Integral pipeline type liquid level sensor

Abstract

The utility model discloses an integral pipeline type liquid level sensor, which relates to the technical field of sensors and comprises a connecting pipeline, one side of the middle of the connecting pipeline is fixedly connected with a sensor mechanism, and one side of the connecting pipeline is fixedly provided with a driving mechanism. A sensor mechanism of the device is connected with the water tank through a connecting pipeline, liquid level detection is achieved through the optical principle, infrared light emitted by the emitting lamp beads enters the transparent boss, the light is not reflected when water exists, and the system judges that the water exists in the water tank; the mechanism is small in size, the mechanism and the connecting pipeline are integrally installed on one side of the connecting pipeline, the mechanism is matched with a small electric appliance, and in addition, the PCB is installed through the clamping cylinder and is convenient to dismantle and overhaul; the anti-dazzling screen is matched with the elastic clamping block through the clamping groove, can be easily disassembled through a wrench, is convenient to overall maintain and flexible to use and install, and is suitable for various space-limited devices.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sensor technical field, especially relate to a whole type pipeline formula liquid level sensor. BACKGROUND

[0002] Liquid level sensor as a kind of important measuring equipment, liquid level in container can be detected and liquid level information is converted into electrical signal, digital signal and the signal of easy identification and processing, its working principle is rich and varied, static pressure type liquid level sensor is based on the direct proportion relationship between liquid static pressure and liquid level height, by pressure sensitive element liquid pressure is changed into electrical signal to realize liquid level measurement;Capacitance type liquid level sensor relies on the difference of different medium dielectric constant, liquid level change causes sensor capacitance change to measure liquid level;Ultrasonic liquid level sensor is by emitting ultrasonic wave, according to the propagation characteristics of ultrasonic wave in medium, measure reflected wave time to determine liquid level;

[0003] Liquid level sensor has wide application in industrial production, sewage treatment, petrochemical industry, water conservancy and hydropower and many other fields, can monitor liquid level condition in real time, provides key data support for automation control, liquid level alarm, is of great significance to guarantee the stable operation of production process, at present, in the household appliances and industrial equipment containing water tank, detecting whether water tank is short of water is common demand, traditional way often uses float to detect water level, but the structure has the problem of large space occupation, it is difficult to be applicable to small household appliances or equipment, therefore, it is necessary to design a new type of liquid level sensor to meet the liquid level detection demand of small volume equipment, the utility model utilizes infrared photoelectricity to cooperate three-prism optical structure, aims at developing a new type of liquid level sensor. CONTENT OF UTILITY MODEL

[0004] In view of the problems mentioned in the background art, the utility model aims at providing a whole type pipeline formula liquid level sensor to solve the problem of large space occupation during application of prior art and unable to be combined with pipeline to reduce space occupation.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A whole type pipeline formula liquid level sensor, including connecting pipeline, the connecting pipeline middle part one side is fixedly connected with sensor mechanism, one side of the connecting pipeline is fixedly installed with driving mechanism, the driving mechanism is fixedly installed with cleaning mechanism on the side close to sensor mechanism, the cleaning mechanism is rotatably connected in the inside of connecting pipeline, the outside of cleaning mechanism and the inside of connecting pipeline are connected in place;

[0007] The sensor mechanism comprises a transparent shell fixedly connected to one side of the middle outer surface of the connecting pipe, a groove is formed on the side of the transparent shell close to the connecting pipe, an arc-shaped transparent sealing light transmission plate is fixedly connected inside the groove, and a detection assembly is arranged inside the transparent shell.

[0008] As a preferred technical solution, the detection assembly comprises a light shield and an elastic clamping block, clamping grooves are formed at both ends of the bottom outer side of the light shield, the elastic clamping block is fixedly connected to both ends of the inner and outer sides of the transparent shell, the elastic clamping block is clamped inside the clamping groove, the light shield is clamped inside the transparent shell through the elastic clamping block, clamping cylinders are arranged at both sides of the top of the light shield, a PCB board is clamped and installed through the clamping cylinders, keys are fixedly connected to both sides of the top of the light shield, an inclined surface is arranged on the outer side of the key and is arranged vertically at an angle of 45 degrees close to the pipe, a transmitting lamp bead and a receiving lamp bead are respectively arranged on the inner sides of the two keys, a three-stage tube is arranged on the PCB board, transparent bosses are arranged at both ends of the inner side of the transparent shell close to the connecting pipe, the upper end of the transparent boss is arranged in an isosceles triangle shape, and the inclined surface of the transparent boss is parallel to the transmitting lamp bead and the receiving lamp bead.

[0009] As a preferred technical solution, a wire is fixedly connected to the top of the PCB board, and an electric plug is fixedly connected to the outer end of the wire.

[0010] As a preferred technical solution, the driving mechanism comprises a sleeve fixedly connected to the input end of the connecting pipe, a cross is fixedly connected to one end of the inside of the sleeve close to the connecting pipe, a turbine is rotatably connected to one side of the sleeve close to the cross, a connecting shaft is fixedly connected to one side of the turbine close to the connecting pipe, and the end of the connecting shaft penetrates through the cross and is connected with the cleaning mechanism.

[0011] As a preferred technical solution, the cleaning mechanism comprises a rotating shaft fixedly connected to the inside of the connecting shaft close to the connecting pipe, a fixed shaft is fixedly installed at the middle of the rotating shaft, and cleaning groups are fixedly connected at equal intervals on the outer surface of the fixed shaft.

[0012] As a preferred technical solution, the cleaning group comprises a fixed frame fixedly connected to the outer surface of the fixed shaft in a ring shape at equal intervals, a fixed plate is fixedly installed on the outer side of the fixed frame, a cleaning brush plate is fixedly connected to the outer side of the fixed plate, and the outer side of the cleaning brush plate is connected to the arc-shaped transparent sealing light transmission plate.

[0013] As a preferred technical solution, both ends of the fixed shaft are conical, and the corners of the outer surface of the transparent shell are arc-shaped.

[0014] As a preferred technical solution, the sleeve is fixedly connected with a threaded interface on the side away from the connecting pipe, and the threaded interface is fixedly connected with a sealing gasket ring inside.

[0015] As a preferred technical solution, the outer side of the threaded interface is provided with anti-skid knob handles at equal intervals, the outer surface of the anti-skid knob handles is provided with anti-skid grooves at equal intervals, and the connecting pipe is also fixedly connected with a threaded interface on the end away from the sleeve.

[0016] In summary, the utility model mainly has the following beneficial effects:

[0017] First, the sensor mechanism of the device is connected with the water tank through the connecting pipe, and the liquid level detection is realized by using the optical principle. The infrared light emitted by the emitting lamp bead enters the transparent boss. When there is water, the light is not reflected, and the system determines that the water tank has water. When there is no water, the reflected light is received by the receiving lamp bead, and it is determined that the water tank has no water. The mechanism is small in size and is integrally installed on one side of the connecting pipe, which is suitable for small appliances. In addition, the PCB is installed by clamping the cylinder, which is convenient for disassembly and maintenance. The sunshade is matched with the elastic clamping block by clamping groove, which can be easily disassembled by using a wrench. The overall maintenance is convenient, the installation is flexible, and it is suitable for various space-limited equipment.

[0018] Second, the driving mechanism and the cleaning mechanism of the device work cooperatively to ensure the stable operation of the liquid level sensor. The connecting pipe is connected with the water tank pipeline system through the threaded interface with the anti-skid knob handle, which increases the friction force and facilitates quick installation. When in operation, the water flow in the water tank flows into the sleeve to drive the turbine to rotate, and the turbine drives the connecting shaft and the rotating shaft to rotate, thereby driving the cleaning brush plate on the fixed frame to rotate and scratch the arc-shaped transparent sealing light-transmitting plate. This cleaning method driven by water flow can avoid the influence of water scale on light propagation and reflection, thereby maintaining the detection accuracy of the sensor for a long time and providing reliable data support for stable operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 is a schematic diagram of the bottom view structure of the utility model;

[0021] Figure 3 is a schematic diagram of the top view structure of the PCB in the disassembled state of the utility model;

[0022] Figure 4 is a schematic diagram of the rear view structure of the PCB in the disassembled state of the utility model;

[0023] Figure 5 is a schematic diagram of the rear view structure of the PCB, the sunshade and the disassembled state of the utility model;

[0024] Figure 6It is the PCB board dismantling, shading piece and dismantling state overhead structure schematic view of the utility model;

[0025] Figure 7 It is the driving mechanism dismantling state structure schematic view of the utility model;

[0026] Figure 8 It is the cleaning mechanism structure schematic view of the utility model;

[0027] Figure 9 It is the principle view of the utility model.

