CN216642002U - Device for rapidly drilling hard rock - Google Patents
Device for rapidly drilling hard rock Download PDFInfo
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- CN216642002U CN216642002U CN202122946014.0U CN202122946014U CN216642002U CN 216642002 U CN216642002 U CN 216642002U CN 202122946014 U CN202122946014 U CN 202122946014U CN 216642002 U CN216642002 U CN 216642002U
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Abstract
The utility model discloses a device for rapidly drilling hard rock, which comprises: the drill bit comprises a drill bit water channel; the shell is sequentially divided into a first chamber, a second chamber and a third chamber from left to right, a first piston and a drill rod positioned on the right side of the first piston are arranged in the first chamber, an exhaust pipe is arranged on the side wall of the first chamber, a second piston is arranged in the second chamber, the left end of the second piston is connected with the right end of the drill rod through a second elastic element, and a hydraulic accelerating assembly is arranged in the third chamber; the air supply is used to power the first piston. The device for rapidly drilling hard rock converts wind kinetic energy into hydraulic pulse energy and impact mechanical energy, and improves the drilling rate of the hard rock by combining the hydraulic pulse and the impact vibration.
Description
Technical Field
The utility model relates to the technical field of mechanical drilling, in particular to a device for quickly drilling hard rock.
Background
With the rapid development of national economy, the coal mining depth is increased at a speed of nearly 20m per year on average, shallow coal resources are increasingly exhausted, and deep mining becomes a normal state of coal resource development.
The pneumatic roofbolter has the advantages of simple structure, convenient operation and low maintenance cost, and can flexibly adjust the number of construction people according to the engineering quantity and the construction conditions, thereby being widely applied to the coal mine drilling and rock breaking engineering. However, with the increase of the mining depth, the hardness, the elastic modulus and the breaking strength of the rock in the deep stratum are continuously increased, and the compressive strength of the rock can reach more than 100MPa, so that the impact and the abrasion on a drill rod and a cutter in the drilling process of the pneumatic anchor rod drilling machine are rapidly increased, the drill rod is easy to break and the drill bit is easy to damage, and the rock breaking capacity and the rock breaking efficiency of the pneumatic anchor rod drilling machine are greatly reduced. Meanwhile, the associated dust in the rock breaking process deteriorates the underground ecological environment, and because the underground space is limited, the polluted air is difficult to be quickly purified to the standard of clean air only by manual ventilation, so that the health of constructors is damaged to different degrees. The field practice shows that the drilling efficiency can not be increased and the drill bit abrasion can be aggravated only by increasing the power of the drilling machine, so that the rock breaking efficiency of the drilling can not be effectively improved only by increasing the power of the drilling machine.
The high-pressure water jet rock breaking is a technology for breaking rock by utilizing high-speed water flow impact, and the auxiliary effect of the high-pressure water jet rock breaking is proved to be capable of reducing the stress of a drill bit, improving the rock breaking capacity to a certain extent and prolonging the service life of the drill bit. However, conventional high-pressure water jet assist equipment tends to have the following problems: the continuous high-pressure water jet only generates single 'water hammer pressure', and the subsequent 'stagnation pressure' is difficult to aggravate the internal fracture of the rock, as shown in figure 1, so that the rock breaking efficiency is poor; the high-pressure water jet auxiliary equipment usually utilizes components such as a high-pressure water pump and a supercharger to generate high-pressure water flow, the generated water jet is unstable, and meanwhile, internal elements of the supercharger are complex, so that the design difficulty is increased, and the use cost is increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems that the drilling and rock breaking efficiency of a pneumatic anchor rod drilling machine is difficult to effectively improve only by increasing the power of the drilling machine and the rock breaking efficiency of continuous high-pressure water jet is poor in the prior art, the utility model provides a device for quickly drilling hard rock. The device for rapidly drilling hard rock integrates the high-pressure water jet system into the pneumatic mechanical rock breaking equipment, so that the mechanical drilling efficiency of the hard rock can be effectively improved.
