CN219299652U - Special metal hot rolling HGC system and rolling mill - Google Patents
Special metal hot rolling HGC system and rolling mill Download PDFInfo
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- CN219299652U CN219299652U CN202320851494.9U CN202320851494U CN219299652U CN 219299652 U CN219299652 U CN 219299652U CN 202320851494 U CN202320851494 U CN 202320851494U CN 219299652 U CN219299652 U CN 219299652U
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Abstract
The utility model provides a special metal hot rolling HGC system and a rolling mill, and relates to the technical field of metal rolling. The special metal hot rolling HGC system comprises: the hydraulic oil way, the hydraulic oil cylinder, the large-flow servo valve and the small-flow servo valve; the hydraulic oil way comprises a main oil supply pipeline, a main oil return pipeline, a control oil pipeline and a pressure regulating oil pipeline; the hydraulic cylinder is provided with a rod cavity and a rodless cavity, the rodless cavity is communicated with a pressure regulating oil pipeline, the rod cavity is communicated with external equipment, and the external equipment is used for providing back pressure; the valve body ends of the large-flow servo valve and the small-flow servo valve are respectively communicated with the pressure regulating oil pipeline, and the valve body ends of the large-flow servo valve and the small-flow servo valve are communicated with the main oil supply pipeline and the main oil return pipeline; the driving ends of the large-flow servo valve and the small-flow servo valve are communicated with a control oil pipeline. The beneficial effects of this technical scheme are: and the roll gap of the HGC system is rapidly and accurately controlled by controlling the pressure of the pressure regulating oil pipeline through the large-flow servo valve and the small-flow servo valve.
Description
Technical Field
The utility model relates to the technical field of metal rolling, in particular to a special metal hot rolling HGC system and a rolling mill.
Background
A plate mill is a metal press that passes a rolling stock through rolls having a roll gap to produce a plate strip of a desired thickness. During rolling, the dimensional accuracy of the plate thickness is the most important quality index that must be ensured, and the rolling mill HGC (Hydraulic gap control-hydraulic gap control) is a hydraulic control unit in the rolling mill system for controlling the size of the rolling gap.
The rolling of the special metal needs to be performed through several links of rough rolling, medium rolling and finish rolling, but because the yield of the special metal is low, the rolling temperature interval is small, tempering and rolling are needed, the steel types are complex and various, the special features of mass production and the like are not easy to form, and the special metal is not suitable for being designed into a continuous rolling mode of a plurality of rolling mills. Therefore, the rough rolling, the middle rolling and the finish rolling of special metals are integrated on a rolling mill. However, the control requirements of different rolling working conditions on the rolling mill HGC hydraulic control system are different, so that multi-working-condition rolling is required to be realized on one rolling mill, and the existing HGC control system is difficult to meet the multi-working-condition rolling requirements.
Disclosure of Invention
The utility model solves the problem of how to adapt to the requirements of different working conditions on the HGC hydraulic control system.
In order to solve the above problems, the present utility model provides a special metal hot rolling HGC system, comprising: the hydraulic oil way, the hydraulic oil cylinder, the large-flow servo valve and the small-flow servo valve; the hydraulic oil way comprises a main oil supply pipeline, a main oil return pipeline, a control oil pipeline and a pressure regulating oil pipeline; the hydraulic cylinder is provided with a rod cavity and a rodless cavity, the rodless cavity is communicated with the pressure regulating oil pipeline, the rod cavity is communicated with external equipment, and the external equipment is used for providing back pressure; the valve body ends of the large-flow servo valve and the small-flow servo valve are respectively communicated with the pressure regulating oil pipeline, and the valve body ends of the large-flow servo valve and the small-flow servo valve are communicated with the main oil supply pipeline and the main oil return pipeline; and the driving ends of the large-flow servo valve and the small-flow servo valve are communicated with the control oil pipeline.
