cooling device

Abstract

The cooling device comprises a first header, a plurality of nozzles are arranged on the first header at intervals, and a first water nozzle is arranged in the middle of the first header, wherein the diameter of the first water nozzle is larger than that of the nozzles, and the nozzles and the first water nozzle are used for spraying cooling liquid to the pinch roll; a second header, a plurality of nozzles are arranged on the second header at intervals, and a second water nozzle is arranged in the middle of the second header, wherein the diameter of the second water nozzle is smaller than that of the nozzles, and the nozzles and the second water nozzle are used for spraying cooling liquid to the pinch roll; a wear detection part used for detecting the wear condition of the middle part of the pinch roll; and a controller used for controlling the first header or the second header to spray cooling liquid to the pinch roll according to the wear condition detected by the wear detection part. In this way, different temperature cooling is realized for the axial partition of the pinch roll, the convex roll type formed in the middle part of the pinch roll is slowed down, the adverse effects of the concave roll type can be offset, the roll type control of the pinch roll is realized, and the stable transmission of the strip steel is ensured.

Description

Technical Field

[0001] This disclosure relates to the technical field of cooling devices for take-up pinch rolls, and more particularly to a cooling device. Background Technology

[0002] A pinch roll is a device positioned before the coiler to convey strip steel using roller pressure. When the strip head reaches the pinch roll, it is pre-bent to facilitate entry into the coiler. Once the strip is stably coiled, the pinch roll maintains speed synchronization with the coil drum and distributes tension appropriately between the finishing mill and the coiler to ensure coil shape. After the strip tail leaves the finishing mill, the pinch roll operates with a certain lag rate, providing some dragging effect on the strip tail. Throughout the entire coiling process, the pinch roll participates in the conveying, and the roll gap shape plays a crucial role in the stable transmission of the strip steel.

[0003] Because pinch rolls have a long service life and operate at high temperatures, flat pinch rolls can develop a convex shape in the early stages of their service life due to contact between the middle part and the strip. If the strip does not enter the coiler in a centered state, this convex shape will exacerbate strip deviation, leading to uncontrolled coiling or edge breakage defects on one side of the strip. When pinch rolls have been used for a long time and are heavily worn, the thermal convexity of the pinch roll itself is insufficient to compensate for the wear at the roll gap, resulting in a concave shape. This reduces the effectiveness of the pinch roll or even causes it to fail, resulting in arching at the strip side guide plate and the coiler, causing quality defects such as edge breakage, folding defects, and even accidents.

[0004] Therefore, it is necessary to propose a cooling device to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this disclosure provides a cooling device;

[0007] In view of this, a cooling device is provided according to an embodiment of the present disclosure, comprising:

[0008] The first manifold has multiple nozzles spaced apart on it, and a first water nozzle is provided in the middle of the first manifold. The diameter of the first water nozzle is larger than that of the nozzle. The nozzles and the first water nozzle are used to spray coolant onto the pinch roller.

[0009] The second manifold has multiple nozzles spaced apart on it, and a second water nozzle is provided in the middle of the second manifold. The diameter of the second water nozzle is smaller than that of the nozzle. The nozzle and the second water nozzle are used to spray coolant onto the pinch roller.

[0010] Wear detection unit, used to detect wear in the middle of the pinch roller;

[0011] The controller is used to control the first or second manifold to spray coolant onto the pinch rollers based on the wear condition detected by the wear detection unit.

[0012] In one feasible implementation, the diameter of the first water nozzle is 8mm to 10mm;

[0013] The nozzle diameter is 6mm to 7mm.

[0014] In one feasible implementation, the diameter of the second water nozzle is 4mm to 6mm.

[0015] In one feasible implementation, the wear detection unit includes:

[0016] Distance detection component, used to detect the effective rotational distance value of the pinch roller;

[0017] Wear detection component, used to detect the wear amount in the middle of the pinch roller;

[0018] The defining unit is used to divide the wear degree range and determine the rotation distance value and the wear degree range in which the wear amount is located;

[0019] When both the effective rotation distance and the amount of wear are within the first wear level range, the controller controls the first manifold to spray coolant onto the pinch roller.

