CN113790778A

CN113790778A - Photoelectric liquid level sensor

Info

Publication number: CN113790778A
Application number: CN202110915751.6A
Authority: CN
Inventors: 宫晓钰; 孙辉东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2021-12-14

Abstract

The invention discloses a photoelectric liquid level sensor which comprises a shell, wherein a signal wire is fixedly connected to the outer surface of the upper end of the shell, a lens is fixedly connected to the outer surface of the lower end of the shell, a light-emitting diode is fixedly connected to one side inside the lens, a receiver is fixedly connected to the position, close to the light-emitting diode, inside the lens, the outer surfaces of the upper ends of the light-emitting diode and the receiver are fixedly connected with the shell, a horn cover is fixedly connected to the position, close to the lens, of the outer surface of the lower end of the shell, and a plurality of connecting rods are connected to the outer surface of the lower end of the horn cover in an annular rotating mode. According to the invention, the fan-shaped plate is used for closing the lower end of the horn cover when the connecting rod, the replacing mechanism and the buoyancy block are not in the liquid, and the fan-shaped plate can effectively prevent water vapor and water vapor from entering the horn cover from the lower port of the horn cover, so that the problem that the water vapor and the water vapor are attached to the outer surface of the lens to influence the work of the light-emitting diode and the receiver is solved.

Description

Photoelectric liquid level sensor

Technical Field

The invention relates to the technical field of liquid level sensors, in particular to a photoelectric liquid level sensor.

Background

The photoelectric liquid level sensor is mainly used in equipment requiring liquid level detection, and has the working principle that a product internally comprises a near infrared light emitting diode and a photosensitive receiver, light emitted by the light emitting diode is guided into a lens at the top of the sensor, and when the liquid submerges the lens of the photoelectric liquid level switch, the light is refracted into the liquid, so that the receiver cannot receive or can only receive a small amount of light, the photoelectric liquid level sensor can drive an internal electric switch by sensing the change of the condition, so that an external alarm or control circuit is started, and if no liquid exists, the light emitted by the light emitting diode is directly reflected back to the receiver from the lens.

The invention discloses a photoelectric liquid level sensor, and the patent application number is CN202011250013.6, and the invention relates to a photoelectric liquid level sensor, which comprises a shell, a photoelectric receiver, a control circuit and at least one group of light guide assembly, wherein the light guide assembly comprises a photoelectric emitter, a first light guide column, a second light guide column and a first reflecting surface; the control circuit controls the photoelectric transmitter to transmit the signal light and detects whether the photoelectric receiver receives the signal light; the first light guide column guides the signal light emitted by the photoelectric emitter to the first reflecting surface; the first reflecting surface reflects the light guided out by the first light guide column to the second light guide column.

The light that above-mentioned contrast patent took place for detecting remote liquid meets emitting diode is scattered, the problem that the light that is received by the receiver influences sensor sensitivity at last is few is solved, above-mentioned contrast patent is through setting up the leaded light post in the sensor and is solved the above-mentioned problem, but photoelectric liquid level sensor receives steam when being nearer apart from the liquid level that will detect easily, there is the drop on steam etc. leads to the probe of sensor, the drop that leads to emitting diode to send takes place the scattering by the attached to on the probe, make the receiver can not accept the light that the diode sent or receive the light that the diode sent less, thereby lead to the touch sensor erroneous judgement, cause the testing result inaccurate, still meet the liquid level and produce undulant messenger's liquid and touch the probe, lead to the surface of probe to have the drop, make the touch sensor produce the problem of erroneous judgement.

For this purpose, an optoelectronic fill level sensor is proposed.

