CN213856861U - Hydraulic system of hydraulic upsetter - Google Patents
Hydraulic system of hydraulic upsetter Download PDFInfo
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- CN213856861U CN213856861U CN202022743247.6U CN202022743247U CN213856861U CN 213856861 U CN213856861 U CN 213856861U CN 202022743247 U CN202022743247 U CN 202022743247U CN 213856861 U CN213856861 U CN 213856861U
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Abstract
The utility model discloses a hydraulic pressure upsetter hydraulic system increases stack formula liquid accuse check valve at the auxiliary cylinder control circuit, and the auxiliary cylinder can pressurize alone, and the auxiliary hydraulic pump can be after accomplishing the auxiliary cylinder action, for the energy storage ware pressurizes. The pressure oil in the accumulator can provide power for the fast forward motion of the upsetting-extruding cylinder. The main hydraulic pump can only provide power for the upsetting-extruding cylinder to fast feed and clamp the cylinder, and the two actions of upsetting-extruding cylinder fast-forwarding and clamping cylinder clamping are not interfered with each other. The main hydraulic pump is provided with the electromagnetic overflow valve, the pressure of the electromagnetic overflow valve is switched by a three-position four-way electromagnetic reversing valve arranged on the main hydraulic pump, and when the electromagnetic overflow valve is disconnected, the main hydraulic pump is in an unloading state, so that the power waste when the main hydraulic pump does not work is avoided. When the electromagnetic overflow valve is conducted, two working pressures, namely the feeding pressure of the upsetting-extruding oil cylinder and the locking pressure of the locking oil cylinder, can be switched, so that the upsetting-extruding and the locking pressures are respectively controlled.
Description
Technical Field
The utility model belongs to the technical field of jolting machine hydraulic system, a hydraulic pressure jolting machine hydraulic system is related to.
Background
The hydraulic upsetter is one kind of hydraulic forging press and is mainly used for hot forging and forming the ends of metal bars and pipes.
The YPD type hydraulic upsetting unit is widely applied to industries such as oil fields, buildings, bridges and the like, is a preferred device for producing large-batch and high-precision upsetting workpieces, and is very suitable for upsetting the ends of long rods such as round steel, steel pipes and the like. The YPD hydraulic upsetter mainly comprises a hydraulic control system, an upsetting-extruding oil cylinder assembly, a clamping oil cylinder assembly and an auxiliary oil cylinder assembly. The working process can be simply described as follows: the method comprises the steps of extending and maintaining the pressure of an auxiliary oil cylinder, extending and maintaining the pressure of a clamping oil cylinder, fast forwarding an upsetting and extruding oil cylinder, working and advancing the upsetting and extruding oil cylinder, fast retreating the upsetting and extruding oil cylinder, retreating the clamping oil cylinder and retreating the auxiliary oil cylinder. All actions are driven and controlled by a hydraulic control system.
The hydraulic principle of the existing YPD upsetter has the following problems:
the auxiliary motor pump set only provides power for the action of the auxiliary oil cylinder, and the auxiliary oil cylinder cannot keep the pressure, so that the auxiliary pump set is always in an operating state to maintain the pressure of the auxiliary oil cylinder. According to a calculation formula according to the output power of the hydraulic system: p0Q ═ P, where P0In the process of maintaining the pressure of the auxiliary oil cylinder, the auxiliary oil cylinder does not work, and all the power P is known0All the hydraulic oil is used for heating, which not only wastes energy, but also causes heating of the system, influences the service life of the hydraulic system and causes leakage and pollution of the hydraulic oil;
the main motor pump set provides power for the clamping oil cylinder and the upsetting oil cylinder, but the pressure required by the clamping oil cylinder and the upsetting oil cylinder needs to be adjusted according to actual conditions, and the actual use pressure is different. However, in the existing principle, the upsetting-extruding cylinder and the clamping cylinder commonly use one overflow valve to control the pressure, so that the actual pressures of the upsetting-extruding cylinder and the clamping cylinder are the highest values of two working pressures when in use, which not only causes the waste of power, but also causes the reduction of the processing quality of a workpiece due to overhigh pressure;
because the clamping oil cylinder and the upsetting oil cylinder simultaneously use the main motor pump set to provide power, the two actions can mutually influence if simultaneously carried out, and the pressure (clamping force) and the flow (speed) are insufficient. A single action would again result in wasted time and reduced efficiency.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a hydraulic upsetter hydraulic system, reach energy-conservation, high efficiency, system stability, reliability height.
