CN215927962U - Hydraulic control system for oil press - Google Patents
Hydraulic control system for oil press Download PDFInfo
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- CN215927962U CN215927962U CN202122500160.0U CN202122500160U CN215927962U CN 215927962 U CN215927962 U CN 215927962U CN 202122500160 U CN202122500160 U CN 202122500160U CN 215927962 U CN215927962 U CN 215927962U
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Abstract
The utility model discloses a hydraulic control system for an oil press, which comprises an oil tank, a motor, an oil pump set, a main cylinder and a top cylinder, wherein the oil tank is communicated with the oil pump set; the first oil path can enable the output end of the oil pump group to be connected with a piston cavity of the main cylinder, the second oil path can enable a column cavity of the main cylinder to be connected with the piston cavity of the main cylinder, the second oil path can also enable the column cavity of the main cylinder to be connected with an oil tank, the third oil path can enable the output end of the oil pump group to be connected with the piston cavity of the top cylinder, and the fourth oil path can enable the output end of the oil pump group to be connected with a rod cavity of the top cylinder; the first oil way, the second oil way, the third oil way and the fourth oil way all comprise cartridge valves. The utility model has simple structure and small loop resistance, the full differential connection can realize the no-load rapid operation of the main cylinder, and the oil circuit adopts the cartridge valve to improve the working reliability of the hydraulic control system.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic control system for an oil press.
Background
The hydraulic system functions to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely a power element, an actuator, a control element, an auxiliary element (attachment) and hydraulic oil.
The hydraulic system of the oil press is characterized in that the hydraulic press uses special hydraulic oil as a working medium, the hydraulic pump is used as a power source, the hydraulic oil enters an oil cylinder/piston through a hydraulic pipeline by the action force of the pump, then a plurality of groups of mutually matched sealing pieces are arranged in the oil cylinder/piston, the sealing at different positions are different, but the sealing effect is achieved, and the hydraulic oil cannot be leaked.
In the prior art, most hydraulic systems of oil press equipment adopt a slide valve control system, and the slide valve hydraulic control system has the disadvantages of complex structure, high failure rate, serious leakage, low efficiency and unreliable action.
Therefore, how to change the current situation that the hydraulic system of the hydraulic press device is unreliable in operation in the prior art becomes a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a hydraulic control system for an oil press, which solves the above problems of the prior art and improves the operational reliability of the hydraulic system of the oil press.
In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a hydraulic control system for an oil press, which comprises an oil tank, a motor, an oil pump set, a main cylinder and a top cylinder, wherein the oil tank is communicated with the oil pump set;
the first oil path can enable the output end of the oil pump group to be connected with the piston cavity of the main cylinder, the second oil path can enable the column cavity of the main cylinder to be connected with the piston cavity of the main cylinder, the second oil path can also enable the column cavity of the main cylinder to be connected with the oil tank, the third oil path can enable the output end of the oil pump group to be connected with the piston cavity of the top cylinder, and the fourth oil path can enable the output end of the oil pump group to be connected with the rod cavity of the top cylinder;
the first oil passage, the second oil passage, the third oil passage and the fourth oil passage all include cartridge valves.
