CN212888806U - Injection plug-in mounting hydraulic control system - Google Patents
Injection plug-in mounting hydraulic control system Download PDFInfo
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- CN212888806U CN212888806U CN202021566545.6U CN202021566545U CN212888806U CN 212888806 U CN212888806 U CN 212888806U CN 202021566545 U CN202021566545 U CN 202021566545U CN 212888806 U CN212888806 U CN 212888806U
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Abstract
The utility model relates to a hydraulic control technical field specifically discloses injection cartridge hydraulic control system, including the oil pump, the pneumatic cylinder, hydraulic motor and oil tank, the pneumatic cylinder includes the hydraulic fluid port that advances and returns the hydraulic fluid port, still include first cartridge valve, the second cartridge valve, the third cartridge valve, the fourth cartridge valve, double-end solenoid valve and single-end solenoid valve, the P end of oil pump connects fourth cartridge valve and second cartridge valve, double-end solenoid valve controls first cartridge valve and second cartridge valve, first cartridge valve A hole and the A hole of second cartridge valve all are connected with the hydraulic fluid port, the B hole of first cartridge valve is connected with the oil tank, the A hole of third cartridge valve with advance the hydraulic fluid port and be connected, and the B hole of third cartridge valve with return the hydraulic fluid port and be connected, the A hole of third cartridge valve with advance the hydraulic fluid port and be connected; adopt the technical scheme in this patent can guarantee the quick advance and retreat of pneumatic cylinder, accomplish quick injection and take out the glue, can reduce the cost input again.
Description
Technical Field
The utility model relates to a hydraulic control technical field, in particular to injection cartridge hydraulic control system.
Background
In the existing injection molding machine, two control systems of the hydraulic cylinder are commonly used, one is a full-plug-in valve type system, the system needs four plug-in valves and two pilot type electromagnetic valves to control the advance and retreat of the hydraulic cylinder, and the plug-in of the hydraulic motor is controlled in the system, so that the plug-in quantity is large, the cost is high, the occupied area is large, and the production difficulty of a hydraulic valve block is improved; the other type of the hydraulic cylinder is a slide valve system which is used on a small-sized machine, although the slide valve system uses a few plug-ins, the oil passages of the slide valve system are correspondingly reduced, the reaction speed of controlling the advance and retreat of the hydraulic cylinder is low, and based on the slide valve system, the slide valve system is designed to ensure the quick advance and retreat of the hydraulic cylinder, complete quick injection and glue extraction and reduce the cost investment.
SUMMERY OF THE UTILITY MODEL
The utility model provides an injection cartridge hydraulic control system can guarantee the quick advance and retreat of pneumatic cylinder, accomplishes quick injection and takes out the glue, can reduce the cost input again.
In order to achieve the above purpose, the technical scheme of the utility model is that:
the injection cartridge hydraulic control system comprises an oil pump, a hydraulic cylinder, a hydraulic motor and an oil tank, wherein the hydraulic cylinder comprises a front oil inlet and a back oil inlet, and further comprises a first cartridge valve, a second cartridge valve, a third cartridge valve, a fourth cartridge valve, a double-head solenoid valve and a single-head solenoid valve, wherein the first cartridge valve, the second cartridge valve and the fourth cartridge valve are two-way directional cartridge valves, the third cartridge valve is a two-way pressure type cartridge valve, the P end of the oil pump is connected with the fourth cartridge valve and the second cartridge valve, the single-head solenoid valve controls the fourth cartridge valve, and the single-head solenoid valve, the fourth cartridge valve and the hydraulic motor form a feeding oil circuit unit to finish feeding;
the double-head electromagnetic valve controls the first cartridge valve and the second cartridge valve, the hole A of the first cartridge valve and the hole A of the second cartridge valve are connected with a backspacing oil port, the hole B of the first cartridge valve is connected with an oil tank, the hole A of the third cartridge valve is connected with a forward oil port of the hydraulic cylinder, the hole B of the third cartridge valve is connected with a backspacing oil port of the hydraulic cylinder, the first cartridge valve and the second cartridge valve are opened to form an injection oil path unit, a piston of the hydraulic cylinder is controlled to move forward, and when the second cartridge valve and the third cartridge valve are opened, a backspacing oil path unit is formed and the piston of the hydraulic cylinder is controlled to move backward.
