CN215762492U - Constant pressure hydraulic oil tank - Google Patents
Constant pressure hydraulic oil tank Download PDFInfo
- Publication number
- CN215762492U CN215762492U CN202121200286.XU CN202121200286U CN215762492U CN 215762492 U CN215762492 U CN 215762492U CN 202121200286 U CN202121200286 U CN 202121200286U CN 215762492 U CN215762492 U CN 215762492U
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- air
- hydraulic oil
- check valve
- oil tank
- exhaust
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Abstract
The utility model discloses a constant-pressure hydraulic oil tank, and belongs to the field of hydraulic pressure. The defect that the main pump is easily pumped to be empty when the external air pressure is reduced in the hydraulic oil tank in the prior art is overcome. Including the hydraulic tank body, blast pipe, intake pipe one, exhaust check valve and the check valve that admits air, the exhaust check valve passes through the internal portion of blast pipe intercommunication hydraulic tank, the check valve that admits air passes through the internal portion of intake pipe one intercommunication hydraulic tank, still includes air compressor and intake pipe two, air compressor passes through two intercommunication check valves that admit air of intake pipe. The utility model provides high-pressure gas through the air compressor, and the internal air pressure of the hydraulic oil tank is constant no matter how the internal liquid level and the external air pressure change, so that the air suction of the main pump can be prevented.
Description
Technical Field
The utility model belongs to a hydraulic oil tank, and particularly relates to a constant-pressure hydraulic oil tank.
Background
In a hydraulic system of an engineering mechanical product, a main pump sucks hydraulic oil from a hydraulic oil tank and supplies the hydraulic oil to a hydraulic oil cylinder for action, and the areas of a large cavity and a small cavity of the hydraulic oil cylinder are different, so that the quantity of the hydraulic oil required in the movement process is different, the liquid level of the hydraulic oil in the hydraulic oil tank can float up and down, and the volume of air in the hydraulic oil tank can change along with the liquid level; in order to ensure the oil absorption capacity of the main pump and prevent emptying, two one-way valves are generally arranged on a hydraulic oil tank, the pressure of one-way valve is small to ensure that the liquid level of the hydraulic oil tank is fully fed after the liquid level of the hydraulic oil tank is reduced, the other one-way valve ensures that certain high pressure is generated when the liquid level of the hydraulic oil tank is increased to prevent gas from being discharged to provide certain oil absorption pressure for the main pump, and the air pressure in the hydraulic oil tank is higher at the moment; above whole process results in gas pressure in the hydraulic tank to make a round trip to switch in the middle of low pressure and high pressure always, does benefit to the main pump oil absorption during high pressure, is unfavorable for the main pump oil absorption during the low pressure, easily causes the main pump to empty when external atmospheric pressure reduces.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a constant-pressure hydraulic oil tank to overcome the defect that the suction of a main pump is easy to empty when the external air pressure of the hydraulic oil tank is reduced in the prior art.
The utility model is realized by adopting the following technical scheme:
the utility model provides a constant voltage type hydraulic tank, includes the hydraulic tank body, blast pipe, intake pipe one, exhaust check valve and the check valve that admits air, the exhaust check valve passes through the internal portion of blast pipe intercommunication hydraulic tank, the check valve that admits air passes through the internal portion of intake pipe one intercommunication hydraulic tank, still includes air compressor and intake pipe two, air compressor passes through two intercommunication check valves that admit air of intake pipe.
Furthermore, an air filtering filter element is connected to the second air inlet pipe.
Furthermore, air compressor, air filter core, exhaust check valve, the check valve that admits air are fixed in on the support, the support passes through the lower part screw thread and is connected with the flange that admits air on the hydraulic oil box.
The air inlet check valve is arranged in the air inlet channel, and the air outlet check valve is arranged in the air outlet channel.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides high-pressure gas through the air compressor, and the internal air pressure of the hydraulic oil tank is constant no matter how the internal liquid level and the external air pressure change, so that the air suction of the main pump can be prevented.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a working principle diagram of the present invention.
In the figure: 1. a hydraulic tank body; 2. an air inlet flange; 3. a support; 4. a one-way valve integration module; 5. an air filtration cartridge; 6. a second air inlet pipe; 7. an air compressor; 8. a first air inlet pipe; 9. an exhaust pipe; 10. an exhaust check valve; 11. an air inlet check valve; 12. a main pump; 13. a main valve; 14. a hydraulic cylinder.
