Pipe segments, casting templates, skeleton nail length adjustment tools, and pipe repair methods applicable to pipe inner wall repair.

Abstract

This invention discloses a pipe segment, a casting template, a tool for adjusting the length of the reinforcing nail, and a pipe repair method. The pipe segment includes a segment body, a central reinforcing nail, and a circumferential connection structure. The segment body is constructed in an arc-shaped plate form. The circumferential connection structure is located at the circumferential end of the segment body and includes a circumferential reinforcing nail perpendicularly fixed to the outer arc surface of the segment body and a circumferential insertion hole perpendicularly penetrating the segment body. The length of the circumferential reinforcing nail is greater than the depth of the circumferential insertion hole, so that when the circumferential reinforcing nail of the segment is inserted into the circumferential insertion hole of an adjacent segment for circumferential connection, the portion of the circumferential reinforcing nail protruding from the circumferential insertion hole supports the inner wall of the existing pipe, forming a grouting space between the outer arc surface of the segment body and the inner wall of the existing pipe. When using the pipe segment of this application for pipe repair, the circumferential reinforcing nail achieves the dual function of connecting adjacent segments and supporting the existing pipe. During construction, workers do not need to install and remove additional segment support components, improving pipe repair efficiency.

Description

Technical Field

[0001] This invention relates to the field of segment assembly and lining method in trenchless repair construction, and particularly to segments, casting templates, skeleton nail length adjustment tools and pipeline repair methods applicable to pipeline inner wall repair. Background Technology

[0002] Among related technologies, commonly used trenchless repair techniques for drainage pipelines include in-situ curing, cement mortar spraying, interlocking, and segment assembly lining. The segment assembly lining method is suitable for repairing large-diameter pipelines with a diameter of 800mm or more. This method involves assembling prefabricated arc-shaped segments within the existing pipeline and injecting grout or other grouting materials between the prefabricated arc-shaped segments and the existing pipeline through grouting holes on the segments, thereby achieving the purpose of repairing the existing pipeline.

[0003] During assembly, a certain space needs to be reserved between the tunnel segment and the existing pipeline for grouting. In actual construction, tools such as jacks, struts, or wedge blocks are commonly used to support the inner arc surface of the tunnel segment, thereby maintaining the relative position of the tunnel segment and the inner wall of the existing pipeline.

[0004] Before grouting, segment support components (such as the aforementioned jacks, struts, or wedge blocks) need to be installed. During installation, the segment support components also need to be adjusted according to the actual conditions of the existing pipeline. After grouting and once the grout has reached a certain strength, the segment support components need to be removed. The above-mentioned construction process involves the sequential removal of segment support components, resulting in a relatively complex construction process and low segment installation efficiency. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a pipe segment suitable for pipe inner wall repair, which eliminates the need to remove pipe segment support components, simplifies the construction process, and improves pipe segment installation efficiency.

[0006] The present invention also proposes a casting template.

[0007] The present invention also proposes a tool for adjusting the length of the skeleton nail.

[0008] This invention also proposes a pipeline repair method.

[0009] A first aspect of the present invention provides a pipe segment, which includes a pipe segment body, a central skeleton nail, and a circumferential connecting structure. The pipe segment body is constructed in an arc-shaped plate shape; the circumferential connecting structure is disposed at the circumferential end of the pipe segment body, including a circumferential skeleton nail perpendicularly fixed to the outer arc surface of the pipe segment body and a circumferential insertion hole perpendicularly penetrating the pipe segment body; the length of the circumferential skeleton nail is greater than the depth of the circumferential insertion hole, such that when the circumferential skeleton nail of the pipe segment is inserted into the circumferential insertion hole of an adjacent pipe segment for circumferential connection, the portion of the circumferential skeleton nail protruding from the circumferential insertion hole is supported on the inner wall of the existing pipe, and a grouting fluid filling space is formed between the outer arc surface of the pipe segment body and the inner wall of the existing pipe.

[0010] In some embodiments, the segment includes an axial connection structure disposed at the axial end of the segment body, including an axial skeleton pin vertically fixed to the outer arc surface and an axial insertion hole vertically penetrating the segment body; the length of the axial skeleton pin is greater than the depth of the axial insertion hole, such that when the axial skeleton pin of the segment is inserted into the axial insertion hole of an adjacent segment for axial connection, the portion of the axial skeleton pin protruding from the axial insertion hole is supported together with the circumferential skeleton pin on the inner wall of the existing pipe.

[0011] In some embodiments, the axial end side and the circumferential end side of the segment body intersect and are sequentially defined as a first corner point, a second corner point, a third corner point, and a fourth corner point; the line connecting the first corner point and the second corner point is the axial end side; the line connecting the first corner point and the fourth corner point is the circumferential end side; the direction of the line connecting the first corner point and the third corner point is defined as diagonal; the segment body further includes an integrated connecting seat and a perforated connector; the first corner point is connected to the integrated connecting seat, and the integrated connecting seat is provided with the circumferential skeleton nail, the axial skeleton nail, and the diagonal skeleton nail; the second corner point... The three corner points are connected to the perforated connector, which has the circumferential insertion hole; the third corner point is connected to the perforated connector, which has the diagonal insertion hole; the fourth corner point is connected to the perforated connector, which has the axial insertion hole; wherein, the length of the diagonal skeleton nail is greater than the depth of the diagonal insertion hole, so that when the diagonal skeleton nail of one segment is inserted into the diagonal insertion hole of another segment located diagonally to connect, the part of the diagonal skeleton nail that protrudes from the diagonal insertion hole is supported together with the circumferential skeleton nail and the axial skeleton nail on the inner wall of the existing pipe.

[0012] In some embodiments, the integrated connector includes four connected positioning seats, one of which is connected to the first corner point, and the other three positioning seats are respectively provided with the circumferential skeleton nail, the axial skeleton nail, and the diagonal skeleton nail; the perforated connector is provided with a positioning countersink; wherein, the positioning seat is used to engage in the positioning countersink.

[0013] In some embodiments, the segment further includes a central skeleton nail, which is vertically fixed to the center of the outer arc surface of the segment body; the central skeleton nail is used to support the inner wall of the existing pipe and form a grouting fluid filling space between the outer arc surface of the segment body and the inner wall of the existing pipe. In some embodiments, the segment body includes a segment skeleton and a concrete body; the segment skeleton is embedded in the concrete body and includes a first arc-shaped support and a second arc-shaped support arranged in a cross configuration, the two ends of the first arc-shaped support are respectively located at the first corner point and the third corner point of the segment body, and the two ends of the second arc-shaped support are respectively located at the second corner point and the fourth corner point of the segment body.

[0014] The second embodiment of the present invention provides a casting template applied to the segment of the first aspect embodiment of the present invention. The casting template includes two opposing casting plates, both constructed as arc-shaped plates and respectively disposed on the inner and outer sides of the segment skeleton; four sealing strips sealingly connecting the axial end sides of the two casting plates and the circumferential end sides of the two casting plates, the sealing strips and the casting plates enclosing the casting space; one of the sealing strips has a casting port for introducing concrete into the casting space to form the concrete body of the segment.