The utility model provides a device for rapidly drilling hard rock, which comprises:
a drill bit comprising a drill bit waterway;
the hydraulic accelerating assembly comprises a first contraction pipe, a fluid director, an impeller and a second contraction pipe, the first contraction pipe, the fluid director, the impeller and the second contraction pipe are sequentially arranged from left to right, one end of the first contraction pipe is fixed on the inner wall of the shell, the other end of the first contraction pipe is fixedly connected with the fluid director, one end of the second contraction pipe is fixedly connected with a base of the impeller, and the other end of the second contraction pipe is fixedly connected with the drill bit;
and the air source is used for providing power for the first piston.
In some embodiments, the air source provides power for the first piston through a pneumatic three-way valve, a pilot valve air hole of the air source is connected with an air inlet of the pneumatic three-way valve through a third air inlet pipeline, a first air outlet of the pneumatic three-way valve is connected with the first air inlet pipeline, the other end of the first air inlet pipeline penetrates through the shell and is arranged on the left side of the first piston, a second air outlet of the pneumatic three-way valve is connected with a second air inlet pipeline, and when the air source pushes the first piston to move to the right limit position of the first chamber, the exhaust pipe and the other end of the second air inlet pipeline are respectively located on the left side of the first piston and between the first piston and the drill rod.
In some embodiments, the cross-sectional area of the first shrink tube tapers from left to right, and the second shrink tube is internally provided with a third elastic element.
In some embodiments, the left end of the drill rod is connected to a first resilient element.
In some embodiments, the second piston is fitted with a seal groove.
In some embodiments, a first limit plate and a second limit plate are respectively arranged between the first chamber and the second chamber and between the second chamber and the third chamber, the first limit plate limits the drill rod, and the second limit plate limits the second piston.
In some embodiments, the water source is arranged at one end of the third chamber close to the second limit plate, and a water inlet of the water source is arranged at one end of the third chamber close to the second limit plate.
In some embodiments, the water inlet is connected with a water inlet pipe, the other end of the water inlet pipe is connected with a water pump, and a water valve is arranged between the water pump and the water inlet pipe.
The working process of the rapid drilling hard rock comprises the following steps:
(1) starting the water pump, enabling water to enter the second chamber from the water inlet, and enabling the water to flow out of the drill bit water channel after passing through the hydraulic accelerating assembly;
(2) opening an operating valve, pushing the first piston to move towards the right by high-pressure gas, pushing the drill rod to move towards the right by the first piston, squeezing water in the second chamber by the second piston, enabling the water to flow through the hydraulic accelerating assembly to form hydraulic pulses, and enabling the water to flow out of the drill bit water channel and then to act on rock together with the drill bit;
(3) when the first piston moves to the right side to the limit position, the high-pressure gas pushes the first piston to move to the left side, and when the first piston moves to the left side to the limit position, the high-pressure gas pushes the first piston to move to the right side, so that the first piston reciprocates in the first chamber;
(4) when the second elastic element moves to the right to the limit position, the second elastic element pushes the drill rod to move to the left until the next impact of the first piston.
Compared with the prior art, the utility model has the beneficial effects that:
the device for rapidly drilling hard rock converts wind kinetic energy into hydraulic pulse energy and impact mechanical energy, and improves the drilling rate of the hard rock by combining the hydraulic pulse and the impact vibration;
the device for rapidly drilling hard rock reduces the stress of the drill bit, improves the rock breaking capacity of the drill bit and prolongs the service life of the drill bit;
the hydraulic jet flow generated by the device for rapidly drilling hard rock can play a role in impacting and softening the hard rock, simultaneously reduce the dust concentration in the drilling process and achieve the aim of purifying the air in the underground coal mine.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a continuous water jet assisted mechanical tool drilling and a pressure curve over time in the prior art;
FIG. 2 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 3 is a schematic diagram of the working principle of the pneumatic three-way valve of the present invention;
FIG. 4 is a schematic view of a first shrink tube of the present invention;
FIG. 5 is a schematic view of the construction of the fluid director of the present invention;
FIG. 6 is a schematic structural view of an impeller according to the present invention;
fig. 7 is a schematic diagram of drilling and pressure versus time for the present invention.
