Anti-loosening pipeline trepanning device in pipeline pressure trepanning process

Abstract

The utility model discloses an anti-loosening pipeline trepanning device in a pipeline pressure trepanning process. The anti-loosening pipeline trepanning device comprises a trepanning cylindrical cutter and a center drill, a main machine drill rod is arranged on the trepanning cylindrical cutter through a mounting hole in the end plate; one end of the main machine drill rod penetrates through the mounting hole, a threaded hole is formed in the end face and is in threaded connection with the center drill, and a rod body located on the outer side of the end plate is sleeved with a tool combiner; the cutter combiner comprises an inner hole for arranging a main machine drill rod, and a plurality of mounting bolts are arranged around the inner hole; a hexagonal nut is arranged on an external thread of the center drill; the hexagon nut is sleeved with a limiting clamping piece. The limiting clamping piece comprises a limiting hole matched with the hexagon nut in shape and a kidney-shaped hole. The kidney-shaped hole corresponds to the projection position of any mounting bolt, the length of the kidney-shaped hole is bent into an arc with the axis of the corresponding limiting hole as the circle center, and the kidney-shaped hole is fastened with the end plate and the tool combiner through the corresponding mounting bolt, or the kidney-shaped hole is provided with a limiting fastening bolt to be fastened with the end plate. Displacement and over rotation of the center drill can be limited, and threaded connection failure is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline hole opening, in particular to a pipeline hole opening device for preventing loosening in a pipeline pressure hole opening process. Background Art

[0002] With the acceleration of urbanization, the gas pipeline network is becoming increasingly complex, and the demand for maintenance and renovation of gas pipelines is also increasing.

[0003] Traditional pipeline maintenance or renovation requires stopping gas delivery, which will bring inconvenience to users and even affect production and life. Therefore, the development of non-stop pressure drilling and plugging technology has become an important direction for gas pipeline maintenance.

[0004] The process of opening and sealing holes under pressure without stopping gas flow is an important technology in the field of gas pipeline maintenance. It improves the efficiency and safety of pipeline maintenance by reducing the inconvenience and risks caused by gas outages, and plays a key role in ensuring the stable operation of urban gas supply systems.

[0005] Compared with the traditional stop-flow construction, the pressure-drilling and plugging process without stopping the flow greatly shortens the construction time, improves the construction efficiency, and reduces the waste of resources and environmental pollution caused by gas release. With the continuous advancement of technology, the application of this process will become more extensive.

[0006] like Figure 1 and Figure 2 As shown in the figure, in the process of drilling holes under pressure, the center drill and the drilling cutter in the drilling manifold are the core equipment for drilling and cutting the pipeline. The center drill is connected to the drilling rod of the drilling machine by threads, and the tool coupler is a device that connects the drilling machine and the tool. The center drill is used to locate, guide and remove the saddle-shaped cutting plate, and assist the drill bit of the drilling cutter. In short, the center drill and the drilling cutter play a vital role in the process of drilling holes under pressure. They are not only related to the accuracy and efficiency of drilling, but also directly related to the safety of the entire drilling operation under pressure.

[0007] However, in the actual construction process, the following three problems were found to affect the smooth implementation of the opening operation:

[0008] 1. The connection between the center drill and the drill rod is not tight, resulting in excessive vibration of the main shaft of the drill rod of the hole-opening machine during the hole-opening operation.

[0009] 2. In the past, the central drill thread connection failed during the hot-drilling operation and fell into the pipe alone;

[0010] 3. In the past, the center drill and the hole cutter fell into the pipe together during the pressure hole opening operation;

[0011] The cause of the accident is analyzed as follows:

[0012] 1. During repeated disassembly, assembly and use, the threads of the threaded connection may wear and slip, causing the connection to loosen or fail.

[0013] 2. If the connector is over-tightened during installation, it may cause metal fatigue, thread deformation or breakage, resulting in connection failure.

[0014] 3. Threaded connections may become areas of stress concentration, especially when subjected to large loads or impact loads, which may also cause thread breakage or connection failure.

[0015] Therefore, how to limit the displacement of the center drill, over-rotation and avoid failure of the threaded connection to effectively ensure the smooth completion of the drilling operation has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0016] In view of the above-mentioned defects of the prior art, the utility model provides a pipeline hole-opening device for preventing loosening in the pipeline pressure opening process, the purpose of which is to limit the displacement and over-rotation of the center drill and avoid failure of the threaded connection, thereby effectively ensuring the smooth completion of the hole-opening operation.

[0017] To achieve the above purpose, the utility model discloses a pipeline hole-opening device for preventing loosening in a pipeline pressure hole-opening process, comprising a tubular hole-opening cylinder cutter and a center drill arranged at the axis position of the hole-opening cylinder cutter.

[0018] Wherein, the hole-opening cylinder cutter is provided with the main machine drill rod through the mounting hole on the end plate;

[0019] One end of the main drill rod is inserted into the mounting hole, the end face is flush with the side of the end plate facing the inner side of the hole-opening cylinder cutter, and a threaded hole is provided to form a threaded connection with the external thread of the center drill, and a tool coupler is provided on the rod body located outside the end plate;

[0020] The tool coupler comprises an inner hole matching the shape of the main machine drill rod, and a plurality of mounting bolts are arranged around the inner hole, passing through the tool coupler in the axial direction and being threadedly connected to the end plate, and are fastened to the end plate through the mounting bolts;

[0021] The external thread connecting the center drill and the main drill rod is provided with a hexagonal nut for preventing loosening;

[0022] The outer sleeve of the hexagonal nut is provided with a limiting clip;

[0023] The limiting clip includes a limiting hole matching the shape of the hexagonal nut, and a waist-shaped hole outside the limiting hole;

[0024] The waist-shaped hole corresponds to the projection position of any of the mounting bolts, the width matches the corresponding mounting bolt, and the length is curved into an arc with the axis of the corresponding limiting hole as the center. After the corresponding mounting bolt penetrates the tool coupler and the waist-shaped hole, the waist-shaped hole, the end plate and the tool coupler are fastened by setting a limiting fastening nut.

[0025] Alternatively, the waist-shaped hole is provided with a limiting fastening bolt to be fastened to the end plate.

[0026] Preferably, one end of the hole-opening cylinder cutter is provided with the end plate perpendicular to the axis, and the other end is provided with cutter teeth for opening holes.

[0027] Preferably, the end plate is provided with the mounting hole at a position corresponding to the axis of the hole-opening cylinder cutter, and the main machine drill rod is passed through the mounting hole.

[0028] Preferably, the outer shape of the tool coupler is stepped, and a flange-shaped structure extending in all directions is provided at one end close to the end plate.

[0029] Preferably, the limiting hole is a hexagonal hole or a twelve-pointed plum blossom hole that matches the shape of the hexagonal nut.

[0030] Preferably, the end plate is provided with a plurality of chip removal holes.

[0031] Beneficial effects of the utility model:

[0032] The utility model can limit the displacement and over-rotation of the center drill and avoid the failure of the threaded connection, thereby effectively ensuring the smooth completion of the hole opening operation.

[0033] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the longitudinal structure of the prior art is shown.

[0035] Figure 2 A schematic structural diagram of the inner side of an end plate in the prior art is shown.

[0036] Figure 3 A schematic diagram of the longitudinal structure of an embodiment of the utility model is shown.

[0037] Figure 4 A schematic structural diagram of the inner side of the end plate in one embodiment of the utility model is shown.

[0038] Figure 5 A schematic structural diagram of a position limiting clip in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0039] Example

[0040] like Figures 3 to 5 As shown, the pipeline hole-opening device for preventing loosening in the pipeline pressure hole-opening process includes a tubular hole-opening cylinder cutter 1 and a center drill 2 arranged at the axial position of the hole-opening cylinder cutter 1.

[0041] The hole-opening cylinder cutter 1 is provided with the main machine drill rod 3 through the mounting hole on the end plate 12;

[0042] One end of the main drilling rod 3 is inserted into the mounting hole, and the end face is flush with the side of the end plate 12 facing the inner side of the hole-opening cylinder cutter 1, and a threaded hole is provided to form a threaded connection with the external thread 21 of the center drill 2, and the rod body located outside the end plate 12 is provided with a tool coupler 4;

[0043] The tool coupler 4 includes an inner hole 41 that matches the shape of the main machine drill rod 3. A plurality of mounting bolts 5 are arranged around the inner hole 41 and pass through the tool coupler 4 in the axial direction and are threadedly connected to the end plate 12. The tool coupler 4 is fastened to the end plate 12 by the mounting bolts 5.

[0044] The external thread 21 connecting the center drill 2 and the main drill rod 3 is provided with a hexagonal nut 6 for preventing loosening;

[0045] A limiting clip 7 is disposed on the outer sleeve of the hexagonal nut 6;

[0046] The limiting clip 7 includes a limiting hole 71 matching the shape of the hexagonal nut 6, and a waist-shaped hole 72 outside the limiting hole 71;

[0047] The waist-shaped hole 72 corresponds to the projection position of any mounting bolt 5, the width matches the corresponding mounting bolt 5, and the length is curved with the axis of the corresponding limiting hole 71 as the center. After the corresponding mounting bolt 5 penetrates the tool coupler 4 and the waist-shaped hole 72, the waist-shaped hole 72, the end plate 12 and the tool coupler 4 are fastened by setting the limiting fastening nut 51.

[0048] Alternatively, the waist-shaped hole 72 is provided with a limiting fastening bolt 8 to fasten with the end plate 12 .

[0049] In some embodiments, an end plate 12 perpendicular to the axis is provided at one end of the hole-opening cylinder cutter 1, and a cutter tooth 11 for opening a hole is provided at the other end.

[0050] In some embodiments, the end plate 12 is provided with a mounting hole at a position corresponding to the axis of the hole-opening cylinder cutter 1, and the main machine drill rod 3 is passed through the mounting hole.

[0051] In some embodiments, the outer shape of the tool coupler 4 is stepped, and a flange-shaped structure extending to all sides is provided at one end close to the end plate 12 .

[0052] In some embodiments, the limiting hole 71 is a hexagonal hole or a twelve-pointed plum blossom hole that matches the shape of the hexagonal nut 6.

[0053] In some embodiments, the end plate 12 is provided with a plurality of chip removal holes 14 .

[0054] In practical applications, the limit clip 7 is made of 20# steel, and its subdivided specifications are: 150, 300, 500 three series. The limit fastening bolt 8 matched with the limit clip 7, including the gasket and spring washer, has specifications of: M12*75, M16*95, and is made of 20# steel.

[0055] The limit clip 7 is installed manually by tightening the bolts with a T-shaped socket wrench and installed at the threaded connection of the HT150, HT300, and HT500 center drill and inside the hole cutter. Figures 3 to 5 .

[0056] The principle of the utility model to stabilize the center drill 2 is mainly carried out from two aspects:

[0057] 1. The limiting clip 7 limits the center drill 2;

[0058] 2. The center drill 2 and the hole-opening cylinder cutter 1 form a hard connection.

[0059] The traditional way of connecting the center drill 2 and the main drill rod 3 only by threads is changed, and a limiting clip 7 is installed at the threaded connection of the center drill 2. The hexagonal nut 6 of the external thread 21 of the center drill 2 is fixed and locked through the internal hexagonal hole or twelve-pointed plum blossom hole of the limiting clip 7 that matches the shape of the hexagonal nut 6, and the other end of the limiting clip 7 is connected to the end plate 12 of the hole-opening tube cutter 1.

[0060] The limit clip 7 eliminates the risk of the center drill 2 falling off due to failure of the threaded connection with the main drill rod 3 due to metal fatigue during over-rotation, and ensures that the spindle runout tends to be normal during hole drilling. The other end of the limit clip 7 is connected to the end plate 12 of the hole drilling cutter 1, and the limit clip 7 becomes the medium for hard connection between the center drill 2 and the hole drilling cutter 1. This reliable support can effectively ensure that the hole drilling cutter 1 and the center drill 2 rotate coaxially without falling during the hole drilling operation.

[0061] With Figure 1 and Figure 2 Compared with the existing structure shown, the center drill 2 and the hole opening knife 1 of the utility model can cooperate precisely. The synergistic effect of the two can improve the stability of the entire hole opening system and reduce the risk of accidents during operation. The precise positioning of the center drill 2 and the efficient cutting of the hole opening knife 1 jointly improve the efficiency of the pressure opening process.

[0062] The setting of the limit clip 7 can avoid thread wear, overload risk, stress concentration and failure of the threaded connection, and can provide additional support to ensure the relative position between the center drill and the hole cutting cutter is fixed, prevent displacement due to vibration or pressure fluctuations when cutting the pipeline, increase the stability of the entire hole cutting system, and help extend the service life of the center drill and the hole cutting cutter.

[0063] The setting of the limiting clip 7 helps to achieve accurate matching between the center drill 2 and the hole-opening tube cutter 1, and improves the overall quality and safety of the hole-opening operation. It is low-cost and can be widely used.

[0064] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A pipeline hole-opening device for preventing loosening in a pipeline pressure hole-opening process, comprising a tubular hole-opening cylinder cutter (1) and a center drill (2) arranged at the axial position of the hole-opening cylinder cutter (1); The hole-opening cylinder cutter (1) is provided with a main machine drill rod (3) through a mounting hole on an end plate (12); One end of the main machine drill rod (3) is inserted into the mounting hole, the end face is flush with a side of the end plate (12) facing the inner side of the hole-opening cylinder cutter (1), and a threaded hole is provided to form a threaded connection with the external thread (21) of the center drill (2), and a tool coupler (4) is sleeved on the rod body located outside the end plate (12); The tool coupler (4) comprises an inner hole (41) matching the shape of the main machine drill rod (3), and a plurality of mounting bolts (5) are arranged around the inner hole (41) and pass through the tool coupler (4) in the axial direction and are threadedly connected to the end plate (12), and are fastened to the end plate (12) through the mounting bolts (5); It is characterized in that The external thread (21) connecting the center drill (2) and the main drill rod (3) is provided with a hexagonal nut (6) for preventing loosening; The hexagonal nut (6) is provided with a limiting clip (7) on its outer shell; The limiting clip (7) comprises a limiting hole (71) matching the shape of the hexagonal nut (6), and a waist-shaped hole (72) outside the limiting hole (71); The waist-shaped hole (72) corresponds to the projection position of any of the mounting bolts (5), has a width that matches the corresponding mounting bolt (5), and a length that is curved into an arc with the axis of the corresponding limiting hole (71) as the center of a circle. After the corresponding mounting bolt (5) penetrates the tool coupler (4) and the waist-shaped hole (72), the waist-shaped hole (72), the end plate (12) and the tool coupler (4) are fastened by setting a limiting fastening nut (51). Alternatively, the waist-shaped hole (72) is provided with a limiting fastening bolt (8) for fastening to the end plate (12).

2. The pipeline opening device for preventing loosening in the pipeline pressure opening process according to claim 1, characterized in that: One end of the hole-opening cylinder cutter (1) is provided with the end plate (12) perpendicular to the axis, and the other end is provided with cutter teeth (11) for opening holes.

3. The pipeline opening device for preventing loosening in the pipeline pressure opening process according to claim 1, characterized in that: The end plate (12) is provided with the mounting hole at a position corresponding to the axis of the hole-opening cylinder cutter (1), and the main machine drill rod (3) is passed through the mounting hole.

4. The pipeline opening device for preventing loosening in the pipeline pressure opening process according to claim 1, characterized in that: The outside of the tool coupler (4) is formed in a stepped shape, and a flange-shaped structure extending in all directions is provided at one end close to the end plate (12).

5. The pipeline opening device for preventing loosening in the pipeline pressure opening process according to claim 1, characterized in that: The limiting hole (71) is a hexagonal hole or a twelve-pointed plum blossom hole that matches the shape of the hexagonal nut (6).

6. The pipeline opening device for preventing loosening in the pipeline pressure opening process according to claim 1, characterized in that: The end plate (12) is provided with a plurality of chip removal holes (14).

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