The beneficial effects of the utility model are as follows: according to the utility model, a large-flow servo valve and a small-flow servo valve are arranged, the valve body ends of the large-flow servo valve and the small-flow servo valve are respectively communicated with the pressure-regulating oil pipeline, and the valve body ends of the large-flow servo valve and the small-flow servo valve are communicated with the main oil supply pipeline and the main oil return pipeline; and the driving ends of the large-flow servo valve and the small-flow servo valve are communicated with the control oil pipeline. When in blooming or intermediate rolling, the reduction of each pass is large, the roller gap is required to be quickly adjusted by biting and throwing steel, the large-flow servo valve is adopted for control, the oil pressure of the pressure-regulating oil pipeline is controlled by adjusting the opening degree of the large-flow servo valve, so that the pressure of the rodless cavity of the hydraulic oil cylinder is adjusted, the piston stroke of the hydraulic oil cylinder is adjusted, and the roller gap is further controlled. The large-flow servo valve has the advantages that the oil pressure range of the adjustable pressure-regulating oil pipeline is larger due to larger flow, so that the roll gap adjusting time can be shortened as much as possible, and the head and tail waste rate of strip steel is reduced. During finish rolling, the roll gap adjustment amount is small, the product precision is mainly controlled, the small-flow servo valve is used for controlling the oil pressure of the pressure regulating oil pipeline, and because the small-flow servo valve is small in flow, the accurate control of the oil pressure of the pressure regulating oil pipeline can be realized, so that the control precision is improved, and the same-plate-difference precision requirement of a product can be met.
Optionally, the special metal hot rolling HGC system further includes: the pressure sensor is arranged on the pressure regulating oil pipeline and used for acquiring the pressure of the pressure regulating oil pipeline; the high-flow servo valve and the low-flow servo valve are used for acting according to the pressure signal.
Optionally, the special metal hot rolling HGC system further includes: the displacement sensor is arranged at the rodless cavity of the hydraulic oil cylinder and is used for acquiring the piston displacement of the hydraulic oil cylinder; the large-flow servo valve and the small-flow servo valve are used for acting according to signals of the piston displacement.
Optionally, the pressure regulating oil pipeline is also communicated with an electromagnetic overflow valve, one end of the electromagnetic overflow valve is connected with the pressure regulating oil pipeline, and the other end of the electromagnetic overflow valve is connected with the main oil return pipeline.
Optionally, the inlets and outlets of the large-flow servo valve and the small-flow servo valve are respectively provided with a hydraulic control one-way valve.
Optionally, an electromagnetic reversing valve is arranged on a control pipeline of the hydraulic control one-way valve, and the electromagnetic reversing valve is used for controlling the hydraulic control one-way valve to be opened and closed.
Optionally, an accumulator is further arranged between the main oil supply pipeline and the main oil return pipeline, and high-pressure gas is filled in the accumulator for maintaining the system pressure.
Optionally, a first stop valve is arranged between the accumulator and the main oil supply pipeline, and a second stop valve is arranged between the accumulator and the main oil return pipeline.
Optionally, a one-way valve is arranged between the large-flow servo valve and the main oil return pipeline; and a one-way valve is arranged between the small-flow servo valve and the main oil return pipeline.
The utility model also provides a rolling mill comprising the special metal hot rolling HGC system.
The rolling mill has the same advantages as the special metal hot rolling HGC system in the prior art, and is not repeated here.
Drawings
FIG. 1 is a schematic diagram of a special metal hot rolling HGC system according to an embodiment of the present utility model.
