An anti-interference liquid level detection device for an ultrasonic cleaning tank

Abstract

The utility model discloses a kind of anti-interference liquid level detection devices for ultrasonic cleaning tank, including mounting plate, the mounting plate top surface is hinged with stand, the stand side wall is fixedly connected with slide rail, the slide rail side wall is slidably connected with sliding seat, the sliding seat side wall is equipped with connecting rod, the connecting rod bottom end is fixedly connected with float ball, control switch assembly is arranged between the stand and sliding seat, the connecting rod side wall is provided with airflow cleaning assembly. Control switch assembly includes the inductive sheet fixedly connected in the sliding seat side wall, the stand side wall is fixedly connected with two photoelectric switches, the inductive sheet is adapted with photoelectric switch, the utility model realizes the accurate detection of liquid level;Compared with traditional float ball switch, its non-contact photoelectric trigger structure and stable mechanical linkage design greatly improve the vibration resistance.

Description

Technical Field

[0001] This utility model belongs to the field of liquid level detection technology, specifically relating to an anti-interference liquid level detection device for ultrasonic cleaning tanks. Background Technology

[0002] In the industrial production field, ultrasonic cleaning tanks are widely used for surface cleaning of various workpieces such as mechanical parts, electronic components, and medical devices due to their advantages of high cleaning efficiency, good cleaning effect, and minimal damage to workpieces. Their core working principle involves ultrasonic transducers built into the perimeter and bottom of the cleaning tank to generate strong high-frequency vibrations. Using water or a specialized cleaning agent as a medium, this vibrational energy is transferred to the workpiece surface, thereby removing attached oil, debris, dust, and other impurities.

[0003] However, the high-frequency vibration characteristics of ultrasonic cleaning tanks pose a challenge to the accurate detection of liquid levels in the tank. In traditional liquid level detection solutions, ultrasonic distance sensors cannot be used because their detection principle conflicts with the working mechanism of the cleaning tank. The high-frequency ultrasonic waves generated when the cleaning tank is working will cause serious interference to the detection sound waves emitted and received by the sensor, resulting in sensor signal distortion and inability to output accurate liquid level data.

[0004] Another commonly used type of float switch relies on a built-in mechanical switch structure to detect liquid level. However, continuous strong vibrations can accelerate the wear, loosening, or even failure of the internal parts of the mechanical switch, significantly shortening the lifespan of the float switch. This not only increases the maintenance cost of the equipment but also causes cleaning operations to be interrupted due to frequent malfunctions, affecting production efficiency.

[0005] Therefore, an anti-interference liquid level detection device for ultrasonic cleaning tanks is designed to overcome the above-mentioned technical defects. Utility Model Content

[0006] (1) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide an anti-interference liquid level detection device for ultrasonic cleaning tanks. This liquid level detection device aims to solve the technical problems of poor detection accuracy, high mechanical wear rate, and easy failure under existing technologies.

[0008] (2) Technical solution

[0009] To address the aforementioned technical problems, this utility model provides an anti-interference liquid level detection device for ultrasonic cleaning tanks, comprising a mounting plate, a column hinged to the top surface of the mounting plate, a slide rail fixedly connected to the side wall of the column, a sliding seat slidably connected to the side wall of the slide rail, a connecting rod mounted on the side wall of the sliding seat, a float fixedly connected to the bottom end of the connecting rod, a control switch assembly between the column and the sliding seat, and an airflow cleaning assembly on the side wall of the connecting rod.

[0010] Furthermore, the control switch assembly includes a sensing plate fixedly connected to the side wall of the sliding seat, and two photoelectric switches are fixedly connected to the side wall of the column, with the sensing plate being adapted to the photoelectric switches.

[0011] Furthermore, the airflow cleaning assembly includes an annular plate sleeved on the side wall of the connecting rod. The annular plate has a hollow structure and several air outlet holes are opened on the bottom surface of the annular plate. A support plate is fixedly installed on the side wall of the sliding seat. A micro air pump is installed on the side wall of the support plate. An air inlet pipe is fixedly connected to the air outlet end of the micro air pump. The other end of the air inlet pipe communicates with the inner cavity of the annular plate.

[0012] Furthermore, the air outlets on the side closer to the center of the annular plate are vertical, while the air outlets on the side farther from the center of the annular plate are inclined.

[0013] Furthermore, the connecting rod sidewall is provided with an external thread near the float, the annular plate is located at the external thread, and nuts are threaded to the upper and lower sides of the connecting rod sidewall on the annular plate respectively.

