CN220525251U - Detection system for high-pressure gas leakage in long and narrow limited space - Google Patents
Detection system for high-pressure gas leakage in long and narrow limited space Download PDFInfo
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- CN220525251U CN220525251U CN202322013728.5U CN202322013728U CN220525251U CN 220525251 U CN220525251 U CN 220525251U CN 202322013728 U CN202322013728 U CN 202322013728U CN 220525251 U CN220525251 U CN 220525251U
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- 238000001514 detection method Methods 0.000 title claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims abstract description 39
- 238000010248 power generation Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 4
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 5
- 238000009423 ventilation Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 73
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 238000000034 method Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a detection system for high-pressure gas leakage in a long and narrow limited space, which comprises data transmission equipment, detection equipment, an alarm and a plurality of flow meters, wherein the flow meters are respectively arranged at the inner side and the outer side of outlets at two ends of the long and narrow limited space and are electrically connected with the data transmission equipment, the data transmission equipment is electrically connected with the detection equipment, and the detection equipment is electrically connected with the alarm. The utility model does not adopt gas concentration sensors of various principles to detect leakage gas, can detect whether leakage occurs in a narrow and long limited space only by adopting a flowmeter to detect a tunnel ventilation opening and flow field changes occurring in a tunnel, does not depend on detection of a specific gas concentration detection sensor, has no specific limitation on the types of leakage gas, has novel leakage detection principles, has rapid response time, is not influenced by diffusion process of the leakage gas, and is easy to realize.
Description
Technical Field
The utility model relates to the technical field of high-pressure gas leakage detection in a long and narrow limited space, in particular to a detection system for high-pressure gas leakage in a long and narrow limited space.
Background
High-pressure gas is stored and conveyed in a narrow and long limited space, such as various high-pressure natural gas, nitrogen, oxygen and other gas cylinders possibly stored in civil air defense works, and leakage of high-pressure gas, carbon dioxide and other high-pressure gas in underground strata possibly occurs in underground mines, such as coal mines; in the aspect of gas conveying, in a pipe network for long-distance gas conveying, long-distance conveying of a large amount of gas is commonly carried out by adopting a high-pressure pipeline, and a long and narrow limited space is inevitably formed in the conveying process: when a typical scene such as a gas pipeline passes through a mountain, a tunnel passing mode is usually adopted; the urban underground pipe gallery also belongs to a plurality of high-pressure gas pipelines and the like which are arranged in a long and narrow limited space. With the longer and longer use time of gas transmission pipelines, pipeline leakage accidents increase year by year, and under the specific environment conditions of the long and narrow limited space, if high-pressure gas leaks, the leakage condition is not easy to be found in time due to no people, underground or long and narrow space, so that accidents are caused, the loss is huge, and a great hidden danger is formed for the safety of the limited space.
The general principles and methods related to gas leak detection are as follows:
1. leakage gas detection device, leakage gas inspection instrument: for gas leakage detection of different types, a gas concentration detection method is generally adopted, various specific gas concentration sensors are adopted for detection, such as an oxygen concentration sensor, a carbon dioxide concentration sensor, a hydrogen sulfide concentration sensor, various electrochemical methane concentration sensors, an infrared methane sensor, a thermal conductivity methane concentration sensor, a laser methane detector and the like, the gas leakage detection device of the sensor can detect the concentration of the leaked gas at the sensor position to judge the gas leakage, and the gas concentration monitoring measuring point is difficult to determine in advance due to the randomness of the gas leakage accident leakage point of the long-distance gas transmission pipeline.
2. For gas pipelines, the leakage of the gas pipeline is monitored through pipeline pressure and flow detection: the detection method is easy to find for large leakage (such as fracture, large-hole leakage and the like), but is difficult to find through pipeline pressure and flow detection due to small compressibility of gas and small pressure and flow change of a high-pressure gas transmission pipeline for small leakage (such as small-hole leakage, micro leakage and the like), and has low detection sensitivity.
3. The conventional leak detection device relies on detecting the concentration of the leaked gas to determine whether the gas is leaked, and is usually self-assembled into a complete detection system for specific gas, and does not need to be combined with specific environmental conditions of a long and narrow limited space to be detected.
