Liquid supplement device for gas concentration detection sensor

Abstract

The application discloses a kind of liquid supplementing devices of gas concentration detection sensor, it is related to gas detection technical field, including sensor shell, top is equipped with air hole, inside is equipped with contact cotton cloth and silver needle, bottom is equipped with pin, pin is connected with silver needle;Reagent adding port is equipped on liquid supplementing bottle, bottom is equipped with infusion tube, infusion tube is equipped with liquid pump, the output end of infusion tube passes through the lateral wall of sensor shell to be located above cotton cloth;Low liquid level monitoring component is located in liquid supplementing bottle, for when the liquid level of liquid supplementing bottle is located at preset threshold, low liquid level alarm signal is sent;Liquid pump and low liquid level monitoring component are connected with controller and establish signal connection.The above-mentioned liquid supplementing device of gas concentration detection sensor solves the technical problem that operator needs to manually supplement reagent periodically and the monitoring blank period caused by reagent depletion, realizes the technical effect of reducing the workload of manual maintenance and avoiding the detection interruption caused by reagent depletion.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to a liquid replenishment device for 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, existing technologies have the following significant problems:

[0004] 1. Reagent Consumption and Replenishment Issues: During sensor use, the concentration of reagents changes as they are gradually consumed, directly affecting the efficiency of the electrochemical reaction and the accuracy of the current signal, thus impacting the final gas concentration reading. To ensure detection accuracy, operators need to manually replenish reagents periodically, which not only increases workload but also affects the continuity and efficiency of monitoring.

[0005] 2. Lack of reagent capacity monitoring: Existing sensor designs often cannot monitor or indicate the remaining capacity of internal reagents in real time, making it difficult for operators to accurately determine when reagents need to be replenished. This may lead to monitoring gaps due to reagent depletion, posing a potential threat to safe production.

[0006] Therefore, how to provide a liquid replenishment device for a gas concentration detection sensor to improve the accuracy and reliability of the gas concentration detection sensor, while reducing maintenance costs and operational complexity, is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a liquid replenishment device for a gas concentration detection sensor, which solves the technical problems of operators needing to manually replenish reagents periodically and the monitoring gap caused by reagent depletion.

[0008] To achieve the above objectives, the present invention provides a liquid replenishment device for a gas concentration detection sensor, comprising:

[0009] The sensor housing has a vent at the top, a cotton cloth and a silver needle inside, and a pin at the bottom, which is connected to the silver needle by a wire.

[0010] A rehydration bottle is located outside the sensor housing. The rehydration bottle has a reagent filling port and an infusion tube at the bottom. The infusion tube is equipped with a pump, and the output end of the infusion tube passes through the side wall of the sensor housing so that it is located above the cotton cloth.

[0011] A low liquid level monitoring component is installed inside the replenishment bottle and is used to issue a low liquid level alarm signal when the liquid level in the replenishment bottle is at a preset threshold.

[0012] The controller, the liquid pump and the low liquid level monitoring component are all connected to the controller via signal connection.

[0013] Preferably, the low liquid level monitoring component includes:

[0014] A guide sleeve is provided through the center of the top of the replenishment bottle. A vertically movable connecting rod is provided inside the guide sleeve. A float is fixed at the tail end of the connecting rod. A support rod parallel to the connecting rod is provided on the upper surface of the replenishment bottle.

[0015] A metal sheet is fixed on the connecting rod, and the metal sheet is connected to the negative terminal of the power supply.

[0016] A low-liquid-level power contact is fixed on the support rod, and the low-liquid-level power contact is connected to the positive terminal of the power supply.

[0017] When the float is at a preset threshold liquid level, the metal plate is connected to the low liquid level power contact to form a power circuit and send the lowest liquid level alarm signal to the controller.

[0018] Preferably, the low liquid level monitoring component further includes an audible and visual alarm, which is connected in series between the positive terminal of the power supply and the low liquid level power contact. The specification suggests that the alarm device can be set at a remote end, i.e., at the server end, and both the alarm device and the sensing device at the near end are connected to a local area network to transmit information through the network.

