Grouting reinforcement roadway surrounding rock water-cooling coring drilling device

Abstract

The invention discloses a grouting reinforcement roadway surrounding rock water-cooling coring and drilling device, which relates to the technical field of coring and drilling, and comprises an outer pipe assembly, an inner pipe assembly, a drill bit assembly and a fishing assembly, a cooling cavity is defined between the outer coring cylinder and the inner coring cylinder, the cooling cavity is connected with a water supply system, and the water supply system supplies cooling liquid into the cooling cavity; the drill bit assembly comprises a drill bit body fixed to the bottom of the outer coring cylinder, and drill edges are evenly arranged on the outer side of the bottom of the drill bit body. A drill cavity communicated with the cooling cavity is formed in the drill bit body, and a coring hole is formed in the middle of the bottom of the drill bit body. And cooling holes are formed in the bottom of the drill cavity around the circumferential direction of the coring hole. A cooling hole and a coring hole are separated on the coring drill bit, so that the spraying area of cooling liquid is reduced, the flow speed of the cooling liquid is reduced, the cooling liquid is fully utilized, and the energy consumption is reduced; meanwhile, the impact of the cooling liquid on the rock core is avoided, the problem that the rock core is scattered is avoided, and a large amount of cooling liquid is prevented from entering the inner coring barrel to damage the rock core.

Description

Technical Field

[0001] The invention relates to the technical field of coring and drilling, and in particular to a water-cooled coring and drilling device for grouting and reinforcing tunnel surrounding rocks. Background Art

[0002] The coring drill is a commonly used sampling equipment, including an inner coring barrel and an outer coring barrel. A coring drill bit is fixedly installed at the bottom of the outer coring barrel, and a coring hole is set at the bottom of the coring drill bit, which is directly opposite to the lower barrel mouth of the inner coring barrel. Its working principle is to drive the outer coring barrel to rotate through the drill rod, and then drive the coring drill bit to rotate. The coring drill bit and the ore layer form a rotating cutting to remove the core; the core enters the inner coring barrel through the coring hole, and is prevented from falling out by the blocking effect of the retaining spring at the bottom of the inner coring barrel; after the coring is completed, the core is brought back to the surface as a whole with the inner coring barrel.

[0003] When the coring drill is drilled for a long time, the friction between the coring drill and the ore layer and between the inner coring barrel and the core will generate high temperature, which will reduce the hardness of the inner coring barrel and the coring drill bit, thereby reducing the wear resistance of the inner coring barrel and the coring drill bit. Therefore, the existing sampling equipment is generally equipped with a cooling system, and there is a gap of 3-5mm between the inner coring barrel and the coring hole; the coolant flows into the gap between the inner coring barrel and the outer coring barrel through the internal locking part and the adapter connection part, and then flows out from the gap between the inner coring barrel and the coring drill bit, thereby realizing the cooling of the drill bit and the inner coring barrel by the coolant. However, this cooling method has the following problems: the coolant flows at a fast speed, so the coolant is not fully utilized, resulting in a waste of resources; in addition, the coolant is discharged from the coring hole, and when encountering a relatively soft core sample, the coolant easily disperses the core; in addition, a large amount of coolant enters the inner coring barrel. When the core enters the inner coring barrel, the pressure is too high, causing damage to the core or deformation of the inner coring barrel. Summary of the invention

[0004] The purpose of the present invention is to provide a water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock, which can separate the cooling hole and the coring hole on the coring drill bit, thereby reducing the area of ​​coolant spraying, reducing the flow rate of the coolant, achieving full utilization of the coolant, and reducing energy consumption; at the same time, it can avoid the impact of the coolant on the core, avoid the problem of core dispersion, and avoid a large amount of coolant entering the inner coring barrel to cause damage to the core.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] A water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock comprises an outer tube assembly, an inner tube assembly sleeved in the outer tube assembly, a drill bit assembly installed at the bottom of the outer tube assembly and a salvage assembly installed at the top of the inner tube assembly; the outer tube assembly comprises an outer coring barrel, the top of the outer coring barrel is fixed on the drill rod, and the bottom is fixedly mounted with a drill bit assembly; the inner tube assembly comprises an inner coring barrel and a head assembly fixed on the top of the inner coring barrel, the head assembly is fixed to the salvage assembly, and the inner coring barrel, the head assembly and the salvage assembly are all inserted into the outer coring barrel; a cooling chamber is formed between the outer coring barrel and the inner coring barrel, and the cooling chamber is connected with A water supply system supplies coolant to the cooling chamber; the drill assembly comprises a drill body fixed at the bottom of an outer coring barrel, drill blades are evenly arranged on the outer side of the bottom of the drill body, and a plurality of drill blades are parallel to each other and extend from the middle of the drill body to its outer edge; a chip removal channel is formed between adjacent drill blades; a drill cavity connected to the cooling chamber is arranged inside the drill body, a coring hole connecting the drill cavity and the bottom of the drill body is arranged in the middle of the bottom of the drill body, and the coring hole abuts against the inner coring barrel; a plurality of cooling holes are evenly arranged on the bottom of the drill cavity around the circumference of the coring hole, and the cooling holes connect the cooling chamber with the outside.

[0007] After adopting the above structure, when the water supply system supplies coolant to the cooling cavity, the coolant flows downward from the cooling cavity and then enters the drilling cavity. The coolant is sprayed downward from the cooling hole at the bottom of the drilling cavity to cool the drill bit; and the core enters the inner coring barrel from the coring hole. Through this structure, the coolant is sprayed from the cooling hole to the periphery of the drill bit body, which can avoid contact with the core, thereby avoiding the core from being dispersed; at the same time, by setting the cooling hole, the cooling hole reduces the spray port diameter of the coolant, and generally reduces the flow rate of the coolant, so that the coolant can fully stay in the drilling cavity, ensuring that enough heat is taken away, thereby improving the utilization rate of the coolant; at the same time, by separating the cooling hole from the coring hole, it is prevented that too much coolant enters the inner coring barrel, causing excessive pressure in the inner coring, thereby causing damage to the core or damage to the inner coring barrel.

[0008] Preferably, a coring tube extending into the drilling cavity is fixed on the coring hole, and the coring tube forms a coring channel; the inner coring tube abuts against the top of the coring tube. With this design, the distance between the barrel opening of the inner coring tube and the bottom of the drill body can be extended, thereby preventing the inner coring tube from being accidentally damaged by broken stones; at the same time, it is prevented that the temperature of the newly cut core is too high and transmitted to the inner coring tube, causing the temperature of the inner coring tube to be too high.

[0009] Preferably, the cooling hole is located between adjacent drill blades. With this design, the coolant can flow between the two drill blades, which can fully cool the drill blades and guide the coolant upward into the drill hole.

[0010] Preferably, the drill body is provided with a first fin extending into the drill cavity; the core tube is provided with a second fin extending into the drill cavity, and both the first fin and the second fin are annular structures and are arranged in a staggered manner. Through this design, the contact area between the drill body and the coolant is increased, and the cooling efficiency is improved; at the same time, the flow speed of the coolant in the drill cavity is reduced, and its utilization rate is improved.

[0011] Preferably, the first fin and the second fin are arranged obliquely downward from the fixed end to the suspended end. Through this arrangement, the strength and flow guiding effect of the first fin and the second fin can be improved.

[0012] Preferably, a water spray hole connecting the upper part of the drill bit body and the drill cavity is arranged in the middle of the drill blade on the drill bit body. Through this arrangement, the cooling effect of the drill blade can be further improved, and the effect of spiral upward spraying can be achieved, and the deposition of mud can be avoided.

[0013] Preferably, the outer side of the outer core barrel is provided with a blade spirally upward, and the covering diameter of the blade is smaller than the covering diameter of the drill blade. Through this design, the contact between the blade and the side wall of the drill hole is avoided, which causes damage to the blade.

[0014] Preferably, the bottom of the drilling cavity is provided with a guide groove protruding upward, and the cooling hole is located in the guide groove. Through this design, the contact area between the drill body and the coolant can be increased, and the cooling effect can be improved.

[0015] Preferably, a rubber ring is provided at the bottom of the inner coring barrel. Through this design, the cooling liquid can be blocked to prevent the cooling liquid from entering the inner coring barrel too much.

[0016] Preferably, reinforcing ribs are evenly arranged on the outer circumference of the drill bit body above the drill blade. The reinforcing ribs can increase the contact area between the coolant and the drill bit body, thereby improving its heat exchange efficiency.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are:

[0018] The present invention discloses a grouting reinforced tunnel surrounding rock water-cooled coring drilling device, which solves the technical problem in the prior art that the outlet of the coolant and the inlet of the core are the same, causing the coolant to damage the core. The present invention separates the cooling hole and the coring hole on the coring drill bit, thereby reducing the area of ​​the coolant spraying, reducing the flow rate of the coolant, achieving full utilization of the coolant, and reducing energy consumption; at the same time, it avoids the impact of the coolant on the core, avoids the problem of the core being dispersed, and avoids a large amount of coolant entering the inner coring barrel to cause damage to the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the installation structure of a water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the Nakamoto device and rock formations;

[0021] Figure 3 yes Figure 2 Schematic diagram without rock layers;

[0022] Figure 4 yes Figure 3 Schematic diagram of the structure;

[0023] Figure 5 is a schematic diagram of the structure of the drill assembly;

[0024] Figure 6 yes Figure 5 Schematic diagram of the internal structure;

[0025] Figure 7 yes Figure 5 A side sectional view of

[0026] Figure 8 yes Figure 7 Side cross-sectional view of the drill bit assembly at AA.

[0027] In the figure, 1, outer coring barrel, 11, blade, 2, inner coring barrel, 3, drill bit assembly, 31, drill bit body, 311, first fin, 313, reinforcing rib, 32, drill blade, 321, water spray hole, 33, drill cavity, 331, cooling hole, 332, coring hole, 333, guide groove, 34, coring tube, 341, second fin, 35, rubber ring. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] The orientations mentioned in this specification are based on the orientations of the water-cooled coring and drilling device for grouting and reinforcing tunnel surrounding rock of the present invention when it is working normally, and do not limit its orientation during storage and transportation. It only represents a relative position relationship, not an absolute position relationship.

[0030] like Figure 1 - Figure 8 As shown in the figure, a water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock is installed on a drilling rig, which is provided with a clamping mechanism for clamping a drill rod, a slewing mechanism for controlling the rotation of the clamping mechanism, a feeding mechanism for controlling the drilling of the clamping mechanism, a lifting mechanism for controlling the lifting of the clamping mechanism, and a cooling system for cooling the drill tool. The drilling rig has a crawler chassis, which can travel smoothly on complex terrain to ensure that the drilling rig reaches the drilling site.

[0031] A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock comprises an outer tube assembly, an inner tube assembly sleeved in the outer tube assembly, a drill bit assembly 3 installed at the bottom of the outer tube assembly, and a salvage assembly installed at the top of the inner tube assembly. The outer tube assembly comprises an outer coring barrel 1, the top of the outer coring barrel 1 is fixed on a drill rod, and the drill bit assembly 3 is fixedly installed at the bottom. The drill rod is clamped on a clamping mechanism. The outer coring barrel 1 is driven to rotate by the rotation of the drill rod, thereby driving the drill bit assembly 3 to rotate.

[0032] The inner tube assembly includes an inner coring tube 2 and a head assembly fixed to the top of the inner coring tube 2, and the head assembly is fixed to the salvage assembly; the inner coring tube 2, the head assembly and the salvage assembly are all inserted into the outer coring tube 1. In order to prevent the core entering the inner coring tube 2 from escaping, a retaining spring and a retaining seat are installed at the bottom of the inner coring tube 2. A cooling chamber is formed between the outer coring tube 1 and the inner coring tube 2, and the cooling system includes a water supply system, which supplies coolant to the cooling chamber.

[0033] The drill assembly 3 includes a drill body 31 fixed at the bottom of the outer core barrel 1. Drill blades 32 are evenly arranged on the outer side of the bottom of the drill body 31. The multiple drill blades 32 are parallel to each other and extend from the middle of the drill body 31 to its outer edge. A chip removal channel is formed between adjacent drill blades 32; a drill cavity 33 connected to the cooling cavity is arranged inside the drill body 31, and a core hole 332 connecting the drill cavity 33 and the bottom of the drill body 31 is arranged in the middle of the bottom of the drill body 31. The core hole 332 abuts against the inner core barrel 2; a plurality of cooling holes 331 are evenly arranged around the circumference of the core hole 332 at the bottom of the drill cavity 33, and the cooling holes 331 connect the cooling cavity with the outside. In this embodiment, the cooling holes 331 are located between adjacent drill blades 32; through the diversion effect of the adjacent drill blades 32, the coolant is guided to the outside of the drill body 31, so that it can smoothly enter the annulus between the outer core barrel 1 and the borehole.

[0034] A rubber ring 35 is provided at the bottom of the inner coring barrel 2 ; the rubber ring 35 rubs against the core, thereby preventing the coolant from entering the inner coring barrel 2 .

[0035] When the water supply system supplies coolant to the cooling chamber, the coolant flows downward from the cooling chamber and then enters the drilling chamber 33. The coolant is sprayed downward from the cooling hole 331 at the bottom of the drilling chamber 33 to cool the drill bit, and the core enters the inner coring barrel 2 from the coring hole 332. Through this structure, the coolant is sprayed from the cooling hole 331 to the periphery of the drill bit body 31, which can avoid contact with the core, thereby avoiding the core from being dispersed; at the same time, by setting the cooling hole 331, the cooling hole 331 reduces the spray port diameter of the coolant, and generally reduces the flow rate of the coolant, so that the coolant can fully stay in the drilling chamber 33, ensuring that enough heat is taken away, thereby improving the utilization rate of the coolant; at the same time, by separating the cooling hole 331 from the coring hole 332, the coolant is prevented from entering the inner coring barrel 2 and causing damage to the core. The bottom of the drilling cavity 33 is provided with an upwardly protruding guide groove 333, and the cooling hole 331 is located in the guide groove 333; the setting of the guide groove 333 not only guides the coolant, but also increases the contact area between the drill body 31 and the coolant, thereby increasing its heat exchange efficiency.

[0036] Furthermore, a coring tube 34 extending into the drilling cavity 33 is fixed on the coring hole 332, and the coring tube 34 forms a coring channel; the inner coring barrel 2 abuts against the top of the coring tube 34. The coring tube 34 can extend the distance between the inner coring barrel 2 and the bottom of the coring hole 332, which not only prevents the inner coring barrel 2 from being accidentally damaged by gravel, but also fully cools the core before entering the inner coring barrel 2, avoiding excessive temperature at the entrance of the inner coring barrel 2, causing the temperature of the inner coring barrel 2 to be too high; at the same time, the coring channel and the drilling cavity 33 are further isolated to prevent the coolant from entering the inner coring barrel 2.

[0037] In order to further reduce the flow rate of the coolant in the drilling cavity 33 and take away as much heat as possible from the drill body 31, a first fin 311 extending into the drilling cavity 33 is provided on the drill body 31; a second fin 341 extending into the drilling cavity 33 is provided on the core tube 34, and the first fin 311 and the second fin 341 are both annular structures and are arranged in a staggered manner. The first fin 311 and the second fin 341 increase the contact area between the drill body 31 and the coolant, so that the coolant is fully cooled; in addition, the staggered first fin 311 and the second fin 341 can reduce the flow rate of the coolant, and at the same time cause the mixing of the coolant, thereby improving the utilization rate of the coolant.

