Liquid level detector

Abstract

The invention relates to the field of liquid level detection devices, in particular to a liquid level detector which is structurally characterized in that a floater comprises a movable plate, side plates are arranged on the two sides of the movable plate, the side plates extend inwards to be provided with first sliding rods and second sliding rods, and the side plates are matched with side edge sliding grooves of positioning rods through the first sliding rods and the second sliding rods; according to the device, the probe emits laser and receives and processes electric signals generated by a reflected light source, the first sliding rod and the second sliding rod of the floating device are embedded into the side sliding groove, the diameter of the first sliding rod is smaller than that of the second sliding rod, the first sliding rod and the second sliding rod are prevented from being clamped in the side sliding groove, the first sliding rod and the second sliding rod are of a cylindrical structure, and the detection accuracy is improved. The vertical displacement smoothness can be improved, the plate body is rotationally connected with the movable shaft, precision reduction caused by too large shaking of the plate body due to too large gaps can be avoided, meanwhile, the protruding detection table is arranged at the top of the plate body and used for the emission surface of a laser point, and drainage holes are formed in the periphery of the detection table.

Description

Technical Field

[0001] The invention relates to a liquid level detector, belonging to the field of liquid level detection devices. Background Art

[0002] Given the high safety risks of flammable liquids, non-contact liquid level detection technology has been widely adopted to safely and effectively monitor the volume changes of these liquids in containers.

[0003] However, due to the varying densities of various flammable liquids, the reflection principle commonly relied upon by non-contact sensors often introduces significant errors when measuring liquid levels. While attempts to optimize measurement accuracy can be made by adjusting sensor parameters, this process is not only complex and cumbersome, but can also compromise ease of use and increase the complexity of data processing. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a liquid level detector to solve the above problems.

[0005] To achieve the above-mentioned object, the present invention is implemented through the following technical solution: a liquid level detector, the structure of which includes: a detector, a positioning rod mounted on the bottom of the detector, a slidable float mounted on the surface of the positioning rod, the float comprising a movable plate, side plates provided on both sides of the movable plate, a first slide bar and a second slide bar extending inwardly and mounted on the side plates, the side plates engaging with side grooves of the positioning rod via the first slide bar and the second slide bar, the movable plate being movably connected to the side plates, and the diameter of the second slide bar being smaller than that of the first slide bar; The detector includes a traction block installed inside the positioning rod and sliding up and down. The traction block is installed with an electromagnetic mechanism formed by an iron core and a coil combination. The traction block moves up and down to pull the first slide bar and the second slide bar of the floater through magnetic force.

[0006] Preferably, the detector also includes a display and a main board, the display is mounted on the surface of the main board, a power supply battery is provided inside the main board, the display is wrapped with a shell on the outside, a mounting groove is provided at the bottom of the shell, and the shell is nested and connected to the positioning rod through the mounting groove, and a probe is also provided at the bottom of the shell, which is opposite to the surface of the float through the detector, and a winder is provided on the surface of the shell, which drives the traction block to move up and down by winding and pulling the wire inside the winder.

[0007] Preferably, the surface of the rod body of the positioning rod is recessed inward to form a side sliding groove, and an inner groove is provided in the middle of the rod body.

[0008] Preferably, a limiting groove is provided at the connection between the side panel and the movable panel.

[0009] Preferably, the movable plate includes a plate body, a movable shaft is installed at the movable part of the plate body, there is a gap between the movable shaft and the inner groove of the movable shaft, the movable shaft is engaged with the inner thread of the groove body of the limiting groove through threads on both sides, and a raised detection platform is provided on the upper surface of the plate body.

[0010] Preferably, the reel includes a wire trough for storing the wires, a protective shell is provided on the outside of the wire trough, a reeling motor is provided on one side of the protective shell for driving the wire trough to rotate forward and reverse, a metal wire is provided inside the wire, and the metal wire of the wire is connected to the internal circuit of the main board through a sliding contact connected to the wire trough.

[0011] Preferably, the surface edge of the detection table is provided with a drainage hole that passes through the detection table and the plate body, the bottom of the plate body is provided with a bottom groove and a reflux hole, the reflux hole is opposite to the position of the detection table, the edge of the detection table is provided with a slope, and the slope is provided with a guide groove with a narrow upper end and a narrow lower end.

[0012] Preferably, the wire is provided with a metal wire inside and an insulating sleeve outside.

[0013] Preferably, the traction block includes a limit block, which is bonded and fixed to the outer skin of the conductor. The limit block is connected to a sealed shell, an iron core is nested at the bottom of the sealed shell, the iron core and the coil form an electromagnetic structure, the coil is electrically connected to the metal wire inside the conductor, and a counterweight block is also provided at the bottom of the sealed shell.

[0014] Preferably, the sealed shell is made of plastic, has a rectangular groove inside that matches and nests with the iron core, and has an outer surface of the sealed shell with a plane opposite to the iron core.

[0015] The present invention provides a liquid level detector with the following effects: the device emits a laser through a probe and receives and processes the electrical signal generated by the reflected light source; the first slide bar and the second slide bar of the floater are engaged with the side slide groove; the diameter of the first slide bar is smaller than the diameter of the second slide bar to avoid getting stuck inside the side slide groove; the first slide bar and the second slide bar adopt a columnar structure, which can improve the smoothness of up and down displacement; the plate body is rotatably connected to the movable shaft to avoid the reduction of accuracy caused by excessive shaking of the plate body due to an excessive gap; at the same time, a raised detection platform is provided on the top of the plate body for the emission surface of the laser point, and drainage holes are provided around the detection platform to avoid interference caused by liquid on the surface; The reel cooperates with the traction block to magnetically attract the first slide bar and the second slide bar of the movable plate, driving the floater to move up and down to flip the movable plate, so that the liquid can be completely separated from the movable plate under the action of gravitational potential energy, which is more convenient and eliminates the need for disassembly during maintenance. The reel uses the wire to move the traction block up and down to enable the first slide bar and the second slide bar to clean the inside of the side chute, which is more sensitive during detection, and avoids some liquid from forming dirt after drying and remaining in the inside of the side chute to affect detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 The figure is a structural schematic diagram of a liquid level detector of the present invention.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the detector of the present invention.

[0018] Figure 3 It is a schematic diagram of the explosion structure of the floater of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the movable plate of the present invention.

[0020] Figure 5 It is a bottom view structural schematic diagram of the present invention.

[0021] Figure 6 It is a structural schematic diagram of the movable plate of the present invention flipping downward.

[0022] Figure 7 It is a structural schematic diagram of the winder of the present invention.

[0023] Figure 8 For the present invention Figure 1 A magnified schematic diagram of the structure in (a).

[0024] In the picture: 1. Detector; 2. Floater; 3. Positioning rod; 11. Display; 12. Mainboard; 13. Battery; 14. Housing; 15. Probe; 16. Mounting slot; 17. Winder; 18. Traction block; 21. Movable plate; 22. Side plate; 23. Limiting groove; 24. First slide bar; 25. Second slide bar; 31. Rod body; 32. Side slide; 33. Inner groove; 171. Winding motor; 172. Wire duct; 173. Wire; 174. Protective shell; 175. Sliding contact; 181. Limit block; 182. Sealed housing; 183. Iron core; 184. Coil; 185. Counterweight; 211. Plate body; 212. Movable shaft; 213. Inspection table; 214. Drain hole; 215. Guide groove; 216. Bottom groove; 217. Return hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] Due to the varying densities of various flammable liquids, existing non-contact sensors, which rely on the reflection principle, often introduce significant errors when measuring liquid levels. While it is possible to optimize measurement accuracy by adjusting sensor parameters, this process is not only complex and cumbersome, but can also compromise ease of use and increase the difficulty of data processing. To address these issues, this case proposes the following technical solutions: See also Figures 1 to 8 The present invention provides a technical solution for a liquid level detector, which comprises a detector 1, a positioning rod 3 being mounted on the bottom of the detector 1, a slidable floater 2 being mounted on the surface of the positioning rod 3, the floater 2 comprising a movable plate 21, side plates 22 being provided on both sides of the movable plate 21, a first slide bar 24 and a second slide bar 25 being mounted inwardly extending from the side plates 22, the side plates 22 being engaged with side grooves of the positioning rod 3 via the first slide bar 24 and the second slide bar 25, the movable plate 21 being movably connected to the side plates 22, and the diameter of the second slide bar 25 being smaller than the diameter of the first slide bar 24; The detector 1 includes a traction block 18 installed inside the positioning rod 3 and sliding up and down. The traction block 18 is installed with an electromagnetic mechanism composed of an iron core 183 and a coil 184. The traction block 18 moves up and down to pull the first slide bar 24 and the second slide bar 25 of the floater 2 through magnetic force.

