Pipeline type photoelectric liquid level sensor

Abstract

The invention discloses a pipeline type photoelectric liquid level sensor, and relates to the technical field of photoelectric liquid level sensors, the pipeline type photoelectric liquid level sensor comprises a main pipe, both sides of the main pipe are fixedly provided with screwed joints, and the screwed joint located at the input end of the main pipe is internally provided with a filter assembly. By adopting the above structure, during the use of the device, the circuit board can be first inserted into the shell of the shell, the light emitter and the light receiver are protruded and then inserted into the shell, the light emitter and the light receiver are moved to the prism mechanism for detection, the shell is installed, the annular digging groove is dug to pull the adjusting frame to move outwards, and the arc-shaped limiting frame is separated from the arc-shaped clamping sleeve through linkage. During maintenance, an annular digging groove is dug to pull the adjusting frame, linkage is conducted to enable the arc-shaped limiting frame and the arc-shaped clamping sleeve to be separated, the cover plate is disassembled, the circuit board and other components are disassembled, traditional limitation is broken through, maintenance convenience is improved, maintenance cost is reduced, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of photoelectric liquid level sensors, and in particular relates to a pipeline photoelectric liquid level sensor. Background Art

[0002] In modern industry, life, and medical fields, accurate liquid level monitoring is crucial. Photoelectric liquid level sensors have become an indispensable part of many systems due to their ability to accurately detect liquid level changes based on optical principles. They use the differences in the refraction and reflection characteristics of light in air and liquid. The light source, light receiver, and detection circuit work together to achieve non-contact accurate liquid level detection. When the liquid level does not reach the detection position, most of the light is received by the light receiver, and the circuit outputs a specific signal; when the liquid level rises and contacts the sensor, the light propagation changes, and the amount of light received by the light receiver changes. The detection circuit judges the liquid level status and outputs the corresponding electrical signal based on this. It is widely used in water tank and oil tank liquid level monitoring scenarios, effectively ensuring the normal operation of equipment and system safety.

[0003] With the advancement of technology, relevant scientific researchers have actively innovated. For example, the Chinese patent with the announcement number "CN218035252U" discloses a pipeline photoelectric liquid level sensor. The sensor works in coordination through the shell structure, PCBA board and pipeline structure, and uses a transparent material to form the pipeline structure and the shell structure in one piece. The built-in prism structure assists light propagation. It has the advantages of simple process, low cost, no need for waterproof design, and the liquid flow channel is straight to ensure detection accuracy. However, the existing technology still has obvious shortcomings in practical applications. Its electronic components are installed in the installation cavity of the shell structure. Long-term use is prone to damage due to aging, abnormal circuit voltage, etc., and because it is an integrated installation, the subsequent disassembly and maintenance is extremely cumbersome. Even if bolts and screws are used for fixing, the bolts and screws are prone to rust and be clogged by dust after long-term use, making it difficult to disassemble and even slip during the disassembly process. Special screwdrivers and other tools are required to assist, which seriously affects the maintenance efficiency and convenience. Therefore, it is urgent to innovate and improve the design of the existing photoelectric liquid level sensor to overcome these shortcomings and better meet the needs of various fields for accurate liquid level monitoring and convenient equipment maintenance. Summary of the invention

[0004] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a pipeline photoelectric liquid level sensor to solve the problem that the existing technology is difficult to disassemble and repair during use.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A pipeline photoelectric liquid level sensor comprises a main pipe, both sides of which are fixedly mounted with threaded joints, a filter assembly is arranged inside the threaded joint at the input end of the main pipe, a prism mechanism is fixedly mounted on one side of the main pipe, a shell is fixedly mounted on the outer side of a side of the main pipe close to the prism mechanism, a shell is inserted inside the shell, a circuit board is inserted inside the shell, one end of the circuit board close to the prism mechanism is fixedly connected with a light transmitter, the other end of the circuit board close to the prism mechanism is fixedly connected with a light receiver, a side of the circuit board away from the shell is fixedly connected with a cover plate, a mounting mechanism is arranged on the outer side of the cover plate, the cover plate is clamped with the shell through the mounting mechanism, wiring holes are arranged linearly at equal intervals at the lower end of the cover plate, wires are inserted inside the wiring holes, and the wires are electrically connected to the circuit board.

