Heat sink for a rod anode x-ray tube

Abstract

The patent application provides a rod anode X-ray tube heat dissipation device, which comprises a gas nozzle, a gas nozzle channel, an outer sleeve and a main heat sink. The pressure airflow is formed by the gas nozzle, the gas nozzle channel, the air gap cavity between the outer sleeve and the rod anode, and the air passage of the heat sink. The working heat of the rod anode is continuously taken out, and the device has the technical advantages of more comprehensive heat dissipation, rapid heat dissipation and high efficiency, and can greatly improve the detection efficiency.

Description

TECHNICAL FIELD

[0001] The present patent application relates to X-ray non-destructive testing device, especially relates to a rod anode X-ray tube heat dissipation device for a large pipe diameter pipe plate of a workpiece to be detected. BACKGROUND

[0002] The rod anode X-ray flaw detector is mainly applied to the non-destructive testing of the quality of the welding seam in the hole of a pipe plate, and its popular application is more and more wide. Its working principle is that the anode rod containing an anode target is inserted into the empty pipe, under the action of the high-voltage electric field between the two poles, the cathode filament electron bombards the anode target, thereby generating the required X-ray, penetrating the detection pipe plate welding seam to take a picture. The rod anode part of the X-ray tube generates a large amount of heat in the detection, and the accumulated temperature of the rod anode reaches a certain limit value to generate a discharge, which greatly endangers the stability of the X-ray source and the service life of the X-ray tube. In order to ensure the continuous detection work, the equipment operation regulation stipulates that the pipe plate workpiece with a pipe diameter exceeding 18 mm needs to work in a 1:1 mode, that is, 1 minute of exposure needs 1 minute of natural cooling, and then the next pipe is implemented for the detection of the welding opening. For example, the non-destructive testing task of the evaporator heat exchange pipe has hundreds of detection holes, and if the current operation regulation is used, the detection work efficiency is too low, and the construction progress is delayed. SUMMARY

[0003] The purpose of the application of the present patent application is to synchronize heat dissipation even in the detection operation, avoid heat accumulation, ensure the stability in the detection of the X-ray tube, prolong the service life, shorten or even eliminate the natural cooling process after each detection, improve the detection operation efficiency, and provide a rod anode X-ray tube heat dissipation device.

[0004] The technical scheme of the rod anode X-ray tube heat dissipation device provided by the present patent application mainly comprises the following:

[0005] The air nozzle is a joint part in communication with the pressure gas source gas path, and is connected and arranged on the periphery of the rod anode root fixed flange base;

[0006] The air nozzle channel is arranged in the flange base, and is in communication with the air nozzle outside and extends to the rod anode root in the center inside;

[0007] The outer sleeve is a blind hole type sleeve which is coincident with the rod anode axis and is sleeved on the rod anode, and a gas gap cavity extending axially from the flange base to the position of the anode target is formed between the outer sleeve and the outer wall of the rod anode, and the rod anode root port of the gas gap cavity is in communication with the air nozzle channel;

[0008] The main heat dissipation body is a heat dissipation part fixedly connected with the outer sleeve, and an air duct in communication with the atmosphere is arranged in the main heat dissipation body, and the inner end of the air duct is in communication with the gas gap cavity.

[0009] One preferred option of the above overall technical solution, the gas channel is a radial extending transverse gas path channel in the main heat sink.

[0010] One preferred option of the above overall technical solution, the gas channel includes an axial distribution longitudinal gas path channel in the main heat sink, and the longitudinal gas path channel communicates with the transverse gas path channel.

[0011] One preferred option of the above overall technical solution, the outer sleeve is provided with an air outlet hole of the air gap cavity at the top end of the tube segment close to the rod anode.

[0012] One preferred option of the above overall technical solution, the outer sleeve is provided with an air outlet hole at the position where the tube segment exceeds the air gap cavity and covers the anode target.

[0013] One preferred option of the above overall technical solution, the device further includes a secondary heat sink, the front end of which is threadedly fixed to the opposite end of the main heat sink and is heat-conductively sleeved on the outer sleeve.

[0014] One preferred option of the above overall technical solution, the secondary heat sink is provided with a recessed air cavity at the front end, the recessed air cavity communicates with the gas channel, and another group of air outlet holes are formed on the tube segment of the outer sleeve corresponding to the recessed air cavity.

