Non-contact photoelectric liquid level sensor

Abstract

The utility model relates to the field of photoelectric liquid level sensors, and particularly discloses a non-contact photoelectric liquid level sensor which comprises a water tank, a sensor assembly is arranged on the outer side of the water tank, the sensor assembly comprises an installation cylinder arranged on the outer side of the water tank, and a lens seat is arranged at the other end of the installation cylinder. And the lens holder and the interior of the mounting cylinder are mutually inserted. By the adoption of the structure, the pull rope moves outwards by pulling the pull head, the connecting rope is driven to move under the movement of the pull rope, and the two ends of the connecting rope are fixedly connected with the clamping blocks, so that the clamping blocks move towards the interior of the circular groove while the connecting rope is pulled; therefore, the sensor body can be disassembled and maintained only when the clamping block and the clamping groove are in contact and clamped connection, and the photoelectric liquid level sensor is designed in a combined mode, so that the sensor body can be disassembled flexibly when the photoelectric liquid level sensor is used. And therefore, the sensor is more convenient to use, and meanwhile, the dismounting efficiency of the sensor body is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photoelectric liquid level sensor field especially a kind of non-contact photoelectric liquid level sensor. BACKGROUND

[0002] With the development of science and technology, various products appear in people's life, for example, electronic products, children's toys, household supplies, lighting equipment and sensors, etc., which solve various problems encountered in people's life. As a product with wide application range in industry, the sensor is very popular among users. However, the existing non-contact photoelectric liquid level sensor on the market detects the height of the liquid level through the refraction and reflection of the prism.

[0003] According to the patent with the announcement number "CN213021828U", a photoelectric liquid level sensor is disclosed. The technical solution points are: including a water tank and a new photoelectric liquid level sensor installed at the bottom of the water tank, a conical lens is fixedly installed inside the shell, a fastening bolt is used to fixedly install the wire inside the shell, a waterproof film is arranged on the outside of the conical lens, an infrared light-emitting diode and a photosensitive receiver are fixedly arranged inside the shell, the infrared light-emitting diode and the photosensitive receiver are electrically connected with the wire, a conical sealing groove is formed at the position where the water tank is overlapped with the shell, a rubber sealing ring is fixedly arranged at the position of the conical sealing groove of the shell, and a buffer pad is fixedly arranged at the bottom of the conical sealing groove. The utility model solves the problem that when the water level is lower than the critical liquid level, water droplets will gather on the surface of the conical lens, which affects the accuracy of signal reception and reduces the sealing performance of the sensor and the water tank connection after long-term use.

[0004] Through the above structure, the conical sealing groove is formed at the position where the water tank is overlapped with the shell, and the rubber sealing ring is arranged at the position corresponding to the conical sealing groove. Arranging the rubber sealing ring inside the conical sealing groove is conducive to improving the sealing performance of the new photoelectric liquid level sensor. The buffer pad is arranged inside the conical sealing groove. After the rubber sealing ring is installed inside the conical sealing groove, the rubber sealing ring extrudes the buffer pad, which can reduce the gap between the rubber sealing ring and the conical sealing groove, further improve the sealing performance, and the conical lens, the photosensitive receiver and the infrared light-emitting diode of the existing photoelectric liquid level sensor are designed in one piece. However, this integrated design is very troublesome when the sensor needs to be maintained, and the sensor cannot be disassembled and maintained if there is water in the detected water tank, which reduces the practicability of the sensor. SUMMARY

[0005] The utility model aims at providing a non-contact photoelectric liquid level sensor to solve the problem of flexible disassembly in the background technology.

