CN113958881A - Natural gas pipeline safety evaluation method, system and method - Google Patents
Natural gas pipeline safety evaluation method, system and method Download PDFInfo
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- CN113958881A CN113958881A CN202111238940.0A CN202111238940A CN113958881A CN 113958881 A CN113958881 A CN 113958881A CN 202111238940 A CN202111238940 A CN 202111238940A CN 113958881 A CN113958881 A CN 113958881A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 178
- 239000003345 natural gas Substances 0.000 title claims abstract description 89
- 238000011156 evaluation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 20
- 238000007789 sealing Methods 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The invention discloses a natural gas pipeline safety evaluation method and system, which comprises a box body, wherein an exhaust pipe and an air inlet pipe are respectively welded on two sides of the box body, the ends of the air inlet pipe and the exhaust pipe, which extend into the box body, are respectively connected with a corrugated pipe through flanges, one end of the corrugated pipe is respectively connected with a T-shaped sealing cylinder through a flange, a natural gas pipeline body is hermetically clamped between the two T-shaped sealing cylinders, a fastening mechanism is arranged between the two T-shaped sealing cylinders, a sealing cover is hinged to the top of the box body, a sealing locking assembly is arranged between the sealing cover and the box body, and a pressure testing mechanism is arranged between one side of the sealing cover and the air inlet pipe. According to the invention, the natural gas pipeline body is in a sealed environment, the pressure inside the natural gas pipeline body is increased by the air pump, the pressure inside the sealed box body is detected by the second pressure gauge, the indication number of the pressure inside the sealed box body is observed to be changed enough, and the safety evaluation treatment can be carried out on the natural gas pipeline.
Description
Technical Field
The invention relates to the technical field of natural gas pipelines, in particular to a method, a system and a method for evaluating the safety of a natural gas pipeline.
Background
The natural gas pipeline refers to a pipeline for conveying natural gas (including associated gas produced by an oil field) from a mining place or a processing plant to a city gas distribution center or an industrial enterprise user, and is also called a gas transmission pipeline. The natural gas pipeline is used for conveying natural gas, and is a way for conveying a large amount of natural gas on land. Natural gas pipelines account for about half of the total pipeline length in the world.
The natural gas pipeline transportation has the advantages of low transportation cost, small occupied area, quick construction, large oil and gas transportation amount, high safety performance, less transportation loss, no three-waste discharge, small leakage risk, small environmental pollution, small influence of severe weather, small equipment maintenance amount, convenient management, easy realization of remote centralized monitoring and the like.
The safety problem of the natural gas pipeline is one of the important problems of natural gas transportation, and when the pipeline is put into use, safety evaluation treatment is required, namely, quality detection treatment (safety pressure test treatment) is carried out on the natural gas pipeline so as to ensure the pressure resistance of the pipeline.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a method, a system and a method for evaluating the safety of a natural gas pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a natural gas line safety evaluation system, includes the box, blast pipe and intake pipe have been welded respectively to the both sides of box, and intake pipe and blast pipe extend into the box in one end all through flange joint have a bellows, and the one end of bellows all has the sealed section of thick bamboo of T type through flange joint, and sealed joint has the natural gas line body between two sealed sections of T type, is provided with fastening device between two sealed sections of T type, the top of box articulates there is sealed lid, and is provided with sealed locking subassembly between sealed lid and the box, is provided with the pressure testing mechanism between one side of sealed lid and the intake pipe, and one side of box is provided with alarm mechanism.
Preferably, the pressure test mechanism comprises an air pump connected to one side of the sealing cover through a bolt, an air inlet hose is connected between one side of the air pump and one end of the air inlet pipe through a flange, a first pressure gauge is arranged on one side of the air inlet pipe, and an electromagnetic valve is arranged on one side of the air outlet pipe.
Preferably, the alarm mechanism comprises a second pressure gauge connected to one side of the box body through a bolt, alarm equipment is arranged on one side of the second pressure gauge, and PLC equipment is arranged between the alarm equipment and the second pressure gauge.
Preferably, the fastening mechanism comprises a forward and reverse rotating motor connected to the inner wall of the bottom of the box body through a bolt, the output shaft of the forward and reverse rotating motor is connected with a gear through a bolt, a connecting plate is welded to one side of each of the two T-shaped sealing cylinders, a rack is welded to one side of each connecting plate, and one side of each rack is meshed with two sides of the gear respectively.
Preferably, a spring is connected between two ends of one side of the T-shaped sealing cylinder and the inner wall of the box body through bolts, and a sealing ring is bonded on one side of the T-shaped sealing cylinder.
A natural gas pipeline safety evaluation method comprises the following specific steps:
s1: pipe fastening process
The natural gas pipeline body is placed between the two T-shaped sealing cylinders, and is fastened through the T-shaped sealing cylinders and the sealing rings;
s2: setting up a sealed environment
In the process of fixing the pipeline, a seal ring, a corrugated pipe, an exhaust pipe and an air inlet pipe which are arranged on one side of a T-shaped seal cylinder are used for carrying out primary sealing treatment on the natural gas pipeline body, then the seal cover and the box body are closed, and a seal locking assembly is used for carrying out seal locking treatment on the box body and the seal cover, so that the natural gas pipeline body is in a sealed environment;
s3: safe pressure testing process
The method comprises the steps that a gas pump and a gas inlet hose are used for filling proper amount of gas into a gas inlet pipe and the interior of a natural gas pipeline body, the pressure intensity inside the natural gas pipeline body is increased, the pressure intensity readings inside the natural gas pipeline body are measured through a first pressure gauge, the pressure intensity inside the natural gas pipeline body is increased to Pa, and the readings of a second pressure gauge are observed after minutes to carry out safety pressure test operation;
s4: observe whether the air leakage problem occurs
Utilize the inside pressure of second manometer to detect sealed box, then can start alarm device through the sensor and carry out the alarm processing when the second manometer shows the reading, show that this natural gas line can appear leaking gas's problem, its security is not good. Recording the data; and when the second pressure gauge does not have the indication change, repeating the step S at least for the indication observation of the second pressure gauge, and if the second pressure gauge does not have the change all the time, the natural gas pipeline has no problem of gas leakage, has good safety, is stored and processed, and can be subjected to safety evaluation processing.
The invention has the beneficial effects that:
1. in the invention, a positive and negative rotating motor drives a gear to rotate, a connecting plate and a T-shaped sealing cylinder carried by two racks are driven to perform position adjustment treatment by utilizing the meshing action of the gear and the racks, the distance between the two T-shaped sealing cylinders is changed, a natural gas pipeline body is fastened by the T-shaped sealing cylinder and a sealing ring, in the process, the natural gas pipeline body is primarily sealed by the sealing ring, a corrugated pipe, an exhaust pipe and an air inlet pipe which are arranged on one side of the T-shaped sealing cylinder, then the sealing cover and a box body are closed, and the box body and the sealing cover are sealed and locked by a sealing locking assembly, so that the natural gas pipeline body is in a sealed environment;
2. in the invention, the air pump and the air inlet hose are used for filling proper amount of air into the air inlet pipe and the natural gas pipeline body, so that the pressure inside the natural gas pipeline body is increased, the pressure inside the natural gas pipeline body is measured by the first pressure measuring meter, the pressure inside the sealed box body is detected by the second pressure measuring meter, when the pressure inside the sealed box body is measured by the second pressure measuring meter, the alarm device is started by the sensor for alarm processing, the problem of air leakage of the natural gas pipeline is shown, and the safety is poor; when the second pressure measuring meter does not have the indication change, the problem of gas leakage of the natural gas pipeline is solved, the safety is good, the natural gas pipeline can be stored and processed, and the safety evaluation of the natural gas pipeline can be carried out.
Drawings
Fig. 1 is a schematic flow structure diagram of a method and a system for evaluating the safety of a natural gas pipeline according to the present invention;
fig. 2 is a schematic system structure diagram of a method and a system for evaluating the safety of a natural gas pipeline according to the present invention.
In the drawings: 1. a box body; 2. a T-shaped sealing cylinder; 3. a rack; 4. a gear; 5. an alarm device; 6. a second pressure gauge; 7. a bellows; 8. an exhaust pipe; 9. a spring; 10. a sealing cover; 11. a natural gas pipeline body; 12. an air pump; 13. an air intake hose; 14. an air inlet pipe; 15. a first pressure gauge.
Detailed Description
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-2, a natural gas pipeline safety evaluation system, including box 1, blast pipe 8 and intake pipe 14 have been welded respectively to the both sides of box 1, and intake pipe 14 and blast pipe 8 all have bellows 7 through flange joint to the one end that stretches into in the box 1, bellows 7's one end all has the sealed section of thick bamboo 2 of T type through flange joint, sealed joint has natural gas pipeline body 11 between two sealed sections of T type 2, be provided with fastening device between two sealed sections of T type 2, the top of box 1 articulates there is sealed lid 10, and be provided with sealed locking subassembly between sealed lid 10 and the box 1, be provided with the pressure testing mechanism between one side of sealed lid 10 and intake pipe 14, one side of box 1 is provided with alarm mechanism.
Further, the pressure testing mechanism includes an air pump 12 connected to one side of the sealing cover 10 through a bolt, an air inlet hose 13 is connected between one side of the air pump 12 and one end of an air inlet pipe 14 through a flange, a first pressure testing meter 15 is arranged on one side of the air inlet pipe 14, and an electromagnetic valve is arranged on one side of the air outlet pipe 8.
Further, alarm mechanism includes through bolted connection at the second pressure gage 6 of box 1 one side, and one side of second pressure gage 6 is provided with alarm device 5, is provided with PLC equipment between alarm device 5 and the second pressure gage 6.
Further, the fastening mechanism comprises a forward and reverse rotating motor which is connected to the inner wall of the bottom of the box body 1 through a bolt, an output shaft of the forward and reverse rotating motor is connected with a gear 4 through a bolt, a connecting plate is welded to one side of each of the two T-shaped sealing cylinders 2, a rack 3 is welded to one side of each connecting plate, and one side of each rack 3 is meshed with two sides of the gear 4 respectively.
Furthermore, springs 9 are connected between two ends of one side of the T-shaped sealing cylinder 2 and the inner wall of the box body 1 through bolts, and sealing rings are bonded on one side of the T-shaped sealing cylinder 2.
A natural gas pipeline safety evaluation method comprises the following specific steps:
s1: pipe fastening process
The gear 4 is driven to rotate by a positive and negative rotating motor, the connecting plates carried by the two racks 3 and the T-shaped sealing cylinders 2 are driven to carry out position adjustment treatment by utilizing the meshing action of the gear 4 and the racks 3, the natural gas pipeline body 11 is placed between the two T-shaped sealing cylinders 2, and the natural gas pipeline body 11 is fastened by the T-shaped sealing cylinders 2 and the sealing rings;
s2: setting up a sealed environment
In the process of pipeline fixing, a seal ring arranged on one side of a T-shaped seal cylinder 2, a corrugated pipe 7, an exhaust pipe 8 and an air inlet pipe 14 are used for carrying out primary sealing treatment on a natural gas pipeline body 11, then a seal cover 10 and a box body 1 are closed, and a seal locking assembly is used for carrying out seal locking treatment on the box body 1 and the seal cover 10, so that the natural gas pipeline body 11 is in a sealed environment;
s3: safe pressure testing process
The air pump 12 and the air inlet hose 13 are used for filling a proper amount of air into the air inlet pipe 14 and the natural gas pipeline body 11, increasing the pressure inside the natural gas pipeline body 11, measuring the pressure inside the natural gas pipeline body 11 through the first pressure measuring meter 15, increasing the pressure inside the natural gas pipeline body 11 from 0 to 3000Pa, and observing the indication of the second pressure measuring meter 6 after 10 minutes to perform safe pressure test operation;
s4: observe whether the air leakage problem occurs
Utilize second manometer 6 to detect the inside pressure of seal box 1, then can start alarm device 5 through the sensor and report to the police and handle when the second manometer 6 appears the registration, show that this natural gas line can appear the problem of gas leakage, its security is not good. Recording the data; and when the second pressure gauge 6 does not have the indication change, repeating the step S3 for at least 10 times to observe the indication of the second pressure gauge 6, and if the second pressure gauge 6 does not have the change all the time, the problem that the natural gas pipeline leaks gas is solved, so that the safety is good, the storage treatment is carried out on the natural gas pipeline, and the safety evaluation treatment can be carried out on the natural gas pipeline.
