Integrated prefabricated thermal insulation pipe

Abstract

The invention relates to the technical field of heat preservation pipes, in particular to an integrated prefabricated heat preservation pipe which comprises a conveying pipe, a heat preservation layer and an outer pipe, a first center disc and a second center disc are fixed to the two ends of the outer pipe correspondingly, a sliding pipe is arranged between the outer pipe and the heat preservation layer, and the inner wall of the sliding pipe is tightly attached to the conveying pipe and slidably sleeves the conveying pipe; the heat preservation layer is fixedly installed on the outer wall of the sliding pipe, and the first center disc and the second center disc are both fixedly connected to the outer wall of the sliding pipe. A threaded connecting part is arranged on the outer wall of one end of the outer pipe, a connecting ring is fixedly installed at the other end of the outer pipe, and threads matched with the threaded connecting part are arranged at the inner ring position of the connecting ring. The sliding pipe, the outer pipe and the heat preservation layer are designed into a whole, the sliding pipe is installed on the conveying pipes in a sliding mode, the heat preservation layer of one heat preservation pipe and the outer pipe can slide to cover a gap reserved in the welding position after the two conveying pipes are welded, and the convenience of connecting and installing the heat preservation pipes is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation pipes, in particular to an integrated prefabricated thermal insulation pipe. Background Art

[0002] Insulated pipe is the abbreviation of insulated pipe. Insulated pipe is often used for the thermal insulation transportation of liquids, gases and other media. It is widely used in petroleum, chemical industry, hot springs, central heating and other fields.

[0003] The insulation pipe is usually composed of a delivery pipe for conveying the medium, an insulation layer, and an outer pipe for protecting the delivery pipe and the insulation layer. The insulation layer is fixedly wrapped on the delivery pipe, and the outer pipe is wrapped outside the delivery pipe and is arranged concentrically with the delivery pipe. The outer pipe and the delivery pipe are usually fixedly connected together. When connecting multiple insulation pipes, since the delivery pipes of two insulation pipes need to be welded, in order to leave space for the welding operation, the delivery pipe of the insulation pipe is usually longer than the outer pipe.

[0004] In the prior art, after the conveying pipe is welded, since the outer tube of each insulation pipe is shorter than the conveying pipe, there will be a gap between the outer tubes of the two insulation pipes. In order to ensure the insulation effect of the welding point, it is necessary to manually wrap the empty conveying pipe at the welding point with an insulation layer between the two outer tubes, and then add a section of outer tube to wrap the insulation layer at the welding point. Finally, the added outer tube is welded to the outer tubes of the two insulation pipes respectively to ensure that rainwater does not enter the inner part of the outer tube and to ensure the dryness of the insulation layer.

[0005] Although there are improvements to the insulation pipe structure in the prior art, such as the Chinese invention patent with application number CN202310846292.X and titled "Anti-corrosion Insulation Pipeline", the above installation method is also basically adopted. When the existing insulation pipe adopts the above installation method to connect multiple insulation pipes, the above operation needs to be repeated once for each connection between two insulation pipes. The operation is complicated, many welding positions are required, and it takes a long time, which is not conducive to the rapid installation of the insulation pipe.

[0006] To this end, an integrated prefabricated insulation pipe is proposed to improve the installation convenience between insulation pipes. Summary of the invention

[0007] The object of the present invention is to provide an integrated prefabricated thermal insulation pipe, so as to improve the convenience of installation between thermal insulation pipes and facilitate the rapid installation of thermal insulation pipes.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] An integrated prefabricated thermal insulation pipe comprises a conveying pipe, an insulation layer and an outer pipe, wherein the outer pipe is coaxially arranged outside the conveying pipe, the length of the outer pipe is shorter than that of the conveying pipe, the insulation layer is wrapped around the outside of the conveying pipe and the insulation layer is located inside the outer pipe, a first center disk and a second center disk are respectively arranged at two ends of the outer pipe, the first center disk and the second center disk are both concentrically fixedly connected to the end surface of the outer pipe, the first center disk and the second center disk are both used to keep the conveying pipe and the outer pipe concentric, a sliding pipe is arranged between the outer pipe and the insulation layer, the length of the sliding pipe is the same as that of the outer pipe, the inner wall of the sliding pipe is tightly attached to the conveying pipe and the sliding pipe is slidably sleeved on the conveying pipe, the insulation layer is fixedly installed on the outer wall of the sliding pipe, the first center disk and the second center disk are both fixedly connected to the outer wall of the sliding pipe; a threaded connection portion is arranged on the outer wall of one end of the outer pipe, a connecting ring is fixedly installed on the other end of the outer pipe, and a thread matching the threaded connection portion is arranged at the inner ring of the connecting ring; a sealing assembly is also arranged on the center disk.

