CN107068216B - X-ray flaw detector for welding line of high-temperature gas cooled reactor heat exchange tube - Google Patents
X-ray flaw detector for welding line of high-temperature gas cooled reactor heat exchange tube Download PDFInfo
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- CN107068216B CN107068216B CN201710404217.2A CN201710404217A CN107068216B CN 107068216 B CN107068216 B CN 107068216B CN 201710404217 A CN201710404217 A CN 201710404217A CN 107068216 B CN107068216 B CN 107068216B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/002—Detection of leaks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- X-Ray Techniques (AREA)
Abstract
The invention discloses a high-temperature gas cooled reactor heat exchange tube welding seam X-ray flaw detector, which comprises a high-voltage generator, an operation console, an X-ray machine head, a cooling system and a clamping alignment tool, wherein the X-ray machine head is arranged on the high-voltage generator; the cooling system comprises a cooling liquid circulating pump, a cooling liquid tank and a circulating pipe; under the action of the circulating pump, the flow speed of the cooling medium is high, and the heat in the X-ray machine head can be timely taken away, so that the X-ray machine head can continuously work; the high-voltage generator supplies power to the X-ray machine head through the high-voltage cable, so that the X-ray machine head can be made to be very small and only comprises a high-voltage cable seat, a cathode filament, a vacuum cover, an anode target, a protective cover and other parts, the X-ray machine head can be placed on a clamping alignment tool, the distance between the X-ray machine head and a heat exchange tube is adjusted through the clamping alignment tool, and the sliding block on the clamping alignment tool moves to different positions of the heat exchange tube or different heat exchange tubes with the X-ray machine head to irradiate X-rays.
Description
Technical Field
The invention relates to a high-temperature gas cooled reactor welding quality detection device, in particular to an X-ray flaw detector for welding seams of a high-temperature gas cooled reactor heat exchange tube.
Background
The high-temperature gas cooled reactor is a novel nuclear reactor with highest safety currently acknowledged by the international nuclear energy world, has high heat efficiency, simple system and wide application, is one of the most promising advanced reactor types for adapting to the safety and economic requirements of the future energy market, and is called fourth generation nuclear power technology. The specific requirements on the heat exchange tube of the high-temperature gas cooled reactor steam generator are extremely severe, so that the processing and the manufacturing are extremely difficult; the heat exchange unit of the high-temperature gas cooled reactor evaporator is about 10 meters long, the diameter is only half meter, and the inside of the high-temperature gas cooled reactor evaporator is formed by dozens of heat exchange pipes in uneven and regular distribution.
For a heat exchange tube with a length of about ten meters, a plurality of butt welded welding joints are often arranged on the heat exchange tube, and each welding joint needs to be subjected to welding line radiation detection after different working procedures, such as radiation detection of welding lines after welding and radiation detection of welding lines after heat treatment, each heat exchange unit comprises 35 heat exchange tubes, and each steam generator is provided with 19 or more heat exchange units, so that in order to prepare the heat exchange tube provided with one steam generator, the welding line irradiation detection work needs to be repeated for thousands to tens of thousands of times;
in addition, in one heat exchange unit, adjacent heat exchange pipes are compactly arranged, the operation space is narrow, each welding node also needs to carry out transillumination at least at two angles (the two angles form 90 degrees with each other), as the heat exchange pipes need to be vertically placed, a plurality of ray detection works need to be carried out at a higher altitude from the ground, some heat exchange pipes to be detected are surrounded by other heat exchange pipes, the gaps between the heat exchange pipes are small, and the common portable X-ray flaw detector cannot be used on site;
in addition, the welding seam is not provided with any place for fixing an X-ray machine and a film, and the structure of the heat exchange tube is not allowed to be influenced or damaged;
the working efficiency of the X-ray flaw detector is also required to be greatly improved to possibly meet the special use requirements, and meanwhile, due to the fact that the welding precision requirements on the heat exchange tube are strict, the conditions of focal length, geometric unclear and the like are required to meet the preset requirements, and the extremely high standard is achieved.