The working principle is as follows: when the device is used, a user drives the gear 4 to rotate through the forward and reverse rotating motor, the connecting plate carried by the two racks 3 and the T-shaped sealing barrel 2 are driven to perform position adjustment treatment by utilizing the meshing action of the gear 4 and the racks 3, the distance between the two T-shaped sealing barrels 2 is changed, the natural gas pipeline body 11 is fastened through the T-shaped sealing barrel 2 and the sealing ring, in the process, the sealing ring arranged on one side of the T-shaped sealing barrel 2, the corrugated pipe 7, the exhaust pipe 8 and the air inlet pipe 14 are utilized to perform primary sealing treatment on the natural gas pipeline body 11, then the sealing cover 10 and the box body 1 are closed, the box body 1 and the sealing cover 10 are sealed and locked through the sealing locking assembly, so that the natural gas pipeline body 11 is in a sealed environment, the air inlet pipe 14 and the natural gas pipeline body 11 are filled with a proper amount of gas through the air pump 12 and the air inlet hose 13, the pressure inside the natural gas pipeline body 11 is increased, the pressure inside the natural gas pipeline body 11 is measured through the first pressure gauge 15, the pressure inside the sealed box body 1 is detected through the second pressure gauge 6, when the second pressure gauge 6 shows the pressure, the alarm device 5 is started through the sensor to carry out alarm processing, the problem of gas leakage of the natural gas pipeline is shown, and the safety is poor; when the second pressure measuring meter 6 does not have the indication change, the problem of gas leakage of the natural gas pipeline is solved, the safety is good, the natural gas pipeline can be stored and processed, and the safety evaluation of the natural gas pipeline can be carried out.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A natural gas pipeline safety evaluation system comprises a box body (1) and is characterized in that, an exhaust pipe (8) and an air inlet pipe (14) are respectively welded on two sides of the box body (1), and one end of the air inlet pipe (14) and one end of the exhaust pipe (8) extending into the box body (1) are both connected with a corrugated pipe (7) through flanges, one end of the corrugated pipe (7) is both connected with T-shaped sealing cylinders (2) through flanges, a natural gas pipeline body (11) is hermetically clamped between the two T-shaped sealing cylinders (2), a fastening mechanism is arranged between the two T-shaped sealing cylinders (2), the top of the box body (1) is hinged with a sealing cover (10), and a sealing locking assembly is arranged between the sealing cover (10) and the box body (1), a pressure testing mechanism is arranged between one side of the sealing cover (10) and the air inlet pipe (14), and an alarm mechanism is arranged on one side of the box body (1).
2. The natural gas pipeline safety evaluation method and system according to claim 1, wherein the pressure test mechanism comprises an air pump (12) connected to one side of the sealing cover (10) through a bolt, an air inlet hose (13) is connected between one side of the air pump (12) and one end of an air inlet pipe (14) through a flange, a first pressure gauge (15) is arranged on one side of the air inlet pipe (14), and an electromagnetic valve is arranged on one side of the air outlet pipe (8).
3. The natural gas pipeline safety evaluation method and system according to claim 2, wherein the alarm mechanism comprises a second pressure gauge (6) which is connected to one side of the box body (1) through bolts, an alarm device (5) is arranged on one side of the second pressure gauge (6), and a PLC device is arranged between the alarm device (5) and the second pressure gauge (6).
