Detection device and detection method

Abstract

The invention provides a detection device and a detection method.The detection device comprises a gas generation device, a sealing cover and a pipeline, the gas generation device comprises a reaction container, the reaction container is used for containing a proper amount of chemical reactants and serves as a reaction place of the chemical reactants, and the chemical reactants are subjected to a chemical reaction under preset conditions; the detection gas is the same as the gas detected by the gas concentration detector. The sealing cover is used for sealing the gas concentration detector, and the volume of the sealing cover is larger than that of the gas concentration detector. One end of the pipeline is connected with the gas generating device, and the other end of the pipeline is connected with the sealing cover to conduct detection gas generated in the reaction container to the sealing cover. The detection device is simple in structure, a proper amount of detection gas is generated under the preset condition only in the use process, and the accident rate caused by gas leakage can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of detecting the effectiveness of a gas concentration detector, and in particular, relates to a detection device and a detection method. Background Art

[0002] With the popularization of gas in urban life, gas safety supervision faces unprecedented challenges. Gas leakage accidents occur frequently, which may be caused by poor performance and improper maintenance of gas concentration detectors (alarms), resulting in missed reports, which leads to the inability to be informed in the first time after the safety accident occurs. We need to curb the fire and explosion problems that may be caused by gas leakage as early as possible, and ensuring the effectiveness of combustible gas concentration detectors (alarms) is the first line of defense after natural gas leaks.

[0003] At present, the detection of gas detectors (alarms) in the market mostly relies on traditional methods - carrying natural gas pure gas or diluted gas cylinders, releasing a certain concentration of natural gas in the environment during detection, and testing whether the combustible gas concentration detector has a response action to determine whether the gas concentration detector is effective. This method has a cumbersome detection process, and requires carrying a gas analyzer and a gas cylinder. The gas cylinder is large in size, and the volume of combustible gas carried is large. If gas leakage occurs during transportation, storage, and use, accidents are prone to occur. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a detection device, which aims to solve the problem that the gas cylinders used to detect the effectiveness of gas concentration detectors are large in size and carry a large volume of combustible gas. If gas leakage occurs during the detection process, accidents are likely to occur.

[0005] In order to solve the above technical problems, in a first aspect, the present application provides a detection device, which is used to detect the effectiveness of a gas concentration detector, comprising:

[0006] The gas generating device comprises a reaction container, wherein the reaction container is used to contain chemical reactants and serves as a reaction site for the chemical reactants, wherein the chemical reactants produce chemical reactions under preset conditions and generate detection gas, wherein the detection gas is the same as the gas detected by the gas concentration detector;

[0007] A sealing cover, the sealing cover is used to seal the gas concentration detector, and the volume of the sealing cover is larger than the volume of the gas concentration detector;

[0008] A pipeline, one end of which is connected to the gas generating device, and the other end of which is connected to the sealing cover, so as to conduct the detection gas generated in the reaction container to the sealing cover.

[0009] Furthermore, the gas generating device comprises a shell, the shell is provided with a connecting port, the reaction container is passed through the connecting port, and the opening of the reaction container is oriented in the same direction as the connecting port.

[0010] Furthermore, the reaction container is provided with an edge, the edge is arranged around the circumference of the opening, and the edge abuts against the edge of the connecting port.

[0011] Furthermore, the shell is provided with a accommodating cavity, the accommodating cavity is used to accommodate the reaction container, and the volume of the accommodating cavity is larger than the volume of the reaction container.

[0012] Furthermore, the accommodating chamber is provided with a plurality of heaters, and the heaters are arranged around the circumference of the reaction container.

[0013] Furthermore, a groove is provided at the bottom of the shell, the opening of the groove faces downward, a bottom edge is provided on the peripheral side of the groove, and the bottom edge is integrally formed with the shell wall of the shell.

[0014] Furthermore, the shell is provided with a handle, the handle is connected to the shell wall of the shell, and the handle is provided with an avoidance groove.

[0015] Furthermore, the handle is coated with a heat insulation layer, and the heat insulation layer is at least one of a glass fiber layer, an asbestos layer, a rock wool layer, and a silicate layer.

[0016] Furthermore, the sealing cover is in a truncated cone shape, and is provided with a first connection port and a second connection port, the first connection port and the second connection port are arranged opposite to each other, and the area of ​​the first connection port is smaller than the area of ​​the second connection port.

