Tunnel broken surrounding rock center deep ditch blasting construction tool

Abstract

The application belongs to the technical field of tunnel engineering construction, and particularly relates to a tunnel broken surrounding rock center deep buried ditch blasting construction tool, which comprises the following parts: a negative pressure suction part, which can be sleeved at the top end of a PVC pipe and forms a hole negative pressure suction channel with the PVC pipe; a cutting part, which has an unfolded state and a folded state, and can pass through the PVC pipe when the cutting part is in the folded state, and can be supported at the bottom of the PVC pipe when the cutting part is in the unfolded state; a force storage connecting part, one end of which is connected with the cutting part; a guide part, which is arranged at the top of the negative pressure suction part, and the cutting part is connected with the guide part; an operating rod, which is arranged at the center of the negative pressure suction part, the other end of the force storage connecting part is sleeved on the operating rod, and the operating rod can drive the cutting part to rotate; the force storage connecting part and the operating rod can slide relative to each other in the axial direction, and the guide part is sleeved on the operating rod. The application can clean the hole slag in the blast hole when the PVC pipe is inserted, facilitates the insertion of the PVC pipe, and solves the problem that the insertion of the PVC pipe is inconvenient in the prior art.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering construction technology; specifically, this invention relates to a blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels. Background Technology

[0002] In tunnel construction in cold regions, to prevent frost heave damage caused by groundwater freezing, reduce the impact of freeze-thaw cycles on tunnel structural stability, and ensure the continuous effectiveness of the drainage system, a central deep-buried water ditch is often arranged below the frost-resistant soil layer under the tunnel foundation for installing concrete drainage pipes.

[0003] For the excavation of the central buried water ditch, the current construction site adopts the vertical drilling and blasting method. The design adopts a single-arm rock drilling rig with a large-diameter drill bit for drilling, a medium-diameter PVC pipe for protection holes, and a small-diameter explosive cartridge for intermittent charging and blasting. This method can greatly improve the drilling efficiency, effectively avoid the problem of explosive cartridges not being able to enter the hole smoothly due to the collapse of the blast hole, reduce the over-excavation and under-excavation of the deep buried central water ditch, and reduce the physical harm of high concentration dust to construction workers.

[0004] However, during construction, loose gravel and debris remaining on the borehole wall and bottom can cause blockage of the borehole, hindering the insertion of PVC pipes and preventing them from reaching the bottom. This results in the PVC pipes not being able to be inserted to the specified depth, and the subsequent insertion depth of small-diameter explosive tubes will also not meet the standard. Therefore, it is necessary to treat the gravel and debris remaining on the borehole wall and bottom. Summary of the Invention

[0005] In view of this, the present invention provides a blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0006] To achieve the aforementioned objective, the present invention provides a blasting construction tool for deep buried water trenches in the center of fractured surrounding rock in tunnels, comprising: a negative pressure suction unit, which can be sleeved on the top of a PVC pipe to form a negative pressure suction channel inside the hole with the PVC pipe, thereby extracting the slag from the hole;

[0007] The cutting part has an extended state and a retracted state. When the cutting part is in the retracted state, it can pass through the PVC pipe, and when the cutting part is in the extended state, it can be supported at the bottom of the PVC pipe.

[0008] The energy-saving connecting part is connected to the cutting part at one end, and can provide radial elastic force to the cutting part when the cutting part is unfolded.

[0009] A guide section is located at the top of the negative pressure suction section. The cutting section is connected to the guide section. The guide section can control the cutting section to retract by moving upward.

[0010] The operation rod is arranged in the center of the negative pressure suction part, the other end of the force storage connecting part is sleeved on the operation rod, and the force storage connecting part and the operation rod are relatively fixed in the circumferential direction, and the operation rod can drive the cutting part to rotate.

[0011] The force storage connecting part and the operation rod can relatively slide in the axial direction, the guide part is sleeved on the operation rod, and the operation rod can drive the guide part to displace upward.

[0012] In the tunnel broken surrounding rock center deep buried ditch blasting construction tool, the negative pressure suction part comprises:

[0013] The L-shaped pipe is sleeved on the top of the PVC pipe, the opening of the horizontal section is provided with a negative pressure suction pipe joint, the L-shaped pipe can form a hole negative pressure suction channel with the PVC pipe, and the top surface of the joint of the vertical section and the horizontal section of the L-shaped pipe is a slope.

[0014] The extension pipe is fixedly arranged on the top of the L-shaped pipe and is aligned with the center of the vertical section of the L-shaped pipe, and the guide part is arranged in the extension pipe and can slide with the extension pipe in the axial direction.

