CN209781360U - Hydraulic control system of stepping heating furnace - Google Patents
Hydraulic control system of stepping heating furnace Download PDFInfo
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- CN209781360U CN209781360U CN201822050791.5U CN201822050791U CN209781360U CN 209781360 U CN209781360 U CN 209781360U CN 201822050791 U CN201822050791 U CN 201822050791U CN 209781360 U CN209781360 U CN 209781360U
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Abstract
The utility model provides a hydraulic control system of a stepping heating furnace, which comprises a main oil pipe, an oil tank, a motor, an oil pump, a first electric control proportional reversing valve group, a lifting oil cylinder and a gravity oil return tank; an oil inlet of the main oil pipe is communicated with an oil outlet of the oil tank; an oil outlet of the main oil pipe is communicated with an oil port P of the first electric control proportional reversing valve group; the oil pump is connected to the main oil pipe, and an oil inlet of the oil pump is communicated with an oil outlet of the oil tank; the motor is connected with the oil pump; an oil port T of the first electric control proportional reversing valve group is communicated with one end of a second oil return pipe, and the other end of the second oil return pipe is communicated with an oil tank; the lower part of the lifting oil cylinder is communicated with one end of an oil cylinder pipe, and the other end of the oil cylinder pipe is communicated with an oil port A of the first electric control proportional reversing valve group; the upper part of the lifting oil cylinder is communicated with the gravity oil return tank; through adopting above technical scheme, solved control system motor problem of continuous work still when unloading, be of value to the energy saving, and reducible pipeline loss improves system reliability.
Description
Technical Field
The utility model relates to a heating furnace hydraulic system field, concretely relates to step-by-step heating furnace hydraulic control system.
Background
The stepping heating furnace has the advantages of short heating time, uniform billet heating quality and high automation degree, and has advantages in the aspects of environmental protection, energy consumption and the like, so the stepping heating furnace is widely applied to billet heating process devices in the metallurgical industry. No matter in the prior art step heating furnace hydraulic control system, the motor is in a running state when oil is injected or returned, and the energy can not be saved. Meanwhile, the motor is in a working state for a long time, the aging loss of the motor is easy to accelerate, the movement of hydraulic oil in a pipeline in a lifting and back-and-forth mode is increased, and the pipe aligning loss is increased.
Based on the technical problems of the hydraulic control system of the stepping heating furnace, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the weak point that exists in the above-mentioned technique, provide a step heating furnace hydraulic control system, aim at solving the problem that control system motor still lasts the work when the oil return.
The utility model provides a hydraulic control system of a stepping heating furnace, which comprises a main oil pipe (a 1), an oil tank (1), a motor (3), an oil pump (4), a first electric control proportional reversing valve group (9), a lifting oil cylinder (10) and a gravity oil return tank (11); an oil inlet of the main oil pipe (a 1) is communicated with an oil outlet of the oil tank (1); an oil outlet of the main oil pipe (a 1) is communicated with an oil port P of the first electric control proportional reversing valve group (9); the oil pump (4) is arranged on the main oil pipe (a 1); the motor (3) is connected with the oil pump (4); an oil port T of the first electric control proportional reversing valve group (9) is communicated with the oil tank (1) through a second oil return pipe (a 4); the lifting oil cylinder (10) is communicated with an oil port A of the first electric control proportional reversing valve group (9) through an oil cylinder pipe (c 1); the lifting oil cylinder (10) is communicated with the gravity oil return tank (11), and the gravity oil return tank (11) is used for storing hydraulic oil extruded from the upper part of the lifting oil cylinder (10) and pushing out the hydraulic oil below the lifting oil cylinder (10) by means of gravity during oil return.
