CN108443255B - Control cover plate for buffering and unloading main pump of ten thousand-ton free forging press - Google Patents
Control cover plate for buffering and unloading main pump of ten thousand-ton free forging press Download PDFInfo
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- CN108443255B CN108443255B CN201810366884.0A CN201810366884A CN108443255B CN 108443255 B CN108443255 B CN 108443255B CN 201810366884 A CN201810366884 A CN 201810366884A CN 108443255 B CN108443255 B CN 108443255B
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- way electromagnetic
- cover plate
- electromagnetic valve
- valve
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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
- 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
- F15B13/025—Pressure reducing valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a control cover plate for buffering and unloading a main pump of a ten-thousand-ton free forging press, which comprises: the device comprises a two-position four-way electromagnetic valve, a cover plate, a cartridge valve, a first damping screw and a second damping screw; the cover plate is provided with three oil ports which are in one-to-one correspondence with the oil ports P, B and T of the two-position four-way solenoid valve; during forging and pressing, the two-position four-way electromagnetic valve is electrified and reversed, a P-B oil port of the two-position four-way electromagnetic valve is communicated, pilot control oil of the cartridge valve flows through a P-B cavity of the two-position four-way electromagnetic valve from an X-P channel of the cover plate and finally enters a middle cavity of the cover plate, a second cavity damping screw presses the valve core, the cartridge valve is closed, and main pump incoming oil enters a system to realize pressing; when the pressing is finished, the two-position four-way electromagnetic valve is powered off, a B-T oil port of the two-position four-way electromagnetic valve is connected, pilot oil of a valve core of the cartridge valve flows back to an oil tank through the B-T oil port of the two-position four-way electromagnetic valve and the first damping screw, and the throttling hole diameter of the first damping screw is smaller than the throttling hole diameter of the second damping screw.
Description
Technical Field
The invention is applied to the technical field of unloading control blocks at the outlet of a main pump of a free forging press, and particularly relates to a control cover plate for buffering and unloading of the main pump of a ten-thousand-ton free forging press.
Background
With the continuous development of equipment manufacturing capability in China, the number of ten thousand-ton free forging presses in China is continuously increased. The ten thousand-ton free forging press is high in speed, the flow of a main pump is large, when forging is finished, particularly when a upsetting process is finished, the main pump is unloaded in a high-pressure large-flow state, the pipeline impact is heavy, the noise is large, the vibration is large, a pipeline welded junction is cracked frequently, and the use stability of equipment is seriously influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the patent provides a control cover plate for buffering and unloading of a main pump of a ten-thousand-ton free forging press, which is used on an unloading control block at the outlet of a pump and used for controlling a valve core of a cartridge valve to be slowly opened during unloading, so that the impact during high-pressure large-flow unloading is reduced, and the use stability of equipment is improved.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:
a ten thousand tons of control cover plates for buffering and unloading of the main pump of the free forging press at least comprise:
the two-position four-way electromagnetic valve comprises a two-position four-way electromagnetic valve (4), a cover plate (2), a cartridge valve (1), a first damping screw (3) and a second damping screw (5); wherein: the cover plate (2) is provided with three oil ports which are in one-to-one correspondence with the oil ports P, B and T of the two-position four-way solenoid valve (4); during forging and pressing, the two-position four-way electromagnetic valve (4) is electrified and reversed, a P-B oil port of the two-position four-way electromagnetic valve (4) is communicated, pilot control oil of the cartridge valve (1) flows through a P-B cavity of the two-position four-way electromagnetic valve (4) from an X-P channel of the cover plate (2) and finally enters a middle cavity of the cover plate (2), a second cavity damping screw (5) presses a valve core, the cartridge valve (1) is closed, and oil coming from a main pump enters a system to realize pressing; when the pressing is finished, the two-position four-way electromagnetic valve (4) is powered off, a B-T oil port of the two-position four-way electromagnetic valve (4) is communicated, pilot oil of a valve core of the cartridge valve (1) flows back to an oil tank through the B-T oil port of the two-position four-way electromagnetic valve (4) and a first damping screw (3) in the cover plate (2), the throttling hole diameter of the first damping screw (3) is smaller than that of a second damping screw (5), and the pilot oil returns to the oil tank under the throttling resistance.
