Double-channel grading sealing gasket structure of pipeline repairing device

Abstract

The utility model discloses a double-channel grading sealing gasket structure of a pipeline repairing device, which relates to the technical field of pipeline repairing devices and comprises an upper shell of the pipeline repairing device, a lower shell of the pipeline repairing device and two groups of sealing gaskets, and the two groups of sealing gaskets are respectively arranged on the inner walls of the upper shell and the lower shell; the sealing gasket comprises two gasket body straight edge sections, two outer arc edge sections and two inner arc edge sections, the two outer arc edge sections and the two inner arc edge sections are connected between the two gasket body straight edge sections, the two outer arc edge sections are arranged at the two ends of the two gasket body straight edge sections, and the two inner arc edge sections are arranged on the inner sides of the two outer arc edge sections and do not make contact with the outer arc edge sections. The inner ring radius of the inner arc edge section is larger than the inner ring radius of the outer arc edge section, when the pipe diameter of the pipeline has negative tolerance, sealing can be achieved through the outer arc edge section, when the pipe diameter of the pipeline is standard, the outer arc edge section is excessively compressed, the inner arc edge section is normally compressed, and the overall internal stress of the outer arc edge section and the inner arc edge section is improved. The sealing performance of the sealing gasket can be prevented from being sharply reduced, and the service life is prolonged.

Description

A dual-stage sealing gasket structure for a pipe repair device Technical Field

[0001] This utility model relates to the field of pipe repair device technology, specifically to a double-stage sealing gasket structure for a pipe repair device. Background Technology

[0002] Pipe repair kits play a significant role in the rapid repair of urban fluid transport pipelines, particularly in the rapid repair of urban water supply pipelines. Most pipe repair kits are of a split-type structure, with their main components being upper and lower shells and upper and lower sealing rubber gaskets.

[0003] Existing half-type pipe repair fittings use rubber gaskets as sealing components. These gaskets consist of straight and curved sections. When the upper and lower shells are combined with the rubber gaskets and installed on the pipe, the straight sections of the upper and lower rubber gaskets fit together, and the inner surface of the curved section fits against the pipe. Through compression, they work together to create a seal. However, the curved section is mostly a single, curved structure. The commonly claimed double seal is simply an additional groove added to the curved unit, not a true double seal.

[0004] Patent document CN221221906U discloses a new anti-slip pipe repair device. In this patent, although multiple arc-shaped structures appear on its arc edge section, this is mainly to widen the contact surface with the pipe to adapt to the anti-slip function. The internal stress of the widened part is different from that of the whole part under compression. It is mainly to increase the friction to achieve the anti-slip function. Therefore, the widened part is also easy to be damaged.

[0005] Meanwhile, existing half-type pipe repair fittings, because their sealing gaskets do not provide a true double seal, can only use graded seals, meaning the compression of the arc edges at both ends of the gasket is equal. Consequently, the equal compression of the rubber gasket on both sides only applies to pipes of a certain diameter, thus limiting its adaptability. When the pipe diameter has negative tolerances, the entire sealing gasket must be thickened, increasing installation difficulty and placing higher pressure requirements on the pipe and the repair fitting housing. This also increases the overall compression deformation of the sealing gasket, making it prone to aging and accelerating performance degradation. Summary of the Invention

[0006] The purpose of this invention is to provide a double-stage sealing gasket structure for a pipe repair device, thereby solving the following technical problems:

[0007] How to prevent the service life of the gasket in the repair kit from being shortened when the pipe diameter has negative tolerances.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] This utility model discloses a double-stage sealing gasket structure for a pipe repair device, including an upper shell, a lower shell, and sealing gaskets. The sealing gaskets are provided in two sets, with each set positioned on the inner wall of the upper and lower shells respectively. Each sealing gasket includes two sets of parallel, corresponding straight edge segments, two sets of outer arc edge segments, and two sets of inner arc edge segments connecting the two sets. The two sets of outer arc edge segments are located at both ends of the two sets of straight edge segments, and the two sets of inner arc edge segments are located inside the two sets of outer arc edge segments without contacting them. The inner radius of each inner arc edge segment is larger than the inner radius of the outer arc edge segments.

[0010] In each set of sealing gaskets, two straight edge segments of the gasket body are respectively connected to cylindrical straight edge segments on their sides that are close to each other. The cylindrical straight edge segments are located at the edge of the sealing side of the straight edge segment of the gasket body.

[0011] In a further embodiment of this utility model: multiple ring strips are provided on the inner side of both the inner arc segment and the outer arc segment.

[0012] In a further embodiment of this invention, the thickness of the ring gradually decreases in the inward direction.

[0013] In a further embodiment of this utility model: the upper housing of the pipe repairer includes two sets of parallel and corresponding upper straight edge sections and an upper arc edge section connecting the two, wherein a set of sealing gaskets is disposed on the inner side of the upper arc edge section.

[0014] In a further embodiment of this utility model: the upper arc edge segment is provided with an upper straight edge receiving groove on the inner side of the edge of the two sets of upper straight edge segments respectively, and the upper arc edge segment is provided with two sets of upper arc edge receiving grooves on the inner side of the edge adjacent to the two sets of upper straight edge receiving grooves. Among them, the two sets of gasket straight edge segments in one set of sealing gaskets are respectively embedded in the two sets of upper straight edge receiving grooves, and the two sets of outer arc edge segments and the two sets of inner arc edge segments are respectively embedded in the four sets of upper arc edge receiving grooves.

[0015] In a further embodiment of this utility model: the lower housing of the pipe repairer includes two sets of parallel and corresponding lower straight edge sections and a lower arc edge section connecting the two, the two lower straight edge sections respectively correspond to the two upper straight edge sections, and another set of sealing gaskets is disposed on the inner side of the lower arc edge section.

[0016] In a further embodiment of this utility model: the lower arc-shaped edge segment is provided with a lower straight edge receiving groove on the inner side of the edge of the two sets of lower straight edge segments respectively; the lower arc-shaped edge segment is provided with two sets of lower arc-shaped edge receiving grooves on the inner side of the edge adjacent to the two sets of lower straight edge receiving grooves; and the two sets of gasket straight edge segments in the other set of sealing gaskets are respectively embedded in the two sets of lower straight edge receiving grooves, the two sets of outer arc-shaped edge segments and the two sets of inner arc-shaped edge segments are respectively embedded in the four sets of lower arc-shaped edge receiving grooves.

[0017] In a further embodiment of this utility model, a pressure relief hole is provided on the upper arc-shaped section.

[0018] In a further embodiment of this utility model: multiple upper mounting holes are respectively provided on the two upper straight edge segments, and lower mounting holes corresponding one-to-one with the multiple upper mounting holes are respectively provided on the two lower straight edge segments.

[0019] In a further embodiment of this invention, the corresponding upper mounting hole and lower mounting hole are detachably connected by a bolt assembly.

[0020] The beneficial effects of this utility model are:

[0021] 1. When using the double-stage sealing gasket structure of the pipe repair device of this utility model, during the process of mutual compression of the two sets of sealing gaskets, the straight edge sections of the gasket bodies of the two sets of sealing gaskets are mutually compressed, and the outer arc edge sections and inner arc edge sections of the two sets of sealing gaskets are compressed against the pipe wall, thereby producing a seal under the combined action of the straight edge sections, outer arc edge sections, and inner arc edge sections of the gasket body; since the inner ring radius of the inner arc edge section is larger than the inner ring radius of the outer arc edge section, during the compression process, the outer arc edge section first compresses against the pipe to achieve a seal, and as the compression proceeds, the inner arc edge section is also compressed to produce a seal. The compression amounts of the outer arc edge section and the inner arc edge section are different, and the compression amount of the outer arc edge section is always greater than the compression amount of the inner arc edge section. Therefore, the seal produced by the two is a staged seal, that is, a double-stage sealing is achieved.

[0022] 2. The advantages of dual-stage sealing are that the inner ring radius of the inner arc gasket is set to meet the sealing requirements of the standard pipe outer diameter, while the inner ring radius of the outer arc gasket is set to meet the sealing requirements of the pipe outer diameter with negative tolerance. When the pipe diameter becomes smaller due to negative tolerance, the outer arc segment is suitable for the pipe because its inner ring radius is smaller, i.e., its thickness is greater. Furthermore, the narrower width of the outer arc segment facilitates compression, improving installation convenience and reducing the pressure requirements of the pipe and its upper and lower shells. Simultaneously, for standard pipes, the outer arc segment may be over-compressed while the inner arc segment is normally compressed. If the outer arc segment experiences performance degradation due to over-compression, the inner arc gasket retains its normal compression capacity and performance. Therefore, the overall compression of the gasket is improved, meaning the overall internal stress of both the outer and inner arc segments is improved. This prevents a sharp reduction in the gasket's sealing performance and extends its service life.

