Anti-oil-leakage roll bending device of rolling mill
By adding oil circuit switching devices and collection containers to the rolling mill roll bending device, the oil leakage problem caused by damage of traditional roll bending devices is solved, and the rapid and efficient treatment of rolling blocks and normal maintenance of rolling steel production is achieved.
Patent Information
- Application Number
- CN202421735021.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-22
AI Technical Summary
During the rolling process of steel plate, traditional roll bending devices are prone to damage to the pressure gland, hydraulic hose and sealing elements, causing oil leakage or oil leakage from the bend rolling block, which in turn affects the steel rolling production.
A roll bending device for anti-leakage rolling mill is designed. By adding an oil circuit switching device and a collection container to the roll bending device, the back pressure oil circuit of the abnormal plunger cylinder is switched by the main valve and the auxiliary valve to avoid oil leakage, and temporarily connect the rod cavity and the back pressure oil supply pipe when changing the rollers.
It effectively avoids the bending roller block failure due to oil leakage, maintains the normal progress of steel rolling production, reduces unplanned parking time, and reduces maintenance difficulty and time-consuming.
Smart Images
Figure CN222931549U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a rolling mill roll bending device, which can prevent the roll bending block from oil seepage or oil leakage due to damage of a gland, a hydraulic hose and related sealing elements of the roll bending block, and belongs to the technical field of metal rolling. Background Art
[0002] The roll bending device is a key component of the hot rolling wide and thick plate mill. Each mill is usually equipped with 4 roll bending devices, such as Figure 4 During the steel plate rolling process, the bending roll device ensures the positive or negative bending function of the working roll, realizes the adjustment and precision control of the rolled plate shape, and plays an important role in improving the quality of the rolled plate shape.
[0003] like Figure 5 As shown, the conventional roll bending device includes a roll bending block 01 and a hydraulic hose 02. The roll bending block 01 contains 4 plunger cylinders and is provided with a rodless cavity and a rod cavity. The working pressure acts on the rodless cavity to realize the roll bending function, and the back pressure acts on the rod cavity to maintain the working stability of the plunger. In the actual production process, the working environment of the roll bending block 01 is harsh and the working conditions are complex. The roll bending block 01 has high working pressure, frequent movements, and is subjected to large rolling impact. Its plunger 011 is prone to scratches, and the key parts such as the gland 012 and its internal gland seal 013, the hydraulic hose 02, the hose joint and the seal 021 are extremely easy to be damaged, causing the roll bending block to seep or leak oil, and then causing the roll bending block to fail as a whole.
[0004] Usually, the back pressure oil supply pipe 03 at the front end of the hydraulic hose 02 is a shared main pipe, so the back pressure oil circuit of the abnormal plunger cylinder cannot be directly closed or cut off. If a valve is added between the pipelines to cut off the oil circuit of the abnormal plunger cylinder, although oil leakage can be prevented, the liquid or gas in the rod cavity cannot circulate normally, which can easily cause the plunger to get stuck and cause the internal pressure of the bending roller block to increase instantly, damaging the oil pipe and other components.
[0005] If the hydraulic hose 02 connected to the abnormal plunger cylinder is directly removed, and the hard pipe joint of the oil source is sealed with a plug (the back pressure oil supply pipe 03 is a hard pipe), although oil leakage can be avoided and the plunger cylinder can barely be used without backup pressure, when replacing the roll, after the old working roll is pulled out, the upper plunger will automatically extend and cannot be retracted under the residual pressure of the rodless chamber, and the lower plunger will automatically extend and cannot be retracted under the combined action of the plunger gravity and the residual pressure of the rodless chamber, resulting in the new roll being unable to be pushed into place smoothly, thereby preventing the normal replacement of the roll.
[0006] Therefore, in the past, when encountering such problems, it was only possible to passively stop the vehicle and replace the bending roll block or replace the gland and gland seal. However, due to limited space, the difficulty of maintenance work increased, resulting in high labor intensity for workers and long maintenance time (6 - 16 hours). Such unplanned stops would also seriously affect the previous and subsequent processes, such as steelmaking, ironmaking, gas balance, contract delivery, etc., disrupting the normal production organization plan and seriously affecting the normal production rhythm. Therefore, there is an urgent need for a new technical solution to solve the above problems. Summary of the Utility Model
[0007] The purpose of the present utility model is to provide an anti-oil leakage rolling mill bending roll device for the drawbacks of the existing technology, so as to prevent oil leakage or seepage of the bending roll block caused by damage to the gland, hydraulic hose and related sealing elements of the bending roll block, and ensure the normal progress of steel rolling production.
