CN216111494U - High-pressure roller mill hydraulic control system and high-pressure roller mill - Google Patents
High-pressure roller mill hydraulic control system and high-pressure roller mill Download PDFInfo
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- CN216111494U CN216111494U CN202121095095.1U CN202121095095U CN216111494U CN 216111494 U CN216111494 U CN 216111494U CN 202121095095 U CN202121095095 U CN 202121095095U CN 216111494 U CN216111494 U CN 216111494U
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Abstract
The utility model discloses a high-pressure roller mill hydraulic control system and a high-pressure roller mill, and belongs to the technical field of roller mill control systems. When the movable roller is pushed to advance, the right position of the first three-position four-way electromagnetic directional valve is electrified, hydraulic oil in the hydraulic station enters a rodless cavity of the double-acting hydraulic cylinder through a hydraulic pump through an oil supply pipeline T1, when the pressure reaches a preset value, the first three-position four-way electromagnetic directional valve is electrified and positioned in the middle position, the double-acting hydraulic cylinder is subjected to pressure maintaining work by virtue of an energy accumulator, and the hydraulic control one-way valve is in a one-way locking state; when the pressure is reduced to the preset lowest pressure, the hydraulic station restarts working to raise the pressure, and the process is repeated; when the movable roller is required to retreat, the left position of the three-position four-way electromagnetic directional valve I is electrified, hydraulic oil in the hydraulic station enters a rod cavity of the double-acting hydraulic cylinder through the hydraulic pump through an oil supply pipeline T1, the hydraulic control one-way valve is in an open state, the hydraulic oil in the rod-free cavity of the double-acting hydraulic cylinder flows back, and the retreating work of the movable roller is completed.
Description
Technical Field
The utility model relates to the technical field of roller mill control systems, in particular to a high-pressure roller mill hydraulic control system and a high-pressure roller mill.
Background
At present, a hydraulic system of a high-pressure roller mill comprises a hydraulic station, an integrated valve block and a hydraulic cylinder, wherein most of the valve blocks for controlling the moving roller to move forwards and backwards by the hydraulic system are cartridge valves and are connected with an energy accumulator on the integrated valve block, so that the integrated valve block has a large integral structure, cannot be arranged beside the hydraulic cylinder and only can be fixed on the side surface of a rack, and is connected with an oil inlet of the hydraulic cylinder through a long oil pipe, so that the energy accumulator is far away from the hydraulic cylinder. The energy accumulator is mainly used for absorbing pulsation and impact generated in the working process of the hydraulic cylinder and protecting the hydraulic cylinder and various components, the closer the position of the energy accumulator is to the hydraulic cylinder, the better the effect of absorbing the pulsation is, and if the distance is long, the effect is greatly reduced, so that the stability and the service life of a hydraulic system are greatly influenced.
At present, a main oil cylinder of a hydraulic system of most high-pressure roller mills is a single-action oil cylinder, only one oil inlet is arranged, the hydraulic system can only control the high-pressure roller mills to move forwards, and the roller mills move backwards passively by means of the counterforce generated when materials are extruded. When equipment is overhauled, because hydraulic system does not have the roller withdrawing function, can only rely on the manual work to promote the movable roll bearing frame and accomplish retreating of movable roll, it is inefficient, workman intensity of labour is high. If a group of hydraulic cylinders is separately added between the movable roller and the fixed roller to push the movable roller to move back, a hydraulic control valve and a control pipeline which are matched with the hydraulic cylinders need to be added. The cost is increased greatly, and the arrangement of a lubricating system and a cooling system of the high-pressure roller mill is greatly influenced by the added pipelines.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a hydraulic control system of a high-pressure roller mill and the high-pressure roller mill, which can solve the problem that a roller cannot be withdrawn actively, an energy accumulator cannot absorb pulsation generated by a hydraulic cylinder well, and the design structure can control not only the forward and backward movement of the movable roller, but also gate valve check and opening and closing speed of a feeding system.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a high pressure roller mill hydraulic control system, includes accumulator, double-acting hydraulic cylinder, is provided with the hydraulic pressure station of hydraulic pump and with the fuel feeding pipeline T1 of accumulator, double-acting hydraulic cylinder and hydraulic pressure station intercommunication install the stack valve subassembly on the fuel feeding pipeline T1, the stack valve subassembly is used for the movable roll to impel the switching between the operating mode and the operating mode of retreating.
