A diffusion-preventing device for fault fissure grouting

Abstract

The application provides a diffusion-preventing device for fault fissure grouting, which comprises a first pipe body, a second pipe body, a prop open assembly and a fixing assembly. The prop open assembly is used for filling the gap between the second pipe body and the grouting hole, and the fixing assembly is used for fixing the first pipe body, the second pipe body and the prop open assembly in the grouting hole. The fixing assembly comprises a plurality of pins. The second pipe body is provided with a plurality of through holes which are uniformly distributed on the periphery of the second pipe body. Each through hole is provided with a pin which can slide radially along the through hole to the second pipe body. The diffusion-preventing device for fault fissure grouting is provided with the fixing assembly. The plurality of pins are radially extended and anchored on the inner wall of the grouting hole. The position of the fixing device as a whole is fixed. When the grouting liquid is pumped out by the grouting pump, the device as a whole is prevented from shaking due to the pressure of the grouting liquid, the grouting liquid is prevented from overflowing and diffusing from the grouting hole, the grouting process is ensured to be stable, and the grouting efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of coal mine fault grouting reinforcement, and in particular relates to an anti-diffusion device for fault fracture grouting. Background Technology

[0002] As the depth of underground coal mining continues to increase, the development of fault fracture zones and fissured rock masses becomes more complex, exacerbating the risks of disasters such as water hazards and surrounding rock instability. Grouting reinforcement has become a core technical means to manage fault fissures, seal water diversion channels, and ensure the safety of roadways.

[0003] During the grouting process, grouting holes need to be pre-drilled at the locations where grouting is required. Traditional grouting devices lack reliable internal fixing structures and are prone to shaking and displacement under the impact of high-pressure grout, leading to an expansion of the gap between the pipe and the hole wall, insufficient sealing performance, and easy overflow and backflow of grout along the annular gap of the hole wall, resulting in grout diffusion. This not only causes a large waste of grout but also results in incomplete filling of the target cracks, greatly reducing the reinforcement and water-blocking effects. Conventional devices are cumbersome to disassemble and assemble, have low reusability, and are difficult to adapt to the rapid construction needs under complex geological conditions. Therefore, a stable, anchorable, and sealable anti-diffusion grouting device is needed to solve the above problems. Summary of the Invention

[0004] In view of this, the present invention aims to provide an anti-diffusion device for grouting in fault fractures, so as to solve the problems of easy shaking of the device and easy overflow and diffusion of grout during the grouting process, which leads to unstable grouting and low efficiency.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A grouting anti-propagation device for fault fracture grouting includes a first pipe body, a second pipe body, a spreading component, and a fixing component. An external grouting pump is connected to one end of the first pipe body, and the other end of the first pipe body is provided with a grout outlet. The second pipe body is fixedly sleeved around the periphery of the first pipe body. The fixing component is provided inside the second pipe body, and the spreading component is provided between the fixing component and the grout outlet. The spreading component is installed on the periphery of the second pipe body and is used to fill the gap between the second pipe body and the grouting hole. The fixing component is used to fix the first pipe body, the second pipe body, and the spreading component in the grouting hole. The fixing component includes multiple pins, and multiple through holes are evenly distributed around the periphery of the second pipe body. A pin is slidably disposed in each through hole, and the pin can slide radially along the through hole towards the second pipe body.

[0007] Furthermore, the fixing component also includes a sleeve and a pushing part. The sleeve is slidably disposed inside the second tube, and multiple pushing parts are evenly distributed around the periphery of the sleeve. Each pushing part is arranged in a one-to-one correspondence with a pin, and each pushing part can drive a corresponding pin to slide radially.

[0008] Furthermore, the pushing part includes a first wedge block and a second wedge block. Multiple first wedge blocks are evenly distributed around the periphery of the sleeve. The upper surface of the first wedge block is a first inclined sliding surface. The first inclined sliding surface is slidably connected to a second inclined sliding surface. The second inclined sliding surface is the lower surface of the second wedge block. The lower end of each second wedge block is fixedly connected to the upper end of a pin.