For the above reasons, the present inventors have conducted intensive studies on the existing X-ray flaw detector in order to design a high temperature gas cooled reactor heat exchange tube weld joint X-ray flaw detector capable of solving the above problems.
Disclosure of Invention
In order to overcome the problems, the inventor makes intensive researches and designs an X-ray flaw detector for a welding line of a high-temperature gas cooled reactor heat exchange tube, wherein the flaw detector comprises a high-voltage generator, an operation console, an X-ray machine head, a cooling system and a clamping alignment tool; the cooling system comprises a cooling liquid circulating pump, a cooling liquid tank and a circulating pipe; the circulating pipe penetrates through the X-ray machine head, and under the action of the circulating pump, the cooling medium flows fast, so that heat in the X-ray machine head can be taken away timely, and the X-ray machine head can work continuously; the high-voltage generator supplies power to the X-ray machine head through the high-voltage cable, so that the X-ray machine head can be manufactured very little and only comprises a high-voltage cable seat, a cathode filament, a vacuum cover, an anode target, a protective cover and other parts, the X-ray machine head can be placed on a clamping and aligning tool, the distance between the X-ray machine head and a heat exchange tube is adjusted through the clamping and aligning tool, and then the sliding block on the clamping and aligning tool moves to different positions of the heat exchange tube or different heat exchange tubes with the X-ray machine head to conduct X-ray irradiation, so that the invention is completed.
Specifically, the invention aims to provide a high-temperature gas cooled reactor heat exchange tube weld joint X-ray flaw detector, which comprises a high-voltage generator 1, an operation console 2, an X-ray machine head 3 and a cooling system;
wherein the cooling system includes a cooling liquid circulation pump 41, a cooling liquid tank 42, and a circulation pipe 43;
the circulation tube 43 passes through the X-ray handpiece 3,
the high voltage generator 1 supplies power to the X-ray handpiece 3 via a high voltage cable 11.
Wherein the cooling liquid circulation pump 41, the cooling liquid tank 42 and the circulation pipe 43 constitute a closed circulation system.
Wherein the cooling system 4 further comprises an air cooling fan 44,
the air cooling fan is disposed near the coolant tank 42, and cools the coolant tank 42 by the air cooling fan.
The X-ray machine head 3 comprises a high-voltage cable seat 31, a cathode filament 32, a vacuum cover 33, an anode target 34 and a protective cover 35;
wherein the cathode filament 32 is located within a vacuum envelope 33,
the high voltage generated by the high voltage generator 1 is transmitted through a high voltage cable and is divided into two paths, wherein the negative high voltage of one path is connected with the cathode, and the anode is grounded to form a high voltage electric field; the other path is applied to the cathode filament 32, so that electrons generated by the cathode filament 32 are accelerated to strike the anode target 34 under the action of a high-voltage electric field to generate bremsstrahlung and generate X-rays.
Wherein a circulation pipe 43 passes through the protective cover 35 and passes near the anode target 34, and heat in the X-ray machine head 3 is taken away by the circulation pipe 43 and cooling liquid in the circulation pipe;
preferably, the part of the circulation pipe 43 located inside the protection cover 35 is made of electrolytic copper.
Wherein, both ends of the high-voltage cable are provided with high-voltage plugs,
a high voltage plug on the high voltage cable is embedded into the high voltage cable seat 31 and is contacted with a cathode;
the high voltage cable seat 31 is coated with a high voltage resistant silicone grease layer.
Wherein the operation console 2 is electrically connected with the high voltage generator 1,
an adjusting/controlling key is arranged on the operation console 2;
preferably, the operation console 2 can adjust/control voltage, current and exposure time.
The operation console 2 is further provided with an exposure parameter storage module, and a plurality of groups of callable exposure parameters are stored in the exposure parameter storage module.
