Cleaning-free static pressure type liquid level instrument

Abstract

The utility model provides a clean-free static pressure type liquid level instrument, which relates to the technical field of liquid level instruments and comprises a liquid level instrument body, an S pipe and an air pipe, the S pipe and the air pipe are positioned inside the liquid level instrument body, one end of the S pipe is communicated with the bottom of the liquid level instrument body, and the other end of the S pipe is communicated with one end of the air pipe to form a measuring chamber. A one-way valve is installed at the other end of the air pipe, and an air pressure measuring device communicated with the measuring cavity is installed on the liquid level instrument body. The liquid level measuring device can be fixed on a liquid container, liquid can extrude air in the S-shaped pipe and the air pipe, the air pressure in the measuring cavity is increased, and then the pressure sensor can measure the pressure change conveniently to obtain the liquid level; impurities in the pipeline can be discharged by conveying air into the air pipe through the air pump, and the impurities in the air pipe and the S-shaped pipe are cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level meters, in particular to a cleaning-free static pressure liquid level meter. Background Art

[0002] The static pressure level gauge is an instrument for measuring liquid level, which is widely used in many fields such as petroleum, chemical industry, food, etc. During the use of traditional static pressure level gauges, if the measured working fluid contains or is prone to produce sediment or condensate, the pressure pipe or pressure diaphragm needs to be cleaned regularly to prevent measurement errors caused by impurities or dirt.

[0003] However, this regular cleaning process not only increases the cost of use, but also affects the operating conditions of the static pressure level gauge to a certain extent. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a cleaning-free static pressure liquid level instrument to facilitate the cleaning of the pressure guiding pipe.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a cleaning-free static pressure liquid level meter, including a liquid level meter body, an S-tube, and an air pipe. The S-tube and the air pipe are located inside the liquid level meter body, one end of the S-tube is connected to the bottom of the liquid level meter body, and the other end of the S-tube is connected to one end of the air pipe to form a measuring chamber. A one-way valve is installed at the other end of the air pipe, and an air pressure measuring device connected to the measuring chamber is installed on the liquid level meter body.

[0006] Preferably, the one-way valve is communicated with the liquid level meter body, and an air passage of the one-way valve is guided from the outside of the liquid level meter body to the measuring chamber.

[0007] Preferably, the one-way valve is connected to an air pump.

[0008] Preferably, the measuring device comprises a data processing component, a control component and a pressure sensor, the pressure sensor is installed in the measuring chamber, the pressure sensor is electrically connected to the data processing component, and the data processing component is electrically connected to the control component.

[0009] Preferably, the air pump is electrically connected to the control component.

[0010] Preferably, the opening of one end of the S-tube connected to the air pipe faces upward, and the opening of the S-tube communicating with the liquid level meter body faces downward.

[0011] Compared with the prior art, the cleaning-free static pressure liquid level meter proposed by the utility model adopts the above technical solution and achieves the following technical effects:

[0012] The utility model can be fixed on a container for holding liquid, and the liquid can squeeze the air in the S tube and the air pipe and increase the air pressure in the measuring chamber, thereby facilitating the pressure sensor to measure the pressure change and obtain the liquid level.

[0013] The utility model can discharge impurities in the pipeline by conveying gas into the air pipe through the air pump, so as to clean the impurities in the air pipe and the S pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a principle structure diagram of the utility model.

[0015] In the figure: 1. Liquid level meter body; 2. S tube; 7. Air pipe; 3. Measuring chamber; 4. One-way valve; 5. Air pump; 61. Data processing component; 62. Control component; 63. Pressure sensor. DETAILED DESCRIPTION

[0016] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0018] Example

[0019] Please refer to Figure 1The utility model proposes a clean-free static pressure liquid level meter, including a liquid level meter body 1, an S tube 2, and an air tube 7. The S tube 2 and the air tube 7 are located inside the liquid level meter body 1. One end of the S tube 2 is connected to the bottom of the liquid level meter body 1, and the other end of the S tube 2 is connected to one end of the air tube 7 to form a measuring chamber 3. A one-way valve 4 is installed at the other end of the air tube 7. The liquid level meter body 1 is installed with an air pressure measuring device connected to the measuring chamber 3. In the utility model, the entire liquid level meter is placed in a container containing liquid. Since the pressure of the liquid will increase with the depth, the liquid level meter has an air tube 7 and an S tube 2, wherein one end of the air tube 7 is unidirectional, then the liquid will compress the gas in the air tube 7 and the S tube 2, the measuring chamber 3 is connected to the S tube 2 and the air tube 7, and the air pressure in the measuring chamber 3 will also increase. The hydraulic pressure data is obtained by measuring the change of the air pressure; in the utility model, the S tube 2 can prevent the hydraulic pressure from being too large and press the liquid into the air tube 7.

[0020] In a specific embodiment, refer to Figure 1 The one-way valve 4 is connected to the liquid level meter body 1, and the air passage of the one-way valve 4 is guided from the outside of the liquid level meter body 1 to the measuring chamber 3. The measuring chamber 3 is used to provide a measuring space for air pressure, and can also increase the air storage capacity in the air pipe 7 and the S pipe 2.

[0021] In a specific embodiment, refer to Figure 1 The one-way valve 4 is connected to an air pump 5. The air pump 5 is used to transport clean gas into the air pipe 7 to prevent impurities from affecting the measurement data. At the same time, it can increase the air pressure in the air pipe 7 and the S tube 2 so that there will be no small amount of liquid in the S tube 2. Generally, when the air pressure is high, a small amount of liquid will be pressed into the S tube 2. After the air pump 5 increases the pressure, the liquid in the S tube 2 will be discharged. At this time, the air pressure and hydraulic pressure in the measuring chamber 3 are balanced, and the liquid level will be exactly at the tube mouth of the S tube 2.

[0022] In a specific embodiment, refer to Figure 1 The measuring device includes a data processing component 61, a control component 62 and a pressure sensor 63. The pressure sensor 63 is installed in the measuring chamber 3. The pressure sensor 63 is electrically connected to the data processing component 61, and the data processing component 61 is electrically connected to the control component 62. The pressure sensor 63 is used to measure the air pressure in the measuring chamber 3 and obtain the liquid level information of the liquid through the data processing component 61. The control component 62 can control the operation of the air pump 5 and the working state of the pressure sensor 63.

[0023] In a specific embodiment, refer to Figure 1 , the air pump 5 is electrically connected to the control component 62. The control component 62 can control the air pump 5 to run and deliver gas into the air pipe 7.

[0024] In a specific embodiment, refer to Figure 1The end of the S tube 2 connected to the air pipe 7 is open upward, and the opening of the S tube 2 connected to the liquid level meter body 1 is open downward. The S tube 2 needs to avoid excessive hydraulic pressure causing liquid to enter the measurement chamber 3 and affect the measurement data. Furthermore, the S tube 2 can also be implemented by a longer straight tube.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A clean-free static pressure level meter, characterized in that: The invention comprises a liquid level meter body (1), an S-tube (2), and an air pipe (7); the S-tube (2) and the air pipe (7) are located inside the liquid level meter body (1); one end of the S-tube (2) is connected to the bottom of the liquid level meter body (1); the other end of the S-tube (2) is connected to one end of the air pipe (7) to form a measuring chamber (3); a one-way valve (4) is installed at the other end of the air pipe (7); and an air pressure measuring device connected to the measuring chamber (3) is installed on the liquid level meter body (1).

2. The cleaning-free static pressure level meter according to claim 1, characterized in that: The one-way valve (4) is in communication with the liquid level meter body (1), and an air passage of the one-way valve (4) is guided from the outside of the liquid level meter body (1) to the measuring chamber (3).

3. The cleaning-free static pressure level meter according to claim 1, characterized in that: The one-way valve (4) is connected to an air pump (5).

4. The cleaning-free static pressure level meter according to claim 3, characterized in that: The measuring device comprises a data processing component (61), a control component (62) and a pressure sensor (63); the pressure sensor (63) is installed in the measuring chamber (3); the pressure sensor (63) is electrically connected to the data processing component (61); and the data processing component (61) is electrically connected to the control component (62).

5. The cleaning-free static pressure liquid level meter according to claim 4, characterized in that: The air pump (5) is electrically connected to the control component (62).

6. The cleaning-free static pressure level meter according to claim 1, characterized in that: The opening of the end of the S tube (2) connected to the air pipe (7) faces upward, and the opening of the S tube (2) communicating with the liquid level meter body (1) faces downward.

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