CN114472781A - Liquid filling system for free forging press - Google Patents
Liquid filling system for free forging press Download PDFInfo
- Publication number
- CN114472781A CN114472781A CN202210100088.9A CN202210100088A CN114472781A CN 114472781 A CN114472781 A CN 114472781A CN 202210100088 A CN202210100088 A CN 202210100088A CN 114472781 A CN114472781 A CN 114472781A
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- oil tank
- liquid
- oil
- filled
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses a liquid filling system for a free forging press, which belongs to the technical field of free forging presses and comprises a liquid filling oil tank positioned at the top of forging workshop equipment and a main oil tank positioned on the ground of a power room; an air filter is arranged on the main oil tank; the main oil tank is communicated with the liquid-filled oil tank through an air pipeline; the main oil tank is communicated with the liquid-filled oil tank through an oil discharge pipeline; a valve is arranged on the oil discharge pipeline; the valve is a pneumatic stop valve. The invention can realize the arbitrary liquid level height control of the liquid-filled oil tank so as to match the oil filling/discharging requirements under different production processes, and meanwhile, when danger occurs, the pneumatic stop valve can be quickly opened to quickly empty the oil liquid in the liquid-filled oil tank, thereby avoiding fire; an air filter for air intake and exhaust of the liquid-filled oil tank is eliminated, a special air pipe is added to be communicated with the main oil tank to realize air pressure balance between the liquid-filled oil tank and the main oil tank, and oil discharge resistance caused by a vacuum trend generated by oil discharge from the liquid-filled oil tank to the main oil tank and a pressurization trend generated by oil inlet from the main oil tank is avoided.
Description
Technical Field
The invention belongs to the technical field of free forging presses, and particularly relates to a liquid filling system for a free forging press.
Background
As is well known, the working condition of the free forging press is quite severe, the tapping temperature of the hot forged piece is about 1000 ℃, and the dust generated by forging is large in the working process. If the liquid filling system at the top end of the press leaks oil, the oil is in contact with the hot forging piece, and a fire disaster easily occurs. Referring to fig. 2, when the working environment is dusty, the dust is easy to enter the oil tank through the air filter of the conventional liquid filling system, and the oil is polluted. Meanwhile, the traditional liquid filling system discharges oil at a fixed position (namely the upper half part of the side wall of the liquid filling oil tank), when the press moves downwards by pressing, the oil liquid in the liquid filling oil tank is not sucked into the oil cylinder, and when the pressing return stroke is finished, the oil liquid pumped into the oil cylinder by the main oil tank is completely pushed into the liquid filling oil tank. The oil can be discharged only when the liquid level reaches the fixed oil discharge hole, and the liquid level hole must be arranged at a high position in order to ensure that the oil suction of the sliding block is sufficient normally and quickly, and also ensure enough oil discharge buffer space. Therefore, the conventional fixed-position oil discharge type liquid charging oil tank needs to be made large enough to ensure safe use, the volume and the oil discharge pipe diameter of the oil tank are increased, and the manufacturing cost is increased. When the equipment returns to move, the oil discharge is maximum, the problem of high liquid level alarm often occurs, the returning speed can only be reduced, and even the returning movement is stopped, so that the beat of the forging machine is influenced. The liquid-filled oil tank has a great height difference with the ground generally, when oil is not discharged, the whole pipeline is filled with air, the free falling body of the oil liquid causes disturbance impact on the oil liquid of the ground main oil tank and is mixed with a large amount of bubbles, and the oil pump generates cavitation after being sucked, thereby damaging system elements. In view of the defects of potential safety hazard and easy pollution of the conventional liquid filling system, the targeted improvement design is carried out.
Disclosure of Invention
The invention provides a liquid filling system for a free forging press, which aims to solve the technical problems in the prior art, avoid the pollution of oil liquid by dust in the forging environment, increase the emergency plan of accidental fire, avoid the mixing of a large amount of bubbles in a main oil tank and reduce the volume and the manufacturing cost of the liquid filling system.
