CN212228000U

CN212228000U - Wall thickness measuring instrument

Info

Publication number: CN212228000U
Application number: CN202021349644.9U
Authority: CN
Inventors: 丁菊; 刘书宏; 袁奕雯
Original assignee: Shanghai Special Equipment Supervision and Inspection Technology Institute
Current assignee: Shanghai Special Equipment Supervision and Inspection Technology Institute
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-12-25
Anticipated expiration: 2030-07-10

Abstract

The utility model provides a wall thickness measuring instrument, include the bracing piece and set up in the transmitting element and the detection unit of bracing piece. The supporting rod is arranged on a base platform and comprises a first part, a second part and a third part, wherein the first part, the second part and the third part are upwards arranged from the base platform, one end of the first part is fixed on the base platform, the other end of the first part is connected with one end of the second part through an inclined shaft, the other end of the second part is connected with the third part through a rotating shaft, and the third part is provided with a sliding rail groove. The emission unit includes first slider, first connecting rod and ray machine, and first slider sets up in the slide rail groove, and first connecting rod runs through first slider and ray machine setting is in the one end of first connecting rod. The detection unit comprises a second sliding block, a second connecting rod and a ray detector, the second sliding block is arranged in the sliding rail groove, and the second connecting rod penetrates through the second sliding block and the ray detector and is arranged at one end of the second connecting rod. Wherein the emission unit and the detection unit are arranged at two sides of the rotating shaft, and the ray machine and the ray detector are arranged at the same side of the supporting rod.

Description

Wall thickness measuring instrument

Technical Field

The utility model relates to a wall thickness measurement technical field especially relates to a wall thickness measuring apparatu.

Background

The wall thickness measuring instrument is a main instrument for measuring the thickness, and is widely applied to the fields of petroleum, chemical engineering, metallurgy, shipbuilding, aviation, aerospace and the like. In the prior art, the thickness of a workpiece to be measured is generally measured by using an ultrasonic pulse reflection principle, when an ultrasonic pulse emitted by a probe of a wall thickness measuring instrument reaches a material interface of the workpiece to be measured, the ultrasonic pulse is reflected back to the probe, and the wall thickness measuring instrument determines the thickness of the workpiece to be measured by accurately measuring the propagation time of the ultrasonic wave in the material.

However, since the conventional wall thickness measuring instrument usually uses the ultrasonic pulse reflection principle to perform thickness measurement, the material for manufacturing the workpiece to be measured must be a good conductor of ultrasonic waves, such as metal, plastic, ceramic, glass fiber, and the like, and therefore, the thickness of the workpiece made of other materials cannot be accurately measured. In addition, the prior art also has the defects of small measurement area, incapability of adapting to limit working conditions (such as high temperature and low temperature) and the like.

Disclosure of Invention

An object of the utility model is to provide a wall thickness measuring apparatu, accurate measurement under the condition of the work piece that awaits measuring of contactless the thickness of work piece that awaits measuring to realize the wall thickness measurement under extreme operating mode (for example high temperature, low temperature) or not the state of doing work.

In order to achieve the above object, the utility model provides a wall thickness measuring instrument, include:

the supporting rod is arranged on a base platform and comprises a first part, a second part and a third part which are upward from the base platform, one end of the first part is fixed on the base platform, the other end of the first part is connected with one end of the second part through a tilting shaft, the other end of the second part is connected with the third part through a rotating shaft, and the third part is provided with a slide rail groove;

the emission unit comprises a first sliding block, a first connecting rod and an ray machine, wherein the first sliding block is arranged in the sliding rail groove, the first connecting rod penetrates through the first sliding block, and the ray machine is arranged at one end of the first connecting rod;

the detection unit comprises a second sliding block, a second connecting rod and a ray detector, the second sliding block is arranged in the sliding rail groove, the second connecting rod penetrates through the second sliding block, and the ray detector is arranged at one end of the second connecting rod;

the radiation machine and the radiation detector are arranged on the same side of the supporting rod.

Optionally, one end of the first connecting rod is provided with a clamp, and the ray machine is clamped by the clamp.

Optionally, one end of the second connecting rod is provided with a detector platform, and the detector is fixed through the detector platform.

Optionally, the wall thickness measuring instrument further comprises a controller connected to the radiation detector.

Optionally, the second connecting rod is hollow, and a connecting wire of the radiation detector passes through the inside of the second connecting rod and is connected with the controller.

Optionally, the controller processes the image result transmitted by the ray detector by using an edge method.

Optionally, the bracing piece with the rotation axis the junction of inclining the axle all is provided with screw thread or insection, the rotation axis with incline the axle and be stud, and all fix through nut and gasket on the bracing piece.

