CN213515530U - Fixing device for wall thickness online monitoring probe of carbon steel high-temperature pressure vessel - Google Patents
Fixing device for wall thickness online monitoring probe of carbon steel high-temperature pressure vessel Download PDFInfo
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- CN213515530U CN213515530U CN202022012387.6U CN202022012387U CN213515530U CN 213515530 U CN213515530 U CN 213515530U CN 202022012387 U CN202022012387 U CN 202022012387U CN 213515530 U CN213515530 U CN 213515530U
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Abstract
The utility model discloses a fixing device for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe relates to supersound nondestructive test technical field for solve the problem that lacks the harmless connecting device who is used for ultrasonic probe and guided wave pole and high temperature pressure vessel among the prior art. In the fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe, a permanent magnet is assembled on a fixing plate, the fixing plate is connected with a supporting tube, a wave guide rod is arranged on the fixing plate in a penetrating way and is positioned in the supporting tube, and one end of the wave guide rod is tightly combined with the outer surface of a monitored vessel; one end of the supporting tube, which is far away from the fixed plate, is connected with a chuck, the chuck is used for placing an ultrasonic probe, and the other end of the guided wave rod penetrates through the chuck and is in close contact with the ultrasonic probe; one end of the chuck, which is far away from the supporting tube, is connected with a rotary pressure head, and the rotary pressure head is used for providing pressure towards the direction of the monitored container for the ultrasonic probe. The utility model discloses mainly be applied to in the on-line monitoring of carbon steel high temperature pressure vessel wall thickness.
Description
Technical Field
The utility model relates to an supersound nondestructive test technical field especially relates to a fixing device that is used for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe.
Background
The rising price of crude oil in the 80 s of the 20 th century has led to the worldwide energy crisis, so that people increasingly attach importance to the economy and the efficiency of modern industrial devices, and further, the process industries of petrochemistry, electric power and the like gradually develop towards high temperature and high pressure. For example, the maximum working temperature of a hydrogenation reactor in the coal liquefaction device reaches 450 ℃, and the maximum working pressure reaches 20 MPa. The use of a large number of high temperature pressure vessels places higher demands on non-destructive testing techniques. Pressure-bearing equipment in a high-temperature environment often bears severer environmental threats, and with the extreme trend of high parameters and high reliability faced by modern equipment, the accurate quantification of the early damage and the residual life of a structure becomes the leading edge and the hot spot in the field.
The high-temperature pressure vessel refers to a pressure vessel with a high-temperature wall in use, and the shape and the size of the high-temperature pressure vessel can be slowly changed due to creep deformation of materials. By high temperature, it is generally meant that the wall temperature exceeds the creep onset temperature of the vessel material (about 350 ℃ for typical steels). Boiler drums of thermal power plants, coal conversion reactors, reactor pressure vessels of some reactor type (high temperature gas cooled reactors and breeder reactors) nuclear power plants, and the like are all high temperature pressure vessels. Meanwhile, under the long-term action of high temperature, the tensile strength of the material is much lower when the lasting strength is shorter. Furthermore, the corrosive action (e.g. oxidation) of the material by the medium inside the container is exacerbated by the high temperatures.
In particular, high-temperature pressure vessels are generally applied in the fields of petrochemical industry, coal chemical industry, nuclear power and the like, and due to long-term high-temperature and high-pressure working environments, the vessels have failure risks such as wall thickness reduction, corrosion cracking, perforation leakage and the like. Wall thickness detection is a common index for controlling stable work of a high-temperature pressure container, and the wall thickness cannot be detected by using a conventional ultrasonic thickness gauge due to the fact that the temperature of the wall of the container is high. The inspection method is commonly used at present by using a high-temperature thickness gauge to be matched with a high-temperature couplant or using a high-temperature electromagnetic ultrasonic detector to detect the wall thickness. However, these detection methods can perform rapid detection only at a certain detection position for a short time, and cannot monitor the wall thickness of the container in real time, and cannot grasp the remaining wall thickness of the high-temperature container in real time. Meanwhile, the temperature of the wall thickness of the container is high, so that the labor intensity of wall thickness detection nearby the container is high, and the working condition is severe. In order to overcome the defects of the prior art, the method has important significance for carrying out real-time online monitoring on the high-temperature pipeline in a non-manual contact mode.
