CN109505811B - Energy-saving RH hydraulic jacking proportional valve control system - Google Patents
Energy-saving RH hydraulic jacking proportional valve control system Download PDFInfo
- Publication number
- CN109505811B CN109505811B CN201811553623.6A CN201811553623A CN109505811B CN 109505811 B CN109505811 B CN 109505811B CN 201811553623 A CN201811553623 A CN 201811553623A CN 109505811 B CN109505811 B CN 109505811B
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- valve
- plug
- pump
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 22
- 239000003921 oil Substances 0.000 claims description 73
- 239000007788 liquid Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 4
- 238000007872 degassing Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/003—Systems with load-holding valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/865—Prevention of failures
Abstract
The invention provides an energy-saving RH hydraulic jacking proportional valve control system, which comprises two hydraulic cylinders, a hydraulic control mechanism, a hydraulic pump source group, a hydraulic oil tank mechanism, a high-low pressure switching mechanism and a pilot control pump group; the hydraulic pump source group comprises at least two groups of hydraulic main pumps, the inlet of each hydraulic main pump is connected with the hydraulic oil tank mechanism, and the outlet of each hydraulic main pump is connected with the first high-pressure filter and the first overflow valve; the hydraulic main pump is connected with a high-low pressure switching mechanism; the high-low pressure switching mechanism comprises a high-pressure pipeline and a low-pressure pipeline; the pilot control pump set comprises at least one group of pilot pumps, the inlet of each pilot pump is connected with the hydraulic oil tank mechanism, and the outlet of each pilot pump is connected with the high-pressure filter II and the overflow valve II; the pilot control pump group is connected with the hydraulic pump source group and the hydraulic control mechanism. The hydraulic pump source group is in a low-pressure state when the hydraulic cylinder is in standby and descending, so that the energy consumption is effectively reduced, the heating of a hydraulic system is reduced, and the abrasion of a main pump is reduced.
Description
Technical Field
The invention belongs to the technical field of RH vacuum refining hydraulic equipment, and particularly relates to an energy-saving RH hydraulic jacking proportional valve control system.
Background
With economic development and advances in the steel industry, manufacturers have increasingly higher requirements on the practicality and usability of steel production equipment. The ladle lifting mechanism is key equipment of an RH refining process, and in a treatment position, the ladle and the ladle car are lifted by the hydraulic lifting mechanism. The hydraulic jacking mechanism comprises a hydraulic oil source, a hydraulic control device, a jacking hydraulic cylinder and a jacking frame, and the speed of the jacking hydraulic cylinder is automatically controlled by the hydraulic control device according to a preset speed curve.
The hydraulic jacking mechanism has the advantages of large load, long vertical lifting stroke, stable hydraulic jacking control speed, small impact and reliable operation. The hydraulic jacking device generally adopts a proportional pump control hydraulic device or a proportional valve control hydraulic device.
The RH hydraulic jacking device controlled by the proportional throttle valve is a novel proportional valve control device, but because a conventional constant-pressure variable pump source is used as a power source, the RH hydraulic jacking device is in a high-pressure small-flow state for a long time in a standby state, the energy consumption of a pump station is relatively high, the heating of the pump station is large, and the abrasion of a main pump is also large.
Disclosure of Invention
The invention aims to solve the problems that the energy consumption of a pump station is relatively high, the heating of the pump station and the abrasion of a main pump are large when the conventional constant-pressure variable pump source is used as a power source.
The invention provides an energy-saving RH hydraulic jacking proportional valve control system, which comprises two hydraulic cylinders, a hydraulic control mechanism for controlling the lifting of the two hydraulic cylinders, a hydraulic pump source group and a hydraulic oil tank mechanism for providing hydraulic power for the hydraulic control mechanism, a high-low pressure switching mechanism for switching the high pressure and the low pressure of the hydraulic pump source group, and a pilot control pump group; the hydraulic pump source group comprises at least two groups of hydraulic main pumps, an inlet of each group of hydraulic main pumps is connected with the hydraulic oil tank mechanism through a first butterfly valve, and an outlet of each group of hydraulic main pumps is connected with a first high-pressure filter and a first overflow valve; each group of hydraulic main pumps is connected with the high-low pressure switching mechanism; the high-low pressure switching mechanism comprises a high-pressure pipeline controlled by a relief valve III and a low-pressure pipeline controlled by an electromagnetic ball valve I and a relief valve IV; the pilot control pump set comprises at least one group of pilot pumps, an inlet of each pilot pump is connected with the hydraulic oil tank mechanism through a second butterfly valve, and an outlet of each pilot pump is connected with a second high-pressure filter and a second overflow valve; the pilot control pump set is connected with the hydraulic pump source set and the hydraulic control mechanism; the hydraulic control mechanism, the hydraulic pump source group, the high-low pressure switching mechanism and the pilot control pump group are all connected with the hydraulic oil tank mechanism.
