Cooling device between passes of rolling mill
By designing the interpass cooling device in the rolling mill and using the high-density nozzle assembly to spray the water curtain to cool the steel plate, the problem of temperature unevenness during the rolling process is solved, and the tissue performance and production efficiency of thick-specification steel plates are improved.
Patent Information
- Application Number
- CN202421478310.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-26
AI Technical Summary
In the prior art, the rolling force of the rolling mill is limited, and the pass pressure cannot be too large, which leads to the extended rolling time of the steel plate, low production efficiency, and insufficient compression ratio of the thick-specification steel plate, resulting in deformation of the rolling process that cannot penetrate the core of the tissue, resulting in poor product performance.
A rolling mill interpass cooling device is designed, through the combination of cooling the main water supply pipeline and high-density nozzle assembly, the jet water curtain cools the steel plate, controls the steel plate temperature, and improves the temperature uneven problem during the rolling process.
It effectively solves the problem of uneven temperature during steel plate rolling, improves the structural performance of thick-specification steel plates, reduces internal defects of products, and improves production efficiency and surface quality of steel plates.
Smart Images
Figure CN222739945U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a cooling device, in particular to a cooling device between passes of a rolling mill. Background Art
[0002] With the continuous improvement of the market competitiveness of medium and thick plates, more medium and thick plate mills have continuously improved their market competitiveness by adjusting their product structure and developing new varieties. However, the limitations of equipment capacity and site have made the development of new varieties encounter more challenges. First, the rolling force of the rolling mill is limited, and the reduction per pass cannot be too large. In order to ensure the performance, the secondary rolling temperature must be controlled, the steel plate rolling time is extended, and the production efficiency is reduced. At the same time, due to the insufficient compression ratio of the rolled thick-gauge steel plate, the deformation during the rolling process cannot penetrate into the core of the organization, so that the defects in the core cannot be welded, resulting in some difficult-to-eliminate internal defects in the thick plate, resulting in product performance that cannot meet customer needs. Utility Model Content
[0003] The purpose of the utility model is to provide a cooling device between rolling mill passes in view of the shortcomings and defects in the prior art. The technology of controlling the temperature of the steel plate between rolling mill passes is adopted to effectively overcome the problems of low rolling efficiency, uncontrollable temperature between rolling passes and insufficient compression ratio of thick plates.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cooling device between passes of a rolling mill, which includes a cooling water supply main line 1, the cooling water supply main line 1 is connected to one end of an external water pipe 3, the other end of the external water pipe 3 is connected to a valve air supply line 4, and an exhaust pipe 2 is installed on the valve air supply line 4, and the water outlet end of the external water pipe 3 is respectively connected to a lower high-density nozzle assembly 7 and an upper high-density nozzle assembly 8.
[0005] Furthermore, at least two of the lower high-density nozzle assemblies 7 and the upper high-density nozzle assemblies 8 are provided, and one lower high-density nozzle assembly 7 and one upper high-density nozzle assembly 8 form a group of valve air supply pipelines 4 connected thereto.
[0006] Furthermore, a lower manifold mounting seat 5 for supporting and fixing the lower high-density nozzle assembly 7 is installed at the bottom of the lower high-density nozzle assembly 7 .
[0007] Furthermore, an upper header welding hanger 6 for hanging and fixing the upper high-density nozzle assembly 8 is installed at the upper end of the upper high-density nozzle assembly 8 .
[0008] Furthermore, the lower high-density nozzle assembly 7 includes a lower manifold body 71 , on which a plurality of lower high-density nozzles 74 are disposed, and fixing assemblies 73 are installed at both ends of the lower manifold body 71 , and a lower threaded ball valve 72 is disposed below the lower manifold body 71 .
[0009] Furthermore, the upper high-density nozzle assembly 8 includes an upper manifold body 81, both ends of the upper manifold body 81 are equipped with side baffles 84, and the upper and lower ends of the upper high-density nozzle assembly 8 are respectively equipped with an upper internal thread elbow 82 and a lower internal thread elbow 89, the upper internal thread elbow 82 and the lower internal thread elbow 89 are both connected to a metal hose 83, a metal pipe clamp 88 is installed on the metal hose 83, a channel steel 87 is provided at the lower end of the metal pipe clamp 88, and the other end of the metal hose 83 is connected to a double thread head 85, and an upper threaded ball valve 86 is installed on the double thread head 85.
