CN105571675B - A kind of gas pipeline safety monitoring system and its monitoring method - Google Patents
A kind of gas pipeline safety monitoring system and its monitoring method Download PDFInfo
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- CN105571675B CN105571675B CN201510909316.7A CN201510909316A CN105571675B CN 105571675 B CN105571675 B CN 105571675B CN 201510909316 A CN201510909316 A CN 201510909316A CN 105571675 B CN105571675 B CN 105571675B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention mainly relates to a kind of gas pipeline safety monitoring system and its monitoring methods.A kind of gas pipeline safety monitoring system, comprising: gas sensor is installed in gas pipeline, for detecting gas concentration in gas pipeline, generates gas concentration signal；Gas pressure sensor is installed on the leakage point of gas pipeline, for detecting the pressure variety of gas at leakage point, generates gas pressure signal；Acoustical generator is arranged on the tube wall of gas pipeline side, for emitting sound wave to tube wall；The tube wall of the pipeline other side is equipped with audio detection device；Communication device is transmitted to monitoring center for receiving real gas concentration signal, actual gas pressure signal and actual audio signal, and by above three signal.For the present invention without changing existing pipeline structure, no medium leakage risk does not influence the operations such as pipeline pigging.
Description
Technical field
A kind of system for relating generally to measure liquid level in closed container the invention belongs to level gauging field and side
Method more particularly to a kind of gas pipeline safety monitoring system and its monitoring method.
Background technique
Natural gas line can generate hydrops under certain condition, and hydrops occupies a part of pipeline section, reduces gas
Effectively conveying sectional area causes the defeated efficiency of pipe to reduce, it is also possible to will form hydrate under the conditions of certain temperature, causes ice stifled
Accident.For the gas gathering line of high sulfur-bearing and carbon dioxide, the presence of hydrops can also accelerate pipeline corrosion, pipeline is caused to wear
Hole causes leakage, even results in intoxication accident.Regular pigging is the effective and method generallyd use for reducing hydrops in pipe, and
Determine scraper-running frequency and formulate pigging scheme, need to know hydrops in pipe number, that is, need to measure pipe inner product liquid measure.
Chinese invention patent CN1155809C discloses a kind of using gamma ray measurement pipeline hydrops amount technology.Ray
Method is disadvantageous in that: ray is decayed acutely in steel tube wall, is needed to pipeline aperture to arrange radiographic source storehouse, cannot be right
The gathering line hydrops amount built up carries out non-intervention type detection, in addition, there is also radiation risks for such method.
Ultrasonic wave is widely used in the detection of the closed vessel liquid levels such as storage tank, the work of conventional ultrasound liquid level level measuring method
Principle is issued ultrasonic wave by ultrasonic wave transmitting probe, is propagated in the medium using time difference method, is encountered anti-after gas-liquid interface
It penetrates, reflection echo is received by receiving transducer.Its propagation is calculated using ultrasonic wave propagation time in the medium and ultrasonic velocity
Distance, to obtain liquid level.When in container temperature, pressure change or container in liquid phase media components change when,
The velocity of sound will also change, it is difficult to ensure that liquid level measurement precision.
Chinese invention patent 100434906C discloses a kind of formal ultrasonic wave liquid level measuring apparatus of self-correcting, to carry out the velocity of sound
Correction needs to install a fixation reflex ring inside tested container, not non-invasive measurement method truly.
Natural gas line pressure is high, pumped (conveying) medium is inflammable and explosive, and there are also severe toxicity for high sulfur-containing natural gas, to guarantee safety, Du
Exhausted dielectric leakage hidden danger, it is desirable that the hydrops measurement method of use cannot change existing pipeline architecture, can only carry out in pipe outer wall non-
Invasive measurement.
In conclusion existing pipeline hydrops measuring technique, usually invasive measurement method, needs to carry out existing pipeline
Transformation is unable to satisfy the needs for the natural gas line hydrops detection being currently running.
Summary of the invention
In view of the above-mentioned drawbacks of the prior art and insufficient, it is an object of the invention to propose a kind of non-intervention type pipeline
Hydrops monitors system and method, is not necessarily to speed of sound correction, is not influenced by gas-liquid phase component in pipeline and temperature, pressure and other parameters,
And do not change existing pipeline structure, the rapid survey to hydrops height in pipe can be realized.
In order to achieve the above technical purposes, the present invention is using technical solution in detail below:
A kind of gas pipeline safety monitoring system, comprising:
Gas sensor is installed in gas pipeline, for detecting gas concentration in gas pipeline, generates gas concentration letter
Number；
Gas pressure sensor is installed on the leakage point of gas pipeline, and the pressure for detecting gas at leakage point becomes
Change amount generates gas pressure signal；
Further include:
Acoustical generator is arranged on the tube wall of gas pipeline side, for emitting sound wave to tube wall；The tube wall of the pipeline other side
It is equipped with audio detection device, the audio detection device is used to receive the sound that the acoustical generator issues and is translated into sound
Frequency signal；
Communication device for receiving gas concentration signal, gas pressure signal and audio signal, and gas concentration is believed
Number, gas pressure signal and audio signal be transmitted to monitoring center；
Monitoring center, the monitoring center is interior to have gas concentration signal preset value, gas pressure signal preset value and sound
Frequency signal preset value；
Monitoring center obtains gas concentration signal, gas pressure signal and the audio signal that communication device is sent；
Gas concentration signal and gas concentration preset value are compared；
Gas pressure signal is compared with gas pressure signal preset value；
Audio signal is compared with audio preset value；
When judging the gas concentration signal and gas concentration preset value is inconsistent or audio signal and audio preset value
Inconsistent or actual pressure signal and gas pressure signal preset value are inconsistent, then issue alarm.
The acoustical generator is arranged on the corresponding pipeline outer wall in low-lying place for generating hydrops in gas pipeline.
The acoustical generator is fixed frequency acoustical generator.
It further include blimp, the blimp is annular, is socketed in the outside of the gas pipeline, and cover the sounding
Device and audio detection device.
Sealant is equipped between the blimp and gas pipeline tube wall.
The sealant is epoxy resin sealant or electric insulating sealant.
A kind of gas pipeline safety monitoring method is detected using the gas pipeline safety monitoring system；The party
Method includes the following steps:
Step 1: stored in monitoring center in advance and be arranged gas concentration monitoring information table, gas pressure information table with
And the audio-frequency information table that the audio detection device detects；
Record has gas concentration preset value in the gas concentration monitoring information table；
Record has gas pressure preset value in the gas pressure information table；
Record has the audio detection device when gas pipeline inner product liquid measure allows maximum value to detect in the audio-frequency information table
The audio preset value arrived；
Step 2: monitoring center obtains gas concentration signal, gas pressure signal and the audio signal that communication device is sent,
The gas concentration preset value recorded in gas concentration signal and gas concentration monitoring information table is compared；
Gas pressure signal is compared with gas pressure preset value；
The audio preset value recorded in audio signal and audio-frequency information table is compared；
When judging the gas concentration signal and gas concentration preset value is inconsistent or actual pressure signal and gas pressure
Force signal preset value is inconsistent or audio signal and audio preset value it is inconsistent, then issue alarm.
Further include hygrometer, the hygrometer periodically monitor in pipeline humidity and generate moisture signal pass to it is described
Communication device.
