A grouting device for roadway surrounding rock reinforcement

Abstract

The application discloses a grouting device for roadway surrounding rock reinforcement, which comprises a grouting machine, a plugging assembly and a switch assembly. The grouting machine comprises a pump body, a feeding pipe, a discharging pipe and a grouting hose. The feeding pipe and the discharging pipe are connected with the pump body respectively. The output end of the discharging pipe is connected with the input end of the grouting hose. The plugging assembly comprises a handheld pipe, a grouting steel pipe, a bag and a switch valve. The input end of the handheld pipe is connected with the output end of the grouting hose. The output end of the handheld pipe is connected with the input end of the grouting steel pipe. The bag is arranged around the grouting steel pipe. The switch valve is arranged on the handheld pipe. A switch handle is arranged on the switch valve. The switch assembly is connected with the switch handle to drive the switch handle to control the opening and closing of the switch valve. The grouting device for roadway surrounding rock reinforcement of the embodiment has the advantages that the fixing of the grouting steel pipe 8 and the grouting work are synchronously performed, and the overall working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and in particular to a grouting device for reinforcing the surrounding rock of tunnels. Background Technology

[0002] With the rapid development of mining and underground engineering construction, the stability and safety of surrounding rock in tunnels have become crucial issues. To ensure the safe use of tunnels and improve the stability of the surrounding rock, it is usually necessary to reinforce it. Currently, a common method for reinforcing surrounding rock is to inject grout into the voids or fissures of the strata, thereby improving the integrity and strength of the surrounding rock.

[0003] The grouting operation using this technology involves drilling multiple sets of holes in the strata to prepare for grouting. Grouting pipes are then inserted into these holes. First, using a grouting device connected to the grouting pipe, a section of grout is injected into the connection point. Once the grout solidifies, a stop section is formed to prevent backflow before the actual grouting begins to reinforce the surrounding rock. This entire preparation process is cumbersome and requires waiting for the grout to solidify and form a stop section, resulting in a lengthy grouting process and low work efficiency. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention propose a grouting device for reinforcing the surrounding rock of a roadway to solve the problem of long grouting operation time.

[0006] The grouting device for reinforcing the surrounding rock of a roadway according to an embodiment of the present invention includes:

[0007] The grouting machine includes a pump body, an inlet pipe, an outlet pipe, and a grouting hose. The inlet pipe and the outlet pipe are respectively connected to the pump body, and the output end of the outlet pipe is connected to the input end of the grouting hose.

[0008] A sealing assembly includes a handheld tube, a grouting steel pipe, a bladder, and a switch valve. The input end of the handheld tube is connected to the output end of the grouting hose, and the output end of the handheld tube is connected to the input end of the grouting steel pipe. The bladder is arranged around the grouting steel pipe, and the switch valve is located on the handheld tube and has a switch handle.

[0009] A switch assembly connected to the switch handle to drive the switch handle to control the opening and closing of the switch valve.

[0010] In some embodiments, the sealing assembly includes a thin hose, an air pump, and an air outlet pipe. The output end of the thin hose is connected to the inner cavity of the bladder, and the input end of the thin hose is connected to the air pump through the air outlet pipe. The air pump is connected to the power mechanism of the grouting machine.

[0011] In some embodiments, the power mechanism of the grouting machine includes an electric motor and a power shaft. The electric motor is connected to the air pump via the power shaft to drive the air pump to operate. The electric motor is provided with a mounting bracket for fixing the air pump.

[0012] In some embodiments, the switch assembly includes a mounting plate, a fan shroud, a fan wheel, an air outlet pipe, a connecting hose, a bent pipe, a sliding shaft, a driving block, and a sliding block. The mounting plate is mounted on the grouting machine, the fan shroud is mounted on the mounting plate, the fan wheel is located inside the fan shroud, the inner cavity of the fan shroud communicates with the air outlet pipe, the connecting hose, and the bent pipe connected in sequence, a connecting block is provided between the bent pipe and the handheld tube to fix the two together, a portion of the sliding shaft is slidably disposed inside the bent pipe, the driving block is connected to the portion of the sliding shaft extending out of the bent pipe, the driving block is rotatably connected to the sliding block, the switch handle is provided with a sliding groove, and the sliding block is fitted into the sliding groove.

[0013] In some embodiments, the switch assembly further includes a tension spring and a retaining ring, the retaining ring being disposed within the bent tube, and the tension spring being located between and connected to the retaining ring and the sliding shaft.

[0014] In some embodiments, a cooperating mechanism is provided between the wind turbine and the electric motor to enable the electric motor to drive the wind turbine and the air pump to operate synchronously.

[0015] In some embodiments, the cooperating mechanism includes a rotating shaft and a pulley assembly, the rotating shaft being connected to the axle of the wind turbine, and the rotating shaft being connected to the power shaft via the pulley assembly.

[0016] In some embodiments, the two ends of the bladder are fixed to the grouting steel pipe by clamps.

[0017] In some embodiments, a rigid tube is provided at the connection between the grouting hose and the handheld tube.

[0018] In some embodiments, a quick-release connector is provided at the connection between the air outlet pipe and the thin flexible tube.

[0019] In summary, the grouting device for reinforcing the surrounding rock of the tunnel according to the present invention solves the problems of cumbersome overall preparation steps, the need to wait for the grout to solidify and form a grout stop section, and the long time consumption of the entire grouting process, which leads to low work efficiency, by cooperating with the sealing component and the switching component.

[0020] During the reinforcement of the surrounding rock in roadways, after drilling is completed, the sealing assembly is activated to inflate the bladder outside the grouting steel pipe until it tightly adheres to the inner wall of the borehole, forming a grout-stopping section. This method is applicable to boreholes of different diameters. Simultaneously, the switching assembly operates, opening the valve on the handheld pipe to allow the mixed grout to flow into the borehole through the grouting steel pipe, reinforcing the surrounding rock in the roadway. The air pump's gas velocity is faster than the airflow inside the ventilation hood, and the orifice of the thin hose is smaller than that of the grouting hose. When the grout flows out through the grouting steel pipe, the bladder has fully inflated, sealing the borehole. The formation of the grout-stopping section and the grouting work occur simultaneously, improving work efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first structure of the grouting device for reinforcing the surrounding rock of a roadway according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the first structure of the grouting device for reinforcing the surrounding rock of a roadway according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0024] Figure 4 This is a schematic diagram of the overall structure of the blocking component and the switching component in an embodiment of the present invention.

[0025] Figure 5 yes Figure 4 Enlarged diagram of part B.

[0026] Figure 6 This is a partial structural schematic diagram of the sealing component according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the partial cooperation between the blocking component and the switching component in an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the internal structure of the bent tube according to an embodiment of the present invention.

[0029] Figure label:

[0030] 1. Grouting machine; 2. Pump body; 3. Feed pipe; 4. Discharge pipe; 5. Grouting hose; 6. Sealing assembly; 7. Handheld hose; 8. Grouting steel pipe; 9. Bag; 10. Switch valve; 11. Switch handle; 12. Sliding groove; 13. Switch assembly; 14. Thin hose; 15. Air pump; 16. Air outlet pipe; 17. Power mechanism; 18. Electric motor; 19. Power shaft; 20. Mounting bracket; 21. Mounting plate; 22. Air hood; 23. Fan wheel; 24. Air outlet pipe; 25. Connecting hose; 26. Bend pipe; 27. Sliding shaft; 28. Connecting block; 29. ​​Driving block; 30. Sliding block; 31. Coupling mechanism; 32. Rotating shaft; 33. Pulley assembly; 34. Tension spring; 35. Fixing ring; 36. Clamp. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The grouting device for reinforcing the surrounding rock of a roadway according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0033] like Figures 1 to 8 As shown, the grouting device for reinforcing the surrounding rock of a roadway according to an embodiment of the present invention includes: a grouting machine 1, a sealing component 6, and a switching component 13.

[0034] Grouting machine 1 includes a pump body 2, an inlet pipe 3, an outlet pipe 4, and a grouting hose 5. The inlet pipe 3 and the outlet pipe 4 are respectively connected to the pump body 2, and the pump body 2 draws the grout in from the inlet pipe 3 and discharges it from the outlet pipe 4. The output end of the outlet pipe 4 is connected to the input end of the grouting hose 5, and the grout is transported through the grouting hose 5.

[0035] The sealing assembly 6 includes a handheld pipe 7, a grouting steel pipe 8, a bladder 9, and a switch valve 10. The input end of the handheld pipe 7 is connected to the output end of the grouting hose 5, and the output end of the handheld pipe 7 is connected to the input end of the grouting steel pipe 8. The worker holds the handheld pipe 7 and inserts the grouting steel pipe 8 into the drilled hole, so that the grout delivered by the grouting hose 5 is sequentially delivered into the drill hole through the handheld pipe 7 and the grouting steel pipe 8.

[0036] It should be noted that during grouting operations, because the grout is heavy and the connection between the grouting hose 5 and the handheld hose 7 is bent for a long time, a rigid pipe is installed at the connection between the grouting hose 5 and the handheld hose 7 to prevent damage to the connection.

[0037] The grouting bag 9 is arranged around the grouting steel pipe 8. By inflating the grouting bag 9, it expands to fit tightly against the inner wall of the hole, forming a grout-stopping section. To make the position of the grouting bag 9 more stable during expansion, the two outer ends of the grouting bag 9 are fixed to the grouting steel pipe 8 by clamps 36, thereby improving the stability of the sealing.

[0038] A switch valve 10 is mounted on the hand-held pipe 7, and a switch handle 11 is provided on the switch valve 10. A switch assembly 13 is connected to the switch handle 11 to drive the switch handle 11 to control the opening and closing of the switch valve 10. It is understood that during grouting operations, the inflation of the bladder 9 and the opening of the switch valve 10 by the switch assembly 13 are carried out synchronously. When the bladder 9 inflates and presses tightly against the borehole wall, the switch valve 10 also opens to allow grout to flow into the borehole, improving work efficiency.

[0039] In some embodiments, such as Figures 1 to 7 As shown, the sealing assembly 6 includes a thin flexible tube 14, an air pump 15, and an air outlet pipe 16. The output end of the thin flexible tube 14 communicates with the inner cavity of the bladder 9, and the input end of the thin flexible tube 14 is connected to the air pump 15 via the air outlet pipe 16. When the air pump 15 operates, gas is sequentially delivered into the bladder 9 through the air outlet pipe 16 and the thin flexible tube 14 to inflate the bladder 9. To quickly expel the gas from the bladder 9 after the grouting operation is completed, a quick-release connector is provided at the connection between the air outlet pipe 16 and the thin flexible tube 14.

[0040] Optionally, the air pump 15 is connected to the power mechanism 17 of the grouting machine 1. The power mechanism 17 of the grouting machine 1 includes an electric motor 18 and a power shaft 19. The electric motor 18 is connected to the air pump 15 through the power shaft 19 to drive the air pump 15 to operate. The electric motor 18 is provided with a mounting bracket 20 for fixing the air pump 15.

[0041] In some embodiments, such as Figures 1 to 8 As shown, the switch assembly 13 includes a mounting plate 21, a fan cover 22, a fan wheel 23, an air outlet pipe 24, a connecting hose 25, a bend pipe 26, a sliding shaft 27, a drive block 29, and a sliding block 30.

[0042] Mounting plate 21 is mounted on grouting machine 1, air hood 22 is mounted on mounting plate 21, and impeller 23 is located inside air hood 22. The inner cavity of air hood 22 is connected to air outlet pipe 24, connecting hose 25, and bend pipe 26 in sequence. A connecting block 28 is provided between bend pipe 26 and handheld pipe 7 to fix them together. Part of sliding shaft 27 is slidably disposed inside bend pipe 26, driving block 29 is connected to the part of sliding shaft 27 extending out of bend pipe 26, driving block 29 is rotatably connected to sliding block 30, and switch handle 11 is provided with sliding groove 12, with sliding block 30 fitting in sliding groove 12.

[0043] Understandably, when the impeller 23 rotates, it sends gas through the outlet pipe 24 and the connecting hose 25 into the bent pipe 26. The gas pushes the sliding shaft 27 to slide out, which drives the sliding block 30 to slide in the sliding groove 12 through the drive block 29, thereby causing the switch handle 11 to rotate and open the switch valve 10.

[0044] Furthermore, the switch assembly 13 also includes a tension spring 34 and a retaining ring 35. The retaining ring 35 is disposed inside the bent tube 26, and the tension spring 34 is located between and connected to the sliding shaft 27. When the impeller 23 stops rotating, the sliding shaft 27 is reset under the action of the tension spring 34, thereby driving the switch handle 11 to close the switch valve 10.

[0045] In some embodiments, such as Figures 1 to 7 As shown, a cooperating mechanism 31 is provided between the wind turbine 23 and the electric motor 18 so that the electric motor 18 drives the wind turbine 23 and the air pump 15 to operate synchronously. The wind turbine 23 and the air pump 15 can be driven by a single driving component, which reduces the cost of the device.

[0046] Optionally, the cooperating mechanism 31 includes a rotating shaft 32 and a pulley set 33. The rotating shaft 32 is connected to the axle of the wind turbine 23, and the rotating shaft 32 is connected to the power shaft 19 through the pulley set 33.

[0047] The working principle of the grouting device for roadway surrounding rock reinforcement according to an embodiment of the present invention is described in detail below.

