CN113290797A - High-efficient primary and secondary jar and hydraulic control system thereof - Google Patents
High-efficient primary and secondary jar and hydraulic control system thereof Download PDFInfo
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- CN113290797A CN113290797A CN202110554670.8A CN202110554670A CN113290797A CN 113290797 A CN113290797 A CN 113290797A CN 202110554670 A CN202110554670 A CN 202110554670A CN 113290797 A CN113290797 A CN 113290797A
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- 238000007789 sealing Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 abstract description 122
- 239000010720 hydraulic oil Substances 0.000 abstract description 11
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000012530 fluid Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/531—Drive means therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/82—Hydraulic or pneumatic circuits
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- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76775—Fluids
- B29C2945/76785—Fluids hydraulic fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76822—Phase or stage of control
- B29C2945/76859—Injection
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a high-efficiency primary-secondary cylinder and a hydraulic control system thereof, wherein the high-efficiency primary-secondary cylinder comprises a primary cylinder body, a secondary cylinder body and a piston rod; the top of the female cylinder body is at least provided with a female cylinder die assembly oil inlet and a differential oil inlet, and the bottom of the female cylinder body is provided with a die opening oil inlet; the sub-cylinder body is arranged in the main cylinder body in a sliding mode, and the lower end of the sub-cylinder body extends out of the cylinder body, so that a mold closing cavity and a mold opening cavity are formed in the main cylinder body; the upper end of the sub-cylinder body is provided with a die closing channel extending into the sub-cylinder body; the upper end of the piston rod is fixed on the main cylinder body, and the lower end of the piston rod extends into the die closing channel; the piston rod is of a hollow structure, and the upper end of the piston rod is provided with a sub-cylinder die assembly oil inlet; according to the invention, the female cylinder die-closing oil inlet is formed in the female cylinder body, so that a large amount of oil can be conveniently fed into the die-closing cavity, and meanwhile, hydraulic oil in the die-opening cavity can be guided into the die-closing cavity through the differential oil inlet, so that the die-closing speed is high, the working efficiency is improved, the output force is large, and the large-load situation can be met.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to a high-efficiency primary-secondary cylinder and a hydraulic control system thereof.
Background
The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion), has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, and is widely applied to hydraulic systems of various machines.
In the prior art, an injection cylinder, an injection device and an injection molding machine are disclosed as application No. 201720278974.5, wherein the injection cylinder includes a cylinder body, a cylinder cover and an injection piston, the injection piston can reciprocate in the cylinder body, so that the volume of an injection cavity defined by the injection piston, the cylinder cover and the cylinder body together is changed; the injection oil cylinder is further provided with a differential piston, wherein the injection piston is provided with an inner chamber, the differential piston is arranged inside the cylinder body, one end of the differential piston is inserted into the inner chamber, the differential piston is provided with a communication channel, the communication channel is in fluid communication with the inner chamber, so that a differential cavity is formed, and the differential cavity is in fluid communication with the injection cavity through a pipeline; the prior art adopts differential connection, so that the volume and the weight of a piston rod are reduced, and the manufacturing cost of the piston rod is reduced, but only oil is fed through a communicating channel, so that the mold closing speed is low, the working efficiency is greatly reduced, the output force is small, and the large-load situation cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-efficiency primary-secondary cylinder and a hydraulic control system thereof.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-efficiency primary and secondary cylinder comprises a primary cylinder body, a secondary cylinder body and a piston rod which are sequentially arranged from outside to inside; the top of the female cylinder body is at least provided with a female cylinder die assembly oil inlet and a differential oil inlet, and the bottom of the female cylinder body is provided with a die opening oil inlet; an oil filling valve is connected to the die closing oil inlet of the main cylinder; the full oil valve is provided with a full oil valve oil inlet for driving the full oil valve to open; the sub-cylinder body is arranged in the main cylinder body in a sliding mode, and the lower end of the sub-cylinder body extends out of the cylinder body, so that a mold closing cavity and a mold opening cavity are formed in the main cylinder body; the upper end of the sub-cylinder body is provided with a die closing channel extending into the sub-cylinder body; the upper end of the piston rod is fixed on the main cylinder body, and the lower end of the piston rod extends into the die closing channel; the piston rod is of a hollow structure, and the upper end of the piston rod is provided with a sub-cylinder die assembly oil inlet; and sealing parts are arranged at the joints of the sub-cylinder body, the main cylinder body and the piston rod.
