Multi-layer waterproof pipeline connecting piece and connecting structure for municipal pipe jacking engineering

Abstract

The utility model discloses a multi-layer waterproof pipeline connecting piece for municipal pipe jacking engineering and a connecting structure. The connecting piece comprises an inner connecting cylinder, bolt penetrating holes are formed in the two ends of the inner connecting cylinder, an outer filling ring with a rectangular section is arranged on the outer side of the middle of the inner connecting cylinder, and elastic locking teeth protruding out of the surface are arranged on the outer sides of the two ends of the outer filling ring. The connecting structure comprises a first pipe section and a second pipe section and further comprises the multi-layer waterproof pipeline connecting piece for the municipal pipe jacking engineering, the two ends of the inner connecting cylinder are attached to the inner wall face of the first pipe section and the inner wall face of the second pipe section correspondingly, and the two ends of the inner connecting cylinder are connected with the first pipe section and the second pipe section through fastening bolts in bolt penetrating holes correspondingly; filling ring grooves are formed in the inner sides of the end faces of the first pipe section and the second pipe section, the outer filling rings are located in the filling ring grooves, and locking tooth ring grooves matched with the elastic locking teeth are formed in the corners of the two ends of each filling ring groove. The method has the beneficial effects that the deformation resistance is high; the multilayer waterproof performance is reliable; the construction is convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of municipal engineering pipeline construction, and particularly relates to a multi-layer waterproof pipeline connecting piece and connecting structure for municipal pipe-jacking engineering. BACKGROUND

[0002] In the construction of urban underground pipe network, pipe-jacking construction method is widely used in water supply and drainage, power tunnel and other engineering due to its non-excavation advantage. The interface connection quality of the concrete pipeline as a key component directly affects the engineering safety. In the traditional pipe-jacking construction, the pipe sections are connected by single-layer socket joint or bolt fastening mode, which has the following problems: poor connection stability: the ordinary socket joint only relies on the interface occlusion, and is easy to be dislocated due to external force or foundation settlement; insufficient waterproof performance: the single sealing structure is easy to age and leak in long-term use; low installation efficiency: the construction positioning is difficult, and the fasteners and sealing elements need to be installed in steps, and the process is complex.

[0003] Therefore, the utility model provides a kind of through card slot and steel mixed U-shaped connecting piece synergistic effect realizes stable connection and the like problems. UTILITY MODEL CONTENT

[0004] The application aims to provide a multi-layer waterproof pipeline connecting piece and connecting structure for municipal pipe-jacking engineering, which realizes stable connection and effective waterproof through the synergistic effect of the filling groove and the steel mixed U-shaped connecting piece, and solves the problems of poor connection stability, insufficient waterproof performance and low installation efficiency in traditional pipe-jacking construction.

[0005] The purpose of the application is achieved by the following technical solutions:

[0006] A multi-layer waterproof pipeline connecting piece for municipal pipe-jacking engineering, comprising an inner connecting cylinder, both ends of the inner connecting cylinder are provided with bolt through holes, the outer side of the middle part of the inner connecting cylinder is provided with an outer filling ring with a rectangular cross section, and the outer side of both ends of the outer filling ring is provided with elastic locking teeth with a convex surface.

[0007] Further, the inner connecting cylinder is a hot-dip galvanized steel plate.

[0008] Further, the outer filling ring is made of concrete material.

[0009] Further, the inner connecting cylinder and the outer filling ring are fixed by adhesive or anchored.

[0010] Further, the elastic locking teeth are made of rubber material.

[0011] Further, the elastic locking teeth are of rectangular cross section.

[0012] Further, the outer filling ring and the elastic locking teeth are fixed by adhesive.

[0013] Further, the outer filling ring is provided with a water stop groove in the middle outer side.

[0014] The application discloses a multi-layer waterproof pipe connecting structure for municipal pipe jacking engineering.

[0015] Further, the end surface of the first pipe section is provided with an L-shaped socket groove in the outer side, and the end surface of the second pipe section is provided with an L-shaped socket head in the inner side.

[0016] Further, the water stop groove in the middle outer side of the outer filling ring is provided with an expansion water stop, and the expansion water stop is opposite to the gap between the pipe section end surfaces.

[0017] Further, the expansion water stop is in a trapezoidal section, and the water stop groove is in interference fit with the expansion water stop.

[0018] The application has the following beneficial effects:

[0019] (1) Strong anti-deformation capability: the filling groove and the steel-mix connecting piece form a stepped embedding, and the shear stress is dispersed.

[0020] (2) Reliable multi-layer waterproof: the water stop is expanded to fill the gap under pressure, and the rubber material lock tooth and the steel-mix composite structure are combined to be self-waterproof, thereby forming multiple seals.

[0021] (3) Convenient construction: after the socket is pre-positioned, only one bolt fastening is needed to complete the connection, and the assembly time is greatly shortened.

[0022] The foregoing main scheme and each further selected scheme of the application can be freely combined to form multiple schemes, and all the schemes are the schemes that can be adopted and claimed by the application; and the application can be freely combined between (each non-conflict selection) selections and other selections. A person skilled in the art can understand that there are multiple combinations according to the prior art and common knowledge after understanding the scheme, and all the combinations are the technical schemes claimed by the application, and are not listed exhaustively. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the connecting piece of the application.

[0024] Figure 2 It is a structural schematic view of the connecting structure of the application.

[0025] In the figure: 1 - inner connecting cylinder, 2 - bolt hole, 3 - outer filling ring, 4 - elastic lock tooth, 5 - sealing strip groove, 6 - first pipe section, 7 - second pipe section, 8 - fastening bolt, 9 - filling ring groove, 10 - lock tooth ring groove, 11 - socket groove, 12 - socket head, 13 - expansion sealing strip. DETAILED DESCRIPTION

[0026] The application will be further described below in conjunction with specific examples and drawings.

[0027] Example 1

[0028] Reference Figure 1 As shown in the figure, a multi-layer waterproof pipe connecting piece for municipal pipe jacking engineering includes an inner connecting cylinder 1, an outer filling ring 3, and an elastic lock tooth 4.

[0029] The inner connecting cylinder 1 is a ring-shaped steel plate for internal blocking protection and connection and fixation. Both ends of the inner connecting cylinder 1 are provided with bolt holes 2, and fastening bolts 8 are arranged through the bolt holes 2 to fix the inner connecting cylinder 1 and the pipe section, thereby connecting the adjacent two pipe sections into one.

[0030] The outer filling ring 3 with a rectangular cross section is arranged on the outer side of the middle part of the inner connecting cylinder 1, and the outer filling ring 3 is used for external filling and blocking and provides a mounting base for the elastic lock tooth 4.

[0031] The elastic lock tooth 4 with a convex surface is arranged on the outer side of both ends of the outer filling ring 3. When entering, the elastic lock tooth 4 is compressed, and after entering, it deforms and restores to tightly adhere to the pipe section. First, the elastic lock tooth 4 and the outer filling ring 3 form a U-shaped structure to form a clamping and limiting relationship, and the two ends are embedded in the lock tooth ring groove to form a shear-resistant splicing to improve the locking effect. Second, it is used to block the gap between the outer filling ring 3 and the pipe section to improve the waterproof effect and achieve waterproof through physical sealing (compression and deformation recovery).

[0032] The inner connecting cylinder 1 is a hot-dip galvanized Q235 material steel plate to ensure its anti-corrosion effect underground. The thickness of the inner connecting cylinder 1 is 4-6 mm, the length of the inner connecting cylinder 1 steel plate is greater than the long side of the outer filling ring 3, the two ends of the inner connecting cylinder 1 extend beyond the long side of the outer filling ring 3 by 80-100 mm, and a Φ18 hole is arranged as a bolt hole 2.

[0033] The outer filling ring 3 is made of concrete material, which can also be made of reinforced concrete material, and is used to match the filling ring groove for filling and blocking to achieve the waterproof effect. The inner connecting cylinder 1 and the outer filling ring 3 are fixed by an adhesive (high-strength epoxy resin adhesive) or by an anchor bolt to achieve firm connection between the two.

[0034] The elastic lock tooth 4 is made of rubber material, such as ethylene-propylene-diene rubber, nitrile rubber, etc. The elastic lock tooth 4 is of rectangular cross section, which is convenient for processing and manufacturing, and is also conducive to forming a waterproof and water-blocking structure. The outer filling ring 3 and the elastic lock tooth 4 are fixed by an adhesive (high-strength epoxy resin adhesive).

[0035] The outer filling ring 3 is provided with a water stop groove 5 on the outer side of the middle part, which is used to accommodate the expansion water stop 13 to block the gap between the pipe section end faces.

[0036] Embodiment 2

[0037] Reference Figure 2 As shown in the drawings, a multi-layer waterproof pipe connecting structure for municipal pipe-jacking engineering includes a first pipe section 6 and a second pipe section 7, and also includes the above-mentioned multi-layer waterproof pipe connecting piece for municipal pipe-jacking engineering.

[0038] The two ends of the inner connecting cylinder 1 are respectively attached to the inner wall surfaces of the first pipe section 6 and the second pipe section 7. The two ends of the inner connecting cylinder 1 are connected to the first pipe section 6 and the second pipe section 7 through the fastening bolts 8 in the bolt through holes 2. The inner connecting cylinder 1 achieves waterproof blocking between the pipe sections on the inner side, and fixes and connects the two pipe sections as a whole through the inner connecting cylinder 1.

[0039] The end faces of the first pipe section 6 and the second pipe section 7 are respectively provided with filling ring grooves 9, and the filling ring grooves 9 of the first pipe section 6 and the second pipe section 7 are arranged in left-right structural symmetry. The outer filling ring 3 is located in the filling ring groove 9, and the outer filling ring 3 and the filling ring groove 9 are a shape-matched structure, i.e., the filling ring groove 9 is also of rectangular cross section, which achieves the blocking and waterproof of the outer filling ring 3 on the outer side, and provides a placement basis for the elastic lock tooth 4. The depths of the two sides of the filling ring groove 9 are not less than 1 / 2 of the wall thickness of the pipe section.

[0040] The corners at the two ends of the filling ring groove 9 are provided with lock tooth ring grooves 10 matched with the elastic lock tooth 4, i.e., the lock tooth ring grooves 10 are also of rectangular cross section. Before the elastic lock tooth 4 enters the lock tooth ring groove 10, it is compressed and deformed, and after entering the lock tooth ring groove 10, it restores to its original shape. This is used to form a blocking and sealing relationship between the outer filling ring 3 and the pipe section, and also can form a clamping and limiting relationship, thereby improving the connection strength of the connecting piece.

[0041] The end face of the first pipe section 6 is provided with an L-shaped socket groove 11, and the end face of the second pipe section 7 is provided with an L-shaped socket head 12. The socket groove 11 and the socket head 12 are matched. When the pipe sections are spliced, the socket groove 11 and the socket head 12 are matched to realize the butt joint of the pipe section socket to the adjacent pipe section, form a preliminary connection, and perform preliminary axial limiting.

[0042] The expansion waterstop 13 is arranged in the waterstop groove 5 in the middle of the outer side of the outer filling ring 3, and is opposite to the gap between the pipe sections, and blocks the gap between the pipe sections from the outermost side. The expansion waterstop 13 has a trapezoidal cross section, and the waterstop groove 5 is in interference fit with the expansion waterstop 13. After being installed in place, the expansion waterstop 13 is pressed to completely fill the groove, thereby ensuring the water blocking effect.

[0043] The connecting step of the embodiment is as follows: 1. The L-shaped socket groove 11 of the first pipe section is aligned with the L-shaped socket plug 12 of the second pipe section and inserted, to form a preliminary connection; 2. The expansion waterstop is pressed into the trapezoidal groove, and then the steel-mix U-shaped connecting piece is embedded into the locking tooth ring groove of the pipe section at both ends to form self-locking; 3. The connecting steel plate anchor bolt hole is aligned with the pre-buried bolt hole, and the nut is tightened to a torque of 30 N·m, to complete the connection.

[0044] The advantages of the embodiment are as follows: (1) composite sealing and waterproof strengthening active sealing mechanism: the rubber material is tightly fitted with the locking tooth ring groove through pre-compression deformation, to form a waterproof barrier, and to jointly build a three-level waterproof system with the expansion waterstop and the steel plate. (2) Dynamic sealing reliability: even if the pipeline has a micro displacement, the elastic restoring force of the rubber can still maintain the contact surface pressure, to prevent the formation of a leakage path. (3) The flexible nature of the rubber allows for a small axial deviation when the pipe sections are butted, to reduce the installation precision requirement and to speed up the jacking construction efficiency. (4) Maintenance-free design: the durability of the rubber and steel-mix composite structure is matched, to reduce the frequency of later leakage maintenance. (5) Material synergistic effect: through rigid-flexible composite design, the steel and concrete usage is reduced while the bearing capacity is ensured, to realize lightweight and cost optimization.

[0045] The foregoing basic examples and further selected examples of the present application can be freely combined to form a plurality of embodiments, all of which are embodiments that can be used and claimed by the present application. In the present application scheme, each selected example can be arbitrarily combined with any basic example and selected example.

[0046] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-layer waterproof pipe connecting piece for municipal pipe jacking engineering, comprising an inner connecting cylinder (1), characterized in that: Both ends of the inner connecting cylinder (1) are provided with bolt through holes (2), and the outer side of the middle part of the inner connecting cylinder (1) is provided with an outer filling ring (3) with a rectangular cross section, and the outer side of both ends of the outer filling ring (3) is provided with elastic locking teeth (4) with a convex surface.

2. The multi-layered waterproof pipe joint for municipal pipe jacking engineering according to claim 1, characterized in that: The inner connecting cylinder (1) is a hot-dip galvanized steel plate; the outer filling ring (3) is made of concrete material; and the inner connecting cylinder (1) and the outer filling ring (3) are fixed by an adhesive or by an anchor bolt.

3. The multi-layered waterproof pipe joint for municipal pipe jacking engineering according to claim 1, characterized in that: The elastic locking teeth (4) are made of rubber material.

4. The multi-layered waterproof pipe joint for municipal pipe jacking engineering according to claim 1 or 3, characterized in that: The elastic locking teeth (4) are of a rectangular cross section.

5. The multi-layered waterproof pipe joint for municipal pipe jacking engineering according to claim 1 or 3, characterized in that: The outer filling ring (3) and the elastic locking teeth (4) are fixed by an adhesive.

6. The multi-layered waterproof pipe joint for municipal pipe jacking engineering according to claim 1, characterized in that: The outer side of the middle part of the outer filling ring (3) is provided with a water stop groove (5).

7. A multi-layer waterproof pipe connecting structure for municipal pipe jacking engineering, comprising a first pipe section (6) and a second pipe section (7), characterized in that: The application further comprises the multi-layer waterproof pipe connecting piece for municipal pipe jacking engineering as claimed in any one of claims 1-6, the two ends of the inner connecting cylinder (1) are respectively attached to the inner wall surfaces of the first pipe section (6) and the second pipe section (7), the two ends of the inner connecting cylinder (1) are connected to the first pipe section (6) and the second pipe section (7) through the fastening bolts (8) in the bolt through holes (2), the inner sides of the end surfaces of the first pipe section (6) and the second pipe section (7) are respectively provided with filling ring grooves (9), the outer filling ring (3) is located in the filling ring grooves (9), and the corners at the two ends of the filling ring grooves (9) are provided with locking tooth ring grooves (10) matched with the elastic locking teeth (4).

8. The multi-layer waterproof pipe connecting structure for municipal pipe jacking engineering according to claim 7, characterized in that: The outer side of the end surface of the first pipe section (6) is provided with an L-shaped socket groove (11), and the inner side of the end surface of the second pipe section (7) is provided with an L-shaped socket head (12), and the socket groove (11) is matched with the socket head (12).

9. The multi-layered waterproof pipe connection structure for municipal pipe jacking engineering according to claim 7 or 8, characterized in that: The water stop groove (5) in the middle part of the outer filling ring (3) is provided with an expanded water stop (13), and the expanded water stop (13) is opposite to the gap between the pipe section end surfaces.

10. The multi-layered waterproof pipe connection structure for municipal pipe jacking engineering according to claim 9, characterized in that: The expanded water stop (13) is of a trapezoidal cross section, and the water stop groove (5) is interference-fitted with the expanded water stop (13). The expanded water stop (13) is of a trapezoidal cross section, and the water stop groove (5) is interference-fitted with the expanded water stop (13).

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