High pressure double wall pipe structure

Abstract

The utility model relates to double -walled pipe technical field discloses a high pressure double -walled pipe structure, including inner tube, outer tube and fixed in the double -walled pipe support structure between inner tube and outer tube, and the inner tube is connected fixed through double -walled pipe support structure between the outer tube, and the double -walled pipe support structure includes two groups of connecting flange and connecting pipe structure, and each group of connecting flange is connected and fixed with connecting pipe, and the connecting pipe is in the sleeve inner tube, and the outer tube is connected on the connecting flange. The device is connected and fixed through double -walled pipe support structure each connecting point, is connected through the connecting flange in double -walled pipe support structure, and the inner tube is fixed through the connecting pipe, and the outer tube is connected half pipe and is connected through the connecting flange, and the whole device structure is good in compression resistance, and the stability is strong, and the equipment use safety is higher. The welding ring is arranged in the connecting flange of the device, and the welding of the welding fixed sleeve is convenient in the device installation process, improves the stability of the structure of assembly completion.

Description

Technical Field

[0001] This utility model relates to the field of double-walled tubes, and in particular to a high-pressure double-walled tube structure. Background Technology

[0002] During the installation of double-walled pipes, due to the special structure of double-walled pipes, each pipe section needs to be cut into pieces in the workshop according to the design drawings before being transported to the site for segmented connection. The installation is carried out in sections according to the designed welding points, and the support structure set up at each connection point is connected and fixed. The compressive strength and structural stability of the double-walled pipes are particularly important during use, as they affect the service life of the overall device.

[0003] Patent application CN 206246877U discloses a double-walled pipe flange, a connecting flange, and a double-walled pipe. The double-walled pipe flange includes a flange body with a central through hole, a plurality of radially equally distributed ventilation holes around the central through hole, and a plurality of radially equally distributed bolt holes around the ventilation holes. An annular protrusion is also provided on one flange surface of the flange body, with the edge of the annular protrusion for connecting an outer pipe located between the ventilation holes and the bolt holes. The connecting flange includes a first flange and a second flange coaxially fitted together; the first flange and the second flange are the aforementioned double-walled pipe flanges, and the first flange and the second flange are connected by bolts. The double-walled pipe includes an outer pipe and an inner pipe coaxially fitted together, and also includes the aforementioned connecting flange.

[0004] The existing technology uses a flange to directly fix the inner and outer pipes together at the weld joint, and the stability of the connection needs to be enhanced.

[0005] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to provide a high-pressure double-walled pipe structure. The device connects and fixes each connection point through the double-walled pipe support structure. The inner pipe is fixed through the connecting pipe by the connecting flange in the double-walled pipe support structure, and the outer pipe is connected to the connecting flange through the outer pipe connecting half pipe. The overall device structure has good pressure resistance, strong stability, and higher equipment safety.

[0007] The technical solution adopted in this utility model is:

[0008] The high-pressure double-walled pipe structure includes an inner pipe, an outer pipe, and a double-walled pipe support structure fixed between the inner and outer pipes. The inner and outer pipes are connected and fixed through the double-walled pipe support structure. The double-walled pipe support structure includes two sets of connecting flanges and connecting pipe structures. Each set of connecting flanges is connected and fixed to the connecting pipe. The inner pipe is installed inside the connecting pipe, and the outer pipe is connected to the connecting flange.

[0009] By adopting the above structure, the device connects and fixes each connection point through the double-walled pipe support structure, connects through the connecting flange in the double-walled pipe support structure, fixes the inner pipe through the connecting pipe, and connects the outer pipe to the connecting flange through the outer pipe connecting half pipe. The overall device structure has good pressure resistance, strong stability, and higher equipment safety.

[0010] Preferably, the connecting flange is welded to the connecting pipe, and a welding ring is provided on the outside of the welding point between the connecting flange and the connecting pipe. The welding ring is stepped and is attached to the port of the connection between the connecting pipe and the connecting flange.

[0011] By adopting the above structure and setting a welding ring on the connecting flange, it is easier to weld and fix the welding sleeve during the installation process, thereby improving the stability of the assembled structure.

[0012] Preferably, a welding fixing sleeve is fitted onto the connecting pipe, and the welding fixing sleeve is welded and fixed to the welding ring. The welding fixing sleeve is located in the middle of the connecting pipe.

[0013] By adopting the above structure and setting a welding fixing sleeve, the connection between the connecting flange and the external pipe connecting half-pipe is strengthened, thereby enhancing the stability of the external pipe installation.

[0014] Preferably, the two sets of connecting flanges are fixed by welding, and a sealing ring is provided on the contact surface of the two sets of connecting flanges.

[0015] Preferably, both sets of connecting flanges are fitted onto the connecting pipe and welded to the connecting pipe, and the connecting pipe openings of the two sets of connecting pipes are located inside the connecting flanges and are installed close to each other.

[0016] By adopting the above structure, the flanges are fixedly connected by welding, resulting in a tighter connection. In addition, the sealing ring enhances the sealing effect during use.

[0017] Preferably, the inner tube is fitted inside the connecting tube, and the inner tube is welded and fixed to the connecting tube.

[0018] By adopting the above structure, the structure becomes more stable after the inner tube is fixed.

[0019] Preferably, a set of outer pipe connecting half-pipes is provided between the connecting flange and the outer pipe. A welding plate is provided inside one side of the outer pipe connecting half-pipe. The outer pipe connecting half-pipe is sleeved outside the welding fixing sleeve. One end is fixedly connected to the connecting flange, and the other end is fixedly connected to the outer pipe. The welding plate is welded and fixed to the inner welding fixing sleeve.

[0020] By adopting the above structure, with the outer pipe connected to the half-pipe, the installation and welding of the outer pipe is more secure and the welding operation is more convenient.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] 1. The device of this utility model uses a double-walled tube support structure to connect and fix each connection point. The inner tube is fixed by the connecting flange in the double-walled tube support structure, and the outer tube is connected to the connecting flange by the connecting half tube. The overall device structure has good pressure resistance, strong stability, and higher safety in equipment use.

[0023] 2. The connecting flange of this utility model is provided with a welding ring, which facilitates the welding and fixing of the welding fixing sleeve during the installation process and improves the stability of the assembled structure.

[0024] 3. The device of this utility model is equipped with a welding fixing sleeve to strengthen the connection between the connecting flange and the external pipe connecting half pipe, enhance the stability of the external pipe installation, and with the external pipe connecting half pipe, the external pipe installation and welding are more secure and the welding operation is more convenient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the double-walled tube support structure and the connecting half-pipe of the outer tube of this utility model;

[0027] Figure 3 This is a schematic diagram showing the position of the welding fixing sleeve of this utility model;

[0028] Figure 4 This is a schematic diagram of the double-walled tube support structure of this utility model;

[0029] Figure 5 This is a schematic diagram of the outer tube connecting to the half-tube of this utility model.

[0030] The components are: 1. Inner pipe; 2. Outer pipe; 3. Double-walled pipe support structure; 4. Connecting pipe; 5. Welded fixing sleeve; 6. Welding ring; 7. Sealing ring; 8. Connecting pipe port; 9. Connecting flange; 10. Outer pipe connecting half pipe; 11. Welding plate. Detailed Implementation

[0031] like Figure 1-5 As shown, the high-pressure double-walled pipe structure includes an inner pipe 1, an outer pipe 2, and a double-walled pipe support structure 3 fixed between the inner pipe 1 and the outer pipe 2. The inner pipe 1 and the outer pipe 2 are connected and fixed through the double-walled pipe support structure 3. The double-walled pipe support structure 3 includes two sets of connecting flanges 9 and connecting pipes 4. Each set of connecting flanges 9 is connected and fixed to the connecting pipe 4. The inner pipe 1 is fitted inside the connecting pipe 4, and the outer pipe 2 is connected to the connecting flange 9. The device connects and fixes each connection point through the double-walled pipe support structure. The inner pipe 1 is fixed through the connecting pipe 4, and the outer pipe 2 is connected to the connecting flange 9 through the outer pipe connecting half-pipe 10. The overall device structure has good pressure resistance, strong stability, and higher equipment safety.

[0032] The connecting flange 9 is welded and fixed to the connecting pipe 4. A stepped welding ring 6 is provided around the weld joint between the connecting flange 9 and the connecting pipe 4, and is attached to the port of the connection between the connecting pipe 4 and the connecting flange 9. A welding fixing sleeve 5 is fitted onto the connecting pipe 4 and welded and fixed to the welding ring 6. The welding fixing sleeve 5 is located in the middle of the connecting pipe 4. The welding ring 6 on the connecting flange facilitates the welding and fixing of the welding fixing sleeve 5 during device installation, improving the stability of the assembled structure. The welding fixing sleeve 5 strengthens the connection between the connecting flange 9 and the external connecting half-pipe 10, enhancing the stability of the external pipe 2 installation.

