CN220667767U - Circulating fluid constant pressure difference circulating system - Google Patents
Circulating fluid constant pressure difference circulating system Download PDFInfo
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- CN220667767U CN220667767U CN202322114568.3U CN202322114568U CN220667767U CN 220667767 U CN220667767 U CN 220667767U CN 202322114568 U CN202322114568 U CN 202322114568U CN 220667767 U CN220667767 U CN 220667767U
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- constant pressure
- pipeline
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- 239000012530 fluid Substances 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 38
- 239000002608 ionic liquid Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model relates to the technical field of circulating liquid seal compressors, in particular to a circulating liquid constant pressure difference circulating system. The circulating pump comprises a circulating cavity, wherein a liquid inlet of the circulating cavity is connected with a liquid outlet of the circulating pump through a liquid inlet pipeline, a liquid inlet of the circulating pump is connected with a circulating liquid filling port through a liquid adding pipeline, a liquid outlet of the circulating cavity is connected with a constant pressure difference piston structure through a liquid outlet pipeline, the constant pressure difference piston structure is connected with the liquid inlet pipeline through a liquid return pipeline, the constant pressure difference piston structure comprises a piston sleeve, a piston is arranged in the piston sleeve, a guide belt and a Gelai ring are arranged between the piston and the piston sleeve, the piston sleeve is connected with the liquid outlet pipeline through a circulating liquid connector, the other end of the piston sleeve is connected with compressed gas through a gas connector, and a spring is arranged between the piston and the piston sleeve close to one end of the gas connector. The constant pressure difference between the circulating hydraulic pressure and the pressure of the compressed gas is realized, the circulating hydraulic pressure in the circulating cavity can be kept to be always larger than the pressure of the compressed gas, and the compressed gas is prevented from leaking outwards through the circulating liquid in the circulating cavity.
Description
Technical field:
the utility model relates to the technical field of circulating liquid seal compressors, in particular to a circulating liquid constant pressure difference circulating system.
The background technology is as follows:
the circulating liquid seal compressor drives a piston in a cylinder body of the cylinder to reciprocate mainly through a driving mechanism so as to realize supercharging of gas. As in the patent application publication No. CN114439728A, a circulating liquid seal compressor is disclosed, which is configured to store a circulating liquid by providing an annular chamber between a piston and a cylinder block, to achieve lubrication, cooling and sealing by the circulating liquid, and to keep the circulating liquid continuously circulating by providing a circulating pump in a circulating liquid circuit. When the circulating hydraulic pressure in the annular cavity is required to be higher than the pressure of compressed gas so as to avoid outward leakage of the gas through the circulating liquid, the pressure of the compressed gas is generally 45-50MPa, and therefore, the pressure of the circulating pump is only required to be higher than the pressure of the compressed gas by 0.1-0.5MPa. However, in the existing circulation system, a constant pressure difference cannot be realized only by means of the circulation pump, because the pressure of the compressed gas is unstable and can be increased or reduced at any time during operation, the fact that the pressure of the circulation pump is only 0.1-0.5MPa higher than that of the compressed gas is not realistic, the condition that the pressure of the compressed gas is higher than that of the circulation pump easily occurs, the gas is leaked outwards through the circulation liquid, and particularly for hydrogen, the danger of inflammability and explosiveness easily occurs. Therefore, the existing circulating pump pressure can only be set far larger than the floating pressure peak value of the compressed gas so as to ensure that the leakage of the compressed gas is avoided, but the existing circulating pump pressure can only be realized by means of increasing the power of the circulating pump, so that the energy waste is caused.
In summary, the constant pressure difference circulation problem of the circulating liquid in the circulating liquid seal compressor has become a technical problem to be solved in industry.
The utility model comprises the following steps:
the utility model provides a circulating liquid constant pressure difference circulating system for overcoming the defects of the prior art, solves the problem that constant pressure difference between circulating liquid pressure and compressed gas pressure cannot be realized in the past, and solves the problem of energy waste caused by increasing the circulating liquid pressure by adopting a high-power circulating pump in the past.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides a circulating fluid constant pressure differential circulation system, includes the circulation chamber, and the inlet of circulation chamber links to each other with the liquid outlet of circulating pump through the feed liquor pipeline, and the inlet of circulating pump links to each other with circulating fluid filler inlet through the liquid feeding pipeline, and the liquid outlet of circulation chamber links to each other with constant pressure differential piston structure through liquid outlet pipeline, and constant pressure differential piston structure links to each other with the feed liquor pipeline through liquid return pipeline, constant pressure differential piston structure includes the piston sleeve, is equipped with the piston in the piston sleeve, is equipped with guiding strip and gray circle between piston and the piston sleeve, and the one end of piston sleeve links to each other with liquid outlet pipeline through circulating fluid connector, and the other end of piston sleeve links to each other with compressed gas through the gas connector, is equipped with the spring between piston and the piston sleeve that is close to gas connector one end.
And the liquid inlet and the liquid outlet of the circulating cavity are respectively provided with a one-way valve.
The liquid adding pipeline is provided with a needle valve.
And the liquid outlet pipeline is provided with a pressure sensor, a pressure gauge and an overflow valve.
And a heat exchanger is arranged on the liquid return pipeline.
The circulating pump adopts a quantitative plunger pump.
The overflow valve is connected with the circulating liquid filling port through an overflow pipeline.
The piston and the piston sleeve are made of 4Cr13 stainless steel.
The spring is made of 17-7PH stainless steel, and the gas joint is made of 316L stainless steel.
The pressure of the spring to the piston is 0.1-0.5MPa.
The utility model adopts the scheme and has the following advantages:
through setting up constant pressure difference piston structure in circulation liquid return circuit, piston one side and circulation liquid intercommunication, the opposite side is equipped with the spring and communicates with compressed gas, along with the increase or the reduction of compressed gas pressure, the piston can be incessantly removed, and keep a relative balance, circulation chamber's pressure also can along with increasing or reducing, and keep a invariable pressure differential, thereby realized that circulation hydraulic pressure and compressed gas pressure keep invariable pressure differential between, circulation hydraulic pressure in the circulation chamber can keep being greater than compressed gas's pressure all the time, avoid the compressed gas to pass circulation liquid outside leakage in the circulation chamber, only need design the power that the spring acted on the piston as 0.1-0.5MPa, just can greatly reduced circulation pump's power, reach energy saving and consumption reduction's purpose.
Description of the drawings:
fig. 1 is a schematic diagram of the structural principle of the present utility model.
FIG. 2 is a schematic cross-sectional view of a constant pressure differential piston configuration of the present utility model.
In the figure, 1, a circulating cavity, 2, a liquid inlet pipeline, 3, a circulating pump, 4, a liquid adding pipeline, 5, a circulating liquid adding port, 6, a liquid outlet pipeline, 7, a constant pressure difference piston structure, 8, a liquid return pipeline, 9, a piston sleeve, 10, a piston, 11, a guide belt, 12, a Grignard ring, 13, a circulating liquid joint, 14, a gas joint, 15, a spring, 16, a one-way valve, 17, a needle valve, 18, a pressure sensor, 19, a pressure gauge, 20, an overflow valve, 21, a heat exchanger, 22 and an overflow pipeline.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-2, a circulating liquid constant pressure difference circulating system comprises a circulating cavity 1, wherein a liquid inlet of the circulating cavity 1 is connected with a liquid outlet of a circulating pump 3 through a liquid inlet pipeline 2, a liquid inlet of the circulating pump 3 is connected with a circulating liquid filling port 5 through a liquid filling pipeline 4, a liquid outlet of the circulating cavity 1 is connected with a constant pressure difference piston structure 7 through a liquid outlet pipeline 6, the constant pressure difference piston structure 7 is connected with the liquid inlet pipeline 2 through a liquid return pipeline 8, the constant pressure difference piston structure 7 comprises a piston sleeve 9, a piston 10 is arranged in the piston sleeve 9, a guide belt 11 and a gray ring 12 are arranged between the piston 10 and the piston sleeve 9, the guide belt 11 and the gray ring 12 are arranged on the outer surface of the piston 10, the gray ring 12 can meet the requirement of high-pressure sealing, one end of the piston sleeve 9 is connected with the liquid outlet pipeline 6 through a circulating liquid joint 13, the other end of the piston sleeve 9 is connected with compressed gas through a gas joint 14, and a spring 15 is arranged between the piston 10 and the piston sleeve 9 near one end of the gas joint 14.
The liquid inlet and the liquid outlet of the circulation cavity 1 are respectively provided with a one-way valve 16.
The liquid adding pipeline 4 is provided with a needle valve 17 for exhausting the gas in the pipeline.
The liquid outlet pipeline 6 is provided with a pressure sensor 18, a pressure gauge 19 and an overflow valve 20. The pressure sensor 18 can detect the circulating hydraulic pressure in the liquid outlet pipeline 6 and display the circulating hydraulic pressure through the pressure gauge 19, when the circulating hydraulic pressure is overlarge, the overflow valve 20 can overflow, so that overpressure protection is realized, the overflow valve 20 is connected with the circulating liquid filling port 5 through the overflow pipeline 22, and the overflowed circulating liquid can be returned to the circulating liquid filling port 5 for recycling.
The liquid return pipeline 8 is provided with a heat exchanger 21 for keeping the constant temperature of the circulating liquid.
The circulating pump 3 adopts a quantitative plunger pump. The sealing grade of the quantitative plunger pump is high, the pressure parameter of more than 45-50MPa can be achieved, and the circulating liquid is easy to keep in a high-pressure state for circulation.
The piston 10 and the piston sleeve 9 are made of 4Cr13 stainless steel, and have the advantages of high hardness, high wear resistance and the like.
The spring 15 is made of 17-7PH stainless steel, the gas connector 14 is made of 316L stainless steel, and the spring contacts with compressed gas to improve the corrosion resistance.
The pressure of the spring 15 to the piston 10 is 0.1-0.5MPa, so that the power of the circulating pump 3 can be greatly reduced.
The circulating liquid in the circulating cavity 1 comprises lubricating oil, water or ionic liquid and other liquids. Preferably, the ionic liquid is adopted in the method, and has the advantages of no pollution, easy separation from products, easy recovery and repeated recycling, and even if leakage occurs, the ionic liquid cannot pollute the gas.
Working principle:
before working, circulating liquid is filled into the whole circulating system through the circulating liquid filling port 5 under the pumping of the circulating pump 3, gas in the system is discharged through the needle valve 17, and when the gas is no longer in the system, the needle valve 17 is closed. When the needle valve 17 is closed, the whole circulation system circulates internally under the action of the circulation pump 3, circulating liquid enters the circulation cavity 1 through the liquid inlet pipeline 2, then enters the constant pressure difference piston structure 7 through the liquid outlet pipeline 6, and then flows back to the liquid inlet pipeline 2 through the liquid return pipeline 8 for internal circulation. One side of the piston 10 is communicated with circulating liquid through a circulating liquid joint 13, the other side is provided with a spring 15 and is communicated with compressed gas through a gas joint 14, and the force of the circulating liquid acting on the piston 10 is F 1 The force of the compressed gas acting on the piston 10 is F h The force of the spring 15 acting on the piston 10 is F k F when the stress on the two sides of the piston 10 is balanced 1 ＝F h +F k At this time, the piston 10 is stopped, the piston 10 is continuously moved with the increase or decrease of the pressure of the compressed gas, and the pressure of the circulation chamber 1 is increased or decreased with the corresponding balance, and a constant pressure difference is maintained, and the pressure difference is that the force of the spring 15 acting on the piston 10 is F k Thereby realizing the constant pressure difference between the circulating hydraulic pressure and the pressure of the compressed gas, keeping the circulating hydraulic pressure in the circulating cavity 1 always larger than the pressure of the compressed gas, avoiding the leakage of the compressed gas outwards through the circulating liquid in the circulating cavity 1, and only needing to apply the force F of the spring 15 on the piston 10 k The design is 0.1-0.5MPa, so that the power of the circulating pump 3 can be greatly reduced, and the purposes of energy conservation and consumption reduction are achieved.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (10)
1. A circulating fluid constant pressure difference circulating system is characterized in that: the circulating pump comprises a circulating cavity, wherein a liquid inlet of the circulating cavity is connected with a liquid outlet of the circulating pump through a liquid inlet pipeline, a liquid inlet of the circulating pump is connected with a circulating liquid filling port through a liquid adding pipeline, a liquid outlet of the circulating cavity is connected with a constant pressure difference piston structure through a liquid outlet pipeline, the constant pressure difference piston structure is connected with the liquid inlet pipeline through a liquid return pipeline, the constant pressure difference piston structure comprises a piston sleeve, a piston is arranged in the piston sleeve, a guide belt and a Gelai ring are arranged between the piston and the piston sleeve, one end of the piston sleeve is connected with the liquid outlet pipeline through a circulating liquid connector, the other end of the piston sleeve is connected with compressed gas through a gas connector, and a spring is arranged between the piston and the piston sleeve close to one end of the gas connector.
2. The circulating fluid constant pressure differential circulating system of claim 1, wherein: and the liquid inlet and the liquid outlet of the circulating cavity are respectively provided with a one-way valve.
3. The circulating fluid constant pressure differential circulating system of claim 1, wherein: the liquid adding pipeline is provided with a needle valve.
4. The circulating fluid constant pressure differential circulating system of claim 1, wherein: and the liquid outlet pipeline is provided with a pressure sensor, a pressure gauge and an overflow valve.
5. The circulating fluid constant pressure differential circulating system of claim 1, wherein: and a heat exchanger is arranged on the liquid return pipeline.
6. The circulating fluid constant pressure differential circulating system of claim 1, wherein: the circulating pump adopts a quantitative plunger pump.
7. The circulating fluid constant pressure differential circulating system of claim 4 wherein: the overflow valve is connected with the circulating liquid filling port through an overflow pipeline.
8. The circulating fluid constant pressure differential circulating system of claim 1, wherein: the piston and the piston sleeve are made of 4Cr13 stainless steel.
9. The circulating fluid constant pressure differential circulating system of claim 1, wherein: the spring is made of 17-7PH stainless steel, and the gas joint is made of 316L stainless steel.
10. The circulating fluid constant pressure differential circulating system of claim 1, wherein: the pressure of the spring to the piston is 0.1-0.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322114568.3U CN220667767U (en) | 2023-08-07 | 2023-08-07 | Circulating fluid constant pressure difference circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322114568.3U CN220667767U (en) | 2023-08-07 | 2023-08-07 | Circulating fluid constant pressure difference circulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220667767U true CN220667767U (en) | 2024-03-26 |
Family
ID=90332383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322114568.3U Active CN220667767U (en) | 2023-08-07 | 2023-08-07 | Circulating fluid constant pressure difference circulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220667767U (en) |
-
2023
- 2023-08-07 CN CN202322114568.3U patent/CN220667767U/en active Active
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