CN114263805A - Device and method for blocking pipeline under pressure without stopping fire during non-stop transportation - Google Patents
Device and method for blocking pipeline under pressure without stopping fire during non-stop transportation Download PDFInfo
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- CN114263805A CN114263805A CN202111596994.4A CN202111596994A CN114263805A CN 114263805 A CN114263805 A CN 114263805A CN 202111596994 A CN202111596994 A CN 202111596994A CN 114263805 A CN114263805 A CN 114263805A
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Abstract
The invention relates to a device and a method for blocking a pipeline under pressure without stopping fire during continuous transportation. The device includes outer shutoff pipe, the inner seal body, shutoff working barrel and valve, outer shutoff pipe is used for the seal cover to locate the pipeline shutoff point outside, its both sides middle part is coaxial respectively to open has the shutoff hole, the outside of one of them shutoff hole is sealed all around to be equipped with the connecting pipe of perpendicular outer shutoff pipe, the outside of another shutoff hole is sealed all around to be equipped with inside hollow sealed storehouse, the mouth of pipe seal assembly of a valve port and connecting pipe of valve, shutoff working barrel detachable seal assembly is in another mouth of pipe department of valve, the inner seal body is located in the shutoff working barrel, be equipped with the propelling movement structure of being connected with inner seal body one end is dismantled in the shutoff working barrel, the inner seal body outside is equipped with the seal structure with the inner wall sealing connection of pipeline shutoff point. The advantages are that: the whole construction process does not need to be operated under fire and pressure, and the potential safety hazard is reduced.
Description
Technical Field
The invention relates to a pipeline under-pressure plugging technology, in particular to a device and a method for plugging a pipeline under pressure without stopping fire.
Background
The pipeline non-stop conveying pressurized plugging is a pipeline construction and maintenance method which is commonly used for emergency maintenance of a process technology. The existing under-pressure plugging process has two technical short plates: firstly, under-pressure plugging requires that pipe fittings and the like of an under-pressure plugging device prefabricated in advance are welded to a pipeline to be plugged in a welding mode, welding operation is carried out in an oil gas gathering and transportation and flammable and explosive area without stopping production, the risk of ignition and explosion is high, the ignition and explosion are easily caused, and safety accidents are induced. The technology itself has environmental factor limitations. Secondly, the prefabricated part and the pipe body can not be welded under high current in the process of pipeline welding operation without stopping production, the welding quality of the prefabricated part and the pipeline can not be ensured, and the leakage risk exists. The pressure plugging head in the lower pipeline is mostly sealed by rubber, the sealing piece is plastically deformed by manual work, mechanical extrusion or hydraulic power, the pressure plugging is realized, however, in the operation process of the pipeline, the inner wall of the pipeline is irregular due to the influence of the internal structure of the pipeline, the corrosion of materials and the carrying of silt and impurities by the materials, the local sealing is not tight in the pressure sealing process, the pressure plugging is invalid, and the success rate is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for blocking a pipeline without stopping fire and pressing, which effectively overcome the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a device for blocking a pipeline under pressure without stopping fire during continuous transportation comprises an outer blocking pipe, an inner sealing body, a blocking working barrel and a valve, wherein the outer blocking pipe is used for arranging a sealing sleeve outside a blocking point of the pipeline, blocking holes are respectively and coaxially formed in the middle parts of two sides of the outer blocking pipe, a connecting pipe perpendicular to the outer blocking pipe is arranged on the periphery of the outer side of one of the blocking holes in a sealing mode, a hollow sealing bin is arranged on the periphery of the outer side of the other blocking hole in a sealing mode, a valve port of the valve is in sealing assembly with a pipe port of the connecting pipe, the blocking working barrel is detachably and hermetically assembled at the other valve port of the valve, the inner sealing body is arranged in the blocking working barrel, a pushing structure detachably connected with one end of the inner sealing body is arranged in the blocking working barrel, and used for enabling the inner sealing body to pass through the blocking working barrel, The valve channel and the connecting pipe of the valve are pushed to the other end of the valve channel and the connecting pipe and are inserted into the sealing bin in a sealing mode, one end, connected with the pushing structure, of the inner sealing body is connected with one of the sealing holes in a sealing mode, and a sealing structure connected with the inner wall of the pipeline sealing point in a sealing mode is arranged outside the inner sealing body.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, above-mentioned outer shutoff pipe includes that two cross-sections are fan annular semicircle pipe, and the both ends of two above-mentioned semicircle pipes are equipped with the flange limit respectively, and the both ends of two above-mentioned semicircle pipes dock respectively, and the flange limit at the two both ends is laminated each other to it is fixed through bolted connection.
