A tunnel cave plugging device

Abstract

The application belongs to the technical field of tunnel construction and provides a tunnel cave plugging device, which comprises a conveying pipe, one end of the conveying pipe is connected with one end of an expansion sleeve through a connecting flange, one end of the expansion sleeve is slidably installed with a grouting pipe, one end of the grouting pipe is fixed with a grouting disc, and the device further comprises a control mechanism, the control mechanism comprises a rotating assembly, a reciprocating assembly and a connecting seat, one end of the rotating assembly is slidably connected with the outer wall of the grouting pipe, the other end of the rotating assembly is connected with the reciprocating assembly installed on the connecting seat, and one end of the reciprocating assembly is movably connected with the grouting pipe. The tunnel cave plugging device can cooperate with the conveying pipe, the expansion sleeve, the grouting pipe and the grouting disc, so that the inner wall of the grouting hole can be reciprocally impacted while grouting in the grouting hole, thereby realizing the solid wall treatment of the grouting hole and ensuring that the hardened mud can meet the required bearing capacity requirement.

Description

Technical Field

[0001] This invention belongs to the field of tunnel construction technology, and in particular relates to a sealing device for tunnel karst caves. Background Technology

[0002] Due to varying terrains across different regions, most tunnels encounter karst caves during construction. These caves vary in shape and are often scattered and disorganized. Some are large-scale, with two to three layers of caves distributed vertically. Tunnel karst caves can be categorized into small caves, large caves above the arch, and large caves below the arch. Common filling materials within these caves include accumulated water, silt, and slippery mud, along with debris such as gravel and rocks. To ensure the progress and quality of tunnel construction, timely reinforcement and sealing of these karst caves are necessary.

[0003] Existing sealing devices for tunnel karst caves include drilling machines and grouting machines. The drilling machine drills grouting holes in the karst cave, and the grouting machine injects mud into the grouting holes and the karst cave through grouting pipes. The hardened mud forms a load-bearing foundation, enhances the stability of the surrounding rock, and thus seals the karst cave, forming a sealed karst cave body.

[0004] While existing sealing devices for tunnel karst caves can seal them, to ensure that the hardened mud meets the load-bearing requirements, the inner wall of the grouting hole needs to be solidified before grouting. However, existing devices only drill the grouting hole and lack the work of solidifying the grouting hole wall, which will affect the load-bearing capacity of the hardened mud and further affect the tunnel construction.

[0005] Therefore, in view of the above situation, there is an urgent need to develop a sealing device for tunnel karst caves to overcome the shortcomings in current practical applications. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a sealing device for tunnel karst caves to solve the problems mentioned in the background.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A sealing device for tunnel karst caves includes a delivery pipe, one end of which is installed on the output end of a grouting pump, and the other end of which is connected to one end of a telescopic sleeve via a connecting flange. The telescopic sleeve includes a main pipe and a telescopic pipe. One end of the main pipe is connected to the connecting flange, and the telescopic pipe is slidably installed at the other end of the main pipe. An adjustment mechanism for adjusting the telescopic pipe's extension length is installed on the outer wall of the main pipe. A grouting pipe is slidably installed at one end of the telescopic pipe, and a grouting disc is fixed to one end of the grouting pipe. The grouting disc has grouting holes distributed on it for spraying slurry. The device also includes:

[0009] The control mechanism includes a rotating component, a reciprocating component, and a connecting seat. The rotating component is installed on the end wall of the telescopic pipe near the grouting pipe. One end of the rotating component is slidably connected to the outer wall of the grouting pipe, and the other end of the rotating component is connected to the reciprocating component installed on the connecting seat. The connecting seat is fixed on the telescopic pipe.

[0010] The reciprocating assembly includes a coupling, a worm gear, a worm wheel, a rotating component, a second connecting component, a deflecting component, a third gear, and gear teeth. One end of the coupling is connected to the output end of the rotating assembly, and the other end of the coupling is connected to the worm gear movably mounted on the connecting seat. The worm gear cooperates with the worm wheel, and a rotating component is fixed on the worm wheel. One end of the rotating component is movably connected to the deflecting component through the second connecting component. The deflecting component is fixed on the third gear, and the third gear is movably mounted on the connecting seat. One end of the third gear meshes with gear teeth distributed on the outer wall of the grouting pipe.

[0011] The rotating component simultaneously drives the grouting pipe and the coupling to rotate. The grouting pipe drives the grouting disc to rotate, and the coupling drives the worm gear to rotate. The worm gear drives the rotating component to rotate through the worm wheel. Since the length of the deflecting component is greater than the length of the rotating component, the rotating component drives the deflecting component to reciprocate through the second connecting component. The deflecting component drives the third gear to reciprocate. The third gear drives the grouting pipe to reciprocate on the telescopic pipe through its teeth. The grouting pipe drives the grouting disc to reciprocate. The grouting disc simultaneously injects grout into the grouting hole of the karst cave and reciprocates to impact the inner wall of the grouting hole of the karst cave through rotation and reciprocating movement.

[0012] As a further technical solution of the present invention, the rotating assembly includes a second driving component, a transmission module, a mounting shaft, a first gear, a second gear, and a mounting sleeve. The second driving component is fixed on the telescopic tube. The output end of the second driving component is connected to one end of the mounting shaft through the transmission module. The other end of the mounting shaft extends into the mounting sleeve and is connected to the first gear. The first gear meshes with the second gear fitted on the outer wall of the grouting pipe. Both the first gear and the second gear are installed in the mounting sleeve. The mounting sleeve is fixed on the telescopic tube. One end of the mounting shaft is also connected to a worm gear through a coupling.

[0013] As a further technical solution of the present invention, the second gear is a ring-shaped gear, and the inner wall of the second gear is equipped with a key that matches the keyway opened on the outer wall of the grouting pipe.

[0014] As a further technical solution of the present invention, the adjustment mechanism includes an adjustment component, a drive component, a rotating component, and a screw. The adjustment component is installed on the outer wall of the main pipe, and the drive component is installed at the bottom of the adjustment component. One end of the drive component abuts against the rotating component fixed at one end of the screw. The screw is movably installed on the outer wall of the main pipe, and the other end of the screw is threadedly connected to a screw seat fixed at the end of the telescopic pipe.

[0015] As a further technical solution of the present invention, the adjustment assembly includes a fixed base, an adjustment member and a first connecting member. The fixed base is installed on the outer wall of the main pipe. The fixed base has an adjustment groove for the adjustment member and the first connecting member to slide. The adjustment member is slidably installed on the fixed base and threadedly connected to the first connecting member. A drive assembly is installed on the first connecting member.

[0016] As a further technical solution of the present invention, the driving component includes a first driving member, a rotating shaft, a control member, and an elastic member. The first driving member is installed in a first connecting member. A rotating shaft is fixed on the output end of the first driving member. A control member that cooperates with the rotating member is fixed on one end of the rotating shaft. An elastic member is also fitted on the rotating shaft. The two ends of the elastic member are in contact with the outer wall of the first driving member and the inner wall of the control member, respectively.

[0017] As a further technical solution of the present invention, the control component is an arc-shaped structure, the rotating component is a frustum structure, and one end of the arc-shaped protrusion on the control component is always in contact with the rotating component through an elastic component.

[0018] As a further technical solution of the present invention, the adjustment groove is an arc-shaped groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The second driving component drives the mounting shaft to rotate via the transmission module. The mounting shaft simultaneously drives the coupling and the first gear to rotate. The first gear drives the grouting pipe to rotate via the second gear. The grouting pipe drives the grouting disc to rotate. The coupling drives the worm gear to rotate. The worm gear drives the rotating component to rotate via the worm wheel. Since the length of the deflecting component is greater than the length of the rotating component, the rotating component drives the deflecting component to reciprocate via the second connecting component. The deflecting component drives the third gear to reciprocate. The third gear drives the grouting pipe to reciprocate on the telescopic pipe via its teeth. The grouting pipe drives the grouting disc to reciprocate. Since the grout sprayed from the grouting disc through the spray hole has a certain impact force, and the grouting disc, through rotation and reciprocating movement, can simultaneously inject grout into the grouting hole of the karst cave and reciprocate to impact the inner wall of the grouting hole. This achieves wall solidification of the grouting hole, ensuring that the hardened grout can meet the required bearing capacity, guaranteeing the tunnel construction progress and quality, and improving the efficiency of tunnel construction.

