Vertical shaft excavation drilling tool and device based on urease

Abstract

The vertical shaft excavation drilling tool comprises a liquid injection mechanism used for injecting a urease solution and a drill rod, a drill bit is fixedly installed at one end of the drill rod, a groove is formed in the side wall of the drill rod and extends in the length direction of the drill rod, and the liquid injection mechanism is used for injecting the urease solution. A liquid inlet hole and a plurality of liquid outlet holes which are communicated with the groove are formed in the side wall of the drill rod, the liquid inlet hole is located at the end, away from the drill bit, of the drill rod, the liquid outlet holes are distributed in the length direction of the groove and located at the end, close to the drill bit, of the drill rod, and the liquid injection mechanism is communicated with the liquid inlet hole. The utility model aims to solve the problems that in the prior art, cement slurry materials or cement-water glass mixed slurry is mostly adopted to block cracks after water leakage of the side wall of a vertical shaft, but the cement slurry materials can shrink after being hardened, small cracks are easily generated, the cracks are gradually enlarged under hydraulic scouring, and the water blocking effect is poor. And the construction difficulty of plugging the crack after water leakage is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling, in particular to a vertical shaft excavation drilling tool and device based on urease. BACKGROUND

[0002] The construction of deep vertical shafts or the downward extension of existing shafts will inevitably approach, affect and destroy aquifers or water systems, especially in soft rock and bedrock fissure zones, which are prone to water disasters, which may delay the construction period, affect construction safety, increase costs, cause seepage accidents, even scrap the entire project, and result in loss of manpower and financial resources.

[0003] Currently, cement slurry or cement-silicate slurry is used to seal cracks after the vertical shaft sidewall leaks, but the cement slurry will shrink after hardening, which may cause small cracks that gradually increase under water erosion, resulting in poor water sealing effect. SUMMARY

[0004] Therefore, the utility model discloses a vertical shaft excavation drilling tool and device based on urease to solve the problem of poor water sealing effect caused by the shrinkage of cement slurry after hardening, which may cause small cracks that gradually increase under water erosion.

[0005] The utility model discloses the following technical solutions:

[0006] A vertical shaft excavation drilling tool based on urease, comprising a liquid injection mechanism for injecting urea solution and a drill rod, one end of the drill rod is fixedly installed with a drill bit, a groove is formed on the sidewall of the drill rod, the groove extends along the length direction of the drill rod, a liquid inlet hole and a plurality of liquid outlet holes are formed on the sidewall of the drill rod and communicate with the groove, the liquid inlet hole is located at the end of the drill rod away from the drill bit, the plurality of liquid outlet holes are distributed along the length direction of the groove and located at the end of the drill rod close to the drill bit, and the liquid injection mechanism communicates with the liquid inlet hole.

[0007] Further, the drill bit is tubular, a plurality of tooth blocks are fixedly connected to the end of the drill bit away from the rotating rod, the plurality of tooth blocks are evenly distributed along the circumference of the drill rod, a crushing knife is fixedly connected inside the drill bit, and the crushing knife is ladder-shaped.

[0008] Further, the number of grooves is multiple, and the multiple grooves are evenly distributed around the drill rod.

[0009] Further, the liquid injection mechanism comprises a stirring barrel and a connecting pipe, the stirring barrel is provided with an inlet hole and an outlet hole, and the two ends of the connecting pipe communicate with the outlet hole and the liquid inlet hole, respectively.

[0010] Further, a rotating shaft is connected in the stirring barrel, a plurality of stirring rods are fixedly connected on the rotating shaft and are distributed along the length direction of the rotating shaft.

[0011] Further, a first motor is fixedly connected on the stirring barrel, and an output end of the first motor is fixedly connected with one end of the rotating shaft.

[0012] Further, a first negative pressure pump is installed on the stirring barrel, an output end of the first negative pressure pump is communicated with the connecting pipe, and an input end of the first negative pressure pump is communicated with the discharging hole.

