Heat tracing type double-color water level gauge

Abstract

The utility model discloses a heat tracing type double-color water level gauge which is provided with an installation shell, a gauge body is installed in the installation shell and comprises a liquid level gauge body, the upper portion of the liquid level gauge body is connected with a steam inlet valve, the lower portion of the liquid level gauge body is connected with a water inlet valve, a longitudinal groove is formed in the side wall of the liquid level gauge body, an electric heat tracing band is installed in the groove, and a pressing plate is installed at a groove opening of the groove through a screw. The lower end of the electric tracing band penetrates out of a gap between the bottom of the pressing plate and the lower notch of the groove, and the lower end of the electric tracing band is connected with a power junction box; a supporting plate which horizontally extends out is fixed on one side of the bottom of the liquid level meter body, and the power supply junction box is fixed on the supporting plate. The liquid level meter further comprises aluminum-foil paper covering the electric tracing band in the longitudinal groove in the side face of the liquid level meter body, and the inner wall of the pressing plate is tightly pressed on the aluminum-foil paper. When the boiler drum water level meter is used for measuring the boiler drum water level, the temperature of water in the meter body is approximately consistent with that of water in the boiler drum, so that the boiler drum water level can be measured relatively accurately.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double -colored water level meter, concretely relates to a heat tracing type double -colored water level meter. BACKGROUND

[0002] Double -colored water level meter is used for steam boiler drum or other pressure container monitoring water level primary just -place direct -reading instrument. It shows liquid level through steam red, water green, and there is no blind area in the visual range of water level meter and continuous monitoring. Double -colored water level meter is mainly composed of several parts such as table body, steam valve, water valve, blowdown valve, semiconductor light source, light shield etc. Double -colored water level meter directly observes liquid level through several windows of table body. When the boiler is in normal operation, the water level shown by water level meter and the water level in the boiler drum have certain difference, and the difference increases with the increase of the saturation temperature in the boiler drum, which is the water level difference that everyone often says. The water level difference is caused by the temperature difference between the boiler and water level meter. The boiler itself is a heat source body, which can ensure that the temperature of the drum is basically unchanged, and the temperature of the water level meter is affected by many factors. The water level meter is constantly emitting heat, so the temperature of the saturated water and steam in the water level meter also decreases, the density of the saturated water and steam increases, and then the water level difference is generated. The appearance of the water level difference makes the measurement of the water level meter inaccurate, which will affect the safe and stable operation of the drum. SUMMARY

[0003] The utility model wants to solve the technical problem to provide a heat tracing type double -colored water level meter that the water temperature of water in the table body is close to the water temperature of water in the boiler drum when measuring the water level of the boiler drum, so that the water level of the boiler drum can be measured relatively accurately.

[0004] To solve the above technical problem, the heat tracing type double -colored water level meter has a mounting shell, the mounting shell is provided with a table body, the table body includes a liquid level meter body, the mounting shell is provided with a longitudinal strip liquid level observation window, the upper portion of the liquid level meter body is connected with a steam inlet valve through a steam connecting pipe, the lower portion of the liquid level meter body is connected with a water inlet valve through a water connecting pipe, the bottom of the liquid level meter body is connected with a blowdown valve, the side wall of the liquid level meter body is provided with a longitudinal groove, an electric heat tracing band is installed in the groove, a pressing plate is screwed at the groove opening of the groove, the lower end of the electric heat tracing band is connected with a power supply terminal box, and the lower end of the electric heat tracing band is connected with the power supply terminal box.

[0005] As an improvement of the utility model, the aluminum foil paper covering the electric heat tracing band in the longitudinal groove of the side of the liquid level meter body is further included, and the inner wall of the pressing plate is tightly pressed on the aluminum foil paper.

[0006] The power connection box needs to be connected to the power supply, the liquid level meter body is heated through the electric heat tracing band, the temperature of the water sample in the body can be improved, the consistency of the water sample in the steam pocket and the water sample in the body is enhanced, and the measurement accuracy of the liquid level meter can be improved; after the aluminum foil paper is covered on the electric heat tracing band in the groove, the heat radiation and conduction of the electric heat tracing band to the external environment can be effectively reduced, the heat efficiency is improved, and the electric energy can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0007] The utility model makes further detailed description in combination with the drawings.

[0008] Figure 1 It is the main view structural schematic diagram of the utility model heat tracing type bicolor water level meter.

[0009] Figure 2 It is the cross section along Figure 1 A-A line of the utility model heat tracing type bicolor water level meter.

[0010] Figure 3 It is the Figure 2 after removing the electric heat tracing band. PREFERRED EMBODIMENT

[0011] Figures 1-3 In the utility model heat tracing type bicolor water level meter, the installation shell is equipped with the meter body 2, the meter body includes the liquid level meter body 3, the installation shell is provided with the longitudinal strip liquid level observation window 4, the upper portion of the liquid level meter body is connected with the steam inlet valve 6 through the steam connecting pipe 5, the lower portion of the liquid level meter body is connected with the water inlet valve 8 through the water connecting pipe 7, the bottom of the liquid level meter body is connected with the blowdown valve 9, characterized by: the side wall of the liquid level meter body 3 is provided with the longitudinal groove 10, the electric heat tracing band 11 is installed in the groove, the groove is provided with the pressing plate 13 through the screw 12 at the slot, the lower end of the electric heat tracing band 11 is connected with the power connection box 14, the lower end of the electric heat tracing band 11 is connected with the power connection box 14, the bottom of the liquid level meter body is fixed with the horizontally extending support plate 15, and the power connection box is fixed on the support plate. It also includes the aluminum foil paper 16 covered on the electric heat tracing band 11 in the longitudinal groove 10 of the liquid level meter body, and the inner wall of the pressing plate 13 is pressed on the aluminum foil paper.

[0012] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical scheme described in the utility model embodiment, and any modification or equivalent replacement to the utility model to achieve the same technical effect is within the protection scope of the utility model.

Claims

1. A heat-traced bicolor water level gauge, comprising a mounting housing (1), a gauge body (2) inside the mounting housing, the gauge body including a level gauge body (3), a longitudinal strip-shaped level observation window (4) on the mounting housing, an inlet valve (6) connected to the upper part of the level gauge body via a steam connecting pipe (5), an inlet valve (8) connected to the lower part of the level gauge body via a water connecting pipe (7), and a drain valve (9) connected to the bottom of the level gauge body, characterized in that: The side wall of the liquid level gauge body (3) is provided with a longitudinal groove (10), and an electric heat tracing band (11) is installed in the groove. A pressing plate (13) is installed at the opening of the groove by means of a screw (12). The lower end of the electric heat tracing band (11) is arranged to pass through the gap between the bottom of the pressing plate and the lower opening of the groove, and a power supply terminal box (14) is connected to the lower end of the electric heat tracing band. A horizontally extending support plate (15) is fixed to one side of the bottom of the liquid level gauge body, and the power supply terminal box is fixed to the support plate.

2. The heat-traced dual-color water level gauge as claimed in claim 1, wherein: An aluminum foil (16) is further provided to cover the electric heat tracing band (11) in the longitudinal groove (10) of the side wall of the liquid level gauge body, and the inner wall of the pressing plate (13) is pressed against the aluminum foil.

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