Description of reference numerals:
the pneumatic valve comprises a shell 1, an air hole 2 of a control valve, a third air inlet pipeline 3, an air inlet 4, a first air outlet 5, a second air outlet 6, a valve core 7, a pneumatic three-way valve 8, a second air inlet pipeline 9, a first piston 10, a second piston 11, a drill rod 12, a first elastic element 13, a second elastic element 14, a third elastic element 15, a first limiting plate 16, a second limiting plate 17, a first chamber 18, a second chamber 19, a third chamber 20, a first shrinkage pipe 21, a second shrinkage pipe 22, a fluid director 23, an impeller 24, a wheel shaft 25, a gear tooth 26, a first shrinkage pipe 27, a second shrinkage pipe 28, a third shrinkage pipe 29, a drill bit 30, a water pump 31, a water valve 32, an water inlet pipe 33 and an exhaust pipe 34.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
An apparatus for rapid drilling of hard rock according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 2-7, the apparatus for rapid drilling of hard rock comprises a housing 1, a drill bit 30, an air supply and a water supply.
The housing 1 is divided into a first chamber 18, a second chamber 19, and a third chamber 20 in this order from left to right. A first piston 10 and a drill rod 12 positioned at the right side of the first piston 10 are arranged in a first chamber 18, and an exhaust pipe 34 is arranged on the side wall of the first chamber 18; a second piston 11 is arranged in the second chamber 19, the left end of the second piston 11 is connected with the right end of the drill rod 12 through a second elastic element 14, and a hydraulic accelerating assembly is arranged in the third chamber 20. Wherein the second elastic element 14 is used for accumulating elastic potential energy.
It will be appreciated that the first piston 10, the drill rod 12 and the second piston 11 may slide inside the housing 1.
In some embodiments, a first limit plate 16 and a second limit plate 17 are respectively arranged between the first chamber 18 and the second chamber 19 and between the second chamber 19 and the third chamber 20, the first limit plate 16 limits the drill rod 12, and the second limit plate 17 limits the second piston 11. Specifically, the drill rod 12 comprises a vertical end and a transverse end, the vertical end and the transverse end are transversely arranged in a first cavity 18 in a T shape, the vertical end of the drill rod 12 is close to the first piston 10, a first limiting plate 16 is arranged between the first cavity 18 and a second cavity 19, the first limiting plate 16 is arranged to enable the transverse end of the drill rod 12 to pass through the first cavity 18 and enter the second cavity 19, the vertical end of the drill rod 12 cannot pass through the first cavity 18, and when the drill rod 12 moves towards the right side, the drill rod 12 is limited. The first limit plate 16 is fixedly connected with the inner wall of the shell 1, and the first limit plate 16 is provided with a through hole for the transverse end of the drill rod 12 to pass through. And the second limiting plate 17 is arranged in the second chamber 19 and the third chamber 20, and when the second piston 11 moves towards the right side, the second piston 11 is limited, so that the second piston 11 is prevented from moving to the right side of the water inlet, and water flows into the space on the left side of the second piston 11. In addition, when the second piston 11 moves to the left, the first limit plate 16 may also limit the second piston 11, preventing the second piston 11 from moving to the first chamber 18 through the second chamber 19, i.e., the first limit plate 16 and the second limit plate 17 are disposed such that the second piston 11 reciprocates in the second chamber 19.
In some embodiments, the left end of the drill rod 12 is connected to a first elastic element 13. It will be appreciated that a first elastic element 13 is connected to the left end of the drill rod 12 to buffer the impact force of the first piston 10, so as to prevent the first piston 10 from directly striking the drill rod 12 and causing damage to the first piston 10.
In some embodiments, the second piston 11 is fitted with a seal groove. It will be appreciated that the second piston 11 is used to squeeze water, and the provision of a seal groove may be used to prevent water from flowing to the left side of the second piston 11.
The hydraulic accelerating component comprises a first shrinkage pipe 21, a flow guider 23, an impeller 24 and a second shrinkage pipe 22 which are sequentially arranged from left to right. One end of the first shrinkage pipe 21 is fixed on the inner wall of the shell 1, and the other end of the first shrinkage pipe 21 is fixedly connected with the fluid director 23. In some embodiments, the other end of the first shrink tube 21 is fixedly connected with the fluid director 23 through a screw thread.
The cross-sectional area of the first shrink tube 21 gradually decreases from left to right, and it can be understood that the cross-sectional area of the first shrink tube 21 gradually decreases from left to right, and water flows in from the left end of the first shrink tube 21 and then flows out from the right end of the first shrink tube 21, that is, water flows in from the end with the wide cross-sectional area of the first shrink tube 21 and then flows out from the end with the narrow cross-sectional area of the first shrink tube 21, so that the first convergence of hydraulic energy is realized. In some embodiments, as shown in fig. 4, the inner cavity of the first shrinkable tube 21 is divided into three sections, namely a first shrinkable tube 27, a second shrinkable tube 28 and a third shrinkable tube 29 from left to right, wherein the first shrinkable tube 27 is fixedly connected with the second shrinkable tube 28, and the second shrinkable tube 28 is fixedly connected with the third shrinkable tube 29. Wherein the cross-sectional area of the primary shrinkage pipe 27 is the largest, and the cross-sectional area of the tertiary shrinkage pipe 29 is the smallest, and during operation, water flows from the primary shrinkage pipe 27 to the tertiary shrinkage pipe 29.
The fluid director 23 is shown in fig. 5, and the fluid director 23 is connected with the three-stage shrinkage pipe 29 of the first shrinkage pipe 21 by screw threads. In the working process, water flows from the left end of the fluid director 23 to the right end of the fluid director 23, the right end of the fluid director 23 is a water outlet, and the cross sectional area of the water outlet is smaller than that of the left end of the fluid director 23, so that the second convergence of hydraulic energy is realized.
The impeller 24 includes a hub 25 and gear teeth 26, the gear teeth 26 rotating about the hub 25. The impeller 24 is arranged on the right side of the fluid director 23, and water flows out of the water outlet of the fluid director 23 and then impacts the impeller 24. In the working process, because the water for flushing the impeller 24 is constantly changed, the water flowing through the impeller 24 is constantly pressed, released, pressed and released in time and time to form hydraulic pulse, and the third convergence of hydraulic energy is realized.
The second shrink tube 22 is arranged to the right of the impeller 24, i.e. the impeller 24 is arranged between the flow director 23 and the second shrink tube 22. One end of the second shrinkage pipe 22 is fixedly connected with the base of the impeller 24, and the other end of the second shrinkage pipe 22 is fixedly connected with the drill 30. Specifically, one end of the second shrink tube 22 is fixedly connected with the base of the impeller 24 through a screw, and the other end of the second shrink tube 22 is fixedly connected with the drill bit 30 through a thread arranged outside the second shrink tube.
In some embodiments, the lumen of the second collapsible tube 22 is divided into two segments, which allows for the gathering of the water flow and the fourth concentration of hydraulic energy.
In some embodiments, the third elastic element 15 is disposed inside the second shrink tube 22, and the third elastic element 15 is particularly disposed at the front end inside the second shrink tube 22.
A drill bit 30 is arranged at the foremost end of the housing 1 for mechanical drilling of rock, the drill bit 30 comprising a drill bit waterway arranged inside the drill bit 30.
A gas source for powering the first piston 10.
In some embodiments, the air supply powers the first piston 10 through a pneumatic three-way valve 8. The schematic diagram of the working principle of the pneumatic three-way valve 8 is shown in fig. 3. The pneumatic three-way valve 8 comprises three inlets and outlets and a valve core 7, wherein one of the three inlets and the other two are air outlets, and the air flow direction is changed by changing the position of the valve core 7. As shown in fig. 3(a), the gas flows out from the first gas outlet 5; as shown in fig. 3(b), the gas flows out from the second gas outlet 6.
An air hole 2 of an operating valve of an air source is connected with an air inlet 4 of a pneumatic three-way valve 8 through a third air inlet pipeline 3, a first air outlet 5 of the pneumatic three-way valve 8 is connected with a first air inlet pipeline, the other end of the first air inlet pipeline penetrates through a shell 1 and is arranged on the left side of a first piston 10, a second air outlet 6 of the pneumatic three-way valve 8 is connected with a second air inlet pipeline 9, and when the air source pushes the first piston 10 to move to the right limit position of a first chamber 18, an exhaust pipe 34 and the other end of the second air inlet pipeline 9 are respectively located on the left side of the first piston 10 and between the first piston 10 and a drill rod 12.
It is understood that the first elastic element 13, the second elastic element 14 and the third elastic element 15 may be springs or other suitable elastic materials.
The water inlet of the water source is arranged at one end of the third chamber 20 close to the second limiting plate 17, specifically, the water inlet of the water source is arranged between the second limiting plate 17 and the first shrinkage pipe 21. The water inlet is connected with a water inlet pipe 33, the other end of the water inlet pipe 33 is connected with a water pump 31, and a water valve 32 is arranged between the water pump 31 and the water inlet pipe 33. The water pump 31 is used to pump water, and a low-pressure water pump may be used. The water valve 32 is used to control the flow rate of water in the inlet pipe 33.
The working process of the rapid drilling hard rock comprises the following steps:
(1) starting the water pump 31, wherein water enters the second chamber 19 through the water inlet pipe 33 via the water inlet, passes through the hydraulic accelerating assembly and then flows out of the drill bit water channel;
(2) opening the operating valve, the high-pressure gas pushes the first piston 10 to move towards the right side, the first piston 10 pushes the drill rod 12 to move towards the right side, and the second piston 11 extrudes water in the second chamber 19, so that water flows through the hydraulic accelerating assembly to form hydraulic pulses, and then the water flows out of the drill bit water channel to act on rock together with the drill bit 30;
(3) when the first piston 10 moves to the right to the limit position, the high-pressure gas pushes the first piston 10 to move to the left, and when the first piston 10 moves to the left to the limit position, the high-pressure gas pushes the first piston 10 to move to the right, so that the first piston 10 reciprocates in the first chamber 18;
(4) when the second elastic element 14 moves to the right to the limit position, the second elastic element 14 pushes the drill rod 12 to move to the left until the next impact of the first piston 10.
The water pump 31 is started, the water valve 32 is opened, water enters the second chamber 19 through the water inlet pipe 33 and the water inlet arranged between the second limiting plate 17 and the first shrinkage pipe 21, and flows out of the drill bit water channel after passing through the first shrinkage pipe 21, the fluid director 23, the impeller 24 and the second shrinkage pipe 22 in sequence, air in the fittings can be discharged in the process, and the formation of subsequent hydraulic pulses is guaranteed.
And opening an operating valve of a gas source, allowing high-pressure gas to flow out of the air hole 2 of the operating valve and flow in from the gas inlet 4 of the pneumatic three-way valve 8 through the third gas inlet pipeline 3, at the moment, plugging the second gas outlet 6 of the pneumatic three-way valve 8 by the valve core 7, and allowing the gas to enter the space on the left side of the first piston 10 from the first gas outlet 5 of the pneumatic three-way valve 8 through the first gas inlet pipeline. Then high-pressure gas acts on the left side of the first piston 10 to push the first piston 10 to move towards the right side, the first piston 10 is pushed by the high-pressure gas to move towards the right side quickly, the first piston 10 is pushed by the high-pressure gas to move towards the right side and is contacted with the drill rod 12, the drill rod 12 pushes the drill rod 12 to move towards the right side, the second piston 11 carrying high impact energy moves towards the right side to squeeze water in the second chamber 19, the water flows through the first contraction pipe 21 to realize the initial gathering of the water flow and the gathering of the energy, then the water passes through the fluid director 23 to realize the second energy gathering of waterpower, the water flowing out of the fluid director 23 impacts the impeller 24, and the water flowing through the impeller 24 is constantly changed, so that the water pressure holding-releasing-holding-pressure-releasing is constantly carried out, a waterpower pulse is formed, and the third gathering of waterpower energy is realized. The water then flows through the second shrink tube 22, achieving a fourth convergence of hydraulic energy. Finally, the water passes through the drill water channel to form hydraulic jet flow impacting the rock. Meanwhile, the hydraulic pulse acts on the front end of the second shrinkage pipe 22, and the shrinkage pipe drives the drill bit 30 to generate vibration impact force and act on the rock, so that the mechanical rock breaking effect is generated. This impact process achieves the conversion of pneumatic energy to hydraulic pulses and mechanical impact energy.
