A connection structure of a heat-insulating oil pipe

Abstract

The application relates to a connecting structure of a heat-insulated oil pipe and belongs to the technical field of heat-insulated oil pipes, which comprises an oil pipe, the oil pipe comprises an outer pipe and an inner pipe, the inner pipe is located in the inner part of the outer pipe, a heat-insulated cavity is formed between the outer pipe and the inner pipe, aerogel is filled in the heat-insulated cavity, the end parts of two sections of the inner pipe are fixedly connected through a threaded connection assembly, the end parts of two sections of the outer pipe are provided with heat-insulated connecting sleeve pipes, and the two ends of the heat-insulated connecting sleeve pipes are fixedly provided with plug-in rings. The heat-insulated ring on the plug-in ring of the end part of the heat-insulated connecting sleeve pipe is tightly abutted against the end part of the outer pipe, heat transfer of the connecting gap of the outer pipe can be blocked, the flowability of hot oil in the inner pipe is prevented from being deteriorated, the gap at the connecting position of the two sections of the double-layer heat-insulated oil pipe can be sealed and filled, heat loss from the gap at the connecting position of the two sections of the double-layer heat-insulated oil pipe is prevented, the heat-insulating effect of the connected heat-insulated oil pipe is ensured, and the flowability of oil is prevented from being affected.

Description

Technical Field

[0001] This application relates to the technical field of heat-insulating oil pipes, and in particular to a connection structure for heat-insulating oil pipes. Background Technology

[0002] In the oil extraction process, insulated oil pipes play a crucial role, effectively reducing heat exchange between the fluid inside the pipe and the external environment, thus ensuring the efficiency and quality of oil extraction. However, existing insulated oil pipe connection structures are often quite complex, increasing installation difficulty and potentially leading to a decrease in insulation performance due to the excessive number of connecting components.

[0003] Existing insulated oil pipes have an unavoidable gap when the two sections are connected due to their double-layer insulation structure. This gap can easily lead to heat loss, resulting in poor flow of the internal hot oil and affecting the efficiency of oil extraction. Utility Model Content

[0004] The purpose of this application is to provide a connection structure for a heat-insulated oil pipe, which can seal and fill the gap at the connection between the two sections of a double-layer heat-insulated oil pipe, preventing heat loss from the gap and ensuring the heat insulation effect of the connected heat-insulated oil pipe. This avoids affecting the fluidity of the oil. It solves the problem that existing heat-insulated oil pipes, due to their double-layer heat insulation structure, inevitably have gaps at the connection between the two sections, which easily lead to heat loss, resulting in poor internal hot oil fluidity and affecting the efficiency of oil extraction.

[0005] The technical solution of the connection structure of the heat-insulating oil pipe provided in this application is as follows: A connection structure of the heat-insulating oil pipe includes an oil pipe, the oil pipe including an outer pipe and an inner pipe, the inner pipe being located inside the outer pipe, a heat-insulating cavity being formed between the outer pipe and the inner pipe, the heat-insulating cavity being filled with aerogel, the ends of the two sections of the inner pipe being fixedly connected by a threaded connection assembly, a thermally insulating connecting sleeve being provided between the ends of the two sections of the outer pipe, both ends of the thermally insulating connecting sleeve being fixedly provided with insertion rings, and a heat-insulating ring being fixedly provided near the end of the corresponding outer pipe of the insertion ring, the heat-insulating ring being tightly abutting against the end of the corresponding outer pipe.

[0006] By adopting the above technical solution, the heat insulation ring on the end plug ring of the thermal insulation connecting sleeve is tightly abutted against the end of the outer pipe, which can block the heat transfer of the outer pipe connection gap and prevent the hot oil inside the inner pipe from becoming less fluid. This achieves the goal of sealing and filling the gap at the connection between the two sections of the double-layer heat-insulated oil pipe, preventing heat from being lost from the gap at the connection between the two sections of the pipe, ensuring the heat insulation effect of the connected heat-insulated oil pipe, and avoiding affecting the fluidity of the oil.

