Flexible water stop device

Abstract

The present invention provides a flexible water-stop device, including a flexible water-stop sleeve, a first connection assembly, a second connection assembly and a universal pull rod assembly, wherein the flexible water-stop sleeve is sleeved on the outer periphery of a concrete pipe, one end of the flexible water-stop sleeve is connected and fixed to the first connection assembly at the starting well entrance, the other end of the flexible water-stop sleeve is connected to the second connection assembly, the second connection assembly is sleeved on the end of the concrete pipe away from the starting well entrance, and the two ends of the universal pull rod assembly are respectively connected to the first connection assembly and the second connection assembly. During the pipe jacking operation, the present invention tightens the second connection assembly through the universal pull rod assembly to balance the axial pressure of the flexible water-stop sleeve. When the curved pipe jacking is performed, the concrete pipe at the starting well entrance will deviate. At this time, the end of the universal pull rod assembly away from the starting well entrance can be deviated with the concrete pipe at the same time as the corresponding end of the flexible water-stop sleeve, which can avoid the failure of the water-stop seal of the flexible water-stop device, thereby ensuring construction safety and reducing potential accidents.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking construction, and in particular to a flexible water-stopping device. Background Art

[0002] The water-stop seal at the entrance of the jacking starting well is a key device for jacking construction. During the jacking process, if the water-stop device at the hole does not meet the construction requirements, it will cause the loss of drag-reducing mud, the increase of jacking force, and even the influx of groundwater into the working well, resulting in failure of jacking. The existing water-stop seal between the hole of the starting well and the concrete pipe is generally fixed on the water-stop flange with an annular rubber plate, which is a single sealing structure. The inner diameter of the annular rubber plate is smaller than the outer diameter of the concrete pipe. When the first section of the concrete pipe enters the hole, the annular rubber plate forms a reverse bend along the outer wall of the concrete pipe. The reverse thrust during grouting is used to make the bend of the annular rubber plate fit on the outer wall of the concrete pipe, thereby achieving a water-stop sealing effect. When performing curved jacking, as the concrete pipe at the hole of the starting well deviates from the initial working position, a poor seal will occur, resulting in failure of the water-stop seal, which brings potential safety hazards to the jacking construction. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a flexible water-stopping device which, when performing curved pipe jacking, can prevent the concrete pipe at the starting well opening from deviating from the initial working position and causing a poor seal, thereby resulting in failure of the water-stopping seal, thereby ensuring construction safety and reducing potential accidents.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0005] A flexible water-stop device comprises a flexible water-stop sleeve, a first connecting assembly, a second connecting assembly and a universal pull rod assembly, wherein the flexible water-stop sleeve is sleeved on the outer periphery of a concrete pipe, one end of the flexible water-stop sleeve is connected to the first connecting assembly and fixed at an entrance of a starting well, the other end of the flexible water-stop sleeve is connected to the second connecting assembly, the second connecting assembly is sleeved on an end of the concrete pipe away from the entrance of the starting well, and both ends of the universal pull rod assembly are respectively connected to the first connecting assembly and the second connecting assembly.

[0006] According to the flexible water-stop device of the present invention, during the pipe jacking operation, the flexible water-stop sleeve is subjected to axial pressure, and the second connecting assembly is tightened by the universal tie rod assembly to balance the axial pressure of the flexible water-stop sleeve. When the curved pipe jacking is carried out, the concrete pipe at the starting well hole opening will be offset. At this time, the end of the universal tie rod assembly away from the starting well hole opening can be offset with the corresponding end of the flexible water-stop sleeve at the same time as the concrete pipe, which can avoid the failure of the water-stop seal of the flexible water-stop device, thereby ensuring construction safety and reducing accident hazards.

[0007] For the above technical solution, further improvements as described below can be made.

[0008] According to the flexible water-stopping device of the present invention, in a preferred embodiment, the flexible water-stopping sleeve includes a sheet structure at two ends and a curved ring structure respectively connected to the sheet structure at two ends.

[0009] The flexible water-stop sleeve of the above structural form and the curved annular structure are particularly suitable for water-stop sealing when the concrete pipe is offset at the starting hole of the curved jacking pipe. The sheet structures at both ends are double-sealed, which can further improve the sealing effect.

[0010] Specifically, in a preferred embodiment, the first connection assembly includes a pre-embedded flange embedded in the entrance of the starting well, and one end of the flexible water-stop sleeve is fixed to the pre-embedded flange by a clamping flange and an expansion bolt.

[0011] The first connecting assembly of the above-mentioned structural form has a simple structure, is easy to install and arrange, and can effectively ensure the stability and reliability of the connecting structure.

[0012] Specifically, in a preferred embodiment, the second connecting device includes a pressure-bearing flange sleeved on the concrete pipe, and the other end of the flexible water-stop sleeve is fixed to the pressure-bearing flange by a clamping flange and connecting bolts.

[0013] The second connection assembly of the above-mentioned structural form has a simple structure and is easy to install and arrange. It can effectively ensure that the universal tie rod assembly and the flexible water-stop sleeve are offset along with the concrete pipe under the premise of ensuring the stability and reliability of the connection structure.

[0014] Specifically, in a preferred embodiment, the clamping flange is a semicircular ring structure.

[0015] The clamping flange adopts a semicircular ring structure, which is easy to install and disassemble and can save materials.

[0016] Specifically, in a preferred embodiment, the universal tie rod assembly includes a universal joint with two ends respectively connected to the first connecting assembly and the second connecting assembly.

[0017] The use of a universal joint to tighten the second connecting component can make the water-stop device more flexible in moving with the concrete pipe, thereby making the working process of the water-stop device more stable and reliable and having a longer service life.

[0018] Specifically, in a preferred embodiment, both ends of the universal joint are connected to the first connecting assembly and the second connecting assembly through a mounting seat.

[0019] The universal joint is fixed by the mounting seat, the structure is stable and reliable, and it is easy to install and disassemble.

[0020] Furthermore, in a preferred embodiment, an adjustment assembly is provided between the end of the universal joint close to the entrance of the launching shaft and the mounting seat.

[0021] By providing the adjustment assembly, it is easy to adjust the installation length of the universal pull rod assembly, thereby effectively improving the applicability of the water-stopping device.

[0022] Specifically, in a preferred embodiment, the adjustment assembly includes a threaded hinge seat connected to the mounting seat, an adjustment screw having two ends respectively connected to the threaded hinge seat and the universal joint, and a locking nut sleeved on the adjustment screw.

[0023] The regulating assembly of the above structural form is easy to operate, simple in structure and stable and reliable.

[0024] Further, in a preferred embodiment, the universal tie rod assemblies are evenly spaced apart in the circumferential direction.

[0025] The universal tie rod assemblies are evenly distributed along the circumferential direction, which can make the entire water-stop device evenly stressed during operation, thereby ensuring the sealing effect to the greatest extent.

[0026] Compared with the prior art, the advantages of the present invention are that when performing curved pipe jacking, it can avoid the concrete pipe at the starting well opening from deviating from the initial working position to cause a poor seal, resulting in failure of the water-stop seal, thereby ensuring construction safety and reducing potential accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0028] Figure 1 The overall installation structure of the flexible water-stopping device according to the embodiment of the present invention is schematically shown;

[0029] Figure 2 Schematically shows Figure 1 A-axis cross-sectional structure.

[0030] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0032] Figure 1 The overall installation structure of the flexible water stopping device 10 according to the embodiment of the present invention is schematically shown. Figure 2 Schematically shows Figure 1 A-axis cross-sectional structure.

[0033] like Figure 1As shown, the flexible water-stop device 10 of an embodiment of the present invention comprises a flexible water-stop sleeve 1, a first connecting component 2, a second connecting component 3 and a universal pull rod assembly 4, wherein the flexible water-stop sleeve 1 is sleeved on the outer periphery of the concrete pipe 5, one end of the flexible water-stop sleeve 4 is connected to the first connecting component 2 and fixed at the starting well entrance 6, the other end of the flexible water-stop sleeve 1 is connected to the second connecting component 3, the second connecting component 3 is sleeved on one end of the concrete pipe 5 away from the starting well entrance 6, and the two ends of the universal pull rod assembly 4 are respectively connected to the first connecting component 2 and the second connecting component 3.

[0034] According to the flexible water-stop device of the embodiment of the present invention, during the pipe jacking operation, the flexible water-stop sleeve is subjected to axial pressure, and the second connecting assembly is tightened by the universal tie rod assembly to balance the axial pressure of the flexible water-stop sleeve. When the curved pipe jacking is carried out, the concrete pipe at the starting well hole opening will be offset. At this time, the end of the universal tie rod assembly away from the starting well hole opening can be offset with the concrete pipe at the same time as the corresponding end of the flexible water-stop sleeve, which can avoid the failure of the water-stop seal of the flexible water-stop device, thereby ensuring construction safety and reducing potential accidents.

[0035] like Figure 1 As shown, in this embodiment, the flexible waterproof sleeve 1 includes a sheet structure 11 at both ends and a curved ring structure 12 at both ends respectively connected to the sheet structure 11. The flexible waterproof sleeve of the above structural form, the curved ring structure is particularly suitable for water-stopping sealing when the concrete pipe at the starting hole of the curved jacking pipe is offset, and the sheet structures at both ends are double-sealed, thereby further improving the sealing effect. Preferably, as Figure 1 As shown, the curved annular structure can be a twin annular structure, which is easy to process and manufacture.

[0036] like Figure 1 As shown, specifically, in this embodiment, the first connection assembly 2 includes a pre-buried flange 21 pre-buried in the starting well entrance 6, and one end of the flexible water stop sleeve 1 is fixed to the pre-buried flange 21 by a clamping flange 22 and an expansion bolt 23. The first connection assembly of the above structural form has a simple structure, is easy to install and arrange, and can effectively ensure the stability and reliability of the connection structure.

