Device for detecting wall thickness of water cooling wall of boiler

Abstract

The utility model discloses a boiler water wall thickness detection device, which relates to the technical field of boiler detection, and comprises a walking track, a walking mechanism, a lifting mechanism and a detection mechanism, the walking track is used for being fixed at the top of the inner wall of a boiler, and the walking mechanism is movably connected to the walking track and can walk along the horizontal direction; the lifting mechanism is fixedly connected with an output piece of the walking mechanism, the detection mechanism is connected to the output piece of the lifting mechanism, the lifting mechanism is used for driving the detection mechanism to ascend and descend, the detection mechanism can be adsorbed to the water cooling wall of the boiler and detect the thickness of the water cooling wall, and position movement of the detection mechanism is achieved through the walking mechanism and the lifting mechanism. The thickness of the water cooling wall can be detected, and the early-stage workload is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler detection, in particular to a boiler water-cooling wall thickness detection device. Background Art

[0002] Steam boilers or hot water boilers are widely used in industrial production. The water-cooled wall is the main heat-receiving part of the boiler. It is composed of several rows of steel pipes and is distributed around the boiler furnace. The water-cooled wall receives the heat from the flame in the boiler furnace and heats the water or steam flowing inside the water-cooled wall. Under long-term high-load operation, the coal used by the boiler contains sulfur and other harmful impurities, which can easily cause corrosion to the water-cooled wall, resulting in thinning of the wall thickness. If it is not discovered in time during inspection, the water-cooled wall is too thin to withstand the pressure of the circulating coolant, which will cause sudden pipe burst accidents and affect the safe operation of the boiler. Therefore, it is necessary to regularly inspect the boiler wall thickness; China Utility Model Patent CN105438293B discloses a water-cooled wall climbing robot that uses a single spring to connect a magnet bracket. An ultrasonic thickness gauge probe is installed on the wheel bracket, and a magnet is fixed on the wheel group, relying on magnetic adsorption. On the water-cooled wall, in order to achieve fixation or position movement on the water-cooled wall, but when the wall-climbing robot moves, the magnet on the wheel group contacts or separates from the surface of the water-cooled wall as the wheel group rotates. Compared with the fixed state, the probability of magnet failure is higher, and the adsorption force needs to overcome the mass of all components on the wall-climbing robot. Therefore, the adsorption force requirements are relatively high. When the thickness of the slag adsorbed on the water-cooled wall is large, it will affect the adsorption force of the robot on the water-cooled wall. Therefore, before the water-cooled wall thickness detection, the slag adsorbed on the water-cooled wall needs to be cleaned in order for the robot to work normally, and the amount of preliminary preparation work is large. Utility Model Content

[0003] The utility model aims to provide a boiler water-cooled wall thickness detection device to solve the problems existing in the above-mentioned prior art, can detect the boiler water-cooled wall thickness, and can reduce the initial workload.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides a boiler water-cooled wall thickness detection device, comprising a walking track, a walking mechanism, a lifting mechanism and a detection mechanism, wherein the walking track is used to be fixed on the top of the boiler inner wall, the walking mechanism is movably connected to the walking track and can walk in a horizontal direction, the lifting mechanism is fixedly connected to an output member of the walking mechanism, the detection mechanism is connected to the output member of the lifting mechanism, the lifting mechanism is used to drive the detection mechanism to rise and fall, and the detection mechanism can be adsorbed on the boiler water-cooled wall and detect the thickness of the water-cooled wall.

[0006] Preferably, limiting structures are respectively provided at both ends of the walking track, and the limiting structures are used to limit the moving range of the walking mechanism on the walking track.

[0007] Preferably, the walking mechanism includes a walking motor and a walking trolley, the walking motor is fixedly connected to the walking trolley, the walking trolley has a walking wheel group and is movably connected to the walking track through the walking wheel group, the output shaft of the walking motor is connected to the walking wheel group and drives the walking wheel group to rotate; the lifting mechanism includes a lifting motor, a lifting rope and a lifting rope drum, the lifting motor is fixedly connected to the walking trolley, the output shaft of the lifting motor is fixedly connected to the lifting rope drum and can drive the lifting rope drum to rotate, one end of the lifting rope is fixedly connected to the lifting rope drum, and the other end of the lifting rope is fixedly connected to the detection mechanism, and the rotation of the output shaft of the lifting motor can drive the lifting rope on the lifting rope drum to wind or release, thereby causing the detection mechanism to rise or fall in a vertical direction.

