Quick balancing device for hydraulic system of rolling mill

Abstract

The utility model relates to a quick balancing device for a hydraulic system of a rolling mill, which is characterized in that a balancing valve is fixedly mounted on the top surface of a valve block, an inlet pressure flange pipe and an outlet pressure flange pipe are respectively arranged on the side surfaces of the valve block, a pressure oil inlet pressure measuring port and a pressure oil outlet pressure measuring port are formed in the front of the valve block, and an unloading port and an oil return port are formed in the rear of the valve block. The three-way pressure-reducing overflow valve has the advantages that the three-way pressure-reducing overflow valve is arranged on the valve block, the space is small, pipelines are saved, the outer surface of the valve block is subjected to anti-corrosion treatment, and the corrosion resistance is improved; a valve block of the quick balancing device is communicated with an unloading pipeline, an oil return pipeline and an oil inlet pipeline through a high-pressure ball valve, so that maintenance personnel can maintain and replace the valve block conveniently; the valve block is independently mounted, and inlet pressure oil and outlet pressure oil of the valve block are connected through flange pipes, so that maintenance and disassembly are facilitated; pressure measuring points are installed on connecting channels of the side face of the valve block and the inlet pressure flange pipe and the outlet pressure flange pipe respectively, operators can observe the oil supply pressure conveniently, and operation is simple, visual and convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of rolling mill hydraulic system quick balancing device. BACKGROUND

[0002] In hot rolling enterprise, hydraulic balance system is applied very widely, however, in production process, hydraulic lock often appears, for example, 1700 line, in the rolling process of R1 rolling mill, sometimes, valve jamming phenomenon also appears, so that the main shaft of rolling mill cannot be guaranteed in balanced position, high or low pressure can cause the balance angle of main shaft of rolling mill to increase or decrease, so that the gap between main shaft and bearing bush becomes small, causing the big accident of bearing bush and replacement of main shaft. Before modification, the main shaft balance system of rolling mill sees Figure 6 If the existing main shaft balance system of rolling mill is modified, then more hydraulic pipelines need to be set, pipeline is long, and long-time rolling stop is needed for pipeline cleaning, which seriously affects the smooth production of site, and the required hydraulic pressure capacity is insufficient, and installation space is limited, and complicated pipeline is not conducive to inspection and maintenance, which needs to be solved urgently. SUMMARY

[0003] The utility model aims at providing a kind of rolling mill hydraulic system quick balancing device, adopt modular design, small space, reduce hydraulic pipeline, maintenance is convenient, improve the work reliability.

[0004] To achieve the above-mentioned purpose, the utility model realizes by the following technical scheme:

[0005] A kind of rolling mill hydraulic system quick balancing device, including valve block, balance valve is fixedly installed on the top surface of valve block, the side of valve block is respectively equipped with inlet pressure flange pipe, outlet pressure flange pipe, the front of valve block is equipped with pressure oil inlet pressure measuring hole, pressure oil outlet pressure measuring hole, the back of valve block is equipped with unloading port, oil return port, inlet pressure flange pipe is connected with oil inlet pipeline, outlet pressure flange pipe is connected with the oil inlet of quick switching device by pipeline, unloading port is connected with unloading pipeline, oil return port is connected with the oil return port of quick switching device by pipeline, oil return port is connected with oil return pipeline.

[0006] Inlet pressure flange pipe and the oil inlet of balance valve are communicated in valve block, outlet pressure flange pipe and the oil outlet of balance valve are communicated in valve block, unloading port and the oil outlet of balance valve are communicated in valve block, oil return port and the oil return port of balance valve are communicated in valve block.

[0007] Pressure oil inlet pressure measuring hole and the oil inlet of balance valve are communicated in valve block internal passage, pressure gauge one is equipped on pressure oil inlet pressure measuring hole, pressure oil outlet pressure measuring hole and the oil outlet of balance valve are communicated in valve block internal passage, pressure gauge two is equipped on pressure oil outlet pressure measuring hole.

[0008] Quick switching device is three-position four-way electromagnetic reversing valve, and balance valve is three-way pressure relief overflow valve.

[0009] The unloading pipeline and the oil return pipeline are communicated with the oil tank through corresponding high-pressure ball valves, and the oil inlet pipeline is communicated with the high-pressure pump group of the hydraulic system.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] 1. The three-way pressure relief overflow valve is arranged on the valve block, is used for realizing rapid balance, is small in space, saves the pipeline, the outer surface of the valve block is subjected to corrosion prevention treatment due to the complex field environment, and the corrosion resistance is increased;

[0012] 2. The valve block of the rapid balance device is communicated with the unloading pipeline, the oil return pipeline and the oil inlet pipeline through high-pressure ball valves, is convenient for maintenance personnel to maintain and replace, is simple in structure and convenient to disassemble;

[0013] 3. The valve block is independently installed, flange pipes are connected to inlet and outlet pressure oil of the valve block, and live connection is used for unloading and oil return, so that maintenance and disassembly are facilitated;

[0014] 4. Pressure measuring points are respectively arranged on the connection passages of the valve block side surface and the inlet pressure flange pipe and the outlet pressure flange pipe, are respectively connected with pressure gauge one and pressure gauge two, are convenient for an operator to observe oil supply pressure, are simple and intuitive, and are convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the valve block of the rapid balance device of the rolling mill hydraulic system.

