Wall thickness detection device

Abstract

The embodiment of the invention relates to the technical field of equipment thickness measurement, and provides a wall thickness detection device which comprises an ultrasonic detection head used for measuring the thickness of an outer side wall; the cover body is provided with a detection surface used for being attached to the outer side wall, a first containing cavity used for installing the detection head and a second containing cavity used for containing the coupling gel are formed in the cover body, the second containing cavity is annular and located on the periphery of the first containing cavity, and the first containing cavity is provided with a first opening located in the detection surface; the detection end of the ultrasonic detection head corresponds to the first opening, the second containing cavity is provided with a second opening which is located in the detection face and surrounds the first opening, and the second opening is used for coating the outer side wall with coupling gel; and the liquid supplementing assembly communicates with the second containing cavity and is used for injecting coupling gel into the second containing cavity. According to the technical scheme, the technical problems of poor thickness measurement effect and low efficiency in the prior art are solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of equipment thickness measurement, in particular, to a wall thickness detection device. BACKGROUND

[0002] Paper drying cylinder is a special equipment widely used in papermaking industry, and is a key equipment in papermaking industry, which is used for drying paper. The material of paper drying cylinder is generally gray cast iron. Gray cast iron belongs to brittle material, and the material performance is brittle. Casting defects are easy to occur in the casting process, and the internal casting structure is looser than steel material, and the grain is coarser, and there is a large amount of flaky graphite, so that the cast iron special equipment is brittle and easy to break compared with the steel special equipment. After the cast iron special equipment fails, it is often broken into many fragments, which often causes greater harm to personnel life and property. The drying cylinder heats the outer surface through internal steam, and then transmits heat to the contacted paper through conduction. Due to the existence of high temperature and high humidity in the working environment, the wall thickness of the drying cylinder will be thinned over time, which may affect its service life and cause safety problems. Therefore, accurate measurement of the wall thickness of the drying cylinder is very important to ensure the safe operation of the equipment.

[0003] At present, there is a lack of reliable inspection and thickness measurement inspection technology, instrument, method and standard for drying cylinder. In view of the poor effect of many detection methods for drying cylinder, there is no effective and simple inspection method at home and abroad. Although the existing technology adopts ultrasonic flaw detection to detect the wall thickness of the drying cylinder, the actual use effect is not good, especially the coupling gel needs to be coated manually during measurement, which leads to low measurement efficiency. SUMMARY

[0004] In order to overcome the above defects, the embodiments of the present disclosure provide a wall thickness detection device, which solves the technical problems of poor thickness measurement effect and low efficiency of the drying cylinder in the prior art.

[0005] According to one aspect, at least one embodiment of the present disclosure provides a wall thickness detection device, comprising: an ultrasonic detection head, the ultrasonic detection head is used for measuring the thickness of the outer side wall; a cover body, the cover body has a detection surface for fitting the outer side wall, the cover body has a first accommodating cavity for mounting the detection head and a second accommodating cavity for accommodating coupling gel, the second accommodating cavity is annular and located at the outer periphery of the first accommodating cavity, the first accommodating cavity has a first opening located in the detection surface, the detection end of the ultrasonic detection head corresponds to the first opening, the second accommodating cavity has a second opening located in the detection surface and arranged around the first opening, and the second opening is used for coating the coupling gel on the outer side wall; a liquid supplement assembly, the liquid supplement assembly is in communication with the second accommodating cavity, and is used for injecting the coupling gel into the second accommodating cavity.

[0006] For example, at least one embodiment of this disclosure provides a wall thickness detection device, wherein the cover further has a third receiving cavity, the third receiving cavity having a third opening located on the detection surface; The detection device also includes a negative pressure mechanism, which is connected to the third receiving cavity and sucks away the coupling gel on the outer wall through the third opening.

[0007] For example, at least one embodiment of this disclosure provides a wall thickness detection device, wherein the detection surface is provided with a flexible contact portion, the flexible contact portion being used to tightly fit against the outer wall.

[0008] For example, at least one embodiment of this disclosure provides a wall thickness detection device, which further includes: A slowing plate is slidably disposed within the second receiving cavity to slow down the discharge of coupling gel from the second receiving cavity through the second opening; A first elastic element, one end of which acts on the buffer plate and the other end of which acts on the cover, is used to pull the buffer plate toward the bottom of the cover; A uniform distribution plate is disposed at the second opening. The uniform distribution plate has adhesive outlet holes that extend through the thickness direction and are uniformly distributed in the uniform distribution plate. The uniform distribution plate is used to allow the coupling gel to flow out uniformly.

[0009] For example, at least one embodiment of this disclosure provides a wall thickness detection device, which further includes: An adjusting plate having a through hole extending along the thickness direction, the through hole corresponding to the position of the glue outlet hole, the adjusting plate being able to rotate circumferentially along the uniform distribution plate to adjust the overlap area between the through hole and the glue outlet hole.

[0010] For example, at least one embodiment of this disclosure provides a wall thickness detection device. The cover also has a communication port connecting the second receiving cavity and the third receiving cavity, the communication port and the second opening being located on both sides of the buffer plate; the buffer plate has a plurality of through holes for coupling the passage of gel; It also includes a uniform dispersing component, which is disposed in the third receiving cavity for uniformly dispersing the coupling gel in the third receiving cavity.