The utility model discloses a hydraulic pressure upsetter hydraulic system, include: the hydraulic control system comprises an oil tank, an oil return filter, an auxiliary hydraulic pump, a main hydraulic pump, a water cooler, an auxiliary pump set electromagnetic overflow valve, a third one-way valve, a main motor pump set electromagnetic overflow valve, a third electro-hydraulic directional valve, a superposed hydraulic control one-way valve, a superposed one-way throttle valve, a third pressure sensor, an unloading valve, a second electro-hydraulic directional valve, a first electro-hydraulic directional valve, a hydraulic control one-way valve, a first pressure sensor, a second pressure sensor, a differential control valve, an energy accumulator, a differential valve, an upsetting-extruding oil cylinder, an auxiliary oil cylinder, a clamping oil cylinder, a first one-way valve, a second one-way valve and an electric cabinet;
an oil inlet of the auxiliary hydraulic pump is connected with an oil tank, an oil outlet of the auxiliary hydraulic pump is connected with an oil inlet of a third electro-hydraulic reversing valve through a first one-way valve, a first oil outlet of the third electro-hydraulic reversing valve is sequentially connected with a superposition type hydraulic control one-way valve and a superposition type one-way throttle valve and then is connected with a rodless cavity of the auxiliary oil cylinder through a pipeline, a second oil outlet of the third electro-hydraulic reversing valve is sequentially connected with the superposition type hydraulic control one-way valve and the superposition type one-way throttle valve and then is connected with a rod cavity of the auxiliary oil cylinder through a pipeline, and an oil return port of the third electro-hydraulic reversing valve is connected with the oil tank through an oil return filter; an oil outlet of the first one-way valve is connected with an oil tank through an electromagnetic overflow valve of the auxiliary pump set and an oil return filter in sequence; an oil outlet of the auxiliary hydraulic pump is connected with the energy accumulator sequentially through the first one-way valve and the second one-way valve, and the third pressure sensor is arranged on a pipeline of the second one-way valve and the energy accumulator; the energy accumulator is connected with a rodless cavity of the upsetting-extruding oil cylinder through a differential control valve, a rod cavity of the upsetting-extruding oil cylinder is connected with a rodless cavity of the upsetting-extruding oil cylinder through a differential valve, the rodless cavity of the upsetting-extruding oil cylinder is connected with an oil tank through an unloading valve, and the second pressure sensor is connected with the rodless cavity of the upsetting-extruding oil cylinder;
an oil inlet of the main hydraulic pump is connected with an oil tank, an oil outlet of the main hydraulic pump is connected with a second electro-hydraulic reversing valve and a first electro-hydraulic reversing valve through a third one-way valve, a first oil outlet of the second electro-hydraulic reversing valve is connected with a rodless cavity of the upsetting-extruding oil cylinder, a second oil outlet of the second electro-hydraulic reversing valve is connected with a rod cavity of the upsetting-extruding oil cylinder, and an oil return port of the second electro-hydraulic reversing valve is connected with the oil tank; a first oil outlet of the first electro-hydraulic reversing valve is connected with a rod cavity of the clamping oil cylinder, a second oil outlet of the first electro-hydraulic reversing valve is connected with a rodless cavity of the clamping oil cylinder through a hydraulic control one-way valve, a control port of the hydraulic control one-way valve is connected with the rod cavity of the clamping oil cylinder, a first pressure sensor is connected with an oil outlet of the hydraulic control one-way valve, and an oil return port of the first electro-hydraulic reversing valve is connected with an oil tank; an oil outlet of the main hydraulic pump is connected with an oil tank through an electromagnetic overflow valve of a main motor pump set and a water cooler in sequence; the electric control box is respectively connected with a first pressure sensor, a second pressure sensor, a third pressure sensor, an auxiliary pump set electromagnetic overflow valve, a main motor pump set electromagnetic overflow valve, a first electro-hydraulic reversing valve, a second electro-hydraulic reversing valve, a third electro-hydraulic reversing valve, an unloading valve and a differential control valve.
The utility model discloses an among the hydraulic system of hydraulic pressure upsetter, main motor pump package electromagnetism overflow valve comprises two-way cartridge valve lock pin, apron, tribit cross solenoid directional valve and two overflow valves.
The utility model discloses an among the hydraulic system of hydraulic upsetter, differential control valve and unloading valve structure are the same and all constitute by two-way cartridge valve lock pin, apron and electromagnetism ball valve.