[0023] 3. When using the double-stage sealing gasket structure of the pipe repairer of this utility model, during the process of the two sets of sealing gaskets being pressed and adhered to each other, the straight edge sections of the gasket bodies of the two sets of sealing gaskets are pressed and adhered to each other. At this time, the cylindrical straight edge sections on the two straight edge sections of the gasket bodies will come into contact, causing the cylindrical straight edge sections to roll inward along the connection with the straight edge sections of the gasket bodies, so that the two cylindrical straight edge sections are also sealed and adhered. When the sealing between the two straight edge sections of the gasket bodies fails, the gap between the two straight edge sections of the gasket bodies increases. At this time, the two cylindrical straight edge sections will roll outward due to elastic rolling, still maintaining the adhered state, which can maintain the sealing performance and make the sealing gasket structure more effective. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 is a schematic diagram of the double-stage sealing gasket structure of the pipe repair device of this utility model;

[0026] Figure 2 is an exploded view of the double-stage sealing gasket structure of the pipe repair device of this utility model;

[0027] Figure 3 is a schematic diagram of the upper shell of the pipe repairer in the double-stage sealing gasket structure of the pipe repairer of this utility model;

[0028] Figure 4 is a schematic diagram of the upper shell of the pipe repairer in the double-stage sealing gasket structure of the pipe repairer of this utility model, which is different from the angle shown in Figure 3.

[0029] Figure 5 is a schematic diagram of the lower shell of the pipe repairer in the double-stage sealing gasket structure of the pipe repairer of this utility model;

[0030] Figure 6 is a side view of the double-stage sealing gasket structure of the pipe repair device of this utility model;

[0031] Figure 7 is a schematic diagram of the sealing gasket structure in the double-stage sealing gasket structure of the pipe repairer of this utility model;

[0032] Figure 8 is an enlarged structural diagram of A in Figure 7;

[0033] Figure 9 is a schematic diagram of the installation structure of the sealing gasket in the inner side of the lower shell of the pipe repairer in the double-stage sealing gasket structure of the pipe repairer of this utility model.

[0034] Figure 10 is a cross-sectional view of the double-stage sealing gasket structure of the pipe repair device of this utility model.

[0035] In the diagram: 100, upper shell of the pipe repair kit; 101, upper straight edge section; 102, upper curved edge section; 103, pressure relief hole; 104, upper mounting hole; 105, upper straight edge receiving groove; 106, upper curved edge receiving groove; 200, lower shell of the pipe repair kit; 201, lower straight edge section; 202, lower curved edge section; 203, lower mounting hole; 204, lower straight edge receiving groove; 205, lower curved edge receiving groove; 300, sealing gasket; 301, gasket body straight edge section; 302, outer curved edge section; 303, inner curved edge section; 304, cylindrical straight edge section; 400, pipe. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0037] Please refer to Figures 1-2. This utility model discloses a double-stage sealing gasket structure for a pipe repair device, including an upper shell 100 and a lower shell 200. The two shells are joined together to form a complete tubular repair device shell, which is used to fit onto the pipe 400. Sealing gaskets 300 are provided on the inner walls of both the upper shell 100 and the lower shell 200 to seal the pipe 400.

[0038] Please refer to Figure 2-4. The upper housing 100 of the pipe repair device includes two sets of parallel and corresponding upper straight edge sections 101, with their ends corresponding to each other. An upper arc edge section 102 connects the two sets of upper straight edge sections 101. The cross-section of the upper arc edge section 102 is semi-circular. A pressure relief hole 103 is installed in the middle of the upper arc edge section 102, extending outward from the upper arc edge section 102. A groove is provided on the inner edge of each upper arc edge section 102. Upper straight edge receiving grooves 105 are provided on both sides near the two sets of upper straight edge sections 101, and two sets of upper arc edge receiving grooves 106 are provided on the inner side of the edges adjacent to the two sets of upper straight edge receiving grooves 105. Three sets of upper mounting holes 104 are provided on each of the two sets of upper straight edge sections 101 for connection with the lower housing 200 of the pipe repair device.

[0039] Please refer to Figure 5. The structure of the lower housing 200 of the pipe repair device is similar to that of the upper housing 100, the only difference being that it does not include the pressure relief hole 103. Specifically, the lower housing 200 of the pipe repair device includes two sets of parallel and corresponding lower straight edge sections 201, with their ends corresponding to each other. A lower arc edge section 202 connects the two sets of lower straight edge sections 201. The cross-section of the lower arc edge section 202 is semi-circular, thus forming a complete circular tubular cross-section with the upper arc edge section 102, which also has a semi-circular cross-section. A slot is provided on the inner edge of each lower arc edge section 202. A lower straight edge receiving groove 204 is provided on each side edge near the two sets of lower straight edge sections 201, and two sets of lower arc edge receiving grooves 205 are provided on the inner side of the edges adjacent to the two sets of lower straight edge receiving grooves 204.

[0040] Please refer to Figure 6. Three sets of lower mounting holes 203 are provided on each of the two sets of lower straight edge sections 201. Each lower mounting hole 203 corresponds one-to-one with an upper mounting hole 104, which encloses the upper housing 100 and the lower housing 200 of the pipe repairer. The two sets of upper straight edge sections 101 in the upper housing 100 correspond to the two sets of lower straight edge sections 201 in the lower housing 200, respectively. The corresponding upper mounting holes 104 and lower mounting holes 203 can be connected to form screw holes. By installing bolt assemblies in the screw holes, the upper straight edge section 101 and the lower straight edge section 201 can be detachably connected, thereby realizing the detachable connection between the upper housing 100 and the lower housing 200 of the pipe repairer.

[0041] Please refer to Figures 7-8. Sealing gaskets 300 are respectively provided on the inner walls of the upper housing 100 and the lower housing 200 of the pipe repair device. The installation method of the two sets of sealing gaskets 300 on the inner walls of the upper housing 100 and the lower housing 200 of the pipe repair device is exactly the same. Each set of sealing gaskets 300 includes two sets of parallel and corresponding straight edge segments 301. The length of the two sets of straight edge segments 301 is the same as the length of the upper housing 100 and the lower housing 200 of the pipe repair device, and the beginning and end positions of the two sets of straight edge segments 301 correspond to each other, forming a set of straight edge segment combinations. Two sets of outer arc segments 302 and two sets of inner arc segments 303 are connected between the two sets of straight edge segments 301 of the pad body. Both the outer arc segments 302 and the inner arc segments 303 are semi-circular arcs. The two sets of outer arc segments 302 are respectively set at both ends of the straight edge segment combination. The two sets of inner arc segments 303 are respectively set inside the two sets of outer arc segments 302 and do not contact the outer arc segments 302. The inner ring radius of the inner arc segment 303 is larger than the inner ring radius of the outer arc segment 302.

[0042] In each set of sealing gaskets 300, two straight edge segments 301 of the gasket body are respectively connected to cylindrical straight edge segments 304 on the side that are close to each other. The cylindrical straight edge segments 304 are located at the edge of the sealing side of the straight edge segment 301 of the gasket body.

[0043] Furthermore, multiple rings are provided on the inner side of both the inner arc segment 303 and the outer arc segment 302, which can enhance the friction between the inner arc segment 303 and the outer arc segment 302 and the pipe 400, and further enhance its sealing performance; the thickness of each ring gradually decreases in the direction towards the inside, which can enhance the compressibility of the ring.

[0044] Please refer to Figures 9-10. For the sealing gasket 300 installed on the inner wall of the upper housing 100 of the pipe repair kit, the two sets of straight edge segments 301 of the sealing gasket 300 are respectively embedded in the two sets of upper straight edge receiving grooves 105, and the two sets of outer arc edge segments 302 and the two sets of inner arc edge segments 303 are respectively embedded in the four sets of upper arc edge receiving grooves 106. For the sealing gasket 300 installed on the inner wall of the lower housing 200 of the pipe repair kit, the two sets of straight edge segments 301 of the sealing gasket 300 are respectively embedded in the two sets of lower straight edge receiving grooves 204, and the two sets of outer arc edge segments 302 and the two sets of inner arc edge segments 303 are respectively embedded in the four sets of lower arc edge receiving grooves 205. This embedded installation can enhance the snap-fit ​​tightness between the sealing gasket 300 and the upper and lower housings, improve its installation firmness, and prevent the sealing gasket 300 from falling off and shifting during the transportation and installation of the repair kit, thereby improving the reliability of the product.

[0045] The working principle of this utility model:

[0046] When using the double-stage sealing gasket structure of the pipe repairer of this utility model, firstly, the upper shell 100 and the lower shell 200 of the pipe repairer are surrounded on the outside of the pipe to be repaired, so that the two sets of upper straight edge sections 101 in the upper shell 100 correspond to the two sets of lower straight edge sections 201 in the lower shell 200 respectively. At the same time, the pressure relief hole 103 of the upper shell 100 corresponds to the damaged part of the pipe, and the corresponding upper mounting hole 104 and lower mounting hole 203 are connected to form a screw hole. A bolt assembly is installed in the screw hole to connect and fix the upper shell 100 and the lower shell 200 of the pipe repairer. During this process, the two sets of sealing gaskets 300 on the inner side of the upper shell 100 and the lower shell 200 of the pipe repairer are pressed together, thereby achieving a seal on the pipe 400.

[0047] Specifically, during the compression process of the two sets of sealing gaskets 300, the straight edge sections 301 of the gasket bodies of the two sets of sealing gaskets 300 are compressed against each other, and the outer arc edge sections 302 and inner arc edge sections 303 of the two sets of sealing gaskets 300 are compressed against the pipe wall of the pipe 400. Thus, a seal is generated under the combined action of the straight edge sections 301, outer arc edge sections 302, and inner arc edge sections 303. Because the inner ring radius of the inner arc edge section 303 is larger than the inner ring radius of the outer arc edge section 302, during the compression process, the outer arc edge section 302 first contacts the pipe 400. Compression achieves sealing. As compression proceeds, the inner arc segment 303 is also compressed, creating a seal. The compression amounts of the outer arc segment 302 and the inner arc segment 303 are different. The compression amount of the outer arc segment 302 is always greater than that of the inner arc segment 303. Therefore, the seal produced by the two is a graded seal, which achieves a double-stage graded seal. The sum of the widths of the outer arc segment 302 and the inner arc gasket 303 is the same as the existing single arc edge width. In other words, the widths of the outer arc segment 302 and the inner arc gasket 303 are reduced and narrowed compared to the existing single arc edge width.

[0048] The advantage of dual-stage sealing is that the inner ring radius of the inner arc gasket 303 is set to meet the sealing requirements of the standard pipe outer diameter, while the inner ring radius of the outer arc gasket 302 is set to meet the sealing requirements of the pipe outer diameter with negative tolerance. When the pipe diameter of the pipe 500 becomes smaller due to negative tolerance, the outer arc segment 302, with its smaller inner ring radius (i.e., greater thickness), is suitable for the pipe 500. Furthermore, the narrower width of the outer arc segment 302 facilitates compression, improving installation convenience and reducing the pressure requirements of the pipe 500. Simultaneously, for standard pipes, if the outer arc segment 302 experiences performance degradation due to excessive compression, the inner arc gasket 303 retains its normal compression capacity and performance. Therefore, the overall compression of the gasket 300 is improved, meaning the overall internal stress of the outer arc segment 302 and the inner arc segment 303 is improved. This prevents a sharp reduction in the sealing performance of the gasket 300 and extends its service life.

[0049] Simultaneously, during the mutual compression of the two sets of sealing gaskets 300, the straight edge segments 301 of the gasket bodies of the two sets of sealing gaskets 300 are mutually compressed and adhered to each other. At this time, the cylindrical straight edge segments 304 on the two mating straight edge segments 301 will come into contact, causing the cylindrical straight edge segments 304 to roll inward along the connection with the straight edge segments 301 of the gasket bodies, so that the two cylindrical straight edge segments 304 also seal and adhere. When the seal between the two straight edge segments 301 of the gasket bodies fails, the gap between the two straight edge segments 301 of the gasket bodies becomes larger. At this time, the two cylindrical straight edge segments 304 roll outward due to elastic rolling, still maintaining the mating state, which can maintain the seal and make the sealing effect of the sealing gaskets 300 better.

[0050] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A double-stage sealing gasket structure for a pipe repair device, characterized in that, The device includes an upper housing (100), a lower housing (200), and a sealing gasket (300). Two sets of sealing gaskets (300) are provided, with each set disposed on the inner wall of the upper housing (100) and the lower housing (200), respectively. The sealing gasket (300) comprises two sets of parallel, corresponding straight edge segments (301), and two sets of outer arc edge segments (302) and two sets of inner arc edge segments (303) connecting the two. The two sets of outer arc edge segments (302) are respectively... The two sets of straight edge segments (301) of the two gaskets are disposed at both ends. The two sets of inner arc segments (303) are respectively disposed inside the two sets of outer arc segments (302) and do not contact the outer arc segments (302). The inner ring radius of the inner arc segment (303) is larger than the inner ring radius of the outer arc segment (302). In each set of sealing gaskets (300), the two gasket straight edge segments (301) that are close to each other are respectively connected to a cylindrical straight edge segment (304). The cylindrical straight edge segment (304) is located at the edge of the sealing side of the gasket straight edge segment (301).

2. The double-stage sealing gasket structure of the pipe repair device according to claim 1, characterized in that, The inner arc segment (303) and the outer arc segment (302) are both provided with multiple ring strips on their inner sides.

3. The double-stage sealing gasket structure of the pipe repair device according to claim 2, characterized in that, The thickness of the ring gradually decreases in the inward direction.

4. The double-stage sealing gasket structure of the pipe repair device according to claim 1, characterized in that, The upper housing (100) of the pipe repairer includes two sets of parallel and corresponding upper straight edge sections (101) and an upper arc edge section (102) connected between the two, wherein a set of sealing gaskets (300) is disposed on the inner side of the upper arc edge section (102).

5. The double-stage sealing gasket structure of the pipe repair device according to claim 4, characterized in that, The upper arc edge segment (102) is provided with upper straight edge receiving grooves (105) on the inner side of the edge of the two sets of upper straight edge segments (101). The upper arc edge segment (102) and the two sets of upper straight edge receiving grooves (105) are each provided with two sets of upper arc edge receiving grooves (106) on the inner side of the edge of the upper arc edge segment (102) and the two sets of upper straight edge receiving grooves (105). The two sets of gasket straight edge segments (301) in one set of sealing gasket (300) are respectively embedded in the two sets of upper straight edge receiving grooves (105), and the two sets of outer arc edge segments (302) and the two sets of inner arc edge segments (303) are respectively embedded in the four sets of upper arc edge receiving grooves (106).

6. The double-stage sealing gasket structure of the pipe repair device according to claim 4, characterized in that, The lower housing (200) of the pipe repairer includes two sets of parallel and corresponding lower straight edge sections (201) and a lower arc edge section (202) connecting the two. The two lower straight edge sections (201) correspond to the two upper straight edge sections (101) respectively. Another set of sealing gaskets (300) is disposed inside the lower arc edge section (202).

7. The double-stage sealing gasket structure of the pipe repair device according to claim 6, characterized in that, The lower arc edge segment (202) is provided with a lower straight edge receiving groove (204) on the inner side of the edge of the two lower straight edge segments (201). The lower arc edge segment (202) is provided with two lower arc edge receiving grooves (205) on the inner side of the edge adjacent to the two lower straight edge receiving grooves (204). The two sets of gasket straight edge segments (301) in the other set of sealing gaskets (300) are respectively embedded in the two sets of lower straight edge receiving grooves (204), the two sets of outer arc edge segments (302) and the two sets of inner arc edge segments (303) are respectively embedded in the four sets of lower arc edge receiving grooves (205).

8. The double-stage sealing gasket structure of the pipe repair device according to claim 4, characterized in that, A pressure relief hole (103) is provided on the upper arc-shaped section (102).

9. The double-stage sealing gasket structure of the pipe repair device according to claim 6, characterized in that, The two upper straight edge sections (101) are provided with a plurality of upper mounting holes (104), and the two lower straight edge sections (201) are provided with lower mounting holes (203) that correspond one-to-one with the plurality of upper mounting holes (104).

10. The double-stage sealing gasket structure of the pipe repair device according to claim 9, characterized in that, The corresponding upper mounting hole (104) and lower mounting hole (203) are detachably connected by bolt assembly.

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