Automatic liquid medicine alarm device of automatic spraying machine

Abstract

The utility model discloses an automatic liquid medicine alarm device of an automatic spraying machine, which comprises a liquid medicine tank, and a contact type liquid level detection unit and an air pressure detection unit are arranged at the top of the liquid medicine tank; the control unit is in signal connection with the contact type liquid level detection unit and the air pressure detection unit; the control unit comprises at least one intermediate relay; a signal processing module; an alarm execution unit; wherein when the contact type liquid level detection unit detects that the liquid level is lower than a preset threshold value, or the air pressure detection unit monitors that the air pressure is abnormal, the intermediate relay triggers the alarm execution unit to start. And production abnormalities such as energy consumption increase and unstable coating quality caused by idle running of equipment are avoided.

Description

An automatic chemical alarm device for an automatic spraying machine Technical Field

[0001] This utility model relates to the technical field of vehicle-mounted glass spraying machine components, specifically an automatic chemical alarm device for an automatic spraying machine. Background Technology

[0002] While current automotive glass AF spraying machines have achieved automated spraying, their chemical tanks still suffer from a critical design flaw—the lack of a chemical level monitoring and alarm device. This deficiency leads to the following problems during production: when the chemical level is insufficient, the equipment cannot issue a timely warning, potentially causing spraying interruptions, increased energy consumption due to equipment idling, and unstable coating quality. Furthermore, it necessitates manual inspection of the chemical level, significantly increasing labor costs and operational risks. Summary of the Invention

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides an automatic alarm device for chemical spraying machine, which can effectively solve the problem mentioned in the background art that the chemical tank of the spraying machine is not equipped with a chemical level monitoring and alarm device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an automatic alarm device for chemical spraying machine, including a chemical tank, with a contact liquid level detection unit and an air pressure detection unit installed on its top.

[0005] The control unit is signal-connected to the contact-type liquid level detection unit and the air pressure detection unit;

[0006] The control unit includes:

[0007] At least one intermediate relay, the coil circuit of which receives the trigger signal from the contact-type liquid level detection unit;

[0008] The signal processing module is used to process the logical relationship between liquid level and air pressure detection data;

[0009] The alarm execution unit is connected to the contact circuit of the intermediate relay;

[0010] When the contact-type liquid level detection unit detects that the liquid level is lower than a preset threshold, or when the air pressure detection unit detects an abnormal air pressure, the intermediate relay triggers the alarm execution unit to start.

[0011] Furthermore, it also includes a conductivity testing unit.

[0012] Furthermore, the conductivity testing unit is a four-electrode conductivity meter, with its electrodes distributed in the middle and bottom of the medicine tank.

[0013] Furthermore, the contact-type liquid level detection unit is a capacitive liquid level sensor, which is installed entirely inside the medicine tank.

[0014] Furthermore, the pressure detection unit is a digital pressure transmitter that monitors the working pressure range of 0.1-0.8 MPa in the medicine tank in real time and forms a complementary judgment logic with the liquid level detection data.

[0015] Furthermore, the intermediate relay is a magnetic latching relay with a contact capacity of AC250V / 5A-15A, and is equipped with a relay status indication module.

[0016] Furthermore, the alarm execution unit is an audible and visual alarm, wherein the sound pressure level of the audible and visual alarm is 80-100dB and the flashing frequency is 0.5-5Hz.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] By adding multiple detection units and alarm devices, production abnormalities such as increased energy consumption and unstable coating quality caused by equipment idling have been eliminated.

[0019] Traditional single liquid level sensors are prone to false alarms due to interference from chemical foam and adhering substances. This invention uses a contact-type liquid level sensor and a pressure sensor to form a complementary monitoring system. When the liquid level sensor generates a false low liquid level signal due to surface tension or foam, the pressure detection unit can verify the actual liquid level, thus reducing the false alarm rate.

[0020] A tiered alarm mechanism can be set; dual thresholds for liquid level height can be set for both pre-alarm and emergency alarms, and different alarm modes (differences in buzzer / light flashing frequency) can be used to buy buffer time for operation and maintenance. Attached Figure Description

[0021] Figure 1 is a three-dimensional structural view of this utility model;

[0022] Figure 2 is a schematic diagram of the structure of this utility model;

[0023] Figure 3 is the control circuit diagram of this utility model.

[0024] Numbering on the map:

[0025] 1-Medicine tank, 2-Contact liquid level detection unit, 3-Air pressure detection unit, 4-Control unit, 5-Intermediate relay, 6-Signal processing module, 7-Alarm execution unit, 8-Conductivity testing unit, 9-Power indicator light. Detailed Implementation

[0026] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0027] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. Embodiments

[0028] As shown in Figures 1-3, this utility model provides an automatic chemical alarm device for an automatic spraying machine, including a chemical tank 1, which is equipped with a contact-type liquid level detection unit 2 and an air pressure detection unit 3 on its top.

[0029] Control unit 4 is connected to contact liquid level detection unit 2 and air pressure detection unit 3 via signal connection;

[0030] Control unit 4 includes:

[0031] At least one intermediate relay 5, whose coil circuit receives the trigger signal from the contact-type liquid level detection unit 2;

[0032] Signal processing module 6 is used to process the logical association between liquid level and air pressure detection data;

[0033] The alarm execution unit 7 is connected to the contact circuit of the intermediate relay 5;

[0034] When the contact liquid level detection unit 2 detects that the liquid level is lower than the preset threshold, or the air pressure detection unit 3 detects an abnormal air pressure, the intermediate relay 5 triggers the alarm execution unit 7 to start.

[0035] The contact-type liquid level detection unit 2 uses a capacitive sensor, which measures the liquid level by utilizing the capacitance change formed when two short-distance conductors are immersed in liquid. The coverage area of ​​the two electrodes of the sensor changes with the liquid level, resulting in a change in capacitance. When the liquid level is lower than a preset threshold, the sensor sends a signal to the control unit 4. Its advantages are non-contact measurement and convenient installation.

[0036] The air pressure detection unit 3 uses a MEMS air pressure sensor to monitor the air pressure inside the tank by detecting pressure changes. The sensor has four deformation resistors or capacitors distributed on the force plane, and uses a bridge circuit to detect minute pressure changes with an accuracy of 0.005 hPa.

[0037] The air pressure detection unit 3 has three signal types: gauge pressure, differential, and absolute. Specifically, this device uses an analog differential sensor to balance accuracy and flexibility. When the air pressure inside the tank is abnormal, the sensor sends a signal to the control unit 4.

[0038] Signal processing stage: The intermediate relay 5 of the control unit 4 receives the trigger signal from the liquid level detection unit. After the coil circuit is energized, the iron core is attracted, which drives the contacts to act (normally closed contacts open and normally open contacts close), realizing weak current control of strong current and increasing the contact capacity.

[0039] When the liquid level is below the threshold, an alarm is triggered directly, regardless of the air pressure.

[0040] When the air pressure is abnormal, check if the liquid level is below the threshold. If the liquid level is normal, trigger the air pressure abnormality alarm separately; if the liquid level is below the threshold, trigger both alarms.

[0041] When intermediate relay 5 is triggered, the normally closed contact opens and the normally open contact closes, the alarm circuit is energized, the execution unit starts, and an audible alarm is emitted through a buzzer or a visual prompt is provided through an indicator light.

[0042] It also includes a conductivity testing unit 8.

[0043] Electrical conductivity refers to the ability of a solution to conduct electric current, and it is related to factors such as the concentration and type of ions in the solution, as well as temperature. If a solution is contaminated, its conductivity may change.

[0044] By monitoring the conductivity of the chemical solution in real time, the stability of its quality can be assessed. For example, if the chemical solution deteriorates during storage or use, its conductivity may change, triggering an alarm and preventing the use of substandard chemicals for spraying.

[0045] In some glass spraying applications, the concentration of the chemical solution needs to be precisely controlled to ensure the spraying effect. The conductivity testing unit 8 can monitor the concentration changes of the chemical solution in real time, providing data support for concentration control.

[0046] Among them, the conductivity testing unit 8 is a four-electrode conductivity meter, with its electrodes distributed in the middle and bottom of the medicine tank 1.

[0047] The four-electrode conductivity meter distributes electrodes in the middle and bottom of the tank, which can comprehensively consider conductivity changes under different liquid levels and solution concentrations, reducing measurement errors caused by uneven solution or liquid level fluctuations.

[0048] The central electrode is used to monitor the conductivity of the overall solution in the medicine tank 1, reflecting the average conductivity of the solution and helping to understand the basic condition of the solution in the entire tank.

[0049] Bottom electrode: Since precipitates or solutions with high concentrations tend to settle at the bottom of the tank, the bottom electrode can detect these changes more sensitively, thus providing more comprehensive information on the solution state.

[0050] Among them, the contact liquid level detection unit 2 is a capacitive liquid level sensor, which is installed inside the medicine tank 1.

[0051] The capacitive level sensor, fully integrated within the medicine tank 1, comprehensively covers the liquid level range within the tank, providing more accurate and complete level information. This avoids measurement errors caused by partial immersion of the sensor in liquid, ensuring the precision of level detection.

[0052] Among them, the air pressure detection unit 3 is a digital pressure transmitter that monitors the working air pressure range of 0.1-0.8MPa in the medicine tank 1 in real time, and forms a complementary judgment logic with the liquid level detection data.

[0053] The digital pressure transmitter can monitor the air pressure in the medicine tank 1 in real time, ensuring that it remains within the safe operating range of 0.1-0.8 MPa. Once the air pressure exceeds this range, the transmitter can immediately issue a warning signal so that operators can take timely measures to prevent equipment failure or production accidents caused by excessively high or low air pressure.

[0054] Among them, the intermediate relay 5 is a magnetic latching relay with a contact capacity of AC250V / 5A-15A, and is equipped with a relay status indication module.

[0055] Magnetic latching relays maintain the closed or open state of their contacts through the holding effect of a magnetic field. Even if the control signal disappears, the contact state will not change, thus ensuring the stability and reliability of the control.

[0056] Equipped with a relay status indicator module, it can intuitively display the current status of the relay, which makes it easier for operators to monitor the operating status of the relay, promptly detect and handle potential faults, and improve the maintainability and safety of the equipment.

[0057] Among them, the alarm execution unit 7 is an audible and visual alarm, wherein the sound pressure level of the audible and visual alarm is 80-100dB and the flashing frequency is 0.5-5Hz.

[0058] Audible and visual alarms can emit both sound and light signals simultaneously, providing a dual warning. The sound signal can penetrate noisy environments to attract people's attention; the light signal can provide a warning in low-light or obstructed conditions.

[0059] The sound pressure level of an audible and visual alarm can usually be adjusted within a certain range to adapt to different noise environments. In noisy environments, the sound pressure level can be appropriately increased to ensure that the sound signal can be heard clearly; in quieter environments, the sound pressure level can be appropriately decreased to avoid causing unnecessary disturbance to people.

[0060] The flash frequency can also be adjusted within a certain range to adapt to different lighting conditions and viewing environments. In dimly lit or obstructed environments, the flash frequency can be increased to enhance the warning effect of the light signal; in well-lit or well-viewed environments, the flash frequency can be decreased to avoid visual interference.

[0061] In this embodiment, the medicine tank 1 is equipped with a capacitive level sensor and a MEMS pressure sensor on its top for real-time monitoring of the liquid level and pressure, respectively. A four-electrode conductivity meter is installed in the middle and bottom to monitor the conductivity of the medicine. The middle electrode monitors the overall conductivity of the solution, reflecting its average conductivity; the bottom electrode is more sensitive to detecting precipitates or concentration changes, providing comprehensive information on the solution's state.

