Non-contact liquid level detection device for heating furnace

Abstract

The utility model relates to the technical field of liquid level detection equipment, in particular to a non-contact liquid level detection device for a heating furnace, which comprises a heating furnace body and a connecting piece communicated with the heating furnace body, a heating disc is arranged in the heating furnace body, and the connecting piece is arranged along the height direction of the heating furnace body. The connecting piece is provided with at least two sensing assemblies including an upper sensing assembly and a lower sensing assembly; the upper sensing assembly comprises an upper liquid level sensor arranged on the outer side of the connecting piece, and the lower sensing assembly comprises a lower liquid level sensor arranged on the outer side of the connecting piece. By arranging the connecting piece communicated with the heating furnace body and using the connecting piece as a medium, the upper liquid level sensor and the lower liquid level sensor are prevented from being in contact with the heating furnace body, the heating furnace body is prevented from interfering and influencing the liquid level sensors, and therefore the liquid level sensors can conduct detection on the outer side of the heating furnace body; the liquid level sensor cannot be attached by incrustation in the heating furnace body, long-time operation is guaranteed, and the service life is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid level detection equipment, and particularly relates to a non-contact liquid level detection device for a heating furnace. BACKGROUND

[0002] The heating furnace is a device for heating liquid, which mainly converts water medium into high-temperature water or saturated steam through electric energy, and has high heat conversion efficiency by using an efficient heat exchange system and optimized temperature rising technology.

[0003] During the heating process, the internal liquid level of the heating furnace needs to be monitored to facilitate the control of the heating time and the heating temperature. In order to ensure the heating efficiency, the heating furnace is mainly made of metal. If a liquid level sensor is arranged on the outside of the heating furnace, it will be affected by the metal and cannot work. Therefore, the conventional liquid level acquisition method is to arrange the liquid level sensor in contact with the liquid level in the furnace to acquire the liquid level. However, during the use of the heating furnace, scale will continuously adhere to the liquid level sensor, which will cause the liquid level sensor to malfunction or even be damaged. CONTENT

[0004] The purpose of the present application is to provide a non-contact liquid level detection device for a heating furnace, which aims to improve the problem of easy malfunction of the existing heating furnace liquid level acquisition structure and increase the service life of the liquid level acquisition structure.

[0005] The non-contact liquid level detection device for the heating furnace provided by the present application comprises a heating furnace body, a heating disc arranged in the heating furnace body, a connecting piece communicating with the heating furnace body, the connecting piece being arranged along the height direction of the heating furnace body, and at least two sensing components, i.e., an upper sensing component and a lower sensing component, arranged on the connecting piece. The upper sensing component comprises an upper liquid level sensor arranged on the outer side of the connecting piece, and the lower sensing component comprises a lower liquid level sensor arranged on the outer side of the connecting piece.

[0006] Further, the heating furnace body is provided with a plurality of communication holes, the connecting piece comprises a fastener installed in the communication hole, and the upper liquid level sensor and the lower liquid level sensor are arranged on the fastener.

[0007] Further, the upper part and the lower part of the heating furnace body are respectively provided with a connecting hole, the connecting piece comprises a pipe connected to the connecting hole, and the upper sensing component and the lower sensing component are arranged along the length direction of the pipe.

[0008] Further, the upper sensing component comprises an upper pole piece arranged on the outer side of the pipe, and the upper liquid level sensor is arranged on the upper pole piece; and the lower sensing component comprises a lower pole piece arranged on the outer side of the pipe, and the lower liquid level sensor is arranged on the lower pole piece.

[0009] Further, the connecting hole positions are respectively located on one side above the heating furnace body and one side below the heating furnace body.

[0010] Further, the lower liquid level sensor is located above the heating disc, and the upper liquid level sensor is located above the lower liquid level sensor.

[0011] Advantages of the present application:

[0012] 1. The non-contact liquid level detection device for the heating furnace of the present application, by setting the connecting piece in communication with the heating furnace body, and setting the upper sensing assembly and the lower sensing assembly on the connecting piece, using the connecting piece as an intermediary, avoiding the upper liquid level sensor and the lower liquid level sensor from contacting the heating furnace body, preventing the heating furnace body from interfering with the liquid level sensor, so as to realize the detection of the liquid level sensor outside the heating furnace body, and the liquid level sensor will not be attached by the scale inside the heating furnace body, ensuring long-time operation and effectively increasing the service life.

[0013] 2. The non-contact liquid level detection device for the heating furnace of the present application, the connecting piece can be realized in various forms such as fasteners and pipes, and the upper sensing assembly and the lower sensing assembly are adapted according to the form of the connecting piece, so as to meet the non-contact liquid level detection requirements of the heating furnace in different environments, and have better adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of a non-contact liquid level detection device for a heating furnace provided by an embodiment one of the present application;

[0015] Figure 2 is another structural schematic view of a non-contact liquid level detection device for a heating furnace provided by an embodiment one of the present application;

[0016] Figure 3 is a structural schematic view of a non-contact liquid level detection device for a heating furnace provided by an embodiment two of the present application.

[0017] BRIEF DESCRIPTION OF DRAWINGS

[0018] 1, heating furnace body; 11, heating disc; 12, connecting hole position; 2, connecting piece; 21, fastener; 22, pipe; 3, upper sensing assembly; 31, upper liquid level sensor; 32, upper pole piece; 4, lower sensing assembly; 41, lower liquid level sensor; 42, lower pole piece. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0020] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a manner different from the module division in the device or the sequence in the flowchart. The terms "first", "second", etc. in the specification and claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0022] Embodiment one

[0023] With reference to Figure 1 And Figure 2 The embodiment of the present application provides a non-contact liquid level detection device for a heating furnace, which comprises a heating furnace body 1, a heating disc 11 is arranged in the heating furnace body 1, the heating disc 11 is located at the bottom of the heating furnace body 1, the heating disc 11 is connected with an external power supply, and the heating disc 11 heats the liquid in the heating furnace body 1 when it operates.

[0024] In order to obtain the liquid level height in the heating furnace body 1 in time and ensure the service life, the non-contact liquid level detection device further comprises a connecting piece 2 communicating with the heating furnace body 1, the connecting piece 2 is provided with at least two sensing components, an upper sensing component 3 and a lower sensing component 4, the upper sensing component 3 serves as a high liquid level measuring point, and the lower sensing component 4 serves as a low liquid level measuring point. It should be noted that the number and position of the sensing components can be adjusted according to actual needs.

[0025] Specifically, the connecting piece 2 is arranged along the height direction of the heating furnace body 1, in the embodiment, in order to adapt to the installation of the connecting piece 2, connection hole positions 12 are respectively arranged above and below the heating furnace body 1, that is, the connecting piece 2 is installed in the form of upper and lower openings, it can be understood that the connection hole positions 12 can also be respectively arranged on one side above the heating furnace body 1 and on one side below the heating furnace body 1, that is, the connecting piece 2 is installed in the form of side opening. The connecting piece 2 comprises a pipe 22 connected to the connection hole position 12, the two ends of the pipe 22 are respectively connected with the connection hole position 12, so that the pipe 22 communicates with the heating furnace body 1.

[0026] The upper sensing component 3 and the lower sensing component 4 are arranged along the length of the pipe fitting 22. The upper sensing component 3 includes an upper liquid level sensor 31 disposed on the outside of the connector 2, and the lower sensing component 4 includes a lower liquid level sensor 41 disposed on the outside of the connector 2. The lower liquid level sensor 41 is located above the heating plate 11, and the upper liquid level sensor 31 is located above the lower liquid level sensor 41. It can be understood that the distance between the upper liquid level sensor 31 and the lower liquid level sensor 41, as well as the distance between the lower liquid level sensor 41 and the heating plate 11, can be specifically set and adjusted according to actual needs or the liquid level of the heating furnace body 1.

[0027] In this embodiment, the upper liquid level sensor 31 and the lower liquid level sensor 41 are capacitive liquid level sensors. To cooperate with the capacitive liquid level sensor, the upper sensing component 3 includes an upper electrode plate 32, which is an annular electrode plate. The upper electrode plate 32 covers and is disposed on the outside of the tube 22, and the upper liquid level sensor 31 is disposed on the upper electrode plate 32. Similarly, the lower sensing component 4 includes a lower electrode plate 42, which is an annular electrode plate. The lower electrode plate 42 covers and is disposed on the outside of the tube 22, and the lower liquid level sensor 41 is disposed on the lower electrode plate 42. The tube 22 can specifically be a silicone hose.

