CN201075001Y - Device for detecting pipe wall thickness - Google Patents
Device for detecting pipe wall thickness Download PDFInfo
- Publication number
- CN201075001Y CN201075001Y CNU2007200960660U CN200720096066U CN201075001Y CN 201075001 Y CN201075001 Y CN 201075001Y CN U2007200960660 U CNU2007200960660 U CN U2007200960660U CN 200720096066 U CN200720096066 U CN 200720096066U CN 201075001 Y CN201075001 Y CN 201075001Y
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- probe
- sounding rod
- pipeline
- wall thickness
- spring
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model relates to a device for measuring the thickness of a pipeline wall. The detection device includes a signal collection device and an ultrasonic detection system and is characterized in that the signal collection device includes a measuring rod and a ladder-shaped ultrasonic probe; one end of the measuring rod is fixedly arranged with a probe positioning block which is cut with a probe hole; the large diameter end of the probe is arranged in the probe hole and affixed with the end surface of the measuring rod; a probe pressure block which is cut with a central ladder hole is arranged on the probe positioning block; the interior of the probe pressure block is provided with a spring; one end of the spring is arranged in the central ladder hole, while the other end is arranged on a ladder platform of the probe; the large diameter end of the probe is pressed and affixed on the contact end surface of the measuring rod; the small diameter end of the probe penetrates the spring and extends out of the probe pressure block; the other end of the measuring rod is arranged on a pipeline to be detected. The detection device has few parts and no special materials are needed; when in detection, the pipeline does not need to be cut with a hole; the structure is simple, the cost is low, and the popularization and application are easy.
Description
Technical field
The utility model relates to ultrasonic detection technology, is specially a kind of ultrasonic technology measuring channel wall thickness, the particularly pick-up unit of high-temperature and pressure pipeline wall thickness of utilizing, and international monopoly Main classification number plan is Int.Cl.G01B 7/00 (2006.01).
Background technology
Pipeline wall thickness relates to the security of its application, no matter is in production run or use therefore, and the detection of pipeline wall thickness is all significant.Comparatively speaking, the pipeline wall thickness in the use detects has prior meaning, and technical difficulty is bigger.
At present, the wall thickness on-line measuring device that high-temperature and pressure pipeline often adopts has two kinds, and a kind of is the resistance corrosion probe, and another kind is a supersonic thickness meter.First kind of device needs on pressure piping perforate so that the resistance corrosion probe to be installed, but needs the thickness measuring position mostly to be privileged sites such as elbow, threeway, and these position perforate meeting causes bigger negative effect to the intensity of member.Supersonic thickness meter is present ideal measuring thickness device, but the detection for high-temperature pipe then needs at the point position of pipeline wall thickness incubation chamber to be set, open incubation chamber during measurement, cumbersome, in order to realize the measurement of high-temperature pipe wall thickness, also need more expensive high-temperature probe of price and high-temperature coupling agent simultaneously.
Chinese patent CN2235603Y has proposed to utilize sounding rod and ultrasonic probe blast furnace lining to be carried out the device of wall thickness on-line monitoring.The metal measuring bar of this device inserts the high temperature furnace lining and together corrodes with furnace lining, utilize ultrasonic probe to measure the length variations of measuring staff, and then obtain the variation of lining thickness, yet this device can not directly apply on the wall thickness detecting of high-temperature and pressure pipeline, and main cause remains the perforate problem of pressure piping.
Multinomial United States Patent (USP) (US4783997, US7080556, US5951163) has proposed to utilize ultrasound wave buffer bar (Buffer Rod) to measure the device of high temp objects.These devices are mainly used to detect the high temperature fluid in pipeline or the equipment, buffer bar is mainly as the supersonic guide-wave bar, and propose coating and can effectively reduce hyperacoustic echo (trailing echoes) of spreading, improving signal to noise ratio (S/N ratio), the buffer bar that proposes to have tapering simultaneously has better guided wave performance.But the needs that the buffer bar in these devices has probe into internal tank and could monitor the high temperature fluid in the equipment, also relate to the perforate problem; What have then need increase special coupling device and could realize measuring between buffer bar and high temp objects, complex structure, and cost is higher.
The utility model content
At the deficiencies in the prior art, technical problem to be solved in the utility model is: the pick-up unit that a kind of pipeline wall thickness is provided.This pick-up unit is simple in structure, and is with low cost, detects when using and need not punch on pipeline, neither influences the intensity of pipeline, can utilize general ultrasonic probe and couplant to carry out pipeline wall thickness again and detect, and is specially adapted to the detection of high-temperature and pressure pipeline wall thickness.
The technical scheme that the utility model solves described pick-up unit technical matters is: the pick-up unit that designs a kind of pipeline wall thickness, it comprises signal pickup assembly and ultrasonic wave detecting system, it is characterized in that described signal pickup assembly comprises sounding rod and stepped appearance ultrasonic probe, end at sounding rod is fixed with the probe locating piece with screw, and the probe locating piece has probe hole; The larger diameter end of ultrasonic probe is installed in the described probe hole, and fits with the end face of sounding rod; The probe compact heap adopts engage thread to be installed on the probe locating piece, the probe compact heap has central stepped, spring is installed in it, one end of spring is installed in the described central stepped, the other end is installed on the ladder platform of ultrasonic probe, and the larger diameter end of probe compressed is fitted in and the contacting on the end face of sounding rod; The smaller diameter end of ultrasonic probe is passed spring, stretches out outside the probe compact heap; The other end of described sounding rod is used to be installed in detected pipeline.
Compared with prior art, the parts that the pick-up unit of the utility model pipeline wall thickness uses are few, sounding rod also need not special material, need not in the perforate of pipe detection position when detecting application, therefore simple in structure, with low cost, be easy to realize, can not influence the intensity of pipeline, need not that incubation chamber is set yet, need not high-temperature probe and high-temperature coupling agent, therefore be specially adapted to the detection of high-temperature and pressure pipeline wall thickness.Easy to utilize.
Description of drawings
Fig. 1 is the global shape structural representation of a kind of embodiment of pick-up unit of the utility model (High Temperature High Pressure) pipeline wall thickness;
Fig. 2 is the probe compact heap shape and structure synoptic diagram of a kind of embodiment of pick-up unit of the utility model (High Temperature High Pressure) pipeline wall thickness.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof the utility model is described further:
The pipeline wall thickness pick-up unit of the utility model design (is called for short pick-up unit, referring to Fig. 1,2), it comprises signal pickup assembly and ultrasonic wave detecting system, it is characterized in that described signal pickup assembly comprises sounding rod 5 and stepped appearance ultrasonic probe (being called for short probe) 10, end at sounding rod 5 is fixed with probe locating piece 7 with sunk screw 8, and probe locating piece 7 has probe hole 14; The larger diameter end of ultrasonic probe 10 is installed in the described probe hole 14, and fits with an end face (Figure 1 shows that the upper surface) of sounding rod 5; Probe compact heap 9 adopts engage thread to be installed on the probe locating piece 7, probe compact heap 9 has central stepped 15, spring 11 is installed in it, one end of spring 11 is installed on the ladder platform in the described central stepped 15, the other end is installed on the ladder platform of described probe 10, and 10 the larger diameter end of will popping one's head in compresses and is fitted in and the contacting on the end face of sounding rod 5; The smaller diameter end of described probe 10 (being lead end) is passed spring 11, stretches out outside probe compact heap 9; The other end of described sounding rod 5 is used to be installed in detected pipeline.Described sounding rod 5 embodiment adopt the right cylinder design.
Pick-up unit of the present utility model is further characterized in that outside the middle part of described sounding rod 5 and is with cooling package, comprise that a sleeve 4 reaches and supporting end cap 2 and the gland 1 in its two ends, between gland 1 and end cap 2, place O-ring seal 3, end cap 2 and sleeve 4 welding are tightened sealing and axial location that gland 1 can be realized cooling package; The water inlet pipe interface 6 and the rising pipe interface 6 ' of chilled water are set on the barrel of sleeve 4; The cooling package and the external cooling water pipeline circulation system (not drawing among the figure) are formed the cooling device of sounding rod 5.Described chilled water recycles, and the sounding rod 5 when utilizing recirculated cooling water to the measurement high-temperature and pressure pipeline cools off.The external cooling water pipeline circulation system is a prior art.This pick-up unit that has cooling device is specially adapted to the detection of high-temperature and pressure pipeline wall thickness.