The technical principle and the effect of the technical scheme are as follows:
1. the theory of operation of reinforced oil circuit unit does in this scheme: the oil pump work is with highly compressed hydraulic oil pump to the oil feed end of fourth cartridge valve, and the single-end solenoid valve circular telegram this moment (BP of single-end solenoid valve is to the intercommunication), and the oil pressure of fourth cartridge valve control end unloads to hydraulic motor through the single-end solenoid valve like this, and the case of fourth cartridge valve is opened, and hydraulic oil enters into hydraulic motor from the AB hole of fourth cartridge valve to drive hydraulic motor and rotate, accomplish and feed in raw material.
2. The working principle of the injection oil way unit in the scheme is as follows: double-end solenoid valve right side circular telegram, the high-pressure hydraulic oil that oil pump P end was carried removes the B hole to the second cartridge valve, when double-end solenoid valve does not give the electricity, hydraulic oil can't pass through double-end solenoid valve, consequently can die the case of second cartridge valve, and the double-end solenoid valve right side circular telegram is closed back, the oil pressure of second cartridge valve control end is unloaded, the case is opened, hydraulic oil enters into there is the pole chamber from the hydraulic fluid port that advances of AB hole and the pneumatic cylinder of second cartridge valve, thereby promote piston and screw rod and advance, penetrate and glue the action.
In addition, hydraulic oil discharged from the oil return port can also pass through the holes A to B of the third cartridge valve, and the valve core of the third cartridge valve is opened at the moment, so that the hydraulic oil can return to the front oil inlet of the hydraulic cylinder again through the third cartridge valve, a differential oil path is formed, the flow rate of the hydraulic oil in the rod cavity is accelerated, and the glue injection action is quickly completed.
3. The working principle of the oil return unit in the scheme is as follows: when the glue injection action is finished and the screw needs to retract, the double-end electromagnetic valve is powered, and hydraulic oil enters a rodless cavity of the hydraulic cylinder after passing through the double-end electromagnetic valve, so that the piston and the screw are pushed to retract; because the case of third cartridge valve is in the state of opening at this moment, therefore some hydraulic oil still can enter into the pole chamber of pneumatic cylinder from third cartridge valve, because the atress area of piston in pole chamber one side will be less than no pole chamber one side, based on pressure notate F ═ PS, the atress of piston in no pole chamber one side is greater than there being pole chamber one side, because the piston in the pneumatic cylinder still can retreat.
In addition, in the piston returning process, hydraulic oil in the rod cavity is discharged, the discharged hydraulic oil can return to the oil tank through the third cartridge valve through the first cartridge valve, and partial return oil can enter the rodless cavity through the returning oil port due to the fact that the hole B of the third cartridge valve is connected with the returning oil port, so that a differential loop is formed, namely the hydraulic oil in the rod cavity does not completely return to the oil tank, but partially enters the rodless cavity, and the piston and the screw can return faster.
4. In the scheme, the advancing and retreating actions of the hydraulic cylinder are realized only by matching three cartridge valves (a first cartridge valve, a second cartridge valve and a third cartridge valve) with one pilot-operated solenoid valve, and compared with a traditional full-cartridge valve system (which can be completed by four cartridge valves), the use amount of the cartridge valves is reduced, the cost is reduced, and the occupied area of a control system is also reduced; compared with a slide valve system for a small machine type, the slide valve system has the advantages that the hydraulic oil channel is larger in performance, and the injection and glue extraction speed is improved.
Further, the device also comprises a pressure backup valve, and the pressure backup valve is electrically connected with the single-head electromagnetic valve.