[0008] To achieve the above purpose, the present utility model adopts the following technical solutions:
[0009] An anti-oil leakage rolling mill bending roll device includes a bending roll block, a hydraulic hose, a collection container and an oil circuit switching device. A plunger cylinder is provided in the bending roll block. The plunger cylinder is provided with a rodless chamber and a rod chamber, and the rodless chamber and the rod chamber are respectively connected to different hydraulic hoses. The other end of the hydraulic hose connected to the rodless chamber is connected to the working pressure oil supply pipe, and the other end of the hydraulic hose connected to the rod chamber is connected to the back pressure oil supply pipe and the collection container through the oil circuit switching device, so that the rod chamber is communicated with the back pressure oil supply pipe or the collection container.
[0010] For the above anti-oil leakage rolling mill bending roll device, the oil circuit switching device includes a main valve, an auxiliary valve and a collection pipe. The inlet side of the main valve is connected to the back pressure oil supply pipe, and the outlet side is connected to the rod chamber of the plunger cylinder through a hydraulic hose. One end of the auxiliary valve is connected to the outlet side of the main valve, and the other end is connected to the collection container through the collection pipe.
[0011] For the above anti-oil leakage rolling mill bending roll device, both the main valve and the auxiliary valve are ball valves.
[0012] For the above anti-oil leakage rolling mill bending roll device, between the main valve and the hydraulic hose, and between the main valve and the back pressure oil supply pipe, they are connected by threads or flanges.
[0013] For the above anti-oil leakage rolling mill bending roll device, between the auxiliary valve and the collection pipe, they are connected by a thread coupling.
[0014] For the above anti-oil leakage rolling mill bending roll device, the collection pipe is a flexible hose.
[0015] For the above anti-oil leakage rolling mill bending roll device, the collection container is a cuboid or cylindrical container.
[0016] Based on the traditional roll bending device, the utility model adds a collection container and an oil circuit switching device. When the roll bending block leaks oil, the oil circuit switching device connects the rod chamber of the plunger cylinder with the collection container, avoiding oil leakage and maintaining the production line operation; when changing the rolls of the rolling mill, the rod chamber is temporarily connected to the back pressure oil supply pipe, avoiding long-term unplanned shutdowns and ensuring the normal progress of steel rolling production. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The following further elaborates on the present utility model in conjunction with the drawings and specific embodiments.
[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0019] Figure 2 is a structural schematic diagram of the main valve and the auxiliary valve;
[0020] Figure 3 is a structural schematic diagram of another joint form of the main valve and the auxiliary valve;
[0021] Figure 4 is an application schematic diagram of the roll bending block in the rolling mill;
[0022] Figure 5 is a structural schematic diagram of the traditional roll bending block.
[0023] The reference numerals in the drawings are as follows: 01, roll bending block; 011, plunger; 012, gland; 013, gland seal; 02, hydraulic hose; 021, hose joint; 03, back pressure oil supply pipe.
[0024] 1, main valve; 101, main switch; 102, split SAE flange; 103, integral SAE flange; 2, auxiliary valve; 201, auxiliary valve switch; 202, stud; 3, collection pipe; 4, collection container. SPECIFIC EMBODIMENTS
[0025] In view of the deficiencies in the prior art, the present utility model provides an anti-oil leakage roll bending device for a rolling mill. This device avoids oil leakage by quickly switching the back pressure oil circuit of the abnormal plunger cylinder, maintaining the use of the abnormal plunger cylinder and the production line operation, and solving the problems existing in the background art.
[0026] As Figures 1-3 shown, the present utility model includes a roll bending block 01, a hydraulic hose 02, a collection container 4, and an oil circuit switching device. The roll bending block 01 contains 4 plunger cylinders, and each plunger cylinder is provided with a rodless chamber and a rod chamber. The rodless chamber and the rod chamber are respectively connected to the working pressure oil supply pipe and the back pressure oil supply pipe 03 through different hydraulic hoses 02. The oil circuit switching device includes a main valve 1, an auxiliary valve 2, and a collection pipe 3.
[0027] The main valve 1 is a ball valve or other high-pressure valve, with a main switch 101 in the middle. One end of the main valve 1 is the inlet side, provided with a split SAE flange 102, whose structure is the same as the hose joint 021 at the end of the hydraulic hose 02, and can be connected to the hard pipe joint of the backpressure oil supply pipe 03; the other end of the main valve 1 is the outlet side, provided with an integral SAE flange 103, whose structure is the same as the hard pipe joint of the backpressure oil supply pipe 03, and can be connected to the hose joint 021 at the end of the hydraulic hose 02.
[0028] The auxiliary valve 2 is a ball valve or other high-pressure valve, with an auxiliary valve switch 201 in the middle. One end of the auxiliary valve 2 is connected to the outlet side of the main valve 1, and the other end is provided with a coupling 202.