[0038] In order to increase the guiding effect of the first fin 311 and the second fin 341 and improve the strength of the first fin 311 and the second fin 341 , the first fin 311 and the second fin 341 are arranged to be inclined downward from the fixed end to the suspended end.

[0039] In order to further improve the cooling effect of the drill blade 32 and spirally blow the mud above the drill body 31 to prevent it from settling at the bottom, a water spray hole 321 connecting the top of the drill body 31 and the drill cavity 33 is provided in the middle of the drill blade 32 on the drill body 31.

[0040] In order to allow the mud and coolant at the bottom of the borehole to be stably drained upward, a spiral upward blade 11 is provided on the outer side of the outer core barrel 1 , and the covering diameter of the blade 11 is smaller than the covering diameter of the drill blade 32 .

[0041] Reinforcement ribs 313 are evenly arranged on the outer circumference of the drill bit body 31 above the drill blade 32. The reinforcement ribs 313 increase the strength of the drill bit body 31 and can stir the mud to prevent it from settling at the bottom of the borehole.

[0042] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock, comprising an outer tube assembly, an inner tube assembly sleeved inside the outer tube assembly, a drill bit assembly installed at the bottom of the outer tube assembly, and a salvage assembly installed at the top of the inner tube assembly; the outer tube assembly comprises an outer coring barrel, the top of the outer coring barrel is fixed on the drill rod, and the drill bit assembly is fixedly installed at the bottom; the inner tube assembly comprises an inner coring barrel and a head assembly fixed on the top of the inner coring barrel, the head assembly is fixed to the salvage assembly, and the inner coring barrel, the head assembly and the salvage assembly are all inserted into the outer coring barrel; characterized in that: A cooling cavity is formed between the outer coring tube and the inner coring tube, and the cooling cavity is connected to a water supply system, and the water supply system supplies cooling liquid into the cooling cavity; The drill assembly includes a drill body fixed at the bottom of the outer coring barrel, and drill blades are evenly arranged on the outer side of the bottom of the drill body. The multiple drill blades are parallel to each other and extend from the middle of the drill body to its outer edge; a chip removal channel is formed between adjacent drill blades; a drill cavity connected to the cooling cavity is arranged inside the drill body, and a coring hole connecting the drill cavity and the bottom of the drill body is arranged in the middle of the bottom of the drill body, and the coring hole abuts the inner coring barrel; a plurality of cooling holes are evenly arranged on the bottom of the drill cavity around the circumference of the coring hole, and the cooling holes connect the cooling cavity with the outside.

2. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock according to claim 1, characterized in that: A coring tube extending into the drilling cavity is fixed on the coring hole, and the coring tube forms a coring channel; the inner coring tube abuts against the top of the coring tube.

3. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock according to claim 2, characterized in that: The cooling holes are located between adjacent drill blades.

4. A water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock according to claim 2, characterized in that: The drill body is provided with a first fin extending into the drilling cavity; the core tube is provided with a second fin extending into the drilling cavity, and the first fin and the second fin are both annular structures and are staggeredly arranged.

5. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock according to claim 4, characterized in that: The first fin and the second fin are arranged obliquely downward from the fixed end to the suspended end.

6. A water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock according to claim 4, characterized in that: A water spray hole communicating with the upper part of the drill bit body and the drill cavity is arranged in the middle of the drill blade on the drill bit body.

7. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock according to claim 1, characterized in that: The outer side of the outer core-taking barrel is provided with blades spirally upward, and the covering diameter of the blades is smaller than the covering diameter of the drill blade.

8. The water-cooled coring drilling device for grouting reinforcement of tunnel surrounding rock according to claim 1, characterized in that: The bottom of the drilling cavity is provided with a guide groove protruding upward, and the cooling hole is located in the guide groove.

9. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock according to claim 2, characterized in that: A rubber ring is arranged at the bottom of the inner coring tube.

10. A water-cooled coring and drilling device for grouting reinforcement of tunnel surrounding rock according to claim 1, characterized in that: Reinforcing ribs are evenly arranged on the outer circumference of the drill body and above the drill blade.

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