Corrosion-resistant and high-temperature-resistant composite stainless steel pipe for nuclear industry

Abstract

The utility model discloses a corrosion-resistant high-temperature-resistant composite stainless steel pipe for nuclear industry, which comprises a pipe body and a connecting piece, the pipe body comprises a stainless steel pipe and a ceramic pipe compounded in the stainless steel pipe, the connecting piece comprises a joint and a fixing sleeve, the end part of the ceramic pipe is also provided with a first sealing piece, and the two ends of the joint are respectively provided with an insertion end; the two inserting ends are further provided with positioning protruding strips respectively, a positioning groove is formed in the end of the stainless steel pipe, a circle of positioning groove is further formed in the middle of the connector, the fixing sleeve is composed of an upper sleeve body and a lower sleeve body, and the inner side of the upper sleeve body and the inner side of the lower sleeve body are further provided with positioning protruding rings corresponding to the positioning groove respectively. According to the stainless steel pipe joint, the structure is simpler, the stainless steel pipe joint can be suitable for batch production, and after the two pipe bodies are connected, the strength and the sealing performance of the connecting position of the two pipe bodies are more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of nuclear industry with corrosion-resistant high-temperature composite stainless steel pipe. BACKGROUND

[0002] The composite stainless steel pipe for nuclear industry in prior art is generally composed of outer pipe and inner pipe, and has high corrosion resistance and high-temperature resistance. However, the composite structure of such pipe body is generally complex, which is not convenient for mass production, and also leads to difficulty in connecting the two pipe bodies. After the two pipe bodies are connected, the strength and sealing reliability of the connection are poor, and leakage may occur. SUMMARY

[0003] The utility model aims at overcoming the deficiencies of the prior art, and provides a nuclear industry with corrosion-resistant high-temperature composite stainless steel pipe, which has a simpler structure and is suitable for mass production. After the two pipe bodies are connected, the strength and sealing reliability of the connection are more reliable.

[0004] The technical scheme of the utility model is as follows: a nuclear industry with corrosion-resistant high-temperature composite stainless steel pipe, comprising a pipe body and a connecting piece, wherein the pipe body comprises a stainless steel pipe and a ceramic pipe which is combined inside the stainless steel pipe, and the two ends of the ceramic pipe are kept at a distance from the two ends of the stainless steel pipe.

[0005] The connecting piece comprises a joint and a fixing sleeve.

[0006] The end of the ceramic pipe is also provided with a first sealing piece.

[0007] The joint has an insertion end corresponding to the inner diameter of the stainless steel pipe at each end, and a positioning protrusion is arranged on each insertion end. A positioning groove corresponding to the positioning protrusion is arranged in the end of the stainless steel pipe. The insertion end is inserted into the end of the stainless steel pipe and abuts against the first sealing piece. The positioning protrusion is matched with the corresponding positioning groove.

[0008] The outer diameter of the joint is consistent with the outer diameter of the stainless steel pipe, and the joint has a positioning groove in the middle.

[0009] The fixing sleeve is composed of an upper sleeve body and a lower sleeve body, and the upper sleeve body and the lower sleeve body each have a first screw hole. The two ends of the stainless steel pipe each have a second screw hole corresponding to the first screw hole. The inner side of the upper sleeve body and the lower sleeve body each has a positioning protrusion ring corresponding to the positioning groove.

[0010] The upper sleeve body and the lower sleeve body are fixed at the ends of the stainless steel pipe by screws. The positioning protrusion rings of the upper sleeve body and the lower sleeve body are matched with the corresponding positioning grooves. The upper sleeve body and the lower sleeve body are fixed by bolts and nuts.

[0011] Further, the stainless steel pipe and the ceramic pipe are integrated by a bonding layer.

[0012] Specifically, the joint and the insertion end are a ceramic integrated structure.

[0013] Further, the first sealing member comprises a ring body and a convex ring arranged at one end of the ring body, the convex ring has a trapezoidal cross section, the end of the ceramic pipe has a socket corresponding to the convex ring, the convex ring is inserted into the socket, and the ring body abuts against the end of the ceramic pipe.

[0014] Specifically, the second screw hole does not penetrate the inside of the stainless steel pipe.

[0015] Further, a second sealing member is arranged between the joint and the end of the stainless steel pipe.

[0016] Specifically, the second sealing member is a ring-shaped sealing member.

[0017] Specifically, the first sealing member and the second sealing member are graphite integrated structures.

[0018] Further, the two insertion ends of the joint are respectively provided with chamfers.

[0019] Specifically, the length of the fixing sleeve is greater than the length of the joint, and the second screw hole is arranged away from the end of the ceramic pipe.

[0020] The utility model discloses a pipe connecting structure, which comprises a joint, a ceramic pipe and a stainless steel pipe, wherein the joint is arranged between the ceramic pipe and the stainless steel pipe, the joint has two insertion ends, and the two insertion ends are respectively inserted into the ends of the ceramic pipe and the stainless steel pipe. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the sectional view of the utility model;

[0022] Figure 2 is the structural schematic view of the utility model;

[0023] Figure 3 is the structural schematic view of the connecting piece in the utility model;

[0024] Figure 4 It is the structural diagram of the first sealing piece of the utility model.

[0025] In the figure: stainless steel pipe 1, ceramic pipe 2, joint 3, first sealing piece 4, insertion end 5, positioning convex strip 6, positioning groove 7, upper sleeve body 8, lower sleeve body 9, positioning convex ring 10, ring body 11, convex ring 12, second sealing piece 13. DETAILED DESCRIPTION

[0026] The technical scheme of the utility model will be further specifically explained below by examples and in combination with the drawings.

[0027] In combination with Figures 1-4 It is shown that a kind of nuclear industry is used to corrosion-resistant high-temperature composite stainless steel pipe, including pipe body and connecting piece;

[0028] The pipe body includes stainless steel pipe 1 and ceramic pipe 2 which is combined in the stainless steel pipe 1, the both ends of the ceramic pipe 2 and the both ends of the stainless steel pipe 1 keep spacing respectively;

[0029] The connecting piece includes joint 3 and fixed sleeve;

[0030] The end of the ceramic pipe 2 is also provided with first sealing piece 4;

[0031] The both ends of the joint 3 have insertion end 5 corresponding to the inner diameter of the stainless steel pipe 1, and positioning convex strip 6 is also respectively arranged on the both ends of the insertion end 5, and the end of the stainless steel pipe 1 is also provided with positioning groove corresponding to positioning convex strip 6, the insertion end 5 is inserted into the end of the stainless steel pipe 1 and abuts with first sealing piece 4, and the positioning convex strip 6 is matched with corresponding positioning groove;

[0032] The outer diameter of the joint 3 is consistent with the outer diameter of the stainless steel pipe 1, and the middle part of the joint 3 is also provided with a circle of positioning groove 7;

[0033] The fixed sleeve is composed of upper sleeve body 8 and lower sleeve body 9, the upper sleeve body 8 and the lower sleeve body 9 are respectively provided with first screw hole, the both ends of the stainless steel pipe 1 are respectively provided with second screw hole corresponding to first screw hole, and the inner side of the upper sleeve body 8 and the lower sleeve body 9 is also respectively provided with positioning convex ring 10 corresponding to positioning groove 7;

[0034] The upper sleeve body 8 and the lower sleeve body 9 are respectively fixed in the end of the stainless steel pipe 1 by screw, the positioning convex ring 10 of the upper sleeve body 8 and the lower sleeve body 9 is matched with corresponding positioning groove 7 respectively, and the upper sleeve body 8 and the lower sleeve body 9 are also fixed by bolt nut.

[0035] The structure has the advantages of simple structure and convenient batch production. The ceramic tube 2 is arranged in the stainless steel tube 1, and has excellent corrosion resistance and high temperature resistance. When the two tube bodies are connected, the joint 3 is used to butt the two tube bodies and position the hole positions of the two stainless steel tubes 1, so that the first screw hole and the second screw hole are aligned. The first screw hole and the second screw hole are aligned, and the joint 3 is installed in place. The two tube bodies are connected through the joint 3 and the fixing sleeve, and the fixing sleeve is connected to the ends of the two stainless steel tubes 1, which can ensure the strength of the connection between the two tube bodies. The connection between the two insertion ends 5 of the joint 3 and the ceramic tube 2 and the connection between the joint 3 and the stainless steel tube 1 are also provided with first and second sealing members 13, which can effectively prevent leakage and ensure the sealing of the connection between the two tube bodies.

[0036] In another embodiment, as shown in Figure 1 The stainless steel tube 1 and the ceramic tube 2 are combined into one through a bonding layer.

[0037] Specifically, the joint 3 and the insertion end 5 are a ceramic integrated structure.

[0038] In another embodiment, as shown in Figure 1 The first sealing member 4 includes a ring body 11 and a protruding ring 12 arranged at one end of the ring body 11. The cross section of the protruding ring 12 is trapezoidal. The end of the ceramic tube 2 has a socket corresponding to the protruding ring 12. The protruding ring 12 is inserted into the socket. The ring body 11 abuts against the end of the ceramic tube 2 to ensure the sealing of the connection between the first sealing member 4 and the ceramic tube 2.

