Grouting device for roadway surrounding rock reinforcement

Abstract

The grouting device for roadway surrounding rock reinforcement 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, the output end of the discharging pipe is connected with the input end of the grouting hose, and the plugging assembly is connected with the switch assembly. 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 surrounds the grouting steel pipe, the switch valve is arranged on the handheld pipe, a switch handle is arranged on the switch valve, and the switch assembly is connected with the switch handle. The switch handle is driven to control opening and closing of the switch valve. According to the grouting device for roadway surrounding rock reinforcement, fixing of the grouting steel pipe 8 and grouting work are conducted synchronously, and the overall working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a grouting device for reinforcing tunnel surrounding rocks. Background Art

[0002] With the rapid development of mining and underground engineering construction, the stability and safety of tunnel surrounding rock have become important issues in engineering. In order to ensure the safe use of tunnels and improve the stability of surrounding rock, it is usually necessary to reinforce the tunnel surrounding rock. At present, the commonly used method of tunnel surrounding rock reinforcement is to inject slurry into the gaps or cracks in the formation to improve the integrity and strength of the surrounding rock.

[0003] In the grouting operation of the related technology, multiple groups of holes are drilled in the stratum to prepare for grouting, and the grouting pipe is inserted into the hole. The grouting device is first connected with the grouting pipe to inject a section of slurry into the connection between the grouting pipe and the hole. After the slurry solidifies, a stop grouting section is formed to prevent the slurry from flowing back. Then the formal grouting is started to reinforce the surrounding rock. The overall preparation steps are cumbersome, and the stop grouting section needs to be formed after the slurry solidifies. The whole grouting process takes a long time, resulting in low work efficiency. Summary of the invention

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

[0005] To this end, an embodiment of the present invention provides a grouting device for tunnel surrounding rock reinforcement to solve the problem that the grouting operation takes a long time.

[0006] The grouting device for roadway surrounding rock reinforcement according to the embodiment of the present invention comprises:

[0007] A grouting machine, the grouting machine comprising a pump body, a feed pipe, a discharge pipe and a grouting hose, the feed pipe and the discharge pipe are respectively connected to the pump body, and the output end of the discharge pipe is connected to the input end of the grouting hose;

[0008] A plugging assembly, the plugging assembly comprises a hand-held tube, a grouting steel pipe, a bladder bag and a switch valve, the input end of the hand-held tube is connected to the output end of the grouting hose, the output end of the hand-held tube is connected to the input end of the grouting steel pipe, the bladder bag is arranged around the grouting steel pipe, the switch valve is arranged on the hand-held tube, and a switch handle is arranged on the switch valve;

[0009] A switch assembly is 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 bag, the input end of the thin hose is connected to the air pump through the air outlet pipe, and 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 through 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 wind hood, a wind wheel, an air outlet pipe, a connecting hose, a bending tube, a sliding shaft, a driving block and a sliding block. The mounting plate is arranged on the grouting machine, the wind hood is arranged on the mounting plate, and the wind wheel is arranged in the wind hood. The inner cavity of the wind hood is connected with the air outlet pipe, the connecting hose and the bending tube which are connected in sequence. A connecting block is provided between the bending tube and the hand-held tube to fix the two together. A portion of the sliding shaft is slidably provided in the bending tube, the driving block is connected to the portion of the sliding shaft extending out of the bending tube, the driving block is rotatably connected to the sliding block, and a sliding groove is provided on the switch handle, and the sliding block fits in the sliding groove.

[0013] In some embodiments, the switch assembly further includes a tension spring and a fixing ring, wherein the fixing ring is disposed in the bending tube, and the tension spring is located between the fixing ring and the sliding shaft and is connected to both.

[0014] In some embodiments, a matching mechanism is provided between the wind wheel and the motor so that the motor drives the wind wheel and the air pump to operate synchronously.

[0015] In some embodiments, the matching mechanism includes a rotating shaft and a pulley set, the rotating shaft is connected to the wheel shaft of the wind wheel, and the rotating shaft is connected to the power shaft through the pulley set.

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

[0017] In some embodiments, a hard tube is provided at the connection between the grouting hose and the hand-held tube.

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

[0019] In summary, the grouting device for tunnel surrounding rock reinforcement in the embodiment of the present invention solves the problem of cumbersome overall preparation steps in the related technology through the coordinated operation of the sealing component and the switch component, and also requires the slurry to solidify before forming a grouting stop section. The entire grouting process is time-consuming, resulting in low work efficiency.

[0020] When reinforcing the surrounding rock of the tunnel, after the formation drilling is completed, the sealing component is controlled to operate, so that the bag outside the grouting steel pipe expands until it is close to the inner wall of the hole, forming a grouting stop section, which is suitable for boreholes of different diameters. At the same time, the switch component operates to open the switch valve on the hand-held tube, so that the mixed slurry flows into the borehole through the grouting steel pipe to reinforce the surrounding rock on the tunnel. Among them, the gas speed of the air pump is faster than the air flow inside the wind hood, and the aperture of the thin hose is smaller than the aperture of the grouting hose. When the slurry flows out through the grouting steel pipe, the bag has been fully expanded to seal the hole. The formation of the grouting stop section and the grouting work are carried out simultaneously, which improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0023] Figure 3 yes Figure 2 Enlarged schematic diagram of part A.

[0024] Figure 4 It is a schematic structural diagram of the overall coordination of the blocking component and the switch component in an embodiment of the present invention.

[0025] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0026] Figure 6 It is a schematic diagram of the partial structure of the blocking component according to an embodiment of the present invention.

[0027] Figure 7 It is a structural schematic diagram of partial coordination between a blocking component and a switch component in an embodiment of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure inside the bending tube of an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. Grouting machine; 2. Pump body; 3. Feed pipe; 4. Discharge pipe; 5. Grouting hose; 6. Blocking assembly; 7. Hand-held tube; 8. Grouting steel pipe; 9. Bag; 10. Switch valve; 11. Switch handle; 12. Slide slot; 13. Switch assembly; 14. Thin hose; 15. Air pump; 16. Air outlet pipe; 17. Power mechanism; 18. Motor; 19. Power shaft; 20. Mounting frame; 21. Mounting plate; 22. Wind hood; 23. Wind wheel; 24. Air outlet pipe; 25. Connecting hose; 26. Bending pipe; 27. Sliding shaft; 28. Connecting block; 29. ​​Driving block; 30. Sliding block; 31. Matching mechanism; 32. Rotating shaft; 33. Pulley set; 34. Tension spring; 35. Fixed ring; 36. Hoop. DETAILED DESCRIPTION

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

[0032] The grouting device for reinforcing surrounding rock of a tunnel according to an embodiment of the present invention will be described below in conjunction with the accompanying drawings.

[0033] like Figures 1 to 8 As shown, the grouting device for tunnel surrounding rock reinforcement according to an embodiment of the present invention comprises: a grouting machine 1, a plugging component 6 and a switch component 13.

[0034] The grouting machine 1 includes a pump body 2, a feed pipe 3, a discharge pipe 4 and a grouting hose 5. The feed pipe 3 and the discharge pipe 4 are respectively connected to the pump body 2, and the slurry is drawn into the feed pipe 3 through the pump body 2 and discharged from the discharge pipe 4. The output end of the discharge pipe 4 is connected to the input end of the grouting hose 5, and the slurry is transported through the grouting hose 5.

[0035] The plugging assembly 6 includes a hand-held tube 7, a grouting steel pipe 8, a bag 9 and a switch valve 10. The input end of the hand-held tube 7 is connected to the output end of the grouting hose 5, and the output end of the hand-held tube 7 is connected to the input end of the grouting steel pipe 8. The staff holds the hand-held tube 7 and inserts the grouting steel pipe 8 into the drilled hole, so that the slurry transported by the grouting hose 5 is sequentially sent into the borehole through the hand-held tube 7 and the grouting steel pipe 8.

[0036] It should be noted that during the grouting operation, since the slurry is heavy, the connection between the grouting hose 5 and the hand-held tube 7 is bent for a long time. In order to prevent damage to the connection, a hard tube is provided at the connection between the grouting hose 5 and the hand-held tube 7.

[0037] The bladder bag 9 is arranged around the grouting steel pipe 8, and the bladder bag 9 is inflated to expand to be close to the inner wall of the hole, forming a grouting stop section. In order to make the position of the bladder bag 9 more stable when inflated, the two ends of the outer side of the bladder bag 9 are fixed to the grouting steel pipe 8 by clamps 36, thereby improving the stability of the plugging.

[0038] The switch valve 10 is provided on the hand-held tube 7, and a switch handle 11 is provided on the switch valve 10. The 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 can be understood that during the grouting operation, the inflation of the bladder 9 and the switch assembly 13 driving the switch handle 11 to open the switch valve 10 are performed synchronously. When the bladder 9 expands and clings to the hole wall, the switch valve 10 is also opened to allow the slurry to flow into the hole, thereby improving the work efficiency.

[0039] In some embodiments, Figures 1 to 7 As shown, the plugging assembly 6 includes a thin hose 14, an air pump 15 and an air outlet pipe 16. The output end of the thin hose 14 is connected to the inner cavity of the bladder bag 9, and the input end of the thin hose 14 is connected to the air pump 15 through the air outlet pipe 16. When the air pump 15 is operated, the gas is sequentially sent into the bladder bag 9 through the air outlet pipe 16 and the thin hose 14 to expand the bladder bag 9. In order to quickly discharge the gas in the bladder bag 9 at the end of the grouting work, a quick disassembly joint is provided at the connection between the air outlet pipe 16 and the thin hose 14.

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

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

[0042] The mounting plate 21 is arranged on the grouting machine 1, the wind shield 22 is arranged on the mounting plate 21, and the wind wheel 23 is arranged in the wind shield 22. The inner cavity of the wind shield 22 is communicated with the air outlet pipe 24, the connecting hose 25 and the bending pipe 26 which are connected in sequence. A connecting block 28 is arranged between the bending pipe 26 and the hand-held pipe 7 so that the two are fixedly connected. The part of the sliding shaft 27 is slidably arranged in the bending pipe 26, the driving block 29 is connected to the part of the sliding shaft 27 extending out of the bending pipe 26, and the driving block 29 is rotatably connected to the sliding block 30. The switch handle 11 is provided with a sliding groove 12, and the sliding block 30 is matched in the sliding groove 12.

[0043] It can be understood that the wind wheel 23 rotates, sending the gas into the bending tube 26 through the air outlet pipe 24 and the connecting hose 25 in turn, and the gas pushes the sliding shaft 27 to slide out, driving the sliding block 30 to slide in the sliding groove 12 through the driving block 29, thereby driving the switch handle 11 to rotate and open the switch valve 10.

[0044] Furthermore, the switch assembly 13 further includes a tension spring 34 and a fixing ring 35, wherein the fixing ring 35 is disposed in the bent tube 26, and the tension spring 34 is located between and connected to the fixing ring 35 and the sliding shaft 27. When the wind wheel 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, Figures 1 to 7 As shown, a matching mechanism 31 is provided between the wind wheel 23 and the motor 18, so that the motor 18 drives the wind wheel 23 and the air pump 15 to operate synchronously. The wind wheel 23 and the air pump 15 can be driven by one driving member, thereby reducing the cost of the device.

[0046] Optionally, the matching mechanism 31 includes a rotating shaft 32 and a pulley set 33 , the rotating shaft 32 is connected to the wheel shaft of the wind wheel 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 reinforcing surrounding rock of a tunnel according to an embodiment of the present invention is described in detail below.

[0048] When reinforcing the surrounding rock of the tunnel, first drill a hole on the tunnel rock wall. Connect the feed pipe 3 with the mixed slurry, then hold the hand-held tube 7 and insert the grouting steel pipe 8 directly into the drilled hole until the bag 9 on the outside of the grouting steel pipe 8 is located at the hole mouth. Then, control the motor 18 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 under the mounting frame 20 to operate. The gas in the air pump 15 enters the thin hose 14 through the outlet pipe 16, and enters the bag 9 through the thin hose 14. The bag 9 continues to expand until it is close to the inner wall of the hole to form a slurry stop section, and 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 has been fixed.

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

[0050] The airflow pushes the sliding shaft 27 toward the outside of the bending tube 26, and the tension spring 34 is stretched. When the sliding shaft 27 slides toward the outside, the driving block 29 fixedly connected to the sliding shaft 27 moves along with it, and the driving block 29 pushes the sliding block 30, and the sliding block 30 is pushed to slide in the sliding groove 12. During this process, the sliding block 30 and the driving block 29 rotate accordingly.

[0051] By the cooperation of the driving block 29, the sliding block 30 and the sliding groove 12, the switch handle 11 is rotated forward at this time, and then the switch valve 10 is opened. The pump body 2 then passes the slurry through the discharge pipe 4, the grouting hose 5 and the hand-held tube 7 in sequence, and finally enters the grouting steel pipe 8, and flows out from the multiple groups of material holes on the grouting steel pipe 8, thereby realizing the reinforcement of the surrounding rock.

