CN117927519A - Vacuumizing hydraulic control system and method - Google Patents
Vacuumizing hydraulic control system and method Download PDFInfo
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- CN117927519A CN117927519A CN202410030533.8A CN202410030533A CN117927519A CN 117927519 A CN117927519 A CN 117927519A CN 202410030533 A CN202410030533 A CN 202410030533A CN 117927519 A CN117927519 A CN 117927519A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 claims abstract description 182
- 238000004146 energy storage Methods 0.000 claims abstract description 71
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 64
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 abstract description 13
- 238000004512 die casting Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The specification relates to the field of automobile die-casting vacuumizing equipment, and relates to a vacuumizing hydraulic control system and method. The system comprises a hydraulic cylinder, a vacuum hydraulic valve, a main pressure oil pipe, a first oil return pipe, an energy accumulator, a control center, an energy storage device and an energy release device; the piston rod of the hydraulic oil cylinder is in telescopic connection with the vacuum hydraulic valve, the rodless cavity of the hydraulic oil cylinder is connected with the main pressure oil pipe, the rodless cavity and the rod cavity of the hydraulic oil cylinder are respectively connected with the first oil return pipe, and the rodless cavity oil pipe and the rod cavity oil pipe of the hydraulic oil cylinder are respectively provided with the hydraulic valve; the energy accumulator provides a power source for the hydraulic oil cylinder, and the energy storage device and the energy release device respectively control the energy storage and the energy release of the energy accumulator; the control center controls the actions of the energy storage device and the energy release device and also controls the opening and closing of the hydraulic valve. According to the vacuumizing hydraulic control system and the vacuumizing hydraulic control method, the response of the vacuum hydraulic valve is rapid, and the die casting of high-quality parts can be effectively guaranteed.
Description
Technical Field
The embodiment of the disclosure relates to the field of automobile die casting vacuumizing equipment, in particular to a vacuumizing hydraulic control system and method.
Background
With the rise of new energy automobiles, more and more automobile main engine factories select aluminum alloy high-pressure casting as a molding process of a vehicle body structural member. The high pressure casting process is to fill liquid or semi-solid metal into the cavity of the casting mold to form the metal under high pressure. Before die casting, vacuumizing treatment is usually needed to remove impurities such as gas and bubbles in the material, so that the forming effect of the product is not affected, defects such as pinholes and bubbles on the product are reduced, and the product quality is improved. However, the die casting process is a very rapid process, the liquid aluminum alloy only experiences a few milliseconds from the pouring gate to the filling of the whole die cavity, the gas in the die cavity and the pouring gate needs to be completely discharged in a very short time, and if the gas is not discharged timely, air holes are formed in the product, so that the yield of production is affected. Therefore, high requirements are put on the control of the vacuumizing treatment before die casting, and if the vacuum valve is closed too early, poor air exhaust is easily caused, so that the quality requirements of products are not met; if the vacuum valve is closed too late, the aluminum liquid is easy to enter the vacuum system to cause blockage, and the vacuum equipment is damaged.
At present, three main modes for controlling vacuum exhaust are a mechanical vacuum valve, an exhaust block and a hydraulic vacuum valve, wherein the action response of the hydraulic vacuum valve mode is fastest, and the obtained vacuum degree is highest. The existing hydraulic vacuum valve enables a piston rod connected with the hydraulic vacuum valve to stretch and move by controlling the hydraulic pressure in the hydraulic cylinder, so as to control the opening and closing of the hydraulic vacuum valve; the hydraulic cylinder is respectively connected with the oil inlet pipe and the oil outlet pipe, and controls the oil to enter and exit through the hydraulic valve, so as to realize the control of different hydraulic pressures. The closing response time of the method is about 30-50ms, and although the method can meet the process requirements of most structural parts, the production requirements of parts with higher individual quality requirements can not be guaranteed, and a vacuum exhaust control method with faster response is needed.
Disclosure of Invention
Embodiments of the present disclosure provide a vacuum hydraulic control system and method that address one or more of the above problems, as well as other potential problems.
