Low-pressure pipeline trepanning branch pipe connector

Abstract

The invention belongs to the technical field of pipeline tapping equipment, and particularly relates to a low-pressure pipeline tapping branch pipe connector. Comprising a pipeline, a first pipe set and a second pipe set, the first pipe set and the second pipe set are vertically installed on the pipeline, sealing mechanisms are arranged in the middles of the first pipe set and the second pipe set, a four-way branch pipeline is further arranged at the upper end of the first pipe set, a tapping mechanism is connected to the top of the branch pipeline, and the left end of the branch pipeline is connected with a sealing end cover. The right end of the branch pipeline is provided with a detachably connected filtering pipeline, the right side of the filtering pipeline is connected with a bent pipe, the other end of the bent pipe is connected with the top of the second pipe set, and flange connecting pieces are arranged at the joints of the first pipe set, the branch pipeline, the filtering pipeline, the bent pipe and the second pipe set. According to the low-pressure pipeline trepanning branch pipe connector, chippings generated during trepanning can be collected, meanwhile, cut-off metal blocks are adsorbed, it is guaranteed that circulating oil gas is pure and free of impurities, a sectional structure can be freely assembled, the construction efficiency is improved, and the construction safety is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline opening equipment, and in particular relates to a low-pressure pipeline opening branch pipe connector. Background Art

[0002] In industrial systems like oil and gas, oil and gas pipelines are crucial links connecting all processes. They not only transport oil and gas but also maintain the normal operation of the entire system. Problems in these pipelines, such as leaks or blockages, can directly impact the stable operation of the entire system and may even lead to production interruptions or accidents. Therefore, the integrity and reliability of these pipelines are crucial to ensuring the normal operation of these industrial systems. When a pipeline failure requires prompt attention, hot tapping involves mechanically cutting a circular hole in the operating pipeline under closed conditions, without interrupting production or disrupting the flow of the medium within the pipeline. This allows for the installation of new pipe joints or instrumentation within the pipeline, tank, or process line while maintaining normal production. When branch lines need to be installed on existing pipelines, hot tapping is employed. This approach ensures safety, efficiency, and environmental protection without disrupting normal pipeline operation. Therefore, hot tapping is widely used in oil and gas pipelines.

[0003] Authorization announcement number CN104029248B discloses a pressurized PE gas pipeline hole opener, comprising a T-wrench connected to a sealing hole cap, which in turn is connected to a saddle-shaped bypass pipe that mates with the pressurized gas pipeline. The sealing hole cap comprises a sealing inner cap and a sealing outer cap, the inner cap mates with the T-wrench via a positioning slot, and the inner cap is threadedly connected to the outer cap via a positioning key. The saddle-shaped bypass pipe is an electrofusion bypass pipe, which is provided with a connecting pipe and a vent pipe on one side of the connecting pipe. The outer wall of the connecting pipe head is provided with an external thread, and the lower inner wall of the sealing outer cap is provided with an internal thread, which mates with the external thread. A drill is placed in the connecting pipe and connected to the T-wrench. The electrofusion bypass pipe mates with the pressurized gas pipeline via a hanger and is secured by a fastening device. This solution is highly safe, simple to operate, low-cost, and highly responsive. In this structure, a T-wrench is used to drive the drill hole to spin open a hole in the pressurized gas pipeline. A branched vent pipe is then used as a temporary conduit for ventilation, enabling non-stop operation under pressure. In large-diameter oil and gas pipeline operations, the high oil and gas flow rate after drilling places higher demands on the sealing and screw-in control of the hole opener. Furthermore, oil and gas pipelines are made of metal, which generates a large amount of metal debris and cake-like metal chunks during drilling. If not promptly addressed, this will not only hinder oil and gas transportation but also affect oil and gas quality. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned background technology, and to provide a low-pressure pipeline opening branch pipe connector, which can be manually screwed into the electric opening of the metal pipeline to avoid damage to the drill tool caused by the pressure impact in the pipeline during the opening. A filter pipe is installed at the pipeline branch pipe joint to collect the debris generated during the opening. At the same time, the magnetic suction block fixedly connected in the drill tool absorbs the cut metal blocks to ensure that the circulating oil and gas are pure and free of impurities. The segmented structure can be freely assembled, which improves construction efficiency and ensures construction safety.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a low-pressure pipeline opening branch pipe connector, comprising a pipeline, a first pipe group and a second pipe group vertically installed on the pipeline, the middle parts of the first pipe group and the second pipe group are both provided with a closing mechanism, the upper end of the first pipe group is also provided with a four-way branch pipe, the top of the branch pipe is connected to the opening mechanism, the left end is connected to the closed end cover, and the right end is provided with a detachable filter pipe, the right side of the filter pipe is connected to a bend pipe, and the other end of the bend pipe is connected to the top of the second pipe group, and the connections between the first pipe group, the branch pipe, the filter pipe, the bend pipe and the second pipe group are all provided with flange connectors.

