Corrosion-resistant thin-wall composite stainless steel pipe

Abstract

The utility model discloses a corrosion-resistant thin-wall composite stainless steel pipe which comprises a steel pipe body, an inner corrosion-resistant sleeve, an outer corrosion-resistant sleeve and two end caps, the two ends of the steel pipe body are respectively provided with a protruding ring, a protruding ring and a plurality of protruding strips which correspond to each other, and the inner corrosion-resistant sleeve is inserted into the steel pipe body and limited in the steel pipe body through a limiting ring with an opening. Clamping rings corresponding to the inner corrosion-resistant sleeve are arranged at the inner ends of the end caps, grooves corresponding to the convex rings are formed in the end caps, groove bodies corresponding to the convex strips are further formed in the end caps on the inner sides of the grooves, limiting grooves corresponding to the outer corrosion-resistant sleeve are further formed in the end caps on the outer sides of the grooves, the two end caps are clamped to the ends of the steel pipe body respectively, and the two clamping rings are clamped into the ends of the inner corrosion-resistant sleeve. And the outer corrosion-resistant sleeve is sleeved outside the steel pipe main body, and two ends of the outer corrosion-resistant sleeve are respectively propped into the limiting grooves of the corresponding end caps. According to the utility model, the inner corrosion-resistant sleeve and the outer corrosion-resistant sleeve can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to a corrosion-resistant thin-walled composite stainless steel pipe. Background Technology

[0002] In the existing technology, corrosion-resistant thin-walled composite stainless steel pipes generally include a steel pipe body, an inner corrosion-resistant sleeve set inside the steel pipe body, and an outer corrosion-resistant sleeve set outside the steel pipe body. The inner and outer corrosion-resistant sleeves are generally glued to the inside and outside of the steel pipe body. When the inner or outer corrosion-resistant sleeve is damaged, it is difficult to disassemble and replace it, and the entire steel pipe must be scrapped. Even if a small number of split composite stainless steel pipes appear, the connection method between the inner and outer corrosion-resistant sleeves and the steel pipe body is extremely complicated, and the same disadvantage of being difficult to disassemble and replace is present. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a corrosion-resistant thin-walled composite stainless steel pipe that allows for easy replacement of the inner and outer corrosion-resistant sleeves.

[0004] The technical solution of this utility model is: a corrosion-resistant thin-walled composite stainless steel pipe, including a steel pipe body, an inner corrosion-resistant sleeve disposed inside the steel pipe body, an outer corrosion-resistant sleeve disposed outside the steel pipe body, and caps at both ends. The outer sides of both ends of the steel pipe body are respectively provided with convex rings, and the inner sides of both ends of the steel pipe body are respectively provided with concave rings corresponding to the convex rings. The ends of the steel pipe body outside the convex rings are respectively provided with multiple convex strips.

[0005] The inner corrosion-resistant sleeve has corresponding retaining rings at both ends, and the inner side of the inner corrosion-resistant sleeve also has a retaining groove corresponding to each retaining ring. The inner corrosion-resistant sleeve is inserted into the steel pipe body, and each retaining ring is engaged in the corresponding concave ring. Each retaining groove is also provided with a limiting ring with an opening, and the opening of each limiting ring is filled with waterproof glue.

[0006] An abutment ring is also provided inside the end of the inner corrosion-resistant sleeve on the outer side of the card slot;

[0007] The end cap has a snap ring corresponding to the inner corrosion-resistant sleeve at its inner end, a groove corresponding to the convex ring inside the end cap, a groove corresponding to each convex strip inside the end cap inside the groove, and a limiting groove corresponding to the outer corrosion-resistant sleeve inside the end cap outside the groove.

[0008] The two end caps are respectively snapped onto the ends of the steel pipe body, the two snap-in rings are snapped into the ends of the inner corrosion-resistant sleeve and respectively abut against the abutment ring, and the outer corrosion-resistant sleeve is placed on the outside of the steel pipe body and its two ends abut into the limiting grooves of the corresponding end caps.

[0009] Preferably, the outer sides of both ends of the steel pipe body are each provided with two convex rings, and the inner sides of both ends of the steel pipe body are each provided with two concave rings.

[0010] Specifically, the convex strip is trapezoidal in shape.

[0011] Specifically, the cross-section of the limiting ring protruding from the inner corrosion-resistant sleeve is trapezoidal.

[0012] Specifically, the cross-section of the abutment ring is a right trapezoidal shape.

[0013] Specifically, the outer side of the end cap also has external threads.

[0014] Specifically, the outer corrosion-resistant sleeve also has anti-slip textures on its surface.

[0015] The beneficial effects of this utility model are as follows: the two ends of the inner corrosion-resistant sleeve are limited by the limiting ring and the end cap, and the two end caps are respectively snapped into the two ends of the steel pipe body. Since the groove inside the end cap matches the groove, the end cap cannot rotate on its own. The steel pipe can be connected by the connector. The two ends of the outer corrosion-resistant sleeve are respectively inserted into the limiting groove of the corresponding end cap. Therefore, when the inner corrosion-resistant sleeve or the outer corrosion-resistant sleeve is damaged, the inner corrosion-resistant sleeve or the outer corrosion-resistant sleeve can be replaced by disassembling the end cap. In addition, the above structure also has the advantage that the inner corrosion-resistant sleeve and the outer corrosion-resistant sleeve are relatively easy to insert. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention;

[0017] Figure 2 yes Figure 1 Enlarged view of section A in the middle;

[0018] Figure 3 This is a schematic diagram of the structure of the end of the steel pipe body in this utility model.

[0019] In the diagram: 1. Steel pipe body; 2. Inner corrosion-resistant sleeve; 3. Outer corrosion-resistant sleeve; 4. End cap; 5. Convex ring; 6. Convex strip; 7. Snap ring; 8. Snap groove; 9. Limiting ring; 10. Waterproof adhesive; 11. Abutment ring; 12. Snap-in ring; 13. Groove; 14. Limiting groove; 15. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0021] Combination Figure 1-3 As shown, the corrosion-resistant thin-walled composite stainless steel pipe includes a steel pipe body 1, an inner corrosion-resistant sleeve 2 disposed inside the steel pipe body 1, an outer corrosion-resistant sleeve 3 disposed outside the steel pipe body 1, and caps at both ends 4.

[0022] The outer sides of both ends of the steel pipe body 1 are respectively provided with convex rings 5, the inner sides of both ends of the steel pipe body 1 are respectively provided with concave rings 6 corresponding to the convex rings 5, and the ends of the steel pipe body 1 outside the convex rings 5 ​​are respectively provided with multiple convex strips 7.

[0023] The inner corrosion-resistant sleeve 2 has retaining rings 8 corresponding to the concave rings 6 at both ends. The inner side of the inner corrosion-resistant sleeve 2 also has retaining grooves 9 corresponding to each retaining ring 8. The inner corrosion-resistant sleeve 2 is inserted into the steel pipe body 1. Each retaining ring 8 is engaged in the corresponding concave ring 6. Each retaining groove 9 is also provided with a limiting ring 10 with an opening. The opening of each limiting ring 10 is filled with waterproof adhesive 11. The limiting ring 10 limits the inner corrosion-resistant sleeve 2 to prevent the inner corrosion-resistant sleeve 2 from coming out of the steel pipe body 1. The waterproof adhesive 11 seals the limiting ring 10 to prevent the limiting ring 10 from coming out of the retaining groove 9.

[0024] An abutment ring 12 is also provided inside the end of the inner corrosion-resistant sleeve 2 on the outer side of the slot 9;

[0025] The end cap 4 has a snap ring 13 corresponding to the inner corrosion-resistant sleeve 2 at its inner end. The end cap 4 has a groove 14 corresponding to the convex ring 5. The end cap 4 inside the groove 14 also has a groove corresponding to each convex strip 7. The end cap 4 outside the groove 14 also has a limiting groove 15 corresponding to the outer corrosion-resistant sleeve 3.

[0026] The two end caps 4 are respectively snapped onto the ends of the steel pipe body 1. The two snap-in rings 13 are snapped into the ends of the inner corrosion-resistant sleeve 2 and respectively abut against the abutment ring 12 to further limit the inner corrosion-resistant sleeve 2. The outer corrosion-resistant sleeve 3 is placed on the outside of the steel pipe body 1 and its two ends abut into the limiting grooves 15 of the corresponding end caps 4.

[0027] In the above structure, the inner corrosion-resistant sleeve 2 is limited at both ends by the limiting ring 10 and the end cap 4. The end caps 4 are respectively snapped into the two ends of the steel pipe body 1. Since the groove inside the end cap 4 matches the groove 14, the end cap 4 cannot rotate on its own. The steel pipe can be connected by the connector. The two ends of the outer corrosion-resistant sleeve 3 are respectively inserted into the limiting groove 15 of the corresponding end cap 4. Therefore, when the inner corrosion-resistant sleeve 2 or the outer corrosion-resistant sleeve 3 is damaged, the inner corrosion-resistant sleeve 2 or the outer corrosion-resistant sleeve 3 can be replaced by disassembling the end cap 4 (or directly destroying the end cap 4). In addition, the above structure also has the advantage that the inner corrosion-resistant sleeve 2 and the outer corrosion-resistant sleeve 3 are relatively easy to insert.