[0015] A third aspect of the present invention provides a skeleton nail length adjustment tool, applied to the tube segment described in the first aspect of the present invention. The tool includes a heat-fusion component, a guide component, a handle component, and a pointer. The guide component includes two vertical plates and a connecting plate. The two vertical plates are arranged opposite each other and define a guide channel. The first ends of the two vertical plates are connected by the connecting plate. The connecting plate has a through-hole for the handle component to pass through. The second ends of the two vertical plates are spaced apart to form an opening communicating with the guide channel. The diameter of the opening is larger than the diameter of the skeleton nail. The heat-fusion component is slidably disposed within the guide channel. The handle component is connected to the heat-fusion component and located outside the guide channel to drive the heat-fusion component to slide. The heat-fusion component is used to heat-fuse the skeleton nail to achieve its length adjustment. The vertical plate has a strip groove extending parallel to the direction of the guide channel. The strip groove extends along the thickness direction of the vertical plate. The pointer is slidably disposed on the strip groove and connected to the heat-fusion component. The strip groove has a scale.

[0016] A fourth aspect of the present invention provides a pipeline repair method, comprising the following steps:

[0017] S1: Obtain the inner wall contour of the existing pipeline through a scanning device to obtain the pipe section to be repaired;

[0018] S2: Based on the pipe segment to be repaired, the lengths of the circumferential skeleton nails, axial skeleton nails, diagonal skeleton nails, and the length of the central skeleton nail on the pipe segment are adjusted using a skeleton nail length adjustment tool. The pipe segment is the pipe segment described in the first aspect embodiment of the present invention.

[0019] S3: The multiple pipe segments are connected circumferentially, axially, and diagonally. The circumferential skeleton nails, axial skeleton nails, diagonal skeleton nails, and central skeleton nails are supported on the inner wall of the existing pipe until the pipe segment assembly liner formed by the multiple pipe segments covers the pipe segment to be repaired. The outer arc surface of the pipe segment to be repaired and the pipe segment assembly liner are radially supported by the circumferential skeleton nails, axial skeleton nails, diagonal skeleton nails, and central skeleton nails to form a grouting space.

[0020] S4: Grout the space filled with the grouting fluid.

[0021] In some embodiments, the circumferential connection, axial connection, and diagonal connection of the plurality of segments includes the following steps:

[0022] S31: Connect multiple segments in a circumferential manner: Insert the circumferential skeleton nail of one segment into the circumferential insertion hole at the second corner point of the adjacent segment in a circumferential manner;

[0023] S32: Axially connect multiple segments: The axial skeleton pin of one segment is inserted into the axial insertion hole at the fourth corner point of the axially adjacent segment.

[0024] S33: Connect multiple segments diagonally: Insert a diagonal skeleton pin of one segment into a diagonal insertion hole located at the first triangular point of another segment diagonally.

[0025] In steps S31-S33, the circumferential skeleton nail, axial skeleton nail, and diagonal skeleton nail pass through the corresponding insertion holes and are supported together on the inner wall of the existing pipe.

[0026] As can be seen from the technical solution, the embodiments provided by the present invention have the following advantages:

[0027] (1) During construction, multiple pipe segments are connected into a ring structure through a circumferential connection structure. The pipe segments are supported on the inner wall of the existing pipeline by the circumferential skeleton nails of the circumferential connection structure. Thus, the ring structure formed by multiple pipe segments and the inner wall of the existing pipeline are separated by the circumferential skeleton nails to form a grouting space. It can be seen that the circumferential skeleton nails in this embodiment replace the pipe segment support components in the related technology and play the role of supporting the pipe segments, which can simplify the construction process;

[0028] (2) In the circumferential direction, adjacent segments are connected by inserting circumferential skeleton nails into circumferential holes to simplify the connection process between segments and thus simplify the construction process.

[0029] (3) When the segments of this application are assembled in an existing pipeline, after a circumferential skeleton nail is inserted into the circumferential insertion hole of an adjacent segment, since the length of the circumferential skeleton nail is set to be greater than the depth of the circumferential insertion hole, the circumferential skeleton nail protrudes from the outer arc surface of the segment body to abut against the inner wall of the segment body and the existing pipeline. Thus, the connection steps between segments and the steps of supporting the segments on the inner wall of the existing pipeline are combined into one step, which greatly simplifies the construction process, improves the assembly efficiency of segments in the existing pipeline, and greatly simplifies the construction process. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the tube segment according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the tube segment according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of multiple segments connected circumferentially to form a ring structure according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of a pipe segment according to an embodiment of the present invention. For ease of understanding, the curvature of the pipe segment has been omitted.

[0035] Figure 5 This is a schematic diagram of multiple segments connected to form a 2×2 splicing unit according to an embodiment of the present invention. For ease of understanding, the curvature of the segments has been omitted.

[0036] Figures 6-7 This is a schematic diagram of the segment skeleton according to an embodiment of the present invention;

[0037] Figures 8-9 This is a schematic diagram of the assembly of the segment frame and the cast wooden board according to an embodiment of the present invention;

[0038] Figures 10-11 This is a schematic diagram of the skeleton nail length adjustment tool according to an embodiment of the present invention;

[0039] Figure 12This is a schematic diagram of the structure of the guide component according to an embodiment of the present invention;

[0040] Figure 13 This is an assembly diagram of the handle component, the heat-fused component, and the pointer according to an embodiment of the present invention;

[0041] Figure 14 This is a schematic diagram of a composite pipeline according to an embodiment of the present invention.

[0042] Figure label:

[0043] Composite pipe 10000;

[0044] The segment assembly lining is 1000mm, the grouting filling layer is 2000mm, and the existing pipeline is 3000mm.

[0045] 100 segments, 200 casting templates, 300 skeleton nail length adjustment tools;

[0046] Segment body 1, circumferential end side 101, axial end side 102, first corner point 11, second corner point 12, third corner point 13, fourth corner point 14, segment frame 15, first arc-shaped support 151, second arc-shaped support 152, concrete body 16;

[0047] Central skeleton nail 2;

[0048] Circumferential connection structure 3, circumferential skeleton nail 31, circumferential insertion hole 32;

[0049] Axial connection structure 4, axial skeleton nail 41, axial insertion hole 42;

[0050] Diagonal connection structure 5, diagonal skeleton nail 51, diagonal insertion hole 52;

[0051] Integrated connecting seat 6, positioning seat 61, connecting positioning seat 61a, circumferential positioning seat 61b, axial positioning seat 61c, diagonal positioning seat 61d;

[0052] 7. Connector with holes; 71. Positioning countersunk plate;

[0053] 81. Casting slab; 82. Sealing strip; 83. Casting port;

[0054] Guide component 91, vertical plate 911, strip groove 9111, connecting plate 912, through hole 9121, guide channel 913, opening 914, spacer retainer 915, hot melt component 92, heat insulation sheet 921, slide plate 922, soldering iron tip 923, handle component 93, grip 931, connecting rod 932, pointer 94;

[0055] Circumferential direction S, axial direction N. Detailed Implementation

[0056] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Currently, commonly used trenchless repair techniques for drainage pipelines include in-situ curing, cement mortar spraying, interlocking, and segment assembly with internal lining. Among these, segment assembly with internal lining is more suitable for repairing large-diameter pipelines with a diameter of 800 mm or more.

