A high-precision float-type water level measuring device and method without a counterweight

Abstract

This invention relates to the field of water level measurement technology and discloses a high-precision float-type water level measuring device and method without a counterweight. The measuring device includes a wheel and an encoder, with the encoder coaxially connected to the wheel. A steel wire rope is wound around the outer side of the wheel, and the other end of the steel wire rope is connected to a float, which hangs naturally. A constant torque section is coaxially connected to the wheel and includes a motor and a support component connected to the motor and the wheel. The drive end of the motor is connected to the wheel. This invention uses a motor with a suitable torque range to replace the counterweight, keeping it precisely at that torque to achieve effective balance of the float. This allows the float to complete high-precision water level measurement without relying on the counterweight, avoiding entanglement between the steel wire rope suspending the counterweight and the steel wire rope suspending the float, and preventing the counterweight from rubbing and colliding with the inner wall of the well, as well as preventing underestimation and large measurement errors. This improves the accuracy and stability of the measurement.

Description

Technical Field

[0001] This invention relates to the field of float-type water level measurement technology, specifically to a high-precision float-type water level measurement device and method without a counterweight. Background Technology

[0002] Float-type water level gauges are widely praised for their many advantages, such as stable measurement and high accuracy. Float-type water level gauges come in various specifications and styles, but their principle is the same. They all use a series of mechanical structures to accurately convert the vertical movement of the water surface into circular motion, and then use the accurate measurement of the circular motion to infer the vertical fluctuation of the water surface. Typically, a combination of a counterweight wheel, a float wheel, a counterweight, and a float is used. When the water is still, the float's weight minus the displacement equals the counterweight's weight, and the float and counterweight are in equilibrium. The difference between the float's weight and the displacement is called the float's effective weight, and the float's draft in a steady state is called its inherent draft. When the water level rises, the float's draft increases, the displacement increases, and the float's effective weight decreases. This decreases the reverse pulling force on the counterweight, causing the counterweight to move downwards. The wheel rotates clockwise, thus moving the float upwards. After the float moves upwards, its draft decreases, and the displacement... As the volume decreases, the equivalent weight increases. When the equivalent weight of the float equals the weight of the counterweight again, the float and counterweight reach equilibrium once more. At this point, the float's draft returns to its inherent draft. The height of the water level rise can be obtained by multiplying the angle the wheel rotates forward by the wheel diameter. When the water level drops, the entire process is exactly the opposite. Eventually, the float's draft returns to its inherent draft again, and the height of the water level drop can be obtained by multiplying the angle the wheel rotates backward by the wheel diameter. Although the float-type water level gauge is a relatively successful device, many detailed problems still exist in its practical application.

[0003] For example, there is a possibility that the steel wire rope suspending the weight and the steel wire rope suspending the float will become entangled. If the wave damping effect of the float well is poor, or if the waves are too large, the float will inevitably sway severely. Because the two steel wire ropes are too close together, there is a great risk of entanglement. Once the two steel wire ropes become entangled, the entire mechanical structure of the float-type water level gauge will be damaged, making it impossible to perform normal measurements. Furthermore, there is a possibility that the weight may fall into the water or rub against the inner wall of the well, affecting the measured values. Summary of the Invention

[0004] This invention provides a high-precision float-type water level measuring device without a counterweight. By eliminating the counterweight, the problem of the counterweight entering the water or rubbing against the well wall of the water being measured, which easily affects the measurement value, is solved.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: Firstly, a high-precision float-type water level measuring device without a counterweight includes a wheel and an encoder, the encoder being coaxially connected to the wheel, a steel wire rope being wound around the outer side of the wheel, one end of the steel wire rope being fixedly connected to the wheel, and the other end of the steel wire rope being connected to a float, the float being naturally suspended, and further comprising: A constant torque unit, coaxially connected to the wheel, provides a constant torque. The constant torque unit includes a motor for replacing the counterweight, and a support member connected to the motor and the wheel. The drive end of the motor is connected to the wheel to drive the wheel to rotate in the forward direction or be driven by the wheel to rotate in the reverse direction. The float protection part is movably disposed on the outside of the wire rope and located above the float, covering the float. The float protection part includes a protective member disposed on the outside of the float and a float support member movably disposed on the outside of the wire rope. The protective member and the float support member are rotatably connected, and the float support member is located on the outside of the protective member to prevent the float from rubbing against it. The cleaning section is installed on the float protection section. The cleaning section includes a cleaning element that penetrates the protective member and a spraying element that is installed on the float support member. The spraying element is connected to the cleaning element to clean the float after it has been collected.

