CN209780748U - Frequency-adjustable resonance type hydraulic rock drill - Google Patents
Frequency-adjustable resonance type hydraulic rock drill Download PDFInfo
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- CN209780748U CN209780748U CN201920471714.9U CN201920471714U CN209780748U CN 209780748 U CN209780748 U CN 209780748U CN 201920471714 U CN201920471714 U CN 201920471714U CN 209780748 U CN209780748 U CN 209780748U
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Abstract
the utility model relates to a resonance formula hydraulic rock drill can frequently, the rock drill is including advancing subassembly, impact subassembly, gyration subassembly, power pack and drill rod subassembly, power pack drives advancing subassembly, impact subassembly and gyration subassembly respectively, it drives drill rod subassembly and rock contact to strike the subassembly, and is broken with the rock impact, it includes double nozzle plate electric feedback formula electro-hydraulic servo valve and impact mechanism to strike the subassembly, impact mechanism's reciprocating motion is controlled the realization by double nozzle plate electric feedback formula electro-hydraulic servo valve. The technical scheme has a novel structure, solves the problem of high-efficiency rock drilling of the rock drill in a resonance state, has the advantages of high control precision, long service life and the like, and realizes quick adjustment of the impact frequency of the impact component through the operation of the electro-hydraulic servo valve.
Description
Technical Field
The utility model relates to a rock drill, concretely relates to resonance formula hydraulic rock drill can frequently belongs to building stones exploitation mechanical equipment technical field.
background
Rock drills are widely used in the rock engineering fields of mines, hydropower and the like. At present, the rock drills mainly comprise a pneumatic rock drill and a hydraulic rock drill, but the drilling efficiency of the two rock drills is lower when the two rock drills are applied to drilling of high-hardness rocks. The existing rock drill works according to the impact crushing principle, and a piston does high-frequency reciprocating motion during working to continuously impact a drill bit shank. Under the action of impact force, the wedge-shaped bit crushes and drills the rock to a certain depth to form a dent. To the rock of different hardness, the efficiency of work is different, and is comparatively low, can not satisfy the field usage, the prior art shortcoming on the existing market:
1) When drilling a high-hardness rock, the impact mechanism is limited by the impact frequency in the reciprocating motion, so that the rock drilling machine generally has lower efficiency of drilling the rock at a fixed frequency and can cause the phenomenon that the drill bit of the rock drilling machine is damaged;
2) Rock drilling generally works in the field, and is powered by a generator, and if power failure occurs, a piston cylinder is damaged;
3) The drill bit shank and the end face of the impact piston colliding with the drill bit shank are easy to damage; the mutual collision damage of the drill rod seat and the impact body seat and other problems, the piston repeatedly collides with the drill rod tail, and the piston or parts of the drill rod tail can be damaged.
Therefore, a new technical solution is urgently needed to solve the technical problems.
Disclosure of Invention
the utility model discloses just to the problem that exists among the prior art, provide a simple structure, but resonant hydraulic rock drill that the practicality is strong, this scheme utilizes the resonance that drill bit and rock produced to make the rock breakage, has improved traditional rock drill rock drilling efficiency greatly, has especially improved the drilling efficiency of rock drill under hard rock geological conditions.
In order to realize above-mentioned purpose, the technical scheme of the utility model as follows, a resonance type hydraulic rock drill can frequently, a serial communication port, the rock drill is including advancing subassembly, impact subassembly, gyration subassembly, power component and drill rod subassembly, power component drives respectively and advances subassembly, impact subassembly and gyration subassembly, impact the subassembly and drive drill rod subassembly and rock contact, strike the rock and strike the breakage.
As an improvement of the utility model, the impact component comprises a double-nozzle baffle plate electric feedback type electro-hydraulic servo valve and an impact mechanism, and the reciprocating motion of the impact mechanism is controlled by the double-nozzle baffle plate electric feedback type electro-hydraulic servo valve to realize. The double-nozzle baffle plate electric feedback type electro-hydraulic servo valve adopted in the scheme is a key element in electro-hydraulic servo control, is a hydraulic control valve which correspondingly outputs modulated flow and pressure after receiving an analog electric signal, and has the advantages of quick dynamic response, high control precision, long service life and the like. The impact frequency of the impact member can be adjusted relatively quickly by the operation of the electro-hydraulic servo valve.
Because the resonance frequency of the rock is related to the natural frequency of the rock, the mass and the shape of the rock, the natural frequency of the rock is found as follows: firstly setting the scanning frequency range of the electro-feedback type electro-hydraulic servo valve at 10-200Hz and 10Hz intervals, observing the working effect of rock drilling, reducing the range value of the resonant frequency of the searched rock, such as 20-40Hz, then setting the scanning frequency interval of the electro-feedback type electro-hydraulic servo valve at 2Hz, and observing the working effect of rock drilling, wherein the rock drilling efficiency can be greatly improved only by positioning the impact frequency near the resonant frequency of the rock. The whole scanning and frequency modulation process only needs 2-3 minutes, and finally the rock drill adopts the actual working vibration frequency close to the resonance frequency to drill the rock, and the rock is crushed by utilizing the resonance generated by the drill bit and the rock, so that the rock drilling efficiency of the traditional rock drill is greatly improved, and particularly the drilling efficiency of the rock drill under the hard rock geological condition is improved.
As an improvement of the utility model, the power component includes first motor, second motor, first check valve, second check valve, first guide's formula overflow valve and second guide's formula overflow valve, first motor drives first check valve and supplies oil to the system, controls through first guide's formula overflow valve and provides power to gyration subassembly and propulsion assembly, the second motor drives the second check valve and supplies oil to the system, controls through second guide's formula overflow valve and provides power to the impact assembly.
as an improvement of the utility model, the propulsion assembly includes advancing mechanism and tribit four-way solenoid valve, advancing mechanism's the gos forward and retreat and realize control by tribit four-way solenoid valve.
As an improvement of the utility model, the rotation component includes rotation mechanism and adjusts the electromagnetic directional valve, rotation mechanism's positive and negative rotation is realized by adjusting the electromagnetic directional valve.
As an improvement of the utility model, the drill rod subassembly includes the drill rod and strikes the piston, advancing mechanism makes the drill rod and rock contact, strike the mechanism and drive the drill rod tail that strikes piston reciprocating motion striking drill rod, the head of drill rod strikes the rock breakage.
as an improvement of the utility model, the propulsion assembly further comprises a propulsion pressure control valve, the propulsion pressure control valve is arranged between the propulsion mechanism and the three-position four-way solenoid valve.
As an improvement of the present invention, the impact assembly further includes a high-pressure accumulator, the high-pressure accumulator is connected to the impact mechanism 13, the high-pressure accumulator absorbs pressure impact and provides energy required for the movement of the piston.
As an improvement of the utility model, the high pressure energy storage ware includes interior cavity, outer cavity, sets up the diaphragm at the intermediate position to and the energy storage ware lid, highly compressed nitrogen gas is imported to outer cavity, and the pressure oil of interior cavity is passed through the energy storage ware lid from advancing back oil pipe and is passed in and out. During normal work, the diaphragm structure that this scheme set up can let the vibration frequency of diaphragm and impacter vibration frequency be close to make the diaphragm vibrate the distance of off-centre position also substantially equal during, just so can effectually prevent the back and hit.
As an improvement of the utility model, the drill rod afterbody is provided with the striking piece with the terminal surface of strikeing the piston, the effectual drill rod tail that prevents with the damage of strikeing the piston terminal surface.
As an improvement of the utility model, the junction of drill rod and impact mechanism is provided with the vibration isolation sealed pad. Not only can protect the drill rod seat and the impact body seat from generating cracks and the like, but also can play a role in sealing and prevent the leakage of pressure oil.