In order to achieve the above object, the following technical scheme is provided:
According to a first aspect of the present specification, there is provided a vacuum hydraulic control system comprising a hydraulic cylinder, a vacuum hydraulic valve, a main pressure oil pipe, a first oil return pipe, an accumulator, a control center, an energy storage device and an energy release device; the piston rod of the hydraulic oil cylinder is in telescopic connection with the vacuum hydraulic valve, the rodless cavity of the hydraulic oil cylinder is connected with the main pressure oil pipe, the rod cavity of the hydraulic oil cylinder is connected with the energy release device, the rodless cavity and the rod cavity of the hydraulic oil cylinder are both connected with the first oil return pipe, and the rodless cavity oil pipe and the rod cavity oil pipe of the hydraulic oil cylinder are both provided with the hydraulic valve; the main pressure oil pipe is pressurized, the hydraulic valve is opened, pressure oil enters a rodless cavity of the hydraulic oil cylinder, oil in the rod cavity of the hydraulic oil cylinder enters the first oil return pipe, the hydraulic pressure of the rodless cavity of the hydraulic oil cylinder is higher than that of the rod cavity, the piston rod extends out, and the vacuum hydraulic valve is opened; the energy accumulator is respectively connected with the energy storage device and the energy release device, and the energy storage device is connected with the main pressure oil pipe; the main pressure oil pipe is pressurized, the energy storage device is opened, the energy discharging device and the hydraulic valve are closed, and pressure oil enters the energy accumulator through the energy storage device to store energy; after the energy storage of the energy accumulator is finished, the energy storage device is closed, the energy discharging device controls the energy accumulator to discharge energy, pressure oil enters a rod cavity of the hydraulic oil cylinder, oil in a rodless cavity of the hydraulic oil cylinder enters the first oil return pipe, the hydraulic pressure of the rod cavity of the hydraulic oil cylinder is higher than that of the rodless cavity, the piston rod is retracted, and the vacuum hydraulic valve is closed; the control center controls the actions of the energy storage device and the energy release device and also controls the opening and closing of the hydraulic valve.
According to the vacuumizing hydraulic control system disclosed by the embodiment of the specification, the energy accumulator is matched with the related oil way, so that oil stored in the energy accumulator is quickly released to the hydraulic oil cylinder, the quick adjustment of the hydraulic pressure difference between the rod cavity and the rodless cavity of the hydraulic oil cylinder is realized, the quick closing of the vacuum hydraulic valve is further realized, the closing response of the vacuum hydraulic valve in vacuumizing operation is accelerated, the closing response time of the vacuum hydraulic valve is controlled within 10 milliseconds, and the vacuumizing control requirement of parts with higher quality requirements in die casting is effectively ensured.
In some embodiments, the energy release device comprises a cartridge valve, a reversing valve and a second oil return pipe, wherein an input port and an output port of the cartridge valve are respectively connected with the energy accumulator and a rod cavity of the hydraulic cylinder, and a control port of the cartridge valve is connected with the second oil return pipe and the energy accumulator through the reversing valve; when the reversing valve is opened, pressure oil of the energy accumulator flows into a control port of the cartridge valve through the reversing valve, and the cartridge valve is closed; when the reversing valve is reset, the oil of the control port of the cartridge valve flows into the second oil return pipe, the cartridge valve is opened, and the pressure oil of the energy accumulator flows into the rod cavity of the hydraulic oil cylinder through the cartridge valve.
In some embodiments, the energy storage device comprises an energy storage valve and a pressure relief valve, and the main pressure oil pipe, the pressure relief valve, the energy storage valve and the energy storage device are connected in sequence.
In some embodiments, the accumulator is provided with a pressure sensor, and the control center controls the energy storage device to stop energy storage when detecting that the pressure of the accumulator reaches a set value.
In some embodiments, the vacuum hydraulic valve is provided with a switch detection sensor for detecting the position of the piston rod, when the switch detection sensor is triggered by the piston rod, the control center controls the hydraulic valve to be closed, the hydraulic pressure of the rodless cavity and the rod cavity of the hydraulic oil cylinder is maintained, and the action of the piston rod is stopped.
In some embodiments, a rod cavity of the hydraulic cylinder is provided with a spring, and the direction of the spring is the same as that of the piston rod; one end of the spring is fixed on the inner wall of the hydraulic oil cylinder, and the other end of the spring is fixed on the piston rod base.
In some embodiments, the hydraulic valve is a dual-channel valve core, and oil flows into the first oil return pipe through two channels of the hydraulic valve when the hydraulic oil cylinder returns oil.
In some embodiments, a pressure relief valve is connected to the accumulator, and the pressure relief valve is connected to the second oil return pipe.
