A high-temperature protective welding joint for flexible lined trenchless pipeline repair

Abstract

The present invention relates to the technical field of lined trenchless pipe repair connection, and in particular to a high-temperature protective welding joint for flexible lined trenchless pipe repair, comprising a first interface end and a second interface end, wherein the first interface end is used to fix the connection to the left section outer pipe, and the second interface end is used to fix the connection to the right section outer pipe to be repaired, and the second interface end is provided with a lining hose that is sleeved in the right section outer pipe to be repaired, and further comprising: a first flange fixedly sleeved on the first interface end; a second flange fixedly sleeved on the second interface end; an embedded annular cavity is opened in the second interface end, and the embedded annular cavity is used to embed the lining hose through one end of the right section outer pipe to be repaired. The present invention sets a corresponding first interface end and a second interface end, respectively connecting the complete left section outer pipe and the damaged right section outer pipe to be repaired, and uses the current in the automatic heat dissipation group to drive the heat exhaust machine attached to the second interface end to operate, so as to accelerate the diffusion of high-temperature heat at the welding point.

Description

Technical Field

[0001] The invention relates to the technical field of lined trenchless pipeline repair and connection, and in particular to a high-temperature protection welding joint for repairing a flexible lined trenchless pipeline. Background Art

[0002] Flexible lined trenchless pipeline repair, especially the repair construction that requires the use of welded joints. Such as thermal pipelines and gas pipelines. Flexible lined trenchless pipeline repair construction requires the installation of special joints at both ends of the pipeline to connect with the hose and form a seal. There are three types of traditional joints. The first is the flange connection joint, which is also divided into two parts: the outer sleeve and the core pipe. When the two are installed, the adjacent flanges are connected together by bolts. However, thermal pipelines and gas pipelines require the use of flangeless joints and must be welded; the second is the glue injection repair joint, which is divided into two parts: the outer sleeve and the core pipe. The two need to be welded together during installation, but the high temperature generated during welding will damage the liner pipe, resulting in the inability to form a seal.

[0003] The third type is a welded repair joint, consisting of two parts: an outer sleeve and a core pipe, which need to be welded together during installation. For example, the welded, trenchless joint for flexible composite pipes disclosed in Publication No. CN215488143U uses an expansion structure formed by a joint expansion ring and an inner liner, combined with a welded seal, to achieve a sealed connection between the non-metallic flexible pipe and the original pipe, eliminating the need for flange connections. However, when the original pipe is partially damaged, replacing the entire pipe can easily lead to resource waste and increase equipment acquisition costs. While concentric hose-set repair methods are currently available, these only achieve a butt joint between the original pipe and the hose, lacking connection stability and easily affecting the smoothness of the pipe structure due to structural wrinkles. Furthermore, the high temperature generated during welding is rapidly transmitted through the metal joint, easily causing burns and damaging the inner liner hose, causing it to rapidly shrink and deform when heated, or even structurally break, affecting the connection strength and integrity of the hose to the joint and thus failing to achieve a complete seal. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the thin bevel part of the hood workpiece affects the structural strength and sealing effect, and to propose a high-temperature protective welding joint for flexible lined trenchless pipeline repair.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-temperature protective welding joint for flexible lined trenchless pipeline repair, comprising a first interface end and a second interface end, wherein the first interface end is used to fixedly connect to the left section outer pipe, and the second interface end is used to fixedly connect to the right section outer pipe to be repaired, and the second interface end is provided with a lining hose sleeved in the right section outer pipe to be repaired, and further comprising:

[0007] a first flange, wherein the first flange is fixedly sleeved on the first interface end;

[0008] a second flange, the second flange being fixedly sleeved on the second interface end;

[0009] An embedded annular cavity is provided in the second interface end and is used for embedding an inner lining hose penetrating one end of the outer pipe of the right section to be repaired;

[0010] A locking portion, the locking portion being used to threadably connect the first interface end and the second interface end, and the locking portion being located at one end of the second interface end by embedding the annular cavity reinforcement lining hose;

[0011] The double heat dissipation part, wherein the first flange and the second flange are butt-jointed and assembled to form a welding point for welding the first interface end and the second interface end, and the double heat dissipation part dissipates heat twice for the first interface end and the second interface end through the welding point.

[0012] Preferably, the left section outer tube is connected to the end of the first interface end away from the second interface end, the right section outer tube to be repaired is connected to the end of the second interface end away from the first interface end, and the lining hose passes through the right section outer tube to be repaired and extends into the second interface end.

[0013] Preferably, the embedded ring cavity is a funnel-shaped structure opened in one end of the second interface end toward the first interface end, and the embedded ring cavity is wider on the left and narrower on the right.

[0014] Preferably, the locking portion comprises:

[0015] A threaded connection assembly, the threaded connection assembly being used for preliminary assembly of the first interface end and the second interface end;

[0016] A reinforcement assembly is used to reinforce the connection between the lining hose and the embedded ring cavity in the second interface end.

[0017] Preferably, the dual heat dissipation unit includes:

[0018] a left docking tool, the left docking tool being arranged on the first flange;

[0019] a right docking tool, the right docking tool being arranged on the second flange and the second interface end;

[0020] The heat drive and cooling tooling is arranged between the left docking tooling and the right docking tooling.

[0021] Preferably, the welding points are provided with alloy welding rods which are sleeved inside the first flange and on the second interface end by means of a left butt joint tool and a right butt joint tool.

[0022] Preferably, the second interface end is away from the end of the right section outer pipe to be repaired and extends into the first flange through the left docking tool and the right docking tool.

[0023] Preferably, the alloy welding rod is sleeved on one end of the second interface end located inside the first flange.

[0024] Preferably, the number of the heat drive and cooling tooling is four groups, and the four groups of the heat drive and cooling tooling are equidistantly distributed between the first flange and the second flange in the circumferential direction.

[0025] Preferably, one end of the heat drive cooling tooling contacts the welding point through a first flange.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The present invention sets corresponding first and second interface ends, which respectively connect the left section outer tube of the complete structure and the damaged right section outer tube to be repaired. A funnel-shaped embedded annular cavity is opened in the second interface end to connect the lining hose to thicken and repair the right section outer tube to be repaired.

[0028] 2. The present invention utilizes external threads and internal threads to preliminarily connect the first interface end and the second interface end. A wedge-driven piston member driven by pressure from the second interface end is provided in the first interface end, so that the elastic wedge driven piston member compacts and seals the outer wall of the embedded annular cavity to ensure the firm connection between the second interface end and the lining hose.

[0029] 3. The present invention provides concentrically distributed docking ring cavities and relief ring grooves in the first circular ring, and utilizes the limiting ring grooves, inlet and outlet through holes and welding long holes to set up an alloy welding rod sleeved on the second interface end, so as to provide an operating position for welding between the first interface end and the second interface end.

[0030] 4. The present invention provides a water pipe group and a water storage chamber connected between the second interface end and the second flange to facilitate water cooling protection of the lining hose located in the second interface end, while creating a relatively low temperature condition for the right end of the automatic heat dissipation group installed, and continuously heating the left end of the automatic heat dissipation group by welding to meet the conditions for the occurrence of the Seebeck effect.

[0031] 5. The present invention sets a first metal strip and a second metal strip to form a closed circuit based on the Seebeck effect, uses the current in the automatic heat dissipation group to drive the heat dissipation machine attached to the second interface end to operate, and drives the high and low temperature coolant in the long meandering tube through a circulating pump to achieve alternating cooling, so as to cool the second interface end near the welding point, and also cool the second interface end of the built-in water pipe group. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a high-temperature protective welding joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0033] Figure 2 A cross-sectional view of a high-temperature protective welded joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0034] Figure 3 This is a schematic diagram of the explosion state of a high-temperature protection welded joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0035] Figure 4 A cross-sectional view of an explosion state of a high-temperature protection welded joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0036] Figure 5 A cross-sectional view of a first interface end and a first flange structure of a high-temperature protection weld joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0037] Figure 6 This is an enlarged schematic diagram of the structure of part A of a high-temperature protection welded joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0038] Figure 7 This is a schematic diagram of the first flange and left butt joint tooling structure of a high-temperature protection welding joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0039] Figure 8 This is a cross-sectional view of the first flange and left butt joint tooling structure of a high-temperature protection welding joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0040] Figure 9 This is a cross-sectional view of the second interface end structure of a high-temperature protection weld joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0041] Figure 10 This is a schematic diagram of the second flange and right butt joint tooling structure of a high-temperature protection welded joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0042] Figure 11 This is a cross-sectional view of the second flange and right butt joint tooling structure of a high-temperature protection welded joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0043] Figure 12 This is a schematic structural diagram of a water pipe assembly with high-temperature protective welded joints for flexible lined trenchless pipeline repair proposed by the present invention;

[0044] Figure 13 This is a schematic diagram of the distribution state of an automatic heat dissipation group of a high-temperature protection welding joint for flexible lined trenchless pipeline repair proposed by the present invention;

[0045] Figure 14 This is a schematic diagram of the structure of an automatic heat dissipation group for high-temperature protection welding joints for flexible lined trenchless pipeline repair proposed by the present invention;

[0046] Figure 15 This is a front cross-sectional view of a heat removal machine structure for high-temperature protective welded joints used for flexible lined trenchless pipeline repair proposed by the present invention;

[0047] Figure 16 A side sectional view of a heat removal machine structure for high-temperature protective welded joints for repairing flexible lined trenchless pipelines proposed by the present invention;

[0048] Figure 17 This is a schematic diagram of the forming state of an alloy welding rod for high-temperature protective welding joints for flexible lined trenchless pipeline repair proposed by the present invention.

[0049] In the picture:

[0050] 1. First interface end; 2. Second interface end;

[0051] 3. First flange; 31. First ring; 32. Docking ring cavity; 33. Giving ring groove; 34. Limiting outer groove; 35. Inlet and outlet through hole; 36. Welding slot;

[0052] 4. Second flange; 41. Second ring; 42. Accommodating ring groove; 43. Limiting inner groove;

[0053] 5. Embedded ring cavity;

[0054] 6. Locking portion; 61. External thread; 62. Internal thread; 63. Top notch; 64. Right-angle sealing long cavity; 65. Wedge-head driving piston; 66. Elastic wedge-head driven piston;

[0055] 7. Double heat dissipation unit;

[0056] 71. Water pipe group; 711. Equidistant pipe; 712. Expanded pipe;

[0057] 72. Water storage chamber;

[0058] 73. Automatic heat dissipation assembly; 731. First mounting hole; 732. Second mounting hole; 733. First metal strip; 734. Second metal strip; 735. First set of components; 736. Second set of components;

[0059] 737. Heat exhaust machine; 7371. Hollow arc plate; 7372. Heat exhaust arc hole; 7373. Long circular tube; 7374. Circulation pump; 7375. Aluminum foil heat conductor. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0061] Reference Figures 1-17 , a high-temperature protective welding joint for flexible lined trenchless pipe repair, including a first interface end 1 and a second interface end 2, the first interface end 1 is used to fix the connection to the left section outer pipe, the second interface end 2 is used to fix the connection to the right section outer pipe to be repaired, and the second interface end 2 is provided with a lining hose that is sleeved in the right section outer pipe to be repaired, and also includes a first flange 3, a second flange 4, an embedded annular cavity 5, a locking portion 6, and a double heat dissipation portion 7. It should be noted that the lining hose is used to repair the right section outer pipe to be repaired with structural damage, that is, a section of lining hose greater than its own length is sleeved in the right section outer pipe to be repaired, and one end of the lining hose extending out of the right section outer pipe to be repaired is fixed to the second interface end 2, and then the first interface end 1 and the second interface end 2 are assembled and connected to realize the assembly connection of the left section outer pipe and the right section outer pipe to be repaired.

[0062] The first flange 3 is fixedly mounted on the first interface end 1 , and the second flange 4 is fixedly mounted on the second interface end 2 . It should be noted that the first flange 3 and the second flange 4 are concentrically mounted.

[0063] The embedded annular cavity 5 is opened in the second interface end 2, and the embedded annular cavity 5 is used to embed the lining hose through one end of the outer tube of the right section to be repaired. The embedded annular cavity 5 is a funnel-shaped structure opened in one end of the second interface end 2 toward the first interface end 1, and the embedded annular cavity 5 is wide on the left and narrow on the right. For details, please refer to the attached manual. Figure 2 , Attachment Figure 4 , Attachment Figure 9 By opening an expandable embedded ring cavity 5 and sheathing one end of the lining hose, the lining hose is kept in a tight state in the second interface end 2, and then the lining hose in the tight state is fixed, which helps to improve the stability of the connection installation.

