Ultrasonic liquid level meter and liquid level measuring device

Abstract

An ultrasonic liquid meter and a liquid level measuring device, the ultrasonic liquid meter comprising: an ultrasonic liquid level meter body, the bottom of the ultrasonic liquid level meter body being provided with a probe; a protective sleeve with a containing cavity, arranged at the bottom of the ultrasonic liquid level meter body, the containing cavity containing the probe, in the extension direction of the containing cavity, the containing cavity having a cavity bottom away from the ultrasonic liquid level meter body, and the cavity bottom and the probe having a gap therebetween; a heating module arranged at the cavity bottom of the protective sleeve for heating the protective sleeve; in this embodiment, since the cavity bottom of the bottom of the protective sleeve is provided with the heating module, the condensed water vapor at the bottom of the protective sleeve can be removed by the heating module, thereby reducing the interference of the water vapor on the ultrasonic liquid level meter, and further reducing the probability of false alarm of the ultrasonic liquid level meter.

Description

Technical Field

[0001] This utility model relates to the field of liquid level detection technology, and in particular to an ultrasonic liquid level meter and a liquid level measuring device. Background Technology

[0002] An ultrasonic level gauge is a digital level instrument controlled by a microprocessor. During measurement, ultrasonic pulses are emitted by a sensor (transducer). The sound waves are reflected by the liquid surface and received by the same sensor, converted into an electrical signal by a piezoelectric crystal, and the distance from the sensor to the measured liquid surface is calculated from the time between the emission and reception of the sound wave. Because it uses non-contact measurement, the measured medium is virtually unlimited, making it widely applicable for measuring the height of various liquids and solid materials.

[0003] In practical applications, ultrasonic level gauges are typically used in humid environments, such as those in the chemical, water treatment, and food processing industries. The high humidity and moisture in these environments can interfere with the measurement accuracy of ultrasonic level gauges.

[0004] Currently, how to reduce the interference caused by water vapor during ultrasonic level gauge measurement has become an urgent problem to be solved. Utility Model Content

[0005] The problem solved by this utility model embodiment is to provide an ultrasonic liquid level gauge and a liquid level measuring device, which helps to reduce the interference of water vapor on the ultrasonic liquid level gauge, thereby reducing the probability of false alarms of the ultrasonic liquid level gauge.

[0006] To address the aforementioned problems, this utility model provides an ultrasonic level gauge, comprising: an ultrasonic level gauge body, wherein a probe is provided at the bottom of the ultrasonic level gauge body; a protective sleeve having a accommodating cavity disposed at the bottom of the ultrasonic level gauge body, the accommodating cavity accommodating the probe, wherein the accommodating cavity has a cavity bottom on the side away from the ultrasonic level gauge body in the extending direction of the accommodating cavity, and there is a gap between the cavity bottom and the probe; and a heating module disposed at the cavity bottom of the protective sleeve for heating the protective sleeve.

[0007] Optionally, the ultrasonic level gauge further includes: a terminal block disposed on the side wall of the ultrasonic level gauge body; the connection end of the heating module is electrically connected to the terminal block.

[0008] Optionally, the connection end of the heating module includes a power supply lead or a conductive terminal.

[0009] Optionally, the heating module includes a heating wire or a heating film.

[0010] Optionally, when the heating module is a heating wire, the heating wire is distributed in a serpentine or wavy pattern at the bottom of the cavity.

[0011] Optionally, the bottom of the cavity of the protective sleeve has a groove, and the heating module is embedded in the groove; the ultrasonic level gauge further includes: thermally conductive adhesive, located in the groove and wrapping the heating module located in the groove, the thermally conductive adhesive filling all or part of the remaining space of the groove where the heating module is located.

[0012] Optionally, in the extending direction of the accommodating cavity, there is a gap between the heating module and the probe.

[0013] Optionally, the protective sleeve is detachably connected to the bottom of the ultrasonic level gauge body.

[0014] This utility model embodiment also provides a liquid level measuring device, including the ultrasonic liquid level gauge described in any embodiment of this utility model.

[0015] Optionally, the ultrasonic level gauge includes a connector disposed on the side wall of the ultrasonic level gauge body; the level measuring device further includes a power supply cable electrically connected to the connector.

