CN221803917U - Crack detection device for inner surface of boiler pressure vessel - Google Patents

Abstract

The utility model relates to the technical field of boiler detection, in particular to a crack detection device for the inner surface of a boiler pressure vessel, which comprises a bottom plate, wherein two pairs of supporting legs are fixedly arranged on the bottom plate, each pair of supporting legs is rotationally connected with a central shaft, a roller is fixedly connected onto the central shaft, a conveyor belt is sleeved onto the roller, a first motor is fixedly arranged on one of the supporting legs, and an output shaft of the first motor is fixedly connected with one end of one of the central shafts. This device is rotated through one of them center pin of first motor drive, can make the rotatory conveyer belt transmission that drives of cylinder, and the pressure vessel that needs to detect is placed on the conveyer belt and is conveyed corresponding position, is conveyed away again after the detection is accomplished, and next pressure vessel continues to be conveyed and detects, can realize lasting detection, raises the efficiency.

Description

A boiler pressure vessel inner surface crack detection device

Technical Field

The utility model relates to the technical field of boiler detection, in particular to a device for detecting cracks on the inner surface of a boiler pressure vessel.

Background Art

Boilers, pressure vessels and pressure pipes are indispensable equipment in many industrial fields. They are used to produce and provide steam, hot water and compressed air, etc. These equipment play an important role in chemical, electric power, pharmaceutical, food processing and other industries. However, the long-term operation of these equipment and the work under high temperature and high pressure conditions make them vulnerable to various damages, including crack problems. Stress corrosion cracking is a serious problem in boilers, pressure vessels and pressure pipes. It is caused by the combined effects of stress and corrosive media on metal materials. The formation mechanism of this crack is very complex, mainly involving the interaction between corrosive media and metals. Therefore, it is crucial to detect and take preventive measures in time to deal with stress corrosion cracking.

The Chinese patent with publication number CN218272100U discloses a device for detecting cracks on the inner surface of a boiler pressure vessel, which includes a magnetic particle flaw detector body, a movable frame, and an adjustment component for controlling the movement of the movable frame. A detection mechanism is arranged on the inner side of the movable frame, and the adjustment component includes a movable rod and a push rod. The movable rod is arranged on the top of the movable frame, and the push rod is arranged above the movable rod and is rotatably connected to the movable rod. A control mechanism is arranged on the push rod. The device for detecting cracks on the inner surface of a boiler pressure vessel can freely adjust the position and angle of the detection mechanism to ensure that the detection mechanism can fit the inner wall of the boiler, thereby facilitating detection.

Based on the above search and combined with the prior art, we found that:

The existing device detects the inner surface of the boiler by magnetic particle detection. When cracks appear on the inner surface, the corresponding magnetized parts will escape magnetic lines and form a leakage magnetic field. However, the use of magnetic particle detection will cause magnetic particles to adhere to the inside of the boiler. Cleaning after detection is troublesome and the method of using magnetic particle detection has many steps, so the detection efficiency is not high, which is not conducive to practical use.

Utility Model Content

In order to solve the above technical problems, the utility model proposes a boiler pressure vessel inner surface crack detection device, the device is provided with two pairs of supporting feet on the bottom plate, each pair of supporting feet is rotatably connected with a central shaft, a roller is fixedly installed on the central shaft, one of the central shafts is driven to rotate by a first motor, so that the roller can rotate to drive the conveyor belt to drive, the pressure vessel to be detected is placed on the conveyor belt and conveyed to the corresponding position, and then conveyed out after the detection is completed, and the next pressure vessel continues to be conveyed for detection, which can realize continuous detection and improve efficiency. The device adopts an ultrasonic detection method. After the pressure vessel to be detected reaches the corresponding position, the second motor is started to rotate the threaded rod, and the load-bearing plate can be adjusted to the corresponding height. The ultrasonic flaw detector is set at Under the bearing plate, after adjusting the ultrasonic flaw detector to the inside of the pressure vessel, the third motor is started, and the third motor drives the connecting column to rotate, and the connecting cylinder fixedly connected to the connecting column through the extension block is driven to rotate, and a rotating rod is fixedly installed on the connecting cylinder, and the rotating rod is rotatably connected to the fixed frame, and the fixed frame is rotatably connected to the mounting column. When the connecting column rotates, the ultrasonic flaw detector can rotate in all directions inside, and can inspect the inside of the pressure vessel. After the inspection is completed, the threaded rod is rotated to make the ultrasonic flaw detector leave the inside of the pressure vessel and wait for the next pressure vessel to arrive for inspection. This solves the problem that when using magnetic particle inspection, the inside of the boiler will be attached with magnetic powder, and cleaning after inspection is more troublesome, and the method of using magnetic particle inspection has more steps, the inspection efficiency is not high, and it is not conducive to practical use.