[0062] Control unit 4 receives signals from the liquid level sensor, air pressure sensor, and conductivity meter. When the liquid level falls below a preset threshold, the capacitive sensor sends a signal to control unit 4, directly triggering an alarm.

[0063] When the air pressure is abnormal (exceeding the range of 0.1-0.8 MPa), the MEMS sensor sends a signal to the control unit 4. The control unit 4 checks the liquid level status through the signal processing module 6: if the liquid level is normal, it triggers an alarm for abnormal air pressure alone; if the liquid level is below the threshold, it triggers both alarms simultaneously, so that the operator can handle both liquid level and air pressure issues at the same time.

[0064] The conductivity meter monitors the quality of the medicine in real time. Once an abnormal conductivity is detected (which may indicate that the medicine is contaminated or its concentration has changed), it immediately sends a signal to the control unit 4 to trigger an abnormal conductivity alarm.

[0065] Intermediate relay 5 is a magnetic latching type with a contact capacity of AC250V / 5A-15A. Alarm execution unit 7 is an audible and visual alarm with a sound pressure level of 80-100dB and a flashing frequency of 0.5-5Hz. Once the alarm is triggered, the audible and visual alarm will simultaneously emit an audible alarm and flash a warning light.

[0066] The intermediate relay 5 is equipped with a status indicator module, which intuitively displays the current status of the relay.

[0067] The control box is equipped with two intermediate relays with DC24V coils 5, ten terminal blocks, a signal processing module 6, and a DC24V power indicator light 9.

[0068] In the description of this utility model, it should be understood that the terms "middle", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0069] In this invention, unless otherwise expressly specified and limited, the first feature "on" the second feature may be in direct contact with the first feature, or indirect contact with the first feature through an intermediate medium. "A plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.

Claims

1. An automatic chemical alarm device for an automatic spraying machine, characterized in that, The device includes a medicine tank with a contact-type liquid level detection unit and a pressure detection unit on its top; a control unit connected to the contact-type liquid level detection unit and the pressure detection unit; the control unit includes: at least one intermediate relay whose coil circuit receives the trigger signal from the contact-type liquid level detection unit; a signal processing module for processing the logical association between the liquid level and pressure detection data; and an alarm execution unit connected to the contact circuit of the intermediate relay; wherein, when the contact-type liquid level detection unit detects that the liquid level is lower than a preset threshold, or the pressure detection unit detects an abnormal pressure, the intermediate relay triggers the alarm execution unit to start.

2. The automatic chemical alarm device for an automatic spraying machine according to claim 1, characterized in that: It also includes a conductivity testing unit.

3. The automatic chemical alarm device for an automatic spraying machine according to claim 2, characterized in that: The conductivity testing unit is a four-electrode conductivity meter, with its electrodes distributed in the middle and bottom of the medicine tank.

4. The automatic chemical alarm device for an automatic spraying machine according to claim 3, characterized in that: The contact-type liquid level detection unit is a capacitive liquid level sensor, which is installed entirely inside the medicine tank.

5. The automatic chemical alarm device for an automatic spraying machine according to claim 3, characterized in that: The pressure detection unit is a digital pressure transmitter that monitors the working pressure range of 0.1-0.8 MPa in the medicine tank in real time and forms a complementary judgment logic with the liquid level detection data.

6. The automatic chemical alarm device for an automatic spraying machine according to claim 3, characterized in that: The intermediate relay is a magnetic latching relay with a contact capacity of AC250V / 5A-15A and is equipped with a relay status indication module.

7. The automatic chemical alarm device for an automatic spraying machine according to claim 3, characterized in that: The alarm execution unit is an audible and visual alarm, wherein the sound pressure level of the audible and visual alarm is 80-100dB and the flashing frequency is 0.5-5Hz.

Images