Hot-rolled plate thickness measuring equipment

Abstract

The invention relates to hot rolled plate thickness measuring equipment, and belongs to the technical field of detection equipment. The hot-rolled plate thickness measuring equipment comprises a control module and a plurality of detection mechanisms. Each detection mechanism comprises a radioactive source and a detection assembly. The detection assembly and the radioactive source are oppositely arranged in the thickness direction of the hot-rolled plate, and a gap for the hot-rolled plate to penetrate through is reserved between the detection assembly and the radioactive source. The detection mechanism is used for measuring the actual thickness size of the hot-rolled plate at the position; at least part of the multiple detection mechanisms can move in a reciprocating mode in the width direction of the hot rolled plate. And the control module controls the detection mechanism to stop or move in the width direction of the hot-rolled plate based on the variance of n actual thickness sizes of the hot-rolled plate continuously measured by the detection mechanism at the same position. The hot-rolled plate thickness measuring equipment provided by the invention can accurately measure the thickness dimension data of each part of the hot-rolled plate.

Description

Technical Field

[0001] The present application relates to the technical field of detection equipment, and in particular to a hot-rolled plate thickness measuring device. Background Art

[0002] In the rolling production of hot-rolled plates, the thickness accuracy of hot-rolled plates plays a decisive role in product quality. The accurate measurement of the thickness of hot-rolled plates by thickness measuring equipment is a key link in ensuring that products meet quality standards and meet the diverse needs of downstream industries. At present, most of the mainstream hot-rolled plate thickness measuring equipment on the market adopts a fixed-position detection mechanism. This traditional equipment has significant defects in data acquisition and measurement stability. On the one hand, a single detection mechanism can only obtain the thickness dimension information of the area it is facing per unit time. Since the position of the detection mechanism is fixed and the number is limited, it is difficult to fully cover the width direction of the hot-rolled plate, resulting in a small amount of actual thickness data obtained, and it is impossible to fully present the thickness information of the hot-rolled plate at various locations, which seriously affects the monitoring of the overall thickness distribution of the plate. On the other hand, traditional equipment lacks an adaptive dynamic measurement mechanism. When the thickness of the hot-rolled plate fluctuates or is disturbed by vibration, it is impossible to intelligently adjust the detection strategy. In actual production, if a hot-rolled plate has uneven thickness or is affected by vibration in a certain area, the fixed detection mechanism may cause data deviation due to insufficient sampling. This makes it impossible to accurately capture thickness variations along the length and difficult to eliminate measurement errors caused by vibration. This can easily lead to missed detections and misjudgments, resulting in increased product scrap rates and severely restricting production efficiency and economic benefits. As the steel industry continues to increase its requirements for product quality, there is an urgent need for thickness measurement equipment with dynamic adjustment capabilities to optimize data collection strategies and improve measurement accuracy and stability. Summary of the Invention

[0003] The purpose of this application is to provide a hot-rolled plate thickness measuring device to address the above problems, which can obtain more and more comprehensive thickness dimension data of various parts of the hot-rolled plate, so as to improve the above problems.

[0004] This application is achieved through the following technical solutions: The present application provides a hot-rolled plate thickness measuring device for detecting the thickness of a hot-rolled plate moving along its own length direction. The hot-rolled plate thickness measuring device includes a control module and a plurality of detection mechanisms. The detection mechanism includes a radiation source and a detection component; the detection component and the radiation source are arranged opposite to each other along the thickness direction of the hot-rolled plate, and a gap for the hot-rolled plate to pass through is reserved between the two; the detection mechanism is used to measure the actual thickness dimension of the hot-rolled plate at its own position; the plurality of detection mechanisms are arranged in sequence along the width direction of the hot-rolled plate; at least some of the plurality of detection mechanisms can reciprocate along the width direction of the hot-rolled plate; the control module controls that the difference between the actual thickness dimension detected by each detection mechanism and the standard thickness dimension exceeds the preset error value as an abnormal point; the control module controls the detection mechanism to stop or move in the width direction of the hot-rolled plate based on the variance of the n actual thickness dimensions of the hot-rolled plate continuously measured by the detection mechanism at the same position.

[0005] In the technical solution of the embodiment of the present application, the detection mechanism includes a radiation source and a detection component. The steel plate being rolled passes between the detection component and the radiation source. The detection component and the radiation source are arranged opposite to each other along the thickness direction of the hot-rolled plate, so that the rays received by the detection component are the rays passing through the hot-rolled plate along the thickness direction of the hot-rolled plate (i.e., the vertical direction). When the hot-rolled plate passes between the radiation source and the detection component, part of the energy in the γ rays emitted by the radiation source can be absorbed by the hot-rolled plate. The detection component measures the remaining energy intensity of the radioactive rays (i.e., the actual energy intensity). Based on the actual energy intensity measured by the detection component and the rated energy intensity of the radiation source, the value of the energy absorbed by the hot-rolled plate is obtained, and then the actual thickness dimension of the hot-rolled plate is calculated through this value. The γ rays emitted by the radiation source can stably pass through hot-rolled plates with a thickness of 5 mm to 150 mm, having a wider application range. Moreover, the process of the γ rays passing through the hot-rolled plate will not be affected by the high-temperature environment and the continuous movement of the hot-rolled plate, and can stably measure the actual thickness dimension of the hot-rolled plate, and can have a high measurement accuracy in a complex measurement environment; a plurality of detection mechanisms are arranged in sequence along the width direction of the hot-rolled plate, so as to obtain the actual thickness dimensions at multiple positions in the width direction of the hot-rolled plate. At least part of the thickness measurement mechanisms have the ability to move in the width direction of the hot-rolled plate, which makes a single thickness measurement mechanism no longer limited to a fixed position, but can perform dynamic scanning measurement on multiple regions in the width direction. Compared with the traditional fixed-position detection method, this layout combining static and dynamic not only retains the efficiency advantage of multi-point synchronous detection, but also improves the measurement coverage range through the mobility of the detectable mechanism, expanding the single-point detection range from a fixed area to a dynamic coverage interval, enabling the device to perform high-density data acquisition for the entire region in the width direction of the hot-rolled plate, covering not only the traditional fixed detection points, but also being able to perform targeted scanning on positions such as the edge transition region and the stress concentration region where local thickness anomalies are likely to occur. In order to obtain the thickness information of the hot-rolled plate as comprehensively as possible, as many actual thickness data of each part of the hot-rolled plate as possible are needed. However, a single detection mechanism can only obtain the thickness dimension information of the region directly opposite to it within a unit time, and the amount of data is small. To solve this problem, the present application compares the variance value of the n (n≥3) actual thickness dimensions of the hot-rolled plate continuously measured by the detection mechanism at the same position with the preset variance value. When the variance value of the n actual thickness dimensions does not exceed the preset variance value, it can be known that the actual thickness dimensions in the length direction of this region of the hot-rolled plate have high consistency, and even the actual thickness dimensions of other parts of this region can be inferred based on the known actual thickness dimensions within a unit time. At this time, the control module controls the detection mechanism to move to the unmeasured region. This strategy avoids repeated acquisition of similar data in the stable region, enabling the detection mechanism to cover more positions in the width direction within the same time. For example, compared with the traditional fixed measurement method that can only collect a small amount of fixed-point data, this strategy can increase the data coverage area by several times, which helps to comprehensively monitor the thickness distribution in the width direction of the hot-rolled plate.When the variance value of the n actual thickness dimensions exceeds the preset variance value, it indicates that there may be uneven thickness or significant vibration interference in this area of the hot-rolled plate. At this time, the detection mechanism stops moving and continuously measures, and by increasing the number of samplings, the amount of data in the unstable area increases significantly. When the unstable area is the uneven thickness distribution in the length direction, a large number of data samples help to monitor the thickness distribution in the length direction of the hot-rolled plate; while when the unstable area is affected by the vibration of the hot-rolled plate, a large number of data samples can eliminate the vibration noise through statistical methods and then extract the true thickness value. For example, at a certain vibration point, the single measurement error is large, but by continuously measuring multiple times and taking the average value, the error range can be significantly reduced and the data reliability can be improved.

