High-precision measuring device for surface flatness of pipe

Abstract

The invention relates to a high-precision measuring device for the surface flatness of a pipe, and the device comprises an equipment housing, the lower side of the equipment housing is provided with a measuring cavity, and a bottom plate at one side in the measuring cavity is fixedly provided with a supporting cross rod for the installation of a to-be-measured pipe. A fastening mechanism, a measuring mechanism and a display screen are further arranged on the equipment shell, and the display screen is electrically connected with the measuring mechanism; from pipe fixing and clamping, a fastening mechanism and a torsion clamping device are matched up and down, so that a to-be-tested pipe can be stably mounted on a supporting cross rod, the measurement stability is ensured, and test data can be more accurate; under the driving of a fastening transmission wheel in the fastening mechanism, the pipe can move left and right, continuous reading can be achieved through cooperation with the measuring mechanism, convenience and rapidness are achieved, the time for manually intercepting multiple segments and recording and calculating data is saved, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering detection equipment, in particular to a high-precision measuring device for the surface flatness of a pipe. Background Art

[0002] In the inspection of construction projects, the minimum, maximum and average wall thickness of the geometric dimensions of pipes and fittings need to be inspected. In the past, the measurement method often took a section of pipe to be cut manually, and the wall thickness was measured manually at each selected section using a vernier caliper at least 6 points evenly spaced along the circumference, with an accuracy of 0.01mm.

[0003] A certain length of pipe needs to be cut several times and then measured repeatedly, which is time-consuming and laborious. Moreover, the data measured by this manual method is random, and it is impossible to accurately measure the maximum and minimum wall thickness points on the measured sample, nor can it measure the continuous trend characteristics of the wall thickness data. Therefore, it needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the deficiencies in the prior art, a high-precision measuring device for the surface flatness of a pipe is provided.

[0005] The technical solution adopted by the present invention is: a high-precision measuring device for the surface flatness of a pipe, comprising a device housing, a measuring cavity is arranged at the lower side of the device housing, a supporting cross bar for installing the pipe to be measured is fixedly installed at the bottom plate on one side of the measuring cavity, a fastening mechanism, a measuring mechanism and a display screen are also arranged on the device housing, and the display screen is electrically connected to the measuring mechanism;

[0006] The measuring mechanism comprises a fixed grid mounted on the device housing, a moving grid is slidably connected to the fixed grid, a sliding rod is fixedly connected to the moving grid, a test wheel is arranged on the lower end of the sliding rod, a first contact is arranged on the sliding rod, two springs are connected to the first contact, and the other ends of the two springs are respectively connected to second contacts located at the lower left and lower right of the first contact, so that the two springs give the sliding rod a vertical downward pre-tightening force;

[0007] By adopting the above technical solution, the test wheel is in close contact with the upper surface of the pipe to be tested under the action of the spring. When the pipe moves, the test wheel moves up and down under the action of the spring due to the different wall thickness of the pipe. The slide bar will drive the moving grid to move up and down on the fixed grid. The moving grid has built-in chips and capacitive grid sensors. The mechanical displacement data is obtained through the change of capacitance generated by the movement between the moving and fixed grids, and finally displayed on the display screen.

[0008] The fastening mechanism comprises a rotating pressure plate rotatably connected in the device housing, a hand wheel assembly, a connecting rod assembly, a driving motor and a fastening transmission wheel;

[0009] The connecting rod assembly includes two left and right vertical rods connected to the rotating pressure plate, the lower ends of the vertical rods are connected to pressure rods extending forward, the rear ends of the pressure rods are provided with a driving motor, and the front ends of the pressure rods are rotatably connected to a fastening transmission wheel.

[0010] Furthermore, the pressure rod of the present invention is a hollow structure, and the output end of the driving motor is drivingly connected to the fastening transmission wheel through a rotating shaft inside the pressure rod;

[0011] By adopting the above technical solution, the pipe can be driven to move left and right, and the measuring mechanism can be used to continuously detect and read the data, which is convenient and fast.

[0012] Furthermore, the handwheel assembly of the present invention comprises a handwheel turntable rotatably mounted on a groove of a side wall of the equipment housing, and the handwheel turntable is connected to an upper end of one side of the rotating pressure plate through a pull rod;

[0013] By adopting the above technical solution, the operating hand wheel turntable can drive the rotating pressure plate to press down or move up through the pull rod, so as to tighten the transmission wheel to press or loosen the pipe to be tested.

[0014] Furthermore, a plurality of rollers are equidistantly and movably embedded on the support crossbar of the present invention, and the rollers protrude from the upper surface of the support crossbar to facilitate left and right sliding of the pipe to be tested.

