Lens self-cleaning device, lens assembly and coal quality rapid detection device

Abstract

The invention discloses a lens self-cleaning device, a lens assembly and a coal quality fast detection device.The lens self-cleaning device is used for the lens assembly, the lens assembly comprises a lens barrel and a lens, the lens barrel is provided with a mounting hole, the two ends of the lens barrel in the axis direction are the first end and the second end respectively, and the lens is arranged in the mounting hole and arranged at the first end; the lens self-cleaning device comprises a driving assembly which is arranged on the lens barrel and used for driving the lens to rotate, and the rotating axis of the lens is parallel to or coincides with the axis of the lens barrel; and the water spraying piece is arranged on the lens barrel and used for spraying water to the surface, deviating from the second end, of the lens. According to the lens self-cleaning device, dust is wetted by liquid, and a mixture of the liquid and the dust is thrown away by centrifugal force, so that reentrainment of dust in dry cleaning is avoided, non-contact lens cleaning in the whole process is achieved while the cleaning efficiency is guaranteed, abrasion of the lens caused by mechanical wiping is reduced, and the service life of the lens is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of rapid coal quality inspection devices, and particularly to a lens self-cleaning device, a lens assembly, and a rapid coal quality inspection device. Background Art

[0002] In the existing technical solutions, the dust removal technology for the lens of the rapid coal quality inspection device mainly relies on air blowing dust removal and mechanical wiping. The air blowing dust removal has a low dust removal efficiency but less damage to the lens. The mechanical wiping has a high dust removal efficiency, but greater damage to the lens. Therefore, the existing dust removal technology cannot balance the dust removal efficiency and the service life of the lens. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a lens self-cleaning device and a lens assembly. While ensuring the cleaning efficiency, the lens self-cleaning device realizes non-contact cleaning of the lens throughout the process, reduces the wear of the lens caused by mechanical wiping, and improves the service life of the lens.

[0004] The present invention also provides a lens assembly including the above lens self-cleaning device.

[0005] The present invention also provides a rapid coal quality inspection device including the above lens assembly.

[0006] The lens self-cleaning device according to an embodiment of the present invention is used for a lens assembly. The lens assembly includes a lens barrel and a lens. The lens barrel has a mounting hole. The two ends in the axial direction of the lens barrel are respectively a first end and a second end. The lens is disposed in the mounting hole and at the first end. The lens self-cleaning device includes: a driving assembly disposed on the lens barrel for driving the lens to rotate, and the rotation axis of the lens is parallel to or coincides with the axis of the lens barrel; a water spraying member disposed on the lens barrel for spraying water onto the surface of the lens facing away from the second end.

[0007] The lens self-cleaning device according to an embodiment of the present invention, by disposing the driving assembly on the lens barrel to drive the lens to rotate, the rotation axis of the lens is parallel to or coincides with the axis of the lens barrel; and disposing the water spraying member on the lens barrel to spray water onto the surface of the lens facing away from the second end, combines the wetting of dust by liquid and the centrifugal force to throw off the mixture of liquid and dust, avoids the secondary dust generation in dry cleaning, realizes non-contact cleaning of the lens throughout the process while ensuring the cleaning efficiency, reduces the wear of the lens caused by mechanical wiping, and improves the service life of the lens.

[0008] In some embodiments of the present invention, the driving assembly includes: a first driving member disposed in the mounting hole and connected to the lens; a second driving member disposed in the mounting hole for driving the first driving member to rotate.

[0009] In some embodiments of the present invention, the second driving member is disposed on the inner peripheral wall of the mounting hole, and one of the first driving member and the second driving member is a coil and the other is a magnet.

[0010] In some embodiments of the present invention, the first driving member and the second driving member are meshing gears. The first driving member is sleeved outside the lens. The driving assembly further includes: a driving motor disposed in the mounting hole, and an output shaft of the driving motor is in transmission connection with the second driving member.

