A port sealing connection device for a composite material liner tube

Abstract

This invention provides a port sealing connection device for a composite material liner pipe, belonging to the field of pipeline sealing technology. It includes an outer flange fixed to one end of an external pipeline and an inner liner pipe fixed to the inner wall of the external pipeline. The inner liner pipe is fitted against the inner wall of the outer flange, and an inner flange is inserted into one end of the inner liner pipe. Fastening bolts are fixed between the outer flange and the inner flange, and a sealing ring is fixed to one end of the inner flange. By setting a sealing component, this invention can more tightly fix the port of the inner liner pipe between the outer flange and the inner flange, thereby achieving a seal at the port of the inner liner pipe. It also provides some auxiliary fixing for the inner liner pipe, enhancing the connection strength between the inner liner pipe and the external pipeline, preventing displacement or loosening of the inner liner pipe under the impact of the transported fluid, thus ensuring a tight fit between the inner liner pipe and the inner wall of the external pipeline, further improving the stability of the pipeline connection.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sealing, and in particular to a port sealing connection device for a composite material liner pipe. Background Technology

[0002] Steel-plastic composite pipe is a new type of pipe material with an inner lining tube covering the inside of a metal pipe. It is widely used for connecting pipelines. The inner lining tube is bonded to the inner wall of the metal pipe after being inflated with air. Currently, two steel-plastic composite pipes are often fixed by flanges. When the metal pipe outside the steel-plastic composite pipe is fixed by a flange, the inner lining tube inside the steel-plastic composite pipe automatically aligns. Therefore, the butt joint of the inner lining tube of the steel-plastic composite pipe is mainly connected by bonding the inner lining tube to the plastic layer of the inner wall of the metal pipe. Under long-term use, the joint is subjected to the scouring of the transported fluid. The lack of metal support at the bonded port can easily lead to displacement or loosening of the inner lining tube at the joint of the composite pipe, thereby affecting the connection stability of the steel-plastic composite pipe.

[0003] Therefore, this utility model provides a port sealing connection device for composite material liner tubes to meet the requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a port sealing connection device for a composite material liner pipe, so as to solve the problem that the existing steel-plastic composite pipe joint end bonding connection method with plastic layer makes the liner pipe at the joint end of the composite pipe prone to displacement or loosening, thereby affecting the connection stability of the steel-plastic composite pipe.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A port sealing connection device for a composite material inner liner includes an outer flange fixed to one end of an outer pipe and an inner liner fixed to the inner wall of the outer pipe. The end side wall of the inner liner is fitted with the inner wall of the outer flange. An inner flange is inserted into one end of the inner liner. Fastening bolts are fixed between the outer flange and the inner flange. A sealing ring is fixed to one end wall of the inner flange.

[0007] A sealing assembly is used to seal the port of the inner liner pipe with the inner wall of the outer pipe. The sealing assembly is connected to the inner flange and the inner liner pipe respectively.

[0008] Optionally, the sealing assembly includes a sealing layer that fits between the outer wall of the inner flange and the inner wall of the inner liner. The sealing layer has multiple through holes circumferentially opened on its surface. The sealing layer has a cavity inside. Multiple connecting parts are circumferentially provided between the inner wall and the outer wall of the cavity. The multiple connecting parts correspond to the multiple through holes respectively.

[0009] Optionally, the connecting portion extends outward from the inner wall of the sealing layer to the outer wall of the sealing layer.

[0010] Optionally, the inner wall of the outer flange is provided with a plurality of first grooves in the circumferential direction, the inner wall of the inner liner is provided with a second groove in the circumferential direction corresponding to and adapted to the plurality of first grooves, and the outer wall of the inner flange is provided with a protrusion in the circumferential direction corresponding to and adapted to the plurality of second grooves. The second groove is located between the first groove and the protrusion, and the first groove, the second groove and the protrusion abut against each other in sequence.

[0011] Optionally, the protrusion passes through the through hole and abuts against the second groove.

[0012] Optionally, the sealing layer has multiple support rings inside, and the connecting portion is located between two adjacent support rings.

[0013] Optionally, the support ring includes a fitting portion and an arc-shaped portion, the two fitting portions respectively fitting to the two inner walls of the sealing layer cavity, and the arc-shaped portion connected to the fitting portion.

[0014] Optionally, there are two of each of the fitting portion and the arc-shaped portion, and the two fitting portions and the arc-shaped portion are connected end to end to form a hollow chamber, and the two arc-shaped portions are arranged in parallel and opposite directions.

[0015] Optionally, a sealing flange is fixed to one end of the sealing layer, and the sealing flange is fitted to the side of the end of the inner flange that is close to the outer flange.

[0016] Optionally, the sealing layer, the sealing flange, and the connecting portion are integrally formed.

[0017] Compared with the prior art, this utility model has at least the following beneficial effects:

[0018] In the above scheme, by setting a sealing component, the port of the inner liner can be more tightly fixed between the outer flange and the inner flange, thereby achieving a seal at the port of the inner liner. At the same time, it can also play a certain auxiliary fixing role for the inner liner, enhance the connection strength between the inner liner and the external pipeline, prevent the inner liner from shifting or loosening under the impact of the conveyed fluid, thus ensuring a tight fit between the inner liner and the inner wall of the external pipeline, and further improving the stability of the pipeline connection.

[0019] By setting up a sealing layer and a connecting part, a multi-layer sealing structure can be formed, which is beneficial to improving the reliability and safety of the sealing of the inner liner pipe port. At the same time, the connecting part can also play a supporting and resetting role when the sealing layer is deformed during installation, further improving the sealing effect of the sealing layer.

[0020] By setting the first groove, the second groove, and the protrusion, the inner and outer flanges can be initially fixed, effectively limiting the axial movement of the inner flange. With the fastening bolts, the connection between the inner and outer flanges and their internal sealing layers can be ensured. It can also play a circumferential fixing role for the port of the inner liner, which helps to ensure the tightness of the fit between the port of the inner liner and the inner wall of the external pipe.

[0021] By setting the cooperation between the protrusion and the through hole, a clear positioning reference is provided for the sealing layer, which helps to improve the installation efficiency of the sealing layer, avoids the installation offset or misalignment of the sealing layer, and ensures a tight fit between the sealing layer and the inner flange and inner liner, thereby improving the sealing effect.

[0022] By setting multiple support rings, a solid support framework is provided for the sealing layer, and multiple independent sealing barriers are formed within the sealing layer. The connection between the joint and the through hole provides a certain support effect for the sealing layer, while the two adjacent support rings provide further support and reinforcement to the joint from both sides. The synergistic effect of the support rings and the joint creates multiple support and sealing guarantees within the sealing layer, ensuring that the sealing layer can always fit tightly with the inner flange and inner liner, maintaining good sealing performance. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0024] Figure 1 A three-dimensional structural diagram of the port sealing connection device for a composite material liner tube;

[0025] Figure 2 This is a three-dimensional exploded side section diagram of the outer flange, inner flange, and sealing layer assembly.

[0026] Figure 3 A side-section three-dimensional structural diagram of the outer flange and inner liner tube assembly;

[0027] Figure 4 A side-section three-dimensional structural diagram of the sealing layer and the sealing flange in conjunction;

[0028] Figure 5 A three-dimensional structural diagram of the inner flange and sealing layer mating;

[0029] Figure 6 A side-section three-dimensional structural diagram of the outer flange, inner flange and inner liner tube assembly;

[0030] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle;

[0031] Figure 8 A schematic diagram of the three-dimensional structure for the fitting part and the arc-shaped part in the support ring.

[0032] Figure label:

[0033] 1. Outer flange; 2. Inner flange; 3. Fastening bolts; 4. Inner liner; 5. Sealing ring; 6. First groove; 7. Second groove; 8. Protrusion; 9. Sealing layer; 10. Sealing flange; 11. Through hole; 12. Support ring; 13. Connecting part; 14. Fitting part; 15. Curved part.

