CN210293344U - Flow measuring device for submarine hydrocarbon natural gas - Google Patents
Flow measuring device for submarine hydrocarbon natural gas Download PDFInfo
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- CN210293344U CN210293344U CN201920894509.3U CN201920894509U CN210293344U CN 210293344 U CN210293344 U CN 210293344U CN 201920894509 U CN201920894509 U CN 201920894509U CN 210293344 U CN210293344 U CN 210293344U
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Abstract
The utility model discloses submarine measuring's technical field, more specifically relates to submarine hydrocarbon natural gas flow measuring device, include the gas collection room of being connected with bubble collection device, with the valve that gas collection room intercommunication set up and be used for instructing the first liquid level electrode, the second liquid level electrode of liquid level change, the top of gas collection room is located to valve, first liquid level electrode, the bottom of gas collection room is located to the second liquid level electrode. The utility model discloses the natural gas of upwards seepage passes through the bubble collection device and enters into in the volumetric gas collection of ration, the indoor sea water of gas collection is got rid of downwards, when the position of liquid level arrival second liquid level electrode, control flap opens, the indoor gas of gas collection is by the evacuation while the indoor sea water liquid level of gas collection rises, submarine hydrocarbon natural gas flow is surveyed in such circulation, not only can be used for shallow sea seabed natural gas seepage normal position flow on-line measuring, but also can be used for deep sea seabed natural gas seepage normal position flow on-line measuring.
Description
Technical Field
The utility model relates to a subsea measurement's technical field, more specifically relates to submarine hydrocarbon natural gas flow measuring device.
Background
The amount of methane released into the ocean's body of water and atmosphere by the leakage of subsea cold spring natural gas annually is very surprising, initially estimated to be greater than 10Tg (1012g) per year, whereas methane is a strong greenhouse gas with a greenhouse effect that is more than 20 times the same mass of carbon dioxide, and such a huge amount of methane is an important contributor to global climate change. Therefore, the method has important economic value and scientific significance for online in-situ detection of the natural gas leakage rate of the seabed cold spring. At present, research on seabed cold spring natural gas leakage in-situ flow online measuring devices in China has been carried out, two sets of seabed cold spring natural gas leakage in-situ flow online measuring devices have been successfully developed by Guangzhou geochemistry research institute of Chinese academy of sciences, the blank of China in the field is filled, however, the two sets of successfully developed devices are difficult to be used for deep sea observation due to the limitation of materials, components and the like, and the error of a flow measurement result is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art not enough, provide submarine hydrocarbon natural gas flow measuring device, adopt liquid level electrode probe to instruct liquid level change survey submarine natural gas seepage flow, can not only be used for shallow sea seabed cold spring natural gas seepage normal position flow on-line measuring, can be used for deep sea seabed cold spring natural gas seepage normal position flow on-line measuring moreover.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a submarine hydrocarbon natural gas flow measuring device, including the gas collection room of being connected with bubble collection device, with the valve that the gas collection room intercommunication set up and be used for instructing the first liquid level electrode, the second liquid level electrode of the interior liquid level change of gas collection room, the top of gas collection room is located to the valve, the top of gas collection room is located to first liquid level electrode, the bottom of gas collection room is located to the second liquid level electrode, the gas collection room is equipped with the outlet.
The utility model discloses a submarine hydrocarbon natural gas flow measuring device, the natural gas of upwards seepage pass through the bubble collection device and enter into quantitative volumetric gas collection indoor, and the sea water in the gas collection indoor is got rid of downwards, and when the liquid level reachd the position of second liquid level electrode, control flap opened, and the indoor gaseous sea water liquid level of gas collection indoor is risen by evacuation while gas collection, so circulation. The utility model discloses a submarine hydrocarbon natural gas flow is measured to drainage gas collection method, not only can be used for shallow sea seabed natural gas seepage normal position flow on-line measuring, can be used for deep sea seabed natural gas seepage normal position flow on-line measuring moreover, and the cyclic measurement can effectively reduce the measuring error of flow.
Further, first liquid level electrode is the same with second liquid level electrode structure, including integrative fixing base and the connecting rod that sets up and inside intercommunication is equipped with the cavity, the connecting rod passes the gas collection room and is connected with the mounting, be equipped with signal connection's probe and cable in the cavity, the one end of probe stretches into the indoor setting of gas collection. The probe is used for detecting the liquid level change in the gas collection chamber, and the cable is used for transmitting data detected by the probe; the probe and the cable are fixed on the wall body of the gas collection chamber through the fixing seat, the connecting rod and the fixing piece, the stability of the fixed connection is good, and the device can be suitable for monitoring the deep sea environment.
Further, the terminal surface of fixing base and the indoor internal contact setting of gas collection, the terminal surface of fixing base is equipped with the slot, the ditch inslot is equipped with the sealing washer. The setting up of sealing washer increases the stability of being connected between fixing base and the gas collection room on the one hand, improves the leakproofness between fixing base and the gas collection room on the one hand, guarantees the job stabilization nature of deep sea environment.
