CN202914426U - Safety protection device for hydraulic system - Google Patents
Safety protection device for hydraulic system Download PDFInfo
- Publication number
- CN202914426U CN202914426U CN 201220595752 CN201220595752U CN202914426U CN 202914426 U CN202914426 U CN 202914426U CN 201220595752 CN201220595752 CN 201220595752 CN 201220595752 U CN201220595752 U CN 201220595752U CN 202914426 U CN202914426 U CN 202914426U
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- pressure
- received
- valve block
- 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
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model provides a safety protection device for a hydraulic system and relates to the technical field of hydraulic protection. The safety protection device for the hydraulic system solves a technical problem of avoiding the invalidation of pressure control of the hydraulic system. The safety protection device for the hydraulic system comprises a pressure regulating valve, a reversing solenoid valve, a pressure selector valve and two cartridge valves. The reversing solenoid valve is used for controlling the on-off of a second cartridge valve. Two working oil openings of the second cartridge valve are respectively connected to a systematic oil inlet opening and a systematic oil return opening. Two oil working openings of a first cartridge valve are respectively connected to the systematic oil inlet opening and a systematic oil supply opening. A control oil opening of the first cartridge valve is connected to the systematic oil supply opening. Two oil inlet openings of the pressure selector valve are respectively connected to the systematic oil inlet opening and the systematic oil supply opening. The oil outlet opening of the pressure selector valve is connected to the oil control opening of the pressure regulating valve. The oil inlet opening of the pressure regulating valve is connected to the systematic oil inlet opening, and an overflow opening of the pressure regulating valve is connected with the systematic oil return opening. The safety protection device for the hydraulic system is suitable for the safety protection of the systematic pressure of the hydraulic system.
Description
Technical field
The utility model relates to the hydraulic protecting technology, particularly relates to a kind of technology of the safety protection device for hydraulic system.
Background technique
Existing hydraulic system all is to utilize the direct effect of pressure regulator valve to realize the system overload protection, and when system pressure surpassed the setting value of pressure regulator valve, pressure regulator valve was opened pressure release automatically, with the keeping system pressure stability.
The mode of this employing pressure regulator valve control system pressure has following defective: when 1) adopting single pressure regulator valve control, if dirtier this pressure regulator valve that causes of system's fluid is stuck, will be so that Regulation Control be malfunctioning, thus system's overvoltage caused, the equipment component in the damage system; When 2) the system overload amount was larger, pressure regulator valve can have little time pressure release, thereby caused system's overvoltage, the equipment component in the damage system.This shows that the system pressure control mode of existing hydraulic system lost efficacy because of control easily and affects system's security of operation.
The model utility content
For the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provides a kind of system pressure of avoiding and controls inefficacy, guarantees the safety protection device that is used for hydraulic system of hydraulic system security of operation.
In order to solve the problems of the technologies described above, a kind of safety protection device for hydraulic system provided by the utility model, it is characterized in that: comprise valve block, and be installed in respectively a pressure regulator valve, a reversing solenoid valve, a pressure selection valve, two cartridge valves in the valve block;
Described two cartridge valves are respectively the first cartridge valve, the second cartridge valve;
Described valve block is provided with system's filler opening, system's oil-feed port, a system oil return mouth;
Described reversing solenoid valve is provided with a Gong Kou, a pressure hydraulic fluid port, a return opening, public mouthful of control port of receiving the second cartridge valve of reversing solenoid valve, the pressure hydraulic fluid port of reversing solenoid valve is received the system's filler opening on the valve block, and the return opening of reversing solenoid valve is received the system oil return mouth on the valve block;
An actuator port of described the second cartridge valve is received the system's filler opening on the valve block, and another actuator port is received the system oil return mouth on the valve block;
An actuator port of described the first cartridge valve is received the system's filler opening on the valve block, and another actuator port is received the system's oil-feed port on the valve block, and the control port first quarter stream valve of the first cartridge valve is received the system's oil-feed port on the valve block;
Described pressure selection valve is provided with an oil outlet, two filler openings, two filler openings of pressure selection valve are respectively the first filler opening, the second filler opening, the first filler opening of pressure selection valve is received the system's filler opening on the valve block, the second filler opening of pressure selection valve is received the system's oil-feed port on the valve block, and the oil outlet of pressure selection valve is received the control port of pressure regulator valve;
The filler opening of described pressure regulator valve is received the system's filler opening on the valve block, and the flow-off of pressure regulator valve is received the system oil return mouth on the valve block.
