Tool and method for detecting crack defect of slit part of coke tank suspender

Abstract

The invention discloses a coke tank suspender slit crack defect detection tool and method, a clamping frame of the tool is arranged on the back of a reflective mirror and clamps the reflective mirror, 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. According to the method, the telescopic rod is extended to a proper length, so that the reflective mirror directly faces the slit part of the hanging rod of the focus tank, and the 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. According to the tool and the method, 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 is solved, fatigue cracks of the slit part of the suspender can be timely checked and found, the suspender is timely repaired before instability, and economic losses caused by major accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, and in particular to a tool and method for detecting crack defects at a slit portion of a coke tank suspension rod. Background Art

[0002] Square coke drums are widely used in iron and steel plants, especially in dry coke quenching systems. Their main function is to receive the hot coke from the coke oven car and transport it to the dry coke quenching oven for cooling. Their working environment is extremely harsh. The material of the square coke drum hoist is mostly high-strength steel such as Q345B, which can withstand the huge weight of the coke drum and coke under high temperature, ensuring the safety and stability of the hoisting process.

[0003] Since the coke tank is repeatedly hoisted and used in a high temperature environment for a long time, fatigue cracks are easily generated in the hangers on both sides of the coke tank. Further expansion of the cracks will lead to failure and breakage of the hangers, causing huge economic losses. The coke tank hanger breaks, causing the coke tank to slide. This in turn causes damage to the coke tank, coke tank trolley, traction and other equipment. Therefore, it is very necessary to grasp the crack defect status of the hangers on both sides of the coke tank.

[0004] Nondestructive testing technology can timely and accurately detect defects in key positions of square coke drum booms and accurately determine the quality and quantity. Based on nondestructive testing technology, magnetic particle testing is widely used by users, but such online coke drum boom flaw detection projects are all carried out on coke drum trolleys. The working conditions are complex. The transverse weld in the lower block area of ​​the boom is in the narrow gap between two steel plates. The weld is about 20mm away from the lower end of the block. There are structural parts around it, which affects the surface pretreatment of the weld. Magnetic particle and penetration inspections cannot be effectively implemented. The detection of surface cracks on the workpiece by the magnetic particle testing method requires that the inspected part can be fully contacted, the magnetic particle machine can be used to completely magnetize it, and the inspection part can be visually observed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a tool and method for detecting crack defects in the slit area of ​​a coke drum hanger rod. The tool and method overcome the defects of the crack defect detection operation in the slit area of ​​a coke drum hanger rod, and solve the problem that the detection results of the slit area of ​​the hanger rod cannot be effectively observed when applying magnetic powder and penetration detection technologies. The fatigue cracks in the slit area of ​​the hanger rod can be inspected and discovered in time, and repaired in time before the hanger rod becomes unstable, thereby avoiding economic losses caused by major accidents.

[0006] In order to solve the above technical problems, the present invention is a tool for detecting crack defects in the slit area of ​​a coke drum boom, comprising 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] A method for detecting crack defects at the slit of a coke drum boom based on the above-mentioned detection tool comprises the following steps: Step 1: According to the height of the slit of the coke tank boom, extend the telescopic rod to an appropriate length and keep it stable so that the reflector is facing the slit of the coke tank boom, so as to make a preliminary overall observation of the narrow space through vision; Step 2: Use the universal joint to adjust the angle of the clamping frame, and then gradually adjust the angle of the reflector. Carefully check the details in the narrow space of the slit of the coke tank boom to find out whether there are cracks in the slit of the coke tank boom. When the reflector uses a concave reflector, coat the mirror surface to improve the 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. 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.

[0010] Furthermore, during the visual inspection process of step one and step two, according to the lighting conditions on site, 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. Since the present invention is used for the crack defect detection tooling at the slit of the coke tank boom, the above technical solution is adopted, that is, the tooling 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 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. The method extends the telescopic rod to an appropriate length so that the reflector is facing the slit of the focus tank boom, so as to make a preliminary overall observation of the narrow space by vision; the angle of the clamping frame is adjusted by the universal joint, and then the angle of the reflector is gradually adjusted to carefully check each detail in the narrow space of the slit of the focus tank boom, so as to find out whether there is a crack in the slit of the coke tank boom; if a crack is found, the boom is repaired regularly, at a shortened or extended period according to the commissioning time and usage status of the coke tank. The tooling and method overcome the defects of crack defect detection work at the slit part of the coke drum boom, and solve the problem that the detection results at the slit part of the boom cannot be effectively observed when applying magnetic powder and penetration detection technology. The fatigue cracks at the slit part of the boom can be inspected and discovered in time, and repaired in time before the boom becomes unstable, thereby avoiding economic losses caused by major accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 The present invention is a schematic diagram of a tooling for detecting crack defects at the slit portion of a coke drum hanger. DETAILED DESCRIPTION

[0012] Implementation example Figure 1 As shown, the tooling for detecting crack defects at the slit portion of a coke drum boom of the present invention comprises 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. The handle 4 is arranged at the bottom end of the telescopic rod 3.