[0006] Furthermore, the sealing mechanism includes a sealing tube vertically connected to the middle of the first tube group / second tube group, the interior of the sealing tube is connected to the first tube group / second tube group, and a plug that fits the inner wall is also provided in the sealing tube. One end of the sealing tube is closed and the other end is connected to a rotating shaft. The inner end face of the rotating shaft is connected to the plug, and the outer end face is also connected to a rotating handle.

[0007] Furthermore, the hole opening mechanism includes a sealing tube, a hole opener, a drive shaft, a detachable handle, a sealing cover and a support frame. The sealing tube is connected to the upper end of the branch pipeline, and sealing covers are installed at the upper and lower ends of the sealing tube. The center of the sealing cover is spirally connected to the drive shaft, the lower end of the drive shaft extends into the branch pipeline, and the end is fixedly connected to the hole opener. The upper end of the drive shaft is connected to the detachable handle, and the support frame is connected to the upper and lower ends of the sealing tube, and is equidistantly distributed outside the circumference of the sealing tube for reinforcing the sealing tube.

[0008] Furthermore, filter covers are provided at both ends of the filter pipe, the raised portion of the filter cover is reversely installed in the filter pipe, and an annular magnet is provided at the bottom of the inner wall of the filter cover.

[0009] Furthermore, the flange connector includes a first flange, a second flange, a first gasket and a second gasket. Step grooves are provided on the opposing surfaces of the first flange and the second flange. The first gasket and the second gasket are also provided with convex rings. The convex rings are engaged with the step grooves to limit the first gasket in the first flange and the second gasket in the second flange.

[0010] Furthermore, a group of annular grooves are formed on the outer contour of the plug, and flexible gaskets are clamped in the annular grooves.

[0011] Furthermore, the hole opener has a circular cross-section, is provided with serrations at the end, and is provided with a strong magnet inside the hole opener.

[0012] The beneficial effects of the present invention are: 1) The present invention is provided with a hole opening mechanism, which seals and isolates the drive shaft from the lower branch pipeline through the upper and lower side sealing covers, thereby improving the sealing effect and preventing excessive pressure in the pipe from causing oil and gas to leak into the hole opening mechanism. A strong magnet is installed in the hole opener at the lower end of the drive shaft, which can absorb the debris and cut metal blocks generated when the hole opener peels the pipeline, preventing them from entering the subsequent pipeline and causing damage, thereby affecting the quality of oil and gas.

[0013] 2) The present invention sets up a branch pipeline, and seals the oil and gas pipeline, the opening mechanism, and the temporary pipe group through a four-way flange connector to form an opening connector with flow diversion. Each component can be disassembled and assembled separately, which is convenient for carrying and transportation.

[0014] 3) The present invention provides a filter pipe, which guides the oil and gas to flow along the filter holes toward the center of the filter cover through the reverse-installed filter cover. At this time, the annular magnet on the inner bottom will perform secondary adsorption and filtration on the passing oil and gas, so that the metal chips left over from cutting are adsorbed and filtered, thereby improving the quality of the oil and gas. The filter cover is installed at the flange connection and can be manually replaced to ensure the filtering and adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a cross-sectional view of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the closing mechanism in the present invention.

[0018] Figure 4 It is a structural schematic diagram of the hole-opening mechanism in the present invention.

[0019] Figure 5 It is a structural schematic diagram of the filtration pipeline in the present invention.

[0020] Figure 6 It is a structural schematic diagram of the flange connection in the present invention.

[0021] Figure 7 It is a connection diagram of the filter cover in the present invention.

[0022] Figure 8 It is a structural schematic diagram of the plug in the present invention.