The technical solution to achieve the purpose of the utility model is: a boiler pressure vessel inner surface crack detection device, including a base plate, two pairs of supporting feet are fixedly installed on the base plate, each pair of the supporting feet is rotatably connected to a central shaft, a roller is fixedly connected to the central shaft, a conveyor belt is sleeved on the roller, a first motor is fixedly installed on one of the supporting feet, and the output shaft of the first motor is fixedly connected to one end of one of the central shafts.

In some embodiments, a pair of fixed blocks are fixedly mounted on the base plate, a pair of the fixed blocks are rotatably connected to a threaded rod, a pair of the threaded rods are rotatably connected to a mounting plate, a pair of second motors are fixedly mounted on the mounting plate, and the output shaft of the second motor is fixedly connected to one end of the threaded rod.

In some embodiments, a pair of threaded rods are threadedly connected to a supporting plate, a connecting column is rotatably connected to the supporting plate, a third motor is fixedly mounted on the supporting plate, and an output shaft of the third motor is fixedly connected to one end of the connecting column.

In some embodiments, an extension block is fixedly mounted on the connecting column, a connecting tube is fixedly mounted on the extension block, an extension column is fixedly mounted on the connecting tube, and an ultrasonic flaw detector is fixedly mounted on the other end of the extension column.

In some embodiments, a pair of support plates are fixedly mounted on the carrier plate, and each of the pair of support plates is fixedly connected to a mounting column, and the other end of the mounting column is rotatably connected to a fixed frame, and a rotating rod is rotatably connected to the fixed frame, and the rotating rod is fixedly connected to the connecting tube.

Compared with the prior art, the present invention has the following significant advantages:

First, the utility model aims at the existing device, which has the problem that the use of magnetic particle detection will cause magnetic particles to adhere to the inside of the boiler, which is troublesome to clean after detection, and the method of using magnetic particle detection has many steps, the detection efficiency is low, and it is not conducive to practical use. The device is provided with two pairs of supporting feet on the bottom plate, and each pair of supporting feet is rotatably connected with a central axis, and a roller is fixedly installed on the central axis. The first motor drives one of the central axes to rotate, so that the rotation of the roller drives the conveyor belt to drive. The pressure vessel to be inspected is placed on the conveyor belt and transported to the corresponding position. After the inspection is completed, it is transported out, and the next pressure vessel continues to be transported for inspection, which can realize continuous inspection and improve efficiency. The device adopts ultrasonic detection. After the pressure vessel to be measured reaches the corresponding position, the supporting plate can be adjusted to the corresponding height by starting the second motor to rotate the threaded rod. The ultrasonic flaw detector is arranged under the supporting plate. After the ultrasonic flaw detector is adjusted to the inside of the pressure vessel, the third motor is started. The third motor drives the connecting column to rotate, and the connecting cylinder fixedly connected to the connecting column through the extension block is driven to rotate. A rotating rod is fixedly installed on the connecting cylinder, the rotating rod is rotatably connected to the fixed frame, and the fixed frame is rotatably connected to the mounting column. When the connecting column rotates, the ultrasonic flaw detector can rotate in all directions inside and can detect the inside of the pressure vessel. After the detection is completed, the threaded rod is rotated to make the ultrasonic flaw detector leave the inside of the pressure vessel and wait for the next pressure vessel to arrive for detection.

BRIEF DESCRIPTION OF THE DRAWINGS

The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

FIG1 is a schematic diagram of an overall three-dimensional structure from a first viewing angle provided by an embodiment of the present invention;

FIG2 is a schematic diagram of the overall three-dimensional structure of the second viewing angle provided by the utility model in one embodiment;

FIG3 is a schematic diagram of the structure of an ultrasonic flaw detector provided in one embodiment of the present invention.