[0016] Compared with the prior art, the technical solution of this utility model embodiment has the following advantages:

[0017] This utility model provides an ultrasonic level gauge, comprising: an ultrasonic level gauge body, wherein a probe is provided at the bottom of the ultrasonic level gauge body; a protective sleeve having a accommodating cavity disposed at the bottom of the ultrasonic level gauge body, the accommodating cavity accommodating the probe, the accommodating cavity having a cavity bottom on the side away from the ultrasonic level gauge body in the extending direction of the accommodating cavity, and a gap between the cavity bottom and the probe; and a heating module disposed at the cavity bottom of the protective sleeve for heating the protective sleeve. In this embodiment, since a heating module is provided at the cavity bottom of the protective sleeve, the condensed water vapor at the bottom of the protective sleeve can be removed by the heating module, thereby reducing the interference of water vapor on the ultrasonic level gauge and thus reducing the probability of false alarms by the ultrasonic level gauge.

[0018] Accordingly, this utility model provides a liquid level measuring device, including the ultrasonic liquid level gauge described in any embodiment of this utility model; since the liquid level measuring device includes the ultrasonic liquid level gauge described in the embodiment of this utility model, it is beneficial to improve the detection accuracy and reliability of the liquid level measuring device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the ultrasonic level gauge of this utility model;

[0020] Figure 2 yes Figure 1 A top view of the electrical connection between the heating module and the wiring terminal. Detailed Implementation

[0021] As can be seen from the background technology, reducing the interference caused by water vapor during ultrasonic level gauge measurement has become an urgent problem to be solved.

[0022] To address the aforementioned problems, this utility model provides an ultrasonic level gauge, comprising: an ultrasonic level gauge body, wherein a probe is disposed at the bottom of the ultrasonic level gauge body; a protective sleeve having a accommodating cavity disposed at the bottom of the ultrasonic level gauge body, the accommodating cavity accommodating the probe, wherein the accommodating cavity has a cavity bottom on the side away from the ultrasonic level gauge body in the extending direction of the accommodating cavity, and there is a gap between the cavity bottom and the probe; and a heating module disposed at the cavity bottom of the protective sleeve for heating the protective sleeve.

[0023] In this disclosed solution, since a heating module is provided at the bottom of the cavity at the bottom of the protective sleeve, the water vapor condensed at the bottom of the protective sleeve can be removed through the heating module, thereby reducing the interference of water vapor on the ultrasonic level gauge and thus reducing the probability of false alarms of the ultrasonic level gauge.

[0024] To make the above-mentioned objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Figure 1 This is a schematic diagram of the structure of an embodiment of the ultrasonic level gauge of this utility model; Figure 2 yes Figure 1 A top view of the electrical connection between the heating module and the wiring terminal.

[0025] It should be noted that, for the sake of clarity, Figure 2 The protective cover and display unit have been omitted.

[0026] refer to Figures 1 to 2 The ultrasonic level gauge includes: an ultrasonic level gauge body 10, wherein a probe 11 is provided at the bottom of the ultrasonic level gauge body 10 (e.g., ...). Figure 2 (as shown); a protective sleeve 13 with a receiving cavity 12 is disposed at the bottom of the ultrasonic level gauge body 10. The receiving cavity 12 accommodates the probe 11. In the extending direction of the receiving cavity 12, the receiving cavity 12 has a cavity bottom 14 on the side away from the ultrasonic level gauge body 10, and there is a gap between the cavity bottom 14 and the probe 11; heating module 15 (as shown); Figure 2 As shown in the figure, it is disposed at the bottom 14 of the cavity of the protective sleeve 13 for heating the protective sleeve 13.

[0027] The ultrasonic level gauge body 10, as the core of the entire device, is responsible for processing the ultrasonic signals received by the probe 11 and determining the liquid level height of the measured liquid by calculating the time difference between the emission and reception of the sound wave.

[0028] It should be noted that the ultrasonic level gauge body 10 is the control and signal processing center of the probe 11. After the ultrasonic level gauge body 10 generates an ultrasonic signal, it is transmitted through the probe 11. At the same time, it receives the reflected signal transmitted back by the probe 11 and processes it to obtain the liquid level information of the liquid being measured.

[0029] The probe 11 is used to transmit ultrasonic signals and receive the reflected signals.

[0030] Specifically, when the ultrasonic level gauge is working, the probe 11 emits ultrasonic pulse signals to the surface of the liquid being measured. When these ultrasonic pulse signals encounter the surface of the liquid being measured, they will be reflected immediately, forming reflected ultrasonic pulse signals. The reflected ultrasonic pulse signals will return to the probe 11 along the original path. By analyzing the time difference between the transmitted and received signals, as well as parameters such as waveform changes, the ultrasonic level gauge body 10 can accurately determine the position of the liquid surface, thereby realizing the measurement of the liquid level height.

[0031] The protective sleeve 13 is used to protect the bottom of the ultrasonic level gauge body 10 and the probe 11 from the influence of the external environment, such as dust, moisture, corrosive gases, etc.