Wherein, the flaw detector also comprises a clamping alignment tool 5,
the clamping and aligning tool 5 comprises a slide rail 51,
a clamping part 52 and a clamping block 53 are provided at one end of the slide rail 51,
a sliding block 54 which can slide along the sliding rail is also arranged on the sliding rail 51;
the clamping part 52 clamps the heat exchange tube 6 together with the clamping block 53;
a head fixing ring 55 for accommodating the X-ray head 3 is provided on the slider 54.
Wherein the clamping part 52 is an L-shaped solid piece, a circular arc gap for accommodating the heat exchange tube is arranged on the bending part of the clamping part,
the clamping block 53 can rotate relative to the sliding rail, so that the heat exchange tube clamp can be fastened and fixed at the arc notch;
preferably, a film fixing clamping rod 56 is arranged vertically on the clamping part 52, and the film fixing clamping rod 56 clamps the film and the back screen together with the heat exchange tube.
The invention has the beneficial effects that:
(1) The X-ray machine head of the high-temperature gas cooled reactor heat exchange tube welding seam X-ray flaw detector provided by the invention has small volume, is convenient to move, and can conveniently perform X-ray detection on different positions of the heat exchange tube and on different heat exchange tubes;
(2) The high-temperature gas cooled reactor heat exchange tube welding seam X-ray flaw detector provided by the invention is provided with a cooling system, and the system is a water cooling system, so that heat in an X-ray machine head can be timely taken away, and the X-ray machine head can continuously work without intermittent rest of 1:1;
(3) The X-ray flaw detector for the welding seam of the high-temperature gas cooled reactor heat exchange tube provided by the invention is provided with the matched clamping alignment tool, can be flexibly and conveniently arranged on the heat exchange tube, is convenient to focus, is convenient to adjust the distance between the heat exchange tube and the X-ray machine head, and is convenient to use and high in efficiency.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a high temperature gas cooled reactor heat exchange tube weld X-ray flaw detector according to a preferred embodiment of the present invention;
FIG. 2 shows a schematic diagram of an X-ray machine head structure of a high temperature gas cooled reactor heat exchange tube weld X-ray flaw detector according to a preferred embodiment of the invention;
fig. 3 shows a schematic diagram of a clamping alignment tool structure of a high-temperature gas cooled reactor heat exchange tube weld X-ray detector according to a preferred embodiment of the invention.
Reference numerals illustrate:
1-high voltage generator
11-high voltage cable
2-operation console
3-X-ray machine head
31-high voltage cable seat
32-cathode filament
33-vacuum hood
34-anode target
35-protective cover
41-cooling liquid circulating pump
42-Cooling liquid tank
43-circulation pipe
5-clamping alignment tool
51-slide rail
52-clamping part
53-clamping block
54-slider
55-machine head fixing ring
56-film fixing clamping rod
57-bolt
58-screwing wrench
59-jackscrew
6-heat exchange tube
Detailed Description
The invention is further described in detail below by means of the figures and examples. The features and advantages of the present invention will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to the X-ray flaw detector for the welding line of the high-temperature gas cooled reactor heat exchange tube provided by the invention, as shown in figure 1, the flaw detector comprises a high-voltage generator 1, an operation console 2, an X-ray machine head 3 and a cooling system; wherein the cooling system includes a cooling liquid circulation pump 41, a cooling liquid tank 42, and a circulation pipe 43;
the circulation tube 43 passes through the X-ray handpiece 3,
the cooling liquid circulation pump 41, the cooling liquid tank 42 and the circulation pipe 43 constitute a closed circulation system, the cooling liquid inside of which flows rapidly and can undergo phase change, thereby being capable of absorbing a large amount of heat and carrying out the absorbed heat from the X-ray head, and in this process, the total amount of the cooling liquid is not lost, and preferably, the cooling liquid is distilled water.
