CN214697835U - Pick device capable of monitoring wear state in real time and coal cutter roller - Google Patents
Pick device capable of monitoring wear state in real time and coal cutter roller Download PDFInfo
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- CN214697835U CN214697835U CN202121076183.7U CN202121076183U CN214697835U CN 214697835 U CN214697835 U CN 214697835U CN 202121076183 U CN202121076183 U CN 202121076183U CN 214697835 U CN214697835 U CN 214697835U
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Abstract
The utility model relates to a cutting pick device and a coal cutter roller which can monitor the abrasion state in real time, comprising a cutting pick lantern ring, a cutting pick and an optical fiber sensor; the cutting pick comprises a pick head and a pick body, the pick head is arranged in a groove on the end face of the pick body, a mounting hole is arranged along the central axis of the pick body and the pick head, and the mounting hole penetrates through the pick body and extends into the pick head; the optical fiber sensor is embedded into the mounting hole, and the tail end of the optical fiber sensor is fixedly packaged with the cutting pick lantern ring. The utility model discloses can survey the wearing and tearing state of pick head and cutting pick body under the not influenced prerequisite of the structure of guaranteeing the pick.
Description
Technical Field
The utility model belongs to the technical field of coal mine machinery, especially, relate to but pick device and cylinder of real time monitoring wearing and tearing state.
Background
At present, with the rapid development of the industrialization process, various mines basically realize mechanized or semi-mechanized mining operation, but accompanying this, corresponding machines and tools are matched with the large-scale industrialization production. The most main mining tool is comprehensive mechanized coal mining equipment, and a roller of the coal mining equipment is a key device for mining coal; the roller is arranged at the tail end of the swing arm of the coal mining machine, the roller penetrates into a coal seam to be mined and rotates, the cutting teeth on the roller perform coal mining, and the collected coal mine flows to the output unit through the spiral channel of the roller; the roller drives the rotary working, and the cutting pick is axially static relative to the cutting pick sleeve ring and the tooth holder; the cutting teeth form radial low-speed continuous rotation in the cutting tooth lantern ring due to the mining work; the cutting pick is a core part for coal mining and rock breaking by a roller and is also a vulnerable part; and because the working conditions are severe, different geological loss periods have certain difference.
The existing determination of the degree of wear of a cutting pick is mainly determined by periodic inspection, and the cutting pick is replaced when the degree of wear is detected to be high.
However, periodic wear state detection is often involved at a later time, and the focus of targeted wear detection is on the pick body. The real-time tracking of the continuous change of the abrasion state of the cutting pick is realized by timely and effectively measuring the abrasion curves of the pick head and the pick body, the abrasion performance of the cutting pick is evaluated, and the abnormal damage of the cutting pick is predicted, which is a problem to be solved urgently in the current mining operation.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the above-mentioned prior art, the utility model aims to provide a but real time monitoring wearing and tearing state's pick device and cylinder can survey the wearing and tearing state of pick and cutting tooth body under the not influenced prerequisite of the structure of guaranteeing the pick.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
in a first aspect, the utility model provides a cutting pick device with a wear sensing device, which comprises a cutting pick lantern ring, a cutting pick and an optical fiber sensor,
the cutting pick comprises a pick head and a pick body, the pick head is arranged in a groove on the end face of the pick body, a mounting hole is formed along the central axes of the pick body and the pick head, and the mounting hole penetrates through the pick body and extends into the pick head;
the optical fiber sensor is implanted into the mounting hole, and the tail end of the optical fiber sensor is fixedly packaged with the cutting pick lantern ring.
The optical fiber sensor comprises an optical fiber and a sheath, wherein the sheath and the optical fiber are compounded into the optical fiber sensor through a micropore fixed point glue injection process.
The optical fiber sensor is provided with sensing units as measuring points at different distance positions in a grading manner.
The pick device further comprises data acquisition equipment, the data acquisition equipment is in communication connection with the rear end of the optical fiber sensor, and the acquired wear signals are transmitted to the monitoring terminal in real time.
The optical fiber sensor is implanted into the mounting hole through a fixing ring, the fixing ring is fixedly connected with the cutting pick lantern ring, an inner hole of the fixing ring is filled into the optical fiber sensor, the tail end of the optical fiber sensor penetrates through the fixing ring to be connected with the female joint, and the fixing ring and the female joint are fixed to achieve the implantation of the optical fiber sensor.
