Remote transmission liquid level meter device with linked floater and fixed pulley

Abstract

The invention relates to the technical field of liquid level meters, in particular to a floater and fixed pulley linkage remote transmission liquid level meter device which comprises a fixing plate, an upper supporting plate and a lower supporting plate, the upper supporting plate and the lower supporting plate are located below the fixing plate, two sets of supporting rods are fixedly connected between the upper supporting plate and the lower supporting plate, and an upper floater and a lower floater are slidably connected to the two sets of supporting rods respectively. An upper fixed pulley and a lower fixed pulley are rotationally arranged on the opposite sides of the upper supporting plate and the lower supporting plate respectively; a connecting rope guided by the upper fixed pulley and the lower fixed pulley is connected between the upper floater and the lower floater; through density adaptation of the glass beads filled in the lower floater and autonomous vertical alignment of the universal ball, and in combination with stable tension formed by the density difference of the double floaters, the accuracy of liquid level measurement and installation convenience are improved; an elastic buffering structure composed of a sliding rod and a spring in the lower floater is used for effectively absorbing impact force generated by sudden change of the liquid level, connecting rope shaking and signal false triggering are avoided, and the adaptability of the device to complex working conditions is enhanced.

Description

Technical Field

[0001] This invention relates to the field of liquid level gauge technology, and in particular to a remote liquid level gauge device that links a float with a fixed pulley. Background Technology

[0002] A level gauge is a measuring device widely used in industrial production such as chemical storage tanks and steel plant water storage pools, municipal engineering such as water supply tanks and sewage treatment ponds, and daily life scenarios. Its core function is to sense the changes in the surface level of the liquid medium in the container in real time through contact or non-contact technology, and convert the changes into a visually observable display or a remotely transmitted signal. This provides data support for level monitoring, automated control, and safety management, ultimately achieving the goal of avoiding risks such as liquid overflow and equipment idling, and ensuring stable production processes and rational use of resources.

[0003] Existing liquid level measuring devices generally suffer from problems such as insufficient measurement accuracy, susceptibility to environmental interference, complex structure, high cost, and difficult maintenance. Some devices are not sensitive enough in controlling the start and stop of related equipment, resulting in inaccurate control, which in turn affects production efficiency or causes waste of resources. At the same time, traditional liquid level gauges are difficult to align vertically with the liquid surface quickly during installation, have poor adaptability to sudden changes in liquid level, are prone to false signal triggering due to vibration of the connecting rope, and lack flexible adaptability to liquids of different densities and viscosities, failing to meet the stable measurement requirements under diverse working conditions.

[0004] To address the aforementioned technical shortcomings, a solution is proposed that improves the accuracy of liquid level measurement and ease of installation by adapting the density of glass microspheres filled in the lower float and autonomously aligning the omnidirectional ball, combined with the stable pulling force generated by the density difference between the two floats. Furthermore, the elastic buffer structure composed of the sliding rod and spring inside the lower float effectively absorbs the impact force generated by sudden changes in liquid level, preventing the connecting rope from shaking and signal mis-triggered, thus enhancing the device's adaptability to complex working conditions. Summary of the Invention

[0005] The purpose of this invention is to provide a remote liquid level gauge device that links a float and a fixed pulley, in order to solve the aforementioned technical defects.

[0006] The objective of this invention can be achieved through the following technical solution: a remote liquid level gauge device with linkage between a float and a fixed pulley, comprising a fixed plate, and an upper support plate and a lower support plate located below the fixed plate, wherein two sets of symmetrically distributed support rods are fixedly connected between the upper support plate and the lower support plate, and an upper float and a lower float are slidably connected to the two sets of support rods respectively, and an upper fixed pulley and a lower fixed pulley are rotatably arranged on opposite sides of the upper support plate and the lower support plate respectively; The upper and lower floats are connected by a connecting rope guided by the upper and lower fixed pulleys. A toothed plate is slidably installed on the upper support plate, and a trapezoidal block is fixedly connected to the toothed plate. A limit switch is fixedly connected to the bottom of the upper support plate through a fixed plate.

