Low liquid level prompting device and using method thereof

Abstract

The invention discloses a low liquid level prompting device and a using method thereof.The low liquid level prompting device comprises a storage box, a liquid level measuring mechanism for measuring the liquid level height is arranged in the storage box and comprises a mounting ring, a mounting cylinder is fixedly mounted at the upper end of the mounting ring, and a floating ball ascending and descending along with the liquid level is arranged in the mounting cylinder; a reverse wave mechanism for eliminating waves generated in the storage box is arranged on the outer wall, close to the floating ball, of the mounting cylinder, a pull rope is fixedly mounted at the lower end of the floating ball, and a reminding mechanism for reminding when the liquid level is low is arranged at the other end of the pull rope; the telescopic spring pushes the moving ring to move upwards, after the floating ball descends to a certain height, the moving ring moves upwards to drive the connecting insertion groove to move upwards, the connecting insertion groove is connected with the connecting plug, the auxiliary line is powered on, the power-on line is powered on, the alarm works, and therefore reminding is more convenient and faster after the liquid level in the storage box descends to a certain height.

Description

Technical Field

[0001] This invention relates to the field of liquid level detection technology, specifically a low liquid level indicator device and its usage method. Background Technology

[0002] A liquid level sensor (static pressure level gauge / level transmitter / level sensor / water level sensor) is a pressure sensor that measures liquid level. The static pressure submersible level transmitter (level gauge) is based on the principle that the static pressure of the measured liquid is proportional to its height. It uses an isolated diffused silicon sensing element or a ceramic capacitive pressure sensor to convert the static pressure into an electrical signal. After temperature compensation and linear correction, it is converted into a standard electrical signal (typically 4–20mA / 1–5VDC), suitable for measuring the liquid level of various media in systems and industries such as petrochemicals, metallurgy, power, pharmaceuticals, water supply and drainage, and environmental protection.

[0003] Chinese patent discloses a differential pressure hydrostatic level and its measurement system (publication number CN116972807A). The level includes a high-level pressure sensor and a low-level pressure sensor. The high-level pressure sensor is positioned directly above the low-level pressure sensor, with a height difference of k. During measurement, the ratio of the difference between the first hydraulic pressure value measured by the low-level pressure sensor and the second hydraulic pressure value measured by the high-level pressure sensor, and the product of the liquid density and the local gravitational acceleration, is equal to the difference between the first height difference between the low-level pressure sensor and the liquid surface of the storage tank, and the second height difference between the high-level pressure sensor and the liquid surface of the storage tank, and is always equal to the height difference k. After equation transformation, the first height difference between the low-level pressure sensor and the liquid surface of the storage tank is equal to the product of the first height difference and k divided by the difference between the first height difference and the second height. This invention eliminates the calculation error caused by the liquid density ρ and the local gravitational acceleration g during measurement by setting the height difference in the differential pressure hydrostatic level.

[0004] The existing water level measuring mechanisms described above calculate the water level change by measuring the pressure difference between the sensor and the liquid level. However, the electronic sensing devices in the prior art suffer from aging and increased error after prolonged immersion in liquid. This necessitates frequent checks for malfunctions before measurement, which not only reduces the lifespan of the electronic sensing devices but also adds cumbersome procedures, making them inconvenient and lacking in ease of use. Therefore, this invention provides a low liquid level indicator device and its usage method to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a low liquid level indicator and its usage method to solve the problem of inconvenient liquid level reminder sensing mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low liquid level indicator device, comprising a storage tank, wherein a liquid level measuring mechanism for measuring the liquid level is provided inside the storage tank, the liquid level measuring mechanism includes a mounting ring, an mounting cylinder is fixedly mounted on the upper end of the mounting ring, a float that rises and falls with the liquid level is provided inside the mounting cylinder, an anti-wave mechanism for eliminating waves generated in the storage tank is provided on the outer wall of the mounting cylinder near the float, a pull rope is fixedly mounted on the lower end of the float, and a reminder mechanism for reminding when the liquid level is low is provided at the other end of the pull rope.

[0007] As a further embodiment of the present invention, a protective cylinder is fixedly installed at the upper end of the mounting ring, and the float is slidably disposed on the inner wall of the protective cylinder. A protective box is fixedly installed at the lower end of the storage box near the pull rope. An adjustable pull rope length winding cylinder is fixedly installed at the end of the pull rope away from the float, and the pull rope is wound and installed in the winding cylinder.

