CN220622302U - Roughing mill guide hydraulic control device - Google Patents
Roughing mill guide hydraulic control device Download PDFInfo
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- CN220622302U CN220622302U CN202321981880.6U CN202321981880U CN220622302U CN 220622302 U CN220622302 U CN 220622302U CN 202321981880 U CN202321981880 U CN 202321981880U CN 220622302 U CN220622302 U CN 220622302U
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- valve
- reducing valve
- hydraulic cylinder
- pilot
- hydraulic
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- 238000001514 detection method Methods 0.000 claims description 32
- 238000003723 Smelting Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 33
- 230000007547 defect Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a roughing mill guide hydraulic control device, which relates to the technical field of steel smelting equipment.
Description
Technical Field
The utility model relates to the technical field of steel smelting equipment, in particular to a guide hydraulic control device of a roughing mill.
Background
The hydraulic control devices of the inlet guide and the outlet guide of the conventional roughing mill are divided into two types: an electromagnetic reversing valve has a positioning function and has the advantages that when the electromagnetic reversing valve is independently powered off, the valve can still keep the guide to work normally because of the positioning function; the hydraulic control device has the defects that when the whole hydraulic control device is suddenly powered off, the hydraulic control device does not have a self-locking function, so that the guide and guard fall down instantaneously, and the rolled slab is easy to collide with the guide and guard. The other electromagnetic reversing valve adopts spring reset, and has the advantages that when the whole hydraulic control device is suddenly powered off, the hydraulic control device has a self-locking function, the guide can still keep the working position, and the collision accident of the rolled plate blank and the guide is avoided; the electromagnetic valve has the defect that when the electromagnetic valve is independently powered off, the guide cannot work normally, and a shutdown fault can occur.
Disclosure of Invention
The utility model aims to provide a guide hydraulic control device of a roughing mill, which solves the defects of the conventional guide hydraulic control device of the roughing mill.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an aspect of the embodiments of the present utility model provides a roughing mill guide hydraulic control device, including: the hydraulic system comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder and a fourth hydraulic cylinder; the output end of the first proportional pressure reducing valve is communicated with rod cavities at the lower ends of the first hydraulic cylinder and the second hydraulic cylinder through high-pressure pipelines, and oil return ends of the first proportional pressure reducing valve, the second proportional pressure reducing valve, the first proportional pressure reducing valve and the second proportional pressure reducing valve are all connected with an oil tank; the first positioning electromagnetic directional valve is connected with the first constant pressure reducing valve and the first proportional reducing valve, and the second positioning electromagnetic directional valve is connected with the second constant pressure reducing valve and the second proportional reducing valve.
In some embodiments, the hydraulic control device further includes a first pressure detection switch for detecting pressures of upper rodless cavities of the first and second hydraulic cylinders, a second pressure detection switch for detecting lower rod cavities of the first and second hydraulic cylinders, a third pressure detection switch for detecting upper rodless cavity pressures of the third and fourth hydraulic cylinders, and a fourth pressure detection switch for detecting lower rod cavity pressures of the third and fourth hydraulic cylinders.
In some embodiments, the hydraulic control device further includes a first pilot operated check valve and a second pilot operated check valve, the first pilot operated check valve is disposed between the first proportional pressure reducing valve and the second pressure detecting switch, when the first pilot operated check valve is closed, oil can only flow unidirectionally from the first proportional pressure reducing valve to the second pressure detecting switch, the second pilot operated check valve is disposed between the second proportional pressure reducing valve and the fourth pressure detecting switch, and when the second pilot operated check valve is closed, oil can only flow unidirectionally from the second proportional pressure reducing valve to the fourth pressure detecting switch.
In some embodiments, the hydraulic control device further comprises a first pilot valve and a second pilot valve, the first pilot valve being connected to control the first pilot check valve, the second pilot valve being connected to control the second pilot check valve.
In some embodiments, the hydraulic control device further comprises an inlet guide and an outlet guide, wherein two ends of the top of the inlet guide are connected with the bottoms of the rods of the first hydraulic cylinder and the second hydraulic cylinder, and two ends of the top of the outlet guide are connected with the bottoms of the rods of the third hydraulic cylinder and the fourth hydraulic cylinder.
The roughing mill guide hydraulic control device provided by the embodiment of the utility model has at least the following beneficial effects: when the pilot rises, the proportional pressure reducing valve inputs oil in the oil tank to the rod cavity of the hydraulic cylinder through the pilot-operated check valve, the oil in the rodless cavity of the hydraulic cylinder flows back to the oil tank through the constant pressure reducing valve, when the power is suddenly cut off, the pilot stops rising, the pilot-operated check valve is in a closed state, the oil can only flow from the proportional pressure reducing valve to the pressure detection switch, at the moment, the hydraulic cylinder has a falling trend due to the fact that the pilot Wei Chongli is downward, the pilot also drives the oil to press the trend of the proportional pressure reducing valve from the pressure detection switch, but the pilot is prevented from flowing back due to the fact that the pilot is locked due to the fact that the pilot is in a closed state, the pilot is prevented from falling down, and a rolling slab and the pilot collision accident caused by the pilot falling during the sudden power cut off is prevented.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a roughing mill pilot hydraulic oil circuit structure according to an embodiment.