The pick device further comprises a quick connector, the tail end of the optical fiber sensor is fixedly connected with the quick connector through the female connector, the optical fiber sensor is in communication connection with the data acquisition equipment through the quick connector, and the optical fiber sensor is implanted and taken out through the disassembly and connection of the quick connector.
The sensing units of the measuring point are fiber grating measuring points, the length of each sensing unit is 5mm, the interval between every two adjacent sensing units is 3-20mm, the aperture of each mounting hole is not more than 5mm, the diameter of each optical fiber is 0.25-0.5 mm, and the outer diameter of each sheath is 2-3 mm.
The data acquisition equipment transmits a light signal to the optical fiber sensor, receives a reflected light signal of a measuring point and analyzes the wavelength change of the reflected light signal;
and after the sensing unit of the measuring point is worn, the reflected light signal of the monitoring terminal at the sensing unit disappears, so that the cutting tooth wear state of the corresponding position of the sensing unit is measured.
The pick wear state of the corresponding position where the sensing unit is located is measured and displayed through an interface of the monitoring terminal, and the interface display is designed and configured into two modes, namely a basic mode and/or a compound mode;
in the basic mode, the abrasion state is calculated according to the length L of the measuring points and the distance N between the measuring points, and the formula of the abrasion length of the cutting tooth is as follows:
Lwear and tearL1+ L2+ … Li + N1+ N2+ … N (i-1), wherein i is a measuring point number of disappearance of the reflection signal;
in the compound mode, the abrasion state is calculated according to the length L of the measuring points and the distance N between the measuring points, and the formula of the abrasion length of the cutting tooth is as follows:
Lwear and tearThe measurement method comprises the steps of (L1+ L2+ … Li + N1+ N2+ … N (i-1)) + Ni T/KT, wherein i is the number of a measuring point where a reflection signal disappears, T is the time elapsed from the point i immediately after the reflection signal disappears, T is the total time length of Ni abrasion preset by a system, and K is a time coefficient and is related to the hardness and softness of a coal seam.
In a second aspect, the present invention provides a shearer drum provided with the above-mentioned pick device.
Compared with the prior art, the utility model discloses can realize in time effectual wearing and tearing state of finding the pick head and cutting the pick body under the not influenced prerequisite of the structure of guaranteeing the pick, promote the operation safety, excavator work efficiency, reduce cost.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 is a schematic structural view showing a cutting pick apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural view showing a cutting pick according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating a light sensor according to an embodiment of the present invention;
fig. 4 is a sensing schematic diagram illustrating an optical fiber sensor according to an embodiment of the present invention;
figure 5 is a schematic diagram illustrating the action curve of broadband light after entering an optical fiber sensor according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view showing a cutting pick apparatus according to an embodiment of the present invention;
figure 7 is a monitoring schematic diagram showing a cutting pick apparatus according to an embodiment of the present invention;
figure 8 is a schematic diagram showing wear length versus time in a basic mode of a cutting pick arrangement according to an embodiment of the invention;
fig. 9 is a schematic diagram showing the wear length versus time in a combined mode of a cutting pick apparatus according to an embodiment of the present invention.
Description of reference numerals:
1-cutting pick lantern ring, 11-snap ring, 2-cutting pick, 21-pick head, 22-cutting pick body, 23-mounting hole, 3-optical fiber sensor, 31-optical fiber, 32-sheath, 33-measuring point, 4-data acquisition equipment, 5-fixing ring, 61-female joint, 62-quick joint, 7-pick seat and 8-monitoring terminal.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
The following describes in detail alternative embodiments of the present invention with reference to the accompanying drawings.
Example one
As shown in fig. 1 and 2, a pick apparatus having a wear sensing apparatus includes a pick collar 1, a pick 2, and a fiber optic sensor 3.
Pick 2 and pick lantern ring 1 pass through snap ring 11 fixed connection, and snap ring 11 is fixed in on toothholder 7 pick 2 and pick lantern ring 1 jointly. The cutting pick 2 and the cutting pick lantern ring 1 are fixedly connected through a first clamping ring groove positioned at the tail part of the cutting pick body 22, a second clamping ring groove matched with the corresponding position of an inner hole of the cutting pick lantern ring 1, and a clamping ring 11 positioned in the first clamping ring groove and the second clamping ring groove, wherein the clamping ring 11 is a piston type clamping ring;
the outer side of the root part of the cutting pick lantern ring 1 is provided with a shaft snap ring, and the shaft snap ring is matched with the end part of the cutting pick lantern ring 1 to connect the cutting pick lantern ring 1 and the tooth holder 7 into a whole.
