Portable pipeline online trepanning device

Abstract

The utility model discloses a portable pipeline online trepanning device. The device comprises a drill rod main shaft, a screw-in box, a manual drilling assembly, a guide short pipe, an interface short pipe, an interface ball valve and a pipe joint, wherein a hole drill is fixed at the front end of the drill rod main shaft; the screw-in box, the manual drilling assembly, the guide short pipe, the connector short pipe and the connector ball valve are sequentially connected and arranged on the outer side of the drill rod main shaft in a sleeving mode. A locking disc fixedly connected with a port of the screw-in box is arranged at the inlet end of the screw-in box, an inner threaded hole is formed in the center of the locking disc, and outer threads matched with the inner threaded hole are arranged on the drill rod spindle. The interior of the manual drilling assembly is matched with a spline of the drill rod main shaft, the drill rod main shaft is driven to rotate under the action of the hand rocker, the drill rod main shaft can move up and down under the threaded fit of the drill rod main shaft and the locking disc, and then the hole drill is driven to achieve the hole opening action. The device is simple in structure, small in size, convenient to carry, time-saving and labor-saving; and the operation can be completed manually without arranging cables, so that the use is convenient and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the field of pipeline pressure opening equipment, in particular to a portable pipeline online opening device. Background Art

[0002] Pipeline pressure tapping technology is a safe, environmentally friendly, economical and efficient emergency repair technology for in-service pipelines. It is suitable for normal maintenance and renovation of various media pipelines such as water, gas, and natural gas, as well as emergency repairs in the event of an accident, such as emergency repair under pressure, replacement of corroded pipe sections, installation of additional equipment, and distribution and transformation operations.

[0003] Existing pipe opening devices, such as prior art CN 110125450 A, titled "A Pressure Pipeline Under Pressure Opening Device," disclose a pipe opening device comprising a drive unit, a top base, a servo unit, a connecting tube, a header, a base, and a spindle unit. Prior art CN 220761080 U, titled "A Pressure Pipeline Under Pressure Opening Device," discloses a pipe opening device comprising a body assembly, a cutting assembly, a power assembly, and a feed assembly.

[0004] The above-mentioned prior art still has the following disadvantages when used in practice: (1) It is too large in size and requires multiple people to carry and operate, which is time-consuming and labor-intensive; (2) It uses a power supply and requires cables to be laid in advance during construction, which is cumbersome to operate; (3) Too much iron filings generated during operation will remain inside the pipe, thereby affecting work efficiency.

[0005] As can be seen, the existing online pipe opening devices mentioned above still have inconveniences and defects in their structure, method, and use, and are in urgent need of further improvement. Creating a new portable online pipe opening device that can at least address one of the drawbacks of the existing technology has become a highly sought-after goal in the industry. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a portable online pipeline hole opening device, which has a small size, a simple structure, does not require the arrangement of cables, is easy to use, and can also prevent iron filings from being left in the pipeline when the hole is opened, thereby overcoming the shortcomings of the existing online pipeline hole opening device.

[0007] In order to solve the above technical problems, the utility model provides a portable online pipeline drilling device, including a drill rod spindle, a screw-in box, a manual drilling assembly, a guide short pipe, an interface short pipe, an interface ball valve and a pipe joint.

[0008] The front end of the drill rod main shaft is used to fix the hole drill;

[0009] The screw-in box, manual drilling assembly, guide short pipe, interface short pipe and interface ball valve are connected in sequence, and a center hole is provided inside each of them. One end of the pipe joint is used to be welded around the opening of the pipe to be drilled, and the other end is used to be sealed with the interface ball valve. The drill rod main shaft extends from the inlet end of the screw-in box until the hole drill at its front end contacts the outer wall of the pipe to be drilled.

[0010] The inlet end of the screw-in box is provided with a locking disk fixedly connected to its port, the center of the locking disk is provided with an internal threaded hole, and the drill rod main shaft is provided with an external thread matching the thread of the internal threaded hole;

[0011] The manual drilling assembly includes a housing and a hand crank, a worm gear assembly is provided inside the housing, the worm of the worm gear assembly is connected to the hand crank and is driven to rotate thereby, a toothed hole is provided inside the worm wheel of the worm gear assembly, and a spline matching the toothed hole is provided on the drill rod main shaft, so that the hand crank drives the worm to rotate, and the worm drives the drill rod main shaft to rotate by engaging with the worm gear. The drill rod main shaft can also move up and down by cooperating with the thread of the locking disk, thereby driving the hole drill to realize the online drilling action of the pipe to be drilled.

