Pipeline trepanning tool capable of extracting arc plate

Abstract

The utility model discloses a pipeline trepanning cutter capable of extracting an arc plate, and relates to the field of pipeline trepanning cutters, a mounting cavity with a lower opening is arranged in a cutter body, and a mounting sleeve communicated with the mounting cavity is arranged at the circle center of the upper side of the cutter body; a mounting column is fixed to the upper end of the center drill body and detachably fixed in the mounting sleeve, the lower end of the center drill body extends to the position below the cutter body from the mounting cavity, a drill bit body is fixed to the position below the center drill body, a plurality of receding grooves are sequentially formed in the side wall of the center drill body from top to bottom at intervals, and a cylindrical cavity is formed in the lower end of the center drill body; the cylindrical cavity is communicated with a receding groove in the lower end of the center drill body; one end of a torsional spring in the clamping spring mechanism is fixed in the cylindrical cavity, the other end of the torsional spring is connected with a rotating block, one end of a rotating rod is connected with the rotating block and penetrates into the receding groove to be connected with a limiting clamping rod, the limiting clamping rod is perpendicular to the rotating rod, and the other end of the limiting clamping rod extends to the outer side of the drill bit body. And by arranging the snap spring mechanism, falling of the arc plate can be limited, and falling is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline opening tools, in particular to a pipeline opening tool capable of extracting arc plates. Background Art

[0002] Hot tapping is a safe, environmentally friendly, economical and efficient in-service pipeline maintenance and repair technology, which is applicable to the normal maintenance and transformation of pipelines carrying various media such as water, crude oil, refined oil, chemical media, natural gas, etc., and the emergency repair of sudden accidents. The pipeline opening tool has a cylindrical cover-shaped structure, and cutter teeth are provided at the lower end of the opening.

[0003] In the prior art, Chinese Patent with publication number CN114799253A discloses a hot tapping tool, which includes a center drill, an opening tool fixed on the center drill, and a power mechanism for controlling the rotation of the opening tool. The characteristics are as follows: the opening tool includes a fixed disk horizontally fixed on the center drill, a cutter barrel detachably and vertically fixed on the lower end face of the fixed disk, an annular groove is formed on the inner wall of the cutter barrel, an annular elastic lining sleeve is embedded in the annular groove, the upper end face of the lining sleeve is flush with the upper end face of the cutter barrel, and the inner diameter of the lining sleeve is not greater than the inner diameter at the cutter teeth of the cutter barrel. This device is convenient for taking out the cut saddle. However, during the hot tapping operation of the pipeline without stopping the flow, the arc plate cut during the opening needs to be taken out from the pipeline. Traditional tools are internally provided with a magnetic attraction device to take out the arc plate by magnetic attraction. Due to reasons such as weakening of the magnetic force and the arc plate being stuck at the orifice, there is a great risk of the arc plate falling off. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pipeline opening tool capable of extracting arc plates to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides a pipeline opening tool capable of extracting arc plates, including:

[0006] A tool body, an installation cavity with an opening at the lower side is arranged inside the tool body, an installation sleeve communicated with the installation cavity is arranged at the center of the upper side of the tool body, and a connection head is fixedly connected to the upper end of the installation sleeve;

[0007] A center drill body, an installation column is fixed at the upper end of the center drill body, the installation column is detachably fixed in the installation sleeve, the lower end of the center drill body extends from the installation cavity to the lower side of the tool body, a drill bit body is fixed at the lower end of the center drill body, a plurality of avoidance grooves are sequentially arranged at intervals from top to bottom on the side wall of the center drill body, a cylindrical cavity is arranged at the lower end of the center drill body, and the cylindrical cavity is communicated with the avoidance groove located near the lower end of the tool body of the center drill body; and,

[0008] The snap ring mechanism includes a torsion spring, a rotating block, a rotating rod and a limiting clamping rod. One end of the torsion spring is fixed in the cylindrical cavity, the other end of the torsion spring is connected to the rotating block, one end of the rotating rod is connected to the rotating block and penetrates into the avoidance groove to be connected to the limiting clamping rod. The limiting clamping rod is perpendicular to the rotating rod, and the other end of the limiting clamping rod extends to the outside of the drill bit body for limiting the arc plate.