The cutting pick 2 comprises a pick head 21 and a pick body 22, the pick head 21 is mounted in a groove on the end face of the pick body 22, and the pick head 21 and the pick body 22 can be connected in a threaded manner or a welded manner, which is not limited specifically herein.
A mounting hole 23 is formed along the central axis of the cutting pick body 22 and the cutting pick head 21, and the mounting hole 23 penetrates through the cutting pick body 22 and extends into the cutting pick head 21; the optical fiber sensor 3 is embedded into the mounting hole 23, and the tail end of the optical fiber sensor 3 is fixedly packaged with the cutting pick lantern ring 1. The optical fiber sensor 3 is embedded into the mounting hole 23, the tail end of the optical fiber sensor 3 is fixedly packaged with the cutting pick lantern ring 1, and meanwhile, the fact that the mounting hole 23 extends into the pick head 21 can be guaranteed, and real-time tracking of abrasion detection can be started from abrasion of the pick head 21.
Example two
On the basis of the first embodiment, the present embodiment may further include the following:
referring to fig. 3, the optical fiber sensor 3 of the present embodiment may include an optical fiber 31 and a sheath 32, the optical fiber sensor 3 may be provided with sensing units as measuring points 33 at different distance positions in stages, and the sheath 32 and the optical fiber 31 cover the optical fiber sensor 3 through a micropore fixed point glue injection process, which may ensure that the measuring points 33 do not affect each other in a wear process. Furthermore, the diameter of the optical fiber 31 is 0.25-0.5 mm, the outer diameter of the sheath 32 is 2-3 mm, and the size of the sheath 32 mainly aims to consider that the aperture of the mounting hole 23 of the cutting tooth 2 is not larger than 5mm, and a certain gap is ensured to exist between the sheath 32 and the optical fiber 31, so that the sheath 32 is not influenced in the rotation process of the cutting tooth 2, and the aperture of the mounting hole 23 is not larger than 5mm, so that the abrasion states of the tooth head 21 and the cutting tooth body 22 can be timely and effectively measured on the premise that the structure of the cutting tooth 2 is not influenced, the operation safety is improved, the working efficiency of the mining machine is improved, and the cost is reduced; in addition, the sheath 32 is made of 304 stainless steel, and in order to ensure a vertical state (an implanted state) under the condition that the optical fiber sensor 3 is not constrained by the side wall of the cutting pick 2, the sheath 32 has a smooth surface and certain strength, and the smooth surface can reduce the friction force with the side wall so as not to rotate together with the cutting pick 2.
Because the outer diameter of the sheath 32 is less than 5mm, the light ray sensor cannot generate structural damage to the cutting pick 2 in the operation process of the cutting pick 2; since only the hard alloy head of the head part, the outer peripheral surface of the front end of the cutting pick 2 and the step are stressed when the cutting pick 2 is used for mining coal, the installation hole 23 with the inner diameter of 5mm formed in the central axis of the cutting pick 2 does not have mechanical and functional influence on the cutting pick 2.
