CN109085011B - Portable sampler for sampling micro-damage of in-service equipment - Google Patents
Portable sampler for sampling micro-damage of in-service equipment Download PDFInfo
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- CN109085011B CN109085011B CN201810960551.0A CN201810960551A CN109085011B CN 109085011 B CN109085011 B CN 109085011B CN 201810960551 A CN201810960551 A CN 201810960551A CN 109085011 B CN109085011 B CN 109085011B
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- cutter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Abstract
The invention relates to a portable sampler for sampling micro-loss of in-service equipment, which comprises a cutter, a host machine for driving the cutter to rotate, a swing unit for driving the cutter to swing, and a swing arm arranged between the swing unit and the cutter and used for converting the power of the swing unit into the swing power of the cutter. Compared with the prior art, the on-site micro-loss sampling device can rapidly sample micro-loss on site aiming at on-service equipment, and is short in sampling time, high in efficiency and controllable in sampling size. The sampler provided by the invention has the advantages of simple structure, small volume, light weight, convenience in carrying, simple fixing method and the like.
Description
Technical Field
The invention relates to the technical field of special equipment detection, in particular to a portable sampler for micro-loss sampling of in-service equipment.
Background
The problem that whether the material of special equipment in the fields of petrochemical industry, nuclear power and the like can still maintain the initial state or is degraded after running for several years becomes one of the key points of attention of people. The most effective method for evaluating the material state of the in-service equipment at present is field sampling, but large samples can not be taken on the in-service equipment, and only tiny samples can be taken. This requires only micro-damage sampling of the in-service equipment to make a micro-sample for small punch test or hydraulic bulge test. For example, the closest prior art for in-service equipment micro-sampling is also disclosed in the chinese patent literature: CN101308063A announces in-service equipment micro specimen spark-erosion wire cutting sampling device, including drive wheel and power, the device still includes leading wheel, wire electrode, flat plate holder, leading truck. The guide wheel and the guide frame are respectively fixed on a flat plate bracket, the flat plate bracket is fixed on the box body, and a transmission wheel driven by a pulse motor is also fixed on the box body; the electrode wire is sleeved on the guide wheel, the transmission wheel and the guide frame, and the electrode wire is arranged in a groove shape and protrudes out of the guide frame; and cutting the electrode wire on the lower surface of the surface layer of the service equipment in parallel, cutting the micro sample, and then vertically withdrawing.
From the in-service equipment micro-sample electrospark wire-electrode cutting sampling device, the in-service sampling of the special equipment is a basic guarantee for detecting the safety production in the fields of petrochemical industry and nuclear power. The micro-sample sampling technology of the in-service equipment is key equipment for sampling from the in-service equipment and is a bottleneck for limiting the development of the existing micro-sample testing technology towards the fast and efficient direction. Therefore, on one hand, a tiny sample can be taken from various in-service equipment such as pipelines, containers, spherical tanks and the like so as to carry out subsequent test analysis, and on the other hand, the rapid, convenient and efficient sampling is realized without causing great influence on the field production process. Therefore, new requirements are provided for the in-service equipment micro-damage metal sampler and the preparation method thereof in production practice.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a portable sampler which is convenient to install and sample and is used for sampling the micro-damage of in-service equipment.
The purpose of the invention can be realized by the following technical scheme: a portable sampler for sampling the micro-damage of in-service equipment is composed of a cutter, a main machine for driving said cutter to rotate, a swinging unit for driving said cutter to swing, and a swinging arm between said swinging unit and cutter for converting the power of swinging unit to the swinging power of cutter.
The cutter outer wall be globular, the lower part level and the opening of cutter, the inside cavity of cutter, the top of cutter is equipped with the handle of a knife, the handle of a knife sets up along the cutter axis.
The central angle corresponding to the cutter opening is larger than 180 degrees, and the radius of the cutter is 20-60 mm.
The main machine is arranged along the central axis of the cutter, a clamping block is arranged at the bottom of the main machine, the upper end of the cutter handle is fixed in the clamping block, the main machine is fixed on the swing arm through a fixing block and an adjusting block, and the cutter handle is cylindrical and can be installed in a round hole of the clamping block for fixing the cutter and locked.
The main machine is adjustable in position on the fixing block and the adjusting block, and the adjusting direction is along a straight line where the central axis of the cutter is located.
The main machine is perpendicular to the central axis of the cutter and fixedly installed on the swing arm, the main machine is connected with the converter, the converter is arranged along the central axis of the cutter, a fixture block is arranged at the bottom of the converter, the upper end of the cutter handle is fixed in the fixture block, the converter is fixed on the swing arm through a fixing block and an adjusting block, and the converter is used for changing the rotating angle and the rotating direction of the main machine. The knife handle is cylindrical and can be installed in a round hole of a fixture block for fixing the knife and locked.
