CN219348736U

CN219348736U - Vortex flow detection device for heat exchanger tube array

Info

Publication number: CN219348736U
Application number: CN202223290079.5U
Authority: CN
Inventors: 王猛飞; 李龙; 冯颖鹏
Original assignee: Xinjiang Zhengan Testing Technology Co ltd
Current assignee: Xinjiang Zhengan Testing Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-07-14
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses an eddy current detection device for a heat exchanger tube array, which comprises a detection rod, wherein at least 2 eddy current probes are circumferentially and equidistantly distributed around one end of the detection rod, one side of the eddy current probe, which is close to the detection rod, is connected with a detection link rod through a first rotating shaft, and one end of the detection link rod is connected with the end part of the detection rod through a second rotating shaft; wherein, be equipped with first torsional spring in the first pivot, be equipped with the second torsional spring in the second pivot. When the flaw detection is performed, the tube array in the heat exchanger does not need to be dismantled, and the utility model has the characteristics of time and labor saving and cost saving; in addition, the utility model has the characteristics of strong practicability, simple structure and convenient use.

Description

Vortex flow detection device for heat exchanger tube array

Technical Field

The utility model relates to an eddy current testing device, in particular to an eddy current testing device for a heat exchanger tube array.

Background

The shell and tube heat exchanger is a common heat exchanger type, and realizes heat exchange on two sides of a shell and tube under the heat transfer effect of the shell and tube by passing media with different temperatures on the inner side and the outer side of the shell and tube, so that the media on the high temperature side are cooled or the temperature of the media is recovered, and the shell and tube heat exchanger is generally used in liquid-liquid heat exchange or gas-liquid heat exchange.

When the shell and tube heat exchanger is used, the shell and tube is usually in high temperature, high pressure, high corrosion and high temperature difference environment for a long time, and when the shell and tube heat exchanger is used in such a severe environment for a long time, the damage of the shell and tube is very easy to cause, and when severe, the breakage of the shell and tube is caused, so that air leakage and liquid leakage are caused, the normal operation of production is seriously influenced, and the service life of equipment is greatly reduced.

In order to avoid the problems, enterprises usually perform flaw detection on the tube array of the heat exchanger at irregular intervals, and the tube array is replaced in time when damaged tube arrays are encountered. However, since the tubulation is in the sealed heat exchanger, the equipment is difficult to take out after being assembled, if the equipment is removed for each inspection, the inspection time can be greatly prolonged, more manpower and material resources are consumed, the risk of damaging devices is caused in the process of disassembly and assembly, and unnecessary loss is easily caused.

Therefore, if the inspection of the tube array can be completed without dismantling the heat exchanger tube array, the above-mentioned problems are further avoided.

Disclosure of Invention

The utility model aims to provide an eddy current testing device for a heat exchanger tube array. When the flaw detection is performed, the tube array in the heat exchanger does not need to be dismantled, and the utility model has the characteristics of time and labor saving and cost saving; in addition, the utility model has the characteristics of strong practicability, simple structure and convenient use.

The technical scheme of the utility model is as follows: the eddy current detection device for the heat exchanger tube array comprises a detection rod, wherein at least 2 eddy current probes are circumferentially and equidistantly distributed around one end of the detection rod, one side of the eddy current probe, which is close to the detection rod, is connected with a detection link rod through a first rotating shaft, and one end of the detection link rod is connected with the end part of the detection rod through a second rotating shaft; wherein, be equipped with first torsional spring in the first pivot, be equipped with the second torsional spring in the second pivot.

According to the vortex flow detection device for the heat exchanger tube array, the detection rod is connected with the limiting device in a sliding mode, and the limiting device can be fastened at the port of the heat exchanger tube array.

The vortex flow detection device for the heat exchanger tube array comprises a sliding sleeve which is in sliding connection with the detection rod, wherein external threads are arranged on the outer surface of the sliding sleeve, and the sliding sleeve is connected with a thread sleeve through the external threads; at least 2 supporting pads are circumferentially distributed around one end of the sliding sleeve at equal intervals, one side, close to the sliding sleeve, of each supporting pad is connected with a supporting rod through a third rotating shaft, and one end of each supporting rod is connected to the end portion of the sliding sleeve through a fourth rotating shaft.

According to the vortex flow detection device for the heat exchanger tube array, the number of the supporting pads is consistent with the number of the vortex flow probes, and the width of the supporting pads is consistent with the width of the vortex flow probes.