[0060] The segment assembly and lining method involves assembling precast arc-shaped segments within an existing pipeline. Grouting materials, such as mortar, are injected between the precast arc-shaped segments and the existing pipeline through grouting holes on the segments to achieve bonding. During assembly, a certain space needs to be reserved between the segments and the existing pipeline for grouting. Jacks, struts, or wedge-shaped blocks are often used to support the segments. When installing the segments, it is necessary to ensure that each segment fits tightly vertically and horizontally. The length and position of the segment support components must also be adjusted according to the corrosion condition of the original concrete pipeline wall. The segment support components must be removed before grouting and after the grout has reached a certain strength. Therefore, the process is relatively complex and the segment installation efficiency is relatively low.

[0061] The following is for reference. Figures 1-14 The present invention describes a pipe segment 100, a casting template 200, a skeleton nail length adjustment tool 300, and a pipe repair method according to embodiments of the present invention.

[0062] Example 1

[0063] like Figures 1-3 As shown, a first aspect embodiment of the present invention provides a tube segment 100, which includes a tube segment body 1 and a circumferential connection structure 3.

[0064] The segment body 1 is an arc-shaped plate. Here, the segment body 1 being an arc-shaped plate means that the segment body 1 is plate-shaped as a whole, that is, it has a certain thickness, length and width, and the overall shape is a flat plate structure; at the same time, the two large surfaces (outer arc surface and inner arc surface) of the segment body 1 are parallel cylindrical surfaces, rather than planes.

[0065] Here, "circumferential" refers to the arc-shaped extension direction of the segment body 1.

[0066] A circumferential connection structure 3 is provided at the circumferential end of the segment body 1. The circumferential connection structure 3 includes a circumferential skeleton pin 31 and a circumferential insertion hole 32. Optionally, a segment 100 has a circumferential skeleton pin 31 at one circumferential end and a circumferential insertion hole 32 at the other circumferential end. When two adjacent segments 100 are connected, the circumferential skeleton pin 31 of one segment 100 can be inserted into the circumferential insertion hole 32 of the other segment 100, so that the two segments 100 are connected in the circumferential direction. Alternatively, a segment 100 has a circumferential skeleton pin 31 and a circumferential insertion hole 32 at one circumferential end and a circumferential skeleton pin 31 and a circumferential insertion hole 32 at the other circumferential end. When two adjacent segments 100 are connected, the circumferential skeleton pin 31 of one segment 100 can be inserted into the circumferential insertion hole 32 of the other segment 100, so that the two segments 100 are connected in the circumferential direction.

[0067] The circumferential skeleton nail 31 is vertically disposed on the outer arc surface of the segment body 1, that is, one end of the circumferential skeleton nail 31 is fixed on the outer arc surface of the segment body 1, and the other end of the circumferential skeleton nail 31 extends along the normal direction perpendicular to the outer arc surface. The circumferential insertion hole 32 penetrates the segment body 1 and the penetration direction of the circumferential insertion hole 32 is perpendicular to the normal direction of the segment body 1.

[0068] like Figure 3 As shown, the circumferential skeleton nail 31 of the segment 100 is inserted into the circumferential insertion hole 32 of the adjacent segment 100 to connect the adjacent segments 100 in a circumferential manner.

[0069] like Figure 3As shown, the length of the circumferential skeleton nail 31 is greater than the depth of the circumferential insertion hole 32. Therefore, when the circumferential skeleton nail 31 is inserted into the circumferential insertion hole 32, a part of the circumferential skeleton nail 31 passes through the circumferential insertion hole 32 and protrudes from the outer arc surface of the segment body 1. The part of the circumferential skeleton nail 31 that protrudes from the circumferential insertion hole 32 is supported on the inner wall of the existing pipe 3000 and separates the outer arc surface of the segment body 1 from the inner wall of the existing pipe 3000 to form a grout filling space.

[0070] See Figures 1-3 In a specific application scenario, multiple pipe segments 1 are connected into a ring structure via a circumferential connection structure 3. The circumferential connection structure 3 is located at the circumferential ends of the pipe segments 1, that is, at the two ends of the pipe segments 1 in the arc-shaped extension direction. Circumferential skeleton nails 31 of adjacent pipe segments 100 are inserted into circumferential insertion holes 32, splicing multiple pipe segments 100 along the arc-shaped extension direction to ultimately form a complete ring structure. Correspondingly, the length of the circumferential skeleton nails 31 is greater than the depth of the circumferential insertion holes 32, so that the circumferential skeleton nails 31 protrude radially from the outer arc surface of the ring structure. The circumferential skeleton nails 31 are spaced circumferentially along the ring structure and are used to support the inner wall of the existing pipe 3000. The ring structure and the inner wall of the existing pipe 3000 are radially separated by the circumferential skeleton nails 31 to form a grouting fluid filling space.

[0071] As can be seen from the technical solution, the embodiments provided by the present invention have the following advantages:

[0072] (1) During construction, multiple pipe segments 1 are connected into a ring structure by a circumferential connection structure 3. The pipe segments 1 are supported on the inner wall of the existing pipe 3000 by the circumferential skeleton nails 31 of the circumferential connection structure 3. Thus, the ring structure formed by multiple pipe segments 100 and the inner wall of the existing pipe 3000 are separated by multiple circumferential skeleton nails 31 to form a grouting space. It can be seen that the circumferential skeleton nails 31 in this embodiment replace the pipe segment support components in the related technology and play the role of supporting the pipe segments 100, which can simplify the construction process.

[0073] (2) In the circumferential direction, adjacent segments 100 are connected by inserting circumferential skeleton nails 31 into circumferential insertion holes 32 to simplify the connection process between segments and thus simplify the construction process.

[0074] (3) When the segment 100 of this application is assembled in the existing pipeline 3000, after a circumferential skeleton nail 31 is inserted into the circumferential insertion hole 32 of the adjacent segment 100, since the length of the circumferential skeleton nail 31 is greater than the depth of the circumferential insertion hole 32, the circumferential skeleton nail 31 protrudes from the outer arc surface of the segment body 1 to abut against the inner wall of the segment body 1 and the existing pipeline 3000. Thus, the connection step between segments and the step of supporting the segment on the inner wall of the existing pipeline 3000 are combined into one step, which greatly simplifies the construction process, improves the assembly efficiency of the segment 100 in the existing pipeline 3000, and greatly simplifies the construction process.

[0075] like Figure 1 and Figure 3 As shown, the segment 100 further includes a central skeleton nail 2, which is vertically fixed to the center of the outer arc surface of the segment body 1. The central skeleton nail 2 is used to support the inner wall of the existing pipe 3000 and form a grouting space between the outer arc surface of the segment body 1 and the inner wall of the existing pipe 3000. The segment body 1 is an arc-shaped plate with an outer arc surface. The circumferential skeleton nails 31 are mainly distributed at the circumferential ends of the segment 100. The central skeleton nail 2 is located at the center of the outer arc surface, which can form an additional support point in the middle of the segment 100, forming a multi-point support system with the circumferential skeleton nails 31 at the edge. This distribution improves the overall stress balance of the segment 100 and reduces the risk of local deformation.

[0076] Example 2

[0077] like Figure 1 As shown, the segment 100 further includes an axial connection structure 4, which is located at the axial end of the segment body 1. The axial connection structure 4 includes an axial skeleton nail 41 that is vertically fixed to the outer arc surface and an axial insertion hole 42 that is vertically penetrating the segment body 1. The length of the axial skeleton nail 41 is greater than the depth of the axial insertion hole 42. When the axial skeleton nail 41 of the segment 100 is inserted into the axial insertion hole 42 of the adjacent segment 100 to axially connect the adjacent segments 100, the part of the axial skeleton nail 41 that protrudes from the axial insertion hole 42 is supported together with the circumferential skeleton nail 31 on the inner wall of the existing pipe 3000.

[0078] Accordingly, the axial direction here refers to the direction perpendicular to the circumferential (arc-shaped extension direction) of the segment body 1, that is, the direction of extension along the axis of the annular structure formed by splicing segments 100.

[0079] The axial connection structure 4 is located at the axial ends of the segment body 1, that is, at both ends of the segment body 1 in the axial direction. The axial connection structure 4 includes an axial skeleton pin 41 and an axial insertion hole 42: the axial skeleton pin 41 is vertically fixed to the outer arc surface of the segment body 1, that is, one end of the axial skeleton pin 41 is fixed to the outer arc surface of the segment body 1, and the other end extends along the normal direction perpendicular to the outer arc surface of the segment body; the axial insertion hole 42 penetrates the segment body 1 vertically, and its penetration direction is perpendicular to the normal direction of the segment body 1, matching the extension direction of the axial skeleton pin 41. Optionally, a segment 100 has an axial skeleton pin 41 at one axial end and an axial insertion hole 42 at the other axial end. When two adjacent segments 100 are axially connected, the axial skeleton pin 41 of one segment 100 can be inserted into the axial insertion hole 42 of the other segment 100, so that the two segments 100 are connected in the axial direction. Optionally, a segment 100 may have both an axial skeleton pin 41 and an axial insertion hole 42 at one axial end and at the other axial end. When two adjacent segments 100 are axially connected, the axial connection is completed by inserting the axial skeleton pin 41 of one segment 100 into the axial insertion hole 42 of the other segment 100.

[0080] The length of the axial skeleton nail 41 is greater than the depth of the axial insertion hole 42: When adjacent segments 100 are axially connected through the axial connection structure 4, the axial skeleton nail 41 will protrude radially from the outer arc surface of the segment body 1 along the annular structure. Since the axial skeleton nail 41 and the circumferential skeleton nail 31 extend in the same direction (both perpendicular to the normal of the outer arc surface), they can jointly support the inner wall of the existing pipe 3000, further enhancing the support stability of the annular structure.

[0081] In a specific application scenario, multiple pipe segments 100 are first assembled circumferentially through a circumferential connection structure 3: each pipe segment 100, based on its own arc-shaped extension direction (circumferential), inserts its circumferential skeleton nail 31 into the circumferential insertion hole 32 of the adjacent pipe segment 100, and is sequentially spliced ​​to form a complete ring structure (i.e., a single ring). At this time, each pipe segment 100 of the ring structure has formed a closure in the circumferential direction, and the circumferential skeleton nail 31 protrudes from the outer arc surface of the ring structure, initially achieving support for the inner wall of the existing pipeline 3000. Subsequently, multiple such ring structures are extended axially through an axial connection structure 4: each ring structure has an axial skeleton nail 41 or an axial insertion hole 42 at the axial end (the end along the axial axis of the ring structure), and the corresponding pipe segments 100 of adjacent ring structures are axially connected by inserting the axial skeleton nail 41 into the axial insertion hole 42. For example, the axial skeleton nail 41 of a segment 100 in the previous annular structure is inserted into the axial insertion hole 42 of the corresponding segment 100 in the next annular structure, and so on, to complete the axial connection of all corresponding segments 100. Finally, multiple annular structures are spliced ​​together into a whole along the axial direction (the axial direction of the annular structure). At this time, the circumferential skeleton nail 31 and the axial skeleton nail 41 are supported together on the inner wall of the existing pipe 3000, ensuring that the grout filling space between the entire extension structure and the inner wall of the existing pipe 3000 remains continuous and stable in both the circumferential and axial directions.

[0082] In another specific application scenario, multiple segments 100 are first spliced ​​into an axial segment group via an axial connection structure 4: each segment 100 extends axially, and is inserted into the axial insertion hole 42 of the adjacent segment 100 through an axial skeleton nail 41 at its axial end, and is spliced ​​sequentially to form a long strip-shaped axial segment group extending axially (each group of segments is continuous in the axial direction and arc-shaped in the circumferential direction). At this time, each segment 100 in the axial segment group protrudes from the outer arc surface through the length design of the axial skeleton nail 41, providing initial support. Subsequently, multiple such axial segment groups are closed circumferentially through a circumferential connection structure 3: each axial segment group has a circumferential skeleton nail 31 or a circumferential insertion hole 32 at its circumferential end (the end in the arc-shaped extension direction), and adjacent axial segment groups are connected circumferentially by inserting the circumferential skeleton nail 31 into the circumferential insertion hole 32. For example, the circumferential skeleton nail 31 of the first axial segment group is inserted into the circumferential insertion hole 32 of the second axial segment group, and so on, until multiple axial segment groups form a closed annular structure along the circumferential direction (arc extension direction). At this time, the circumferential skeleton nail 31 and the axial skeleton nail 41 jointly support the inner wall of the existing pipe 3000, forming a complete grouting fluid filling space between the annular structure and the existing pipe 3000.

[0083] As can be seen from the above embodiments, the segment 100 further includes a central skeleton nail 2, which is vertically fixed to the center of the outer arc surface of the segment body 1. The central skeleton nail 2 is used to support the inner wall of the existing pipe 3000. The segment body 1 is an arc-shaped plate, and the outer arc surface is an arc-shaped curved surface. The axial skeleton nail 41 and the circumferential skeleton nail 31 are mainly distributed at the axial and circumferential ends of the segment 100. The central skeleton nail 2 is located at the center of the outer arc surface, which can form an additional support point in the middle of the segment 100, forming a multi-point support system with the circumferential skeleton nail 31 and the axial skeleton nail 41 at the edge. This distribution improves the overall force balance of the segment 100 and reduces the risk of local deformation.

[0084] Example 3

[0085] Combination Figure 1 , Figure 2 and Figure 4 As shown, further, the axial end side 102 and the circumferential end side 101 of the segment body 1 intersect and are sequentially defined as the first corner point 11, the second corner point 12, the third corner point 13 and the fourth corner point 14; the line connecting the first corner point 11 and the second corner point 12 is the axial end side 102; the line connecting the first corner point 11 and the fourth corner point 14 is the circumferential end side 101; the direction of the line connecting the first corner point 11 and the third corner point 13 is defined as diagonal. Correspondingly, the line connecting the second corner point 12 and the third corner point 13 is the circumferential end side 101, the connection direction between the second corner point 12 and the fourth corner point 14 is defined as diagonal, and the line connecting the third corner point 13 and the fourth corner point 14 is the axial end side 102; the segment 100 includes an integrated connecting seat 6 and a perforated connector 7; the first corner point 11 is connected to the integrated connecting seat 6, which is provided with a circumferential skeleton nail 31, an axial skeleton nail 41, and a diagonal skeleton nail 51; the second corner point 12 is connected to the perforated connector 7, which has a circumferential insertion hole 32; the third corner point 13 is connected to the perforated connector 7, which has a diagonal insertion hole 52, and one segment 1 The diagonal skeleton nail 51 of the 00 is used to be inserted into the diagonal insertion hole 52 of the other diagonal segment 100 to connect the other diagonal segment 100, and the length of the diagonal skeleton nail 51 is greater than the depth of the diagonal insertion hole 52; the fourth corner point 14 is connected to a perforated connector 7, which has an axial insertion hole 42; wherein, the length of the diagonal skeleton nail 51 is greater than the depth of the diagonal insertion hole 52, so that when the diagonal skeleton nail 51 of the segment 100 is inserted into the diagonal insertion hole 52 of the other diagonal segment to connect, the part of the diagonal skeleton nail 51 that protrudes from the diagonal insertion hole 52 is supported together with the circumferential skeleton nail 31 and the axial skeleton nail 41 on the inner wall of the existing pipe 3000.

[0086] This means that the segment 100 includes a diagonal connection structure 5, which includes a diagonal skeleton nail 51 and a diagonal insertion hole 52.

[0087] like Figure 1 , Figure 4 and Figure 5 As shown, with the first corner point 11 of the tube segment 100 where the integrated connector 6 is located as the center, four tube segments 100 can interlock with each other through the circumferential connection structure 3, the axial connection structure 4, and the diagonal connection structure 5 to form a 2×2 splicing unit: On the integrated connector 6 at the first corner point 11 of the central tube segment 100, the circumferential skeleton nail 31 is inserted into the circumferential insertion hole 32 on the second corner point 12 of the adjacent tube segment 100 to achieve circumferential connection; the axial skeleton nail 41 is inserted into the axial insertion hole 42 on the fourth corner point 14 of the adjacent tube segment 100 to achieve axial connection; the diagonal skeleton nail 51 is inserted into the diagonal insertion hole 52 on the first triangular point 13 of the diagonal tube segment 100 to achieve diagonal connection. In this way, the four tube segments 100 surround the central integrated connector 6 ( Figure 5 The integrated connector 6 (shown by thick lines) forms a mutually restraining unit grid in three dimensions: circumferential, axial, and diagonal. Each segment 100 serves both as a connection object and provides support to adjacent segments 100 through its own skeleton nails, making the 2×2 unit a structural closed loop. This strengthens the splicing strength of the segments 100, resulting in better overall resistance to slippage and torsion, achieving a balance between structural stability and ease of construction within a limited space.

[0088] Combination Figure 1 and Figure 2 Furthermore, the integrated connecting seat 6 includes four connected positioning seats 61, one of which is a connecting positioning seat 61a and is connected at the first corner point 11. The other three positioning seats 61 are a circumferential positioning seat 61b, an axial positioning seat 61c, and a diagonal positioning seat 61d, and are respectively provided with a circumferential skeleton nail 31, an axial skeleton nail 41, and a diagonal skeleton nail 51. The perforated connector 7 is provided with a positioning countersink 71. The positioning seat 61 is used to engage in the positioning countersink 71. This means that the positioning recesses 71 on the perforated connectors 7 (located at the second, third, and fourth corners respectively) are recessed structures that match the shape of the positioning seats 61. When adjacent segments 100 are spliced, the positioning seats 61 on the integrated connectors 6 will be engaged in the positioning recesses 71 of the perforated connectors 7, thus creating a mechanical lock between the positioning seats 61 and the positioning recesses 71. The engagement between the positioning seats 61 and the positioning recesses 71 can limit the lateral displacement or angular deviation of adjacent segments 100 during splicing, avoiding the loosening or offset that may occur if only the skeleton nails and the insertion holes are engaged, making the circumferential, axial, and diagonal connections tighter.

[0089] Furthermore, the positioning platform 71 is a right-angled groove, and the two adjacent sidewalls of the right-angled groove are parallel to the axial direction and the circumferential direction, respectively.

[0090] Figures 4-5 The diagram shows a schematic of the connection plane of segment 100 and the repaired segment 100. For ease of understanding, the curvature of segment 100 is omitted from the diagram. When segments 100 are assembled and connected, the skeleton nails of the positioning seat 61 are inserted into the holes of the connector 7 with holes and fit into the right-angle groove to fix the direction. After the segments 100 are assembled, the new pipeline will form a self-supporting structure. When a segment 100 is subjected to an inward radial force or an outward radial force, the force will be transmitted to the entire pipeline structure through the interaction of the positioning seat 61 and the positioning countersunk platform 71. When the segment 100 itself is not damaged, there will be no loosening of the segments 100. Therefore, the reliability of the connection between segments 100 is improved while ensuring the strength of the segment 100 itself.

[0091] It should be emphasized that the segment 100 in this embodiment is more convenient, safe and efficient to use, and problematic segments 100 during installation are easy to replace, which improves the fault tolerance of construction and reduces the workload.

[0092] Example 4

[0093] like Figure 1 , Figure 6 and Figure 7 As shown, the segment body 1 further includes a segment skeleton 15 and a concrete body 16. The segment skeleton 15 is embedded in the concrete body 16 and includes a first arc-shaped support 151 and a second arc-shaped support 152 arranged in a cross configuration. The two ends of the first arc-shaped support 151 are located at the first corner point 11 and the third corner point 13 of the segment body 1, respectively, and the two ends of the second arc-shaped support 152 are located at the second corner point 12 and the fourth corner point 14 of the segment body 1, respectively. That is to say, the concrete body 16 encloses the segment skeleton 15. The segment skeleton 15 can bear tensile and shear forces, while the concrete body 16 can bear compressive forces. The segment skeleton 15 resists the misalignment and torsional forces during the assembly of the segment 100 through its cross-arc design, while the concrete, relying on its overall shape, bears the grouting pressure and the radial pressure of the existing pipeline 3000. The two work together to improve the deformation resistance of the segment body 1, especially enhancing the rigidity of the arc-shaped plate structure.

[0094] In conjunction with the above embodiments, the central skeleton nail 2 is integrally set at the intersection center of the segment skeleton 15.

[0095] The integrated connector 6 is connected to the end of the first arc-shaped bracket 151 at the first corner point 11. Three perforated connectors 7 are respectively located at the ends of the first arc-shaped bracket 151 at the third corner point 13, the second arc-shaped bracket 152 at the second corner point 12, and the second arc-shaped bracket 152 at the fourth corner point 14. Therefore, the segment frame 15 can resist the misalignment and torsional forces transmitted from other segments 100 via the integrated connector 6, improving stability.

[0096] In a specific example, the central skeleton nail 2, the circumferential skeleton nail 31, the axial skeleton nail 41, and the diagonal skeleton nail 51 are all made of rigid plastic.

[0097] Example 5

[0098] like Figure 8 and Figure 9 As shown, the second embodiment of the present invention provides a casting template 200, which is applied to the segment 100 of embodiment five. That is, the central skeleton nail 2 is integrally set at the intersection center of the segment skeleton 15, the integrated connecting seat 6 is connected to the end of the first arc-shaped bracket 151 located at the first corner point 11, and there are three perforated connecting parts 7, which are respectively located at the end of the first arc-shaped bracket 151 located at the third corner point 13, the end of the second arc-shaped bracket 152 located at the second corner point 12, and the end of the second arc-shaped bracket 152 located at the fourth corner point 14.

[0099] The casting formwork 200 is used to form the concrete body 16 of the segment body 1.

[0100] The casting formwork 200 includes a casting plate 81 and a sealing strip 82. There are two casting plates 81, which are arranged opposite to each other on the inner and outer sides of the segment frame 15. Each casting plate 81 is constructed as an arc-shaped plate. That is, the casting plate 81 has two axial end sides and two circumferential end sides.

[0101] A sealing strip 82 is connected between one axial end side of one casting slab 81 and one axial end side of another casting slab 81; another sealing strip 82 is connected between the other axial end side of one casting slab 81 and the other axial end side of another casting slab 81; yet another sealing strip 82 is connected between one circumferential end side of one casting slab 81 and one circumferential end side of another casting slab 81; and yet another sealing strip 82 is connected between the other circumferential end side of one casting slab 81 and the other circumferential end side of another casting slab 81. The four sealing strips 82 and the two casting slabs 81 enclose a casting space. One of the sealing strips 82 has a casting port 83, which is used to introduce concrete into the casting space to form the concrete body 16 of the segment 100.

[0102] like Figure 8 and Figure 9 As shown, in some embodiments, the integrated connector 6 is provided with a casting plate fastening hole and a retaining strip fastening hole; the perforated connector 7 is provided with a casting plate fastening hole and a sealing retaining strip fastening hole. One and another casting plates 81 are fixedly connected to the integrated connector 6 by fasteners passing through the casting plate fastening holes on the integrated connector 6, and one and another casting plates 81 are fixedly connected to the perforated connector 7 by fasteners passing through the casting plate fastening holes on the perforated connector 7; each sealing retaining strip 82 is fixedly connected to the integrated connector 6 by fasteners passing through the sealing element fastening holes on the integrated connector 6, and each sealing retaining strip 82 is fixedly connected to the perforated connector 7 by fasteners passing through the sealing element fastening holes on the perforated connector 7.

[0103] In this embodiment, the casting template 200 forms a dual support structure of the segment skeleton 15 and the concrete body 16 in the segment body 1. The two work together to improve the deformation resistance of the segment body 1, and in particular, enhance the rigidity of the arc-shaped plate structure.

[0104] Optionally, the number of sealing strips 82 is three, and none of them are provided with a pouring port 83. The sealing strips 82 and the pouring plate 81 are fixed to the segment frame 15, leaving one side without the sealing strips 82 to form a pouring port 83.

[0105] Example 6

[0106] like Figures 10-13 As shown, a third aspect embodiment of the present invention provides a skeleton nail length adjustment tool 300, which is applied to the tube segment 100 of the first aspect embodiment of the present invention. The skeleton nail length adjustment tool 300 includes a heat-melting component 92, a guide component 91, a handle component 93, and a pointer 94. The guide component 91 includes two vertical plates 911 and a connecting plate 912. The two vertical plates 911 are arranged opposite each other and define a guide channel 913. The first ends of the two vertical plates 911 are connected by the connecting plate 912. The connecting plate 912 has a through-hole 9121 for the handle component 93 to pass through. The second ends of the two vertical plates 911 are spaced apart to form an opening 914 that connects to the guide channel 913. The diameter of the opening 914 is larger than the diameter of the skeleton nail. The hot-melt component 92 is slidably disposed in the guide channel 913. The handle component 93 is connected to the hot-melt component 92 and is located outside the guide channel 913 to drive the hot-melt component 92 to slide. The hot-melt component 92 is used to hot-melt the skeleton nail to achieve its length adjustment. The vertical plate 911 has a strip groove 9111 extending parallel to the direction of the guide channel 913. The strip groove 9111 extends along the thickness direction of the vertical plate 911. The pointer 94 is slidably disposed on the strip groove 9111 and connected to the hot-melt component 92. The strip groove 9111 has a scale.

[0107] In a specific application scenario, the rigid plastic skeleton nail has a sufficient length. When it needs to be shortened to the target length, the hot-melt component 92 is first adjusted to a position slightly further than the initial length of the skeleton nail. In use, the skeleton nail to be adjusted on the tube 100 is first fed into the guide channel 913 through the opening 914 at the second end of the guide component 91. The hot-melt component 92 is pushed along the guide channel 913 by the handle component 93. At this time, the pointer 94 connected to the hot-melt component 92 will slide synchronously with it in the strip groove 9111 of the vertical plate 911. The scale on the strip groove 9111 can visually show the relative position of the hot-melt component 92 and the skeleton nail. The hot-melt component 92 is activated, and the handle component 93 drives the hot-melt component 92 to press down on the end of the skeleton nail and melt it, thus shortening the length of the skeleton nail. After adjustment, the hot-melt component 92 is retracted by the handle, and the tool can be removed. The coordination between the pointer 94 and the scale ensures the accuracy of the length adjustment, adapting to the installation requirements of the skeleton nail.

[0108] Furthermore, the skeleton nail length adjustment tool 300 also includes a scanning device, which can scan the inner wall contour of the existing pipe 3000 to obtain the skeleton nail length adjustment benchmark. In the application to the repair of irregular inner walls of concrete drainage pipes, after cleaning the existing pipe 3000, the scanning device first enters the existing pipe 3000 to scan and model its inner wall. Based on the corrosion and damage depth of the inner wall of the existing pipe 3000, the skeleton nails on the central skeleton nail 2 and the integrated connecting seat 6 are shortened, thereby ensuring that the pipe segment 100 can be stably supported and in the correct position after being installed in the existing pipe 3000. After the pipe segment 100 is installed, grouting is performed. When the strength of the grouting material reaches the requirements, a new pipe lining is formed.