[0007] As a preferred technical solution, the filter assembly includes an internal thread, which is opened inside the threaded interface at the input end of the main pipe. The threaded interface at the input end of the main pipe is threadedly connected to an inner pipe via the internal thread, and a filter screen is fixedly installed inside the inner pipe.

[0008] As a preferred technical solution, an adjusting twist ring is fixedly installed on the outer side of the filter screen cover, and the outer surface of the adjusting twist ring is provided with anti-slip arc grooves arranged in a ring shape at equal intervals.

[0009] As a preferred technical solution, the prism mechanism includes a main frame, which is fixedly installed on one side of the main pipe close to the outer shell, a first prism surface is fixedly connected to the middle part of the main frame, and a second prism surface is fixedly installed on the top and bottom of the main frame. The light emitter emits a light beam through the first prism surface and the second prism surface and is received by the light receiver.

[0010] As a preferred technical solution, the mounting mechanism includes a fixed column and a rail frame, the fixed column is fixedly connected to the two ends of the top rear side and the two ends of the bottom rear side of the main frame, the outer side of the fixed column is fixedly installed with an arc-shaped clamping sleeve, the rail frame is fixedly installed on the upper end of the back side of the cover plate, the inner ends of the rail frame are fixedly installed with elastic components, the top of the elastic component is provided with an adjustment component, the outer ends of the rail frame are fixedly installed with clamping components, and the ends of the clamping components are inserted into the interior of the arc-shaped clamping sleeve.

[0011] As a preferred technical solution, the elastic component includes a telescopic spring, which is fixedly installed at both ends of the inside of the rail frame, and the outer end of the telescopic spring is fixedly provided with a slider in a ring shape, and the outer side of the slider is fixedly provided with a frame, the top of the slider is linked to the adjustment component, and the outer end of the frame passes through the rail frame and is connected to the clamping component.

[0012] As an optimal technical solution, the clamping assembly includes a rack and a fixing frame, the rack is fixedly installed inside the frame, the fixing frame is fixedly installed on the outer end of the rail frame, the fixing frame is internally rotatably connected with a gear, the gear and the rack are meshingly connected, and the top and bottom of the gear are fixedly installed with a limit member, and the limit member is inserted into the inside of the arc-shaped clamping sleeve.

[0013] As an optimal technical solution, the limiting member includes a connecting shaft, which is fixedly installed on the top and bottom of the gear, and the connecting shaft is rotatably connected to the fixed frame. A connecting plate is fixedly installed on the outer end of the connecting shaft, and an arc-shaped limiting frame is fixedly installed on the side of the connecting plate close to the main pipe, and the end of the arc-shaped limiting frame is inserted into the interior of the arc-shaped limiting sleeve, and the arc-shaped limiting frame, the arc-shaped limiting sleeve and the connecting shaft are arranged in concentric circles.

[0014] As an optimal technical solution, the adjustment component includes a rotating shaft, which is rotatably connected to the top of the slider, a linkage plate is fixedly installed on the upper end of the rotating shaft, an adjustment frame is hinged on the inner side of the linkage plate, and an annular groove is opened in the middle of the inner side of the adjustment frame.

[0015] As a preferred technical solution, the filter screen cover is overall conical in shape, and a sealing gasket is provided on the outer side of the threaded joint.

[0016] In summary, the present invention mainly has the following beneficial effects:

[0017] First, the device is provided with a filter assembly so that in actual use, the main pipe and the outlet pipe can be connected by a threaded joint. When the water flows into the main pipe, the filter assembly starts working immediately. The conical filter screen has a large area and is conical in shape, which can guide impurities to gather in the middle and prevent the screen from being evenly covered and completely blocked. The excellent filtering function effectively prevents dust and impurities from entering the main pipe and preventing them from adhering to the prism mechanism, ensuring the long-term stable operation and accurate detection of the photoelectric liquid level sensor. During detection, the light reflection conditions are different in the absence of water and in the presence of water, and the optical receiver outputs high and low voltage signals to determine the liquid level accordingly. At the same time, the filter assembly prevents impurities from affecting the light transmission of the prism, and the detachable design of the installation mechanism provides convenience for subsequent maintenance.

[0018] Second, the device is provided with an installation mechanism, so that during installation, the circuit board can be first inserted into the shell of the shell, so that the light emitter and the light receiver protrude from the outside of the shell, and then the shell is inserted into the shell. After the light emitter and the receiver are in place, they can be moved to the prism mechanism for detection. During the stage of installing the shell, the annular groove can be pulled to pull the adjustment frame outward, and the adjustment frame drives the slider to move through the linkage plate and the rotating shaft, compressing the telescopic spring, and the frame automatically moves inward, driving the rack drive gear to rotate, so that the arc-shaped limit frame is separated from the arc-shaped ferrule. After the circuit board is installed, the adjustment frame is released, and the spring reset drives the arc-shaped limit frame to insert the arc-shaped ferrule, firmly install the cover plate, and fix the internal components;

[0019] Third, by setting up the installation mechanism, the overall inspection and maintenance of the device can be facilitated. When the circuit board needs to be inspected, it is only necessary to move the annular groove again, pull the adjustment frame, pull the slider inward through the linkage plate, and use the linkage of the gear and the rack to separate the arc-shaped limit frame from the arc-shaped ferrule. The cover on the rear side of the shell can be easily removed, and the circuit board and the optical transmitter and optical receiver can be quickly separated. This design breaks the limitation of the inconvenient inspection and maintenance of traditional photoelectric liquid level sensors, greatly improves the convenience of overall inspection and maintenance, reduces maintenance time and cost, and ensures that the equipment can be restored to normal operation in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the filter assembly of the present invention in a disassembled state;

[0022] Figure 3 It is a schematic diagram of the prism mechanism structure of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the shell and the housing of the present invention in a disassembled state;

[0024] Figure 5 It is a schematic diagram of the structure of the installation mechanism and the shell of the present invention in a disassembled state;

[0025] Figure 6 It is a schematic diagram of the rear view structure of the mounting mechanism of the present invention in a state of overall separation;

[0026] Figure 7 It is a front structural schematic diagram of the mounting mechanism of the present invention in an overall separated state;

[0027] Figure 8 The present invention Figure 5 A is an enlarged structural diagram of FIG.

[0028] Figure numerals: 1, main pipe; 2, threaded joint; 3, filter assembly; 31, internal thread; 32, inner pipe; 33, filter screen; 34, adjusting twist ring; 35, anti-slip arc groove; 4, outer shell; 5, shell; 6, mounting mechanism; 61, fixing column; 62, rail frame; 63, arc-shaped ferrule; 64, elastic assembly; 641, telescopic spring; 642, slider; 643, frame; 65, adjusting assembly; 651, rotating shaft; 652, linkage plate; 653, Adjusting frame; 654, annular groove; 66, snap-on assembly; 661, rack; 662, fixing frame; 663, gear; 664, limiting member; 6641, connecting shaft; 6642, connecting plate; 6643, arc-shaped limiting frame; 7, circuit board; 8, light transmitter; 9, light receiver; 10, cover plate; 11, prism mechanism; 111, main frame; 112, first prism surface; 113, second prism surface; 12, wiring hole; 13, wire. DETAILED DESCRIPTION