The invention aims to provide a liquid filling system for a free forging press, which comprises a liquid filling oil tank (1) positioned at the top of forging workshop equipment, and a main oil tank (5) positioned on the ground of a power room;
an air filter (4) is arranged on the main oil tank (5);
the main oil tank (5) is communicated with the liquid-filled oil tank (1) through an air pipeline (2);
the main oil tank (5) is communicated with the liquid-filled oil tank (1) through an oil discharge pipeline (3);
a valve is arranged on the oil discharge pipeline (3);
and the controller is used for controlling the opening of the valve according to the production process requirement.
Preferably, the valve is a pneumatic valve (6).
Preferably, the top of the main oil tank (5) is connected with an air pipeline (2).
Preferably, the air pipeline (2) is connected with the top of the liquid filling oil tank (1).
Preferably, the air pipeline (2) is connected with the top of the side wall of the liquid filling oil tank (1).
Preferably, the bottom of the main oil tank (5) is connected with an oil discharge pipeline (3).
Preferably, the bottom of the side wall of the main oil tank (5) is connected with an oil discharge pipeline (3).
Preferably, the oil discharge pipeline (3) is connected with the bottom of the liquid filling oil tank (1).
Preferably, the oil discharge pipeline (3) is connected with the bottom of the side wall of the liquid filling oil tank (1).
The invention has the advantages and positive effects that:
according to the invention, the hole is formed at the bottom or the side wall bottom of the liquid-filled oil tank, and the liquid-filled oil tank is connected with the main oil tank through the pipeline and the pneumatic main control stop valve, so that the arbitrary liquid level height control of the liquid-filled oil tank can be realized to match the oil filling/discharging requirements under different production processes, and meanwhile, when danger occurs, the pneumatic stop valve can be quickly opened to quickly discharge the oil liquid in the liquid-filled oil tank, so that the fire is avoided; an air filter for air intake and exhaust of the liquid-filled oil tank is eliminated, a special air pipe is added to be communicated with the main oil tank to realize air pressure balance between the liquid-filled oil tank and the main oil tank, and oil discharge resistance caused by a vacuum trend generated by oil discharge from the liquid-filled oil tank to the main oil tank and a pressurization trend generated by oil inlet from the main oil tank is avoided. Meanwhile, the air filter of the main oil tank in the clean power room meets the air inlet and exhaust requirements of the liquid-filled oil tank, and the oil is prevented from being polluted by dust in a forging environment;
the oil discharge pipeline is filled with oil liquid whether in an oil discharge state or not, is slowly opened during oil discharge, has no impact and no air bubble, avoids impact and air-powered mixing caused by free falling of the oil liquid from a high position in a conventional fixed oil discharge type liquid filling system (the normal pipeline is empty), avoids cavitation caused by air bubble suction of a hydraulic system, and prolongs the service life of system elements; the liquid-filling system has the oil-discharging capacity of any point position of the oil-discharging point position, so that the oil-discharging process of the system can be integrated into the whole process action of the equipment, an oil-discharging buffer zone and oil-discharging waiting are not needed, and the conventional fixed oil-discharging and liquid-filling system can only discharge oil when the liquid level reaches a fixed oil-discharging hole at the high position of a liquid-filling oil tank in the return stroke of an equipment sliding block. The liquid filling oil tank of the novel liquid filling system cancels an oil discharge buffer zone, reduces the path of an oil discharge pipeline, reduces about 35 percent of weight compared with the conventional liquid filling system, and saves the cost.
The oil discharge pipe orifice is designed at the bottommost part of the liquid filling oil tank or the bottom of the side wall, and the liquid level of the oil tank is controlled through a pneumatic butterfly valve, so that the liquid level of the liquid filling oil tank is kept at a set ideal position and is convenient to regulate and control; when the oil tank is maintained or in emergency, the liquid-filled oil tank can be quickly emptied through the pneumatic butterfly valve, so that the operation is convenient and safe.
An air filter is not separately designed in the liquid-filled oil tank, so that the phenomenon that forging dust enters the liquid-filled oil tank in a workshop to cause oil pollution is avoided; the air pipe is communicated with the main oil tank, so that the liquid-filled oil tank can be ensured to absorb clean air from the main oil tank, the air pressure balance between the main oil tank and the liquid-filled oil tank can be kept, the oil in the liquid-filled oil tank can conveniently flow back to the main oil tank at a stable flow speed, and the phenomenon of unsmooth oil discharge caused by air pressure difference generated when the conventional independent liquid-filled oil tank discharges oil to the main oil tank is avoided.