The heat in the X-ray machine head 3 can be timely taken away through the cooling system, so that the X-ray machine head 3 can continuously work;
the high voltage generator 1 supplies power to the 11X-ray handpiece 3 via a high voltage cable which gives 11 a lighter weight and minimizes the weight acting on the handpiece 3.
In a preferred embodiment, as shown in fig. 1, the cooling system 4 further comprises an air cooling fan 44,
the air cooling fan is arranged near the cooling liquid tank 42, and the cooling liquid tank 42 is cooled by the air cooling fan, so that heat brought out from the X-ray machine head can be quickly dispersed in the air, and the temperature of the whole cooling system is ensured to be within a safe temperature range.
In a preferred embodiment, the operating console 2 is electrically connected to a high voltage generator 1, in the upper part of which all control circuits are integrated in the integrated power supply, which control circuits perform/control the exposure operation in accordance with control instructions (exposure parameters) issued by the operating console 2.
An adjusting/controlling key is arranged on the operation console 2;
preferably, the operation console 2 can adjust/control the voltage, current and exposure time, and a corresponding alarm identification lamp is preferably arranged on the operation console 2 at the same time.
The operation console 2 is connected with an integrated power supply, preferably, the integrated power supply is 380V power supply, the input power supply is subjected to post-treatment by inversion, chopping, rectification and other modes and then is respectively transmitted to the cooling liquid circulating pump 41, the air cooling fan 44 and the high-voltage generator 1, and the operation states of the cooling liquid circulating pump 41, the air cooling fan 44 and the high-voltage generator 1 are controlled by the operation console 2.
In a preferred embodiment, as shown in fig. 1, the operation console 2 is further provided with an exposure parameter storage module, in which a plurality of sets of callable exposure parameters are stored.
Preferably, the exposure parameter storage module is a detachable storage chip, a corresponding chip can be selected according to the requirement, the exposure parameters are fetched from the chip, and the working state of the line flaw detector is controlled according to the exposure parameters.
Preferably, the exposure parameter storage module may also be a storage space in the computer system, so that not only the exposure parameters can be retrieved from the storage space, but also the exposure parameters applied by the flaw detector can be stored for convenient subsequent retrieval.
In a preferred embodiment, the high voltage generator comprises a high voltage transformer, a voltage regulating system, a current regulating system, a chopper inversion system, an overvoltage protection circuit system, an overcurrent protection circuit system and a cooling system. The transformer oil is injected around the high-voltage transformer for high-voltage insulation, other protection circuits are arranged in the modulation power supply, and signal feedback points are led to the outer side of the box body and are connected through a quick connector, so that reliable signal transmission is ensured;
preferably, the cooling liquid circulating pump and the cooling liquid tank are arranged on the outer wall of the tank body on the outer surface of the high-pressure generator, and the air cooling fan is also arranged on the outer wall of the tank body of the high-pressure generator, so that the high-pressure generator and the cooling liquid circulating pump can move together, the whole structure of the equipment is simpler, and the use is more convenient.
Preferably, the high voltage referred to in this application is a voltage around 130kV, preferably a practical high voltage of 110kV-120kV in order to ensure long-term safe operation of the system.
In a preferred embodiment, the X-ray handpiece 3 includes a high voltage cable seat 31, a cathode filament 32, a vacuum enclosure 33, an anode target 34, a protective cover 35, and a cathode; the cathode filament 32 is positioned in the vacuum cover 33 and fixed on the cathode, and the high voltage generated by the high voltage generator 1 is transmitted through a high voltage cable and divided into two paths, wherein the negative high voltage of one path is connected with the cathode, and the anode is grounded to form a high voltage electric field; the other path is applied to the cathode filament 32, so that electrons generated by the cathode filament 32 are accelerated to strike the anode target 34 under the action of a high-voltage electric field to generate bremsstrahlung and generate X-rays. .