Preferably, the first oil path comprises a first plug-in directional valve, a first check valve and a first plug-in overflow valve, an oil port a of the first plug-in directional valve is connected with an output end of the oil pump group, an oil port B of the first plug-in directional valve is connected with an inlet of the first check valve, and an outlet of the first check valve is connected with a piston cavity of the master cylinder; the first plug-in directional valve is connected with the first plug-in overflow valve in parallel, an oil port A of the first plug-in overflow valve is connected with the output end of the oil pump group, and an oil port B of the first plug-in overflow valve is connected with the oil tank;
the second oil way comprises a second plug-in directional valve and a second plug-in overflow valve, an oil port B of the second plug-in directional valve is connected with the column cavity of the main cylinder, an oil port A of the second plug-in directional valve is connected with an oil port A of the second plug-in overflow valve, an oil port B of the second plug-in overflow valve is connected with an oil port B of the first plug-in overflow valve, and the oil port B of the second plug-in overflow valve is also connected with the oil tank;
the third oil path comprises a third plug-in directional valve and a third plug-in overflow valve, an oil port A of the third plug-in directional valve is connected with the output end of the oil pump group, and an oil port B of the third plug-in directional valve is connected with a piston cavity of the jacking cylinder; an oil port A of the third plug-in overflow valve is connected with a piston cavity of the jacking cylinder, and an oil port B of the third plug-in overflow valve is connected with the oil tank;
the fourth oil path comprises a fourth plug-in directional valve and a fourth plug-in overflow valve, an oil port A of the fourth plug-in directional valve is connected with the output end of the oil pump group, and an oil port B of the fourth plug-in directional valve is connected with a rod cavity of the jacking cylinder; and an oil port A of the fourth plug-in overflow valve is connected with the rod cavity of the jacking cylinder, and an oil port B of the fourth plug-in overflow valve is connected with the oil tank.
Preferably, a fifth plug-in directional valve is further arranged between the first oil path and the second oil path, an oil port a of the fifth plug-in directional valve is connected with the first oil path, and an oil port B of the fifth plug-in directional valve is connected with the second oil path; and the piston cavity of the master cylinder is also connected with the oil tank by a second one-way valve.
Preferably, the first cartridge directional valve is connected with a first two-position four-way solenoid valve capable of controlling the working state thereof, the first cartridge overflow valve is connected with a first three-position four-way solenoid valve capable of controlling the working state thereof, the second cartridge directional valve is connected with a first two-position three-way solenoid valve capable of controlling the working state thereof, the second cartridge overflow valve is connected with a second three-position four-way solenoid valve capable of controlling the working state thereof, the third cartridge directional valve is connected with a third three-position four-way solenoid valve capable of controlling the working state thereof, the third three-position four-way solenoid valve is further connected with the fourth cartridge directional valve, the fifth cartridge directional valve is connected with a second two-position four-way solenoid valve capable of controlling the control state thereof, the second two-position four-way solenoid valve is further connected with the second one-way valve, and the first three-position four-way solenoid valve is connected with a first electromagnetic overflow valve, the second three-position four-way solenoid valve is connected with a second electromagnetic overflow valve, the third plug-in overflow valve is connected with a third electromagnetic overflow valve, and the fourth plug-in overflow valve is connected with a fourth electromagnetic overflow valve.
Preferably, the oil pump group comprises a first oil pump and a second oil pump which are connected in parallel, the first oil pump is connected with a first filter and a third one-way valve, and the second oil pump is connected with a second filter and a fourth one-way valve.
Preferably, the second oil pump is connected with a fifth plug-in overflow valve, an oil port a of the fifth plug-in overflow valve is connected with the second oil pump, an oil port B of the fifth plug-in overflow valve is connected with the oil tank, and the fifth plug-in overflow valve is connected with a third two-position four-way solenoid valve.
Preferably, the first oil path is connected with a pressure relay, and the piston cavity of the top cylinder and the oil pump set are both connected with pressure gauges.
Compared with the prior art, the utility model has the following technical effects: the utility model discloses a hydraulic control system for an oil press, which comprises an oil tank, a motor, an oil pump group, a main cylinder and a top cylinder, wherein the oil tank is communicated with the oil pump group; the first oil path can enable the output end of the oil pump group to be connected with a piston cavity of the main cylinder, the second oil path can enable a column cavity of the main cylinder to be connected with the piston cavity of the main cylinder, the second oil path can also enable the column cavity of the main cylinder to be connected with an oil tank, the third oil path can enable the output end of the oil pump group to be connected with the piston cavity of the top cylinder, and the fourth oil path can enable the output end of the oil pump group to be connected with a rod cavity of the top cylinder; the first oil way, the second oil way, the third oil way and the fourth oil way all comprise cartridge valves.
