Non-contact liquid level sensor setting structure

Abstract

The utility model relates to the field of scrubber and other cleaning machines, in particular to a non-contact liquid level sensor setting structure which comprises a sensor mounting shell, a cover plate, a threaded connecting sleeve and a non-contact liquid level sensor. The sensor installation shell is divided into a sensor installation cavity and a threaded connection end which are connected together, a non-contact liquid level sensor is embedded in the inner side of the sensor installation cavity, the cover plate and the sensor installation cavity are buckled to form a cylindrical whole, and the threaded connection sleeve is in threaded connection with the threaded connection end. And an external thread B connected with a sewage tank of the scrubber is arranged on the peripheral surface of the threaded connecting sleeve. The liquid level sensor can effectively avoid the problem that a float switch is easy to block and lose efficacy when being used for detecting the liquid level, has stable waterproof performance, can ensure the reliability and detection precision of the sensor in a severe environment, is simple and reliable in overall structure, and is convenient to process, manufacture, assemble, disassemble and maintain.

Description

Technical Field

[0001] This utility model relates to the field of floor scrubbers and other cleaning machines, specifically a non-contact liquid level sensor setting structure. Background Technology

[0002] Existing floor scrubbers are generally equipped with a wastewater tank, which, in conjunction with a vacuum pump and squeegee, sucks the wastewater generated during floor cleaning into the tank. As a highly automated electromechanical device, the wastewater level in the tank needs to be fed back to the main controller of the floor scrubber. If the wastewater level exceeds the set value, the floor scrubber must return to the workstation to empty the wastewater, and the wastewater level also needs to be displayed on the HMI screen as a reference for human-machine interaction.

[0003] Current floor scrubbers typically have several float switches installed in their wastewater tanks. When the liquid level triggers the corresponding float switch, the sensor signal is fed back to the main controller to complete the liquid level detection. However, because the float switches have low accuracy and are greatly affected by the water level and liquid properties, they are easily contaminated by dirty liquids, which can cause them to jam and malfunction. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a non-contact liquid level sensor mounting structure.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A non-contact liquid level sensor mounting structure includes a sensor mounting housing, a cover plate, a threaded connecting sleeve, and a non-contact liquid level sensor.

[0007] The sensor mounting housing consists of a sensor mounting cavity and a threaded connection end connected together. The sensor mounting cavity is located at the lower part of the sensor mounting housing. Several sensor embedding slots are formed along the length of the sensor mounting cavity on its inner side. Each sensor embedding slot is fitted with a non-contact liquid level sensor. A cover plate is provided on one side of the sensor mounting cavity via a hinge. After the cover plate is fastened to the sensor mounting cavity, a cylindrical whole with an opening only at the top is formed. The threaded connection end is located at the upper part of the sensor mounting housing. A through hole is provided inside the threaded connection end. The inner cavity of the cylindrical whole formed by the cover plate and the sensor mounting cavity communicates with the through hole. An external thread A is provided on the outer circumferential surface of the threaded connection end. An internal thread is provided on the inner side of the threaded connection sleeve. The internal thread of the threaded connection sleeve is threadedly connected to the external thread A of the threaded connection end. An external thread B for connecting to the wastewater tank of a floor scrubber is provided on the outer circumferential surface of the threaded connection sleeve.

[0008] A limiting flange is also connected between the sensor mounting cavity and the threaded connection end. The outer periphery of the limiting flange is larger than or equal to the outer periphery of the cylindrical whole formed by the cover plate and the sensor mounting cavity.

[0009] The outer circumferential contour of the threaded connection sleeve is greater than or equal to the outer circumferential contour of the limiting flange.

[0010] A plurality of snap-fit ​​portions are formed on the side of the cover plate away from the hinge to which the cover plate is connected. A snap-fit ​​edge is protruding on the outer side of the sensor mounting cavity and is configured to cooperate with each of the snap-fit ​​portions. Each snap-fit ​​portion is snapped into the corresponding snap-fit ​​edge.

[0011] After the non-contact liquid level sensor is installed and fastened to the cover plate to form a cylindrical whole, the inner cavity of the cylindrical whole is filled with epoxy resin.

[0012] The inner side of the cover plate is provided with several reinforcing ribs.

[0013] The advantages and positive effects of this utility model are as follows:

[0014] This utility model, through the coordinated design of a sensor mounting housing, cover plate, threaded connecting sleeve, and non-contact liquid level sensor, can effectively avoid the problem of easy jamming and failure that occurs when using a float switch to detect liquid level. It has stable waterproof performance to ensure the reliability and detection accuracy of the sensor in harsh environments. The overall structure is simple and reliable, easy to process and manufacture, and also easy to install, disassemble, and maintain. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an enlarged view of point A.

[0017] In the diagram: 1 is the sensor mounting housing, 101 is the sensor mounting cavity, 1011 is the sensor embedding slot, 1012 is the snap-fit ​​edge, 102 is the threaded connection end, 1021 is the through hole, 103 is the limiting flange, 2 is the cover plate, 201 is the snap-fit ​​part, 202 is the reinforcing rib, 3 is the threaded connection sleeve, 301 is the external thread B, 4 is the non-contact liquid level sensor, and 5 is the hinge. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail.

[0019] A non-contact liquid level sensor mounting structure, such as Figure 1-2As shown, this embodiment includes a sensor mounting housing 1, a cover plate 2, a threaded connecting sleeve 3, and a non-contact liquid level sensor 4.

[0020] The sensor mounting housing 1 consists of a sensor mounting cavity 101 and a threaded connection end 102 connected together. The sensor mounting cavity 101 is located at the lower part of the sensor mounting housing 1. Three sensor mounting slots 1011 are formed along the length of the sensor mounting cavity 101 on its inner side. Each sensor mounting slot 1011 contains a non-contact liquid level sensor 4. A cover plate 2 is provided on one side of the sensor mounting cavity 101 along its length via a hinge 5. After the cover plate 2 is fastened to the sensor mounting cavity 101, a cylindrical whole with an opening only at the top is formed. In this embodiment, the non-contact liquid level sensors 4 are all commercially available capacitive non-contact liquid level sensors. The shape of the sensor mounting slots 1011 corresponds to the outer contour of the non-contact liquid level sensor 4. The positions of the three non-contact liquid level sensors 4 correspond to 20%, 50%, and 80% of the sewage tank level, respectively. The non-contact liquid level sensors 4 are all connected to the main controller of the floor scrubber via wires, using existing technology.

[0021] The threaded connection end 102 is located on the upper part of the sensor mounting housing 1. A through hole 1021 is provided inside the threaded connection end 102, and the inner cavity of the cylindrical assembly formed by the cover plate 2 and the sensor mounting cavity 101 communicates with the through hole 1021. The wires connected to the non-contact liquid level sensor 4 all pass through the through hole 1021 and exit the aforementioned cylindrical assembly. The outer circumferential surface of the threaded connection end 102 has an external thread A, and the inner side of the threaded connection sleeve 3 has an internal thread. The internal thread of the threaded connection sleeve 3 is threadedly connected to the external thread A of the threaded connection end 102. The outer circumferential surface of the threaded connection sleeve 3 has an external thread B301 for connection to the wastewater tank of the floor scrubber. The threaded connection sleeve 3 can be threadedly connected to the outer surface of the wastewater tank of the floor scrubber via the external thread B301.

[0022] Specifically, such as Figure 2 As shown, in this embodiment, a limiting flange 103 is also connected between the sensor mounting cavity 101 and the threaded connection end 102. The limiting flange 103 serves to axially limit the threaded connection sleeve 3. In this embodiment, the sensor mounting cavity 101, the limiting flange 103, and the threaded connection end 102 are an integral structure made of nylon, which can effectively prevent water and corrosion. The outer periphery of the limiting flange 103 is larger than or equal to the outer periphery of the cylindrical whole formed by the cover plate 2 and the sensor mounting cavity 101, and the outer periphery of the threaded connection sleeve 3 is larger than or equal to the outer periphery of the limiting flange 103, which facilitates the direct insertion of the non-contact liquid level sensor installation structure into the interior of the floor scrubber's wastewater tank after installation.

[0023] Specifically, in this embodiment, three reinforcing ribs 202 are provided on the inner side of the cover plate 2 along its length to enhance its strength. The reinforcing ribs 202 can be integrally formed with the cover plate 2 and are made of nylon. Three latching portions 201 are formed on the side of the cover plate 2 away from the hinge 5 to which it is connected. A latching edge 1012 protrudes from the outer side of the sensor mounting cavity 101 to engage with each latching portion 201. Each latching portion 201 engages with the latching edge 1012. The specific structure of the latching portions 201 and the latching edges 1012 in this embodiment can adopt existing forms. The engaging arrangement of the latching portions 201 and the latching edges 1012 facilitates the fastening and fixing of the cover plate 2 and the sensor mounting cavity 101, and ensures stable fastening after fastening. After the non-contact liquid level sensor 4 is installed in the sensor mounting cavity 101 and fastened to the cover plate 2 to form a cylindrical whole, the inner cavity of the cylindrical whole is filled with epoxy resin, which can fully and effectively play a sealing role, preventing water from entering the inner cavity of the cylindrical whole and affecting the use of the non-contact liquid level sensor 4. The stable waterproof performance can ensure the reliability and detection accuracy of the sensor in harsh environments.

[0024] Working principle:

[0025] During installation, the sensor mounting housing 1, cover plate 2, threaded connecting sleeve 3, and non-contact liquid level sensor 4 are assembled. The wires connected to the non-contact liquid level sensor 4 pass through through holes 1021, exiting the cylindrical assembly formed by the sensor mounting cavity 101 and the cover plate 2, and are connected to the control system of the floor scrubber. Epoxy resin is then poured into the inner cavity of the cylindrical assembly through through holes 1021. After the non-contact liquid level sensor assembly passes waterproof and circuit tests, it is installed on the floor scrubber's wastewater tank via the threaded connecting sleeve 3. As the liquid level in the wastewater tank changes, the capacitance measured by the non-contact liquid level sensor 4 changes, and the non-contact liquid level sensor 4 sends a corresponding signal back to the floor scrubber's main controller.

Claims

1. A non-contact liquid level sensor arrangement, characterized by: The sensor mounting shell (1) is divided into a sensor mounting cavity (101) and a threaded connection end (102) connected together, the sensor mounting cavity (101) is located at the lower part of the whole of the sensor mounting shell (1), a plurality of sensor inlaid clamping grooves (1011) are formed on the inner side of the sensor mounting cavity (101) along the length direction of the sensor mounting cavity (101), the non-contact liquid level sensor (4) is inlaid in each sensor inlaid clamping groove (1011) respectively, the length direction side of the sensor mounting cavity (101) is provided with a cover plate (2) through a hinge (5), the cover plate (2) and the sensor mounting cavity (101) are buckled to form a cylindrical whole with an opening at the upper end, the threaded connection end (102) is located at the upper part of the whole of the sensor mounting shell (1), a through hole (1021) is formed in the inner part of the threaded connection end (102), the inner cavity of the cylindrical whole formed by the cover plate (2) and the sensor mounting cavity (101) is in communication with the through hole (1021), the outer periphery of the threaded connection end (102) is provided with external threads A, the inner side of the threaded connection sleeve (3) is provided with internal threads, the internal threads of the threaded connection sleeve (3) are connected with the external threads A of the threaded connection end (102) through threads, the outer periphery of the threaded connection sleeve (3) is provided with external threads B (301) for connecting with the sewage tank of the scrubber. The sensor mounting cavity (101) and the threaded connection end (102) are further connected with a limiting flange part (103), the outer periphery contour size of the outer periphery of the limiting flange part (103) is greater than or equal to the outer periphery contour size of the cylindrical whole formed by the cover plate (2) and the sensor mounting cavity (101).

2. The non-contact liquid level sensor arrangement of claim 1, wherein: The outer periphery contour size of the outer periphery of the threaded connection sleeve (3) is greater than or equal to the outer periphery contour size of the outer periphery of the limiting flange part (103).

3. The non-contact liquid level sensor arrangement of claim 2, wherein: A plurality of buckle parts (201) are formed on the side of the cover plate (2) away from the hinge (5) connected with the cover plate (2), a clamping edge (1012) matched with each buckle part (201) is protruded on the outer side of the sensor mounting cavity (101), and each buckle part (201) is clamped with the clamping edge (1012) correspondingly.

4. The non-contact liquid level sensor arrangement of claim 1, wherein: After the sensor mounting cavity (101) is installed with the non-contact liquid level sensor (4) and buckled with the cover plate (2) to form a cylindrical whole, the inner cavity of the cylindrical whole is filled with epoxy resin glue.

5. The non-contact liquid level sensor arrangement of claim 1, wherein: The inner side of the cover plate (2) is provided with a plurality of reinforcing rib plates (202).

6. The non-contact liquid level sensor arrangement of claim 1, wherein: ​

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