[0013] A urease-based shaft excavation device comprises a urease-based shaft excavation drill and a mounting frame, a connecting rod is rotatably connected on the mounting frame, the connecting rod is detachably fixedly connected with a drill rod, a second motor for driving the connecting rod to rotate is installed on the mounting frame, and an output shaft of the second motor is in transmission connection with the connecting rod.

[0014] Further, a first gear is fixedly connected on the output shaft of the second motor, and a second gear meshing with the first gear is fixedly connected on the connecting rod.

[0015] Further, a second negative pressure pump is fixedly connected on the mounting frame, the connecting rod and the drill rod are both hollow structures, an input end of the second negative pressure pump is communicated with a conveying pipe, and one end of the conveying pipe is in rotational communication with the connecting rod.

[0016] The urease-based shaft excavation device has the advantages that:

[0017] The urease-based shaft excavation device and device make the drill rod and the drill bit vertically drill by rotating, the urease solution prepared in advance is injected into the liquid inlet hole through the liquid injection mechanism, and the urease solution flows out of the liquid outlet hole through the groove. Compared with the prior art, since the rotating rod rotates around the axial direction during the vertical drilling process, the urease solution can be uniformly applied to the cracks in the shaft sidewall during the vertical drilling process to block the cracks, the risk of water leakage of the shaft sidewall is reduced, and the problem that the crack blocking construction is difficult after water leakage is avoided to a certain extent. Moreover, as the urease solution is mixed and the reaction continuously proceeds, the calcium carbonate precipitate gradually increases, the calcium carbonate precipitate gathered can block the rock mass cracks, fine cracks are not easy to be generated, the strength, durability and frost resistance of the shaft wall rock mass are improved, and the water blocking effect is improved.

[0018] Other advantages, objects and features of the present application will be apparent to those skilled in the art from the following description, and will be learned from the practice of the present application, which will be apparent to those skilled in the art from the following description, or can be learned from the practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the utility model;

[0020] Figure 2 is a partial structural schematic diagram of the utility model Figure One ;

[0021] Figure 3 is a partial structural schematic diagram of the liquid injection mechanism of the utility model;

[0022] Figure 4 is a partial structural schematic diagram of the utility model Figure Two .

[0023] In the drawings:

[0024] 1, liquid injection mechanism; 101, stirring barrel; 102, feeding hole; 103, discharging hole; 104, rotating shaft; 105, stirring rod; 106, first motor; 107, first negative pressure pump; 108, connecting pipe;

[0025] 201, drill rod; 202, drill bit; 203, groove; 204, liquid inlet hole; 205, liquid outlet hole; 206, tooth block; 207, crushing knife;

[0026] 301, mounting frame; 302, connecting rod; 303, second motor; 304, first gear; 305, second gear; 306, second negative pressure pump; 307, conveying pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0029] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the above description of the utility model, it needs to be explained that the terms "one side", "the other side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the term "same" and the like do not mean that the components must be absolutely the same, but there can be slight differences. The term "vertical" only means that the positional relationship between the components is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0032] Please refer to Figures 1-4 The utility model provides a technical scheme: a vertical shaft excavation drill based on urease, including liquid injection mechanism 1 and drill rod 201 for injecting urease solution, one end of drill rod 201 is fixedly installed with drill bit 202, recess 203 is set up on the lateral wall of drill rod 201, recess 203 extends along the length direction of drill rod 201, liquid inlet hole 204 and multiple liquid outlet holes 205 that communicate with recess 203 are set up on the lateral wall of drill rod 201, liquid inlet hole 204 is located at the end of drill rod 201 away from drill bit 202, multiple liquid outlet holes 205 are distributed along the length direction of recess 203 and are located at the end of drill rod 201 close to drill bit 202, liquid injection mechanism 1 communicates with liquid inlet hole 204.