Further, the oil pipe assembly further comprises a secondary oil pipe (a 2), a second electronic control proportional reversing valve group (13) and a translation oil cylinder (14); an oil inlet of the secondary oil pipe (a 2) is communicated with the main oil pipe (a 1); an oil port P of the second electric control proportional reversing valve group (13) is communicated with an oil outlet of the secondary oil pipe (a 2); an oil port T of the second electric control proportional reversing valve group (13) is communicated with the oil tank (1) through a third oil return pipe (a 5); an oil inlet on the left side of the translation oil cylinder (14) is communicated with an oil port A of the second electric control proportional reversing valve group (13); an oil outlet at the right side of the translation oil cylinder (14) is communicated with an oil port B of the second electric control proportional reversing valve group (13).
furthermore, the secondary oil pipe (a 2) is also connected with a pressure reducing valve (12), and the pressure regulating range of the pressure reducing valve (12) is 0.7 ~ 7 MPa.
Furthermore, the main oil pipe (a 1) is also connected with a bag type energy accumulator (7); the bag type energy accumulator (7) is respectively communicated with an oil outlet of the oil pump (4) and an oil port P of the first electric control proportional reversing valve group (9) through a main oil pipe (a 1); the bag type energy accumulator (7) is located between an oil outlet of the oil pump (4) and an oil port P of the first electric control proportional reversing valve group (9), and the bag type energy accumulator (7) is used for storing hydraulic oil in a gravitational potential energy mode.
furthermore, the rated pressure of the bag type energy accumulator (7) is 20MPa, and the volume of the bag type energy accumulator (7) is 40 ~ 50L.
Further, the device also comprises an unloading overflow valve (6); an oil outlet of the unloading overflow valve (6) is communicated with the oil tank (1) through a first oil return pipe (a 3); an oil inlet of the unloading overflow valve (6) is communicated with the main oil pipe (a 1) and is positioned between an oil outlet of the oil pump (4) and the bag-type energy accumulator (7), and the unloading overflow valve (6) is used for controlling unloading or loading of the oil pump (4).
Further, the main oil pipe (a 1) is also connected with an oil absorption filter (2); an oil inlet of the oil absorption filter (2) is communicated with an oil outlet of the oil tank (1); an oil outlet of the oil absorption filter (2) is communicated with an oil inlet of the oil pump (4), and the oil absorption filter (2) is used for removing mechanical impurities in the hydraulic oil.
Further, an oil filter (5) is connected to the main oil pipe (a 1); an oil inlet of the oil filter (5) is communicated with an oil outlet of the oil pump (4); an oil outlet of the oil filter (5) is respectively communicated with oil inlets of the bag type energy accumulator (7) and the unloading overflow valve (6) through a main oil pipe (a 1), and the oil filter (5) is used for removing pollutants in hydraulic oil.
Further, a pressure gauge (8) is connected to the main oil pipe (a 1); the pressure gauge (8) is positioned between the bag type energy accumulator (7) and the oil port P of the first electric control proportional reversing valve group (9).
Correspondingly, the utility model also provides a hydraulic control method of the walking beam furnace, which is applied to the hydraulic control system of the walking beam furnace; further comprising the steps of:
S1: when oil is filled, the motor (3) runs, and hydraulic oil is pumped out from an oil outlet of the oil tank (1) through the oil pump (4) and enters the main pipeline (a 1); an oil port A of the first electronic control proportional reversing valve group (9) is communicated with an oil port P, hydraulic oil enters the lower part of the lifting oil cylinder (10) from the oil port A of the first electronic control proportional reversing valve group (9) through an oil cylinder pipe (c 1), and pushes a piston to move upwards, so that the hydraulic oil above the lifting oil cylinder (10) is pushed into the gravity oil return box (11);
S2: when oil is discharged, the motor (3) stops, hydraulic oil in the gravity oil return tank (11) pushes a piston in the lifting oil cylinder (10) downwards by means of gravity, and the hydraulic oil below the lifting oil cylinder (10) is pushed out to enter an oil cylinder pipe (c 1); an oil port B of the first electric control proportional reversing valve group (9) is communicated with an oil port P, and hydraulic oil flows back to the oil tank (1) through a second oil return pipe (a 4).
By adopting the technical scheme, the hydraulic control system has better performance in the aspects of stability, control precision, energy conservation, reliability and the like; the gravitational potential energy is recycled to reduce the load on the motor, reduce the pipeline loss, achieve the effects of saving energy and reducing cost and improve the production efficiency of the heating furnace; the system is easy to realize, has low cost and can meet the requirements of energy conservation and reliability improvement of the hydraulic system.
drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic view of a hydraulic control system of a walking beam furnace according to the present invention;
Fig. 2 is a flow chart of the hydraulic control method of the stepping heating furnace of the present invention.
In the figure: 1. an oil tank; 2. an oil absorption filter; 3. a motor; 4. an oil pump; 5. an oil filter; 6. an unloading overflow valve; 7. a bladder accumulator; 8. a pressure gauge; 9. a first electrically controlled proportional reversing valve bank; 10. a lift cylinder; 11. a gravity oil return tank; 12. a pressure reducing valve; 13. a second electrically controlled proportional reversing valve bank; 14. a translation oil cylinder; a1, main oil pipe; a2, secondary tubing; a3, a first oil return pipe; a4, a second oil return pipe, a5, a third oil return pipe, c1 and a cylinder pipe.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the utility model provides a hydraulic control system for a stepping heating furnace, which comprises a main oil pipe (a 1), an oil tank (1), a motor (3), an oil pump (4), a first electric control proportional reversing valve set (9), a lifting oil cylinder (10) and a gravity oil return tank (11); an oil inlet of the main oil pipe (a 1) is communicated with an oil outlet of the oil tank (1); an oil outlet of the main oil pipe (a 1) is communicated with an oil port P of the first electric control proportional reversing valve group (9); the oil pump (4) is arranged on the main oil pipe (a 1); the motor (3) is connected with the oil pump (4); an oil port T of the first electric control proportional reversing valve group (9) is communicated with the oil tank (1) through a second oil return pipe (a 4); the lifting oil cylinder (10) is communicated with an oil port A of the first electric control proportional reversing valve group (9) through an oil cylinder pipe (c 1); the lifting oil cylinder (10) is communicated with the gravity oil return tank (11), and the gravity oil return tank (11) is used for storing hydraulic oil extruded above the lifting oil cylinder (10) and pushing out the hydraulic oil below the lifting oil cylinder (10) during oil return by means of gravity; specifically, when oil is injected, an oil port A of a first electric control proportional reversing valve group (9) is communicated with an oil port P to push hydraulic oil above a lifting oil cylinder (10) to enter a gravity oil return tank (11); during oil return, the piston is pushed to move downwards by the gravity of the hydraulic oil in the gravity oil return tank (11), and the hydraulic oil below is pushed out of the lifting oil cylinder (10) and enters the oil cylinder pipe (c 1); an oil port B of the first electric control proportional reversing valve group (9) is communicated with an oil port P, and hydraulic oil is discharged through a communicated second oil return pipe (a 4); through the scheme, the resource utilization rate of the system is improved, the energy consumption is reduced, the loss of the motor and the pipeline is reduced, and the reliability of the system is improved.
Preferably, in combination with the above scheme, as shown in fig. 1 and 2, in this embodiment, the hydraulic control system further includes a secondary oil pipe (a 2), a second electrically controlled proportional directional valve set (13), and a translation cylinder (14); an oil inlet of the secondary oil pipe (a 2) is communicated with the main oil pipe (a 1); an oil port P of the second electric control proportional reversing valve group (13) is communicated with an oil outlet of the secondary oil pipe (a 2); an oil port T of the second electric control proportional reversing valve group (13) is communicated with an oil tank through a third oil return pipe (a 5); an oil inlet on the left side of the translation oil cylinder (14) is communicated with an oil port A of the second electric control proportional reversing valve group (13); an oil outlet at the right side of the translation oil cylinder (14) is communicated with an oil port B of a second electric control proportional reversing valve group (13); specifically, when oil is injected, an oil port A of the second electric control proportional reversing valve group (13) is communicated with an oil port P, and hydraulic oil enters the left side of the translation oil cylinder (14); during oil return, an oil port B of the second electronic control proportional reversing valve group (13) is communicated with an oil port P, hydraulic oil is injected into the right side of the translation oil cylinder (14) to push the piston to move in the forward direction, the hydraulic oil on the left side of the translation oil cylinder (14) is pushed out, and the hydraulic oil flows back to the oil tank through a third oil return pipe (a 5) communicated with an oil port T of the first electronic control proportional reversing valve group (13).