[0008] Preferably, the detection mechanism comprises a purging detection device, and the purging detection device is used to purge the slag on the water-cooled wall and detect the thickness of the water-cooled wall.

[0009] Preferably, the detection mechanism also includes a video acquisition device and an adsorption and fixing device, the video acquisition device is connected to the output part of the lifting mechanism, the purge detection device is connected to the video acquisition device, the adsorption and fixing device is connected to the purge detection device, the adsorption and fixing device can be adsorbed on the water-cooled wall, and the video acquisition device is used to photograph the corrosion of the water-cooled wall.

[0010] Preferably, the purge detection device includes a purge component, an ultrasonic detector, a coupling agent spraying component and a connecting piece, the connecting piece is connected to the video acquisition device, the purge component, the coupling agent spraying component and the ultrasonic detector are respectively fixedly connected to the connecting piece, the purge component is used to purge the slag on the water-cooled wall, the coupling agent spraying component is used to spray coupling agent on the water-cooled wall before thickness detection to fill the gap between the ultrasonic detector and the boiler water-cooled wall, and the ultrasonic detector is used to perform ultrasonic detection of the thickness of the water-cooled wall.

[0011] Preferably, the adsorption and fixing device comprises a telescopic cylinder and an adsorption member, the telescopic cylinder is connected to the purge detection device, and the adsorption member is fixedly connected to the end of the telescopic rod of the telescopic cylinder and can be adsorbed on the water-cooled wall.

[0012] Preferably, the video acquisition device comprises a camera and a lighting fixture, and the camera is connected to the lighting fixture.

[0013] Preferably, it also includes a controller located outside the boiler, the controller includes a walking mechanism control module, a lifting mechanism control module, an adsorption and fixing device control module, a purge detection device control module and a video acquisition device control module, the walking mechanism control module is connected to the walking mechanism signal, the lifting mechanism control module is connected to the lifting mechanism signal, the adsorption and fixing device control module is connected to the adsorption and fixing device signal, the purge detection device control module is connected to the purge detection device signal, and the video acquisition device control module is connected to the video acquisition device signal.

[0014] Preferably, it also includes a computer located outside the boiler, the walking wheel group is also fixedly connected to a first encoder for detecting the horizontal displacement of the walking trolley, the lifting rope drum is also fixedly connected to a second encoder for detecting the vertical displacement of the detection mechanism, the computer is signal-connected to the first photoelectric encoder and the second photoelectric encoder to receive and store the displacement data of the first encoder and the second encoder, the computer is signal-connected to the video acquisition device to receive and store the water-cooled wall corrosion image taken by the video acquisition device, and the computer is signal-connected to the ultrasonic detector to receive and store the wall thickness data measured by the ultrasonic detector.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The utility model provides a boiler water-cooled wall thickness detection device, comprising a walking track, a walking mechanism, a lifting mechanism and a detection mechanism. The walking track is used to be fixed on the top of the boiler. The walking mechanism drives the lifting mechanism to walk in the horizontal direction on the walking track, and the lifting mechanism drives the detection mechanism to lift in the vertical direction. The walking mechanism and the lifting mechanism drive the detection mechanism to realize spatial position movement. The position movement of the detection mechanism does not need to utilize the adsorption force on the water-cooled wall. Therefore, before the water-cooled wall thickness detection, it is not necessary to clean the slag adsorbed on the water-cooled wall, thereby reducing the initial workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a boiler water wall thickness detection device in one embodiment;

[0019] Figure 2is a schematic diagram of a detection mechanism of a boiler water wall thickness detection device in one embodiment;

[0020] Figure 3 is a schematic diagram of a controller of a boiler water wall thickness detection device in one embodiment;

[0021] Figure 4 A schematic diagram of a computer of a boiler water wall thickness detection device in one embodiment;

[0022] In the figure: 1-walking track; 11-limiting structure; 2-walking mechanism; 21-walking motor; 22-walking trolley; 221-walking wheel group; 222-first photoelectric encoder; 3-lifting mechanism; 31-lifting motor; 32-lifting rope; 33-lifting rope drum; 331-second photoelectric encoder; 4-detection mechanism; 41-video acquisition device; 411-camera; 412-lighting lamp; 42-adsorption and fixing device; 421-telescopic cylinder; 422-adsorption piece; 43-purge detection device; 431-purge assembly; 432-ultrasonic detector; 433-coupling agent spray assembly; 434-connecting piece; 5-controller; 52-walking mechanism control module; 53-lifting mechanism control module; 542-adsorption and fixing device control module; 543-purge detection device control module; 541-video acquisition device control module; 6-computer; 71-first bracket; 72-second bracket; 73-third bracket. DETAILED DESCRIPTION

[0023] 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.

