High-temperature environment acoustic emission source simulation device

Abstract

A high-temperature environment acoustic emission source simulation device comprises a cooling transition structure (1), a propelling pencil (2) and a support (3), one end of the propelling pencil (2) is sleeved with the cooling transition structure, and the propelling pencil (2) is obliquely supported and fixedly connected with the support (3); the propelling pencil (2) comprises a pencil lead, the pencil lead (21) is arranged in a pencil lead conveying pipe and located at the middle axis position of the propelling pencil (2), and the pencil lead directly passes through a port of the cooling transition structure (1) through the pencil lead conveying pipe to reach an external high-temperature area. The cooling transition structure (1) comprises a water inlet and a water outlet, and after the propelling pencil (2) is sleeved with the cooling transition structure (1), a cooling water circulation cavity is formed; corresponding acting force is applied to the other end of the pencil lead, the device moves upwards, the pencil lead at the end of the cooling transition structure is promoted to generate lead breaking action, and an acoustic emission signal is generated in a high-temperature area of the structure.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of acoustic nondestructive testing technology, and the device simulates the generation of acoustic emission source by the lead breaking method, realizes the simulation of acoustic emission source signals in complex environments through the innovative design of high-temperature environment structure adaptability. BACKGROUND

[0002] Acoustic emission damage detection technology has been applied in the damage detection and evaluation of structures and materials due to its advantages of online, dynamic detection, strong environmental adaptability, etc. Before acoustic emission detection test, the acoustic emission signals generated by standard acoustic emission sources are usually used for sensor sensitivity calibration and system reliability verification. The lead breaking signal has the characteristics of relatively stable signal frequency range and amplitude, and is simple and easy to operate, so it has been widely used in engineering. With the wide application of acoustic emission technology in engineering, there is a demand for damage detection and monitoring technology in complex environments such as high temperature, strong noise and strong radiation. The lead breaking method used in normal temperature environment cannot meet the demand of standard acoustic emission signal source in special complex environment, and an method or device for generating standard acoustic emission source signals in high temperature environment is urgently needed.

[0003] The "high-temperature acoustic emission source simulation device" proposed in the application belongs to the field of acoustic nondestructive testing technology, which adopts the traditional lead breaking method to simulate the basic principle of acoustic emission source, and combines the water-cooled transition structure suitable for high-temperature environment with the automatic pencil to form a new device, which can realize the simulation of acoustic emission source signals in special complex environments such as high temperature, strong noise and high radiation. SUMMARY

[0004] (I) Technical problems solved

[0005] The application solves the problem of acoustic emission source signal simulation in special complex environments such as high temperature, strong noise and high radiation, and realizes the simulation of acoustic emission source signals in areas inaccessible to personnel in special environments through the innovative design of the new device composed of the water-cooled transition structure suitable for high-temperature environment and the automatic pencil, reduces the harm of high temperature, strong noise and radiation to human body, and improves the efficiency of acoustic emission sensor sensitivity and acoustic emission system reliability verification in special environment scenes.

[0006] (II) Technical solutions

[0007] A high-temperature environment acoustic emission source simulation device, comprising a cooling transition structure (1), a mechanical pencil (2), and a support (3), the mechanical pencil (2) is sleeved into the cooling transition structure at one end, is obliquely supported and is fixedly connected with the support (3); the mechanical pencil (2) comprises a lead core, the lead core (21) is arranged in a lead core conveying pipe and is located at a central axis position of the mechanical pencil (2), and the lead core directly reaches an external high-temperature region through the cooling transition structure (1) port through the lead core conveying pipe; the cooling transition structure (1) comprises a water inlet and a water outlet, and a cooling water circulation cavity is formed after the mechanical pencil (2) is sleeved into the cooling transition structure (1); a corresponding force is applied to the other end of the lead core, the device is moved upwards, the lead core at the end of the cooling transition structure is broken, and an acoustic emission signal is generated in the high-temperature region.

[0008] Further, the mechanical pencil (2) is sleeved into the cooling transition structure at one end, is connected with the support (3) through a clamp and can freely rotate with the clamp.

