Inspection device for inner wall of heat exchange tube

Abstract

The utility model discloses a heat exchange tube inner wall inspection device which is installed on the inner wall of a heat exchange tube and comprises a machine body, a driving mechanism, a tensioning mechanism, a supporting disc and a detection disc. A controller and a power supply are installed in the machine body, and a camera is arranged in front of the machine body to detect the front view of the machine body. The driving mechanisms are evenly distributed in the circumferential direction of the machine body, each driving mechanism comprises a driving wheel and a caterpillar band connected to the outer side of the driving wheel in a sleeving mode, and power is provided for advancing of the inspection device. The tensioning mechanism is connected with the machine body and the driving mechanism and can adjust the distance between the driving mechanism and the machine body; the supporting disc is fixed to the tail of the machine body, a first sliding groove is formed in the supporting disc, a first spring and a first sliding block are arranged in the first sliding groove, and a rolling body is arranged on the side, away from the first spring, of the first sliding block. And the detection disc is fixedly mounted on the machine body, is in data connection with the controller, and can detect flaws on the inner wall of the heat exchange tube, so that the flaw detection operation on the inner wall of the heat exchange tube is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange tube detection, and in particular relates to a heat exchange tube inner wall inspection device. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] The internal heat exchange tubes of the heat exchanger have a complex structure. During the use of the heat exchanger, the heat exchange tubes are subject to sudden temperature increases or decreases, which can easily cause damage and leakage. Therefore, it is necessary to conduct regular inspections of the heat exchange tubes. The existing inspection methods for heat exchange pipes are mostly manual control of the inspection machine to perform various data inspections such as flaw detection on the heat exchange tubes from the outside of the tube body of the heat exchange tube. The outside of the heat exchange tube is often provided with clamps and other fixings for the heat exchange tube. These fixings hinder the inspection of the heat exchange tube by the inspection machine, making it difficult for the existing inspection and flaw detection machines to inspect the fixings or connections of the heat exchange tubes, and these places are mostly vulnerable parts of the heat exchange tubes, that is, it is difficult for the existing flaw detection and inspection machines to conduct comprehensive flaw detection on the heat exchange tubes. Utility Model Content

[0004] In view of the above-mentioned deficiencies, the utility model provides a heat exchange tube inner wall inspection device, which is installed on the inner wall of the heat exchange tube, and a driving mechanism is used to control the inspection device to move through the heat exchange tube, and a detection disk is used to perform flaw detection on the inner wall of the heat exchange tube, thereby achieving comprehensive flaw detection of the inner wall of the heat exchange tube, with little hindrance and high efficiency.

[0005] The utility model is realized by the following technical solutions:

[0006] A heat exchange tube inner wall inspection device is installed on the inner wall of the heat exchange tube. The inspection device includes a body, a driving mechanism, a tensioning mechanism, a support plate and a detection plate. A controller and a power supply are installed in the body, and a camera is provided in front of the body to detect the front field of view of the body. The driving mechanism is evenly distributed along the circumferential direction of the body, and the driving mechanism is located at the front end of the body. The driving mechanism includes a driving wheel and a crawler sleeved to the outside of the driving wheel to provide power for the inspection device to move. The tensioning mechanism connects the body and the driving mechanism, and the tensioning mechanism can adjust the distance between the driving mechanism and the body; the support plate is fixed to the end of the body, and a first slide groove is provided in the support plate, and a first spring and a first slider are provided in the first slide groove. The first slider is slidably connected to the first slide groove through the first spring, and a rolling body is provided on the side of the first slider away from the first spring. The detection plate is fixedly installed on the body, and the detection plate is connected to the controller data. The detection plate can detect the inner wall of the heat exchange tube, thereby realizing the detection operation of the inner wall of the heat exchange tube.

[0007] Furthermore, the tensioning mechanism includes a connecting frame, a limiting plate, a limiting block, a telescopic rod and a push-pull rod. The driving mechanism is installed on the machine body through the connecting frame. The driving mechanism and the machine body are both hinged to the connecting frame. The limiting plate is fixed to the machine body and a second slide groove is provided on the limiting plate. The limiting block is installed in the second slide groove and can slide along the extension direction of the second slide groove. The telescopic rod is installed on the machine body and can control the sliding distance of the limiting block. The limiting block can drive the driving mechanism to tighten or shrink through the push-pull rod. The tensioning mechanism is adopted so that the driving mechanism can always abut against the inner wall of the heat exchange tube when it is running, thereby improving the stability of the driving mechanism when it is driven.