[0019] Preferably, the infusion tube located between the replenishment bottle and the liquid pump is equipped with a hydrostatic level sensor, and the hydrostatic level sensor establishes a signal connection with the controller.

[0020] Preferably, the liquid pump is an electromagnetically driven liquid pump, and the controller controls the start and stop of the electromagnetically driven liquid pump.

[0021] Preferably, the support rod is provided with a capacity scale line.

[0022] Preferably, the vent holes of the sensor housing are equipped with a filter screen.

[0023] Preferably, the opening of the reagent dispensing port is funnel-shaped.

[0024] Preferably, the sensor housing and the replenishment bottle are detachably and fixedly connected.

[0025] Preferably, the fluid replenishment bottle has a transparent observation window on its exterior.

[0026] Compared to the aforementioned background technology, the liquid pump and controller provided by this invention establish a signal connection. The output end of the infusion tube passes through the side wall of the sensor housing so that it is located above the cotton cloth. The replenishment bottle is used to store reagents. The controller can turn on the liquid pump at regular intervals, and then deliver the reagents to the cotton cloth inside the sensor housing through the infusion tube, ensuring that the cotton cloth is always kept moist to maintain the normal progress of the electrochemical reaction. This significantly reduces the workload of manual maintenance. Since the replenishment bottle is equipped with a low liquid level monitoring component, it is used to monitor the liquid level of the reagent in the replenishment bottle and issue a low liquid level alarm signal when the liquid level is at a preset threshold to remind the operator to replenish the liquid. The low liquid level monitoring component ensures that the reagent in the replenishment bottle is always sufficient to avoid monitoring gaps due to reagent depletion, which could pose a hidden danger to safe production. This ensures the accuracy and reliability of gas concentration detection. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] 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.

[0029] in:

[0030] 1-Sensor housing, 2-Replenishment bottle, 3-Liquid pump, 4-Low liquid level monitoring component;

[0031] 11-Ventilation hole, 12-Cotton cloth, 13-Silver needle, 14-Pin, 15-Wire;

[0032] 21-Reagent filling port, 22-Infusion tubing;

[0033] 41-Guide sleeve, 42-Connecting rod, 43-Float ball, 44-Support rod, 45-Metal sheet, 46-Low liquid level power contact, 47-Audible and visual alarm. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] 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.

[0036] See Figure 1 This application provides a liquid replenishment device for a gas concentration detection sensor, comprising: a sensor housing 1, with a vent hole 11 at the top, a cotton cloth 12 and a silver needle 13 inside, and a pin 14 at the bottom, the pin 14 being connected to the silver needle 13 via a wire 15; a replenishment bottle 2, located outside the sensor housing 1, with a reagent filling port 21 on the replenishment bottle 2, an infusion tube 22 at the bottom, a liquid pump 3 on the infusion tube 22, the output end of the infusion tube 22 passing through the side wall of the sensor housing 1 so as to be located above the cotton cloth 12; a low liquid level monitoring component 4, located inside the replenishment bottle 2, used to issue a low liquid level alarm signal when the liquid level in the replenishment bottle 2 is at a preset threshold; and a controller, with the liquid pump 3 and the low liquid level monitoring component 4 both connected to the controller via signal connections.

[0037] Specifically, the sensor housing 1 is made of high-strength, corrosion-resistant material to ensure stable operation 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.

[0038] Inside the housing, cotton cloth 12 and silver needle 13 are in close contact, forming the core area for detecting the reaction. Cotton cloth 12 acts as a reagent carrier, uniformly absorbing and retaining the chemical reagents required for the reaction, while silver needle 13, as a sensitive element for changes in conductivity, accurately transmits the electrical signal changes caused by the chemical reaction. Through wire 15, silver needle 13 is tightly connected to pin 14 at the bottom of the housing, achieving stable transmission of the detection signal to external circuits or systems.

[0039] The refill bottle 2 is located on the outside of the sensor housing 1, which is both convenient to operate and saves space. The reagent filling port 21 on the top of the bottle is sealed with a cap to ensure good sealing and prevent the reagent from evaporating or leaking during storage.