[0015] The top end of the operation rod penetrates the top of the extension pipe and extends to the outside of the extension pipe.

[0016] In the tunnel broken surrounding rock center deep buried ditch blasting construction tool, the cutting part comprises:

[0017] The three saw blades are uniformly distributed on the bottom of the PVC pipe in the circumferential direction and can be switched between the unfolded state and the folded state through inward and outward displacement in the radial direction of the PVC pipe, the top surfaces of the three saw blades can be supported on the bottom of the PVC pipe when the three saw blades are displaced outward to the unfolded state, a complete channel is formed between the three saw blades when the three saw blades are displaced inward to the folded state, the channel can pass through the PVC pipe, and a row of saw teeth is arranged on the bottom of each of the three saw blades.

[0018] The connecting plate is provided with three connecting plates corresponding to the saw blades, one end of each connecting plate is fixedly connected to the top of the corresponding saw blade, and the other end of each connecting plate is fixedly connected to the bottom of the guide part, so as to connect the three saw blades and the guide part.

[0019] In the tunnel broken surrounding rock center deep buried ditch blasting construction tool, the force storage connecting part comprises: a sleeve pipe sleeved on the operation rod and slidably connected to the operation rod in the axial direction, and the sleeve pipe and the operation rod are relatively fixed in the circumferential direction.

[0020] The plurality of elastic telescopic rods corresponding to the saw blades are uniformly distributed in the circumferential direction of the operation rod and are staggered in the axial direction of the operation rod, so as to connect the connecting plate and the sleeve pipe.

[0021] Optionally, the guide part comprises a sliding block, three saw blades are arranged on the sliding block, and the sliding block is arranged in the extension pipe in a sliding mode in a circumferential direction and can slide with the extension pipe in an axial direction.

[0022] An inclined groove is arranged on each sliding block, and the bottom of the inclined groove is arranged inwardly.

[0023] A special-shaped plate is arranged on the sliding block, the top of the special-shaped plate is connected with the corresponding sliding block, the special-shaped plate can slide with the corresponding inclined groove, and the bottom of the special-shaped plate is fixedly connected with the top of the corresponding connecting plate through the negative pressure suction part.

[0024] A supporting plate is arranged on the operating rod in a sleeving mode and can be supported on the bottom of the three sliding blocks.

[0025] Optionally, the operating rod comprises a fixing sleeve, the fixing sleeve is arranged on the operating rod in a sleeving mode, the fixing sleeve is arranged on the bottom of the supporting plate through the L-shaped pipe, and the top of the fixing sleeve can be supported on the bottom of the supporting plate.

[0026] An intermediate rod is arranged on the middle part of the operating rod, the sleeve is arranged on the intermediate rod, the diameter of the intermediate rod is smaller than that of the operating rod, the end surface of the operating rod located on the top of the intermediate rod can be in contact with the top surface of the sleeve, and the end surface of the operating rod located on the bottom of the intermediate rod can be in contact with the bottom surface of the sleeve.

[0027] Optionally, the bottom of the operating rod is provided with a plug rod, the bottom end of the plug rod is conical, and a spiral groove is arranged on the outer surface of the plug rod.

[0028] Optionally, the horizontal section of the L-shaped pipe has a smaller hole diameter than the vertical section, the bottom of each special-shaped plate passes through the inner wall of the extension pipe and extends downward to protrude from the inner wall of the vertical section of the L-shaped pipe and is fixedly connected with the connecting plate, and the bottom of the special-shaped plate is located below the horizontal section of the L-shaped pipe.

[0029] Optionally, the tool further comprises a bracket arranged on the negative pressure suction part, and the bracket comprises:

[0030] A U-shaped plate is arranged on the bottom of the horizontal section of the L-shaped pipe and serves as a base of the bracket.

[0031] Two vertical plates are arranged on the top surface of the U-shaped plate and are located on both sides of the vertical section of the L-shaped pipe.

[0032] The first rotating shaft is arranged at the top of each vertical plate, and the axial direction of the first rotating shaft is parallel to the axial direction of the horizontal section of the L-shaped pipe;

[0033] The second rotating shaft is sleeved on the vertical section of the L-shaped pipe, and the axial direction of the second rotating shaft is perpendicular to the axial direction of the L-shaped pipe;

[0034] The U-shaped rotating rod is fixedly connected with the first rotating shaft on the same side at two ends, and the second rotating shaft is rotatably arranged at the opening of the U-shaped rotating rod.

[0035] In the tunnel broken surrounding rock center deep buried ditch blasting construction tool, the top of the operating rod is fixedly connected with a handle through the top of the negative pressure suction part.

[0036] In the tunnel broken surrounding rock center deep buried ditch blasting construction tool, the negative pressure suction part and the unfolded cutting part are used to clamp the PVC pipe, and when the hole is inserted, the cutting part is controlled to rotate and press down by the operating rod, the bottom of the cutting part is rotated to cut and clean the soil residue and the gravel on the hole wall, so that the PVC pipe can be smoothly inserted into the hole.

[0037] When the cutting part is located at the bottom of the hole, if the gravel and soil residue at the bottom of the hole are relatively large, the bottom of the operating rod and the cutting part is first inserted into the soil residue to cut the soil residue, the top of the negative pressure suction part is connected with a negative pressure suction machine, and the negative pressure suction channel formed by the PVC pipe and the negative pressure suction part is used to realize the suction of the soil residue at the bottom of the hole, so that the PVC pipe can continue to be inserted downward, after the suction of the soil residue at the bottom of the hole is completed, the cutting part contacts the bottom of the hole, the operating rod is pulled upward to fold the cutting part, and then the whole tool is pulled out of the PVC pipe, so as to be used continuously when the hole is inserted next time.

[0038] When the bottom of the hole is irregular, the bottom of the inserting rod cannot contact the bottom of the hole, and the PVC pipe has reached the specified depth and cannot continue to be inserted, the operating rod can be directly pulled upward to fold the cutting part, and then the whole tool is pulled out of the PVC pipe. BRIEF DESCRIPTION OF DRAWINGS

[0039] The disclosure of the present application will be more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings:

[0040] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0041] Figure 2 It is a schematic diagram of the overall structure of the present application after removing the support.

[0042] Figure 3 It is a schematic diagram of the internal structure of the PVC pipe when the cutting part is folded.

[0043] Figure 4The schematic view of the connection structure of the negative pressure suction part, the cutting part and the guiding part of the application.

[0044] Figure 5 The schematic view of the structure of the guiding part of the application.

[0045] Figure 6 The schematic view of the structure of the force storage connecting part of the application.

[0046] Figure 7 The schematic view of the connection structure of the bracket and the negative pressure suction part of the application.

[0047] Figure 8 The schematic view of the connection structure of the insertion rod of the application.

[0048] Reference signs: 1, negative pressure suction part; 1-1, L-shaped pipe; 1-2, extension pipe; 2, PVC pipe; 3, cutting part; 3-1, saw blade; 3-2, connecting plate; 4, force storage connecting part; 4-1, sleeve pipe; 4-2, elastic telescopic rod; 5, guiding part; 5-1, sliding block; 5-2, inclined chute; 5-3, special-shaped plate; 5-4, supporting plate; 6, operating rod; 6-1, fixed sleeve; 6-2, intermediate rod; 7, insertion rod; 7-1, helical groove; 8, bracket; 8-1, U-shaped plate; 8-2, vertical plate; 8-3, first rotating shaft; 8-4, second rotating shaft; 8-5, U-shaped rotating rod; 9, handle. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0050] As shown in the drawings, Figures 1 to 8 a typical embodiment of the application provides a tunnel broken surrounding rock center deep buried ditch blasting construction tool, which comprises a negative pressure suction part 1, a cutting part 3, a force storage connecting part 4, a guiding part 5 and an operating rod 6.

[0051] The negative pressure suction part 1 can be sleeved on the top of the PVC pipe 2 to form a hole negative pressure suction channel with the PVC pipe 2. By connecting a negative pressure suction machine, the hole residue formed by the broken stones and the soil residue at the hole bottom can be sucked out when the PVC pipe 2 is inserted into the hole bottom, so as to facilitate the insertion of the PVC pipe 2 into the hole bottom.

[0052] The cutting part 3 has an expanded state and a contracted state. When installing the PVC pipe 2, the cutting part 3 is contracted so that the cutting part 3 can pass through the PVC pipe 2, the top of the PVC pipe 2 is sleeved on the bottom of the negative pressure suction part 1, the cutting part 3 is expanded so that the cutting part 3 can be supported on the bottom of the PVC pipe 2, the cutting part 3 and the negative pressure suction part 1 clamp the PVC pipe 2, and the PVC pipe 2 can be inserted into the blast hole by pressing the negative pressure suction part 1.

[0053] The force storage connecting part 4 is connected with the cutting part 3 at one end, can provide a radial elastic force for the cutting part 3 when the cutting part 3 is in the expanded state, so that the cutting part 3 can always keep the expanded state during the insertion process and will not contract inward, the cutting part 3 can be stably supported on the bottom of the PVC pipe 2 and clean the hole residues on the hole wall which hinder the insertion.

[0054] The guide part 5 is arranged on the top of the negative pressure suction part 1, the cutting part 3 is connected with the guide part 5, the guide part 5 controls the contraction of the cutting part 3 by upward displacement, so that when the PVC pipe 2 is installed, the guide part 5 is upwardly displaced, the cutting part 3 can be contracted, the elastic force of the force storage connecting part 4 is compressed, and the force storage connecting part 4 starts to store force;

[0055] After the PVC pipe 2 is installed, the guide part 5 is loosened, the elastic force of the force storage connecting part 4 is released, the guide part 5 is downwardly displaced, and the cutting part 3 can be quickly expanded to support the PVC pipe 2.

[0056] The operating rod 6 is arranged in the center of the negative pressure suction part 1, the other end of the force storage connecting part 4 is sleeved on the operating rod 6, and the force storage connecting part 4 is relatively fixed with the operating rod 6 in the circumferential direction, the operating rod 6 can drive the cutting part 3 to rotate, the cutting part 3 supports the PVC pipe 2 during the insertion, the operating rod 6 is pressed to insert the PVC pipe 2 into the hole, and when the insertion encounters an obstacle, the operating rod 6 is rotated to drive the cutting part 3 to rotate, so that the cutting part 3 rotates to cut the hole residues on the hole wall, the PVC pipe 2 can be smoothly inserted into the bottom of the blast hole;

[0057] The force storage connecting part 4 and the operating rod 6 can relatively slide in the axial direction, the guide part 5 is sleeved on the operating rod 6, and the operating rod 6 can drive the guide part 5 to upwardly displace; when the PVC pipe 2 is installed, the cutting part 3 can be contracted by pulling up the operating rod 6, the top of the PVC pipe 2 is sleeved on the bottom of the negative pressure suction part 1, the operating rod 6 is loosened, the elastic force of the force storage connecting part 4 is released, and the cutting part 3 can keep the expanded state to support the PVC pipe 2;

[0058] After the PVC pipe 2 is inserted into the bottom of the blast hole, if there are many hole residues at the bottom of the hole, the cutting part 3 is inserted into the hole residues to cut the residues, the hole residues at the bottom of the hole are cleaned by the negative pressure suction machine, the cutting part 3 can be contracted by pulling up the operating rod 6, and the tool can be pulled out of the PVC pipe 2 by further pulling up;

[0059] If the shape of the hole bottom is irregular, the PVC pipe 2 has been inserted to the specified depth, and the tool can be pulled out of the PVC pipe 2 by pulling the operating rod 6, the whole process is convenient to operate, and the hole residues on the hole wall and the hole bottom can be cleaned at the same time. When the PVC pipe 2 is not inserted to the specified depth, the cutting part 3 can stably cut the hole residues, and the negative pressure suction machine connected to the negative pressure suction part 1 can suck the hole residues on the hole bottom out of the hole.

[0060] In a relatively specific embodiment, the negative pressure suction part 1 includes an L-shaped pipe 1-1 and an extension pipe 1-2.

[0061] The vertical section of the L-shaped pipe 1-1 is sleeved on the top of the PVC pipe 2, and the opening of the horizontal section is provided with a negative pressure suction pipe joint. The pipeline of the negative pressure suction machine can be connected with the negative pressure suction pipe joint. The L-shaped pipe 1-1 can form a hole negative pressure suction channel with the PVC pipe 2. The top surface of the junction between the vertical section and the horizontal section of the L-shaped pipe 1-1 is a slope, which facilitates the hole residues on the hole bottom to be sucked out of the hole along the PVC pipe 2 and the L-shaped pipe 1-1.

[0062] The extension pipe 1-2 is fixedly arranged on the top of the L-shaped pipe 1-1 and is aligned with the center of the vertical section of the L-shaped pipe 1-1. The guide part 5 is arranged in the extension pipe 1-2 and can slide in the axial direction of the extension pipe 1-2. The guide part 5 is arranged above the L-shaped pipe 1-1 and does not affect the suction of the hole residues in the L-shaped pipe 1-1, leaving enough space for the negative pressure suction channel.

[0063] In a relatively specific embodiment, the cutting part 3 includes three saw blades 3-1 and a connecting plate 3-2.

