A double-pass graded sealing gasket structure for a pipeline repairer

Abstract

The invention discloses a double-channel graded sealing gasket structure of a pipeline repairer, which relates to the technical field of pipeline repairers and comprises an upper shell body of the pipeline repairer, a lower shell body of the pipeline repairer and a sealing gasket. The sealing gasket is provided with two groups, and the two sealing gaskets are respectively arranged on the inner walls of the upper shell body and the lower shell body; the sealing gasket comprises two groups of straight edge sections of the pad body which are arranged in parallel and correspondingly, and two groups of outer arc edge sections and two groups of inner arc edge sections which are connected therebetween, the two groups of outer arc edge sections are respectively arranged at the two ends of the two groups of straight edge sections of the pad body, the two groups of inner arc edge sections are respectively arranged on the inner sides of the two groups of outer arc edge sections and do not contact 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 a negative tolerance, the outer arc edge section and the inner arc edge section do not need to be over-compressed at the same time, that is, the overall internal stress of the outer arc edge section and the inner arc edge section is improved, so that the sealing performance of the sealing gasket can be avoided from being sharply reduced, and the service life of the sealing gasket can be extended.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline repairers, and in particular to a double-channel graded sealing gasket structure of a pipeline repairer. Background Art

[0002] In the field of rapid repair of urban fluid delivery pipelines, especially in the field of rapid repair of urban water supply pipelines, pipeline repairers have played a huge role. Among them, most pipeline repairers are of the Hough type, and their main components are the upper and lower shells and the upper and lower sealing rubber pads.

[0003] The existing half-structure pipe repairer, as a rubber pad of the sealing component, is composed of a straight edge section and an arc edge section. When the upper and lower shells are combined with the rubber pad and installed on the pipe, the straight edge sections of the upper and lower rubber pads fit each other, and the inner annular surface of the arc edge section fits the pipe, and through compression, a seal is generated together. Most of the arc edge sections are arc-shaped monomer structures. The generally claimed double-channel seal is just an additional groove on the arc-shaped monomer, which is not a true double-channel seal.

[0004] The patent document with publication number CN221221906U discloses a new anti-slip pipe repairer. In this patent, although there are multiple arc-shaped structures in the arc edge section, this is mainly to widen the width of the contact surface with the pipe to adapt to the anti-slip function. The internal stress of the widened part and the integral part under compression is different. It is mainly to increase friction to achieve the anti-slip function, so the widened part is also easy to be damaged.

[0005] At the same time, the existing half-structure pipeline repairer has two ends of the gasket, which is not a true double-pass seal. Therefore, it can only use graded sealing, that is, the arc edge compression at both ends of the gasket is equal. Correspondingly, the compression of the rubber pad is equal on both sides, which can only adapt to pipes of a certain diameter. Therefore, the adaptability to the pipe diameter is not very strong. When the pipe diameter has a negative tolerance, the gasket can only be thickened as a whole, which will increase the difficulty of installation, and the pressure-bearing requirements for the pipe and the repairer shell are high. The compression deformation of the gasket is increased as a whole, which is prone to aging and the performance decay is faster. Summary of the invention

[0006] The purpose of the present invention is to provide a dual-channel graded sealing gasket structure of a pipeline repairer to solve the following technical problems:

[0007] How to prevent the service life of the gasket in the repair device from being shortened when negative tolerance occurs in the pipe diameter.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] The invention discloses a double-channel graded sealing gasket structure of a pipeline repairer, comprising an upper shell of the pipeline repairer, a lower shell of the pipeline repairer, and a sealing gasket. The sealing gasket is provided with two groups, and the two sealing gaskets are respectively arranged on the inner walls of the upper shell and the lower shell; the sealing gasket comprises two groups of parallel and corresponding straight edge segments of the cushion body, and two groups of outer arc edge segments and two groups of inner arc edge segments connected therebetween, the two groups of outer arc edge segments are respectively arranged at the two ends of the two groups of the straight edge segments of the cushion body, the two groups of inner arc edge segments are respectively arranged on the inner sides of the two groups of the outer arc edge segments and do not contact the outer arc edge segments, and the inner ring radius of the inner arc edge segment is greater than the inner ring radius of the outer arc edge segment.

[0010] In a further embodiment of the present invention, a plurality of ring strips are disposed on the inner sides of the inner arc edge segment and the outer arc edge segment.

[0011] In a further embodiment of the present invention, the thickness of the coil gradually decreases in the direction toward the inside.

[0012] In a further embodiment of the present invention, the upper shell of the pipeline repair device includes two sets of upper straight edge sections arranged in parallel and correspondingly and an upper arc edge section connected therebetween, wherein a set of sealing gaskets is arranged on the inner side of the upper arc edge section.

[0013] In a further embodiment of the present invention: upper straight edge accommodating grooves are respectively arranged on the inner sides of the edges of the upper arc edge segments close to the two groups of upper straight edge segments, and two groups of upper arc edge accommodating grooves are respectively arranged on the inner sides of the edges of the upper arc edge segments adjacent to the two groups of upper straight edge accommodating grooves, wherein two groups of pad straight edge segments in one group of the sealing pads are respectively embedded in the two groups of upper straight edge accommodating grooves, and two groups of outer arc edge segments and two groups of inner arc edge segments are respectively embedded in the four groups of upper arc edge accommodating grooves.

[0014] In a further embodiment of the present invention: the lower shell of the pipeline repair device includes two groups of lower straight edge sections arranged in parallel and correspondingly and a lower arc edge section connected therebetween, the two lower straight edge sections respectively correspond to the two upper straight edge sections, and another group of sealing gaskets are arranged on the inner side of the lower arc edge section.

[0015] In a further solution of the present invention: lower straight edge accommodating grooves are respectively provided on the inner sides of the edges of the lower arc edge segments close to the two groups of lower straight edge segments, two groups of lower arc edge accommodating grooves are respectively provided on the inner sides of the edges of the lower arc edge segments adjacent to the two groups of lower straight edge accommodating grooves, and two groups of pad straight edge segments in another group of the sealing pads are respectively embedded in the two groups of lower straight edge accommodating grooves, and two groups of outer arc edge segments and two groups of inner arc edge segments are respectively embedded in the four groups of lower arc edge accommodating grooves.

[0016] In a further embodiment of the present invention, a pressure relief hole is provided on the upper arc edge segment.

[0017] In a further embodiment of the present invention: a plurality of upper mounting holes are respectively formed on the two upper straight side sections, and a plurality of lower mounting holes corresponding to the plurality of upper mounting holes are respectively formed on the two lower straight side sections.

[0018] In a further embodiment of the present invention, the corresponding upper mounting holes and lower mounting holes are detachably connected via a bolt assembly.

[0019] Beneficial effects of the present invention:

[0020] 1. When using the double-pass graded sealing gasket structure of the pipeline repair device of the present invention, in the process of the two groups of sealing gaskets being fitted and compressed against each other, the straight edge sections of the gasket bodies of the two groups of sealing gaskets are fitted and compressed against each other, and the outer arc edge sections and inner arc edge sections of the two groups of sealing gaskets are fitted and compressed against the pipe wall of the pipe, so that a seal is generated under the joint action of the straight edge sections of the gasket body, the outer arc edge sections and the inner arc edge sections; 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 is first fitted and compressed against the pipe to achieve a seal, and as the compression proceeds, the inner arc edge section is also compressed to achieve a seal, and 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 larger than the compression amount of the inner arc edge section, so the seal generated by the two is a graded seal, that is, a double-pass graded seal is achieved.

[0021] 2. The advantage of double-channel graded sealing is that the inner ring radius of the inner arc edge gasket is set to meet the sealing requirements of the standard pipe outer diameter, and the inner ring radius of the outer arc edge gasket is set to meet the sealing requirements of the negative tolerance pipe outer diameter. When the pipe diameter becomes smaller due to negative tolerance, the outer arc edge segment is suitable for the pipe because of its smaller inner ring radius, that is, its larger thickness, and the reduced width of the outer arc edge segment is conducive to compression, which can improve the convenience of installation and reduce the pressure requirements of the pipe and the upper and lower shells; at the same time, if the performance of the outer arc edge segment declines due to excessive compression, the inner arc edge gasket on its inside still retains normal compression and compression performance; therefore, the overall compression of the gasket can be improved, that is, the overall internal stress of the outer arc edge segment and the inner arc edge segment is improved, thereby avoiding a sharp reduction in the sealing performance of the gasket and extending the service life of the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 It is a structural schematic diagram of a double-channel graded sealing gasket structure of a pipeline repairer of the present invention;

[0024] Figure 2 is an exploded view of a double-pass graded sealing gasket structure of a pipeline repair device of the present invention;

[0025] Figure 3It is a structural schematic diagram of an upper housing of a pipeline repair device in a double-channel graded sealing gasket structure of a pipeline repair device of the present invention;

[0026] Figure 4 The upper shell of the pipeline repair device in the double-channel graded sealing gasket structure of the pipeline repair device of the present invention is different from Figure 3 Schematic diagram of the structure of the angle;

[0027] Figure 5 It is a structural schematic diagram of the lower shell of the pipeline repair device in the double-channel graded sealing gasket structure of the pipeline repair device of the present invention;

[0028] Figure 6 is a side view of a double-channel graded sealing gasket structure of a pipeline repair device of the present invention;

[0029] Figure 7 It is a structural schematic diagram of a sealing gasket in a double-channel graded sealing gasket structure of a pipeline repairer of the present invention;

[0030] Figure 8 yes Figure 7 A is a schematic diagram of the enlarged structure of the middle part;

[0031] Fig. 9 It is a schematic diagram of the installation structure of the sealing gasket in the double-channel graded sealing gasket structure of the pipeline repair device of the present invention on the inner side of the lower shell of the pipeline repair device;

[0032] Fig.10 It is a cross-sectional view of the double-channel graded sealing gasket structure of the pipeline repair device of the present invention.

[0033] In the figure: 100, upper shell of pipeline repair device; 101, upper straight edge section; 102, upper arc edge section; 103, pressure relief hole; 104, upper mounting hole; 105, upper straight edge receiving groove; 106, upper arc edge receiving groove; 200, lower shell of pipeline repair device; 201, lower straight edge section; 202, lower arc edge section; 203, lower mounting hole; 204, lower straight edge receiving groove; 205, lower arc edge receiving groove; 300, sealing gasket; 301, gasket body straight edge section; 302, outer arc edge section; 303, inner arc edge section; 400, pipeline. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-2The present invention discloses a double-channel graded sealing gasket structure of a pipeline repairer, including an upper shell 100 of the pipeline repairer and a lower shell 200 of the pipeline repairer. The two can be enclosed as a whole to form a complete tubular repairer shell for sleeved on a pipeline 400; sealing gaskets 300 are arranged on the inner walls of the upper shell 100 of the pipeline repairer and the lower shell 200 of the pipeline repairer to seal the pipeline 400.

[0036] See also Figure 2-4 The upper housing 100 of the pipeline repair device includes two groups of upper straight edge sections 101 arranged in parallel and correspondingly, the two groups of upper straight edge sections 101 correspond to each other at their ends, an upper arc edge section 102 is connected between the two groups of upper straight edge sections 101, the cross section of the upper arc edge section 102 is semicircular, a pressure relief hole 103 is installed in the middle position of the upper arc edge section 102, and the pressure relief hole 103 extends to the outside of the upper arc edge section 102; a clamping groove is arranged at the inner edge of the upper arc edge section 102, wherein upper straight edge receiving grooves 105 are respectively arranged at the two side edges close to the two groups of upper straight edge sections 101, and two groups of upper arc edge receiving grooves 106 are arranged on the inner side of the edges adjacent to the two groups of upper straight edge receiving grooves 105. Three groups of upper mounting holes 104 are arranged on the two groups of upper straight edge sections 101 for connecting with the lower housing 200 of the pipeline repair device.

[0037] See also Figure 5 The structure of the lower shell 200 of the pipeline repair device is similar to that of the upper shell 100 of the pipeline repair device, except that the pressure relief hole 103 is not included; specifically, the lower shell 200 of the pipeline repair device includes two groups of lower straight edge sections 201 arranged in parallel and correspondingly, the two groups of lower straight edge sections 201 correspond to each other at the head and tail, and a lower arc edge section 202 is connected between the two groups of lower straight edge sections 201, and the cross section of the lower arc edge section 202 is semicircular, so it can be enclosed with the upper arc edge section 102, which also has a semicircular cross section, to form a complete circular tubular cross section. A clamping groove is provided at the inner edge of the lower arc edge section 202, wherein lower straight edge receiving grooves 204 are respectively provided at the two side edges close to the two groups of lower straight edge sections 201, and two groups of lower arc edge receiving grooves 205 are provided on the inner side of the edges adjacent to the two groups of lower straight edge receiving grooves 204.

[0038] See also Figure 6Three groups of lower mounting holes 203 are arranged on the two groups of lower straight edge sections 201, and each lower mounting hole 203 corresponds to an upper mounting hole 104 one by one. The upper shell 100 of the pipeline repair device is enclosed with the lower shell 200 of the pipeline repair device, so that the two groups of upper straight edge sections 101 in the upper shell 100 of the pipeline repair device correspond to the two groups of lower straight edge sections 201 in the lower shell 200 of the pipeline repair device, respectively, so that each group of 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 shell 100 of the pipeline repair device and the lower shell 200 of the pipeline repair device.

[0039] See also Figure 7-8 The inner walls of the upper shell 100 and the lower shell 200 of the pipeline repair device are respectively provided with sealing gaskets 300. The installation methods of the two groups of sealing gaskets 300 on the inner walls of the upper shell 100 and the lower shell 200 of the pipeline repair device are exactly the same; each group of sealing gaskets 300 includes two groups of parallel and correspondingly arranged gasket body straight edge sections 301. The lengths of the two groups of gasket body straight edge sections 301 are the same as those of the upper shell 100 and the lower shell 200 of the pipeline repair device, and the head and tail positions of the two groups of gasket body straight edge sections 301 correspond to each other, forming a group of straight edge section combinations. Two groups of outer arc edge segments 302 and two groups of inner arc edge segments 303 are connected between the two groups of straight edge segments 301 of the pad body. The outer arc edge segments 302 and the inner arc edge segments 303 are both semicircular arc-shaped. The two groups of outer arc edge segments 302 are respectively arranged at the two ends of the straight edge segment combination, and the two groups of inner arc edge segments 303 are respectively arranged on the inner sides of the two groups of outer arc edge segments 302 and do not contact the outer arc edge segments 302. The inner ring radius of the inner arc edge segment 303 is greater than the inner ring radius of the outer arc edge segment 302.

[0040] Furthermore, multiple strips are provided on the inner side of the inner arc edge segment 303 and the outer arc edge segment 302, which can enhance the friction between the inner arc edge segment 303, the outer arc edge segment 302 and the pipe 400, and further enhance its sealing performance; the thickness of each strip gradually decreases in the direction toward the inside, which can enhance the compressibility of the strip.