[0048] When reinforcing the surrounding rock of the tunnel, holes are first drilled in the tunnel wall. The feed pipe 3 is connected to the mixed grout, and then the hand-held pipe 7 is held, and the grouting steel pipe 8 is directly inserted into the drilled hole until the outer bag 9 of the grouting steel pipe 8 is at the hole opening. Then, the motor 18 is controlled to run, and the output end of the motor 18 drives the power shaft 19 to rotate. The power shaft 19 then drives the air pump 15 below the mounting frame 20 to operate. The gas in the air pump 15 enters the thin hose 14 through the air outlet pipe 16, and then enters the bag 9 through the thin hose 14. The bag 9 continuously expands until it is tightly attached to the inner wall of the hole, forming a grout-stopping section. The clamp 36 on the bag 9 can ensure that the position of the bag 9 is fixed. At this time, the position of the grouting steel pipe 8 is fixed.

[0049] When the power shaft 19 rotates, it drives the rotating shaft 32 to rotate through the transmission connection of the pulley group 33. The rotating shaft 32 drives the impeller 23 to rotate in the wind cover 22, generating airflow. Since the air outlet pipe 24, the connecting hose 25 and the bend pipe 26 are interconnected, the airflow enters the air outlet pipe 24 through the air outlet end of the wind cover 22, and then enters the connecting hose 25 through the air outlet pipe 24. The airflow in the connecting hose 25 then enters the bend pipe 26.

[0050] The airflow pushes the sliding shaft 27 outwards towards the outside of the bent tube 26, and the tension spring 34 extends in response. As the sliding shaft 27 slides outwards, the drive block 29, which is fixedly connected to the sliding shaft 27, moves accordingly, pushing the sliding block 30. The sliding block 30 is then pushed to slide in the sliding groove 12. During this process, the sliding block 30 and the drive block 29 rotate accordingly.

[0051] By cooperating with the drive block 29, the sliding block 30 and the sliding groove 12, the switch handle 11 is rotated in the forward direction, thereby opening the switch valve 10. The pump body 2 then sends the slurry through the discharge pipe 4, the grouting hose 5 and the hand-held pipe 7 in sequence, and finally into the grouting steel pipe 8. The slurry flows out from the multiple sets of material holes on the grouting steel pipe 8, thereby achieving the reinforcement of the surrounding rock.

[0052] It should be noted that the gas flow rate of the air pump 15 is greater than that of the impeller 23, and the diameter of the thin hose 14 is smaller than that of the grouting hose 5. Therefore, when the grout flows out through the grouting steel pipe 8, the bag 9 has already fully expanded and sealed the hole.

[0053] After the reinforcement work is completed, the quick-release connector at the outlet pipe 16 and the thin hose 14 is removed, and the bag 9 quickly contracts. After the motor 18 stops running, the tension spring 34 in the bent tube 26 retracts and is fixed by the retaining ring 35, thereby pulling the sliding shaft 27 back into the bent tube 26. The driving block 29 then drives the sliding block 30 to move again, causing the switch handle 11 to rotate in the opposite direction and close the switch valve 10.

[0054] In summary, the grouting device for reinforcing the surrounding rock of the roadway according to the embodiments of the present invention allows for the simultaneous fixing of the grouting steel pipe 8 and the grouting work, thereby improving the overall work efficiency.

[0055] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0056] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A grouting device for roadway surrounding rock reinforcement, characterized by, The application relates to a grouting machine. The grouting machine comprises a pump body, a feeding pipe and a discharging pipe connected with the pump body respectively, and a grouting hose connected with the discharging pipe. The plugging assembly comprises a hand-held pipe, a grouting steel pipe, a bag and a switch valve. The switch assembly is connected with the switch handle to drive the switch handle to control the switch valve.

2. The grouting device for reinforcing surrounding rock of a roadway according to claim 1, characterized in that, The switch assembly comprises a mounting plate, a fan cover, a fan wheel, an air outlet pipe, a connecting hose, a bent pipe, a sliding shaft, a driving block and a sliding block.

3. The grouting device for reinforcing surrounding rock of a roadway according to claim 2, characterized in that, The fan wheel and the motor are provided with a cooperation mechanism to synchronize the operation of the fan wheel and the motor.

4. The grouting device for reinforcing surrounding rock of a roadway according to claim 3, characterized in that, The cooperation mechanism comprises a rotating shaft and a belt pulley group.

5. The grouting device for reinforcing surrounding rock of a roadway according to claim 3, characterized in that, The two ends of the bag are fixed on the grouting steel pipe through a hoop.

6. The grouting device for reinforcing surrounding rock of a roadway according to claim 5, characterized in that, The connection between the grouting hose and the hand-held pipe is provided with a hard pipe.

7. The grouting device for reinforcing surrounding rock of a roadway according to claim 1, characterized in that, The connection between the air outlet pipe and the thin hose is provided with a quick dismounting joint.

8. The grouting device for reinforcing surrounding rock of a roadway according to claim 1, characterized in that, ​ 9. The grouting device for reinforcing surrounding rock of a roadway according to claim 2, characterized in that, ​

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