[0012] Further improvement, the drill rod main shaft includes a drill rod spline shaft and a screw-in push rod, the spline on the drill rod main shaft is arranged on the drill rod spline shaft, the external thread on the drill rod main shaft is arranged on the screw-in push rod, the front end of the screw-in push rod is fixedly connected to the rear end of the drill rod spline shaft, and the front end of the drill rod spline shaft is fixedly connected to the hole drill.

[0013] According to a further improvement, the rear end of the drill pipe spline shaft is configured as a flared countersunk structure, and a countersunk end cover is provided, the countersunk end cover is sleeved on the screw-in push rod, and the front end of the screw-in push rod is configured as a tapered step structure, the outer periphery of the thin diameter section of the step structure is fixed with a thrust bearing retaining ring through a pin shaft, and the outer periphery of the thick diameter section of the step structure is fixed with a thrust bearing, the thrust bearing and the thrust bearing retaining ring are axially abutted, after the front end of the screw-in push rod equipped with the thrust bearing and the thrust bearing retaining ring is inserted into the countersunk structure of the drill pipe spline shaft, the countersunk end cover is fixedly connected to the rear end of the drill pipe spline shaft, thereby realizing a fixed connection between the drill pipe spline shaft and the screw-in push rod.

[0014] As a further improvement, the screw-in box adopts a tubular structure with flanges at both ends, the flared countersunk structure at the rear end of the drill rod spline shaft moves up and down along the tubular structure, the rear end flange of the tubular structure is connected to the locking plate by bolts, and the front end flange is connected to the shell of the manual drilling assembly by bolts.

[0015] Further improvement, the rear end of the guide short pipe is provided with a rear flange plate fixedly connected with the shell of the manual drilling assembly, the outer side of the front end of the guide short pipe is provided with an external thread segment threadedly connected with the rear end of the interface short pipe, and the inner side of the front end of the guide short pipe is provided with a guide hole for the up-down sliding of the drill rod spline shaft.

[0016] Further improvement, the interface short pipe adopts a 1.5-inch interface short pipe or a 2-inch interface short pipe, which is used for corresponding interface ball valves of different sizes.

[0017] Further improvement, the central axis of the tubular structure of the screwing box, the central axis of the worm gear of the worm gear assembly, the central axis of the guide hole of the guide short pipe, the central axis of the interface short pipe and the central axis of the pipe joint all coincide with the central axis of the drill rod main shaft.

[0018] Further improvement, the front end of the drill rod spline shaft is provided as a socket hole structure for the insertion of a drill bit stud at the rear end of the hole drill.

[0019] Further improvement, the hole drill adopts an MCTR superhard alloy hole drill, and the hole drill is provided with a cutting tooth at the open end, and the edge of the cutting tooth is serrated.

[0020] Further improvement, the rear end of the screwing jacking rod is provided with a radial through hole, and the radial through hole is used for mounting a jacking rod wrench.

[0021] After adopting the design, the portable pipeline online hole drilling device has at least the following advantages:

[0022] 1. The portable pipeline online hole drilling device is combined with the drill rod main shaft, the screwing box and the manual hole drilling assembly, utilizes the principles of the screw thread and the worm gear mechanism, realizes the forward rotation of the drill rod main shaft, achieves the purpose of hole drilling, has the advantages of simple structure, small size, convenience in carrying, time and labor saving, completion by hand, no need of arranging cables, convenience in use, adaptability to different hole drilling environments, guarantee of work efficiency and wide application range.

[0023] 2. The guide hole in the guide short pipe is further provided, so that the central axis of the drill rod main shaft can be kept unchanged or only have a slight change, and the stability of the hole drilling device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, the utility model will be further described in detail in combination with the drawings and the specific embodiments.

[0025] Figure 1 It is a whole structure schematic view of the portable pipeline online hole drilling device of the utility model;

[0026] Figure 2 This is an exploded view of the structure of the portable online pipeline opening device of the utility model;

[0027] Figure 3 This is a structural cross-sectional view of the portable online pipeline opening device of the utility model;

[0028] Figure 4 This is a partial structural cross-sectional view of the drill pipe spline shaft-screw-in push rod assembly in the portable pipeline online hole opening device of the utility model.

