Emergency repairing and leaking stoppage construction method for low-pressure industrial pipeline

Abstract

According to the technical scheme, the invention discloses a construction method for emergency repairing and leaking stoppage of a low-pressure industrial pipeline. The construction method comprises the following steps that the position, 300 mm wide, of a leakage point of the pipeline is polished cleanly in the circumference direction of the pipeline; the asbestos packing is wound around the leakage point of the pipeline and tightened, and the asbestos packing is tightened through a strap and then taken down; the glass fiber felt is wound outside the asbestos packing and the pipeline, and the middle-layer leaking stoppage material mixed liquid is brushed; the glass wool cloth is wound outside the glass fiber mat and the pipeline, the middle surface layer leaking stoppage material mixed liquid is brushed, and the middle surface layer leaking stoppage material mixed liquid is brushed after solidification. According to the method, cutting and electric welding are not needed in the repairing process, and the high-danger operation environment of medium maintenance of the combustible gas pipeline or the combustible liquid pipeline is completely avoided. And the repairing process is simple and quick, and quick and effective maintenance can be performed under the condition of normal operation of the pipeline, so that the risks of safety, economy, environment and the like caused by stopping conveying of the pipeline are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline repair, in particular to a construction method for emergency repair and plugging of low-pressure industrial pipelines. Background Art

[0002] With the vigorous development of society, the types of industrial products are becoming more and more diverse, which is inseparable from a whole set of huge process equipment. These equipment are connected by tens of thousands of pipeline systems like highways. The pipeline system is characterized by high efficiency, safety, and stable transportation. However, due to local defects in the pipeline or other factors, local damage to the pipeline often results in large losses, great safety hazards, and great pollution, which threatens the safety of people, materials, and machines around them all the time. Therefore, fast and safe maintenance technology is urgently needed.

[0003] The pipelines that need to be treated urgently are generally flammable, explosive, low-pressure and high-risk pipeline systems. Leakage of such pipelines threatens the safety of surrounding people, materials and machines. Many explosions in chemical plants are almost always caused by leakage of flammable and explosive pipelines or equipment. Therefore, there is an urgent need for a safe, fast, economical and efficient pipeline repair technology. Summary of the invention

[0004] The technical problem solved by the invention is that the existing pipeline repair methods are generally highly dangerous, and the pipeline is prone to leakage, threatening the surrounding environment.

[0005] In order to solve the above technical problems, the technical solution of the present invention provides a low-pressure industrial pipeline emergency repair and plugging construction method, wherein the construction method comprises the following steps:

[0006] Step 1: Polish the 300mm wide area of ​​the pipe leaking point along the circumference of the pipe to reveal a clean metallic luster;

[0007] Step 2: Mix the bottom plugging material mixture, immerse the asbestos packing in the mixture and stir, take out the asbestos packing and wrap it around the leaking point of the pipeline and tie it up tightly, apply the bottom plugging material mixture on the asbestos packing 5 to 10 times, use a hoop to tighten the asbestos packing for 60 minutes and then remove the hoop;

[0008] Step 3: Mix the middle-layer plugging material mixture, immerse the glass fiber felt in the mixture, take out the glass fiber felt and wrap it around the asbestos packing and the outside of the pipe. The number of winding layers should be more than 10. Apply a layer of the middle-layer plugging material mixture on each winding layer.

[0009] Step 4: Mix the middle and surface layer plugging material mixture, immerse the glass cloth in the mixture, take out the glass cloth and wrap it around the glass fiber felt and the pipe. The number of winding layers should be more than 10. Apply a layer of the middle and surface layer plugging material mixture on each winding layer. After solidification, apply the middle and surface layer plugging material mixture on the glass fiber felt and the pipe surface 3 to 5 times.

[0010] Optionally, the bottom plugging material is calculated by weight: 98.0 to 102.0 parts of corrosion-resistant resin, 1.5 to 1.8 parts of amine curing agent, 2.2 to 2.5 parts of EC100 cobalt water rapid accelerator, and 5.0 to 10.0 parts of grade 725 high-alumina cement.

[0011] Optionally, the middle layer plugging material comprises, by weight: 98.0 to 102.0 parts of isophthalic heat-resistant resin, 1.2 to 1.5 parts of epoxy curing agent, and 2.0 to 2.2 parts of EC100 cobalt water rapid accelerator.

[0012] Optionally, the middle surface layer plugging material comprises, by weight: 98 to 102 parts of ortho-phthalic thixotropic resin, 1.0 to 1.2 parts of epoxy curing agent, and 2.0 to 2.2 parts of EC100 cobalt water rapid accelerator.

[0013] Optionally, the bottom layer plugging material, the middle layer plugging material and the middle surface layer plugging material are directly processed into A / B molecular material packages according to the ratio, and when in use, the molecular material packages can be directly torn open and mixed before use.

[0014] Optionally, the bottom layer plugging material, the middle layer plugging material and the middle surface layer plugging material are prepared by mixing the materials in proportion by weight in a zero-gravity mixer for 10 to 15 minutes.

[0015] Optionally, in step 1, the asbestos packing has a width of 100 mm and a thickness of 10 mm. The asbestos packing is filled with a stainless steel wire braided belt and then immersed in the bottom plugging material mixture. The packing is placed in a mixer and stirred intermittently 4 to 5 times at a frequency of stirring for 15 seconds and stopping for 30 seconds.

[0016] Optionally, in step 2, the material of the hoop is flat iron, and the width of the flat iron is 100 mm and the thickness is 4 mm.

[0017] Optionally, the bottom layer winding width is 100 mm, the middle layer winding width is 200 mm, and the middle surface layer winding width is 250 mm.

[0018] Optionally, in step 4, the width of the middle surface layer of the plugging material mixture applied after solidification is 300 mm.

[0019] The beneficial effects of the technical solution of the present invention are:

[0020] The pipeline emergency repair and plugging construction method of the present invention does not require cutting or electric welding during the repair process, and completely avoids the high-risk working environment of repairing combustible gas pipelines or combustible liquid pipelines with media. In addition, the repair process is simple and fast, and rapid and effective repairs can be performed when the pipeline is operating normally, thereby avoiding the safety, economic, environmental and other risks caused by the suspension of pipeline transportation. At the same time, it reduces the high investment of manpower and material resources and improves work efficiency.

[0021] The pipeline emergency repair and plugging construction method of the present invention has a simple operation process, a wide range of applications, a reliable plugging effect, and can be repaired on various types of pipelines, greatly improving the reliability and service life of the pipeline. The simple operation allows normal maintenance workers to complete rapid repairs, lowering the threshold for repairing industrial pipelines with media.

[0022] The materials used in the pipeline emergency repair and plugging construction method of the present invention are acid and alkali resistant and have stable performance, and are suitable for repairing various medium pipelines. At the same time, the materials used are flexible materials and can repair pipelines of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the pipeline emergency repair and plugging construction structure in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the molecular material package structure of the bottom plugging material in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the molecular material package structure of the middle layer and middle surface layer plugging material in an embodiment of the present invention.

[0026] In the attached figure: 1. Asbestos packing, 2. Glass fiber felt, 3. Glass cloth. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] See also Figure 1 and Figure 2 As shown, a construction method for emergency repair and plugging of low-pressure industrial pipelines according to an embodiment is shown, wherein the construction method comprises the following steps:

[0033] Step 1: Polish the 300mm wide area of ​​the pipe leaking point along the circumference of the pipe to reveal a clean metallic luster;

[0034] Step 2: Mix the mixture of the bottom plugging material 1, immerse the asbestos packing in the mixture and stir, take out the asbestos packing and wrap it around the leaking point of the pipeline and tie it up, apply the mixture of the bottom plugging material on the asbestos packing 5 to 10 times, use a band to tighten the asbestos packing for 60 minutes and then remove the band;

[0035] Step 3: Mix the mixed liquid of the middle-layer plugging material 2, immerse the glass fiber felt in the mixed liquid, take out the glass fiber felt and wrap it around the asbestos packing and the outside of the pipe. The number of winding layers should be more than 10. Apply a layer of the mixed liquid of the middle-layer plugging material on each winding layer.

[0036] Step 4: Mix the mixed liquid of the middle and surface layer plugging material 3, immerse the glass cloth in the mixed liquid, take out the glass cloth and wrap it around the glass fiber felt and the outside of the pipe. The number of winding layers should be more than 10. Apply a layer of the mixed liquid of the middle and surface layer plugging material on each winding layer. After solidification, apply the mixed liquid of the middle and surface layer plugging material on the surface of the glass fiber felt and the pipe 3 to 5 times.

[0037] In this embodiment, the bottom plugging material is calculated by weight: 98.0-102.0 parts of corrosion-resistant resin, 1.5-1.8 parts of amine curing agent, 2.2-2.5 parts of EC100 cobalt water rapid accelerator, and 5.0-10.0 parts of grade 725 high-alumina cement.

[0038] In this embodiment, the middle layer plugging material is calculated by weight: 98.0-102.0 parts of isophthalic heat-resistant resin, 1.2-1.5 parts of epoxy curing agent, and 2.0-2.2 parts of EC100 cobalt water rapid accelerator.