According to a second aspect of the present specification, there is provided a method of controlling vacuum hydraulic pressure, implemented using a vacuum hydraulic control system, the system comprising: the hydraulic system comprises a hydraulic cylinder, a vacuum hydraulic valve, a main pressure oil pipe, a first oil return pipe, a second oil return pipe, an energy accumulator, two hydraulic valves, a cartridge valve, a reversing valve, an energy storage valve, a pressure reducing valve and a control center; a piston rod of the hydraulic oil cylinder is connected with the vacuum hydraulic valve, and a switch detection sensor is arranged on the vacuum hydraulic valve; the rodless cavity and the rod cavity of the hydraulic oil cylinder are respectively connected with the main pressure oil pipe and the output oil port of the cartridge valve through the hydraulic valve, and the rodless cavity and the rod cavity of the hydraulic oil cylinder are also respectively connected with the first oil return pipe through the hydraulic valve; the input oil port of the cartridge valve is connected with the energy accumulator, and the control port of the cartridge valve is connected with the energy accumulator and the second oil return pipe through the reversing valve; the main pressure oil pipe, the pressure reducing valve, the energy storage valve and the energy accumulator are sequentially connected, and the energy accumulator is provided with a pressure sensor; the control center is used for receiving the instruction to control the opening and closing of each valve; the method comprises the following steps:
The control center controls the hydraulic valve, the reversing valve, the energy storage valve and the pressure reducing valve to be opened, the cartridge valve is closed, the main pressure oil pipe is pressurized, pressure oil enters a rodless cavity of the hydraulic oil cylinder through one hydraulic valve, oil in the rod cavity of the hydraulic oil cylinder flows into the first oil return pipe through the other hydraulic valve, hydraulic pressure between the rodless cavity and the rod cavity of the hydraulic oil cylinder enables the piston rod to extend, and a vacuumizing channel of the vacuum hydraulic valve is opened;
The control center receives a signal triggered by the piston rod from the switch detection sensor and then controls the hydraulic valve to be closed, and the piston rod stops moving; the pressure oil enters the energy accumulator through the pressure reducing valve and the energy storage valve, and when the pressure sensor detects that the pressure of the energy accumulator reaches a set value, the control center controls the energy storage valve to be closed;
After receiving the instruction of closing the vacuum hydraulic valve, the control center controls the reversing valve to be closed, oil in the control port of the cartridge valve flows into the second oil return pipe, the cartridge valve is opened, pressure oil in the energy accumulator enters the rod cavity of the hydraulic cylinder through the cartridge valve, oil in the rodless cavity of the hydraulic cylinder flows into the first oil return pipe, and hydraulic pressure between the rod cavity and the rodless cavity of the hydraulic cylinder enables the piston rod to retract, so that a vacuumizing channel of the vacuum hydraulic valve is closed.
In some embodiments, the reversing valve is connected to a boost amplifier to rapidly demagnetize the solenoid coil therein when the reversing valve is closed.
Drawings
The above, as well as additional purposes, features, and advantages of embodiments of the present specification will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the accompanying drawings, several embodiments of the present description are shown by way of example, and not by way of limitation.
Fig. 1 shows a schematic structural diagram of a vacuum hydraulic control system according to an embodiment of the present disclosure.
1-Hydraulic cylinder, 11-piston rod, 2-vacuum hydraulic valve, 21-valve seat, 22-valve core, 3-main pressure oil pipe, 41-first oil return pipe, 42-second oil return pipe, 5-accumulator, 61-pressure sensor, 62-switch detection sensor, 7-hydraulic valve, 81-cartridge valve, 82-reversing valve, 91-energy storage valve and 92-pressure reducing valve.
Like or corresponding reference characters indicate like or corresponding parts throughout the several views.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present description are shown in the drawings, it should be understood that the present description may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "upper," "lower," "front," "rear," and the like, as used herein, refer to a position or a positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the principles of the present specification, and do not indicate or imply that the elements referred to must have a particular orientation, be configured or operated in a particular orientation, and thus should not be construed as limiting the present specification.