Further preferably, the superposition valve assembly comprises a three-position four-way electromagnetic directional valve I, a hydraulic control one-way valve and an overflow valve, wherein the hydraulic control one-way valve is communicated with the rodless cavity of the double-acting hydraulic cylinder, and the overflow valve is provided with two parts which are respectively communicated with the rod cavity and the rodless cavity of the double-acting hydraulic cylinder.
Further preferably, the system also comprises a hydraulic pump, a high-pressure filter, an oil return filter, a cooler, a pilot overflow valve, a pressure sensor, a pressure gauge and an electromagnetic ball valve which are arranged on the oil supply pipeline T1.
Further preferably, still include feed flashboard control unit, feed flashboard control unit includes oil supply pipeline T2 and flashboard valve pneumatic cylinder, the flashboard valve pneumatic cylinder communicates with the hydraulic pressure station through oil supply pipeline T2, install the flashboard valve control assembly of the speed that opens and shuts and the opening and shutting of control flashboard on the oil supply pipeline T2.
Further preferably, the gate valve control assembly comprises a second three-position four-way electromagnetic directional valve, a double-hydraulic control one-way valve and a one-way throttle valve, the one-way throttle valve is provided with two parts which are respectively communicated with a rod cavity and a rodless cavity of the gate valve hydraulic cylinder and used for controlling the opening and closing speed of the gate valve hydraulic cylinder, and the two parts of the three-position four-way electromagnetic directional valve are used for controlling the opening and closing of the gate valve hydraulic cylinder.
Preferably, when the movable roller is pushed to move forward, the right position of the first three-position four-way electromagnetic directional valve is electrified, hydraulic oil in the hydraulic station enters a rodless cavity of the double-acting hydraulic cylinder through a hydraulic pump through an oil supply pipeline T1, when the pressure reaches a preset value, the first three-position four-way electromagnetic directional valve is electrified and positioned in a middle position, the double-acting hydraulic cylinder is pressurized by the energy accumulator to work, and the hydraulic control one-way valve is in a one-way locking state; when the pressure is reduced to the preset lowest pressure, the hydraulic station restarts working to raise the pressure, and the process is repeated; when the movable roller is required to retreat, the left position of the three-position four-way electromagnetic directional valve I is electrified, hydraulic oil in the hydraulic station enters a rod cavity of the double-acting hydraulic cylinder through the hydraulic pump through an oil supply pipeline T1, the hydraulic control one-way valve is in an open state, the hydraulic oil in the rod-free cavity of the double-acting hydraulic cylinder flows back, and the retreating work of the movable roller is completed.
A high pressure roller mill comprises a hydraulic control system as described above.
Compared with the prior art, the utility model has the following beneficial effects:
when the movable roller is pushed to move forward, the right position of the first three-position four-way electromagnetic reversing valve is electrified, hydraulic oil in the hydraulic station enters a rodless cavity of the double-acting hydraulic cylinder through a hydraulic pump through an oil supply pipeline T1, when the pressure reaches a preset value, the first three-position four-way electromagnetic reversing valve is electrified and positioned in the middle position, the double-acting hydraulic cylinder is subjected to pressure maintaining work by virtue of an energy accumulator, and the hydraulic control one-way valve is in a one-way locking state; when the pressure is reduced to the preset lowest pressure, the hydraulic station restarts working to raise the pressure, and the process is repeated; when the movable roller is required to retreat, the left position of the three-position four-way electromagnetic directional valve I is electrified, hydraulic oil in the hydraulic station enters a rod cavity of the double-acting hydraulic cylinder through the hydraulic pump through an oil supply pipeline T1, the hydraulic control one-way valve is in an open state, the hydraulic oil in the rod-free cavity of the double-acting hydraulic cylinder flows back, and the retreating work of the movable roller is completed.
