CN218469961U

CN218469961U - Non-contact liquid level sensor

Info

Publication number: CN218469961U
Application number: CN202222439490.8U
Authority: CN
Inventors: 蒋成豪; 冯郁波
Original assignee: Shenzhen Nengdian Technology Co ltd
Current assignee: Shenzhen Nengdian Technology Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-02-10
Anticipated expiration: 2032-09-14

Abstract

The utility model discloses a non-contact liquid level sensor, wherein, the non-contact liquid level sensor comprises a shell component and a testing component, a holding channel for holding a liquid pipeline is arranged in the shell component, a transmitting port and a receiving port are arranged on two sides of the holding channel, and the transmitting port and the receiving port have a height difference in the horizontal direction; the inside chamber that holds that is formed with of shell subassembly, the test assembly is located and is held the intracavity, and the test assembly includes PCB board and geminate transistors device, locates the PCB board to the geminate transistors device, and the geminate transistors device includes that photoemissive part and photoelectricity receive the piece, and photoemissive part and photoelectricity receive the piece and correspond transmission mouth and receive the mouth and locate holding passageway both sides. The utility model discloses technical scheme relates to level sensor technical field has the transmission mouth and the receiving port of horizontal direction difference in height through the setting, makes photoemissive spare and photoelectric receiver form liquid level height in order to detect liquid pipeline to the three-dimensional light path of liquid pipeline, increases non-contact level sensor's measurement accuracy, reduces measuring error.

Description

Non-contact liquid level sensor

Technical Field

The utility model relates to a level sensor technical field, in particular to non-contact level sensor.

Background

In industrial and agricultural production and manufacturing processes, liquid level measurement or detection is often required, especially in the field of industrial production processes, requirements such as high precision, high stability and real-time detection are provided for liquid level measurement, and a photoelectric liquid level sensor is widely applied in the industrial field due to the fact that a light source and a circuit are combined to measure the liquid level.

However, in the two types of existing photoelectric liquid level sensors, the contact type liquid level sensor detects the height change of the liquid level by using the refraction and reflection of light and the prism, and the prism is soaked in water for a long time, so that scale is easily generated on the surface of the prism, and the measurement accuracy and performance are affected; the non-contact liquid level sensor is arranged on the same horizontal plane by utilizing the corresponding arrangement of the transmitting pair tube and the receiving pair tube, light is emitted by the transmitting pair tube, whether the receiving pair tube can receive the light or not is utilized to judge the change of the liquid level, the light emitted by the transmitting pair tube is possibly scattered when the light passes through the liquid, the scattered light interferes the result of the light received by the receiving pair tube, and the precision and the performance of liquid level measurement are further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art, sets up the transmitting opening and the receiving opening with height difference along the height direction through the holding channel both sides at the holding liquid pipeline, sends three-dimensional light path to the test component, carries out liquid level detection to the liquid pipeline in the holding channel, and increases non-contact level sensor's accuracy.

In order to achieve the above purpose, the non-contact liquid level sensor provided by the utility model comprises a housing component and a testing component, wherein a holding channel for holding a liquid pipeline is arranged in the housing component, two sides of the holding channel are provided with a transmitting port and a receiving port, and the transmitting port and the receiving port have a height difference along the height direction; the test assembly is arranged in the containing cavity and comprises a PCB (printed circuit board), a photoelectric emitting piece and a photoelectric receiving piece, wherein the photoelectric emitting piece and the photoelectric receiving piece correspond to the emitting port and the receiving port and are arranged on two sides of the containing channel so as to support the photoelectric emitting piece to emit photoelectric signals, penetrate through the liquid pipeline through the emitting port and then be received by the photoelectric receiving piece through the receiving port.

In an embodiment of the present invention, the optoelectronic emitting component includes an emitting terminal and a first connecting structure, the first connecting structure is fixedly connected to the PCB, and the emitting terminal is fixedly connected to the first connecting structure;

the photoelectric receiver comprises a receiving terminal and a second connecting structure, the second connecting structure is fixedly connected with the PCB, and the receiving terminal is fixedly connected with the second connecting structure.

In an embodiment of the present invention, the housing assembly includes a lower housing and an upper housing, the accommodating cavity is disposed in the lower housing, and the transmitting opening and the receiving opening are disposed in the lower housing; the upper shell is detachably arranged on the upper side of the lower shell and surrounds the lower shell to form an accommodating channel.

In an embodiment of the present invention, the lower housing is provided with a containing groove, the upper housing is provided with an upper containing structure, at least a portion of the upper containing structure is clamped in the containing groove, and the upper containing structure and the containing groove enclose and form a containing channel.

In an embodiment of the present invention, the lower housing has at least two lower supporting lugs, at least two of the lower supporting lugs are symmetrically disposed on two sides of the accommodating channel, and the lower supporting lugs are provided with first connecting holes; the upper shell is provided with at least two upper support lugs corresponding to the lower support lugs in quantity, the upper support lugs are provided with second connecting holes, and the upper shell is fixedly connected with the lower shell through bolts penetrating through the first connecting holes and the second connecting holes.

The utility model discloses an in the embodiment, the lower journal stirrup is equipped with the constant head tank, it corresponds protruding locating piece that is equipped with to go up the journal stirrup, go up the casing install in during the casing down, the locating piece is inserted and is arranged in the constant head tank.

The utility model discloses an embodiment, the external surface of inferior valve is equipped with the sign groove, sign groove cross section is arrow point shape, the sign groove with holding passageway extending direction is the same.

The utility model discloses an embodiment, shell subassembly still includes the fixed plate, fixed plate detachable install in shell downside down, and with the shell encloses to close down and forms and hold the chamber, the PCB board is located the fixed plate.

The utility model discloses an embodiment, the protruding joint step that is equipped with of fixed plate, joint step ring is located the fixed plate, the casing is equipped with the joint groove down, the fixed plate install in during the casing down, joint step butt the joint groove.

The utility model discloses an embodiment, the fixed plate is equipped with the third connecting hole, the PCB board correspondence is equipped with the fourth connecting hole, the PCB board with the fixed plate is through wearing to locate the third connecting hole reaches the bolt fixed connection of fourth connecting hole.

The utility model discloses technical scheme forms the light path by photoelectric emission spare to photoelectric receiving piece through adopting the transmission mouth and the receiving port that have the difference in height of direction of height in the holding passageway both sides that the shell subassembly formed, when there is not liquid to exist at the liquid pipeline section that the light path pierces through, the light path can not change, it is corresponding, when there is liquid to exist at the liquid pipeline section that the pipeline pierces through, the light path of light transmission produces the deviation because the difference of liquid refracting index and air, the light that photoelectric emission spare sent can't arrive smoothly and pass through the receiving port, and shine in holding passageway internal face, photoelectric receiving piece can't receive the light via the receiving port smoothly, so, can receive light through photoelectric receiving piece and judge whether there is liquid to exist in the liquid pipeline by transmission mouth to receiving port section. The light can be scattered when passing through the liquid pipeline, the light spot mapped by the inner wall surface of the accommodating channel at one side of the receiving port is deformed due to scattering, part of the deformed light spot can still reach the receiving port after being refracted and can be received by the photoelectric receiver, in order to avoid the influence of the liquid scattering on the sensor, the transmitting port and the receiving port with height difference in the height direction are arranged, and the measuring accuracy of the non-contact liquid level sensor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a non-contact liquid level sensor according to the present invention;

FIG. 2 is a cross-sectional view of the embodiment of FIG. 1 taken along the direction from the transmitting opening to the receiving opening;

FIG. 3 is a cross-sectional view of the embodiment of FIG. 1 taken along the extension of the upper and lower lugs;

FIG. 4 is an exploded view of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the upper housing of the embodiment of FIG. 1 at another angle;

FIG. 6 is a schematic view of the embodiment of FIG. 1 showing another angle of the lower housing;

FIG. 7 is a schematic view of the embodiment of FIG. 1 showing a further angle of the lower housing;

fig. 8 is a schematic diagram of the optical path of the embodiment in fig. 1.