[0064] The locking portion 6 is used to threadably connect the first interface end 1 and the second interface end 2, and the locking portion 6 is embedded in the annular cavity 5 to reinforce the end of the lining hose located in the second interface end 2. Figure 2 -Attached Figure 6 , the locking portion 6 includes a threaded connection assembly and a reinforcement assembly:

[0065] The threaded connection assembly is used for preliminary assembly of the first interface end 1 and the second interface end 2 , and the threaded connection assembly includes an external thread 61 and an internal thread 62 .

[0066] The external thread 61 is opened on the outer wall of the first interface end 1, and the internal thread 62 is opened on the inner wall of the second interface end 2, and the internal thread 62 is adapted to the external thread 61. By screwing the second interface end 2, the internal thread 62 is connected to the external thread 61, thereby realizing the preliminary connection between the first interface end 1 and the second interface end 2.

[0067] The reinforcement assembly is used to reinforce the connection between the lining hose and the embedded ring cavity 5 in the second interface end 2. The reinforcement assembly includes a top notch 63, a right-angle sealing long cavity 64, a wedge head driving piston 65, and an elastic wedge head driven piston 66:

[0068] The top notch 63 is opened on the first interface end 1. It should be noted that by opening the top notch 63, the outer diameter of the right end of the first interface end 1 is smaller than the inner diameter of the left end of the second interface end 2, thereby avoiding affecting the connection between the internal thread 62 and the external thread 61.

[0069] A right-angle sealing long cavity 64 is opened in the first interface end 1 through the top notch 63. The number of right-angle sealing long cavities 64 is four or eight, which are evenly distributed circumferentially to ensure that the outer wall of the embedded ring cavity 5 can be evenly and continuously pressured during the process of spiral pushing the second interface end 2.

[0070] The wedge driving piston 65 is movably mounted in one end of the right-angle sealing long cavity 64, and the outer end of the wedge driving piston 65 slides against the inner wall of the second interface end 2, and the elastic wedge driven piston 66 is movably mounted in the other end of the right-angle sealing long cavity 64, and the elastic wedge driven piston 66 is movably mounted against the outer wall of the embedded ring cavity 5. It should be noted that the right-angle sealing long cavity 64 is filled with hydraulic oil. In the initial state, the elastic wedge driven piston 66 maintains a trend toward the right-angle sealing long cavity 64. When pressure is applied to the elastic wedge driven piston 66 by the wedge driving piston 65, the elastic wedge driven piston 66 extending into the second interface end 2 is used to apply pressure to the outer wall of the embedded ring cavity 5, so that the opening part of the embedded ring cavity 5 is tightly fitted to the inner wall of the second interface end 2, thereby enhancing the stability of the lining hose in the second interface end 2.

[0071] The first flange 3 and the second flange 4 are butt-jointed and assembled to form a welding point for welding the first interface end 1 and the second interface end 2. The double heat dissipation portion 7 dissipates heat twice to the first interface end 1 and the second interface end 2 through the welding point. Figure 7 -Attached Figure 17 The dual heat dissipation part 7 includes a left docking tooling, a right docking tooling, and a heat drive cooling tooling. It is worth noting that by arranging the concentric left docking tooling and the right docking tooling, the first interface end 1 and the second interface end 2 are docked, thereby forming a welding point between the two, and a cooling structure is arranged around the welding point to provide heat dissipation protection for the lining hose, thereby reducing the impact of high temperature generated by the welding operation on the lining hose:

[0072] Please refer to the instruction manual for details Figure 5 -Attached Figure 8 The left docking tool is provided on the first flange 3, and the left docking tool includes a first ring 31, a docking ring cavity 32, a clearance ring groove 33, a limiting outer groove 34, and an inlet and outlet through hole 35:

[0073] The first circular ring 31 is integrally connected to the first flange 3 , and the two form an annular plate with a thickness of 10 cm.

[0074] The docking ring cavity 32 is opened on the right side of the first circular ring 31, and the docking ring cavity 32 is used to fit the second interface end 2. The end of the second interface end 2 that is fitted on the first interface end 1 extends into the docking ring cavity 32, so that double connection is achieved between the first interface end 1 and the second interface end 2.