[0029] Figure 5 This is a longitudinal cross-sectional view of the reducer structure in the portable online pipeline opening device of the utility model;

[0030] Figure 6 This is a transverse cross-sectional view of the reducer structure in the portable online pipeline opening device of the utility model. DETAILED DESCRIPTION

[0031] The following describes exemplary embodiments of the present invention in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0032] It should be noted that, in the description of this application, the term "front end" refers to the end of the opening device close to the pipe opening, and the "rear end" refers to the end opposite to the "front end". This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0033] Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0034] Refer to the attached Figures 1 to 3 As shown, the pipeline online drilling device of this embodiment includes a drill rod main shaft 1, a screw-in box 2, a manual drilling assembly 3, a guide short pipe 4, an interface short pipe 5, an interface ball valve 6 and a pipe joint 7.

[0035] The front end of the drill rod main shaft 1 is used to fix the hole drill 8. Figure 4As shown, the drill rod spindle 1 comprises a drill rod spline shaft 11 and a screwing jack 12. The front end of the screwing jack 12 is fixedly connected with the rear end of the drill rod spline shaft 11, and the front end of the drill rod spline shaft 11 is fixedly connected with the hole drill 8.

[0036] In this embodiment, the screwing jack 12 is connected with the drill rod spline shaft 11 in the following way: as shown in Figure 4 As shown, the rear end of the drill rod spline shaft 11 is provided with a flared counterbore structure 111, and a counterbore end cover 112 is arranged. The counterbore end cover 112 is sleeved on the screwing jack 12. The front end of the screwing jack 12 is provided with a tapered step structure 121. The outer periphery of the thin diameter section of the step structure 121 is fixedly connected with a thrust bearing retainer 123 through a pin shaft 122. The outer periphery of the thick diameter section of the step structure 121 is fixedly connected with a thrust bearing 124, which axially abuts against the thrust bearing retainer 123. When connected, after the front end of the screwing jack 12, on which the thrust bearing 124 and the thrust bearing retainer 123 are arranged, is inserted into the counterbore structure 111 of the drill rod spline shaft 11, the counterbore end cover 112 is fixedly connected with the rear end of the drill rod spline shaft 11 through a bolt 114, thereby realizing the fixed connection of the drill rod spline shaft 11 and the screwing jack 12 and ensuring the integrity of the drill rod spindle 1. The thrust bearing 124 can bear the axial thrust of the screwing jack 12 during rotation.

[0037] The rear end of the screwing jack 12 is provided with a radial through hole 125, in which a jack wrench 126 is arranged and fastened through a connecting piece 128.

[0038] In this embodiment, the screwing box 2, the manual drilling assembly 3, the guide short pipe 4, the interface short pipe 5 and the interface ball valve 6 are sequentially connected, and each of them is provided with a central hole. One end of the pipe joint 7 is used for being welded in advance around the hole of the pipeline to be drilled, and the other end is used for being sealingly connected with the front end of the interface ball valve 6. In this way, the drill rod spindle 1 extends into the inlet end of the screwing box 2 until the hole drill 8 at the front end of the drill rod spindle 1 contacts the outer wall of the pipeline to be drilled. The drill rod spindle 1 can rotate relative to the screwing box 2, the manual drilling assembly 3, the guide short pipe 4, the interface short pipe 5 and the interface ball valve 6, and can move up and down, thereby facilitating the drilling operation.

[0039] Specifically, the inlet end of the screwing box 2 is provided with a locking disc 21 fixedly connected with the port thereof. The center of the locking disc 21 is provided with an internal thread hole 211. The screwing jack 12 is provided with an external thread 127 threadedly matched with the internal thread hole 211.

[0040] Referring again to the drawings Figure 3 , 5As shown in Figs. 6, the manual drilling assembly 3 in this embodiment includes a housing 31 and a hand lever 32, and the inside of the housing 31 is provided with a worm gear assembly. The worm 33 of the worm gear assembly is connected with the hand lever 32 and is driven to rotate by the hand lever 32. The worm gear 34 of the worm gear assembly is internally provided with a toothed hole 341, and the drill rod spline shaft 11 is provided with a spline 113 matched with the toothed hole 341. Then the hand lever 32 drives the worm 33 to rotate, the worm 33 drives the drill rod spline shaft 11 to rotate through the meshing with the worm gear 34, and the drill rod spline shaft 11 further moves up and down through the fixed connection with the screwing jacking rod 12 and the screwing of the screwing jacking rod 12 with the locking disc 21, thereby driving the hole drill 8 to realize the on-line drilling of the pipeline to be drilled.

[0041] More specifically, the screwing box 2 adopts a tubular structure with flange plates at both ends, the flared counterbore structure 111 at the rear end of the drill rod spline shaft 11 moves up and down along the tubular structure and can ensure the stability of the axis of the drill rod spline shaft 11. The rear end flange plate of the tubular structure is connected with the locking disc 21 through bolts, and the front end flange plate is connected with the housing 31 of the manual drilling assembly 3 through bolts.

[0042] The rear end of the guide short pipe 4 is provided with a rear flange plate 41 fixedly connected with the housing 31 of the manual drilling assembly 3, the outer side of the front end of the guide short pipe 4 is provided with an outer thread section 42 screwedly connected with the rear end of the interface short pipe 5, and the inner side of the front end of the guide short pipe 4 is provided with a guide hole 43 for the drill rod spline shaft 11 to slide up and down.

[0043] The interface short pipe 5 can adopt a 1.5-inch interface short pipe, or a 2-inch or other size interface short pipe, which is used for corresponding different sizes of interface ball valves 6. The interface ball valve 6 is selected according to the pressure of the pipeline to be drilled, so as to adapt to different pressure pipelines to be drilled.

[0044] In order to ensure the stability of the rotation of the drill rod main shaft 1, the central axis of the tubular structure of the screwing box 2, the central axis of the worm gear 34 of the worm gear assembly, the central axis of the guide hole 43 of the guide short pipe 4, the central axis of the interface short pipe 5, and the central axis of the pipe joint 7 all coincide with the central axis of the drill rod main shaft 1, which can ensure that the axis of the drill rod main shaft 1 remains unchanged or only has a slight change, thereby improving the stability of the drilling device. The pipeline drilling device has the advantages of simple structure, manual operation, small size, light weight, easy to carry, time saving, labor saving, or high working efficiency compared with the existing drilling devices.

[0045] In this embodiment, the front end of the drill rod spline shaft 11 is configured as a socket structure for inserting the drill bit stud 81 at the rear end of the hole drill 8, such as a triangular prism structure socket 115, which facilitates the detachable connection of the hole drill 8 and the replacement of the drill bit, which is beneficial to improving the cutting speed and efficiency; it can also ensure that the drill bit stud is concentric with the drill rod main shaft 1, thereby ensuring the stability of the hole opening operation.

[0046] In this embodiment, the drill 8 is a MCTR super-hard alloy drill. Its open end is equipped with cutting teeth with serrated edges, which improve cutting speed and efficiency. The MCTR super-hard alloy drill 8 has a hollow interior, which holds the cut pipe wall within the hollow space. This prevents the cut pipe wall from falling out under the influence of gravity during the operation, ensuring efficient and safe cutting.

[0047] The specific use method of the portable online pipeline opening device of the utility model is as follows:

[0048] First, weld one end of the pipe joint 7 in advance around the opening of the pipe to be drilled; connect the screw-in box 2, manual drilling assembly 3, guide short tube 4, interface short tube 5 and interface ball valve 6 in sequence, and then insert the screw-in push rod 12 and the drill pipe spline shaft 11 into the hollow through hole formed by the screw-in box 2, manual drilling assembly 3, guide short tube 4, interface short tube 5 and interface ball valve 6, and insert the shaft head stud 81 of the appropriate hole drill 8 into the front end receiving hole 115 of the drilling spindle 1, and then seal the interface ball valve 6 and the pipe joint 7 to complete the drilling preparation;

[0049] Then, the locking disk 21 is fixedly connected to the rear end of the screw-in box 2, and by rotating the push rod wrench 126, the drill rod spindle 1 moves forward so that the open end of the hole drill 8 contacts the position to be drilled;

[0050] Next, the hand crank 32 is rotated to make the drill rod main shaft 1 drive the drill 8 to rotate and move forward, thereby completing the drilling operation of the pipeline.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art can make some simple modifications, equivalent changes or modifications based on the technical content disclosed above, which fall within the scope of protection of the present invention.

Claims

1. A portable online pipeline drilling device, characterized in that: Including drill pipe spindle, screw box, manual drilling assembly, guide short pipe, interface short pipe, interface ball valve and pipe joint, The front end of the drill rod main shaft is used to fix the hole drill; The screw-in box, manual drilling assembly, guide short pipe, interface short pipe and interface ball valve are connected in sequence, and a center hole is provided inside each of them. One end of the pipe joint is used to be welded around the opening of the pipe to be drilled, and the other end is used to be sealed with the interface ball valve. The drill rod main shaft extends from the inlet end of the screw-in box until the hole drill at its front end contacts the outer wall of the pipe to be drilled. The inlet end of the screw-in box is provided with a locking disk fixedly connected to its port, the center of the locking disk is provided with an internal threaded hole, and the drill rod main shaft is provided with an external thread matching the thread of the internal threaded hole; The manual drilling assembly includes a housing and a hand crank, a worm gear assembly is provided inside the housing, the worm of the worm gear assembly is connected to the hand crank and is driven to rotate thereby, a toothed hole is provided inside the worm wheel of the worm gear assembly, and a spline matching the toothed hole is provided on the drill rod main shaft, so that the hand crank drives the worm to rotate, and the worm drives the drill rod main shaft to rotate by engaging with the worm gear. The drill rod main shaft can also move up and down by cooperating with the thread of the locking disk, thereby driving the hole drill to realize the online drilling action of the pipe to be drilled.

2. The portable online pipeline drilling device according to claim 1, characterized in that: The drill rod main shaft includes a drill rod spline shaft and a screw-in push rod. The spline on the drill rod main shaft is arranged on the drill rod spline shaft, and the external thread on the drill rod main shaft is arranged on the screw-in push rod. The front end of the screw-in push rod is fixedly connected to the rear end of the drill rod spline shaft, and the front end of the drill rod spline shaft is fixedly connected to the hole drill.

3. The portable online pipeline drilling device according to claim 2, characterized in that: The rear end of the drill pipe spline shaft is configured as a flared countersunk structure, and a countersunk end cover is provided, the countersunk end cover is sleeved on the screw-in push rod, the front end of the screw-in push rod is configured as a tapered step structure, the outer periphery of the thin-diameter section of the step structure is fixed with a thrust bearing retaining ring through a pin shaft, and the outer periphery of the thick-diameter section of the step structure is fixed with a thrust bearing, the thrust bearing and the thrust bearing retaining ring are axially abutted against each other, after the front end of the screw-in push rod equipped with the thrust bearing and the thrust bearing retaining ring is inserted into the countersunk structure of the drill pipe spline shaft, the countersunk end cover is fixedly connected to the rear end of the drill pipe spline shaft, thereby realizing a fixed connection between the drill pipe spline shaft and the screw-in push rod.

4. The portable online pipeline drilling device according to claim 3, characterized in that: The screw-in box adopts a tubular structure with flanges at both ends. The flared countersunk structure at the rear end of the drill rod spline shaft moves up and down along the tubular structure. The rear end flange of the tubular structure is connected to the locking plate by bolts, and the front end flange is connected to the shell of the manual drilling assembly by bolts.

5. The portable online pipeline drilling device according to claim 4, characterized in that: The rear end of the guide short tube is provided with a rear flange fixedly connected to the shell of the manual drilling assembly, the outer side of the front end of the guide short tube is provided with an external threaded section threadedly connected to the rear end of the interface short tube, and the inner side of the front end of the guide short tube is provided with a guide hole for the drill rod spline shaft to slide up and down.

6. The portable online pipeline drilling device according to claim 5, characterized in that: The interface short pipe adopts a 1.5-inch interface short pipe or a 2-inch interface short pipe, which is used to correspond to interface ball valves of different sizes.

7. The portable online pipeline drilling device according to claim 6, characterized in that: The central axis of the tubular structure of the screw-in box, the central axis of the worm wheel of the worm gear assembly, the central axis of the guide hole of the guide short tube, the central axis of the interface short tube and the central axis of the pipe joint all coincide with the central axis of the drill rod main shaft.

8. The portable online pipeline drilling device according to claim 2, characterized in that: The front end of the drill rod spline shaft is configured as a socket structure for inserting a drill stud at the rear end of the hole drill.

9. The portable online pipeline drilling device according to claim 8, characterized in that: The hole drill adopts an MCTR super-hard alloy hole drill, and the opening end of the hole drill is provided with cutting teeth, and the edges of the cutting teeth are serrated.

10. The portable online pipeline drilling device according to claim 1, characterized in that: A radial through hole is provided at the rear end of the screw-in ejector rod, and a ejector rod wrench is installed in the radial through hole.

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