CN220059436U - Turbine type double-spring clamp rope coring down-the-hole hammer for directional drilling of hard rock - Google Patents

Abstract

The utility model relates to a turbine type double-spring clamp rope coring down-the-hole hammer for directional drilling of hard rock, which comprises a double-spring clamp rope mechanism, a turbine type down-the-hole hammer and a coring inner pipe, wherein the turbine type double-spring clamp rope coring down-the-hole hammer comprises a main shaft and a main shaft; the double-spring clamping rope mechanism is positioned at the inner upper part of the outer tube, and a drill bit is arranged at the tail end of the lower part of the outer tube; the double-spring clamping rope mechanism is connected with one end of a turbine of the turbine type down-the-hole hammer through a movable joint and a bearing, and the other end of the turbine type down-the-hole hammer is connected with the inner pipe through a joint; the turbine comprises a plurality of rotors, the length of the rotors is smaller than the distance from the outer circle of the rotating shaft to the inner wall of the outer tube, the rotors are staggered and arranged at intervals in the axial direction of the outer tube, and the rotors are arranged at intervals in the cross section direction of the outer tube so as to form an airflow channel; when the air flow passes through the air flow channel, the force applied to the rotor drives the rotor to rotate, so that the rotating shaft and the pneumatic down-the-hole hammer and the coring inner tube are driven to rotate. The utility model can improve the working reliability of the coring inner pipe and avoid the phenomena of drill fracture, impact and the like caused by torque provided by the drill rod by the existing drill.

Description

Turbine type double-spring clamp rope coring down-the-hole hammer for directional drilling of hard rock

Technical Field

The utility model belongs to the technical field of exploration equipment, and relates to special equipment for mountain tunnel exploration and submarine tunnel exploration, in particular to a turbine type double-spring-clip rope coring down-the-hole hammer for directional drilling of hard rock.

Background

The horizontal directional drilling technology can make up for the defect of the conventional vertical drilling of a hole, well solves the geological investigation problem of difficult mountain areas and submarine tunnel engineering, and can improve the single-hole radiation area by adjusting the drilling track of the exploration coring hole. The construction long-distance horizontal drilling can solve the problem that the construction of a plurality of vertical drilling holes is replaced at one construction site, the track of the horizontal well runs along the tunnel, the solidity of drilling investigation information is ensured, the geological condition in the tunnel can be reflected more truly, and detailed geological information is provided for tunnel design and construction. If the submarine tunnel is drilled to the vicinity of the tunnel body by arranging directional geological drilling equipment on islands along the line, adjusting the drilling direction, and performing long-distance horizontal geological drilling along the trend of the tunnel so as to find out the surrounding rock condition of the tunnel body section of the submarine tunnel of the strait channel. Directional drilling tunnel hole investigation is difficult to construct when encountering the following strata, (1) non-cemented gravel layer and boulder in the fourth series stratum; (2) various types of non-weathered and slightly to moderately weathered formations.

The track of directional drilling for tunnel investigation is composed of curve-straight line-curve, the hardness of rock is high, plastic deformation is very small or very little, the drill rod bears bending fatigue load when pushing and pulling and rotating in the bending drilling hole, and vibration and impact load generated by friction of drill bit broken rock, drilling tool and hard rock hole wall are borne. The horizontal directional drill rod bears complex alternating loads such as pressure, pulling, torsion, bending, vibration and the like in a three-dimensional space, and the horizontal directional drill rod can be broken at a stress concentration position of the drill rod after a period of time due to the actions such as abrasion and corrosion.

In order to obtain a true and reliable core, the rope core drill has great effect in deep hole geological exploration drilling due to avoiding frequent lifting, has higher drilling speed and good economical efficiency, but the conventional rope core drill is provided with the bit required by a drill rod, is easy to be blocked and cannot be salvaged in the drilling process, and the salvaged steel wire rope is easy to be broken in the drill rod or outside the drill rod due to strong salvaging, so that the drilling efficiency is greatly influenced, and the drilling tool needs to be subjected to deviation correction and direction control, so that the investigation efficiency is greatly reduced; on the other hand, drilling fluid is easy to run off during horizontal drilling, so that drilling sticking, drilling burning and sealing are worn rapidly, cores are easy to break away and pollute, coring rate and lithology judgment are affected, and in a water-deficient mountain tunnel area, the drilling fluid is difficult to configure and high in cost.

