Magnetic transmission water level gauge

Abstract

The utility model discloses a magnetic transmission water level gauge which comprises an encoder component, a water level wheel component, a transmission steel wire rope, a floater and a balance weight. The encoder component and the water level wheel component are positioned on the mounting platform right above the water body, and a plurality of magnetic steels are arranged in the encoder component and the water level wheel component, so that magnetic attraction force exists between the encoder component and the water level wheel component; the encoder component is in a sealed state; the transmission steel wire rope is wound on the water level wheel component, and two ends are respectively connected with the floater and the balance weight; when the water level changes, buoyancy applied to the floater by the water body changes, the floater linearly moves in the vertical direction, and the water level wheel component rotates and drives the code wheel assembly in the encoder component to rotate through magnetic attraction force. The water level gauge can achieve complete sealing and effective lightning protection and insulation, so that water level data can be accurately measured for a long time in severe environments such as high humidity or frequent thunderstorm.

Description

Technical Field

[0001] The utility model relates to the technical field of water level gauges, and particularly relates to a magnetic drive water level gauge. Background Art

[0002] When in use, the float type water level gauge is usually installed in the water level station building. The environment is suitable, which is beneficial to the long-term use of the equipment. However, there are still many water level observation points without the construction conditions of the building. A simple well is adopted, that is, a metal or plastic pipe with a diameter of about 300 mm is used as the well, and an equipment box is fixed at the top for installing the float type water level gauge. Such simple wells have high humidity and are easy to corrode the equipment. At the same time, the float type water level gauge is a contact measurement method, and there are floats and balance weights in contact with the water surface. In areas with frequent thunderstorms, there are sometimes cases where lightning strikes and breaks through the circuit board. Therefore, it is necessary to develop a float type water level gauge that can achieve complete sealing and take into account lightning protection. Summary of the Invention

[0003] The purpose of the utility model is to provide a magnetic drive water level gauge, which can achieve complete sealing and effective lightning protection and insulation, so as to accurately measure water level data for a long time in harsh environments such as high humidity or frequent thunderstorms.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0005] The utility model discloses a magnetic drive water level gauge, which comprises an encoder component, a water level wheel component, a transmission steel wire rope, a float and a balance weight;

[0006] The encoder component and the water level wheel component are located on the installation platform directly above the water body. There are multiple magnetic steels inside both of them, so that there is a magnetic attraction force between them; the encoder component is in a sealed state;

[0007] The transmission steel wire rope is wound around the water level wheel component, and the two ends are respectively connected to the float and the balance weight;

[0008] When the water level changes, the buoyancy applied to the float by the water body changes, the float moves linearly in the vertical direction, the water level wheel component rotates and drives the code wheel assembly inside the encoder component to rotate through the magnetic attraction force.

[0009] Furthermore, the encoder component includes a housing, and a circuit board, a micro switch, a transmission shaft and a code wheel assembly sealed inside the housing;

[0010] The micro switch is welded on the circuit board, the circuit board is fixedly connected to the housing, the transmission shaft is horizontally fixed above the circuit board, the code wheel assembly is sleeved on the transmission shaft in sequence, and multiple first magnetic steels are evenly placed inside the code wheel close to the water level wheel component.

[0011] Further, the circuit board is fixedly connected to the casing with M3 screws.

[0012] Further, bearings are sleeved on both ends of the transmission shaft and are horizontally fixed inside the casing through the bearings.

[0013] Further, six first magnetic steels are evenly placed inside the code wheel adjacent to the water level wheel component.

[0014] Further, the N poles and S poles of two adjacent first magnetic steels are installed in opposite directions.

[0015] Further, the water level wheel component includes a water level wheel ring, a water level wheel hub, an external magnetic seat, a bearing, and a second magnetic steel;

[0016] The outer ring of the water level wheel hub is connected to the water level wheel ring, and the inner ring is connected to the external magnetic seat;

[0017] Multiple second magnetic steels are placed inside the external magnetic seat, and the number of second magnetic steels is the same as that of the first magnetic steels and they are arranged oppositely, so as to generate a magnetic suction force between the external magnetic seat and the adjacent code wheel.

[0018] Further, the water level wheel hub is made of reinforced nylon material.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] The magnetic drive water level gauge of the present utility model can achieve complete sealing and effective lightning protection insulation, so as to accurately measure water level data for a long time in harsh environments such as high humidity or frequent thunderstorms. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the magnetic drive water level gauge of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the water level wheel component of the present utility model;

[0023] Figure 3 is a schematic structural diagram of the encoder component of the present utility model.