[0075] The clearance ring groove 33 is provided at the left side of the first circular ring 31, and six welding slots 36 are provided in the first circular ring 31 to connect the docking ring cavity 32 and the clearance ring groove 33. It should be noted that by providing the clearance ring groove 33 with a diameter greater than the docking ring cavity 32 at the left side of the first circular ring 31 away from the docking ring cavity 32, welding can be achieved at the clearance ring groove 33. By providing six welding slots 36 equidistantly distributed circumferentially, the alloy electrode can be intermittently heated, and arc starting and breaking can be performed periodically at length intervals, thereby forming a series of discontinuous weld spots or weld segments between the first interface end 1, the alloy electrode and the second interface end 2, and having the following performance characteristics:

[0076] First, by periodically interrupting the arc, the heat input per unit time is reduced, which helps to control the size of the heat-affected zone of the welding point and avoid the performance degradation of the welding point due to overheating;

[0077] Secondly, since the welding process is not continuously heated, the weldment has more time to cool and shrink during the welding process, thereby reducing the stress generated during the welding process and effectively reducing the risk of welding deformation and cracking;

[0078] Finally, intermittent welding can increase the welding speed while ensuring the welding quality, because there is no need to weld the entire weld continuously, and a certain length of weld can be completed in a shorter time.

[0079] The limiting outer groove 34 is provided in the docking ring cavity 32, and the docking ring cavity 32 is connected to the welding long hole 36. The limiting outer groove 34 is used to set the alloy welding rod in the first ring 31. The inlet and outlet through-holes 35 are provided in the yielding ring groove 33, and the inlet and outlet through-holes 35 are connected to the limiting outer groove 34. It should be noted that the inlet and outlet through-holes 35 are located between two of the welding long holes 36. The alloy welding rod is pulled along the limiting outer groove 34 through the inlet and outlet through-holes 35 to the position shown in the appendix of the specification. Figure 17 The shape is such that the second interface end 2 can easily enter the docking ring cavity 32.

[0080] The right docking tool is set on the second flange 4 and the second interface end 2. The right docking tool includes a second ring 41, a receiving ring groove 42, and a limiting inner groove 43:

[0081] The second ring 41 is integrally connected to the second flange 4 , and the two form an annular plate with a thickness of 10 cm.

[0082] The accommodating ring groove 42 is opened at the left side of the second circular ring 41. It should be noted that by opening the accommodating ring groove 42, a gap position is created between the first flange 3 and the second flange 4, which can provide an installation and operation position for the automatic heat dissipation group 73, and can also increase the airflow suction and exhaust effect between the first flange 3 and the second flange 4 to ensure ventilation.

[0083] The limiting inner groove 43 is provided on the second interface end 2, and the limiting inner groove 43 is used to set the alloy welding rod on the second interface end 2. The second interface end 2 extends to one end inside the docking ring cavity 32 so that the limiting inner groove 43 and the limiting outer groove 34 correspond concentrically, so that the alloy welding rod corresponding to the limiting inner groove 43 and the limiting outer groove 34 connects the first flange 3 and the second interface end 2.

[0084] The heat drive cooling tooling is arranged between the left docking tooling and the right docking tooling. There are four groups of heat drive cooling tooling, which are equidistantly distributed circumferentially between the first flange 3 and the second flange 4. One end of the heat drive cooling tooling contacts the welding point through the first flange 3.

[0085] The heat drive cooling tooling includes a water pipe group 71, a water storage chamber 72, and an automatic heat dissipation group 73:

[0086] The water pipe group 71 is opened in the second interface end 2, and the water pipe group 71 consists of an equidistant pipe 711 and a moment expansion pipe 712. A water inlet connected to the equidistant pipe 711 is provided in the second interface end 2, and the water storage chamber 72 is connected to the moment expansion pipe 712 and is opened in the second ring 41, and a water outlet connected to the water storage chamber 72 is provided in the second ring 41. Low-temperature water or coolant is input into the second interface end 2 and the second flange 4 through the water pipe group 71 to cool the lining hose sleeved in the second interface end 2, thereby reducing the high heat effect of the welding point on the lining hose. For details, please refer to the attached manual. Figure 2 , Attachment Figure 4 , Attachment Figure 9 With attached Figure 12 The equidistant tube 711, the expansion tube 712 and the water storage cavity 72 are used to form a water cooling pipeline covering the lining hose and the embedded annular cavity 5 to cool the lining hose and ensure that the second flange 4 is in a low temperature zone relative to the first flange 3.

