Hydraulic system of rapid oil supply press machine
By introducing a booster tank and a filling valve into the hydraulic system, and combining natural oil replenishment with pressurized oil replenishment, the problem of slow pressurization speed of large hydraulic presses is solved, achieving rapid loading and reduced energy consumption.
Patent Information
- Application Number
- CN202520831708.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-29
AI Technical Summary
Existing large-scale high-speed hydraulic presses have a slow pressurization speed, resulting in high energy consumption and requiring a huge energy supply.
The hydraulic system employs a booster tank and a filling valve for rapid oil replenishment, combining natural oil replenishment and pressurized oil replenishment. Through the coordination of the rapid cylinder solenoid directional valve and the control solenoid directional valve, rapid oil supply to the cylinder is achieved.
Without increasing energy supply, the pressurization speed of the hydraulic cylinder was significantly improved, enabling rapid loading of the press and reducing pump flow and energy consumption.
Smart Images
Figure CN223854540U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of hydraulic systems, in particular to a kind of quick oil supply hydraulic press hydraulic system, applicable to the hydraulic press of a variety of large tonnage needing quick work. BACKGROUND
[0002] The hydraulic system of quick hydraulic press is driven by motor to hydraulic pump, and hydraulic oil enters into quick cylinder through pipeline and reversing valve, and quick cylinder lifts plunger to move quickly, and plunger cylinder is filled with oil quickly by liquid filling valve connected therewith, and since oil cylinder is relatively large, natural oil filling of liquid filling valve is relatively slow, so pressurized oil tank is added, and after natural oil filling, it is switched to pressurized oil tank to continue filling oil into oil cylinder, and after plunger cylinder is filled with oil, high-pressure pump is switched to plunger cylinder to supply high pressure through reversing valve, to realize pressurizing action.
[0003] At present, general large-scale press hydraulic system in market, especially 1000 tons and other large-scale quick hydraulic press, adopts the mode of liquid filling valve natural oil supplement, and pressurizing speed is relatively slow, and if pressurizing speed needs to be improved, pressurizing pump needs to be increased greatly, which needs great energy supply, and energy consumption of pump is large. SUMMARY
[0004] The utility model solves the technical problem to provide a kind of quick oil supply hydraulic press hydraulic system, it realizes the quick loading of press, and adopts pressurized oil tank and liquid filling valve quick oil supplement
[0005] Oil can realize the quick oil supply to oil cylinder, and can reduce the flow of pump to reduce energy consumption.
[0006] To solve the above technical problem, the utility model is realized by the following technical scheme:
[0007] The quick oil supply hydraulic press hydraulic system includes tank, oil inlet, and oil pump is arranged on the main oil delivery pipeline between tank and plunger cylinder, quick cylinder electromagnetic reversing valve and pressurizing electrohydraulic reversing valve are connected in parallel on the main oil delivery pipeline, quick cylinder electromagnetic reversing valve is connected with the oil inlet and oil outlet of quick cylinder through pipeline, pressurizing electrohydraulic reversing valve is connected with the oil inlet of plunger cylinder and control electromagnetic reversing valve, high-pressure liquid filling valve is arranged on the pipeline between control electromagnetic reversing valve and pressurized oil tank, low-pressure liquid filling valve is arranged on the branch pipeline between plunger cylinder and tank, the oil outlet of control electromagnetic reversing valve is connected with high-pressure liquid filling valve and low-pressure liquid filling valve respectively, and high-pressure liquid filling valve is connected with the lower cavity of plunger cylinder through pipeline.
[0008] Preferably, pressurizing check valve, pressurizing electrohydraulic reversing valve and hydraulic control check valve are sequentially arranged on the main oil delivery pipeline between the above-mentioned tank and plunger cylinder, the main oil delivery pipeline between pressurizing check valve and pressurizing electrohydraulic reversing valve is communicated with tank through branch pipeline.
[0009] Preferably, an electromagnetic overflow valve is arranged on the branch pipeline, and the electromagnetic overflow valve is communicated with the oil delivery pipeline.
[0010] Preferably, a safety check valve is arranged on the pipeline communicated with the oil tank, and the pressurized oil tank is connected with an external air source through the pneumatic check valve.
[0011] Preferably, the pressurized electro-hydraulic directional valve, the quick cylinder electromagnetic directional valve and the control electromagnetic directional valve are respectively connected with the oil tank through respective oil return pipelines.
[0012] Preferably, the oil pump is connected with the motor through a shaft.
[0013] Preferably, a visual liquid level meter is installed on the oil tank.
[0014] Preferably, an oil suction filter is arranged in the oil tank.
[0015] Preferably, a pressure gauge is connected with the pressurized check valve and the pressurized electro-hydraulic directional valve through a pressure measuring connector.