[0008] Furthermore, the driving mechanism is provided with three groups, and the number of the driving mechanism and the tensioning mechanism is the same, and each telescopic rod is connected to the controller signal to improve the stability of the driving mechanism during movement.

[0009] Furthermore, the driving mechanism also includes a tensioning wheel, which abuts against the inner wall of the track to increase the adhesion between the track and the inner wall of the heat exchange tube, thereby improving the driving performance.

[0010] Furthermore, the outer wall of the crawler is an arc-shaped surface, and the curvature of the outer wall of the crawler is consistent with the curvature of the inner wall of the heat exchange tube, thereby increasing the contact area between the crawler and the heat exchange tube arm and improving the travel stability.

[0011] Furthermore, the outer wall of the crawler track is also provided with a plurality of arc-shaped anti-skid strips, and the arc-shaped anti-skid strips are evenly distributed along the extension direction of the crawler track.

[0012] Furthermore, the inspection device also includes an alarm, which is fixedly mounted on the machine body and connected to the controller signal, so as to facilitate locating and finding the position of the inspection device and the damaged part of the heat exchange tube.

[0013] Beneficial effects of the utility model:

[0014] 1. By installing the inspection device on the inner wall of the heat exchange tube, the driving mechanism is used to control the inspection device to travel in the heat exchange tube, and the inner wall of the heat exchange tube is inspected by the inspection disk, so as to realize comprehensive inspection of the inner wall of the heat exchange tube, with little obstacle and high efficiency;

[0015] 2. The driving mechanism adopts a crawler design to improve the stability of the driving mechanism when driving the inspection device to move in the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A connection diagram for illustrating a schematic implementation of a heat exchange tube inner wall inspection device in the utility model;

[0017] Figure 2 A schematic structural diagram for illustrating a schematic implementation of a heat exchange tube inner wall inspection device in the utility model;

[0018] Figure 3 A structural schematic diagram for illustrating another exemplary implementation of a heat exchange tube inner wall inspection device in the utility model;

[0019] Figure 4 A cross-sectional view for illustrating a schematic implementation of a heat exchange tube inner wall inspection device in the utility model;

[0020] Figure 5 A side view for illustrating a schematic implementation of a heat exchange tube inner wall inspection device in the utility model;

[0021] Figure 6 A structural schematic diagram for illustrating a schematic implementation of the crawler in the utility model.

[0022] List of parts and reference numerals:

[0023] 1. Heat exchange tube; 2. Machine body; 3. Camera; 4. Driving mechanism; 41. Driving wheel; 42. Track; 43. Tensioning wheel; 44. Arc anti-skid strip; 5. Tensioning mechanism; 51. Connecting frame; 52. Limiting plate; 53. Limiting block; 54. Telescopic rod; 55. Push-pull rod; 56. Second slide groove; 6. Support plate; 61. First slide groove; 62. First spring; 63. First slider; 64. Rolling body; 7. Detection plate; 8. Alarm. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0026] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention are not only changes in position, but also include movements such as rotation and rolling where there is no relative change in position but a change in state.