A vacuum hydraulic control system according to an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings, and fig. 1 shows a schematic structural diagram of a vacuum hydraulic control system according to an embodiment of the present disclosure. The vacuumizing hydraulic control system of the embodiment of the specification comprises a hydraulic cylinder 1, a vacuum hydraulic valve 2, a main pressure oil pipe 3, a first oil return pipe 41, an energy accumulator 5, a control center, an energy storage device and an energy release device; the piston rod 11 of the hydraulic cylinder 1 is in telescopic connection with the vacuum hydraulic valve 2, the rodless cavity of the hydraulic cylinder 1 is connected with the main pressure oil pipe 3, the rod cavity of the hydraulic cylinder 1 is connected with the energy release device, the rodless cavity and the rod cavity of the hydraulic cylinder 1 are both connected with the first oil return pipe 41, and the rodless cavity oil pipe and the rod cavity oil pipe of the hydraulic cylinder 1 are both provided with the hydraulic valve 7; the main pressure oil pipe 3 is pressurized, the hydraulic valve 7 is opened, pressure oil enters a rodless cavity of the hydraulic oil cylinder 1, oil in the rod cavity of the hydraulic oil cylinder 1 enters the first oil return pipe 41, the hydraulic pressure of the rodless cavity of the hydraulic oil cylinder 1 is higher than that of the rod cavity, the piston rod 11 extends out, and the vacuum hydraulic valve 2 is opened; the energy accumulator 5 is respectively connected with the energy storage device and the energy discharging device, and the energy storage device is connected with the main pressure oil pipe 3; the main pressure oil pipe 3 is pressurized, the energy storage device is opened, the energy discharging device and the hydraulic valve 7 are closed, and pressure oil enters the energy storage device 5 through the energy storage device to store energy; after the energy storage of the energy storage device 5 is finished, the energy storage device is closed, the energy release device controls the energy storage device 5 to release energy, pressure oil enters a rod cavity of the hydraulic oil cylinder 1, oil in a rodless cavity of the hydraulic oil cylinder 1 enters the first oil return pipe 41, the hydraulic pressure of the rod cavity of the hydraulic oil cylinder 1 is greater than that of the rodless cavity, the piston rod 11 is retracted, and the vacuum hydraulic valve 2 is closed; the control center controls the actions of the energy storage device and the energy release device and also controls the opening and closing of the hydraulic valve 7.
The hydraulic cylinder 1 drives a load by means of hydraulic pressure to realize linear motion of the piston rod 11, and is mainly composed of a cylinder barrel, the piston rod 11 and a cylinder head seal. One part of the piston rod 11 is clamped in the cylinder barrel, the hydraulic cylinder 1 is divided into a rod cavity and a rodless cavity, and the other part extends out through the cylinder head; the hydraulic cylinder 11 is characterized in that the rod cavity and the rodless cavity are respectively provided with an oil port for entering oil, the hydraulic pressure difference between the rod cavity and the rodless cavity can be realized by adjusting the oil inlet and outlet of the oil ports, the piston rod 11 can move in a telescopic manner in the cylinder barrel, and the maximum distance of the movement of the piston rod 11 is limited by the depth of the cylinder barrel. The piston rod 11 is clamped on the base inside the cylinder barrel and is additionally provided with a sealing ring, so that oil between the rod cavity and the rodless cavity is prevented from leaking mutually, and the hydraulic control effect is affected.
The rod cavity of the hydraulic oil cylinder 1 is provided with a spring 12, and the direction of the spring 12 is the same as that of the piston rod 11; one end of the spring 12 is fixed on the inner wall of the hydraulic cylinder 1, and the other end is fixed on the base of the piston rod 11. When the vacuum hydraulic valve 2 is closed, the spring 12 provides an inward retraction force to the piston rod 11, so as to assist the piston rod 11 to retract the vacuum hydraulic valve 2 to close, and the closing response of the vacuum hydraulic valve 2 is quickened.
The vacuum hydraulic valve 2 comprises a valve seat 21, a valve core 22 and two runner ports on the valve seat 21, wherein the two runner ports are respectively connected with a die cavity of the die casting machine and a vacuumizing machine to form a vacuumizing channel. The piston rod 11 is in telescopic connection with the vacuum hydraulic valve 2, and is mainly connected with the valve core 22, the telescopic movement of the piston rod 11 can drive the valve core 21 to move in the valve seat 22, when the valve core 22 stretches out, the piston rod is connected with the runner port of the die cavity of the die casting machine, and the vacuumizing machine performs vacuumizing operation on the die cavity of the die casting machine; when the valve core 22 is retracted, the runner port connected with the die cavity of the die casting machine is closed, and vacuumizing is stopped; the opening and closing degree of the flow passage opening is related to the moving distance of the valve core 22, and the larger the extending distance of the valve core 22 is, the larger the opening degree of the flow passage opening is.