[0009] Furthermore, the first inclined sliding surface is provided with a groove, and the second inclined sliding surface is provided with an inclined platform, the periphery of which is slidably connected to the groove.

[0010] Furthermore, the expansion assembly includes an airbag and an air tube. The airbag is installed around the second tube and is connected to an external inflation device via the air tube, which is installed around the second tube.

[0011] Furthermore, one end of the sleeve is circumferentially distributed with multiple support plates, the ends of which are fixedly connected to the inner ring of the mounting ring. The air tube is located between any two adjacent support plates, and the periphery of each support plate is slidably connected to a square hole. Multiple square holes are opened on the periphery of the second tube body.

[0012] Furthermore, a circular groove is provided on one side of the mounting ring, and a sliding table is rotatably connected in the circular groove. The sliding table is located on one side of the nut, and the inner ring of the nut is threadedly connected to the outer periphery of the second pipe body.

[0013] Furthermore, a retaining ring is fixedly fitted around the outer periphery of the second pipe body. The retaining ring is located between the mounting ring and the pin, and one side of the retaining ring is used to abut against the outer plane of the grouting hole.

[0014] Compared with the prior art, the anti-propagation device for grouting in fault fractures described in this invention has the following beneficial effects:

[0015] (1) The anti-diffusion device for grouting of fault fractures described in this invention is provided with a fixing component. Multiple pins extend radially and are anchored to the inner wall of the grouting hole to fix the position of the entire device. This prevents the device from shaking due to the pressure of the grout being pumped out by the grouting pump during grouting, and prevents the grout from overflowing and diffusing from the grouting hole. This ensures the stability of the grouting process and improves the grouting efficiency.

[0016] (2) The anti-diffusion device for grouting of fault fissures described in this invention, by setting a first wedge block with an inclined groove and a second wedge block with an inclined platform, can drive the pin to extend and retract in both directions when the sleeve moves axially. The pin can extend for anchoring or retract for disassembly, simplifying operation and improving the efficiency of device installation and disassembly.

[0017] (3) The anti-diffusion device for grouting of fault fractures described in this invention is equipped with an air bladder. The air bladder can expand and fill the gap between the second pipe and the inside of the grouting hole, preventing the grout from backflowing and spraying out from the grouting hole during the grouting process and ensuring the smooth progress of the grouting process. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is an overall schematic diagram of an anti-diffusion device for grouting in fault fractures according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the through hole according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the fixing component and the spreading component according to an embodiment of the present invention;

[0022] Figure 4 This is an exploded schematic diagram of the propulsion unit according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the circular groove described in an embodiment of the present invention;

