Surface cleaning device

Abstract

The utility model relates to the technical field of laser radar sensor surface cleaning, in particular to a surface cleaning device. Comprising a nozzle seat, a sealing cover and a valve body, the sealing cover is detachably connected to the nozzle seat, the sealing cover and the nozzle seat are in clearance fit to form a spraying unit, a first channel is formed in the nozzle seat, and a second channel communicated with the first channel is formed in the nozzle seat. By arranging the nozzle seat, the sealing cover, the valve body, the spraying unit, the first channel and the second channel, various cleaning modes can be achieved, various cleaning requirements of the sensing surface of the sensor are met, and the sensing surface of the sensor can be cleaned more efficiently and conveniently; the device is arranged on the upper side of the laser radar sensor, the cleaning effect can be achieved, the laser radar sensor can be protected, and particularly when the device is used in a mining area, gravel falling from the inclined upper portion can be effectively prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of the surface cleaning of lidar sensors, in particular to a surface cleaning device. Background Technique

[0002] If dirt adheres to the sensor surface (also known as the sensor sensing surface) of a lidar sensor, it will seriously affect the normal function of the lidar sensor. For example, it will affect the emission process of the laser and the process of receiving the reflection, resulting in data distortion or loss. Especially when used outdoors or in harsh environments, substances such as water, fog, frost, mud, and insects may adhere to the surface, blocking the sensing area of the lidar sensor and causing it to malfunction. If this type of lidar sensor sensing is used in autonomous driving, it will cause safety accidents.

[0003] Currently, most lidar sensors on the market do not have a device for cleaning the sensor sensing surface, while a small number of lidar sensors are equipped with a nozzle device with a water spraying function on the sensor sensing surface. This nozzle device needs to spray a large amount of cleaning liquid on the sensor sensing surface during the cleaning process, which will cause the problem of continuously blocking the sensor sensing surface during the cleaning process, resulting in the lidar sensor being unable to work normally during the cleaning process. Moreover, after the cleaning is completed, there will be a lot of cleaning liquid remaining on the sensor sensing surface. These cleaning liquids will not only block the sensing area of the lidar sensor but also adsorb dust in the environment and cause secondary pollution. To solve the problem of cleaning liquid residue, the prior art improves the nozzle device and replaces the original nozzle device with a convex jet nozzle device with both water spraying and air jetting functions. Its working principle is: after spraying the cleaning liquid, air jetting treatment is carried out to remove the remaining cleaning liquid. However, the structure of this convex jet nozzle device is relatively complex, and in order to solve the problem of cleaning liquid residue, usually more nozzles need to be arranged. But when applied in mining areas, the convex jet nozzle device is easily scratched or knocked and damaged.

[0004] Therefore, the utility model provides a surface cleaning device. Content of the Utility Model

[0005] Based on this, it is necessary to provide a surface cleaning device for the above technical problems.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A surface cleaning device includes a nozzle seat, a cover, and a valve body. The cover is detachably connected to the nozzle seat, and there is a clearance fit between the cover and the nozzle seat to form a spraying unit. A spraying orifice is opened at the lower end of the spraying unit, and the spraying orifice is arranged facing the sensor sensing surface. A first channel for delivering pressurized gas and / or pressurized liquid to the spraying unit is provided in the nozzle seat. A second channel communicating with the first channel is provided in the nozzle seat. The valve body is detachably connected to the second channel, and the valve body is used to deliver pressurized liquid into the second channel.

[0008] Furthermore, a positioning unit for positioning and mounting on a lidar sensor is also provided on the nozzle seat. The positioning unit includes a first positioning surface, a second positioning surface, and two clamping arms. The first positioning surface is arranged at the front end of the nozzle seat, and the first positioning surface abuts against the sensor sensing surface. The second positioning surface is arranged at the lower end of the nozzle seat, and the second positioning surface abuts against the upper surface of the sensor sensing surface. The two clamping arms are symmetrically arranged on both sides of the nozzle seat, and the clamping arms are arranged at the corner ears of the lidar sensor. A groove for accommodating the corner ears is provided on the clamping arm, and a set screw hole is opened on the groove. Threaded holes are provided at the positions corresponding to the set screw holes on the corner ears.