The position of the converter on the fixed block and the adjusting block is adjustable, and the adjusting direction is along the straight line of the central axis of the cutter.
The swing unit comprises a fixed plate, a servo stepping motor and an axle support, wherein the servo stepping motor and the axle support are fixedly mounted on the fixed plate, a central shaft is arranged on the axle support, one end of the central shaft is fixedly connected with the lower end of the swing arm, and the other end of the central shaft is connected with the servo stepping motor through a coupler. The connection mode of the central shaft and the lower end of the swing arm can be flat keys, splines, interference fit, locking nuts or clamping plates and the like.
The central shaft is cylindrical, the length direction of the central shaft is perpendicular to the central axis of the cutter, the spherical center of the cutter is positioned on the extension line of the central shaft axis, and the vertical deviation and the left-right deviation are not more than 1 mm; the distance between the axis of the central shaft and the fixing plate is 15-50 mm, namely the distance between the cutter opening and the cutter spherical center is slightly larger than the distance between the axis of the central shaft and the fixing plate, so that the cutter opening can be in contact with a belt cutting device after the fixing plate is fixed.
A torque amplifier is arranged between the coupler and the central shaft, the effects of speed reduction and torque amplification are achieved, and the torque amplification factor is 25-120.
In order to prevent the host from being stuck in the cutting process, the current of the host is detected through a control system, when the current rises, the motion of the servo stepping motor is stopped, and when the current is normal, the servo stepping motor is restarted to continue working; and controlling the servo stepping motor in the cutting process to enable the feed angle velocity vector to be 0.1-2 degrees/second.
The working principle of the invention is as follows: the cutter uses its center pin to carry out high-speed rotation as the pivot under the drive of host computer, and the high-speed rotation of cutter can cut the surface of treating the sampling equipment, and swing unit drive swing arm swings, and at the wobbling in-process, the cutter swings along with the swing arm together, and the cutter has a relative displacement with the equipment of treating the sample, and the cutter cutting treats the sampling equipment when this displacement to can obtain the sample on treating the sampling equipment surface, and accomodate in the inside of cutter.
During installation, the components constituting the cutting movement unit of the cutting tool and the feed movement unit are prepared separately: the cutting tool is prepared, the cutting tool and a fixture block of the fixed cutting tool are positioned and then connected to a converter or a host machine, the converter is respectively connected with the host machine and a swing arm through the synergistic action of an adjusting block and a fixing block, or the host machine is connected with the swing arm through the synergistic action of the adjusting block and the fixing block, and the assembly of a cutting motion unit is completed; a central shaft is provided, the servo stepping motor and the torque amplifier are connected through a coupler and positioned with the fixed plate, the requirement of coaxiality is kept, and the central shaft, the torque amplifier and the swing arm are respectively connected to complete the assembly of the feeding motion unit; and programming a control program of the motion control unit, and respectively controlling the current of the host and the angular displacement and angular velocity vector of the servo stepping motor.
Compared with the prior art, the beneficial effects of the invention are embodied in the following aspects:
(1) the portable in-service equipment micro-damage metal sampler samples a unique spherical cutter, and the cutter is proved to be an excellent cutter suitable for micro-sample sampling in practice. The cutter takes off a spherical crown-shaped sample with the thickness of 2-7 mm and the diameter of the bottom surface of 20-50 mm for 60-80 minutes, and the power of a main machine is 750-1200 watts, so that the sampling time is short and the energy consumption is very low.
(2) The two motions of the sampling designed by the invention meet the function independent principle in the design, and the high-speed cutting motion and the feeding motion are independent and do not interfere with each other; therefore, after the fixed plate is fixed, the position of the swing arm is adjusted through the servo stepping motor, and sampling can be carried out at any angle within the range of 360 degrees; the sampling machine has simple structure, light weight and flexible operation.
Drawings
FIG. 1 is a schematic view of the structure of a sampler in accordance with embodiment 1;
FIG. 2 is a schematic view of the process flow of the installation of the sampler of example 1;
fig. 3 is a schematic structural diagram of the sampler in embodiment 2.
The device comprises a cutter 1, a fixture block 2, a fixture block 3, a converter 4, an adjusting block 5, a swing arm 6, a host 7, a servo stepping motor 8, a coupler 9, a fixing plate 10, a torque amplifier 11, a shaft support 12 and a central shaft 13.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
A portable sampler for sampling micro-loss of in-service equipment is structurally shown in figure 1 and comprises a cutter 1, a host 7 for driving the cutter 1 to rotate, a swinging unit for driving the cutter 1 to swing and a swinging arm 6 arranged between the swinging unit and the cutter 1 and used for converting power of the swinging unit into swinging power of the cutter 1, wherein during sampling, the host 7 drives the cutter 1 to rotate around a central axis thereof, and the swinging unit drives the cutter 1 to swing in a plane where the central axis thereof is located through the swinging arm 6, so that metal sampling is realized.