[0010] The outer tube is fixedly connected to the sliding tube through the first center disk and the second center disk, and the sliding tube is slidably installed on the outer wall of the conveying tube, and the insulation layer insulates the sliding tube. After being arranged in this way, the outer tube can slide on the conveying tube following the sliding tube. When connecting multiple insulation tubes, after the conveying tubes of two insulation tubes are connected by welding, the outer tube of one insulation tube can be pushed toward the outer tube of another insulation tube, and the connecting ring of one outer tube is connected to the threaded connection part of the other outer tube by a thread. In this way, the outer tubes of the two insulation tubes are connected, and one of the outer tubes wraps the welding part of the two conveying tubes, and the gap between the two outer tubes vacated by the conveying tube welding is filled, and there is no need to wrap the insulation layer in the gap and fill the outer tube in the gap, which improves the convenience of the insulation tube installation and greatly saves the time of connecting the insulation tubes. Connecting the outer tubes of the two insulation tubes in the form of threads is convenient for the connection between the outer tubes of the insulation tubes and helps prevent moisture from entering the inner part of the outer tubes.

[0011] During the insulation pipe connection process, after the outer tube of one insulation pipe fills the welded part of the delivery pipe, the vacant part will be transferred to the end of one insulation pipe. In this way, when connecting multiple insulation pipes, the part reserved for the delivery pipe welding between the insulation pipes can be continuously transferred to the delivery pipe at the rear. After connecting multiple insulation pipes, you only need to fill the last vacant part. Compared with the need to add a section of insulation layer and a section of outer tube between every two insulation pipes, it greatly saves the time required to connect multiple insulation pipes.

[0012] In addition, the first center disk and the second center disk cooperate with the sliding tube to wrap the insulation layer between the sliding tube and the outer tube, which also helps to prevent the insulation layer from getting damp and affecting the insulation effect of the insulation tube.

[0013] Preferably, the sealing assembly includes a receiving groove opened on the end surface of the first center disk, the receiving groove is an annular groove, the receiving groove is concentrically arranged with the sliding tube, a sealing ring is arranged inside the receiving groove, and the sealing ring is made of rubber material. The sealing assembly also includes an extrusion ring arranged on the second center disk, the extrusion ring is an annular protrusion, the extrusion ring is the same size as the receiving groove, and the extrusion ring is concentrically arranged with the receiving groove, and the receiving groove and the extrusion ring are respectively located on a side of the first center disk and the second center disk that are away from each other.

[0014] In the process of connecting the two outer tubes through threads, as the two outer tubes are continuously pulled closer through the threaded engagement, the second center disk on one of the outer tubes and the first center disk on the other outer tube will continue to approach each other, and finally the extrusion ring on one of the outer tubes will squeeze the sealing ring on the other outer tube. The sealing ring is deformed under the extrusion of the extrusion ring and tightly contacts the disk surfaces of the first center disk and the second center disk that tighten it. The sealing ring finally isolates the delivery pipe from the connecting ring, preventing moisture from penetrating from the threaded connection and adhering to the delivery pipe, affecting the thermal insulation effect of the delivery pipe.