[0033] In the scheme: urease is small in size, good in water solubility, and has certain advantages for low-permeability well wall rock mass or microcracks. Urease solution is mixed by urease, urea, calcium chloride and pure water according to a specific ratio.

[0034] Working principle and use method:

[0035] Step one: make it vertical drilling by rotating drill rod 201 and drill bit 202.

[0036] Step two: inject the urease solution prepared in advance into liquid inlet hole 204 through liquid injection mechanism 1, and the urease solution flows through recess 203 and flows out from liquid outlet hole 205.

[0037] Compared with the prior art, since the rotating rod rotates around the axis direction during the vertical drilling process, the urease solution can be uniformly applied to the cracks in the shaft sidewall during the vertical drilling process, the risk of water leakage of the shaft sidewall is reduced, and the problem that the crack plugging construction is difficult after water leakage is avoided to a certain extent. Moreover, after the urease solution is mixed, the calcium carbonate precipitate gradually increases, the rock mass cracks can be plugged by the aggregation of the calcium carbonate precipitate, the fine cracks are not easy to be generated, the strength, durability and frost resistance of the shaft wall rock mass are improved, and the water plugging effect is improved.

[0038] In the embodiment, the drill bit 202 is tubular, a plurality of tooth blocks 206 are fixedly connected to one end of the drill bit 202 away from the rotating rod, the plurality of tooth blocks 206 are circumferentially distributed along the drill rod 201, a crushing cutter 207 is fixedly connected inside the drill bit 202, and the crushing cutter 207 is ladder-shaped.

[0039] In the scheme, the drill bit 202 is tubular, a plurality of tooth blocks 206 are fixedly connected to one end of the drill bit 202 away from the rotating rod, the plurality of tooth blocks 206 are circumferentially distributed along the drill rod 201, a crushing cutter 207 is fixedly connected inside the drill bit 202, and the crushing cutter 207 is ladder-shaped.

[0040] The plurality of tooth blocks 206 can cut soil or rock to accelerate the speed of vertical drilling. The crushing cutter 207 can crush the entering stones and soil inside the drill bit 202 to a certain extent.

[0041] In the embodiment, the number of the grooves 203 is multiple, and the multiple grooves 203 are circumferentially distributed along the drill rod 201.

[0042] In the scheme, the number of the grooves 203 is multiple, and the multiple grooves 203 are circumferentially distributed along the drill rod 201. The injection speed of the urease solution can be accelerated.

[0043] In the embodiment, the liquid injection mechanism 1 comprises a stirring barrel 101 and a connecting pipe 108, the stirring barrel 101 is provided with a feeding hole 102 and a discharging hole 103, and the two ends of the connecting pipe 108 are in communication with the discharging hole 103 and the liquid inlet hole 204 respectively.

[0044] In the scheme, the feeding hole 102 and the discharging hole 103 are arranged on the stirring barrel 101, and the two ends of the connecting pipe 108 are in communication with the discharging hole 103 and the liquid inlet hole 204 respectively.

[0045] The urease, urea, calcium chloride and pure water are mixed in a specific proportion, poured into the stirring barrel 101 through the feeding hole 102, and applied to the shaft sidewall through the discharging hole 103, the connecting pipe 108, the liquid inlet hole 204, the groove 203 and the liquid outlet hole 205.

[0046] In the embodiment, the stirring barrel 101 is rotationally connected with a rotating shaft 104, a plurality of stirring rods 105 are fixedly connected with the rotating shaft 104, and the plurality of stirring rods 105 are uniformly distributed along the length direction of the rotating shaft 104.

[0047] In the scheme, the stirring barrel 101 is rotationally connected with the rotating shaft 104, the plurality of stirring rods 105 are fixedly connected with the rotating shaft 104, and the plurality of stirring rods 105 are uniformly distributed along the length direction of the rotating shaft 104. Urease, urea, calcium chloride and pure water are poured into the stirring barrel 101 through the feeding hole 102 according to a specific ratio, the rotating shaft 104 rotates around its axis direction, and the plurality of stirring rods 105 rotate, so that the urease solution can be stirred more uniformly.

[0048] In the embodiment, a first motor 106 is fixedly connected with the stirring barrel 101, and an output end of the first motor 106 is fixedly connected with one end of the rotating shaft 104.

[0049] In the scheme, the first motor 106 is fixedly connected with the stirring barrel 101, and the output end of the first motor 106 is fixedly connected with one end of the rotating shaft 104. A controller is electrically connected with the first motor 106, the controller controls the output shaft of the first motor 106 to rotate, drives the rotating shaft 104 to rotate around its axis direction, and the plurality of stirring rods 105 rotate, so that the urease solution can be stirred more uniformly.

[0050] In the embodiment, a first negative pressure pump 107 is installed on the stirring barrel 101, an output end of the first negative pressure pump 107 is in communication with a connecting pipe 108, and an input end of the first negative pressure pump 107 is in communication with the discharging hole 103.

[0051] In the scheme, the first negative pressure pump 107 is installed on the stirring barrel 101, the output end of the first negative pressure pump 107 is in communication with the connecting pipe 108, and the input end of the first negative pressure pump 107 is in communication with the discharging hole 103. The negative pressure pump is electrically connected with the controller, the controller controls the negative pressure pump to operate, and the flow speed of the urease solution is accelerated.

[0052] A shaft excavation device based on urease comprises a shaft excavation drill based on urease and a mounting frame 301, a connecting rod 302 is rotationally connected with the mounting frame 301, the connecting rod 302 is detachably fixedly connected with a drill rod 201, a second motor 303 for driving the connecting rod 302 to rotate is installed on the mounting frame 301, and an output shaft of the second motor 303 is in transmission connection with the connecting rod 302.

[0053] In the scheme, the connecting rod 302 is rotatably connected to the mounting frame 301, the connecting rod 302 is detachably fixedly connected with the drill rod 201, the second motor 303 for driving the connecting rod 302 to rotate is installed on the mounting frame 301, and the output shaft of the second motor 303 is in transmission connection with the connecting rod 302. The second motor 303 is electrically connected with the controller, the controller controls the output shaft of the second motor 303 to rotate, drives the connecting rod 302 and the drill rod 201 to rotate, pushes the mounting frame 301 to move vertically, and realizes vertical drilling.

[0054] In the embodiment, the first gear 304 is fixedly connected to the output shaft of the second motor 303, and the second gear 305 meshing with the first gear 304 is fixedly connected to the connecting rod 302.

[0055] In the scheme, the first gear 304 is fixedly connected to the output shaft of the second motor 303, and the second gear 305 meshing with the first gear 304 is fixedly connected to the connecting rod 302. The controller controls the output shaft of the first motor 106 to rotate and drives the first gear 304 to rotate, drives the second gear 305, the connecting rod 302 and the drill rod 201 to rotate.

[0056] In the embodiment, the second negative pressure pump 306 is fixedly connected to the mounting frame 301, the connecting rod 302 and the drill rod 201 are both hollow structures, the input end of the second negative pressure pump 306 is communicated with the conveying pipe 307, and one end of the conveying pipe 307 is in rotational communication with the connecting rod 302.

[0057] In the scheme, the second negative pressure pump 306 is fixedly connected to the mounting frame 301, the connecting rod 302 and the drill rod 201 are both hollow structures, the input end of the second negative pressure pump 306 is communicated with the conveying pipe 307, and one end of the conveying pipe 307 is in rotational communication with the connecting rod 302. The second negative pressure pump 306 is electrically connected with the controller, the controller controls the second negative pressure pump 306 to operate, and the soil or the broken stone crushed by the drill bit 202 is conveyed out through the connecting pipe 108, the drill rod 201 and the conveying pipe 307 under the suction force of the second negative pressure pump 306, so that the efficiency of drilling is improved.