Disclosure of Invention

The present invention is directed to a photoelectric liquid level sensor, which solves the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a photoelectric liquid level sensor, includes the casing, the upper end surface fixedly connected with signal line of casing, the lower extreme surface fixedly connected with lens of casing, the inside one side fixedly connected with emitting diode of lens, the inside fixed position that is close to emitting diode of lens is connected with the receiver, the upper end surface of emitting diode and receiver all with casing fixed connection, the lower extreme surface of casing is close to the fixed position of lens and is connected with loudspeaker cover, loudspeaker cover's lower extreme surface is the annular and rotates and be connected with a plurality of connecting rods, the one end fixedly connected with of connecting rod changes the mechanism, the inside fixed mounting who changes the mechanism has the buoyancy piece, the other end fixedly connected with sector plate of connecting rod, change mechanism, buoyancy piece three's gravity is greater than the gravity of sector plate, and connecting rod, change mechanism, The buoyancy of the buoyancy block three in water is larger than that of the sector plate in water, the connecting rod, the replacing mechanism and the buoyancy block three can drive the sector plate to close the lower port of the horn cover when liquid does not contact the sensor, and the connecting rod, the replacing mechanism and the buoyancy block three can drive the sector plate to open the lower port of the horn cover when the liquid overflows the touch sensor.

When the photoelectric liquid level sensor is close to the liquid level to be detected, water vapor and the like are easily received to cause water drops on a probe of the sensor, so that light emitted by a light-emitting diode is scattered by the water drops attached to the probe, the light emitted by the diode cannot be received by a receiver or the light emitted by the diode is less received, the misjudgment of a touch sensor is caused, the detection result is inaccurate, and when the liquid level fluctuates to cause the liquid to touch the probe, the water drops are formed on the surface of the probe, so that the misjudgment of the touch sensor is caused. When the photoelectric liquid level sensor is not in contact with the liquid, a plurality of groups of fan-shaped plates and the horn cover form a closed space for the lens, the fan-shaped plates can effectively block water vapor and vapor from entering the horn cover from the lower port of the horn cover, and the problem that the water vapor and the vapor are attached to the outer surface of the lens to influence the work of a light emitting diode and a receiver is avoided, in addition, when liquid fluctuates, the fan-shaped plate can also effectively prevent the fluctuant liquid from entering the horn cover, so that the problem of wrong judgment of the photoelectric liquid level sensor caused by the fact that the fluctuant liquid contacts the lens is avoided.

Preferably, one side of the outer surface of the upper end of the sector plate is fixedly connected with a dismounting mechanism, the upper end of the dismounting mechanism is connected with a sector cover in a clamping manner, and bristles are fixedly arranged on the outer surface of one side of the sector cover.

In the invention, in order to improve the neatness of the surface of the lens and further improve the sensitivity of the photoelectric liquid level sensor, the bristles on the fan-shaped cover can be driven to clean the lens to ensure the neatness of the surface of the lens by utilizing the rotation of the fan-shaped plate every time, so that the sensitivity of the photoelectric liquid level sensor is improved.

Preferably, the dismounting mechanism comprises an elastic sheet, an arc-shaped groove, an insertion rod and an arc-shaped convex block; the upper end surface one side fixed connection shell fragment of sector plate, the inner wall both sides central point of shell fragment puts and has all seted up the arc recess, the inside block of arc recess is connected with the arc lug, one side outer fixed surface of arc lug is connected with the inserted bar, the upper end surface and the fan-shaped cover fixed connection of inserted bar, the upper end on shell fragment ground adopts the arc design, and the lower extreme of inserted bar also adopts the arc design, and the inserted bar of being convenient for inserts in the shell fragment.

When the brush is in use, the brush hair is worn to cause that the lens is not cleaned completely or the tested liquid has certain corrosivity and needs to be replaced in time.

Preferably, the horn cover is made of opaque materials.

When the photoelectric liquid level sensor works, the photoelectric liquid level sensor is arranged under the condition of strong light, and the sensitivity of the liquid level sensor is influenced due to the fact that the receiver receives less light rays emitted by the diode under the influence of the strong light.

Preferably, the inner wall of the pull horn cover is fixedly connected with an annular plate close to the lower end.