[0029] Example

[0030] refer to Figures 1 to 8A pipeline photoelectric liquid level sensor of the present embodiment comprises a main pipe 1, threaded joints 2 are fixedly installed on both sides of the main pipe 1, a filter assembly 3 is arranged inside the threaded joint 2 at the input end of the main pipe 1, a prism mechanism 11 is fixedly installed on one side of the main pipe 1, a shell 4 is fixedly installed on the outer side of the main pipe 1 close to the prism mechanism 11, a shell 5 is inserted inside the shell 4, a circuit board 7 is inserted inside the shell 5, a light transmitter 8 is fixedly connected to one end of the circuit board 7 close to the prism mechanism 11, a light receiver 9 is fixedly connected to the other end of the circuit board 7 close to the prism mechanism 11, a cover plate 10 is fixedly connected to the side of the circuit board 7 away from the shell 5, a mounting mechanism 6 is arranged on the outer side of the cover plate 10, the cover plate 10 is clamped with the shell 4 through the mounting mechanism 6, wiring holes 12 are arranged linearly at equal intervals at the lower end of the cover plate 10, wires 13 are inserted inside the wiring holes 12, and the wires 13 are electrically connected to the circuit board 7. When the pipeline photoelectric liquid level sensor is working, water flows from the input end of the main pipe 1 through the threaded joints 6. The connector 2 flows in, and the filter assembly 3 uses its special structure, such as a large-area conical filter screen 33, to filter impurities in the water to prevent impurities from entering the main pipe 1 and adhering to the prism mechanism 11 to affect the detection. The light transmitter 8 emits light. When no water passes through the main pipe 1, the prism mechanism 11 reflects most of the light to the light receiver 9. After the light receiver 9 receives the signal, the circuit board 7 outputs a corresponding signal through the wire 13; when liquid flows through the main pipe 1, the light propagation changes due to the liquid, the light reflected by the prism mechanism 11 to the light receiver 9 decreases, the light receiver 9 receives a change in the signal, and the circuit board 7 outputs a different signal to judge the liquid level state. During installation, the circuit board 7 is inserted into the shell 5, and then the shell 5 is inserted into the outer shell 4. Through the installation mechanism 6 on the outside of the cover plate 10, such as using the ring groove 654 to drive a series of mechanical structures, the cover plate 10 and the outer shell 4 are clamped and fixed to ensure the stable operation of each component. The wire 13 is electrically connected to the circuit board 7 through the wiring hole 12 to ensure signal transmission.

[0031] refer to Figure 1-Figure 2The filter assembly 3 includes an internal thread 31, which is arranged inside the threaded interface at the input end of the main pipe 1. The threaded interface at the input end of the main pipe 1 is threadedly connected with an inner pipe 32 through the internal thread 31. A filter screen cover 33 is fixedly installed inside the inner pipe 32, and an adjusting torsion ring 34 is fixedly installed outside the filter screen cover 33. The outer surface of the adjusting torsion ring 34 is arranged in a ring shape with equal intervals and has anti-slip arc grooves 35. The filter screen cover 33 is arranged in a conical shape as a whole. A sealing gasket is provided on the outside of the threaded joint 2. When installing the filter assembly 3 of the pipeline photoelectric liquid level sensor, the internal thread 31 in the threaded interface at the input end of the main pipe 1 is used to screw in the inner pipe 32 with the filter screen cover 33, and the filter screen cover 33 is connected through the thread. To achieve fixation, the sealing gasket on the outside of the threaded joint 2 can prevent water leakage. When water flows in from the input end of the main pipe 1, it first passes through the filter screen cover 33. Since it is overall conical in shape, has a large area and the inclined surface can guide impurities to gather in the middle, it can avoid dust and impurities from evenly covering the screen cover and causing blockage. During use, if it is necessary to clean or replace the filter screen cover 33, it can be operated by rotating the adjustment torsion ring 34. The anti-slip arc groove 35 on the outer surface of the adjustment torsion ring 34 is convenient for the user to apply force, and the inner tube 32 can be easily screwed out from the main pipe 1. After cleaning or replacement, it can be screwed back in, ensuring that the filter component 3 continues to effectively play a filtering role and preventing impurities from entering the main pipe 1 and affecting the detection performance of the prism mechanism 11.