When the first piston 10 moves rightward to the right of the exhaust pipe 34, high-pressure gas escapes from the exhaust pipe 34, and at the same time, the first piston 10 continues to move rightward. When the first piston 10 moves to the right, it presses the air in the first chamber 18, so that part of the air flows from the second air inlet pipe 9 to the pneumatic three-way valve 8 and acts on the pneumatic three-way valve 8, and at this time, the valve core 7 blocks the first air outlet 5. High pressure gas enters the first chamber 18 from the second outlet port 6 through the second inlet duct 9, at which time the first piston 10 moves to the right to the limit position, and the exhaust pipe 34 and the other end of the second inlet duct 9 are located to the left of the first piston 10 and between the first piston 10 and the drill rod 12, respectively. Therefore, after the high-pressure gas enters the first chamber 18 from the second air inlet pipe 9, the first piston 10 is pushed to move to the left, when the first piston 10 moves to the left side of the exhaust pipe 34, the high-pressure gas escapes from the exhaust pipe 34, at this time, the first piston 10 continues to move to the left, and the air inside the first chamber 18 is pressed during the movement of the first piston 10 to the left, so that part of the air flows to the pneumatic three-way valve 8 from the first air inlet pipe and acts on the pneumatic three-way valve 8, and at this time, the valve core 7 blocks the second air outlet 6. The first piston 10 moves to the left side to the extreme position, and high-pressure gas enters the space on the left side of the first piston 10 from the first gas outlet 5 of the pneumatic three-way valve 8 to push the first piston 10 to move to the right side, so that the drill rod 12 is impacted again. Repeating the above process causes the first piston 10 to reciprocate within the first chamber 18.
When the second elastic element 14 stops moving in the second chamber 19, the second elastic element 14 is compressed to the shortest, at which point the stored elastic potential energy is the largest. Subsequently, the second elastic element 14 releases the elastic potential energy, pushing the drill rod 12 to move to the left and stop at the left side of the first chamber 18, at which point the drill rod 12 returns, completing the sequential reciprocating movement, waiting for the next impact of the first piston 10.
Therefore, the high-pressure gas pneumatic energy is converted into hydraulic pulse energy and mechanical impact energy, and the hard rock is more favorably crushed. The hydraulic pulse size and frequency can be realized by adjusting the air pressure of the gas flowing into the air hole 2 of the control valve. The hydraulic pulse generated in the process acts on the rock to generate periodic 'water hammer pressure', the rock is impacted to generate stress waves, the stress waves generate interference in the rock to aggravate the damage degree of the rock, and a drilling schematic diagram and a pressure time-dependent change curve of the hydraulic pulse are shown in fig. 7; meanwhile, the hydraulic pulse drives the drill bit to generate mechanical vibration impact, and finally the effect of improving the rock drilling efficiency is achieved.
The utility model utilizes the pneumatic energy of high-pressure gas to be converted into hydraulic pulse and mechanical energy, and high-pressure pulse jet flow is fused into the pneumatic mechanical rock breaking.
On one hand, the high-pressure gas generates a periodic compression effect on water, the water passes through the hydraulic accelerating assembly to form periodic hydraulic pulses, the hydraulic pulses act on the drill bit 30 to apply periodic impact acting force to the drill bit 30, the stress state of the drill bit 30 and the rock is improved, and the drill bit 30 has a vibration impact effect while rotating. When the drilling machine drills in a rotary impact mode, uncrushed rocks are in a tension pressure stress state, and the rocks are broken more easily after being subjected to periodic impact, so that the rock breaking efficiency of the pneumatic machine is improved.
On the other hand, water flows through the hydraulic accelerating device under the compression action of high-pressure gas to form hydraulic pulses, and finally the hydraulic pulses are sprayed out through the water channel of the drill bit 30, the hydraulic pulses are converted into hydraulic jet flow to act on the rock, a certain softening effect is achieved on the rock, the breaking strength of the rock is reduced to a certain degree, meanwhile, the hydraulic jet flow achieves a certain splitting effect on the rock, the rock is resistant to compression and not resistant to tension, and the mechanical rock breaking effect of the pneumatic drilling machine is facilitated.
