CN201396330Y - Safety valve set for pump use - Google Patents
Safety valve set for pump use Download PDFInfo
- Publication number
- CN201396330Y CN201396330Y CN200920072647XU CN200920072647U CN201396330Y CN 201396330 Y CN201396330 Y CN 201396330Y CN 200920072647X U CN200920072647X U CN 200920072647XU CN 200920072647 U CN200920072647 U CN 200920072647U CN 201396330 Y CN201396330 Y CN 201396330Y
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- Prior art keywords
- valve
- pressure
- oil
- valve body
- relief valve
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Abstract
A safety valve set for pump use comprises a valve body, a cartridge relief valve, a modular relief valve and an electromagnetic directional valve. An oil inlet P, an oil outlet P1, an oil return portT, and a control port X, which are communicated with a main oil path are arranged in the valve body; both the cartridge relief valve and the modular relief valve are mounted on the valve body and arecommunicated with the oil inlet P, the oil outlet P1, the oil return port T and the control port X; and the electromagnetic directional valve is fixedly arranged on the modular relief valve. The utility model has the beneficial effects that connecting pipelines are reduced, and the leakage is reduced; and the path is short, and the bypass pressure is low, so that the start pressure of the pump andthe bypass pressure thereof are near zero. The safety valve set for pump use has small compress capacity and can be stably switched to a low-pressure bypass, thereby stabilizing the system pressure,improving the performance, and reducing the noise; and at the same time the valve set is directly mounted at the SAE pressure oil port of the pump, thereby reducing space occupation and facilitating installation, detachment and maintenance.
Description
Technical field
The utility model relates to a kind of hydraulic element, relates in particular to a kind of pump that is used for removal system pressure safety valve group.
Background technique
Usually, heavy construction equipment, drive actuator by the method that hydraulic fluid is discharged and carry out work from oil hydraulic pump, the hydraulic fluid of discharging from oil hydraulic pump offers different actuators by the control valve that a controlling liquid flows to, safety valve is installed in the control valve, so that when the pressure in hydraulic circuit surpasses the working pressure of setting, working liquid body is discharged in the pressure oil tank, keep system stability.
Connecting tube between existing safety valve and pump and the system is more, makes that its dismounting and maintenance are all very inconvenient, and causes leakage easily.In addition, existing safety valve bypass pressure height makes system pressure unsettled.
The model utility content
In order to address the above problem, the utility model provides a kind of compact structure, can be directly installed on the pressure hydraulic fluid port of oil hydraulic pump, reduce leakage, dismounting and pump safety valve group easy to maintenance and that bypass pressure is low.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of pump safety valve group is characterized in that: comprise valve body, plug-in type relief valve, overlapping relief valve and solenoid directional control valve; The oil inlet P, oil outlet P1, oil return inlet T and the control mouth X that are communicated with working connection are arranged in the described valve body; Described plug-in type relief valve is inserted on the valve body, and is connected with oil inlet P, oil outlet P1, oil return inlet T and the control mouthful X of valve body; Described overlapping relief valve is installed on the valve body, and is connected with oil inlet P, oil outlet P1, oil return inlet T and the control mouthful X of valve body, is fixed with solenoid directional control valve on the overlapping relief valve.
Further, in the utility model, on the described valve body pressure relay is installed.
Further, in the utility model, have pressure tap on the described valve body.
Further, in the utility model, be provided with damping in the control runner of described valve body.
