Sealing device for alkali pipelines

Abstract

The utility model discloses a kind of sealing leak stoppage devices of alkali pipeline, belong to alkali pipeline maintenance technical field, the sealing leak stoppage device of alkali pipeline includes mutually symmetrical first shell and second shell, sealing assembly being arranged between the first shell and the second shell, positioning sealing structure being connected to the peripheral surface of the first shell and the second shell, glue injection port being communicated to the outer periphery of the first shell, clamping mechanism being arranged at the both ends of the first shell and the second shell;The device can complete leak stoppage under the condition that alkali pipeline normally conveys medium, avoid production interruption, through the double sealing structure of sealing washer and glue injection sealant, it can be adapted to strong alkali working condition, the stable effect of plugging, realize long-term use, and adopt polytetrafluoroethylene and fluorine rubber composite sealing, can long-term resist strong alkali medium corrosion, solve the problem that traditional sealing element is easy to fail.

Description

Technical Field

[0001] This utility model belongs to the field of alkali pipeline maintenance technology, specifically relating to a sealing and leak-stopping device for alkali pipelines. Background Technology

[0002] In industries such as chemical, metallurgical, and pharmaceutical manufacturing, alkali pipelines are critical components for transporting alkaline solutions such as sodium hydroxide and sodium carbonate. Their stable operation directly ensures continuous and safe production. Alkaline media are highly reactive, and long-term transport will continuously corrode the pipe walls, leading to thinning and perforation. Simultaneously, equipment vibration, installation stress, and fluctuations in medium pressure exacerbate pipeline fatigue, causing joint seal failure and loosening, ultimately resulting in alkali leakage. Alkali leakage not only wastes raw materials and corrodes equipment but can also cause safety accidents and threaten personnel safety. Therefore, ensuring the sealing and stability of alkali pipelines is a crucial issue for these industries.

[0003] Existing alkali pipeline leak-sealing technologies have significant drawbacks: the mainstream method requires shutting down the system to cut off the alkali supply, followed by welding and pipe replacement repairs, which inevitably leads to production interruptions and causes huge economic losses for enterprises with continuous production. Furthermore, the residual alkali solution must be disposed of after shutdown, which is cumbersome and prone to safety hazards. Some sealing and leak-sealing devices, due to structural and material limitations, have poor sealing and corrosion resistance, providing only emergency sealing and failing to provide long-term protection, making them prone to re-leakage, increasing maintenance costs, and potentially exacerbating pipeline damage. Therefore, there is an urgent need for a new sealing and leak-sealing device for alkali pipelines. Utility Model Content

[0004] To address some or all of the technical problems existing in the prior art, this utility model provides a sealing and leak-stopping device for an alkali pipeline. The sealing and leak-stopping device is fitted around the leak point of the alkali pipeline. The device includes a first housing and a second housing arranged symmetrically, a sealing assembly disposed between the first housing and the second housing, a positioning and sealing structure connected to the circumferential surfaces of the first housing and the second housing, an injection port communicating with the outer periphery of the first housing, and clamping mechanisms disposed at both ends of the first housing and the second housing. Wherein: The first housing and the second housing are detachably connected by a bolt assembly. After connection, a cavity matching the alkali pipeline is formed inside, and the position of the cavity matches the leak point. The sealing assembly includes an outer liner fixedly attached to the inner wall of the first housing and the inner wall of the second housing, and an inner liner attached to the outer wall of the alkali pipe; The positioning and sealing structure is disposed between the first housing and the second housing. The mating surface of the first housing is provided with an annular boss, and the mating surface of the second housing is provided with an annular groove that matches the annular boss. The first housing and the second housing are connected by the fitting between the annular boss and the annular groove. One end of the glue injection interface penetrates through the first housing and extends to the gap between the first housing and the outer wall of the alkali pipe, while the other end is fitted with and connected to a sealing cap.

[0005] Furthermore, in the sealing and plugging device for the aforementioned alkali pipeline, the clamping mechanism is an arc-shaped clamp with an anti-slip pad on the inner side and the two ends of the clamp are fastened with wing bolts.

[0006] Furthermore, in the sealing and plugging device for the above-mentioned alkali pipeline, a sealing ring is provided between the annular boss and the annular groove.

[0007] Furthermore, in the sealing and plugging device for the above-mentioned alkali pipeline, the sealing ring is a fluororubber sealing ring, and the cross-section of the sealing ring is trapezoidal.

[0008] Furthermore, in the above-mentioned sealing and plugging device for alkali pipelines, both the first housing and the second housing are made of stainless steel, and both the outer walls of the first housing and the second housing are provided with reinforcing ribs.

[0009] Furthermore, in the sealing and plugging device for the above-mentioned alkali pipeline, the inner lining is a polytetrafluoroethylene inner lining with a thickness of 2 mm to 3 mm.

[0010] Furthermore, in the sealing and plugging device for the above-mentioned alkali pipeline, the outer lining is a fluororubber outer lining with a thickness of 3 mm to 5 mm, and the outer wall of the outer lining is provided with anti-slip texture.

[0011] Furthermore, in the above-mentioned sealing and plugging device for alkali pipelines, the number of bolt assemblies is 4 to 8, and they are evenly distributed at both ends of the first housing and the second housing.

[0012] The sealing and leak-stopping device for alkali pipelines of this utility model has the following advantages and beneficial effects: This device can seal leaks in alkaline pipelines while they are normally transporting media, preventing production interruptions. Its dual-sealing structure, combining a gasket and sealant, is suitable for strong alkaline conditions, providing stable sealing and long-term use. The composite seal of PTFE and fluororubber ensures long-term resistance to strong alkaline corrosion, solving the problem of easy failure of traditional seals. Furthermore, the positioning design of the wing bolts, annular bosses, and annular grooves eliminates the need for specialized tools, allowing for quick installation and disassembly, meeting online leak sealing requirements. It is compatible with various specifications of alkaline pipelines and has excellent applicability. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for further understanding of the embodiments of this utility model and constitute a part of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the sealing and plugging device for alkali pipelines according to this utility model. Figure 2 This is a side view of the sealing and plugging device for alkali pipelines according to this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. First housing; 2. Second housing; 3. Sealing assembly; 4. Positioning and sealing structure; 5. Glue injection interface; 6. Clamping mechanism; 10. Bolt assembly; 20. Reinforcing rib; 401. Sealing ring; 501. Sealing cap; 601. Arc-shaped clamp; 602. Wing bolt. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] like Figure 1 , Figure 2As shown, this utility model discloses a sealing and leak-stopping device for an alkali pipeline. The sealing and leak-stopping device is sleeved around the leak point of the alkali pipeline. The sealing and leak-stopping device for the alkali pipeline includes a first housing 1 and a second housing 2 arranged symmetrically, a sealing assembly 3 disposed between the first housing 1 and the second housing 2, a positioning and sealing structure 4 connected to the peripheral surfaces of the first housing 1 and the second housing 2, an injection port 5 communicating with the outer periphery of the first housing 1, and a clamping mechanism 6 disposed at both ends of the first housing 1 and the second housing 2. The first housing 1 and the second housing 2 are detachably connected by a bolt assembly 10. The bolt assembly 10 is coated with a polytetrafluoroethylene anti-corrosion layer, and after connection, an internal cavity matching the alkali pipeline is formed. The cavity position is matched to the leak point; the sealing assembly 3 includes an outer liner fixedly attached to the inner wall of the first housing 1 and the inner wall of the second housing 2, and an inner liner attached to the outer wall of the alkali pipe. The inner and outer liners are bonded together by high-temperature vulcanization to prevent delamination and peeling; the positioning sealing structure 4 is set between the first housing 1 and the second housing 2. The mating surface of the first housing 1 is provided with an annular boss, and the mating surface of the second housing 2 is provided with an annular groove matching the annular boss. The first housing 1 and the second housing 2 are connected by the fitting between the annular boss and the annular groove; one end of the glue injection interface 5 penetrates through the first housing 1 and extends to the gap between the first housing 1 and the outer wall of the alkali pipe, and the other end is adapted to and connected to a sealing cap 501.

[0017] In one specific embodiment, in the sealing and plugging device for alkali pipelines of this utility model, the clamping mechanism 6 is an arc-shaped clamp 601 with an anti-slip pad on the inner side of the clamp. The two ends of the clamp are fastened by wing bolts 602. No special tools are required to achieve a tight clamping between the device and the pipeline. At the same time, the anti-slip pad prevents the device from sliding and enhances the sealing performance.

[0018] In one specific embodiment, in the sealing and plugging device for the alkali pipeline of this utility model, a sealing ring 401 is provided between the annular boss and the annular groove. This arrangement enables precise positioning and secondary sealing at the joint between the annular boss and the annular groove, preventing alkali liquid from leaking from the joint.

[0019] As a specific embodiment, in the sealing and plugging device for alkali pipelines of this utility model, the sealing ring 401 is a fluororubber sealing ring 401, and the cross-section of the sealing ring 401 is trapezoidal. Fluororubber has strong performance, and the trapezoidal cross-section design can make the sealing ring 401 fit more tightly against the outer wall of the pipeline when the bolts are tightened, thereby improving the sealing reliability.

[0020] As a specific embodiment, in the sealing and plugging device for alkali pipelines of this utility model, both the first shell 1 and the second shell 2 are made of stainless steel, more specifically, 304 stainless steel. The outer walls of both the first shell 1 and the second shell 2 are provided with reinforcing ribs 20. The reinforcing ribs 20 are arranged along the length direction of the first shell 1 and the second shell 2, which can improve the structural strength of the shell and prevent the device from deforming under pipeline pressure.

[0021] As one specific embodiment, in the sealing and plugging device for alkali pipelines of this utility model, the inner lining is a polytetrafluoroethylene inner lining, which is corrosion-resistant and has a low coefficient of friction, and the thickness is set to 2 mm ~ 3 mm.

[0022] As one specific embodiment, in the sealing and plugging device for alkali pipelines of this utility model, the outer lining is a fluororubber outer lining with a thickness of 3 mm to 5 mm. The fluororubber outer lining has good elasticity and can fill the tiny depressions on the pipeline surface, improving the sealing performance. The outer wall of the outer lining is provided with anti-slip texture.

[0023] In one specific embodiment, in the sealing and plugging device for the alkali pipeline of this utility model, the number of bolt assemblies 10 is 4 to 8, and they are evenly distributed at both ends of the first housing 1 and the second housing 2. More specifically, the number of bolt assemblies 10 is 6. Of course, the number of bolt assemblies 10 needs to be set according to the size of the first housing 1 and the second housing 2 in actual use.

[0024] The working principle of the sealing and plugging device for alkali pipelines of this utility model is as follows: When a leak occurs in the alkali pipeline, there is no need to stop the machine. First, clean the impurities and residual alkali around the leak point. Then, symmetrically fasten the first housing 1 and the second housing 2 to the leak point of the alkali pipeline, with the cavity corresponding to the leak point of the alkali pipeline, so that the inner lining layer fits against the outer wall of the pipeline. Tighten the bolt assembly 10 to secure the first housing 1 and the second housing 2. At this time, the sealing ring 401 is compressed and deformed, achieving a preliminary seal. Then, open the sealing cover 501 of the glue injection interface 5 and inject corrosion-resistant sealant into the gap between the device and the pipeline through the glue injection interface 5. Tighten the sealing cover 501. After the sealant cures, a secondary seal is formed, further improving the leak-stopping effect and completing the sealing and leak-stopping operation.

[0025] In summary, compared with the prior art, the sealing and plugging device for alkali pipelines of this utility model has the following advantages and beneficial effects: This device can seal leaks in alkaline pipelines while they are normally transporting media, preventing production interruptions. Its dual-sealing structure, combining a gasket and sealant, makes it suitable for strong alkaline conditions, providing stable sealing and long-term use. The composite seal of PTFE and fluororubber ensures long-term resistance to strong alkaline corrosion, solving the problem of easy failure of traditional seals. Furthermore, the positioning design of the 602 wing bolts with annular bosses and grooves eliminates the need for specialized tools, allowing for quick installation and disassembly, meeting online leak sealing requirements. It is compatible with various specifications of alkaline pipelines and has excellent applicability.

[0026] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement state shown in the accompanying drawings.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sealing and leak-stopping device for an alkali pipeline, wherein the sealing and leak-stopping device is sleeved around the leak point of the alkali pipeline, characterized in that, The sealing and plugging device for the alkali pipeline includes a first housing and a second housing arranged symmetrically to each other, a sealing assembly disposed between the first housing and the second housing, a positioning sealing structure connected to the periphery of the first housing and the second housing, an injection port communicating with the outer periphery of the first housing, and a clamping mechanism disposed at both ends of the first housing and the second housing, wherein: The first housing and the second housing are detachably connected by a bolt assembly. After connection, a cavity matching the alkali pipeline is formed inside, and the position of the cavity matches the leak point. The sealing assembly includes an outer liner fixedly attached to the inner wall of the first housing and the inner wall of the second housing, and an inner liner attached to the outer wall of the alkali pipe; The positioning and sealing structure is disposed between the first housing and the second housing. The mating surface of the first housing is provided with an annular boss, and the mating surface of the second housing is provided with an annular groove that matches the annular boss. The first housing and the second housing are connected by the fitting between the annular boss and the annular groove. One end of the glue injection interface penetrates through the first housing and extends to the gap between the first housing and the outer wall of the alkali pipe, while the other end is fitted with and connected to a sealing cap.

2. The sealing and plugging device for alkali pipelines according to claim 1, characterized in that, The clamping mechanism is an arc-shaped clamp with an anti-slip pad on the inner side and the two ends of the clamp are fastened with wing bolts.

3. The sealing and plugging device for alkali pipelines according to claim 1, characterized in that, A sealing ring is provided between the annular boss and the annular groove.

4. The sealing and plugging device for alkali pipelines according to claim 3, characterized in that, The sealing ring is a fluororubber sealing ring, and the cross-section of the sealing ring is trapezoidal.

5. The sealing and plugging device for alkali pipelines according to claim 1, characterized in that, Both the first housing and the second housing are made of stainless steel, and both the first housing and the second housing have reinforcing ribs on their outer walls.

6. The sealing and plugging device for alkali pipelines according to claim 1, characterized in that, The inner lining is a polytetrafluoroethylene (PTFE) lining with a thickness of 2 mm to 3 mm.

7. The sealing and plugging device for alkali pipelines according to claim 1, characterized in that, The outer lining is a fluororubber lining with a thickness of 3 mm to 5 mm, and the outer wall of the outer lining is provided with anti-slip texture.

8. The sealing and plugging device for alkali pipelines according to claim 1, characterized in that, The number of bolt assemblies is 4 to 8, and they are evenly distributed at both ends of the first housing and the second housing.

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