In addition, when the photoelectric liquid level sensor is not contacted with liquid, the annular plate plays a fixing role on the fan-shaped plate, and the problems that the lower port of the horn cover is opened by the water vapor and the water vapor enters the horn cover from the opening to influence the sensitivity of the sensor are prevented.

Preferably, the replacing mechanism comprises a first transverse plate, a first fixing plate, a third fixing plate, a second transverse plate, a second fixing plate and a spring; the utility model discloses a connecting rod, including connecting rod, first diaphragm, the inside sliding connection of one end of connecting rod has first diaphragm, the both ends of first diaphragm all extend to the outside of connecting rod, the first fixed plate of one side fixedly connected with of first diaphragm, the inside position sliding connection who is close to first diaphragm of connecting rod has the second diaphragm, the both ends of second diaphragm all extend to the outside of connecting rod, the one end fixedly connected with second fixed plate of second diaphragm, lower surface one side fixedly connected with spring of second diaphragm, the one end of spring and lower surface one side fixed connection of first diaphragm.

When the photoelectric liquid level sensor detects different liquids, because the densities of the different liquids are different, the buoyancy of the object connecting rod, the replacing mechanism and the buoyancy block in the different liquids are different, and in order to ensure that the buoyancy of the connecting rod, the replacing mechanism and the buoyancy block in the different liquids is larger than that of the sector plate and the sector cover, the total buoyancy of the connecting rod, the replacing mechanism and the buoyancy block is improved by replacing the buoyancy block with different densities, an operator pulls the first fixing plate and the second fixing plate to pull the first fixing plate and the second fixing plate in a back direction, drives the first transverse plate and the second transverse plate to slide in a reverse direction, then the first fixing plate, the second fixing plate and the third fixing plate are not clamped on the buoyancy block any more, at the moment, the buoyancy block with different densities can be taken down to replace the buoyancy block with different densities, then the first fixing plate and the second fixing plate are loosened, and because the contraction of the spring pulls the first fixing plate and the second fixing plate (the spring is pulled when the first fixing plate and the second fixing plate are pulled) The third fixing plate is matched to clamp the replaced buoyancy block, so that the buoyancy block is replaced quickly, the photoelectric liquid level sensor can adapt to different liquids, and the practicability of the sensor is greatly improved.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention closes the lower end of the horn cover by the fan-shaped plate when the connecting rod, the replacing mechanism and the buoyancy block are not in the liquid, the fan-shaped plate can effectively prevent water vapor and water vapor from entering the horn cover from the lower end opening of the horn cover, the problem that the water vapor and the water vapor are attached to the outer surface of the lens to influence the work of the light emitting diode and the receiver is avoided, in addition, when the liquid fluctuates, the fan-shaped plate can also effectively prevent the fluctuating liquid from entering the horn cover, and the problem that the photoelectric liquid level sensor judges wrongly because the fluctuating liquid contacts the lens is avoided.

2. The invention realizes the shading of the probe of the photoelectric liquid level sensor by adopting the opaque material to manufacture the horn cover, thereby avoiding the problem that the sensitivity of the photoelectric liquid level sensor is influenced by strong light irradiation, in addition, the annular plate is arranged at the lower end position of the inner wall of the horn cover, so that the annular plate plays a role of blocking gaps at the connecting part of the horn cover and the connecting rod, thereby avoiding the problem that the sensitivity of the sensor is influenced by water vapor and water vapor entering the horn cover from the connecting part, when the photoelectric liquid level sensor is not contacted with liquid, the annular plate plays a role of fixing the sector plate, and the problems that the lower port of the horn cover is opened by water vapor and the water vapor enters the horn cover from the opening part to influence the sensitivity of the sensor due to the fact that the sector plate rotates too far towards the horn cover are prevented.