[0015] Preferably, the sealing ring has a circular cross-section, and an annular hollow cavity is provided inside the sealing ring, and the hollow cavity is filled with a sealant. As the sealing ring is continuously squeezed by the extrusion ring, the sealant inside the sealing ring will break the sealing ring under the action of pressure, and eventually the sealant inside the sealing ring will leak out, and after the sealant leaks out, it will fill the gap between the first center disk and the second center disk. The sealing ring continues to be squeezed by the first center disk and the second center disk, and the sealing ring fills the gap between the first center disk and the second center disk by deformation, and since the sealant is a fluid, it can fill the gap that the sealing ring cannot fill, further improving the waterproof effect of the insulation pipe and preventing moisture from contacting the insulation pipe from the gap between the first center disk and the second center disk.

[0016] It is worth mentioning that when the sealing ring is squeezed and damaged to release the sealant, the connecting ring has been engaged with the threaded connection part, that is, the connecting ring cooperates with the first center disk, the second center disk and the delivery pipe to surround the sealing ring inside the closed space, ensuring that the sealant will not be wasted due to leakage and cannot be completely filled in the gap. In addition, it can also prevent dust and debris from falling and affecting the sealing effect of the sealant.

[0017] Preferably, an annular guide ring is provided on the inner ring and the outer ring of the sealing ring, the guide ring is concentric with the sealing ring, the guide groove is provided on the guide ring, the two guide grooves are located in the same plane, and the plane where the guide groove is located passes through the center of the sealing ring, and an annular V-shaped groove is provided on the inner ring and the outer ring of the sealing ring, the V-shaped groove is concentric with the sealing ring, and the two V-shaped grooves are respectively located in the two guide grooves. The setting of the V-shaped groove makes the sealing ring at the V-shaped groove weaker, which helps to make the sealing ring break at the V-shaped groove. After the sealing ring breaks, the sealant will be sprayed in the direction of the connecting ring and the conveying pipe under the action of the guide groove. After the sealant is sprayed onto the surface of the conveying pipe, it can enter the gap between the conveying pipe and the sliding pipe, further fill and seal the gap between the conveying pipe and the sliding pipe, prevent water vapor from entering the gap between the conveying pipe and the sliding pipe, and further improve the insulation effect of the insulation pipe.

[0018] In addition, since the sealing ring is provided with a weak point, the time when the sealing ring ruptures under extrusion will be advanced. Under the action of the guide groove, the sealant is sprayed out and guided to the thread of the connecting ring. As the thread on the connecting ring continues to engage with the threaded connection part, the sealant will be continuously brought into the gap of the thread engagement, further preventing external water vapor from entering the inner part of the outer pipe from the thread, further improving the sealing effect between the threaded connection part and the connecting ring, and ensuring the thermal insulation effect of the insulation pipe.

[0019] Preferably, a cleaning ring is provided on one side of the first center disk with the accommodating groove, the cleaning ring is arranged concentrically with the conveying pipe, bristles are evenly distributed on the circumference of the inner ring of the cleaning ring, and an avoidance groove for accommodating the cleaning ring is provided on one side of the second center disk where the extrusion ring is located.

[0020] The bristles are wrapped around the outside of the delivery pipe and in contact with the delivery pipe. After the two delivery pipes are welded, when the worker pushes the outer pipe of one delivery pipe toward the outer pipe of the other delivery pipe, the bristles move with the outer pipe, and because the bristles slide close to the outer wall of the delivery pipe, the bristles can clean the outer wall of the delivery pipe that the sliding pipe passes through in advance, preventing the sliding pipe from being blocked by welding slag adhered to the outer wall of the delivery pipe when passing through the welding part of the delivery pipe. There is no need to manually clean the welding slag, which ensures the smoothness of the outer pipe moving through the welding part and improves the convenience of installing the insulation pipe.

[0021] Preferably, a plurality of connecting rods are fixedly mounted on one surface of the cleaning ring, and the connecting rods are evenly distributed on the circumference of the cleaning ring. A plurality of slots matching the plurality of connecting rods are opened on the first center disk, and the cleaning ring is inserted into the slots through the connecting rods. A pressing portion is provided on the side of the cleaning ring facing the first center disk, and the pressing portion is tightly attached to the guide ring of the inner ring of the sealing ring, and a passing gap is formed between the cleaning ring and the first center disk.