The utility model discloses an among the hydraulic system of hydraulic upsetter, differential valve and third check valve all comprise two-way cartridge valve lock pin and apron.
In the hydraulic system of the hydraulic upsetter of the utility model, the hydraulic system further comprises a first pressure gauge, a second pressure gauge and a third pressure gauge; the first pressure gauge is connected with an oil outlet of the hydraulic control one-way valve through a pipeline, the second pressure gauge is connected with a rodless cavity of the upsetting-extruding oil cylinder, the third pressure gauge is connected with an oil outlet of the second one-way valve through a pipeline, and the fourth pressure gauge is connected with an oil outlet of the main hydraulic pump through a pipeline.
The utility model discloses an among the hydraulic system of hydraulic upsetter, be equipped with the heater in the oil tank.
The utility model discloses an among the hydraulic system of hydraulic upsetter, be equipped with level gauge and air cleaner on the oil tank.
The utility model discloses a hydraulic pressure upsetter hydraulic system increases stack formula liquid accuse check valve at the auxiliary cylinder control circuit, and the auxiliary cylinder can pressurize alone, and the auxiliary hydraulic pump can be after accomplishing the auxiliary cylinder action, for the energy storage ware pressurizes. The pressure oil in the accumulator can provide power for the fast forward motion of the upsetting-extruding cylinder. The main hydraulic pump can only provide power for the clamping oil cylinder, and the actions of upsetting and extruding oil cylinder fast forward and clamping oil cylinder clamping are not interfered mutually. The main hydraulic pump is provided with a main motor pump set electromagnetic overflow valve, the pressure of the main motor pump set electromagnetic overflow valve is switched by a three-position four-way electromagnetic reversing valve arranged on the main motor pump set electromagnetic overflow valve, and when a coil on the electromagnetic overflow valve is not electrified, the main hydraulic pump is in an unloading state, so that power waste when the main hydraulic pump is not in operation is avoided. When two coils on the electromagnetic overflow valve are respectively electrified, two working pressures can be switched, namely the feeding pressure of the upsetting-extruding oil cylinder and the locking pressure of the locking oil cylinder, so that the upsetting-extruding and the locking pressures are respectively controlled.
Drawings
FIG. 1 is a schematic diagram of a hydraulic upsetter hydraulic system of the present invention;
in the figure: 1-an oil tank, 3-a heater, 4-an oil return filter, 5-an auxiliary motor pump set, 6-a main motor pump set, 7-a water cooler, 8-an auxiliary pump set electromagnetic overflow valve, 9-a one-way valve, 10-a main motor pump set electromagnetic overflow valve, 11-a third electro-hydraulic directional valve, 12-a superposed hydraulic control one-way valve, 13-a superposed one-way throttle valve, 14-a third pressure sensor, 15-an unloading valve, 16-a second electro-hydraulic directional valve, 17-a first electro-hydraulic directional valve, 18-a hydraulic control one-way valve, 19-a first pressure sensor, 20-a second pressure sensor, 21-a differential control valve, 22-an energy accumulator, 23-a differential valve, 24-an upsetting oil cylinder, 25-an auxiliary oil cylinder and 26-a clamping oil cylinder, 27-a first check valve, 28-a second check valve, 29-a liquid level meter, 30-an air filter, 31-a first pressure gauge, 32-a second pressure gauge, 33-a third pressure gauge, 34-a fourth pressure gauge.
Detailed Description
As shown in fig. 1, the utility model discloses a hydraulic upsetter hydraulic system, include: the hydraulic control system comprises an oil tank 1, an oil return filter 4, an auxiliary motor pump unit 5, a main motor pump unit 6, a water cooler 7, an auxiliary pump unit electromagnetic overflow valve 8, a third one-way valve 9, a main motor pump unit electromagnetic overflow valve 10, a third electro-hydraulic directional valve 11, a superposed hydraulic control one-way valve 12, a superposed one-way throttle valve 13, a third pressure sensor 14, an unloading valve 15, a second electro-hydraulic directional valve 16, a first electro-hydraulic directional valve 17, a hydraulic control one-way valve 18, a first pressure sensor 19, a second pressure sensor 20, a differential control valve 21, an energy accumulator 22, a differential valve 23, an upsetting oil cylinder 24, an auxiliary oil cylinder 25, a clamping oil cylinder 26, a first one-way valve 27 and a second one-way valve 28.
