Anti-collision device for threaded pipe

Abstract

The utility model provides a threaded pipe anti-collision device. The threaded pipe anti-collision device comprises a pipe opening plug, a screwing rod and a locking piece. The pipe orifice plug comprises an insertion section and a protection section, and the protection section is provided with a containing hole with internal threads on the inner wall; the screwing rod is arranged in the accommodating hole and is provided with a guide strip with an external thread; a smooth groove is formed in the internal thread, and when the guide strip is aligned to the smooth groove, the screwing rod can slide in the axis direction of the containing hole; a locking piece is arranged on the outer side wall of the insertion section in a sliding mode, the bottom end of the locking piece makes contact with an abutting head at one end of the screwing rod, and the abutting head can eject the locking piece out. According to the threaded pipe anti-collision device, the external thread of the guide strip is matched with the internal thread of the containing hole, so that the abutting head can eject the locking piece out when the screwing rod is screwed in the containing hole, and the locking piece abuts against the inner wall of the threaded pipe to lock the pipe opening plug; when the guide strip is aligned with the smooth groove in the internal thread, the screwing rod can slide in the containing hole, and the screwing rod can be rapidly taken out of the containing hole.

Description

Technical Field

[0001] This utility model belongs to the field of threaded pipe protection technology, and in particular relates to a threaded pipe anti-collision device. Background Technology

[0002] Threaded pipes are pipes with threaded structures on their walls. The threaded structure of threaded pipes allows them to bend while maintaining rigidity. It can also increase the contact area with the fluid inside the pipe or the medium outside the pipe, making them widely used in pipeline transportation.

[0003] During transportation or handling, threaded pipes are prone to collisions between their ends and surrounding objects, leading to deformation and affecting installation and use. Repairing this deformation requires additional work and is highly dependent on the pipe's material. While inserting protective plugs to the ends can prevent collisions, traditional plugs rely solely on friction to stay in place, making them susceptible to detachment due to vibrations during transport, thus compromising protection. Utility Model Content

[0004] In view of this, the present invention aims to provide a threaded pipe anti-collision device to securely fix the threaded pipe to the end of the threaded pipe for protection.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A threaded pipe anti-collision device includes: a pipe end plug, a tightening rod, and a locking element; the pipe end plug includes an insertion section and a protective section, wherein the outer diameter of the protective section is larger than the outer diameter of the insertion section; a receiving hole is provided on the end face of the protective section away from the insertion section, and an internal thread is provided on the inner wall of the receiving hole; the tightening rod is detachably disposed in the receiving hole, and a stop head is provided at one end of the tightening rod; a guide strip is provided on the outer wall of the tightening rod, with both ends of the guide strip extending to both ends of the tightening rod, and the guide strip having an outer thread that can mate with the internal thread. The internal thread is also provided with a smooth groove for avoiding the guide bar, and the two ends of the smooth groove extend to the bottom surface and opening of the receiving hole, respectively; when the guide bar is aligned with the smooth groove, the tightening rod can slide along the axial direction of the receiving hole; a locking hole communicating with the receiving hole is provided on the outer wall of the insertion section, and the locking member is slidably disposed inside the locking hole; the bottom end of the locking member extends into the receiving hole along the locking hole and contacts the abutment head, and the abutment head can push the locking member out of the locking hole by moving in the direction of the locking hole.

[0007] Furthermore, the sidewall of the protective section is provided with multiple positioning protrusions and multiple positioning recesses, with the positioning protrusions and positioning recesses alternately and evenly arranged on the sidewall of the protective section.

[0008] Further, the abutting head is a circular truncated cone, and the large end of the circular truncated cone abutting head is connected with the screwing rod.

[0009] Further, the locking member comprises a connecting rod and a locking strip, the bottom end of the connecting rod extends into the accommodating hole along the bottom end of the locking hole and contacts with the abutting head, the locking strip is arranged at the top end of the connecting rod and is perpendicular to the connecting rod, and the length of the locking strip is greater than the outer diameter of the connecting rod.

[0010] Further, the bottom end of the connecting rod is provided with a slope matched with the abutting head.

[0011] Further, a groove for accommodating the locking strip is further arranged on the side wall of the inserting section, and the groove is communicated with the accommodating hole through the locking hole.

[0012] Further, the locking strip is an arc-shaped strip, and the arc center of the locking strip faces the connecting rod.