[0006] In some embodiments, the control module controls the detection mechanism to move in the width direction of the hot-rolled plate to deviate from the abnormal point based on the position of the abnormal point.

[0007] In the technical solution of the embodiment of the present application, during the production process of hot-rolled plates, local vibration may occur in the area directly opposite any detection mechanism, which may lead to large errors in the data of the actual thickness dimensions of the hot-rolled plates measured by the detection mechanism. These measurement results with large errors will be screened out during subsequent data processing, resulting in a reduction in the actual amount of data obtained, and it is difficult to truly display the actual thickness dimensions and distribution of the hot-rolled plates. To solve this problem, the control module in the present application continuously obtains the actual thickness dimensions measured by each detection mechanism and compares them with the standard thickness dimensions. If the difference between the two exceeds the preset error value, the control module marks the position where the detection mechanism is located as an abnormal point. Based on the position information of the abnormal point, the control module controls the detection mechanism that can move to move along the width direction of the hot-rolled plate to deviate from the abnormal point. Avoiding the area with large vibration interference, the thickness measurement is carried out again (the preset error value is the possible range of thickness dimensions of the hot-rolled plate during measurement. Therefore, the place where the difference in the measurement results exceeds the preset error value can be considered to be affected by local vibration or other factors in the processing environment). The hot-rolled plate thickness measurement device provided by the present application continuously measures the thickness of the moving hot-rolled plate and continuously repeats the above processes of data processing, abnormal point determination, and detection mechanism adjustment to ensure dynamic and accurate monitoring of the thickness of the hot-rolled plate. In addition, since the area where local vibration occurs in the hot-rolled plate may change, and the hot-rolled plate is in continuous motion, when the detection mechanism moves, the determination of the abnormal point at the position before movement can be cancelled, and the detection mechanism can return to this position after subsequent movement. The hot-rolled plate thickness measurement device provided by the present application solves the problem of unstable ray penetration path caused by local vibration of the hot-rolled plate by controlling the detection mechanism to deviate from the abnormal point. After the detection mechanism moves to the area with less vibration, the effective thickness of the ray penetrating the hot-rolled plate is more stable, the fluctuation of the ray intensity signal received by the detector decreases, the measurement error is greatly reduced, and the measurement data is closer to the actual thickness of the hot-rolled plate. Moreover, the design that the detection mechanism can move along the width direction of the hot-rolled plate enables the device to adapt to the thickness measurement of hot-rolled plates under different vibration conditions. No matter where the vibration occurs in the moving hot-rolled plate, the device can adjust the position of the detection mechanism to maintain accurate measurement accuracy, improving the adaptability and reliability of the device in a complex production environment.

[0008] In some embodiments, the control module controls the detection mechanism to reciprocate centered on the abnormal point in the width direction of the hot-rolled plate based on the position of the abnormal point until the difference between the actual thickness dimensions of multiple hot-rolled plates continuously measured by the detection mechanism and the standard thickness dimensions does not exceed the preset error value.

[0009] In the technical solution of the embodiments of the present application, a movable detection mechanism can continuously move along the width of the hot-rolled plate to obtain the actual thickness of each location on the hot-rolled plate during use. When the difference between the actual thickness of a location on the hot-rolled plate obtained by the detection mechanism and the standard thickness of the hot-rolled plate exceeds a preset error value, the control module controls the detection mechanism to move back and forth along the width of the hot-rolled plate with the abnormal point as the center until the difference between the actual thickness of the hot-rolled plate and the standard thickness of the hot-rolled plate measured by the detection mechanism at multiple locations does not exceed the preset error value. This allows the user to infer the outline, location, and size of the area where the thickness anomaly occurs based on the positions of the measured multiple abnormal points, allowing the user to process the area of the hot-rolled plate based on this information. In addition, this information can be used to determine whether the processing equipment (such as rollers, etc.) used in the hot-rolled plate is deformed, damaged, or misaligned. The actual thickness data of the hot-rolled plate obtained in this manner can not only determine the uniformity of the overall thickness distribution of the hot-rolled plate, but also accurately capture local thickness fluctuations or defects in the hot-rolled plate, providing a more complete data source for subsequent quality analysis and fundamentally reducing the risk of missed detection.

[0010] In some embodiments, at least one detection mechanism among the plurality of detection mechanisms is aligned with the center line of the hot-rolled plate.

[0011] In the technical solution of the embodiment of the present application, at least one of the multiple detection mechanisms is facing the center line of the hot-rolled plate to stably obtain the actual thickness dimension data of the central part of the hot-rolled plate (i.e., the thickest part of the hot-rolled plate). The detection mechanisms other than the detection mechanism facing the center line can be moved to adapt to the measured width dimension of the hot-rolled plate to ensure that the measurement position can be close to the edge of the hot-rolled plate with different width dimensions, thereby obtaining the thickness dimension information of the edge part of the hot-rolled plate with different width dimensions, thereby improving the application scope of the hot-rolled plate thickness measuring equipment provided by the present application and improving the accuracy of the convexity of the hot-rolled plate finally measured.