Furthermore, the outer wall of the connecting rod is provided with an external thread, and an internal thread matched with the external thread is arranged in the fixing piece. The adoption threaded connection is convenient for the installation and the dismantlement of probe and cable, and has better connection stability.
Furthermore, the probes are divided into two groups, and the two groups of probes are arranged in parallel. Two sets of probes simultaneously survey the indoor liquid level change of gas collection, effectively reduce measuring error.
Further, the cavity is filled with a sealing material. The sealing material is filled in the cavity, so that the sealing performance of the gas collecting chamber and the connection stability of the probe and the cable can be effectively guaranteed.
Further, the cable is equipped with first output and second output, first output ground connection sets up, the second output is connected in the one end of resistance, and the power is connected to the other end of resistance, the second output still is connected with the voltage detection end of being connected with detection control chip.
Further, the resistance value R of the resistor is calculated according to the following formula:
Vil/R0＝(Vcc-Vil)/R
in the formula, R0Is the resistance value of the seawater on-resistance, Vil is the low level input voltage value, VccIs the power supply input voltage value.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a submarine hydrocarbon natural gas flow is measured to drainage gas collection method, not only can be used for shallow sea seabed natural gas seepage normal position flow on-line measuring, can be used for deep sea seabed natural gas seepage normal position flow on-line measuring moreover, and the cyclic measurement can effectively reduce the measuring error of flow.
Drawings
FIG. 1 is a schematic structural diagram of a subsea hydrocarbon natural gas flow measurement device;
FIG. 2 is a schematic structural view of a first liquid level electrode and a second liquid level electrode;
FIG. 3 is a schematic diagram of an applied circuit connection of a first liquid level electrode and a second liquid level electrode;
in the drawings: 100-a gas collection chamber; 200-a valve; 300-a first level electrode; 400-a second liquid level electrode; 401-a cavity; 402-a fixed seat; 403-a connecting rod; 404-a fixture; 405-a probe; 406-a cable; 407-trench; 408-a sealing ring; 409-external threads; 410-sealing material; 411 — first output; 412-a second output; 413-resistance; 414-voltage detection terminal; 500-detecting a control chip; 600-storage module.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Example one
Fig. 1 to 3 show an embodiment of the subsea hydrocarbon natural gas flow rate measuring device according to the present invention, which includes a gas collecting chamber 100 connected to the bubble collecting device, a valve 200 communicating with the gas collecting chamber 100 and disposed therein, and a first liquid level electrode 300 and a second liquid level electrode 400 for indicating a liquid level change in the gas collecting chamber 100, wherein the valve 200 is disposed on the top of the gas collecting chamber 100, the first liquid level electrode 300 is disposed on the top of the gas collecting chamber 100, the second liquid level electrode 400 is disposed on the bottom of the gas collecting chamber 100, and the gas collecting chamber 100 is provided with a water outlet. The valve 200 in this embodiment is a pressure-resistant underwater electromagnetic valve, and the first liquid level electrode 300 and the second liquid level electrode 400 are deep-sea environment liquid level electrodes, which are suitable for measuring natural gas flow in a deep-sea environment.
In the implementation of the embodiment, natural gas leaking upwards enters the gas collection chamber 100 with a fixed volume through the bubble collection device, seawater in the gas collection chamber 100 is discharged downwards, when the liquid level reaches the position of the second liquid level electrode 400, the control valve 200 is opened, the gas in the gas collection chamber 100 is emptied, the liquid level of the seawater in the gas collection chamber 100 rises, and the cycle is repeated, the submarine hydrocarbon natural gas measurement is measured based on the water discharge and gas collection method, and the method is suitable for the in-situ flow online measurement of the deep sea natural gas leakage.
As shown in fig. 2, the first liquid level electrode 300 and the second liquid level electrode 400 have the same structure, and include a fixing base 402 and a connecting rod 403 that are integrally disposed and are internally communicated with a cavity 401, the connecting rod 403 passes through the gas collection chamber 100 and is connected to a fixing member 404, a probe 405 and a cable 406 that are connected by signals are disposed in the cavity 401, and one end of the probe 405 extends into the gas collection chamber 100. The probe 405 is used for detecting the liquid level change in the gas collection chamber 100, the cable 406 is used for transmitting the data detected by the probe 405, the fixing seat 402 is a bolt seat, the connecting rod 403 is a bolt, the fixing part 404 is a nut, and the external thread 409 on the bolt is matched with the internal thread of the nut, so that the probe 405 and the cable 406 can be conveniently mounted and dismounted, and the connection stability is better.
In order to increase the connection stability between the fixing base 402 and the gas collecting chamber 100 and improve the sealing performance at the connection position between the fixing base 402 and the gas collecting chamber 100, the end surface of the fixing base 402 of this embodiment is disposed in contact with the inside of the gas collecting chamber 100, the end surface of the fixing base 402 is provided with a groove 407, and a sealing ring 408 is disposed in the groove 407. The groove 407 of the present embodiment is an O-ring and the seal 408 is an O-ring 408, but this is preferable for easy material acquisition and easy processing, and is not a limitation.