[0007] Preferably, the threaded connection assembly includes an internally threaded tube and an externally threaded tube, which are respectively fixedly disposed at the ends of two interlocking internal tubes, and the inner wall of the internally threaded tube is threadedly connected to the outer surface of the externally threaded tube.

[0008] By adopting the above technical solution, the internal threaded tube and the external threaded tube of the threaded connection assembly are respectively fixed to the ends of the two mating inner tubes. The two inner tubes can be easily and stably connected by the threaded connection of the external threaded tube and the internal threaded tube.

[0009] Preferably, the threaded surfaces of both the internally threaded tube and the externally threaded tube are stepped threads, and the threaded surfaces of the internally threaded tube and the externally threaded tube are mutually compatible.

[0010] By adopting the above technical solution, the stepped thread of the internal threaded pipe and the external threaded pipe can increase the contact area of ​​the thread surface compared with ordinary thread, which can enhance the sealing of the threaded connection, avoid heat loss from the thread gap due to the failure of a single seal, and enhance the stability of the threaded connection assembly, prevent the connection from loosening and causing the gap to increase, maintain the tight connection of the inner pipe, and ensure the fluidity of hot oil and the extraction efficiency.

[0011] Preferably, two protective rings are fixedly provided at the end of the outer tube. The two protective rings are located on the inner and outer sides of the corresponding insertion ring, respectively. The insertion ring is inserted between the two protective rings, and the two protective rings are located on the inner and outer sides of the heat insulation ring, respectively.

[0012] By adopting the above technical solution, the two protective rings at the end of the outer tube are located on the inner and outer sides of the plug ring, respectively. This can play a role in positioning and protecting the plug ring and the heat insulation ring, preventing the plug ring from shifting during installation or use, ensuring the stability of the fit between the heat insulation ring and the outer tube, and thus ensuring that the heat insulation ring is always in close contact with the end of the outer tube. It can also prevent the heat insulation ring from directly contacting the external environment, avoiding damage to the heat insulation ring caused by the external environment, and improving the service life of the heat insulation ring.

[0013] Preferably, the outer edge of the externally threaded pipe is provided with a first step, and a first connecting ring is fixedly provided on the first step. The first connecting ring is inserted into the inner wall of the first sealing groove. The first sealing groove is opened at the end of the internally threaded pipe. A first sealing gasket is provided between the first connecting ring and the first sealing groove. The first connecting ring abuts against the first sealing gasket, and the first sealing gasket is fixedly provided in the inner wall of the first sealing groove.

[0014] By adopting the above technical solution, the first connecting ring on the first ladder of the external threaded pipe is inserted into the first sealing groove of the internal threaded pipe, and the first connecting ring abuts against the first sealing gasket in the first sealing groove, which can form a sealing structure at the end of the threaded connection assembly, preventing heat from being lost from the end gap of the internal threaded pipe and the external threaded pipe, while enhancing the sealing and stability of the connection between the two, avoiding insufficient sealing from aggravating heat loss, and preventing oil leakage during the extraction process.

[0015] Preferably, the inner edge of the internally threaded pipe is provided with a second step, and a second connecting ring is fixedly provided on the second step. The second connecting ring is inserted into the inner wall of the second sealing groove. The second sealing groove is opened at the end of the externally threaded pipe. A second sealing gasket is provided between the second connecting ring and the second sealing groove. The second connecting ring abuts against the second sealing gasket, and the second sealing gasket is fixedly provided in the inner wall of the second sealing groove.

[0016] By adopting the above technical solution, the second connecting ring on the second ladder of the internally threaded pipe is inserted into the second sealing groove of the externally threaded pipe, and the second connecting ring abuts against the second sealing gasket in the second sealing groove, which can form a sealing structure inside the threaded connection assembly, and form a double seal with the first sealing groove and the first sealing gasket, further improving the sealing performance of the inner pipe connection.

[0017] Preferably, the inner wall of the thermally insulating connecting sleeve is slidably connected to the outer surface of the end where the two inner tubes meet and the outer surface of the middle part of the internally threaded tube. The dimensions of the inner wall of the thermally insulating connecting sleeve are adapted to the dimensions of the outer surface of the end where the two inner tubes meet and the outer surface of the middle part of the internally threaded tube. The inner wall of the thermally insulating connecting sleeve is in close contact with the outer surface of the end where the two inner tubes meet and the outer surface of the middle part of the internally threaded tube.