The invention has the advantages and positive effects that:
by adopting the technical scheme, the two-position four-way electromagnetic valve is used on the pump outlet unloading control block, when the two-position four-way electromagnetic valve is used, ｃA normal P-A two-position four-way electromagnetic valve is combined on ｃA cover plate to be used as ｃA pilot control valve, and the cover plate is provided with P, B, T oil ports which are in one-to-one correspondence with P, B, T oil ports of the two-position four-way electromagnetic valve 4. During forging and pressing, the two-position four-way solenoid valve is electrified and reversed, a P-B oil port of the two-position four-way solenoid valve is communicated, pilot control oil of the cartridge valve flows through an X-P channel of the cover plate, flows through a P-B cavity of the two-position four-way solenoid valve, finally enters a middle cavity of the cover plate, passes through a middle second cavity damping screw and presses a valve core, the cartridge valve is closed, and incoming oil of a main pump enters a system to realize pressing; when the pressing is finished, the two-position four-way solenoid valve is powered off, the oil port B-T of the two-position four-way solenoid valve is connected, the pilot oil of the valve core of the cartridge valve flows back to the oil tank through the oil port B-T of the two-position four-way solenoid valve and the first damping screw in the cover plate, the throttle aperture of the first damping screw is much smaller than the throttle aperture of the second damping screw, the pilot oil returns to the oil tank under the throttle resistance, the valve core is opened slowly, the unloading speed of the high-pressure oil in the main pipeline is controlled, the impact of the high-pressure large-flow main pump during unloading is reduced.
The attached drawings of the specification:
FIG. 1 is a block diagram of a cover plate in a preferred embodiment of this patent;
FIG. 2 is a block diagram of a preferred embodiment of this patent;
FIG. 3 is a block diagram of the preferred embodiment of this patent with the main pump unloaded;
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following examples are illustrated, and the following detailed descriptions are given:
referring to fig. 1 to 3, a control cover plate for buffering and unloading a main pump of a ten-thousand-ton free forging press comprises:
the device comprises a two-position four-way electromagnetic valve 4, a cover plate 2, a cartridge valve 1, a first damping screw 3 and a second damping screw 5; wherein: the cover plate 2 is provided with three oil ports which are in one-to-one correspondence with the oil ports P, B and T of the two-position four-way solenoid valve 4; during forging and pressing, the two-position four-way electromagnetic valve 4 is electrified to change direction, a P-B oil port of the two-position four-way electromagnetic valve 4 is communicated, pilot control oil of the cartridge valve 1 flows through a P-B cavity of the two-position four-way electromagnetic valve 4 from an X-P channel of the cover plate 2 and finally enters a middle cavity of the cover plate 2, a valve core is pressed by a second cavity damping screw 5, the cartridge valve 1 is closed, and main pump incoming oil enters a system to realize pressing; when the pressing is finished, the two-position four-way solenoid valve 4 is powered off, a B-T oil port of the two-position four-way solenoid valve 4 is connected, pilot oil of a valve core of the cartridge valve 1 flows back to an oil tank through the B-T oil port of the two-position four-way solenoid valve 4 and a first damping screw 3 in the cover plate 2, the throttling aperture of the first damping screw 3 is smaller than that of a second damping screw 5, the pilot oil returns to bear throttling resistance, the valve core is opened slowly, the unloading speed of high-pressure oil in a main pipeline is controlled, the impact of the high-pressure large-flow main pump during unloading is reduced, and the running stability of equipment is improved.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (1)