There are few methods for detecting high-pressure gas leakage in a specific narrow and long limited space, and a plurality of specific gas alarms or a plurality of specific gas sensors are usually adopted, or a plurality of specific gas detectors are arranged in a narrow and long limited space (such as a tunnel) for detecting leakage. In practical application, due to the longer length of the tunnel and the randomness of the leakage position of the high-pressure gas in the tunnel, when the method is adopted for detection, a plurality of sensors distributed in the tunnel are required to be adopted for detection, and the occurrence of the high-pressure gas leakage can be detected only when the gas needing to be leaked is diffused to the positions of the fixedly arranged sensors. The detection cannot be performed in time, the lag time of the detection signal is changed along with the relative distance between the position of the leakage point and the arrangement position of the sensor, the response time of the sensor and the response time of the detection system, and the greater uncertainty exists, so that the engineering application is inconvenient.
Disclosure of Invention
The utility model aims to provide a detection system for high-pressure gas leakage in a long and narrow limited space, so as to solve the technical problem of how to rapidly detect whether leakage occurs in the long and narrow limited space.
The aim of the utility model is achieved by the following technical means: the utility model provides a detection system that high-pressure gas leaked in long and narrow limited space, includes data transmission equipment, check out test set, alarm and a plurality of flowmeter, a plurality of flowmeter set up respectively in the inside and outside both sides of long and narrow limited space both ends export, all are connected with data transmission equipment electricity, data transmission equipment is connected with the check out test set electricity, the check out test set is connected with the alarm electricity.
Further, the device also comprises a power supply device, wherein the power supply device is electrically connected with the flowmeter and the data transmission device respectively.
Further, the power supply unit comprises a solar power supply device and/or a wind power generation device and/or a cable power supply device, the energy storage unit comprises a battery pack, the solar power supply device and/or the wind power generation device and/or the cable power supply device are respectively connected with the battery pack, and the battery pack is used for respectively providing electric energy for the flowmeter and the data transmission device.
Further, the flow meter adopts a gas flow meter, and the flow meter has at least four flow meters.
Further, the flowmeter comprises a first flowmeter, a second flowmeter, a third flowmeter and a fourth flowmeter, wherein the first flowmeter and the second flowmeter are respectively arranged on the inner side and the outer side of the outlet at one end of the long and narrow limited space, and the third flowmeter and the fourth flowmeter are respectively arranged on the inner side and the outer side of the outlet at the other end of the long and narrow limited space.
Further, the data transmission device uploads the data acquired by the flowmeter to the detection device in a wired or wireless data transmission mode.
Further, the data transmission device adopts an RS232 interface or an RS422 interface or an RS485 interface to transmit data.
Further, the data transmission device adopts Zigbee, GPRS or LoRa to transmit data.
Further, the detection device is a computer.
Further, the alarm is an audible and visual alarm.
The beneficial effects of the utility model include: the utility model does not adopt the gas concentration sensor of various principles to detect the leaked gas, the detection principle is irrelevant to the type of the leaked gas, the detection principle is irrelevant to whether the leaked gas has combustibility, the leakage in the narrow and long limited space can be detected by only adopting the flowmeter to detect the tunnel ventilation opening and the flow field change generated in the tunnel, the detection of the specific gas concentration detection sensor is not relied on, the type of the leaked gas is not particularly limited, the leakage detection principle is novel, the response time is not influenced by the diffusion process of the leaked gas, the response is rapid, and the realization is easy.
The application scene of the utility model comprises: high-pressure gas cylinders stored in underground civil air defense spaces, high-pressure gas leakage in underground mines, long and narrow limited spaces such as mountain tunnels laid by high-pressure gas transmission pipelines, urban underground pipe galleries and the like.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the present utility model;
FIG. 2 is a schematic diagram of a power supply apparatus;
FIG. 3 is a schematic view of a flowmeter mounting structure;
in the figure, 1-long and narrow limited space, 2-first flowmeter, 3-second flowmeter, 4-third flowmeter and 5-fourth flowmeter.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
Referring to fig. 1, 2 and 3, the detection system for high-pressure gas leakage in a long and narrow limited space comprises a data transmission device, a detection device, an alarm and a plurality of flowmeters, wherein the flowmeters are respectively arranged on the inner side and the outer side of outlets at two ends of the long and narrow limited space 1 and are electrically connected with the data transmission device, the data transmission device is electrically connected with the detection device, the detection device is electrically connected with the alarm, and the detection system further comprises a power supply device, and the power supply device is respectively electrically connected with the flowmeters and the data transmission device.
