Polishing device
By setting an elastic cantilever between the connecting sleeve and the connecting part, the extrusion force is used to shrink and tighten the continuous tubing, which solves the problem of the continuous tubing being difficult to center, and achieves uniform grinding and efficient sealing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JEREH ENERGY SERVICES
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-19
AI Technical Summary
In the existing technology, there is a gap between the coiled tubing and the fixed sleeve of the grinding tool, which makes it difficult to center the coiled tubing, affecting the grinding effect and efficiency.
By setting an elastic cantilever between the connecting sleeve and the connecting part, the elastic cantilever is contracted inward by the extrusion force, which hugs the continuous oil tube, avoids gaps, improves the centering of the continuous oil tube relative to the cutter head, and achieves uniform grinding.
It improves the uniformity and quality of grinding the inner wall of the coiled tubing, ensures the sealing of the coiled tubing, and enhances grinding efficiency.
Smart Images
Figure CN224373583U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of coiled tubing tooling technology, and in particular to a grinding device. Background Technology
[0002] In the process of oil and gas extraction, coiled tubing is widely used in operations such as fracturing, acidizing, logging, sand flushing, gas lift, and well workover. In order to achieve the sealing of the inner bore, the weld seam on the inner wall of the coiled tubing needs to be cleaned and ground during the connection of the coiled tubing joint and the tool.
[0003] In related technologies, when grinding the inner wall of a coiled tubing using a grinding tool, because the front end of the coiled tubing is not straight, a certain gap needs to be reserved between the inner hole of the fixing sleeve of the grinding tool and the coiled tubing. However, the coiled tubing and the fixing sleeve are only connected by screws, which makes it difficult to center the coiled tubing, affecting the grinding effect and grinding efficiency. Utility Model Content
[0004] This application provides a grinding device that can grip the continuous oil tube tightly to avoid gaps between the continuous oil tube and the connecting sleeve, thereby improving the centering of the continuous oil tube relative to the cutting head, and thus improving the uniformity of grinding the inner wall surface of the continuous oil tube by the cutting head, ensuring grinding quality.
[0005] This application provides a grinding device, including: a cylindrical assembly including a receiving cavity, wherein a connecting portion is provided at one end of the cylindrical assembly;
[0006] A cutting head, the cutting head being movably disposed within the receiving cavity; and
[0007] A connecting sleeve is detachably connected to the connecting part. The connecting sleeve is used to connect a continuous oil tube. An elastic cantilever is provided at one end of the connecting sleeve facing the cutter head.
[0008] When the connecting sleeve is connected to the connecting part, the connecting part exerts a compressive force on the connecting sleeve, causing the elastic cantilever to contract inward and grip the continuous tubing.
[0009] In one possible implementation, the cylindrical assembly includes an outer cylinder, the connecting portion includes a first conical surface disposed on the inner wall surface of the outer cylinder, and the outer side of the connecting sleeve is provided with a second conical surface that slides in cooperation with the first conical surface.
[0010] In one possible implementation, multiple elastic cantilever arms are provided, and the multiple elastic cantilever arms are spaced apart circumferentially along the connecting sleeve.
[0011] In one possible implementation, the cylinder assembly includes an inner cylinder and a lead screw. The inner cylinder is disposed in the receiving cavity and is fixedly connected to the end of the outer cylinder away from the connecting sleeve. The end of the lead screw near the connecting sleeve is detachably connected to the cutter head and is drivenly connected to the inner cylinder so that the lead screw can move along the axial direction of the outer cylinder under the action of an external force.
[0012] In one possible implementation, the inner cylinder is provided with a first step, and the cutter head is provided with a second step that cooperates with the first step.
[0013] In one possible implementation, the cutter head and the lead screw each have a channel that communicates with the receiving cavity.
[0014] In one possible implementation, a handle is provided at the end of the lead screw away from the cutter head.
[0015] In one possible implementation, the end of the lead screw facing the connecting sleeve has a groove, and the end of the cutter head away from the connecting sleeve has a third step that engages with the groove; or...
[0016] A first connecting sleeve is provided at the end of the cutter head away from the connecting sleeve. The cutter head is sleeved on the end of the lead screw facing the connecting sleeve through the first connecting sleeve. The first connecting sleeve is connected to the lead screw by threads; or...
[0017] A second connecting cylinder is provided at the end of the cutter head away from the connecting sleeve. The cutter head is sleeved on the end of the lead screw facing the connecting sleeve through the second connecting cylinder. The second connecting cylinder is provided with a pin and is connected to the lead screw through the pin.