Referring to fig. 4 to 6, in an application scenario, the optical fiber sensor 3 of the present embodiment is implanted into the mounting hole 23 through the fixing ring 5, the fixing ring 5 is in threaded connection with the pick collar 1, the inner hole of the fixing ring 5 is installed in the optical fiber sensor 3, the tail end of the optical fiber sensor 3 passes through the fixing ring 5 to be connected with the female connector 61, and the fixing ring 5 and the female connector 61 are fixed to achieve implantation of the optical fiber sensor 3. Specifically, the implantation process of the optical fiber sensor 3 in the present embodiment includes: the optical fiber 31 and the sheath 32 are combined into an integral optical fiber sensor 3, then the processed optical fiber sensor 3 passes through the fixing ring 5, and the fixing ring 5 is connected and fixed with the female connector 61 through an inner hole; and then the optical fiber sensor 3 integrated with the fixing ring 5 and the female joint 61 is inserted into and fixed in the pick collar 1 from the bottom of the pick collar 1, the pick 2 is inserted into the pick collar 1 from the top of the pick collar 1, the optical fiber sensor 3 is inserted into the mounting hole 23 of the pick 2, and the pick 2 and the pick collar 1 are assembled into a whole. At this time, the cutting pick 2, the optical fiber sensor 3 (including the fixing ring 5 and the female connector 61) and the cutting pick collar 1 are assembled into a whole, thereby completing the secondary packaging of the cutting pick 2. When the cutting pick 2 works and operates, the cutting pick 2 rotates, and the optical fiber sensor 3 and the cutting pick sleeve ring 1 are kept relatively static. The cutting pick 2 will wear itself due to production, when it wears to the position of the optical fiber sensor 3, the optical fiber 31 will be worn rapidly along with the pick head 21 and the cutting pick body 22, and at this time, the wear degree of the cutting pick 2 can be judged according to the wear degree of the optical fiber 31.
The cutting pick device further comprises a quick connector 62, the tail end of the optical fiber sensor 3 is fixedly connected with the quick connector 62 through a female connector 61, and the optical fiber sensor 3 can be implanted and taken out through the disassembly and connection of the quick connector 62 and the female connector 61. In an application scenario, when the cutting tooth 2 needs to be replaced, the cutting tooth 2 and the worn optical fiber sensor 3 can be simultaneously drawn out by detaching the quick connector 62 and the snap ring 11; and installing a new cutting pick 2 with the optical fiber sensor 3 packaged, and reconnecting the quick connector 62 and the female connector 61, namely, completing the replacement work of the cutting pick 2, and restarting the shearer.
EXAMPLE III
On the basis of the above embodiment, the present embodiment may further include the following:
as shown in fig. 6-9, the optical fiber sensor 3 is in communication connection with the data acquisition device 4 through the quick connector 62, the data acquisition device 4 transmits a light signal to the optical fiber sensor 3, each measuring point 33 of the optical fiber 31 reflects the light signal, and the data acquisition device 4 receives the light signal reflected by each measuring point 33 and transmits the light signal to the monitoring terminal 8 so as to display the wear state of the cutting pick 2 in real time. Optical signals are transmitted in the optical fiber sensor 3, transmission is stable and reliable, and the cutting teeth 2 can be effectively made to adapt to the severe working environment of the ground bottom. Particularly, the stability test can be ensured under the water environment; the interference of electromagnetic signals generated in the operation process of the coal mining machine is avoided.
The optical fiber sensor 3 utilizes the photosensitive characteristic of the optical fiber material, namely that external incident photons interact with germanium ions in the optical fiber 31 to form permanent change of refractive index, and forms a spatial phase grating in the optical fiber 31, thereby changing and controlling the propagation behavior of light therein. The refractive index of the grating is in fixed periodic modulation distribution along the axial direction of the optical fiber, and the grating is a uniform grating and has good wavelength selectivity. As shown in B, C, D graph of fig. 5, when broadband light enters the optical fiber, the incident light with a wavelength satisfying a specific condition is coupled and reflected at the grating, the rest of the wavelengths of light will pass through the grating without being affected, and the reflection spectrum is at the central wavelength λ of the optical fiber sensor 3BWhere a peak occurs.
As shown in the graph C in fig. 5, the optical fiber sensor 3 reflects light with a specific wavelength, which satisfies the following condition, formula one:
λB＝2nefflambda formula one
In the formula, λBIs the center wavelength of the reflected light; n iseffIs the effective index of the core; and Λ is the spatial period of the fiber grating refractive index modulation.
As shown in graph A in FIG. 5, the external stress and temperature variation cause the refractive index and the grating pitch to change, resulting in the wavelength λ of the optical fiber sensorBSatisfies the linear relation, formula two:
in the formula, delta lambdaIs the variation of wavelength of optical fiber sensor, epsilon is the axial strain of optical fiber, Delta T is the temperature variation, PεThe photoelastic coefficient of the optical fiber, α, and ζ are the thermal expansion coefficient of the optical fiber. The wavelength demodulation precision of the optical fiber sensor reaches 1pm, the corresponding strain test precision is about 1 microstrain, and the temperature demodulation progress is 0.1 ℃.