[0040] The infusion tubing 22 connected to the bottom of the rehydration bottle is made of high-quality, corrosion-resistant material to ensure the purity and stability of the reagent during delivery. A precision liquid pump 3 is installed on the infusion tubing. The start, stop, and flow rate of the liquid pump 3 are precisely controlled by a controller. The controller has a preset reasonable rehydration time period. By starting the liquid pump 3 at timed intervals, the automated and intelligent management of reagent rehydration is achieved. The output end of the infusion tubing passes through the side wall of the sensor housing and is directly aligned with the top of the cotton cloth 12, ensuring that the reagent can be accurately dripped onto the cotton cloth 12, achieving effective reagent rehydration and ensuring that the cotton cloth 12 is always kept moist to maintain the normal progress of the electrochemical reaction.

[0041] The low-level monitoring component 4 is used to monitor the liquid level changes in the replenishment bottle in real time, accurately determining whether the liquid level has reached a preset threshold. Once a low-level condition is detected, the monitoring component will immediately issue a low-level alarm signal. The alarm signal is transmitted wirelessly to the controller, which then activates the corresponding alarm program to remind the operator to replenish the liquid in a timely manner, avoiding detection interruptions due to reagent depletion.

[0042] In summary, the liquid replenishment device for a gas concentration detection sensor provided in this application ensures that the cotton cloth 12 is always kept moist to maintain the normal progress of the electrochemical reaction and avoid detection interruption due to reagent depletion. This ensures the accuracy and reliability of gas concentration detection and also significantly reduces the workload of manual maintenance.

[0043] Based on the above embodiments, the low liquid level monitoring component 4 includes: a guide sleeve 41, which is disposed through the top center of the replenishment bottle 2, and a vertically movable connecting rod 42 is provided inside the guide sleeve 41. A float 43 is fixed at the tail end of the connecting rod 42, and a support rod 44 parallel to the connecting rod 42 is provided on the upper end surface of the replenishment bottle 2; a metal sheet 45, which is fixed on the connecting rod 42 and is connected to the negative terminal of the power supply; and a low liquid level power contact 46, which is fixed on the support rod 44 and is connected to the positive terminal of the power supply. When the float 43 is at a preset threshold liquid level, the metal sheet 45 is connected to the low liquid level power contact 46 to form a power circuit and send the lowest liquid level alarm signal to the controller.

[0044] In other words, the guide sleeve 41 is installed at the top center of the replenishment bottle 2, providing a stable path for the movement of the connecting rod 42. The material of the guide sleeve 41 should have certain wear resistance and corrosion resistance to cope with the environment of long-term immersion in reagents.

[0045] The connecting rod 42 is vertically movable within the guide sleeve 41, and a float 43 is fixedly connected to its tail end. The float 43 should be made of lightweight material and have a certain buoyancy, so that it can float up and down with the rise and fall of the reagent liquid level in the replenishment bottle 2. When the liquid level changes, the float 43 drives the connecting rod 42 to make a corresponding vertical movement within the guide sleeve 41.

[0046] Metal plate 45 is fixed at an appropriate position on connecting rod 42 and moves with it. Metal plate 45 is connected to the negative terminal of the power supply. Low liquid level power contact 46 is fixed on support rod 44 and connected to the positive terminal of the power supply. When the liquid level in replenishment bottle 2 drops to a preset threshold, float 43 drives connecting rod 42 to descend, causing metal plate 45 to contact low liquid level power contact 46. At this time, the power circuit is connected, current flows, thereby triggering an alarm signal and sending it to the controller.

[0047] The working principle of the low liquid level monitoring component 4 in this application is as follows: When the reagent level in the replenishment bottle 2 is normal, the float 43 is in a high position, and the metal plate 45 remains separated from the low liquid level power contact 46, so the circuit is not open. When the liquid level drops to a preset threshold, the float 43 sinks, causing the connecting rod 42 and the metal plate 45 to descend until the metal plate 45 contacts the low liquid level power contact 46, forming a closed circuit. At this time, the controller receives an alarm signal, reminding the user to replenish the reagent in time.

[0048] Based on the above embodiments, the low liquid level monitoring component 4 also includes an audible and visual alarm 47, which is connected in series between the positive terminal of the power supply and the low liquid level power contact 46.