Further, the hydraulic control mechanism comprises a plug-in proportional valve control rising loop, a plug-in proportional valve control falling loop and a two-station switching and locking loop for switching the plug-in proportional valve control rising loop and the plug-in proportional valve control falling loop, wherein the plug-in proportional valve control rising loop and the plug-in proportional valve control falling loop are respectively provided with a plug-in proportional throttle valve I and a plug-in proportional throttle valve II, the plug-in proportional valve control rising loop and the plug-in proportional valve control falling loop are both connected with the output ends of the pilot control pump set and the hydraulic pump source group, and the two-station switching and locking loop is connected with two hydraulic cylinders and used for switching and locking the work of the two hydraulic cylinders.
Furthermore, a manual control loop for manually controlling hydraulic pressure to rise through a ball valve and a throttle valve is arranged on the plug-in proportional valve control rising loop in parallel, and the plug-in proportional valve control rising loop is connected between the hydraulic pump source group and the two-station switching and locking loop.
Further, the plug-in proportional valve control descending loop is further connected with a plug-in type pressure reducing valve in series and used for sharing the pressure drop of a plug-in type proportional throttle valve II, the plug-in type pressure reducing valve is connected with an inlet of the plug-in type proportional throttle valve II, an outlet of the plug-in type proportional throttle valve II is connected with the hydraulic oil tank mechanism through a plug-in type one-way valve, the plug-in type pressure reducing valve is connected with the output end of the hydraulic pump source group, and the plug-in type proportional throttle valve II is connected with the output end of the pilot control pump group.
Further, the two-station switching and locking loop comprises a three-position four-way electromagnetic reversing valve and two plug-in type logic valves, wherein A, B ports of the three-position four-way electromagnetic reversing valve are respectively connected with the two plug-in type logic valves, the two plug-in type logic valves are respectively connected with the two hydraulic cylinders, and P ports of the three-position four-way electromagnetic reversing valve are respectively connected with the two hydraulic cylinders through two one-way valves; and the P port of the three-position four-way electromagnetic reversing valve is also connected with the output end of the pilot control pump set.
Further, an electromagnetic ball valve II, a one-way throttle valve, a pressure switch III and a ball valve III are sequentially arranged between the two-station switching and locking loop and the hydraulic cylinder.
Further, hydraulic oil tank mechanism includes oil tank, circulation filtration cooling circuit and oil return filter, circulation filtration cooling circuit is including screw pump, circulation filter, the cooler that connects gradually, the screw pump passes through butterfly valve III and is connected with the oil tank, the exit linkage of cooler is to the oil tank, oil return filter's export is connected with the oil tank, oil return filter's import with hydraulic control mechanism's oil return end is connected.
Further, an air filter, a liquid level meter, a thermometer and an electric heater are arranged in the oil tank.
Furthermore, the pilot control pump set further comprises an energy accumulator, the energy accumulator is connected with the overflow valve II through an energy accumulator safety valve group, and a pressure switch I is connected to the energy accumulator.
Further, the outlet end of the hydraulic pump source group is connected with a second pressure switch.
Compared with the prior art, the invention has the beneficial effects that:
(1) The energy-saving RH hydraulic jacking proportional valve control system provided by the invention adopts the variable plunger pump controlled by remote pressure, and the pressure of the hydraulic pump source group in different working states is switched through the high-low pressure switching mechanism, so that the hydraulic pump source group is in a low-pressure state when the hydraulic cylinder is in standby and descends, thereby effectively reducing energy consumption, reducing the heating of the hydraulic system and reducing the abrasion of a main pump in the hydraulic pump source group.