At present, the wall thickness monitoring of high-temperature pipelines and high-temperature containers by using an ultrasonic guided wave method is a newly developed technology in recent years, an ultrasonic transverse wave probe is used as an ultrasonic transmitting and receiving device, a guided wave rod is used as an ultrasonic propagation medium, the length of the guided wave rod is set according to the temperature range of an object to be detected, the lower end of the guided wave rod is in contact with the high-temperature container, and the upper end of the guided wave rod is in contact with the ultrasonic probe. The connected mode of guided wave pole and high temperature container has welding and direct contact two kinds, and the welded mode can lead to the fact extra damage to the vessel, and the welded joint position produces welding defect easily simultaneously and stress is concentrated, becomes the damage and takes place the position. Direct contact represents a new contact mode, for example, the waveguide rod and the detected material provided by Qinqie of Zhejiang theory of technology university in the thesis "high temperature pipeline wall thickness on-line monitoring and management system research and development" of the great graduation of science employ direct contact method for monitoring. However, in the thesis, a steel plate is used as a detection object, and a connection device of the waveguide rod and the steel plate needs to drill a hole in the steel plate of the detection object and screw a connection bolt. However, in practical application, it is not allowed to drill and install the waveguide rod on the monitored container, so the set of devices is only suitable for the research of monitoring principle in laboratory research.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fixing device for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe for solve and lack the technical problem that is used for ultrasonic transducer and guided wave pole and high temperature pressure vessel's harmless connecting device among the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a fixing device for a wall thickness online monitoring probe of a carbon steel high-temperature pressure vessel comprises: the fixed plate is provided with a permanent magnet and is connected with a supporting tube, a wave guide rod penetrates through the fixed plate and is positioned inside the supporting tube, and one end of the wave guide rod is tightly combined with the outer surface of the monitored container; one end of the supporting tube, which is far away from the fixing plate, is connected with a chuck, the chuck is used for placing an ultrasonic probe, and the other end of the guided wave rod penetrates through the chuck and is in close contact with the ultrasonic probe; one end of the chuck, which is far away from the supporting tube, is connected with a rotary pressure head, and the rotary pressure head is used for providing pressure towards the direction of the monitored container for the ultrasonic probe.
In practical application, the end face of the fixing plate, which is in contact with the supporting tube, is provided with a positioning hole, and the positioning hole adopts a blind hole and is used for placing the permanent magnet.
The end face of the fixing plate, which is in contact with the supporting tube, is provided with a fixing tube, and the fixing tube is positioned in the central area of the fixing plate and is connected with the supporting tube; the fixed plate is located the coverage area of fixed pipe is equipped with the constant head tank, the constant head tank is used for wearing to establish the guided wave pole.
Specifically, the positioning holes comprise a plurality of positioning holes, and the plurality of positioning holes are uniformly distributed around the circumference of the fixing pipe.
In practical application, the permanent magnet is made of aluminum, cobalt and nickel, and the working temperature range is 450-900 ℃.
One end of the supporting tube is connected with the fixed tube in a threaded connection mode, and the other end of the supporting tube is connected with the chuck in a welding connection mode.
Specifically, the guided wave pole with the one end of being monitored the container contact is equipped with the boss, just the width of boss is greater than the width of constant head tank.
Furthermore, a vertical groove is formed in the side wall of the chuck and used for placing a connector of the ultrasonic probe; the chuck closes on the terminal surface of fixed plate is equipped with the central groove, the central groove is used for wearing to establish the guided wave pole.
Further, the rotary pressure head is connected with the chuck in a threaded connection mode.
Further, the ultrasonic probe adopts a transverse wave straight probe; and a coupling agent is coated on the contact surface of the ultrasonic probe and the guided wave rod.
