CN110802257B - Pressurized perforating device for in-use pipeline, plugging device and construction method thereof - Google Patents
Pressurized perforating device for in-use pipeline, plugging device and construction method thereof Download PDFInfo
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- CN110802257B CN110802257B CN201911172742.1A CN201911172742A CN110802257B CN 110802257 B CN110802257 B CN 110802257B CN 201911172742 A CN201911172742 A CN 201911172742A CN 110802257 B CN110802257 B CN 110802257B
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- annular sealing
- pressure
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- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 239000000565 sealant Substances 0.000 claims abstract description 24
- 239000004567 concrete Substances 0.000 claims abstract description 21
- 238000005498 polishing Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000010079 rubber tapping Methods 0.000 claims description 28
- 238000005553 drilling Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
- F16L41/06—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a hole opening/plugging device under pressure for a pipeline, wherein sealant is arranged between a straight-through part and the pipeline of a three-way clamp, an annular sealing strip is arranged between a straight-through port and the pipeline, an annular sealing strip is arranged between a joint of the straight-through part and a bypass and the pipeline, the annular sealing strip at the joint of the straight-through port is vertically arranged, the annular sealing strip at the joint of the straight-through part and the bypass is transversely arranged, the annular sealing strip is positioned at the outer side of the sealant, and concrete is coated outside the three-way clamp. The construction method comprises the steps of cleaning and polishing the outer wall of a pipeline operation point, uniformly smearing sealant in a pipeline polishing area, installing and fixing a three-way clamp in the sealant smearing area, embedding annular sealing strips at three ports of the three-way clamp, and pouring concrete sealing piers outside the three-way clamp. The invention adopts the sealing reinforcement technology of combining sealant and concrete to ensure the installation tightness and stability of the clamp.
Description
Technical Field
The invention relates to the technical field of pipeline pressurized tapping, in particular to an on-line pipeline pressurized tapping device, a plugging device and a construction method thereof.
Background
In a large number of urban construction, in order to meet construction requirements, temporary transition and modification are needed to be carried out on the original pipelines in the construction area, and after construction is finished, the pipelines are built in situ again. Since there are running and in-use pipelines, such as water supply pipelines, etc., in the pipeline to be relocated, normal water demand must be ensured during the relocation.
The pipeline pressurized perforating and plugging refers to a technology for machining a circular hole on an operation pipeline in a mechanical cutting mode for connecting a branch pipe or plugging the operation pipeline in a closed state, and is mainly applied to industries such as petroleum, chemical industry, tap water, natural gas and the like. When the branch pipe is needed to be additionally arranged on the pipeline, or the pipeline needs to be rerouted, or leakage is caused by leakage or artificial damage due to corrosion and perforation, the pipeline can be completed by adopting the technology of opening and plugging under pressure, so that normal conveying of the pipeline is not affected, and the connection work of new and old pipelines can be ensured to be completed safely, efficiently and environmentally-friendly.
In prior art, the tapping and the shutoff with the pipeline under pressure relate to equipment such as tapping machine, shutoff machine, tapping machine, shutoff machine pass through T type pipe fitting and are being connected with the pipeline in use, but T type pipe fitting is relatively poor with the leakproofness of being with non-steel pipeline, easily causes to reveal, and its structural design is unreasonable, does not relate to the water supply pipeline of nodular cast iron material simultaneously and makes the pertinence optimization, and the security is relatively poor.
Disclosure of Invention
The invention aims to solve the problems and provide an opening and plugging device with pressure for an in-use pipeline and a construction method thereof.
In order to achieve the above-mentioned purpose, the present disclosure provides an in-use pipeline under-pressure tapping/plugging device, including three way clamp, the sandwich valve, the even case and with the even case cooperation installation tapping machine/plugging machine, three way clamp centre gripping is fixed on straight pipeline, three way clamp includes through and bypass, be provided with the sealant between through and the pipeline, be provided with annular sealing strip between through port and the pipeline, be provided with annular sealing strip between through and the bypass junction and the pipeline, the annular sealing strip of through port department sets up vertically, the annular sealing strip of through and bypass junction transversely sets up, annular sealing strip is located the sealant outside, three way clamp outside cladding ground is provided with the concrete, form the concrete seal mound.