[0109] In a specific example, the second ends of the two vertical plates 911 are spaced apart and connected by two spacer holders 915. That is, the side of the second end of the vertical plate 911 and the two spacer holders 915 form an opening 914. The side of the second end of the vertical plate 911 needs to be pressed against the outer arc surface of the tube body 1 to fix its position, and a certain pressure also needs to be applied. The spacer holders 915 prevent the long-term pressing from causing changes in the spacing between the two vertical plates 911, thereby avoiding deformation of the guide channel 913.

[0110] In a specific example, the handle component 93 includes a connecting rod 932 and a gripping part 931, which is connected to the thermoforming component 92 via the connecting rod 932. The gripping part 931 is used for gripping when using the thermoforming component 92, and a connecting wire can be provided at the tail of the gripping part 931 for electrical connection to a power source. The gripping part 931 and the connecting rod 932 are hollow. An electric heating control board is disposed inside the gripping part 931 and leads out the aforementioned connecting wire for electrical connection to a power source. The heating core assembly of the thermoforming component 92 is disposed inside the connecting rod 932 and is electrically connected to the electric heating control board. The heating core assembly includes a soldering iron tip 923 as a heat output end, and the soldering iron tip 923 is separated from the connecting rod 932 by a heat insulation sheet 921. Slide plates 922 are provided on both sides of the heat insulation sheet 921. The slide plates 922 are parallel to the vertical plate 911 and are used to mount the pointer 94.

[0111] Example 7

[0112] A fourth aspect of the present invention provides a pipeline repair method, comprising the following steps:

[0113] S1: Obtain the inner wall contour of the existing pipeline through a scanning device to obtain the pipe section to be repaired;

[0114] S2: Based on the pipe segment to be repaired, the lengths of the circumferential skeleton nails, axial skeleton nails, diagonal skeleton nails, and the length of the central skeleton nail on the pipe segment are adjusted using a skeleton nail length adjustment tool. The pipe segment is the pipe segment of the first aspect embodiment of the present invention.

[0115] S3: Multiple pipe segments are connected circumferentially, axially, and diagonally. Circumferential skeleton nails, axial skeleton nails, diagonal skeleton nails, and central skeleton nails are used to support the inner wall of the existing pipe until the pipe segments are connected to form a pipe segment assembly lining that covers the pipe segment to be repaired. The outer arc surface of the pipe segment to be repaired and the pipe segment assembly lining are separated by radial support intervals formed by circumferential skeleton nails, axial skeleton nails, diagonal skeleton nails, and central skeleton nails to form a grouting space.

[0116] S4: Grouting into the grouting fluid filling space.

[0117] In some embodiments, connecting multiple segments circumferentially, axially, and diagonally includes the following steps:

[0118] S31: Connect multiple segments in a circumferential manner: Insert the circumferential skeleton nail of one segment into the circumferential insertion hole at the second corner point of the adjacent segment in a circumferential manner;

[0119] S32: Axially connect multiple segments: The axial skeleton pin of one segment is inserted into the axial insertion hole at the fourth corner point of the axially adjacent segment.

[0120] S33: Connect multiple segments diagonally: Insert a diagonal skeleton pin of one segment into a diagonal insertion hole located at the first triangular point of another segment diagonally.

[0121] In steps S31-S33, the circumferential skeleton nail, the axial skeleton nail, and the diagonal skeleton nail pass through the corresponding insertion holes and are supported together on the inner wall of the existing pipe.

[0122] It is worth noting that, such as Figure 1 and Figure 4 As shown, with the first corner point 11 of the tube segment 100 where the integrated connecting seat 6 is located as the center, the four tube segments 100 can be interlocked with each other through the circumferential connecting structure 3, the axial connecting structure 4, and the diagonal connecting structure 5 to form a 2×2 splicing unit, and gradually spliced ​​into a ring-shaped tube segment assembly liner.

[0123] Simultaneously, on the integrated connecting seat 6 at the first corner point 11 of the tube segment 100, circumferential skeleton nails 31 are inserted into circumferential insertion holes 32 at the second corner point 12 of the adjacent tube segment 100 to achieve circumferential connection; axial skeleton nails 41 are inserted into axial insertion holes 42 at the fourth corner point 14 of the adjacent tube segment 100 to achieve axial connection; and diagonal skeleton nails 51 are inserted into diagonal insertion holes 52 at the first triangular point 13 of the diagonal tube segment 100 to achieve diagonal connection. In this way, the four tube segments 100 surround the integrated connecting seat 6 at the center (… Figure 4 The integrated connector 6 (shown by thick lines) forms a mutually restraining unit grid in three dimensions: circumferential, axial, and diagonal. Each segment 100 serves both as a connection object and provides support to adjacent segments 100 through its own skeleton nails, making the 2×2 unit a structural closed loop. This strengthens the splicing strength of the segments 100, resulting in better overall resistance to slippage and torsion, achieving a balance between structural stability and ease of construction within a limited space.

[0124] Through the above assembly steps, the connection steps between segments and the steps of supporting the segments on the inner wall of the existing pipeline 3000 are combined into one step, which greatly simplifies the construction process, improves the assembly efficiency of segments 100 in the existing pipeline 3000, and greatly simplifies the construction process.

[0125] like Figure 14 As shown, according to the above-described pipeline repair method, a composite pipeline 10000 can be obtained. The composite pipeline 10000 includes an existing pipeline 3000, a grout filling layer 2000, and a segment 100 according to the first aspect of the present invention. There are multiple segments 100, and multiple segments 100 are connected by an annular connection structure to form an annular segment assembly liner 1000. The inner wall of the existing pipeline 3000 and the outer arc surface of the segment assembly liner 1000 are radially supported and spaced by circumferential skeleton nails 31 to form an annular grout filling space. The grout filling layer 2000 is disposed in the grout filling space.

[0126] Using the existing pipeline 3000 as the outer layer, an annular segment assembly liner 1000 is formed by splicing multiple segments 100 through a circumferential connection structure 3. As can be seen from the above embodiment, the circumferential skeleton nails 31, axial skeleton nails 41, diagonal skeleton nails 51 and central skeleton nails 2 on the segments 100 work together to provide support, separating the outer arc surface of the segment assembly liner 1000 from the inner wall of the existing pipeline 3000 in the radial direction, forming an annular grouting fluid filling space. Finally, the grouting fluid filling layer 2000 fills this space, so that the existing pipeline 3000, the grouting fluid filling layer 2000 and the segment assembly liner 1000 are combined into an integral composite structure.

[0127] Other configurations and operations of the composite pipe 10000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The vertical, horizontal, and front-back directions are defined as shown in the figures.