[0058] The model of the first motor 106 is 1FK7042-2AF71-1 RG1, the model of the first negative pressure pump 107 is DLP200BLDC, the model of the second motor 303 is 1FK7042-2AF71-1 RG1, the model of the second negative pressure pump 306 is DLP200BLDC, and the model of the controller is JR-02S.

[0059] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. A urease-based shaft excavation drill, comprising a liquid injection mechanism (1) for injecting a urease solution and a drill rod (201), one end of the drill rod (201) being fixedly installed with a drill bit (202), characterized in that: The side wall of the drill rod (201) is provided with a groove (203) extending along the length direction of the drill rod (201), the side wall of the drill rod (201) is provided with a liquid inlet hole (204) and a plurality of liquid outlet holes (205) in communication with the groove (203), the liquid inlet hole (204) is located at one end of the drill rod (201) away from the drill bit (202), and the plurality of liquid outlet holes (205) are distributed along the length direction of the groove (203) and located at one end of the drill rod (201) close to the drill bit (202), and the liquid injection mechanism (1) is in communication with the liquid inlet hole (204).

2. The urease-based shaft excavation drill of claim 1, wherein: The drill bit (202) is tubular, a plurality of tooth blocks (206) are fixedly connected to one end of the drill bit (202) away from the rotating rod, the plurality of tooth blocks (206) are evenly distributed in the circumferential direction of the drill rod (201), and a crushing knife (207) is fixedly connected inside the drill bit (202), wherein the crushing knife (207) is ladder-shaped.

3. The urease-based shaft excavation drill of claim 1, wherein: The number of the grooves (203) is multiple, and the multiple grooves (203) are evenly distributed in the circumferential direction of the drill rod (201).

4. The urease-based shaft excavation drill of claim 1, wherein: The liquid injection mechanism (1) comprises a stirring barrel (101) and a connecting pipe (108), the stirring barrel (101) is provided with a feeding hole (102) and a discharging hole (103), and the two ends of the connecting pipe (108) are in communication with the discharging hole (103) and the liquid inlet hole (204), respectively.

5. The urease-based shaft excavation drill of claim 4, wherein: A rotating shaft (104) is rotatably connected in the stirring barrel (101), a plurality of stirring rods (105) are fixedly connected to the rotating shaft (104), and the plurality of stirring rods (105) are evenly distributed along the length direction of the rotating shaft (104).

6. The urease-based shaft excavation drill of claim 5, wherein: A first motor (106) is fixedly connected to the stirring barrel (101), and an output end of the first motor (106) is fixedly connected to one end of the rotating shaft (104).

7. The urease-based shaft excavation drill of claim 4, wherein: A first negative pressure pump (107) is installed on the stirring barrel (101), an output end of the first negative pressure pump (107) is in communication with the connecting pipe (108), and an input end of the first negative pressure pump (107) is in communication with the discharging hole (103).

8. A urease-based shaft excavation apparatus, characterized by: The urease-based shaft excavation drill as claimed in claim 1 and a mounting frame (301), the mounting frame (301) is rotatably connected with a connecting rod (302), the connecting rod (302) is detachably fixedly connected with the drill rod (201), a second motor (303) is installed on the mounting frame (301) to drive the connecting rod (302) to rotate, and an output shaft of the second motor (303) is in transmission connection with the connecting rod (302).

9. The urease-based shaft excavation apparatus of claim 8, wherein: A first gear (304) is fixedly connected to the output shaft of the second motor (303), and a second gear (305) is fixedly connected to the connecting rod (302) and in meshing connection with the first gear (304).

10. The urease-based shaft excavation device of claim 8, wherein: A second negative pressure pump (306) is fixedly connected to the mounting frame (301), the connecting rod (302) and the drill rod (201) are both hollow structures, an input end of the second negative pressure pump (306) is in communication with a conveying pipe (307), and one end of the conveying pipe (307) is in rotational communication with the connecting rod (302).

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