Aiming at the technical problem of directional drilling, a great deal of effort and financial resources are invested in various countries to study and apply, and certain achievements and application effects are achieved. The technical means commonly used in the aspect of directional drilling at present are as follows: (1) the corresponding mud preparation, circulation and purification equipment is added by using a hole bottom mud motor, a mud pump with larger capacity and a drill rod with larger inner diameter are configured, but more funds are spent on site for consumption of mud materials and waste mud disposal, and the whole equipment occupies larger space, has high cost, short service life and large deflecting radius; (2) the double-pipe drilling and the common eccentric drill bit are adopted, the double-pipe drilling needs a special concentric double-output shaft drilling machine, the cost of the drilling machine is high, the abrasion of a drill rod is serious, and the rock crushing efficiency is extremely low; (3) the dry type operation rock drilling system is adopted, air is adopted as a circulating medium, and the pneumatic down-the-hole hammer is adopted as main rock crushing power, and the method is mainly characterized in that compressed air is adopted as power, so that the chemical pollution is small, the environmental protection advantage is strong, and the rock breaking efficiency is highest; as the air is used as a flushing medium, the method saves about 25 percent of cost compared with slurry wall-protecting drilling, but has difficult orientation and is easy to be blocked when the hammer head impacts.

In summary, a set of drilling tool is required to be designed, the directional drilling can be performed by utilizing the advantage of the high broken rock of the pneumatic down-the-hole hammer, the hammer head of the down-the-hole hammer cannot be blocked, the fatigue damage of a drill rod can be avoided, and the service life of the drill rod is prolonged.

Disclosure of Invention

The turbine type double-spring clamp rope coring down-the-hole hammer for directional drilling of hard rock can greatly improve the working reliability of a rope coring inner pipe assembly, is beneficial to improving the drilling efficiency, has an idle-drilling prevention function, effectively avoids the occurrence of accidents in holes and is beneficial to drilling deep holes and ultra-deep holes.

The utility model comprises the following technical scheme:

a turbine type double-spring clamp rope coring down-the-hole hammer for directional drilling of hard rock comprises a double-spring clamp rope mechanism, a turbine type down-the-hole hammer and a coring inner pipe; the double-spring clamping rope mechanism is positioned at the inner upper part of the outer tube, and a drill bit is arranged at the tail end of the lower part of the outer tube; the double-spring clamping rope mechanism is connected with one end of a turbine of the turbine type down-the-hole hammer through a movable joint and a bearing, and the other end of the turbine type down-the-hole hammer is connected with the inner pipe through a joint; the turbine comprises a plurality of rotors, the length of the rotors is smaller than the distance from the outer circle of the rotating shaft to the inner wall of the outer tube, the rotors are staggered and arranged at intervals in the axial direction of the outer tube, and the rotors are arranged at intervals in the cross section direction of the outer tube so as to form an airflow channel; when the air flow passes through the air flow channel, the force applied to the rotor drives the rotor to rotate, so that the rotating shaft and the pneumatic down-the-hole hammer as well as the coring inner tube are driven to rotate.

The drill rod is not adopted to connect the drill bit, so that the drill rod is not required to drive the impact head to rotate, the drilling tool is not required to be controlled to correct the deviation, and the investigation efficiency is improved.

Further, the double-spring-card rope mechanism comprises an upper spring card and a lower spring card; the upper spring clip is arranged in a spring clip groove of the upper spring clip seat, and the lower spring clip is arranged in a spring clip groove in the lower spring clip sleeve; the upper elastic clamp and the lower elastic clamp are respectively hinged with the upper elastic clamp seat and the lower elastic clamp sleeve through an upper elastic clamp elastic pin and a lower elastic clamp elastic pin; the inner sides of the upper spring clamp and the lower spring clamp are provided with tension springs, and the tension springs can extend out of the spring clamp grooves under the tension action of the tension springs; the outer sides of the upper spring card and the lower spring card are inclined planes, and the two sides of the recovery blocking card are provided with sheet-shaped double wings for gathering the spring cards.

The double wings of the recovery blocking card and the upper spring card are arranged in the same spring card slot, and a certain free movement distance can be provided in the spring card slot; under the action of the return spring and the dead weight, the recovery blocking card is in a lower position, and the upper spring card is in a maximum free stretching state. When the two wings of the recovery blocking clip are contacted with the inclined plane of the spring clip, the upper spring clip starts to be folded until the limit of the spring clip is released, and the inner pipe assembly can be salvaged by continuously pulling the salvaging spearhead. Under the action of the return spring and the dead weight, the recovery blocking card returns to the lower position and is separated from the upper spring card, and the upper spring card is in the maximum free stretching state.

The elastic clip is arranged to prevent the coring inner tube from rising due to the upward pushing force when the core enters the inner tube or the elastic force when the impactor works. The lower spring clip is arranged, firstly, when the drilling tool is in a lifting drilling state, the impact device and the whole coring inner tube are hung to enable a piston impact hammer in the impact device to be separated from a piston, so that the impact device does not work, and a hole is punched before drilling; secondly, when the impactor is detached to carry out wire core taking rotary drilling, the lower spring clip is used as a hanging mechanism of the core taking inner tube. The double-spring-clip structural mode is adopted in the scheme, so that the working reliability of the rope coring inner pipe assembly can be greatly improved, the drilling efficiency is improved, the matched impactor has an idle-beating prevention function, accidents in holes are effectively avoided, and drilling of deep holes and ultra-deep holes is facilitated. The upper elastic clamping elastic pin and the lower elastic clamping elastic pin in the scheme do not bear shearing force, so that wearing parts are reduced, the service life of the wire coring inner tube is prolonged, and the safety and reliability of the wire coring inner tube are also improved.

Further, the upper end of the double-elastic clamping rope mechanism is provided with a spear, the lower part of the spear is hinged with the upper part of a spear rotating shaft, the spear can freely rotate, and a taper shaft locating pin is arranged in the spear rotating shaft; the upper spring clamping seat is in a circular tube shape, spring clamping grooves are arranged on the circumference of the upper spring clamping seat, and an inner hole of the upper spring clamping seat is in clearance fit with the fishing spear rotating shaft and the force transmission shaft; the fishing spear rotating shaft and the force transmission shaft can move in the inner hole of the upper spring clamping seat, and the recovery blocking clamp can slide in the spring clamping groove.

Further, the bottom of the spear rotating shaft is provided with a lifting sleeve, an in-place alarm ring is arranged in the lifting sleeve, and an end cover is arranged at the bottom of the lifting sleeve.

Further, an outer cylinder and an inner cylinder of the pneumatic down-the-hole hammer are arranged below the turbine, an impact head is arranged below the outer cylinder, a check valve is arranged in the upper end of the outer cylinder, a gas distribution rod is arranged below the check valve, and a spring is arranged at the top of the gas distribution rod.

Further, when the drilling tool is in a lifting state, the impact head is provided with a shaft with a spline (or a hexagon), the impact head is hung on the lower joint of the outer cylinder through the round key, the piston falls down and presses on the impact head, and the third air inlet hole of the inner cylinder is positioned in the upper cavity of the piston; the compressed air pushes up the check valve, enters the upper cavity of the piston from the third air inlet hole through the first air inlet hole, the second air inlet hole and the annular air passage between the inner cylinder and the outer cylinder, and then directly reaches the hole bottom blowing hole through the central holes of the piston and the impact head to discharge powder. The pneumatic mode also avoids the possibility of the piston working when the impact head is suspended, namely, the phenomenon of idle striking is prevented.

Further, the impact stroke and the return stroke of the piston are subjected to three stages of air intake, air compression expansion and piston freewheeling, but the running lengths of the stages are different. In order to obtain a large impact work, it is necessary to ensure a sufficient intake length in the impact stroke.

Further, when the impact head is pressed on the hole bottom to drill, the impact head and the piston move upwards relative to the inner cylinder and the outer cylinder, the third air inlet is communicated with the lower cavity of the piston, at the moment, compressed air entering the first air inlet is directly blown to the hole bottom through the throttle hole of the air distribution rod, the piston and the central channel of the impact head, and is directly used for flushing rock debris at the hole bottom to form a direct blowing powder discharge air channel; the other way is that a large amount of compressed air entering the first air inlet enters the lower cavity of the piston through the second air inlet, the annular air passage and the third air inlet, and the compressed air pushes the piston to accelerate upward, which is an air inlet stage; when the piston moves up a certain distance, the gas path entering the lower cavity is cut off by the sealing surface in the middle of the piston, and at the moment, the lower cavity is still a closed cavity, so that the high-pressure gas entering the lower cavity expands to do work, and the piston is continuously pushed to move up, and the stage is the gas compression expansion stage; after the piston continues to move upwards for a certain distance, the compressed air of the lower cavity enters the central hole and the hole bottom of the impact head through the exhaust hole to relieve pressure, and the piston which obtains certain kinetic energy still continues to move upwards by reliable inertia at the moment, namely the piston freewheeling stage.

Before the piston moves upwards inertially, the air distribution rod is inserted into the central hole of the piston to form a closed upper cavity, and the sealing of the upper sealing surface of the piston is released when appropriate, so that compressed air enters the upper cavity through the third air inlet hole. The rising of the air pressure of the upper cavity forces the piston to move upwards to stop, and then the air inlet pushes the piston to accelerate downwards, namely an air inlet stage; when the upper sealing surface of the piston enters the seal, the air inlet channel is cut off, and the piston expands and works by the high-pressure air entering the sealed upper cavity to push the piston to continue descending (namely, the air compression expansion stage); when the upper end of the piston is separated from the gas distribution rod, the pressurized gas of the upper cavity is discharged to the bottom of the hole through the piston and the central hole of the impact head, the pressure is reduced, and the piston continues to descend by inertia to impact the tail part of the head (namely, the piston freewheeling stage). Just as the piston inertially descends the impact head, its lower chamber has begun to intake air, building up pressure. Once the impact is over, the compressed air pushes the hammer upwards, and the hammer is repeatedly started to generate continuous impact.

Further, an inner pipe joint is arranged in the upper end of the inner pipe, a ball valve seat is arranged above the inner pipe joint, and a steel ball is arranged in the ball valve seat; a guide ring is arranged between the inner tube and the outer tube, a drill bit is arranged at the tail end of the inner tube, and a clamp spring is arranged at the center of the drill bit through a clamp spring seat.

Further, the upper spring clip and the lower spring clip are of a bidirectional limiting spring clip structure or a unidirectional limiting hanging spring clip structure.

The utility model has the advantages and positive effects that:

1. the double-spring clamping rope mechanism is connected with one end of a turbine of the turbine type down-the-hole hammer through the movable joint and the bearing, and the other end of the turbine type down-the-hole hammer is connected with the inner pipe through the joint; the drill bit is not connected by the drill rod, so that the drill rod is not required to drive the impact head to rotate, the drilling tool is not required to be controlled to perform deviation correction work, and the investigation efficiency is improved.

2. The utility model cancels a complex air distribution mechanism, replaces a simple air distribution air path, directly blows air by compressed air and has small air pressure loss; the compressed gas is utilized to expand and apply work, so that the air consumption of the down-the-hole hammer is greatly reduced.

3. The double-spring-clip type rope coring inner pipe assembly has the advantages that the double-spring-clip type rope coring inner pipe assembly can greatly improve the working reliability of the rope coring inner pipe assembly, is beneficial to improving the drilling efficiency, has the function of preventing idle drilling by a matched impactor, effectively avoids accidents in holes, and is beneficial to drilling deep holes and ultra-deep holes.

4. The upper elastic clamping elastic pin and the lower elastic clamping elastic pin in the utility model are not subjected to shearing force, so that the number of wearing parts is reduced, and the service life of the wire coring inner tube and the safety and reliability of the coring inner tube are improved.

5. According to the utility model, through the release of the air pressure energy of the internal circulation reciprocation of the down-the-hole hammer, the impact force of the core drill is greatly enhanced, and the impact force attenuation of the down-the-hole hammer after the elasticity of the hammer spring and the valve spring is reduced is avoided; meanwhile, the utility model realizes the rotation of the drill bit and the coring inner tube, and avoids the phenomena of drill fracture, impact and the like caused by torque provided by the drill rod by the existing drilling tool.

6. The utility model is suitable for directional core drilling, does not need to propose the whole drill stem, solves the problem of low drilling speed in complex sandstone stratum or hard broken geologic body, and can greatly save labor force.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of a dual spring card mechanism;

FIG. 3 is a schematic structural view of a turbine down-the-hole hammer;

FIG. 4 is a schematic structural view of the coring inner tube;

in the figure, 1-a spearhead is fished; 2-a spear rotating shaft; 3-taper shaft locating pins; 4-lifting the sleeve; 5-loading the clamping seat; 6-a force transmission shaft; 7-a clamp plate spring; 8-loading a card; 9-ejecting the sleeve;

10-an outer tube; 101-the upper part of the card ejection chamber; 102-the lower part of the card ejection chamber; 11-ejecting the card; 12-connecting pipes; 13-a turbine; 14-check valve; 15-a first air inlet; 16-a second air inlet; 17-annular airway;

18-an inner cylinder; 19-an outer cylinder; 20-exhaust holes; 21-an inner tube fitting; 22-a pilot ring;

23-an inner tube; 24-drill bit; 25-snap springs; 26-a clamping spring seat; 27-a jump ring baffle ring; 28-ball valve seat; 29-steel ball; 30-linker; 31-an impact head; 32-round keys; 33-a piston;

34-a third air inlet; 35-a gas distribution rod; 36-a spring; 37-bearings; 38-movable joint; 39-a lower spring clip spring pin; 40-recovering the blocking card; 41-spring-up snap-in elastic pins; 42-loading a clamping tension spring; 43-end cap; 44-an in-place alarm ring; 45-lower spring clip.

Detailed Description

In order to further disclose the inventive aspects, features and advantages of the present utility model, the following examples are set forth in detail below with reference to the accompanying drawings.