[0008] As a further embodiment of the present invention, a protective cover is provided on the side end of the winding drum, and the winding drum is rotatably mounted on the inner wall of the protective cover. A movable block is fixedly installed at the lower end of the protective cover, and the pulling rope passes through the hole provided in the movable block. A brush ring is fixedly installed on the movable block away from the protective cover. A brush rod is slidably installed on the inner wall of the brush ring, and a resistance calculator is provided at the lower end of the brush rod.

[0009] As a further embodiment of the present invention, a mounting box is fixedly installed on the side of the storage box near the resistance calculator, and the resistance calculator is fixedly installed on the lower inner wall of the mounting box. A sliding cylinder is fixedly installed on the inner wall of the mounting box, and a telescopic spring is fixedly installed on the lower inner wall of the sliding cylinder. A movable ring is fixedly installed on the upper end of the telescopic spring, and the movable ring is slidably installed on the inner wall of the sliding cylinder. A energizing block is fixedly installed on the side of the movable ring near the movable block, and the energizing block is fixedly installed on the side of the movable block. A connecting slot is fixedly installed on the upper end of the movable ring.

[0010] As a further embodiment of the present invention, a pneumatic cylinder is fixedly installed at the upper end of the mounting box, a vent pipe is fixedly installed at the upper end of the pneumatic cylinder, a vent telescopic pipe is fixedly installed at the other end of the vent pipe, and the air inlet end of the vent telescopic pipe is fixedly installed at the air outlet end of the float. A piston rod is slidably installed on the inner wall of the pneumatic cylinder, a movable frame is fixedly installed at the lower end of the piston rod, a through-hole ring is provided on the side end of the movable frame near the brush rod, an electric coil is fixedly installed at the end of the movable frame away from the piston rod, and the electric coil is slidably installed on the inner wall of the sliding cylinder. An electric plug is fixedly installed at the upper end of the electric coil, and a connecting plug is fixedly installed at the lower end of the electric coil.

[0011] As a further embodiment of the present invention, the reminder mechanism includes a storage battery, which is fixedly installed on the outer side of the mounting box. A positive line and a secondary line are fixedly installed on the output end of the storage battery. A connecting line is fixedly installed on the end of the secondary line away from the storage battery, and the end of the connecting line away from the storage battery is fixedly installed on the upper end of the energized block.

[0012] As a further embodiment of the present invention, the other end of the main line is fixedly installed with an installation slot, the upper end of the installation box near the installation slot is fixedly installed with a fixing box, the end of the fixing box away from the installation slot is fixedly installed with a power supply slot, the end of the power supply slot away from the fixing box is fixedly installed with a power supply wire, and the end of the power supply wire away from the power supply slot is fixedly installed with an alarm.

[0013] As a further embodiment of the present invention, the anti-wave mechanism includes a lifting ring, with multiple anti-wave plates arrayed on the upper end of the lifting ring, a pneumatic telescopic rod fixedly installed on the lower end of the lifting ring, a pneumatic pressure ring fixedly installed on the lower end of the pneumatic telescopic rod, multiple air transmission pipes arrayed on the outer wall side of the pneumatic pressure ring, a pneumatic cylinder fixedly installed on the end of each air transmission pipe away from the pneumatic pressure ring, a piston ring slidably installed on the inner wall of each pneumatic pressure cylinder, and an airbag ring fixedly installed on the lower end of each piston ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. When using this invention, when the liquid level in the storage tank begins to drop, the material no longer compresses the float, causing the float to spring back to its original shape under plastic action. This allows the air pressure in the pneumatic cylinder to return to the float through the vent pipe, causing the piston rod to move upward under the air pressure. The piston rod drives the moving frame to move upward, which in turn drives the energizing coil to move upward, causing the energizing plug to move upward. After the energizing plug is inserted into one side of the mounting slot and the energizing slot, the energizing plug energizes the mounting slot and the energizing slot, thus energizing the main line. As the float moves downward, the telescopic spring pushes the moving ring upward. When the float drops to a certain height, the upward movement of the moving ring drives the connecting slot to move upward, connecting the connecting slot and the connecting plug, thus energizing the auxiliary line and the power line. The alarm then activates, making it more convenient to alert when the liquid level in the storage tank drops to a certain height.