[0015] Furthermore, the lower end of the support crossbar of the present invention is equidistantly provided with a plurality of torsion clamping devices, the torsion clamping device comprising a connecting shaft mounted on the support crossbar, a rotating arm movably connected to the connecting shaft through a torsion spring, a clamping wheel connected to the lower end of the rotating arm, and a pre-tightening pressure applied by the torsion spring to the rotating arm and the clamping wheel to press them downward;

[0016] By adopting the above technical solution, the stability of the connection of the pipe to be tested is ensured, so that the measuring point does not deviate.

[0017] Furthermore, the device housing described in the present invention is also provided with a vertical slot for the pressure rod to extend and move up and down.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. From the perspective of pipe fixing and clamping, the fastening mechanism and torque clamping device are used to cooperate with each other so that the pipe to be tested can be stably installed on the supporting crossbar, ensuring the stability of the measurement and making the test data more accurate;

[0020] 2. Driven by the fastening drive wheel in the fastening mechanism, the pipe can move left and right, and the measuring mechanism can read the data continuously, which is convenient and fast;

[0021] 3. It can find the maximum and minimum wall thickness points on the pipe more objectively and accurately, saving the time of manually intercepting multiple sections and recording and calculating data, and improving the detection efficiency;

[0022] 4. Avoid numerical errors caused by manual measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the cooperation between the fastening mechanism and the measuring mechanism in the present invention;

[0025] Figure 3 is a structural schematic diagram showing the fastening mechanism from another perspective in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the torque clamping device in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the moving grid and the fixed grid in the measuring mechanism of the present invention from another perspective.

[0028] Numbers in the figure: 1. shell; 2. measuring cavity; 3. bottom plate; 4. supporting cross bar; 5. display screen; 6. fixed grid; 7. moving grid; 8. sliding bar; 9. test wheel; 10. first contact point; 11. spring; 12. second contact point; 13. rotating pressure plate; 14. driving motor; 15. fastening transmission wheel; 16. vertical rod; 17. pressure rod; 18. slot; 19. hand wheel turntable; 20. pull rod; 21. roller; 22. connecting shaft; 23. torsion spring; 24. rotating arm; 25. clamping wheel; 26. vertical slot; 27. pipe to be tested. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below. The embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0030] like Figure 1 to Figure 5 A high-precision measuring device for the surface flatness of a pipe is shown, comprising a device housing 1, a measuring cavity 2 is arranged at the lower side of the device housing 1, a supporting crossbar 4 for mounting the pipe to be measured is fixedly installed at a bottom plate 3 on one side of the measuring cavity 2, a fastening mechanism, a measuring mechanism and a display screen 5 are also arranged on the device housing 1, and the display screen 5 is electrically connected to the measuring mechanism;

[0031] The measuring mechanism includes a fixed grid 6 installed on the device housing 1, a moving grid 7 is slidably connected to the fixed grid 6, a sliding rod 8 is fixedly connected to the moving grid 7, a test wheel 9 is arranged on the lower end of the sliding rod 8, a first contact 10 is arranged on the sliding rod 8, two springs 11 are connected to the first contact 10, and the other ends of the two springs 11 are respectively connected to second contacts 12 located at the lower left and lower right of the first contact 10, so that the two springs 11 give the sliding rod 8 a vertical downward pre-tightening tension;

[0032] The fastening mechanism includes a rotating pressure plate 13 rotatably connected to the device housing 1, a hand wheel assembly, a connecting rod assembly, a driving motor 14 and a fastening transmission wheel 15;

[0033] The connecting rod assembly includes two left and right vertical rods 16 connected to the rotating pressure plate 13. The lower ends of the vertical rods 16 are connected to pressure rods 17 extending forward. The rear end of the pressure rod 17 is provided with a driving motor 14, and the front end of the pressure rod 17 is rotatably connected to a fastening transmission wheel 15.

[0034] The pressure rod 17 is a hollow structure, and the output end of the driving motor 14 is drivingly connected to the fastening transmission wheel 15 via a rotating shaft inside the pressure rod 17 .

[0035] The handwheel assembly includes a handwheel turntable 19 rotatably mounted on a slot 18 on the side wall of the device housing 1 . The handwheel turntable 19 is connected to an upper end of one side of the rotating pressure plate 13 via a pull rod 20 .

[0036] A plurality of rollers 21 are equidistantly and movably embedded on the support crossbar 4, and the rollers 21 protrude from the upper surface of the support crossbar 4. A plurality of torsion clamping devices are equidistantly arranged at the lower end of the support crossbar 4, and the torsion clamping device comprises a connecting shaft 22 mounted on the support crossbar 4, and a rotating arm 24 is movably connected to the connecting shaft 22 through a torsion spring 23, and a clamping wheel 25 is connected to the lower end of the rotating arm 24, and the torsion spring 23 gives a pre-tightening pressure to the rotating arm 24 and the clamping wheel 25 to press downward.

[0037] The device housing 1 is also provided with a vertical slot 26 for the pressure rod 17 to extend and move up and down.

[0038] Working principle:

[0039] The pipe 27 to be tested is inserted into the support cross bar 4 from the left end of the equipment. The roller 21 on the support cross bar 4 and the clamping wheel 25 work together to keep the pipe stable without deviation. The hand wheel turntable 19 is operated to drive the rotating pressing plate 13 to press down. The rotating pressing plate 13 drives the connecting rod assembly and the fastening transmission wheel 15 to press down, so that the fastening transmission wheel 15 is pressed tightly against the upper surface of the pipe 27 to be tested. At the same time, the test wheel is also pressed tightly against the upper surface of the pipe 27 to be tested under the action of the spring.

[0040] The driving motor 14 is controlled so that the fastening transmission wheel 15 can drive the pipe 27 to be tested to move left and right. At this time, the test wheel 9, under the action of the spring 11, moves up and down due to the different wall thickness of the pipe. The slide bar 8 will drive the moving grid 7 to move up and down on the fixed grid 6. The moving grid 7 has a built-in chip and a capacitive grid sensor. The mechanical displacement data is obtained by the change of capacitance generated by the movement between the moving and fixed grids, and finally the measured wall thickness value and the measurement curve are displayed on the display screen 5.

Claims

1. A high-precision measuring device for the surface flatness of a pipe, characterized in that: The device comprises a device housing (1), a measuring cavity (2) is arranged at the lower side of the device housing (1), a supporting cross bar (4) for mounting a pipe to be measured is fixedly installed at a bottom plate (3) on one side of the measuring cavity (2), and a fastening mechanism, a measuring mechanism and a display screen (5) are also arranged on the device housing (1), and the display screen (5) is electrically connected to the measuring mechanism; The measuring mechanism comprises a fixed grid (6) mounted on the device housing (1), a moving grid (7) being slidably connected to the fixed grid (6), a sliding rod (8) being fixedly connected to the moving grid (7), a test wheel (9) being arranged on the lower end of the sliding rod (8), a first contact (10) being arranged on the sliding rod (8), two springs (11) being connected to the first contact (10), and the other ends of the two springs (11) being respectively connected to second contacts (12) located at the lower left and lower right of the first contact (10), so that the two springs (11) give the sliding rod (8) a vertical downward pre-tightening force; The fastening mechanism comprises a rotating pressure plate (13) rotatably connected in the device housing (1), a hand wheel assembly, a connecting rod assembly, a driving motor (14) and a fastening transmission wheel (15); The connecting rod assembly comprises two left and right vertical rods (16) connected to the rotating pressure plate (13); the lower ends of the vertical rods (16) are connected to pressure rods (17) extending forward; the rear ends of the pressure rods (17) are provided with a driving motor (14); and the front ends of the pressure rods (17) are rotatably connected to a fastening transmission wheel (15).

2. A high-precision measuring device for pipe surface flatness according to claim 1, characterized in that: The pressure rod (17) is a hollow structure, and the output end of the driving motor (14) is drivingly connected to the fastening transmission wheel (15) via a rotating shaft inside the pressure rod (17).

3. A high-precision measuring device for the surface flatness of a pipe as claimed in claim 1, characterized in that: The handwheel assembly comprises a handwheel turntable (19) rotatably mounted on a slot (18) on the side wall of the equipment housing (1); the handwheel turntable (19) is connected to an upper end of one side of the rotating pressure plate (13) via a pull rod (20).

4. A high-precision measuring device for the surface flatness of a pipe as claimed in claim 1, characterized in that: A plurality of rollers (21) are equidistantly and movably embedded on the support crossbar (4), and the rollers (21) protrude from the upper surface of the support crossbar (4).

5. A high-precision measuring device for the surface flatness of a pipe as claimed in claim 1, characterized in that: A plurality of torsion clamping devices are equidistantly arranged at the lower end of the supporting cross bar (4), and the torsion clamping device comprises a connecting shaft (22) mounted on the supporting cross bar (4), and a rotating arm (24) is movably connected to the connecting shaft (22) through a cooperating torsion spring (23), and a clamping wheel (25) is connected to the lower end of the rotating arm (24), and the torsion spring (23) applies a pre-tightening pressure to the rotating arm (24) and the clamping wheel (25) to tighten the rotating arm (24) and the clamping wheel (25).

6. A high-precision measuring device for the surface flatness of a pipe as claimed in claim 1, characterized in that: The device housing (1) is also provided with a vertical slot (26) for the pressure rod (17) to extend and move up and down.

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