CN110749470A - Pressure compensation method and structure of pressure maintaining cabin - Google Patents
Pressure compensation method and structure of pressure maintaining cabin Download PDFInfo
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- CN110749470A CN110749470A CN201911172609.6A CN201911172609A CN110749470A CN 110749470 A CN110749470 A CN 110749470A CN 201911172609 A CN201911172609 A CN 201911172609A CN 110749470 A CN110749470 A CN 110749470A
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- reaction kettle
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000002441 reversible effect Effects 0.000 claims abstract description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 239000002775 capsule Substances 0.000 claims 4
- 239000013049 sediment Substances 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 108010066057 cabin-1 Proteins 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009123 feedback regulation Effects 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
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a pressure compensation method and a structure of a pressure maintaining cabin, belonging to the technical field of pressure maintaining coring equipment, wherein the method utilizes gas generated by chemical reaction to push a piston to change the effective volume of the pressure maintaining cabin for pressure compensation, or introduces gas generated by chemical reaction into the pressure cabin for pressure compensation; the chemical reaction can be a solid-liquid reaction, a liquid-liquid reaction or a reversible reaction under different pressures, and can also be an electrolytic water reaction. The pressure compensation structure of the pressure maintaining cabin comprises a reaction kettle and a pressure cabin, wherein the reaction kettle is connected with the pressure cabin through a pipeline, the pipeline is provided with an electromagnetic valve, and when the pressure in the pressure cabin is lower than a preset value, the electromagnetic valve is opened; when the pressure in the pressure chamber is greater than or equal to the preset value, the electromagnetic valve is closed. The pressure-maintaining coring device can supplement pressure to the pressure cabin, is beneficial to ensuring the pressure-maintaining effect, and has important significance for pressure-maintaining coring of deep-sea sediments.
Description
Technical Field
The invention relates to the technical field of pressure-maintaining coring equipment, in particular to a pressure compensation method and structure of a pressure-maintaining cabin.
Background
After a submarine drilling machine obtains a sample in deep sea, a fidelity cabin pressure maintaining control device is needed to perform pressure maintaining sealing on the sample in an in-situ environment. In the process of pressure-maintaining coring of deep-sea sediments, the fidelity chamber is difficult to leak due to the problems of imperfect sealing means, inaccurate assembly, change of the internal and external pressure difference of a drilling machine and the like. In this case, pressure compensation is particularly important.
Disclosure of Invention
The invention aims to provide a pressure compensation method and a pressure compensation structure for a pressure maintaining cabin, which can supplement pressure to the pressure cabin and have important significance for pressure maintaining coring of deep sea sediments.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a pressure compensation method for a pressure maintaining cabin utilizes gas generated by chemical reaction to push a piston to change the effective volume of the pressure maintaining cabin for pressure compensation, or gas generated by chemical reaction is introduced into the pressure cabin for pressure compensation.
Wherein the chemical reaction is a solid-liquid reaction.
Alternatively, the chemical reaction is a liquid-liquid reaction.
Alternatively, the chemical reaction is a reversible reaction that occurs at different pressures.
Alternatively, the chemical reaction is an electrolytic water reaction.
The pressure compensation structure of the pressure maintaining cabin comprises a reaction kettle and a pressure cabin, wherein the reaction kettle is connected with the pressure cabin through a pipeline, and a pressure sensor is arranged in the pressure cabin.
Wherein, the pipeline is provided with an electromagnetic valve.
Or sodium peroxide is placed in the reaction kettle, and liquid water is filled in the pressure cabin.
Or hydrochloric acid is placed in the reaction kettle, and the pressure chamber is filled with a sodium carbonate aqueous solution.
Or a piston is arranged between the reaction kettle and the pressure cabin.
Compared with the prior art, the invention has the following beneficial effects:
the pressure-maintaining coring device can supplement pressure to the pressure cabin, is beneficial to ensuring the pressure-maintaining effect, and has important significance for pressure-maintaining coring of deep-sea sediments.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic view of the structure of the test pressure chamber;
fig. 3 is a schematic structural diagram of the second embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
Example one
In the pressure compensation method for the pressure maintaining cabin disclosed in this embodiment, gas generated by a chemical reaction is introduced into the pressure cabin for pressure compensation by using the gas generated by the chemical reaction.