[0016] 2. When using this invention, after adding material to the storage tank, the material in the storage tank enters the air pressure cylinder through the water inlet. After the material enters the air pressure cylinder, the air bladder ring moves upward, thereby pushing the piston ring upward. This allows the air pressure in the air pressure cylinder to enter the air pressure ring through the air transmission pipe. The air pressure then enters the air pressure telescopic rod through the air pressure ring, causing the telescopic rod to extend and retract, which in turn drives the lifting ring to move upward. When the lifting ring rises to the same height as the liquid level, the anti-wave plate rises above the liquid level. This prevents the storage tank from shaking and generating waves during movement, thus avoiding inaccurate liquid level measurement caused by waves on the liquid surface during shaking. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a low liquid level indicator device.

[0018] Figure 2 This is a schematic diagram of the storage tank in a low liquid level indicator device.

[0019] Figure 3 This is a schematic diagram of the liquid level measuring mechanism in a low liquid level indication device.

[0020] Figure 4 This is a schematic diagram of the structure of a float in a low liquid level indicator device.

[0021] Figure 5 This is a schematic diagram of the mounting box in a low liquid level indicator device.

[0022] Figure 6 This is a schematic diagram of the structure of a pneumatic cylinder in a low liquid level indicator device.

[0023] Figure 7 This is a schematic diagram of the anti-wave mechanism in a low liquid level indicator device.

[0024] Figure 8 This is a schematic diagram of the disassembled structure of the anti-wave mechanism in a low liquid level indicator.

[0025] Figure 9 This is a schematic diagram of the structure of a pneumatic cylinder in a low liquid level indicator device.

[0026] In the diagram: 1. Storage tank; 2. Liquid level measuring mechanism; 201. Mounting ring; 202. Pull rope; 203. Mounting cylinder; 204. Float; 205. Protective cylinder; 206. Protective box; 207. Guide rod; 208. Sealing ring; 209. Winding drum; 210. Protective cover; 211. Moving block; 212. Brush ring; 213. Brush rod; 214. Resistance calculator; 215. Mounting box; 216. Sliding cylinder; 217. Slide rail; 218. Telescopic spring; 219. Moving ring; 220. Power block; 221. Connecting slot; 222. Vent telescopic pipe; 223. Vent pipe; 224. Air 1. Moving cylinder; 225. Piston rod; 226. Moving frame; 227. Through-hole ring; 228. Power coil; 229. Power plug; 230. Connecting plug; 3. Reminder mechanism; 301. Battery; 302. Main line; 303. Secondary line; 304. Mounting slot; 305. Fixing box; 306. Power slot; 307. Power wire; 308. Alarm; 309. Connecting wire; 4. Anti-wave mechanism; 401. Lifting ring; 402. Anti-wave plate; 403. Pneumatic telescopic rod; 404. Air pressure ring; 405. Air transmission pipe; 406. Air cylinder; 407. Piston ring; 408. Airbag ring; 5. Box cover. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-9In this embodiment of the invention, a low liquid level indicator includes a storage tank 1. Inside the storage tank 1 is a liquid level measuring mechanism 2 for measuring the liquid level. The liquid level measuring mechanism 2 includes a mounting ring 201, and an mounting cylinder 203 is fixedly mounted on the upper end of the mounting ring 201. Inside the mounting cylinder 203 is a float 204 that rises and falls with the liquid level. The float 204 is made of a soft material. When material is added to the storage tank 1, the float 204 begins to move upward under the action of buoyancy. When the float 204 stops rising, the material in the storage tank 1 compresses the float 204, reducing its volume and allowing gas to escape from the float 204. The mounting cylinder 203 then... A wave-reflecting mechanism 4 is installed on the outer wall of the float 204 to eliminate waves generated in the storage tank 1. When the material in the storage tank 1 shakes, the wave-reflecting mechanism 4 breaks the waves generated by the shaking, thereby preventing the float 204 from shaking up and down due to the waves. A pull rope 202 is fixedly installed at the lower end of the float 204. The other end of the pull rope 202 is equipped with a reminder mechanism 3 to remind people when the liquid level is low. When the liquid level of the material in the storage tank 1 drops to the alarm level, the pull rope 202 retracts and triggers the reminder mechanism 3, so that the liquid level drops to a suitable height and the reminder mechanism 3 sounds an alarm to remind the staff to add material to the storage tank 1.