[0013] Further, the other end of the screwing rod is provided with a cover plate, and a handle is arranged on the end face of the cover plate away from the screwing rod.

[0014] Further, the end face of the protecting section away from the inserting section is provided with a first mark opposite to the smooth groove, and the end face of the cover plate away from the inserting section is provided with a second mark opposite to the guiding strip.

[0015] Compared with the prior art, the threaded pipe anti-collision device has the following advantages:

[0016] (1) The threaded pipe anti-collision device has the following advantages: the guiding strip with external threads on the screwing rod is matched with the internal threads on the inner wall of the accommodating hole, so that when the screwing rod rotates in the accommodating hole, the abutting head at one end of the screwing rod can be driven to move, and the locking member is pushed out when the abutting head moves to the direction of the locking hole, so that the locking member is abutted on the inner wall of the threaded pipe, the screwing rod is gradually screwed in the accommodating hole, the locking member is gradually abutted on the inner wall of the threaded pipe, the pipe plug is firmly locked at the end of the threaded pipe, and the pipe plug is prevented from falling off due to vibration during transportation; the smooth groove on the internal threads can make the guiding strip no longer matched with the internal threads when the guiding strip is aligned with the smooth groove, so that the screwing rod can slide in the accommodating hole, and the operator can quickly take out the screwing rod from the accommodating hole in a sliding manner, so that the state of the locking member abutting against the inner wall of the threaded pipe is released, and the pipe plug can be quickly taken off from the end of the threaded pipe.

[0017] (2) The threaded pipe anti-collision device, positioning protrusions and positioning recesses arranged alternately and uniformly are arranged on the protection section, the positioning protrusions can be inserted into the positioning recesses when a plurality of threaded pipes are stacked and placed, the plurality of threaded pipes are fixed to each other, and displacement between the plurality of threaded pipes cannot occur in transit, so that collision and friction between the threaded pipes are avoided.

[0018] (3) The threaded pipe anti-collision device, the arc-shaped strip perpendicular to the connecting rod is arranged on the connecting rod, the connecting rod can be prevented from falling into the containing hole after the abutting head moves away from the locking hole, the connecting rod always has the function of lifting the locking strip when the abutting head moves close to the locking hole, the slope at the bottom end of the connecting rod cooperates with the side wall of the circular truncated cone abutting head, the connecting rod can be smoothly moved and kept stable, the groove on the insertion section can contain the arc-shaped strip, and the arc-shaped strip is prevented from interfering with the removal of the pipe opening plug, and the arc-shaped strip can be attached to the inner wall of the threaded pipe, pressure is dispersed, and the threaded pipe inner wall is prevented from being damaged.

[0019] (4) The threaded pipe anti-collision device, the cover plate arranged at the other end of the screw rod can shield the containing hole to prevent sundries from entering the containing hole and hindering rotation of the screw rod, the handle arranged on the cover plate facilitates an operator to rotate the screw rod or remove the screw rod, and the first mark on the protection section and the second mark on the cover plate respectively indicate positions of the smooth groove and the guide strip, so that the operator can identify the alignment state between the smooth groove and the guide strip, and then operates the screw rod to be tightened or removed. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation for the illustrative embodiments of the present application, and do not constitute improper limitations to the present application. In the drawings:

[0021] Figure 1 A structure schematic view of the threaded pipe anti-collision device described in the embodiment of the present application;

[0022] Figure 2 A cross-sectional view of the protection section of the threaded pipe anti-collision device described in the embodiment of the present application;

[0023] Figure 3 A left view of the threaded pipe anti-collision device described in the embodiment of the present application;

[0024] Figure 4 A left cross-sectional view of the threaded pipe anti-collision device described in the embodiment of the present application;

[0025] Figure 5 Another state left cross-sectional view of the threaded pipe anti-collision device described in the embodiment of the present application;

[0026] Figure 6A rear view of the threaded pipe anti-collision device according to the embodiment of the utility model;

[0027] Figure 7 A stacking state schematic view of the threaded pipe anti-collision device according to the embodiment of the utility model.