[0128] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0129] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0130] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pipe section suitable for use in the repair of the internal wall of a pipe, characterised in that, The pipe segment comprises: a pipe segment body configured as an arc-shaped plate; a circumferential connecting structure arranged at a circumferential end of the pipe segment body, comprising a circumferential frame nail fixed perpendicularly to an outer arc surface of the pipe segment body and a circumferential insertion hole penetrating through the pipe segment body; a length of the circumferential frame nail is greater than a depth of the circumferential insertion hole, so that when the circumferential frame nail of a pipe segment is inserted into a circumferential insertion hole of an adjacent pipe segment for circumferential connection, a part of the circumferential frame nail that penetrates out of the circumferential insertion hole is supported on an inner wall of an existing pipeline, and a grouting liquid filling space is formed between the outer arc surface of the pipe segment body and the inner wall of the existing pipeline; an axial connecting structure arranged at an axial end of the pipe segment body, comprising an axial frame nail fixed perpendicularly to the outer arc surface and an axial insertion hole penetrating through the pipe segment body; a length of the axial frame nail is greater than a depth of the axial insertion hole, so that when the axial frame nail of a pipe segment is inserted into an axial insertion hole of an adjacent pipe segment for axial connection, a part of the axial frame nail that penetrates out of the axial insertion hole is supported on the inner wall of the existing pipeline together with the circumferential frame nail; axial end side edges and circumferential end side edges of the pipe segment body intersect and sequentially define a first corner point, a second corner point, a third corner point and a fourth corner point; a line connecting the first corner point and the second corner point is the axial end side edge; a line connecting the first corner point and the fourth corner point is the circumferential end side edge; a direction of a line connecting the first corner point and the third corner point is defined as a diagonal direction; the pipe segment further comprises an integrated connecting seat and a hole-equipped connecting piece; the first corner point is connected with the integrated connecting seat, and the integrated connecting seat is provided with the circumferential frame nail, the axial frame nail and a diagonal frame nail; the second corner point is connected with the hole-equipped connecting piece, and the hole-equipped connecting piece is provided with the circumferential insertion hole; the third corner point is connected with the hole-equipped connecting piece, and the hole-equipped connecting piece is provided with a diagonal insertion hole; and the fourth corner point is connected with the hole-equipped connecting piece, and the hole-equipped connecting piece is provided with the axial insertion hole; 2. The pipe section of claim 1, wherein a length of the diagonal frame nail is greater than a depth of the diagonal insertion hole, so that when the diagonal frame nail of a pipe segment is inserted into a diagonal insertion hole of another pipe segment located in the diagonal direction for connection, a part of the diagonal frame nail that penetrates out of the diagonal insertion hole is supported on the inner wall of the existing pipeline together with the circumferential frame nail and the axial frame nail. the integrated connecting seat comprises four connected positioning seats, one of which is connected at the first corner point, and the other three are respectively provided with the circumferential frame nail, the axial frame nail and the diagonal frame nail; the hole-equipped connecting piece is provided with a positioning counter-sink; 3. The pipe section of claim 1, wherein the positioning seats are used for clamping in the positioning counter-sink. a central frame nail is vertically fixed to a center of the outer arc surface of the pipe segment body; 4. The pipe section of claim 1, wherein the central frame nail is used for supporting on the inner wall of the existing pipeline and forming a grouting liquid filling space between the outer arc surface of the pipe segment body and the inner wall of the existing pipeline. the pipe segment body comprises a pipe segment frame and a concrete main body; The segmental skeleton is embedded in the concrete body and comprises first and second cross-arranged arc-shaped supports, the two ends of the first arc-shaped support are located at the first and third corner points of the segmental body, and the two ends of the second arc-shaped support are located at the second and fourth corner points of the segmental body.

5. A formwork for use in the segment of claim 4, wherein Comprise: Two oppositely arranged pouring plates, each being configured as an arc-shaped plate and arranged at the inner side and the outer side of the segmental skeleton respectively; Four sealing baffle strips, sealingly connecting the axial end sides between the two pouring plates and the circumferential end sides between the two pouring plates, the sealing baffle strips and the pouring plates surrounding a pouring space; One of the sealing baffle strips is provided with a pouring opening for pouring the pouring concrete into the pouring space to form the concrete body of the segment.

6. A rack pin length adjustment tool for use with the pipe segment of any one of claims 1-4, wherein, Comprise: Hot melting component, guide component, handle component and pointer; The guide component comprises two vertical plates and a connecting plate, the two vertical plates are oppositely arranged and define a guide channel, the first ends of the two vertical plates are connected by the connecting plate, the connecting plate is provided with a through hole for the handle component to pass through, and the second ends of the two vertical plates are spaced apart to form an opening communicating with the guide channel, the diameter of the opening is greater than the diameter of the skeleton nail; The hot melting component is slidably arranged in the guide channel, the handle component is connected with the hot melting component and located outside the guide channel to drive the hot melting component to slide, and the hot melting component is used for hot melting the skeleton nail to realize length adjustment; The vertical plate is provided with a strip-shaped groove extending in parallel to the direction of the guide channel, the strip-shaped groove penetrates through the thickness direction of the vertical plate, the pointer is slidably arranged on the strip-shaped groove and connected with the hot melting component; The strip-shaped groove is provided with a scale.

7. A method of pipe rehabilitation, characterized by, The steps comprise: S1: obtaining the inner wall profile of the existing pipeline by a scanning device to obtain a pipe segment to be repaired; S2: adjusting the lengths of the circumferential skeleton nails, the axial skeleton nails, the diagonal skeleton nails on the pipe segment and the length of the central skeleton nail on the pipe segment according to the pipe segment to be repaired by using a skeleton nail length adjusting tool, the pipe segment being the pipe segment according to any one of claims 1-4; S3: connecting the plurality of pipe segments in the circumferential direction, the axial direction and the diagonal direction, the circumferential skeleton nails, the axial skeleton nails, the diagonal skeleton nails and the central skeleton nail being commonly supported on the inner wall of the existing pipeline, until the pipe segment to be repaired is covered by the pipe segment assembled lining formed by connecting the plurality of pipe segments, and the pipe segment to be repaired and the outer arc surface of the pipe segment assembled lining are radially supported and spaced apart by the circumferential skeleton nails, the axial skeleton nails, the diagonal skeleton nails and the central skeleton nail to form a grouting liquid filling space; S4: grouting the grouting liquid filling space.

8. A method of pipe rehabilitation according to claim 7, wherein, The steps of connecting the plurality of pipe segments in the circumferential direction, the axial direction and the diagonal direction comprise: S31: connecting the plurality of pipe segments in the circumferential direction: the circumferential skeleton nail of one pipe segment is inserted into the circumferential insertion hole at the second corner point of the circumferentially adjacent pipe segment; S32: axially connecting the plurality of segments: the axial frame nail of one segment is inserted into the axial insertion hole at the fourth corner point of the axially adjacent segment; S33: diagonally connecting the plurality of segments: the diagonal frame nail of one segment is inserted into the diagonal insertion hole at the third corner point of the diagonally located another segment; In steps S31-S33, the circumferential frame nail, the axial frame nail and the diagonal frame nail pass through the corresponding insertion hole and are collectively supported on the inner wall of the existing pipeline.

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