[0022] The cleaning ring is connected to the first center disk by plugging, which makes it easy to install and remove the cleaning ring. Since it is a prefabricated insulation pipe, the insulation pipe may need to be stored for a period of time after manufacturing, and the bristles are easily contaminated or damaged by aging if exposed to the air environment for a long time. The cleaning ring is detachable, which helps to store the cleaning ring separately, and the cleaning ring can be quickly installed on the first center disk when the insulation pipe needs to be used.

[0023] In addition, a pressing part is provided on the cleaning ring, and the pressing part can press the guide ring. Originally, the sealing ring was directly inserted into the receiving groove. Since there was no structure to limit the sealing ring, the sealing ring was easy to fall off from the receiving groove during the sliding of the sliding tube. With the cooperation of the pressing part and the first center disk, the end face of the pressing part and the first center disk will limit the guide ring fixed on the inner ring of the sealing ring, preventing the sealing ring from falling off from the receiving groove, ensuring that the extrusion ring can align with the sealing ring and squeeze the sealing ring during the movement of the outer tube, further ensuring the stability of the insulation tube during installation.

[0024] The sealant can be further guided through the gap to flow toward the delivery pipe, and the sealant will adhere to the bristles after passing through the gap. After the sealant adheres to the bristles, it fills the gaps between the bristles to avoid the formation of space that is easy to store water vapor at the bristles, thereby ensuring the insulation effect of the insulation pipe.

[0025] Preferably, a plurality of lubricating rings for containing grease are provided on the inner wall of the sliding tube. The lubricating ring is filled with grease, which helps to sleeve the sliding tube on the conveying tube along the outer wall of the conveying tube when producing the insulation tube, thereby improving the convenience of producing the insulation tube. In addition, when installing multiple insulation tubes, the outer tubes of the multiple insulation tubes need to slide on the conveying tube, and the grease inside the lubricating ring helps to reduce the friction between the sliding tube and the conveying tube, further improving the convenience of installing the insulation tube. After the grease is filled in the lubricating ring, the lubricating ring is sealed by the outer wall of the conveying tube, which helps to prevent the grease inside the lubricating ring from being contaminated by dust, and the grease is not easy to melt and lose at high temperature, thereby ensuring the effectiveness of the grease after the prefabricated insulation tube is stored for a long time, thereby improving the timeliness of the use of the prefabricated insulation tube, and facilitating the storage of the prefabricated insulation tube.

[0026] Preferably, a plurality of handles are fixedly mounted on the outer wall of the connecting ring, and the plurality of handles are evenly distributed on the connecting ring. The handles facilitate the workers to grasp and enable the workers to better rotate the outer tube, so as to connect the outer tubes of two insulating tubes when installing multiple insulating tubes, further improving the convenience of connecting and installing the insulating tubes.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The integrated prefabricated insulation pipe designed by the present invention designs the sliding pipe, the outer pipe and the insulation layer as a whole, and slides the sliding pipe on the conveying pipe, so that the insulation layer and the outer pipe of one of the insulation pipes can slide to cover the gap left at the welding point after the two conveying pipes are welded. There is no need to manually re-wrap the insulation layer at the welding point, and there is no need to add the outer pipe at the welding point, which improves the convenience of connecting and installing the insulation pipe and saves the time required for connecting the insulation pipe.

[0029] 2. The integrated prefabricated insulation pipe designed by the present invention is also provided with a sealing assembly. The extrusion ring and the sealing ring can seal the connection of the insulation pipe to prevent water vapor from contacting the delivery pipe. In addition, the sealing ring of the sealing assembly is filled with a sealant. When the extrusion ring squeezes the sealing ring, the sealant will be squeezed out of the sealing ring. The sealant cooperates with the sealing ring to further seal the gap at the connection of the two insulation pipes, further ensuring the insulation performance of the insulation pipe.

[0030] 3. The integrated prefabricated insulation pipe designed by the present invention is also provided with a cleaning ring. The cleaning ring automatically cleans the conveying pipe on the sliding pipe path as it follows the movement of the outer pipe, thereby preventing dust and welding slag from affecting the movement of the sliding pipe, ensuring the smoothness of the sliding pipe movement, and ensuring the stability of the insulation pipe during connection and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is a front view of the present invention;

[0033] Figure 3 For the present invention Figure 2 Sectional view at AA in the middle;

[0034] Figure 4 For the present invention Figure 3 The enlarged view of point B in the middle;

[0035] Figure 5 For the present invention Figure 4 Enlarged view of point C in the middle;

[0036] Figure 6 It is a schematic diagram of the structure when two insulation pipes are connected in the present invention;

[0037] Figure 7 For the present invention Figure 6 The enlarged view of point D in the middle;

[0038] Figure 8 It is a schematic diagram of the three-dimensional structure of the sealing ring in the present invention.

[0039] In the figure: 1. conveying pipe; 2. insulation layer; 3. outer pipe; 4. first center disk; 5. second center disk; 6. sliding pipe; 7. threaded connection part; 8. connecting ring; 9. receiving groove; 10. sealing ring; 11. extrusion ring; 12. hollow cavity; 13. guide ring; 14. guide groove; 15. V-shaped groove; 16. cleaning ring; 17. bristles; 18. avoidance groove; 19. connecting rod; 20. slot; 21. pressing part; 22. through gap; 23. lubrication ring; 24. handle. DETAILED DESCRIPTION

[0040] See also Figures 1 to 8 The present invention provides an integrated prefabricated thermal insulation pipe, and the technical solution is as follows:

[0041] An integrated prefabricated insulation pipe comprises a conveying pipe 1, an insulation layer 2 and an outer pipe 3. The length of the outer pipe 3 is shorter than that of the conveying pipe 1. The outer pipe 3 is coaxially arranged outside the conveying pipe 1. The insulation layer 2 is wrapped around the outside of the conveying pipe 1 and is located inside the outer pipe 3. The first center disk 4 and the second center disk 5 are respectively arranged at both ends of the outer pipe 3. The first center disk 4 and the second center disk 5 are both made of plastic material. The first center disk 4 and the second center disk 5 are both concentrically glued and fixedly connected to the end surface of the outer pipe 3. The first center disk 4 and the second center disk 5 are both used to keep the conveying pipe 1 and the outer pipe 3 concentric. A sliding pipe 6 is arranged between the outer pipe 3 and the insulation layer 2. The length of the sliding pipe 6 is the same as that of the outer pipe 3. Three lubricating rings 23 are arranged on the inner wall of the sliding pipe 6. The lubricating rings 23 are filled with grease. The inner wall of the sliding pipe 6 is close to the conveying pipe 1 and the sliding pipe 6 is slidably sleeved on the conveying pipe 1. The insulation layer 2 is made of insulation cotton, and the insulation layer 2 is fixedly wrapped on the outer wall of the sliding pipe 6. The first center disk 4 and the second center disk 5 are both glued and fixedly connected to the outer wall of the sliding tube 6; a threaded connection portion 7 is provided on the outer wall of one end of the outer tube 3, and a connecting ring 8 is fixedly installed on the other end of the outer tube 3, and a thread matching the threaded connection portion 7 is provided at the inner ring of the connecting ring 8. Four handles 24 are fixedly installed on the outer wall of the connecting ring 8, and the four handles 24 are evenly distributed on the circumference of the connecting ring 8.

[0042] refer to Figure 3 , Figure 4 , Figure 5 and Figure 7, the first center disk 4 and the second center disk 5 are also provided with a sealing assembly. The sealing assembly includes a receiving groove 9 opened on the end surface of the first center disk 4, the receiving groove 9 is an annular groove, the receiving groove 9 is concentrically arranged with the sliding tube 6, a sealing ring 10 is arranged inside the receiving groove 9, the sealing ring 10 is made of rubber material, the cross section of the sealing ring 10 is circular, the sealing ring 10 is provided with an annular hollow cavity 12 inside, the hollow cavity 12 is filled with a sealant, and the sealant is a polyurethane caulking agent. An annular guide ring 13 is arranged on the inner ring and the outer ring of the sealing ring 10, the guide ring 13 is concentric with the sealing ring 10, and a guide groove 14 is opened on the guide ring 13, the two guide grooves 14 are located in the same plane, and the plane where the guide groove 14 is located passes through the center of the circle of the sealing ring 10, and an annular V-shaped groove 15 is opened on the inner ring and the outer ring of the sealing ring 10, and the two V-shaped grooves 15 are respectively located in the two guide grooves 14. The sealing assembly also includes an extrusion ring 11 arranged on the second center disk 5. The extrusion ring 11 is an annular protrusion. The extrusion ring 11 is the same size as the accommodating groove 9, and the extrusion ring 11 and the accommodating groove 9 are concentrically arranged. The accommodating groove 9 and the extrusion ring 11 are respectively located on the side of the first center disk 4 and the second center disk 5 that are away from each other.