Has the advantages that: because hydraulic motor drives the screw rod and rotates when reinforced forward, can receive the reaction force and roll back, and when rolling back, have the hydraulic oil of pole intracavity to release, consequently just set up a pressure-backup valve, guarantee that the oil pressure in the system is in stable state.
Drawings
Fig. 1 is a working schematic diagram of an embodiment of the injection cartridge hydraulic control system of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the hydraulic system comprises a hydraulic cylinder 1, a hydraulic motor 2, a first cartridge valve 3, a second cartridge valve 4, a third cartridge valve 5, a fourth cartridge valve 6, a single-head electromagnetic valve 7, a double-head electromagnetic valve 8, a one-way valve 9 and a pressure-backup valve 10.
Embodiments are substantially as shown in the drawings: in fig. 1, the broken line indicates the direction of the control oil, the solid line indicates the direction of the hydraulic oil, and in the embodiment, the retraction finger moves to the right, and the forward finger moves to the left.
An injection cartridge hydraulic control system comprises an oil pump (P in the figure), an oil tank (T in the figure), a hydraulic cylinder 1, a hydraulic motor 2, four cartridge valves and two pilot type electromagnetic valves, wherein the four cartridge valves comprise a first cartridge valve 3, a second cartridge valve 4, a third cartridge valve 5 and a fourth cartridge valve 6, the first cartridge valve, the second cartridge valve and the fourth cartridge valve are all two-way directional cartridge valves, the third cartridge valve is a pressure type cartridge valve, and the two pilot type electromagnetic valves comprise a double-head electromagnetic valve 8 and a single-head electromagnetic valve 7.
The injection of screw rod is accomplished in the process of advancing and returning back of piston in pneumatic cylinder 1, and pneumatic cylinder 1 is including advancing the hydraulic fluid port and returning back the hydraulic fluid port, and wherein advance the hydraulic fluid port and have the pole chamber intercommunication, return the hydraulic fluid port and have the pole chamber intercommunication, and hydraulic motor 2 is connected with the piston rod.
As is known in the art, two-way pressure cartridge valves each include a valve spool, a control port X located above the valve spool, and an A port and a B port located below the valve spool.
Above-mentioned component has constituted injection oil circuit unit, has rolled back oil circuit unit and reinforced oil circuit unit in this scheme, and wherein reinforced oil circuit unit's specific connected mode is: the fourth cartridge valve 6 is connected to the end of producing oil (P end) of oil pump, and the hydraulic oil that the P end came out gets into fourth cartridge valve 6 promptly, and the control end electricity of fourth cartridge valve 6 is connected with single-end solenoid valve 7, and the B hole and the hydraulic motor 2 of fourth cartridge valve 6 are connected, and the PB of single-end solenoid valve 7 is also connected with hydraulic motor 2, and hydraulic motor 2's oil return intercommunication oil tank, and fourth cartridge valve 6 has constituted reinforced oil circuit unit with single-end solenoid valve 7 promptly.
The working principle of the charging oil circuit unit is as follows: the oil pump work is with highly compressed hydraulic oil pump to the oil feed end of fourth cartridge valve 6, single solenoid valve 7 circular telegram this moment (promptly single solenoid valve 7's BP is to the intercommunication), and the oil pressure of the 6 control ends of fourth cartridge valve unloads to hydraulic motor 2 through single solenoid valve 7 like this, and the case of fourth cartridge valve 6 is opened, and hydraulic oil enters into hydraulic motor 2 from the AB hole of fourth cartridge valve 6 to drive hydraulic motor 2 and rotate, accomplish and feed in raw material.
