CN214424796U - Hydraulic system of oil pressure device - Google Patents
Hydraulic system of oil pressure device Download PDFInfo
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- CN214424796U CN214424796U CN202120265945.1U CN202120265945U CN214424796U CN 214424796 U CN214424796 U CN 214424796U CN 202120265945 U CN202120265945 U CN 202120265945U CN 214424796 U CN214424796 U CN 214424796U
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Abstract
The utility model provides an oil pressure unit hydraulic system relates to speed regulator technical field, including the screw pump that connects gradually, automatic gulp valve and relief valve assembly, pans and overhead tank, be equipped with the filter screen on the screw pump, automatic gulp valve and relief valve assembly include safe overflow valve and liquid accuse gulp valve, are equipped with the check valve between pans and the overhead tank, are equipped with electric contact pressure gauge, bleeder valve and bleed valve on the overhead tank. Air in the pressure tank is gradually increased, and redundant oil in the pressure tank can be gradually discharged out of the tank body and flows into the oil return tank. If the oil level of the oil return tank is higher than the air inlet pipe and the oil return pipe of the middle air supply tank, oil in the middle air supply tank cannot flow out automatically under the action of atmospheric pressure, and air is not supplemented again when the oil pump supplies oil again.
Description
Technical Field
The utility model relates to a speed regulator technique especially relates to an oil pressure unit hydraulic system.
Background
The water turbine speed regulator is used as important equipment of a hydraulic power plant, plays a key role in normal operation of the hydraulic power plant, is inseparable from the work of whether the hydraulic power plant can normally generate electricity, and is directly related to safe and stable operation of a water turbine unit and even an electric power system once the speed regulator fails.
At present, the PLC is widely applied to the water turbine speed regulator, however, most speed regulator manufacturers adopt the conventional PLC, the conventional PLC adopts a ladder diagram, an instruction list and a corresponding flow chart, and the conventional PLC, the instruction list and the corresponding flow chart are oriented to hardware simulation and adopt a program scanning operation mode. The method occupies much time of the CPU and has low operation efficiency. In addition, the speed governor of the water turbine has particularity, and a conventional PLC is adopted, so that a plurality of circuits are added by a speed governor manufacturer, and the reliability of the whole speed governor is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide an oil pressure unit hydraulic system.
The utility model discloses a realize through following technical scheme: the utility model provides an oil pressure unit hydraulic system, its characterized in that, includes the screw pump that connects gradually, automatic gulp valve and relief valve assembly, pans and overhead tank, be equipped with the filter screen on the screw pump, automatic gulp valve and relief valve assembly include safe overflow valve and liquid accuse gulp valve, be equipped with the check valve between pans and the overhead tank, be equipped with electric contact manometer, fuel outlet valve and bleed valve on the overhead tank.
According to the above technical solution, preferably, the screw pump is driven by a motor.
According to the technical scheme, preferably, the pressure tank is further provided with a liquid level meter.
According to the technical scheme, preferably, the electric contact pressure gauge is provided with two pressure gauge switches.
The utility model has the advantages that: along with the increase of the starting times of the oil pump motor, according to the principle, the air in the pressure tank is gradually increased, and the redundant oil in the pressure tank can be gradually discharged out of the tank body and flows into the oil return tank. If the oil level of the oil return tank is higher than the air inlet pipe and the oil return pipe of the middle air supply tank, oil in the middle air supply tank cannot flow out automatically under the action of atmospheric pressure, and air is not supplemented again when the oil pump supplies oil again.
When the oil pump motor control system fails to stop the motor, the pressure in the pressure tank can continuously rise. When the pressure rises to exceed the pressure value set by the safety overflow valve, the overflow valve acts to connect the outlet of the oil pump with the oil return tank, and the system pressure is guaranteed not to rise any more to play a role in protection.
Drawings
Fig. 1 shows a block diagram of an embodiment of the invention.
In the figure: 1. a screw pump; 2. an automatic air supply valve and safety valve assembly; 3. an intermediate tank; 4. a pressure tank; 5. filtering with a screen; 6. a safety overflow valve; 7. a hydraulic control air compensating valve; 8. a one-way valve; 9. an electric contact pressure gauge; 10. an oil drain valve; 11. a deflation valve; 12. a motor; 13. a liquid level meter; 14 pressure gauge switch.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in the figure, the utility model provides an oil pressure unit hydraulic system, a serial communication port, including screw pump 1 that connects gradually, automatic gulp valve and relief valve assembly 2, intermediate tank 3 and overhead tank 4, be equipped with filter screen 5 on the screw pump 1, automatic gulp valve and relief valve assembly 2 includes safe overflow valve 6 and liquid accuse gulp valve 7, be equipped with check valve 8 between intermediate tank 3 and the overhead tank 4, be equipped with electric contact pressure gauge 9 on the overhead tank 4, bleeder valve 10 and bleed valve 11.
According to the above embodiment, preferably, the screw pump 1 is driven by the motor 12.
According to the above embodiment, the pressure tank 4 is preferably further provided with a liquid level meter 13.
According to the above embodiment, the electro-contact pressure gauge 9 is preferably provided with two and with the pressure gauge switch 14.