Compared with the prior art, the utility model has the advantages as follows: 1) the technical scheme has a novel structure, solves the problem of the working of the rock drill in a resonance state, has the advantages of high control precision, long service life and the like, and can quickly adjust the impact frequency of an impact part by operating the valve; 2) the technical scheme is provided with the high-pressure energy accumulator, and the scheme effectively absorbs the redundant flow supplied by the oil pump at the beginning and return stages of the piston stroke and provides the peak flow required by the piston motion at the later stage of the stroke; absorbing pressure shocks to reduce pressure peaks and extend their service life; 3) according to the scheme, the impact blocks are additionally arranged on the end surfaces impacted by the drill bit shank and the piston and are fixed on the end surfaces impacted by the drill bit shank and the piston by using the countersunk head screws, so that the damage to the end surfaces of the drill bit shank and the impact piston is effectively prevented; 4) because the rock drill works under the resonance frequency, the amplitude is increased, and the impact amplitude is also increased, the vibration isolation sealing gasket is additionally arranged at the joint of the drill body seat and the impact body seat, so that the phenomena of cracks and the like of the drill body seat and the impact body seat can be prevented, the sealing effect can be achieved, and the leakage of pressure oil is prevented; 5) this scheme utilizes the rock drill during operation under resonant frequency on the basis of having kept the function that traditional rock drill impacted the drilling rock, and the characteristic that the amplitude increases, effectual stack resonance power carry out the rock drilling, and this scheme still has advantages such as drilling speed is fast, long service life and noise are low, and the device will have very big application prospect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of a high pressure accumulator configuration;
Fig. 4 is a partial structural schematic view of fig. 1.
In the figure: 1. the device comprises a first pilot overflow valve, a first three-phase pump, a first motor, a second pilot overflow valve, a second one-way pump, a first motor, a second motor, a regulating electromagnetic directional valve, a three-position four-way electromagnetic valve, a second motor, a third motor, a fourth motor, a regulating electromagnetic directional valve, a fourth motor, a fifth motor, a sixth motor, a seventh motor, a sixth motor, a seventh motor.
the specific implementation mode is as follows:
For the purpose of enhancing the understanding of the present invention, the following detailed description is made with reference to the accompanying drawings.
Example 1: referring to fig. 1, the frequency-adjustable resonant hydraulic rock drill comprises a propelling component, an impact component, a rotary component, a power component and a drill rod component, wherein the power component drives the propelling component, the impact component and the rotary component respectively, the impact component drives the drill rod component to contact with rocks to impact and crush the rocks, the impact component comprises a double-nozzle baffle plate electric feedback type electro-hydraulic servo valve 9 and an impact mechanism 13, and the reciprocating motion of the impact mechanism 13 is controlled by the double-nozzle baffle plate electric feedback type electro-hydraulic servo valve 9. The double-nozzle baffle plate electric feedback type electro-hydraulic servo valve 9 adopted in the scheme is a key element in electro-hydraulic servo control, is a hydraulic control valve which correspondingly outputs modulated flow and pressure after receiving an analog electric signal, and has the advantages of quick dynamic response, high control precision, long service life and the like. The impact frequency of the impact component can be adjusted relatively quickly through the operation of the valve; because the resonance frequency of the rock is related to the natural frequency of the rock, the mass and the shape of the rock, the natural frequency of the rock is found as follows: firstly setting the scanning frequency range of the electro-feedback type electro-hydraulic servo valve at 10-200Hz and 10Hz intervals, observing the working effect of rock drilling, reducing the range value of the resonant frequency of the searched rock, such as 20-40Hz, then setting the scanning frequency interval of the electro-feedback type electro-hydraulic servo valve at 2Hz, and observing the working effect of rock drilling, wherein the rock drilling efficiency can be greatly improved only by positioning the impact frequency near the resonant frequency of the rock. The whole scanning and frequency modulation process only needs 2-3 minutes, and finally the rock drill adopts the actual working vibration frequency close to the resonance frequency to drill the rock, and the rock is crushed by utilizing the resonance generated by the drill bit and the rock, so that the rock drilling efficiency of the traditional rock drill is greatly improved, and particularly the drilling efficiency of the rock drill under the hard rock geological condition is improved. The power assembly comprises a first motor 3, a second motor 6, a first check valve 