[0029] Please see Figures 2-6 A protective cylinder 205 is fixedly installed at the upper end of the mounting ring 201, and a float 204 is slidably disposed on the inner wall of the protective cylinder 205. A protective box 206 is fixedly installed at the lower end of the storage box 1 near the pull rope 202, and the pull rope 202 passes through the protective box 206 and the storage box 1. A sealing ring 208 is provided at the hole of the storage box 1 near the pull rope 202. The sealing ring 208 provided in the storage box 1 prevents the material in the storage box 1 from flowing into the protective box 206 when the pull rope 202 moves through the storage box 1. A guide rod 207 is rotatably installed on the inner wall of the protective box 206, and the pull... The movable rope 202 is wound and installed on the outer wall of the guide rod 207. The guide rod 207 in the protective box 206 changes the direction of movement of the movable rope 202, making the movement of the movable rope 202 more convenient. The end of the movable rope 202 away from the float 204 is fixedly installed with an adjustable winding drum 209, and the movable rope 202 is wound and installed in the winding drum 209. When it is necessary to adjust the floating height of the float 204, the winding drum 209 is rotated, so that the movable rope 202 is wound and contracted on the outer wall of the winding drum 209, thus making it more convenient to adjust the liquid level indicator height.

[0030] Please see Figures 2-6A protective cover 210 is provided on the side end of the winding drum 209, and the winding drum 209 is rotatably mounted on the inner wall of the protective cover 210. The protective cover 210 enables the winding drum 209 to remain stable during rotation. A moving block 211 is fixedly installed at the lower end of the protective cover 210, and the pulling rope 202 passes through the hole provided in the moving block 211. A brush ring 212 is fixedly installed on the moving block 211 away from the protective cover 210. A brush rod 213 is slidably installed on the inner wall of the brush ring 212. A resistance calculator 214 is provided at the lower end of the brush rod 213. When the moving block 211 moves up and down, it drives the brush ring 212 to start moving up and down, thereby causing the brush ring 212 to start moving up and down on the outer wall of the brush rod 213. The resistance changes, making it more convenient for the resistance calculator 214 to calculate the liquid level rise and fall height by calculating the change in the size of the electric drill.

[0031] Please see Figures 2-6 A mounting box 215 is fixedly installed on the side of the storage box 1 near the resistance calculator 214, and the resistance calculator 214 is fixedly installed on the lower inner wall of the mounting box 215. A slide rail 217 is fixedly installed on the side of the inner wall of the mounting box 215, and the side of the moving block 211 is slidably connected to the slide rail 217. The slide rail 217 installed in the mounting box 215 prevents the moving block 211 from shaking and being damaged during lifting and lowering. A sliding cylinder 216 is fixedly installed on the inner wall of the mounting box 215, and a moving groove is opened on the side of the sliding cylinder 216 near the moving block 211, making it more convenient for the moving block 211 to move up and down. A telescopic spring 218 is fixedly installed on the lower inner wall of the sliding cylinder 216. A movable ring 219 is fixedly installed at one end, and the movable ring 219 is slidably installed on the inner wall of the sliding cylinder 216, so that after the movable ring 219 moves downward, the telescopic spring 218 pushes the movable ring 219 upward more conveniently. A power-conducting block 220 is fixedly installed on the side end of the movable ring 219 near the movable block 211, and the power-conducting block 220 is fixedly connected to the brush ring 212 on the side end near the brush ring 212. A connection slot 221 is fixedly installed on the upper end of the movable ring 219. When the movable ring 219 moves up and down in the sliding cylinder 216, it drives the connection slot 221 to move, making it easier to connect the connection slot 221 to the connection plug 230.

[0032] Please see Figures 4-6A pneumatic cylinder 224 is fixedly installed on the upper end of the mounting box 215. A vent pipe 223 is fixedly installed on the upper end of the pneumatic cylinder 224. A vent telescopic pipe 222 is fixedly installed on the other end of the vent pipe 223. The air inlet of the vent telescopic pipe 222 is fixedly installed on the air outlet of the float 204. When material is added to the storage box 1, the material compresses the float 204 and it begins to float. When the float 204 floats to a certain height, it stops floating upwards. If more material is added to the storage box 1, the material will compress the float 204, and the air pressure in the float 204 will be transmitted to the pneumatic cylinder 224 through the vent pipe 223. A piston rod 225 is slidably installed on the inner wall of the pneumatic cylinder 224. A movable frame 226 is fixedly installed on the lower end of the piston rod 225. When air pressure enters the pneumatic cylinder 224, the air pressure pushes the piston rod 225 downwards. The piston rod 225 moves, causing the movable frame 226 to move downwards, making the detection of liquid level changes more accurate. A through-hole ring 227 is provided on the side end of the movable frame 226 near the brush rod 213. When the movable frame 226 moves up and down, after it moves to the appropriate position, the brush rod 213 passes through the through-hole ring 227, thus preventing the movable frame 226 from colliding with the brush rod 213 and causing damage. A current-carrying ring 228 is fixedly installed on the end of the movable frame 226 away from the piston rod 225, and the current-carrying ring 228 is slidably installed on the inner wall of the sliding cylinder 216. A current-carrying plug 229 is fixedly installed on the upper end of the current-carrying ring 228, and the current-carrying plug 229 fits into a current-carrying socket. A connecting plug 230 is fixedly installed on the lower end of the current-carrying ring 228, and the connecting plug 230 fits into a connecting socket.

[0033] Please see Figures 4-6 The reminder mechanism 3 includes a storage battery 301, which is fixedly installed on the outer side of the mounting box 215. The output end of the storage battery 301 is fixedly installed with a positive line 302 and a secondary line 303. The end of the secondary line 303 away from the storage battery 301 is fixedly installed with a connecting line 309, which is twice the length of the resistance rod. This prevents the connecting line 309 from being pulled and damaged during the up-and-down movement of the energized block 220. The end of the connecting line 309 away from the storage battery 301 is fixedly installed on the upper end of the energized block 220, so that the energized block 220 remains energized when it moves up and down with the moving block 211.

[0034] Please see Figures 4-6The other end of the main line 302 is fixedly installed with an installation slot 304. The upper end of the installation box 215 near the installation slot 304 is fixedly installed with a fixing box 305. The end of the fixing box 305 away from the installation slot 304 is fixedly installed with a power-on slot 306, which is configured as a positive and negative slot. When the power plug 229 is inserted into one side of the installation slot 304 and the power-on slot 306, the power plug 229 energizes the installation slot 304 and the power-on slot 306, thereby energizing the main line 302. The end of the power-on slot 306 away from the fixing box 305 is fixedly installed with a power-on wire 307. The end of the power-on wire 307 away from the power-on slot 306 is fixedly installed with an alarm 308. When the main line 302 is energized, the main line 302 is connected to the power-on wire 307, so that the positive terminal of the battery 301 is connected to the alarm 308 and energized. When the auxiliary line 303 is also energized, the alarm sounds.

[0035] Please see Figures 7-9 The anti-wave mechanism 4 includes a lifting ring 401. Multiple anti-wave plates 402 are arrayed on the upper end of the lifting ring 401. A pneumatic telescopic rod 403 is fixedly installed on the lower end of the lifting ring 401. A pneumatic pressure ring 404 is fixedly installed on the lower end of the pneumatic telescopic rod 403. Multiple pneumatic telescopic rods 403 are arrayed and installed between the lifting ring 401 and the pneumatic pressure ring 404, making it easier for the pneumatic telescopic rods 403 to push the lifting ring 401 up and down. Multiple air transmission pipes 405 are arrayed on the outer wall side of the pneumatic pressure ring 404. A pneumatic cylinder 406 is fixedly installed on the end of each air transmission pipe 405 away from the pneumatic pressure ring 404. A water inlet is provided at the lower end of each pneumatic cylinder 406. The pneumatic cylinders 406 are arrayed and installed at the four corners of the storage tank 1. When the material in the storage tank 1 shakes and generates waves, the air pressure in the pneumatic pressure ring 404 is equal to the average pressure of the liquid level. The inner wall of the pneumatic cylinder 406 is... A piston ring 407 is slidably installed, and an airbag ring 408 is fixedly installed at the lower end of the piston ring 407. When material is added to the storage tank 1, the material in the storage tank 1 enters the air pressure cylinder 406 through the water inlet provided by the air pressure cylinder 406. After the material enters the air pressure cylinder 406, the airbag ring 408 moves upward, thereby pushing the piston ring 407 to move upward, so that the air pressure in the air pressure cylinder 406 enters the air pressure ring 404 through the air transmission pipe 405, and the air pressure enters the air pressure telescopic rod through the air pressure ring 404, thereby causing the telescopic rod to start to extend and retract, driving the lifting ring 401 to start to move upward. When the lifting ring 401 rises to the same height as the liquid level, the anti-wave plate 402 is higher than the liquid level, so that when the storage tank 1 shakes and generates waves during the movement, the anti-wave plate 402 breaks the waves, thereby avoiding the generation of waves on the liquid surface during the shaking of the storage tank 1, which would lead to inaccurate measurement of the liquid level height.