According to the vortex flow detection device for the heat exchanger tube nest, the limit sliding groove is formed in the detection rod along the length direction, and the limit nail matched with the limit sliding groove is arranged in the sliding sleeve.

The vortex detection device for the heat exchanger tube array is characterized in that the detection rod is of a segmented splicing structure, and the segments are connected through the connecting screw and the connecting screw hole which are arranged at the head end and the tail end.

The utility model has the beneficial effects that:

1. according to the utility model, the eddy current probes distributed in the annular shape are arranged at the end part of the detection rod, and the eddy current probes penetrate into the tubulation to finish flaw detection of the tubulation, so that the tubulation does not need to be dismantled during detection, thereby greatly shortening the detection time, saving manpower and material resources, and avoiding unnecessary damage of equipment caused by disassembly and assembly.

2. The eddy current probe is connected with the detection rod through the detection link rod, and the torsion spring is arranged at the connected rotating shaft, so that the eddy current probe can form elastic contact with the inner wall of the tube array at any time under the action of the torsion spring, and the flaw detection is successfully completed; the whole structure has the advantages of simple structure and convenient use on the basis of practicality; in addition, the elastic contact eddy current probe has the further advantage that when the caliber of the tube array changes, the detection equipment can still finish flaw detection without changing the equipment, and the practicability is higher.

3. According to the utility model, the limit device is arranged, so that the flaw detection process is smoother, and the operation is more convenient; the number and the width of the support pads are consistent with those of the eddy current probes, so that the rotating angle and the coverage area can be checked more conveniently when the eddy current probes are rotated to detect the flaw of different areas, and the eddy current probe has the advantage of convenience in use; and through setting up the measuring pole to segmentation mosaic structure, then can satisfy the inspection of detecting a flaw of the tubulation of different length, the practicality is stronger.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a connection structure of an eddy current probe and a detection rod;

FIG. 3 is a schematic diagram of a connection structure of a support pad and a sliding sleeve;

FIG. 4 is a left side view of FIG. 3;

fig. 5 is a schematic structural view of the test lever.

Reference numerals illustrate: the device comprises a 1-detection rod, a 2-vortex probe, a 3-first rotating shaft, a 4-detection link rod, a 5-second rotating shaft, a 6-first torsion spring, a 7-second torsion spring, an 8-limiting device, an 81-sliding sleeve, an 82-threaded sleeve, an 83-supporting pad, an 84-third rotating shaft, an 85-supporting rod, an 86-fourth rotating shaft, a 9-limiting sliding chute, a 10-limiting nail, an 11-connecting screw and a 12-connecting screw hole.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.

Embodiments of the utility model:

the eddy current detection device for the heat exchanger tube array comprises a detection rod 1, wherein at least 2 eddy current probes 2 are circumferentially and equidistantly distributed around one end of the detection rod 1 (only 2 eddy current probes are arranged in the embodiment), one side of each eddy current probe 2, close to the detection rod 1, is connected with a detection link rod 4 through a first rotating shaft 3, and one end of each detection link rod 4 is connected with the end of the detection rod 1 through a second rotating shaft 5; wherein, be equipped with first torsional spring 6 on the first pivot 3, be equipped with second torsional spring 7 on the second pivot 5.

In flaw detection, the eddy current probe 2 of the present embodiment needs to be connected to an external analyzer. The specific inspection process is as follows: opening the sealing head of the shell and tube heat exchanger, inserting one end of the vortex probe 2 of the detection rod 1 in the embodiment from the end part of the shell and tube, elastically contacting the outer wall of the vortex probe 2 with the inner wall of the shell and tube in the inserting process, rotating a certain angle after inserting into the bottom of the shell and tube, and then pulling back to finish the flaw detection of the shell and tube in the back and forth movement process.

In another embodiment, the detecting rod 1 is slidably connected with a limiting device 8, and the limiting device 8 can be fastened at a port of the heat exchanger tube array. When the limiting device 8 is fixed at the pipe orifice of the tube array, the detection rod 1 cannot rotate in the process of pulling back and forth, so that the eddy current probe 2 can linearly advance in the process of coming back and forth, and missing detection or repeated detection is avoided.