Cooling device described in the utility model designs for removable structure, and can change the sleeve 4 of suitable length, so that cooling device obtains suitable heat transfer area according to the temperature height of tested pipeline 13, the temperature of recirculated cooling water etc.Certainly, described sounding rod 5 also should satisfy under the prerequisite of thickness measuring scope suitably lengthening.In addition, the installation site of described cooling device can be along the axially suitably adjustment of sounding rod 5, to adapt to the needs of pipe insulating layer 12 thickness.
Cooling device of the present utility model is owing to need to pack into from sounding rod 5 ends, so the applying of sounding rod 5 ends and probe 10, can not directly adopt union (screwed)bonnet (UB to compress probe (as described in the CN2235603Y document), so increase probe locating piece 7.Probe locating piece 7 is connected by sunk screw 8 positioning and fixing with sounding rod 5 ends earlier, and then utilizes probe compact heap 9 and spring 11 to compress probe 10.
When the utility model pick-up unit is used, it is identical with the material of tested pipeline 13 to design sounding rod 5 materials, and an end of this sounding rod 5 (the shaven head end of parts such as probe locating piece 7 is installed) directly is vertically welded on the tube wall check point of tested pipeline 13, detect to carry out duct thickness.The thickness of ultrasound examination pipeline is originally as prior art.
In order to improve the signal to noise ratio (S/N ratio) of sounding rod 5, the utility model can be at the surface of sounding rod 5 spraying clad material.Described clad material is meant that the modes with thermal spray spray one deck functional material on sounding rod 5 surface, and this clad material and sounding rod 5 materials should have close acoustic resistance, and the different velocities of sound can spray stainless steel coating as the surface of carbon steel sounding rod 5.
The utility model Design of device principle is to make the testee (particularly High Temperature High Pressure tube wall) that is difficult for directly contact produce protrusion, and makes protrusion become the part of testee; This outshot thickness (length) is known, and this outshot can be cooled and become the surface that is easy to contact again simultaneously.The material of the utility model pick-up unit design sounding rod 5 is identical with the tested pipeline material for this reason, and the tube wall that directly is welded on high-temperature and pressure pipeline 13 detects on the position, and sounding rod 5 is cooled off simultaneously, so the utility model pick-up unit just can utilize general ultrasonic probe and couplant to realize particularly measurement (comprising online detection) to the high-temperature and pressure pipeline wall thickness preferably.
Should also be noted that the utility model device and method is feasible equally when the normal temperature pipe detection.At this moment, cooling device need be set.In addition, though the utility model also be applicable to danger such as the not high pressure of temperature is very big and be difficult for the online detection occasion of pipeline of close contact.
When using the utility model pick-up unit to detect, relevant with the material that described sounding rod 5 is selected, because hyperacoustic velocity of propagation depends on the material that sounding rod 5 is selected.When detecting, the material of the sounding rod of the utility model being made by surveying instrument 5 is demarcated, make hyperacoustic speed after, on surveying instrument, can directly measure the total length (being gross thickness) of measured object.
The wall thickness H of (High Temperature High Pressure) pipeline 13 can be calculated by following formula (1):
H＝L-h
Wherein, L is the length of sounding rod 5 and total thickness (length) degree of tested pipeline 13 wall thickness; H is the length of sounding rod 5.
Clearly, total length L is removed after the length h of known sounding rod 5, resulting is exactly the wall thickness of needed tested pipeline 13.
The utility model is not addressed part and is applicable to prior art.
Provide specific embodiment of the utility model below, but the utility model is not subjected to the restriction of embodiment.
Embodiment 1
The bottom of sounding rod 5 is welded on the plane plectane (simulation pipeline), and it is that raw material is made that sounding rod 5 all adopts 20 steel with plectane, the diameter 19mm of sounding rod 5, length 150mm, surface spraying 1Cr18Ni9Ti stainless steel coating, coating thickness 0.5mm.Through demarcating, selected hyperacoustic speed is 5800 meter per seconds; Adopting precimeter to measure selected circle plate thickness is 15.7 millimeters, with the welding rod of identical material sounding rod 5 is welded on the plectane, and postwelding sounding rod upper surface to the distance of plectane upper surface is 151.4mm (weld seam that contains 1.4mm).Be fixed on 4～6 millimeters places of sounding rod 5 ends with sunk screw 8 locating piece 7 of will popping one's head in, probe 10 is placed in the central stepped 15 of probe locating piece 7, and fits with the upper end of sounding rod 5.Probe compact heap 9 adopts screw threads to be fixed on the probe locating piece 7, is fixed on spring 11 on the probe compact heap 9 and will pops one's head in and 10 compress on the upper surface that is fitted in sounding rod 5.