The opening and closing of the gate of the feeding system are realized by a gate valve hydraulic cylinder, the opening and closing of the gate valve control component on the hydraulic station integrated block are controlled by the gate valve control component, and the gate valve control component consists of a three-position four-way electromagnetic directional valve II, a double-hydraulic control one-way valve and a one-way throttle valve. The gate valve hydraulic cylinder is communicated with the hydraulic station through an oil supply pipeline T2, the opening and closing of the gate can be realized by reversing the three-position four-way electromagnetic directional valve II, and the opening and closing speed of the two one-way throttle valves can be controlled by adjusting the opening sizes of the two one-way throttle valves.
Drawings
FIG. 1 is a schematic diagram of a control system according to the present invention;
fig. 2 is a side view of the overall structure of the present invention.
In the figure: 1. the hydraulic system comprises an oil tank, 2, an oil absorption filter, 3, a hydraulic pump, 4, a pilot operated overflow valve, 5, a cooler, 6, a high-pressure filter, 7, a pressure sensor, 8, a pressure gauge, 9, an oil return filter, 10, a hydraulic control check valve, 11, a superposition type overflow valve, 12, a three-position four-way electromagnetic directional valve I, 13, a one-way throttle valve, 14, a double hydraulic control check valve, 15, an electromagnetic ball valve, 16, a three-position four-way electromagnetic directional valve II, 17, an energy accumulator, 18, a double-acting hydraulic cylinder, 19, a gate valve hydraulic cylinder, 20 and a hydraulic station.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
as shown in fig. 1 to 2, a hydraulic control system of a high-pressure roller mill comprises an accumulator 17, a double-acting hydraulic cylinder 18, a hydraulic station 20 (mainly comprising an oil tank 1, an oil suction filter 2 and a valve table) provided with a hydraulic pump 3 (a gear pump), and an oil supply pipeline T1 for communicating the accumulator 17, the double-acting hydraulic cylinder 18 and the hydraulic station 20, wherein a superposition valve assembly is installed on the oil supply pipeline T1 for communicating the double-acting hydraulic cylinder 18 with the hydraulic station 20, and the superposition valve assembly is used for switching between a movable roller advancing working condition and a movable roller retreating working condition.
In a further preferable scheme, the superposition valve assembly comprises a three-position four-way electromagnetic directional valve I12, a hydraulic control one-way valve 10 and a superposition type overflow valve 11, wherein the hydraulic control one-way valve 10 is communicated with a rodless cavity of the double-acting hydraulic cylinder 18, and the superposition type overflow valve 11 is provided with two rod cavities and two rodless cavities which are respectively communicated with the double-acting hydraulic cylinder 18.
In the implementation of this embodiment: when the movable roller is pushed to advance, the right position of the three-position four-way electromagnetic directional valve I12 is electrified, hydraulic oil in the hydraulic station 20 enters a rodless cavity of the double-acting hydraulic cylinder 18 through the hydraulic pump 3 through an oil supply pipeline T1, when the pressure reaches a preset value, the three-position four-way electromagnetic directional valve I12 is electrified and is positioned in the middle position, the double-acting hydraulic cylinder 18 is in pressure maintaining work by virtue of the energy accumulator 17, and the hydraulic control one-way valve 10 is in a one-way locking state; when the pressure drops to the preset lowest pressure, the hydraulic station 20 restarts working to raise the pressure, and the process is repeated; when the movable roller is required to retreat, the left position of the three-position four-way electromagnetic directional valve I12 is electrified, hydraulic oil in the hydraulic station 20 enters a rod cavity of the double-acting hydraulic cylinder 18 through the hydraulic pump 3 through an oil supply pipeline T1, the hydraulic control one-way valve 10 is in an open state, the hydraulic oil in the rodless cavity of the double-acting hydraulic cylinder 18 flows back, and the retreating work of the movable roller is completed.
When the hydraulic system works, four double-acting hydraulic cylinders 18 (one group in pairs) are respectively communicated with two energy accumulators 17 through large-pipe-diameter pipelines, so that the pressure between the two energy accumulators is always the same, and the dynamic characteristics of the double-acting hydraulic cylinders 18 are sensitive. The accumulator 17 and the double-acting hydraulic cylinder 18 are connected with a valve table on the hydraulic station 20 and are communicated with an oil supply pipeline T1 through a superposed overflow valve 11, a one-way valve 10 and a three-position four-way electromagnetic directional valve I12. An outlet of an oil suction pipe of the hydraulic pump 3 (gear pump) above the hydraulic station 20 is connected with an inlet of the high-pressure filter 6, and oil filtered by the high-pressure filter 6 is directly connected to an oil inlet pipeline T1 through a valve table.