[0020] If at least one of the effective rotation distance and wear amount exceeds the first wear degree range and is within the second wear degree range, the controller controls the second manifold to spray coolant onto the pinch roller;

[0021] The wear range includes the effective rotation distance range and the wear amount range.

[0022] In one feasible implementation, it further includes:

[0023] An alarm will sound to warn that the pinch roller is scrap if at least one of the rotational distance or wear exceeds the second wear level range.

[0024] In one feasible implementation, it further includes:

[0025] The three-way structure includes a first channel, a second channel, and a third channel;

[0026] The first channel is used to connect to the coolant source;

[0027] The second channel connects to the first water tap and nozzle of the first manifold;

[0028] The third channel connects to the second water tap and nozzle of the second manifold;

[0029] Adjusting element, used to adjust the connection status of the three channels of the tee structure.

[0030] In one feasible implementation, the regulating element is a valve plug and a driving element, wherein when the first manifold is used to spray coolant, the driving element drives the valve plug to block the third channel, and the first channel and the second channel are connected.

[0031] When using the second manifold to spray coolant, the drive valve blocks the second channel, and the first and third channels are connected.

[0032] In one feasible implementation, it further includes:

[0033] A fixed frame is used to fix the cooling device to the fixed beam of the pinch roller.

[0034] In one feasible implementation, it further includes:

[0035] An adjustment structure is provided, in which the first manifold and the second manifold are respectively connected. The angle and position of the first manifold and the second manifold relative to the pinch roller are adjusted by the adjustment structure.

[0036] Among them, when both the effective rotation distance and the amount of wear are within the first wear degree range, the controller controls the adjustment structure to adjust the first manifold to correspond to the pinch roller;

[0037] When at least one of the effective rotation distance and wear amount exceeds the first wear degree range and is located in the second wear degree range, the controller controls the adjustment structure to adjust the second manifold to correspond to the pinch roller.

[0038] In one feasible implementation, two cooling devices are provided, one corresponding to the upper pinch roll and the other corresponding to the lower pinch roll.

[0039] Compared to the prior art, this disclosure includes at least the following beneficial effects: The cooling device provided in the embodiments of this disclosure is used for winding pinch rolls. The cooling device is provided with a first manifold, a second manifold, a wear detection unit, and a controller. The first manifold has multiple nozzles spaced apart, and a first water nozzle is located at the center of the first manifold where it contacts the strip. The diameter of the first water nozzle is larger than the diameter of the nozzle. The first manifold can spray coolant onto the pinch roll through the nozzles and the first water nozzle, and the cooling efficiency at the first water nozzle is greater than that at the nozzle. The second manifold has multiple nozzles spaced apart, and a second water nozzle is located at the center of the second manifold where it contacts the strip. The diameter of the second water nozzle is smaller than that of the nozzle. The second manifold can spray coolant onto the pinch roll through the nozzles and the second water nozzle, and the cooling efficiency at the second water nozzle is less than that at the nozzle. The wear detection unit can be used to detect the degree of wear at the position corresponding to the strip in the center of the pinch roll. The controller can control the first and second manifolds to spray coolant onto the pinch roll based on the wear condition detected by the wear detection unit. Specifically, when there is less wear in the middle of the pinch roll, the controller controls the first manifold to spray coolant onto the pinch roll to improve the cooling effect on the middle of the pinch roll, thereby slowing down the formation of a convex roll shape in the middle of the pinch roll, reducing wear in the middle of the pinch roll, and ensuring stable strip transport. When there is more wear in the middle of the pinch roll, and the thermal convexity of the pinch roll itself is insufficient to compensate for the wear at the roll gap, resulting in a concave roll shape, the controller controls the second manifold to spray coolant onto the pinch roll, thereby appropriately reducing the cooling effect on the middle of the pinch roll, which helps to form thermal convexity, compensates for the concave roll shape formed by wear, ensures stable strip transport, and improves reliability. This setting allows for axial partitioning of the pinch roll to achieve different temperature cooling, realizes roll shape control of the pinch roll, slows down the formation of a convex roll shape in the middle of the pinch roll, and avoids strip deviation, strip coil shape loss control, and strip edge breakage defects. It can also offset the adverse effects of the formation of a concave roll shape in the middle of the pinch roll, and avoid pinch roll failure, strip tail arching, strip edge breakage defects, and folding defects. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This is a schematic structural diagram of a cooling device according to an embodiment of the present disclosure;

[0042] Figure 2 This is a schematic assembly diagram of a cooling device and a pinch roller according to one embodiment of the present disclosure.