Further, described valve block is provided with an oil-feed pressure tap, a fuel feeding pressure tap, and described oil-feed pressure tap is received system's filler opening on the valve block through an one-way valve, and described fuel feeding pressure tap is received system's oil-feed port on the valve block through an one-way valve.
The safety protection device that is used for hydraulic system that the utility model provides; utilize pressure regulator valve and pressure selection valve regulator control system oil pressure; automatically the high side of selection pressure is regulated and control; utilize cooperating of reversing solenoid valve and the second cartridge valve; can guarantee quick pressure releasing; therefore can effectively avoid system pressure control to lose efficacy, can guarantee the hydraulic system security of operation.
Description of drawings
Fig. 1 is the hydraulic diagram of the utility model embodiment's the safety protection device that is used for hydraulic system.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.
As shown in Figure 1, a kind of safety protection device for hydraulic system that the utility model embodiment provides, it is characterized in that: comprise valve block, and be installed in respectively a pressure regulator valve H4, a reversing solenoid valve H3, a pressure selection valve S1, two cartridge valves in the valve block;
Described two cartridge valves are respectively the first cartridge valve H1, the second cartridge valve H2;
Described valve block is provided with system's oil inlet P 2, an oil-feed port P1 of system, a system oil return mouth T;
Described reversing solenoid valve H3 is provided with a Gong Kou, a pressure hydraulic fluid port, a return opening, the public mouthful of control port of receiving the second cartridge valve H2 of reversing solenoid valve H3, the pressure hydraulic fluid port of reversing solenoid valve H3 is received the system's oil inlet P 2 on the valve block, and the return opening of reversing solenoid valve H3 is received the system oil return mouth T on the valve block;
The actuator port of described the second cartridge valve H2 is received the system's oil inlet P 2 on the valve block, and another actuator port is received the system oil return mouth T on the valve block;
The actuator port of described the first cartridge valve H1 is received the system's oil inlet P 2 on the valve block, another actuator port is received the oil-feed port P1 of system on the valve block, and the control port first quarter stream valve H5 of the first cartridge valve H1 receives the oil-feed port P1 of system on the valve block;
Described pressure selection valve S1 is provided with an oil outlet, two filler openings, two filler openings of pressure selection valve S1 are respectively the first filler opening, the second filler opening, the first filler opening of pressure selection valve S1 is received the system's oil inlet P 2 on the valve block, the second filler opening of pressure selection valve S1 is received the oil-feed port P1 of system on the valve block, and the oil outlet of pressure selection valve S1 is received the control port of pressure regulator valve H4;
The filler opening of described pressure regulator valve H4 is received the system's oil inlet P 2 on the valve block, and the flow-off of pressure regulator valve H4 is received the system oil return mouth T on the valve block.
Among the utility model embodiment, described valve block is provided with an oil-feed pressure tap M1, a fuel feeding pressure tap M2, described oil-feed pressure tap M1 receives system's oil inlet P 2 on the valve block through an one-way valve, and described fuel feeding pressure tap M2 receives the oil-feed port P1 of system on the valve block through an one-way valve.
Among the utility model embodiment, described pressure regulator valve H4 is a relief valve.
The utility model embodiment is suitable for the system pressure safety protection of hydraulic system; be specially adapted to hydroelectric hydraulic system; be serially connected in during use on the pressure oil oil feed line of hydraulic system; system's oil inlet P 2 cut-in pressures oil on the valve block, the system's oil-feed port P1 pressure oil output on the valve block is to load.