[0039] In another embodiment, as shown in Figure 1 The second screw hole does not penetrate the inside of the stainless steel tube 1 to avoid leakage.

[0040] In another embodiment, as shown in Figure 1 The second sealing member 13 is arranged between the joint 3 and the end of the stainless steel tube 1.

[0041] In another embodiment, as shown in Figure 1 The second sealing member 13 is a ring-shaped sealing member.

[0042] In another embodiment, the first sealing member 4 and the second sealing member 13 are graphite integrated structures.

[0043] In another embodiment, as shown in Figure 1 The ends of the two insertion ends 5 of the joint 3 are also provided with chamfers, so as to be inserted into the stainless steel tube 1.

[0044] In another embodiment, in combinationFigure 1 and Figure 2 As shown in the figure, the length of the fixing sleeve is greater than the length of the joint 3, and the second screw hole is arranged away from the end of the ceramic tube 2 to avoid affecting the strength of the joint between the two tube bodies.

Claims

1. A corrosion and high temperature resistant composite stainless steel pipe for nuclear industry, comprising a pipe body and a connecting member, characterized in that, The pipe body comprises a stainless steel pipe (1) and a ceramic pipe (2) which is combined inside the stainless steel pipe (1), and the two ends of the ceramic pipe (2) are kept apart from the two ends of the stainless steel pipe (1) respectively; The connecting piece comprises a joint (3) and a fixing sleeve; The end of the ceramic pipe (2) is also provided with a first sealing piece (4); The two ends of the joint (3) are respectively provided with an insertion end (5) corresponding to the inner diameter of the stainless steel pipe (1), and the two insertion ends (5) are respectively provided with a positioning convex strip (6), and the end of the stainless steel pipe (1) is also provided with a positioning groove corresponding to the positioning convex strip (6), the insertion end (5) is inserted into the end of the stainless steel pipe (1) and abuts against the first sealing piece (4), and the positioning convex strip (6) is matched with the corresponding positioning groove; The outer diameter of the joint (3) is consistent with the outer diameter of the stainless steel pipe (1), and the middle part of the joint (3) is also provided with a positioning groove (7); The fixing sleeve is composed of an upper sleeve body (8) and a lower sleeve body (9), the upper sleeve body (8) and the lower sleeve body (9) are respectively provided with a first screw hole, the two ends of the stainless steel pipe (1) are respectively provided with a second screw hole corresponding to the first screw hole, and the inner side of the upper sleeve body (8) and the lower sleeve body (9) is respectively provided with a positioning convex ring (10) corresponding to the positioning groove (7); The upper sleeve body (8) and the lower sleeve body (9) are respectively fixed on the end of the stainless steel pipe (1) through screws, the positioning convex ring (10) of the upper sleeve body (8) and the lower sleeve body (9) is respectively matched with the corresponding positioning groove (7), and the upper sleeve body (8) and the lower sleeve body (9) are fixed through a bolt and a nut.

2. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 1, characterized in that, The stainless steel pipe (1) and the ceramic pipe (2) are combined into one through a bonding layer.

3. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 2, characterized in that, The joint (3) and the insertion end (5) are a ceramic integrated structure.

4. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 3, characterized in that, The first sealing piece (4) comprises a ring body (11) and a convex ring (12) provided at one end of the ring body (11), the cross section of the convex ring (12) is trapezoidal, the end of the ceramic pipe (2) is provided with a socket corresponding to the convex ring (12), the convex ring (12) is inserted into the socket, and the ring body (11) abuts against the end of the ceramic pipe (2).

5. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 4, characterized in that, The second screw hole does not penetrate the inside of the stainless steel pipe (1).

6. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 5, characterized in that, The second sealing piece (13) is also provided between the joint (3) and the end of the stainless steel pipe (1).

7. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 6, characterized in that, The second sealing piece (13) is a ring-shaped sealing piece.

8. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 7, characterized in that, The first sealing piece (4) and the second sealing piece (13) are both graphite integrated structures.

9. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 8, characterized in that, The two insertion ends (5) of the joint (3) are respectively provided with a chamfer at the end.

10. The corrosion and high temperature resistant composite stainless steel pipe for nuclear industry according to claim 9, characterized by, The length of the fixing sleeve is greater than the length of the joint (3), and the second screw hole is arranged away from the end of the ceramic pipe (2).

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