A coupling assembly for connecting double wall pipe

Abstract

The utility model discloses a kind of for connecting double-wall pipe connecting assembly, the utility model relates to the technical field of connecting and fixing two double-wall pipes together, it includes first connecting disc and second connecting disc, the central part of first connecting disc is equipped with first center hole, first connecting disc is equipped with a plurality of first air hole in the circumferential direction along first center hole, the outer edge of first connecting disc is equipped with a plurality of first flange hole located in the outside of first air hole, the left end surface of first connecting disc is equipped with a ring of first annular clamping slot located between first flange hole and first air hole, the right end surface of first connecting disc is equipped with large annular mounting groove located between first air hole and first flange hole, the right end surface of first connecting disc is equipped with small annular mounting groove located between first air hole and first center hole.The beneficial effects of the utility model are: good sealing effect, more firm connection.

Description

Technical Field

[0001] This utility model relates to the technical field of connecting and fixing two double-walled tubes together, and in particular to a connecting assembly for connecting double-walled tubes. Background Technology

[0002] A double-walled tube consists of an inner tube and an outer tube, with the inner tube placed inside the outer tube. The manufacturing process requires connecting the two double-walled tubes together, allowing them to transport two different types of gases or liquids. Currently, the main methods used are as follows: Figures 1-4 The connector shown connects two double-walled pipes together. The connector includes a first flange 1 and a second flange 2. The structure of the first flange 1 is the same as that of the second flange 2. A central hole 3 is provided in the center of the first flange 1. Multiple vent holes 4 are provided in the first flange 1 along the circumferential direction of the central hole 3. Multiple flange holes 5 located outside the vent holes 4 are provided on the outer edge of the first flange 1 along the circumferential direction of its central hole 3.

[0003] The method by which workers use this connector to connect two double-walled pipes together is as follows: S1. The worker takes out a double-walled pipe A and welds both the outer pipe A7 and the inner pipe A6 of the double-walled pipe A to the left end face of the first flange 1, as follows. Figure 5 As shown, ensure that the inner tube A6 is connected to the center hole 3 of the first flange 1, and at the same time, ensure that the area enclosed by the outer tube A7 and the inner tube A6 is connected to the vent hole 4. S2. Take out a double-walled pipe B, and weld both the outer pipe B9 and the inner pipe B8 of the double-walled pipe B to the right end face of the second flange 2, as follows. Figure 6 As shown, ensure that the inner tube B8 is connected to the center hole 3 of the first flange 1, and at the same time, ensure that the area enclosed by the outer tube B9 and the inner tube B8 is connected to the vent hole 4. S3. The worker places the right end face of the first flange 1 against the left end face of the second flange 2, and ensures that the flange holes 5 of the first flange 1 are connected to the flange holes 5 of the second flange 2 respectively. S4. Use screws 10 to pass through flange hole 5, and then connect nuts 11 to fix the first flange 1 and the second flange 2 together. Figure 7 As shown, this allows for the connection of double-walled tube A and double-walled tube B using the connector.

[0004] During use, a type of gas is introduced into the inner tube A6, in the following direction: Figure 7 As shown by the solid arrow, this type of gas flows sequentially through inner pipe A6, the center hole 3 of first flange 1, the center hole 3 of second flange 2, and inner pipe B8, finally flowing into the next device. Another type of gas is introduced into outer pipe A7 in the following direction... Figure 7As shown by the hollow arrow, the gas flows sequentially through the annular cavity between the inner tube A6 and the outer tube A7, through the vent 4, through the annular cavity between the inner tube B8 and the outer tube B9, and finally flows to another device.

[0005] However, although this connector can connect double-walled tube A and double-walled tube B together, the following technical defects still emerge in actual use: I. The gas flowing through the vent 4 will not only leak to the outside through the gap between the first flange 1 and the second flange 2, but will also leak into the inner tube A6 and the inner tube B8, causing the two types of gas to mix together [which is actually not allowed to be mixed]. Therefore, the sealing effect of this connector is poor.

[0006] II. Since both the inner tube A6 and the outer tube A7 are welded to the left end face of the first flange 1, the first flange 1 does not provide good support for the inner tube A6 and the outer tube A7. Therefore, after a period of use, the inner tube A6 and the outer tube A7 fall off the first flange 1. This connector has a technical defect of unstable connection.

[0007] Therefore, there is an urgent need for a double-walled pipe connection assembly with good sealing performance and a more secure connection. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a connection assembly for connecting double-walled pipes.

[0009] The purpose of this utility model is achieved through the following technical solution: A connecting assembly for connecting double-walled pipes includes a first connecting plate 12 and a second connecting plate 13. A first central hole 14 is provided in the center of the first connecting plate 12. A plurality of first vent holes 15 are provided in the first connecting plate 12 along the circumferential direction of the first central hole 14. A plurality of first flange holes 16 located outside the first vent holes 15 are provided on the outer edge of the first connecting plate 12. A first annular groove 17 is provided on the left end face of the first connecting plate 12 between the first flange holes 16 and the first vent holes 15. A large annular mounting groove 18 is provided on the right end face of the first connecting plate 12 between the first vent holes 15 and the first flange holes 16. A small annular mounting groove 19 is provided on the right end face of the first connecting plate 12 between the first vent holes 15 and the first central hole 14. The second connecting plate 13 has a second central hole 20 in the center, and a plurality of second vent holes 21 are provided in the second connecting plate 13 along the circumferential direction of the second central hole 20. A plurality of second flange holes 22 located outside the second vent holes 21 are provided on the outer edge of the second connecting plate 13. A second annular groove 23 located between the second vent holes 21 is provided on the right end face of the second connecting plate 13.

[0010] The outer diameter of the first connecting plate 12 is equal to the outer diameter of the second connecting plate 13.

[0011] The large annular mounting groove 18, the small annular mounting groove 19 and the first central hole 14 of the first connecting plate 12 are coaxial, and the first annular slot 17 of the first connecting plate 12 is coaxial with the first central hole 14.

[0012] The second annular groove 23 of the second connecting disk 13 is coaxial with the second central hole 20.

[0013] The diameter of the first central hole 14 is equal to the diameter of the second central hole 20.

[0014] The diameter of the first central hole 14 is equal to the outer diameter of the inner tube A6.

[0015] This utility model has the following advantages: good sealing effect and more secure connection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first flange of a connector in the prior art; Figure 2 for Figure 1 The left view; Figure 3 This is a schematic diagram of the structure of the second flange of a connector in the prior art; Figure 4 for Figure 3 The right view; Figure 5 This is a schematic diagram showing the welding of both the outer tube A and the inner tube A of the double-walled pipe A to the left end face of the first flange. Figure 6 This is a schematic diagram showing the welding of both the outer tube B and the inner tube B of the double-walled pipe B to the right end face of the second flange. Figure 7 This is a schematic diagram showing how the first flange and the second flange are fixed together. Figure 8 This is a schematic diagram of the structure of the first connecting disc of this utility model; Figure 9 for Figure 8 Main section diagram; Figure 10 for Figure 9 The left view; Figure 11 for Figure 9 The right view; Figure 12 This is a schematic diagram of the structure of the second connecting disk of this utility model; Figure 13 for Figure 12 The right view; Figure 14 This is a schematic diagram showing both the inner tube A and the outer tube A of the double-walled pipe A being welded to the first connecting plate. Figure 15 A schematic diagram showing the installation of a small-diameter sealing ring into the small annular mounting groove of the first connecting plate; Figure 16 This is a schematic diagram showing the welding of both the inner tube B and the outer tube B of the double-walled pipe B to the second connecting plate. Figure 17 This is a schematic diagram showing the connection between double-walled pipe A and double-walled pipe B. Figure 18 for Figure 17 Main section diagram; In the picture: 1-First flange, 2-Second flange, 3-Center hole, 4-Vent hole, 5-Flange hole, 6-Inner pipe A, 7-Outer pipe A, 8-Inner pipe B, 9-Outer pipe B, 10-Screw, 11-Nut; 12-First connecting plate, 13-Second connecting plate, 14-First center hole, 15-First vent hole, 16-First flange hole, 17-First annular groove, 18-Large annular mounting groove, 19-Small annular mounting groove; 20-Second center hole, 21-Second vent hole, 22-Second flange hole, 23-Second annular groove; 24 - Small diameter sealing ring, 25 - Large diameter sealing ring. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description: like Figures 8-13 As shown, a connecting assembly for connecting double-walled pipes includes a first connecting plate 12 and a second connecting plate 13. A first central hole 14 is formed in the center of the first connecting plate 12. A plurality of first vent holes 15 are formed in the first connecting plate 12 along the circumferential direction of the first central hole 14. A plurality of first flange holes 16 are formed on the outer edge of the first connecting plate 12 outside the first vent holes 15. A first annular groove 17 is formed on the left end face of the first connecting plate 12 between the first flange holes 16 and the first vent holes 15. A large annular mounting groove 18 is formed on the right end face of the first connecting plate 12 between the first vent holes 15 and the first flange holes 16. A small annular mounting groove 19 is formed on the right end face of the first connecting plate 12 between the first vent holes 15 and the first central hole 14.