Detailed Description
The utility model will be further explained with reference to the drawings.
As shown in fig. 1 and 2, the constant-pressure hydraulic oil tank comprises a hydraulic oil tank body 1, a first air inlet pipe 8, an exhaust pipe 9, an exhaust check valve 10 and a check air inlet valve 11, wherein the exhaust check valve 10 is communicated with the inside of the hydraulic oil tank body 1 through the exhaust pipe 9, and the check air inlet valve 11 is communicated with the inside of the hydraulic oil tank body 1 through the first air inlet pipe 8; the constant-pressure hydraulic oil tank further comprises an air compressor 7 and a second air inlet pipe 6, and the air compressor 7 is connected with an air inlet check valve 11 through the second air inlet pipe 6.
And an air filtering filter element 5 is connected to the second air inlet pipe 6, and the air filtering filter element 5 is used for filtering impurities in air to ensure the purity of air inlet.
The air filtering filter element 5, the air compressor 7, the exhaust one-way valve 10 and the air inlet one-way valve 11 are fixed on the bracket 3, and the bracket 3 is connected with the air inlet flange 2 on the hydraulic oil tank body 1 through lower threads.
The constant-pressure hydraulic oil tank further comprises a one-way valve integration module 4, an air inlet channel and an air exhaust channel are arranged in the one-way valve integration module 4, an air inlet one-way valve 11 is arranged in the air inlet channel, and an air exhaust one-way valve 10 is arranged in the air exhaust channel.
The working principle of the utility model is as follows: the air compressor 7 provides high-pressure air, the high-pressure air is filtered by the air inlet pipe II 6 and the air filtering filter element 5, enters the air inlet one-way valve 11 and is supplied to the hydraulic oil tank, the air is discharged through the exhaust pipe 9 and the exhaust one-way valve 10, and the exhaust one-way valve 10 is used for setting the pressure required by the hydraulic oil tank; the air compressor 7 is operated all the time, the air pressure of the hydraulic oil tank is maintained at the set pressure of the exhaust check valve 10 all the time, and the air pressure in the hydraulic oil tank is constant no matter how the liquid level in the hydraulic oil tank changes and how the external air pressure changes.
Claims (4)
1. The utility model provides a constant voltage type hydraulic tank, includes the hydraulic tank body (1), blast pipe (9), intake pipe (8), exhaust check valve (10) and admit air check valve (11), inside exhaust check valve (10) communicate hydraulic tank body (1) through blast pipe (9), admit air check valve (11) through inside intake pipe (8) intercommunication hydraulic tank body (1), its characterized in that: the air compressor is characterized by further comprising an air compressor (7) and a second air inlet pipe (6), wherein the air compressor (7) is communicated with the air inlet one-way valve (11) through the second air inlet pipe (6).
2. The constant pressure type hydraulic oil tank as claimed in claim 1, wherein: and the air inlet pipe II (6) is connected with an air filtering filter element (5).
3. The constant pressure type hydraulic oil tank as claimed in claim 1, wherein: air compressor (7), air filter core (5), exhaust check valve (10), air inlet check valve (11) are fixed in on support (3), support (3) are connected through lower part screw thread and air inlet flange (2) on the hydraulic tank body (1).
4. The constant pressure type hydraulic oil tank as claimed in claim 1, 2 or 3, wherein: the air-intake and exhaust integrated valve is characterized by further comprising a one-way valve integrated module (4), wherein two air-intake and exhaust channels are arranged in the one-way valve integrated module (4), an air-intake one-way valve (11) is arranged in the air-intake channel, and an exhaust one-way valve (10) is arranged in the exhaust channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121200286.XU CN215762492U (en) | 2021-05-31 | 2021-05-31 | Constant pressure hydraulic oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121200286.XU CN215762492U (en) | 2021-05-31 | 2021-05-31 | Constant pressure hydraulic oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215762492U true CN215762492U (en) | 2022-02-08 |
Family
ID=80098756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121200286.XU Active CN215762492U (en) | 2021-05-31 | 2021-05-31 | Constant pressure hydraulic oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215762492U (en) |
-
2021
- 2021-05-31 CN CN202121200286.XU patent/CN215762492U/en active Active
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