The vacuum hydraulic valve 2 is provided with a switch detection sensor 62 for detecting the position of the piston rod 11, when the switch detection sensor 62 is triggered by the piston rod 11, the control center controls the hydraulic valve 7 to be closed, the hydraulic pressure of a rodless cavity and a rod-containing cavity of the hydraulic cylinder 1 is maintained, and the action of the piston rod 11 is stopped. Specifically, the switch detecting sensor 62 is disposed on the valve seat 22, and when the piston rod 11 extends to a certain position, that is, after the vacuum hydraulic valve 2 is opened to a certain extent, the switch detecting sensor 62 is triggered, and the piston rod 11 stops moving, so as to maintain the opened state of the vacuum hydraulic valve 2. The switch detecting sensor 62 may be provided inside the valve seat to detect the movement of the valve element 21, and precisely control the opening/closing degree of the vacuum hydraulic valve 2.
The hydraulic valve 7 is an electromagnetic reversing valve, a closed cavity is arranged in the valve, through holes are formed in different positions of the closed cavity, each hole is connected with different oil pipes, a piston is arranged in the middle of the closed cavity, two electromagnets are arranged on two sides of the closed cavity, a magnet coil on which the two electromagnets are electrified, a valve body electrified in the middle is attracted to which side, and different through holes can be opened or closed through movement of the valve body. In this embodiment, when the hydraulic valve 7 is opened, a through hole connected between the rodless cavity oil pipe of the hydraulic cylinder 1 and the main pressure oil pipe 3 is opened, and pressure oil enters the rodless cavity of the hydraulic cylinder 1; the hydraulic cylinder 1 has a rod cavity oil pipe and a through hole connected with the first oil return pipe 41 is opened, and the rod cavity oil flows into the first oil return pipe 41. In this embodiment, the hydraulic valve 7 is a dual-channel valve core, and when the hydraulic cylinder 1 returns oil, the oil flows into the first oil return pipe 41 through two through holes of the hydraulic valve 7 at the same time, so that the flow area of the oil during oil return is increased, the back pressure of the hydraulic cylinder 1 during oil return is reduced, and the response speed of hydraulic conversion between the rod cavity and the rodless cavity of the hydraulic cylinder 1 is further improved.
The accumulator 5 is used for storing and discharging energy in an oil way, has high response speed, can release a large amount of energy in a short time, and reduces the response time of closing the vacuum hydraulic valve 2. When the vacuum hydraulic valve 2 is controlled to be closed, the compressed gas in the energy accumulator 5 can quickly push oil to flow out and enter the rod cavity of the hydraulic oil cylinder 1, so that the hydraulic pressure of the rod cavity of the hydraulic oil cylinder 1 is increased, the piston rod 11 is retracted, and the vacuum hydraulic valve 2 is closed.
The energy release device comprises a cartridge valve 81, a reversing valve 82 and a second oil return pipe 42, wherein an input main oil port and an output main oil port of the cartridge valve 81 are respectively connected with the energy accumulator 5 and a rod cavity of the hydraulic cylinder 1, and a control port of the cartridge valve 81 is connected with the second oil return pipe 42 and the energy accumulator 5 through the reversing valve 82; when the reversing valve 82 is opened, the pressure oil of the accumulator 5 flows into the control port of the cartridge valve 81 through the reversing valve 82, and the cartridge valve 81 is closed; when the reversing valve 82 is reset, the oil at the control port of the cartridge valve 81 flows into the second oil return pipe 42, the cartridge valve 81 is opened, and the pressure oil of the accumulator 5 flows into the rod cavity of the hydraulic cylinder 1 through the cartridge valve 81.
The cartridge valve 81 is composed of a valve core, a valve sleeve, a spring, a sealing ring, an input oil port, an output oil port and a control port, and when the acting force of the control port and the spring on the valve core is larger than the acting force of the input oil port and the output oil port, the cartridge valve 81 is closed; when the acting force of the control port and the spring on the valve core is smaller than or equal to the acting force of the input/output port, the cartridge valve 81 is opened, and the oil paths between the two ports are communicated. Therefore, the control port of the cartridge valve 81 is connected with the second oil return pipe 42 and the accumulator 5 through the reversing valve 82, the hydraulic pressure of the control port is regulated by the reversing valve 82, when the reversing valve 82 is opened, the control port is in oil circuit communication with the accumulator 5, the hydraulic pressure of the control port is high, the cartridge valve 81 is closed, when the reversing valve 82 is reset, the control port is in oil circuit communication with the second oil return pipe 41, the hydraulic pressure of the control port is reduced, and the cartridge valve 81 is opened. The reversing valve 82 is an electromagnetic reversing valve, and the electromagnetic reversing valve is externally connected with a boost amplifier, so that when the reversing valve 82 is in power-off reset, the electromagnetic coil in the reversing valve realizes quick demagnetization, the opening response of the cartridge valve 81 is improved, the oil in the energy accumulator 5 quickly enters the rod cavity of the hydraulic cylinder 1, and the closing response of the vacuum hydraulic valve 2 is further improved.