Optionally, the first slider and the second slider are both provided with threaded holes and are both fixed on the slide rail groove through bolts.

Optionally, the first slider and the second slider are both provided with threaded through holes, and the first connecting rod and the second connecting rod are both provided with threads matched with the threaded through holes.

Optionally, the support rod, the first slider and the second slider are made of aluminum alloy.

Optionally, scales are arranged on the slide rail groove.

Optionally, the base station is provided with a bolt hole for mounting the support rod, and one end of the first portion is provided with a thread matched with the bolt hole.

Optionally, a plurality of leveling bolts are circumferentially arranged on the base platform.

Optionally, a level gauge is arranged on the base.

Optionally, the ray machine comprises a miniature high-frequency ray machine or a pulse ray machine, the tube voltage of the ray machine is greater than or equal to 90kV, the penetrating power is greater than 10mm steel, and the weight of the ray machine is less than or equal to 6 kg.

Optionally, the pixel size of the ray detector is less than or equal to 150 μm, the gray scale is 14bit, and the spatial resolution is greater than or equal to 41 p/mm.

To sum up, the utility model provides a wall thickness measuring instrument, include the bracing piece and set up in the transmitting element and the detection unit of bracing piece. The support rod is arranged on a base platform and comprises a first part, a second part and a third part, wherein the first part, the second part and the third part are arranged upwards from the base platform, one end of the first part is fixed on the base platform, the other end of the first part is connected with one end of the second part through a tilting shaft, the other end of the second part is connected with the third part through a rotating shaft, and the third part is provided with a slide rail groove. The emission unit comprises a first sliding block, a first connecting rod and an ray machine, the first sliding block is arranged in the sliding rail groove, the first connecting rod penetrates through the first sliding block, and the ray machine is arranged at one end of the first connecting rod. The detection unit comprises a second sliding block, a second connecting rod and a ray detector, the second sliding block is arranged in the sliding rail groove, and the second connecting rod penetrates through the second sliding block and the ray detector is arranged at one end of the second connecting rod. The radiation machine and the radiation detector are arranged on the same side of the supporting rod. The utility model provides a wall thickness measuring apparatu's measurement area is great, but accurate positioning the minimum thickness position of work piece that awaits measuring to through image format output measurement result, subsequent record and the work of verifying of being convenient for. Meanwhile, the wall thickness measuring instrument has low requirements on the material and the working environment of the workpiece to be measured, and can accurately measure the thickness of the workpiece to be measured under the condition of not contacting the workpiece to be measured so as to realize wall thickness measurement under extreme working conditions (such as high temperature and low temperature) or under a non-stop state. In addition, the wall thickness measuring instrument also has the characteristics of easiness in disassembly, low use cost and the like.

Drawings

Fig. 1 is a schematic structural diagram of a wall thickness measuring instrument provided in this embodiment;

fig. 2 is a schematic view of the wall thickness measuring instrument provided in this embodiment for measuring a workpiece to be measured;

FIG. 3 is a schematic view of the wall thickness measuring instrument of FIG. 2 after adjustment of the rotation axis;

FIG. 4 is a schematic view of the wall thickness gauge of FIG. 2 after adjustment of the tilt axis;

wherein the reference numbers are as follows:

1-base station; 2-a level meter; 3-leveling bolts; 4-a support bar; 5-a rotating shaft; 6-inclined axis; 7-a first slider; 8-a first link; 9-ray machine; 10-a second slide; 11-a second link; 12-a radiation detector; 13-a detector platform; 14-connecting lines; 15-a controller; 16-workpiece to be measured.

Detailed Description

The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Fig. 1 is a schematic structural diagram of the wall thickness measuring instrument provided in this embodiment. In this embodiment, the wall thickness measuring instrument includes a support rod 4, and an emitting unit and a detecting unit disposed on the support rod 4. The support rod 4 is arranged on the base platform 1 and comprises a first part, a second part and a third part, wherein the first part, the second part and the third part are upwards arranged from the base platform 1, one end of the first part is fixed on the base platform 1, the other end of the first part is connected with one end of the second part through a tilting shaft 6, the other end of the second part is connected with the third part through a rotating shaft 5, and the third part is provided with a slide rail groove. The emitting unit comprises a first sliding block 7, a first connecting rod 8 and an ray machine 9, the first sliding block 7 is arranged in the sliding rail groove, the first connecting rod 8 penetrates through the first sliding block 7, and the ray machine 9 is arranged at one end of the first connecting rod 8. The detection unit comprises a second sliding block 10, a second connecting rod 11 and a ray detector 12, the second sliding block 10 is arranged in the sliding rail groove, the second connecting rod 11 penetrates through the second sliding block 10, and the ray detector 12 is arranged at one end of the second connecting rod 11. The emitting unit and the detecting unit are respectively arranged at two sides of the rotating shaft 5, and the ray machine 9 and the ray detector 12 are arranged at the same side of the supporting rod 4. The specific structure of the wall thickness measuring instrument is described in detail below with reference to fig. 1.