Further, the connecting pipe is a circular pipe, the inner diameter of the connecting pipe is larger than the aperture of the plugging hole, the inner cavity of the sealing bin is a cylindrical cavity which is coaxial with the plugging hole, the inner sealing body is a cylindrical component matched with the inner cavity of the plugging hole, one end of the inner sealing body is provided with a connecting part, the connecting part is detachably connected with the pushing structure, and after the inner sealing body is sealed and inserted into the sealing bin, the connecting part is in sealing contact with the hole edge of one of the plugging holes.
Further, the connecting portion is of a cylindrical structure coaxial with the connecting pipe, a frustum-shaped transition portion is arranged at the connecting portion of the connecting portion and the inner sealing body, a hole inner wall of one of the plugging holes is a frustum surface with gradually increased outer diameter from inside to outside, and after the inner sealing body is sealed and inserted into the sealing bin, the transition portion is attached to the hole inner wall of the plugging hole.
Further, the connecting pipe is provided with a locking structure which is in locking fit with the connecting part.
Furthermore, a locking point is arranged at the side end of the connecting part, a jackscrew hole corresponding to the locking point is arranged on the side wall of the connecting pipe, a jackscrew which is screwed down and abuts against the locking point of the connecting part is assembled in the jackscrew hole, and the jackscrew forms the locking structure.
Further, the valve is a plate valve.
Furthermore, the sealing structure is a flexible sealing sleeve which is sleeved outside the inner sealing body and can be compressed and deformed.
Further, the sealing structure is a longitudinal sealing ring groove which is longitudinally and annularly arranged along the outer surface of the inner sealing body, and the side wall of the connecting pipe is provided with a glue injection port corresponding to the longitudinal sealing ring groove.
Further, the outer surface of the connecting part is circumferentially provided with a circumferential sealing groove along the circumferential direction of the connecting part, and the circumferential sealing groove is communicated with the longitudinal sealing ring groove.
Further, the pushing structure is a strip-shaped pushing rod, the pushing rod penetrates through one end portion of the plugging working barrel, one end of the pushing rod is exposed, and the other end of the pushing rod is detachably connected with the end portion, corresponding to the inner sealing body, of the inner sealing body.
Furthermore, one end of the pressurized plugging working barrel, which is far away from the valve, is integrally formed and provided with a sealing packing chamber, the end part of the packing chamber is opened and is provided with a packing gland, and one end of the push rod penetrates through the packing chamber and the packing gland.
The beneficial effects are that: the whole construction process does not need to be operated under fire and pressure, and the potential safety hazard is reduced.
The method for blocking the pipeline under the condition of no power-off fire and pressure without stopping transportation is also provided and is implemented by the device for blocking the pipeline under the condition of no power-off fire and pressure without stopping transportation according to any one of the claims, and is characterized by comprising the following steps of:
firstly, after confirming a position to be blocked on site, cleaning external attachments of a pipeline anticorrosive coating and a pipeline insulating layer to ensure that a construction part has no impurities or foreign matters;
step two, an outer plugging pipe is hermetically installed outside the pipeline plugging point;
step three, installing a valve and ensuring that the valve is flexible to open and close and good in sealing;
step four, installing a pressurized tapping machine at the other valve port of the valve, then opening the valve, and carrying out pressure test by adopting nitrogen or water to ensure that the pipeline, the outer plugging pipe, the connecting pipe and the valve are well connected and sealed;
step five, tapping under pressure;
step six, after the hole is opened, closing the valve, and dismantling the hole opener with pressure;
seventhly, installing a plugging working barrel at the other valve port of the valve;
step eight, opening a valve, pushing the inner sealing body through the opening by a pushing structure, enabling the inner sealing body to be respectively in sealing connection with the sealing bin and one of the sealing holes, and enabling the sealing structure to seal the inside of the pipeline and keep the inner sealing body fixed;
and step nine, dismantling the valve, and installing a plugging plate at the pipe orifice of the connecting pipe.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the inside cavity of above-mentioned inner seal body, its side are equipped with the drainage mouth of intercommunication its inner chamber, and the one end of above-mentioned inner seal body is equipped with the drainage hole of intercommunication its inner chamber, and this drainage hole department detachable is equipped with the shutoff.
The beneficial effects are that: the construction process is convenient and reasonable, and the plugging under pressure without fire can be effectively realized.
Drawings
FIG. 1 is a schematic structural diagram of the device for blocking a pipeline under pressure without stopping the fire;
FIG. 2 is a schematic structural diagram of an inner sealing body in the device for blocking the pipeline under pressure without stopping the transmission of fire;
fig. 3 is a structural section view of an outer plugging pipe in the device for plugging the pipeline under pressure without stopping the fire.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an outer plugging tube; 2. an inner seal body; 3. plugging the working barrel; 4. a valve; 5. a pushing structure; 6. a locking structure; 11. a connecting pipe; 12. sealing the bin; 31. sealing the packing chamber; 41. a connecting portion; 111. plugging the hole; 112. a semicircular tube; 311. a packing gland; 411. a transition section; 412. a longitudinal sealing ring groove; 413. and (4) annular sealing grooves.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example (b): as shown in fig. 1, 2 and 3, the device for blocking a pipeline under pressure without stopping delivery and stopping fire comprises an outer blocking pipe 1, an inner sealing body 2, a blocking working barrel 3 and a valve 4, wherein the outer blocking pipe 1 is used for being hermetically sealed and arranged outside a pipeline blocking point, the middle parts of two sides of the outer blocking pipe 1 are respectively and coaxially provided with a blocking hole 111, the periphery of the outer side of one of the blocking holes 111 is hermetically provided with a connecting pipe 11 vertical to the outer blocking pipe 1, the periphery of the outer side of the other blocking hole 111 is hermetically provided with a sealing cabin 12 with a hollow inner part, a valve port of the valve 4 is hermetically assembled with a pipe orifice of the connecting pipe 11, the blocking working barrel 3 is detachably and hermetically assembled at the other valve port of the valve 4, the inner sealing body 2 is arranged in the blocking working barrel 3, the blocking working barrel 3 is provided with a pushing structure 5 detachably connected with one end of the sealing body of the inner sealing body 2, the pushing structure 5 is used for pushing the inner sealing body 2 to the other end through the valve channel of the plugging working barrel 3 and the valve 4 and the connecting pipe 11 to be hermetically inserted into the sealing bin 12, and the end of the inner sealing body 2 connected with the pushing structure 5 is hermetically connected with one of the plugging holes 111, and a sealing structure hermetically connected with the inner wall of a pipeline plugging point is arranged outside the inner sealing body 2.
The operation process is as follows:
step one, after confirming the position needing to be blocked on site, cleaning the pipeline (a in the figure) external attachments of an anticorrosive layer and a heat-insulating layer of the pipeline, and ensuring that the construction part has no impurities or foreign matters;
step two, an outer plugging pipe 1 is hermetically installed outside the pipeline plugging point;
step three, installing the valve 4 and ensuring that the valve 4 is flexibly opened and closed and is well sealed;
step four, installing a pressurized tapping machine at the other valve port of the valve 4, then opening the valve 4, and testing pressure by adopting nitrogen or water to ensure that the pipeline, the outer plugging pipe 1, the connecting pipe 11 and the valve 4 are connected and sealed well;
step five, opening a hole under pressure, wherein the hole penetrates through the two plugging holes 111, and the hole diameter of the hole is close to or equal to the inner diameter of the pipeline;
step six, after the hole is opened, closing the valve 4 and removing the hole opener with pressure;
seventhly, installing a plugging working barrel 3 at the other valve port of the valve 4;
step eight, opening the valve 4, pushing the inner sealing body 2 through the opening by the pushing structure 5, enabling the inner sealing body 2 to be respectively in sealing connection with the sealing bin 12 and one of the sealing holes 111, and simultaneously enabling the sealing structure to seal the inside of the pipeline and keep the inner sealing body 2 fixed;
and ninthly, removing the valve 4, and installing a plugging plate at the pipe orifice of the connecting pipe 11.
The whole technical scheme has the following advantages: 1) the device can be prefabricated in advance without moving fire and pressing the plugging device: specifically, the device can be prefabricated in advance by combining with the actual working condition on site, the sealing of the device is matched with the secondary sealing of the injection agent through clearance fit, the matching degree on site is high, and the construction rate is high; 2) the fire-free injection type structure is constructed in the whole process, so that potential safety hazards caused by fire are avoided, and the construction safety risk is low; 3) the sealing reliability is high; 4) the tapping process is different, the traditional pressure plugging tapping requires that all original pipelines are cut off, a sealing body which is newly built by welding pipe fittings welded outside the pipelines and the pipelines is used as a connecting piece, the tapping of the process does not cut off all pipelines, the diameter of the tapping is less than or equal to the inner diameter of the pipelines, the pipelines are not broken integrally, and the phenomenon that the newly built sealing cavity connecting body fails to seal and cause leakage accidents due to the fact that the pipelines stretch out and draw back under the action of the stress of the original pipelines and the pressure of the pipelines after the tapping is ensured. 5) The operation is simple, and the traditional field welding is not needed, and the method is matched with large-scale construction resources such as fire-fighting vehicles and the like. The labor intensity of staff is reduced, the use of social resources is reduced, and the method has good market demand and economic benefit and good social benefit.
In the actual operation in-process, the inside cavity of above-mentioned inner seal body 2, its side is equipped with the drainage mouth (this drainage mouth is faced the inside liquid side that comes of pipeline) of its inner chamber of intercommunication, and the one end of above-mentioned inner seal body 2 is equipped with the drainage hole of its inner chamber of intercommunication, and this drainage hole department detachable is equipped with the shutoff, forms drainage hole, establish drainage route between 2 inner chambers of inner seal body, the drainage mouth, demolishs shutoff working barrel 3 back, and the process pipeline is connected to valve 4 upper end, opens the gate valve and can realize the drainage.
As a preferred embodiment, the outer plugging tube 1 includes two semicircular tubes 112 with sector-shaped cross sections, two ends of the two semicircular tubes 112 are respectively provided with flange edges, two ends of the two semicircular tubes 112 are respectively butted, and the flange edges at the two ends of the two semicircular tubes are mutually attached and fixed by bolts.
In the above embodiment, the outer plugging pipe 1 adopts a split structural design, and is convenient to assemble outside the pipeline, in the installation process, the two semicircular pipes 112 are fixedly connected through flange edges after being respectively wrapped on two sides of the pipeline, the butted flange edges can be sealed in a mode of clamping a sealing ring, and inner walls of two ends of the outer plugging pipe 1 are well sealed with the outer surface of the pipeline in a mode of clamping the sealing ring.
In a preferred embodiment, the connection pipe 11 is a circular pipe, the inner diameter of which is larger than the diameter of the blocking hole 111, the inner cavity of the sealing chamber 12 is a cylindrical cavity coaxially disposed with the blocking hole 111, the inner sealing body 2 is a cylindrical member adapted to the inner cavity of the blocking hole 111, a connection portion 41 is disposed at one end of the inner sealing body 2, the connection portion 41 is detachably connected to the pushing structure 5, and when the inner sealing body 2 is sealingly inserted into the sealing chamber 12, the connection portion 41 sealingly contacts with one of the holes of the blocking hole 111.
In the above embodiment, the sizes of the associated pipes and holes are reasonably designed, so that when the inner sealing body 2 is installed and sealed, good sealing between the inner sealing body and the sealing bin 12 and between the inner sealing body and the sealing hole 111 (at the joint) can be realized.
More preferably, the connecting portion 41 has a cylindrical structure coaxially disposed with the connecting pipe 11, a transition portion 411 having a frustum shape is disposed at a connection portion between the connecting portion 41 and the inner sealing body 2, an inner wall of one of the sealing holes 111 is a frustum surface having a gradually increasing diameter from inside to outside, and the transition portion 411 is attached to the inner wall of the sealing hole 111 after the inner sealing body 2 is sealingly inserted into the sealing chamber 12.
In the above scheme, the design of transition portion 411 on the inner sealing body 2 is matched with the frustum face of the hollow inner wall of the plugging hole 111, so that the inner sealing body 2 can realize good sealing of the joint through close fitting between the transition portion 411 and the frustum face after being inserted into the plug.
In the above embodiment, the connecting tube 11 is provided with a locking structure 6 which is locked and matched with the connecting part 41.
In the above embodiment, the locking structure 6 can fix the position of the inner seal body 2 after the inner seal body 2 is inserted into the pipeline to be plugged, so as to prevent the inner seal body 2 from moving, and ensure good sealing performance of the inner seal body 2 to the inside of the pipeline.
More specifically, a locking point is provided at a side end of the connecting portion 41, a bolt hole corresponding to the locking point is provided in a side wall of the connecting pipe 11, a bolt which abuts against the locking point of the connecting portion 41 after being tightened is fitted into the bolt hole, and the bolt constitutes the locking structure 6.
In the above scheme, after the inner sealing body 2 is inserted into the plug and assembled, the jackscrew is screwed down, so that the jackscrew is tightly abutted against a locking point (designated by b in the figure) on the connecting part 41, thereby ensuring firm assembly between the inner sealing body 2 and the connecting pipe 11, namely ensuring that the inner sealing body 2 is assembled more firmly and keeping good sealing performance at the joint with other parts.
In this embodiment, the valve 4 is a plate valve, and the valve channel of the valve 4, the connecting pipe 11 and the plugging cylinder 3 are coaxially arranged, so as to ensure good communication between the valve channel and the connecting pipe 11 and the plugging cylinder 3, and to enable the inner sealing body 2 to be smoothly pushed.
The locking point may be a jackscrew slot that mates with a jackscrew.
In this embodiment, the sealing structure on the inner sealing body 2 at least includes the following two forms:
1) the sealing structure is a flexible sealing sleeve which is sleeved outside the inner sealing body 2 and can be compressed and deformed.
In scheme 1), after the seal cover passes through shutoff hole 111 along with inner seal body 2, the seal cover gets into the lumen inside, the one end of seal cover supports and leans on and follows in a shutoff hole 111 hole of keeping away from connecting pipe 11 to, along with inner seal body 2 propelling movement closely insert sealed cabin 12 inner chambers after, the seal cover can be by the extrusion inflation of certain degree, thereby inseparable closely laminating with pipeline (shutoff position department) internal surface, realize good shutoff.
2) The sealing structure is a longitudinal sealing ring groove 412 longitudinally and annularly arranged along the outer surface of the inner sealing body 2, and the side wall of the connecting pipe 11 is provided with a glue injection port (denoted by c in the figure) corresponding to the longitudinal sealing ring groove 412.
In the above-mentioned scheme 2), the inner sealing body 2 is inserted into the sealing bin 12, and after the connecting portion 41 is tightly connected to the plugging hole 111, the sealant is injected into the longitudinal sealing ring groove 412 through the sealant injection port, and after the sealant is uniformly diffused and fully filled in the longitudinal sealing ring groove 412, the inner sealing body 2 is plugged with the inner surface of the pipeline (at the plugging point).
Further, a circumferential sealing groove 413 is circumferentially formed on an outer surface of the connecting portion 41, and the circumferential sealing groove 413 communicates with the longitudinal sealing ring groove 412.
In the above scheme, the design of hoop seal groove 413 makes after injecting glue mouth injection colloid for the packing through the colloid obtains good sealedly between the inner wall of connecting portion 41 and connecting pipe 11 (or hoop seal groove 413), promotes the leakproofness of whole shutoff structure.
In a preferred embodiment, the pushing structure 5 is a long pushing rod, which penetrates through one end of the plugging cylinder 3, one end of which is exposed, and the other end of which is detachably connected to the corresponding end of the inner sealing body 2.
Among the above-mentioned embodiment, propelling movement structure 5 adopts simple propelling movement pole, and the promotion inner seal body 2 that can be good through exerting external force at one end removes and carries out the shutoff, easy operation, convenience.
In a preferred embodiment, a packing chamber 31 is integrally formed at one end of the pressurized plugging cylinder 3 remote from the valve 4, a packing cover 311 is provided at an end of the packing chamber 31, and one end of the push rod passes through the packing chamber 31 and the packing cover 311.
In the above embodiment, the design of the gland chamber 31 ensures that the sealing performance of the plugging cylinder 3, the connecting pipe 11 and the internal flow passage of the pipeline can be ensured at the initial stage of the pushing structure 5 operating and pushing the internal sealing body 2, and the gland 311 is designed to facilitate the filling of the gland.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a device that shutoff was pressed in fire was not moved in pipeline not stop transportation which characterized in that: the pipeline plugging device comprises an outer plugging pipe (1), an inner sealing body (2), plugging working cylinders (3) and valves (4), wherein the outer plugging pipe (1) is used for being arranged outside a pipeline plugging point in a sealing manner, plugging holes (111) are coaxially formed in the middle parts of two sides of the outer plugging pipe respectively, a connecting pipe (11) vertical to the outer plugging pipe (1) is hermetically assembled on the periphery of the outer side of one of the plugging holes (111), a hollow sealing bin (12) is hermetically assembled on the periphery of the outer side of the other plugging hole (111), a valve port of each valve (4) is hermetically assembled with a pipe opening of the corresponding connecting pipe (11), the plugging working cylinders (3) are detachably and hermetically assembled at the other valve port of the corresponding valves (4), the inner sealing body (2) is arranged in the plugging working cylinders (3), and pushing structures (5) detachably connected with one end of the inner sealing body (2) are arranged in the plugging working cylinders (3), the pushing structure (5) is used for pushing the inner sealing body (2) to the other end of the valve channel of the plugging working barrel (3) and the valve (4) and the connecting pipe (11) to be inserted into the sealing bin (12) in a sealing mode, the inner sealing body (2) is connected with one end of the pushing structure (5) and one of the plugging holes (111) in a sealing mode, and a sealing structure connected with the inner wall of a pipeline plugging point in a sealing mode is arranged outside the inner sealing body (2).
2. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 1, which is characterized in that: connecting pipe (11) are the pipe, and its internal diameter is greater than the aperture of shutoff hole (111), sealed storehouse (12) inner chamber be with the cylindric cavity of shutoff hole (111) coaxial setting, interior seal (2) be with the cylindric component of shutoff hole (111) inner chamber adaptation, the one end of interior seal (2) is equipped with connecting portion (41), connecting portion (41) with push structure (5) can dismantle the connection, and works as interior seal (2) are sealed inserts back in sealed storehouse (12), connecting portion (41) and one of them the hole edge sealing contact in shutoff hole (111).
3. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 2, which is characterized in that: connecting portion (41) for with the cylindric structure of connecting pipe (11) coaxial setting, connecting portion (41) with the junction of interior seal (2) is equipped with transition portion (411) of frustum form, one of them the downthehole wall of shutoff hole (111) is established to the awl mesa that becomes gradually from interior to outside diameter, works as interior seal (2) are sealed to be inserted back in sealed storehouse (12), transition portion (411) with the downthehole wall laminating of shutoff hole (111).
4. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 3, which is characterized in that: the connecting pipe (11) is provided with a locking structure (6) which is in locking fit with the connecting part (41).
5. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 4, which is characterized in that: the connecting part (41) side is provided with a locking point location, the side wall of the connecting pipe (11) is provided with a jackscrew hole corresponding to the locking point location, a jackscrew which is screwed down and then abuts against the locking point location of the connecting part (41) is assembled in the jackscrew hole, and the jackscrew forms the locking structure (6).
6. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 2, which is characterized in that: the sealing structure is a flexible sealing sleeve which is sleeved outside the inner sealing body (2) and can be compressed and deformed.
7. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 2, which is characterized in that: the sealing structure is a longitudinal sealing ring groove (412) longitudinally and annularly arranged on the outer surface of the inner sealing body (2), and a glue injection opening corresponding to the longitudinal sealing ring groove (412) is formed in the side wall of the connecting pipe (11).
8. The device for blocking the pipeline under pressure without stopping conveying fire according to claim 7, which is characterized in that: the outer surface of the connecting part (41) is circumferentially provided with a circumferential sealing groove (413), and the circumferential sealing groove (413) is communicated with the longitudinal sealing ring groove (412).
9. A method for blocking a pipeline without stopping fire under pressure without stopping the pipeline, which is implemented by the device for blocking the pipeline without stopping the fire under pressure according to any one of claims 1 to 8, and is characterized by comprising the following steps:
firstly, after confirming a position to be blocked on site, cleaning external attachments of a pipeline anticorrosive coating and a pipeline insulating layer to ensure that a construction part has no impurities or foreign matters;
step two, an outer plugging pipe (1) is hermetically installed outside the pipeline plugging point;
step three, installing the valve (4) and ensuring that the valve (4) is flexible to open and close and good in sealing;
step four, installing a pressurized tapping machine at the other valve port of the valve (4), then opening the valve (4), and carrying out pressure test by adopting nitrogen or water to ensure that the pipeline, the outer plugging pipe (1), the connecting pipe (11) and the valve (4) are well connected and sealed;
step five, tapping under pressure;
step six, after the hole is opened, closing the valve (4), and removing the hole opener with pressure;
seventhly, installing a plugging working barrel (3) at the other valve port of the valve (4);
step eight, opening a valve (4), pushing the inner sealing body (2) through the opening by a pushing structure (5), enabling the inner sealing body (2) to be respectively connected with the sealing bin (12) and one of the sealing holes (111) in a sealing manner, and simultaneously enabling the sealing structure to seal the inside of the pipeline and keep the inner sealing body (2) fixed;
and ninthly, removing the valve (4), and installing a plugging plate at the pipe orifice of the connecting pipe (11).
10. The method for blocking the pipeline without stopping conveying and without pressing fire according to claim 9, wherein the method comprises the following steps: the inner sealing body (2) is hollow, a drainage port communicated with the inner cavity of the inner sealing body is formed in the side end of the inner sealing body, a drainage hole communicated with the inner cavity of the inner sealing body is formed in one end of the inner sealing body (2), and a plug is detachably arranged at the drainage hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111596994.4A CN114263805A (en) | 2021-12-24 | 2021-12-24 | Device and method for blocking pipeline under pressure without stopping fire during non-stop transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111596994.4A CN114263805A (en) | 2021-12-24 | 2021-12-24 | Device and method for blocking pipeline under pressure without stopping fire during non-stop transportation |
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| Publication Number | Publication Date |
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| CN114263805A true CN114263805A (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111596994.4A Pending CN114263805A (en) | 2021-12-24 | 2021-12-24 | Device and method for blocking pipeline under pressure without stopping fire during non-stop transportation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117307867A (en) * | 2022-06-24 | 2023-12-29 | 辽河石油勘探局有限公司 | Pipeline welding sealing device |
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