Drawings

FIG. 1 is a perspective view of a photoelectric liquid level sensor of the present invention;

FIG. 2 is a partial cross-sectional view of the electro-optical liquid level sensor of the present invention;

FIG. 3 is a bottom view of the electro-optical liquid level sensor of the present invention;

FIG. 4 is a perspective view of the combination of components of the link, sector plate, change mechanism, etc. of the present invention;

FIG. 5 is a half-sectional view of the horn cover of the present invention;

FIG. 6 is a partial perspective view of the structure changing mechanism of the present invention;

fig. 7 is a cross-sectional view of the detachment mechanism of the present invention.

In the figure: 1. a housing; 2. a signal line; 3. a connecting rod; 4. a horn cover; 5. a mechanism is replaced; 51. a first transverse plate; 52. a first fixing plate; 53. a third fixing plate; 54. a second transverse plate; 55. a second fixing plate; 56. a spring; 6. a buoyancy block; 7. a sector plate; 8. an annular plate; 9. a fan-shaped cover; 10. brushing; 11. a receiver; 12. a light emitting diode; 13. a lens; 14. a disassembly mechanism; 141. a spring plate; 142. an arc-shaped groove; 143. inserting a rod; 144. an arc-shaped bump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, the present invention provides a photoelectric liquid level sensor, which comprises:

a photoelectric liquid level sensor is disclosed, as shown in figures 1 to 4, and comprises a shell 1, wherein the upper end outer surface of the shell 1 is fixedly connected with a signal line 2, the lower end outer surface of the shell 1 is fixedly connected with a lens 13, one side inside the lens 13 is fixedly connected with a light emitting diode 12, the position inside the lens 13, which is close to the light emitting diode 12, is fixedly connected with a receiver 11, the upper end outer surfaces of the light emitting diode 12 and the receiver 11 are fixedly connected with the shell 1, the position outside the lower end outer surface of the shell 1, which is close to the lens 13, is fixedly connected with a horn cover 4, the lower end outer surface of the horn cover 4 is in annular rotation connection with a plurality of connecting rods 3, one end of each connecting rod 3 is fixedly connected with a replacing mechanism 5, the inside of the replacing mechanism 5 is fixedly installed with a buoyancy block 6, and the other end of each connecting rod 3 is fixedly connected with a sector plate 7, the gravity of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 is larger than the gravity of the sector plate 7, the buoyancy of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 in water is larger than the buoyancy of the sector plate 7 in water, the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 can drive the sector plate 7 to close the lower port of the horn cover 4 when liquid does not contact the sensor, and the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 can drive the sector plate 7 to open the lower port of the horn cover 4 when the liquid overflows the sensor.

When the photoelectric liquid level sensor is close to the liquid level to be detected, water vapor and the like are easily received to cause water drops on a probe of the sensor, so that light emitted by a light emitting diode 12 is scattered by the water drops attached to the probe, the light emitted by the diode cannot be received by a receiver 11 or the light emitted by the diode is less received, the misjudgment of a touch sensor is caused, the detection result is inaccurate, and when the liquid level fluctuates to cause the liquid to touch the probe, the water drops are formed on the surface of the probe, and the misjudgment of the touch sensor is caused, the invention has the problems that when the liquid overflows the photoelectric liquid level sensor, because the buoyancy of a connecting rod 3, a replacing mechanism 5 and a buoyancy block 6 is larger than the gravity of a sector plate 7 and a sector cover 9, the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 float together and rotate at the connecting position of the connecting rod 3 and the horn cover 4, the sector plate 7 rotates outwards from a lower port of the horn cover 4, when the liquid is lower than the photoelectric liquid level sensor, because the gravity of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 is greater than the gravity of the sector plate 7 and the sector cover 9, the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 rotate downwards at the joint of the connecting rod 3 and the horn cover 4, so as to drive the sector plate 7 to rotate towards the lower port of the horn cover 4 and finally close the lower port of the horn cover 4, when the photoelectric liquid level sensor is not in contact with the liquid, a plurality of groups of sector plates 7 and the horn cover 4 form a closed space for the lens 13, the sector plates 7 can effectively block water vapor and steam from entering the lower port of the horn cover 4 into the horn cover 4 from the lower port of the horn cover 4, and the water vapor and the steam are prevented from being attached to the outer surface of the lens 13, the work of the light emitting diode 12 and the receiver 11 is influenced, and in addition, when the liquid fluctuates, the fan-shaped plate 7 can also effectively prevent the fluctuant liquid from entering the horn cover 4, so that the problem that the judgment of the photoelectric liquid level sensor is wrong because the fluctuant liquid contacts the lens 13 is avoided.

As shown in fig. 2 and 4, in an embodiment of the photoelectric liquid level sensor of the present invention, a detaching mechanism 14 is fixedly connected to one side of an outer surface of an upper end of the sector plate 7, a sector cover 9 is connected to an upper end of the detaching mechanism 14 in a snap-fit manner, and bristles 10 are fixedly attached to one side of an outer surface of the sector cover 9.

In order to improve the surface cleanliness of the lens 13 and improve the sensitivity of the photoelectric liquid level sensor during working, the invention can drive the brush hairs 10 on the fan-shaped cover 9 to clean the lens 13 to ensure the surface cleanliness of the lens 13 by utilizing the fan-shaped plate 7 to rotate each time, thereby improving the sensitivity of the photoelectric liquid level sensor, and in addition, a plurality of groups of fan-shaped covers 9 are combined to form a package for the lens 13, thereby avoiding water vapor and vapor from entering the horn cover 4 through a gap at the joint of the connecting rod 3 and the horn cover 4, and simultaneously further ensuring that the surface of the lens 13 is not adhered by liquid.

As an embodiment of the optoelectronic liquid level sensor of the present invention, as shown in fig. 7, the detaching mechanism 14 includes a spring 141, an arc-shaped groove 142, an inserting rod 143, and an arc-shaped protrusion 144; the upper end outer surface one side fixed connection shell fragment 141 of sector plate 7, arc recess 142 has all been seted up to the inner wall both sides central point of shell fragment 141, the inside block of arc recess 142 is connected with arc lug 144, one side outer surface fixed connection of arc lug 144 has inserted bar 143, the upper end surface and the fan-shaped cover 9 fixed connection of inserted bar 143, the upper end on shell fragment 141 ground adopts the arc design, and the lower extreme of inserted bar 143 also adopts the arc design, and the inserted bar 143 of being convenient for inserts in the shell fragment 141.

When the brush bristles 10 are used for a period of time, the brush bristles 10 are worn to cause that the lens 13 is not cleaned completely or the tested liquid has certain corrosivity and the brush bristles 10 need to be replaced in time, and the inserting rod 143 can be separated from the elastic sheet 141 by pressing the sector plate 7 and pulling the sector cover 9 upwards by an operator, so that the sector plate 7 and the brush bristles 10 can be replaced together.

As an embodiment of the photoelectric liquid level sensor of the present invention, as shown in fig. 1, the horn cover 4 is made of a light-proof material.

When the photoelectric liquid level sensor works, the photoelectric liquid level sensor is arranged under the condition of strong light, and the sensitivity of the liquid level sensor is influenced because the receiver 11 receives less light rays emitted by the diode due to the influence of the strong light.

As an embodiment of the photoelectric liquid level sensor, as shown in FIG. 5, an annular plate 8 is fixedly connected to the inner wall of the horn cover 4 near the lower end.

In addition, when the photoelectric liquid level sensor is not contacted with liquid, the annular plate 8 plays a fixed role on the sector plate 7, and the problem that the lower port of the horn cover 4 is opened by the fact that the sector plate 7 rotates too far into the horn cover 4 to cause that the water vapor enters the horn cover 4 from the opening to influence the sensitivity of the sensor is avoided.

As shown in fig. 6, the replacement mechanism 5 includes a first horizontal plate 51, a first fixing plate 52, a third fixing plate 53, a second horizontal plate 54, a second fixing plate 55, and a spring 56; the outer fixed surface of one end of connecting rod 3 is connected with third fixed plate 53, the inside sliding connection of one end of connecting rod 3 has first diaphragm 51, the both ends of first diaphragm 51 all extend to the outside of connecting rod 3, the first fixed plate 52 of one side fixedly connected with of first diaphragm 51, the inside position sliding connection who is close to first diaphragm 51 of connecting rod 3 has second diaphragm 54, the both ends of second diaphragm 54 all extend to the outside of connecting rod 3, the one end fixedly connected with second fixed plate 55 of second diaphragm 54, lower surface one side fixedly connected with spring 56 of second diaphragm 54, the one end of spring 56 and the lower surface one side fixed connection of first diaphragm 51.

When the photoelectric liquid level sensor detects different liquids, because the densities of the different liquids are different, the buoyancy of the object connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 in the different liquids are different, and in order to ensure that the buoyancy of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 in the different liquids is larger than that of the sector plate 7 and the sector cover 9, the total buoyancy of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 is improved by replacing the buoyancy block 6 with different densities, an operator pulls the first fixing plate 52 and the second fixing plate 55 to pull the first fixing plate 52 and the second fixing plate 55 in a back direction, drives the first transverse plate 51 and the second transverse plate 54 to slide in opposite directions, but the first fixing plate 52, the second fixing plate 55 and the third fixing plate 53 do not clamp the buoyancy block 6 any more, at the moment, the buoyancy block 6 with different densities can be taken down to replace the buoyancy block 6, and then the first fixing plate 52 and the second fixing plate 55 are loosened, because the contraction of the spring 56 pulls the first fixing plate 52 and the second fixing plate 55 to cooperate with the third fixing plate 53 to clamp the replaced buoyancy block 6 (the spring 56 is stretched when the first fixing plate 52 and the second fixing plate 55 are pulled), the quick replacement of the buoyancy block 6 is realized, the photoelectric liquid level sensor can adapt to different liquids, and the practicability of the sensor is greatly improved.

The using method comprises the following steps: when liquid flows over the photoelectric liquid level sensor, because the buoyancy of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 is larger than the gravity of the sector plate 7 and the sector cover 9, the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 float upwards together and rotate at the joint of the connecting rod 3 and the horn cover 4, the sector plate 7 rotates outwards from the lower port of the horn cover 4, so that the liquid at the port of the horn cover 4 is opened and enters the horn cover 4 to enable the lens 13 to be contacted with the liquid, then the sensor detects the actual liquid level position, when the liquid is lower than the photoelectric liquid level sensor, because the gravity of the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 is larger than the gravity of the sector plate 7 and the sector cover 9, the connecting rod 3, the replacing mechanism 5 and the buoyancy block 6 rotate downwards at the joint of the connecting rod 3 and the horn cover 4, the sector plate 7 is driven to rotate towards the lower port of the horn cover 4, and finally the lower port of the horn cover 4 is closed, when the photoelectric liquid level sensor is not in contact with liquid, a plurality of groups of fan-shaped plates 7 and the horn cover 4 form a closed space for the lens 13, the fan-shaped plates 7 can effectively prevent water vapor and water vapor from entering the horn cover 4 from the lower port of the horn cover 4, the problem that the water vapor and the water vapor are attached to the outer surface of the lens 13 to influence the work of the light-emitting diode 12 and the receiver 11 is avoided, in addition, when the liquid fluctuates, the fan-shaped plates 7 can also effectively prevent the fluctuating liquid from entering the horn cover 4, and therefore the problem that the photoelectric liquid level sensor judges wrongly because the fluctuating liquid contacts the lens 13 is avoided.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An optoelectronic level sensor comprising a housing (1), characterized in that: the outer surface of the upper end of the shell (1) is fixedly connected with a signal line (2), the outer surface of the lower end of the shell (1) is fixedly connected with a lens (13), one side of the inside of the lens (13) is fixedly connected with a light-emitting diode (12), the inside of the lens (13) is close to a position fixedly connected with a receiver (11) of the light-emitting diode (12), the outer surfaces of the upper ends of the light-emitting diode (12) and the receiver (11) are fixedly connected with the shell (1), the outer surface of the lower end of the shell (1) is close to a position fixedly connected with a horn cover (4) of the lens (13), the outer surface of the lower end of the horn cover (4) is in annular rotation connection with a plurality of connecting rods (3), one end of each connecting rod (3) is fixedly connected with a replacing mechanism (5), the inside of the replacing mechanism (5) is fixedly installed with a buoyancy block (6), and the other end of each connecting rod (3) is fixedly connected with a sector plate (7), the device is characterized in that the gravity of the connecting rod (3), the replacing mechanism (5) and the buoyancy block (6) is larger than the gravity of the sector plate (7), the buoyancy of the connecting rod (3), the replacing mechanism (5) and the buoyancy block (6) in water is larger than the buoyancy of the sector plate (7) in water, when liquid does not contact with a sensor, the connecting rod (3), the replacing mechanism (5) and the buoyancy block (6) can drive the sector plate (7) to close the lower port of the horn cover (4), and when the liquid overflows the touch sensor, the connecting rod (3), the replacing mechanism (5) and the buoyancy block (6) can drive the sector plate (7) to open the lower port of the horn cover (4).

