Pipe end thread protector

Abstract

The utility model discloses a pipe end thread protector and belongs to the technical field of thread protection devices. The pipe end thread protector comprises a plastic protection ring, internal threads are arranged on the inner wall of the plastic protection ring, and a steel ring shell is connected to the outer wall of the plastic protection ring in a sleeved mode. Wherein a plastic protection ring groove is formed in the end portion of the plastic protection ring, the end portion of the steel ring shell is in an arc shape, and the end portion of the steel ring shell is installed in the plastic protection ring groove in a clamped mode. According to the utility model, the plastic protection ring is in threaded connection with the sleeve, and the steel ring shell is arranged on the outer wall of the plastic protection ring in a sleeving manner, so that the impact strength of the plastic protection ring is effectively enhanced, and the external threads of the sleeve are further protected; the plastic protection ring is arranged in the sleeve and is clamped with the end part of the steel ring shell in a matched manner, and in the actual use process, the sleeve rotates to drive the plastic protection ring to rotate, so that the problem that the steel ring shell falls off from the plastic protection ring due to the rotation of the steel ring shell along with the plastic protection ring is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of thread protection devices, and in particular relates to a pipe end thread protector. Background Art

[0002] The demand for oil casing and tubing has also increased, and the demand for pipe end thread protectors has also increased accordingly.

[0003] The casing and / or pipe has a pin end and a box end. The box end includes internal threads, which are naturally protected by being placed inside the pipe or casing. The pin end has threads on the outside of the pipe or casing, which are exposed and may be damaged. During the transportation of pipes, the existing thread protectors are easy to fall off or be damaged, which further easily causes damage to the casing threads, resulting in poor thread sealing performance or sealing failure, resulting in serious consequences such as leakage of the pipe column. Utility Model Content

[0004] The utility model aims to provide a pipe end thread protector, which solves the technical problem in the prior art that the thread protector is easy to fall off or be damaged, resulting in poor thread sealing performance or sealing failure, by arranging a double protection structure on the sleeve.

[0005] The technical solution adopted by the utility model is that the pipe end thread protector comprises a plastic protection ring, the inner wall of the plastic protection ring is provided with an internal thread, and the outer wall of the plastic protection ring is sleeved with a steel ring shell;

[0006] Among them, a plastic protection ring groove is provided at the end of the plastic protection ring, the end of the steel ring shell is in an arc shape, and the end of the steel ring shell is clamped and installed in the plastic protection ring groove.

[0007] The utility model is also characterized in that:

[0008] The outer wall of the plastic protection ring is provided with a groove of the outer wall of the plastic part, and the inner wall of the steel ring shell is provided with a protrusion, which is matched and connected with the groove of the outer wall of the plastic part.

[0009] The protrusion and the groove on the outer wall of the plastic part are both arc-shaped structures.

[0010] An outer platform and an inner platform are sequentially arranged at the end of the plastic protective ring near the edge along the direction close to the axis, and a plastic protective ring groove is formed between the outer platform and the inner platform. The height of the outer platform is greater than the height of the inner platform, and the outer wall of the outer platform is arranged as an inclined surface. The top end of the outer platform abuts against the inner wall of the end of the steel ring shell, and the end of the steel ring shell extends into the plastic protective ring groove, and the outer wall of the end of the steel ring shell abuts against the outer wall of the inner platform.

[0011] The ends of the outer platform, the inner platform and the steel ring shell are divided into at least two equal sections along the axis of the steel ring shell. After the equal division, the ends of the outer platform, the inner platform and the steel ring shell at corresponding positions cooperate with each other.

[0012] The top wall of the plastic protection ring is concavely arranged with a steel sleeve groove toward the internal thread, and the bottom wall of the steel sleeve groove is flush with the top end of the internal thread.

[0013] The top wall of the plastic protection ring is provided with a plurality of through holes.

[0014] The beneficial effects of the utility model are:

[0015] The utility model effectively enhances the impact resistance of the plastic protective ring by threading a plastic protective ring on the sleeve and sleeves a steel ring shell on the outer wall of the plastic protective ring, further realizing protection of the external thread of the sleeve, and by providing a plastic protective ring groove at the end of the plastic protective ring, which cooperates and snaps with the end of the steel ring shell. During actual use, the rotation of the sleeve will drive the plastic protective ring to rotate. This structure avoids the problem of the steel ring shell falling off the plastic protective ring due to the rotation of the plastic protective ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the pipe end thread protector of the utility model;

[0017] Figure 2 yes Figure 1 sectional view of .