2, a second check valve 5, a first pilot overflow valve 1 and a second pilot overflow valve 4, the first motor 3 drives the first check valve 2 to supply oil to a system, the first pilot overflow valve 1 controls to supply power to a rotary assembly and a propulsion assembly, the second motor 6 drives the second check valve 5 to supply oil to the system, the second pilot overflow valve 4 controls to supply power to an impact assembly, the propulsion assembly comprises a propulsion mechanism 12 and a three-position four-way electromagnetic valve 8, the advancing and retreating of the propulsion mechanism are controlled by the three-position four-way electromagnetic valve 8, the rotary assembly comprises a rotary mechanism 11 and a regulating electromagnetic reversing valve 7, the forward and reverse rotation of the rotary mechanism 11 is realized by the regulating electromagnetic reversing valve 7, the drill rod assembly comprises a drill rod 15 and an impact piston 14, the drill rod 16 is contacted with a drill rod 15 through the propelling mechanism, the impact mechanism drives an impact piston 14 to reciprocate to impact a drill rod tail of the drill rod, the head of the drill rod impacts and breaks the rock, the propelling assembly further comprises a propelling pressure control valve 10, the propelling pressure control valve 10 is arranged between the propelling mechanism 12 and the three-position four-way electromagnetic valve 8, the impacting assembly further comprises a high-pressure energy accumulator 17, the high-pressure energy accumulator is connected with the impacting mechanism 13, the high-pressure energy accumulator 17 absorbs pressure impact and provides energy required by piston movement, the high-pressure energy accumulator 17 comprises an inner cavity, an outer cavity, a diaphragm 19 arranged in the middle of the high-pressure energy accumulator 17 and an energy accumulator cover 3, high-pressure nitrogen is input into the outer cavity, and pressure oil in the inner cavity enters and exits from an oil inlet and return pipe through the. In the scheme, the high-pressure accumulator 17 absorbs redundant flow supplied by the oil pump at the beginning and return stages of the piston stroke and provides peak flow required by piston motion at the later stage of the stroke; absorbing pressure shocks to reduce pressure spikes and extend their useful life. Therefore, the high-pressure energy accumulator is structurally composed of an inner cavity, an outer cavity and a lower cavity, the middle of the high-pressure energy accumulator is divided by a diaphragm, the volumes of the high-pressure energy accumulator are approximately equal, high-pressure nitrogen is input into the outer cavity, and pressure oil in the inner cavity enters and exits from an oil inlet and return pipe through an energy accumulator cover, as shown in figure 3. When the impact device works normally, the diaphragm structure shown in fig. 3 is adopted, so that the vibration frequency of the diaphragm is close to that of the impactor, and the distance from the middle position of the diaphragm to the middle position is basically equal when the diaphragm vibrates, so that the rear collision can be effectively prevented.
Example 2: referring to fig. 4, the shank end and the end face of the impact piston are provided with impact pads 20, which effectively prevent the shank end and the end face of the impact piston from being damaged. The rest of the structure and advantages are exactly the same as those of embodiment 1.
Example 3: referring to fig. 4, the connection between the drill rod and the impact mechanism is provided with a vibration isolating gasket 21. Not only can protect the drill rod seat and the impact body seat from generating cracks and the like, but also can play a role in sealing and prevent the leakage of pressure oil. The rest of the structure and advantages are exactly the same as those of embodiment 1.
The working principle is as follows: referring to fig. 1-4, the hydraulic rock drill mainly comprises a propelling mechanism, an impact mechanism and a swing mechanism, the working principle of the hydraulic rock drill is shown in fig. 1, a one-way pump (2, 5) is respectively driven by motors (3, 6) to supply oil to a system, a pilot overflow valve (1, 4) is adopted to adjust the inlet pressure of the system, the propelling mechanism 12 in the drawing advances and retreats by an adjusting electromagnetic reversing valve 8, the reciprocating motion of the impact mechanism 13 is realized by a double-nozzle baffle plate electric feedback type electro-hydraulic servo valve 9, and the positive and negative rotation of the swing mechanism 11 is realized by an adjusting electromagnetic reversing valve 7. The propelling mechanism makes a drill rod 15 of the rock drill fully contact with rocks 16, then the impact mechanism drives an impact piston 14 to reciprocate to impact a shank of the drill rod, the head of the drill rod impacts the rocks to break the rocks, and finally the broken rocks are cut and fall off by a cutter connected with the rotating mechanism.
The present invention can also combine any one or more of the technical features described in embodiments 2 and 3 with embodiment 1 to form a new embodiment.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent changes and substitutions made on the basis of the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.