[0028] According to the principle of communicating vessels, the liquid level in pipe 22 is the same as the liquid level in heating furnace 1. When the liquid level in heating furnace 1 is above or below the lower electrode 42 or the upper electrode 32, the dielectric constant of the plates between the lower electrode 42 and the upper electrode 32 will change, thereby changing their capacitance. When the capacitance changes, it can be known that the liquid level has exceeded or fallen below the height of the sensing component. It is understandable that the upper sensing component 3 and the lower sensing component 4 can also be implemented in other ways, such as infrared or ultrasonic.

[0029] Example 2

[0030] Reference Figure 3 The difference between this embodiment and Embodiment 1 is that the form of the connector 2 is different.

[0031] Specifically, in some operating environments, it is not convenient to connect hoses or extend them in other ways to the heating furnace body 1. Therefore, in this embodiment, the heating furnace body 1 is provided with several communicating holes, and the connector 2 includes a fastener 21 that passes through and is installed in the communicating hole 12; an upper liquid level sensor 31 and a lower liquid level sensor 41 are disposed on the fastener 21.

[0032] The connecting hole is directly connected to the interior of the heating furnace body 1. Multiple fasteners 21 are set to block the connecting hole and simultaneously serve to contact the liquid surface. When the liquid level is above or below the fastener 21, the capacitance between the fasteners 21 will change. The change in the liquid level can also be detected by the upper liquid level sensor 31 or the lower liquid level sensor 41, thereby issuing a prompt or alarm. The fastener 21 can be a silicone plug.

[0033] In Embodiment 2, by drilling holes in the heating furnace body 1 and using the fastener 21 in conjunction with the upper sensing component 3 and the lower sensing component 4, non-contact liquid level detection of the heating furnace body 1 can be achieved without extending the connecting pipe 22.

[0034] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A non-contact liquid level detection device for a heating furnace, comprising a heating furnace body (1), wherein a heating plate (11) is disposed within the heating furnace body (1), characterized in that, It also includes a connector (2) that connects to the heating furnace body (1). The connector (2) is arranged along the height direction of the heating furnace body (1). The connector (2) is provided with at least two sensing components, including an upper sensing component (3) and a lower sensing component (4). The upper sensing component (3) includes an upper liquid level sensor (31) disposed on the outside of the connector (2), and the lower sensing component (4) includes a lower liquid level sensor (41) disposed on the outside of the connector (2).

2. The non-contact liquid level detection device for a heating furnace according to claim 1, characterized in that, The heating furnace body (1) has several connecting holes, and the connector (2) includes a fastener (21) that passes through and is installed in the connecting hole (12); the upper liquid level sensor (31) and the lower liquid level sensor (41) are disposed on the fastener (21).

3. The non-contact liquid level detection device for a heating furnace according to claim 1, characterized in that, The heating furnace body (1) has connection holes (12) on the top and bottom respectively. The connector (2) includes a pipe (22) connected to the connection hole (12). The upper sensing component (3) and the lower sensing component (4) are arranged along the length of the pipe (22).

4. A non-contact liquid level detection device for a heating furnace according to claim 3, characterized in that, The upper sensing component (3) includes an upper electrode plate (32), which is disposed on the outside of the pipe (22), and the upper liquid level sensor (31) is disposed on the upper electrode plate (32); the lower sensing component (4) includes a lower electrode plate (42), which is disposed on the outside of the pipe (22), and the lower liquid level sensor (41) is disposed on the lower electrode plate (42).

5. A non-contact liquid level detection device for a heating furnace according to claim 3, characterized in that, The connection holes (12) are located on one side above the heating furnace body (1) and on one side below the heating furnace body (1), respectively.

6. A non-contact liquid level detection device for a heating furnace according to any one of claims 1-5, characterized in that, The lower liquid level sensor (41) is located above the heating plate (11); the upper liquid level sensor (31) is located above the lower liquid level sensor (41).

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