[0015] One preferred option of the above overall technical solution, the diameter of the main heat sink is slightly smaller than the inner tube diameter of the pipe plate workpiece to be detected.

[0016] The rod anode X-ray tube heat dissipation device technical solution disclosed in the patent application has the technical advantages of more comprehensive heat dissipation, rapid heat dissipation, and high efficiency, eliminates the adverse effects of the accumulation of working heat on the X-ray tube, especially when an air compressor is used as a pressure gas source, the X-ray tube can always work stably within a normal temperature range, and even the natural cooling process in the operation specification can be omitted, so that the detection operation can be continuously performed, and the detection efficiency is greatly improved. For example, in the execution of the non-destructive detection task of the evaporator heat exchange pipe, the detection progress improvement advantage is more obvious in the face of hundreds of detection holes. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an embodiment of the patent application.

[0018] Figure 2 It is a left view structure diagram. Figure 1

[0019] Figure 3 It is a partial enlarged view of Figure 1 ​​DETAILED DESCRIPTION

[0020] The present technical solution will be described clearly and completely through specific embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creativity shall be attributed to the scope of the present application.

[0021] The heat dissipation device of the rod anode X-ray tube is provided with an assembled Figure 1 heat dissipation assembly on the rod anode X-ray tube 13 shown by the dashed line, that is, Figure 1 the solid line structure in the figure, which consists of the air nozzle 1, the air nozzle channel 12, the outer sleeve 10 and the main heat sink 8.

[0022] The air nozzle 1 is a joint part communicated with the air path of the pressure source, which is arranged on the circumferential direction of the root flange base 2 for fixing the rod anode 4, and communicated with the air nozzle channel 12 in the flange base 2. The pressure source can be selected as a blower, preferably an air compressor.

[0023] The air nozzle channel 12 is arranged in the flange base 2, communicated with the air nozzle 1 outside and extended to the root of the central rod anode 4 inside.

[0024] The outer sleeve 10 is a blind hole type sleeve coinciding with the axis of the rod anode 4 and sleeved on the rod anode 4. As shown in the enlarged view of Figure 1 and Figure 3 , the rod anode 4 is arranged in the tube segment of the outer sleeve 10, and the top bolt head is fixedly connected with the inner end of the tube of the outer sleeve 10 by threads. After the connection, the annular air gap cavity 14 is formed between the inner wall of the outer sleeve 10 and the outer wall of the rod anode 4, which extends axially from the root flange base 2 to beyond the position of the anode target 16. The air outlet hole 6 of the air gap cavity 14 is arranged on the tube segment of the outer sleeve 10, close to the top end of the rod anode 4, especially at the position of the anode target 16 of the rod anode 4, preferably slightly beyond the position of the anode target 16. The air gap cavity 14 port of the flange base 2 of the outer sleeve 10 is communicated with the air nozzle channel 12.

[0025] The main heat sink 8 is a heat dissipation part fixedly connected with the outer sleeve 10, which has a conventional multiple heat dissipation surface and is made of a heat conductive material, such as aluminum, copper, etc. As shown in Figure 1 , the outer sleeve 10 is inserted into the main heat sink 8, and the top bolt head is fixedly connected with the main heat sink 8 by threads. The two parts form a good heat conductive contact, and the main heat sink 8 is provided with an air channel communicated with the atmosphere. The inner end of the air channel is communicated with the air outlet hole 6 of the outer sleeve 10.

[0026] The air channel is, for example, Figure 1 , Figure 2As shown, there are several radial transverse air passage 7 arranged in the main heat sink 8, the transverse air passage 7 inner end with the sleeve gas hole 6. Strong air flow by air nozzle 1 through the air nozzle channel 12 sweep through the annular air gap cavity 14, constantly carrying a large amount of heat energy by transverse air passage 7 out of the atmosphere, at the same time, the rod anode 4 of the working heat is also through the sleeve 10, by the main heat sink 8 heat conduction, to the outside, avoid X ray tube working heat accumulation, ensure the stability of X ray tube work, prolong its durability.

