Cleaning device for water level indicators

Abstract

The present invention relates to the field of cleaning devices for water level indicators and in particular to a cleaning device for water level indicators comprising a sealing strip component, a vacuum component, a movable component, a housing and several magnetic components, wherein the housing has a first end face, the housing is connected to the magnetic components, the magnetic components are arranged on the first end face and the several magnetic components are spaced apart from one another in the circumferential direction of the first end face; wherein the sealing strip component is arranged on the first end face and the sealing strip component and the first end face enclose a vacuum chamber;wherein the vacuum component and the movable component are each connected to the housing, the movable component and the vacuum component are arranged in the vacuum chamber, and the pressure output by the vacuum component is divided into a first pressure and a second pressure, wherein at the first pressure the housing is attached to the water level indicator and at the second pressure the movable component moves to cause the housing to move relative to the water level indicator, wherein the first pressure is less than the second pressure. The cleaning device for water level indicators of the present invention can clean various types of water level indicators.

Description

Technical area

[0001] The present invention relates to the field of cleaning devices for water level indicators and, in particular, to a cleaning device for water level indicators. Background technology

[0002] In daily use, the water level indicator in water conservancy projects is easily adhered to mud, moss, etc., which affects reading and use. Because the water level indicator is set in the river channel, it is not convenient to perform manual cleaning. In related technology, a water level indicator cleaning device is provided. The fixed frame is arranged vertically, located on one side of the water level indicator. A moving mechanism is movably installed on the fixed frame. The moving mechanism can move up and down along the vertical direction. The bottom of the moving mechanism is rotatably installed with a brush roller. The brush roller is driven by the up and down movement of the moving mechanism to clean the surface of the water level indicator.

[0003] However, in related technologies, the cleaning device is installed on the water level indicator, and the cleaning device is matched with the shape of the water level indicator and can only be applied to the fixed type of water level indicator. Contents of the invention

[0004] The present invention aims to at least partially solve one of the technical problems in the prior art. To this end, embodiments of the present invention provide a water level indicator cleaning device capable of cleaning various types of water level indicators.

[0005] The water level indicator cleaning device according to the embodiments of the present invention comprises: a housing and a plurality of magnetic components, wherein the housing has a first end surface, the housing is connected to the magnetic components, the magnetic components are arranged on the first end surface, and the plurality of magnetic components are arranged spaced from each other in the circumferential direction of the first end surface; a sealing strip component, the sealing strip component being disposed on the first end face, the sealing strip component and the first end face enclosing a suction pressure chamber; a vacuum component and a movable component, wherein the vacuum component and the movable component are each connected to the housing, the movable component and the vacuum component are arranged in the suction pressure chamber, and the pressure output from the vacuum component is divided into a first pressure and a second pressure, wherein at the first pressure the housing is attached to the water level indicator and at the second pressure the movable component moves to drive the housing to move relative to the water level indicator, the first pressure being smaller than the second pressure.

[0006] The water level indicator cleaning device according to the embodiments of the present invention is capable of cleaning various types of water level indicators.

[0007] In some embodiments, the movable component comprises a first movable track element and a second movable track element, wherein the first movable track element and the second movable track element are arranged spaced apart from one another in the longitudinal direction of the housing.

[0008] In some embodiments, the vacuum component comprises a vacuum pump and an exhaust air opening, wherein the vacuum pump inlet is arranged in the suction pressure chamber, the vacuum pump is connected to the housing, the vacuum pump outlet is connected to an exhaust air pipe, and the outlet of the exhaust air pipe is arranged on the outer wall of the housing facing away from the first end face.

[0009] In some embodiments, the dimension of the sealing strip component in the thickness direction of the housing is larger than the dimension of the movable component in the thickness direction of the housing.

[0010] In some embodiments, the material of the sealing strip component is polyurethane rubber.

[0011] In some embodiments, structural adhesive is applied between the sealing strip component and the first end face.

[0012] In some embodiments, the water level indicator cleaning device further comprises a cleaning brush component, wherein the cleaning brush component is connected to the housing, and the cleaning brush component is provided at either end of the housing in the height direction.

[0013] In some embodiments, the cleaning brush component further comprises a first pump and a spray gun, and a fluid storage chamber is provided in the housing, wherein the input end of the first pump is connected to the fluid storage chamber, the output end of the first pump is removably connected to the inlet of the spray gun, and the outlet of the spray gun faces the cleaning brush component.

[0014] In some embodiments, the water level indicator cleaning device further comprises a handle, wherein the handle is connected to the outer wall of the housing.

[0015] In some embodiments, the above-mentioned cleaning device for water level indicators further comprises a camera, wherein the camera is connected to the housing and the camera is arranged on the outer wall of the housing facing away from the first end face. Figures Fig. 1 is a schematic diagram of a water level indicator cleaning device according to the embodiment of the present invention. Fig. 2 is a rear view of the water level indicator cleaning device according to the embodiment of the present invention. Fig. 3 is a front view of the water level indicator cleaning device according to the embodiment of the present invention. Reference symbols in the figures:

[0016] Water indicator 1, vacuum component 2, movable component 3, first movable track element 31, second movable track element 32, sealing strip component 4, housing 5, first end face 51, magnetic component 6, cleaning brush component 7, spray gun 71, handle 8, camera 9, power supply line 10, handle 11. Specific embodiments

[0017] In the following, exemplary embodiments of the present invention are described in detail, examples of which are illustrated in the accompanying figures. The exemplary embodiments described below with reference to the accompanying figures are exemplary and are intended to illustrate the present invention, but are not to be understood as limiting the present invention.

[0018] The cleaning device for water level indicators 1 according to the embodiments of the present invention comprises a vacuum component 2, a movable component 3, a sealing strip component 4, a housing 5, and a plurality of magnetic components 6. The housing 5 has a first end face 51. The housing 5 is connected to the magnetic components 6. The magnetic components 6 are arranged on the first end face 51, and the plurality of magnetic components 6 are arranged spaced apart from one another in the circumferential direction of the first end face 51. The sealing strip component 4 is arranged on the first end face 51, and the sealing strip component 4 and the first end face 51 enclose a suction pressure chamber. The vacuum component 2 and the movable component 3 are each connected to the housing 5. The movable component 3 and the vacuum component 2 are arranged in the suction pressure chamber.and the pressure output by the vacuum component 2 is divided into a first pressure and a second pressure, wherein at the first pressure the housing 5 is attached to the water level indicator and at the second pressure the movable component 3 moves to drive the housing 5 to move relative to the water level indicator 1, wherein the first pressure is smaller than the second pressure.

[0019] In particular, as in the Fig. 1 to 3, the height direction of the housing 5 is the up and down direction, the thickness direction of the housing 5 is the front and back direction, and the width direction of the housing 5 is the left and right direction.

[0020] A plurality of magnetic components 6 may be arranged in the circumferential direction of the first end face 51 near the water indicator 1 at a distance from each other, for example, the magnetic components 6 are arranged in the upper left, lower left, right, and lower corners of the first end face 51, and then the magnetic adsorption of the four corners of the housing 5 can be performed.

[0021] The shape of the sealing strip component 4 may be a ring, or the shape of the sealing strip component 4 may be an existing other shape, the sealing strip component 4 has a certain thickness of the size in the front and rear direction, the sealing strip component 4 and the sealing strips are arranged on the first end face 51, the sealing strip component 4 is arranged between a plurality of magnetic components 6, that is, the sealing strip component 4 is arranged between the four magnetic components 6, and the sealing strip component 4 is arranged in the center of the first end face 51, the sealing strip component 4 and the first end face 51 are extended by a vacuum tank, and when the cleaning device is attached to the water level indicator 1, the sealed space is enclosed between the sealing strip component 4, the first end face 51 and the water level indicator 1.

[0022] Negative pressure component 2 is attached to the first end face 51. Negative pressure component 2 is attached to the first end face 51 to adsorb the sealed space into a vacuum or negative pressure state. Through adsorption, the cleaning device is attached to the water level indicator 1. It is understood that the water level indicator 1 is not a theoretically smooth and flat surface, so the magnetic components 6 are arranged to further improve the stability of the adsorption by magnetic adsorption.

[0023] At the first pressure, the housing 5 is attached to the water level indicator 1. It is understood that at this time, the pressure difference between the pressure in the sealed space and the external atmospheric pressure is too large, the cleaning device is attached to the water level indicator 1. At this time, the magnetic components 6 are magnetically adsorbed to the water level indicator 1, whereby the cleaning device is further attached to the water level indicator 1 to prevent the cleaning device from falling or moving, and the cleaning device is attached to the water level indicator 1, and thus the water level indicator 1 is cleaned.

[0024] At the second pressure, since the second pressure is greater than the first pressure, the pressure difference between the pressure inside the sealed space and the outside atmospheric pressure decreases at this time, whereby the movable component 3 is activated, the movable component 3 contacts the surface of the water level indicator 1 and in turn drives the housing 5 to move in the up and down direction or in the left and right direction.

[0025] Furthermore, the vacuum component 2 includes a vacuum pump and a pressure sensor. The pressure sensor and the vacuum pump are connected to the housing 5. The pressure sensor is configured to monitor the pressure in the sealed space. Thus, the air pressure in the sealed space is monitored by the pressure sensor. It is understood that the first pressure may be a preset pressure range, and the second pressure may be a second preset pressure range. The pressure monitoring sensor is capable of monitoring whether the pressure in the sealed space is within the preset pressure range, which improves the stability and safety of using the cleaning device.

[0026] Furthermore, the magnetic component 6 includes an electromagnet element and a current regulating element, wherein the current regulating element is configured to output current to the electromagnet element, and the current regulating element can regulate the current magnitude to change the current magnitude of the electromagnet element, which in turn changes the magnetic force generated by the electromagnet element, which in turn changes the magnetic adsorption force between the magnetic component 6 and the water level indicator 1.

[0027] Since some types of water level indicators 1 are provided with a scaled slit, the use of adsorption makes the cleaning device very easy to fall off from the top of the water level indicator 1, so the magnetic component 6 is added and the magnetic component 6 is provided around the cleaning device for magnetic adsorption to improve the stability and safety of the cleaning device.

[0028] In addition, a first current range and a second current range of the magnetic component 6 may be set such that the magnetic component 6 is in the first current range when the negative pressure component 2 is in the first pressure range, and that the magnetic component 6 is in the second pressure range when the magnetic component 6 is in the second pressure range, and that the first current range is smaller than the second current range in order to avoid the cleaning device from falling directly off the water level indicator 1 when moving due to the scaled slot, which leads to the failure of the adsorption pressure.

[0029] The cleaning device for the water level indicator 1 according to the embodiment of the present invention can clean the water level indicator 1 by providing the sealing strip component 4 and the negative pressure component 2 and exhausting the air to generate a negative pressure, and then attaching the cleaning device to the water level indicator 1, and by providing the movable component 3, the movable component 3 drives the water level indicator cleaning device 1 to move on the water level indicator 1, which eliminates the need for manual cleaning and improves the efficiency and stability of cleaning the water level indicator 1.

[0030] In some further embodiments, the sealing strip component 4 may be hemispherical, and the vacuum component 2 and the movable component 3 are arranged at the junction between the hemispherical sealing strip component 4 and the first end surface 51, so that when the vacuum component 2 sucks out the air, the hemispherical sealing strip component 4 is deformed at this time due to the absorption of the external atmospheric pressure, and at this time the movable component 3 comes into contact with the water level indicator 1, which facilitates the movement or fixation to the water level indicator 1.

[0031] In some further embodiments, the movable component 3 comprises a first movable track element 31 and a second movable track element 32, wherein the first movable track element 31 and the second movable track element 32 are arranged spaced apart from one another in the longitudinal direction of the housing 5.

[0032] In particular, as described in the Fig. 1 to 3, the first movable crawler member 31 and the second movable crawler member 32 are arranged oppositely and spaced from each other in the left and right direction, and each of the first crawler member and the second crawler member includes a drive motor, a drive wheel, a driven wheel, and a track, and the drive motor is connected to the drive wheel, and the track is located on an outer peripheral surface of the drive wheel and the driven wheel, and the drive motor drives the drive wheel to rotate, which then drives the crawler to rotate and the driven wheel to rotate.

[0033] The track is at least partially in contact with the water level indicator 1, and the rotational speeds of the drive motors of the first track element and the second track element, which are arranged opposite each other in the left and right directions, may be the same or different, which in turn moves the cleaning device up and down or left and right, which in turn enables the cleaning of the entire water level indicator 1.

