Flexible reinforced joint structure for a pipe and method for reinforcing a joint

Abstract

The application discloses a flexible reinforcing joint structure of a pipeline and a joint reinforcing method. The flexible reinforcing joint structure of the pipeline is characterized in that a first pipe body and a second pipe body are inserted into a sleeve from two ends of the sleeve and constitute a pipeline, a gap of the first pipe body and the second pipe body in the sleeve is a pipe joint, and a flexible joint filler is arranged in the pipe joint; a rubber plate is arranged in the interior of the pipeline, two ends of the rubber plate are fixed on the first pipe body and the second pipe body respectively, and the rubber plate covers the pipe joint and the flexible joint filler. The joint reinforcing method of the pipeline comprises the following steps: entering the installed pipeline, filling the flexible joint filler into the pipe joint, and covering the pipe joint and the flexible joint filler in the pipe joint with the rubber plate. The joint reinforcing method can flexibly reinforce the installed pipeline, so that the reinforced pipeline joint has good deformation adaptability, can absorb deformation within a certain range, and maintains sealing performance and structural stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline connection, in particular to a flexible reinforced joint structure of a pipeline and a joint reinforcing method. BACKGROUND

[0002] Glass fiber reinforced plastic continuous winding sand wrapped pipe (CWFP pipe) has been widely used in urban water supply and drainage, seawater intake and drainage, sewage transportation, long-distance water diversion and other pipeline engineering. Some construction projects have put forward the requirement of redundant flexible reinforcement of the existing CWFP pipe sleeve joint without affecting the sealing performance of the original sleeve joint. Therefore, a reinforced sleeve joint scheme is needed to meet the requirements of the construction project. SUMMARY

[0003] The present application aims to overcome the above-mentioned deficiencies and provide a flexible reinforced joint structure of a pipeline that can maintain sealing after deformation and a joint reinforcing method that can flexibly reinforce the pipeline.

[0004] To achieve the above-mentioned purpose, the technical solution of the present application is: a flexible reinforced joint structure of a pipeline, comprising a first pipe body, a second pipe body, a flexible joint filler, a sleeve, a rubber plate and a protective plate.

[0005] The first pipe body and the second pipe body are inserted into the sleeve from both ends of the sleeve and form a pipeline, the gap of the first pipe body and the second pipe body in the sleeve is a pipe joint, and the flexible joint filler is arranged in the pipe joint.

[0006] The rubber plate is arranged inside the pipeline, both ends of the rubber plate are fixed on the first pipe body and the second pipe body respectively, and the rubber plate covers the pipe joint and the flexible joint filler.

[0007] The protective plate is arranged on the inner side of the rubber plate and covers the rubber plate, one end of the protective plate is fixed on the inner wall of the first pipe body or the second pipe body, and the other end of the protective plate is not fixed.

[0008] When the pipeline joint position is deformed, the width of the pipe joint changes at the same time, the flexible joint filler can deform flexibly with the change of the pipe joint, and the sealing effect of the pipe joint position is always maintained. The rubber plate can further seal the pipe joint position, and the rubber plate can also deform synchronously when the pipeline joint position is deformed. The rubber plate and the flexible joint filler can produce flexible internal reinforcement of the pipeline joint position. One end of the protective plate is fixed, and the other end is free, the water flow pressure in the pipeline can press the protective plate towards the rubber plate, so that the rubber plate and the inner wall of the pipeline are closer, and the sealing effect is better. When the pipeline joint position is deformed, the protective plate moves with the fixed end of the pipeline, and does not resist the deformation of the pipeline, and does not affect the protection and sealing effect of the rubber plate by the protective plate.

[0009] The joint position of the pipeline has a sleeve, a flexible filler, a rubber plate, a multiple reinforcement and sealing structure of a protective plate, forming a "hydraulic sealing + flexible internal reinforcement" multiple redundant system, the functions are complementary and there is no direct dependence, even if some of the sealing structures fail due to pipeline deformation, the remaining sealing structures can still maintain internal pressure sealing.