Reference numerals illustrate:
1-a pressure regulating oil pipeline; 2-a main oil return pipeline; 3-a main oil supply line; 4-a control oil pipeline; 5-a rod cavity; 6-a rodless cavity; 7-a large flow servo valve; 8-a small flow servo valve; 9-a pressure sensor; 10-a displacement sensor; 11-a hydraulically-controlled check valve; 12-an accumulator; 13-an electromagnetic directional valve; 14-a first shut-off valve; 15-a second shut-off valve; 16-an electromagnetic spill valve; 17-one-way valve.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It should be noted that, in the description of the present utility model, the directions or positional relationships indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner" and "outer", etc. are used for convenience of describing the present utility model only based on the directions or positional relationships shown in the drawings, and are not meant to indicate or imply that the apparatus must have a specific orientation, be configured and manipulated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present utility model.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
Moreover, while the utility model has been described with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present utility model. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present utility model as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways not otherwise described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
The hydraulic cylinder of the HGC system in the existing rolling mill is often connected with the outlet of the servo valve through a high-pressure hose, and the path is longer, so that the rigidity of the hydraulic system is lower, the response of the servo valve is also lagged, and the hydraulic system is only suitable for the rough rolling process. While the finish rolling HGC system has a narrow adjustment range for reduction and a slower response speed. For special metals, due to the physical properties of the special metals, the temperature range suitable for the special metals in the rolling process is narrow, so that the special metals need to be tempered and rolled for multiple times, and the special metals are difficult to design into a process form of continuous rolling of a plurality of rolling mills from rough rolling to finish rolling. Therefore, it is necessary to integrate rough rolling, intermediate rolling, and finish rolling on one rolling mill to realize multi-working condition rolling.
To this end, referring to fig. 1, an embodiment of the present utility model provides a special metal hot rolling HGC system, including: a hydraulic oil way, a hydraulic oil cylinder, a large-flow servo valve 7 and a small-flow servo valve 8; the hydraulic oil way comprises a main oil supply pipeline 3, a main oil return pipeline 2, a control oil pipeline 4 and a pressure regulating oil pipeline 1; the hydraulic cylinder is provided with a rod cavity 5 and a rodless cavity 6, the rodless cavity 6 is communicated with the pressure regulating oil pipeline 1, the rod cavity 5 is communicated with external equipment, and the external equipment is used for providing back pressure; the valve body ends of the large-flow servo valve 7 and the small-flow servo valve 8 are respectively communicated with the pressure regulating oil pipeline 1, and the valve body ends of the large-flow servo valve 7 and the small-flow servo valve 8 are communicated with the main oil supply pipeline 3 and the main oil return pipeline 2; the driving ends of the high-flow servo valve 7 and the low-flow servo valve 8 are communicated with the control oil pipeline 4.
Specifically, in the present embodiment, the pressure regulating oil line 1 includes a line between the outlet of the large flow rate servo valve 7 and the outlet of the small flow rate servo valve 8 to the rodless chamber 6 of the hydraulic cylinder. The valve body end of the large-flow servo valve 7 is respectively connected with the pressure regulating oil pipeline 1, the main oil supply pipeline 3 and the main oil return pipeline 2, and the valve body end of the small-flow servo valve 8 is respectively connected with the pressure regulating oil pipeline 1, the main oil supply pipeline 3 and the main oil return pipeline 2. By adjusting the opening degree of the large-flow servo valve 7 or the small-flow servo valve 8, the oil in the main oil supply pipeline 3 enters the pressure-regulating oil pipeline 1 through the large-flow servo valve 7 or the small-flow servo valve 8 to form pressure-regulating oil with unequal pressure. When pressure relief is required, the pressure-regulating oil line 1 can flow to the main oil return line 2 through the large-flow servo valve 7 or the small-flow servo valve 8. The driving ends of the large-flow servo valve 7 and the small-flow servo valve 8 are communicated with the control oil pipeline 4, and are used for controlling the opening degree of the large-flow servo valve 7 or the small-flow servo valve 8 by utilizing the control oil pipeline 4 according to actual needs. The rod chamber 5 communicates with an external device for providing back pressure. In some embodiments, the backpressure may be set to a constant value.
In some embodiments, during initial rolling, each pass is to electrically press down the pre-swing roll gap, and the small flow servo valve 8 fine-tunes the roll gap on line. The first few passes are also to electrically press down the pre-swing roll gap when rolling the second fire steel plate, and the small flow servo valve 8 fine-tunes the roll gap on line; the final pass is pre-swung with a high flow servo valve 7 and the roll gap is fine-tuned on line. The prior passes are pre-swung by a large-flow servo valve 7 and the roll gap is finely adjusted on line when the three-fire steel plate is rolled, and the final passes are pre-swung by a small-flow servo valve 8 and the roll gap is finely adjusted on line.
