Furnace tube status detection method, device and equipment

Abstract

The embodiment of the present application provides a method, device and equipment for detecting the state of a furnace tube, the method comprising: obtaining the magnetic strength of the furnace tube; determining the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength; determining the state of the furnace tube according to the thickness of the carbon permeation layer, the state of the furnace tube being a weldable state or a non-weldable state, thereby improving the accuracy of furnace tube state detection.

Description

Technical Field

[0001] The present application relates to the field of chemical technology, and in particular to a method, device and equipment for detecting a furnace tube state. Background Art

[0002] When the furnace tubes of the cracking furnace are being inspected and repaired, the staff can replace the non-weldable furnace tubes to avoid damage to the furnace tubes and affect production safety.

[0003] At present, the staff can replace the furnace tubes according to their service life. For example, during maintenance, the staff can replace the furnace tubes that have been used for 6-8 years. However, due to the different environments in the cracking furnace, the degree of damage to the furnace tubes is also different. Therefore, the service life of the furnace tubes cannot accurately reflect the status of the furnace tubes (the service life of the furnace tubes with lower temperatures in the cracking furnace can exceed 8 years), which leads to low accuracy in detecting the status of the furnace tubes. Summary of the invention

[0004] The present application provides a method, device and equipment for detecting the state of a furnace tube, which are used to solve the technical problem of low accuracy in detecting the state of the furnace tube in the prior art.

[0005] In a first aspect, the present application provides a method for detecting a furnace tube state, the method comprising:

[0006] Obtaining the magnetic strength of the furnace tube;

[0007] Determining the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength;

[0008] The state of the furnace tube is determined according to the thickness of the carbon permeation layer, and the state of the furnace tube is a weldable state or a non-weldable state.

[0009] In a possible implementation manner, determining the state of the furnace tube according to the thickness of the carbon permeation layer includes:

[0010] Determining the carburization degree of the furnace tube according to the thickness of the carbon permeation layer, wherein the carburization degree is used to indicate the penetration degree of carbon atoms into the tube wall of the furnace tube;

[0011] The state of the furnace tube is determined according to the carburizing degree.

[0012] In a possible implementation manner, determining the state of the furnace tube according to the carburizing degree includes:

[0013] Obtaining the material of the furnace tube;

[0014] Determining the critical value of the carburizing degree according to the material of the furnace tube;

[0015] The state of the furnace tube is determined according to the carburizing degree and the critical value.

[0016] In a possible implementation manner, determining the state of the furnace tube according to the carburizing degree and the critical value includes:

[0017] When the carburizing degree is greater than or equal to the critical value, determining that the furnace tube is in a non-weldable state;

[0018] When the carburizing degree is less than the critical value, it is determined that the state of the furnace tube is a weldable state.

[0019] In a possible implementation manner, determining the carburization degree of the furnace tube according to the thickness of the carbon permeation layer includes:

[0020] Obtaining the wall thickness of the furnace tube;

[0021] The carburizing degree is determined according to the wall thickness of the furnace tube and the thickness of the carbon permeation layer.

[0022] In a possible implementation manner, determining the carburization degree of the furnace tube according to the wall thickness of the furnace tube and the thickness of the carbon penetration layer includes:

[0023] The ratio of the thickness of the carbon permeation layer to the wall thickness of the furnace tube is determined as the carburization degree.

[0024] In a possible implementation manner, determining the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength includes:

[0025] Acquire a first preset relationship between the magnetic intensity and the thickness of the carbon permeation layer, wherein the first preset relationship includes at least one magnetic intensity and the thickness of the carbon permeation layer corresponding to each magnetic intensity;

[0026] The thickness of the carbon permeation layer of the furnace tube is determined according to the magnetic strength and the first preset relationship.

[0027] In a second aspect, an embodiment of the present application provides a device for detecting a furnace tube state, the device for detecting a furnace tube state comprising an acquisition module, a first determination module, and a second determination module, wherein:

[0028] The acquisition module is used to acquire the magnetic strength of the furnace tube;

[0029] The first determination module is used to determine the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength;

[0030] The second determination module is used to determine the state of the furnace tube according to the thickness of the carbon permeation layer, and the state of the furnace tube is a weldable state or a non-weldable state.