Examples: referring to fig. 1-4, a turbine type double-spring clamp rope coring down-the-hole hammer for directional drilling of hard rock comprises a double-spring clamp rope mechanism, a turbine type down-the-hole hammer and a coring inner pipe; the double-spring clamping rope mechanism is positioned at the inner upper part of the outer tube 10, and a drill bit 24 is arranged at the tail end of the lower part of the outer tube 10; the double-spring clamping rope mechanism is connected with one end of a turbine 13 of the turbine type down-the-hole hammer through a movable joint 38 and a bearing 37, the movable joint 38 is fixedly arranged at the bottom of the connecting pipe 12, and the other end of the turbine type down-the-hole hammer is connected with the inner pipe 23 through a joint 30; the turbine 13 includes a plurality of rotors, the length of the rotors is smaller than the distance from the outer circle of the rotating shaft to the inner wall of the outer tube 10, the rotors are staggered and spaced in the axial direction of the outer tube 10, and the rotors are spaced in the cross section direction of the outer tube 10 to form an airflow channel; when the air flow passes through the air flow channel, the force applied to the rotor drives the rotor to rotate, so that the rotating shaft and the pneumatic down-the-hole hammer and the coring inner tube are driven to rotate.

As shown in fig. 2, the double-spring-card rope mechanism comprises an upper spring card 8 and a lower spring card 11; the upper spring card 8 and the lower spring card 11 are of a bidirectional limiting spring card structure or a unidirectional limiting hanging spring card structure. The upper spring clip 8 is arranged in a spring clip groove of the upper spring clip seat 5, a clip board spring 7 is arranged at the top of the upper spring clip 8, and the lower spring clip 11 is arranged in a spring clip groove in the lower spring clip sleeve 9; the upper spring clamp 8 and the lower spring clamp 11 are respectively hinged with the upper spring clamp seat 5 and the lower spring clamp sleeve 9 through an upper spring clamp elastic pin 41 and a lower spring clamp elastic pin 39; the spring is installed on the inner sides of the upper spring card 8 and the lower spring card 11, and both can extend out of the spring card slot under the tension action of the spring (the spring on the upper spring card 8 is an upper spring card spring 42, and the spring on the lower spring card 11 is a lower spring card spring 45); the outer sides of the upper spring card 8 and the lower spring card 11 are inclined planes, and the upper spring card 8 and the lower spring card 11 are axisymmetric relative to the recovery blocking card 40; the two sides of the recovery blocking card 40 are provided with sheet double wings for collecting the elastic card, round holes at the two ends of the recovery blocking card 40 are respectively sleeved on the force transmission shafts 6, and the force transmission shafts 6 at the two ends are respectively provided with an upper elastic card elastic pin 41 and a lower elastic card elastic pin 39.

The double wings of the recovery blocking card 40 and the upper spring card 8 are arranged in the same spring card slot, and a certain free movement distance can be provided in the spring card slot; under the action of the return spring and the dead weight, the recovery blocking card is in the lower position, and the upper spring card 8 is in the maximum free stretching state. When the two wings of the recovery blocking card 40 are contacted with the spring card inclined surfaces, the upper spring card 8 starts to be folded until the limit of the spring card is released, and the inner pipe 23 assembly can be salvaged by continuously lifting the spearhead 1. Under the action of the return spring and the dead weight, the recovery blocking card 40 returns to the lower position and is separated from the loading card 8, and the loading card 8 is in the maximum free stretching state.

The spring-up clip 8 is provided so that the coring inner tube does not rise due to the upward force of the core when it enters the inner tube 23 or the repulsive force of the impactor when it is in operation. The lower spring clamp 11 is arranged, firstly, when the drilling tool is in a lifting state, the impact device and the whole coring inner tube are hung to enable a piston impact hammer in the impact device to be separated from a piston, so that the impact device does not work, and a hole is punched before drilling; secondly, when the impactor is detached to carry out wire core taking rotary drilling, the lower spring clamp 11 is used as a hanging mechanism of the core taking inner tube. The double-spring-clip structural mode is adopted in the scheme, so that the working reliability of the rope coring inner pipe assembly can be greatly improved, the drilling efficiency is improved, the matched impactor has an idle-beating prevention function, accidents in holes are effectively avoided, and drilling of deep holes and ultra-deep holes is facilitated. The upper elastic clamping elastic pin 41 and the lower elastic clamping elastic pin 39 in the scheme are not subjected to shearing force, so that wearing parts are reduced, the service life of the rope coring inner tube is prolonged, and the safety and reliability of the rope coring inner tube are also improved.

The upper end of the double-spring clamping rope mechanism is provided with a spear-picking head 1, the lower part of the spear-picking head 1 is hinged with the upper part of a spear-picking rotating shaft 2, the spear-picking head 1 can freely rotate, and a taper shaft positioning pin 45 is arranged in the spear-picking rotating shaft 2; the upper spring clamping seat 5 is in a circular tube shape, spring clamping grooves are arranged on the circumference of the upper spring clamping seat, and an inner hole of the upper spring clamping seat 5 is in clearance fit with the fishing spear rotating shaft 2 and the force transmission shaft 6; the fishing spear rotating shaft 2 and the force transmission shaft 6 can move in the inner hole of the upper bullet clamping seat 5, and the recovery blocking card 40 can slide in the bullet clamping groove. The bottom of the spear rotating shaft 2 is provided with a lifting sleeve 4, an in-place alarm ring 44 is arranged in the lifting sleeve 4, and the bottom of the lifting sleeve 4 is provided with an end cover 43.

