Waterproof and dustproof quick plugging device for directly-buried prefabricated thermal insulation pipe port

Abstract

The invention discloses a waterproof and dustproof quick plugging device for a port of a directly-buried prefabricated thermal insulation pipe, and mainly relates to the technical field of construction and maintenance of thermal insulation pipes. Comprising a sealing cover and a center rod, a protruding part making contact with the inner side of a pipe body is arranged in the middle of the sealing cover, a first supporting block is slidably connected to the center rod, the end of the first supporting block makes contact with the protruding part, a transverse plate is arranged at the end of the first supporting block, and a second supporting block is slidably connected to the transverse plate; the first air bag and the second air bag make contact with the sealing cover, the center rod is provided with a first wedge-shaped block which drives the first supporting blocks to slide on the center rod in the radial direction at the same time, the second supporting blocks are provided with fixing rings, and the pull rope sequentially penetrates through the fixing rings and drives the second supporting blocks to slide on the transverse plate. The device has the beneficial effects that the problem that temporary plugging of the end opening of the directly-buried prefabricated thermal insulation pipe is inconvenient is solved, and the plugging effect on the end opening of the directly-buried prefabricated thermal insulation pipe is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation pipe construction and maintenance, in particular to a waterproof and dustproof rapid plugging device for a port of a directly buried prefabricated thermal insulation pipe. Background Art

[0002] At present, most of the thermal pipelines, whether they are large-diameter long-distance thermal pipelines or primary and secondary networks in urban areas, use direct-buried prefabricated insulated pipes. In order to ensure the normal operation of the pipelines during the heating season, all new pipeline construction and technical transformation and maintenance of old pipelines are generally carried out in summer. However, the abundant rainfall in summer has a certain impact on the construction in the direct-buried pipeline trenches. In particular, before the rainfall, the ports of the prefabricated insulated pipes under construction must be waterproofed and sealed to prevent rainwater and mud in the trenches from entering the pipelines and causing pollution, which will cause trouble for the subsequent flushing of the pipelines. However, the sealing of the port of the prefabricated insulated pipe includes not only the working steel pipe, but also the insulation layer and the protective shell. The usual practice is to cover the entire port with a waterproof cloth and then tie it up. This implementation is complicated and cannot ensure the strength and tightness of the port sealing. Once rainwater and sediment enter the pipeline and the insulation layer, the corresponding pipe section must be decontaminated, flushed and dried, and the weld groove at the end of the pipeline must be derusted and repaired, which is time-consuming, laborious and difficult to repair. If the construction period is rushed in a season with frequent rainfall, the port needs to be frequently sealed, opened, re-sealed and reopened, which reduces the efficiency of maintaining the thermal network to a certain extent. Summary of the invention

[0003] The purpose of the present invention is to provide a waterproof and dustproof quick sealing device for the ports of directly buried prefabricated insulated pipes, so as to solve the problem of inconvenience in temporarily sealing the ports of directly buried prefabricated insulated pipes and improve the sealing effect of the ports of directly buried prefabricated insulated pipes.

[0004] In order to achieve the above-mentioned purpose, the invention is implemented through the following technical solutions: A waterproof and dustproof quick plugging device for the port of a directly buried prefabricated insulated pipe comprises a plugging mechanism arranged at both ends of the insulated pipe, the insulated pipe comprises a pipe body, an insulating layer and an outer shell, the plugging mechanism comprises a fixing mechanism and a sealing cover sleeved at both ends of the outer shell, the sealing cover simultaneously wraps the pipe body, the insulating layer and the ends of the outer shell, a raised portion in contact with the inner side of the pipe body is provided in the middle of the sealing cover, the fixing mechanism comprises a center rod, a plurality of first supporting blocks are radially slidably connected to the center rod, the ends of the first supporting blocks are in contact with the raised portions, and the ends of the first supporting blocks are in contact with the raised portions. The part is provided with a transverse plate, on which a second support block is slidably connected, and also includes a first airbag and a second airbag respectively sleeved on the outside of the plurality of first support blocks and the plurality of second support blocks, the first airbag and the second airbag are respectively in contact with the sealing cover, the first airbag and the second airbag are respectively provided with a first inflation hole and a second inflation hole, the center rod is provided with a first wedge block for simultaneously driving the plurality of first support blocks to slide radially on the center rod, the second support block is provided with a fixing ring, and also includes a pull rope which passes through the plurality of fixing rings in sequence and drives the second support block to slide on the transverse plate.

[0005] Furthermore, a first conical surface is provided on one side of the first wedge block, the first wedge block is threadedly connected to the center rod, a second wedge block is provided on one side of the first supporting block, and a second conical surface in contact with the first conical surface is provided on one side of the second wedge block.

[0006] Furthermore, a fixed block is slidably connected to the center rod, a first groove is provided on the center rod, a first protrusion is slidably connected to the first groove is provided on the fixed block, a plurality of second grooves are provided at the end of the first wedge block, and a plurality of second protrusions are provided at the end of the fixed block to be plugged into and cooperate with the second grooves.

[0007] Furthermore, balls are symmetrically arranged on the second protrusion, grooves for plugging and cooperating with the balls are respectively arranged on both sides of the second groove, and a first spring is arranged between the two balls.

[0008] Furthermore, the center rod is radially provided with a plurality of sliding rods slidably connected to the first support block, the first support block and the second support block are respectively provided with a first notch and a second notch in contact with the first airbag and the second airbag, and a second spring is provided between the end of the sliding rod and the first support block.

[0009] Furthermore, one end of the pull rope is fixed on one of the second supporting blocks, one of the second supporting blocks is provided with a fixing seat, the fixing seat is provided with a plurality of through holes for the pull rope to pass through, the fixing seat is symmetrically slidably connected to a limiting block, and the end of the limiting block is provided with a plurality of protrusions in contact with the limiting block.

[0010] Furthermore, a rotating shaft is rotatably connected to the fixing seat, a cam is provided at the end of the rotating shaft, and a side surface of the cam is in contact with the limiting block.

[0011] Furthermore, a handle is slidably connected to the rotating shaft, the handle is provided with a connecting key slidably connected to the rotating shaft, a third spring is provided between the handle and the fixed seat, a third protrusion is provided at the end of the handle, and the fixed seat is provided with a plurality of third grooves that are plugged into and cooperate with the third protrusion.

[0012] Furthermore, the first airbag and the second airbag are provided with a plurality of sealing strips.

[0013] Furthermore, the first support block and the second support block are respectively provided with a first plug and a second plug, one side of the first plug and the second plug are in contact with the transverse plate, and one side of the first plug and the second plug are provided with a third conical surface in contact with the sealing cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. When the end of the prefabricated insulation pipe needs to be sealed, the first airbag and the second airbag of the corresponding size are respectively sleeved on the outside of the first support blocks and the second support blocks, and then the sealing cover is wrapped on the outside of the outer shell, and the convex part provided on the sealing cover is inserted into the inner side of the pipe body, and then the center rod on the fixing mechanism is moved to the center of the convex part, and the first support block and the second support block are respectively located on both sides of the insulation pipe, and then the fixing mechanism is moved inward until the end of the first support block contacts the convex part, and then the first wedge block is moved on the center rod, and at the same time, the first support blocks are driven to slide radially on the center rod until the first support blocks are in contact with the convex part. The first support blocks are respectively in contact with the first airbags and gradually expand the first airbags so that the first airbags are in contact with the sealing cover, thereby propping up the raised portion of the sealing cover so that it fits with the inner side of the tube body to achieve preliminary blocking of the end of the tube body. In addition, the first support blocks slide on the central rod to block tube bodies with different inner diameters without the need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanisms. In addition, the first support blocks are in indirect contact with the tube body, and the resistance generated by friction fixes the fixing mechanism and the sealing cover on the tube body to prevent the sealing cover from detaching from the tube body, thereby improving the effect of blocking the prefabricated thermal insulation tube. 2. Inject gas into the first inflation hole through an air compressor until the pressure inside the first airbag reaches 0.02MPa, then stop inflating. After the first airbag is filled with gas of a certain pressure, its volume will expand rapidly and further squeeze the sealing cover, thereby filling the gap between the pipe body and the sealing cover, thus completely blocking the inside of the pipe body and preventing mud, sand and rainwater from entering the prefabricated thermal insulation pipe; in addition, the friction between the sealing cover and the pipe body is further increased to prevent the sealing cover from detaching from the pipe body, thereby improving the effect of blocking the prefabricated thermal insulation pipe; 3. Pass the pull rope through several handles in sequence, and then tighten the pull rope. The component force generated by the contact between the pull rope and each second support block will drive the second support block to slide on the horizontal plate, thereby gradually expanding the second airbag, so that the second airbag contacts the sealing cover, and the side of the sealing cover is closed to make it fit with the outer side of the shell, thereby achieving preliminary sealing of the end of the insulation layer, while compensating for the errors caused by the processing of different pipe bodies, and improving the effect of sealing the prefabricated insulation pipe; in addition, by sliding the second support block on the horizontal plate, insulation pipes with different wall thicknesses can be sealed, and there is no need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanism; in addition, by indirectly contacting the shell with several second support blocks, the resistance generated by friction further fixes the fixing mechanism and the sealing cover on the insulation pipe, preventing the sealing cover from detaching from the pipe body, thereby improving the effect of sealing the prefabricated insulation pipe; 4. Inject gas into the second inflation hole through an air compressor until the pressure inside the second airbag reaches 0.02MPa, then stop inflating. After the second airbag is filled with gas of a certain pressure, its volume will expand rapidly, and further squeeze the sealing cover, thereby filling the gap between the outer shell and the sealing cover, and completely blocking the insulation layer to prevent mud, sand, and rainwater from entering the prefabricated insulation pipe; in addition, the friction between the sealing cover and the outer shell is further increased, further preventing the sealing cover from detaching from the insulation pipe, and improving the effect of blocking the prefabricated insulation pipe; 5. Both the first inflation hole and the second inflation hole are arranged on the outer surface, which is convenient for injecting gas into the first airbag and the second airbag later. At the same time, there is no need to continuously wrap the waterproof cloth to seal the pipeline, which greatly improves the efficiency of sealing the prefabricated insulation pipe. At the same time, it also avoids water ingress into the insulation layer, which results in the need for subsequent decontamination, flushing and drying of the corresponding pipe section, further improving the efficiency of replacing and maintaining the prefabricated insulation pipe. 6. When the end of the tube body needs to be sealed, the first support block is driven to slide on the center rod at the same time through the cooperation between the center rod, the first wedge block, the first cone surface, and the second wedge block, thereby changing the positions of several first support blocks at the same time, without the need to push several first support blocks to move separately, further improving the efficiency of sealing the prefabricated insulation tube; and the first airbag is in contact with the sealing cover, so that the convex part of the sealing cover fits with the inner side of the tube body, thereby realizing the sealing of tubes with different inner diameters, without the need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanisms; 7. After adjusting the position of the first wedge block, the first wedge block is restricted from rotating relative to the center rod through the cooperation among the center rod, the fixed block, the second protrusion, the first wedge block, the second groove, the first protrusion, and the first groove, so as to avoid accidentally driving the first wedge block to move, resulting in a change in the position of the first support block, thereby ensuring that the sealing cover is tightly fitted to the pipe body, and further improving the effect of plugging the prefabricated thermal insulation pipe; in addition, when the second protrusion enters the second groove, the cooperation among the ball, the groove, and the second spring will further restrict the movement of the fixed block relative to the first wedge block, and avoid external force pushing the fixed block to move, resulting in the second protrusion provided at its end sliding out of the second groove, thereby ensuring the stability of the overall structure, and further improving the effect of plugging the prefabricated thermal insulation pipe; 8. After tightening the drawstring, the handle, the third spring, the third convex block and the third groove are used to release the restriction on the rotation of the handle on the fixed seat. Then, the fixed seat, the handle, the connecting key, the rotating shaft, the limit block and the convex point are used to restrict the movement of the drawstring on the fixed seat, thereby further improving the stability of the second support block and the effect of sealing the thermal insulation layer. After the pull rope is fixed, the force applied to the handle is cancelled, and the rebound force generated by the compression of the third spring drives the handle to move downward, so that the third protrusion provided at the end thereof slides into the third groove, and the resistance generated by the contact between the third protrusion and the third groove will limit the rotation of the handle on the fixing seat, thereby preventing the handle from being accidentally moved by external force, causing the pull rope to loosen, thereby ensuring the stability of the overall structure and improving the effect of blocking the thermal insulation layer; 9. Several sealing strips are provided on the first airbag and the second airbag. Multiple sealing strips are used to achieve multiple sealing of the insulation layer and the inside of the pipe body, further improving the effect of sealing the prefabricated insulation pipe. At the same time, the first plug and the second plug are respectively in contact with the sealing cover, so that the sealing cover further fits the pipe body and the outer shell, thereby improving the effect of sealing the insulation pipe and preventing mud, sand and rainwater from entering the prefabricated insulation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic structural diagram of the thermal insulation pipe of the present invention.

[0016] Attached Figure 2 It is a structural schematic diagram of the sealing cover of the present invention.

[0017] Attached Figure 3 It is a structural schematic diagram of the center rod of the present invention.

[0018] Attached Figure 4 It is a structural schematic diagram of the fixing block of the present invention.

[0019] Attached Figure 5 It is a schematic structural diagram of the second bump of the present invention.

[0020] Attached Figure 6 It is a structural schematic diagram of the fixing seat of the present invention.

[0021] Attached Figure 7 It is a structural schematic diagram of the cam of the present invention.

[0022] Attached Figure 8 It is a structural schematic diagram of the rotating shaft of the present invention.

[0023] Attached Fig. 9 It is a schematic diagram of the structure of the convex point of the present invention.

[0024] Numbers shown in the accompanying drawings: 1. Insulation tube; 2. Tube body; 3. Insulation layer; 4. Shell; 5. Sealing cover; 6. Raised part; 7. Center rod; 8. First support block; 9. Cross plate; 10. Second support block; 11. First air bag; 12. Second air bag; 13. First inflation hole; 14. Second inflation hole; 15. First wedge block; 16. Fixing ring; 17. Draw rope; 18. first cone surface; 19. second wedge block; 20. second cone surface; 21. fixing block; 22. first groove; 23. first convex block; 24. second groove; 25. second convex block; 26. ball bearing; 27. groove; 28. first spring; 29. Sliding rod; 30. First notch; 31. Second notch; 32. Second spring; 33. fixing seat; 34. through hole; 35. stopper; 36. convex point; 37. rotating shaft; 38. cam; 39. handle; 40. connecting key; 41. third spring; 42. third convex block; 43. third groove; 44. Sealing strip; 45. First plugging; 46. Second plugging; 47. Third cone surface. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0026] The present invention provides a waterproof and dustproof quick plugging device for the port of a directly buried prefabricated thermal insulation pipe, such as Figure 1 , Figure 2 and Figure 3As shown, it includes a plugging mechanism arranged at both ends of the insulation pipe 1, the insulation pipe 1 includes a pipe body 2, an insulation layer 3 and an outer shell 4, the plugging mechanism includes a fixing mechanism and a sealing cover 5 sleeved on both ends of the outer shell 4, the sealing cover 5 simultaneously wraps the pipe body 2, the insulation layer 3 and the end of the outer shell 4, the middle part of the sealing cover 5 is provided with a protrusion 6 in contact with the inner side of the pipe body 2, the fixing mechanism includes a center rod 7, and a plurality of first support blocks 8 are radially slidably connected to the center rod 7. The first support blocks 8 slide on the center rod 7 to block pipe bodies 2 with different inner diameters, without the need to separately set fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanism; The end of the first support block 8 is in contact with the raised portion 6. A transverse plate 9 is provided at the end of the first support block 8. A second support block 10 is slidably connected to the transverse plate 9. In addition, the second support block 10 slides on the transverse plate 9 to seal the insulation pipes 1 with different wall thicknesses, and there is no need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanisms. It also includes a first airbag 11 and a second airbag 12 respectively sleeved on the outside of the plurality of first support blocks 8 and the plurality of second support blocks 10, the first airbag 11 and the second airbag 12 are respectively in contact with the sealing cover 5, and the first airbag 11 and the second airbag 12 are respectively provided with a first inflation hole 13 and a second inflation hole 14, and gas is injected into the first inflation hole 13 by an air compressor until the pressure inside the first airbag 11 reaches 0.02MPa and the inflation is stopped, and after the first airbag 11 is filled with gas of a certain pressure, its volume will expand rapidly, and further squeeze the sealing cover 5, so as to fill the gap between the pipe body 2 and the sealing cover 5, realize the complete blocking of the inside of the pipe body 2, and prevent mud, sand and rainwater from entering the prefabricated insulation pipe 1; In addition, the friction between the sealing cover 5 and the tube body 2 is further increased to prevent the sealing cover 5 from detaching from the tube body 2, thereby improving the effect of blocking the prefabricated thermal insulation pipe 1; the air is injected into the second inflation hole 14 by the air compressor until the pressure inside the second airbag 12 reaches 0.02MPa and the inflation is stopped. After the second airbag 12 is filled with gas of a certain pressure, its volume will expand rapidly and further squeeze the sealing cover 5, thereby filling the gap between the outer shell 4 and the sealing cover 5, achieving complete blocking of the thermal insulation layer 3 and preventing mud, sand and rainwater from entering the prefabricated thermal insulation pipe 1; in addition, the friction between the sealing cover 5 and the outer shell 4 is further increased to further prevent the sealing cover 5 from detaching from the thermal insulation pipe 1, thereby improving the effect of blocking the prefabricated thermal insulation pipe 1; The center rod 7 is provided with a first wedge block 15 that simultaneously drives a plurality of first support blocks 8 to slide radially on the center rod 7. The first wedge block 15 is moved on the center rod 7, and simultaneously drives a plurality of first support blocks 8 to slide radially on the center rod 7 until a plurality of first support blocks 8 are respectively in contact with the first airbags 11, and the first airbags 11 are gradually expanded, so that the first airbags 11 are in contact with the sealing cover 5, thereby propping up the raised portion 6 of the sealing cover 5, so that it fits with the inner side of the tube body 2, and the preliminary blocking of the end of the tube body 2 is achieved; the second support block 10 is provided with The fixing ring 16 also includes a pull rope 17 that passes through several fixing rings 16 in sequence and drives the second support block 10 to slide on the cross plate 9. The component force generated by the contact between the pull rope 17 and each second support block 10 will drive the second support block 10 to slide on the cross plate 9, thereby gradually expanding the second airbag 12, so that the second airbag 12 contacts the sealing cover 5, and the side edges of the sealing cover 5 are closed to make it fit with the outer side of the outer shell 4, thereby achieving preliminary sealing of the end of the insulation layer 3, and at the same time compensating for the errors caused by the processing of different pipe bodies 2, thereby improving the effect of sealing the prefabricated insulation pipe 1.

[0027] Preferably, Figure 2 and Figure 3 As shown, a first conical surface 18 is provided on one side of the first wedge block 15, and the first wedge block 15 is threadedly connected to the center rod 7. A second wedge block 19 is provided on one side of the first supporting block 8, and a second conical surface 20 in contact with the first conical surface 18 is provided on one side of the second wedge block 19. By rotating the first wedge block 15 on the center rod 7, since the first wedge block 15 is threadedly connected to the center rod 7, the first wedge block 15 slides on the center rod 7, and contacts with the second conical surfaces 20 on one side of several second wedge blocks 19 through the first conical surface 18 provided on the first wedge block 15. The component force generated after the contact simultaneously drives the first supporting block 8 to slide on the center rod 7, thereby changing the positions of several first supporting blocks 8 at the same time, and contacts with the sealing cover 5 through the first airbag 11, so that the protrusion 6 of the sealing cover 5 fits with the inner side of the tube body 2, thereby realizing the blocking of tube bodies 2 with different inner diameters, and there is no need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanisms.

[0028] Preferably, Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a fixing block 21 is slidably connected to the center rod 7, a first groove 22 is provided on the center rod 7, a first protrusion 23 slidably connected to the first groove 22 is provided on the fixing block 21, a plurality of second grooves 24 are provided at the end of the first wedge block 15, and a plurality of second protrusions 25 are provided at the end of the fixing block 21 to be plugged and matched with the second grooves 24. After adjusting the position of the first wedge block 15, the fixing block 21 is slid on the center rod 7 so that the second protrusion 25 provided at its end enters the second groove 24 provided on the first wedge block 15. The resistance generated by the contact between the second protrusion 25 and the second groove 24 limits the rotation of the first wedge block 15 relative to the fixing block 21. The resistance generated by the contact between the first protrusion 23 provided on the fixing block 21 and the first groove 22 limits the rotation of the first wedge block 15 relative to the center rod 7, thereby avoiding the first wedge block 15 being accidentally driven to move, resulting in the change of the position of the first supporting block 8, thereby ensuring that the sealing cover 5 is tightly fitted with the pipe body 2, and further improving the effect of plugging the prefabricated thermal insulation pipe 1.

[0029] Preferably, Figure 5 As shown, balls 26 are symmetrically provided on the second protrusion 25, and grooves 27 for plugging and cooperating with the balls 26 are respectively provided on both sides of the second groove 24. A first spring 28 is provided between the two balls 26. When the second protrusion 25 enters the second groove 24, the rebound force generated by the compression of the first spring 28 will drive the two balls 26 to move outward and enter the groove 27. The resistance generated by the contact between the balls 26 and the groove 27 will further limit the movement of the fixed block 21 relative to the first wedge block 15, thereby preventing external force from pushing the fixed block 21 to move, causing the second protrusion 25 provided at its end to slide out of the second groove 24, thereby ensuring the stability of the overall structure and further improving the effect of sealing the prefabricated insulation pipe 1.

[0030] Preferably, Figure 2 and Figure 3As shown, the central rod 7 is provided with a plurality of sliding rods 29 slidably connected with the first support block 8 in the radial direction, which guides the first support block 8 to slide on the central rod 7, thereby ensuring the stability of the overall structure and further improving the effect of blocking the prefabricated thermal insulation pipe 1. The first support block 8 and the second support block 10 are respectively provided with a first notch 30 and a second notch 31 in contact with the first airbag 11 and the second airbag 12, which limit the first airbag 11 and the second airbag 12 to prevent them from falling off from the fixed structure, thereby improving the effect of blocking the prefabricated thermal insulation pipe 1; a second spring 32 is provided between the end of the sliding rod 29 and the first support block 8. When installing the first airbag 11, first press a plurality of first support blocks 8 toward the inside, and then put the first airbag 11 on the first notch 30 of the plurality of first support blocks 8. The rebound force generated after the compression of the second spring 32 will drive the first support block 8 to move toward the outside, so that the first airbag 11 can be put into the first notch 30 of the plurality of first support blocks 8, thereby improving the efficiency of blocking the prefabricated thermal insulation pipe 1.

[0031] Preferably, Figure 6 , Figure 7 and Fig. 9 As shown, one end of the pull rope 17 is fixed on one of the second support blocks 10, one of the second support blocks 10 is provided with a fixing seat 33, the fixing seat 33 is provided with a plurality of through holes 34 for the pull rope 17 to pass through, the fixing seat 33 is symmetrically slidably connected with a limiting block 35, and the end of the limiting block 35 is provided with a plurality of protrusions 36 in contact with the limiting block 35. After tightening the pull rope 17, the limiting block 35 is moved on the fixing seat 33 until the protrusions 36 provided on the end thereof come into contact with the pull rope 17. The friction force generated after the contact will limit the movement of the pull rope 17 on the fixing seat 33, thereby further improving the stability of fixing the second support block 10 and improving the effect of sealing the thermal insulation layer 3.

[0032] Preferably, Figure 6 , Figure 7 and Figure 8 As shown, a rotating shaft 37 is rotatably connected to the fixed seat 33, and a cam 38 is provided at the end of the rotating shaft 37. The side of the cam 38 contacts the limit block 35, and plays a role in sliding the limit block 35 on the fixed seat 33. By rotating the rotating shaft 37 on the fixed seat 33, the cam 38 provided at its end contacts the limit block 35, and drives the limit block 35 to slide on the fixed seat 33, thereby limiting the movement of the pull rope 17 on the fixed seat 33, further improving the stability of fixing the second support block 10, and improving the effect of sealing the thermal insulation layer 3.

[0033] Preferably, Figure 6 , Figure 7 and Figure 8As shown, a handle 39 is slidably connected to the rotating shaft 37, and a connecting key 40 is provided on the handle 39 to be slidably connected to the rotating shaft 37. A third spring 41 is provided between the handle 39 and the fixed seat 33, and a third protrusion 42 is provided at the end of the handle 39. The fixed seat 33 is provided with a plurality of third grooves 43 that are plugged and matched with the third protrusion 42. After tightening the pull rope 17, the handle 39 is moved upward to compress the third spring 41, so that the third protrusion 42 provided at its end slides out of the third groove 43, thereby releasing the restriction on the rotation of the handle 39 on the fixed seat 33. Then, the handle 39 is rotated on the fixed seat 33, and the torque is transmitted to the rotating shaft 37 through the connecting key 40, driving it to rotate on the fixed seat 33, thereby driving the limit block 35 to slide on the fixed seat 33, restricting the movement of the pull rope 17 on the fixed seat 33, further improving the stability of fixing the second support block 10, and improving the effect of sealing the thermal insulation layer 3.

[0034] Preferably, Figure 2 and Figure 3 As shown, a plurality of sealing strips 44 are provided on the first airbag 11 and the second airbag 12 . Multiple sealing strips 44 are used to achieve multiple sealing of the insulation layer 3 and the inside of the tube body 2 , further improving the effect of sealing the prefabricated insulation tube 1 .

[0035] Preferably, Figure 2 and Figure 3 As shown, the first support block 8 and the second support block 10 are respectively provided with a first plug 45 and a second plug 46, one side of the first plug 45 and the second plug 46 are in contact with the cross plate 9, and one side of the first plug 45 and the second plug 46 is provided with a third conical surface 47 in contact with the sealing cover 5. When the fixing mechanism is placed into the end of the thermal insulation pipe 1, the conical surfaces provided at the ends of the first plug 45 and the second plug 46 are respectively in contact with the sealing cover 5, so that the first plug 45 and the second plug 46 can pass through the pipe body 2 and the outer shell 4 smoothly. When the first support block 8 and the second support block 10 move toward the pipe body 2 and the outer shell 4 respectively, the first plug 45 and the second plug 46 will be further squeezed, and the first plug 45 and the second plug 46 will be in contact with the sealing cover 5 respectively, so that the sealing cover 5 can further fit the pipe body 2 and the outer shell 4, thereby improving the effect of sealing the thermal insulation pipe 1 and preventing mud and rainwater from entering the prefabricated thermal insulation pipe 1.

[0036] Example 1 The present invention provides a waterproof and dustproof quick plugging device for the port of a directly buried prefabricated thermal insulation pipe, such as Figure 1 , Figure 2 and Figure 3As shown, when the end of the prefabricated insulation pipe 1 needs to be sealed, the first airbag 11, the second airbag 12 and the sealing cover 5 of the corresponding size are prepared in advance, and then the first airbag 11 and the second airbag 12 of the corresponding size are respectively sleeved on the outside of the plurality of first support blocks 8 and the second support blocks 10, and then the sealing cover 5 is wrapped on the outside of the outer shell 4, and at the same time, the protrusion 6 provided on the sealing cover 5 is inserted into the inner side of the tube body 2, and then the center rod 7 on the fixing mechanism is moved to the center of the protrusion 6, and at the same time, the first support block 8 and the second support block 10 are respectively located on both sides of the insulation pipe 1, and then the fixing mechanism is moved inward until the end of the first support block 8 contacts the protrusion 6, and then the first wedge block 15 is moved on the center rod 7, and at the same time, the plurality of first support The block 8 slides radially on the center rod 7 until several first support blocks 8 are respectively in contact with the first airbags 11, and the first airbags 11 are gradually expanded, so that the first airbags 11 are in contact with the sealing cover 5, thereby propping up the raised portion 6 of the sealing cover 5, making it fit with the inner side of the tube body 2, and realizing the preliminary blocking of the end of the tube body 2. In addition, by sliding the first support block 8 on the center rod 7, the tube bodies 2 with different inner diameters can be blocked, and there is no need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanisms; in addition, by indirectly contacting the tube body 2 through several first support blocks 8, the resistance generated by friction fixes the fixing mechanism and the sealing cover 5 on the tube body 2, preventing the sealing cover 5 from detaching from the tube body 2, thereby improving the effect of blocking the prefabricated thermal insulation pipe 1; Then, the air is injected into the first inflation hole 13 through the air compressor until the pressure inside the first airbag 11 reaches 0.02MPa, and then the inflation is stopped. After the first airbag 11 is filled with gas of a certain pressure, its volume will expand rapidly, and further squeeze the sealing cover 5, so as to fill the gap between the tube body 2 and the sealing cover 5, thereby completely blocking the inside of the tube body 2 and preventing mud, sand and rainwater from entering the prefabricated thermal insulation pipe 1; in addition, the friction between the sealing cover 5 and the tube body 2 is further increased to prevent the sealing cover 5 from detaching from the tube body 2, thereby improving the effect of blocking the prefabricated thermal insulation pipe 1; Subsequently, the pull rope 17 is passed through several handles 39 in sequence, and then the pull rope 17 is tightened. The component force generated by the contact between the pull rope 17 and each second support block 10 drives the second support block 10 to slide on the cross plate 9, thereby gradually expanding the second airbag 12, so that the second airbag 12 contacts the sealing cover 5, and the side of the sealing cover 5 is closed to make it fit with the outer side of the shell 4, thereby achieving preliminary blocking of the end of the insulation layer 3, and at the same time compensating for the error caused by the processing of different pipe bodies 2, thereby improving the effect of blocking the prefabricated insulation pipe 1; in addition, by sliding the second support block 10 on the cross plate 9, the insulation pipes 1 with different wall thicknesses can be blocked, and there is no need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanism; in addition, by indirectly contacting the shell 4 with several second support blocks 10, the resistance generated by friction further fixes the fixing mechanism and the sealing cover 5 on the insulation pipe 1, preventing the sealing cover 5 from detaching from the pipe body 2, thereby improving the effect of blocking the prefabricated insulation pipe 1; Then, the air is injected into the second inflation hole 14 through the air compressor until the pressure inside the second airbag 12 reaches 0.02MPa, and then the inflation is stopped. After the second airbag 12 is filled with gas of a certain pressure, its volume will expand rapidly, and further squeeze the sealing cover 5, so as to fill the gap between the outer shell 4 and the sealing cover 5, thereby completely blocking the thermal insulation layer 3 and preventing mud, sand and rainwater from entering the prefabricated thermal insulation pipe 1; in addition, the friction between the sealing cover 5 and the outer shell 4 is further increased, thereby further preventing the sealing cover 5 from detaching from the thermal insulation pipe 1, and improving the effect of blocking the prefabricated thermal insulation pipe 1; In addition, the first inflation hole 13 and the second inflation hole 14 are both arranged on the outer surface, which is convenient for the subsequent injection of gas into the first airbag 11 and the second airbag 12. At the same time, there is no need to seal the pipeline by continuously wrapping the waterproof cloth, which greatly improves the efficiency of sealing the prefabricated insulation pipe; at the same time, it also avoids water ingress into the insulation layer 3, resulting in the subsequent need for decontamination, flushing, and drying of the corresponding pipe section, further improving the efficiency of replacing and maintaining the prefabricated insulation pipe.

[0037] Example 2 On the basis of Example 1, Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, when the end of the tube body 2 needs to be sealed, the first wedge block 15 is rotated on the center rod 7. Since the first wedge block 15 is threadedly connected to the center rod 7, the first wedge block 15 slides on the center rod 7, and the first cone surface 18 provided on the first wedge block 15 contacts with the second cone surface 20 provided on one side of the plurality of second wedge blocks 19. The component force generated after the contact simultaneously drives the first support block 8 to slide on the center rod 7, thereby simultaneously changing the positions of the plurality of first support blocks 8, and contacts with the sealing cover 5 through the first airbag 11, so that the raised portion 6 of the sealing cover 5 fits with the inner side of the tube body 2, thereby achieving the blocking of the tube bodies 2 with different inner diameters, without the need to separately set up fixing mechanisms of different sizes, thereby reducing the cost required for making the fixing mechanisms; After the position of the first wedge block 15 is adjusted, the fixing block 21 is slid on the center rod 7 so that the second protrusion 25 provided on the end thereof enters the second groove 24 provided on the first wedge block 15. The resistance generated by the contact between the second protrusion 25 and the second groove 24 limits the rotation of the first wedge block 15 relative to the fixing block 21. The resistance generated by the contact between the first protrusion 23 provided on the fixing block 21 and the first groove 22 limits the rotation of the first wedge block 15 relative to the center rod 7, thereby avoiding the first wedge block 15 from being accidentally driven to move, resulting in the first The position of the support block 8 changes, thereby ensuring that the sealing cover 5 fits tightly against the tube body 2, further improving the effect of sealing the prefabricated insulated tube 1; in addition, when the second protrusion 25 enters the second groove 24, the resistance generated by the contact between the ball 26 and the groove 27 will further limit the movement of the fixed block 21 relative to the first wedge block 15, avoiding external force pushing the fixed block 21 to move, causing the second protrusion 25 at its end to slide out of the second groove 24, thereby ensuring the stability of the overall structure and further improving the effect of sealing the prefabricated insulated tube 1.

[0038] Example 3 On the basis of Example 1, Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, after tightening the drawstring 17, the handle 39 is moved upward to compress the third spring 41, so that the third protrusion 42 provided at the end thereof slides out from the third groove 43, thereby releasing the restriction on the rotation of the handle 39 on the fixing seat 33. Then, the handle 39 is rotated on the fixing seat 33, and the torque is transmitted to the rotating shaft 37 through the connecting key 40, so that it is driven to rotate on the fixing seat 33, so that the cam 38 provided at the end thereof contacts the limit block 35, and the limit block 35 is driven to slide on the fixing seat 33 until the protrusion 36 provided at the end thereof contacts the drawstring 17. The friction force generated after the contact will limit the movement of the drawstring 17 on the fixing seat 33, thereby further improving the stability of fixing the second support block 10 and improving the effect of sealing the thermal insulation layer 3. After the rear pull rope 17 is fixed, the force applied to the handle 39 is removed, and the handle 39 is driven to move downward by the rebound force generated by the compression of the third spring 41, so that the third protrusion 42 provided at its end slides into the third groove 43. The resistance generated by the contact between the third protrusion 42 and the third groove 43 will limit the rotation of the handle 39 on the fixing seat 33, thereby preventing the handle 39 from being accidentally moved by external force and causing the pull rope 17 to loosen, thereby ensuring the stability of the overall structure and improving the effect of sealing the thermal insulation layer 3.

[0039] Example 4 On the basis of Example 1, Figure 2 and Figure 3 As shown, a plurality of sealing strips 44 are provided on the first airbag 11 and the second airbag 12, which are sealed by a plurality of separate second airbags 12 and are respectively in contact with the sealing cover 5 through the first plug 45 and the second plug 46, so that the sealing cover 5 further fits the pipe body 2 and the outer shell 4, thereby improving the effect of sealing the thermal insulation pipe 1 and preventing mud, sand and rainwater from entering the prefabricated thermal insulation pipe 1.

Claims

1. A waterproof and dustproof quick plugging device for the port of a directly buried prefabricated insulated pipe, comprising a plugging mechanism arranged at both ends of an insulated pipe (1), wherein the insulated pipe (1) comprises a pipe body (2), an insulating layer (3) and an outer shell (4), characterized in that: The blocking mechanism comprises a fixing mechanism and a sealing cover (5) sleeved on both ends of the outer shell (4), the sealing cover (5) simultaneously wrapping the tube body (2), the thermal insulation layer (3) and the end of the outer shell (4), the middle part of the sealing cover (5) is provided with a protrusion (6) in contact with the inner side of the tube body (2), the fixing mechanism comprises a center rod (7), a plurality of first support blocks (8) are slidably connected to the center rod (7) in a radial direction, the end of the first support block (8) is in contact with the protrusion (6), the end of the first support block (8) is provided with a transverse plate (9), the transverse plate (9) is slidably connected to the second support block (10), and further comprises a plurality of first support blocks (8) sleeved on the plurality of first support blocks (8) ) and a first airbag (11) and a second airbag (12) outside a plurality of second support blocks (10), the first airbag (11) and the second airbag (12) are respectively in contact with the sealing cover (5), the first airbag (11) and the second airbag (12) are respectively provided with a first inflation hole (13) and a second inflation hole (14), the central rod (7) is provided with a first wedge block (15) for simultaneously driving the plurality of first support blocks (8) to slide radially on the central rod (7), the second support block (10) is provided with a fixing ring (16), and also includes a pull rope (17) which passes through the plurality of fixing rings (16) in sequence and drives the second support block (10) to slide on the transverse plate (9).

2. A waterproof and dustproof rapid plugging device for the port of a direct-buried prefabricated thermal insulation pipe according to claim 1, characterized in that: A first conical surface (18) is provided on one side of the first wedge block (15), the first wedge block (15) is threadedly connected to the center rod (7), a second wedge block (19) is provided on one side of the first supporting block (8), and a second conical surface (20) in contact with the first conical surface (18) is provided on one side of the second wedge block (19).

3. A waterproof and dustproof rapid plugging device for the port of a direct-buried prefabricated thermal insulation pipe according to claim 2, characterized in that: A fixing block (21) is slidably connected to the center rod (7), a first groove (22) is provided on the center rod (7), a first protrusion (23) slidably connected to the first groove (22) is provided on the fixing block (21), a plurality of second grooves (24) are provided at the end of the first wedge-shaped block (15), and a plurality of second protrusions (25) are provided at the end of the fixing block (21) and are plugged into and matched with the second grooves (24).

4. A waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe according to claim 3, characterized in that: The second protrusion (25) is symmetrically provided with balls (26), and grooves (27) for plugging and cooperating with the balls (26) are respectively provided on both sides of the second groove (24), and a first spring (28) is provided between the two balls (26).

5. According to claim 1, a waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe is characterized in that: The central rod (7) is provided with a plurality of sliding rods (29) in radial direction and slidably connected to the first supporting block (8); the first supporting block (8) and the second supporting block (10) are provided with a first notch (30) and a second notch (31) respectively, which are in contact with the first airbag (11) and the second airbag (12); and a second spring (32) is provided between the end of the sliding rod (29) and the first supporting block (8).

6. A waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe according to claim 1, characterized in that: One end of the pull rope (17) is fixed to one of the second support blocks (10), one of the second support blocks (10) is provided with a fixing seat (33), the fixing seat (33) is provided with a plurality of through holes (34) for the pull rope (17) to pass through, the fixing seat (33) is symmetrically slidably connected to a limit block (35), and the end of the limit block (35) is provided with a plurality of protrusions (36) in contact with the limit block (35).

7. A waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe according to claim 6, characterized in that: A rotating shaft (37) is rotatably connected to the fixing seat (33), a cam (38) is provided at the end of the rotating shaft (37), and a side surface of the cam (38) is in contact with the limiting block (35).

8. A waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe according to claim 7, characterized in that: A handle (39) is slidably connected to the rotating shaft (37), and a connecting key (40) is provided on the handle (39) and is slidably connected to the rotating shaft (37). A third spring (41) is provided between the handle (39) and the fixing seat (33), and a third protrusion (42) is provided at the end of the handle (39). The fixing seat (33) is provided with a plurality of third grooves (43) that are plugged and matched with the third protrusions (42).

9. A waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe according to claim 1, characterized in that: A plurality of sealing strips (44) are provided on the first airbag (11) and the second airbag (12).

10. A waterproof and dustproof rapid plugging device for the port of a directly buried prefabricated thermal insulation pipe according to claim 1, characterized in that: The first supporting block (8) and the second supporting block (10) are provided with a first plug (45) and a second plug (46) respectively, one side of the first plug (45) and the second plug (46) are in contact with the transverse plate (9), and one side of the first plug (45) and the second plug (46) are provided with a third conical surface (47) in contact with the sealing cover (5).

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