An ultrasonic liquid level sensor

Abstract

An ultrasonic liquid level sensor, comprising a shell and a circuit control assembly installed in the shell, a support part for supporting the circuit control assembly is arranged on the inner wall of the shell, a limiting assembly is arranged on the support part, the limiting assembly comprises a positioning groove arranged on the circuit control assembly and a limiting part arranged on the inner wall of the shell, and the limiting part is detachably installed by being inserted into the positioning groove. The positioning groove is arranged on the circuit control assembly, the support part and the limiting part matched with the positioning groove are arranged on the inner wall of the shell, the limiting part and the positioning groove are used for detachable installation, the circuit control assembly only needs to be taken out along the axial direction when being disassembled, the adjustment of the circuit control assembly is realized without damaging the shell, the maintenance process is simplified, and the circuit control assembly can be repeatedly installed and used after maintenance.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic measurement, specifically to an ultrasonic liquid level sensor. Background Technology

[0002] Ultrasonic level sensors are widely used for measuring the height of various liquids and solids. Their core circuit board handles signal transmission, reception, and data processing. Its stability within the housing directly determines the sensor's measurement accuracy, anti-interference capability, and lifespan. In practical applications, the circuit board is prone to failure due to long-term vibration and temperature / humidity changes, requiring frequent disassembly and maintenance. However, traditional limiting solutions struggle to balance fixed reliability with ease of maintenance, becoming a key issue restricting sensor maintenance efficiency.

[0003] Current mainstream limiting solutions have significant disassembly defects: Mechanical fastening types use screws to secure the circuit board, requiring special tools for disassembly, and repeated disassembly and reassembly can easily lead to stripped threads and stress damage to the circuit board; Snap-on types rely on elastic snap-fit ​​for fixation, but after long-term use, the snap-fit ​​is prone to aging and deformation, requiring forceful prying during disassembly, which can easily damage the shell and the edges of the circuit board; Encapsulated types use adhesive to cure the limiting mechanism, completely covering the circuit board, requiring damage to the shell and adhesive layer during disassembly, and cannot be reused after repair; Elastic clamping types use a combination of silicone pads and spring sheets for limiting, but the elastic components are easily lost after disassembly, and the positioning accuracy is difficult to guarantee during reassembly. Utility Model Content

[0004] This invention aims to solve the problems existing in the prior art by providing an ultrasonic liquid level sensor that facilitates circuit board repair.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: an ultrasonic liquid level sensor, including a housing and a circuit control component installed in the housing. The inner wall of the housing is provided with a support for supporting the circuit control component. The support is provided with a limiting component. The limiting component includes a positioning groove provided on the circuit control component and a limiting part provided on the inner wall of the housing. The limiting part can be detachably installed by inserting into the positioning groove.

[0006] This application provides a positioning groove on the circuit control component and a support part and a limiting part that matches the positioning groove on the inner wall of the housing. The limiting part and the positioning groove enable detachable installation, so that the circuit control component can be removed axially when disassembling. This allows the circuit control component to be adjusted without damaging the housing, simplifying the maintenance process and enabling the circuit control component to be reinstalled and used after maintenance.

[0007] Preferably, the housing includes a mounting shell and a fixing shell disposed above the mounting shell and protruding radially therefrom, with the circuit control assembly installed inside the mounting shell. The mounting shell, as the main body of the housing, provides a stable supporting foundation for the circuit control assembly. The fixing shell, disposed above the mounting shell and protruding radially therefrom, provides support for the mounting shell, making the housing more stable during installation. Furthermore, the cooperation between the mounting shell and the fixing shell reduces the impact of the external environment on the circuit control assembly.

[0008] Preferably, the support portion includes a first arc-shaped boss arranged circumferentially along the inner wall of the mounting housing and a second arc-shaped boss arranged opposite to the first arc-shaped boss. The limiting portion is a first cylindrical protrusion provided on the second arc-shaped boss. The first and second arc-shaped bosses provide sufficient radial support to ensure stable installation of the circuit control assembly in the mounting housing. In addition, the first cylindrical protrusion on the second arc-shaped boss can prevent relative movement of the circuit control assembly in the axial direction, thereby achieving accurate installation of the circuit control assembly in the mounting housing. Furthermore, it allows the circuit control assembly to be removed only along the axial direction of the mounting housing during disassembly, thus facilitating maintenance of the circuit control assembly.