[0031] In a possible implementation manner, the second determining module is specifically configured to:

[0032] Determining the carburization degree of the furnace tube according to the thickness of the carbon permeation layer, wherein the carburization degree is used to indicate the penetration degree of carbon atoms into the tube wall of the furnace tube;

[0033] The state of the furnace tube is determined according to the carburizing degree.

[0034] In a possible implementation manner, the second determining module is specifically configured to:

[0035] Obtaining the material of the furnace tube;

[0036] Determining the critical value of the carburizing degree according to the material of the furnace tube;

[0037] The state of the furnace tube is determined according to the carburizing degree and the critical value.

[0038] In a possible implementation manner, the second determining module is specifically configured to:

[0039] When the carburizing degree is greater than or equal to the critical value, determining that the furnace tube is in a non-weldable state;

[0040] When the carburizing degree is less than the critical value, it is determined that the state of the furnace tube is a weldable state.

[0041] In a possible implementation manner, the second determining module is specifically configured to:

[0042] Obtaining the wall thickness of the furnace tube;

[0043] The carburizing degree is determined according to the wall thickness of the furnace tube and the thickness of the carbon permeation layer.

[0044] In a possible implementation manner, the second determining module is specifically configured to:

[0045] The ratio of the thickness of the carbon permeation layer to the wall thickness of the furnace tube is determined as the carburization degree.

[0046] In a possible implementation manner, the first determining module is specifically configured to:

[0047] Acquire a first preset relationship between the magnetic intensity and the thickness of the carbon permeation layer, wherein the first preset relationship includes at least one magnetic intensity and the thickness of the carbon permeation layer corresponding to each magnetic intensity;

[0048] The thickness of the carbon permeation layer of the furnace tube is determined according to the magnetic strength and the first preset relationship.

[0049] In a third aspect, an embodiment of the present application provides a furnace tube state detection device, including: a processor, a memory;

[0050] The memory stores computer-executable instructions;

[0051] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method for detecting the furnace tube status as described in any one of the first aspects.

[0052] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer execution instructions, which, when executed by a processor, are used to implement the furnace tube status detection method described in any one of the first aspects.

[0053] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the method for detecting the furnace tube status as described in any one of the above items are implemented.

[0054] The present application provides a method, device and equipment for detecting the state of a furnace tube, obtaining the magnetic strength of the furnace tube, determining the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength, and determining the state of the furnace tube according to the thickness of the carbon permeation layer, wherein the state of the furnace tube is a weldable state or a non-weldable state. According to the above method, the thickness of the carbon permeation layer can be accurately determined according to the magnetic strength of the furnace tube, and the state of the furnace tube can be accurately determined in combination with the carbon permeation layer in the furnace tube, thereby improving the detection accuracy of the furnace tube state. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic diagram of an application scenario provided for an embodiment of the present application;

[0056] Figure 2 A schematic flow chart of a furnace tube status detection method provided in an embodiment of the present application;

[0057] Figure 3 A schematic flow chart of another furnace tube status detection method provided in an embodiment of the present application;

[0058] Figure 4 A schematic diagram of a process of a furnace tube status detection method provided in an embodiment of the present application;

[0059] Figure 5 A schematic diagram of the structure of a furnace tube status detection device provided in an embodiment of the present application;

[0060] Figure 6 A schematic diagram of the hardware structure of the furnace tube status detection device provided in this application. DETAILED DESCRIPTION

[0061] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0062] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0063] In the related art, the staff can replace the furnace tubes according to the service life of the furnace tubes of the cracking furnace. For example, when the staff is overhauling the cracking furnace, the furnace tubes that have been used for 6-8 years can be replaced. However, due to the different environments in the cracking furnace, the degree of damage to the furnace tubes is also different. Therefore, the service life of the furnace tubes cannot accurately reflect the status of the furnace tubes. For example, the service life of the furnace tubes with higher temperatures in the cracking furnace is less than 6 years, and the service life of the furnace tubes with lower temperatures in the cracking furnace is more than 8 years. This leads to a low accuracy in detecting the status of the furnace tubes.

[0064] In order to solve the technical problem of low accuracy in detecting the state of the furnace tube in the related art, the embodiment of the present application provides a method for detecting the state of the furnace tube, obtains the magnetic strength of the furnace tube, determines the thickness of the carbon penetration layer of the furnace tube according to the magnetic strength, and determines the penetration degree of the furnace tube according to the wall thickness of the furnace tube and the thickness of the carbon penetration layer of the furnace tube, and the penetration degree is used to indicate the penetration degree of carbon atoms in the tube wall of the furnace tube. When the penetration degree is greater than or equal to the critical value, the state of the furnace tube is determined to be a non-weldable state, and when the penetration degree is less than the critical value, the state of the furnace tube is determined to be a weldable state. In this way, the state of the furnace tube can be accurately determined in combination with the penetration degree of carbon atoms in the tube wall of the furnace tube, thereby improving the accuracy of detecting the state of the furnace tube.

[0065] Next, combine Figure 1 , describe in detail the application scenarios to which this application is applicable.

[0066] Figure 1 This is a schematic diagram of an application scenario provided by the embodiment of this application. Figure 1, including terminal equipment. When the terminal equipment receives the magnetic strength of the furnace tube, the terminal equipment can determine the thickness of the carbon penetration layer of the furnace tube according to the magnetic strength of the furnace tube, and determine the carburization degree of the furnace tube according to the thickness of the carbon penetration layer of the furnace tube, and then accurately determine the state of the furnace tube according to the carburization degree. In this way, when determining the state of the furnace tube, if the carburization degree determined according to the magnetic strength is large, the state of the furnace tube is a non-weldable state, and if the carburization degree determined according to the magnetic strength is small, the state of the furnace tube is a weldable state, thereby improving the accuracy of detecting the state of the furnace tube.

[0067] The technical solutions shown in the present application are described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other, and the same or similar contents will not be described repeatedly in different embodiments.

[0068] Figure 2 A flow chart of a furnace tube status detection method provided in an embodiment of the present application. Figure 2 , the method may include:

[0069] S201, obtaining the magnetic strength of the furnace tube.

[0070] The execution subject of the embodiment of the present application can be a terminal device, or a furnace tube status detection device arranged in the terminal device. Optionally, the furnace tube status detection device can be implemented by software, or by a combination of software and hardware.

[0071] The terminal device may be any device with processing functions, for example, a mobile phone, a computer, or the like.

[0072] The furnace tubes may be furnace tubes of a cracking furnace. The cracking furnace may be an ethylene cracking furnace. For example, the ethylene cracking furnace may process various raw materials such as natural gas, refinery gas, crude oil and petroleum into cracked gas and transmit the cracked gas to other ethylene plants. Optionally, the cracking furnace may transmit the cracked gas to the ethylene plant via the furnace tubes.

[0073] The magnetic intensity may be the magnetic induction intensity of the furnace tube. For example, the magnetic intensity of the furnace tube may be obtained by measuring the magnetic induction intensity of the furnace tube.

[0074] Optionally, the magnetic strength of the furnace tube can be obtained according to the following feasible implementation: the magnetic strength of the furnace tube is obtained according to a magnetic induction detector. For example, the terminal device can include a carburizing detector made based on the magnetic induction principle, and the magnetic strength of the furnace tube can be obtained through the carburizing detector.

[0075] S202. Determine the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength.

[0076] When the cracking furnace is working, the surface temperature of the furnace tube is high (1000 degrees Celsius), and the medium in the furnace tube is a mixed gas of hydrocarbons. Therefore, the furnace tube of the cracking furnace will be affected by creep, carburization and oxidation. Among them, creep refers to the slow movement or deformation of the material of the furnace tube when the furnace tube is subjected to stress. The higher the temperature of the furnace tube, the more severe the creep. Carburization is the phenomenon that carbon sources penetrate into the surface layer of the furnace tube. Carbon element can affect the weldability of the cracking furnace tube. For example, the higher the carbon atom content on the surface of the furnace tube, the lower the weldability of the furnace tube, and the lower the carbon atom content on the surface of the furnace tube, the higher the weldability of the furnace tube.

[0077] The thickness of the carbon permeation layer can be the thickness of the carbon atoms in the medium permeating into the inner wall of the furnace tube. For example, if there are carbon atoms permeating from the medium at 3 mm of the inner wall of the furnace tube, the thickness of the carbon permeation layer is 3 mm.

[0078] Optionally, the thickness of the carbon permeation layer may be obtained according to the following feasible implementation: a first preset relationship between the magnetic intensity and the thickness of the carbon permeation layer is obtained. The first preset relationship includes at least one magnetic intensity and the thickness of the carbon permeation layer corresponding to each magnetic intensity. For example, the first preset relationship between the magnetic intensity and the thickness of the carbon permeation layer may be as shown in Table 1:

[0079] Table 1

[0080] Magnetic strength The thickness of the carbon permeation layer Magnetic strength 1 Thickness 1 Magnetic strength 2 Thickness 2 Magnetic strength 3 Thickness 3 Magnetic strength 4 Thickness 4 …… ……

[0081] It should be noted that Table 1 is only an example to illustrate the first preset relationship between the magnetic strength and the thickness of the carbon permeation layer, and is not a limitation on the first preset relationship between the magnetic strength and the thickness of the carbon permeation layer.

[0082] The thickness of the carbon permeation layer of the furnace tube is determined according to the magnetic strength and the first preset relationship. For example, if the magnetic strength of the furnace tube obtained by the carburizing detector is a magnetic strength of 1, the thickness of the carbon permeation layer on the inner wall of the furnace tube is thickness 1; if the magnetic strength of the furnace tube obtained by the carburizing detector is a magnetic strength of 2, the thickness of the carbon permeation layer on the inner wall of the furnace tube is thickness 2; if the magnetic strength of the furnace tube obtained by the carburizing detector is a magnetic strength of 3, the thickness of the carbon permeation layer on the inner wall of the furnace tube is thickness 3; if the magnetic strength of the furnace tube obtained by the carburizing detector is a magnetic strength of 4, the thickness of the carbon permeation layer on the inner wall of the furnace tube is thickness 4.

[0083] Optionally, for furnace tubes of the same material, it can be obtained through comparative tests that the magnetic strength of the furnace tube is strongly correlated with the thickness of the carbon permeation layer of the furnace tube. Therefore, the thickness of the carbon permeation layer of the furnace tube can be determined by the magnetic strength of the furnace tube. Optionally, the first preset relationship between the magnetic strength and the thickness of the carbon permeation layer can be determined according to the following feasible implementation method: obtain a plurality of furnace tubes of the same material and structure, obtain the thickness of the carbon permeation layer corresponding to each furnace tube according to the metallographic inspection method, and obtain the magnetic strength corresponding to each furnace tube according to the carburizing detector, and then obtain the first preset relationship between the magnetic strength and the thickness of the carbon permeation layer. Among them, the metallographic inspection method is used to detect the thickness of the carbon permeation layer on the inner wall of the furnace tube. For example, the thickness of the carbon permeation layer on the inner wall of the furnace tube can be obtained according to low-power acid etching. For example, for any furnace tube, the thickness of the carbon permeation layer on the inner wall of the furnace tube is obtained according to the metallographic inspection method, and the furnace tube is tested according to the carburizing detector to obtain the magnetic strength of the furnace tube, and then a set of corresponding relationships between the magnetic strength and the carbon permeation layer is obtained.

[0084] Optionally, for furnace tubes of the same material, comparative tests can be performed to determine that the magnetic strength of the furnace tube is strongly correlated with the thickness of the carbon permeation layer of the furnace tube. Therefore, the thickness of the carbon permeation layer of the furnace tube can be determined by the magnetic strength of the furnace tube.

[0085] S203: Determine the state of the furnace tube according to the thickness of the carbon permeation layer.

[0086] The state of the furnace tube is a weldable state or a non-weldable state. When the state of the furnace tube is a weldable state, the furnace tube can be welded normally and the furnace tube is not damaged. When the state of the furnace tube is a non-weldable state, the furnace tube cannot be welded normally and the furnace tube is damaged. For example, when a staff member inspects the furnace tube of a cracking furnace, if the state of the furnace tube is a weldable state, the staff member does not need to replace the furnace tube. If the state of the furnace tube is a non-weldable state, the staff member needs to replace the furnace tube in the non-weldable state.

[0087] Optionally, the state of the furnace tube can be determined according to the following feasible implementation method: the carburization degree of the furnace tube is determined according to the thickness of the carbon permeation layer. The carburization degree is used to indicate the penetration degree of carbon atoms in the tube wall of the furnace tube. For example, if the penetration degree of carbon atoms in the tube wall of the furnace tube is 10%, the carburization degree is 10%; if the penetration degree of carbon atoms in the tube wall of the furnace tube is 50%, the carburization degree is 50%; if the penetration degree of carbon atoms in the tube wall of the furnace tube is 80%, the carburization degree is 80%.

[0088] The state of the furnace tube is determined according to the carburizing degree. For example, since carbon atoms can affect the weldability of the furnace tube, if the carbon atom content in the furnace tube is high, the state of the furnace tube is a non-weldable state, and if the carbon atom content in the furnace tube is low, the state of the furnace tube is a weldable state. For example, if the carburizing degree corresponding to the furnace tube is high, the state of the furnace tube is a non-weldable state, and if the carburizing degree corresponding to the furnace tube is low, the state of the furnace tube is a weldable state.

[0089] The embodiment of the present application provides a method for detecting the state of a furnace tube, obtaining the magnetic strength of the furnace tube, obtaining a first preset relationship between the magnetic strength and the thickness of the carbon permeation layer of the furnace tube, and determining the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength of the furnace tube and the first preset relationship. According to the thickness of the carbon permeation layer, the carburization degree of the furnace tube is determined, wherein the carburization degree is used to indicate the degree of penetration of carbon atoms in the tube wall of the furnace tube. According to the carburization degree, the state of the furnace tube is determined. According to the above method, according to the magnetic strength and the first preset relationship, the thickness of the carbon permeation layer can be accurately determined, and according to the thickness of the carbon permeation layer, the carburization degree of the furnace tube can be accurately determined. Since carbon atoms can affect the weldability of the furnace tube, the state of the furnace tube can be accurately determined according to the carburization degree of the furnace tube, thereby improving the accuracy of the detection of the state of the furnace tube.

[0090] exist Figure 2 Based on the embodiment shown below, combined with Figure 3 , the detection method of the above-mentioned furnace tube status is described in detail.

[0091] Figure 3 A flow chart of another method for detecting the state of a furnace tube provided in an embodiment of the present application. Figure 3 , the method may include:

[0092] S301, obtaining the magnetic strength of the furnace tube.

[0093] Optionally, the magnetic strength of the furnace tube may be obtained using a magnetic induction detector, or may be obtained using other instruments for testing magnetic induction strength.

[0094] It should be noted that the execution method of step S301 is the same as the execution method of step S201, and will not be described in detail in the embodiment of the present application.

[0095] S302. Determine the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength.

[0096] Under high temperature conditions, the accumulation of carbon inside the furnace tube increases the carbon content in the metal structure. Carburization of the furnace tube causes the composition of the furnace tube material to change, and the content of carbon compounds increases, making the inner surface of the furnace tube more brittle. In addition, since the physical properties of carbides are different from those of the furnace tube material, when the furnace tube of the cracking furnace is heated, the degree of expansion inside the furnace tube is different, and stress is generated at the interface of the carburized layer. Under the repeated action of stress, tiny cracks are generated on the inner wall of the furnace tube, which leads to damage to the furnace tube.

[0097] Optionally, in an experimental environment, the thickness of the carbon permeation layer of the furnace tube can be determined according to the metallographic detection method. For example, the furnace tube is placed in a low-power acid, and the furnace tube is corroded by the low-power acid to obtain the thickness of the carbon permeation layer of the furnace tube. In the process of actual application, since the furnace tube is installed in a cracking furnace, if the metallographic detection method is used to measure the thickness of the carbon permeation layer of the furnace tube, it will cause damage to the furnace tube, making the furnace tube unusable. Since the thickness of the carbon permeation layer of the furnace tube is strongly related to the magnetic strength of the furnace tube, therefore, the first preset relationship between the magnetic strength of the furnace tube and the thickness of the carbon permeation layer of the furnace tube can be determined during the experiment. In the actual application process, the magnetic strength of the furnace tube is obtained according to the carburizing detector, and then the thickness of the carbon permeation layer of the furnace tube is determined according to the magnetic strength and the first preset relationship.

[0098] Optionally, for different materials, the first preset relationship corresponding to the furnace tube is different. For example, if the material of furnace tube A is material 1 and the material of furnace tube B is material B, the thickness of the carbon permeation layer of furnace tube A is determined according to the first preset relationship and magnetic strength corresponding to furnace tube A, and the thickness of the carbon permeation layer of furnace tube B is determined according to the first preset relationship and magnetic strength corresponding to furnace tube B.

[0099] S303. Determine the carburization degree of the furnace tube according to the thickness of the carbon penetration layer.

[0100] The degree of carburization of the furnace tube can be determined according to the following feasible implementation method: obtain the wall thickness of the furnace tube. The wall thickness of the furnace tube is the thickness of the tube wall of the furnace tube. For example, if the thickness of the tube wall of the furnace tube is 7 mm, then the wall thickness of the furnace tube is 7 mm. Optionally, the wall thickness of the furnace tube can be obtained according to the manufacturer of the furnace tube. For example, when purchasing the furnace tube, the wall thickness of the purchased furnace tube can be obtained from the manufacturer. Optionally, the wall thickness of the furnace tube can be measured when the furnace tube is installed. For example, when the furnace tube is installed, the wall thickness of the installed furnace tube can be obtained by a measuring device such as a vernier caliper, and the installation position of the furnace tube can be recorded.

[0101] The carburization degree is determined according to the wall thickness of the furnace tube and the thickness of the carbon permeation layer of the furnace tube. Optionally, the ratio of the thickness of the carbon permeation layer of the furnace tube to the wall thickness of the furnace tube can be determined as the carburization degree. For example, if the wall thickness of the furnace tube is 10 mm and the thickness of the carbon permeation layer of the furnace tube is 5 mm, the carburization degree of the furnace tube is 50%; if the wall thickness of the furnace tube is 10 mm and the thickness of the carbon permeation layer of the furnace tube is 3 mm, the carburization degree of the furnace tube is 30%.

[0102] S304. Determine the state of the furnace tube according to the carburizing degree.

[0103] The degree of carburization of the furnace tube can be determined according to the following feasible implementation methods: obtain the material of the furnace tube. The material of the furnace tube is the constituent material of the furnace tube. For example, the material of the furnace tube can be the type of alloy or steel used to make the furnace tube. According to the material of the furnace tube, determine the critical value of the degree of carburization. The critical value of the degree of carburization of the furnace tube is used to indicate the weldability of the furnace tube. For example, if the degree of carburization of the furnace tube is greater than or equal to the critical value, the furnace tube cannot be welded, and if the degree of carburization of the furnace tube is less than the critical value, the furnace tube can be welded. Optionally, for different materials, the critical value of the degree of carburization of the furnace tube is different. For example, if the material of the furnace tube is 25Cr35NiNb and the size is Φ65×7mm, the critical value of the degree of carburization of the furnace tube is 50%; if the material of the furnace tube is 35Cr45NiNb and the size is Φ89×8mm, the critical value of the degree of carburization of the furnace tube is 40%. Optionally, the critical value of the degree of carburization of the furnace tube can be obtained according to an experimental method. For example, a plurality of furnace tubes with different carburization degrees are obtained, and the critical value of the carburization degree of the furnace tubes is obtained by welding the furnace tubes. For example, the carburization degree of furnace tube A is carburization degree A, the carburization degree of furnace tube B is carburization degree B, and the carburization degree of furnace tube C is carburization degree C. If, during the test, the state of furnace tube A is a weldable state, the state of furnace tube B is a weldable state, and the state of furnace tube C is a non-weldable state, the critical value of the carburization degree of the furnace tube is carburization degree C. Optionally, in the actual measurement process, a plurality of furnace tubes with the same material and similar carburization degrees can be obtained, and the critical value of the carburization degree of the furnace tube can be accurately determined.

[0104] According to the carburizing degree and the critical value, the state of the furnace tube is determined. Optionally, when the carburizing degree is greater than or equal to the critical value, the state of the furnace tube is determined to be a non-weldable state. For example, if the carburizing degree of the furnace tube is greater than or equal to the critical value, it means that the carbon content in the furnace tube material is high, making the furnace tube non-weldable, and therefore, the state of the furnace tube is a non-weldable state. When the carburizing degree is less than the critical value, the state of the furnace tube is determined to be a weldable state. For example, if the carburizing degree of the furnace tube is less than the critical value, it means that the carbon content in the furnace tube material is low, and the carbon atoms in the furnace tube are not enough to affect the weldability of the furnace tube, and therefore, the state of the furnace tube is a weldable state.

[0105] The embodiment of the present application provides a method for detecting the state of a furnace tube, obtaining the magnetic strength of the furnace tube, determining the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength, obtaining the wall thickness of the furnace tube, determining the thickness of the carbon permeation layer and the ratio of the wall thickness of the furnace tube as the carburization degree of the furnace tube, obtaining the critical value corresponding to the material of the furnace tube, and determining the state of the furnace tube as a non-weldable state when the carburization degree of the furnace tube is greater than or equal to the critical value, and determining the state of the furnace tube as a weldable state when the carburization degree of the furnace tube is less than the critical value. According to the above method, since the magnetic strength and the thickness of the carbon permeation layer are strongly correlated, the thickness of the carbon permeation layer of the furnace tube can be accurately determined according to the magnetic strength of the furnace tube, and then the carburization degree of the furnace tube can be accurately determined. When the carburization degree is greater than or equal to the critical value, the state of the furnace tube is determined to be a non-weldable state, and the furnace tube is replaced, which can improve the accuracy of detecting the state of the furnace tube.

[0106] Based on any of the above embodiments, Figure 4 , the process of the above-mentioned furnace tube status detection method is explained.

[0107] Figure 4 A process diagram of a furnace tube status detection method provided in an embodiment of the present application. Figure 4 , including a terminal device. The terminal device can obtain the magnetic strength of the furnace tube, and the terminal device includes a first preset relationship between the magnetic strength of the furnace tube and the thickness of the carbon permeation layer of the furnace tube. The thickness of the carbon permeation layer of the furnace tube is determined according to the magnetic strength and the first preset relationship.

[0108] See also Figure 4 , the terminal device can obtain the wall thickness of the furnace tube, and obtain the carburization degree of the furnace tube according to the thickness of the carbon permeation layer of the furnace tube and the wall thickness of the furnace tube, and then determine the state of the furnace tube according to the carburization degree of the furnace tube and the critical value corresponding to the furnace tube material. In this way, in the actual application process, the terminal device only needs to determine the material of the furnace tube, the wall thickness of the furnace tube and the magnetic strength of the furnace tube to obtain the state of the furnace tube, and then replace the non-weldable furnace tube, which not only saves costs, but also, because the magnetic strength is strongly related to the thickness of the carbon permeation layer, the state of the furnace tube can be accurately determined according to the magnetic strength, thereby improving the accuracy of detecting the state of the furnace tube.

[0109] Figure 5 This is a schematic diagram of a furnace tube status detection device provided in an embodiment of the present application. The furnace tube status detection device 10 can be set in a terminal device. Figure 5 The furnace tube state detection device 10 may include an acquisition module 11, a first determination module 12, and a second determination module 13, wherein:

[0110] The acquisition module 11 is used to acquire the magnetic strength of the furnace tube;

[0111] The first determination module 12 is used to determine the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength;

[0112] The second determining module 13 is used to determine the state of the furnace tube according to the thickness of the carbon permeation layer, and the state of the furnace tube is a weldable state or a non-weldable state.

[0113] In a possible implementation manner, the second determining module 13 is specifically configured to:

[0114] Determining the carburization degree of the furnace tube according to the thickness of the carbon permeation layer, wherein the carburization degree is used to indicate the penetration degree of carbon atoms into the tube wall of the furnace tube;

[0115] The state of the furnace tube is determined according to the carburizing degree.

[0116] In a possible implementation manner, the second determining module 13 is specifically configured to:

[0117] Obtaining the material of the furnace tube;

[0118] Determining the critical value of the carburizing degree according to the material of the furnace tube;

[0119] The state of the furnace tube is determined according to the carburizing degree and the critical value.

[0120] In a possible implementation manner, the second determining module 13 is specifically configured to:

[0121] When the carburizing degree is greater than or equal to the critical value, determining that the furnace tube is in a non-weldable state;

[0122] When the carburizing degree is less than the critical value, it is determined that the state of the furnace tube is a weldable state.

[0123] In a possible implementation manner, the second determining module 13 is specifically configured to:

[0124] Obtaining the wall thickness of the furnace tube;

[0125] The carburizing degree is determined according to the wall thickness of the furnace tube and the thickness of the carbon permeation layer.

[0126] In a possible implementation manner, the second determining module 13 is specifically configured to:

[0127] The ratio of the thickness of the carbon permeation layer to the wall thickness of the furnace tube is determined as the carburization degree.

[0128] In a possible implementation manner, the first determining module 12 is specifically configured to:

[0129] Acquire a first preset relationship between the magnetic intensity and the thickness of the carbon permeation layer, wherein the first preset relationship includes at least one magnetic intensity and the thickness of the carbon permeation layer corresponding to each magnetic intensity;

[0130] The thickness of the carbon permeation layer of the furnace tube is determined according to the magnetic strength and the first preset relationship.

[0131] The furnace tube status detection device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be repeated here.

[0132] Figure 6 Schematic diagram of the hardware structure of the furnace tube status detection equipment provided for this application. Figure 6 The furnace tube status detection device 20 may include: a processor 21 and a memory 22, wherein the processor 21 and the memory 22 can communicate; illustratively, the processor 21 and the memory 22 communicate via a communication bus 23, the memory 22 is used to store program instructions, and the processor 21 is used to call the program instructions in the memory to execute the furnace tube status detection method shown in any of the above method embodiments.

[0133] Optionally, the furnace tube status detection device 20 may further include a communication interface, and the communication interface may include a transmitter and / or a receiver.

[0134] Optionally, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the present application may be directly implemented as being executed by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

[0135] The present application provides a readable storage medium, on which a computer program is stored; the computer program is used to implement the method for detecting the furnace tube state as described in any of the above embodiments.

[0136] An embodiment of the present application provides a computer program product, which includes instructions. When the instructions are executed, a computer executes the above-mentioned furnace tube status detection method.

[0137] All or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a readable memory. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviated: ROM), RAM, flash memory, hard disk, solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.

[0138] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable terminal device to generate a machine, so that the instructions executed by the processing unit of the computer or other programmable terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0139] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0140] These computer program instructions can also be loaded onto a computer or other programmable terminal device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0141] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0142] In the present application, the term "include" and its variations may refer to non-restrictive inclusion; the term "or" and its variations may refer to "and / or". The terms "first", "second", etc. in the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In the present application, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previously associated objects are in an "or" relationship.

Claims

1. A method for detecting a furnace tube state, characterized in that: include: Obtaining the magnetic strength of the furnace tube; Acquire a first preset relationship between the magnetic intensity and the thickness of the carbon permeation layer, wherein the first preset relationship includes at least one of the magnetic intensity and the thickness of the carbon permeation layer corresponding to each of the magnetic intensity; determining a thickness of the carbon permeation layer of the furnace tube according to the magnetic strength and the first preset relationship; The state of the furnace tube is determined according to the thickness of the carbon permeation layer, and the state of the furnace tube is a weldable state or a non-weldable state.

2. The method according to claim 1, characterized in that Determining the state of the furnace tube according to the thickness of the carbon permeation layer includes: Determining the carburization degree of the furnace tube according to the thickness of the carbon permeation layer, wherein the carburization degree is used to indicate the penetration degree of carbon atoms into the tube wall of the furnace tube; The state of the furnace tube is determined according to the carburizing degree.

3. The method according to claim 2, characterized in that Determining the state of the furnace tube according to the carburizing degree includes: Obtaining the material of the furnace tube; Determining the critical value of the carburizing degree according to the material of the furnace tube; The state of the furnace tube is determined according to the carburizing degree and the critical value.

4. The method according to claim 3, characterized in that Determining the state of the furnace tube according to the carburizing degree and the critical value includes: When the carburizing degree is greater than or equal to the critical value, determining that the furnace tube is in a non-weldable state; When the carburizing degree is less than the critical value, it is determined that the state of the furnace tube is a weldable state.

5. The method according to any one of claims 2 to 4, characterized in that: Determining the carburization degree of the furnace tube according to the thickness of the carbon penetration layer includes: Obtaining the wall thickness of the furnace tube; The carburizing degree is determined according to the wall thickness of the furnace tube and the thickness of the carbon permeation layer.

6. The method according to claim 5, characterized in that Determining the carburization degree of the furnace tube according to the wall thickness of the furnace tube and the thickness of the carbon penetration layer includes: The ratio of the thickness of the carbon permeation layer to the wall thickness of the furnace tube is determined as the carburization degree.

7. A furnace tube status detection device, characterized in that: It includes an acquisition module, a first determination module and a second determination module, wherein: The acquisition module is used to acquire the magnetic strength of the furnace tube; The first determination module is used to obtain a first preset relationship between the magnetic strength and the thickness of the carbon permeation layer, wherein the first preset relationship includes at least one magnetic strength and the thickness of the carbon permeation layer corresponding to each magnetic strength; and determine the thickness of the carbon permeation layer of the furnace tube according to the magnetic strength and the first preset relationship; The second determination module is used to determine the state of the furnace tube according to the thickness of the carbon permeation layer, and the state of the furnace tube is a weldable state or a non-weldable state.

8. A furnace tube status detection device, characterized in that: include: Processor, memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method for detecting the furnace tube state according to any one of claims 1 to 6.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for detecting the furnace tube status according to any one of claims 1 to 6 is implemented.

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