[0011] In some embodiments of the present invention, the driving assembly further includes: a base disposed around the lens and connected to the lens, and the first driving member is disposed on the outer peripheral wall of the base.

[0012] In some embodiments of the present invention, a dynamic sealing structure is provided between the outer peripheral wall of the base and the inner peripheral wall of the mounting hole.

[0013] In some embodiments of the present invention, a plurality of first annular protrusions spaced apart along the axis direction of the lens barrel are provided on the outer peripheral wall of the base, and a plurality of second annular protrusions are provided on the inner peripheral wall of the mounting hole. The plurality of first annular protrusions and the plurality of second annular protrusions are arranged in a dislocation manner along the axis of the lens barrel. The surfaces of the first annular protrusions and the second annular protrusions are spaced apart, and the plurality of first annular protrusions and the plurality of second annular protrusions form the dynamic sealing structure; and / or, the dynamic sealing structure is a dynamic sealing ring.

[0014] In some embodiments of the present invention, a bearing is provided between the base and the hole wall of the mounting hole.

[0015] In some embodiments of the present invention, the water spraying member is disposed on the end face of the first end of the lens barrel.

[0016] In some embodiments of the present invention, a plurality of the water spraying members are arranged in a circumferential direction of the mounting hole; and / or, in a direction radially inward of the mounting hole, the nozzles of the water spraying members are inclined from the first end to the second end.

[0017] In some embodiments of the present invention, the lens self-cleaning device further includes: a sensor disposed on the lens barrel for detecting the light transmittance of the lens and / or the environmental dust concentration.

[0018] A lens assembly according to an embodiment of the present invention includes: a lens barrel having a mounting hole; a lens disposed in the mounting hole and at the first end; the above-mentioned lens self-cleaning device, wherein the driving assembly is disposed in the mounting hole for driving the lens to rotate, the rotation axis of the lens is parallel to or coincides with the axis of the lens barrel, and the water spraying member is disposed on the lens barrel for spraying water onto the surface of the lens facing away from the second end.

[0019] The lens assembly according to the embodiment of the present invention, by providing the above-mentioned lens self-cleaning device, the driving assembly is disposed on the lens barrel for driving the lens to rotate, the rotation axis of the lens is parallel to or coincides with the axis of the lens barrel; the water spraying member is disposed on the lens barrel for spraying water onto the surface of the lens facing away from the second end, combines the wetting of dust by liquid and the centrifugal force to throw off the mixture of liquid and dust, avoids the secondary dust raising in dry cleaning, realizes the non-contact cleaning of the lens throughout the process while ensuring the cleaning efficiency, reduces the wear of the lens caused by mechanical wiping, and improves the service life of the lens.

[0020] In some embodiments of the present invention, a drainage channel is provided in the lens barrel, the inlet of the drainage channel is disposed on the hole wall of the mounting hole and on the side of the lens facing away from the second end, and the outlet of the drainage channel is disposed on the outer surface of the lens barrel for discharging the water on the surface of the lens facing away from the second end.

[0021] In some embodiments of the present invention, the drainage channel is formed as a groove on the first end face of the lens barrel; and / or, the drainage channel is formed as a communication hole disposed inside the lens barrel; and / or, a one-way valve is provided in the drainage channel for blocking the flow of water from the outlet of the drainage channel to the inlet of the drainage channel.

[0022] In some embodiments of the present invention, in the direction radially outward of the mounting hole, the drainage channel is inclined toward the rotation direction of the lens.

[0023] In some embodiments of the present invention, the projection of the drainage channel on the first end face of the lens barrel is arc-shaped, linear or polyline-shaped.

[0024] A coal quality rapid inspection device according to an embodiment of the present invention includes the above-mentioned lens assembly.

