Tunnel pre-drainage drilling protection device

Abstract

The invention provides a tunnel pre-drainage drilling protection device, and belongs to the technical field of tunnel construction equipment, the tunnel pre-drainage drilling protection device comprises a main pipeline used for connecting a pre-drainage hole water outlet, a drainage pipeline arranged on the main pipeline, a first valve body arranged on the drainage pipeline, and a second valve body arranged on the main pipeline; the main pipeline is connected to a water outlet of the pre-drainage hole after drilling of the pre-drainage hole is completed, the drainage pipeline is used for being connected with a hose, water flow is discharged to the outside through the hose, and a first valve body on the drainage pipeline is used for adjusting the drainage flow of the drainage pipeline; by means of the tunnel pre-drainage drilling protection device, the controllable valve body can be arranged at the water outlet of the pre-drainage hole in water-rich high-osmotic-pressure tunnel construction so as to adjust the flow of the pre-drainage hole, and the first valve body can be directly closed when necessary so as to temporarily close the pre-drainage hole.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel construction equipment, and more specifically relates to a tunnel pre-drainage drilling protection device. Background Art

[0002] Some tunnel construction uses advanced geological survey technology to detect geological information ahead of the construction site. For different types of groundwater, such as pore water in loose layers and bedrock fissure water, groundwater treatment is often required before tunnel construction can proceed. This treatment process typically involves drilling holes to drain the groundwater and then injecting grout to seal these seepage holes. These holes are tunnel pre-drainage holes.

[0003] Depending on the groundwater volume, some construction sites may need to drill multiple tunnel pre-drain holes simultaneously to increase drainage speed. Existing technology involves drilling pre-drain holes directly into the tunnel face, connecting the tunnel face to the groundwater volume. Once this hole is drilled, the groundwater flows directly outward through the pre-drain holes and is then discharged from the tunnel face.

[0004] However, the outward drainage of some pre-drainage holes will affect the work of drilling other pre-drainage holes, cause water accumulation in the working area of ​​the tunnel face, and affect construction efficiency. Summary of the Invention

[0005] Based on this, the object of the present invention is to provide a tunnel pre-drainage drilling protection device, which is used to set a controllable valve body at the outlet of the pre-drainage hole in the construction of a water-rich and high-osmotic pressure tunnel to adjust the flow rate of the pre-drainage hole; the protection device includes a main pipeline for connecting the outlet of the pre-drainage hole, a drainage pipeline arranged on the main pipeline, a first valve body arranged on the drainage pipeline, and a second valve body arranged on the main pipeline;

[0006] The main pipe is connected to the outlet of the pre-drainage hole after the pre-drainage hole is drilled. The drainage pipe is used to connect to a hose to discharge water to the outside through the hose. The first valve body on the drainage pipe is used to adjust the drainage flow of the drainage pipe; the second valve body is used to discharge the water in the main pipe when the main pipe is connected to the outlet of the drainage hole, thereby reducing the water pressure in the main pipe.

[0007] Preferably, the protective device further comprises a pre-buried pipe, the pre-buried pipe comprising a distal end extending into the interior of the construction surface and a proximal end outside the construction surface; the proximal end of the pre-buried pipe is provided with a proximal end connector, and the main pipe is provided with a distal end connector, the proximal end connector and the distal end connector being used to connect the main pipe to the proximal end of the pre-buried pipe;

[0008] The pre-embedded pipeline is fixed on the construction surface of the pre-drainage hole before drilling, and the main pipeline is connected to the proximal end of the pre-embedded pipeline after the pre-drainage hole is drilled, the second valve body is opened to fix the position of the main pipeline, and the second valve body is closed after the position of the main pipeline is fixed.

[0009] Preferably, the proximal end connector comprises a proximal end crossbar arranged outside the proximal end of the pre-embedded pipeline, and proximal end supports arranged at both ends of the proximal end crossbar; the proximal end supports are used to connect the proximal end crossbar and the pre-embedded pipeline.

[0010] The distal end connector comprises a buckling connector capable of being connected with the proximal end crossbar, and a ring-shaped connector sleeved outside the main pipeline and used to connect the buckling connector; the ring-shaped connector is used to connect the main pipeline and the buckling connector, and the buckling connector is capable of being detachably connected with the proximal end crossbar.

[0011] Preferably, the ring-shaped connector comprises a sleeving ring sleeved outside the main pipeline, and a clamping assembly connected with the sleeving ring; the clamping assembly comprises a fixed connecting plate connected with the sleeving ring, a movable connecting plate hinged with the fixed connecting plate, and a first elastic member arranged between the fixed connecting plate and the movable connecting plate.

