A glass plate liquid level gauge

Abstract

The utility model discloses a glass plate liquid level meter has the measuring cylinder, forms the liquid level measurement cavity of cylindrical in the measuring cylinder, the top of measuring cylinder is equipped with the steam valve, is equipped with the water valve at the bottom, the bottom of water valve is connected with the blowdown valve, and the front, rear side of measuring cylinder is respectively through the gland interval pressure and is equipped with the glass plate window, and the gland of front, rear side of measuring cylinder is connected fixed through connecting bolt and fastening nut, the liquid level measurement cavity be provided with the heat -traced pipe, and the upper, lower end of heat -traced pipe is by the horizontal seal of cylinder wall of measuring cylinder upper, lower part and is worn out, and the heat -traced pipe end portion that horizontal seal is worn out to the cylinder wall of measuring cylinder upper, lower part is equipped with quick -coupling respectively, the outside of measuring cylinder still is equipped with the outer tube, and the heat -preserving cotton is filled between measuring cylinder and outer tube. When the utility model discloses the application measurement boiler steam pocket water level, the water temperature of water in measuring cylinder is close to the water temperature of water in boiler steam pocket, thereby can relatively accurate measurement the water level of boiler steam pocket.

Description

Technical Field

[0001] This utility model relates to a glass plate level gauge. Background Technology

[0002] Glass plate level gauges are characterized by their simple structure, clear display, low maintenance, low cost, and high safety and reliability, and their usage is increasing year by year. A glass plate level gauge consists of a measuring cylinder, gland, bolts, window assembly, valve, etc., and can be used for water level measurement in steam boiler drums.

[0003] During normal boiler operation, there is a certain difference between the water level measured by the glass plate level gauge and the water level inside the boiler drum. This difference increases as the saturation temperature inside the boiler drum increases; this is what is commonly referred to as the water level difference. The water level difference arises from the temperature difference between the boiler and the level gauge. The boiler itself is a heat source, ensuring a relatively constant temperature in the boiler drum. However, the temperature of the level gauge is affected by various factors. The level gauge constantly dissipates heat, causing the temperature of the saturated water and steam inside the gauge to decrease, and the density of the saturated water and steam to increase, thus creating the water level difference. This water level difference makes the level gauge reading inaccurate, which can affect the safe and stable operation of the boiler drum. Furthermore, the water level inside the boiler drum needs to be controlled within a certain range; exceeding the high point or falling below the low point poses a safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a glass plate water level gauge that can measure the water temperature in the measuring cylinder at approximately the same temperature as the water temperature in the boiler drum when measuring the boiler drum water level, thereby enabling relatively accurate measurement of the boiler drum water level.

[0005] To solve the above-mentioned technical problems, this utility model provides a glass plate level gauge, which has a measuring cylinder with a cylindrical level measuring chamber formed inside. A steam valve is installed at the top of the measuring cylinder, and a water valve is installed at the bottom. A drain valve is connected to the bottom of the water valve. Glass plate windows are longitudinally fitted onto the front and rear sides of the measuring cylinder through pressure caps at intervals. The pressure caps on the front and rear sides of the measuring cylinder are connected and fixed by connecting bolts and fastening nuts. The feature is that a heat tracing pipe is installed inside the level measuring chamber. The upper and lower ends of the heat tracing pipe are horizontally sealed through the upper and lower cylinder walls of the measuring cylinder, and quick connectors are installed at the ends of the heat tracing pipes horizontally sealed through the upper and lower cylinder walls of the measuring cylinder. An outer cylinder is also fitted onto the outside of the measuring cylinder, and insulation cotton is filled between the measuring cylinder and the outer cylinder.

[0006] The glass plate level gauge with the above structure can be connected to a high-temperature steam source via quick connectors at the ends of the heating pipes located at the top and bottom of the measuring cylinder. Heating the water sample in the level measuring chamber through the heating pipes enhances the temperature consistency between the water sample in the steam drum and the water sample in the measuring cylinder, thereby improving the measurement accuracy of the level gauge. In this invention, by setting an outer cylinder and filling the space between the measuring cylinder and the outer cylinder with insulation cotton, the heat preservation performance of this invention can be effectively improved and heat loss can be reduced.

[0007] As an improvement of this utility model, electrodes are sealed at the high and low liquid levels of the measuring cylinder by electrode seats. Each electrode includes an electrode core and a metal sleeve. One end of the sleeve extending into the measuring cylinder is connected to a ceramic tube and a sealing plug in sequence, and the other end of the cylinder is filled with an insulating sleeve. Both ends of the electrode core are sealed through the sealing plug and the insulating sleeve, respectively.

[0008] When using a glass plate level gauge with the above structure, the signal output terminals of the electrodes at the high and low liquid levels should be connected to an intelligent secondary instrument respectively. The non-electrical liquid level is converted into an electrical quantity and sent to the intelligent secondary instrument, thereby realizing the liquid level alarm function. This allows the water level in the boiler drum to be controlled within a certain height range, avoiding potential safety hazards.

[0009] As a further improvement of this utility model, the ceramic tube has a bead-like structure.

[0010] Furthermore, the ceramic tube has a single bead structure.

[0011] Furthermore, the ceramic tube has a double-bead structure.

[0012] By further adopting the above-mentioned technical features, since the ceramic tube has a bead-like structure, when condensate falls onto the surface of the ceramic tube, it will flow to both sides along the sloping surfaces on both sides of the bead-like ceramic tube. This causes the connection between the metal sleeves and the metal sealing plugs on both sides to be broken at the outer convex ridge of the middle part of the bead-like ceramic tube. Consequently, the metal on both sides of the ceramic tube is not easily conductive, which can effectively avoid the phenomenon of misconnection of metal on both sides of the ceramic tube and improve the stability of the measurement. At the same time, since the middle part of the ceramic tube in this utility model is thicker and the two sides are sloping, the ceramic tube is not easy to break, which also increases the service life of the electrode. The double bead-like structure of the ceramic tube in this utility model can more effectively avoid the phenomenon of misconnection of metal on both sides of the ceramic tube, which can further enhance the measurement stability of this utility model. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] Figure 1This is a schematic diagram of the structural composition of a glass plate level gauge according to this utility model.

[0015] Figure 2 It is along Figure 1 Schematic diagram of the cross section along line AA.

[0016] Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point I.

[0017] Figure 4 This is a cross-sectional structural schematic diagram of one embodiment of the electrode described in this utility model.

[0018] Figure 5 This is a cross-sectional structural schematic diagram of another embodiment of the electrode described in this utility model.

[0019] Figure 6 This is a cross-sectional view of an electrode in the prior art. Detailed Implementation

[0020] See Figure 1 - Figure 5 This utility model discloses a glass plate level gauge, comprising a measuring cylinder 1, a cylindrical level measuring chamber 2 formed within the measuring cylinder, a steam valve 3 mounted at the top of the measuring cylinder, a water valve 4 mounted at the bottom, a drain valve 5 connected to the bottom of the water valve, and glass plate windows 7 longitudinally press-fitted onto the front and rear sides of the measuring cylinder via pressure caps 6 at intervals. The pressure caps on the front and rear sides of the measuring cylinder are connected and fixed by connecting bolts 8 and fastening nuts 9. The feature is that a heat tracing pipe 10 is provided inside the level measuring chamber 2, with the upper and lower ends of the heat tracing pipe horizontally sealed through the upper and lower cylinder walls of the measuring cylinder, and quick connectors 11 are respectively installed at the ends of the heat tracing pipe horizontally sealed through the upper and lower cylinder walls of the measuring cylinder; an outer cylinder 13 is also fitted around the outside of the measuring cylinder 1, and insulation cotton 12 is filled between the measuring cylinder 1 and the outer cylinder. Electrodes 15 are sealed at the high and low liquid levels of the measuring cylinder 1 via electrode holders 14. Each electrode includes an electrode core 151 and a metal sleeve 152. One end of the sleeve extending into the measuring cylinder is connected to a ceramic tube 153 and a sealing plug 154, while the other end contains an insulating sleeve 155. The two ends of the electrode core are sealed through the sealing plug and the insulating sleeve, respectively. The ceramic tube 153 has a bead-like structure, approximating the bead structure of an abacus. When the ceramic tube 153 has a single bead structure, it approximates the shape of a single bead on an abacus. The two sides 1532 of the single-bead ceramic tube, with the outer convex ridge 1531 of the middle portion as the boundary, are inclined towards the axis of the ceramic tube. Furthermore, when the ceramic tube 153 has a double bead structure, it is approximately the shape of two beads of an abacus placed together. In the double bead structure ceramic tube, the two sides 1532 of each bead are inclined towards the axis of the ceramic tube with the outer convex ridge 1531 of the middle part as the boundary.

[0021] See also Figure 6 , Figure 6 This is a cross-sectional view of the electrode structure in the prior art. In the prior art, the ceramic tube at one end of the electrode sleeve is a cylindrical tube. Its disadvantage is that it is easy for the metal on both sides of the cylindrical ceramic tube to conduct, resulting in poor measurement stability.

[0022] It is understood that the above specific description of the present utility model is only used to illustrate the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Any modifications or equivalent substitutions to the present utility model to achieve the same technical effect are within the protection scope of the present utility model.

Claims

1. A glass plate level gauge, comprising a measuring cylinder (1), a cylindrical level measuring chamber (2) formed within the measuring cylinder, a steam valve (3) mounted at the top of the measuring cylinder, a water valve (4) mounted at the bottom, a drain valve (5) connected to the bottom of the water valve, and glass plate windows (7) longitudinally press-fitted onto the front and rear sides of the measuring cylinder at intervals via pressure caps (6), the pressure caps on the front and rear sides of the measuring cylinder being connected and fixed by connecting bolts (8) and fastening nuts (9), characterized in that: The liquid level measuring chamber (2) is equipped with a heat tracing pipe (10). The upper and lower ends of the heat tracing pipe are horizontally sealed through the upper and lower cylinder walls of the measuring cylinder. The ends of the heat tracing pipe that are horizontally sealed through the upper and lower cylinder walls of the measuring cylinder are respectively equipped with quick connectors (11). An outer cylinder (13) is also fitted on the outside of the measuring cylinder (1). Insulation cotton (12) is filled between the measuring cylinder (1) and the outer cylinder.

2. The glass plate level gauge as described in claim 1, characterized in that: Electrodes (15) are sealed at the high and low liquid levels of the measuring cylinder (1) via electrode seats (14). Each electrode includes an electrode core (151) and a metal sleeve (152). One end of the sleeve extends into the measuring cylinder and is connected to a ceramic tube (153) and a sealing plug (154) in sequence. An insulating sleeve (155) is installed inside the other end of the cylinder. Both ends of the electrode core are sealed through the sealing plug and the insulating sleeve, respectively.

3. The glass plate level gauge as described in claim 2, characterized in that: The ceramic tube (153) has a bead-like structure.

4. The glass plate level gauge as described in claim 3, characterized in that: The ceramic tube (153) has a single bead structure.

5. The glass plate level gauge as described in claim 3, characterized in that: The ceramic tube (153) has a double bead structure.

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