[0006] Furthermore, the supporting element includes: A support frame is installed on one side of the wheel; The bracket is located on the other side of the roulette wheel; The opening is created through the support frame and bracket; The bearings are symmetrically fixed inside the opening.

[0007] Furthermore, the constant torque component also includes: The rotating shaft is installed through the bearing and through the wheel, and is fixedly connected to the wheel; The motor is fixed to the side of the support frame away from the wheel disc; The drive end of the motor is connected to one end of the rotating shaft to provide balancing torque to the wheel and the float; The torque of the motor is 0-3 N·m.

[0008] Furthermore, the protective member includes: The protective plates are multiple and evenly and symmetrically arranged on the outside of the float, and have a diamond-shaped structure with arc-shaped bends. The opening is located at the top of the guard plate; The rotating rod is located inside the movable opening and is fixedly connected to the guard plate; The connecting plate is rotatably mounted on the outside of the rotating rod.

[0009] Furthermore, the floating support includes: The U-shaped tray is rotatably positioned on the outside of the wire rope and above the guard plate; The upper end of the connecting plate is fixedly connected to the U-shaped tray; The buoyancy-enhancing components are located at the curved bends of the protective plate.

[0010] Furthermore, the buoyancy-enhancing component includes: The connecting block is fixed to the outside of the guard plate and located at the arc-shaped bend of the guard plate; The float is fixed to the lower end of the connecting block; The buoy tilts away from the center of the float.

[0011] Furthermore, the adhesive patch includes: Support tube, through-plate setting; Sleeve plate, through-bracing tube configuration; The cotton brush is located on the inside of the sleeve plate, with one end extending through the sleeve plate into the support cylinder. A handle is provided on the side of the plate away from the float.

[0012] Furthermore, the pressurized spraying component includes: The storage bladder is fixed to the upper end of the U-shaped tray; The reservoir and the U-shaped tray form a cavity to allow it to float on the water surface; A threaded tube is installed through the upper end of the reservoir. Threaded cap, threaded connection to the upper end of a threaded pipe; Injection spray parts, with through-plate design.

[0013] Furthermore, the injection component includes: The inner cavity is located inside the sleeve plate; The tube has one end penetrating the reservoir and the other end penetrating the upper part of the sleeve and communicating with the inner cavity; The perforation is multiple and evenly distributed through the sleeve plate, with one end connected to the inner cavity and the other end connected to the cotton brush. The clearance groove is opened through the upper end of the support cylinder and corresponds to the position of the pipe.

[0014] Secondly, a high-precision float-type water level measurement method without a counterweight is provided, applied in the high-precision float-type water level measurement device without a counterweight as described in any one of claims, wherein the float-type water level measurement method includes: Set the motor torque to balance the equivalent weight of the float with the motor torque, so that the float remains at its inherent draft depth. When the water level rises, the float's draft increases, the volume of water displaced increases, the float's equivalent weight decreases, the reverse pull on the motor decreases, the motor drives the float wheel to rotate forward, causing the float to move upward until the float's equivalent weight is balanced with the motor's torque again, and the float returns to its inherent draft. The angle of the float wheel's forward rotation is collected by the encoder, and the water level rise is calculated. When the water level drops, the float's draft decreases, the volume of water it displaces decreases, and the float's equivalent weight increases. This increases the reverse pulling force on the motor, causing the motor to drive the float wheel to rotate in the opposite direction. The float then descends until the float's equivalent weight is balanced with the motor's torque again, at which point the float returns to its inherent draft. The angle of the float wheel's reverse rotation is collected by an encoder, and the water level drop is calculated.