Example 2:
as shown in fig. 1 to 2, the hydraulic station 20 is integrated with a high-pressure filter 6, an oil return filter 9, a cooler 5, a pilot-operated relief valve 4, a pressure sensor 7, a pressure gauge 8, and an electromagnetic ball valve 15, which are installed on an oil supply line T1. Normally, the pressure sensor 7 is responsible for displaying the hydraulic pressure and transmitting a signal to the control system. In addition, the hydraulic station 20 is further provided with a liquid level sensor (not released in the figure), a temperature sensor (not released in the figure), a liquid level meter (not released in the figure), a heater (not released in the figure), an oil return filter 9 and corresponding components of the motor, so that the working state of the hydraulic system is monitored constantly, corresponding adjustment is made timely, and the stability of the operation of the hydraulic system is greatly improved.
Example 3:
as shown in fig. 1 to 2, on the basis of embodiment 2, it is further preferable that the feed gate control unit further includes a gate valve control unit, the gate valve control unit includes an oil supply line T2 and a gate valve hydraulic cylinder 19, the gate valve hydraulic cylinder 19 communicates with the hydraulic station 20 through an oil supply line T2, and a gate valve control component for controlling the opening and closing speed of the gate valve is installed on the oil supply line T2.
The gate valve control assembly comprises a second three-position four-way electromagnetic directional valve 16, a double-hydraulic-control one-way valve 14 and a one-way throttle valve 13, the one-way throttle valve 13 is provided with two rod cavities and a rodless cavity which are communicated with the gate valve hydraulic cylinder 19 respectively and used for controlling the opening and closing speed of the gate valve hydraulic cylinder 19, and the second three-position four-way electromagnetic directional valve 16 is used for controlling the opening and closing of the gate valve hydraulic cylinder 19.
The practical working condition of the gate valve is as follows: when the gate valve needs to be closed, the right position of the second three-position four-way electromagnetic directional valve 16 is electrified, hydraulic oil in the oil tank 1 enters the rodless cavity of the gate valve hydraulic cylinder 19 through the oil supply pipeline T2 to push the piston to move forward, the gate valve starts to be closed, when the gate valve touches the limit switch, the electric control system sends a signal, and the second three-position four-way electromagnetic directional valve 16 is in the neutral position when the power is lost. At this time, the double hydraulic control one-way valve 14 is in a two-way locking state, and the closing state of the gate valve is kept; when the gate valve needs to be opened, the left position of the second three-position four-way electromagnetic directional valve 16 is electrified, hydraulic oil in the oil tank 1 enters the rod cavity of the gate valve hydraulic cylinder 19 through the oil supply pipeline T2, the piston is pushed to retreat, the gate valve starts to be opened, when the gate valve touches the limit switch, the electric control system sends a signal, and the second three-position four-way electromagnetic directional valve 16 is in the neutral position when power is lost. At this time, the double hydraulic control one-way valve 14 is in a two-way locking state, and the opening state of the gate valve is kept.
A high pressure roller mill comprises a hydraulic control system as described above.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. The technical solution and the inventive concept thereof according to the present invention should be covered by the protection scope of the present invention by equivalent substitution or change.
Claims (7)
1. The hydraulic control system of the high-pressure roller mill comprises an energy accumulator (17), a double-acting hydraulic cylinder (18), a hydraulic station (20) provided with a hydraulic pump (3) and an oil supply pipeline T1 communicating the energy accumulator (17), the double-acting hydraulic cylinder (18) and the hydraulic station (20), and is characterized in that the double-acting hydraulic cylinder (18) is communicated with the hydraulic station (20) and an overlapping valve assembly is installed on the oil supply pipeline T1 and used for switching between a propelling working condition and a retreating working condition of a movable roller.