Preferably, the master cylinder body comprises a cylinder body, an upper cover arranged at the top of the cylinder body and a lower cover arranged at the bottom of the cylinder body; the upper cover and the lower cover are fixedly connected with the cylinder body through bolts, and sealing parts are arranged at the connection parts; the female cylinder die assembly oil inlet, the differential oil inlet and the upper end of the piston rod are all arranged on the upper cover; the die sinking oil inlet is arranged on the lower cover.
A hydraulic control system of a high-efficiency primary-secondary cylinder comprises an oil tank, a pump, a primary cylinder three-position four-way electromagnetic directional valve, a secondary cylinder three-position four-way electromagnetic directional valve and a primary cylinder three-position four-way electromagnetic directional valve; the oil inlet end of the pump is connected with an oil tank; one channel at the upper end of the sub-cylinder three-position four-way electromagnetic reversing valve is connected with a sub-cylinder die assembly oil inlet, the other channel is connected with one channel at the lower end of the two-position four-way electromagnetic reversing valve, one channel at the lower end of the sub-cylinder three-position four-way electromagnetic reversing valve is connected with an oil outlet end of a pump, and the other channel is connected with an oil tank; one channel at the upper end of the two-position four-way electromagnetic reversing valve is connected with the die sinking oil inlet, and the other channel at the lower end of the two-position four-way electromagnetic reversing valve is connected with the differential oil inlet through a one-way valve; one channel at the upper end of the master cylinder three-position four-way electromagnetic reversing valve is connected with an oil inlet of the full oil valve, and the other channel is connected with a differential oil inlet through a pressure relief two-position two-way electromagnetic reversing valve; and one channel at the lower end of the master cylinder three-position four-way electromagnetic directional valve is connected with the oil outlet end of the pump, and the other channel is connected with the oil tank.
Preferably, a pressure-guide ratio counter balance valve is arranged between the channel at the upper end of the two-position four-way electromagnetic reversing valve and the die-opening two-position two-way electromagnetic reversing valve; and the control end of the pressure guide ratio counter-balance valve is arranged between the channel at the upper end of the sub-cylinder three-position four-way electromagnetic directional valve and the sub-cylinder die assembly oil inlet.
Preferably, a die opening two-position two-way electromagnetic reversing valve is further arranged between the channel at the upper end of the two-position four-way electromagnetic reversing valve and the die opening oil inlet.
Preferably, the two die opening two-position two-way electromagnetic directional valves are arranged in parallel.
Preferably, the differential oil inlet is provided with a first expansion oil port in parallel for connecting a pressure gauge or a pressure sensor.
Preferably, the sub-cylinder three-position four-way electromagnetic directional valve and the main cylinder three-position four-way electromagnetic directional valve are three-position four-way Y-shaped electromagnetic directional valves.
Preferably, the three-position four-way electromagnetic reversing valve is connected with the oil outlet end of the pump; two channels at the upper end of the three-position four-way electromagnetic directional valve are respectively provided with a second expansion oil port, one channel at the lower end of the three-position four-way electromagnetic directional valve is connected with the oil outlet end of the pump, and the other channel is connected with the oil tank.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, the female cylinder die-closing oil inlet is formed in the female cylinder body, so that the full oil valve can be conveniently opened to feed a large amount of oil into the die-closing cavity, and meanwhile, hydraulic oil in the die-opening cavity can be guided into the die-closing cavity through the differential oil inlet, so that the die-closing speed is high, the working efficiency is improved, the output force is large, and the large-load situation can be met;
2. according to the invention, through increasing the pressure guide ratio counter balance valve, the dead weight of equipment can be offset, so that an oil path can better control the oil cylinder to rapidly close the mold, the low pressure is reduced to stop, and the opening pressure is reduced by 3 to 1 when the mold opening cavity is opened, so that the service life of a rod diameter oil seal of the mold opening cavity can be better prolonged;
3. the invention can prevent the phenomenon of die falling caused by the aging of the internal spring of the pressure guide ratio counter valve due to the long-time work of the die opening two-position two-way electromagnetic directional valve by adding the die opening two-position two-way electromagnetic directional valve.