[0039] In this embodiment, the middle surface layer plugging material is calculated by weight as follows: 98 to 102 parts of ortho-phthalic thixotropic resin, 1.0 to 1.2 parts of epoxy curing agent, and 2.0 to 2.2 parts of EC100 cobalt water rapid accelerator.

[0040] In this embodiment, the bottom layer plugging material, the middle layer plugging material and the middle surface layer plugging material are directly processed into A / B molecular material packages according to the ratio. When using, the molecular material packages can be directly torn open and mixed before use.

[0041] In this embodiment, the bottom layer plugging material, the middle layer plugging material and the middle surface layer plugging material are prepared by mixing the materials in proportion by weight in a zero-gravity mixer for 10 to 15 minutes.

[0042] In this embodiment, in step 1, the asbestos packing has a width of 100 mm and a thickness of 10 mm. A stainless steel wire braided belt is used to hold the asbestos packing and then immersed in the bottom plugging material mixture. The packing is placed in a mixer and stirred intermittently 4 to 5 times at a frequency of stirring for 15 seconds and stopping for 30 seconds.

[0043] In this embodiment, in step 2, the material of the hoop is flat iron, and the width of the flat iron is 100 mm and the thickness is 4 mm.

[0044] In this embodiment, the winding width of the bottom layer is 100 mm, the winding width of the middle layer is 200 mm, and the winding width of the middle surface layer is 250 mm.

[0045] In this embodiment, in step 4, the width of the middle surface layer of the plugging material mixture applied after solidification is 300 mm.

[0046] The characteristics and functions of the present invention will be further understood through the following description.

[0047] The pipeline emergency repair and plugging construction method of this embodiment has been extensively analyzed and field investigated, combined with the characteristics of various working conditions and various materials. This construction technology fills the gaps in the existing technology and makes it possible to repair low-pressure pipelines safely and quickly, so as to achieve the purpose of rapid repair without stopping equipment, thereby ensuring the safety of people, materials and machines and minimizing losses.

[0048] Specifically, the present embodiment discloses a low-pressure industrial pipeline emergency repair and plugging construction technology, which has the characteristics of short time consumption from discovering the leak to completing the repair, high efficiency and safety, and fast repair by selecting different material ratios for different pipelines. The construction is divided into three layers of construction, wherein the bottom layer plugging material is characterized by: 98.0-102.0 parts of corrosion-resistant resin, 1.5-1.8 parts of amine curing agent, 2.2-2.5 parts of EC100 cobalt water rapid accelerator, 5.0-725 high alumina cement. 10.0 parts; wherein the middle layer plugging material is characterized by, by weight: 98.0-102.0 parts of isophthalic heat-resistant resin, 1.2-1.5 parts of epoxy curing agent, and 2.0-2.2 parts of EC100 cobalt water rapid accelerator; wherein the surface layer plugging material is characterized by, by weight: 98-102 parts of orthophthalic thixotropic resin, 1.0-1.2 parts of epoxy curing agent, and 2.0-2.2 parts of EC100 cobalt water rapid accelerator; and is made by mixing in a weightless mixing mixer for 10-15 minutes.

[0049] The three-layer repair material can be directly processed into A / B molecular material packages according to the ratio. The molecular material packages can be directly torn open and mixed before use. Figure 2 As shown in FIG. 1 , it is a schematic diagram of the molecular material package structure of the bottom plugging material. Figure 3 The figure shows the schematic diagram of the molecular material package structure of the middle layer and middle surface layer plugging material.

[0050] The pipeline emergency repair and plugging construction method of this embodiment includes the following:

[0051] First, polish the 300mm width of the pipe circumference at the leak point to reveal a clean metallic color.

[0052] Bottom layer: Add asbestos packing with a width of 100mm and a thickness of 10mm to the mixed liquid and soak it fully. You can use a stainless steel wire braid to hold the asbestos packing, place it in a mixer and stir for 15s, stop for 30s, stir intermittently for 4 to 5 times, then take it out and quickly wrap it around the leaking point of the pipeline, and tighten it in time. After tightening, use a brush to evenly brush the packing 5 to 10 times to make the packing fully contact with the pipeline. Then use a 100mm wide and 4mm thick flat iron as a hoop, tighten the joint with bolts, and remove the hoop 60 minutes after tightening. The bottom layer winding width is 100mm.

[0053] Middle layer: Soak the glass fiber felt in the mixed liquid, and evenly wrap it around the pipe after it is fully soaked. The number of winding layers should be no less than 10, and a layer of middle layer mixed liquid should be brushed on each winding layer to make it fully bonded. The middle layer winding width is 200mm.

[0054] Surface layer: Soak glass cloth in the mixed liquid, and evenly wrap it around the pipe after it is fully soaked. The number of winding layers should be no less than 10, and a layer of middle layer mixed liquid should be brushed on each layer to make it fully bonded. The surface layer winding width is 250mm. After curing, brush the surface with 3 to 5 coats of surface mixed liquid to make it smoother. The surface mixed liquid brushing width is 300mm.

[0055] In summary, the pipeline emergency repair and plugging construction method of the present invention does not require cutting or electric welding during the repair process, and completely avoids the high-risk working environment of repairing combustible gas pipelines or combustible liquid pipelines with media. In addition, the repair process is simple and fast, and rapid and effective repairs can be performed when the pipeline is operating normally, thereby avoiding the safety, economic, environmental and other risks caused by the suspension of pipeline transportation. At the same time, it reduces the high investment of manpower and material resources and improves work efficiency.

[0056] The pipeline emergency repair and plugging construction method of the present invention has a simple operation process, a wide range of applications, a reliable plugging effect, and can be repaired on various types of pipelines, greatly improving the reliability and service life of the pipeline. The simple operation allows normal maintenance workers to complete rapid repairs, lowering the threshold for repairing industrial pipelines with media.

[0057] The materials used in the pipeline emergency repair and plugging construction method of the present invention are acid and alkali resistant and have stable performance, and are suitable for repairing various medium pipelines. At the same time, the materials used are flexible materials and can repair pipelines of various specifications.

[0058] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-pressure industrial pipeline emergency repair and plugging construction method, characterized in that: The construction method comprises the following steps: Step 1: Polish the 300mm wide area of ​​the leaking point along the circumference of the pipe to reveal a clean metallic luster; Step 2: Mix the bottom plugging material mixture, immerse the asbestos packing in the mixture and stir, take out the asbestos packing and wrap it around the leaking point of the pipeline and tie it up tightly, apply the bottom plugging material mixture on the asbestos packing 5 to 10 times, use a hoop to tighten the asbestos packing for 60 minutes and then remove the hoop; Step 3: Mix the middle-layer plugging material mixture, immerse the glass fiber felt in the mixture, take out the glass fiber felt and wrap it around the asbestos packing and the outside of the pipe. The number of winding layers should be more than 10. Apply a layer of the middle-layer plugging material mixture on each winding layer. Step 4: Mix the middle and surface layer plugging material mixture, immerse the glass cloth in the mixture, take out the glass cloth and wrap it around the glass fiber felt and the pipe. The number of winding layers should be more than 10. Apply a layer of the middle and surface layer plugging material mixture on each winding layer. After solidification, apply the middle and surface layer plugging material mixture on the glass fiber felt and the pipe surface 3 to 5 times.

2. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 1 is characterized in that: The bottom plugging material is calculated by weight: 98.0-102.0 parts of corrosion-resistant resin, 1.5-1.8 parts of amine curing agent, 2.2-2.5 parts of EC100 cobalt water rapid accelerator, and 5.0-10.0 parts of grade 725 high alumina cement.

3. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 2 is characterized in that: The middle layer plugging material is calculated by weight: 98.0-102.0 parts of isophthalic heat-resistant resin, 1.2-1.5 parts of epoxy curing agent, and 2.0-2.2 parts of EC100 cobalt water rapid accelerator.

4. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 3 is characterized in that: The middle surface layer plugging material is calculated by weight: 98-102 parts of ortho-phthalic thixotropic resin, 1.0-1.2 parts of epoxy curing agent, and 2.0-2.2 parts of EC100 cobalt water rapid accelerator.

5. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 4 is characterized in that: The bottom layer plugging material, the middle layer plugging material and the middle surface layer plugging material are directly processed into A / B molecular material packages according to the proportions. When using, the molecular material packages can be directly torn open and mixed before use.

6. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 5 is characterized in that: The bottom layer plugging material, the middle layer plugging material and the middle surface layer plugging material are prepared by mixing the materials in proportion by weight in a zero-gravity mixing and stirring machine for 10 to 15 minutes.

7. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 1 is characterized in that: In step 1, the asbestos packing has a width of 100 mm and a thickness of 10 mm. The asbestos packing is filled with a stainless steel wire braided belt and then immersed in the bottom plugging material mixture. The packing is placed in a mixer and stirred intermittently 4 to 5 times at a frequency of stirring for 15 seconds and stopping for 30 seconds.

8. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 1 is characterized in that: In step 2, the material of the hoop is flat iron, the width of the flat iron is 100 mm, and the thickness is 4 mm.

9. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 1 is characterized in that: The bottom layer winding width is 100 mm, the middle layer winding width is 200 mm, and the middle surface layer winding width is 250 mm.

10. The low-pressure industrial pipeline emergency repair and plugging construction method according to claim 1 is characterized in that: In step 4, the width of the middle surface layer of plugging material mixture applied after solidification is 300 mm.

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