An improved lever float switch device

Abstract

This invention provides an improved lever float switch device. By adding a stainless steel float and a telescopic rod, and connecting it to a mechanical float switch using a connecting piece, a hollow tube, and a welded surface, the spatial reconstruction of the mechanical linkage system completely isolates the electrical wires from the steam contact area, improving electrical safety while ensuring the accuracy of liquid level detection. This not only extends the service life of the float switch and saves costs, but also eliminates the need to empty the water tank when replacing the mechanical float. Furthermore, the welded surface avoids the risk of burns to operators who are observing the float switch, further enhancing maintenance convenience and safety.

Description

Technical Field

[0001] This utility model relates to the technical field of automatic liquid level control devices, specifically a steam-resistant lever float switch device suitable for high-temperature liquid containers, especially suitable for industrial equipment such as boilers and steam storage tanks that are at risk of steam corrosion. Background Technology

[0002] Existing float level switches have the following drawbacks: the mechanical float is directly immersed in the water tank, causing the wires to be exposed to high-temperature steam for extended periods, accelerating aging. Although existing technologies use waterproof coatings to improve the wires, the problem of steam penetration remains unresolved. Even with a waterproof coating, the wires will still age faster due to prolonged exposure to high-temperature steam. This invention achieves complete isolation between the electrical components and the steam environment through structural innovation. This not only extends the lifespan of the float switch and saves costs, but also avoids the risk of burns to operators who need to observe the float switch's status. Summary of the Invention

[0003] This utility model provides an improved lever float switch device. By adding a stainless steel float and a telescopic rod, and using connecting pieces, hollow tubes, and welded planes to connect with the mechanical float switch, the spatial reconstruction of the mechanical linkage system completely separates the wires from the steam contact area, while ensuring the accuracy of liquid level detection. This not only extends the service life of the float switch and saves costs, but also eliminates the need to drain the water tank when replacing the mechanical float, and avoids the risk of burns that operators may experience when observing the status of the float switch.

[0004] This utility model discloses an improved lever float switch device, characterized by comprising: a stainless steel float, a telescopic rod, a hollow tube, a welded plane, a mechanical float, an electric wire, and a connecting piece, comprising the following components: a buoyancy actuator: the stainless steel float is welded to the telescopic rod and then linked to the mechanical float via the connecting piece, the telescopic rod sliding through the hollow tube; a steam isolation assembly: the lower end of the hollow tube is sealed to the top plate of the water tank via the welded plane, and the upper end extends to the drying area; an electrical connection module: the mechanical float triggers a micro switch via the connecting piece, and the electric wire is led out from the side of the drying area.

[0005] Furthermore, the stainless steel float has a diameter of 30mm-40mm and is welded to the telescopic rod.

[0006] Furthermore, a steam expansion compensation gap of 0.5-1mm is maintained between the telescopic rod and the hollow tube.

[0007] Furthermore, the connecting piece is a thin sheet of stainless steel.

[0008] Furthermore, the welding plane divides the device into a wet zone (containing stainless steel floats) and a dry zone (containing mechanical floats and wires).

[0009] Beneficial effects of this utility model

[0010] Improved electrical safety: Complete isolation between electrical wires and the steam environment significantly reduces the failure rate of aging electrical wires and saves production costs; Convenience and safety of maintenance: No need to empty the water tank when replacing the mechanical float, and the mechanical float is separated from the steam storage tank by a partition, which also prevents operators from being scalded by steam. Attached Figure Description

[0011] Figure 1 -Simplified structural diagram of this utility model;

[0012] Among them, 1-water pool, 2-stainless steel float, 3-telescopic rod, 4-hollow tube, 5-welded surface, 61-mechanical float, 62-electric wire, 63-connecting piece. Detailed Implementation

[0013] Figure 1 The following is a detailed description of the structure of this utility model, with reference to the accompanying drawings: Assembly steps of the utility model device: First, the hollow tube 4 is vertically welded to the top plate of the water tank 1 to form a welding plane 5; second, the telescopic rod 3 is inserted into the hollow tube 4, and a stainless steel float 2 is welded to the lower end; then, a mechanical float 61 is installed in the dry area above the welding plane 5, and connected to the top of the telescopic rod 3 through a connecting piece 63; finally, the wire 62 is led out from the side of the mechanical float 61 and connected to the control system. The inner wall of the hollow tube 4 is coated with a 0.1mm thick polytetrafluoroethylene coating to reduce the coefficient of friction, and the welding plane 5 is provided with annular heat dissipation fins to enhance steam condensation. In this embodiment, the telescopic rod is 1.5m long, suitable for a steam storage tank with a depth of 2m, and can detect a minimum water level of 0.5m and a maximum water level of 1.5m. The stainless steel float 2 has a diameter of 30mm, and a 0.5mm steam expansion compensation gap is maintained between the telescopic rod 3 and the hollow tube 4. When the water level rises, the stainless steel float 2 moves the telescopic rod 3 upward, pushing the mechanical float 61 to trigger a high water level signal; when the water level drops, the telescopic rod 3 resets under gravity, and the mechanical float 61 returns to the low water level position; the steam condenses in the hollow tube 4 and flows back to the water tank 1 along the tube wall.

[0014] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An improved lever float switch device characterized by include: Buoyancy actuator: a stainless steel float (2) is welded to a telescopic rod (3) and then linked with a mechanical float (61). The telescopic rod (3) slides through the hollow tube (4). Steam isolation assembly: the lower end of the hollow tube (4) passes through the welding plane (5) and is sealed to the top plate of the water tank (1). The upper end extends to the drying area. Electrical connection module: the mechanical float (61) triggers a micro switch through a connecting piece (63). The wire (62) is led out from the side of the drying area.

2. The apparatus of claim 1, wherein The stainless steel float (2) has a diameter of 30mm-40mm and is welded to the telescopic rod (3).

3. The apparatus of claim 1, wherein A steam expansion compensation gap of 0.5-1mm is maintained between the telescopic rod (3) and the hollow tube (4).

4. The apparatus of claim 1, wherein The connecting piece (63) is a thin sheet of stainless steel.

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