Pipe roof grouting leakage-proof device

Abstract

The application relates to a pipe roof grouting leakage-proof device. The pipe roof grouting leakage-proof device comprises a leakage-proof device body, an elastic sealing ring and an intermediate fixing device. The bottom of the elastic sealing ring is provided with a circular groove matched with a pipe roof steel pipe, the middle part is provided with a through hole, the elastic sealing ring is arranged at the end of the pipe roof steel pipe, the end of the pipe roof steel pipe is located in the circular groove of the elastic sealing ring, the outer ring of the elastic sealing ring is sleeved with the leakage-proof device body, the leakage-proof device body is formed by connecting two detachable half circular rings, the intermediate fixing device is arranged and connected on the leakage-proof device body along the radial direction of the leakage-proof device body, the intermediate fixing device is provided with two, the two intermediate fixing devices are respectively located at the upper part and the lower part of the elastic sealing ring, and the intermediate fixing device is provided with a grouting hole coaxial with the middle part through hole of the elastic sealing ring. The problems of poor adaptability and unstable sealing effect of the existing technology can be solved, and the reliability and efficiency of the pipe roof grouting construction are improved.

Description

Technical Field

[0001] This application relates to the field of underground engineering construction technology, and in particular to a grouting leak-proof device for pipe roof grouting. Background Technology

[0002] In pipe roof grouting construction, grout leakage has become a key bottleneck affecting construction quality and efficiency. Existing grout leakage prevention devices, such as mechanical grout stop plugs, steel perforated pipes with grout stop rings, and sleeve valve pipes, can function in certain scenarios, but they have significant technical drawbacks: Traditional mechanical grout stop plugs are mostly fixed structures, making it difficult to adjust for irregular deformations of the borehole wall after installation. According to engineering statistics, the grout leakage rate due to installation errors in fractured rock formations is as high as 35%, and a single installation takes about 40 minutes, which is 2.5 times longer than that of detachable devices. Grout stop ring structures are difficult to effectively compress the soil to form a seal in hard rock formations. When the grouting pressure exceeds 5 MPa, grout leakage caused by grout stop ring failure accounts for 62% of the problems, especially when the rock surface undulation difference exceeds 10 mm, the risk of seal failure increases significantly (refer to statistics from the "Technical Specification for Tunnel Grouting Construction"). While the segmented grouting process using sleeve valves can achieve segmented control, its complexity leads to a 40% reduction in construction efficiency and a more than 30% increase in material costs (compared to traditional grouting processes). Furthermore, it requires specialized equipment, limiting its adoption in small and medium-sized projects. In addition, existing devices generally suffer from poor adaptability to pipe diameters; when the diameter of the steel pipe in the pipe roof fluctuates by more than 3mm, the sealing reliability of traditional grouting devices decreases by more than 50%, severely restricting construction efficiency.

[0003] Therefore, there is an urgent need for a simple, self-adjustable, and reliably sealed anti-leakage grouting device to solve engineering problems such as insufficient grouting pressure (the grouting pressure attenuation rate of conventional devices reaches 20%-30%) and grout waste (the leakage amount can account for up to 15% of the total grouting volume) caused by grout leakage in complex strata. Utility Model Content

[0004] To address or partially address the problems existing in related technologies, this application provides a grouting leak-proof device for pipe roof grouting, which can solve the problems of poor adaptability and unstable sealing effect of existing grouting devices, thereby improving the reliability and efficiency of pipe roof grouting construction.

[0005] This application provides a grouting leak-proof device for pipe roof grouting, including a grouting leak-proof device body 1, an elastic sealing ring 2, and an intermediate fixing device 15. The elastic sealing ring 2 has a circular groove at its bottom that mates with the pipe roof steel pipe 6, and a through hole in its middle. The elastic sealing ring 2 is located at the end of the pipe roof steel pipe 6, with the end of the pipe roof steel pipe 6 situated within the circular groove of the elastic sealing ring 2. The outer ring of the elastic sealing ring 2 is fitted with the grouting leak-proof device body 1, which is formed by connecting two detachable semi-circular rings 11. The intermediate fixing device 15 is arranged radially along the grouting leak-proof device body 1 and connected to it. There are two intermediate fixing devices 15, located at the upper and lower parts of the elastic sealing ring 2, respectively. The intermediate fixing device 15 has a grouting hole 7 coaxial with the through hole in the middle of the elastic sealing ring 2.

[0006] Optionally, in some embodiments, one end of the detachable semicircular ring 11 is provided with a fixed hinge 13, one end of the two detachable semicircular rings 11 is hinged by the fixed hinge 13, and the other end is provided with a bolt connecting lug 10, and a first adjusting bolt 31 is connected between the two bolt connecting lugs 10.

[0007] Optionally, in some embodiments, a sealing gasket 12 is provided between the intermediate fixing device 15 and the elastic sealing ring 2.

[0008] Optionally, in some embodiments, the intermediate fixing device 15 includes a hinge bolt 5 and a centering device connecting hinge 4. The hinge bolt 5 passes through the fixing hinge 13, the centering device connecting hinge 4, and the bolt connecting lug 10 for rotatable connection, and its end is threadedly connected to a second adjusting bolt 32. The centering device connecting hinge 4 is composed of two connecting hinge blocks with symmetrical semi-circular grooves on opposite surfaces connected by a third adjusting bolt 33. The two semi-circular grooves form a grouting hole 7. The centering device connecting hinges 4 of the two intermediate fixing devices 15 are connected by a fourth adjusting bolt 34.

[0009] Optionally, in some embodiments, a coupling rubber gasket 14 is provided between the opposing surfaces of the two connecting hinge blocks on the same side of the elastic sealing ring 2.

[0010] Optionally, in some embodiments, the diameter of the through hole in the middle of the elastic sealing ring 2 is not less than the diameter of the grouting hole 7, and the diameter of the through hole in the middle of the elastic sealing ring 2 is less than the length of the smaller side of the connecting hinge 4 of the centering device.

[0011] Optionally, in some embodiments, the centering device connecting hinge 4 is provided with a ventilation hole 8 and an inspection hole 9, and the elastic sealing ring 2 is provided with an orifice corresponding to the ventilation hole 8, and the orifice diameter is larger than the ventilation hole 8 diameter.

[0012] The technical solution provided in this application may include the following beneficial effects:

[0013] This application optimizes the quality of the grout-stopping ring. The device has a simple structure, is easy to install, and does not require complicated construction processes. It can significantly shorten construction time, reduce construction costs, improve the one-time success rate of pipe roof grouting, ensure the quality of grouting construction, improve construction efficiency, and accelerate construction progress. It has high promotion and application value, reduces grout leakage in pipe roof grouting, and reduces the labor intensity of construction personnel and construction costs.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0015] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments of this application taken in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of this application.

[0016] Figure 1 This is a schematic diagram of the structure of the pipe roof grouting anti-leakage device shown in Embodiment 1 of this application;

[0017] Figure 2 This is a schematic diagram of the end face structure of the pipe roof grouting anti-leakage device shown in Embodiment 2 of this application;

[0018] Figure 3 This is a side view of the grouting and leakage prevention device for pipe roof shown in Embodiment 2 of this application;

[0019] Figure 4 This is a schematic diagram of the installation structure of the pipe roof grouting anti-leakage device shown in the embodiments of this application.

[0020] Figure label:

[0021] 1- Leakage prevention device body, 2- Elastic sealing ring, 31- First adjusting bolt, 32- Second adjusting bolt, 33- Third adjusting bolt, 34- Fourth adjusting bolt, 4- Centering device connecting hinge, 5- Hinge bolt, 6- Pipe shed steel pipe, 7- Grouting hole, 8- Ventilation hole, 9- Inspection hole, 10- Bolt connecting ear, 11- Detachable semi-circular ring, 12- Sealing gasket, 13- Fixed hinge, 14- Coupling rubber gasket. Detailed Implementation

[0022] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] To address the aforementioned issues, this application provides a grouting leak-proof device for pipe roof grouting, which solves the problems of poor adaptability and unstable sealing effect of existing grouting devices, thereby improving the reliability and efficiency of pipe roof grouting construction.

[0027] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] See Figure 1The aforementioned grouting anti-leakage device for pipe roof includes an anti-leakage device body 1, an elastic sealing ring 2, and an intermediate fixing device 15. The bottom of the elastic sealing ring 2 is provided with a circular groove that mates with the steel pipe 6 of the pipe roof, and a through hole is opened in the middle. The elastic sealing ring 2 is set at the end of the steel pipe 6 of the pipe roof, and the end of the steel pipe 6 of the pipe roof is located in the circular groove of the elastic sealing ring 2. The outer ring of the elastic sealing ring 2 is fitted with the anti-leakage device body 1. The anti-leakage device body 1 is formed by connecting two detachable semi-circular rings 11. The intermediate fixing device 15 is arranged radially along the anti-leakage device body 1 and connected to the anti-leakage device body 1. There are two intermediate fixing devices 15, which are respectively located at the upper and lower parts of the elastic sealing ring 2. The intermediate fixing device 15 is provided with a grouting hole 7 that is coaxial with the through hole in the middle of the elastic sealing ring 2.

[0030] The elastic sealing ring 2 is made of high-pressure resistant rubber material. According to GB / T 1801-2020 standard, it adopts H7 / h6 fit tolerance. Combined with the elastic modulus of high-pressure resistant rubber (20MPa), it is calculated that a 1.5mm interference fit can withstand a grouting pressure of 10MPa. Its inner diameter of the circular groove is 1.5mm smaller than the diameter of the pipe roof steel pipe to form an interference fit and enhance the sealing effect. After testing, when the grouting pressure reaches 10MPa, the radial deformation of the elastic sealing ring 2 is ≤0.8mm (i.e., the total deformation is ≤2.3mm), which can still maintain the interference fit and prevent grout leakage.

[0031] The elastic sealing ring 2 is set at the end of the pipe roof steel pipe 6, and the end of the pipe roof steel pipe 6 is located in the circular groove of the elastic sealing ring 2. The elastic sealing ring 2 seals the pipe roof steel pipe 6. The body 1 of the anti-leakage device tightens the elastic sealing ring 2 on the pipe roof steel pipe 6 to form the basic positioning of the elastic sealing ring 2. Then, the intermediate fixing device 15 is used to axially position the elastic sealing ring 2. The intermediate fixing device 15 located at the lower part of the elastic sealing ring 2 passes through the pipe roof steel pipe 6. The two intermediate fixing devices 15 are connected together, so that the intermediate fixing device 15 located at the upper part of the elastic sealing ring 2 presses the elastic sealing ring 2. Then, grouting is performed through the grouting hole 7.

[0032] This invention overcomes the problem of grout leakage in conventional pipe roof grouting, ensuring construction quality and efficiency. Normally, grouting pipe roofs requires significant labor, time, and increases costs to ensure quality and minimize leakage. Using this device greatly improves construction speed, quality, and grout material usage, thereby shortening construction time and accelerating progress. Ideally, during pipe roof grouting, the grout should be strictly confined within the grouting area, with no obvious leakage at the orifice or other locations, or only slight, controllable leakage. However, traditional anti-leakage devices are cumbersome to disassemble and install, have poor adaptability, and poor sealing. This can lead to situations where the orifice stop plug is not compacted or the stop ring (such as shotcrete sealing) is not strong enough and can be ruptured by the high-pressure grout. During grouting, the grout may experience insufficient grouting pressure, high grout backflow velocity, and rapid outflow along the gap between the stop plug and the orifice, resulting in leakage, difficulty in grouting, and slow speed, ultimately leading to poor grouting quality. In contrast, this new anti-leakage device features a hinged structure, allowing for quick disassembly and installation. It is adaptable to pipe roof steel pipes of different diameters and is particularly easy to adjust in complex geological formations, solving the problem of difficulty in adjusting traditional fixed stop devices after installation.

[0033] Furthermore, the elastic sealing ring 2 forms an interference fit with the pipe roof steel pipe 6. Combined with the pressure generated by the tightening of the semi-circular ring 11 by the adjusting bolts, and the adjustment of the coaxiality between the semi-circular ring 11 and the pipe roof steel pipe 6 by the hinge structure, the interference seal is uniform, forming a triple sealing guarantee. This effectively prevents the grout from flowing back from the orifice, and significantly improves the sealing reliability. The flexibility of the elastic sealing ring 2 allows it to adapt to irregular orifice walls and maintain a good sealing effect in various working conditions such as loose strata and fractured rock strata. This overcomes the defect of traditional grout-stopping rings having poor sealing effect in hard rock strata, ensuring the grouting construction quality and construction efficiency.

[0034] Example 2

[0035] See Figure 2-4 Based on embodiment 1, one end of the detachable semi-circular ring 11 is provided with a fixed hinge 13, one end of the two detachable semi-circular rings 11 is hinged by the fixed hinge 13, and the other end is provided with a bolt connecting lug 10. A first adjusting bolt 31 is connected between the two bolt connecting lugs 10.

[0036] The first adjusting bolt 31 is a high-strength bolt, and its length can be adaptively adjusted according to the diameter of the pipe roof steel pipe 6. When the diameter of the pipe roof steel pipe 6 is D, the first adjusting bolt 31 can adapt to the pipe diameter change of D±5mm (e.g., when D=100mm, the adjustable range is 95mm~105mm), ensuring that the elastic sealing ring 2 always maintains an interference of 1.5mm, so that the two detachable semi-circular rings 11 fit tightly together.

[0037] A sealing gasket 12 is provided between the intermediate fixing device 15 and the elastic sealing ring 2; this ensures that the elastic sealing ring 2 is subjected to uniform force after the intermediate fixing device 15 is pressed against it.

[0038] The intermediate fixing device 15 includes a hinge bolt 5 and a centering device connecting hinge 4. The hinge bolt 5 passes through the fixing hinge 13, the centering device connecting hinge 4, and the bolt connecting lug 10 for rotatable connection, and its end is threaded with a second adjusting bolt 32. The centering device connecting hinge 4 is composed of two connecting hinge blocks with symmetrical semi-circular grooves on opposite surfaces connected by a third adjusting bolt 33. The two semi-circular grooves form a grouting hole 7. The centering device connecting hinges 4 of the two intermediate fixing devices 15 are connected by a fourth adjusting bolt 34. The diameter of the through hole in the middle of the elastic sealing ring 2 is not less than the diameter of the grouting hole 7, and the diameter of the through hole in the middle of the elastic sealing ring 2 is less than the length of the smaller side of the centering device connecting hinge 4.

[0039] The fourth adjusting bolt 34 is used to press the centering device connecting hinge 4, which is located on the upper part of the elastic sealing ring 2, into the elastic sealing ring 2. This positions the elastic sealing ring 2 and prevents it from detaching from the pipe roof steel pipe 6 under force. The diameter of the through hole in the middle of the elastic sealing ring 2 is smaller than the length of the smaller side of the centering device connecting hinge 4 to prevent grout leakage. The diameter of the through hole in the middle of the elastic sealing ring 2 is not smaller than the diameter of the grouting hole 7 to prevent the through hole from shrinking due to compression deformation of the elastic sealing ring 2, which would affect grouting. The through hole in the middle of the elastic sealing ring 2 should not be too large. Ideally, the through hole in the middle of the compressed elastic sealing ring 2 should be slightly smaller than the diameter of the grouting hole 7 so that an interference fit can be formed after the grouting pipe is inserted.

[0040] A coupling rubber gasket 14 is provided between the opposing surfaces of the two connecting hinge blocks on the same side of the elastic sealing ring 2; the interference fit between the two connecting hinge blocks can be achieved by connecting the third adjusting bolt 33, which further enhances the sealing effect.

[0041] The centering device has a ventilation hole 8 and an inspection hole 9 on the connecting hinge 4. The elastic sealing ring 2 has an orifice corresponding to the ventilation hole 8, and the orifice diameter is larger than the diameter of the ventilation hole 8. The inspection hole 9 is used to check for leakage. During inspection, the ventilation hole 8 can be sealed. The ventilation hole 8 is used for ventilation and exhaust. The orifice diameter on the elastic sealing ring 2 is slightly larger than the diameter of the ventilation hole 8 to prevent the orifice from being offset from the ventilation hole 8 due to compression of the elastic sealing ring 2.

[0042] The working process of this application:

[0043] During installation, first, the elastic sealing ring 2 is placed on the pipe roof steel pipe 6. Then, the anti-leakage device body 1 is opened and placed on the elastic sealing ring 2, so that the elastic sealing ring 2 fits tightly against the surface of the pipe roof steel pipe 6. Then, the distance between the two semi-circular rings 11 and the elastic sealing ring 2 and the pipe roof steel pipe 6 is adjusted by the first adjusting bolt 31 until they fit completely.

[0044] Then, the hinge bolt 5 passes through the fixed hinge 13, and the centering device connecting hinge 4 is rotatably connected to the bolt connecting lug 10. Tightening the second adjusting bolt 32 with a wrench causes the elastic sealing ring 2 to elastically deform, further enhancing the sealing effect. The elastic sealing ring 2, the sealing gasket 12, and the centering device connecting hinge 4 are then rotatably connected by adjusting the fourth adjusting bolt 34 with a wrench to achieve a seal. A coupling rubber gasket 14 is provided at the connection point of the centering device connecting hinge 4, and an interference seal is achieved by rotatably connecting it by adjusting the third adjusting bolt 33 with a wrench.

[0045] After completing the above operations, inject clean water to 0.5MPa, check for leakage through inspection hole 9, and then tighten the bolts to seal. During grouting, the grout is injected into the formation through grouting hole 7. The interference fit between the elastic sealing ring 2 and the pipe roof steel pipe 6 forms a radial foundation seal; the axial pressure generated by the tightening of the first adjusting bolt 31 on the semi-circular ring 11 forms an axial compression seal through the sealing gasket 12; the centering device connecting hinge 4 forms a central radial seal by adjusting the fourth adjusting bolt 34 to axially compress and couple the rubber gasket 14; the radial foundation seal, axial compression seal, and central radial seal formed by the elastic sealing ring 2, the centering device connecting hinge 4, and the adjusting bolt form a triple seal, effectively preventing grout from leaking out of the hole.

[0046] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0047] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0048] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A grouting leak-proof device for pipe roofs, characterized in that: The grouting anti-leakage device for pipe roof includes an anti-leakage device body (1), an elastic sealing ring (2), and an intermediate fixing device (15). The bottom of the elastic sealing ring (2) is provided with a circular groove that matches the steel pipe (6) of the pipe roof, and a through hole is opened in the middle. The elastic sealing ring (2) is set at the end of the steel pipe (6) of the pipe roof, and the end of the steel pipe (6) of the pipe roof is located in the circular groove of the elastic sealing ring (2). The outer ring of the elastic sealing ring (2) is fitted with the anti-leakage device body (1). The anti-leakage device body (1) is formed by connecting two detachable semi-circular rings (11). The intermediate fixing device (15) is arranged radially along the anti-leakage device body (1) and connected to the anti-leakage device body (1). There are two intermediate fixing devices (15). The two intermediate fixing devices (15) are located at the upper and lower parts of the elastic sealing ring (2), respectively. The intermediate fixing device (15) is provided with a grouting hole (7) that is coaxial with the through hole in the middle of the elastic sealing ring (2).

2. The grouting leak-proof device for pipe roof as described in claim 1, characterized in that: One end of the detachable semi-circular ring (11) is provided with a fixed hinge (13). One end of the two detachable semi-circular rings (11) is hinged by the fixed hinge (13), and the other end is provided with a bolt connecting ear (10). A first adjusting bolt (31) is connected between the two bolt connecting ears (10).

3. The grouting leak-proof device for pipe roofs according to claim 2, characterized in that: A sealing gasket (12) is provided between the intermediate fixing device (15) and the elastic sealing ring (2).

4. The grouting leak-proof device for pipe roofs according to claim 2 or 3, characterized in that: The intermediate fixing device (15) includes a hinge bolt (5) and a centering device connecting hinge (4). The hinge bolt (5) passes through the fixing hinge (13), the centering device connecting hinge (4), and the bolt connecting lug (10) for rotational connection, and its end is threaded with a second adjusting bolt (32). The centering device connecting hinge (4) is composed of two connecting hinge blocks with symmetrical semi-circular grooves on opposite surfaces connected by a third adjusting bolt (33). The two semi-circular grooves form a grouting hole (7). The centering device connecting hinges (4) of the two intermediate fixing devices (15) are connected by a fourth adjusting bolt (34).

5. The grouting leak-proof device for pipe roofs according to claim 4, characterized in that: A coupling rubber gasket (14) is provided between the opposite surfaces of the two connecting hinge blocks on the same side of the elastic sealing ring (2).

6. The grouting leak-proof device for pipe roof as described in claim 5, characterized in that: The diameter of the through hole in the middle of the elastic sealing ring (2) is not less than the diameter of the grouting hole (7), and the diameter of the through hole in the middle of the elastic sealing ring (2) is less than the length of the smaller side of the connecting hinge (4) of the centering device.

7. The grouting leak-proof device for pipe roof as described in claim 6, characterized in that: The centering device has a ventilation hole (8) and an inspection hole (9) on the connecting hinge (4). The elastic sealing ring (2) has an opening corresponding to the ventilation hole (8), and the diameter of the opening is larger than the diameter of the ventilation hole (8).

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