CN201377483Y - Overpressure protection device for hydraulic cylinder - Google Patents
Overpressure protection device for hydraulic cylinder Download PDFInfo
- Publication number
- CN201377483Y CN201377483Y CN200920064071U CN200920064071U CN201377483Y CN 201377483 Y CN201377483 Y CN 201377483Y CN 200920064071 U CN200920064071 U CN 200920064071U CN 200920064071 U CN200920064071 U CN 200920064071U CN 201377483 Y CN201377483 Y CN 201377483Y
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- valve body
- valve
- protection device
- oil hydraulic
- 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 - Fee Related
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Abstract
The utility model relates to an overpressure protection device for a hydraulic cylinder, and a hydraulic cylinder technique which is mainly used in a hydraulic cylinder of metallurgical machinery for ensuring the pressure of a work cavity of the hydraulic cylinder below a set value and ensuring the safe use of equipment. The utility model realizes the aims through the method as follows: a cartridge valve core is mounted in a valve body, a valve cover is mounted above the valve body, an overflow valve is mounted in front of the valve body, a hydraulic control one-way valve is mounted on one side of the valve body, and a pressure relay and an energy accumulator are connected with the valve body by adapters. The overpressure protection device for the hydraulic cylinder has the benefits of protecting the safety of the hydraulic cylinder and equipment, and preventing equipment damage caused by overpressure.
Description
Technical field
The utility model relates to a kind of oil hydraulic cylinder technology, and this technology mainly is used on the metallurgical machinery oil hydraulic cylinder, and protection hydraulic cylinder works cavity pressure is no more than setting value, guarantees that device security uses.
Background technique
At present, on metallurgical equipment such as two roller or four-roller crusher, there are one group or two groups of oil hydraulic cylinders to act on the broken wheel, certain radial effect power are provided for broken wheel, guarantee particle size after cracking within the specific limits.To run into the thing hardness that is broken higher but when broken wheel, when granularity is bigger, the active force increase suddenly that broken wheel acts on the oil hydraulic cylinder makes oil hydraulic cylinder rodless cavity pressure pcl increase, at this moment need a device that rodless cavity pressure is discharged, piston rod is withdrawn, guarantee that rodless cavity pressure is within the setting value. after this hard thing had been crossed, broken wheel returned to the origin-location again at once, and guaranteed that pressure is in former range of set value.Otherwise, will cause the relevant parts damages of oil hydraulic cylinder with equipment.In current device, on hydraulic station, be provided with the certain protection device, but because hydraulic station is far away from oil hydraulic cylinder, often when rodless cavity pressure increased suddenly, these protective gears did not also respond the oil hydraulic cylinder of coming and have just damaged.
The model utility content
The purpose of this utility model is to provide a kind of oil hydraulic cylinder overpressure protector that is used to protect the safety of oil hydraulic cylinder and equipment.
The purpose of this utility model is achieved through the following channels: a kind of oil hydraulic cylinder overpressure protector; the plug-in mounting spool is contained in the valve body; again valve gap is contained in the valve body top; relief valve is contained in the place ahead of valve body; Pilot operated check valve is contained in a side of valve body, and pressure relay and accumulator are connected on the valve body with joint.
The beneficial effect of the utility model oil hydraulic cylinder overpressure protector is: the safety of protection oil hydraulic cylinder and equipment prevents that superpressure from causing the damage of equipment.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is the utility model structural representation;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is the utility model structure schematic top plan view.
Embodiment
As shown in Figure 1 and Figure 2; the utility model oil hydraulic cylinder overpressure protector is that plug-in mounting spool 6 is contained in the valve body 1; again valve gap 5 is contained in valve body 1 top; relief valve 2 is contained in the place ahead of valve body 1; Pilot operated check valve 3 is contained in a side of valve body 1, and pressure relay 4 and accumulator 7 usefulness joints are connected on the valve body 1.
During proper functioning, working pressure is P1 to P2 in the oil hydraulic cylinder rodless cavity, the thrust of oil hydraulic cylinder output certain limit, when the external force on acting on piston rod increased suddenly, plug-in mounting spool 6 was closed at once, relief valve 2 beginning overflows simultaneously, the piston rod withdrawal, at this moment external force will reduce, and the pressure in the rodless cavity can not increase, the oil that overflows in the rodless cavity enters accumulator 7, and accumulator 7 internal pressures increase.After the external force of unexpected increase disappears, because the accumulator internal pressure is higher than oil hydraulic cylinder rodless cavity internal pressure.Hydraulic oil in the accumulator 7 is opened plug-in mounting spool 6, enters the oil hydraulic cylinder rodless cavity, promotes piston rod and stretches out, and keeps the rodless cavity internal pressure at P1 to P2.Owing to reasons such as leakages, when the rodless cavity internal pressure is lower than P1, pressure relay 4 will be sent out signal; by hydraulic station hydraulic oil in the oil hydraulic cylinder overpressure protector replenishes the oil hydraulic cylinder rodless cavity; when pressure rose to P2, pressure relay 4 was sent out signal again, the hydraulic station fuel cut-off.
Claims (1)
1. oil hydraulic cylinder overpressure protector; it is characterized in that: plug-in mounting spool (6) is contained in the valve body (1); again valve gap (5) is contained in valve body (1) top; relief valve (2) is contained in the place ahead of valve body (1); Pilot operated check valve (3) is contained in a side of valve body (1), and pressure relay (4) and accumulator (7) are connected on the valve body (1) with joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920064071U CN201377483Y (en) | 2009-04-15 | 2009-04-15 | Overpressure protection device for hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920064071U CN201377483Y (en) | 2009-04-15 | 2009-04-15 | Overpressure protection device for hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201377483Y true CN201377483Y (en) | 2010-01-06 |
Family
ID=41517591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920064071U Expired - Fee Related CN201377483Y (en) | 2009-04-15 | 2009-04-15 | Overpressure protection device for hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201377483Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434541A (en) * | 2011-10-11 | 2012-05-02 | 飞翼股份有限公司 | Confluence block used for filling industrial pump hydraulic pressure return line |
| CN102773388A (en) * | 2012-07-12 | 2012-11-14 | 王佐栋 | Pressure-maintaining hydraulic controlled overflow valve |
-
2009
- 2009-04-15 CN CN200920064071U patent/CN201377483Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434541A (en) * | 2011-10-11 | 2012-05-02 | 飞翼股份有限公司 | Confluence block used for filling industrial pump hydraulic pressure return line |
| CN102434541B (en) * | 2011-10-11 | 2014-04-30 | 飞翼股份有限公司 | Confluence block used for filling industrial pump hydraulic pressure return line |
| CN102773388A (en) * | 2012-07-12 | 2012-11-14 | 王佐栋 | Pressure-maintaining hydraulic controlled overflow valve |
| CN102773388B (en) * | 2012-07-12 | 2016-03-23 | 西安天宇重工有限公司 | A kind of pressurize pilot relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20160415 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |