CN206875034U - The apparatus for examination and repair of in-service inflammable and explosive pipeline - Google Patents
The apparatus for examination and repair of in-service inflammable and explosive pipeline Download PDFInfo
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- CN206875034U CN206875034U CN201720789948.9U CN201720789948U CN206875034U CN 206875034 U CN206875034 U CN 206875034U CN 201720789948 U CN201720789948 U CN 201720789948U CN 206875034 U CN206875034 U CN 206875034U
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Abstract
It the utility model is related to the apparatus for examination and repair of in-service inflammable and explosive pipeline, interior closure plate screw rod part includes interior closure inner panel and screw rod, one cavity sleeve pipe being set in outside screw rod sequentially passes through closure outside plate, outer closure inner panel, outer closure outside plate and covering block sets pipe fitting backing plate, interior plugging plate outside plate and outer plugging plate inner panel are fixedly connected with cavity sleeve pipe, interior closure outside plate, outer closure inner panel and inner-walls of duct form closing space, connecting tube, connecting tube connection nitrogen replaceable equipment, pressure gauge or flammable explosive gas detector are communicated with the closing space.Rubber gasket is equipped between interior closure outside plate and interior closure inner panel and between outer closure inner panel and outer closure outside plate.The utility model apparatus structure is simple, easy to operate, can effectively improve inflammable and explosive pipe plugging tightness and Welding Safety, and the Welding Safety of inflammable and explosive pipeline is reliably used.
Description
Technical field
Inflammable and explosive welding procedure technical field is the utility model is related to, specifically a kind of inspection of in-service inflammable and explosive pipeline
Repair device.
Background technology
With China's coal chemical industry, the tremendous development of petrochemical industry and technological progress, HTHP, inflammable and explosive pipeline, disposably
The isolating problem of welded pipe line equipment room is more prominent, especially technological transformation project and factory repair pipeline in normal course of operation,
Often because the needing to overhaul, change, relocating of production and living, increase in pipeline during branch road etc. is transformed flammable explosive gas to
Pipeline welding brings the potential safety hazards such as very big fire explosion, while also requires more financial resources, material resources, manpower and time
Input.
Exemplified by by the Long Hu railway stations of Yuci in 2011, railway diesel pipeline changes road, original pipeline needs to carry out cutting off replacing pipe
Road, pipe diameter are Φ 168, and because diesel pipeline is connected with storage tank joint weld, required replacing pipeline is welded to connect with diesel fuel tank,
Diesel oil has discharged in tank and in pipe, but Residual oil clears up difficulty in tank and in pipe, and disposal costs are high, and the duration is nervous, furthermore diesel oil
Flash-point is relatively low, construction welding dangerous.
Current construction method is to use a whole set of pipeline and device systems stopping transport, clear to system-wide Residual oil etc.
Reason, welded after carrying out nitrogen displacement after rinsing, or at the pipeline operations before and after flange increase blind plate, and to being managed at this
Road carries out nitrogen displacement and cleaning, but the pipeline having, in order to ensure sealing, the flange connection of pipe-line system is less, needs also exist for
Disconnected long pipe road enters line replacement cleaning（And the more difficult cleaning of certain media or presence residual）, not only long construction period, is also resulted in
The wasting of resources and environmental pollution.Existing duct closing type device and method, it is necessary to be customized, and by tube wall smoothness influenceed compared with
Greatly, pressure-bearing and sealing property are bad, and the blowing pressure is not high, and radial compression power is not high, easily occur seepage, and temperature influences during welding
It is larger, it is easily broken, no insurance prior-warning device, potential safety hazard easily occurs during welding.Other tubular service closure not only need
Specialty customization, and equipment is complicated.Field pipework specification is more, and customization trouble, complex operation, construction period is longer, and welds
Inflammable and explosive pipeline is dangerous larger without leakage monitoring system.
The content of the invention
The technical problems to be solved in the utility model is to provide the apparatus for examination and repair of in-service inflammable and explosive pipeline, at least up to carries
High inflammable and explosive pipe plugging tightness and the purpose for ensureing Welding Safety.
To solve above technical problem, the utility model provides a kind of combination plugging device of in-service inflammable and explosive pipeline,
Including interior closure plate screw rod part, double closure plate cavity parts and covering block sets pipe fitting, described interior closure plate screw rod part includes interior closure inner panel
And screw rod, screw head are fixedly connected on interior closure inner panel center, screw rod tail is provided with fixed part；Described double closure plate cavity parts
Including interior closure outside plate, outer closure inner panel and cavity sleeve pipe, described covering block sets pipe fitting include outer closure outside plate, outer tube sleeve and
Covering block sets pipe fitting backing plate, cavity sleeve pipe are set in outside screw rod, interior closure outside plate, outer closure inner panel, outer closure outside plate and outer
Closure sleeve part backing plate center is provided with through hole, and cavity sleeve pipe sequentially passes through above-mentioned interior closure outside plate, outer closure inner panel, outer closure
Outside plate and covering block sets pipe fitting backing plate, wherein, interior plugging plate outside plate and outer plugging plate inner panel are fixedly connected with cavity sleeve pipe, covering
Closure plate outside plate coordinates with cavity shell clearance；Described cavity sleeve pipe is fixedly connected with interior closure outside plate close to screw head one end,
The first rubber gasket for being set in screw rod is provided between interior closure outside plate and interior closure inner panel, it is outer to block outside inner panel and outer closure
The second rubber gasket for being set in cavity sleeve pipe is provided between plate, outer tube sleeve both ends block outside plate and covering block sets with outer respectively
Pipe fitting backing plate connects and is set in cavity jacket exterior, is provided between the cavity sleeve pipe other end and covering block sets pipe fitting backing plate and spiral shell
First feed nut of bar threaded connection, covering block sets pipe fitting backing plate outside are provided with the second feeding spiral shell being connected with screw flight
Mother, interior closure outside plate, outer closure inner panel and inner-walls of duct form closing space, are communicated with connecting tube with the closing space, connect
Pipe connects nitrogen replaceable equipment and pressure gauge or flammable explosive gas detector.
Further, described connecting tube includes the first connecting tube and the second connecting tube, and any connecting tube includes connecting
Inner chamber communicating pipe and extension tube attached, outer closure outside plate, outer closure inner panel, on the second rubber gasket and covering block sets pipe fitting backing plate
It is provided with the through hole through the inner chamber communicating pipe and extension tube attached.
Further, described interior closure inner panel, interior closure outside plate, outer closure inner panel and outer closure outside plate are using circle
Boss structure, the first described rubber gasket and the second rubber gasket are placed between the boss.
Further, described screw rod tail fixed part is the Corner Strapped head for spanner mounting board.
The utility model device can effectively improve inflammable and explosive pipe plugging tightness and Welding Safety, dismounting side after use
Just, simplify construction procedure, reduce construction cost, improve security, avoid long pipeline and with equipment welding connecting tube
The cleaning in road and extensive nitrogen displacement, the repair welds of relocating of the pipe-line system being welded to connect with tank body or equipment avoid residual
Risk is welded caused by oil cleaning is not clean.
Brief description of the drawings
Fig. 1 is interior closure screw rod part.
Fig. 2 is the schematic diagram after the double closure plate cavity parts of assembling and the first rubber gasket.
Fig. 3 is to assemble the schematic diagram after the first feeding bolt.
Fig. 4 is to assemble the schematic diagram after outer lug boss closure sleeve part and the second heat resistant rubber sealing gasket
Fig. 5 is the schematic diagram after the completion of plugging device assembling described in the utility model.
Fig. 6 the utility model devices are passed through piping schematic.
In figure, closure inner panel in 1-, 2- screw rods, 3- fixed parts, 4- is interior to block outside plate, and inner panel, 6- cavity sets are blocked outside 5-
Pipe, 7- block outside plate, 8- outer tube sleeves, 9- covering block sets pipe fitting backing plates, the rubber gaskets of 10- first, the rubber seals of 11- second outside
Pad, the feed nuts of 12- first, the feed nuts of 13- second, 14- inner chambers communicating pipe, 15- extension tube attacheds.
Embodiment
The problem of for existing duct closing type device and method pressure-bearing and poor sealing performance, easily generation seepage.This reality
With the apparatus for examination and repair of the in-service inflammable and explosive pipeline provided in a kind of new typical embodiment, including interior closure plate screw rod part,
Double closure plate cavity part and covering block sets pipe fittings.
With reference to figure 1, described interior closure plate screw rod part includes interior closure inner panel 1 and screw rod 2, the head of screw rod 2 are fixedly connected on
Interior closure inner panel 1 center, the afterbody of screw rod 2 are provided with fixed part 3.The diameter of interior closure inner panel 1 is slightly less than internal diameter of the pipeline；On screw rod 2
Screw thread preferably uses crin, to ensure crushing strength, occurs without stripped thread wire drawing phenomenon；The center of interior closure inner panel 1 and screw rod 2
End surface center is overlapping, is fixed with the vertical welding of screw rod 2.
Described double closure plate cavity parts include interior closure outside plate 4, outer closure inner panel 5 and cavity sleeve pipe 6, described outer closure
Sleeve part includes outer closure outside plate 7, outer tube sleeve 8 and covering block sets pipe fitting backing plate 9.
The internal diameter of cavity sleeve pipe 6 is slightly larger than screw rod 2, and with reference to figure 2, cavity sleeve pipe 6 is set in outside screw rod 2, interior closure outside plate
4th, outer closure inner panel 5, outer closure outside plate 7 and the center of covering block sets pipe fitting backing plate 9 are provided with through hole, and cavity sleeve pipe 6 sequentially passes through
Above-mentioned interior closure outside plate 4, outer closure inner panel 5, outer closure outside plate 7 and covering block sets pipe fitting backing plate 9, wherein, interior plugging plate outside plate 4
It is fixedly connected with outer plugging plate inner panel 5 with cavity sleeve pipe 6, interior closure outside plate 4 and the outer closure center drilling diameter of inner panel 5 and cavity
The external diameter of sleeve pipe 6 is equal, and is welded through cavity sleeve pipe 6, and outer plugging plate outside plate 7 coordinates with the gap of cavity sleeve pipe 6.
Wherein, it is fixedly connected with interior closure outside plate close to the head one end of screw rod 2 with reference to figure 2 and Fig. 4, described cavity sleeve pipe 6
4, it is provided with the first rubber gasket 10 for being set in screw rod 2 between interior closure outside plate 4 and interior closure inner panel 1.It is outer closure inner panel 5 with
The second rubber gasket 11 for being set in cavity sleeve pipe 6 is provided between outer closure outside plate 7.The rubber gasket is preferably using resistance to
Hot rubber gasket, with heat resisting temperature height, good toughness, it is resistance to press, the rubber that thickness is big is cut out, cutting out edge should be neat, to protect
Extrusion expansion is demonstrate,proved in the tightness on tube wall.
With reference to figure 3 and Fig. 5, the both ends of outer tube sleeve 8 are connected and covered with outer closure outside plate 7 and covering block sets pipe fitting backing plate 9 respectively
Outside cavity sleeve pipe 6, cavity sleeve pipe 6 between the other end and covering block sets pipe fitting backing plate 9 of screw rod tail be provided with
The first feed nut 12 that screw rod 2 is threadedly coupled, the outside of covering block sets pipe fitting backing plate 9 are provided with second be threadedly coupled with screw rod 2
Feed nut 13.The internal diameter of outer tube 8 is vertical with the center of cavity sleeve pipe 6 with axial centre, and can pass through cavity sleeve pipe 6 and inner chamber
Communicating pipe is set.The diameter hole equal with the external diameter of outer tube 8 is opened at outer closure outside plate 7 center, and the one end of outer tube 8 is welded after passing through hole
Extremely.Covering block sets pipe fitting backing plate 9 is circle, and diameter is more than the external diameter of outer tube 8, and center drilling diameter is slightly larger than the external diameter of screw rod 2, other
Side is provided with aperture and is used for passing for extension tube attached again.The screw thread of feed nut matches with the screw thread of screw rod 2, and nut outside dimension should be able to push up
Firmly cavity sleeve pipe 6 and the feeding of covering block sets pipe fitting backing plate 9 are defined, but can not influence passing for extension tube attached.