[0009] Preferably, the support portion is an annular boss arranged circumferentially along the inner wall of the mounting housing, and the limiting portion is a second columnar protrusion disposed above the annular boss. Because the annular boss is arranged circumferentially along the inner wall of the mounting housing, the circuit control component can be fully supported on the support portion, avoiding instability caused by partial support of the circuit control component by the support portion, and preventing tilting of the circuit control component during use. This ensures that the components supported by the annular boss on the circuit board can be stably fixed inside the mounting housing. Simultaneously, the second columnar protrusion disposed above the annular boss, through its height limitation and synergistic effect with the annular boss, reliably limits the circuit control component, effectively preventing axial movement of the circuit control component within the mounting housing, and facilitating the assembly and maintenance of the circuit control component.

[0010] Preferably, a sealing ring is provided above the fixed housing, and a flange is provided above the sealing ring. The sealing ring on the fixed housing creates a good seal between the fixed housing and the flange, reducing the risk of external substances entering the housing and contaminating the circuit board.

[0011] Preferably, the fixed housing, sealing ring, and flange are all provided with screw holes, and a fixing screw is provided at the bottom of the fixed housing. The fixing screw passes through the screw holes on the fixed housing, sealing ring, and flange in sequence. By having the fixing screw pass through the screw holes on the fixed housing, sealing ring, and flange in sequence, a tight connection is achieved between the fixed housing and the sealing ring, as well as between the sealing ring and the flange. This not only prevents the housing from loosening during use, but also further enhances the sealing performance of the housing, effectively preventing the intrusion of external substances from damaging the circuit board, thereby improving the reliability and service life of the ultrasonic level sensor.

[0012] Preferably, the mounting housing has an upwardly extending positioning flange, and both the sealing ring and the flange are fitted onto the outside of the positioning flange for positioning. The positioning flange is used to solve the positioning problem of the sealing ring and flange during installation, and can effectively prevent the occurrence of incorrect installation of the sealing ring and flange.

[0013] Preferably, the flange has a notch for external connection wires to pass through and connect to the circuit control component. This notch allows the connection wires to pass directly through and connect to the circuit control component without requiring complex tools or procedures, simplifying the connection and maintenance process, improving the ease of use of the sensor, and enhancing the stability and reliability of the circuit.

[0014] Preferably, the fixed shell is provided with reinforcing ribs, including annular reinforcing ribs and a plurality of strip-shaped reinforcing ribs arranged radially on the fixed shell. The reinforcing ribs on the fixed shell can effectively prevent shell deformation when subjected to external pressure and can uniformly transmit stress, thereby improving the structural strength and durability of the fixed shell.

[0015] Preferably, the mounting shell and the fixing shell are integrally injection molded. This simplifies the manufacturing process and reduces the weight of the shell.

[0016] The beneficial effects of this utility model are as follows: A support portion is provided on the inner wall of the housing to support the circuit control component inside the housing. Simultaneously, a limiting portion is provided on the inner wall of the housing, and a positioning groove is provided on the circuit control component. This allows the user to directly remove the circuit control component axially from the housing during maintenance without damaging the housing or adhesive layer. The elastic component does not need to be involved in fixing, simplifying the disassembly process and allowing the circuit control component to be reinstalled after maintenance. Furthermore, the circuit control component is installed on the limiting portion via the positioning groove during installation, thereby achieving positioning of the circuit control component during installation and preventing relative axial movement during operation. This improves the reliability and stability of the circuit control component during use, thus ensuring the long-term stable operation of the liquid level sensor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1; Figure 2 This is a top view of Embodiment 1; Figure 3 This is an exploded view of Example 1; Figure 4 This is a cross-sectional view of Example 1; Figure 5 This is a top view of the housing in Embodiment 1; Figure 6 This is a cross-sectional view of Example 2; Figure 7 This is a top view of the casing in Embodiment 2.

[0018] Figure descriptions: 1. Housing; 2. Circuit control assembly; 21. Positioning groove; 3. Support part; 31. First arc-shaped boss; 32. Second arc-shaped boss; 33. Annular boss; 4. Limiting part; 41. First columnar protrusion; 42. Second columnar protrusion; 5. Mounting shell; 51. Positioning flange; 6. Fixing shell; 61. Reinforcing rib; 611. Annular reinforcing rib; 612. Strip reinforcing rib; 7. Sealing ring; 8. Flange; 81. Notch; 9. Fixing screw. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0020] Example 1 Combination Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses an ultrasonic liquid level sensor, including a housing 1 and a circuit control component 2 installed inside the housing 1. The inner wall of the housing 1 is provided with a support part 3 for supporting the circuit control component 2. The support part 3 is provided with a limiting component, which includes a positioning groove provided on the circuit control component and a limiting part provided on the inner wall of the housing. The limiting part can be detachably installed by inserting into the positioning groove.

[0021] This application provides a support part 3 on the inner wall of the housing 1 to support the circuit control component 2 inside the housing 1. At the same time, a limiting part 4 is provided on the inner wall of the housing 1, and a positioning groove 21 is provided on the circuit control component 2. This allows the user to directly remove the circuit control component 2 along the axial direction of the housing 1 during maintenance without damaging the housing 1 or the adhesive layer. The elastic component does not need to participate in the fixation, simplifying the disassembly steps and allowing the circuit control component 2 to be reinstalled after maintenance. On the other hand, the circuit control component 2 is installed on the limiting part 4 through the positioning groove 21 during the installation process, thereby achieving positioning of the circuit control component 2 during installation, preventing relative axial movement of the circuit control component 2 during operation, improving the reliability and stability of the circuit control component 2 during use, and thus ensuring the long-term stable operation of the liquid level sensor.

[0022] In addition, the positioning groove 21 can be set at any position of the circuit control component 2. In this embodiment, in order to facilitate the processing of the circuit control component 2 and the housing 1, the positioning groove 21 is set on the edge of the circuit control component 2.

[0023] Combination Figure 1 and Figure 2 As shown, the housing 1 includes a mounting shell 5 and a fixing shell 6 disposed above the mounting shell 5 and protruding radially therefrom. The circuit control assembly 2 is installed inside the mounting shell 5. The mounting shell 5, as the main body of the housing 1, provides a stable support base for the circuit control assembly 2. The fixing shell 6, disposed above the mounting shell 5 and protruding radially therefrom, provides additional mechanical support for the mounting shell 5, allowing the circuit control assembly 2 inside the mounting shell 5 to be installed more stably. This reduces the contact between the inside of the housing 1 and external substances such as moisture, thereby improving the stability of the circuit control assembly 2 inside the housing 1 and thus increasing the service life of the sensor.

[0024] Combination Figure 4 and Figure 5As shown, the support part 3 includes a first arc-shaped boss 31 arranged circumferentially along the inner wall of the mounting shell 5 and a second arc-shaped boss 32 arranged opposite to the first arc-shaped boss 31. The limiting part 4 is a first columnar protrusion 41 provided on the second arc-shaped boss 32. The first arc-shaped boss 31 and the second arc-shaped boss 32 provide a good support surface for the installation of the circuit control component 2, which can evenly distribute the gravity brought by the circuit control component 2 and ensure that the mounting shell 5 can stably support the circuit control component 2. In addition, the first columnar protrusion 41 is provided on the second arc-shaped boss 32, so that the first columnar protrusion 41 and the positioning groove 21 cooperate with each other. On the one hand, it can ensure the accurate positioning of the circuit control component 2 in the radial direction, prevent the relative movement of the circuit control component 2 in the axial direction, and reduce the error in the installation process; on the other hand, it realizes the convenience of assembly and maintenance of the circuit control component 2. When the circuit control component 2 needs maintenance, the circuit control component 2 can be disassembled simply by taking it out in the axial direction of the mounting shell 5.

[0025] Combination Figure 1 and Figure 3 As shown, a sealing ring 7 is provided above the fixed housing 6, and a flange 8 is provided above the sealing ring 7. The sealing ring 7 above the fixed housing 6 forms a good seal between the fixed housing 6 and the flange 8, which can effectively isolate the sensor from the external environment after installation, prevent external dust, moisture and other contaminants from entering the housing 1, and thus reduce the error or failure of the sensor caused by damage to the circuit board.

[0026] Reference Figure 3 As shown, screw holes are provided on the fixed housing 6, sealing ring 7, and flange 8. A fixing screw 9 is located at the bottom of the fixed housing. The fixing screw 9 passes through the screw holes on the fixed housing 6, sealing ring 7, and flange 8 in sequence. By having the fixing screw 9 pass through the screw holes on the fixed housing 6, sealing ring 7, and flange 8 in sequence, a tight connection is achieved between the fixed housing 6 and the sealing ring 7, as well as between the sealing ring 7 and the flange 8. This prevents the housing 1 from loosening during use and further enhances the sealing performance of the housing 1, effectively preventing damage to the circuit control component 2 caused by external substances, thereby improving the reliability and service life of the sensor.

[0027] Combination Figure 1 , Figure 3 and Figure 4 As shown, the mounting housing 5 has an upwardly extending positioning flange 51, and the sealing ring 7 and flange 8 are both fitted onto the outside of the positioning flange 51 for positioning. The positioning flange 51 extending along the direction of the fixed housing 6 on the mounting housing 5 serves to position the sealing ring and flange installed on the fixed housing 6, reducing installation errors caused by improper operation of the sensor and improving the installation efficiency and user experience of the sensor.

[0028] Combination Figure 1 and Figure 3 As shown, flange 8 has a notch 81, which allows external connection wires to pass through and connect to circuit control component 2. Compared with traditional connection methods, by creating a notch 81 on flange 8, external connection wires can directly pass through the notch 81 and connect to circuit control component 2, making the connection between the external control component and the internal circuit control component 2 simpler and more reliable.

[0029] Reference Figure 3 As shown, the fixed shell 6 is provided with reinforcing ribs 61, including annular reinforcing ribs 611 and several strip reinforcing ribs 612 arranged radially on the fixed shell. The annular reinforcing ribs 611 and strip reinforcing ribs 612 on the fixed shell 6 are staggered, which can effectively prevent the shell 1 from deforming when the fixed shell 6 is subjected to external pressure, and can uniformly transmit stress, thereby improving the structural strength and durability of the fixed shell 6.

[0030] In addition, the mounting housing 5 and the fixing housing 6 are integrally injection molded. This simplifies the manufacturing process and, compared to the metal housings of liquid level sensors on the market, effectively reduces weight and manufacturing costs.

[0031] Example 2 Combination Figure 6 and Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the support part 3 is an annular boss 33 arranged circumferentially along the inner wall of the mounting shell 5, and the limiting part 4 is a second columnar protrusion 42 arranged above the annular boss 33. Because the annular boss 33 is arranged circumferentially along the inner wall of the mounting shell 5, it provides a surrounding support surface for the circuit control component 2, allowing for uniform contact between the circuit control component 2 and the annular boss 33. This avoids instability caused by the partial support of the support part 3 on the circuit control component 2, and prevents the circuit control component 2 from tilting during use, thus ensuring that the components supported by the annular boss 33 can be stably fixed inside the mounting shell 5. Simultaneously, the second columnar protrusion 42 is arranged above the annular boss. Through the height limitation of the second columnar protrusion 42 and the synergistic effect of the annular boss 33, a reliable limiting effect is formed on the circuit board, effectively preventing axial movement of the circuit board within the mounting shell 5. This allows the circuit control component 2 to be removed only along the axial direction of the mounting shell 5 during disassembly, thereby facilitating the maintenance of the circuit control component 2.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An ultrasonic liquid level sensor, comprising a housing (1) and a circuit control assembly (2) installed within the housing (1), characterized in that, The inner wall of the housing (1) is provided with a support part (3) for supporting the circuit control component (2). The support part (3) is provided with a limiting component. The limiting component includes a positioning groove (21) provided on the circuit control component (2) and a limiting part (4) provided on the inner wall of the housing (1). The limiting part (4) can be detached and installed by inserting into the positioning groove (21).

2. The ultrasonic liquid level sensor according to claim 1, characterized in that, The housing (1) includes a mounting housing (5) and a fixing housing (6) disposed above the mounting housing (5) and protruding radially therefrom, wherein the circuit control assembly (2) is installed inside the mounting housing (5).

3. An ultrasonic liquid level sensor according to claim 2, characterized in that, The support part (3) includes a first arc-shaped boss (31) arranged circumferentially along the inner wall of the mounting shell (5) and a second arc-shaped boss (32) arranged opposite to the first arc-shaped boss (31). The limiting part (4) is a first columnar protrusion (41) arranged on the second arc-shaped boss (32).

4. An ultrasonic liquid level sensor according to claim 2, characterized in that, The support part (3) is an annular boss (33) arranged circumferentially along the inner wall of the mounting shell (5), and the limiting part (4) is a second columnar protrusion (42) arranged above the annular boss (33).

5. An ultrasonic liquid level sensor according to claim 2, characterized in that, A sealing ring (7) is provided above the fixed shell (6), and a flange (8) is provided above the sealing ring (7).

6. An ultrasonic liquid level sensor according to claim 5, characterized in that, The fixed shell (6), sealing ring (7) and flange (8) are all provided with screw holes. The bottom of the fixed shell (6) is provided with fixing screws (9). The fixing screws (9) pass through the screw holes on the fixed shell (6), sealing ring (7) and flange (8) in sequence.

7. An ultrasonic liquid level sensor according to claim 5, characterized in that, The mounting housing (5) is provided with an upwardly extending positioning flange (51), and the sealing ring (7) and flange (8) are both fitted on the outside of the positioning flange (51) to achieve positioning.

8. An ultrasonic liquid level sensor according to claim 5, characterized in that, The flange (8) has a notch (81) through which an external connection line passes and connects to the circuit control component (2).

9. An ultrasonic liquid level sensor according to claim 2, characterized in that, The fixed shell (6) is provided with reinforcing ribs (61), which include annular reinforcing ribs (611) provided on the fixed shell (6) and a number of strip reinforcing ribs (612) provided on the fixed shell (6) and distributed radially along the radial direction.

10. An ultrasonic liquid level sensor according to claim 2, characterized in that, The mounting shell (5) and the fixing shell (6) are integrally injection molded.

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