Compression-resistant stainless steel corrugated pipe

Abstract

The utility model discloses a compression-resistant stainless steel corrugated pipe, which relates to the field of stainless steel corrugated pipes, and comprises a corrugated pipe body, annular plane flanges are respectively arranged at two ends of the pipe body, the annular plane flanges and the pipe body are integrally arranged, and the extension planes of the annular plane flanges are perpendicular to the axis of the pipe body. The outer diameter of the annular plane flange is larger than that of the pipe body. According to the compression-resistant stainless steel corrugated pipe, through the arrangement of the protrusions, the annular plane flanges abut against and guide deformation, the first rubber gaskets are forced to evenly fill sealing face gaps towards the two sides of the protrusions, the sealing contact area is increased, and therefore the sealing effect is greatly improved, and the probability of water leakage at the connecting position of the ends of the pipe body is reduced.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel corrugated pipes, and more particularly to a pressure-resistant stainless steel corrugated pipe. Background Technology

[0002] Compared to traditional stainless steel pipes, stainless steel corrugated pipes utilize the "pleated" structure of the corrugated shape (U-shape, Ω-shape, etc.) to effectively increase the moment of inertia of the cross-section, significantly improving bending stiffness and enhancing resistance to external extrusion deformation. When connecting these pressure-resistant stainless steel corrugated pipes, the hexagonal connector at the end is tightened to the external threaded connector of the object, and the flat flange at the end of the corrugated pipe abuts against the external threaded connector. A sealing gasket is placed between the flat flange and the opposing external threaded connector to achieve a sealing effect. However, in actual use, a single-layer sealing gasket often has poor waterproofing performance, resulting in leakage. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a pressure-resistant stainless steel corrugated pipe that improves the sealing and leak-proof effect at the connection position at the end of the pipe.

[0004] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0005] A pressure-resistant stainless steel corrugated pipe includes a corrugated pipe body, with annular planar flanges at both ends of the pipe body. The extension plane of the annular planar flanges is perpendicular to the axis of the pipe body and has an outer diameter larger than the outer diameter of the pipe body. A hexagonal pipe joint is fitted at the end of the pipe body, and a shoulder is formed on the inner wall of the hexagonal pipe joint. The annular planar flange is directly opposite the shoulder.

[0006] The annular planar flange has a protrusion on the side facing the shoulder, and at least one first rubber washer is provided between the shoulder and the annular planar flange. When the hexagonal pipe joint is threaded to the external threaded pipe joint, the external threaded pipe joint presses against the annular planar flange, forcing the first rubber washer to deform to both sides of the protrusion due to the restriction of the shoulder and the inner wall of the hexagonal pipe joint.

[0007] Optionally, the protrusion is a continuous annular structure with a semi-circular cross-section. The shoulder of the hexagonal pipe joint extends towards the pipe body and wraps around the pipe body with at least two corrugated protrusions. A retaining ring is fixed on the inner wall of the hexagonal pipe joint, and the inner ring of the retaining ring is flush with the inner wall of the hexagonal pipe joint near the end of the pipe body.

[0008] Optionally, the maximum outer diameter of the corrugated protrusion on the outer side of the pipe body is smaller than the inner diameter of the hexagonal pipe joint. The corrugated protrusion can contact the inner wall of the hexagonal pipe joint. The annular planar flange is integrally formed with the pipe body. A chamfer is provided on the inner wall of the end of the hexagonal pipe joint facing away from the pipe body.

[0009] Compared with the prior art, the advantages of this utility model are as follows:

[0010] This invention forms a bidirectional sealing barrier by pressing the first rubber gasket in the forward direction of the external threaded pipe joint, while the second rubber gasket compensates in the reverse direction. It can maintain the integrity of the seal even when the pressure fluctuates. The protrusion is designed so that the deformation is guided by the annular planar flange, which forces the first rubber gasket to fill the gap of the sealing surface evenly on both sides of the protrusion. This increases the sealing contact area and thus greatly improves the sealing effect. The protrusion also increases the strength of the annular planar flange. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is a side sectional view of the hexagonal pipe connector of this utility model.

[0013] Figure 3 This utility model Figure 2 Enlarged view of point A.

[0014] Figure 4 This is a schematic diagram of the protruding structure of this utility model.

[0015] Reference numerals: 1. Pipe body; 101. Corrugated protrusion; 2. Annular flat flange; 3. Hexagonal pipe joint; 301. Shoulder; 302. Retaining ring; 4. Protrusion; 5. First rubber gasket; 6. Second rubber gasket. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Please see Figures 1 to 4 This embodiment provides a pressure-resistant stainless steel corrugated pipe, including a corrugated pipe body 1, which is made of stainless steel. Both ends of the pipe body 1 are provided with annular planar flanges 2, which are integrally formed with the pipe body 1. The extension plane of the annular planar flanges 2 is perpendicular to the axis of the pipe body 1. The outer diameter of the annular planar flanges 2 is larger than the outer diameter of the pipe body 1. A hexagonal pipe connector 3 is sleeved on the end of the pipe body 1. The inner wall of the hexagonal pipe connector 3 facing away from the pipe body 1 is chamfered to facilitate the insertion of the hexagonal pipe connector 3 into the outer side of the opposite external threaded pipe connector.