The chemical reaction may be a solid-liquid reaction or a liquid-liquid reaction. Such as sodium peroxide with liquid water, hydrochloric acid with aqueous sodium carbonate.
The chemical reaction may also be a reversible reaction that occurs at different pressures. These reversible reactions stabilize the equilibrium at a given pressure. When the reaction is in an equilibrium state, if the gas volume before and after the reaction is not equal, the original equilibrium can be broken by changing the pressure. The reaction proceeds in the direction of increasing gas volume by reducing the pressure, thereby achieving pressure compensation to the ballast side. Three reversible reactions are listed below, with the equilibrium moving to the left if the pressure decreases.
This example illustrates only the above three reversible reactions. However, in practical applications, the reversible reaction of the equilibrium moving towards the direction of increasing the gas volume can be used to compensate the pressure of the pressure-maintaining chamber.
As shown in fig. 1, the pressure compensation structure of the pressure holding chamber disclosed by the invention comprises a reaction kettle 2 and a pressure chamber 1, wherein the reaction kettle 2 is connected with the pressure chamber 1 through a pipeline 3, and an electromagnetic valve 4 is arranged on the pipeline 3.
Wherein, a pressure sensor is arranged in the pressure chamber 1, and a pressure gauge 5 is arranged on the reaction kettle 2.
The method for using the pressure compensation structure of the ballast space in the embodiment is as follows:
the first method is as follows: sodium peroxide is placed in the reaction kettle 2, and liquid water is placed in the pressure chamber 1. When the pressure in the pressure cabin 1 is detected to be smaller than a preset value, the electromagnetic valve 4 is opened, water in the pressure cabin 1 enters the reaction kettle 2 through the pipeline 3 and reacts with sodium peroxide in the reaction kettle 2 to generate oxygen, so that the pressure in the reaction kettle 2 is increased, the oxygen enters the pressure cabin 1 through the pipeline 3, the internal pressure of the pressure cabin 1 is increased, when the internal pressure of the pressure cabin 1 reaches the preset value, the electromagnetic valve 4 is closed, the oxygen and water flow passage is cut off, the reaction in the reaction kettle 2 is stopped, and meanwhile, the pressure in the pressure cabin 1 is kept stable.
The second method comprises the following steps: sodium peroxide is placed in the reaction kettle 2, when the pressure in the pressure cabin 1 is detected to be less than a preset value, liquid water is added into the reaction kettle 2 through a liquid inlet of the reaction kettle 2, and the liquid water and the sodium peroxide in the reaction kettle 2 react to generate oxygen, so that the pressure in the reaction kettle 2 is increased; and opening the electromagnetic valve 4, introducing oxygen into the pressure chamber 1 through the pipeline 3 to increase the internal pressure of the pressure chamber 1, closing the electromagnetic valve 4 when the internal pressure of the pressure chamber 1 reaches a preset value, cutting off an oxygen passage, stopping injecting water into the reaction kettle 2, and stopping reaction in the reaction kettle 2.
The third method comprises the following steps: hydrochloric acid is placed in the reaction kettle 2, and a sodium carbonate aqueous solution is placed in the pressure chamber 1. When the pressure in the pressure chamber 1 is detected to be smaller than a preset value, the electromagnetic valve 4 is opened, a sodium carbonate aqueous solution in the pressure chamber 1 enters the reaction kettle 2 through the pipeline 3 to react with hydrochloric acid in the reaction kettle 2 to generate carbon dioxide, so that the pressure in the reaction kettle 2 is increased, the carbon dioxide enters the pressure chamber 1 through the pipeline 3 to increase the internal pressure of the pressure chamber 1, when the internal pressure of the pressure chamber 1 reaches the preset value, the electromagnetic valve 4 is closed to cut off a passage, the reaction in the reaction kettle 2 is stopped, and meanwhile, the internal pressure of the pressure chamber 1 is kept stable.
The pressurization mode can be applied to a test platform for the pressure maintaining characteristic of the pressure maintaining cabin of the coring device to provide a high-pressure environment for the test cabin. As shown in fig. 2, the pressure chamber 1 includes a cylinder 11, an upper end sealing device for sealing an upper end of the cylinder 11, and a lower end sealing device for sealing a lower end of the cylinder 11.