The energy storage device comprises an energy storage valve 91 and a pressure reducing valve 92, and the main pressure oil pipe 3, the pressure reducing valve 92, the energy storage valve 91 and the energy accumulator 5 are sequentially connected. The energy storage valve 91 is a one-way valve, controls the circulation of the pressure oil of the main pressure oil pipe 3, also prevents the pressure oil from flowing back, and when the energy storage valve 1 is opened, the pressure oil flows into the energy storage device 5, and the energy storage device 5 starts energy storage; when the energy storage valve 1 is closed, the pressure oil is cut off, and the energy storage device 5 stops energy storage. The pressure reducing valve 92 controls the hydraulic pressure of the accumulator 5 to be constant, ensuring that the accumulator 5 can stably store and release energy. In addition, in order to make the expansion of the accumulator 5 more stable and increase the service life, the accumulator 5 is further provided with a pressure sensor 61, and when the pressure of the accumulator 5 is detected to reach a set value, the control center controls the energy storage device to stop energy storage.
The accumulator 5 is connected to a relief valve 51, and the relief valve 51 is connected to the second oil return pipe 42. When the equipment is not used for a long time or needs to be overhauled by discharging oil, the oil in the oil way can be discharged through the pressure relief valve 51, and the pressure relief valve 51 is a manual valve and is not influenced by an on-off circuit.
The embodiment of the specification also provides a vacuumizing hydraulic control method, which adopts the vacuumizing hydraulic control system, and comprises the following steps:
S1, opening a vacuum hydraulic valve: the control center controls the hydraulic valve 7, the reversing valve 82, the energy storage valve 91 and the pressure reducing valve 92 to be opened, the cartridge valve 81 is closed, the main pressure oil pipe 3 is pressurized, pressure oil enters a rodless cavity of the hydraulic oil cylinder 1 through one hydraulic valve 7, oil in a rod cavity of the hydraulic oil cylinder 1 flows into the first oil return pipe 41 through the other hydraulic valve 7, hydraulic pressure between the rodless cavity and the rod cavity of the hydraulic oil cylinder 1 enables the piston rod 11 to extend, and a vacuumizing channel of the vacuum hydraulic valve 2 is opened; after receiving the signal triggered by the piston rod 11 from the switch detection sensor 62, the control center controls the hydraulic valve 7 to be closed, and the piston rod 11 stops moving;
S2, energy storage of an energy accumulator: the main pressure oil pipe 3 is pressurized, pressure oil enters the energy accumulator 5 through the pressure reducing valve 92 and the energy storage valve 91, and when the pressure sensor 61 detects that the pressure of the energy accumulator 5 reaches a set value, the control center controls the energy storage valve 91 to be closed;
S3, closing a vacuum hydraulic valve: after receiving the instruction of closing the vacuum hydraulic valve 2, the control center controls the reversing valve 82 to be closed, oil in a control port of the cartridge valve 81 flows into the second oil return pipe 42, the cartridge valve 81 is opened, pressure oil in the energy accumulator 5 enters a rod cavity of the hydraulic cylinder 1 through the cartridge valve 81, oil in a rodless cavity of the hydraulic cylinder 1 flows into the first oil return pipe 41, hydraulic pressure between the rod cavity and the rodless cavity of the hydraulic cylinder 1 enables the piston rod 11 to retract, and a vacuumizing channel of the vacuum hydraulic valve 2 is closed.
When the reversing valve 82 is closed, the opening of the cartridge valve 81 is not only based on the hydraulic pressure before the main oil port and the control port of the cartridge valve 81, but also can be actively pulled up by a spring built in the cartridge valve 81, so that the opening response of the cartridge valve 81 is improved.
While several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present description. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
The embodiments of the present specification have been described above, and the above description is illustrative, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. The utility model provides a vacuum hydraulic control system which characterized in that: the hydraulic oil cylinder comprises a hydraulic oil cylinder (1), a vacuum hydraulic valve (2), a main pressure oil pipe (3), a first oil return pipe (41), an energy accumulator (5), a control center, an energy storage device and an energy release device; the hydraulic oil cylinder is characterized in that a piston rod (11) of the hydraulic oil cylinder (1) is in telescopic connection with the vacuum hydraulic valve (2), a rodless cavity of the hydraulic oil cylinder (1) is connected with the main pressure oil pipe (3), a rod cavity of the hydraulic oil cylinder (1) is connected with the energy release device, the rodless cavity and the rod cavity of the hydraulic oil cylinder (1) are connected with the first oil return pipe (41), and hydraulic valves (7) are arranged on the rodless cavity oil pipe and the rod cavity oil pipe of the hydraulic oil cylinder (1); the main pressure oil pipe (3) is pressurized, the hydraulic valve (7) is opened, pressure oil enters a rodless cavity of the hydraulic oil cylinder (1), oil in the rod cavity of the hydraulic oil cylinder (1) enters the first oil return pipe (41), the hydraulic pressure of the rodless cavity of the hydraulic oil cylinder (1) is higher than that of the rod cavity, the piston rod (11) extends out, and the vacuum hydraulic valve (2) is opened; the energy accumulator (5) is respectively connected with the energy storage device and the energy discharging device, and the energy storage device is connected with the main pressure oil pipe (3); the main pressure oil pipe (3) is pressurized, the energy storage device is opened, the energy discharging device and the hydraulic valve (7) are closed, and pressure oil enters the energy accumulator (5) through the energy storage device to store energy; after the energy storage of the energy accumulator (5) is finished, the energy storage device is closed, the energy discharging device controls the energy accumulator (5) to discharge energy, pressure oil enters a rod cavity of the hydraulic oil cylinder (1), oil in a rodless cavity of the hydraulic oil cylinder (1) enters the first oil return pipe (41), the hydraulic pressure of the rod cavity of the hydraulic oil cylinder (1) is greater than that of the rodless cavity, the piston rod (11) is retracted, and the vacuum hydraulic valve (2) is closed; the control center controls the actions of the energy storage device and the energy release device and also controls the opening and closing of the hydraulic valve (7).
2. The vacuumizing hydraulic control system according to claim 1, wherein the energy release device comprises a cartridge valve (81), a reversing valve (82) and a second oil return pipe (42), wherein an input port and an output port of the cartridge valve (81) are respectively connected with the energy accumulator (5) and a rod cavity of the hydraulic cylinder (1), and a control port of the cartridge valve (81) is connected with the second oil return pipe (42) and the energy accumulator (5) through the reversing valve (82); when the reversing valve (82) is opened, pressure oil of the energy accumulator (5) flows into a control port of the cartridge valve (81) through the reversing valve (82), and the cartridge valve (81) is closed; when the reversing valve (82) is reset, oil at a control port of the cartridge valve (81) flows into the second oil return pipe (42), the cartridge valve (81) is opened, and pressure oil of the energy accumulator (5) flows into a rod cavity of the hydraulic oil cylinder (1) through the cartridge valve (81).
3. The vacuum hydraulic control system according to claim 1, wherein the energy storage device comprises an energy storage valve (91) and a pressure reducing valve (92), and the main pressure oil pipe (3), the pressure reducing valve (92), the energy storage valve (91) and the energy storage device (5) are connected in sequence.
4. A vacuum hydraulic control system according to claim 1, characterized in that the accumulator (5) is provided with a pressure sensor (61), and that the control centre controls the energy storage means to stop energy storage when it is detected that the pressure of the accumulator (5) has reached a set value.
5. A vacuum hydraulic control system according to claim 1, characterized in that the vacuum hydraulic valve (2) is provided with a switch detection sensor (62) for detecting the position of the piston rod (11), and when the switch detection sensor (62) is triggered by the piston rod (11), the control center controls the hydraulic valve (7) to be closed, and the hydraulic pressure of the rodless cavity and the rod-containing cavity of the hydraulic cylinder (1) is maintained, and the piston rod (11) stops.
6. The vacuumizing hydraulic control system according to claim 1, wherein a rod cavity of the hydraulic cylinder (1) is provided with a spring (12), and the direction of the spring (12) is the same as that of the piston rod (11); one end of the spring (12) is fixed on the inner wall of the hydraulic oil cylinder (1), and the other end of the spring is fixed on the base of the piston rod (11).