[0011] For example, at least one embodiment of this disclosure provides a wall thickness detection device, wherein the material leveling component includes: A spiral uniform material sheet is rotatably disposed in the third receiving cavity. There are multiple spiral uniform material sheets, which are distributed circumferentially along the third opening, for uniformly dispersing the coupling gel in the third receiving cavity. The walking drive wheel is rotatably mounted outside the cover and is connected to the spiral material distribution plate for driving and rotating on the outer side wall, thereby driving the spiral material distribution plate to rotate.

[0012] For example, at least one embodiment of this disclosure provides a wall thickness detection device, wherein the negative pressure mechanism is a negative pressure suction tube, the negative pressure suction tube is connected to the third receiving cavity, and the material leveling assembly further includes: An annular suction plate, which is located at the third opening, has several suction holes for drawing in the coupling gel under the suction force of the negative pressure suction tube and delivering it to the third receiving cavity.

[0013] For example, at least one embodiment of this disclosure provides a wall thickness detection device, wherein the liquid replenishment component is disposed outside the cover and communicates with the second receiving cavity for replenishing coupling gel into the second receiving cavity, the liquid replenishment component comprising: A material container, disposed outside the cover, is used to contain the coupling gel; A connecting pipe, one end of which is connected to the material tank, and the other end of which is connected to the second receiving cavity; A peristaltic pump, which is mounted on the connecting tube, is used to peristally replenish the coupling gel.

[0014] For example, at least one embodiment of this disclosure provides a wall thickness detection device, which further includes: The second elastic element has one end acting on the buffer plate and the other end acting on the uniform distribution plate or the cover, providing a force to the buffer plate away from the uniform distribution plate, and working together with the first elastic element to make the buffer plate oscillate back and forth.

[0015] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the coupling gel is automatically coated and replenished through the second receiving cavity and the liquid replenishment component inside the cover, eliminating the need for manual coating, which greatly saves measurement time and improves measurement efficiency.

[0016] The good fit between the detection surface of the cover and the outer surface of the outer wall, as well as the uniform coating of the coupling gel, reduces the impact of air gaps and poor coupling on ultrasonic signal transmission, improves the accuracy of ultrasonic detection head measurements, and enables more accurate acquisition of the wall thickness data of the outer wall.

[0017] The liquid replenishment component enables the storage and replenishment of coupling gel, while the design of the cover facilitates its fit with the outer surface of the outer wall. The entire measurement process is simple and convenient, reducing the workload of operators. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the wall thickness detection device from one perspective in one embodiment of the present disclosure; Figure 2 for Figure 1 Another structural schematic diagram of the wall thickness detection device in the embodiment; Figure 3 for Figure 1 A top view of the wall thickness detection device in the embodiment; Figure 4 for Figure 3 Schematic diagram of the sectional structure of the middle AA section; Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of the middle BB; Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure of the middle CC section; Figure 7 for Figure 1 A side view of the wall thickness detection device in the embodiment; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of the middle DD; In the diagram: ultrasonic detection head 100, cover 200, first receiving cavity 201, first opening 2011, second receiving cavity 202, second opening 2021, third receiving cavity 203, third opening 2031, connecting port 204, buffer plate 300, through hole 301, first elastic element 400, uniform distribution plate 500, adjustment plate 600, uniform material assembly 700, spiral uniform material plate 701, walking drive wheel 702, annular suction plate 703, suction hole 7031, liquid replenishment assembly 800, connecting pipe 801, second elastic element 900, negative pressure suction tube 1000. Detailed Implementation

[0020] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0023] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1 to 8The diagram illustrates a wall thickness measuring device for measuring the thickness of the outer wall of a cast iron drying cylinder, specifically the outer wall of the cylinder. The device includes an ultrasonic testing head 100, a housing 200, and a liquid replenishment assembly 800. The ultrasonic testing head 100 measures the thickness of the outer wall of the cast iron drying cylinder. The housing 200 has a testing surface for conforming to the outer wall of the cast iron drying cylinder. The housing 200 contains a first receiving cavity 201 for mounting the testing head 100 and a second receiving cavity 202 for receiving coupling gel. Cavity 202 is annular and located on the outer periphery of first receiving cavity 201. First receiving cavity 201 has a first opening 2011 located in the detection surface. The detection end of ultrasonic detection head 100 corresponds to the first opening 2011. Second receiving cavity 202 has a second opening 2021 located in the detection surface and arranged around the first opening. The second opening 2021 is used to coat the outer wall of the cast iron drying cylinder with coupling gel. Liquid replenishment component 800 is connected to second receiving cavity 202 and is used to inject coupling gel into second receiving cavity 202.

[0027] For example, an ultrasonic thickness gauge probe is selected as the ultrasonic detection head 100. The detection end of the ultrasonic detection head 100 has a planar structure to ensure good contact with the outer wall of the cast iron drying cylinder and to ensure stable transmission of ultrasonic signals.

[0028] The ultrasonic testing head 100 is connected to the external ultrasonic thickness gauge host via a dedicated cable with a shielded layer. The shielding layer effectively prevents external electromagnetic interference and ensures stable transmission of the measurement signal. The ultrasonic testing head 100 is fixed within the first receiving cavity 201 to prevent it from shaking during measurement and affecting the measurement results.

[0029] The cover 200 is cylindrical in shape, and its design is adapted to the curvature of the outer surface of the cast iron drying cylinder for better fit. The end of the cover 200 closest to the outer surface of the cast iron drying cylinder can be designed as a curved surface that fits into the outer surface of the cast iron drying cylinder, ensuring that the cover 200 and the outer surface of the drying cylinder can be in close contact during measurement, reducing the influence of air gaps on the measurement.

