Rapid transition metal negative angle anti-falling airtight thread
By designing fast transition metal negative angle anti-degassing threads, the problem of traditional oil pipe threads is easily prone to sticking, burrs and flanking during repeated loading and unloading, achieving higher durability and sealing effect, and extending use Lifespan and reduce maintenance costs.
Patent Information
- Application Number
- CN202421495155.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-27
AI Technical Summary
Traditional oil pipe threads are prone to problems such as fastening, burrs and flange during repeated loading and unloading, resulting in a short service life and cannot effectively meet the sealing requirements of oil pipe connections.
A fast transition metal negative angle anti-de-detach thread is designed. By setting multiple internal and external teeth on the internal and external threads, and optimizing the rounded corner design, increasing the fitting gap to reduce thread grease accumulation and extending Wear and improve sealing effect through the engagement structure of the internal and external teeth.
It significantly improves the durability and sealing effect of threads, extends the service life by 20%-30%, reduces maintenance and replacement frequency and related costs, and improves economic benefits and reliability in industrial applications.
Smart Images
Figure CN222527090U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of petroleum pipes, in particular to a rapid transition metal negative angle anti-stripping airtight thread. Background Art
[0002] A large number of oil steel pipes are used in the process of oil extraction and transmission. It is necessary to connect oil steel pipes of fixed length to achieve the required length. After the oil pipes are connected, they need to achieve a certain degree of sealing, so a sealed threaded connection is required. For the oil pipe industry, there are special thread types, such as the widely used API thread buckle type of the American Petroleum Institute. At the same time, in order to meet the different needs of their customers, various oil pipe manufacturers will also launch special thread buckle types.
[0003] After the traditional thread buckle is repeatedly loaded and unloaded 3-4 times, the steel pipe thread will begin to have problems such as sticking, burrs, and flanging. After repeated loading and unloading 7-8 times, the thread will be directly damaged and cannot be used. Therefore, a quick transition metal negative angle anti-detachment airtight thread is proposed to solve the above problems. Utility Model Content
[0004] In order to make up for the above shortcomings, the utility model provides a quick transition metal negative angle anti-stripping airtight thread, aiming to improve the problem of low service life of traditional thread buckles.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fast transition metal negative angle anti-slip airtight thread, including an internal thread and an external thread, wherein a plurality of internal teeth are arranged inside the internal thread, an internal angle one is arranged on the left side of the bottom of the internal tooth, an internal angle two is arranged on the left side of the top of the internal tooth, an internal angle three is arranged on the right side of the top of the internal tooth, and an internal angle four is arranged on the right side of the bottom of the internal tooth, and a plurality of external teeth are arranged inside the external thread, an external angle one is arranged on the right side of the bottom of the external tooth, an external angle two is arranged on the right side of the top of the external tooth, an external angle three is arranged on the left side of the top of the external tooth, and an external angle four is arranged on the left side of the bottom of the external tooth.
[0006] As a further description of the above technical solution:
[0007] The radius length of the inner angle 1 is 0.25 mm, the radius length of the inner angle 2 is 0.7 mm, the radius length of the inner angle 3 is 0.4 mm, and the radius length of the inner angle 4 is 0.4 mm.
[0008] As a further description of the above technical solution:
[0009] The radius length of the outer corner one is 0.15 mm, the radius length of the outer corner two is 0.85 mm, the radius length of the outer corner three is 0.5 mm, and the radius length of the outer corner four is 0.3 mm.
[0010] As a further description of the above technical solution:
[0011] The deflection angle between the second external angle and the third external angle is 1°47′2″, and the deflection angle between the third external angle and the fourth external angle is -3°30′.
[0012] As a further description of the above technical solution:
[0013] The deflection angle between the second external angle and the first external angle is 10°, and the depth of the external tooth is 1.982 mm.
[0014] As a further description of the above technical solution:
[0015] The deflection angle between the inner angle 2 and the inner angle 3 is 1°47′2″, and the deflection angle between the inner angle 3 and the inner angle 4 is -3°30′.