4. The natural gas pipeline safety evaluation method and system according to claim 3, wherein the fastening mechanism comprises a forward and reverse rotating motor which is connected to the inner wall of the bottom of the box body (1) through bolts, the output shaft of the forward and reverse rotating motor is connected with a gear (4) through bolts, a connecting plate is welded on one side of each of the two T-shaped sealing cylinders (2), a rack (3) is welded on one side of each connecting plate, and one side of each rack (3) is meshed with two sides of the gear (4) respectively.
5. The natural gas pipeline safety evaluation method and system according to claim 4, wherein springs (9) are connected between two ends of one side of the T-shaped sealing cylinder (2) and the inner wall of the box body (1) through bolts, and sealing rings are bonded on one side of the T-shaped sealing cylinder (2).
6. The natural gas pipeline safety evaluation method according to claims 1 to 5, characterized by comprising the following specific steps:
s1: pipe fastening process
The gear 4 is driven to rotate by a positive and negative rotating motor, the connecting plates carried by the two racks 3 and the T-shaped sealing cylinders 2 are driven to carry out position adjustment treatment by utilizing the meshing action of the gear 4 and the racks 3, the natural gas pipeline body 11 is placed between the two T-shaped sealing cylinders 2, and the natural gas pipeline body 11 is fastened by the T-shaped sealing cylinders 2 and the sealing rings;
s2: setting up a sealed environment
In the process of pipeline fixing, a seal ring arranged on one side of a T-shaped seal cylinder 2, a corrugated pipe 7, an exhaust pipe 8 and an air inlet pipe 14 are used for carrying out primary sealing treatment on a natural gas pipeline body 11, then a seal cover 10 and a box body 1 are closed, and a seal locking assembly is used for carrying out seal locking treatment on the box body 1 and the seal cover 10, so that the natural gas pipeline body 11 is in a sealed environment;
s3: safe pressure testing process
The air pump 12 and the air inlet hose 13 are used for filling a proper amount of air into the air inlet pipe 14 and the natural gas pipeline body 11, increasing the pressure inside the natural gas pipeline body 11, measuring the pressure inside the natural gas pipeline body 11 through the first pressure measuring meter 15, increasing the pressure inside the natural gas pipeline body 11 from 0 to 3000Pa, and observing the indication of the second pressure measuring meter 6 after 10 minutes to perform safe pressure test operation;
s4: observe whether the air leakage problem occurs
Utilize second manometer 6 to detect the inside pressure of seal box 1, then can start alarm device 5 through the sensor and report to the police and handle when the second manometer 6 appears the registration, show that this natural gas line can appear the problem of gas leakage, its security is not good.
7. Recording the data; and when the second pressure gauge 6 does not have the indication change, repeating the step S3 for at least 10 times to observe the indication of the second pressure gauge 6, and if the second pressure gauge 6 does not have the change all the time, the problem that the natural gas pipeline leaks gas is solved, so that the safety is good, the storage treatment is carried out on the natural gas pipeline, and the safety evaluation treatment can be carried out on the natural gas pipeline.
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| CN202111238940.0A CN113958881A (en) | 2021-10-25 | 2021-10-25 | Natural gas pipeline safety evaluation method, system and method |
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| CN202111238940.0A CN113958881A (en) | 2021-10-25 | 2021-10-25 | Natural gas pipeline safety evaluation method, system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113346324A (en) * | 2021-07-13 | 2021-09-03 | 刘晓东 | A atmospheric pressure equipment for binding post |
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| CN213858668U (en) * | 2020-10-26 | 2021-08-03 | 青海盐湖机电装备技术有限公司 | Polishing equipment for machining production |
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2021
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|---|---|---|---|---|
| CN101984337A (en) * | 2010-10-27 | 2011-03-09 | 南京宝色股份公司 | Pipeline hydraulic test device |
| CN109268544A (en) * | 2018-11-19 | 2019-01-25 | 西安东新石油设备厂有限公司 | A kind of urgent cutting device of self-operated type pipeline and natural gas line observing and controlling security system |
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| CN113346324A (en) * | 2021-07-13 | 2021-09-03 | 刘晓东 | A atmospheric pressure equipment for binding post |
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