2. An optoelectronic fluid level sensor as claimed in claim 1, wherein: the upper end surface of the fan-shaped plate (7) is fixedly connected with a dismounting mechanism (14), the upper end of the dismounting mechanism (14) is clamped and connected with a fan-shaped cover (9), and the outer surface of one side of the fan-shaped cover (9) is fixedly provided with bristles (10).

3. An optoelectronic fluid level sensor as claimed in claim 2, wherein: the dismounting mechanism (14) comprises an elastic sheet (141), an arc-shaped groove (142), an inserting rod (143) and an arc-shaped convex block (144); the utility model discloses a fan-shaped board, including sector plate (7), inner wall both sides central point of shell fragment (141) puts and has all seted up arc recess (142), the inside block of arc recess (142) is connected with arc lug (144), one side outer fixed surface of arc lug (144) is connected with inserted bar (143), the upper end surface and fan-shaped cover (9) fixed connection of inserted bar (143), the upper end on shell fragment (141) ground adopts the arc design, and the lower extreme of inserted bar (143) also adopts the arc design, and the inserted bar (143) of being convenient for inserts in shell fragment (141).

4. An optoelectronic fluid level sensor as claimed in claim 1, wherein: the horn cover (4) is made of light-tight materials.

5. An optoelectronic fluid level sensor as claimed in claim 4, wherein: the inner wall of the pull horn cover (4) is fixedly connected with an annular plate (8) close to the lower end.

6. An optoelectronic fluid level sensor as claimed in claim 1, wherein: the replacing mechanism (5) comprises a first transverse plate (51), a first fixing plate (52), a third fixing plate (53), a second transverse plate (54), a second fixing plate (55) and a spring (56); the utility model discloses a connecting rod, including connecting rod (3), one end outer fixed surface fixedly connected with third fixed plate (53), the inside sliding connection of one end of connecting rod (3) has first diaphragm (51), the both ends of first diaphragm (51) all extend to the outside of connecting rod (3), one side fixedly connected with first fixed plate (52) of first diaphragm (51), the inside position sliding connection who is close to first diaphragm (51) of connecting rod (3) has second diaphragm (54), the both ends of second diaphragm (54) all extend to the outside of connecting rod (3), the one end fixedly connected with second fixed plate (55) of second diaphragm (54), lower surface one side fixedly connected with spring (56) of second diaphragm (54), the one end of spring (56) and the lower surface one side fixed connection of first diaphragm (51).