As shown in fig. 3, an outer cylinder 19 and an inner cylinder 18 of the pneumatic down-the-hole hammer are arranged below the turbine, an impact head 31 is arranged below the outer cylinder 19, a check valve 14 is arranged inside the upper end of the outer cylinder 19, a gas distribution rod 35 is arranged below the check valve 14, and a spring 36 is arranged at the top of the gas distribution rod 35; when the drilling tool is in a lifting state, the impact head 31 is provided with a shaft with a spline (or a hexagon), the impact head 31 is hung on a lower joint of the outer cylinder 19 through a round key 32, at the moment, the piston 33 falls down and presses on the impact head 31, and a third air inlet hole 34 of the inner cylinder 18 is positioned in an upper cavity of the piston 33; the compressed air pushes up the check valve 14, enters the upper cavity of the piston 33 from the third air inlet hole 34 through the first air inlet hole 15, the second air inlet hole 16 and the annular air passage 17 between the inner cylinder and the outer cylinder, and then directly reaches the hole bottom blowing hole through the central holes of the piston 33 and the impact head 31 to discharge powder. The pneumatic way also avoids the possibility of the piston 33 working when the impact head 31 is suspended, i.e. the occurrence of the idle striking phenomenon.

The stroke and return stroke of the piston 33 are each subjected to three phases of intake, expansion by compression and freewheeling, but the length of travel of each phase is different. In order to obtain a large impact work, it is necessary to ensure a sufficient intake length in the impact stroke.

When the impact head 31 is pressed on the hole bottom to drill, the impact head 31 and the piston 33 move upwards relative to the inner cylinder 18 and the outer cylinder 19, the third air inlet 34 is communicated with the lower cavity of the piston 33, at the moment, compressed air entering the first air inlet 15 directly reaches the hole bottom through the throttle hole of the air distribution rod 35, the piston 33 and the central channel of the impact head 31, and is directly used for flushing rock debris at the hole bottom to be a direct blowing powder discharge air path; the other way is that a large amount of compressed air entering the first air inlet hole 15 enters the lower cavity of the piston 33 through the second air inlet hole 16, the annular air passage 17 and the third air inlet hole 34, and the compressed air pushes the piston 33 to accelerate upwards, which is an air inlet stage; when the piston 33 moves upwards for a certain distance, the air passage entering the lower cavity is cut off by the sealing surface in the middle of the piston 33, and at the moment, the lower cavity is still a closed cavity, so that high-pressure air entering the lower cavity expands to do work, and the piston 33 is continuously pushed to move upwards, and the stage is the air compression expansion stage; after the piston 33 continues to move upwards for a certain distance, the pressure of the lower cavity enters the central hole and the bottom of the impact head 31 through the exhaust hole 20 to relieve the pressure, and the piston 33 which has obtained a certain kinetic energy still continues to move upwards by reliable inertia at the moment, namely, the piston freewheeling stage.

Before the piston 33 moves upwards inertially, the air distribution rod 35 is inserted into the central hole of the piston 33 to form a closed upper cavity, and the sealing of the upper sealing surface of the piston 33 is released when appropriate, so that compressed air enters the upper cavity through the third air inlet hole 34. The rising of the air pressure of the upper cavity forces the piston 33 to move upwards to stop, and then the air inlet pushes the piston 33 to accelerate downwards, namely an air inlet stage; when the upper sealing surface of the piston 33 enters the seal, the air inlet channel is cut off, and the piston 33 expands and works by the high-pressure air entering the sealed upper cavity to push the piston to continue descending (namely, the air compression expansion stage); when the upper end of the piston 33 is separated from the gas distribution rod 35, the pressurized gas of the upper cavity is discharged to the bottom of the hole through the central holes of the piston 33 and the impact head 31, the pressure is reduced, and the piston 33 continues to descend the tail part of the impact head 31 by inertia (namely, the piston freewheeling stage). Just as the piston 33 inertially descends the impact head 31, its lower chamber has begun to intake air, building up pressure. Once the impact is over, the compressed air pushes the hammer upwards, and the hammer is repeatedly started to generate continuous impact.

As shown in fig. 4, an inner pipe joint 21 is arranged in the upper end of the inner pipe 23, a ball valve seat 28 is arranged above the inner pipe joint 21, and a steel ball 29 is arranged in the ball valve seat 28; a guide ring 22 is arranged between the inner tube 23 and the outer tube 10, a drill bit 24 is arranged at the tail end of the inner tube 23, and a clamp spring 25 is arranged at the center of the drill bit 24 through a clamp spring seat 26.

