A device and method capable of monitoring the internal state of a fine cooling control gas duct

Abstract

The present application relates to a kind of device capable of monitoring the inside state of fine cooling control air pipe, the device includes control cabinet (1), valve row type pneumatic reversing valve (2), monitor a large amount of emulsion device (3), air pipe internal pressure monitoring device (4), monitor a small amount of emulsion device (5), device fixing support (6), gas source (7), pipe gallery pressing plate (8), power supply (9), inlet four-way pipe (10), wire (11), support wire device (12), monitor a large amount of emulsion device passage (13), bulb (14), back four-way pipe (15), PH test paper in monitor a small amount of emulsion device (16), pressure display component knob push rod (17), etc., the scheme guarantees the injection function and precision of fine cooling, in turn effectively keep the roller always has good roll shape, and roll out the product that completely meets production process.

Description

Technical Field

[0001] This invention relates to a method, specifically to a device and method for monitoring the internal state of a fine cooling control gas pipe, belonging to the field of rolling mill machinery technology and maintenance technology. Background Technology

[0002] During the production process of the pickling and rolling mill, the precision cooling device is installed inside the frame, which is filled with high-temperature and high-humidity emulsion. Furthermore, the beam contains highly corrosive emulsion liquid. Therefore, vulnerable components such as hoses and seals within the spray beam are prone to aging, deformation, and cracking, leading to a gradual loss of their original function. Although we have made corresponding optimizations through continuous exploration, such as improving the material of the air pipes and joint seals, and significantly extending their service life, they still inevitably experience sealing failures and joint leaks due to aging. Because these vulnerable components are installed inside the spray beam of the precision cooling device, their operating status cannot be directly observed. Therefore, we can only rely on online testing, using the spray effect of the injection valve—whether it is "high-flow, long-lasting spray" or "low-flow, long-lasting spray"—as a basis for judgment. We use maintenance and disassembly to thoroughly inspect the condition of vulnerable components inside the beam and replace damaged or malfunctioning parts in real time. The precision cooling spray valve is controlled with a second-level precision. It responds promptly to the pressure deviation detected by the plate roll at the outlet of the last frame. Whether the roll of the last frame is convex or concave, and whether cooling is required, the precision cooling system responds quickly, with a response time of only 300 milliseconds. Therefore, the piston movement frequency inside the spray valve is extremely high, which directly leads to a short service life. The seal is prone to damage such as twisting, expansion, cracking, and collapse, which in turn causes twisting and expansion to cause jamming and slow response time. Cracks and collapses cause emulsion backflow into the control air pipe, resulting in poor flow rate and slow response time. Both of these phenomena cannot meet the process requirements, and the spraying effect deteriorates. Repeated operation can further age the sealing lip, causing the collapsed lip to become flat and lose its ability to reopen. This results in an excessively large gap between the piston and valve body, making it impossible to prevent the emulsion from further seeping into the air pipe and backflowing into the pneumatic control cabinet. Because the emulsion contains a large amount of iron oxide particles, it obstructs the movement of the solenoid-pneumatic directional valve core within the control cabinet, causing damage to the solenoid valve. This leads to internal leakage due to the valve core not being in place during reversal, or even complete failure to reversal, resulting in the valve remaining in either a "normally open" or "normally closed" state for an extended period. Consequently, precise control of the injection valve cannot be achieved, leading to ineffective control of the roll profile and ultimately severe plate shape abnormalities. Therefore, real-time and accurate monitoring of the branch pipe's condition is crucial, as it indirectly reveals the operational status of the unseen injection valve body seal and the piston seal within the valve body.

[0003] After searching, it was found that there are currently no effective means to monitor and control the presence, internal leakage, presence, and amount of emulsion within the gas tube during the rolling process. Commonly used methods include:

[0004] 1. Inspectors rely on inserting and removing the trachea to sense and determine whether there is pressure in the trachea;

[0005] 2. Perform fine cold-cut spot injection tests periodically to determine whether there is emulsion in the trachea.

[0006] All of the above operations have obvious drawbacks: large testing errors, long testing time, and the need to stop the rolling mill before they can be performed.

[0007] In summary, given the lack of mature and readily available technologies, the team needs to develop an online pressure and emulsion penetration monitoring and display device. This device would allow for real-time monitoring and human judgment of the pressure within the control branch pipe of the mill's fine cooling nozzles, timely detection and notification of abnormal emulsion penetration within the branch pipe, and proper control of backflow of emulsion. Only by ensuring the proper spraying function and precision of fine cooling can a good roll profile be effectively maintained, thereby meeting the product quality requirements. Summary of the Invention

[0008] This invention addresses the technical problems existing in the prior art by providing a method and apparatus for monitoring the internal state of the fine cooling control pipe. It enables real-time monitoring of the internal state of the fine cooling nozzle control pipe in the rolling mill (including "presence or absence of pressure", "presence or absence of internal leakage", "presence or absence of emulsion", and "amount of emulsion in the pipe"). This facilitates timely detection, display, and processing, effectively controlling the backflow of emulsion and reliably ensuring the spray function and precision of fine cooling. Consequently, it effectively maintains the rolls with good roll shape, producing products that fully comply with the production process.

[0009] A method for monitoring the internal state of a fine cooling control tube is provided, specifically addressing the pressure and immersion conditions within the fine cooling nozzle control branch tube. The monitoring method comprises two stages: pressure monitoring and immersion monitoring, allowing for both single and simultaneous monitoring.

[0010] The pressure detection method includes the following steps:

[0011] Step 1: Fine cooling is running normally, and the pressure detection device begins to detect the pipeline status;

[0012] Step 2: The pipeline status can be determined based on the abnormal status of the model tolerance (the color difference is obvious when the plate shape diagram is displayed intuitively), or the plate shape status corresponding to the tension deviation value detected by the plate shape roller can be connected to the detection system;

[0013] Step 3: Abnormal rib formation (large tension deviation value): Determine that the nozzles of the corresponding section of the fine cooling system in this area should be in the closed state, i.e., not spraying emulsion;

[0014] Step 4: Verify on-site via video footage whether the pressure detection device's push rod is in a raised state (i.e., the air pipe is pressurized while the injection valve is closed);

[0015] Step 5: Indentation anomaly (small tension deviation value): Determine that the nozzle of the corresponding section of the fine cooling system in this area should be in the open state, i.e., spraying emulsion;

[0016] Step 6: Verify on-site via video footage whether the pressure monitoring device's push rod is in the reset state (i.e., the air tube is under no pressure while the injection valve is open);

[0017] Step 7: Use the rolling gap to process the air reversing valve of the corresponding circuit;

[0018] Step 8: If the actual situation on-site is still contrary to what it should be, further inspection and processing are required until it returns to normal.

[0019] The method for water immersion monitoring includes the following steps:

[0020] Step 1: Fine cooling is running normally, and the water immersion detection device begins to detect the pipeline status;

[0021] Step 2: Damage or collapse of the injection valve seal causes a functional defect, resulting in emulsion flowing back from the injection valve piston seal into the air pipe;

[0022] Step 3: As production continues and the number of sprays increases, the amount of fluid accumulating in the trachea will also increase.

[0023] Step 4: When the amount of emulsion in the trachea rises to the device for monitoring a small amount of emulsion, it begins to change color under the action of the test strip, which can be observed through online video.

[0024] Step 5: As the amount of emulsion increases, the color band on the test strip lengthens;

[0025] Step 5: As the amount of emulsion in the trachea continues to rise, the emulsion will seep into the device for monitoring large amounts of emulsion.

[0026] Step 6: When the circuit is short-circuited, the indicator light will illuminate. The more emulsion there is, the stronger the conductivity, and the brighter the light will be. This can be indicated by an online alarm.

[0027] Step 7: Use the rolling gap to process the air pipes of the corresponding circuit.

