CN211370870U - Hydraulic system capable of reducing internal leakage amount - Google Patents
Hydraulic system capable of reducing internal leakage amount Download PDFInfo
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- CN211370870U CN211370870U CN201922430494.8U CN201922430494U CN211370870U CN 211370870 U CN211370870 U CN 211370870U CN 201922430494 U CN201922430494 U CN 201922430494U CN 211370870 U CN211370870 U CN 211370870U
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Abstract
The utility model provides a reduce hydraulic system of internal leakage volume, its characterized in that: a main pressure pipeline P1 of the hydraulic system is respectively connected with an oil port P of the pressure reducing valve and an oil port P of the overflow valve through a one-way valve; an oil port T of the pressure reducing valve is connected with an oil port P of a first electromagnetic valve through a one-way valve, and the oil port T of the first electromagnetic valve is connected with an oil port P of a second electromagnetic valve; a main oil return pipeline T1 of the hydraulic system is connected with an oil port T of the second electromagnetic valve and a pressure relief port of the pressure reducing valve; and the oil port T of the second electromagnetic valve is also connected with the oil port P of the overflow valve and an energy accumulator through an adjustable throttle valve. The utility model has the advantages that: this reduce hydraulic system of internal leakage volume is through setting up the solenoid valve at the relief pressure valve front end, and at system's pressurize stage, the solenoid valve must not be electrified, has reduced the biggest internal leakage volume of solenoid valve by a wide margin.
Description
Technical Field
The utility model relates to an experimental facilities of tunnel lining pipe piece ring especially relates to a reduce hydraulic system of internal leakage volume.
Background
Referring to fig. 1, a typical hydraulic system is shown. In the system, the pressure reducing valve 180 is in a three-way form, wherein a port 2 is an oil inlet, a port 1 is an oil outlet, and a port 3 is a pressure relief port. When the system pressure is greater than the set pressure of the pressure reducing valve, the port 3 of the pressure reducing valve is opened to release pressure, so that the pressure of the oil outlet at the port 1 is stabilized, and the set pressure is maintained. In the structure, the internal leakage amount of the pressure reducing valve is 30 cc/min at most, so that the system pressure is reduced, and energy is wasted; moreover, the motor-pump set is frequently started to maintain a certain pressure, which causes great challenges to the service life of the pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the structural shortcoming of prior art, provide a reduce hydraulic system of internal leakage volume, this reduce hydraulic system of internal leakage volume through with the solenoid valve setting at the relief pressure valve front end, at the pressurize stage of system, the solenoid valve must not be electrified, has reduced the biggest internal leakage volume of solenoid valve by a wide margin.
In order to achieve the above object, the embodiment of the present invention provides a hydraulic system for reducing internal leakage amount, which is realized by the following technical scheme:
a main pressure pipeline P1 of the hydraulic system is respectively connected with an oil port P of the pressure reducing valve and an oil port P of the overflow valve through a one-way valve; an oil port T of the pressure reducing valve is connected with an oil port P of a first electromagnetic valve through a one-way valve, and the oil port T of the first electromagnetic valve is connected with an oil port P of a second electromagnetic valve; a main oil return pipeline T1 of the hydraulic system is connected with an oil port T of the second electromagnetic valve and a pressure relief port of the pressure reducing valve; and the oil port T of the second electromagnetic valve is also connected with the oil port P of the overflow valve and an energy accumulator through an adjustable throttle valve.
And an oil port T of the first electromagnetic valve is also connected with a first pressure sensor and a first pressure measuring joint.
And an oil port T of the second electromagnetic valve is also connected with a second pressure sensor and a second pressure measuring joint through the adjustable throttle valve. Compared with the prior art, the beneficial effects of the utility model are that: this reduce hydraulic system of internal leakage volume is through setting up the solenoid valve at the relief pressure valve front end, and at system's pressurize stage, the solenoid valve must not be electrified, has reduced the biggest internal leakage volume of solenoid valve by a wide margin.