The construction method for the pressurized opening and the plugging of the in-use pipeline is applied to the pressurized opening/plugging device of the in-use pipeline, and comprises the following steps:
Selecting an operation point, cleaning and polishing the outer wall of the pipeline operation point, uniformly coating sealant on a pipeline polishing area, installing and fixing a three-way clamp in the sealant coating area, embedding annular sealing strips from three ports of the three-way clamp, enabling the annular sealing strips to be in sealing connection with the pipeline, pouring concrete sealing piers outside the three-way clamp, enabling the three-way clamp to be fixed, and realizing permanent sealing with the pipeline;
Installing a clamping plate valve and a tapping machine, drilling after pressure test is completed, closing the clamping plate valve after drilling is completed, opening a stop valve on a joint header, discharging a flat-pressure medium, and disassembling the tapping machine;
Installing a plugging machine and a connecting box, opening a clamping plate valve, closing a balance valve, starting the plugging machine, and ensuring continuous plugging of a pipeline.
The invention has the beneficial effects that:
The invention adopts the sealing reinforcement technology of combining sealant and concrete to ensure the installation tightness and stability of the clamp.
Based on the technical scheme, the invention can also be improved as follows:
preferably, grooves are transversely arranged at the joints of the through ports and the through and the bypass, and the annular sealing strips are connected in the grooves in a sealing mode.
Preferably, after the annular sealing strips are embedded from three ports of the three-way clamp, sealant is filled into the three ports.
Preferably, the wall thickness of the pipeline in the pipeline polishing area is measured, the idle stroke distance of the drilling tool is calculated after the clamping plate valve and the tapping machine are installed, the full stroke distance of the cut pipeline is calculated based on the measured wall thickness of the pipeline, and when the drill rod of the tapping machine is fed to the sum of the idle stroke distance of the drilling tool and the full stroke distance of the cut pipeline and no intermittent cutting sound exists, the pipeline tapping is completed.
Preferably, the operation point is selected on the straight pipe section, the welding line of the pipeline is avoided, the roundness error of the pipeline is not more than 1% of the outer diameter of the pipeline, and the flatness of the surface of the pipeline is not more than 0.5mm after the pipeline is cleaned and polished.
Preferably, the application thickness of the sealant is not less than the gap size between the clamp and the pipe wall.
Preferably, the embedded depth of the annular sealing strip is not less than 10mm.
Preferably, the top of the concrete sealing pier is 10 cm-15 cm away from the bottom of the bypass flange plate of the three-way clamp, and the thickness of the concrete sealing pier is not less than 15cm.
Preferably, the intensity test pressure of the pressure test is 1.25 times of the working pressure of the pipeline at the working point, the tightness test pressure of the pressure test is carried out according to the working pressure of the pipeline at the working point, the intensity test is stabilized for 1h, and the tightness test is stabilized for 4h.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a plan view of the installation of the tapping machine according to the present invention;
FIG. 2 is a cross-sectional view A-A shown in FIG. 1;
FIG. 3 is a B-B cross-sectional view shown in FIG. 1;
FIG. 4 is a C-C cross-sectional view shown in FIG. 3;
FIG. 5 is a plan view of the installation of the plugging machine according to the present invention;
FIG. 6 is a D-D sectional view shown in FIG. 5;
FIG. 7 is an E-E cross-sectional view shown in FIG. 5;
The plugging machine is provided with an E-E cross section;
fig. 8 is a cross-sectional view of F-F shown in fig. 7.
Description of the reference numerals
The device comprises a 1-tee clamp, a 2-side branch pipeline, a 3-concrete sealing pier, a 4-bolt, a 5-tapping machine main shaft, a 6-tapping cylindrical cutter, a 7-clamping plate valve, an 8-transmission rod, a 9-rocker, a 10-valve plate, 11-sealing glue, a 12-annular sealing strip, a 13-tapping machine, a 14-plugging machine, a 15-plugging machine main shaft, 16-plugging heads and 17-grooves.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In the present disclosure, unless otherwise indicated, terms such as "upper" and "lower" are generally defined based on the orientation or positional relationship shown in the drawings, and specifically refer to the orientation of the drawing shown in fig. 1 in combination with the positional relationship of the corresponding components in other drawings.
As shown in fig. 1 and 5, the on-line pipeline pressurized perforating/plugging device comprises a three-way clamp 1, a clamping plate valve 7, a connecting box and a perforating machine 13/plugging machine 14 which is matched with the connecting box, wherein the three-way clamp 1 is clamped and fixed on a straight pipeline, the three-way clamp 1 comprises a straight-through part and a bypass part, a sealant 11 is arranged between the straight-through part and the pipeline, an annular sealing strip 12 is arranged between a straight-through port and the pipeline, an annular sealing strip 12 is arranged between a straight-through part and a bypass joint and the pipeline, the annular sealing strip 12 at the straight-through port is vertically arranged, the annular sealing strip 12 at the straight-through part and the bypass joint is transversely arranged, the annular sealing strip 12 is positioned outside the sealant 11, and concrete is coated outside the three-way clamp 1 to form a concrete sealing pier 3.
As shown in fig. 3, grooves 17 are transversely arranged at the joints of the through ports and the through and the bypass, and the annular sealing strip 12 is connected in the grooves 17 in a sealing manner.
The invention relates to a construction method for opening and plugging an in-use pipeline under pressure, which is applied to the in-use pipeline under pressure opening/plugging device and comprises the following steps:
And (3) mounting a three-way clamp 1:
Selecting an operation point, cleaning and polishing the outer wall of the pipeline operation point, uniformly smearing sealant 11 on the pipeline polishing area, installing and fixing a three-way clamp 1 on the area smeared with the sealant 11, embedding an annular sealing strip 12 from three ports of the three-way clamp 1, enabling the annular sealing strip 12 to be in sealing connection with the pipeline, then filling the sealant 11 inwards, pouring a concrete sealing pier 3 outside the three-way clamp 1, enabling the three-way clamp 1 to be fixed, and realizing permanent sealing with the pipeline.
Specifically, the working points are determined, the opening and plugging working points are selected on the straight pipe section, the wall thickness of the pipeline is required to be uniform, the welding line of the pipeline is avoided as much as possible, and the roundness error of the pipeline is not required to exceed 1% of the outer diameter of the pipeline. The distance between the pipe fitting and the bypass pipeline 2 is at least 2.5 times longer than the length of the three-way clamp 1.
The polished area lines are drawn with marker strokes, typically 50mm extending toward each end of the fixture. The outer wall of the pipe is polished by using a handheld steel wire polisher and a grinding wheel polisher, the pipe wall is cleaned by using clear water and an oil stain cleaning agent, the anti-corrosion layer, the oil stain and primer on the surface of the pipe and the bulge and burr part of the outer wall are removed, and the cleaning of the pipe wall is ensured. After the pipeline is cleaned and polished, the flatness of the surface of the pipeline is not more than 0.5mm. And measuring the wall thickness of the pipeline by using an ETG-100 type thickness gauge on site, and determining construction parameters.
And uniformly coating sealant 11 on the pipeline polishing area, wherein the sealant 11 is pasty organic silicon material, and the coating thickness is not less than the gap size between the pipe fitting and the pipe wall. Then, the three-way clamp 1 with the upper and lower petals is pre-installed in the smearing area, the three-way clamp 1 with the upper and lower petals is temporarily fixed by bolts 4, and then the clamp is welded into a whole. The annular sealing strip 12 is embedded from the pipe fitting port to prevent the sealing glue 11 from overflowing, the annular sealing strip 12 is made of rubber material, the embedding depth L5 of the sealing strip is not less than 10mm, the winding number of turns is not less than 2, and the sealing glue 11 is filled with a glue gun.
And finally, pouring a concrete sealing pier 3 outside the tee clamp 1 for permanent sealing and pipe fitting fixing. The top of the concrete sealing pier 3 is 10 cm-15 cm away from the bottom of the bypass flange of the three-way clamp 1, so that the gate valve bolt 4 can be conveniently installed and detached, and the thickness of the concrete sealing pier 3 is not less than 15cm.
As shown in fig. 4, the aperturing stage:
The clamping plate valve 7 and the tapping machine 13 are installed, the drill idle stroke distance Z1 is calculated, and the cut-off pipe full stroke distance Z2 is calculated based on the measured pipe wall thickness. After the pressure test is completed, drilling operation is performed, after the drilling operation is completed, the clamping plate valve 7 is closed, the stop valve on the joint header is opened, the flat pressure medium is discharged, and the tapping machine 13 is disassembled.
Specifically, after the fixture is installed, the clamping plate valve 7 and the tapping machine 13 are installed, and the pressure test is completed. The clamping plate valve 7 is hoisted in a closed state, and the coaxiality of the inner hole of the clamping plate valve 7 and the clamp is measured after the clamping plate valve 7 is installed and controlled within phi 1 mm. When the tapping machine 13 is installed, the tapping machine 13 barrel knife 6 is concentric with the main shaft 5 and is controlled within phi lmm. The intensity test pressure of the pressure test is 1.25 times of the pipeline working pressure of the operation point, the tightness test pressure of the pressure test is carried out according to the pipeline working pressure of the operation point, the intensity test pressure is stabilized for 1h, and the tightness test pressure is stabilized for 4h.
After all work is ready, the rocker 9 of the clamping plate valve 7 is rocked, the valve plate 10 of the clamping plate valve 7 is retracted through the transmission rod 8, and the clamping plate valve 7 is opened to start drilling. And (3) cutting and drilling at a low rotating speed, and ensuring the rotating speed to be 5-6 r/min. When the drill rod is fed to the Z2 size without intermittent cutting sound, the pipeline cutting work is completed, the power supply is cut off, the rocker 9 is reversely rocked, the valve plate 10 is extended out through the transmission rod 8 to close the sandwich valve 7, the stop valve on the connecting box is opened, the flat-pressure medium is discharged, and the tapping machine 13 is disassembled.
As shown in fig. 5-8, the occlusion phase:
Installing the plugging machine 14 and the connecting box, opening the clamping plate valve 7, closing the balance valve, starting the plugging machine 14, and ensuring continuous plugging of the pipeline.
Specifically, the plugging machine 14 and the plugging connecting box are assembled together according to the required specification, various data when the plugging is in place are measured and calculated, the plugging direction is determined, and the inner side of the plugging plate faces the water supply direction. The assembled machine is installed on a clamping plate valve 7, after the plugging direction is determined to be correct, the clamping plate valve 7 is opened, a balance valve is closed, a main shaft 5 of the plugging device is manually or hydraulically rotated, the plugging device is positioned and rotated to rotate the main shaft 5 of the plugging device for 5.5-6 circles through mechanical rotation, the large expansion force is prevented from being generated, the cast iron pipe is prevented from being crushed, the main shaft 5 of the plugging device is locked, and the continuous plugging of a pipeline is ensured.
Removing the blocking:
after the pipeline related operation is completed, the pipeline is unsealed. Firstly, connecting and opening a pressure balance valve, reversely rotating a main shaft 15 of the plugging machine 14, contracting a plugging head 16 of the plugging machine 14, lifting the plugging head 16 into a connecting box after the pressure in the pipelines at two ends of the plugging machine 14 is balanced, and closing the clamping plate valve 7. Then the shut-off valve on the connecting box is opened, the flat medium is discharged, the plugging machine 14 is disassembled and the plugging head 16 is taken out. And then preprocessing the whole section of the cut block taken out by the opening, welding the cut block onto the plug, connecting the plug onto a lower plug device, installing the lower plug device on a sandwich valve 7, rotating a main shaft 5 of the lower plug device to send the plug into the correct position in a flange plate of a pipe fitting after pressing to confirm that no leakage exists, and locking a bolt. And measuring and recording the distance from the upper part of the plugging snap ring groove to the bottom of the open pore combiner, and measuring and recording the distance from the top of the valve to the top of the pipe fitting limiting snap ring. After the plug is plugged down to the position, the limit clamping ring is screwed in according to the number of turns recorded previously. After the plugging is finished, after the quality of the plugging is detected to be qualified, the clamping plate valve 7 and plugging equipment on each pipe fitting are removed, and a blind plate is installed.
Specifically, the whole section of the cut piece taken out from the opening is pretreated, and the diameter of the cut piece after edge cleaning is not smaller than 20 mm. After the plugging is completed, the medium in the combiner is emptied, the relief valve is closed, the pressure is held for three minutes, the pressure gauge is observed for three times continuously, and no pressure rise is qualified.
The on-line pipeline pressurized perforating device, the plugging device and the construction method thereof adopt a sealing and reinforcing technology combining pasty organosilicon sealant 11 with high-strength concrete to ensure the installation tightness and stability of the pipe fitting; the invention reasonably optimizes construction parameters aiming at the physical characteristics of the ductile cast iron pipe and ensures construction safety and quality.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (8)
1. The construction method for the pressurized opening and the plugging of the pipeline is applied to the pressurized opening/plugging device of the pipeline, and is characterized in that:
The device comprises a three-way clamp, a clamping plate valve, a connecting box and a tapping machine/plugging machine matched with the connecting box, wherein the three-way clamp is clamped and fixed on a straight pipeline, and comprises a straight through part and a bypass part, and is characterized in that: the sealing glue is arranged between the straight-through port and the pipeline, an annular sealing strip is arranged between the joint of the straight-through port and the bypass and the pipeline, the annular sealing strip at the joint of the straight-through port is vertically arranged, the annular sealing strip at the joint of the straight-through port and the bypass is transversely arranged, the annular sealing strip is positioned at the outer side of the sealing glue, and concrete is coated outside the three-way clamp to form a concrete sealing pier; grooves are transversely formed in the joints of the straight-through port and the straight-through and bypass, and the annular sealing strips are connected in the grooves in a sealing mode;
the construction method comprises the following steps:
Selecting an operation point, cleaning and polishing the outer wall of the pipeline operation point, uniformly coating sealant on a pipeline polishing area, installing and fixing a three-way clamp in the sealant coating area, embedding annular sealing strips from three ports of the three-way clamp, enabling the annular sealing strips to be in sealing connection with the pipeline, pouring concrete sealing piers outside the three-way clamp, enabling the three-way clamp to be fixed, and realizing permanent sealing with the pipeline;
Installing a clamping plate valve and a tapping machine, drilling after pressure test is completed, closing the clamping plate valve after drilling is completed, opening a stop valve on a joint header, discharging a flat-pressure medium, and disassembling the tapping machine;
Installing a plugging machine and a connecting box, opening a clamping plate valve, closing a balance valve, starting the plugging machine, and ensuring continuous plugging of a pipeline.
2. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: after the annular sealing strips are embedded into the three ports of the three-way clamp, sealant is filled into the three ports.
3. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: measuring the wall thickness of the pipeline in the pipeline polishing area, calculating the idle stroke distance of the drilling tool after the clamping plate valve and the tapping machine are installed, calculating the full stroke distance of the cut-off pipeline based on the measured wall thickness of the pipeline, and finishing the tapping of the pipeline when the drill rod of the tapping machine is fed to the sum of the idle stroke distance of the drilling tool and the full stroke distance of the cut-off pipeline and no intermittent cutting sound exists.
4. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: the operating point is selected on the straight pipe section, the welding line of the pipeline is avoided, the roundness error of the pipeline is not more than 1% of the outer diameter of the pipeline, and the flatness of the surface of the pipeline is not more than 0.5mm after the pipeline is cleaned and polished.
5. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: the coating thickness of the sealant is not smaller than the size of a gap between the clamp and the pipe wall.
6. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: the embedded depth of the annular sealing strip is not less than 10mm.
7. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: the top of the concrete sealing pier is 10 cm-15 cm away from the bottom of the bypass flange plate of the three-way clamp, and the thickness of the concrete sealing pier is not less than 15cm.
8. The construction method for opening and plugging the pressure hole in the pipeline in use according to claim 1, which is characterized in that: the intensity test pressure of the pressure test is 1.25 times of the pipeline working pressure of the operation point, the tightness test pressure of the pressure test is carried out according to the pipeline working pressure of the operation point, the intensity test pressure is stabilized for 1h, and the tightness test pressure is stabilized for 4h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911172742.1A CN110802257B (en) | 2019-11-26 | 2019-11-26 | Pressurized perforating device for in-use pipeline, plugging device and construction method thereof |
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| CN201911172742.1A CN110802257B (en) | 2019-11-26 | 2019-11-26 | Pressurized perforating device for in-use pipeline, plugging device and construction method thereof |
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| CN113752447B (en) * | 2020-06-03 | 2023-03-21 | 中国石油化工股份有限公司 | Device and method for online leak stoppage of valve |
| CN112228633B (en) * | 2020-09-08 | 2021-06-04 | 深圳市杉叶实业有限公司 | Construction method for underwater installation of underwater pressurized tapping operation of submarine pipeline |
| CN112628509A (en) * | 2020-12-16 | 2021-04-09 | 上海能源建设集团有限公司 | Method for preventing iron filings from backflushing in process of drilling and connecting new pipe with pressure in gas high-pressure pipeline |
| CN114192837B (en) * | 2021-12-31 | 2024-02-09 | 广东红海湾发电有限公司 | Isolated high-voltage bypass opening clamp |
| CN114415590B (en) * | 2022-01-19 | 2022-10-14 | 安徽欧泰祺智慧水务科技有限公司 | Remote control method of pipeline punching machine with pressure |
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| CN103016893A (en) * | 2011-09-21 | 2013-04-03 | 中国建筑第七工程局有限公司 | Hot tapping plugging construction method of long natural gas delivery pipeline |
| CN105987253A (en) * | 2015-01-29 | 2016-10-05 | 胡炎兴 | Oil-gas pipeline blocking system and method |
| CN211101722U (en) * | 2019-11-26 | 2020-07-28 | 中国水利水电第十工程局有限公司 | Pipeline under-pressure tapping device and plugging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2007284157B2 (en) * | 2006-08-08 | 2011-01-20 | Shell Internationale Research Maatschappij B.V. | Subsea hot tap systems and methods |
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| US5482403A (en) * | 1993-06-25 | 1996-01-09 | Hail Mary Rubber Company, Inc. | Sewer construction and pipe encasement therefor |
| CN103016893A (en) * | 2011-09-21 | 2013-04-03 | 中国建筑第七工程局有限公司 | Hot tapping plugging construction method of long natural gas delivery pipeline |
| CN105987253A (en) * | 2015-01-29 | 2016-10-05 | 胡炎兴 | Oil-gas pipeline blocking system and method |
| CN211101722U (en) * | 2019-11-26 | 2020-07-28 | 中国水利水电第十工程局有限公司 | Pipeline under-pressure tapping device and plugging device |
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