[0028] Preferred, such as Figure 1 As shown, the outer sides of both ends of the steel pipe body 1 have two convex rings 5, and the inner sides of both ends of the steel pipe body 1 have two concave rings 6.

[0029] Specifically, the inner corrosion-resistant sleeve 2 is a PET sleeve, which has a certain degree of elasticity, so that the inner corrosion-resistant sleeve 2 can be inserted into the steel pipe body 1. The outer corrosion-resistant sleeve 3 is a PVC sleeve, which is harder and also provides a certain degree of protection for the outer wall of the steel pipe body 1.

[0030] In another embodiment, such as Figure 2 As shown, the protrusion 7 is trapezoidal in shape to facilitate the insertion of the end cap 4.

[0031] Specifically, the end cap 4 is an integrally molded structure of engineering plastic.

[0032] In another embodiment, such as Figure 2 As shown, the limiting ring 10 protrudes from the inner corrosion-resistant sleeve 2 and has a trapezoidal cross-section to reduce the impact of the medium on the limiting ring 10 when the medium is transported through the steel pipe.

[0033] In another embodiment, such as Figure 2 As shown, the cross-section of the abutment ring 12 is a right-angled trapezoid shape to ensure the reliability of the abutment ring 12 and reduce the impact of the medium on the end cap 4 when the medium is transported through the steel pipe.

[0034] In another embodiment, the end cap 4 also has external threads on its outer side.

[0035] In another embodiment, the outer corrosion-resistant sleeve 3 is also provided with anti-slip texture.

Claims

1. Corrosion-resistant thin-walled composite stainless steel pipe, characterized in that: The steel pipe body (1) includes an inner corrosion-resistant sleeve (2) inside the steel pipe body (1), an outer corrosion-resistant sleeve (3) outside the steel pipe body (1), and caps (4) at both ends. The outer sides of both ends of the steel pipe body (1) are respectively provided with convex rings (5), and the inner sides of both ends of the steel pipe body (1) are respectively provided with concave rings (6) corresponding to the convex rings (5). The ends of the steel pipe body (1) outside the convex rings (5) are respectively provided with multiple convex strips (7). The inner corrosion-resistant sleeve (2) has a retaining ring (8) corresponding to the concave ring (6) at both ends. The inner side of the inner corrosion-resistant sleeve (2) also has a groove (9) corresponding to each retaining ring (8). The inner corrosion-resistant sleeve (2) is inserted into the steel pipe body (1). Each retaining ring (8) is inserted into the corresponding concave ring (6). Each groove (9) is also provided with a limiting ring (10) with an opening. The opening of each limiting ring (10) is also filled with waterproof glue (11). An abutment ring (12) is also provided inside the end of the inner corrosion-resistant sleeve (2) on the outside of the slot (9); The end cap (4) has a snap ring (13) corresponding to the inner corrosion-resistant sleeve (2) at its inner end. The end cap (4) has a groove (14) corresponding to the convex ring (5) inside. The end cap (4) inside the groove (14) also has a groove corresponding to each convex strip (7). The end cap (4) outside the groove (14) also has a limiting groove (15) corresponding to the outer corrosion-resistant sleeve (3). The two end caps (4) are respectively snapped onto the ends of the steel pipe body (1), the two snap-in rings (13) are snapped into the ends of the inner corrosion-resistant sleeve (2) and respectively abut against the abutment ring (12), and the outer corrosion-resistant sleeve (3) is placed outside the steel pipe body (1) and its two ends abut against the limiting grooves (15) of the corresponding end caps (4).

2. The corrosion-resistant thin-walled composite stainless steel pipe as described in claim 1, characterized in that, The outer sides of both ends of the steel pipe body (1) are respectively provided with two convex rings (5), and the inner sides of both ends of the steel pipe body (1) are respectively provided with two concave rings (6).

3. The corrosion-resistant thin-walled composite stainless steel pipe as described in claim 2, characterized in that, The protrusion (7) is trapezoidal in shape.

4. The corrosion-resistant thin-walled composite stainless steel pipe as described in claim 3, characterized in that, The limiting ring (10) protrudes from the inner corrosion-resistant sleeve (2) and has a trapezoidal cross-section.

5. The corrosion-resistant thin-walled composite stainless steel pipe as described in claim 4, characterized in that, The cross-section of the abutment ring (12) is a right trapezoid shape.

6. The corrosion-resistant thin-walled composite stainless steel pipe as described in claim 5, characterized in that, The end cap (4) also has external threads on its outer side.

7. The corrosion-resistant thin-walled composite stainless steel pipe as described in claim 6, characterized in that, The outer corrosion-resistant sleeve (3) is also provided with anti-slip texture.

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