[0012] In some embodiments, it also includes a frame; the detection mechanism is arranged on the frame; gears and driving parts are arranged on the inner side of the frame, and the detection components and radiation sources of the detection mechanism that are offset from the center line of the hot-rolled plate are both provided with racks for engaging with the gears; the driving part drives the gear to rotate back and forth to drive the detection mechanism to move back and forth along the width direction of the hot-rolled plate.

[0013] In the technical solution of the embodiment of the present application, the rack on the detection assembly rotates synchronously with the rack on the radiation source, and the gear rotates reciprocally to drive the detection mechanism to reciprocally move along the width direction of the hot-rolled plate. The meshing of the gear-rack structure has high precision, which can achieve precise motion control, enabling the detection assembly and the radiation source to always face each other directly, avoiding the increase in the path length of γ-rays passing through the hot-rolled plate due to the position deviation between the two, which affects the actual energy intensity measured by the detection assembly, and improving the accuracy of the measurement result; in addition, the gear and the rack transmit force and motion through meshing with each other, so their motion is relatively stable, without phenomena such as impact and vibration, thereby reducing the risk of relative position deviation of the detection assembly and the radiation source during movement due to factors such as vibration.

[0014] In some embodiments, a limiting groove is further provided inside the frame; the rack is arranged inside the limiting groove; the limiting groove is used to limit the moving direction of the rack from deviating from the width direction of the hot-rolled plate.

[0015] In the technical solution of the embodiment of the present application, when the detection assembly moves along the width direction of the hot-rolled plate, it will move in contact with the surface of the frame. When the surface of the frame is not flat enough or the vibration of the processing environment is relatively intense and transmitted to the frame, the moving path of the detection assembly may be affected, causing the lens of the detection assembly for receiving γ-rays to deflect, resulting in the length direction of the ray with the strongest energy received by the detection assembly deviating from the thickness direction of the hot-rolled plate, thereby affecting the measurement structure. To solve this problem, a limiting groove is provided inside the frame, and the rack is movably arranged in the limiting groove, so that the limiting groove restricts (mainly the rack connecting the detection assembly) the moving direction of the rack, thereby avoiding the moving direction of the rack from deviating from the width direction of the hot-rolled plate and ensuring the accuracy of the measurement structure.

[0016] In some embodiments, both the detection assembly and the radiation source of the detection mechanism that are offset from the center line of the hot-rolled plate are provided with positioning boxes and elastic members; the rack is arranged inside the positioning box in a vertically movable manner; the elastic member is arranged between the first wall of the positioning box and the rack; the elastic member pushes the rack to abut against and mesh with the gear; the inner wall of the limiting groove fits with the outer wall surface of the positioning box; the surface of the limiting groove facing the opening of the positioning box is the second wall; the rack contacts the second wall.

[0017] In the technical solution of the embodiment of the present application, the elastic member inside the positioning box pushes the rack to abut and engage with the gear, improving the stability of the meshing state between the gear and the rack, thereby avoiding the situation where the positions of the detection component and the radiation source in a detection structure are misaligned due to slipping or other conditions; the elastic member is arranged inside the positioning box and moves synchronously with the rack, avoiding the wear of the elastic member caused by the change of the contact position between the elastic member and the rack; the inner wall of the limiting groove fits with the outer wall surface of the positioning box, enabling the limiting groove to limit the movement direction of the rack by restricting the movement direction of the positioning box; in addition, since the contact position between the gear and the rack changes with the movement of the rack, and the part of the rack farther from the gear may flip in the direction away from the first wall under the push of the elastic member and contact the second wall. When there is a tendency for a local part of the rack to flip, the contact between the rack and the second wall becomes abutment, thereby restricting the flipping of the rack and preventing the length direction of the rack from deviating from the width direction of the hot-rolled plate.

[0018] In some embodiments, the detection component includes a plurality of detection heads; the plurality of detection heads are arranged along the length direction of the hot-rolled plate; the detection heads are used to measure the current energy intensity of the rays passing through the hot-rolled plate; the actual energy intensity is determined based on the average value of the plurality of current energy intensities measured by the plurality of detection heads of the detection component.

[0019] In the technical solution of the embodiment of the present application, the actual energy intensity of the hot-rolled plate being measured is determined based on the average value of the current energy intensities of the γ-rays measured by the plurality of detection heads, avoiding the situation where there is a large error between the measurement result and the actual result due to factors such as floating dust in the air, damage of a certain detection head due to high temperature, and position offset caused by vibration, and improving the measurement accuracy.

[0020] In some embodiments, the orthographic projection of the plurality of detection heads along the thickness direction of the hot-rolled plate does not exceed the radiation source.

[0021] In the technical solution of the embodiment of the present application, the orthographic projection of the plurality of detection heads along the thickness direction of the hot-rolled plate does not exceed the radiation source, enabling the γ-rays emitted by the radiation source to be projected onto the detection heads along the thickness direction of the hot-rolled plate, avoiding the situation where the energy absorbed increases due to the increase in the moving path of the γ-rays in the hot-rolled plate, which affects the current energy intensity measured by the detection heads.

[0022] In some embodiments, a temperature control mechanism is further included; the temperature control mechanism covers the detection mechanism, and the temperature control mechanism is used to control the temperature of the detection mechanism.

[0023] In the technical solution of the embodiment of the present application, the temperature control mechanism wraps the detection mechanism. The temperature control mechanism can control the temperature of the detection mechanism, avoiding damage to the detection mechanism under the influence of high temperature and also avoiding the influence of the ambient temperature on the detection accuracy. In addition, the temperature control mechanism can control the temperature of the hot-rolled sheet passing between the detection component and the radiation source (mainly for cooling), avoiding the expansion or shrinkage of the hot-rolled sheet caused by too high or too low temperature of the whole or part of the hot-rolled sheet, which affects the measurement results obtained by the hot-rolled sheet thickness measuring device provided in the present application, leading to deviation of the judgment of the subsequent processing process of the hot-rolled sheet from the actual situation and resulting in the situation that the size of the finally produced hot-rolled sheet finished product does not meet the requirements.

[0024] In some embodiments, a flow channel for fluid to pass through is provided inside the temperature control mechanism.

[0025] In the technical solution of the embodiment of the present application, a flow channel for fluid to pass through is provided inside the temperature control mechanism. The detection mechanism and the hot-rolled sheet passing through the detection area of the detection mechanism are cooled by circulating coolant. The coolant can help dissipate heat relatively quickly and is not easily affected by the radiation of the radiation source. The hot-rolled sheet thickness measuring device provided in the present application replaces the step of watering the steel plate to cool it during the existing steel plate rolling process, avoiding the situation that a large amount of high-temperature steam accumulates between the detection component and the radiation source and affects the energy of the ray, and improving the accuracy of the measurement result.