The second cartridge valve 4 is connected to the play oil end (P end) of oil pump, double-end solenoid valve 8 is connected to the control end electricity of second cartridge valve 4 and first cartridge valve 3, second cartridge valve 4 is controlled to the right-hand member of double-end solenoid valve 8, first cartridge valve 3 is controlled to the left end of double-end solenoid valve 8, the right-hand member of double-end solenoid valve 8 is connected with the hydraulic cylinder 1's hydraulic fluid port that advances, and be connected with check valve 9 between the two, the A hole of second cartridge valve 4 is connected with the hydraulic cylinder 1's hydraulic fluid port that backs, the X mouth and A hole or B hole intercommunication of second cartridge valve 4, communicate with B hole in this embodiment.
A backspacing oil port of the hydraulic cylinder 1 is connected with a control end and a hole A of the first cartridge valve 3, and a hole B of the first cartridge valve 3 is connected with an oil tank.
A backspacing oil port of the hydraulic cylinder 1 is connected with a hole B of the third cartridge valve 5, and a hole A of the third cartridge valve 5 is communicated with a front advancing oil port of the hydraulic cylinder 1.
In the scheme, when the second cartridge valve 4 and the first cartridge valve 3 are opened, an injection oil path unit is formed, and a piston and a screw of the hydraulic cylinder 1 perform forward movement, namely injection movement, while when the second cartridge valve 4 and the third cartridge valve 5 are opened, a retraction oil path unit is formed and a differential oil path is formed at the same time, and the piston and the screw of the hydraulic cylinder 1 retract to perform glue extraction movement; the specific working principle is as follows:
the working principle of the injection oil circuit unit is as follows: the right side of double-end solenoid valve 8 is switched on, the high-pressure hydraulic oil that oil pump P end was carried removes to the B hole of second cartridge valve 4, when the double-end solenoid valve 8 right side was the disconnection, hydraulic oil can't pass through double-end solenoid valve 8, consequently can die the case of second cartridge valve 4, and the circular telegram in double-end solenoid valve 8 right side is closed back, the oil pressure of 4 control ends of second cartridge valve is unloaded, the case is opened, hydraulic oil enters into there is the pole chamber from the AB hole of second cartridge valve 4 and the hydraulic cylinder 1 hydraulic cylinder's the hydraulic fluid port that advances, thereby promote piston and screw rod and advance, penetrate the action of gluing.
And in the process of advancing the piston and the screw, the hydraulic oil in the rodless cavity is discharged from the oil return port and returns to the oil tank from the AB hole of the first cartridge valve 3. In addition, the hydraulic oil discharged from the back-off oil port can also enter the hole B of the third cartridge valve 5, and the valve core of the third cartridge valve 5 is opened at the moment, so that the hydraulic oil can return to the front oil port of the hydraulic cylinder 1 again through the third cartridge valve 5, a differential oil path is formed, the flow rate of the hydraulic oil with the rod cavity is accelerated, and the glue injection action is rapidly completed.
The working principle of the backspacing oil circuit unit is as follows: when the glue injection action is finished and the screw needs to be retracted for glue extraction, the left end of the double-end electromagnetic valve 8 is powered, and hydraulic oil enters a rodless cavity of the hydraulic cylinder 1 after passing through the double-end electromagnetic valve 8, so that the piston and the screw are pushed to retract; because the case of third cartridge valve 5 is in the state of opening at this moment, therefore some hydraulic oil still can enter into the pole intracavity that has of pneumatic cylinder 1 from third cartridge valve 5, because the atress area of piston in pole intracavity side will be less than rodless chamber one side, based on pressure sign F ═ PS, the atress of piston in rodless chamber one side is greater than pole intracavity side, because the piston in pneumatic cylinder 1 still can retreat.
In addition, in the piston retraction process, hydraulic oil in the rod cavity is discharged, the discharged hydraulic oil can return to the oil tank through the first cartridge valve 3 through the third cartridge valve 5, and partial return oil can enter the rodless cavity through the retraction oil port because the hole B of the third cartridge valve 5 is connected with the retraction oil port, so that a differential loop is formed, namely, the hydraulic oil in the rod cavity does not completely return to the oil tank, but partially enters the rodless cavity, and the retraction speed of the piston and the screw rod is higher.