The oil tank 1 is connected to the oil inlet of the auxiliary hydraulic pump of the auxiliary motor pump group 5, the oil outlet is connected with the oil inlet of the third electro-hydraulic directional valve 11 through the first check valve 27, the first oil outlet of the third electro-hydraulic directional valve 11 is connected with the superposition type hydraulic control check valve 12 and the superposition type one-way throttle valve 13 in sequence and then is connected with the rodless cavity of the auxiliary oil cylinder 25 through a pipeline, the second oil outlet of the third electro-hydraulic directional valve 11 is connected with the superposition type hydraulic control check valve 12 and the superposition type one-way throttle valve 13 in sequence and then is connected with the rod cavity of the auxiliary oil cylinder 25 through a pipeline, and the oil return port of the third electro-hydraulic directional valve 11 is connected with the oil tank 1 through the oil return filter 4. The oil outlet of the first one-way valve 27 is connected with the oil tank 1 through the auxiliary pump set electromagnetic overflow valve 8 and the oil return filter 4 in sequence. The oil outlet of the auxiliary hydraulic pump 5 is connected with the accumulator 22 through a first check valve 27 and a second check valve 28 in sequence, and the third pressure sensor 14 is arranged on the pipelines of the second check valve 28 and the accumulator 22. The energy accumulator 22 is connected with a rodless cavity of an upsetting-extruding oil cylinder 24 through a differential control valve 21, a rod cavity of the upsetting-extruding oil cylinder 24 is connected with a rodless cavity of the upsetting-extruding oil cylinder 24 through a differential valve 23, the rodless cavity of the upsetting-extruding oil cylinder 24 is connected with the oil tank 1 through an unloading valve 15, and the second pressure sensor 20 is connected with the rodless cavity of the upsetting-extruding oil cylinder 24.
An oil inlet of a main hydraulic pump of the main motor pump set 6 is connected with the oil tank 1, an oil outlet of the main hydraulic pump is connected with a second electro-hydraulic reversing valve 16 and a first electro-hydraulic reversing valve 17 through a third one-way valve 9, a first oil outlet of the second electro-hydraulic reversing valve 16 is connected with a rodless cavity of the upsetting-extruding oil cylinder 24, a second oil outlet of the second electro-hydraulic reversing valve 16 is connected with a rod cavity of the upsetting-extruding oil cylinder 24, and an oil return port of the second electro-hydraulic reversing valve 16 is connected with the oil tank 1. The first oil outlet of the first electro-hydraulic reversing valve 17 is connected with the rod cavity of the clamping oil cylinder 26, the second oil outlet of the first electro-hydraulic reversing valve 17 is connected with the rodless cavity of the clamping oil cylinder 26 through the hydraulic control one-way valve 18, and the control port of the hydraulic control one-way valve 18 is connected with the rod cavity of the clamping oil cylinder 26. The first pressure sensor 19 is connected with an oil outlet of the hydraulic control one-way valve 17, and an oil return port of the first electro-hydraulic reversing valve 17 is connected with the oil tank 1. An oil outlet of a main hydraulic pump of the main motor pump set 6 is connected with the oil tank 1 sequentially through the main motor pump set electromagnetic overflow valve 10 and the water cooler 7. The electric control box is respectively connected with a first pressure sensor 19, a second pressure sensor 20, a third pressure sensor 14, an auxiliary pump set electromagnetic overflow valve 8, a main motor pump set electromagnetic overflow valve 10, a first electro-hydraulic directional valve 17, a second electro-hydraulic directional valve 16, a third electro-hydraulic directional valve 11, an unloading valve 15 and a differential control valve 21.
Furthermore, the electromagnetic overflow valve 10 of the main motor pump set consists of a two-way cartridge valve insert core, a cover plate, a three-position four-way electromagnetic directional valve and two overflow valves. The differential control valve 21 and the unloading valve 15 have the same structure and are composed of a two-way cartridge valve insert core, a cover plate and an electromagnetic ball valve. The differential valve 23 and the third one-way valve 9 are both composed of a two-way cartridge valve insert core and a cover plate.
Further, the hydraulic system further comprises a first pressure gauge 31, a second pressure gauge 32 and a third pressure gauge 33. The first pressure gauge 31 is connected with an oil outlet of the hydraulic control one-way valve 18 through a pipeline, the second pressure gauge 32 is connected with a rodless cavity of the upsetting-extruding oil cylinder 24, the third pressure gauge 33 is connected with an oil outlet of the second one-way valve 28 through a pipeline, and the fourth pressure gauge 34 is connected with an oil outlet of the main hydraulic pump through a pipeline.