[0027] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0028] like Figures 1 to 6 The heat exchange tube inner wall inspection device shown is installed on the inner wall of the heat exchange tube 1. The inspection device includes a body 2, a driving mechanism 4, a tensioning mechanism 5, a support plate 6 and a detection plate 7. A controller and a power supply are installed in the body 2. A camera 3 is provided in front of the body 2 to detect the front view of the body 2. The driving mechanism 4 is evenly distributed along the circumferential direction of the body 2, and the driving mechanism 4 is located at the front end of the body 2. The driving mechanism 4 includes a driving wheel 41 and a crawler 42 sleeved on the outside of the driving wheel 41 to provide power for the inspection device to move. The tensioning mechanism 5 connects the body 2 and the driving mechanism 4, and the tensioning mechanism 5 can adjust the distance between the driving mechanism 4 and the body 2; the support plate 6 is fixed to the end of the body 2, and a first slide groove 61 is provided in the support plate 6, and a first spring 62 and a first slider 63 are provided in the first slide groove 61. The first slider 63 is slidably connected to the first slide groove 61 through the first spring 62, and a rolling body 64 is provided on the side of the first slider 63 away from the first spring 62. The inspection disk 7 is fixedly mounted to the machine body 2 , and the inspection disk 7 is data-connected to the controller. The inspection disk 7 can perform flaw detection on the inner wall of the heat exchange tube 1 , thereby realizing the flaw detection operation on the inner wall of the heat exchange tube 1 .

[0029] In one embodiment, first, the main body of the inspection device is inserted into the heat exchange tube 1. It should be noted that when the inspection mechanism is loaded into the heat exchange tube 1, the slider needs to be pressed so that the slider and the rolling body 64 are located in the chute. When the inspection device is completely loaded into the heat exchange tube 1, the slider moves along the chute toward the inner wall of the heat exchange tube 1 under the action of the spring until the rolling body 64 at the top of the slider abuts against the inner wall of the heat exchange tube 1. Then, the controller controls the telescopic rod 54 to extend, and the telescopic rod 54 pushes the limit block 53 to move along the second chute 56 toward the direction close to the drive mechanism 4. The limit block 53 pushes the drive mechanism 4 through the push-pull rod 55, so that the drive mechanism 4 is opened relative to the body 2 through the connecting frame 51, until the tracks 42 of the three drive mechanisms 4 abut against the inner wall of the heat exchange tube 1. Finally, the controller drives the driving mechanism 4 so that the driving mechanism 4 drives the entire inspection device to run along the extension direction of the heat exchange tube 1, and synchronously opens the detection disk 7, which can perform flaw detection on the inner wall of the heat exchange tube 1. It should be noted that the flaw detection of the heat exchange tube 1 by the detection disk 7 belongs to the prior art, and the detection principle and structure of the detection disk 7 will not be described in detail here.

[0030] Preferably, the tensioning mechanism 5 includes a connecting frame 51, a limiting plate 52, a limiting block 53, a telescopic rod 54 and a push-pull rod 55. The driving mechanism 4 is mounted to the machine body 2 through the connecting frame 51. The driving mechanism 4 and the machine body 2 are both hingedly arranged with the connecting frame 51. The limiting plate 52 is fixed to the machine body 2 and a second slide groove 56 is provided on the limiting plate 52. The limiting block 53 is mounted to the second slide groove 56 and can slide along the extension direction of the second slide groove 56. The telescopic rod 54 is mounted to the machine body 2 and can control the sliding distance of the limiting block 53. The limiting block 53 can drive the driving mechanism 4 to tighten or shrink through the push-pull rod 55. The tensioning mechanism 5 is adopted so that the driving mechanism 4 can always abut against the inner wall of the heat exchange tube 1 when it is running, thereby improving the stability of the driving mechanism 4 when it is driven.

[0031] Preferably, three groups of driving mechanisms 4 are provided, and the number of driving mechanisms 4 and tensioning mechanisms 5 is the same, and each telescopic rod 54 is connected to the controller signal to improve the stability of the driving mechanism 4 when traveling.

[0032] like Figure 1 As shown, four first slide grooves 61 are provided on the support plate 6, and the four first slide grooves 61 are evenly distributed along the circumferential direction of the support plate 6, and the four rolling bodies 64 abut against the inner wall of the heat exchange tube 1 at the same time to achieve the rear support of the inspection device.

[0033] Preferably, the driving mechanism 4 further includes a tensioning wheel 43, which abuts against the inner wall of the track 42 to increase the adhesion between the track 42 and the inner wall of the heat exchange tube 1, thereby improving the driving performance.

[0034] Preferably, the outer wall of the crawler 42 is an arc-shaped surface, and the curvature of the outer wall of the crawler 42 is consistent with the curvature of the inner wall of the heat exchange tube 1, thereby increasing the contact area between the crawler 42 and the arm of the heat exchange tube 1 and improving the traveling stability.