[0012] The length direction of the fixed connecting plate and the movable connecting plate is parallel to the axial direction of the main pipeline; the fixed connecting plate is capable of being inserted into the gap between the proximal end crossbar and the outer wall of the pre-embedded pipeline; the movable connecting plate is capable of being connected with the proximal end crossbar; the connecting part of the movable connecting plate and the proximal end crossbar is provided with an outer side baffle and an inner side baffle; and the proximal end crossbar is capable of being clamped between the outer side baffle and the inner side baffle.

[0013] The first elastic member is capable of pushing the movable baffle to rotate around the hinge part, so as to keep the outer side baffle and the inner side baffle on both sides of the proximal end crossbar.

[0014] Preferably, the outer side baffle is provided with an inclined surface on the side away from the sleeving ring; the inclined surface is capable of pushing the movable connecting plate to rotate when being in contact with the proximal end crossbar; the connecting part of the movable connecting plate and the proximal end crossbar rotates away from the fixed connecting plate and compresses the first elastic member; when the proximal end crossbar moves to between the outer side baffle and the inner side baffle, the first elastic member is capable of pushing the connecting part of the movable connecting plate and the proximal end crossbar to rotate towards the fixed connecting plate, so that the proximal end crossbar is between the outer side baffle and the inner side baffle.

[0015] Preferably, the sleeving ring is connected with at least two clamping assemblies; the multiple clamping assemblies are uniformly arranged on the sleeving ring.

[0016] Preferably, the main pipeline is provided with a clamping plate at the end close to the pre-embedded pipeline; the clamping plate is provided with a protruding part and a recessed part in the circumferential direction; the protruding part is arranged on the side away from the main pipeline, and the recessed part is arranged between the protruding part and the main pipeline.

[0017] The main pipe and the sleeve ring can rotate and translate axially relative to each other; after the snap connector is connected to the proximal cross bar, the main pipe can be rotated to rotate the protrusion to the side of the proximal support, and then the main pipe can be pushed to translate axially to translate the main pipe in the direction close to the pre-buried pipe, and finally the main pipe is rotated again to rotate the protrusion to the rear side of the proximal support, and at the same time the recessed portion is on the side of the proximal support, thereby completing the fixation of the relative position of the main pipe and the pre-buried pipe.

[0018] Preferably, the sleeve ring is further provided with a limit assembly, the limit assembly comprising a limit bracket connected to the sleeve ring, a limit rod passing through the limit bracket, and a second elastic member provided between the limit rod and the limit bracket; a limit groove matching the limit rod is provided on the outer wall of the main pipe;

[0019] The axial direction of the limiting rod is parallel to the radial direction of the main pipe, and the second elastic member is used to push the limiting rod close to the outer wall of the main pipe; when the limiting rod is inserted into the limiting groove, the limiting rod can limit the relative rotation and movement between the sleeve ring and the main pipe.

[0020] Preferably, the main pipe includes a proximal end and a distal end, the proximal end of the main pipe is connected to the water outlet of the pre-drainage hole, and the second valve body is arranged at the distal end of the main pipe; the distal end of the main pipe is provided with a main pipe drainage hole;

[0021] The second valve body includes a water baffle disposed inside the distal end of the main pipe, a rotating shaft connected to the water baffle, the rotating shaft passing through the distal end of the main pipe, a waist-shaped protrusion disposed on the rotating shaft, and an external thread disposed on the end of the rotating shaft outside the main pipe; a rotating handle is sleeved on the waist-shaped protrusion, the rotating handle is provided with a waist-shaped hole matching the waist-shaped protrusion, a nut matching the external thread is connected to the external thread of the rotating shaft, and the nut is used to limit the position of the rotating handle;

[0022] A valve body drainage hole is provided on the water baffle, and the water baffle can be rotated by rotating the handle. When the valve body drainage hole on the water baffle is connected with the drainage hole of the main pipeline, the second valve body opens.

[0023] Preferably, a guide cone is provided on the water baffle, and the guide cone protrudes into a pointed end along the axis of the main pipe in the main pipe. The guide cone is used to guide the water flow in the main pipe to the drainage hole of the main pipe to prevent the water flow in the main pipe from impacting the far end of the main pipe; a sealing ring is provided between the rotating handle and the main pipe.

[0024] According to an embodiment of the present invention, a tunnel pre-drainage drilling protection device can set a controllable valve body at the outlet of the pre-drainage hole in the construction of a water-rich and high-permeability tunnel to adjust the flow of the pre-drainage hole. When necessary, the first valve body can be directly closed to temporarily close the pre-drainage hole; it can also divert the groundwater discharged from the pre-drainage hole through a drainage pipe to an area that does not affect the construction or collect it in a container. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The disclosure includes the drawings of the specification, which should be considered as included in the specification and forming a part thereof, and illustrating various exemplary embodiments, features and aspects of the present disclosure, and for the purpose of explanation of principles of the present disclosure. The present application will be more fully understood from the following detailed description, taken in conjunction with the accompanying drawings. In which:

[0026] Figure 1 is a schematic view of a tunnel pre-drainage drilling protection device according to an embodiment of the present application;

[0027] Figure 2 is a schematic view of a ring-shaped connecting piece of a tunnel pre-drainage drilling protection device according to an embodiment of the present application;

[0028] Figure 3 is a sectional view of a tunnel pre-drainage drilling protection device connected by a ring-shaped connecting piece according to an embodiment of the present application;

[0029] Figure 4 is a schematic view of the internal structure of a main pipe of a tunnel pre-drainage drilling protection device according to an embodiment of the present application;

[0030] Figure 5 is a schematic view of the internal structure of a tunnel pre-drainage drilling protection device according to an embodiment of the present application;

[0031] Figure 6 is Figure 5 is a local enlarged view of A in FIG. 1;

[0032] Figure 7 is Figure 5 is a local enlarged view of B in FIG. 1;

[0033] Figure 8 is Figure 5 is a local enlarged view of C in FIG. 1;

[0034] Wherein: main pipe 10, drainage pipe 11, first valve body 12, pre-embedded pipe 20, proximal end cross bar 21, proximal end support 22, sleeve joint ring 23, fixed connecting plate 24, movable connecting plate 25, first elastic member 26, outer baffle 27, inner baffle 28, clamping plate 30, protruding part 31, recessed part 32, limiting support 33, limiting rod 34, second elastic member 35, water baffle 41, waist-shaped protruding part 42, rotating handle 43, flow guide cone 44. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be further described in detail below by embodiments, and in conjunction with the drawings, but the present application is not limited to the following embodiments.

[0036] In some tunnel construction, advanced geological exploration technology is used to detect geological information in front of the construction face. For some different types of groundwater, such as loose layer pore water and bedrock fissure water, it is usually necessary to treat the groundwater before continuing tunnel construction. The process of treating groundwater is usually to drill holes to drain the groundwater and then inject grouting to seal these seepage gaps. The holes drilled are tunnel pre-drainage holes. Depending on the size of the groundwater capacity, in order to increase the drainage speed, some construction sites may need to drill multiple tunnel pre-drainage holes for simultaneous drainage. According to existing technologies, tunnel pre-drainage holes are drilled directly on the face from the outside to the inside. After the groundwater space is opened, the groundwater flows directly outward through the pre-drainage holes, and the groundwater is discharged from the face.

[0037] However, the outward drainage of some pre-drainage holes will affect the work of drilling other pre-drainage holes, cause water accumulation in the working area of ​​the tunnel face, and affect construction efficiency.

[0038] To address the above-mentioned problems, the present invention aims to provide a tunnel pre-drainage borehole protection device, which is used to set a controllable valve body at the outlet of a pre-drainage hole in a water-rich, high-osmotic-pressure tunnel to regulate the flow rate of the pre-drainage hole. The protection device includes a main pipe 10 for connecting the outlet of the pre-drainage hole, a drainage pipe 11 provided on the main pipe 10, a first valve body 12 provided on the drainage pipe 11, and a second valve body provided on the main pipe 10.

[0039] The main pipe 10 is connected to the outlet of the pre-drainage hole after the pre-drainage hole is drilled. The drainage pipe 11 is used to connect to a hose to discharge water to the outside through the hose. The first valve body 12 on the drainage pipe 11 is used to adjust the drainage flow of the drainage pipe 11; the second valve body is used to discharge the water in the main pipe 10 when the main pipe 10 is connected to the outlet of the drainage hole, thereby reducing the water pressure in the main pipe 10.

[0040] In this embodiment, Figure 1 、 Figure 2 as well as Figure 3 As shown, the main pipe 10 is a circular pipe having a proximal end and a distal end. The proximal end of the main pipe 10 is connected to the outlet of a pre-drainage hole on the tunnel face. The connection between the main pipe 10 and the pre-drainage hole can be achieved by pre-embedded equipment that is placed into the pre-drainage hole before drilling. The pre-embedded equipment is then fixed to the tunnel face using concrete.

[0041] The drainage pipe 11 is used to output the groundwater flowing into the main pipe 10 to the outside. One end of the drainage pipe 11 is connected to the main pipe 10, and a joint can be provided at the other end. The joint can be used to quickly connect a hose, which can guide the groundwater to other spaces that do not affect construction or to other containers.

[0042] The first valve body 12 may be a ball valve. Closing the first valve body 12 may close the channel for the drainage pipe 11 to drain water outwards before the drainage pipe 11 is connected to other hoses.

[0043] In some embodiments, a drain outlet is further provided at the distal end of the main pipe 10, and the second valve body is used to open or close the drain outlet at the distal end of the main pipe 10. After the pre-drain hole is drilled, the main pipe 10 is connected to the outlet of the pre-drain hole. The second valve body is used to drain the water in the main pipe 10 when the main pipe 10 is connected to the outlet of the drain hole, thereby reducing the water pressure in the main pipe 10.

[0044] Furthermore, the protective device further includes a pre-buried pipe 20, the pre-buried pipe 20 including a distal end extending into the interior of the construction surface and a proximal end outside the construction surface; a proximal end connector is provided at the proximal end of the pre-buried pipe 20, and a distal end connector is provided on the main pipe 10, and the proximal end connector and the distal end connector are used to connect the main pipe 10 to the proximal end of the pre-buried pipe 20;

[0045] The embedded pipe 20 is fixed on the construction surface of the pre-drainage hole before the pre-drainage hole is drilled. After the pre-drainage hole is drilled, the main pipe 10 is connected to the proximal end of the embedded pipe 20, and the second valve body is opened to fix the position of the main pipe 10. After the position of the main pipe 10 is fixed, the second valve body is closed.

[0046] In this embodiment, the pre-buried pipe 20 is a round pipe, the distal end of the pre-buried pipe 20 extends into the tunnel face, the proximal end of the pre-buried pipe 20 is outside the tunnel face, and a portion of the pre-buried pipe 20 protrudes outside the tunnel face.

[0047] The embedded pipe 20 is fixed on the construction surface of the pre-drainage hole before the pre-drainage hole is drilled. The embedded pipe 20 can be placed into the tunnel face after drilling and then fixed with concrete. A pre-drainage hole is drilled in the center area of ​​the embedded pipe 20. After drilling, the main pipe 10 is connected to the proximal end of the embedded pipe 20, and the second valve body is opened to fix the position of the main pipe 10. After the position of the main pipe 10 is fixed, the second valve body is closed.

[0048] In some embodiments, the proximal connector and the distal connector can be connectors such as snaps and latches.

[0049] Furthermore, the proximal connecting member includes a proximal cross bar 21 provided on the proximal outer side of the pre-buried pipe 20, and proximal supports 22 provided at both ends of the proximal cross bar 21; the proximal supports 22 are used to connect the proximal cross bar 21 and the pre-buried pipe 20;

[0050] The distal connector includes a snap-on connector that can be connected to the proximal cross bar 21 and an annular connector that is sleeved on the outside of the main pipe 10 for connecting to the snap-on connector; the annular connector is used to connect the main pipe 10 and the snap-on connector, and the snap-on connector can be detachably connected to the proximal cross bar 21.

[0051] This embodiment provides a specific form of a proximal connecting member and a distal connecting member. The proximal cross bar 21 is a round bar, and the proximal support 22 can be a plate-shaped part. The proximal support 22 connects the proximal cross bar 21 to the outside of the embedded pipe 20.

[0052] The annular connector can be a clamp that can be movably connected to the outside of the main pipe 10. The snap-fit ​​connector is a snap-fit ​​structure that can be connected to the proximal cross bar 21. The snap-fit ​​connector can be detachably connected to the proximal cross bar 21.

[0053] Furthermore, the annular connector includes a sleeve ring 23 sleeved on the outside of the main pipe 10, a clamping assembly connected to the sleeve ring 23, and the clamping assembly includes a fixed connecting plate 24 connected to the sleeve ring 23, a movable connecting plate 25 hinged to the fixed connecting plate 24, and a first elastic member 26 provided between the fixed connecting plate 24 and the movable connecting plate 25;

[0054] The length directions of the fixed connecting plate 24 and the movable connecting plate 25 are parallel to the axial direction of the main pipe 10; the fixed connecting plate 24 can be inserted into the gap between the proximal cross bar 21 and the outer wall of the embedded pipe 20; the movable connecting plate 25 can be connected to the proximal cross bar 21, and the connecting portion of the movable connecting plate 25 and the proximal cross bar 21 is provided with an outer baffle 27 and an inner baffle 28, and the proximal cross bar 21 can be clamped between the outer baffle 27 and the inner baffle 28;

[0055] The first elastic member 26 can push the movable baffle to rotate around the hinge portion, thereby keeping the outer baffle 27 and the inner baffle 28 on both sides of the proximal cross bar 21 .

[0056] In this embodiment, Figure 4 As shown, the sleeve ring 23 is a circular ring part that can be sleeved on the outside of the main pipe 10. The fixed connecting plate 24 is connected to the sleeve ring 23, is arranged on one side of the sleeve ring 23, and extends toward the proximal connecting piece.

[0057] like Figure 3 、 Figure 4 As shown, the movable connecting plate 25 is hingedly connected to the fixed connecting plate 24. A first elastic member 26 is provided on one side of the hinge, and an outer baffle 27 and an inner baffle 28 are provided on the other side of the hinge. The first elastic member 26 may be a compression spring. The fixed connecting plate 24 and the movable connecting plate 25 are provided with small protrusions for connecting to the compression springs. The ends of the compression springs are sleeved outside the small protrusions to limit the position of the compression springs.

[0058] The outer baffle 27 and the inner baffle 28 are arranged on the movable connecting plate 25 and extend toward the embedded pipe 20 . The movable connecting plate 25 , the fixed connecting plate 24 , the outer baffle 27 and the inner baffle 28 can surround the proximal cross bar 21 .

[0059] Figure 2 and Figure 3 The diagram shows the state where the snap-fit ​​assembly is connected to the proximal crossbar 21. After drainage is complete, the main pipe 10 can be removed and recycled. To do this, the movable connecting plate 25 is pressed to set the end of the first elastic member 26, compressing the first elastic member 26 and causing the outer baffle 27 and the inner baffle 28 to separate from the proximal crossbar 21. At this point, the main pipe 10 can be separated from the pre-buried pipe 20.

[0060] Furthermore, the outer baffle 27 is provided with an inclined surface on the side away from the sleeve ring 23. The inclined surface can push the movable connecting plate 25 to rotate when it contacts the proximal cross bar 21, and the connection part between the movable connecting plate 25 and the proximal cross bar 21 rotates in the direction away from the fixed connecting plate 24 and compresses the first elastic member 26; when the proximal cross bar 21 moves between the outer baffle 27 and the inner baffle 28, the first elastic member 26 can push the connection part between the movable connecting plate 25 and the proximal cross bar 21 to rotate in the direction close to the fixed connecting plate 24, and the proximal cross bar 21 is between the outer baffle 27 and the inner baffle 28.

[0061] In this embodiment, the inclined surface is used to quickly connect the snap assembly to the proximal cross bar 21, pushing the sleeve ring 23 toward the embedded pipe 20. The inclined surface contacts the embedded pipe 20, and the sleeve ring 23 is further pushed. Under the guidance of the inclined surface, the connection between the movable connecting plate 25 and the proximal cross bar 21 can be rotated in a direction away from the fixed connecting plate 24, and the first elastic member 26 is compressed. When the proximal cross bar 21 moves between the outer baffle 27 and the inner baffle 28, the first elastic member 26 can push the connection between the movable connecting plate 25 and the proximal cross bar 21 to rotate toward the fixed connecting plate 24. The proximal cross bar 21 is between the outer baffle 27 and the inner baffle 28, and finally the snap assembly and the proximal cross bar 21 are quickly connected.

[0062] Furthermore, at least two engaging components are connected to the sleeve ring 23 , and a plurality of engaging components are evenly spaced and arranged on the sleeve ring 23 .

[0063] In this embodiment, Figure 3 、 Figure 5 As shown, multiple snap-fit ​​components are provided on the sleeve ring 23 to balance the contact force between the main pipe 10 and the pre-buried pipe 20 . In this embodiment, two snap-fit ​​components are provided, which are symmetrically arranged in the circumferential direction of the sleeve ring 23 .

[0064] In some embodiments, a plurality of engaging components may be provided on the sleeve ring 23 , for example, three engaging components or four engaging components, and the angles of the plurality of engaging components are evenly distributed in the circumferential direction of the sleeve ring 23 .

[0065] Furthermore, a clamping plate 30 is provided at one end of the main pipe 10 close to the pre-buried pipe 20. The clamping plate 30 is provided with a protrusion 31 and a recess 32 in the circumferential direction. The protrusion 31 is provided on the side away from the main pipe 10, and the recess 32 is provided between the protrusion 31 and the main pipe 10.

[0066] The main pipe 10 and the sleeve ring 23 can rotate and translate axially relative to each other; after the snap-fit ​​connector is connected to the proximal cross bar 21, the main pipe 10 can be rotated to rotate the protrusion 31 to the side of the proximal support 22, and then the main pipe 10 can be pushed to translate axially to translate the main pipe 10 in the direction close to the pre-buried pipe 20. Finally, the main pipe 10 is rotated again to rotate the protrusion 31 to the rear side of the proximal support 22, and at the same time, the recessed portion 32 is on the side of the proximal support 22, completing the fixation of the relative position of the main pipe 10 and the pre-buried pipe 20.

[0067] In this embodiment, Figure 3 、 Figure 4 As shown, Figure 3 as well as Figure 4 The state in which the snap plate 30 is not yet connected to the proximal support 22 is shown. Figure 5 The state where the engaging plate 30 is engaged with the proximal support 22 is shown.

[0068] The main pipe 10 and the sleeve ring 23 can rotate and translate axially relative to each other; in the specific implementation process, the snap-fit ​​connector is first connected to the proximal cross bar 21, and then the main pipe 10 is rotated to rotate the protrusion 31 to the side of the proximal support 22, and then the main pipe 10 is pushed to translate axially so that the main pipe 10 translates in the direction close to the pre-buried pipe 20, and finally, the main pipe 10 is rotated again to rotate the protrusion 31 to the rear side of the proximal support 22, and at the same time, the recessed portion 32 is on the side of the proximal support 22, completing the fixation of the relative position of the main pipe 10 and the pre-buried pipe 20.

[0069] The impact force of the water flow pushes the main pipe 10 away from the pre-buried pipe 20 , and the protrusion 31 is in close contact with the rear side of the proximal support 22 to provide a pulling force to support the main pipe 10 .

[0070] The sleeve ring 23 is provided on the front side of the proximal support 22 , and the rear side of the proximal support 22 is the side opposite to the front side.

[0071] Furthermore, a limit assembly is provided on the sleeve ring 23, which includes a limit bracket 33 connected to the sleeve ring 23, a limit rod 34 passing through the limit bracket 33, and a second elastic member 35 provided between the limit rod 34 and the limit bracket 33; a limit groove matching the limit rod 34 is provided on the outer wall of the main pipe 10;

[0072] The axial direction of the limiting rod 34 is parallel to the radial direction of the main pipe 10, and the second elastic member 35 is used to push the limiting rod 34 close to the outer wall of the main pipe 10; when the limiting rod 34 is inserted into the limiting groove, the limiting rod 34 can limit the relative rotation and movement between the sleeve ring 23 and the main pipe 10.

[0073] In this embodiment, the limiting assembly is used to maintain the relative position of the sleeve ring 23 and the main pipe 10 before the clamping plate 30 is connected to the proximal support 22 .

[0074] like Figure 5 、 Figure 7 As shown, the limiting rod 34 is provided with a step, and the second elastic member 35 can be a compression spring. The second elastic member 35 is arranged between the step of the limiting rod 34 and the limiting bracket 33, and is used to push the limiting rod 34 toward the outer wall of the main pipe 10. When the limiting rod 34 is inserted into the limiting groove, the limiting rod 34 can limit the relative rotation and movement between the sleeve ring 23 and the main pipe 10. The connection between the limiting rod 34 and the limiting groove is an arc-shaped groove, and the limiting groove is a circular arc groove. Using a large force to rotate or move the main pipe 10 can compress the second elastic member 35, causing the limiting rod 34 to disengage from the limiting groove, thereby releasing the limiting assembly from restricting the main pipe 10 and the sleeve ring 23.

[0075] Furthermore, the main pipe 10 includes a proximal end and a distal end. The proximal end of the main pipe 10 is connected to the water outlet of the pre-drainage hole, and the second valve body is arranged at the distal end of the main pipe 10. The distal end of the main pipe 10 is provided with a main pipe 10 drainage hole.

[0076] The second valve body includes a water baffle 41 disposed inside the distal end of the main pipe 10, a rotating shaft connected to the water baffle 41, the rotating shaft passing through the distal end of the main pipe 10, a waist-shaped protrusion 42 provided on the rotating shaft, and an external thread provided on the end of the rotating shaft outside the main pipe 10; a rotating handle 43 is sleeved on the waist-shaped protrusion 42, the rotating handle 43 is provided with a waist-shaped hole matching the waist-shaped protrusion 42, and a nut matching the external thread is connected to the external thread of the rotating shaft, and the nut is used to limit the position of the rotating handle 43;

[0077] The water baffle 41 is provided with a valve body drainage hole. The water baffle 41 can be rotated by rotating the handle 43. When the valve body drainage hole on the water baffle 41 is connected with the drainage hole of the main pipeline 10, the second valve body is opened.

[0078] In this embodiment, Figure 5 、 Figure 8 As shown, the waist-shaped protrusion 42 and the waist-shaped hole cooperate with each other to transmit torque. The water baffle 41 can be rotated by operating the rotating handle 43. When the valve body drain hole on the water baffle 41 is connected with the drain hole of the main pipe 10, the second valve body opens; when the valve body drain hole on the water baffle 41 is misaligned with the drain hole of the main pipe 10, the second valve body closes.

[0079] Furthermore, a guide cone 44 is provided on the water baffle 41. The guide cone 44 protrudes into a pointed end along the axis of the main pipe 10 in the main pipe 10. The guide cone 44 is used to guide the water flow in the main pipe 10 to the drainage hole of the main pipe 10 to prevent the water flow in the main pipe 10 from impacting the far end of the main pipe 10; a sealing ring is provided between the rotating handle 43 and the main pipe 10.

[0080] In this embodiment, the guide cone 44 is used to reduce the impact of water flow on the inner wall of the distal end of the main pipe 10. The sealing ring is used to prevent water leakage.

[0081] The various embodiments disclosed in the present invention have been described above. The above description is exemplary and not exhaustive, and the scope of the present invention is not limited to the above embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the spirit and scope of the present invention. That is to say, those skilled in the art can make various changes and improvements to the present invention in form and detail, and these are all considered to fall within the scope of protection of the present invention. The choice of terms used in this article is intended to best explain the principles of the various embodiments, practical applications or improvements to the technology in the market, or to enable those skilled in the art to understand the various embodiments disclosed herein.

Claims

1. A tunnel pre-drainage drilling protection device, used to set a controllable valve body at the outlet of the pre-drainage hole in the construction of a water-rich and high-osmotic pressure tunnel to adjust the flow rate of the pre-drainage hole; characterized by: The protective device comprises a main pipe (10) for connecting to the water outlet of the pre-drainage hole, a drainage pipe (11) arranged on the main pipe (10), a first valve body (12) arranged on the drainage pipe (11), and a second valve body arranged on the main pipe (10); The main pipe (10) is connected to the water outlet of the pre-drainage hole after the pre-drainage hole is drilled. The drainage pipe (11) is used to connect to a hose to discharge water to the outside through the hose. The first valve body (12) on the drainage pipe (11) is used to adjust the drainage flow of the drainage pipe (11); the second valve body is used to discharge the water in the main pipe (10) when the main pipe (10) is connected to the water outlet of the drainage hole, thereby reducing the water pressure in the main pipe (10).

2. A tunnel pre-drainage drilling protection device according to claim 1, characterized in that: The protective device further comprises a pre-buried pipe (20), wherein the pre-buried pipe (20) comprises a distal end extending into the interior of the construction surface and a proximal end outside the construction surface; a proximal end connector is provided at the proximal end of the pre-buried pipe (20), and a distal end connector is provided on the main pipe (10), wherein the proximal end connector and the distal end connector are used to connect the main pipe (10) to the proximal end of the pre-buried pipe (20); The pre-buried pipe (20) is fixed on the construction surface of the pre-drainage hole before the pre-drainage hole is drilled. After the pre-drainage hole is drilled, the main pipe (10) is connected to the proximal end of the pre-buried pipe (20). The second valve body is opened to fix the position of the main pipe (10). After the position of the main pipe (10) is fixed, the second valve body is closed.

3. The tunnel pre-drainage drilling protection device according to claim 2, characterized in that: The proximal connecting member comprises a proximal cross bar (21) arranged outside the proximal end of the pre-buried pipe (20), and proximal supports (22) arranged at both ends of the proximal cross bar (21); the proximal supports (22) are used to connect the proximal cross bar (21) and the pre-buried pipe (20); The distal connector comprises a snap-fit ​​connector capable of being connected to the proximal cross bar (21), and an annular connector sleeved on the outside of the main pipe (10) for connecting to the snap-fit ​​connector; the annular connector is used to connect the main pipe (10) and the snap-fit ​​connector, and the snap-fit ​​connector can be detachably connected to the proximal cross bar (21).

4. The tunnel pre-drainage drilling protection device according to claim 3, characterized in that: The annular connector comprises a sleeve ring (23) sleeved on the outside of the main pipe (10), a clamping assembly connected to the sleeve ring (23), the clamping assembly comprising a fixed connecting plate (24) connected to the sleeve ring (23), a movable connecting plate (25) hinged to the fixed connecting plate (24), and a first elastic member (26) arranged between the fixed connecting plate (24) and the movable connecting plate (25); The length directions of the fixed connecting plate (24) and the movable connecting plate (25) are parallel to the axial direction of the main pipe (10); the fixed connecting plate (24) can be inserted into the gap between the proximal cross bar (21) and the outer wall of the pre-buried pipe (20); the movable connecting plate (25) can be connected to the proximal cross bar (21), and the connecting portion between the movable connecting plate (25) and the proximal cross bar (21) is provided with an outer baffle (27) and an inner baffle (28), and the proximal cross bar (21) can be clamped between the outer baffle (27) and the inner baffle (28); The first elastic member (26) can push the movable baffle to rotate around the hinge portion, thereby keeping the outer baffle (27) and the inner baffle (28) on both sides of the proximal cross bar (21).

5. The tunnel pre-drainage drilling protection device according to claim 4, characterized in that: The outer baffle (27) is provided with an inclined surface on the side away from the sleeve ring (23). The inclined surface can push the movable connecting plate (25) to rotate when it contacts the proximal cross bar (21), and the connection part between the movable connecting plate (25) and the proximal cross bar (21) rotates in a direction away from the fixed connecting plate (24) and compresses the first elastic member (26); when the proximal cross bar (21) moves between the outer baffle (27) and the inner baffle (28), the first elastic member (26) can push the connection part between the movable connecting plate (25) and the proximal cross bar (21) to rotate in a direction close to the fixed connecting plate (24), and the proximal cross bar (21) is between the outer baffle (27) and the inner baffle (28).

6. The tunnel pre-drainage drilling protection device according to claim 3, characterized in that: At least two engaging components are connected to the sleeve ring (23), and a plurality of engaging components are evenly spaced and arranged on the sleeve ring (23).

7. The tunnel pre-drainage drilling protection device according to claim 6, characterized in that: A clamping plate (30) is provided at one end of the main pipe (10) close to the pre-buried pipe (20), and the clamping plate (30) is provided with a protruding portion (31) and a recessed portion (32) in a circumferential direction, wherein the protruding portion (31) is provided on a side away from the main pipe (10), and the recessed portion (32) is provided between the protruding portion (31) and the main pipe (10); The main pipe (10) and the sleeve ring (23) can rotate relative to each other and move axially. After the snap-fit ​​connector is connected to the proximal cross bar (21), the main pipe (10) can be rotated to rotate the protruding portion (31) to the side of the proximal support (22), and then the main pipe (10) is pushed to move axially to move the main pipe (10) toward the pre-buried pipe (20). Finally, the main pipe (10) is rotated again to rotate the protruding portion (31) to the rear side of the proximal support (22), and at the same time, the recessed portion (32) is on the side of the proximal support (22), thereby completing the fixation of the relative positions of the main pipe (10) and the pre-buried pipe (20).

8. The tunnel pre-drainage drilling protection device according to claim 7, characterized in that: A limiting assembly is also provided on the sleeve ring (23), and the limiting assembly includes a limiting bracket (33) connected to the sleeve ring (23), a limiting rod (34) passing through the limiting bracket (33), and a second elastic member (35) provided between the limiting rod (34) and the limiting bracket (33); and a limiting groove matching the limiting rod (34) is provided on the outer wall of the main pipe (10); The axial direction of the limiting rod (34) is parallel to the radial direction of the main pipe (10), and the second elastic member (35) is used to push the limiting rod (34) close to the outer wall of the main pipe (10); when the limiting rod (34) is inserted into the limiting groove, the limiting rod (34) can limit the relative rotation and movement between the sleeve ring (23) and the main pipe (10).

9. The tunnel pre-drainage drilling protection device according to claim 1, characterized in that: The main pipe (10) comprises a proximal end and a distal end, the proximal end of the main pipe (10) is connected to the water outlet of the pre-drainage hole, and the second valve body is arranged at the distal end of the main pipe (10); the distal end of the main pipe (10) is provided with a main pipe (10) drainage hole; The second valve body comprises a water baffle (41) arranged inside the distal end of the main pipe (10), a rotating shaft connected to the water baffle (41), the rotating shaft passing through the distal end of the main pipe (10), a waist-shaped protrusion (42) provided on the rotating shaft, and an external thread provided on the end of the rotating shaft outside the main pipe (10); a rotating handle (43) is sleeved on the waist-shaped protrusion (42), the rotating handle (43) is provided with a waist-shaped hole matching the waist-shaped protrusion (42), a nut matching the external thread is connected to the external thread of the rotating shaft, and the nut is used to limit the position of the rotating handle (43); The water baffle (41) is provided with a valve body drainage hole. The water baffle (41) can be rotated by rotating the handle (43). When the valve body drainage hole on the water baffle (41) is connected with the drainage hole of the main pipeline (10), the second valve body is opened.

10. The tunnel pre-drainage drilling protection device according to claim 9, characterized in that: The water baffle (41) is provided with a guide cone (44), which protrudes from the main pipe (10) along the axis of the main pipe (10) to form a pointed end. The guide cone (44) is used to guide the water flow in the main pipe (10) to the drainage hole of the main pipe (10) to prevent the water flow in the main pipe (10) from impacting the far end of the main pipe (10); and a sealing ring is provided between the rotating handle (43) and the main pipe (10).

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