[0030] The first receiving cavity 201 is located at the center of the cover 200, and is cylindrical in shape, just large enough to accommodate the main body of the ultrasonic testing head 100. The first opening 2011 is located at the center of the testing surface, and has the same diameter as the testing end of the ultrasonic testing head 100, ensuring that the testing end of the ultrasonic testing head 100 can accurately correspond to the first opening 2011, thereby enabling the measurement of the drying cylinder wall thickness. The second receiving cavity 202 is an annular structure, arranged around the first receiving cavity 201, and the second opening 2021 is distributed in a ring around the first opening 2011, used to uniformly coat the outer wall of the cast iron drying cylinder with coupling gel. This ensures that the coupling gel can flow smoothly out from the second opening 2021.

[0031] The replenishment component 800 is capable of storing coupling gel and being continuously pumped into the second receiving cavity 202 to continuously replenish the coupling gel to the second receiving cavity 202.

[0032] The ultrasonic testing head 100 utilizes the difference in the propagation speed of ultrasonic waves in different media and the reflection characteristics at the medium interface to measure the wall thickness of the cast iron drying cylinder. When the ultrasonic waves emitted by the ultrasonic testing head encounter the inner and outer walls of the cast iron drying cylinder, reflected waves are generated respectively. By measuring the time interval between the two reflected waves and combining it with the propagation speed of ultrasonic waves in the cast iron, the wall thickness of the drying cylinder can be calculated.

[0033] The second receiving cavity 202 within the cover 200 stores the coupling gel. Under gravity, the coupling gel naturally flows to the second opening 2021 and is evenly coated onto the outer wall of the cast iron drying cylinder from the second opening 2021. The replenishment component 800 communicates with the second receiving cavity 202. When the coupling gel in the second receiving cavity 202 is insufficient, it can replenish the coupling gel into the second receiving cavity 202, ensuring a continuous supply of coupling gel and guaranteeing smooth measurement.

[0034] The cast iron drying cylinder can continuously rotate under drive. When measuring the outer wall thickness of the cast iron drying cylinder, the detection surface of the cover 200 is tightly fitted to the outer surface of the cast iron drying cylinder, ensuring that there is no obvious air gap between the cover 200 and the outer surface of the drying cylinder. During the fitting process, the cover 200 can be gently pressed to better adapt the detection surface to the curvature of the drying cylinder. Because the detection surface of the cover 200 matches the curvature of the outer surface of the drying cylinder, the fitting can be quick and accurate.

[0035] After the cover 200 is attached, the coupling gel in the second receiving cavity 202 flows out from the second opening 2021 under the action of gravity and is evenly coated on the outer wall of the cast iron drying cylinder. After the coupling gel is evenly coated, the ultrasonic detection head 100 starts working, emitting ultrasonic waves towards the outer wall of the drying cylinder and receiving the reflected waves. The main unit of the ultrasonic thickness gauge calculates the wall thickness of the drying cylinder based on the time interval of the reflected waves. During the measurement process, the coupling gel in the second receiving cavity 202 can be automatically and continuously replenished to ensure the continuity of the measurement. As the cast iron drying cylinder continues to rotate, the ultrasonic detection head 100 can measure the wall thickness data of one circumference of the cast iron drying cylinder. Then, by moving the ultrasonic detection head 100, the wall thickness data of the entire side wall of the cast iron drying cylinder can be measured.

[0036] The coupling gel is automatically coated and replenished through the second receiving cavity 202 inside the cover 200 and the liquid replenishment component 800, eliminating the need for manual coating, which greatly saves measurement time and improves measurement efficiency.

[0037] The good fit between the detection surface of the cover 200 and the outer surface of the cast iron drying cylinder, as well as the uniform coating of the coupling gel, reduces the impact of air gaps and poor coupling on ultrasonic signal transmission, improves the accuracy of the ultrasonic detection head 100 measurement, and enables more accurate acquisition of the wall thickness data of the cast iron drying cylinder.

[0038] The liquid replenishment component 800 enables the storage and replenishment of coupling gel, while the design of the cover 200 facilitates its fit with the outer surface of the cast iron drying cylinder. The entire measurement process is simple and convenient, reducing the workload of operators.

[0039] In some examples, the cover 200 also has a third receiving cavity 203 with a third opening 2031 located on the detection surface. The detection device also includes a negative pressure mechanism that communicates with the third receiving cavity 203 and draws away the coupling gel on the outer wall of the cast iron drying cylinder through the third opening 2031.

[0040] For example, such as Figures 4 to 6 As shown, the third receiving cavity 203 is located inside the cover 200, adjacent to the second receiving cavity 202 and located on its outer side. It has a ring structure. The third opening 2031 is also ring-shaped and located on the detection surface.

[0041] The negative pressure mechanism is mainly an air extraction device, which can extract air from the three-accommodation chamber 203, thereby allowing the third-accommodation chamber 203 to absorb the excess coupling gel from the outer wall of the cast iron drying cylinder.

[0042] After the wall thickness measurement at one location on the outer wall of the cast iron drying cylinder is completed, the coupling gel becomes residual coupling gel, which needs to be collected. At this time, the negative pressure mechanism generates negative pressure and transmits it to the third receiving cavity 203. Under the action of negative pressure, the coupling gel remaining on the cylinder wall of the cast iron drying cylinder is sucked into the third receiving cavity 203 through the third opening 2031, thus completing the removal of the coupling gel.

