A flexible reinforced joint structure for pipelines

Abstract

A flexible reinforced joint structure for a pipeline includes a first pipe body, a second pipe body, an inner sealing layer, a flexible sealant, and an outer sealing layer. The first and second pipe bodies are arranged opposite each other to form a pipeline. The gap between the first and second pipe bodies is a pipe joint, and the flexible sealant is disposed within the pipe joint. The inner sealing layer is disposed on the inner wall of the pipeline, covering the pipe joint and the flexible sealant from the inside of the pipeline. The outer sealing layer is disposed on the outer wall of the pipeline, covering the pipe joint and the flexible sealant from the outside of the pipeline. The inner and outer sealing layers can seal the inner and outer sides of the pipe joint. The flexible sealant can be a flexible two-component polysulfide sealant. When the pipeline deforms, the angle or position of the first and second pipe bodies changes, and the flexible sealant can deform with the change of the pipe joint, ensuring that the pipe joint remains sealed and has a certain strength. This allows the pipeline to adapt to environmental changes.

Description

Technical Field

[0001] This utility model relates to the field of water supply and drainage, and in particular to a flexible reinforced joint structure for pipelines. Background Technology

[0002] Continuously wound glass fiber reinforced plastic (CWFP) pipes have been widely used in urban water supply and drainage, seawater intake and drainage, sewage transportation, and long-distance water diversion projects. Some construction projects have requested redundant and flexible reinforcement of existing CWFP pipe sleeve joints without affecting their sealing performance. Therefore, a reinforced sleeve joint solution that meets the requirements of these projects is needed. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a flexible reinforced joint structure for pipelines that can adapt to environmental changes.

[0004] To achieve the above objectives, the technical solution of this utility model is: a flexible reinforced joint structure for a pipe, comprising a first pipe body, a second pipe body, an inner sealing layer, a flexible sealant, and an outer sealing layer; The first pipe body and the second pipe body are arranged opposite each other to form a pipeline; the gap between the first pipe body and the second pipe body is the pipe body joint, and the flexible sealant is placed in the pipe body joint. The inner sealing layer is located on the inner wall of the pipe, covering the pipe joints and flexible sealant from the inside of the pipe. The outer sealing layer is located on the outer wall of the pipe, covering the pipe joints and flexible sealant from the outside of the pipe.

[0005] The inner and outer sealing layers seal the inside and outside of the pipe joints. The flexible sealant can be a flexible two-component polysulfide sealant. When the pipeline deforms, the angle or position of the first and second pipes changes, causing a change in the width of the pipe joint. The flexible sealant can deform along with the changes in the pipe joint, ensuring that the joint remains sealed and has sufficient strength. This allows the pipeline to adapt to environmental changes.

[0006] Preferably, the inner sealing layer includes a rubber sheet, an isolation layer, and a protective layer; A rubber sheet covers the joints of the pipe body and the flexible sealant. The two ends of the rubber sheet are fixed to the inner walls of the first and second pipe bodies, respectively. The protective layer is located on the inside of the rubber sheet, covering the rubber sheet. One end of the protective layer is fixed to the first or second tube body, while the other end of the protective layer is not fixed. The isolation layer is movable and positioned between the rubber sheet and the protective layer.

[0007] The rubber sheet can be made of EPDM rubber, 150mm wide and 2mm thick. It is adhered to the inner wall of the pipe with adhesive or sealant, and the edges are grouted. The rubber sheet can cover the pipe joints, preventing fluid from the inside of the pipe from entering the joints. Moreover, when the pipe deforms, the rubber sheet can deform accordingly.

[0008] With one end of the protective layer fixed and the other end free, the fluid flows from the fixed end to the free end of the protective layer during pipeline use. The pressure of the fluid inside the pipeline acts on the protective layer, pressing it against the rubber sheet, thus improving the sealing effect of the rubber sheet. Furthermore, when the pipeline deforms or shifts, the fixed end of the protective layer does not resist the deformation of the pipeline or the rubber sheet, preventing the creation or widening of gaps.

[0009] The separator layer can be made of polyester film and can be slidably disposed between the rubber sheet and the protective layer to isolate the rubber sheet and the protective layer. The protective layer and the rubber sheet will not rub against each other and will not get stuck when deformed.

[0010] Preferably, the outer sealing layer includes a sleeve, a first geotextile, a first flexible sealing body, a second geotextile, a second flexible sealing body, and a packing strap; The two ends of the sleeve respectively enclose the first tube and the second tube; The first flexible sealing body is located at the outer end of the gap between the sleeve and the first pipe body. The first geotextile is wrapped around one end of the sleeve and the first pipe body at the same time, and the first geotextile covers the first flexible sealing body. Packing straps are wrapped around the first geotextile at corresponding positions on the first pipe body and the sleeve. The second flexible sealing body is located at the outer end of the gap between the sleeve and the second pipe body. The second geotextile is wrapped around the other end of the sleeve and the second pipe body, and the second geotextile covers the second flexible sealing body. Packing straps are wrapped around the second geotextile at corresponding positions on the second pipe body and the sleeve.

[0011] The first and second flexible sealing bodies can be formed by grouting the ends of the sleeve with single-component polyurethane sealant or two-component polysulfide sealant. The first and second geotextiles are used to protect the first and second flexible sealing bodies from the influence of external substances on the pipeline during deformation or displacement, ensuring the sealing performance at both ends of the sleeve. Packing straps are used to fix the first and second geotextiles to the first and second pipe bodies, respectively.

[0012] Preferably, the inner sealing layer further includes a first fixing layer and a second fixing layer; The two ends of the rubber sheet are respectively adhered and fixed to the first and second pipe bodies. A first fixing layer is attached to one end of the rubber sheet and the first pipe body, and a second fixing layer is attached to the other end of the rubber sheet and the second pipe body. The first and second fixing layers can be made of fiberglass and applied to the ends of the rubber sheet to fix both ends to the first and second pipe bodies, respectively. The adhesive can be resin, a one-component polyurethane sealant, or a two-component polysulfide sealant, used to seal the gaps between the ends of the rubber sheet and the first and second pipe bodies.

[0013] Preferably, the sleeve includes a sleeve body and a sealing rubber layer. The sealing rubber layer is disposed on the inner wall of the sleeve body, and an inwardly protruding ring is provided in the middle of the sealing rubber layer, which extends into the pipe joint. The sealing rubber layer is a sealing rubber with multiple sealing lips on the inner wall. The first pipe and the second pipe are respectively inserted into the sleeve from both ends. The sealing rubber layer seals the gap between the sleeve and the first and second pipes. The ring is used to separate the first and second pipes, so that a certain gap is maintained between the first and second pipes for filling with a flexible sealant, leaving room for deformation when the pipe deforms.

[0014] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This utility model enables the pipe joint to be sealed under both internal and external pressure conditions through the inner and outer sealing layers, and the pipe bodies are filled and sealed using a flexible sealant. The pipe joint can be sealed under both internal and external pressure conditions and under deformation.

[0015] Under internal pressure conditions, the inner sealing layer uses a rubber plate for flexible sealing and a protective plate for protection. The sleeve of the outer sealing layer uses a lip seal with the first and second pipe bodies to achieve hydraulic sealing. This creates a multi-redundant system of "hydraulic sealing + flexible internal reinforcement" at the pipe joint. Even if some sealing measures fail, the remaining sealing structure can still maintain internal pressure sealing, with complementary functions and no direct dependence on each other under external pressure conditions.

[0016] Under external pressure conditions, the sealing lip inside the sleeve, the grout seal at both ends of the sleeve, and the geotextile constitute a layered protection of "compression seal + sealant + environmental isolation". Each layer plays an independent role. When the seal on the outside of the sleeve fails, external reinforcement measures can provide a supplementary protective barrier to ensure the sealing performance and structural stability of the pipeline under complex operating conditions.

[0017] The reinforced joint structure of this utility model is not only applicable to water supply and drainage pipeline projects, but also has important reference and application value for seawater intake and drainage projects, pipeline projects for transporting corrosive media, and engineering fields with high requirements for pipeline sealing and structural stability. It can effectively improve the reliability and safety of pipeline systems.

[0018] This invention can further enhance the resistance to external and internal pressure leakage of the existing sleeve joint without affecting its sealing ability, thus achieving double-insurance flexible reinforcement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention.

[0020] Explanation of key figure labels: First pipe body 1; Second pipe body 2; Inner sealing layer 3; Rubber sheet 31; Isolation layer 32; Protective layer 33; First fixing layer 34; Second fixing layer 35; Flexible sealant 4; Outer sealing layer 5; First flexible sealant 51; Second flexible sealant 52; Sleeve 53; Sealing rubber layer 531; Ring 532; First geotextile 54; Second geotextile 55; Packing strap 56; Pipe joint 6. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1-2 As shown, the present invention discloses a flexible reinforced joint structure for a pipe, comprising a first pipe body 1, a second pipe body 2, an inner sealing layer 3, a flexible sealant 4, and an outer sealing layer 5.

[0023] One end of the first pipe body 1 and one end of the second pipe body 2 are positioned opposite each other, forming a pipeline. A gap exists between the first pipe body 1 and the second pipe body 2; this gap is called the pipe joint 6, and a flexible sealant 4 is filled within the pipe joint 6. The flexible sealant 4 is a flexible two-component polysulfide sealant.

[0024] The inner sealing layer 3 is located on the inner wall of the pipe, covering the pipe joint 6 and the flexible sealant 4 from the inside of the pipe. For example... Figure 2 As shown, the inner sealing layer includes a rubber sheet 31, an isolation layer 32, a protective layer 33, a first fixing layer 34, and a second fixing layer 35.

[0025] A rubber sheet 31 covers the pipe joint 6 and the flexible sealant 4 from the inside of the pipe. The two ends of the rubber sheet are adhered to the inner walls of the first pipe body 1 and the second pipe body 2 respectively using adhesive or a two-component polysulfide sealant. The rubber sheet can be made of ethylene propylene diene monomer (EPDM) rubber, 150mm wide and 2mm thick. After the rubber sheet 31 is attached to the first and second pipe bodies, the two ends of the rubber sheet 31 are sealed with a two-component polysulfide sealant. The EPDM rubber sheet has an elongation at break of over 300%, effectively absorbing joint deformation, and its bonding strength with the pipe is greater than the strength of the rubber sheet base material.

[0026] The first fixing layer 34 is attached to one end of the rubber sheet 31 and the first tube 1. The first fixing layer 34 covers the gap between the end of the rubber sheet 31 and the first tube 1. The first fixing layer 34 is made of fiberglass and is used to further fix the rubber sheet 31.

[0027] The second fixing layer 35 is attached to the other end of the rubber sheet 31 and the second tube 2. The second fixing layer 35 covers the gap between the end of the rubber sheet 31 and the second tube 2. The second fixing layer 35 is made of fiberglass and is used to further fix the rubber sheet 31.

[0028] The protective layer 33 is located inside the rubber plate 31, covering the rubber plate 31. One end of the protective layer is fixed to the second pipe body 2, while the other end is not fixed and remains free. The fixed end of the protective layer is flexibly fixed. When the pipe deforms under external force, the rubber plate also deforms flexibly at the same time. Under the pressure of the water flow inside the pipe, the protective layer 33 will always press against the rubber plate 31 to seal it.

[0029] The isolation layer 32 is movably disposed between the rubber plate 31 and the protective layer 33. The isolation layer 32 can be a polyester film. The isolation layer 32 can move along the direction of the first tube 1 or the second tube 2. The isolation layer 32 is used to isolate the rubber plate 31 and the protective layer 33, and the protective layer 33 will not be rubbed or stuck by the rubber plate 31 when it moves relative to the rubber plate 31.

[0030] The outer sealing layer 5 is located on the outer wall of the pipe, covering the pipe joint 6 and the flexible sealant 4 from the outside of the pipe. The outer sealing layer 5 includes a sleeve 53, a first geotextile 54, a first flexible sealant 51, a second geotextile 55, a second flexible sealant 52, and a packing strap 56.

[0031] The sleeve 53 has its two ends respectively fitted over the first pipe body 1 and the second pipe body 2. The sleeve 53 includes a sleeve body and a sealing rubber layer 531, which is located on the inner wall of the sleeve body. Multiple inwardly protruding sealing lips are provided on the inner sides of both ends of the rubber sealing layer 531. When the first pipe body 1 and the second pipe body 2 are inserted into the sleeve, the sealing lips abut against the outer wall of either the first or second pipe body. An inwardly protruding ring 532 is provided in the middle of the sealing rubber layer 531, extending into the pipe joint 6. The inner diameter of the ring 532 is smaller than the outer diameter of the first and second pipe bodies, allowing the first pipe body 1 and the second pipe body 2 to form a pipe joint 6 with a thickness not less than the outer diameter, providing space for deformation during pipe use.

[0032] The first flexible sealing body 51 is located at the outer end of the gap between the sleeve and the first pipe body 1. The first geotextile 54 is wrapped around one end of the sleeve 53 and the first pipe body 1, covering the first flexible sealing body 51. Packing straps 56 are wrapped around the first geotextile 54 at corresponding positions on the first pipe body 1 and the sleeve 53. The first flexible sealing body 51 seals one end of the sleeve, and the first geotextile 54 covers the first flexible sealing body 51 to prevent it from being damaged by external substances and to strengthen the connection between the sleeve and the first pipe body. The packing straps are used to fix the first geotextile 54 to the first pipe body and the sleeve.

[0033] The second flexible sealing body 52 is located at the outer end of the gap between the sleeve 53 and the second pipe 2. The second geotextile 55 is wrapped around the other end of the sleeve 53 and the second pipe 2, covering the second flexible sealing body 52. ​​Packing straps 56 are wrapped around the second geotextile 55 at corresponding positions on the second pipe 2 and the sleeve 53. The second flexible sealing body 52 seals the other end of the sleeve, and the second geotextile 55 covers the second flexible sealing body 52 to prevent it from being damaged by external substances and to strengthen the connection between the sleeve and the second pipe. The packing straps are used to fix the second geotextile 55 to the second pipe and the sleeve.

[0034] Under internal pressure conditions, the inner sealing layer uses a rubber plate for flexible sealing and a protective plate for protection. The sleeve of the outer sealing layer uses a lip seal with the first and second pipe bodies to achieve hydraulic sealing. This creates a multi-redundant system of "hydraulic sealing + flexible internal reinforcement" at the pipe joint. Even if some sealing measures fail, the remaining sealing structure can still maintain internal pressure sealing, with complementary functions and no direct dependence on each other under external pressure conditions.

[0035] Under external pressure conditions, the sealing lip inside the sleeve, the grout seal at both ends of the sleeve, and the geotextile constitute a layered protection of "compression seal + sealant + environmental isolation". Each layer plays an independent role. When the seal on the outside of the sleeve fails, external reinforcement measures can provide a supplementary protective barrier to ensure the sealing performance and structural stability of the pipeline under complex operating conditions.

[0036] The reinforced joint structure of the present invention is not only applicable to water supply and drainage pipeline projects, but also has important reference and application value for seawater intake and drainage projects, pipeline projects for transporting corrosive media, and engineering fields with high requirements for pipeline sealing and structural stability, and can effectively improve the reliability and safety of pipeline systems.

[0037] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of implementation of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A flexible reinforcing joint structure for pipelines, characterized in that, It includes a first pipe body, a second pipe body, an inner sealing layer, a flexible sealant, and an outer sealing layer; The first pipe body and the second pipe body are arranged opposite each other to form a pipeline; the gap between the first pipe body and the second pipe body is the pipe body joint, and the flexible sealant is placed in the pipe body joint. The inner sealing layer is located on the inner wall of the pipe, covering the pipe joints and flexible sealant from the inside of the pipe. The outer sealing layer is located on the outer wall of the pipe, covering the pipe joints and flexible sealant from the outside of the pipe.

2. The flexible reinforcing joint structure for a pipeline according to claim 1, characterized in that, The inner sealing layer includes a rubber sheet, an isolation layer, and a protective layer; A rubber sheet covers the joints of the pipe body and the flexible sealant. The two ends of the rubber sheet are fixed to the inner walls of the first and second pipe bodies, respectively. The protective layer is located on the inside of the rubber sheet, covering the rubber sheet. One end of the protective layer is fixed to the first or second tube body, while the other end of the protective layer is not fixed. The isolation layer is movable and positioned between the rubber sheet and the protective layer.

3. The flexible reinforcing joint structure for a pipeline according to claim 1, characterized in that, The outer sealing layer includes a sleeve, a first geotextile, a first flexible sealing body, a second geotextile, a second flexible sealing body, and packing straps; The two ends of the sleeve respectively enclose the first tube and the second tube; The first flexible sealing body is located at the outer end of the gap between the sleeve and the first pipe body. The first geotextile is wrapped around one end of the sleeve and the first pipe body at the same time, and the first geotextile covers the first flexible sealing body. Packing straps are wrapped around the first geotextile at corresponding positions on the first pipe body and the sleeve. The second flexible sealing body is located at the outer end of the gap between the sleeve and the second pipe body. The second geotextile is wrapped around the other end of the sleeve and the second pipe body, and the second geotextile covers the second flexible sealing body. Packing straps are wrapped around the second geotextile at corresponding positions on the second pipe body and the sleeve.

4. The flexible reinforcing joint structure for a pipeline according to claim 2, characterized in that, The inner sealing layer also includes a first fixing layer and a second fixing layer; The two ends of the rubber sheet are respectively attached and fixed to the first tube and the second tube. The first fixing layer is attached to one end of the rubber sheet and the first tube, and the second fixing layer is attached to the other end of the rubber sheet and the second tube.

5. The flexible reinforcing joint structure for a pipeline according to claim 3, characterized in that, The sleeve includes a sleeve body and a sealing rubber layer. The sealing rubber layer is located on the inner wall of the sleeve body, and an inwardly protruding ring is provided in the middle of the sealing rubber layer, which extends into the joint of the pipe body.

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