[0028] To achieve the above objectives, the technical solution of the present invention is as follows: a device capable of monitoring the internal state of a fine cooling control air pipe, the device comprising a control cabinet (1), a valve-type pneumatic reversing valve (2), a device for monitoring large amounts of emulsion (3), an air pipe internal pressure monitoring device (4), a device for monitoring small amounts of emulsion (5), a device fixing bracket (6), an air source (7), a pipe gallery pressure plate (8), a power supply (9), an air inlet four-way pipe (10), an electric wire (11), a supporting electric wire device (12), a channel for monitoring large amounts of emulsion (13), a light bulb (14), and a return air four-way pipe (15). The device monitors a small amount of emulsion, including a pH test strip (16), a pressure display component push rod (17), mounting clips (18, 19), a support device (20), a return spring (21), a control for the first air inlet (22), a control for the second air inlet (23), a control for the third air inlet (24), a double-sealed piston structure (26), a ball-end piston structure (27), and a pipe connector (28) inside the beam. A valve-type pneumatic directional valve (2) is installed on the valve seat of the control cabinet (1). The device monitors a large amount of emulsion (3), a pressure monitoring device inside the pipe (4), and a device monitors a small amount of emulsion (5). The pressure detection and immersion device, consisting of the components, is installed on the pipeline channel and fixed to the pipe rack pressure plate (8) inside the control cabinet (1) by the device fixing bracket (6). The wire (11) is fixed on the supporting wire device (12). When the wire (11) is connected, the bulb (14) will light up under the action of the power supply (9). Install the buckles (18, 19). The four-way air inlet pipe (10) is connected to the first air inlet (22), and the four-way air return pipe (15) is connected to the second air inlet (23) and the third air inlet (24), so that the pneumatic reversing valve controls the flow. The gas inlet and outlet of the piston are monitored by the monitoring device; among them, the pressure monitoring device (4) in the air pipe, when there is pressure in the pipe, the convex push rod (17) of the pressure display component is in a convex state and is displayed in red. Once the direction is reversed, there is no pressure in the pipe. Under the action of the spring in the device, the convex push rod (17) of the pressure display component can be quickly reset, so that it can be clearly judged that there is no pressure in the pipe at this time. If there is leakage in the pipe, the convex push rod (17) will be displayed in the middle position under the combined action of the spring in the device and the air pressure in the pipe.

[0029] Furthermore, this scheme uses two methods to monitor water content: one for large water volume and one for small water volume. When the piston seal ring inside the spray valve of the spray beam is worn or collapsed, resulting in a sealing defect, a small amount of emulsion will seep into the control air pipe through the outside of the seal ring. As production progresses, the amount of emulsion will gradually increase until it extends upward along the pipe to the device for monitoring large amounts of emulsion (3) and the device for monitoring small amounts of emulsion (5). Depending on the liquid level in the pipe, it will first be monitored by the device for monitoring small amounts of emulsion (5), and it will accumulate and spread on the test paper, causing the pH test paper to change color. The more water there is, the more obvious and longer the color difference band will be. At this time, the device for monitoring large amounts of emulsion (3) cannot be short-circuited and the bulb will not light up. However, after a large amount of emulsion accumulates in the air pipe and triggers the liquid level guard line in the device for monitoring large amounts of emulsion (3), a short circuit is formed between the two poles and a conductive circuit is completed. At this time, the bulb (14) will start to light up. The more emulsion there is, the stronger the conductivity, the greater the current, and the brighter the bulb.

[0030] Furthermore, a camera is installed inside the control cabinet, which can be connected to a computer or a mobile phone, allowing for observation anytime and anywhere, thereby achieving timely anomaly detection, including whether the test paper inside the device changes color, whether the light bulb is lit, and the status of the pressure monitoring device (4) push rod (17), providing accurate data for subsequent anomaly judgment and corresponding handling measures.

[0031] The principle of the pipeline pressure monitoring process of this invention is as follows: When there is pressure in the pipeline, the pressure display component convex push rod (17) is in a convex state and is displayed in red. Once the direction is reversed and there is no pressure in the pipeline, the convex push rod will be quickly reset under the action of the spring in the device. The tolerance abnormality is displayed on the plate shape drawing of the rolling model (visually displayed as obvious color difference). If the rib abnormality is encountered, it is determined that the nozzle of the corresponding section of the fine cooling system should be in the closed state (i.e., there should be pressure in the pipeline). On-site observation shows that the convex push rod of the pressure monitoring device should be in a convex state. If it is normal, the pneumatic control problem can be ruled out. Otherwise, it is only necessary to check why it is not convex. Similarly, once the dent abnormality occurs, it is determined that the nozzle of the corresponding section of the fine cooling system should be in the open state (i.e., there should be no pressure in the pipeline). On-site observation shows that the convex push rod of the pressure monitoring device should be in a reset state. If it is normal, the pneumatic control problem can be ruled out. Otherwise, it is only necessary to check why it is not reset.