[0027] In order to make the detection of the heat dissipation effect in the work, the airway, further comprising a plurality of axial distribution of longitudinal air passage 9, the inner end of the longitudinal air passage 9 with the transverse air passage 7. When the rod anode equipped with the heat dissipation device is in the pipe of the detected workpiece, due to the tube wall, the air flow from the transverse air passage 7 will be weaker than in the tube outside state, and the opening of the longitudinal air passage 9 ensures the design flow of the heat dissipation air flow, and the strong air flow carrying heat is discharged quickly, realizing rapid heat dissipation and ensuring the stability of the X ray tube in the detection of the X ray tube in the reasonable temperature state.

[0028] In this embodiment, the main heat sink 8, the diameter is preferably slightly smaller than the inner diameter of the detected workpiece, so that the rod anode can be inserted into the pipe under the condition of meeting the required detection accuracy, even without increasing the clamping mechanism, the X ray tube can also be stable in the pipe without falling out, at the same time, meet the exposure positioning requirements, make up for the deficiency of the positioning effect of the compensation block 3 of the rod anode 4 in the detection.

[0029] In this embodiment, the device also includes a secondary heat sink 5, which is located between the main heat sink 8 and the compensation block 3 of the rod anode 4, and is heat conduction sleeved on the sleeve 10. The front end of the secondary heat sink 5 is fixedly connected with the opposite end of the main heat sink 8 by screw thread. The front end of the secondary heat sink 5 is provided with a recessed air cavity 15, which is communicated with the air passage of the main heat sink 8, and another group of gas holes 6' is arranged on the pipe section of the sleeve 10 corresponding to the recessed air cavity 15, which strengthens the directional flow of air flow and improves the heat dissipation effect of air flow.

Claims

1. A heat dissipation device for a rod anode X-ray tube, characterized in that, This device includes: The air nozzle (1) is a connector component that communicates with the pressurized air source air circuit and is connected to the circumferential direction of the fixed flange base (2) at the root of the rod anode; The air nozzle channel (12) is located in the flange base (2), and is connected to the air nozzle on the outside and extends to the root of the rod anode inward towards the center. The outer sleeve (10) is a blind hole type sleeve that coincides with the axis of the rod anode and is fitted on the rod anode. It forms an air gap cavity (14) between itself and the outer wall of the rod anode, which extends axially from the flange base to the position of the anode target (16). The rod anode root port of the air gap cavity (14) is connected to the air nozzle channel (12). The main heat sink (8) is a heat dissipation component that is fixedly connected to the outer sleeve. It has an air passage that communicates with the atmosphere inside, and the inner end of the air passage is connected to the air gap cavity (14).

2. The heat dissipation device for a rod anode X-ray tube according to claim 1, characterized in that, The air passage is a transverse air passage (7) that extends radially among several main heat sinks.

3. The heat dissipation device for a rod anode X-ray tube according to claim 2, characterized in that, The air passage includes longitudinal air passages (9) axially distributed among several main heat sinks, and the longitudinal air passages (9) are connected to the transverse air passages (7).

4. The heat dissipation device for a rod anode X-ray tube according to claim 1, characterized in that, The outer sleeve (10) has an air outlet (6) on the tube section near the top of the rod anode.

5. The heat dissipation device for a rod anode X-ray tube according to claim 1, characterized in that, The outer sleeve (10) has an air outlet (6) on its tube section that extends beyond the air gap cavity to cover the anode target (16).

6. The heat dissipation device for a rod anode X-ray tube according to claim 1, 2, 3, 4 or 5, characterized in that, The device also includes a secondary heat sink (5), whose front end is threadedly fixed to the opposite end of the main heat sink and is fitted onto the outer sleeve (10) with a heat-conducting sleeve.

7. The heat dissipation device for a rod anode X-ray tube according to claim 6, characterized in that, The auxiliary heat sink (5) has a recessed air cavity (15) at its front end, which is connected to the air passage, and the outer sleeve (10) tube section has another set of air outlet holes (6') corresponding to the recessed air cavity (15).

8. The heat dissipation device for a rod anode X-ray tube according to claim 1, 2, 3, 4 or 5, characterized in that, The diameter of the main heat sink (8) is smaller than the inner diameter of the tube sheet workpiece being inspected.

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