[0043] The third receiving cavity 203 works in conjunction with the second receiving cavity 202 and the ultrasonic testing head 100. Before measurement, the second receiving cavity 202 is responsible for coating the outer wall of the cast iron drying cylinder with coupling gel to ensure the measurement accuracy of the ultrasonic testing head 100. After measurement, the third receiving cavity 203 recovers the coupling gel under the action of the negative pressure mechanism, realizing the integrated operation of coating and recovery, improving the convenience and efficiency of measurement, and avoiding the potential impact of coupling gel residue on the drying cylinder.

[0044] The negative pressure mechanism enables automatic recovery of the coupling gel, eliminating the need for manual cleaning, saving measurement time, and improving overall measurement efficiency. Simultaneously, the integrated coating and recovery design makes operation more convenient and reduces operator workload. Timely recovery of the coupling gel prevents residue on the cast iron drying cylinder surface, preventing contamination or corrosion, helping to maintain cylinder surface cleanliness, and extending cylinder lifespan. Reducing coupling gel residue in the work area improves the working environment, lowers safety risks such as slips caused by coupling gel residue, and also reduces potential impact on other equipment and personnel.

[0045] In some examples, the detection surface is provided with a flexible contact portion for close contact with the outer wall of the cast iron drying cylinder.

[0046] For example, the flexible contact part of the detection surface can be made of silicone rubber. Silicone rubber has good flexibility, elasticity, and resistance to high and low temperatures and aging. It can adapt to the high temperature and high humidity environment around the cast iron drying cylinder, and will not damage the surface of the cast iron drying cylinder.

[0047] The flexible contact part is ring-shaped and surrounds the edge of the detection surface. The ring-shaped design can evenly distribute the contact pressure between the cover 200 and the cast iron drying cylinder, ensuring that the entire detection surface is in close contact with the drying cylinder wall.

[0048] The flexible contact portion, as part of the detection surface of the cover 200, is attached to the cover 200. It not only enhances the fit between the cover 200 and the cast iron drying cylinder but also provides some protection for the cover 200, reducing damage caused by friction with the drying cylinder surface. Simultaneously, the presence of the flexible contact portion does not affect the normal operation of the second receiving cavity 202, the third receiving cavity 203, or the ultrasonic detection head 100, ensuring the smooth application and recovery of the coupling gel and the measurement of wall thickness.

[0049] The excellent fit of the flexible contact portion provides a stable measurement environment for the ultrasonic testing head 100. It effectively reduces interference from air gaps on ultrasonic signal transmission, making the ultrasonic signals transmitted and received by the ultrasonic testing head 100 more stable, thereby improving measurement accuracy. Simultaneously, during the measurement process, the elasticity of the flexible contact portion can buffer the stress caused by unevenness on the drying cylinder surface, protecting the ultrasonic testing head 100 from damage.

[0050] The flexibility and elasticity of the flexible contact part allow it to adapt to minute unevenness on the surface of the cast iron drying cylinder, conforming tightly to the cylinder wall through its own deformation. Because the flexible contact part effectively reduces air gaps, the energy loss of the ultrasonic signal is reduced during its journey from the ultrasonic detection head 100 to the drying cylinder wall and back, resulting in a more stable signal. This helps the ultrasonic thickness gauge to more accurately measure the propagation time of ultrasonic waves within the drying cylinder wall, thereby precisely calculating the cylinder wall thickness.

[0051] In some examples, such as Figures 4 to 6 , Figure 8 As shown, it also includes a buffer plate 300, a first elastic element 400, and a uniform distribution plate 500. The buffer plate 300 is slidably disposed in the second receiving cavity 202 to uniformly disperse the coupling gel in the second receiving cavity 202. One end of the first elastic element 400 acts on the buffer plate 300 and the other end acts on the cover 200, providing a force to pull the buffer plate 300 away from the second opening 2021, which is used to pull the buffer plate (300) towards the bottom of the cover (200), and also makes the coupling gel flowing to the second opening 2021 more uniformly distributed in the circumferential direction of the second receiving cavity 202. The uniform distribution plate 500 is disposed at the second opening 2021 and has a glue outlet hole that runs through the thickness direction. The glue outlet hole is uniformly distributed in the uniform distribution plate 500 and is used to make the coupling gel flow out uniformly.

[0052] For example, the buffer plate 300 can be a circular plate structure with a diameter slightly smaller than the inner diameter of the second receiving cavity 202, to ensure that the buffer plate 300 can slide smoothly within the second receiving cavity 202.

[0053] The first elastic element 400 can be a compression spring, which can provide sufficient and stable elastic force so that the deceleration plate 300 always tends to move away from the second opening 2021. The first elastic element 400 is installed in the second receiving cavity 202, with one end abutting against the deceleration plate 300 and the other end fixed to the bottom of the second receiving cavity 202 of the cover 200 near the second opening 2021.

[0054] The uniform distribution plate 500 is a thin, circular plate with good corrosion resistance, adaptable to the chemical properties of the coupling gel. The diameter of the uniform distribution plate 500 is the same as the outer diameter of the second opening 2021, allowing it to be installed precisely at the second opening 2021, ensuring a secure installation. The dispensing holes are circular through holes, uniformly distributed in a matrix pattern on the uniform distribution plate 500. The density ensures that the coupling gel flows out evenly as it passes through the uniform distribution plate 500, forming a uniform coating on the cast iron drying cylinder wall.