The hydraulic control system for the oil press is simple in structure and small in loop resistance, the second oil path can enable the column cavity of the main cylinder to be connected with the piston cavity of the main cylinder, the full differential connection can achieve idle-load rapid operation of the main cylinder, speed can be respectively regulated during working and feeding, the main cylinder can rapidly return during return, operation and control are accurate, simple and convenient, work is stable and reliable, high efficiency and energy consumption are achieved, the first oil path, the second oil path, the third oil path and the fourth oil path all comprise cartridge valves, and working reliability of the hydraulic control system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a hydraulic control system for an oil press according to the present invention;
wherein 1 is an oil tank, 2 is a main cylinder, 3 is a top cylinder, 4 is a first oil path, 5 is a second oil path, 6 is a third oil path, 7 is a fourth oil path, 8 is a first cartridge directional valve, 9 is a first check valve, 10 is a first cartridge overflow valve, 11 is a second cartridge directional valve, 12 is a second cartridge overflow valve, 13 is a third cartridge directional valve, 14 is a third cartridge overflow valve, 15 is a fourth cartridge directional valve, 16 is a fourth cartridge overflow valve, 17 is a fifth cartridge directional valve, 18 is a first two-position four-way solenoid valve, 19 is a first three-position four-way solenoid valve, 20 is a first two-position three-way solenoid valve, 21 is a second three-position four-way solenoid valve, 22 is a third three-position four-way solenoid valve, 23 is a second two-position four-way solenoid valve, 24 is a second check valve, 25 is a first electromagnetic overflow valve, 26 is a second electromagnetic overflow valve, 27 is a third electromagnetic overflow valve, 28 is a fourth electromagnetic overflow valve, reference numeral 29 denotes a first oil pump, 30 denotes a second oil pump, 31 denotes a first filter, 32 denotes a second filter, 33 denotes a third check valve, 34 denotes a fourth check valve, 35 denotes a fifth relief valve, 36 denotes a third two-position four-way solenoid valve, 37 denotes a pressure relay, and 38 denotes a pressure gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention is directed to a hydraulic control system for an oil press, which solves the above problems of the prior art and improves the operational reliability of the hydraulic system of the oil press.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic diagram of a hydraulic control system of an oil press according to the present invention.
The utility model provides a hydraulic control system for an oil press, which comprises an oil tank 1, a motor, an oil pump set, a main cylinder 2 and a top cylinder 3, wherein the oil tank 1 is communicated with the oil pump set, the motor is in transmission connection with the oil pump set, and the output end of the oil pump set is connected with a first oil way 4, a second oil way 5, a third oil way 6 and a fourth oil way 7; the first oil path 4 can connect the output end of the oil pump set with the piston cavity of the main cylinder 2, the second oil path 5 can connect the column cavity of the main cylinder 2 with the piston cavity of the main cylinder 2, the second oil path 5 can also connect the column cavity of the main cylinder 2 with the oil tank 1, the third oil path 6 can connect the output end of the oil pump set with the piston cavity of the top cylinder 3, and the fourth oil path 7 can connect the output end of the oil pump set with the rod cavity of the top cylinder 3; the first oil passage 4, the second oil passage 5, the third oil passage 6, and the fourth oil passage 7 each include a cartridge valve.
The hydraulic control system for the oil press is simple in structure and small in loop resistance, the second oil path 5 can enable the column cavity of the main cylinder 2 to be connected with the piston cavity of the main cylinder 2, the full differential connection can achieve idle-load rapid operation of the main cylinder 2, speed regulation control can be achieved during working, the main cylinder 2 can return quickly during return, operation control is accurate, simple and convenient, working is stable and reliable, high efficiency and energy consumption are achieved, and the first oil path 4, the second oil path 5, the third oil path 6 and the fourth oil path 7 comprise cartridge valves, so that working reliability of the hydraulic control system is improved.