In an application scenario, the optical fiber 31 of the embodiment is provided with sensing units at different distance positions (the measuring points 33) in a grading manner, the optical fiber sensor 3 generates reflection signals at each measuring point 33 in an unworn state, when the sensing units at the measuring points 33 are worn, the feedback sensing signals (optical signals) of the sensing units at the monitoring terminal 8 disappear, and the wear state of the cutting tooth 2 is measured in real time according to the condition that the feedback sensing signals disappear (the positions and the lengths of the measuring points 33). The optical fiber sensor 3 of the embodiment is processed in multiple stages, can monitor different stages of abrasion of the cutting tooth 2, the degree of abrasion and the speed of abrasion, realizes real-time tracking of continuous change of the abrasion state of the cutting tooth 2, evaluates the abrasion performance of the cutting tooth 2 and predicts the abnormal damage of the cutting tooth 2. The optical fiber sensor 3 of the embodiment is multi-stage sensing, so that the reliability of wear monitoring is obviously improved; and because the optical fiber 31 is worn and consumed along with the cutting tooth 2 to feed back and monitor the wear loss of the cutting tooth 2, even if the optical fiber 31 is abnormally broken and the optical sensing function of the optical fiber 31 is not damaged, the exposed part of the optical fiber 31 can quickly wear the optical fiber 31 of the exposed part due to a large amount of coal sandstone in the coal mining environment, so that the optical fiber sensor 3 can accurately feed back the wear loss of the cutting tooth 2.
The optical fiber sensors 3 are connected to the data acquisition equipment 4 and are finally in signal connection with the monitoring terminal 8, so that networked monitoring is constructed, a test demodulation system in the detection terminal is modularized, and the abrasion signals can be displayed on the monitoring terminal 8 in an abrasion percentage mode through the processing of the test demodulation system.
The wear state of the cutting tooth 2 at the corresponding position of the sensing unit is displayed through the interface of the monitoring terminal, as shown in fig. 8-9, the wear state of the cutting tooth is output to the interface display of the terminal, and two interface display modes are designed and configured: one is a basic mode and the other is a complex mode.
Basic mode:
as shown in FIG. 8, the wear state is calculated according to the length L of the measuring points and the distance N between the adjacent measuring points, the reflected signal of the first measuring point disappears, the wear length of the cutting tooth is L1, the reflected signal of the ith measuring point disappears, and the wear length of the cutting tooth is LWear and tearL1+ L2+ … Li + N1+ N2+ … N (i-1). This is an accurate wear length value and position monitoring.
The basic mode is that the abrasion state of the cutting tooth is displayed according to the abrasion section/proportion section, the state of the cutting tooth is displayed by a green graph column in the initial state, and the optical fiber sensing units of several levels, namely the graph columns of several levels, are designed and manufactured according to the required monitoring precision; after a specific optical fiber sensing unit measuring point is worn, the demodulator outputs and displays a state that the cutting tooth is worn at an output terminal by taking the disappearance of the reflected signal as a reference; for example, 5 sensing units are arranged and manufactured for the optical fiber sensor, when the first point is worn and the reflected signal disappears, the 5-level/section wear amount of the basic mode interface shows that 20% of wear is completed, and the graph column adjacent to 20% -40% of the section is changed into yellow to show that the graph column is in the process of wear; and the remaining 60% of the bars remain green at this time, indicating that wear has not begun; this pattern does not show real-time wear status for the interval between adjacent stations.
And (3) compounding mode:
as shown in FIG. 9, the wear state is calculated according to the measuring point length L and the distance N between adjacent measuring points, the reflection signal of the first measuring point disappears, the wear length of the cutting pick is L1, the reflection signal of the ith measuring point disappears, and the wear length of the cutting pick is L1+ L2+ … Li + N1+ N2+ … N (i-1). After the reflection signal of the ith measuring point disappears, after time t and before the reflection signal of the (n + 1) measuring point disappears, the abrasion length of the cutting tooth is LWear and tear＝(L1+L2+…Li+N1+N2+…N(i-1))+Ni*t/KT，
t represents the time elapsed from the point n at which the reflected signal disappears, in units: the time is as long as the reaction time is short,
t represents the total time length of Ni abrasion preset by the system, and the unit is as follows: the time is as long as the reaction time is short,
k represents a time coefficient and is related to the hardness and softness of the coal bed.