[0023] In the figure: 1. pipeline; 2. first pipe group; 3. second pipe group; 4. closing mechanism; 5. branch pipeline; 6. opening mechanism; 7. closing end cover; 8. filter pipeline; 9. flange connector; 10. blocking pipe; 11. plug; 12. rotating shaft; 13. rotating handle; 14. sealing pipe; 15. hole opener; 16. driving shaft; 17. detachable handle; 18. blocking cover; 19. supporting frame; 20. filter cover; 21. annular magnet; 22. first flange; 23. second flange; 24. first gasket; 25. second gasket; 26. stepped groove; 27. convex ring; 28. annular groove; 29. ​​flexible gasket; 30. serration; 31. strong magnet. DETAILED DESCRIPTION

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Embodiment: As shown in the figure, a low-pressure pipeline opening branch pipe connector described in the present invention includes a pipeline 1, a first pipe group 2 and a second pipe group 3 vertically installed on the pipeline 1, the middle parts of the first pipe group 2 and the second pipe group 3 are provided with a closing mechanism 4, and the upper end of the first pipe group 2 is also provided with a four-way branch pipe 5, the top of the branch pipe 5 is connected to the opening mechanism 6, the left end is connected to the closed end cover 7, and the right end is provided with a detachable filter pipe 8, the right side of the filter pipe 8 is connected to a bend, and the other end of the bend is connected to the top of the second pipe group 3, and the connections between the first pipe group 2, the branch pipe 5, the filter pipe 8, the bend and the second pipe group 3 are all provided with flange connectors 9.

[0026] In this embodiment, the branch pipe 5 is used as the installation platform for each functional structure. The upper part is used to install the hole-opening mechanism 6 to open a hole in the pipe 1, and the lower part is connected to the pipe 1. The left and right sides are used to connect functional pipes 1, such as the filter pipe 8 and the elbow, which can filter the debris generated during the hole-opening and guide the clean oil and gas to other pipelines. At the same time, after the hole-opening is completed, the hole-opening mechanism 6 can be removed to seal the upper part of the branch pipe 5, or a plugger can be installed in the pipe 1 to seal the horizontal opening of the pipe 1 after the hole is opened, so as to facilitate the subsequent cutting, replacement or maintenance of the main pipe 1. The various components are connected and sealed by flange connectors 9, and can be freely assembled and disassembled, which is convenient for carrying and transportation.

[0027] The sealing mechanism 4 includes a sealing tube 10 vertically connected to the middle of the first tube group 2 / second tube group 3. The interior of the sealing tube 10 is in continuous communication with the first tube group 2 / second tube group 3. A plug 11 is positioned within the sealing tube 10, conforming to the inner wall. One end of the sealing tube 10 is closed, and the other end is connected to a rotating shaft 12. The inner end surface of the rotating shaft 12 is connected to the plug 11, and the outer end surface is also connected to a rotating handle 13. The outer contour of the plug 11 is also defined by a set of annular grooves 28, into which a flexible gasket 29 is secured.

[0028] refer to Figure 1 Figure 3 and Figure 8 In this embodiment, the first pipe group 2 serves as the inflow pipe, and the second pipe group 3 serves as the outflow pipe, which are welded to the left and right sides of the pipeline 1 respectively. The leak point or repair is located between the first pipe group 2 and the second pipe group 3. The sealing mechanism 4 seals the first pipe group 2 / the second pipe group 3 to prevent leakage. Then, the branch pipe 5, the opening mechanism 6, the filter layer pipe 1 and the elbow are installed in sequence to connect the first pipe group 2 and the second pipe group 3. The left end of the branch pipe 5 is blocked by the closed end cover 7, which can also be used as an inspection port. Before assembly, the pipeline 1 needs to be sealed and isolated from the top and bottom by a plug 11 to facilitate the operation of the pipeline 1 without stopping the line. The flange connector 9 and various components can also be installed on its upper part.

[0029] Drilling operation after assembly: When the closing mechanism 4 is blocked, first install the branch pipes 5 on the first pipe group 2 and the second pipe group 3, and connect and seal both sides of the two branch pipes 5 through the closed end caps 7. Then install the drilling mechanism 6 on the branch pipes 5 in sequence. Taking the drilling of the first pipe group 2 as an example, first move the plug 11 to contact the plug, and drill the bottom pipe 1 through the motor-assisted drive and manual rotation. At this time, reset the drilling mechanism 6 upward. After the drilling, the oil and gas flow to the first pipe group 2 and the branch pipe 5 through the channel. At this time, drive the plug 11 to seal the first pipe group 2. At this time, the upper drilling mechanism 6 can be removed and installed on the branch on the right. 4. After the holes on both ends are opened and blocked, the two side ports of the two branch pipes 5 are disassembled, and the filter pipe 8 and the elbow are installed to connect the first pipe group 2 and the second pipe group 3. After confirming that the connection is tight and there is no leakage, the two sealing mechanisms 4 are released in turn, so that the oil and gas in the pipe 1 can flow smoothly through the first pipe group 2 to the second pipe group 3. The operation is convenient and equipment-saving. The various components can be detachably connected, which is also convenient for carrying and transportation. It is especially suitable for pipeline construction with complex terrain.

[0030] The hole-opening mechanism 6 includes a sealing tube 14, a hole-opener 15, a drive shaft 16, a detachable handle 17, a sealing cap 18, and a support frame 19. The sealing tube 14 is connected to the upper end of the branch pipeline. The sealing caps 18 are installed at both the upper and lower ends of the sealing tube 14. The center of the sealing cap 18 is screwed onto the drive shaft 16. The lower end of the drive shaft 16 extends into the branch pipeline and the distal end is fixedly connected to the hole-opener 15. The upper end of the drive shaft 16 is connected to the detachable handle 17. The support frame 19 is connected to the upper and lower ends of the sealing tube 14 and is evenly spaced outside the circumference of the sealing tube 14 to reinforce the sealing tube 14. The hole-opener 15 has a circular cross-section and is provided with serrations 30 at the distal end. A strong magnet 31 is also provided inside the hole-opener 15.

[0031] refer to Figure 2 and Figure 4 In this embodiment, sealing covers 18 are installed at the upper and lower ends of the sealing tube 14. The sealing cover 18 has a hole in the center, and a threaded sealing seat is installed in the hole for spirally connecting the drive shaft 16 to the upper and lower ends of the sealing cover 18 so that the upper and lower ends of the drive shaft 16 extend outward, the lower part is fixed with the hole opener 15, and the upper part is connected with a detachable handle 17 or a coupling. The sealing tube 14 is tightly connected to the branch pipe 5 through the flange connector 9, and the hole opener 15 is accommodated in the branch pipe 5. When driving, it can be driven by a motor or manually driven by installing a detachable handle 17. The hole opener 15 is screwed downward by rotating the drive shaft 16 to vertically open the main line pipeline 1. The debris and cut metal blocks generated during the opening are attracted by the strong magnet 31 to avoid entering the pipeline and scratching the inner wall; the support frame 19 is used to reinforce the hole opening mechanism 6, and also serves as a mounting seat and fixed shaft of the external motor, which is convenient for installing a fixed motor and driving the drive shaft 16 to rotate through the coupling. After the hole opening is completed, the first tube group 2 / second tube group 3 is closed by the closing mechanism 4, the hole opening mechanism 6 can be disassembled, the metal block is removed and the residue of the pipeline 1 is cleaned, and then the branch pipeline 5 is blocked to complete the entire hole opening process.

[0032] Filter covers 20 are further provided at both ends of the filter pipe 8 . The raised portion of the filter cover 20 is reversely installed in the filter pipe 8 . An annular magnet 21 is further provided at the bottom of the inner wall of the filter cover 20 .

[0033] refer to Figure 5 and 7 In this embodiment, the filter cover 20 is a filter structure, which is installed in the filter layer pipe 1 in the same direction. The installation direction is opposite to the flow direction of the pipe 1, so that the oil and gas will first pass through the raised filter screen for filtration and blocking when passing through the filter screen. When passing through the filter screen, since the tail of the filter screen is raised, the oil and gas will flow toward the center of the filter cover 20 when passing through the filter hole and will be concentrated at the center of the filter cover 20. At this time, the adsorption capacity of the annular magnet 21 can be maximized to adsorb the remaining debris. Similarly, when flowing out, it will be adsorbed by the annular magnet 21 and then flow out from the filter hole to ensure that the adsorbed debris will not flow into other pipelines. The head of the filter cover 20 is tightly connected with the filter pipe 8 and the flange tightening piece. The size of its head is slightly larger than the inner diameter of the filter pipe 8, so that the filter cover 20 is fixed and limited after installation and will not be washed away or moved, thereby ensuring the filtering and adsorption effect.

[0034] The flange connector 9 includes a first flange 22, a second flange 23, a first gasket 24 and a second gasket 25. A second gasket 26 is provided on the opposite surfaces of the first flange 22 and the second flange 23. A convex ring 27 is also provided on the first gasket 24 and the second gasket 25. The convex ring 27 is engaged with the second gasket 26 to limit the first gasket 24 in the first flange 22 and the second gasket 25 in the second flange 23.