[0029] The collecting pipe 3 is a flexible hose, and the collecting container 4 is a cuboid or cylindrical container, placed at a fixed position. One end of the collecting pipe 3 is connected to the coupling 202 of the auxiliary valve 2, and the other end is connected to the collecting container 4, for collecting residual hydraulic oil.
[0030] As Figure 1 shown, the specific usage method of the present utility model is as follows:
[0031] Install the oil circuit switching device between the backpressure oil supply pipe 03 and the hydraulic hose 02. Under normal circumstances, the main valve 1 is open, the auxiliary valve 2 is closed, the oil circuit supplies oil normally, and no operation is required.
[0032] When the gland of the bending roll block, the hydraulic hose and related sealing elements are damaged, resulting in oil leakage or seepage in the bending roll block, close the main valve 1 and open the auxiliary valve 2, cut off the oil circuit of the rod chamber of the abnormal plunger cylinder, and at the same time communicate with the outside through the auxiliary valve 2. Relying on the action of the mill screwdown, the self-weight of the roll and other normal plunger cylinders, the plunger cylinder can continue to be used to maintain the normal production of the production line.
[0033] When the mill needs to retract the plunger during roll change, the auxiliary valve 2 can be temporarily closed and the main valve 1 can be opened to retract the plunger to complete the roll change. When subsequent planned maintenance is carried out, replace the hydraulic cylinder or the seal of the plunger gland, etc. After returning to normal, open the main valve 1 and close the auxiliary valve 2.
[0034] The present utility model can adjust the joint form of the oil circuit switching device according to the actual joint form of the backpressure oil supply pipe 03 and the hydraulic hose 02. As Figure 3 shown, it is the joint form of threaded connection. The oil circuit switching device of the present utility model is not only applicable to the bending roll block of the mill, but also applicable to hydraulic cylinders with the same principle and function, multiple groups of cooperating plunger cylinders, or hydraulic cylinders relying on gravity or other external forces (such as the track lifting cylinder of the mill, the roll system lifting cylinder of the straightening machine, etc.).
[0035] The beneficial effects of adopting the above technical solutions are as follows: The collection container and the oil circuit switching device can quickly and efficiently handle the leaking bending roller block to maintain the production line operation, avoid long-term unplanned shutdown of the production line, ensure the normal connection of the front and back processes of the production line, maintain the normal production organization plan, and gain time for subsequent normal maintenance. In addition, this device also has the advantages of simple structure, low manufacturing cost, convenient and fast operation, etc.
Claims
1. An oil leakage-proof rolling mill roll bending device, characterized in that: The invention comprises a roller bending block (01), a hydraulic hose (02), a collecting container (4) and an oil circuit switching device. The roller bending block (01) is provided with a plunger cylinder. The plunger cylinder is provided with a rodless chamber and a rod chamber. The rodless chamber and the rod chamber are respectively connected to different hydraulic hoses (02). The other end of the hydraulic hose (02) connected to the rodless chamber is connected to a working pressure oil supply pipe. The other end of the hydraulic hose (02) connected to the rod chamber is connected to a back pressure oil supply pipe (03) and a collecting container (4) through the oil circuit switching device, so that the rod chamber is connected to the back pressure oil supply pipe (03) or to the collecting container (4).
2. The oil leakage prevention rolling mill roll bending device according to claim 1 is characterized in that: The oil circuit switching device comprises a main valve (1), an auxiliary valve (2) and a collecting pipe (3); the inlet side of the main valve (1) is connected to the back pressure oil supply pipe (03), and the outlet side is connected to the rod chamber of the plunger cylinder through a hydraulic hose (02); one end of the auxiliary valve (2) is connected to the outlet side of the main valve (1), and the other end is connected to the collecting container (4) through the collecting pipe (3).
3. The oil leakage prevention rolling mill roll bending device according to claim 2 is characterized in that: The main valve (1) and the auxiliary valve (2) are both ball valves.
4. The oil leakage preventing rolling mill roll bending device according to claim 3 is characterized in that: The main valve (1) and the hydraulic hose (02), and the main valve (1) and the back pressure oil supply pipe (03) are connected via threads or flanges.
5. The oil leakage preventing rolling mill roll bending device according to claim 4 is characterized in that: The auxiliary valve (2) and the collecting pipe (3) are connected via a thread (202).
6. The oil leakage preventing rolling mill roll bending device according to claim 5 is characterized in that: The collecting pipe (3) is a hose.
7. The oil leakage preventing rolling mill roll bending device according to claim 6 is characterized in that: The collecting container (4) is a rectangular or cylindrical container.