CN210532089U - Natural gas transmission pipeline gas leakage detection device - Google Patents
Natural gas transmission pipeline gas leakage detection device Download PDFInfo
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- CN210532089U CN210532089U CN201921566016.3U CN201921566016U CN210532089U CN 210532089 U CN210532089 U CN 210532089U CN 201921566016 U CN201921566016 U CN 201921566016U CN 210532089 U CN210532089 U CN 210532089U
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Abstract
The utility model relates to a natural gas transmission pipeline gas leakage detection device belongs to gas leakage detection device field, and its technical essential is: including setting up in the gas collection subassembly of two adjacent pipeline junctions, gas collection subassembly and pipeline sealing connection, one side of gas collection subassembly is equipped with the detection alarm, the gas collection subassembly is connected with the outlet duct that the gas outlet was towards the detection alarm. The utility model provides a natural gas conveying pipeline gas leakage detection device can collect the natural gas of leaking through setting up the gas collection subassembly, avoids the arbitrary diffusion of natural gas in the air, through setting up the outlet duct of being connected with the gas collection subassembly to make the gas outlet orientation of outlet duct detect the alarm, thereby improve the accuracy that detects the alarm.
Description
Technical Field
The utility model belongs to the technical field of the gas leakage detection device and specifically relates to a gas leakage detection device of natural gas transmission pipeline is related to.
Background
Natural gas, as a low-pollution fossil energy, is widely used in life and production of people under the current ecological environment requirement. The natural gas is mainly conveyed through a pipeline in the conveying process, the pipeline leakage phenomenon can occur at the connecting part between pipelines in the conveying process, the leaked natural gas can not only cause resource waste and environmental pollution, but also have potential safety hazards because the natural gas is combustible gas. Therefore, the natural gas pipe needs to be subjected to gas leakage detection so as to ensure safe transportation.
The existing gas leakage detection device is usually arranged on one side of a pipeline, natural gas is lighter than air, and is easy to disperse after leakage, so that inaccurate detection is easily caused under the influence of external wind direction and the like, and particularly, the gas leakage detection device is used for detecting a pipeline with a large pipe diameter.
Therefore, a new technical solution is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a natural gas conveying pipeline gas leakage detection device can collect the natural gas of leaking through setting up the gas collection subassembly, avoids the arbitrary diffusion of natural gas in the air, through setting up the outlet duct of being connected with the gas collection subassembly to make the gas outlet orientation of outlet duct detect the alarm, thereby improve the accuracy that detects the alarm.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the gas leakage detection device for the natural gas conveying pipeline comprises a gas collection assembly arranged at the joint of two adjacent pipelines, the gas collection assembly is connected with the pipelines in a sealing mode, a detection alarm is arranged on one side of the gas collection assembly, and the gas collection assembly is connected with a gas outlet pipe of which the direction faces the detection alarm.
Through adopting above-mentioned technical scheme, the junction through at two adjacent pipelines sets up the gas collection subassembly, when the junction of two adjacent pipelines takes place the natural gas and leaks, the gas collection subassembly is collected the natural gas of leakage, avoid the diffusion of natural gas in the air and influence the detection alarm and detect it, through setting up in the outlet duct of gas collection subassembly intercommunication, and make the gas outlet orientation of outlet duct detect the alarm, when the natural gas leaks, under the collection of gas collection subassembly, the natural gas of leakage can only escape from the gas outlet of outlet duct, thereby guarantee to detect accuracy and the timeliness that the alarm detected, improve and detect the precision.
The utility model discloses further set up to: the gas collecting assembly comprises a gas collecting hood and hoops, the gas collecting hood is arranged between two adjacent pipelines in a covering mode, the hoops are arranged at two ends of the gas collecting hood in a sealing mode, the cross sections of the hoops along the axis direction are in a convex shape, the diameter of one end, far away from the gas collecting hood, of each hoop is smaller than the diameter of one end, far away from the gas collecting hood, of each hoop, and one end, far away from the gas collecting hood, of each hoop is in contact with the outer wall.
Through adopting above-mentioned technical scheme, thereby make things convenient for the installation of gas collection subassembly on the pipeline through setting up staple bolt and gas collecting channel, through the shape that sets up the staple bolt for the gas collection subassembly can be suitable for the connected mode of more different pipelines.
The utility model discloses further set up to: the hoop comprises two hoop sheets fixedly connected through bolts and nuts and a sealing gasket arranged on the inner side of the hoop sheets.
Through adopting above-mentioned technical scheme, two hoop pieces pass through bolt and nut to be fixed to make things convenient for the staple bolt installation on the pipeline, through set up seal gasket in hoop piece, strengthen the leakproofness between staple bolt and the pipeline.
The utility model discloses further set up to: the detection alarm comprises:
the detection unit is used for detecting whether the gas discharged from the gas outlet of the gas outlet pipe contains natural gas or not and outputting a detection signal when the natural gas is detected to exist;
the control unit is coupled with the detection unit, receives and responds to the detection signal, and outputs a control signal when receiving the detection signal;
the alarm unit is coupled with the control unit, receives and responds to the control signal, and outputs an alarm signal when receiving the control signal; and
and the power supply is used for providing electric energy required by the work for the detection alarm.
By adopting the technical scheme, whether the natural gas leaks or not is detected by the detection unit, the detection signal is output according to the detection result, the control unit is arranged to receive the detection signal, the control signal is output according to the detection signal, the control signal controls the alarm unit, the alarm unit alarms when the natural gas leaks, and therefore the staff is prompted, and the leakage part is timely processed.
The utility model discloses further set up to: the detection unit comprises a detection resistor and a divider resistor which are connected between a power supply and the ground in series, and the input end of the control unit is coupled with a connection point between the detection resistor and the divider resistor.
By adopting the technical scheme, the voltage value obtained by the detection resistor and the divider resistor is changed by setting the detection resistor and the divider resistor and changing the resistance value of the detection resistor, so that the output of a detection signal is realized.
The utility model discloses further set up to: the detection resistor is an N-type gas-sensitive resistor.
By adopting the technical scheme, when the N-type gas-sensitive resistor detects natural gas, the resistance value of the N-type gas-sensitive resistor is reduced along with the increase of the gas concentration, so that the voltage value obtained by the divider resistor is increased, the output signal value between the divider resistor and the detection resistor is changed, and the output of a detection signal is realized.
The utility model discloses further set up to: the detection resistor is a sliding rheostat, the detection alarm is arranged above the gas collection assembly, the gas outlet pipe is vertically arranged, a gas plug is connected to the gas outlet of the gas outlet pipe in a sliding mode, when natural gas leaks, the gas plug slides towards one end far away from the gas collection assembly, the gas plug is connected with a sliding sheet of the sliding rheostat, and when the gas plug slides towards one end far away from the gas collection assembly, the resistance value of the sliding rheostat connected into a circuit is reduced.
By adopting the technical scheme, the detection resistor is a sliding rheostat through being arranged, the detection alarm is arranged above the gas collection assembly, the gas plug is arranged at the gas outlet of the gas outlet pipe, when natural gas leaks by the aid of the gas plug, the increase of the volume of the natural gas causes the increase of the air pressure in the gas collection cover, so that the gas plug slides towards the detection alarm, and the gas plug is connected with the sliding sheet of the sliding rheostat to drive the sliding sheet of the sliding rheostat to move, so that the resistance value of the sliding rheostat is reduced, the resistance value of the access circuit of the sliding rheostat is reduced, the voltage value obtained by the voltage dividing resistor is increased, the output signal value between the voltage dividing resistor and the detection resistor is changed, and the output of detection signals is realized.
The utility model discloses further set up to: the control unit comprises a control circuit, the control circuit comprises a triode, the base electrode of the triode is coupled with the output end of the detection unit, an excitation coil of a relay is connected between the collector electrode of the triode and a power supply in series, and the emitting electrode of the triode is grounded.
Through adopting above-mentioned technical scheme, through setting up control circuit, the base and the detecting element output of triode are coupled to realize that switching on of triode is controlled by detecting element's output, through the excitation coil that sets up the relay between the collecting electrode of triode and power, thereby when making the triode switch on, the excitation coil of relay circular telegram, thereby realize control signal's output.
The utility model discloses further set up to: the control unit further comprises a self-locking circuit, the self-locking circuit comprises first normally open contacts connected to two ends of the relay magnet exciting coil in parallel, and after the relay magnet exciting coil is electrified, the first normally open contacts are closed.
Through adopting above-mentioned technical scheme, through setting up self-locking circuit, after detecting element is triggered, can keep the excitation coil of relay to last the circular telegram through self-locking circuit to realize that the control unit lasts output control signal, avoid leading to when the outlet duct does not discharge the natural gas because the damage of external factor or gas collection subassembly, detect the alarm and no longer work, guarantee that the staff can learn leak department or hidden danger exist the department and investigate and maintain it.
