A boiler pressure vessel inner surface crack detection device

Abstract

The utility model relates to the field of boiler pressure vessel detection technology discloses a kind of boiler pressure vessel inner surface crack detection device, including lifting support platform and container, the lifting support platform is equipped with adaptive fixed mechanism and detection mechanism, the adaptive fixed mechanism includes double-shaft motor, fixed seat is connected and arranged on the double-shaft motor, by lifting support platform, double-shaft motor is adjusted to container center, and the quick connection of motor output end and screw No. 1 is realized using clamping groove and clamping block. After starting, the extrusion rod is moved along the limiting sliding slot driven by screw rod, and the force block and connecting rod are pushed, so that the fixed clamping plate clamps the outer wall of container. The structure can adapt to containers of different sizes, realize quick and stable fixation, improve the applicability and detection stability of the device, reduce equipment cost and management difficulty, and effectively improve detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of boiler and pressure vessel testing technology, specifically, it relates to a device for detecting cracks on the inner surface of a boiler and pressure vessel. Background Technology

[0002] As key pressure-bearing equipment in industrial production, boilers and pressure vessels are subjected to high temperature, high pressure and media corrosion on their inner walls for a long time, which can easily lead to fatigue cracks. If these cracks are not detected in time, they may cause equipment leakage or even explosion, resulting in safety accidents.

[0003] However, existing testing devices often have fixed dimensions or very limited adjustment ranges due to the size of their support or propulsion structures (such as traveling trolleys, support arms, etc.). This means that a single testing device is typically only suitable for containers of a specific diameter or size range. When testing containers of different diameters or specifications is required, multiple testing devices of different sizes must be replaced or configured, which not only increases equipment costs and management complexity but also reduces testing efficiency.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To address the aforementioned technical problems, the basic concept of this utility model is as follows: However, existing testing devices often have fixed dimensions or very limited adjustment ranges due to the fixed dimensions of their support or propulsion structures (such as traveling trolleys, support arms, etc.). This results in a single testing device typically only being applicable to containers of a specific diameter or size range. When testing containers of different diameters or specifications is required, multiple testing devices of different sizes must be replaced or configured, which not only increases equipment costs and management difficulty but also reduces testing efficiency.

[0006] A device for detecting cracks on the inner surface of a boiler pressure vessel includes a lifting support platform and a vessel, wherein an adapter fixing mechanism and a detection mechanism are installed on the lifting support platform.

[0007] The adapter fixing mechanism includes a dual-axis motor, a fixing seat is connected to the dual-axis motor, and a fixing clamp is connected to the fixing seat. The fixing clamp is used to clamp and fix the container.

[0008] The detection mechanism includes a lead screw 2 connected to the output end of a dual-axis motor. The lead screw 2 is provided with a connecting sleeve and a nozzle, and the nozzle is used to spray magnetic powder.

[0009] In a preferred embodiment of this utility model, the adapter fixing mechanism includes a slot opened on one output end of the dual-axis motor, a locking block is engaged on the inner wall of the slot, a lever is rotatably mounted on the outer wall of the locking block, a fixing seat is connected to the outer wall of one side of the dual-axis motor, a lead screw is rotatably mounted on the fixing seat, and a pressing rod is threadedly connected to the outer wall of the lead screw.

[0010] In a preferred embodiment of this utility model, the detection mechanism includes a limiting sleeve connected to the outer wall of one side of the dual-axis motor, a threaded block threadedly connected to the outer wall of the lead screw, one end of the outer wall of the threaded block being connected to the inner outer wall of the connecting sleeve, the nozzle being connected to the outer wall of the connecting sleeve, and a camera being connected to the outer wall of one end of the connecting sleeve.

[0011] In a preferred embodiment of this utility model, a sliding groove is provided on the fixed base, and a force-bearing block is slidably connected to the inner wall of the sliding groove. A limiting sliding groove is provided on the outer wall of the force-bearing block away from the sliding groove. The inner wall of the limiting sliding groove is movably connected to the outer wall of one end of the extrusion rod. A connecting rod is connected to the outer wall of the force-bearing block, and the end of the connecting rod away from the force-bearing block is rotatably connected to the fixed clamping plate.

[0012] In a preferred embodiment of this utility model, the outer wall of the connecting sleeve is provided with a connecting pipe.

[0013] In a preferred embodiment of this utility model, one side of the outer wall of the force-bearing block is provided as an inclined surface, and the limiting groove is provided on the force-bearing block along the inclined surface.

[0014] In a preferred embodiment of this utility model, there are two fixing plates, which are symmetrically distributed on the left and right sides of the dual-axis motor.

[0015] In a preferred embodiment of this utility model, the outer wall of the connecting sleeve is provided with a movable groove, and the outer wall of the threaded block is movably disposed on the inner wall of the movable groove.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention uses a lifting support platform to adjust a dual-axis motor to the center of the container, and utilizes slots and blocks to achieve a quick connection between the motor output and the lead screw. Upon startup, the lead screw drives the extrusion rod to move along the limiting slide groove, pushing the force-bearing block and connecting rod, causing the fixing clamp to tighten onto the outer wall of the container. This structure can adapt to containers of different sizes, achieving rapid and stable fixing, improving the applicability and testing stability of the device, while reducing equipment costs and management difficulty, effectively improving testing efficiency.

