Anti-blocking device of heavy rail rolling mill
The hydraulic cylinder system with electromagnetic valves adjusts the roll gap in real-time to prevent and resolve steel jamming in heavy rail rolling mills, ensuring continuous production and minimizing mechanical damage.
Patent Information
- Application Number
- CN202421035572.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-14
AI Technical Summary
Existing anti-jamming devices for heavy rail rolling mills are ineffective in the rough rolling process, leading to steel billet jamming, which causes production disruptions and mechanical damage, and cannot be adjusted online to prevent such occurrences.
A hydraulic cylinder system with electromagnetic reversing valves and pressure control mechanisms is installed between the rolling mill arch and the lower roller bearing seat, allowing real-time adjustment of the roll gap to prevent and resolve steel jamming by controlling the lower roller's height.
The system effectively prevents and quickly resolves steel jamming during rolling, maintaining production continuity and reducing mechanical damage by dynamically adjusting the roll gap in response to pressure changes.
Smart Images
Figure CN222241936U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of rail rolling and profile rolling mills, and in particular relates to an anti-jamming device for a BD2 rough rolling mill of a heavy rail production line. Background Art
[0002] At present, in the rolling process of heavy rail products, due to the uncontrollable size of incoming materials, the hole type of the BD2 rolling mill does not match the size of the incoming steel billet, the rolling force increases instantly, and the steel billet is stuck in the hole type of the roller. After the failure, oxygen acetylene is required to flame cut the steel billet, which takes a long time. Not only does it affect the continuity of production, it may cause the upper roller pressing down transmission mechanism to overload, resulting in damage to the pressing screw and nut of the BD2 rolling mill; it may cause the roller to overload and cause the roller to break.
[0003] In the prior art, patent application number CN202220796423.9 discloses an anti-stuck device for railway rail transmission. By setting a transition device with a top tilt in the direction of the rail travel, the end of the rail can be prevented from being stuck with the supporting drive wheel due to the downward tilt, which affects the normal transmission. However, the device can only lift the end of the rail and cannot be used in the rough rolling process of the rail. Patent application number CN200820193151.3 discloses a new type of guide beam for a universal heavy rail rolling mill. With the guide bracket as the center, "L"-shaped guard adjustment pads are symmetrically installed on the guide beams on both sides of the guide beam. One end of the adjustment pad is tightly against the guide bracket, and the end with the adjustment screw is adjacent to the end of the guide beam. It can effectively prevent the guide from running off and shorten the guide adjustment time. The adjustment accuracy is greatly improved and the labor intensity is greatly reduced. However, this technical solution cannot be applied in the rough rolling process of the rail, and it is impossible to adjust it online at any time, and the jamming phenomenon cannot be avoided. Summary of the invention
[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an anti-stuck device for a heavy rail rolling mill, which can adjust the roll gap online and solve the problem of steel jamming when the rolling mill is rolling steel.
[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:
[0006] A device for preventing jamming of a heavy rail rolling mill comprises a hydraulic cylinder, a first electromagnetic reversing valve, a second electromagnetic reversing valve, a pressure reducing valve, a relief valve, a pressure oil pipeline and an oil return pipeline. The hydraulic cylinder is arranged between a rolling mill arch and a lower roller bearing seat. The pressure oil pipeline and a rodless cavity of the hydraulic cylinder are both connected to a P port of the first electromagnetic reversing valve, a T port of the first electromagnetic reversing valve is connected to the oil return pipeline, a A port of the first electromagnetic reversing valve is connected to a A port of the second electromagnetic reversing valve, a B port of the second electromagnetic reversing valve is connected to a rod cavity of the hydraulic cylinder, a T port of the second electromagnetic reversing valve is connected to the oil return pipeline, an oil outlet of the pressure reducing valve is connected to a P port of the second electromagnetic reversing valve, an oil inlet of the pressure reducing valve is connected to a pressure oil pipeline, an oil inlet of the relief valve is connected to a rodless cavity of the hydraulic cylinder, and an oil outlet of the relief valve is connected to the oil return pipeline.
[0007] The electromagnetic reversing valve 1 is a two-position three-way electromagnetic reversing valve, and the electromagnetic reversing valve 2 is a three-position four-way electromagnetic reversing valve.
[0008] A one-way valve is connected between the rod chamber of the hydraulic cylinder and the oil return pipeline.
[0009] A movable gasket is arranged between the hydraulic cylinder and the lower roller bearing seat.
[0010] The hydraulic cylinder is fixedly connected to the rolling mill arch by bolts.
[0011] The rod chamber of the hydraulic cylinder and the rodless chamber of the hydraulic cylinder are both connected with pressure measuring joints.
[0012] The pressure measuring joint is connected with the pressure sensor.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The anti-stuck device of the heavy rail rolling mill installs a hydraulic cylinder between the rolling mill arch and the lower roller bearing seat. When the heavy rail product is in the rolling state, the piston rod rises and falls to adjust the height of the lower roller to adjust the roll gap, effectively avoiding the occurrence of steel jams and quickly handling steel jams after they occur. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] Figure 2 It is a schematic diagram of the hydraulic system of the utility model.
[0017] Figure 3 It is a schematic diagram of the hydraulic control unit of the utility model.
[0018] In the figure: 1-hydraulic cylinder 2-pressure sensor 3-overflow valve 4-solenoid reversing valve 1 5-pressure reducing valve 6-solenoid reversing valve 2 7-check valve 8-pressure oil pipeline 9-oil return pipeline 10-pressure measuring joint 11-rod chamber 12-rodless chamber 13-mounting block 14-hydraulic cylinder body 15-oil inlet hole 16-oil return hole 17-sealing ring 18-piston rod 19-cylinder gasket 20-movable gasket 21-lower roller bearing seat 22-lower roller of rolling mill. DETAILED DESCRIPTION
[0019] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.
[0020] See Figure 1 , Figure 2 An anti-stuck device for a heavy rail rolling mill comprises a hydraulic cylinder 1, an electromagnetic reversing valve 1 4, an electromagnetic reversing valve 2 6, a pressure reducing valve 5, a relief valve 3, a pressure oil pipeline 8, and an oil return pipeline 9. The hydraulic cylinder 1 is arranged between the rolling mill arch and the lower roll bearing seat 21, and a mounting block 13 is fixed on the rolling mill arch. The mounting block 13 is fixedly connected to the hydraulic cylinder body 14 by bolts. The pressure oil pipeline 8 and the rodless chamber 12 of the hydraulic cylinder 1 are both connected to the P port of the electromagnetic reversing valve 1 4, the T port of the electromagnetic reversing valve 1 4 is connected to the oil return pipeline 9, the A port of the electromagnetic reversing valve 1 4 is connected to the A port of the electromagnetic reversing valve 2 6, the B port of the electromagnetic reversing valve 2 6 is connected to the rod chamber 11 of the hydraulic cylinder 1, the T port of the electromagnetic reversing valve 2 6 is connected to the oil return pipeline 9, the oil outlet of the pressure reducing valve 5 is connected to the P port of the electromagnetic reversing valve 2 6, the oil inlet of the pressure reducing valve 5 is connected to the pressure oil pipeline 8, the pressure setting value of the pressure reducing valve 5 is 110 bar, and the pressure at the outlet of the pressure reducing valve 5 is kept constant. The pressure of the hydraulic oil delivered by the pressure oil pipeline 8 is 300 bar. The oil inlet of the relief valve 3 is connected to the rodless chamber 12 of the hydraulic cylinder 1, and the oil outlet of the relief valve 3 is connected to the oil return pipeline 9. The pressure setting value of the relief valve 3 is 400 bar, which is greater than the normal working pressure. When the pressure transmitted from the roller bearing seat 21 is greater than the setting value, the relief valve 3 opens to overflow, thereby playing a protective role.
[0021] Among them, the electromagnetic reversing valve 1 4 is a two-position three-way electromagnetic reversing valve, and the electromagnetic reversing valve 2 6 is a three-position four-way electromagnetic reversing valve. A one-way valve 7 is connected between the rod chamber 11 of the hydraulic cylinder 1 and the return oil pipeline 9 to maintain a certain pressure in the rod chamber, increase the stability of the movement of the hydraulic cylinder 1, and reduce the creeping and forward rushing of the hydraulic cylinder 1. A movable gasket 20 is provided between the hydraulic cylinder 1 and the lower roller bearing seat 21, and the cylinder gasket 19 is connected to the piston rod 18 by bolts, and the movable gasket 20 is connected to the cylinder gasket 19 by bolts. If the diameter of the lower roller is too small during steel rolling, the stroke of the hydraulic cylinder will increase, which may exceed the maximum extension of the hydraulic cylinder piston rod, and the movable gasket is used to compensate for the reduction in the roll neck. The maximum diameter of the lower roller is 987mm, and the thickness of the movable gasket 20 is 90mm. For every 10mm reduction in the roller diameter, the thickness of the movable gasket 20 increases by 5mm. The hydraulic cylinder 1 is fixedly connected to the mill arch by bolts. The rod chamber 11 of the hydraulic cylinder 1 and the rodless chamber 12 of the hydraulic cylinder 1 are both connected to a pressure measuring joint 10, and a pressure sensor 2 is connected to the pressure measuring joint 10 to facilitate fault diagnosis. Among them, a pressure sensor 2 with a range of 350 bar is connected to the oil line connecting the rodless chamber 12 of the hydraulic cylinder 1 and the P port of the electromagnetic reversing valve 4.
[0022] The rodless chamber 12 of the hydraulic cylinder 1 is provided with an oil inlet hole 15, and the rod chamber 11 of the hydraulic cylinder 1 is provided with an oil return hole 16. The HM46 anti-wear hydraulic oil enters the rodless chamber 12 of the hydraulic cylinder 1 through the oil inlet hole 15 from the pressure oil pipeline 8 to push the piston rod 18 of the hydraulic cylinder 1 upward, and the return oil of the rod chamber 11 flows back to the oil return pipeline 9 through the oil return hole 16. The piston rod 18 pushes the lower roller bearing seat 21 to make the lower roller 22 of the rolling mill rise and enter the normal rolling mode. During the up and down movement of the piston rod 18, the sealing ring 17 between the hydraulic cylinder body 14 and the piston rod 18 can prevent the hydraulic oil from leaking out. See the hydraulic control unit Figure 3 The control unit includes a power module, a communication module, an analog input module, and a digital output module, which are connected through ports. The control unit is a slave PLC, the communication module is connected to the master PLC through a port, and the master PLC is connected to the human-machine interaction screen through a port.
[0023] During the rolling process, the pressure sensor 2 constantly detects the hydraulic oil pressure of the rodless chamber 12 and sends it to the electronic control system through the analog-to-digital conversion module. When the steel billet is stuck, the hydraulic oil pressure is above the set value of 320 bar, the a-end of the electromagnetic reversing valve 26 is energized, the valve body moves to the right, and the hydraulic oil passing through the pressure reducing valve 5 flows into the rod chamber 11 of the hydraulic cylinder 1 through the electromagnetic reversing valve 26. At the same time, the a-end solenoid valve of the electromagnetic reversing valve 14 is energized, the solenoid valve moves to the right, and the hydraulic oil in the rodless chamber 12 flows back to the return oil pipeline 9 through the electromagnetic reversing valve 14 and the electromagnetic reversing valve 26. The piston rod 18 moves downward quickly, and the roll gap of the rolling mill increases, which allows the steel billet to pass smoothly, effectively preventing the occurrence of steel jamming, and greatly saving the time cost of handling steel jamming accidents.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] Through the above specific implementations, those skilled in the art can easily implement the utility model. However, it should be understood that the utility model is not limited to the above specific implementations. On the basis of the disclosed implementations, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.
Claims
1. An anti-stuck device for a heavy rail rolling mill, characterized in that: It includes a hydraulic cylinder, an electromagnetic reversing valve 1, an electromagnetic reversing valve 2, a pressure reducing valve, an overflow valve, a pressure oil pipeline, and an oil return pipeline. The hydraulic cylinder is arranged between the rolling mill arch and the lower roller bearing seat. The pressure oil pipeline and the rodless cavity of the hydraulic cylinder are connected to the P port of the electromagnetic reversing valve 1, the T port of the electromagnetic reversing valve 1 is connected to the oil return pipeline, the A port of the electromagnetic reversing valve 1 is connected to the A port of the electromagnetic reversing valve 2, the B port of the electromagnetic reversing valve 2 is connected to the rod cavity of the hydraulic cylinder, the T port of the electromagnetic reversing valve 2 is connected to the oil return pipeline, the oil outlet of the pressure reducing valve is connected to the P port of the electromagnetic reversing valve 2, the oil inlet of the pressure reducing valve is connected to the pressure oil pipeline, the oil inlet of the overflow valve is connected to the rodless cavity of the hydraulic cylinder, and the oil outlet of the overflow valve is connected to the oil return pipeline.
2. The anti-jamming device for a heavy rail rolling mill according to claim 1, characterized in that: The electromagnetic reversing valve 1 is a two-position three-way electromagnetic reversing valve, and the electromagnetic reversing valve 2 is a three-position four-way electromagnetic reversing valve.
3. The anti-jamming device for a heavy rail rolling mill according to claim 1, characterized in that: A one-way valve is connected between the rod chamber of the hydraulic cylinder and the oil return pipeline.
4. The anti-jamming device for a heavy rail rolling mill according to claim 1, characterized in that: A movable gasket is arranged between the hydraulic cylinder and the lower roller bearing seat.
5. The anti-jamming device for a heavy rail rolling mill according to claim 1, characterized in that: The hydraulic cylinder is fixedly connected to the rolling mill arch by bolts.
6. The anti-jamming device for a heavy rail rolling mill according to claim 1, characterized in that: The rod chamber of the hydraulic cylinder and the rodless chamber of the hydraulic cylinder are both connected with pressure measuring joints.
7. The anti-jamming device for a heavy rail rolling mill according to claim 6, characterized in that: The pressure measuring joint is connected with the pressure sensor.