[0009] Furthermore, the spraying unit is a flow splitting groove, and the flow splitting groove is arranged on the nozzle seat. A through hole is opened on the inner side wall of the flow splitting groove corresponding to the position of the first channel.

[0010] Furthermore, the flow splitting groove is an inverted U-shaped opening structure or an inverted V-shaped opening structure, and the spraying orifice is arranged at the opening end of the flow splitting groove.

[0011] Furthermore, a plurality of flow guiding blocks for adjusting the distribution of pressurized gas and / or pressurized liquid are provided in the flow splitting groove.

[0012] Furthermore, the flow guiding block is a spindle-shaped structure or a water droplet-shaped structure, and the flow guiding block abuts against the side wall of the cover.

[0013] Furthermore, the valve body includes a valve seat. A cylindrical end face is provided on one side of the valve seat. A third channel is provided in the valve seat. A fourth channel communicating with the third channel is provided on the cylindrical end face. The fourth channel communicates with the second channel. An elastic sleeve is sleeved on the cylindrical end face, and the elastic sleeve covers the fourth channel to prevent the backflow of pressurized liquid or pressurized gas.

[0014] Furthermore, a positioning post is provided on the side of the cover facing the nozzle seat. A positioning hole corresponding to the positioning post is provided on the nozzle seat, and an internal thread section is provided in the positioning post.

[0015] Furthermore, a sealing structure for sealing the flow splitting groove is provided between the cover and the nozzle seat.

[0016] Further, the sealing structure includes a sealing groove and a sealing body. The sealing groove is arranged on the nozzle seat, and the inner contour of the sealing groove fits the outer contour of the shunt groove. The sealing body is arranged in the sealing groove.

[0017] The advantages and beneficial effects of the present utility model are as follows: A surface cleaning device provided by the present utility model can achieve multiple cleaning modes through the arrangement of a nozzle seat, a cover, a valve body, a spraying unit, a first channel, and a second channel, and is applicable to various cleaning requirements of the sensor sensing surface, making the cleaning of the sensor sensing surface more efficient and convenient; by arranging the device above the lidar sensor, not only can the cleaning effect be achieved, but also the lidar sensor can be protected. Especially when used in mining areas, it can effectively prevent damage to the sensor caused by sand and gravel falling from the upper oblique direction. Description of the Drawings

[0018] Figure 1 It is an assembly drawing of the surface cleaning device and the lidar sensor in the embodiment of the present utility model.

[0019] Figure 2 It is a half-sectional view of the surface cleaning device in the embodiment of the present utility model.

[0020] Figure 3 It is a front sectional view of the surface cleaning device in the embodiment of the present utility model.

[0021] Figure 4 It is a top sectional view of the surface cleaning device in the embodiment of the present utility model.

[0022] Figure 5 It is a front view of the nozzle seat in the embodiment of the present utility model.

[0023] Figure 6 It is a structural schematic diagram of the cover in the embodiment of the present utility model.

[0024] Figure 7 It is a structural schematic diagram of the valve body in the embodiment of the present utility model.

[0025] Reference numerals: nozzle seat 1, cover 2, valve body 3, first channel 4, second channel 5, shunt groove 6, first positioning surface 7, second positioning surface 8, clamping arm 9, positioning hole 10, through hole 11, spraying port 12, sensor sensing surface 13, guiding block 14, valve seat 15, elastic kit 16, cylindrical end face 17, third channel 18, fourth channel 19, groove 20, third inner side wall surface 21, corner ear 22, set screw hole 23, positioning column 24, sealing groove 25. Detailed Embodiments

[0026] Embodiments of the present application 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 and are only used to explain the present application and should not be construed as a limitation of the present application. And without conflict, the following embodiments and the features in the embodiments may be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" 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 directly connected or indirectly connected 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 application can be understood according to specific situations.