[0018] By adopting the above technical solution, the inner wall of the middle part of the thermal insulation connecting sleeve is in close contact with the outer surface of the end of the two inner tubes and the outer surface of the middle part of the internal threaded tube. This allows for precise positioning of the thermal insulation connecting sleeve during installation, preventing misalignment of the thermal insulation connecting sleeve when connecting the two oil pipes. Furthermore, it ensures that the two protective rings at the end of the outer tube can be precisely fitted onto the outside of the corresponding plug ring and heat insulation ring for protection.

[0019] Preferably, a positioning ring is fixedly provided on the side of the heat insulation ring near the plug ring, the positioning ring is fixedly provided in the inner wall of the end of the plug ring, and the cross-sectional shape of the heat insulation ring and the positioning ring is I-shaped.

[0020] By adopting the above technical solution, the positioning ring is fixed to the inner wall of the end of the plug ring, and the heat insulation ring and the positioning ring form an I-shaped cross section, which can enhance the connection between the heat insulation ring and the plug ring, prevent the heat insulation ring from falling off or shifting, ensure that the heat insulation ring is continuously and tightly in contact with the end of the outer tube, and avoid gaps and heat loss at the connection of the outer tube due to the displacement of the heat insulation ring.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] This type of heat-insulated oil pipe connection structure, through the heat insulation ring on the end of the heat-insulating connecting sleeve and the end of the outer pipe, can block the heat transfer of the outer pipe connection gap, avoid the deterioration of the fluidity of the hot oil inside the inner pipe, and achieve the goal of sealing and filling the gap at the connection of the two sections of the double-layer heat-insulated oil pipe, preventing heat from being lost from the gap at the connection of the two sections of the pipe, ensuring the heat insulation effect of the connected heat-insulated oil pipe, and avoiding affecting the fluidity of the oil. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the front cross-sectional structure of this application;

[0025] Figure 3 This is a schematic diagram of the internally threaded pipe of this application;

[0026] Figure 4 This is a schematic diagram of the structure of the externally threaded pipe in this application;

[0027] Figure 5 This is an exploded view of a partial structure of this application.

[0028] In the picture:

[0029] 1. Oil pipe; 101. Outer pipe; 102. Inner pipe; 103. Insulation cavity; 2. Threaded connection assembly; 201. External threaded pipe; 202. Internal threaded pipe; 3. First platform; 4. Second platform; 5. First connecting ring; 6. Second connecting ring; 7. First sealing gasket; 8. Second sealing gasket; 9. First sealing groove; 10. Second sealing groove; 11. Thermal insulation connection sleeve; 12. Insertion ring; 13. Insulation ring; 14. Protective ring; 15. Positioning ring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 - Appendix Figure 5 This application will be described in further detail below.

[0031] Example 1: A connection structure for a heat-insulating oil pipe, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 5 The system includes an oil pipe 1, which includes an outer pipe 101 and an inner pipe 102. The inner pipe 102 is located inside the outer pipe 101. A heat insulation cavity 103 is formed between the outer pipe 101 and the inner pipe 102. The heat insulation cavity 103 is filled with aerogel. The ends of the two inner pipes 102 are fixedly connected by a threaded connection assembly 2. A thermal insulation connecting sleeve 11 is provided between the ends of the two outer pipes 101. A plug ring 12 is fixedly provided at both ends of the thermal insulation connecting sleeve 11. A heat insulation ring 13 is fixedly provided at the end of the plug ring 12 near the corresponding end of the outer pipe 101. The heat insulation ring 13 is tightly abutted against the end of the corresponding outer pipe 101.