[0018] In one possible implementation, the connecting part includes a first thread disposed on the inner wall surface of the outer cylinder, and the outer side of the connecting sleeve is provided with a second thread that mates with the first thread.
[0019] In one possible implementation, the connecting sleeve is provided with a plurality of set screws along its circumferential direction, and the connecting sleeve is connected to the continuous tubing via the set screws.
[0020] The technical solutions provided in this application have the following advantages compared with the prior art:
[0021] The grinding device provided in this application embodiment involves pushing a continuous tubing into a connecting sleeve, and then pushing the connecting sleeve with the continuous tubing into the receiving cavity until the end face of the continuous tubing is close to the end face of the cutting head. Since the connecting sleeve has an elastic cantilever at the end facing the cutting head, when the connecting sleeve and the cylinder assembly connect, the connecting part exerts a compressive force on the connecting sleeve. Under the action of this compressive force, the elastic cantilever undergoes radial displacement along the radial direction of the cylinder assembly, causing the elastic cantilever to contract inward. This reduces the inner diameter of the connecting sleeve at the end facing the cutting head, thereby tightening the continuous tubing and preventing gaps between the continuous tubing and the connecting sleeve. This improves the centering of the continuous tubing relative to the cutting head, and thus improves the uniformity of grinding the inner wall surface of the continuous tubing when the cutting head moves along the axial direction of the cylinder assembly, ensuring grinding quality. Simultaneously, it ensures smooth grinding, thereby guaranteeing the sealing of the continuous tubing. Attached Figure Description
[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0025] Figure 1 This is a schematic diagram of a grinding device provided in an embodiment of this application;
[0026] Figure 2 for Figure 1 A perspective view of the connecting sleeve of the polishing device is shown;
[0027] Figure 3 for Figure 2 A cross-sectional view of the connecting sleeve is shown;
[0028] Figure 4 A partial structural diagram of the grinding device provided in the embodiments of this application. Figure 1 ;
[0029] Figure 5 A partial structural diagram of the grinding device provided in the embodiments of this application. Figure 2 ;
[0030] Figure 6 A partial structural diagram of the grinding device provided in the embodiments of this application. Figure 3 .
[0031] Explanation of reference numerals in the attached figures:
[0032] Z: Axial direction; X: Radial direction;
[0033] 100. Grinding device;
[0034] 1. Cylinder assembly; 11. Receiving cavity; 12. Connecting part; 121. First conical surface; 122. First thread; 13. Outer cylinder; 14. Inner cylinder; 141. First step; 15. Lead screw; 151. Groove; 152. Channel;
[0035] 2. Cutting head; 21. Second step; 22. Third step; 23. First connecting sleeve; 24. Second connecting sleeve; 241. Pin;
[0036] 3. Connecting sleeve; 31. Flexible cantilever; 32. Second conical surface; 33. Second thread; 34. Set screw;
[0037] 4. Handle;
[0038] 200. Continuous tubing. Detailed Implementation
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0040] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.
[0041] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.
[0042] In related technologies, when grinding the inner wall of a coiled tubing using a grinding tool, because the front end of the coiled tubing is not straight, a certain gap needs to be reserved between the inner hole of the fixing sleeve of the grinding tool and the coiled tubing. However, the coiled tubing and the fixing sleeve are only connected by screws, which makes it difficult to center the coiled tubing, affecting the grinding effect and grinding efficiency.
[0043] To address the problem in existing technologies where the fixing sleeve of the grinding tool is only secured by screws, making it difficult to center the continuous oil tube and affecting the grinding effect and efficiency, this application provides a grinding device. The device generates a compressive force on the connecting sleeve through the connecting part. Under this compressive force, the elastic cantilever contracts inward, thereby clamping the continuous oil tube and preventing gaps between the continuous oil tube and the connecting sleeve. This improves the centering of the continuous oil tube relative to the cutting head, and consequently, when the cutting head moves along the axial direction of the cylinder assembly, it enhances the uniformity of grinding the inner wall surface of the continuous oil tube, ensuring grinding quality.
[0044] like Figure 1 As shown in the figure, this application provides a grinding device 100, including a cylindrical assembly 1, a cutting head 2, and a connecting sleeve 3. The cylindrical assembly 1 includes a receiving cavity 11, and a connecting portion 12 is provided at one end of the cylindrical assembly 1. The cutting head 2 is movably disposed in the receiving cavity 11 and can move relative to the cylindrical assembly 1 along the axial direction of the cylindrical assembly 1. The connecting sleeve 3 is detachably connected to the connecting portion 12 and is used to connect a continuous oil pipe 200. An elastic cantilever 31 is provided at the end of the connecting sleeve 3 facing the cutting head 2. When the connecting sleeve 3 is connected to the connecting portion 12, the connecting portion 12 generates a compressive force on the connecting sleeve 3, so that the elastic cantilever 31 contracts inward and clamps the continuous oil pipe 200.
[0045] For ease of explanation and understanding, the axial direction of the cylinder assembly 1 can be the Z direction shown in the figure, and the radial direction of the cylinder assembly 1 can be the X direction shown in the figure. The cutter head 2 is movably disposed in the receiving cavity 11, and the cutter head 2 can move relative to the cylinder assembly 1 along the axial direction of the cylinder assembly 1. In use, the continuous tubing 200 is pushed into the connecting sleeve 3, and then the connecting sleeve 3 with the continuous tubing 200 installed is pushed into the receiving cavity 11 until the end face of the continuous tubing 200 is close to the end face of the cutter head 2. Since the end of the connecting sleeve 3 facing the cutter head 2 is provided with an elastic cantilever 31, when the connecting part 12 of the connecting sleeve 3 and the cylinder assembly 1 is connected, the connecting part 12 generates a squeezing force on the connecting sleeve 3. Under the action of the squeezing force, the elastic cantilever 31 generates a radial displacement along the radial direction of the cylinder assembly 1, causing the elastic cantilever 31 to contract inward. The inner diameter of the end of the connecting sleeve 3 facing the cutter head 2 is reduced, thereby holding the continuous tubing 200 tightly and avoiding gaps between the continuous tubing 200 and the connecting sleeve 3. This can improve the centering of the continuous tubing 200 relative to the cutter head 2. As a result, when the cutter head 2 moves along the axial direction of the cylinder assembly 1, it can improve the uniformity of the grinding of the inner wall surface of the continuous tubing 200 by the cutter head 2 and ensure the grinding quality. At the same time, it can ensure smooth grinding, thereby ensuring the sealing of the continuous oil pipe 200.
[0046] In some embodiments, such as Figures 1 to 3 As shown, the cylinder assembly 1 includes an outer cylinder 13, and the connecting part 12 includes a first conical surface 121 disposed on the inner wall surface of the outer cylinder 13. The outer side of the connecting sleeve 3 is provided with a second conical surface 32 that slides with the first conical surface 121. The connecting sleeve 3, on which the continuous oil pipe 200 is installed, is pushed into the receiving cavity 11 until the end face of the continuous oil pipe 200 is close to the end face of the cutter head 2. Through the sliding engagement of the first conical surface 121 and the second conical surface 32, the first conical surface 121 of the connecting part 12 generates a compressive force on the second conical surface 32. The radial component of the compressive force in the cylinder assembly 1 causes the elastic cantilever 31 to contract inward, thereby gripping the continuous oil pipe 200 and preventing gaps between the continuous oil pipe 200 and the connecting sleeve 3. This improves the centering of the continuous oil pipe 200 relative to the cutter head 2.
[0047] In some embodiments, such as Figure 3 As shown, multiple elastic cantilever arms 31 are provided, and these multiple elastic cantilever arms 31 are spaced apart along the circumference of the connecting sleeve 3. With this arrangement, all multiple elastic cantilever arms 31 are subjected to the radial component of the compressive force in the cylinder assembly 1. The multiple elastic cantilever arms 31 contract inward, thereby improving the uniformity of the contraction of the connecting sleeve 3, so as to tightly grip the continuous oil pipe 200 and avoid gaps between the continuous oil pipe 200 and the connecting sleeve 3. This can further improve the centering of the continuous oil pipe 200 relative to the cutter head 2.