[0024] Reference numerals: 1, water level wheel component; 2, encoder component; 3, transmission steel wire rope; 4, float; 5, balance weight; 11, water level wheel ring; 12, water level wheel hub; 13, bearing; 14, external magnetic seat; 15, second magnetic steel; 21, circuit board; 22, micro switch; 23, transmission shaft; 24, casing; 25, code wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes the embodiments of the present utility model in detail with reference to the drawings.

[0026] SeeFigure 1 , this embodiment discloses a magnetic drive water level gauge. The magnetic drive water level gauge includes an encoder component 2, a water level wheel component 1, a transmission steel wire rope 3, a float 4, and a balance weight 5;

[0027] The encoder component 2 and the water level wheel component 1 are located on the installation platform directly above the water body. Multiple magnetic steels are arranged inside both of them, so that there is a magnetic suction force between them; the encoder component 2 is in a sealed state;

[0028] The transmission steel wire rope 3 is wound around the water level wheel component 1, and the two ends are respectively connected to the float 4 and the balance weight 5;

[0029] When the water level changes, the buoyancy force exerted on the float 4 by the water body changes, and the float 4 moves linearly in the vertical direction. The water level wheel component 1 rotates and drives the code wheel assembly inside the encoder component 2 to rotate through the magnetic suction force.

[0030] The balance weight 5 is used for force balance, controlling the tension of the transmission steel wire rope 3, and ensuring that the "water line" position of the float 4 is always at 1 / 2 of its maximum outer circle height.

[0031] The transmission steel wire rope 3 is used for the transmission of force and motion. When the water level amplitude change is small, its self-weight can be ignored for the influence on the transmission process and measurement accuracy.

[0032] The water level wheel component 1 is used to accurately convert the rise and fall change of the water level into the change of the angular displacement amount and transmit it to the encoder component 2.

[0033] The encoder component 2 is used to convert the angular displacement amount into a Gray code system encoded value.

[0034] When the water level gauge is working, the force transmission in its transmission process is jointly completed by the gravity action of the float and the balance weight, the buoyancy action of the water body on the float, the action of the frictional resistance, etc. When the water level does not change, the above three acting forces are in a balanced state; once the water level changes, and this change accumulates to a certain amount, and the change in buoyancy is sufficient to overcome the frictional resistance, the balance relationship of the above three acting forces is broken (until a new balanced state is reached), so that the linear motion generated by this unbalanced force is converted into the rotational motion of the water level wheel component and the input shaft of the encoder component via the transmission steel wire rope, and then converted into digital encoded information quantity output by the encoder component.

[0035] See Figure 3, the encoder component 2 is composed of a housing 24, a circuit board 21, a microswitch 22, a transmission shaft 23, a code wheel assembly 25, etc. The microswitch 22 is soldered on the circuit board 21. The circuit board 21 is fixedly connected to the housing 24 with M3 screws. Bearings are sleeved at both ends of the transmission shaft 23, and it is fixed inside the housing 24 and above the circuit board 21. The code wheel assembly 25 is successively sleeved on the transmission shaft 23. Six permanent magnets are placed inside the set of code wheels at the rightmost end, and the adjacent two N-poles and S-poles are installed in opposite directions. The number of permanent magnets is not fixed, as long as it can play a magnetic attraction role, and the number can be adjusted according to the actual situation.

[0036] See Figure 2 , the water level wheel component 1 is composed of a water level wheel rim 11, a water level wheel hub 12, a wheel shaft 13, an external magnetic seat 14, etc. The water level wheel hub 12 is made of reinforced nylon material with excellent performance. As an intermediate part, the outer ring of the water level wheel hub 12 is connected to the water level wheel rim 11 with M3 screws, and the inner ring is connected to the external magnetic seat 14, playing a role in lightning protection and insulation. Six permanent magnets are also placed inside the external magnetic seat 14, and the adjacent two N-poles and S-poles are installed in opposite directions, and magnetic attraction occurs with the code wheel inside the housing. When the water level wheel component 1 rotates, the code wheel inside the encoder component 2 immediately rotates in the same direction, thereby achieving the purpose of driving the internal transmission mechanism to rotate with external magnetic force in a sealed environment.