[0017] Furthermore, the second connection port is provided with a draw cord, and the draw cord is tightened to seal the second connection port.

[0018] In a second aspect, the present application provides a detection method, which is applied to the detection device according to any one of the first aspects, and the detection method includes:

[0019] Obtaining the reaction vessel volume, pipeline volume, detection volume, and detection concentration;

[0020] Determine the amount of chemical reactants based on the reaction vessel volume, pipeline volume, test volume, and test concentration;

[0021] Putting an appropriate amount of the chemical reactant into a reaction container, connecting one end of a pipe to the opening of the reaction container and connecting the other end of the pipe to the sealing cover, and sealing the gas concentration detector with the sealing cover;

[0022] The reaction container is placed under preset conditions, and it is recorded whether the gas concentration detector alarms.

[0023] Further, the amount of gas concentration detectors required to generate an alarm is detected by a syringe; and / or

[0024] Determining the amount of chemical reactants according to the reaction container volume, the pipeline volume, the detection amount, and the detection concentration includes:

[0025] Determining the required gas volume according to the reaction container volume, the pipeline volume, the detection amount and the detection concentration;

[0026] determining the amount of the chemical reactant based on the gas volume;

[0027] The required gas volume is the product of the sum of the reaction container volume, the pipeline volume, the detection amount and the detection concentration.

[0028] Furthermore, the gas concentration detector is used to detect natural gas, the chemical reactants include anhydrous sodium acetate and sodium hydroxide, and the preset condition is heating.

[0029] The present application discloses a detection device, including a gas generating device, a sealing cover, and a pipeline. The gas generating device includes a reaction container, which is used to hold an appropriate amount of chemical reactants and serve as a reaction site for the chemical reactants. The chemical reactants produce a chemical reaction under preset conditions and generate a detection gas, which is the same as the gas detected by the gas concentration detector. The sealing cover is used to seal the gas concentration detector, and the volume of the sealing cover is larger than the volume of the gas concentration detector. One end of the pipeline is connected to the gas generating device, and the other end is connected to the sealing cover, so that the detection gas generated in the reaction container is conducted to the sealing cover. The detection device of the present application has a simple structure, and produces an appropriate amount of detection gas under preset conditions during use, which can reduce the accident rate caused by gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the detection device in the embodiment of the present application;

[0031] Figure 2 is a schematic cross-sectional structure diagram of a gas generating device in an embodiment of the present application;

[0032] Figure 3 is a schematic diagram of the assembly structure of the gas generating device in the embodiment of the present application;

[0033] Figure 4 It is a flow chart of the detection method in the embodiment of the present application.

[0034] In the accompanying drawings, each figure mark represents: 100, detection device; 1, gas generating device; 11, reaction container; 12, shell; 121, connection port; 122, accommodating chamber; 1221, heater; 123, groove; 124, bottom edge; 125, handle; 1251, avoidance groove; 2, sealing cover; 21, first connection port; 22, second connection port; 23, pull rope; 3, pipeline. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] At present, the detection of gas detectors (alarms) in the market mostly relies on traditional methods - carrying natural gas pure gas or diluted gas cylinders, releasing a certain concentration of natural gas in the environment during detection, and testing whether the combustible gas concentration detector has a response action to determine whether the gas concentration detector is effective. This method has a cumbersome detection process, and requires carrying a gas analyzer and a gas cylinder. The gas cylinder is large in size, and the volume of combustible gas carried is large. If gas leakage occurs during transportation, storage, and use, accidents are prone to occur.

[0039] In order to solve the above technical problems, the present application proposes a detection device 100, which has a simple structure and generates an appropriate amount of detection gas under preset conditions during use, thereby reducing the accident rate caused by gas leakage.

[0040] As attached Figure 1 As shown in FIG. 1 , it is a schematic diagram of the overall structure of the detection device 100 in the embodiment of the present application; Figure 2 As shown in FIG. 1 , it is a schematic diagram of the cross-sectional structure of the detection device 100 in the embodiment of the present application; Figure 3 As shown, it is a schematic diagram of the assembly structure of the detection device 100 in the embodiment of the present application. As can be seen from the figure, the detection device 100 of the present application includes a gas generating device 1, a sealing cover 2, and a pipeline 3. The gas generating device 1 includes a reaction vessel 11, and the reaction vessel 11 is used to hold an appropriate amount of chemical reactants and serve as a reaction place for the chemical reactants. The chemical reactants produce a chemical reaction under preset conditions and generate a detection gas, and the detection gas is the same as the gas detected by the gas concentration detector. The preset conditions include temperature, stirring, etc., and the preset conditions are determined according to the reaction conditions of the chemical reactants. The reaction vessel 11 can be reused and multiple detections can be achieved. Exemplarily, the reaction vessel 11 can be a test tube, a reactor, etc. In this embodiment, the reaction vessel 11 is a test tube as an example. The test tube is heat-resistant and easy to clean, and can be reused to save resources.

[0041] The sealing cover 2 is used to seal the gas concentration detector, and the volume of the sealing cover 2 is larger than the volume of the gas concentration detector. Sealing the gas concentration detector means wrapping the gas concentration detector with the sealing cover 2 so that an air cavity is formed inside the sealing cover 2, and the gas concentration detector is inside the air cavity to provide a detection environment for the gas concentration detector. The volume of the sealing cover 2 is larger than the volume of the gas concentration detector. The volume of the air cavity that needs to be formed by the sealing cover 2 is larger than the volume of the gas concentration detector. The gas concentration detector is located inside the air cavity, which can prevent the sealing cover 2 from blocking the gas concentration detector, thereby failing to detect the gas concentration of the air cavity.

[0042] One end of the pipeline 3 is connected to the gas generating device 1, and the other end is connected to the sealing cover 2, so as to conduct the detection gas generated in the reaction container 11 to the sealing cover 2. The pipeline 3 can conduct the sealing cover 2 and the reaction container 11, so that the gas generated by the reaction container 11 can flow into the sealing cover 2 to form a detection environment with a preset gas concentration.

[0043] Through the above-mentioned embodiments, the detection device 100 of the present application generates combustible gas through the gas generating device 1, thereby avoiding the leakage of combustible gas when not checked, and reducing the accident rate caused by gas leakage. In addition, the detection device 100 has a simple structure and does not require professional personnel to operate. Users can use the detection device 100 of the present application to detect the effectiveness of the gas concentration detector.

[0044] In some embodiments, the gas generating device 1 includes a shell 12, the shell 12 is provided with a connection port 121, the reaction vessel 11 is passed through the connection port 121, the shell 12 can protect the reaction vessel 11, and can provide reaction conditions for the reaction vessel 11. It can be a heat-resistant material, such as metal or ceramic. The opening of the reaction vessel 11 is in the same direction as the connection port 121, so that it is convenient for the pipeline 3 to be connected to the opening of the reaction vessel 11. The upper end of the shell 12 gradually approaches the connection port 121 along the height direction, and the outer diameter of the shell 12 gradually decreases until it is consistent with the size of the connection port 121. In this way, the upper end of the shell 12 is like an inverted funnel.

[0045] In some embodiments, the reaction container 11 is provided with an edge, which is arranged around the opening, and the edge abuts against the edge of the connection port 121. When the edge abuts against the edge of the connection port 121, the reaction container 11 is supported on the connection port 121, and the reaction container 11 extends into the shell 12, and the edge can prevent the reaction container 11 from falling completely into the shell 12. In this way, the reaction container 11 can be removed from the connection port 121, so that the reaction container 11 can be replaced and cleaned.

[0046] In some embodiments, a rotating portion (not marked in the figure) is provided on the edge of the connection port 121. When the reaction container 11 is inserted into the connection port 121, the rotating portion abuts against the reaction container 11. The rotating portion can rotate relative to the shell 12. When the detection device 100 is used, the rotating portion can be rotated, and the rotating portion drives the reaction container 11 to rotate, thereby causing the chemical reactants in the reaction container 11 to flip over so as to contact and fully react.

[0047] In some embodiments, the housing 12 is provided with a receiving cavity 122, and the receiving cavity 122 is used to receive the reaction container 11, and the volume of the receiving cavity 122 is larger than the volume of the reaction container 11. The reaction container 11 is disposed in the container cavity, and the housing 12 can protect the reaction container 11 and prevent other objects from colliding with the reaction container 11.