[0015] The above-described solution of the present invention has at least the following beneficial effects: By replacing the counterweight with a motor of suitable torque range and setting it to precisely maintain that torque, the float is effectively balanced. This allows the float to perform high-precision water level measurements without relying on the counterweight. This avoids entanglement between the steel cables suspending the counterweight and the float, and prevents the counterweight from rubbing against the well wall. It also prevents the float from rising above the expected water level during floods, which would cause the counterweight to fall below the lower limit. Once the counterweight enters the water, its own water displacement offsets some of its weight, inevitably causing the float to rise deeper and resulting in lower measured data and larger measurement errors. This improves the accuracy and stability of the measurement. Attached Figure Description

[0016] Figure 1 A perspective view of the motor, wheel, and float assembly provided in an embodiment of the present invention; Figure 2 A perspective view of the motor, wheel, and float assembly provided in an embodiment of the present invention; Figure 3 This is an overall perspective view of the float-type water level measuring device provided in an embodiment of the present invention; Figure 4 A perspective view of the protective plate provided in an embodiment of the present invention; Figure 5 A cross-sectional plan view of the combination of guard plate, float and support cylinder provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 5 Schematic diagram of the structure at point A in the diagram; Figure 7 Provided for embodiments of the present invention Figure 5 The structural diagram at point B in the diagram.

[0017] Explanation of reference numerals in the attached figures: In the diagram: 1. Support frame; 2. Bracket; 3. Fixed hole; 4. Through port; 5. Bearing; 6. Shaft; 7. Wheel; 8. Encoder; 9. Interface; 10. Wire rope; 11. Float; 12. Motor; 13. Junction box; 14. U-shaped tray; 15. Protective plate; 16. Movable port; 17. Rotating rod; 18. Connecting plate; 19. Connecting block; 20. Float; 21. Storage bladder; 22. Pipeline; 23. Support cylinder; 24. Relief groove; 25. Sleeve plate; 26. Cotton brush; 27. Inner cavity; 28. Perforation; 29. ​​Threaded pipe; 30. Threaded cap; 31. Handle. Detailed Implementation

[0018] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0019] like Figures 1 to 7 As shown, an embodiment of the present invention provides a high-precision float-type water level measuring device without a counterweight, including a wheel 7 and an encoder 8. The encoder 8 is coaxially connected to the wheel 7. A steel wire rope 10 is wound around the outer side of the wheel 7, and one end of the steel wire rope 10 is fixedly connected to the wheel 7. The other end of the steel wire rope 10 is connected to a float 11, which hangs naturally. The device also includes: The constant torque section is coaxially connected to the wheel 7 to provide a constant torque. The constant torque section includes a motor 12 for replacing the counterweight, and a support member connected to the motor 12 and the wheel 7. The drive end of the motor 12 is connected to the wheel 7 to drive the wheel 7 to rotate in the forward direction or be driven by the wheel 7 to rotate in the reverse direction; The float guard is movably disposed on the outside of the wire rope 10 and above the float 11, covering the float 11. The float guard includes a baffle disposed on the outside of the float 11 and a float support disposed on the outside of the wire rope 10. The baffle and the float support are rotatably connected, and the float support is located on the outside of the baffle to prevent the float 11 from being entangled by impurities in the water. The cleaning section is installed on the float protection section. The cleaning section includes a cleaning element that penetrates the protective element and a spraying element that is installed on the float support. The spraying element is connected to the cleaning element to clean the float 11 after it is retrieved.

[0020] Specifically, the encoder 8 is connected to an interface 9 at its lower end, and the motor 12 is connected to a junction box 13.

[0021] The motor 12 can drive the wheel 7 to rotate using the drive end, providing torque to the wheel 7. The wheel 7 can provide support and winding space for the wire rope 10. The wire rope 10 can provide support for the float 11 under the support of the wheel 7. The float 11 can float on the water surface using buoyancy. The encoder 8 can convert the mechanical displacement of the float 11 with the water level change into a digital electrical signal that can be recognized by the instrument, realizing accurate measurement and output of the water level. The operator can connect the wire connected to the motor 12 through the junction box 13, and can connect the line connected to the encoder 8 through the interface 9.