The working flow is as follows: the drilling method using the down-the-hole hammer comprises the following steps: connecting a steel wire rope connected to a winch to a fishing spearhead 1 through a rotary joint, screwing the rotary joint to an outer pipe 10, introducing compressed air from the rotary joint, pushing a turbine type double-spring clamp rope coring down-the-hole hammer to forward, and metering the feeding length of the steel wire rope; the down-the-hole hammer is decelerated until entering the hole bottom in a low-speed state, and when the speed of the steel wire rope is 0, the down-the-hole hammer is indicated to be in place; during coring, compressed air continuously enters the outer tube 10 through a rotary joint, energy in air supplied by a pneumatic press in a drilling process is utilized to directly drive a piston 33 (also called a hammer) in a pneumatic hammer to reciprocate up and down, a certain frequency impact load is continuously applied to the lower coring inner tube, and a turbine 13 assembly rotates to realize impact rotary drilling; a small amount of compressed air passes through the annular cavity gap between the outer wall of the inner pipe 23 and the inner wall of the outer pipe 10, reaches the rock breaking surface, and washes rock debris between the annular cavities; finally, the coring inner tube is pulled out to finish a directional drilling coring operation.

When the steel wire rope is put into the hole, the upper spring clip 8 and the lower spring clip 11 are abutted against the inner wall of the outer tube 10 to rapidly descend under the action of Zhang Huangzhang force, and are respectively put into the upper part 101 and the lower part 102 of the spring clip chamber of the outer tube 10; the upper spring clip 8 and the lower spring clip 11 extend to open to two sides and are respectively clamped on flanges of the upper part 101 of the spring clip chamber and the lower part 102 of the spring clip chamber, so that the inner pipe 23 assembly is prevented from moving upwards and downwards, and the inner pipe 23 assembly is suspended on the outer pipe 10; when the salvaging rock core is recovered, a salvaging device is put in and the salvaging spearhead 1 is lifted, the recovery retaining clip 40 slides upwards in the spring clip groove, when the inclined planes of the two wings of the recovery retaining clip are contacted with the inclined planes of the upper spring clip 8, the upper spring clip 8 is acted by the furling force of the upper spring clip, and the upper spring clip overcomes the tension of the spring and is furled from the flange in the spring clip chamber, so that the limit is cancelled; and the inner pipe 23 assembly and the core thereof can be lifted away from the hole bottom to the hole mouth by continuing to lift the fisher, so that the salvaging process is completed.

In the salvaging and recovering process, the force is transmitted from the salvaging device to the salvaging spearhead 1, and then sequentially to the salvaging spearhead rotating shaft 2, the force transmission shaft 6, the upper bullet clamping seat 5, the lower bullet clamping sleeve barrel 9 and the turbine type down-the-hole hammer until reaching the core barrel of the inner pipe 23. After the inner tube 23 assembly is put in place, the inner tube 23 assembly is hung by expanding the lower spring clip 11 in the spring clip chamber and propping against the flange in the spring clip chamber, and the whole weight of the inner tube 23 assembly is concentrated on the lower spring clip 11; the lower latch seat disposed at the rear side of the lower latch 11 can prevent the lower latch elastic pin 39 from receiving shearing force and impact force and from receiving the shearing force and contact impact force which would exist when the inner tube 23 assembly is put in place.

Although the preferred embodiments of the present utility model have been described, the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the appended claims. All of which are within the scope of the present utility model.

Claims (10)

1. The utility model provides a turbine formula double-bullet card rope coring down-the-hole hammer that directional drilling of hard rock, its characterized in that: comprises a double-spring clamping rope mechanism, a turbine type down-the-hole hammer and a coring inner pipe; the double-spring clamping rope mechanism is positioned at the inner upper part of the outer tube, and a drill bit is arranged at the tail end of the lower part of the outer tube; the double-spring clamping rope mechanism is connected with one end of a turbine of the turbine type down-the-hole hammer through a movable joint and a bearing, and the other end of the turbine type down-the-hole hammer is connected with the inner pipe through a joint; the turbine comprises a plurality of rotors, the length of the rotors is smaller than the distance from the outer circle of the rotating shaft to the inner wall of the outer tube, the rotors are staggered and arranged at intervals in the axial direction of the outer tube, and the rotors are arranged at intervals in the cross section direction of the outer tube so as to form an airflow channel; when the air flow passes through the air flow channel, the force applied to the rotor drives the rotor to rotate, so that the rotating shaft and the pneumatic down-the-hole hammer as well as the coring inner tube are driven to rotate.