[0021] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the sealing device for tunnel karst caves provided in an embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the structure in the inclined direction.

[0024] Figure 3 for Figure 1 A structural side view.

[0025] Figure 4 for Figure 1 Enlarged view of the grouting pipe and control mechanism.

[0026] Figure 5 for Figure 3 Enlarged view of the grouting pipe and control mechanism.

[0027] Figure 6 for Figure 1 Enlarged view of the structure at point A in the middle.

[0028] Figure 7 for Figure 2 Enlarged view of the structure at point B.

[0029] Reference numerals: 1 - Conveying pipe, 2 - Connecting flange, 3 - Telescopic sleeve, 31 - Main connecting pipe, 32 - Telescopic pipe, 4 - Adjusting mechanism, 41 - Adjusting assembly, 411 - Fixed base, 412 - Adjusting component, 413 - First connecting component, 414 - Adjusting groove, 42 - Drive assembly, 421 - First drive component, 422 - Rotating shaft, 423 - Control component, 424 - Elastic component, 43 - Rotating component, 44 - Screw, 5 - Control mechanism, 51 - Rotating assembly 511 - Second driving component, 512 - Transmission module, 513 - Mounting shaft, 514 - First gear, 515 - Second gear, 516 - Mounting sleeve, 52 - Reciprocating assembly, 521 - Coupling, 522 - Worm gear, 523 - Worm wheel, 524 - Rotating component, 525 - Second connecting component, 526 - Deflecting component, 527 - Third gear, 528 - Gear tooth, 53 - Connecting seat, 6 - Grouting pipe, 61 - Keyway, 7 - Grouting disc, 71 - Grouting hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0032] like Figures 1 to 5 As shown, a sealing device for a tunnel karst cave provided as an embodiment of the present invention includes a delivery pipe 1. One end of the delivery pipe 1 is installed on the output end of a grouting pump. The other end of the delivery pipe 1 is connected to one end of a telescopic sleeve 3 via a connecting flange 2. The telescopic sleeve 3 includes a main pipe 31 and a telescopic pipe 32. One end of the main pipe 31 is connected to the connecting flange 2, and the telescopic pipe 32 is slidably installed on the other end of the main pipe 31. An adjustment mechanism 4 for adjusting the telescopic length of the telescopic pipe 32 is installed on the outer wall of the main pipe 31. A grouting pipe 6 is slidably installed on one end of the telescopic pipe 32. A grouting disc 7 is fixed to one end of the grouting pipe 6. The grouting disc 7 has grouting holes 71 distributed on it for spraying mud. The device also includes:

[0033] The control mechanism 5 includes a rotating component 51, a reciprocating component 52, and a connecting seat 53. The rotating component 51 is installed on the end wall of the telescopic pipe 32 near the grouting pipe 6. One end of the rotating component 51 is slidably connected to the outer wall of the grouting pipe 6, and the other end of the rotating component 51 is connected to the reciprocating component 52 installed on the connecting seat 53. The connecting seat 53 is fixed on the telescopic pipe 32.

[0034] The reciprocating assembly 52 includes a coupling 521, a worm 522, a worm wheel 523, a rotating component 524, a second connecting component 525, a deflecting component 526, a third gear 527, and gear teeth 528. One end of the coupling 521 is connected to the output end of the rotating assembly 51, and the other end of the coupling 521 is connected to the worm 522, which is movably mounted on the connecting seat 53. The worm 522 engages with the worm wheel 523, and the rotating component 524 is fixed on the worm wheel 523. One end of the rotating component 524 is movably connected to the deflecting component 526 through the second connecting component 525. The deflecting component 526 is fixed on the third gear 527, which is movably mounted on the connecting seat 53. One end of the third gear 527 meshes with gear teeth 528 distributed on the outer wall of the grouting pipe 6.

[0035] like Figure 4 and Figure 5As shown, in a preferred embodiment of the present invention, the rotating assembly 51 includes a second driving member 511, a transmission module 512, a mounting shaft 513, a first gear 514, a second gear 515, and a mounting sleeve 516. The second driving member 511 is fixed on the telescopic tube 32. The output end of the second driving member 511 is connected to one end of the mounting shaft 513 through the transmission module 512. The other end of the mounting shaft 513 extends into the mounting sleeve 516 and is connected to the first gear 514. The first gear 514 meshes with the second gear 515, which is fitted on the outer wall of the grouting pipe 6. Both the first gear 514 and the second gear 515 are installed in the mounting sleeve 516. The mounting sleeve 516 is fixed on the telescopic tube 32. One end of the mounting shaft 513 is also connected to the worm gear 522 through a coupling 521.

[0036] like Figure 4 and Figure 5 As shown, in a preferred embodiment of the present invention, the second gear 515 is a ring-shaped gear, and the inner wall of the second gear 515 is fitted with a key that cooperates with the keyway 61 opened on the outer wall of the grouting pipe 6.

[0037] In this embodiment, the second driving member 511 drives the mounting shaft 513 to rotate via the transmission module 512. The mounting shaft 513 simultaneously drives the coupling 521 and the first gear 514 to rotate. The first gear 514 drives the grouting pipe 6 to rotate via the second gear 515. The grouting pipe 6 drives the grouting disc 7 to rotate. The coupling 521 drives the worm gear 522 to rotate. The worm gear 522 drives the rotating member 524 to rotate via the worm wheel 523. Since the length of the deflecting member 526 is greater than the length of the rotating member 524, the rotating member 524 drives the deflecting member 526 to reciprocate through the second connecting member 525. The deflecting member 526 drives the third... Gear 527 reciprocates, and the third gear 527 drives the grouting pipe 6 to reciprocate on the telescopic pipe 32 through gear teeth 528. The grouting pipe 6 drives the grouting disc 7 to reciprocate. Since the grout sprayed by the grouting disc 7 through the grouting hole 71 has a certain impact force, and the grouting disc 7 can reciprocate to impact the inner wall of the grouting hole while grouting into the karst cave, it can solidify the wall of the grouting hole, ensure that the hardened grout can meet the required bearing capacity, ensure the construction progress and quality of the tunnel, and improve the efficiency of tunnel construction.

[0038] In a preferred embodiment, the second drive element 511 is preferably a servo motor;

[0039] The transmission module 512 preferably adopts a belt drive structure;

[0040] The rotating component 524, the second connecting component 525, and the deflecting component 526 are all preferably rod-shaped structures.

[0041] like Figure 6 and Figure 7 As shown, in a preferred embodiment of the present invention, the adjustment mechanism 4 includes an adjustment component 41, a drive component 42, a rotating component 43, and a screw 44. The adjustment component 41 is installed on the outer wall of the main pipe 31. The drive component 42 is installed at the bottom of the adjustment component 41. One end of the drive component 42 abuts against the rotating component 43 fixed at one end of the screw 44. The screw 44 is movably installed on the outer wall of the main pipe 31, and the other end of the screw 44 is threadedly connected to a screw seat fixed at the end of the telescopic pipe 32.

[0042] like Figure 6 and Figure 7 As shown, in a preferred embodiment of the present invention, the adjustment assembly 41 includes a fixed base 411, an adjustment member 412, and a first connecting member 413. The fixed base 411 is installed on the outer wall of the main pipe 31. The fixed base 411 has an adjustment groove 414 for sliding of the adjustment member 412 and the first connecting member 413. The adjustment member 412 is slidably installed on the fixed base 411 and threadedly connected to the first connecting member 413. A drive assembly 42 is installed on the first connecting member 413.

[0043] like Figure 6 and Figure 7 As shown, in a preferred embodiment of the present invention, the drive assembly 42 includes a first drive member 421, a rotating shaft 422, a control member 423, and an elastic member 424. The first drive member 421 is installed inside the first connector 413. The rotating shaft 422 is fixed on the output end of the first drive member 421. One end of the rotating shaft 422 is fixed with a control member 423 that cooperates with the rotating member 43. An elastic member 424 is also fitted on the rotating shaft 422. The two ends of the elastic member 424 are in contact with the outer wall of the first drive member 421 and the inner wall of the control member 423, respectively.

[0044] like Figure 6 and Figure 7 As shown, in a preferred embodiment of the present invention, the control member 423 is an arc-shaped structure, the rotating member 43 is a frustum structure, and one end of the arc-shaped protrusion on the control member 423 is always in contact with the rotating member 43 through the elastic member 424.

[0045] like Figure 6 and Figure 7 As shown, in a preferred embodiment of the present invention, the adjustment groove 414 is an arc-shaped groove.

[0046] In this embodiment, when it is necessary to adjust the position of the grouting pipe 6 in the grouting hole, the first driving member 421 drives the rotating shaft 422 to rotate, the rotating shaft 422 drives the control member 423 to rotate, the control member 423 drives the rotating member 43 to rotate by cooperating with the elastic member 424, the rotating member 43 drives the screw 44 to rotate, and the screw 44 drives the telescopic tube 32 to extend and retract by rotating, thereby changing the position of the grouting pipe 6 in the grouting hole, which facilitates the grouting treatment of the grouting hole by the grouting plate 7 and improves the working efficiency and practicality of the device;

[0047] When it is necessary to change the moving speed of the grouting pipe 6 in the grouting hole, the adjusting member 412 drives the first connecting member 413 to move along the adjusting groove 414. The first connecting member 413 drives the driving assembly 42 to move, changing the contact position between the controlling member 423 and the rotating member 43. Since the controlling member 423 is an arc-shaped structure, when the most protruding part of the arc-shaped part of the controlling member 423 contacts the rotating member 43 and the rotation speed of the first driving member 421 remains unchanged, the controlling member 423 drives the rotating member 43 to rotate at the fastest speed. When both ends of the arc-shaped part of the controlling member 423 contact the rotating member 43 and the rotation speed of the first driving member 421 remains unchanged, the controlling member 423 drives the rotating member 43 to rotate at the slowest speed. Therefore, by moving along the adjusting groove 414, the controlling member 423 can change the rotation speed of the screw 44, thereby changing the moving speed of the grouting pipe 6 in the grouting hole, meeting the needs of the device in actual use, and improving the practicality and convenience of the device.

[0048] In a preferred embodiment, the adjusting member 412 is preferably an adjusting bolt;

[0049] The first connector 413 preferably adopts a kit structure for fixing the first drive component 421;

[0050] The first driving component 421 preferably uses a servo motor;

[0051] The elastic element 424 is preferably a spring.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing device for a tunnel karst cave, comprising a delivery pipe, one end of which is installed on the output end of a grouting pump, and the other end of which is connected to one end of a telescopic sleeve via a connecting flange. The telescopic sleeve includes a main pipe and a telescopic pipe, one end of which is connected to the connecting flange, and the telescopic pipe is slidably mounted on the other end of the main pipe. An adjustment mechanism for adjusting the telescopic pipe's extension length is installed on the outer wall of the main pipe. A grouting pipe is slidably mounted on one end of the telescopic pipe, and a grouting disc is fixed to one end of the grouting pipe. The grouting disc has grouting holes distributed on it for spraying grout. The device is characterized in that... Also includes: The control mechanism includes a rotating component, a reciprocating component, and a connecting seat. The rotating component is installed on the end wall of the telescopic pipe near the grouting pipe. One end of the rotating component is slidably connected to the outer wall of the grouting pipe, and the other end of the rotating component is connected to the reciprocating component installed on the connecting seat. The connecting seat is fixed on the telescopic pipe. The reciprocating assembly includes a coupling, a worm gear, a worm wheel, a rotating component, a second connecting component, a deflecting component, a third gear, and gear teeth. One end of the coupling is connected to the output end of the rotating assembly, and the other end of the coupling is connected to the worm gear movably mounted on the connecting seat. The worm gear cooperates with the worm wheel, and a rotating component is fixed on the worm wheel. One end of the rotating component is movably connected to the deflecting component through the second connecting component. The deflecting component is fixed on the third gear, and the third gear is movably mounted on the connecting seat. One end of the third gear meshes with gear teeth distributed on the outer wall of the grouting pipe. The rotating component simultaneously drives the grouting pipe and the coupling to rotate. The grouting pipe drives the grouting disc to rotate, and the coupling drives the worm gear to rotate. The worm gear drives the rotating component to rotate through the worm wheel. Since the length of the deflecting component is greater than the length of the rotating component, the rotating component drives the deflecting component to reciprocate through the second connecting component. The deflecting component drives the third gear to reciprocate. The third gear drives the grouting pipe to reciprocate on the telescopic pipe through its teeth. The grouting pipe drives the grouting disc to reciprocate. The grouting disc simultaneously injects grout into the grouting hole of the karst cave and reciprocates to impact the inner wall of the grouting hole of the karst cave through rotation and reciprocating movement.

2. The sealing device for tunnel karst caves according to claim 1, characterized in that, The rotating assembly includes a second driving component, a transmission module, a mounting shaft, a first gear, a second gear, and a mounting sleeve. The second driving component is fixed on the telescopic tube. The output end of the second driving component is connected to one end of the mounting shaft through the transmission module. The other end of the mounting shaft extends into the mounting sleeve and is connected to the first gear. The first gear meshes with the second gear, which is fitted on the outer wall of the grouting pipe. Both the first gear and the second gear are installed in the mounting sleeve. The mounting sleeve is fixed on the telescopic tube. One end of the mounting shaft is also connected to a worm gear through a coupling.

3. The sealing device for tunnel karst caves according to claim 2, characterized in that, The second gear is a ring-shaped gear, and the inner wall of the second gear is fitted with a key that matches the keyway opened on the outer wall of the grouting pipe.

4. The sealing device for tunnel karst caves according to claim 1, characterized in that, The adjustment mechanism includes an adjustment component, a drive component, a rotating component, and a screw. The adjustment component is installed on the outer wall of the main pipe, and the drive component is installed at the bottom of the adjustment component. One end of the drive component abuts against the rotating component fixed to one end of the screw. The screw is movably installed on the outer wall of the main pipe, and the other end of the screw is threadedly connected to a screw seat fixed to the end of the telescopic pipe.

5. The sealing device for tunnel karst caves according to claim 4, characterized in that, The adjustment assembly includes a fixed base, an adjustment component, and a first connecting component. The fixed base is installed on the outer wall of the main pipe. The fixed base has an adjustment groove for the adjustment component and the first connecting component to slide. The adjustment component is slidably installed on the fixed base and threadedly connected to the first connecting component. A drive assembly is installed on the first connecting component.

6. The sealing device for tunnel karst caves according to claim 5, characterized in that, The drive assembly includes a first drive component, a rotating shaft, a control component, and an elastic component. The first drive component is installed inside a first connector. A rotating shaft is fixed to the output end of the first drive component. A control component that cooperates with the rotating component is fixed to one end of the rotating shaft. An elastic component is also fitted on the rotating shaft. The two ends of the elastic component are in contact with the outer wall of the first drive component and the inner wall of the control component, respectively.

7. The sealing device for tunnel karst caves according to claim 6, characterized in that, The control component is an arc-shaped structure, and the rotating component is a frustum structure. One end of the arc-shaped protrusion on the control component is always in contact with the rotating component through an elastic element.

8. The sealing device for tunnel karst caves according to claim 5, characterized in that, The adjustment groove is an arc-shaped groove.

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