Inflatable pipe plug capable of being filled with water

Abstract

The utility model relates to the technical field of pipeline interior plugging, in particular to a water-injectable inflatable pipe plug which comprises a central shaft, an annular air bag, a first cover plate and a second cover plate, the annular air bag is nested outside the central shaft, and the first cover plate and the second cover plate are both fixedly connected with the central shaft and abut against the two ends of the annular air bag in the axial direction respectively. An inflation runner and an infusion runner are arranged in the center shaft, one end of the inflation runner communicates with one end of the center shaft, the other end of the inflation runner communicates with the annular air bag, the infusion runner penetrates through the two ends of the center shaft, and the input ends of the inflation runner and the infusion runner are located at the same end of the center shaft. When a pipeline is cut, the air bag is inflated through the inflation flow channel to seal the pipeline, then water is injected through the liquid conveying flow channel, water seal is formed, residual oil dirt in the pipeline is prevented from being heated and combusted during cutting, safety is better, and when the pipeline is welded, the pipe plug prevents welding slag from falling into the pipeline or prevents harmful gas generated in the pipeline from overflowing outwards. And accidents of combustible gas combustion and the like are caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pipeline internal plugging, more particularly to an inflatable pipe plug capable of water injection. BACKGROUND

[0002] When installing an oil and gas conveying pipeline or modifying a pipeline route on a sea platform, welding and cutting operations need to be performed on the oil and gas pipeline. When welding or cutting the crude oil conveying pipeline, oil stains and sludge remaining on the inner wall of the pipeline are difficult to clean completely, and fire accidents such as fire and explosion are likely to occur when performing welding or cutting operations such as cutting on the pipeline, which seriously affects the personal safety of the operators.

[0003] A method commonly used in the prior art to remove the oil stains and sludge remaining on the pipeline is to flush the crude oil conveying pipeline. However, the pipeline inner wall still remains oil stains and sludge after water flushing, which is difficult to clean completely. Oil residues and sludge are flammable and explosive materials, and can easily burn when heated during pipeline cutting, which poses an explosion risk and brings great safety hazards to construction. SUMMARY

[0004] The utility model aims at overcoming the problem of difficult cleaning of oil stains and sludge during pipeline welding in the prior art, which leads to construction safety hazards, and provides an inflatable pipe plug capable of water injection. Water is injected into the pipeline through the pipe plug to form a water seal, thereby avoiding explosion during welding and cutting.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] Provided is an inflatable pipe plug capable of water injection, comprising a central shaft, an annular air bag, a first baffle and a second baffle. The annular air bag is nested outside the central shaft. The first baffle and the second baffle are both fixedly connected to the central shaft and abut against the two ends of the annular air bag in the axial direction. The central shaft is internally provided with an inflation flow channel and a liquid delivery flow channel. One end of the inflation flow channel is communicated with one end of the central shaft, and the other end is communicated with the annular air bag. The liquid delivery flow channel penetrates through both ends of the central shaft. The input end of the inflation flow channel and the input end of the liquid delivery flow channel are both located at the same end of the central shaft.

[0007] The utility model discloses a water -filled inflatable pipe plug, when carrying out the cutting operation of oil and gas conveying pipeline on offshore platform, the operator installs the pipe plug that does not inflate into the inside of the pipeline that needs cutting, the input end of the inflation channel is connected with the inflation device, after starting the inflation device, the air bag will gradually inflate, when the air bag expands to a certain degree, the inner wall of the pipeline is extruded, so that the pipeline realizes the sealing, then the input end of the transfusion channel is connected with the water source, because the transfusion channel is connected with the both ends of the central shaft, so the water flow can flow into the pipeline that needs cutting through the transfusion channel, until the pipeline is filled with water, the water injection can stop, at this time, the inside of the pipeline forms the water seal, and the oxygen is isolated, so when cutting, the residual oil dirt and oil residue in the pipeline are prevented from burning by heat, the risk of fire and explosion accidents in the construction site is reduced, and the safety is improved, and when welding the pipeline, the operator can also install the pipe plug into the inside of the pipeline that needs welding and inflate, but the pipeline does not need to be transfused, the pipe plug can prevent the welding slag and welding tumor generated during the welding operation from falling into the inside of the pipeline, and the pipe plug can prevent other harmful gases generated in the inside of the pipeline due to heat from overflowing out of the pipeline, causes combustible gas combustion and other accidents, so that the construction safety is better.