[0016] Figure 2 is a side view of the valve block of the rapid balance device of the rolling mill hydraulic system.

[0017] Figure 3 is a top view of the valve block of the rapid balance device of the rolling mill hydraulic system.

[0018] Figure 4 is a schematic view of the valve block of the rapid balance device of the rolling mill hydraulic system.

[0019] Figure 5 is a hydraulic system control diagram of the anti-lock rapid switching device of the hydraulic system.

[0020] Figure 6 is a hydraulic system control diagram of the anti-lock rapid switching device of the hydraulic system before modification.

[0021] In the figure: 1-piston cylinder 2-governor valve 3-excess flow valve 4-liquid control check valve 5-two-position four-way electro-hydraulic reversing valve 7-two-position four-way electromagnetic reversing valve 8-high pressure ball valve 9-fast switching device 10-balancing valve 11-pressure relay 12-control box 13-pressure gauge two 14-pressure gauge one 101-inlet pressure flange pipe 102-outlet pressure flange pipe 103-pressure oil inlet pressure tapping 104-pressure oil outlet pressure tapping 105-valve block 106-unloading port 107-oil return port. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings of the specification, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

[0023] The following examples are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following examples. The methods used in the following examples are all conventional methods unless otherwise specified.

[0024] [Example 1]

[0025] See Figures 1-4 A rolling mill hydraulic system fast balancing device, including valve block 105, the top surface of valve block 105 is fixedly installed with balancing valve 10, the side of valve block 105 is respectively equipped with inlet pressure flange pipe 101, outlet pressure flange pipe 102, the front of valve block 105 is equipped with pressure oil inlet pressure tapping 103, pressure oil outlet pressure tapping 104, the back of valve block 105 is equipped with unloading port 106, oil return port 107, inlet pressure flange pipe 101 and the oil inlet of balancing valve 10 are communicated in the valve block, outlet pressure flange pipe 102 and the oil outlet of balancing valve 10 are communicated in the valve block, unloading port 106 and the oil discharge port of balancing valve 10 are communicated in the valve block, oil return port 107 and the oil return port of balancing valve 10 are communicated in the valve block;Pressure oil inlet pressure tapping 103 and the internal passage of the valve block of the oil inlet of balancing valve are communicated, pressure gauge one 14 is arranged on pressure oil inlet pressure tapping 103, pressure oil outlet pressure tapping 104 and the internal passage of the valve block of the oil outlet of balancing valve are communicated, pressure gauge two 13 is arranged on pressure oil outlet pressure tapping 102;Inlet pressure flange pipe 101 is connected with oil inlet pipeline P, outlet pressure flange pipe 102 and the oil inlet of fast switching device 9 are connected through pipeline, unloading port 106 and unloading pipeline Y are communicated, oil return port 107 and the oil return port of fast switching device 9 are connected through pipeline, oil return port 107 is communicated with oil return pipeline T;Unloading pipeline and oil return pipeline are communicated with oil tank through corresponding high pressure ball valve respectively, oil inlet pipeline is communicated with high pressure pump group;Fast switching device 9 is three-position four-way electromagnetic reversing valve, and balancing valve 10 is three-way pressure relief overflow valve.

[0026] Working process:

