A grouting device and a grouting system

Abstract

The application provides a grouting device and a grouting system, and relates to the technical field of grouting. The grouting device comprises a sleeve valve pipe assembly and a grouting pipe assembly. The sleeve valve pipe assembly comprises a pipe fitting, and grouting holes are distributed on the circumferential side of the side wall of the pipe fitting. The grouting pipe assembly comprises a grouting piece, the grouting piece is rotatably arranged in the pipe fitting, the grouting piece has a grouting flow guide channel, the grouting outlet of the grouting flow guide channel faces the side wall of the pipe fitting, and the rotation of the grouting piece is configured to enable the grouting outlet to selectively communicate with the grouting holes at different circumferential positions of the sleeve valve pipe. The application can be used for targeted grouting of rock mass fissures, and can improve the reliability, safety and economy of the grouting project.

Description

Technical Field

[0001] This application relates to the field of grouting technology, and in particular to a grouting device and grouting system. Background Technology

[0002] Sleeve valve grouting technology generally suffers from insufficient control over the grouting location and direction, making it difficult to achieve directional, quantitative, and uniform diffusion of the grout. This often results in grout loss along the weakest points with the least resistance, wasting materials and affecting grouting quality, failing to meet the requirements for refined grouting in fractured rock masses. Therefore, there is an urgent need to develop a new type of grouting device capable of precisely controlling the grouting point and direction. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a grouting device and grouting system that can perform targeted grouting on rock mass fissures, thereby improving the reliability, safety and economy of grouting projects.

[0004] This application provides the following technical solution: In a first aspect, embodiments of this application provide a grouting device, the grouting device comprising: A sleeve valve tube assembly, the sleeve valve tube assembly including a tube fitting, wherein grouting holes are distributed on the circumferential side of the sidewall of the tube fitting; The grouting pipe assembly includes a grouting component rotatably disposed within the pipe. The grouting component has a grouting guide channel, and the grouting outlet of the grouting guide channel faces the side wall of the pipe. The rotatable configuration of the grouting component enables the grouting outlet to selectively communicate with grouting holes at different circumferential positions of the sleeve valve pipe.

[0005] In some embodiments of the first aspect, the grouting pipe assembly further includes a seal disposed on the grouting member, the seal being distributed at least around the grouting outlet for sealing the gap between the grouting outlet and the inner wall of the pipe.

[0006] In some embodiments of the first aspect, the grouting component includes a grouting core tube that is slidably inserted within the component, the grouting outlet is provided on the side wall of the grouting core tube, and the grouting guide channel includes the inner hole of the grouting core tube.

[0007] In some embodiments of the first aspect, the sealing element includes an elastic sealing sleeve fitted and connected to the grouting core tube. The elastic sealing sleeve has a clearance opening that is correspondingly connected to the grouting outlet, and the outer peripheral wall of the elastic sealing sleeve is fitted to the inner peripheral wall of the pipe fitting to seal the annular gap between the grouting core tube and the pipe fitting.

[0008] In some embodiments of the first aspect, the outer peripheral wall of the elastic sealing sleeve is provided with at least one groove, the at least one groove being spaced apart along the axial direction of the grouting core tube and extending circumferentially along the grouting core tube.

[0009] In some embodiments of the first aspect, the elastic sealing sleeve includes a first elastic sealing sleeve, a second elastic sealing sleeve, and a third elastic sealing sleeve, the first elastic sealing sleeve, the second elastic sealing sleeve, and the third elastic sealing sleeve are arranged sequentially along the axial direction of the grouting core tube, the second elastic sealing sleeve has two ends in the circumferential direction, and the gap between the two ends of the second elastic sealing sleeve defines the clearance opening.

[0010] In some embodiments of the first aspect, the grouting pipe assembly further includes a drive member, the grouting member and the drive member are connected, and the drive member is capable of driving the grouting member to rotate; And / or, the grouting pipe assembly further includes an orientation sensor disposed on the grouting component, the orientation sensor being capable of detecting the orientation of the grouting outlet.

[0011] In some embodiments of the first aspect, the grouting pipe assembly further includes a conveying component, the conveying component including a grouting pipe and a rotary joint, one end of the grouting pipe being connected to the grouting inlet of the grouting guide channel via the rotary joint; wherein the axis of the rotary joint and the rotation axis of the grouting component are collinear.

[0012] In some embodiments of the first aspect, the fitting is composed of multiple sleeve valve tubes connected in series.

[0013] Secondly, embodiments of this application also provide a grouting system, the grouting system including the grouting device as described in any of the above embodiments.

[0014] The embodiments of this application have the following advantages: This application provides a grouting device that achieves precise control over the grouting point and direction through the coordinated operation of a sleeve valve assembly and a rotatable grouting pipe assembly. The sleeve valve assembly is fixed in a rock borehole, with multiple grouting holes circumferentially distributed on its sidewall, serving as outlets for grout injection into the rock mass. The grouting pipe assembly is inserted into the sleeve valve, and its grouting component can rotate along the pipe's axis. The grouting component has a grouting guide channel inside, with the grouting outlet of the guide channel oriented to the sidewall of the pipe. By rotating the grouting component, the operator can adjust the circumferential orientation of the grouting outlet to align it with a specific grouting hole on the sleeve valve, thereby achieving directional grouting. When the grouting outlet is connected to at least one grouting hole, grout is ejected from that hole under pressure through the grouting guide channel, precisely injecting into the target fracture area. By continuously rotating the grouting component, grouting can be performed sequentially on grouting holes in different directions, achieving uniform diffusion and quantitative distribution of grout within the rock mass.

[0015] Therefore, by controlling the grout outlet direction by rotating the grouting component, precise grouting can be performed on specific fissures in the rock mass, avoiding blind grout diffusion and significantly improving the accuracy of grouting location and direction. Grouting can be performed sequentially on different circumferential grouting holes, ensuring uniform filling of rock fissures and addressing the problem of grout concentration and loss at weak points in traditional grouting, thus improving the integrity and stability of the grout body. This reduces grout waste, avoids ineffective grouting, lowers material consumption and engineering costs, and shortens the grouting period. Precise grouting enhances the integrity and impermeability of the rock mass structure, making it suitable for complex geological conditions such as fractured rock masses and fractured zones, and improving the safety standards and long-term reliability of grouting projects.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a grouting device provided in an embodiment of this application is shown from one perspective; Figure 2 A schematic diagram of the structure of a grouting device provided in an embodiment of this application is shown from another perspective; Figure 3 It shows Figure 2 A magnified schematic diagram of the structure at point A in the diagram; Figure 4 This illustration shows a schematic structural view of a grouting pipe assembly of a grouting device according to an embodiment of this application.

[0019] Explanation of key component symbols: 100-Sleeve valve assembly; 110-Sleeve valve; 111-Grouting hole; 200-Grouting pipe assembly; 210-Grouting pipe; 220-Driver; 230-First elastic sealing sleeve; 240-Second elastic sealing sleeve; 241-Allowing opening; 250-Third elastic sealing sleeve; 260-Grouting component; 261-Grouting outlet; 270-Position sensing component. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] In this application, 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.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. 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] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] In related technologies, sleeve valve grouting technology generally suffers from insufficient control over the grouting position and direction, making it difficult to achieve directional, quantitative, and uniform diffusion of the grout. This often results in grout loss along the weakest points with the least resistance, wasting materials and affecting grouting quality, thus failing to meet the needs of refined grouting in fractured rock masses. Therefore, there is an urgent need to develop a new type of grouting device capable of precisely controlling the grouting point and direction.

[0026] As shown in Figure 1, Figure 2 , Figure 3 and Figure 4 As shown, to solve the above-mentioned technical problems, this application provides a grouting device, which includes a sleeve valve tube assembly 100 and a grouting pipe assembly 200. The sleeve valve tube assembly 100 includes a pipe fitting, and grouting holes 111 are distributed around the sidewall of the pipe fitting. The grouting pipe assembly 200 includes a grouting component 260, which is rotatably disposed inside the pipe fitting. The grouting component 260 has a grouting guide channel, and the grouting outlet 261 of the grouting guide channel faces the sidewall of the pipe fitting. The rotation configuration of the grouting component 260 allows the grouting outlet 261 to selectively communicate with the grouting holes 111 at different circumferential positions of the sleeve valve tube 110.

[0027] In these embodiments, a grouting device for refined grouting of fractured rock masses is provided, aiming to solve problems such as insufficient control over the grouting position and direction, uneven grout diffusion, and easy loss along weak paths in existing sleeve valve pipe 110 grouting technology. This device, through the cooperation of the rotatable grouting component 260 and the multi-directional grouting holes 111 on the sleeve valve pipe 110, achieves active selection and precise control of the grouting direction and position, thereby improving the targeting, uniformity, and material utilization rate of the grouting.

[0028] The sleeve valve assembly 100 includes a hollow fitting made of high-strength PVC or stainless steel, suitable for long-term embedment in boreholes. The outer diameter and length of the fitting are designed according to the grouting depth.

[0029] Multiple sets of grouting holes 111 are evenly distributed circumferentially on the sidewall of the pipe fitting, with each set of grouting holes 111 spaced apart along the axial direction of the pipe fitting. Each set of grouting holes 111 is arranged in a ring around the circumference of the pipe fitting, for example, divided into four directions: upper, lower, left, and right, for a total of four grouting holes 111, with a hole diameter of 6-8 mm. Each grouting hole 111 is externally covered with a one-way rubber sleeve valve, the function of which is to open under grouting pressure to allow grout to flow out. After grouting is completed, it automatically closes under external soil and rock pressure to prevent backflow or impurities from entering.

[0030] For example, each group of grouting holes 111 is distributed at least three different angular positions (such as 0°, 120°, 240°) in the circumferential direction to achieve full circumferential grouting coverage and ensure that directional grouting can be performed in any direction.

[0031] The grouting pipe assembly 200 includes a grouting element 260, which is a slender rod-shaped structure rotatably disposed inside the pipe, with an outer diameter slightly smaller than the inner diameter of the pipe, to ensure free rotation and maintain a seal.

[0032] The grouting component 260 has an axially extending grouting guide channel inside, which is used to transport cement grout or chemical grout. The end of the grouting guide channel forms a grouting outlet 261, which faces the sidewall of the component. In this embodiment, the grouting outlet 261 is achieved through an inclined or bent lateral nozzle, the spray direction of which forms a certain angle (e.g., 45°) with the axis of the grouting component 260, so as to more effectively align with the grouting hole 111 on the sidewall of the sleeve valve pipe 110.

[0033] The rotation of the grouting component 260 is controlled by a ground-driven device (such as a rotary motor or manual turntable) via a drive shaft. By rotating the grouting component 260, the spatial orientation of the grouting outlet 261 can be adjusted to align it with a grouting hole 111 at a specific location on the circumference of the pipe. When the grouting outlet 261 is aligned with one or more grouting holes 111 and pressure is applied, the grout pushes the rubber sleeve valve at that location to open, achieving directional grouting in that direction.

[0034] In this embodiment, for every 90° rotation of the grouting component 260, its grouting outlet 261 can sequentially align with the grouting holes 111 in four different directions around the pipe. For example: When the grouting component 260 is rotated to 0°, the grouting outlet 261 is aligned with the "east side" grouting hole 111, and the grout is injected into the eastward fracture of the rock mass; When rotated to 90°, align with the "south" grouting hole 111 to achieve southward grouting; Similarly, sequential or selective grouting in multiple directions within a 360° range can be achieved.

[0035] By pre-setting the rotation angle or combining it with directional devices such as gyroscopes, the grouting direction can be accurately located, enabling precise filling of the known fracture orientation.

[0036] Of course, in other embodiments, the distribution of grouting holes 111 is not limited to four directions, but can also be six-directional, eight-directional, or even continuously spirally distributed to achieve more precise directional control. The rotation of the grouting component 260 can be driven by electric, hydraulic, or magnetic coupling methods, and can be integrated with an angle encoder to achieve digital control. In addition, it can be combined with ground-penetrating radar or microseismic monitoring systems to provide real-time feedback on grout diffusion, forming a closed-loop intelligent grouting system.

[0037] For example, a sealing ring is provided between the outer wall of the grouting component 260 and the inner wall of the pipe to prevent grout leakage in non-target directions. At the same time, a guide head is provided at the front end of the grouting component 260 to facilitate its smooth insertion and positioning inside the pipe.

[0038] When using this device for grouting, the following steps are included: The sleeve valve tube assembly 100 is pre-embedded in the borehole, and the hole is sealed with a grout stop plug.

[0039] Insert the grouting component 260 of the grouting pipe assembly 200 into the pipe and lower it to the target grouting section.

[0040] The angle of the grouting component 260 is adjusted by the ground rotation device so that the grouting outlet 261 is aligned with the grouting hole 111 in the target direction.

[0041] Start the grouting pump, and the grout is sprayed out from the grouting outlet 261 through the grouting guide channel, opening the corresponding grouting hole 111 and injecting into the rock mass fissure.

[0042] After grouting in this direction is completed, rotate the grouting component 260 degrees to the next direction and repeat the grouting process.

[0043] After grouting is completed in all directions, the grouting component 260 is lifted to the next grouting section, and the above process is repeated.

[0044] Therefore, the grouting device of this application, through the cooperation of the rotatable grouting component 260 and the circumferentially distributed grouting holes 111, achieves active control of the grouting direction, overcoming the defects of "passive diffusion and path dependence" in traditional sleeve valve pipe grouting. Clearly, this device can improve grout utilization, effectively reduce grout waste, and significantly enhance the uniformity and reliability of grouting reinforcement, making it particularly suitable for high-precision grouting scenarios such as complex fractured rock masses and underground engineering seepage prevention and reinforcement.

[0045] In some embodiments, the grouting pipe assembly 200 further includes a sealing element disposed on the grouting component 260, the sealing element being distributed at least around the grouting outlet 261 for sealing the gap between the grouting outlet 261 and the inner wall of the pipe component.

[0046] In these embodiments, the grouting pipe assembly 200 also includes a seal disposed on the outer periphery of the grouting component 260, specifically distributed on both axial sides or the circumferential region of the grouting outlet 261, for sealing the annular gap between the grouting outlet 261 and the inner wall of the pipe, preventing the grout from flowing out or back in a non-target direction.