[0024] The utility model aims to provide a boiler water-cooled wall thickness detection device to solve the problems existing in the above-mentioned prior art, which can detect the boiler water-cooled wall thickness and reduce the preparatory workload.

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The utility model provides a boiler water-cooled wall thickness detection device, such as Figure 1As shown, it includes a walking track 1, a walking mechanism 2, a lifting mechanism 3 and a detection mechanism 4. The walking track 1 is fixed to the top of the inner wall of the boiler by a fixed cable. The walking mechanism 2 is movably connected to the walking track 1 and can walk in the horizontal direction. The lifting mechanism 3 is fixedly connected to the output member of the walking mechanism 2. The detection mechanism 4 is connected to the output member of the lifting mechanism 3. The lifting mechanism 3 is used to drive the detection mechanism 4 to rise and fall. The walking mechanism 2 and the lifting mechanism 3 can realize the movement of the spatial position of the detection mechanism 4. Before the water-cooled wall thickness is detected, there is no need to clean the slag adsorbed on the water-cooled wall, which reduces the initial workload. After moving to the position to be detected, the detection mechanism 4 is adsorbed on the boiler water-cooled wall and detects the thickness of the water-cooled wall.

[0027] In another more preferred embodiment of the utility model, a limiting structure 11 is respectively provided at both ends of the walking track 1. The limiting structure 11 can be a columnar body or a limiting member of other shapes fixedly connected to the end of the walking track 1. The limiting mechanism 11 can block the movement of the walking mechanism 2 along the walking track 1, and is used to limit the moving range of the walking mechanism 2 on the walking track 1, so that the walking mechanism 2 is restricted within the range inside the boiler furnace.

[0028] In another more preferred embodiment of the utility model, the walking mechanism 2 includes a walking motor 21 and a walking trolley 22. The walking motor 21 is fixedly connected to the walking trolley 22. The walking trolley 22 has a walking wheel group 221 and is movably connected to the walking track 1 through the walking wheel group 221. The output shaft of the walking motor 21 is connected to the walking wheel group 221 and drives the walking wheel group 221 to rotate, so that the walking trolley 22 makes a horizontal linear motion along the walking track 1, thereby making the detection mechanism 4 move in the horizontal direction. Preferably, the number of the walking trolleys 22 is two, and the output shaft of the walking motor 21 is connected to the walking wheel group 221 of one walking trolley 22 and drives the walking wheel group 221 to rotate, and the walking wheel group 221 on the other walking trolley 22 is driven.

[0029] In another preferred embodiment of the present invention, the lifting mechanism 3 includes a lifting motor 31, a lifting rope 32 and a lifting rope drum 33. The lifting motor 31 is fixedly connected to the walking trolley 22. The output shaft of the lifting motor 31 is fixedly connected to the lifting rope drum 33 and can drive the lifting rope drum 33 to rotate. One end of the lifting rope 32 is fixedly connected to the lifting rope drum 33, and the other end of the lifting rope 32 is fixedly connected to the detection mechanism 4. The rotation of the output shaft of the lifting motor 31 can drive the lifting rope 32 on the lifting rope drum 33 to be wound or released, so that the detection mechanism 4 rises or falls in the vertical direction. Preferably, there are two lifting ropes 32 with equal length, one end of the two lifting ropes are fixedly connected to the lifting rope drum 33 at the same height position, and the other end of the two lifting ropes are fixedly connected to the detection mechanism 4 at the same height position, so that the detection mechanism 4 can maintain balance and stability during the lifting process. By controlling the walking mechanism 2 and the lifting mechanism 3, the detection mechanism is moved to the position to be detected and the thickness of the water-cooled wall is detected.

[0030] In another more preferred embodiment of the utility model, the device for driving the traveling trolley to perform horizontal linear motion along the traveling track 1 may include a motor and a ball screw, the ball screw is horizontally threadedly connected to the traveling trolley, the output shaft of the motor is fixedly connected to the ball screw, and the motor drives the ball screw to rotate, so that the traveling trolley performs horizontal linear motion along the traveling track 1.