[0014] Furthermore, a reinforcing plate is bolted between the mounting plate and the column, forming a triangular structure between the reinforcing plate, the mounting plate, and the column.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention, through the design of a column, slide rail, sliding seat, float, and control switch assembly, avoids the mutual interference of ultrasonic signals by using a detection method combining a float, sensing plate, and photoelectric switch, compared to ultrasonic distance sensors, thus achieving accurate liquid level detection. Compared to traditional float switches, its non-contact photoelectric triggering structure and stable mechanical linkage design significantly improve vibration resistance, extend the service life of the device, and reduce the frequency and cost of equipment maintenance.

[0018] This utility model, through the design of the mounting plate, column, and reinforcing plate, features easy installation and strong adaptability. It can be quickly integrated into various industrial ultrasonic cleaning tank equipment. Through precise liquid level signal feedback, it can realize automatic control of the liquid level in the cleaning tank, ensuring stable and efficient cleaning operations and avoiding reduced cleaning effect or equipment failure due to abnormal liquid level. It has outstanding practicality and economy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0021] Figure 3 This is a partial structural schematic diagram of the present invention;

[0022] Figure 4 This is a cross-sectional view of the annular plate of this utility model.

[0023] The markings in the attached diagram are as follows: 1. Mounting plate; 2. Column; 3. Sliding seat; 4. Connecting rod; 5. Float; 6. Induction plate; 7. Photoelectric switch; 8. Ring plate; 9. Air outlet; 10. Support plate; 11. Miniature air pump; 12. Air inlet pipe; 13. Reinforcing plate; 14. Slide rail; 15. Nut. Detailed Implementation

[0024] Example 1:

[0025] This specific embodiment is an anti-interference liquid level detection device for an ultrasonic cleaning tank, and its structural schematic diagram is shown below. Figures 1-4 As shown, it includes a mounting plate 1, a column 2 hinged to the top surface of the mounting plate 1, a slide rail 14 fixedly connected to the side wall of the column 2, a sliding seat 3 slidably connected to the side wall of the slide rail 14, a connecting rod 4 assembled on the side wall of the sliding seat 3, a float ball 5 fixedly connected to the bottom end of the connecting rod 4, a control switch assembly between the column 2 and the sliding seat 3, and an airflow cleaning assembly on the side wall of the connecting rod 4.

[0026] Throughout the testing process, the device relies on a combination of mechanical linkage and photoelectric sensing to monitor the liquid level. It does not generate or receive ultrasonic signals for testing, and therefore is not affected by high-frequency vibrations and ultrasonic interference generated by the ultrasonic transducer in the cleaning tank. At the same time, the non-contact photoelectric triggering method avoids the wear problem of traditional mechanical switches, ensuring that the device can operate stably for a long time in a high-frequency vibration environment.

[0027] like Figure 1 and Figure 2As shown, the control switch assembly includes a sensing plate 6 fixedly connected to the side wall of the sliding seat 3, and two photoelectric switches 7 fixedly connected to the side wall of the column 2. The sensing plate 6 is adapted to the photoelectric switches 7.

[0028] The float 5 floats directly on the surface of the liquid in the cleaning tank, and can synchronize with the liquid level changes in real time, driving the sliding seat 3 and the sensing plate 6 to rise and fall smoothly. The liquid level detection response is fast and the data feedback is accurate. It is not affected by the high-frequency ultrasonic vibration of the cleaning tank, effectively avoiding the signal disorder problem of traditional ultrasonic sensors. Furthermore, through the mechanical linkage structure of the float 5, the sliding seat 3 and the sensing plate 6, there are no complex electronic components, and the vibration and shock resistance is strong. Compared with the built-in mechanical switch of the traditional float 5 switch, the probability of wear is lower and the service life is significantly extended.

[0029] In addition, the photoelectric switch 7 has high trigger sensitivity. When the sensing element 6 rises and falls with the liquid level to the set position, it can quickly and accurately generate an electrical signal, providing a reliable basis for the liquid level control of the equipment and ensuring that the liquid level of the cleaning tank is always in the optimal working range.

[0030] like Figure 2 As shown, a reinforcing plate 13 is bolted between the mounting plate 1 and the column 2, forming a triangular structure with the mounting plate 1 and the column 2. The angle between the mounting plate 1 and the column 2 can be adjusted according to requirements to meet the needs of various scenarios, increase the range of applications, and the reinforcing plate 13 further enhances stability and ensures detection accuracy.

[0031] Example 2:

[0032] Based on Embodiment 1, this embodiment specifically discloses an airflow cleaning component:

[0033] like Figure 3 and Figure 4 As shown, the airflow cleaning assembly includes an annular plate 8 sleeved on the side wall of the connecting rod 4. The annular plate 8 has a hollow structure and several air outlets 9 are opened on the bottom surface of the annular plate 8. A support plate 10 is fixedly installed on the side wall of the sliding seat 3. A micro air pump 11 is installed on the side wall of the support plate 10. An air inlet pipe 12 is fixedly connected to the air outlet end of the micro air pump 11. The other end of the air inlet pipe 12 is connected to the inner cavity of the annular plate 8.

[0034] In order to prevent the float 5 from adhering to a lot of impurities on the liquid surface, the micro air pump 11 can be started at regular intervals to generate airflow. The airflow enters the inner cavity of the annular plate 8 from the air inlet pipe 12 and blows onto the surface of the float 5 from multiple air outlets 9, blowing off the impurities adhering to the surface of the float 5, thereby ensuring the weight and buoyancy of the float 5 and extending the service life of the float 5.

[0035] like Figure 4As shown, the air outlet 9 on the side closer to the center of the annular plate 8 has a vertical structure, while the air outlet 9 on the side farther from the center of the annular plate 8 has an inclined structure. The inclined structure of the air outlet 9 can expand the airflow impact range, further increasing the cleaning effect.

[0036] like Figure 3 As shown, the connecting rod 4 has an external thread on its side wall near the float 5, and the annular plate 8 is located at the external thread. Nuts 15 are threaded onto the upper and lower sides of the connecting rod 4 on the annular plate 8, respectively. The height of the annular plate 8 can be adjusted as needed to control the blowing intensity of the airflow.

[0037] Working Principle: First, the entire device is installed and fixed in the designated position in the ultrasonic cleaning tank, ensuring that the float 5 can float naturally on the liquid surface of the cleaning tank. When the liquid level in the cleaning tank changes, the liquid surface height rises or falls accordingly, and the float 5 floating on the liquid surface will move up and down synchronously. The movement of the float 5 will drive the sliding seat 3 connected to it to slide smoothly along the preset track, and the sensing plate 6 fixed on the sliding seat 3 will also rise or fall synchronously with the sliding seat 3. When the sensing plate 6 rises or falls to the set detection position of the photoelectric switch 7, it will trigger the sensing mechanism of the photoelectric switch 7, causing the photoelectric switch 7 to generate a corresponding electrical signal. The operator can collect this electrical signal to control the related equipment such as liquid replenishment and drainage in the cleaning tank. When the liquid level is lower than the lower threshold, the sensing plate 6 triggers the photoelectric switch 7 to generate a liquid replenishment signal, and the equipment starts the liquid replenishment device; when the liquid level is higher than the upper threshold, the sensing plate 6 triggers the photoelectric switch 7 to generate a stop liquid replenishment or drainage signal, and the equipment stops liquid replenishment or starts drainage.

[0038] All technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An anti-interference liquid level detection device for an ultrasonic cleaning tank, comprising a mounting plate (1), characterized in that: The mounting plate (1) has a column (2) hinged to its top surface. A slide rail (14) is fixedly connected to the side wall of the column (2). A sliding seat (3) is slidably connected to the side wall of the slide rail (14). A connecting rod (4) is mounted on the side wall of the sliding seat (3). A float (5) is fixedly connected to the bottom end of the connecting rod (4). A control switch assembly is provided between the column (2) and the sliding seat (3). An airflow cleaning assembly is provided on the side wall of the connecting rod (4).

2. The anti-interference liquid level detection device for an ultrasonic cleaning tank according to claim 1, characterized in that: The control switch assembly includes a sensing plate (6) fixedly connected to the side wall of the sliding seat (3), and two photoelectric switches (7) fixedly connected to the side wall of the column (2). The sensing plate (6) is adapted to the photoelectric switches (7).

3. The anti-interference liquid level detection device for an ultrasonic cleaning tank according to claim 1, characterized in that: The airflow cleaning assembly includes an annular plate (8) sleeved on the side wall of the connecting rod (4). The annular plate (8) has a hollow structure and several air outlets (9) are opened on the bottom surface of the annular plate (8). A support plate (10) is fixedly installed on the side wall of the sliding seat (3). A micro air pump (11) is installed on the side wall of the support plate (10). An air inlet pipe (12) is fixedly connected to the air outlet end of the micro air pump (11). The other end of the air inlet pipe (12) is connected to the inner cavity of the annular plate (8).

4. The anti-interference liquid level detection device for an ultrasonic cleaning tank according to claim 3, characterized in that: The air outlet (9) on the side closer to the center of the annular plate (8) is a vertical structure, and the air outlet (9) on the side farther away from the center of the annular plate (8) is an inclined structure.

5. The anti-interference liquid level detection device for an ultrasonic cleaning tank according to claim 4, characterized in that: The connecting rod (4) has an external thread on its side wall near the float (5), and the annular plate (8) is located at the external thread. Nuts (15) are threaded to the upper and lower sides of the connecting rod (4) on the annular plate (8).

6. The anti-interference liquid level detection device for an ultrasonic cleaning tank according to claim 1, characterized in that: A reinforcing plate (13) is bolted between the mounting plate (1) and the column (2), and the reinforcing plate (13) forms a triangular structure with the mounting plate (1) and the column (2).

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