The first oil way 4 comprises a first plug-in directional valve 8, a first check valve 9 and a first plug-in overflow valve 10, an oil port A of the first plug-in directional valve 8 is connected with an output end of the oil pump set, an oil port B of the first plug-in directional valve 8 is connected with an inlet of the first check valve 9, and an outlet of the first check valve 9 is connected with a piston cavity of the main cylinder 2; the first plug-in directional valve 8 is connected with the first plug-in overflow valve 10 in parallel, an oil port A of the first plug-in overflow valve 10 is connected with the output end of the oil pump group, and an oil port B of the first plug-in overflow valve 10 is connected with the oil tank 1;
the second oil path 5 comprises a second plug-in directional valve 11 and a second plug-in overflow valve 12, an oil port B of the second plug-in directional valve 11 is connected with a column cavity of the main cylinder 2, an oil port A of the second plug-in directional valve 11 is connected with an oil port A of the second plug-in overflow valve 12, an oil port B of the second plug-in overflow valve 12 is connected with an oil port B of the first plug-in overflow valve 10, and an oil port B of the second plug-in overflow valve 12 is also connected with the oil tank 1;
the third oil path 6 comprises a third plug-in directional valve 13 and a third plug-in overflow valve 14, an oil port A of the third plug-in directional valve 13 is connected with the output end of the oil pump group, and an oil port B of the third plug-in directional valve 13 is connected with a piston cavity of the jacking cylinder 3; an oil port A of the third plug-in overflow valve 14 is connected with a piston cavity of the top cylinder 3, and an oil port B of the third plug-in overflow valve 14 is connected with the oil tank 1;
the fourth oil path 7 comprises a fourth plug-in directional valve 15 and a fourth plug-in overflow valve 16, an oil port A of the fourth plug-in directional valve 15 is connected with the output end of the oil pump group, and an oil port B of the fourth plug-in directional valve 15 is connected with a rod cavity of the jacking cylinder 3; an oil port A of the fourth plug-in overflow valve 16 is connected with the rod cavity of the jacking cylinder 3, and an oil port B of the fourth plug-in overflow valve 16 is connected with the oil tank 1.
A fifth plug-in directional valve 17 is further arranged between the first oil way 4 and the second oil way 5, an oil port A of the fifth plug-in directional valve 17 is connected with the first oil way 4, and an oil port B of the fifth plug-in directional valve 17 is connected with the second oil way 5; the piston chamber of the master cylinder 2 is also connected to the oil tank 1 by means of a second check valve 24.
The first cartridge directional valve 8 is connected with a first two-position four-way electromagnetic valve 18 capable of controlling the working state thereof, the first cartridge overflow valve 10 is connected with a first three-position four-way electromagnetic valve 19 capable of controlling the working state thereof, the second cartridge directional valve 11 is connected with a first two-position three-way electromagnetic valve 20 capable of controlling the working state thereof, the second cartridge overflow valve 12 is connected with a second three-position four-way electromagnetic valve 21 capable of controlling the working state thereof, the third cartridge directional valve 13 is connected with a third three-position four-way electromagnetic valve 22 capable of controlling the working state thereof, the third three-position four-way electromagnetic valve 22 is further connected with the fourth cartridge directional valve 15, the fifth cartridge directional valve 17 is connected with a second two-position four-way electromagnetic valve 23 capable of controlling the control state thereof, the second two-position four-way electromagnetic valve 23 is further connected with a second one-way valve 24, the first three-position four-way electromagnetic valve 19 is connected with a first electromagnetic overflow valve 25, the second three-position four-way solenoid valve 21 is connected to a second electromagnetic spill valve 26, the third relief valve 14 is connected to a third electromagnetic spill valve 27, and the fourth relief valve 16 is connected to a fourth electromagnetic spill valve 28.