[0064] The three saw blades 3-1 are uniformly distributed on the bottom of the PVC pipe 2 in the circumferential direction. They can be switched between the expanded state and the closed state by displacing along the radial direction of the PVC pipe 2. When the three saw blades 3-1 are displaced outward to the expanded state, the top surfaces of the three saw blades 3-1 can be supported on the bottom of the PVC pipe 2. When the three saw blades 3-1 are displaced inward to the closed state, a complete channel is formed between the three saw blades 3-1. The outer wall diameter of the channel is smaller than the inner wall diameter of the PVC pipe 2. The three saw blades 3-1 can pass through the PVC pipe 2 in the closed state. When the three saw blades 3-1 are closed, the hole residues on the two hole bottoms are gathered in the middle. Since the channel formed by the three saw blades 3-1 is connected with the hole negative pressure suction channel, the bottom aperture of the hole negative pressure suction channel becomes smaller, which facilitates the suction of the hole residues.

[0065] If there are still hole residues in the gap between the three saw blades 3-1 during the closing process of the three saw blades 3-1, the three saw blades 3-1 cannot be closed, which indicates that the hole residues on the hole bottom have not been completely treated, and the saw blades 3-1 cannot be pulled out of the PVC pipe 2.

[0066] After the hole slag at the bottom of the hole is extracted, the three saw blades 3-1 can be smoothly folded, and the PVC pipe 2 can be lowered to the bottom of the hole to complete the insertion hole of the PVC pipe 2.

[0067] The bottom of the saw blade 3-1 is provided with a row of saw teeth, which facilitates cutting of the hole slag of the hole wall and the hole bottom.

[0068] The connecting plate 3-2 is provided with three corresponding saw blades 3-1, one end of which is fixedly connected to the top of the corresponding saw blade 3-1, and the other end is fixedly connected to the bottom of the guide part 5, connecting the three saw blades 3-1 and the guide part 5.

[0069] In a relatively specific embodiment, the force storage connecting part 4 includes a sleeve 4-1 and an elastic telescopic rod 4-2.

[0070] The sleeve 4-1 is sleeved on the operating rod 6 and can be axially slidably connected with the operating rod 6, and the sleeve 4-1 and the operating rod 6 are relatively fixed in the circumferential direction, and the rotation of the operating rod 6 can drive the sleeve 4-1 to rotate.

[0071] The elastic telescopic rod 4-2 is provided with a plurality of corresponding saw blades 3-1, which are uniformly distributed along the circumferential direction of the operating rod 6 and are distributed in the axial direction of the operating rod 6, avoiding the elastic telescopic rod 4-2 being distributed at the same height and affecting the negative pressure suction pipeline, thereby hindering the extraction of the hole slag; the elastic telescopic rod 4-2 connects the connecting plate 3-2 and the sleeve 4-1, and the elastic telescopic rod 4-2 can provide a radial elastic force for the connecting plate 3-2 to keep the three saw blades 3-1 at the bottom of the connecting plate 3-2 in an unfolded state, and provide a guiding effect for the unfolding and folding of the three saw blades 3-1.

[0072] In a relatively specific embodiment, the guide part 5 includes a sliding block 5-1, an inclined chute 5-2, a special-shaped plate 5-3 and a supporting plate 5-4.

[0073] The sliding block 5-1 is provided with three corresponding saw blades 3-1 and is slidably arranged in the extension pipe 1-2 in the circumferential direction, and can be slidably connected with the extension pipe 1-2 in the axial direction.

[0074] The inclined groove 5-2 is provided with two on each sliding block 5-1, the bottom of the inclined groove 5-2 is inwardly arranged, the special-shaped plate 5-3 is provided with three corresponding to the sliding block 5-1, the top of the special-shaped plate 5-3 is connected with the corresponding sliding block 5-1, which can be slidably connected with the corresponding inclined groove 5-2, the bottom of the special-shaped plate 5-3 is fixedly connected with the top of the bottom corresponding connecting plate 3-2 through the negative pressure suction part 1, the supporting plate 5-4 is slidably sleeved on the operating rod 6 and can be supported on the bottom of the three sliding blocks 5-1, when the supporting plate 5-4 supports the upward displacement of the sliding block 5-1, the connecting plate 3-2 is limited and guided by the elastic expansion rod 4-2, and can only move along the radial direction of the operating rod 6, so that the special-shaped plate 5-3 slides relative to the inclined groove 5-2, the bottom of the inclined groove 5-2 is inwardly opened, and the special-shaped plate 5-3 moves inwardly along the radial direction of the operating rod 6 under the guidance of the elastic expansion rod 4-2, thereby driving the saw blade 3-1 to move inwardly, and the three saw blades 3-1 can simultaneously move inwardly to the folding state.

[0075] In a relatively specific embodiment, the operating rod 6 comprises a fixed sleeve 6-1 and an intermediate rod 6-2.