[0022] In practical application, the operator can control the motor 12 to rotate according to actual needs, causing the motor 12 to drive the wheel 7 to release the wound wire rope 10. Under the action of gravity, the float 11 pulls the wire rope 10 downward, allowing the float 11 to be lowered into the liquid being measured. The float 11 will then float on the water surface using the buoyancy of the liquid. After the float 11 floats on the water surface, the motor 12 will rotate in the opposite direction to adjust the torque, so that the weight of the wheel 7 and the float 11 works together to tighten the taut wire rope 10 and maintain the float 11 at its inherent draft. At the same time, the encoder 8 will convert the mechanical displacement of the float 11 with the water level change into a digital electrical signal that can be recognized by the instrument, thereby realizing the water level measurement.

[0023] In a preferred embodiment of the present invention, the support member includes: Support 1 is located on one side of the wheel 7; Support 2 is located on the other side of the wheel 7; Opening 4 is made through support 1 and bracket 2; Bearing 5 is symmetrically fixed inside the opening 4.

[0024] Specifically, the bottom of the support frame 1 and the bracket 2 are symmetrically provided with fixing holes 3. The support frame 1 and the bracket 2 can be installed above the water surface at the working location using the fixing components and fixing holes 3. The support frame 1 and the bracket 2 can provide space for the opening 4. The opening 4 can provide installation space for the bearing 5. The bearing 5 can provide rotational support for the rotating shaft 6 under the support of the support frame 1 and the bracket 2.

[0025] The constant torque section also includes: A rotating shaft 6 is installed through the bearing 5 and through the wheel 7, and is fixedly connected to the wheel 7; The motor 12 is fixed to the side of the support frame 1 away from the wheel 7; The drive end of the motor 12 is connected to one end of the rotating shaft 6 to provide balancing torque to the wheel 7 and the float 11; The torque of motor 12 is 0-3 N.m.

[0026] Specifically, the rotating shaft 6 can transmit the rotational power of the motor 12 to the wheel 7 and the encoder 8, the support frame 1 can provide stable support for the motor 12, the motor 12 can drive the rotating shaft 6 to rotate using its drive end, the rotating shaft 6 can provide support for the wheel 7 and can drive the wheel 7 to rotate.

[0027] In practical application, after the motor 12 starts, it will drive the rotating shaft 6 to rotate under the support of the bearing 5 by the drive end under the support of the support frame 1. The rotating shaft 6 can drive the wheel 7 to rotate forward or backward. Since the float 11 and the wheel 7 are precision machined, the weight and torque of the float 11 are also precisely known, and the draft of the float 11 can also be precisely designed. Based on the above conditions, the torque of the motor 12 can be accurately calculated. The motor 12 with a suitable torque range can be selected and set to keep it precisely at that torque. As long as the motor 12 can maintain a constant torque at all times, it can completely replace the effect of the counterweight and achieve effective balance of the float 11.

[0028] The following embodiments calculate the torque of motor 12 and the required torque accuracy: If the diameter of the float 11 disc 7 is 0.1m, the float 11 is a flat cylinder with a radius of 0.1m and a height of 0.08m, the float 11 is made of polypropylene plastic with a density of 920kg / m3, and the draft of the float 11 is 0.03±0.001m. The accuracy of the draft of the float 11 determines the accuracy of the water level measurement. The required draft is within 0.03m with a fluctuation of no more than 0.001m, which can ensure that the accuracy of the water level measurement reaches 1mm, thus meeting the two requirements of resolution of 0.1cm and maximum permissible error of 0.3cm.

[0029] When the water surface is still, the formula for calculating the torque of motor 12 is: the weight of float 11 minus the displacement, float 11 is in a balanced state, the weight of float 11 minus the displacement is called the equivalent weight of float 11, and the draft of float 11 in a steady state is called the inherent draft.

