CN110594595A - Pipeline gas leakage prevention monitoring device for natural gas conveying pipeline - Google Patents
Pipeline gas leakage prevention monitoring device for natural gas conveying pipeline Download PDFInfo
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- CN110594595A CN110594595A CN201910994906.2A CN201910994906A CN110594595A CN 110594595 A CN110594595 A CN 110594595A CN 201910994906 A CN201910994906 A CN 201910994906A CN 110594595 A CN110594595 A CN 110594595A
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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
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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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
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- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a pipeline leakage prevention monitoring device for a natural gas conveying pipeline, which comprises a monitoring mechanism, a bottom cabinet, a stabilizing mechanism, a PLC (programmable logic controller), a buffering mechanism and a natural gas detector, wherein the bottom cabinet is arranged below the monitoring mechanism and used for supporting the monitoring mechanism, the stabilizing mechanism is arranged above the bottom cabinet and used for stabilizing the monitoring mechanism, the PLC is arranged above the bottom cabinet, fixed through the stabilizing mechanism and used for controlling the monitoring mechanism, the buffering mechanism is used for supporting the monitoring mechanism to extrude, and the PLC is arranged above the bottom cabinet and connected with the natural gas detector through a lead. Whether monitoring mechanism through setting up leaks gas to natural gas line monitors to make strengthen natural gas line when manufacturing, avoided the later stage to make natural gas line appear damaged problem when using, thereby influence the normal use of pipeline, still guarantee that natural gas line can not leak gas when using, thereby ensured the security performance of pipeline use.
Description
Technical Field
The invention relates to a natural gas pipeline use environment monitoring device, in particular to a pipeline gas leakage prevention monitoring device for a natural gas conveying pipeline.
Background
When the existing natural gas pipeline is produced and manufactured again, the problem of air leakage needs to be checked, and some pipelines are not subjected to a pressure experiment but only checked to have air leakage, however, when the pipeline is used, the pressure born by the pipeline is much higher than the pressure tested normally due to weather, atmospheric pressure, pressure inside the pipeline when natural gas is conveyed and the like, sometimes, the gas pipeline is always leaked due to the factors, the environment is polluted, for example, the gas pipeline near the steel plant is broken, which not only causes pollution to the nearby environment, but also has certain potential safety hazard, the quality of the produced natural gas pipeline needs to be monitored, so that the safety of a production workshop is guaranteed, and the safety of using the natural gas pipeline in the later period is also guaranteed.
Disclosure of Invention
The invention aims to provide a pipeline leakage prevention monitoring device for a natural gas conveying pipeline, which has the functions of monitoring whether a natural gas pipeline leaks gas or not through an arranged monitoring mechanism, so that the natural gas pipeline is strengthened in production and manufacturing, the problem that the natural gas pipeline is damaged in later use is avoided, the normal use of the pipeline is influenced, the natural gas pipeline cannot leak gas in use is also ensured, and the use safety performance of the pipeline is ensured.
The purpose of the invention can be realized by the following technical scheme:
a pipeline leakage prevention monitoring device for a natural gas conveying pipeline comprises a monitoring mechanism, a bottom cabinet, a stabilizing mechanism, a PLC, a buffering mechanism, a natural gas detector, a pushing mechanism and a monitoring assembly, wherein the bottom cabinet is arranged below the monitoring mechanism and used for supporting the monitoring mechanism, the stabilizing mechanism is arranged above the bottom cabinet and used for stabilizing the monitoring mechanism, the PLC is arranged above the bottom cabinet and fixed through the stabilizing mechanism and used for controlling the monitoring mechanism, the buffering mechanism is used for supporting the monitoring mechanism to extrude, the natural gas detector is arranged above the bottom cabinet and connected with the PLC through a wire, the monitoring mechanism comprises a pushing mechanism fixed on the inner wall of the top of the stabilizing mechanism, the monitoring assembly is arranged above the bottom cabinet and matched with the pushing mechanism, the monitoring assembly comprises a longitudinal upper extruding assembly fixed above the pushing mechanism and three transversely arranged lower extruding assemblies arranged at the three side edges of the bottom cabinet, the upper extrusion assembly is positioned above the lower extrusion assembly. Whether monitoring mechanism leaks gas to natural gas line through the monitoring mechanism that sets up monitors, stabilizing mean through the setting stabilizes monitoring mechanism, provide airtight space when still monitoring for monitoring mechanism, PLC through setting controls the operation of device, carry out the analysis to gaseous monitoring, natural gas detector through the setting monitors natural gas, pushing mechanism through the setting provides the power supply for the device, realize the inside space of extrusion natural gas line, a plurality of products of once only monitoring of extrusion subassembly under a plurality of through the setting, improve monitoring efficiency.
Preferably, the pushing mechanism comprises a cylinder fixed at the bottom of the top plate, a fixed plate arranged at the bottom of the cylinder, a movable plate arranged below the fixed plate, a fixed rod arranged between the bottom of the movable plate and the transverse plate, movable stabilizer bars sleeved at four corners of the movable plate, and the bottom of each stabilizer bar is fixed on the surface of the bottom plate. The monitoring mechanism is driven by the aid of the arranged pushing mechanism, and the transverse plate fixed to the bottom of the movable plate is driven to move together by the aid of the fixed plate and the movable plate fixed to the bottom of the arranged cylinder, so that movement of the clamping seat is controlled, and the space for extruding the natural gas pipeline is controlled.
Preferably, the upper extrusion assembly comprises a transverse plate, two ends of the transverse plate are fixed on the fixing rod, a pushing block is arranged on the surface of the transverse plate and used for fixing the pushing plate, the top of the pushing block is fixed on a clamping seat arranged at the bottom of the air cylinder and arranged at the bottom of the pushing plate, two rows of symmetrical second sleeves are arranged on the outer side wall of the clamping seat in an inclined mode, the cross section of the clamping seat is of a U-shaped structure, and the opening of the clamping seat faces downwards. Realize monitoring natural gas line through the last extrusion subassembly that sets up, realize once only monitoring a plurality of natural gas line through the cassette that sets up, play the operation of stabilizing the diaphragm through the cooperation of the kickboard that sets up and promotion piece, just can be more stable when carrying out the extrusion in the fixed cassette of diaphragm bottom.
Preferably, lower extrusion subassembly includes that the bottom is fixed two vertical side limiting plates on the bottom plate on end cabinet surface, sets up the connecting plate that side limiting plate tip is square structure runs through the first sleeve at connecting plate middle part sets up the fixing base that is used for the gas pipeline of fixed monitoring of first sleeve tip sets up the inside of fixing base is used for installing the card hole of gas pipeline, sets up the slide bar that is used for removing of connecting plate one side sets up slide bar tip with the parallel baffle of connecting plate sets up the baffle middle part is used for compressing the gaseous sealed piece in card hole sets up sealed piece that is used for of sealed piece one side hollow removal seat, sealed piece with the inside aperture looks adaptation of removal seat sets up the second connector that is used for inputing the natural gas on the removal seat. Realize carrying out many times monitoring on the basis of last extrusion subassembly extrusion monitoring through the lower extrusion subassembly that sets up, improve the work efficiency who plays the monitoring, make the connecting plate directly extrude the slide bar and remove the seat through the cooperation of the first sleeve that sets up and connecting plate, sealed piece plays when removing and carries out sealed effect to removing the seat, can guarantee the extruded while, the condition of gas leakage can not appear to can guarantee the accuracy of monitoring. Thereby the space of CNG pipeline plays through the sealed piece that sets up and realizes sealed function in the removal, still does not influence the coupling and admits air, plays the fixing base that plays through the setting and makes the natural gas pipeline be convenient for fixed in the extrusion. The end part of the natural gas pipeline is directly clamped through the clamping hole, sealing treatment is carried out after clamping, and air leakage of the connector is avoided in extrusion. The connecting plate that the just opposite lower extrusion subassembly of end cabinet is connected is fixed with one removal seat with using a slide bar, and the connecting plate presents the slope setting, makes the connecting plate directly promote to remove the seat and remove after last extrusion subassembly contacts with the just opposite lower extrusion subassembly of end cabinet like this to make and lie in the just opposite two lower extrusion subassemblies of end cabinet and realize the compression to gas, thereby detect whether natural gas line leaks gas.
Preferably, the clamping seat comprises an inner cavity for conveying natural gas, a first connecting port arranged on the side wall of the clamping seat, a pipe joint arranged on the side wall of the clamping seat, and a spiral pipe arranged inside the pipe joint and used for inputting natural gas, wherein the inner cavity is communicated with the second sleeve. Realize monitoring a plurality of natural gas line through the cassette that sets up, realize convenient to detach and installation through the first connector and the coupling threaded connection that set up, realize supplying gas the tensile of in-process through the spiral pipe that sets up, but also can not influence the transport of natural gas.
Preferably, the buffer mechanism comprises a bottom plate fixed to the top of the bottom cabinet, a sliding plate arranged above the bottom plate, a base plate arranged on the sliding plate, four circular holes evenly distributed in the base plate, a sliding block arranged at the bottom of the base plate, a sliding rod fixed to the surface of the bottom plate and slidably connected with the sliding block, a U-shaped frame arranged on the side wall of the base plate and used for pulling the base plate, a limiting block arranged at the end of the sliding rod, and an outward protruding extending plate arranged on one side of the bottom plate. The sliding plate is arranged to adjust the upper extrusion assembly to fall on the surface of the sliding plate, and the sliding plate is used for adjusting the positions of the upper extrusion assembly and the lower extrusion assembly opposite to each other, so that the upper extrusion assembly and the lower extrusion assembly are protected. The U-shaped frame is convenient for pulling the buffer mechanism to adjust the position. The sliding block and the sliding rod are matched for use, so that the sliding plate can slide conveniently.
Preferably, the stabilizing mechanism comprises a stabilizing frame arranged above the bottom cabinet, and a top plate arranged at the top of the stabilizing frame and used for fixing the monitoring mechanism. The operation of realizing the stable monitoring mechanism through the stabilizing mechanism who sets up still plays sealing performance, is convenient for monitor natural gas leakage.
Preferably, the bottom cabinet comprises two cabinet doors for maintenance, side cabinet plates arranged on two sides of each cabinet door, a plurality of heat dissipation holes uniformly distributed on the side cabinet plates, and wire holes for connecting power wires, wherein the heat dissipation holes are formed in the back of the bottom cabinet. The bottom cabinet is convenient for dispel the heat to PLC through the end cabinet that sets up, still dismantles and installs monitoring mechanism, is convenient for maintain PLC.
Preferably, the PLC is installed on one side of the surface of the base plate, and a back plate for maintenance is installed on the back surface of the PLC. The back plate is detached and installed, so that the PLC can be conveniently opened for maintenance.
Preferably, the use method of the monitoring device comprises the following specific steps,
the method comprises the following steps: installing a pipeline to be monitored inside the first sleeve and the second sleeve, sealing the end part of the pipeline, far away from the first sleeve and the second sleeve, by using a circular plate made of the same material as the pipeline, wherein the sealing mode adopts a fire sealing method or a glue sealing method, checking whether the sealed part leaks air or not after sealing, respectively connecting the natural gas pipeline to the first connecting port and the second connecting port through pipe joints, and connecting and sealing a stabilizing frame on the inner side of the stabilizing mechanism by using a glass cover so as to form a closed space on the inner side of the stabilizing mechanism;
step two: opening the PLC, pressing the button to enable the button to control the cylinder inside the monitoring mechanism to operate, driving an upper extrusion assembly in the monitoring assembly to move downwards under the pushing of the pushing mechanism by the operation of the cylinder, enabling a sealing block at the bottom of the upper extrusion assembly and the end part of a lower extrusion assembly to be abutted against a base plate, extruding a second sleeve, starting to input natural gas after the sealing block at the bottom of the second sleeve passes through a first connector, continuing to extrude the sealing block to enable the sealing block to compress the gas inside a natural gas pipeline inside the second sleeve until the edges of the two sides of a clamping seat are contacted with the base plate, enabling the two sides of the clamping seat to be contacted with the lower extrusion assembly while the clamping seat operates downwards, pushing a baffle at the end part of the lower extrusion assembly and the sealing block to the two sides together, inputting natural gas into the first sleeve while pushing, and enabling the gas inside the natural gas pipeline connected to the end part of the first sleeve to be compressed, and then closing the switch to stop the operation of the cylinder, standing the natural gas pipeline in the stabilizing mechanism for 5-15 minutes, wherein the natural gas detector does not give an alarm, namely the pipeline is not gas-tight, and the natural gas detector gives an alarm, namely the natural gas pipeline is gas-tight.
The invention has the beneficial effects that: whether monitoring mechanism through setting up leaks gas to natural gas line monitors to make strengthen natural gas line when manufacturing, avoided the later stage to make natural gas line appear damaged problem when using, thereby influence the normal use of pipeline, still guarantee that natural gas line can not leak gas when using, thereby ensured the security performance of pipeline use.
The pushing mechanism drives the movable plate and the fixed plate to move downwards through the arrangement, the movable plate is pushed downwards under the action of the cylinder, the movable plate can slide downwards on the surface of the stabilizer bar, the transverse plate is fixed through the fixed rod at the bottom of the movable plate, the transverse plate is driven to move downwards when moving downwards, the second sleeve fixed on the surface of the transverse plate can move downwards along with the transverse plate, the natural gas pipeline arranged inside the second sleeve can be extruded, whether gas leaks or not can be checked when the pipeline bears pressure, if the pipeline does not leak gas, the pipeline produced is proved to be normally used, and otherwise, the production is unqualified.
Realize synchronous motion when last pushing assembly downstream through the lower pushing assembly that sets up, when last pushing assembly extrusion down pushing assembly, the lower pushing assembly of end cabinet top both sides can direct extrusion connecting plate and sealed piece, the connecting plate that the lower pushing assembly that the end cabinet is just opposite connects is fixed with a removal seat with using a slide bar, and the connecting plate presents the slope setting, make the connecting plate directly promote to remove the seat and remove after last pushing assembly contacts with the lower pushing assembly that the end cabinet is just opposite like this, thereby make two lower pushing assemblies that lie in the end cabinet are just opposite realize the compression to gas, thereby detect whether gas pipeline leaks gas.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a second schematic view of the overall structure of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 4 is an enlarged view of the structure at B in FIG. 2;
FIG. 5 is an enlarged view of the structure at C in FIG. 2;
FIG. 6 is an enlarged view of the structure shown at D in FIG. 2;
FIG. 7 is a front view of the present invention;
FIG. 8 is a rear elevational view of the present invention;
FIG. 9 is a left side view of the present invention;
FIG. 10 is a top view of the present invention;
fig. 11 is a schematic view of a connection structure of the cartridge and the pipe joint according to the present invention.
In the figure: 1. a monitoring mechanism; 11. a cylinder; 12. a fixing plate; 13. moving the plate; 14. a stabilizer bar; 15. a side limiting plate; 16. a fixed seat; 17. a clamping hole; 18. a first sleeve; 19. a connecting plate; 101. a push plate; 102. a first connection port; 103. a card holder; 104. a second sleeve; 105. a second connection port; 106. a movable seat; 107. a sealing block; 108. a baffle plate; 109. a slide bar; 110. a base plate; 111. a circular hole; 112. a transverse plate; 113. a slider; 114. a slide bar; 115. a U-shaped frame; 116. a base plate; 117. fixing the rod; 118. a natural gas detector; 119. extending the plate; 120. a limiting block; 122. a sliding plate; 123. a pushing block; 2. a stabilizing mechanism; 21. a stabilizer frame; 22. a top plate; 3. a bottom cabinet; 31. heat dissipation holes; 32. a side cabinet panel; 33. a cabinet door; 34. a wire hole; 4. a PLC; 41. a back panel; 1031. a spiral tube; 1032. a pipe joint; 1033. an inner cavity.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-11, a pipeline leakage prevention monitoring device for a natural gas transmission pipeline comprises a monitoring mechanism 1, a bottom cabinet 3 arranged below the monitoring mechanism 1 and used for supporting the monitoring mechanism 1, a stabilizing mechanism 2 arranged above the bottom cabinet 3 and used for stabilizing the monitoring mechanism 1, a PLC4 arranged above the bottom cabinet 3 and fixed through the stabilizing mechanism 2 and used for controlling the monitoring mechanism 1, a buffer mechanism arranged for supporting the monitoring mechanism 1 to extrude, a natural gas detector 118 arranged above the bottom cabinet 3 and connected with the PLC4 through a lead, the monitoring mechanism 1 comprises a pushing mechanism fixed on the inner wall of the top of the stabilizing mechanism 2, a monitoring component arranged above the bottom cabinet 3 and matched with the pushing mechanism, the monitoring component comprises a longitudinal upper extrusion component fixed above the pushing mechanism and three transversely arranged lower extrusion components arranged at the three side edges of the bottom cabinet 3, the upper extrusion assembly is positioned above the lower extrusion assembly. Whether monitoring mechanism 1 leaks gas to the natural gas line through the setting monitors, 2 stabilize monitoring mechanism 1 through the stabilizing mean that sets up, still provide airtight space when monitoring mechanism monitors for monitoring mechanism 1, PLC4 through setting controls the operation of device, carry out the analysis to gaseous monitoring, natural gas is monitored through natural gas detector 118 that sets up, pushing mechanism through the setting provides the power supply for the device, realize the inside space of extrusion natural gas line, once only monitor a plurality of products through a plurality of lower extrusion subassemblies that set up, improve monitoring efficiency.
Specifically, the pushing mechanism includes a cylinder 11 fixed at the bottom of the top plate 22, a fixed plate 12 disposed at the bottom of the cylinder 11, a moving plate 13 disposed below the fixed plate 12, a fixed rod 117 disposed at the bottom inside the moving plate 13 and fixed to the horizontal plate 112, four corners of the moving plate 13 are sleeved with movable stabilizer bars 14, and the bottom of the stabilizer bars 14 is fixed on the surface of the bottom plate 116. The monitoring mechanism is driven by the arranged pushing mechanism, and the transverse plate 112 fixed at the bottom of the movable plate 13 is driven to move together by the fixed plate 12 and the movable plate 13 fixed at the bottom of the arranged cylinder 11, so that the movement of the clamping seat 103 is controlled, and the space for extruding the natural gas pipeline is controlled.
Specifically, the upper extrusion assembly comprises a transverse plate 112, two ends of which are fixed on the fixing rod 117, a pushing block 123 arranged on the surface of the transverse plate 112 and used for fixing the pushing plate 101, the top of the pushing block 123 is fixed at the bottom of the air cylinder 11, a clamping seat 103 arranged at the bottom of the pushing plate 101, two rows of symmetrical second sleeves 104 arranged on the outer side wall of the clamping seat 103 in an inclined manner, the cross section of the clamping seat 103 is in a U-shaped structure, and an opening of the clamping seat 103 faces downwards. Realize monitoring natural gas line through the last extrusion subassembly that sets up, realize a plurality of natural gas line of disposable monitoring through the cassette 103 that sets up, play the operation of stabilizing diaphragm 112 through the cooperation of the kickboard 101 that sets up and promotion piece 123, the cassette 103 that the diaphragm 112 bottom is fixed just can be more stable when carrying out the extrusion.
Specifically, lower extrusion subassembly includes that the bottom is fixed two vertical side limiting plates 15 on the bottom plate 116 on end cabinet 3 surface, the setting is at the connecting plate 19 that side limiting plate 15 tip is square structure, run through the first sleeve 18 in connecting plate 19 middle part, the fixing base 16 that is used for the fixed gas pipeline of monitoring of first sleeve 18 tip, the card hole 17 that is used for installing the gas pipeline that sets up in the inside of fixing base 16, the slide bar 109 that is used for removing that sets up in connecting plate 19 one side, the baffle 108 that is parallel with connecting plate 19 that sets up at slide bar 109 tip, the sealing block 107 that is used for compressing the inside gas of card hole 17 that sets up in the middle part of baffle 108, the hollow removal seat 106 of setting in sealing block 107 one side, sealing block 107 and the inside aperture looks adaptation of removal seat 106, set up the second connector 105 that is used for importing the natural gas on removing seat 106. Realize carrying out many times monitoring on the basis of last extrusion subassembly extrusion monitoring through the lower extrusion subassembly that sets up, the work efficiency of monitoring is played in the improvement, make connecting plate 19 directly extrude slide bar 109 and removal seat 106 through the cooperation of the first sleeve 18 that sets up and connecting plate 19, thereby the space of CNG pipeline, play through the sealed piece 107 that sets up and realize sealed function when removing, sealed piece 107 plays and carries out sealed effect to removal seat 106 when removing, when can guaranteeing the extrusion, the condition of gas leakage can not appear, thereby can guarantee the accuracy of monitoring. Still do not influence coupling 1032 and admit air, play through the fixing base 16 that sets up and make the natural gas line be convenient for fixed when the extrusion. The end part of the natural gas pipeline is directly clamped through the arranged clamping hole 17, sealing treatment is carried out after clamping, and air leakage of the connector is avoided in extrusion. Connecting plate 19 that the lower pressure subassembly that the positive opposite of end cabinet 3 is connected is fixed with one through a slide bar 109 and one and removes seat 106, and connecting plate 19 presents the slope setting, makes connecting plate 19 directly promote to remove seat 106 and remove after last pressure subassembly contacts with the positive opposite lower pressure subassembly of end cabinet 3 like this to make two lower pressure subassemblies that lie in the positive opposite of end cabinet 3 realize the compression to gas, thereby detect whether natural gas line leaks gas.
Specifically, the card socket 103 includes an inner cavity 1033 for transporting natural gas, a first connector 102 disposed on a sidewall of the card socket 103, a coupler 1032 mounted on a sidewall of the card socket 103, a coil 1031 disposed inside the coupler 1032 for inputting natural gas, and the inner cavity 1033 is communicated with the second sleeve 104. Realize monitoring a plurality of natural gas line through the cassette 103 that sets up, realize convenient to detach and installation through the first interface 102 and the coupling 1032 threaded connection who sets up, realize supplying gas the tensile of in-process through the spiral pipe 1031 that sets up, but also can not influence the transport of natural gas.
Specifically, buffer gear is including fixing the bottom plate 116 at bottom cabinet 3 top, the sliding plate 122 of setting in bottom plate 116 top, the backing plate 110 of setting on sliding plate 122, set up four evenly distributed's circular port 111 on backing plate 110, the slider 113 of setting in backing plate 110 bottom, fix on bottom plate 116 surface and slider 113 sliding connection's slide bar 114, the U-shaped frame 115 that is used for pulling backing plate 110 that sets up at backing plate 110 lateral wall, the stopper 120 of setting at slide bar 114 tip, one side of bottom plate 116 is provided with outside bellied and stretches board 119. The upper extrusion assembly is adjusted to fall on the surface of the sliding plate 122 through the arranged sliding plate 122, and the sliding plate 122 also adjusts the positions of the two lower extrusion assemblies and the upper extrusion assembly which are opposite to the bottom cabinet 3, so that the upper extrusion assembly and the lower extrusion assembly are protected. The U-shaped frame 115 is arranged to facilitate the pulling and position adjustment of the buffer mechanism. The sliding block 113 and the sliding bar 114 are used in cooperation to facilitate the sliding of the sliding plate 122.
Specifically, the stabilizing mechanism 2 includes a stabilizing frame 21 disposed above the bottom cabinet 3, and a top plate 22 disposed on the top of the stabilizing frame 21 for fixing the monitoring mechanism 1. The operation that realizes stable monitoring mechanism 1 through the stabilizing mean 2 that sets up plays sealing performance, is convenient for monitor natural gas leakage.
Specifically, the bottom cabinet 3 includes two cabinet doors 33 for maintenance, side cabinet plates 32 disposed on both sides of the cabinet doors 33, a plurality of heat dissipation holes 31 uniformly distributed on the side cabinet plates 32, and a wire hole 34 disposed on the back of the bottom cabinet 3 and used for connecting power lines. Bottom cabinet 3 through setting up is convenient for dispel the heat to PLC4, still dismantles and installs monitoring mechanism 1, is convenient for maintain PLC 4.
Specifically, the PLC4 is mounted on the front side of the base plate 116, and the back plate 41 for maintenance is mounted on the back side of the PLC 4. The back panel 41 is arranged to be detached and installed, so that the PLC4 can be conveniently opened for maintenance.
In particular to a using method of the monitoring device, which comprises the following steps,
the method comprises the following steps: installing a pipeline to be monitored inside the first sleeve 18 and the second sleeve 104, sealing the end part of the pipeline, far away from the first sleeve 18 and the second sleeve 104, by using a circular plate made of the same material as the pipeline, wherein the sealing mode adopts a fire sealing method or a glue sealing method, checking whether the sealed part is air leakage after sealing, respectively connecting a natural gas pipeline to the first connecting port 102 and the second connecting port 105 through a pipe joint 1032, connecting and sealing the stabilizing frame 21 on the inner side of the stabilizing mechanism 2 by using a glass cover, and forming a closed space on the inner side of the stabilizing mechanism 2; when a gas leakage occurs, the natural gas source is only the natural gas pipeline leakage, and the natural gas detector 118 detects and gives an alarm.
Step two: the PLC4 is opened to control the operation of the air cylinder 11 in the monitoring mechanism 1, the operation of the air cylinder 11 drives the upper extrusion component in the monitoring component to move downwards under the pushing of the pushing mechanism, the sealing block 107 at the bottom of the upper extrusion component and the end part of the lower extrusion component are pressed against the backing plate 110, the second sleeve 104 is extruded, when the sealing block 107 at the bottom of the second sleeve 104 passes through the first connecting port 102, natural gas starts to be input, the sealing block 107 is continuously extruded to enable the sealing block 107 to compress the gas in the natural gas pipeline in the second sleeve 104 until the edges of the two sides of the clamping seat 103 are contacted with the backing plate 110, when the clamping seat 103 moves downwards, the two sides of the clamping seat 103 are contacted with the lower extrusion component, the baffle 108 and the sealing block 107 at the end part of the lower extrusion component are pushed towards the two sides together, the second connecting port 105 inputs natural gas into the first sleeve 18 while pushing, so that the gas in the natural gas pipeline connected with the end part of, then the switch is closed, so that the cylinder 11 stops running, the natural gas pipeline is placed in the stabilizing mechanism 2 for 5-15 minutes, the natural gas detector 118 does not give an alarm, namely the pipeline is not air-tight, the natural gas detector 118 gives an alarm, namely the natural gas pipeline is air-tight, the natural gas detector 118 transmits a signal to the PLC4 when detecting the natural gas leakage, the PLC4 sends a signal conversion alarm signal, and the type of the natural gas detector is as follows: the QB3000N series combustible gas detection alarm can be used in S7-300 series Siemens PLC controller.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The utility model provides a prevent pipeline gas leakage monitoring devices for natural gas conveying pipeline, its characterized in that includes monitoring mechanism (1), be arranged in the monitoring mechanism (1) below be used for supporting bottom cabinet (3) of monitoring mechanism (1), be arranged in bottom cabinet (3) top be used for stabilizing the stabilizing mean (2) of monitoring mechanism (1), set up in bottom cabinet (3) top pass through stabilizing mean (2) are fixed and be used for controlling PLC (4) of monitoring mechanism (1), be provided with and be used for supporting monitoring mechanism (1) and carry out the extruded buffer gear, set up in bottom cabinet (3) top with natural gas detector (118) that PLC (4) pass through the wire and connect, the monitoring mechanism (1) comprises a pushing mechanism fixed on the inner wall of the top of the stabilizing mechanism (2) and a monitoring assembly arranged above the bottom cabinet (3) and matched with the pushing mechanism;
the monitoring assembly comprises a longitudinal upper extrusion assembly fixed above the pushing mechanism and three transversely arranged lower extrusion assemblies arranged at the three side edges of the bottom cabinet (3), and the upper extrusion assembly is positioned above the lower extrusion assemblies.
2. The device for monitoring the leakage of gas from the natural gas conveying pipeline according to claim 1, wherein the pushing mechanism comprises a cylinder (11) fixed at the bottom of the top plate (22), a fixed plate (12) arranged at the bottom of the cylinder (11), a moving plate (13) arranged below the fixed plate (12), a fixed rod (117) arranged at the bottom inside the moving plate (13) and fixed to the horizontal plate (112), wherein movable stabilizer bars (14) are sleeved at four corners of the moving plate (13), and the bottom of each stabilizer bar (14) is fixed on the surface of the bottom plate (116).
3. The device for monitoring the gas leakage of the natural gas conveying pipeline according to claim 1, wherein the upper extrusion assembly comprises a transverse plate (112) with two ends fixed on a fixing rod (117), a pushing block (123) arranged on the surface of the transverse plate (112) and used for fixing a pushing plate (101), the top of the pushing block (123) is fixed at the bottom of the cylinder (11), a clamping seat (103) arranged at the bottom of the pushing plate (101), two rows of symmetrical second sleeves (104) arranged on the outer side wall of the clamping seat (103) in an inclined manner, the cross section of the clamping seat (103) is of a U-shaped structure, and the opening of the clamping seat (103) faces downward.
4. The device for preventing the gas leakage of the pipeline for the natural gas conveying pipeline according to claim 1, wherein the lower extrusion assembly comprises two vertical side limiting plates (15) with the bottoms fixed on a bottom plate (116) on the surface of the bottom cabinet (3), a connecting plate (19) which is arranged at the end part of the side limiting plates (15) and has a square structure, a first sleeve (18) penetrating through the middle part of the connecting plate (19), a fixed seat (16) which is arranged at the end part of the first sleeve (18) and is used for fixing the gas pipeline to be monitored, a clamping hole (17) which is arranged inside the fixed seat (16) and is used for installing the gas pipeline, a sliding rod (109) which is arranged at one side of the connecting plate (19) and is used for moving, a baffle plate (108) which is arranged at the end part of the sliding rod (109) and is parallel to the connecting plate (19), and a sealing block (107) which is arranged at the middle part of the baffle plate (108) and is used for compressing the gas inside, the sealing block (107) is arranged on the hollow moving seat (106) on one side of the sealing block (107), the sealing block (107) is matched with the hole diameter inside the moving seat (106), and a second connecting port (105) used for inputting natural gas is arranged on the moving seat (106).
5. The pipeline leakage prevention monitoring device for the natural gas transmission pipeline according to claim 3, wherein the clamping seat (103) comprises an inner cavity (1033) for transmitting natural gas, a first connecting port (102) arranged on the side wall of the clamping seat (103), a pipe joint (1032) installed on the side wall of the clamping seat (103), a spiral pipe (1031) arranged inside the pipe joint (1032) and used for inputting natural gas, and the inner cavity (1033) is communicated with the second sleeve (104).