The present invention has a characteristic that compared with the domestic and international prior art
(1) it is non-intervention type hydrops measurement method, is not necessarily to the aperture on tube wall, line strength will not be damaged, nothing
Risk of leakage is especially suitable for conveying corrosivity, the monitoring of toxic medium pipeline inner product liquid；
(2) it is not influenced by the composition of gas-liquid phase medium in pipeline and temperature, pressure and other parameters, without carrying out the velocity of sound
Correction；
(3) energy needed for is small, will not cause safety problem, and explosion-proof performance is good；
(4) movement-less part, no pressure loss, maintenance cost are low；
(5) normal operations such as pipeline pigging are not influenced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of gas pipeline safety monitoring system of the present invention；
Wherein, 1 is appendix；2 be acoustical generator；3 be audio detection device；4 be communication device；5 be monitoring center；6 are
Blimp.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance or the quantity for implicitly indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be bright
Show or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple " contain
Justice is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；
It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
Embodiment 1
A kind of gas pipeline safety monitoring system, comprising:
Gas concentration sensor is installed in gas pipeline, and for detecting gas concentration in gas pipeline, it is dense to generate gas
Spend signal；
Gas pressure sensor is installed on the leakage point of gas pipeline, and the pressure for detecting gas at leakage point becomes
Change amount generates gas pressure signal；
Further include:
Acoustical generator is arranged on the tube wall of gas pipeline side, for emitting sound wave to tube wall；The tube wall of the pipeline other side
It is equipped with audio detection device, the audio detection device is used to receive the sound that the acoustical generator issues and is translated into sound
Frequency signal；
Communication device, for receiving gas concentration signal, gas pressure signal and audio signal, and by above three signal
It is transmitted to monitoring center；
Monitoring center, the monitoring center is interior to have gas concentration signal preset value, gas pressure signal preset value and sound
Frequency signal preset value；
Monitoring center obtains gas concentration signal, gas pressure signal and the audio signal that communication device is sent；
Gas concentration signal and gas concentration preset value are compared；
Gas pressure signal is compared with gas pressure signal preset value；
Audio signal is compared with audio preset value；
When judging the gas concentration signal and gas concentration preset value is inconsistent or audio signal and audio preset value
Inconsistent or actual pressure signal and gas pressure signal preset value are inconsistent, then issue alarm.
As the further preferred scheme of the present embodiment, the acoustical generator, which is arranged in gas pipeline, generates the low-lying of hydrops
On the corresponding pipeline outer wall in place.
The acoustical generator is fixed frequency acoustical generator.
A kind of monitoring method of the gas pipeline safety monitoring system, using the gas pipeline safety monitoring system
It is monitored；This method comprises the following steps:
A kind of gas pipeline safety monitoring method is detected using the gas pipeline safety monitoring system；The party
Method includes the following steps:
Step 1: stored in monitoring center in advance and be arranged gas concentration monitoring information table, gas pressure information table with
And the audio-frequency information table that the audio detection device detects；
Record has gas concentration preset value in the gas concentration monitoring information table；
Record has gas pressure preset value in the gas pressure information table；
Record has the audio detection device when gas pipeline inner product liquid measure allows maximum value to detect in the audio-frequency information table
The audio preset value arrived；
Step 2: monitoring center obtains gas concentration signal, gas pressure signal and the audio signal that communication device is sent,
The gas concentration preset value recorded in gas concentration signal and gas concentration monitoring information table is compared；
Gas pressure signal is compared with gas pressure preset value；
The audio preset value recorded in audio signal and audio-frequency information table is compared；
When judging the gas concentration signal and gas concentration preset value is inconsistent or actual pressure signal and gas pressure
Force signal preset value is inconsistent or audio signal and audio preset value it is inconsistent, then issue alarm.
Embodiment 2
The present embodiment increased for embodiment it is appropriate based on, the hygrometer periodically monitors humidity in pipeline
And generate moisture signal and pass to the communication device, signal is being passed to monitoring center by communication device, pre- in monitoring center
Humidity maximum value equipped with permission, when the appropriate signal that hygrometer detects is more than the humidity maximum value, monitoring center is issued
Alarm.
Embodiment 3
The present embodiment further includes blimp relative to both of the aforesaid embodiment, and the blimp is annular, is socketed in described
The outside of gas pipeline, and cover the acoustical generator and audio detection device.
A blimp is arranged in external in the gas pipeline equipped with acoustical generator and audio detection device, which will be outer
The isolation of portion's noise, so that audio detection device audio signal detected is more accurate, is not interfered by external noises.