[0049] In other words, the audible and visual alarm 47 is connected in series between the positive terminal of the power supply and the low-level power contact 46. Therefore, when the liquid level in the replenishment bottle 2 drops to a preset threshold, causing the metal plate 45 to contact the low-level power contact 46 and form a closed circuit, the audible and visual alarm 47 will be immediately activated. The alarm emits a clear sound and light signal to attract the operator's attention and ensure they can replenish the reagent in a timely manner.

[0050] This application also provides another alarm method: the controller can send alarm information to a remote monitoring center via a communication module (such as a wireless network or wired network). The remote monitoring center is a platform for centralized management and monitoring of gas concentration detection sensors, capable of receiving real-time status information and alarm signals from various sensor devices. Once an alarm message is received from the replenishment device, the monitoring center staff can immediately understand the low liquid level situation and take appropriate measures based on the actual situation, such as notifying on-site operators to immediately replenish reagents.

[0051] Based on the above embodiments, the infusion pipe 22 located between the replenishment bottle 2 and the liquid pump 3 is equipped with a hydrostatic liquid level sensor, and the hydrostatic liquid level sensor establishes a signal connection with the controller.

[0052] In other words, the working principle of a hydrostatic level sensor is based on the static pressure exerted by the liquid on the sensor probe to measure the liquid level. When the liquid level in the infusion tube 22 changes, the static pressure on the sensor probe also changes accordingly. This change is captured by the sensor and converted into an electrical signal, which is then wirelessly transmitted to the controller. The controller processes and analyzes the received signal. Through a preset algorithm, the controller can accurately calculate the liquid level in the infusion tube 22. If the liquid level continues to drop below a preset alarm threshold, the controller can also send an alarm message to the remote monitoring center to remind the operator to replenish the reagent in time.

[0053] Specifically, the liquid pump 3 is an electromagnetically driven liquid pump. The controller controls the start and stop of the electromagnetically driven liquid pump. In other words, the electromagnetically driven liquid pump drives the flow of liquid through electromagnetic force, without the need for traditional mechanical transmission components. It has the advantages of simple structure, small size, light weight, and fast response speed. The controller can control the start and stop of the electromagnetically driven liquid pump according to the preset control logic.

[0054] Based on the above embodiment, the support rod 44 is provided with a capacity scale line, so that the liquid capacity in the replenishment bottle 2 can be known through the capacity scale line.

[0055] In other words, to more intuitively understand the liquid volume in the replenishment bottle 2, the support rod 44 is equipped with a capacity scale. The capacity scale is marked on the support rod 44 at equal intervals, corresponding to the liquid level in the replenishment bottle 2.

[0056] When the liquid volume in the refill bottle changes, the float 43 will float up and down accordingly, causing the connecting rod 42 and the metal plate 45 to move within the guide sleeve 41. Since the support rod 44 and the connecting rod 42 remain parallel and their positions are relatively fixed, the liquid volume in the refill bottle can be determined by observing the relative position of the metal plate 45 and the capacity scale line.

[0057] Specifically, the vent 11 of the sensor housing 1 is equipped with a filter. 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 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 materials include stainless steel mesh and nylon mesh. Although the filter 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 are necessary to ensure its air permeability and filtration effectiveness.

[0058] Specifically, the reagent filling port 21 has a funnel-shaped opening and a sealing cap. The funnel-shaped opening can guide the reagent to flow into the replenishment bottle in a more stable and concentrated manner, reducing the possibility of reagent splashing or leakage, and improving the accuracy and safety of the filling. The sealing cap can effectively isolate dust, bacteria and other contaminants in the external environment from entering the replenishment bottle, protecting the purity and stability of the reagent.

[0059] Specifically, the sensor housing 1 and the replenishment bottle 2 are detachably and fixedly connected, or they can be installed independently. This detachable connection allows the sensor housing 1 and the replenishment bottle 2 to be easily separated and reassembled when needed. This is achieved through specific connection mechanisms (such as snap-fit ​​and quick-release locking mechanisms), ensuring the stability and sealing of the connection. When the sensor or replenishment bottle needs cleaning, replacement, or repair, it can be easily disassembled and reinstalled, reducing maintenance costs and time.