The reference numerals are explained as follows: 1. a first hydraulic cylinder; 2. a second hydraulic cylinder; 3. a third hydraulic cylinder; 4. a fourth hydraulic cylinder; 5. a first constant pressure reducing valve; 6. a second constant pressure reducing valve; 7. a first proportional pressure reducing valve; 8. a second proportional pressure reducing valve; 9. a first positioning electromagnetic directional valve; 10. a second positioning electromagnetic directional valve; 11. a first pressure detection switch; 12. a second pressure detection switch; 13. a third pressure detection switch; 14. a fourth pressure detection switch; 15. a first pilot operated check valve; 16. a second pilot operated check valve; 17. a first pilot valve; 18. a second pilot valve; 19. an inlet guide; 20. and (5) an outlet guide.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and "third" 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", "a second", or a third "may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.
The following is a brief description of the technical solution of the embodiments of the present application:
according to some embodiments, as shown in fig. 1, the present application provides a roughing mill pilot hydraulic control device, the hydraulic control device comprising:
a first hydraulic cylinder 1, a second hydraulic cylinder 2, a third hydraulic cylinder 3 and a fourth hydraulic cylinder 4;
the hydraulic oil system comprises a first constant pressure reducing valve 5, a second constant pressure reducing valve 6, a first proportional reducing valve 7 and a second proportional reducing valve 8, wherein the output end of the first constant pressure reducing valve 5 is communicated with the upper rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 through a high-pressure pipeline, the output end of the second constant pressure reducing valve 6 is communicated with the upper rodless cavities of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 through a high-pressure pipeline, the output end of the first proportional reducing valve 7 is communicated with the lower ends of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 through a high-pressure pipeline, the output end of the second proportional reducing valve 8 is communicated with the lower rod cavities of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 through a high-pressure pipeline, and the oil return ends of the first constant pressure reducing valve 5, the second constant pressure reducing valve 6, the first proportional reducing valve 7 and the second proportional reducing valve 8 are all connected with an oil tank;
the first positioning electromagnetic directional valve 9 and the second positioning electromagnetic directional valve 10, wherein the first positioning electromagnetic directional valve 9 is connected with the first constant pressure reducing valve 5 and the first proportional reducing valve 7, and the second positioning electromagnetic directional valve 10 is connected with the second constant pressure reducing valve 6 and the second proportional reducing valve 8.
Based on the above embodiment, when the rods of the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 need to be lifted, the first proportional pressure reducing valve 7 inputs the oil in the oil tank to the rod cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, the rodless cavity oil of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 flows back to the oil tank through the first constant pressure reducing valve 5, the second proportional pressure reducing valve 8 inputs the oil in the oil tank to the rod cavities of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4, and the rodless cavity oil of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 flows back to the oil tank through the second constant pressure reducing valve 6.
When the rods of the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 are required to descend, the first constant-pressure relief valve 5 inputs oil in an oil tank into rodless cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, the oil in the rod cavities of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 flows back to the oil tank through the first proportional relief valve 7, the second constant-pressure relief valve 6 inputs the oil in the oil tank into rodless cavities of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4, and the oil in the rod cavities of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 flows back to the oil tank through the second proportional relief valve 8.
The preferred embodiments of the present disclosure are further elaborated below in conjunction with fig. 1 of the present specification.
According to some embodiments, the hydraulic control device further comprises a first pressure detection switch 11, a second pressure detection switch 12, a third pressure detection switch 13 and a fourth pressure detection switch 14, wherein the first pressure detection switch 11 is used for detecting the rod-free cavity pressures at the upper ends of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, the second pressure detection switch is used for detecting the rod-free cavity pressures at the lower ends of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, the third pressure detection switch 13 is used for detecting the rod-free cavity pressures at the upper ends of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4, and the fourth pressure detection switch 14 is used for detecting the rod-free cavity pressures at the lower ends of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4.
Based on the above embodiment, the first pressure detection switch 11 is configured to detect the rodless cavity pressures of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and set a pressure alarm, and when the pressure is lower than a set value, the first pressure detection switch 11 sends out an alarm prompt; the second pressure detection switch 12 is used for detecting the rod cavity pressures of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, setting pressure alarm, and when the pressure is lower than a set value, the second pressure detection switch 12 sends out alarm prompt; the third pressure detection switch 13 is used for detecting the rodless cavity pressures of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4, setting pressure alarm, and when the pressure is lower than a set value, the third pressure detection switch 13 sends out an alarm prompt; the fourth pressure detection switch 14 is used for detecting the rod cavity pressures of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4, setting pressure alarm, and when the pressure is lower than the set value, the fourth pressure detection switch 14 sends out alarm prompt.