(2) The energy-saving RH hydraulic jacking proportional valve control system provided by the invention provides an auxiliary oil source for a hydraulic control mechanism by arranging the pilot control pump set with small flow and stable pressure, so that the first plug-in type proportional throttle valve and the second plug-in type proportional throttle valve can work stably and reliably, the pilot control pump set can be used as a pilot control oil path of a two-station switching and locking loop, and the stability and reliability of the system are improved while energy is saved.
(3) According to the hydraulic control mechanism in the energy-saving RH hydraulic jacking proportional valve control system, provided by the invention, the ladle can be manually controlled to ascend at a low speed under the condition of first fault or electric fault of the plug-in type proportional throttle valve by arranging the manual control loop, so that the manual operation in a fault state is ensured to meet the production requirement, and the working stability of the system is further improved.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a pump station structure of an energy-saving RH hydraulic lifting proportional valve control system of the present invention;
fig. 2 is a schematic structural diagram of a hydraulic control mechanism in the energy-saving RH hydraulic jacking proportional valve control system of the present invention.
Reference numerals illustrate: 1. a butterfly valve I; 2. a hydraulic main pump; 3. a high-pressure filter I; 4. a first check valve; 5. a ball valve I; 6. an overflow valve I; 7. a butterfly valve II; 8. a pilot pump; 9. an overflow valve II; 10. a second high-pressure filter; 11. a second check valve; 12. a ball valve II; 13. an accumulator safety valve group; 14. an accumulator; 15. a first pressure switch; 16. an electromagnetic ball valve I; 17. an overflow valve III; 18. an overflow valve IV; 19. a second pressure switch; 20. a cooler; 21. an electromagnetic water valve; 22. a circulation filter; 23. a third check valve; 24. a screw pump; 25. a butterfly valve III; 26. an air cleaner; 27. a liquid level gauge; 28. an oil tank; 29. a thermometer; 30. an electric heater; 31. an oil return filter; 32. a check valve IV; 33. a ball valve; 34. a throttle valve; 35. a first plug-in type proportional throttle valve; 36. a cartridge-type one-way valve; 37. a second plug-in type proportional throttle valve; 38. a cartridge pressure relief valve; 39. a cartridge logic valve; 40. a check valve V; 41. three-position four-way electromagnetic reversing valve; 42. and a hydraulic cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1 and 2, the present embodiment provides an energy-saving RH hydraulic jacking proportional valve control system, which includes two hydraulic cylinders 42, a hydraulic control mechanism for controlling the lifting of the two hydraulic cylinders 42, a hydraulic pump source group and a hydraulic tank mechanism for providing hydraulic power to the hydraulic control mechanism, a high-low pressure switching mechanism for switching the high-low pressure of the hydraulic pump source group, and a pilot control pump group.
Specifically, the hydraulic pump source group comprises at least two groups of hydraulic main pumps 2, three groups of hydraulic main pumps 2 are adopted in the embodiment, the two-purpose hydraulic main pumps are used for one purpose, the inlet of each group of hydraulic main pumps 2 is connected with a hydraulic oil tank mechanism through a butterfly valve I1, the outlet of each group of hydraulic main pumps 2 is connected with a high-pressure filter I3 and an overflow valve I6, each group of hydraulic main pumps 2 absorbs oil from the hydraulic oil tank mechanism through the butterfly valve I1, and clean pressure oil P is pumped out after being filtered by the high-pressure filter I3 for hydraulic jacking; the overflow valve I6 is used as a safety valve, and the pipeline load is unloaded before the hydraulic main pump 2 is started and stopped, so that the hydraulic main pump 2 is started and stopped more stably; optimally, a one-way valve I4 and a ball valve I5 are arranged behind the high-pressure filter I3 to prevent oil from flowing backwards; the first butterfly valve 1 is provided with a position signaling device which is used for ensuring that the rest standby hydraulic main pumps 2 are reliably locked when the used hydraulic main pumps 2 work. In order to further ensure the pressure stability of the pressure oil P pumped by the hydraulic pump source group, the outlet end of the hydraulic pump source group is connected with a second pressure switch 19, and the pressure of the pressure oil P is detected through the second pressure switch 19, so that the pressure oil P can provide a pressure-stable hydraulic power source for the hydraulic control mechanism, and the stability of the system is improved.