[0008] Further, it further includes inflation control device and transfusion control device, the inflation control device includes inflation pipeline and inflation valve, the inflation pipeline is partially installed in the inflation channel, the input end of the inflation pipeline is out of the inflation channel, the inflation valve is installed at the input end of the inflation pipeline, the transfusion control device includes transfusion pipeline and transfusion valve, the transfusion pipeline is partially installed in the transfusion channel, the input end of the transfusion pipeline is out of the transfusion channel, the transfusion valve is installed at the input end of the transfusion pipeline. The setting of inflation pipeline and transfusion pipeline is more convenient to connect external inflation equipment or transfusion equipment, the inflation valve can control the start or end of inflation, the transfusion valve can control the start or end of transfusion, and the size of flow can also be controlled through the inflation valve and the transfusion valve, to avoid the explosion caused by the excessive inflation of air bag due to too fast inflation speed, and the construction safety is better.

[0009] Further, the inner wall of the inflation pipeline is installed with sensing device, and the sensing device is used for detecting the air pressure in the annular air bag. The sensing device is used for sensing whether the air bag is filled with enough gas, and good sealing of the pipeline can be formed, and the construction operation is carried out after confirming that the sealing is good, and the safety is better.

[0010] Further, the control module is further included, the sensing device is a pressure sensor, the inflation valve is an electric control valve, and the control module is electrically connected with the sensing device and the electric control valve. When the pressure sensor installed on the inner wall of the inflation pipeline senses that there is sufficient pressure in the air bag, the inflation valve is controlled to be closed through the control module to stop inflation, and manual detection of the pressure value and closing of the inflation device are not needed, so that convenience and safety are better.

[0011] Further, the outer part of the central shaft is further nested with a first sealing piece and a second sealing piece, the first sealing piece is located between the first cover plate and the annular air bag, and the second sealing piece is located between the second cover plate and the annular air bag. Since there may be a connecting gap between the central shaft and the first baffle and the second baffle, the sealing property is not good enough, and water leakage may occur, therefore, the first sealing piece and the second sealing piece can enhance the sealing property of the whole pipe plug, and water leakage is avoided.

[0012] Further, the first sealing piece and the second sealing piece are both made of rubber material. The rubber material has high elasticity, and can be tightly attached to the central shaft, the first cover plate and the second cover plate.

[0013] Further, the air bag and the central shaft are connected through adhesive. The air bag and the central shaft are fixed through adhesive, so that the air bag is more stable, and excessive deviation is avoided, so that the pipeline cannot be sealed.

[0014] Further, the first cover plate and the central shaft, and the second cover plate and the central shaft are all connected through sealing adhesive. The sealing adhesive makes the connection between the first cover plate and the central shaft, and the second cover plate and the central shaft more close, and water leakage is avoided.

[0015] Further, two pull handles are further included and installed on the first cover plate, and the two pull handles are arranged in parallel. Since the whole pipe plug has a certain weight, the pull handles can facilitate an operator to install, dismount, transfer and the like of the pipe plug.

[0016] Further, the pull handle and the first cover plate are welded. The connection strength between the pull handle and the first cover plate is enhanced, and the pull handle is prevented from being broken to scratch the carrier during carrying.

[0017] Compared with the prior art, the pipe plug has the advantages that:

[0018] 1、In the cutting pipe, the air bag is inflated by the inflation channel to seal the pipe, and then water is injected through the infusion channel to form a water seal in the pipe, which isolates oxygen, thereby avoiding the combustion of residual oil and sludge in the pipe during cutting, reducing the risk of accidents, and improving safety. When welding the pipe, the plug can prevent welding slag and welding tumors from falling into the pipe or prevent other harmful gases generated inside the pipe from overflowing outside the pipe due to heat, causing combustible gas combustion accidents.