[0035] refer to Figure 6 In this embodiment, the first flange 22 / the second flange 23 are respectively fixed at the mouth of the pipe 1, and the inner circle of the first flange 22 / the second flange 23 is provided with an inward circular groove, so that the inner mouth thereof is formed in a stepped shape, and the corresponding first gasket 24 / the second gasket 25 is connected to the first flange 22 / the second flange 23, playing the role of flexible connection and sealing. At the same time, a convex ring 27 is provided at the corresponding position of the second gasket 26, so that the first gasket 24 / the second gasket 25 is fastened and limited when connected to the first flange 22 / the second flange 23, playing a fixing role. After the fastening connection, the other end surface of the first gasket 24 / the second gasket 25 is a flat surface, and the two flat surfaces are butted against each other and fixed by bolts, so that the flange tensioning member is fixed into a whole, which is tightly sealed and leak-proof, and is suitable for the connection of the low-pressure pipe 1.

[0036] The present invention provides an opening mechanism, which seals and isolates the driving shaft from the lower branch pipeline through the upper and lower sealing covers, thereby improving the sealing effect and preventing oil and gas from leaking into the opening mechanism due to excessive pressure in the pipe. A strong magnet is installed in the opening device at the lower end of the driving shaft, which can absorb the debris and cut metal blocks generated when the opening device rotates the pipeline to prevent them from entering the subsequent pipeline and causing damage, thereby affecting the oil and gas quality; a branch pipeline is provided, and the oil and gas pipeline, the opening mechanism, and the temporary pipeline group are sealed and connected through a four-way flange connector to form an opening connector with a flow guide, and each component can be disassembled and assembled separately for easy carrying and transportation; a filter pipeline is provided, and the oil and gas are guided to flow along the filter hole to the center of the inside of the filter cover through the reversely installed filter cover. At this time, the annular magnet on the inner bottom will perform secondary adsorption and filtration on the oil and gas passing through, so that the metal chips left over from the cutting are adsorbed and filtered, thereby improving the oil and gas quality. The filter cover is installed at the flange connector and can be manually replaced to ensure the filtering and adsorption effect.

[0037] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A low-pressure pipeline opening branch connector, characterized by: It includes a pipeline, a first pipe group and a second pipe group vertically installed on the pipeline, the middle parts of the first pipe group and the second pipe group are both provided with a closing mechanism, the upper end of the first pipe group is also provided with a four-way branch pipe, the top of the branch pipe is connected with an opening mechanism, the left end is connected to a closed end cover, and the right end is provided with a detachable filter pipe, the right side of the filter pipe is connected to a bend pipe, and the other end of the bend pipe is connected to the top of the second pipe group, and the connections between the first pipe group, the branch pipe, the filter pipe, the bend pipe and the second pipe group are all provided with flange connectors.

2. A low-pressure pipeline opening branch connector according to claim 1, characterized in that: The sealing mechanism includes a sealing tube vertically connected to the middle of the first tube group / second tube group. The interior of the sealing tube is connected to the first tube group / second tube group. A plug that fits the inner wall is also provided in the sealing tube. One end of the sealing tube is closed and the other end is connected to a rotating shaft. The inner end face of the rotating shaft is connected to the plug, and the outer end face is also connected to a rotating handle.

3. The low-pressure pipeline opening branch connector according to claim 1, characterized in that: The hole opening mechanism includes a sealing tube, a hole opener, a drive shaft, a detachable handle, a sealing cover and a support frame. The sealing tube is connected to the upper end of the branch pipeline, and sealing covers are installed at the upper and lower ends of the sealing tube. The center of the sealing cover is spirally connected to the driving shaft, the lower end of the driving shaft extends into the branch pipeline, and the end is fixedly connected to the hole opener. The upper end of the driving shaft is connected to the detachable handle. The support frame is connected to the upper and lower ends of the sealing tube, and is equidistantly distributed outside the circumference of the sealing tube for reinforcing the sealing tube.

4. The low-pressure pipeline opening branch connector according to claim 1, characterized in that: Filter covers are also provided at both ends of the filter pipe. The raised portion of the filter cover is reversely installed in the filter pipe. An annular magnet is also provided at the bottom of the inner wall of the filter cover.

5. The low-pressure pipeline opening branch connector according to claim 1, characterized in that: The flange connector includes a first flange, a second flange, a first gasket and a second gasket. Step grooves are provided on the opposing surfaces of the first flange and the second flange. The first gasket and the second gasket are also provided with convex rings. The convex rings are engaged with the step grooves to limit the first gasket in the first flange and the second gasket in the second flange.

6. The low-pressure pipeline opening branch connector according to claim 2, characterized in that: A group of annular grooves are also provided on the outer contour of the plug block, and flexible gaskets are clamped in the annular grooves.

7. The low-pressure pipeline opening branch connector according to claim 3, characterized in that: The hole opener has a circular cross section, a sawtooth is provided at the end, and a strong magnet is also provided inside the hole opener.

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