Referring to fig. 1, the support rod 4 is vertically disposed on the base 1. The base platform 1 is provided with a threaded hole, one end of the third portion is provided with threads matched with the threaded hole, and the support rod 4 is connected with the base platform 1 through threads. In other embodiments of the present invention, the base 1 and the support rod 4 can be connected in other ways, such as a buckle, and the present invention is not limited thereto. A plurality of leveling bolts 3 are circumferentially arranged on the base platform 1, and specifically, four leveling bolts 3 are circumferentially arranged on the base platform 1 in this embodiment. In other embodiments of the present invention, the number and the distribution of the leveling bolts 3 can be adjusted according to actual needs, and the present invention is not limited thereto. The base station 1 is also provided with a level gauge 2. In this embodiment, the level 2 is a high-precision level for angle control and biaxial 360 ° measurement, and the resolution of the level 2 is not less than 0.1 ° and the precision is not less than 0.01 °. When the wall thickness measuring instrument is used for measuring the workpiece 16 to be measured, the level 2 is required to measure whether the base platform 1 is in a horizontal state. If the base platform 1 is not in a horizontal state, the base platform 1 needs to be adjusted to the horizontal state by using the leveling bolts 3 so as to ensure the accuracy of wall thickness measurement.

Referring to fig. 1 and 3, one end of the first portion of the support bar 4 is connected to one end of the second portion by a tilt shaft 6 so as to adjust the angle between the first portion and the second portion and to expand the measurement range of the wall thickness measuring instrument. The middle position of the third part is connected with one end of the second part through the rotating shaft 5, and the third part can rotate by taking the rotating shaft 5 as a rotating center, so that the side turning of the wall thickness measuring instrument in the embodiment caused by excessive gravity center shift in the process of rotating the third part is prevented, and the measuring range of the wall thickness measuring instrument is expanded. In other embodiments of the present invention, the specific position where the third portion is connected to the second portion can be adjusted according to actual needs, and the present invention is not limited thereto. The connection part of the support rod 4, the rotating shaft 5 and the inclined shaft 6 is provided with threads or insections. Alternatively, the rotating shaft 5 and the tilting shaft 6 are both stud bolts, and the three parts of the support rod 4 are fixed by nuts and washers. In other embodiments of the present invention, the connection mode between the support rod 4 and the rotation shaft 5 and the inclined shaft 6 can be adjusted according to actual needs, and the present invention is not limited thereto. The support rod 4 comprises a prism or a cylinder, and the width or the diameter of the support rod 4 is more than or equal to 2mm, so that the normal use of the wall thickness measuring instrument is ensured. The third portion of the support bar 4 is provided with a slide groove on which the first slider 7 and the second slider 10 can slide so as to adjust the distance between the emitting unit and the detecting unit, thereby expanding the detection range. The inside of the slide groove is through, and is not affected by the rotating shaft 5. And scale marks are arranged on the slide rail groove, so that the distance between the transmitting unit and the detecting unit can be conveniently measured and calculated. Threaded holes are formed in the first sliding block 7 and the second sliding block 10, so that the first sliding block 7 and the second sliding block 10 are fixed to proper positions of the guide rail groove through bolts after a measuring area is determined according to a workpiece 16 to be measured, and the first sliding block 7 or (and) the second sliding block 10 are prevented from sliding in the measuring process, and further measuring results are prevented from being influenced. In other embodiments of the present invention, the threaded hole and the bolt may be replaced with a bolt or the like to fix the first slider 7 and the second slider 10, which is not limited by the present invention. The support rod 4, the first slider 7 and the second slider 10 are all made of an aluminum alloy material. During the use of the wall thickness measuring instrument, the distance between the first slider 7 and the second slider 10 can be calculated according to the positions of the upper ends (or the lower ends) of the first slider 7 and the second slider 10 on the scale lines of the support rod 4.