This application adopts independent oil extraction structure, can carry out the oil extraction action according to the change of liquid filling oil tank liquid level when the press carries out any action. The oil discharge triggering interval can cover the whole height interval of the liquid filling oil tank instead of the upper end of the oil tank, so that the liquid filling oil tank does not need an oil discharge buffering space any more, the volume of the oil tank can be reduced by about 35%, and the cost is saved.
This application can be according to the operating speed of press, and the oil extraction position and the oil extraction speed of initiative regulation, the full proportional control of pneumatic valve can match with the production technology of different work pieces, and the oil extraction process is gone in merging whole technology action, and no oil extraction waits, ensures can not influence the beat.
Because the pneumatic stop valve is arranged at the bottom of the main oil tank, the oil drainage pipeline is always filled with oil no matter whether oil is drained or not, and when oil drainage is triggered, the pneumatic stop valve can realize the control of any opening degree of 0-100% through the analog quantity control module, so that flexible oil drainage is realized. The water hammer effect and the gas mixing are avoided, and the use experience and the element service life of the press are improved to a certain extent.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
fig. 2 is a schematic structural diagram of a conventional technique.
Wherein: 1. a liquid-filled oil tank; 2. an air duct; 3. an oil discharge pipe; 4. an air filter; 5. a main oil tank; 6. and (4) a pneumatic stop valve.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1, the technical solution of the present invention is:
a liquid filling system for a free forging press comprises a liquid filling oil tank 1 positioned at the top of equipment of a forging shop, a main oil tank 5 positioned on the ground of a power room;
an air filter 4 is arranged on the main oil tank 5;
the main oil tank 5 is communicated with the liquid-filled oil tank 1 through an air pipeline 2;
the main oil tank 5 is communicated with the liquid-filled oil tank 1 through an oil discharge pipeline 3;
a valve is arranged on the oil discharge pipeline 3;
and the controller is used for controlling the opening of the valve according to the production process requirement.
In the preferred embodiment, the valve is a pneumatic shut-off valve 6. The controller is preferably a PLC; in the actual use process, according to different process requirements, the opening degree of the pneumatic stop valve 6 is controlled through the PLC, and then the working state of the oil discharge pipeline 3 is realized;
in the preferred embodiment, the original independent air filter of the liquid-filled oil tank 1 is eliminated and replaced by the air pipeline 2, the air channels of the liquid-filled oil tank and the main oil tank are communicated, and the liquid-filled oil tank and the main oil tank share the air filter 4; the bottom of the liquid filling oil tank 1 is provided with a hole and is communicated with the main oil tank 5 through the oil discharge pipeline 3 and the pneumatic stop valve 6, so that the liquid level of the liquid filling oil tank can be controlled in real time, and the dynamic balance of the liquid level of the liquid filling oil tank is realized.
The top of the main oil tank 5 is connected with the air pipeline 2.
The air pipeline 2 is connected with the top of the liquid filling oil tank 1 or the top of the side wall.
The bottom or the bottom of the side wall of the main oil tank 5 is connected with an oil discharge pipeline 3.
The oil discharge pipeline 3 is connected with the bottom of the liquid filling oil tank 1 or the bottom of the side wall.
According to the invention, the hole is formed at the bottom or the side wall bottom of the liquid-filled oil tank, and the hole is connected with the main oil tank through the oil discharge pipeline and the pneumatic stop valve, so that when danger occurs, the pneumatic stop valve 6 can be quickly opened to quickly empty the oil in the liquid-filled oil tank 1, and a fire disaster is avoided; an air filter for air intake and exhaust of the liquid-filled oil tank is eliminated, a special air pipeline is added to be communicated with the main oil tank, the air intake and exhaust requirements of the liquid-filled oil tank are met through the air filter of the main oil tank in the cleaning power room, and the oil is prevented from being polluted by dust in a forging environment.