[0019] 2、The setting of the inflation control device and the infusion control device can control the opening, closing and speed regulation of inflation or infusion, avoiding excessive inflation of the air bag due to excessive inflation speed, improving safety.

[0020] 3、The inductive device cooperates with the control module and the electric control valve to automatically detect the pressure value and close the inflation device, improving convenience and safety.

[0021] 4、The first seal and the second seal enhance the sealing of the entire plug, avoiding water leakage. The first cover plate and the second cover plate are connected to the center shaft by sealing glue, improving sealing.

[0022] 5、The setting of the lifting handle facilitates the installation, disassembly and transfer of the plug by the operator, improving convenience. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural diagram of an inflatable plug that can be injected with water;

[0024] Figure 2 is a structural diagram of an inflatable plug that can be injected with water;

[0025] Figure 3 is a structural diagram of an inflatable plug that can be injected with water.

[0026] In the drawings: 100, center shaft; 110, inflation channel; 120, infusion channel; 130, first seal; 140, second seal; 200, annular air bag; 300, first cover plate; 310, lifting handle; 400, second cover plate; 500, inflation control device; 510, inflation pipe; 520, inflation valve; 600, infusion control device; 610, infusion pipe; 620, infusion valve; 700, inductive device. DETAILED DESCRIPTION

[0027] The utility model makes further explanation in combination with specific embodiment. Among them, the drawing is only for example explanation, shows only is the schematic diagram, and cannot be understood as the limitation to this patent; in order to better explain the embodiment of the utility model, the drawing some components will have the omission, enlargement or reduction, and does not represent the size of actual product; for those skilled in the art, it is understandable that some well-known structures and its explanation in the drawing can be omitted.

[0028] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if there are terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the positional relationship of the term in the drawing is only for example explanation, and cannot be understood as the limitation to this patent, for the ordinary skilled in the art, can understand the specific meaning of the above terms according to the specific situation.

[0029] Embodiment one

[0030] A water-chargeable inflatable pipe plug, as shown in Figure 2 It includes central shaft 100, annular air bag 200, first cover plate 300 and second cover plate 400, annular air bag 200 is nested in the outside of central shaft 100, first cover plate 300 and second cover plate 400 are all fixedly connected with central shaft 100 and respectively abut against the two ends of annular air bag 200 in the axial direction, the inside of central shaft 100 is provided with inflatable flow channel 110 and infusion flow channel 120, one end of inflatable flow channel 110 is communicated with one end of central shaft 100, the other end is communicated with annular air bag 200, infusion flow channel 120 penetrates the two ends of central shaft 100, and the input end of inflatable flow channel 110 and the input end of infusion flow channel 120 are located at the same end of central shaft 100.

[0031] The working principle of the embodiment is as follows:

[0032] This invention relates to a water-injectable inflatable pipe plug. During oil and gas pipeline cutting operations on offshore platforms, operators insert an uninflated pipe plug into the pipe to be cut. An inflation device is connected to the input end of the inflation channel 110. Upon activation of the inflation device, the annular air bladder 200 gradually inflates. When the annular air bladder 200 inflates to a certain extent, it compresses the inner wall of the pipe, sealing it. Then, a water source is connected to the input end of the liquid delivery channel 120. Since the liquid delivery channel 120 connects to both ends of the central shaft 100, water can flow through the liquid delivery channel 120 into the pipe to be cut until the pipe is full. Water injection is then stopped. The pipeline's interior forms a water seal, isolating it from oxygen. This prevents residual oil and sludge from burning during cutting, reducing the risk of fire and explosion at the construction site and improving safety. Simultaneously, during pipeline welding, operators can insert a plug into the pipe to be welded and inflate the annular airbag 200 without needing to inject fluid into the pipeline. The plug prevents welding slag and weld beads from falling into the pipeline, making them difficult to clean. Furthermore, the sealed plug prevents other harmful gases generated inside the pipeline from escaping and causing flammable gas combustion accidents, resulting in better construction safety.