[0031] In another more preferred embodiment of the utility model, the lifting mechanism includes an electric telescopic rod, the top end of the electric telescopic rod is fixedly connected to the walking trolley 22, and the bottom end is fixedly connected to the detection mechanism 4. The electric telescopic rod is extended or shortened so that the detection mechanism rises or falls in the vertical direction, and the vertical position of the detection mechanism 4 is determined by the extended length of the electric telescopic rod.

[0032] In another preferred embodiment of the present invention, the detection mechanism 4 includes a purge detection device 43, which purges the slag on the water-cooled wall and detects the thickness of the water-cooled wall. Purging the slag on the water-cooled wall first can improve the accuracy of measuring the thickness of the water-cooled wall.

[0033] In another preferred embodiment of the present invention, the detection mechanism 4 further includes an adsorption fixing device 42. Before detecting the thickness of the water-cooled wall, the adsorption fixing device 42 is first adsorbed on the water-cooled wall to align the purge detection device 43 with the position to be detected.

[0034] In another preferred embodiment of the present invention, the detection mechanism 4 further includes a video acquisition device 41, which is used to photograph the corrosion of the water-cooled wall, so that the operator can visually observe the condition of the water-cooled wall.

[0035] In another preferred embodiment of the utility model, the purge detection device 43 includes a purge component 431, an ultrasonic detector 432, a coupling agent spraying component 433 and a connecting piece 434, the connecting piece 434 is connected to the video acquisition mechanism 41, the purge component 431, the coupling agent spraying component 433 and the ultrasonic detector 432 are respectively fixedly connected to the connecting piece 434 and aligned with the detection position, the ultrasonic detector 432 is used to perform ultrasonic detection on the thickness of the water-cooled wall, the slag on the water-cooled wall is first purged by the purge component 431, which can improve the accuracy of the thickness measurement of the ultrasonic detector 432, and then the coupling agent is sprayed on the position to be detected on the water-cooled wall by the coupling agent spraying component 434 to fill the gap between the ultrasonic detector 432 and the boiler water-cooled wall, thereby improving the detection accuracy of the ultrasonic detector 432.

[0036] In another more preferred embodiment of the utility model, the purge detection device 43 includes a purge component, an eddy current thickness gauge and a connecting piece. The connecting piece is connected to the video acquisition mechanism 41. The purge component and the eddy current thickness gauge are respectively fixedly connected to the connecting piece and aligned with the detection position. The slag on the water-cooled wall is first purged by the purge component, and then the thickness of the water-cooled wall is detected by the eddy current thickness gauge. The eddy current thickness gauge can realize non-contact detection of the water-cooled wall.

[0037] In another more preferred embodiment of the utility model, the adsorption and fixing device 42 includes a telescopic cylinder 421 and an adsorption part 422. The telescopic cylinder 421 is connected to the purge detection device 43. The adsorption part is fixedly connected to the end of the telescopic rod of the telescopic cylinder 421 and can be adsorbed on the water-cooled wall, so that the ultrasonic detector 432 can be attached to the position to be detected on the water-cooled wall to detect the thickness of the water-cooled wall.

[0038] In another more preferred embodiment of the utility model, the adsorption and fixing device includes a telescopic cylinder and an adsorption piece. The telescopic cylinder is connected to the purge detection device 43. The adsorption piece is fixedly connected to the end of the telescopic rod of the telescopic cylinder and can be adsorbed on the water-cooled wall, so that the ultrasonic detector 432 can be attached to the position to be detected on the water-cooled wall to detect the thickness of the water-cooled wall.

[0039] In another more preferred embodiment of the utility model, the adsorption and fixing device includes an electric telescopic rod, which is connected to the purge detection device 43. The adsorption piece is fixedly connected to the end of the electric telescopic rod and can be adsorbed on the water-cooled wall, so that the ultrasonic detector 432 is attached to the position to be detected on the water-cooled wall to detect the thickness of the water-cooled wall.

[0040] In another preferred embodiment of the present invention, the adsorption member 432 is an electromagnet, which generates magnetism by energizing to adsorb the water-cooled wall.

[0041] In another preferred embodiment of the present invention, the adsorbent 432 is a vacuum suction cup, which is adsorbed on the water-cooled wall by vacuuming the suction cup.

[0042] In another preferred embodiment of the utility model, the video acquisition device 41 includes a camera 411 and a lighting fixture 412. The lighting fixture 412 is connected to the camera 411. The camera 411 shoots the corrosion of the water-cooled wall under the illumination of the lighting fixture 412, which is convenient for the staff to observe intuitively.

