High-strength composite stainless steel seamless steel pipe for spaceflight

Abstract

The utility model provides a high-strength composite stainless steel seamless steel tube for spaceflight, which comprises an inner tube and an outer tube, and the outer tube is coaxially, compositely and fixedly mounted outside the inner tube; according to the integral arrangement, the inner pipe and the outer pipe can be fixed together in a tenon-and-mortise mode after being compounded and before being welded, so that the stability between the inner pipe and the outer pipe can still be ensured when the welding position of the inner pipe and the outer pipe is subjected to desoldering in the later period, and the integral body is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seamless steel pipes, especially relates to a high-strength composite stainless steel seamless pipe for aerospace. BACKGROUND

[0002] The composite stainless steel seamless pipe is a seamless steel pipe composed of stainless steel and other materials (such as copper, aluminum, etc.) through a specific process. It combines the corrosion resistance of stainless steel and the excellent performance of other materials, and has a wide range of applications. According to different composite methods and material combinations, the composite stainless steel seamless pipe can be divided into various types.

[0003] However, the existing composite stainless steel seamless pipe, after being combined, is usually welded at both ends to ensure the stability after combination. Although the two ends are welded, the pressure bearing capacity is limited due to the small welding area, and once the weld cracks, looseness will occur.

[0004] Therefore, it is necessary to invent a high-strength composite stainless steel seamless pipe for aerospace. SUMMARY

[0005] To solve the above technical problems, the utility model provides a high-strength composite stainless steel seamless pipe for aerospace, which adopts the following technical scheme: a high-strength composite stainless steel seamless pipe for aerospace, comprising an inner pipe and an outer pipe, wherein: the outer pipe is coaxially and fixedly installed on the outer part of the inner pipe;

[0006] The outer part of the inner pipe is provided with a plurality of long protrusions in a ring array, the length of the long protrusion is the same as the length of the inner pipe, a limiting groove is formed between every two adjacent long protrusions, a plurality of U-shaped clamping grooves are uniformly arranged on one side of each long protrusion, and the opening of the U-shaped clamping groove is communicated with the corresponding limiting groove.

[0007] The inner surface of the outer pipe is provided with a plurality of groups of I-shaped columns in a ring array, the number of I-shaped columns in each group is the same as the number of U-shaped clamping grooves on one side of the corresponding long protrusion, and the I-shaped column is clamped in the corresponding U-shaped clamping groove.

[0008] A plurality of first protrusions are uniformly arranged in the limiting groove of the inner pipe, the number of first protrusions is the same as the number of U-shaped clamping grooves on one side of the long protrusion, and the first protrusion and the U-shaped clamping groove correspond to each other.

[0009] The inner surface of the outer pipe is provided with a plurality of groups of second protrusions in a ring array, the second protrusions are alternately arranged between the I-shaped columns, the number of second protrusions in each group is the same as the number of I-shaped columns, and the second protrusions, the I-shaped columns and the first protrusions correspond to each other.

[0010] The reinforcing strip is fixedly installed in the limiting groove of the inner tube, and is clamped between the first protrusion and the second protrusion and fixedly connected between the inner tube and the outer tube.

[0011] The outer side surface of the reinforcing strip is provided with an outer clamping groove, the length of the outer clamping groove is same as the length of the reinforcing strip, the second protrusion is clamped in the corresponding outer clamping groove, and the outer inner side surface of the reinforcing strip is provided with an inner clamping groove, the length of the inner clamping groove is same as the length of the reinforcing strip, and the first protrusion is clamped in the corresponding inner clamping groove.

[0012] Compared with the prior art, the inner tube and the outer tube are fixed together in a mortise and tenon type before welding, so that the stability between the inner tube and the outer tube can be ensured when the welding between the inner tube and the outer tube is disconnected, and the whole is safer and more reliable.

[0013] The whole is set, and after the inner tube and the outer tube are combined, the inner tube and the outer tube can be fixed together in a mortise and tenon type before welding, so that the stability between the inner tube and the outer tube can be ensured when the welding between the inner tube and the outer tube is disconnected, and the whole is safer and more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the utility model.