[0043] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0044] 100 Cooling device, 110 First manifold, 111 Nozzle, 112 First water nozzle, 120 Second manifold, 121 Second water nozzle, 130 T-shaped structure, 131 First channel, 132 Second channel, 133 Third channel, 134 Valve plug, 200 Pinch roller, 210 Strip steel. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0046] like Figure 1 and Figure 2 As shown, a cooling device is proposed according to an embodiment of this disclosure, comprising: a first manifold, on which a plurality of nozzles are spaced apart, and a first water nozzle is disposed in the middle of the first manifold, the diameter of the first water nozzle being larger than the diameter of the nozzles, wherein the nozzles and the first water nozzle are used to spray coolant onto the pinch roll; a second manifold, on which a plurality of nozzles are spaced apart, and a second water nozzle is disposed in the middle of the second manifold, the diameter of the second water nozzle being smaller than the diameter of the nozzles, wherein the nozzles and the second water nozzle are used to spray coolant onto the pinch roll; a wear detection unit for detecting the wear condition of the middle part of the pinch roll; and a controller for controlling the first manifold or the second manifold to spray coolant onto the pinch roll according to the wear condition detected by the wear detection unit.

[0047] It is understood that the cooling device provided in this embodiment is used for winding pinch rolls. The cooling device includes a first manifold, a second manifold, a wear detection unit, and a controller. The first manifold has multiple nozzles spaced apart, and a first water nozzle is located at the center of the first manifold where it contacts the strip. The diameter of the first water nozzle is larger than the diameter of the nozzle. The first manifold can spray coolant onto the pinch roll through the nozzles and the first water nozzle, and the cooling efficiency at the first water nozzle is greater than that at the nozzle. The second manifold has multiple nozzles spaced apart, and a second water nozzle is located at the center of the second manifold where it contacts the strip. The diameter of the second water nozzle is smaller than that of the nozzle. The second manifold can spray coolant onto the pinch roll through the nozzles and the second water nozzle, and the cooling efficiency at the second water nozzle is less than that at the nozzle. The wear detection unit can be used to detect the degree of wear at the center of the pinch roll corresponding to the strip. The controller can control the first and second manifolds to spray coolant onto the pinch roll based on the wear condition detected by the wear detection unit. Specifically, when there is less wear in the middle of the pinch roll, the controller controls the first manifold to spray coolant onto the pinch roll to improve the cooling effect on the middle of the pinch roll, thereby slowing down the formation of a convex roll shape in the middle of the pinch roll, reducing wear in the middle of the pinch roll, and ensuring stable strip transport. When there is more wear in the middle of the pinch roll, and the thermal convexity of the pinch roll itself is insufficient to compensate for the wear at the roll gap, resulting in a concave roll shape, the controller controls the second manifold to spray coolant onto the pinch roll, thereby appropriately reducing the cooling effect on the middle of the pinch roll, which helps to form thermal convexity, compensates for the concave roll shape formed by wear, ensures stable strip transport, and improves reliability. This setting allows for axial partitioning of the pinch roll to achieve different temperature cooling, realizes roll shape control of the pinch roll, slows down the formation of a convex roll shape in the middle of the pinch roll, and avoids strip deviation, strip coil shape loss control, and strip edge breakage defects. It can also offset the adverse effects of the formation of a concave roll shape in the middle of the pinch roll, and avoid pinch roll failure, strip tail arching, strip edge breakage defects, and folding defects.

[0048] For example, the first manifold is provided with four nozzles and three first water nozzles, with the distance between adjacent nozzles being equal, the distance between adjacent first water nozzles being equal, and the four nozzles being symmetrically distributed on both sides of the three first water nozzles. The second manifold is provided with four nozzles and three second water nozzles, with the distance between adjacent nozzles being equal, the distance between adjacent second water nozzles being equal, and the four nozzles being symmetrically distributed on both sides of the three second water nozzles.

[0049] In some examples, the diameter of the first water nozzle is 8mm to 10mm; the diameter of the nozzle is 6mm to 7mm.

[0050] Understandably, the diameter of the first water nozzle can be set to 8mm to 10mm, and the diameter of the nozzle can be 6mm to 7mm, to ensure that the diameter of the first water nozzle is appropriate and larger than the diameter of the nozzle, so that the cooling effect of the first water nozzle is greater than that of the nozzle, effectively slowing down the formation of thermal bulges and avoiding strip deviation, strip coiling loss control, and strip edge breakage defects.

[0051] In some examples, the diameter of the second faucet is 4mm to 6mm.

[0052] Understandably, the second water nozzle has a diameter of 4mm to 6mm, and the main nozzle has a diameter of 6mm to 7mm. This ensures that the second water nozzle has a suitable diameter, which is smaller than the main nozzle's diameter, making the cooling effect of the first water nozzle less than that of the main nozzle. This appropriately reduces the cooling effect on the middle of the pinch roll, which helps in the formation of thermal protrusions and compensates for the concave roll shape caused by wear. This counteracts the adverse effects of the concave roll shape in the middle of the pinch roll, preventing pinch roll failure, strip tail arching, strip edge breakage defects, and folding defects. This ensures stable strip transport and improves reliability.

[0053] In some examples, the wear detection unit includes: a distance detection element for detecting the rotational distance value of the pinch roll; a wear amount detection element for detecting the wear amount at the middle of the pinch roll; and a defining unit for dividing the wear degree range and determining the wear degree range in which the rotational distance value and the wear amount are located; wherein, when both the rotational distance value and the wear amount are within the first wear degree range, the controller controls the first manifold to spray coolant onto the pinch roll; when at least one of the rotational distance value and the wear amount exceeds the first wear degree range and is located within the second wear degree range, the controller controls the second manifold to spray coolant onto the pinch roll; the wear degree range includes the rotational distance range and the wear amount range.

[0054] Understandably, the wear detection unit includes a distance detection element, a wear amount detection element, and a defining unit. The distance detection element measures the effective rotational distance of the pinch roll, i.e., the actual effective distance between the pinch roll and the strip. The wear amount detection element measures the outer diameter of the pinch roll's center when it is not in operation, thus determining the wear amount at the center of the pinch roll. The defining unit divides the wear into a first wear degree range and a second wear degree range. The first wear degree range includes a first effective rotational distance range and a first wear amount range; the second wear degree range includes a second effective rotational distance range and a second wear amount range. The defining unit determines the current wear degree range of the pinch roll based on the effective rotational distance value falling within the effective rotational distance range and the wear amount falling within the wear amount range. The defining unit is electrically connected to the controller. When both the effective rotation distance and the amount of wear are within the first wear level range, that is, when the effective rotation distance is within the first rotation distance range and the amount of wear is within the first wear level range, the controller controls the first manifold to spray coolant onto the pinch rolls to effectively slow down the formation of thermal protrusions and avoid strip deviation, strip coil shape loss, and strip edge breakage defects.

[0055] When at least one of the effective rotation distance and wear amount exceeds the first wear level range and falls within the second wear level range (i.e., the effective rotation distance is in the first rotation distance range and the wear amount is in the second wear amount range; or the effective rotation distance is in the second rotation distance range and the wear amount is in the first wear amount range; or the effective rotation distance is in the second rotation distance range and the wear amount is in the second wear amount range), the controller controls the second manifold to spray coolant onto the pinch roll, thereby appropriately reducing the cooling effect on the middle of the pinch roll. This helps to form thermal protrusions, compensates for the concave roll shape formed by wear, and counteracts the adverse effects caused by the formation of a concave roll shape in the middle of the pinch roll, avoiding pinch roll failure, strip tail arching, strip edge breakage defects, and folding defects. This ensures stable strip transmission and improves reliability.

[0056] In some examples, an alarm is also included that issues a warning that the pinch roll is scrap if at least one of the rotational distance value and the amount of wear exceeds the second wear level range.

[0057] Understandably, the cooling system is also equipped with an alarm. Specifically, if at least one of the effective rotation distance and wear exceeds the second wear level range—that is, the effective rotation distance is within the second rotation distance range while the wear exceeds the second wear level range; or the effective rotation distance exceeds the second rotation distance range while the wear is within the second wear level range; or the effective rotation distance exceeds the second rotation distance range while the wear exceeds the second wear level range—it indicates that the pinch roll is worn too much and cannot meet the working requirements, necessitating replacement. The controller will then activate the alarm with both sound and light to immediately remind personnel to replace the pinch roll. This ensures stable subsequent strip transport and improves reliability.

[0058] In some examples, such as Figure 1 and Figure 2 As shown, it also includes: a three-way structure, which includes a first channel, a second channel and a third channel; wherein, the first channel is used to connect to the coolant source through the pump body; the second channel is connected to the first water nozzle and the nozzle of the first manifold; the third channel is connected to the second water nozzle and the nozzle of the second manifold; and an adjusting component is used to adjust the connection state of the three channels of the three-way structure.

[0059] Understandably, the cooling device also includes a three-way structure and an adjusting mechanism. Specifically, the three-way structure has a first channel, a second channel, and a third channel. The first channel is connected to the coolant source via a pump body. The second channel is connected to the first water nozzle and the first water spout of the first manifold, and the third channel is connected to the second water spout and the second water spout of the second manifold. With this configuration, when the adjusting mechanism closes the third channel and connects the first and second channels, the pump body pumps the coolant from the coolant source to the first water spout and the first water spout of the first manifold, thus spraying coolant onto the pinch rollers through the first manifold. When the adjusting mechanism closes the second channel and connects the first and third channels, the pump body pumps the coolant from the coolant source to the second water spout and the second water spout of the second manifold, thus spraying coolant onto the pinch rollers through the second manifold.

[0060] In some examples, such as Figure 1 and Figure 2 As shown, the regulating components are a valve plug and a driving component. When the first manifold is used to spray coolant, the driving component drives the valve plug to block the third channel, and the first and second channels are connected. When the second manifold is used to spray coolant, the driving component drives the valve plug to block the second channel, and the first and third channels are connected.

[0061] It is understandable that the regulating component can be a valve plug or a driving component. Specifically, when using the first manifold to spray coolant, the driving component moves the valve plug between the first and third channels to block the third channel and connect the first and second channels. When using the second manifold to spray coolant, the driving component moves the valve plug between the first and second channels to block the second channel and connect the first and third channels.

[0062] In some examples, it also includes: a fixing frame that secures the cooling device to the fixing beam of the pinch roller.

[0063] Understandably, the cooling device is also equipped with a fixed frame. The fixed frame can be used to fix the cooling device to the fixed beam of the pinch roller, thereby ensuring that the cooling device stably cools the pinch roller and improving reliability.

[0064] In some examples, the system further includes an adjustment structure, to which a first manifold and a second manifold are respectively connected, and the adjustment structure adjusts the angle and position of the first manifold and the second manifold relative to the pinch roller, respectively; wherein, when both the effective rotation distance and the amount of wear are within a first wear degree range, the controller controls the adjustment structure to adjust the first manifold to correspond to the pinch roller; when at least one of the effective rotation distance and the amount of wear exceeds the first wear degree range and is located in a second wear degree range, the controller controls the adjustment structure to adjust the second manifold to correspond to the pinch roller.

[0065] Understandably, the cooling device also includes an adjustment structure. The first and second manifolds are respectively connected to the adjustment structure, and the adjustment result is electrically connected to the controller. The controller can control the adjustment structure to adjust the angle and position of the first or second manifold relative to the pinch roller. Specifically, when both the effective rotation distance and the amount of wear are within the first wear level range, the controller controls the adjustment structure to adjust the first manifold to the working position so that the first manifold corresponds to the pinch roller. When at least one of the effective rotation distance and the amount of wear exceeds the first wear level range and is within the second wear level range, the controller controls the adjustment structure to adjust the second manifold to the working position so that the second manifold corresponds to the pinch roller.

[0066] In some examples, such as Figure 2 As shown, there are two cooling devices, one for the upper pinch roller and the other for the lower pinch roller.

[0067] Understandably, there can be two cooling devices to cool the upper and lower pinch rolls respectively, ensuring the cooling effect.

[0068] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0069] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0070] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention and simplifying the description, and do not 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 invention.

[0071] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0072] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0073] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0074] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0075] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A cooling device, characterized in that, include: A first manifold has multiple nozzles spaced apart on it, and a first water nozzle is located in the middle of the first manifold. The diameter of the first water nozzle is larger than that of the nozzle. The nozzles and the first water nozzle are used to spray coolant onto the pinch roller. The cooling efficiency at the first water nozzle is greater than that at the nozzle. A second manifold is provided with a plurality of nozzles spaced apart on it, and a second water nozzle is provided in the middle of the second manifold. The diameter of the second water nozzle is smaller than that of the nozzle. The nozzles and the second water nozzle are used to spray coolant onto the pinch roller. The cooling efficiency at the second water nozzle is lower than that at the nozzle. The wear detection unit is used to detect the wear condition of the middle part of the pinch roller; The controller is used to control the first manifold or the second manifold to spray coolant onto the pinch roller based on the wear condition detected by the wear detection unit. The wear detection unit includes: A distance detection element is used to detect the effective rotational distance value of the pinch roller; Wear detection component, used to detect the wear amount in the middle of the pinch roller; A defining unit is used to divide the wear degree range and determine the effective rotation distance value and the wear degree range in which the wear amount is located; Wherein, when both the effective rotation distance and the wear amount are within the first wear degree range, the controller controls the first manifold to spray coolant onto the pinch roller; If at least one of the effective rotation distance value and the wear amount exceeds the first wear degree range and is located in the second wear degree range, the controller controls the second manifold to spray coolant onto the pinch roller; Also includes: An adjustment structure is provided, wherein the first manifold and the second manifold are respectively connected to the adjustment structure, and the angle and position of the first manifold and the second manifold relative to the pinch roller are respectively adjusted by the adjustment structure. Wherein, when both the effective rotation distance and the wear amount are within the first wear degree range, the controller controls the adjustment structure to adjust the first manifold to correspond to the pinch roller; If at least one of the effective rotation distance value and the wear amount exceeds the first wear degree range and is located within the second wear degree range, the controller controls the adjustment structure to adjust the second manifold to correspond to the pinch roller.

2. The cooling device according to claim 1, characterized in that, The diameter of the first water tap is 8mm to 10mm; The nozzle has a diameter of 6mm to 7mm.

3. The cooling device according to claim 2, characterized in that, The second water tap has a diameter of 4mm.

4. The cooling device according to claim 1, characterized in that, Also includes: An alarm is triggered when at least one of the rotation distance value and the wear amount exceeds the second wear level range, indicating that the pinch roller is beyond repair.

5. The cooling device according to claim 1, characterized in that, Also includes: The three-way structure includes a first channel, a second channel, and a third channel; The first channel is used to connect to a coolant source; The second channel is connected to the first water tap and the nozzle of the first manifold; The third channel is connected to the second water spout and the nozzle in the second manifold; Adjusting element, used to adjust the connection state of the three channels of the three-way structure.

6. The cooling device according to claim 5, characterized in that, The regulating component is a valve plug and a driving component. When the first manifold is used to spray coolant, the driving component drives the valve plug to block the third channel, and the first channel and the second channel are connected. When the second manifold is used to spray coolant, the drive unit drives the valve plug to block the second channel, and the first channel and the third channel are connected.

7. The cooling device according to any one of claims 1 to 6, characterized in that, Also includes: A fixed frame is used to fix the cooling device to the fixed beam of the pinch roller.

8. The cooling device according to any one of claims 1 to 6, characterized in that, Two cooling devices are provided, one for the upper pinch roller and the other for the lower pinch roller.

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