[0006] In order to achieve the above object, the utility model provides a kind of non-contact photoelectric liquid level sensor, including water tank, the outside of the water tank is provided with sensor assembly, the sensor assembly includes the installation cylinder being arranged at the outside of water tank, another end of the installation cylinder is provided with lens seat, the inside of lens seat and installation cylinder are mutually inserted, one end of the lens seat is fixedly connected with lens body, another end of the lens seat is equipped with installation slot, the installation slot is communicated with lens body, the both sides of installation slot are equipped with insertion slot, all the insertion slot is equipped with insertion block in the inside, one end of the insertion block is fixedly connected with sensor body, the sensor body and installation slot are mutually inserted, the both sides of insertion block are equipped with circular groove, the inside of circular groove is fixedly connected with spring, another end of the spring is fixedly connected with clamping block, the clamping block and clamping slot are mutually clamped, another end of the insertion block is equipped with notch, the inside of clamping block is fixedly connected with connecting rope, another end of the insertion block is fixedly connected with connecting column, another end of the connecting column is fixedly connected with cover plate, the cover plate covers installation slot and insertion slot, another end of the connecting rope is fixedly connected with pull rope, another end of the pull rope is fixedly connected with pull head with cover plate being penetrated,

[0007] In further embodiments, the outside of the water tank is equipped with mounting hole, the inside of the mounting hole is equipped with mounting internal thread, the outside of one end of the installation cylinder is equipped with mounting external thread, the mounting internal thread and mounting external thread are mutually screwed.

[0008] In further embodiments, the surface of the installation cylinder is fixedly connected with mounting disc, the surface of the mounting disc is equipped with mounting through hole, the inside of the mounting through hole is inserted with mounting screw, the outside of the water tank is equipped with mounting screw hole on the circumferential side of mounting hole, the mounting screw is mutually screwed with mounting through hole and mounting screw hole being penetrated.

[0009] In further embodiments, the outside of the water tank is equipped with external sealing groove on the circumferential side of mounting hole, the inside of the mounting disc is fixedly connected with external sealing block, the external sealing block and external sealing groove are mutually sealed and clamped.

[0010] In further embodiments, one end of the installation cylinder is fixedly connected with installation partition, the inside of the installation partition is equipped with internal sealing groove, the inside of the lens seat is fixedly connected with internal sealing block on the circumferential side of lens body, the internal sealing block and internal sealing groove are mutually sealed and inserted.

[0011] In further embodiments, the other end of the mounting cylinder is threadedly connected with the lens seat, and the outer side of the other end of the mounting cylinder is provided with lens external threads, and the outer end of the lens seat is fixedly connected with a lens internal threaded cylinder, and the lens internal threaded cylinder is threadedly connected with the lens external threads.

[0012] In further embodiments, the two sides of the sensor body are fixedly connected with sensor mounting edges, the surfaces of the sensor mounting edges are provided with sensor mounting openings, the plug blocks on one side of the sensor body are provided with sensor screw holes, the sensor mounting openings are inserted with sensor screws, and the sensor screws are threadedly connected with the sensor screw holes through the sensor mounting openings.

[0013] In further embodiments, the two sides of the cover plate are provided with sensor wire grooves, the inner sides of the sensor wire grooves are fixedly connected with extension clamping columns, the other ends of the extension clamping columns are fixedly connected with rubber clamping columns, and the rubber clamping columns form a clamping opening.

[0014] In further embodiments, the inner and outer sides of the lens body are fixedly connected with waterproof membranes, the waterproof membranes are provided as super-hydrophobic coatings, the waterproof membranes wrap the inner and outer sides of the lens body, the waterproof membranes have good corrosion resistance and can remain stable in various environments, prevent damage to the material caused by acid and alkali corrosion, the super-hydrophobic coatings have high mechanical, chemical and environmental stability, can withstand repeated friction, washing, acid and alkali corrosion, ultraviolet radiation and harsh temperature tests, and the waterproof membranes are also provided on the inner side of the lens body to avoid the situation that the lens body is fogged due to excessive temperature difference between the inside and outside of the optoelectronic liquid level sensor.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] Firstly, in the utility model, when it is necessary to disassemble and maintain the sensor body after the sensor body is installed, the pull rope moves outward by pulling the pull head, and the connecting rope is moved under the movement of the pull rope, the two ends of the connecting rope are fixedly connected with the clamping blocks, the clamping blocks move into the circular grooves when the connecting rope is pulled, and the sensor body can be disassembled and maintained only when the clamping blocks are in contact with the clamping grooves, the optoelectronic liquid level sensor is designed in a combined manner, the sensor body can be disassembled flexibly when in use, and the disassembly efficiency of the sensor body is improved.