[0007] Preferably, a U-shaped frame is fixedly connected to both the upper support plate and the lower support plate, the upper fixed pulley and the lower fixed pulley are rotatably connected to the corresponding U-shaped frame, and U-shaped seats are symmetrically fixedly connected to both sides of the U-shaped frame, and two sets of balls that abut against the connecting rope are rolled and embedded on the inner wall of the U-shaped seat.

[0008] Preferably, a small gear is provided on the axle of the upper fixed pulley, a large gear that meshes with the small gear and the toothed plate is rotatably connected to the U-shaped frame, a convex groove is provided at the bottom of the upper support plate, and a convex slider that is slidably connected to the convex groove is fixedly connected to the toothed plate.

[0009] Preferably, a rotating disk that is rotatably connected to the axle of the upper fixed pulley is fixedly connected to the pinion, and the rotating disk is threadedly connected to a bolt through an ear plate. A number of limiting holes arranged in a circular array are provided on one side of the pinion.

[0010] Preferably, one end of the connecting rope is fixedly connected to the bottom of the upper float, and the other end of the connecting rope is fixedly connected to a slide rod that is slidably connected to the lower float. A movable block is fixedly connected to the free end of the slide rod. An movable cavity that is slidably connected to the movable block is opened inside the lower float. A spring is fixedly connected between the top of the movable block and the inner wall of the movable cavity and located outside the slide rod.

[0011] Preferably, the upper float is injection molded from polyethylene material, and its interior is hollow and filled with low-density foam material. The lower float is made of corrosion-resistant metal material, and a filling cavity penetrating one side of the lower float is opened inside the lower float. The cavity opening is fitted with a cavity cover, and the filling cavity is filled with glass microspheres.

[0012] Preferably, the top of the upper support plate is fixedly connected to a universal ball via a support column, and a fixing ring is provided at the bottom of the fixing plate and on the outside of the support column. The bottom of the fixing plate and the top of the fixing ring are provided with spherical grooves that are adapted to the universal ball. The fixing ring is fixedly connected to the fixing plate by multiple bolts.

[0013] The beneficial effects of this invention are as follows: (1) The lower float of this invention achieves precise matching with the density of the liquid by filling it with glass microspheres, so that it can move smoothly and synchronously with the liquid level. The upper float, which has a slightly lower density, responds to the liquid level change first. The stable tension formed by the density difference between the two ensures that the connecting rope is always taut, so as to provide precise transmission displacement of the fixed pulley and ensure the accuracy of liquid level measurement. When the liquid level changes suddenly, the sliding rod and spring inside the lower float form an elastic buffer structure, which quickly absorbs the impact force transmitted by the upper float and avoids the fixed pulley from spinning freely or the limit switch from being triggered erroneously due to the shaking of the connecting rope. Through the linkage of density adaptation to ensure stable measurement and elastic buffer to cope with sudden changes, the conventional device can accurately sense the stable liquid level, while making up for the adaptive adjustment of the liquid level change, thereby achieving stable measurement under different working conditions.

[0014] (2) The upper fixed pulley of the present invention rotates synchronously with the movement of the connecting rope. The torque is amplified by the meshing transmission of the small gear and the large gear, which drives the tooth plate to carry the trapezoidal block to accurately trigger the limit switch, converting the mechanical displacement into a control signal, and realizing the linkage between the liquid level and the equipment action. At the same time, the independent rotation of the upper fixed pulley realizes the adjustment of the initial position of the upper float and the lower float, thereby realizing the detection and processing of liquid levels at different heights and improving the applicability of the device. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram showing the disassembled shape of the universal ball of the present invention; Figure 3 This is a schematic diagram of the fit between the pinion, gear, and gear plate of the present invention; Figure 4 This is a schematic diagram of the structure of the lower fixed pulley of the present invention; Figure 5 This is a schematic diagram of the structure of the fixed pulley of the present invention; Figure 6 This is a schematic diagram of the connection between the upper and lower floats of the present invention; Figure 7 This is a schematic diagram showing the positions of the upper and lower floats when the liquid level rises according to the present invention.