In addition, a pressure backup valve 10 is further arranged in the system, the pressure backup valve 10 is electrically connected with the single-end electromagnetic valve 7, when the hydraulic motor 2 drives the screw to rotate to feed forward, the screw can be retracted by the reaction force, and when the screw retracts, hydraulic oil in the rod cavity needs to be released, so that the pressure backup valve 10 is arranged, and the oil pressure in the system is ensured to be in a stable state.
According to the scheme disclosed in the embodiment, the advancing and retreating actions of the hydraulic cylinder 1 are realized only by matching three cartridge valves (the second cartridge valve 4, the first cartridge valve 3 and the third cartridge valve 5) with one pilot type electromagnetic valve, and compared with a traditional full cartridge valve system (which can be completed by four cartridge valves), the use amount of the cartridge valves is reduced, the cost is reduced, and the occupied area of a control system is also reduced; compared with a slide valve system for a small-sized machine, the hydraulic oil injection system has the advantages that the hydraulic oil passage is larger, and the injection speed is improved.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (2)
1. Injection cartridge hydraulic control system, including oil pump, pneumatic cylinder, hydraulic motor and oil tank, the pneumatic cylinder is including advancing the hydraulic fluid port and returning the hydraulic fluid port, its characterized in that: the hydraulic control system also comprises a first cartridge valve, a second cartridge valve, a third cartridge valve, a fourth cartridge valve, a double-end solenoid valve and a single-end solenoid valve, wherein the first cartridge valve, the second cartridge valve and the fourth cartridge valve are two-way directional cartridge valves, the third cartridge valve is a two-way pressure type cartridge valve, the P end of the oil pump is connected with the fourth cartridge valve and the second cartridge valve, the single-end solenoid valve controls the fourth cartridge valve, and the single-end solenoid valve, the fourth cartridge valve and the hydraulic motor form a feeding oil path unit to finish feeding;
the double-head electromagnetic valve controls the first cartridge valve and the second cartridge valve, the hole A of the first cartridge valve and the hole A of the second cartridge valve are connected with a backspacing oil port, the hole B of the first cartridge valve is connected with an oil tank, the hole A of the third cartridge valve is connected with a forward oil port of the hydraulic cylinder, the hole B of the third cartridge valve is connected with a backspacing oil port of the hydraulic cylinder, the first cartridge valve and the second cartridge valve are opened to form an injection oil path unit, a piston of the hydraulic cylinder is controlled to move forward, and when the second cartridge valve and the third cartridge valve are opened, a backspacing oil path unit is formed and the piston of the hydraulic cylinder is controlled to move backward.
2. The injection instrumentation hydraulic control system of claim 1, wherein: the pressure-supply valve is electrically connected with the single-head electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021566545.6U CN212888806U (en) | 2020-07-31 | 2020-07-31 | Injection plug-in mounting hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021566545.6U CN212888806U (en) | 2020-07-31 | 2020-07-31 | Injection plug-in mounting hydraulic control system |
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| Publication Number | Publication Date |
|---|---|
| CN212888806U true CN212888806U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021566545.6U Active CN212888806U (en) | 2020-07-31 | 2020-07-31 | Injection plug-in mounting hydraulic control system |
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| CN (1) | CN212888806U (en) |
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- 2020-07-31 CN CN202021566545.6U patent/CN212888806U/en active Active
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Address after: 210000 room 307-28, building A10, No. 9 Kechuang Avenue, intelligent manufacturing Industrial Park (Zhihe Park), Jiangbei new area, Nanjing, Jiangsu Province Patentee after: Nanjing Zhuoyi Control Technology Co.,Ltd. Address before: 9-6, No.220, building 1, Wanda Commercial Plaza, Jiangbei, Ningbo, Zhejiang 315000 Patentee before: NINGBO ZHUOYI CONTROL TECHNOLOGY Co.,Ltd. |