[0033] Example 2

[0034] This embodiment is a second embodiment of a water-fillable inflatable plug, such as... Figure 1 and Figure 3 As shown, the device includes a central shaft 100, an annular airbag 200, a first cover plate 300, a second cover plate 400, an inflation control device 500, and an infusion control device 600. The annular airbag 200 is nested outside the central shaft 100. The first cover plate 300 and the second cover plate 400 are both fixedly connected to the central shaft 100 and respectively abut against both ends of the annular airbag 200. An inflation channel 110 and an infusion channel 120 are provided inside the central shaft 100. One end of the inflation channel 110 connects to one end of the central shaft 100, and the other end connects to the annular airbag 200. The infusion channel 120 passes through both ends of the central shaft 100. The inflation channel 110... Both the input end and the input end of the infusion channel 120 are located at the same end of the central axis 100. The inflation control device 500 includes an inflation pipe 510 and an inflation valve 520. The inflation pipe 510 is partially installed in the inflation channel 110, and the input end of the inflation pipe 510 extends out of the inflation channel 110. The inflation valve 520 is installed at the input end of the inflation pipe 510. The infusion control device 600 includes an infusion pipe 610 and an infusion valve 620. The infusion pipe 610 is partially installed in the infusion channel 120, and the input end of the infusion pipe 610 extends out of the infusion channel 120. The infusion valve 620 is installed at the input end of the infusion pipe 610.

[0035] The working principle of this embodiment is as follows:

[0036] The worker connects the inflating device to the input end of the inflating pipeline 510, opens the inflating valve 520, adjusts the infusion speed, closes the inflating device and the inflating valve 520 after the inflation is completed, and then removes the inflating device. Similarly, the infusion device is connected to the input end of the infusion pipeline 610, the infusion valve 620 is opened, the infusion speed is adjusted, the infusion device and the infusion valve 620 are closed after the infusion is completed, and then the infusion device is removed. The inflating pipeline 510 and the infusion pipeline 610 are arranged to be more convenient for connecting external inflating equipment or infusion equipment. The inflating valve 520 can control the start or end of inflation, and the infusion valve 620 can control the start or end of infusion. At the same time, the size of the flow rate can also be adjusted through the inflating valve 520 and the infusion valve 620, so as to avoid the over-expansion of the air bag due to too fast inflation speed, thereby improving the safety.

[0037] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0038] Embodiment Three

[0039] This embodiment is a third embodiment of the water-inflatable inflatable pipe plug. This embodiment is similar to Embodiment Two, except that, as shown in Figure 3 the control module, the inner wall of the inflating pipeline 510 is provided with a sensing device 700, and in this embodiment, the sensing device 700 is a pressure sensor, and the inflating valve 520 is an electric control valve. The control module is electrically connected with the sensing device 700 and the electric control valve.

[0040] The working principle of this embodiment is as follows:

[0041] The pressure sensor senses the air pressure in the annular air bag 200 and feeds back the radio frequency signal to the control module. When the pressure sensor senses that there is sufficient pressure in the annular air bag 200, the control module controls the inflating valve 520 to be closed to stop the inflation, so as to ensure that a good seal is formed on the pipeline. After confirming that the seal is good, the work operation is performed. The pressure value does not need to be manually detected and the inflating device is closed, so that the convenience and safety are better.

[0042] Embodiment Four

[0043] This embodiment is a fourth embodiment of the water-inflatable inflatable pipe plug. This embodiment is similar to Embodiments Two and Three, except that, as shown in Figure 3As shown, the outer part of the central shaft 100 is also nested with a first sealing member 130 and a second sealing member 140, the first sealing member 130 is located between the first cover plate 300 and the annular air bag 200, the second sealing member 140 is located between the second cover plate 400 and the annular air bag 200, the first cover plate 300 and the central shaft 100, the second cover plate 400 and the central shaft 100 are all connected by sealing glue, the air bag and the central shaft 100 are connected by adhesive, and two pull handles 310 are installed on the first cover plate 300, the two pull handles 310 are arranged in parallel, and the pull handle 310 is welded with the first cover plate 300, and in addition, it can also be integrally formed, riveted and fixedly connected in other ways.