The output interface display mode considers the working environment, namely the hardness grade of the coal bed, into an interface program, and can be divided into three grades of soft coal, medium hard coal and hard coal; the three levels are respectively preset with three time coefficients, namely representing the wear speed; based on the mode, the interface output displays the specific state of abrasion in real time, and with the difference of various working conditions, precision errors exist, but the errors are controllable and meet the requirements of practical application.
Example four
The coal mining machine roller is provided with the cutting pick device.
The above description of the preferred embodiments of the present invention is intended to make the spirit of the present invention clearer and more comprehensible, and is not intended to limit the present invention, and all modifications, replacements, and improvements made within the spirit and principles of the present invention should be included within the scope of protection outlined in the claims appended hereto.
Claims (9)
1. A cutting pick device capable of monitoring a wear state in real time comprises a cutting pick lantern ring (1) and an optical fiber sensor (3), and is characterized in that,
the cutting pick (2) comprises a pick head (21) and a pick body (22), the pick head (21) is installed in a groove on the end face of the pick body (22), a mounting hole (23) is formed along the central axes of the pick body (22) and the pick head (21), and the mounting hole (23) penetrates through the pick body (22) and extends into the pick head (21);
the optical fiber sensor (3) is embedded into the mounting hole (23), and the tail end of the optical fiber sensor (3) is fixedly packaged with the cutting pick sleeve ring (1).
2. A cutting pick device according to claim 1, wherein the optical fibre sensor (3) comprises an optical fibre (31) and a sheath (32), the sheath (32) being laminated to the optical fibre (31) by a micro-hole spot-and-glue technique to form the optical fibre sensor (3).
3. A cutting pick arrangement according to claim 2, wherein the fibre optic sensors (3) are arranged in stages of sensing units as measuring points at different distance positions.
4. A cutting pick apparatus according to claim 3, wherein the cutting pick apparatus further comprises a data acquisition device (4), the data acquisition device (4) being in communication with the rear end of the optical fibre sensor (3) for transmitting the acquired wear signal in real time to a monitoring terminal.
5. A cutting pick device as claimed in claim 4, wherein the optical fibre sensor (3) is implanted in the mounting bore (23) through a fixing ring (5), the fixing ring (5) being fixedly connected to the cutting pick collar (1), the inner bore of the fixing ring (5) receiving the optical fibre sensor (3), the trailing end of the optical fibre sensor (3) passing through the fixing ring (5) to be connected to a female connector (61), the fixing ring (5) and the female connector (61) being fixed to effect implantation of the optical fibre sensor (3).
6. A cutting pick apparatus as claimed in claim 5, further comprising a quick connector (62), the rear end of the optical fibre sensor (3) being fixedly connected to the quick connector (62) via the female connector (61), the optical fibre sensor (3) being communicatively connected to the data acquisition device (4) via the quick connector (62), the insertion and removal of the optical fibre sensor (3) being achieved by the removal and attachment of the quick connector (62).
7. A cutting pick apparatus as claimed in claim 3, wherein said sensing units of said measuring station are fibre grating measuring stations, each said sensing unit is 5mm in length, the spacing between adjacent said sensing units is 3-20mm, the aperture of said mounting hole (23) is no greater than 5mm, the diameter of said optical fibre (31) is 0.25-0.5 mm, and the outer diameter of said sheath (32) is 2-3 mm.
8. A cutting pick apparatus according to claim 4, wherein the data acquisition device (4) transmits an optical signal to the optical fibre sensor (3), receives a measure reflected optical signal, analyses the wavelength variation of the reflected optical signal;
after the sensing unit of the measuring point is worn, the reflected light signal of the monitoring terminal at the sensing unit disappears, so that the wear state of the cutting tooth (2) at the corresponding position of the sensing unit is measured.
9. Shearer drum, characterized in that it is provided with a cutting pick arrangement according to any of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121076183.7U CN214697835U (en) | 2021-05-19 | 2021-05-19 | Pick device capable of monitoring wear state in real time and coal cutter roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121076183.7U CN214697835U (en) | 2021-05-19 | 2021-05-19 | Pick device capable of monitoring wear state in real time and coal cutter roller |
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| CN214697835U true CN214697835U (en) | 2021-11-12 |
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