[0018] This invention, by disconnecting the first lead screw and activating the other output end of the dual-axis motor, drives the second lead screw to rotate, causing the threaded block to move horizontally along the movable groove of the connecting sleeve. This, in turn, causes the connecting sleeve and the nozzle to move horizontally synchronously. Opening the nozzle allows for the uniform spraying of magnetic powder onto the inner wall of the container. After magnetization, a camera is used to observe whether the magnetic powder aggregates, thus determining the location of cracks. This structure achieves stable nozzle movement and uniform spraying, effectively improving the coverage uniformity and defect identification accuracy of magnetic powder detection.

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a top-view structural diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the fixing mechanism adapted to this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the adapter fixing mechanism of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the testing mechanism of this utility model.

[0026] In the diagram: 1. Lifting support platform; 2. Container; 31. Adaptive fixing mechanism; 311. Dual-axis motor; 312. Slot; 313. Block; 314. Lever; 315. Lead screw one; 316. Extrusion rod; 317. Fixing seat; 318. Force-bearing block; 319. Limiting slide; 3110. Connecting rod; 3111. Fixing clamp; 32. Detection mechanism; 321. Lead screw two; 322. Limiting sleeve; 323. Threaded block; 324. Connecting sleeve; 325. Nozzle; 326. Camera; 327. Connecting pipe. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0028] like Figures 1 to 5As shown, a device for detecting cracks on the inner surface of a boiler pressure vessel includes a lifting support platform 1 and a vessel 2. An adapter fixing mechanism 31 and a detection mechanism 32 are installed on the lifting support platform 1. The adapter fixing mechanism 31 includes a dual-axis motor 311, a fixed seat 317 connected to the dual-axis motor 311, and a fixed clamping plate 3111 connected to the fixed seat 317. The fixed clamping plate 3111 is used to clamp and fix the vessel 2. The detection mechanism 32 includes a lead screw connected to the output end of the dual-axis motor 311 on one side. The second screw 321 is provided with a connecting sleeve 324 and a nozzle 325. The nozzle 325 is used to spray magnetic powder. The adapter fixing mechanism 31 includes a slot 312 opened on one output end of the dual-axis motor 311. A locking block 313 is locked on the inner wall of the slot 312. A lever 314 is rotatably provided on the outer wall of the locking block 313. A fixing seat 317 is connected to the outer wall of one side of the dual-axis motor 311. A first screw 315 is rotatably provided on the fixing seat 317. A pressing rod 316 is threadedly connected to the outer wall of the first screw 315.

[0029] Furthermore, a sliding groove is provided on the fixed base 317, and a force-bearing block 318 is slidably connected to the inner wall of the sliding groove. A limiting groove 319 is provided on the outer wall of the force-bearing block 318 away from the sliding groove. The inner wall of the limiting groove 319 is movably connected to the outer wall of one end of the pressing rod 316. A connecting rod 3110 is connected to the outer wall of the force-bearing block 318. The end of the connecting rod 3110 away from the force-bearing block 318 is rotatably connected to the fixed clamping plate 3111.

[0030] Furthermore, a connecting pipe 327 is provided on the outer wall of the connecting sleeve 324, through which a magnetic powder storage box can be connected, so that the nozzle 325 can continuously spray magnetic powder.

[0031] Furthermore, one side of the outer wall of the force-bearing block 318 is provided with an inclined surface, and the limiting groove 319 is provided on the force-bearing block 318 along the inclined surface. There are two fixing plates 3111, which are symmetrically distributed on the left and right sides of the dual-axis motor 311. The inclined surface allows the force-bearing block 318 to be squeezed, thereby generating displacement and driving the fixing plates 3111 on both sides to move and clamp and fix.

[0032] The detection mechanism 32 includes a limiting sleeve 322 connected to the outer wall of one side of the dual-axis motor 311, a threaded block 323 threadedly connected to the outer wall of the lead screw 321, one end of the outer wall of the threaded block 323 being connected to the inner outer wall of the connecting sleeve 324, a nozzle 325 being connected to the outer wall of the connecting sleeve 324, and a camera 326 being connected to the outer wall of one end of the connecting sleeve 324.

[0033] Furthermore, the outer wall of the connecting sleeve 324 is provided with a movable groove, and the outer wall of the threaded block 323 is movably disposed on the inner wall of the movable groove. The movable groove can limit the threaded block 323, so that the threaded block 323 can move horizontally.

[0034] The implementation principle of the boiler pressure vessel inner surface crack detection device in this embodiment is as follows: During detection, the entire device is first moved to one end opening of the container 2. Then, the position of the dual-axis motor 311 is adjusted to the center position of the container 2 by controlling the lifting support platform 1. Then, the lever 314 can be moved, causing the lever 314 to drive the locking block 313 to move and insert into the inner wall of the locking groove 312, so that one output end of the dual-axis motor 311 is connected to the lead screw 315. Then, the dual-axis motor 311 is started, and the output end connected to one side can drive the lead screw 315 to rotate. As the lead screw 315 rotates, it can drive the pressing rod 316 with threads on its outer wall to move towards the side closer to the dual-axis motor 311. At this time, the outer wall of one end of the extrusion rod 316 is in the limiting slide groove 319, so it can be limited by the limiting slide groove 319. In this way, the extrusion rod 316 will exert an extrusion force on the force block 318 during the movement. The force block 318 under extrusion can move closer to the center position. As the force block 318 moves, it can simultaneously drive the connecting rod 3110 on one side of the outer wall and the fixed clamping plate 3111 to move until the outer wall of one side of the fixed clamping plate 3111 is attached and clamped to the outer wall of the container 2, thereby adapting and fixing the whole device to ensure the stability during the detection process. This can adapt to containers 2 of different sizes, improve the applicability of the device, reduce equipment costs and management difficulty, and improve detection efficiency.

[0035] After the adjustment and fixing are completed, the lever 314 can be reset and moved so that the lever 314 drives the locking block 313 to disengage from the inner wall of the locking slot 312, thereby disconnecting the lead screw 315 from the output end of the dual-axis motor 311.

[0036] After disconnecting the lead screw 315 on one side, the dual-axis motor 311 can be restarted. The output end of the other end will drive the lead screw 321 to rotate. As the lead screw 321 rotates, the threaded block 323 will move horizontally along the movable groove on the outer wall of the connecting sleeve 324. As the threaded block 323 moves, the connecting sleeve 324 and the nozzle 325 will move synchronously. At this time, the nozzle 325 can be turned on to uniformly spray magnetic powder onto the inner surface of the container 2. After the spraying is completed, the container 2 can be magnetized. Then, the camera 326 can be used to observe whether there is any accumulation of magnetic powder. If there is, it means that there is a crack at the location of the accumulated magnetic powder; otherwise, there is no crack. By driving the connecting sleeve 324 and the nozzle 325 to move horizontally, the inside of the container 2 can be uniformly sprayed, thereby providing the accuracy of the detection.

Claims

1. A device for detecting cracks on the inner surface of a boiler pressure vessel, comprising a lifting support platform (1) and a vessel (2), characterized in that, The lifting support platform (1) is equipped with an adapter fixing mechanism (31) and a detection mechanism (32). The adapter fixing mechanism (31) includes a dual-axis motor (311), a fixing seat (317) is connected to the dual-axis motor (311), and a fixing clamp (3111) is connected to the fixing seat (317). The fixing clamp (3111) is used to clamp and fix the container (2). The detection mechanism (32) includes a lead screw (321) connected to the output end of a dual-axis motor (311) on one side. The lead screw (321) is provided with a connecting sleeve (324) and a nozzle (325), and the nozzle (325) is used to spray magnetic powder.

2. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 1, characterized in that, The adapter fixing mechanism (31) includes a slot (312) opened on one output end of the dual-axis motor (311), a locking block (313) is provided on the inner wall of the slot (312), a lever (314) is rotatably provided on the outer wall of the locking block (313), a fixing seat (317) is connected to the outer wall of one side of the dual-axis motor (311), a lead screw (315) is rotatably provided on the fixing seat (317), and a pressing rod (316) is threadedly connected to the outer wall of the lead screw (315).

3. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 1, characterized in that, The detection mechanism (32) includes a limiting sleeve (322) connected to the outer wall of one side of the dual-axis motor (311), a threaded block (323) threadedly connected to the outer wall of the lead screw (321), one end of the outer wall of the threaded block (323) being connected to the inner outer wall of the connecting sleeve (324), the nozzle (325) being connected to the outer wall of the connecting sleeve (324), and a camera (326) being connected to the outer wall of one end of the connecting sleeve (324).

4. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 1, characterized in that, The fixed base (317) is provided with a sliding groove, and a force-bearing block (318) is slidably connected to the inner wall of the sliding groove. A limiting groove (319) is provided on the outer wall of the force-bearing block (318) away from the sliding groove. The inner wall of the limiting groove (319) is movably connected to the outer wall of one end of the extrusion rod (316). A connecting rod (3110) is connected to the outer wall of the force-bearing block (318). The end of the connecting rod (3110) away from the force-bearing block (318) is rotatably connected to the fixed clamp (3111).

5. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 1, characterized in that, The outer wall of the connecting sleeve (324) is connected to a connecting pipe (327).

6. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 4, characterized in that, The outer wall of one side of the force-bearing block (318) is provided as an inclined surface, and the limiting groove (319) is provided on the force-bearing block (318) along the inclined surface.

7. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 2, characterized in that, There are two fixing plates (3111), which are symmetrically distributed on the left and right sides of the dual-axis motor (311).

8. The device for detecting cracks on the inner surface of a boiler pressure vessel according to claim 3, characterized in that, The outer wall of the connecting sleeve (324) is provided with a movable groove, and the outer wall of the threaded block (323) is movably disposed on the inner wall of the movable groove.

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