[0025] According to the coal quality rapid detection device of the embodiment of the present invention, by providing the above-mentioned lens assembly and the above-mentioned lens self-cleaning device, the driving assembly is arranged in the lens barrel and used to drive the lens to rotate. The rotation axis of the lens is parallel or coincident with the axis of the lens barrel; the water spraying member is arranged in the lens barrel and used to spray water on the surface of the lens facing away from the second end. By combining the wetting of dust by liquid and the centrifugal force to throw off the mixture of liquid and dust, the secondary dust generation of dry cleaning is avoided. While ensuring the cleaning efficiency, non-contact cleaning of the lens throughout the process is realized, the wear of the lens caused by mechanical wiping is reduced, and the service life of the lens is prolonged.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Brief Description of the Drawings

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a top view of the lens assembly according to the embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of the drainage channel of the lens self-cleaning device according to the embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of the lens assembly according to the embodiment of the present invention, in which the drainage channel is not shown;

[0031] Figure 4 is Figure 3 an enlarged view of part A in

[0032] Reference Signs:

[0033] 100, lens assembly;

[0034] 10, lens self-cleaning device;

[0035] 1, driving assembly; 11, first driving member; 12, second driving member; 13, base; 14, dynamic sealing structure; 141, first annular protrusion; 142, second annular protrusion; 15, bearing;

[0036] 2, water spraying member;

[0037] 20, lens barrel; 201, mounting hole; 202, first end; 203, second end; 204, drainage channel; 205, one-way valve;

[0038] 30, lens. Detailed Embodiments

[0039] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element 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 invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Next, reference is made to Figures 1 - 4 describe a lens self-cleaning device 10 according to an embodiment of the present invention.

[0043] As Figures 1 - 4 shown, a lens self-cleaning device 10 according to an embodiment of the present invention is for a lens assembly 100 and includes: a driving assembly 1 and a water spraying member 2.

[0044] Specifically, referring to Figure 1 and Figure 3, the lens assembly 100 includes a lens barrel 20 and a lens 30. The lens barrel 20 has a mounting hole 201. The two ends of the lens barrel 20 in the axial direction are a first end 202 and a second end 203 respectively. The lens 30 is disposed in the mounting hole 201 and at the first end 202. The lens self-cleaning device 10 includes: a driving assembly 1 disposed on the lens barrel 20 for driving the lens 30 to rotate, and the rotation axis of the lens 30 is parallel or coincident with the axis of the lens barrel 20; a water spraying member 2 disposed on the lens barrel 20 for spraying water onto the surface of the lens 30 facing away from the second end 203. Of course, the water spraying member 2 can also spray a cleaning agent for washing grease and the like on the surface of the lens 30 facing away from the second end 203. Among them, it should be noted that the nozzle of the water spraying member 2 has a control valve, which can be used to control the opening and closing degree of the nozzle, so as to control the water spraying speed and flow rate.

[0045] It can be understood that the surface of the lens 30 facing away from the second end 203 is in contact with the external environment and is prone to dust accumulation. While the side of the lens 30 facing the second end 203 is the internal closed space of the lens barrel 20, and the probability of dust accumulation is low. Therefore, the lens self-cleaning device 10 is used to clean the surface of the lens 30 facing away from the second end 203. Among them, the water spraying member 2 is used to spray water onto the surface of the lens 30 facing away from the second end 203 to moisten the dust, so that the dust and water can be mixed together, reducing the secondary dust generation during dry cleaning and improving the cleaning efficiency. By driving the lens 30 to rotate through the driving assembly 1, a centrifugal force is generated to throw the moistened dust and water mixture away from the surface of the lens 30, reducing the residue. Thus, by combining liquid wetting and centrifugal force throwing, while ensuring the cleaning efficiency, a non-contact cleaning of the lens 30 throughout the process is achieved, reducing the wear of the lens 30 caused by mechanical wiping and improving the service life of the lens 30.

[0046] Furthermore, a hydrophobic layer is provided on the surface of the lens 30 facing away from the second end 203, so as to facilitate better drainage of water, avoid the residue of water after cleaning, and improve the cleaning efficiency and effect.

[0047] In addition, since the lens self-cleaning device 10 of the present invention is disposed on the lens assembly 100, the lens 30 can be cleaned at any time and place, improving the convenience of cleaning.

[0048] According to the lens self-cleaning device 10 of the embodiment of the present invention, the driving assembly 1 is disposed on the lens barrel 20 for driving the lens 30 to rotate, and the rotation axis of the lens 30 is parallel or coincident with the axis of the lens barrel 20; the water spraying member 2 is disposed on the lens barrel 20 for spraying water onto the surface of the lens 30 facing away from the second end 203. By combining liquid wetting of dust and centrifugal force throwing of the liquid and dust mixture, the secondary dust generation during dry cleaning is avoided. While ensuring the cleaning efficiency, a non-contact cleaning of the lens 30 throughout the process is achieved, reducing the wear of the lens 30 caused by mechanical wiping and improving the service life of the lens 30.

[0049] In some embodiments of the present invention, as Figure 3 and Figure 4 shown, the driving assembly 1 includes: a first driving member 11 and a second driving member 12. The first driving member 11 is disposed in the mounting hole 201 and is connected to the lens 30. The second driving member 12 is disposed in the mounting hole 201 and is used to drive the first driving member 11 to rotate.

[0050] It can be understood that the second driving member 12 drives the first driving member 11 to rotate, and the first driving member 11 is connected to the lens 30, thereby driving the lens 30 to rotate. The rotation axis of the first driving member 11 coincides with the rotation axis of the lens 30, thus realizing the rotation of the lens 30.

[0051] In some embodiments of the present invention, as Figure 3 and Figure 4 shown, the second driving member 12 is disposed on the inner peripheral wall of the mounting hole 201. One of the first driving member 11 and the second driving member 12 is a coil, and the other is a magnet. For example, in the present invention, the first driving member 11 is a magnet and the second driving member 12 is a coil. However, the present invention is not limited thereto, and it may also be that the first driving member 11 is a coil and the second driving member 12 is a magnet.

[0052] In the present invention, the first driving member 11 is a magnet and the second driving member 12 is a coil. The lens barrel 20 has structures such as a circuit board and circuits (not shown) for energizing the coil, and by controlling the magnitude and direction of the current in the coil, the rotation speed and rotation direction of the first driving member 11 can be controlled.

[0053] It can be understood that through the above setting method, electromagnetic drive is achieved between the first driving member 11 and the second driving member 12. Compared with the contact mechanical transmission, the electromagnetic drive has small friction, the lens 30 rotates more smoothly, and the noise is small.

[0054] In some embodiments of the present invention, the first driving member 11 and the second driving member 12 are meshing gears (not shown). The first driving member 11 is sleeved outside the lens 30. The driving assembly 1 further includes: a driving motor. The driving motor is disposed in the mounting hole 201, and the output shaft of the driving motor is in transmission connection with the second driving member 12. Thus, mechanical transmission is achieved between the first driving member 11 and the second driving member 12, the structure is reliable, the cost is low, and torque amplification can be achieved to drive a larger load.

[0055] In some embodiments of the present invention, as Figure 3 and Figure 4 shown, the driving assembly 1 further includes: a base 13. The base 13 surrounds the lens 30 and is connected to the lens 30. The first driving member 11 is disposed on the outer peripheral wall of the base 13.

[0056] Among them, an annular groove is provided on the inner peripheral wall of the base 13, and a part of the lens 30 is disposed in the annular groove, thereby realizing the connection between the lens 30 and the base 13. The first driving member 11 and the lens 30 are indirectly connected through the base 13. The setting of the base 13 can fix the first driving member 11 and the lens 30, avoiding the problem of difficult connection design caused by directly connecting the first driving member 11 and the lens 30.

[0057] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, a dynamic sealing structure 14 is provided between the outer peripheral wall of the base 13 and the inner peripheral wall of the mounting hole 201. Among them, the dynamic sealing structure 14 is disposed on a side of the lens 30 away from the second end 203. Thus, on the one hand, it can prevent water on the lens 30 from flowing into the side of the lens 30 facing the second end 203 along the gap between the base 13 and the mounting hole 201, improving the sealing performance. On the other hand, it enables the base 13 to rotate freely in the mounting hole 201, thereby realizing the rotation of the lens 30 and achieving centrifugal dust removal of the lens 30.

[0058] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, a plurality of first annular protrusions 141 spaced apart along the axial direction of the lens barrel 20 are provided on the outer peripheral wall of the base 13, and a plurality of second annular protrusions 142 are provided on the inner peripheral wall of the mounting hole 201. The plurality of first annular protrusions 141 and the plurality of second annular protrusions 142 are arranged in a staggered manner along the axis of the lens barrel 20, and the surfaces of the first annular protrusions 141 and the second annular protrusions 142 are spaced apart. The plurality of first annular protrusions 141 and the plurality of second annular protrusions 142 form a dynamic sealing structure 14.

[0059] It can be understood that the plurality of first annular protrusions 141 and the plurality of second annular protrusions 142 are staggered with each other and the surfaces are spaced apart. For example, in the axial direction of the lens barrel 20, there is a second annular protrusion 142 between any two adjacent first annular protrusions 141, so as to realize the staggered arrangement of the plurality of first annular protrusions 141 and the plurality of second annular protrusions 142 along the axis of the lens barrel 20. Thus, a labyrinth sealing structure is formed between the plurality of first annular protrusions 141 and the plurality of second annular protrusions 142, preventing the entry of water and dust and improving the sealing performance.

[0060] On the other hand, the surfaces of the first annular protrusions 141 and the second annular protrusions 142 are spaced apart, so as to prevent the base 13 from contacting the hole wall of the mounting hole 201 when rotating, realizing that the base 13 can rotate freely in the mounting hole 201.

[0061] In some embodiments of the present invention, the dynamic sealing structure 14 is a dynamic sealing ring (not shown). The dynamic sealing ring has a simple structure, less modification to the base 13 and the lens barrel 20, and low cost.

[0062] In some embodiments of the present invention, as Figure 3 shown, a bearing 15 is provided between the base 13 and the wall of the mounting hole 201. Thus, the rotation of the base 13 is made more stable and reliable, and accordingly, the rotation of the lens 30 is made more stable and reliable.

[0063] In some embodiments of the present invention, as Figure 1 shown, the water spraying member 2 is provided on the end face of the first end 202 of the lens barrel 20. Thus, it is convenient to disassemble and repair the water spraying member 2.

[0064] In some embodiments of the present invention, as Figure 1 shown, a plurality of water spraying members 2 are arranged in the circumferential direction of the mounting hole 201. Thus, the water spraying efficiency is improved, and accordingly, the cleaning efficiency of the lens 30 is improved. For example, in the Figure 1 example shown, there are 4 water spraying members 2, but the present invention is not limited thereto, and the number of water spraying members 2 can also be other numbers, such as 2, 3, 5, or 6, etc.

[0065] In some embodiments of the present invention, in the direction radially inward along the mounting hole 201, the nozzles of the water spraying member 2 are inclined from the first end 202 to the second end 203. Thus, the water sprayed by the water spraying member 2 can better spray onto the surface of the lens 30 facing away from the second end 203, avoiding waste of water.

[0066] In some embodiments of the present invention, the lens self-cleaning device 10 further includes: a sensor (not shown), the sensor is provided on the lens barrel 20 and is used to detect the light transmittance of the lens 30 and / or the environmental dust concentration. It should be noted that the sensor can be an optical pollution and / or environmental dust concentration sensor.

[0067] It can be understood that the lens self-cleaning device 10 further includes: a controller, the controller can be an STM32 (STMicroelectronics, microcontroller), the controller is communicatively connected to the sensor, the water spraying member 2 (the control valve on the water spraying member 2), and the driving assembly 1, and the controller can control the spraying speed and flow rate of the water spraying member 2, and control the rotation speed of the driving assembly 1 to drive the lens 30. When the sensor detects that the indicators of the light transmittance of the lens 30 and / or the environmental dust concentration are higher than the preset values, the controller controls the water spraying member 2 to spray water, and at the same time controls the driving assembly 1 to drive the lens 30 to rotate, so as to clean the lens 30.

[0068] Thus, through the combined action of the sensor and the controller, the self-cleaning function of the lens 30 can be realized, reducing the investment in manual detection.

[0069] Next, reference is made to Figures 1 - 4 describe the lens assembly 100 according to an embodiment of the present invention.

[0070] As shown Figures 1 - 4 in the figure, the lens assembly 100 according to an embodiment of the present invention includes: a lens barrel 20, a lens 30, and the above-mentioned lens self-cleaning device 10.

[0071] Specifically, referring to Figures 1 - 4 , the lens barrel 20 has a mounting hole 201; the lens 30 is disposed in the mounting hole 201 and at the first end 202; the driving assembly 1 is disposed in the mounting hole 201 for driving the lens 30 to rotate, and the rotation axis of the lens 30 is parallel or coincident with the axis of the lens barrel 20; the water spraying member 2 is disposed on the lens barrel 20 for spraying water onto the surface of the lens 30 facing away from the second end 203.

[0072] It can be understood that the surface of the lens 30 facing away from the second end 203 contacts the external environment and is prone to dust accumulation, while the side of the lens 30 facing the second end 203 is the internal closed space of the lens barrel 20, with a low probability of dust accumulation. Therefore, the lens self-cleaning device 10 is used to clean the surface of the lens 30 facing away from the second end 203. Among them, the water spraying member 2 is used to spray water onto the surface of the lens 30 facing away from the second end 203 to wet the dust, so that the dust and water can be mixed together, reducing the secondary dust generation during dry cleaning and improving the cleaning efficiency. By driving the lens 30 to rotate through the driving assembly 1, centrifugal force is generated to throw the wetted dust and water mixture away from the surface of the lens 30, reducing the residue. Thus, by combining liquid wetting and centrifugal force throwing, while ensuring the cleaning efficiency, non-contact cleaning of the lens 30 throughout the process is achieved, reducing the wear of the lens 30 caused by mechanical wiping and increasing the service life of the lens 30.

[0073] For the lens assembly 100 according to an embodiment of the present invention, by providing the above-mentioned lens self-cleaning device 10, the driving assembly 1 is disposed in the lens barrel 20 for driving the lens 30 to rotate, and the rotation axis of the lens 30 is parallel or coincident with the axis of the lens barrel 20; the water spraying member 2 is disposed on the lens barrel 20 for spraying water onto the surface of the lens 30 facing away from the second end 203, combining liquid wetting of dust and centrifugal force throwing of the liquid and dust mixture, avoiding secondary dust generation during dry cleaning, achieving non-contact cleaning of the lens 30 throughout the process while ensuring the cleaning efficiency, reducing the wear of the lens 30 caused by mechanical wiping, and increasing the service life of the lens 30.

[0074] In some embodiments of the present invention, as shown Figure 1 and Figure 2 in the figure, the lens barrel 20 has a drainage channel 204, the inlet of the drainage channel 204 is disposed on the hole wall of the mounting hole 201 and on the side of the lens 30 facing away from the second end 203, and the outlet of the drainage channel 204 is disposed on the outer surface of the lens barrel 20 for discharging the water on the surface of the lens 30 facing away from the second end 203.

[0075] It can be understood that, thereby, the sewage after cleaning can be discharged directionally along the drainage channel 204, avoiding the sewage from splashing onto the outer surface of the lens barrel 20 and keeping the outer surface of the lens barrel 20 clean.

