Tool for detecting crack defect at slit part of coke tank suspender

Abstract

The utility model discloses a coke pot suspender slit crack defect detection tool, a clamping frame of the tool is arranged on the back surface of a reflector and clamps the reflector, the top end of a telescopic rod is connected with the bottom surface of the clamping frame through a universal joint, and a handle is arranged at the bottom end of the telescopic rod. When the tool is used, the telescopic rod is extended to a proper length, so that the reflective mirror directly faces a slit part of a hanging rod of the focus tank, and a narrow space can be preliminarily and integrally observed through vision; the angle of the clamping frame is adjusted by the universal joint, so that the angle of the reflecting mirror is gradually adjusted to find whether cracks exist at the slit part of the coke tank suspender; and if cracks are found, repairing the suspender by regularly shortening or prolonging the period according to the use time and the use condition of the coke tank. The tool solves the problem that the detection result cannot be effectively observed when the magnetic powder and penetration detection technology is applied to the slit part of the suspender, fatigue cracks of the slit part of the suspender can be checked and found in time, the suspender is repaired in time before instability, and economic losses caused by major accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of non-destructive testing, in particular to a tool for detecting crack defects at the slit of a coke tank boom. Background Art

[0002] Square coke drums are widely used in ironworks, particularly in dry coke quenching systems. Their primary function is to receive hot coke from coke oven cars and transport it to the dry coke ovens for cooling. This operating environment is extremely harsh. The square coke drum booms are typically made of high-strength steel, such as Q345B, capable of withstanding the immense weight of the drum and coke at high temperatures, ensuring safety and stability during the hoisting process.

[0003] Due to the long-term, repeated lifting and use of coke drums in high-temperature environments, fatigue cracks easily develop in the booms on both sides of the drum. Further crack expansion can lead to boom failure and fracture, resulting in significant economic losses. A broken boom can cause the drum to slip, further damaging the drum, drum trolley, and traction equipment. Therefore, it is crucial to understand the crack defects in the booms on both sides of the drum.

[0004] Nondestructive testing technology can promptly and accurately detect defects in key locations of square coke drum booms, providing both qualitative and quantitative analysis. Magnetic particle testing, based on this nondestructive testing technology, is widely adopted by users. However, these online coke drum boom flaw detection projects are all performed on coke drum trolleys, which present complex working conditions. The transverse weld in the boom's lower block area is located in a narrow gap between two steel plates, approximately 20 mm from the lower end of the block. Surrounding structural components obstruct the weld surface, hindering surface pretreatment and making magnetic particle and penetrant inspections ineffective. Magnetic particle testing, for detecting surface cracks in a workpiece, requires full contact with the inspected area, complete magnetization with a magnetic particle machine, and visual observation of the inspected area. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a tool for detecting crack defects in the slit part of the coke drum boom. The tool overcomes the defects of the crack defect detection operation in the slit part of the coke drum boom, solves the problem that the detection results of the slit part of the boom cannot be effectively observed when applying magnetic powder and penetration detection technology. The tool can timely inspect and discover fatigue cracks in the slit part of the boom, and repair them in time before the boom becomes unstable, thereby avoiding economic losses caused by major accidents.

[0006] In order to solve the above technical problems, the utility model is a tool for detecting crack defects in the slit area of ​​a coke drum boom, which includes a reflector, a clamping frame, a telescopic rod and a handle. The clamping frame is arranged on the back of the reflector and clamps the reflector. The top end of the telescopic rod is connected to the bottom surface of the clamping frame through a universal joint, and the handle is arranged at the bottom end of the telescopic rod.

[0007] Furthermore, the reflecting mirror is a plane mirror or a concave mirror.

[0008] Furthermore, the detection tool also includes an LED light board and a light stand, wherein the LED light board is arranged in front of the light stand, and the light stand is arranged on the top surface of the reflector.

[0009] The method for detecting crack defects in the slit of the coke drum boom using this tool includes the following steps:

[0010] Step 1: Extend the telescopic rod to an appropriate length according to the height of the slit of the coke tank boom and keep it stable so that the reflector is facing the slit of the coke tank boom, so as to make a preliminary overall visual observation of the narrow space;

[0011] Step 2: Use the universal joint to adjust the angle of the clamping frame, and then gradually adjust the angle of the reflector. Carefully inspect every detail in the narrow space of the coke tank boom slit to detect whether there are any cracks in the slit of the coke tank boom. When using a concave reflector, apply a coating on the mirror surface to improve its reflective performance and wear resistance. The concave reflector has the function of magnifying the image. If necessary, use a high-resolution camera with a telephoto lens to capture the image on the reflector.

[0012] Step 3: If cracks are found, the boom should be repaired regularly, at a shortened or extended period, depending on the commissioning time and usage conditions of the coke drum.

[0013] Furthermore, during the visual inspection process of step one and step two, according to the on-site lighting conditions, the LED light panel is turned on to provide supplementary lighting for the slit area of ​​the focus tank boom to improve the visual inspection effect.

[0014] Since the utility model is used for the crack defect detection tool at the slit of the coke tank boom, the above-mentioned technical solution is adopted, that is, the tool comprises a reflector, a clamping frame, a telescopic rod and a handle. The clamping frame is arranged on the back of the reflector and clamps the reflector. The top of the telescopic rod is connected to the bottom surface of the clamping frame through a universal joint, and the handle is arranged at the bottom of the telescopic rod. When the tool is used, the telescopic rod is extended to an appropriate length so that the reflector is facing the slit of the coke tank boom, so as to make a preliminary overall visual observation of the narrow space; the angle of the clamping frame is adjusted by the universal joint, and then the angle of the reflector is gradually adjusted to carefully inspect each detail in the narrow space of the slit of the coke tank boom, so as to detect whether there are cracks in the slit of the coke tank boom; if cracks are found, the boom is repaired regularly, at a shortened or extended period according to the commissioning time and usage status of the coke tank. This tooling overcomes the defects of crack defect detection in the slit area of ​​the coke drum boom, and solves the problem that the detection results of the slit area of ​​the boom cannot be effectively observed when applying magnetic powder and penetration testing technologies. It can timely inspect and discover fatigue cracks in the slit area of ​​the boom, and repair them in time before the boom becomes unstable, avoiding economic losses caused by major accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 The utility model is a schematic diagram of a tool for detecting crack defects in the slit area of ​​a coke drum boom. DETAILED DESCRIPTION

[0017] Implementation example Figure 1 As shown, the utility model is used for the crack defect detection tooling at the slit part of the coke drum boom, which includes a reflector 1, a clamping frame 2, a telescopic rod 3 and a handle 4. The clamping frame 2 is arranged on the back of the reflector 1 and clamps the reflector 1. The top end of the telescopic rod 3 is connected to the bottom surface of the clamping frame 2 through a universal joint 5, and the handle 4 is arranged at the bottom end of the telescopic rod 3.

[0018] Preferably, the reflector 1 is a plane mirror or a concave mirror. This tool selects a high-quality, high-definition reflector, which can be a plane mirror or a concave mirror. The plane mirror reflects the image without distortion and has high clarity. The concave mirror reflects the image with a magnifying function, but it will produce a certain degree of distortion, but it does not affect the identification of crack defects.

[0019] Preferably, the inspection tool further includes an LED light board 6 and a light stand 7, wherein the LED light board 6 is provided in front of the light stand 7, and the light stand 7 is provided on the top surface of the reflector 1. The LED light board is used to provide auxiliary lighting for the slit of the coke tank boom, so that the reflector can clearly display the possible cracks in the slit of the coke tank boom, thereby reliably detecting the presence of cracks through visual inspection.

[0020] The telescopic rod in this tooling can be freely extended and retracted, and its length can be adjusted as needed. The rod should remain stable during extension and retraction, without shaking or loosening. It is made of lightweight, sturdy aluminum alloy or carbon fiber. The end of the rod is connected to the clamping frame via a universal joint. The universal joint rotates according to the operation, adjusting the angle and achieving stable support at different heights and angles. A reflector is then used to visually inspect the narrow gap in the focus tank boom to determine whether it is cracked.

[0021] The method for detecting crack defects in the slit of the coke drum boom using this detection tool includes the following steps:

[0022] Step 1: Extend the telescopic rod to an appropriate length according to the height of the slit of the coke tank boom and keep it stable so that the reflector is facing the slit of the coke tank boom, so as to conduct a preliminary overall visual observation of the narrow space. At this time, pay attention to the layout of the narrow space, the location of obstacles, and possible blind spots to avoid missing inspections.

[0023] Step 2: Use the universal joint to adjust the angle of the clamping frame, and then gradually adjust the angle of the reflector to carefully inspect every detail in the narrow space of the coke tank boom to detect whether there are any cracks in the narrow space. During this process, pay special attention to corners or gaps that are difficult to directly observe to ensure a comprehensive visual inspection.

[0024] Step 3: If cracks are found, the boom should be repaired regularly, at a shortened or extended period, depending on the commissioning time and usage of the coke drum. Any cracks or abnormal conditions found should be carefully observed and recorded. This can provide a basis for confirming the cracks by other methods after removing the obstructions at the narrow slit of the coke drum boom, and can also provide corresponding crack data for the subsequent boom repair.

[0025] Preferably, during the visual inspection process of step one and step two, the LED light panel is turned on to provide supplementary lighting for the slit portion of the focus tank boom according to the on-site lighting conditions, thereby improving the visual inspection effect.

[0026] This method utilizes a prefabricated fixture with a telescopic and rotating mirror positioned within the slit to be inspected. Under appropriate lighting conditions, indirect visual inspection is used to observe crack defects within the inspected area. Indirect visual inspection utilizes visual aids to inspect areas or regions that are difficult to inspect directly with magnetic particle testing or direct visual inspection. This method enables non-contact testing and is suitable for inspections in confined spaces.

[0027] This tool and method utilize non-contact inspection, eliminating the need for direct contact with the boom's inspected area, reducing potential damage to the boom. It can detect early crack initiation defects and provides reliable control of cracking risks. It adapts to confined spaces, effectively resolving the issue of direct inspection methods being unable to implement due to space limitations. During online coke drum boom inspection, inspection information can be obtained without extensive removal of structural components and covers on either side of the boom, thus avoiding the issue of inaccessible inspection areas and the inability to detect cracks. The flexible use of telescopic rods and universal joints allows for quick adjustment of observation angle and distance, improving inspection efficiency. High-definition reflectors and appropriate supplemental lighting ensure the accuracy of inspection results, while the concave mirror's magnification allows for the detection of fine cracks, thereby enhancing inspection accuracy. The convenience of this tool and method allows for increased inspection frequency. Based on short-term, multi-frequency inspections and data recording, accurate predictions of boom crack initiation and development can be made. Inspection intervals can also be adjusted regularly, shortened, or extended based on the drum's operational age and usage. Compared with traditional detection methods, this tooling and method can reduce detection costs, does not require flaw detection equipment and flaw detection agents, and has higher economic benefits.

Claims

1. A tool for detecting crack defects in the slit of a coke drum boom, characterized by: The utility model comprises a reflector, a clamping frame, a telescopic rod and a handle. The clamping frame is arranged on the back of the reflector and clamps the reflector. The top end of the telescopic rod is connected to the bottom surface of the clamping frame through a universal joint. The handle is arranged at the bottom end of the telescopic rod.

2. The tool for detecting crack defects in the slit of a coke drum boom according to claim 1 is characterized in that: The reflecting mirror is a plane mirror or a concave mirror.

3. The tool for detecting crack defects in the slit of a coke drum boom according to claim 1 is characterized in that: This detection tool also includes an LED light board and a light stand. The LED light board is arranged in front of the light stand, and the light stand is arranged on the top surface of the reflector.

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