Compressor packing box temperature monitoring device

Abstract

The utility model relates to the technical field of temperature monitoring, in particular to a temperature monitoring device for a packing box of a compressor, which comprises a temperature sensor module, a microcontroller, a wireless communication module, a power management module and an alarm module, and is characterized in that the temperature sensor module is connected with the microcontroller and is used for monitoring the temperature in the packing box; the microcontroller is connected with the wireless communication module and is used for transmitting and receiving wireless data; the power management module is used for supplying power to the temperature sensor module, the wireless communication module and the alarm module; the microcontroller is connected with the alarm module and gives an alarm when the temperature exceeds a set range. By monitoring the temperature in the packing box in real time, the abnormal temperature rise condition can be found in time, so that measures are taken in advance to avoid packing leakage, whether the packing is close to the working limit or not can be judged, and the packing is replaced in time to prevent leakage from being aggravated.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature monitoring, in particular to a compressor stuffing box temperature monitoring device. Background Art

[0002] There is a close relationship between compressor stuffing box temperature and packing leakage. Increased stuffing box temperature may affect the performance of the packing material, exacerbating packing leakage. As temperature rises, the packing material may deform, soften, or creep, resulting in a decrease in sealing performance. Excessively high temperatures may also accelerate packing material aging, reducing its service life. Rising temperatures affect the viscosity of the lubricating oil. Excessively high temperatures may cause the lubricating oil to become thinner, reducing lubrication effectiveness and increasing packing wear. Excessively low temperatures may cause the lubricating oil to become thicker, affecting lubricant flow and the sealing performance of the packing. Rising temperatures may also affect the elastic properties of the spring, reducing the spring preload, and thus affecting the sealing effect of the packing ring on the piston rod. Utility Model Content

[0003] The utility model provides a compressor stuffing box temperature monitoring device, which aims to solve the problem of influence of temperature change on the sealing performance of the compressor stuffing box.

[0004] In order to achieve the purpose of the utility model, the technical solution adopted is: a compressor stuffing box temperature monitoring device, including a temperature sensor module, a microcontroller, a wireless communication module, a power management module and an alarm module, the temperature sensor module is connected to the microcontroller for monitoring the temperature inside the stuffing box; the microcontroller is connected to the wireless communication module for sending and receiving wireless data; the power management module is used to power the temperature sensor module, the wireless communication module and the alarm module; the microcontroller is connected to the alarm module to issue an alarm when the temperature exceeds the set range.

[0005] As an optimized solution of the present invention, the microcontroller is the microcontroller U1, and the microcontroller U1 is STM32L051C6T6.

[0006] As an optimized solution of the present invention, the temperature sensor module includes a temperature sensor U2, a capacitor C21 and a capacitor C22. The 4th pin of the temperature sensor U2 is grounded through the capacitor C21, the 5th pin of the temperature sensor U2 is grounded through the capacitor C22, and the 5th pin of the temperature sensor U2 is connected to the 25th pin of the microcontroller U1.

[0007] As an optimized solution of the present utility model, the wireless communication module includes an NB-IoT terminal chip U3, a capacitor C306, a resistor R302, an NPN transistor Q301, an NPN transistor Q4, a resistor R8 and a capacitor C31. The emitter of the NPN transistor Q301 is connected to the TXD pin of the NB-IoT terminal chip U3, the collector of the NPN transistor Q301 is connected to the 26th pin of the microcontroller U1, the collector of the NPN transistor Q4 is connected to the RXD pin of the NB-IoT terminal chip U3, the emitter of the NPN transistor Q4 is connected to the 27th pin of the microcontroller U1, the base of the NPN transistor Q4 is connected to VDD through the parallel resistor R8 and capacitor C31, and the base of the NPN transistor Q301 is connected to VDD through the parallel resistor R302 and capacitor C306.

[0008] As an optimized solution of the present utility model, the alarm module includes a buzzer, an NPN transistor Q1 and a resistor R4. Pin 28 of the microcontroller U1 is connected to the base of the NPN transistor Q1 through the resistor R4. The emitter of the NPN transistor Q1 is grounded, and the collector of the NPN transistor Q1 is connected to the buzzer.

