. Take the difference between the maximum and minimum values ​​as the variability of the indicated value of the perpendicularity measuring ruler 37 being calibrated.

[0053] 4. Verify the accuracy of the ruler's zero position:

[0054] Position the positioning post 47 of the verticality measuring ruler 37 on the upper end face of the lower base plate 13. The wide surface of the verticality measuring ruler 37 is in contact with the three support points of the long side of the upper base plate 11 and the lower base plate 13. Loosen the handles of the upper and lower side positioning devices. Under the action of the side positioning devices, the working surface of the measuring ruler is in contact with the zero position to calibrate the upper and lower support points. Read the deviation value at the zero position of the indicator of the verticality measuring ruler 37.

[0055] 5. Method for calibrating readings using a verticality measuring ruler:

[0056] Rotate the digital micrometer head 36 to zero the pointer on the perpendicularity measuring scale instrument panel, then set the differential head to zero, and then perform calibration according to the specifications. This is existing technology and will not be described in detail.

[0057] The readings on the indicator of the verticality measuring ruler 37 and the readings on the digital micrometer head 35 are shown in the table below.

[0058]

[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications made based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A calibration device for a verticality measuring ruler of a building engineering quality detector group, comprising a base and a column, characterized in that: The upper end of the base is provided with a guide shaft seat, the upper end of which is connected to the lower end of the column. An arc-shaped elongated hole is provided radially through the guide shaft seat, and a guide shaft is disposed within the arc-shaped elongated hole. A positioning cap is provided at the rear end of the guide shaft, and a guide shaft shoulder plate is provided at the front end. A lower through hole is provided radially through the guide shaft seat, with a reset mechanism and a digital display micrometer head respectively disposed at both ends of the lower through hole. The upper end of the column is connected to the lower end of the rotating shaft seat, and an upper through hole is provided radially through the rotating shaft seat. A central rotating shaft is provided, with a positioning cap at the rear end and a retainer at the front end. The two ends of the verticality measuring scale are connected to the guide shaft shoulder plate and the retainer, respectively. Under the action of the reset mechanism and the digital display micrometer head, it can swing left and right around the central rotating shaft to calibrate the indication error of the verticality measuring scale. An upper base plate and a lower base plate are provided on the rotating shaft seat and the guide shaft seat, respectively. The two ends of the reference surface of the verticality measuring scale are connected to the upper base plate and the lower base plate, respectively, to achieve zero-position calibration of the verticality measuring scale.

2. The verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: The guide shaft shoulder plate has a positioning shaft hole and a lower support point for indication calibration on its end face. A radial threaded hole is provided through the wall of the positioning shaft hole, and a ball set screw is provided in the radial threaded hole. The casing has a U-shaped structure, and an upper support point for indication calibration is provided on the bottom and the inner surface of the left side wall. A threaded hole is provided on the right side wall of the casing, and a knurled hand screw is screwed into the threaded hole. A positioning shoulder shaft is provided in the inner hole of the left end of the knurled hand screw. Rotating the knurled hand screw realizes the positioning and installation of the verticality measuring ruler.

3. The verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: The two ends of the central rotating shaft are rotatably connected to the upper through hole through bearings, and a spacer is fitted on the central rotating shaft between the bearings on both sides. The positioning cap is fixed to the rear end of the central rotating shaft by positioning screws, and the card holder and the front end of the central rotating shaft are provided with card holder positioning screws.

4. The verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: The two ends of the guide shaft are slidably mounted to the arc-shaped elongated hole via bearings, and a spacer is fitted on the guide shaft between the bearings on both sides. The positioning cap is fixed to the rear end of the guide shaft by positioning screws. A guide wheel is provided in the middle of the spacer, and the outer circular surface of the guide wheel has an arc-shaped structure.

5. A verticality measuring ruler calibration device for a building engineering quality detector group according to claim 4, characterized in that: The lower through hole has a two-section structure. The reset mechanism is located in the lower through hole at the left end, and the digital micrometer head is located in the lower through hole at the right end. The reset mechanism includes a fixed sleeve, an adjusting screw, a reset spring, and a push rod. The right end of the fixed sleeve is connected to the lower through hole at the left end. The left end of the fixed sleeve has a threaded hole in which the adjusting screw is screwed. The push rod is located in the inner hole of the fixed sleeve, and the two are in sliding fit. The reset spring is located between the push rod and the adjusting screw. The right end of the push rod is in contact with the outer circular surface of the guide wheel. The left end of the digital micrometer head is connected to the lower through hole at the right end. The measuring working surface of the digital micrometer head is in contact with the outer circular surface of the guide wheel under the action of the reset mechanism.

6. The verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: The lower end of the guide shaft seat is provided with a flange, which is fixed to the base by fastening screws. The lower end of the base is provided with support feet at intervals. The support feet are adjustable and can adjust the horizontal state of the calibration device.

7. The verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: The upper substrate and the lower substrate are respectively connected to the rotating shaft seat and the guide shaft seat by substrate positioning screws. The substrate positioning screws are spaced apart, with at least two screws.

8. A verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: Both the upper and lower substrates are L-shaped structures, with their long sides respectively mounted and positioned on the mounting surfaces of the rotating shaft seat and the guide shaft seat. Zero-position calibration upper support points are provided on the inner surfaces of the short and long sides of the upper substrate, and a zero-position calibration lower support point is provided on the inner surface of the long side of the lower substrate. A spherical fine-tuning screw is provided on the inner surface of the short side of the lower substrate as an adjustable zero-position calibration lower support point. A set screw is provided perpendicular to the spherical fine-tuning screw to position and adjust the spherical fine-tuning screw.

9. A verticality measuring ruler calibration device for a building engineering quality detector group according to claim 1, characterized in that: A zero-position calibration side positioning mechanism is respectively provided on the upper substrate and the lower substrate. The zero-position calibration side positioning mechanism includes a mounting base, a positioning rod, and a top pressure spring. The mounting base is connected to the upper substrate or the lower substrate by mounting screws. The mounting base is provided with a through hole. The positioning rod and the top pressure spring are disposed in the through hole. The right end of the through hole is blocked by a plug. The left end of the positioning rod extends out from the left end of the through hole under the action of the top pressure spring. The mounting base is provided with a strip groove and a limiting groove. A handle is provided in the strip groove. The lower end of the handle is connected to the positioning rod and can drive the positioning rod to move left and right.

10. A calibration device for a verticality measuring ruler of a building engineering quality detector group according to claim 1, characterized in that: The calibration device adopts a pendulum structure, with the center line of the central rotating shaft for positioning. The distance R between the pendulum and the guide shaft axis is used as the calibration reference for installing the measuring scale. The digital micrometer head reciprocates under the action of the guide shaft reset mechanism to realize the angular displacement of the perpendicularity measuring scale. The digital micrometer head is given a moving distance value, and the corresponding point values ​​are read from the perpendicularity measuring scale indicator.

Images