Conical self-locking type shield segment connecting mechanism and mounting method

Abstract

The invention discloses a conical self-locking type shield segment connecting mechanism and a mounting method, the mechanism comprises a pre-assembled segment and a post-assembled pipe, the pre-assembled segment is provided with a taper pin sleeve for socket fixing, the post-assembled pipe is internally provided with a threaded sleeve, the threaded sleeve is internally connected with a connecting pin rod, the connecting pin rod is aligned with the taper pin sleeve, and the taper pin sleeve is connected with the post-assembled pipe. The connecting pin rod can be inserted and fixed in the taper pin sleeve; the installation method comprises the following steps that the conical assemblies are assembled; the conical assembly is installed, and the taper pin sleeve is assembled; mounting a taper pin sleeve and a threaded sleeve; mounting a connecting pin rod; and a connecting pin rod is inserted into the taper pin sleeve, and self-locking is carried out to complete fixation of the pipe piece which is firstly assembled and the pipe which is then assembled. Connection of adjacent pipes is automatically completed along with splicing and installation of the pipe pieces, the reverse self-locking fastening effect is achieved, automation and unmanned shield pipe piece splicing operation are achieved, the inner surface of a formed pipe piece lining ring is smooth and free of holes, water leakage channels of pipe piece joints are reduced, and the splicing precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled engineering structures, and in particular relates to a conical self-locking shield segment connection mechanism and an installation method. Background Art

[0002] At present, the shield tunnel segment structure joints are mainly bolted, that is, the segments are connected into rings by bolting after the segments are assembled. With the rapid development of shield tunnel construction equipment and artificial intelligence-assisted technology, the traditional manual installation of bolt connections has restricted the mechanization and automation of shield construction. At the same time, there are problems such as bolt holes forming new seepage channels in the segment joints and hidden dangers of exposed bolts falling off. The industry has begun to seek solutions that can automatically complete the rapid connection between segments during the assembly process. Summary of the invention

[0003] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a conical self-locking shield segment connection mechanism and an installation method.

[0004] The technical solution of the present invention is: a conical self-locking shield segment connection mechanism, including a first-assembled segment and a second-assembled tube, the first-assembled segment is provided with a tapered pin sleeve for socket fixing, the second-assembled tube is provided with a threaded sleeve, the threaded sleeve is connected with a connecting pin rod, the connecting pin rod is aligned with the tapered pin sleeve, and the connecting pin rod can be inserted and fixed in the tapered pin sleeve.

[0005] Furthermore, one end of the connecting pin forms a connecting pin threaded end, the other end of the connecting pin forms a connecting pin tapered end, and the middle part of the connecting pin is a steel core.

[0006] Furthermore, the threaded end of the connecting pin is threadably connected and fixed to the threaded sleeve.

[0007] Furthermore, the steel core is covered with a flexible sheath.

[0008] Furthermore, the small diameter side of the tapered end of the connecting pin faces the threaded end of the connecting pin, and the large diameter side faces the tapered pin sleeve.

[0009] Furthermore, the tapered pin sleeve includes a sleeve body, a sleeve bottom seal is provided on one side of the sleeve body, the interior of the sleeve body is a small diameter in the middle and large diameters on both sides, the sleeve body and the sleeve bottom seal together form a telescopic locking cavity, and the side of the sleeve body facing the rear assembly tube forms an entry cavity.

[0010] Furthermore, a compression spring is arranged in the telescopic locking cavity, one end of the compression spring is connected to the bottom cover of the sleeve, and the other end of the compression spring is connected to the conical component, and the compression spring presses the conical component to the small diameter of the sleeve body.

[0011] Furthermore, the conical component includes a plurality of conical clamps, each of which is provided with an annular groove, in which a fixing ring is sleeved. When the conical component is pressed toward the bottom of the sleeve, it spreads outward and expands outward, so that the conical end of the connecting pin enters the conical component and is fixed by the return pressure of the compression spring.

[0012] A method for installing a conical self-locking shield segment connection mechanism comprises the following steps: A. Assemble the cone components; B. Install the tapered assembly and assemble the taper pin sleeve; C. Install the taper pin sleeve and threaded sleeve; D. Install the connecting pin on the threaded sleeve; E. Insert the connecting pin into the tapered pin sleeve to self-lock and fix the assembled pipe segments first and then the assembled pipes.

[0013] Furthermore, step A assembles the cone assembly, and the specific process is as follows: First, take the retaining ring and several conical clamps; Then, fix the fixing ring in the ring groove of the conical clamp once to complete the assembly of the conical component.

[0014] The beneficial effects of the present invention are as follows: The present invention automatically completes the connection of adjacent pipes as the segments are spliced ​​and installed, and has a reverse self-locking fastening effect, which can realize the automation and unmanned splicing of shield segments. The inner surface of the segment lining ring formed is smooth and free of holes, which reduces the water leakage channels of the segment joints and improves the assembly accuracy of the segment structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the general diagram after assembling of the present invention; Figure 2 It is the general diagram before embedding of the present invention; Figure 3 It is the general assembly drawing of the taper pin sleeve in the present invention; Figure 4 It is a structural diagram of the connecting pin rod in the present invention; in: 1 Taper pin sleeve 2 Threaded sleeve 3 Connecting pin 4 Sleeve body 5 Conical clamp 6 Fixing ring 7 Compression spring 8 Sleeve bottom seal 9 Steel core 10 Flexible sleeve 11 Connecting pin tapered end 12 Connecting pin threaded end 100 Assemble the pipe segments first 101 Assemble the pipe segments later 102 Segment annulus. DETAILED DESCRIPTION

[0016] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 4 As shown, a conical self-locking shield segment connection mechanism includes a first-assembled segment 100 and a second-assembled tube 101. The first-assembled segment 100 is provided with a tapered pin sleeve 1 for socket fixing, and the second-assembled tube 101 is provided with a threaded sleeve 2, and a connecting pin 3 is connected to the threaded sleeve 2. The connecting pin 3 is aligned with the tapered pin sleeve 1, and the connecting pin 3 can be inserted and fixed in the tapered pin sleeve 1.

[0017] One end of the connecting pin 3 forms a connecting pin threaded end 12 , the other end of the connecting pin 3 forms a connecting pin tapered end 11 , and the middle portion of the connecting pin 3 is a steel core 9 .

[0018] The threaded end 12 of the connecting pin is threadably connected and fixed to the threaded sleeve 2 .

[0019] The steel core 9 is covered with a flexible sheath 10 .

[0020] The small diameter side of the connecting pin tapered end 11 faces the connecting pin threaded end 12 , and the large diameter side faces the tapered pin sleeve 1 .

[0021] The tapered pin sleeve 1 includes a sleeve body 4, a sleeve bottom seal 8 is provided on one side of the sleeve body 4, the interior of the sleeve body 4 is a small diameter in the middle and large diameters on both sides, the sleeve body 4 and the sleeve bottom seal 8 enclose a telescopic locking cavity, and the side of the sleeve body 4 facing the rear assembly tube 101 forms an entry cavity.

[0022] A compression spring 8 is arranged in the telescopic locking cavity, one end of the compression spring 8 is connected to the sleeve bottom 8, and the other end of the compression spring 8 is connected to the cone component. The compression spring 8 presses the cone component to the small diameter of the sleeve body 4.

[0023] The conical component includes a plurality of conical clamps 5, an annular groove is formed on the outer side of the conical clamps 5, and a fixing ring 6 is sleeved in the above-mentioned annular groove. When the conical component is pressed toward the sleeve bottom 8, it spreads outward and expands outward, so that the conical end 11 of the connecting pin enters into the conical component and is fixed with the return pressure of the compression spring 8.

[0024] Specifically, Figure 3 As shown, the flexible sleeve 10 integrally covers the connecting pin conical end 11 and the steel core 9 of the connecting pin 3 , and the connecting pin threaded end 12 is exposed outside the flexible sleeve 10 .

[0025] Specifically, an outer convex shaft ring is formed on the outer wall of the steel core 9 of the connecting pin rod 3, and an annular groove is correspondingly formed on the inner wall of the flexible sleeve 10.

[0026] Specifically, the outer wall of the flexible sleeve 10 at the steel core 9 is stepped, and the middle step has the largest outer diameter, and the steps on both sides of the middle step are symmetrical.

[0027] Specifically, the small diameter in the middle of the sleeve body 4 divides the sleeve body 4 internally. In the entry cavity, the inner cavity of the sleeve body 4 is adapted to the stepped side walls of the connecting pin 3 and the flexible sleeve 10, so as to accommodate the above-mentioned steps in position.

[0028] More specifically, in the telescopic locking cavity of the sleeve body 4, the side wall thereof is a conical surface, which is adapted to the taper of the outer wall of the conical component, so that the conical component is in surface contact with the inner wall of the telescopic locking cavity and is firmly compressed under the action of the compression spring 7.

[0029] Specifically, the taper of the conical end 11 of the connecting pin is consistent with the taper of the inner wall of the conical component, so that the conical end 11 of the connecting pin placed therein can be locked and fixed.

[0030] Specifically, the top of the conical clamp 5 forms an inner chamfer, and the tail of the conical end 11 of the connecting pin forms an outer chamfer. In the process of pushing the conical clamp 5 to press the compression spring 7 and move toward the sleeve bottom 8, the conical end 11 of the connecting pin can squeeze the conical clamp 5 to the surroundings, thereby opening the conical assembly and allowing the conical end 11 of the connecting pin to enter it.

[0031] More specifically, after the conical end 11 of the connecting pin enters the conical assembly, the compression spring will press the entirety toward the middle diameter of the sleeve body 4. At this time, the outer wall of the conical assembly is fixed in surface contact with the telescopic locking cavity, and the inner wall of the conical assembly is fixed in surface contact with the conical end 11 of the connecting pin.

[0032] Specifically, the sleeve body 4 and the sleeve bottom cover 8 are connected by threaded connection.

[0033] Specifically, the positioning ring 6 is in a circular ring shape and has a notch.

[0034] Specifically, the flexible sleeve 10 is wrapped with the steel core 9 by a vulcanization process, and has a stepped cylindrical shape that matches the tapered pin sleeve 1 and the threaded sleeve 2 .

[0035] A method for installing a conical self-locking shield segment connection mechanism comprises the following steps: A. Assemble the cone components; B. Install the tapered component and assemble the taper pin sleeve 1; C. Install the taper pin sleeve 1 and threaded sleeve 2; D. Install the connecting pin 3 at the threaded sleeve 2; E. Insert the connecting pin rod 3 into the conical pin sleeve 1 to self-lock and fix the assembled pipe segments 100 first and then the assembled pipes 101.

[0036] Step A: Assemble the cone assembly. The specific process is as follows: First, take the fixing ring 6 and a plurality of conical clamps 5; Then, the fixing ring 6 is fixed in the annular groove of the conical clamp 5 once to complete the assembly of the conical component.

[0037] Specifically, in step B, the tapered component is installed to assemble the tapered pin sleeve 1, and the specific process is as follows: First, place the assembled cone assembly into the telescopic locking cavity of the sleeve body 4; Then, install the compression spring 7; Then, the sleeve bottom seal 8 is installed to complete the installation of the taper pin sleeve 1.

[0038] Specifically, step C installs the taper pin sleeve 1 and the threaded sleeve 2, and the specific process is as follows: First, the cone pin sleeve 1 is embedded and installed on the side of the jack facing the annular seam of the pipe segment; Then, the threaded sleeve 2 is pre-buried and installed on one side of the back jack of the segment annular seam.

[0039] Specifically, step D is to install the connecting pin 3 at the threaded sleeve 2, and the specific process is as follows: A wrench is used to fasten the connecting pin 3 to the threaded sleeve 2 on one end face of the annular seam back jack of the segment to be assembled.

[0040] Specifically, in step E, the connecting pin rod 3 is inserted into the conical pin sleeve 1, and the self-locking is completed to fix the first assembled pipe segment 100 and then the assembled pipe 101. The specific process is as follows: First, the segment assembly machine is used to butt the segment with the connecting pin 3 installed with the conical pin sleeve of the previous segment and then insert and connect them in the longitudinal direction; Then, during the insertion and connection process, the connecting pin 3 squeezes the conical clamp 5, and the conical clamp 5 slides along the inner wall of the sleeve body 4 and expands outwards; Finally, under the squeezing action of the bottom compression spring 7, the connecting pin 3 is wedged into the gap between the inner wall of the tapered pin sleeve 1 to achieve a locking connection between the connecting pin 3 and the tapered pin sleeve 1.