[0017] Secondly, in this invention, a waterproof membrane is provided on both the inner and outer sides of the lens. This waterproof membrane is a superhydrophobic coating, which allows water droplets to slide off the surface quickly without leaving watermarks, thus achieving a good waterproof effect. This characteristic makes the superhydrophobic coating perform well in terms of moisture resistance and anti-icing. Because liquids and dirt do not easily adhere to the surface of the superhydrophobic coating, it has a strong self-cleaning ability. Dirt and dust on the surface of the object will slide off quickly with the gravity of the water droplets, removing dust and most dirt from the surface of the lens body without leaving watermarks, achieving a double self-cleaning effect. The superhydrophobic coating has good anti-corrosion performance and can remain stable in various environments, preventing damage to the material from acid and alkali corrosion. The superhydrophobic coating has high mechanical, chemical, and environmental stability and can withstand repeated friction, scouring, acid and alkali corrosion, ultraviolet radiation, and harsh temperatures. Furthermore, a waterproof membrane is also provided on the inner side of the lens body to prevent fogging inside the lens body caused by excessive temperature difference between the inside and outside of the photoelectric liquid level sensor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the mounting hole structure in this utility model;

[0020] Figure 3 This is a schematic diagram of the mounting cylinder in this utility model;

[0021] Figure 4 In this utility model Figure 3 A schematic diagram of the side view structure;

[0022] Figure 5 This is a schematic diagram of the lens holder in this utility model;

[0023] Figure 6 In this utility model Figure 5 A schematic diagram of the side view structure;

[0024] Figure 7 This is a schematic diagram of the insert block in this utility model;

[0025] Figure 8 In this utility model Figure 7 A side view structural diagram.

[0026] In the figure: 1, water tank; 2, sensor assembly; 3, mounting cylinder; 4, lens seat; 5, lens body; 6, mounting groove; 7, insertion groove; 8, insertion block; 9, sensor body; 10, round groove; 11, spring; 12, clamping block; 13, clamping groove; 14, notch; 15, connecting rope; 16, pull rope; 17, pull head; 18, connecting column; 19, cover plate; 20, mounting hole; 21, mounting internal thread; 22, mounting external thread; 23, mounting disc; 24, mounting through hole; 25, mounting screw; 26, mounting screw hole; 27, external sealing groove; 28, external sealing block; 29, mounting partition; 30, internal sealing block; 31, lens external thread; 32, lens internal thread cylinder; 33, sensor mounting edge; 34, sensor mounting port; 35, sensor screw hole; 36, sensor screw; 37, sensor wire groove; 38, extension clamping column; 39, rubber clamping column; 40, waterproof film. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Please refer to Figures 1-8The utility model discloses an embodiment of a kind of non-contact photoelectric liquid level sensor, including water tank 1, the outside of water tank 1 is provided with sensor assembly 2, sensor assembly 2 includes the installation cylinder 3 being arranged at the outside of water tank 1, the other end of installation cylinder 3 is provided with lens seat 4, lens seat 4 and the inside of installation cylinder 3 are mutually inserted, one end of lens seat 4 is fixedly connected with lens body 5, the other end of lens seat 4 is provided with installation groove 6, installation groove 6 is communicated with lens body 5, the both sides of installation groove 6 are provided with insertion slot 7, all the inside of insertion slot 7 is provided with clamping groove 13, the insertion of insertion slot 7 is provided with plug 8, one end of plug 8 is fixedly connected with sensor body 9, sensor body 9 and installation groove 6 are mutually inserted, the both sides of plug 8 are provided with round groove 10, the inside of round groove 10 is fixedly connected with spring 11, the other end of spring 11 is fixedly connected with clamping block 12, clamping block 12 and clamping groove 13 are mutually clamped, the other end of plug 8 is provided with notch 14, the inside of clamping block 12 is fixedly connected with connecting rope 15, the other end of plug 8 is fixedly connected with connecting column 18, the other end of connecting column 18 is fixedly connected with cover plate 19, cover plate 19 covers installation groove 6 with insertion slot 7, the other end of connecting rope 15 is fixedly connected with pull rope 16, the other end of pull rope 16 is fixedly connected with pull head 17 and penetrates cover plate 19, the both sides of lens body 5 are fixedly connected with waterproof membrane 40, waterproof membrane 40 is set to superhydrophobic coating, waterproof membrane 40 is wrapped in the both sides of lens body 5, waterproof membrane 40 is superhydrophobic coating, superhydrophobic coating can make water droplet on surface quickly slide, no water mark, to reach good waterproof effect, this characteristic makes superhydrophobic coating show excellent in moisture-proof, anti-icing etc., since superhydrophobic coating surface is not easy to attach liquid and dirt, thus have very strong self-cleaning ability, dirt and dust on object surface can quickly slide along with the gravity of water droplet, remove the dust and most of dirt on the surface of lens body 5, no water mark, reach double self-cleaning effect.

[0029] Please refer to Figures 2-4 The outside of water tank 1 is provided with mounting hole 20, the inside of mounting hole 20 is provided with mounting internal thread 21, the outside of one end of installation cylinder 3 is provided with mounting external thread 22, mounting internal thread 21 and mounting external thread 22 are mutually screwed;When installing photoelectric liquid level sensor, installation cylinder 3 and the mounting hole 20 of water tank 1 surface can be installed under the action of mounting internal thread 21 and mounting external thread 22 first.

[0030] Please refer to Figures 2-4The surface of the mounting cylinder 3 is fixedly connected with a mounting disc 23, the surface of the mounting disc 23 is provided with a mounting through hole 24, the inside of the mounting through hole 24 is inserted with a mounting screw 25, the outside of the water tank 1 is provided with a mounting screw hole 26 at the circumferential side of the mounting hole 20, and the mounting screw 25 is threadedly connected with the mounting screw hole 26 in a penetrating mode.

[0031] Please refer to Figure 2 and Figure 3 The outside of the water tank 1 is provided with an external sealing groove 27 at the circumferential side of the mounting hole 20, the inside of the mounting disc 23 is fixedly connected with an external sealing block 28, and the external sealing block 28 is sealingly connected with the external sealing groove 27. After the mounting cylinder 3 and the mounting hole 20 are mounted, the external sealing block 28 and the external sealing block 28 are in a mutually inserted state, so that the interface can be effectively sealed during use, avoiding the leakage of water through the mounting hole 20.

[0032] Please refer to Figure 3 and Figure 6 One end of the mounting cylinder 3 is fixedly connected with a mounting partition plate 29, the inside of the mounting partition plate 29 is provided with an internal sealing groove, the inner end of the lens seat 4 is fixedly connected with an internal sealing block 30 at the circumferential side of the lens body 5, and the internal sealing block 30 is sealingly connected with the internal sealing groove in a penetrating mode. The internal sealing block 30 and the internal sealing groove can prevent water leakage at the connection between the mounting cylinder 3 and the lens seat 4 during installation of the lens body 5.

[0033] Please refer to Figure 3 , Figure 4 and Figure 6 The other end of the mounting cylinder 3 is threadedly connected with the lens seat 4, the other end of the mounting cylinder 3 is provided with a lens external thread 31, and the outer end of the lens seat 4 is fixedly connected with a lens internal thread cylinder 32. The lens internal thread cylinder 32 is threadedly connected with the lens external thread 31 in a penetrating mode. The lens seat 4 is inserted into the mounting cylinder 3, and then the lens internal thread cylinder 32 is rotated to align with the lens external thread 31 on the outside of the mounting cylinder 3, so that the lens seat 4 and the lens body 5 can be installed.

[0034] Please refer to Figure 8Both sides of the sensor body 9 are fixedly connected with sensor mounting edges 33, the surfaces of the sensor mounting edges 33 are provided with sensor mounting openings 34, the side of the plug block 8 located on the sensor body 9 is provided with a sensor screw hole 35, the inside of the sensor mounting opening 34 is inserted with a sensor screw 36, the sensor screw 36 penetrates through the sensor mounting opening 34 and is threadedly connected with the sensor screw hole 35; first, the sensor body 9 is placed on one side of the plug block 8, the sensor screw 36 is threadedly connected with the sensor screw hole 35 through the sensor mounting opening 34, so that the installation effect of the sensor body 9 and the plug block 8 can be realized.

[0035] Please refer to Figure 8 Both sides of the cover plate 19 are provided with sensor wire grooves 37, the inner sides of the sensor wire grooves 37 are fixedly connected with extension clamping columns 38, the other ends of the extension clamping columns 38 are fixedly connected with rubber clamping columns 39, and the rubber clamping columns 39 form clamping interfaces; then the wires of the sensor body 9 are inserted into the inside of the sensor wire groove 37 through the clamping interfaces, so that the limiting effect of the sensor wires can be realized.

[0036] The working principle of the utility model is: when installing, first can install the installation hole 20 of installation cylinder 3 and the surface of water tank 1 under the action of installation internal thread 21 and installation external thread 22, and after the installation of installation cylinder 3 and installation hole 20 is completed, the external sealing block 28 and the external sealing block 28 are in the state of mutual insertion, so that the interface can be effectively sealed during use, avoiding the leakage of water through the installation hole 20, by inserting the lens seat 4 into the inside of installation cylinder 3, then by rotating the lens internal thread cylinder 32 to align the lens external thread 31 outside installation cylinder 3, the lens seat 4 and the lens body 5 can be installed, and by setting the internal sealing block 30 and the internal sealing groove, the connection between installation cylinder 3 and lens seat 4 can be avoided during the installation of the lens body 5, finally by inserting the plug 8 into the inside of the slot 7, after the plug 8 and the slot 7 are inserted into the appropriate position, the position of the round groove 10 and the clamping groove 13 is consistent, at this time the clamping block 12 will pop out the round groove 10 under the action of the spring 11 to make the clamping groove 13 clamped, and after clamping, the installation effect of the sensor can be achieved, and when the sensor body 9 needs to be disassembled and maintained during use, by pulling the puller 17, the pull rope 16 moves outward, and under the movement of the pull rope 16, the connecting rope 15 is moved, and the two ends of the connecting rope 15 are fixedly connected with the clamping block 12, so that the clamping block 12 moves to the inside of the round groove 10 while the connecting rope 15 is pulled, so that the clamping block 12 and the clamping groove 13 are in contact and clamped, and then the sensor body 9 can be disassembled and maintained, and the combined design of the photoelectric liquid level sensor makes the sensor body 9 flexible during use, and then the installation is completed, and the normal use effect can be achieved, the photoelectric liquid level sensor body 9 contains a near-infrared light emitting diode and a photosensitive receiver, when the sensor body 9 is in the air, the light emitted by the LED will be directly reflected back to the photosensitive receiver under the action of the lens body 5, and when the lens body 5 of the sensor assembly 2 is immersed in the liquid, the light will be reflected or refracted at the interface of the liquid and the air, thereby changing the light path to the photosensitive receiver, so that the liquid level can be detected, and the inner and outer sides of the lens are provided with waterproof membranes 40, and the waterproof membranes 40 are super-hydrophobic coatings, which can make water droplets slide off the surface quickly without leaving water marks, thereby achieving good waterproof effect, this feature makes the super-hydrophobic coating excellent in moisture-proof and anti-icing, and since the super-hydrophobic coating surface is not easy to attach liquid and dirt, it has strong self-cleaning ability, the dirt and dust on the surface of the object will slide off quickly under the gravity of the water droplets, removing the dust and most of the dirt on the surface of the lens body 5 without leaving water marks, achieving double self-cleaning effect, the super-hydrophobic coating has good corrosion resistance, can maintain stability in various environments, prevent acid and alkali corrosion from damaging the material, the super-hydrophobic coating has high mechanical, chemical and environmental stability,Can withstand repeated friction, scour, acid and alkali corrosion, UV radiation and harsh temperature test, and also set up waterproof film 40 in the inside of lens body 5 make can avoid photoelectric liquid level sensor inside and outside temperature difference too big cause lens body 5 inside fog situation, avoid lens body 5 surface material too much or lens body 5 inside fog causes can't form light refraction cause can't reach effective detection situation.

Claims

1. A non-contact photoelectric liquid level sensor, characterized by, The utility model provides a water tank, the utility model discloses a sensor assembly is provided to the outside of water tank, and the sensor assembly includes the installation cylinder that sets up to the outside of water tank, the other end of installation cylinder is provided with lens seat, and the inside of installation cylinder is mutually inserted with lens seat, one end of lens seat is fixedly connected with lens body, the other end of lens seat is provided with installation slot, and installation slot is communicated with lens body, both sides of installation slot are provided with insertion slot, and the inside of insertion slot is provided with the clamping groove, and the inside of insertion slot is inserted with the plug, one end of plug is fixedly connected with sensor body, and sensor body is mutually inserted with installation slot, both sides of plug are provided with round groove, and the inside of round groove is fixedly connected with spring, and the other end of spring is fixedly connected with the clamping block, and the clamping block is mutually clamped with the clamping groove, and the other end of plug is provided with the notch, and the inside of clamping block is fixedly connected with the connecting rope, and the other end of plug is fixedly connected with the connecting column, and the other end of connecting column is fixedly connected with the cover plate, and the cover plate covers installation slot and insertion slot, and the other end of connecting rope is fixedly connected with the pull rope, and the other end of pull rope is fixedly connected with the pull head through cover plate.

2. A non-contact photoelectric liquid level sensor according to claim 1, wherein, The outside of the water tank is provided with a mounting hole, and the inside of the mounting hole is provided with a mounting internal thread.

3. A non-contact photoelectric liquid level sensor according to claim 1, wherein, The surface of the installation cylinder is fixedly connected with an installation disc, the surface of the installation disc is provided with an installation through hole, and the inside of the installation through hole is inserted with an installation screw.

4. A non-contact photoelectric liquid level sensor according to claim 3, wherein, The outside of the water tank is provided with an external sealing groove on the periphery of the mounting hole, and the inside of the installation disc is fixedly connected with an external sealing block.

5. A non-contact photoelectric liquid level sensor according to claim 1, wherein, The other end of the installation cylinder is threadedly connected with the lens seat, the other end of the installation cylinder is provided with a lens external thread on the outside, the outer end of the lens seat is fixedly connected with a lens internal thread cylinder, and the lens internal thread cylinder is threadedly connected with the lens external thread.

6. A non-contact photoelectric liquid level sensor according to claim 1, wherein, Both sides of the sensor body are fixedly connected with a sensor installation edge, the surface of the sensor installation edge is provided with a sensor installation port, the plug on one side of the sensor body is provided with a sensor screw hole, the inside of the sensor installation port is inserted with a sensor screw, and the sensor screw is threadedly connected with the sensor screw hole through the sensor installation port.

7. A non-contact photoelectric liquid level sensor according to claim 1, wherein, Both sides of the cover plate are provided with a sensor wire slot, the inside of the sensor wire slot is fixedly connected with an extension clamping column, the other end of the extension clamping column is fixedly connected with a rubber clamping column, and the rubber clamping columns form a clamping port.

8. The non-contact photoelectric liquid level sensor of claim 1, wherein, ​ 9. The non-contact photoelectric liquid level sensor of claim 1, wherein, The inner and outer sides of the lens body are fixedly connected with waterproof membranes, the waterproof membranes are set as super-hydrophobic coatings, and the waterproof membranes wrap the inner and outer sides of the lens body.

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