The oil pump group comprises a first oil pump 29 and a second oil pump 30 which are connected in parallel, the first oil pump 29 is connected with a first filter 31 and a third one-way valve 33, and the second oil pump 30 is connected with a second filter 32 and a fourth one-way valve 34.
The second oil pump 30 is connected with a fifth cartridge overflow valve 35, a port a of the fifth cartridge overflow valve 35 is connected with the second oil pump 30, a port B of the fifth cartridge overflow valve 35 is connected with the oil tank 1, and the fifth cartridge overflow valve 35 is connected with a third two-position four-way solenoid valve 36.
The first oil path 4 is connected with a pressure relay 37, and the piston cavity of the top cylinder 3 and the oil pump group are both connected with a pressure gauge 38.
The hydraulic control system for the oil press disclosed by the utility model has the working process as follows:
and in the quick-falling process of the master cylinder 2, the electromagnets YV1, the electromagnets YV4, the electromagnets YV5, the electromagnets YV9 and the electromagnets YV10 are powered on, a given pressure is set for the third electromagnetic overflow valve 27, a certain pressure is kept in an oil inlet main pipeline of a hydraulic system, a motor is started, oil passes through the first oil pump 29, the second oil pump 30, the first filter 31, the second filter 32, the third check valve 33 and the fourth check valve 34, then the pressure oil enters a piston cavity of the master cylinder 2 through the first plug-in directional valve 8, meanwhile, the oil in a rod cavity of the master cylinder 2 returns to the piston cavity of the master cylinder 2 through the second plug-in directional valve 11 and the second plug-in overflow valve 12, a differential circuit is realized, and the quick-falling process of the master cylinder 2 is completed.
When a pressure rod of the master cylinder 2 moves to a set position, the electromagnet YV3 is electrified, the electromagnet YV4 is de-electrified, a given pressure of the third electromagnetic overflow valve 27 is set, a certain pressure is kept in an oil inlet main pipeline of a hydraulic system, a motor is started, oil passes through the first oil pump 29, the second oil pump 30, the first filter 31, the second filter 32, the third check valve 33 and the fourth check valve 34, then pressure oil enters a piston cavity of the master cylinder 2 through the first plug-in directional valve 8, and meanwhile the oil in a rod cavity of the master cylinder 2 returns to the oil tank 1 through the second plug-in directional valve 11 and the second plug-in overflow valve 12, so that the slow descending process of the master cylinder 2 is completed.
And in the master cylinder 2 pressure maintaining process, all the electromagnetic valves are powered off, the pressure is kept constant, and the master cylinder 2 pressure maintaining is completed.
And in the master cylinder 2 pressure relief process, the electromagnet YV2, the electromagnet YV3 and the electromagnet YV6 are electrified, oil passes through the first three-position four-way electromagnetic valve 19, the second three-position four-way electromagnetic valve 21 and the second two-position four-way electromagnetic valve 23, and the system pressure is relieved after the oil passes through the first electromagnetic overflow valve 25 and the second electromagnetic overflow valve 26, so that the master cylinder 2 pressure relief process is completed.
And in the master cylinder 2 return process, the electromagnets YV1, YV6 and YV10 are powered on, the given pressure of the third electromagnetic overflow valve 27 is set, the oil inlet main pipeline of the hydraulic system is kept at a certain pressure, the motor is started, the oil passes through the first oil pump 29, the second oil pump 30, the first filter 31, the second filter 32, the third check valve 33 and the fourth check valve 34, the electromagnet YV1 is powered on at the moment, the first plug-in directional valve 8 is closed, then the pressure oil passes through the fifth plug-in directional valve 17, the second check valve 24 is opened, the oil in the piston cavity of the master cylinder 2 directly returns to the oil tank 1, and the master cylinder 2 return process is completed.