In the emitting unit and the detecting unit, the first link 8 and the second link 11 penetrate the first slider 7 and the second slider 10, respectively. In this embodiment, the first slider 7 and the second slider 10 are both provided with threaded through holes, the first link 8 and the second link 11 are both provided with threads, and the first link 8 passes through the threaded through hole of the first slider 7; the second connecting rod 11 passes through the threaded through hole of the second sliding block 10, so that the first connecting rod 8 and the second connecting rod 11 can be adjusted and fixed. In other embodiments of the present invention, the first slider 7 and the first connecting rod 8, the second slider 10 and the second connecting rod 11 may be connected by a buckle, welding and other methods, which is not limited by the present invention. In this embodiment, the diameters of the first connecting rod 8 and the second connecting rod 11 are greater than or equal to 10 mm. As shown in fig. 1, one end of the first link 8 is connected to a clamp, which clamps the ray machine 9. The ray machine 9 is a miniature high-frequency ray machine or a pulse ray machine, the tube voltage of the ray machine 9 is more than or equal to 90kV, the penetrating power of the ray machine 9 is more than 10mm steel, and the weight of the ray machine 9 (containing a storage battery) is less than or equal to 6 kg.

One end of the second connecting rod 11 is provided with a detector platform 13 for placing the ray detector 12. In this embodiment, the detector platform 13 is a rectangular frame with a hollow bottom, so that the radiation detector 12 can be fixed and cooled conveniently. Optionally, the detector platform 13 is made of an aluminum alloy material. In the utility model discloses in other embodiments, detector platform 13 can be for other be convenient for place the shape of ray detector 12, the preparation material of detector platform 13 also can be other materials that the heat conductivity is good. The radiation detector 12 comprises a small flat panel detector facilitating assembly, disassembly and transportation of the wall thickness gauge. The pixel size of the ray detector 12 is less than or equal to 150 mu m, the gray scale is 14bit, and the spatial resolution is more than or equal to 41 p/mm. In this embodiment, the ray machine 9 and the ray detector 12 are on the same vertical line and the same with the distance of the support rod 4, in other embodiments of the present invention, the ray machine 9 and the ray detector 12 may be different relative to the position of the support rod 4, and the present invention is not limited to this. The radiation detector 12 is connected to a controller 15 via a connecting line 14. In this embodiment, the second link 11 is hollow, and the connection wire 14 passes through the inside of the second link 11, so as to prevent the connection wire 14 from being wound around other parts or damaged. The controller 15 includes a micro palm computer, and is configured to read the detection result of the radiation detector 12 to perform thickness measurement. In this embodiment, the controller 15 processes the image result obtained by the radiation detector 12 by using an edge method, so as to obtain the wall thickness of the workpiece 16 to be measured. The controller 15 may be held by an operator, or a controller platform may be attached to the wall thickness gauge to position the controller 15.

Before the wall thickness measuring instrument is used for measuring the workpiece 16 to be measured and after the measurement is finished, the wall thickness measuring instrument needs to be calibrated by using a standard test block. The standard test block comprises a step-type cylindrical test block, and the diameter of each step cylinder of the standard test block is known. By measuring the standard test block, calibrating the actual size of each pixel point representation measured by the wall thickness measuring instrument, and then measuring the workpiece 16 to be measured, the actual thickness of the workpiece 16 to be measured can be obtained. As shown in fig. 2, in the present embodiment, the workpiece 16 to be measured is a circular pipe. When using the wall thickness measuring device, the rotation axis 5 or the tilting axis 6 can be adjusted according to the location to be measured so that the third portion of the support bar 4 is parallel to the measuring area. The level 2 is then observed and the leveling bolts 3 are controlled so that the base 1 is kept horizontal. The ray machine 9 and the ray detector 12 are adjusted to a proper position through the first sliding block 7 and the second sliding block 10, so that the ray beam excited by the ray machine 9 is tangent to the workpiece 16 to be measured. On the premise of meeting the detection range, the distance between the ray machine 9 and the ray detector 12 is shortened as much as possible to reduce the excitation voltage, so that the transillumination time is shortened, and the radiation dose is reduced. Finally, the radiation detector 12 is activated to take measurements, the image presented in the controller 15 (not shown in fig. 2) is observed and the wall thickness is measured. In addition, as shown in fig. 3 and 4, wall thickness measurement of the side, bottom and top of the workpiece 16 to be measured can be achieved by adjusting the rotating shaft 5 and the tilting shaft 6. It should be noted that, in fig. 2 and fig. 4, a partial area of the third portion is covered by the second portion, and the third portion is fully shown in fig. 3.