In the embodiment, by arranging a large-flow servo valve 7 and a small-flow servo valve 8, the valve body ends of the large-flow servo valve 7 and the small-flow servo valve 8 are respectively communicated with the pressure-regulating oil pipeline 1, and the valve body ends of the large-flow servo valve 7 and the small-flow servo valve 8 are communicated with the main oil supply pipeline 3 and the main oil return pipeline 2; the driving ends of the high-flow servo valve 7 and the low-flow servo valve 8 are communicated with the control oil pipeline 4. When in blooming or intermediate rolling, each pass has large reduction, the roller gap is required to be quickly adjusted by biting and throwing steel, the large-flow servo valve 7 is adopted for controlling, the oil pressure of the pressure-regulating oil pipeline 1 is controlled by adjusting the opening degree of the large-flow servo valve 7, so that the pressure of the rodless cavity 6 of the hydraulic oil cylinder is adjusted, the piston stroke of the hydraulic oil cylinder is adjusted, and the roller gap is further controlled. The large-flow servo valve 7 has the advantages that the oil pressure range of the adjustable pressure-regulating oil pipeline 1 is larger due to larger flow, so that the roll gap adjusting time can be shortened as much as possible, and the head and tail waste rate of strip steel is reduced. During finish rolling, the roll gap adjustment amount is small, the product precision is mainly controlled, the oil pressure of the pressure regulating oil pipeline 1 is controlled by the small-flow servo valve 8, and because the small-flow servo valve 8 has smaller flow, the accurate control of the oil pressure of the pressure regulating oil pipeline 1 can be realized, so that the control precision is improved, and the requirement of the same plate difference precision of the product can be met.
Optionally, as shown in connection with fig. 1, the special metal hot rolling HGC system further includes: the pressure sensor 9 is arranged on the pressure regulating oil pipeline 1 and is used for acquiring the pressure of the pressure regulating oil pipeline 1; the large flow servo valve 7 and the small flow servo valve 8 are operated according to the signal of the pressure.
Specifically, in the present embodiment, the pressure sensor 9 is disposed on the pressure-adjusting oil line 1, for acquiring the pressure of the pressure-adjusting oil line 1. In some embodiments, the pressure signal is transmitted to a controller, the controller compares the pressure of the pressure-regulating oil pipeline 1 with a preset pressure, and according to the comparison result, issues an opening adjustment instruction to the large-flow servo valve 7 or the small-flow servo valve 8, and adjusts the opening of the large-flow servo valve 7 or the small-flow servo valve 8 so that the pressure of the pressure-regulating oil pipeline 1 reaches the preset pressure.
In this embodiment, by setting the pressure sensor 9, the pressure on the pressure regulating oil pipeline 1 can be effectively regulated according to actual needs, so as to regulate the pressure of the rodless cavity 6 in the hydraulic cylinder, thereby realizing accurate control of the piston stroke of the hydraulic cylinder.
Optionally, as shown in connection with fig. 1, the special metal hot rolling HGC system further includes: a displacement sensor 10, wherein the displacement sensor 10 is arranged at the rodless cavity 6 of the hydraulic oil cylinder and is used for acquiring the piston displacement of the hydraulic oil cylinder; the large flow servo valve 7 and the small flow servo valve 8 are used for acting according to the signals of the piston displacement.
Specifically, in the present embodiment, the displacement sensor 10 is provided at the rodless chamber 6 of the hydraulic cylinder for acquiring the piston displacement of the hydraulic cylinder. In some embodiments, the signal of the piston displacement is transmitted to a controller, the controller compares the piston displacement with a preset displacement, and according to the comparison result, issues an instruction for adjusting the opening degree to the large-flow servo valve 7 or the small-flow servo valve 8, and adjusts the opening degree of the large-flow servo valve 7 or the small-flow servo valve 8 so that the piston displacement reaches the preset displacement.
In this embodiment, by providing the displacement sensor 10, accurate control of the piston stroke of the hydraulic cylinder can be achieved according to actual needs.