[0035] Preferably, the outer wall of the crawler 42 is further provided with a plurality of arc-shaped anti-skid strips 44 , and the arc-shaped anti-skid strips 44 are evenly distributed along the extension direction of the crawler 42 .

[0036] Preferably, the inspection device further comprises an alarm 8 , which is mounted and fixed to the machine body 2 , and the alarm 8 is connected to the controller signal, so as to facilitate locating and finding the position of the inspection device and the damaged part of the heat exchange tube 1 .

[0037] In one embodiment, when the detection disk 7 detects damage inside the heat exchange tube 1, the detection disk 7 sends a damage signal to the controller, and the controller can control the driving mechanism 4 to stop moving and simultaneously send alarm data to the alarm 8. The alarm 8 emits an alarm sound to prompt the staff to come and deal with it, thereby realizing the search and alarm of the damaged part of the heat exchange tube 1.

[0038] When the above-mentioned inspection device for the inner wall of a heat exchange tube is used, the inspection device is installed on the inner wall of the heat exchange tube 1, the driving mechanism 4 is used to control the inspection device to move through the heat exchange tube 1, and the inner wall of the heat exchange tube 1 is inspected by the inspection disk 7, so that comprehensive inspection of the inner wall of the heat exchange tube 1 is achieved, and the inspection has little hindrance and high efficiency.

[0039] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A heat exchange tube inner wall inspection device, installed on the inner wall of the heat exchange tube, characterized in that: The inspection device comprises: A machine body, wherein a controller and a power supply are installed in the machine body, and a camera is arranged in front of the machine body; A driving mechanism, wherein the driving mechanism is evenly distributed along the circumferential direction of the machine body and is located at the front end of the machine body, and the driving mechanism comprises a driving wheel and a crawler track sleeved to the outer side of the driving wheel; A tensioning mechanism, the tensioning mechanism connecting the machine body and the driving mechanism, the tensioning mechanism being capable of adjusting the distance between the driving mechanism and the machine body; A support plate, the support plate is fixed to the end of the body, a first slide groove is provided in the support plate, a first spring and a first slider are provided in the first slide groove, the first slider is slidably connected to the first slide groove through the first spring, and a rolling body is provided on a side of the first slider away from the first spring; The detection plate is fixedly mounted to the machine body and is data-connected to the controller. The detection plate can detect flaws on the inner wall of the heat exchange tube.

2. A heat exchange tube inner wall inspection device according to claim 1, characterized in that: The tensioning mechanism includes a connecting frame, a limiting plate, a limiting block, a telescopic rod and a push-pull rod. The driving mechanism is installed to the machine body through the connecting frame. The driving mechanism and the machine body are both hinged to the connecting frame. The limiting plate is fixed to the machine body and a second slide groove is provided on the limiting plate. The limiting block is installed to the second slide groove and can slide along the extension direction of the second slide groove. The telescopic rod is installed to the machine body and can control the sliding distance of the limiting block. The limiting block can drive the driving mechanism to tighten or shrink through the push-pull rod.

3. A heat exchange tube inner wall inspection device according to claim 2, characterized in that: The driving mechanism is provided with three groups, and the number of the driving mechanism is the same as that of the tensioning mechanism, and each of the telescopic rods is connected to the controller signal.

4. A heat exchange tube inner wall inspection device according to claim 1, characterized in that: The driving mechanism further comprises a tensioning wheel, wherein the tensioning wheel abuts against an inner wall of the crawler track.

5. The heat exchange tube inner wall inspection device according to claim 1, characterized in that: The outer wall of the crawler is an arc-shaped surface, and the curvature of the outer wall of the crawler is consistent with the curvature of the inner wall of the heat exchange tube.

6. A heat exchange tube inner wall inspection device according to claim 2, characterized in that: The outer wall of the crawler is also provided with a plurality of arc-shaped anti-skid strips, and the arc-shaped anti-skid strips are evenly distributed along the extension direction of the crawler.

7. The heat exchange tube inner wall inspection device according to claim 1, characterized in that: The inspection device further comprises an alarm, which is fixedly mounted on the machine body and is connected to the controller by signal.

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