A tunnel segment plug-in self-locking quick connecting device and a connecting method thereof

Abstract

The application discloses a kind of inserted self-locking quick connecting device for tunnel segment and its connecting method, and its connecting device includes the male connector assembly arranged in the rear assembled segment and the female connector assembly arranged in the first assembled segment, the pull head of screw rod is fixed by male connector assembly, the clamping anchoring section of screw rod is inserted into female connector assembly to be self-locked fixed, the quick connection of adjacent segment is completed;Its connecting method includes the following steps: assembling male connector assembly;Female connector assembly is assembled;When concrete segment is poured, male connector assembly and female connector assembly are installed correspondingly;Sleeve guide block;Screw rod is inserted into female connector assembly along with guide block, and the quick connection between segments is completed.The application is set by the connecting mode of male and female connector assembly of screw rod, realizes the applicable adjustment of segment splicing error, quick connection and fixation, is fast and convenient to operate, has the advantages of ingenious and reasonable structure design, safe and reliable, and economic and reasonable.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction technology, specifically relating to an insertion self-locking quick connection device for tunnel segments and its connection method. Background Technology

[0002] Tunnels are typically composed of multiple precast concrete segments, which are installed one by one on the construction site to form a complete tunnel structure. Tunnel segment locking joints are key components used to connect and secure tunnel segments during tunnel construction. Their design and use are crucial for the safety and durability of the tunnel, ensuring its stability under external forces such as underground pressure and earthquakes, and preventing displacement and separation between segments. Existing tunnel segment locking joints generally fall into two categories: bolted connections and quick-connect joints. Bolted connections suffer from problems such as large manholes and difficulty in positioning. Quick-connect joints are mainly of two types: friction type and limiting type. Friction type quick-connect joints tighten by creating pressure between two components, which then generates friction through a rough surface. Limiting type quick-connect joints tighten by using a wedge-shaped limiting pin within a locking box with an enlarged insertion end. However, both types suffer from low initial connection stiffness, poor adaptability to construction and installation errors, complex structure, and high processing difficulty.

[0003] To address the shortcomings of the aforementioned technologies, an insert-type self-locking quick connection device for tunnel segments and its usage method were developed to solve problems such as the inability to adapt to construction errors, complex joint structures, and insufficient connection rigidity in existing technologies. Summary of the Invention

[0004] This invention is proposed to solve the problems existing in the prior art, and its purpose is to provide an insertion self-locking quick connection device and connection method for tunnel segments.

[0005] The technical solution of the present invention is: a self-locking quick connection device for tunnel segments, comprising a male connector assembly disposed in the later-assembled segments and a female connector assembly disposed in the earlier-assembled segments. The male connector assembly fixes the anti-pull-out head of the screw, and the clamping anchoring section of the screw is inserted into the female connector assembly for self-locking fixation, thereby completing the quick connection of adjacent segments.

[0006] Furthermore, the male connector assembly includes a male outer sleeve, a male bearing plate perpendicular to it is disposed inside the male outer sleeve, and a male inner sleeve is installed inside the male outer sleeve.

[0007] Furthermore, the pull-out head of the screw is fixed between the male bearing plate and the male inner sleeve, and the pull-out section and clamping anchoring section connected to the pull-out head extend out of the male inner sleeve.

[0008] Furthermore, a guide block is fitted onto the pull-out section, and the guide block is located at the circumferential joint.

[0009] Furthermore, the female connector assembly includes a female outer sleeve, inside which a female inner sleeve is disposed, and a self-locking mounting cavity is formed between the female outer sleeve and the female inner sleeve, and the central hole of the female inner sleeve facilitates the insertion of the screw.

[0010] Furthermore, the inner wall of the female inner sleeve in the self-locking installation cavity is a tapered guide wall, and a wedge-shaped clamp is provided at the tapered guide wall. The wedge-shaped clamp is set on a retainer that holds it circumferentially.

[0011] Furthermore, a spring is provided between the retainer and the female support plate, and the spring presses the wedge-shaped clip against the conical guide wall of the female inner sleeve.

[0012] Furthermore, the wedge-shaped clip is composed of multiple clips, and adjacent clips are held apart by the retaining plates of the retainer.

[0013] Furthermore, a ring groove is formed on the outer wall of the clip, and a retaining spring is provided in the groove.

[0014] A method for connecting tunnel segments using an insertion self-locking quick-connect device includes the following steps:

[0015] A. Assemble the male connector assembly;

[0016] B. Assemble the female connector assembly;

[0017] C. When pouring concrete segments, install the corresponding male connector assembly and female connector assembly;

[0018] D. During segment assembly, guide blocks are fitted onto the screw.

[0019] E. The screw, along with the guide block, is inserted into the female connector assembly to complete the rapid connection between the segments.

[0020] The beneficial effects of this invention are as follows:

[0021] In this invention, the male connector assembly has spring washers and spherical washers on the front and rear of the anti-pull-out head of the inner screw. The screw and the male inner sleeve through hole are fitted with a clearance fit, which can adapt to a certain rotation angle requirement of the screw and facilitate the adaptation to assembly errors. A guide block is installed on the screw, which plays a guiding role when the female and male connector assemblies are connected, which facilitates the guidance and positioning during the assembly of the tube segments.

[0022] In this invention, a wedge-shaped clamp is installed inside the female connector assembly. Constrained by the spring thrust and the conical hole of the female sleeve, the clamp retracts and tightens. When the screw is inserted into the female connector assembly, the front end of the screw clamping and anchoring section self-locks with the wedge-shaped clamp, completing the quick connection and fixation between the segments. Furthermore, the inner hole of the wedge-shaped clamp and the screw clamping and anchoring section are equipped with anti-slip structures, which enable quick locking after insertion, improving the initial connection stiffness of the quick-connect joint, preventing changes in the segment splicing gap, and improving the sealing performance of the segment connection.

[0023] This invention, through the connection method of the male and female connector components using screws, enables the applicable adjustment of segment splicing errors, quick connection and fixation, and convenient operation. It has the advantages of ingenious and reasonable structural design, safety and reliability, and economic efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic cross-sectional view of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the male outer sleeve in this invention;

[0026] Figure 3 This is a schematic cross-sectional view of the female outer sleeve in this invention;

[0027] Figure 4 This is a schematic cross-sectional view of the female inner sleeve in this invention;

[0028] Figure 5 This is a schematic cross-sectional view of the male inner sleeve in this invention;

[0029] Figure 6 This is a schematic diagram of the wedge-shaped clip in the present invention;

[0030] Figure 7 This is a schematic diagram of the cage in this invention;

[0031] Figure 8 This is a schematic diagram of the screw structure in this invention;

[0032] Figure 9 This is a cross-sectional schematic diagram of the connection process of the present invention;

[0033] Figure 10 This is another cross-sectional schematic diagram of the connection process of the present invention;

[0034] Figure 11 This is a schematic cross-sectional view of the female inner sleeve in this invention;

[0035] in:

[0036] 1. Male connector assembly; 1-1. Male outer sleeve; 1-2. Male bearing plate; 1-3. Disc spring; 1-4. Spherical gasket; 1-5. Male inner sleeve; 1-11. Male pull-out plate; 1-12. Male outer sleeve outer tube; 1-51. Cross groove; 2. Guide block; 3. Screw; 3-1. Pull-out head; 3-2. Pull-out section; 3-3. Clamping and anchoring section; 4. Female connector assembly; 4-1. Female inner sleeve; 4-2. Female outer sleeve; 4-3. Wedge-shaped clamp; 4-4. Cage; 4-5. Snap ring; 4-6. Spring; 4-7. Female bearing plate; 4-21. Female pull-out plate; 4-22. Female outer sleeve outer tube. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0038] like Figures 1 to 11 As shown, a self-locking quick connection device for tunnel segments includes a male connector assembly 1 installed in the later-assembled segments and a female connector assembly 4 installed in the earlier-assembled segments. The male connector assembly 1 fixes the pull-out head 3-1 of the screw 3, and the clamping anchoring section 3-3 of the screw 3 is inserted into the female connector assembly 4 for self-locking fixation, thereby completing the quick connection of adjacent segments.

[0039] The male connector assembly 1 includes a male outer sleeve 1-1, a male support plate 1-2 perpendicular to it is provided inside the male outer sleeve 1-1, and a male inner sleeve 1-5 is installed inside the male outer sleeve 1-1.

[0040] The pull-out head 3-1 of the screw 3 is fixed between the male bearing plate 1-2 and the male inner sleeve 1-5, and the pull-out section 3-2 and the clamping and anchoring section 3-3 connected to the pull-out head 3-1 pass through the male inner sleeve 1-5.

[0041] The pull-out section 3-2 is fitted with a guide block 2, which is located at the circumferential joint.

[0042] The female connector assembly 4 includes a female outer sleeve 4-2, and a female inner sleeve 4-1 is provided inside the female outer sleeve 4-2. A self-locking installation cavity is formed between the female outer sleeve 4-2 and the female inner sleeve 4-1. The central hole of the female inner sleeve 4-1 facilitates the insertion of the screw 3.

[0043] The inner wall of the female inner sleeve 4-1 in the self-locking installation cavity is a tapered guide wall, and a wedge-shaped clamp 4-3 is provided at the tapered guide wall. The wedge-shaped clamp 4-3 is provided on the retainer 4-4 that holds it circumferentially.

[0044] A spring 4-6 is provided between the retainer 4-4 and the female support plate 4-7. The spring 4-6 presses the wedge-shaped clamp 4-3 against the conical guide wall of the female inner sleeve 4-1.

[0045] The wedge-shaped clip 4-3 is composed of multiple clips, and adjacent clips are held apart by the retaining plates of the retainer 4-4.

[0046] A ring groove is formed on the outer wall of the clip, and a retaining spring 4-5 is provided in the groove.

[0047] Specifically, the male outer sleeve 1-1 includes a male tensile plate 1-11 and a male outer sleeve outer tube 1-12. One end of the male outer sleeve outer tube 1-12 is connected to the male tensile plate 1-11, and the male bearing plate 1-2 is welded inside the male outer sleeve outer tube 1-12.

[0048] Specifically, an internal thread is formed on the inner wall of the mounting section of the male outer sleeve 1-12, and it is connected to the male inner sleeve 1-5 through the internal thread.

[0049] Specifically, a disc spring 1-3 is provided between the male bearing plate 1-2 and the anti-pull-out head 3-1 of the screw 3, and the disc spring 1-3 pushes the screw 3 outward as a whole.

[0050] Specifically, a spherical gasket 1-4 is provided between the other end of the anti-pull head 3-1 and the stepped surface of the male inner sleeve 1-5.

[0051] Specifically, the outer ring of the male inner sleeve 1-5 has a fully threaded structure and a cross groove 1-51 is provided at the end. The male outer sleeve 1-1 is extended, and the male inner sleeve 1-5 is completely screwed into the male outer sleeve 1-1, which facilitates the subsequent installation of the screw 3 and avoids the problem that the screw 3 cannot be removed after being inserted during the trial installation of the tube segment.

[0052] Similarly, the female outer sleeve 4-2 includes a female pull-out plate 4-21 and a female outer sleeve outer tube 4-22. The female pull-out plate 4-21 is connected to one end of the female outer sleeve outer tube 4-22, and the female support plate 4-7 is welded inside the female outer sleeve outer tube 4-22.

[0053] Specifically, one end of the female support plate 4-7 forms a mounting platform, and the spring 4-6 is fitted onto the mounting platform.

[0054] Specifically, the outer tube 4-22 of the female outer sleeve and the inner sleeve 4-1 are connected by threads.

[0055] Specifically, the preload spring 4-6 of the female bearing plate 4-7 provides thrust to the retainer 4-4 and the wedge-shaped clamp 4-3. The wedge-shaped clamp 4-3 is constrained by the thrust of the spring 4-6 and the conical hole of the female sleeve 4-2. The clamp retracts to clamp the clamping anchor section 3-3 of the screw 3.

[0056] Specifically, the wedge-shaped clamp 4-3 is composed of multiple coaxial clamps. The inner ring of the clamp has an anti-slip structure, the outer ring is limited by a retaining spring 4-5, and the clamps are limited between each other by a retainer 4-4. After the wedge-shaped clamp 4-3 is pushed and retracted, the inner diameter is smaller than the screw diameter.

[0057] Specifically, the anti-pull-out head 3-1, anti-pull-out section 3-2, and clamping and anchoring section 3-3 of the screw 3 are an integral structure. The clamping and anchoring section 3-3 is provided with an anti-slip structure, which may be, but is not limited to, a cross-knurled structure, a threaded structure, etc.

[0058] Specifically, the guide block 2 has a through hole in the center, chamfers on both sides, and gaps in the contact areas with the screw 3 and sleeve to accommodate the rotation of the screw 3 and the assembly error of the tube segments.

[0059] A method for connecting tunnel segments using an insertion self-locking quick-connect device includes the following steps:

[0060] A. Assemble male connector assembly 1;

[0061] B. Assemble the female connector assembly 4;

[0062] C. When pouring concrete segments, install male connector assembly 1 and female connector assembly 4 accordingly;

[0063] D. During the segment assembly, guide block 2 is installed on screw 3;

[0064] E. The screw 3, together with the guide block 2, is inserted into the female connector assembly 4 to complete the quick connection between the segments.

[0065] Specifically, step A involves assembling the male connector assembly 1, and the specific process is as follows:

[0066] During assembly, a spherical washer 1-4 is added to the front end of screw 3, screw 3 is inserted into male inner sleeve 1-5, disc spring 1-3 is placed in front of male outer sleeve 1-1 inner male bearing plate 1-2, and male outer sleeve 1-1 and male inner sleeve 1-5 are threaded and tightened.

[0067] Specifically, step B involves assembling the female connector assembly 4, and the specific process is as follows:

[0068] During assembly, the wedge-shaped clamp 4-3 is temporarily fixed by the snap ring 4-5 and the retainer 4-4, and then inserted into the conical guide wall of the inner sleeve 4-1. The spring 4-6 is placed in front of the female support plate 4-7 inside the outer sleeve 4-2, and then the inner and outer sleeves 4-2 are screwed on to constrain the wedge-shaped clamp 4-3 inside the inner sleeve 4-1.

[0069] Specifically, during step C, the concrete segment pouring, male connector assembly 1 and female connector assembly 4 are installed accordingly. The specific process is as follows:

[0070] During the concrete segment pouring of the shield tunnel, the assembled male connector assembly 1, screw rod 3, and female connector assembly 4 are first installed at the designed positions of the segments, and the anchor bars are welded to the concrete segments before concrete pouring.

[0071] Specifically, in step E, screw 3, together with guide block 2, is inserted into female connector assembly 4 to complete the quick connection between segments. The specific process is as follows:

[0072] The screw 3, together with the guide block 2, is inserted into the female connector assembly 4. The shield machine jack pushes and squeezes the two concrete segments together. The clamping and anchoring section 3-3 of the screw 3 and the wedge-shaped clamp 4-3 self-lock, completing the rapid connection between the segments.

[0073] In this invention, the male connector assembly has spring washers and spherical washers on the front and rear of the anti-pull-out head of the inner screw. The screw and the male inner sleeve through hole are fitted with a clearance fit, which can adapt to a certain rotation angle requirement of the screw and facilitate the adaptation to assembly errors. A guide block is installed on the screw, which plays a guiding role when the female and male connector assemblies are connected, which facilitates the guidance and positioning during the assembly of the tube segments.

[0074] In this invention, a wedge-shaped clamp is installed inside the female connector assembly. Constrained by the spring thrust and the conical hole of the female sleeve, the clamp retracts and tightens. When the screw is inserted into the female connector assembly, the front end of the screw clamping and anchoring section self-locks with the wedge-shaped clamp, completing the quick connection and fixation between the segments. Furthermore, the inner hole of the wedge-shaped clamp and the screw clamping and anchoring section are both equipped with anti-slip structures, which enable quick locking after insertion, improving the initial connection stiffness of the quick-connect joint, preventing changes in the segment splicing gap, and improving the sealing performance of the segment connection.

[0075] This invention, through the connection method of the male and female connector components using screws, enables the applicable adjustment of segment splicing errors, quick connection and fixation, and convenient operation. It has the advantages of ingenious and reasonable structural design, safety and reliability, and economic rationality.