Optionally, as shown in fig. 1, the pressure-regulating oil pipeline 1 is further communicated with an electromagnetic relief valve 16, one end of the electromagnetic relief valve 16 is connected to the pressure-regulating oil pipeline 1, and the other end is connected to the main oil return pipeline 2.
Specifically, in the present embodiment, the pressure-regulating oil line 1 and the electromagnetic relief valve 16 are also connected, and one end of the electromagnetic relief valve 16 is connected to the pressure-regulating oil line 1, and the other end is connected to the main oil return line 2. When the pressure of the pressure-regulating oil pipeline 1 is too high or other abnormal conditions occur in the system, the electromagnetic relief valve 16 can be opened manually or automatically quickly to provide a pressure relief channel for the pressure-regulating oil pipeline 1, so that damage caused by the too high system pressure is prevented.
Optionally, as shown in fig. 1, the inlets and outlets of the high-flow servo valve 7 and the low-flow servo valve 8 are respectively provided with a hydraulic control one-way valve 11.
Specifically, in this embodiment, the inlets and outlets of the large-flow servo valve 7 and the small-flow servo valve 8 are respectively provided with a pilot operated check valve 11, the control loop of the pilot operated check valve 11 is connected to the control oil pipeline 4, and the opening and closing of the pilot operated check valve 11 is controlled by the control oil pipeline 4.
In this embodiment, the inlet and outlet of the large-flow servo valve 7 and the small-flow servo valve 8 are respectively provided with a pilot operated check valve 11, so that the inlet and outlet states of the large-flow servo valve 7 or the small-flow servo valve 8 can be regulated and controlled. Meanwhile, when the large-flow servo valve 7 or the small-flow servo valve 8 is out of order, the hydraulic control one-way valve 11 is closed to check and replace the large-flow servo valve 7 or the small-flow servo valve 8, so that the hydraulic oil consumption can be reduced. The pilot operated check valve 11 is controlled individually. It is ensured that the large-flow servo valve 7 and the small-flow servo valve 8 do not affect each other when operating.
Optionally, as shown in fig. 1, an electromagnetic directional valve 13 is disposed on a control pipeline of the hydraulic control one-way valve 11, and the electromagnetic directional valve 13 is used for controlling opening and closing of the hydraulic control one-way valve 11.
In this embodiment, the electromagnetic directional valve 13 is connected to the main oil supply pipeline 3, the main oil return pipeline 2, and the control pipeline of the pilot operated check valve 11, and is used for controlling the opening and closing of the pilot operated check valve 11.
Optionally, as shown in connection with fig. 1, an accumulator 12 is further arranged between the main oil supply line 3 and the main oil return line 2, and the accumulator 12 is filled with high-pressure gas for maintaining the system pressure.
In this embodiment, an accumulator 12 is further disposed between the main oil supply pipeline 3 and the main oil return pipeline 2, and the accumulator 12 is filled with high-pressure gas for maintaining the system pressure, and the response speed of the system can be further improved and the system impact can be reduced by the accumulator 12.
Optionally, as shown in connection with fig. 1, a first shut-off valve 14 is arranged between the accumulator 12 and the main oil supply line 3, and a second shut-off valve 15 is arranged between the accumulator 12 and the main oil return line 2.
In the present embodiment, in the on-line state of the accumulator 12, the first shut-off valve 14 is in a normally open state, and the second shut-off valve 15 is a bypass valve of the first shut-off valve 14, and is in a normally closed state. When the accumulator 12 is operated to release pressure, the second shut-off valve 15 may be opened to release pressure. By providing the first stop valve 14 and the second stop valve 15, the on-line state of the accumulator 12 is ensured.
Optionally, as shown in fig. 1, a check valve 17 is disposed between the high-flow servo valve 7 and the main oil return pipeline 2; a one-way valve 17 is arranged between the small-flow servo valve 8 and the main oil return pipeline 2.