2. The hydraulic control system of the high-pressure roller mill according to claim 1, characterized in that the superposition valve assembly comprises a three-position four-way electromagnetic directional valve I (12), a hydraulic control one-way valve (10) and an overflow valve (11), wherein the hydraulic control one-way valve (10) is communicated with the rodless cavity of the double-acting hydraulic cylinder (18), and the overflow valve (11) is provided with two rod cavities and two rodless cavities which are respectively communicated with the double-acting hydraulic cylinder (18).
3. The hydraulic control system of the high-pressure roller mill according to claim 2, characterized by further comprising a hydraulic pump (3), a high-pressure filter (6), an oil return filter (9), a cooler (5), a pilot-operated relief valve (4), a pressure sensor (7), a pressure gauge (8) and an electromagnetic ball valve (15) which are installed on an oil supply pipeline T1.
4. The hydraulic control system for the high-pressure roller mill according to claim 3, characterized by further comprising a feed gate control unit, wherein the feed gate control unit comprises an oil supply pipeline T2 and a gate valve hydraulic cylinder (19), the gate valve hydraulic cylinder (19) is communicated with the hydraulic station (20) through an oil supply pipeline T2, and a gate valve control component for controlling the opening and closing speed of the gate is installed on the oil supply pipeline T2.
5. The hydraulic control system of the high-pressure roller mill according to claim 4, wherein the gate valve control assembly comprises a second three-position four-way electromagnetic directional valve (16), a double-hydraulic-control one-way valve (14) and a one-way throttle valve (13), the one-way throttle valve (13) is provided with two rod cavities and two rodless cavities which are respectively communicated with the gate valve hydraulic cylinder (19) for controlling the opening and closing speed of the gate valve hydraulic cylinder (19), and the second three-position four-way electromagnetic directional valve (16) is used for controlling the opening and closing of the gate valve hydraulic cylinder (19).
6. The hydraulic control system of the high-pressure roller mill is characterized in that when the movable roller is pushed to advance, the right position of the three-position four-way electromagnetic directional valve I (12) is electrified, hydraulic oil in the hydraulic station (20) enters a rodless cavity of the double-acting hydraulic cylinder (18) through an oil supply pipeline T1 through the hydraulic pump (3), when the pressure reaches a preset value, the three-position four-way electromagnetic directional valve I (12) is electrified in a middle position, the double-acting hydraulic cylinder (18) is subjected to pressure maintaining work by the energy accumulator (17), and the hydraulic control one-way valve (10) is in a one-way locking state; when the pressure is reduced to the preset lowest pressure, the hydraulic station (20) restarts working to raise the pressure, and the process is repeated; when the movable roller is required to retreat from the roller, the left position of the three-position four-way electromagnetic directional valve I (12) is electrified, hydraulic oil in the hydraulic station (20) passes through a rod cavity of the hydraulic pump (3) entering the double-acting hydraulic cylinder (18) through an oil supply pipeline T1, the hydraulic control one-way valve (10) is in an open state, the hydraulic oil in the rodless cavity of the double-acting hydraulic cylinder (18) flows back, and the retreating work of the movable roller is completed.
7. A high pressure roller mill characterized by comprising the hydraulic control system according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121095095.1U CN216111494U (en) | 2021-05-21 | 2021-05-21 | High-pressure roller mill hydraulic control system and high-pressure roller mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121095095.1U CN216111494U (en) | 2021-05-21 | 2021-05-21 | High-pressure roller mill hydraulic control system and high-pressure roller mill |
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| CN216111494U true CN216111494U (en) | 2022-03-22 |
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| CN202121095095.1U Active CN216111494U (en) | 2021-05-21 | 2021-05-21 | High-pressure roller mill hydraulic control system and high-pressure roller mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932122A (en) * | 2022-05-31 | 2022-08-23 | 中国二十二冶集团有限公司 | Device for flushing hydraulic system and thin oil system of vertical mill and flushing method |
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2021
- 2021-05-21 CN CN202121095095.1U patent/CN216111494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114932122A (en) * | 2022-05-31 | 2022-08-23 | 中国二十二冶集团有限公司 | Device for flushing hydraulic system and thin oil system of vertical mill and flushing method |
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