To sum up, the utility model discloses a beneficial technological effect does: the gas collecting assembly is arranged to cover the joint of two adjacent pipelines, when the joint leaks, the gas collecting assembly can collect leaked natural gas, the gas outlet pipe connected with the gas collecting assembly is arranged, and the gas outlet of the gas outlet pipe faces the detection alarm, so that the situation that the detection alarm cannot well detect the leakage of the natural gas due to the fact that the natural gas is randomly diffused in the air is avoided; the hoop and the gas collecting cover are arranged, so that the gas collecting assembly is convenient to mount on the pipeline; through setting up the detection alarm, utilize the resistance of detection resistance to reduce when natural gas leaks to make the gained magnitude of voltage increase of divider resistance, realize detecting signal's output, thereby realize reporting to the police.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;
fig. 2 is an exploded view of a part of the structure of the first embodiment of the present invention, which mainly shows the composition relationship of the gas collecting assembly;
fig. 3 is a schematic circuit structure diagram of a first embodiment of the present invention, mainly showing the structure of the connection ring and the connection member;
fig. 4 is an exploded view of a part of the structure of the second embodiment of the present invention, which mainly shows the connection relationship between the air plug and the air outlet pipe;
fig. 5 is a schematic circuit diagram of a second embodiment of the present invention.
In the figure, 1, a gas collection assembly; 11. a gas-collecting hood; 111. an external thread; 12. hooping; 121. a hoop sheet; 1211. an internal thread; 122. sealing gaskets; 2. an air outlet pipe; 21. an air lock; 22. a connecting rod; 3. detecting an alarm; 31. a protective shell; 311. an air outlet; 32. a detection unit; 33. a control unit; 331. a control circuit; 332. a self-locking circuit; 34. an alarm unit; 341. an alarm.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, for the utility model discloses a natural gas conveying pipeline gas leakage detection device, including setting up in the gas collection subassembly 1 of two adjacent pipe connections departments, gas collection subassembly 1 and pipeline sealing are connected, and when the junction between two adjacent pipes took place the natural gas and leaks, gas collection subassembly 1 can be collected the natural gas of leaking. One side of gas collection subassembly 1 is equipped with detection alarm 3, and gas collection subassembly 1 is connected with the outlet duct 2 that the gas outlet faced detection alarm 3, because the natural gas is lighter than the air, escapes from the gas outlet of outlet duct 2 easily to make detection alarm 3 can be fast accurate detect out the pipeline gas leakage.
Referring to fig. 1 and 2, to facilitate the installation of the gas collecting assembly 1 on the pipelines, the gas collecting assembly 1 includes a gas collecting channel 11 covering between two adjacent pipelines and hoops 12 sealing-installed at two ends of the gas collecting channel 11. In order to ensure that the gas collecting component 1 can better collect leaked natural gas, the gas outlet pipe 2 is communicated with the gas collecting hood 11; the staple bolt 12 is convex along the cross-section of its axis direction, and the diameter that staple bolt 12 kept away from gas collecting channel 11 one end is less than the diameter of staple bolt 12 towards gas collecting channel 11 one end, and the one end that staple bolt 12 kept away from gas collecting channel 11 is contradicted with the pipeline outer wall, and staple bolt 12 is towards gas collecting channel 11 one end and gas collecting channel 11 outer wall threaded connection.
Referring to fig. 2, the hoop 12 includes two hoop sheets 121 fixedly connected by bolts and nuts, and a sealing gasket 122 disposed inside the hoop sheet 121, an internal thread 1211 is formed inside one end of the hoop sheet 121 with a larger diameter, and external threads 111 are formed outside two ends of the gas collecting hood 11. The sealing gasket 122 is disposed at one end of the hoop piece 121 with a smaller diameter, and the sealing gasket 122 is disposed inside the two hoop pieces 121, so as to enhance the sealing performance between the hoop 12 and the pipe. After the two hoop sheets 121 are fixed by the matching of the bolts and the nuts, the internal threads 1211 on the two hoop sheets 121 are butted to form a complete thread which can be connected with the external threads 111 of the gas collecting hood 11.
Referring to fig. 2 and 3, the detection alarm 3 includes a protection cover disposed outside, and a detection unit 32, a control unit 33, an alarm unit 34, and a power VCC disposed inside the protection cover. The protective cover is used for preventing rain and wind so as to reduce the influence of external factors on detection, and meanwhile, the detection alarm 3 is protected, and the service life of the detection alarm 3 is prolonged; a plurality of ventholes 311 have been seted up to the protection casing lower extreme face, and when the pipeline gas leakage, the natural gas can be discharged through venthole 311, avoids the natural gas to gather in detecting alarm 3 and danger such as explosion takes place.