[0032] Please see Figure 2 , Figure 3 and Figure 4 The threaded connection assembly 2 includes an internally threaded tube 202 and an externally threaded tube 201. The internally threaded tube 202 and the externally threaded tube 201 are respectively fixedly disposed at the ends of two interlocking inner tubes 102. The inner wall of the internally threaded tube 202 is threadedly connected to the outer surface of the externally threaded tube 201. The internally threaded tube 202 and the externally threaded tube 201 of the threaded connection assembly 2 are respectively fixed at the ends of the two interlocking inner tubes 102. The two inner tubes 102 can be easily and stably connected by the threaded connection of the externally threaded tube 201 and the internally threaded tube 202.

[0033] Please see Figure 2 , Figure 3 and Figure 4 Both the internal threaded pipe 202 and the external threaded pipe 201 have stepped threads. The threaded surfaces of the internal threaded pipe 202 and the external threaded pipe 201 are mutually compatible. Compared with ordinary threads, the compatible stepped threads of the internal threaded pipe 202 and the external threaded pipe 201 can increase the contact area of ​​the threaded surfaces, which can enhance the sealing of the threaded connection, prevent heat loss from the thread gap due to the failure of a single seal, and enhance the stability of the threaded connection component 2, prevent the connection from loosening and causing the gap to increase, maintain the tight connection of the inner pipe 102, and ensure the fluidity of hot oil and the extraction efficiency.

[0034] Please see Figure 2 , Figure 3 and Figure 4The outer edge of the external threaded pipe 201 is provided with a first step 3, and a first connecting ring 5 is fixedly installed on the first step 3. The first connecting ring 5 is inserted into the inner wall of the first sealing groove 9, which is located at the end of the internal threaded pipe 202. A first sealing gasket 7 is provided between the first connecting ring 5 and the first sealing groove 9. The first connecting ring 5 and the first sealing gasket 7 abut against each other and are fixedly installed in the inner wall of the first sealing groove 9. The first connecting ring 5 on the first step 3 of the external threaded pipe 201 is inserted into the first sealing groove 9 of the internal threaded pipe 202, and the first connecting ring 5 abuts against the first sealing gasket 7 in the first sealing groove 9. This can form a sealing structure at the end of the threaded connection assembly 2, preventing heat loss from the gap between the ends of the internal threaded pipe 202 and the external threaded pipe 201, while enhancing the sealing and stability of the connection between the two, avoiding insufficient sealing that could exacerbate heat loss, and preventing oil leakage during the extraction process.

[0035] Please see Figure 2 , Figure 3 and Figure 4 The inner edge of the internally threaded tube 202 is provided with a second step 4, and a second connecting ring 6 is fixedly installed on the second step 4. The second connecting ring 6 is inserted into the inner wall of the second sealing groove 10, which is located at the end of the externally threaded tube 201. A second sealing gasket 8 is provided between the second connecting ring 6 and the second sealing groove 10. The second connecting ring 6 and the second sealing gasket 8 abut against each other. The second sealing gasket 8 is fixedly installed in the inner wall of the second sealing groove 10. The second connecting ring 6 on the second step 4 of the internally threaded tube 202 is inserted into the second sealing groove 10 of the externally threaded tube 201, and the second connecting ring 6 abuts against the second sealing gasket 8 in the second sealing groove 10. This can form a sealing structure inside the threaded connection assembly 2, and together with the first sealing groove 9 and the first sealing gasket 7, form a double seal, further improving the sealing performance of the connection of the inner tube 102.

[0036] Please see Figure 2 and Figure 5 A positioning ring 15 is fixedly installed on the side of the heat insulation ring 13 near the plug-in ring 12. The positioning ring 15 is fixedly installed in the inner wall of the end of the plug-in ring 12. The heat insulation ring 13 and the positioning ring 15 have an I-shaped cross-section. The positioning ring 15 is fixed to the inner wall of the end of the plug-in ring 12, and the heat insulation ring 13 and the positioning ring 15 form an I-shaped cross-section, which can enhance the connection between the heat insulation ring 13 and the plug-in ring 12, prevent the heat insulation ring 13 from falling off or shifting, and ensure that the heat insulation ring 13 is continuously in close contact with the end of the outer tube 101, so as to avoid gaps and heat loss at the connection of the outer tube 101 due to the displacement of the heat insulation ring 13.