[0015] Figure 2 It is the structure schematic view of the H-shaped column not entering the U-shaped clamping groove.

[0016] Figure 3 It is the structure schematic view of the H-shaped column entering the U-shaped clamping groove.

[0017] Figure 4 It is the outer tube local cutaway structure schematic view of the utility model.

[0018] Figure 5 It is the whole explosion structure schematic view of the utility model.

[0019] In the drawing:

[0020] Inner tube 1, limiting groove 2, long strip protrusion 3, first protrusion 4, U-shaped clamping groove 5, outer tube 6, H-shaped column 7, second protrusion 8, reinforcing strip 9, outer clamping groove 10, inner clamping groove 11. DETAILED DESCRIPTION

[0021] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor should belong to the protection scope of the utility model.

[0022] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] The utility model is further described below in combination with the drawings:

[0024] Embodiments

[0025] Referring to Figures 1-5 A high-strength composite stainless steel seamless steel pipe for aerospace includes an inner pipe 1 and an outer pipe 6, wherein: the outer pipe 6 is coaxially and fixedly installed on the outer part of the inner pipe 1;

[0026] The outer pipe 6 is a stainless steel seamless steel pipe;

[0027] The inner pipe 1 is a carbon fiber pipe, a metal matrix composite material, etc.;

[0028] The metal matrix composite material is a composite material composed of a metal matrix and a reinforcing phase (such as ceramic particles, fibers, etc.);

[0029] In the embodiment, the circumferential surface of the outer part of the inner pipe 1 is provided with a plurality of long protrusions 3 in an annular array, the length of the long protrusion 3 is the same as the length of the inner pipe 1, and a limiting groove 2 is formed between every two adjacent long protrusions 3, so that space is provided for the I-shaped column 7 when the inner pipe 1 is inserted into the outer pipe 6, preventing the I-shaped column 7 from being locked and blocked, and a plurality of U-shaped clamping grooves 5 are uniformly arranged on one side of each long protrusion 3, and the opening of the U-shaped clamping groove 5 is communicated with the corresponding limiting groove 2, so that after the inner pipe 1 is inserted into the outer pipe 6, the I-shaped column 7 can be inserted into the corresponding U-shaped clamping groove 5 from the limiting groove 2 by rotating the inner pipe 1 and the outer pipe 6, and clamped;

[0030] In the embodiment, the inner surface of the outer pipe 6 is provided with a plurality of groups of I-shaped columns 7 in an annular array, the number of I-shaped columns 7 in each group is the same as the number of U-shaped clamping grooves 5 on one side of the long strip protrusion 3, the I-shaped columns 7 are clamped in the corresponding U-shaped clamping grooves 5, and the arrangement of the I-shaped columns 7 and the U-shaped clamping grooves 5 clamped together ensures the stability between the outer pipe 6 and the inner pipe 1, and prevents displacement between the inner pipe 1 and the outer pipe 6.

[0031] In the embodiment, the limiting grooves 2 of the inner pipe 1 are uniformly provided with a plurality of first protrusions 4, the number of the first protrusions 4 is the same as the number of the U-shaped clamping grooves 5 on one side of the long strip protrusion 3, and the first protrusions 4 correspond to the U-shaped clamping grooves 5 one by one, so as to limit the inner pipe 1 and the reinforcing strip 9 through the first protrusions 4, and prevent rotation between the reinforcing strip 9 and the inner pipe 1.

[0032] In the embodiment, the inner surface of the outer pipe 6 is provided with a plurality of groups of second protrusions 8 in an annular array, the second protrusions 8 are arranged alternately between the I-shaped columns 7, the number of the second protrusions 8 in each group is the same as the number of the I-shaped columns 7, and the second protrusions 8 correspond to the I-shaped columns 7 and the first protrusions 4 one by one, so as to limit the outer pipe 6 and the reinforcing strip 9 through the second protrusions 8, and prevent rotation between the reinforcing strip 9 and the outer pipe 6.