[0026] In some embodiments, the temperature control mechanism further includes a temperature sensor for detecting the temperature of the fluid in the flow channel. The control module controls the flow rate of the fluid to increase or decrease based on the temperature of the fluid in the flow channel measured by the temperature sensor.

[0027] In the technical solution of the embodiment of the present application, the temperature sensor can monitor the coolant temperature in real time. The control module can control the power of the power equipment (such as input / output pumps, etc.) that drives the fluid into the flow channel to control the flow rate of the fluid in the flow channel. When the temperature of the fluid in the flow channel is relatively high, the control module controls the power of the power equipment to increase, so that the heated fluid can leave the flow channel faster and the cooler fluid can be replenished into the flow channel faster to ensure the stability of the detection mechanism and the processing environment. When the temperature of the fluid in the flow channel is relatively low, the control module controls the power of the power equipment to decrease. On the premise of not affecting the cooling effect of the fluid in the flow channel on the measurement environment, the liquid in the flow channel can pass through the flow channel more slowly, reducing the energy loss of the fluid and the power equipment, and saving energy and protecting the environment.

[0028] In some embodiments, a shielding layer is further provided outside the detection mechanism.

[0029] In the technical solution of the embodiment of the present application, a shielding layer is further provided outside the detection mechanism, which can block the γ rays emitted by the radiation source, reduce the influence of the rays of the radiation source on the equipment other than the detection component, improve the safety of the detection environment, and also delay the aging and damage rate of the detection component under the action of radioactive rays, and improve the service life of the detection component.

[0030] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic diagram of the overall structure of a hot-rolled plate thickness measuring device provided in some embodiments of the present application; Figure 2 It is a front view of a hot-rolled plate thickness measuring device provided in some embodiments of the present application; Figure 3 It is a perspective view of the frame of a hot-rolled plate thickness measuring device provided in some embodiments of the present application; Figure 4 It is a schematic diagram of a partial structure of a hot-rolled plate thickness measuring device provided in some embodiments of the present application; Figure 5 It is a schematic diagram of a partial structure of a hot-rolled plate thickness measuring device provided in other embodiments of the present application; Figure 6 It is a side view of a hot-rolled plate thickness measuring device provided in some embodiments of the present application; Figure 7 It is a schematic diagram of a partial structure of a detection mechanism provided in some embodiments of the present application; Figure 8 It is a partial cross-sectional view of a detection mechanism provided in some embodiments of the present application.

[0033] Reference numerals: 1, hot-rolled plate; 2, detection mechanism; 20, radiation source; 21, detection component; 210, detection head; 22, rack; 23, positioning box; 230, first wall; 24, elastic member; 3, frame; 30, gear; 31, limiting groove; 310, second wall; 4, temperature control mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of this application are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0036] Referring to "embodiments" in this application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0037] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The term "and / or" in this application is merely a description of the association relationship between associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0039] The term "plurality" as used in this application refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0040] According to some embodiments of the present application, optionally, as Figures 1 to 5 shown, the present application provides a hot-rolled plate thickness measuring device for measuring the thickness of a hot-rolled plate 1 moving along its own length direction. The hot-rolled plate thickness measuring device includes a control module and a plurality of detection mechanisms 2. The detection mechanism 2 includes a radiation source 20 and a detection component 21; the detection component 21 is disposed opposite to the radiation source 20 along the thickness direction of the hot-rolled plate 1, and there is a gap reserved between the two for the hot-rolled plate 1 to pass through; the detection mechanism 2 is used to measure the actual thickness dimension of the hot-rolled plate 1; a plurality of detection mechanisms 2 are arranged in sequence along the width direction of the hot-rolled plate 1; at least some of the plurality of detection mechanisms 2 reciprocate along the width direction of the hot-rolled plate 1; the point where the difference between the actual thickness dimension and the standard thickness dimension on the hot-rolled plate 1 exceeds a preset error value is an abnormal point; the control module controls the stop or movement of the detection mechanism 2 in the width direction of the hot-rolled plate 1 based on the variance of the n actual thickness dimensions of the hot-rolled plate 1 continuously measured by the detection mechanism 2 at the same position.

[0041] The hot-rolled plate 1 thickness measuring device mentioned in the present application can measure the thickness of a hot-rolled plate 1 with a width of 0 - 6 meters, a temperature up to 1200 °C, and a thickness range of 5 mm to 150 mm.

[0042] The radiation source 20 can be located below the hot-rolled plate 1, and the detection component 21 can be located above the hot-rolled plate 1.

[0043] The hot-rolled plate 1 can be closer to the radiation source 20 to reduce the influence of high temperature on the detection component 21.

[0044] The hot-rolled plate thickness measuring device mentioned in the present application measures the thickness of the hot-rolled plate 1 through γ rays: during the process that the rays of the radiation source 20 are projected onto the detection head 210 of the detection component 21, the hot-rolled plate 1 will absorb part of the energy of the rays, and the detection component 21 calculates the actual energy intensity (i.e., radioactivity intensity) of the rays passing through the hot-rolled plate 1 by recording the number of radioactive particles entering its sensitive area within a period of time.

[0045] Gamma rays, also known as gamma particle streams, are a special form of electromagnetic waves. They are the rays released when the atomic nucleus undergoes energy level transition and de-excitation, and are electromagnetic waves with a wavelength shorter than 0.01 angstrom (or 0.2 angstrom in another statement). In the electromagnetic spectrum, gamma rays have the shortest wavelength, the highest frequency, and the largest energy, and have extremely strong penetration ability.

[0046] The radiation source 20 mentioned in this application is a source chamber internally installed with radioactive materials (which can be but are not limited to Cs-137, Co-60, Am-241, Tm-170). The source chamber is only provided with an opening facing the detection component 21 along the thickness direction of the hot-rolled plate 1 (i.e., the vertical direction), ensuring that radioactive rays can reach the detection component 21 while blocking the rays of the radioactive materials inside from radiating in other directions deviating from the vertical direction, and reducing the impact of the radioactivity of the radiation source 20 on other equipment and objects in the processing environment.