[0028] Such as Figures 1-7As shown, a surface cleaning device comprises a nozzle seat 1, a sealing cover 2 and a valve body 3, wherein the sealing cover 2 is detachably connected to the nozzle seat 1, and the sealing cover 2 and the nozzle seat 1 are gap-matched to form a spray unit, a spray port 12 is provided at the lower end of the spray unit, and the spray port 12 is arranged toward a sensor sensing surface 13, a first channel 4 for conveying pressurized gas and / or pressurized liquid to the spray unit is provided in the nozzle seat 1, a second channel 5 connected to the first channel 4 is provided in the nozzle seat 1, and the valve body 3 is detachably connected to the second channel 5, and the valve body 3 is used to convey pressurized liquid to the second channel 5; it should be noted that the present application can use different cleaning modes according to different cleaning needs to clean different types of dirt, and the cleaning is more efficient and fast. For example, when cleaning water droplets on the sensor sensing surface 13, pressurized gas can be applied and the airflow of the pressurized gas can be used for cleaning. The sensor sensing surface 13 is cleaned, that is, in this mode, if the sensor sensing surface 13 is attached with liquid substances, it is only necessary to introduce pressurized gas for cleaning without consuming cleaning liquid, so as to reduce the consumption of cleaning liquid; for example, when cleaning the mud on the sensor sensing surface 13, pressurized liquid can be introduced first, and then pressurized gas can be introduced to form a water mist spray, and the water mist is used to flush the mud on the sensor sensing surface 13, and then pressurized gas is introduced multiple times, and the residual liquid on the sensor sensing surface 13 is cleaned by a single jet, so as to complete the cleaning operation of the sensor sensing surface 13. That is, in this mode, if the sensor sensing surface 13 is attached with solid dirt such as dust, mud, and insect corpses, the sensor sensing surface 13 can be cleaned with atomized cleaning liquid, and flushed with the airflow of pressurized gas. Compared with the existing nozzle device with a water spray function, the consumption of cleaning liquid can be effectively reduced.

[0029] In a possible implementation, Figures 1-3As shown in the figure, a positioning unit for positioning and installing on a lidar sensor is provided on the nozzle seat 1. The positioning unit includes a first positioning surface 7, a second positioning surface 8, and two clamping arms 9. The first positioning surface 7 is arranged at the front end of the nozzle seat 1 and abuts against the sensor sensing surface 13. The second positioning surface 8 is arranged at the lower end of the nozzle seat 1 and abuts against the upper surface of the sensor sensing surface 13. The two clamping arms 9 are symmetrically arranged on both sides of the nozzle seat 1, and the clamping arms 9 are arranged at the corner ears 22 of the lidar sensor. A groove 20 for accommodating the corner ears 22 is provided on the clamping arm 9. A set screw hole 23 is opened on the groove 20, and an internal thread hole is opened at the position corresponding to the set screw hole 23 on the corner ear 22. It should be noted that in this embodiment, the first positioning surface 7 fits with the sensor sensing surface 13, the second positioning surface 8 fits with the upper surface of the sensor sensing surface 13, and a groove 20 is provided on the clamping arm 9. The groove 20 includes a first inner side wall surface, a second inner side wall surface, and a third inner side wall surface 21 connected in sequence. After assembly, there is a gap between the third inner side wall surface 21 and the lower end surface of the corner ear 22, and a set screw hole 23 is provided on the third inner side wall surface 21. A screw is used to threadedly connect to the internal thread hole through the set screw hole 23 to achieve the positioning and fixing functions.

[0030] In a possible implementation manner, as Figure 2 and Figure 5 shown, the injection unit is a flow splitting groove 6. The flow splitting groove 6 is arranged on the nozzle seat 1. A through hole 11 is opened on the inner side wall of the flow splitting groove 6 corresponding to the position of the first channel 4. The flow splitting groove 6 is an inverted U-shaped opening structure or an inverted V-shaped opening structure. The injection port 12 is arranged at the opening end of the flow splitting groove 6. A plurality of flow guiding blocks 14 for adjusting the distribution of pressure gas and / or pressure liquid are arranged in the flow splitting groove 6. The flow guiding blocks 14 are in a shuttle shape or a water droplet shape, and the flow guiding blocks 14 abut against the side wall of the cover 2. It should be noted that in this embodiment, there is a clearance fit between the flow splitting groove 6 and the cover 2, and the opening at the lower end of the flow splitting groove 6 is the injection port 12. The injection port 12 is arranged facing the sensor sensing surface 13 for applying pressure gas and / or pressure liquid to the sensor sensing surface 13. At the same time, in order to divide the pressure gas and / or pressure liquid flowing into the flow splitting groove 6 into multiple parts and drain them to the injection port 12 so that the ejected pressure gas and / or pressure liquid are more uniform, a plurality of flow guiding blocks 14 are arranged in the flow splitting groove 6 of the present application. The distance between adjacent flow guiding blocks 14 and the size of the flow guiding blocks 14 can be flexibly arranged according to the actual situation and will not be limited here. The flow guiding blocks 14 are in a shuttle shape or a water droplet shape, and the flow guiding blocks 14 fit with the side wall of the cover 2. In addition, by adding a nozzle seat 1 above the lidar sensor, it has a high structural strength, can not only achieve the cleaning effect, but also play a protective role for the lidar sensor. Especially when used in a mining area, it can effectively prevent the lidar sensor from being damaged by sand and gravel falling from the upper oblique direction.