[0024] Figure 6 This is a schematic cross-sectional view of the sleeve according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-First tube body; 11-Slurry outlet; 2-Second tube body; 21-Through hole; 22-Clamping ring; 23-Square hole; 3-Spreading assembly; 31-Airbag; 32-Air tube; 4-Fixing assembly; 41-Pin; 42-Sleeve; 421-Support plate; 43-Nut; 431-Slide table; 44-Pushing part; 441-First wedge block; 4411-First inclined sliding surface; 4412-Inclined groove; 442-Second wedge block; 4421-Second inclined sliding surface; 4422-Inclined table; 45-Mounting ring; 451-Circular groove. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figures 1-6 As shown, a grouting anti-propagation device for fault fracture grouting includes a first pipe body 1, a second pipe body 2, a spreading component 3, and a fixing component 4. An external grouting pump is connected to one end of the first pipe body 1, and the other end of the first pipe body 1 is provided with a grout outlet 11. The second pipe body 2 is fixedly sleeved around the periphery of the first pipe body 1. The fixing component 4 is installed inside the second pipe body 2, and the spreading component 3 is installed between the fixing component 4 and the grout outlet 11. The spreading component 3 is installed around the periphery of the second pipe body 2 and is used to fill the gap between the second pipe body 2 and the grouting hole. Figure 1 As shown, a retaining ring 22 is fixedly fitted around the outer periphery of the second pipe body 2. The retaining ring 22 is located between the mounting ring 45 and the pin 41. One side of the retaining ring 22 is used to abut against the outer plane of the grouting hole. The fixing assembly 4 is used to fix the first pipe body 1, the second pipe body 2, and the spreading assembly 3 inside the grouting hole; as shown Figure 1 As shown, the fixing component 4 includes a plurality of pins 41, such as Figure 2As shown, multiple through holes 21 are evenly distributed around the periphery of the second pipe body 2, and a pin 41 is slidably installed in each through hole 21. The pin 41 can slide radially along the through hole 21 towards the second pipe body 2. First, the entire anti-diffusion device for fault fracture grouting is placed into the pre-drilled grouting hole. One side of the retaining ring 22 abuts against the outer wall plane of the grouting hole. One end of the first pipe body 1 is connected to an external grouting pump. The grouting pump is existing technology, and the model of the grouting pump is GZB-90EX. The second pipe body 2 is also located in the grouting hole. First, the pin 41 is extended simultaneously. The end of the pin 41 penetrates and is fixed to the inner wall of the grouting hole to prevent grouting. During the expansion of the grouting or expanding component 3, it sways within the grouting hole. Subsequently, the expanding component 3 expands to fill the gap between the grouting hole and the outer periphery of the second pipe body 2. At this time, the grouting pump is started to inject the grouting fluid through the first pipe body 1 and discharge it through the grout outlet 11, sending it into the grouting hole. The grouting fluid enters the hole to fill the fault fissure, completing the grouting operation. A fixing component 4 is set up, which extends radially through multiple pins 41 and is anchored to the inner wall of the grouting hole to fix the position of the entire device. This prevents the entire device from shaking due to the pressure of the grouting fluid pumped out by the grouting pump during grouting, and prevents the grouting fluid from overflowing and spreading from the grouting hole, ensuring the stability of the grouting process and improving grouting efficiency.

[0032] like Figures 2-4 and Figure 6 As shown, the fixing component 4 also includes a sleeve 42 and a pushing part 44. The sleeve 42 is slidably disposed inside the second tube body 2. Multiple pushing parts 44 are evenly distributed around the periphery of the sleeve 42. Each pushing part 44 is correspondingly disposed with a pin 41. Each pushing part 44 can drive a corresponding pin 41 to slide radially. The pushing part 44 includes a first wedge block 441 and a second wedge block 442. Multiple first wedge blocks 441 are evenly distributed around the periphery of the sleeve 42. The upper end surface of the first wedge block 441 is a first inclined sliding surface 4411. The first inclined sliding surface 4411 is slidably connected to a second inclined sliding surface 4421. The second inclined sliding surface 4421 is the lower end surface of the second wedge block 442. Each second wedge block 442 is fixedly connected to a pin 442 at its upper end. At the lower end of the pin 41, when the sleeve 42 slides axially within the second tube 2, it drives the first wedge block 441 on its periphery to move synchronously. The first inclined sliding surface 4411 of the first wedge block 441 slides along the second inclined sliding surface 4421 of the second wedge block 442. Through the guiding effect of the two inclined sliding surfaces, the axial movement of the sleeve 42 is converted into the radial movement of the second wedge block 442, which in turn drives the corresponding pin 41 to extend radially along the through hole 21, realizing the synchronous anchoring and elongation action of the pin 41. Through the cooperation of the sleeve 42, the first wedge block 441 and the second wedge block 442, the axial thrust can be converted into radial ejection force, which can drive multiple pins 41 to slide radially synchronously, ensuring that the extension action of the pins 41 is consistent.

[0033] like Figure 4As shown, the first inclined sliding surface 4411 is provided with a groove 4412, and the second inclined sliding surface 4421 is provided with a ramp 4422. The ramp 4422 is slidably connected to the groove 4412. When the sleeve 42 moves axially, driving the first wedge block 441 to move, the groove 4412 on the first inclined sliding surface 4411 and the ramp 4422 on the second inclined sliding surface 4421 cooperate and slide. After the pin 41 has been extended, the groove 4412 and the ramp 4422 can pull the pin 41 back, realizing the retraction of the pin 41. The extension of the sleeve 42 can cause the pin 41 to be pulled back and retracted by the axial movement of the sleeve 42. When the sleeve 42 moves towards the grouting hole, the pin 41 retracts, and when the sleeve 42 moves away from the grouting hole, the pin 41 extends. By setting a first wedge block 441 with a groove 4412 and a second wedge block 442 with a ramp 4422, the sleeve 42 can drive the pin 41 to extend and retract in both directions when it moves axially. The pin 41 can be extended for anchoring or retracted for disassembly, which simplifies the operation and improves the efficiency of device installation and disassembly.

[0034] like Figure 1 and Figure 3 As shown, the expansion component 3 includes an airbag 31 and an air tube 32. The airbag 31 is installed around the second tube 2. The airbag 31 is connected to an external inflation device through the air tube 32. The air tube 32 is installed around the second tube 2. After the entire device is inserted into the grouting hole and fixed in position by multiple pins 41, the external inflation device inflates the airbag 31 through the air tube 32. The external inflation device is existing technology, and the model of the external inflation device is Kewig KWG-MP-1. The airbag 31 expands and fills the gap between the second tube 2 and the inside of the grouting hole, preventing the grout from backflowing and spreading from the grouting hole during the grouting process, thus ensuring the smooth progress of the grouting process.

[0035] like Figure 3 , Figure 5 and Figure 6As shown, multiple support plates 421 are evenly distributed around one end of the sleeve 42. The ends of the multiple support plates 421 are all fixedly connected to the inner ring of the mounting ring 45. The air tube 32 is located between any two adjacent support plates 421. The outer periphery of each support plate 421 is slidably connected to a square hole 23. Multiple square holes 23 are opened on the outer periphery of the second tube body 2. Adjacent support plates 421 provide clearance for the air tube 32. A circular groove 451 is provided on one side of the mounting ring 45. A slide 431 is rotatably connected in the circular groove 451. The slide 431 is set on one side of the nut 43. The inner ring of the nut 43 is threadedly connected to the second tube body 2. Around the periphery of the tube body 2, rotate the nut 43. The nut 43 moves axially around the periphery of the second tube body 2 through the thread, causing the slide table 431 to rotate in the circular groove 451 and push the mounting ring 45. The mounting ring 45 drives the sleeve 42 to slide axially through the support plate 421. The support plate 421 slides in the second tube body 2, and the space between adjacent support plates 421 provides clearance for the air tube 32 to avoid squeezing or interfering with the air tube 32 during movement. Through the cooperation of the nut 43, the slide table 431 and the circular groove 451, the rotational movement of the nut 43 is converted into the axial movement of the sleeve 42, which facilitates operation.

[0036] The working process of an anti-propagation device for fault fracture grouting:

[0037] First, insert the entire device into the pre-drilled grouting hole, so that the second pipe body 2 is located in the grouting hole, and one side of the retaining ring 22 abuts against the outer plane of the grouting hole.

[0038] Then, the nut 43 is rotated outward. The nut 43 moves axially around the second pipe body 2 through the thread, which drives the slide table 431 to rotate in the circular groove 451 and pushes the mounting ring 45. The mounting ring 45 drives the sleeve 42 to slide axially in the second pipe body 2 through the support plate 421. When the sleeve 42 moves, it drives the first wedge block 441 to move synchronously. The first inclined sliding surface 4411 slides along the second inclined sliding surface 4421. The inclined groove 4412 and the inclined table 4422 cooperate with each other to guide and convert the axial movement of the sleeve 42 into the radial movement of the second wedge block 442. This drives the pin 41 to extend radially along the through hole 21 and anchor into the inner wall of the grouting hole, thus completing the fixation of the device.

[0039] An external inflation device inflates the airbag 31 through the air pipe 32. The airbag 31 expands and fits tightly against the inner wall of the grouting hole, filling the gap between the second pipe 2 and the grouting hole.