[0055] During the coupling gel filling process, the gel is injected from the bottom of the second receiving cavity 202, where the bottom of the second receiving cavity 202 refers to the position of the second receiving cavity 202 away from the second opening 2021. The buffer plate 300 is movable within the second receiving cavity 202 and may have an opening or channel. The coupling gel can pass through the buffer plate 300 through this opening or channel. The buffer plate 300 acts as a barrier for the coupling gel, reducing its flow rate and ensuring that the coupling gel first fills the space between the buffer plate 300 and the bottom of the second receiving cavity 202, reducing air bubbles in the coupling gel. It also prevents excessive discharge from the second opening 2021, which could affect the coupling gel coating effect.

[0056] Optionally, in the second receiving cavity 202, the space between the buffer plate 300 and the second opening 2021 can be provided with absorbent cotton that can absorb and release the coupling gel, thereby further ensuring that the coupling gel is not discharged in excess and ensuring that the amount of coating is appropriate.

[0057] Meanwhile, the relatively slow sliding speed of the buffer plate 300 reduces the flow rate of the coupling gel towards the second opening 2021, preventing gel accumulation at the outlet or uneven distribution due to excessive flow rate. This dual effect of uniform and buffering ensures that the coupling gel exiting from the second opening 2021 can evenly cover the detection area of ​​the cast iron drying cylinder, improving detection accuracy.

[0058] Furthermore, during the flow of the coupling gel, a thrust is applied to the buffer plate 300 toward the second opening 2021. The first elastic element 400 provides a traction force to the buffer plate 300 away from the second opening 2021. On the one hand, this traction force can balance the thrust and prevent the buffer plate 300 from protruding from the second opening 2021; on the other hand, the multiple first elastic elements 400 are evenly distributed circumferentially along the second receiving cavity 202, which can keep the buffer plate 300 in a position approximately parallel to the second opening 2021. When there is a large amount of coupling gel in the second receiving cavity 202 on the side of the slowing plate 300 away from the second opening 2021, the coupling gel exerts a large force on the slowing plate 300, the first elastic element 400 is stretched, and the spring traction force restricts the slowing plate 300 from continuing to move towards the second opening 2021. The resistance of the slowing plate 300 to the coupling gel increases, thereby preventing excessive coupling gel from flowing from the second opening 2021 to the cylinder wall of the cast iron drying cylinder. When the amount of coupling gel in the second receiving cavity 202 on the side of the slowing plate 300 away from the second opening 2021 decreases, the thrust of the coupling gel flow decreases, the first elastic element 400 contracts, and the slowing plate 300 moves away from the second opening 2021. This achieves adaptive adjustment of the output amount and output speed of the coupling gel by the slowing plate 300, ensuring that an appropriate amount of coupling gel can be evenly distributed and pushed towards the second opening 2021 under different gel amounts. A uniform distribution plate 500 is installed at the second opening 2021, and the coupling gel flows out through the uniformly distributed dispensing holes on the uniform distribution plate 500. Due to the uniform distribution and the same pore size of the dispensing holes, the coupling gel can form a uniform coating on the wall of the cast iron drying cylinder when it flows out, further ensuring that the coupling effect between the ultrasonic testing head 100 and the drying cylinder wall is uniform and consistent, and improving the accuracy of ultrasonic measurement.

[0059] In some examples, such as Figure 5 As shown, it also includes an adjustment plate 600, which has a through hole extending along the thickness direction. The through hole corresponds to the position of the glue outlet hole. The adjustment plate 600 can rotate around the circumference of the uniform distribution plate 500 to adjust the overlap area between the through hole and the glue outlet hole.

[0060] For example, the adjustment plate 600 is designed as a thin circular plate with the same diameter as the uniform distribution plate 500, ensuring that the adjustment plate 600 can cover the uniform distribution plate 500 and rotate in its circumference.

[0061] The vias on the adjusting plate 600 are circular, with the same diameter as the glue outlet holes on the distribution plate 500. The positions of the vias on the adjusting plate 600 correspond to the glue outlet holes on the distribution plate 500, so that the overlapping area between the two can be changed by rotating the adjusting plate 600. The number of vias is the same as the glue outlet holes, and they are evenly distributed in a matrix.

[0062] A non-slip groove is provided around the edge of the adjusting plate 600 to facilitate manual rotation by the operator. Meanwhile, a ring-shaped ball bearing 700 is installed between the adjusting plate 600 and the distribution plate 500. The inner ring of the ball bearing 700 is fixed to the adjusting plate 600, and the outer ring is fixed to the distribution plate 500, allowing the adjusting plate 600 to rotate smoothly and stably around the distribution plate 500 without shifting.

[0063] By rotating the adjustment plate 600, the overlap area between the through-hole and the dispensing hole is changed, thereby adjusting the flow rate of the coupling gel from the distribution plate 500. When more coupling gel is needed, the overlap area between the through-hole and the dispensing hole is increased, allowing more coupling gel to flow out; when only a small amount of coupling gel is needed or a thinner coating is required, the overlap area is decreased, reducing the outflow of coupling gel. This adjustment method allows for flexible control of the amount of coupling gel applied according to the measurement requirements of different parts of the cast iron drying cylinder, ensuring the accuracy of ultrasonic testing.

[0064] Different cast iron drying cylinders may have different surface conditions and measurement requirements, such as different surface roughness and different amounts of coupling gel required. The adjustment plate 600 allows the testing device to adapt to the measurement needs of various cast iron drying cylinders, improving the device's versatility and adaptability.