2. A turbine type double-spring clip rope coring down-the-hole hammer for directional drilling of hard rock according to claim 1, wherein: the double-spring-clip rope mechanism comprises an upper spring clip and a lower spring clip; the upper spring clip is arranged in a spring clip groove of the upper spring clip seat, and the lower spring clip is arranged in a spring clip groove in the lower spring clip sleeve; the upper elastic clamp and the lower elastic clamp are respectively hinged with the upper elastic clamp seat and the lower elastic clamp sleeve through an upper elastic clamp elastic pin and a lower elastic clamp elastic pin; the inner sides of the upper spring clamp and the lower spring clamp are provided with tension springs, and the tension springs can extend out of the spring clamp grooves under the tension action of the tension springs; the outer sides of the upper spring card and the lower spring card are inclined planes, and the two sides of the recovery blocking card are provided with sheet-shaped double wings for gathering the spring cards.

3. A hard rock directional drilling turbine double spring clip rope coring down-the-hole hammer as set forth in claim 2, wherein: the upper end of the double-spring clamping rope mechanism is provided with a spear, the lower part of the spear is hinged with the upper part of a spear rotating shaft, the spear can freely rotate, and a taper shaft locating pin is arranged in the spear rotating shaft; the upper spring clamping seat is in a circular tube shape, and spring clamping grooves are arranged on the circumference of the upper spring clamping seat; the fishing spear rotating shaft and the force transmission shaft can move in the inner hole of the upper spring clamping seat, and the recovery blocking clamp can slide in the spring clamping groove.

4. A hard rock directional drilling turbine double-bullet stuck wire coring down-the-hole hammer as set forth in claim 3, wherein: the bottom of the spear rotating shaft is provided with a lifting sleeve, an in-place alarm ring is arranged in the lifting sleeve, and the bottom of the lifting sleeve is provided with an end cover.

5. A turbine type double-spring clip rope coring down-the-hole hammer for directional drilling of hard rock according to claim 1, wherein: the turbine below is equipped with pneumatic down-the-hole hammer's outer jar and inner cylinder, and outer jar below is equipped with the impact head, and the inside check valve that is equipped with of outer jar upper end is equipped with the distribution pole below the check valve, the distribution pole top is equipped with the spring.

6. A hard rock directional drilling turbine double bullet stuck wire coring down-the-hole hammer as set forth in claim 5, wherein: when the drilling tool is in a lifting state, the impact head is hung on the lower joint of the outer cylinder through a round key, the piston falls down and presses on the impact head, and the third air inlet hole of the inner cylinder is positioned in the upper cavity of the piston; the compressed air pushes up the check valve, enters the upper cavity of the piston from the third air inlet hole through the first air inlet hole, the second air inlet hole and the annular air passage between the inner cylinder and the outer cylinder, and then directly reaches the hole bottom blowing hole through the central holes of the piston and the impact head to discharge powder.

7. A hard rock directional drilling turbine double bullet stuck wire coring down-the-hole hammer as set forth in claim 6, wherein: the impact stroke and the return stroke of the piston are subjected to three stages of air intake, compression expansion and piston freewheeling.

8. A hard rock directional drilling turbine double bullet stuck wire coring down-the-hole hammer as set forth in claim 7, wherein: when the impact head is pressed on the hole bottom to drill, the impact head and the piston move upwards relative to the inner cylinder and the outer cylinder, compressed air enters the first air inlet hole at the moment, one path of compressed air directly reaches the hole bottom through the throttle hole of the air distribution rod, the center channels of the piston and the impact head, and is directly used for flushing rock debris at the hole bottom to be a direct-blowing powder discharge air path; the other way is that a large amount of compressed air entering the first air inlet enters the lower cavity of the piston through the second air inlet, the annular air passage and the third air inlet, and the compressed air pushes the piston to accelerate upward, which is an air inlet stage; when the piston moves up a certain distance, the gas path entering the lower cavity is cut off by the sealing surface in the middle of the piston, and at the moment, the lower cavity is still a closed cavity, so that the high-pressure gas entering the lower cavity expands to do work, and the piston is continuously pushed to move up, and the stage is the gas compression expansion stage; after the piston continues to move upwards for a certain distance, the compressed air of the lower cavity enters the central hole and the hole bottom of the impact head through the exhaust hole to relieve pressure, and the piston which obtains certain kinetic energy still continues to move upwards by reliable inertia at the moment, namely the piston freewheeling stage.

9. A turbine type double-spring clip rope coring down-the-hole hammer for directional drilling of hard rock according to claim 1, wherein: an inner pipe joint is arranged in the upper end of the inner pipe, a ball valve seat is arranged above the inner pipe joint, and a steel ball is arranged in the ball valve seat; a guide ring is arranged between the inner tube and the outer tube, a drill bit is arranged at the tail end of the inner tube, and a clamp spring is arranged at the center of the drill bit through a clamp spring seat.

10. The turbine type double-spring clip wire-line coring down-the-hole hammer for directional drilling of hard rock according to any one of claims 2 to 4, wherein: the upper spring clip and the lower spring clip are of a bidirectional limiting spring clip structure or a unidirectional limiting hanging spring clip structure.