Laminar cooling reverse spraying device and hot rolled strip rolling mill system

Abstract

The utility model discloses a laminar cooling reverse spraying device and a hot rolled strip rolling mill system. The technical problems that cooling water is prone to being left on an existing laminar cooling surface, and a collecting pipe is prone to being damaged are solved. The laminar cooling reverse spraying device is applied to a hot-rolled strip rolling mill and comprises a stand column, a driving assembly, a spraying assembly, a connecting piece and a buffering assembly. The spraying assembly comprises a material spraying source, a collecting pipe and a spraying head; the connecting piece comprises a connecting part and a communicating part, the communicating part is communicated with the collecting pipe, and the other end is communicated with a material spraying source; the buffering assembly comprises a fixed part and a buffering part, the fixed part comprises a fixed pressing ring and a movable pressing ring, the fixed pressing ring is connected with the output end of the driving assembly, and the buffering part abuts against the movable pressing ring; the driving assembly drives the collecting pipe to rotate, the function of avoiding strip steel collision can be achieved, the buffering assembly is arranged, the collecting pipe is prevented from being damaged under the uncontrollable condition, and therefore the height of the collecting pipe can be adjusted to be the appropriate distance from the running strip steel, the water sealing effect is improved, and the reverse spraying collecting pipe can stably run for a long time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laminar cooling, and particularly relates to a laminar cooling reverse spraying device and a hot rolling strip mill system. BACKGROUND

[0002] A coiling temperature control system of a hot rolling strip mill is an important part of a hot continuous rolling system, directly affects the organizational structure and mechanical properties of finished strip steel, and has a great influence on the finished product quality of the finished strip steel. After the strip steel is rolled, cooling is carried out by changing the cooling conditions after rolling to control the organizational state of the strip steel. The laminar cooling is composed of multiple header groups and heat detectors, and is divided into a fine adjustment area and a fine adjustment area. Different header groups spray water through multiple mode control to achieve the required cooling effect, so as to obtain the required metallographic structure. In order to ensure the segmentation of each area and accurately control the cooling section, a side spraying or reverse spraying device needs to be added in each interval to prevent the cooling water from remaining on the surface of the strip steel for too long, affecting the temperature of the strip steel, and further affecting the organizational performance of the strip steel.

[0003] When the laminar flow adopts reverse spraying to seal water, in order to prevent the header group from being damaged when the strip steel is tilted, the header group is arranged at a high position, and the sealing water area occupies a large vertical space. If the height is lowered, there is a risk of impact, causing damage to the header group. SUMMARY

[0004] To solve the above technical problems, the application provides a laminar cooling reverse spraying device and a hot rolling strip mill system.

[0005] The technical scheme adopted to achieve the purpose of the application is a laminar cooling reverse spraying device applied to a hot rolling strip mill, comprising:

[0006] a stand;

[0007] a driving assembly arranged in the stand;

[0008] a spraying assembly comprising a spraying source, a header group, and a nozzle arranged in the header group;

[0009] a connecting piece comprising a connecting part and a communicating part connected to each other, one end of the communicating part being in communication with the header group, and the other end being in communication with the spraying source;

[0010] a buffer assembly comprising a fixed part and a buffer part, the fixed part comprising a fixed pressure ring and a movable pressure ring connected to each other, the fixed pressure ring being connected to the output end of the driving assembly, the fixed pressure ring and the movable pressure ring enclosing an installation space for installing the connecting part, and the buffer part being in abutment with the movable pressure ring;

[0011] When the header is impacted by external force, the header acts on the movable compression ring through the connecting part, the movable compression ring moves relative to the fixed compression ring and extrudes the buffer member, so that the connecting part rotates in the mounting space; when the header is not impacted by external force, the movable compression ring is stationary relative to the fixed compression ring to limit and fix the connecting part.

[0012] In some embodiments, the connecting part is in the shape of an inverted T, and the horizontal rod of the connecting part is located in the mounting space; the movable compression ring is provided with a through hole, and the vertical rod of the connecting part penetrates through the through hole and is connected with the connecting part.

[0013] In some embodiments, the connecting part is in the shape of a T, the horizontal section of the connecting part is in a hollow structure, the vertical section of the connecting part is in a solid structure, and the vertical section of the connecting part is connected with the vertical rod of the connecting part.