[0033] In the embodiment, the limiting grooves 2 of the inner pipe 1 are fixedly installed with the reinforcing strip 9, the reinforcing strip 9 is clamped between the first protrusions 4 and the second protrusions 8, the reinforcing strip 9 is fixedly connected between the inner pipe 1 and the outer pipe 6, and the reinforcing strip 9 can block the limiting grooves 2, so as to prevent the I-shaped columns 7 from being pulled out of the U-shaped clamping grooves 5.

[0034] In the embodiment, the outer side of the reinforcing strip 9 is provided with an outer clamping groove 10, the length of the outer clamping groove 10 is the same as the length of the reinforcing strip 9, the second protrusions 8 are clamped in the corresponding outer clamping grooves 10, so as to provide installation space for the second protrusions 8 through the outer clamping grooves 10, and ensure the stability between the reinforcing strip 9 and the outer pipe 6, the outer side of the reinforcing strip 9 is provided with an inner clamping groove 11, the length of the inner clamping groove 11 is the same as the length of the reinforcing strip 9, and the first protrusions 4 are clamped in the corresponding inner clamping grooves 11, so as to provide installation space for the first protrusions 4 through the inner clamping grooves 11, and ensure the stability between the reinforcing strip 9 and the inner pipe 1.

[0035] The technical scheme disclosed in the utility model, or the similar technical scheme designed by the person skilled in the art under the inspiration of the technical scheme of the utility model, and achieving the above technical effects, all fall within the protection scope of the utility model.

Claims

1. A high-strength, composite stainless steel seamless pipe for aerospace applications, characterized by: It comprises an inner tube (1) and an outer tube (6), wherein: the outer tube (6) is coaxially and fixedly installed on the outer part of the inner tube (1); The outer circumferential surface of the inner tube (1) is provided with a plurality of long strip protrusions (3) in an annular array, the length of the long strip protrusion (3) is the same as the length of the inner tube (1), a limiting groove (2) is formed between every two adjacent long strip protrusions (3), and a plurality of U-shaped clamping grooves (5) are uniformly arranged on one side of each long strip protrusion (3), the opening of the U-shaped clamping groove (5) is communicated with the corresponding limiting groove (2). The inner surface of the outer tube (6) is provided with a plurality of groups of I-shaped columns (7) in an annular array, the number of the I-shaped column (7) in each group is the same as the number of the U-shaped clamping groove (5) on one side of the corresponding long strip protrusion (3), and the I-shaped column (7) is clamped in the corresponding U-shaped clamping groove (5).

2. The high-strength, composite stainless steel seamless pipe for aerospace use of claim 1, wherein: A plurality of first protrusions (4) are uniformly arranged in the limiting groove (2) of the inner tube (1), the number of the first protrusion (4) is the same as the number of the U-shaped clamping groove (5) on one side of the long strip protrusion (3), and the first protrusion (4) corresponds to the U-shaped clamping groove (5) one by one.

3. The aerospace high-strength composite stainless steel seamless pipe as described in claim 2, characterized in that: The inner surface of the outer tube (6) is provided with a plurality of groups of second protrusions (8) in an annular array, the second protrusion (8) and the I-shaped column (7) are arranged alternately, the number of the second protrusion (8) in each group is the same as the number of the I-shaped column (7), and the second protrusion (8) corresponds to the I-shaped column (7) and the first protrusion (4) one by one.

4. The aerospace high-strength composite stainless steel seamless pipe as described in claim 3, characterized in that: The limiting groove (2) of the inner tube (1) is fixedly installed with a reinforcing strip (9), the reinforcing strip (9) is clamped between the first protrusion (4) and the second protrusion (8), and the reinforcing strip (9) is fixedly connected between the inner tube (1) and the outer tube (6).

5. The aerospace high-strength composite stainless steel seamless pipe as described in claim 4, characterized in that: An outer clamping groove (10) is formed in the outer side surface of the reinforcing strip (9), the length of the outer clamping groove (10) is the same as the length of the reinforcing strip (9), the second protrusion (8) is clamped in the corresponding outer clamping groove (10), an inner clamping groove (11) is formed in the outer inner side surface of the reinforcing strip (9), the length of the inner clamping groove (11) is the same as the length of the reinforcing strip (9), and the first protrusion (4) is clamped in the corresponding inner clamping groove (11).

Images