Device for adding casing pipe to urban gas pipeline without cutting off pipe

Abstract

The utility model provides a device for adding a casing pipe to an urban gas pipeline without breaking the pipeline, and the device comprises a casing pipe assembly which is used for being split and sleeved with the gas pipeline; the centering assembly is used for centering and positioning the sleeve assembly and the gas pipeline, and the centering assembly and the sleeve assembly form a sealed filling cavity; and the filling assembly is used for carrying out adhesive filling on the sealed filling cavity. According to the technical scheme, the safety and the construction efficiency of gas pipeline construction are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas system, running other medium's pipeline, especially to a kind of urban gas pipeline continuous pipe sleeve device. BACKGROUND

[0002] The prior art status is as follows:

[0003] 1. Standard specification:

[0004] According to industry standards, when gas pipelines cross drainage pipes, heat pipe trenches, comprehensive pipe galleries, tunnels and other various purpose trenches, the gas pipelines should be laid in the sleeve, and the two ends of the sleeve need to be sealed with flexible corrosion-resistant materials to prevent groundwater or other media from entering the inside of the sleeve.

[0005] 2. Installation period problem:

[0006] During the early construction stage, some gas pipelines failed to strictly follow the current standards to install sleeves, resulting in some gas pipelines being directly exposed near other pipelines or structures, increasing the risk of leakage and maintenance difficulty.

[0007] 3. Changes in operating environment:

[0008] With the development of cities, the use of underground space becomes more complex, and factors such as soil conditions around the original gas pipelines without sleeves and the layout of adjacent pipelines may change, further affecting the safety and stability of the gas pipelines.

[0009] 4. Traditional repair method:

[0010] Traditional repair schemes usually involve shutting down gas, installing sleeves, welding restoration, and rerouting operations on running gas pipelines. This method requires long-term gas shutdown and fire operation, which not only has high safety risks, but also brings inconvenience to residents' life, and increases engineering cost and time cost.

[0011] The existing problems and shortcomings of the urban gas pipeline sleeve installation technology include:

[0012] 1. Gas leakage safety hazard:

[0013] Once the gas pipeline without sleeve leaks, especially in confined spaces (such as trenches and valve wells), gas is easy to accumulate to form explosive mixtures, increasing the likelihood of accidents and threatening public safety.

[0014] 2. Maintenance difficulty:

[0015] Gas pipelines without casing protection are more susceptible to external factors such as corrosion, mechanical damage, etc., making daily inspection and maintenance more difficult to detect potential problems and take preventive measures in a timely manner.

[0016] 3. High economic cost:

[0017] Using traditional methods to install casings on existing gas pipelines involves complex construction processes, including gas shutdown, excavation, welding, and a series of procedures that generate high direct and indirect costs, as well as economic losses and social negative impacts due to gas supply interruptions.

[0018] 4. Large social impact:

[0019] Gas supply needs to be temporarily suspended during construction, causing significant disruption to daily life for residents; in addition, hot work operations also pose additional safety hazards, especially in densely populated urban areas, where any safety incidents can lead to serious social consequences.

[0020] In summary, although existing casing installation technology for urban gas pipelines has clear standards to guide it, it still faces many challenges in practical application. To address these issues, it is necessary to explore more efficient, safe, and economical new technologies and methods to ensure the safe and stable operation of urban gas pipeline networks. Practical new type content

[0021] The present application provides a device for continuously casing urban gas pipelines to improve the safety and efficiency of gas pipeline construction.

[0022] The present application provides a device for continuously casing urban gas pipelines, comprising:

[0023] A casing assembly for splitting and casing with the gas pipeline;

[0024] A centering assembly for centering and positioning the casing assembly and the gas pipeline, and forming a sealed filling cavity with the casing assembly;

[0025] A filling assembly for filling the sealing filling cavity with adhesive.

[0026] In the above technical solution, by setting the casing assembly for splitting and casing with the gas pipeline, the centering assembly for centering and positioning the casing assembly and the gas pipeline, and the filling assembly for filling the sealing filling cavity with adhesive, the safety and efficiency of gas pipeline construction are improved.

[0027] In one specific implementation, it further includes a casing clamp, wherein,

[0028] The sleeve fixture is used to clamp and fix the sleeve assembly.

[0029] In a specific embodiment, the sleeve assembly comprises two half-round pipes, wherein,

[0030] The two ends of the half-round pipes are connected with the gas pipeline through the centering assembly.

[0031] In a specific embodiment, the centering assembly comprises a centering rubber ring, wherein,

[0032] The centering rubber ring is used to be bonded and fixed with the gas pipeline and the half-round pipe, forming the sealed filling cavity.

[0033] In a specific embodiment, the half-round pipe is provided with an adhesive feeding port and an adhesive discharging port, which are in communication with the sealed filling cavity.

[0034] In a specific embodiment, the adhesive feeding port is arranged on the half-round pipe below the gas pipeline, and the adhesive discharging port is arranged on the half-round pipe above the gas pipeline.

[0035] In a specific embodiment, the half-round pipe is wrapped with a composite material.

[0036] In a specific embodiment, the adhesive filling pressure of the filling assembly is less than 0.01 MPa.

[0037] In a specific embodiment, the sealed filling cavity is filled with adhesive.

[0038] In a specific embodiment, the adhesive is epoxy resin. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The structure diagram of the device for continuously sleeving the urban gas pipeline is provided for the embodiments of the present application;

[0040] Figure 2 The A-A sectional view of Figure 1

[0041] The B enlarged view of Figure 3 Figure 2

[0042] 1-gas pipeline (including other pipelines that need to be sleeved and run other media), 2-bonding resin, 3-epoxy resin filling discharging port, 4-centering rubber ring, 5-epoxy resin, 6-half-round pipe, 7-composite material, 8-epoxy resin feeding port. DETAILED DESCRIPTION​​

[0043] The application will be further described below in detail by means of the accompanying drawings and embodiments. The features and advantages of the application will become more apparent from these descriptions.

[0044] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Although various aspects of an implementation can be described herein with reference to a limited number of embodiments, this is not intended to exhaustively enumerate all conceivable embodiments in which this implementation can be made. Embodiments of the application will now be described, by way of example only, with reference to the accompanying drawings.

[0045] Furthermore, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0046] To facilitate the understanding of the device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application, the application scenarios thereof are first described. The device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application is used to improve the safety and efficiency of gas pipeline construction. The existing problems and shortcomings of the city gas pipeline sleeving technology include: 1. Safety hazard of gas leakage: once the gas pipeline without sleeving leaks, especially in a closed and limited space (such as a pipe trench or a valve well), gas is easy to gather to form an explosive mixture, increasing the possibility of accidents and threatening public safety. 2. Difficult maintenance: the gas pipeline without sleeving protection is more susceptible to external factors such as corrosion and mechanical damage, making it more difficult to conduct daily inspection and maintenance work, and it is difficult to find potential problems and take preventive measures in time. 3. High economic cost: using the traditional method to add a sleeve to the existing gas pipeline involves a complex construction process, including gas shutdown, excavation, welding and a series of procedures, which will generate high direct and indirect costs, and also cause economic losses and social negative impacts due to the interruption of gas supply. 4. Large social impact: the gas supply needs to be temporarily suspended during construction, which greatly interferes with the daily life of residents; in addition, the fire operation also brings additional safety hazards, especially in densely populated urban areas, any safety accident can cause serious social consequences. Therefore, the embodiments of the application provide a device for continuously sleeving a pipe of a city gas pipeline to improve the safety and efficiency of gas pipeline construction. The device will be described in detail below in combination with specific drawings.

[0047] Reference Figures 1 to 3 , Figure 1 The structural schematic diagram of the device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application is shown in the figure. Figure 2 The A-A sectional view of the device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application is shown in the figure. Figure 1 The B enlarged view of the device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application is shown in the figure. Figure 3 The B enlarged view of the device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application is shown in the figure. Figure 2 The B enlarged view of the device for continuously sleeving a pipe of a city gas pipeline provided by the embodiments of the application is shown in the figure.

[0048] In Figures 1 to 3 the embodiment of the present application provides a device for continuously sleeving a city gas pipeline, comprising:

[0049] a sleeve assembly for sleeving the city gas pipeline;

[0050] a centering assembly for centering and positioning the sleeve assembly and the city gas pipeline and forming a sealed filling cavity with the sleeve assembly;

[0051] a filling assembly for filling adhesive into the sealed filling cavity.

[0052] In the above technical solution, the sleeve assembly is arranged to sleeve the city gas pipeline, the centering assembly is arranged to center and position the sleeve assembly and the city gas pipeline 1 and form a sealed filling cavity with the sleeve assembly, and the filling assembly is arranged to fill adhesive into the sealed filling cavity, thereby improving the safety and efficiency of city gas pipeline construction.

[0053] In a specific embodiment, the device further comprises a sleeve clamp, wherein

[0054] the sleeve clamp is arranged to clamp and fix the sleeve assembly. The specific structure of the sleeve clamp is not shown in the figure and is a known technology, which will not be described here.

[0055] In a specific embodiment, the sleeve assembly comprises two semicircular pipes 6, wherein

[0056] the two ends of the semicircular pipes are connected to the city gas pipeline through the centering assembly.

[0057] In a specific embodiment, the centering assembly comprises a centering rubber ring 4, wherein

[0058] the centering rubber ring is arranged to be fixed to the city gas pipeline and the semicircular pipe to form the sealed filling cavity. Specifically, the centering rubber ring is fixed to the city gas pipeline 1 through the adhesive resin 2.

[0059] In a specific embodiment, the semicircular pipe is provided with an adhesive inlet and an adhesive outlet, and the adhesive inlet and the adhesive outlet are in communication with the sealed filling cavity.

[0060] Specifically, the semicircular pipe is provided with an epoxy resin outlet 3 and an epoxy resin inlet 8.

[0061] In a specific embodiment, the adhesive inlet is arranged on the semicircular pipe below the city gas pipeline, and the adhesive outlet is arranged on the semicircular pipe above the city gas pipeline.

[0062] In one specific embodiment, the semi-circular pipe is wrapped with a composite material 7 on the outside.

[0063] In one specific embodiment, the adhesive filling pressure of the filling assembly is less than 0.01 MPa.

[0064] In one specific embodiment, the sealed filling cavity is filled with adhesive.

[0065] In one specific embodiment, the adhesive uses epoxy resin. Specifically, the adhesive uses filling epoxy resin 5.

[0066] Reference Figures 1 to 3 Specifically, the device for continuously sleeving the urban gas pipeline includes:

[0067] Semi-circular pipe: two semi-circular pipes are selected as the sleeve main body, and the inner diameter thereof should be slightly larger than the outer diameter of the gas pipeline to be protected; a certain arc-shaped semi-pipe, a square pipeline semi-pipe, etc. can also be used; in addition, multiple sleeve materials can be used according to the needs of the protection structure. The interface between the semi-pipes can be flat, or can be a stepped, toothed or other meshing structure.

[0068] Sealing structure: in order to ensure good sealing between the sleeve and the gas pipeline, a positioning centering rubber rod is arranged at the end of the two semi-circular pipes, and the annular gap and the joint position of the sleeve and the gas pipeline are coated with adhesive resin; the butt joint of the sleeve can also be wrapped and sealed using sealing tape and other materials.

[0069] Composite material outer layer: a layer or multiple layers of high-performance composite material are wrapped outside the assembled sleeve to enhance the overall strength and durability of the sleeve, and also to play a role in corrosion prevention.

[0070] Filling epoxy resin: the epoxy resin is injected into the gap between the protected pipe and the sleeve by using negative pressure suction or filling.

[0071] When filling the epoxy resin between the sleeve and the gas pipeline, vacuum degassing treatment can be performed, or direct filling or suction can be performed. When vacuum degassing treatment is performed, the negative pressure should be lower than one atmosphere, and is preferably lower than 0.01 MPa. This has multiple effects: first, the sealing performance is significantly enhanced, the fine gaps between the sleeve and the gas pipeline are fully filled, and gas leakage is effectively prevented; second, an additional protective layer is formed to isolate external moisture and chemicals from corroding the pipeline, thereby strengthening the corrosion resistance of the pipeline; third, the structural stability is improved, the sleeve and the gas pipeline are tightly connected, the overall stability is enhanced, and the risk of pipeline displacement or deformation caused by external factors is reduced; fourth, good insulation performance is achieved to prevent current interference and ensure normal operation of the gas pipeline.

[0072] The construction process of the device for continuously sleeving the urban gas pipeline is:

[0073] ① On-site investigation: detailed on-site investigation of the gas pipeline section requiring sleeve installation is performed to determine the specific construction location, surrounding environmental conditions, and possible technical difficulties;

[0074] ② On-site work: excavation, measurement of the gas pipeline diameter and sleeve installation length and position, and cleaning of the gas pipeline to ensure accurate subsequent operation;

[0075] ③ Preparation work: necessary tools and materials are prepared, including half-round pipes, adhesive resin, epoxy resin pouring, and composite materials;

[0076] ④ Half-round pipe installation: the end of the upper and lower half-round pipes of the sleeve is installed, centered, and glued with a rod, the diameter of the rod is determined according to the gap between the sleeve and the gas pipe, a margin is reserved, and the end of the half-round pipe is aligned; adhesive resin is applied to the end face of the half-round pipe;

[0077] ⑤ Adhesive resin application: the sleeve is fixed on the gas pipeline using a sleeve clamp, adhesive resin is applied to the joint position of the half-round pipe; at the end of the sleeve, the annular gap between the sleeve and the gas pipeline is coated with adhesive resin; after the resin solidifies, the next step is performed;

[0078] ⑥ Composite material reinforcement: the clamp is removed, the composite material is cut to the appropriate size, and is uniformly wound around the surface of the pipeline; after winding is completed, ultraviolet light is used for curing;

[0079] ⑦ Epoxy resin pouring: the main agent and curing agent of the pouring epoxy resin are weighed according to the proportion and thoroughly mixed; the pouring epoxy resin is vacuum degassed to ensure the compactness of the pouring epoxy resin. The negative pressure of the epoxy resin degassing is less than 0.01 MPa; the pouring epoxy resin is injected into the sleeve by negative pressure suction.

[0080] ⑧ Quality inspection: after construction is completed, the newly installed sleeve is comprehensively quality inspected according to relevant standards to ensure that all indicators meet the requirements;

[0081] ⑨ Backfilling and restoration: the construction site is cleaned, all construction equipment and waste are removed, the original topography is restored, and the normal use of the surrounding environment and public facilities is ensured.

[0082] In the above technical solution, the positive effects of the present application include:

[0083] 1. Safety is significantly improved

[0084] Non-welding operation: cold connection technology is adopted, avoiding the need for welding operation in the traditional process, eliminating the risk of fire or explosion caused by open flame.

[0085] No gas stop construction: The sleeve installation can be completed without cutting off the gas supply, ensuring continuous gas supply during construction and reducing the impact on residents' lives.

[0086] Leakage prevention design: Through special sealing structure, even if the gas pipeline leaks, it can effectively prevent gas from gathering in the closed space, thereby reducing the potential safety hazards.

[0087] 2. Convenient and efficient construction

[0088] Quick installation: The use of two half-round pipes to form a complete sleeve, combined with a composite outer layer, makes the entire installation process simple and fast, greatly shortening the construction time.

[0089] No line change: No need to adjust the original gas pipeline direction or position, simplifying the construction process and reducing interference with surrounding infrastructure.

[0090] Strong adaptability: Suitable for different diameters and materials of gas pipelines, as well as various complex underground environments, with wide applicability.

[0091] 3. Economic cost reduction

[0092] Reduced direct costs: Compared with traditional high-cost operations such as disconnecting gas pipelines, installing sleeves, and welding to restore, the invention greatly reduces material and labor costs.

[0093] Indirect benefits are obvious: Avoiding economic losses and social impacts caused by gas stop, while reducing additional costs such as traffic control and environmental restoration.

[0094] Low long-term maintenance cost: High-quality sealing performance and durable composite outer layer extend the service life of the sleeve, reducing the frequency of subsequent maintenance and replacement.

[0095] 4. Environmentally friendly

[0096] Reducing air pollution: Avoiding harmful gas emissions that may occur during hot work, helping to improve air quality.

[0097] 5. Improve public service quality

[0098] Stable gas supply guarantee: Maintaining normal operation of the gas pipeline during the entire sleeve installation process improves the reliability and stability of gas supply services and enhances user satisfaction.

[0099] Promote urban management: Provide strong support for the safe and stable operation of urban gas pipeline networks, promoting the modernization process of urban infrastructure construction and management.

[0100] In summary, the application not only solves many problems existing in the prior art pipe sleeve installation technology for urban gas pipelines, but also brings significant improvements in safety, construction efficiency, economic cost, environmental protection, and public service quality, and many other positive effects. This sleeve installation method, which is continuous, has good sealing performance, does not require fire, does not require line modification, does not require gas stoppage, and has low economic cost, represents an important innovation in the maintenance technology for urban gas pipelines, and has a wide application prospect and promotion value.

[0101] Although the embodiments of the application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the application, and those of ordinary skill in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application. On this basis, various replacements and improvements can be made to the application, and these all fall within the protection scope of the application.

Claims

1. A device for adding a sleeve to an urban gas pipeline without interrupting its flow, characterized in that, include: Sleeve assembly, used for disassembly and assembly with gas pipelines; The centering component is used to center and position the sleeve assembly and the gas pipeline, and forms a sealed filling cavity with the sleeve assembly. A filling assembly for filling the sealed filling cavity with adhesive.

2. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 1, characterized in that, Also includes: Sleeve clamps, among which, The sleeve clamp is used to clamp and fix the sleeve assembly.

3. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 2, characterized in that, The sleeve assembly includes two semi-circular tubes, wherein, The two ends of the semicircular tube are connected to the gas pipeline through the centering assembly.

4. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 3, characterized in that, The centering component includes a centering rubber ring, wherein... The centering rubber ring is used to bond and fix it to the gas pipeline and the semi-circular pipe to form the sealed filling cavity.

5. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 4, characterized in that, The semi-circular tube is provided with an adhesive inlet and an adhesive outlet, which are connected to the sealed filling cavity.

6. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 5, characterized in that, The adhesive inlet is located on the semi-circular pipe below the gas pipeline, and the adhesive outlet is located on the semi-circular pipe above the gas pipeline.

7. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 6, characterized in that, The outer side of the semi-circular tube is wrapped with composite material.

8. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 7, characterized in that, The adhesive injection pressure of the filling assembly is less than 0.01 MPa.

9. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 8, characterized in that, The sealed filling cavity is filled with adhesive.

10. The device for adding sleeves to urban gas pipelines without interrupting the pipe flow as described in claim 9, characterized in that, The adhesive used is epoxy resin.

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