[0043] In another more preferred embodiment of the utility model, one end of the lifting rope 32 is fixedly connected to the lifting rope drum 33, the other end of the lifting rope 32 is fixedly connected to the top of the first bracket 71, the upper surface of the video acquisition device 41 is fixedly connected to the bottom end of the first bracket 71, the lower surface of the video acquisition device 41 is fixedly connected to the top of the second bracket 72, the upper surface of the purge detection device 43 is fixedly connected to the bottom end of the second bracket 72, the lower surface of the purge detection device 43 is fixedly connected to the top of the third bracket 73, and the upper surface of the adsorption fixing device 42 is fixedly connected to the bottom end of the third bracket 73, so that the video acquisition device 41, the adsorption fixing device 42 and the purge detection device 43 in the detection mechanism 4 can be connected together, and the detection mechanism 4 is connected to the lifting rope 32.

[0044] In another preferred embodiment of the utility model, the boiler water-cooled wall thickness detection device also includes a controller 5 located outside the boiler, and the controller 5 includes a walking mechanism control module 52, a lifting mechanism control module 53, an adsorption and fixing device control module 542, a purge detection device control module 543 and a video acquisition device control module 541. The walking mechanism control module 52 is connected to the walking mechanism 2 signal through a control cable, and is used to control the horizontal movement of the walking trolley 22 along the walking track 1. The lifting mechanism control module 53 is connected to the lifting mechanism 3 signal through a control cable, and is used to control the vertical movement of the detection mechanism 4. The adsorption and fixing device control module Block 542 is connected to the adsorption fixing device 42 by signal through a control cable, and is used to control the adsorption fixing device 42 to be adsorbed on the water-cooled wall or to release the adsorption. The purge detection device control module 543 is connected to the purge detection device 43 by signal through a control cable, and can control whether the purge component 431 purges the slag, and also controls whether the coupling agent spraying component 434 sprays the coupling agent on the position to be detected on the water-cooled wall, and controls whether the ultrasonic detector 432 performs ultrasonic detection on the thickness of the water-cooled wall. The video acquisition device control module 541 is connected to the video acquisition device 41 by signal through a control cable, and is used to control whether the video acquisition device 41 takes pictures.

[0045] In another preferred embodiment of the utility model, the boiler water-cooled wall thickness detection device also includes a computer 6 located on the outside of the boiler, and a first encoder is fixedly connected to the walking wheel group for detecting the horizontal displacement of the walking trolley. A second encoder is fixedly connected to the lifting rope drum for detecting the vertical displacement of the detection mechanism. The computer is signal-connected to the first photoelectric encoder and the second photoelectric encoder to receive and store the displacement data of the first encoder and the second encoder, and calculates the position of the ultrasonic detector 432 by combining the received displacement data with the initial position information of the walking trolley and the lifting rope drum and the initial distance between the ultrasonic detector 432 and the lifting rope drum pre-stored in the computer. The computer 6 is signal-connected to the video acquisition device 41 for receiving and storing the water-cooled wall corrosion image taken by the video acquisition device, and the computer 6 is signal-connected to the ultrasonic detector 432 for receiving and storing the wall thickness data measured by the ultrasonic detector.

[0046] During the inspection, the boiler water-cooled wall thickness detection device is hoisted from the slag outlet at the bottom of the boiler to the top of the inner side of the boiler furnace by a steel wire rope, and the initial positions of the walking trolley and the lifting rope drum and the initial distance between the ultrasonic detector 432 and the lifting rope drum are stored in the computer. The staff operates the controller outside the boiler to control the walking mechanism and the lifting mechanism to drive the detection mechanism to move. After reaching the position to be detected, the operation controller controls the adsorption and fixing device 42 to adsorb on the water-cooled wall, and controls the purge component 431 to purge the slag, and also controls the coupling agent spraying component 43 to spray coupling agent on the position to be detected on the water-cooled wall, and controls the ultrasonic detector 432 to perform ultrasonic detection on the thickness of the water-cooled wall, and controls the video acquisition device 41 to take pictures. After the inspection is completed, the operation controller controls the adsorption and fixing device 42 to release the adsorption, and controls the walking mechanism and the lifting mechanism to drive the detection mechanism to move to the next position to be detected.

[0047] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A boiler water wall thickness detection device, characterized in that: It includes a walking track, a walking mechanism, a lifting mechanism and a detection mechanism. The walking track is used to be fixed on the top of the inner wall of the boiler. The walking mechanism is movably connected to the walking track and can move in the horizontal direction. The lifting mechanism is fixedly connected to the output member of the walking mechanism. The detection mechanism is connected to the output member of the lifting mechanism. The lifting mechanism is used to drive the detection mechanism to rise and fall. The detection mechanism can be adsorbed on the boiler water-cooled wall and detect the thickness of the water-cooled wall.