The outer wall of the cutter 1 is spherical, the lower part of the cutter 1 is horizontal and is provided with an opening, the inside of the cutter 1 is hollow, the top of the cutter 1 is provided with a cutter handle, and the cutter handle is arranged along the central axis of the cutter 1. The corresponding spherical center angle of the opening of the cutter 1 is larger than 180 degrees.
The position of the converter 4 on the fixed block 3 and the adjusting block 5 is adjustable, and the adjusting direction is along the straight line of the central axis of the cutter 1.
The swing unit comprises a fixing plate 10, a servo stepping motor 8 fixedly mounted on the fixing plate 10 and a shaft support 12, wherein a central shaft 13 is arranged on the shaft support 12, one end of the central shaft 13 is fixedly connected with the lower end of the swing arm 6, and the other end of the central shaft 13 is connected with the servo stepping motor 8 through a coupler 9. The swing arm 6 is one of the important components of the sampler, the swing arm is in a shape of a Chinese character 'jia', a wide part of the upper part of the swing arm is provided with a long round hole and a threaded hole (not shown in the attached drawing) so as to be connected with the host 7 and the converter 4, and the relative positions between the host and the converter and the swing arm can be adjusted; the connection mode of the central shaft 13 and the lower end of the swing arm 6 can be flat keys, splines, interference fit, locking nuts or clamping plates and the like.
The central shaft 13 is cylindrical, the length direction of the central shaft is vertical to the central axis of the cutter 1, the spherical center of the cutter 1 is positioned on the extension line of the axis of the central shaft 13, and the vertical deviation and the left-right deviation are not more than 1 mm; the distance between the axis of the central shaft 13 and the fixing plate 10 is 15-50 mm.
A torque amplifier 11 is arranged between the coupler 9 and the central shaft 13 and plays a role in reducing speed and amplifying torque, and the torque amplification factor is 25-120.
In order to prevent the host 7 from being stuck in the cutting process, the current of the host 7 is detected through a control system, when the current rises, the motion of the servo stepping motor 8 is stopped, and when the current is normal, the servo stepping motor 8 is restarted to continue working; the servo stepping motor 8 is controlled during the cutting process so that the feed angle velocity vector is 0.1-2 degrees/second.
During installation, the specific process is as shown in fig. 2, and the components constituting the cutting movement unit and the feeding movement unit of the cutting tool are respectively prepared: a cutting tool is prepared, the cutting tool and a fixture block for fixing the cutting tool are positioned and then connected to a converter, and the converter is respectively connected with a host and a swing arm through the synergistic action of an adjusting block and a fixing block to complete the assembly of a cutting motion unit; a central shaft is provided, the servo stepping motor and the torque amplifier are connected through a coupler and positioned with the fixed plate, the requirement of coaxiality is kept, and the central shaft, the torque amplifier and the swing arm are respectively connected to complete the assembly of the feeding motion unit; and programming a control program of the motion control unit, and respectively controlling the current of the host and the angular displacement and angular velocity vector of the servo stepping motor.
Example 2
A similar sampler as in example 1 is used, and the structure is shown in fig. 3, with the specific differences that:
Claims (9)
1. A portable sampler for sampling micro-damage of in-service equipment is characterized by comprising a cutter (1), a host (7) for driving the cutter (1) to rotate, a swinging unit for driving the cutter (1) to swing, and a swinging arm (6) arranged between the swinging unit and the cutter (1) and used for converting the power of the swinging unit into the swinging power of the cutter (1); the swing unit comprises a fixed plate (10), a servo stepping motor (8) fixedly mounted on the fixed plate (10) and a shaft support (12), wherein a central shaft (13) is arranged on the shaft support (12), one end of the central shaft (13) is fixedly connected with the lower end of the swing arm (6), and the other end of the central shaft (13) is connected with the servo stepping motor (8) through a coupler (9); the host (7) is fixed on the swing arm (6) through the fixed block (3) and the adjusting block (5);
during sampling, the main machine (7) drives the cutter (1) to rotate around the central axis, the swing unit drives the cutter (1) to swing in the plane of the central axis through the swing arm (6), and metal sampling is achieved, specifically: the cutter (1) is driven by the host (7) to rotate at a high speed by taking the central shaft of the cutter as a rotating shaft, the cutter (1) can cut the surface of equipment to be sampled by rotating at the high speed, the swing unit drives the swing arm (6) to swing, and in the swinging process, the cutter (1) swings along with the swing arm (6), the cutter (1) and the equipment to be sampled have relative displacement, and the cutter (1) cuts the equipment to be sampled while the displacement is carried out, so that a sample can be obtained on the surface of the equipment to be sampled and is contained in the cutter (1).
