A pipe core grabbing device

Abstract

This invention relates to the field of pipeline core extraction technology and provides a pipeline core extraction device, comprising: a core extraction mechanism and a first drive mechanism driven by the core extraction mechanism, the first drive mechanism driving the core extraction mechanism to reciprocate along the axial direction of the pipeline; the core extraction mechanism includes: a pipe body; at least two core extractors, each core extractor being spaced apart and disposed inside the pipe body; and a second drive mechanism, fixedly disposed on the pipe body and driven by each core extractor, the second drive mechanism driving each core extractor to reciprocate simultaneously along the axial direction of the pipe body, so that each core extractor extracts the core sample from the pipeline one by one. This invention enables multi-stroke movement, which significantly reduces the size of the pipeline core extraction device, facilitating installation and making the pipeline core extraction device suitable for any application scenario, including narrow and elongated application areas.

Description

Technical Field

[0001] This invention belongs to the field of pipeline core technology, and particularly relates to a pipeline core grabbing device. Background Technology

[0002] In the field of pipeline core movement, pipeline core grabbing has been widely used in many mechanized production processes and has demonstrated good performance. However, the core grabbing devices currently used in pipelines are generally single-stroke, meaning the grabbing stroke is fixed. When facing some deep core grabbing scenarios, only very long and large core grabbing devices can be deployed to meet the grabbing requirements. However, this method is only suitable for applications with large spaces. In some applications with limited spaces, it is difficult or even impossible to lay such long and large core grabbing devices, resulting in the inability to successfully complete the grabbing task. Summary of the Invention

[0003] This invention provides a pipe core grabbing device, which aims to solve at least one technical problem in the background art.

[0004] This invention is implemented as follows: a pipe core extraction device is used to extract core samples from a pipe. The pipe core extraction device includes:

[0005] A core-grabbing mechanism and a first driving mechanism transmittedly connected to the core-grabbing mechanism, the first driving mechanism being capable of driving the core-grabbing mechanism to reciprocate along the axial direction of the pipeline to adjust the position of the core-grabbing mechanism within the pipeline; wherein, the core-grabbing mechanism includes:

[0006] tube body;

[0007] At least two core grabbers are arranged at intervals inside the tube body;

[0008] The second drive mechanism is fixedly installed on the pipe body and is connected to each of the core grabbers. The second drive mechanism can drive each of the core grabbers to reciprocate along the axial direction of the pipe body at the same time, so that each of the core grabbers can grab the cores out of the pipe one by one.

[0009] Preferably, the core grabber includes a bushing and a plurality of spring claws disposed on the inner wall of the bushing. The spring claws extend obliquely from the inner wall of the bushing toward the center of one end of the bushing, and the second drive mechanism is connected to the bushing in a driving connection.

[0010] Preferably, the second drive mechanism includes a second lead screw, and the outer wall of the bushing is provided with a second threaded sleeve that is drively connected to the second lead screw.

[0011] Preferably, there are two core grabbers, and each of the second drive mechanisms is connected to the two core grabbers via a second lead screw.

[0012] Preferably, the second drive mechanism further includes a second motor and a gear transmission assembly, wherein the second motor is connected to two second lead screws via the gear transmission assembly.

[0013] Preferably, the gear transmission assembly includes a first gear set, a second gear set, and a third gear set. The first gear set is connected to the second motor via a transmission shaft. The first gear set is also connected to both the second gear set and the third gear set via a transmission shaft. The second gear set and the third gear set are respectively connected to two second lead screws.

[0014] Preferably, both the bushing and the tube are semi-enclosed structures, the top of the bushing is provided with a first notch, and the top of the tube is provided with a second notch, with the first notch and the second notch facing each other.

[0015] Preferably, the included angle of the opening of the first notch is smaller than the included angle of the opening of the second notch, and the included angles of the opening of both the first notch and the second notch are less than 90°.

[0016] Preferably, the second drive mechanism is mounted on the outer wall of the tube body via a bracket and is opposite to the second notch.

[0017] Preferably, the first driving mechanism includes a first motor and a first lead screw that is driven by the first motor. The bottom of the tube is provided with a support seat for supporting the core grabbing mechanism and a screw sleeve that is driven by the first lead screw. The first lead screw is rotatably connected to the support seat through a bearing.

[0018] The beneficial effects achieved by this invention are as follows: By setting a first driving mechanism to adjust the position of the core grabbing mechanism inside the pipeline, and by configuring multiple core grabbers and a second driving mechanism to drive each core grabber to reciprocate along the axial direction of the pipeline, the core grabbers can grab the cores from the pipeline one by one through this reciprocating motion, thereby realizing multi-stroke movement. This can significantly reduce the size of the pipeline core grabbing device, making it easier to lay, and thus making the pipeline core grabbing device suitable for any application scenario, including narrow application scenarios. Attached Figure Description

[0019] Figure 1 This is a perspective view of the pipe core grabbing device in Embodiment 1 of the present invention;

[0020] Figure 2 This is a perspective view of the second driving mechanism in Embodiment 1 of the present invention;

[0021] Figure 3 This is a perspective view of the core grabber in Embodiment 1 of the present invention;

[0022] Figure 4 This is a diagram showing the usage status of the pipe core grabbing device in Embodiment 1 of the present invention;

[0023] Figure 5 for Figure 4 The left view in the middle;

[0024] Figure 6 for Figure 5 The cross-sectional view of the BB line.

[0025] Figure 7 This is a conventional core structure diagram provided for an embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] Example 1

[0028] Please see Figures 1-3 The image shows a pipe core extraction device according to Embodiment 1 of the present invention, used to extract core samples from a pipe. For example, it can be used for... Figure 7 The core-grabbing device shown includes a core-grabbing mechanism 10 and a first drive mechanism 20 connected to the core-grabbing mechanism 10. The first drive mechanism 20 drives the core-grabbing mechanism 10 to reciprocate along the axial direction of the pipeline to adjust the position of the core-grabbing mechanism 10 within the pipeline, thereby adjusting the core-grabbing stroke. Specifically, the first drive mechanism 20 includes a first motor 21 and a first lead screw 22 connected to the first motor 21. The bottom of the pipe body 11 is provided with a support seat 111 for supporting the core-grabbing mechanism 10 and a threaded sleeve 112 that drives the first lead screw 22. The first lead screw 22 is rotatably connected to the support seat 111 through a bearing. The first motor 21 drives the first lead screw 22 to rotate, thereby driving the entire core-grabbing mechanism 10 to move along the axial direction of the pipeline.

[0029] In this embodiment, the core-grabbing mechanism 10 includes a pipe body 11, at least two core-grabbing devices 12 disposed within the pipe body 11, and a second drive mechanism 13 fixedly disposed on the pipe body 11 and drivenly connected to each core-grabbing device 12. The core-grabbing devices 12 are spaced apart inside the pipe body 11. The second drive mechanism 13 can drive each core-grabbing device 12 to reciprocate simultaneously along the axial direction of the pipe body 11, thereby further adjusting the core-grabbing stroke and enabling each core-grabbing device 12 to sequentially and sequentially grab the core from the pipe. That is, the first drive mechanism 20 and the second drive mechanism 13 cooperate to achieve multi-stroke movement for core grabbing.

[0030] Specifically, in this embodiment, there are two core grabbers 12, but the invention is not limited to this. In other embodiments, more core grabbers 12 can be set according to actual factors such as pipe length. Furthermore, in order to enable each core grabber 12 to sequentially and relay-style extract the core from the pipe, this embodiment has made a special design for the core grabbers 12 based on the specific structure of the core. Specifically, for example… Figure 3 As shown, the core grabber 12 includes a bushing 121 and several spring claws 122 disposed on the inner wall of the bushing 121. The second drive mechanism 13 is connected to the bushing 121. The spring claws 122 extend obliquely from the inner wall of the bushing 121 towards the center of one end of the bushing 121. During actual grabbing, the core grabber 12, driven by the second drive mechanism 13, continuously penetrates deeper into the pipe (i.e., moves inward). When it encounters a core, the bushing 121 of the foremost core grabber 12 will slip from the front end of the core onto the core and gradually move towards the rear end of the core. At this time, due to the oblique arrangement of the spring claws 122, the core can pass through smoothly. When it moves to the shoulder position on the core (e.g., ... Figure 7 As shown, due to the reduced diameter at the shoulder position, the spring claw 122 resets and locks onto the shoulder position. Then, the second drive mechanism 13 drives the bushing 121 to move outward, continuously extracting the rock core from the pipe. When the foremost rock core extractor 12 moves outward to its limit, the second drive mechanism 13 drives the rock core extractor 12 to move inward again, causing the bushing 121 of the second rock core extractor 12 to lock onto the shoulder position. Then, the second rock core extractor 12's bushing 121 extracts the rock core from the pipe, and so on, thus achieving a relay-style extraction of the rock core from the pipe.