The application of the wall thickness measuring instrument provided by the embodiment is described below by taking DN100 pipelines and glass fiber reinforced plastic pipelines as examples:

when the workpiece to be measured is a DN100 pipeline with a designed wall thickness of 6.3mm, a thickness of 40mm and a heat preservation effect, the wall thickness measuring instrument in the embodiment selects a high-performance pulse ray machine with a size of 268mm × 80mm × 100mm, a weight of about 6kg and a highest tube voltage of 150kV, and the ray detector selects a flat panel detector with an imaging area of 50mm × 100mm and a weight of about 2 kg. And adjusting the first sliding block and the second sliding block to enable the distance between the ray machine and the ray detector to be about 150 mm. Before the measurement starts and after the measurement ends, the wall thickness measuring instrument needs to be calibrated through a stepped cylindrical test block. In the measuring process, the supporting rod of the wall thickness measuring instrument is adjusted to be in a vertical state, the side wall thickness of the workpiece to be measured is measured, the third part of the supporting rod is adjusted to be in a horizontal state by using the rotating shaft, and the bottom wall thickness of the workpiece to be measured is measured. In the measurement result, the wall thickness of the bottom of the workpiece to be measured is 3.5mm and is smaller than the designed wall thickness, so that the workpiece to be measured is unqualified and needs to be replaced.

Work as the work piece that awaits measuring is during diameter 400mm, wall thickness 20 mm's FRP pipe way, because the glass steel material can't carry out the supersound thickness measurement, consequently can choose for use the utility model provides a wall thickness measuring apparatu carries out the wall thickness measurement. According to the corrosion mechanism, the wall thickness of the bottom of the pipeline is most easily reduced due to corrosion, so that the wall thickness of the bottom of the workpiece to be measured needs to be measured. And adjusting the first slide block and the second slide block of the wall thickness measuring instrument to enable the distance between the ray machine and the ray detector to be 230 mm. Before the start of the measurement and after the end of the measurement, the wall thickness measuring instrument needs to be calibrated by a glass fiber reinforced plastic test block. In the measuring process, firstly, the supporting rod of the wall thickness measuring instrument is adjusted to be in a vertical state, the diameters of an elbow, a reducer and a tee joint in the workpiece to be measured are measured, then, the third part of the supporting rod is adjusted to be in a horizontal state by using a rotating shaft, and the wall thickness of the bottom of the workpiece to be measured is measured. In the wall thickness measurement result obtained by the edge method, the wall thickness of the pipeline of the workpiece to be measured is 22.1mm to 25.3mm which is larger than the designed wall thickness, so that the workpiece to be measured can still be normally used without replacement.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. A wall thickness gauge, comprising:

2. A wall thickness gauge according to claim 1, wherein one end of the first link is provided with a clamp by which the ray machine is clamped.

3. The wall thickness measuring instrument according to claim 1, wherein one end of the second link is provided with a probe platform, and the probe is fixed by the probe platform.

4. The wall thickness gauge according to claim 1, further comprising a controller connected to the radiation detector.

5. The wall thickness measuring instrument according to claim 4, wherein the second link is hollow inside, and the connection line of the radiation detector is connected to the controller through the inside of the second link.

6. The wall thickness gauge according to claim 4, wherein the controller processes the image results transmitted by the radiation detector using an edge method.

7. The wall thickness measuring instrument according to claim 1, wherein the connection points of the support rod and the rotation shaft and the tilt shaft are provided with threads or insections, and the rotation shaft and the tilt shaft are both stud bolts and are fixed on the support rod by nuts and spacers.

8. The wall thickness measuring instrument according to claim 1, wherein the first slide block and the second slide block are each provided with a threaded hole and are each fixed to the slide rail groove by a bolt.

9. The wall thickness measuring instrument according to claim 1, wherein each of the first slider and the second slider is provided with a threaded through hole, and each of the first link and the second link is provided with a thread engaged with the threaded through hole.

10. The wall thickness gauge according to claim 1, wherein the support bar, the first slider and the second slider are made of aluminum alloy.

11. The wall thickness measuring instrument according to claim 1, wherein the slide groove is provided with a scale.

12. The wall thickness measuring instrument according to claim 1, wherein the abutment is provided with a bolt hole for mounting the support rod, and one end of the first portion is provided with a screw thread for fitting the bolt hole.

13. The wall thickness measuring instrument according to claim 12, wherein a plurality of leveling bolts are circumferentially provided on the base.

14. The wall thickness measuring instrument according to claim 13, wherein a level is provided on the base.

15. A wall thickness measuring apparatus according to claim 1, wherein the ray machine comprises a miniature high frequency or pulse ray machine, the tube voltage of the ray machine is 90kV or more, the penetration is greater than 10mm steel, and the weight of the ray machine is 6kg or less.

16. The wall thickness measuring instrument according to claim 1, wherein the pixel size of the ray detector is less than or equal to 150 μm, the gray scale is 14bit, and the spatial resolution is greater than or equal to 41 p/mm.