[0048] In some embodiments, the accommodating chamber 122 is provided with a plurality of heaters 1221, and the heaters 1221 are used to heat the reaction container 11 so that the chemical reactants in the reaction container 11 react to generate test gas. A socket is provided outside the shell 12, and the socket is connected to the heater 1221 through a cable. When the detection device 100 is used to detect the effectiveness of the gas concentration detector, the socket is connected to the power supply to supply power to the heater 1221, and the heater 1221 converts electrical energy into thermal energy, thereby heating the reaction container 11. The heater 1221 is arranged around the reaction container 11, so that the temperature difference around the reaction container 11 can be small. A controller can be provided outside the shell 12, and the controller is respectively connected to the socket and the heater 1221, and is used to control the voltage or current supplied to the heater 1221, thereby controlling the temperature of the heater 1221, so as to achieve the purpose of adjusting the temperature of the reaction container 11.

[0049] Furthermore, a temperature sensor is provided inside the shell 12 , and the temperature sensor is connected to the controller. The temperature sensor transmits the temperature information inside the shell 12 to the controller, and the controller controls the voltage or current supplied to the heater 1221 according to the temperature information, thereby controlling the reaction container 11 .

[0050] In some implementations, the accommodating cavity 122 is not provided with a heater 1221. When the detection device 100 is used to detect the effectiveness of the gas concentration detector, the housing 12 is placed on a natural gas stove in the user's kitchen for heating, thereby increasing the temperature of the reaction container 11, and the chemical reactants in the reaction container 11 react to produce reaction gas. In this way, the heater 1221 does not need to be provided, and the production cost of the detection device 100 can be reduced.

[0051] In some implementations, a groove 123 is provided at the bottom of the shell 12, the opening of the groove 123 faces downward, and a bottom edge 124 is provided around the groove 123. The bottom edge 124 is integrally formed with the shell wall of the shell 12. When the accommodating cavity 122 is not provided with a heater 1221, the bottom edge 124 facilitates the detection container to be placed on the natural gas stove in the user's kitchen. The groove 123 is used to accommodate the flame formed by the combustion of natural gas, so that the outer layer of the flame contacts the bottom of the shell 12, so that the heat generated by the flame can be better transferred to the shell 12, thereby increasing the temperature of the reaction container 11.

[0052] In some implementations, the housing 12 is provided with a handle 125, which is connected to the housing wall of the housing 12 and has an avoidance groove 1251. The handle 125 facilitates carrying the housing 12, thereby carrying the detection device 100. In particular, when the temperature of the housing 12 is high, direct contact with the housing 12 can be avoided.

[0053] Based on the design that the shell 12 is provided with a handle 125, the handle 125 is covered with an insulation layer, and the insulation layer is at least one of a glass fiber layer, an asbestos layer, a rock wool layer, and a silicate layer. Such a design can prevent heat from being transferred to the handle 125, causing the temperature of the handle 125 to be too high and scalding the user.

[0054] In some implementations, the sealing cover 2 is truncated cone-shaped. The truncated cone-shaped sealing cover 2 can make the connection port 121 of the truncated cone-shaped sealing cover 2 larger, and the gas concentration detector can be covered through the connection port 121. The connection port 121 is larger and can easily cover the gas concentration detector. The sealing cover 2 is provided with a first connection port 21 and a second connection port 22. The first connection port 21 and the second connection port 22 are arranged opposite to each other, and the area of ​​the first connection port 21 is smaller than the area of ​​the second connection port 22. That is, the gas concentration detector is covered by the second connection port 22. The first connection port 21 and the second connection port 22 are arranged at the position of the upper and lower bottom surfaces of the truncated cone, so that the gas can easily move from the first connection port 21 to the air cavity formed by the sealing cover 2.

[0055] In some implementations, the second connection port 22 is provided with a drawstring 23, and the drawstring 23 is tightened to seal the second connection port 22. After the sealing cover 2 covers the gas concentration detector, the drawstring 23 is pulled, and the second connection port 22 shrinks. After the drawstring 23 is tightened, the second connection port 22 can be roughly sealed, so that the gas concentration detector is in a sealed space, which can prevent the detection gas generated in the reaction container 11 from overflowing and ensure the gas concentration in the closed space.

[0056] As attached Figure 4 As shown, the present application also provides a detection method, which is applied to the detection device 100 as in any of the above embodiments. The above embodiments have described the structure of the detection device 100 in detail, which will not be repeated here. Please refer to the detection device 100 in the above embodiments. The detection method includes the following steps.

[0057] S11: Obtaining the volume of the reaction container 11, the volume of the pipeline 3, the detection amount and the detection concentration;

[0058] S12: Determine the amount of chemical reactants according to the volume of the reaction container 11, the volume of the pipeline 3, the detection amount and the detection concentration;

[0059] S13: Put an appropriate amount of chemical reactants into the reaction container 11, connect one end of the pipe 3 to the opening of the reaction container 11 and connect the other end of the pipe 3 to the sealing cover 2, and seal the gas concentration detector with the sealing cover 2;

[0060] S14: placing the reaction container 11 under preset conditions and recording whether the gas concentration detector alarms.

[0061] Taking the gas concentration detector as a natural gas concentration detector as an example, the natural gas (natural gas is CH4) produced by the reaction container 11 needs to fill the air cavity of the reaction container 11, the pipeline 3 and the sealing cover 2. Then it is necessary to calculate the natural gas that the reaction container 11, the pipeline 3 and the sealing cover 2 need to accommodate to avoid the gas produced by the reaction container 11 from being unable to flow to the natural gas concentration detector, so that the effectiveness of the natural gas concentration detector cannot be detected. In addition, the detection amount also needs to be calculated. The detection amount refers to the amount of gas consumed when the gas concentration detector detects the concentration of the gas. The following embodiments will give examples of the detection amount, which will not be described in detail here.

[0062] During the gas flow, the residual gas in the pipe 3 can be regarded as the total volume of the pipe 3. Assuming that the radius of the pipe 3 used is r and the length is h, the residual gas volume in the pipe 3 is: V = πr 2 h. Taking catering users as an example, the alarm is installed at a distance of 30cm from the ceiling. According to the "Food Building Design Standard" JGJ64-2017, the indoor net height of the kitchen area is not less than 2.5m. Taking 3m as an example, if a rubber hose with a diameter of 8mm is used, the gas volume in the tube is 0.15L at this time. Taking the reaction vessel 11 as a test tube with a volume of 2.83 cm in diameter and a height of 11.31 cm, the test tube volume is 0.071L. Taking the detection amount of 0.279L as an example, the volume of the required gas is 0.5L. It should be noted that the sealing cover 2 can be plastic and can be deformed and shrunk, so the volume of the sealing cover 2 is not calculated. If the sealing cover 2 can be completely bulged, the volume of the sealing cover 2 can also be calculated. In this embodiment, the volume of the sealing cover 2 is not calculated, but it does not mean that the volume of the sealing cover 2 cannot be calculated. In addition, since there is air in the pipe 3 and the test tube itself, when gas is generated, the volume of gas in the pipe 3, the test tube and the sealing cover 2 will be greater than the volume of gas before the chemical reactants in the reaction vessel 11 react before and after the reaction. The sealing cover 2 is not calculated, and the volume of gas that can be accommodated by the sealing cover 2 can be used to accommodate the incremental gas. The effectiveness detection of the gas concentration detector refers to: detecting whether the gas concentration detector can effectively alarm when the natural gas concentration approaches the lower limit of the preset concentration range. In this embodiment, the detection concentration is a volume fraction of 3%, so the volume of natural gas required to be generated by the reaction vessel 11 is 0.015 liters.

[0063] Chemical reactants may include anhydrous sodium acetate and soda lime, with sodium hydroxide accounting for 25%. Under standard atmospheric pressure and 20 degrees Celsius, approximately 0.0502 grams of anhydrous sodium acetate and 0.098 grams of soda lime (containing 25% sodium hydroxide) are required to prepare 0.015 liters of natural gas. Anhydrous sodium acetate and soda lime (containing 25% sodium hydroxide) cannot react at room temperature and need to be heated to about 350°C.