Explanation of the accompanying drawings: 1. Base plate; 2. Support foot; 3. Center axis; 4. Roller; 5. Conveyor belt; 6. First motor; 7. Fixed block; 8. Threaded rod; 9. Mounting plate; 10. Second motor; 11. Load-bearing plate; 12. Connecting column; 13. Third motor; 14. Extension block; 15. Connecting cylinder; 16. Extension column; 17. Ultrasonic flaw detector; 18. Support plate; 19. Mounting column; 20. Fixed frame; 21. Rotating rod.

DETAILED DESCRIPTION

The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

The utility model provides a boiler pressure vessel inner surface crack detection device through improvement. The technical solution of the utility model is:

As shown in Figures 1 and 2, a boiler pressure vessel inner surface crack detection device includes a base plate 1, two pairs of supporting legs 2 are fixedly installed on the base plate 1, each pair of supporting legs 2 is rotatably connected to a central axis 3, a roller 4 is fixedly connected to the central axis 3, a conveyor belt 5 is sleeved on the roller 4, a first motor 6 is fixedly installed on one of the supporting legs 2, and the output shaft of the first motor 6 is fixedly connected to one end of one of the central axes 3. The device is provided with two pairs of supporting legs 2 on the base plate 1, each pair of supporting legs 2 is rotatably connected to a central axis 3, a roller 4 is fixedly installed on the central axis 3, and one of the central axes 3 is driven to rotate by the first motor 6, so that the roller 4 can rotate and drive the conveyor belt 5 to transmit. The pressure vessel to be inspected is placed on the conveyor belt 5 and transported to the corresponding position. After the inspection is completed, it is transported out, and the next pressure vessel continues to be transported for inspection, which can achieve continuous inspection and improve efficiency.

As shown in Figures 1 to 3, a pair of fixing blocks 7 are fixedly installed on the bottom plate 1, and a threaded rod 8 is rotatably connected to the pair of fixing blocks 7. A mounting plate 9 is rotatably connected to the pair of threaded rods 8. A pair of second motors 10 are fixedly installed on the mounting plate 9. The output shaft of the second motor 10 is fixedly connected to one end of the threaded rod 8. A bearing plate 11 is threadedly connected to the pair of threaded rods 8. A connecting column 12 is rotatably connected to the bearing plate 11. A third motor 13 is fixedly installed on the bearing plate 11. The output shaft of the third motor 13 is fixedly connected to one end of the connecting column 12. An extension block 14 is fixedly mounted on the connecting column 12, a connecting tube 15 is fixedly mounted on the extending block 14, an extension column 16 is fixedly mounted on the connecting tube 15, an ultrasonic flaw detector 17 is fixedly mounted on the other end of the extension column 16, a pair of support plates 18 are fixedly mounted on the bearing plate 11, a pair of support plates 18 are fixedly connected to mounting columns 19, the other end of the mounting column 19 is rotatably connected to a fixed frame 20, a rotating rod 21 is rotatably connected to the fixed frame 20, and the rotating rod 21 is fixedly connected to the connecting tube 15. The device adopts an ultrasonic detection method. In the embodiment of the present invention, after the pressure vessel to be inspected reaches the corresponding position, the second motor 10 is started to rotate the threaded rod 8, so that the bearing plate 11 can be adjusted to the corresponding height. The ultrasonic flaw detector 17 is arranged below the bearing plate 11. After the ultrasonic flaw detector 17 is adjusted to the inside of the pressure vessel, the third motor 13 is started. The third motor 13 drives the connecting column 12 to rotate, and the connecting cylinder 15 fixedly connected to the connecting column 12 through the extension block 14 is driven to rotate. A rotating rod 21 is fixedly installed on the connecting cylinder 15, and the rotating rod 21 is rotatably connected to the fixed frame 20, and the fixed frame 20 is rotatably connected to the mounting column 19. When the connecting column 12 rotates, the ultrasonic flaw detector 17 can rotate in all directions inside, so as to inspect the inside of the pressure vessel. After the inspection is completed, the threaded rod 8 is rotated to make the ultrasonic flaw detector 17 leave the inside of the pressure vessel and wait for the next pressure vessel to arrive for inspection. The problem that the internal part of the boiler is stained with magnetic powder when using magnetic powder inspection, the cleaning after inspection is troublesome, and the method of using magnetic powder inspection has many steps, the inspection efficiency is not high, and it is not conducive to practical use is solved.