And each group of hydraulic main pumps 2 are connected with the high-low pressure switching mechanism, and aiming at specific working conditions, the hydraulic main pumps 2 are subjected to remote pressure setting and pressure switching through the high-low pressure switching mechanism, and under RH jacking standby and descending working conditions, the hydraulic main pumps 2 are switched to be in a low-pressure state, so that the problem of energy consumption caused by the fact that the existing hydraulic main pumps 2 are in a high-pressure state for a long time is avoided, and the energy consumption is effectively reduced. Specifically, the high-low pressure switching mechanism comprises a high-pressure pipeline controlled by a third overflow valve 17 and a low-pressure pipeline controlled by a first electromagnetic ball valve 16 and a fourth overflow valve 18, wherein the high-pressure pipeline and the low-pressure pipeline are connected in parallel, and the high-low pressure is switched by the on-off of the first electromagnetic ball valve 16.
The pilot control pump set comprises at least one group of pilot pumps 8, in the embodiment, two groups of pilot pumps 8 are adopted, one is used for preparation, an inlet of each pilot pump 8 is connected with a hydraulic oil tank mechanism through a butterfly valve II 7, an outlet of each pilot pump 8 is connected with a high-pressure filter II 10 and an overflow valve II 9, the pilot pumps 8 absorb oil from a hydraulic mailbox mechanism through the butterfly valve II 7, clean pilot control and auxiliary pressure oil P1 is pumped after being filtered through the high-pressure filter II 10, the pilot control pump set is connected with a hydraulic pump source group and the hydraulic control mechanism, the pilot control pump set provides auxiliary pressure oil for the hydraulic pump source group, and provides a pilot control oil source for the hydraulic control mechanism; and the overflow valve II 9 serves as a safety valve, and the pipeline load of the pilot pump 8 is unloaded before the pilot pump 8 is started and stopped, so that the start and stop of the pilot pump 8 are more stable. Optimally, a second check valve 11 and a second ball valve 12 are arranged behind the second high-pressure filter 10 to prevent oil from flowing backwards; the butterfly valve II 7 is also provided with a position signaling device which is used for ensuring that the rest standby pilot pumps 8 are reliably locked when the used pilot pumps 8 work. In addition, in order to save energy better, the energy of the pilot control pump set can be saved, so the pilot control pump set can further comprise an energy accumulator 14, the energy accumulator 14 is connected with the overflow valve II 9 through an energy accumulator safety valve group 13, and a pressure switch I15 is connected to the energy accumulator 14.
The hydraulic oil tank mechanism comprises an oil tank 28, a circulating filtering cooling circuit and an oil return filter 31, wherein the circulating filtering cooling circuit comprises a screw pump 24, a circulating filter 22 and a cooler 20 which are sequentially connected, the screw pump 24 is connected with the oil tank 28 through a butterfly valve III 25, an outlet of the cooler 20 is connected to the oil tank 28, the screw pump 24 absorbs oil from the oil tank 28 through the butterfly valve III 25, oil from the screw pump 24 returns to the oil tank 28 after passing through the circulating filter 22 and the cooler 20 to form a circulating filtering cooling circuit, the oil is filtered through the circulating filtering cooling circuit to ensure the cleanliness of the system, and the cooler 20 realizes the physical cooling of the oil through convection of cooling water and the oil; the outlet pipeline of the screw pump 24 is provided with a check valve III 23 for preventing the oil from flowing backwards. The outlet of the oil return filter 31 is connected with the oil tank 28, the inlet of the oil return filter 31 is connected with the oil return end of the hydraulic control mechanism through an oil return path T, a check valve IV 32 is arranged on the oil return path T to prevent oil from flowing back, and pressure oil returns to the oil tank 28 after being filtered by the oil return filter 31 when the hydraulic cylinder descends, so that energy is saved, and the cleanliness of the system is ensured. Optimally, an air filter 26, a liquid level meter 27, a thermometer 29 and an electric heater 30 are arranged in the oil tank 28, the air filter 26 is used for breathing and air filtering, the liquid level meter 27 is used for detecting the liquid level of the oil tank 28, the thermometer 29 is used for detecting the temperature of oil liquid in the oil tank 28, the electromagnetic water valve 21 of the cooler 20 is opened when the temperature of the oil liquid is higher, cooling water is led to physically cool the oil liquid, the electric heater 30 is started when the temperature of the oil liquid is lower, the oil liquid is heated, and the circulation or blocking of the cooling water and the opening or closing of the electric heater 30 are controlled through the interlocking of the temperature of the oil liquid in the oil tank 28.