Referring to fig. 2 and 3, the detecting unit 32 is configured to detect whether the gas discharged from the gas outlet of the gas outlet pipe 2 contains natural gas, and output a detection signal when detecting that the natural gas exists; the control unit 33 is coupled to the detection unit 32, receives and responds to the detection signal, and outputs a control signal when receiving the detection signal; the alarm unit 34 is coupled to the control unit 33, receives and responds to the control signal, and outputs an alarm signal when receiving the control signal; the power supply VCC supplies the electric power required for the operation of the detection alarm 3. Whether the natural gas leaks is detected by arranging the detection unit 32, and the alarm unit 34 gives an alarm when the natural gas leaks, so that the staff is prompted to timely treat the leakage position.
Referring to fig. 3, the detection unit 32 includes a detection resistor and a voltage dividing resistor RF connected in series between the power supply VCC and the ground, in this embodiment, the detection resistor is an N-type gas sensitive resistor, and the resistance of the detection resistor decreases with the increase of other concentrations when natural gas leaks. An input terminal of the control unit 33 is coupled to a connection point between the detection resistor and the voltage dividing resistor RF, and the control unit 33 includes a control circuit 331 and a self-locking circuit 332. The control circuit 331 includes a transistor Q having a base coupled to the output terminal of the detection unit 32, and the transistor Q is an NPN transistor Q; when natural gas leaks, the resistance value of the detection resistor is reduced, so that the voltage value obtained by dividing the voltage dividing resistor RF is increased, at the moment, the detection signal is output in a high level mode, and the triode Q is conducted. An excitation coil of the relay KM is connected in series between the collector of the triode Q and the power supply VCC, and the emitter of the triode Q is connected with a protective resistor R and is grounded through the protective resistor R.
Referring to fig. 3, the self-locking circuit 332 includes a first normally open contact KM-1 connected in parallel to both ends of the excitation coil of the relay KM, and when the transistor Q is turned on, the excitation coil of the relay KM is energized, so that the first normally open contact KM-1 is attracted and closed, thereby maintaining the excitation coil of the relay KM in an energized state. The alarm unit 34 comprises a relay KM second normally open contact KM-2 and an alarm 341 which are connected in series between a power supply VCC and the ground, and when an excitation coil of the relay KM is electrified, the second normally open contact KM-2 of the relay KM is closed, so that the alarm 341 is communicated with the power supply VCC. Alarm 341 includes GPS locator, signal sounder HA and the warning light that sets up each other parallelly connected, through signal sounder HA and warning light to the staff is indicateed in sound and light two-sidedly, thereby guarantees that the staff can quick identification leakage point, through setting up the GPS locator, thereby makes things convenient for the staff to carry out remote monitoring, and fixes a position the leakage place fast.
Example two:
referring to fig. 4 and 5, the utility model discloses a natural gas transportation pipeline gas leakage detection device, its difference with embodiment one lies in: in this embodiment, the detection resistor is a slide rheostat RP, the detection alarm 3 is disposed above the gas collection assembly 1, and the gas outlet pipe 2 is vertically disposed and has a gas plug 21 slidably connected to the gas outlet thereof. The slide rheostat RP is vertically arranged above the air plug 21, and when initial installation is detected, a slide sheet of the slide rheostat RP is positioned on one side, facing the ground, of the fixed value resistor, and the resistance value of the fixed value resistor connected into a circuit is the largest at the moment. Be equipped with insulating connecting rod 22 between the gleitbretter of air lock 21 top and slide rheostat RP, realize through insulating connecting rod 22 that air lock 21 and slide rheostat RP are connected between the gleitbretter, the one end card that connecting rod 22 was kept away from to air lock 21 is equipped with the gas tank, when the inside atmospheric pressure of gas collecting channel 11 strengthened, air lock 21 received pressure and upwards jacks up, when the gas tank of gas lock 21 was located the upper end of outlet duct 2, the gas tank internal drainage can be followed to the natural gas in the gas collecting channel 11 to avoid the natural gas to gather and take place the explosion.
Referring to fig. 4 and 5, when the natural gas does not leak, the gas plug 21 slides downward under the action of gravity and collides with the outlet pipe 2 to block the outlet of the outlet pipe 2; when natural gas leaks, the gas in the gas collecting hood 11 is increased, so that the gas pressure in the gas collecting hood 11 is increased, the gas plug 21 is jacked up by the natural gas to slide upwards, namely, slides towards one end far away from the gas collecting assembly 1, and at the moment, the slide sheet of the slide rheostat RP is driven to slide on the fixed value resistor, so that the resistance value of the resistor connected to a circuit is reduced. The resistance value of the detection resistor is reduced, so that the voltage value obtained by dividing the divider resistor RF is increased, at the moment, the detection signal is output in a high level, the triode Q is conducted, and the alarm unit 34 sends out an alarm signal.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. The utility model provides a natural gas transmission pipeline gas leakage detection device which characterized in that: including setting up in gas collection subassembly (1) of two adjacent pipe connections, gas collection subassembly (1) and pipeline sealing connection, one side of gas collection subassembly (1) is equipped with detection alarm (3), gas collection subassembly (1) is connected with outlet duct (2) that the gas outlet moved towards detection alarm (3).