[0032] refer to Figure 3 The prism mechanism 11 includes a main frame 111, which is fixedly installed on one side of the main pipe 1 close to the housing 4. A first prism surface 112 is fixedly connected to the middle of the main frame 111, and a second prism surface 113 is fixedly installed on the top and bottom of the main frame 111. The light emitter 8 emits a light beam through the first prism surface 112 and the second prism surface 113, which is received by the light receiver 9. When the device is running, the light emitter 8 emits a light beam, which first passes through the first prism surface 112 in the middle of the main frame 111. The main frame 111 is fixedly installed on one side of the main pipe 1 close to the housing 4, which can To ensure stable propagation of the light beam, if there is no water in the main pipe 1, the light beam is refracted by the first prism surface 112, and then further reflected by the second prism surface 113 at the top and bottom of the main frame 111, and finally received by the light receiver 9. At this time, the light receiver 9 receives a stronger light signal, and the circuit board 7 outputs a corresponding signal accordingly. When there is water in the main pipe 1, the water will change the propagation path and refraction and reflection of the light beam, so that the light reaching the light receiver 9 after passing through the first prism surface 112 and the second prism surface 113 becomes weaker, the light receiver 9 receives a change in the signal, and the circuit board 7 outputs a different signal, thereby realizing the judgment of the liquid level state.

[0033] refer to Figure 1-Figure 2 and Figure 4-Figure 8The mounting mechanism 6 includes a fixed column 61 and a rail frame 62. The fixed column 61 is fixedly connected to the top rear ends and the bottom rear ends of the main frame 111. An arc-shaped clamping sleeve 63 is fixedly installed on the outer side of the fixed column 61. The rail frame 62 is fixedly installed on the upper end of the back side of the cover plate 10. Elastic components 64 are fixedly installed at both ends of the inner part of the rail frame 62. An adjusting component 65 is provided on the top of the elastic component 64. A clamping component 66 is fixedly installed on the outer end of the rail frame 62. The end of the clamping component 66 is inserted into the inner part of the arc-shaped clamping sleeve 63. The elastic component 64 includes a telescopic spring 641. The telescopic spring 641 is fixedly installed at both ends of the inner part of the rail frame 62. A slider 642 is fixedly installed in a ring shape on the outer end of the telescopic spring 641. A frame 643 is fixedly installed on the outer side of the slider 642. The top of the slider 642 is linked with the adjusting component 65. The outer end of the frame 643 passes through the rail frame 62 and is connected with the clamping component 66. The pipeline light The working principle of the installation mechanism 6 of the electric liquid level sensor is as follows: during the installation process, when the cover plate 10 is brought close to the main frame 111, the arc-shaped clamping sleeves 63 on the outside of the fixed columns 61 at both ends of the top and bottom rear sides of the main frame 111 are ready to receive the clamping assembly 66, and the adjustment assembly 65 is actuated to link the slider 642, so that the slider 642 compresses the telescopic springs 641 at both ends inside the rail frame 62, and at the same time drives the frame 643 to move, thereby driving the clamping assembly 66 to disengage from the arc-shaped clamping sleeve 63. When the cover plate 10 moves to a suitable position, the adjustment assembly 65 is released, and the telescopic spring 641 resets and extends, pushing the slider 642 and the frame 643 to move outward, so that the clamping assembly 66 is inserted into the arc-shaped clamping sleeve 63, realizing a stable clamping connection between the cover plate 10 and the main frame 111, thereby fixing the internal components such as the circuit board 7. This design not only facilitates the installation operation, but also ensures the stability of each component during use, thereby ensuring the normal operation of the sensor.