In order to ensure the accuracy of liquid level detection, the measurement error is reduced: in this embodiment, there are two sets of probes 405, one end of the cable 406 is in signal connection with the probes 405, the other end of the cable is provided with a first output end 411 and a second output end 412, the first output end 411 is grounded, the second output end 412 is connected to one end of a resistor 413R, the other end of the resistor 413R is connected to a power supply, and the second output end 412 is further connected to a voltage detection end 414 connected to the detection control chip 500; and the probe 405 and the cable 406 are fixed in the cavity 401 by pouring a sealing material 410 in the cavity 401. The sealing material 410 of the present embodiment may be a vulcanized rubber, but it is preferable for obtaining better sealing performance and pouring operability, and is not specified as a limitation.
The resistance R of the resistor 413 can be calculated as follows:
Vil/R0＝(Vcc-Vil)/R
in the formula, R0Is the resistance value of the seawater on-resistance, Vil is the low level input voltage value, VccIs the power supply input voltage value.
In the embodiment, a common TTL level standard is adopted, and when the input voltage Vcc of the control chip is 5V, the required high-level input voltage Vih is more than or equal to 2V, and the required low-level input voltage Vil is less than or equal to 0.8V. Here, assuming that the seawater on-resistance is 100K Ω, the low level of the seawater on-state of the input mark is required to be 0.8V, and if a resistor connected in series with the seawater is provided, there are: 0.8V/100K Ω ═ V/R (5-0.8).
Since R is 525K Ω by calculation, it is sufficient to provide a resistor 413 larger than 525K Ω. For Vcc of 3.3V and for CMOS level, a reasonable series resistor can be found, and the requirement of liquid level detection can be completely met.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The submarine hydrocarbon natural gas flow measuring device is characterized by comprising a gas collecting chamber (100) connected with a bubble collecting device, a valve (200) communicated with the gas collecting chamber (100), a first liquid level electrode (300) and a second liquid level electrode (400), wherein the first liquid level electrode (300) and the second liquid level electrode are used for indicating liquid level change in the gas collecting chamber (100), the valve (200) is arranged at the top of the gas collecting chamber (100), the first liquid level electrode (300) is arranged at the top of the gas collecting chamber (100), the second liquid level electrode (400) is arranged at the bottom of the gas collecting chamber (100), and a water outlet is formed in the gas collecting chamber (100).
2. The subsea hydrocarbon natural gas flow measuring device according to claim 1, wherein the first liquid level electrode (300) and the second liquid level electrode (400) have the same structure, and comprise a fixed base (402) and a connecting rod (403) which are integrally arranged and are internally communicated with each other to form a cavity (401), the connecting rod (403) penetrates through the gas collecting chamber (100) to be connected with the fixed member (404), a probe (405) and a cable (406) which are connected with signals are arranged in the cavity (401), and one end of the probe (405) extends into the gas collecting chamber (100).
3. Subsea hydrocarbon natural gas flow measuring device according to claim 2, characterized in that the end face of the holder (402) is arranged in contact with the inside of the gas collection chamber (100), that the end face of the holder (402) is provided with a groove (407), and that a sealing ring (408) is arranged in the groove (407).
4. The subsea hydrocarbon natural gas flow measuring device according to claim 2, characterized in that the outer wall of the connecting rod (403) is provided with an external thread (409), and the fixing member (404) is provided with an internal thread matching the external thread (409).
5. Subsea hydrocarbon natural gas flow measurement device according to one of the claims 2 to 4, characterized in that the probes (405) are in two groups, the two groups of probes (405) being arranged in parallel.
6. Subsea hydrocarbon natural gas flow measurement device according to claim 5, characterized in that the cavity (401) is filled with a sealing material (410).
7. The subsea hydrocarbon natural gas flow measuring device according to claim 5, wherein the cable (406) is provided with a first output terminal (411) and a second output terminal (412), the first output terminal (411) is grounded, the second output terminal (412) is connected to one end of a resistor (413), the other end of the resistor (413) is connected to a power supply, and the second output terminal (412) is further connected to a voltage detection terminal (414) connected to the detection control chip (500).
8. Subsea hydrocarbon natural gas flow measurement device according to claim 7, characterized in that the resistance value R of the resistor (413) is calculated as follows:
Vil/R0＝(Vcc-Vil)/R
in the formula, R0Is the resistance value of the seawater on-resistance, Vil is the low level input voltage value, VccIs the power supply input voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894509.3U CN210293344U (en) | 2019-06-13 | 2019-06-13 | Flow measuring device for submarine hydrocarbon natural gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920894509.3U CN210293344U (en) | 2019-06-13 | 2019-06-13 | Flow measuring device for submarine hydrocarbon natural gas |
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| CN210293344U true CN210293344U (en) | 2020-04-10 |
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| CN201920894509.3U Active CN210293344U (en) | 2019-06-13 | 2019-06-13 | Flow measuring device for submarine hydrocarbon natural gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319896A (en) * | 2019-06-13 | 2019-10-11 | 中国科学院南海海洋研究所 | Subsea hydrocarbon class natural gas flow measurement device, system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319896A (en) * | 2019-06-13 | 2019-10-11 | 中国科学院南海海洋研究所 | Subsea hydrocarbon class natural gas flow measurement device, system and method |
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