[0076] The fixed sleeve 6-1 is sleeved on the operating rod 6, the fixed sleeve 6-1 is located at the bottom of the supporting plate 5-4 through the L-shaped pipe 1-1, the top of the fixed sleeve 6-1 can be supported on the bottom of the supporting plate 5-4, the operating rod 6 can be raised to drive the supporting plate 5-4 to rise through the fixed sleeve 6-1, the supporting plate 5-4 can be raised to drive the three sliding blocks 5-1 to rise, and the three sliding blocks 5-1 can be raised to drive the three saw blades 3-1 to fold, thereby realizing the control of the folding of the three saw blades 3-1 by the upward pulling of the operating rod 6.

[0077] The intermediate rod 6-2 is arranged at the middle part of the operating rod 6, the sleeve 4-1 is sleeved on the intermediate rod 6-2, the diameter of the intermediate rod 6-2 is smaller than that of the operating rod 6, the end surface of the operating rod 6 located at the top of the intermediate rod 6-2 can be in contact with the top surface of the sleeve 4-1, when the operating rod 6 is pressed downward, the operating rod 6 moves downward, the end surface of the operating rod 6 located at the top of the intermediate rod 6-2 can be in contact with the top surface of the sleeve 4-1, the sleeve 4-1 is connected with the cutting part 3 through the elastic expansion rod 4-2, at this time, the operating rod 6 is supported by the cutting part 3, and the cutting part 3 can be pressed downward into the hole by pressing the operating rod 6, and the cutting part 3 can rotate the hole slag of the hole wall and the hole bottom by rotating the operating rod 6.

[0078] When the operating rod 6 is pulled upward, the operating rod 6 moves upward, the end surface of the operating rod 6 located at the bottom of the intermediate rod 6-2 can be in contact with the bottom surface of the sleeve 4-1, in this process, the operating rod 6 can make the cutting part 3 fold, at this time, the folded cutting part 3 can be moved upward together by continuing to pull the operating rod 6 upward, and the PVC pipe 2 is separated.

[0079] In a relatively specific embodiment, the bottom of the operating rod 6 is provided with a plug rod 7, the bottom end of the plug rod 7 is tapered, and the outer surface of the plug rod 7 is provided with a spiral groove 7-1. When the operating rod 6 is pressed into the hole, the top of the sleeve 4-1 is in contact with the end face of the operating rod 6 located at the top of the middle rod 6-2. At this time, the bottom of the plug rod 7 is located below the saw blade 3-1. The hole slag is formed by soil slag and gravel, which is relatively loose. When the plug rod 7 contacts the hole slag at the bottom of the hole, it can be inserted into the hole slag. If there is too much hole slag at the bottom of the hole, the operating rod 6 can be rotated to cooperate with the spiral groove 7-1 to stir the hole slag outward, which is convenient for negative pressure suction to separate the hole slag, so that the cutting part 3 can continue to be inserted into the hole until it is in contact with the bottom of the hole. The plug rod 7 is supported upward to the bottom of the cutting part 3, so that the operating rod 6 is displaced upward, and the three moving saw blades 3-1 are closed, so that the PVC pipe 2 can be displaced downward to the bottom of the hole, and the insertion of the PVC pipe 2 is completed. At this time, continue to pull the operating rod 6 upward to pull the entire tool out of the PVC pipe 2.

[0080] If the PVC pipe 2 is inserted to the specified depth, the plug rod 7 is not supported upward by the bottom of the hole, indicating that the shape of the hole at the bottom of the hole is irregular. At this time, the operating rod 6 can be directly pulled upward to make the three saw blades 3-1 close and pull the entire tool out of the PVC pipe 2.

[0081] In a relatively specific embodiment, the horizontal section of the L-shaped pipe 1-1 has a smaller hole diameter than the vertical section. The bottoms of the three special-shaped plates 5-3 pass through the inner wall of the extension pipe 1-2 and extend downward to be fixedly connected to the inner wall of the vertical section of the L-shaped pipe 1-1. The bottoms of the special-shaped plates 5-3 are located below the horizontal section of the L-shaped pipe 1-1. The special-shaped plates 5-3 can be radially displaced in the inner wall of the extension pipe 1-2, and will not block the hole slag from being removed at the inner hole of the horizontal section of the L-shaped pipe 1-1 during negative pressure suction of the hole slag.

[0082] In a relatively specific embodiment, a bracket 8 is further provided on the negative pressure suction part 1. The bracket 8 includes a U-shaped plate 8-1, a vertical plate 8-2, a first rotating shaft 8-3, a second rotating shaft 8-4, and a U-shaped rotating rod 8-5.