[0032] The backflow direction of the emulsion in this invention is as follows: 9 kg of pressurized emulsion from the emulsion system flows to the improved ball end piston structure (27) and is blocked. Due to damage or collapse of individual spray valve seals in the original single-seal piston structure (25), the emulsion backflows from the spray valve piston seal into the air pipe (28). As production continues and the number of sprays increases, the liquid accumulation in the air pipe will continue to increase and split into three paths, respectively reaching the monitoring device (3) for large quantities of emulsion, the air pipe, and the air pipe. The internal pressure monitoring device (4) and the device for monitoring a small amount of emulsion (5) are connected. When the amount of emulsion in the trachea rises to the device for monitoring a small amount of emulsion (5), it begins to change color under the action of the test paper (16). As the amount of emulsion increases, the color band of the test paper (16) lengthens. When the amount of emulsion in the trachea continues to rise, the emulsion will soak into the device for monitoring a large amount of emulsion (3). The two poles of the wire (11) on the supporting wire device (12) are short-circuited, and the indicator light (14) is lit. The more emulsion there is, the brighter the light (14) becomes. There is also a path that reaches the internal pressure monitoring device (4) in the trachea. It operates when there is no emulsion in the tube. When there is pressure in the tube, the pressure display component convex button push rod (17) is in a convex state and is displayed in red. Once the direction is reversed, there is no pressure in the tube, and the convex button push rod will be quickly reset under the action of the spring in the device.

[0033] Compared with existing technologies, this method also has the following advantages and beneficial effects:

[0034] 1. The method of the present invention is simple and easy to manufacture, makes full use of existing equipment, and can quickly and efficiently complete the monitoring task, and can better achieve the expected monitoring objectives;

[0035] 2. This invention effectively utilizes pH test paper and a simple short-circuit device for water immersion monitoring to determine the presence and amount of water immersion, and the air pressure and spring balance method to determine the presence and magnitude of pressure. Both methods are simple, easy to implement, not limited by location, quick, intuitive, and provide excellent monitoring results, achieving a clear and concise understanding, facilitating reliable inspections, and enabling timely detection of abnormalities. The pressure status within the pipeline can be determined by visually displaying a significant color difference on a plate-shaped diagram, specifically showing the tension deviation value detected by the plate-shaped roller. On-site verification of the presence and magnitude of pressure within the control pipeline under abnormal conditions such as rib formation or indentation via video footage is possible. Furthermore, the depth and length of the color change on the test paper after water immersion are observed through online video footage to determine the water inflow. Large water inflows are monitored by the brightness of the bulb in a point-conducting state, and an online alarm function is also included.

[0036] 3. This solution can be implemented during any scheduled maintenance, better ensuring production schedules are met. Water immersion and pressure are effectively controlled during production, significantly improving product quality. This technical solution achieves low cost and high monitoring effectiveness through the coordinated operation of equipment monitoring water inflow.

[0037] 4. The entire precision cooling system operates stably, greatly reducing downtime and ensuring that all injection parameters are within the ideal range. Precise control of injection parameters significantly reduces F5 plate shape anomalies (such as rib formation), and also greatly reduces scrap and defect rates (such as scratches), resulting in annual economic benefits exceeding 1 million yuan. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the pipeline emulsion monitoring process of the present invention.

[0039] Figure 2 This is a schematic diagram of the pipeline pressure monitoring process of the present invention.

[0040] Figure 3 This is a diagram showing the arrangement of the apparatus of the present invention.

[0041] Figure 4 This is a schematic diagram illustrating the monitoring effect of the device of the present invention.