[0032] Specifically, the protective sleeve 13 encloses the probe 11 through the accommodating cavity 12 to prevent external mechanical impacts, collisions, etc., from damaging the probe 11. In addition, the protective sleeve 13 can also have a sealing function to prevent external liquids and other substances from entering the ultrasonic level gauge body 10, ensuring the normal operation of the ultrasonic level gauge. For example, in some situations where liquids are prone to splashing, the protective sleeve 13 can prevent liquids from directly impacting the probe 11, and at the same time, it can also prevent liquids from entering the interior of the ultrasonic level gauge body 10 through the gap between the probe 11 and the ultrasonic level gauge body 10.

[0033] It should be noted that the protective sleeve 13 is located at the bottom of the ultrasonic level gauge body 10, mainly to protect the bottom structure of the ultrasonic level gauge body 10 (including the probe 11). The ultrasonic level gauge body 10 is part of the protected object, and the protective sleeve 13, through the accommodating cavity 12, provides a relatively safe environment for the bottom of the ultrasonic level gauge body 10, preventing external factors from damaging the ultrasonic level gauge body 10, thereby indirectly ensuring that the ultrasonic level gauge body 10 can work normally.

[0034] In this embodiment, the protective sleeve 13 is detachably connected to the bottom of the ultrasonic level gauge body 10, which facilitates the separation and reinstallation of the protective sleeve 13 from the bottom of the ultrasonic level gauge body 10.

[0035] Specifically, the protective sleeve 13 is connected to the bottom of the ultrasonic level gauge body 10 via a flange.

[0036] In other embodiments, the protective sleeve and the bottom of the ultrasonic level gauge body can be connected by a snap fastener, or the protective sleeve and the bottom of the ultrasonic level gauge body can be connected by a thread.

[0037] In other embodiments, depending on actual needs, the protective sleeve and the bottom of the ultrasonic level gauge body can also be non-detachably connected.

[0038] The accommodating cavity 12 is used to accommodate and fix the probe 11, and also to provide a relatively closed environment for the probe 11, protecting the probe 11 from the influence of the external environment.

[0039] The bottom 14 of the cavity provides space for the heating module 15.

[0040] In this embodiment, in the extending direction of the accommodating cavity 12, the accommodating cavity 12 has a cavity bottom 14 on the side away from the ultrasonic level gauge body 10, and there is a gap between the cavity bottom 14 and the probe 11, which helps to reduce the reflection and interference of the ultrasonic signal by the cavity bottom 14, thereby ensuring that the probe 11 receives mainly the reflected signal from the surface of the liquid being measured, and improving the accuracy and reliability of the measurement.

[0041] The heating module 15 is used to heat the bottom 14 of the cavity of the protective sleeve 13.

[0042] It should be noted that since a heating module 15 is provided at the bottom 14 of the cavity of the protective sleeve 13, the water vapor condensed at the bottom of the protective sleeve 13 can be removed by the heating module 15, thereby reducing the interference of water vapor on the ultrasonic level gauge and thus reducing the probability of false alarms of the ultrasonic level gauge.

[0043] In this embodiment, the heating module 15 includes a heating wire or a heating film.

[0044] It should be noted that heating wires typically have high mechanical strength and corrosion resistance, enabling them to work stably for a long time in harsh industrial environments. At the same time, heating wires can quickly convert electrical energy into heat energy, providing efficient heating effects. This allows the heating module 15 to remove the condensed water vapor at the bottom of the protective sleeve 13 in a short time, ensuring the normal operation of the ultrasonic level gauge.

[0045] The heating film typically has a thin structure, which can be easily installed at the bottom 14 of the cavity of the protective sleeve 13 without taking up too much space or affecting the overall design of the ultrasonic level gauge. At the same time, the heating film can provide a uniform heating effect, avoiding the problems of local overheating or uneven heating, thus enabling the heating module 15 to achieve uniform heating of the bottom 14 of the cavity of the protective sleeve 13.

[0046] As an example, the heating module 15 is a heating wire.

[0047] In this embodiment, when the heating module 15 is a heating wire, the heating wire is distributed in a serpentine or wavy pattern at the bottom 14 of the cavity.

[0048] It should be noted that the heating wires are distributed in a serpentine or wavy pattern at the bottom of the cavity 14. On the one hand, this ensures that the heat is distributed more evenly at the bottom of the cavity 14. On the other hand, it also allows the heating wires to cover a larger area, so that the heat can be evenly transferred to the entire bottom of the cavity 14, avoiding the problems of local overheating or uneven heating.