Claims (10)
1. The utility model provides a frequency-adjustable resonance formula hydraulic rock drill which characterized in that, the rock drill includes propulsion subassembly, strikes subassembly, gyration subassembly, power pack and drill rod subassembly, power pack drives propulsion subassembly, strikes subassembly and gyration subassembly respectively, strike the subassembly and drive the drill rod subassembly and contact with the rock, strike the breakage with rock, strike the subassembly and include double nozzle shelves board electric feedback formula electro-hydraulic servo valve and impact mechanism, the reciprocating motion of impact mechanism is controlled the realization by double nozzle shelves board electric feedback formula electro-hydraulic servo valve.
2. The frequency-adjustable resonance hydraulic rock drill according to claim 1, characterized in that the power assembly comprises a first motor, a second motor, a first check valve, a second check valve, a first pilot overflow valve and a second pilot overflow valve, the first motor drives the first check valve to supply oil to the system, the first pilot overflow valve is used for controlling to supply power to the rotation assembly and the propulsion assembly, the second motor drives the second check valve to supply oil to the system, and the second pilot overflow valve (4) is used for controlling to supply power to the impact assembly.
3. The frequency adjustable resonant hydraulic rock drill according to claim 2, wherein the propulsion assembly includes a propulsion mechanism and a three-position four-way solenoid valve, the forward and reverse of the propulsion mechanism being controlled by the three-position four-way solenoid valve.
4. The frequency-tunable resonant hydraulic rock drill according to claim 3, wherein the swing assembly includes a swing mechanism and a modulating solenoid directional valve, and forward and reverse rotation of the swing mechanism is achieved by the modulating solenoid directional valve.
5. The frequency adjustable resonant hydraulic rock drill according to claim 4, wherein the drill rod assembly includes a drill rod and an impact piston, the advancing mechanism brings the drill rod into contact with the rock, the impact mechanism drives the impact piston to reciprocate to strike a shank of the drill rod, and a head of the drill rod breaks the rock.
6. the frequency tunable resonant hydraulic rock drill according to claim 5, wherein the propulsion assembly further includes a propulsion pressure control valve disposed between the propulsion mechanism 12 and the three-position, four-way solenoid valve.
7. The frequency adjustable resonant hydraulic rock drill according to claim 6, wherein the impact assembly further includes a high pressure accumulator connected to the impact mechanism, the high pressure accumulator absorbing pressure impacts and providing the energy required for piston movement.
8. The frequency-adjustable resonant hydraulic rock drill according to claim 7, wherein the high-pressure accumulator comprises an inner cavity, an outer cavity, a diaphragm arranged in the middle, and an accumulator cover, the outer cavity is used for inputting high-pressure nitrogen, and pressure oil in the inner cavity enters and exits from an oil inlet and return pipe through the accumulator cover.
9. The frequency adjustable resonant hydraulic rock drill according to claim 8, characterized in that the shank tail and the end face of the impact piston are provided with impact blocks.
10. The frequency adjustable resonant hydraulic rock drill according to claim 9, characterized in that the connection of the drill rod and the impact mechanism is provided with a vibration isolating gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920471714.9U CN209780748U (en) | 2019-04-09 | 2019-04-09 | Frequency-adjustable resonance type hydraulic rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920471714.9U CN209780748U (en) | 2019-04-09 | 2019-04-09 | Frequency-adjustable resonance type hydraulic rock drill |
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| Publication Number | Publication Date |
|---|---|
| CN209780748U true CN209780748U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920471714.9U Expired - Fee Related CN209780748U (en) | 2019-04-09 | 2019-04-09 | Frequency-adjustable resonance type hydraulic rock drill |
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| CN (1) | CN209780748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216828A (en) * | 2021-06-21 | 2021-08-06 | 桂林航天工业学院 | Supporting leg type full-hydraulic rock drill |
-
2019
- 2019-04-09 CN CN201920471714.9U patent/CN209780748U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216828A (en) * | 2021-06-21 | 2021-08-06 | 桂林航天工业学院 | Supporting leg type full-hydraulic rock drill |
| CN113216828B (en) * | 2021-06-21 | 2022-06-10 | 桂林航天工业学院 | Supporting leg type full-hydraulic rock drill |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 Termination date: 20210409 |
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| CF01 | Termination of patent right due to non-payment of annual fee |