In a preferred embodiment, as shown in fig. 2, a circulation pipe 43 passes through the protective cover 35 and passes near the anode target 34, and heat in the X-ray head 3 is taken away by the circulation pipe 43 and a cooling liquid inside thereof;
preferably, the circulation tube 43 is made of at least two materials, and the circulation tube 43 located in the protective cover 35 is made of electrolytic copper, thereby ensuring that the circulation tube 43 can be continuously operated at high temperature, ensuring stable heat exchange operation.
In a preferred embodiment, the focal point of the X-ray machine head 3 is 1×1mm, and due to the adoption of closed circulation cooling, the operation can be continuously performed in the detection process, meanwhile, due to the small focal point, the heat exchange tube can be subjected to radiation detection by using a closer focal distance, meanwhile, the geometric unclear requirement of the heat exchange tube can be met, and the detection efficiency is greatly improved.
In a preferred embodiment, the X-ray handpiece has a cylindrical shape, an outer protective cover having a diameter of about 80mm and an inner vacuum cover having a diameter of about 60 mm.
In a preferred embodiment, as shown in fig. 2, both ends of the high voltage cable are provided with high voltage plugs, thereby facilitating quick plugging; a high voltage plug on the high voltage cable is embedded into the high voltage cable seat 31 and is contacted with a cathode;
preferably, a high voltage silicone grease resistant layer is coated on the high voltage cable holder 31.
In a preferred embodiment, as shown in fig. 3, the flaw detector further comprises a clamping alignment fixture 5,
the clamping and aligning tool 5 comprises a slide rail 51,
a clamping part 52 and a clamping block 53 are provided at one end of the slide rail 51,
a sliding block 54 which can slide along the sliding rail is also arranged on the sliding rail 51;
the clamping part 52 clamps the heat exchange tube 6 together with the clamping block 53;
a head fixing ring 55 for accommodating the X-ray head 3 is provided on the slider 54.
In a preferred embodiment, as shown in fig. 3, the clamping portion 52 is an L-shaped solid member, and a curved portion thereof is provided with a circular arc notch for accommodating the heat exchange tube,
the clamping block 53 can rotate relative to the sliding rail, so that the heat exchange tube clamp can be fastened and fixed at the arc notch; preferably, the inner diameter of the circular arc notch is 0.3-1.5mm larger than the outer diameter of the heat exchange tube, and most preferably is 0.5-1.0mm larger than the outer diameter of the heat exchange tube, the circular arc notch can enable the clamping part 2 to be fully contacted with the heat exchange tube, and meanwhile the clamping part 2 is conveniently placed on a station to be detected when detection is convenient, so that a good stabilizing effect is achieved.
Preferably, a film fixing clamping rod 56 is arranged vertically on the clamping part 52, and the film fixing clamping rod 56 clamps the film and the back screen together with the heat exchange tube.
Preferably, the film fixing clamping rod 56 is connected with the clamping part 52 through a bolt, and 2 film fixing clamping rods 56 parallel to the axis of the heat exchange tube are arranged on one side of the clamping part 52 far away from the sliding rail, and the 2 film fixing clamping rods are at a certain distance and can provide proper supporting force; the 2 film fixing clamping rods form a plane, the film and the back screen are placed between the plane and the heat exchange tube, and are clamped and fixed by means of interference fit, and radiation detection operation is normally implemented.
In a preferred embodiment, the clamping block 53 is fixed to the slide rail by a pin, and a bolt 57 penetrating the pin and pressing against the clamping block 53 is further provided on the pin, and the bolt can be rotated by tightening a wrench 58 to press or release the clamping block 53, so that the clamping portion 52 clamps the heat exchange tube 6 together with the clamping block 53 or releases the heat exchange tube 6.
In a preferred embodiment, the dimensions of the clamping portion 52 may be set according to the diameters and lengths of the heat exchange tubes to be detected, so as to adapt to different working conditions, and the dimensions of the circular arc notch on the clamping portion 52 may be changed to enable the clamping portion 52 to adapt to heat exchange tubes of various types.