[0031] In a possible implementation, as Figure 4 and Figure 7 shown, the valve body 3 includes a valve seat 15. One side of the valve seat 15 is provided with a cylindrical end face 17. A third channel 18 is provided in the valve seat 15. A fourth channel 19 communicating with the third channel 18 is provided on the cylindrical end face 17. The fourth channel 19 communicates with the second channel 5. An elastic sleeve 16 is sleeved on the cylindrical end face 17. The elastic sleeve 16 covers the fourth channel 19 to prevent backflow of pressure liquid or pressure gas. It should be noted that in this embodiment, the elastic sleeve 16 can be selected as an elastic rubber sleeve, as long as it can prevent backflow of pressure liquid or pressure gas into the valve seat 15, and no further limitation will be made here. In addition, when the pressure liquid flows from the third channel 18 to the fourth channel 19, due to the pressure action of the pressure liquid, the elastic sleeve 16 sleeved on the fourth channel 19 can be pushed open, and then enter the second channel 5, and then be transported to the diversion groove 6 through the first channel 4. Finally, the pressure liquid is applied to the sensor sensing surface 13 through the diversion groove 6. In addition, by the elastic action of the elastic sleeve 16, it can be tightened on the cylindrical end face 17 of the valve seat 15 to play a check valve role. At the same time, an external thread section is provided on the valve seat 15, and a matching internal thread section is provided at the position of the second channel 5 corresponding to the external thread section for easy assembly.

[0032] In a possible implementation, as Figures 5-6 shown, one side of the cover 2 facing the nozzle seat 1 is provided with a positioning post 24. A positioning hole 10 is provided on the nozzle seat 1 corresponding to the positioning post 24. An internal thread section is provided in the positioning post 24. It should be noted that in this embodiment, the number of the positioning posts 24 is at least two. By using the cooperation of the positioning hole 10 and the positioning post 24 and using screws, it can play a role in positioning and installation.

[0033] In a possible implementation, as Figure 2 、 Figure 4 and Figure 5 shown, a sealing structure for sealing the diversion groove 6 is provided between the cover 2 and the nozzle seat 1. The sealing structure includes a sealing groove 25 and a sealing body. The sealing groove 25 is provided on the nozzle seat 1, and the inner contour of the sealing groove 25 is arranged to fit the outer contour of the diversion groove 6. The sealing body is provided in the sealing groove 25. It should be noted that in this embodiment, in addition to providing the sealing groove 25 on the nozzle seat 1, the sealing groove 25 can also be provided on the cover 2, or both on the nozzle seat 1 and the cover 2, and a sealing body is filled in the sealing groove 25 to achieve sealing of the diversion groove 6. The sealing body can be selected as a sealing strip or filled with sealing glue for sealing.

[0034] The working principle of the present utility model is as follows: First, place the sealing strip in the sealing groove 25 or fill the sealing groove 25 with sealant. Then, dock and install the positioning post 24 with the positioning hole 10, and then fixedly install the cover 2 on the nozzle base 1 using screws. Subsequently, thread-connect the valve body 3 to the second channel 5, and then integrally assemble this device with the lidar sensor using screws. Connect the valve body 3 to an external pressure liquid storage device, and connect the first channel 4 to an external pressure gas storage device. According to the cleaning requirements of the sensor sensing surface, different cleaning modes can be used. For example, when cleaning the water droplets on the sensor sensing surface 13, pressure gas can be applied, and the air flow of the pressure gas is used to clean the sensor sensing surface 13. Another example is that when cleaning the dirt on the sensor sensing surface 13, pressure liquid can be introduced first, and then pressure gas can be introduced to form a water mist and spray out. The water mist is used to wash away the dirt on the sensor sensing surface 13, and then pressure gas is introduced multiple times, and the residual liquid on the sensor sensing surface 13 is cleaned by the way of single jet, so as to complete the cleaning operation of the sensor sensing surface 13. Multiple cleaning modes can be realized, which are applicable to various cleaning requirements of the sensor sensing surface, making the cleaning of the sensor sensing surface more efficient and convenient.

[0035] The above content is a further detailed description of the present utility model in combination with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or replacements can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A surface cleaning device, characterized in that, It includes a nozzle seat, a cover, and a valve body. The cover is detachably connected to the nozzle seat, and there is a clearance fit between the cover and the nozzle seat to form a spraying unit. A spraying orifice is provided at the lower end of the spraying unit, and the spraying orifice is arranged facing the sensor sensing surface. A first channel for delivering pressurized gas and / or pressurized liquid to the spraying unit is provided in the nozzle seat. A second channel communicating with the first channel is provided in the nozzle seat. The valve body is detachably connected to the second channel, and the valve body is used for delivering pressurized liquid into the second channel.

2. The surface cleaning device according to claim 1, wherein, A positioning unit for positioning and mounting on a lidar sensor is further provided on the nozzle seat. The positioning unit includes a first positioning surface, a second positioning surface, and two clamping arms. The first positioning surface is arranged at the front end of the nozzle seat, and the first positioning surface abuts against the sensor sensing surface. The second positioning surface is arranged at the lower end of the nozzle seat, and the second positioning surface abuts against the upper surface of the sensor sensing surface. The two clamping arms are symmetrically arranged on both sides of the nozzle seat, and the clamping arms are arranged at the corner ears of the lidar sensor. A groove for accommodating the corner ears is provided on the clamping arm, and a set screw hole is provided in the groove. Threaded holes are provided at positions corresponding to the set screw holes on the corner ears.

3. The surface cleaning device according to claim 1, wherein, The spraying unit is a flow splitting groove, and the flow splitting groove is arranged on the nozzle seat. A through hole is provided in the inner side wall of the flow splitting groove corresponding to the position of the first channel.

4. The surface cleaning device according to claim 3, characterized in that, The flow splitting groove is of an inverted U-shaped opening structure or an inverted V-shaped opening structure, and the spraying orifice is arranged at the opening end of the flow splitting groove.

5. The surface cleaning device according to claim 3, wherein, A plurality of flow guiding blocks for adjusting the distribution of pressurized gas and / or pressurized liquid are provided in the flow splitting groove.

6. The surface cleaning device according to claim 5, characterized in that, The flow guiding blocks are of a spindle-shaped structure or a water droplet-shaped structure, and the flow guiding blocks abut against the side wall of the cover.

7. The surface cleaning device according to claim 1, characterized in that The valve body includes a valve seat. A cylindrical end face is provided on one side of the valve seat. A third channel is provided in the valve seat. A fourth channel communicating with the third channel is provided on the cylindrical end face. The fourth channel communicates with the second channel. An elastic sleeve is sleeved on the cylindrical end face, and the elastic sleeve covers the fourth channel to prevent the backflow of pressurized liquid or pressurized gas.

8. The surface cleaning device according to claim 1, characterized in that, A positioning post is provided on the side of the cover facing the nozzle seat. A positioning hole corresponding to the positioning post is provided on the nozzle seat. An internal threaded section is provided in the positioning post.

9. The surface cleaning device according to claim 3, wherein, A sealing structure for sealing the flow splitting groove is provided between the cover and the nozzle seat.

10. A surface cleaning device according to claim 9, characterized in that, The sealing structure includes a sealing groove and a sealing body. The sealing groove is arranged on the nozzle seat, and the inner contour of the sealing groove fits the outer contour of the flow splitting groove. The sealing body is arranged in the sealing groove.

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