[0010] After adopting the above technical solution, the beneficial effects of the utility model are: the device has at least the following advantages:
[0011] 1) Solve the buckle problem in the steel plate rolling process. There is inevitably a temperature difference between the upper and lower surfaces during the heating process of the steel billet. After rough rolling and intermediate cooling, the upper surface temperature of the steel plate is often higher than the lower surface temperature, resulting in the buckle problem of the steel plate due to the temperature difference between the upper and lower surfaces during the finishing rolling process. The buckled steel plate hits the roller during the rolling process, reducing the service life of the roller and transmission equipment. The cooling water curtain between passes can effectively change the upper and lower surface trends of the steel plate during the rolling pass, making the upper surface temperature lower than the lower surface, and the metal fluidity of the lower surface is strong, thereby solving the buckle problem of the steel plate.
[0012] 2) Improve the core structure performance of thick-gauge steel plates. During the rolling process of thick-gauge steel plates with insufficient compression ratio, the surface deformation cannot penetrate into the core, and the shrinkage holes and loose defects in the core cannot be effectively welded. Through the cooling water curtain between passes, the surface cooling intensity of the steel plate is improved, the surface hardness is large, and the rolling deformation can penetrate into the core structure, thereby improving the overall performance of the thick-gauge steel plate.
[0013] 3) Improve the production rhythm. For steel plates that need to be controlled for rolling, the cooling water curtain between passes can effectively increase the surface cooling intensity and improve the organizational performance. Therefore, the finishing rolling start temperature of the controlled rolling plate can be appropriately increased, the waiting time of the intermediate billet can be reduced, and the production rhythm can be improved.
[0014] 4) Improve the surface quality of the steel plate. The cooling water curtain between passes in the rolling process forms a cooling boiling film on the surface of the steel plate, which can reduce the contact area between the steel plate surface and the air and reduce the formation of iron oxide scale on the steel plate surface, thereby improving the surface quality of the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] Figure 2 yes Figure 1 The corresponding front view structure diagram.
[0018] Figure 3 yes Figure 1 The corresponding left view structure diagram.
[0019] Figure 4 yes Figure 1 The corresponding top view of the structure.
[0020] Figure 5 It is a structural schematic diagram of the middle and lower high-density nozzle assembly of the utility model.
[0021] Figure 6 yes Figure 5 The corresponding right view structure diagram.
[0022] Figure 7 yes Figure 5 The corresponding top view of the structure.
[0023] Figure 8 yes Figure 5 The corresponding front view structure diagram.
[0024] Fig. 9 It is a structural schematic diagram of the middle and upper high-density nozzle assembly of the utility model.
[0025] Fig.10 yes Fig. 9 The corresponding right view structure diagram.
[0026] Fig.11 yes Fig. 9 The corresponding top view of the structure.
[0027] Fig.12 yes Fig. 9 The corresponding front view structure diagram.
[0028] Explanation of the reference numerals: cooling water supply main line 1, exhaust pipe 2, external water distribution pipe 3, valve air supply line 4, lower manifold mounting base 5, upper manifold welding hanger 6, lower high-density nozzle assembly 7, upper high-density nozzle assembly 8, lower manifold body 71, lower threaded ball valve 72, fixing assembly 73, lower high-density nozzle 74, upper manifold body 81, upper internal thread elbow 82, metal hose 83, side baffle 84, double thread head 85, upper threaded ball valve 86, channel steel 87, metal pipe clamp 88, lower internal thread elbow 89. DETAILED DESCRIPTION
[0029] See also Figure 1-Figure 12As shown, the technical solution adopted in this specific embodiment is: it includes a cooling water supply main line 1, the cooling water supply main line 1 is connected to one end of an external water pipe 3, the other end of the external water pipe 3 is connected to a valve air supply line 4, and an exhaust pipe 2 is installed on the valve air supply line 4, and the water outlet end of the external water pipe 3 is respectively connected to a lower high-density nozzle assembly 7 and an upper high-density nozzle assembly 8.
[0030] More specifically, at least two lower high-density nozzle assemblies 7 and upper high-density nozzle assemblies 8 are provided, and one lower high-density nozzle assembly 7 and one upper high-density nozzle assembly 8 form a group connected to their valve air supply pipeline 4. Multiple groups of lower high-density nozzle assemblies 7 and upper high-density nozzle assemblies 8 can process multiple groups of materials at the same time.