[0036] The method of using this invention is as follows: When the lid 5 is opened and the storage tank 1 is filled with material, the material in the storage tank 1 pushes the float 204 to its maximum limit. When the liquid level in the storage tank 1 begins to drop, the material stops pushing the float 204, causing the float 204 to spring back to its original shape under plastic action. This allows the air pressure in the pneumatic cylinder 224 to return to the float 204 through the vent pipe 223, causing the piston rod 225 to move upward under the action of air pressure. The piston rod 225 drives the moving frame 226 to move upward, and the moving frame 226 drives the energizing coil 228 to move upward, causing the energizing plug 229 to move upward and be inserted into the mounting socket. After the mounting slot 304 and the power-on slot 306 are connected on one side, the power plug 229 energizes the mounting slot 304 and the power-on slot 306, thereby energizing the main line 302. As the float 204 moves downward, the telescopic spring 218 pushes the moving ring 219 upward. When the float 204 descends to a certain height, the moving ring 219 moves upward, causing the connecting slot 221 to move upward. The connecting slot 221 connects with the connecting plug 230 and is energized, thereby energizing the auxiliary line 303 and the power-on wire 307. The alarm 308 is activated, making it more convenient to remind the user when the liquid level in the storage tank 1 drops to a certain height.

[0037] When material is added to storage tank 1, the material in storage tank 1 enters air pressure cylinder 406 through the water inlet provided in air pressure cylinder 406. After the material enters air pressure cylinder 406, air bladder ring 408 moves upward, thereby pushing piston ring 407 to move upward, so that the air pressure in air pressure cylinder 406 enters air pressure ring 404 through air transmission pipe 405, and the air pressure enters air pressure telescopic rod through air pressure ring 404, thereby causing the telescopic rod to start extending and retracting, driving lifting ring 401 to start moving upward. When lifting ring 401 rises to the same height as the liquid level, anti-wave plate 402 is higher than the liquid level, so that when storage tank 1 shakes and generates waves during movement, anti-wave plate 402 breaks the waves, thereby avoiding the generation of waves on the liquid surface during shaking of storage tank 1, which would lead to inaccurate measurement of liquid level height.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low liquid level indication device, comprising a storage tank, characterized in that, The storage tank is equipped with a liquid level measuring mechanism for measuring the liquid level height. The liquid level measuring mechanism includes a mounting ring, an mounting cylinder is fixedly mounted on the upper end of the mounting ring, a float that rises and falls with the liquid level is installed inside the mounting cylinder, and an anti-wave mechanism is provided on the outer wall of the mounting cylinder near the float to eliminate waves generated in the storage tank. A pull rope is fixedly mounted on the lower end of the float, and a reminder mechanism is provided at the other end of the pull rope to remind users when the liquid level is low.

2. The low liquid level indicator device according to claim 1, characterized in that, A protective cylinder is fixedly installed at the upper end of the mounting ring, and the float is slidably disposed on the inner wall of the protective cylinder. A protective box is fixedly installed at the lower end of the storage box near the pull rope. An adjustable pull rope length winding drum is fixedly installed at the end of the pull rope away from the float, and the pull rope is wound and installed in the winding drum.

3. A low liquid level indicator device according to claim 2, characterized in that, A protective cover is provided on the side end of the winding drum, and the winding drum is rotatably mounted on the inner wall of the protective cover. A movable block is fixedly installed at the lower end of the protective cover, and the pulling rope passes through the hole provided in the movable block. A brush ring is fixedly installed on the movable block away from the protective cover. A brush rod is slidably installed on the inner wall of the brush ring, and a resistance calculator is provided at the lower end of the brush rod.

4. A low liquid level indicator device according to claim 3, characterized in that, A mounting box is fixedly installed on the side of the storage box near the resistance calculator, and the resistance calculator is fixedly installed on the lower inner wall of the mounting box. A sliding cylinder is fixedly installed on the inner wall of the mounting box, and a telescopic spring is fixedly installed on the lower inner wall of the sliding cylinder. A movable ring is fixedly installed on the upper end of the telescopic spring, and the movable ring is slidably installed on the inner wall of the sliding cylinder. A energizing block is fixedly installed on the side of the movable ring near the movable block, and the energizing block is fixedly installed on the side of the movable block. A connecting slot is fixedly installed on the upper end of the movable ring.

5. A low liquid level indicator device according to claim 4, characterized in that, A pneumatic cylinder is fixedly installed at the upper end of the mounting box. A vent pipe is fixedly installed at the upper end of the pneumatic cylinder. A vent telescopic pipe is fixedly installed at the other end of the vent pipe. The air inlet end of the vent telescopic pipe is fixedly installed at the air outlet end of the float. A piston rod is slidably installed on the inner wall of the pneumatic cylinder. A movable frame is fixedly installed at the lower end of the piston rod. A through-hole ring is provided on the side end of the movable frame near the brush rod. An energizing ring is fixedly installed at the end of the movable frame away from the piston rod. The energizing ring is slidably installed on the inner wall of the sliding cylinder. An energizing plug is fixedly installed at the upper end of the energizing ring. A connecting plug is fixedly installed at the lower end of the energizing ring.

6. A low liquid level indicator device according to claim 4, characterized in that, The reminder mechanism includes a storage battery, which is fixedly installed on the outer side of the mounting box. A positive line and a negative line are fixedly installed on the output end of the storage battery. A connecting line is fixedly installed on the end of the negative line away from the storage battery, and the end of the connecting line away from the storage battery is fixedly installed on the upper end of the power block.

7. A low liquid level indicator device according to claim 6, characterized in that, The other end of the main line is fixedly installed with an installation slot. The upper end of the installation box near the installation slot is fixedly installed with a fixing box. The end of the fixing box away from the installation slot is fixedly installed with a power supply slot. The end of the power supply slot away from the fixing box is fixedly installed with a power supply wire. The end of the power supply wire away from the power supply slot is fixedly installed with an alarm.

8. A low liquid level indicator device according to claim 1, characterized in that, The anti-wave mechanism includes a lifting ring, with multiple anti-wave plates arrayed on the upper end of the lifting ring, a pneumatic telescopic rod fixedly installed on the lower end of the lifting ring, a pneumatic pressure ring fixedly installed on the lower end of the pneumatic telescopic rod, multiple air transmission pipes arrayed on the outer wall side of the pneumatic pressure ring, a pneumatic cylinder fixedly installed on the end of each air transmission pipe away from the pneumatic pressure ring, a piston ring slidably installed on the inner wall of each pneumatic pressure cylinder, and an airbag ring fixedly installed on the lower end of each piston ring.

9. A method of using a low liquid level indicator device, applied to the low liquid level indicator device according to any one of claims 1-8, characterized in that, Includes the following steps: S1: When the tank is filled with material after opening the lid, the material in the tank pushes the float up to its maximum limit. When the liquid level in the tank begins to drop, the material stops pushing the float, causing it to spring back to its original shape under plastic action. This allows the air pressure in the pneumatic cylinder to return to the float through the vent pipe, causing the piston rod to move upward under air pressure. The piston rod drives the moving frame upward, which in turn drives the energizing coil upward, causing the energizing plug to move upward. After the energizing plug is inserted into one side of the mounting slot and the energizing slot, the energizing plug energizes the mounting slot and the energizing slot, thus energizing the main line. As the float moves downward, the telescopic spring pushes the moving ring upward. When the float drops to a certain height, the upward movement of the moving ring drives the connecting slot upward, connecting the connecting slot and the connecting plug, thus energizing the auxiliary line and the main line. The alarm then activates, making it more convenient to alert when the liquid level in the tank drops to a certain height. S2: When material is added to the storage tank, the material enters the air pressure cylinder through the inlet. After the material enters the air pressure cylinder, the air bladder ring moves upward, which in turn pushes the piston ring upward. This allows the air pressure in the air pressure cylinder to enter the air pressure ring through the air transmission pipe. The air pressure then enters the air pressure telescopic rod, causing the telescopic rod to extend and retract, which in turn moves the lifting ring upward. When the lifting ring rises to the same height as the liquid level, the anti-wave plate rises above the liquid level. This prevents the storage tank from shaking and creating waves during movement, thus avoiding inaccurate liquid level measurements caused by waves on the liquid surface during shaking.

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