Tubular liquid level gauge for measuring stratified liquid, annular space liquid
By designing a ring-shaped tubular level gauge and utilizing the combination of a float and a counterweight, the problems of float imbalance and jamming in stratified liquids were solved, achieving high-precision level measurement.
Patent Information
- Application Number
- CN202522460304.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-11-19
AI Technical Summary
Existing magnetostrictive or magnetic float level gauges cannot accurately measure liquids in stratified liquids and annular spaces, and the float is prone to imbalance or jamming, resulting in inaccurate measurements.
A tubular level gauge was designed, which adopts a ring-shaped tube and a float structure. The float is equipped with a magnetic ring and a counterweight. The porous tube and smooth inner wall ensure that the float is stable at the boundary line. The level is measured in combination with a waveguide wire.
Stable movement of the float in stratified liquids and annular spaces was achieved, improving the accuracy and precision of liquid level measurement and avoiding jamming.
Smart Images
Figure CN224681642U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tubular liquid level gauge for measuring stratified liquids and annular liquids, belonging to the field of liquid level gauge technology. Background Technology
[0002] The level of a liquid medium in a container is called the liquid level, and the instrument used to measure the liquid level is called a level gauge. A level gauge is a type of level instrument. Types of level gauges include tuning fork vibrating type, magnetostrictive type, pressure type, ultrasonic type, sonar type, magnetic float type, and radar type.
[0003] Magnetostrictive level gauges are commonly used in level sensors. A float rises and falls with the liquid level, and a permanent magnet is embedded inside the float. Changes in the magnetic field trigger an external detection mechanism. One type utilizes the magnetostrictive effect, where the sensing element generates a mechanical wave (torsional wave) when subjected to a magnetic field. The liquid level is determined by measuring the wave's propagation time. Another type uses a waveguide wire as its sensing element. When subjected to a magnetic field, it generates a mechanical wave (torsional wave), and the liquid level is determined by measuring the wave's propagation time. The working principle is that the magnetic field of the magnetic ring inside the float interacts with the waveguide wire, stimulating the magnetostrictive effect. A current pulse is emitted from one end of the waveguide wire, generating an axial magnetic field. This axial magnetic field superimposes with the radial magnetic field of the float's magnetic ring to form a helical magnetic field, inducing a torsional wave. By measuring the time difference between the pulse emission and the return of the torsional wave, the float position (liquid level height) is calculated with millimeter-level accuracy.
[0004] Most conventional level gauges, such as magnetostrictive or magnetic float gauges, have floats mounted on vertical guide rods that change height as the liquid level rises or falls, making them unsuitable for annular (non-vertical) spaces.
[0005] Meanwhile, in stratified liquids, the density difference between the two liquids is not large, and the float needs to be located at the boundary between the two liquids. At this time, the buoyancy of the floats of conventional level gauges such as magnetostrictive or magnetic floats is too small to overcome the friction. When the float volume is large, it is easy to become unbalanced, which can cause the float to become unbalanced and get stuck during the movement on the guide rod, resulting in inaccurate data and reduced accuracy of the level gauge. Utility Model Content
[0006] In order to solve the above-mentioned technical problems, this utility model provides a tubular liquid level gauge for measuring stratified liquids and annular liquids.
[0007] This utility model solves the above-mentioned technical problems through the following technical solutions:
[0008] This utility model provides a tubular liquid level gauge for measuring stratified liquids and annular liquids, comprising:
[0009] The tube body has an annular structure that is adapted to the annular spatial curvature of the liquid to be tested. The surface of the tube body has several evenly distributed through holes, and the edges of the through holes on the inner wall of the tube body are provided with arc edges. A float ball is provided inside the tube body, and a magnetic ring is provided inside the float ball. A counterweight is fixedly connected to the bottom of the float ball. Screws are threadedly connected to the bottom of the float ball and the counterweight. A sealing ring that fits with the screw is provided at the bottom of the float ball.
[0010] In this technical solution, the top end of the tube is fixedly connected to an end head, and elongated holes are provided on both sides of the tube.
[0011] In this technical solution, a waveguide wire is provided inside the elongated hole, and the waveguide wire is electrically connected to a conductive element inside the end.
[0012] In this technical solution, the tube body is provided with multiple through holes of the same diameter, and the diameter of the through holes is smaller than the diameter of the float.
[0013] In this technical solution, a gap is formed between the float and the inner wall of the tube.
[0014] In this technical solution, the tube body is located inside the layered liquid, and the float is located at the interface of a single liquid surface or at the boundary between two liquids of different densities.
[0015] In this technical solution, the float is composed of two semi-circular annular shells, which are sealed together.
[0016] In this technical solution, the magnetic ring is located in the middle of the float, and a counterweight is provided below the magnetic ring.
[0017] In this technical solution, a cavity for storing media is formed inside the float, and the cavity is connected to the bottom of the float.