[0016] Legend: 1. Fixing plate; 11. Universal ball joint; 12. Fixing ring; 13. Spherical groove; 2. Upper support plate; 21. Lower support plate; 22. Support rod; 23. Upper float; 24. Lower float; 25. Upper fixed pulley; 26. Lower fixed pulley; 27. Connecting rope; 28. Toothed plate; 29. ​​Trapezoidal block; 210. Limit switch; 211. U-shaped frame; 212. U-shaped seat; 213. Ball bearing; 214. Small gear; 215. Large gear; 216. Rotating disk; 217. Slide rod; 218. Spring; 219. Filling cavity. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: Please refer to Figure 1 and Figures 3-7 As shown, the lack of flexible adaptability to liquids of different densities and viscosities, which fails to meet the stable measurement requirements under diverse working conditions, can be solved by the following solutions; This embodiment of a remote liquid level gauge device with linkage between float and fixed pulley includes a fixed plate 1, and an upper support plate 2 and a lower support plate 21 located below the fixed plate 1. The upper support plate 2 and the lower support plate 21 are respectively used for the installation of the upper fixed pulley 25 and the lower fixed pulley 26. Two sets of symmetrically distributed support rods 22 are fixedly connected between the upper support plate 2 and the lower support plate 21. The support rods 22 are not only used for the connection between the upper support plate 2 and the lower support plate 21, but also for the stable lifting and sliding of the upper float 23 and the lower float 24. The upper float 23 and the lower float 24 are slidably connected on the two sets of support rods 22 respectively. The upper fixed pulley 25 and the lower fixed pulley 26 are rotatably arranged on the opposite sides of the upper support plate 2 and the lower support plate 21 respectively. A connecting rope 27, guided by an upper fixed pulley 25 and a lower fixed pulley 26, connects the upper float 23 and the lower float 24. The lower float 24 is placed below the liquid surface, while the upper float 23 floats on the liquid surface. When the liquid level in the container rises steadily, the upper float 23, due to its slightly lower density, responds to the liquid level change first. The stable tension formed by the density difference between the two ensures that the connecting rope 27 is taut. Combined with the guidance of the upper fixed pulley 25 and the lower fixed pulley 26, this ensures the accuracy of liquid level sensing. A toothed plate 28 is slidably mounted on the upper support plate 2, and a trapezoidal block 29 is fixedly connected to the toothed plate 28. A limit switch 210 is fixedly connected to the bottom of the upper support plate 2 via a fixing plate 1. When the liquid level in the container is too high, the toothed plate 28 moves with the trapezoidal block 29, which in turn causes the trapezoidal block 29 to push the plunger rod of the limit switch 210, triggering the limit switch 210. The limit switch 210 transmits a signal to the control circuit to control the relevant equipment to perform corresponding actions, such as starting a drain pump to extract excess liquid from the container.

[0019] U-shaped frames 211 are fixedly connected to both the upper support plate 2 and the lower support plate 21. The upper fixed pulley 25 and the lower fixed pulley 26 are rotatably connected to the corresponding U-shaped frames 211. U-shaped seats 212 are symmetrically fixedly connected to both sides of the U-shaped frames 211. Two sets of balls 213 that abut against the connecting rope 27 are rolled and embedded on the inner wall of the U-shaped seat 212. The U-shaped seat 212 and the balls 213 reduce the transmission resistance of the connecting rope 27, ensure the smoothness of mechanical transmission, and prevent the connecting rope 27 from separating from the upper fixed pulley 25 or the lower fixed pulley 26. This ensures that the connecting rope 27 is tightly attached to the upper fixed pulley 25, which promotes the effective rotation of the upper fixed pulley 25.