[0034] In the cleaning device of the water level indicator 1 according to the embodiment of the present invention, by disposing the first crawler member and the second crawler member, the rotation speeds of the drive motors of the first crawler member and the second crawler member arranged opposite to each other in the left and right direction can be the same or different, whereby the cleaning device can be moved up and down or left and right, which enables the cleaning of the entire water level indicator 1, facilitates the movement and fixation of the water level indicators 1 of different types, and improves the efficiency and stability of cleaning the water level indicator 1.

[0035] In some embodiments, the vacuum component 2 comprises a vacuum pump and an exhaust pipe, wherein the vacuum pump inlet is arranged in the suction pressure chamber, the vacuum pump is connected to the housing 5, the vacuum pump outlet is connected to the exhaust pipe, and the exhaust pipe outlet is arranged on the outer wall surface of the housing 5 far away from the first end face 51.

[0036] As in the Fig. As shown in Figures 1 to 3, the vacuum component 2 includes a vacuum pump and an exhaust port, and the outlet end of the vacuum pump is provided in the suction pressure chamber. The vacuum pump extracts air from the suction pressure chamber to convert the air pressure in the suction pressure chamber into a vacuum or negative pressure, which in turn attaches the entire device to the water level indicator 1 or always causes the atmospheric pressure to exert pressure on the cleaning device toward the water level indicator 1, thus facilitating the movement or attachment of the cleaning device. The exhaust pipe is adapted to discharge the extracted air, which in turn increases the stability and safety when using the vacuum component 2.

[0037] In some embodiments, the dimension of the sealing strip component 4 in the direction of the thickness of the housing 5 is larger than the dimension of the movable component 3 in the direction of the thickness of the housing 5.

[0038] The dimension of the sealing strip component 4 in the front and rear direction is larger than the dimension of the movable component 3 in the front and rear direction, that is, the rear end surface of the sealing strip component 4 first contacts the outer peripheral surface of the water level indicator 1, and then the negative pressure component 2 acts to suck out the air, which in turn puts the sealed space into a negative pressure state, the sealing strip component 4 is subjected to elastic deformation by the atmospheric pressure in the front and rear direction, which in turn causes the first movable track element 31 and the second movable track element 32 to come into contact with the outer periphery of the water level indicator 1, thereby facilitating the movement of the cleaning components.

[0039] By moderately deforming the sealing strip component 4, it is possible to seal the sealing space and at the same time allow the movable component 3 to contact the surface of the water level indicator 1, which facilitates the attachment or movement of the cleaning device to the water level indicator 1.

[0040] The cleaning device of the water level indicator 1 according to the embodiment of the present invention can seal the sealing space while allowing the movable component 3 to contact the surface of the water level indicator 1 by setting the size of the sealing strip component 4 in the thickness direction of the housing 5 larger than the size of the movable component 3 in the thickness direction of the housing 5 and moderately deforming the sealing strip component 4, which facilitates the attachment or movement of the cleaning device on the water level indicator 1.

[0041] In some embodiments, the material of the sealing strip component 4 is polyurethane rubber.

[0042] As in the Fig. As shown in Figures 1 to 3, the polyurethane rubber material can improve the abrasion resistance of the sealing strip component 4. The polyurethane rubber material is inherently elastic and facilitates deformation under negative pressure, that is, it facilitates deformation under a first pressure or a second pressure, allowing the movable component to come into contact with the water level indicator 1 when it is in contact with the water level indicator 1 during movement. The abrasion resistance of the polyurethane rubber material improves the stability and safety of the sealing strip component 4.

[0043] In addition, structural adhesive is applied between the sealing strip component 4 and the first end face 51, which in turn fixes the sealing strip component 4 to the first end face 51, thereby improving the stability and safety of the sealing strip component 4 during use.

[0044] In some embodiments, a cleaning brush component 7 is also provided, wherein the cleaning brush component 7 is connected to the housing 5 and the cleaning brush component 7 is arranged at either end of the housing 5 in the height direction.

[0045] In particular, as in the Fig. 1 to 3, the cleaning brush component 7 is arranged at an upper or lower end of the housing 5, wherein the cleaning end of the cleaning brush component 7 is adapted to contact the water level indicator 1 in order to clean the water level indicator 1.

[0046] Furthermore, the cleaning brush component 7 comprises a cleaning brush and a drive element, wherein the drive element is connected to the housing 5, the cleaning brush is rotatably arranged at the upper or lower end of the housing 5, and the output end of the drive element is connected to the cleaning brush to drive the cleaning brush to rotate and thus clean the water level indicator 1. The cleaning brush is a prior art cleaning brush.

[0047] In some embodiments, the cleaning brush component 7 further comprises a first pump and a spray gun 71, and a liquid storage chamber is provided in the housing 5, wherein the input end of the first pump is connected to the liquid storage chamber, the output end of the first pump is removably connected to the inlet of the spray gun 71, and the outlet of the spray gun 71 faces the cleaning brush component 7.

[0048] As in the Fig. 1 to 3, the first pump is connected to the liquid storage chamber to pump cleaning liquid from the liquid storage chamber, while the first pump is connected to the first spray gun 71 and the first spray gun 71 sprays the cleaning liquid toward the cleaning brush component 7.

[0049] In addition, an external water source can be connected to the fluid storage chamber to supply the fluid storage chamber with cleaning fluid. This in turn improves the stability and usability of the water level indicator cleaning device 1.

[0050] In some embodiments, a handle 11 is also provided, wherein the handle 11 is connected to the outer wall of the housing 5.

[0051] In particular, as in the Fig. 1 to 3, the handle 11 is connected to the housing 5, which makes it easier for an operator to lift and carry the water level indicator cleaning device 1 and increases the user-friendliness of the water level indicator cleaning device 1.

[0052] In some embodiments, a camera 9 is also provided which is connected to the housing 5, wherein the camera 9 is arranged on an outer wall of the housing 5 facing away from the first end surface 51.

[0053] The camera 9 is located, for example, at one end of the housing 5 where the cleaning brush component 7 is located. The water level indicator cleaning device 1 has a visual recognition system that automatically identifies the cleaning device based on the data transmitted by the camera 9. The water level indicator cleaning device 1 has a controller connected to the camera 9, the movable component 3, the cleaning brush component 7, the vacuum component 2, and the pressure sensor, respectively, which in turn enables the automatic identification of the contamination, controls the movable component 3 such that the water level indicator cleaning device 1 can approach the contamination and clean the contamination on the water level indicator 1, and simultaneously controls the output power of the vacuum component 2 and the output power of the magnetic component 6 such thatthat the adsorption force of the water level indicator cleaning device 1 is changed and the movement of the water level indicator cleaning device 1 on the water level indicator 1 is facilitated. The visual identification system is a prior art visual identification system.

[0054] Furthermore, the water level indicator cleaning device 1 includes a battery and a power supply component and a power supply line 10, wherein the power supply component is attached to the housing 5, the output end of the power supply line 10 is connected to the power supply component, and the power supply component is connected to the battery, the camera 9, the movable component 3, the cleaning brush component 7, the negative pressure component 2, and the pressure sensor to perform the power supply, and when the power supply line 10 is unable to perform the power supply, the battery supplies power to the camera 9, the movable component 3, the cleaning brush component 7, the negative pressure component 2, and the pressure sensor.

[0055] The power supply line 10 may also be partially attached to an object such as a post or tree near the river to prevent the water level indicator cleaning device 1 from falling and being washed away by the river.

[0056] In describing the present invention, it is to be understood that azimuth or positional relationships referring to the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," etc., include the azimuth or positional relationships based on the figures. They are intended to facilitate and simplify the description of the present invention, rather than to indicate or imply that the stated device or component must have a particular orientation, be constructed, and operate in a particular orientation. Therefore, they should not be construed as limiting the present invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply a relative importance or to imply the set of technical features specified. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "a plurality" means at least two, e.g., two or three, unless expressly and specifically limited otherwise.

[0058] In the present invention, the terms "assembling", "connecting", "connecting" and "attaching" are to be understood in a broad sense unless expressly stated or limited otherwise. For example, it may be a fixed connection, a detachable connection or a one-piece connection; it may be a mechanical connection, an electrical connection or a communicative connection; it may be a direct connection or an indirect connection via an intermediate medium, and it may be a connection within the two elements or an interaction between the two elements, unless expressly stated otherwise. For general technical personnel, the specific meanings of the above terms in the present invention should be understood according to the specific circumstances.

[0059] In the present invention, unless expressly stated and limited otherwise, a first feature located "on top of" or "below" a second feature may be direct contact between the first and second features, or indirect contact between the first and second features via an intermediate medium. And a first feature located "above," "over," and "on top of" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply mean that the first feature has a greater horizontal height than the second feature. A first feature located "below," "under," and "on the bottom of" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply mean that the first feature has a lower horizontal height than the second feature.

[0060] In the present invention, the terms "an embodiment," "some embodiments," "examples," "specific examples," or "some examples" mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present description, the schematic representations of the above terms do not have to refer to the same embodiments or examples. Rather, the specific features, structures, materials, or characteristics described above may be combined in one or more embodiments in an appropriate manner.Furthermore, one skilled in the art may combine various embodiments or examples and features of various embodiments or examples described in the present specification without contradicting each other.

[0061] Although embodiments of the present invention have been illustrated and described above, it is to be understood that the above embodiments are exemplary and not limiting of the present invention, and that those of ordinary skill in the art may make changes, modifications, substitutions, and variations of the above embodiments within the scope of the present invention.

Claims

[1] Cleaning device for water level indicators, characterized by that it includes: a housing and a plurality of magnetic components, the housing having a first end face, the housing being connected to the magnetic components, the magnetic components being arranged on the first end face, and the plurality of magnetic components being arranged spaced apart from one another in the circumferential direction of the first end face; a sealing strip component, the sealing strip component being disposed on the first end face, the sealing strip component and the first end face enclosing a suction pressure chamber; a negative pressure component and a movable component, wherein the negative pressure component and the movable component are each connected to the housing, the movable component and the negative pressure component are arranged in the suction pressure chamber, and the pressure output from the negative pressure component is divided into a first pressure and a second pressure, wherein at the first pressure the housing is attached to the water level indicator and at the second pressure the movable component moves to drive the housing to move relative to the water level indicator, the first pressure being smaller than the second pressure. [2] Cleaning device for water level indicators according to claim 1, characterized byin that the movable component comprises a first movable track element and a second movable track element, wherein the first movable track element and the second movable track element are arranged spaced from one another in the longitudinal direction of the housing. [3] Cleaning device for water level indicators according to claim 2, characterized by in that the vacuum component comprises a vacuum pump and an outlet opening, wherein the vacuum pump inlet is arranged in the suction pressure chamber, the vacuum pump is connected to the housing, the vacuum pump outlet is connected to an outlet pipe and the outlet of the outlet pipe is arranged on the outer wall of the housing facing away from the first end face. [4] Cleaning device for water level indicators according to claim 1, characterized bythat the dimension of the sealing strip component in the thickness direction of the housing is larger than the dimension of the movable component in the thickness direction of the housing. [5] Cleaning device for water level indicators according to claim 1, characterized by that the material of the sealing strip component is polyurethane rubber. [6] Cleaning device for water level indicators according to claim 1, characterized by that structural adhesive is applied between the sealing strip component and the first end face. [7] Cleaning device for water level indicators according to claim 1, characterized by that it further comprises a cleaning brush component, wherein the cleaning brush component is connected to the housing, and the cleaning brush component is provided at either of the two ends of the housing in the height direction. [8] Cleaning device for water level indicators according to claim 7, characterized bythat the cleaning brush component further comprises a first pump and a spray gun, and a liquid storage chamber is provided in the housing, wherein the inlet end of the first pump is connected to the liquid storage chamber, the output end of the first pump is detachably connected to the inlet of the spray gun, and the outlet of the spray gun faces the cleaning brush component. [9] Cleaning device for water level indicators according to claim 1, characterized by that it further comprises a handle, wherein the handle is connected to the outer wall of the housing. [10] Cleaning device for water level indicators according to one of claims 1 to 9, characterized by that it further comprises a camera, wherein the camera is connected to the housing, and that the camera is arranged on the outer wall of the housing facing away from the first end face.

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