[0027] Figure 5 , system pressure oil through the three-way pressure relief overflow valve 6 after decompression into two four-way electro-hydraulic reversing valve 5, two four-way electro-hydraulic reversing valve 5 in the ‖ position, oil to the system, and in the × position, then the plunger cylinder 1 pressure unloading, plunger cylinder 1 begins to decline; two four-way electro-hydraulic reversing valve 5 outlet and hydraulic control check valve 4 is connected, two four-way solenoid reversing valve 7 in the ‖ position, control hydraulic control check valve 4 reverse opening, and in the × position, control check valve 4 can not reverse opening; hydraulic control check valve 4 outlet and speed regulating valve 2 connected to the plunger cylinder 1 pipeline connected for speed control, and overflow valve 3 and plunger cylinder 1 in parallel, when the pressure is too high during rolling, play a safety protection role. High pressure ball valve 8-2 and fast balancing device 10 is connected, the unloading line of fast balancing device 10 and high pressure ball valve 8-3 is connected, high pressure ball valve 8-3 and system unloading line connection, fast balancing device 10 oil return line and high pressure ball valve 8-4 is connected, high pressure ball valve 8-4 and system oil return line is connected, fast balancing device 10 provides the required pressure of the system; fast balancing device 10 pressure pipeline after balancing and fast switching device 9 is connected, fast switching device 9 solenoid reversing valve in the middle position, pressure oil stop state, keep locked; when the three-way pressure relief overflow valve 6 fails, fast switching device 9 solenoid reversing valve through the control box 12 control in the ‖ position, to the system fast oil supply; when the hydraulic control check valve 4 is locked, fast switching device 9 solenoid reversing valve through the control box 12 control in the × position, the system fast unloading, to prevent the effect of locking; fast switching device 9 outlet pipeline and high pressure ball valve 8-1 connection, high pressure ball valve 8-1 outlet and speed regulating valve 2 outlet pipeline connected in parallel with overflow valve 3; high pressure ball valve (8-1, 8-2, 8-3, 8-4) is designed for easy maintenance; pressure relay 11 is installed on the inlet pipeline of plunger cylinder 1, and the balance pipeline is monitored. The pressure relay 11 feeds back the pressure value to the control box 12 through monitoring, and the control box 12 controls the solenoid reversing valve in the fast switching device 9 by setting the pressure value, so that the system obtains the required control state.

[0028] The three-way pressure relief overflow valve of the utility model is arranged on the valve block, is used for realizing fast balancing, is small in space, saves pipeline, the outer surface of the valve block is subjected to corrosion prevention treatment due to the complex on-site environment, and the corrosion resistance is increased; the valve block of the fast balancing device is communicated with the unloading pipeline, the oil return pipeline and the oil inlet pipeline through high pressure ball valves, so that maintenance personnel can conveniently maintain and replace, and the structure is simple and convenient to disassemble; the valve block is independently installed, flange pipes are connected to the inlet and outlet pressure oil of the valve block, and the unloading and oil return adopt loose joint connection, so that maintenance and disassembly are convenient; pressure measuring points are respectively arranged on the connection passages of the valve block side surface and the inlet pressure flange pipe and the outlet pressure flange pipe, are connected with pressure gauges one and two respectively, and are convenient for an operator to observe the oil supply pressure, are simple and intuitive, and are convenient to operate.

Claims

1. A quick balancing device for a hydraulic system of a rolling mill, characterized in that, The valve block is provided with a balance valve fixedly installed on the top surface, an inlet pressure flange pipe and an outlet pressure flange pipe respectively arranged on the side surface of the valve block, a pressure oil inlet pressure measuring port and a pressure oil outlet pressure measuring port arranged on the front surface of the valve block, and an unloading port and an oil return port arranged on the rear surface of the valve block.

2. A quick balancing device for a hydraulic system of a rolling mill according to claim 1, characterized in that, The inlet pressure flange pipe is communicated with an oil inlet pipeline, the outlet pressure flange pipe is communicated with an oil inlet of a quick switching device through a pipeline, a working port of the quick switching device is used for being connected with a plunger cylinder through a pipeline, the unloading port is communicated with an unloading pipeline, the oil return port is connected with an oil return port of the quick switching device through a pipeline, and the oil return port is communicated with an oil return pipeline.

3. A quick balancing device for a hydraulic system of a rolling mill according to claim 1, characterized in that, The pressure oil inlet pressure measuring port is communicated with an oil inlet of the balance valve through an internal passage of the valve block, the pressure oil outlet pressure measuring port is communicated with an oil outlet of the balance valve through an internal passage of the valve block, the unloading port is communicated with an oil unloading port of the balance valve through an internal passage of the valve block, and the oil return port is communicated with an oil return port of the balance valve through an internal passage of the valve block.

4. A quick balancing device for a hydraulic system of a rolling mill according to claim 1, characterized in that, The pressure oil inlet pressure measuring port is communicated with an oil inlet of the balance valve through an internal passage of the valve block, the pressure oil outlet pressure measuring port is communicated with an oil outlet of the balance valve through an internal passage of the valve block, the unloading port is communicated with an oil unloading port of the balance valve through an internal passage of the valve block, and the oil return port is communicated with an oil return port of the balance valve through an internal passage of the valve block.

5. A quick balancing device for a hydraulic system of a rolling mill according to claim 1, characterized in that, The quick switching device is a three-position four-way electromagnetic reversing valve, and the balance valve is a three-way pressure reducing overflow valve. The unloading pipeline and the oil return pipeline are respectively communicated with an oil tank through corresponding high-pressure ball valves, and the oil inlet pipeline is used for being communicated with a high-pressure pump group.

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