Pipeline pressure tapping device

Abstract

The utility model relates to a pipeline pressure tapping device, which is mounted on a ball valve on the outer wall of a pipeline, and comprises a sealing sleeve in threaded connection with the ball valve, and a scrap storage hole for storing scrap iron is formed in the sealing sleeve; the first sealing ring is positioned between the sealing sleeve and the ball valve; the pressing sleeve is in threaded connection with the sealing sleeve; the pressing wire is in threaded connection with the pressing sleeve; the connector is arranged in the pressing wire, the pressing sleeve and the sealing sleeve in a penetrating manner; the drill bit is fixed to the head of the connector; the second sealing ring is positioned between the sealing sleeve and the connector; and the third sealing ring is positioned between the pressing wire and the connector. According to the tapping device, the scrap storage hole is formed in the sealing sleeve, so that scrap iron generated by drilling a pipeline can be temporarily stored in the scrap storage hole in the process of tapping the pipeline under pressure, the scrap iron is not directly discharged from the tapping device, the influence of scrap removal on the sealing performance of the tapping device is reduced, and the service life of the tapping device is prolonged. And the sealing performance of the tapping device in the drilling process and the safety of drilling personnel are improved.

Description

Technical Field

[0001] This application relates to the field of live tapping of pipelines, and in particular to a live tapping device for pipelines. Background Technology

[0002] With the development of technology, the technology of hot tapping of pipelines has become more and more mature, such as hot tapping of heating pipelines and gas pipelines.

[0003] The common process for hot tapping of pipelines usually involves pre-welding a ball valve onto the pipeline, or pre-welding a base and threading the ball valve onto the base. Then, the hot tapping device is installed on the ball valve, and the pipe is tapped through the ball valve. During the drilling process, the metal filings produced by the drill bit need to be removed. These filings are discharged through the gaps between the connector and the ball valve, sealing sleeve, clamping sleeve, and pressure wire. This causes the metal filings to easily rub or scrape against the sealing ring and other components that are sealed to the connector, resulting in a decrease in the sealing performance of the structure and water leakage. This seriously affects the safety of the drilling personnel. Summary of the Invention

[0004] In order to reduce the impact of chip removal on the sealing performance of the drilling device during the process of drilling pipes under pressure, this application provides a pipe drilling device under pressure. By opening a chip storage hole inside the sealing sleeve, the iron chips generated during the drilling process can be temporarily stored in the chip storage hole, instead of being directly discharged into the drilling device. This reduces the impact of chip removal on the sealing performance of the drilling device, improves the sealing performance of the drilling device during the drilling process, and enhances the safety of drilling personnel.

[0005] This application provides a pipe hot tapping device, which adopts the following technical solution:

[0006] A pipe pressurized tapping device, comprising:

[0007] The sealing sleeve is threaded onto the ball valve and has a chip storage hole formed inside for storing iron filings.

[0008] The first sealing ring is located between the sealing sleeve and the ball valve;

[0009] The compression sleeve is threaded onto the sealing sleeve;

[0010] The pressure wire is threaded onto the clamping sleeve.

[0011] The connector is inserted inside the pressure wire, the clamping sleeve, and the sealing sleeve;

[0012] The drill bit is fixed to the head of the connector;

[0013] The second sealing ring is located between the sealing sleeve and the connector; and

[0014] The third sealing ring is located between the pressure wire and the connector.

[0015] Preferably, the chip storage hole is cylindrical.

[0016] Preferably, an O-ring is provided between the compression sleeve and the sealing sleeve.

[0017] Preferably, the first sealing ring is a PTFE gasket.

[0018] Preferably, both the second and third sealing rings are shaft seal rings.

[0019] Preferably, the number of the third sealing rings is two.

[0020] In summary, this application includes the following beneficial technical effects:

[0021] 1. This application provides a chip storage hole inside the sealing sleeve, which allows the iron filings generated during the pressurized drilling process to be temporarily stored in the chip storage hole instead of being directly discharged from the drilling device. This reduces the impact of chip discharge on the sealing performance of the drilling device, improves the sealing performance of the drilling device during the drilling process, and enhances the safety of the drilling personnel.

[0022] 2. This application further improves the sealing performance between the compression sleeve and the sealing sleeve by adding an O-ring between the compression sleeve and the sealing sleeve.

[0023] 3. By setting two third sealing rings and using PTFE gaskets for the first sealing ring, this application further improves the overall sealing performance of the drilling device, thereby indirectly improving the safety of drilling personnel during drilling. Attached Figure Description

[0024] Figure 1 This is an isometric view of the pipe pressurized tapping device in the embodiments of this application.

[0025] Figure 2 yes Figure 1 A schematic diagram of the full cross-section structure.