[0040] Start the grouting pump, and the grouting fluid is injected into the grouting hole from the grout outlet 11 through the first pipe 1 to fill the fault fissure;

[0041] After grouting is completed, rotate the nut 43 in the opposite direction to drive the sleeve 42 to move back. The inclined groove 4412 and the inclined platform 4422 cooperate to pull the pin 41 back. The air bag 31 deflates and contracts, and the device can be taken out to complete the grouting operation.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for preventing the spread of grout in fault fractures, characterized in that: The system includes a first pipe body (1), a second pipe body (2), a spreading component (3), and a fixing component (4). An external grouting pump is connected to one end of the first pipe body (1), and the other end of the first pipe body (1) is provided with a grout outlet (11). The second pipe body (2) is fixedly sleeved around the first pipe body (1). The fixing component (4) is provided inside the second pipe body (2), and the spreading component (3) is provided between the fixing component (4) and the grout outlet (11). The spreading component (3) is installed outside the second pipe body (2). The expansion component (3) is used to fill the gap between the second pipe body (2) and the grouting hole, and the fixing component (4) is used to fix the first pipe body (1), the second pipe body (2) and the expansion component (3) in the grouting hole; the fixing component (4) includes multiple pins (41), and multiple through holes (21) are evenly distributed around the second pipe body (2). A pin (41) is slidably disposed in each through hole (21), and the pin (41) can slide radially along the through hole (21) toward the second pipe body (2).

2. The anti-propagation device for fault fracture grouting according to claim 1, characterized in that: The fixing component (4) also includes a sleeve (42) and a pusher (44). The sleeve (42) is slidably arranged inside the second tube (2). Multiple pushers (44) are evenly distributed around the sleeve (42). The pushers (44) and pins (41) are arranged in a one-to-one correspondence. Each pusher (44) can drive a corresponding pin (41) to slide radially.

3. The anti-propagation device for fault fracture grouting according to claim 2, characterized in that: The pushing part (44) includes a first wedge block (441) and a second wedge block (442). Multiple first wedge blocks (441) are evenly distributed around the sleeve (42). The upper end surface of the first wedge block (441) is a first inclined sliding surface (4411). The first inclined sliding surface (4411) is slidably connected to the second inclined sliding surface (4421). The second inclined sliding surface (4421) is the lower end surface of the second wedge block (442). The upper end of each second wedge block (442) is fixedly connected to the lower end of a pin (41).

4. The anti-propagation device for fault fracture grouting according to claim 1, characterized in that: The first inclined sliding surface (4411) is provided with a groove (4412), and the second inclined sliding surface (4421) is provided with a ramp (4422), the ramp (4422) being slidably connected to the outside of the groove (4412).

5. The anti-propagation device for fault fracture grouting according to claim 1, characterized in that: The expansion component (3) includes an airbag (31) and an air tube (32). The airbag (31) is installed on the periphery of the second tube (2). The airbag (31) is connected to an external inflation device through the air tube (32). The air tube (32) is installed on the periphery of the second tube (2).

6. The anti-propagation device for fault fracture grouting according to claim 5, characterized in that: Multiple support plates (421) are evenly distributed around one end of the sleeve (42). The ends of the multiple support plates (421) are fixedly connected to the inner ring of the mounting ring (45). The air pipe (32) is located between any two adjacent support plates (421). The periphery of each support plate (421) is slidably connected to a square hole (23). Multiple square holes (23) are opened on the periphery of the second tube body (2).

7. The anti-propagation device for fault fracture grouting according to claim 6, characterized in that: A circular groove (451) is provided on one side of the mounting ring (45), and a slide (431) is rotatably connected in the circular groove (451). The slide (431) is located on one side of the nut (43), and the inner ring of the nut (43) is threaded to the outer periphery of the second tube body (2).

8. The anti-propagation device for fault fracture grouting according to claim 1, characterized in that: The second pipe body (2) is fixedly fitted with a retaining ring (22). The retaining ring (22) is located between the mounting ring (45) and the pin (41). One side of the retaining ring (22) is used to abut against the outer plane of the grouting hole.

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