CN202621804U - Large-through diameter pressure relief system for free forging oil hydraulic press - Google Patents
Large-through diameter pressure relief system for free forging oil hydraulic press Download PDFInfo
- Publication number
- CN202621804U CN202621804U CN 201220287531 CN201220287531U CN202621804U CN 202621804 U CN202621804 U CN 202621804U CN 201220287531 CN201220287531 CN 201220287531 CN 201220287531 U CN201220287531 U CN 201220287531U CN 202621804 U CN202621804 U CN 202621804U
- Authority
- CN
- China
- Prior art keywords
- valve
- hydraulic press
- pressure
- pressure relief
- way throttle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Abstract
The utility model provides a large-through diameter pressure relief system for a free forging oil hydraulic press, and relates to an oil pressure machine. The large-through diameter pressure relief system is arranged on the upper part of the oil hydraulic press, an inlet is connected with an oil cylinder, and an outlet is inserted into an upper oil tank directly; and a one-way throttle valve on a main valve is different from the common cartridge valve, and the through diameter of the common cartridge valve is increased. In a valve block structure, a cartridge valve for reversed flow is connected between an adjustable one-way throttle valve and a proportion pilot valve, and one end of the cartridge valve is connected with a pressure adjustable liquid control reversing valve; and according to the valve structure, an independent pressure relief valve is adopted instead of two cartridge proportioning valves which are connected in parallel. According to the large-through diameter pressure relief system, due to the adoption of a technology of releasing pressure from high speed to low speed in three levels, the pressure can be reduced quickly, vibration is avoided, and the oil hydraulic press runs stably; and due to the adoption of the independent pressure relief valve which is produced domestically, the size is reduced, outsourcing is avoided, and the cost is saved.
Description
Technical field
The utility model relates to a kind of oil pressure machinery.
Background technology
A key technology of flat-die forging hydraulic press is release, will in second the pressure in the cylinder be reduced rapidly at 0.15-0.3 after the press pressurization, and not allow to produce vibrations.At present domestic big latus rectum pressure-relief valve piece is to be made up of two plug-in proportioning valves and a check valve-type prefill valve, and the plug-in proportioning valve is a parallel-connection structure, and volume is big, and the plug-in proportioning valve is imported product, costs an arm and a leg.
Summary of the invention
The purpose of the utility model provides the big latus rectum depressurized system of flat-die forging hydraulic press that a kind of volume is little, cost is low and stable performance is good, to solve problems such as prior art products is bulky, imported product costs an arm and a leg.
The utility model is mainly by the heavy caliber inserted valve, form with adjustable one-way throttle valve and proportional pilot valve that inserted valve is connected successively; Solve technical scheme that its technical problem adopts for this reason the pressure-relief valve piece of big latus rectum be arranged on hydraulic press top; Import is connected with oil cylinder; Outlet straight cutting top tank, thus realized one-way flow; One-way throttle valve on the main valve is different from general inserted valve, but the latus rectum of general inserted valve is strengthened.But be connected with the inserted valve of reverse flow in the valve block structure between adjustable one-way throttle valve and the proportional pilot valve, a wherein end of inserted valve connects the pilot operated directional control valve of adjustable pressure, thereby realizes multistage release; Not by two plug-in proportioning valve parallel connections on this valve arrangement, but adopted an independently pressure-relief valve.
Adopt the good effect of the utility model to be:
1, the utility model can provide the pressure-relief valve of in the world maximum Dg200, is not to be together in parallel by two plug-in proportioning valves on this valve arrangement, but with a pressure-relief valve independently; Reduced volume; And this valve is domestic production, has avoided outsourcing, provides cost savings.
What 2, adopt is three grades of releases; From high pressure to the pressure release slower, it is very fast therefrom to be pressed onto the low pressure release, the promptly so-called elder generation fast technology in slow back; Compare with the pressure-relief valve of existing domestic flat-die forging hydraulic press on the structure; Both satisfied and reduce pressure rapidly, do not produce the need of work of vibrations, and avoided outsourcing again, thereby provided cost savings.
3, the release time was not shaken about 0.2 second, and press operates steadily.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described further:
Fig. 1 is the rapid multistage discharge system sketch map of the utility model;
Among the figure: 1 inserted valve, 2 one-way throttle valves, 3 proportional pilot valve, 4 pilot operated directional control valves, 5 reverse flow inserted valves.
The specific embodiment
As shown in Figure 1: the big latus rectum depressurized system of flat-die forging hydraulic press; Main by heavy caliber inserted valve 1, form with adjustable one-way throttle valve 2 and proportional pilot valve 3 that inserted valve 1 is connected successively; But be connected with the inserted valve 5 of reverse flow between adjustable one-way throttle valve 2 and the proportional pilot valve 3, but a wherein end of the inserted valve 5 of reverse flow is connected with the pilot operated directional control valve 4 of adjustable pressure, this depressurized system is arranged on hydraulic press top; Import is connected with oil cylinder, outlet straight cutting top tank.