The upper end sealing device comprises an upper end plug 12, the upper end plug 12 is in threaded connection with the barrel 11, a medium channel 15 communicated with the interior of the barrel 11 is reserved on the upper end plug 12, and the medium channel 15 is externally connected with an external hydraulic source.
The lower end sealing device comprises a flap valve. The flap valve is fixed in the cylinder body 11 through a spring 6, a mounting ring 7 and an external thread part 17; the bottom surface of the valve seat 51 abuts against the male screw member 17, and the male screw member 17 is screwed to the inner wall of the cylinder 11.
The spring 6 is compressed between the valve clack 52 and the mounting ring 7, the inner wall of the cylinder 11 is provided with an inner step 16 for abutting against the mounting ring 7, the upper end of the spring 6 abuts against the mounting ring 7 to enable the mounting ring 7 to abut against the inner step 16, the lower end of the spring 6 abuts against the valve clack 52 to provide initial sealing pressure for the valve clack 52, and a sealing ring is arranged between the valve seat 51 and the cylinder 11.
The upper end plug 12, the external thread part 17 and the inner wall of the barrel body 11 are sealed by installing check rings on the sealing ring 14. The sealing ring 14 is made of polyurethane, and can resist high temperature and high pressure.
The structure can be used for testing the strain of the flap valve in the pressure maintaining cabin and verifying the pressure maintaining capability of flap valves with different structures and different shapes.
The externally threaded member 17 is hollow, and the three-dimensional laser scanning of the outer surface of the valve flap 52 from the hollow portion can be performed by a 3D laser sensor to measure the three-dimensional strain of the outer surface of the valve flap 52.
Example two
The difference between this embodiment and the first embodiment is: as shown in fig. 3, the pressure compensation structure of the pressure-maintaining chamber of the present embodiment includes a reaction vessel 2 and a pressure chamber 1, the reaction vessel 2 is connected to the pressure chamber 1 through a pipeline 3, a piston 8 is disposed in the pipeline 3, and the piston 8 plays a role in isolating gas and liquid.
The present embodiment can utilize the gas of the chemical reaction to push the piston to change the effective volume of the pressure chamber 1 for pressure compensation.
The method for using the pressure compensation structure of the ballast space in the embodiment is as follows:
the first method is as follows: when the pressure in the pressure chamber 1 is smaller than the preset value, the electrolytic water in the reaction kettle 2 is started to react, the electrolytic water reacts to generate oxygen and hydrogen, the pressure in the reaction kettle 2 is increased, the piston 8 is further pushed to move towards the side of the pressure chamber 1, the effective volume of the pressure chamber 1 is reduced, and therefore the internal pressure is increased. The electrolyzed water reaction compensates for pressure by controlling the electrical power.
The second method comprises the following steps: the reaction kettle 2 is provided with NH3、SO3、N2O4When the pressure in the pressure chamber 1 is reduced to a certain degree, the piston 8 moves a distance in the pressure chamber 1, and simultaneously the pressure in the reaction kettle 2 is reduced, so that the balance of the following reversible reaction moves leftwards, the pressure in the reaction kettle 2 is continuously increased, the piston 8 is continuously pushed to move towards the pressure chamber 1, the effective volume of the pressure chamber 1 is reduced, and the internal pressure is increased. If the supply is still insufficient, the gas in the reaction vessel 2 is heated to move the piston 8 to the pressure chamber 1 side.
Due to the adoption of the balance moving principle, the compensation method cannot completely maintain the original pressure of the pressure maintaining cabin, and can only slow down the pressure drop to a certain extent. If the pressure is required to be completely maintained, a PID temperature control module is required to be designed to control the temperature of the reversible reaction in the reaction kettle, so that the balance movement is accurately controlled, and 100% intelligent compensation of the pressure is realized.
In the embodiment, gas and liquid are isolated by the piston, the areas of two sides of the piston are different, and the area of the piston on the gas side is designed to be larger so as to amplify the pressure on the gas side.
The high-pressure container can be safely used and has great significance for reducing the cost of the reaction kettle.
The pressure-maintaining coring device can actively supplement pressure to the pressure cabin, can realize feedback regulation, is favorable for ensuring the pressure-maintaining effect of the coring device, and has important significance for pressure-maintaining coring of deep-sea sediments.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (10)
1. A pressure compensation method for a pressure maintaining cabin is characterized by comprising the following steps: and pushing the piston to change the effective volume of the pressure maintaining cabin by using gas generated by the chemical reaction to perform pressure compensation, or introducing the gas generated by the chemical reaction into the pressure cabin to perform pressure compensation.
2. The method of pressure compensation of a holding pressure capsule according to claim 1, characterized in that: the chemical reaction is a solid-liquid reaction.
3. The method of pressure compensation of a holding pressure capsule according to claim 1, characterized in that: the chemical reaction is a liquid-liquid reaction.
4. The method of pressure compensation of a holding pressure capsule according to claim 1, characterized in that: the chemical reaction is a reversible reaction that occurs at different pressures.
5. The method of pressure compensation of a holding pressure capsule according to claim 1, characterized in that: the chemical reaction is an electrolytic water reaction.
6. The utility model provides a pressurize cabin pressure compensation structure which characterized in that: the device comprises a reaction kettle and a pressure cabin, wherein the reaction kettle is connected with the pressure cabin through a pipeline, and a pressure sensor is arranged in the pressure cabin.
7. The holding pressure cabin pressure compensation structure according to claim 6, characterized in that: the pipeline is provided with an electromagnetic valve.
8. The holding pressure cabin pressure compensation structure according to claim 7, characterized in that: sodium peroxide is placed in the reaction kettle, and liquid water is placed in the pressure cabin.
9. The holding pressure cabin pressure compensation structure according to claim 7, characterized in that: hydrochloric acid is placed in the reaction kettle, and a sodium carbonate aqueous solution is placed in the pressure chamber.
10. The holding pressure cabin pressure compensation structure according to claim 6, characterized in that: a piston is arranged between the reaction kettle and the pressure cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911172609.6A CN110749470A (en) | 2019-11-26 | 2019-11-26 | Pressure compensation method and structure of pressure maintaining cabin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172609.6A CN110749470A (en) | 2019-11-26 | 2019-11-26 | Pressure compensation method and structure of pressure maintaining cabin |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477084A (en) * | 2020-03-26 | 2020-07-31 | 南方海洋科学与工程广东省实验室(广州) | Deep sea cold spring ecosystem formation evolution simulation system and method |
| CN111977005A (en) * | 2020-09-02 | 2020-11-24 | 罗成 | Transmission line inspection unmanned aerial vehicle based on 5G communication |
| CN114940250A (en) * | 2022-05-17 | 2022-08-26 | 浙江杰记科技有限公司 | Deep sea automatic pressure balance control system and method |
| CN115182694A (en) * | 2022-07-19 | 2022-10-14 | 平顶山天安煤业股份有限公司 | Fidelity coring gas self-gain pressure control structure, coring device and control method |
| CN118292788A (en) * | 2024-06-06 | 2024-07-05 | 中国煤炭地质总局勘查研究总院 | Pressure maintaining coring device for deep coal seam |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477084A (en) * | 2020-03-26 | 2020-07-31 | 南方海洋科学与工程广东省实验室(广州) | Deep sea cold spring ecosystem formation evolution simulation system and method |
| CN111477084B (en) * | 2020-03-26 | 2021-09-28 | 南方海洋科学与工程广东省实验室(广州) | Deep sea cold spring ecosystem formation evolution simulation system and method |
| CN111977005A (en) * | 2020-09-02 | 2020-11-24 | 罗成 | Transmission line inspection unmanned aerial vehicle based on 5G communication |
| CN111977005B (en) * | 2020-09-02 | 2023-10-13 | 国网江苏省电力有限公司苏州供电分公司 | 5G communication-based power transmission line inspection unmanned aerial vehicle |
| CN114940250A (en) * | 2022-05-17 | 2022-08-26 | 浙江杰记科技有限公司 | Deep sea automatic pressure balance control system and method |
| CN115182694A (en) * | 2022-07-19 | 2022-10-14 | 平顶山天安煤业股份有限公司 | Fidelity coring gas self-gain pressure control structure, coring device and control method |
| CN115182694B (en) * | 2022-07-19 | 2023-05-09 | 平顶山天安煤业股份有限公司 | Fidelity coring gas self-gain pressure control structure, coring device and control method |
| CN118292788A (en) * | 2024-06-06 | 2024-07-05 | 中国煤炭地质总局勘查研究总院 | Pressure maintaining coring device for deep coal seam |
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