[0014] In some embodiments, the fixed compression ring and the movable compression ring are arranged in an up-down manner; the buffer assembly further comprises a fastener, the movable compression ring is connected with the fixed compression ring through the fastener, the fastener comprises a bolt and a nut, the movable compression ring and the fixed compression ring are provided with corresponding connecting holes, the bolt penetrates through the connecting holes and is fixed through the nut, and the buffer member is sleeved on the bolt and in contact with the movable compression ring.

[0015] In some embodiments, the fixed compression ring comprises a compression part and a rotating part connected with each other, the rotating part is connected with the output end of the driving assembly, and the compression part cooperates with the movable compression ring.

[0016] In some embodiments, the connecting part is provided with a counterweight on the side away from the header, the counterweight is internally provided with a communication hole, the connecting part penetrates through the communication hole and is connected with the counterweight, and the material source is arranged in the counterweight and is in communication with the connecting part.

[0017] In some embodiments, the driving assembly is a gear-reducing motor.

[0018] In some embodiments, the stand is a telescopic stand.

[0019] The material source is a gas source.

[0020] In a second aspect, the application provides a hot strip mill system, comprising:

[0021] The laminar cooling reverse spraying device described above;

[0022] The hot strip mill, and the spraying direction of the header of the laminar cooling reverse spraying device is arranged at an angle to the conveying direction of the hot strip mill.

[0023] In some embodiments, the included angle between the jetting direction of the header and the conveying direction of the hot strip rolling mill is an acute angle.

[0024] From the above technical solution, the application provides a laminar cooling reverse spraying device and a hot strip rolling mill system. The laminar cooling reverse spraying device is applied to a hot strip rolling mill and includes a stand, a driving assembly, a spraying assembly, a connecting piece, and a buffer assembly. The driving assembly is arranged on the stand. The spraying assembly includes a spraying material source, a header, and a nozzle arranged on the header. The connecting piece includes a connecting part and a communicating part connected to each other. One end of the communicating part is communicated with the header, and the other end is communicated with the spraying material source. The buffer assembly includes a fixing piece and a buffer piece. The fixing piece includes a fixed pressure ring and a movable pressure ring connected to each other. The fixed pressure ring is connected with the output end of the driving assembly. The fixed pressure ring and the movable pressure ring enclose an installation space for installing the connecting part. The buffer piece is in abutment with the movable pressure ring. In the case that the header avoids external force impact, the movable pressure ring is stationary relative to the fixed pressure ring to position and fix the connecting part. The driving assembly drives the header to rotate through the buffer assembly and the connecting piece. In the case that the header is impacted by external force, the header acts on the movable pressure ring through the connecting part. The movable pressure ring moves relative to the fixed pressure ring and presses the buffer piece, so that the connecting part rotates in the installation space. The reverse spraying device can make the reverse spraying header run stably for a long time through the driving assembly and the buffer assembly. That is, the driving assembly can drive the header to rotate to realize the function of quickly avoiding the impact of the strip. Through the buffer assembly, the header can be prevented from being damaged in an uncontrollable situation, so that the header and the strip can have a suitable height difference. In addition, since the height of the header and the distance from the strip are suitable, the reverse spraying device can ensure the performance of the strip, improve the water sealing effect, eliminate the residual cooling water on the surface of the strip, reduce the residual cooling water on the surface of the strip, avoid uneven transverse cooling of the strip, and finally cause the plate shape to be bad. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic diagram of a laminar cooling reverse spraying device in an embodiment of the application.

[0026] Figure 2 FIG. 4 is a structural schematic diagram of a connecting piece and a buffer assembly connected to each other in an embodiment of the application.

[0027] Figure 3 FIG. 5 is a side view of the structure of the laminar cooling reverse spraying device in an embodiment of the application.

[0028] Figure 4 FIG. 6 is a top view of the fixed pressure ring in an embodiment of the application.

[0029] The reference numerals are explained as follows: 100, laminar cooling reverse spraying device; 110, stand; 120, driving assembly; 121, driving housing; 130, spraying assembly; 131, spraying source; 132, header; 133, nozzle; 140, connecting piece; 141, connecting part; 142, communicating part; 143, first joint; 150, buffering assembly; 151, fixing piece; 1511, fixed pressure ring; 1512, movable pressure ring; 152, buffering piece; 153, fastening piece; 1531, bolt; 1532, nut; 160, counterweight. DETAILED DESCRIPTION

[0030] In order to make the skilled in the art to which the present application belongs more clearly understand the present application, the technical solutions of the present application are described in detail below with specific embodiments in combination with the drawings.