[0018] In the figure, 1. steel ring housing, 2. plastic protective ring, 3. first groove, 4. second groove, 5. protrusion, 6. third groove, 7. internal thread. DETAILED DESCRIPTION

[0019] The utility model is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Example 1

[0021] like Figure 1 and Figure 2 As shown, the pipe end thread protector disclosed in the utility model comprises a plastic protection ring 2, the inner wall of the plastic protection ring 2 is provided with an internal thread 7, and the outer wall of the plastic protection ring 2 is sleeved with a steel ring housing 1;

[0022] Among them, a first groove 3 is provided at the end of the plastic protection ring 2, and the end of the steel ring shell 1 is arc-shaped, and the end of the steel ring shell 1 is clamped and installed inside the first groove 3.

[0023] In this embodiment, the plastic protective ring 2 is injection molded and in direct contact with the sleeve. The internal thread 7 on the inner wall of the plastic protective ring 2 matches the external thread of the sleeve that meets the standard requirements. A steel ring shell 1 is further sleeved on the outer wall of the plastic protective ring 2, which can effectively enhance the impact resistance of the plastic protective ring 2 and further protect the external thread of the sleeve. In addition, a first groove 3 is provided at the end of the plastic protective ring 2 to engage with the end of the steel ring shell 1. During actual use, the rotation of the sleeve will drive the plastic protective ring 2 to rotate. This structure avoids the problem of the steel ring shell 1 falling off the plastic protective ring 2 due to the rotation of the plastic protective ring 2.

[0024] Furthermore, an outer platform and an inner platform are sequentially arranged at the end of the plastic protective ring 2 near the edge along the direction close to the axis, and a first groove 3 is formed between the outer platform and the inner platform. The height of the outer platform is greater than the height of the inner platform, and the outer wall of the outer platform is arranged as an inclined surface. The top end of the outer platform abuts against the inner wall of the end of the steel ring shell 1, and the end of the steel ring shell 1 extends into the first groove 3, and the outer wall of the end of the steel ring shell 1 abuts against the outer wall of the inner platform.

[0025] In this embodiment, in order to realize the snap-fit ​​assembly between the steel ring shell 1 and the plastic protective ring 2, the arc-shaped end of the steel ring shell 1 is extended into the first groove 3. In order to prevent the arc-shaped end of the steel ring shell 1 from falling off, an outer platform and an inner platform are sequentially arranged near the edge of the end of the plastic protective ring 2 along the direction close to the axis. By setting the heights of the outer platform and the inner platform, and by abutting the top of the outer platform against the inner wall of the arc-shaped end of the steel ring shell 1, the above-mentioned structures work together to snap the arc-shaped end of the steel ring shell 1 into the first groove 3, thereby preventing the plastic protective ring 2 from rotating and causing the steel ring shell 1 to fall off.

[0026] Furthermore, the ends of the outer platform, the inner platform and the steel ring shell 1 are divided into at least two equal sections along the axis of the steel ring shell 1, and after the equal division, the ends of the outer platform, the inner platform and the steel ring shell 1 at corresponding positions cooperate with each other.

[0027] In this embodiment, in order to facilitate the disassembly of the steel ring shell 1, the outer platform, the inner platform and the end of the steel ring shell 1 are equally divided into four sections, and an empty groove is formed between the ends of two adjacent sections of the outer platform, the inner platform and the steel ring shell 1. During disassembly, the disassembly tool can be inserted along the outer wall of the outer platform which is set as a slope. This disassembly method is more labor-saving than the method of manually pulling the steel ring shell 1 directly.

[0028] Example 2

[0029] On the basis of Example 1, a third groove 6 is provided on the outer wall of the plastic protection ring 2 , and a protrusion 5 is provided on the inner wall of the steel ring shell 1 , and the protrusion 5 is cooperatively connected with the third groove 6 .

[0030] In this embodiment, in order to further strengthen the tight connection between the outer wall of the plastic protection ring 2 and the inner wall of the steel ring housing 1, the protrusion 5 and the third groove 6 are correspondingly arranged to cooperate with each other. When in use, after the steel ring housing 1 is put on the plastic protection ring 2, the steel ring housing 1 is rotated so that the protrusion 5 on the inner wall of the steel ring housing 1 is embedded in the third groove 6 on the outer wall of the plastic protection ring 2, so as to form a tight connection. Among them, the protrusion 5 is pressed and formed.

[0031] Furthermore, the protrusion 5 and the third groove 6 are both arc-shaped structures.

[0032] This structure is conducive to the installation of the steel ring shell 1. During the disassembly process, the steel ring shell 1 is pulled upward along the arc end, and the arc wall of the protrusion 5 slowly slides out along the inner arc surface of the third groove 6, which is more labor-saving.

[0033] Example 3

[0034] On the basis of Example 1, a second groove 4 is provided on the top wall of the plastic protection ring 2 which is concave inwardly toward the internal thread 7 , and a bottom wall of the second groove 4 is flush with the top end of the internal thread 7 .

[0035] In specific operations, during assembly, an F-shaped wrench is used to clamp the outer wall of the plastic protective ring 2 and rotate it, so that the plastic protective ring 2 is sleeved on the pipe column, and the second groove 4 is concavely set, which further improves the force-bearing capacity of the plastic protective ring 2 for the F-shaped wrench and avoids damage due to large force during assembly. The bottom wall of the second groove 4 is flush with the top of the internal thread 7, which maximizes the force-bearing capacity of the plastic protective ring 2 during assembly and does not interfere with the protection of the pipe column thread.

[0036] Example 4

[0037] Based on the embodiment 1, a plurality of through holes are formed on the top wall of the plastic protection ring 2 .

[0038] In this embodiment, the through hole can play a ventilation role, and a product label buckle can be installed in the through hole.

[0039] The utility model increases the bonding strength between the steel ring shell 1 and the plastic protective ring 2 by changing the bonding form of the steel ring shell 1 and the plastic protective ring 2 without increasing the thickness of the steel ring shell 1, thereby solving the problem of the plastic protective ring 2 and the steel ring shell 1 rotating and falling off without increasing the cost.

Claims

1. Pipe end thread protector, characterized in that: It comprises a plastic protection ring (2), the inner wall of the plastic protection ring (2) is provided with an internal thread (7), and the outer wall of the plastic protection ring (2) is sleeved with a steel ring housing (1); The end of the plastic protection ring (2) is provided with a first groove (3), the end of the steel ring housing (1) is in an arc shape, and the end of the steel ring housing (1) is snap-fitted and installed inside the first groove (3).

2. The pipe end thread protector according to claim 1, characterized in that: The outer wall of the plastic protection ring (2) is provided with a third groove (6), and the inner wall of the steel ring housing (1) is provided with a protrusion (5), and the protrusion (5) is matched and connected with the third groove (6).

3. The pipe end thread protector according to claim 2, characterized in that: The protrusion (5) and the third groove (6) are both arc-shaped structures.

4. The pipe end thread protector according to claim 1, characterized in that: The end of the plastic protective ring (2) is provided with an outer platform and an inner platform in sequence along the direction close to the axis near the edge, and a first groove (3) is formed between the outer platform and the inner platform. The height of the outer platform is greater than the height of the inner platform. The outer wall of the outer platform is arranged as an inclined surface. The top end of the outer platform abuts against the inner wall of the end of the steel ring shell (1). The end of the steel ring shell (1) extends into the first groove (3), and the outer wall of the end of the steel ring shell (1) abuts against the outer wall of the inner platform.

5. The pipe end thread protector according to claim 4, characterized in that: The ends of the outer platform, the inner platform and the steel ring shell (1) are all equally divided into at least two sections along the axis of the steel ring shell (1), and after being equally divided, the ends of the outer platform, the inner platform and the steel ring shell (1) at corresponding positions cooperate with each other.

6. The pipe end thread protector according to claim 1, characterized in that: The top wall of the plastic protection ring (2) is provided with a second groove (4) which is concave inwardly toward the internal thread (7), and the bottom wall of the second groove (4) is flush with the top end of the internal thread (7).

7. The pipe end thread protector according to claim 1, characterized in that: The top wall of the plastic protection ring (2) is provided with a plurality of through holes.

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