The utility model embodiment's working principle is as follows:
Under the standard load state, reversing solenoid valve H3 gets electric, this moment, the public mouth of reversing solenoid valve H3 was communicated with the pressure hydraulic fluid port, the pressure oil of system's oil inlet P 2 accesses on the valve block is loaded into the control port of the second cartridge valve H2 by reversing solenoid valve H3, so that the controlled cut-off of the second cartridge valve H2, the oil-feed port P1 of system that the pressure oil of system oil inlet P 2 accesses of this moment on the valve block is flowed through behind the first cartridge valve H1 from valve block exports follow-up load to, realize that band carries work, this moment is under the effect of throttle valve H5, the control port pressure of the first cartridge valve H1 is very low, so that the first cartridge valve H1 remains on state;
When the pressure of system's oil inlet P 2 is above greater than the pressure 0.5MPa of the oil-feed port P1 of system, the oil outlet of pressure selection valve S1 is communicated with its first filler opening, the oil pressure of selection control system oil inlet P 2, this moment pressure regulator valve H4 automatic regulating system oil inlet P 2 oil pressure, automatic overflow when the oil pressure of system's oil inlet P 2 is too high makes the oil-feed oil pressure of system's oil inlet P 2 keep stable;
When the pressure of system's oil inlet P 2 is above less than the pressure 0.5MPa of the oil-feed port P1 of system, the oil outlet of pressure selection valve S1 is communicated with its second filler opening, the oil pressure of selection control system oil-feed port P1, this moment pressure regulator valve H4 automatic regulating system oil-feed port P1 oil pressure, automatic overflow when the oil pressure of the oil-feed port P1 of system is too high, make the fuel feeding oil pressure of the oil-feed port P1 of system keep stable, and can avoid building the pressure because of the stuck system that causes of the first cartridge valve H1;
System's oil inlet P 2 input pressures on valve block are too high, when needing quick pressure releasing, reversing solenoid valve H3 dead electricity, this moment, the public mouth of reversing solenoid valve H3 was communicated with return opening, the control port decompression of the second cartridge valve H2, so that the controlled conducting of the second cartridge valve H2, the input pressure of the system's oil inlet P 2 on this moment valve block is realized quick pressure releasing by the system oil return mouth T pressure release of the second cartridge valve H2 on the valve block.
Claims (2)
1. a safety protection device that is used for hydraulic system is characterized in that: comprise valve block, and be installed in respectively a pressure regulator valve, a reversing solenoid valve, a pressure selection valve, two cartridge valves in the valve block;
Described two cartridge valves are respectively the first cartridge valve, the second cartridge valve;
Described valve block is provided with system's filler opening, system's oil-feed port, a system oil return mouth;
Described reversing solenoid valve is provided with a Gong Kou, a pressure hydraulic fluid port, a return opening, public mouthful of control port of receiving the second cartridge valve of reversing solenoid valve, the pressure hydraulic fluid port of reversing solenoid valve is received the system's filler opening on the valve block, and the return opening of reversing solenoid valve is received the system oil return mouth on the valve block;
An actuator port of described the second cartridge valve is received the system's filler opening on the valve block, and another actuator port is received the system oil return mouth on the valve block;
An actuator port of described the first cartridge valve is received the system's filler opening on the valve block, and another actuator port is received the system's oil-feed port on the valve block, and the control port first quarter stream valve of the first cartridge valve is received the system's oil-feed port on the valve block;
Described pressure selection valve is provided with an oil outlet, two filler openings, two filler openings of pressure selection valve are respectively the first filler opening, the second filler opening, the first filler opening of pressure selection valve is received the system's filler opening on the valve block, the second filler opening of pressure selection valve is received the system's oil-feed port on the valve block, and the oil outlet of pressure selection valve is received the control port of pressure regulator valve;
The filler opening of described pressure regulator valve is received the system's filler opening on the valve block, and the flow-off of pressure regulator valve is received the system oil return mouth on the valve block.