Drawings
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
FIG. 1 is a schematic structural diagram of a high-efficiency primary-secondary cylinder according to the invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
FIG. 4 is a hydraulic oil circuit diagram of the high-efficiency primary and secondary cylinders.
Wherein: 10. a master cylinder body; 11. a full oil valve; 12. an upper cover; 13. a cylinder body; 14. a lower cover; 15. a piston rod; 16. a sub-cylinder body; 17. closing the die cavity; 18. opening a die cavity; 19. a mold closing channel; 20. an oil tank; 21. a pump; 22. a sub-cylinder three-position four-way Y-shaped electromagnetic directional valve; 23. a two-position four-way electromagnetic directional valve; 24. a pressure-conducting ratio counter-balancing valve; 25. opening the two-position two-way electromagnetic directional valve; 26. a master cylinder three-position four-way Y-shaped electromagnetic directional valve; 27. a pressure relief two-position two-way electromagnetic directional valve; 28. a one-way valve; 29. three-position four-way electromagnetic directional valve.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
FIGS. 1-3 show the high-efficiency primary and secondary cylinders of the present invention, which comprises a primary cylinder 10, a secondary cylinder 16 and a piston rod 15, which are sequentially arranged from outside to inside; the top of the master cylinder body 10 is respectively provided with two master cylinder die assembly oil inlets E and two differential oil inlets C, and the bottom is provided with a die opening oil inlet G; an oil filling valve 11 is connected to the die closing oil inlet E of the master cylinder; the full-oil valve 11 is provided with a full-oil valve oil inlet F for driving the full-oil valve 11 to open; the sub-cylinder 16 is arranged in the main cylinder 10 in a sliding manner, and the lower end of the sub-cylinder extends out of the cylinder, so that a mold closing cavity 17 and a mold opening cavity 18 are formed in the main cylinder 10; the upper end of the sub-cylinder body 16 is provided with a mold closing channel 19 extending into the sub-cylinder body 16; the upper end of the piston rod 15 is fixed on the master cylinder body 10, and the lower end of the piston rod extends into the die closing channel 19; the piston rod 15 is of a hollow structure, and the upper end of the piston rod is provided with a sub-cylinder die assembly oil inlet D; sealing elements are arranged at the joints of the sub-cylinder body 16, the main cylinder body 10 and the piston rod 15; according to the invention, the female cylinder die-closing oil inlet E is arranged on the female cylinder body 10, so that the full oil valve 11 can be conveniently opened to feed a large amount of oil into the die-closing cavity 17, and meanwhile, hydraulic oil in the die-opening cavity 18 can be guided into the die-closing cavity 17 through the differential oil inlet C, so that the die-closing speed is high, the working efficiency is improved, the output force is large, and the requirement of a heavy-load situation can be met; the full oil valve 11 is a new type of full oil valve disclosed in the prior art, such as application No. 2019215634385, and therefore, the structure thereof will not be described in detail.
Further, the master cylinder body 10 comprises a cylinder body 13, an upper cover 12 arranged at the top of the cylinder body 13, and a lower cover 14 arranged at the bottom of the cylinder body 13; the upper cover 12 and the lower cover 14 are fixedly connected with the cylinder body 13 through bolts, and sealing parts are arranged at the joints; the female cylinder die assembly oil inlet E, the differential oil inlet C and the upper end of the piston rod 15 are all arranged on the upper cover 12; the die opening oil inlet G is arranged on the lower cover 14; according to the invention, the main cylinder body 10 is designed into a split structure, so that the processing and the assembly are convenient.