[0009] As an optimization solution of the present utility model, the power management module includes a step-down DC-DC converter U4, a capacitor C43, a capacitor C48, an inductor L1, a Schottky diode D3, a capacitor C44, a capacitor C45 and a capacitor C42. The first pin of the step-down DC-DC converter U4 is grounded through the capacitor C44 and the capacitor C45 in parallel. The Schottky diode D3 is connected between the second pin of the step-down DC-DC converter U4 and the fourth pin of the step-down DC-DC converter U4. The capacitor C48 and the inductor L1 connected in series are connected between the second pin of the step-down DC-DC converter U4 and the fourth pin of the step-down DC-DC converter U4. The capacitor C43 is connected between the third pin of the step-down DC-DC converter U4 and the fourth pin of the step-down DC-DC converter U4.

[0010] The utility model has the following positive effects: 1) By real-time monitoring of the temperature inside the stuffing box, the utility model can promptly detect abnormal temperature rises, thereby taking measures in advance to prevent the occurrence of stuffing leakage. It can help determine whether the stuffing is close to its working limit and replace the stuffing in time to prevent further leakage;

[0011] 2) This utility model uses NB-IoT wireless communication technology to transmit monitoring data to a remote server in real time, allowing operators to promptly understand the status of the stuffing box, thereby improving the overall reliability and safety of the system. When the temperature exceeds the set range, the alarm module will immediately sound an alarm, reminding the operator to take appropriate measures;

[0012] 3) This utility model uses a low-power NB-IoT communication module, significantly reducing maintenance costs and enabling long standby battery life without frequent battery replacement. An efficient power management system converts 12V power to 5V and 3.3V via a DC-DC converter, providing the required voltages for various components and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0014] Figure 1 This is a principle block diagram of the utility model;

[0015] Figure 2 This is a circuit schematic diagram of the microcontroller of the utility model;

[0016] Figure 3 This is a circuit diagram of the temperature sensor module of the utility model;

[0017] Figure 4 This is a circuit diagram of the wireless communication module of the utility model;

[0018] Figure 5 This is the circuit schematic diagram of the utility model alarm module;

[0019] Figure 6 This is a partial circuit schematic diagram of the power management module of the utility model;

[0020] Among them: 1. Temperature sensor module, 2. Microcontroller, 3. Wireless communication module, 4. Power management module, 5. Alarm module. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of this patent clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of this utility model.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention and its application or use. All other embodiments derived by those skilled in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0024] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions, and numerical values described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other example numerical values of the exemplary embodiments may have different values.

[0025] like Figure 1 As shown, the utility model discloses a compressor stuffing box temperature monitoring device, comprising a temperature sensor module 1, a microcontroller 2, a wireless communication module 3, a power management module 4, and an alarm module 5. The temperature sensor module 1 is connected to the microcontroller 2 to monitor the temperature inside the stuffing box; the microcontroller 2 is connected to the wireless communication module 3 to send and receive wireless data; the power management module 4 is used to power the temperature sensor module 1, the wireless communication module 3, and the alarm module 5; and the microcontroller 2 is connected to the alarm module 5 to issue an alarm when the temperature exceeds a set range. The compressor stuffing box temperature monitoring device is placed in a sealed box and mounted on the inner wall of the compressor stuffing box.

[0026] like Figure 2 As shown, microcontroller 2 is microcontroller U1, which is an STM32L051C6T6. The STM32L051C6T6 runs an STM32L series processor, fully utilizing the processor's full-duplex asynchronous communication capabilities and 16-channel ACD with a transmission rate of 1.14Msps. Its primary tasks are to collect temperature sensor information, transmit and process data, and generate over-threshold alarms. The core processor's peripheral circuits, including power supply circuits, filtering circuits, reset circuits, a 32.768kHz low-speed oscillator, and a 4MHz high-speed oscillator, ensure proper chip operation. The STM32L051C6T6 operates at 3.3V.

[0027] like Figure 3As shown, temperature sensor module 1 includes temperature sensor U2, capacitors C21, and capacitor C22. Pin 4 of temperature sensor U2 is grounded via capacitor C21, while pin 5 of temperature sensor U2 is grounded via capacitor C22. Pin 5 of temperature sensor U2 is connected to pin 25 of microcontroller U1. Temperature signal acquisition is achieved using the MAX6608 temperature sensor. This chip, packaged in a 5-pin SOT23 package, features a compact size and high performance, saving space during hardware circuit design. The power supply voltage is 1.8 to 3.6V, with a supply current of 8μA. Therefore, a MAX6010 voltage reference chip is used in the circuit design to provide a 3V supply voltage. Two 0.1μF filter capacitors are connected between the voltage input and output pins, respectively, to filter out AC components and ensure DC signal stability.

[0028] like Figure 4 As shown, the wireless communication module 3 includes an NB-IoT terminal chip U3, a capacitor C306, a resistor R302, an NPN transistor Q301, an NPN transistor Q4, a resistor R8 and a capacitor C31. The emitter of the NPN transistor Q301 is connected to the TXD pin of the NB-IoT terminal chip U3, the collector of the NPN transistor Q301 is connected to the 26th pin of the microcontroller U1, the collector of the NPN transistor Q4 is connected to the RXD pin of the NB-IoT terminal chip U3, the emitter of the NPN transistor Q4 is connected to the 27th pin of the microcontroller U1, the base of the NPN transistor Q4 is connected to VDD through the parallel resistor R8 and the capacitor C31, and the base of the NPN transistor Q301 is connected to VDD through the parallel resistor R302 and the capacitor C306.

[0029] NB-IOT boasts low power consumption and can operate on battery power for over ten years, significantly reducing ongoing maintenance costs. Furthermore, NB-IOT offers exceptionally wide signal coverage, ensuring signal stability while enabling a massive number of connections. The NB-IoT communication module uses the E33V-DTU, an ultra-low-power NB-IoT data transmission module based on the EC616 NB-IoT terminal chip. It can operate from a 5 to 36V DC power supply, but a 12V DC power supply was selected for this system design. The E33VDTU communication module has 23 pins and a rich set of on-chip peripheral interfaces. It also includes RF circuitry for sending and receiving data on a specified frequency band. The E33VDTU communication module has two serial ports for data transmission, both set to a baud rate of 115200 baud. When using the E33V-DTU communication module, you only need to connect the four pins on the module and connect VCC and GND to a 12V DC voltage. The E33V-DTU communication module has a DTU data transparent transmission function and can actively reconnect when communication anomalies occur or power outages, greatly improving the stability and security of data transmission.

[0030] like Figure 5 As shown, the alarm module 5 includes a buzzer, an NPN transistor Q1, and a resistor R4. Pin 28 of the microcontroller U1 is connected to the base of the NPN transistor Q1 via resistor R4. The emitter of the NPN transistor Q1 is grounded, and the collector of the NPN transistor Q1 is connected to the buzzer. The sound and light alarm module is implemented by driving the buzzer. When the transistor is at a high level, it saturates and conducts, activating the buzzer. The 10kΩ series resistor of the microcontroller is connected in series with the NPN transistor.

[0031] like Figure 6As shown, power management module 4 includes a step-down DC-DC converter U4, capacitors C43 and C48, inductor L1, Schottky diode D3, capacitors C44, C45, and C42. Pin 1 of step-down DC-DC converter U4 is grounded via capacitors C44 and C45 connected in parallel. Schottky diode D3 is connected between pin 2 and pin 4 of step-down DC-DC converter U4. Capacitor C48 and inductor L1, connected in series, are connected between pin 2 and pin 4 of step-down DC-DC converter U4. Capacitor C43 is connected between pin 3 and pin 4 of step-down DC-DC converter U4. Step-down DC-DC converter U4, or the XL1509, is a fixed 150kHz frequency PWM DC voltage converter with a maximum output current of 2A. It has built-in enable and protection functions and requires a small number of external components. The XL1509 converts 12V to 5V. This high-efficiency step-down DC-DC converter features low ripple and excellent line and load regulation. It incorporates a built-in fixed-frequency oscillator and frequency compensation circuitry, simplifying circuit design. The PWM control loop can linearly adjust the duty cycle from 0 to 100%. It also includes a built-in enable function and output overcurrent protection. When the secondary current limit function is enabled, the switching frequency is reduced from 150kHz to 50kHz. A 12V power supply is used to directly power wireless communication module 3. Step-down DC-DC converter U4 converts 12V to 5V to power alarm module 5 and wireless communication module 3. This means that wireless communication module 3 requires both 5V and 12V power supplies, as well as a 5V to 3.3V power conversion circuit. This can be achieved using the commonly used AMS1117 voltage regulator chip.

[0032] During operation, temperature sensor module 1 continuously monitors the temperature inside the stuffing box and transmits the data to microcontroller 2. Microcontroller 2 processes the temperature data and compares it with a preset threshold. If necessary, it triggers an alarm and prepares data transmission. If the temperature exceeds the set range, microcontroller 2 activates alarm module 5 to issue an audible warning. Microcontroller 2 then transmits the temperature data to a remote server via wireless communication for remote monitoring and data analysis. This effectively helps monitor the temperature status of the stuffing box and prevent potential safety hazards.

[0033] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compressor stuffing box temperature monitoring device, characterized by: The invention comprises a temperature sensor module (1), a microcontroller (2), a wireless communication module (3), a power management module (4) and an alarm module (5), wherein the temperature sensor module (1) is connected to the microcontroller (2) and is used to monitor the temperature inside the stuffing box; the microcontroller (2) is connected to the wireless communication module (3) and is used to send and receive wireless data; the power management module (4) is used to supply power to the temperature sensor module (1), the wireless communication module (3) and the alarm module (5); and the microcontroller (2) is connected to the alarm module (5) and issues an alarm when the temperature exceeds a set range.

2. A compressor stuffing box temperature monitoring device according to claim 1, characterized in that: The microcontroller (2) is a microcontroller U1, and the microcontroller U1 is STM32L051C6T6.

3. A compressor stuffing box temperature monitoring device according to claim 2, characterized in that: The temperature sensor module (1) comprises a temperature sensor U2, a capacitor C21 and a capacitor C22, wherein the 4th pin of the temperature sensor U2 is grounded via the capacitor C21, the 5th pin of the temperature sensor U2 is grounded via the capacitor C22, and the 5th pin of the temperature sensor U2 is connected to the 25th pin of the microcontroller U1.

4. A compressor stuffing box temperature monitoring device according to claim 3, characterized in that: The wireless communication module (3) includes an NB-IoT terminal chip U3, a capacitor C306, a resistor R302, an NPN transistor Q301, an NPN transistor Q4, a resistor R8 and a capacitor C31, the emitter of the NPN transistor Q301 is connected to the TXD pin of the NB-IoT terminal chip U3, the collector of the NPN transistor Q301 is connected to the 26th pin of the microcontroller U1, the collector of the NPN transistor Q4 is connected to the RXD pin of the NB-IoT terminal chip U3, the emitter of the NPN transistor Q4 is connected to the 27th pin of the microcontroller U1, the base of the NPN transistor Q4 is connected to VDD through the parallel resistor R8 and the capacitor C31, and the base of the NPN transistor Q301 is connected to VDD through the parallel resistor R302 and the capacitor C306.

5. The compressor stuffing box temperature monitoring device according to claim 3, characterized in that: The alarm module (5) includes a buzzer, an NPN transistor Q1 and a resistor R4. Pin 28 of the microcontroller U1 is connected to the base of the NPN transistor Q1 through the resistor R4. The emitter of the NPN transistor Q1 is grounded, and the collector of the NPN transistor Q1 is connected to the buzzer.

6. A compressor stuffing box temperature monitoring device according to any one of claims 1 to 5, characterized in that: The power management module (4) includes a step-down DC-DC converter U4, a capacitor C43, a capacitor C48, an inductor L1, a Schottky diode D3, a capacitor C44, a capacitor C45 and a capacitor C42. The first pin of the step-down DC-DC converter U4 is grounded through the capacitor C44 and the capacitor C45 connected in parallel. The Schottky diode D3 is connected between the second pin of the step-down DC-DC converter U4 and the fourth pin of the step-down DC-DC converter U4. The capacitor C48 and the inductor L1 connected in series are connected between the second pin of the step-down DC-DC converter U4 and the fourth pin of the step-down DC-DC converter U4. The capacitor C43 is connected between the third pin of the step-down DC-DC converter U4 and the fourth pin of the step-down DC-DC converter U4.

Images