Magnetostrictive liquid level meter
By setting the lower limit block, upper limit seal and anti-corrosion and anti-adsorption coating in the magnetostrictive level gauge, the problem of the influence of foreign matter adsorption during long-term use of the traditional level gauge is solved, and more accurate liquid level measurement is achieved.
Patent Information
- Application Number
- CN202422140288.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-02
AI Technical Summary
Traditional magnetostrictive liquid level meters are easily adsorbed and accumulated foreign matter when placed in tanks with mixed liquids for a long time, affecting the movement of floats and the accuracy of detection data.
A magnetostrictive liquid level meter is designed, including an external measuring rod, a fixed plug, a float ball, a lower limit block, an upper limit seal and an anti-corrosion and anti-adsorption coating. By setting the lower limit block and the upper limit block, the range of motion of the float ball is limited, and the liquid component is prevented from adhesion through anti-corrosion and anti-adsorption coating, ensuring the normal sliding of the float ball and the accuracy of the measurement data.
It effectively prevents the adsorption and accumulation of liquid foreign matter, ensures the normal movement of the float and the accuracy of detection data, and solves the problem of inaccurate data during long-term use of traditional liquid level meters.
Smart Images
Figure CN223021344U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of liquid level measurement, and specifically discloses a magnetostrictive liquid level gauge. Background Art
[0002] Magnetostrictive liquid level gauges are used for liquid level industrial measurement and control of various liquid tanks such as oil, chemical raw material storage, industrial processes, biochemistry, medicine, food and beverage, tank farm management, and underground inventory of gas stations, as well as for occasions such as dam water level, reservoir water level monitoring, and sewage treatment.
[0003] Existing magnetostrictive liquid level gauges mainly consist of three parts: a detection rod, a circuit unit, and a float. A waveguide wire for transmitting electrical signals is provided inside the detection rod. During measurement, the circuit unit generates a current pulse, which travels downward along the waveguide wire and generates an annular magnetic field. The float is sleeved outside the detection rod and can move up and down along the detection rod with the change of the liquid level. A set of permanent magnets is installed inside the float, so the float also generates a magnetic field. When the annular magnetic field meets the magnetic field of the float, a "twist" pulse, or a "return" pulse, is generated. The time difference between the "return" pulse and the current pulse is converted into a pulse signal, thereby calculating the actual position of the float and then measuring the liquid level.
[0004] However, magnetostrictive liquid level gauges are usually placed in a tank filled with a mixture of liquids during measurement. During measurement, the detection rod extends into the tank, and the circuit unit is hung outside the top port of the tank. After long-term use, foreign substances that detect the liquid will adhere to the surface of the detection rod. When the foreign substances accumulate too much, it will affect the movement of the float, thereby affecting the accuracy of the detection data. Therefore, in view of this, the inventor provides a magnetostrictive liquid level gauge to solve the above problems. Summary of the Utility Model
[0005] The purpose of the present utility model is to solve the problem that traditional magnetostrictive liquid level gauges are prone to adsorb and accumulate foreign substances on their surfaces when placed and used in a tank filled with a mixture of liquids for a long time, which affects the movement of the float and the accuracy of detection data.
[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a magnetostrictive liquid level gauge, including an outer measuring rod for contacting the detection liquid in the tank body, a fixed plug arranged at the top of the outer measuring rod and located outside the top end of the tank body, and a float slidably connected to the side of the outer measuring rod, the bottom of the outer measuring rod is provided with a lower limit block for limiting the lowest downward position of the float, the side of the outer measuring rod is also provided with an upper limit sealing member for adjusting the highest upward position of the float and can be hung on the top port of the tank body, the surfaces of the fixed plug, the outer measuring rod and the float are also provided with an anti-corrosion coating, the surface of the anti-corrosion coating is also provided with an anti-adsorption coating, the waveguide wire is arranged in the outer measuring rod and connected between the fixed plug and the lower limit block, the magnetic steel is evenly arranged in the float, and the circuit unit is installed in the fixed plug.