Fig. 4 is a hydraulic control system of a high-efficiency primary-secondary cylinder according to the present invention, which includes an oil tank 20, a pump 21, a primary-secondary cylinder three-position four-way Y-shaped electromagnetic directional valve 22, a two-position four-way electromagnetic directional valve 23, and a primary cylinder three-position four-way Y-shaped electromagnetic directional valve 26; the oil inlet end of the pump 21 is connected with the oil tank 20; one channel at the upper end of the sub-cylinder three-position four-way Y-shaped electromagnetic directional valve 22 is connected with a sub-cylinder die assembly oil inlet D, the other channel is connected with one channel at the lower end of the two-position four-way electromagnetic directional valve 23, one channel at the lower end of the sub-cylinder three-position four-way Y-shaped electromagnetic directional valve 22 is connected with an oil outlet end of the pump 21, and the other channel is connected with the oil tank 20; one channel at the upper end of the two-position four-way electromagnetic directional valve 23 is connected with the die sinking oil inlet G, and the other channel at the lower end of the two-position four-way electromagnetic directional valve is connected with the differential oil inlet C through the one-way valve 28; one channel at the upper end of the master cylinder three-position four-way Y-shaped electromagnetic directional valve 26 is connected with an oil inlet F of the full oil valve, and the other channel is connected with a differential oil inlet C through a pressure relief two-position two-way electromagnetic directional valve 27; one channel at the lower end of the master cylinder three-position four-way Y-shaped electromagnetic directional valve 26 is connected with the oil outlet end of the pump 21, and the other channel is connected with the oil tank 20; when die assembly is carried out: driven by an external controller, a pump 21 is started firstly, hydraulic oil is input into a system, then the left end of a sub-cylinder three-position four-way Y-shaped electromagnetic directional valve 22 is electrified (P is connected with A and B is connected with T), oil is fed into a die closing channel 19 through a sub-cylinder die closing oil inlet D, the left end of a main cylinder three-position four-way Y-shaped electromagnetic directional valve 26 is electrified (P is connected with A and B is connected with T), two full oil valves 11 are respectively opened through two full oil valve oil inlets F, a large amount of oil is fed into a die closing cavity 17, meanwhile, the two-position four-way electromagnetic directional valve 23 is electrified (P is connected with B and A is connected with T), hydraulic oil in a die opening cavity 18 enters the die closing cavity 17 through a one-way valve 28 and a differential oil inlet C, a sub-cylinder body 16 is pushed to move downwards, and die closing is completed; because the oil cylinder is large and the oil demand is large, more hydraulic oil can be obtained by guiding the hydraulic oil in the die opening cavity 18 into the die closing cavity 17, and the effect of higher die closing speed is achieved; when the die is closed in place, the right end of the three-position four-way Y-shaped electromagnetic reversing valve 26 of the master cylinder is electrified (P is connected with B, A is connected with T), the two full oil valves 11 are closed, and hydraulic oil enters the die closing cavity 17 through the differential oil inlet C to realize pressure maintaining; when pressure relief is needed, the master cylinder three-position four-way Y-shaped electromagnetic directional valve 26 is in a middle position when power is lost, and the pressure relief two-position two-way electromagnetic directional valve 27 is powered on at the same time; when the mold is opened: the hydraulic oil is input into the system by starting the pump 21 by driving of an external controller, then the right end of the sub-cylinder three-position four-way Y-shaped electromagnetic directional valve 22 is electrified (P is connected with B and A is connected with T), the hydraulic oil enters the die opening cavity 18 through the two-position four-way electromagnetic directional valve 23 and the die opening oil inlet G to push the sub-cylinder body 16 to move upwards, meanwhile, the left end of the main cylinder three-position four-way Y-shaped electromagnetic directional valve 26 is electrified (P is connected with A and B is connected with T), and the two full oil valves 11 are respectively opened through the two full oil valve oil inlets F, so that a large amount of oil returns from the die closing cavity 17 to the oil tank 20 to complete die closing.
Further, a pressure-guiding ratio counter balance valve 24 is arranged between the upper end channel of the two-position four-way electromagnetic directional valve 23 and the die opening two-position two-way electromagnetic directional valve 25; the control end of the pressure guide ratio counter-balance valve 24 is arranged between an upper end channel of the sub-cylinder three-position four-way Y-shaped electromagnetic directional valve 22 and a sub-cylinder die assembly oil inlet D: because the oil cylinder is bigger, the equipment is bigger, the dead weight of the equipment can be offset by the pressure guide ratio counter balance valve 24, the oil path can better control the oil cylinder to close the mould fast, the low pressure slows down to stop, the pressure guide ratio counter balance valve 24CB17A (3: 1) is increased, the traditional counter balance valve is not used, when the die cavity 18 is opened, the opening pressure is reduced by 3: 1, and the service life of the rod diameter oil seal of the die cavity 18 can be better prolonged.
Further, a die opening two-position two-way electromagnetic directional valve 25 is arranged between the upper end channel of the two-position four-way electromagnetic directional valve 23 and the die opening oil inlet G; because equipment is heavier, and the internal spring of counter valve CB17A is ageing easily under the equipment quiescent condition, and equipment exists the stripping phenomenon to can cause the mould to damage, personnel's safety problem, because the die sinking two-position two-way solenoid directional valve 25 is out of work, and the oil discharge is minimum, can play the auto-lock effect, thereby reaches under the equipment quiescent condition, the hydro-cylinder can not move, reaches the safe state, can effectively prevent personnel and the impaired of equipment.
Further, two die opening two-position two-way electromagnetic directional valves 25 are arranged and are arranged in parallel; the two-position four-way electromagnetic directional valve 23 adopts an electric control single check valve EP12W, and because the discharge capacity of the electric control single check valve EP12W is not enough, two electric control single check valves are connected in parallel, so that the discharge capacity of an oil way meets the requirement.
Further, the differential oil inlet C is provided with two first expansion oil ports H in parallel, and the two first expansion oil ports H are respectively used for connecting a pressure gauge and a pressure sensor; when in work: the pressure gauge is convenient for workers to read the pressure value of the oil pipe on site, and the pressure sensor is convenient for the workers to remotely read the pressure value of the oil pipe.
Further, the three-position four-way electromagnetic reversing valve 29 is connected with the oil outlet end of the pump 21; two channels at the upper end of the three-position four-way electromagnetic directional valve 29 are respectively provided with a second expansion oil port I, one channel at the lower end of the three-position four-way electromagnetic directional valve 29 is connected with the oil outlet end of the pump 21, and the other channel is connected with the oil tank 20; when in work: through increasing two second extension hydraulic fluid ports I to possess newly-increased function expansion ability.
The invention can achieve the situation that the mold closing speed is high, the oil circuit is not controlled because of the heavy inertia of the equipment when the mold closing device stops, the oil circuit can achieve the fast, stable and accurate situation, the equipment has good working performance, and the equipment does not work, and the equipment has better safety performance because of the oil blocking state of the mold opening cavity of the oil cylinder.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a high-efficient primary and secondary jar which characterized in that: comprises a main cylinder body, a sub cylinder body and a piston rod which are arranged from outside to inside in sequence;
the top of the female cylinder body is at least provided with a female cylinder die assembly oil inlet and a differential oil inlet, and the bottom of the female cylinder body is provided with a die opening oil inlet; an oil filling valve is connected to the die closing oil inlet of the main cylinder; the full oil valve is provided with a full oil valve oil inlet for driving the full oil valve to open;
the sub-cylinder body is arranged in the main cylinder body in a sliding mode, and the lower end of the sub-cylinder body extends out of the cylinder body, so that a mold closing cavity and a mold opening cavity are formed in the main cylinder body; the upper end of the sub-cylinder body is provided with a die closing channel extending into the sub-cylinder body;
the upper end of the piston rod is fixed on the main cylinder body, and the lower end of the piston rod extends into the die closing channel; the piston rod is of a hollow structure, and the upper end of the piston rod is provided with a sub-cylinder die assembly oil inlet;
and sealing parts are arranged at the joints of the sub-cylinder body, the main cylinder body and the piston rod.
2. The high efficiency master-slave cylinder according to claim 1, wherein: the master cylinder body comprises a cylinder body, an upper cover arranged at the top of the cylinder body and a lower cover arranged at the bottom of the cylinder body;
the upper cover and the lower cover are fixedly connected with the cylinder body through bolts, and sealing parts are arranged at the connection parts;
the female cylinder die assembly oil inlet, the differential oil inlet and the upper end of the piston rod are all arranged on the upper cover;
the die sinking oil inlet is arranged on the lower cover.