[0034] refer to Figure 4-Figure 8The clamping assembly 66 includes a rack 661 and a fixing frame 662. The rack 661 is fixedly installed inside the frame 643. The fixing frame 662 is fixedly installed on the outer end of the rail frame 62. The fixing frame 662 is rotatably connected with a gear 663 inside. The gear 663 and the rack 661 are meshed and connected. The top and bottom of the gear 663 are fixedly installed with a limit member 664. The limit member 664 is inserted into the interior of the arc-shaped clamping sleeve 63. The limit member 664 includes a connecting shaft 6641. The connecting shaft 6641 is fixedly installed on the top and bottom of the gear 663. The connecting shaft 6641 is rotatably connected to the fixing frame 662. The outer end is fixedly installed with a connecting plate 6642, and the side of the connecting plate 6642 close to the main pipe 1 is fixedly installed with an arc-shaped limit frame 6643, and the end of the arc-shaped limit frame 6643 is inserted into the interior of the arc-shaped limit sleeve. The arc-shaped limit frame 6643, the arc-shaped limit sleeve and the connecting shaft 6641 are arranged in concentric circles. The adjustment component 65 includes a rotating shaft 651, and the rotating shaft 651 is rotatably connected to the top of the slider 642. The upper end of the rotating shaft 651 is fixedly installed with a linkage plate 652, and the inner side of the linkage plate 652 is hinged with an adjustment frame 653, and the inner middle part of the adjustment frame 653 is provided with an annular groove 654. The pipeline type photoelectric liquid level sensor In the installation mechanism 6 of the device, the clamping assembly 66 and the adjustment assembly 65 work together. When the cover plate 10 needs to be installed or removed, the adjustment frame 653 drives the linkage plate 652 hinged thereto to move by moving the annular groove 654 in the middle of the inner side of the adjustment frame 653. The linkage plate 652 rotates, so that the rotating shaft 651 fixed to its lower end rotates on the top of the slider 642, thereby driving the slider 642 to slide in the rail frame 62, compressing the telescopic spring 641, and the slider 642 moves to drive the frame 643. The frame 643 pushes the rack 661 to move. Since the rack 661 is connected to the gear 663 in the rotation connection in the fixed frame 662, The rack 661 is meshed, and the driving gear 663 is moved to rotate. When the gear 663 rotates, the connecting shaft 6641 fixed at the top and bottom thereof rotates synchronously. The connecting shaft 6641 drives the connecting plate 6642 at the outer end to rotate, so that the arc-shaped limit frame 6643 on one side of the connecting plate 6642 makes a circular motion around the connecting shaft 6641 and separates from the arc-shaped clamping sleeve 63. After the installation is completed, the adjusting frame 653 is loosened, the telescopic spring 641 is reset, and the slider 642 is pushed in the reverse direction, so that the arc-shaped limit frame 6643 is reinserted into the arc-shaped clamping sleeve 63, so as to realize the stable clamping of the cover plate 10 and ensure the stable installation and normal operation of the internal components of the sensor.

[0035] Principle and advantages of use: This device can effectively improve its stability and detection accuracy by setting the filter component 3. In practical applications, the main pipe 1 is connected to the water outlet pipe through the threaded joint 2. When the water flows into the main pipe 1 through the threaded joint 2, the filter component 3 plays a key role. The conical filter screen cover 33 has a large area and a conical structure. Its inclined surface can effectively guide the filtered impurities to gather in the middle of the filter screen cover 33 to avoid uniform coverage of dust and impurities, thereby preventing the filter screen cover 33 from being completely blocked. This design not only has an excellent filtering function, but also effectively prevents dust and impurities from entering the main pipe 1 and adhering to the prism mechanism 11, ensuring the photoelectric liquid level sensor The long-term stable detection performance can also maintain the accuracy of its detection function. During the detection process, when no water passes through the main pipe 1, the prism structure reflects most of the light emitted by the light emitter 8 to the light receiver 9, and the light receiver 9 outputs a high voltage signal; when liquid flows through the main pipe 1, the light propagation path changes, and the prism structure only reflects a small part of the light to the light receiver 9, and the light receiver 9 outputs a low voltage signal, so as to accurately determine the water and no water state. In addition, the filter component 3 can prevent impurities from adhering to the outer surface of the prism mechanism 11 and affecting light transmission, further improving the overall convenience of the device, and with the detachable design of the mounting mechanism 6, it provides convenience for subsequent inspection and maintenance;