[0043] refer to Figure 3 , Figure 4 , Figure 5 as well as Figure 7 A cleaning ring 16 is arranged on one side of the first center disk 4 with the receiving groove 9. The cleaning ring 16 is arranged concentrically with the conveying pipe 1, and bristles 17 are evenly distributed on the inner ring of the cleaning ring 16. Two connecting rods 19 are fixedly installed on one side of the cleaning ring 16. The connecting rods 19 are evenly distributed on the cleaning ring 16. Two card slots 20 matching with the multiple connecting rods 19 are arranged on the first center disk 4. The cleaning ring 16 is inserted into the card slots 20 through the connecting rods 19. A pressing portion 21 is arranged on the side of the cleaning ring 16 facing the first center disk 4. The pressing portion 21 is tightly attached to the guide ring 13 located on the inner ring of the sealing ring 10, and a passing gap 22 is formed between the cleaning ring 16 and the first center disk 4. An avoidance groove 18 for accommodating the cleaning ring 16 is arranged on one side of the second center disk 5 where the extrusion ring 11 is located.

[0044] refer to Figure 6 In the process of connecting and installing multiple pipes of the insulation pipe, the outer pipe 3 and the delivery pipe 1 of one insulation pipe are fixed as the first insulation pipe, and one end of the first center plate 4 of the second insulation pipe is directed toward one end of the second center plate 5 of the fixed insulation pipe, and the delivery pipe 1 of the second insulation pipe is coaxially aligned with the delivery pipe 1 of the fixed insulation pipe. A groove is opened at the welding end of the two delivery pipes 1, and then the grooves of the two delivery pipes 1 are aligned and welded.

[0045] refer to Figure 6After the welding is completed, the staff pulls the handle 24 on the second insulation pipe connecting ring 8 to pull the outer tube 3 of the second insulation pipe toward the outer tube 3 of the first insulation pipe, and the sliding tube 6 of the second insulation pipe slides along the outer wall of the delivery tube 1 of the second insulation pipe, and continues to slide along the outer wall of the delivery tube 1 of the first insulation pipe after passing the welding position. During the movement of the outer tube 3 of the second insulation pipe, the bristles 17 on the cleaning ring 16 of the second insulation pipe will clean the welding slag and dust on the outer wall of the delivery tube 1 in advance on the path of the sliding tube 6 to ensure the smoothness of the sliding tube 6. At the same time, the grease inside the sliding tube 6 of the second insulation pipe will be applied to the path passed, further ensuring the smoothness of the movement of the sliding tube 6 and the outer tube 3.

[0046] refer to Figure 3 , Figure 6 and Figure 7 When the connecting ring 8 on the outer tube 3 of the second insulation tube contacts the threaded connection part 7 on the first outer tube 3, the staff pulls the handle 24 on the second insulation tube to drive the outer tube 3 and the sliding tube 6 to rotate around the axis of the conveying tube 1, so that the connecting ring 8 of the second insulation tube is threadedly engaged with the threaded connection part 7 of the first insulation tube. As the threaded engagement continues, the first center disk 4 of the second insulation tube continuously approaches the second center disk 5 of the first insulation tube. In the process of rotating the outer tube 3, since the grease is applied to lubricate the conveying tube 1 during the sliding process of the sliding tube 6, the resistance during the rotation process can also be reduced.

[0047] refer to Figure 6 and Figure 7 When the sealing ring 10 on the first center disk 4 contacts the extrusion ring 11 on the second center disk 5, as the thread engagement continues, the extrusion ring 11 will continue to squeeze the sealing ring 10, and the sealant inside the sealing ring 10 will begin to squeeze the ring wall of the sealing ring 10 from the inside. Since the position where the V-shaped groove 15 is provided on the sealing ring 10 is relatively weak, the V-shaped groove 15 provided on the outer ring and the inner ring of the sealing ring 10 will eventually be expanded and burst by the sealant under the extrusion of the extrusion ring 11, and the sealant sprayed from the outer ring of the sealing ring 10 is sprayed to the thread of the connecting ring 8 under the guidance of the guide groove 14. As the thread on the connecting ring 8 is continuously engaged with the threaded connection part 7, the sealant will be continuously brought into the gap of the thread engagement, and the sealant will block the gap at the threaded connection, and finally harden to prevent water vapor from entering the inner part of the outer tube 3 from the threaded connection.

[0048] At the same time, reference Figure 7The sealant sprayed from the inner ring of the sealing ring 10 is sprayed toward the conveying pipe 1 under the guidance of the guide groove 14. The sprayed sealant passes through the gap 22 and contacts the surface of the conveying pipe 1. A part of the sealant adheres to the bristles 17 to fill the gap between the bristles 17. As the connecting ring 8 and the threaded connection part 7 are continuously meshed and connected, the extrusion ring 11 is also continuously extruding the sealing ring 10 and continuously squeezing out the sealant inside the sealing ring 10. Finally, after the extrusion ring 11 squeezes all the sealant out of the hollow cavity 12, the extrusion ring 11 begins to squeeze the ring wall of the sealing ring 10. The ring wall of the sealing ring 10 is squeezed and deformed and surrounds the conveying pipe 1 therein to prevent water vapor from contacting the conveying pipe 1. After the sealant is discharged from the hollow cavity 12, it enters the gap between the first center disk 4 and the second center disk 5. A part of the sealant also enters the gap between the conveying pipe 1 and the sliding tube 6. The sealant completely blocks the gap between the first center disk 4 and the second center disk 5. When the threaded connection between the threaded connection part 7 and the connecting ring 8 reaches the limit, the cleaning ring 16 has been inserted into the avoidance groove 18 of the second center disk 5. Then, only need to wait for the sealant to harden and solidify to complete the connection and installation of the first insulation pipe and the second insulation pipe.

[0049] By analogy, when it is necessary to continue to connect the insulation pipe, it is only necessary to add another prefabricated insulation pipe to one end of the second center disk 5 of the second insulation pipe and repeat the above operation.

[0050] Finally, as the outer tube 3 is continuously moved to fill the space between the two insulation tubes for welding, the exposed length of the delivery tube 1 at the last insulation tube, that is, the length not covered by the sliding tube 6, the outer tube 3 and the insulation layer 2, will become longer and longer. Finally, when all the insulation tubes are welded, the prefabricated assembly of the sliding tube 6, the insulation layer 2 and the outer tube 3 is removed from the prefabricated insulation tube, and it is set along the delivery tube 1 to the exposed position to fill the exposed part of the insulation tube.

[0051] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. An integrated prefabricated thermal insulation pipe, comprising a conveying pipe (1), a thermal insulation layer (2) and an outer pipe (3), wherein the length of the outer pipe (3) is shorter than that of the conveying pipe (1), the outer pipe (3) is coaxially arranged outside the conveying pipe (1), the thermal insulation layer (2) is wrapped around the outside of the conveying pipe (1) and the thermal insulation layer (2) is located inside the outer pipe (3), and a first center disk (4) and a second center disk (5) are respectively arranged at both ends of the outer pipe (3), the first center disk (4) and the second center disk (5) are both concentrically fixedly connected to the end surface of the outer pipe (3), and the first center disk (4) and the second center disk (5) are both used to keep the conveying pipe (1) and the outer pipe (3) concentric, characterized in that: A sliding tube (6) is arranged between the outer tube (3) and the thermal insulation layer (2); the length of the sliding tube (6) is the same as that of the outer tube (3); the inner wall of the sliding tube (6) is in close contact with the conveying tube (1) and the sliding tube (6) is slidably sleeved on the conveying tube (1); the thermal insulation layer (2) is fixedly mounted on the outer wall of the sliding tube (6); the first center disk (4) and the second center disk (5) are both fixedly connected to the outer wall of the sliding tube (6); a threaded connection portion (7) is arranged on the outer wall of one end of the outer tube (3); a connecting ring (8) is fixedly mounted on the other end of the outer tube (3); a thread matching the threaded connection portion (7) is arranged on the inner ring of the connecting ring (8); and a sealing assembly is also arranged on the first center disk (4) and the second center disk (5).

2. The integrated prefabricated thermal insulation pipe according to claim 1, characterized in that: The sealing assembly comprises a receiving groove (9) provided on the end surface of the first center disk (4), the receiving groove (9) being an annular groove, the receiving groove (9) being concentrically arranged with the sliding tube (6), a sealing ring (10) being arranged inside the receiving groove (9), the sealing ring (10) being made of a rubber material, the sealing assembly further comprises an extrusion ring (11) arranged on the second center disk (5), the extrusion ring (11) being an annular protrusion, the extrusion ring (11) being the same size as the receiving groove (9), the extrusion ring (11) being concentrically arranged with the receiving groove (9), the receiving groove (9) and the extrusion ring (11) being respectively located on a surface of the first center disk (4) and the second center disk (5) which are away from each other.

3. The integrated prefabricated thermal insulation pipe according to claim 2, characterized in that: The sealing ring (10) has a circular cross section, and an annular hollow cavity (12) is provided inside the sealing ring (10), and the hollow cavity (12) is filled with a sealant.

4. The integrated prefabricated thermal insulation pipe according to claim 3, characterized in that: An annular flow guide ring (13) is provided on both the inner ring and the outer ring in the sealing ring (10); the flow guide ring (13) is concentric with the sealing ring (10); a flow guide groove (14) is provided on the flow guide ring (13); the two flow guide grooves (14) are located in the same plane, and the plane where the flow guide grooves (14) are located passes through the center of the sealing ring (10); an annular V-shaped groove (15) is provided on both the inner ring and the outer ring of the sealing ring (10); the two V-shaped grooves (15) are respectively located in the two flow guide grooves (14).

5. The integrated prefabricated thermal insulation pipe according to claim 4, characterized in that: A cleaning ring (16) is arranged on one side of the first center disk (4) on which the receiving groove (9) is opened. The cleaning ring (16) is arranged concentrically with the conveying pipe (1), and bristles (17) are evenly distributed on the circumference of the inner ring of the cleaning ring (16). An avoidance groove (18) for accommodating the cleaning ring (16) is arranged on one side of the second center disk (5) on which the extrusion ring (11) is located.

6. The integrated prefabricated thermal insulation pipe according to claim 5, characterized in that: A plurality of connecting rods (19) are fixedly mounted on one surface of the cleaning ring (16), and the connecting rods (19) are evenly distributed on the circumference of the cleaning ring (16). A plurality of slots (20) matching the plurality of connecting rods (19) are provided on the first center disk (4), and the cleaning ring (16) is inserted into the slots (20) through the connecting rods (19). A pressing portion (21) is provided on a side of the cleaning ring (16) facing the first center disk (4), and the pressing portion (21) is tightly attached to the guide ring (13) located on the inner ring of the sealing ring (10), and a through gap (22) is formed between the cleaning ring (16) and the first center disk (4).

7. The integrated prefabricated thermal insulation pipe according to claim 1, characterized in that: A plurality of lubrication rings (23) for containing lubrication grease are arranged on the inner wall of the sliding tube (6).

8. The integrated prefabricated thermal insulation pipe according to claim 1, characterized in that: A plurality of handles (24) are fixedly mounted on the outer side wall of the connecting ring (8), and the plurality of handles (24) are evenly distributed around the circumference of the connecting ring (8).

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