High-strength stainless steel seamless steel pipe

Abstract

The utility model discloses a high-strength stainless steel seamless steel pipe which comprises a steel pipe body, a spring is arranged in the steel pipe body, an air pressure cavity is fixedly installed on the inner wall of the steel pipe body, and a transmission rod is arranged in the steel pipe body. When one ends of the two steel pipe bodies collide with each other, the buffering bag firstly collides with each other, the buffering bag can buffer a part of impact force under the action of internal air pressure due to the fact that the interior of the buffering bag is sealed and hollow, then the remaining impact force is transmitted to the transmission rod, and the transmission rod moves inwards to impact the air pressure cavity. Due to the fact that the air pressure cavity can buffer the remaining impact force through the high-pressure gas and the spring and release the impact force which is not buffered into the steel pipe body, damage to the two ends of the steel pipe body due to collision is reduced, and the problem that paint on the surface of the seamless steel pipe falls off or the two ends are abraded or broken due to long-time collision is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of seamless steel pipes, and particularly relates to a high-strength stainless steel seamless steel pipe. Background Technique

[0002] A seamless steel pipe is a hollow steel product, which is named seamless steel pipe because there is no weld seam throughout the steel pipe. The production process of seamless steel pipes usually includes heating and softening a solid steel billet, then extruding it into a blank through a rolling mill or an extruder, and finally forming the required seamless steel pipe through multiple passes of stretching and straightening. Such steel pipes are divided into various types according to their uses, such as seamless steel pipes for structural use, seamless steel pipes for fluid transportation, seamless steel pipes for low and medium pressure boilers, etc. Their specifications are usually expressed by the outer diameter and wall thickness, and their uses and properties also vary according to the different materials.

[0003] In construction projects, seamless steel pipes are commonly used in building frames, support structures, and drainage systems. Due to their high strength and stability, they can bear a large amount of weight and pressure, while providing structural stability. In addition, in bridge construction, seamless steel pipes also play an important role, mainly used in parts such as bridge piers, arch rings, and stay cables. Their high strength, high stiffness, corrosion resistance, etc. can ensure the safety and durability of the bridge.

[0004] However, during the transportation of seamless steel pipes, when the semi-trailer carrying them brakes quickly or starts up relatively fast, it is easy for one end of a seamless steel pipe to collide with one end of another seamless steel pipe. Prolonged collisions are likely to cause the paint on the surface of the seamless steel pipe to fall off, or wear or breakage to occur at both ends. To solve this technical problem, the utility model proposes a high-strength stainless steel seamless steel pipe. Content of the Utility Model

[0005] The main purpose of the utility model is to provide a high-strength stainless steel seamless steel pipe, which can effectively solve the problems mentioned in the background technique.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A high-strength stainless steel seamless steel pipe includes a steel pipe body. A spring is arranged inside the steel pipe body. An air pressure chamber is fixedly installed on the inner wall of the steel pipe body. A transmission rod is arranged inside the steel pipe body. Buffer bags are arranged outside both ends of the steel pipe body.

[0008] Preferably, a reserved cavity is formed inside the steel pipe body. Sliding sleeves are fixedly installed on the inner wall of the steel pipe body and the outer surface of the reserved cavity. The inner wall of the sliding sleeve is slidably connected to the outer surface of the transmission rod.

[0009] Preferably, the outer surface of the buffer bladder is detachably installed with one end of the transmission rod. An air chamber is provided inside the buffer bladder. A straight grain section is provided on the inner side of the buffer bladder. Several ventilation holes are provided on the inner side of the sliding sleeve.

[0010] Preferably, a limiting ring is fixedly installed on the inner wall of the steel pipe body. A limiting flange is fixedly installed on the outer surface of the transmission rod. The outer surface of the limiting flange is slidably connected to the inner wall of the steel pipe body. Several slots are provided on the inner side of the limiting flange. The outer surface of the limiting flange is in contact with and closely adheres to the outer surface of the limiting ring. A gap is reserved between the inner wall of the limiting flange and the outer surface of the transmission rod.

[0011] Preferably, the outer surface of the transmission rod is slidably connected to the inner wall of the air pressure chamber. The interior of the air pressure chamber below the transmission rod is filled with high-pressure gas.

[0012] Preferably, the spring is sleeved on the outer surface of the transmission rod. The top end of the spring is fixedly installed on the outer surface of the limiting flange. The other end of the spring is fixedly installed on the outer surface of the air pressure chamber.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, through the cooperation among the steel pipe body, the spring, the air pressure chamber, the transmission rod and the buffer bladder, when the mutual ends of the two steel pipe bodies collide with each other, the first to collide is the buffer bladder. Since the interior of the buffer bladder is a sealed hollow, the buffer bladder can buffer a part of the impact force under the action of the internal air pressure, and then transfer the remaining impact force to the transmission rod. The transmission rod will move inward and impact the air pressure chamber. Since the air pressure chamber can buffer the remaining impact force by relying on the high-pressure gas and the spring and release the unbuffered impact force to the inside of the steel pipe body, the breakage of the two ends of the steel pipe body caused by the impact is reduced, and the problem that the paint on the surface of the seamless steel pipe is likely to fall off or wear or break at both ends due to long-term collision is solved.

[0015] In the utility model, through the cooperation among the limiting ring, the limiting flange, the slots and the transmission rod, the transmission rod can drive the limiting flange during movement. The slots provided on the inner side of the limiting flange can ensure that when the limiting flange moves inward, the air can flow out through the slots under extrusion, so as to prevent the deformation of the inside of the steel pipe body due to the high air pressure generated in a short time. The limiting ring can provide the function of the highest limit for the limiting flange to prevent the transmission rod from falling off the steel pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of a high-strength stainless steel seamless steel pipe of the utility model;

[0017] Figure 2 Schematic diagram of the overall internal structure of a high-strength stainless steel seamless steel pipe of the present utility model;

[0018] Figure 3 Schematic diagram of the partial structure of the steel pipe body of a high-strength stainless steel seamless steel pipe of the present utility model;

[0019] Figure 4 Schematic diagram of the overall explosion structure of a high-strength stainless steel seamless steel pipe of the present utility model;

[0020] Figure 5 Schematic diagram of the cross-sectional structure of the buffer bag of a high-strength stainless steel seamless steel pipe of the present utility model.

[0021] In the figure: 1. Steel pipe body; 2. Spring; 3. Air pressure chamber; 4. Transmission rod; 5. Buffer bag; 6. Reserved cavity; 7. Sliding sleeve; 8. Air cavity; 9. Vent hole; 10. Limit ring; 11. Limit flange; 12. Groove. Specific implementation manner

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation manners.

[0023] As Figures 1-5 shown, a high-strength stainless steel seamless steel pipe includes a steel pipe body 1. A spring 2 is arranged inside the steel pipe body 1. An air pressure chamber 3 is fixedly installed on the inner wall of the steel pipe body 1. A transmission rod 4 is arranged inside the steel pipe body 1. Buffer bags 5 are arranged outside both ends of the steel pipe body 1. When the mutually opposite ends of two steel pipe bodies 1 collide with each other, the first to collide with each other is the buffer bag 5. Since the inside of the buffer bag 5 is a sealed hollow, the buffer bag 5 can buffer part of the impact force under the action of the internal air pressure, and then transmit the remaining impact force to the transmission rod 4. The transmission rod 4 will move inward and impact the air pressure chamber 3. Since the air pressure chamber 3 can buffer the remaining impact force by relying on high-pressure gas and the spring 2 and release the unbuffered impact force to the inside of the steel pipe body 1, the damage of the two ends of the steel pipe body 1 due to impact is reduced, and the problem that the paint on the surface of the seamless steel pipe is likely to fall off or wear or break at both ends due to long-term collision is solved.

[0024] A reserved cavity 6 is opened on the inner side of the steel pipe body 1. Sliding sleeves 7 are fixedly installed on the inner wall of the steel pipe body 1 and the outer surface of the reserved cavity 6. The inner wall of the sliding sleeve 7 is slidably connected with the outer surface of the transmission rod 4. The reserved cavity 6 can prevent the sliding sleeve 7 from loosening and shifting. The sliding sleeve 7 can ensure that the transmission rod 4 always remains at the center of the steel pipe body 1 during movement, so that when the transmission rod 4 is impacted in other directions, it still will not tilt, shift or be misaligned.

[0025] The outer surface of the buffer bladder 5 and one end of the transmission rod 4 are detachably installed. An air chamber 8 is provided inside the buffer bladder 5, and a straight-grained section is provided on the inner side of the buffer bladder 5. Several ventilation holes 9 are provided on the inner side of the sliding sleeve 7. The straight-grained section designed on the inner side of the buffer bladder 5 enables the buffer bladder 5 to contract inward when impacted to buffer part of the kinetic energy. The air chamber 8 inside the buffer bladder 5 is filled with air pressure equal to the external atmospheric pressure, and the buffer bladder 5 can be detached from the transmission rod 4, so that the buffer bladder 5 can buffer the collision at both ends of the steel pipe during transportation or storage and can be directly detached during construction, enabling the steel pipe body 1 to be used normally. The ventilation holes 9 on the sliding sleeve 7 can ensure the circulation of air inside the steel pipe body 1, so that when the transmission rod 4 moves, the normal circulation of air is maintained.

[0026] A limiting ring 10 is fixedly installed on the inner wall of the steel pipe body 1. A limiting flange 11 is fixedly installed on the outer surface of the transmission rod 4. The outer surface of the limiting flange 11 is slidably connected to the inner wall of the steel pipe body 1. Several slots 12 are provided on the inner side of the limiting flange 11. The outer surface of the limiting flange 11 is in contact with the outer surface of the limiting ring 10. A gap is reserved between the inner wall of the limiting flange 11 and the outer surface of the transmission rod 4. The transmission rod 4 can drive the limiting flange 11 during movement. The slots 12 provided on the inner side of the limiting flange 11 can ensure that when the limiting flange 11 moves inward, the air can be extruded and flow out through the slots 12 to prevent the steel pipe body 1 from deforming due to the high air pressure generated in a short time. The limiting ring 10 can provide the function of the highest limit for the limiting flange 11 to prevent the transmission rod 4 from falling off from the steel pipe body 1.

[0027] The outer surface of the transmission rod 4 is slidably connected to the inner wall of the air pressure chamber 3. The inside of the air pressure chamber 3 below the transmission rod 4 is filled with high-pressure gas. When the buffer bladder 5 fails to buffer all the impact forces, it will push the transmission rod 4 to move inside the air pressure chamber 3. The high-pressure gas inside the air pressure chamber 3 can buffer the remaining impact forces. After the impact forces are buffered, the high-pressure gas can push the transmission rod 4 to return to its original position.

[0028] A spring 2 is sleeved on the outer surface of the transmission rod 4. The top end of the spring 2 is fixedly installed on the outer surface of the limiting flange 11, and the other end of the spring 2 is fixedly installed on the outer surface of the air pressure chamber 3. The spring 2 can always push the limiting flange 11 with the air pressure chamber 3 as a fixed point, so that when the transmission rod 4 moves inward, it can assist the high-pressure gas to buffer part of the impact force and can push the limiting flange 11 and the transmission rod 4 to quickly return to their original positions.

[0029] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments. What is described in the above-mentioned embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-strength stainless steel seamless pipe, characterized in that: The invention comprises a steel pipe body (1), a spring (2) is arranged inside the steel pipe body (1), a pneumatic chamber (3) is fixedly installed on the inner wall of the steel pipe body (1), a transmission rod (4) is arranged inside the steel pipe body (1), and buffer bags (5) are arranged outside the two ends of the steel pipe body (1).

2. The high-strength stainless steel seamless pipe according to claim 1, characterized in that: A reserved cavity (6) is provided on the inner side of the steel pipe body (1), and a sliding sleeve (7) is fixedly mounted on the inner wall of the steel pipe body (1) and the outer surface of the reserved cavity (6), and the inner wall of the sliding sleeve (7) is slidably connected to the outer surface of the transmission rod (4).

3. A high-strength stainless steel seamless pipe according to claim 2, characterized in that: The outer surface of the buffer bag (5) and one end of the transmission rod (4) are detachably mounted, an air cavity (8) is provided inside the buffer bag (5), a straight-line section is provided on the inner side of the buffer bag (5), and a plurality of ventilation holes (9) are provided on the inner side of the sliding sleeve (7).

4. The high-strength stainless steel seamless pipe according to claim 1, characterized in that: A limiting ring (10) is fixedly mounted on the inner wall of the steel pipe body (1), and a limiting flange (11) is fixedly mounted on the outer surface of the transmission rod (4). The outer surface of the limiting flange (11) is slidably connected to the inner wall of the steel pipe body (1). A plurality of grooves (12) are provided on the inner side of the limiting flange (11). The outer surface of the limiting flange (11) is in close contact with the outer surface of the limiting ring (10), and a gap is reserved between the inner wall of the limiting flange (11) and the outer surface of the transmission rod (4).

5. The high-strength stainless steel seamless pipe according to claim 3, characterized in that: The outer surface of the transmission rod (4) is slidably connected to the inner wall of the air pressure chamber (3); the interior of the air pressure chamber (3) located below the transmission rod (4) is filled with high-pressure gas.

6. The high-strength stainless steel seamless pipe according to claim 4, characterized in that: The spring (2) is sleeved on the outer surface of the transmission rod (4), the top end of the spring (2) is fixedly mounted on the outer surface of the limiting flange (11), and the other end of the spring (2) is fixedly mounted on the outer surface of the air pressure chamber (3).

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