[0028] When in use: The main structure of this device includes a detector 1, which is used for detection. The floater 2 is used to cooperate with the detector 1 to work to ensure that the float can work stably during use. The floater 2 is nested on the surface of the positioning rod 3. The positioning rod 3 guides the overall stability to prevent the floater 2 from moving around in the liquid.

[0029] The detector 1 includes a display 11, a main board 12, and a battery 13. The display 11 is used to display the main parameters. The main board 12 has a built-in data processing chip and a communication module, such as a 5G communication module, which can remotely communicate and timely transmit real-time liquid levels to improve monitoring efforts. The battery 13 is used to power the equipment. The use of low-power data transmission can extend the service life of the battery 13 and avoid the trouble of frequent charging.

[0030] The main board 12 is installed inside the shell 14. The shell 14 is made of flame retardant material to seal the main board 12. A probe 15 and a mounting groove 16 are set at the bottom of the shell 14. The probe 15 is a laser sensor. The mounting groove 16 is used to connect with the rod body 31 of the positioning rod 3. Side grooves 32 are set on both sides of the rod body 31. The side grooves 32 are used to limit the movement of the floater 2 to avoid its offset and the resulting failure of laser reflection. An inner groove 33 is opened inside the rod body 31, which can be easily clamped through the inner groove 33 to extend the overall length and make the detection stroke of the floater 2 larger.

[0031] The floater 2 includes a movable plate 21, with side plates 22 installed on both sides of the movable plate 21. The movable ends of the side plates 22 are provided with limiting grooves 23. When the movable plate 21 and the side plates 22 move, they are locked by the limiting grooves 23 to prevent the movable plate 21 from over-turning.

[0032] A first slide bar 24 and a second slide bar 25 extend inwardly from the limiting groove 23 , wherein the diameter of the first slide bar 24 is smaller than that of the second slide bar 25 , and the first slide bar 24 and the second slide bar 25 are engaged in the inside of the side slide groove 32 and are slidably connected to the side slide groove 32 .

[0033] The first slide bar 24 can avoid the jamming caused by the offset of the side plate 22, and can help the floater 2 to be more stable when sliding. During use, there may be liquid on the surface of the movable plate 21, causing interference with the probe 15 during use. For this purpose, the present device optimizes the plate body 211. Specifically, the surface of the plate body 211 is provided with a raised detection platform 213, and the surface of the detection platform 213 is provided with a drainage hole 214. The first slide bar 24 passes through the surface of the plate body 211, and a guide groove 215 is provided on the annular surface of the detection platform 213. The guide groove 215 is a narrow upper and wide lower structure, which improves the drainage efficiency through the tension between the liquids.

[0034] A through hole is formed at the movable end of the plate body 211 , in which a movable shaft 212 is disposed. The movable shaft 212 is rotatably engaged with the through hole, and threads on both sides of the movable shaft 212 are fixedly connected to the holes of the side plate 22 .

[0035] A reflux hole 217 and a bottom groove 216 are provided at the bottom of the plate 211 . The reflux hole 217 is opened at the bottom of the detection platform 213 to reduce the thickness of the plate 211 and increase the speed during discharge.

[0036] The bottom groove 216 at the bottom of the plate 211 surrounds part of the liquid inside when the liquid floats, which can reduce the shaking of the liquid surface. Once the liquid surface shakes, the liquid remaining on the surface of the detection table 213 will be shaken to the non-detection area, making it more stable during use.

[0037] In order to avoid the movable plate 21 from being blocked from sliding in the side groove 32 on the surface of the rod body 31 during long-term use, and the need to disassemble when there is liquid on the surface of the detection table 213 that is difficult to remove, the reel 17 installed on the side of the shell 14 drives the traction block 18 at the bottom to move inside the positioning rod 3.

[0038] The specific reel 17 is internally provided with a driven reeling motor 171. The reeling motor 171 adopts a micro stepping motor and cooperates with the wire trough 172 installed inside the protective shell 174 to reel the wire 173. Wrapping the wire 173 by the protective shell 174 can improve the sealing performance, and at the same time can protect the wire trough 172 and the wire 173, thereby improving the stability of use.