The ejection process of the top cylinder 3 comprises the steps that an electromagnet YV1, an electromagnet YV7 and an electromagnet YV10 are powered on, the electromagnet YV10 is powered on to enable an oil inlet main pipeline of a hydraulic system to keep certain pressure, at the moment, the electromagnet YV1 is powered on, then a first two-position four-way electromagnetic valve 18 is used for closing a first plug-in directional valve 8, and pressure oil is prevented from entering a piston cavity of a main cylinder 2; when the electromagnet YV7 is electrified, the third cartridge overflow valve 14 is utilized to open the third cartridge directional valve 13, and at the moment, pressure oil enters the piston cavity of the top cylinder 3 to complete the ejection process of the top cylinder 3.
The top cylinder 3 returns to the working procedure, the electromagnet YV1, the electromagnet YV8 and the electromagnet YV10 are electrified, the electromagnet YV10 is electrified to enable the oil inlet main pipeline of the hydraulic system to keep certain pressure, the electromagnet YV1 is electrified, the first two-position four-way electromagnetic valve 18 is utilized to close the first plug-in directional valve 8, and pressure oil is not enabled to enter the piston cavity of the main cylinder 2; the electromagnet YV8 is electrified, so that the third plug-in directional valve 13 is closed, pressure oil does not enter the piston cavity of the top cylinder 3, meanwhile, the fourth plug-in directional valve 15 is opened, the pressure oil enters the rod cavity of the top cylinder 3 at the moment, the piston cavity hydraulic oil of the top cylinder 3 returns to the oil tank 1, and the top cylinder 3 returning process is completed.
The hydraulic control system for the oil press has the advantages of simple structure, small loop resistance, realization of no-load rapid operation of the main cylinder 2 through complete differential connection, respective speed regulation control during working and feeding, rapid return of the main cylinder 2 during return, accurate, simple and convenient operation control, stable and reliable work, high efficiency, energy consumption saving, equipment cost reduction and high integration level.
The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (7)
1. A hydraulic control system for an oil press, characterized by: the oil pump set comprises an oil tank, a motor, an oil pump set, a main cylinder and a jacking cylinder, wherein the oil tank is communicated with the oil pump set, the motor is in transmission connection with the oil pump set, and the output end of the oil pump set is connected with a first oil path, a second oil path, a third oil path and a fourth oil path;
the first oil path can enable the output end of the oil pump group to be connected with the piston cavity of the main cylinder, the second oil path can enable the column cavity of the main cylinder to be connected with the piston cavity of the main cylinder, the second oil path can also enable the column cavity of the main cylinder to be connected with the oil tank, the third oil path can enable the output end of the oil pump group to be connected with the piston cavity of the top cylinder, and the fourth oil path can enable the output end of the oil pump group to be connected with the rod cavity of the top cylinder;
the first oil passage, the second oil passage, the third oil passage and the fourth oil passage all include cartridge valves.
2. The hydraulic control system for an oil press as set forth in claim 1, wherein: the first oil way comprises a first plug-in directional valve, a first one-way valve and a first plug-in overflow valve, an oil port A of the first plug-in directional valve is connected with the output end of the oil pump group, an oil port B of the first plug-in directional valve is connected with an inlet of the first one-way valve, and an outlet of the first one-way valve is connected with a piston cavity of the main cylinder; the first plug-in directional valve is connected with the first plug-in overflow valve in parallel, an oil port A of the first plug-in overflow valve is connected with the output end of the oil pump group, and an oil port B of the first plug-in overflow valve is connected with the oil tank;
the second oil way comprises a second plug-in directional valve and a second plug-in overflow valve, an oil port B of the second plug-in directional valve is connected with the column cavity of the main cylinder, an oil port A of the second plug-in directional valve is connected with an oil port A of the second plug-in overflow valve, an oil port B of the second plug-in overflow valve is connected with an oil port B of the first plug-in overflow valve, and the oil port B of the second plug-in overflow valve is also connected with the oil tank;
the third oil path comprises a third plug-in directional valve and a third plug-in overflow valve, an oil port A of the third plug-in directional valve is connected with the output end of the oil pump group, and an oil port B of the third plug-in directional valve is connected with a piston cavity of the jacking cylinder; an oil port A of the third plug-in overflow valve is connected with a piston cavity of the jacking cylinder, and an oil port B of the third plug-in overflow valve is connected with the oil tank;
the fourth oil path comprises a fourth plug-in directional valve and a fourth plug-in overflow valve, an oil port A of the fourth plug-in directional valve is connected with the output end of the oil pump group, and an oil port B of the fourth plug-in directional valve is connected with a rod cavity of the jacking cylinder; and an oil port A of the fourth plug-in overflow valve is connected with the rod cavity of the jacking cylinder, and an oil port B of the fourth plug-in overflow valve is connected with the oil tank.