[0031] To reduce the overall size of the core-grabbing mechanism 10 and make it more suitable for confined spaces, this embodiment proposes a small-sized and stable second drive mechanism 13. For details, please refer to... Figure 2The second drive mechanism 13 includes a second motor 131, a gear transmission assembly 132, and two second lead screws 133. The outer wall of the bushing 121 is provided with a second threaded sleeve 1211 that is operatively connected to the second lead screws 133. Each of the second drive mechanisms 13 is connected to one of the two core grabbers 12 via a second lead screw 133. The second motor 131 is operatively connected to both second lead screws 133 via the gear transmission assembly 132. More specifically, the gear transmission assembly 132 includes a first gear set, a second gear set, and a third gear set. The first gear set is operatively connected to the second motor 131. The first gear set is also operatively connected to both the second and third gear sets via a transmission shaft. The second and third gear sets are operatively connected to the two second lead screws 133 respectively. Specifically, the first gear set includes a first driving gear 1321 and a first driven gear 1322 that mesh and drive each other. The first driving gear 1321 is connected to the output shaft of the second motor 131, and the first driven gear 1322 is connected to the middle of the transmission shaft 1323. The second gear set includes a second driving gear 1324 and a second driven gear 1325 that mesh and drive each other. The third gear set includes a third driving gear 1326 and a third driven gear 1327 that mesh and drive each other. The second driving gear 1324 and the third driving gear 1326 are respectively connected to both ends of the transmission shaft 1323, and the second driven gear 1325 and the third driven gear 1327 are respectively connected to two second lead screws 133. That is, in this embodiment, a single motor and a clever gear transmission structure can simultaneously drive two lead screws to rotate, thereby driving two core grabbers 12 to move synchronously. The structure is ingenious, which greatly reduces the volume of the transmission mechanism and is more conducive to reducing the volume of the entire core grabber mechanism 10.

[0032] In a preferred embodiment, both the bushing 121 and the tube 11 are preferably semi-enclosed structures. Specifically, the top of the bushing 121 has a first notch a, and the top of the tube 11 has a second notch b. The first notch a and the second notch b are positioned opposite each other. By providing the first notch a and the second notch b, it is convenient for the bushing 121 to be fitted onto the rock core, and it is also convenient for the operator to observe from the outside whether the bushing 121 is engaged with the rock core shoulder. At the same time, it is also convenient for the second drive mechanism 13 to connect with the internal rock core gripper 12. In the most preferred embodiment, the included angle of the opening of the first notch a is smaller than the included angle of the opening of the second notch b, and the included angles of the opening of the first notch a and the second notch b are both less than 90°. This can well meet the connection requirements of the second drive mechanism 13 and the rock core gripper 12 and the observation requirements of the operator, while also ensuring the contact area between the tube 11 and the rock core, and ensuring the smooth movement of the rock core.

[0033] The second drive mechanism 13 is mounted on the outer wall of the tube 11 via a bracket 134 and is opposite to the second notch b. The drive shaft 1323 is rotatably connected to the bracket 134 via a bearing. The second motor 131 is fixed on the bracket 134. One end of the second lead screw 133 is rotatably connected to the bracket 134 via a bearing, and the other end of the second lead screw 133 is rotatably connected to the outer wall of the end of the tube 11 via a bearing.

[0034] Please see Figures 4-6 In practical use, the second motor 131 rotates in the forward direction, driving the two core grabbers 12 to move in a straight line to the right (towards the inside of the pipe). If the core grabber 12 moves to the rightmost side of the second screw but still has not reached the core position, the first motor 21 can be controlled to rotate in the forward direction, driving the pipe body 11 to move to the right, increasing the length of the core grabber 12 extending to the right, so as to grab the core. When the front core gripper 12 moves to the right side of the core shaft shoulder, the second motor 131 rotates in the reverse direction, driving both core grippers 12 to move to the left (outside the pipe, i.e., back along the original path) in a straight line. At this time, the front core gripper 12 engages the core shaft shoulder and pulls the core into the pipe body 11, until the rear core gripper 12 moves to the far left of the second screw. Then, the second motor 131 rotates in the forward direction, driving both core grippers 12 to move to the right in a straight line, until the rear core gripper 12 moves to the right side of the core shaft shoulder. Then, the second motor 131 rotates in the reverse direction, driving both core grippers 12 to move to the left in a straight line. The rear core gripper 12 engages the core shaft shoulder and pulls the core to the left side of the pipe body 11, until the rear core gripper 12... 2. Move to the leftmost side of the second lead screw, then the second motor 131 rotates in the forward direction, driving the two core grippers 12 to move to the right again in a straight line until the front core gripper 12 moves to the right side of the core tail (if the core gripper 122 moves to the rightmost side of the second lead screw but has not yet reached the core tail, the first motor 21 can be rotated in the forward direction to drive the tube body 11 to move to the right, increasing the stroke of the core gripper 12). Then the second motor 131 rotates in the reverse direction, driving the two core grippers 12 to move to the left again in a straight line. At this time, the front core gripper 12 will push the core tail until the core is pushed out of the pipe. At the same time, the first motor 21 can also be controlled to rotate in the reverse direction to drive the tube body 11 to move to the left at the same time, so as to realize the movement of the core in the pipe by using multiple strokes.

[0035] In summary, the pipeline core grabbing device in this embodiment has the following beneficial effects: by setting a first drive mechanism 20 to adjust the position of the core grabbing mechanism 10 in the pipeline, and by configuring multiple core grabbers 12 and a second drive mechanism 13 to drive each core grabber 12 to reciprocate along the axial direction of the pipeline, the core grabbers 12 can grab the cores from the pipeline one by one through this reciprocating motion, thereby realizing multi-stroke movement. This can significantly reduce the size of the pipeline core grabbing device, making it easier to lay, and thus making the pipeline core grabbing device applicable to any application scenario, including narrow application scenarios.

[0036] It should be noted that the embodiments of the present invention are based on Figure 7 The description uses a rock core as an example, but this does not limit the pipe core grabbing device in the embodiments of the present invention to only be applicable to Figure 7 This illustrates a core structure. Clearly, the pipe core grabbing device in this embodiment of the invention can be adapted to any core structure with a shoulder section (currently, most cores have a shoulder section) or other similar variable diameter sections.

[0037] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe core extraction device for extracting rock cores from a pipe, characterized in that, The pipeline core grabbing device includes: A core-grabbing mechanism and a first driving mechanism transmittedly connected to the core-grabbing mechanism, the first driving mechanism being capable of driving the core-grabbing mechanism to reciprocate along the axial direction of the pipeline to adjust the position of the core-grabbing mechanism within the pipeline; wherein, the core-grabbing mechanism includes: tube body; At least two core grabbers are arranged at intervals inside the tube body; The second drive mechanism is fixedly installed on the pipe body and is connected to each of the core grabbers in a transmission manner. The second drive mechanism can drive each of the core grabbers to reciprocate along the axial direction of the pipe body at the same time, so that each of the core grabbers can grab the core from the pipe one by one in a relay manner. The core grabber includes a bushing and several spring claws disposed on the inner wall of the bushing. The spring claws extend obliquely from the inner wall of the bushing toward the center of one end of the bushing. The second drive mechanism is connected to the bushing in a driving connection. The bushing engages with the shoulder of the core.

2. The pipe core grabbing device according to claim 1, characterized in that, The second drive mechanism includes a second lead screw, and the outer wall of the bushing is provided with a second threaded sleeve that is drively connected to the second lead screw.

3. The pipe core extraction device according to claim 2, characterized in that, The number of core grabbers is two, and each of the second drive mechanisms is connected to the two core grabbers through a second lead screw.

4. The pipeline core extraction device according to claim 3, characterized in that, The second drive mechanism also includes a second motor and a gear transmission assembly, wherein the second motor is connected to two second lead screws via the gear transmission assembly.

5. The pipe core grabbing device according to claim 4, characterized in that, The gear transmission assembly includes a first gear set, a second gear set, and a third gear set. The first gear set is connected to the second motor via a transmission shaft. The first gear set is also connected to both the second gear set and the third gear set via a transmission shaft. The second gear set and the third gear set are respectively connected to two second lead screws.

6. The pipeline core extraction device according to claim 1, characterized in that, Both the bushing and the tube are semi-enclosed structures. The top of the bushing is provided with a first notch, and the top of the tube is provided with a second notch. The first notch and the second notch are positioned opposite each other.

7. The pipe core grabbing device according to claim 6, characterized in that, The included angle of the opening of the first notch is smaller than the included angle of the opening of the second notch, and the included angles of the opening of both the first notch and the second notch are less than 90°.

8. The pipeline core extraction device according to claim 6, characterized in that, The second drive mechanism is mounted on the outer wall of the tube via a bracket and is opposite to the second notch.

9. The pipeline core extraction device according to claim 1, characterized in that, The first driving mechanism includes a first motor and a first lead screw that is driven by the first motor. The bottom of the tube is provided with a support seat for supporting the core grabbing mechanism and a screw sleeve that is driven by the first lead screw. The first lead screw is rotatably connected to the support seat through a bearing.

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