With reference to figure 6, interior closure outside plate 4, outer closure inner panel 5 form closing space with inner-walls of duct, connect with the closing space
It is connected with connecting tube.Connecting tube connects nitrogen replaceable equipment and pressure gauge or flammable explosive gas detector.Nitrogen replaceable equipment
Nitrogen is provided to replace the gas in cavity, and carries out the detection of pressure.Flammable explosive gas liquid-detecting is used for cavity
Flammable explosive gas seepage continues to monitor after the completion of nitrogen displacement.Further, it is also possible to body heat sink and temperature is set to examine
Device is surveyed, body heat sink is used to reduce temperature during pipeline welding, monitoring pipe when device for detecting temperature then is used to weld
The elevated real-time condition of channel temp.
In a preferred embodiment, described connecting tube includes the first connecting tube and the second connecting tube, with reference to figure 5, appoints
One connecting tube includes attachable inner chamber communicating pipe 14 and extension tube attached 15, outer to block outside plate 7, outer closure inner panel 5, and the second rubber is close
The through hole through the inner chamber communicating pipe 14 and extension tube attached 15 is provided with packing 11 and covering block sets pipe fitting backing plate.Outer closure inner panel
Cavity sleeve pipe 6 of trying one's best on 5 opens two through holes, 2 inner chamber communicating pipes 14 connects interior closure outside plate 4 through outer closure inner panel 5
With the cavity of outer closure inner panel 5 and inner-walls of duct composition, junction is welded guarantee cavity airtight.
In a preferred embodiment, described interior closure inner panel 1, interior closure outside plate 4, outer closure inner panel 5 and outer closure
Outside plate 7 uses round boss structure, and the first described rubber gasket 10 and the second rubber gasket 11 are placed in described convex
Between platform.Boss structure is advantageous to extrude above-mentioned rubber gasket to duct wall, forms excellent sealing.Interior closure inner panel 1
Boss face center is overlapping with the end face center of screw rod 2, with the vertical welding of screw rod 2.Interior closure outside plate 4 and the outer closure boss of inner panel 5 are equal
Towards outside cavity.
Preferably, it is the Corner Strapped head for spanner mounting board with reference to figure 1, the described afterbody fixed part 3 of screw rod 2, is used for
The instrument mounting board such as spanner, its circumscribed circle are less than the external diameter of screw rod 2.Four angle head glands can weld with screw rod tail, also can be in spiral shell
Corner Strapped head is directly processed on bar 2.
Inner panel is vertical with screw rod fixes for interior closure, and interior plugging plate outside plate, outer plugging plate inner panel and outer plugging plate outside plate
The perpendicularity with tube wall can be ensured after assembling, above-mentioned part will not tilt, and ensure that closing space has good sealing.
Corresponding part is fastened using feeding bolt substep, first, can reach the pretightning force of requirement, and two can be adjusted respectively
The pretightning force of individual rubber gasket, two rubber gaskets are made to can reach seal request.Secondly as be axial force distribution, can
Avoid the rubber gasket damage caused by rubber gasket rotates.
It can be produced in addition, caused heat can cause the volatilization of the inflammable and explosive medium of gas expansion in welding, during gas expansion
The raw thrust to each part.If two plates are not fixed, in the case where blocking pipe has gas pressure, overpressure can cause to seal
The axial displacement of stifled part, can build-up of pressure reaction it is inaccurate, can not judge whether to reveal by the way that pressure is constant.Embodiment
The interior closure outside plate of middle offer and outer closure inner panel with cavity sleeve pipe are to be fixedly connected, therefore do not have axial position between them
Move, can avoid producing above mentioned problem.
Exemplified by repairing diesel pipeline, the utility model number of assembling steps and operating method are as follows：
（1）First extract or turn off oil plant in storage tank and pipeline out valve, cut off the pipeline to be changed, and it is residual to clear up pipeline opening
Oil and residue.Preferably, in this step, water cooling either water knife or cutting ring cutter adds water at a slow speed is added with cutting machine at a slow speed
Cooling is cut off.
The generation of spark and electrostatic and the rise of temperature are prevented, carries out the measure of destaticing if necessary, prevents diesel oil from leaking
Deng safety measure；Before closure, the cleanings such as the Residual oil in pipeline opening 100mm-800mm and the residue of inside pipe wall are done as needed
Only, and with cleaning agent clean out.
（2）Interior closure plate screw rod part is placed in 100mm-800mm in pipeline, the interior closure end face of inner panel 1 and pipeline section are concentric
Vertically, screw rod 2 and pipeline are radial parallel（Fig. 1）, the first rubber gasket 10 and double closure plate cavity parts are sequentially passed through into screw rod（Figure
2）, when contacting interior closure inner panel 1 to the first rubber gasket 10, with the afterbody fixed part 3 of instrument standing screw 2, pass through stubborn first
Feed nut 12 makes the extrusion expansion of the first rubber gasket 10 be anchored on inner-walls of duct（Fig. 3）, first layer closure completion；
（3）With reference to figure 4 and Fig. 5, successively by the second rubber gasket 11, outer closure outside plate 7, outer tube 8 and covering block sets
Pipe fitting backing plate 9 passes through screw rod 2 and cavity sleeve pipe 6, when contacting outer closure inner panel 5 to the second rubber gasket 11, is fixed with instrument
The afterbody fixed part 3 of screw rod 2, the extrusion expansion of the second rubber blanket 11 is set to be anchored on inner-walls of duct by twisting the second feed nut 13, and
Two connecting tubes are assembled, second layer closure is completed；
（4）One extension tube attached 15 is connected into nitrogen cylinder and carries out nitrogen displacement, nitrogen cylinder outlet has with a pressure gauge,
Pressure change is observed during displacement.After the completion of nitrogen displacement, by another extension tube attached 15 connect another pressure gauge detection pressure or
Flammable explosive gas detector, for detecting whether having leakage or whether having flammable explosive gas residual, after confirming safety, start
Weld job.
Nitrogen displacement is to replace the inflammable and explosive dielectric gas in closed cavity, and two pressure gauges are then in order to more accurate
The accuracy of the stabilization of true reflection pressure value, it is easier to see whether to leak.Observing pressure during nitrogen displacement can be according to pressure
Power judges the degree changed and whether there is flammable explosive gas in cavity, it is often more important that nitrogen in cavity is kept after the completion of displacement
Pressure stability can react in certain value not to be revealed.
After nitrogen displacement, to be detected to whetheing there is leakage.Pressure gauge and flammable explosive gas can be used only during detection
One kind in detector, can also pressure gauge and flammable explosive gas detector all use.
In the case of using only pressure gauge, after nitrogen displacement, an extension tube attached 15 is still connected with nitrogen cylinder, outside another
Adapter 15 connects pressure gauge, after reaching steady pressure value, closes nitrogen, pressurize, shows no leakage if not occurring being depressured.
In the case of using only flammable explosive gas detector, after nitrogen displacement, an extension tube attached 15 still with nitrogen cylinder
Connection, keeps the micro- opening of nitrogen cylinder, and another extension tube attached 15 connects the inflammable easily quick-fried detector of gas, flammable explosive gas detection
Miniature asepwirator pump is carried on instrument, if testing result shows no flammable explosive gas, next step can be carried out, if testing result shows
Show there is flammable explosive gas in closed cavity, then show have leakage or nitrogen displacement not thorough.
In the case of pressure gauge and all uses of flammable explosive gas detector, after nitrogen displacement, an extension tube attached 15 is still
It is connected with nitrogen cylinder, another extension tube attached 15 connection pressure gauge, the extension tube attached after pressure stabilisation that will be switched off connecing pressure gauge, and will
The extension tube attached is connected with flammable explosive gas detector continues the inflammable and explosive oil gas of dynamic detection analysis；After confirming safety, open
Beginning weld job.
When starting weld job, gone out in pipeline on lay absorbent cloth and cooling of watering, with temperature-measuring gun, thermocouple to pipe
Channel temp is monitored, and temperature is too high or gas detecting instrument alarm then stops operation.
The utility model apparatus structure is simple, easy to operate, can effectively improve inflammable and explosive pipe plugging tightness and
Welding Safety, it can also be simplified to one layer of plugging device in common pipe closure and use, can to the Welding Safety of inflammable and explosive pipeline
By practicality.
Claims (4)
- A kind of 1. apparatus for examination and repair of in-service inflammable and explosive pipeline, it is characterised in that：Including interior closure plate screw rod part, double closure plate cavity parts With covering block sets pipe fitting,Described interior closure plate screw rod part includes interior closure inner panel（1）And screw rod（2）, screw rod（2）Head is fixedly connected on interior closure Inner panel（1）Center, screw rod（2）Afterbody is provided with fixed part（3）；Described double closure plate cavity parts include interior closure outside plate（4）, outer closure inner panel（5）With cavity sleeve pipe（6）, described covering Block sets pipe fitting includes outer closure outside plate（7）, outer tube sleeve（8）With covering block sets pipe fitting backing plate（9）,Cavity sleeve pipe（6）It is set in screw rod（2）Outside, interior closure outside plate（4）, outer closure inner panel（5）, outer closure outside plate（7）With Covering block sets pipe fitting backing plate（9）Center is provided with through hole, cavity sleeve pipe（6）Sequentially pass through above-mentioned interior closure outside plate（4）, outer closure Inner panel（5）, outer closure outside plate（7）With covering block sets pipe fitting backing plate（9）, wherein, interior plugging plate outside plate（4）With outer closure inner panel （5）With cavity sleeve pipe（6）It is fixedly connected, outer closure outside plate（7）With cavity sleeve pipe（6）Gap coordinates；Described cavity sleeve pipe（6）Close to screw rod（2）Head one end is fixedly connected with interior closure outside plate（4）, interior closure outside plate（4）With Interior closure inner panel（1）Between be provided be set in screw rod（2）The first rubber gasket（10）, outer closure inner panel（5）With outer closure Outside plate（7）Between be provided be set in cavity sleeve pipe（6）The second rubber gasket（11）,Outer tube sleeve（8）Both ends respectively with outer closure outside plate（7）With covering block sets pipe fitting backing plate（9）Connect and be set in cavity sleeve pipe （6）Outside, cavity sleeve pipe（6）The other end and covering block sets pipe fitting backing plate（9）Between be provided with and screw rod（2）The first of threaded connection Feed nut（12）, covering block sets pipe fitting backing plate（9）Outside is provided with and screw rod（2）Second feed nut of threaded connection（13）,Interior closure outside plate（4）, outer closure inner panel（5）Closing space is formed with inner-walls of duct, is communicated with and is connected with the closing space Pipe, connecting tube connection nitrogen replaceable equipment and pressure gauge or flammable explosive gas detector.
- 2. the apparatus for examination and repair of in-service inflammable and explosive pipeline according to claim 1, it is characterised in that：Described connecting tube bag The first connecting tube and the second connecting tube are included, any connecting tube includes attachable inner chamber communicating pipe（14）And extension tube attached（15）, outside Block outside plate（7）, outer closure inner panel（5）, the second rubber gasket（11）It is provided with covering block sets pipe fitting backing plate through described Inner chamber communicating pipe（14）And extension tube attached（15）Through hole.
- 3. the apparatus for examination and repair of in-service inflammable and explosive pipeline according to claim 2, it is characterised in that：In described interior closure Plate（1）, interior closure outside plate（4）, outer closure inner panel（5）With outer closure outside plate（7）Use round boss structure, described first Rubber gasket（10）With the second rubber gasket（11）It is placed between the boss.
- 4. the apparatus for examination and repair of in-service inflammable and explosive pipeline according to claim 3, it is characterised in that：Described screw rod（2） Afterbody fixed part（3）It is the Corner Strapped head for spanner mounting board.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720789948.9U CN206875034U (en) | 2017-07-03 | 2017-07-03 | The apparatus for examination and repair of in-service inflammable and explosive pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720789948.9U CN206875034U (en) | 2017-07-03 | 2017-07-03 | The apparatus for examination and repair of in-service inflammable and explosive pipeline |
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| CN206875034U true CN206875034U (en) | 2018-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344126A (en) * | 2019-08-08 | 2021-02-09 | 中国石油天然气股份有限公司 | Pipeline welding plugging device |
-
2017
- 2017-07-03 CN CN201720789948.9U patent/CN206875034U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344126A (en) * | 2019-08-08 | 2021-02-09 | 中国石油天然气股份有限公司 | Pipeline welding plugging device |
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