Drawings
The above features and advantages of the present invention will become more apparent and readily appreciated from the following description of the exemplary embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a hydraulic schematic diagram of a prior art hydraulic system;
fig. 2 is the hydraulic schematic diagram of the hydraulic system of the embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings so as to facilitate understanding by those skilled in the art:
referring to fig. 2, the present invention provides a hydraulic system for reducing internal leakage, wherein a main pressure line P1 is connected to an oil port P of a pressure reducing valve 180 and an oil port P of an overflow valve 130 through a check valve 120.2; the oil port T of the pressure reducing valve 180 is connected with the oil port P of the first solenoid valve 230 through a check valve 120.3, and the oil port T of the first solenoid valve 230 is connected with the oil port P of the second solenoid valve 200; a main oil return line T1 of the hydraulic system is connected to the oil port T of the second solenoid valve 200 and the pressure relief port of the pressure relief valve 180.
The port T of the first solenoid valve 230 is also connected to a first pressure sensor 160.1 and a first pressure tap 170.1.
The oil port T of the second solenoid valve 200 is further connected to the oil port P of the overflow valve 130, the accumulator 90.2, the second pressure sensor 160.2 and the second pressure tap 170.2 through an adjustable throttle 260.
Compared with the prior art, the beneficial effects of the utility model are that: this reduce hydraulic system of internal leakage volume is through setting up the solenoid valve at the relief pressure valve front end, and at system's pressurize stage, the solenoid valve must not be electrified, has reduced the biggest internal leakage volume of solenoid valve by a wide margin. The maximum internal leakage amount of the electromagnetic valve is only 0.6 cc/min by the modification.
Under the system pressure maintaining state (the solenoid valve 230 is not powered), the internal leakage amount of the system in the prior art scheme is as follows:
relief valve (130) + pressure reducing valve (180) 1 cc/min +30 cc/min 31 cc/min
The internal leakage of the system in this embodiment is:
the relief valve (130) and the electromagnetic valve (230) are 1 cc/min +0.6 cc/min and 1.6 cc/min.
The above embodiments are intended to illustrate the present invention and the embodiments in detail, but it can be understood by those skilled in the art that the above embodiments of the present invention are only one of the preferred embodiments of the present invention, and for space limitation, all embodiments can not be listed here one by one, and any implementation that can embody the technical solution of the present invention is within the protection scope of the present invention.
Claims (3)
1. A hydraulic system for reducing internal leakage is characterized in that: a main pressure pipeline P1 of the hydraulic system is respectively connected with an oil port P of the pressure reducing valve and an oil port P of the overflow valve through a one-way valve; an oil port T of the pressure reducing valve is connected with an oil port P of a first electromagnetic valve through a one-way valve, and the oil port T of the first electromagnetic valve is connected with an oil port P of a second electromagnetic valve; a main oil return pipeline T1 of the hydraulic system is connected with an oil port T of the second electromagnetic valve and a pressure relief port of the pressure reducing valve; and the oil port T of the second electromagnetic valve is also connected with the oil port P of the overflow valve and an energy accumulator through an adjustable throttle valve.
2. The hydraulic system for reducing the amount of internal leakage of claim 1, wherein: and an oil port T of the first electromagnetic valve is also connected with a first pressure sensor and a first pressure measuring joint.
3. The hydraulic system for reducing the amount of internal leakage of claim 2, wherein: and an oil port T of the second electromagnetic valve is also connected with a second pressure sensor and a second pressure measuring joint through the adjustable throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922430494.8U CN211370870U (en) | 2019-12-30 | 2019-12-30 | Hydraulic system capable of reducing internal leakage amount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922430494.8U CN211370870U (en) | 2019-12-30 | 2019-12-30 | Hydraulic system capable of reducing internal leakage amount |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211370870U true CN211370870U (en) | 2020-08-28 |
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ID=72169769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922430494.8U Active CN211370870U (en) | 2019-12-30 | 2019-12-30 | Hydraulic system capable of reducing internal leakage amount |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211370870U (en) |
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2019
- 2019-12-30 CN CN201922430494.8U patent/CN211370870U/en active Active
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