2. the safety protection device for hydraulic system according to claim 1; it is characterized in that: described valve block is provided with an oil-feed pressure tap, a fuel feeding pressure tap; described oil-feed pressure tap is received system's filler opening on the valve block through an one-way valve, and described fuel feeding pressure tap is received system's oil-feed port on the valve block through an one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595752 CN202914426U (en) | 2012-11-13 | 2012-11-13 | Safety protection device for hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220595752 CN202914426U (en) | 2012-11-13 | 2012-11-13 | Safety protection device for hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914426U true CN202914426U (en) | 2013-05-01 |
Family
ID=48162745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220595752 Expired - Fee Related CN202914426U (en) | 2012-11-13 | 2012-11-13 | Safety protection device for hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202914426U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586527A (en) * | 2013-11-26 | 2014-02-19 | 山东泰丰液压股份有限公司 | Valve type plate shearer hydraulic control system with safety protection device |
| CN104154056A (en) * | 2014-07-30 | 2014-11-19 | 宁波恒力液压股份有限公司 | High-flow hydraulic reversing loop with interlocking function |
-
2012
- 2012-11-13 CN CN 201220595752 patent/CN202914426U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586527A (en) * | 2013-11-26 | 2014-02-19 | 山东泰丰液压股份有限公司 | Valve type plate shearer hydraulic control system with safety protection device |
| CN103586527B (en) * | 2013-11-26 | 2015-10-14 | 山东泰丰液压股份有限公司 | With safety guard lock formula plate shearing machine hydraulic control system |
| CN104154056A (en) * | 2014-07-30 | 2014-11-19 | 宁波恒力液压股份有限公司 | High-flow hydraulic reversing loop with interlocking function |
| CN104154056B (en) * | 2014-07-30 | 2016-05-04 | 宁波恒力液压股份有限公司 | A kind of high-volume hydraulic commutation loop with interlock function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103115028A (en) | Electro-hydraulic servo actuator | |
| CN201896802U (en) | Unidirectional differential speed-regulation hydraulic control device | |
| CN203285493U (en) | Steam turbine multi-steam source automatic switching control system | |
| CN102373689B (en) | High-pressure waterway control system | |
| CN207650662U (en) | A kind of intelligent pressure control system | |
| CN202914426U (en) | Safety protection device for hydraulic system | |
| CN201080820Y (en) | Skid-mounted oilfield intelligent flow stabilizing water-dispensing valve set | |
| CN102966619A (en) | Safety protection device for hydraulic system | |
| CN103362899A (en) | Pilot, heat dissipation and integration hydraulic system and loading machine | |
| CN202598130U (en) | Self-gas-supplying system controlled by pressure adjusting device of compressed natural gas | |
| CN104806406A (en) | Normally closed electro-mechanical hybrid high-pressure oil pump | |
| CN204175686U (en) | A kind of bender hydraulic system | |
| CN203188272U (en) | Excavator oil return pressure control loop | |
| CN201322016Y (en) | Oil pipe explosion-proof device | |
| CN202790680U (en) | Electronic controlled proportional multi-way valve | |
| CN104005451A (en) | Pre-opening pressure relief device | |
| CN201679597U (en) | Diesel engine oil supply system | |
| CN204739029U (en) | Combination formula backpressure device of little pressure oscillation of complete flow | |
| CN103727078A (en) | Crane and hydraulic system thereof | |
| CN204591848U (en) | A kind of high low pressure pressure regulator valve group | |
| CN204629093U (en) | A kind of steam Small Flow Control System | |
| CN203065074U (en) | Winding motor hydraulic system and rotary drilling rig | |
| CN101979868A (en) | Spindle brake device for wind power generation hydraulic system | |
| CN201844081U (en) | Pipeline overflow valve | |
| CN202418067U (en) | High-speed hydraulic motor braking device |
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: 20130501 Termination date: 20161113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |