Double-layer waterstop device for slurry balance pipe hole

Abstract

This utility model relates to the field of municipal pipe jacking construction technology, specifically to a double-layer water-stopping device for the opening of a slurry-balanced pipe jacking tunnel. The device includes an annular fixing plate fixed to the outside of the opening in the inner lining wall. A first water-stopping structure, an annular fixing steel plate, and a second water-stopping structure are sequentially stacked and fixed through holes. The first and second water-stopping structures are identical, both consisting of a rubber water-stopping ring and several water-stopping flaps evenly arranged along its inner ring, with the two structures rotated and staggered. This double-layer structure design significantly improves sealing performance and reliability, effectively preventing sealing failure caused by high slurry pressure, groundwater seepage pressure, and vibration impact during pipe jacking construction. Even if one layer of the water-stopping structure is damaged, the other layer can still continue to function, ensuring the safety and continuity of the construction process.

Description

Technical Field

[0001] This utility model relates to the field of municipal pipe jacking construction technology, specifically to a double-layer water-stopping device for the opening of a slurry-water balance pipe jacking tunnel. Background Technology

[0002] With the acceleration of urbanization, road upgrading and reconstruction projects are increasing. Slurry-balanced pipe jacking technology, due to its advantages in precise control of surface settlement and adaptability to complex geological conditions, is widely used in municipal engineering, rail transit, and other fields. Slurry-balanced pipe jacking requires the use of slurry to balance soil pressure, ensuring soil stability in front of the cutterhead, and transporting the soil to the slurry pool outside the shaft. The water-stopping device at the tunnel entrance, as the core sealing component of the slurry-balanced pipe jacking system, directly affects the success or failure of the construction: on the one hand, it must withstand the high pressure of slurry, groundwater seepage pressure, and vibration impact from pipe jacking construction; on the other hand, it must adapt to complex geological conditions such as soft strata and fault fracture zones, while meeting the requirements of rapid installation and stable operation. In this example, the groundwater level is high at the location of the pipe jacking starting shaft, posing a risk of water inrush after the pipe jacking breaks through the tunnel entrance. If the outflow of groundwater inside the tunnel entrance cannot be effectively prevented, it will significantly impact project safety and construction progress.

[0003] Chinese utility model patent application number 202322931117.9 discloses a water-stopping device for preventing outward overturning of a pipe jacking opening. This device uses a fixed plate and a pin sleeve to engage a flap, tightly pressing the flap against a rubber water-stop ring to improve its stability and prevent it from overturning due to water flow impact. However, the flap in this design is conical, creating gaps between adjacent flaps after the flap presses down on the rubber water-stop ring. In high-pressure environments, the rubber water-stop ring risks slipping out through these gaps, causing seal failure and making it unsuitable for high-pressure environments. Furthermore, this design has only a single-layer structure; seal failure could lead to production accidents, lacking sealing redundancy. The fixed flap limits its applicability to pipes of a single specification, and the device lacks a guiding mechanism for the inserted pipe; movement between the pipe and the device relies solely on friction, which can easily damage the pipe or the sealing device. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a double-layer water-stopping device for the opening of a slurry-water balance pipe jacking tunnel. By setting a double-layer water-stopping structure, this utility model solves the problems of existing single-layer sealing not being tight and difficult to apply to high-pressure environments. At the same time, the adjustable structure expands the scope of application.

[0005] The technical solution adopted by this utility model is: a double-layer water-stopping device for the opening of a slurry-water balance jacking pipe, including an annular fixing plate fixed on the outside of the opening of the inner lining wall, which is provided with a plurality of holes. A first water-stopping structure is fixed on the outside of the annular fixing plate through the holes. A second water-stopping structure is superimposed and fixed on the first water-stopping structure by an annular fixing steel plate. The annular fixing plate, the first water-stopping structure, the annular fixing steel plate and the second water-stopping structure are sequentially superimposed and fixed on the outside of the opening of the inner lining wall, and their centers are located on the same straight line.

[0006] As a preferred embodiment, the first water-stopping structure is the same as the second water-stopping structure, both consisting of a rubber water-stopping ring and several water-stopping flaps. The water-stopping flaps are evenly arranged along the inner circumference of the rubber water-stopping ring, and the water-stopping flaps of the second water-stopping structure are staggered with those of the first water-stopping structure.

[0007] As a preferred embodiment, the water-stop flap is composed of a fixed plate, a water-stop plate, and a roller. The fixed plate is provided with an adjustment groove for adjusting the position of the water-stop flap. Bolts pass through the adjustment groove to fix the fixed plate on the rubber water-stop ring. The water-stop plate is connected to the fixed plate through the roller. The water-stop plate is also provided with a guide pulley for guiding the pipeline.

[0008] As a preferred embodiment, the annular fixing steel plate is an annular steel plate with an "I"-shaped cross-section, and its upper and lower surfaces are provided with fixing through holes for connecting the first water-stop structure and the second water-stop structure.

[0009] As a preferred embodiment, the inner diameter of the annular fixing plate is larger than the outer diameter of the jacking pipe.

[0010] The beneficial effects of this utility model are:

[0011] To address the shortcomings of existing technologies, this invention provides a double-layer water-stopping device for the opening of a slurry-water balanced pipe jacking tunnel. Through optimized structural design, this invention achieves the following technical advantages:

[0012] Firstly, this utility model, through the setting of a ring-shaped fixing plate, a double-layer water-stop structure (both composed of rubber water-stop rings and several water-stop flaps, which are rotated and staggered, with the water-stop flaps of the second water-stop structure located at the gap between adjacent water-stop flaps on the first water-stop structure), and a ring-shaped fixing steel plate, etc., the double-layer structure design greatly improves the sealing performance and reliability, effectively preventing sealing failure caused by high pressure of mud and water, groundwater seepage pressure, and vibration impact during pipe jacking construction. Even if one layer of the water-stop structure is damaged, the other layer can still continue to function, ensuring the safety and continuity of the construction process.

[0013] Secondly, the adjustable design of the water-stop flap of this utility model can meet the needs of pipes of various sizes, expand the application range of the device, and the installation only requires positioning and bolt tightening operations, without the need for complicated on-site welding or pouring, thus improving installation efficiency and convenience.

[0014] Thirdly, in this utility model, the water-stop flap consists of a fixed plate, a water-stop plate, and rollers. The fixed plate has an adjustment groove, and bolts pass through the adjustment groove to fix the fixed plate to the rubber water-stop ring. The water-stop plate is connected to the fixed plate through the rollers, and the water-stop plate is equipped with guide pulleys for guiding the pipeline. This structure solves the problems of existing flap fixing methods being unable to adapt to different pipe sizes and the complex installation process. The position and angle of the water-stop flap can be flexibly adjusted according to pipe specifications and construction requirements to ensure a tight fit between the water-stop device and the pipe, enhancing the sealing effect. The design of the guide pulleys facilitates the smooth jacking of the pipe, reduces construction resistance, improves the efficiency and stability of pipe jacking construction, reduces frictional wear between the pipe and the water-stop device, and extends the service life of the device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the first and second water-stopping structures.

[0018] Figure 3 This is a side view of the present invention;

[0019] Figure 4 A schematic diagram of a water-stop flap;

[0020] In the diagram: 1. Inner lining wall, 2. Rubber waterstop ring, 3. Waterstop flap, 4. Adjustment groove, 5. Bolt, 6. Circular fixing steel plate, 7. Roller, 8. Guide pulley, 9. Circular fixing plate, 10. Pipe, 11. Fixing plate, 12. Waterstop plate. Detailed Implementation

[0021] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," or "the," etc., used in this utility model patent application specification and claims do not express a quantity limitation, but rather indicate the presence of at least one; terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0023] To more clearly describe the specific structural composition of the double-layer water-stopping device used for the slurry-balanced pipe jacking opening, in conjunction with the attached... Figure 1 - Appendix Figure 4 This embodiment is described as follows:

[0024] This embodiment provides a double-layer water-stopping device for the opening of a slurry-water balance pipe jacking tunnel. The device will be described in detail below with reference to its specific structure and implementation method.

[0025] In this embodiment, the double-layer water-stopping device mainly includes an annular fixing plate 9 fixed to the outside of the opening in the inner lining wall 1, a first water-stopping structure and a second water-stopping structure with identical structures, and an annular fixing steel plate 6. The annular fixing plate 9 serves as the basic support structure, and has several evenly spaced holes. The first water-stopping structure is fixed to the outside of the annular fixing plate 9 through these holes. The second water-stopping structure is then superimposed and fixed to the first water-stopping structure by the annular fixing steel plate 6. The annular fixing plate 9, the first water-stopping structure, the annular fixing steel plate 6, and the second water-stopping structure are sequentially superimposed and fixed to the outside of the opening in the inner lining wall 1, and their centers are located on the same straight line, ensuring the stability of the device.

[0026] In this embodiment, the first and second water-stop structures are identical, both consisting of a rubber water-stop ring 2 and several water-stop flaps 3. The water-stop flaps 3 are evenly arranged along the inner circumference of the rubber water-stop ring 2. The first and second water-stop structures are rotated and staggered, with the water-stop flaps 3 of the second water-stop structure located at the gaps between adjacent water-stop flaps 3 on the first water-stop structure. This double-layered, staggered water-stop structure significantly improves sealing performance and reliability. During construction, even if one layer of the water-stop structure is damaged, the other layer can still function, effectively preventing sealing failure caused by high pressure from mud and water, groundwater seepage pressure, and vibration impact from pipe jacking construction, thus ensuring the safety and continuity of the construction process.

[0027] In this embodiment, the water-stop flap 3 consists of a fixed plate 11, a water-stop plate 12, and a roller 7. The fixed plate 11 has an adjustment groove 4 for adjusting the position of the water-stop flap 3, and bolts 5 pass through the adjustment groove 4 to fix the fixed plate 11 to the rubber water-stop ring 2. The water-stop plate 12 is connected to the fixed plate 11 via the roller 7. Furthermore, the water-stop plate 12 is also equipped with a guide pulley 8 for guiding the pipe 10. This structural design allows the position and angle of the water-stop flap 3 to be flexibly adjusted according to the specifications of the pipe 10 and construction requirements, ensuring a tight fit between the water-stop device and the pipe 10 and enhancing the sealing effect. Simultaneously, the design of the guide pulley 8 facilitates the smooth jacking of the pipe 10, reduces construction resistance, improves the efficiency and stability of pipe jacking construction, reduces frictional wear between the pipe 10 and the water-stop device, and extends the service life of the device.

[0028] The annular fixed steel plate 6 is an I-shaped annular steel plate with fixed through holes on both its upper and lower surfaces for connecting the first and second water-stop structures. The annular fixed steel plate 6 serves as an intermediate rigid support layer, connecting the first and second water-stop devices and enhancing overall pressure resistance. Under low pressure, the first layer of sealing rubber water-stop ring 2 dominates, while the annular fixed steel plate 6 provides auxiliary support and disperses the pressure, achieving a flexible seal through its elastic deformation to accommodate minor vibrations or displacements in the pipeline 10. Under higher pressure, the second layer of water-stop flaps 3 unfold and press against the gaps between the annular fixed steel plate 6 and adjacent water-stop flaps 3 in the first water-stop structure. The two water-stop structures and the annular fixed steel plate 6 share the pressure, forming a dynamic balance.

[0029] The inner diameter of the annular fixing plate 9 is larger than the outer diameter of the jacking pipe 10. This design creates an annular gap, which facilitates the subsequent installation of the rubber water-stop ring 2 and the adjustment of the seal.

[0030] Specific installation steps in this embodiment:

[0031] Step 1: Fix the annular fixing plate 9 to the outside of the opening in the inner lining wall 1.

[0032] Step 2: Fix the rubber water-stop ring 2 of the first water-stop structure to the outside of the annular fixing plate 9 through the hole, and fix the water-stop flap 3 to the rubber water-stop ring 2 with bolts 5.

[0033] Step 3: Stack annular fixing steel plate 6 on the first water-stop structure, and fix the second water-stop structure on the annular fixing steel plate 6 through the fixing through hole. By adjusting the bolts 5 and adjusting grooves 4 on the water-stop flap 3, it can accommodate pipes 10 of different sizes, ensuring that the water-stop device fits tightly with the pipe 10.

[0034] It should be noted that although the present invention has been described through the above embodiments, there may be other various embodiments of the present invention. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A double-layer water-stopping device for the opening of a slurry-balanced pipe jacking tunnel, characterized in that, The system includes an annular fixing plate (9) fixed to the outside of the opening in the inner lining wall (1), which has several holes. The first water-stopping structure is fixed to the outside of the annular fixing plate (9) through the holes. The second water-stopping structure is superimposed and fixed to the first water-stopping structure by an annular fixing steel plate (6). The annular fixing plate (9), the first water-stopping structure, the annular fixing steel plate (6) and the second water-stopping structure are superimposed and fixed to the outside of the opening in the inner lining wall (1) in sequence, and their centers are located on the same straight line. The first water-stop structure is the same as the second water-stop structure, both consisting of a rubber water-stop ring (2) and several water-stop flaps (3). The water-stop flaps (3) are evenly arranged along the inner circumference of the rubber water-stop ring (2). The water-stop flaps (3) of the second water-stop structure are staggered with the water-stop flaps (3) of the first water-stop structure. The water-stop flap (3) is composed of a fixed plate (11), a water-stop plate (12) and a roller (7). The fixed plate (11) is provided with an adjustment groove (4) for adjusting the position of the water-stop flap (3). The bolt (5) passes through the adjustment groove (4) to fix the fixed plate (11) on the rubber water-stop ring (2). The water-stop plate (12) is connected to the fixed plate (11) through the roller (7). The annular fixed steel plate (6) is an annular steel plate with an I-shaped cross-section, and its upper and lower surfaces are provided with fixed through holes for connecting the first water-stop structure and the second water-stop structure.

2. The double sealing device for the slurry balance pipe hole according to claim 1, wherein, The waterstop plate (12) is also provided with guide pulleys (8) for guiding the pipe (10).

3. The double sealing device for slurry balance pipe jacking hole according to claim 1, characterized in that, The inner diameter of the annular fixing plate (9) is larger than the outer diameter of the pipe (10).

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