[0087] There are four automatic heat dissipation groups 73, which are equidistantly distributed between the first ring 31 and the second ring 41 in the circumferential direction. It is worth noting that the heat dissipation efficiency or effect can be adjusted by increasing or decreasing the number of automatic heat dissipation groups 73. The automatic heat dissipation group 73 includes a first mounting hole 731, a second mounting hole 732, a first metal strip 733, a second metal strip 734, a first assembly 735, a second assembly 736, and a heat dissipation device 737:

[0088] The first mounting hole 731 is opened in the first flange 3, and the second mounting hole 732 is opened in the second flange 4. The number of the first mounting hole 731 and the second mounting hole 732 is set according to the automatic heat dissipation group 73 and corresponds one to one, so that the automatic heat dissipation group 73 is equidistantly set between the first flange 3 and the second flange 4.

[0089] The first metal strip 733 is an Ω-shaped structure with an opening facing downward, and the second metal strip 734 is an Ω-shaped structure with an opening facing upward. It should be noted that a closed circuit is formed by assembling the first metal strip 733 and the second metal strip 734, and the first metal strip 733 and the second metal strip 734 are made of metal conductors of different materials to ensure the generation and stability of the electric field.

[0090] The first assembly 735 is used to securely fit the left ends of the first and second metal strips 733 and 734, where they collide with each other. The first assembly 735 is inserted into the first mounting hole 731 to secure the left ends of the first and second metal strips 733 and 734. The second assembly 736 is used to fit the right ends of the first and second metal strips 733 and 734, where they collide with each other. The second assembly 736 is inserted into the second mounting hole 732 to secure the right ends of the first and second metal strips 733 and 734. It should be noted that the first assembly 735 is located in the first flange 3, closer to the welding point, and therefore in a high-temperature region. The second assembly 736 is located in the second flange 4, farther from the welding point, and, with the water pipe assembly 71 providing water cooling, is therefore in a low-temperature region.

[0091] The heat exhauster 737 is fixedly mounted on the second metal strip 734 and includes a hollow arc plate 7371, a heat exhaust arc hole 7372, a long meandering tube 7373, a circulation pump 7374 and an aluminum foil heat conducting member 7375:

[0092] It should be noted that by setting the first metal strip 733 and the second metal strip 734 to form a closed circuit between the first flange 3 and the second flange 4, and setting the temperature conditions at both ends of the two, the Seebeck effect is formed. The main reason is that the carriers at the hot end diffuse to the cold end, and space charges are formed at both ends of the closed circuit, with negative charges at the hot end and positive charges at the cold end. At the same time, an electric field appears inside, thereby driving the heat exhaust machine 737 to operate.

[0093] The hollow arc plate 7371 is made of insulating material, and the inner and outer end surfaces are arc structures, so that a heat exhaust arc hole 7372 can be opened on the outer wall of the hollow arc plate 7371. The circular long tube 7373 is fixedly mounted in the hollow arc plate 7371. The low-temperature coolant in the circular long tube 7373 is used to allow the hollow arc plate 7371 to perform a cold compress treatment on the second interface end 2. The circulating pump 7374 is electrically connected to the second metal strip 734. Under the action of electric drive, the circulating pump 7374 is operated, so that the coolant can flow in a direction in the circular long tube 7373 to perform hot and cold alternation.

[0094] It should be noted that the inner end of the circular long tube 7373 located on the inner side of the hollow arc plate 7371 is in contact with the second interface end 2, so that the coolant in this part is heated, and the circulating pump 7374 is used to pump the high-temperature coolant in this part to the outer end of the circular long tube 7373 located on the outer side of the hollow arc plate 7371, and the aluminum foil heat conductor 7375 is connected to the fin extending to the outside of the hollow arc plate 7371 through the heat exhaust arc hole 7372. The aluminum foil heat conductor 7375 is in contact with the outer end of the circular long tube 7373, which helps to conduct heat quickly, and then dissipate heat quickly through the fins to cool the coolant located at the outer end of the circular long tube 7373, thereby reusing the coolant.

[0095] The long meandering tube 7373 is provided with an open end extending to the outside of the hollow arc plate 7371 to facilitate the replenishment of coolant.

[0096] The left section outer tube is connected to the end of the first interface end 1 away from the second interface end 2, the right section outer tube to be repaired is connected to the end of the second interface end 2 away from the first interface end 1, and the lining hose passes through the right section outer tube to be repaired and extends into the second interface end 2.

