CN2317471Y - Pressure float of magnetic float liquid level sensor - Google Patents

Abstract

The utility model relates to a pressure resistant floater of a magnetic floater liquid level sensor, comprising the floating drum of a sealed cavity, a magnetic core arranged in the floating drum and a support frame. The pressure resistant floater of the magnetic floater liquid level sensor is characterized in that the wall of the floating drum is provided with a filling opening provided with a screw buckle and a screw bolt which can seal the opening. Liquefied gas of low molecular weight is filled in the cavity of the floating drum. The utility model has the advantages that the internal pressure produced by the evaporation of liquid helium in the floater under the high temperature can be counteracted, and the external pressure borne by the floater can be balanced. Therefore, the floater is ensured to work normally under the environment of high temperature and pressure and can not be broken.

Description

A kind of Pressure-resistant float of magnetic float formula liquid level sensor

The utility model relates to magnetic float formula liquid level sensor, particularly a kind of float that is applied to this liquid level sensor.

Chinese patent CN2150536Y discloses a kind of magnetic float formula liquid level and has shown and control device, and the magnetic float in this device is to be provided with the magnetic core that the bearing support storing is made by ferromagnetic material in the floating drum made of a cylindric nonmagnetic substance, the tube.

If the device of above structure is applied to detect in the high-pressure boiler control water level, can run into a problem: thus the float of cavity body may deform, damage the accuracy that influences level sensing under High Voltage.

The purpose of this utility model is: overcome the deficiency of prior art, a kind of Pressure-resistant float that can be applicable to the magnetic float formula liquid level sensor in high pressure, the high-temp liquid container is provided.

The utility model can be realized like this: a kind of Pressure-resistant float of magnetic float formula liquid level sensor, comprise closed cavity floating drum, be located at magnetic core and bearing support thereof in the floating drum, it is characterized in that: the floating drum wall is provided with the band inlet buckled of spiral shell and the bolt that can seal this mouthful, is marked with low-molecular-weight liquid gas in the floating drum cavity.

On the such scheme basis, the monnolithic case of floating drum can be that upper and lower spherical crown by two evaginations, middle being combined by a cylinder curved surface constitute.

The utility model advantage is: in high-temp liquid, the low-molecular-weight liquid gas of filling will evaporate, produce very high saturated vapor pressure on the floating drum inwall in the float, and greatly on the whole what the floating drum outer wall was suffered like this will be cut to internal pressure; And the physical principle that is directly proportional with temperature according to pressure, when container inner pressure is higher, then fluid temperature also can raise, so the vapour pressure of liquid gas evaporation increases in the floating drum, in other words, the high-temp liquid container inner pressure is higher, and then the interior pressure of float is also higher.

Accompanying drawing is the utility model example structure synoptic diagram.

Below in conjunction with drawings and Examples the utility model is done further narration:

As shown in the figure: the Floater Structure in this example is made up of floating drum 1, inlet sealing bolt 2, pad 3, magnetic core 4, bearing support 5, liquid helium 7.The profile of floating drum 1 is constituted by upper and lower two spherical crowns, middle cylinder curved surface, and the continuous curve surface that adopts this evagination itself has just increased the mechanical resistance external pressure performance of float as outside surface.

During use, in float, inject the low-molecular-weight liquid gas 7 of a certain amount of liquid helium one class, then bolt 2 is tightened from inlet.Under normal temperature (room temperature), liquid 7 evaporate little, so the float internal pressure is also seldom.In the time of in being in high-pressure boiler one type high temp highly pressurised liquid container, float directly places high-temperature water (liquid), liquid 7 will flash to gas 6 in a large number this moment, produce higher saturated vapor pressure and be somebody's turn to do interior pressure value and increase along with the increased pressure of boiler (container), like this, low-molecular-weight gas liquid 7 at high temperature produces vapour pressure and just plays to the external pressure effect of cutting, float being applied in the balance boiler (container) as the internal pressure of float, thereby guarantees that float is unlikely destroyed in this high-pressure work environment.

Claims (2)

1, a kind of Pressure-resistant float of magnetic float formula liquid level sensor, comprise closed cavity floating drum, be located at magnetic core and bearing support thereof in the floating drum, it is characterized in that: the floating drum wall is provided with the band inlet buckled of spiral shell and the bolt that can seal this mouthful, is marked with low-molecular-weight liquid gas in the floating drum cavity.

2, Pressure-resistant float according to claim 1 is characterized in that: the monnolithic case of floating drum is that upper and lower spherical crown by two evaginations, middle being combined by a cylinder curved surface constitute.