[0007] The principles and effects of this basic solution are:
[0008] 1. Compared with the prior art, the utility model sets a lower limit block to limit the lowest downward position of the float ball, prevents the float ball from sliding off the outer measuring rod, and thus performs the liquid level measurement operation inside the tank body. By setting an upper limit plugging piece that can adjust the maximum upward position of the float ball, not only the opening end of the tank body is blocked during the measurement process, but also the sliding stroke of the float ball suitable for the current liquid level measurement can be adjusted according to the approximate liquid level of the tank body, and the installation depth that the outer measuring rod can enter into the tank body can be adjusted according to the actual situation. The utility model has practicality and flexible use. The outer surfaces of the measuring rod and the float are provided with anti-corrosion coating and anti-adsorption coating in turn, firstly, to prevent the measured liquid in the tank from adhering to the surface of the magnetostrictive level meter, and to prevent the components of the liquid from adhering to the structural surface of the magnetostrictive level meter and affecting the normal sliding of the float on the outer measuring rod, and further to provide anti-corrosion protection for the structure of the magnetostrictive level meter by using the anti-corrosion coating to avoid corrosion caused by long-term contact with the measured liquid, thus solving the problem that the traditional magnetostrictive level meter is easily adsorbed and accumulated with foreign matter on its surface when placed in a tank of mixed liquid for a long time, thus affecting the movement of the float and the accuracy of the detection data.
[0009] Furthermore, the fixed plug includes a fixed block fixedly connected to the top of the outer measuring rod, a plug shell detachably connected to the end of the fixed block away from the outer measuring rod, and a fixed outer cover detachably mounted between the fixed block and the outer side of the plug shell, and the circuit unit is installed on the surface of the end of the fixed block away from the outer measuring rod. By setting up the fixed block, it is convenient to connect the outer measuring rod and to fix and install the outer measuring rod on the tank body, and it is also convenient to install and fix the waveguide wire. By setting up the plug shell, it is convenient to accommodate and protect the circuit unit installed in the fixed plug, and provide waterproof and dustproof protection for the circuit unit. By setting up the fixed outer cover, it is convenient to reinforce the connection between the fixed block and the plug shell, making the structure more stable.
[0010] Further, a top anti-corrosion layer is provided on the surface of the fixed plug. By providing the top anti-corrosion layer, it is convenient to provide anti-corrosion protection for the interior of the fixed plug.
[0011] Further, the circuit unit includes a mounting bracket provided on the fixed plug and located below the interior of the plug housing, a controller provided on the mounting bracket, and a power supply board provided on the mounting bracket and used to supply power to the circuit unit. The excitation module is mounted on the mounting bracket, and a power connection plug for connecting the power supply board to the power supply is detachably connected to one side of the plug housing. By providing the mounting bracket to support and fix the controller and the power supply board, the structural stability is improved. By providing the power supply board and the power connection plug, it is convenient to supply power to the circuit unit, thereby ensuring the normal operation of the liquid level measurement work of the magnetostrictive liquid level gauge.
[0012] Further, the upper limit plugging member includes a movable chuck slidably sleeved on the side of the outer measuring rod and detachably plug-connected to the tank body, and sealing rings symmetrically provided at the top and bottom of the movable chuck and sleeved on the side of the outer measuring rod. The radius of the bottom side of the movable chuck is not less than the caliber of the top port of the tank body. By providing the movable chuck that can slide on the side of the outer measuring rod, it is convenient to limit the top position of the upward sliding of the floating ball and limit the length that the outer measuring rod can extend into the tank body, which is convenient for the magnetostrictive liquid level gauge to be used in the liquid level measurement of tanks with different depths. By providing sealing rings at both ends of the movable chuck, it is convenient to seal the top port of the tank body with the movable chuck and the sealing rings during use to prevent liquid from overflowing. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0014] Figure 1 Shows the main structural view of a magnetostrictive liquid level gauge proposed by an embodiment of the present application;
[0015] Figure 2 Shows the main structural sectional view of a magnetostrictive liquid level gauge proposed by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and their effects of the present invention as follows.