[0020] A small gear 214 is installed on the axle of the upper fixed pulley 25. A large gear 215 that meshes with the small gear 214 and the toothed plate 28 is rotatably connected to the U-shaped frame 211. The upper fixed pulley 25 rotates synchronously with the movement of the connecting rope 27. The torque is amplified by the meshing of the small gear 214 and the large gear 215, which drives the toothed plate 28 to carry the trapezoidal block 29 to precisely trigger the limit switch 210, converting the mechanical displacement into a control signal, and realizing the linkage between the liquid level and the equipment action. The bottom of the upper support plate 2 is provided with a convex sliding groove. A convex slider that is slidably connected to the toothed plate 28 is fixedly connected to the convex sliding groove. The convex slider on the toothed plate 28 and the convex sliding groove of the upper support plate 2 form a sliding limit engagement, which can limit the excessive translation of the toothed plate 28, avoid the problem that the plunger rod of the limit switch 210 is separated from the trapezoidal block 29 after being guided by the inclined side of the trapezoidal block 29 and cannot be reset, and avoid the problem that the lower float 24 continues to descend when the liquid level decreases, causing the toothed plate 28 to separate from the large gear 215.

[0021] A rotating disk 216, which is rotatably connected to a pinion 214, is fixedly connected to the axle of the upper fixed pulley 25. The rotating disk 216 is connected to a bolt via a threaded ear plate. Several limiting holes arranged in a circular array are provided on one side of the pinion 214. After the bolt is separated from the corresponding limiting hole, the upper fixed pulley 25 is rotated to adjust the initial position of the upper float 23 and the lower float 24. Then, the end of the bolt is inserted into the corresponding limiting hole, so that the upper fixed pulley 25 can rotate independently, thereby adjusting the initial position of the upper float 23 and the lower float 24. This enables the detection and processing of liquid levels at different heights, thus expanding the applicability of the device.

[0022] The upper float 23 is injection molded from polyethylene material. It is hollow inside and filled with low-density foam material to ensure that the upper float 23 floats on the liquid surface. The lower float 24 is made of corrosion-resistant metal material. The lower float 24 has a filling cavity 219 that runs through one side of the lower float 24. The cavity opening of the filling cavity 219 is fitted with a cavity cover. The filling cavity 219 is filled with glass microspheres. The required weight of the lower float 24 is obtained by multiplying the density of the liquid in the container by the volume of the lower float 24. Then, glass microspheres are filled into the filling cavity 219 of the lower float 24 so that the density of the lower float 24 is the same as the density of the liquid, so that the lower float 24 is placed below the liquid surface, and the density of the lower float 24 is consistent with that of the liquid. The lower float 24 moves synchronously with the liquid level, while the upper float 23, due to its slightly lower density, responds first to changes in the liquid level. The stable tension formed by the density difference between the two ensures that the connecting rope 27 is always taut. The upper float 23 and the lower float 24 work together to achieve accurate liquid level sensing. For liquids of different viscosities, such as engine oil and aqueous solutions, the density difference between the upper float 23 and the lower float 24 can automatically adjust the tension. The higher the viscosity, the greater the liquid resistance experienced by the float. The tension generated by the density difference can offset some of the resistance and maintain the stability of the float's lifting and lowering response speed.

[0023] Example 2: Please refer to Figure 2 and Figure 6 As shown, the following solutions can be used to address the problems of level gauges being difficult to align vertically with the liquid surface quickly during installation, having poor adaptability to sudden changes in liquid level, and being prone to false signal triggering due to vibration of the connecting rope. In this embodiment, one end of the connecting rope 27 is fixedly connected to the bottom of the upper float 23, and the other end of the connecting rope 27 is fixedly connected to a slide rod 217 that is slidably connected to the lower float 24. A movable block is fixedly connected to the free end of the slide rod 217. An movable cavity that is slidably connected to the movable block is opened inside the lower float 24. A spring 218 is fixedly connected between the top of the movable block and the inner wall of the movable cavity and located outside the slide rod 217. When the liquid level changes suddenly, such as when liquid is poured in or discharged instantaneously, the impact force generated by the rapid rise and fall of the upper float 23 is transmitted to the slide bar 217 of the lower float 24 through the connecting rope 27. The slide bar 217 compresses or stretches the spring 218, and the impact energy is absorbed by the deformation of the spring 218. This prevents the fixed pulley from spinning freely or the limit switch 210 from being accidentally triggered due to violent shaking of the connecting rope 27. This allows the conventional device to accurately sense the stable liquid level while making up for the adaptive adjustment of the liquid level in case of sudden changes, thus achieving stable measurement under different working conditions.