[0041] See also Figure 9-10For the sealing gasket 300 installed on the inner wall of the upper shell 100 of the pipeline repair device, the two groups of straight edge segments 301 of the sealing gasket 300 are respectively embedded in the two groups of upper straight edge receiving grooves 105, and the two groups of outer arc edge segments 302 and the two groups of inner arc edge segments 303 are respectively embedded in the four groups of upper arc edge receiving grooves 106; for the sealing gasket 300 installed on the inner wall of the lower shell 200 of the pipeline repair device, the two groups of straight edge segments 301 of the sealing gasket 300 are respectively embedded in the two groups of lower straight edge receiving grooves 204, and the two groups of outer arc edge segments 302 and the two groups of inner arc edge segments 303 are respectively embedded in the four groups 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 shells, improve its installation firmness, and prevent the sealing gasket 300 from falling off and shifting during the transportation and installation of the repair device, thereby improving the reliability of the product.

[0042] Working principle of the present invention:

[0043] When using the dual-channel graded sealing gasket structure of the pipeline repair device of the present invention, firstly, the upper shell 100 of the pipeline repair device and the lower shell 200 of the pipeline repair device are enclosed outside the pipeline to be repaired, so that the two groups of upper straight edge sections 101 in the upper shell 100 of the pipeline repair device correspond to the two groups of lower straight edge sections 201 in the lower shell 200 of the pipeline repair device respectively, and at the same time, the pressure relief hole 103 of the upper shell 100 of the pipeline repair device corresponds to the damaged part of the pipeline, and the corresponding upper mounting hole 104 and the lower mounting hole 203 are correspondingly penetrated into screw holes, and bolt assemblies are installed in the screw holes to connect and fix the upper shell 100 of the pipeline repair device and the lower shell 200 of the pipeline repair device. In this process, the two groups of sealing gaskets 300 on the inner sides of the upper shell 100 of the pipeline repair device and the lower shell 200 of the pipeline repair device are fitted and compressed, so as to achieve sealing of the pipeline 400.

[0044] Specifically, during the process of the two groups of sealing gaskets 300 being pressed together, the straight edge sections 301 of the two groups of sealing gaskets 300 are pressed together, and the outer arc edge sections 302 and the inner arc edge sections 303 of the two groups of sealing gaskets 300 are pressed together against the pipe wall of the pipe 400, so that a seal is generated under the joint action of the straight edge sections 301, the outer arc edge sections 302 and the inner arc edge sections 303 of the gasket body; since the inner ring radius of the inner arc edge section 303 is greater than the inner ring radius of the outer arc edge section 302, during the compression process, the outer arc edge section 302 is pressed against the pipe 400 first, and then the outer arc edge section 302 is pressed against the pipe 400. The combined compression realizes sealing. As the compression proceeds, the inner arc edge segment 303 is also compressed to produce a seal. The compression amount of the outer arc edge segment 302 and the inner arc edge segment 303 is different. The compression amount of the outer arc edge segment 302 is always greater than the compression amount of the inner arc edge segment 303. Therefore, the seal produced by the two is a graded seal, that is, a double-channel graded seal is achieved; the sum of the widths of the outer arc edge segment 302 and the inner arc edge pad 303 is the same as the existing single-channel arc edge width, that is, the widths of the outer arc edge segment 302 and the inner arc edge pad 303 are reduced and narrowed compared to the existing single-channel arc edge width.

[0045] The advantage of double-channel graded sealing is that the inner ring radius of the inner arc edge gasket 303 is set to meet the sealing requirements of the standard pipe outer diameter, and the inner ring radius of the outer arc edge gasket 302 is set to meet the sealing requirements of the negative tolerance pipe outer diameter. When the pipe diameter of the pipe 500 becomes smaller due to a negative tolerance, the outer arc edge segment 302 is suitable for the pipe 500 due to its smaller inner ring radius, that is, its larger thickness, and the reduced width of the outer arc edge segment 302 is conducive to compression, which can improve the convenience of installation and reduce the pressure-bearing requirements of the pipe 500; at the same time, if the performance of the outer arc edge segment 302 declines due to excessive compression, the inner arc edge gasket 303 on its inner side still retains normal compression and compression performance; therefore, the overall compression of the gasket 300 can be improved, that is, the overall internal stress of the outer arc edge segment 302 and the inner arc edge segment 303 is improved, thereby avoiding a sharp reduction in the sealing performance of the gasket 300 and extending the service life of the gasket 300.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions 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 device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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.

[0048] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A dual-pass graded sealing gasket structure for a pipeline repairer, characterized in that: The invention comprises an upper shell (100) of a pipeline repair device, a lower shell (200) of a pipeline repair device, and a sealing gasket (300), wherein the sealing gasket (300) is provided with two groups, and the two sealing gaskets (300) are respectively arranged on the inner walls of the upper shell (100) and the lower shell (200); the sealing gasket (300) is characterized in that the sealing gasket (300) comprises two groups of parallel and corresponding straight edge segments (301) of the gasket body, and two groups of outer arc edge segments (302) and two groups of inner arc edge segments (303) connected therebetween, the two groups of outer arc edge segments (302) are respectively arranged at the two ends of the two groups of straight edge segments (301) of the gasket body, the two groups of inner arc edge segments (303) are respectively arranged on the inner sides of the two groups of outer arc edge segments (302) and do not contact the outer arc edge segments (302), and the inner ring radius of the inner arc edge segment (303) is greater than the inner ring radius of the outer arc edge segment (302).

2. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 1, characterized in that: The inner sides of the inner arc edge section (303) and the outer arc edge section (302) are both provided with a plurality of ring strips.

3. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 2, characterized in that: The thickness of the coil gradually decreases in the direction toward the inside.

4. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 1, characterized in that: The pipeline repair device upper shell (100) comprises two sets of upper straight edge sections (101) arranged in parallel and correspondingly and an upper arc edge section (102) connected therebetween, wherein a set of sealing gaskets (300) is arranged on the inner side of the upper arc edge section (102).

5. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 4, characterized in that: Upper straight edge receiving grooves (105) are respectively arranged on the inner sides of the edges of the upper arc edge segments (102) close to the two groups of upper straight edge segments (101); two groups of upper arc edge receiving grooves (106) are respectively arranged on the inner sides of the edges of the upper arc edge segments (102) adjacent to the two groups of upper straight edge receiving grooves (105); two groups of pad body straight edge segments (301) in one group of the sealing pads (300) are respectively embedded in the two groups of upper straight edge receiving grooves (105); two groups of outer arc edge segments (302) and two groups of inner arc edge segments (303) are respectively embedded in the four groups of upper arc edge receiving grooves (106).

6. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 4, characterized in that: The lower shell (200) of the pipeline repair device comprises two groups of lower straight edge sections (201) arranged in parallel and correspondingly, and a lower arc edge section (202) connected therebetween, the two lower straight edge sections (201) respectively corresponding to the two upper straight edge sections (101), and another group of sealing gaskets (300) is arranged on the inner side of the lower arc edge section (202).

7. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 6, characterized in that: The inner sides of the edges of the lower arc edge sections (202) close to the two groups of lower straight edge sections (201) are respectively provided with lower straight edge receiving grooves (204); the inner sides of the edges of the lower arc edge sections (202) adjacent to the two groups of lower straight edge receiving grooves (204) are respectively provided with two groups of lower arc edge receiving grooves (205); the two groups of pad body straight edge sections (301) in another group of the sealing pads (300) are respectively embedded in the two groups of lower straight edge receiving grooves (204); the two groups of outer arc edge sections (302) and the two groups of inner arc edge sections (303) are respectively embedded in the four groups of lower arc edge receiving grooves (205).

8. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 4, characterized in that: The upper arc edge section (102) is provided with a pressure relief hole (103).

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

10. The double-pass graded sealing gasket structure of the pipeline repair device according to claim 9, characterized in that: The corresponding upper mounting hole (104) and lower mounting hole (203) are detachably connected via a bolt assembly.

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