6. The pipeline gas leakage prevention monitoring device for the natural gas transportation pipeline according to claim 1, characterized in that the buffer mechanism comprises a bottom plate (116) fixed at the top of the bottom cabinet (3), a sliding plate (122) arranged above the bottom plate (116), a base plate (110) arranged on the sliding plate (122), four circular holes (111) uniformly distributed on the base plate (110), a sliding block (113) arranged at the bottom of the base plate (110), a sliding rod (114) fixed on the surface of the bottom plate (116) and slidably connected with the sliding block (113), a U-shaped frame (115) arranged on the side wall of the base plate (110) and used for pulling the base plate (110), and a limiting block (120) arranged at the end part of the sliding rod (114), one side of the bottom plate (116) is provided with an extending plate (119) protruding outwards.
7. The device for monitoring the prevention of gas leakage from a pipeline for natural gas transportation pipelines according to claim 1, wherein the stabilizing means (2) comprises a stabilizing frame (21) disposed above the bottom cabinet (3), and a top plate (22) disposed on top of the stabilizing frame (21) for fixing the monitoring means (1).
8. The device for monitoring the leakage of gas from the pipeline for the natural gas transportation pipeline according to claim 4, wherein the bottom cabinet (3) comprises two cabinet doors (33) for maintenance, side cabinet plates (32) arranged at two sides of the cabinet doors (33), a plurality of uniformly distributed heat dissipation holes (31) arranged on the side cabinet plates (32), and a wire hole (34) arranged at the back of the bottom cabinet (3) for connecting a power line.
9. The pipe leakage prevention monitoring device for the natural gas conveying pipe according to claim 1, wherein the PLC (4) is installed at a surface side of the base plate (116), and a back plate (41) for maintenance is installed at a back surface of the PLC (4).
10. The pipeline gas leakage prevention monitoring device for the natural gas transportation pipeline is characterized in that the use method of the monitoring device comprises the following specific steps,
the method comprises the following steps: installing a pipeline to be monitored inside the first sleeve (18) and the second sleeve (104), sealing the end parts of the pipeline, far away from the first sleeve (18) and the second sleeve (104), by using a circular plate, checking whether the sealed part leaks air or not after sealing, respectively connecting the natural gas pipeline to the first connecting port (102) and the second connecting port (105) through a pipe joint (1032), and connecting and sealing a stabilizing frame (21) on the inner side of the stabilizing mechanism (2) by using a glass cover so that a sealed space is formed on the inner side of the stabilizing mechanism (2);
step two: opening a PLC (4) to control an air cylinder (11) in a monitoring mechanism (1) to operate, wherein the air cylinder (11) operates to drive an upper extrusion component in the monitoring component to move downwards under the pushing of a pushing mechanism, a sealing block (107) with the same end part as that of the lower extrusion component is abutted against a base plate (110) to extrude a second sleeve (104), natural gas starts to be input after the sealing block (107) at the bottom of the second sleeve (104) passes through a first connecting port (102), the sealing block (107) is continuously extruded to compress the gas in a natural gas pipeline in the second sleeve (104) until the edges of two sides of a clamping seat (103) are contacted with the base plate (110), when the clamping seat (103) operates downwards, two sides of the clamping seat (103) are contacted with the lower extrusion component, and a baffle (108) at the end part of the lower extrusion component and the sealing block (107) are pushed towards two sides together, the second connecting port (105) inputs natural gas into the first sleeve (18) while pushing, so that gas inside a natural gas pipeline connected to the end of the first sleeve (18) is compressed, then a switch is closed, the cylinder (11) is stopped to operate, the natural gas pipeline is placed in the stabilizing mechanism (2) for 5-15 minutes, the natural gas detector (118) does not give an alarm, namely the pipeline is not gas-tight, and the natural gas detector (118) gives an alarm, namely the natural gas pipeline is gas-tight.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910994906.2A CN110594595A (en) | 2019-10-18 | 2019-10-18 | Pipeline gas leakage prevention monitoring device for natural gas conveying pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910994906.2A CN110594595A (en) | 2019-10-18 | 2019-10-18 | Pipeline gas leakage prevention monitoring device for natural gas conveying pipeline |
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| US20030079553A1 (en) * | 2001-11-01 | 2003-05-01 | Cain Russell P. | Techniques for monitoring health of vessels containing fluids |
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