2. The natural gas transmission pipeline gas leakage detection device according to claim 1, wherein: the gas collecting assembly (1) comprises a gas collecting hood (11) and hoops (12), wherein the gas collecting hood (11) is arranged between two adjacent pipelines in a covering mode, the hoops (12) are arranged at two ends of the gas collecting hood (11) in a sealing mode, the cross section of the hoops (12) in the axis direction is in a convex shape, the diameter of one end, far away from the gas collecting hood (11), of each hoop (12) is smaller than the diameter of one end, far away from the gas collecting hood (11), of each hoop (12), and the end, far away from the gas collecting hood (11), of each hoop (12) is abutted to the.
3. The natural gas transmission pipeline gas leakage detection device according to claim 2, wherein: the hoop (12) comprises two hoop sheets (121) fixedly connected through bolts and nuts and a sealing gasket (122) arranged on the inner side of the hoop sheets (121).
4. The natural gas transmission pipeline gas leakage detection device according to claim 2, wherein: the detection alarm (3) comprises:
the detection unit (32) is used for detecting whether the gas discharged from the gas outlet of the gas outlet pipe (2) contains natural gas or not and outputting a detection signal when the natural gas is detected to exist;
a control unit (33) coupled to the detection unit (32) for receiving and responding to the detection signal, and outputting a control signal when receiving the detection signal;
the alarm unit (34) is coupled with the control unit (33), receives and responds to the control signal, and outputs an alarm signal when receiving the control signal; and
and the power supply is used for supplying electric energy required by the work for the detection alarm (3).
5. The natural gas transmission pipeline gas leakage detection device according to claim 4, wherein: the detection unit (32) comprises a detection resistor and a divider resistor which are connected in series between a power supply and the ground, and the input end of the control unit (33) is coupled with a connection point between the detection resistor and the divider resistor.
6. The natural gas transmission pipeline gas leakage detection device according to claim 5, wherein: the detection resistor is an N-type gas-sensitive resistor.
7. The natural gas transmission pipeline gas leakage detection device according to claim 5, wherein: the detection resistor is a sliding rheostat, the detection alarm (3) is arranged above the gas collection assembly (1), the gas outlet pipe (2) is vertically arranged, a gas plug (21) is connected to a gas outlet of the gas outlet pipe in a sliding mode, when natural gas leaks, the gas plug (21) slides towards one end far away from the gas collection assembly (1), the gas plug (21) is connected with a sliding piece of the sliding rheostat, and when the gas plug (21) slides towards one end far away from the gas collection assembly (1), the resistance value of the sliding rheostat in an access circuit is reduced.
8. The natural gas transmission pipeline gas leakage detection device according to claim 4, wherein: the control unit (33) comprises a control circuit (331), the control circuit (331) comprises a triode, the base of which is coupled with the output end of the detection unit (32), an excitation coil of a relay is connected in series between the collector of the triode and a power supply, and the emitter of the triode is grounded.
9. The natural gas transmission pipeline gas leakage detection device according to claim 8, wherein: the control unit (33) further comprises a self-locking circuit (332), the self-locking circuit (332) comprises first normally open contacts connected to two ends of the relay excitation coil in parallel, and after the relay excitation coil is electrified, the first normally open contacts are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921566016.3U CN210532089U (en) | 2019-09-19 | 2019-09-19 | Natural gas transmission pipeline gas leakage detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921566016.3U CN210532089U (en) | 2019-09-19 | 2019-09-19 | Natural gas transmission pipeline gas leakage detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678052A (en) * | 2020-06-17 | 2020-09-18 | 王昌济 | Pipeline sealing detection mechanism for air separation device |
| CN114295303A (en) * | 2021-08-20 | 2022-04-08 | 襄阳新舟自动化科技有限公司 | Lifeboat airtightness detector and detection method thereof |
-
2019
- 2019-09-19 CN CN201921566016.3U patent/CN210532089U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678052A (en) * | 2020-06-17 | 2020-09-18 | 王昌济 | Pipeline sealing detection mechanism for air separation device |
| CN114295303A (en) * | 2021-08-20 | 2022-04-08 | 襄阳新舟自动化科技有限公司 | Lifeboat airtightness detector and detection method thereof |
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