[0018] The second connecting plate 13 has a second central hole 20 in the center, and a plurality of second vent holes 21 are provided in the second connecting plate 13 along the circumferential direction of the second central hole 20. A plurality of second flange holes 22 located outside the second vent holes 21 are provided on the outer edge of the second connecting plate 13. A second annular groove 23 located between the second vent holes 21 is provided on the right end face of the second connecting plate 13.

[0019] The outer diameter of the first connecting plate 12 is equal to the outer diameter of the second connecting plate 13. The large annular mounting groove 18, the small annular mounting groove 19, and the first central hole 14 of the first connecting plate 12 are coaxial, and the first annular retaining groove 17 of the first connecting plate 12 is coaxial with the first central hole 14. The second annular retaining groove 23 of the second connecting plate 13 is coaxial with the second central hole 20.

[0020] The diameter of the first central hole 14 is equal to the diameter of the second central hole 20. The diameter of the first central hole 14 is equal to the outer diameter of the inner tube A6.

[0021] The method by which workers use this connecting assembly to connect two double-walled pipes together is as follows: S1. A worker takes out a double-walled pipe A and inserts the right end of the inner tube A6 of the double-walled pipe A into the first central hole 14 of the first connecting plate 12. Then, the worker welds the contact point between the inner tube A6 and the first connecting plate 12 using welding equipment. Next, the worker inserts the right end of the outer tube A7 of the double-walled pipe A into the first annular groove 17 and then welds the contact point between the outer tube A7 and the first connecting plate 12 using welding equipment. This achieves the welding of both the inner tube A6 and the outer tube A7 of the double-walled pipe A onto the first connecting plate 12. Figure 14 As shown, at this time, the inner tube A6 is connected to the first central hole 14, and at the same time, the area enclosed by the outer tube A7 and the inner tube A6 is connected to the first vent hole 15. S2. The worker removes a large-diameter sealing ring 25 and a small-diameter sealing ring 24, and then installs the small-diameter sealing ring 24 into the small annular mounting groove 19 of the first connecting plate 12, as follows. Figure 15 As shown, the large-diameter sealing ring 25 is then installed into the large annular mounting groove 18 of the first connecting plate 12; S3. The worker takes out a double-walled pipe B and inserts the left end of the inner tube B8 of the double-walled pipe B into the second central hole 20 of the second connecting plate 13. Then, the worker welds the contact point between the inner tube B8 and the second connecting plate 13 using welding equipment. Next, the worker inserts the left end of the outer tube B9 of the double-walled pipe B into the second annular groove 23 and then welds the contact point between the outer tube B9 and the second connecting plate 13 using welding equipment. This achieves the welding of both the inner tube B8 and the outer tube B9 of the double-walled pipe B onto the second connecting plate 13. Figure 16As shown, at this time, the inner tube B8 is connected to the second central hole 20, and at the same time, the area enclosed by the outer tube B9 and the inner tube B8 is connected to the second vent hole 21. S4. The worker places the left end face of the second connecting plate 13 against the right end face of the first connecting plate 12, ensuring that the first flange hole 16 of the first connecting plate 12 is connected to the second flange hole 22 of the second connecting plate 13. Then, a screw 10 is inserted through the first flange hole 16 and the second flange hole 22, and a nut 11 is attached to the screw 10, thereby fixing the first connecting plate 12 and the second connecting plate 13 together. This ultimately connects the double-walled pipe A and the double-walled pipe B together. Figures 17-18 As shown, at this time, both the large-diameter sealing ring 25 and the small-diameter sealing ring 24 are pressed between the first connecting plate 12 and the second connecting plate 13.