Claims (8)
1. a kind of gas pipeline safety monitoring system, comprising:
Gas sensor is installed in gas pipeline, for detecting gas concentration in gas pipeline, generates gas concentration signal；
Gas pressure sensor is installed on the leakage point of gas pipeline, for detecting the pressure variety of gas at leakage point,
Generate gas pressure signal；
It is characterized by further comprising:
Acoustical generator is arranged on the tube wall of gas pipeline side, for emitting sound wave to tube wall；It is set on the tube wall of the pipeline other side
There is audio detection device, the audio detection device is used to receive the sound that the acoustical generator issues and is translated into audio letter
Number；
Communication device, for receiving gas concentration signal, gas pressure signal and audio signal, and by gas concentration signal, gas
Body pressure signal and audio signal are transmitted to monitoring center；
Monitoring center, the monitoring center is interior to have gas concentration signal preset value, gas pressure signal preset value and audio letter
Number preset value；
Monitoring center obtains gas concentration signal, gas pressure signal and the audio signal that communication device is sent；
Gas concentration signal and gas concentration preset value are compared；
Gas pressure signal is compared with gas pressure signal preset value；
Audio signal is compared with audio preset value；
When judging that the inconsistent gas concentration signal and gas concentration preset value or audio signal and audio preset value are different
Cause or actual pressure signal and gas pressure signal preset value are inconsistent, then issue alarm.
2. gas pipeline safety monitoring system according to claim 1, which is characterized in that the acoustical generator is arranged in gas transmission
On the corresponding pipeline outer wall in low-lying place for generating hydrops in pipeline.
3. gas pipeline safety monitoring system according to claim 1, which is characterized in that the acoustical generator is fixed frequency
Acoustical generator.
4. gas pipeline safety monitoring system according to claim 1, which is characterized in that further include blimp, it is described every
Sound cover is annular, is socketed in the outside of the gas pipeline, and cover the acoustical generator and audio detection device.
5. gas pipeline safety monitoring system according to claim 4, which is characterized in that the blimp and gas pipeline
Sealant is equipped between tube wall.
6. gas pipeline safety monitoring system according to claim 5, which is characterized in that the sealant is epoxy resin
Sealant or electric insulating sealant.
7. a kind of gas pipeline safety monitoring method, which is characterized in that using the gas pipeline safety as described in claim 1
Monitoring system is detected；This method comprises the following steps:
Step 1: being stored in monitoring center in advance and gas concentration monitoring information table, gas pressure information table and institute being arranged
State the audio-frequency information table that audio detection device detects；
Record has gas concentration preset value in the gas concentration monitoring information table；
Record has gas pressure preset value in the gas pressure information table；
Record has the audio detection device when gas pipeline inner product liquid measure allows maximum value to detect in the audio-frequency information table
Audio preset value；
Step 2: monitoring center obtains gas concentration signal, gas pressure signal and the audio signal that communication device is sent, by gas
The gas concentration preset value recorded in bulk concentration signal and gas concentration monitoring information table compares；
Gas pressure signal is compared with gas pressure preset value；
The audio preset value recorded in audio signal and audio-frequency information table is compared；
When judging the gas concentration signal and gas concentration preset value is inconsistent or actual pressure signal and gas pressure are believed
Number preset value is inconsistent or audio signal and audio preset value it is inconsistent, then issue alarm.
8. gas pipeline safety monitoring method according to claim 7, which is characterized in that it further include hygrometer, it is described wet
Degree meter periodically monitors humidity in pipeline and generates moisture signal and pass to the communication device.
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| CN105865531A (en) * | 2016-06-06 | 2016-08-17 | 无锡市翱宇特新科技发展有限公司 | Pipeline flow monitoring system |
| CN109596180B (en) * | 2019-01-22 | 2021-05-04 | 中国石油大学(华东) | Experimental device and method for leakage diffusion and overflow diffusion combustion of underwater gas transmission pipeline |
| CN113090958A (en) * | 2021-03-12 | 2021-07-09 | 西南石油大学 | Gas pipeline safety prevention and control monitoring method |
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