[0036] The device is provided with an installation mechanism 6 so that during the installation process during use, the circuit board 7 can be inserted into the shell 5 of the shell 4, so that the light emitter 8 and the light receiver 9 on the circuit board 7 protrude from the outside of the shell 5, and then the shell 5 is inserted into the shell 4. When the two are inserted and installed in place, the light emitter 8 and the light receiver 9 are moved to the prism mechanism 11, and the detection work can be started. During the installation stage of the shell 5, the adjustment frame 653 can be pulled outward by moving the annular groove 654. The movement of the adjustment frame 653 synchronously drives the two linkage plates 652 to move, and the linkage plate 652 drives the two The rotating shaft 651 causes the slider 642 to move accordingly. The linkage plate 652, the rotating shaft 651 and the adjusting frame 653 are of hinged design. By pulling the adjusting frame 653, the linkage plate 652 can be flexibly driven, and then the slider 642 is pulled to compress the telescopic spring 641. In this process, the frame 643 automatically moves inward. The movement of the frame 643 drives the rack 661 to drive the gear 663 to rotate. The rotation of the gear 663 causes the arc-shaped limit frame 6643 to rotate outward, so that the arc-shaped limit frame 6643 and the arc-shaped ferrule 63 are separated from each other. When the circuit board 7 is installed, the adjusting frame 6 is released. 53, the telescopic spring 641 is reset, and the slider 642 is pulled inward, and the slider 642 drives the rack 661, and drives the gear 663 to rotate again, and the rotation of the gear 663 drives the top and bottom connecting shafts 6641 to rotate, and the rotation of the connecting shaft 6641 drives the arc-shaped limit frame 6643 to rotate through the connecting plate 6642, so that the arc-shaped limit frame 6643 is accurately inserted into the arc-shaped ferrule 63. Through the mutual insertion and clamping mode of the arc-shaped limit frame 6643 and the arc-shaped ferrule 63, the cover plate 10 can be firmly installed on the rear side of the housing 4. This design can not only firmly clamp the housing 4 The internal shell 5 can also fix the circuit board 7, the light transmitter 8 and the light receiver 9 at the same time. When the circuit board 7 needs to be disassembled for inspection, the annular groove 654 is moved again, the adjustment frame 653 is pulled, and the two sliders 642 are pulled inward through the linkage plate 652. The linkage mechanism of the gear 663 and the rack 661 is used to separate the arc-shaped limit frame 6643 and the arc-shaped sleeve 63 again. At this time, the cover plate 10 can be easily removed from the back side of the shell 4, realizing the rapid disassembly and assembly of the circuit board 7, the light transmitter 8 and the light receiver 9, which greatly improves the convenience of the overall inspection and maintenance of the device.

Claims

1. A pipeline photoelectric liquid level sensor, comprising a main pipe, characterized in that: Threaded joints are fixedly installed on both sides of the main pipe, a filter assembly is arranged inside the threaded joint at the input end of the main pipe, a prism mechanism is fixedly installed on one side of the main pipe, a shell is fixedly installed on the outer side of a side of the main pipe close to the prism mechanism, a shell is inserted inside the shell, a circuit board is inserted inside the shell, an optical transmitter is fixedly connected to one end of the circuit board close to the prism mechanism, an optical receiver is fixedly connected to the other end of the circuit board close to the prism mechanism, a cover plate is fixedly connected to the side of the circuit board away from the shell, a mounting mechanism is arranged on the outer side of the cover plate, the cover plate is clamped with the shell through the mounting mechanism, wiring holes are arranged linearly at equal intervals at the lower end of the cover plate, wires are inserted inside the wiring holes, and the wires are electrically connected to the circuit board.

2. A pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The filter assembly includes an internal thread, which is arranged inside a threaded interface at an input end of the main pipe. The threaded interface at the input end of the main pipe is threadedly connected to an inner pipe via the internal thread, and a filter screen is fixedly installed inside the inner pipe.

3. A pipeline photoelectric liquid level sensor according to claim 2, characterized in that: An adjusting twist ring is fixedly installed on the outer side of the filter screen cover, and anti-slip arc grooves are arranged in a ring shape at equal intervals on the outer surface of the adjusting twist ring.

4. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The prism mechanism includes a main frame, which is fixedly installed on one side of the main pipe close to the outer shell. A first prism surface is fixedly connected to the middle of the main frame, and a second prism surface is fixedly installed on the top and bottom of the main frame. The light emitter emits a light beam through the first prism surface and the second prism surface and is received by the light receiver.

5. The pipeline photoelectric liquid level sensor according to claim 1, characterized in that: The mounting mechanism includes a fixing column and a rail frame, wherein the fixing column is fixedly connected to the two ends of the top rear side and the two ends of the bottom rear side of the main frame, an arc-shaped clamping sleeve is fixedly installed on the outer side of the fixing column, and the rail frame is fixedly installed on the upper end of the back side of the cover plate, and elastic components are fixedly installed on both ends of the inner side of the rail frame, and an adjustment component is provided on the top of the elastic component, and a clamping component is fixedly installed on the outer end of the rail frame, and the end of the clamping component is inserted into the inner side of the arc-shaped clamping sleeve.

6. The pipeline photoelectric liquid level sensor according to claim 5, characterized in that: The elastic component includes a telescopic spring, which is fixedly installed at both ends of the rail frame. The outer end of the telescopic spring is fixedly provided with a slider in a ring shape, and the outer side of the slider is fixedly provided with a frame. The top of the slider is linked to the adjustment component, and the outer end of the frame passes through the rail frame and is connected to the clamping component.

7. The pipeline photoelectric liquid level sensor according to claim 6, characterized in that: The clamping assembly includes a rack and a fixing frame, the rack is fixedly installed inside the frame, the fixing frame is fixedly installed on the outer end of the rail frame, a gear is rotatably connected inside the fixing frame, the gear and the rack are meshed and connected, and a limiting member is fixedly installed on the top and bottom of the gear, and the limiting member is inserted into the inside of the arc-shaped clamping sleeve.

8. The pipeline photoelectric liquid level sensor according to claim 7, characterized in that: The limiting member includes a connecting shaft, which is fixedly installed on the top and bottom of the gear. The connecting shaft is rotatably connected to the fixing frame. A connecting plate is fixedly installed on the outer end of the connecting shaft. An arc-shaped limiting frame is fixedly installed on the side of the connecting plate close to the main pipe. The end of the arc-shaped limiting frame is inserted into the interior of the arc-shaped limiting sleeve. The arc-shaped limiting frame, the arc-shaped limiting sleeve and the connecting shaft are arranged in concentric circles.

9. The pipeline photoelectric liquid level sensor according to claim 6, characterized in that: The adjustment component includes a rotating shaft, which is rotatably connected to the top of the slider, a linkage plate is fixedly installed on the upper end of the rotating shaft, an adjustment frame is hinged on the inner side of the linkage plate, and an annular groove is opened in the middle of the inner side of the adjustment frame.

10. The pipeline photoelectric liquid level sensor according to claim 2, characterized in that: The filter screen cover is arranged in a cone shape as a whole, and a sealing gasket is arranged on the outer side of the threaded joint.

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