An electric contact water level gauge

Abstract

This utility model discloses an electric contact water level gauge, comprising a measuring cylinder with metal electrode holders on opposite sides. An electrode with one end extending into the measuring cylinder is installed within each electrode holder. A drain pipe is connected to the bottom of the measuring cylinder. A steam connection pipe and a liquid connection pipe are respectively connected to the upper and lower parts of the same side of the measuring cylinder. The electrode includes an electrode core and a metal sleeve. A ceramic tube and a sealing plug are sequentially connected to one end of the sleeve extending into the measuring cylinder, while an insulating sleeve 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. The ceramic tube has a bead-type structure, which can be a single bead structure or a double bead structure. During use, the metal on both sides of the ceramic tube in the electrode is not easily conductive, and the ceramic tube is not easily broken.

Description

Technical Field

[0001] This utility model relates to an electric contact water level gauge. Background Technology

[0002] Electric contact level gauges are mainly used for monitoring the liquid level in various steam drums and measuring the water level in high and low pressure heaters, deaerators, evaporators, and water tanks. They also have alarm output functions. Electric contact level gauges mainly consist of a measuring cylinder, electrodes, and secondary instruments.

[0003] Electrical contact level gauges measure liquid level by utilizing the difference in conductivity between boiler water and steam. As the liquid level changes, part of the electrode is immersed in water, while the other part is placed in steam. The electrode in the boiler water has low resistance to the metal cylinder, while the electrode in the steam has high resistance. Utilizing this characteristic, the non-electrical quantity of water level can be converted into an electrical quantity, which is then sent to an intelligent secondary instrument to achieve functions such as water level display and alarm output.

[0004] The ceramic part at the front end of the electrode of the existing electric contact water level gauge is cylindrical, meaning that the cylinder is horizontal after the electrode is installed. During use, condensation formed by steam on the ceramic surface is easy to adhere to the ceramic surface. Since the cylinder is horizontal, it is easy to cause metal conduction on both sides of the ceramic tube, resulting in incorrect water level gauge display. In addition, sometimes batches of ceramic tubes break during use, which is caused by improper operation when opening and closing valves and impact from high-pressure water flow. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an electrical contact water level gauge in which the metal on both sides of the ceramic tube is not easily conductive during use, and the ceramic tube is not easily broken.

[0006] To solve the above-mentioned technical problems, this utility model provides an electric contact water level gauge, which has a measuring cylinder, metal electrode seats on opposite sides of the measuring cylinder, an electrode with one end extending into the measuring cylinder inside the electrode seat, a drain pipe connected to the bottom of the measuring cylinder, and a steam connection pipe and a liquid connection pipe respectively connected to the upper and lower parts of the same side of the measuring cylinder. The electrode includes an electrode core and a metal sleeve. A ceramic tube and a sealing plug are connected in sequence to one end of the sleeve extending into the measuring cylinder, and an insulating sleeve is installed inside the other end of the cylinder. The two ends of the electrode core are respectively sealed through the sealing plug and the insulating sleeve. The characteristic feature is that the ceramic tube has a bead-type structure.

[0007] The ceramic tube can be a single bead structure.

[0008] The ceramic tube can also be a double bead structure.

[0009] The electric contact level gauge with the above-described structure, due to the bead-like structure of the ceramic tube, allows condensate to flow along the sloping sides of the tube when it falls onto its surface. This disconnects the metal sleeves and sealing plugs on both sides, with the outer ridge of the middle section of the bead-like ceramic tube serving as the boundary. Consequently, the metal on both sides of the ceramic tube is less likely to conduct electricity, effectively preventing misconnection and improving the stability of the electric contact level gauge. Furthermore, the thicker middle section and sloping sides of the ceramic tube make it less prone to breakage, increasing the lifespan of the electrodes. The double-bead structure of the ceramic tube further enhances the stability of the measurement, making it even more effective in preventing misconnection.

[0010] As an improvement of this utility model, a buffer cylinder is connected to the lower part of the measuring cylinder on the other side opposite to the liquid connecting pipe, and the axis of the buffer cylinder and the axis of the liquid connecting pipe are on the same straight line.

[0011] Furthermore, the inner diameter of the buffer cylinder is larger than the inner diameter of the liquid connecting pipe.

[0012] Furthermore, the inner diameter of the buffer cylinder is twice the inner diameter of the liquid connecting pipe.

[0013] By further adopting the above-mentioned technical features, when high-pressure water is ejected from the liquid connecting pipe and buffered by the buffer cylinder on the opposite side, it can slowly fill the lower part of the measuring cylinder, reducing the direct impact of the water flow on the electrode ceramic tube, thereby effectively preventing the electrode ceramic tube from breaking; the inner diameter of the buffer cylinder is larger than the inner diameter of the liquid connecting pipe, which can further ensure the buffering effect of the buffer cylinder on the high-pressure water flow; preferably, the inner diameter of the buffer cylinder is twice the inner diameter of the liquid connecting pipe. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of an electric contact water level gauge according to this utility model.

[0016] Figure 2 yes Figure 1 Enlarged cross-sectional view of the structure at point I.

[0017] Figure 3 This is a cross-sectional structural diagram of the electrode used in existing electric contact level gauges.

[0018] Figure 4 This is a cross-sectional structural schematic diagram of one embodiment of the electrode described in this utility model.

[0019] Figure 5This is a cross-sectional structural schematic diagram of another embodiment of the electrode described in this utility model. Detailed Implementation

[0020] See first Figure 3 , Figure 3 This is a cross-sectional structural diagram of the electrode used in the prior art for electric contact water level gauges. 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, causing the water level gauge to display incorrectly.

[0021] See also Figure 1 Figure 2 and Figure 4 Figure 5 This utility model discloses an electric contact water level gauge, comprising a measuring cylinder 1, metal electrode seats 2 mounted on opposite sides of the measuring cylinder, an electrode 3 with one end extending into the measuring cylinder being installed inside the electrode seats, a drain pipe 4 connected to the bottom of the measuring cylinder, and a steam connecting pipe 5 and a liquid connecting pipe 6 respectively connected to the upper and lower parts of the same side of the measuring cylinder. The electrode 3 includes a metal electrode core 31 and a metal sleeve 32. One end of the sleeve extending into the measuring cylinder is sequentially connected to a ceramic tube 33 and a metal sealing plug 34, and the other end of the cylinder contains an insulating sleeve 35. The two ends of the electrode core are respectively sealed through the sealing plug and the insulating sleeve. The characteristic feature is that the ceramic tube 33 has a bead-type structure, which is similar to the bead structure of an abacus. When the ceramic tube 33 is a single bead structure, it is approximately the shape of a single bead of an abacus. The two sides 332 of the single bead ceramic tube, with the outer convex ridge 331 of the middle part as the boundary, are inclined towards the axis of the ceramic tube. Furthermore, when the ceramic tube 33 has a double-bead structure, it approximates the shape of two beads of an abacus placed close together. In the double-bead structure ceramic tube, both sides 332 of each bead are inclined towards the axis of the ceramic tube, with the outer convex ridge 331 of the middle portion as the boundary. A buffer cylinder 7 is connected to the lower part of the measuring cylinder 1 on the other side opposite to the liquid connecting pipe 6. The axis of the buffer cylinder is on the same straight line as the axis of the liquid connecting pipe. The inner diameter of the buffer cylinder 7 is larger than the inner diameter of the liquid connecting pipe 6. The inner diameter of the buffer cylinder 7 is twice the inner diameter of the liquid connecting pipe 6.

[0022] See also Figure 2 In this invention, the electrode 3 is installed in the electrode holder 2 via a graphite ring 8, a washer 9, and a locking nut 10.

[0023] 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. An electric contact water level gauge, comprising a measuring cylinder (1), metal electrode holders (2) mounted on opposite sides of the measuring cylinder, an electrode (3) having one end extending into the measuring cylinder being mounted inside the electrode holder, a drain pipe (4) connected to the bottom of the measuring cylinder, and a steam pipe (5) and a liquid pipe (6) respectively connected to the upper and lower parts of the same side of the measuring cylinder, wherein the electrode (3) comprises an electrode core (31) and a metal sleeve (32), a ceramic tube (33) and a sealing plug (34) are sequentially connected to one end of the sleeve extending into the measuring cylinder, and an insulating sleeve (35) is mounted inside the other end of the cylinder, and both ends of the electrode core are sealed through the sealing plug and the insulating sleeve respectively, characterized in that: The ceramic tube (33) has a bead-like structure.

2. The electric contact water level gauge as described in claim 1, characterized in that: The ceramic tube (33) has a single bead structure.

3. The electric contact water level gauge as described in claim 1, characterized in that: The ceramic tube (33) has a double bead structure.

4. The electric contact water level gauge according to any one of claims 1 to 3, characterized in that: A buffer cylinder (7) is connected to the lower part of the measuring cylinder (1) opposite to the liquid connecting pipe (6), and the axis of the buffer cylinder is on the same straight line as the axis of the liquid connecting pipe.

5. The electric contact water level gauge as described in claim 4, characterized in that: The inner diameter of the buffer cylinder (7) is larger than the inner diameter of the liquid connecting pipe (6).

6. The electric contact water level gauge as described in claim 5, characterized in that: The inner diameter of the buffer cylinder (7) is twice the inner diameter of the liquid connecting pipe (6).

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