The beneficial effects of the utility model are:
The utility model can be directly installed on the pressure hydraulic fluid port of pump, makes pressure can set up (many grades of pressure ratings can satisfy different pressure regulation demands) rapidly, and can reduce connecting tube and reduce leakage; Because the path is short, so bypass pressure is low, the startup of pump and bypass pressure are near zero.This pump is little with safety valve group compression volume, can steadily switch to the low pressure bypass, so stablized the pressure of system, has improved performance, has reduced noise.Owing to be directly installed on the SAE pressure hydraulic fluid port of pump, can reduce the space simultaneously, make easy for assembly and disassembly and maintenance.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is that a kind of pump among the utility model embodiment 1 is with the structural representation of safety valve group;
Fig. 2 is the structural representation of plug-in type relief valve of the present utility model;
Fig. 3 is the utility model embodiment 1 a schematic diagram;
Fig. 4 is that a kind of pump among the utility model embodiment 2 is with the structural representation of safety valve group;
Fig. 5 is the utility model embodiment 2 a schematic diagram.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Embodiment 1:
Referring to Fig. 1,2 and 3, a kind of pump safety valve group comprises a valve body 3, solenoid directional control valve 1, overlapping relief valve 2 and plug-in type relief valve 4.
Process the oil inlet P, oil outlet P1, oil return inlet T and the control mouth X that are communicated with working connection on the valve body 3.The upper surface of valve body 3 also has the through hole of the control oil channel that is used to be communicated with valve body working connection and overlapping relief valve 2.Valve body left side machining one mounting hole is used to install a plug-in type relief valve 4.
Overlapping relief valve 2 is installed in the upper surface of valve body 3 by bolt, and the overlapping relief valve is connected with oil inlet P, oil outlet P1, oil return inlet T and the control mouthful X of valve body.Solenoid directional control valve 1 is packed on the overlapping relief valve 2 by bolt.
Adopt this solenoid directional control valve, overlapping relief valve to be directly installed on structure together, the pipeline when having saved original the connection having time-delay and realizing No Load Start, and Safety performance is good, and its compact structure, and is easy for installation.
Plug-in type relief valve 4 is installed on the valve body 3 by mounting hole, and is connected with oil inlet P, oil outlet P1, oil return inlet T and the control mouthful X of valve body.Referring to Fig. 2, the cylindrical place of plug-in type relief valve 4 makes circular groove, is used to place seal ring, prevents hydraulic fluid leak.There is pilot valve 49 inside of plug-in type relief valve 4, the pressure adjusting spring 47 of pilot valve 49 withstands on the rear end of guide's spool 46, the front end of guide's spool 46 withstands on the first segment head piece 44 of link 45, on this link 45 shoulder is arranged, spring 43 in the main valve plug 42 withstands on the shoulder of this link, has second throttle orifice 41 on the main valve plug 42.
The working principle of plug-in type relief valve:
In that (in the oil circuit of P～P1), the pressure of fluid acts on the end face of main valve plug 42 of plug-in type relief valve, gives pilot valve 49 by second throttle orifice 41 and first segment head piece 44 with propagation of pressure simultaneously.When the pressure in the pipeline during greater than the spring force of the pressure adjusting spring 47 of pilot valve, guide's spool 46 moves right, and pilot valve 49 is opened.Part fluid enters spring chamber 48, introduces oil return inlet T by the valve inner runner again, and fluid is owing to produced pressure drop, and main valve plug 42 is opened under the effect of pressure reduction, and hydraulic oil flows to the T mouth from the P mouth; When pressure was reduced to certain value, main valve plug was moved to the left under the effect of spring, and main valve plug is closed, and kept constant working pressure with this.
The oil inlet P of valve body 3 is directly installed on the pressure hydraulic fluid port of variable displacement pump, oil outlet P1 welding system; The control mouth of variable displacement pump communicates the oil return inlet T connected tank with the control mouth X of valve body 3.
Under the acting in conjunction of overlapping relief valve 2 and solenoid directional control valve 1, the hydraulic fluid pressure of control mouthful X can change.But the pressure that overlapping relief valve 2 is set just works in the time of must being lower than the setting value of plug-in type relief valve 4.
Start variable displacement pump, solenoid directional control valve valve " b " gets electric, and P leads to A, at this moment, sets up the pressure of system by the plug-in type relief valve earlier, sets up the pressure of overlapping relief valve A mouth then.Must be electric when solenoid directional control valve valve " a ", can directly set up the pressure of overlapping relief valve B mouth.So just finished the pressure setting of safety valve group plug-in type relief valve 4 and overlapping relief valve 2.