As shown in fig. 2, the hydraulic control mechanism includes a plug-in proportional valve control rising loop, a plug-in proportional valve control falling loop, and two station switching and locking loops for switching the plug-in proportional valve control rising loop and the plug-in proportional valve control falling loop, wherein the plug-in proportional valve control rising loop and the plug-in proportional valve control falling loop are respectively provided with a plug-in proportional throttle valve one 35 and a plug-in proportional throttle valve two 37, and the two station switching and locking loops are connected with the two hydraulic cylinders 42 and are used for switching and locking the work of the two hydraulic cylinders 42; the pressure oil P pumped out by the hydraulic pump source group enters the hydraulic cylinder 42 through a first plug-in proportional throttle valve 35 of a plug-in proportional valve control rising loop, and the opening degree of the first plug-in proportional throttle valve 35 is used for adjusting the rising speed of the hydraulic cylinder 42 and is suitable for large-flow speed control; the descending of the hydraulic cylinder 42 is realized by dead weight, and the descending speed of the hydraulic cylinder 42 can be regulated and controlled by the opening degree of the second plug-in type proportional throttle valve 37; meanwhile, the first plug-in type proportional throttle valve 35 and the second plug-in type proportional throttle valve 37 can be connected with the output end of the pilot control pump set, and pilot control oil P1 pumped by the pilot control pump set is used as a pilot control oil way of the first plug-in type proportional throttle valve 35 and the second plug-in type proportional throttle valve 37, so that the stability of the system is improved.
Optimally, the plug-in proportional valve control descending loop is also connected with a plug-in type pressure reducing valve 38 in series, so that the pressure drop of a plug-in type proportional throttle valve II 37 is shared when the hydraulic cylinder 42 descends, the energy is saved, the operation is stable, the descending speed control precision is ensured, the plug-in type pressure reducing valve 38 is connected with the inlet of the plug-in type proportional throttle valve II 37, the outlet of the plug-in type proportional throttle valve II 37 is connected with the hydraulic oil tank mechanism through a plug-in type one-way valve 36, and the pressure oil returns to the hydraulic oil tank mechanism through the plug-in type pressure reducing valve 38 and the plug-in type proportional throttle valve II 37 after the hydraulic cylinder 42 descends.
In order to ensure that the normal production can be realized under the condition of faults in the plug-in proportional valve control rising loop, such as the fault of a plug-in proportional throttle valve 35 or electrical faults, a manual control loop for manually controlling hydraulic lifting through a ball valve 33 and a throttle valve 34 is arranged on the plug-in proportional valve control rising loop in parallel, and the manual control loop is connected between the hydraulic pump source group and the two-station switching and locking loop, and the positions of the ball valve 33 and the throttle valve 34 are manually adjusted, so that the hydraulic cylinder 42 is manually and slowly lifted, the ladle is lifted at a low speed, and the manual operation under the fault state is ensured to meet the production requirements.
The two-station switching and locking loop comprises a three-position four-way electromagnetic directional valve 41 and two plug-in type logic valves 39, A, B ports of the three-position four-way electromagnetic directional valve 41 are respectively connected with the two plug-in type logic valves 39, the two plug-in type logic valves 39 are respectively connected with the two hydraulic cylinders 42, P ports of the three-position four-way electromagnetic directional valve 41 are respectively connected with the two hydraulic cylinders 42 through two one-way valves five 40, the three-position four-way electromagnetic directional valve 41 is powered off through two electromagnetic coils to respectively control the opening and closing of the two plug-in type logic valves 39 so as to switch the two hydraulic cylinders 42, and when the three-position four-way electromagnetic valve 41 is located at the middle position, the two plug-in type logic valves 39 are closed, and meanwhile, the arrangement of the two one-way valves five 40 can ensure reliable locking of the hydraulic cylinders 42. Preferably, the plug-in logic valve 39 is provided with a position signaling device for opening the hydraulic cylinder 42, so as to ensure that the other hydraulic cylinder 42 is reliably locked when the hydraulic cylinder 42 is working.
Further, the P port of the three-position four-way electromagnetic directional valve 41 is also connected with the output end of the pilot control pump set, and the pilot control oil P1 output by the pilot control pump set is used as the control oil of the plug-in logic valve 39, so that the reliability of the hydraulic system is improved. In addition, an electromagnetic ball valve II 46, a one-way throttle valve 45, a pressure switch III 44 and a ball valve III 43 are sequentially arranged between the two-station switching and locking loop and the hydraulic cylinder, and are used for opening a hydraulic control one-way valve on the hydraulic cylinder 42 and also used for switching the two-station hydraulic cylinder 42; the switching and locking of the hydraulic cylinder 42 are realized by the electromagnetic ball valve II 46, the one-way throttle valve 45, the pressure switch III 44 and the ball valve III 43, and the hydraulic cylinder can be operated under the condition of two-station switching and locking loops, so that the reliability of the system is improved. And the electromagnetic ball valve II 46 can also be connected with the output end of the pilot control pump set, and the pilot control oil P1 output by the pilot control pump set is used as control oil for opening the hydraulic control one-way valve on the hydraulic cylinder 42, so that the reliability of the hydraulic system is further improved.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (10)
1. An energy-saving RH hydraulic jacking proportional valve control system is characterized in that: the hydraulic control system comprises two hydraulic cylinders, a hydraulic control mechanism for controlling the lifting of the two hydraulic cylinders, a hydraulic pump source group and a hydraulic oil tank mechanism for providing hydraulic power for the hydraulic control mechanism, a high-low pressure switching mechanism for switching the high pressure and the low pressure of the hydraulic pump source group, and a pilot control pump group;
the hydraulic pump source group comprises at least two groups of hydraulic main pumps, an inlet of each group of hydraulic main pumps is connected with the hydraulic oil tank mechanism through a first butterfly valve, and an outlet of each group of hydraulic main pumps is connected with a first high-pressure filter and a first overflow valve; each group of hydraulic main pumps is connected with the high-low pressure switching mechanism;
the high-low pressure switching mechanism comprises a high-pressure pipeline controlled by a relief valve III and a low-pressure pipeline controlled by an electromagnetic ball valve I and a relief valve IV;
the pilot control pump set comprises at least one group of pilot pumps, an inlet of each pilot pump is connected with the hydraulic oil tank mechanism through a second butterfly valve, and an outlet of each pilot pump is connected with a second high-pressure filter and a second overflow valve; the pilot control pump set is connected with the hydraulic pump source set and the hydraulic control mechanism;
the hydraulic control mechanism, the hydraulic pump source group, the high-low pressure switching mechanism and the pilot control pump group are all connected with the hydraulic oil tank mechanism;
wherein RH is molten steel vacuum circulation degassing method.
2. The energy efficient RH hydraulic jacking proportioning valve control system of claim 1 wherein: the hydraulic control mechanism comprises a plug-in proportional valve control ascending loop, a plug-in proportional valve control descending loop and a two-station switching and locking loop for switching the plug-in proportional valve control ascending loop and the plug-in proportional valve control descending loop, wherein the plug-in proportional valve control ascending loop and the plug-in proportional valve control descending loop are respectively provided with a plug-in proportional throttle valve I and a plug-in proportional throttle valve II, the plug-in proportional valve control ascending loop and the plug-in proportional valve control descending loop are both connected with the output ends of the pilot control pump set and the hydraulic pump source set, and the two-station switching and locking loop is connected with two hydraulic cylinders and used for switching and locking the work of the two hydraulic cylinders.