[0028] Mark explanation:

[0029] 1-protective section;2-positioning protrusion;3-second mark;4-handle;5-smooth groove;6-positioning recess;7-housing hole;8-tightening rod;9-guide strip;10-insertion section;11-connecting rod;12-locking strip;13-abutting head;14-first mark;15-cover plate. Specific implementation

[0030] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0031] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0032] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0034] A threaded pipe anti-collision device, such as Figure 1 、 3, 6, comprising: a pipe end plug, a screwing rod 8 and a locking piece; wherein the pipe end plug comprises an insertion section 10 and a protection section 1, the insertion section 10 is used to be inserted into the threaded pipe, providing support from the inside of the threaded pipe, preventing the threaded pipe from being deformed when it is impacted; the outer diameter of the protection section 1 is larger than that of the insertion section 10, the protection section 1 can be abutted against the end of the threaded pipe, forming a barrier outside the end of the threaded pipe, avoiding the end of the threaded pipe from being impacted from outside. In actual use, the outer diameter of the insertion section 10 is the same as the minimum inner diameter of the threaded pipe, the outer diameter of the protection section 1 is the same as the maximum outer diameter of the threaded pipe, the insertion section 10 and the protection section 1 are integrally made of a material with micro-elasticity, such as rubber, silica gel, etc.; the micro-elasticity of the insertion section 10 can be used to insert it into the threaded pipe and provide support to the threaded pipe, and the protection section 1 can offset the external impact by its own elasticity, providing protection to the threaded pipe.

[0035] In order to enable the screwing rod 8 to abut against the locking piece to lock the pipe end plug in the threaded pipe, as shown in Figure 4 、 5 , a receiving hole 7 is provided on the end face of the protection section 1 away from the insertion section 10, and an internal thread is provided on the inner wall of the receiving hole 7; the screwing rod 8 is detachably arranged in the receiving hole 7, when the screwing rod 8 is placed inside the receiving hole 7, the axis of the screwing rod 8 coincides with the axis of the receiving hole 7, and a abutting head 13 is further provided on one end of the screwing rod 8, which can push the locking piece out of the insertion section 10. A guide strip 9 is provided on the outer wall of the screwing rod 8, the two ends of the guide strip 9 respectively extend to the two ends of the screwing rod 8, the length direction of the guide strip 9 is parallel to the axis direction of the screwing rod 8, and an external thread is provided on the guide strip 9, which can cooperate with the internal thread, the screwing rod 8 can be screwed in the direction of inserting into the receiving hole 7 through the thread cooperation between the guide strip 9 and the receiving hole 7, so that the abutting head 13 can keep the state of pushing the locking piece out of the insertion section 10, and the pipe end plug is locked inside the threaded pipe. When locking, the thread cooperation between the guide strip 9 and the inner wall of the receiving hole 7 is utilized when the screwing rod 8 is rotated, the screwing direction is the direction of inserting the screwing rod 8 into the receiving hole 7 along the axis of the receiving hole 7, after the screwing rod 8 is screwed, the abutting head 13 can push the locking piece out, the locking piece is abutted against the inner wall of the threaded pipe, and after screwing, due to the friction between the internal thread and the external thread, the screwing rod 8 is not easy to be loosened from the receiving hole 7, which is conducive to maintaining the locking state of the pipe end plug, avoiding the pipe end plug from falling off the end of the threaded pipe and losing the anti-impact protection ability to the threaded pipe.

[0036] In order to facilitate the pipe end plug to release the locking state, as shown in Figure 2The pipe plug can be quickly detached from the threaded pipe. A smooth groove 5 is arranged on the inner thread for avoiding the guiding strip 9. The two ends of the smooth groove 5 extend to the bottom surface and the opening of the accommodating hole 7 respectively. The length direction of the smooth groove 5 is parallel to the axis direction of the accommodating hole 7. The size of the smooth groove 5 is slightly larger than that of the guiding strip 9. The guiding strip 9 can be accommodated in the smooth groove 5. When the rotating rod 8 is rotated to the angle at which the guiding strip 9 is opposite to the smooth groove 5, the smooth groove 5 can accommodate the guiding strip 9. At the same time, the external thread on the guiding strip 9 is no longer matched with the internal thread on the accommodating hole 7. The guiding strip 9 can slide in the smooth groove 5 along the axis direction of the accommodating hole 7. At this time, the rotating rod 8 can slide along the axis direction of the accommodating hole 7. The rotating rod 8 can be quickly detached from the accommodating hole 7 by sliding. The state that the locking member is pushed out of the insertion section 10 by the abutting head 13 is released. The locking of the pipe plug in the threaded pipe is released. The pipe plug can be quickly detached from the end of the threaded pipe.

[0037] In order to make the locking member freely pushed out or retracted from the insertion section 10, a locking hole is arranged on the outer side wall of the insertion section 10 and communicates with the accommodating hole 7. The locking member is slidingly arranged in the locking hole. The locking member can extend out of the locking hole and abut against the inner wall of the threaded hole to lock the pipe plug at the end of the threaded pipe. The locking member retracted into the locking hole can release the locking of the pipe plug. The pipe plug can be detached from the end of the threaded pipe. In order to make the abutting head 13 push out the locking member, the bottom end of the locking member extends into the accommodating hole 7 along the locking hole and contacts the abutting head 13. The abutting head 13 moves to the direction of the locking hole to push out the locking member from the locking hole. When the abutting head 13 moves away from the locking hole, the locking member can rely on its own gravity to fall into the locking hole to release the locking of the pipe plug in the threaded pipe.

[0038] For example, in order to make the abutting head 13 more smoothly push out the locking member, the abutting head 13 is a circular truncated cone. The large end of the circular truncated cone abutting head 13 is connected with the rotating rod 8. The bottom end of the locking member extending into the accommodating hole 7 contacts the side wall of the circular truncated cone abutting head 13. During the movement of the abutting head 13 to the direction of the locking hole, the bottom end of the locking member moves along the side wall of the circular truncated cone abutting head 13 to the large end of the circular truncated cone. The locking member is gradually pushed out of the insertion section 10 by the abutting head 13 to lock the pipe plug at the end of the threaded pipe. When the abutting head 13 moves away from the locking hole, the bottom end of the locking member moves on the side wall of the circular truncated cone abutting head 13 to the small end of the circular truncated cone. The locking member gradually falls into the locking hole to release the locking of the pipe plug.

[0039] An optional embodiment of the present embodiment is that the locking member includes a connecting rod 11 and a locking strip 12, the bottom end of the connecting rod 11 extends into the accommodating hole 7 along the bottom end of the locking hole and is in contact with the abutting head 13, the locking strip 12 is arranged at the top end of the connecting rod 11, and the connecting rod 11 can drive the locking strip 12 to be pushed out of the insertion section 10 or to be retracted when the abutting head 13 is lifted or falls away from the locking hole, so as to switch between the locking of the pipe plug at the threaded pipe end and the unlocking. In order to prevent the connecting rod 11 from falling off from the abutting of the abutting head 13 and falling into the accommodating hole 7 after the tightening rod 8 is disassembled from the accommodating hole 7, the locking strip 12 is perpendicular to the connecting rod 11, the length of the locking strip 12 is greater than the outer diameter of the connecting rod 11, the locking strip 12 cannot pass through the locking hole when the connecting rod 11 falls into the accommodating hole 7 in the locking hole, so as to limit the connecting rod 11 from falling into the accommodating hole 7, and ensure that the abutting head 13 can be in contact with the bottom end of the connecting rod 11 again and lift the connecting rod 11, so that the locking strip 12 can be pushed out of the insertion section 10. The locking strip 12 can also be inserted into the recess inside the threaded gap on the inner wall of the threaded pipe, and the locking strip 12 can be inserted into the recess inside the threaded gap, so that the locking member cannot move in the axial direction of the threaded pipe, the pipe plug cannot move in the axial direction of the threaded pipe, the pipe plug is locked at the end of the threaded pipe, and the pipe plug is prevented from falling off.

[0040] In addition, a groove for accommodating the locking strip 12 is also arranged on the side wall of the insertion section 10, the groove is communicated with the accommodating hole 7 through the locking hole, the inner diameter of the groove is greater than the inner diameter of the locking hole, in order to avoid the locking strip 12 from hindering the disassembly of the pipe plug from the threaded pipe end, the groove can accommodate the locking strip 12 completely, when the connecting rod 11 falls into the accommodating hole 7 after being separated from the abutting of the abutting head 13, the locking strip 12 also falls into the groove completely, so that the locking strip 12 does not hinder the disassembly of the pipe plug, and the locking strip 12 does not continue to fall into the accommodating hole 7 after falling into the groove completely, so as to avoid that the connecting rod 11 falls into the accommodating hole 7 and loses the function of pushing out the locking strip 12.

[0041] Specifically, in order to improve the smoothness when the connecting rod 11 is abutted by the abutting head 13, the bottom end of the connecting rod 11 is provided with a slope which can cooperate with the abutting head 13, the connecting rod 11 is in contact with the side wall of the abutting head 13 through the slope, the abutting head 13 can smoothly lift the connecting rod 11 when moving to the locking hole, so that the connecting rod 11 remains stable during movement, and the locking strip 12 can also be smoothly and stably pushed out.

[0042] To maximize the contact area between the locking strip 12 and the inner wall of the threaded tube, the locking strip 12 is an arc-shaped strip with its arc center facing the connecting rod. The top surface of the arc-shaped strip can fit against the inner wall of the threaded tube, and the arc-shaped strip can disperse the pressure on the inner wall of the threaded tube through a larger contact area, avoiding damage to the inner wall of the threaded tube. In this embodiment, the top end of the arc-shaped strip can be inserted into the recess of the threaded gap on the inner wall of the threaded tube. Relying on the threaded gap, the arc-shaped strip cannot move in the axial direction of the threaded tube, thereby locking the tube plug at the end of the threaded tube. During the movement or transportation of the threaded tube, the tube plug will not fall off the end of the threaded tube due to vibration or other reasons, ensuring the tube plug's ability to protect the end of the threaded tube from impact.

[0043] In one optional implementation of this embodiment, to reduce mutual friction between threaded tubes in a stacked state, especially to avoid frictional collisions caused by displacement between the threaded tubes during transportation, multiple positioning protrusions 2 and multiple positioning recesses 6 are provided on the side wall of the protective section 1. The positioning protrusions 2 and positioning recesses 6 are alternately arranged and evenly distributed on the side wall of the protective section 1. In practical use, a common stacking method for threaded tubes is as follows: Figure 7 As shown, due to the shape characteristics of the threaded pipe, three positioning protrusions 2 and three positioning recesses 6 are respectively provided on the side wall of the protective section 1. A pair of positioning protrusions 2 and positioning recesses 6 are located on both sides of the protective section 1 in the horizontal direction, and the line connecting the center of the pair of positioning protrusions 2 and the center of the positioning recesses 6 passes through the axis of the protective section 1. The angle between the lines connecting two adjacent positioning protrusions 2 and positioning recesses 6 and the axis of the protective section 1 is 60 degrees. When stacked, the positioning protrusions 2 can be inserted into the positioning recesses 6 of the pipe end plugs on adjacent threaded pipes. The positioning protrusions 2 and positioning recesses 6 between multiple threaded pipes can be inserted and cooperate with each other. Combined with the locking state of the pipe end plugs at the ends of the threaded pipes, axial movement between the threaded pipes can be prevented, avoiding damage caused by friction and collision between the threaded pipes.

[0044] Optionally, to prevent debris from entering the receiving hole 7 and obstructing the normal operation of the tightening rod 8, a cover plate 15 is provided at the other end of the tightening rod 8. A handle 4 is provided on the end face of the cover plate 15 away from the tightening rod 8. The cover plate 15 can cover the opening of the receiving hole 7 when the tightening rod 8 is inserted into the receiving hole 7, reducing the possibility of debris, dust and other contaminants entering the receiving hole 7. This can, to a certain extent, avoid affecting the rotation or sliding removal of the tightening rod 8. The handle 4 on the cover plate 15 makes it convenient for the operator to rotate the tightening rod 8, so that the tightening rod 8 is tightened inside the receiving hole 7 and the locking member is pushed out by the abutment head 13. At the same time, it ensures that the top of the locking member can be pressed against the inner wall of the threaded tube. When the guide bar 9 is aligned with the smooth groove 5, the handle 4 can be pulled to slide the tightening rod 8 out of the receiving hole 7.

[0045] In order to identify the position of the guide strip 9 and the smooth groove 5, the two can be quickly aligned to take out the screw rod 8, the protection section 1 is provided with a first mark 14 opposite to the smooth groove 5 on the end face away from the insertion section 10, and the cover plate 15 is provided with a second mark 3 opposite to the guide strip 9 on the end face away from the insertion section 10. The operator can use the position of the smooth groove 5 indicated by the first mark 14 and the position of the guide strip 9 indicated by the second mark 3, and the first mark 14 and the second mark 3 are opposite to each other, so that the guide strip 9 and the smooth groove 5 are opposite to each other, and the screw rod 8 can be quickly taken out, and the pipe plug can be quickly disassembled from the end of the threaded pipe.