[0097] The welding points are set by the left butt joint tooling and the right butt joint tooling to use the alloy welding rods installed in the first flange 3 and on the second interface end 2. It should be noted that the specific material of the alloy welding rods is determined according to the materials of the first interface end 1, the second interface end 2, the first flange 3 and the second flange 4 to ensure the welding effect.

[0098] The second interface end 2, away from the end of the right section outer pipe to be repaired, extends into the first flange 3 through the left docking tool and the right docking tool.

[0099] The alloy welding rod is sleeved on one end of the second interface end 2 located inside the first flange 3 .

[0100] It should be noted that the automatic heat dissipation group 73 is connected to the first flange 3 and the second flange 4 using a detachable structure so as to be selectively used according to actual effects.

[0101] It should be noted that the specific model and specifications of the circulating pump 7374 need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated.

[0102] The present invention can be explained through the following operation mode:

[0103] An alloy welding rod is provided through the inlet and outlet through-hole 35 and extends into the butt-jointed ring cavity 32 , and is bent along the limiting outer groove 34 through the butt-jointed ring cavity 32 ;

[0104] Horizontally corresponding to the first interface end 1 and the second interface end 2, the second interface end 2 is screwed onto the first interface end 1, and the internal thread 62 is connected with the external thread 61 until the second interface end 2 extends into the docking ring cavity 32. At this time, the limiting inner groove 43 is concentrically corresponding to the limiting outer groove 34;

[0105] During the spiral movement, the second interface end 2 applies pressure to the wedge driving piston 65, causing the elastic wedge driven piston 66 to extend outward from the right-angle sealing long cavity 64 until it tightly contacts the outer wall of the embedded ring cavity 5, thereby compacting and limiting the lining hose sleeved in the embedded ring cavity 5.

[0106] Tighten the alloy welding rod through the inlet and outlet through-hole 35 so that the alloy welding rod is sleeved on the second interface end 2;

[0107] A first metal strip 733 and a second metal strip 734 are mounted through the first mounting hole 731 and the second mounting hole 732. A first mounting member 735 is fixedly mounted on the left ends of the first metal strip 733 and the second metal strip 734 through the first mounting hole 731. A second mounting member 736 is fixedly mounted on the right ends of the first metal strip 733 and the second metal strip 734 through the second mounting hole 732.

[0108] The water inlet and outlet are connected, allowing the coolant flowing through the water pipe assembly 71 and the water storage chamber 72 to cool the lining hose located in the second interface end 2. Simultaneously, the second assembly 736 keeps the right ends of the first metal strip 733 and the second metal strip 734 at a low temperature. Intermittent spot welding is performed on the alloy welding rod through the equidistantly distributed welding holes 36, so that the first interface end 1 and the second interface end 2 are welded together by the alloy welding rod. Simultaneously, the first flange 3 conducts high-temperature heat to the first assembly 735, forming a current loop between the first metal strip 733 and the second metal strip 734.

[0109] The current drives the circulation pump 7374 to operate, driving the coolant in the circular long tube 7373 to alternate, so that the low-temperature coolant located at the inner end of the circular long tube 7373 provides cooling to the second interface end 2 with the built-in water pipe group 71.