[0033] Two sets of connecting flanges 9 are fixed together by welding, and a sealing ring 7 is provided on the mating surfaces of the two sets of connecting flanges 9. The connecting flanges 9 are fixed together by welding, resulting in a tighter connection, and the sealing ring 7 enhances the sealing effect during use.

[0034] Both sets of connecting flanges 9 are sleeved on the connecting pipe 4 and welded to the connecting pipe 4. The connecting pipe ports 8 of the two sets of connecting pipes 4 are located inside the connecting flanges 9 and are installed close to each other.

[0035] The inner tube 1 is fitted inside the connecting tube 4, and the inner tube 1 is welded and fixed to the connecting tube 4. After the inner tube 1 is fixed, the structure is more stable.

[0036] A set of outer pipe connecting half-pipes 10 is provided between the connecting flange 9 and the outer pipe 2. A welding plate 11 is installed inside one side of the outer pipe connecting half-pipe 10. The outer pipe connecting half-pipe 10 is sleeved on the welding fixing sleeve 5. One end is fixedly connected to the connecting flange 9, and the other end is fixedly connected to the outer pipe 2. The welding plate 11 is welded and fixed to the inner welding fixing sleeve 5. With the outer pipe connecting half-pipes 10, the installation and welding of the outer pipe 2 is more secure and the welding operation is more convenient.

[0037] Before using this device, each pipe section needs to be cut according to the design drawings and then transported to the site for segmented connection. First, the double-walled pipe support structure 3 is positioned on the inner pipe 1, and the connecting pipe 4 is welded to the inner pipe 1. After welding, the welding ring 6 is welded to the welding fixing sleeve 5. Then, the outer pipe connecting half pipe 10 is assembled and welded. Finally, the outer pipe 2 is welded. After the overall structure is assembled and welded, it has good compressive strength, strong stability, and higher safety in equipment use.

[0038] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should be included within the scope of protection defined by the claims of the present utility model.

Claims

1. A high-pressure double-walled pipe structure, comprising an inner pipe, an outer pipe, and a double-walled pipe support structure fixed between the inner and outer pipes, characterized in that: The inner tube and the outer tube are connected and fixed by a double-walled tube support structure. The double-walled tube support structure includes two sets of connecting flanges and connecting pipe structures. Each set of connecting flanges and connecting pipes are connected and fixed. The inner tube is installed inside the connecting pipe, and the outer tube is connected to the connecting flange.

2. The high-pressure double-walled tube structure according to claim 1, characterized in that: The connecting flange is welded and fixed to the connecting pipe. A welding ring is provided on the outside of the welding point between the connecting flange and the connecting pipe. The welding ring is stepped and is attached to the port of the connection between the connecting pipe and the connecting flange.

3. The high-pressure double-walled tube structure according to claim 2, characterized in that: A welding fixing sleeve is fitted onto the connecting pipe, and the welding fixing sleeve is welded and fixed to the welding ring. The welding fixing sleeve is located in the middle of the connecting pipe.

4. The high-pressure double-walled tube structure according to claim 1, characterized in that: The two sets of connecting flanges are fixed by welding, and a sealing ring is provided on the contact surface of the two sets of connecting flanges.

5. The high-pressure double-walled tube structure according to claim 1, characterized in that: Both sets of connecting flanges are fitted onto the connecting pipe and welded to the connecting pipe. The connecting pipe openings of the two sets of connecting pipes are located inside the connecting flanges and are installed close to each other.

6. The high-pressure double-walled tube structure according to claim 1, characterized in that: The inner tube is fitted inside the connecting tube, and the inner tube is welded and fixed to the connecting tube.

7. The high-pressure double-walled tube structure according to claim 1, characterized in that: A set of outer pipe connecting half-pipes is provided between the connecting flange and the outer pipe. A welding plate is provided inside one side of the outer pipe connecting half-pipe. The outer pipe connecting half-pipe is sleeved outside the welding fixing sleeve. One end is fixedly connected to the connecting flange, and the other end is fixedly connected to the outer pipe. The welding plate is welded and fixed to the inner welding fixing sleeve.

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