[0018] In this technical solution, a sealing ring with an annular structure is embedded at the bottom of the float, and the screw is fitted and connected to the bottom of the counterweight.
[0019] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.
[0020] The positive and progressive effects of this utility model are as follows:
[0021] The tubular level gauge proposed above for measuring stratified liquids and annular liquids uses a combination of a porous tube and a float to achieve liquid level measurement of stratified liquids. The porous tube allows the liquid to enter the tube smoothly and ensures that the liquid level inside and outside the tube is consistent, avoiding affecting the subsequent measurement results. The measuring element is placed on the inner wall of the tube, and the inner wall of the tube is treated to avoid friction that would affect movement, ensuring the stable rise and fall of the float in the tube. The presence of a counterweight ensures that the magnetic ring is horizontal, facilitating accurate measurement by the magnetostrictive level gauge.
[0022] In stratified liquids, the density of the float can be changed, and appropriate adjustments can be made according to the densities of the two liquids to ensure that the float is located at the boundary between the two liquids, allowing it to remain stably at the interface and avoiding jamming due to insufficient buoyancy, thereby improving the measurement accuracy of the level gauge. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.
[0024] Figure 2 This is a schematic diagram of the structure in Embodiment 1 of this utility model.
[0025] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.
[0026] Figure 4 This is a schematic diagram of the internal three-dimensional structure of Embodiment 1 of this utility model.
[0027] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure at point A in the middle.
[0028] Figure 6 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention.
[0029] Explanation of reference numerals in the attached figures
[0030] 11. Tube body; 12. End; 13. Through hole; 14. Arc edge; 15. Long strip hole; 21. Float ball; 22. Magnetic ring; 23. Counterweight; 24. Screw; 25. Sealing ring; 26. Cavity. Detailed Implementation
[0031] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0032] Example 1:
[0033] like Figure 1-2 As shown, the tubular level gauge for measuring stratified liquids and annular space liquids includes:
[0034] The tube body 11 is an annular structure that is adapted to the curvature of the annular space of the liquid to be tested. The surface of the tube body 11 has several evenly distributed through holes 13. The edges of the through holes 13 located on the inner wall of the tube body 11 are provided with arc edges 14. The tube body 11 is equipped with a float 21. The float 21 is equipped with a magnetic ring 22. The bottom end of the float 21 is fixedly connected to a counterweight 23. The bottom of the float 21 and the counterweight 23 are both threaded with screws 24. A gap is formed between the float 21 and the inner wall of the tube body 11 so that the float 21 can move up and down in the annular space of the liquid. The float 21 can still rise and fall smoothly when moving in the annular tube body 11.
[0035] The top end of the tube 11 is fixedly connected to an end 12. Both sides of the tube 11 are provided with elongated holes 15. The inner wall of the tube 11 is polished to ensure a smooth tube wall, and an arc edge 14 is provided to reduce the influence of the through hole 13 on the position of the float 21. A waveguide wire is provided inside the elongated hole 15, and the waveguide wire is electrically connected to the conductive element inside the end 12.
[0036] In this technical solution, the tube body 11 is divided into two halves by the elongated hole 15, and the two semi-circular tube bodies 11 can be spliced together to form a whole.
[0037] In this technical solution, the internal components of the end 12 are connected to the waveguide wire, which can realize the emission of pulse current during measurement, thereby realizing the measurement of the position of the float 21.
[0038] The tube body 11 is provided with a plurality of through holes 13 of the same diameter, the diameter of the through holes 13 being smaller than the diameter of the float 21; a gap is formed between the float 21 and the inner wall of the tube body 11, the distance of the gap being d, wherein the ratio of the distance d to the inner diameter of the tube body 11 is between 1:10 and 2:10.
[0039] When the tube body 11 is located inside the layered liquid, the float 21 is located at the boundary between the two liquids with different densities, namely ρ1 and ρ2, where ρ1>ρ2, and the density of the float 21 is the average of ρ1 and ρ2.
[0040] In this technical solution, the gap between the float 21 and the inner wall of the tube 11 ensures that the float 21 moves smoothly inside the tube 11. The smooth tube wall and the arc edge 14 design enable the float 21 to move smoothly. The ratio of the outer diameter of the float 21 to the inner diameter of the tube 11 is between 8:10 and 9:10, ensuring that the tube 11 can move smoothly.
[0041] The float 21 is composed of two semi-circular annular shells, which are sealed to each other; the magnetic ring 22 is located in the middle of the float 21, and a counterweight 23 is provided below the magnetic ring 22; a cavity 26 for medium storage is formed inside the float 21, and the cavity 26 is connected to the bottom of the float 21.
[0042] In this technical solution, after the magnetic ring 22 is installed inside the float 21, the housing is sealed. Solvents of other densities are added from below the float 21 to make the overall density of the float 21 ρ1+ρ2 / 2, ensuring that it is located at the boundary between the two liquids. After adding different amounts of solvent to adjust the density of the float 21, the screw 24 is tightened to make it press against the sealing ring 25 to achieve a seal at its bottom. The solvent and counterweight 23 are located below the float 21 to ensure that the magnetic ring 22 is in a horizontal position, which can improve the accuracy of liquid level measurement.
[0043] Thus, Figure 1 The dotted line shown is a waveguide. The waveguide is placed inside the elongated hole 15. It is not limited by the shape of the tube body 11 and will not cause jamming due to the presence of the waveguide.
[0044] Example 2:
[0045] like Figure 3-6 As shown, the tubular level gauge for measuring stratified liquids and annular space liquids includes:
[0046] The tube body 11 is a straight tube structure, which can also be used for liquid level detection in straight pipes. The surface of the tube body 11 has several evenly distributed through holes 13. The edges of the through holes 13 located on the inner wall of the tube body 11 are provided with arc edges 14. The tube body 11 is provided with a float 21. The float 21 is provided with a magnetic ring 22 inside. The bottom end of the float 21 is fixedly connected to a counterweight 23. The bottom of the float 21 and the counterweight 23 are both threaded with screws 24. The bottom of the float 21 is provided with a sealing ring 25 that fits with the screws 24. The surface of the float 21 is resin-treated and polished.
[0047] The top end of the tube 11 is fixedly connected to an end 12. Both sides of the tube 11 are provided with elongated holes 15. The inner wall of the tube 11 is polished to ensure a smooth tube wall, and an arc edge 14 is provided to reduce the influence of the through hole 13 on the position of the float 21. A waveguide wire is provided inside the elongated hole 15, and the waveguide wire is electrically connected to the conductive element inside the end 12.
[0048] The tube body 11 is provided with multiple through holes 13 of the same diameter, the diameter of the through holes 13 being smaller than the diameter of the float 21; a gap is formed between the float 21 and the inner wall of the tube body 11, the distance of the gap being d, wherein the ratio of the distance d to the inner diameter of the tube body 11 is between 1:10 and 2:10; the tube body 11 is located inside the layered liquid, and the float 21 is located at the boundary between two liquids of different densities, the densities of the two liquids of different densities being ρ1 and ρ2, wherein ρ1>ρ2, and the density of the float 21 is the average of ρ1 and ρ2.
[0049] The float 21 is composed of two semi-circular annular shells, which are sealed to each other; the magnetic ring 22 is located in the middle of the float 21, and a counterweight 23 is provided below the magnetic ring 22; a cavity 26 for medium storage is formed inside the float 21, and the cavity 26 is connected to the bottom of the float 21; a ring-shaped sealing ring 25 is embedded in the bottom of the float 21, and the screw 24 is fitted and connected to the bottom of the counterweight 23.
[0050] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.
Claims
1. A tubular level gauge for measuring stratified liquids and annular liquids, characterized in that, include: The tube body (11) has several evenly distributed through holes (13) on its surface. The edges of the through holes (13) on the inner wall of the tube body (11) are provided with arc edges (14). The tube body (11) is provided with a float (21). The float (21) is provided with a magnetic ring (22) inside. The bottom of the float (21) is fixedly connected with a counterweight (23). The bottom of the float (21) and the inside of the counterweight (23) are both threaded with screws (24). The bottom of the float (21) is provided with a sealing ring (25) that fits with the screw (24).
2. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 1, characterized in that: The top end of the tube (11) is fixedly connected to an end (12), and elongated holes (15) are provided on both sides of the tube (11).
3. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 2, characterized in that: A waveguide wire is provided inside the elongated hole (15), and the waveguide wire is electrically connected to the conductive element inside the end (12).
4. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 1, characterized in that: The tube body (11) is provided with multiple through holes (13) of the same diameter, and the diameter of the through holes (13) is smaller than the diameter of the float (21).
5. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 1, characterized in that: A gap is formed between the float (21) and the inner wall of the tube (11).
6. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 5, characterized in that: The tube (11) is located inside the layered liquid, and the float (21) is located at the boundary between the two liquids of different densities.
7. The tubular level gauge for measuring stratified liquids and annular space liquids as described in claim 1, characterized in that: The float (21) consists of two semi-circular annular shells, which are sealed together.
8. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 1, characterized in that: The magnetic ring (22) is located in the middle of the float (21), and a counterweight (23) is provided below the magnetic ring (22).
9. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 1, characterized in that: The float (21) has a cavity (26) inside for storing media, and the cavity (26) is connected to the bottom of the float (21).
10. The tubular level gauge for measuring stratified liquids and annular liquids as described in claim 1, characterized in that: The bottom of the float (21) is fitted with a sealing ring (25) with an annular structure, and the screw (24) is fitted and connected to the bottom of the counterweight (23).