[0022] S5. In use, one type of gas is introduced into the inner pipe A6. This type of gas sequentially passes through the inner pipe A6, the first central hole 14 of the first flange 1, the second central hole 20 of the second flange 2, and the inner pipe B8, finally flowing into the next device. Another type of gas is introduced into the outer pipe A7. The gas sequentially passes through the annular cavity between the inner pipe A6 and the outer pipe A7, the first vent 15, the second vent 21, and the annular cavity between the inner pipe B8 and the outer pipe B9, finally flowing into another device.

[0023] As can be seen from step S4, since the large-diameter sealing ring 25 seals the outside of the first vent 15, it effectively prevents the gas flowing through the first vent 15 from leaking to the outside through the gap between the first connecting plate 12 and the second connecting plate 13. Simultaneously, since the small-diameter sealing ring 24 seals between the first vent 15 and the first central hole 14, it effectively prevents the gas flowing through the first vent 15 from leaking into the inner tube A6 and inner tube B8. Therefore, this connecting assembly, compared to... Figures 1-7 The connector shown has a better sealing effect.

[0024] Furthermore, since the right end of the inner tube A6 is welded inside the first central hole 14 of the first connecting plate 12, it serves to support the inner tube A6. Similarly, since the right end of the outer tube A7 is welded into the first annular groove 17 of the first connecting plate 12, it also serves to support the outer tube A7. Therefore, after a period of use, the inner tube A6 and the outer tube A7 will not fall off the first connecting plate 12, unlike... Figures 1-7 The connector shown has the technical feature of a more robust connection.

Claims

1. A connection assembly for connecting double-walled pipes, characterized in that: It includes a first connecting plate (12) and a second connecting plate (13). The first connecting plate (12) has a first central hole (14) in the center. The first connecting plate (12) has a plurality of first vent holes (15) in the circumferential direction of the first central hole (14). The first connecting plate (12) has a plurality of first flange holes (16) outside the first vent holes (15) on its outer edge. The left end face of the first connecting plate (12) has a first annular groove (17) between the first flange hole (16) and the first vent hole (15). The right end face of the first connecting plate (12) has a large annular mounting groove (18) between the first vent hole (15) and the first flange hole (16). The right end face of the first connecting plate (12) has a small annular mounting groove (19) between the first vent hole (15) and the first central hole (14). The second connecting plate (13) has a second central hole (20) in the center, and a plurality of second vent holes (21) are provided in the second connecting plate (13) along the circumferential direction of the second central hole (20). A plurality of second flange holes (22) located outside the second vent holes (21) are provided on the outer edge of the second connecting plate (13). A second annular groove (23) located between the second vent holes (21) is provided on the right end face of the second connecting plate (13).

2. The connection assembly for connecting double-walled pipes according to claim 1, characterized in that: The outer diameter of the first connecting plate (12) is equal to the outer diameter of the second connecting plate (13).

3. The connection assembly for connecting double-walled pipes according to claim 1, characterized in that: The large annular mounting groove (18), small annular mounting groove (19) and the first central hole (14) of the first connecting plate (12) are coaxial, and the first annular slot (17) of the first connecting plate (12) is coaxial with the first central hole (14).

4. A connection assembly for connecting double-walled pipes according to claim 1, characterized in that: The second annular groove (23) of the second connecting plate (13) is coaxial with the second central hole (20).

5. A connection assembly for connecting double-walled pipes according to claim 1, characterized in that: The diameter of the first central hole (14) is equal to the diameter of the second central hole (20).

6. A connection assembly for connecting double-walled pipes according to claim 1, characterized in that: The diameter of the first central hole (14) is equal to the outer diameter of the inner tube A (6).

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