[0028] Fig. 1, connecting pipeline;2, sensor mechanism;21, transparent shell;22, groove;23, arc-shaped transparent sealing light transmission plate;24, detection assembly;241, shading piece;242, elastic clamping block;243, clamping groove;244, PCB board;245, key;246, emitting lamp bead;247, receiving lamp bead;248, transparent boss;249, wire;2410, electric plug;2411, clamping cylinder;3, driving mechanism;31, sleeve;32, cross;33, turbine;34, connecting shaft;4, cleaning mechanism;41, rotating shaft;42, fixed shaft;43, cleaning group;431, fixed frame;432, fixed plate;433, cleaning brush plate;5, threaded interface;6, anti-skid knob handle. DETAILED DESCRIPTION

[0029] EMBODIMENT

[0030] REFERENCE Figures 1 to 9 The embodiment of the utility model provides a whole type pipeline liquid level sensor, including connecting pipeline 1, one side fixed connection has sensor mechanism 2 in connecting pipeline 1 middle part, one side fixed installation has driving mechanism 3 in connecting pipeline 1, driving mechanism 3 is close to the fixed installation of cleaning mechanism 4 in one side of sensor mechanism 2, cleaning mechanism 4 is rotatably connected in the inside of connecting pipeline 1, and the outside of cleaning mechanism 4 and the inside of connecting pipeline 1 are connected in place;

[0031] Sensor mechanism 2 includes a transparent shell 21, which is fixedly connected to one side of the outer surface of the middle of the connecting pipe 1, and a groove 22 is formed on one side of the connecting pipe 1 close to the transparent shell 21. The inside of the groove 22 is fixedly connected with an arc-shaped transparent sealing light transmission plate 23. The inside of the transparent shell 21 is provided with a detection assembly 24. When the whole pipeline liquid level sensor works, the connecting pipe 1 is used to be connected with the water tank pipeline system. The transparent shell 21 of the sensor mechanism 2 is fixed on one side of the outer surface of the middle of the connecting pipe 1. The inside detection assembly 24 realizes liquid level detection by cooperation of the emitting lamp bead 246 and the receiving lamp bead 247. When the water tank has water, the infrared light emitted by the emitting lamp bead 246 enters the arc-shaped transparent sealing light transmission plate 23 of the groove 22 through the transparent shell 21, and cannot be reflected due to the light refraction characteristics. The detection assembly 24 determines that the water tank has water accordingly. When the water tank is short of water, the infrared light entering the arc-shaped transparent sealing light transmission plate 23 will be reflected. The receiving lamp bead 247 receives the reflected light. The detection assembly 24 determines that the water tank is short of water, and the driving mechanism 3 and the cleaning mechanism 4 work cooperatively. The water flow in the water tank flows into the connecting pipe 1 and enters the sleeve 31 connected with the driving mechanism 3. The sleeve 31 in the turbine 33 is pushed to rotate. The turbine 33 drives the connecting shaft 34 and the rotating shaft 41 to rotate, and further drives the cleaning brush plate 433 on the fixed frame 431 in the cleaning mechanism 4 to rotate, so as to scratch and clean the arc-shaped transparent sealing light transmission plate 23, so as to maintain the detection accuracy.

[0032] Reference Figures 1-6 and Figure 9The detection assembly 24 comprises a light shield 241 and an elastic clamping block 242, the bottom outer side of the light shield 241 is provided with a clamping groove 243 at both ends, the elastic clamping block 242 is fixedly connected to the inner and outer sides of the transparent shell 21, the elastic clamping block 242 is clamped in the clamping groove 243, the light shield 241 is clamped in the transparent shell 21 through the elastic clamping block 242, the top of the light shield 241 is provided with a clamping cylinder 2411, the light shield 241 is clamped and installed with a PCB 244 through the clamping cylinder 2411, the top of the light shield 241 is fixedly connected with a key 245, the outer side of the key 245 is provided with an inclined surface which is vertically arranged at an angle of 45 degrees near the pipeline, the inner sides of the two keys 245 are respectively provided with a transmitting lamp bead 246 and a receiving lamp bead 247, the PCB 244 is provided with a triode, the inner side of the transparent shell 21 near the connecting pipe is provided with a transparent boss 248 at both ends, the upper end of the transparent boss 248 is arranged in an isosceles triangle, the transmitting lamp bead 246 and the receiving lamp bead 247 are parallel to the inclined surface of the transparent boss 248, the top of the PCB 244 is fixedly connected with a wire 249, the outer end of the wire 249 is fixedly connected with an electric plug 2410, when the detection assembly 24 works, the light shield 241 is clamped with the elastic clamping block 242 at both ends of the bottom outer side of the clamping groove 243, and is stably installed in the transparent shell 21, the PCB is installed on the top of the light shield 241 through the clamping cylinder 2411, and provides circuit support for the entire detection assembly 24, when the device operates, the electric plug 2410 is electrified, the current is transmitted to the PCB through the wire 249, the triode on the PCB works, controls the transmitting lamp bead 246 to emit infrared light, the transmitting lamp bead 246 is parallel to the inclined surface of the transparent boss 248, and the emitted light is emitted to the transparent boss 248, in the water state, the light passes through the transparent boss 248 and the arc-shaped transparent sealing light plate 23 and enters the water, because of the difference in refractive index between the water and the surrounding medium, the light cannot be reflected back to the receiving lamp bead 247; in the water shortage state, the light is reflected on the inclined surface of the transparent boss 248 and returns along the path to be received by the receiving lamp bead 247 which is parallel to the inclined surface of the transparent boss 248, the key 245 on the light shield 241 is provided with an inclined surface which is vertically arranged at an angle of 45 degrees near the pipeline, the light propagation path is optimized, and the accuracy of detection is ensured.