[0018] The annular planar flange 2 faces the shoulder 301 of the inner wall of the hexagonal pipe connector 3. A protrusion 4 protrudes from the middle of the annular planar flange 2 towards one side of the shoulder 301. The protrusion 4 is annular in shape from a view of the end of the pipe body 1, and its cross-section is semi-circular. First rubber gaskets 5 are fixed to both sides of the annular planar flange 2 facing the protrusion 4 on the shoulder 301. A retaining ring 302 is fixed to the inner ring of the shoulder 301. The inner ring of the retaining ring 302 is flush with the inner wall of the hexagonal pipe connector 3 near the end of the pipe body 1. After the hexagonal pipe connector 3 is threaded onto the external threaded pipe connector and tightened, the pipe body 1... The external threaded pipe fitting abuts against the annular planar flange 2, pushing it to press against one side of the shoulder 301, thereby pressing the two first rubber gaskets 5, causing the first rubber gaskets 5 to deform. However, due to the obstruction of the inner wall of the hexagonal pipe fitting 3 away from the pipe body 1 and the obstruction of the outer ring of the retaining ring 302, the two first rubber gaskets 5 tend to deform towards each other, that is, they eventually abut against the two sides of the protrusion 4 respectively. In actual connection, a second rubber gasket 6 is also placed on the side of the annular planar flange 2 away from the protrusion 4, which greatly improves the sealing effect when the end of the pipe body 1 is connected to the opposite pipe fitting.

[0019] Furthermore, in order to reduce the probability of damage at the connection point between the tube body 1 and the annular planar flange 2 caused by the translation of the tube body 1, the hexagonal tube connector 3 extends towards the tube body 1 from the side of the shoulder 301 near the tube body 1, and surrounds at least two corrugated protrusions 101 of the tube body 1. The outer diameter of the largest part of the outer side of the tube body 1 is slightly smaller than the inner diameter of the hexagonal tube connector 3 near the end of the tube body 1. In this way, the corrugated protrusions 101 can abut against the inner wall of the hexagonal tube connector 3, thereby reducing the probability of the tube body 1 shifting at this point and reducing the probability of twisting and damage at the connection point between the tube body 1 and the annular planar flange 2.

[0020] In summary, by setting the protrusion 4, the annular planar flange 2 guides the deformation, forcing the first rubber gasket 5 to uniformly fill the gap of the sealing surface on both sides of the protrusion 4, increasing the sealing contact area, thereby greatly improving the sealing effect and reducing the probability of water leakage at the connection position of the end of the pipe body 1.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant stainless steel corrugated pipe, comprising a corrugated pipe body (1), characterized in that: The tube body (1) has annular planar flanges (2) at both ends. The extension plane of the annular planar flanges (2) is perpendicular to the axis of the tube body (1) and the outer diameter is larger than the outer diameter of the tube body (1). A hexagonal tube connector (3) is fitted at the end of the tube body (1). A shoulder (301) is formed on the inner wall of the hexagonal tube connector (3). The annular planar flanges (2) are directly opposite the shoulder (301). The annular planar flange (2) has a protrusion (4) on the side facing the shoulder (301). At least one first rubber gasket (5) is provided between the shoulder (301) and the annular planar flange (2). When the hexagonal pipe joint (3) is threaded to the external threaded pipe joint, the external threaded pipe joint presses against the annular planar flange (2), forcing the first rubber gasket (5) to deform to both sides of the protrusion (4) due to the restriction of the shoulder (301) and the inner wall of the hexagonal pipe joint (3).

2. The pressure-resistant stainless steel corrugated pipe according to claim 1, characterized in that, The protrusion (4) is a continuous annular structure with a semi-circular cross-section.

3. The pressure-resistant stainless steel corrugated pipe according to claim 2, characterized in that, The shoulder (301) of the hexagonal pipe connector (3) extends toward the pipe body (1) and wraps around at least two corrugated protrusions (101) of the pipe body (1).

4. The pressure-resistant stainless steel corrugated pipe according to claim 2, characterized in that, The inner wall of the hexagonal pipe joint (3) is fixed with a retaining ring (302), and the inner ring of the retaining ring (302) is flush with the inner wall of the hexagonal pipe joint (3) near the end of the pipe body (1).

5. The pressure-resistant stainless steel corrugated pipe according to claim 4, characterized in that, The maximum outer diameter of the corrugated protrusion (101) on the outer side of the tube body (1) is smaller than the inner diameter of the hexagonal tube joint (3), and the corrugated protrusion (101) can contact the inner wall of the hexagonal tube joint (3).

6. The pressure-resistant stainless steel corrugated pipe according to claim 1, characterized in that, The annular planar flange (2) is integrally formed with the tube body (1).

7. The pressure-resistant stainless steel corrugated pipe according to claim 1, characterized in that, The hexagonal pipe connector (3) has a chamfer on the inner wall of the end opposite to the pipe body (1).

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