Gas concentration detection sensor

Abstract

The utility model discloses a gas concentration detection sensor, which relates to the technical field of gas detection and comprises a sensor shell, a vent hole is arranged at the top end of the sensor shell, a penetrating liquid adding window is arranged on the side wall of the sensor shell, cotton cloth and a silver needle which are in contact are arranged in the sensor shell, and a pin is arranged at the bottom end of the sensor shell and connected with the silver needle through a lead. The door body is rotationally connected to the sensor shell, and the door body is used for blocking the liquid adding window; the exhaust assembly is arranged on the inner wall of the sensor shell, and the output end of the exhaust assembly faces the liquid adding window; the monitoring assembly is used for monitoring the opening and closing state of the door body; the liquid discharging assembly is used for discharging the reagent in the sensor shell; the exhaust assembly and the monitoring assembly are both in signal connection with the controller. According to the gas concentration detection sensor, the technical problems that reagent adding operation of the gas concentration detection sensor is difficult, and the workload of an operator is large are solved, and the technical effects that the liquid adding operation difficulty is reduced, and the maintenance workload of the operator is reduced are achieved.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a gas concentration detection sensor. Background Technology

[0002] In industrial sectors such as coal mining, continuous monitoring of methane (primarily composed of gas) concentration is crucial for ensuring operational safety. Traditional methane concentration sensors typically employ electrochemical principles. This involves placing electrodes within the sensor and using specific reagents to contact the electrodes, enabling a chemical reaction between gas molecules and active materials on the electrodes. The gas concentration is then reflected by changes in current.

[0003] However, the existing technology has the following significant problems, specifically: during the use of the sensor, as the reagent is gradually consumed, its concentration will change, affecting the efficiency of the electrochemical reaction and the accuracy of the current signal, thus affecting the final gas concentration reading.

[0004] To ensure detection accuracy, operators need to manually replenish reagents periodically. During this process, it's also necessary to remove any existing reagent residues from the sensor to avoid interfering with newly added reagents. Current reagent cleaning methods often involve pouring out residual reagents, which is inconvenient and prone to spillage or leakage, causing environmental pollution. Furthermore, replenishing reagents requires purging gases from inside the sensor to prevent residual gases from affecting reagent purity, further increasing the operator's workload.

[0005] Therefore, how to provide a gas concentration detection sensor that reduces operational difficulty, decreases maintenance workload for operators, and improves work efficiency when replenishing reagents is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a liquid replenishment device for a gas concentration detection sensor, which solves the technical problems of difficult reagent addition and high workload for operators in gas concentration detection sensors.

[0007] To achieve the above objectives, this utility model provides a gas concentration detection sensor, comprising:

[0008] The sensor housing has a vent at the top, a liquid filling window through the side wall, a cotton cloth and a silver needle inside, and a pin at the bottom, which is connected to the silver needle by a wire.

[0009] The door is rotatably connected to the sensor housing, and the door is used to block the liquid filling window;

[0010] An exhaust assembly is disposed on the inner wall of the sensor housing, with the output end of the exhaust assembly facing the liquid filling window;

[0011] A monitoring component is used to monitor the opening and closing status of the door.

[0012] A drainage assembly is used to drain the reagents inside the sensor housing;

[0013] The controller, the exhaust component and the monitoring component are all connected to the controller via signal connection.

[0014] Preferably, the exhaust assembly includes:

[0015] A connecting plate is vertically disposed on the inner wall of the sensor housing and located above the liquid filling window;

[0016] An exhaust fan is vertically positioned at the bottom of the connecting plate, with its exhaust port facing the liquid filling window to expel air from the sensor housing. The exhaust fan establishes a signal connection with the controller.

[0017] Preferably, the connecting plate and the exhaust fan are detachably and fixedly connected.

[0018] Preferably, the monitoring component includes an ultrasonic sensor, which is mounted on the exhaust fan housing, with its working end facing the liquid filling window, and the ultrasonic sensor establishes a signal connection with the controller.

[0019] Preferably, the drainage assembly:

[0020] A support plate is vertically disposed on the inner wall of the sensor housing and located below the liquid filling window;

[0021] A suction pump is provided, with an input pipe and an output pipe connected to its two ends respectively. The input pipe is in contact with the bottom end face inside the sensor housing.

[0022] Preferably, both the input pipe and the output pipe are flexible telescopic hoses.

[0023] Preferably, the vent is equipped with a filter screen.

[0024] Preferably, the door is a spring door.

[0025] Preferably, it also includes a power module for supplying power to the ventilation assembly, the monitoring assembly, the drainage assembly, and the controller.

[0026] Preferably, the power module is a rechargeable battery or an external power interface.

[0027] Compared to the aforementioned background technology, the gas concentration detection sensor provided by this utility model can safely discharge the reagent inside the sensor housing through the drain assembly when replenishing reagents, eliminating the need for operators to pour it out. The ventilation assembly can automatically operate according to the opening and closing status of the door, thereby reducing the difficulty of adding liquid, reducing the maintenance workload of operators, and improving work efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a liquid replenishment device for a gas concentration detection sensor provided in an embodiment of the present invention.

[0030] in:

[0031] 1-Sensor housing, 2-Door body, 3-Exhaust assembly, 4-Drainage assembly;

[0032] 11-Ventilation hole, 12-Liquid filling window, 13-Cotton cloth, 14-Silver needle, 15-Pin;

[0033] 31-Connecting plate, 32-Exhaust fan;

[0034] 41-Support plate, 42-Suction pump. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] See Figure 1This application provides a gas concentration detection sensor, comprising a sensor housing 1, with a vent 11 at the top, a through-hole liquid filling window 12 on the side wall, a cotton cloth 13 and a silver needle 14 inside, and a pin 15 at the bottom, the pin 15 being connected to the silver needle 14 via a wire; a door 2, rotatably connected to the sensor housing 1, used to block the liquid filling window 12; an exhaust assembly 3, located on the inner wall of the sensor housing 1, with its output end facing the liquid filling window 12; a monitoring assembly for monitoring the opening and closing status of the door; a drain assembly 4 for draining the reagent inside the sensor housing 1; and a controller, with both the exhaust assembly 3 and the monitoring assembly connected to the controller via a signal connection.

[0038] In other words, the sensor housing 1 is made of high-strength, corrosion-resistant material to ensure stable operation even in harsh environments such as coal mines. A vent 11 is provided at the top of the housing to ensure that methane gas can smoothly enter the sensor for detection, and a liquid filling window 12 facilitates the addition of reagents to the sensor.

[0039] Inside the housing, cotton cloth 13 and silver needle 14 are in close contact, forming the core area for detecting the reaction. Cotton cloth 13 acts as a reagent carrier, uniformly absorbing and retaining the chemical reagents required for the reaction, while silver needle 14, as a sensitive element for changes in conductivity, accurately transmits the electrical signal changes caused by the chemical reaction. Through wires, silver needle 14 is tightly connected to pins 15 at the bottom of the housing, achieving stable transmission of the detection signal to external circuits or systems.

[0040] The door body 2 is rotatably connected to the sensor housing 1, enabling stable rotation. The door body 2 is equipped with a locking device to ensure that the liquid filling window 12 can be quickly and securely closed after the liquid filling operation is completed.

[0041] The exhaust assembly 3 can quickly expel excess gas from the sensor housing 1. Its output end faces directly toward the liquid filling window 12, effectively shortening the exhaust path and improving exhaust efficiency.

[0042] The monitoring component can monitor the opening and closing status of door 2 in real time. Both the exhaust component 3 and the monitoring component are connected to the controller. Specifically, when the operator needs to add reagents to the sensor, door 2 is opened. At this time, the monitoring component immediately detects that door 2 is open and sends this signal to the controller. Upon receiving the signal, the controller reacts quickly and starts the exhaust component 3. The exhaust component 3, through its efficient ventilation function, expels air from the sensor housing, creating a dry and clean environment for subsequent liquid addition operations. After the liquid addition operation is completed, the operator closes door 2. The monitoring component again detects the change in the status of door 2, that is, door 2 is now closed, and sends this new signal to the controller. Upon receiving the closing signal, the controller immediately stops the operation of the exhaust component 3, thereby avoiding unnecessary energy consumption and noise.

[0043] When it is necessary to replace or dispose of the reaction reagent, the operator only needs to activate the drain button on the drain assembly 4 to safely drain the reagent inside the sensor housing 1.

[0044] In summary, the gas concentration detection sensor provided in this application allows for the safe discharge of reagents from the sensor housing 1 via the drain assembly 4 when replenishing reagents, eliminating the need for operators to pour the reagents. The ventilation assembly 3 can automatically operate based on the opening and closing status of the door, reducing the difficulty of adding reagents, minimizing the maintenance workload of operators, and improving work efficiency.

[0045] Based on the above embodiments, the exhaust assembly 3 includes a connecting plate 31, which is vertically disposed on the inner wall of the sensor housing 1 and located above the liquid filling window; an exhaust fan 32, which is vertically disposed at the bottom end of the connecting plate 31, with the exhaust port of the exhaust fan 32 facing the liquid filling window so that the air in the sensor housing 1 is discharged, and the exhaust fan 32 establishes a signal connection with the controller.

[0046] In other words, the connecting plate 31 is vertically disposed on the inner wall of the sensor housing 1 and located above the liquid filling window 12, and the exhaust fan 32 is vertically disposed at the bottom end of the connecting plate 31, with its exhaust port directly facing the liquid filling window 12. When the exhaust fan 32 is started, it will generate a strong suction force to exhaust the air inside the sensor housing 1 through the liquid filling window 12.

[0047] The exhaust fan 32 establishes a signal connection with the controller. The controller can send a start signal to the exhaust fan 32 as needed (such as when it detects that the door 2 is open) to control it to start working. Similarly, when the door 2 is closed, the controller will also send a stop signal to stop the exhaust fan 32 from working.

[0048] Based on the above embodiments, the connecting plate 31 and the exhaust fan 32 are detachably fixedly connected. That is to say, since the connecting plate 31 and the exhaust fan 32 are detachable, when the inside of the sensor needs to be cleaned (e.g., to remove accumulated dust and dirt), the operator can easily remove the exhaust fan 32 and then reinstall it. If the exhaust fan 32 is damaged or its performance degrades due to long-term use and needs to be replaced, the operator only needs to remove the old exhaust fan and install the new one. Since replacement and maintenance become easy, it helps to reduce the overall maintenance cost of the sensor.

[0049] Specifically, the connection between the connecting plate 31 and the exhaust fan 32 can be a snap-fit ​​connection. Corresponding snap-fit ​​structures are designed on the connecting plate 31 and the exhaust fan 32, and fixing and disassembly can be achieved by simple pressing or rotation.

[0050] Based on the above embodiments, the monitoring component includes an ultrasonic sensor, which is mounted on the housing of the exhaust fan 32. The working end of the ultrasonic sensor faces the liquid filling window 12, and the ultrasonic sensor establishes a signal connection with the controller.

[0051] In other words, the ultrasonic sensor emits high-frequency ultrasonic pulses through built-in piezoelectric ceramics or magnetostrictive materials. The sound waves propagate through the air at a constant speed, and when they encounter an object, they are reflected back to the receiver inside the sensor. Based on the arrival time of the echo signal and the known speed of sound, the sensor can accurately calculate the distance and position information of the target object. When the sensor detects a change in the opening state of door 2, it immediately transmits this information to the controller in the form of an electrical signal.

[0052] When installing the ultrasonic sensor, it is necessary to ensure that there are no obstructions in the path between the sensor and the door 2 to ensure that the ultrasonic pulses can be successfully transmitted and received.

[0053] Based on the above embodiments, the drainage assembly 4 includes a support plate 41, which is vertically disposed on the inner wall of the sensor housing 1 and located below the liquid filling window 12; and a suction pump 42, with an input pipe and an output pipe connected to its two ends respectively, and the input pipe being in contact with the bottom end face of the sensor housing 1.

[0054] In other words, the support plate 41 is vertically disposed on the inner wall of the sensor housing 1 and located below the liquid filling window 12. The support plate 41 should be made of corrosion-resistant and wear-resistant materials. At the same time, its structure should be sturdy and stable to ensure that it will not deform or be damaged due to uneven force during long-term use.

[0055] The suction pump 42 is mounted on the support plate 41, with an input pipe and an output pipe connected to its two ends, respectively. The input pipe is in contact with the bottom end face inside the sensor housing 1 to ensure that liquid at the bottom of the housing can be effectively drawn in.

[0056] Working principle: When drainage is required, the suction pump 42 starts and generates negative pressure, drawing the liquid inside the sensor housing 1 into the pump through the input pipe. Subsequently, the liquid is pumped to the output pipe and finally discharged into an external container.

[0057] Based on the above embodiments, both the input and output pipes are flexible hoses. Due to their excellent flexibility and extensibility, the flexible hoses allow for easier adjustment of the pipe's position and length within the compact space inside the sensor housing, ensuring good contact with the bottom surface of the sensor housing 1 and smooth connection to the suction pump 42. Furthermore, the flexible hoses are typically made of corrosion-resistant and wear-resistant materials, such as rubber, silicone, or special synthetic materials, ensuring long-term stable operation of the pipeline.

[0058] More specifically, the size of the gas concentration detection sensor in this application is customized, and the size of the liquid filling window 12 in this application is 5-12cm*5-12cm. Consequently, the sizes of the suction pump 42 and the exhaust fan 32 in this application are both smaller than the size of the liquid filling window 12, and the suction pump 42 and the exhaust fan 32 are both common miniature models on the market.

[0059] Specifically, the vent 11 is equipped with a filter screen. This filter effectively prevents dust, particulate matter, and other impurities from entering the sensor, thus avoiding impacts on measurement accuracy and sensor lifespan. The filter screen material needs to possess good air permeability, corrosion resistance, and wear resistance to ensure that it will not affect the normal operation of the sensor due to clogging or damage during long-term use. Common filter screen materials include stainless steel mesh and nylon mesh. Although the filter screen can prevent impurities from entering the sensor to a certain extent, some dirt will still accumulate over time. Therefore, regular cleaning and maintenance of the filter screen are necessary to ensure its air permeability and filtration effectiveness.

[0060] Based on the above embodiments, the door body 2 is set as a spring door. The spring door has a built-in spring device. When the door body is opened to a certain angle, the spring will automatically release energy and pull the door body back to the closed state, avoiding the safety hazards caused by people forgetting to close the door. In this application, the door body 2 can also be an ordinary body that is rotatably connected to the sensor housing through a pin shaft to block the liquid filling window 12.

[0061] Based on the above embodiments, a power module is also included to supply power to the exhaust assembly 3, the monitoring assembly, the drainage assembly 4, and the controller. The power module can be a rechargeable battery or an external power interface.

[0062] In other words, the main function of the power module is to provide a stable power supply for the exhaust component 3, the monitoring component, the drainage component 4, and the controller. The power module is designed in two forms: a rechargeable battery or an external power interface. This application prefers a rechargeable battery.

[0063] The advantages of using rechargeable batteries as the power module lie in their portability and independence, enabling the gas concentration detection sensor to operate independently without an external power source. Rechargeable batteries typically have high energy density and long lifespan, supporting extended sensor operation. Furthermore, the inclusion of a charging interface allows users to easily charge the battery, ensuring continuous sensor use.

[0064] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A gas concentration detection sensor, characterized in that, include: The sensor housing (1) has a vent hole (11) at the top, a liquid filling window (12) through the side wall, a cotton cloth (13) and a silver needle (14) inside, and a pin (15) at the bottom. The pin (15) is connected to the silver needle (14) by a wire. The door (2) is rotatably connected to the sensor housing (1), and the door (2) is used to block the liquid filling window (12). An exhaust assembly (3) is disposed on the inner wall of the sensor housing (1), and the output end of the exhaust assembly (3) faces the liquid filling window (12). A monitoring component is used to monitor the opening and closing status of the door. The drain assembly (4) is used to drain the reagent inside the sensor housing (1); The controller, the exhaust component (3) and the monitoring component are all connected to the controller via signal connection.

2. The gas concentration detection sensor according to claim 1, characterized in that, The exhaust assembly (3) includes: The connecting plate (31) is vertically disposed on the inner wall of the sensor housing (1) and located above the liquid filling window; An exhaust fan (32) is vertically disposed at the bottom end of the connecting plate (31), with the exhaust port of the exhaust fan facing the liquid filling window to allow air from the sensor housing (1) to be discharged, and the exhaust fan establishes a signal connection with the controller.

3. The gas concentration detection sensor according to claim 2, characterized in that, The connecting plate (31) and the exhaust fan (32) are detachably and fixedly connected.

4. The gas concentration detection sensor according to claim 2, characterized in that, The monitoring component includes an ultrasonic sensor, which is mounted on the housing of the exhaust fan (32). The working end of the ultrasonic sensor faces the liquid filling window (12), and the ultrasonic sensor establishes a signal connection with the controller.

5. The gas concentration detection sensor according to claim 1, characterized in that, The drainage component (4): A support plate (41) is vertically disposed on the inner wall of the sensor housing (1) and located below the liquid filling window (12); A suction pump (42) is provided, with an input pipe and an output pipe connected to its two ends respectively. The input pipe is in contact with the bottom end face inside the sensor housing (1).

6. The gas concentration detection sensor according to claim 5, characterized in that, Both the input pipe and the output pipe are flexible telescopic hoses.

7. The gas concentration detection sensor according to claim 1, characterized in that, The vent (11) is equipped with a filter screen.

8. The gas concentration detection sensor according to claim 1, characterized in that, The door (2) is configured as a spring door.

9. The gas concentration detection sensor according to claim 1, characterized in that, It also includes a power module for supplying power to the exhaust assembly (3), the monitoring assembly, the drainage assembly (4), and the controller.

10. The gas concentration detection sensor according to claim 9, characterized in that, The power module is a rechargeable battery or an external power interface.

Images