The reference numbers illustrate:

the realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a non-contact level sensor 100 for measure the liquid pipeline.

In one novel embodiment of the present invention, as shown in FIGS. 1-8, the non-contact liquid level sensor 100 includes a housing assembly 10 and a test assembly 30. The housing assembly 10 is provided with a containing passage for containing the liquid pipeline, two sides of the containing passage are provided with an emitting port 131 and a receiving port 133, and the emitting port 131 and the receiving port 133 have a height difference along the height direction; the housing assembly 10 is formed with an accommodating cavity inside, the testing assembly 30 is disposed in the accommodating cavity, the testing assembly 30 includes a PCB 31, a photoelectric transmitting element 33 and a photoelectric receiving element 35, the photoelectric transmitting element 33 and the photoelectric receiving element 35 correspond to an transmitting opening 131 and a receiving opening 133 disposed on two sides of the accommodating channel, so as to support the photoelectric transmitting element 33 to transmit a photoelectric signal, and the photoelectric signal penetrates through a liquid pipeline through the transmitting opening 131 and is received by the photoelectric receiving element 35 through the receiving opening 133.

Specifically, when no liquid exists in the liquid pipe section penetrated by the light path, the light is emitted through the photoelectric emitting element 33, passes through the emitting port 131, the accommodating channel, the receiving port 133 and reaches the photoelectric receiving element 35, the light is directly emitted, and the transmitted light path is not changed; correspondingly, when there is liquid in the liquid pipe section through which the light path penetrates, the light path of the light transmission is deviated due to the difference between the refractive index of the liquid and the refractive index of the air, the light emitted from the photoelectric emitting element 33 cannot smoothly reach and pass through the receiving opening 133, but irradiates the inner wall surface of the accommodating passage, and the photoelectric receiving element 35 cannot smoothly receive the light signal. With this arrangement, it is possible to judge whether or not liquid exists in the section of the liquid line from the emitting port 131 to the receiving port 133 by whether or not the light receiving member receives the light signal.

It can be understood that the height difference formed by the emitting opening 131 and the receiving opening 133 may be that the emitting opening 131 is higher than the receiving opening 133 in the height direction, or that the emitting opening 131 is lower than the receiving opening 133 in the height direction, and the photo-electric emitting element 33 and the photo-electric receiving element 35 are disposed corresponding to the height difference, so that the light transmission path can achieve the preset effect, which is not specifically limited in the present application.

With reference to fig. 1 to 4 and fig. 8, specifically, a diameter of the receiving channel is defined as D, a height difference between the emitting opening 131 and the receiving opening 133 in the height direction is defined as H, and there is a negative correlation between D and H. Limited by the size of the optics and sensors, in the case where the application can be implemented, D is less than or equal to 15mm, and 0 < H < D/2.

It can be understood that light may also be scattered when passing through the liquid pipeline, and the scattering causes the light to be transmitted to the inner wall surface of the receiving channel at one side of the receiving port 133 with a certain radian, and the light spot mapped is deformed, and the deformed light spot is changed from a point shape to a surface shape, and a part of the light spot may still reach the receiving port 133 after being refracted and be received by the photoelectric receiving part 35, so that whether the non-contact liquid level sensor 100 has misjudgment on the liquid, and in order to avoid the influence of the liquid scattering on the non-contact liquid level sensor 100, the transmitting port 131 and the receiving port 133 with height difference in the height direction are provided, and the measurement accuracy of the non-contact liquid level sensor 100 is increased.

It can be understood that the light emitting element 33 is electrically connected to the PCB 31, and the intensity of the light emitted by the light emitting element 33 is controlled by the circuit disposed on the PCB 31; the optical receiver 35 is electrically connected to the PCB 31, and the light intensity value received by the optical receiver 35 can be converted into a digital signal value through a circuit provided on the PCB 31 for subsequent processing.

It should be noted that, if the light emitting element and the light receiving element are located at the same height, the deviation of the direct light caused by the refraction of the liquid is small, and there is still a possibility that a part of the light enters the receiving opening 133 and reaches the photoelectric receiving element 35, which affects the judgment of the liquid state or position by the photoelectric sensor and affects the use effect of the photoelectric sensor. The emitting port 131 and the receiving port 133 which are located at different heights enable the path of the light path and the receiving port 133 to have a certain angle, when the light path is affected by liquid to emit and refract, the change of the light path is more obvious, the deviation angle is larger, the possibility that the light still reaches the receiving port 133 after being refracted is completely avoided, and the measurement accuracy of the non-contact liquid level sensor 100 is further enhanced.

As shown in fig. 1 to 4, in an embodiment of the present invention, the optoelectronic transmitting element 33 includes a transmitting terminal 331 and a first connecting structure 333, the first connecting structure 333 is fixedly connected to the PCB board 31, and the transmitting terminal 331 is fixedly connected to the first connecting structure 333.

The optical receiver 35 includes a receiving terminal 351 and a second connecting structure 353, the second connecting structure 353 is fixedly connected to the PCB 31, and the receiving terminal 351 is fixedly connected to the second connecting structure 353.

Specifically, the transmitting terminal 331 is used for providing incident light to a liquid pipeline to be tested, the receiving terminal 351 is used for receiving the light, and the first connecting structure 333 and the second connecting structure 353 are respectively used for fixing the transmitting terminal 331 and the receiving terminal 351, so that the transmitting terminal 331 and the receiving terminal 351 are located at different heights, and the transmitting terminal 331, the transmitting port 131, the receiving port 133 and the receiving terminal 351 can be located on the same straight line in space. By the arrangement, the light path can be ensured to be accurately emitted by the photoelectric emitting part 33 and received by the photoelectric receiver 35 when liquid does not flow through the sections of the emitting port 131 and the receiving port 133, and a stable three-dimensional light path is formed. It is understood that the first connecting structure 333 and the second connecting structure 353 may be fixedly connected to the PCB 31 or fixedly connected to the inside of the housing assembly, so that the transmitting terminal 331 and the receiving terminal 351 may have a fixed spatial position in the receiving cavity formed by the lower housing 13. For example, in the present embodiment, the first connecting structure 333 and the second connecting structure 353 are configured to be fixedly connected to the PCB 31, and then the circuit for electrically connecting the transmitting terminal 331 and/or the receiving terminal 351 to the PCB 31 may be disposed in the first connecting structure 333 and/or the second connecting structure 353, so that the first connecting structure 333 and/or the second connecting structure 353 can both support the transmitting terminal 331 and/or the receiving terminal 351, thereby increasing the measurement accuracy of the contactless liquid level sensor 100; the circuit of the transmitting terminal 331 and/or the receiving terminal 351 electrically connected to the PCB 31 can be protected, and the stability of the contactless liquid level sensor 100 can be increased.

Referring to fig. 1 to 7, in an embodiment of the present invention, the housing assembly 10 includes a lower housing 13 and an upper housing 11, the accommodating cavity is disposed on the lower housing 13, and the transmitting opening 131 and the receiving opening 133 are disposed on the lower housing 13; the upper shell 11 is detachably mounted on the upper side of the lower shell 13, and encloses with the lower shell 13 to form an accommodating channel. The upper shell 11 and the lower shell 13 which are composed of the upper shell 11 which is detachably mounted enclose a containing channel together, so that the liquid pipeline in a complex environment can be tested conveniently, for example, the liquid pipeline which is mounted on equipment or the liquid pipeline in an immovable experimental device. Specifically, in the using process of the non-contact liquid level sensor 100, the upper shell 11 and the lower shell 13 are moved to the position to be tested and then installed, so that the use convenience of the non-contact liquid level sensor 100 and the adaptability of the application scene are further improved.