2. The portable sampler for sampling the micro-loss of in-service equipment according to claim 1, characterized in that the outer wall of the cutter (1) is spherical, the lower part of the cutter (1) is horizontal and is open, the interior of the cutter (1) is hollow, the top of the cutter (1) is provided with a handle, and the handle is arranged along the central axis of the cutter (1).
3. The portable sampling machine for sampling the microdestructive sample of in-service equipment as recited in claim 2, wherein the cutter opening has a corresponding spherical center angle greater than 180 °.
4. The portable sampler for sampling the micro-loss of in-service equipment as claimed in claim 2, wherein the main machine (7) is arranged along the central axis of the cutter (1), the bottom of the main machine (7) is provided with the fixture block (2), the upper end of the cutter handle is fixed in the fixture block (2), and the main machine (7) is fixed on the swing arm (6) through the fixing block (3) and the adjusting block (5).
5. The portable sampler for sampling of the micro-losses of in-service equipment according to claim 4, characterized in that the position of the main machine (7) on the fixed block (3) and the adjusting block (5) is adjustable in a direction along the line of the central axis of the tool (1).
6. The portable sampler for sampling of the micro-loss of in-service equipment as claimed in claim 2, wherein the host (7) is fixedly mounted on the swing arm (6) perpendicular to the central axis of the cutter (1), the host (7) is connected with the converter (4), the converter (4) is arranged along the central axis of the cutter (1), the bottom of the converter (4) is provided with the fixture block (2), the upper end of the cutter handle is fixed in the fixture block (2), the converter (4) is fixed on the swing arm (6) through the fixing block (3) and the adjusting block (5), and the converter (4) is used for changing the rotation angle and the rotation direction of the host (7).
7. The portable sampler for sampling of the micro-losses of in-service equipment according to claim 6, characterized in that the position of the converter (4) on the fixed block (3) and the adjusting block (5) is adjustable in a direction along the line of the central axis of the tool (1).
8. The portable sampler for sampling the microdestructive sample of in-service equipment according to claim 1, wherein the central shaft (13) has a cylindrical shape, the length direction of the central shaft is perpendicular to the central axis of the cutter (1), the center of the sphere of the cutter (1) is located on the extension line of the axis of the central shaft (13), and the distance from the axis of the central shaft (13) to the fixing plate (10) is 15-50 mm.
9. A portable sampler for microdestructive sampling of in-service equipment as claimed in claim 1 wherein a torque multiplier (11) is provided between the coupling (9) and the central shaft (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960551.0A CN109085011B (en) | 2018-08-22 | 2018-08-22 | Portable sampler for sampling micro-damage of in-service equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810960551.0A CN109085011B (en) | 2018-08-22 | 2018-08-22 | Portable sampler for sampling micro-damage of in-service equipment |
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| Publication Number | Publication Date |
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| CN109085011A CN109085011A (en) | 2018-12-25 |
| CN109085011B true CN109085011B (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810960551.0A Active CN109085011B (en) | 2018-08-22 | 2018-08-22 | Portable sampler for sampling micro-damage of in-service equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114166651A (en) * | 2021-12-08 | 2022-03-11 | 北京科技大学 | In-service pressure-bearing equipment micro-sample high-temperature water stress corrosion test device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308063A (en) * | 2008-07-16 | 2008-11-19 | 华东理工大学 | On-service equipment micro- test sample electro-spark wire cutting sampling apparatus |
| CN202145172U (en) * | 2011-06-03 | 2012-02-15 | 西安热工研究院有限公司 | Portable small-invasive sampling device used on metal surface |
| CN105675334A (en) * | 2016-03-01 | 2016-06-15 | 天津大学 | Portable minimally invasive sampling machine and application thereof |
| CN107991122A (en) * | 2017-11-03 | 2018-05-04 | 苏州诺登德智能科技有限公司 | The micro- damage sampler of metal and its sampling method |
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2018
- 2018-08-22 CN CN201810960551.0A patent/CN109085011B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308063A (en) * | 2008-07-16 | 2008-11-19 | 华东理工大学 | On-service equipment micro- test sample electro-spark wire cutting sampling apparatus |
| CN202145172U (en) * | 2011-06-03 | 2012-02-15 | 西安热工研究院有限公司 | Portable small-invasive sampling device used on metal surface |
| CN105675334A (en) * | 2016-03-01 | 2016-06-15 | 天津大学 | Portable minimally invasive sampling machine and application thereof |
| CN107991122A (en) * | 2017-11-03 | 2018-05-04 | 苏州诺登德智能科技有限公司 | The micro- damage sampler of metal and its sampling method |
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| CN109085011A (en) | 2018-12-25 |
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