[0009] Further, the cooling transition structure is made of a high-temperature material.

[0010] Further, the axis of the composite structure of the mechanical pencil (2) body and the cooling transition structure is at an angle of 30°±5° with the surface of the structure to be measured.

[0011] Further, the internal diameter of the lead core conveying pipe is generally 0.5 mm or 0.7 mm and should be consistent with the diameter of the lead core of the mechanical pencil.

[0012] Further, the cooling transition structure (1) is used to load the mechanical pencil body 2 / 3 into the cooling transition structure and ensure stability and reliability.

[0013] Further, the mechanical pencil (2) is fixed to the support through a rubber gasket.

[0014] (Three) beneficial technical effects. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 : high-temperature environment acoustic emission source simulation device;

[0016] Wherein: 1-cooling transition structure; 2-mechanical pencil; 3-support;

[0017] Figure 2 : cooling transition structure; DETAILED DESCRIPTION

[0018] In addition to the embodiments described below, other embodiments or ways of practicing the application are possible. Therefore, it is to be understood that the application is not limited to the particular details described or illustrated in the specification and any drawings. When only one embodiment is introduced herein, the claims are not limited to this embodiment.

[0019] As shown in the drawings, a sound emission source simulation device in high temperature environment comprises a cooling transition structure 1, a mechanical pencil 2, and a support 3. The mechanical pencil 2 comprises a lead core which is located in a lead core conveying pipe and is in the central axis of the mechanical pencil. The lead core enters the lead core conveying pipe of the cooling transition structure by pressing the lead feeding button at the rear end of the mechanical pencil, and the lead core extends out. The cooling transition structure is provided with a water inlet and a water outlet, and the lead core conveying pipe forms a cooling water circulation cavity. The support is a rubber pad which applies corresponding force at the force point to complete the upward movement of the device and to make the lead core at the end of the cooling transition structure break, thereby generating sound emission signals in the high temperature region of the structure. Figure 1

[0020] Firstly, the installation size L of the combined device and the height H of the support are determined according to the positions of the high temperature region and the non-high temperature region to be calibrated.

[0021] Secondly, high temperature materials are selected as the materials of the cooling transition structure according to the temperature of the high temperature environment, and the cooling water flow speed is determined by calculation. The material of the rubber pad at the support is selected according to the H and L determined in the first step, and the deformation amount thereof is calculated to ensure that it can achieve a suitable deformation amount.

[0022] Finally, the cooling transition structure 1 and the used mechanical pencil 2 and the support 3 are combined into a sound emission source signal simulation device. According to the need, corresponding force is applied at the force point to complete the upward movement of the device and to make the lead core at the end of the cooling transition structure break, thereby generating sound emission signals in the high temperature region of the structure.

[0023] Firstly, the installation size L of the combined device and the height H of the support are determined according to the positions of the high temperature region and the non-high temperature region to be calibrated.

[0024] Secondly, high temperature materials are selected as the materials of the cooling transition structure according to the temperature of the high temperature environment, and the cooling water flow speed is determined by calculation. The material of the rubber pad at the support is selected according to the H and L determined in the first step, and the deformation amount thereof is calculated to ensure that it can achieve a suitable deformation amount.

[0025] Finally, the cooling transition structure and the used mechanical pencil and the support are combined into a sound emission source signal simulation device. According to the need, corresponding force is applied at the force point to complete the upward movement of the device and to make the lead core at the end of the cooling transition structure break, thereby generating sound emission signals in the high temperature region of the structure.

[0026] ​The specific implementation method is as follows:

[0027] Determine the installation distance L of the acoustic emission source simulation device based on the location where the acoustic emission source simulation signal is generated and the installation location in a non-high-temperature area.

[0028] According to acoustic emission principles, when a lead breaks, the pen body should form a 30° angle with the structural surface. Figure 1 In the combined structure shown, the support height H can be calculated from L determined in the first step:

[0029]

[0030] Based on the ambient temperature at the acoustic emission source simulation device, appropriate structural materials are selected through calculation, generally high-temperature resistant alloy materials.