Further, the material of shell subassembly 10 can be materials such as plastics, resin or metal, can hold test assembly 30 and protect it, avoid external environment as far as to test assembly 30's interference in holding the chamber when forming the holding passageway can, this application does not do specifically to this and limits.

As shown in fig. 1 to 6, in an embodiment of the present invention, the lower housing 13 is provided with a receiving groove 135, the upper housing 11 is convexly provided with an upper receiving structure 111, and at least a portion of the upper receiving structure 111 is clamped in the receiving groove 135 of the lower side, and forms a receiving channel with the receiving groove 135 of the lower side. It can be understood that, the convex step-shaped upper accommodating structure 111 is at least partially clamped on the inner wall surface of the accommodating groove 135 at the lower side, so that the process of installing the upper accommodating structure 111 on the lower shell 13 can be guided by the upper accommodating structure 111, and the use convenience of the non-contact liquid level sensor 100 is further improved; the upper receiving structure 111 and the receiving groove 135 abut against each other, so that the movement of the upper housing 11 perpendicular to the extending direction of the receiving channel is limited, and the stability of the non-contact liquid level sensor 100 is further improved.

As shown in fig. 1 to 7, in an embodiment of the present invention, the lower housing 13 is at least provided with two lower supporting lugs 137, the at least two lower supporting lugs 137 are symmetrically disposed at two sides of the accommodating channel, and the lower supporting lugs 137 are provided with first connecting holes 137a; the upper shell 11 is provided with at least two upper lugs 113 corresponding to the number of the lower lugs 137, the upper lugs 113 are provided with second connecting holes 113a, and the upper shell 11 and the lower shell 13 are fixedly connected through bolts penetrating through the first connecting holes 137a and the second connecting holes 113 a. It can be understood that when the liquid pipeline to be tested is thin, the detachable upper shell 11 and the detachable lower shell 13 may encounter obstacles in the installation process, and the upper support lug 113 and the lower support lug 137 are correspondingly arranged to increase the contactable area in the installation process, so that the installation convenience of the non-contact liquid level sensor 100 is improved, and the user experience is improved. Corresponding first connecting hole 137a and second connecting hole 113a that set up at lower journal stirrup 137 and upper lug 113, again by bolt fixed connection, so set up, further increased the firm degree that upper lug 113 and lower journal stirrup 137 are connected, made non-contact level sensor 100 have better stability.

It should be noted that, one of the first connection hole 137a and the second connection hole 113a may be a threaded hole and one may be a through hole, so that one side of the through hole deviating from the threaded hole is screwed in and fixed during bolt installation, and both may also be through holes, so that a nut is correspondingly arranged on one side deviating from the screwing-in end during bolt connection for fixation. Exemplarily, through bolt fixed connection in the technical scheme of this embodiment, bolt fixed connection is as the commonly used connected mode of equipment, and upper housing 11 and lower housing 13 that set up so have easy dismounting, simple structure's advantage, have increased non-contact level sensor 100's economic nature, have reduced non-contact level sensor 100's manufacturing cost.

It can be understood that the extending direction of the upper lug 113 and the lower lug 137 has a certain angle with the extending direction of the accommodating channel, so that the upper shell 11 and the lower shell 13 forming the accommodating channel can be fixed in different directions while the accommodating of the liquid pipeline to be tested in the accommodating channel is not affected, so that the pressure in the directions different from the extending direction is generated on the liquid pipeline, the stability of the liquid pipeline in the accommodating channel is ensured, and the working stability of the non-contact liquid level sensor 100 is further improved.

Optionally, the lower support lug 137 is provided with a positioning groove 137b, the upper support lug 113 is correspondingly provided with a positioning block 113b in a protruding manner, and when the upper housing 11 is installed on the lower housing 13, the positioning block 113b is inserted into the positioning groove 137b; specifically, the quantity of locating piece 113b can be a plurality of, the last holding structure 111 both sides of last journal stirrup 113 are located to a plurality of locating piece 113b symmetries, lower casing 13 corresponds the locating piece 113b quantity of last casing 11 and sets up constant head tank 137b, when going up casing 11 and installing in casing 13 down, a locating piece 113b inserts and arranges in a constant head tank 137b, so set up, the stability that last casing 11 and casing 13 are fixed has further been increased, the stability of the holding passageway that last casing 11 and casing 13 enclose has been guaranteed, guarantee that the awaiting measuring liquid pipeline that lies in the holding passageway can not because of the unstable rocking or the slip that probably appears of being connected of last casing 11 and casing 13 down, guarantee non-contact level sensor 100's test accuracy, increase non-contact level sensor 100's job stabilization nature.

And/or, the outer surface of lower casing 13 is equipped with sign groove 17, and sign groove 17 cross section is the arrow point shape, and sign groove 17 is the same with the holding channel extending direction. It will be appreciated that the entire process of emitting light from the photoemissive member 33 and receiving light from the photoemitter 35 disposed in the receiving cavity is directional, and the provision of the identification groove 17 on the outer surface of the lower housing 13 avoids confusion of the installation direction that may occur during installation due to the sensor disposed in the receiving cavity. The cross section of the mark groove 17 may be arrow-shaped, semicircular or other asymmetric patterns, and the light transmission direction can be expressed, which is not specifically limited in the present application. Illustratively, in the present embodiment, the cross section of the mark slot 17 is arrow-shaped, so as to clearly and clearly indicate the light transmission direction, thereby facilitating the installation process of the non-contact liquid level sensor 100, avoiding the possible installation error, and further increasing the usability and stability of the non-contact liquid level sensor 100.

As shown in fig. 1 to 4, in an embodiment of the present invention, the housing assembly 10 further includes a fixing plate 15, the fixing plate 15 is detachably installed at the lower side of the lower housing 13 and forms a containing cavity with the lower housing 13, and the PCB board 31 is disposed on the fixing plate 15. It is understood that the fixing plate 15 may be made of plastic, resin, or metal, and the fixing plate 31 may be fixed to the lower housing 13 to form a receiving cavity, which is not limited in this application. The fixing plate 15 enables the PCB 31 arranged in the accommodating cavity to be separated from the non-contact liquid level sensor 100 along with the assembly and disassembly of the fixing plate 15, so that when the PCB 31 or the photoelectric transmitting part 33 or the photoelectric receiving part 35 has a fault, the component with the fault can be conveniently taken out and repaired or replaced, the applicability of the non-contact liquid level sensor 100 is further improved, and the service life of the non-contact liquid level sensor 100 is prolonged.

As shown in fig. 2 to 4, in an embodiment of the present invention, the fixing plate 15 is provided with a protruding clamping step, the clamping step is annularly disposed on the fixing plate 15, the lower housing 13 is provided with a clamping groove, and the fixing plate 15 is mounted on the lower housing 13 and abuts against the clamping step. It can be understood that the clamping step encircling the fixing plate 15 and the clamping groove encircling the lower side of the lower housing 13 limit the movement of the fixing plate 15 in the axial direction in the process of installing the fixing plate 15 in the lower housing 13, that is, the photo-electric transmitter 33 and the photo-electric receiver 35 have the relative position relationship with the transmitter 131 and the receiver 133, and the stability of the relative position relationship is increased, the possibility that the positions of the photo-electric transmitter 33 and the photo-electric receiver 35 are not correspondingly matched with the positions of the transmitter 131 and the receiver 133 is reduced, and the practical stability and the measurement accuracy of the non-contact liquid level sensor 100 are further increased.

As shown in fig. 2 to 4, in an embodiment of the present invention, the fixing plate 15 is provided with a third connecting hole 151, the pcb 31 is correspondingly provided with a fourth connecting hole 311, and the pcb 31 is fixedly connected to the fixing plate 15 by a bolt passing through the third connecting hole 151 and the fourth connecting hole 311.

It should be noted that, one of the third connecting hole 151 and the fourth connecting hole 311 may be a threaded hole and one may be a through hole, and then the corresponding one side deviating from the threaded hole by the through hole is screwed in and fixed during bolt installation, or both may be through holes, and then a nut is correspondingly arranged on one side deviating from the screwing end during bolt connection for fixation. Bolt fixed connection is as the connected mode that equipment was used commonly, and the last PCB board 31 and the fixed plate 15 that so set up have easy dismounting, and simple structure's advantage has increased non-contact level sensor 100's economic nature, has reduced non-contact level sensor 100's manufacturing cost.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A non-contact level sensor for measuring a liquid line, the non-contact level sensor comprising:

the liquid pipeline collecting device comprises a shell assembly, a liquid pipeline collecting device and a liquid pipeline collecting device, wherein a containing channel for containing the liquid pipeline is arranged in the shell assembly, a transmitting opening and a receiving opening are arranged on two sides of the containing channel, the containing channel is defined to have a height direction, and a height difference is formed between the transmitting opening and the receiving opening along the height direction; and

the test component comprises a PCB, a photoelectric emitting piece and a photoelectric receiving piece, wherein the photoelectric emitting piece and the photoelectric receiving piece correspond to the emitting port and the receiving port and are arranged on two sides of the accommodating channel, so that a photoelectric signal emitted by the photoelectric emitting piece is supported to penetrate through a liquid pipeline through the emitting port and then received by the photoelectric receiving piece through the receiving port.

2. The contactless liquid level sensor of claim 1, wherein the optoelectronic transmitter includes a transmitting terminal and a first connecting structure, the first connecting structure fixedly connecting the PCB board, the transmitting terminal fixedly connecting the first connecting structure;

3. The non-contact liquid level sensor of claim 1, wherein the housing assembly comprises:

the accommodating cavity is arranged in the lower shell, and the transmitting port and the receiving port are arranged in the lower shell; and

the upper shell is detachably arranged on the upper side of the lower shell and surrounds the lower shell to form an accommodating channel.

4. The contactless liquid level sensor according to claim 3, wherein the lower housing has a receiving groove, the upper housing has an upper receiving structure protruding therefrom, and the upper receiving structure is at least partially engaged with the receiving groove and forms the receiving channel with the receiving groove.

5. The contactless liquid level sensor according to claim 3, wherein the lower housing has at least two lower support lugs, at least two of the lower support lugs are symmetrically disposed on two sides of the receiving channel, and the lower support lugs have first connecting holes; the upper shell is provided with at least two upper support lugs corresponding to the lower support lugs in quantity, the upper support lugs are provided with second connecting holes, and the upper shell is fixedly connected with the lower shell through bolts penetrating through the first connecting holes and the second connecting holes.

6. The contactless liquid level sensor of claim 5, wherein the lower support lug is provided with a positioning groove, the upper support lug is correspondingly provided with a positioning block in a protruding manner, and when the upper housing is mounted on the lower housing, the positioning block is inserted into the positioning groove.

7. The non-contact liquid level sensor of claim 3, wherein the outer surface of the lower shell is provided with an identification groove, the cross section of the identification groove is in an arrow shape, and the identification groove and the accommodating channel extend in the same direction.

8. The non-contact liquid level sensor of claim 3, wherein the housing assembly further comprises a fixing plate detachably mounted to a lower side of the lower housing and enclosing the lower housing to form a receiving cavity, and the PCB board is disposed on the fixing plate.

9. The non-contact liquid level sensor of claim 8, wherein the fixing plate is convexly provided with a clamping step, the clamping step is annularly arranged on the fixing plate, the lower shell is provided with a clamping groove, and when the fixing plate is installed on the lower shell, the clamping step is abutted against the clamping groove.

10. The non-contact liquid level sensor of claim 8, wherein the fixing plate is provided with a third connecting hole, the PCB is correspondingly provided with a fourth connecting hole, and the PCB is fixedly connected with the fixing plate through a bolt penetrating through the third connecting hole and the fourth connecting hole.