[0030] As the water level rises, the draft of float 11 increases, the displacement increases, and the effective weight of float 11 decreases. This is equivalent to a decrease in the reverse pulling force on motor 12. At this time, motor 12 will inevitably drive wheel 7 to rotate clockwise, thereby driving float 11 to move upward. After float 11 moves upward, its draft decreases, its displacement decreases, and its effective weight increases. When the effective weight of float 11 is equal to the torque of motor 12 again, float 11 reaches equilibrium again. At this point, the draft of float 11 returns to its inherent draft, and the height of the water level rise can be obtained by multiplying the angle through which wheel 7 rotates clockwise by the diameter of wheel 7.

[0031] When the water level drops, the draft of float 11 decreases, the displacement decreases, and the effective weight of float 11 increases. This is equal to the increase in the reverse pulling force on motor 12. At this time, motor 12 will inevitably drive wheel 7 to rotate in the opposite direction, thereby driving float 11 to move downward. After float 11 moves downward, its draft increases, its displacement increases, and its effective weight decreases. When the effective weight of float 11 is equal to the torque of motor 12 again, float 11 reaches a balanced state again. Finally, the draft of float 11 returns to its original draft. The height of the water level drop can be obtained by multiplying the angle through which wheel 7 rotates in the opposite direction by the diameter of wheel 7.

[0032] Thus, regardless of how the water level changes, the encoder 8 can effectively measure the changes in the water level. Therefore, in order to maintain the draft of the float 11 at 0.03m, the torque of the motor 12 should be 1.34Nm. In order to maintain the draft of the float 11 at a stable depth of 0.03±0.001m, the torque of the motor 12 needs to be maintained at 1.34±0.03Nm.

[0033] Considering that the motor 12 needs to be used for a long time and there is a possibility that the float 11 may be lifted by the motor 12 in the future, the torque range should be appropriately increased. A motor 12 with a torque range of 0-3 N.m and a torque accuracy of ±2% can meet the requirements. Alternatively, a motor 12 with a small torque can be used in conjunction with a reducer to meet the torque range.

[0034] In a preferred embodiment of the present invention, the guard member includes: The guard plate 15 has multiple plates, which are evenly and symmetrically arranged on the outside of the float 11. It has a rhomboid structure and is provided with arc-shaped turns. The opening 16 is located at the top of the guard plate 15; The rotating rod 17 is set inside the movable opening 16 and is fixedly connected to the guard plate 15; The connecting plate 18 is rotatably mounted on the outside of the rotating rod 17.

[0035] Specifically, the multiple protective plates 15 close under the action of gravity to cover the float 11, thereby providing protection for the float 11 and preventing it from accidentally scraping or bumping against the well wall during its upward or downward movement. The protective plates 15 can also provide space for the movable opening 16, which in turn provides space for the rotating rod 17. The connecting plate 18 provides rotational support for the rotating rod 17, allowing the protective plates 15 to cooperate with the movable opening 16 under the action of external force and the rotating rod 17 to rotate under the support of the connecting plate 18.

[0036] The floating support components include: The U-shaped tray 14 is rotatably positioned on the outside of the wire rope 10 and above the guard plate 15; The upper end of the connecting plate 18 is fixedly connected to the U-shaped tray 14; The expansion component is located at the arc-shaped bend of the guard plate 15.

[0037] Specifically, the U-shaped tray 14 can contact the upper end of the float 11 under the action of gravity, so that the upper end of the float 11 can provide support for the U-shaped tray 14 before contacting the water surface, and the wire rope 10 can provide a guiding function for the movement of the U-shaped tray 14.

[0038] The expansion components include: The connecting block 19 is fixed to the outside of the guard plate 15 and is located at the arc-shaped bend of the guard plate 15. The float 20 is fixed to the lower end of the connecting block 19; The float 20 tilts away from the center of the float 11.

[0039] Specifically, the guard plate 15 can provide stable support for the connecting block 19, and the connecting block 19 can provide stable support for the float 20 under the support of the guard plate 15. The float 20 can float on the water surface and can use buoyancy to push the guard plate 15 to drive the rotating rod 17 to rotate under the support of the connecting plate 18. The float 20 can use its own tilt angle in combination with buoyancy to push the guard plate 15 to rotate away from the center of the float 11.

