Pipe jacking reusable hole opening water stop device

Abstract

A sleeve comprises a sleeve body and a connecting flange arranged on the sleeve body, an embedded part used for fixing the connecting flange is arranged at a starting well opening, a jacking channel used for jacking of the jacking pipe is formed in the middle of the sleeve body, an annular installation groove is formed in the sleeve body, and the annular installation groove is formed in the sleeve body. The annular water stop component comprises an annular installation piece, an annular adjusting body and an annular water stop piece which are concentrically arranged in sequence, the annular installation piece is installed in the annular installation groove, the sleeve is provided with a fixing assembly for fixing the annular installation piece, and at least part of the annular adjusting body is located in the annular installation groove. According to the hole opening water stopping device capable of being repeatedly used for the jacking pipe, when the water pressure of the hole opening changes or the jacking pipe has working condition changes such as displacement, the annular adjusting body recovers to the original set shape, expansive force is generated, the annular water stopping piece is pushed to move towards the jacking pipe, and therefore the annular water stopping piece is further tightly attached to the outer wall of the jacking pipe, and the water stopping effect is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pipe jacking construction technology, especially to a pipe jacking reuse hole water stop device. BACKGROUND

[0002] Pipe jacking construction is a trenchless construction method, which is a pipe laying construction technology without or with less excavation. This method has many advantages. Pipe jacking construction has little impact on the ground traffic. The construction area is relatively small when pipe jacking construction is carried out. Pipe jacking construction can cross railways, highways, rivers, etc., saving costs. The noise generated during pipe jacking construction is small, which does not interfere with the daily life of residents.

[0003] In the slurry balance pipe jacking construction process, slurry pressure is very critical. By precisely controlling the slurry pressure, the slurry pressure, the ground water pressure, and the excavation face soil pressure are kept in dynamic balance to ensure the stability of the excavation face soil and prevent collapse. With excavation advancing, slurry is continuously injected and discharged. When jacking, friction-reducing slurry is injected into the gap between the outer wall of the pipe and the soil to form a lubricating film, reduce friction, allow the pipe to smoothly jack, reduce equipment load, improve construction efficiency, and reduce pipe wear.

[0004] In pipe jacking construction, the hole water stop of the starting well and the receiving well is crucial. If the water stop measure is improper, slurry will flow into the shaft, causing soil loss, causing surface subsidence, affecting the safety of ground buildings and underground pipelines, and reducing the flow of friction-reducing slurry into the working well, which will erode and damage the equipment, causing waste. However, the existing pipe jacking single-layer waterproof collar device has limitations. The structure is easily deformed and fails under external force, and the water stop effect decreases. Moreover, it cannot automatically adjust according to the real-time changes of the hole water pressure. When the water pressure rises, slurry is easily seeped from the hole gap, which brings safety hazards and quality risks to construction and seriously affects the progress of the project. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a pipe jacking reuse hole water stop device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A pipe jacking reuse hole water stop device comprises:

[0008] A sleeve comprises a cylinder and a connecting flange arranged on the cylinder. A pre-buried part is arranged at the hole of the starting well to fix the connecting flange. A jacking channel for pipe jacking is formed in the middle of the cylinder.

[0009] The annular water stop member is provided with an annular mounting groove in the inner part of the barrel, and comprises an annular mounting part, an annular adjusting body and an annular water stop part arranged concentrically in sequence, the annular mounting part is mounted in the annular mounting groove, the sleeve is provided with a fixing assembly for fixing the annular mounting part, the annular adjusting body is at least partially located in the annular mounting groove, and the annular adjusting body can extend or contract in the radial direction of the annular mounting part to adjust the position of the annular water stop part.

[0010] The pipe jacking reuse hole water stop device has the annular mounting part provided with an upper annular plate and a lower annular plate, the upper annular plate, the annular mounting part and the lower annular plate form an annular opening cavity for mounting the annular adjusting body, and the annular water stop part closes the annular opening cavity.

[0011] The pipe jacking reuse hole water stop device has the annular adjusting body comprising a plurality of 8-shaped memory alloy parts arranged in sequence in the circumferential direction of the annular mounting part.

[0012] The pipe jacking reuse hole water stop device has the annular mounting part provided with a heating element for heating the memory alloy parts.

[0013] The pipe jacking reuse hole water stop device has the annular mounting groove being an annular opening groove formed inward from the opening of the barrel, and the inner wall of the annular opening groove is provided with a plurality of axial sliding grooves arranged in sequence and spaced apart in the circumferential direction of the barrel.

[0014] The pipe jacking reuse hole water stop device has the annular opening groove provided with an arc-shaped limiting groove at the end away from the connecting flange, the arc-shaped limiting groove corresponds to and communicates with the axial sliding groove.

[0015] The pipe jacking reuse hole water stop device has the outer side wall of the annular mounting part provided with a plurality of arc-shaped sliding blocks arranged in sequence and spaced apart in the circumferential direction of the annular mounting part, and the arc-shaped sliding blocks can move along the axial sliding groove and the arc-shaped limiting groove.

[0016] The pipe jacking reuse hole water stop device has the arc-shaped sliding block provided with a first locking screw hole, and the bottom of the arc-shaped limiting groove is provided with a fixed screw hole.

[0017] The pipe jacking repeatedly uses the hole water stop device, the fixed assembly includes an annular fixed plate and a fixed bolt, a plurality of arc-shaped fixed blocks are arranged on the annular fixed plate, a limiting block is arranged at the bottom of the arc-shaped fixed block, the arc-shaped fixed blocks correspond to the axial sliding grooves one by one, the arc-shaped fixed blocks are provided with second locking screw holes, and the fixed bolt can pass the second locking screw holes, the first locking screw holes and be fixed in the fixed screw holes in sequence.

[0018] In the above technical scheme, the pipe jacking repeatedly uses the hole water stop device, which comprises a sleeve and an annular water stop component, the sleeve comprises a cylinder and a connecting flange arranged on the cylinder, the annular water stop component comprises an annular mounting member, an annular adjusting body and an annular water stop member arranged concentrically, the annular mounting member is mounted in an annular mounting groove in the cylinder, the annular adjusting body can be radially elongated or contracted to adjust the position of the annular water stop member, and in the use process, in the normal pipe jacking process, the annular water stop member is in close contact with the outer wall of the pipe, relies on the elasticity and sealing property thereof, and prevents mud water from seeping out of the hole gap; when the hole water pressure changes or the pipe jacking appears displacement and other working condition changes, the annular adjusting body returns to the original set shape, generates an expansion force, and pushes the annular water stop member to move towards the pipe jacking direction, so that the annular water stop member is further closely attached to the outer wall of the pipe jacking, and the water stop effect is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0020] Figure 1 A structure schematic view of a pipe jacking repeatedly used hole water stop device provided by another embodiment of the present application is provided.

[0021] Figure 2 A structure schematic view of a pipe jacking repeatedly used hole water stop device provided by another embodiment of the present application is provided. Figure 1 An enlarged view of A in the middle;

[0022] Figure 3 An internal structure schematic view of a cylinder provided by another embodiment of the present application is provided.

[0023] Figure 4 A structure schematic view of an annular water stop component provided by another embodiment of the present application is provided.

[0024] Figure 5 A top view of a cylinder provided by another embodiment of the present application is provided.

[0025] Figure 6The utility model provides an annular fixed plate's structure schematic diagram for another embodiment of the utility model.

[0026] Mark explanation:

[0027] 1, sleeve; 11, connecting flange;12, annular mounting groove;13, axial sliding slot;14, arc limiting groove;15, fixed threaded hole;16, barrel;2, annular water stop component;21, annular mounting piece;211, lower annular plate;212, upper annular plate;213, arc sliding block;214, first locking screw hole;22, annular adjusting body;221, memory alloy piece;23, annular water stop piece;3, fixed assembly;31, annular fixed plate;32, fixed bolt;33, arc fixed block;34, limiting block;35, sealing gasket;36, second locking screw hole;4, top pipe. Specific implementation

[0028] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be introduced further in detail below in conjunction with the drawings.

[0029] As Figures 1-6 Indicated, the utility model provides a kind of top pipe reuse hole water stop device, including sleeve 1 and annular water stop component 2, sleeve 1 includes barrel 16 and the connecting flange 11 being set on barrel 16, is set with the embedded part for the fixed connecting flange 11 at the starting well hole mouth, top channel for top pipe 4 jacking is formed in barrel 16 middle, the inside of barrel 16 is provided with annular mounting groove 12, annular water stop component 2 includes concentric sequentially arranged annular mounting piece 21, annular adjusting body 22 and annular water stop piece 23, annular mounting piece 21 is installed in annular mounting groove 12, sleeve 1 is provided with the fixed assembly 3 for the fixed annular mounting piece 21, annular adjusting body 22 is at least partially located in annular mounting groove 12, annular adjusting body 22 can contract along its radial direction to adjust the position of annular water stop piece 23.

[0030] Specifically, sleeve 1 includes integrally arranged barrel 16 and connecting flange 11, the size of barrel 16 is correspondingly arranged with starting well hole mouth and top pipe 4.Barrel 16 is made of high-strength steel material, has enough strength and rigidity to bear various external forces in the construction process of top pipe 4. The inside of barrel 16 is hollow to form top channel for the smooth jacking of top pipe 4. Embedded part is set in advance at starting well hole mouth, and connecting flange 11 is firmly fixed with embedded part by bolt and the like connecting piece, so as to stably install sleeve 1 in starting well hole mouth.

[0031] In the embodiment, the inner part of the barrel 16 is provided with an annular mounting groove 12, the size of the annular mounting groove 12 is consistent with the annular water stop component 2, so as to ensure the tightness and stability of the annular water stop component installation. The annular water stop component 2 is composed of an annular mounting part 21, an annular adjusting body 22 and an annular water stop part 23 which are concentrically and sequentially arranged from outside to inside. The annular mounting part 21 is made of a metal material which is suitable for the material of the barrel 16, and the shape and size of the annular mounting part 21 completely fit the annular mounting groove 12 in the inner part of the barrel 16. In the use process, the annular mounting part 21 is installed in the annular mounting groove 12 and is fixed by the fixing assembly 3 arranged on the sleeve 1, so as to ensure that the displacement does not occur in the construction process.

[0032] In the embodiment, the annular adjusting body 22 is located at the inner side of the annular mounting part 21. When the annular water stop component 2 is installed, the annular adjusting body 22 can be located in the annular mounting groove 12 in the initial state or can be partially located in the annular mounting groove 12. Preferably, the annular adjusting body 22 is made of a shape memory alloy, and the shape memory alloy can be selected from a nickel-titanium alloy wire which has super-elasticity and good shape memory effect, or other shape memory alloys. The annular water stop part 23 is located at the innermost side and is integrally arranged with the annular adjusting body 22, and the annular water stop part 23 directly contacts the pipe 4 and plays a water stopping role. The annular water stop part 23 is made of a high-performance and heat-insulating material, has good flexibility, sealing property, durability and heat-insulating effect, and can effectively prevent mud water from seeping out from the hole gap.

[0033] The pipe reuse hole water stopping device provided by the utility model, which comprises a sleeve 1 and an annular water stop component 2, the sleeve 1 comprises a barrel 16 and a connecting flange 11 arranged on the barrel 16, the annular water stop component 2 comprises an annular mounting part 21, an annular adjusting body 22 and an annular water stop part 23 which are concentrically and sequentially arranged, the annular mounting part 21 is installed in the annular mounting groove 12 in the inner part of the barrel 16, the annular adjusting body 22 can be radially contracted to adjust the position of the annular water stop part 23, in the use process, in the normal jacking process of the pipe 4, the annular water stop part 23 is in close contact with the outer wall of the pipe 4, relies on the elasticity and sealing property thereof, prevents mud water from seeping out from the hole gap, when the hole water pressure changes or the pipe 4 appears displacement and other working condition changes, the shape memory alloy wire restores to the original set shape, generates expansion force, pushes the annular water stop part 23 to move towards the pipe 4, so as to further tightly fit the outer wall of the pipe 4 and enhance the water stopping effect.