[0026] Figure 3 This is a full cross-sectional structural diagram of the sealing sleeve and the compression sleeve in the embodiments of this application.

[0027] Explanation of reference numerals in the attached drawings: 100, ball valve; 11, sealing sleeve; 111, first clearance groove; 112, second clearance groove; 113, chip storage hole; 114, fourth clearance groove; 12, first sealing ring; 13, clamping sleeve; 131, third clearance groove; 14, pressure wire; 15, connector; 16, drill bit; 17, second sealing ring; 18, third sealing ring; 19, O-ring seal. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] This application discloses a pipe hot tapping device.

[0030] Reference Figure 1 and Figure 2 The pipeline pressurized tapping device is installed and fixed on the ball valve 100 on the outer wall of the pipeline. When it is necessary to use this tapping device to tap the pipeline under pressure, a ball valve 100 or a base 200 needs to be welded to the outer wall of the pipeline beforehand. The base 200 is hollow inside. Then, the ball valve 100 is threaded onto the base, and the ball valve 100 communicates with the interior of the base 200. At the same time, when installing the ball valve 100 onto the base 200, a corresponding sealing ring or gasket, such as a PTFE gasket or an O-ring, needs to be placed in the groove opened on the base 200 beforehand to seal the gap between the ball valve 100 and the base 200. Then, the tapping device is installed and fixed onto the ball valve 100. Specifically, the tapping device can be connected to the ball valve 100 by a threaded connection.

[0031] Reference Figure 1 and Figure 2 The pipe pressurized tapping device includes a sealing sleeve 11, a first sealing ring 12, a clamping sleeve 13, a pressure wire 14, a connector 15, a drill bit 16, a second sealing ring 17, and a third sealing ring 18.

[0032] Reference Figure 2 and Figure 3 The sealing sleeve 11 is threadedly connected to the ball valve 100, and the sealing sleeve 11 and the ball valve 100 are coaxially arranged. Specifically, the first sealing ring 12 is sleeved on the sealing sleeve 11, and the sealing sleeve 11 has a first relief groove 111 for accommodating the first sealing ring 12, which is placed in the first relief groove 111. In use, the sealing sleeve 11 is threadedly connected to the ball valve 100, and the first sealing ring 12 is pressed against the ball valve 100. In this embodiment, the first sealing ring 12 is a PTFE gasket; in other embodiments, the first sealing ring 12 may be other sealing rings or gaskets.

[0033] The clamping sleeve 13 is threadedly connected to the sealing sleeve 11, and the clamping sleeve 13 is located on the side of the sealing sleeve 11 away from the ball valve 100. The clamping sleeve 13 and the sealing sleeve 11 are coaxially arranged.

[0034] Reference Figure 2 and Figure 3 The pressure wire 14 is threadedly connected to the pressure sleeve 13, and the pressure wire 14 is located on the side of the pressure sleeve 13 away from the sealing sleeve 11. The pressure wire 14 and the pressure sleeve 13 are coaxially arranged.

[0035] The connector 15 passes through the pressure wire 14, the clamping sleeve 13, and the sealing sleeve 11. The drill bit 16 is detachably and fixedly connected to the head of the connector 15. The drill bit 16 is used to drill a hole in the pipe wall. Specifically, the drill bit 16 can pass through the ball valve 100 to drill a hole in the pipe wall. After drilling the pipe wall, the drill bit 16 can also extend out of the ball valve 100 and be stored separately in the sealing sleeve 11 so that the ball valve 100 can be closed smoothly. Then, the sealing sleeve 11 can be removed from the ball valve 100. The tail of the connector 15 can be connected to a power component, such as a motor or electric motor.

[0036] Reference Figure 2 and Figure 3 The second sealing ring 17 is located between the clamping sleeve 13 and the sealing sleeve 11, and is used to seal the space between the clamping sleeve 13 and the sealing sleeve 11. Specifically, a second clearance groove 112 is provided in the sealing sleeve 11, and the second sealing ring 17 is located in the second clearance groove 112. The second sealing ring 17 is sleeved on the connector 15, or the connector 15 passes through the second sealing ring 17. The second sealing ring 17 is a shaft seal, preferably a Y-type seal. During installation, the clamping sleeve 13 is threaded onto the sealing sleeve 11, and the second sealing ring 17 is pressed against the second clearance groove 112. The second sealing ring 17 can seal the space between the sealing sleeve 11 and the connector 15, as well as between the clamping sleeve 13 and the sealing sleeve 11.

[0037] Reference Figure 2 and Figure 3 The third sealing ring 18 is located between the pressure wire 14 and the clamping sleeve 13, and is used to seal the space between the pressure wire 14 and the clamping sleeve 13. Specifically, a third clearance groove 131 is provided in the clamping sleeve 13, and the third sealing ring 18 is located in the third clearance groove 131. The third sealing ring 18 is sleeved on the connector 15, or in other words, the connector 15 passes through the third sealing ring 18. The third sealing ring 18 is a shaft seal, preferably a Y-type seal. During installation, the pressure wire 14 is threaded onto the clamping sleeve 13, and the third sealing ring 18 is pressed against the third clearance groove 131. The third sealing ring 18 can seal the space between the clamping sleeve 13 and the connector 15, as well as the space between the pressure wire 14 and the clamping sleeve 13.

[0038] Reference Figure 2 and Figure 3 In addition, in order to improve the sealing performance, two third sealing rings 18 can be installed in the third clearance groove 131, and the two third sealing rings 18 are arranged side by side.

[0039] To reduce the impact of drill chips from the drill bit 16 on the second sealing ring 17 and the third sealing ring 18 during the discharge process, a chip storage hole 113 is formed inside the sealing sleeve 11. In this embodiment, the chip storage hole 113 is cylindrical. In other embodiments, the chip storage hole 113 can also be a cuboid or prism shape or other three-dimensional structure. Since the chip storage hole 113 is not easy to drill, the sealing sleeve 11 can be a casting.

[0040] Reference Figure 2 and Figure 3 During the process of drill bit 16 drilling the pipe wall, the chip storage hole 113 can store the iron chips generated by drill bit 16 drilling the pipe, instead of directly discharging the iron chips along the connector 15.

[0041] To further improve the sealing performance between the compression sleeve 13 and the sealing sleeve 11, a fourth relief groove 114 is provided inside the sealing sleeve 11. An O-ring 19 is embedded in the fourth relief groove 114. The O-ring 19 further seals the compression sleeve 13 and the sealing sleeve 11. The O-ring 19 is located between the external thread of the compression sleeve 13 and the second sealing ring 17. At the same time, the front end of the external thread on the compression sleeve 13 is a smooth surface, which seals with the O-ring 19.

[0042] Reference Figure 2 and Figure 3 In use, first connect the sealing sleeve 11 to the ball valve 100 by thread, and make the sealing sleeve 11 press against the first sealing ring 12 against the ball valve 100. Then open the ball valve 100, and use the connector 15 to pass the drill bit 16 through the ball valve 100 and extend it to the pipe wall. Then use the power component to drive the connector 15 to rotate, and the connector 15 drives the drill bit 16 to rotate. The drill bit 16 drills a hole in the pipe wall and discharges the iron filings generated during the drilling process and stores them in the filings storage hole 113. Try to make the volume of the filings storage hole 113 large enough to accommodate the iron filings generated when drilling through the pipe wall in one go. Then slowly pull the connector 15 outward so that the drill bit 16 passes through the ball valve 100 and retracts into the sealing sleeve 11. Then close the ball valve 100. At this point, the pressurized opening of the pipeline is completed.

[0043] In addition, if the chip storage hole 113 cannot accommodate all the iron filings generated during drilling of the pipe wall at once, the sealing sleeve 11 and the ball valve 100 can be repeatedly disassembled and reassembled during the drilling process. After each disassembly, the iron filings in the chip storage hole 113 are emptied, and then the sealing sleeve 11 is reinstalled on the ball valve 100, and drilling continues. This process is repeated to allow the iron filings generated during drilling to be discharged in batches until the pipe wall is drilled through. Each time the sealing sleeve 11 is removed from the ball valve 100, the ball valve 100 must be closed to prevent the pressure inside the pipe from puncturing the thinner drilled section and causing personal injury to the drilling personnel, thus improving the safety of the drilling personnel.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe pressurized tapping device, characterized in that, include: The sealing sleeve is threaded onto the ball valve and has a chip storage hole formed inside for storing iron filings. The first sealing ring is located between the sealing sleeve and the ball valve; The compression sleeve is threaded onto the sealing sleeve; The pressure wire is threaded onto the clamping sleeve. The connector is inserted inside the pressure wire, the clamping sleeve, and the sealing sleeve; The drill bit is fixed to the head of the connector; The second sealing ring is located between the sealing sleeve and the connector; and The third sealing ring is located between the pressure wire and the connector.

2. The pipe pressurized tapping device according to claim 1, characterized in that, The chip storage hole is cylindrical.

3. The pipe pressurized tapping device according to claim 1, characterized in that, An O-ring is also provided between the compression sleeve and the sealing sleeve.

4. The pipe pressurized tapping device according to claim 1, characterized in that, The first sealing ring is a PTFE gasket.

5. A pipe pressurized tapping device according to claim 1, characterized in that, Both the second and third sealing rings are shaft seal rings.

6. The pipe pressurized tapping device according to claim 1, characterized in that, The number of the third sealing rings is two.

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