[0037] The installation method of the magnetic drive water level gauge in this embodiment is similar to that of a conventional water level gauge, as follows:

[0038] (1) On the installation platform of the water level measuring well, draw a straight line along any diameter direction of the well (it should be convenient for observation. Usually, from the normal observation position, this straight line is vertical), and then determine the center position of the well. On this straight line, drill a hole with a diameter of about 20 mm at a distance of 18.5 mm from the center position of the well towards the observer (when using a Φ90 mm float, this dimension is 32.5 mm). This hole serves as the wire passing hole for the transmission wire rope at the float end; then, with this hole as the reference, drill a hole of the same size at a distance of 102 mm along the straight line away from the observer as the wire passing hole for the transmission wire rope at the balance weight end. When the diameter of the measuring well is large enough, users do not have to follow the above procedure. In principle, it is advisable to ensure that there is sufficient clearance between the float, the balance weight, and the inner wall of the measuring well.

[0039] (2) Fasten the water level wheel component to the end face of the right bearing seat of the encoder for later use.

[0040] (3) Pass the transmission wire rope through the wire passing hole at the balance weight end from above the installation platform, and then take out the rope end from below the platform for later use.

[0041] (4) Remove the suspension screw at the upper end of the balance weight, insert the rope end through the small end of the suspension screw, tie a knot, and tighten the steel wire rope until the knot retracts into the hole of the suspension screw; cut off the excess steel wire rope that is exposed, and then screw the suspension screw into and tighten it on the balance weight.

[0042] (5) Lower the balance weight into the well logging until it touches the bottom of the well, and cut the steel wire rope at about 1.5 m above the installation platform.

[0043] (6) Pass the rope end through the wire passing hole at the float end from above the platform, and then fix the drive steel wire rope to the float in a similar manner as described above.

[0044] (7) Place the encoder component (together with the water level wheel component) at the predetermined position, pass the drive steel wire rope around the water level wheel, and slowly lower the float into the well logging until it touches the water surface and automatically finds the balance point.

[0045] (8) Fine-tune the position of the encoder so that the drive steel wire ropes at both ends of the water level wheel are at the center of the wire passing hole, and then fix the water level gauge to the installation platform with wood screws.

[0046] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A magnetic transmission water level gauge, characterized in that: The magnetic transmission water level gauge comprises an encoder component, a water level wheel component, a transmission wire rope, a float and a counterweight; The encoder component and the water level wheel component are located on a mounting platform directly above the water body, and multiple magnetic steels are arranged inside both of them, so that there is magnetic attraction between the two; the encoder component is in a sealed state; The transmission wire rope is wound around the water level wheel component, and the two ends are respectively connected to the float and the balance weight; When the water level changes, the buoyancy exerted by the water on the float changes, the float moves linearly in the vertical direction, the water level wheel component rotates and drives the code wheel assembly inside the encoder component to rotate through magnetic attraction.

2. The magnetic transmission water level gauge according to claim 1, characterized in that: The encoder component includes a housing, and a circuit board, a micro switch, a transmission shaft and a code wheel assembly sealed inside the housing; The micro switch is welded on the circuit board, the circuit board is fixedly connected to the casing, the transmission shaft is horizontally fixed above the circuit board, the code wheel assembly is sequentially sleeved on the transmission shaft, and a plurality of first magnetic steels are evenly placed inside the code wheel adjacent to the water level wheel component.

3. The magnetic transmission water level gauge according to claim 2, characterized in that: The circuit board is fixedly connected to the casing with M3 screws.

4. The magnetic transmission water level gauge according to claim 2, characterized in that: The transmission shaft has bearings at both ends and is horizontally fixed to the inner side of the casing through the bearings.

5. The magnetic transmission water level gauge according to claim 2, characterized in that: Six first magnetic steels are evenly placed inside the code wheel adjacent to the water level wheel component.

6. The magnetic transmission water level gauge according to claim 2, characterized in that: The N poles and S poles of two adjacent first magnetic steels are installed in opposite directions.

7. The magnetic transmission water level gauge according to claim 2, characterized in that: The water level wheel component includes a water level wheel rim, a water level wheel hub, an external magnetic seat, a bearing and a second magnetic steel; The outer ring of the water level hub is connected to the water level rim, and the inner ring is connected to the external magnetic seat; A plurality of second magnetic steels are placed inside the external magnetic base. The number of the second magnetic steels is the same as that of the first magnetic steels and they are arranged opposite to each other, so that a magnetic attraction force is generated between the external magnetic base and the adjacent code wheel.

8. The magnetic transmission water level gauge according to claim 7, characterized in that: The water level hub is made of reinforced nylon material.

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