[0040] In practical application, when the motor 12, in conjunction with the wheel 7, drives the float 11 downwards to the liquid surface, the U-shaped tray 14 and the guard plate 15 will move downwards along with the float 11 under the influence of gravity, contacting the water surface before the float 11. As they continue to move into the water, the lower end of the guard plate 15 will insert into the water, and through the connecting block 19, it will drive the float 20 downwards, so that the float 20 contacts the water surface before the float 11. As they continue to move downwards, the float 20 will use buoyancy and tilt angle to push the guard plate 15 through the connecting block 19, thereby driving the rotating rod 17. Supported by the connecting plate 18, the float rotates away from the center line of the float 11. At the same time, the guard plate 15 will contact the U-shaped tray 14 after rotation and use the buoyancy of the float ball 20 to push the U-shaped tray 14 upward along the wire rope 10, so that the guard plate 15 can be opened and the U-shaped tray 14 can be separated from the float 11. Then the float 11 will contact the water surface and maintain its inherent draft. During the rotation of the guard plate 15, long and thin impurities such as floating weeds in the water will be pushed away from the center of the float 11 to prevent the float 11 from being affected by such impurities and to protect the float 11.

[0041] In a preferred embodiment of the present invention, the adhesive patch includes: Support cylinder 23, penetrating guard plate 15 is installed; Sleeve plate 25, through support tube 23 is set; The cotton brush 26 is located inside the sleeve plate 25, and one end extends through the sleeve plate 25 into the support cylinder 23; A handle 31 is provided on the side of the sleeve plate 25 away from the float 11.

[0042] Specifically, the guard plate 15 provides stable support for the support cylinder 23, the support cylinder 23 can use friction to provide support and guide the movement of the sleeve plate 25, the sleeve plate 25 can provide protection and support for the cotton brush 26, water can pass through the cotton brush 26 under the action of external force, and the cotton brush 26 will absorb water. The handle 31 can facilitate the staff to push or reset the sleeve plate 25.

[0043] The pressurized spray components include: Storage bladder 21 is fixed to the upper end of U-shaped tray 14; The reservoir 21 and the U-shaped tray 14 form a cavity to allow it to float on the water surface; A threaded tube 29 is provided, penetrating the upper end of the reservoir 21; Threaded cap 30 is threadedly connected to the upper end of threaded tube 29; For injection-sprayed parts, a through-plate 25 is provided.

[0044] Specifically, the U-shaped tray 14 can provide stable support for the reservoir 21, which can deform under the action of external force and rebound when the external force is removed. It can cooperate with the U-shaped tray 14 to provide storage space for water and can also provide support for the threaded tube 29. The threaded tube 29 can use the thread action to provide support for the threaded cap 30 and can provide a channel for water or cleaning fluid to be added into the reservoir 21.

[0045] Injection spray components include: The inner cavity 27 is located inside the sleeve plate 25; Pipe 22, one end of which passes through the reservoir 21, and the other end of which passes through the upper end of the sleeve 25 and connects to the inner cavity 27; The perforation 28 has multiple holes, which are evenly opened through the sleeve plate 25. One end is connected to the inner cavity 27, and the other end is connected to the cotton brush 26. The clearance groove 24 is opened through the upper end of the support cylinder 23 and corresponds to the position of the pipe 22.

[0046] Specifically, the sleeve 25 provides space for the inner cavity 27 and the perforation 28, the drain pipe 22 provides a channel for water or cleaning fluid in the reservoir 21 to enter the inner cavity 27, the inner cavity 27 provides a channel for liquid to enter the perforation 28, and the perforation 28 provides a channel for liquid to enter the cotton brush 26. The clearance groove 24 provides space for the drain pipe 22 to move, so that the sleeve 25 can drive the drain pipe 22 to move along the support cylinder 23 under the action of external force.

[0047] In practical application, after the measurement is completed, the operator can control the motor 12 to rotate counterclockwise, driving the wheel 7 to rotate via the shaft 6 to wind up the wire rope 10. This causes the wire rope 10 to move the float 11 upwards, separating the float 11 from the liquid being measured. During this upward movement, the float 11 contacts the U-shaped tray 14 and pushes it upwards. The U-shaped tray 14, through the connecting plate 18 and the rotating rod 17, then moves the protective plate 15 upwards. The protective plate 15, moving upwards, is then subjected to gravity. Rotate the rod 17 downwards towards the center line of the float 11, supported by the connecting plate 18, to reset the float 11, thus protecting it during upward movement. After the float 11 and the protective plate 15 have been reset, the operator can use the threaded action to separate the threaded cover 30 from the threaded tube 29 as needed. Open the threaded tube 29 to inject water or cleaning fluid into the reservoir 21 until it is full. Then, use the threaded action to reset the threaded cover 30 back onto the threaded tube 29. Finally, push the sleeve 25 using the pull handle 31. Under the action of external force, the sleeve 25 moves the cotton brush 26 along the support cylinder 23 towards the float 11, allowing the cotton brush 26 to contact the outer wall of the float 11. Simultaneously, the sleeve 25 moves the pipe 22 within the clearance groove 24. Then, supported by the U-shaped tray 14, the operator needs to press down on the storage bladder 21 to deform it. At the same time, under the constraint of the wire rope 10 and the support of the float 11, the operator needs to continuously push or reciprocate to rotate the storage bladder 21 and the U-shaped tray 14, allowing the U-shaped tray 14 to pass through the connecting plate 18 and the rotating... The rod 17 drives the guard plate 15 to rotate continuously or reciprocate. During the squeezing process, the reservoir 21 uses pressure to evenly inject the water and cleaning fluid stored inside into the cotton brush 26 through the drain pipe 22, inner cavity 27 and perforation 28. Under the action of pressure, the water and cleaning fluid will fill and pass through the cotton brush 26 to contact the outer wall of the float 11. After contacting the float 11, the cotton brush 26 can use the rotational power and friction to wipe and clean the impurities and dirt adhering to the outside of the float 11, which is convenient for the maintenance and cleaning of the float 11 and improves efficiency.

[0048] Secondly, a high-precision float-type water level measurement method without a counterweight, the float-type water level measurement method includes: The torque of motor 12 is set so that the equivalent weight of float 11 is balanced with the torque of motor 12, so that float 11 is kept at its inherent draft depth. When the water level rises, the draft of float 11 increases, the volume of water displaced increases, the equivalent weight of float 11 decreases, the reverse pull on motor 12 decreases, motor 12 drives float 11 wheel 7 to rotate forward, driving float 11 to move upward until the equivalent weight of float 11 is balanced with the torque of motor 12 again, float 11 returns to its inherent draft, and the angle of forward rotation of float 11 wheel 7 is collected by encoder 8 to calculate the water level rise value; When the water level drops, the draft of float 11 decreases, the volume of water displaced decreases, the equivalent weight of float 11 increases, the reverse pull on motor 12 increases, motor 12 drives the float 11 wheel 7 to rotate in the opposite direction, and float 11 drops accordingly until the equivalent weight of float 11 is balanced with the torque of motor 12 again, and float 11 returns to its inherent draft. The angle of the reverse rotation of float 11 wheel 7 is collected by encoder 8, and the water level drop value is calculated.

[0049] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-precision float-type water level measuring device without a counterweight, comprising a wheel and an encoder, the encoder being coaxially connected to the wheel, a steel wire rope being wound around the outer side of the wheel, one end of the steel wire rope being fixedly connected to the wheel, and the other end of the steel wire rope being connected to a float, the float being naturally suspended, characterized in that, Also includes: A constant torque unit, coaxially connected to the wheel, provides a constant torque. The constant torque unit includes a motor for replacing the counterweight, and a support member connected to the motor and the wheel. The drive end of the motor is connected to the wheel to drive the wheel to rotate in the forward direction or be driven by the wheel to rotate in the reverse direction. The float protection part is movably disposed on the outside of the wire rope and located above the float, covering the float. The float protection part includes a protective member disposed on the outside of the float and a float support member movably disposed on the outside of the wire rope. The protective member and the float support member are rotatably connected, and the float support member is located on the outside of the protective member to prevent the float from rubbing against it. The cleaning section is installed on the float protection section. The cleaning section includes a cleaning element that penetrates the protective member and a spraying element that is installed on the float support member. The spraying element is connected to the cleaning element to clean the float after it has been collected.

2. The magnetic field measuring device according to claim 1, characterized in that, The support member includes: A support frame is installed on one side of the wheel; The bracket is located on the other side of the roulette wheel; The opening is created through the support frame and bracket; The bearings are symmetrically fixed inside the opening.

3. The magnetic field measuring device according to claim 2, characterized in that, The constant torque component further includes: The rotating shaft is installed through the bearing and through the wheel, and is fixedly connected to the wheel; The motor is fixed to the side of the support frame away from the wheel disc; The drive end of the motor is connected to one end of the rotating shaft to provide balancing torque to the wheel and the float; The torque of the motor is 0-3 N·m.

4. The magnetic field measuring device according to claim 3, characterized in that, The protective component includes: The protective plates are multiple and evenly and symmetrically arranged on the outside of the float, and have a diamond-shaped structure with arc-shaped bends. The opening is located at the top of the guard plate; The rotating rod is located inside the movable opening and is fixedly connected to the guard plate; The connecting plate is rotatably mounted on the outside of the rotating rod.

5. The magnetic field measuring device according to claim 4, characterized in that, The floating support includes: The U-shaped tray is rotatably positioned on the outside of the wire rope and above the guard plate; The upper end of the connecting plate is fixedly connected to the U-shaped tray; The buoyancy-enhancing components are located at the curved bends of the protective plate.

6. The magnetic field measuring device according to claim 5, characterized in that, The buoyancy-enhancing components include: The connecting block is fixed to the outside of the guard plate and located at the arc-shaped bend of the guard plate; The float is fixed to the lower end of the connecting block; The buoy tilts away from the center of the float.

7. The magnetic field measuring device according to claim 6, characterized in that, The adhesive label includes: Support tube, through-plate setting; Sleeve plate, through-bracing tube configuration; The cotton brush is located on the inside of the sleeve plate, with one end extending through the sleeve plate into the support cylinder. A handle is provided on the side of the plate away from the float.

8. The magnetic field measuring device according to claim 7, characterized in that, The pressurized injection component includes: The storage bladder is fixed to the upper end of the U-shaped tray; The reservoir and the U-shaped tray form a cavity to allow it to float on the water surface; A threaded tube is installed through the upper end of the reservoir. Threaded cap, threaded connection to the upper end of a threaded pipe; Injection spray parts, with through-plate design.

9. The magnetic field measuring device according to claim 8, characterized in that, The injection component includes: The inner cavity is located inside the sleeve plate; The tube has one end penetrating the reservoir and the other end penetrating the upper part of the sleeve and communicating with the inner cavity; The perforation is multiple and evenly distributed through the sleeve plate, with one end connected to the inner cavity and the other end connected to the cotton brush. The clearance groove is opened through the upper end of the support cylinder and corresponds to the position of the pipe.

10. A high-precision float-type water level measurement method without a counterweight, applied in the high-precision float-type water level measurement device without a counterweight as described in any one of claims 1-9, characterized in that, The float-type water level measurement method includes: Set the motor torque to balance the equivalent weight of the float with the motor torque, so that the float remains at its inherent draft depth. When the water level rises, the float's draft increases, the volume of water displaced increases, the float's equivalent weight decreases, the reverse pull on the motor decreases, the motor drives the float wheel to rotate forward, causing the float to move upward until the float's equivalent weight is balanced with the motor's torque again, and the float returns to its inherent draft. The angle of the float wheel's forward rotation is collected by the encoder, and the water level rise is calculated. When the water level drops, the float's draft decreases, the volume of water it displaces decreases, and the float's equivalent weight increases. This increases the reverse pulling force on the motor, causing the motor to drive the float wheel to rotate in the opposite direction. The float then descends until the float's equivalent weight is balanced with the motor's torque again, at which point the float returns to its inherent draft. The angle of the float wheel's reverse rotation is collected by an encoder, and the water level drop is calculated.

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