[0016] As a further description of the above technical solution:
[0017] The deflection angle between the inner angle 2 and the inner angle 1 is 10°, and the depth of the inner tooth is 2.382 mm.
[0018] As a further description of the above technical solution:
[0019] The distance between the two inner corners 4 and the distance between the two outer corners 4 are both 6.35 mm.
[0020] The utility model has the following beneficial effects:
[0021] 1. After repeated loading and unloading tests, the device showed significant improvement in durability. In the first 3-4 loading and unloading processes, the threaded interface operated well without burrs or flanging problems, and maintained a stable working state. It was not until the number of loading and unloading increased to 6-7 times that burrs and flanging began to be gradually observed, and damage was not caused until 9-10 times. Through testing and performance monitoring, it was found that the service life of the device was effectively extended by 20%-30%. This achievement not only shows that the product is more durable and reliable in actual operation, but also significantly reduces the frequency and related costs of maintenance and replacement, thereby providing significant economic benefits and reliability guarantees in industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The utility model provides a three-dimensional schematic diagram of a rapid transition metal negative angle anti-stripping airtight thread.
[0023] Legend:
[0024] 1. Internal thread; 2. External thread; 3. Internal teeth; 4. External teeth; 101. Internal angle one; 102. Internal angle two; 103. Internal angle three; 104. Internal angle four; 201. External angle one; 202. External angle two; 203. External angle three; 204. External angle four. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Reference Figure 1 , an embodiment provided by the utility model: a fast transition metal negative angle anti-stripping airtight thread, comprising an internal thread 1 and an external thread 2, a plurality of internal teeth 3 are arranged inside the internal thread 1, an internal angle 101 is arranged on the left side of the bottom of the internal teeth 3, an internal angle 2 102 is arranged on the left side of the top of the internal teeth 3, an internal angle 3 103 is arranged on the right side of the top of the internal teeth 3, and an internal angle 4 104 is arranged on the right side of the bottom of the internal teeth 3, a plurality of external teeth 4 are arranged inside the external thread 2, an external angle 101 is arranged on the right side of the bottom of the external teeth 4, an external angle 202 is arranged on the right side of the top of the external teeth 4, an external angle 3 203 is arranged on the left side of the top of the external teeth 4, and an external angle 4 204 is arranged on the left side of the bottom of the external teeth 4, the radius length of the internal angle 101 is 0.25mm, the radius length of the internal angle 2 102 is 0.7mm, the radius length of the internal angle 3 103 is 0.4mm, the radius length of the internal angle 4 104 is 0.4mm, and the external angle 101 is 0.25mm, the radius length of the internal angle 2 102 is 0.7mm, the radius length of the internal angle 3 103 is 0.4mm, and the radius length of the internal angle 4 104 is 0.4mm. The radius length of the outer corner 1 is 0.15mm, the radius length of the outer corner 202 is 0.85mm, the radius length of the outer corner 3 203 is 0.5mm, the radius length of the outer corner 4 204 is 0.3mm, the deflection angle between the outer corner 202 and the outer corner 3 203 is 1°47′2″, the deflection angle between the outer corner 3 203 and the outer corner 4 204 is -3°30′, the deflection angle between the outer corner 202 and the outer corner 1 201 is 10 °, the depth of the outer tooth 4 is 1.982mm, the deflection angle between the inner angle 2 102 and the inner angle 3 103 is 1°47′2″, the deflection angle between the inner angle 3 103 and the inner angle 4 104 is -3°30′, the deflection angle between the inner angle 2 102 and the inner angle 1 101 is 10°, the depth of the inner tooth 3 is 2.382mm, and the distances between the two inner angles 4 104 and between the two outer angles 4 204 are both 6.35mm.
[0027] Specifically, the thread buckle is one of the thread buckle types of oil pipe thread buckles, and it is named QMT buckle type. In the internal thread 1 and the external thread 2, the fillets of various places are redistributed by using the internal angle 101 and the external angle 201 in combination, the internal angle 102 and the external angle 202 in combination, the internal angle 3 103 and the external angle 3 203 in combination, and the internal angle 4 104 and the external angle 4 204 in combination, so as to increase the matching clearance, effectively solve the sticking phenomenon caused by the accumulation of thread grease, and prolong the wear of the thread during repeated loading and unloading. Through the engagement between the internal teeth 3 and the external teeth 4, the thread surfaces on the right side of the internal teeth 3 and the left side of the external teeth 4 become the bearing surfaces after matching, which plays a decisive role in the sealing effect of the oil pipe after assembly. The angle is increased to -3°30′ on the basis of the original -3° in the traditional thread buckle to provide a better sealing effect, but the angle should not be increased because it will have a serious impact on thread processing and repeated loading and unloading.
[0028] Working principle: Through the mutual cooperation of the fillets in the internal teeth 3 and the external teeth 4 on the internal thread 1 and the external thread 2, the device has a good thread grease accommodation effect and a better sealing effect, ensuring that the contact stress between the threads will not be concentrated when the threads have sufficient connection strength, and the contact can be more uniform. At the same time, the volume space of the thread grease is also increased, and no accumulation is caused, so that the role of thread grease lubrication is fully exerted. The internal threads 1 and the external threads 2 of the device are repeatedly threaded and unthreaded, and it is found that there are no defects such as burrs and flanging at the thread fillets, which avoids defects at the transition of the thread fillets under high torque conditions, making the thread less prone to sticking, and achieving the purpose of maintaining a good sealing effect under high axial loads. Under compression and tension conditions, the mechanical properties of the thread are more superior, and the working performance of the threaded connection is not affected, so that the service life of the thread buckle is effectively increased by 20%-30%.
[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A rapid transition metal negative angle anti-stripping airtight thread, comprising an internal thread (1) and an external thread (2), characterized in that: The internal thread (1) is provided with a plurality of internal teeth (3), the internal teeth (3) are provided with an internal angle 1 (101) on the left side of the bottom, the internal teeth (3) are provided with an internal angle 2 (102) on the left side of the top, the internal teeth (3) are provided with an internal angle 3 (103) on the right side of the top, and the internal teeth (3) are provided with an internal angle 4 (104) on the right side of the bottom. The external thread (2) is provided with a plurality of external teeth (4), the external teeth (4) are provided with an external angle 1 (201) on the right side of the bottom, the external teeth (4) are provided with an external angle 2 (202) on the right side of the top, the external teeth (4) are provided with an external angle 3 (203) on the left side of the top, and the external teeth (4) are provided with an external angle 4 (204) on the left side of the bottom.
2. A rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The radius length of the inner angle one (101) is 0.25 mm, the radius length of the inner angle two (102) is 0.7 mm, the radius length of the inner angle three (103) is 0.4 mm, and the radius length of the inner angle four (104) is 0.4 mm.
3. The rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The radius length of the outer corner one (201) is 0.15 mm, the radius length of the outer corner two (202) is 0.85 mm, the radius length of the outer corner three (203) is 0.5 mm, and the radius length of the outer corner four (204) is 0.3 mm.
4. The rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The deflection angle between the second external angle (202) and the third external angle (203) is 1°47′2″, and the deflection angle between the third external angle (203) and the fourth external angle (204) is -3°30′.
5. The rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The deflection angle between the second external angle (202) and the first external angle (201) is 10°, and the depth of the external tooth (4) is 1.982 mm.
6. The rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The deflection angle between the inner angle 2 (102) and the inner angle 3 (103) is 1°47′2″, and the deflection angle between the inner angle 3 (103) and the inner angle 4 (104) is -3°30′.
7. The rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The deflection angle between the second inner angle (102) and the first inner angle (101) is 10°, and the depth of the inner tooth (3) is 2.382 mm.
8. The rapid transition metal negative angle anti-stripping airtight thread according to claim 1, characterized in that: The distance between the two inner corners (104) and the distance between the two outer corners (204) are both 6.35 mm.