Claims

1. A self-locking quick-connect device for tunnel segments, characterized in that: The system includes a male connector assembly (1) installed in the later-assembled segments and a female connector assembly (4) installed in the earlier-assembled segments. The male connector assembly (1) fixes the pull-out head (3-1) of the screw (3). The clamping and anchoring section (3-3) of the screw (3) is inserted into the female connector assembly (4) for self-locking fixation, thereby completing the rapid connection of adjacent segments. The male connector assembly (1) includes a male outer sleeve (1-1), a male bearing plate (1-2) perpendicular to it is provided inside the male outer sleeve (1-1), and a male inner sleeve (1-5) is installed inside the male outer sleeve (1-1). The male outer sleeve (1-1) includes a male pull-out plate (1-11) and a male outer sleeve outer tube (1-12). One end of the male outer sleeve outer tube (1-12) is connected to the male pull-out plate (1-11), and the male support plate (1-2) is welded inside the male outer sleeve outer tube (1-12). An internal thread is formed on the inner wall of the installation section of the male outer sleeve outer tube (1-12), and it is connected to the male inner sleeve (1-5) through the internal thread. The pull-out head (3-1) of the screw (3) is fixed between the male bearing plate (1-2) and the male inner sleeve (1-5), and the pull-out section (3-2) and the clamping and anchoring section (3-3) connected to the pull-out head (3-1) pass through the male inner sleeve (1-5). The female connector assembly (4) includes a female outer sleeve (4-2), and a female inner sleeve (4-1) is provided inside the female outer sleeve (4-2). A self-locking installation cavity is formed between the female outer sleeve (4-2) and the female inner sleeve (4-1). The central hole of the female inner sleeve (4-1) facilitates the insertion of the screw (3). A disc spring (1-3) is provided between the male bearing plate (1-2) and the anti-pull-out head (3-1) of the screw (3), and the disc spring (1-3) pushes the screw (3) outward as a whole; A spherical gasket (1-4) is provided between the end of the anti-pull-out head (3-1) away from the male bearing plate (1-2) and the stepped surface of the male inner sleeve (1-5). The screw (3) is clearance-fitted with the through hole of the male inner sleeve (1-5).

2. The insertion self-locking quick connection device for tunnel segments according to claim 1, characterized in that: The pull-out section (3-2) is fitted with a guide block (2), which is located at the circumferential joint.

3. The insertion self-locking quick connection device for tunnel segments according to claim 1, characterized in that: The inner wall of the female inner sleeve (4-1) in the self-locking installation cavity is a tapered guide wall, and a wedge-shaped clamp (4-3) is provided at the tapered guide wall. The wedge-shaped clamp (4-3) is set on the retainer (4-4) that holds it circumferentially.

4. The insertion self-locking quick connection device for tunnel segments according to claim 3, characterized in that: A spring (4-6) is provided between the retainer (4-4) and the female support plate (4-7), and the spring (4-6) presses the wedge-shaped clamp (4-3) against the conical guide wall of the female inner sleeve (4-1).

5. The insertion self-locking quick connection device for tunnel segments according to claim 4, characterized in that: The wedge-shaped clip (4-3) is composed of multiple clips, and adjacent clips are held apart by the retaining plates of the retainer (4-4).

6. The insertion self-locking quick connection device for tunnel segments according to claim 5, characterized in that: A ring groove is formed on the outer wall of the clip, and a retaining spring (4-5) is provided in the groove.

7. The connection method of the insertion self-locking quick connection device for tunnel segments according to claim 1, characterized in that: Includes the following steps: A. Assemble the male connector assembly (1); B. Assemble the female connector assembly (4); C. When pouring concrete segments, install the male connector assembly (1) and the female connector assembly (4) accordingly. D. When assembling the segments, a guide block (2) is fitted onto the screw (3); E. The screw (3) together with the guide block (2) is inserted into the female connector assembly (4) to complete the quick connection between the segments; Step A is to assemble the male connector assembly (1). The specific process is as follows: During the assembly process, a spherical washer (1-4) is added to the front end of the screw (3), the screw (3) is inserted into the male inner sleeve (1-5), a disc spring (1-3) is placed in front of the male bearing plate (1-2) inside the male outer sleeve (1-1), and the male outer sleeve (1-1) and the male inner sleeve (1-5) are threaded and tightened.

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