[0052] It should be noted that the gas flow rate of the air pump 15 is greater than the gas flow rate of the wind wheel 23, and the diameter of the thin hose 14 is smaller than the diameter of the grouting hose 5. When the slurry flows out through the grouting steel pipe 8, the bag 9 has been fully expanded to seal the hole.

[0053] After the reinforcement work is completed, the quick-disassembly joints at the air outlet pipe 16 and the thin hose 14 are removed, and the bag 9 shrinks quickly. After the motor 18 stops running, the tension spring 34 in the bending tube 26 shrinks, and the sliding shaft 27 is pulled into the bending tube 26 to reset through the fixing ring 35. The driving block 29 drives the sliding block 30 to move again, driving the switch handle 11 to rotate in the opposite direction, and closing the switch valve 10.

[0054] In summary, in the grouting device for tunnel surrounding rock reinforcement according to the embodiment of the present invention, the fixing of the grouting steel pipe 8 and the grouting work are carried out simultaneously, thereby improving the overall work efficiency.

[0055] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, 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 present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A grouting device for tunnel surrounding rock reinforcement, characterized in that: include: A grouting machine, the grouting machine comprising a pump body, a feed pipe, a discharge pipe and a grouting hose, the feed pipe and the discharge pipe are respectively connected to the pump body, and the output end of the discharge pipe is connected to the input end of the grouting hose; A plugging assembly, the plugging assembly comprises a hand-held tube, a grouting steel pipe, a bladder bag and a switch valve, the input end of the hand-held tube is connected to the output end of the grouting hose, the output end of the hand-held tube is connected to the input end of the grouting steel pipe, the bladder bag is arranged around the grouting steel pipe, the switch valve is arranged on the hand-held tube, and a switch handle is arranged on the switch valve; A switch assembly is connected to the switch handle to drive the switch handle to control the opening and closing of the switch valve.

2. The grouting device for tunnel surrounding rock reinforcement according to claim 1, characterized in that: The blocking component 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 bag, 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.

3. The grouting device for tunnel surrounding rock reinforcement according to claim 2 is characterized in that: The power mechanism of the grouting machine includes an electric motor and a power shaft. The electric motor is connected to the air pump through the power shaft to drive the air pump to operate. A mounting frame for fixing the air pump is provided on the electric motor.

4. The grouting device for tunnel surrounding rock reinforcement according to claim 3 is characterized in that: The switch assembly includes a mounting plate, an air hood, an air wheel, an air outlet pipe, a connecting hose, a bending pipe, a sliding shaft, a driving block and a sliding block. The mounting plate is arranged on the grouting machine, the air hood is arranged on the mounting plate, the air wheel is arranged in the air hood, the inner cavity of the air hood is communicated with the air outlet pipe, the connecting hose and the bending pipe which are connected in sequence, a connecting block is provided between the bending pipe and the hand-held pipe to fix the two together, a part of the sliding shaft is slidably provided in the bending pipe, the driving block is connected to the part of the sliding shaft extending out of the bending pipe, the driving block is rotatably connected to the sliding block, a sliding groove is provided on the switch handle, and the sliding block fits in the sliding groove.

5. The grouting device for tunnel surrounding rock reinforcement according to claim 4, characterized in that: The switch assembly further comprises a tension spring and a fixing ring, wherein the fixing ring is arranged in the bending tube, and the tension spring is located between the fixing ring and the sliding shaft and is connected to both.

6. The grouting device for tunnel surrounding rock reinforcement according to claim 4, characterized in that: A matching mechanism is provided between the wind wheel and the electric motor so that the electric motor drives the wind wheel and the air pump to operate synchronously.

7. The grouting device for tunnel surrounding rock reinforcement according to claim 6, characterized in that: The matching mechanism comprises a rotating shaft and a pulley set, the rotating shaft is connected to the wheel shaft of the wind wheel, and the rotating shaft is connected to the power shaft through the pulley set.

8. The grouting device for tunnel surrounding rock reinforcement according to claim 1, characterized in that: The two ends of the bag are fixed on the grouting steel pipe through clamps.

9. The grouting device for tunnel surrounding rock reinforcement according to claim 1, characterized in that: A hard pipe is provided at the connection between the grouting hose and the hand-held pipe.

10. The grouting device for tunnel surrounding rock reinforcement according to claim 2, characterized in that: A quick-disassembly joint is provided at the connection between the air outlet pipe and the thin hose.

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