Further, a heater 3 is arranged in the oil tank 1. The oil tank 1 is provided with a liquid level meter 29 and an air filter 30.
The current hydraulic pressure principle of contrast, the utility model discloses mainly there is following improvement:
(1) the auxiliary motor-pump unit 5 not only provides power for the auxiliary cylinder action 25, but also feeds hydraulic oil to the accumulator 22 in the case of no action of the auxiliary cylinder 25. On the control loop of the auxiliary oil cylinder 25, the superposed hydraulic control one-way valve 12 is added, and the independent pressure maintaining function of the auxiliary oil cylinder 25 is realized, so that the auxiliary motor-pump unit 5 does not need to supply pressure to the auxiliary oil cylinder 25 all the time, and the auxiliary motor-pump unit 5 can charge the energy accumulator 22 in a short time after the action of the auxiliary oil cylinder 25 is completed. When the third pressure sensor 14 reaches the upper limit of the set pressure value, the charging is stopped, the auxiliary motor-pump set 5 can stop working, and the auxiliary oil cylinder 25 can maintain the pressure. The pressure oil stored in the accumulator 22 can provide power for the subsequent fast forward action of the upsetting oil cylinder 24, when the coil 7AV of the electromagnetic ball valve in the differential control valve 21 is electrified, the differential control valve 21 and the differential valve 23 can act simultaneously, the hydraulic oil can enter the rodless cavity of the upsetting oil cylinder 24 from the accumulator 22 through the differential control valve 21, and the differential control valve 21 and the differential valve 23 realize the differential action of the upsetting oil cylinder 24, so that the fast forward action is realized. When the pressure oil in the accumulator 22 falls to the lower limit of the pressure value set by the third pressure sensor 14, the auxiliary motor-pump set 5 is restarted to supplement pressure for the accumulator 22. The energy accumulator 22 can be quickly advanced by upsetting the oil cylinder 24 for multiple times through once pressure compensation, so that frequent starting is not needed, and energy can be greatly saved.
(2) The utility model discloses a hydraulic system has set up a set of main motor pump package electromagnetism overflow valve 10 for main motor pump package 6, and the pressure of main motor pump package electromagnetism overflow valve 10 leans on the tribit cross electromagnetic directional valve of its self installation to switch. When the first coil 2AV and the second coil 11AV of the three-position four-way electromagnetic reversing valve are not electrified, the main motor pump unit 6 is in an unloading state, and power waste in the process of non-operation is avoided. When the first coil 2AV or the second coil 11AV of the three-position four-way electromagnetic reversing valve is electrified, two working pressures can be switched, namely the working pressure of the upsetting-extruding oil cylinder 24 and the locking pressure of the locking oil cylinder 26. Thus, the upsetting-extruding pressure and the locking pressure are respectively controlled, and the processing defect caused by the same upsetting-extruding pressure and the same locking pressure is avoided.
(3) The utility model discloses a hydraulic system, because the upset crowded hydro-cylinder 24 fast-forwards is provided power by energy storage ware 22, so at the in-process that upset crowded hydro-cylinder 24 advances soon, main motor pump package 6 can only provide power for pressing from both sides tight hydro-cylinder 26, and upset crowded hydro-cylinder 24 advances soon and presss from both sides tight two actions of clamp and can accomplish mutual noninterference with tight hydro-cylinder 26. And because the upsetting-extruding cylinder 24 is fast-forwarded by the energy accumulator 22 and a differential circuit is used, the upsetting-extruding cylinder is not limited by the displacement of the main motor pump unit 6 any more, and the speed is greatly increased compared with the speed of the original hydraulic system. Thus, the production efficiency is greatly improved.
Specific operation explanation:
the auxiliary oil cylinder moves downwards: when an action starting button in the electric control box is pressed, the auxiliary motor pump unit 5 operates, a coil 1AV of an electromagnetic overflow valve 8 of the auxiliary pump unit and a second coil 4AV of a third electro-hydraulic directional valve 11 are electrified, hydraulic oil is sucked from the oil tank 1 through an oil suction filter and is boosted, the hydraulic oil enters a rodless cavity of an auxiliary oil cylinder 25 through a first check valve 27, the third electro-hydraulic directional valve 11, a superposed hydraulic control check valve 12 and a superposed check throttle valve 13, rod cavity hydraulic oil returns to the oil tank 1 through the superposed hydraulic control check valve 13, the superposed hydraulic control check valve 12 and the third electro-hydraulic directional valve 11, a piston rod of the auxiliary oil cylinder 25 descends, the second coil 4AV of the third electro-hydraulic directional valve 11 is powered off after the hydraulic oil cylinder descends to a proper position, and the auxiliary oil cylinder 25 maintains pressure under the action of the superposed hydraulic control check valve 12.