[0009] Furthermore, a blanking mechanism is also provided in the installation cavity for separating the arc plate from the installation cavity;

[0010] The blanking mechanism includes:

[0011] Two nut sleeves are respectively arranged on both sides of the installation sleeve,

[0012] Two threaded columns are respectively threadedly connected to the two nut sleeves and extend downward into the installation cavity; and,

[0013] A blanking ring plate is sleeved outside the center drill body, and the upper end of the blanking ring plate is rotationally connected to the lower ends of the two threaded columns through a rotating member.

[0014] Furthermore, a hand wheel is fixed to the upper end of the threaded column.

[0015] Furthermore, the outer side wall of the blanking ring plate is in frictional connection with the inner side wall of the installation cavity.

[0016] Furthermore, the length value of the limiting clamping rod is less than the height value of the notch of the avoidance groove.

[0017] Furthermore, a jack is provided on the side wall of the installation column, a threaded hole corresponding to the jack is provided on the side wall of the installation sleeve, and the installation sleeve and the installation column are threadedly connected through a fastening bolt to the threaded hole and inserted into the jack.

[0018] Furthermore, the diameter of the drill bit body is greater than the diameter of the center drill body.

[0019] Furthermore, a round hole communicating with the cylindrical cavity is provided on the inner wall of the avoidance groove, and the inner wall of the round hole is rotationally connected to the rotating rod.

[0020] Compared with the prior art, the beneficial effects of the present utility model are:

[0021] When using this device for pipe hole opening processing, the drill bit body first contacts the pipe to open an inner hole, and then the tool body contacts the pipe for hole opening processing. The cut pipe piece is an arc plate. When the center drill body continues to move downward, the limit clamping rod is restricted by the arc plate and starts to swing upward. At this time, the rotating block fixed to the rotating rod rotates in the cylindrical cavity, and the torsion spring generates elastic force under the rotational extrusion force until the limit clamping rod swings to the inside of the avoidance groove. At this time, the center drill body continues to move downward, and the limit clamping rod loses contact with the arc plate. Using the elastic reset function of the torsion spring, the limit clamping rod automatically swings downward and resets, which can limit the falling of the arc plate, so as to ensure that the arc plate is taken out of the pipe and prevent it from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic structural diagram of a pipe hole opening tool capable of extracting an arc plate provided by the present utility model;

[0023] Figure 2 is Figure 1 front view sectional structural diagram of;

[0024] Figure 3 is Figure 1 structural diagram of the tool body in;

[0025] Figure 4 is Figure 1 structural diagram of the center drill body in;

[0026] Figure 5 is Figure 4 top view sectional structural diagram of the lower end of the center drill body in.

[0027] In the figure: 1. Tool body; 11. Installation cavity; 12. Installation sleeve; 121. Threaded hole; 13. Connector; 2. Center drill body; 21. Installation column; 211. Insertion hole; 22. Drill bit body; 23. Avoidance groove; 24. Cylindrical cavity; 3. Snap ring mechanism; 31. Torsion spring; 32. Rotating block; 33. Rotating rod; 34. Limit clamping rod; 4. Stripping mechanism; 41. Nut sleeve; 42. Threaded column; 43. Rotating part; 44. Stripping ring plate; 45. Handwheel; 5. Fastening bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Please refer to Figures 1 to 5As shown in the figure, the utility model provides a pipe hole - opening tool for extracting arc - shaped plates, which includes a tool body 1, a center drill body 2, and a snap - ring mechanism 3. An installation cavity 11 with an opening at the lower part is arranged inside the tool body 1. At the center of the upper side of the tool body 1, an installation sleeve 12 communicating with the installation cavity 11 is provided. A connection head 13 is fixedly connected to the upper end of the installation sleeve 12. An installation column 21 is fixed to the upper end of the center drill body 2. The installation column 21 is detachably fixed inside the installation sleeve 12. The lower end of the center drill body 2 extends from the installation cavity 11 to the lower part of the tool body 1. A drill bit body 22 is fixed to the lower part of the center drill body 2. A plurality of relief grooves 23 are sequentially arranged at intervals from top to bottom on the side wall of the center drill body 2. A cylindrical cavity 24 is arranged at the lower end of the center drill body 2. The cylindrical cavity 24 communicates with the relief groove 23 located near the lower end of the center drill body 2 and close to the tool body 1. The snap - ring mechanism 3 includes a torsion spring 31, a rotating block 32, a rotating rod 33, and a limit clamping rod 34. One end of the torsion spring 31 is fixed inside the cylindrical cavity 24. The other end of the torsion spring 31 is connected to the rotating block 32. One end of the rotating rod 33 is connected to the rotating block 32 and penetrates into the relief groove 23 to be connected with the limit clamping rod 34. The limit clamping rod 34 is perpendicular to the rotating rod 33, and the other end of the limit clamping rod 34 extends to the outside of the drill bit body 22 for limiting the arc - shaped plate.