[0049] As an example, when the heating module 15 is a heating wire, the heating wire is distributed in a serpentine pattern at the bottom 14 of the cavity.

[0050] In this embodiment, the bottom 14 of the cavity of the protective sleeve 13 has a groove (not shown), and the heating module 15 is embedded in the groove; the ultrasonic level gauge further includes: thermally conductive adhesive (not shown), located in the groove and wrapping the heating module 15 located in the groove, the thermally conductive adhesive filling all or part of the remaining space of the groove where the heating module 15 is located.

[0051] The remaining space refers to the space remaining in the groove excluding the heating module 15.

[0052] The groove serves to limit and fix the heating module 15.

[0053] The thermally conductive adhesive further secures the heating module 15.

[0054] It should be noted that the heating module 15 is embedded in the groove and filled with thermally conductive adhesive, which helps to ensure that the heating module 15 will not shift or fall off due to vibration or mechanical impact during operation. This reduces the risk of loosening due to long-term use or environmental factors, thereby improving the overall stability and reliability of the ultrasonic level gauge.

[0055] In this embodiment, there is a gap between the heating module 15 and the probe 11 in the extending direction of the accommodating cavity 12.

[0056] It should be noted that since the heating module 15 generates heat when it is working, by setting an interval between the heating module 15 and the probe 11, the thermal interference of the heating module 15 to the probe 11 can be effectively reduced, thereby protecting the normal operation of the probe 11.

[0057] In this embodiment, the ultrasonic level gauge further includes: a connector 16 disposed on the side wall of the ultrasonic level gauge body 10; the connection end of the heating module 15 is electrically connected to the connector 16.

[0058] The connector 16 is used to electrically connect the heating module 15 to an external power source, thereby providing power to the heating module 15 and enabling the heating module 15 to perform its heating function.

[0059] Specifically, the connector 16 is located on the side wall of the ultrasonic level gauge body 10, avoiding complex wiring at the bottom or top of the ultrasonic level gauge, thereby reducing the complexity of wiring the external power supply to the ultrasonic level gauge, and correspondingly reducing installation time and labor intensity.

[0060] In this embodiment, the connection end of the heating module 15 includes a power supply lead or a conductive terminal.

[0061] It should be noted that the power supply leads are usually made of multi-strand copper wire or other high-quality conductive materials, which have good conductivity and low resistance, can reduce voltage drop, and ensure that the heating module 15 receives a stable power supply.

[0062] Conductive terminals are typically made of copper or other highly conductive materials, providing excellent contact performance and low contact resistance, thus ensuring efficient power transmission.

[0063] As an example, the connection terminal of the heating module 15 is a power supply lead.

[0064] In other embodiments, depending on the actual application scenario, the connection end of the heating module can also be other types of conductive connection.

[0065] In this embodiment, the ultrasonic level gauge further includes: a protective cover 17 (such as...). Figure 1 As shown in the figure, it is disposed on the top of the ultrasonic level gauge body 10.

[0066] The protective cover 17 is used to protect the top of the ultrasonic level gauge body 10 from mechanical impact and collision, and also to prevent dust, sand and other impurities from entering the equipment, ensuring that the ultrasonic level gauge can work normally under various environmental conditions.

[0067] Specifically, the protective cover 17 is a transparent protective cover, which allows operators to directly observe the values ​​on the display unit, thereby enabling real-time monitoring of the liquid level and ensuring the accuracy and reliability of the measurement.

[0068] In other embodiments, depending on actual needs, the protective cover may also be an opaque protective cover.

[0069] In this embodiment, the protective cover 17 is detachably connected to the top of the ultrasonic level gauge body 10. On the one hand, this allows operators to easily remove the protective cover 17 to inspect, clean, or replace internal components without complicated tools or operating procedures. On the other hand, it also facilitates the replacement of the protective cover 17 without replacing the entire ultrasonic level gauge, thereby reducing the risk of failure.

[0070] Specifically, the inner wall of the protective cover 17 is provided with an internal thread structure, and the top of the ultrasonic level gauge body 10 is provided with an external thread structure. The internal thread structure and the external thread structure cooperate to form a threaded connection.

[0071] In other embodiments, the inner wall of the protective cover may also be provided with an external thread structure, and the top of the ultrasonic level gauge body may also be provided with an internal thread structure. The internal thread structure and the external thread structure cooperate to form a threaded connection. Alternatively, the protective cover and the top of the ultrasonic level gauge body may also be connected by a snap-fit ​​connection, or the protective cover and the top of the ultrasonic level gauge body may also be connected by a flange connection.