[0024] The top of the upper support plate 2 is fixedly connected to a universal ball 11 via a support column. A fixing ring 12 is provided at the bottom of the fixing plate 1 and on the outside of the support column. A spherical groove 13 adapted to the universal ball 11 is opened at the bottom of the fixing plate 1 and the top of the fixing ring 12. The fixing plate 1 is installed at the top of the liquid container. Through the movable connection between the universal ball 11 and the spherical groove 13, combined with the self-weight of the upper support plate 2 and the structure below it, the upper support plate 2 and the lower support plate 21 are set vertically relative to the liquid surface, ensuring the accuracy of the test results. The fixing ring 12 is fixedly connected to the fixing plate 1 by multiple bolts. Rotating the bolts on the fixing ring 12 drives the fixing ring 12 to move upward and fix the universal ball 11.

[0025] Example 3: Please refer to Figures 1-7 As shown, the present invention also proposes a method for using a remote liquid level gauge device that links a float and a fixed pulley, comprising the following steps: Step 1: The fixing plate 1 is installed on the top of the liquid container and is connected to the spherical groove 13 through the universal ball 11. Combined with the weight of the upper support plate 2 and the structure below it, the upper support plate 2 and the lower support plate 21 are set vertically relative to the liquid surface. Then, the bolt on the fixing ring 12 is rotated to drive the fixing ring 12 to move upward and fix the universal ball 11. Step 2: Based on the product of the liquid density in the container and the volume of the lower float 24, the required weight of the lower float 24 is obtained. Then, glass microspheres are filled into the filling cavity 219 of the lower float 24, so that the density of the lower float 24 is the same as that of the liquid. The lower float 24 is placed below the liquid surface, and the upper float 23 floats on the liquid surface. When the liquid level in the container rises steadily, the upper float 23, due to its lower density, rises first. Through the connecting rope 27 combined with the guidance of the upper fixed pulley 25 and the lower fixed pulley 26, the lower float 24 is pulled to rise synchronously. Since the density of the lower float 24 is the same as that of the liquid, the lower float 24 moves synchronously with the liquid level. The upper float 23 and the lower float 24 work together to achieve accurate liquid level sensing. Step 3: The tight fit between the connecting rope 27 and the fixed pulley causes the upper fixed pulley 25 to rotate synchronously. Through the meshing transmission of the small gear 214, the large gear 215 and the toothed plate 28, the toothed plate 28 carries the trapezoidal block 29 to move. This causes the trapezoidal block 29 to push the plunger rod of the limit switch 210, triggering the limit switch 210. The limit switch 210 transmits a signal to the control circuit to control the relevant equipment to perform corresponding actions, such as starting the drain pump to extract excess liquid from the container. The other side of the convex slider abuts against the convex groove to limit the excessive translation of the toothed plate 28. When the liquid is discharged, as the liquid level drops, the lower float 24 drops synchronously with the liquid level, and the upper float 23 drops synchronously with the liquid level height. Step 4: When the liquid level changes suddenly, such as when liquid is poured in or discharged instantaneously, the impact force generated by the rapid rise and fall of the upper float 23 is transmitted to the slide bar 217 of the lower float 24 through the connecting rope 27. The slide bar 217 compresses or stretches the spring 218, and the impact energy is absorbed by the deformation of the spring 218, so as to avoid the connecting rope 27 shaking violently, causing the fixed pulley to spin freely or the limit switch 210 to be falsely triggered. For liquids of different viscosities, such as engine oil and aqueous solution, the density difference between the upper float 23 and the lower float 24 can automatically adjust the pulling force. The higher the viscosity, the greater the liquid resistance on the float. The pulling force generated by the density difference can offset part of the resistance and maintain the stability of the float's rise and fall response speed.

[0026] 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 remote liquid level gauge device with a float and a fixed pulley linkage, comprising a fixed plate (1), and an upper support plate (2) and a lower support plate (21) located below the fixed plate (1), characterized in that, Two sets of symmetrically distributed support rods (22) are fixedly connected between the upper support plate (2) and the lower support plate (21). The upper float (23) and the lower float (24) are slidably connected on the two sets of support rods (22). The upper fixed pulley (25) and the lower fixed pulley (26) are rotatably arranged on the opposite sides of the upper support plate (2) and the lower support plate (21). A connecting rope (27) guided by an upper fixed pulley (25) and a lower fixed pulley (26) is connected between the upper float (23) and the lower float (24). A toothed plate (28) is slidably installed on the upper support plate (2). A trapezoidal block (29) is fixedly connected to the toothed plate (28). A limit switch (210) is fixedly connected to the bottom of the upper support plate (2) through a fixing plate (1).

2. The remote liquid level gauge device with float and fixed pulley linkage according to claim 1, characterized in that, U-shaped frames (211) are fixedly connected to both the upper support plate (2) and the lower support plate (21). The upper fixed pulley (25) and the lower fixed pulley (26) are rotatably connected to the corresponding U-shaped frames (211). U-shaped seats (212) are symmetrically fixedly connected to both sides of the U-shaped frame (211), and two sets of ball bearings (213) that abut against the connecting rope (27) are rolled and embedded on the inner wall of the U-shaped seat (212).

3. The remote level gauge device with float and fixed pulley linkage according to claim 1, characterized in that, The upper fixed pulley (25) has a small gear (214) on its axle. The U-shaped frame (211) is rotatably connected to a large gear (215) that meshes with the small gear (214) and the toothed plate (28). The bottom of the upper support plate (2) is provided with a convex sliding groove. The toothed plate (28) is fixedly connected to a convex slider that is slidably connected to the convex sliding groove.

4. The remote liquid level gauge device with float and fixed pulley linkage according to claim 3, characterized in that, The upper fixed pulley (25) has a rotating disk (216) that is rotatably connected to the pinion (214) on its axle. The rotating disk (216) is connected to a bolt by a lug thread. A number of limiting holes arranged in a ring array are provided on one side of the pinion (214).

5. The remote level gauge device with float and fixed pulley linkage according to claim 1, characterized in that, One end of the connecting rope (27) is fixedly connected to the bottom of the upper float (23), and the other end of the connecting rope (27) is fixedly connected to a slide rod (217) that is slidably connected to the lower float (24). A movable block is fixedly connected to the free end of the slide rod (217). An movable cavity that is slidably connected to the movable block is opened inside the lower float (24). A spring (218) is fixedly connected between the top of the movable block and the inner wall of the movable cavity and located outside the slide rod (217).

6. The remote liquid level gauge device with float and fixed pulley linkage according to claim 1, characterized in that, The upper float (23) is injection molded from polyethylene material, and its interior is hollow and filled with low-density foam material. The lower float (24) is made of corrosion-resistant metal material. The lower float (24) has a filling cavity (219) that runs through one side of the lower float (24), and the cavity opening of the filling cavity (219) is fitted with a cavity cover. The filling cavity (219) is filled with glass microspheres.

7. A remote level gauge device with a float and a fixed pulley linkage according to claim 1, characterized in that, The top of the upper support plate (2) is fixedly connected to a universal ball (11) by a support column. The bottom of the fixed plate (1) and the outside of the support column are provided with a fixing ring (12). The bottom of the fixed plate (1) and the top of the fixing ring (12) are provided with a spherical groove (13) that is adapted to the universal ball (11). The fixing ring (12) is fixedly connected to the fixed plate (1) by multiple bolts.

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