[0047] For example, the seal is an elastic rubber sealing ring, such as an O-ring or a lip seal, made of oil-resistant and wear-resistant fluororubber or nitrile rubber. The seal is embedded in the annular groove on the outer wall of the grouting component 260. When the grouting component 260 is inserted into the pipe, the seal forms an interference fit with the inner wall of the pipe, achieving dynamic sealing.

[0048] Optionally, at least two seals are symmetrically arranged at the upstream and downstream positions of the grouting outlet 261 to form a structural layout of "double seal + intermediate grouting outlet 261". This can effectively isolate the grouting channel from other areas of the inner cavity of the sleeve valve pipe 110, ensuring that the grout can only be discharged through the currently aligned grouting hole 111, avoiding the grout from flowing along the inner wall of the pipe to other misaligned grouting holes 111, causing simultaneous grouting at multiple points or grout waste.

[0049] For example, when the grouting outlet 261 rotates to align with the "east side" grouting hole 111, the upstream and downstream seals isolate the grouting section from other axial areas, causing the grout pressure to concentrate on the rubber sleeve valve of the target grouting hole 111, prompting it to open, while the sleeve valves in other directions remain closed due to the lack of pressure, thereby achieving single-point, unidirectional, and quantitative grouting.

[0050] Furthermore, the number of seals can be adjusted according to the grouting pressure level. In high-pressure grouting scenarios (e.g., ≥2MPa), three or more seals can be installed to form a multi-stage sealing structure to improve sealing reliability.

[0051] In some embodiments, the grouting component 260 includes a grouting core tube that slides through the pipe, and the side wall of the grouting core tube is provided with a grouting outlet 261. The grouting guide channel includes the inner hole of the grouting core tube.

[0052] In these embodiments, the grouting component 260 is specifically configured as a grouting core tube, which is a slender hollow tubular structure. The entire core tube can be slidably inserted into the tube of the sleeve valve assembly 100 and can move up and down axially to achieve step-by-step grouting of grouting sections at different heights.

[0053] For example, the grouting core tube is made of stainless steel or high-strength engineering plastic, with an outer diameter slightly smaller than the inner diameter of the fitting. The gap is typically controlled between 0.5 and 2 mm to ensure smooth sliding and effective sealing by the sealing element. The grouting core tube has an axially extending inner hole at its center, which serves as the main channel for grout delivery, forming the grouting guide channel. Grout is introduced from the ground grouting pump via a high-pressure hose to the upper interface of the grouting core tube and then delivered downwards along the inner hole to the target location.

[0054] A grouting outlet 261 is provided on the side wall of the grouting core tube. The grouting outlet 261 is one or more lateral openings, such as elliptical or circular holes with a diameter of 6 to 10 mm. Its orientation is perpendicular to the axis of the grouting core tube or at a certain angle (such as 30° to 60°) so that the grout injection direction is aligned with the grouting hole 111 on the side wall of the tube.

[0055] By rotating the grouting core tube, the spatial orientation of the grouting outlet 261 can be changed. By sliding the grouting core tube up and down, it can be aligned with the grouting holes 111 at different axial positions. Therefore, this embodiment achieves two-dimensional spatial control: axial (sliding) positioning of the grouting height and circumferential (rotation) selection of the grouting direction.

[0056] For example, in actual operation, the grouting core pipe is connected to an external drive rod or wire rope to achieve remote control from the ground. The specific workflow is as follows: Insert the grouting core tube into the fitting and slide it to the first grouting section (e.g., at a depth of 10m). Rotate the grouting core tube so that the grouting outlet 261 is aligned with the grouting hole 111 in the target direction (e.g., north). Start grouting; the grout sprays out from the grouting outlet 261 through the inner hole, opening the corresponding rubber sleeve valve and injecting it into the rock mass. After completing grouting in this direction, keep the axial position unchanged and rotate the core tube to the next direction (e.g., east) and repeat the grouting. After grouting in all directions is completed, slide the grouting core tube upwards to the next grouting section (e.g., at a depth of 9.5m) and repeat the above process. This allows one set of grouting core tubes to complete multi-segment, multi-directional grouting operations for the entire sleeve valve pipe 110 without frequent disassembly and assembly, significantly improving construction efficiency.

[0057] To enhance the structural strength and wear resistance of the grouting core tube, its surface can be chrome-plated or sprayed with tungsten carbide. Simultaneously, a locally thickened area or embedded ceramic nozzle can be provided around the grouting outlet 261 to prevent wear caused by high-speed grout scouring.

[0058] Furthermore, the top of the grouting core tube is equipped with a rotation mark or angle scale ring, which can be used in conjunction with the ground pointer to help operators intuitively judge the outlet orientation; it can also be integrated with an electronic gyroscope module to achieve digital angle feedback and precise orientation.

[0059] In some embodiments, the sealing element includes an elastic sealing sleeve that is fitted and connected to the grouting core tube. The elastic sealing sleeve has a clearance opening 241 that is correspondingly connected to the grouting outlet 261. The outer peripheral wall of the elastic sealing sleeve fits against the inner peripheral wall of the tube to seal the annular gap between the grouting core tube and the tube.

[0060] In these embodiments, the seal is further specified as an elastic sealing sleeve, which is a flexible sealing component used to effectively seal the annular gap between the grouting core tube and the fitting to prevent grout leakage or cross-flow.

[0061] The elastic sealing sleeve is made of a wear-resistant and highly elastic material, such as fluororubber, silicone rubber, or other polymeric elastic materials suitable for high-pressure grouting environments. The elastic sealing sleeve is fixedly installed on the outer circumference of the grouting core tube by a sleeve connection, typically located on both axial sides of the grouting outlet 261, to provide comprehensive sealing protection.

[0062] In order not to affect the grouting operation, the elastic sealing sleeve is provided with a relief opening 241. The relief opening 241 is precisely aligned and connected with the grouting outlet 261, so that when the grouting core tube is rotated to a specific position, the grout can be smoothly sprayed out from the grouting outlet 261 through the relief opening 241 without being obstructed by the sealing sleeve.

[0063] Specifically, the shape and size of the clearance opening 241 must match the grouting outlet 261 to ensure smooth and unobstructed grout flow. In some embodiments, the clearance opening 241 can be a simple opening.

[0064] The outer peripheral wall of the elastic sealing sleeve is precision machined to ensure good contact with the inner peripheral wall of the pipe fitting. Even with slight displacement due to pressure changes during grouting, it can maintain a stable sealing effect.

[0065] In addition, the elastic sealing sleeve can also be equipped with a self-tightening device or pre-loading mechanism, such as a spring ring or pneumatic component, to maintain a constant radial pressure, ensuring that the sealing sleeve always tightly wraps around the grouting core tube and fits tightly against the inner wall of the pipe, so that it will not lose its sealing ability due to material aging even after long-term use.

[0066] The elastic sealing sleeve not only prevents grout leakage but also buffers mechanical friction between the grouting core tube and fittings to a certain extent, extending equipment lifespan. Under standard operating conditions, the grouting system employing this sealing solution can control the grout leakage rate to an extremely low level, far below the industry average, significantly improving the safety and efficiency of grouting operations.

[0067] In some embodiments, the outer peripheral wall of the elastic sealing sleeve is provided with at least one groove, the at least one groove is provided at intervals along the axial direction of the grouting core tube, and the groove extends along the circumferential direction of the grouting core tube.

[0068] In these embodiments, at least one groove is provided on the outer peripheral wall of the elastic sealing sleeve. The groove extends continuously along the circumference of the grouting core tube and is spaced apart in the axial direction to form a multi-ring or spiral groove structure.

[0069] The grooves are annular recesses machined on the outer surface of the elastic sealing sleeve, with a depth of 0.5–2 mm and a width of 1–3 mm. They are formed directly during the manufacturing process using molding or precision turning. The number of grooves can be adjusted according to the sealing pressure rating and service life requirements, for example, two, three, or more grooves can be set, and they can be evenly or non-uniformly distributed along the axial direction of the grouting core tube.

[0070] The presence of grooves gives the outer peripheral wall of the elastic sealing sleeve better radial deformation capability. When the sealing sleeve contacts the inner wall of the pipe fitting, the grooves can compress and deform, absorbing dimensional tolerances and out-of-roundness errors, improving the fit of the sealing surface, and are especially suitable for the inner cavity of the sleeve valve pipe 110 with slight bending or deformation.

[0071] The groove divides the originally continuous large-area contact surface into multiple independent sealing zones, which significantly reduces the sliding friction area between the elastic sealing sleeve and the inner wall of the pipe, thereby reducing the operating torque of the grouting core pipe during rotation and sliding, avoiding jamming, and improving operational flexibility.

[0072] During long-term use, rock powder or solidified slurry particles can enter the inner cavity of the pipe fitting. The grooves can act as "chip storage tanks" to temporarily accommodate these tiny impurities, preventing them from accumulating on the sealing surface and causing scratches or seal failure, thus extending the service life of the seals.

[0073] Under high-pressure grouting conditions, the grout generates seepage pressure through tiny gaps. The groove structure acts as a pressure buffer, creating a multi-stage throttling effect that gradually reduces the leakage pressure gradient, thereby improving the overall sealing reliability.

[0074] In some embodiments, the grooves are concentric annular grooves, arranged at equal intervals along the axial direction on both the upstream and downstream sides of the grouting outlet 261 to form a symmetrical sealing structure. For example, two grooves are provided upstream of the grouting outlet 261 and one groove is provided downstream, forming an asymmetrical pressure balance layout to adapt to unidirectional grouting pressure loads.

[0075] In other variant embodiments, the groove can also be designed as a spiral, which retains circumferential continuity to maintain the integrity of the sealing path, and has axial flow guidance function, which is beneficial to the distribution of lubricating media (such as water or grease).

[0076] In addition, the cross-sectional shape of the groove can be U-shaped, V-shaped or rectangular, and the design can be optimized according to the deformation characteristics of the elastic material to balance sealing and durability.

[0077] In some embodiments, the elastic sealing sleeve includes a first elastic sealing sleeve 230, a second elastic sealing sleeve 240, and a third elastic sealing sleeve 250. The first elastic sealing sleeve 230, the second elastic sealing sleeve 240, and the third elastic sealing sleeve 250 are arranged sequentially along the axial direction of the grouting core tube. The second elastic sealing sleeve 240 has two ends in the circumferential direction, and the gap between the two ends of the second elastic sealing sleeve 240 defines an avoidance opening 241.

[0078] In these embodiments, the resilient sealing sleeve is further refined into three independent but cooperative sub-components: a first resilient sealing sleeve 230, a second resilient sealing sleeve 240, and a third resilient sealing sleeve 250. These three resilient sealing sleeves are arranged sequentially along the axial direction of the grouting core tube, working together to provide a more reliable sealing effect.

[0079] The first elastic sealing sleeve 230 and the third elastic sealing sleeve 250 are located above and below the grouting outlet 261, respectively. Their main function is to provide a radial seal for the foundation, preventing grout from leaking from the annular gap between the grouting core tube and the fitting. These two sealing sleeves typically use the same design parameters to ensure consistency and symmetry of the upper and lower seals.

[0080] The second elastic sealing sleeve 240 is arranged near the grouting outlet 261, having two ends in its circumferential direction and a specific gap between the two ends, which defines the clearance opening 241 to allow the grout to be discharged smoothly through the grouting outlet 261 without obstruction.

[0081] The clearance opening 241 formed between the two ends of the second elastic sealing sleeve 240 not only facilitates precise alignment with the grouting outlet 261, reducing processing and assembly difficulties, but also ensures that the grout can flow out smoothly and be accurately injected into the target area. The width and shape of the clearance opening 241 can be adjusted according to actual grouting requirements.

[0082] Furthermore, the aforementioned structural design reduces assembly and processing difficulty.

[0083] In some embodiments, the grouting pipe assembly 200 further includes a drive member 220, which is connected to the grouting member 260 and can drive the grouting member 260 to rotate.

[0084] In these embodiments, the grouting pipe assembly 200 further includes a drive member 220 connected to the grouting member 260 (specifically the grouting core tube) for actively driving the grouting core tube to rotate about its axis, thereby achieving precise alignment between the grouting outlet 261 and the grouting holes 111 at different circumferential positions of the sleeve valve tube 110.

[0085] The drive unit 220 is installed on the ground or at the upper interface of the grouting device, and is fixedly connected to the top of the grouting core tube through a transmission mechanism. The drive unit 220 can output a controllable rotational torque, driving the grouting core tube to rotate continuously or in steps inside the tube. The rotation angle can be precisely controlled according to the preset grouting direction.

[0086] In different embodiments, the drive element 220 may take the following forms: Electric drive: Using a servo motor or stepper motor as the power source, in conjunction with a reducer, it can achieve high-precision angle control. The motor is programmed through a PLC or host computer control system, supporting automatic rotation to a set direction (such as 0° north, 90° east, etc.), suitable for intelligent grouting systems.

[0087] Hydraulic drive: Employs a hydraulic motor, suitable for construction sites with high torque and harsh working conditions. The hydraulic system is supplied with oil by a ground hydraulic station, driving the motor to rotate through high-pressure oil pipes, and has the advantages of high power density and strong anti-interference ability.

[0088] Manual drive: In small or temporary projects, a handwheel or turntable structure can also be used. The grouting core tube is rotated by manually rotating the transmission rod, which is low in cost and intuitive to operate.

[0089] For example, the drive unit 220 and the grouting core tube can be connected in the following way: Direct threaded connection: The top of the grouting core tube is provided with an external thread, which is locked in place with the internal thread of the output shaft of the drive component 220, making disassembly and assembly convenient.

[0090] Keyway + flange connection: Torque is transmitted via a flat key or spline and fixed with flange bolts, suitable for high torque transmission.

[0091] Magnetic coupling connection: Permanent magnets are used to achieve non-contact torque transmission, avoiding mechanical wear, and at the same time achieving dynamic sealing of the fluid channel.

[0092] In some embodiments, the drive unit 220 also integrates an angle feedback device (such as a rotary encoder or gyroscope) to monitor the rotation angle of the grouting core tube in real time and feed the signal back to the control system to form a closed-loop control, ensuring accurate directional positioning.

[0093] In some embodiments, the grouting pipe assembly 200 further includes an orientation sensor 270 disposed on the grouting component 260, the orientation sensor 270 being capable of detecting the orientation of the grouting outlet 261.

[0094] In these embodiments, the grouting pipe assembly 200 further includes an orientation sensor 270 disposed on the grouting component 260 (specifically the grouting core tube) for real-time detection of the spatial orientation (i.e., azimuth angle) of the grouting outlet 261, thereby achieving accurate identification and feedback control of the grouting direction.

[0095] The orientation sensor 270 is installed at the bottom of the grouting core tube, or it can be integrated inside the grouting core tube and lowered to the target depth underground. Its function is to sense the current direction of the grouting outlet 261 and transmit this information to the ground display or control system via electrical signals, digital signals, or wireless means for operator confirmation or automatic adjustment.

[0096] In different embodiments, the orientation sensing element 270 can be implemented using a variety of sensing technologies: Electronic compass (magnetometer) module: Determines the azimuth of the grouting outlet 261 relative to geographic true north by detecting the direction of the Earth's magnetic field. Suitable for environments without strong magnetic interference, with an accuracy within ±2°.

[0097] Gyroscope sensor: Employing a microelectromechanical system (MEMS) gyroscope, the rotation angle change of the grouting core tube is measured. Combined with the initial calibration position, the absolute orientation of the current grouting outlet 261 can be calculated cumulatively. This is particularly suitable for complex drilling environments with metal casings or magnetic field interference.

[0098] The orientation sensing element 270 is installed at the bottom of the grouting core tube. In deep hole applications, it can also be encapsulated in a pressure-resistant and waterproof probe and lowered into the bottom of the hole along with the grouting core tube.

[0099] Signal transmission methods include: Wired transmission: Data is transmitted to ground instruments via shielded cables laid along the grouting core pipe; Wireless transmission: Low-frequency electromagnetic wave or acoustic wave communication technology is used to achieve real-time data transmission without interrupting the grouting operation.

[0100] In some embodiments, the grouting pipe assembly 200 further includes a conveying component, which includes a grouting pipe 210 and a rotary joint. One end of the grouting pipe 210 is connected to the grouting inlet of the grouting guide channel through the rotary joint. The axis of the rotary joint and the rotation axis of the grouting component 260 are collinear.

[0101] In these embodiments, the grouting pipe assembly 200 further includes a conveying member for stably and continuously conveying the grout output from the ground grouting pump to the grouting guide channel of the grouting component 260 (i.e., the grouting core pipe), while accommodating the rotational movement of the grouting core pipe to avoid pipe entanglement or connection breakage due to rotation.

[0102] Grouting pipe 210 has good pressure resistance (usually able to withstand 2-10MPa), one end is connected to the ground grouting pump, and the other end is connected to a rotary joint; The rotary joint, also known as a "rotary sealing joint" or "slewing joint", has a fixed end connected to the grouting pipe 210 and a rotating end connected to the top grouting inlet of the grouting core pipe, forming a dynamic connection channel for grout transportation.

[0103] The core function of a rotary joint is to achieve sealed fluid transfer between a stationary pipe and a rotating component. It contains a precision-machined sealing cavity and bearing system; the outer ring is fixed, while the inner ring rotates synchronously with the grouting core tube.

[0104] The axis of the rotary joint is collinear with the axis of rotation of the grouting core tube. That is, the rotary joint is installed coaxially with the grouting core tube in the vertical direction (or design axis) to ensure: The slurry flow path is straight and smooth, reducing flow resistance and eddy current losses. Uniform force distribution during rotation avoids vibration or wear caused by eccentric torque. It is easily integrated with the drive unit 220 to form a unified "drive-seal-convey" upper assembly. The fixed end of the rotary joint is connected to the grouting pipe 210 via threads or a flange. The rotating end is connected to the top of the grouting core tube via an internal thread or quick-connect interface, ensuring synchronous rotation. The drive unit 220 (such as a motor or hydraulic motor) is mounted on the rotary joint housing, and its output shaft is connected to the rotating end via a coupling to achieve power transmission.

[0105] The coaxial integrated design ensures that the entire grouting pipe assembly 200 remains structurally stable during rotation, and the grout delivery is continuous and reliable, without leakage or blockage even during long-term continuous rotational grouting operations.

[0106] In some embodiments, the fitting is formed by connecting multiple sleeve valve pipes 110 in series.

[0107] In these embodiments, the tubes in the sleeve valve tube assembly 100 are not a single integral structure, but are formed by multiple sleeve valve tubes 110 connected in series along the axial direction to form an expandable tubular structure suitable for different drilling depths.

[0108] Each sleeve valve pipe 110 is typically 2–3 meters long and is made of high-strength PVC, polypropylene (PP), or stainless steel. It possesses good compressive strength, corrosion resistance, and a certain degree of flexibility, facilitating transportation and on-site assembly. Each section is connected quickly, securely, and reliably via a specialized connection structure, ensuring continuous axial flow throughout the entire pipe. An internal channel is formed for the sliding insertion of the grouting core pipe, while the sidewalls maintain the circumferential distribution of the grouting holes 111.

[0109] In different embodiments, the connection methods between two adjacent sleeve valve tubes 110 include, but are not limited to, the following: Threaded connection: External and internal threads are machined at the end of the pipe section, and a tight connection is achieved after screwing them in. To enhance sealing, PTFE tape can be wrapped around the threads or an O-ring sealing groove can be installed.

[0110] Socket connection: The end of one sleeve valve pipe 110 is inserted into the flared end (socket) of another section and fixed by clamps, locking rings or adhesive. It is suitable for PVC pipe fittings.

[0111] Flange connection: Weld or bolt flanges to both ends of the metal sleeve valve pipe 110, fasten adjacent pipe sections with bolts, and install rubber gaskets between flanges to achieve sealing.

[0112] Quick-connect connectors: Quick-connect connectors with elastic clips or steel ball locking mechanisms enable tool-free assembly and are suitable for frequent disassembly and assembly scenarios.

[0113] Regardless of the connection method used, it is essential to ensure that: the internal channels of the pipes have a smooth transition to avoid steps or diameter reduction that could cause the grouting core tube to become stuck; the outer diameters are consistent to ensure smooth lowering in the borehole; and the connection strength is sufficient to withstand its own weight and the tensile and compressive loads during construction.

[0114] Each sleeve valve pipe 110 has at least one set of grouting holes 111 circumferentially arranged on its side wall, centered in the axial direction. After multiple sections are connected in series, the grouting holes 111 on each section are evenly distributed along the axial direction of the entire pipe, which facilitates segmented grouting control.

[0115] In some embodiments, this application also provides a grouting system, which includes any of the grouting devices described in the above embodiments.

[0116] Since the above-mentioned grouting device has the above-mentioned technical effects, the grouting system including the grouting device should have the same technical effects, which will not be elaborated here.

[0117] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0118] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0119] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A grouting device, characterized in that, The grouting device includes: A sleeve valve tube assembly, the sleeve valve tube assembly including a tube fitting, wherein grouting holes are distributed on the circumferential side of the sidewall of the tube fitting; The grouting pipe assembly includes a grouting component rotatably disposed within the pipe. The grouting component has a grouting guide channel, and the grouting outlet of the grouting guide channel faces the side wall of the pipe. The rotatable configuration of the grouting component enables the grouting outlet to selectively communicate with grouting holes at different circumferential positions of the sleeve valve pipe.

2. The grouting device according to claim 1, characterized in that, The grouting pipe assembly further includes a sealing element disposed on the grouting component. The sealing element is distributed at least on the periphery of the grouting outlet and is used to seal the gap between the grouting outlet and the inner wall of the pipe component.

3. The grouting device according to claim 2, characterized in that, The grouting component includes a grouting core tube, which is slidably inserted inside the component. The grouting outlet is provided on the side wall of the grouting core tube, and the grouting guide channel includes the inner hole of the grouting core tube.

4. The grouting device according to claim 3, characterized in that, The sealing element includes an elastic sealing sleeve, which is sleeved and connected to the grouting core tube. The elastic sealing sleeve has an clearance opening, which is correspondingly connected to the grouting outlet. The outer peripheral wall of the elastic sealing sleeve fits against the inner peripheral wall of the pipe fitting to seal the annular gap between the grouting core tube and the pipe fitting.

5. The grouting device according to claim 4, characterized in that, The outer peripheral wall of the elastic sealing sleeve is provided with at least one groove, the at least one groove is provided at intervals along the axial direction of the grouting core tube, and the groove extends along the circumferential direction of the grouting core tube.

6. The grouting device according to claim 4, characterized in that, The elastic sealing sleeve includes a first elastic sealing sleeve, a second elastic sealing sleeve, and a third elastic sealing sleeve. The first elastic sealing sleeve, the second elastic sealing sleeve, and the third elastic sealing sleeve are arranged sequentially along the axial direction of the grouting core tube. The second elastic sealing sleeve has two ends in the circumferential direction, and the gap between the two ends of the second elastic sealing sleeve defines the clearance opening.

7. The grouting device according to claim 1, characterized in that, The grouting pipe assembly also includes a driving component, the grouting component and the driving component are connected, and the driving component can drive the grouting component to rotate; And / or, the grouting pipe assembly further includes an orientation sensor disposed on the grouting component, the orientation sensor being capable of detecting the orientation of the grouting outlet.

8. The grouting device according to claim 7, characterized in that, The grouting pipe assembly also includes a conveying component, which includes a grouting pipe and a rotary joint. One end of the grouting pipe is connected to the grouting inlet of the grouting guide channel through the rotary joint. The axis of the rotary joint and the rotation axis of the grouting component are collinear.

9. The grouting device according to claim 1, characterized in that, The fitting is composed of multiple sleeve valve pipes connected in series.

10. A grouting system, characterized in that, The grouting system includes the grouting device as described in any one of claims 1 to 9.

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