According to some embodiments, the hydraulic control device further includes a first pilot check valve 15 and a second pilot check valve 16, where the first pilot check valve 15 is disposed between the first proportional pressure reducing valve 7 and the second pressure detecting switch 12, when the first pilot check valve 15 is closed, oil can only flow unidirectionally from the first proportional pressure reducing valve 7 to the second pressure detecting switch 12, the second pilot check valve 16 is disposed between the second proportional pressure reducing valve 8 and the fourth pressure detecting switch 14, and when the second pilot check valve 16 is closed, oil can only flow unidirectionally from the second proportional pressure reducing valve 8 to the fourth pressure detecting switch 14.
Further, the hydraulic control device further comprises a first pilot valve 17 and a second pilot valve 18, wherein the first pilot valve 17 is connected with and controls the first hydraulic control check valve 15, and the second pilot valve 18 is connected with and controls the second hydraulic control check valve 16.
Further, the hydraulic control device further comprises an inlet guide 19 and an outlet guide 20, wherein the two ends of the top of the inlet guide 19 are connected with the bottoms of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and the two ends of the top of the outlet guide 20 are connected with the bottoms of the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4.
Based on the above embodiment, when the pilot valve is suddenly powered off, the pilot valve is powered off to stop working, the pilot check valve is in a closed state, oil can only flow from the proportional pressure reducing valve to the pressure detection switch, at the moment, the hydraulic cylinder has a falling trend due to the guide Wei Chongli, and the hydraulic cylinder can also drive the oil to press back to the trend of the proportional pressure reducing valve from the pressure detection switch, but the pilot check valve is in a closed state, so that the oil is prevented from flowing back, the guide is locked, the guide is not allowed to fall, and the collision accident between a rolled slab and the guide caused by the falling of the guide when the pilot is suddenly powered off is prevented.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (5)
1. A roughing mill pilot hydraulic control device, characterized in that the hydraulic control device system comprises:
the hydraulic system comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder and a fourth hydraulic cylinder;
the output end of the first proportional pressure reducing valve is communicated with rod cavities at the lower ends of the first hydraulic cylinder and the second hydraulic cylinder through high-pressure pipelines, and oil return ends of the first proportional pressure reducing valve, the second proportional pressure reducing valve, the first proportional pressure reducing valve and the second proportional pressure reducing valve are all connected with an oil tank;
the first positioning electromagnetic directional valve is connected with the first constant pressure reducing valve and the first proportional reducing valve, and the second positioning electromagnetic directional valve is connected with the second constant pressure reducing valve and the second proportional reducing valve.
2. The hydraulic control apparatus according to claim 1, further comprising a first pressure detection switch for detecting pressures of upper rodless chambers of the first and second hydraulic cylinders, a second pressure detection switch for detecting lower rod chambers of the first and second hydraulic cylinders, a third pressure detection switch for detecting upper rodless chamber pressures of the third and fourth hydraulic cylinders, and a fourth pressure detection switch for detecting lower rod chamber pressures of the third and fourth hydraulic cylinders.
3. The hydraulic control device of claim 2, further comprising a first pilot operated check valve and a second pilot operated check valve, wherein the first pilot operated check valve is disposed between the first proportional pressure reducing valve and the second pressure detecting switch, and when the first pilot operated check valve is closed, oil can only flow unidirectionally from the first proportional pressure reducing valve to the second pressure detecting switch, and the second pilot operated check valve is disposed between the second proportional pressure reducing valve and the fourth pressure detecting switch, and when the second pilot operated check valve is closed, oil can only flow unidirectionally from the second proportional pressure reducing valve to the fourth pressure detecting switch.
4. The hydraulic control device of claim 3, further comprising a first pilot valve operatively connected to control the first pilot check valve and a second pilot valve operatively connected to control the second pilot check valve.
5. The hydraulic control device of claim 4, further comprising an inlet guide and an outlet guide, wherein the top ends of the inlet guide are connected to the bottoms of the first and second hydraulic cylinders, and the top ends of the outlet guide are connected to the bottoms of the third and fourth hydraulic cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321981880.6U CN220622302U (en) | 2023-07-26 | 2023-07-26 | Roughing mill guide hydraulic control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321981880.6U CN220622302U (en) | 2023-07-26 | 2023-07-26 | Roughing mill guide hydraulic control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220622302U true CN220622302U (en) | 2024-03-19 |
Family
ID=90233183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321981880.6U Active CN220622302U (en) | 2023-07-26 | 2023-07-26 | Roughing mill guide hydraulic control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220622302U (en) |
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2023
- 2023-07-26 CN CN202321981880.6U patent/CN220622302U/en active Active
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