[0064] In some embodiments, the amount of test gas required for multiple or multiple gas concentration detector alarms is detected by a syringe. The syringe needle is used to sample natural gas. After sampling, the needle is pulled out, the opening of the syringe is placed about 3 cm below the probe of the gas concentration detector, and the syringe is slowly pushed to release the test natural gas until the gas concentration detector alarms, and the gas scale used is recorded. Each experiment is 2-3 minutes apart, and the gas volume in the syringe before the experiment is 500 ml. The experiment was repeated five times, and the detection amount of each experiment was 275 ml, 283 ml, 279 ml, 276 ml and 282 ml respectively. The average value of the test gas consumed in the five experiments is 279 ml, that is, 0.297 L, and the average value is used as the amount of test gas required by the gas concentration detector itself, that is, the detection amount is 0.297 L. The step of detecting the detection amount of the gas concentration detector can be tested by the manufacturer of the detection device 100, and the detection amount of the gas concentration detector is marked on the packaging bag of the detection device 100 to avoid the user from experimenting again to obtain the detection amount, which can reduce the time for the user to detect the effectiveness of the gas concentration detector.

[0065] In some embodiments, step S12, determining the amount of the chemical reactant according to the volume of the reaction container 11, the volume of the pipeline 3, the detected amount and the detected concentration, includes:

[0066] S121: Determine the required gas volume according to the volume of the reaction container 11, the volume of the pipeline 3, the detected amount and the detected concentration;

[0067] S122: Determine the amount of the chemical reactant according to the gas volume;

[0068] The required gas volume is the product of the sum of the volume of the reaction container 11, the volume of the pipeline 3, the detection amount and the detection concentration.

[0069] As exemplified in the above embodiment, a rubber hose with a diameter of 8 mm is used, and the gas volume in the tube is 0.15 L at this time. Taking the reaction container 11 as a test tube with a volume of 2.83 cm in diameter and a height of 11.31 cm as an example, the test tube volume is 0.071 L. Taking the detection amount as 0.279 L as an example, the required gas volume is 0.5 L. The detection concentration is 3%, that is, the effectiveness of the gas concentration detector when the natural gas concentration is 3%, that is, whether the gas concentration detector sounds an alarm when the natural gas concentration is 3%. If the gas concentration detector sounds an alarm, the gas concentration detector is effective when the natural gas concentration is 3%; if the gas concentration detector does not sound an alarm, the gas concentration detector fails when the natural gas concentration is 3%, and the gas concentration detector can be replaced. Since the detection concentration setting of each gas concentration detector is different, the detection concentration can be determined according to the actual situation, and the present application does not limit the specific value of the detection concentration. The required gas volume is the product of 0.5 L and 0.03, that is, 0.015 L. Under standard atmospheric pressure and 20 degrees Celsius, about 0.0502 grams of anhydrous sodium acetate and 0.098 grams of soda lime (containing 25% sodium hydroxide) are needed to prepare 0.015 liters of natural gas. The environment with a natural gas concentration detector is mainly a kitchen using a natural gas cooker. Therefore, heating conditions can be easily obtained, and the outer flame temperature of the natural gas stove flame can reach 400°C to 500°C. The conditions for the chemical reactants in the reaction container 11 to react and prepare natural gas can be met.

[0070] In some embodiments, the gas concentration detector is used to detect natural gas, the chemical reactants include anhydrous sodium acetate and sodium hydroxide, and the preset condition is heating. Natural gas has many usage scenarios, that is, almost every household in the city can use natural gas, and the natural gas concentration detector used to detect natural gas leaks is widely used. Gas leakage accidents occur frequently, and there are cases of missed reports due to poor performance and improper maintenance of gas concentration detectors (alarms), which leads to the inability to be informed in the first time after the occurrence of safety accidents. We need to curb the fire and explosion problems that may be caused by gas leaks as much as possible in the early stages of gas leaks, and ensuring the effectiveness of combustible gas concentration detectors (alarms) is the first line of defense after natural gas leaks.

[0071] In some embodiments, the use and operation steps of the detection device 100 are as follows: add 0.0502 grams of anhydrous sodium acetate and 0.098 grams of soda lime (containing 25% sodium hydroxide) to the reaction container 11 (a test tube with a diameter of 2.83 cm and a height of 11.31 cm), and seal the opening of the reaction container 11. Carry the detection device 100 to the test area, connect one end of a 3m long pipe (rubber hose) to the opening of the reaction container 11, and the other end to the sealing cover 2, the sealing cover 2 will wrap the gas concentration detector, place the shell 12 of the detection device 100 in a natural gas stove, ignite the natural gas stove to heat the reaction container 11, so that the chemical reactants in the reaction container 11 react to produce natural gas, and the natural gas is fully mixed with the air in the reaction container 11 and the pipeline 3, so that the natural gas concentration of the mixed gas reaches about 3%. During this process, observe whether the gas concentration detector alarms.