[0031] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , in the embodiments of the present application, a laminar cooling reverse spraying device 100 is applied to a hot rolling strip mill, and specifically can be applied to a laminar cooling area of the hot rolling strip mill. The laminar cooling reverse spraying device 100 comprises a stand 110, a driving assembly 120, a spraying assembly 130, a connecting piece 140 and a buffering assembly 150. The driving assembly 120 is arranged on the stand 110. The spraying assembly 130 comprises a spraying source 131, a header 132 and a nozzle 133 arranged on the header 132. The connecting piece 140 comprises a connecting part 141 and a communicating part 142 connected with each other. One end of the communicating part 142 is communicated with the header 132, and the other end is communicated with the spraying source 131. The buffering assembly 150 comprises a fixing piece 151 and a buffering piece 152. The fixing piece 151 comprises a fixed pressure ring 1511 and a movable pressure ring 1512 connected with each other. The fixed pressure ring 1511 is connected with an output end of the driving assembly 120. The fixed pressure ring 1511 and the movable pressure ring 1512 enclose an installation space for installing the connecting part 141. The buffering piece 152 is abutted with the movable pressure ring 1512. In the case that the header 132 avoids external force impact, the movable pressure ring 1512 is stationary relative to the fixed pressure ring 1511 to limit and fix the connecting part 141. The driving assembly 120 drives the header 132 to rotate through the buffering assembly 150 and the connecting piece 140. In the case that the header 132 is impacted by external force, the header 132 acts on the movable pressure ring 1512 through the connecting part 141. The movable pressure ring 1512 moves relative to the fixed pressure ring 1511 and presses the buffering piece 152, so that the connecting part 141 rotates in the installation space.

[0032] As shown in Figure 1 and Figure 3As shown, the driving assembly 120 can drive the manifold 132 to rotate, i.e., powered, to realize the rotation of the manifold 132. The buffer assembly 150 includes a fixed part 151 and a buffer part 152, which can prevent accidental damage to the manifold 132 due to equipment failure and external force.

[0033] As shown in Figure 1 and Figure 3 under normal circumstances, the manifold 132 can be driven by the driving assembly 120, i.e., the driving assembly 120 rotates through the buffer assembly 150, the buffer assembly 150 drives the manifold 132 to rotate, thereby avoiding the damage of the strip head to the manifold 132; if the driving assembly 120 is damaged or the strip is not detected in time, the strip hits the manifold 132, the movable pressure ring 1512 can be moved and extruded by the buffer part 152 through the connecting part 140, thereby increasing the installation space surrounded by the movable pressure ring 1512 and the fixed pressure ring 1511, and the connecting part 141 can be movable in the installation space, i.e., the fixed pressure ring 1511 is stationary, so that in the case of strip hitting the manifold 132, the buffer assembly 150 can drive the manifold 132 to rotate, avoiding the damage of the manifold 132 due to the fixed position, thereby weakening the impact of the strip on the manifold 132.

[0034] Therefore, the reverse spray device of the present application can make the reverse spray manifold run stably for a long time through the driving assembly and the buffer assembly. That is, the driving assembly 120 drives the manifold 132 to rotate, realizing the function of quickly avoiding the impact of the strip, and the buffer assembly 150 prevents the damage of the manifold 132 under uncontrollable conditions, thereby ensuring that the manifold and the strip have a suitable height difference. In addition, due to the suitable height of the manifold and the distance from the strip, the reverse spray device can ensure the performance of the strip, improve the sealing effect, thereby eliminating the residual cooling water on the surface of the strip, reducing the residual cooling water on the surface of the strip, avoiding uneven transverse cooling of the strip, and ultimately leading to poor plate shape.

[0035] As shown in Figure 2 in some embodiments, the connecting part 141 is in the shape of an inverted T, and the horizontal rod of the connecting part 141 is located in the installation space; the movable pressure ring 1512 is provided with a through hole, and the vertical rod of the connecting part 141 penetrates the through hole and is connected with the connecting part 141. It can ensure that the movable pressure ring 1512 and the fixed pressure ring 1511 can fix the horizontal rod of the connecting part 141, and the vertical rod of the connecting part 141 can be connected and fixed above the movable pressure ring 1512.