2. The boiler water wall thickness detection device according to claim 1 is characterized in that: Limiting structures are respectively arranged at both ends of the walking track, and the limiting structures are used to limit the moving range of the walking mechanism on the walking track.

3. The boiler water wall thickness detection device according to claim 1, characterized in that: The walking mechanism includes a walking motor and a walking trolley, the walking motor is fixedly connected to the walking trolley, the walking trolley has a walking wheel group and is movably connected to the walking track through the walking wheel group, the output shaft of the walking motor is connected to the walking wheel group and drives the walking wheel group to rotate; the lifting mechanism includes a lifting motor, a lifting rope and a lifting rope drum, the lifting motor is fixedly connected to the walking trolley, the output shaft of the lifting motor is fixedly connected to the lifting rope drum and can drive the lifting rope drum to rotate, one end of the lifting rope is fixedly connected to the lifting rope drum, and the other end of the lifting rope is fixedly connected to the detection mechanism, and the rotation of the output shaft of the lifting motor can drive the lifting rope on the lifting rope drum to wind or release, thereby causing the detection mechanism to rise or fall in the vertical direction.

4. The boiler water wall thickness detection device according to claim 3 is characterized in that: The detection mechanism comprises a purge detection device, which is used to purge the slag on the water-cooled wall and detect the thickness of the water-cooled wall.

5. The boiler water wall thickness detection device according to claim 4, characterized in that: The detection mechanism also includes a video acquisition device and an adsorption and fixing device. The video acquisition device is connected to the output part of the lifting mechanism, the purge detection device is connected to the video acquisition device, the adsorption and fixing device is connected to the purge detection device, the adsorption and fixing device can be adsorbed on the water-cooled wall, and the video acquisition device is used to photograph the corrosion of the water-cooled wall.

6. The boiler water wall thickness detection device according to claim 5, characterized in that: The purge detection device includes a purge component, an ultrasonic detector, a coupling agent spraying component and a connecting piece, wherein the connecting piece is connected to the video acquisition device, and the purge component, the coupling agent spraying component and the ultrasonic detector are fixedly connected to the connecting piece respectively. The purge component is used to purge the slag on the water-cooled wall, and the coupling agent spraying component is used to spray the coupling agent on the water-cooled wall before the thickness detection to fill the gap between the ultrasonic detector and the boiler water-cooled wall, and the ultrasonic detector is used to perform ultrasonic detection on the thickness of the water-cooled wall.

7. The boiler water wall thickness detection device according to claim 5, characterized in that: The adsorption and fixing device comprises a telescopic cylinder and an adsorption member, wherein the telescopic cylinder is connected to the purge detection device, and the adsorption member is fixedly connected to the end of the telescopic rod of the telescopic cylinder and can be adsorbed on the water-cooled wall.

8. The boiler water wall thickness detection device according to claim 5, characterized in that: The video acquisition device comprises a camera and a lighting fixture, and the camera is connected to the lighting fixture.

9. The boiler water wall thickness detection device according to claim 5, characterized in that: It also includes a controller located outside the boiler, which includes a walking mechanism control module, a lifting mechanism control module, an adsorption and fixing device control module, a purge detection device control module and a video acquisition device control module. The walking mechanism control module is connected to the walking mechanism signal, the lifting mechanism control module is connected to the lifting mechanism signal, the adsorption and fixing device control module is connected to the adsorption and fixing device signal, the purge detection device control module is connected to the purge detection device signal, and the video acquisition device control module is connected to the video acquisition device signal.

10. The boiler water wall thickness detection device according to claim 6, characterized in that: It also includes a computer located outside the boiler. The walking wheel group is also fixedly connected to a first encoder for detecting the horizontal displacement of the walking trolley. The lifting rope drum is also fixedly connected to a second encoder for detecting the vertical displacement of the detection mechanism. The computer is signal-connected to the first encoder and the second encoder for receiving and storing the displacement data of the first encoder and the second encoder. The computer is signal-connected to the video acquisition device for receiving and storing the water-cooled wall corrosion image taken by the video acquisition device. The computer is signal-connected to the ultrasonic detector for receiving and storing the wall thickness data measured by the ultrasonic detector.

Images