[0037] Example 2: A connection structure for a heat-insulating oil pipe, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 5Two protective rings 14 are fixedly installed at the end of the outer tube 101. The two protective rings 14 are located on the inner and outer sides of the corresponding plug-in ring 12, respectively. The plug-in ring 12 is inserted between the two protective rings 14. The two protective rings 14 are located on the inner and outer sides of the heat insulation ring 13, respectively. The two protective rings 14 at the end of the outer tube 101 are located on the inner and outer sides of the plug-in ring 12, respectively. They can play a positioning and protection role for the plug-in ring 12 and the heat insulation ring 13, prevent the plug-in ring 12 from shifting during installation or use, ensure the stability of the fit between the heat insulation ring 13 and the outer tube 101, and thus ensure that the heat insulation ring 13 is always in tight contact with the end of the outer tube 101. They can also prevent the heat insulation ring 13 from directly contacting the external environment, avoid damage to the heat insulation ring 13 caused by the external environment, and improve the service life of the heat insulation ring 13.

[0038] Please see Figure 2 The inner wall of the thermal insulation connecting sleeve 11 is slidably connected to the outer surface of the end where the two inner tubes 102 are joined and the outer surface of the inner threaded tube 202. The dimensions of the inner wall of the thermal insulation connecting sleeve 11 are adapted to the dimensions of the outer surface of the end where the two inner tubes 102 are joined and the outer surface of the inner threaded tube 202. The inner wall of the thermal insulation connecting sleeve 11 is in close contact with the outer surface of the end where the two inner tubes 102 are joined and the outer surface of the inner threaded tube 202. The close contact between the inner wall of the thermal insulation connecting sleeve 11 and the outer surface of the end where the two inner tubes 102 are joined and the outer surface of the inner threaded tube 202 allows for precise positioning of the thermal insulation connecting sleeve 11 during installation. This prevents the thermal insulation connecting sleeve 11 from shifting when the two oil pipes 1 are joined, and allows the two protective rings 14 at the end of the outer tube 101 to be precisely fitted onto the outside of the corresponding plug ring 12 and heat insulation ring 13 for protection.

[0039] The implementation principle of this application embodiment is as follows: When connecting two sections of oil pipe 1, the thermal insulation connecting sleeve 11 is slidably fitted onto the outer surface of the internal threaded pipe 202 and the end of one section of the inner pipe 102. The thermal insulation connecting sleeve 11 will drive the insertion ring 12 and the heat insulation ring 13 to be inserted between the two protective rings 14 at the end of the corresponding outer pipe 101 of the inner pipe 102, so that the heat insulation ring 13 is tightly abutted against the end of the outer pipe 101. The other section of the inner pipe 102 is connected through the threaded connection assembly 2, so that the external threaded pipe 201 is gradually threaded into the inner wall of the internal threaded pipe 202. Then, the corresponding outer pipe 101 of the inner pipe 102 gradually moves towards the thermal insulation connecting sleeve 11 until the two protective rings 14 at the end of the outer pipe 101 are slidably fitted into the corresponding insertion ring 12 and heat insulation ring 13, and the end of the outer pipe 101 abuts against the corresponding heat insulation ring 13. The two outer tubes 101 are pressed together by the thermal insulation connecting sleeve 11, so that the two heat insulation rings 13 at both ends of the thermal insulation connecting sleeve 11 are tightly abutted against the ends of the two outer tubes 101. At the same time, during the threaded connection between the external threaded tube 201 and the internal threaded tube 202, the external threaded tube 201 will move the first connecting ring 5 into the first sealing groove 9 at the end of the internal threaded tube 202 through the movement of the first step 3, so that the first connecting ring 5 is inserted into the interior of the first sealing groove 9 and tightly abutted against the first sealing gasket 7, sealing the end between the first step 3 and the end of the internal threaded tube 202. During the threaded connection between the external threaded tube 201 and the internal threaded tube 202, the second connecting ring 6 will also be inserted into the second sealing groove 10 and tightly abutted against the second sealing gasket 8, sealing the end between the second step 4 and the end of the external threaded tube 201.