3. The hydraulic control system for an oil press as set forth in claim 2, wherein: a fifth plug-in directional valve is further arranged between the first oil way and the second oil way, an oil port A of the fifth plug-in directional valve is connected with the first oil way, and an oil port B of the fifth plug-in directional valve is connected with the second oil way; and the piston cavity of the master cylinder is also connected with the oil tank by a second one-way valve.
4. The hydraulic control system for an oil press as set forth in claim 3, wherein: the first plug-in direction valve is connected with a first two-position four-way electromagnetic valve capable of controlling the working state of the first plug-in overflow valve, the first plug-in overflow valve is connected with a first three-position four-way electromagnetic valve capable of controlling the working state of the first plug-in overflow valve, the second plug-in overflow valve is connected with a second three-position four-way electromagnetic valve capable of controlling the working state of the second plug-in overflow valve, the third plug-in direction valve is connected with a third three-position four-way electromagnetic valve capable of controlling the working state of the third plug-in direction valve, the third three-position four-way electromagnetic valve is also connected with the fourth plug-in direction valve, the fifth plug-in direction valve is connected with a second two-position four-way electromagnetic valve capable of controlling the control state of the fifth plug-in direction valve, the second two-position four-way electromagnetic valve is also connected with the second one-way valve, and the first three-position four-way electromagnetic valve is connected with a first electromagnetic overflow valve, the second three-position four-way solenoid valve is connected with a second electromagnetic overflow valve, the third plug-in overflow valve is connected with a third electromagnetic overflow valve, and the fourth plug-in overflow valve is connected with a fourth electromagnetic overflow valve.
5. The hydraulic control system for an oil press as set forth in claim 4, wherein: the oil pump group comprises a first oil pump and a second oil pump which are connected in parallel, the first oil pump is connected with a first filter and a third one-way valve, and the second oil pump is connected with a second filter and a fourth one-way valve.
6. The hydraulic control system for an oil press as set forth in claim 5, wherein: the second oil pump is connected with a fifth plug-in overflow valve, an oil port A of the fifth plug-in overflow valve is connected with the second oil pump, an oil port B of the fifth plug-in overflow valve is connected with the oil tank, and the fifth plug-in overflow valve is connected with a third two-position four-way electromagnetic valve.
7. The hydraulic control system for an oil press as set forth in claim 1, wherein: the first oil path is connected with a pressure relay, and the piston cavity of the top cylinder and the oil pump set are connected with pressure gauges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122500160.0U CN215927962U (en) | 2021-10-18 | 2021-10-18 | Hydraulic control system for oil press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122500160.0U CN215927962U (en) | 2021-10-18 | 2021-10-18 | Hydraulic control system for oil press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215927962U true CN215927962U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122500160.0U Active CN215927962U (en) | 2021-10-18 | 2021-10-18 | Hydraulic control system for oil press |
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| Country | Link |
|---|---|
| CN (1) | CN215927962U (en) |
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2021
- 2021-10-18 CN CN202122500160.0U patent/CN215927962U/en active Active
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