[0060] Specifically, the rehydration bottle 2 has a transparent observation window on the outside. This means that in addition to observing the liquid level, the transparent observation window can also help users monitor other conditions inside the bottle, such as the presence of sediment, color changes, or the formation of bubbles. These changes may indicate that the reagent has deteriorated, become contaminated, or that other abnormalities exist. The material of the transparent observation window needs to possess characteristics such as good transparency, corrosion resistance, wear resistance, and high-temperature resistance. Common materials include high-transparency plastics (such as polycarbonate PC, polymethyl methacrylate PMMA, etc.), which ensure the clarity and durability of the observation window while meeting the needs of different application scenarios.

[0061] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A liquid replenishment device for a gas concentration detection sensor, characterized in that, include: The sensor housing (1) has a vent hole (11) at the top, a cotton cloth (12) and a silver needle (13) inside, and a pin (14) at the bottom. The pin (14) and the silver needle (13) are connected by a wire (15). A replenishment bottle (2) is located outside the sensor housing (1). The replenishment bottle (2) is provided with a reagent filling port (21) and an infusion tube (22) at the bottom. A liquid pump (3) is provided on the infusion tube (22). The output end of the infusion tube (22) passes through the side wall of the sensor housing (1) so that it is located above the cotton cloth (12). A low liquid level monitoring component (4) is installed inside the replenishment bottle (2) and is used to issue a low liquid level alarm signal when the liquid level of the replenishment bottle (2) is at a preset threshold. The controller, the liquid pump (3) and the low liquid level monitoring component (4) are both connected to the controller.

2. The liquid replenishment device for the gas concentration detection sensor according to claim 1, characterized in that, The low liquid level monitoring component (4) includes: A guide sleeve (41) is provided through the top center of the replenishment bottle (2). A vertically movable connecting rod (42) is provided inside the guide sleeve (41). A float (43) is fixed at the tail end of the connecting rod (42). A support rod (44) parallel to the connecting rod (42) is provided on the upper surface of the replenishment bottle (2). A metal sheet (45) is fixed on the connecting rod (42), and the metal sheet (45) is connected to the negative terminal of the power supply. A low liquid level power contact (46) is fixed on the support rod (44), and the low liquid level power contact (46) is connected to the positive terminal of the power supply. When the float (43) is at a preset threshold liquid level, the metal plate (45) is connected to the low liquid level power contact (46) to form a power circuit to send the lowest liquid level alarm signal to the controller.

3. The liquid replenishment device for the gas concentration detection sensor according to claim 2, characterized in that, The low liquid level monitoring component (4) also includes an audible and visual alarm (47), which is connected in series between the positive terminal of the power supply and the low liquid level power contact (46). The instruction manual states that the alarm device can be set at a remote end, i.e., at the server end, and both the sensor device at the near end are connected to the local area network to transmit information through the network.

4. The liquid replenishment device for the gas concentration detection sensor according to claim 2, characterized in that, The infusion tube (22) located between the replenishment bottle (2) and the liquid pump (3) is equipped with a hydrostatic liquid level sensor, and the hydrostatic liquid level sensor establishes a signal connection with the controller.

5. The liquid replenishment device for the gas concentration detection sensor according to claim 1, characterized in that, The liquid pump (3) is an electromagnetically driven liquid pump, and the controller controls the start and stop of the electromagnetically driven liquid pump.

6. The liquid replenishment device for the gas concentration detection sensor according to claim 2, characterized in that, The support rod (44) is provided with a capacity scale line.

7. The liquid replenishment device for the gas concentration detection sensor according to claim 6, characterized in that, The sensor housing (1) has a filter screen installed in its ventilation holes.

8. The liquid replenishment device for the gas concentration detection sensor according to claim 7, characterized in that, The opening of the reagent dispensing port (21) is funnel-shaped.

9. The liquid replenishment device for the gas concentration detection sensor according to claim 8, characterized in that, The sensor housing (1) and the replenishment bottle (2) are detachably and fixedly connected.

10. The liquid replenishment device for the gas concentration detection sensor according to claim 9, characterized in that, The replenishment bottle (2) has a transparent observation window on the outside.

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