[0110] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high temperature protection welding joint for flexible lined trenchless pipe repair, comprising a first interface end (1) and a second interface end (2), wherein the first interface end (1) is used for fixedly connecting a left section outer pipe, and the second interface end (2) is used for fixedly connecting a right section outer pipe to be repaired, and the second interface end (2) is provided with a lining hose sleeved in the right section outer pipe to be repaired, characterized in that: Also includes: A first flange (3), the first flange (3) being fixedly sleeved on the first interface end (1); A second flange (4), the second flange (4) being fixedly sleeved on the second interface end (2); An embedded annular cavity (5), the embedded annular cavity (5) is opened in the second interface end (2), and the embedded annular cavity (5) is used to embed the lining hose through one end of the right section outer pipe to be repaired; A locking portion (6), the locking portion (6) being used to threadably connect the first interface end (1) and the second interface end (2), and the locking portion (6) is embedded in the annular cavity (5) to reinforce one end of the lining hose located inside the second interface end (2); A double heat dissipation portion (7), wherein the first flange (3) and the second flange (4) are butt-jointed and assembled to form a welding point for welding the first interface end (1) and the second interface end (2), and the double heat dissipation portion (7) dissipates heat twice for the first interface end (1) and the second interface end (2) through the welding point; The dual heat dissipation portion (7) includes: A left docking tool, the left docking tool being arranged on the first flange (3), and the left docking tool comprising a first circular ring (31); a right docking tool, the right docking tool being arranged on the second flange (4) and the second interface end (2), and comprising a second circular ring (41); A heat drive cooling tooling is provided between the left docking tooling and the right docking tooling. The heat drive cooling tooling includes an automatic heat dissipation group (73). There are four automatic heat dissipation groups (73). The automatic heat dissipation groups (73) are equidistantly distributed between the first circular ring (31) and the second circular ring (41) in the circumferential direction. The automatic heat dissipation group (73) includes a first mounting hole (731), a second mounting hole (732), a first metal strip (733), a second metal strip (734), a first set of components (735), a second set of components (736), and a heat exhauster (737). The first mounting hole position (731) is provided in the first flange (3), and the second mounting hole position (732) is provided in the second flange (4). The number of the first mounting hole position (731) and the second mounting hole position (732) is set according to the automatic heat dissipation group (73) and corresponds one to one, so that the automatic heat dissipation group (73) is equidistantly provided between the first flange (3) and the second flange (4). The first metal strip (733) is an Ω-shaped structure with an opening facing downward, and the second metal strip (734) is an Ω-shaped structure with an opening facing upward. A closed circuit is formed by assembling the first metal strip (733) and the second metal strip (734), and the first metal strip (733) and the second metal strip (734) are made of metal conductors of different materials. The first assembly (735) is used to fix the left end portion of the first metal strip (733) and the second metal strip (734) that are in conflict with each other, and the first assembly (735) fixes the left end portion of the first metal strip (733) and the second metal strip (734) by being embedded in the first installation hole (731). The second assembly (736) is used to fix the right end portion of the first metal strip (733) and the second metal strip (734) that are in conflict with each other, and the second assembly (736) fixes the right end portion of the first metal strip (733) and the second metal strip (734) by being embedded in the second installation hole (732). The heat exhauster (737) is fixedly mounted on the second metal strip (734).

2. A high temperature protection welding joint for flexible lined trenchless pipeline repair according to claim 1, characterized in that: The left section outer tube is connected to the end of the first interface end (1) away from the second interface end (2), the right section outer tube to be repaired is connected to the end of the second interface end (2) away from the first interface end (1), and the lining hose passes through the right section outer tube to be repaired and extends into the second interface end (2).

3. A high temperature protection welding joint for flexible lined trenchless pipeline repair according to claim 2, characterized in that: The embedded annular cavity (5) is a funnel-shaped structure opened in one end of the second interface end (2) facing the first interface end (1), and the embedded annular cavity (5) is wider on the left and narrower on the right.

4. A high temperature protection welded joint for flexible lined trenchless pipeline repair according to claim 3, characterized in that: The locking portion (6) comprises: A threaded connection assembly, the threaded connection assembly being used for preliminarily assembling the first interface end (1) and the second interface end (2); A reinforcement assembly is provided, wherein the reinforcement assembly is used to reinforce the connection between the lining hose and the embedded annular cavity (5) in the second interface end (2).

5. A high temperature protection welding joint for flexible lined trenchless pipeline repair according to claim 4, characterized in that: The welding points are provided with alloy welding rods sleeved inside the first flange (3) and on the second interface end (2) through the left butt joint tooling and the right butt joint tooling.

6. A high temperature protection welded joint for flexible lined trenchless pipeline repair according to claim 5, characterized in that: The second interface end (2) is extended to the first flange (3) via a left butt joint tool and a right butt joint tool away from the end of the right outer pipe to be repaired.

7. A high temperature protection welded joint for flexible lined trenchless pipeline repair according to claim 6, characterized in that: The alloy welding rod is sleeved on one end of the second interface end (2) located inside the first flange (3).

8. A high temperature protection welded joint for flexible lined trenchless pipeline repair according to claim 7, characterized in that: The number of the heat drive cooling tooling is four groups, and the four groups of the heat drive cooling tooling are equidistantly distributed between the first flange (3) and the second flange (4) in the circumferential direction.

9. A high temperature protection weld joint for flexible lined trenchless pipeline repair according to claim 8, characterized in that: One end of the heat drive cooling tooling contacts the welding point through the first flange (3).

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