[0039] The wire 173 supplies power to the traction block 18. When the winding motor 171 drives the wire 173 to be retracted and released, the wire slot 172 is in a rotating state. In order to enable it to conduct electricity, a sliding contact 175 is set at the main axis of rotation of the wire slot 172 to cooperate with the shaft rod of the wire slot 172. The surface of the sliding contact 175 is provided with a contact, which slides with the contact on the surface of the shaft rod of the wire slot 172. The wire of the wire 173 is welded at the connection of the contact of the wire slot 172, so it can also conduct electricity during rotation and winding.

[0040] The first slide bar 24 and the second slide bar 25 are made of metal inside and have a corrosion-resistant protective layer on the outside. They cooperate with the traction block 18. A limit block 181 that cooperates with the wire 173 is provided on the top of the traction block 18. The limit block 181 is installed on the top of the sealed shell 182. The internal iron core 183 and the coil 184 are wrapped by the sealed shell 182 to prevent the coil 184 from being corroded. A counterweight block 185 is provided at the bottom of the sealed shell 182. The counterweight block 185 can be used to make the wire 173 vertical through the action of gravity to avoid entanglement and make it more convenient to control the up and down displacement.

[0041] In order to prevent the traction block 18 from being corroded when immersed for a long time, the bottom of the inner groove 33 of the positioning rod 3 is set to a closed state to form a sealed cavity. In the initial state, it is at the top position driven by the winder 17 for easy positioning, or when the movable plate 21 needs to be maintained, the winding motor 171 of the winder 17 works to make the wire groove 172 rotate clockwise, release the wire 173, and make the traction block 18 sink. At this time, the wire 173 forms a loop with the inside of the coil 184, and the iron core 183 generates magnetism.

[0042] Since the probe 15 can record the distance parameters between the probe 15 and the movable plate 21 when working, the rotation data of the winding motor 171 can be referenced with the data of the probe 15 .

[0043] During maintenance work, the maintenance personnel send a signal through the terminal, and the winder 17 traction block 18 is lowered to the position of the floater 2, and is lifted in the opposite direction after reaching the position. At this time, the movable plate 21 will flip downward due to the lack of support from the liquid surface. When the movable plate 21 flips, the reflected light received by the probe 15 becomes weaker and the parameters disappear, which can serve as a reference for the working status. Then the winder motor 171 repeatedly rotates forward and reverse, causing the movable plate 21 to flip frequently to separate the residual liquid on the surface.

[0044] At the same time, the winding motor 171 can drag the movable plate 21 to move a long distance. During the movement, the side chutes 32 on both sides of the positioning rod 3 can be cleaned, making the inspection smoother.

[0045] The sealed shell 182 is made of plastic, and a rectangular groove is provided inside to match and nest with the iron core 183. The outer surface of the sealed shell 182 is provided with a plane opposite to the iron core 183. By setting a plane opposite to the rectangular groove, the wall thickness of the sealed shell 182 is reduced, which can increase the magnetic force and prevent it from falling off during adsorption and dragging.

[0046] This device emits a laser through the probe 15 and receives the electrical signal generated by the reflected light source for processing. The first slide bar 24 and the second slide bar 25 of the floater 2 are engaged with the side slide groove 32. The diameter of the first slide bar 24 is smaller than the diameter of the second slide bar 25 to avoid getting stuck inside the side slide groove 32. The first slide bar 24 and the second slide bar 25 adopt a columnar structure, which can improve the smoothness of up and down displacement. The rotational connection between the plate body 211 and the movable shaft 212 can avoid the reduction of accuracy caused by excessive shaking of the plate body 211 due to excessive gap. At the same time, a raised detection platform 213 is set on the top of the plate body 211 for the emission surface of the laser point, and drainage holes 214 are set around the detection platform 213 to avoid interference caused by liquid on the surface.

[0047] The reel 17 cooperates with the traction block 18 to magnetically attract the first slide bar 24 and the second slide bar 25 of the movable plate 21, driving the floater 2 to move up and down to flip the movable plate 21, so that the liquid can be completely separated from the movable plate 21 under the action of gravitational potential energy, which is more convenient and eliminates the need for disassembly during maintenance. The reel 17 uses the wire 173 to move the traction block 18 up and down, so that the first slide bar 24 and the second slide bar 25 can clean the inside of the side chute 32, making it more sensitive during detection, and avoiding the formation of dirt inside the side chute 32 after some liquid dries and affects the detection.

[0048] The above only describes the basic principles and preferred embodiments of the present invention. Those skilled in the art may make many changes and improvements based on the above description, and these changes and improvements should fall within the scope of protection of the present invention.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A liquid level detector, comprising: A detector (1), wherein a positioning rod (3) is installed at the bottom of the detector (1), and a slidable floater (2) is installed on the surface of the positioning rod (3), characterized in that: the floater (2) includes a movable plate (21), and side plates (22) are provided on both sides of the movable plate (21), and the side plates (22) extend inwardly and are installed with a first slide rod (24) and a second slide rod (25), and the side plates (22) cooperate with the side slide grooves (32) of the positioning rod (3) through the first slide rod (24) and the second slide rod (25), and the movable plate (21) is movably connected to the side plates (22), and the diameter of the second slide rod (25) is smaller than the diameter of the first slide rod (24); The detector (1) includes a traction block (18) installed inside a positioning rod (3) and sliding up and down. The traction block (18) is installed with an electromagnetic mechanism formed by a combination of an iron core (183) and a coil (184). The traction block (18) moves up and down to pull the first slide bar (24) and the second slide bar (25) of the floater (2) through magnetic force.

2. A liquid level detector according to claim 1, characterized in that: The detector (1) further comprises a display (11) and a mainboard (12), wherein the display (11) is mounted on the surface of the mainboard (12), a power supply battery (13) is provided inside the mainboard (12), and the display (11) is wrapped with a shell (14) on the outside, a mounting groove (16) is provided at the bottom of the shell (14), and the shell (14) is nested and connected with the positioning rod (3) through the mounting groove (16), and a probe (15) is also provided at the bottom of the shell (14), which is opposite to the surface of the floater (2) through the detector (1), and a reel (17) is provided on the surface of the shell (14), and the traction block (18) is driven to move up and down by rolling and pulling the wire (173) inside the reel (17).

3. A liquid level detector according to claim 2, characterized in that: The surface of the rod body (31) of the positioning rod (3) is recessed inward to form a side sliding groove (32), and an inner groove (33) is provided in the middle of the rod body (31).

4. A liquid level detector according to claim 1, characterized in that: A limiting groove (23) is provided at the connection between the side plate (22) and the movable plate (21).

5. A liquid level detector according to claim 4, characterized in that: The movable plate (21) includes a plate body (211), a movable shaft (212) is installed at the movable portion of the plate body (211), a gap exists between the movable shaft (212) and the inner groove of the movable shaft (212), the movable shaft (212) is engaged with the inner thread of the groove body of the limiting groove (23) through threads on both sides, and a protruding detection platform (213) is provided on the upper surface of the plate body (211).

6. A liquid level detector according to claim 2, characterized in that: The reel (17) includes a wire trough (172) for receiving a wire (173), a protective shell (174) is provided on the outside of the wire trough (172), a reeling motor (171) for driving the wire trough (172) to rotate forward and reverse is provided on one side of the protective shell (174), a metal wire is provided inside the wire (173), and the metal wire of the wire (173) is connected to a sliding contact (175) through the wire trough (172) and is connected to an internal circuit of the main board (12).

7. A liquid level detector according to claim 5, characterized in that: The edge of the surface of the detection platform (213) is provided with a drainage hole (214) that passes through the detection platform (213) and the plate body (211); the bottom of the plate body (211) is provided with a bottom groove (216) and a return hole (217); the return hole (217) is opposite to the position of the detection platform (213); the edge of the detection platform (213) is provided with an inclined surface, and the inclined surface is provided with a guide groove (215) with a narrow upper end and a lower end.

8. The liquid level detector according to claim 6, characterized in that: The wire (173) is provided with a metal wire inside and an insulating sleeve outside.

9. A liquid level detector according to claim 2, characterized in that: The traction block (18) comprises a limit block (181), the limit block (181) is bonded and fixed to the outer skin of the wire (173), the limit block (181) is connected to a sealed shell (182), an iron core (183) is nested at the bottom of the sealed shell (182), the iron core (183) and the coil (184) form an electromagnetic structure, the coil (184) is electrically connected to the metal wire inside the wire (173), and a counterweight block (185) is also provided at the bottom of the sealed shell (182).

10. The liquid level detector according to claim 9, characterized in that: The sealing shell (182) is made of plastic, and is provided with a rectangular groove inside thereof to match and nest with the iron core (183), and the outer surface of the sealing shell (182) is provided with a plane opposite to the iron core (183).

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