[0033] Reference Figures 7-8, the driving mechanism 3 includes sleeve 31, sleeve 31 is fixedly connected to the input end of the connecting pipe, the inside of sleeve 31 is fixedly connected with cross 32 near one end of the connecting pipe, cross 32 is rotatably connected with turbine 33 near one side of the inside of sleeve 31, turbine 33 is fixedly connected with connecting shaft 34 near one side of the connecting pipe, the end of connecting shaft 34 penetrates cross 32 and is connected with cleaning mechanism 4, cleaning mechanism 4 includes rotating shaft 41, rotating shaft 41 is fixedly connected to the inside of connecting shaft 34 near the connecting pipe, the middle part of rotating shaft 41 is fixedly installed with fixed shaft 42, fixed shaft 42 is fixedly connected with cleaning group 43 at equal intervals on the outside, cleaning group 43 includes fixed frame 431, fixed frame 431 is fixedly connected to the outer surface of fixed shaft 42 in ring shape at equal intervals, fixed plate 432 is fixedly installed on the outside of fixed frame 431, cleaning brush plate 433 is fixedly connected on the outside of fixed plate 432, the outside of cleaning brush plate 433 and arc-shaped transparent sealing light transmission plate 23 are connected, when the water in the water tank flows through the connecting pipe into sleeve 31, the water flow impacts turbine 33 on cross 32 near one end of the inside of sleeve 31, since turbine 33 is rotatably connected with cross 32, it starts to rotate under the push of the water flow, the rotation of turbine 33 drives connecting shaft 34 fixedly connected therewith to rotate, the end of connecting shaft 34 penetrates cross 32 and is connected with rotating shaft 41 of cleaning mechanism 4, so as to drive rotating shaft 41 to rotate in the inside of the connecting pipe, fixed shaft 42 fixed in the middle part of rotating shaft 41 rotates synchronously with rotating shaft 41, fixed frame 431 arranged in ring shape on the outside of fixed shaft 42 also rotates, cleaning brush plate 433 on fixed plate 432 on the outside of fixed frame 431 also makes circular motion, since cleaning brush plate 433 is connected with arc-shaped transparent sealing light transmission plate 23 on the outside, in the process of rotation, cleaning brush plate 433 constantly scratches arc-shaped transparent sealing light transmission plate 23, so as to clean the impurities, scale and the like attached to the surface of arc-shaped transparent sealing light transmission plate 23, ensure the light transmission of arc-shaped transparent sealing light transmission plate 23, maintain the accuracy of liquid level sensor detection.

[0034] Reference Figure 8The two ends of the fixed shaft 42 are provided in a conical shape, the corners of the outer surface of the transparent shell 21 are provided in a circular arc shape, the side away from the connecting pipe of the sleeve 31 is fixedly connected with a threaded interface 5, the inside of the threaded interface 5 is fixedly connected with a sealing gasket ring, the outer side of the threaded interface 5 is provided with anti-skid knob handles 6 at equal intervals, the outer surface of the anti-skid knob handles 6 is provided with anti-skid grooves at equal intervals, the end away from the sleeve 31 of the connecting pipe 1 is also fixedly connected with a threaded interface 5, the two ends of the fixed shaft 42 are provided in a conical shape, so that the water flow damping is reduced, the rotation of the fixed shaft 42 is more smooth, and meanwhile the water flow is relatively smooth, and meanwhile installation and positioning are facilitated, the corners of the outer surface of the transparent shell 21 are provided in a circular arc shape, which is considered from the safety and protection, so as to prevent scratching the operator during installation and maintenance, and reduce damage to the transparent shell 21 when an external force collides, so as to protect the internal detection assembly 24, the threaded interface 5 away from the connecting pipe of the sleeve 31 is used for being connected with the water tank pipeline system, when installation, the sensor is connected with the pipeline closely by rotating the threaded interface 5, the sealing gasket ring in the inside of the threaded interface 5 is extruded when the thread is tightened, so as to fill the gap between the threads and prevent water leakage, so as to ensure the system sealing, the anti-skid knob handles 6 and the anti-skid grooves on the outer side of the threaded interface 5 increase the friction between the hands of the operator and the threaded interface 5, so that the threaded interface 5 is more easily and stably rotated, so that rapid installation is realized, and the threaded interface 5 at the end away from the sleeve 31 of the connecting pipe 1 is also used for being connected with other components, so that it is ensured that the whole pipeline type liquid level sensor can adapt to different pipeline connection requirements.

[0035] Principle and advantages: the sensor mechanism 2 of the device is carefully arranged, stable connection is realized between the connecting pipe 1 and the water tank; in the liquid level detection process, when the water tank is in a water state, the emission lamp bead 246 is started, the infrared light emitted by the emission lamp bead 246 enters the transparent boss 248 of the transparent shell 21; due to the optical properties of water, the light cannot be reflected, at this time, the system determines that the water tank is in a water state; when the water tank is in a water shortage state, the infrared light of the emission lamp bead 246 enters the transparent boss 248, and the light is reflected due to the change of the surrounding medium; the receiving lamp bead 247 receives the reflected light, so that it is detected that the water tank is in a water shortage state;

[0036] From the structural design, the whole sensor mechanism 2 is small in size, is integrally arranged with the connecting pipeline 1 and is installed on one side of the connecting pipeline 1; the compact design can perfectly adapt to the use requirement of small appliances, effectively solves the problem that the traditional liquid level detection device is difficult to install in small equipment; in the equipment maintenance aspect, the PCB is installed through the clamping cylinder 2411; when the PCB needs to be overhauled, the operator only needs to remove the PCB on the clamping cylinder 2411, and the maintenance operation can be conveniently performed; in addition, the sensor mechanism 2 adopts the design that the clamping groove 243 cooperates with the elastic clamping block 242; when the light shield 241 is disassembled, the elastic clamping block 242 is deformed by using a wrench to lift a corner of the light shield, and the light shield can be easily disassembled from the inside of the transparent shell 21; the series of designs not only facilitate quick overhaul and maintenance, but also show high flexibility in the overall use and installation process; the smaller size further improves the convenience and adaptability of use and installation, and the sensor mechanism 2 can be widely applied to various devices with strict space requirements.

[0037] The device innovatively combines the driving mechanism 3 and the cleaning mechanism 4, provides a powerful guarantee for the stable operation and high-precision detection of the liquid level sensor; during installation, the connecting pipeline 1 is connected with the water tank pipeline system to be detected through the threaded interface 5; the outer surface of the threaded structure is provided with an anti-skid knob 6, which increases the friction during operation, so that the operator can more conveniently and quickly complete the installation work.

[0038] During the operation of the device, the water flow in the water tank flows into the sleeve 31; the power of the water flow drives the turbine 33 on the cross 32 inside the sleeve 31 to rotate, the rotation of the turbine 33 is transmitted to the rotating shaft 41 through the connecting shaft 34, so that the rotating shaft 41 rotates in the connecting pipeline 1; the rotation of the rotating shaft 41 drives the fixed plate 432 outside the fixed frame 431 to rotate synchronously, and the cleaning brush plate 433 outside the fixed plate 432 rotates; the outside of the cleaning brush plate 433 is in close contact with the arc-shaped transparent sealing light transmission plate 23, and scratches and cleans the arc-shaped transparent sealing light transmission plate 23 during rotation; in this way, the device can drive the cleaning mechanism 4 by using the natural flow of the water flow, so that the cleaning brush plate 433 effectively cleans the arc-shaped transparent sealing light transmission plate 23, avoiding the attachment of water scale on the outer surface of the arc-shaped transparent sealing light transmission plate 23; the accumulation of water scale often affects the propagation and reflection of light, thereby reducing the precision of liquid level detection; the device can maintain the detection precision of the whole liquid level sensor for a long time through continuous cleaning, and ensures that the liquid level sensor can accurately detect the liquid level state in complex use environment at all times, providing reliable data support for the stable operation of the equipment.

Claims

1. An all-in-one pipe-type liquid level sensor comprising a connection pipe, characterized by: The middle part of the connecting pipeline is fixedly connected with a sensor mechanism on one side, one side of the connecting pipeline is fixedly installed with a driving mechanism, the side of the driving mechanism close to the sensor mechanism is fixedly installed with a cleaning mechanism, the cleaning mechanism is rotationally connected to the inside of the connecting pipeline, and the outside of the cleaning mechanism is connected with the inside of the connecting pipeline. The sensor mechanism comprises a transparent shell, the transparent shell is fixedly connected to one side of the outer surface of the middle part of the connecting pipeline, a groove is formed in the side of the transparent shell close to the connecting pipeline, an arc-shaped transparent sealing light transmission plate is fixedly connected in the inside of the groove, and a detection assembly is arranged in the inside of the transparent shell.

2. A monolithic, tubular liquid level sensor according to claim 1, characterized in that: The detection assembly comprises a light shield and an elastic clamping block, clamping grooves are formed in the bottom of the light shield on both sides, the elastic clamping block is fixedly connected to both ends of the inside and outside of the transparent shell, the elastic clamping block is clamped in the inside of the clamping groove, the light shield is clamped in the inside of the transparent shell through the elastic clamping block, clamping cylinders are arranged on both sides of the top of the light shield, a PCB board is clamped and installed on the light shield through the clamping cylinders, keys are fixedly connected to both sides of the top of the light shield, an inclined surface is arranged on the outside of the keys and is vertically arranged at an angle of 45 degrees close to the pipeline, a transmitting lamp bead and a receiving lamp bead are respectively arranged on the inside of the two keys, a three-stage tube is arranged on the PCB board, transparent bosses are arranged on both ends of the side of the inside of the transparent shell close to the connecting pipeline, the upper end of the transparent boss is arranged in the shape of an isosceles triangle, and the inclined surface of the transparent boss is parallel to the transmitting lamp bead and the receiving lamp bead.

3. A monolithic, tubular liquid level sensor according to claim 2, characterized in that: A wire is fixedly connected to the top of the PCB board, and an electric plug is fixedly connected to the outer end of the wire.

4. A monolithic, tubular liquid level sensor according to claim 1, characterized in that: The driving mechanism comprises a sleeve, the sleeve is fixedly connected to the input end of the connecting pipeline, a cross is fixedly connected to the inside of the sleeve close to the connecting pipeline, a turbine is rotationally connected to the side of the cross close to the sleeve, a connecting shaft is fixedly connected to the side of the turbine close to the connecting pipeline, and the end of the connecting shaft penetrates through the cross and the cleaning mechanism.

5. A monolithic tubular liquid level sensor according to claim 4, wherein: The cleaning mechanism comprises a rotating shaft, the rotating shaft is fixedly connected to the inside of the connecting shaft close to the connecting pipeline, a fixed shaft is fixedly installed in the middle of the rotating shaft, and cleaning groups are fixedly connected to the outside of the fixed shaft at equal intervals.

6. A monolithic tubular liquid level sensor according to claim 5, wherein: The cleaning group comprises a fixed frame, the fixed frame is fixedly connected to the outer surface of the fixed shaft in the shape of a ring at equal intervals, a fixed plate is fixedly installed on the outside of the fixed frame, a cleaning brush plate is fixedly connected to the outside of the fixed plate, and the cleaning brush plate is connected with the arc-shaped transparent sealing light transmission plate.

7. A monolithic tubular liquid level sensor according to claim 6, wherein: Both ends of the fixed shaft are arranged in the shape of a cone, and the outer surface of the transparent shell is arranged in the shape of a circular arc at the corners.

8. A monolithic, tubular liquid level sensor according to claim 4, characterized in that: A threaded interface is fixedly connected to the side of the sleeve away from the connecting pipeline, and a sealing gasket ring is fixedly connected to the inside of the threaded interface.

9. A monolithic tubular liquid level sensor according to claim 8, wherein: Anti-skid knobs are formed on the outside of the threaded interface at equal intervals, anti-skid grooves are formed on the outer surface of the anti-skid knobs at equal intervals, and a threaded interface is also fixedly connected to the end of the connecting pipeline away from the sleeve.

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