[0037] like Figure 1 As shown, specifically, in this embodiment, the second connecting device 3 includes a pressure-bearing flange 31 sleeved on the concrete pipe 5, and the other end of the flexible water-stop sleeve 1 is fixed to the pressure-bearing flange 31 through a clamping flange 32 and a connecting bolt 33. The second connecting assembly of the above-mentioned structural form has a simple structure and is easy to install and arrange. It can effectively ensure that the universal tie rod assembly and the flexible water-stop sleeve are offset with the concrete pipe under the premise of effectively ensuring the stability and reliability of the connection structure.

[0038] like Figure 1As shown, specifically, in this embodiment, the clamping flanges 22 and 32 are both semicircular ring structures. The clamping flanges are semicircular ring structures, which are easy to install and disassemble and can save materials.

[0039] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, the universal tie rod assembly 4 includes a universal joint 41 with two ends respectively connected to the first connecting assembly 2 and the second connecting assembly 3. By using the universal joint to tighten the second connecting assembly, the process of the water-stop device moving with the concrete pipe can be made more flexible, thereby making the working process of the water-stop device more stable and reliable, and the service life longer. Specifically, in this embodiment, both ends of the universal joint 41 are connected to the clamping flange 22 and the clamping flange 32 through the mounting seat 42. The universal joint is fixed by the mounting seat, and the structure is stable and reliable, and it is easy to install and disassemble. Specifically, the end of the universal joint 41 away from the starting shaft entrance 6 is connected to the mounting seat 42 through a pin 43, and the mounting seat 42 is fixed together with the clamping flange 22 and the clamping flange 32 by bolts.

[0040] like Figure 2 As shown, further, in the present embodiment, an adjustment assembly is provided between one end of the universal joint 41 close to the starting shaft entrance 6 and the mounting seat 42. By providing the adjustment assembly, it is easy to adjust the installation length of the universal pull rod assembly, thereby effectively improving the applicability of the water-stopping device. Specifically, in the present embodiment, the adjustment assembly includes a threaded hinge seat 44 connected to the mounting seat 42 through a pin shaft 43, an adjustment screw 45 connected to the threaded hinge seat 44 and the universal joint 41 at both ends, and a locking nut 46 sleeved on the adjustment screw 45. After the installation length of the universal pull rod assembly 4 is adjusted into place, it is locked with the locking nut 46. The adjustment assembly of the above-mentioned structural form is easy to operate, simple in structure, and stable and reliable.

[0041] Furthermore, in this embodiment, the universal tie rod assemblies 4 are evenly spaced in the circumferential direction. Preferably, the four groups of universal tie rod assemblies 4 are evenly distributed in the circumferential direction, and both ends of the adjusting screw 45 in the universal tie rod assemblies 4 are designed to be positive and negative threads, and the installation length of the universal tie rod assemblies is adjusted by adjusting the screw 45. The universal tie rod assemblies are evenly distributed in the circumferential direction, so that the entire water stop device can be evenly stressed during operation, thereby ensuring the sealing effect to a great extent.

[0042] According to the above embodiments, it can be seen that the flexible water-stopping device involved in the present invention can avoid the concrete pipe at the starting well opening from deviating from the initial working position and causing poor sealing when performing curved pipe jacking, thereby causing failure of the water-stopping seal, thereby ensuring construction safety and reducing potential accidents.

[0043] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flexible water-stopping device, It is characterized in that It includes a flexible water stop sleeve, a first connection assembly, a second connection assembly and a universal pull rod assembly; wherein, The flexible water-stop sleeve is sleeved on the outer periphery of the concrete pipe; One end of the flexible waterproof sleeve is connected to the first connection component and fixed at the starting well entrance, and the other end of the flexible waterproof sleeve is connected to the second connection component, and the second connection component is sleeved on the end of the concrete pipe away from the starting well entrance; Two ends of the universal tie rod assembly are respectively connected to the first connecting assembly and the second connecting assembly; The flexible water stop sleeve comprises a sheet structure at two ends and a curved ring structure at two ends respectively connected to the sheet structure; The first connection assembly includes a pre-buried flange pre-buried in the entrance of the launch well, and one end of the flexible waterproof sleeve is fixed to the pre-buried flange by a clamping flange and an expansion bolt; The second connection assembly comprises a pressure-bearing flange sleeved on the concrete pipe, and the other end of the flexible water-stop sleeve is fixed to the pressure-bearing flange through the clamping flange and the connecting bolts; The universal pull rod assembly comprises a universal joint whose two ends are respectively connected to the first connecting assembly and the second connecting assembly, and an adjustment assembly is arranged between the end of the universal joint close to the launch shaft entrance and the mounting seat; The adjustment assembly comprises a threaded hinge seat connected to the mounting seat, an adjustment screw having two ends respectively connected to the threaded hinge seat and the universal joint, and a locking nut sleeved on the adjustment screw.

2. The flexible water-stopping device according to claim 1, It is characterized in that The clamping flange is a semicircular ring structure.

3. The flexible water stopping device according to claim 1, It is characterized in that Both ends of the universal joint are connected to the first connecting component and the second connecting component through a mounting seat.

4. The flexible water stopping device according to claim 1 or 2, It is characterized in that The universal tie rod assemblies are evenly spaced apart in the circumferential direction.

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