[0047] The hot-rolled plate thickness measuring device mentioned in this application can be applied to the rolling process of plates. The hot-rolled plate thickness measuring device measures the thickness of the plates after rough rolling or several rolling passes, and the control center adjusts the force and number of subsequent rolling according to the difference between the actual thickness dimension of the plate and the standard thickness dimension of the required plate, so as to ensure that the actual thickness dimension of the finished product of the hot-rolled plate 1 meets the production requirements and improve the yield rate of production.

[0048] When there is no hot-rolled plate 1 passing through between the detection component 21 and the radiation source 20, the radioactive intensity of the radiation source 20 measured by the detection component 21 is the rated energy intensity mentioned in this application.

[0049] The value of n mentioned in this application can be 3, 4, 5, 6, 7, 8, 9, 10, or more.

[0050] The value of n and the preset variance value can be determined according to factors such as the thickness of the hot-rolled plate, the number of processing times, and the accuracy requirements for the thickness of the hot-rolled plate.

[0051] Variance is a mathematical feature that describes the degree of dispersion of a random variable around its central position, reflecting the degree of dispersion of the values of the random variable. The smaller the variance, the more concentrated the data and the higher the consistency; conversely, the lower the consistency.

[0052] The detection mechanism 2 includes a radiation source 20 and a detection component 21. The steel plate being rolled passes through between the detection component 21 and the radiation source 20. The detection component 21 and the radiation source 20 are oppositely arranged along the thickness direction of the hot-rolled plate 1, so that the rays received by the detection component 21 are the rays that pass through the hot-rolled plate 1 along the thickness direction (i.e., the vertical direction) of the hot-rolled plate 1. When the hot-rolled plate 1 passes through between the radiation source 20 and the detection component 21, part of the energy in the γ-rays emitted by the radiation source 20 can be absorbed by the hot-rolled plate 1. The detection component 21 measures the remaining energy intensity (i.e., the actual energy intensity) of the radioactive rays. Based on the actual energy intensity measured by the detection component 21 and the rated energy intensity of the radiation source 20, the value of the energy absorbed by the hot-rolled plate 1 is obtained, and then the actual thickness dimension of the hot-rolled plate 1 is calculated through this value. The γ-rays emitted by the radiation source 20 can stably pass through the hot-rolled plate 1 with a thickness of 5 mm to 150 mm, having a wider application range. Moreover, the process of the γ-rays passing through the hot-rolled plate 1 will not be affected by the high-temperature environment and the continuous movement of the hot-rolled plate 1, and can stably measure the actual thickness dimension of the hot-rolled plate 1, and can have a high measurement accuracy in a complex measurement environment; multiple detection mechanisms are arranged in sequence along the width direction of the hot-rolled plate 1, so as to obtain the actual thickness dimensions at multiple positions in the width direction of the hot-rolled plate 1. At least part of the thickness measurement mechanisms have the ability to move in the width direction of the hot-rolled plate 1, which makes a single thickness measurement mechanism no longer limited to a fixed position, but can perform dynamic scanning measurement on multiple regions in the width direction. Compared with the traditional fixed-position detection method, this layout combining static and dynamic not only retains the efficiency advantage of multi-point synchronous detection, but also improves the measurement coverage range through the mobility of the detectable mechanism, expanding the single-point detection range from a fixed area to a dynamic coverage interval, enabling the device to perform high-density data acquisition for the entire region in the width direction of the hot-rolled plate 1, covering not only the traditional fixed detection points, but also specifically scanning the positions such as the edge transition region and the stress concentration region where local thickness anomalies are likely to occur. In order to obtain the thickness information of the hot-rolled plate 1 as comprehensively as possible, actual thickness data at various positions of as many hot-rolled plates 1 as possible are required. However, a single detection mechanism 2 can only obtain the thickness dimension information of the area directly opposite to it within a unit time, and the amount of data is small. To solve this problem, the present application compares the variance value of the n (n≥3) actual thickness dimensions of the hot-rolled plate 1 continuously measured by the detection mechanism 2 at the same position with a preset variance value. When the variance value of the n actual thickness dimensions does not exceed the preset variance value, it can be known that the actual thickness dimensions in the length direction of this area of the hot-rolled plate 1 have high consistency, and even the actual thickness dimensions of other parts of this area can be inferred based on the known actual thickness dimensions within a unit time. At this time, the control module controls the detection mechanism 2 to move to the unmeasured area. This strategy avoids repeated acquisition of similar data in a stable area, enabling the detection mechanism 2 to cover more positions in the width direction within the same time.For example, compared with the traditional fixed measurement method that can only collect a small amount of fixed-point data, this strategy can increase the data coverage area by several times, which helps to comprehensively monitor the thickness distribution in the width direction of the hot-rolled sheet 1. When the variance value of n actual thickness dimensions exceeds the preset variance value, it indicates that there may be uneven thickness or significant vibration interference in this area of the hot-rolled sheet 1. At this time, the detection mechanism 2 stops moving and continues to measure. By increasing the sampling times, the amount of data in the unstable area increases significantly. When the unstable area is the uneven thickness distribution in the length direction, a large number of data samples help to monitor the thickness distribution in the length direction of the hot-rolled sheet 1; when the unstable area is affected by the vibration of the hot-rolled sheet 1, a large number of data samples can eliminate the vibration noise through statistical methods, and then extract the true thickness value. For example, at a certain vibration point, the single measurement error is large, but by continuously measuring multiple times and taking the average value, the error range can be significantly reduced and the data reliability can be improved.

[0053] According to some embodiments of the present application, optionally, the control module controls the detection mechanism 2 to move in the width direction of the hot-rolled sheet 1 to deviate from the abnormal point based on the position of the abnormal point.

[0054] During the production process of the hot-rolled plate 1, local vibration may occur in the area directly facing any detection mechanism, which may lead to a large error in the data of the actual thickness dimension of the hot-rolled plate 1 measured by the detection mechanism 2. These measurement results with large errors will be screened out in the subsequent data processing process, resulting in a reduction in the actual amount of data obtained, and it is difficult to truly display the actual thickness dimension and distribution of the hot-rolled plate 1. To solve this problem, the control module in this application continuously obtains the actual thickness dimension measured by each detection mechanism 2 and compares it with the standard thickness dimension. If the difference between the two exceeds the preset error value, the control module marks the position where the detection mechanism 2 is located as an abnormal point. Based on the position information of the abnormal point, the control module controls the movable detection mechanism 2 to move along the width direction of the hot-rolled plate 1 to deviate from the abnormal point. Avoiding the area with large vibration interference, the thickness measurement is carried out again (the preset error value is the possible thickness dimension range value of the hot-rolled plate 1 during measurement. Therefore, the place where the difference between the measurement results exceeds the preset error value can be considered to be affected by local vibration or other factors in the processing environment). The thickness measurement device for the hot-rolled plate 1 provided in this application continuously measures the thickness of the moving hot-rolled plate 1 and continuously repeats the above processes of data processing, abnormal point determination, and adjustment of the detection mechanism 2 to ensure dynamic and accurate monitoring of the thickness of the hot-rolled plate 1. In addition, since the area where local vibration occurs in the hot-rolled plate 1 may change, and the hot-rolled plate 1 is in continuous motion, when the detection mechanism moves, the determination of the abnormal point at the position before the movement can be cancelled, and the detection mechanism can return to this position after subsequent movement. The thickness measurement device for the hot-rolled plate 1 provided in this application solves the problem of unstable ray penetration path caused by local vibration of the hot-rolled plate 1 by controlling the detection mechanism 2 to deviate from the abnormal point. After the detection mechanism 2 moves to the area with less vibration, the effective thickness of the ray penetrating the hot-rolled plate 1 is more stable, the fluctuation of the ray intensity signal received by the detector decreases, the measurement error is greatly reduced, and the measurement data is closer to the actual thickness of the hot-rolled plate 1. Moreover, the design that the detection mechanism 2 can move along the width direction of the hot-rolled plate 1 enables the device to adapt to the thickness measurement of the hot-rolled plate 1 under different vibration conditions. No matter where the hot-rolled plate 1 vibrates during movement, the device can adjust the position of the detection mechanism 2 to maintain accurate measurement accuracy, improving the adaptability and reliability of the device in a complex production environment.

[0055] According to some embodiments of the present application, optionally, the control module controls the detection mechanism 2 to reciprocally move centered on the abnormal point in the width direction of the hot-rolled plate 1 based on the position of the abnormal point until the difference between the actual thickness dimensions of multiple hot-rolled plates 1 continuously measured by the detection mechanism 2 and the standard thickness dimension does not exceed the preset error value.

[0056] During use, the movable detection mechanism 2 can continuously move along the width direction of the hot-rolled plate 1 to obtain the actual thickness dimensions of various parts of the hot-rolled plate 1. When the difference between the measurement result of the actual thickness dimension of a certain part of the hot-rolled plate 1 obtained by the detection mechanism 2 and the standard thickness dimension of the hot-rolled plate 1 exceeds the preset error value, the control module will control the detection mechanism 2 to reciprocate along the width direction of the hot-rolled plate 1 with the abnormal point as the center until the difference between the actual thickness dimensions of multiple parts of the hot-rolled plate 1 continuously measured by the detection mechanism 2 and the standard thickness dimension does not exceed the preset error value. This facilitates the user to infer the contour, position, and size of the area with abnormal thickness based on the positions of multiple detected abnormal points, enabling the user to process the area with abnormal thickness of the hot-rolled plate 1 according to this information. Moreover, it can be determined whether there are problems such as deformation, damage, and position deviation in the processing equipment (such as rollers) of the hot-rolled plate 1 based on this information. The actual thickness dimension data of the hot-rolled plate 1 obtained in this way can not only determine the uniformity of the overall thickness distribution of the hot-rolled plate 1 but also accurately capture local thickness fluctuations or defects of the hot-rolled plate 1, providing a more complete data source for subsequent quality analysis and fundamentally reducing the risk of missed inspections.

[0057] According to some embodiments of the present application, optionally, as Figures 2 to 5 shown, at least one of the multiple detection mechanisms 2 faces the midline of the hot-rolled plate 1.

[0058] The camber of the hot-rolled plate 1 refers to the height difference between the central part and the edge part of the hot-rolled steel plate during the production process of the hot-rolled steel plate.

[0059] The detection mechanism 2 facing the midline of the hot-rolled plate 1 is fixed on the frame 3, and the other detection mechanisms 2 can be movably arranged on the frame 3.

[0060] At least one of the multiple detection mechanisms 2 faces the midline of the hot-rolled plate 1 to stably obtain the actual thickness dimension data passing through the central part of the hot-rolled plate 1 (i.e., the thickest part of the hot-rolled plate 1). The detection mechanisms 2 other than the detection mechanism 2 facing the midline can move according to the width dimension of the hot-rolled plate 1 to be measured, so as to ensure that the measurement position can approach the edge of the hot-rolled plate 1 with different width dimensions, thereby obtaining the thickness dimension information of the edge part of the hot-rolled plate 1 with different width dimensions, improving the applicable range of the hot-rolled plate thickness measuring equipment provided by the present application, and improving the accuracy of the finally measured camber of the hot-rolled plate 1.

[0061] According to some embodiments of the present application, optionally, as Figures 1 to 6As shown, it further includes a frame 3; the detection mechanism 22 is disposed on the frame 33; a gear 3030 and a driving member are provided inside the frame 33. The detection assembly 2121 of the detection mechanism 22 and the radiation source 2020 that are offset from the center line of the hot-rolled plate 11 are both provided with racks 2222 for meshing with the gear 3030; the driving member drives the gear 3030 to rotate reciprocally to drive the detection mechanism 22 to reciprocally move along the width direction of the hot-rolled plate 11 The frame 3 mentioned in this application can be a C-shaped frame, made of high-strength alloy material, capable of withstanding high temperature, high humidity and strong vibration environments. The structural height is 2.7m, suitable for measuring steel plates with a width of 0-6m. It is provided with a shielding layer to prevent γ-ray leakage and ensure operation safety.

[0062] The gears 30 on the detection assembly 21 and the radiation source 20 have the same size.

[0063] The racks 22 on the detection assembly 21 rotate synchronously with the racks 22 on the radiation source 20. The gear 30 rotates reciprocally to drive the detection mechanism 2 to reciprocally move along the width direction of the hot-rolled plate 1. The meshing of the gear 30 and rack 22 structure has high precision, capable of realizing precise motion control, enabling the detection assembly 21 and the radiation source 20 to always face each other, avoiding the increase in the path through which the γ-ray passes through the hot-rolled plate 1 due to the position offset between the two, which affects the actual energy intensity measured by the detection assembly 21 and improving the accuracy of the measurement result; in addition, the gear 30 and the rack 22 transmit force and motion through mutual meshing, so their motion is relatively stable, without phenomena such as impact and vibration, thereby reducing the risk of relative position offset of the detection assembly 21 and the radiation source 20 caused by factors such as vibration during movement.

[0064] According to some embodiments of the present application, optionally, as Figures 4 to 5 、 Figures 7 to 8 shown, a limiting groove 31 is further provided inside the frame 3; the rack 22 is disposed inside the limiting groove 31; the limiting groove 31 is used to limit the moving direction of the rack 22 from deviating from the width direction of the hot-rolled plate 1.

[0065] When the detection assembly moves along the width direction of the hot-rolled plate 1, it will move while adhering to the surface of the frame 3. When the surface of the frame 3 is not flat enough or the vibration in the processing environment is relatively intense and transmitted to the frame 3, the moving path of the detection assembly may be affected, causing the lens of the detection assembly for receiving γ-rays to deflect, resulting in the length direction of the ray with the strongest energy received by the detection assembly deviating from the thickness direction of the hot-rolled plate 1, thus affecting the measurement structure. To solve this problem, a limiting groove 31 is provided inside the frame 3, and the rack 22 is movably disposed in the limiting groove 31, so that the limiting groove 31 restricts (mainly the rack 22 connecting the detection assembly) the moving direction of the rack 22, thereby avoiding the moving direction of the rack 22 from deviating from the width direction of the hot-rolled plate 1 and ensuring the accuracy of the measurement structure.

[0066] According to some embodiments of the present application, optionally, as Figures 4 to 5 , Figures 7 to 8 shown, the detection assembly 21 of the detection mechanism 2 that is offset from the center line of the hot-rolled plate 1 and the radiation source 20 are both provided with a positioning box 23 and an elastic member 24; the rack 22 is vertically movably arranged inside the positioning box 23; the elastic member 24 is arranged between the first wall 230 of the positioning box 23 and the rack 22; the elastic member 24 pushes the rack 22 to abut against and mesh with the gear 30; the inner wall of the limiting groove 31 fits with the outer wall surface of the positioning box 23; the surface of the limiting groove 31 facing the opening of the positioning box 23 is the second wall 310; the rack 22 contacts the second wall 310.

[0067] The elastic member 24 can be but is not limited to a spring, a spring sheet, a highly elastic rubber, etc. The two opposite ends of the rack 22 in the length direction are in contact with the two opposite inner wall surfaces of the positioning box 23, so as to prevent the rack 22 from deviating from the lifting direction.

[0068] The elastic member 24 inside the positioning box 23 pushes the rack 22 to abut against and mesh with the gear 30, improving the stability of the meshing state between the gear 30 and the rack 22, thereby preventing the situation where the positions of the detection assembly and the radiation source 20 in a detection structure are offset due to slipping or the like; the elastic member 24 is arranged inside the positioning box and moves synchronously with the rack 22, preventing the contact position between the elastic member 24 and the rack 22 from changing, which may cause wear of the elastic member 24; the inner wall of the limiting groove 31 fits with the outer wall surface of the positioning box 23, enabling the limiting groove 31 to limit the moving direction of the rack 22 by restricting the moving direction of the positioning box 23; in addition, since the contact position between the gear 30 and the rack 22 changes as the rack 22 moves, a part of the rack 22 farther from the gear 30 may flip in the direction away from the first wall 230 under the push of the elastic member 24, and the rack 22 contacts the second wall 310. When there is a tendency for a part of the rack 22 to flip, the contact between the rack 22 and the second wall 310 becomes abutment, thereby restricting the flipping of the rack 22 and preventing the length direction of the rack 22 from deviating from the width direction of the hot-rolled plate 1.

[0069] According to some embodiments of the present application, optionally, as Figures 5 to 6 shown, the detection assembly 21 includes a plurality of detection heads 210; the plurality of detection heads 210 are arranged along the length direction of the hot-rolled plate 1; the detection heads 210 are used to measure the current energy intensity of the rays passing through the hot-rolled plate 1; the actual energy intensity is determined based on the average value of the plurality of current energy intensities measured by the plurality of detection heads 210 of the detection assembly 21.

[0070] The number of the plurality of detection heads 210 can be three, four, five, six, seven, eight, nine, ten or even more.

[0071] Determine the actual energy intensity of the hot-rolled plate 1 in the measurement according to the average value of the current energy intensities of the gamma rays measured by multiple detectors 210, avoiding a large error between the measurement result and the actual result caused by factors such as floating dust in the air, damage of a certain detector 210 due to high temperature, and position offset caused by vibration, and improving the measurement accuracy.

[0072] According to some embodiments of the present application, optionally, as Figure 6 shown, the orthographic projection of the multiple detectors 210 along the thickness direction of the hot-rolled plate 1 does not exceed the radiation source 20.

[0073] Multiple openings can be provided at the top of the source chamber constituting the radiation source 20, and the multiple openings correspond to the multiple detectors 210 one by one.

[0074] The orthographic projection of the multiple detectors 210 along the thickness direction of the hot-rolled plate 1 does not exceed the radiation source 20, so that the gamma rays emitted by the radiation source 20 can be projected onto the detectors 210 along the thickness direction of the hot-rolled plate 1, avoiding the situation that the increased absorbed energy due to the increased path of the gamma rays moving in the hot-rolled plate 1 affects the current energy intensity measured by the detectors 210.

[0075] According to some embodiments of the present application, optionally, as Figures 1 to 5 shown, it further includes a temperature control mechanism 4; the temperature control mechanism 4 covers the detection mechanism 2, and the temperature control mechanism 4 is used to control the temperature of the detection mechanism 2.

[0076] The temperature control system can control the temperature in the processing environment through air, or can also control the temperature in the processing environment through heat-absorbing materials (or heat-releasing materials).

[0077] The temperature control mechanism 4 covers the detection mechanism 2, and the temperature control mechanism 4 can control the temperature of the detection mechanism 2, avoiding damage to the detection mechanism 2 under the influence of high temperature and also avoiding the influence of the environmental temperature on the detection accuracy; in addition, the temperature control mechanism 4 can control the temperature of the hot-rolled plate 1 passing between the detection assembly 21 and the radiation source 20 (mainly for cooling), avoiding the expansion or contraction of the hot-rolled plate 1 caused by the overall or local overheating or overcooling of the hot-rolled plate 1, affecting the result measured by the hot-rolled plate thickness measuring device provided by the present application, resulting in the deviation of the judgment of the subsequent processing process of the hot-rolled plate 1 from the actual situation, and making the size of the final finished hot-rolled plate 1 not meet the requirements.

[0078] According to some embodiments of the present application, optionally, a flow channel for fluid to pass through is provided inside the temperature control mechanism 4.

[0079] The fluid mentioned in the present application can be water, ethanol, oil, etc. A part of the temperature control mechanism 4 can be arranged around the detection component 21, and another part of the temperature control mechanism 4 can be arranged close to the radiation source 20. The temperature control mechanism 4 arranged close to the radiation source 20 can be located at one end of the detection area where the hot-rolled plate 1 enters the detection mechanism 2, and the temperature of the hot-rolled plate 1 can be adjusted before its thickness is measured.

[0080] The temperature control mechanism 4 can be connected to the frame 3 In actual applications, the temperature control mechanism 4 mentioned in this application is mostly used to cool down the detection mechanism 2 and the processing environment. This application will be described by taking cooling as an example.

[0081] A flow channel for the passage of fluid is arranged inside the temperature control mechanism 4. The detection mechanism 2 and the hot-rolled plate 1 passing through the detection area of the detection mechanism 2 are cooled by circulating coolant. The coolant can help dissipate heat relatively quickly and is not easily affected by the radiation of the radiation source 20; the hot-rolled plate thickness measuring device provided in this application replaces the step of watering the steel plate to cool it down during the existing steel plate rolling process, avoiding the situation that a large amount of high-temperature steam accumulates between the detection component 21 and the radiation source 20 and affects the energy of the rays, and improving the accuracy of the measurement results.

[0082] According to some embodiments of the present application, optionally, the temperature control mechanism 4 further includes a temperature sensor for detecting the temperature of the fluid in the flow channel; the control module controls the flow rate of the fluid to increase or decrease based on the temperature of the fluid in the flow channel measured by the temperature sensor.

[0083] The temperature sensor can monitor the coolant temperature in real time, determine the flow rate of the coolant in the flow channel through the detection result, and the control module can control the power of the power equipment (such as input / output pumps, etc.) that drives the fluid into the flow channel to control the flow rate of the fluid in the flow channel. When the temperature of the fluid in the flow channel is relatively high, the control module controls the power of the power equipment to rise, so that the heated fluid can leave the flow channel faster and the cooler fluid can be replenished into the flow channel faster to ensure the stability of the detection mechanism 2 and the processing environment; when the temperature of the fluid in the flow channel is relatively low, the control module controls the power of the power equipment to drop. On the premise of not affecting the cooling effect of the fluid in the flow channel on the measurement environment, the liquid in the flow channel can pass through the flow channel more slowly, reducing the energy loss of the fluid and the power equipment, and saving energy and protecting the environment.

[0084] According to some embodiments of the present application, optionally, a shielding layer is further arranged outside the detection mechanism 2.

[0085] Shielding layers can be arranged outside devices such as the frame 3 and the temperature control mechanism 4.

[0086] The shielding layer can be a lead-tungsten composite structure.

[0087] A shielding layer is also provided outside the detection mechanism 2, which can block the γ-rays emitted by the radiation source 20, reduce the impact of the rays of the radiation source 20 on the equipment other than the detection component 21, improve the safety of the detection environment, and also delay the aging and damage rate of the detection component 21 under the action of radioactive rays, and improve the service life of the detection component 21.

[0088] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A hot-rolled plate thickness measuring device for detecting the thickness of the hot-rolled plate moving along its own length direction, characterized in that, Including: A control module and a plurality of detection mechanisms; The detection mechanism includes a radiation source and a detection component; The detection component is disposed opposite to the radiation source along the thickness direction of the hot-rolled plate, and a gap for the hot-rolled plate to pass through is reserved therebetween; The detection mechanism is used to measure the actual thickness dimension of the hot-rolled plate at its own location; A plurality of the detection mechanisms are arranged in sequence along the width direction of the hot-rolled plate; At least some of the plurality of detection mechanisms can reciprocally move along the width direction of the hot-rolled plate; The control module controls a point where the difference between the actual thickness dimension detected by each detection mechanism and the standard thickness dimension exceeds a preset error value as an abnormal point; The control module controls the detection mechanism to stop or move in the width direction of the hot-rolled plate based on the variance of n actual thickness dimensions of the hot-rolled plate continuously measured by the detection mechanism at the same position.

2. The thickness measuring device for hot-rolled plates according to claim 1, characterized in that The control module controls the detection mechanism to move in the width direction of the hot-rolled plate to deviate from the abnormal point based on the position of the abnormal point.

3. The thickness measuring device for hot-rolled plates according to claim 1, characterized in that The control module controls the detection mechanism to reciprocally move centered on the abnormal point in the width direction of the hot-rolled plate until the difference between the actual thickness dimensions of multiple parts of the hot-rolled plate continuously measured by the detection mechanism and the standard thickness dimension does not exceed the preset error value.

4. The thickness measuring device for hot-rolled plates according to claim 1, characterized in that, At least one of the plurality of detection mechanisms is aligned with the center line of the hot-rolled plate.

5. The thickness measuring device for hot-rolled plates according to claim 2, characterized in that, It further includes a frame; The detection mechanism is disposed on the frame; A gear and a driving member are arranged inside the frame. The detection components and the radiation sources of the detection mechanisms offset from the center line of the hot-rolled plate are both provided with racks for meshing with the gear; The driving member drives the gear to rotate reciprocally to drive the detection mechanism to reciprocally move along the width direction of the hot-rolled plate.

6. The thickness measuring device for hot-rolled plates according to claim 3, characterized in that, A limiting groove is further arranged inside the frame; The rack is arranged inside the limiting groove; The limiting groove is used to limit the moving direction of the rack from deviating from the width direction of the hot-rolled plate.

7. The thickness measuring device for hot-rolled plates according to claim 4, characterized in that The detection components and the radiation sources of the detection mechanisms offset from the center line of the hot-rolled plate are both provided with positioning boxes and elastic members; The rack is arranged in the positioning box in a liftable manner; The elastic member is arranged between the first wall of the positioning box and the rack; The elastic member pushes the rack to abut against and mesh with the gear; The inner wall of the limiting groove fits with the outer wall surface of the positioning box; The surface of the limiting groove facing the opening of the positioning box is the second wall; The rack contacts the second wall.

8. The thickness measuring device for hot-rolled plates according to claim 1, characterized in that, It further includes a temperature control mechanism; The temperature control mechanism covers the detection mechanism, and the temperature control mechanism is used to control the temperature of the detection mechanism.

9. The thickness measuring device for hot-rolled plates according to claim 8, characterized in that, A flow channel for the fluid to pass through is arranged inside the temperature control mechanism; 10. The thickness measuring device for hot-rolled plates according to claim 9, characterized in that, The temperature control mechanism further includes a temperature sensor, and the temperature sensor is used to detect the temperature of the fluid in the flow channel; The control module controls the flow rate of the fluid to increase or decrease based on the temperature of the fluid in the flow channel measured by the temperature sensor.

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