The utility model discloses a theory of operation does: the pressure tank is normally filled with 2/3 compressed air at the top and 1/3 turbine oil at the bottom. Two cavities at the lower end of the middle air supply tank are communicated with the oil return tank before the screw pump is started. If the oil level of the oil return tank is lower than the normal oil level in the running process, the oil level in the pressure tank is too high due to the fact that the total oil quantity of the oil pressure device is certain, and the oil-gas ratio is unbalanced. At this time, the air supply pipe of the hydraulic control air supply valve is exposed out of the oil surface, and the middle air supply tank is communicated with the atmosphere. At this time, the air supply tank is filled with air of one atmospheric pressure.
When the oil pressure value in the oil pressure device drops and exceeds the set value, the electric contact pressure gauge sends an electric signal to the oil pressure control device. The control device enables a corresponding oil pump motor to be electrified and started according to the received signal, the motor drives the screw pump to rotate, and oil in the oil return tank is filtered by the filter screen, sucked into the screw pump and enters the automatic air supply valve and safety valve assembly through the outlet of the screw pump.
The pilot-controlled gulp valve operates under the pilot action of the pressure oil and converts the function, namely the left function of the upper valve shown in the figure. Two oil ports going to the oil return tank below the hydraulic control air supply valve are closed, namely two cavities at the lower end of the middle air supply tank are disconnected with the oil return tank, and one oil port is communicated with an oil pump outlet. The air in the intermediate air supply tank is compressed under the action of the oil pump pressure oil and is pushed into the pressure tank by the pressure oil through the one-way valve.
When the oil pressure value in the oil pressure device rises and exceeds a set value, the electric contact pressure gauge sends an electric signal to the oil pressure control device. The control device stops the rotation of the corresponding oil pump motor according to the received signal. After the screw pump stops moving, the pilot control oil of the hydraulic control air supply valve loses pressure, and the hydraulic control air supply valve resets under the action of a spring of the hydraulic control air supply valve, namely the right position of the upper valve in the diagram is enabled. Two oil ports going to the oil return tank below the hydraulic control air supply valve are communicated with the middle air supply tank, namely two cavities at the lower end of the middle air supply tank are communicated with the oil return tank. Under the action of gravity, the oil in the middle air supply tank flows back to the oil return tank. The middle air supply tank is filled with air again, and the air is injected into the pressure tank again when the oil pump is started next time.
Along with the increase of the starting times of the oil pump motor, according to the principle, the air in the pressure tank is gradually increased, and the redundant oil in the pressure tank can be gradually discharged out of the tank body and flows into the oil return tank. If the oil level of the oil return tank is higher than the air inlet pipe and the oil return pipe of the middle air supply tank, oil in the middle air supply tank cannot flow out automatically under the action of atmospheric pressure, and air is not supplemented again when the oil pump supplies oil again.
When the oil pump motor control system fails to stop the motor, the pressure in the pressure tank can continuously rise. When the pressure rises to exceed the pressure value set by the safety overflow valve, the overflow valve acts to connect the outlet of the oil pump with the oil return tank, and the system pressure is guaranteed not to rise any more to play a role in protection.
The utility model has the advantages that: along with the increase of the starting times of the oil pump motor, according to the principle, the air in the pressure tank is gradually increased, and the redundant oil in the pressure tank can be gradually discharged out of the tank body and flows into the oil return tank. If the oil level of the oil return tank is higher than the air inlet pipe and the oil return pipe of the middle air supply tank, oil in the middle air supply tank cannot flow out automatically under the action of atmospheric pressure, and air is not supplemented again when the oil pump supplies oil again.
When the oil pump motor control system fails to stop the motor, the pressure in the pressure tank can continuously rise. When the pressure rises to exceed the pressure value set by the safety overflow valve, the overflow valve acts to connect the outlet of the oil pump with the oil return tank, and the system pressure is guaranteed not to rise any more to play a role in protection.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides an oil pressure unit hydraulic system, its characterized in that, includes the screw pump that connects gradually, automatic gulp valve and relief valve assembly, pans and overhead tank, be equipped with the filter screen on the screw pump, automatic gulp valve and relief valve assembly include safe overflow valve and liquid accuse gulp valve, be equipped with the check valve between pans and the overhead tank, be equipped with electric contact manometer, fuel outlet valve and bleed valve on the overhead tank.
2. The hydraulic system of claim 1, wherein the screw pump is driven by an electric motor.
3. The hydraulic system of claim 1, wherein the pressure tank further comprises a level gauge.
4. An oil press hydraulic system as claimed in claim 1, wherein said electro contact pressure gauge is provided with two and a pressure gauge switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120265945.1U CN214424796U (en) | 2021-01-31 | 2021-01-31 | Hydraulic system of oil pressure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120265945.1U CN214424796U (en) | 2021-01-31 | 2021-01-31 | Hydraulic system of oil pressure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214424796U true CN214424796U (en) | 2021-10-19 |
Family
ID=78069876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120265945.1U Active CN214424796U (en) | 2021-01-31 | 2021-01-31 | Hydraulic system of oil pressure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214424796U (en) |
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2021
- 2021-01-31 CN CN202120265945.1U patent/CN214424796U/en active Active
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