The oil discharge pipe orifice is designed at the bottommost part of the liquid filling oil tank or the bottom of the side wall, and the liquid level of the oil tank is controlled through a pneumatic stop valve (such as a pneumatic butterfly valve), so that the liquid level of the liquid filling oil tank is kept at a set ideal position and is convenient to regulate and control; when the oil tank is maintained or in emergency, the liquid-filled oil tank can be quickly emptied through the pneumatic butterfly valve, so that the operation is convenient and safe.
An air filter is not separately designed in the liquid-filled oil tank, so that the phenomenon that forging dust enters the liquid-filled oil tank in a workshop to cause oil pollution is avoided; the air pipe is communicated with the main oil tank, so that the liquid-filled oil tank can be ensured to absorb clean air from the main oil tank, the air pressure balance between the main oil tank and the liquid-filled oil tank can be kept, the oil in the liquid-filled oil tank can conveniently flow back to the main oil tank at a stable flow speed, and the phenomenon of unsmooth oil discharge caused by air pressure difference generated when the conventional independent liquid-filled oil tank discharges oil to the main oil tank is avoided.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. A liquid filling system for a free forging press comprises a liquid filling oil tank (1) positioned at the top of forging workshop equipment, and a main oil tank (5) positioned on the ground of a power room; the method is characterized in that:
an air filter (4) is arranged on the main oil tank (5);
the main oil tank (5) is communicated with the liquid-filled oil tank (1) through an air pipeline (2);
the main oil tank (5) is communicated with the liquid-filled oil tank (1) through an oil discharge pipeline (3);
a valve is arranged on the oil discharge pipeline (3);
and the controller is used for controlling the opening of the valve according to the production process requirement.
2. The charging system for free forging presses according to claim 1, characterized in that the valve is a pneumatic shut-off valve (6).
3. The charging system for free forging presses according to claim 1, characterized in that the top of the main oil tank (5) is connected with an air pipe (2).
4. The charging system for free forging presses according to claim 1, characterized in that the air pipe (2) is connected with the top of the charging tank (1).
5. The charging system for free forging presses according to claim 1, characterized in that the air pipe (2) is connected with the top of the side wall of the charging tank (1).
6. The charging system for free forging presses according to claim 1, characterized in that the bottom of the main oil tank (5) is connected with an oil drain pipe (3).
7. The charging system for free forging presses according to claim 1, characterized in that the bottom of the side wall of the main oil tank (5) is connected with an oil drain pipe (3).
8. The charging system for free forging presses according to claim 1, characterized in that the oil drain pipe (3) is connected to the bottom of the charging oil tank (1).
9. The charging system for free forging presses according to claim 1, characterized in that the oil drain pipe (3) is connected to the bottom of the side wall of the charging oil tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210100088.9A CN114472781A (en) | 2022-01-27 | 2022-01-27 | Liquid filling system for free forging press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210100088.9A CN114472781A (en) | 2022-01-27 | 2022-01-27 | Liquid filling system for free forging press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114472781A true CN114472781A (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210100088.9A Pending CN114472781A (en) | 2022-01-27 | 2022-01-27 | Liquid filling system for free forging press |
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| JPH1082469A (en) * | 1996-09-06 | 1998-03-31 | Mitsubishi Heavy Ind Ltd | High temperature gas cutoff valve |
| US20040216613A1 (en) * | 2001-07-23 | 2004-11-04 | Josef Altmann | Device for reducing the gas and water contamination of transformer oil filling |
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| CN112268027A (en) * | 2020-11-03 | 2021-01-26 | 中国重型机械研究院股份公司 | Quick liquid filling system and method for multi-main working plunger cylinder of large die forging press for changing water into oil |
| CN212694965U (en) * | 2020-07-29 | 2021-03-12 | 国网湖北省电力有限公司直流运检公司 | Transformer conservator initiative oil extraction system |
-
2022
- 2022-01-27 CN CN202210100088.9A patent/CN114472781A/en active Pending
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| CN112268027A (en) * | 2020-11-03 | 2021-01-26 | 中国重型机械研究院股份公司 | Quick liquid filling system and method for multi-main working plunger cylinder of large die forging press for changing water into oil |
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