In the embodiment, a one-way valve 17 is arranged between the large-flow servo valve 7 and the main oil return pipeline 2; a one-way valve 17 is arranged between the small-flow servo valve 8 and the main oil return pipeline 2. The oil in the main return line 2 can be prevented from flowing back into the large-flow servo valve 7 or the small-flow servo valve 8 by the check valve 17.
The embodiment of the utility model also provides a rolling mill comprising the special metal hot rolling HGC system.
The rolling mill in the embodiment of the utility model has the same advantages as the special metal hot rolling HGC system in the prior art, and is not described in detail herein.
Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.
Claims (10)
1. A special metal hot rolled HGC system, comprising: the hydraulic oil way, the hydraulic oil cylinder, the large-flow servo valve (7) and the small-flow servo valve (8);
the hydraulic oil way comprises a main oil supply pipeline (3), a main oil return pipeline (2), a control oil pipeline (4) and a pressure regulating oil pipeline (1);
the hydraulic oil cylinder is provided with a rod cavity (5) and a rodless cavity (6), the rodless cavity (6) is communicated with the pressure regulating oil pipeline (1), the rod cavity (5) is communicated with external equipment, and the external equipment is used for providing back pressure;
the valve body ends of the large-flow servo valve (7) and the small-flow servo valve (8) are respectively communicated with the pressure-regulating oil pipeline (1), and the valve body ends of the large-flow servo valve (7) and the small-flow servo valve (8) are communicated with the main oil supply pipeline (3) and the main oil return pipeline (2); the driving ends of the large-flow servo valve (7) and the small-flow servo valve (8) are communicated with the control oil pipeline (4).
2. The special metal hot rolled HGC system according to claim 1, further comprising: the pressure sensor (9) is arranged on the pressure regulating oil pipeline (1) and is used for acquiring the pressure of the pressure regulating oil pipeline (1); the large-flow servo valve (7) and the small-flow servo valve (8) are used for acting according to the signals of the pressure.
3. The special metal hot rolled HGC system according to claim 1, further comprising: the displacement sensor (10) is arranged at the rodless cavity (6) of the hydraulic oil cylinder and used for acquiring the piston displacement of the hydraulic oil cylinder; the large-flow servo valve (7) and the small-flow servo valve (8) are used for acting according to the signals of the piston displacement.
4. The special metal hot rolling HGC system according to claim 1, wherein the pressure regulating oil pipeline (1) is further communicated with an electromagnetic overflow valve (16), one end of the electromagnetic overflow valve (16) is connected with the pressure regulating oil pipeline (1), and the other end is connected with the main oil return pipeline (2).
5. The special metal hot rolling HGC system according to claim 1, wherein the inlets and outlets of the large flow servo valve (7) and the small flow servo valve (8) are respectively provided with a hydraulic control one-way valve (11).
6. The special metal hot rolling HGC system according to claim 5, wherein the control pipeline of the hydraulic control check valve (11) is provided with an electromagnetic directional valve (13), and the electromagnetic directional valve (13) is used for controlling the opening and closing of the hydraulic control check valve (11).
7. The special metal hot rolling HGC system according to claim 1, characterized in that an accumulator (12) is also provided between the main oil supply line (3) and the main oil return line (2), the accumulator (12) being charged with high pressure gas for maintaining the system pressure.
8. The special metal hot rolling HGC system according to claim 7, characterized in that a first shut-off valve (14) is arranged between the accumulator (12) and the main oil supply line (3), and a second shut-off valve (15) is arranged between the accumulator (12) and the main oil return line (2).
9. The special metal hot rolling HGC system according to claim 1, wherein a one-way valve (17) is arranged between the high-flow servo valve (7) and the main oil return pipeline (2); a one-way valve (17) is arranged between the small-flow servo valve (8) and the main oil return pipeline (2).
10. Rolling mill, characterized by comprising a special metal hot rolling HGC system according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320851494.9U CN219299652U (en) | 2023-04-17 | 2023-04-17 | Special metal hot rolling HGC system and rolling mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320851494.9U CN219299652U (en) | 2023-04-17 | 2023-04-17 | Special metal hot rolling HGC system and rolling mill |
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