In a preferred embodiment, the sliding rail 51 is in a cuboid middle hollow design, so that the weight of the sliding rail is reduced, and the deformation of the heat exchange tube caused by overlarge total amount is avoided; because the sliding rail 51 is arranged, the supporting is not required to be erected on the ground or other objects, the occupied space is small, and meanwhile, the influence of other heat exchange pipes in the space can be avoided because the sliding rail is narrow;
in a preferred embodiment, the sliding rail 51 is engraved with a scale corresponding to the focal length of the X-ray flaw detector head, when the sliding block 54 moves on the sliding rail 51, the distance and the position of the sliding block 54 moving on the sliding rail 51 can be accurately determined by reading the scale on the sliding rail 51, so that the focal length of the X-ray flaw detector head can be adjusted, and the requirements of rapid detection and geometric unclear definition can be met. Preferably, the geometrical uncertainty is controlled below 0.51 by adjusting the focal length and the relative position. The geometrical ambiguity described in this application is a common term in the field of non-destructive inspection, in particular X-ray non-destructive inspection, the concept of which is defined as the ambiguity caused by penumbra, which depends on the focal spot size, focal length and workpiece thickness. The penumbra (soft Shadow) is the portion of the Shadow formed by the direct irradiation of the light source (source) and the lighter edge color.
In a preferred embodiment, the head fixing ring 55 is located at one side of the sliding rail and is in a ring shape, the X-ray head 3 is vertically inserted into the ring-shaped head fixing ring 55, a jackscrew 59 capable of protruding inwards is arranged on the wall of the head fixing ring 55, the jackscrew 59 is screwed, so that the jackscrew clamps the X-ray head 3, the X-ray head 3 is fixed on the head fixing ring 55, and after the jackscrew 59 is loosened, the X-ray head 3 can be adjusted up and down, so that the irradiation area of the X-ray is adjusted, and photographing requirements under different conditions are met.
Preferably, the handpiece fixing ring 55 is connected with the sliding block through a pin shaft or a screw, so that the handpiece fixing ring 55 can be properly rotated, the angle of the X-ray in the pitching direction can be adjusted through rotation, and the handpiece fixing ring can be locked and fixed after the angle meets the requirement.
The invention has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the invention can be subjected to various substitutions and improvements, and all fall within the protection scope of the invention.
Claims (8)
1. The X-ray flaw detector for the welding seam of the high-temperature gas cooled reactor heat exchange tube is characterized by comprising a high-pressure generator (1), an operation console (2), an X-ray machine head (3) and a cooling system;
wherein the cooling system comprises a cooling liquid circulating pump (41), a cooling liquid tank (42) and a circulating pipe (43);
the circulating pipe (43) passes through the X-ray machine head (3),
the high-voltage generator (1) supplies power to the cathode of the X-ray machine head (3) through a high-voltage cable (11);
the flaw detector also comprises a clamping alignment tool (5),
the clamping alignment tool (5) comprises a sliding rail (51),
a clamping part (52) and a clamping block (53) are arranged at one end of the sliding rail (51),
the clamping block (53) is fixed on the sliding rail through a pin shaft, a bolt (57) penetrating through the pin shaft and propping against the clamping block (53) is further arranged on the pin shaft, and the bolt can rotate under the action of a screwing wrench (58) so as to press or loosen the clamping block (53), so that the clamping part (52) and the clamping block (53) clamp the heat exchange tube (6) together or loosen the heat exchange tube (6);
a sliding block (54) which can slide along the sliding rail is also arranged on the sliding rail (51);