3. The hydraulic control system of a high-efficiency master-slave cylinder according to claim 1 or 2, characterized in that: the oil tank, the pump, the sub-cylinder three-position four-way electromagnetic directional valve, the two-position four-way electromagnetic directional valve and the main cylinder three-position four-way electromagnetic directional valve are included;
the oil inlet end of the pump is connected with an oil tank;
one channel at the upper end of the sub-cylinder three-position four-way electromagnetic reversing valve is connected with a sub-cylinder die assembly oil inlet, the other channel is connected with one channel at the lower end of the two-position four-way electromagnetic reversing valve, one channel at the lower end of the sub-cylinder three-position four-way electromagnetic reversing valve is connected with an oil outlet end of a pump, and the other channel is connected with an oil tank;
one channel at the upper end of the two-position four-way electromagnetic reversing valve is connected with the die sinking oil inlet, and the other channel at the lower end of the two-position four-way electromagnetic reversing valve is connected with the differential oil inlet through a one-way valve;
one channel at the upper end of the master cylinder three-position four-way electromagnetic reversing valve is connected with an oil inlet of the full oil valve, and the other channel is connected with a differential oil inlet through a pressure relief two-position two-way electromagnetic reversing valve; and one channel at the lower end of the master cylinder three-position four-way electromagnetic directional valve is connected with the oil outlet end of the pump, and the other channel is connected with the oil tank.
4. A hydraulic control system for a high efficiency master cylinder as claimed in claim 3, wherein: a pressure guide ratio counter-balancing valve is arranged between the channel at the upper end of the two-position four-way electromagnetic reversing valve and the die-opening two-position two-way electromagnetic reversing valve; and the control end of the pressure guide ratio counter-balance valve is arranged between the channel at the upper end of the sub-cylinder three-position four-way electromagnetic directional valve and the sub-cylinder die assembly oil inlet.
5. The hydraulic control system of a high efficiency master cylinder and slave cylinder as claimed in claim 4, wherein: and a die opening two-position two-way electromagnetic reversing valve is also arranged between the upper end channel of the two-position four-way electromagnetic reversing valve and the die opening oil inlet.
6. The hydraulic control system of a high efficiency master cylinder and slave cylinder as claimed in claim 5, wherein: the two die opening two-position two-way electromagnetic reversing valves are arranged in parallel.
7. The hydraulic control system of a high efficiency master cylinder and slave cylinder as claimed in claim 6, wherein: the differential oil inlet is connected with a first expansion oil port in parallel and is used for being connected with a pressure gauge or a pressure sensor.
8. The hydraulic control system of a high efficiency master cylinder and slave cylinder as claimed in claim 7, wherein: and the sub-cylinder three-position four-way electromagnetic reversing valve and the main cylinder three-position four-way electromagnetic reversing valve are three-position four-way Y-shaped electromagnetic reversing valves.
9. The hydraulic control system of a high efficiency master cylinder and slave cylinder as claimed in claim 8, wherein: the three-position four-way electromagnetic reversing valve is connected with the oil outlet end of the pump; two channels at the upper end of the three-position four-way electromagnetic directional valve are respectively provided with a second expansion oil port, one channel at the lower end of the three-position four-way electromagnetic directional valve is connected with the oil outlet end of the pump, and the other channel is connected with the oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110554670.8A CN113290797A (en) | 2021-05-21 | 2021-05-21 | High-efficient primary and secondary jar and hydraulic control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102748341A (en) * | 2012-06-19 | 2012-10-24 | 江苏金三力机械制造有限公司 | Quick cylinder hydraulic system |
| CN109989955A (en) * | 2019-04-30 | 2019-07-09 | 广东联城住工装备信息科技有限公司 | The hydraulic system of edge-on machine, edge-on machine and its control method |
| CN209444636U (en) * | 2019-01-18 | 2019-09-27 | 江苏国力锻压机床有限公司 | A kind of elaborate servo pump control hydraulic system |
| CN212202698U (en) * | 2020-05-19 | 2020-12-22 | 泉州市世创机械制造有限公司 | PVC (polyvinyl chloride) quick die assembly oil cylinder |
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- 2021-05-21 CN CN202110554670.8A patent/CN113290797A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748341A (en) * | 2012-06-19 | 2012-10-24 | 江苏金三力机械制造有限公司 | Quick cylinder hydraulic system |
| CN209444636U (en) * | 2019-01-18 | 2019-09-27 | 江苏国力锻压机床有限公司 | A kind of elaborate servo pump control hydraulic system |
| CN109989955A (en) * | 2019-04-30 | 2019-07-09 | 广东联城住工装备信息科技有限公司 | The hydraulic system of edge-on machine, edge-on machine and its control method |
| CN212202698U (en) * | 2020-05-19 | 2020-12-22 | 泉州市世创机械制造有限公司 | PVC (polyvinyl chloride) quick die assembly oil cylinder |
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Application publication date: 20210824 |