[0083] The opening of the U-shaped plate 8-1 is perpendicular to the L-shaped pipe 1-1 and is located at the bottom of the horizontal section of the L-shaped pipe 1-1, serving as the base of the support 8; two vertical plates 8-2 are arranged on the top surface of the U-shaped plate 8-1 and are located on the two sides of the vertical section of the L-shaped pipe 1-1, respectively; a first rotating shaft 8-3 is arranged on the top of each vertical plate 8-2, and the axial direction of the first rotating shaft 8-3 is parallel to the axis of the horizontal section of the L-shaped pipe 1-1; a second rotating shaft 8-4 is sleeved on the vertical section of the L-shaped pipe 1-1, and the axial direction of the second rotating shaft 8-4 is perpendicular to the axial direction of the L-shaped pipe 1-1; and the two ends of a U-shaped rotating rod 8-5 are fixedly connected with the first rotating shaft 8-3 on the same side, and the second rotating shaft 8-4 is rotatably arranged at the opening of the U-shaped rotating rod 8-5.

[0084] The support 8 is first placed at the hole opening of the blast hole, then the cutting part 3 is sleeved from above the second rotating shaft 8-4, and the orientation of the bottom of the cutting part 3 can be adjusted through the first rotating shaft 8-3 and the second rotating shaft 8-4 to align the blast hole, and the position of the support 8 can also be adjusted according to the condition of the blast hole, so that the operation process is flexible and convenient; when the cutting part 3 can be inserted into the blast hole to a certain depth, it indicates that the support 8 has been adjusted to the appropriate position, then the cutting part 3 is pulled out of the second rotating shaft 8-4, the U-shaped plate 8-1 is fixed to the ground through the conventional setting, so that the support 8 is stable, then the PVC pipe 2 is clamped between the negative pressure suction part 1 and the cutting part 3 and is sleeved in the second rotating shaft 8-4 to perform the hole insertion. The support 8 has the effect of pre-holing and can assist the hole insertion of the PVC pipe 2.

[0085] In a relatively specific embodiment, a handle 9 is fixedly connected to the top of the operating rod 6 through the top of the negative pressure suction part 1, so as to facilitate the construction personnel to control the downward pressing, upward pulling and rotating of the operating rod 6.

[0086] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical concept of the present application, and these modifications and changes should be within the scope of the present application.

Claims

1. A blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels, characterized in that, include: The negative pressure suction unit (1) can be sleeved on the top of the PVC pipe (2) to form a negative pressure suction channel inside the hole with the PVC pipe (2) to extract the hole slag; The cutting part (3) has an unfolded state and a retracted state. When the cutting part (3) is in the retracted state, it can pass through the PVC pipe (2). When the cutting part (3) is in the unfolded state, it can be supported at the bottom of the PVC pipe (2). The power storage connection part (4) is connected at one end to the cutting part (3) and can provide radial elastic force to the cutting part (3) when the cutting part (3) is in the unfolded state; The guide part (5) is located at the top of the negative pressure suction part (1). The cutting part (3) is connected to the guide part (5). The guide part (5) can control the cutting part (3) to close by moving upward. The operating rod (6) is inserted through the center of the negative pressure suction part (1). The other end of the power storage connection part (4) is sleeved on the operating rod (6), and the power storage connection part (4) and the operating rod (6) are relatively fixed in the circumferential direction. The operating rod (6) can drive the cutting part (3) to rotate. The power storage connection (4) and the operating rod (6) can slide relative to each other in the axial direction. The guide part (5) is sleeved on the operating rod (6). The operating rod (6) can drive the guide part (5) to move upward.

2. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 1, characterized in that, The negative pressure suction unit (1) includes: L-shaped tube (1-1), the vertical section is sleeved on the top of PVC pipe (2), and a negative pressure suction pipe joint is provided at the opening of the horizontal section. The L-shaped tube (1-1) can form an internal negative pressure suction channel with PVC pipe (2). The top surface of the junction of the vertical section and the horizontal section of the L-shaped tube (1-1) is a slope. The extension tube (1-2) is fixedly installed on the top of the L-shaped tube (1-1) and aligned with the center of the vertical section of the L-shaped tube (1-1). The guide part (5) is installed inside the extension tube (1-2) and can slide in axially with the extension tube (1-2). The top of the operating lever (6) passes through the top of the extension tube (1-2) and extends to the outside of the extension tube (1-2).

3. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 2, characterized in that, The cutting section (3) includes: Three saw blades (3-1) are evenly distributed at the bottom of the PVC pipe (2) along the circumference and can switch between an unfolded state and a retracted state by moving inward and outward along the radial direction of the PVC pipe (2). When the three saw blades (3-1) move outward to the unfolded state, the top surface of the three saw blades (3-1) can support the bottom of the PVC pipe (2). When the three saw blades (3-1) move inward to the retracted state, a complete channel is formed between the three saw blades (3-1) and can pass through the PVC pipe (2). A row of saw teeth is provided at the bottom of each of the three saw blades (3-1). The connecting plate (3-2) has three corresponding saw blades (3-1). One end is fixedly connected to the top of the corresponding saw blade (3-1), and the other end is fixedly connected to the bottom of the guide part (5), connecting the three saw blades (3-1) and the guide part (5).

4. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 3, characterized in that, The energy storage connection part (4) includes: The sleeve (4-1) is sleeved on the operating rod (6) and can slide in axial direction with the operating rod (6). The sleeve (4-1) and the operating rod (6) are relatively fixed in the circumferential direction. Multiple elastic telescopic rods (4-2) are provided corresponding to the saw blade (3-1), evenly distributed along the circumference of the operating rod (6) and staggered along the axial direction of the operating rod (6), connecting the connecting plate (3-2) and the sleeve (4-1).

5. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 4, characterized in that, The guide section (5) includes: The slider (5-1) has three corresponding to the saw blade (3-1) and is evenly distributed in the circumferential direction in the extension tube (1-2), and can slide and cooperate with the extension tube (1-2) in the axial direction. Inclined grooves (5-2) are provided on each slider (5-1), and the bottom of each inclined groove (5-2) is facing inward. The irregular plate (5-3) has three corresponding sliders (5-1). The top of the irregular plate (5-3) is connected to the upper corresponding slider (5-1) and can slide with the corresponding inclined groove (5-2). The bottom passes through the negative pressure suction part (1) and is fixedly connected to the top of the bottom corresponding connecting plate (3-2). The tray (5-4) is slidably mounted on the operating rod (6) and can be supported on the bottom of the three sliders (5-1).

6. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 5, characterized in that, The operating lever (6) includes: A fixing sleeve (6-1) is fitted onto the operating rod (6). The fixing sleeve (6-1) passes through the L-shaped tube (1-1) and is located at the bottom of the tray (5-4). The top of the fixing sleeve (6-1) can be supported on the bottom of the tray (5-4). The intermediate rod (6-2) is set in the middle part of the operating rod (6). The sleeve (4-1) is sleeved on the intermediate rod (6-2). The diameter of the intermediate rod (6-2) is smaller than the diameter of the operating rod (6). The end face of the operating rod (6) at the top of the intermediate rod (6-2) can contact the top surface of the sleeve (4-1), and the end face of the operating rod (6) at the bottom of the intermediate rod (6-2) can contact the bottom surface of the sleeve (4-1).

7. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 6, characterized in that, The bottom of the operating lever (6) is provided with a plug (7), the bottom end of the plug (7) is conical, and the outer surface of the plug (7) is provided with a spiral groove (7-1).

8. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 5, characterized in that, The horizontal section of the L-shaped tube (1-1) has a smaller aperture than the vertical section. The bottoms of the three irregular plates (5-3) all pass through the inner wall of the extension tube (1-2) and extend downwards from the inner wall of the vertical section of the L-shaped tube (1-1) to be fixedly connected to the connecting plate (3-2). The bottom of the irregular plate (5-3) is located below the horizontal section of the L-shaped tube (1-1).

9. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 2, characterized in that, It also includes a bracket (8) fitted onto the negative pressure suction unit (1), the bracket (8) comprising: The U-shaped plate (8-1) has its opening facing perpendicular to the L-shaped tube (1-1) and is located at the bottom of the horizontal section of the L-shaped tube (1-1), serving as the base of the support (8). There are two vertical plates (8-2), both of which are fixedly installed on the top surface of the U-shaped plate (8-1) and located on both sides of the vertical section of the L-shaped tube (1-1); The first rotating shaft (8-3) is rotatably provided at the top of each vertical plate (8-2), and the axial direction of the first rotating shaft (8-3) is parallel to the axial direction of the horizontal section of the L-shaped tube (1-1); The second rotating shaft (8-4) is sleeved on the vertical section of the L-shaped tube (1-1), and the axial direction of the second rotating shaft (8-4) is perpendicular to the axial direction of the L-shaped tube (1-1). The U-shaped rotating rod (8-5) is fixedly connected at both ends to the first rotating shaft (8-3) on the same side, and the second rotating shaft (8-4) is rotatably installed at the opening of the U-shaped rotating rod (8-5).

10. The blasting tool for deep-buried water trenches in the center of fractured surrounding rock in tunnels as described in claim 1, characterized in that, The top of the operating lever (6) is fixedly connected to the top of the negative pressure suction part (1) with a handle (9).

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