[0048] In some embodiments, such as Figure 1As shown, the cylinder assembly 1 includes an inner cylinder 14 and a lead screw 15. The inner cylinder 14 is disposed in the receiving cavity 11 and is fixedly connected to the end of the outer cylinder 13 away from the connecting sleeve 3. The end of the lead screw 15 near the connecting sleeve 3 is detachably connected to the cutter head 2 and is drivenly connected to the inner cylinder 14, so that the lead screw 15 can move along the axial direction of the outer cylinder 13 under the action of external force. The lead screw 15 is drivenly connected to the inner cylinder 14. Specifically, the outer side of the lead screw 15 is provided with an external thread, and the inner wall surface of the inner cylinder 14 is provided with an internal thread that mates with the external thread. With this configuration, since the inner cylinder 14 and the outer cylinder 13 are fixedly connected, when the lead screw 15 is rotated, the lead screw 15 can reciprocate along the axial direction of the outer cylinder 13 under the action of transmission. In use, the connecting sleeve 3, which is equipped with the continuous oil pipe 200, is connected to the outer cylinder 13. The lead screw 15 moves along the axial direction of the outer cylinder 13, driving the cutter head 2 to extend into the continuous oil pipe 200, thereby achieving uniform grinding of the inner wall of the continuous oil pipe 200 by the cutter head 2.
[0049] In some embodiments, such as Figure 1 As shown, the connecting part 12 includes a first thread 122 disposed on the inner wall surface of the outer cylinder 13, and a second thread 33 disposed on the outer side of the connecting sleeve 3 that mates with the first thread 122. Through the engagement of the first thread 122 and the second thread 33, the connecting sleeve 3 can be fixedly connected to the connecting part 12 of the outer cylinder 13. The continuous tubing 200 is installed in the connecting sleeve 3, and the connecting sleeve 3 is rotated. As the connecting sleeve 3 is gradually tightened until the end face of the continuous tubing 200 approaches the end face of the cutter head 2, the first conical surface 121 of the connecting part 12 generates a compressive force on the second conical surface 32 through the sliding engagement of the first conical surface 121 and the second conical surface 32. The radial component of the compressive force in the cylinder assembly 1 causes the elastic cantilever 31 to contract inward, thereby gripping the continuous tubing 200 and preventing gaps between the continuous tubing 200 and the connecting sleeve 3. This improves the centering of the continuous tubing 200 relative to the cutter head 2.
[0050] In some embodiments, such as Figure 4 As shown, the inner cylinder 14 is provided with a first step 141, and the cutter head 2 is provided with a second step 21 that cooperates with the first step 141. After grinding, the lead screw 15 is rotated. When the lead screw 15 drives the cutter head 2 to move in the direction close to the inner cylinder 14, the second step 21 abuts against the first step 141 to limit the movement of the cutter head 2.
[0051] Existing internal wall grinding tools cannot be used to grind continuous tubing with cables (e.g., 200mm). Figure 1As shown, in the grinding device 100 provided in this embodiment, the cutter head 2 and the lead screw 15 each have a channel 152, which communicates with the receiving cavity 11 to allow the cable to pass through. In this embodiment, during use, the connecting sleeve 3 is first connected to the connecting part 12 of the outer cylinder 13, then the cable of the continuous oil pipe 200 is threaded into the channel 152 of the cutter head 2 and the lead screw 15, and then the continuous oil pipe 200 is installed in the connecting sleeve 3 until the end face of the continuous oil pipe 200 is close to the end face of the cutter head 2.
[0052] In some embodiments, such as Figure 1 As shown, a handle 4 is provided at the end of the lead screw 15 away from the cutter head 2. The handle 4 can be connected to the end of the lead screw 15 away from the cutter head 2 via a nut. By providing the handle 4, it is convenient for the operator to rotate the lead screw 15, thus improving the ease of operation.
[0053] The detachable connection methods between the lead screw 15 and the cutter head 2 include snap-fit connection, threaded connection, and pin 241 connection. In one example, such as... Figure 4 As shown, the end of the lead screw 15 facing the connecting sleeve 3 has a groove 151, and the end of the cutter head 2 away from the connecting sleeve 3 has a third step 22 that engages with the groove 151. The groove 151 can be a T-slot. Through the engagement of the groove 151 and the third step 22, the cutter head 2 can be fixedly connected to the lead screw 15. In another example, as... Figure 5 As shown, a first connecting sleeve 23 is provided at the end of the cutter head 2 away from the connecting sleeve 3. The cutter head 2 is sleeved on the end of the lead screw 15 facing the connecting sleeve 3 through the first connecting sleeve 23. The first connecting sleeve 23 is connected to the lead screw 15 by threads. In another example, as shown... Figure 6 As shown, a second connecting cylinder 24 is provided at the end of the cutter head 2 away from the connecting sleeve 3. The cutter head 2 is sleeved on the end of the lead screw 15 facing the connecting sleeve 3 through the second connecting cylinder 24. The second connecting cylinder 24 is provided with a pin 241 and is connected to the lead screw 15 through the pin 241.
[0054] In some embodiments, such as Figure 1 As shown, the connecting sleeve 3 is provided with a plurality of set screws 34 along its circumferential direction, and the connecting sleeve 3 is connected to the coiled tubing 200 through the set screws 34. By fitting the coiled tubing 200 into the connecting sleeve 3, the connection sleeve 3 and the coiled tubing 200 can be fixed together by the plurality of set screws 34.
[0055] The working process of the polishing device 100 provided in this application embodiment is as follows:
[0056] Step 1: Rotate the lead screw 15 until the cutter head 2 is fully exposed outside the outer cylinder 13;
[0057] Step 2: Remove the cutter head 2 from the lead screw 15;
[0058] Step 3: Replace with a new cutter head 2 and install it onto the lead screw 15;
[0059] Step 4: Rotate the lead screw 15 to retract the cutter head 2 to the upper end of the outer cylinder 13;
[0060] Step 5: Connect the connecting sleeve 3 to the outer cylinder 13;
[0061] Step 6: Insert the cable of the continuous tubing 200 with cable into the channel of the cutter head 2 and the lead screw 15, and push the continuous tubing 200 into the connecting sleeve 3 until the end face of the continuous tubing 200 is close to the end face of the cutter head 2.
[0062] Step 7: After tightening the connecting sleeve 3, tighten the set screw 34;
[0063] Step 8: Rotate the lead screw 15 using the handle 4. The lead screw 15 drives the cutter head 2 to rotate and move downward, completing the grinding of the weld seam on the inner wall of the continuous oil pipe 200.
[0064] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a specific order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.
[0065] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.
[0066] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A sharpening device characterized by, include: A cylindrical assembly includes a receiving cavity, and a connecting portion is provided at one end of the cylindrical assembly; A cutting head, which is movably disposed in the receiving cavity; as well as A connecting sleeve is detachably connected to the connecting part. The connecting sleeve is used to connect a continuous oil tube. An elastic cantilever is provided at one end of the connecting sleeve facing the cutter head. When the connecting sleeve is connected to the connecting part, the connecting part exerts a compressive force on the connecting sleeve, causing the elastic cantilever to contract inward and grip the continuous tubing.
2. The sharpening device of claim 1, wherein, The cylindrical assembly includes an outer cylinder, the connecting part includes a first conical surface disposed on the inner wall surface of the outer cylinder, and the outer side of the connecting sleeve is provided with a second conical surface that slides in cooperation with the first conical surface.
3. The sharpening device of claim 2, wherein, Multiple elastic cantilever arms are provided, and the multiple elastic cantilever arms are spaced apart along the circumference of the connecting sleeve.
4. The sharpening device of claim 2, wherein, The cylinder assembly includes an inner cylinder and a lead screw. The inner cylinder is disposed in the receiving cavity and is fixedly connected to the end of the outer cylinder away from the connecting sleeve. The end of the lead screw near the connecting sleeve is detachably connected to the cutter head and is drivenly connected to the inner cylinder so that the lead screw can move along the axial direction of the outer cylinder under the action of external force.
5. The sharpening device of claim 4, wherein, The inner cylinder is provided with a first step, and the cutter head is provided with a second step that cooperates with the first step.
6. The sharpening device of claim 4, wherein, The cutter head and the lead screw each have a channel, and the channel is connected to the receiving cavity.
7. The polishing apparatus according to claim 4, characterized in that, A handle is provided at the end of the lead screw away from the cutter head.
8. The sharpening device of claim 4, wherein, The lead screw has a groove at one end facing the connecting sleeve, and the cutter head has a third step at the end away from the connecting sleeve that engages with the groove; or... A first connecting sleeve is provided at the end of the cutter head away from the connecting sleeve. The cutter head is sleeved on the end of the lead screw facing the connecting sleeve through the first connecting sleeve. The first connecting sleeve is connected to the lead screw by threads; or... A second connecting cylinder is provided at the end of the cutter head away from the connecting sleeve. The cutter head is sleeved on the end of the lead screw facing the connecting sleeve through the second connecting cylinder. The second connecting cylinder is provided with a pin and is connected to the lead screw through the pin.
9. The sharpening device of claim 2, wherein, The connecting part includes a first thread disposed on the inner wall surface of the outer cylinder, and the outer side of the connecting sleeve is provided with a second thread that mates with the first thread.
10. The sharpening device of claim 1, wherein, The connecting sleeve is provided with a plurality of set screws along its circumferential direction, and the connecting sleeve is connected to the continuous tubing through the set screws.