High-cleanliness precision stainless steel pipe

Abstract

This utility model relates to the field of stainless steel pipe technology, and more particularly to a high-cleanliness precision stainless steel pipe. The technical solution includes a precision stainless steel pipe body and a plug. A heat-shrinkable film tube is provided on the outer surface of the precision stainless steel pipe body. The plug is located inside the precision stainless steel pipe body near its end. A groove is provided on the upper surface of the plug, and a threaded hole is provided at the bottom of the inner wall of the groove. A screw is inserted into the threaded hole, and a frustum-shaped column is connected to the bottom end of the screw. A sealing ring is installed on the lower surface of the plug, and a tapered inclined surface is provided on the inner wall of the sealing ring. This utility model can effectively prevent damage to the outer surface of the precision stainless steel pipe due to contact friction, and also effectively prevent dust, impurities, and rainwater from adhering to the outer surface and inner wall of the pipe, ensuring the high cleanliness of the pipe and facilitating subsequent use.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel pipe technology, specifically to a high-purity precision stainless steel pipe. Background Technology

[0002] Precision stainless steel tubes are high-performance tubing made from stainless steel materials through precision processing techniques such as cold drawing, cold rolling, and precision rolling, followed by precise heat treatment and surface polishing. Their core advantages lie in extremely high dimensional accuracy (outer diameter tolerance can be controlled within ±0.02mm, wall thickness tolerance can reach ±0.01mm), excellent surface finish (roughness Ra value is often below 0.8μm), and stable mechanical properties (combining high strength, corrosion resistance, and toughness). They can maintain structural stability and sealing performance under complex environments such as high temperature, low temperature, and acid / alkali corrosion. Due to these characteristics, precision stainless steel tubes are widely used in high-end manufacturing fields, such as infusion tubing and puncture needle assemblies in medical devices, hydraulic lines and fuel delivery systems in aerospace, high-purity gas delivery pipelines in the semiconductor industry, and in precision instruments and automotive braking systems—scenarios with stringent requirements for tubing precision and reliability. They are key basic components supporting the miniaturization and precision development of high-end equipment.

[0003] Currently, precision stainless steel pipes are prone to damage to their outer surface due to contact and friction during transportation and storage. At the same time, dust, impurities, and rainwater not only easily adhere to the outer surface but also penetrate the inner wall, causing contamination of the pipe and affecting its performance. Therefore, we propose a high-cleanliness precision stainless steel pipe. Utility Model Content

[0004] The purpose of this utility model is to provide a high-cleanliness precision stainless steel pipe that can effectively prevent damage to the outer surface of the precision stainless steel pipe due to contact friction, and also effectively prevent dust, impurities and rainwater from adhering to the outer surface and inner wall of the pipe, ensuring the high cleanliness of the pipe and facilitating subsequent use. It solves the problem that precision stainless steel pipes are easily damaged by contact friction during transportation and storage, and that dust, impurities and rainwater not only easily adhere to the outer surface but also penetrate the inner wall, thus causing pipe contamination and affecting its performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-cleanliness precision stainless steel tube, comprising a precision stainless steel tube body and a plug, wherein a heat-shrinkable film tube is provided on the outer surface of the precision stainless steel tube body, the plug is located inside the precision stainless steel tube body near the end position, a groove is provided on the upper surface of the plug, a threaded hole is provided at the bottom of the inner wall of the groove, a screw is inserted into the threaded hole, a frustum column is connected to the bottom end of the screw, a sealing ring is installed on the lower surface of the plug, and a tapered inclined surface is provided on the inner wall of the sealing ring.

[0006] Preferably, the screw end is connected to a knob, and the knob is located inside the groove.

[0007] Preferably, the upper surface of the block has a plurality of protrusions arranged in a ring array at equal intervals.

[0008] Preferably, a limiting ring is provided on the outer surface of the block near the upper surface, and the outer diameter of the limiting ring is larger than the inner diameter of the precision stainless steel tube body.

[0009] Preferably, a sealing gasket is installed on the lower surface of the limiting ring, and the main body of the precision stainless steel tube passes through the sealing gasket.

[0010] Preferably, the heat shrink film tube has a flange at its end, and the flange is located between the sealing gasket and the end of the precision stainless steel tube body.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model, by setting up a precision stainless steel tube body, heat shrinkable film tube, plug, groove, screw, threaded hole, frustum, sealing ring, and conical inclined surface, effectively avoids damage to the outer surface of the precision stainless steel tube due to contact friction. It also effectively prevents dust, impurities, and rainwater from adhering to the outer surface and inner wall of the tube, ensuring high cleanliness and facilitating subsequent use. The heat shrinkable film tube wraps around the outer surface of the precision stainless steel tube body, effectively preventing frictional damage caused by contact friction between the tube bodies during storage and transportation. It also effectively prevents dust, impurities, and rainwater from adhering to the outer surface of the precision stainless steel tube body. After inserting the plug into the interior of the precision stainless steel tube body near the end, turning the screw moves the frustum. The inclined surface around the frustum contacts the conical inclined surface of the sealing ring, forcing the sealing ring to expand outwards and contact the inner wall of the precision stainless steel tube body, thus fixing the plug and providing a seal, effectively preventing dust, impurities, and rainwater from entering the interior of the precision stainless steel tube body.

[0013] 2. By setting a limiting ring, this utility model can limit the position of the block, so that the block is located inside the precision stainless steel tube body near the end.

[0014] 3. By setting a sealing gasket, this utility model can seal the gap between the limiting ring and the top of the precision stainless steel tube body, effectively preventing rainwater from seeping into the interior of the precision stainless steel tube body through the gap. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2This is a three-dimensional sectional view of the present invention;

[0017] Figure 3 This is a partial three-dimensional cross-sectional view of the blocking block of this utility model;

[0018] Figure 4 This is a partial cross-sectional view of the main body of the precision stainless steel tube of this utility model.

[0019] Reference numerals: 1. Precision stainless steel tube body; 2. Heat shrinkable film tube; 3. Block; 4. Frustum; 5. Protrusion; 6. Groove; 7. Knob; 8. Threaded hole; 9. Screw; 10. Conical bevel; 11. Sealing ring; 12. Sealing gasket; 13. Limiting ring; 14. Flanged edge. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figures 1-4 As shown, this utility model proposes a high-cleanliness precision stainless steel tube, including a precision stainless steel tube body 1 and a plug 3. A heat-shrinkable film tube 2 is provided on the outer surface of the precision stainless steel tube body 1. The heat-shrinkable film tube 2 is fixed to the outer surface of the precision stainless steel tube body 1 by heat shrinking. When using the precision stainless steel tube body 1, the heat-shrinkable film tube 2 can be removed or retained, continuing to protect the precision stainless steel tube body 1. The plug 3 is located inside the precision stainless steel tube body 1 near the end position, and the upper surface of the plug 3 is provided with a concave shape. The bottom of the inner wall of the groove 6 is provided with a threaded hole 8, and a screw 9 is inserted into the threaded hole 8. The bottom end of the screw 9 is connected to a frustum 4, and the end of the screw 9 is connected to a knob 7, which is located inside the groove 6. A sealing ring 11 is installed on the lower surface of the block 3. A conical inclined surface 10 is provided on the inner wall of the sealing ring 11. The inclined surface around the frustum 4 contacts the conical inclined surface 10. Several protrusions 5 are arranged in a ring array at equal intervals on the upper surface of the block 3. The arrangement of the protrusions 5 makes the block 3 have a force point so that the block 3 can be fixed when the screw 9 rotates.

[0023] In this embodiment, the heat-shrinkable film tube 2 is wrapped around the outer surface of the precision stainless steel tube body 1, which can effectively prevent friction damage caused by contact friction between the precision stainless steel tube bodies 1 during the storage and transportation of the tube. It can also effectively prevent dust, impurities and rainwater from adhering to the outer surface of the precision stainless steel tube body 1. After the plug 3 is inserted into the interior of the precision stainless steel tube body 1 near the end, the screw 9 is turned to drive the frustum 4 to move. The inclined surface around the frustum 4 contacts the conical inclined surface 10 of the sealing ring 11, forcing the sealing ring 11 to expand and contact the inner wall of the precision stainless steel tube body 1, thus fixing the plug 3 and playing a sealing role, effectively preventing dust, impurities and rainwater from entering the interior of the precision stainless steel tube body 1.

[0024] Example 2

[0025] like Figures 1-4 As shown, the present invention proposes a high-cleanliness precision stainless steel tube. Compared with Embodiment 1, this embodiment further includes a limiting ring 13 provided on the outer surface of the plug 3 near the upper surface. The outer diameter of the limiting ring 13 is larger than the inner diameter of the precision stainless steel tube body 1, and the outer diameter of the limiting ring 13 is smaller than or equal to the outer diameter of the precision stainless steel tube body 1. A sealing gasket 12 is installed on the lower surface of the limiting ring 13, and the precision stainless steel tube body 1 passes through the sealing gasket 12. A flange 14 is provided at the end of the heat shrinkable tube 2, and the flange 14 is located between the sealing gasket 12 and the end of the precision stainless steel tube body 1.

[0026] In this embodiment, the limiting ring 13 limits the position of the block 3, so that the block 3 is located inside the precision stainless steel tube body 1 near the end. The limiting ring 13 also squeezes the sealing gasket 12 and the flange 14, which can better seal the tube and effectively prevent dust, impurities and rainwater from entering the interior of the precision stainless steel tube body 1 and between the heat shrinkable tube 2 and the precision stainless steel tube body 1.

[0027] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A high cleanliness precision stainless steel tube comprising a precision stainless steel tube body (1) and a plug (3), characterized in that: The outer surface of the precision stainless steel tube body (1) is provided with a heat shrinkable film tube (2). The plug (3) is located inside the precision stainless steel tube body (1) near the end. The upper surface of the plug (3) is provided with a groove (6). The bottom of the inner wall of the groove (6) is provided with a threaded hole (8). A screw (9) is inserted into the threaded hole (8). The bottom end of the screw (9) is connected to a frustum column (4). A sealing ring (11) is installed on the lower surface of the plug (3). The inner wall of the sealing ring (11) is provided with a conical inclined surface (10).

2. A high cleanliness precision stainless steel tube according to claim 1, characterized in that: The screw (9) is connected to a knob (7) at its end, and the knob (7) is located inside the groove (6).

3. A high cleanliness precision stainless steel tube according to claim 2, characterized in that: The upper surface of the block (3) is provided with a number of protrusions (5) arranged in a ring array at equal intervals.

4. A high cleanliness precision stainless steel tube as claimed in claim 1, characterized in that: A limiting ring (13) is provided on the outer surface of the block (3) near the upper surface, and the outer diameter of the limiting ring (13) is larger than the inner diameter of the precision stainless steel tube body (1).

5. A high cleanliness precision stainless steel tube according to claim 4, characterized in that: A sealing gasket (12) is installed on the lower surface of the limiting ring (13), and the precision stainless steel tube body (1) passes through the sealing gasket (12).

6. A high cleanliness precision stainless steel tube according to claim 5, characterized in that: The heat shrinkable tube (2) is provided with a flange (14) at its end, and the flange (14) is located between the sealing gasket (12) and the end of the precision stainless steel tube body (1).

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