[0034] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0035] The following is a detailed description of the port sealing connection device for a composite material liner tube provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0036] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0037] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0038] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0039] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0040] like Figures 1 to 8 As shown, this utility model provides a port sealing connection device for a composite material liner pipe, including an outer flange 1 fixed to one end of an outer pipe and an inner liner pipe 4 fixed to the inner wall of the outer pipe. The inner liner pipe 4 is fitted to the inner wall of the outer flange 1, and an inner flange 2 is inserted into one end of the inner liner pipe 4. Fastening bolts 3 are fixed between the outer flange 1 and the inner flange 2. A sealing ring 5 is fixed on one end wall of the inner flange 2. The inner liner pipe 4 is fitted to the inner wall of the outer pipe after being inflated and cured. This is prior art and will not be described in detail here. The port of the inner liner pipe 4 is located between the outer flange 1 and the inner flange 2, and the outer flange 1 and the inner flange 2 are fixed by the fastening bolts 3, which helps to ensure a tight fit between the inner liner pipe 4 and the inner wall of the outer pipe. The inner flange 2 and the sealing ring 5 fixed at one end can be used for flange connection with other pipes, thereby realizing multi-pipe connection. The connection of the pipes can be understood as follows: when the two inner flanges 2 are connected, a sealing ring 5 or multiple sealing rings 5 ​​with different diameters can be set between the two inner flanges 2 to achieve the sealing between the pipes. This will not be elaborated on further. The sealing component is used to assist in sealing between the port of the inner liner 4 and the inner wall of the outer pipe. The sealing component is connected to the inner flange 2 and the inner liner 4 respectively, which can fix the port of the inner liner 4 more tightly between the outer flange 1 and the inner flange 2, thereby achieving the sealing of the port of the inner liner 4. At the same time, it can also play a certain auxiliary fixing role for the inner liner 4, enhance the connection strength between the inner liner 4 and the outer pipe, prevent the inner liner 4 from being displaced or loosened under the impact of the conveyed fluid, thereby ensuring the tight fit between the inner liner 4 and the inner wall of the outer pipe, and further improving the stability of the pipe connection.

[0041] like Figure 2 and Figures 4 to 7 As shown, the sealing assembly includes a sealing layer 9 that fits between the outer wall of the inner flange 2 and the inner wall of the inner liner 4. The sealing layer 9 has multiple through holes 11 circumferentially formed on its surface. The sealing layer 9 has a hollow interior, and multiple connecting parts 13 are circumferentially formed between the inner walls of the cavity. Each connecting part 13 corresponds to one of the multiple through holes 11. When the hollow sealing layer 9 is installed between the inner flange 2 and the inner liner 4, it can undergo a certain deformation, thus facilitating the smooth installation of the sealing layer 9, simplifying the installation process, and improving installation efficiency. The multiple connecting parts 13 are located within the cavity of the sealing layer 9, and each of the multiple connecting parts 13 corresponds to one of the multiple through holes. The connection between the hole wall of the through hole 11 and the two ends of the connecting part 13 are respectively connected to the two sides of the hole wall of the through hole 11, thereby ensuring the sealing performance of the cavity of the sealing layer 9. At the same time, the connecting part 13 can also play a supporting and repositioning role when the sealing layer 9 is deformed during installation, further improving the sealing effect of the sealing layer 9. The sealing layer 9 is directly attached to the outer wall of the inner flange 2 and the inner wall of the inner liner 4 to form the first layer of seal. The connection between the connecting part 13 and the hole wall of the through hole 11 forms the second layer of seal within the sealing layer 9. The multi-layer seal can effectively improve the reliability and safety of the sealing of the port of the inner liner 4.

[0042] like Figure 4 and Figure 7 As shown, the connecting part 13 extends outward from the inner wall of the sealing layer 9 to the outer wall of the sealing layer 9, which can provide additional support and reinforcement for the sealing layer 9. When the sealing layer 9 is subjected to external pressure or deformation, the connecting part 13 can disperse the stress, prevent the sealing layer 9 from deforming excessively, and ensure the structural stability of the sealing layer 9.

[0043] like Figure 3 , Figure 6 and Figure 7 As shown, the inner wall of the outer flange 1 has multiple first grooves 6 circumferentially formed, and the inner wall of the inner liner tube 4 has second grooves 7 circumferentially formed corresponding to and adapted to the multiple first grooves 6. The outer wall of the inner flange 2 has protrusions 8 circumferentially formed corresponding to and adapted to the multiple second grooves 7. The second grooves 7 are located between the first grooves 6 and the protrusions 8. The first grooves 6, second grooves 7 and protrusions 8 abut against each other in sequence. When the inner liner tube 4 is inflated and cured, the second grooves 7 are tightly attached to the inner wall of the outer flange 1, thus fitting the first grooves 6. When the inner flange 2 and the outer flange 1 are assembled, The protrusion 8 is inserted into the inner wall of the inner liner 4 along with one end of the inner flange 2, so that the protrusion 8 engages with the second groove 7. The outer wall of the second groove 7 fits against the inner wall of the first groove 6, which can achieve the initial fixation of the inner flange 2 and the outer flange 1. It can effectively limit the movement of the inner flange 2 in the axial direction. With the fixation of the fastening bolts 3, it can ensure the stability of the connection between the inner flange 2 and the outer flange 1 and their internal sealing layer 9. It can also play a circumferential fixing role for the port of the inner liner 4, which is conducive to ensuring the tightness of the fit between the port of the inner liner 4 and the inner wall of the external pipe.

[0044] like Figures 5 to 7 As shown, the protrusion 8 passes through the through hole 11 and abuts against the second groove 7, which can not only fix the port of the inner liner tube 4, but also provide a clear positioning reference for the sealing layer 9 through the snap-fit ​​between the protrusion 8 and the through hole 11. This is beneficial to improving the installation efficiency of the sealing layer 9, avoiding the installation offset or misalignment of the sealing layer 9, and ensuring the tight fit between the sealing layer 9 and the inner flange 2 and the inner liner tube 4, thereby improving the sealing effect.

[0045] like Figure 2 , Figure 4 and Figure 8 As shown, the sealing layer 9 has multiple support rings 12 inside, and a connecting part 13 is located between two adjacent support rings 12. Each support ring 12 includes a fitting part 14 and an arc-shaped part 15. The fitting part 14 fits against the inner wall of the cavity of the sealing layer 9, and the arc-shaped part 15 is connected to the fitting part 14. There are two fitting parts 14 and two arc-shaped parts 15. The two fitting parts 14 and arc-shaped parts 15 are connected end-to-end to form a hollow chamber. The two arc-shaped parts 15 are arranged in parallel opposite directions, and the two fitting parts are also arranged in parallel opposite directions. The multiple support rings 12 provide a solid support frame for the sealing layer 9 and form multiple independent sealing barriers within the sealing layer 9. The connection between the connecting part 13 and the through hole 11 provides a certain support effect to the sealing layer 9, while the two adjacent support rings 12 further support and reinforce the connecting part 13 from the top and bottom. The synergistic effect of the support ring 12 and the connecting part 13 creates multiple supports and seals within the sealing layer 9, ensuring that the sealing layer 9 can always fit tightly against the inner flange 2 and the inner liner 4, maintaining good sealing performance. The hollow chamber structure formed by the two fitting parts 14 and the arc-shaped part 15 connected end to end increases the strength and rigidity of the support ring 12. When subjected to fluid pressure, it will produce a certain elastic deformation, further squeezing the sealing layer 9, making the sealing layer 9 fit more tightly against the inner flange 2 and the inner liner 4, thereby enhancing the sealing effect. The relative arrangement of the two arc-shaped parts 15 provides a stable support base for the support ring 12. When the support ring 12 is deformed by external force, the elasticity of the arc-shaped part 15 can make it quickly return to its original position, ensuring that the support ring 12 can always provide continuous and stable support for the sealing layer 9.

[0046] like Figure 2 , Figure 4 and Figure 5 As shown, a sealing flange 10 is fixed at one end of the sealing layer 9. The sealing flange 10 fits against the side of the inner flange 2 and the outer flange 1 that are close to each other, forming an additional sealing barrier at the end of the sealing layer 9. The sealing flange 10 can effectively prevent fluid from leaking from the end gap between the sealing layer 9 and the inner flange 2, further enhancing the sealing performance of the entire sealing structure.

[0047] like Figure 2 and Figure 4 As shown, the sealing layer 9, the sealing flange 10, and the connecting part 13 are integrally formed and can be manufactured through a one-time molding process, which reduces the number of processes and material waste in the production process, lowers the manufacturing cost, and at the same time reduces the number of connection points and installation steps between components during installation, thereby improving installation efficiency.

[0048] The workflow of the technical solution provided by this utility model is as follows:

[0049] In use, the outer flange 1 is fixed to one end of the external pipe, and the inner liner 4 is extended to be flush with the inner wall end of the neck of the outer flange 1. After inflation and solidification, the surface of the inner liner 4 forms a second groove 7 that fits with the first groove 6 on the surface of the outer flange 1. The sealing layer 9, on which the support ring 12 is fixed, is fitted onto the surface of the inner flange 2, so that the protrusion 8 on the surface of the inner flange 2 passes through the through hole 11. At this time, the sealing flange 10 fits against the side wall of the inner flange 2 away from the sealing ring 5. The neck of the inner flange 2, on which the sealing layer 9 is fitted, is inserted into the inner liner 4. Before insertion, the sealing layer 9 can be tilted towards the inner flange 4. The internal pressing causes the internal support ring 12 and connecting part 13 to deform, allowing the sealing layer 9 to be efficiently inserted into the inner wall of the inner liner 4 inside the outer flange 1. When the protrusion 8 engages with the second groove 7, the initial fixing of the outer flange 1 and the inner flange 2 is completed, as well as the installation and fixing of the sealing layer 9. The support ring 12 and connecting part 13 spring back to their original positions, allowing the sealing layer 9 to fit tightly between the inner flange 2 and the inner liner 4, forming an effective seal. Afterward, the inner flange 2 and the sealing ring 5 fixed at one end can be used for flange connection with other pipelines, thereby realizing the connection of multiple pipelines.

[0050] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the preferred embodiments; however, those skilled in the art can fully understand this utility model without these details. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A port sealing connection device for a composite material liner pipe, comprising an outer flange fixed to one end of an outer pipe and an inner liner pipe fixed to the inner wall of the outer pipe, characterized in that, The end sidewall of the inner liner tube is fitted to the inner wall of the outer flange, and an inner flange is inserted into one end of the inner liner tube. Fastening bolts are fixed between the outer flange and the inner flange, and a sealing ring is fixed to one end wall of the inner flange. A sealing assembly is used to seal the port of the inner liner pipe with the inner wall of the outer pipe. The sealing assembly is connected to the inner flange and the inner liner pipe respectively.

2. The port sealing connection device for the composite material liner tube according to claim 1, characterized in that, The sealing assembly includes a sealing layer that fits between the outer wall of the inner flange and the inner wall of the inner liner. The sealing layer has multiple through holes circumferentially opened on its surface. The sealing layer is hollow inside. Multiple connecting parts are circumferentially provided between the inner wall and the outer wall of the cavity. The multiple connecting parts correspond to the multiple through holes respectively.

3. The port sealing connection device for the composite material liner tube according to claim 2, characterized in that, The connecting portion expands outward from the inner wall of the sealing layer to the outer wall of the sealing layer.

4. The port sealing connection device for the composite material liner tube according to claim 3, characterized in that, The inner wall of the outer flange is provided with a plurality of first grooves in the circumferential direction, the inner wall of the inner liner is provided with a second groove in the circumferential direction corresponding to and adapted to the plurality of first grooves, and the outer wall of the inner flange is provided with a protrusion in the circumferential direction corresponding to and adapted to the plurality of second grooves. The second groove is located between the first groove and the protrusion, and the first groove, the second groove and the protrusion abut against each other in sequence.

5. The port sealing connection device for the composite material liner tube according to claim 4, characterized in that, The protrusion passes through the through hole and abuts against the second groove.

6. The port sealing connection device for the composite material liner tube according to claim 5, characterized in that, The sealing layer has multiple support rings inside, and the connecting part is located between two adjacent support rings.

7. The port sealing connection device for the composite material liner tube according to claim 6, characterized in that, The support ring includes a fitting portion and an arc-shaped portion. The two fitting portions are respectively fitted to the two inner walls of the sealing layer cavity, and the arc-shaped portion is connected to the fitting portion.

8. The port sealing connection device for the composite material liner tube according to claim 7, characterized in that, There are two of each of the fitting part and the arc-shaped part. The two fitting parts and the arc-shaped part are connected end to end to form a hollow chamber. The two arc-shaped parts are arranged in parallel and opposite directions.

9. The port sealing connection device for the composite material liner tube according to claim 8, characterized in that, One end of the sealing layer is fixed with a sealing flange, which is fitted to the side of the inner flange that is close to the outer flange.

10. The port sealing connection device for the composite material liner tube according to claim 9, characterized in that, The sealing layer, the sealing flange, and the connecting part are integrally formed.

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