[0042] Figure 5 This is a schematic diagram of the pressure display device of the present invention.

[0043] Figure 6 This is an internal cross-sectional view of the pressure display device of the present invention.

[0044] Figure 7 This is a schematic diagram of the optimized piston sealing structure of the present invention.

[0045] In the diagram: 1-Control cabinet, 2-Pneumatic reversing valve, 3-Monitoring device for large quantities of emulsion, 4-Pressure monitoring device inside the air pipe, 5-Monitoring device for small quantities of emulsion, 6-Device mounting bracket, 7-Air source, 8-Pipe gallery pressure plate, 9-Power supply, 10-Inlet four-way pipe, 11-Electric wire, 12-Supporting wire device, 13-Channel for monitoring large quantities of emulsion, 14-Light bulb, 15-Return four-way pipe, 16-pH test paper inside the device for monitoring small quantities of emulsion, 17-Pressure protrusion display component (protruding button push rod), 18-Mounting buckle, 19-Mounting buckle, 20-Supporting device, 21-Return spring, 22-Controlling the first air inlet, 23-Controlling the second air inlet, 24-Controlling the third air inlet, 25-Single-seal piston structure before improvement, 26-Double-seal piston structure after improvement, 27-Spherical end face piston structure after improvement, 28-Air pipe connector inside the beam. Detailed implementation method:

[0046] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0047] Example: See Figure 1As shown in the pipeline immersion monitoring process of the present invention, the monitoring of water content in this scheme is divided into monitoring large water volume and monitoring small water volume. When the vulnerable parts of the spray beam are worn, a small amount of emulsion will enter the pipeline and rise to the device for measuring large amount of emulsion (3) and the device for monitoring small amount of emulsion (5). The small amount of emulsion will be quickly detected by the device for monitoring small amount of emulsion (5) and will collect and diffuse on the test paper, causing the pH test paper to change color. At this time, the device for monitoring large amount of emulsion (3) cannot be short-circuited and the bulb will not light up. However, when a large amount of emulsion accumulates in the pipeline and exceeds the warning line, the two poles form a short circuit and conduct a circuit. At this time, the bulb (14) starts to light up. The more emulsion there is, the stronger the conductivity, the greater the current, and the brighter the bulb.

[0048] Example 2:

[0049] See Figure 2 As shown in the pipeline pressure monitoring process of the present invention, when there is pressure in the pipeline, the pressure display component convex push rod (17) is in a convex state and is displayed in red. Once the direction is reversed and there is no pressure in the pipeline, the convex push rod will be quickly reset under the action of the spring in the device. The tolerance abnormality is displayed on the plate shape drawing of the rolling model (visually displayed as obvious color difference). If the rib abnormality is encountered, it is determined that the nozzle of the corresponding section of the fine cooling system should be in the closed state (i.e., there should be pressure in the pipeline). On-site observation shows that the convex push rod of the pressure monitoring device should be in a convex state. If it is normal, the pneumatic control problem can be ruled out. Otherwise, it is only necessary to check why it is not convex. Similarly, once the dent abnormality occurs, it is determined that the nozzle of the corresponding section of the fine cooling system should be in the open state (i.e., there should be no pressure in the pipeline). On-site observation shows that the convex push rod of the pressure monitoring device should be in a reset state. If it is normal, the pneumatic control problem can be ruled out. Otherwise, it is only necessary to check why it is not reset.

[0050] Example 3:

[0051] See Figure 3-7A method and apparatus for monitoring the internal state of a fine cooling control trachea, involving an online pressure and emulsion immersion monitoring and display device. The device includes a control cabinet (1), a valve-type pneumatic reversing valve (2), a device for monitoring large amounts of emulsion (3), a pressure monitoring device in the air pipe (4), a device for monitoring small amounts of emulsion (5), a device fixing bracket (6), an air source (7), a pipe rack pressure plate (8), a power supply (9), an air inlet four-way pipe (10), an electric wire (11), a supporting electric wire device (12), a channel for monitoring large amounts of emulsion (13), a light bulb (14), a return air four-way pipe (15), pH test paper in the device for monitoring small amounts of emulsion (16), a pressure display component (17), a pressure protrusion display component (17), mounting buckles (18, 19), a support device (20), a return spring (21), a control first air inlet (22), a control second air inlet (23), a control third air inlet (24), an improved double-sealed piston structure (26), an improved ball end face piston structure (27), and an air pipe connector in the beam body (28). The valve-type pneumatic reversing valve (2) is installed on the valve seat of the control cabinet (1). A set of pressure detection and water immersion devices consisting of a large emulsion monitoring device (3), an air pipe pressure monitoring device (4), and a small emulsion monitoring device (5) are all installed on the pipeline channel and fixed on the pipe rack pressure plate (8) inside the control cabinet (1) by the device fixing bracket (6). The wire (11) is fixed on the supporting wire device (12). When the wire (11) is connected, the bulb (14) will light up under the action of the power supply (9). Install the buckles (18, 19). The four-way air inlet pipe (10) is connected to the first air inlet (22), and the four-way air return pipe (15) is connected to the second air inlet (23) and the third air inlet (24), so that the gas entering and exiting through the control piston of the pneumatic reversing valve is monitored by the monitoring device.

[0052] Example 4:

[0053] Reference Figure 7Since Examples 1 and 2 are essentially passive monitoring methods, the best monitoring methods are only remedial measures after an anomaly occurs. If we can effectively control backflow to minimize or even eliminate its occurrence, it will play a crucial role in the stable operation of the entire system. Therefore, we optimized and improved the entire piston sealing assembly, changing it from a single-channel seal to a double-channel lip seal. The "back-to-back" structure provides a better sealing effect. The lip seal on the emulsion side is always open under the action of the emulsion's hydraulic force, while the lip seal on the other side facing the air pipe is also always open under the action of pneumatic force. Whether the piston is at the front end of the injection valve body, i.e., the emulsion is closed, or at the rear end of the injection valve body, i.e., the emulsion is open, a reliable sealing effect can be achieved, preventing backflow. In addition, we optimized and improved the pneumatic control structure of the piston body of the entire injection valve for the 10 nozzles in the middle section of the row that only serve a lubrication function and are essential for the rolling of each plate. In the middle part, a plug was used to directly replace the air inlet connector. The nozzles in the middle section are kept "always open," ensuring good lubrication and effectively removing dirt from the spray beam system while completely preventing the possibility of emulsion immersion in the control air pipe. However, the installation of the initial piston sealing assembly must adhere to the principle of first inserting the piston into the injection valve body and then sealing the air passage interface with a plug. This avoids the problem of back pressure acting on the piston body due to compression of the cavity space after initial sealing, which could lead to reduced flow. For the 16 nozzles on each side, the piston body of the injection valve has been optimized and improved. The piston's front end structure has been changed from a cylindrical structure to a hemispherical structure. Each opening requires only a small amount of hydraulic force to trigger the piston opening function, eliminating the need for pneumatic control and allowing for small-volume dispensing, thus reducing the risk of emulsion immersion. The system can visually display significant color differences, specifically showing the tension deviation value detected by the plate roller. On-site verification of the pressure status within the control pipe under abnormal conditions such as rib formation or dents via video footage, as well as online video observation after water immersion and online alarm indication, are also available.

[0054] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A device capable of monitoring the internal state of a fine cooling control duct, characterized in that, The device includes a control cabinet (1), a valve-type pneumatic reversing valve (2), a device for monitoring large amounts of emulsion (3), a pressure monitoring device in the air pipe (4), a device for monitoring small amounts of emulsion (5), a device fixing bracket (6), an air source (7), a pipe rack pressure plate (8), a power supply (9), an air inlet four-way pipe (10), an electric wire (11), a supporting device for the electric wire (12), a channel for monitoring large amounts of emulsion (13), a light bulb (14), a return air four-way pipe (15), pH test paper inside the device for monitoring small amounts of emulsion (16), a pressure display component convex push rod (17), mounting clips (18, 19), a support device (20), a return spring (21), a control for the first air inlet (22), a control for the second air inlet (23), a control for the third air inlet (24), and a double-sealed piston structure (26). The ball end piston structure (27) and the air pipe joint (28) inside the beam, the valve-type pneumatic reversing valve (2) are installed on the valve seat of the control cabinet (1), and a set of pressure detection and water immersion devices consisting of a large emulsion monitoring device (3), an air pipe pressure monitoring device (4), and a small emulsion monitoring device (5) are all installed on the pipeline channel and fixed on the pipe rack pressure plate (8) inside the control cabinet (1) by the device fixing bracket (6). The wire (11) is fixed on the supporting wire device (12) and the buckles (18, 19) are installed. The four-way air inlet pipe (10) is connected to the first air inlet (22), and the four-way air return pipe (15) is connected to the second air inlet (23) and the third air inlet (24), so that the gas entering and exiting through the pneumatic reversing valve control piston is monitored by the monitoring device.

