Capacitive liquid column micromanometer

Abstract

The utility model provides a capacitive liquid column micromanometer. The capacitive liquid column micromanometer comprises a water tank body, two air inlets are formed in the water tank body, a liquid column micromanometer is arranged on one side of the water tank body, the air inlets are communicated with the micromanometer, and the upper side and the lower side of the micromanometer are each provided with an electrode used for being connected with a measurement display device. According to the utility model, the micro differential pressure is measured by adopting a method for measuring liquid capacitance, on one hand, the height of a liquid column can be directly read by human eyes so as to read the differential pressure, and on the other hand, a pressure value can be obtained by automatically measuring the capacitance so as to provide a stable pressure measurement value for a coke oven fire adjusting system.

Description

Technical Field

[0001] The utility model relates to a capacitive liquid column micro-pressure gauge. Background Art

[0002] In the coke oven gas regulating fire system, it is necessary to measure the pressure at the top of the furnace. At present, traditional electronic micro-pressure transmitters are widely used, but they have large errors and low resolution at pressures of 50 - 200 Pa. Moreover, with the passage of time, the drift also changes continuously, resulting in unstable operation of the regulating fire system. Content of the Utility Model

[0003] In view of the defects existing in the existing micro-pressure gauges, the technical problem to be solved by the utility model is to provide a capacitive liquid column micro-pressure gauge with accurate pressure display.

[0004] To achieve the above object, according to one aspect of the utility model, the utility model is realized by the following technical measures: a capacitive liquid column micro-pressure gauge, comprising: a water tank main body, two air inlet holes are provided on the water tank main body, a liquid column micro-pressure gauge is provided on one side of the water tank main body, the air inlet holes are communicated with the micro-pressure gauge, and an electrode is provided on each of the upper and lower sides of the micro-pressure gauge for connecting a measurement and display device.

[0005] Further, one end of the liquid column micro-pressure gauge is provided with a solenoid valve connection end for connecting a solenoid valve.

[0006] Further, the liquid column micro-pressure gauge is U-shaped, and the two ends of the U-shaped liquid column micro-pressure gauge extend upward respectively to form pipe heads Ⅰ, and the two pipe heads Ⅰ are respectively inserted into the two air inlet holes for connection.

[0007] Further, the liquid column micro-pressure gauge is linear, the front and rear ends of the liquid column extend outward to form pipe heads Ⅱ, a reserved hole passage is connected in one air inlet hole, which is connected to the pipe head Ⅱ at the rear end of the liquid column micro-pressure gauge, and the pipe head Ⅱ connecting the front end of the liquid column micro-pressure gauge is inserted into the other air inlet hole for connection.

[0008] Compared with the prior art, the advantages of the utility model are as follows: the method of measuring the capacitance of the liquid is adopted to measure the micro-pressure difference. On the one hand, the height of the liquid column can be directly read by the human eye to obtain the pressure difference, and on the other hand, the pressure value can be obtained by automatically measuring the capacitance. The micro-pressure difference as low as 50 Pa with a resolution of 1 Pa can be measured, providing a stable pressure measurement value for the coke oven regulating fire system. Description of the Drawings

[0009] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0010] Figure 1Schematic diagram of the structure of a capacitive liquid column micro-pressure gauge according to the present utility model.

[0011] Figure 2 Schematic diagram of the cross-section of the air inlet hole according to the present utility model.

[0012] Figure 3 Schematic diagram of the structure of the liquid column micro-pressure gauge according to the first embodiment of the present utility model.

[0013] Figure 4 Schematic diagram of the structure of the liquid column micro-pressure gauge according to the second embodiment of the present utility model.

[0014] Figure 5 Schematic diagram of the cross-section of the solenoid valve connection end according to the present utility model.

[0015] Explanation of reference numerals: 1. Water tank main body; 2. Liquid column micro-pressure gauge; 3. Electrode; 4. Solenoid valve connection end; 5. Air inlet hole; 6. Pipe head I; 7. Pipe head II. Detailed implementation manners

[0016] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0017] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "bottom", "top", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0018] Please refer to Figure 1 、 Figure 5 , a capacitive liquid column micro-pressure gauge provided in this embodiment includes: a water tank main body 1, two air inlet holes 5 are provided on the water tank main body 1, a liquid column micro-pressure gauge 2 is provided on one side of the water tank main body 1, the air inlet holes 5 are communicated with the liquid column micro-pressure gauge 2, an electrode 3 is provided on each of the upper and lower sides of the liquid column micro-pressure gauge 2 for connecting a measurement and display device, and a solenoid valve connection end 4 is provided at one end of the liquid column micro-pressure gauge 2 for connecting a solenoid valve.

[0019] The measurement hole inside the furnace is connected to the air inlet hole 5 of the box body. The pressure value is measured by the liquid column micro-pressure gauge 2. Two electrodes 3 on both sides of the liquid column form a flat capacitor. The movement of the liquid column will cause a change in the capacitance of the electrode 3. The bottom measurement display device measures the pressure value through the change in capacitance. When used in a high-temperature environment, the liquid column of the micro-pressure gauge is prone to volatilization. One end of the liquid column micro-pressure gauge 2 is provided with a solenoid valve connection end 4 for connecting the solenoid valve. In the unused state, the water tank main body 1 and the liquid column micro-pressure gauge 2 are separated. When in use, the solenoid valve is opened to connect the liquid columns of the water tank main body 1 and the liquid column micro-pressure gauge 2, serving the function of replenishing the liquid for the liquid column.

[0020] As Figure 2 、 Figure 3 shown is the first embodiment of the present invention. The liquid column micro-pressure gauge 2 is U-shaped. The two ends of the U-shaped of the liquid column micro-pressure gauge 2 extend upward respectively to form tube heads I 6. The two tube heads I 6 are respectively inserted and connected to the two air inlet holes 5. The two air inlets are respectively connected to the tops of the two liquid columns. When there is no pressure difference between the two air inlets, the heights of the two water columns are the same. The capacitances of the two water columns are measured respectively. When the capacitances are equal, it indicates that the pressure difference is equal to 0. When there is a pressure difference between the two air inlets, the pressure value is obtained by calculating the capacitance difference.

[0021] As Figure 4 shown is the second embodiment of the present invention. The liquid column micro-pressure gauge 2 is linear. The front and rear ends of the liquid column extend outward to form tube heads II 7. A reserved hole passage is connected inside one air inlet hole 5, which is inserted and connected to the tube head II 7 at the rear end of the liquid column micro-pressure gauge 2. The tube head II 7 connecting the front end of the liquid column micro-pressure gauge 2 is inserted into the other air inlet hole 5 for connection. The two air inlets are respectively connected to the bottom end and the top end of the liquid column. When there is a pressure difference between the two air inlets, the height of the water column changes. By measuring the absolute value of the capacitance, the length of the water column is converted, and thus the current pressure difference is obtained.

[0022] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A capacitive liquid column micro pressure gauge, comprising: The water tank body is characterized in that: two air inlet holes are provided on the water tank body, a liquid column micro-pressure gauge is provided on one side of the water tank body, the air inlet hole and the micro-pressure gauge are connected, and an electrode is provided on the upper and lower sides of the micro-pressure gauge respectively for connecting to a measuring display device.

2. A capacitive liquid column micro pressure gauge according to claim 1, characterized in that: One end of the liquid column micro-pressure gauge is provided with a solenoid valve connecting end for connecting to a solenoid valve.

3. A capacitive liquid column micro pressure gauge according to claim 2, characterized in that: The liquid column micro pressure gauge is U-shaped, and both ends of the U-shape of the liquid column micro pressure gauge extend upward to form a tube head I respectively, and the two tube heads I are respectively inserted into two air inlets for connection.

4. A capacitive liquid column micro pressure gauge according to claim 2, characterized in that: The liquid column micropressure gauge is linear, and the front and rear ends of the liquid column extend outward to form a tube head II. A reserved channel is connected to one of the air inlet holes, which is plugged into the tube head II at the rear end of the liquid column micropressure gauge. The tube head II connected to the front end of the liquid column micropressure gauge is inserted into another air inlet hole for connection.

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