Longitudinal seam connecting piece for shield tunnel lining segment

Abstract

The utility model discloses a shield tunnel lining segment longitudinal seam connecting piece which comprises a fixing nut, a screw rod is fixedly connected to the center of the top end of the fixing nut, a rotating nut is arranged above the screw rod, an elastic washer is arranged below the outer wall of the screw rod, and a circular ring is arranged below the elastic washer. According to the longitudinal seam connecting piece for the shield tunnel lining segment, through cooperation of a fixing nut, a screw rod, a rotating nut, an elastic gasket, a circular ring, a first soft sleeve, a first transverse hole, a vertical hole, a second transverse hole, a second soft sleeve and a metal binding wire, air in the first soft sleeve is injected into the second soft sleeve through the first transverse hole, the vertical hole and the second transverse hole; the internal air pressure of the second soft sleeve is increased, the volume is expanded, the outer surface of the second soft sleeve abuts against the inner wall of a hole, penetrated by the screw, of the workpiece, looseness is not prone to occurring after installation and fastening, and the follow-up operation strength of the installed workpiece can be guaranteed in a high-quality mode.

Description

Technical Field

[0001] The utility model relates to the technical field of segment longitudinal seam connectors, in particular to a segment longitudinal seam connector for shield tunnel lining. Background Art

[0002] In tunnel construction, there is a machine called a shield machine that is used for starting and excavating. It has the functions of excavating and cutting soil, transporting soil and assembling tunnel linings, etc. However, when the shield machine is lining the tunnel, it is assembled with several segments. There is a screw that acts as a connection and fastening function, and assembles to form a cylindrical pipe. The segment is a cylindrical wall. It can effectively control ground settlement during excavation, reduce the impact on ground buildings, and not affect surface traffic during underwater excavation. The segments are combined together to form a pipeline. This design is a straight line or a certain arc fastening connector, which is the segment bolt. Segment bolts are divided into circumferential and longitudinal. In some designs, the circumferential and longitudinal specifications are the same. In some designs, the circumferential and longitudinal use two specifications, or even two strength grades. Generally speaking, the length of the circumferential segment bolts is longer than that of the longitudinal segment bolts.

[0003] When the existing tunnel segment bolts are in use, in order to facilitate the bolts to smoothly penetrate the segments, there is a certain gap between the bolts and the bolt holes on the segments. Therefore, after the tunnel segments vibrate for a long time, the segment bolts and the bolt holes of the segments are prone to loosening, affecting the subsequent operating strength of the segments after installation. Utility Model Content

[0004] The utility model aims to provide a longitudinal seam connector for shield tunnel lining segments, so as to solve the problem that when the existing tunnel segment bolts are used, in order to facilitate the bolts to smoothly penetrate the segments, there is a certain gap between the bolts and the bolt holes on the segments. Therefore, after the tunnel segments vibrate for a long time, the segment bolts and the bolt holes of the segments are prone to loosening, affecting the subsequent operating strength problem of the segment installation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a longitudinal seam connector for a shield tunnel lining segment, comprising a fixing nut, a screw is fixedly connected to the top center of the fixing nut, a rotating nut is arranged above the screw, an elastic washer is arranged below the outer wall of the screw, a circular ring is arranged below the elastic washer, a first soft sleeve is fixedly connected to the lower surface of the circular ring, the bottom end of the first soft sleeve is fixedly connected to the contact surface of the fixing nut, first transverse holes are arranged on both sides of the interior of the first soft sleeve, the first transverse hole is opened above the outer wall of the screw, a vertical hole is arranged between the two first transverse holes, the vertical hole is vertically opened in the interior of the screw, two second soft sleeves are arranged in sequence from bottom to top on the outer wall of the screw, metal binding wires are tied to the upper and lower ends of the outer wall of the second soft sleeve, second transverse holes are arranged on both sides of the inner wall of the second soft sleeve, the second transverse hole is opened above the outer wall of the screw, and the second transverse hole and the interior of the vertical hole are connected to each other.

[0006] Preferably, the second soft sleeve is located inside the annular groove, and the annular groove is opened above the outer wall of the screw.

[0007] Compared with the prior art, the utility model has the following beneficial effects: the longitudinal seam connector for shield tunnel lining segments has the following advantages over the traditional technology:

[0008] Through the coordination among the fixed nut, the screw rod, the rotating nut, the elastic washer, the circular ring, the first soft sleeve, the first transverse hole, the vertical hole, the second transverse hole, the second soft sleeve and the metal binding wire, the rotating nut is connected to the screw rod thread and is pressed against the outer surface of the workpiece; as the rotating nut rotates, the rotating tightening force gradually increases, the fixed nut and the circular ring approach each other, the internal space of the first soft sleeve shrinks and the air pressure rises, the air inside the first soft sleeve is injected into the second soft sleeve through the first transverse hole, the vertical hole and the second transverse hole, the internal air pressure of the second soft sleeve increases and the volume expands, the outer surface of the second soft sleeve will be pressed against the inner wall of the hole penetrated by the screw rod in the workpiece, and it is not easy to loosen after installation and tightening, and the strength of the installed workpiece in subsequent operation can be guaranteed with high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 for Figure 1 A front partial sectional view of the

[0012] Figure 3 for Figure 2 A partial enlarged view of .

[0013] In the figure: 1. fixed nut, 2. screw rod, 3. rotating nut, 4. elastic washer, 5. circular ring, 6. first soft sleeve, 7. first transverse hole, 8. vertical hole, 9. second transverse hole, 10. second soft sleeve, 11. metal binding wire, 12. ring groove. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-3 The utility model provides a technical solution: a longitudinal seam connector for shield tunnel lining segments, comprising a fixed nut 1, a screw rod 2 is fixedly connected to the top center of the fixed nut 1, a rotating nut 3 is arranged above the screw rod 2, the fixed nut 1, the screw rod 2 and the rotating nut 3 are all made of 35CrMo (alloy quenched and tempered steel), an elastic washer 4 is arranged below the outer wall of the screw rod 2, a circular ring 5 is arranged below the elastic washer 4, the inner wall of the circular ring 5 is clearance-matched with the outer wall of the screw rod 2, a first soft sleeve 6 is fixedly connected to the lower surface of the circular ring 5, the first soft sleeve 6 and the second soft sleeve 10 are both made of fluororubber and have certain flexibility, the bottom end of the first soft sleeve 6 is fixedly connected to the contact surface of the fixed nut 1, first transverse holes 7 are arranged on both sides of the interior of the first soft sleeve 6, the first transverse holes 7 are opened above the outer wall of the screw rod 2, and a first transverse hole 7 is arranged between the two first transverse holes 7. There is a vertical hole 8, which is vertically opened inside the screw 2. The top of the screw 2 is a closed structure, and the top of the vertical hole 8 can be blocked. The blocking method can be welding but is not limited to it. The vertical holes 8 are interconnected with the inside of the first transverse hole 7 and the second transverse hole 9. The outer wall of the screw 2 is provided with two second soft sleeves 10 from bottom to top, and the upper and lower ends of the outer wall of the second soft sleeve 10 are tightly tied with metal binding wires 11. Second transverse holes 9 are provided on both sides of the inner wall of the second soft sleeve 10. The second transverse hole 9 is opened above the outer wall of the screw 2. The second transverse hole 9 is connected with the inside of the vertical hole 8. The second soft sleeve 10 is located inside the annular groove 12, and the annular groove 12 is opened above the outer wall of the screw 2. The opening of the annular groove 12 can make the outer diameter of the second soft sleeve 10 and the metal binding wire 11 smaller than the outer diameter of the screw 2, so that the screw 2 can be inserted and partially penetrate the workpiece to be connected.

[0016] Used for the longitudinal seam connector of shield tunnel lining segment, during the use, the operator first passes the screw 2 through the two workpieces to be connected, and uses the rotating nut 3 to make a threaded connection with the screw 2, and makes the rotating nut 3 press against the outer surface of the workpiece to complete the connection operation between the two workpieces. During this process, as the rotating nut 3 continues to rotate clockwise, the tightening force gradually increases, the fixing nut 1 and the ring 5 approach each other, the internal space of the first soft sleeve 6 shrinks and the air pressure rises, the air inside the first soft sleeve 6 is injected into the second soft sleeve 10 through the first transverse hole 7, the vertical hole 8 and the second transverse hole 9, the internal air pressure of the second soft sleeve 10 increases and the volume expands, the outer surface of the second soft sleeve 10 will press against the inner wall of the hole through which the screw 2 penetrates the workpiece, which can increase the stability between the screw 2 and the installation hole wall, so that it is not easy to loosen after installation and tightening, and the strength of the subsequent operation of the installed workpiece can be guaranteed with high quality.

[0017] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0019] It should also be noted that, for ease of description, only the parts related to the relevant disclosure are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other; it should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units; it should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are schematic and not restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more"; the names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only for illustrative purposes, and are not used to limit the scope of these messages or information.

[0020] In the present utility model, the words "elements", "components" and "materials" involved are only used to facilitate relevant technical personnel to understand and realize their roles, rather than to limit and protect their components.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A longitudinal seam connector for shield tunnel lining segments, comprising a fixing nut (1), Features: A screw rod (2) is fixedly connected to the center of the top end of the fixing nut (1), a rotating nut (3) is arranged above the screw rod (2), an elastic washer (4) is arranged below the outer wall of the screw rod (2), a circular ring (5) is arranged below the elastic washer (4), a first soft sleeve (6) is fixedly connected to the lower surface of the circular ring (5), the bottom end of the first soft sleeve (6) is fixedly connected to the contact surface of the fixing nut (1), first transverse holes (7) are arranged on both sides of the interior of the first soft sleeve (6), and the first transverse holes (7) are opened on the outer wall of the screw rod (2). A vertical hole (8) is provided between the two first transverse holes (7) above the wall, and the vertical hole (8) is vertically opened inside the screw rod (2). The outer wall of the screw rod (2) is provided with two second soft sleeves (10) sleeved in sequence from bottom to top, and the upper and lower ends of the outer wall of the second soft sleeve (10) are tightly bound with metal binding wires (11), and the inner wall of the second soft sleeve (10) is provided with second transverse holes (9) on both sides, and the second transverse holes (9) are opened above the outer wall of the screw rod (2), and the second transverse holes (9) and the interior of the vertical holes (8) are communicated with each other.

2. A longitudinal seam connector for shield tunnel lining segments according to claim 1, Features: The second soft sleeve (10) is located inside the annular groove (12), and the annular groove (12) is opened above the outer wall of the screw rod (2).

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