In conclusion, the device directly acts on the drill bit 30 through the hydraulic pulse, so that the easily damaged impact hammer and other appliances commonly adopted in the current rotary impactor are reduced, and the safety and the reliability of the system are improved. Meanwhile, a hydraulic accelerating device is introduced, so that a heavy high-pressure water pump or a pressurizing device is avoided, the equipment is light and convenient to assemble, the rock breaking speed of hard rock is effectively improved, and pneumatic energy is converted into hydraulic pulse energy and mechanical energy, so that the hard rock can be broken in a coal mine site more conveniently.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. An apparatus for rapid drilling into hard rock, comprising:
the hydraulic accelerating device comprises a shell, a first piston and a drill rod positioned on the right side of the first piston are arranged in the first cavity, an exhaust pipe is arranged on the side wall of the first cavity, a second piston is arranged in the second cavity, the left end of the second piston is connected with the right end of the drill rod through a second elastic element, and a hydraulic accelerating assembly is arranged in the third cavity;
the air source is used for providing power for the first piston;
a drill bit including a bit waterway.
2. The device of claim 1, wherein the air source powers the first piston through a pneumatic three-way valve, an air hole of a control valve of the air source is connected with an air inlet of the pneumatic three-way valve through a third air inlet pipeline, a first air outlet of the pneumatic three-way valve is connected with a first air inlet pipeline, the other end of the first air inlet pipeline penetrates through the shell and is arranged on the left side of the first piston, a second air outlet of the pneumatic three-way valve is connected with a second air inlet pipeline, and when the air source pushes the first piston to move to the right limit position of the first chamber, the other ends of the exhaust pipe and the second air inlet pipeline are respectively arranged on the left side of the first piston and between the first piston and the drill rod.
3. The device as claimed in claim 1, wherein the hydraulic accelerating component comprises a first shrink tube, a flow guider, an impeller and a second shrink tube which are arranged from left to right, one end of the first shrink tube is fixed on the inner wall of the shell, the other end of the first shrink tube is fixedly connected with the flow guider, one end of the second shrink tube is fixedly connected with the base of the impeller, and the other end of the second shrink tube is fixedly connected with the drill bit.
4. The apparatus of claim 3, wherein the cross-sectional area of the first shrink tube decreases from left to right, and a third elastic member is disposed inside the second shrink tube.
5. A device according to any of claims 1-4, characterised in that the left end of the drill rod is connected to a first elastic element.
6. The apparatus of claim 5, wherein the second piston is fitted with a seal groove.
7. The apparatus of claim 6, wherein a first and a second limit plate are disposed between the first and the second chamber and between the second and the third chamber, respectively, the first limit plate limiting the drill rod and the second limit plate limiting the second piston.
8. The apparatus of claim 7, further comprising a water source having an inlet disposed at an end of the third chamber proximate the second restriction plate.
9. The device of claim 8, wherein the water inlet is connected to a water inlet pipe, the other end of the water inlet pipe is connected to a water pump, and a water valve is arranged between the water pump and the water inlet pipe.
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| CN202122946014.0U CN216642002U (en) | 2021-11-26 | 2021-11-26 | Device for rapidly drilling hard rock |
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| CN202122946014.0U CN216642002U (en) | 2021-11-26 | 2021-11-26 | Device for rapidly drilling hard rock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293915A (en) * | 2021-11-26 | 2022-04-08 | 煤炭科学研究总院 | Device and method for rapidly drilling hard rock |
| CN117306533A (en) * | 2023-11-29 | 2023-12-29 | 江苏晓宇水利建设有限公司 | Water conservancy protection dam cementer with automatic compaction function |
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2021
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293915A (en) * | 2021-11-26 | 2022-04-08 | 煤炭科学研究总院 | Device and method for rapidly drilling hard rock |
| CN114293915B (en) * | 2021-11-26 | 2022-10-28 | 煤炭科学研究总院有限公司 | Device and method for rapidly drilling hard rock |
| CN117306533A (en) * | 2023-11-29 | 2023-12-29 | 江苏晓宇水利建设有限公司 | Water conservancy protection dam cementer with automatic compaction function |
| CN117306533B (en) * | 2023-11-29 | 2024-01-26 | 江苏晓宇水利建设有限公司 | Water conservancy protection dam cementer with automatic compaction function |
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