[0065] In some examples, such as Figure 5 , Figure 6 As shown, the cover 200 also has a connecting port 204 that connects the second receiving cavity 202 and the third receiving cavity 203. The connecting port 204 and the second opening 2021 are located on both sides of the buffer plate 300, respectively. The buffer plate 300 has a plurality of through holes 301 for the passage of the coupling gel. It also includes a uniform material assembly 700, which is disposed in the third receiving cavity 203 for uniformly dispersing the coupling gel in the third receiving cavity 203.

[0066] For example, a connecting port 204 is provided on the cover 200, located on the partition wall between the second receiving cavity 202 and the third receiving cavity 203. The connecting port 204 is circular to ensure that the coupling gel can flow smoothly from the second receiving cavity 202 into the third receiving cavity 203. Its position is designed on the side of the buffer plate 300 away from the second opening 2021, so that when the buffer plate 300 pushes the coupling gel, part of the coupling gel can enter the third receiving cavity 203 through the connecting port 204.

[0067] Under the negative pressure suction of the negative pressure mechanism, the third receiving cavity 203 can draw the coupling gel remaining on the cast iron drying cylinder into the third receiving cavity 203. The coupling gel in the third receiving cavity 203 will flow to the second receiving cavity 202 under the action of gravity. In order to prevent the coupling gel in the second receiving cavity 202 from flowing back to the third receiving cavity 203, the position of the coupling gel delivered to the second receiving cavity 202 can be controlled so that the height of the coupling gel is lower than the connecting port 204, thereby preventing the coupling gel from flowing back from the second receiving cavity 202 to the third receiving cavity 203.

[0068] A chamfer can be provided on one side of the connecting port 204 located in the third receiving cavity 203 to facilitate the flow guidance of the coupling gel.

[0069] The through holes 301 of the buffer plate 300 are evenly distributed on the buffer plate 300. The number of through holes 301 is reasonably set according to the area of ​​the buffer plate 300. These through holes 301 allow some of the coupling gel to flow through the through holes 301 and be stored on the side of the buffer plate 300 away from the second opening 2021 during the process of the buffer plate 300 pushing the coupling gel towards the second opening 2021, thus preventing excessive outflow of coupling gel from the second opening 2021. The uniform mixing component 700 can stir the gel evenly by rotation.

[0070] When the buffer plate 300 pushes the coupling gel towards the second opening 2021 under the action of the first elastic element 400, some of the coupling gel passes through the through hole 301 and is stored on the side of the buffer plate 300 away from the second opening 2021, preventing the buffer plate 300 from pushing too much coupling gel out of the second opening 2021. This design achieves a reasonable distribution of the coupling gel on both sides of the buffer plate 300 in the second receiving cavity 202, ensuring that there is an appropriate amount of coupling gel on both sides of the buffer plate 300 in the second receiving cavity 202, thus ensuring stable coating.

[0071] In some examples, such as Figure 5As shown, the uniform material assembly 700 includes a spiral uniform material plate 701 and a driving wheel 702. The spiral uniform material plate 701 is rotatably disposed in the third receiving cavity 203. There are multiple spiral uniform material plates 701, which are distributed circumferentially along the third opening 2031, and are used for uniform dispersion of the coupling gel in the third receiving cavity 203. The driving wheel 702 is rotatably disposed outside the cover 200 and is connected to the spiral uniform material plate 701 for driving and rotating on the wall of the cast iron drying cylinder, thereby driving the spiral uniform material plate 701 to rotate.

[0072] For example, the spiral uniform distribution plate 701 is spiral in shape, which effectively stirs and couples the gel when rotating, making it uniformly dispersed. Multiple spiral uniform distribution plates 701 are evenly distributed along the circumference of the third opening 2031, and each spiral uniform distribution plate 701 is mounted on the inner wall of the third receiving cavity 203 by a short shaft, one end of which is fixed to the cavity wall.

[0073] The drive wheel 702 is a rubber roller with an anti-slip pattern to increase friction with the cast iron drying cylinder wall. The drive wheel 702 is mounted outside the cover 200 via a drive shaft and can rotate freely.

[0074] The drive wheel 702 and the spiral material equalizer 701 can be connected by bevel gears. After the drive wheel 702 rotates, it can drive the spiral material equalizer 701 to rotate synchronously to achieve material equalization. Moreover, the spiral material equalizer 701 can evenly distribute the material whether it rotates forward or backward. Therefore, even if the drive wheel 702 rotates forward or backward, it will not affect the material equalization.

[0075] When the cover 200 is attached to the wall of the cast iron drying cylinder, the drive wheel 702 contacts the cylinder wall. As the cover 200 moves on the cylinder wall, the drive wheel 702 rolls on the cylinder wall. The drive wheel 702 drives multiple spiral material distribution plates 701 distributed circumferentially along the third opening 2031 to rotate. During rotation, the spiral structure of the spiral material distribution plates 701 stirs and pushes the coupling gel in the third receiving cavity 203, making it evenly dispersed in the third receiving cavity 203, which facilitates the negative pressure mechanism to more effectively recover the coupling gel through the third opening 2031.

[0076] The drive wheels 702 rotate by moving the cover 200 along the wall of the cast iron drying cylinder, requiring no additional power source. This adaptive drive method allows the operation of the uniform material assembly 700 to be closely integrated with the measurement operation of the detection device on the drying cylinder, reducing the complexity of the equipment and ensuring that the spiral uniform material plate 701 can effectively disperse the coupled gel at different measurement positions and moving speeds. Although the circumferential arrangement of multiple drive wheels 702 means that only a few can rotate while moving along the wall of the cast iron drying cylinder, allowing the spiral uniform material plate 701 to achieve the required stirring effect, it still achieves the desired mixing effect. This is because at least a few of the multiple drive wheels 702 will always be able to rotate; if one wheel is not rotating, it may rotate at the next.

[0077] In some examples, the negative pressure mechanism is a negative pressure suction tube 1000, which is connected to the third receiving cavity 203. The material distribution assembly 700 also includes an annular suction plate 703, which is disposed at the third opening 2031 and has a plurality of suction holes 7031 for sucking up the coupling gel under the suction force of the negative pressure suction tube 1000 and delivering it to the third receiving cavity 203.

[0078] For example, such as Figures 4 to 6 As shown, when the negative pressure suction tube 1000 is opened, it generates a negative pressure in the third receiving cavity 203, which can effectively remove the coupling gel on the wall of the cast iron drying cylinder. One end of the negative pressure suction tube 1000 is connected to the side wall of the third receiving cavity 203, and the other end is connected to an external negative pressure source, such as a small vacuum pump.

[0079] The annular suction plate 703 has a circular structure. Its outer diameter is the same as that of the third opening 2031, while its inner diameter is slightly smaller, allowing it to be installed precisely at the third opening 2031. Suction holes 7031 are evenly distributed on the annular suction plate 703 and are circular through holes. The distribution and hole diameter ensure that, under negative pressure, the coupling gel can be evenly drawn into the third receiving cavity 203 from each suction hole 7031, avoiding uneven recovery of the coupling gel due to excessive or insufficient local suction.

[0080] The negative pressure suction tube 1000 is tightly fitted with the annular suction plate 703. The negative pressure generated by the suction tube 1000 is transmitted to the wall of the cast iron drying cylinder through the suction holes 7031 on the annular suction plate 703, drawing the coupling gel on the cylinder wall into the third receiving cavity 203. The structure of the annular suction plate 703 and the distribution of the suction holes 7031 ensure that the negative pressure can act evenly on the wall of the cast iron drying cylinder, improving the recovery effect of the coupling gel.

[0081] When the negative pressure source is activated, the negative pressure is transmitted to the annular suction plate 703 through the negative pressure suction pipe 1000. Under the action of negative pressure, the coupling gel on the wall of the cast iron drying cylinder is sucked into the third receiving cavity 203 through the suction holes 7031 on the annular suction plate 703. Since the suction holes 7031 are evenly distributed on the annular suction plate 703, the coupling gel can be evenly sucked in, avoiding local residue. At the same time, the spiral material distribution plate 701 evenly disperses the coupling gel in the third receiving cavity 203, so that the sucked-in coupling gel can be better stored and subsequently processed in the third receiving cavity 203. In particular, in order to ensure that the coupling gel sucked into the third receiving cavity 203 through the suction holes 7031 does not flow out again, the number of suction holes 7031 is relatively small, thereby ensuring the stability of material suction.

[0082] The annular structure of the annular suction plate 703 is adapted to the third opening 2031, enabling it to cover a large area of ​​the cast iron drying cylinder wall and increasing the recovery area of ​​the coupling gel. The rational distribution and design of the suction holes 7031, as well as their coordinated operation with the spiral material distribution plate 701 and the driving wheel 702, ensure that the coupling gel can be efficiently recovered under different positions and conditions, thus improving the overall recovery efficiency.

[0083] In some examples, such as Figure 6 As shown, the replenishment component 800 is disposed outside the cover 200 and communicates with the second receiving cavity 202 for replenishing coupling gel into the second receiving cavity. The replenishment component 800 includes a material tank, a connecting pipe 801 and a peristaltic pump. The material tank is disposed outside the cover 200 for containing coupling gel. One end of the connecting pipe 801 is connected to the material tank and the other end is communicated with the second receiving cavity 202. The peristaltic pump is disposed on the connecting pipe 801 for peristaltic replenishment of coupling gel.

[0084] For example, the material tank is cylindrical in shape with a sealable feeding port at the top for easy addition of coupling gel. One end of the connecting pipe 801 is connected to the discharge port at the bottom of the material tank, and the other end is connected to the second receiving cavity 202 on the cover 200. A small high-peristalsis pump is used and is installed on the connecting pipe 801 to achieve peristaltic delivery of the coupling gel.

[0085] The material tank is used to store the coupling gel. A peristaltic pump delivers the coupling gel from the material tank to the second receiving chamber 202 through the connecting pipe 801, thereby replenishing the coupling gel. The replenishment assembly 800 realizes an integrated operation process for coupling gel replenishment, coating, measurement, and recovery, optimizing the workflow, reducing manual intervention, and improving work efficiency.

[0086] In some examples, such as Figure 5As shown, it also includes a second elastic element 900. One end of the second elastic element 900 acts on the buffer plate 300, and the other end acts on the uniform distribution plate 500 or the cover 200, providing a force for the buffer plate 300 to move away from the uniform distribution plate 500, so as to work together with the first elastic element 400 to make the buffer plate 300 swing back and forth.

[0087] For example, the compressive force of the first elastic element 400 and the tensile force of the second elastic element 900 interact. When the buffer plate 300 approaches the uniformly distributed plate 500 under the push of the first elastic element 400, the second elastic element 900 is gradually stretched, storing elastic potential energy. When the pushing force of the first elastic element 400 is less than the tensile force of the second elastic element 900, the buffer plate 300 begins to move in the opposite direction, the second elastic element 900 releases its elastic potential energy, and the first elastic element 400 begins to store elastic potential energy. When the buffer plate 300 moves in the opposite direction to a certain extent, the elastic potential energy of the first elastic element 400 becomes greater than that of the second elastic element 900, and the buffer plate 300 moves forward again. This cycle repeats, realizing the reciprocating swaying of the buffer plate 300.

[0088] The reciprocating oscillation of the buffer plate 300 can stir and disperse the coupling gel while still maintaining its resistance to the material flow. Compared to the simple unidirectional movement of the buffer plate 300, this reciprocating motion increases the flow path and agitation of the coupling gel within the second receiving cavity 202, thereby enabling more uniform mixing and dispersion of the coupling gel within the second receiving cavity 202. This lays the foundation for achieving more uniform coating subsequently through the distribution plate 500 and the adjustment plate 600.

[0089] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A wall thickness detection device, characterized in that, include: An ultrasonic testing head (100) is used to measure the thickness of the outer wall; The cover (200) has a detection surface for fitting against the outer wall. The cover (200) has a first receiving cavity (201) for mounting the detection head (100) and a second receiving cavity (202) for receiving coupling gel. The second receiving cavity (202) is annular and located on the outer periphery of the first receiving cavity (201). The first receiving cavity (201) has a first opening (2011) located in the detection surface. The detection end of the ultrasonic detection head (100) corresponds to the first opening (2011). The second receiving cavity (202) has a second opening (2021) located in the detection surface and surrounding the first opening. The second opening (2021) is used to coat the coupling gel onto the outer wall. A fluid replenishment assembly (800) is connected to the second receiving cavity (202) and is used to inject coupling gel into the second receiving cavity (202).

2. The wall thickness detection device according to claim 1, characterized in that, The cover (200) also has a third receiving cavity (203), which has a third opening (2031) located on the detection surface. The detection device also includes a negative pressure mechanism, which is connected to the third receiving cavity (203) and sucks away the coupling gel on the outer wall through the third opening (2031).

3. The wall thickness detection device according to claim 2, characterized in that, The detection surface is provided with a flexible contact portion, which is used to fit tightly against the outer wall.

4. The wall thickness detection device according to claim 2, characterized in that, Also includes: A buffer plate (300) is slidably disposed in the second receiving cavity (202) to slow down the discharge of coupling gel in the second receiving cavity (202) through the second opening (2021); A first elastic element (400) has one end acting on the buffer plate (300) and the other end acting on the cover (200) to pull the buffer plate (300) toward the bottom of the cover (200); A uniform distribution plate (500) is disposed at the second opening (2021). The uniform distribution plate (500) has adhesive outlet holes that extend through the thickness direction. The adhesive outlet holes are uniformly distributed in the uniform distribution plate (500). The uniform distribution plate (500) is used to make the coupling gel flow out uniformly.

5. The wall thickness detection device according to claim 4, characterized in that, Also includes: An adjusting plate (600) has a through hole extending along the thickness direction, the through hole being positioned opposite to the glue outlet hole, and the adjusting plate (600) being circumferentially rotatable along the uniform distribution plate (500) to adjust the overlap area between the through hole and the glue outlet hole.

6. The wall thickness detection device according to claim 5, characterized in that, The cover (200) also has a communication port (204) connecting the second receiving cavity (202) and the third receiving cavity (203), the communication port (204) and the second opening (2021) are respectively located on both sides of the buffer plate (300); the buffer plate (300) has a plurality of through holes (301), the through holes (301) are used for coupling the passage of gel; It also includes a uniform dispersing component (700), which is disposed in the third receiving cavity (203) for uniform dispersion of the coupling gel in the third receiving cavity (203).

7. The wall thickness detection device according to claim 6, characterized in that, The material leveling assembly (700) includes: Spiral uniform material sheet (701), the spiral uniform material sheet (701) is rotatably disposed in the third receiving cavity (203), the number of the spiral uniform material sheet (701) is multiple, and they are distributed circumferentially along the third opening (2031), for uniform dispersion of coupling gel in the third receiving cavity (203); The walking drive wheel (702) is rotatably disposed outside the cover (200) and is connected to the spiral material distribution plate (701) for driving and rotating on the outer side wall, thereby driving the spiral material distribution plate (701) to rotate.

8. The wall thickness detection device according to claim 7, characterized in that, The negative pressure mechanism is a negative pressure suction tube (1000), which is connected to the third receiving cavity (203). The material leveling assembly (700) further includes: An annular suction plate (703) is provided at the third opening (2031) and has several suction holes (7031) for sucking up the coupling gel under the suction force of the negative pressure suction tube (1000) and sending it to the third receiving cavity (203).

9. A wall thickness detection device according to any one of claims 4-8, characterized in that, The replenishment component (800) is disposed outside the cover (200) and communicates with the second receiving cavity (202) for replenishing coupling gel into the second receiving cavity (202). The replenishment component (800) includes: A material container, disposed outside the cover (200), is used to contain the coupling gel; A connecting pipe (801) is provided, one end of which is connected to the material tank and the other end of which is connected to the second receiving cavity (202). A peristaltic pump, which is disposed on the connecting tube (801), is used for peristaltic replenishment of coupling gel.

10. A wall thickness detection device according to claim 9, characterized in that, Also includes: The second elastic element (900) acts on the buffer plate (300) at one end and on the uniform distribution plate (500) or the cover (200) at the other end, providing a force to move the buffer plate (300) away from the uniform distribution plate (500), and works together with the first elastic element (400) to make the buffer plate (300) sway back and forth.

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