In another embodiment, the limiting device 8 includes a sliding sleeve 81 slidably connected with the detecting rod 1, an external thread is provided on an outer surface of the sliding sleeve 81, and the sliding sleeve 81 is connected with a thread sleeve 82 through the external thread; at least 2 support pads 83 (only 2 are shown in this embodiment) are circumferentially and equidistantly distributed around one end of the sliding sleeve 81, one side of the support pad 83, which is close to the sliding sleeve 81, is connected with a support rod 85 through a third rotating shaft 84, and one end of the support rod 85 is connected to the end of the sliding sleeve 81 through a fourth rotating shaft 86.

During flaw detection, the eddy current probe 2 is inserted into the tube array according to the previous operation, then the sliding sleeve 81 and the support pad 83 are plugged into the tube orifice of the tube array, the threaded sleeve 82 is rotated to move towards one side of the support rod 85 until the support rod 85 is propped up and the support pad 83 is firmly pressed at the tube orifice of the tube array, and then flaw detection is carried out.

In another embodiment, the number of the supporting pads 83 is consistent with the number of the eddy current probes 2, and the width of the supporting pads 83 is consistent with the width of the eddy current probes 2.

The purpose of the arrangement mode of this embodiment is that the eddy current probe 2 is located inside the tube array, and the rotation angle and the flaw detection coverage area of the eddy current probe are difficult to observe each time, and the rotation angle and the coverage area after rotation of the support pad 83 can be directly observed to judge the rotation angle and the coverage area of the eddy current probe 2, so that missing inspection and re-inspection are avoided.

In another embodiment, the detection rod 1 is provided with a limit chute 9 along the length direction, and the sliding sleeve 81 is provided with a limit nail 10 matched with the limit chute 9. In the process of moving the detection rod 1 back and forth, the situation that the detection rod 1 rotates can be avoided by means of the cooperation of the limiting sliding groove 9 and the limiting nails 10.

In another embodiment, the detection rod 1 is a segment splicing structure, and the segments are connected through a connecting screw 11 and a connecting screw hole 12 arranged at the head end and the tail end. When the lengths of the tubes are different, the number of the spliced detection rods 1 can be selected to adjust the length of the detection rods 1.

While the utility model has been described with reference to the preferred embodiments, it should be understood that the utility model is not limited to the embodiments described above, but is intended to cover modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. An eddy current testing device for heat exchanger tubulation, characterized in that: the device comprises a detection rod (1), wherein at least 2 eddy current probes (2) are circumferentially distributed around one end of the detection rod (1) at equal intervals, one side, close to the detection rod (1), of the eddy current probes (2) is connected with a detection link rod (4) through a first rotating shaft (3), and one end of the detection link rod (4) is connected with the end part of the detection rod (1) through a second rotating shaft (5); the first rotating shaft (3) is provided with a first torsion spring (6), and the second rotating shaft (5) is provided with a second torsion spring (7).

2. The vortex detection device for a heat exchanger tube array of claim 1, wherein: and the detection rod (1) is connected with a limiting device (8) in a sliding manner, and the limiting device (8) can be fastened at the port of the heat exchanger tube array.

3. The vortex detection apparatus for a heat exchanger tube array of claim 2, wherein: the limiting device (8) comprises a sliding sleeve (81) which is in sliding connection with the detection rod (1), an external thread is arranged on the outer surface of the sliding sleeve (81), and the sliding sleeve (81) is connected with a thread sleeve (82) through the external thread; at least 2 supporting pads (83) are circumferentially and equidistantly distributed around one end of the sliding sleeve (81), one side, close to the sliding sleeve (81), of each supporting pad (83) is connected with a supporting rod (85) through a third rotating shaft (84), and one end of each supporting rod (85) is connected to the end of the sliding sleeve (81) through a fourth rotating shaft (86).

4. A vortex detection apparatus for a heat exchanger tube array as set forth in claim 3 wherein: the number of the supporting pads (83) is consistent with the number of the eddy current probes (2), and the width of the supporting pads (83) is consistent with the width of the eddy current probes (2).

5. The vortex detection apparatus for a heat exchanger tube array as set forth in claim 3 or 4, wherein: the detection rod (1) is provided with a limiting chute (9) along the length direction, and a limiting nail (10) matched with the limiting chute (9) is arranged in the sliding sleeve (81).

6. The vortex detection device for a heat exchanger tube array of claim 1, wherein: the detection rod (1) is of a segmented splicing structure, and the segments are connected through a connecting screw (11) and a connecting screw hole (12) which are arranged at the head end and the tail end.