[0076] Furthermore, the outlet of the drainage channel 204 can be connected to a water pipe, and one end of the water pipe is connected to a sewage tank, so that the sewage can be collected and the pollution of the external environment by the sewage can be avoided.

[0077] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the drainage channel 204 is formed as a groove on the end face of the first end 202 of the lens barrel 20. Thus, the processing can be directly carried out on the end face of the first end 202 of the lens barrel 20, making the formation of the drainage channel 204 simpler and reducing the processing difficulty.

[0078] In some embodiments of the present invention, the drainage channel 204 is formed as a communication hole, and the communication hole is arranged inside the lens barrel 20 (not shown). Thus, the drainage channel 204 is more closed, reducing the splashing of liquid on the outer surface of the lens barrel 20.

[0079] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, a one-way valve 205 is provided in the drainage channel 204 to block the flow of water from the outlet of the drainage channel 204 to the inlet of the drainage channel 204. Thus, the backflow of sewage to the lens 30 can be avoided, thereby further polluting the lens 30 and further ensuring the cleaning effect.

[0080] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, in the direction radially outward of the mounting hole 201, the drainage channel 204 is inclined toward the rotation direction of the lens 30. Thus, the design of the drainage channel 204 can conform to the rotation direction of the lens 30, increasing the flow rate of the sewage and facilitating the better discharge of the sewage.

[0081] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the projection of the drainage channel 204 on the end face of the first end 202 of the lens barrel 20 is arc-shaped, straight-line-shaped or polyline-shaped. For example, in the present invention, the projection of the drainage channel 204 on the end face of the first end 202 of the lens barrel 20 is arc-shaped, so as to reduce the resistance of liquid flow and enable the liquid to be discharged better. However, the present invention is not limited thereto, and the projection shape of the drainage channel 204 on the end face of the first end 202 of the lens barrel 20 can be adaptively changed according to the actual situation, such as straight-line-shaped or polyline-shaped, etc.

[0082] The following describes a coal quality rapid detection device according to an embodiment of the present invention.

[0083] The coal quality rapid detection device according to an embodiment of the present invention includes the above-mentioned lens assembly 100.

[0084] It can be understood that the coal quality rapid detection device detects the coal quality through methods such as spectral analysis, and the lens assembly 100 has a light source. Thus, the lens assembly 100 can play roles such as protecting the light source and maintaining the light cup.

[0085] The coal quality rapid detection device according to an embodiment of the present invention, by arranging the above-mentioned lens assembly 100 and the above-mentioned lens self-cleaning device 10, the driving assembly 1 is arranged on the lens barrel 20 and is used to drive the lens 30 to rotate. The rotation axis of the lens 30 is parallel or coincident with the axis of the lens barrel 20; the water spraying member 2 is arranged on the lens barrel 20 and is used to spray water on the surface of the lens 30 facing away from the second end 203. By combining the wetting of dust by the liquid and the centrifugal force to throw off the mixture of the liquid and dust, the secondary dust generation of dry cleaning is avoided. While ensuring the cleaning efficiency, non-contact cleaning of the lens 30 throughout the process is achieved, reducing the wear of the lens 30 caused by mechanical wiping and improving the service life of the lens 30.

[0086] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0087] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lens self-cleaning device, characterized in that, For a lens assembly, the lens assembly includes a lens barrel and a lens. The lens barrel has a mounting hole. The two ends of the lens barrel in the axial direction are a first end and a second end respectively. The lens is disposed in the mounting hole and at the first end. The lens self-cleaning device includes: A driving component, which is disposed in the lens barrel and is used to drive the lens to rotate. The rotation axis of the lens is parallel or coincident with the axis of the lens barrel; A water spraying member, which is disposed in the lens barrel and is used to spray water onto the surface of the lens facing away from the second end.

2. The lens self-cleaning device according to claim 1, wherein The driving component includes: A first driving member, which is disposed in the mounting hole and is connected to the lens; A second driving member, which is disposed in the mounting hole and is used to drive the first driving member to rotate.

3. The lens self-cleaning device according to claim 2, characterized in that, The second driving member is disposed on the inner peripheral wall of the mounting hole. One of the first driving member and the second driving member is a coil, and the other is a magnet.

4. The lens self-cleaning device according to claim 2, characterized in that, The first driving member and the second driving member are meshing gears. The first driving member is sleeved outside the lens. The driving component further includes: A driving motor, which is disposed in the mounting hole. The output shaft of the driving motor is in transmission connection with the second driving member.

5. The lens self-cleaning device according to claim 2, characterized in that, The driving component further includes: A base, which surrounds the lens and is connected to the lens. The first driving member is disposed on the outer peripheral wall of the base.

6. The lens self-cleaning device according to claim 5, characterized in that, There is a dynamic sealing structure between the outer peripheral wall of the base and the inner peripheral wall of the mounting hole.

7. The lens self-cleaning device according to claim 6, characterized in that, A plurality of first annular protrusions spaced apart in the axial direction of the lens barrel are provided on the outer peripheral wall of the base. A plurality of second annular protrusions are provided on the inner peripheral wall of the mounting hole. The plurality of first annular protrusions and the plurality of second annular protrusions are arranged in a staggered manner along the axis of the lens barrel. The surfaces of the first annular protrusions and the second annular protrusions are spaced apart. The plurality of first annular protrusions and the plurality of second annular protrusions form the dynamic sealing structure; And / or, the dynamic sealing structure is a dynamic sealing ring.

8. The lens self-cleaning device according to claim 5, characterized in that, A bearing is provided between the base and the hole wall of the mounting hole.

9. The lens self-cleaning device according to claim 1, characterized in that, The water spraying member is disposed on the end face of the first end of the lens barrel.

10. The lens self-cleaning device according to claim 8, wherein, The water spraying members are a plurality arranged circumferentially along the mounting hole; And / or, in the direction radially inward along the mounting hole, the nozzles of the water spraying members are inclined from the first end to the second end.

11. The lens self-cleaning device according to claim 1, characterized in that, It further includes: A sensor, which is disposed in the lens barrel and is used to detect the light transmittance of the lens and / or the environmental dust concentration.

12. A lens assembly, characterized in that, It includes: A lens barrel, which has a mounting hole; A lens, which is disposed in the mounting hole and at the first end; The lens self-cleaning device according to any one of claims 1-11, wherein the driving component is disposed in the mounting hole and is used to drive the lens to rotate. The rotation axis of the lens is parallel or coincident with the axis of the lens barrel. The water spraying member is disposed in the lens barrel and is used to spray water onto the surface of the lens facing away from the second end.

13. The lens assembly according to claim 12, characterized in that, The lens barrel has a drainage channel, an inlet of the drainage channel is provided on the pore wall of the mounting hole and on a side of the lens facing away from the second end, and an outlet of the drainage channel is provided on an outer surface of the lens barrel for discharging water on a surface of the lens facing away from the second end.

14. The lens assembly according to claim 13, wherein The drainage channel is formed as a groove on the first end face of the lens barrel; and / or, the drainage channel is formed as a communication hole provided in the lens barrel; and / or, a one-way valve is provided in the drainage channel for blocking the flow of water from the outlet of the drainage channel to the inlet of the drainage channel.

15. The lens assembly according to claim 13, wherein, In a direction radially outward of the mounting hole, the drainage channel is inclined toward a rotation direction of the lens.

16. The lens assembly according to claim 15, wherein A projection of the drainage channel on the first end face of the lens barrel is arc-shaped, linear or polyline-shaped.

17. A rapid coal quality inspection device, characterized in that Comprising: The lens assembly according to any one of claims 12-16.

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