[0072] If a heater 1221 is provided in the shell 12 of the detection device 100, there is no need to place the shell 12 on a gas stove for heating. The socket of the heater 1221 can be directly connected to a power source. The detection device provided with the heater 1221 can be tested in an environment without a gas stove, which is more convenient.

[0073] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A detection device, characterized in that: The detection device is used to detect the effectiveness of the gas concentration detector, including: The gas generating device comprises a reaction container, wherein the reaction container is used to hold an appropriate amount of chemical reactants and serves as a reaction site for the chemical reactants, wherein the chemical reactants produce a chemical reaction under preset conditions and generate a detection gas, wherein the detection gas is the same as the gas detected by the gas concentration detector; A sealing cover, the sealing cover is used to seal the gas concentration detector, and the volume of the sealing cover is larger than the volume of the gas concentration detector; A pipeline, one end of which is connected to the gas generating device, and the other end of which is connected to the sealing cover, so as to conduct the detection gas generated in the reaction container to the sealing cover.

2. The detection device according to claim 1, characterized in that: The gas generating device comprises a shell, the shell is provided with a connecting port, the reaction container is passed through the connecting port, and the opening of the reaction container is in the same direction as the connecting port.

3. The detection device according to claim 2, characterized in that: The reaction container is provided with an edge, the edge is arranged around the circumference of the opening, and the edge abuts against the edge of the connecting port.

4. The detection device according to claim 2, characterized in that: The shell is provided with a accommodating cavity, the accommodating cavity is used to accommodate the reaction container, and the volume of the accommodating cavity is larger than the volume of the reaction container.

5. The detection device according to claim 4, characterized in that: The accommodating chamber is provided with a plurality of heaters, and the heaters are arranged around the circumference of the reaction container.

6. The detection device according to claim 2, characterized in that: The bottom of the shell is provided with a groove, the opening of the groove faces downward, and the peripheral side of the groove is provided with a bottom edge, and the bottom edge is integrally formed with the shell wall of the shell.

7. The detection device according to claim 2, characterized in that: The shell body is provided with a handle, the handle is connected to the shell wall of the shell body, and the handle is provided with an avoidance groove.

8. The detection device according to claim 7, characterized in that: The handle is covered with a heat insulation layer, and the heat insulation layer is at least one of a glass fiber layer, an asbestos layer, a rock wool layer, and a silicate layer.

9. The detection device according to claim 1, characterized in that: The sealing cover is in a truncated cone shape and is provided with a first connection port and a second connection port. The first connection port and the second connection port are arranged opposite to each other, and the area of ​​the first connection port is smaller than the area of ​​the second connection port.

10. The detection device according to claim 9, characterized in that: The second connection port is provided with a draw cord, and the draw cord is tightened to seal the second connection port.

11. A detection method, characterized in that: The detection method is applied to the detection device according to any one of claims 1 to 10, and the detection method comprises: Obtaining the reaction vessel volume, pipeline volume, detection volume, and detection concentration; Determining the amount of chemical reactants according to the reaction container volume, the pipeline volume, the detected amount, and the detected concentration; Putting an appropriate amount of the chemical reactant into a reaction container, connecting one end of a pipe to the opening of the reaction container and connecting the other end of the pipe to the sealing cover, and sealing the gas concentration detector with the sealing cover; The reaction container is placed under preset conditions, and it is recorded whether the gas concentration detector alarms.

12. The detection method according to claim 11, characterized in that: Detection of the required amount of gas concentration detector alarms by syringe; and / or Determining the amount of chemical reactants according to the reaction container volume, the pipeline volume, the detection amount, and the detection concentration includes: Determining the required gas volume according to the reaction container volume, the pipeline volume, the detection amount and the detection concentration; determining the amount of the chemical reactant based on the gas volume; The required gas volume is the product of the sum of the reaction container volume, the pipeline volume, the detection amount and the detection concentration.

13. The detection method according to claim 11, characterized in that: The gas concentration detector is used to detect natural gas, the chemical reactants include anhydrous sodium acetate and sodium hydroxide, and the preset condition is heating.

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