Adopting supersonic thickness meter to record total length L is 167.2mm, and the length h of sounding rod 5 is known as 151.4mm, according to formula (1), therefore can learn that circle plate thickness (pipeline wall thickness) H is 15.8 millimeters, with raw measurement data error 0.1mm only.
Based on embodiment 1, and at the middle part of sounding rod 5 installation cooling package; Its sleeve 5 is external diameter 57mm, and the weldless steel tube of wall thickness 3.5mm disposes end cap 2 and gland 1, and the water inlet pipe interface 6 and the rising pipe interface 6 ' of chilled water are set on the barrel of sleeve 5, and external cooling water recirculation system, cooling Design of length 50mm; After feeding chilled water, utilize electrical heating described plectane to be heated to 500 ℃, cooling water flow 25m
3/ h, the end face temperature that record sounding rod 5 this moment is 40 ℃; In order to demarcate the velocity of sound of system under this temperature environment, set up the velocity of sound, make the H value of being surveyed be 15.7mm (surplus) with implementing 1.Then to having the sounding rod of same size welding, hydrologic cycle cooling system and heating system are installed but plectane is thick with being equal to for the another set of pick-up unit of 19.5mm, implementation process and condition are the same, and recording circle plate thickness is 19.6mm, with raw measurement data also error 0.1mm only.
Claims (3)
1. the pick-up unit of a pipeline wall thickness, it comprises signal pickup assembly and ultrasonic wave detecting system, it is characterized in that described signal pickup assembly comprises sounding rod and stepped appearance ultrasonic probe, be fixed with the probe locating piece at an end of sounding rod with screw, the probe locating piece has probe hole; The larger diameter end of ultrasonic probe is installed in the described probe hole, and fits with the end face of sounding rod; The probe compact heap adopts engage thread to be installed on the probe locating piece, the probe compact heap has central stepped, spring is installed in it, one end of spring is installed in the described central stepped, the other end is installed on the ladder platform of ultrasonic probe, and the larger diameter end of probe compressed is fitted in and the contacting on the end face of sounding rod; The smaller diameter end of ultrasonic probe is passed spring, stretches out outside the probe compact heap; The other end of described sounding rod is used to be installed in detected pipeline.
2. the pick-up unit of pipeline wall thickness according to claim 1, it is characterized in that being with cooling package outside the middle part of described sounding rod, comprise that a sleeve reaches and supporting end cap and the gland in its two ends, between gland and end cap, place O-ring seal, sealing and axial location that gland can be realized cooling package are tightened in end cap and sleeve welding; The water inlet pipe interface and the rising pipe interface of chilled water are set on the barrel of sleeve; The cooling package and the external cooling water pipeline circulation system are formed the cooling device of sounding rod.
3. the pick-up unit of pipeline wall thickness according to claim 1 and 2 is characterized in that described sounding rod is a right cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200960660U CN201075001Y (en) | 2007-05-23 | 2007-05-23 | Device for detecting pipe wall thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200960660U CN201075001Y (en) | 2007-05-23 | 2007-05-23 | Device for detecting pipe wall thickness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201075001Y true CN201075001Y (en) | 2008-06-18 |
Family
ID=39520261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200960660U Expired - Lifetime CN201075001Y (en) | 2007-05-23 | 2007-05-23 | Device for detecting pipe wall thickness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201075001Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971603A (en) * | 2010-06-03 | 2013-03-13 | V&M法国公司 | Production control method and device for checking the traversability of pipes |
| CN103837108A (en) * | 2014-03-12 | 2014-06-04 | 成都信息工程学院 | Module zirconium strip thickness detection system |
-
2007
- 2007-05-23 CN CNU2007200960660U patent/CN201075001Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971603A (en) * | 2010-06-03 | 2013-03-13 | V&M法国公司 | Production control method and device for checking the traversability of pipes |
| CN102971603B (en) * | 2010-06-03 | 2016-02-24 | V&M法国公司 | Contribute to the method and apparatus of the production testing of the passability of pipe |
| CN103837108A (en) * | 2014-03-12 | 2014-06-04 | 成都信息工程学院 | Module zirconium strip thickness detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070523 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |