A waterproof structure for pipe segments in shield construction

Abstract

The present invention relates to the technical field of waterproofing of pipe segments in shield construction, and specifically to a waterproofing structure of pipe segments in shield construction. It comprises pipe segments, wherein an upper sealing gasket is provided on the upper part of the connecting side surfaces of the two connected pipe segments, and a lower sealing gasket is provided on the lower part. A snap-in groove is provided at one end of the pipe segment, and a snap-in piece that cooperates with the snap-in groove is provided at the other end, thereby realizing rapid alignment and installation. A middle sealing gasket squeezed by an extrusion mechanism is provided between the snap-in piece and the snap-in groove. The present invention is provided with four waterproof structures. First, an upper sealing gasket, a lower sealing gasket, a middle sealing gasket, and an annular gasket are provided on the end face of the pipe segment, thereby realizing four waterproof functions as a whole. At the same time, sealing gaskets are provided at the screws and bolts to realize an auxiliary waterproof function. The extrusion mechanism squeezes the middle sealing gasket to achieve a waterproof effect, and the extrusion has a more solid waterproof capability.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction pipe segment waterproofing, and in particular to a pipe segment waterproofing structure in shield construction. Background Art

[0002] With the growth of the domestic economy and the advancement of scientific research, shield construction technology has become a relatively mature construction technique. However, urban subway planning requires shield tunnels to pass through downtown areas and large residential areas to alleviate traffic pressure. This inevitably requires passing under water-rich strata and various underground pipelines. To prevent the impact of various underground water sources on the tunnel and ensure the safety of tunnel construction, operation, and maintenance, shield tunnels must be waterproofed to a certain extent. Shield segments, as the key component between the tunnel and the surrounding environment, are undoubtedly the top priority in shield tunnel waterproofing. Summary of the Invention

[0003] In response to the above-mentioned problems, the present invention provides a structure for waterproofing pipe segments in shield construction. A snap-in groove is provided at one end of the pipe segment, and a snap-in piece cooperating with the snap-in groove is provided at the other end. A middle sealing gasket squeezed by an extrusion mechanism is provided between the snap-in piece and the snap-in groove, and bolts are provided at the same time, which can realize the rapid installation of two pipe segments and achieve four-layer waterproofing effects.

[0004] The technical solutions of the present invention are as follows:

[0005] A structure for waterproofing pipe segments in shield construction includes pipe segments, wherein an upper sealing gasket is provided on the upper part of the connecting side surfaces of the two connected pipe segments, and a lower sealing gasket is provided on the lower part; one end of the pipe segment is provided with a clamping groove, and the other end is provided with a clamping piece that cooperates with the clamping groove; a middle sealing gasket squeezed by an extrusion mechanism is provided between the clamping piece and the clamping groove.

[0006] Preferably, the extrusion mechanism includes a first connecting rod, a second connecting rod and a sliding bar, a U-shaped mounting groove is provided on the outer periphery of the clamping groove, a through sliding hole is provided between the mounting groove and the clamping groove, a sliding rod is slidably arranged in the sliding hole, one end of the first connecting rod is hinged to the sliding rod, and the other end is hinged to the end of the second connecting rod, the other end of the second connecting rod is hinged to the sliding bar, a support rod is fixedly provided on the outer side wall of the clamping groove, and the support rod is hinged to the middle part of the first connecting rod.

[0007] Preferably, the upper and lower side walls of the snap-fit ​​groove are provided with a wedge-shaped groove that passes through the installation groove, and a wedge-shaped sealing strip is provided in the wedge-shaped groove. Most of the sealing strip is located in the installation groove, and the sliding strip is a trapezoidal structure, and its interface with the sealing strip is an inverted slope.

[0008] Preferably, a positioning hole is formed on the side wall of the mounting groove, a spring is provided in the positioning hole, one end of the spring is fixed in the positioning hole, and the other end is fixedly connected to the sliding rod.

[0009] Preferably, the pipe segment is provided with a vertical threaded hole, and the threaded hole is staggered with the second connecting rod, the clamping piece is provided with a through hole with the same structure as the threaded hole, and the lower end of the threaded hole is provided with a rod hole passing through it.

[0010] Preferably, the pipe segment with the snap-in groove is also provided with a screw hole, and the other pipe segment is provided with a smooth hole. Screws are provided in the screw hole and the smooth hole and are fixed by nuts. A limiting hole is provided on the screw, and the limiting hole and the rod hole are correspondingly connected after the screw is tightened.

[0011] Preferably, a bolt is provided in the threaded hole, and a limiting rod is integrally formed at the bottom of the bolt, and the limiting rod is provided through the rod hole and the limiting hole.

[0012] A waterproof structure for pipe segments in shield construction, its working principle is that an upper sealing gasket is set on the upper part of the connecting side of two connected pipe segments, a lower sealing gasket is set on the lower part, an annular gasket is set at the smooth hole and screw hole where the two pipe segments are connected, the clamping piece of one pipe segment is aligned with the clamping groove of the other pipe segment, and then the two pipe segments are pressed against each other by a jack, and the screw is tightened at the same time. The pre-tightening force of the screw will further tighten the two pipe segments, and at this time the limit hole of the screw is aligned with the rod hole; In the process of pressing into the card slot, the sliding rod will be pushed to the left, and then the first connecting rod will be driven to rotate. In the process of the first connecting rod rotating, the second connecting rod will be driven to the right, and the sliding bar will be pushed to the right at the same time. The inclined surface of the sliding bar will squeeze the middle sealing gasket to move into the card slot, thereby achieving further sealing of the card piece; after the card piece is completely inserted into the card slot, the through hole will be aligned with the threaded hole, and the bolt will be screwed in to fix the card piece, and at the same time the limit rod will be inserted into the limit hole and the rod hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention is equipped with a four-layer waterproof structure. First, upper and lower sealing gaskets are installed on the end faces of the tube segments, a middle sealing gasket is installed at the clamping groove, and an annular gasket is installed at the screw where the tube segments connect. Thus, the overall four-layer waterproof function is achieved. At the same time, sealing gaskets are installed at the screw and bolt to achieve auxiliary waterproof function.

[0015] 2. The present invention is provided with a snap-fit ​​groove and snap-fit ​​piece, which can realize quick alignment and positioning installation. At the same time, the snap-fit ​​installation avoids the misalignment of the two pipe segments, which would cause the upper and lower sealing gaskets to be misaligned, thereby reducing the waterproof performance.

[0016] 3. The squeezing mechanism provided in the present invention squeezes the middle sealing gasket to achieve a waterproof effect, and the squeezing provides a more solid waterproof capability;

[0017] 4. The present invention is provided with a new type of bolt structure, which can fix the two pipe segments on the one hand, and can be passed through the screw rod on the other hand, thereby solving the problem of the nut on the existing screw rod loosening and falling out due to the vibration of the pipe segment, reducing the bearing capacity of the nut, and thus avoiding the problem of dislocation of the pipe segment and enlargement of the gap between the sealing gaskets due to loosening of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0019] In the attached figure:

[0020] Figure 1 It is a main cross-sectional view of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of part A;

[0022] Figure 3 is a cross-sectional view of a bolt;

[0023] Figure 4 A top view of the present invention;

[0024] Figure 5 is a side sectional view of the position limiting member of the present invention;

[0025] Among them: 1. pipe segment, 2. snap-fit ​​groove, 3. upper sealing gasket, 4. lower sealing gasket, 5. oblique square groove, 6. bolt, 7. screw, 8. ring gasket, 9. limiting hole, 10. rod hole, 11. threaded hole, 12. snap-fit ​​plate, 13. through hole, 14. middle sealing gasket, 15. sliding bar, 16. limiting piece, 17. second connecting rod, 18. support rod, 19. first connecting rod, 20. mounting groove, 21. positioning hole, 22. sliding rod, 23. bolt, 24. limiting rod, 25. spring, 26. wedge groove. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example:

[0028] Refer to the attached Figure 1-5A structure for waterproofing pipe segments in shield construction includes a pipe segment 1. The upper parts of the connecting sides of the two connected pipe segments 1 are each provided with a groove, in which an upper sealing gasket 3 is bonded, and the lower parts are also provided with a groove, in which a lower sealing gasket 4 is bonded, thereby achieving a double waterproofing effect on the pipe segment 1.

[0029] One end of the pipe segment 1 is provided with a "mouth"-shaped snap-in groove 2, and the other end is integrally formed with a snap-in piece 12 that cooperates with the snap-in groove 11. During installation, the snap-in platform 2 is inserted into the snap-in groove 11 to achieve rapid alignment and installation of the two pipe segments 1.

[0030] A middle sealing gasket 14 squeezed by an extrusion mechanism is provided between the clamping piece 12 and the clamping groove 2 to realize the third waterproof function in the middle. Several extrusion mechanisms are arranged at equal intervals and act together on one middle sealing gasket 14 .

[0031] The extrusion mechanism includes a first connecting rod 19, a second connecting rod 17, and a sliding bar 15. A U-shaped mounting groove 20 is provided in the body of the tube segment 1 on the outer periphery of the clamping groove 2. A through sliding hole is provided in the side wall between the mounting groove 20 and the clamping groove 2. A sliding rod 22 is slidably arranged in the sliding hole. One end of the first connecting rod 19 is hinged to the middle of the sliding rod 22, and the other end is hinged to the end of the second connecting rod 17. The other end of the second connecting rod 17 is hinged to the sliding bar 15. The sliding bar 15 has a trapezoidal structure. A support rod 18 is fixedly provided on the outer side wall of the clamping groove 2. The support rod 18 is hinged to the middle of the first connecting rod 19.

[0032] The push sliding rod 22 moves to the left, driving the first connecting rod 19 hinged to the end of the push sliding rod 22 to move to the left. At the same time, under the action of the lever, the other end of the first connecting rod 19 will move to the right, further driving the second connecting rod 17 to move to the right, thereby pushing the sliding bar 15 to squeeze the middle sealing gasket 14 to the right.

[0033] Furthermore, in order to limit the second connecting rod 17 during its movement and prevent the second connecting rod 17 from twisting during its movement, a limiting member 16 for limiting the second connecting rod 17 is provided on the outer wall of the engaging groove 2 in this embodiment.

[0034] The upper and lower side walls of the clamping groove 2 are both provided with a wedge-shaped groove 26 that penetrates the installation groove 20. A wedge-shaped sealing strip 26 is provided in the wedge-shaped groove 26, thereby achieving upper and lower waterproof functions.

[0035] The sealing strip 26 is an inverted trapezoid, which is adapted to the wedge-shaped groove 26. The small head of the sealing strip 26 is located in the wedge-shaped groove 26, and the majority of the sealing strip 26 is located in the mounting groove 20. The sliding strip 15 is a trapezoidal structure, and the surface connecting it with the sealing strip 26 is an inverted inclined surface. When moving to the right, its inclined surface can squeeze the sealing strip 26 into the snap-fit ​​groove 2.

[0036] A positioning hole 21 is provided on the side wall of the mounting groove 20 , and a spring 25 is provided in the positioning hole 21 . One end of the spring 25 is fixed in the positioning hole 21 , and the other end is fixedly connected to the sliding rod 22 . During disassembly or assembly, the spring 25 automatically pushes the sliding rod 22 out of the positioning hole 21 .

[0037] The upper end surface of the tube segment 1 is provided with a plurality of vertical threaded holes 11 at equal intervals. The threaded holes 11 are staggered with the second connecting rod 17 to prevent obstruction by the second connecting rod 17 during bolt installation. The lower ends of the threaded holes 11 protrude from the bottom surface of the mounting groove 20. The clamping piece 12 is provided with a through hole 13 with the same structure as the threaded hole 11, and the lower end of the threaded hole 11 is provided with a rod hole 10 extending therethrough. When the side surfaces of the two tube segments 1 are in contact, the left side of the clamping piece 12 also contacts the side surface of the clamping groove 2.

[0038] The pipe segment 1 where the snap-in groove 2 is located is also provided with a screw hole, and the other pipe segment 1 is provided with a smooth hole. An annular gasket 8 is provided at the smooth hole and the screw hole where the two pipe segments 1 are connected, which can achieve the fourth waterproofing. Screws 7 are provided in the screw hole and the smooth hole and are fixed by nuts 6. When the nuts 6 are tightened, the two pipe segments 1 can be tightened by the pre-tightening force.

[0039] The screw rod 7 is provided with a limiting hole 9 , and after the screw rod 7 is tightened, the limiting hole 9 is correspondingly connected to the rod hole 10 .

[0040] A bolt 23 is provided in the threaded hole 11, and a limiting rod 24 is integrally formed at the bottom of the bolt 23. The limiting rod 24 is not provided with threads. The limiting rod 24 is provided through the rod hole 10 and the limiting hole 9, which can fix the tightened screw 7 and prevent the bolt 6 of the screw 7 from loosening, causing gaps in the pipe segment and a decrease in the waterproof function.

[0041] Furthermore, the bolts and nuts of this embodiment are both provided with rubber waterproof gaskets.

[0042] The use process of the present invention:

[0043] During installation, ensure that the surface of the pipe segment 1 is smooth, without holes and missing edges on the side, and that the pipe segment 1 and the upper sealing gasket 3, lower sealing gasket 4, and middle sealing gasket 14 are dry and free of dust and grease. An upper sealing gasket 3 is set on the upper part of the connecting side of the two connected pipe segments 1, and a lower sealing gasket 4 is set on the lower part. An annular gasket 8 is set at the smooth hole and screw hole where the two pipe segments 1 are connected. Align the clamping piece 12 of one pipe segment 1 with the clamping groove 2 of the other pipe segment 1, and then tighten the two pipe segments 1 against each other through a jack, and tighten the screw 7 at the same time. The pre-tightening force of the screw 7 will further tighten the two pipe segments 1. At this time, the limiting hole 9 of the screw 7 is aligned with the rod hole 1. 0 alignment; in the process of the clamping piece 12 being squeezed into the clamping groove 2, the sliding rod 22 will be pushed to the left, and then the first connecting rod 19 will be driven to rotate. In the process of the first connecting rod 19 rotating, the second connecting rod 17 will be driven to the right, and the sliding bar 15 will be pushed to the right at the same time. The inclined surface of the sliding bar 15 will squeeze the middle sealing gasket 14 to move into the clamping groove 2, thereby achieving further sealing of the clamping piece 12; after the clamping piece 12 is completely clamped into the clamping groove 2, the through hole 13 will be aligned with the threaded hole 11, and the bolt 23 will be screwed in to fix the clamping piece 12. At the same time, the limiting rod 24 will be inserted into the limiting hole 9 and the rod hole 10.

[0044] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof structure for segments in shield construction, comprising segments (1), characterized in that: An upper sealing gasket (3) is provided on the upper portion of the connecting side surfaces of the two connected pipe segments (1), and a lower sealing gasket (4) is provided on the lower portion; a clamping groove (2) is provided at one end of the pipe segment (1), and a clamping piece (12) that cooperates with the clamping groove (2) is provided at the other end; a middle sealing gasket (14) squeezed by an squeezing mechanism is provided between the clamping piece (12) and the clamping groove (2); The extrusion mechanism includes a first connecting rod (19), a second connecting rod (17) and a sliding bar (15); a U-shaped mounting groove (20) is provided on the outer periphery of the clamping groove (2); a through sliding hole is provided between the mounting groove (20) and the clamping groove (2); a sliding rod (22) is slidably provided in the sliding hole; one end of the first connecting rod (19) is hinged to the sliding rod (22), and the other end is hinged to the end of the second connecting rod (17); the other end of the second connecting rod (17) is hinged to the sliding bar (15); a support rod (18) is fixedly provided on the outer side wall of the clamping groove (2); the support rod (18) is hinged to the middle part of the first connecting rod (19); The upper and lower side walls of the clamping groove (2) are both provided with a wedge-shaped groove (26) that penetrates the mounting groove (20), a wedge-shaped sealing strip is provided in the wedge-shaped groove (26), most of the sealing strip is located in the mounting groove (20), and the sliding strip (15) is a trapezoidal structure, and its interface with the sealing strip is an inverted inclined surface; A positioning hole (21) is provided on the side wall of the mounting groove (20), and a spring (25) is provided in the positioning hole (21). One end of the spring (25) is fixed in the positioning hole (21), and the other end is fixedly connected to the sliding rod (22).

2. The waterproof structure for segments in shield construction according to claim 1, characterized in that: The pipe segment (1) is provided with a vertical threaded hole (11), and the threaded hole (11) and the second connecting rod (17) are arranged in a staggered manner. The clamping piece (12) is provided with a through hole (13) having the same structure as the threaded hole (11), and a rod hole (10) is provided at the lower end of the threaded hole (11) to penetrate the threaded hole (11).

3. The waterproof structure for segments in shield construction according to claim 2, characterized in that: The pipe segment (1) with the clamping groove (2) is also provided with a screw hole, and the other pipe segment (1) is provided with a smooth hole. Screws (7) are provided in the screw hole and the smooth hole and are fixed by a nut (6). A limiting hole (9) is provided on the screw (7). After the screw (7) is tightened, the limiting hole (9) and the rod hole (10) are correspondingly connected.

4. The waterproof structure for segments in shield construction according to claim 3, characterized in that: A bolt (23) is provided in the threaded hole (11), and a limiting rod (24) is integrally formed at the bottom of the bolt (23), and the limiting rod (24) is provided through the rod hole (10) and the limiting hole (9).

5. The waterproof structure for segments in shield construction according to claim 1, characterized in that: Its working principle is that an upper sealing gasket (3) is provided on the upper part of the connecting side of two connected pipe segments (1), a lower sealing gasket (4) is provided on the lower part, an annular gasket (8) is provided at the smooth hole and the screw hole where the two pipe segments (1) are connected, the clamping piece (12) of one pipe segment (1) is aligned with the clamping groove (2) of the other pipe segment (1), and then the two pipe segments (1) are pressed against each other by a jack, and the screw (7) is tightened at the same time. The pre-tightening force of the screw (7) will further tighten the two pipe segments (1), and at this time, the limiting hole (9) of the screw (7) is aligned with the rod hole (10); in the process of the clamping piece (12) being squeezed into the clamping groove (2), it will push The sliding rod (22) moves to the left, and then drives the first connecting rod (19) to rotate. During the rotation of the first connecting rod (19), the second connecting rod (17) will be driven to move to the right, and at the same time, the sliding bar (15) will be pushed to the right. The inclined surface of the sliding bar (15) will squeeze the middle sealing gasket (14) to move into the clamping groove (2), thereby achieving further sealing of the clamping piece (12); after the clamping piece (12) is completely clamped into the clamping groove (2), the through hole (13) will be aligned with the threaded hole (11), and the bolt (23) will be screwed in to fix the clamping piece (12). At the same time, the limiting rod (24) will be inserted into the limiting hole (9) and the rod hole (10).

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