Rapid multistage discharge system by heavy caliber (Dg200) but the pilot operated directional control valve 4 of inserted valve 1, adjustable one-way throttle valve 2, proportional pilot valve 3, adjustable pressure and the inserted valve 5 of reverse flow are formed; Proportional pilot valve 3 changes proportion pilot into by common guide; Whole system comprises technology such as unloading earlier back quick-release, one-way flow and release nearby slowly; Total release time is at 0.2 second, and system do not vibrate, thereby can realize rapid forge.The Dg200 pressure-relief valve has adopted the fast release technology in first slow back, and the one-way throttle valve on the main valve is different from general inserted valve, but the latus rectum of general inserted valve is strengthened.When opening main valve, turn choke valve down and make high pressure be discharged to middle pressure like this, thereby realize slow earlier technology, after pressing in being discharged to, but the inserted valve 5 of reverse flow open, but pressure oil is realized quick-release from inserted valve 5 reverse flow of reverse flow.Adopt the internal control pilot operated directional control valve; Make the oil cylinder internal pressure directly control this pilot operated directional control valve, and this valve is as long as a switching-over, pressure-relief valve is reverse flow automatically just; Accelerate release speed through excessive check valve; Therefore can realize the technology that the back is fast, this valve can be received oil cylinder and fuel tank nearby simultaneously, has realized the technology of one-way flow and release nearby.
Claims (2)
1. big latus rectum depressurized system of flat-die forging hydraulic press; Main by the heavy caliber inserted valve, form with adjustable one-way throttle valve and proportional pilot valve that inserted valve is connected successively; It is characterized in that this system is arranged on hydraulic press top, import is connected with oil cylinder, outlet straight cutting top tank; The inserted valve latus rectum that one-way throttle valve adopted on the main valve strengthens, but is connected with the inserted valve of reverse flow between adjustable one-way throttle valve and the proportional pilot valve in the valve block structure, and a wherein end of inserted valve connects the pilot operated directional control valve of adjustable pressure.
2. the big latus rectum depressurized system of flat-die forging hydraulic press as claimed in claim 1 is characterized in that on the inserted valve structure it not being by two plug-in proportioning valve parallel connections, but has adopted an independently pressure-relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287531 CN202621804U (en) | 2012-06-19 | 2012-06-19 | Large-through diameter pressure relief system for free forging oil hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287531 CN202621804U (en) | 2012-06-19 | 2012-06-19 | Large-through diameter pressure relief system for free forging oil hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202621804U true CN202621804U (en) | 2012-12-26 |
Family
ID=47375047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220287531 Expired - Lifetime CN202621804U (en) | 2012-06-19 | 2012-06-19 | Large-through diameter pressure relief system for free forging oil hydraulic press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202621804U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307953A (en) * | 2014-08-29 | 2015-01-28 | 武汉华夏精冲技术有限公司 | Multistage unloading loop control system for large-tonnage full-automatic hydraulic fine blanking press |
| CN104564920A (en) * | 2014-11-19 | 2015-04-29 | 天水锻压机床(集团)有限公司 | System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing |
| CN113351817A (en) * | 2021-04-30 | 2021-09-07 | 天津市天锻压力机有限公司 | Flexible control method of forging press |
-
2012
- 2012-06-19 CN CN 201220287531 patent/CN202621804U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307953A (en) * | 2014-08-29 | 2015-01-28 | 武汉华夏精冲技术有限公司 | Multistage unloading loop control system for large-tonnage full-automatic hydraulic fine blanking press |
| CN104564920A (en) * | 2014-11-19 | 2015-04-29 | 天水锻压机床(集团)有限公司 | System for controlling pressure relief and return stroke of plate shearing machine swaging oil cylinder on the basis of electro-hydraulic proportional reversing |
| CN113351817A (en) * | 2021-04-30 | 2021-09-07 | 天津市天锻压力机有限公司 | Flexible control method of forging press |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202901414U (en) | Novel pressure release valve | |
| CN202621804U (en) | Large-through diameter pressure relief system for free forging oil hydraulic press | |
| CN205001263U (en) | Energy -conserving pump station of infinitely variable control variable | |
| CN204677523U (en) | Sugarcane harvesting machine hydraulic system and sugar-cane cutting machine | |
| CN201776935U (en) | Hydraulic machine with two sets of hydraulic system structures | |
| CN203384136U (en) | Speed exchange circuit with parallel speed control valves | |
| CN202900841U (en) | Hydraulic pump station | |
| CN101987334A (en) | High-low pressure buffer system | |
| CN203775722U (en) | Steering-first hydraulic working system of harvesting machinery | |
| CN201739265U (en) | Single triple fixed displacement pump oil supply device for development machine | |
| CN205329745U (en) | Two operation mode control systems of leveler | |
| CN201944036U (en) | Energy-conservation hydraulic system for loader | |
| CN204985114U (en) | Multistage two effect sleeve hydro -cylinder hydraulic circuit of flat push tipper | |
| CN203174660U (en) | Load-sensitive control system of loading machine | |
| CN204113810U (en) | A kind of high-pressure high-flow Sealing test system | |
| CN203384138U (en) | Speed exchange circuit with serially-connected speed control valves | |
| CN103114624A (en) | Load-sensitive operation system of loading machine | |
| CN202767158U (en) | Hydraulic excavator flow out of valve regenerating device | |
| CN203239686U (en) | Oil supplementing system for hydraulic motor | |
| CN201982415U (en) | Dynamic parameter matching control device for multiplex reversing valve and hydraulic oil cylinder | |
| CN103775439A (en) | Hydraulic pump station | |
| CN201871658U (en) | High-speed cold forging hydraulic press | |
| CN202846939U (en) | High-speed hydraulic machine dynamic stepping control system | |
| CN204627891U (en) | A kind of engine fuel transfer pump | |
| CN102935452B (en) | Full-hydraulic type punch press |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |