CN109237194B - Temporary pipeline plugging device and temporary pipeline plugging method - Google Patents
Temporary pipeline plugging device and temporary pipeline plugging method Download PDFInfo
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- CN109237194B CN109237194B CN201811338845.6A CN201811338845A CN109237194B CN 109237194 B CN109237194 B CN 109237194B CN 201811338845 A CN201811338845 A CN 201811338845A CN 109237194 B CN109237194 B CN 109237194B
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- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/115—Caps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- Mechanical Engineering (AREA)
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- Fluid Mechanics (AREA)
- Pipe Accessories (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a temporary pipeline plugging device and a temporary pipeline plugging method, wherein the temporary pipeline plugging device comprises: a plugging member capable of plugging a pipeline; and the driving device is connected with the plugging piece and is used for applying pressure to the plugging piece so as to enable the plugging piece to plug the pipeline. Compared with the prior art, the temporary pipeline plugging device disclosed by the invention has the advantages that the driving device is adopted to apply pressure to the plugging piece, and the pressure of the driving device is utilized to enable the plugging piece to plug the pipeline, so that the probability of plugging failure is reduced, and the effectiveness, safety and reliability of pipeline plugging are improved; meanwhile, when plugging is needed, the plugging piece is directly arranged at a plugging point of the pipeline, the pressure of the driving device is utilized to enable the plugging piece to plug the pipeline, advanced setting and timed maintenance are not needed, plugging is simplified, and timeliness of pipeline plugging is improved.
Description
Technical Field
The invention relates to the technical field of pipeline construction and detection, in particular to a pipeline temporary plugging device and a pipeline temporary plugging method.
Background
During the construction and detection of pipelines, the plugging of pipelines, such as drainage pipelines, is usually involved. At present, common pipeline plugging methods mainly comprise temporary facility plugging, fixed facility plugging and tool plugging, the temporary facility plugging comprises gunny bag plugging and wall plugging, the fixed facility plugging mainly comprises slot flashboard plugging, and the tool plugging comprises inflation pipeline plugging, mechanical pipe plug plugging, wood plug plugging and water stop plate plugging.
The hemp bag plugging is mainly used for plugging the pipeline by fillers such as bagged sand and soil, the drainage pipeline can be plugged in a short time, but the fillers are easy to lose under the condition of large liquid level difference, so that the plugging is ineffective; wall body shutoff and slot flashboard shutoff ageing efficiency is relatively poor, needs to set up the device in advance and regularly maintain, is difficult to deal with the detection and the maintenance operating mode under the pipeline emergency.
In addition, tools such as an inflatable bag, a wooden plug or a water stop plate are mainly adopted to plug the pipeline by the tool plugging method, the pipeline can be plugged quickly by the tool plugging measures, but the liquid pressure in the pipeline is difficult to quantitatively calculate, the strength difference of the plugging tool material is large, the bearing capacity, the shearing resistance and the sealing performance of the plugging tool material are difficult to take into consideration under the condition of large liquid pressure, the situations of air leakage of the inflatable bag, cracks of the wooden plug and the water stop plate and the like are easy to occur, and the plugging failure is caused.
In summary, how to improve effectiveness, safety, reliability and timeliness of pipeline plugging is a problem to be solved urgently by those skilled in the art at present.
Disclosure of Invention
The invention aims to provide a temporary pipeline plugging device, which improves the effectiveness, safety, reliability and timeliness of pipeline plugging. Another object of the present invention is to provide a temporary plugging method for pipelines.
In order to achieve the above purpose, the invention provides the following technical scheme:
a temporary pipeline plugging device comprising:
a plugging member capable of plugging a pipeline;
and the driving device is connected with the plugging piece and is used for applying pressure to the plugging piece so as to enable the plugging piece to plug the pipeline.
Preferably, the temporary pipeline plugging device further comprises: and the sensor is arranged on the liquid facing side of the plugging piece and is used for detecting the liquid pressure at the plugging part.
Preferably, the driving device is in signal connection with the sensor, and the driving device can adjust the pressure applied to the blocking piece according to the detection value of the sensor.
Preferably, the closure comprises: the sealing element is fixedly connected with the plugging support piece; the sealing element is used for being connected with a pipeline in a sealing mode, and the driving device is connected with the blocking support piece.
Preferably, the plugging support piece is a steel plate, and the sealing piece is a rubber pad.
Preferably, the power output element of the drive device is detachably and fixedly connected with the blocking element.
Preferably, the number of the power output parts is at least two, and the position of at least one power output part acting on the blocking part is adjustable.
Preferably, a nut is fixed on the blocking piece, and the power output piece is provided with a thread structure in threaded fit with the nut.
Preferably, the drive means is a hydraulic drive system comprising: the oil tank is used for conveying oil in the oil tank to the hydraulic pump of the hydraulic cylinder; and a piston rod of the hydraulic cylinder is fixedly connected with the plugging piece.
Preferably, the hydraulic drive system further comprises a base, and the hydraulic pump, the oil tank and the hydraulic cylinder are all arranged on the base; wherein, the hydraulic cylinder with base detachably fixed connection.
Preferably, the temporary pipeline plugging device further comprises a handle arranged on the plugging piece.
Compared with the prior art, the temporary pipeline plugging device provided by the invention has the advantages that the driving device is adopted to apply pressure to the plugging piece, and the pressure of the driving device is utilized to enable the plugging piece to plug the pipeline, so that the probability of plugging failure is reduced, and the effectiveness, safety and reliability of pipeline plugging are improved; meanwhile, when plugging is needed, the plugging piece is directly arranged at a plugging point of the pipeline, the pressure of the driving device is utilized to enable the plugging piece to plug the pipeline, advanced setting and timed maintenance are not needed, plugging is simplified, and timeliness of pipeline plugging is improved.
Based on the temporary pipeline plugging device, the invention also provides a temporary pipeline plugging method, which comprises the following steps:
placing the plugging piece at a plugging point of the pipeline;
and applying pressure to the plugging piece by adopting a driving device so that the plugging piece plugs the pipeline.
Preferably, the temporary pipeline plugging method includes the steps of: applying pressure to the plugging piece by using a driving device so as to enable the plugging piece to plug the pipeline, and then further comprising the following steps:
passing a liquid into the conduit;
detecting the liquid pressure in the pipeline by using a sensor;
preferably, the temporary pipeline plugging method further includes the steps of: adjusting the pressure applied to the closure in response to the detected fluid pressure.
Preferably, the temporary pipeline plugging method further includes the steps of:
and acquiring the liquid pressure to which the plugging piece is subjected according to the detected liquid pressure, and detecting and/or constructing in the pipeline when the liquid pressure is lower than the bending strength and the shearing strength of the plugging piece.
Preferably, the plugging points comprise an upstream plugging point and a downstream plugging point, and the upstream plugging point is positioned upstream of the downstream plugging point along the flow direction of the liquid in the pipeline;
when the diameter of the pipeline is not more than 800mm, selecting one upstream plugging point for plugging;
and when the diameter of the pipeline is larger than 800mm, selecting at least two upstream plugging points for plugging.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a temporary pipeline plugging device provided by an embodiment of the invention;
FIG. 2 is a partial schematic view of a temporary pipeline plugging device provided by an embodiment of the present invention;
FIG. 3 is a partial schematic view of a temporary pipeline plugging device provided by an embodiment of the present invention;
fig. 4 is a schematic layout diagram of plugging points in the temporary pipeline plugging method according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, a temporary pipeline plugging device provided by an embodiment of the present invention includes: a closure 1 and a drive; wherein, the plugging piece 1 can plug the pipeline; the driving device is connected with the plugging member 1, and the driving device applies pressure to the plugging member 1 to enable the plugging member 1 to plug the pipeline.
It will be appreciated that during the occlusion process the drive means continues to exert pressure on the occluding member 1 to ensure occlusion.
The size of the plugging piece 1 can be selected according to the diameter of the pipeline and the liquid pressure in the pipeline, so that the bending resistance and the shearing resistance of the plugging piece 1 can meet the design safety requirements.
According to the temporary pipeline plugging device provided by the embodiment of the invention, the driving device is adopted to apply pressure to the plugging piece 1, and the pressure of the driving device is utilized to enable the plugging piece 1 to plug a pipeline; meanwhile, when plugging is needed, the plugging piece 1 is directly arranged at a plugging point of the pipeline, the pressure of the driving device is utilized to enable the plugging piece 1 to plug the pipeline, advanced setting and timed maintenance are not needed, plugging is simplified, and timeliness of pipeline plugging is improved.
In order to further optimize the above technical solution, the above temporary pipeline plugging device further includes: and the sensor 4 is arranged on the liquid facing side of the plugging piece 1 and is used for detecting the liquid pressure at the plugging part.
The type of the sensor 4 is selected according to actual needs, for example, the sensor 4 is a digital pressure sensor, and the type of the sensor 4 is not limited in the embodiments of the present invention.
In the temporary pipeline plugging device, the sensor 4 is used for detecting the liquid pressure at the plugging part, namely the liquid pressure at the plugging part in the pipeline, so that the liquid pressure in the pipeline can be specifically obtained, and the reliability of plugging is convenient to ensure; meanwhile, the liquid pressure on the plugging piece 1 can be obtained according to the detected liquid pressure, and when the liquid pressure is lower than the bending strength and the shearing strength of the plugging piece 1, the detection and/or the construction can be carried out in the pipeline.
In order to improve the effectiveness, safety and reliability of pipeline plugging, the pressure applied to the plugging piece 1 by the driving device is adjustable and can be adjusted according to actual requirements.
Further, the driving device is in signal connection with the sensor 4, and the driving device can adjust the pressure applied to the plugging member 1 according to the detection value of the sensor 4.
Specifically, when the detection value of the sensor 4 is smaller than the pressure applied to the plugging member 1 by the driving device, the driving device can reduce the pressure applied to the plugging member 1, and when the detection value of the sensor 4 is larger than the pressure applied to the plugging member 1 by the driving device, the driving device can increase the pressure applied to the plugging member 1, so that the effectiveness, the safety and the reliability of pipeline plugging are effectively improved.
In order to improve the sealing performance of the block piece 1, the above block piece 1 comprises: a plugging support member 11, a sealing member 12 fixedly connected with the plugging support member 11; wherein the sealing member 12 is adapted to be sealingly connected to the pipe and the driving means is connected to the plugging support 11. At this time, if the sensor 4 is provided, the sensor 4 is connected to the seal member 12.
The specific materials and shapes of the plugging support 11 and the sealing member 12 are selected according to actual requirements. Preferably, the plugging support 11 and the sealing member 12 are square, i.e. rectangular or square.
Specifically, the size of the plugging support member 11 can be selected according to the diameter of the wellhead and the pipeline, and the pressure of the liquid in the pipeline, so as to ensure that the bending resistance and the shearing resistance of the plugging support member 11 meet the design safety requirements. The dimensions of the seal 12 may be selected based on the sealing requirements and pressures to be experienced.
The plugging support member 11 is preferably a steel plate because the steel plate has good bending resistance and shearing resistance; the sealing member 12 is preferably a rubber pad because of its good sealing properties. Moreover, the plugging member 1 has good safety and durability, and can be recycled.
The thickness of the steel plate determines the bending resistance of the steel plate, and the thickness of the steel plate and the distance between stress points determine the shearing resistance of the steel plate. The pressure that the shutoff point of different pipe diameters bore is inequality, and the difference of pipe diameter has also decided the difference to the requirement of shutoff point department steel sheet shear capacity.
Specifically, the plugging support piece 11 is a Q235 common carbon steel plate, has high structural strength, and can bear a large load. Of course, the plugging supporting member 11 may also be made of other metal plates or other harder plates, such as a stainless steel plate, and the sealing member 12 may also be made of other elastic materials, such as a silicone pad, which is not limited in the embodiment of the present invention.
The sealing member 12 is fixedly connected to the plugging support member 11, specifically, the sealing member 12 is adhesively connected to the plugging support member 11, or the sealing member 12 is fixedly connected to the plugging support member 11 through a connecting member, which is not limited in the embodiment of the present invention.
The above-mentioned plugging member 1 has a two-layer structure. Of course, other configurations of the block piece 1 are also possible, for example, the block piece 1 has a three-layer structure, i.e. a first layer of steel plate, a second layer of steel plate and a sealing gasket, and is not limited to the above-described embodiments.
In order to facilitate replacement, the power output part of the driving device is detachably and fixedly connected with the blocking part 1. Therefore, the corresponding plugging piece 1 can be selected for plugging according to actual needs; correspondingly, a corresponding driving device can be selected for pressing, and the use flexibility is improved.
Further, the number of the power output parts is at least two, and the position of at least one power output part acting on the plugging part 1 is adjustable. Thus, the distance between the positions acted by the power output part can be adjusted, the shearing resistance of the plugging part 1 is adjusted, and the general performance of the plugging part 1 is improved.
In the practical application process, the position of each power take-off acting on the block piece 1 can be selected to be adjustable, so that the shearing resistance of the block piece 1 can be adjusted to the maximum extent.
In order to facilitate the realization of the detachable fixed connection, the blocking piece 1 is fixed with a nut 5, and the power output piece is provided with a thread structure in thread fit with the nut 5. Of course, a threaded hole matched with the power output part in a threaded manner can be directly formed in the plugging member 1.
In practical application, the blocking piece 1 and the power output piece may also be detachably and fixedly connected through other structures, such as clamping, and the like, and the invention is not limited to the above embodiments.
In the temporary pipeline plugging device, the driving device can be a pneumatic device, such as an air cylinder; also electrically powered devices, such as motors; it may also be a hydraulic drive system. In order to ensure reliability, it is preferable that the driving device is a hydraulic driving system including: the hydraulic system comprises an oil tank, a hydraulic cylinder 6 and a hydraulic pump 9, wherein the hydraulic pump is used for conveying oil in the oil tank to the hydraulic cylinder 6; wherein, the piston rod of the hydraulic cylinder 6 is fixedly connected with the plugging piece 1.
The hydraulic pump 9 delivers oil in the oil tank to the hydraulic cylinder 6, and the hydraulic cylinder 6 applies pressure to the block 1. In the hydraulic drive system described above, the oil tank and the hydraulic pump 9, and the hydraulic pump 9 and the hydraulic cylinder 6 are communicated through the oil pipe 8.
In order to ensure that the plugging member 1 is stressed uniformly and balanced and the shearing resistance of the plugging member 1 is convenient to adjust, the number of the hydraulic cylinders 6 is at least two, and at the moment, the piston rod is the power output member mentioned above. When the power transmission element is detachably fixedly connected to the blocking element 1, the piston rod is detachably fixedly connected to the blocking element 1.
Taking the square plugging piece 1 as an example, four hydraulic cylinders 6 are respectively distributed at four top corners of the plugging piece 1. Of course, the closure 1 may be in other forms and the hydraulic cylinder 6 may be in other forms, and is not limited to the above-described embodiment.
When there are a plurality of hydraulic cylinders 6, it is possible to choose only one hydraulic pump 9, i.e. all hydraulic cylinders 6 are fed by the same hydraulic pump 9. Of course, a plurality of hydraulic pumps 9 may be selected without considering the cost.
Preferably, the hydraulic drive system further comprises a base 2, and the hydraulic pump 9, the oil tank and the hydraulic cylinder 6 are all arranged on the base 2. Thus, the base 2 can support and fix other components of the hydraulic driving system, thereby facilitating the installation and the disassembly and providing counter force for the whole hydraulic driving system.
Specifically, the base 2 is provided with a mounting hole 7, and the hydraulic cylinder 6 is provided at the mounting hole 7. For the convenience of installation and dismantlement, above-mentioned pneumatic cylinder 6 and base 2 detachably fixed connection, for example, pneumatic cylinder 6 and base 2 realize detachably fixed connection through screw-thread fit, and at this moment, mounting hole 7 is the screw hole. Of course, the hydraulic cylinder 6 and the base 2 may be detachably and fixedly connected through other structures, which is not limited in the embodiment of the present invention.
In practical application, the base 2 can be selected to be attached to the side wall of the tube well, so as to support the base 2. It will be appreciated that the conduit is located within a well, the well head of the well having an axial direction perpendicular to the axial direction of the conduit.
In order to facilitate the removal of the block piece 1, the temporary pipeline blocking device further comprises a handle 3 arranged on the block piece 1. Therefore, the plugging piece 1 can be moved by holding the handle 3 by hand, so that the movement is facilitated, and the installation and the disassembly of the plugging piece 1 are facilitated.
The shape and structure of the handle 3 are selected according to actual needs, and the handle 3 has, for example, a ring shape or an L shape.
The number of the handles 3 is also selected according to actual needs, and it is preferable that at least two handles 3 are selected for the convenience of movement.
In order to avoid that the handle 3 interferes with the blocking function of the closure 1, it is preferred that the handle 3 is located at the edge of the closure 1.
Based on the temporary pipeline plugging device provided by the embodiment, the embodiment of the invention also provides a temporary pipeline plugging method, and the temporary pipeline plugging method comprises the following steps:
s01: placing the plugging piece 1 at the plugging point of the pipeline:
before plugging, the corresponding plugging piece 1 needs to be selected according to actual conditions so as to ensure that the bending resistance and the shearing resistance of the plugging piece 1 meet the design safety requirements.
It should be noted that, after the harmful gas detection before the well is finished and the safety is confirmed, the plugging piece 1 is placed into the plugging point of the pipeline.
S02: and applying pressure to the plugging piece 1 by using a driving device so that the plugging piece 1 plugs the pipeline.
The plugging member 1 and the driving device related in the temporary pipeline plugging method can refer to the plugging member 1 and the driving device in the temporary pipeline plugging device, and are not described herein again.
According to the temporary pipeline plugging method, the driving device is adopted to apply pressure to the plugging piece 1, and the pressure of the driving device is utilized to enable the plugging piece 1 to plug the pipeline, so that compared with the prior art, the probability of plugging failure is reduced, and the effectiveness, safety and reliability of pipeline plugging are improved; meanwhile, when plugging is needed, the plugging piece 1 is directly arranged at a plugging point of the pipeline, the pressure of the driving device is utilized to enable the plugging piece 1 to plug the pipeline, advanced setting and timed maintenance are not needed, plugging is simplified, and timeliness of pipeline plugging is improved.
In order to obtain the liquid pressure in the pipeline, the temporary pipeline plugging method further comprises the following steps:
s03: allowing the liquid to enter the pipeline; the pressure of the liquid in the pipe is detected using the sensor 4.
In the above steps, the liquid is introduced into the pipeline, specifically, water is pumped in the well.
At this time, the temporary pipeline plugging method further includes step S04: the pressure exerted on the closure element 1 is adjusted in dependence on the detected liquid pressure. Thus, the reliability and effectiveness of plugging are further improved.
If a hydraulic driving system is used as a driving device, the hydraulic driving system can adjust the oil pressure in real time according to the liquid pressure, so that the applied pressure is adjusted, the sealing performance of the plug is ensured, and the failure of the plug is avoided.
In order to improve reliability, the temporary pipeline plugging method further comprises the following steps: and acquiring the liquid pressure to which the plugging member 1 is subjected according to the detected liquid pressure, and detecting and/or constructing the inside of the pipeline when the liquid pressure is lower than the bending strength and the shearing strength of the plugging member 1.
The safe differential pressure plugging is based on the design flow speed, flow, gradient and head loss of the pipeline, the water pressure of a plugging point is calculated, and therefore a safe plugging process and a safe operation flow of pipeline detection operation or construction operation are designed, and smooth implementation of the pipeline detection operation and the construction operation is guaranteed. The temporary pipeline plugging method is based on a safety differential pressure plugging principle.
In the practical application process, when the diameter of the pipeline is not more than 800mm, an upstream plugging point is selected for plugging; when the diameter of the pipeline is larger than 800mm, at least two upstream plugging points are selected for plugging.
It will be understood that one closure 1 is placed in each closure point. The plugging points comprise an upstream plugging point and a downstream plugging point, and the upstream plugging point is positioned upstream of the downstream plugging point along the flow direction of the liquid in the pipeline.
Specifically, when two upstream plugging points are selected for plugging, a first upstream plugging point is arranged at an upstream wellhead at a section which is far away from a detection construction working section, and a second upstream plugging point is arranged at an upstream wellhead at the working section; the downstream plugging point is arranged at a downstream wellhead of a downstream first section of the working well section; two to three sections can be selected according to actual conditions in each selection of the working section, and the specific plugging point design and the working well section arrangement are shown in figure 4. For a pipe network with branch pipes, the ports of the branch pipes or the main pipe can be plugged in sequence according to requirements.
It will be appreciated that both the first plugging point and the second plugging point are upstream plugging points.
It should be noted that, as the diameter of the pipeline increases continuously, the pressure borne by the plugging member 1 at the first plugging point at the upstream tends to increase by a multiple, so that for the pipeline with large diameter, the safety and reliability of plugging must be highly emphasized, and once the plug is damaged, an immeasurable result will be generated. The upstream second plugging point bears the water pressure by the plugging piece 1 at the plugging point 1, so that the pressure borne by the plugging piece 1 at the upstream second plugging point mainly depends on the height of the hydrostatic liquid level reserved between the first plugging point and the second plugging point.
In practical application, the plugging point may be selected in other manners, and is not limited to the above embodiment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (14)
1. A temporary pipeline plugging device, comprising:
a plugging member (1) capable of plugging a pipeline;
the driving device is connected with the plugging piece (1) and is used for applying pressure to the plugging piece (1) so as to enable the plugging piece (1) to plug the pipeline;
the power output part of the driving device is detachably and fixedly connected with the blocking part (1);
the number of the power output parts is at least two, and the position of at least one power output part acting on the plugging part (1) is adjustable.
2. The temporary pipeline plugging device of claim 1, further comprising: and the sensor (4) is arranged on the liquid facing side of the plugging piece (1) and is used for detecting the liquid pressure at the plugging part.
3. Temporary pipeline plugging device according to claim 2, wherein said driving means is in signal connection with said sensor (4) and is capable of adjusting the pressure applied to said plug (1) according to the value detected by said sensor (4).
4. Temporary pipeline plugging device according to claim 1, wherein said plugging member (1) comprises: a plugging support (11), a sealing element (12) fixedly connected with the plugging support (11); wherein the sealing element (12) is used for being connected with a pipeline in a sealing mode, and the driving device is connected with the plugging support piece (11).
5. Temporary pipe plugging device according to claim 4, wherein said plugging support (11) is a steel plate and said sealing member (12) is a rubber pad.
6. Temporary pipeline plugging device according to claim 1, wherein a nut (5) is fixed to the plugging member (1), and the power take-off member is provided with a thread structure in threaded engagement with the nut (5).
7. The temporary pipeline plugging device of claim 1 wherein said drive means is a hydraulic drive system comprising: a tank, a hydraulic cylinder (6), a hydraulic pump (9) for delivering oil in the tank to the hydraulic cylinder (6); wherein, the piston rod of the hydraulic cylinder (6) is fixedly connected with the plugging piece (1).
8. Temporary pipeline plugging device according to claim 7, wherein said hydraulic drive system further comprises a base (2), said hydraulic pump (9), said oil tank and said hydraulic cylinder (6) being provided to said base (2); wherein, the hydraulic cylinder (6) is detachably and fixedly connected with the base (2).
9. Temporary pipe closure according to any of claims 1-8, further comprising a handle (3) arranged to the closure (1).
10. A temporary pipeline plugging method is characterized by comprising the following steps:
placing the plugging piece (1) at a plugging point of a pipeline;
applying pressure to the plugging piece (1) by using a driving device so as to enable the plugging piece (1) to plug the pipeline;
the power output part of the driving device is detachably and fixedly connected with the blocking part (1);
the number of the power output parts is at least two, and the position of at least one power output part acting on the plugging part (1) is adjustable.
11. The method for temporarily plugging a pipeline according to claim 10, wherein in the step of: applying pressure to the plugging piece (1) by using a driving device so as to enable the plugging piece (1) to plug the pipeline, and then further comprising the following steps:
passing a liquid into the conduit;
and detecting the liquid pressure in the pipeline by using a sensor (4).
12. The method for temporarily plugging a pipeline according to claim 11, further comprising the steps of: -adjusting the pressure exerted on the closure (1) in dependence on the detected liquid pressure.
13. The method for temporarily plugging a pipeline according to claim 11, further comprising the steps of:
and acquiring the liquid pressure to which the plugging piece (1) is subjected according to the detected liquid pressure, and detecting and/or constructing the inside of the pipeline when the liquid pressure is lower than the bending strength and the shearing strength of the plugging piece (1).
14. A method of temporarily plugging a pipeline according to any of claims 10 to 13 wherein said plugging points comprise an upstream plugging point and a downstream plugging point, said upstream plugging point being located upstream of said downstream plugging point in the direction of flow of liquid within said pipeline;
when the diameter of the pipeline is not more than 800mm, selecting one upstream plugging point for plugging;
and when the diameter of the pipeline is larger than 800mm, selecting at least two upstream plugging points for plugging.
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