Non-excavation construction concrete pipeline connecting joint

Abstract

The utility model relates to the technical field of engineering construction, in particular to a trenchless construction concrete pipeline connecting joint which comprises a first pipe body and a second pipe body. A protruding structure is arranged at the end of the first pipe body. An inner concave structure matched with the convex structure is arranged at the end part of the second pipe body; the convex structure and the concave structure form a concave-convex connecting pair, and the first pipe body and the second pipe body are connected in the axial direction through the concave-convex connecting pair; the concave-convex connecting pair is provided with an expansion assembly, a hot melting assembly and a bonding assembly. Through the design of the concave-convex connecting pair, the characteristic that the expansion assembly expands when meeting water and the blocking effect after the hot melting assembly is melted, the sealing performance of the pipeline connecting position is ensured from the inner side and the outer side, and leakage of liquid or gas is effectively prevented.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of engineering construction, in particular to a non-excavation construction concrete pipeline connecting joint. BACKGROUND

[0002] The non-excavation method has the advantages of fast construction speed and small disturbance to surrounding buildings and soil bodies, and has become a commonly used construction method in municipal engineering. The pipeline for back dragging is mostly made of PE pipe, PVC pipe or steel pipe. Some small-diameter sewage pipes are made of concrete pipes, but leakage or cracks and fractures often occur at the interfaces of the concrete pipes during back dragging, causing sewage to leak out and greatly affecting the surrounding soil bodies and environment. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a non-excavation construction concrete pipeline connecting joint to solve at least one technical problem in the prior art.

[0004] To solve the above technical problems, the application provides a non-excavation construction concrete pipeline connecting joint, which comprises a first pipe body and a second pipe body.

[0005] The end of the first pipe body is provided with a convex structure.

[0006] The end of the second pipe body is provided with an inner concave structure matched with the convex structure.

[0007] The convex structure and the inner concave structure form a concave-convex connecting pair, and the first pipe body and the second pipe body are connected in the axial direction through the concave-convex connecting pair.

[0008] The concave-convex connecting pair is provided with an expansion assembly, a hot melting assembly and a bonding assembly.

[0009] The expansion assembly is arranged at a gap on the side of the concave-convex connecting pair deviated from the inner cavity of the pipe body, and expands to block the linking gap of the concave-convex connecting pair after encountering water.

[0010] The hot melting assembly is arranged at a gap on the side of the concave-convex connecting pair deviated from the outside of the pipe body, and connects and cools and solidifies the concave-convex connecting pair after being heated and melted.

[0011] The bonding assembly is arranged at the opposite position of the concave-convex connecting pair, and the bonding assembly adheres the convex structure and the inner concave structure to each other after the concave-convex connecting pair is connected.

[0012] Further, the convex structure is a plurality of convex blocks arranged in the circumferential direction of the first pipe body.

[0013] The inner concave structure is a pit-shaped groove body arranged opposite to the convex structure.

[0014] Further, the convex structure is a ring-shaped convex block coaxial with the first pipe body.

[0015] The concave structure is a ring-shaped concave block arranged opposite to the convex structure.

[0016] Further, the cross section of the convex structure is trapezoidal, so as to avoid the expansion assembly and the hot melt assembly being scratched when the convex-concave connecting pair is connected.

[0017] Further, the expansion assembly is a waterstop expansion adhesive patch.

[0018] The waterstop expansion adhesive patch is arranged on the convex structure in an initial state.

[0019] When the convex-concave connecting pair is connected, the side of the waterstop adhesive patch away from the convex structure abuts against the side wall of the concave structure.

[0020] The waterstop expansion adhesive patch expands when encountering water, so as to fill the gap of the convex-concave connecting pair, thereby realizing the closed connection of the first pipe body and the second pipe body.

[0021] Further, the hot melt assembly comprises a solid butyl rubber layer, a heating coil and a heating power source.

[0022] The butyl rubber layer is arranged on the convex structure in an initial state.

[0023] The heating coil is arranged in the butyl rubber layer or on the surface of the butyl rubber layer, and the two ends of the heating coil are electrically connected with the heating power source.

[0024] When the heating power source is turned on, the heating coil generates heat energy to melt the butyl rubber layer, at this time, the convex-concave connecting pair is connected, and the butyl rubber layer in a molten state fills and blocks the gap between the convex structure and the concave structure, and after the butyl rubber layer cools and solidifies, the convex structure and the concave structure are sealed and bonded through the butyl rubber layer.

[0025] Further, the bonding assembly comprises a reserved steel bar, a reserved hole, A glue and B glue.

[0026] The reserved steel bar is arranged in the concave structure, and the reserved hole is arranged on the convex structure.

[0027] A glue and B glue are respectively applied on the reserved steel bar and the reserved hole, and when the reserved steel bar is inserted into the reserved hole, A glue and B glue contact each other to react chemically, so that the reserved steel bar is bonded in the reserved hole.

[0028] Further, the first pipe body and the second pipe body are provided with flanges;

[0029] The first pipe body and the second pipe body are connected through the concave-convex connection pair, and then the flanges are connected through fasteners.

[0030] Further, the second pipe body is further provided with a male joint;

[0031] After the first pipe body and the second pipe body are connected, the male joint is filled with epoxy resin, so as to seal the connection between the first pipe body and the second pipe body.

[0032] Further, the male joint is fixedly arranged on the second pipe body or movably arranged on the second pipe body in an initial state. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0035] Figure 2 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1. Figure 1 It is an enlarged view of A in FIG. 1.

[0036] Figure 3 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1. Figure 1 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0037] Figure 4 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0038] Figure 5 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0039] Figure 6 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0040] Figure 7 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0041] Figure 8 It is a sectional view of the connection node of the non-excavation construction concrete pipe in Example 1.

[0042] Figure 9Structure diagram of pipe end with hot melt assembly and before installation of lug joint

[0043] Figure 10 Structure diagram of pipe end with hot melt assembly and after installation of lug joint

[0044] Figure 11 Structure diagram of pipe end with flange and before installation of lug joint

[0045] Figure 12 Structure diagram of pipe end with flange and after installation of lug joint

[0046] Figure 13 Structure diagram of pipe end with water stop steel ring and before installation of lug joint

[0047] Figure 14 Structure diagram of pipe end with water stop steel ring, hoop and tie ring buckle

[0048] Figure 15 Structure diagram of pipe end with tie ring buckle

[0049] Figure 16 Structure diagram of pipe end with water stop steel ring and after installation of lug joint

[0050] Figure 17 Structure diagram of pipe end with reserved steel bar and before installation of lug joint

[0051] Figure 18 Structure diagram of pipe end with reserved steel ring and after installation of lug joint

[0052] Figure 19 Structure diagram of pipe end with extension joint and before installation of lug joint

[0053] Figure 20 Structure diagram of pipe end with extension joint and after installation of lug joint

[0054] Reference signs:

[0055] 1 - first pipe body; 2 - second pipe body; 3 - protruding structure; 4 - concave structure; 5 - concave-convex connecting pair; 6 - expansion assembly; 7 - hot melt assembly; 8 - bonding assembly; 9 - water stop expansion adhesive sheet; 10 - butyl rubber layer; 11 - heating coil; 12 - heating power supply; 13 - reserved steel bar; 14 - reserved hole; 15 - A glue; 16 - B glue; 17 - flange; 18 - lug joint; 19 - first joint; 20 - second joint; 21 - pin hole; 22 - back drilling rod; 23 - lock; 24 - water stop steel ring; 25 - embedded steel; 26 - hoop; 27 - tie ring buckle; 28 - adjustable nut; 29 - tie ring sleeve. DETAILED DESCRIPTION

[0056] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0057] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connection” should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0059] It should also be noted that the following specific embodiments or specific implementation manners are a series of optimized setting modes listed by the present application to further explain the specific application contents, and these setting modes can be used in combination with or in relation to each other.

[0060] The present application will be further explained below in conjunction with the specific implementation manners.

[0061] Embodiment 1

[0062] As shown in the drawings, the non-excavation construction concrete pipeline connecting node provided by the present embodiment comprises a first pipe body 1 and a second pipe body 2; Figures 1-2 The end of the first pipe body 1 is provided with a protruding structure 3;

[0063] The end of the second pipe body 2 is provided with an inner recess structure 4 matched with the protruding structure 3;

[0064]

[0065] ​The convex structure 3 and the concave structure 4 form a concave-convex connecting pair 5, through which the first pipe body 1 and the second pipe body 2 are connected in the axial direction;

[0066] The concave-convex connecting pair 5 is provided with an expansion assembly 6, a hot-melt assembly 7 and a bonding assembly 8;

[0067] The expansion assembly 6 is arranged at a gap on the side of the concave-convex connecting pair 5 deviated to the inner cavity of the pipe body, and expands to block the connecting gap of the concave-convex connecting pair 5 after encountering water;

[0068] The hot-melt assembly 7 is arranged at a gap on the side of the concave-convex connecting pair 5 deviated to the outside of the pipe body, and connects and cools and solidifies the concave-convex connecting pair 5 after being heated and melted;

[0069] The bonding assembly 8 is arranged at the opposite position of the concave-convex connecting pair 5, and bonds the convex structure 3 and the concave structure 4 to each other after the concave-convex connecting pair 5 is connected.

[0070] As a further implementation manner of the embodiment, the convex structure 3 is a plurality of convex blocks arranged in the circumferential direction of the first pipe body 1;

[0071] The concave structure 4 is a pit-shaped groove arranged opposite to the convex structure 3.

[0072] As a further implementation manner of the embodiment, the convex structure 3 is a ring-shaped convex block coaxial with the first pipe body 1;

[0073] The concave structure 4 is a ring-shaped groove arranged opposite to the convex structure 3.

[0074] As a further implementation manner of the embodiment, the cross section of the convex structure 3 is trapezoidal, which is used to avoid the expansion assembly 6 and the hot-melt assembly 7 being scraped when the concave-convex connecting pair 5 is connected.

[0075] As a further implementation manner of the embodiment, the expansion assembly 6 is a water-stop expansion adhesive patch 9;

[0076] The water-stop expansion adhesive patch 9 is initially arranged on the convex structure 3 by adhesion;

[0077] When the concave-convex connecting pair 5 is connected, the side of the water-stop adhesive patch away from the convex structure 3 abuts against the side wall of the concave structure 4;

[0078] The water-stop expansion adhesive patch 9 expands when encountering water, thereby filling the gap of the concave-convex connecting pair 5, so as to realize the closed connection of the first pipe body 1 and the second pipe body 2.

[0079] As a further implementation of the embodiment, the hot-melt assembly 7 comprises a solid butyl rubber layer 10, a heating coil 11 and a heating power supply 12;

[0080] The butyl rubber layer 10 is arranged on the protruding structure 3 in the initial state;

[0081] The heating coil 11 is arranged in or on the surface of the butyl rubber layer 10, and the two ends of the heating coil 11 are electrically connected to the heating power supply 12;

[0082] When the heating power supply 12 is turned on, the heating coil 11 generates heat to melt the butyl rubber layer 10, so that the protrusion-recess connection pair 5 is connected, and the butyl rubber layer 10 in the molten state fills the gap between the protruding structure 3 and the recessed structure 4. After the butyl rubber layer 10 cools and solidifies, the protruding structure 3 and the recessed structure 4 are sealed and bonded by the butyl rubber layer 10.

[0083] As a further implementation of the embodiment, the bonding assembly 8 comprises a reserved steel bar 13, a reserved hole 14, an A glue 15 and a B glue 16;

[0084] The reserved steel bar 13 is arranged in the recessed structure 4, and the reserved hole 14 is arranged on the protruding structure 3;

[0085] The reserved steel bar 13 and the reserved hole 14 are respectively coated with the A glue 15 and the B glue 16. When the reserved steel bar 13 is inserted into the reserved hole 14, the A glue 15 and the B glue 16 come into contact with each other to react chemically, so that the reserved steel bar 13 is bonded in the reserved hole 14.

[0086] As a further implementation of the embodiment, the first pipe body 1 and the second pipe body 2 are respectively provided with a flange plate 17;

[0087] After the protrusion-recess connection pair 5 of the first pipe body 1 and the second pipe body 2 is connected, the flange plates 17 are connected by fasteners.

[0088] The non-excavation construction concrete pipeline connecting node disclosed in the application is provided with a concave-convex connecting pair 5 at the end of two adjacent pipe bodies (a first pipe body 1 and a second pipe body 2) in actual work, which is preferably an integral annular convex block and an annular inner recess in the embodiment. In order to increase the sealing and stability of the connecting node, an expansion assembly 6, a hot melt assembly 7 and a bonding assembly 8 are further provided on the concave-convex connecting pair 5. The expansion assembly 6 is a waterproof expansion adhesive sheet 9 attached to the inner side wall of the outer convex structure, and the outer side of the outer convex structure is provided with a butyl rubber layer 10 and is wound with a heating coil 11. When the integral annular convex block is used in the embodiment, the heating coil 11 can be directly wound on the outer convex structure as a whole, compared with the multiple outer convex structures, the embodiment does not need to wind the multiple outer convex structures respectively and provide multiple heating power sources 12, but only one heating power source 12 is needed. The waterproof expansion adhesive sheet 9 expands to fill the gap between the concave-convex connecting pair 5, ensuring good sealing, and the hot melt assembly 7 tightly connects the concave-convex connecting pair 5 through the molten butyl rubber layer 10 and realizes sealing from another direction, so that the concave-convex connecting pair 5 has good sealing performance on the inner and outer sides. The setting of the bonding assembly 8 makes the first pipe body 1 and the second pipe body 2 unable to move relatively in the axial direction, and in addition, the setting of AB glue 16 on the reserved steel bars 13 and the reserved holes 14 can also increase the contact range of the AB glue 16, further improving the stability of the bonding. In addition, the reserved steel bars 13 and the reserved holes 14 also play a positioning role, and after the reserved steel bars 13 and the reserved holes 14 are oppositely inserted in actual construction, the external flange plate 17 is directly aligned, which is convenient for the positioning and installation between the flange plates 17.

[0089] The non-excavation construction concrete pipe connection node disclosed in this application involves pre-fabricating a convex-concave connector 5 during construction. A water-stopping expansion adhesive patch 9 is pasted on the inner wall of the convex structure. A butyl rubber layer 10 is placed on the outer wall and a heating coil 11 is wrapped around it. A glue 15 and B glue 16 are applied to the reserved reinforcing bars 13 and reserved holes 14, respectively. The heating coil 11 is heated by the heating power supply 12, causing the butyl rubber layer 10 to start heating. When the butyl rubber layer 10 partially melts, the heating power supply 12 is turned off and the heating coil 11 is disconnected. The convex-concave connector 5 is then connected. At this time, the butyl rubber layer 10 continues to melt under the residual heat of the heating coil 11 and then cools and solidifies. The A and B glues 16 come into contact and undergo a chemical reaction. Furthermore, the residual heat from the butyl rubber layer 10 is conducted to the AB adhesive 16, accelerating the curing reaction and shortening the curing time (the curing time of AB adhesive 16 is typically around 24 hours at 25 degrees Celsius, while at 40 degrees Celsius, it typically reaches a certain degree of curing in less than 12 hours). This improves the overall construction progress without requiring an additional heat source. Finally, the flange 17 is connected using fasteners, thus completing the installation of the node.

[0090] By adopting the above technical solution, this application has the following beneficial effects:

[0091] (1) Through the design of the concave-convex connection pair 5, combined with the expansion component 6 (such as the water-stopping expansion adhesive patch 9) which expands when exposed to water, and the filling effect of the hot melt component 7 (such as the butyl rubber layer 10) after melting, the sealing of the pipe connection is ensured from both the inside and outside, effectively preventing the leakage of liquid or gas.

[0092] (2) The setting of bonding components 8 (such as AB glue 16 and reserved steel bars 13 / holes) increases the mechanical strength of the pipe connection, making it impossible for the two pipes to move relative to each other in the axial direction, thus improving the stability and durability of the overall structure.

[0093] (3) The overall annular protrusion design reduces the number of heating coils 11 and heating power supplies 12, making construction more convenient. At the same time, the residual heat of the butyl rubber layer 10 is used to accelerate the curing reaction of AB glue 16, shortening the construction cycle and improving work efficiency.

[0094] (4) The positioning function of the reserved steel bar 13 and the reserved hole 14 also facilitates the installation and positioning of the flange 17.

[0095] Example 2

[0096] like Figures 1-2 As shown, the trenchless construction concrete pipe connection node provided in this embodiment differs from that in embodiment 1 in that the second pipe body 2 is also provided with a protruding joint 18.

[0097] After the first pipe body 1 is connected with the second pipe body 2, the socket joint 18 is filled with epoxy resin, so as to unseal the connection between the first pipe body 1 and the second pipe body 2.

[0098] As a further implementation of the embodiment, the socket joint 18 is fixedly arranged on the second pipe body 2 or movably arranged on the second pipe body 2 in the initial state.

[0099] The embodiment can be combined with other embodiments or replace part of the technical solutions of other embodiments, for example, for embodiment 1, the embodiment can replace the structure of the flange plate 17 in embodiment 1.

[0100] By using the above technical solutions, the application has the following beneficial effects:

[0101] (1) By arranging the socket joint 18 on the second pipe body 2 and filling the epoxy resin after connection, an additional sealing layer is provided for the connection between the first pipe body 1 and the second pipe body 2. The epoxy resin has excellent adhesion and sealing properties, which can effectively prevent liquid or gas from leaking from the connection, thereby enhancing the sealing reliability of the entire pipeline system.

[0102] (2) The socket joint 18 and the epoxy resin filling inside it not only enhance the sealing property, but also improve the connection strength between the first pipe body 1 and the second pipe body 2 by increasing the connection area and providing additional mechanical support. This helps to resist external pressure, vibration and displacement, ensuring the stability and safety of the pipeline system.

[0103] (3) The socket joint 18 can be fixedly arranged on the second pipe body 2 or movably arranged according to needs. This flexibility makes the technical solution adaptable to different construction conditions and pipeline layout requirements, improving the convenience and efficiency of construction.

[0104] Embodiment 3

[0105] As shown in Figures 1-2 The embodiment provides a non-excavation construction concrete pipeline connection node, which comprises a first joint 19, a second joint 20 and a pin hole 21.

[0106] The first joint 19 and the second joint 20 are arranged on the first pipe body 1 and the second pipe body 2 respectively.

[0107] One or more pin holes 21 are arranged on the first joint 19 and the second joint 20.

[0108] When the first pipe body 1 is connected with the second pipe body 2, the pin holes 21 of the first joint 19 and the second joint 20 are coincided, the first joint 19 and the second joint 20 are connected by setting the pin in the pin hole 21, so that the connection between the first pipe body 1 and the second pipe body 2 is realized.

[0109] With the above technical scheme, the present application has the following beneficial effects:

[0110] (1) The cooperation of the pin hole 21 and the pin ensures the firm connection between the first pipe body 1 and the second pipe body 2, and improves the structural stability and safety of the entire pipeline system.

[0111] (2) The joint is simple and clear in design, the pin is easy to install and disassemble, the construction difficulty is reduced, and the installation efficiency is improved.

[0112] Embodiment 4

[0113] As shown in the figure, the non-excavation construction concrete pipeline connecting node provided in the embodiment comprises a back- pulling drill rod 22 and a lock 23; Figures 1-2

[0114] The concrete pipeline is connected with the lock 23 at one end, and the back-pulling drill rod 22 is arranged on the lock 23.

[0115] The back-pulling drill rod 22 penetrates the concrete pipeline, and the end thereof extends out of the concrete pipeline on the other side; by pulling a plurality of back-pulling drill rods 22, the lock 23 drives the concrete pipelines to move and approach each other, so that the connection between the concrete pipelines is realized.

[0116] Embodiment 5

[0117] As shown in the figure, the non-excavation construction concrete pipeline connecting node provided in the embodiment comprises a water stop steel ring 24, a pre-buried steel 25 and a hoop 26; Figures 1-2

[0118] The water stop steel ring 24 is arranged at the connecting end of the first pipe body 1 and the second pipe body 2.

[0119] The pre-buried steel 25 is buried at the lower end of the water stop steel ring 24.

[0120] The hoop 26 is arranged outside the water stop steel ring 24, and the hoop 26 is provided with a pull ring buckle 27.

[0121] The pull ring buckle 27 comprises an adjustable nut 28 and a pull ring sleeve 29.

[0122] ​​The pull ring sleeve 29 is arranged at both ends of the pull ring buckle 27 and is connected with the pre-embedded steel 25 arranged on the first pipe body 1 and the second pipe body 2 respectively.

[0123] The length of the pull ring buckle 27 is changed by adjusting the adjustable nut 28, so that the mutual approaching stress between the pre-embedded steel 25 is generated, thereby connecting the first pipe body 1 and the second pipe body 2.

[0124] By adopting the technical scheme, the present application has the following beneficial effects:

[0125] (1) The arrangement of the water stop steel ring 24 effectively prevents water leakage from the pipe connection, improves the overall sealing performance of the pipe system, and ensures the stable operation of the underground pipe network.

[0126] (2) By using the pre-embedded steel 25 and the hoop 26 in cooperation, and the adjustability of the pull ring buckle 27, the tight connection between the pipes is realized, and the strength and stability of the connection node are enhanced.

[0127] (3) When the pipe needs to be maintained or replaced, the pipe can be easily separated by adjusting the pull ring buckle 27, reducing the complexity and cost of maintenance work, and improving the maintenance efficiency.

[0128] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A trenchless construction concrete pipe joint node, characterized by, The first pipe body and the second pipe body are connected in the axial direction through a male-female connection pair formed by a convex structure of the first pipe body and an inner recess structure of the second pipe body. The end of the first pipe body is provided with a convex structure. The end of the second pipe body is provided with an inner recess structure matched with the convex structure. The convex structure and the inner recess structure form a male-female connection pair, and the first pipe body and the second pipe body are connected in the axial direction through the male-female connection pair. The male-female connection pair is provided with an expansion assembly, a hot melt assembly and a bonding assembly. The expansion assembly is arranged at a gap on the side of the male-female connection pair deviated from the inner cavity of the pipe body, and expands to block the linking gap of the male-female connection pair after encountering water. The hot melt assembly is arranged at a gap on the side of the male-female connection pair deviated from the outside of the pipe body, and connects and cools and solidifies the male-female connection pair after melting by heating. The bonding assembly is arranged at the opposite position of the male-female connection pair, and the convex structure and the inner recess structure are mutually adhered after the male-female connection pair is connected.

2. The trenchless construction concrete pipe joint node of claim 1, wherein, The convex structure is a plurality of convex blocks arranged in the circumferential direction of the first pipe body. The inner recess structure is a pit-shaped groove body arranged opposite to the convex structure.

3. The trenchless construction concrete pipe joint node of claim 1, wherein, The convex structure is a coaxial annular convex block of the first pipe body. The inner recess structure is a ring-shaped groove body arranged opposite to the convex structure.

4. The trenchless construction concrete pipe joint node of claim 1, wherein, The cross section of the convex structure is trapezoidal, which is used to avoid the expansion assembly and the hot melt assembly being scraped when the male-female connection pair is connected.

5. The trenchless construction concrete pipe joint node of claim 1, wherein, The expansion assembly is a waterproof expansion adhesive patch. The waterproof expansion adhesive patch is adhered to the convex structure in the initial state. When the male-female connection pair is connected, the side of the waterproof adhesive patch away from the convex structure abuts against the side wall of the inner recess structure. The waterproof expansion adhesive patch expands to fill the gap of the male-female connection pair when encountering water, thereby realizing the closed connection of the first pipe body and the second pipe body.

6. The trenchless construction concrete pipe joint node of claim 1, wherein, The hot melt assembly includes a solid butyl rubber layer, a heating coil and a heating power source. The butyl rubber layer is arranged on the convex structure in the initial state. The heating coil is arranged in the butyl rubber layer or on the surface of the butyl rubber layer, and the two ends of the heating coil are electrically connected with the heating power source. When the heating power source is turned on, the heating coil generates heat to melt the butyl rubber layer, thereby connecting the male-female connection pair, filling and blocking the gap between the convex structure and the inner recess structure, and sealing and bonding the convex structure and the inner recess structure through the butyl rubber layer after the butyl rubber layer cools and solidifies.

7. The trenchless construction concrete pipe joint node of claim 1, wherein, The bonding assembly includes a reserved steel bar, a reserved hole, A glue and B glue. The reserved steel bar is arranged in the inner recess structure, and the reserved hole is arranged on the convex structure. A and B glues are respectively applied on the reserved steel bar and the reserved hole, and the reserved steel bar is inserted into the reserved hole, so that the A glue and the B glue are in contact with each other to react chemically, thereby bonding the reserved steel bar in the reserved hole.

8. The trenchless construction concrete pipe joint node of claim 1, wherein, The first pipe body and the second pipe body are both provided with flanges. The flanges are connected through fasteners after the male-female connection pair of the first pipe body and the second pipe body is connected.

9. The trenchless construction concrete pipe joint node of claim 1, wherein, The second pipe body is also provided with a male joint. After the first pipe body is connected with the second pipe body, the socket joint is filled with epoxy resin, so that the connection between the first pipe body and the second pipe body is sealed.

10. The trenchless construction concrete pipe joint node of claim 9, wherein, In the initial state, the socket joint is fixedly arranged on the second pipe body or movably arranged on the second pipe body.

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