[0044] The working principle of the embodiment is as follows:

[0045] Since there may be a connection gap between the central shaft 100 and the first baffle and the second baffle, which may cause insufficient sealing and water leakage, the first sealing member 130 and the second sealing member 140 can enhance the sealing of the entire pipe plug to avoid water leakage, the sealing glue makes the connection between the first cover plate 300 and the central shaft 100 and the second cover plate 400 and the central shaft 100 more closely, avoiding water leakage, the air bag and the central shaft 100 are fixed by adhesive, so that the air bag is more stable and avoids excessive deviation, which causes the pipe to be unable to be sealed, since the entire pipe plug has a certain weight, the pull handle 310 can facilitate the operator to install, disassemble, transfer and other operations of the pipe plug.

[0046] In the specific content of the above specific embodiments, any non-contradictory combination of technical features can be combined, in order to make the description simple, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist Contradiction, it should be considered as the scope of the present application.

[0047] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An inflatable tubular plug that is water injectable, characterized in that, The center shaft (100), the annular air bag (200), the first cover plate (300) and the second cover plate (400), the annular air bag (200) is nested outside the center shaft (100), the first cover plate (300) and the second cover plate (400) are fixedly connected with the center shaft (100) and are respectively against the two ends of the annular air bag (200) in the axial direction, the center shaft (100) is internally provided with a gas charging flow channel (110) and a transfusion flow channel (120), one end of the gas charging flow channel (110) is communicated with one end of the center shaft (100), the other end is communicated with the annular air bag (200), the transfusion flow channel (120) penetrates through both ends of the center shaft (100), and the input end of the gas charging flow channel (110) and the input end of the transfusion flow channel (120) are located at the same end of the center shaft (100).

2. An inflatable tubular plug according to claim 1, wherein, It also includes a gas charging control device (500) and a transfusion control device (600), the gas charging control device (500) includes a gas charging pipeline (510) and a gas charging valve (520), the gas charging pipeline (510) is partially installed in the gas charging flow channel (110), the input end of the gas charging pipeline (510) is stretched out of the gas charging flow channel (110), and the gas charging valve (520) is installed at the input end of the gas charging pipeline (510); the transfusion control device (600) includes a transfusion pipeline (610) and a transfusion valve (620), the transfusion pipeline (610) is partially installed in the transfusion flow channel (120), the input end of the transfusion pipeline (610) is stretched out of the transfusion flow channel (120), and the transfusion valve (620) is installed at the input end of the transfusion pipeline (610).

3. An inflatable tubular plug according to claim 2, wherein, The inner wall of the gas charging pipeline (510) is installed with an inductive device (700), and the inductive device (700) is used for detecting the air pressure inside the annular air bag (200).

4. An inflatable tubular plug according to claim 3, wherein, It also includes a control module, the inductive device (700) is a pressure sensor, the gas charging valve (520) is an electric control valve, and the control module is electrically connected with the inductive device (700) and the electric control valve.

5. An inflatable tubular plug according to claim 1, wherein, The outside of the center shaft (100) is also nested with a first sealing member (130) and a second sealing member (140), the first sealing member (130) is located between the first cover plate (300) and the annular air bag (200), and the second sealing member (140) is located between the second cover plate (400) and the annular air bag (200).

6. An inflatable tubular plug according to claim 5, wherein, The first sealing member (130) and the second sealing member (140) are both made of rubber.

7. An inflatable tubular plug according to claim 1, wherein, The first cover plate (300) and the center shaft (100) and the second cover plate (400) and the center shaft (100) are all connected through sealing glue.

8. An inflatable tubular plug according to claim 1, wherein, The air bag and the center shaft (100) are connected through adhesive.

9. An inflatable tubular plug according to any one of claims 1 to 8, wherein, It also includes two pull handles (310) installed on the first cover plate (300), and the two pull handles (310) are arranged in parallel.

10. An inflatable tubular plug according to claim 9, wherein, The pull handle (310) is welded with the first cover plate (300).

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