a head fixing ring (55) for placing the X-ray head (3) is arranged on the sliding block (54); the machine head fixing ring (55) is positioned on one side of the sliding rail and is in a circular ring shape, the X-ray machine head (3) is vertically inserted into the circular ring-shaped machine head fixing ring (55), a jackscrew (59) capable of protruding inwards is arranged on the wall of the machine head fixing ring (55), the jackscrew (59) is screwed, so that the jackscrew clamps the X-ray machine head (3), the X-ray machine head (3) is fixed on the machine head fixing ring (55), and the X-ray machine head (3) can be adjusted up and down after the jackscrew (59) is loosened, so that the irradiation area of X-rays is adjusted;
the clamping part (52) is an L-shaped solid piece, the bending part of the clamping part is provided with an arc gap for accommodating the heat exchange tube,
the clamping block (53) can rotate relative to the sliding rail, so that the heat exchange tube clamp can be fastened and fixed at the arc notch;
a film fixing clamping rod (56) is arranged on the clamping part (52) vertically, and the film fixing clamping rod (56) clamps the film and the back screen together with the heat exchange tube;
the sliding rail (51) is provided with scales corresponding to the focal length of the X-ray flaw detector head in a full-scale mode, when the sliding block (54) moves on the sliding rail (51), the moving distance and the moving position of the sliding block (54) on the sliding rail (51) can be accurately determined through the reading of the scales on the sliding rail (51), and then the focal length of the X-ray flaw detector head is adjusted, so that the requirements of rapid detection and geometric unclear are met.
2. The flaw detector according to claim 1, wherein,
the cooling liquid circulating pump (41), the cooling liquid tank (42) and the circulating pipe (43) form a closed circulating system.
3. The flaw detector according to claim 2, wherein,
the cooling system (4) further comprises an air cooling fan (44),
the air cooling fan is arranged near the cooling liquid tank (42), and the cooling liquid tank (42) is cooled by the air cooling fan.
4. The flaw detector according to claim 1, wherein,
the X-ray machine head (3) comprises a high-voltage cable seat (31), a cathode filament (32), a vacuum cover (33), an anode target (34) and a protective cover (35);
wherein the cathode filament (32) is positioned in the vacuum cover (33),
the high voltage generated by the high voltage generator (1) is transmitted through a high voltage cable and is divided into two paths, wherein the negative high voltage of one path is connected with the cathode, and the anode is grounded to form a high voltage electric field; the other path is applied to the cathode filament (32), so that electrons generated by the cathode filament (32) are accelerated to strike the anode target (34) under the action of a high-voltage electric field to generate bremsstrahlung and generate X rays.
5. The flaw detector according to claim 4, wherein,
a circulating pipe (43) passes through the protective cover (35) and passes near the anode target (34), and heat in the X-ray machine head (3) is taken away by the circulating pipe (43) and cooling liquid in the circulating pipe;
a part of the circulation pipe (43) located in the protective cover (35) is made of electrolytic copper.
6. The flaw detector according to claim 4, wherein,
both ends of the high-voltage cable are provided with high-voltage plugs,
a high-voltage plug on the high-voltage cable is embedded into the high-voltage cable seat (31) and is contacted with the cathode;
the high-voltage cable seat (31) is coated with a high-voltage resistant silicone grease layer.
7. The flaw detector according to claim 1, wherein,
the operation console (2) is electrically connected with the high-voltage generator (1),
an adjusting/controlling key is arranged on the operation console (2);
the operating console (2) can adjust/control voltage, current and exposure time.
8. The flaw detector according to claim 7, wherein,
the operation console (2) is also provided with an exposure parameter storage module, and a plurality of groups of callable exposure parameters are stored in the exposure parameter storage module.
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| CN201710404217.2A CN107068216B (en) | 2017-06-01 | 2017-06-01 | X-ray flaw detector for welding line of high-temperature gas cooled reactor heat exchange tube |
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| CN201710404217.2A CN107068216B (en) | 2017-06-01 | 2017-06-01 | X-ray flaw detector for welding line of high-temperature gas cooled reactor heat exchange tube |
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