[0036] As shown in Figure 1 and Figure 2As shown in the drawings, in some embodiments, the communication part 142 is T-shaped, the horizontal section of the communication part 142 is a hollow structure, the vertical section of the communication part 142 is a solid structure, the vertical section of the communication part 142 is connected with the vertical rod of the connecting part 141, one end of the horizontal section of the communication part 142 is communicated with the header 132, and the other end of the horizontal section of the communication part 142 is communicated with the material source 131. In some embodiments, the horizontal section of the communication part 142 is communicated with the header 132 through the first joint 143, the first joint 143 can be threadedly connected with the header 132 and the horizontal section of the communication part 142, which facilitates the connection of the first joint 143 with the header 132 and the horizontal section of the communication part 142, facilitates the quick replacement of the damaged header 132, and avoids the overall replacement of the entire laminar cooling reverse spraying device 100. In other embodiments, the vertical section of the communication part 142 is connected with the vertical rod of the connecting part 141, which can be detachable connection or welded connection.

[0037] As shown in the drawings, Figure 2 In some embodiments, the fixed compression ring 1511 and the movable compression ring 1512 are arranged in an upper and lower interval; the buffer assembly 150 further comprises a fastener 153, the movable compression ring 1512 is connected with the fixed compression ring 1511 through the fastener 153, the fastener 153 comprises a bolt 1531 and a nut 1532, the movable compression ring 1512 and the fixed compression ring 1511 are provided with corresponding connecting holes, the bolt 1531 penetrates through the connecting holes and is fixed through the nut 1532, and the buffer 152 is sleeved on the bolt 1531 and in contact with the movable compression ring 1512. In some embodiments, the fastener 153 is provided with 2 groups, 3 groups or 4 groups, which are arranged along the circumference of the fixed compression ring 1511, that is, under the action of the buffer 152 on the movable compression ring 1512, the fastener 153 connects and fixes the fixed compression ring 1511 and the movable compression ring 1512, so that the connecting part 141 is connected and fixed between the fixed compression ring 1511 and the movable compression ring 1512; in the case that the movable compression ring 1512 acts on the buffer 152, the movable compression ring 1512 can move relative to the fixed compression ring 1511, so that the connecting part 141 has a certain activity space between the fixed compression ring 1511 and the movable compression ring 1512.

[0038] As shown in the drawings, Figure 2 In some embodiments, the fixed compression ring 1511 comprises a compression part and a rotating part connected with each other, the rotating part is connected with the output end of the driving assembly 120, and the compression part is matched with the movable compression ring 1512. The compression part can be a disc, and the rotating part can be a rotating shaft, wherein the rotating shaft can be connected with the output end of the driving assembly 120 to apply the driving force of the driving assembly 120 to the fixed compression ring 1511.

[0039] As shown in the drawings, Figure 1As shown, in some embodiments, the drive assembly 120 is a geared motor. The drive assembly 120 can achieve rapid horizontal rotation of the manifold 132 from 0° to 90°, for example, 0°, 20°, 28°, 30°, 45°, 52°, 60°, 65°, 75°, or 90°. This ensures good backflow of the strip while preventing damage to the manifold 132 from the strip lifting and impact.

[0040] like Figure 3 As shown, in some embodiments, the drive assembly 120 is disposed in the drive housing 121, which can effectively protect the gear reducer motor and prevent the influence of the environment such as laminar flow, high temperature water vapor and so on on the gear reducer motor.

[0041] like Figure 1 As shown, in some embodiments, a counterweight 160 is provided on the side of the connector 140 away from the manifold 132. The counterweight 160 has a connecting hole inside. The connector 140 passes through the connecting hole and is connected to the counterweight 160. The spray source 131 is located on the counterweight 160 and is connected to the connector 140. The counterweight 160 can be used to balance the weight of the manifold 132. At the same time, a second connector can be provided on the counterweight 160. Then, the spray source 131 is connected to the connector 140 through the second connector.

[0042] like Figure 1 As shown, in some embodiments, the column 110 is a telescopic column 110, which can serve as a support device for the entire structure and its height can be adjusted according to actual needs to meet the distance between the nozzle and the strip surface. This achieves a suitable distance between the manifold 132 and the strip under different media and pressures, thereby improving the water sealing effect, enhancing the strip profile, and reducing the transverse temperature difference on the strip surface.

