CN220932188U - Impact frequency detection device of hydraulic rock drill - Google Patents
Impact frequency detection device of hydraulic rock drill Download PDFInfo
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- CN220932188U CN220932188U CN202322811310.9U CN202322811310U CN220932188U CN 220932188 U CN220932188 U CN 220932188U CN 202322811310 U CN202322811310 U CN 202322811310U CN 220932188 U CN220932188 U CN 220932188U
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- impact
- hall sensor
- sensor
- rock drill
- magnetic field
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- 239000011435 rock Substances 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000003595 mist Substances 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses an impact frequency detection device of a hydraulic rock drill, which comprises a sensor fixing joint arranged at the tail part of a valve sleeve, wherein a mounting hole penetrating along the axial direction of the sensor fixing joint is arranged on the sensor fixing joint, a Hall sensor is arranged in the mounting hole and can be accommodated in a hollow hole position of the impact piston in a clearance manner to sense the stroke position of the impact piston, and the impact frequency detection device further comprises a signal acquisition system, wherein a signal output by the Hall sensor is transmitted to the signal acquisition system, and the signal acquisition system acquires impact frequency data. The impact frequency detection device magnetizes the impact piston through a magnetic field area generated by the Hall sensor, so that the magnetic field intensity of the magnetic field area of the sensor is enhanced, the sensor senses the magnetic field intensity change and sends out signal information, the impact frequency value can be obtained by detecting the number of signals in unit time, the non-contact measurement is realized, the vibration resistance and the oil mist resistance are realized, and the detection precision is high.
Description
Technical Field
The utility model relates to the technical field of rock drill testing, in particular to an impact frequency detection device of a hydraulic rock drill.
Background
The hydraulic rock drill is mainly used for the construction of facilities such as mining area exploitation, geological exploration, tunnel construction and the like. In the practical engineering application process, the hydraulic rock drill has the characteristics of high rock breaking efficiency, less environmental pollution, high operation safety, convenient control and the like compared with other rock breaking machines. At present, the impact frequency of the hydraulic rock drill is tested by adopting modes such as photoelectricity, stress pulse, pipeline pressure pulsation, high-speed camera and the like.
However, most of the above methods have low accuracy and high environmental requirements, and cannot measure the impact frequency of the rock drill for a long time under severe environments with multiple dust and concentrated water mist.
For example, in a method for measuring impact frequency of a rock drill by a high-speed camera provided in a test device and a method for measuring impact energy of a rock drill based on a high-speed camera method in chinese patent CN 115962877A, the high-speed camera measurement has high requirements on site, and detailed displacement calibration and other operations are required during operation, so that an independent analysis system is required, and the method is not suitable for places with severe environments and has high cost. In another example, a detection method of a non-contact laser displacement sensor is provided in chinese patent CN115356142B, a system and a method for detecting performance of a hydraulic rock drill, and the photoelectric detection method is to install a laser displacement sensor at the tail of a piston to detect displacement of the piston, and the method can test displacement and speed of the piston, and can also measure an impact frequency value through calculation. However, photoelectric detection is easily affected by water mist and dust, and the impact piston or the sensing part is required to be exposed in the air, so that the impact piston of the hydraulic rock drill is greatly affected in lubrication and cooling, cannot be used in a severe environment and is not suitable for long-time testing. In addition, with hollow pistons, detection is not possible with this method.
Disclosure of utility model
The utility model aims to solve the technical problems that the impact frequency measuring device for the hydraulic rock drill in the prior art is complex, low in accuracy and high in environmental requirement, and the impact frequency of the hydraulic rock drill cannot be measured for a long time under the severe environments of multiple dust and concentrated water mist.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
The utility model provides an impact frequency detection device of a hydraulic rock drill, which is used for detecting the impact frequency of an impact mechanism of the hydraulic rock drill, wherein the impact mechanism of the hydraulic rock drill comprises a valve sleeve and an impact piston arranged in the valve sleeve, and the impact piston is provided with a hollow hole site.
Further, the hall sensor is arranged coaxially with the impact piston.
Further, the hall sensor is eccentrically arranged with the impact piston.
Further, the Hall sensor is not more than 2mm away from the edge of the hollow hole of the impact piston.
Compared with the prior art, the impact frequency detection device of the hydraulic rock drill has the following beneficial effects:
The impact frequency detection device comprises a Hall sensor which can enter a hollow hole of an impact piston in a clearance way, wherein the Hall sensor generates a magnetic field which can magnetize the impact piston in the area, the magnetized impact piston enhances the magnetic field intensity of the magnetic field, the Hall sensor senses the change of the magnetic field intensity and generates level signals, and the impact frequency value can be obtained by detecting the number of the signals in unit time. The stroke position of the impact piston is sensed through the magnetic field change, so that non-contact measurement is realized, the stability is high, the shock resistance and oil mist resistance are realized, and the impact piston can work in a severe environment. And the magnetic field area scope that hall sensor produced is less, and magnetic field intensity is also weaker, and the distance is nearer when hall sensor is located the cavity hole site of impact piston, and detection accuracy is high, can not receive the interference of other iron spare parts of hydraulic rock drill, and the level signal collection that hall sensor produced is convenient, and is with low costs.
Drawings
Fig. 1 is a schematic diagram of an impact frequency detection device of a hydraulic rock drill according to the present embodiment;
Fig. 2 is a schematic view of the impact frequency detecting device according to the present embodiment in which the hall sensor and the impact piston are eccentrically arranged;
fig. 3 is a schematic diagram of an impact piston in a tail mechanical limit position in the impact frequency detecting device according to the present embodiment;
Fig. 4 is a schematic diagram of an induction zone of the impact piston in a tail non-mechanical limit position in the impact frequency detection device according to the present embodiment;
Fig. 5 is a schematic diagram of an induction zone of the impact piston at a tail induction critical position in the impact frequency detection device according to the present embodiment;
FIG. 6 is a schematic diagram of the impact piston in the tail non-sensing area in the impact frequency detecting device according to the present embodiment;
FIG. 7 is a schematic diagram of the relationship between piston travel position and the level signal generated by the Hall sensor;
the main reference numerals illustrate:
1-valve sleeve; 2-an impulse piston; 21-a hollow hole site; 3-limiting blocks; 4-a housing; 5-sensor fixed joint; a 6-hall sensor; 7-sensor magnetic field area.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; may be a communication between the interiors of two elements; may be directly or indirectly through an intermediate medium, and the specific meaning of the terms in the present utility model will be understood by those skilled in the art in specific cases.
The embodiment provides an impact frequency detection device of a hydraulic rock drill, which is used for detecting the impact frequency of an impact mechanism of the hydraulic rock drill, and referring to fig. 1, the impact mechanism of the hydraulic rock drill comprises a valve sleeve 1 fixedly arranged and an impact piston 2 arranged in the valve sleeve 1, a hollow hole site 21 is arranged on the impact piston 2, and the impact piston 2 can move left and right in the valve sleeve 1 under the control of a hydraulic control oil way. The tail part of the valve sleeve 1 is provided with a limiting block 3, and the limiting block 3 is used for limiting the limiting position of the impact piston 2 when moving towards the tail part of the valve sleeve 1, so as to play a role in protection. The impact mechanism is located in a housing 4 of the hydraulic rock drill, the housing 4 being adapted to secure and protect its internal structural components.
The impact frequency detection device comprises a sensor fixing joint 5 arranged at the tail part of the valve sleeve 1, an axial through mounting hole is formed in the sensor fixing joint 5, a Hall sensor 6 is arranged in the mounting hole, the Hall sensor 6 can be accommodated in a hollow hole position 21 of the impact piston in a clearance manner, the Hall sensor is not contacted with the edge of the hollow hole position 21, but has a small distance, and the position of the Hall sensor at the edge of the hollow hole position of the impact piston is not more than 2mm in the embodiment. The sensor fixing joint 5 is of a step shape, the small end is fixedly connected with the limiting block 3 in a threaded mode, and the sensor fixing joint 5 of the step shape can seal the hydraulic rock drill shell 4 and fix the hydraulic rock drill shell 4 and the limiting block 3 because oil mist lubrication gas exists in the rock drill. When the hall sensor 6 is fixed, a gasket or the like may be used for sealing, or the hall sensor may be formed in a stepped shape for sealing.
The impact frequency detection device further comprises a signal acquisition system, data generated by the Hall sensor are sent to the signal acquisition system, and the signal acquisition system obtains impact frequency data.
The Hall sensor is a magnetic sensor, takes the Hall effect as the working basis, and is an integrated sensor composed of a Hall element and an accessory circuit thereof. The magnetic field and its change can be detected by using it, and can be used in various occasions related to magnetic field.