[0072] In other embodiments, depending on actual needs, the protective cover is non-detachably connected to the top of the ultrasonic level gauge body.

[0073] In this embodiment, the ultrasonic level gauge further includes: a display unit 18 (e.g., Figure 1 As shown in the figure, it is located between the protective cover 17 and the ultrasonic level gauge body 10. The protective cover 17 covers the display unit 18, and the display unit 18 is electrically connected to the connector 16.

[0074] Display unit 18 is used to display the liquid level status of the measured liquid.

[0075] It should be noted that the protective cover 17 covers the display unit 18, which can effectively prevent the display unit 18 from being subjected to mechanical impact, collision and wear.

[0076] It should also be noted that the display unit 18 is electrically connected to the wiring head 16, and the connection end of the heating module 15 is electrically connected to the wiring head 16, which helps to reduce the complexity of wiring and potential failure points, and improves the overall reliability of the ultrasonic level gauge.

[0077] Specifically, the display unit 18 is a display screen. The display screen can show liquid level measurement data in real time, allowing operators to intuitively understand the current liquid level status without the need for complex calculations or interpretations. This improves the user-friendliness of the ultrasonic level gauge and reduces operational errors.

[0078] Accordingly, this utility model embodiment also provides a liquid level measuring device.

[0079] refer to Figure 1 and Figure 2 The liquid level measuring device includes the ultrasonic liquid level gauge described in any embodiment of this utility model.

[0080] It should be noted that, since the liquid level measuring device includes the ultrasonic liquid level gauge described in this embodiment of the invention, it is beneficial to improve the detection accuracy and reliability of the liquid level measuring device.

[0081] In this embodiment, the ultrasonic level gauge includes a connector 16 disposed on the side wall of the ultrasonic level gauge body 10; the level measuring device further includes: a power supply cable 20 (e.g., Figure 1 As shown), it is electrically connected to the terminal block 16.

[0082] Power cable 20 is used to transmit power from an external power source to various components of the level measuring device through connector 16, including the ultrasonic level gauge body 10 and the heating module 15 (e.g., Figure 2 (As shown).

[0083] It should be noted that the electrical connection between the power supply cable 20 and the connector 16 enables centralized management of the power supply to the liquid level measuring device, which helps to reduce the complexity of wiring, lowers the risk of failure due to wiring errors or looseness, and improves the overall reliability of the liquid level measuring device.

[0084] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An ultrasonic liquid level meter, characterized by, include: An ultrasonic level gauge body, wherein a probe is provided at the bottom of the ultrasonic level gauge body; A protective sleeve with a accommodating cavity is disposed at the bottom of the ultrasonic level gauge body. The accommodating cavity accommodates the probe. In the extending direction of the accommodating cavity, the accommodating cavity has a cavity bottom on the side away from the ultrasonic level gauge body, and there is a gap between the cavity bottom and the probe. A heating module is located at the bottom of the cavity of the protective sleeve and is used to heat the protective sleeve.

2. The ultrasonic level gauge as described in claim 1, characterized in that, The ultrasonic level gauge also includes: a connector, which is disposed on the side wall of the ultrasonic level gauge body; The connection terminal of the heating module is electrically connected to the terminal block.

3. The ultrasonic level gauge as described in claim 2, characterized in that, The connection end of the heating module includes a power supply lead or a conductive terminal.

4. The ultrasonic level gauge as described in claim 1, characterized in that, The heating module includes a heating wire or a heating film.

5. The ultrasonic level gauge as described in claim 4, characterized in that, When the heating module is an electric heating wire, the electric heating wire is distributed in a serpentine or wavy pattern at the bottom of the cavity.

6. The ultrasonic level gauge as described in claim 1, characterized in that, The bottom of the cavity of the protective sleeve has a groove, and the heating module is embedded in the groove; The ultrasonic level gauge further includes: thermally conductive adhesive, located in the groove and wrapping the heating module located in the groove, the thermally conductive adhesive filling all or part of the remaining space of the groove where the heating module is located.

7. The ultrasonic level gauge as described in claim 1, characterized in that, In the extending direction of the accommodating cavity, there is a gap between the heating module and the probe.

8. The ultrasonic level gauge as described in claim 1, characterized in that, The protective sleeve is detachably connected to the bottom of the ultrasonic level gauge body.

9. A liquid level measuring device, comprising an ultrasonic liquid level gauge as described in any one of claims 1 to 8.

10. The liquid level measuring device as described in claim 9, characterized in that, The ultrasonic level gauge includes a connector disposed on the side wall of the ultrasonic level gauge body. The liquid level measuring device also includes a power supply cable, which is electrically connected to the connector.

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