Compared with the prior art, a fixing device for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe has following advantage:
the utility model provides an in the fixing device that is used for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe, because the fixed plate is equipped with the permanent magnet, and is connected with the stay tube, the stay tube is connected with the chuck that is used for placing ultrasonic probe, and be used for providing the ultrasonic probe and move towards the rotatory pressure head of monitoring container direction pressure, and the fixed plate, stay tube and chuck wear to be equipped with the guided wave pole, the one end of guided wave pole closely combines with the surface of monitoring container, the other end closely contacts with ultrasonic probe, consequently the fixing between ultrasonic probe and guided wave pole has been realized with the help of rotatory pressure head and chuck, permanent magnet and fixed plate have realized the fixed of guided wave pole and whole device and monitored container simultaneously, thereby make the connected mode that adopts dry coupling between guided wave pole and the monitored container outer wall, need not use the high temperature couplant, and the whole device is connected stably, and can meet the long-term monitoring requirement.
Drawings
Fig. 1 is a schematic perspective view of a fixing device for a carbon steel high-temperature pressure vessel wall thickness online monitoring probe according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a fixing device for a carbon steel high-temperature pressure vessel wall thickness online monitoring probe according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a fixing plate in the fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe according to the embodiment of the present invention;
FIG. 4 is a schematic view of an assembly structure of a fixing plate in the fixing device for the wall thickness online monitoring probe of the carbon steel high-temperature pressure vessel according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wave guide rod in a fixing device for a carbon steel high-temperature pressure vessel wall thickness online monitoring probe provided by the embodiment of the invention.
Reference numerals:
1-fixing the plate; 11-a positioning hole; 12-a stationary tube; 13-positioning grooves; 2-a permanent magnet; 3-supporting a tube; 4-a waveguide rod; 41-boss; 5-clamping head; 51-vertical slots; 6-rotating a pressure head; 61-a disk body; 62-a cylinder; 7-ultrasonic probe.
Detailed Description
For the convenience of understanding, the fixing device for the wall thickness online monitoring probe of the carbon steel high-temperature pressure vessel provided by the embodiment of the invention is described in detail below with reference to the attached drawings.
The embodiment of the utility model provides a fixing device that is used for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe, as shown in fig. 1 and fig. 2, include: the device comprises a fixed plate 1, a permanent magnet 2 is assembled on the fixed plate 1, a supporting tube 3 is connected to the fixed plate 1, a guided wave rod 4 penetrates through the fixed plate 1, the guided wave rod 4 is located inside the supporting tube 3, and one end of the guided wave rod 4 is tightly combined with the outer surface of a monitored container; one end of the supporting tube 3, which is far away from the fixing plate 1, is connected with a chuck 5, the chuck 5 is used for placing an ultrasonic probe 7, and the other end of the guided wave rod 4 penetrates through the chuck 5 and is tightly contacted with the ultrasonic probe 7; the end of the collet 5 remote from the support tube 3 is connected to a rotary ram 6, the rotary ram 6 being adapted to provide pressure to an ultrasonic probe 7 in a direction towards the container to be monitored.
Compared with the prior art, the embodiment of the utility model provides a fixing device for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe has following advantage:
in the fixing device for the wall thickness online monitoring probe of the carbon steel high-temperature pressure vessel provided by the embodiment of the utility model, because the fixing plate 1 is equipped with the permanent magnet 2 and is connected with the supporting tube 3, the supporting tube 3 is connected with the chuck 5 for placing the ultrasonic probe 7 and the rotary pressure head 6 for providing the ultrasonic probe 7 with the pressure towards the direction of the monitored vessel, and the fixing plate 1, the supporting tube 3 and the chuck 5 are provided with the guided wave rod 4 in a penetrating way, one end of the guided wave rod 4 is tightly combined with the outer surface of the monitored vessel, and the other end is tightly contacted with the ultrasonic probe 7, therefore, the fixing of the ultrasonic probe 7 and the guided wave rod 4 is realized by the rotary pressure head 6 and the chuck 5, meanwhile, the fixing of the guided wave rod 4 and the whole device and the monitored vessel is realized by the permanent magnet 2 and the fixing plate 1, thereby, the high-temperature couplant is not needed, any damage to the monitored container is avoided, the whole device is stable in connection, and long-term monitoring requirements can be met.