[0010] Preferably, it also includes an isolation layer, which is arranged between the rubber plate and the protective plate. The protective plate is fixed at one end and free at the other end. When the pipeline is watered or deformed, the protective plate will rub with the rubber plate, and the constantly moving protective plate is easy to be stuck by the rubber plate. The isolation layer can isolate the protective plate and the rubber plate, so that the protective plate can move freely without being stuck by the rubber plate.

[0011] Preferably, it also includes a first fixed layer and a second fixed layer; the two ends of the rubber plate are fixed on the first pipe body and the second pipe body by sealing glue, and the sealing glue overflowed from the two ends of the rubber plate forms a first adhesive body and a second adhesive body respectively; the first fixed layer is attached to the inner wall of the first pipe body and one end of the rubber plate, and the first fixed layer covers the first adhesive body; the second fixed layer is attached to the inner wall of the second pipe body and the other end of the rubber plate, and the second fixed layer covers the second adhesive body.

[0012] The first adhesive body and the second adhesive body can seal the gap between the two ends of the rubber plate and the pipeline, and the first fixed layer and the second fixed layer are used to reinforce and fix the two ends of the rubber plate on the first pipe body and the second pipe body, so that the sealing effect between the rubber plate and the pipeline can be maintained even if the rubber plate is deformed.

[0013] Preferably, it also includes a first geotextile, a first flexible sealing body, a second geotextile, a second flexible sealing body, and a packing tape.

[0014] The first flexible sealing body is arranged at the outer end of the gap between the sleeve and the first pipe body, the first geotextile is wound around one end of the sleeve and the outer wall of the first pipe body, and the first geotextile covers the first flexible sealing body; the packing tape is wound around the first pipe body and the sleeve at the corresponding positions of the first geotextile.

[0015] The second flexible sealing body is arranged at the outer end of the gap between the sleeve and the second pipe body, the second geotextile is wound around the other end of the sleeve and the outer wall of the second pipe body, and the second geotextile covers the second flexible sealing body; the packing tape is wound around the second pipe body and the sleeve at the corresponding positions of the second geotextile.

[0016] The first flexible sealing body and the second flexible sealing body are used to reinforce the sealing effect of the sleeve and the first pipe body and the second pipe body, and the first geotextile and the second geotextile can isolate the first adhesive body and the second adhesive body from the external environment of the pipeline.

[0017] Preferably, the sleeve comprises a body and a rubber sealing layer, the rubber sealing layer is arranged on the inner wall of the body, the middle part of the rubber sealing layer is provided with an inwardly protruding limiting ring body, the inner wall of the rubber sealing layer is provided with a sealing lip group on both sides of the limiting ring body, and the sealing lip group comprises at least two sealing lips which are distributed along the axial direction of the sleeve and whose end portions are in close contact with the outer wall of the first pipe body or the second pipe body.

[0018] In the external pressure working condition, the sealing lip, the first flexible sealing body, the second flexible sealing body, the first geotextile and the second geotextile constitute a “compression sealing + sealing glue + environmental isolation” layered protection, each layer independently plays a role, when the sealing lip of the sleeve fails, the external strengthening measures can provide a supplementary protection barrier to ensure the sealing performance and structural stability of the pipeline under complex working conditions.

[0019] Preferably, the rubber plate is a ternary ethylene-propylene rubber, the minimum distance between the sealing glue at both ends of the rubber plate is greater than 50 mm, and the first fixed layer and the second fixed layer are both made of glass steel paste.

[0020] A pipe joint reinforcing method comprises the following steps:

[0021] Enter the installed pipeline, the pipeline comprising a first pipe body, a second pipe body and a sleeve, the first pipe body and the second pipe body are inserted into the sleeve from both ends of the sleeve, and the gap of the first pipe body and the second pipe body in the sleeve is a pipe joint; fill the flexible caulking body into the pipe joint, cover the rubber plate on the pipe joint and the flexible caulking body in the pipe joint, and the both ends of the rubber plate are adhered to the inner wall of the first pipe body and the inner wall of the second pipe body by the sealing glue;

[0022] The glass steel paste is applied on both ends of the rubber plate; the glass steel at one end of the rubber plate extends to the inner wall of the first pipe body, and forms a first fixed layer after solidification; the glass steel at the other end of the rubber plate extends to the inner wall of the second pipe body, and forms a second fixed layer after solidification;

[0023] After the glass steel at both ends of the rubber plate is solidified, cover the isolation layer on the rubber plate, and the both ends of the isolation layer are placed on the first fixed layer and the second fixed layer;

[0024] Cover the protection plate on the isolation layer, and one end of the protection plate extends to the inner wall of the second pipe body and is fixed with the second pipe body.

[0025] Preferably, the method further comprises the following steps:

[0026] Use the jointing glue to joint the gap at both ends of the sleeve, the jointing glue is a flexible single-component polyurethane sealant or a double-component polysulfide sealant; the jointing glue in the gap between the sleeve and the first pipe body forms a first flexible sealing body after solidification, and the jointing glue in the gap between the sleeve and the second pipe body forms a second flexible sealing body after solidification;

[0027] The first geotextile covers the first flexible sealing body, and two ends of the first geotextile extend to the outer wall of the first pipe body and the outer wall of the sleeve respectively; and the packing belt is wound around the first pipe body and the sleeve at the corresponding positions of the first pipe body and the sleeve of the first geotextile respectively.

[0028] The second geotextile covers the second flexible sealing body, and two ends of the second geotextile extend to the outer wall of the second pipe body and the outer wall of the sleeve respectively; and the packing belt is wound around the second pipe body and the sleeve at the corresponding positions of the second pipe body and the sleeve of the second geotextile respectively.

[0029] Preferably, the rubber plate is EPDM (ethylene propylene diene monomer) rubber, the width of the rubber plate is 150 mm, and the thickness of the rubber plate is 2 mm; the sealing glue is two-component polysulfide sealing paste; the isolation layer is a polyester film; the width of the first fixed layer covering the rubber plate and the first pipe body is 30-40 mm; and the width of the second fixed layer covering the rubber plate and the second pipe body is 30-40 mm.

[0030] The two-component polysulfide sealing paste, the EPDM (ethylene propylene diene monomer) rubber plate, and the single-component polyurethane sealing glue all have good flexibility, water resistance, weather resistance, and chemical corrosion resistance. The two-component polysulfide sealing paste has outstanding waterproof performance, and the sealing life of the two-component polysulfide sealing paste in resisting seawater corrosion is affected by multiple factors such as material formula, environmental conditions, and construction process, but the two-component polysulfide sealing paste can serve for decades in marine engineering through reasonable design and construction. The EPDM rubber plate has a breaking elongation of more than 300%, can effectively absorb joint and seam deformation, and has an adhesive strength to the pipeline that is greater than the strength of the rubber plate base material. The single-component polyurethane sealing glue can be cured in a humid environment, has a curing time of less than or equal to 48 hours, and has high construction feasibility and can maintain the performance of not cracking even in the presence of misalignment, and these material characteristics jointly guarantee the sealing performance and service life of the joint.

[0031] By adopting the technical scheme, the pipeline joint can be sealed by the inner sealing layer and the outer sealing layer under internal and external pressure conditions, and the flexible sealing body is used to fill and seal the pipe bodies.

[0032] Under the internal pressure condition, the inner sealing layer is flexibly sealed by the rubber plate, and the protection plate is used to protect the inner sealing layer, and the sleeve of the outer sealing layer is used to realize hydraulic sealing with the first pipe body and the second pipe body by the lip-shaped sealing, so that the pipeline joint position forms a "hydraulic sealing + flexible inner reinforcement" multiple redundant system. Even if part of the sealing measures fail, the remaining sealing structure can still maintain internal pressure sealing, and the functions are complementary and have no direct dependence on the external pressure condition.

[0033] In the external pressure working condition, the sealing lip in the sleeve, the hook joint seal at both ends of the sleeve and the geotextile constitute a “compression seal + sealant and environmental isolation” layered protection, each layer independently plays a role, when the external sealing of the sleeve fails, the external strengthening measures can provide a supplementary protective barrier to ensure the sealing performance and structural stability of the pipeline under complex working conditions.

[0034] The joint strengthening method of the present application can flexibly strengthen the installed pipeline, so that the strengthened pipeline joint has good deformation adaptability and can absorb deformation within a certain range to maintain sealing performance and structural stability. The present application further improves the ability of the joint to resist external pressure leakage and internal pressure leakage on the basis of the existing sleeve joint, without affecting the sealing ability of the original sleeve joint, achieving double insurance flexible strengthening.

[0035] The reinforced joint structure of the present application not only applies to water supply and drainage project pipeline engineering, but also has important reference and application value for seawater intake and drainage engineering, pipeline engineering for corrosive medium transportation and engineering fields with high requirements for pipeline sealing and structural stability, which can effectively improve the reliability and safety of the pipeline system. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of embodiment 1 of the present application;

[0037] Figure 2 is a structural schematic diagram of embodiment 2 of the present application;

[0038] Figure 3 is a partial structural schematic diagram of embodiment 2 of the present application.

[0039] MAIN REFERENCE MARK EXPLANATION:

[0040] First pipe body 1; second pipe body 2; rubber plate 31; isolation layer 32; protection plate 33; first fixing layer 34; second fixing layer 35; first adhesive body 36; second adhesive body 37; flexible joint filler body 4; sleeve 5; body 51; rubber sealing layer 52; sealing lip 521; limiting ring body 522; pipe joint 6; first flexible sealing body 71; second flexible sealing body 72; first geotextile 73; second geotextile 74; packing tape 75. DETAILED DESCRIPTION

[0041] The present application will be further described below in combination with the drawings and specific embodiments.

[0042] Embodiment 1:

[0043] As shown in Figure 1 , a joint strengthening method of a pipeline, comprising the following steps:

[0044] S1 enters the installed and backfilled pipe. The pipe includes a first pipe body 1, a second pipe body 2, and a sleeve 5. The first pipe body 1 and the second pipe body 2 are inserted into the sleeve 5 from both ends. The sleeve 5 includes a body 51 and a rubber sealing layer 52. The rubber sealing layer 52 is located on the inner wall of the body 51. The inner wall of the rubber sealing layer 52 is provided with a sealing lip assembly. The sealing lip assembly includes at least two sealing lips 521 distributed along the axial direction of the sleeve 5. The ends of the sealing lips are in close contact with the outer walls of the first pipe body 1 and the second pipe body 2. The gap between the first pipe body 1 and the second pipe body 2 inside the sleeve 5 is the pipe joint 6.

[0045] The flexible sealant 4 is filled into the entire circumference of the pipe joint 6. The flexible sealant 4 is a flexible two-component polysulfide sealant.

[0046] S2 uses a 150mm wide and 2mm thick EPDM (ethylene propylene diene monomer) rubber sheet 31 to cover the pipe joint 6 and the flexible sealant 4 inside the pipe joint 6. The two ends of the rubber sheet 31 are respectively glued to the inner walls of the first pipe 1 and the second pipe 2 with sealant. The sealant is an adhesive or a two-component polysulfide sealant, distributed at both ends of the rubber sheet with a width of 30-40mm, and leaving a gap of more than 50mm without sealant in the middle of the rubber sheet. The middle of the rubber sheet is not glued and can deform freely.

[0047] S3 involves attaching fiberglass reinforced plastic (FRP) to both ends of the rubber sheet. FRP is a mixture of glass fiber and resin. The FRP at one end of the rubber sheet 31 extends to the inner wall of the first pipe 1, forming a first fixing layer 34 after curing. The FRP at the other end of the rubber sheet 31 extends to the inner wall of the second pipe 2, forming a second fixing layer 35 after curing. The first fixing layer 34 and the second fixing layer 35 reinforce the ends of the rubber sheet and isolate the ends of the rubber sheet from the fluid inside the pipe.

[0048] After the fiberglass at both ends of the rubber sheet 31 has cured, the isolation layer 32 is placed over the rubber sheet 31, with both ends of the isolation layer 32 resting on the first fixing layer 34 and the second fixing layer 35, respectively. The isolation layer is a polyester film.

[0049] S5 involves applying fiberglass to the isolation layer, which then cures to form a protective plate. The protective plate covers the isolation layer, with one end extending to the inner wall of the second tube 2 and fixed thereto. This results in one end of the protective plate being fixed while the other end remains free.

[0050] After the water flows from the second pipe body 2 to the first pipe body 1, the protective plate presses down on the rubber plate under the action of the water flow, thereby improving the sealing effect of the rubber plate on the joint of the pipe body.

[0051] When the pipe joint deforms, the rubber plate also deforms accordingly, with one end of the protective plate remaining free and not requiring deformation. Even after the pipe deforms, the reinforced internal sealing structure can still maintain its sealing effect.

[0052] Example 2:

[0053] like Figures 2-3 As shown, the present invention provides a flexible reinforced joint structure for a pipeline, comprising a first pipe body 1, a second pipe body 2, a flexible sealant 4, a sleeve 5, a rubber plate 31, an isolation layer 32, a protective plate 33, a first fixing layer 34, a second fixing layer 35, a first geotextile 73, a first flexible sealing body 71, a second geotextile 74, a second flexible sealing body 72, and a packing strap 75.

[0054] The first pipe body 1 and the second pipe body 2 are respectively inserted into the sleeve 5 from both ends of the sleeve to form a pipe. The sleeve 5 includes a body 51 and a rubber sealing layer 52. The rubber sealing layer 52 is disposed on the inner wall of the body 51. A limiting ring 522 protruding inward is provided in the middle of the rubber sealing layer 52. Sealing lip groups are provided on both sides of the limiting ring 522 on the inner wall of the rubber sealing layer 52. The sealing lip groups include at least two sealing lips 521 distributed along the axial direction of the sleeve. The ends of the sealing lips are in close contact with the outer wall of the first pipe body 1 or the second pipe body 2. The gap between the first pipe body 1 and the second pipe body 2 in the sleeve is the pipe joint 6. A flexible sealant 4 is disposed in the pipe joint 4. The flexible sealant 4 is a flexible two-component polysulfide sealant.

[0055] A rubber sheet 31 is installed inside the pipe, with its two ends fixed to the first pipe body 1 and the second pipe body 2, respectively. The rubber sheet 31 covers the pipe joint 6 and the flexible sealant 4. The rubber sheet is made of EPDM (ethylene propylene diene monomer) rubber. The two ends of the rubber sheet 31 are respectively adhered to the inner walls of the first pipe body 1 and the second pipe body 2 using sealant. The sealant is an adhesive or a two-component polysulfide sealant, distributed at both ends of the rubber sheet with a width of 30-40 mm, and leaving a gap of more than 50 mm without sealant in the middle of the rubber sheet. The middle of the rubber sheet is unbonded and can deform freely.

[0056] Sealant overflows from both ends of the rubber plate 31 to form a first adhesive body 36 and a second adhesive body 37, respectively; a first fixing layer 34 is attached to the inner wall of the first tube 1 and one end of the rubber plate 31, covering the first adhesive body 36. A second fixing layer 35 is attached to the inner wall of the second tube 2 and the other end of the rubber plate 31, covering the second adhesive body 37.

[0057] A protective plate 33 is disposed inside the rubber sheet and covers the rubber sheet, and an isolation layer 32 is disposed between the rubber sheet 31 and the protective plate 33. The isolation layer 32 is a polyester film. One end of the protective plate 33 is fixed to the inner wall of the first tube 1 or the second tube 2, and the other end of the protective plate 33 is not fixed, forming a free end.

[0058] The first flexible sealing body 71 is arranged at the outer end of the gap between the sleeve 5 and the first pipe body 1, the first geotextile 73 is wound around the one end of the sleeve and the outer wall of the first pipe body, and the first geotextile 73 covers the first flexible sealing body 71; the first geotextile 73 is provided with a packing tape 75 at the corresponding positions of the first pipe body 1 and the sleeve 5; the packing tape 75 binds the first geotextile on the first pipe body 1 and the sleeve 5, the first geotextile 73 covers the first flexible sealing body 71 to isolate it from the outside world, so as to avoid the intrusion of external substances. The first flexible sealing body is used to strengthen the sealing of the sleeve and the first pipe body.

[0059] The second flexible sealing body 72 is arranged at the outer end of the gap between the sleeve 5 and the second pipe body, the second geotextile 74 is wound around the other end of the sleeve 5 and the outer wall of the second pipe body 2, and the second geotextile 74 covers the second flexible sealing body 72; the second geotextile 74 is provided with a packing tape 75 at the corresponding positions of the second pipe body 2 and the sleeve 5.

[0060] A pipe joint reinforcing method, comprising the following steps:

[0061] S1: Enter the installed pipe which has not been backfilled. The pipe comprises a first pipe body 1, a second pipe body 2, and a sleeve 5, the first pipe body 1 and the second pipe body 2 are inserted into the sleeve 5 from two ends of the sleeve 5, the sleeve 5 comprises a body 51 and a rubber sealing layer 52, the rubber sealing layer 52 is arranged on the inner wall of the body 51, the inner wall of the rubber sealing layer 52 is provided with a sealing lip group, the sealing lip group comprises at least two sealing lips 521 which are distributed along the axial direction of the sleeve 5, and the end of the sealing lip abuts against the outer wall of the first pipe body 1 and the second pipe body 2. The gap of the first pipe body 1 and the second pipe body 2 in the sleeve 5 is a pipe joint 6.

[0062] S2: Fill the flexible joint filling body 4 into the pipe joint 6 in a whole circle, and the flexible joint filling body 4 is a flexible two-component polysulfide sealing paste.

[0063] S2: Cover the pipe joint 6 and the flexible joint filling body 4 in the pipe joint 6 with an EPDM (ethylene propylene diene) rubber plate 31 with a width of 150 mm and a thickness of 2 mm, and the two ends of the rubber plate 31 are adhered to the inner walls of the first pipe body 1 and the second pipe body 2 respectively by using a sealant. The sealant is an adhesive or a two-component polysulfide sealing paste, the sealant is distributed on the two ends of the rubber plate with a width of 30-40 mm, and a width without sealant of more than 50 mm is reserved in the middle of the rubber plate. The middle of the rubber plate is not adhered and can deform freely.

[0064] S3: Apply glass fiber reinforced plastic (GFRP) paste on both ends of the rubber plate 31. The GFRP is a mixture of glass fibers and resin. The GFRP on one end of the rubber plate 31 extends to the inner wall of the first pipe body 1, and after curing forms a first fixing layer 34. The GFRP on the other end of the rubber plate 31 extends to the inner wall of the second pipe body 2, and after curing forms a second fixing layer 35. The first fixing layer 34 and the second fixing layer 35 can strengthen the two ends of the rubber plate and isolate the two ends of the rubber plate from the fluid inside the pipe.

[0065] S4: After the GFRP on both ends of the rubber plate 31 is cured, cover the rubber plate 31 with a separation layer 32, and the two ends of the separation layer 32 are placed on the first fixing layer 34 and the second fixing layer 35 respectively. The separation layer is a polyester film.

[0066] S5: Apply GFRP paste on the separation layer, and after curing, form a protective plate. The protective plate covers the separation layer, and one end of the protective plate extends to the inner wall of the second pipe body 2 and is fixed with the second pipe body 2. In this way, one end of the protective plate is fixed, and the other end is free.

[0067] S6: Use jointing glue to joint the gaps at both ends of the sleeve. The jointing glue is a flexible single-component polyurethane sealant or a two-component polysulfide sealant. After the jointing glue in the gaps between the sleeve and the first pipe body is cured, a first flexible seal 71 is formed, and after the jointing glue in the gaps between the sleeve and the second pipe body is cured, a second flexible seal 72 is formed.

[0068] S7: Cover the first flexible seal 71 with a first geotextile 73, and the two ends of the first geotextile 73 extend to the outer wall of the first pipe body 1 and the outer wall of the sleeve 5 respectively. Wrap the first geotextile 73 with a packing tape 75 at the corresponding positions of the first pipe body 1 and the sleeve 5.

[0069] Cover the second flexible seal 72 with a second geotextile 74, and the two ends of the second geotextile 74 extend to the outer wall of the second pipe body 2 and the outer wall of the sleeve 5 respectively. Wrap the second geotextile 74 with a packing tape 75 at the corresponding positions of the second pipe body 2 and the sleeve 5.

[0070] The reinforcing structure and method of the present application realizes layered redundancy design under internal and external pressure conditions. Under internal pressure conditions, the sleeve joint lip seal and flexible internal reinforcement form a "hydraulic seal + flexible internal reinforcement" multiple redundancy system. Even if part of the sealing measures such as EPDM rubber plate and two-component polysulfide sealant fail, the remaining sealing structure can still maintain internal pressure sealing, with complementary functions and no direct dependence. Under external pressure conditions, the outer sealing lip, external sealant, and geotextile form a "adhesive seal + sealant and environmental isolation" layered protection, with each layer independently functioning. When the external sealing lip of the sleeve joint fails, the external reinforcement measures can provide additional protective barriers to ensure the sealing and structural stability of the pipeline under complex conditions.

[0071] The selected two-component polysulfide sealing paste, EPDM rubber plate, single-component polyurethane sealant and other materials have good flexibility, water resistance, weather resistance and chemical corrosion resistance. The two-component polysulfide sealing paste has outstanding waterproof performance, and the sealing life of the material formula, environmental conditions, construction process and other factors are affected by the material formula, environmental conditions, construction process and other factors, but through reasonable design and construction, it can serve in marine engineering for decades. The elongation at break of the EPDM rubber plate is more than 300%, which can effectively absorb the deformation of the joint and the bonding strength between the pipeline and the rubber plate is greater than the strength of the rubber plate base material. The single-component polyurethane sealant can be cured in wet conditions, the curing time is less than or equal to 48h, and the construction feasibility is high. In the presence of a fault, it can also maintain the performance of not cracking, and these material properties jointly guarantee the sealing performance and service life of the joint.

[0072] The reinforcing structure and method of the application not only apply to the pipeline engineering of water supply and drainage projects, but also have important reference and application value in the fields of seawater intake and drainage engineering, pipeline engineering involving the transportation of corrosive media and engineering fields with high requirements for pipeline sealing and structural stability, which can effectively improve the reliability and safety of the pipeline system.

[0073] The above is only a preferred embodiment of the application, and cannot limit the scope of the application. Any equivalent changes and decorations made within the scope of the application shall still belong to the scope covered by the application.

Claims

1. A flexible reinforced joint structure for a pipe, characterized by The utility model provides a pipeline jointing structure, which comprises a first pipe body, a second pipe body, a flexible filling body, a sleeve, a rubber plate, a protective plate, a first geotextile, a first flexible sealing body, a second geotextile, a second flexible sealing body and a packing tape. The first pipe body and the second pipe body are inserted into the sleeve from two ends of the sleeve and form a pipeline, and a gap in the sleeve is a pipe joint. The rubber plate is arranged inside the pipeline, and two ends of the rubber plate are fixed on the first pipe body and the second pipe body respectively, and the rubber plate covers the pipe joint and the flexible filling body. The protective plate is arranged on the inner side of the rubber plate and covers the rubber plate, one end of the protective plate is fixed on the inner wall of the first pipe body or the second pipe body, and the other end of the protective plate is not fixed. The first flexible sealing body is arranged at the outer end of the gap between the sleeve and the first pipe body, the first geotextile is wound around one end of the sleeve and the outer wall of the first pipe body, and the first geotextile covers the first flexible sealing body; the first geotextile is provided with the packing tape at positions corresponding to the first pipe body and the sleeve. The second flexible sealing body is arranged at the outer end of the gap between the sleeve and the second pipe body, the second geotextile is wound around the other end of the sleeve and the outer wall of the second pipe body, and the second geotextile covers the second flexible sealing body; the second geotextile is provided with the packing tape at positions corresponding to the second pipe body and the sleeve.

2. A flexible pipe reinforcement joint structure according to claim 1, characterised in that, The utility model further comprises an isolation layer arranged between the rubber plate and the protective plate.

3. A flexible pipe reinforcement joint structure according to claim 1, wherein, The utility model further comprises a first fixing layer and a second fixing layer; the two ends of the rubber plate are fixed on the first pipe body and the second pipe body by means of sealing glue, the sealing glue overflows from the two ends of the rubber plate to form a first adhesive body and a second adhesive body respectively; the first fixing layer is attached to the inner wall of the first pipe body and one end of the rubber plate, and the first fixing layer covers the first adhesive body; the second fixing layer is attached to the inner wall of the second pipe body and the other end of the rubber plate, and the second fixing layer covers the second adhesive body.

4. A flexible pipe reinforcement joint structure according to claim 1, wherein The sleeve comprises a body and a rubber sealing layer, the rubber sealing layer is arranged on the inner wall of the body, the middle part of the rubber sealing layer is provided with a limiting ring body protruding inward, the inner wall of the rubber sealing layer is provided with a sealing lip group on both sides of the limiting ring body, the sealing lip group comprises at least two sealing lips distributed along the axial direction of the sleeve, and the end part of the sealing lip is in close contact with the outer wall of the first pipe body or the second pipe body.

5. A flexible pipe reinforcement joint structure according to claim 3, wherein, The rubber plate is made of ethylene propylene rubber, the minimum distance between the sealing glue at the two ends of the rubber plate is greater than 50 mm, and the first fixing layer and the second fixing layer are both made of glass fiber reinforced plastic paste.

6. A method of reinforcing a joint of a pipe, characterized by, The utility model comprises the following steps: entering an installed pipeline, the pipeline comprising a first pipe body, a second pipe body and a sleeve, the first pipe body and the second pipe body being inserted into the sleeve from two ends, and a gap in the sleeve being a pipe joint; filling a flexible filling body into the pipe joint, covering the pipe joint and the flexible filling body in the pipe joint with a rubber plate, and adhering the two ends of the rubber plate to the inner walls of the first pipe body and the second pipe body by means of sealing glue; applying glass fiber reinforced plastic paste on the two ends of the rubber plate; the glass fiber reinforced plastic at one end of the rubber plate extends to the inner wall of the first pipe body, and forms a first fixing layer after solidification; the glass fiber reinforced plastic at the other end of the rubber plate extends to the inner wall of the second pipe body, and forms a second fixing layer after solidification; and After the glass fiber reinforced plastic at both ends of the rubber plate is cured, a separation layer is covered on the rubber plate, and both ends of the separation layer are lapped on the first fixing layer and the second fixing layer respectively. A protection plate is covered on the separation layer, and one end of the protection plate extends to the inner wall of the second pipe body and is fixed with the second pipe body.

7. A method of reinforcing a pipe joint according to claim 6, wherein Further comprising the following steps: The gaps at both ends of the sleeve are caulked with caulking glue, and the caulking glue is flexible single-component polyurethane sealant or double-component polysulfide sealant; the caulking glue in the gaps between the sleeve and the first pipe body forms a first flexible sealing body after curing, and the caulking glue in the gaps between the sleeve and the second pipe body forms a second flexible sealing body after curing; The first flexible sealing body is covered with a first geotextile, and both ends of the first geotextile extend to the outer wall of the first pipe body and the outer wall of the sleeve respectively; the first geotextile is wrapped with a packing belt at the corresponding position of the first pipe body and the corresponding position of the sleeve respectively; The second flexible sealing body is covered with a second geotextile, and both ends of the second geotextile extend to the outer wall of the second pipe body and the outer wall of the sleeve respectively; the second geotextile is wrapped with a packing belt at the corresponding position of the second pipe body and the corresponding position of the sleeve respectively.

8. A method of reinforcing a pipe joint according to claim 6, wherein The rubber plate is ethylene propylene diene rubber, the width of the rubber plate is 150mm, the thickness is 2mm, the sealant is double-component polysulfide sealant, the separation layer is polyester film, the width of the first fixing layer covered on the rubber plate and the first pipe body is 30-40mm, and the width of the second fixing layer covered on the rubber plate and the second pipe body is 30-40mm.

Images