[0017] The reference numerals in the accompanying drawings of the specification include: outer measuring rod 1, fixed plug 2, floating ball 3, lower limit block 4, waveguide wire 5, fixed plug block 6, plug housing 7, fixed outer cover 8, mounting bracket 9, power supply board 10, controller 11, power connection plug 12, movable chuck 13, and sealing ring 14.
[0018] A magnetostrictive liquid level gauge, for example Figure 1 As shown: It includes an outer measuring rod 1 for contacting the detected liquid in the tank, a fixed plug 2 provided at the top of the outer measuring rod 1 and located outside the top of the tank, and a floating ball 3 slidably connected to the side of the outer measuring rod 1. A lower limit block 4 for restricting the lowest downward position of the floating ball 3 is provided at the bottom of the outer measuring rod 1. An upper limit blocking member for adjusting the highest upward position of the floating ball 3 and capable of hanging on the top port of the tank is also provided on the side of the outer measuring rod 1. Anticorrosion coatings are provided on the surfaces of the fixed plug 2, outer measuring rod 1, and floating ball 3, and anti-adsorption coatings are provided on the surfaces of the anticorrosion coatings. The waveguide wire 5 is provided inside the outer measuring rod 1 and connected between the fixed plug 2 and the lower limit block 4. Magnets are evenly arranged inside the floating ball 3. The circuit unit is installed inside the fixed plug 2. The anticorrosion coating includes but is not limited to being made of polymethyl methacrylate, and the anti-adsorption coating includes but is not limited to being made of Teflon coating.
[0019] Among them, as Figure 2 shown, the fixed plug 2 includes a fixed plug block 6 fixedly connected to the top of the outer measuring rod 1, a plug housing 7 detachably connected to one end of the fixed plug block 6 away from the outer measuring rod 1, and a fixed outer cover 8 detachably sleeved between the outer sides of the fixed plug block 6 and the plug housing 7. The circuit unit is installed on the surface of one end of the fixed plug block 6 away from the outer measuring rod 1. Among them, as Figure 2 shown, a top anticorrosion layer is provided on the surface of the fixed plug block 6, and the top anticorrosion layer includes but is not limited to being made of polymethyl methacrylate.
[0020] Among them, as Figure 2 shown, the circuit unit includes a mounting bracket 9 provided on the fixed plug block 6 and located below the inside of the plug housing 7, a controller 11 provided on the mounting bracket 9, and a power supply board 10 provided on the mounting bracket 9 and used to supply power to the circuit unit. Among them, the controller 11 is a single-chip microcomputer controller 11. The excitation module is installed on the mounting bracket 9. A power connection plug 12 for connecting the power supply board 10 to the power supply is also detachably connected to one side of the plug housing 7.
[0021] Among them, as Figure 1 and Figure 2 shown, the upper limit blocking member includes a movable chuck 13 slidably sleeved on the side of the outer measuring rod 1 and capable of being detachably blocked and connected to the tank, and sealing rings 14 symmetrically provided at the top and bottom of the movable chuck 13 and sleeved on the side of the outer measuring rod 1. The bottom side radius of the movable chuck 13 is not less than the caliber of the top port of the tank.
[0022] In the specific implementation process of the utility model, when measuring the liquid level of the liquid in the tank body, manually apply force to the movable chuck 13, slide the movable chuck 13 up or down along the outer measuring rod 1 to a safe height that allows the outer measuring rod 1 to meet the tank body for liquid level measurement, that is, determine the length of the outer measuring rod 1 inserted into the tank body, then extend the outer measuring rod 1 into the tank body, and measure the liquid level of the liquid in the tank body according to the measurement operation in the prior art. The existing liquid measurement principle: the circuit unit generates a current pulse, which is transmitted downward along the waveguide wire 5 and generates an annular magnetic field. The float 3 is sleeved on the outside of the outer measuring rod 1 and can move up and down along the outer measuring rod 1 as the liquid level changes. A group of magnetic steels are installed in the float 3, so the float 3 generates a magnetic field at the same time. When the annular magnetic field meets the magnetic field of the float 3, a "distorted" pulse, or a "return" pulse, is generated. The time difference between the "return" pulse and the current pulse is converted into a pulse signal, thereby calculating the actual position of the float 3 and then measuring the liquid level.