Claims

1. A connection structure of an insulated oil pipe comprising an oil pipe (1), characterized by: The oil pipe (1) includes an outer pipe (101) and an inner pipe (102). The inner pipe (102) is located inside the outer pipe (101). A heat insulation cavity (103) is formed between the outer pipe (101) and the inner pipe (102). The heat insulation cavity (103) is filled with aerogel. The ends of the two sections of the inner pipe (102) are fixedly connected by a threaded connection assembly (2). A thermal insulation connecting sleeve (11) is provided between the ends of the two sections of the outer pipe (101). Both ends of the thermal insulation connecting sleeve (11) are fixedly provided with plug rings (12). A heat insulation ring (13) is fixedly provided near the end of the corresponding outer pipe (101) of the plug ring (12). The heat insulation ring (13) is tightly abutted against the end of the corresponding outer pipe (101).

2. The connection structure of the heat-insulated oil pipe according to claim 1, wherein: The threaded connection assembly (2) includes an internal threaded tube (202) and an external threaded tube (201). The internal threaded tube (202) and the external threaded tube (201) are respectively fixedly disposed at the ends of two interlocking internal tubes (102). The inner wall of the internal threaded tube (202) is threadedly connected to the outer surface of the external threaded tube (201).

3. The connection structure of the heat-insulated oil pipe according to claim 2, characterized in that: The threaded surfaces of the internally threaded tube (202) and the externally threaded tube (201) are both stepped threads, and the threaded surfaces of the internally threaded tube (202) and the externally threaded tube (201) are mutually compatible.

4. The connection structure of the heat-insulated oil pipe according to claim 1, characterized in that: The outer tube (101) has two protective rings (14) fixedly installed at its end. The two protective rings (14) are located on the inner and outer sides of the corresponding plug ring (12), respectively. The plug ring (12) is inserted between the two protective rings (14), and the two protective rings (14) are located on the inner and outer sides of the heat insulation ring (13), respectively.

5. The connection structure of the heat insulated oil tube according to claim 2, characterized in that: The outer edge of the external threaded pipe (201) is provided with a first step (3), and a first connecting ring (5) is fixedly provided on the first step (3). The first connecting ring (5) is inserted into the inner wall of the first sealing groove (9). The first sealing groove (9) is opened at the end of the internal threaded pipe (202). A first sealing gasket (7) is provided between the first connecting ring (5) and the first sealing groove (9). The first connecting ring (5) and the first sealing gasket (7) abut against each other. The first sealing gasket (7) is fixedly provided in the inner wall of the first sealing groove (9).

6. The connection structure of the heat insulated oil tube according to claim 2, characterized in that: The inner edge of the internally threaded tube (202) is provided with a second step (4), and a second connecting ring (6) is fixedly provided on the second step (4). The second connecting ring (6) is inserted into the inner wall of the second sealing groove (10). The second sealing groove (10) is opened at the end of the externally threaded tube (201). A second sealing gasket (8) is provided between the second connecting ring (6) and the second sealing groove (10). The second connecting ring (6) and the second sealing gasket (8) abut against each other. The second sealing gasket (8) is fixedly provided in the inner wall of the second sealing groove (10).

7. The connection structure of the heat-insulated oil tube according to claim 1, characterized in that: The inner wall of the thermal insulation connecting sleeve (11) is slidably connected to the outer surface of the end where the two inner tubes (102) meet and the outer surface of the inner threaded tube (202). The size of the inner wall of the thermal insulation connecting sleeve (11) is adapted to the size of the outer surface of the end where the two inner tubes (102) meet and the outer surface of the inner threaded tube (202). The inner wall of the thermal insulation connecting sleeve (11) is in close contact with the outer surface of the end where the two inner tubes (102) meet and the outer surface of the inner threaded tube (202).

8. The connection structure of a heat-insulating oil pipe according to claim 1, characterized in that: A positioning ring (15) is fixedly provided on the side of the heat insulation ring (13) near the plug ring (12). The positioning ring (15) is fixedly provided in the inner wall of the end of the plug ring (12). The cross-sectional shape of the heat insulation ring (13) and the positioning ring (15) is I-shaped.

Images