[0034] In the embodiment of the utility model, preferably, the annular mounting piece 21 is provided with an upper annular plate 212 and a lower annular plate 211, the upper annular plate 212, the annular mounting piece 21 and the lower annular plate 211 form an annular opening cavity for installing the annular adjusting body 22, and the annular water stop piece 23 closes the annular opening cavity.The upper annular plate 212, the annular mounting piece 21 and the lower annular plate 211 are of an integrated structure, so that during installation, the annular adjusting body 22 is installed in the annular opening cavity.

[0035] In the embodiment of the utility model, preferably, the annular adjusting body 22 comprises a plurality of memory alloy pieces 221 in the shape of 8, the plurality of memory alloy pieces 221 are sequentially arranged along the circumference of the annular mounting piece 21 to form an annular structure, so as to ensure consistent performance and uniform stress in the circumferential direction, and a part of the annular adjusting body 22 formed by the memory alloy pieces 221 is located in the annular opening cavity, and another part is arranged in the annular water stop piece 23; the annular mounting piece 21 is provided with a heating element for heating the memory alloy pieces 221, and the heating element is connected with an external control unit through a pre-buried wire pipe, so that when the water pressure of the hole opening fluctuates or the pipe jacking 4 is displaced, the control unit sends a power-on instruction to the heating element. The heating element is powered on to heat up, the heat is transmitted to the memory alloy pieces 221, the memory alloy pieces 221 are elongated along the radial direction when the temperature exceeds the phase transition temperature, and the memory alloy pieces 221 return to the original set shape, so as to push the annular water stop piece 23 to move towards the pipe jacking 4, so as to further closely fit the outer wall of the pipe jacking 4, and after the working condition is normal, the control unit controls the heating element to be powered off. The memory alloy pieces 221 are cooled to below the phase transition temperature to keep the contracted shape.

[0036] In the embodiment of the utility model, during use of the sleeve 1 and the annular water stop member 2, the installation steps are as follows:

[0037] Step 1: during construction of the hole opening of the starting well, the pre-buried piece is accurately arranged according to the design requirement.

[0038] Step 2: installation of the annular water stop member 2: the annular mounting piece 21 is placed in the annular mounting groove 12 inside the cylinder body 16, and the annular mounting piece 21 is ensured to closely fit each part of the mounting groove. The annular mounting piece 21 is firmly fixed in the annular mounting groove 12 by using the fixing assembly 3 arranged on the sleeve 1;

[0039] Step 3: installation of the sleeve 1: the sleeve 1 with the installed annular water stop member 2 is hoisted to the hole opening of the starting well, so that the connecting flange 11 of the sleeve 1 is aligned with the pre-buried piece. The connecting flange 11 and the pre-buried piece are tightly fixed by connecting pieces such as bolts, so as to ensure firm installation of the sleeve 1, and the axis of the cylinder body 16 coincides with the design jacking axis of the pipe jacking 4.

[0040] Step 4: adjustment during construction:

[0041] Normal pipe jacking 4 stage, in the normal pipe jacking process of pipe jacking 4, annular water stop 23 is in close contact with the outer wall of pipe jacking 4, and mud water is prevented from seeping out from the gap of the hole by relying on its own elasticity and sealing property.

[0042] Working condition change adjustment stage: when the water pressure of the hole fluctuates or the pipe jacking 4 is displaced, the control unit sends a power-on instruction to the heating element. The heating element is powered on to heat up, and the heat is transmitted to the memory alloy piece 221. When the temperature exceeds the phase transition temperature, the memory alloy piece 221 is elongated in the radial direction, returns to the original set shape, generates an expansion force, and pushes the annular water stop 23 to move towards the pipe jacking 4, so as to further tightly fit the outer wall of the pipe jacking 4 and enhance the water stopping effect. After the working condition is normal, the control unit controls the heating element to be powered off. The memory alloy piece 221 is cooled below the phase transition temperature and remains in the contracted shape.

[0043] In another embodiment of the utility model, preferably, in order to facilitate the installation and disassembly of the annular water stopping member 2, the annular mounting groove 12 is an annular opening groove formed by extending inward from the opening of the cylinder body 16. In this way, during installation, the annular water stopping member 2 can be placed into the annular opening groove from the opening of the cylinder body 16 until the annular water stopping member 2 abuts against the bottom wall at the bottom of the annular opening groove.

[0044] In another embodiment of the utility model, preferably, a plurality of axial sliding grooves 13 are arranged on the inner wall of the annular opening groove, the plurality of axial sliding grooves 13 are arranged in sequence and at intervals along the circumference of the cylinder body 16, one end of the annular opening groove away from the connecting flange 11 is provided with an arc-shaped limiting groove 14, the arc-shaped limiting groove 14 is in communication with the axial sliding groove 13 one by one, that is, a plurality of arc-shaped limiting grooves 14 are arranged at the bottom position of the annular opening groove, each arc-shaped limiting groove 14 is arranged along the circumference of the cylinder body 16, and the plurality of arc-shaped limiting grooves 14 are arranged in sequence and at intervals along the circumference of the cylinder body 16.

[0045] In another embodiment of the utility model, preferably, a plurality of arc-shaped sliding blocks 213 are arranged on the outer side wall of the annular mounting piece 21, the plurality of arc-shaped sliding blocks 213 are sequentially and spaced apart along the circumference of the annular mounting piece 21, the arc-shaped sliding block 213 can move along the axial sliding groove 13 and the arc-shaped limiting groove 14, along the circumference of the cylinder body 16, the length of the arc-shaped limiting groove 14 is 1.5 times the length of the arc-shaped sliding block 213, so in the installation process, firstly, each arc-shaped sliding block 213 is corresponded to the axial sliding groove 13 one by one, the arc-shaped sliding block 213 is slid along the axial sliding groove 13 to the bottom of the annular opening groove, then the annular mounting piece 21 is rotated, so that each arc-shaped sliding block 213 is rotated and clamped into the arc-shaped limiting groove 14, at this time, half of the arc-shaped sliding block 213 is located in the arc-shaped limiting groove 14 (for the convenience of description, this part is called the clamped limiting part), and the other half is located in the axial sliding groove 13 (for the convenience of description, this part is called the exposed fixing part), and at this time, a bottom insertion gap is formed between the arc-shaped sliding block 213 and the axial sliding groove 13, and the size of the bottom insertion gap is equal to half of the circumferential length of the arc-shaped sliding block 213.

[0046] In another embodiment of the utility model, preferably, a first locking screw hole 214 is arranged on the arc-shaped sliding block 213, the first locking screw hole 214 is located on the exposed fixing part, and a fixed screw hole 15 is arranged at the bottom of the arc-shaped limiting groove 14.

[0047] In another embodiment of the utility model, preferably, the fixing assembly 3 comprises an annular fixing plate 31 and a fixing bolt 32, a plurality of arc-shaped fixing blocks 33 are arranged on the annular fixing plate 31, the size of the arc-shaped fixing block 33 corresponds to the axial sliding groove 13, the arc-shaped fixing block 33 corresponds to the axial sliding groove 13 one by one, a second locking screw hole 36 is arranged on the arc-shaped fixing block 33, the fixing bolt 32 can sequentially pass through the second locking screw hole 36, the first locking screw hole 214 and be fixed in the fixed screw hole 15, a limiting block 34 is arranged at the bottom of the arc-shaped fixing block 33, and the size of the limiting block 34 is equal to half of the circumferential length of the arc-shaped sliding block 213, so that the limiting block 34 can be inserted into the bottom insertion gap, and the arc-shaped sliding block 213 is limited.

[0048] In another embodiment of the utility model, when the annular water stop member 2 is installed, the installation steps are as follows:

[0049] Firstly, each arc-shaped sliding block 213 on the annular mounting piece 21 corresponds to the axial sliding groove 13 one by one, and the arc-shaped sliding block 213 is slid along the axial sliding groove 13 to the bottom of the annular opening groove;

[0050] Second step, rotate the ring mounting 21, so that each arc-shaped slider 213 is rotated into the arc-shaped limiting slot 14, at this time, the arc-shaped slider 213 is half in the arc-shaped limiting slot 14 and half in the axial sliding slot 13, and a bottom insertion gap is formed between the arc-shaped slider 213 and the axial sliding slot 13, and the first locking screw hole 214 is coaxial with the fixed threaded hole 15;

[0051] Third step, the arc-shaped fixed block 33 on the ring fixed plate 31 is corresponding to the axial sliding slot 13, the arc-shaped fixed block 33 slides along the axial sliding slot 13 until the arc-shaped fixed block 33 is abutted with the exposed fixed part of the arc-shaped slider 213, at this time, the limiting block 34 is just clamped into the bottom insertion gap, the second locking screw hole 36 is coaxial with the first locking screw hole 214, then each fixed bolt 32 can be sequentially threaded into the second locking screw hole 36, the first locking screw hole 214 and fixed in the fixed threaded hole 15, thereby completing the installation of the ring water stop member 2, then the ring-shaped sealing gasket 35 can be covered on the ring fixed plate 31 for protection.

[0052] The above only describes certain exemplary embodiments of the present application by way of illustration, without doubt, for ordinary skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the present application.

Claims

1. A push pipe reuse hole port water stop device characterized by, The utility model relates to a sleeve for pipe jacking, comprising a barrel and a connecting flange arranged on the barrel, wherein a pre-buried part for fixing the connecting flange is arranged at a starting well hole, and a jacking channel for pipe jacking is formed in the barrel; an annular water stop member is arranged in the barrel, and the annular water stop member comprises an annular mounting part, an annular adjusting body and an annular water stop part arranged in sequence and concentrically, the annular mounting part is arranged in an annular mounting groove, a fixing assembly for fixing the annular mounting part is arranged on the sleeve, and the annular adjusting body is at least partially arranged in the annular mounting groove and can extend or contract in the radial direction of the annular mounting part to adjust the position of the annular water stop part. The annular mounting part is provided with an upper annular plate and a lower annular plate, and the upper annular plate, the annular mounting part and the lower annular plate form an annular open cavity for mounting the annular adjusting body, and the annular water stop part seals the annular open cavity. The annular adjusting body comprises a plurality of memory alloy parts in the shape of an 8, and the plurality of memory alloy parts are arranged in sequence in the circumferential direction of the annular mounting part.

2. The push pipe reuse hole closure waterstop of claim 1, wherein, The annular mounting part is provided with a heating element for heating the memory alloy parts.

3. The push pipe re-use hole closure waterstop of claim 2, wherein, The annular mounting groove is an annular open groove formed inward from the opening of the barrel, and a plurality of axial sliding grooves are arranged in sequence and spaced apart in the circumferential direction of the barrel on the inner wall of the annular open groove.

4. The push pipe re-use hole closure waterstop of claim 3, wherein, An arc-shaped limiting groove is arranged at one end of the annular open groove away from the connecting flange, and the arc-shaped limiting groove corresponds to and communicates with the axial sliding grooves.

5. The push pipe re-use hole closure waterstop of claim 1, wherein, A plurality of arc-shaped sliding blocks are arranged in sequence and spaced apart in the circumferential direction of the annular mounting part on the outer side wall of the annular mounting part, and the arc-shaped sliding blocks can move along the axial sliding grooves and the arc-shaped limiting groove.

6. The push pipe re-use hole closure waterstop of claim 5, wherein, A first locking screw hole is arranged on the arc-shaped sliding block, and a fixed threaded hole is arranged at the bottom of the arc-shaped limiting groove.

7. The push pipe re-use hole closure waterstop of claim 6, wherein, The fixing assembly comprises an annular fixing plate and a fixing bolt, a plurality of arc-shaped fixing blocks are arranged on the annular fixing plate, a limiting block is arranged at the bottom of the arc-shaped fixing block, the arc-shaped fixing blocks correspond to the axial sliding grooves, a second locking screw hole is arranged on the arc-shaped fixing block, and the fixing bolt can pass through the second locking screw hole, the first locking screw hole and be fixed in the fixed threaded hole in sequence.

8. The push pipe re-use hole closure waterstop of claim 7, wherein, ​ 9. The push pipe re-use hole closure waterstop of claim 8, wherein, ​

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