3. The energy efficient RH hydraulic jacking proportioning valve control system of claim 2 wherein: the plug-in proportional valve control lifting loop is connected with a manual control loop which is used for manually controlling hydraulic lifting through a ball valve and a throttle valve in parallel, and is connected between the hydraulic pump source group and the two-station switching and locking loop.
4. The energy efficient RH hydraulic jacking proportioning valve control system of claim 2 wherein: the hydraulic pump is characterized in that a plug-in type pressure reducing valve is further connected in series on the plug-in type proportional valve control descending loop and used for sharing the pressure drop of a plug-in type proportional throttle valve II, the plug-in type pressure reducing valve is connected with the inlet of the plug-in type proportional throttle valve II, the outlet of the plug-in type proportional throttle valve II is connected with the hydraulic oil tank mechanism through a plug-in type one-way valve, the plug-in type pressure reducing valve is connected with the output end of the hydraulic pump source group, and the plug-in type proportional throttle valve II is connected with the output end of the pilot control pump group.
5. The energy efficient RH hydraulic jacking proportioning valve control system of claim 2 wherein: the two-station switching and locking loop comprises a three-position four-way electromagnetic directional valve and two plug-in type logic valves, A, B ports of the three-position four-way electromagnetic directional valve are respectively connected with the two plug-in type logic valves, the two plug-in type logic valves are respectively connected with the two hydraulic cylinders, and P ports of the three-position four-way electromagnetic directional valve are respectively connected with the two hydraulic cylinders through two one-way valves; and the P port of the three-position four-way electromagnetic reversing valve is also connected with the output end of the pilot control pump set.
6. The energy efficient RH hydraulic jacking proportioning valve control system of claim 5 wherein: and an electromagnetic ball valve II, a one-way throttle valve, a pressure switch III and a ball valve III are sequentially arranged between the two-station switching and locking loop and the hydraulic cylinder.
7. The energy efficient RH hydraulic jacking proportioning valve control system of claim 1 wherein: the hydraulic oil tank mechanism comprises an oil tank, a circulating filtration cooling loop and an oil return filter, wherein the circulating filtration cooling loop comprises a screw pump, a circulating filter and a cooler which are sequentially connected, the screw pump is connected with the oil tank through a butterfly valve III, an outlet of the cooler is connected to the oil tank, an outlet of the oil return filter is connected with the oil tank, and an inlet of the oil return filter is connected with an oil return end of the hydraulic control mechanism.
8. The energy efficient RH hydraulic jacking proportioning valve control system of claim 7 wherein: an air filter, a liquid level meter, a thermometer and an electric heater are arranged in the oil tank.
9. The energy efficient RH hydraulic jacking proportioning valve control system of claim 1 wherein: the pilot control pump set further comprises an energy accumulator, the energy accumulator is connected with the overflow valve II through an energy accumulator safety valve group, and a pressure switch I is connected to the energy accumulator.
10. The energy efficient RH hydraulic jacking proportioning valve control system of claim 1 wherein: and the outlet end of the hydraulic pump source group is connected with a second pressure switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553623.6A CN109505811B (en) | 2018-12-19 | 2018-12-19 | Energy-saving RH hydraulic jacking proportional valve control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553623.6A CN109505811B (en) | 2018-12-19 | 2018-12-19 | Energy-saving RH hydraulic jacking proportional valve control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109505811A CN109505811A (en) | 2019-03-22 |
| CN109505811B true CN109505811B (en) | 2023-12-29 |
Family