It is supplementary the explanation that needs here, the embodiment of the utility model provides a fixing device for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe can set up the length of guided wave pole 4 in a flexible way according to the difference of monitoring the container temperature to be applicable to the high temperature container monitoring field below 450 ℃ well.
In practical application, as shown in fig. 1-2 and fig. 3-4, the fixing plate 1 may be made of stainless steel, and the body thereof is processed into a circular disc structure; the end face of the fixing plate 1 contacting with the support tube 3 can be provided with a round positioning hole 11, and the positioning hole 11 can be a blind hole for placing the permanent magnet 2, so that the whole set of device is connected and fixed with the monitored container through the permanent magnet 2.
As shown in fig. 1-2 and fig. 3-4, the end surface of the fixing plate 1 contacting the support tube 3 may be provided with a circular fixing tube 12 by welding, and the fixing tube 12 may be preferably located in the central region of the fixing plate 1 and connected to the support tube 3; the fixed plate 1 is located the constant head tank 13 that can be equipped with rectangular shape in the coverage area of fixed pipe 12 to can be used for wearing to establish guided wave pole 4 through this constant head tank 13.
Specifically, as shown in fig. 1-2 in combination with fig. 3-4, the positioning hole 11 may include a plurality of positioning holes, and the plurality of positioning holes 11 may preferably be uniformly distributed around the circumference of the fixing tube 12. Furthermore, the number of the positioning holes 11 can be 4-6, and can be flexibly set according to the size of the fixing plate 1; in addition, the residual thickness of the bottom surface of the blind hole can be 1-2 mm.
In practical application, the permanent magnet 2 can be made of aluminum, cobalt and nickel and processed into a cylindrical structure, and the working temperature range can be 450-900 ℃, so that the long-term working at the environmental temperature below 450 ℃ can be effectively met.
The support tube 3 may be made of stainless steel, and the support tube 3 supports the weight of the chuck 5, the rotary ram 6, and the ultrasonic probe 7. And, one end of the support tube 3 may be connected with the fixed tube 12 by means of screw connection; for example: the inner wall of the support tube 3 may have an internal thread and the outer wall to which the fixing tube 12 is connected has a matching external thread; alternatively, the outer wall of the support tube 3 may have an external thread and the inner wall to which the fixing tube 12 is connected has a matching internal thread. Furthermore, the other end of the support tube 3 can be connected to the clamping head 5 by means of a welded connection.
Specifically, as shown in fig. 5, the waveguide rod 4 may be made of stainless steel; in addition, guided wave pole 4 can be equipped with boss 41 with the one end of being monitored the container contact, and the width of this boss 41 is greater than the width of constant head tank 13 to fixed plate 1 can compress tightly on this boss 41, and then effectively realizes guided wave pole 4 and the close coupling of being monitored the container surface.
Further, as shown in fig. 1 and 2, the chuck 5 may be made of stainless steel, and the overall structure may be a hollow cylinder; the side wall of the chuck 5 of the hollow cylinder structure can be provided with a vertical groove 51, and the vertical groove 51 can be used for placing a joint of the ultrasonic probe 7; in addition, the end surface of the collet 5 adjacent to the fixing plate 2 may be provided with a center groove (not shown in the drawings) so that the center groove can be used to penetrate the waveguide rod 4 to bring the waveguide rod 4 into close contact with the surface of the ultrasonic probe 7.
Further, as shown in fig. 1-2, the material of the rotary ram 6 may be stainless steel, and it may include: the disc body 61 and the cylinder 62 integrally formed with the disc body 61 are arranged, so that the rotary pressure head 6 can be used for providing pressure towards the monitored container direction for the ultrasonic probe 7, and further, the surface wafer of the ultrasonic probe 7 is effectively ensured to be in close contact with the surface of the waveguide rod 4. Furthermore, the outer surface of the cylindrical body 62 may be provided with an external thread and the inner surface of the collet 5 may have an internal thread matching the external thread, so that the threaded connection between the rotary ram 6 and the collet 5 is well achieved.
Further, the ultrasonic probe 7 may be a transverse wave straight probe, which is placed inside the hollow cylinder of the chuck 5 and transmits and receives ultrasonic waves to and from the inside of the monitored high-temperature container through the waveguide rod 4; moreover, the contact surface of the ultrasonic probe 7 and the waveguide rod 4 can be coated with a coupling agent, so that the sound transmission effect is further effectively enhanced.
To sum up, the embodiment of the utility model provides a fixing device for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe utilizes the ultrasonic guided wave principle to realize the real-time measurement of container wall thickness, need not realize fixedly at pressure vessel surface welding guided wave pole, the magnetic force that provides through the permanent magnet between complete equipment and the container, has effectively solved the technological problem of high temperature pressure vessel wall thickness long-term monitoring. Moreover, the whole device is convenient to install, stable and reliable, the labor intensity of a high-temperature container monitoring field is greatly reduced, and the safety and reliability of the device are improved.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a fixing device that is used for carbon steel high temperature pressure vessel wall thickness on-line monitoring probe which characterized in that includes: the fixed plate is provided with a permanent magnet and is connected with a supporting tube, a wave guide rod penetrates through the fixed plate and is positioned inside the supporting tube, and one end of the wave guide rod is tightly combined with the outer surface of the monitored container;
one end of the supporting tube, which is far away from the fixing plate, is connected with a chuck, the chuck is used for placing an ultrasonic probe, and the other end of the guided wave rod penetrates through the chuck and is in close contact with the ultrasonic probe; one end of the chuck, which is far away from the supporting tube, is connected with a rotary pressure head, and the rotary pressure head is used for providing pressure towards the direction of the monitored container for the ultrasonic probe.
2. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 1, wherein the end face of the fixing plate contacting with the supporting tube is provided with a positioning hole, and the positioning hole adopts a blind hole for placing the permanent magnet.
3. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 2, wherein a fixing tube is arranged on the end surface of the fixing plate contacting with the support tube, and the fixing tube is located in the central area of the fixing plate and connected with the support tube;
the fixed plate is located the coverage area of fixed pipe is equipped with the constant head tank, the constant head tank is used for wearing to establish the guided wave pole.
4. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 3, wherein the positioning holes comprise a plurality of positioning holes, and the plurality of positioning holes are uniformly distributed around the circumference of the fixing tube.
5. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 3, wherein one end of the supporting tube is connected with the fixing tube by means of threaded connection, and the other end of the supporting tube is connected with the chuck by means of welded connection.
6. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 3, wherein a boss is arranged at one end of the guided wave rod, which is in contact with the monitored vessel, and the width of the boss is greater than that of the positioning groove.
7. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 1, wherein the side wall of the chuck is provided with a vertical groove for placing the joint of the ultrasonic probe;
the chuck closes on the terminal surface of fixed plate is equipped with the central groove, the central groove is used for wearing to establish the guided wave pole.
8. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as recited in claim 1, wherein the rotary pressure head is connected with the chuck in a threaded manner.
9. The fixing device for the carbon steel high-temperature pressure vessel wall thickness online monitoring probe as claimed in claim 1, wherein the ultrasonic probe is a transverse wave straight probe;
and a coupling agent is coated on the contact surface of the ultrasonic probe and the guided wave rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022012387.6U CN213515530U (en) | 2020-09-15 | 2020-09-15 | Fixing device for wall thickness online monitoring probe of carbon steel high-temperature pressure vessel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022012387.6U CN213515530U (en) | 2020-09-15 | 2020-09-15 | Fixing device for wall thickness online monitoring probe of carbon steel high-temperature pressure vessel |
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| CN213515530U true CN213515530U (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884044A (en) * | 2021-09-18 | 2022-01-04 | 华电电力科学研究院有限公司 | Intelligent detection method and detection device for wall thickness of pressure container |
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2020
- 2020-09-15 CN CN202022012387.6U patent/CN213515530U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884044A (en) * | 2021-09-18 | 2022-01-04 | 华电电力科学研究院有限公司 | Intelligent detection method and detection device for wall thickness of pressure container |
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