7. The vacuumizing hydraulic control system according to claim 1, wherein the hydraulic valve (7) is a double-channel valve core, and oil flows into the first oil return pipe (41) through two channels of the hydraulic valve (7) when the hydraulic oil cylinder (1) returns oil.
8. A vacuum hydraulic control system according to claim 2, characterized in that the accumulator (5) is connected with a relief valve (51), the relief valve (51) being connected with the second return line (42).
9. The vacuum hydraulic control method is realized by adopting a vacuum hydraulic control system, and the system comprises the following steps: the hydraulic oil cylinder (1), a vacuum hydraulic valve (2), a main pressure oil pipe (3), a first oil return pipe (41), a second oil return pipe (42), an energy accumulator (5), two hydraulic valves (7), a cartridge valve (81), a reversing valve (82), an energy storage valve (91), a pressure reducing valve (92) and a control center; a piston rod (11) of the hydraulic oil cylinder (1) is connected with the vacuum hydraulic valve (2), and a switch detection sensor (62) is arranged on the vacuum hydraulic valve (2); the rodless cavity and the rod cavity of the hydraulic oil cylinder (1) are respectively connected with the main pressure oil pipe (3) and the output oil port of the cartridge valve (81) through the hydraulic valve (7), and the rodless cavity and the rod cavity of the hydraulic oil cylinder (1) are also respectively connected with the first oil return pipe (41) through the hydraulic valve (7); an input oil port of the cartridge valve (81) is connected with the energy accumulator (5), and a control port of the cartridge valve (81) is connected with the energy accumulator (5) and the second oil return pipe (42) through the reversing valve (82); the main pressure oil pipe (3), the pressure reducing valve (92), the energy storage valve (91) and the energy accumulator (5) are sequentially connected, and the energy accumulator (5) is provided with a pressure sensor (61); the control center is used for receiving the instruction to control the opening and closing of each valve; the method is characterized by comprising the following steps:
The control center controls the hydraulic valve (7), the reversing valve (82), the energy storage valve (91) and the pressure reducing valve (92) to be opened, the cartridge valve (81) is closed, the main pressure oil pipe (3) is pressurized, pressure oil enters a rodless cavity of the hydraulic oil cylinder (1) through one hydraulic valve (7), oil in the rod cavity of the hydraulic oil cylinder (1) flows into the first oil return pipe (41) through the other hydraulic valve (7), the piston rod (11) is extended by hydraulic pressure between the rodless cavity and the rod cavity of the hydraulic oil cylinder (1), and a vacuumizing channel of the vacuum hydraulic valve (2) is opened;
The control center receives a signal triggered by the piston rod (11) by the switch detection sensor (62), and then controls the hydraulic valve (7) to be closed, and the piston rod (11) stops moving; the pressure oil enters the energy accumulator (5) through the pressure reducing valve (92) and the energy storage valve (91), and when the pressure sensor (61) detects that the pressure of the energy accumulator (5) reaches a set value, the control center controls the energy storage valve (91) to be closed;
After the control center receives an instruction of closing the vacuum hydraulic valve (2), the reversing valve (82) is controlled to be closed, oil at a control port of the cartridge valve (81) flows into the second oil return pipe (42), the cartridge valve (81) is opened, pressure oil in the energy accumulator (5) flows into a rod cavity of the hydraulic cylinder (1) through the cartridge valve (81), oil in a rodless cavity of the hydraulic cylinder (1) flows into the first oil return pipe (41), and hydraulic pressure between the rod cavity and the rodless cavity of the hydraulic cylinder (1) enables the piston rod (11) to retract, so that a vacuumizing channel of the vacuum hydraulic valve (2) is closed.
10. The method according to claim 9, wherein the reversing valve (82) is connected to a booster amplifier, so that the electromagnetic coil in the reversing valve (82) is rapidly demagnetized when the reversing valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410030533.8A CN117927519A (en) | 2024-01-09 | 2024-01-09 | Vacuumizing hydraulic control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410030533.8A CN117927519A (en) | 2024-01-09 | 2024-01-09 | Vacuumizing hydraulic control system and method |
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| Publication Number | Publication Date |
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| CN117927519A true CN117927519A (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410030533.8A Pending CN117927519A (en) | 2024-01-09 | 2024-01-09 | Vacuumizing hydraulic control system and method |
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| Country | Link |
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| CN (1) | CN117927519A (en) |
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