ID=65753652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811553623.6A Active CN109505811B (en) | 2018-12-19 | 2018-12-19 | Energy-saving RH hydraulic jacking proportional valve control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109505811B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922929B (en) * | 2019-12-05 | 2023-04-11 | 上海智远慧智能技术股份有限公司 | AGV hydraulic jacking device and heating control method based on system overflow |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055005A (en) * | 1998-08-05 | 2000-02-22 | Hitachi Constr Mach Co Ltd | Hydraulic driving device |
| JP2015059602A (en) * | 2013-09-18 | 2015-03-30 | ダイキン工業株式会社 | Construction machinery |
| CN204985136U (en) * | 2015-08-26 | 2016-01-20 | 徐工集团工程机械股份有限公司科技分公司 | Unloading valve piece, switching core hydraulic system and engineering machinery |
| CN105604991A (en) * | 2016-01-21 | 2016-05-25 | 燕山大学 | Cabin door opening and closing hydraulic control system of underwater vehicle |
| CN106996400A (en) * | 2017-05-03 | 2017-08-01 | 中冶南方工程技术有限公司 | A kind of RH steel ladle jacking hydraulic systems of proportioning pump and proportional valve control |
| CN209340247U (en) * | 2018-12-19 | 2019-09-03 | 中冶南方工程技术有限公司 | A kind of energy-saving RH hydraulic lifting Proportional Valve-controlled system |
-
2018
- 2018-12-19 CN CN201811553623.6A patent/CN109505811B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055005A (en) * | 1998-08-05 | 2000-02-22 | Hitachi Constr Mach Co Ltd | Hydraulic driving device |
| JP2015059602A (en) * | 2013-09-18 | 2015-03-30 | ダイキン工業株式会社 | Construction machinery |
| CN204985136U (en) * | 2015-08-26 | 2016-01-20 | 徐工集团工程机械股份有限公司科技分公司 | Unloading valve piece, switching core hydraulic system and engineering machinery |
| CN105604991A (en) * | 2016-01-21 | 2016-05-25 | 燕山大学 | Cabin door opening and closing hydraulic control system of underwater vehicle |
| CN106996400A (en) * | 2017-05-03 | 2017-08-01 | 中冶南方工程技术有限公司 | A kind of RH steel ladle jacking hydraulic systems of proportioning pump and proportional valve control |
| CN209340247U (en) * | 2018-12-19 | 2019-09-03 | 中冶南方工程技术有限公司 | A kind of energy-saving RH hydraulic lifting Proportional Valve-controlled system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109505811A (en) | 2019-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102145550B (en) | Energy-saving cooling device | |
| CN206874583U (en) | A kind of aerial work platform hydraulic energy-saving system | |
| CN201461604U (en) | Double-station hydraulic jacking system for RH steel ladles | |
| CN206872378U (en) | A kind of aerial work platform hydraulic energy-saving system with no-load protection | |
| CN102021256A (en) | Circulating cooling water system of blast-furnace tuyere small sleeve | |
| CN109505811B (en) | Energy-saving RH hydraulic jacking proportional valve control system | |
| CN103144566B (en) | A kind of large-tonnage highway quarry tipper lifting hydraulic system | |
| CN109296571A (en) | A kind of hydraulic cushion cylinder control system that lifting speed is controllable | |
| CN104848294A (en) | High-temperature-water heat exchange low-temperature-water direct connection heating system | |
| CN106996400A (en) | A kind of RH steel ladle jacking hydraulic systems of proportioning pump and proportional valve control | |
| CN201981217U (en) | Circulating cooling water system of small blast-furnace tuyere sleeve | |
| CN209340247U (en) | A kind of energy-saving RH hydraulic lifting Proportional Valve-controlled system | |
| CN109854547A (en) | Long-range pressure regulation load-sensitive hydraulic station | |
| CN205063484U (en) | Fluid pressure type stereo garage liquid accuse system | |
| CN209083711U (en) | A kind of hydraulic cushion cylinder control system that lifting speed is controllable | |
| CN107256992A (en) | The temperature automatic adjustment system of lithium-ion-power cell in electric automobile | |
| CN207961100U (en) | A kind of hydraulic control system of flap valve device | |
| CN2743116Y (en) | Circulating water type mould temperature control machine | |
| CN211116943U (en) | Cooling system for oil tank of press | |
| CN208982380U (en) | A kind of accumulation of energy regenerating energy-saving folding modular system | |
| CN212376993U (en) | Hydraulic transmission system and entertainment facility | |
| CN104848290A (en) | Secondary pump frequency conversion heating system for building clusters | |
| CN208997051U (en) | A kind of plug support frame quick pressure releasing control loop | |
| CN205187744U (en) | Hydro -cylinder hydraulic drive system with prevent inhaling sky function | |
| CN209127965U (en) | A kind of hydraulic elevating platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |