A stainless steel seamless steel pipe
By introducing a mechanical self-locking structure consisting of a connecting sleeve, steel ball, hook foot, spring, and bolt into the stainless steel seamless pipe, combined with flexible gaskets and a specific coating, the problems of leakage, loosening, and precision during the connection of stainless steel seamless pipes are solved, achieving an efficient and stable connection effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU HAOTE METAL TECH CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-07
AI Technical Summary
Existing stainless steel seamless pipes are prone to leakage, loosening, sealing failure, or poor precision during connection. Traditional connection methods have poor stability under high pressure or high temperature environments and lack automatic locking function.
It adopts a mechanical self-locking structure consisting of a connecting sleeve, steel ball, hook foot, spring and bolt, combined with flexible gasket and specific coating, to achieve quick insertion, automatic locking and sealing connection, and enhance impact resistance and corrosion resistance.
It enables rapid and stable connection of seamless stainless steel pipes, reduces wear and leakage risks, improves connection accuracy and corrosion resistance, and is suitable for high-pressure and vibration environments.
Smart Images
Figure CN224469848U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of stainless steel seamless steel pipes, specifically a stainless steel seamless steel pipe. Background Technology
[0002] Stainless steel seamless pipe is a hollow steel section manufactured by piercing a single piece of steel billet. It has no seams, high strength, and good pressure resistance, and is widely used in petrochemical, hydraulic systems, food, and medical fields. The inner and outer surfaces of the pipe are free of creases, cracks, and welds.
[0003] In practical applications, connecting multiple sections of seamless stainless steel pipes presents a key challenge. Due to the pipe's unthreaded structure, which prevents direct welding, common methods for connecting seamless stainless steel pipes include external threaded interfaces, compression fittings, and U-shaped clips. While these methods are simple and quick to assemble, some problems still exist, such as:
[0004] External threaded connections require secondary threading of the seamless steel pipe end, which damages the integrity of the original structure and is prone to leakage or loosening under high pressure or high temperature environments;
[0005] Clamp-type ring connections are prone to slippage due to elastic fatigue or insufficient locking force, leading to seal failure.
[0006] When the angle of the traditional U-shaped buckle is not accurately adjusted, it is difficult to achieve high-precision docking;
[0007] Most connection structures lack automatic locking during installation and require manual tightening or adjustment.
[0008] Therefore, there is an urgent need for a seamless stainless steel pipe to solve the above-mentioned technical defects. Utility Model Content
[0009] The purpose of this utility model is to provide a seamless stainless steel pipe to solve the problems mentioned in the background art, such as easy leakage and loosening, sealing failure, or poor precision when steel pipes are joined.
[0010] To achieve the above objectives, this utility model provides the following technical solution: a seamless stainless steel pipe, including a connecting sleeve, with a set of pipe bodies on each side of the connecting sleeve. The side of the pipe body closest to the connecting sleeve is machined into a slope section, with a connecting port machined on the inner edge of the slope section and an arc groove machined on the outer edge of the slope section. A step is machined on the inner wall of the arc groove at the corresponding position. A hook foot is machined inside the connecting sleeve, and a spring groove is machined on the inner wall at the position of the hook foot. A spring is fixed in the spring groove, and a slider is welded to the end of the spring. A steel ball is embedded in the end of the slider, and the steel ball is movably assembled in the spring groove.
[0011] As a further technical solution of this utility model, the arc of the groove matches the steel ball, and the shape of the step matches the hook foot.
[0012] As a further technical solution of this utility model, a ring is sleeved at the middle position of the outer side of the connecting sleeve, and a bolt is installed on the outside of the ring. The ring, the connecting sleeve and the connecting port are locked together by the bolt.
[0013] As a further technical solution of this utility model, flexible gaskets are glued to both the end of the hook foot near the steel ball and the end that fits the connection port.
[0014] As a further technical solution of this utility model, the spring groove has an outward convex structure, and multiple sets of steel balls are distributed in a ring inside the spring groove.
[0015] As a further technical solution of this utility model, the connecting port, the connecting sleeve and the outer wall of the ring are all machined with four sets of screw holes.
[0016] As a further technical solution of this utility model, the outer wall of the tube is coated with an outer coating material, which is PFA perfluoroalkoxy material.
[0017] As a further technical solution of this utility model, the inner wall of the tube is coated with an inner coating material, which is epoxy resin material.
[0018] Compared with the prior art, the beneficial effects of this utility model are: by setting up a pipe body, connecting sleeve, connecting port, step, steel ball, spring, arc groove, hook foot, bolt and ring, the stainless steel seamless pipe uses the connecting sleeve as the docking medium, combined with the mechanical self-locking structure of steel ball and step, to realize the quick insertion, automatic locking and sealing connection of two pipe sections, which is not easy to loosen or fall off.
[0019] By incorporating hook feet, flexible pads, and connectors, the impact resistance and buffering capacity of the fastening structure are improved, preventing wear and wobbling that could affect locking stability during periods of high water pressure or vibration.
[0020] By incorporating both an outer and inner coating, the pipe's corrosion resistance is enhanced, internal fluid resistance and wear are reduced, and pipeline transportation efficiency and long-term stable use are ensured. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the connection structure of this utility model;
[0022] Figure 2 This is a front view structural diagram of the present utility model;
[0023] Figure 3 For the present utility model Figure 1 Enlarged structural diagram of point A in the middle;
[0024] Figure 4 This is a side view sectional diagram of the tube body of this utility model.
[0025] In the diagram: 1. Pipe body; 2. Slope section; 3. Arc groove; 4. Step; 5. Connection port; 6. Bolt; 7. Ring clamp; 8. Hook foot; 9. Spring groove; 10. Spring; 11. Steel ball; 12. Connecting sleeve; 13. Sliding plate; 14. Flexible gasket; 15. Outer coating; 16. Inner coating. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figure 1-4 An embodiment of this utility model is provided: a stainless steel seamless pipe, including a connecting sleeve 12, a set of pipe bodies 1 on each side of the connecting sleeve 12, the side of the pipe body 1 near the connecting sleeve 12 is processed into a slope section 2, the inner edge of the slope section 2 is processed with a connection port 5, the outer edge of the slope section 2 is processed with an arc groove 3, the inner wall of the corresponding position of the arc groove 3 is processed with a step 4, the connecting sleeve 12 is processed with a hook foot 8, the inner wall of the position where the hook foot 8 is located is processed with a spring groove 9, a spring 10 is fixed in the spring groove 9, the end of the spring 10 is welded with a sliding piece 13, the end of the sliding piece 13 is embedded with a steel ball 11, the steel ball 11 is movably assembled in the spring groove 9, a ring 7 is sleeved at the middle position of the outside of the connecting sleeve 12, a bolt 6 is installed on the outside of the ring 7, the ring 7, the connecting sleeve 12 and the connection port 5 are locked together by the bolt 6, and the outer walls of the connection port 5, the connecting sleeve 12 and the ring 7 are all processed with four sets of screw holes;
[0028] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the two sets of tubes 1 are connected by connecting sleeves 12. The connecting port 5 of the tube 1 is aligned with the connecting sleeve 12 and inserted. When the tube 1 is pushed into the connecting sleeve 12, the step 4 on it will first contact the steel ball 11 and apply a pushing force. The steel ball 11 is forced into the spring groove 9, thereby compressing the spring 10. When the step 4 continues to be pushed beyond the steel ball 11, the steel ball 11 is embedded in the arc groove 3 under the rebound action of the spring 10, and the step 4 is accurately locked into the hook foot 8, thereby achieving a quick self-locking connection. Then, the bolt 6 is used in the middle of the connecting sleeve 12 to lock the ring 7, the connecting sleeve 12 and the tube 1, so that the tube 1 is firmly fixed in the connecting sleeve 12, completing the sealed connection of the two sets of tubes 1, and it is not easy to loosen or fall off.
[0029] The arc of the groove 3 matches the steel ball 11, the shape of the step 4 matches the hook foot 8, and the hook foot 8 is attached to a flexible pad 14 at one end near the steel ball 11 and at the other end of the connecting port 5. The spring groove 9 has an outward convex structure, and the steel ball 11 is distributed in multiple sets in a ring inside the spring groove 9.
[0030] Specifically, such as Figure 1 and Figure 3 As shown, flexible pads 14 are glued to both the end of the hook foot 8 near the steel ball 11 and the end that fits into the connection port 5. This provides moderate flexibility and buffering when the connection port 5 is inserted into the hook foot 8, reducing wear caused by direct friction and hard-on-hard contact between rigid parts. It is especially suitable for use when there is a large water pressure impact or vibration, and can avoid wear and shaking that affects the locking stability.
[0031] The outer wall of the tube body 1 is coated with an outer coating 15, which is a PFA perfluoroalkoxy material, and the inner wall of the tube body 1 is coated with an inner coating 16, which is an epoxy resin material.
[0032] Specifically, such as Figure 1 and Figure 4 As shown, the outer wall of the pipe body 1 is coated with an outer coating 15, which is made of PFA material. It has excellent acid and alkali resistance and high temperature resistance, and can effectively protect the outer surface of the pipe body 1 from corrosion in harsh environments. At the same time, the inner wall of the pipe body 1 is coated with an inner coating 16, which is made of epoxy resin material. It has good fluid lubrication and anti-rust ability, and can reduce the resistance of internal fluid and wear on the pipe.
[0033] Working principle: When two pipe sections 1 need to be connected, the operator aligns the connector 5 at one end with the connector sleeve 12 and inserts it. During insertion, the ramp 2 enters, and the step 4 first contacts the steel ball 11, pushing the steel ball 11 outward and forcing it to compress the spring 10, which is located in the spring groove 9. After the spring 10 is compressed, the steel ball 11 makes way, allowing the step 4 to continue to advance. After the step 4 passes the steel ball 11, the spring 10 instantly releases its rebound force, causing the steel ball 11 to automatically lock into the arc groove 3, forming a limit. The step 4 and the hook foot 8 fit together and engage, thus completing the self-locking insertion of the pipe section 1. To avoid rigid collisions causing the steel ball 11 to shake or become inaccurately locked, flexible gaskets 1 are provided at both ends of the hook foot 8. 4. Provides buffer support for the connection port 5, which helps to complete the insertion and alignment process smoothly and prevents the connection part from fretting or wear due to the impact of high pressure fluid. Subsequently, a ring clamp 7 is installed in the middle area of the connecting sleeve 12 and locked with bolts 6. The bolts 6 pass through the screw holes on the outer wall of the connecting sleeve 12, the pipe body 1 and the connection port 5 to ensure that the connection is not loose. The ring clamp 7 plays a structural binding role and further enhances the overall rigidity and stability. The outer wall of the entire pipe body 1 is coated with an outer coating 15 of PFA material, which has acid and alkali resistance and high temperature resistance, and can ensure the service life of the steel pipe in outdoor or chemical environments. The inner wall is coated with an inner coating 16 of epoxy resin material, which improves the smoothness of fluid transportation and reduces the risk of inner wall corrosion.
[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A seamless stainless steel pipe, comprising a connecting sleeve (12), characterized in that: A set of tubes (1) is provided on each side of the connecting sleeve (12). The side of the tube (1) closest to the connecting sleeve (12) is processed into a slope section (2). A connection port (5) is processed on the inner edge of the slope section (2). An arc groove (3) is processed on the outer edge of the slope section (2). A step (4) is processed on the inner wall of the corresponding position of the arc groove (3). A hook foot (8) is processed inside the connecting sleeve (12). A spring groove (9) is processed on the inner wall of the position where the hook foot (8) is located. A spring (10) is fixed inside the spring groove (9). A slider (13) is welded to the end of the spring (10). A steel ball (11) is embedded at the end of the slider (13). The steel ball (11) is movably assembled in the spring groove (9).
2. The stainless steel seamless pipe according to claim 1, characterized in that: The arc of the groove (3) matches the arc of the steel ball (11), and the shape of the step (4) matches the shape of the hook foot (8).
3. The stainless steel seamless pipe according to claim 1, characterized in that: A ring (7) is fitted around the middle of the outside of the connecting sleeve (12), and a bolt (6) is installed on the outside of the ring (7). The ring (7), the connecting sleeve (12) and the connecting port (5) are locked together by the bolt (6).
4. A seamless stainless steel pipe according to claim 1, characterized in that: Flexible gaskets (14) are attached to both the end of the hook (8) near the steel ball (11) and the end that fits the connection port (5).
5. A seamless stainless steel pipe according to claim 1, characterized in that: The spring groove (9) has an outward convex structure, and the steel balls (11) are distributed in multiple sets in a ring inside the spring groove (9).
6. A seamless stainless steel pipe according to claim 1, characterized in that: The outer walls of the connecting port (5), connecting sleeve (12) and ring hoop (7) are all machined with four sets of screw holes.
7. A seamless stainless steel pipe according to claim 1, characterized in that: The outer wall of the tube (1) is coated with an outer coating (15), which is a PFA perfluoroalkoxy material.
8. A seamless stainless steel pipe according to claim 1, characterized in that: The inner wall of the tube (1) is coated with an inner coating (16), which is an epoxy resin material.