Seamless steel tube convenient for butt joint

Abstract

The utility model relates to a seamless steel tube convenient for butt joint, which belongs to the technical field of seamless steel tubes and comprises a steel tube body, a threaded boss, a connecting sleeve and a clamping component. The threaded boss is arranged at one end of the steel pipe body. The connecting sleeve is installed at the other end of the steel pipe body, and a threaded groove matched with the threaded boss is formed in the connecting sleeve. The clamping assembly comprises two clamping plates and two bolts. The two clamping plates are symmetrically installed in the connecting sleeve, and the two ends of each clamping plate are each provided with an installation hole used for installing a bolt. According to the seamless steel pipe butt-joint device, the connecting sleeve is matched with the threaded boss, so that two seamless steel pipes can be coaxially positioned and are in butt joint into a whole, and the butt-joint precision and butt-joint efficiency of the seamless steel pipes are improved. In addition, the connecting position of the two seamless steel pipes is clamped through the clamping device connected with the connecting sleeve into a whole, and the stability of the seamless steel pipes after butt joint can be effectively improved.

Description

Technical Field

[0001] The utility model relates to a seamless steel pipe, in particular to a seamless steel pipe which is convenient for butt connection. Background Art

[0002] Seamless steel pipe is a widely used steel pipe, which is often used in pipeline systems under harsh environments such as high pressure, high temperature, and corrosion. There are mainly the following types of seamless steel pipes that are easy to connect: Welded joints: One or both ends of the seamless steel pipe can be formed into a joint by welding. Common welding methods include butt welding, spiral welding, flange butt welding, etc. Threaded connection: One or both ends of the seamless steel pipe can be processed into threads for easy threaded connection, which is usually used in low-pressure pipeline systems. Flange connection: Installing flanges at the ends of the pipes and then fixing the two sections of pipes together with bolts is a common connection method in connecting pipeline systems. Coupling connection: Using a coupling to fix two sections of pipes together is a simple connection method, suitable for some temporary or frequently disassembled pipeline systems.

[0003] For seamless steel pipes with longer lengths, when they are butt-jointed, there are often problems with positioning difficulties and slow butt-jointing efficiency. Especially when there are differences in the specifications of seamless steel pipes, seamless steel pipes connected by threads may have size mismatches, resulting in the problem of being unable to butt joint. Second, welded seamless steel pipes are not only difficult to disassemble, but also during the welding process, seamless steel pipes with differences in inner and outer diameters are difficult to accurately butt joint. Seamless steel pipes connected by flanges are not only difficult to accurately position, but also cumbersome to operate and have low butt-jointing efficiency. Seamless steel pipes connected by lay-offs are difficult to achieve good butt jointing for seamless steel pipes with errors in outer diameters, and the butt joint structure is unstable.

[0004] In summary, existing seamless steel pipes have defects such as inaccurate positioning during butt jointing, low butt jointing efficiency, and insufficient stability after butt jointing. Utility Model Content

[0005] Based on this, it is necessary to provide a seamless steel pipe that is easy to connect to the above problems.

[0006] The utility model is realized through the following technical scheme: a seamless steel pipe which is convenient for butt jointing comprises a steel pipe body, a threaded boss, a connecting sleeve and a clamping component.

[0007] The threaded boss is arranged at one end of the steel pipe body. The connecting sleeve is installed at the other end of the steel pipe body, and a threaded groove matching the threaded boss is arranged in the connecting sleeve. Two symmetrical clearance grooves are provided on the connecting sleeve. The clamping assembly is installed in the connecting sleeve. The clamping assembly includes two clamping plates and two bolts. The two clamping plates are symmetrically installed in the connecting sleeve, and the two ends of the two clamping plates extend to the outside of the connecting sleeve through the two clearance grooves respectively. Both ends of the two clamping plates are provided with mounting holes. Two bolts are fixedly connected to the mounting holes opposite to each other on the two clamping plates.

[0008] The seamless steel pipes can be connected front and back to form a whole through the cooperation between the connecting sleeve and the threaded boss, and the two adjacent seamless steel pipes are coaxially positioned to improve the docking accuracy of the seamless steel pipes. In addition, the connection of the two seamless steel pipes is clamped by a clamping device integrated with the connecting sleeve, which can effectively improve the stability of the seamless steel pipes after docking and improve the efficiency of the seamless steel pipe docking.

[0009] Furthermore, the clamping assembly also includes a slide rod, a slide seat and a spring. The slide seat is fixedly connected in the connecting sleeve. One end of the slide rod is fixedly connected to the clamping plate, and the other end is slidably connected to the slide seat. The spring is arranged in the slide seat, and one end of the spring abuts against the slide seat, and the other end abuts against the slide rod.

[0010] Furthermore, a buffer pad is installed on a side of the threaded boss away from the connecting sleeve.

[0011] Furthermore, a butt joint boss is arranged at one end of the steel pipe body close to the threaded boss, and a sealing gasket 1 is arranged on one side of the butt joint boss away from the threaded boss.

[0012] Furthermore, a positioning groove is provided at one end of the steel pipe body close to the connecting sleeve, and a sealing gasket 2 is installed in the positioning groove.

[0013] Furthermore, a positioning boss is arranged at one end of the steel pipe body close to the threaded boss. When the two steel pipe bodies are butt-jointed, the positioning boss is matched with the positioning groove.

[0014] Furthermore, a limiting boss is provided at one end of the steel pipe body close to the connecting sleeve.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model cooperates with the connecting sleeve and the threaded boss to make the seamless steel pipes connected front and back to form an integral body, and coaxially locates two adjacent seamless steel pipes to improve the docking accuracy of the seamless steel pipes. In addition, the clamping device integrated with the connecting sleeve is used to clamp the connection of the two seamless steel pipes, which can effectively improve the stability of the seamless steel pipes after docking and improve the efficiency of the seamless steel pipe docking.

[0017] 2. The utility model installs the clamping plate in the connecting sleeve through the sliding rod and the sliding seat. One end of the sliding rod in the sliding seat is slightly larger than the other end of the sliding rod. The sliding seat is provided with a corresponding mounting groove to prevent the sliding rod from falling off when the sliding rod slides in the sliding seat. Under the action of the spring, the clamping plate is close to the inner wall of the connecting sleeve, so that the two butted steel pipe bodies can easily pass through the inner sides of the two clamping plates, which is convenient for the two steel pipe bodies to be butted or separated.

[0018] 3. The utility model achieves the sealing performance of the positioning boss and the positioning groove by matching the positioning boss with the positioning groove and squeezing the sealing gasket. At the same time, when the positioning boss approaches the positioning groove, the positioning boss is guided by the contact between the arc surface and the positioning groove, making the positioning of the two steel pipe bodies more accurate.

[0019] 4. The utility model sets a limiting boss so that the connecting sleeve can slide on the outside of the steel pipe body. When the connecting sleeve is fully threaded with the threaded boss, the connecting sleeve and the limiting boss fit tightly to prevent falling off. During the installation process, the connecting sleeve can rotate relative to the steel pipe body without rotating the entire steel pipe body, thereby effectively reducing the labor intensity when docking long seamless steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a seamless steel pipe that is easy to connect according to Example 1 of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional three-dimensional structure of the seamless steel pipe;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the middle clamping assembly;

[0024] Figure 5 For two Figure 1 Schematic diagram of the three-dimensional structure of seamless steel pipes after butt jointing;

[0025] Figure 6 for Figure 5 Schematic diagram of the three-dimensional explosion structure of the seamless steel pipe.

[0026] Main component symbols

[0027] The numbers in the figure are: 1. connecting sleeve; 11. giving way groove; 2. threaded boss; 21. buffer pad; 3. clamping assembly; 31. clamping plate; 32. sliding rod; 33. sliding seat; 34. spring; 35. bolt; 10. steel pipe body; 101. docking boss; 102. positioning groove; 103. positioning boss; 104. sealing gasket 1; 105. sealing gasket 2; 106. limiting boss.

[0028] The above main component symbols are combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0029] 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.

[0030] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0032] Example 1: Please refer to Figure 1-Figure 6 This embodiment provides a seamless steel pipe that is easy to connect, including a steel pipe body 10, a threaded boss 2, a connecting sleeve 1 and a clamping assembly 3.

[0033] The threaded boss 2 is arranged at one end of the steel pipe body 10. The connecting sleeve 1 is installed at the other end of the steel pipe body 10, and a thread groove matching the threaded boss 2 is arranged in the connecting sleeve 1. When two seamless steel pipes are butt-jointed, the threaded boss 2 and the connecting sleeve 1 can not only achieve coaxial butt joint of the two seamless steel pipes, but also make the two seamless steel pipes fit tightly. Moreover, when each seamless steel pipe has the threaded boss 2 and the connecting sleeve 1 of the same specifications, even two seamless steel pipes with slightly different specifications can still achieve seamless butt joint.

[0034] Two symmetrical clearance grooves 11 are provided on the connecting sleeve 1. The clamping assembly 3 is installed in the connecting sleeve 1. The clamping assembly 3 can realize the clamping of the connection of the two steel pipe bodies 10, which can not only make the structure of the two butted steel pipe bodies 10 more stable, but also because the clamping assembly 3 and the connecting sleeve 1 are connected as one, it can effectively prevent the missing of the parts of the clamping assembly 3 and improve the efficiency of the butt installation.

[0035] Specifically, the clamping assembly 3 includes two clamping plates 31 and two bolts 35. It may also include two slide bars 32, two sliding seats 33 and two springs 34. The two clamping plates 31 are symmetrically installed in the connecting sleeve 1. The clamping plate 31 is a semicircular structure as a whole, and both ends are respectively provided with mounting plates pointing to the center of the semicircular structure, and each mounting plate is provided with a mounting hole. The two bolts 35 are respectively fixedly connected to the mounting holes opposite to each other of the two clamping plates 31. And the two ends of the two clamping plates 31 extend to the outside of the connecting sleeve 1 through two clearance grooves 11. In the butt joint operation of seamless steel pipes, after the two steel pipe bodies 10 are screwed together through the threaded boss 2 and the connecting sleeve 1, the two clamping plates 31 are just outside the connection of the two steel pipe bodies 10. By passing the two bolts 35 through the relatively arranged mounting holes and screwing and fixing them through nuts, the two clamping plates 31 are fixed to the outside of the steel pipe body 10, which can not only provide clamping support for the two steel pipe bodies 10, but also share the pressure between the connecting pipe and the threaded boss 2, thereby improving the stability of the steel pipe butt joint, and at the same time, the steel pipe connection can be sealed to avoid leakage at the steel pipe butt joint.

[0036] The sliding seat 33 is fixedly connected in the connecting sleeve 1. One end of the sliding rod 32 is fixedly connected to the clamping plate 31, and the other end is slidably connected to the sliding seat 33. The spring 34 is arranged in the sliding seat 33, and one end of the spring 34 abuts against the sliding seat 33, and the other end abuts against the sliding rod 32. The clamping plate 31 is installed in the connecting sleeve 1 through the sliding rod 32 and the sliding seat 33. The end of the sliding rod 32 in the sliding seat 33 is slightly larger than the other end of the sliding rod 32. The sliding seat 33 is provided with a corresponding installation groove to prevent the sliding rod 32 from falling off when the sliding rod 32 slides in the sliding seat 33. Under the action of the spring 34, the clamping plate 31 is close to the inner wall of the connecting sleeve 1, so that the two butted steel pipe bodies 10 can easily pass through the inner sides of the two clamping plates 31, which is convenient for the two steel pipe bodies 10 to be butted or separated from each other.

[0037] A butt joint boss 101 is provided at one end of the steel pipe body 10 near the threaded boss 2. The threaded boss 2 and the butt joint boss 101 may be integrally formed with the steel pipe body 10, or may be fixedly connected by welding or the like. In other embodiments, the threaded boss 2 may be detachably connected to the steel pipe body 10, and a clamping assembly may be provided inside the threaded boss 2, so that the threaded boss 2 may be clamped on seamless steel pipes of different outer diameters, and then the coaxial butt joint between two seamless steel pipes of different specifications may be achieved by screwing with the connecting pipe.

[0038] A sealing gasket 104 is installed on the side of the butt boss 101 away from the threaded boss 2. When two seamless steel pipes are butt-jointed, the sealing gasket 104 is located between the butt boss 101 of one steel pipe body 10 and the inner wall of the connecting sleeve 1 of the other steel pipe body 10, so as to achieve sealing at the interface of the two steel pipes. The outer diameter of the sealing gasket 104 is slightly larger than the outer diameter of the butt boss 101. When the clamping assembly 3 is just mounted on the outside of the two steel pipe bodies 10, the sealing gasket 104 is squeezed inward to improve the sealing performance of the outer ring interface of the two smooth pipe bodies.

[0039] A positioning groove 102 is provided at one end of the steel pipe body 10 close to the connecting sleeve 1, and a sealing gasket 2 105 is installed in the positioning groove 102. Correspondingly, a positioning boss 103 is provided at one end of the steel pipe body 10 close to the threaded boss 2. When the two steel pipe bodies 10 are butted, the positioning boss 103 matches the positioning groove 102, and squeezes the sealing gasket 104 to achieve the sealing performance of the positioning boss 103 and the positioning groove 102. In this embodiment, the positioning boss 103 is set in a semicircular ring shape. When the positioning boss 103 approaches the positioning groove 102, the positioning boss 103 is guided by the contact between the arc surface and the positioning groove 102, so that the positioning of the two steel pipe bodies 10 is more accurate. In other embodiments, the positioning boss 103 can also be set as a slope structure, and a plurality of guide blocks are arranged in an array on the positioning boss 103. Correspondingly, a plurality of guide grooves are arranged in the positioning groove 102 to achieve the butt joint between the positioning boss 103 and the positioning groove 102. Especially for two seamless steel pipes with different inner and outer diameters, the smaller seamless steel pipe can be butted inside the larger seamless steel pipe to improve the sealing performance of the butt joint. The sealing gasket 104 and the sealing gasket 2 105 can be made of rubber, polytetrafluoroethylene, synthetic fiber, etc., which not only have good sealing performance but also have high temperature resistance.

[0040] A buffer pad 21 is installed on the side of the threaded boss 2 away from the connecting sleeve 1. When the two seamless steel pipes are connected, the end of the connecting sleeve 1 away from the steel pipe body 10 abuts the buffer pad 21 on the threaded boss 2 to avoid wear between the threaded boss 2 and the connecting sleeve 1. In other embodiments, the connecting sleeve 1 may not have a clearance groove 11, and the buffer pad 21 may also have a sealing performance. When leakage occurs at the connection of the two steel pipe bodies 10, it can be used as a backup sealing means to achieve sealing between the steel pipes. The buffer pad 21 can be made of rubber material, sponge, cork, soft plastic, bubble film, etc.

[0041] A limiting boss 106 is provided at one end of the steel pipe body 10 close to the connecting sleeve 1, and the connecting sleeve 1 can slide on the outside of the steel pipe body 10. When the connecting sleeve 1 is completely threaded with the threaded boss 2, the connecting sleeve 1 fits tightly with the limiting boss 106 to prevent it from falling off. During the installation process, the connecting sleeve 1 can rotate relative to the steel pipe body 10 without rotating the entire steel pipe body 10, thereby effectively reducing the labor intensity when docking longer seamless steel pipes.

[0042] The seamless steel pipes that are easy to butt joint in this embodiment can be connected front and back to form an integral body through the cooperation between the connecting sleeve 1 and the threaded boss 2, and the two adjacent seamless steel pipes are coaxially positioned to improve the butt joint accuracy of the seamless steel pipes. In addition, the connection of the two seamless steel pipes is clamped by a clamping device integrated with the connecting sleeve 1, which can not only improve the stability of the seamless steel pipes after butt joint, but also realize multi-level sealing at the interface through the provided sealing member 1 and sealing member 2, effectively improve the sealing performance of the seamless steel pipe, and reduce leakage accidents during pipeline transportation.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A seamless steel pipe that is easy to butt joint, characterized in that: It includes: Steel pipe body (10); A threaded boss (2) is arranged at one end of the steel pipe body (10); A connecting sleeve (1) is installed at the other end of the steel pipe body (10), wherein a thread groove matching the threaded boss (2) is arranged in the connecting sleeve (1); and two symmetrical clearance grooves (11) are opened on the connecting sleeve (1); A clamping assembly (3) is installed in the connecting sleeve (1); the clamping assembly (3) comprises two clamping plates (31) and two bolts (35); the two clamping plates (31) are symmetrically installed in the connecting sleeve (1), and the two ends of the two clamping plates (31) respectively extend to the outside of the connecting sleeve (1) through the two clearance grooves (11); both ends of the two clamping plates (31) are provided with mounting holes; the two bolts (35) are respectively fixedly connected to the opposite mounting holes of the two clamping plates (31).

2. The seamless steel pipe for easy butt jointing according to claim 1, characterized in that: The clamping assembly (3) further comprises a sliding rod (32), a sliding seat (33) and a spring (34); the sliding seat (33) is fixedly connected in the connecting sleeve (1); one end of the sliding rod (32) is fixedly connected to the clamping plate (31), and the other end is slidably connected to the sliding seat (33); the spring (34) is arranged in the sliding seat (33), and one end of the spring (34) abuts against the sliding seat (33), and the other end abuts against the sliding rod (32).

3. The seamless steel pipe for easy butt jointing according to claim 1, characterized in that: A buffer pad (21) is installed on the side of the threaded boss (2) away from the connecting sleeve (1).

4. The seamless steel pipe for easy butt jointing according to claim 1, characterized in that: A docking boss (101) is provided at one end of the steel pipe body (10) close to the threaded boss (2); and a sealing gasket (104) is installed on one side of the docking boss (101) away from the threaded boss (2).

5. The seamless steel pipe for easy butt jointing according to claim 1, characterized in that: A positioning groove (102) is provided at one end of the steel pipe body (10) close to the connecting sleeve (1), and a second sealing gasket (105) is installed in the positioning groove (102).

6. The seamless steel pipe for easy butt jointing according to claim 5, characterized in that: A positioning boss (103) is provided at one end of the steel pipe body (10) close to the threaded boss (2); when the two steel pipe bodies (10) are butt-jointed, the positioning boss (103) matches the positioning groove (102).

7. The seamless steel pipe for easy butt jointing according to claim 1, characterized in that: A limiting boss (106) is provided at one end of the steel pipe body (10) close to the connecting sleeve (1).

Images