[0031] To be more specific, a lower manifold mounting seat 5 for supporting and fixing the lower high-density nozzle assembly 7 is installed at the bottom of the lower high-density nozzle assembly 7 .
[0032] To be more specific, an upper header welding hanger 6 for hanging and fixing the upper high-density nozzle assembly 8 is installed at the upper end of the upper high-density nozzle assembly 8 .
[0033] More specifically, the lower high-density nozzle assembly 7 includes a lower manifold body 71, on which a plurality of lower high-density nozzles 74 are arranged, and fixing assemblies 73 are installed at both ends of the lower manifold body 71, and a lower threaded ball valve 72 is provided below the lower manifold body 71. When in use, the lower manifold body 71 is installed on the lower manifold mounting seat 5, fixed by the fixing assemblies 73 on both sides, and connected to the external water distribution pipe 3 through the lower threaded ball valve 72.
[0034] To be more specific, the upper high-density nozzle assembly 8 includes an upper manifold body 81, both ends of the upper manifold body 81 are equipped with side baffles 84, and the upper and lower ends of the upper high-density nozzle assembly 8 are respectively equipped with an upper internal thread elbow 82 and a lower internal thread elbow 89, the upper internal thread elbow 82 and the lower internal thread elbow 89 are both connected to a metal hose 83, a metal pipe clamp 88 is installed on the metal hose 83, the lower end of the metal pipe clamp 88 is provided with a channel steel 87, and the other end of the metal hose 83 is connected to a double thread head 85, and the double thread head 85 is equipped with an upper threaded ball valve 86.
[0035] The working principle of the utility model is as follows: when in use, the cooling water supply main line 1 supplies water to the external water pipe 3, and the external water pipe 3 distributes its water source to the lower high-density nozzle assembly 7 and the upper high-density nozzle assembly 8, and the water source is sprayed out through the lower high-density nozzle assembly 7 and the upper high-density nozzle assembly 8, and the water source is used to cool the steel plate.
[0036] The above is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.
Claims
1. A cooling device between passes of a rolling mill, characterized in that: It comprises a cooling water supply main line (1), the cooling water supply main line (1) being connected to one end of an external water distribution pipe (3), the other end of the external water distribution pipe (3) being connected to a valve air supply pipe (4), and an exhaust pipe (2) being installed on the valve air supply pipe (4), and the water outlet end of the external water distribution pipe (3) being respectively connected to a lower high-density nozzle assembly (7) and an upper high-density nozzle assembly (8).
2. A cooling device between passes of a rolling mill according to claim 1, characterized in that: At least two of the lower high-density nozzle assemblies (7) and the upper high-density nozzle assemblies (8) are provided, and one lower high-density nozzle assembly (7) and one upper high-density nozzle assembly (8) form a set of valve air supply pipelines (4) connected thereto.
3. A cooling device between passes of a rolling mill according to claim 1, characterized in that: A lower header mounting seat (5) for supporting and fixing the lower high-density nozzle assembly (7) is installed at the bottom of the lower high-density nozzle assembly (7).
4. A cooling device between passes of a rolling mill according to claim 1, characterized in that: An upper header welding hanger (6) for hanging and fixing the upper high-density nozzle assembly (8) is installed at the upper end of the upper high-density nozzle assembly (8).
5. The inter-pass cooling device of a rolling mill according to claim 1, characterized in that: The lower high-density nozzle assembly (7) comprises a lower manifold body (71), on which a plurality of lower high-density nozzles (74) are arranged, and fixing assemblies (73) are installed at both ends of the lower manifold body (71), and a lower threaded ball valve (72) is arranged below the lower manifold body (71).
6. The inter-pass cooling device of a rolling mill according to claim 1, characterized in that: The upper high-density nozzle assembly (8) comprises an upper manifold body (81), both ends of the upper manifold body (81) are equipped with side baffles (84), and the upper and lower ends of the upper high-density nozzle assembly (8) are respectively equipped with an upper internal thread elbow (82) and a lower internal thread elbow (89), the upper internal thread elbow (82) and the lower internal thread elbow (89) are both connected to a metal hose (83), a metal pipe clamp (88) is installed on the metal hose (83), a channel steel (87) is provided at the lower end of the metal pipe clamp (88), and the other end of the metal hose (83) is connected to a double thread head (85), and an upper threaded ball valve (86) is installed on the double thread head (85).