This pump is simple in structure, easy to process with the safety valve group, leakage is few, and cost is low.
The utility model can be directly installed on the pressure hydraulic fluid port of pump, makes pressure can set up (many grades of pressure ratings can satisfy different pressure regulation demands) rapidly, and can reduce connecting tube and reduce leakage; Because the path is short, so bypass pressure is low, the startup of pump and bypass pressure are near zero.This pump is little with safety valve group compression volume, can steadily switch to the low pressure bypass, so stablized the pressure of system, has improved performance, has reduced noise.Owing to be directly installed on the SAE pressure hydraulic fluid port of pump, can reduce the space simultaneously, make easy for assembly and disassembly and maintenance.
Embodiment 2:
The safety valve group of pump as shown in Figure 4 comprises a valve body 3, solenoid directional control valve 1, overlapping relief valve 2 and plug-in type relief valve 4.
Process the oil inlet P, oil outlet P1, oil return inlet T, control mouth X, restriction 6, the pressure tap M that are communicated with working connection on the valve body 3.Be provided with damping 7 in the control runner of valve body 3.The upper surface of valve body 3 also has the through hole of the control oil channel that is used to be communicated with valve body working connection and overlapping relief valve 2.Valve body left side machining one mounting hole is used to install a plug-in type relief valve 4.
Overlapping relief valve 2 is installed in the upper surface of valve body 3 by bolt, and solenoid directional control valve 1 is packed on the overlapping relief valve 2 by bolt.The left side of valve body 3 connects a pressure relay 5 by bolt, can switch on or off circuit by oil circuit by working pressure relay 5, further protective system safety.As not needing pressure relay, available vexed plug is blocked this place.
By working pressure relay 5, can switch on or off circuit by oil circuit.As not needing pressure relay, pilot line is blocked with stifle.
Pump shown in Figure 4 is the same with safety valve group basic principle with pump among the embodiment 1 with the safety valve group, and the difference between them is that embodiment 2 pump has increased some auxiliary holes with safety valve, makes its versatility stronger.In addition, this pump with the safety valve group in, lay down damping 7, can realize a control mouthful X external control, the stifled control mouthful X that goes up realizes internal control, so this pump can realize that with the safety valve group external control effluxes, internal control effluxes, control device is more flexible, general.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in the foregoing description and the specification is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (4)
1, a kind of pump safety valve group is characterized in that: comprise valve body, plug-in type relief valve, overlapping relief valve and solenoid directional control valve; The oil inlet P, oil outlet P1, oil return inlet T and the control mouth X that are communicated with working connection are arranged in the described valve body; Described plug-in type relief valve is inserted on the valve body, and is connected with oil inlet P, oil outlet P1, oil return inlet T and the control mouthful X of valve body; Described overlapping relief valve is installed on the valve body, and is connected with oil inlet P, oil outlet P1, oil return inlet T and the control mouthful X of valve body, is fixed with solenoid directional control valve on the overlapping relief valve.
2, a kind of pump safety valve group according to claim 1 is characterized in that, on the described valve body pressure relay is installed.
3, a kind of pump safety valve group according to claim 1 is characterized in that, has pressure tap on the described valve body.
4, a kind of pump safety valve group according to claim 1 is characterized in that, is provided with damping in the control runner of described valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920072647XU CN201396330Y (en) | 2009-05-21 | 2009-05-21 | Safety valve set for pump use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920072647XU CN201396330Y (en) | 2009-05-21 | 2009-05-21 | Safety valve set for pump use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201396330Y true CN201396330Y (en) | 2010-02-03 |
Family
ID=41618839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920072647XU Expired - Fee Related CN201396330Y (en) | 2009-05-21 | 2009-05-21 | Safety valve set for pump use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201396330Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111094761A (en) * | 2018-01-31 | 2020-05-01 | Ｋｙｂ株式会社 | Valve device |
-
2009
- 2009-05-21 CN CN200920072647XU patent/CN201396330Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111094761A (en) * | 2018-01-31 | 2020-05-01 | Ｋｙｂ株式会社 | Valve device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20160521 |