[0043] like Figure 1 As shown, in some embodiments, the spray source 131 can be an air source, that is, compressed air can be sprayed back through the manifold 132, which can to a certain extent blow away the cooling water remaining on the surface of the strip, thereby reducing the amount of cooling water remaining on the surface of the strip and avoiding adverse effects of cooling water on the strip.

[0044] In a second aspect of this application, a hot-rolled strip mill system is provided, including the aforementioned laminar flow cooling reverse spray device 100 and a hot-rolled strip mill. The spray direction of the manifold 132 of the laminar flow cooling reverse spray device 100 is angled to the conveying direction of the hot-rolled strip mill. The laminar flow cooling reverse spray device 100 is mainly used in the laminar flow cooling zone of the hot-rolled strip mill. By spraying reverse compressed air through the manifold 132, it can, to a certain extent, blow away the residual cooling water on the surface of the strip, thereby reducing the amount of residual cooling water on the surface of the strip and preventing the cooling water from having an adverse effect on the strip.

[0045] In some embodiments, the included angle between the jetting direction of the header 132 of the laminar cooling reverse jet device 100 and the conveying direction of the hot strip rolling mill is an acute angle. In some embodiments, the included angle is 30°-45°, which can be 30°, 32°, 33°, 35°, 38°, 40°, 42° or 45°.

[0046] In some embodiments, a head deflection detection device is installed in front of the laminar cooling reverse jet device 100, i.e. in the conveying direction of the hot strip rolling mill, and the head deflection detection device is located closer to one side of the strip. In the conveying process of the strip, the strip first passes through the head deflection detection device and then passes through the laminar cooling reverse jet device 100. The head deflection detection device can first detect whether the head deflection of the strip exceeds the height of the header 132, and then control whether the header 132 rotates through the electric control system. When an external force hits the header 132, the header 132 is pushed by the external force with the help of the buffer assembly 150, thereby avoiding damage to the header 132 and the equipment. In normal production, the header 132 is transversely arranged on the steel passage to seal the water on the upper surface of the strip. When the detection device detects that the head deflection of the strip exceeds the height of the header 132, the reverse jet header 132 quickly rotates 90 degrees to avoid the impact of the strip. After the head of the strip passes, the header 132 can be automatically rotated back 90 degrees quickly to resume work through the driving assembly 120 or manually, and continue to seal the water on the rear section of the strip. When scrap steel appears, the header 132 can be manually rotated 90 degrees, thereby facilitating the quick processing of scrap steel, and the header 132 is rotated back to resume normal production after the scrap steel is processed.

[0047] Through the above embodiments, the application has the following beneficial effects or advantages:

[0048] The application drives the header 132 to rotate through the driving assembly 120 to achieve the function of quickly avoiding the impact of the strip, and is provided with the buffer assembly 150 to prevent damage to the header 132 in an uncontrollable situation, so that the height of the header 132 can be installed at a suitable distance from the running strip, ensuring the performance of the strip and improving the sealing effect, so that the reverse jet header 132 can be stably operated for a long time.

[0049] Although the preferred embodiments of the application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications falling within the scope of the application.

[0050] Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and their equivalent technologies, the application also intends to include these modifications and variations.

Claims

1. A laminar cooling reverse jet device applied to a hot strip rolling mill, characterized in that, The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device.

2. The laminar cooling reverse jet apparatus of claim 1, wherein The application relates to a laminar cooling reverse spraying device.

3. The laminar cooling reverse jet apparatus of claim 2, wherein The application relates to a laminar cooling reverse spraying device.

4. The laminar cooling reverse jet apparatus according to any one of claims 1 to 3, characterized in that The application relates to a laminar cooling reverse spraying device.

5. The laminar cooling reverse jet apparatus of claim 4, wherein The application relates to a laminar cooling reverse spraying device.

6. The laminar cooling reverse jet apparatus according to any one of claims 1 to 3, characterized in that The application relates to a laminar cooling reverse spraying device.

7. The laminar cooling reverse jet apparatus according to any one of claims 1 to 3, characterized in that The application relates to a laminar cooling reverse spraying device.

8. The laminar cooling reverse jet apparatus according to any one of claims 1 to 3, characterized in that The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device.

9. A hot strip rolling mill system characterized by, The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device.

10. The hot strip mill system of claim 9, wherein, The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. The application relates to a laminar cooling reverse spraying device. 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