[0031] like Figure 2 As shown, L1 and the lead output pipe in the cooling transition structure form a cooling water circulation cavity. It should be ensured that the temperature of the mechanical pencil does not exceed its tolerance level during normal operation; the length of L1 is determined through calculation. Mechanical pencils are made of materials such as plastic, and during operation, the temperature is reduced by the cooling system, and its temperature should be below its heat distortion temperature.

[0032] Selection of the lead delivery tube diameter. The internal diameter of the lead delivery tube should be selected and determined according to the requirements of acoustic emission standards, generally 0.5mm or 0.7mm, and should be consistent with the diameter of the mechanical pencil lead.

[0033] L2 is defined in the cooling transition structure. The length of L2 should allow 2 / 3 of the mechanical pencil body to be inserted into the cooling transition structure, ensuring stability and reliability.

[0034] The diameter D of the cooling transition structure is determined. The inner wall diameter of the cooling transition structure should not be less than the maximum diameter of the mechanical pencil body.

[0035] exist Figure 1 In the assembly, the mechanical pencil is connected to the support via a clamp and can rotate freely between the clamp and the support.

[0036] Requirements for the rubber pad between the mechanical pencil and its base: The rubber pad should have sufficient elasticity to generate a certain amount of compression when compressed, ensuring that both the cooling transition structure and the mechanical pencil will break the lead under stress. Simultaneously, it should also ensure that after the lead-breaking action is complete, the lowest point of the cooling structure does not touch the surface of the structural component.

[0037] By squeezing the lead feed button at the rear of the mechanical pencil, the lead enters the lead delivery tube of the cooling transition structure, with the lead extending 3mm from its lowest point.

[0038] exist Figure 1An upward force is applied to the force application point in the device assembly, causing the cooling transition structure and the mechanical pencil as a whole to rotate around the connection between the clamp and the support, thereby causing the lead to break and completing the stress fluctuation of the acoustic emission source in the structure.

[0039] Operating Procedure: Before the test, the cooling structure is assembled with the mechanical pencil as a single unit, connected to the support via clamps and rubber pads. The lead extension button is pressed, allowing the lead to extend approximately 3mm, ensuring the assembled structure forms a 30° ±5° angle with the surface of the test structure. The water inlet and outlet pipes are connected, and the water flow rate is adjusted to ensure the assembled structure's temperature does not exceed its heat distortion temperature. An upward force is applied to the tail of the mechanical pencil, causing the lead at the front to break off.

[0040] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A high temperature ambient acoustic emission source simulation apparatus, characterized by: The device comprises a cooling transition structure (1), a mechanical pencil (2), and a support (3). The mechanical pencil (2) is inserted into the cooling transition structure at one end and is fixedly connected to the support (3) by a diagonal support. The mechanical pencil (2) comprises a lead core (21) which is located in the central axis of the mechanical pencil (2) and is directly conveyed to the outside high-temperature area through the lead core conveying pipe and the port of the cooling transition structure (1). The cooling transition structure (1) comprises a water inlet and a water outlet. When the mechanical pencil (2) is inserted into the cooling transition structure (1), a cooling water circulation cavity is formed. The other end of the lead core is subjected to a corresponding force to move the device upward, which causes the lead core at the end of the cooling transition structure to break and generate an acoustic emission signal in the high-temperature area.

2. The apparatus of claim 1, wherein: The mechanical pencil (2) is inserted into the cooling transition structure at one end and is connected to the support (3) by a clamp, and can freely rotate with the clamp.

3. The cooling transition structure is made of high-temperature material.

4. The apparatus of claim 1, wherein: The axis of the composite structure of the mechanical pencil (2) and the cooling transition structure forms an angle of 30°±5° with the surface of the structure to be measured.

5. The apparatus of claim 1, wherein: The internal diameter of the lead core conveying pipe is generally 0.5mm or 0.7mm, which is consistent with the diameter of the lead core of the mechanical pencil.

6. The apparatus of claim 1, wherein: The mechanical pencil body is inserted into the cooling transition structure by 2 / 3, and is stable and reliable.

7. The apparatus of claim 1, wherein: The mechanical pencil (2) is fixed to the support by a rubber gasket.

Images