Charging an energy accumulator: when the third pressure sensor 14 detects that the pressure of the energy accumulator 22 reaches the upper limit of a set value, the coil 1AV of the auxiliary pump unit electromagnetic overflow valve 8 is powered off, the oil circuit of the auxiliary motor pump unit is unloaded, and the pressure of the energy accumulator 22 is maintained under the action of the second one-way valve 28. When the third pressure sensor 14 detects that the pressure of the energy accumulator 22 drops to reach the lower limit of the set value, the coil 1AV1AV of the electromagnetic overflow valve 8 of the auxiliary pump set is electrified, the oil path of the auxiliary pump set 5 is boosted, pressure oil continuously enters the energy accumulator 22 to supplement pressure for the energy accumulator 22, and the actions are repeated.
Clamping by a clamping cylinder: after the auxiliary cylinder 25 is in place, the clamping cylinder 26 begins to extend for clamping. The main motor pump unit 6 operates, a first coil 2AV of the main motor pump unit electromagnetic overflow valve 10 and a first coil 9AV of the first electro-hydraulic directional valve 17 are electrified, hydraulic oil is sucked from an oil tank and is boosted by the main motor pump unit 6, the hydraulic oil enters a rodless cavity of the clamping oil cylinder 26 through the third one-way valve 9, the first electro-hydraulic directional valve 17 and the hydraulic control one-way valve 18, hydraulic oil in the rod cavity returns to the oil tank 1 through the first electro-hydraulic directional valve 17, a piston rod stretches out to achieve clamping action, when the first pressure sensor 19 detects that clamping pressure reaches a set value upper limit, the first coil 2AV of the main motor pump unit electromagnetic overflow valve 10 and the first coil 9AV of the first electro-hydraulic directional valve 17 are powered off, and the clamping oil cylinder 26 achieves pressure maintaining work under the action of the hydraulic control one-way valve 18. When the first pressure sensor 19 detects that the clamping pressure falls to the lower limit of the set value, the actions are repeated, and automatic pressure compensation is realized.
Fourthly, fast forwarding of the upsetting oil cylinder: the upsetting oil cylinder 24 and the clamping oil cylinder 26 can be synchronously operated, when the auxiliary oil cylinder 25 is in place, the coil 7AV of the electromagnetic ball valve of the differential control valve 21 is electrified, hydraulic oil enters a rodless cavity of the upsetting oil cylinder 24 from the energy accumulator 22 through the differential control valve 21, the hydraulic oil with a rod cavity also returns to the rodless cavity of the upsetting oil cylinder 24 through the differential valve 23, large-flow oil feeding of the upsetting oil cylinder 24 is realized, and the working condition of fast advance of the upsetting oil cylinder 24 is achieved. When the upsetting oil cylinder 24 fast advances to a set stroke, the coil 7AV of the electromagnetic ball valve of the differential control valve 21 is powered off, oil feeding from the energy accumulator 22 to the upsetting oil cylinder 24 is blocked, and the upsetting oil cylinder fast advances.
And fifthly, feeding the upsetting and extruding oil cylinder: after the fast forward stops, the process starts to be changed to the working process. When the hydraulic heading machine works in, the main motor pump unit 6 runs, the second coil 11AV of the electromagnetic overflow valve of the main motor pump unit and the second coil 6AV of the second electro-hydraulic directional valve 16 are electrified, hydraulic oil is sucked from the oil tank 1 by the main motor pump unit 6 and is boosted, the hydraulic oil enters the rodless cavity of the heading and extruding oil cylinder 24 through the third one-way valve 9 and the second electro-hydraulic directional valve 16, the hydraulic oil in the cavity with the rod returns to the oil tank 1 through the second electro-hydraulic directional valve 16, and the heading and extruding oil cylinder 24 starts working. When the working progress reaches the working progress stroke, the second coil 11AV of the electromagnetic overflow valve of the main motor pump set and the second coil 6AV of the second electro-hydraulic reversing valve 16 are powered off, and the working progress action is finished.
Sixthly, quickly withdrawing the upsetting-extruding oil cylinder: and after the work progress is finished, the work progress is converted into fast backward. When the upsetting oil cylinder 24 moves fast, the main motor pump unit 6 operates, a second coil 11AV of an electromagnetic overflow valve of the main motor pump unit, a first coil 5AV of the second electro-hydraulic reversing valve 16 and a coil 8AV of the unloading valve 15 are electrified, hydraulic oil is sucked from the oil tank 1 by the main motor pump unit 6 and is boosted, the hydraulic oil enters a rod cavity of the upsetting oil cylinder 24 through the third one-way valve 9 and the second electro-hydraulic reversing valve 16, hydraulic oil without a rod cavity returns to the oil tank through the second electro-hydraulic reversing valve 16 and the unloading valve 15, and the upsetting oil cylinder 24 starts to move fast. When the head is quickly retreated, the second coil 11AV of the electromagnetic overflow valve 10 of the main motor pump set, the first coil 5AV of the second electro-hydraulic reversing valve 16 and the coil 8AV of the unloading valve 15 are powered off, and the quick retreating action is completed.
Seventhly, clamping the oil cylinder to retreat: after the upsetting oil cylinder 24 moves back to the right position, the clamping oil cylinder 26 starts to move back. The main motor pump unit 6 runs, a first coil 2AV of the electromagnetic overflow valve 10 of the main motor pump unit and a second coil 10AV of the first electro-hydraulic reversing valve 17 are electrified, hydraulic oil is sucked from the oil tank 1 by the main motor pump unit 6 and is boosted, the hydraulic oil enters the rod cavity of the clamping oil cylinder 26 through the third check valve 9 and the first electro-hydraulic reversing valve 17, the hydraulic oil in the rodless cavity returns to the oil tank 1 through the hydraulic control check valve 18 and the first electro-hydraulic reversing valve 17, and the piston rod retracts to achieve retraction.
Eighthly, ascending the auxiliary oil cylinder: after the clamping oil cylinder 26 retracts, the piston rod of the auxiliary oil cylinder 25 starts to move upwards, the auxiliary motor pump set 5 operates, a coil 1AV of an electromagnetic overflow valve 8 of the auxiliary pump set and a first coil 3AV of a third electro-hydraulic directional valve 11 are electrified, hydraulic oil is sucked from the oil tank 1 through an oil suction filter and is boosted, enters a rod cavity of the auxiliary oil cylinder 25 through a first one-way valve 27, the third electro-hydraulic directional valve 11, a superposed hydraulic control one-way valve 12 and a superposed one-way throttle valve 13, returns to the oil tank 1 through the superposed one-way throttle valve 13, the superposed hydraulic control one-way valve 12 and the third electro-hydraulic directional valve 11, moves upwards in the auxiliary oil cylinder 25, the first coil 3AV of the third electro-hydraulic directional valve 11 is powered off after moving upwards in place, and the auxiliary oil cylinder 25 maintains pressure under the action of the superposed hydraulic control one.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the spirit of the present invention, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A hydraulic upsetter hydraulic system, comprising: the hydraulic control system comprises an oil tank, an oil return filter, an auxiliary hydraulic pump, a main hydraulic pump, a water cooler, an auxiliary pump set electromagnetic overflow valve, a third one-way valve, a main motor pump set electromagnetic overflow valve, a third electro-hydraulic directional valve, a superposed hydraulic control one-way valve, a superposed one-way throttle valve, a third pressure sensor, an unloading valve, a second electro-hydraulic directional valve, a first electro-hydraulic directional valve, a hydraulic control one-way valve, a first pressure sensor, a second pressure sensor, a differential control valve, an energy accumulator, a differential valve, an upsetting-extruding oil cylinder, an auxiliary oil cylinder, a clamping oil cylinder, a first one-way valve, a second one-way valve and an electric cabinet;
an oil inlet of the auxiliary hydraulic pump is connected with an oil tank, an oil outlet of the auxiliary hydraulic pump is connected with an oil inlet of a third electro-hydraulic reversing valve through a first one-way valve, a first oil outlet of the third electro-hydraulic reversing valve is sequentially connected with a superposition type hydraulic control one-way valve and a superposition type one-way throttle valve and then is connected with a rodless cavity of the auxiliary oil cylinder through a pipeline, a second oil outlet of the third electro-hydraulic reversing valve is sequentially connected with the superposition type hydraulic control one-way valve and the superposition type one-way throttle valve and then is connected with a rod cavity of the auxiliary oil cylinder through a pipeline, and an oil return port of the third electro-hydraulic reversing valve is connected with the oil tank through an oil return filter; an oil outlet of the first one-way valve is connected with an oil tank through an electromagnetic overflow valve of the auxiliary pump set and an oil return filter in sequence; an oil outlet of the auxiliary hydraulic pump is connected with the energy accumulator sequentially through the first one-way valve and the second one-way valve, and the third pressure sensor is arranged on a pipeline of the second one-way valve and the energy accumulator; the energy accumulator is connected with a rodless cavity of the upsetting-extruding oil cylinder through a differential control valve, a rod cavity of the upsetting-extruding oil cylinder is connected with a rodless cavity of the upsetting-extruding oil cylinder through a differential valve, the rodless cavity of the upsetting-extruding oil cylinder is connected with an oil tank through an unloading valve, and the second pressure sensor is connected with the rodless cavity of the upsetting-extruding oil cylinder;
an oil inlet of the main hydraulic pump is connected with an oil tank, an oil outlet of the main hydraulic pump is connected with a second electro-hydraulic reversing valve and a first electro-hydraulic reversing valve through a third one-way valve, a first oil outlet of the second electro-hydraulic reversing valve is connected with a rodless cavity of the upsetting-extruding oil cylinder, a second oil outlet of the second electro-hydraulic reversing valve is connected with a rod cavity of the upsetting-extruding oil cylinder, and an oil return port of the second electro-hydraulic reversing valve is connected with the oil tank; a first oil outlet of the first electro-hydraulic reversing valve is connected with a rod cavity of the clamping oil cylinder, a second oil outlet of the first electro-hydraulic reversing valve is connected with a rodless cavity of the clamping oil cylinder through a hydraulic control one-way valve, a control port of the hydraulic control one-way valve is connected with the rod cavity of the clamping oil cylinder, a first pressure sensor is connected with an oil outlet of the hydraulic control one-way valve, and an oil return port of the first electro-hydraulic reversing valve is connected with an oil tank; an oil outlet of the main hydraulic pump is connected with an oil tank through an electromagnetic overflow valve of a main motor pump set and a water cooler in sequence; the electric control box is respectively connected with a first pressure sensor, a second pressure sensor, a third pressure sensor, an auxiliary pump set electromagnetic overflow valve, a main motor pump set electromagnetic overflow valve, a first electro-hydraulic reversing valve, a second electro-hydraulic reversing valve, a third electro-hydraulic reversing valve, an unloading valve and a differential control valve.
2. The hydraulic system of a hydraulic upsetter according to claim 1, characterized in that said main motor pump set electromagnetic relief valve is composed of a two-way cartridge valve insert, a cover plate, a three-position four-way electromagnetic directional valve and two relief valves.
3. The hydraulic system of a hydraulic upsetter according to claim 1, wherein said differential control valve and said unloading valve are identical in structure and are composed of a two-way cartridge insert, a cover plate and an electromagnetic ball valve.
4. The hydraulic upsetter system according to claim 1, wherein said differential valve and said third one-way valve are each comprised of a two-way cartridge insert and a cover plate.
5. The hydraulic upsetter system according to claim 1, wherein said hydraulic system further includes a first pressure gauge, a second pressure gauge, a third pressure gauge and a fourth pressure gauge; the first pressure gauge is connected with an oil outlet of the hydraulic control one-way valve through a pipeline, the second pressure gauge is connected with a rodless cavity of the upsetting-extruding oil cylinder, the third pressure gauge is connected with an oil outlet of the second one-way valve through a pipeline, and the fourth pressure gauge is connected with an oil outlet of the main hydraulic pump through a pipeline.
6. A hydraulic system for a hydraulic upsetter as claimed in claim 1, wherein said oil tank is provided with a heater therein.
7. A hydraulic system of a hydraulic upsetter as claimed in claim 1, wherein said oil tank is provided with a level gauge and an air cleaner.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033775A (en) * | 2021-11-23 | 2022-02-11 | 武汉船用机械有限责任公司 | Multifunctional high-flow hydraulic system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033775A (en) * | 2021-11-23 | 2022-02-11 | 武汉船用机械有限责任公司 | Multifunctional high-flow hydraulic system and control method thereof |
| CN114033775B (en) * | 2021-11-23 | 2023-06-23 | 武汉船用机械有限责任公司 | Multifunctional large-flow hydraulic system and control method thereof |
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