2. The device for monitoring the internal state of a fine cooling control air pipe according to claim 1, characterized in that, When there is pressure in the tracheal pressure monitoring device (4), the convex push rod (17) of the pressure display component is in a convex state and is displayed in red. Once the direction is reversed, there is no pressure in the tube. Under the action of the spring in the device, the convex push rod (17) of the pressure display component can be quickly reset, so that it can be clearly judged that there is no pressure in the tube at this time. If there is leakage in the tube, the convex push rod (17) will be displayed in the middle position under the combined action of the spring in the device and the air pressure in the tube.

3. The device for monitoring the internal state of a fine cooling control air pipe according to claim 1, characterized in that, Install a camera in the control cabinet and connect it to a computer or mobile phone to monitor whether the test strip inside the device changes color, whether the light bulb is lit, and the status of the pressure monitoring device (4) push rod (17). This will provide accurate data for subsequent abnormal judgments and corresponding handling measures.

4. A method for monitoring the internal state of a fine cooling control duct, characterized in that, The method employs the apparatus according to any one of claims 1-3. Includes the following steps: The monitoring method includes two steps: pressure monitoring and immersion monitoring. It can be used for single monitoring or simultaneous monitoring. Pressure testing includes the following steps: Step 1: Fine cooling is running normally, and the pressure detection device begins to detect the pipeline status; Step 2: Determine the pipeline status based on the abnormal state of the model tolerance, and connect the plate status corresponding to the tension deviation value detected by the plate roller to the detection system; Step 3: Abnormal rib formation (large tension deviation value): Determine that the nozzles of the corresponding section of the fine cooling system in this area should be in the closed state, i.e., not spraying emulsion; Step 4: Verify on-site via video footage whether the pressure detection device's push rod is in a raised state (i.e., the air pipe is pressurized while the injection valve is closed); Step 5: Indentation anomaly (small tension deviation value): Determine that the nozzle of the corresponding section of the fine cooling system in this area should be in the open state, i.e., spraying emulsion; Step 6: Verify on-site via video footage whether the pressure monitoring device's push rod is in the reset state (i.e., the air tube is under no pressure while the injection valve is open); Step 7: Use the rolling gap to process the air reversing valve of the corresponding circuit; Step 8: If the actual situation on-site is still contrary to what it should be, further inspection and processing are required until it returns to normal. Flood monitoring includes the following steps: Step 1: Fine cooling is running normally, and the water immersion detection device begins to detect the pipeline status; Step 2: Damage or collapse of the injection valve seal causes a functional defect, resulting in emulsion flowing back from the injection valve piston seal into the air pipe; Step 3: As production continues and the number of sprays increases, the amount of fluid accumulating in the trachea will also increase. Step 4: When the amount of emulsion in the trachea rises to the device for monitoring a small amount of emulsion, it begins to change color under the action of the test strip, which can be observed through online video. Step 5: As the amount of emulsion increases, the color band on the test strip lengthens; Step 5: As the amount of emulsion in the trachea continues to rise, the emulsion will seep into the device for monitoring large amounts of emulsion. Step 6: When the circuit is short-circuited, the indicator light will illuminate. The more emulsion there is, the stronger the conductivity, and the brighter the light will be. This can be indicated by an online alarm. Step 7: Use the rolling gap to process the air pipes of the corresponding circuit.

Images