preferably, with the combination of the above solutions, as shown in fig. 1 and 2, in this embodiment, the secondary oil pipe (a 2) is further connected with a pressure reducing valve (12), the pressure regulating range of the pressure reducing valve (12) is 0.7 ~ 7MPa, and specifically, the pressure reducing valve (12) is used for regulating the system pressure.
preferably, with the combination of the above schemes, as shown in fig. 1 and 2, in this embodiment, a main oil pipe (a 1) is further connected with a bag-type energy accumulator (7), the bag-type energy accumulator (7) is respectively communicated with an oil outlet of an oil pump (4) and an oil port P of a first electronic control proportional reversing valve group (9) through a main oil pipe (a 1), the bag-type energy accumulator (7) is located between the oil outlet of the oil pump (4) and the oil port P of the first electronic control proportional reversing valve group (9), the bag-type energy accumulator (7) is used for storing hydraulic oil in the form of gravitational potential energy, specifically, since the instantaneous power required during the operation of a lifting oil cylinder (10) is larger, but the operation cycle time interval is 1: 3, for example, only 15 seconds are required for operation within one minute, the high-power motor (3) is required to operate intermittently, since the high-power motor (3) is expensive, and most of the motor (3) is in idle operation, the energy is wasted, the bag-type energy accumulator (7) can be put into the oil injection oil tank (3) to operate when the oil injection is not required, the bag-type energy accumulator (7), and the pressure of the bag-type energy accumulator (7) is reduced by the specific requirement of the bag-type energy accumulator (20-40 MPa.
Preferably, in combination with the above scheme, as shown in fig. 1 and 2, in the present embodiment, an unloading overflow valve (6) is further included; an oil outlet of the unloading overflow valve (6) is communicated with the oil tank (1) through a first oil return pipe (a 3); an oil inlet of the unloading overflow valve (6) is communicated with the main oil pipe (a 1) and is positioned between an oil outlet of the oil pump (4) and the bag-type energy accumulator (7), and the unloading overflow valve (6) is used for controlling unloading or loading of the oil pump (4); specifically, when the oil cylinder retreats, the system flow exceeds the oil supply flow, and in order to prevent the return oil pressure of the system from rising, an unloading overflow valve (6) is adopted to unload a part of oil to ensure that the system pressure is stable.
Preferably, in combination with the above solutions, as shown in fig. 1 and 2, in this embodiment, the main oil pipe (a 1) is further connected with an oil absorption filter (2); an oil inlet of the oil absorption filter (2) is communicated with an oil outlet of the oil tank (1); an oil outlet of the oil absorption filter (2) is communicated with an oil inlet of the oil pump (4), and the oil absorption filter (2) is used for removing mechanical impurities in hydraulic oil; specifically, the oil absorption filter (2) can avoid the phenomenon that mechanical impurities are absorbed into the oil pump (4) to cause the excessive loss of the oil pump (4).
Preferably, in combination with the above solutions, as shown in fig. 1 and 2, in this embodiment, the main oil pipe (a 1) is further connected with an oil filter (5); an oil inlet of the oil filter (5) is communicated with an oil outlet of the oil pump (4); an oil outlet of the oil filter (5) is respectively communicated with oil inlets of the bag type energy accumulator (7) and the unloading overflow valve (6) through a main oil pipe (a 1), and the oil filter (5) is used for removing pollutants in hydraulic oil; specifically, the oil filter (5) can keep the cleanliness of oil liquid and ensure the reliability of the work of hydraulic elements.
Preferably, in combination with the above solutions, as shown in fig. 1 and 2, in this embodiment, the main oil pipe (a 1) is further connected with a pressure gauge (8); the pressure gauge (8) is positioned between the bag type energy accumulator (7) and an oil port P of the first electric control proportional reversing valve group (9); specifically, manometer (8) can be used for looking over system current pressure in real time, plays the early warning effect.
Preferably, in combination with the above scheme, as shown in fig. 1 and 2, in this embodiment, the system further includes an electric control system PLC for controlling the hydraulic system, so that the system has high automation degree, strong reliability, fast response speed, high precision, and stable system working performance; meanwhile, the pressure, the temperature and the liquid level can be automatically controlled by combining a temperature sensor, a pressure sensor and the like, so that the hydraulic system can reliably operate for a long time.
Correspondingly, in combination with the above scheme, as shown in fig. 1 and 2, the present invention further provides a hydraulic control method for a walking beam furnace, which is applied to the hydraulic control system for a walking beam furnace; further comprising the steps of:
S1: when oil is filled, the motor (3) runs, and hydraulic oil is pumped out from an oil outlet of the oil tank (1) through the oil pump (4) and enters the main pipeline (a 1); an oil port A of the first electronic control proportional reversing valve group (9) is communicated with an oil port P, hydraulic oil enters the lower part of the lifting oil cylinder (10) from the oil port A of the first electronic control proportional reversing valve group (9) through an oil cylinder pipe (c 1), and pushes a piston to move upwards, so that the hydraulic oil above the lifting oil cylinder (10) is pushed into the gravity oil return box (11);
s2: when oil is discharged, the motor (3) stops, hydraulic oil in the gravity oil return tank (11) pushes a piston in the lifting oil cylinder (10) downwards by means of gravity, and the hydraulic oil below the lifting oil cylinder (10) is pushed out to enter an oil cylinder pipe (c 1); an oil port B of the first electric control proportional reversing valve group (9) is communicated with an oil port P, and hydraulic oil flows back to the oil tank (1) through a second oil return pipe (a 4).
By adopting the technical scheme, the hydraulic control system has better performance in the aspects of stability, control precision, energy conservation, reliability and the like; the gravitational potential energy is recycled to reduce the load on the motor, reduce the pipeline loss, achieve the effects of saving energy and reducing cost and improve the production efficiency of the heating furnace; the system is easy to realize, has low cost and can meet the requirements of energy conservation and reliability improvement of the hydraulic system.
the foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. The technical solutions of the present invention can be used by anyone skilled in the art to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the present invention are all within the protection scope of the present invention.
Claims (9)
1. a hydraulic control system of a stepping heating furnace is characterized by comprising a main oil pipe (a 1), an oil tank (1), a motor (3), an oil pump (4), a first electric control proportional reversing valve group (9), a lifting oil cylinder (10) and a gravity oil return tank (11); an oil inlet of the main oil pipe (a 1) is communicated with an oil outlet of the oil tank (1); an oil outlet of the main oil pipe (a 1) is communicated with an oil port P of the first electric control proportional reversing valve group (9); the oil pump (4) is arranged on the main oil pipe (a 1); the motor (3) is connected with the oil pump (4); an oil port T of the first electric control proportional reversing valve group (9) is communicated with the oil tank (1) through a second oil return pipe (a 4); the lifting oil cylinder (10) is communicated with an oil port A of the first electric control proportional reversing valve group (9) through an oil cylinder pipe (c 1); lift cylinder (10) with gravity returns oil tank (11) intercommunication, gravity returns oil tank (11) and is used for storing the hydraulic oil that lift cylinder (10) top extruded to rely on gravity will when the oil return lift cylinder (10) below hydraulic oil is released.
2. The hydraulic control system of the stepping heating furnace according to claim 1, further comprising a secondary oil pipe (a 2), a second electrically-controlled proportional directional valve set (13) and a translation cylinder (14); the oil inlet of the secondary oil pipe (a 2) is communicated with the main oil pipe (a 1); an oil port P of the second electric control proportional reversing valve group (13) is communicated with an oil outlet of the secondary oil pipe (a 2); an oil port T of the second electric control proportional reversing valve group (13) is communicated with the oil tank (1) through a third oil return pipe (a 5); an oil inlet on the left side of the translation oil cylinder (14) is communicated with an oil port A of the second electric control proportional reversing valve group (13); an oil outlet on the right side of the translation oil cylinder (14) is communicated with an oil port B of the second electric control proportional reversing valve group (13).
3. the hydraulic control system of the stepping heating furnace according to claim 2, wherein the secondary oil pipe (a 2) is further connected with a pressure reducing valve (12), and the pressure regulating range of the pressure reducing valve (12) is 0.7 ~ 7 MPa.
4. The hydraulic control system of the stepping heating furnace according to claim 1, wherein a bag type accumulator (7) is further connected to the main oil pipe (a 1); the bag type energy accumulator (7) is respectively communicated with an oil outlet of the oil pump (4) and an oil port P of the first electric control proportional reversing valve group (9) through the main oil pipe (a 1); the bag type energy accumulator (7) is located between an oil outlet of the oil pump (4) and an oil port P of the first electric control proportional reversing valve group (9), and the bag type energy accumulator (7) is used for storing hydraulic oil in a gravitational potential energy mode.
5. the hydraulic control system of the stepping heating furnace according to claim 4, wherein the rated pressure of the bag type energy accumulator (7) is 20MPa, and the volume of the bag type energy accumulator (7) is 40 ~ 50L.
6. A hydraulic control system of a walking beam furnace according to any one of claims 4 to 5, characterized by further comprising an unloading overflow valve (6); an oil outlet of the unloading overflow valve (6) is communicated with the oil tank (1) through a first oil return pipe (a 3); an oil inlet of the unloading overflow valve (6) is communicated with the main oil pipe (a 1) and is positioned between an oil outlet of the oil pump (4) and the bag-type energy accumulator (7), and the unloading overflow valve (6) is used for controlling unloading or loading of the oil pump (4).
7. The hydraulic control system of the walking beam furnace as claimed in claim 6, wherein the main oil pipe (a 1) is further connected with an oil suction filter (2); an oil inlet of the oil suction filter (2) is communicated with an oil outlet of the oil tank (1); the oil outlet of the oil absorption filter (2) is communicated with the oil inlet of the oil pump (4), and the oil absorption filter (2) is used for removing mechanical impurities in hydraulic oil.
8. The hydraulic control system of the walking beam furnace according to claim 7, wherein an oil filter (5) is further connected to the main oil pipe (a 1); an oil inlet of the oil filter (5) is communicated with an oil outlet of the oil pump (4); an oil outlet of the oil filter (5) is respectively communicated with oil inlets of the bag type energy accumulator (7) and the unloading overflow valve (6) through the main oil pipe (a 1), and the oil filter (5) is used for removing pollutants in hydraulic oil.
9. The hydraulic control system of the stepping heating furnace according to claim 8, wherein a pressure gauge (8) is further connected to the main oil pipe (a 1); the pressure gauge (8) is positioned between the bag type energy accumulator (7) and an oil port P of the first electric control proportional reversing valve group (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822050791.5U CN209781360U (en) | 2018-12-07 | 2018-12-07 | Hydraulic control system of stepping heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822050791.5U CN209781360U (en) | 2018-12-07 | 2018-12-07 | Hydraulic control system of stepping heating furnace |
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| Publication Number | Publication Date |
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| CN209781360U true CN209781360U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822050791.5U Active CN209781360U (en) | 2018-12-07 | 2018-12-07 | Hydraulic control system of stepping heating furnace |
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| CN (1) | CN209781360U (en) |
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2018
- 2018-12-07 CN CN201822050791.5U patent/CN209781360U/en active Active
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