[0013] Preferably, the reflector 1 is a plane mirror or a concave mirror. This tooling selects a high-quality, high-definition reflector, which can be a plane mirror or a concave mirror. The plane mirror reflects an image without distortion and has high definition. The concave mirror reflects an image with a magnifying function, but it will produce certain distortion, but it does not affect the identification of crack defects.

[0014] Preferably, the inspection tool further comprises an LED light board 6 and a light stand 7, wherein the LED light board 6 is arranged in front of the light stand 7, and the light stand 7 is arranged on the top surface of the reflector 1. The LED light board is used to provide auxiliary lighting for the slit of the focus tank suspension rod, so that the reflector can clearly display the cracks that may exist in the slit of the focus tank suspension rod, and then reliably find the existence of the cracks by vision.

[0015] The telescopic rod in this tooling can be freely extended and retracted, and the length can be adjusted as needed. The telescopic rod should remain stable during the extension and contraction process without shaking or loosening, and the material should be lightweight and sturdy aluminum alloy or carbon fiber. The end of the telescopic rod is connected to the clamping frame through a universal joint, and the universal joint can be rotated accordingly according to the operation to adjust the angle and achieve stable support at different heights and angles, so as to perform visual inspection on the slit of the focus tank boom through the reflector to determine whether there is a crack in this part.

[0016] A method for detecting crack defects at the slit of a coke drum boom based on the above-mentioned detection tool comprises the following steps: Step 1: According to the height of the slit of the coke tank boom, extend the telescopic rod to an appropriate length and keep it stable so that the reflector is facing the slit of the coke tank boom, so as to make a preliminary overall observation of the narrow space through vision; at this time, attention should be paid to the layout of the narrow space, the location of obstacles and possible blind spots to avoid missed inspections; 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 check the details in the narrow space of the coke tank boom slit to find out whether there are cracks in the coke tank boom slit. In this process, special attention should be paid to corners or gaps that are difficult to observe directly to ensure the comprehensiveness of the visual inspection; 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 slit of the coke drum boom, and can also provide corresponding crack data for the later boom repair.

[0017] Preferably, during the visual inspection process of step one and step two, according to the lighting conditions on site, 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.

[0018] This method uses pre-made tooling, telescopic and rotating mirrors placed on the slit inspection part, and observes the crack defects of the inspected part by indirect visual inspection under appropriate lighting conditions. Indirect visual inspection is a method of using visual auxiliary equipment to inspect parts or areas that are difficult to directly conduct magnetic particle inspection and direct visual inspection. It can realize non-contact inspection and is suitable for inspection operations in narrow spaces with space restrictions.

[0019] The tool and method adopt non-contact detection, which does not require direct contact with the inspected part of the boom, reduces potential damage to the boom, has the ability to detect early initial crack defects, and is very reliable for cracking risk control. It adapts to the narrow space limitation and effectively solves the problem that the direct detection method cannot be implemented due to space limitation. In the process of online coke tank boom detection, it is not necessary to remove the structural parts and covering parts on both sides of the boom on a large scale to obtain the detection information, avoiding the problem that the cracking condition cannot be detected due to the incontact detection of the slit area. Through the flexible use of telescopic rods and universal joints, the observation angle and distance can be quickly adjusted to improve the detection efficiency. Through high-definition reflectors and appropriate supplementary lighting conditions, the accuracy of the detection results is ensured, and the concave mirror has a certain magnification function, which can detect small cracks, thereby improving the detection accuracy. Due to the convenience of detection of the tool and method, the detection frequency can be increased. Based on short-cycle multi-frequency detection and data recording, the generation of boom cracks and the development of cracking can be accurately predicted. According to the commissioning time and usage status of the coke tank, the interval time of regular, shortened or extended detection is adopted. 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 tank 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 tooling for detecting crack defects at the slit of the coke tank suspension rod according to claim 1 is characterized in that: The reflecting mirror is a plane mirror or a concave mirror.

3. The tooling for detecting crack defects at the slit of the coke tank suspension rod according to claim 1 is characterized in that: 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.

4. A method for detecting crack defects in the slit of a coke drum boom based on the detection tooling according to any one of claims 1 to 3, characterized in that The steps include: Step 1: According to the height of the slit of the coke tank boom, extend the telescopic rod to an appropriate length and keep it stable so that the reflector is facing the slit of the coke tank boom, so as to make a preliminary overall observation of the narrow space through vision; Step 2: Use the universal joint to adjust the angle of the clamping frame, and then gradually adjust the angle of the reflector, and carefully check the details in the narrow space of the coke tank boom slit to find out whether there are cracks in the coke tank boom slit; 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.

5. The method for detecting crack defects at the slit of a coke tank suspension rod according to claim 4 is characterized in that: During the visual inspection process of step one and step two, according to the lighting conditions on site, the LED light panel is turned on to provide supplementary lighting for the slit of the focus tank boom to improve the visual inspection effect.

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