1. The utility model provides a ten thousand tons of control apron of freely forging press main pump buffering off-load usefulness which characterized in that as for: at least comprises the following steps:
the two-position four-way electromagnetic valve comprises a two-position four-way electromagnetic valve (4), a cover plate (2), a cartridge valve (1), a first damping screw (3) and a second damping screw (5); wherein: the cover plate (2) is provided with three oil ports which are in one-to-one correspondence with the oil ports P, B and T of the two-position four-way solenoid valve (4); the oil port P of the two-position four-way electromagnetic valve (4) is an oil inlet; the oil port T of the two-position four-way electromagnetic valve (4) is an oil outlet; the oil port P of the cover plate (2) is an oil outlet, and the oil port T of the cover plate (2) is an oil inlet;
during forging and pressing, the two-position four-way electromagnetic valve (4) is electrified and reversed, a P-B oil port of the two-position four-way electromagnetic valve (4) is communicated, pilot control oil of the cartridge valve (1) flows through a P-B cavity of the two-position four-way electromagnetic valve (4) from an X-P channel of the cover plate (2) and finally enters a middle cavity of the cover plate (2), a second cavity damping screw (5) presses a valve core, the cartridge valve (1) is closed, and oil coming from a main pump enters a system to realize pressing; when the pressing is finished, the two-position four-way electromagnetic valve (4) is powered off, a B-T oil port of the two-position four-way electromagnetic valve (4) is communicated, pilot oil of a valve core of the cartridge valve (1) flows back to an oil tank through the B-T oil port of the two-position four-way electromagnetic valve (4) and a first damping screw (3) in the cover plate (2), the throttling hole diameter of the first damping screw (3) is smaller than that of a second damping screw (5), and the pilot oil returns to the oil tank under the throttling resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366884.0A CN108443255B (en) | 2018-04-23 | 2018-04-23 | Control cover plate for buffering and unloading main pump of ten thousand-ton free forging press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810366884.0A CN108443255B (en) | 2018-04-23 | 2018-04-23 | Control cover plate for buffering and unloading main pump of ten thousand-ton free forging press |
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| Publication Number | Publication Date |
|---|---|
| CN108443255A CN108443255A (en) | 2018-08-24 |
| CN108443255B true CN108443255B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810366884.0A Active CN108443255B (en) | 2018-04-23 | 2018-04-23 | Control cover plate for buffering and unloading main pump of ten thousand-ton free forging press |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112343884A (en) * | 2020-11-05 | 2021-02-09 | 北京航天发射技术研究所 | Two-stage pilot-controlled high-speed large-flow switch valve and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715604A (en) * | 2016-03-17 | 2016-06-29 | 南阳二机石油装备集团股份有限公司 | Hanging load control valve bank of all-hydraulic drill |
| CN107044466A (en) * | 2016-12-30 | 2017-08-15 | 天水锻压机床(集团)有限公司 | Arm bender special efficient energy-saving electric-hydraulic ratio system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06193750A (en) * | 1992-12-22 | 1994-07-15 | Komatsu Ltd | Hydraulic valve device |
| CN201650913U (en) * | 2010-04-09 | 2010-11-24 | 苏州大学 | Controllable simultaneous linkage hydraulic commutating circuit |
| CN205918670U (en) * | 2016-08-31 | 2017-02-01 | 山东泰丰液压股份有限公司 | Beat sign indicating number hydraulic press hydraulic control system |
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2018
- 2018-04-23 CN CN201810366884.0A patent/CN108443255B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715604A (en) * | 2016-03-17 | 2016-06-29 | 南阳二机石油装备集团股份有限公司 | Hanging load control valve bank of all-hydraulic drill |
| CN107044466A (en) * | 2016-12-30 | 2017-08-15 | 天水锻压机床(集团)有限公司 | Arm bender special efficient energy-saving electric-hydraulic ratio system |
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| CN108443255A (en) | 2018-08-24 |
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