[0023] Compared with the prior art, the utility model sets a lower limit block 4 to limit the lowest downward position of the float 3, preventing the float 3 from sliding off the outer measuring rod 1, thereby performing a liquid level measurement operation inside the tank body. By setting an upper limit plugging piece that can adjust the maximum upward position of the float 3, not only the opening end of the tank body is blocked during the measurement process, but also the sliding stroke of the float 3 suitable for the current liquid level measurement can be adjusted according to the approximate liquid level of the tank body, and the installation depth that the outer measuring rod 1 can enter into the tank body can be adjusted according to actual conditions. The utility model has practicality and flexible use. By fixing the plug 2, The outer surfaces of the outer measuring rod 1 and the float 3 are provided with an anti-corrosion coating and an anti-adsorption coating in sequence, firstly, to prevent the measured liquid in the tank from adhering to the surface of the magnetostrictive liquid level meter, and to prevent the components of the liquid from adhering to the structural surface of the magnetostrictive liquid level meter and affecting the normal sliding of the float 3 on the outer measuring rod 1, and further to provide anti-corrosion protection for the structure of the magnetostrictive liquid level meter by using the anti-corrosion coating to avoid corrosion caused by long-term contact with the measured liquid, thus solving the problem that the traditional magnetostrictive liquid level meter is easily adsorbed and accumulated with foreign matter on its surface when placed in a tank of mixed liquid for a long time, thus affecting the movement of the float and the accuracy of the detection data.
[0024] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the technical content disclosed above. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims
1. A magnetostrictive liquid level gauge, characterized in that: It includes an outer measuring rod for contacting the detection liquid in the tank body, a fixed plug arranged on the top of the outer measuring rod and located outside the top of the tank body, and a floating ball slidably connected to the side of the outer measuring rod. The bottom of the outer measuring rod is provided with a lower limit block for limiting the lowest downward position of the floating ball. The side of the outer measuring rod is also provided with an upper limit sealing piece for adjusting the highest upward position of the floating ball and can be hung on the top port of the tank body. The surfaces of the fixed plug, the outer measuring rod and the floating ball are also provided with an anti-corrosion coating, and the surface of the anti-corrosion coating is also provided with an anti-adsorption coating. The waveguide wire is arranged in the outer measuring rod and connected between the fixed plug and the lower limit block. The magnetic steel is evenly arranged in the floating ball, and the circuit unit is installed in the fixed plug.
2. A magnetostrictive liquid level gauge according to claim 1, characterized in that: The fixed plug includes a fixed block fixedly connected to the top of the outer measuring rod, a plug shell detachably connected to the end of the fixed block away from the outer measuring rod, and a fixed outer cover detachably mounted between the fixed block and the outer side of the plug shell, and the circuit unit is installed on the surface of the end of the fixed block away from the outer measuring rod.
3. A magnetostrictive liquid level gauge according to claim 2, characterized in that: A top anti-corrosion layer is provided on the surface of the fixed block.
4. A magnetostrictive liquid level gauge according to claim 3, characterized in that: The circuit unit includes a mounting bracket arranged on the fixed block and located at the lower interior of the plug shell, a controller arranged on the mounting bracket, and a power board arranged on the mounting bracket and used to supply power to the circuit unit. The excitation module is mounted on the mounting bracket, and one side of the plug shell is also detachably connected with a power plug for connecting the power board to power.
5. A magnetostrictive liquid level gauge according to claim 4, characterized in that: The upper limit sealing member includes an active chuck which is slidably mounted on the side of the outer measuring rod and can be detachably sealed with the tank body, and a sealing ring which is symmetrically arranged on the top and bottom of the active chuck and mounted on the side of the outer measuring rod. The bottom side radius of the active chuck is not less than the caliber of the top port of the tank body.