In this embodiment, the hall sensor 6 forms a sensor field area 7 near the head area of the percussion piston 2, which area is relatively small in extent, and the sensor field area 7 can magnetize the percussion piston 2 into this area without magnetizing other iron parts of the hydraulic rock drill. The magnetized impact piston 2 further enhances the magnetic field strength of the sensor magnetic field area 7, and the circuit inside the Hall sensor 6 can detect the strength change of the magnetic field and further output a level signal.
Since the hall sensors have smaller size specifications, M8, M10, M12, M16, etc. are common, but the central hole of the impact piston has different sizes. Therefore, in the concrete implementation, the hall sensor with proper size can be configured to be coaxially arranged with the impact piston according to the size of the center hole site of the actual hall sensor and the impact piston, or the hall sensor and the impact piston are eccentrically arranged, so that the detection distance of the hall sensor is met, accurate detection is realized, and the eccentric arrangement mode is specifically shown in fig. 2.
In the process of sensing the impact piston 2 of iron, the hall sensor 6 and the impact piston 2 form 4 position areas, see fig. 3-7, which are respectively a sensing area of a tail mechanical limit position, a tail non-mechanical limit position, a tail sensing critical position and a tail non-sensing area. The hall sensor 6 can detect signals in the tail mechanical limit position, the tail non-mechanical limit position sensing area and the tail sensing critical position area, and can not detect signals in the tail non-sensing area range, so that each stroke of the impact piston 2 can form a square wave signal, and the impact frequency value of the hydraulic rock drill can be obtained by detecting the square wave quantity of the signals in unit time.
The impact frequency detection device comprises a Hall sensor which can enter a hollow hole of an impact piston in a clearance way, wherein the Hall sensor generates a magnetic field which can magnetize the impact piston in a magnetic field area, the magnetized impact piston enhances the magnetic field intensity of the magnetic field, the Hall sensor senses the change of the magnetic field intensity and sends out a signal, and the impact frequency value can be obtained by detecting the number of signals in unit time. The stroke position of the impact piston is sensed through the magnetic field change, so that the non-contact measurement is realized, the shock resistance and the oil fog resistance are realized, and the impact piston can work in a severe environment. And the detection precision is high, and the measurement of more than 1000Hz can be satisfied by improving the sampling frequency of the Hall sensor. The control system of the hydraulic rock drill can be accessed in the concrete implementation, complex software configuration is not needed, and the cost is low.
In summary, the foregoing description is only of the preferred embodiments of the utility model, and is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.
Claims (4)
1. An impact frequency detection device of a hydraulic rock drill is used for detecting the impact frequency of an impact mechanism of the hydraulic rock drill, the impact mechanism of the hydraulic rock drill comprises a valve sleeve (1) and an impact piston (2) arranged in the valve sleeve, the impact piston is provided with a hollow hole site (21), and is characterized in that,
The impact frequency detection device comprises a sensor fixing joint (5) arranged at the tail part of the valve sleeve, an axially through mounting hole is formed in the sensor fixing joint, a Hall sensor (6) is arranged in the mounting hole, the Hall sensor can be accommodated in a hollow hole of the impact piston in a clearance mode, the Hall sensor can generate a sensor magnetic field area (7) and magnetize the impact piston positioned in the area, the magnetized impact piston changes the magnetic field intensity of the sensor magnetic field area, the Hall sensor senses a change output signal of the magnetic field intensity and further comprises a signal acquisition system, and a signal output by the Hall sensor is transmitted to the signal acquisition system, and the signal acquisition system acquires impact frequency data.
2. The impact frequency detecting device of a hydraulic rock drill according to claim 1, wherein the hall sensor is provided coaxially with the impact piston.
3. The impact frequency detecting device of a hydraulic rock drill according to claim 1, wherein the hall sensor is arranged eccentrically to the impact piston.
4. The impact frequency detecting device of a hydraulic rock drill according to claim 1, wherein the hall sensor is located at a distance of not more than 2mm from the edge of the hollow hole of the impact piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322811310.9U CN220932188U (en) | 2023-10-19 | 2023-10-19 | Impact frequency detection device of hydraulic rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322811310.9U CN220932188U (en) | 2023-10-19 | 2023-10-19 | Impact frequency detection device of hydraulic rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220932188U true CN220932188U (en) | 2024-05-10 |
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ID=90933844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322811310.9U Active CN220932188U (en) | 2023-10-19 | 2023-10-19 | Impact frequency detection device of hydraulic rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220932188U (en) |
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2023
- 2023-10-19 CN CN202322811310.9U patent/CN220932188U/en active Active
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