[0041] The present invention automatically completes the connection of adjacent pipes as the segments are spliced ​​and installed, and has a reverse self-locking fastening effect, which can realize the automation and unmanned splicing of shield segments. The inner surface of the segment lining ring formed is smooth and free of holes, which reduces the water leakage channels of the segment joints and improves the assembly accuracy of the segment structure.

Claims

1. A conical self-locking shield segment connection mechanism, comprising first assembling segments (100) and then assembling pipes (101), characterized in that: The first assembled pipe segment (100) is provided with a taper pin sleeve (1) for socket fixing, and the second assembled pipe (101) is provided with a threaded sleeve (2). A connecting pin (3) is connected to the threaded sleeve (2). The connecting pin (3) is aligned with the taper pin sleeve (1), and the connecting pin (3) can be inserted into and fixed in the taper pin sleeve (1).

2. The conical self-locking shield segment connection mechanism according to claim 1, characterized in that: One end of the connecting pin (3) forms a connecting pin threaded end (12), the other end of the connecting pin (3) forms a connecting pin tapered end (11), and the middle portion of the connecting pin (3) is a steel core (9).

3. The conical self-locking shield segment connection mechanism according to claim 2 is characterized in that: The threaded end (12) of the connecting pin is threadably connected and fixed to the threaded sleeve (2).

4. The conical self-locking shield segment connection mechanism according to claim 2, characterized in that: The steel core (9) is covered with a flexible sleeve (10).

5. The conical self-locking shield segment connection mechanism according to claim 2, characterized in that: The small diameter side of the connecting pin tapered end (11) faces the connecting pin threaded end (12), and the large diameter side faces the tapered pin sleeve (1).

6. The conical self-locking shield segment connection mechanism according to claim 5, characterized in that: The tapered pin sleeve (1) comprises a sleeve body (4), a sleeve bottom seal (8) being arranged on one side of the sleeve body (4), the interior of the sleeve body (4) being a small diameter in the middle and large diameters on both sides, the sleeve body (4) and the sleeve bottom seal (8) forming a telescopic locking cavity, and the side of the sleeve body (4) facing the rear assembly tube (101) forming an entry cavity.

7. The conical self-locking shield segment connection mechanism according to claim 6, characterized in that: A compression spring (8) is arranged in the telescopic locking cavity, one end of the compression spring (8) is connected to the sleeve bottom cover (8), and the other end of the compression spring (8) is connected to the conical component. The compression spring (8) presses the conical component against the small diameter of the sleeve body (4).

8. The conical self-locking shield segment connection mechanism according to claim 7, characterized in that: The conical assembly comprises a plurality of conical clamping members (5), each of which is provided with an annular groove, in which a fixing ring (6) is sleeved. When the conical assembly is pressed toward the sleeve bottom cover (8), it spreads outward and expands outward, so that the conical end (11) of the connecting pin enters the conical assembly and is fixed with the return pressure of the compression spring (8).

9. A method for installing a conical self-locking shield segment connection mechanism, characterized in that: The following steps are involved: A. Assemble the cone components; B. Install the tapered assembly and assemble the taper pin sleeve (1); C. Install the taper pin sleeve (1) and threaded sleeve (2); D. Install the connecting pin (3) on the threaded sleeve (2); E. Insert the connecting pin (3) into the conical pin sleeve (1) to self-lock and fix the first assembled pipe segment (100) and the second assembled pipe (101).

10. The method for installing a conical self-locking shield segment connection mechanism according to claim 9, characterized in that: Step A: Assemble the cone assembly. The specific process is as follows: First, take the fixing ring (6) and a plurality of conical clamps (5); Then, the fixing ring (6) is fixed in the annular groove of the conical clamp (5) once, thereby completing the assembly of the conical assembly.

Images