[0046] The threaded pipe anti-collision device provided by the embodiment can make the screw rod rotate in the accommodating hole and drive the abutting head to push out the locking piece, so that the top end of the locking strip is inserted into and abuts against the internal thread recess in the inner wall of the threaded pipe, the pipe plug is locked in the axial direction of the threaded pipe, the pipe plug is prevented from falling off, the insertion section located in the threaded pipe can be made into a threaded pipe, and the threaded pipe is prevented from being deformed due to impact in cooperation with the protection section. When the guide strip is opposite to the smooth groove, the screw rod can be quickly taken out from the accommodating hole, the locking piece can fall back, the pipe plug can be quickly disassembled from the end of the threaded pipe, the arc-shaped locking strip can disperse the pressure between the contact surface and the threaded pipe, the inner wall of the threaded pipe is prevented from being damaged, the operator can conveniently operate the screw rod by using the handle on the cover plate, and the pipe plug can be locked or disassembled by relying on the indication of the first mark and the second mark. The positioning protrusions and the positioning recesses on the protection section can be inserted into each other, and the collision and friction between a plurality of threaded pipes in a stacked state are avoided.

[0047] The above only describes preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A threaded pipe anti-collision device, characterized in that, The utility model relates to a pipe end plug, and it comprises an insertion section (10) and a protection section (1), the outer diameter of the protection section (1) is larger than that of the insertion section (10), a receiving hole (7) is arranged on the end face of the protection section (1) far from the insertion section (10), an internal thread is arranged on the inner wall of the receiving hole (7), a screwing rod (8) is detachably arranged in the receiving hole (7), a stop head (13) is further arranged on one end of the screwing rod (8), a guide strip (9) is arranged on the outer wall of the screwing rod (8), the two ends of the guide strip (9) extend to the two ends of the screwing rod (8) respectively, and an external thread is arranged on the guide strip (9) and can be matched with the internal thread, a smooth groove (5) is further arranged on the internal thread and used for avoiding the guide strip (9), and the two ends of the smooth groove (5) extend to the bottom face and the opening of the receiving hole (7) respectively, when the guide strip (9) is opposite to the smooth groove (5), the screwing rod (8) can slide along the axial direction of the receiving hole (7), a locking hole is arranged on the outer side wall of the insertion section (10) and is communicated with the receiving hole (7), and a locking piece is slidably arranged in the locking hole, the bottom end of the locking piece extends into the receiving hole (7) along the locking hole and is in contact with the stop head (13), and the stop head (13) is moved to the direction of the locking hole to push the locking piece out of the locking hole. A plurality of positioning protrusions (2) and a plurality of positioning recesses (6) are arranged on the side wall of the protection section (1), the positioning protrusions (2) and the positioning recesses (6) are alternately arranged and uniformly distributed on the side wall of the protection section (1).

2. A threaded pipe anti-collision device according to claim 1, characterized in that: The stop head (13) is a circular truncated cone, and the large end of the circular truncated cone stop head (13) is connected with the screwing rod (8).

3. A threaded pipe anti-collision device according to claim 1, characterized in that: The locking piece comprises a connecting rod (11) and a locking strip (12), the bottom end of the connecting rod (11) extends into the receiving hole (7) along the bottom end of the locking hole and is in contact with the stop head (13), the locking strip (12) is arranged on the top end of the connecting rod (11), the locking strip (12) is perpendicular to the connecting rod (11), and the length of the locking strip (12) is greater than the outer diameter of the connecting rod (11).

4. A threaded pipe anti-collision device according to claim 1, characterized in that: The bottom end of the connecting rod (11) is provided with an inclined surface matched with the stop head (13).

5. A threaded pipe anti-collision device according to claim 4, characterized in that: A groove for accommodating the locking strip (12) is further arranged on the side wall of the insertion section (10), and the groove is communicated with the receiving hole (7) through the locking hole.

6. A threaded pipe anti-collision device according to claim 4, characterized in that: The locking strip (12) is an arc-shaped strip, and the arc center of the locking strip (12) faces the connecting rod (11).

7. A threaded pipe anti-collision device according to claim 1, characterized in that: The other end of the screwing rod (8) is provided with a cover plate (15), and a handle (4) is arranged on the end face of the cover plate (15) far from the screwing rod (8).

8. A threaded pipe anti-collision device according to claim 1, characterized in that: A first mark (14) opposite to the smooth groove (5) is arranged on the end face of the protection section (1) far from the insertion section (10), and a second mark (3) opposite to the guide strip (9) is arranged on the end face of the cover plate (15) far from the insertion section (10).

9. A threaded pipe anticollision device according to claim 8, characterized in that: ​

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