Pipeline plugging assembly

Abstract

The invention belongs to the field of pipelines, and particularly relates to a pipeline plugging assembly which comprises a plugging piece and a restraint strap, and the restraint strap is used for winding and fixing the plugging piece to a pipeline so that the plugging piece can be kept in a stable state; the plugging piece comprises a base piece and sealing rings, the base piece can deform to be matched with the outline of the outer wall of the pipeline, the flexible base piece is provided with at least two annular grooves, the annular grooves are distributed in a concentric mode, the sealing rings are contained and installed in the annular grooves respectively, and the sealing rings protrude out of the annular grooves. The invention provides a pipeline plugging assembly. The pipeline plugging assembly aims at solving the problems that in the prior art, a plugging structure is long in installation time and insufficient in reliability.

Description

Technical Field

[0001] This invention belongs to the field of pipelines, and specifically relates to a pipeline sealing component. Background Technology

[0002] In critical sectors such as industrial production, transportation, and national defense, containers and pipeline systems, as core components for fluid transport, have long faced the problem of perforation or cracking caused by factors such as corrosion, mechanical impact, and fatigue fracture. Such structural damage can easily lead to leaks of oil, gas, and other hazardous media, causing not only severe economic losses but also directly threatening production safety and the ecological environment. Currently, emergency leak sealing technologies for pipelines and containers mainly include mechanical clamp sealing, adhesive injection sealing, welding repair, and rubber gaskets with clamp fixation.

[0003] However, practical experience and research have revealed that existing leak-sealing technologies still have shortcomings and are insufficient to meet usage requirements. Specific shortcomings are as follows: First, existing leak-sealing solutions generally suffer from insufficient emergency adaptability. Traditional welding repairs and mechanical clamp sealing techniques typically require complex specialized tools and skilled technicians, and emergency response times often take several hours, making them unsuitable for handling sudden leaks. Second, existing technologies have limited adaptability to irregular damage patterns and complex operating conditions. Under conditions of high temperature, high pressure, and frequent pressure fluctuations, existing sealing elements often fail due to insufficient compression and resilience.

[0004] Therefore, there is an urgent need in this field for a leak-sealing structure that can balance emergency response and reliability, thereby addressing the shortcomings of existing technologies. Summary of the Invention

[0005] This invention provides a pipe plugging component, which aims to solve the problems of long installation time and insufficient reliability of existing plugging structures.

[0006] To achieve the above objectives, the present invention provides a pipe plugging assembly, including a plugging plate and a restraining band. The restraining band is used to wrap and fix the plugging plate to the pipe, so that the plugging plate remains stable. The plugging plate includes a base plate and a sealing ring. The base plate is deformable to adapt to the outer wall contour of the pipe. The flexible base plate is constructed with annular grooves. There are at least two annular grooves, which are concentrically distributed. The sealing ring is installed in each annular groove, and the sealing ring protrudes from the annular groove.

[0007] Preferably, the sealing plate further includes a first spiral groove, and adjacent annular grooves are connected through the first spiral groove, so that microchannels are formed between the annular grooves.

[0008] Preferably, the depth of the first spiral groove is 0.05mm to 0.1mm, the width is 0.2mm to 0.3mm, and the spiral angle is 15° to 30°.

[0009] Preferably, the sealing plate further includes a second spiral groove, which is formed in the edge region of the sealing plate and is in communication with the outermost annular groove.

[0010] Preferably, the second spiral groove is in a closed state with respect to the outside world.

[0011] Preferably, the sealing plate further includes a receiving groove located in the central region of the sealing plate and in the inner ring of the annular groove.

[0012] Preferably, the receiving groove is a circular groove.

[0013] The receiving groove is located at the center of the annular groove.

[0014] Preferably, the sealing ring is made of nitrile rubber or fluororubber.

[0015] Preferably, the constraint band is wrapped in multiple layers when fixing the sealing piece; The winding tension of the constraint band decreases in a gradient, with the winding tension of the inner constraint band being greater than that of the outer constraint band.

[0016] Preferably, the number of wrapping layers of the constraint band is determined by the radial clamping pressure calculation method. This method mainly includes the following steps; S1, assuming different layer numbers Calculate the effective tension provided by the constraint band. ; ,in, The initial tension is constant. Let be the average radius of the i-th layer. The average radius of the outermost layer, To constrain the number of outermost layers; ,in, The average winding radius, Let be the thickness of the constraint band, and i be the i-th layer; ,in, The average winding radius, The thickness of the constraint band, To constrain the number of outermost layers; S2, through effective tension Calculate the average effective tension provided by the constraint band. ; ,in, To constrain the number of outermost layers; S3, through average effective tension Calculate radial clamping force ; ,in, To constrain the number of outermost layers, The average winding radius, This refers to the width of the stainless steel strip; S4, Determine radial clamping force Is it greater than or equal to the threshold? like If the number of constraint band wrapping layers is greater than the threshold, then the required number of wrapping layers is met. like If the value is less than the threshold, the number of constraint band wrapping layers needs to be increased.

[0017] The beneficial effects of this invention are as follows: When using the pipe sealing assembly in this solution, the sealing plate only needs to be attached to the leaking area, and then the sealing plate is wrapped and fixed with a restraining strap, so that the sealing plate is subjected to pressure and blocks the leaking area. This pipe sealing assembly is convenient to use and requires less installation time, thus meeting the needs of emergency pipe sealing.

[0018] The sealing plate in this solution incorporates multiple sealing rings. Once the sealing plate is fixed in place, the sealing rings are positioned between the base plate and the outer wall of the pipe. The sealing rings deform under stress, thereby sealing the gap between the base plate and the outer wall of the pipe, thus preventing leakage. Furthermore, because multiple sealing rings are used, even if one sealing ring deforms and leaks, the others can still maintain a seal. The pipe sealing assembly in this solution offers excellent sealing performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the pipe sealing assembly.

[0020] Figure 2 This is a schematic diagram of a sealing plate.

[0021] Figure 3 This is a cross-sectional view of the sealing plate at point AA.

[0022] Figure 4 This is a schematic diagram of the method in Example 2.

[0023] The reference numerals in the attached drawings include: sealing plate 1, substrate 11, sealing ring 12, first spiral groove 13, second spiral groove 14, receiving groove 15, and restraint band 2. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0025] The basic implementation examples are as follows: Figures 1 to 3 As shown, a pipeline sealing component is mainly used for emergency leak sealing in high-pressure scenarios such as high-pressure water pipelines, offshore platform oil and gas pipelines, and hydraulic pipelines of engineering machinery. It can be adapted to oil, air, or other media.

[0026] The pipe plugging assembly of this embodiment includes a plugging piece 1 and a restraining band 2. The plugging piece 1 is wrapped and fixed to the pipe by the restraining band 2. When the restraining band 2 wraps and fixes the plugging piece 1 to the pipe, the restraining band 2 is wrapped in multiple layers, thereby making the plugging piece 1 more stable. The restraining band 2 is specifically a stainless steel band. At the same time, in order to fix the ends of the restraining band 2 and prevent the restraining band 2 from loosening, the two ends of the restraining band 2 can be welded and fixed.

[0027] To achieve a better sealing effect, the winding tension of the constraint band 2 decreases gradually during winding; that is, the winding tension of the inner constraint band 2 is greater than that of the outer constraint band 2. During multi-layer winding, the outer constraint band 2 applies radial compressive force to the inner layer, causing the inner ring tension to decrease. Therefore, the gradient tension winding strategy proposed in this embodiment first winds the inner layer with a higher tension (e.g., 85N~90N), and then gradually reduces the tension (e.g., 75N~80N) to ensure a more uniform distribution of overall preload.

[0028] In this embodiment, the sealing plate 1 uses a substrate 11 as its core load-bearing structure. The substrate 11 is made of stainless steel, aluminum alloy, or titanium alloy, possessing good ductility, corrosion resistance, and a certain degree of rigidity. The substrate 11 can be manually pressed and deformed to conform to the contour of the pipe's outer wall or irregular damaged surface. The substrate 11 is generally disc-shaped, and its diameter can be set in different specifications (e.g., Φ80mm~Φ200mm) to ensure that the diameter of the substrate 11 can adapt to the damaged area of ​​the pipe. The thickness of the substrate 11 is designed to be 0.6mm~1.0mm, preferably 0.8mm. This thickness of substrate 11 can achieve a bending deformation of ±30° while ensuring structural rigidity, thereby deforming and conforming to the outer wall of the pipe.

[0029] In this embodiment, an annular groove is formed on the front side of the substrate 11 using a precision etching process. The groove is 6 mm wide and 1.2 mm deep, and is circular. There are two or more annular grooves, preferably two to six. All grooves are concentrically arranged with equal spacing. A sealing ring 12 is installed inside each groove. The sealing ring 12 is circular, and its diameter matches the diameter of the groove. The sealing ring 12 is made of nitrile rubber (NBR). When the sealing ring 12 is in its original state, its upper end protrudes from the groove. The original thickness of the sealing ring 12 is 1.5 mm, with a compression rate of 25%, resulting in a compressed height of approximately 1.125 mm.

[0030] To achieve a better sealing effect, a first spiral groove 13 is constructed on the sealing surface in this embodiment. The first spiral groove 13 is formed by etching with a fiber laser. The depth of the first spiral groove 13 is 0.05mm to 0.1mm, preferably 0.08mm; the width is 0.2mm to 0.3mm, preferably 0.25mm; and the spiral angle is 15° to 30°, preferably 20°. The first spiral groove 13 connects two adjacent annular grooves, forming a micro-connected channel between the annular grooves.

[0031] It is understandable that because adjacent annular grooves are connected by the first spiral groove 13, micro-connected channels are formed between the annular grooves. If a small amount of medium attempts to flow from one annular groove to another, it must pass through the first spiral groove 13. Furthermore, because the first spiral groove 13 has an extremely narrow cross-section and a long flow path, the medium experiences significant frictional losses and pressure drops during its flow within the first spiral groove 13, thereby effectively suppressing the leakage driving force and achieving leakage control.

[0032] In this embodiment, a second spiral groove 14 is also constructed at the edge region of the substrate 11, and the second spiral groove 14 is connected to the outermost annular groove. Therefore, when a small amount of medium attempts to flow from the outermost annular groove to the outside, it must pass through the second spiral groove 14. Furthermore, because the second spiral groove 14 has an extremely narrow cross-section and a long flow path, the medium generates significant frictional losses and pressure drops during its flow within the second spiral groove 14, thereby effectively suppressing the leakage driving force and achieving leakage control.

[0033] In this embodiment, the second spiral groove 14 is not connected to the outside. Therefore, when a medium enters the second spiral groove 14, since the second spiral groove 14 is not connected to the outside, the gas inside the second spiral groove 14 cannot be freely released to the outside. The gas is in a closed state, which has a sealing effect on the medium and further improves the sealing effect.

[0034] Since burrs or protruding edges often exist at the damaged areas of pipes, to prevent these burrs or protruding edges from lifting the substrate 11 and causing deformation, this embodiment provides a receiving groove 15 in the central region of the substrate 11. The receiving groove 15 can be a circular groove or a square groove. The receiving groove 15 is also located in the central region of the annular groove. The diameter of the receiving groove 15 is larger than the size of the damaged area of ​​the pipe, and the edges of the receiving groove 15 are rounded to reduce stress concentration. When the substrate 11 is fitted to the outer wall of the pipe, the burrs or protruding edges are located inside the receiving groove 15, preventing them from contacting the substrate 11 and preventing the substrate 11 from being lifted and deformed.

[0035] The following detailed description of the specific implementation method further illustrates the following: When sealing is required, the receiving groove 15 of the sealing component is positioned corresponding to the damaged area of ​​the pipeline, with the damaged area entirely within the receiving groove 15. The sealing component is then wrapped and fixed to the outer wall of the pipeline using the restraint strap 2. When the medium leaks, due to the internal pressure, the medium pushes the sealing ring 12 from the inside out, causing it to expand and deform, squeezing into the tiny gap between the outer wall of the pipeline and the sealing component, thereby achieving a sealing effect at the damaged area. Simultaneously, because multiple sealing rings 12 are provided, they form a multi-layered dynamic sealing barrier.

[0036] If a small amount of medium attempts to flow from one annular groove to another, it must pass through the first spiral groove 13. Furthermore, due to the extremely narrow cross-section and long flow path of the first spiral groove 13, the medium experiences significant frictional losses and pressure drops during its flow within the first spiral groove 13, thereby effectively suppressing the leakage driving force and achieving leakage control.

[0037] Example 2 This embodiment is an improvement on embodiment 1, such as... Figure 4 As shown, in order to achieve a better sealing effect, this embodiment proposes a method to determine whether the number of wrapping layers of the constraint band is compliant by calculating the radial compression pressure. This method mainly includes the following steps; S1, assuming different numbers of constraint band winding layers, calculate the effective tension provided by the constraint band. ; ,in, The initial tension is constant. Let be the average radius of the i-th layer. The average radius of the outermost layer, To constrain the number of outermost layers; ,in, The average winding radius, Let be the thickness of the constraint band, and i be the i-th layer; ,in, The average winding radius, The thickness of the constraint band, To constrain the number of outermost layers.

[0038] S2, through effective tension Calculate the average effective tension provided by the constraint band. ; ,in, To constrain the number of outermost layers.

[0039] S3, through average effective tension Calculate radial clamping force ; ,in, To constrain the number of outermost layers, The average winding radius, This refers to the width of the stainless steel strip; S4, Determine radial clamping force Is it greater than or equal to the threshold? like If the number of constraint band wrapping layers is greater than the threshold, then the required number of wrapping layers is met. like If the value is less than the threshold, the number of constraint band wrapping layers needs to be increased.

[0040] The following calculation uses the radial clamping pressure calculation method for specific calculations: When using stainless steel strips to seal a 40mm pipe, it is necessary to ensure that a pressure of ≥10MPa is applied to the pipe wall. Stainless steel strip thickness. The width of the stainless steel strip is 0.1mm. The initial tension of the stainless steel strip is 5mm. The average winding radius of the stainless steel strip is a constant value of 80N. The average winding radius is 40mm, and the specific winding radius is determined by the size of the pipe.

[0041] Substitute values ​​of n, starting from 1, into the calculation formula to determine if the radial clamping force meets the requirement of ≥10 MPa. When n=30, the calculation results are as follows:

[0042] Then calculate the average effective tension , ; Then calculate the actual radial clamping pressure. , Since 11.25 MPa is greater than 10 MPa, when using stainless steel tape to seal a 40 mm pipe, wrapping the tape 30 times can meet the usage requirements.

[0043] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A pipe plugging assembly, characterized in that: It includes a sealing piece (1) and a restraining band (2), wherein the restraining band (2) is used to wrap and fix the sealing piece (1) around the pipe so that the sealing piece (1) remains in a stable state; The sealing plate (1) includes a substrate (11) and a sealing ring (12). The substrate (11) is deformable to fit the outer wall contour of the pipe. The flexible substrate (11) is constructed with annular grooves. There are at least two annular grooves, and the annular grooves are distributed in a concentric circle. The sealing ring (12) is installed in each annular groove, and the sealing ring (12) protrudes from the annular groove.

2. The pipe plugging assembly according to claim 1, characterized in that: The sealing plate (1) also includes a first spiral groove (13), and adjacent annular grooves are connected through the first spiral groove (13) so that microchannels are formed between the annular grooves.

3. The pipe plugging assembly according to claim 2, characterized in that: The first spiral groove (13) has a depth of 0.05 mm to 0.1 mm, a width of 0.2 mm to 0.3 mm, and a spiral angle of 15° to 30°.

4. The pipe plugging assembly according to claim 1, characterized in that: The sealing plate (1) further includes a second spiral groove (14), which is constructed in the edge region of the sealing plate (1) and is in communication with the outermost annular groove.

5. The pipe plugging assembly according to claim 4, characterized in that: The second spiral groove (14) is in a closed state with the outside world.

6. The pipe plugging assembly according to claim 1, characterized in that: The sealing piece (1) further includes a receiving groove (15), which is located in the middle region of the sealing piece (1) and is located in the inner ring of the annular groove.

7. The pipe plugging assembly according to claim 6, characterized in that: The receiving groove (15) is a circular groove; And / or, the receiving groove (15) is located at the center of the annular groove.

8. The pipe plugging assembly according to claim 1, characterized in that: The sealing ring (12) is made of nitrile rubber or fluororubber.

9. The pipe plugging assembly according to any one of claims 1 to 8, characterized in that: When the sealing piece (1) is fixed, the constraint band (2) is wrapped in multiple layers; The winding tension of the constraint band (2) decreases in a gradient, with the winding tension of the inner constraint band (2) being greater than that of the outer constraint band (2).

10. The pipe plugging assembly according to claim 9, characterized in that: The number of winding layers of the constraint band (2) is determined by radial compression pressure calculation method. This method mainly includes the following steps: S1, assuming different layer numbers Calculate the effective tension provided by the constraint band. ; ,in, The initial tension is constant. Let be the average radius of the i-th layer. The average radius of the outermost layer, To constrain the number of outermost layers; ,in, The average winding radius, Let be the thickness of the constraint band, and i be the i-th layer; ,in, The average winding radius, The thickness of the constraint band, To constrain the number of outermost layers; S2, through effective tension Calculate the average effective tension provided by the constraint band. ; ,in, To constrain the number of outermost layers; S3, through average effective tension Calculate radial clamping force ; ,in, To constrain the number of outermost layers, The average winding radius, This refers to the width of the stainless steel strip; S4, Determine radial clamping force Is it greater than or equal to the threshold? like If the number of constraint band wrapping layers is greater than the threshold, then the required number of wrapping layers is met. like If the value is less than the threshold, the number of constraint band wrapping layers needs to be increased.

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