In this embodiment, the power supply unit includes a solar power supply unit, a wind power generation unit, and a cable power supply unit, the energy storage unit includes a battery pack, and the solar power supply unit, the wind power generation unit, and the cable power supply unit are respectively connected with the battery pack, charge the battery pack, and respectively provide electric energy for the flowmeter and the data transmission device through the battery pack. The solar power supply equipment and the wind power generation equipment are used for supplying power to the whole system, so that the system can be used everywhere, can supply power nearby, does not need to be transported for a long distance, avoids the loss of a long-distance power transmission line, has lower operation cost and simple maintenance, and is particularly suitable for being used under the unattended condition; the cable power supply equipment can avoid the problem that when the solar power supply equipment and the wind power generation equipment are insufficient in power supply, the whole system is lack of power, and then the high-pressure gas leakage detection in the long and narrow limited space 1 is affected. It is conceivable that in other embodiments, the whole system can be powered by only a solar power supply device or a wind power generation device or a cable power supply device, which is set according to the situation of the site.
In this embodiment, the flow meter adopts a gas flow meter, and includes a first flow meter 2, a second flow meter 3, a third flow meter 4 and a fourth flow meter 5, where the first flow meter 2 and the second flow meter 3 are respectively disposed on the inner and outer sides of the outlet at one end of the elongated limited space 1, and the third flow meter 4 and the fourth flow meter 5 are respectively disposed on the inner and outer sides of the outlet at the other end of the elongated limited space 1.
In this embodiment, the data transmission device uses a wired data transmission mode to upload the data collected by the flowmeter to the detection device, and specifically uses an RS485 interface to transmit the data (an RS232 interface or an RS422 interface). It is contemplated that in other embodiments, the data transmission device may also upload the data collected by the flow meter to the detection device by wireless data transmission, such as Zigbee, GPRS, or LoRa. Further, the detection device is a computer, the alarm is an audible and visual alarm, and when the computer detects that the long and narrow limited space 1 leaks, the audible and visual alarm is controlled to send out alarm sound and alarm light, so that emergency personnel are reminded to make corresponding.
The principle of the utility model is as follows: the high-pressure gas leakage occurs in the long and narrow limited space, the flow field of the gas in the limited space is obviously changed due to the rapid expansion of the leaked high-pressure gas, particularly the change at the outlet of the long and narrow limited space is quite obvious, and whether the high-pressure gas stored and conveyed in the long and narrow limited space is leaked can be calculated and judged according to the detection data of the flowmeter arranged at the outlet. The specific principle is as follows:
the following uses the high-pressure hydrogen-doped pipeline as an example to illustrate the technical principle of the positioning detection method of the high-pressure gas leakage in the narrow and long limited space:
the pressure of the conveying gas of the long-distance natural gas conveying pipeline is generally higher, the conveying pressure is generally 8-10 MPa, and the natural gas in the pipeline is in a highly compressed state; the utility model aims at detecting the leakage of the small hole, and overcomes the defects that the sensitivity of detecting the leakage of the small hole by using a pressure and flow method is not high and the leakage position is difficult to determine.
Assuming that a certain high-pressure hydrogen-doped pipeline passes through a certain mountain tunnel, the tunnel length is 6km, and the section area of the tunnel is 8m 2 The tunnel port is closed, and the closed surface is provided with 0.147m with the area of 0.7m multiplied by 0.21m 2 The pressure of the natural gas is 8MPa, the inner diameter of the gas pipeline is 976mm, and the leakage hole is assumed to be positioned at the midpoint of the tunnel. The leakage amount of the hydrogen-doped high-pressure pipeline under the condition is 4.2m 3 And/s, the leaked mixed gas expands rapidly in the tunnel to become low-pressure gas with the pressure close to atmospheric pressure, the leaked gas occupies a long and narrow limited space to replace air in the original space, the leaked mixed gas pushes the original air in the tunnel to escape from the two tunnel ventilation holes, the leakage amount is converted into the tunnel ventilation holes, and according to the mass conservation principle, as the leakage point is positioned at the midpoint of the tunnel, the two ends of the leakage point have the same escape air flow, and the leakage amount is as follows:
the air flow rate of the escaping air is: />
By adopting the flowmeter, the gas escaping from the ventilation opening in the above calculation example can be timely detected, the remote transmission of the wind speed and wind direction data to the monitoring computer can be realized by matching with the data transmission equipment, and the computer can judge that the mixed gas leakage occurs in the pipeline in the tunnel, so that the leakage of the high-pressure hydrogen-doped pipeline in the tunnel can be rapidly detected.
The specific judging method of the computer comprises the following steps: when no wind or wind exists on two sides outside the outlet of the long and narrow limited space but is not poured into the long and narrow limited space, namely: v i >v fi Then, the leakage is judged to occur, wherein v i Is the movement speed of the gas in the narrow and long limited space; v fi Is the movement speed of the gas outside the narrow and long limited space. When wind is filled into one side of the long and narrow limited space, namely: v f1 >v f2 Or v f2 >v f1 Then, the leakage is judged to occur, wherein v f1 Is the movement speed of the gas outside the outlet on one side of the narrow and long limited space, v f2 Is the movement speed of the gas outside the outlet on the other side of the narrow and long limited space.
It should be noted that the terms "coupled," "configured," and "arranged" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, features defining "connected", "arranged" may explicitly or implicitly include one or more such features. Moreover, the terms "connected," "configured," and the like are used to distinguish between similar objects and do not necessarily describe a particular order or sequence. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. And for the foregoing embodiments, for simplicity of explanation, the same is shown as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently in accordance with the application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts referred to are not necessarily required for the present application.
In the above embodiments, the basic principle and main features of the present utility model and advantages of the present utility model are described. It will be appreciated by persons skilled in the art that the present utility model is not limited by the foregoing embodiments, but rather is shown and described in what is considered to be illustrative of the principles of the utility model, and that modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the utility model, and therefore, is within the scope of the appended claims.
Claims (10)
1. The utility model provides a detection system that high-pressure gas leaked in long and narrow limited space, its characterized in that includes data transmission equipment, check out test set, alarm and a plurality of flowmeter, a plurality of flowmeter set up respectively in the inside and outside both sides of long and narrow limited space (1) both ends export, all are connected with data transmission equipment electricity, data transmission equipment is connected with the check out test set electricity, the check out test set is connected with the alarm electricity.
2. A system for detecting a leak of high pressure gas in an elongated confined space as claimed in claim 1 further comprising power supply means electrically connected to the flow meter and the data transmission means, respectively.
3. A system for detecting leakage of high pressure gas in an elongated confined space according to claim 2, wherein the power supply unit comprises a solar power supply unit and/or a wind power generation unit and/or a cable power supply unit, and wherein the energy storage unit comprises a battery pack, and wherein the solar power supply unit and/or the wind power generation unit and/or the cable power supply unit are respectively connected with the battery pack, and are respectively used for supplying electric energy to the flowmeter and the data transmission unit through the battery pack.
4. A system for detecting high pressure gas leakage in an elongated confined space according to claim 1, wherein said flow meter is a gas flow meter, said flow meter being at least four.
5. A system for detecting leakage of high pressure gas in an elongated confined space according to claim 4, wherein said flow meter comprises a first flow meter (2), a second flow meter (3), a third flow meter (4) and a fourth flow meter (5), said first flow meter (2) and said second flow meter (3) are respectively arranged on the inner and outer sides of an outlet at one end of the elongated confined space (1), and said third flow meter (4) and said fourth flow meter (5) are respectively arranged on the inner and outer sides of an outlet at the other end of the elongated confined space (1).
6. A system for detecting high pressure gas leakage in an elongated confined space according to claim 1 wherein said data transmission means uploads data collected by the flow meter to the detection means by wired or wireless data transmission.
7. A system for detecting high pressure gas leakage in a confined space as in claim 6 wherein said data transmission means employs an RS232 interface or an RS422 interface or an RS485 interface for data transmission.
8. A system for detecting high pressure gas leakage in an elongated confined space according to claim 6 wherein said data transmission means employs Zigbee or GPRS or LoRa for data transmission.
9. A system for detecting high pressure gas leakage in an elongated confined space according to claim 1, wherein said detecting means is a computer.
10. A system for detecting high pressure gas leakage in an elongated confined space according to claim 1 wherein said alarm is an audible and visual alarm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322013728.5U CN220525251U (en) | 2023-07-28 | 2023-07-28 | Detection system for high-pressure gas leakage in long and narrow limited space |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322013728.5U CN220525251U (en) | 2023-07-28 | 2023-07-28 | Detection system for high-pressure gas leakage in long and narrow limited space |
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| CN220525251U true CN220525251U (en) | 2024-02-23 |
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| CN202322013728.5U Active CN220525251U (en) | 2023-07-28 | 2023-07-28 | Detection system for high-pressure gas leakage in long and narrow limited space |
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- 2023-07-28 CN CN202322013728.5U patent/CN220525251U/en active Active
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