[0029] When using this device for pipe hole - opening processing, the drill bit body 22 first contacts the pipe to open an inner hole, and then the tool body 1 contacts the pipe for hole - opening processing. The cut - off pipe part is an arc - shaped plate. When the center drill body 2 continues to move downward, the limit clamping rod 34 is restricted by the arc - shaped plate and starts to swing upward. At this time, the rotating block 32 fixed to the rotating rod 33 rotates in the cylindrical cavity 24, and the torsion spring 31 generates an elastic force under the rotational extrusion force until the limit clamping rod 34 swings to the inner side of the relief groove 23. At this time, the center drill body 2 continues to move downward, the limit clamping rod 34 loses contact with the arc - shaped plate, and by the elastic - force reset function of the torsion spring 31, the limit clamping rod 34 automatically swings downward to reset, which can limit the falling of the arc - shaped plate, thereby ensuring that the arc - shaped plate is taken out of the pipe and preventing it from falling off. During this process, the elastic force of the torsion spring 31 is sufficient to support the own weight of the arc - shaped plate.

[0030] Further, as shown in Figure 2 the figure, a material - discharging mechanism 4 is further arranged inside the installation cavity 11 for separating the arc - shaped plate from the installation cavity 11. The material - discharging mechanism 4 includes two nut sleeves 41, two threaded columns 42, and a material - discharging ring plate 44. The two nut sleeves 41 are respectively arranged on both sides of the installation sleeve 12. The two threaded columns 42 are respectively threadedly connected to the two nut sleeves 41 and extend downward into the installation cavity 11. The material - discharging ring plate 44 is sleeved outside the center drill body 2. The upper end of the material - discharging ring plate 44 is rotatably connected to the lower ends of the two threaded columns 42 through a rotating member 43.

[0031] When it is necessary to remove the arc plate, just rotate the two threaded columns 42 synchronously. At this time, the two threaded columns 42 move downward synchronously, which can push the stripping ring plate 44 to move downward in the tool body 1, eject the arc plate from the tool body 1, and realize material stripping. During this process, the limit clamping rod 34 will swing downward under the extrusion of the arc plate, and then automatically reset under the elastic force of the torsion spring.

[0032] Preferably, a handwheel 45 is fixed to the upper end of the threaded column 42. By rotating the handwheel 45, it is convenient to operate and labor-saving, and the threaded column 42 can be easily rotated.

[0033] Specifically, the outer side wall of the stripping ring plate 44 is frictionally connected to the inner side wall of the installation cavity 11, which is convenient for the stripping ring plate 44 to have stable displacement.

[0034] Specifically, the length value of the limit clamping rod 34 is less than the height value of the notch of the avoidance groove 23, which is convenient for the limit clamping rod 34 to swing and prevents the avoidance groove 23 from interfering with the rotation of the limit clamping rod 34.

[0035] Specifically, a jack 211 is provided on the side wall of the mounting post 21, a threaded hole 121 corresponding to the jack 211 is provided on the side wall of the mounting sleeve 12, and the mounting sleeve 12 and the mounting post 21 are threadedly connected through a fastening bolt 5 with the threaded hole 121 and inserted into the jack 211.

[0036] By threadedly connecting the fastening bolt 5 with the threaded hole 121, the installation and disassembly are convenient.

[0037] Preferably, the diameter of the drill bit body 22 is larger than the diameter of the center drill body 2, which is convenient for the limit clamping rod 34 to swing in the avoidance groove 23.

[0038] Specifically, a round hole communicating with the cylindrical cavity 24 is provided on the inner wall of the avoidance groove 23, and the inner wall of the round hole is rotatably connected to the rotating rod 33. It is convenient for the rotating rod 33 to rotate and helps to limit the rotating block 32.

[0039] The above-mentioned is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A pipe hole opening tool capable of extracting arc plates, characterized in that: include: A tool body, wherein a mounting cavity with a lower opening is provided in the tool body, a mounting sleeve communicating with the mounting cavity is provided at the center of the upper circle of the tool body, and a connector is fixedly connected to the upper end of the mounting sleeve; A center drill body, a mounting column is fixed to the upper end of the center drill body, the mounting column is detachably fixed in the mounting sleeve, the lower end of the center drill body extends from the mounting cavity to the bottom of the tool body, a drill body is fixed to the bottom of the center drill body, a plurality of avoidance grooves are sequentially spaced from top to bottom on the side wall of the center drill body, a cylindrical cavity is provided at the lower end of the center drill body, and the cylindrical cavity is communicated with the avoidance groove located at the lower end of the center drill body near the tool body; and, The retaining spring mechanism includes a torsion spring, a rotating block, a rotating rod and a limiting clamping rod. One end of the torsion spring is fixed in the cylindrical cavity, and the other end of the torsion spring is connected to the rotating block. One end of the rotating rod is connected to the rotating block and passes through the avoidance groove to be connected to the limiting clamping rod. The limiting clamping rod is perpendicular to the rotating rod, and the other end of the limiting clamping rod extends to the outside of the drill body for limiting the arc plate.

2. The pipe hole opening tool capable of extracting an arc plate according to claim 1, characterized in that: The installation cavity is also provided with a material removal mechanism for removing the arc plate from the installation cavity; The stripping mechanism comprises: Two nut sleeves are respectively arranged on two sides of the mounting sleeve; Two threaded columns are respectively threadedly connected to the two nut sleeves and extend downward into the installation cavity; and, The stripping ring plate is sleeved on the outer side of the central drill body, and the upper end of the stripping ring plate is rotatably connected to the lower ends of the two threaded columns through a rotating member.

3. The pipe hole opening tool capable of extracting an arc plate according to claim 2, characterized in that: A hand wheel is fixed to the upper end of the threaded column.

4. The pipe hole opening tool capable of extracting an arc plate according to claim 2, characterized in that: The outer side wall of the stripping ring plate is frictionally connected to the inner side wall of the mounting cavity.

5. The pipeline hole-opening tool capable of extracting an arc plate according to claim 1, characterized in that: The length of the limit clamping rod is smaller than the height of the avoidance groove notch.

6. The pipeline hole-opening tool capable of extracting an arc plate according to claim 1, characterized in that: The side wall of the mounting column is provided with an insertion hole, the side wall of the mounting sleeve is provided with a threaded hole corresponding to the insertion hole, the mounting sleeve and the mounting column are threadedly connected with the threaded hole through a fastening bolt and inserted into the insertion hole.

7. The pipe hole opening tool capable of extracting an arc plate according to claim 1, characterized in that: The diameter of the drill bit body is greater than the diameter of the center drill body.

8. The pipeline hole-opening tool capable of extracting an arc plate according to claim 1, characterized in that: A circular hole communicating with the cylindrical cavity is formed on the inner wall of the avoidance groove, and the inner wall of the circular hole is rotatably connected to the rotating rod.

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