The specific working method is as follows: the device is provided with two pairs of supporting feet 2 on the bottom plate 1, each pair of supporting feet 2 is rotatably connected with a central axis 3, and a roller 4 is fixedly installed on the central axis 3. By driving one of the central axes 3 to rotate through the first motor 6, the roller 4 can be rotated to drive the conveyor belt 5 to transmit. The pressure vessel to be inspected is placed on the conveyor belt 5 and conveyed to the corresponding position. After the inspection is completed, it is conveyed out again, and the next pressure vessel continues to be conveyed for inspection, which can realize continuous inspection and improve efficiency. The device adopts an ultrasonic inspection method. After the pressure vessel to be inspected reaches the corresponding position, the second motor 10 is started to rotate the threaded rod 8, and the bearing plate 11 can be adjusted to the corresponding height. The ultrasonic flaw detector 17 is arranged under the bearing plate 11. The ultrasonic flaw detector 17 is adjusted to the pressure vessel. After the third motor 13 is installed inside the pressure vessel, the third motor 13 drives the connecting column 12 to rotate, and the connecting tube 15 fixedly connected to the connecting column 12 through the extension block 14 is driven to rotate, and a rotating rod 21 is fixedly installed on the connecting tube 15, and the rotating rod 21 is rotatably connected to the fixed frame 20, and the fixed frame 20 is rotatably connected to the mounting column 19. When the connecting column 12 rotates, the ultrasonic flaw detector 17 can rotate in all directions inside, and can detect the inside of the pressure vessel. After the detection is completed, the threaded rod 8 is rotated to make the ultrasonic flaw detector 17 leave the inside of the pressure vessel and wait for the next pressure vessel to arrive for detection, which solves the problem that when using magnetic particle detection, the inside of the boiler will be stained with magnetic powder, and the cleaning after detection is more troublesome, and the method of using magnetic particle detection has more steps, the detection efficiency is not high, and it is not conducive to actual use.

The technical means disclosed in the utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the utility model belong to the common knowledge of those skilled in the art.

Claims (5)

1. A boiler pressure vessel inner surface crack detection device, comprising a base plate (1), characterized in that two pairs of supporting legs (2) are fixedly mounted on the base plate (1), each pair of the supporting legs (2) is rotatably connected to a central shaft (3), a roller (4) is fixedly connected to the central shaft (3), a conveyor belt (5) is sleeved on the roller (4), a first motor (6) is fixedly mounted on one of the supporting legs (2), and an output shaft of the first motor (6) is fixedly connected to one end of one of the central shafts (3). 2. A boiler pressure vessel inner surface crack detection device according to claim 1, characterized in that: a pair of fixed blocks (7) are fixedly installed on the bottom plate (1), a pair of the fixed blocks (7) are rotatably connected to a threaded rod (8), a pair of the threaded rods (8) are rotatably connected to a mounting plate (9), a pair of second motors (10) are fixedly installed on the mounting plate (9), and the output shaft of the second motor (10) is fixedly connected to one end of the threaded rod (8). 3. A boiler pressure vessel inner surface crack detection device according to claim 2, characterized in that: a pair of the threaded rods (8) are threadedly connected to a bearing plate (11), a connecting column (12) is rotatably connected to the bearing plate (11), a third motor (13) is fixedly mounted on the bearing plate (11), and an output shaft of the third motor (13) is fixedly connected to one end of the connecting column (12). 4. A boiler pressure vessel inner surface crack detection device according to claim 3, characterized in that: an extension block (14) is fixedly mounted on the connecting column (12), a connecting tube (15) is fixedly mounted on the extension block (14), an extension column (16) is fixedly mounted on the connecting tube (15), and an ultrasonic flaw detector (17) is fixedly mounted on the other end of the extension column (16). 5. A boiler pressure vessel inner surface crack detection device according to claim 3, characterized in that: a pair of support plates (18) are fixedly installed on the bearing plate (11), and a mounting column (19) is fixedly connected to the pair of support plates (18), and the other end of the mounting column (19) is rotatably connected to a fixed frame (20), and a rotating rod (21) is rotatably connected to the fixed frame (20), and the rotating rod (21) is fixedly connected to the connecting tube (15).