[0016] Preferably, the quick oil cylinder has two cylinders arranged in parallel.
[0017] Due to the above technical scheme, the hydraulic system has the following characteristics and effects:
[0018] The system realizes the combination of natural oil supplement and pressurized oil supplement, can greatly improve the speed of the oil cylinder without increasing the energy supply, realizes the rapid loading of the press machine, adopts the pressurized oil tank and the liquid filling valve to rapidly supplement oil, can rapidly supply oil to the oil cylinder, can reduce the flow of the pump and reduce energy consumption, and effectively solves the problems of slow speed and low efficiency of the large-tonnage hydraulic press system. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is the hydraulic principle diagram of the utility model.
[0020] In the figure, 1 is an oil tank, 2 is an oil suction filter, 3 is an oil inlet, 4 is a visual liquid level meter, 5 is an oil pump, 6 is a motor, 7 is a pressurized check valve, 8 is an electromagnetic overflow valve, 9 is a pressure measuring connector, 10 is a pressure gauge, 11 is a pressurized electro-hydraulic directional valve, 12 is a quick cylinder electromagnetic directional valve, 13 is a hydraulic control check valve, 14 is a low-pressure liquid filling valve, 15 is a high-pressure liquid filling valve, 16 is a plunger cylinder, 17 is a control electromagnetic directional valve, 18 is a quick oil cylinder, 19 is a pressurized oil tank, 20 is a safety check valve, and 21 is a pneumatic check valve. DETAILED DESCRIPTION
[0021] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0022] As Figure 1 The utility model discloses a quick oil supply press hydraulic system, which has the following structure: an oil tank 1 is provided with an oil inlet 3; a visual liquid level meter 4 is installed on the oil tank 1; an oil suction filter 2 is arranged in the oil tank 1; an oil pump 5 is arranged on a main oil conveying pipeline between the oil tank 1 and a plunger cylinder 16; the oil pump 5 is connected with a motor 6 through a shaft; a high-pressure pressurizing one-way valve 7, a pressurizing electro-hydraulic reversing valve 11 and a hydraulic control one-way valve 13 are sequentially arranged on the main oil conveying pipeline between the oil tank 1 and the plunger cylinder 16; the main oil conveying pipeline between the pressurizing one-way valve 7 and the pressurizing electro-hydraulic reversing valve 11 is communicated with the oil tank 1 through a branch pipeline; an electromagnetic overflow valve 8 is arranged on the branch pipeline and communicated with the main oil conveying pipeline; a quick cylinder electromagnetic reversing valve 12 is connected in parallel with the pressurizing electro-hydraulic reversing valve 11 on the main oil conveying pipeline; a pressure gauge 10 is connected on the main oil conveying pipeline at a position between the high-pressure pressurizing one-way valve 7 and the pressurizing electro-hydraulic reversing valve 11 through a pressure measuring connector 9; the quick cylinder electromagnetic reversing valve 12 is connected with an oil inlet and an oil outlet of a quick oil cylinder 18 through a pipeline; the pressurizing electro-hydraulic reversing valve 11 is connected with an oil inlet of the plunger cylinder 16 and an oil inlet of a control electromagnetic reversing valve 17; a high-pressure liquid filling valve 15 is arranged on a pipeline between the control electromagnetic reversing valve 17 and a pressure charging tank 19; a low-pressure liquid filling valve 14 is arranged on a branch pipeline between the plunger cylinder 16 and the oil tank 1; an oil outlet of the control electromagnetic reversing valve 17 is connected with the high-pressure liquid filling valve 15 and the low-pressure liquid filling valve 14 respectively; the high-pressure liquid filling valve 15 is connected with a lower cavity of the plunger cylinder 16 through a pipeline; the pressure charging tank 19 is communicated with the oil tank 1 through a pipeline and is connected with an external air source through a pneumatic one-way valve 21; the pressurizing electro-hydraulic reversing valve 11, the quick cylinder electromagnetic reversing valve 12 and the control electromagnetic reversing valve 17 are connected with the oil tank 1 through respective oil return pipelines; and the quick oil cylinder 18 has two cylinders arranged side by side.
[0023] The working process and working principle of the utility model are as follows:
[0024] The motor 6 drives the hydraulic oil pump 5, and the hydraulic oil is pumped into the main oil pipeline. The electromagnetic overflow valve 8 adjusts the pump pressure. The pressure gauge 10 is connected to the main oil pipeline through the pressure connection 9 to display the pump pressure. The oil pump 5 here is mainly to supply oil to the plunger cylinder 16 and the quick cylinder 18; when the quick cylinder 18 goes up, the electromagnetic overflow valve 8 acts to increase the pressure. The right reversing valve 12b of the quick cylinder electromagnetic reversing valve 12 is electrified, and the hydraulic oil enters the lower cavity of the quick cylinder 18. The quick cylinder 18 drives the plunger cylinder 16 to quickly go up. The lower cavity of the plunger cylinder 16 forms a vacuum, and at the same time, the right reversing valve 11b of the pressure increasing and controlling electromagnetic reversing valve 11 is electrified, and the right reversing valve 17b of the control electromagnetic reversing valve 17 is electrified to open the low-pressure filling valve 14. The hydraulic oil is filled into the lower cavity of the plunger cylinder 16. Since the oil cylinder is very large, the space is not full when the oil is naturally filled, so when the plunger cylinder 16 is in place, the right reversing valve 11b of the pressure increasing and controlling electromagnetic reversing valve 11 is electrified, and the left reversing valve 17a of the control electromagnetic reversing valve 17 is electrified to open the high-pressure filling valve 15 to connect the pressure filling tank 19 and the lower cavity of the plunger cylinder 16, and quickly fill the hydraulic oil into the lower cavity of the plunger cylinder. When the quick cylinder 18 goes down: the electromagnetic overflow valve 8 acts, the left reversing valve 12a of the quick cylinder electromagnetic reversing valve 12 is electrified, and at the same time, the right reversing valve 11b of the pressure increasing and controlling electromagnetic reversing valve 11 and the right reversing valve 17b of the control electromagnetic reversing valve 17 are electrified. The quick cylinder 18 drives the plunger cylinder 16 to quickly descend.
Claims
1. The hydraulic system of a fast oil feed press comprising an oil tank (1), an oil inlet (3), characterized in that The oil pump (5) is arranged on the main oil conveying pipeline between the oil tank (1) and the plunger cylinder (16), the quick cylinder electromagnetic reversing valve (12) and the pressurized electro-hydraulic reversing valve (11) are connected in parallel on the main oil conveying pipeline, the quick cylinder electromagnetic reversing valve (12) is connected with the oil inlet and the oil outlet of the quick oil cylinder (18) through a pipeline, the pressurized electro-hydraulic reversing valve (11) is connected with the oil inlet of the plunger cylinder (16) and the oil inlet of the control electromagnetic reversing valve (17), the high-pressure liquid filling valve (15) is arranged on the pipeline between the control electromagnetic reversing valve (17) and the pressurized oil tank (19), the low-pressure liquid filling valve (14) is arranged on the branch pipeline between the plunger cylinder (16) and the oil tank (1), the oil outlet of the control electromagnetic reversing valve (17) is connected with the high-pressure liquid filling valve (15) and the low-pressure liquid filling valve (14) respectively, and the high-pressure liquid filling valve (15) is connected with the lower cavity of the plunger cylinder (16) through a pipeline.
2. The high speed power and feed lubrication press hydraulic system according to claim 1, characterized in that The pressurized one-way valve (7), the pressurized electro-hydraulic reversing valve (11) and the hydraulic control one-way valve (13) are sequentially arranged on the main oil conveying pipeline between the oil tank (1) and the plunger cylinder (16), and the main oil conveying pipeline between the pressurized one-way valve (7) and the pressurized electro-hydraulic reversing valve (11) is communicated with the oil tank (1) through a branch pipeline.
3. The hydraulic system of a high speed power and lube press of claim 2 wherein The branch pipeline is provided with the electromagnetic overflow valve (8), and the electromagnetic overflow valve (8) is communicated with the main oil conveying pipeline.
4. The high speed power and feed lubrication system of claim 1 wherein The pipeline, in which the pressurized oil tank (19) is communicated with the oil tank (1), is provided with the safety one-way valve (20), and the pressurized oil tank (19) is connected with an external air source through the pneumatic one-way valve (21).
5. The high speed power and feed lubrication system of claim 1 wherein The pressurized electro-hydraulic reversing valve (11), the quick cylinder electromagnetic reversing valve (12) and the control electromagnetic reversing valve (17) are connected with the oil tank (1) through respective oil return pipes.
6. The high speed power and feed lubrication system of claim 1 wherein The oil pump (5) is connected with the motor (6) through a shaft.
7. The hydraulic system of a high speed power and lube press of claim 1, 2, 4 or 5 wherein The oil tank (1) is provided with the visual liquid level meter (4).
8. The high speed power and feed lubrication system of claim 7, wherein The oil tank (1) is provided with the oil suction filter (2).
9. The hydraulic system of a high speed power and lube press of claim 1 or 2, wherein The pressure gauge (10) is connected with the pressurized one-way valve (7) and the pressurized electro-hydraulic reversing valve (11) through the pressure measuring connector (9) on the main oil conveying pipeline.
10. The high speed power and flood coining press hydraulic system of claim 1 wherein The quick oil cylinder (18) has two cylinders arranged side by side.